File: | tools/clang/lib/Sema/SemaTemplate.cpp |
Warning: | line 6759, column 8 Called C++ object pointer is null |
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1 | //===------- SemaTemplate.cpp - Semantic Analysis for C++ Templates -------===// | |||
2 | // | |||
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | |||
4 | // See https://llvm.org/LICENSE.txt for license information. | |||
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | |||
6 | //===----------------------------------------------------------------------===// | |||
7 | // | |||
8 | // This file implements semantic analysis for C++ templates. | |||
9 | //===----------------------------------------------------------------------===// | |||
10 | ||||
11 | #include "TreeTransform.h" | |||
12 | #include "clang/AST/ASTConsumer.h" | |||
13 | #include "clang/AST/ASTContext.h" | |||
14 | #include "clang/AST/DeclFriend.h" | |||
15 | #include "clang/AST/DeclTemplate.h" | |||
16 | #include "clang/AST/Expr.h" | |||
17 | #include "clang/AST/ExprCXX.h" | |||
18 | #include "clang/AST/RecursiveASTVisitor.h" | |||
19 | #include "clang/AST/TypeVisitor.h" | |||
20 | #include "clang/Basic/Builtins.h" | |||
21 | #include "clang/Basic/LangOptions.h" | |||
22 | #include "clang/Basic/PartialDiagnostic.h" | |||
23 | #include "clang/Basic/Stack.h" | |||
24 | #include "clang/Basic/TargetInfo.h" | |||
25 | #include "clang/Sema/DeclSpec.h" | |||
26 | #include "clang/Sema/Lookup.h" | |||
27 | #include "clang/Sema/ParsedTemplate.h" | |||
28 | #include "clang/Sema/Scope.h" | |||
29 | #include "clang/Sema/SemaInternal.h" | |||
30 | #include "clang/Sema/Template.h" | |||
31 | #include "clang/Sema/TemplateDeduction.h" | |||
32 | #include "llvm/ADT/SmallBitVector.h" | |||
33 | #include "llvm/ADT/SmallString.h" | |||
34 | #include "llvm/ADT/StringExtras.h" | |||
35 | ||||
36 | #include <iterator> | |||
37 | using namespace clang; | |||
38 | using namespace sema; | |||
39 | ||||
40 | // Exported for use by Parser. | |||
41 | SourceRange | |||
42 | clang::getTemplateParamsRange(TemplateParameterList const * const *Ps, | |||
43 | unsigned N) { | |||
44 | if (!N) return SourceRange(); | |||
45 | return SourceRange(Ps[0]->getTemplateLoc(), Ps[N-1]->getRAngleLoc()); | |||
46 | } | |||
47 | ||||
48 | namespace clang { | |||
49 | /// [temp.constr.decl]p2: A template's associated constraints are | |||
50 | /// defined as a single constraint-expression derived from the introduced | |||
51 | /// constraint-expressions [ ... ]. | |||
52 | /// | |||
53 | /// \param Params The template parameter list and optional requires-clause. | |||
54 | /// | |||
55 | /// \param FD The underlying templated function declaration for a function | |||
56 | /// template. | |||
57 | static Expr *formAssociatedConstraints(TemplateParameterList *Params, | |||
58 | FunctionDecl *FD); | |||
59 | } | |||
60 | ||||
61 | static Expr *clang::formAssociatedConstraints(TemplateParameterList *Params, | |||
62 | FunctionDecl *FD) { | |||
63 | // FIXME: Concepts: collect additional introduced constraint-expressions | |||
64 | assert(!FD && "Cannot collect constraints from function declaration yet.")((!FD && "Cannot collect constraints from function declaration yet." ) ? static_cast<void> (0) : __assert_fail ("!FD && \"Cannot collect constraints from function declaration yet.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 64, __PRETTY_FUNCTION__)); | |||
65 | return Params->getRequiresClause(); | |||
66 | } | |||
67 | ||||
68 | /// Determine whether the declaration found is acceptable as the name | |||
69 | /// of a template and, if so, return that template declaration. Otherwise, | |||
70 | /// returns null. | |||
71 | /// | |||
72 | /// Note that this may return an UnresolvedUsingValueDecl if AllowDependent | |||
73 | /// is true. In all other cases it will return a TemplateDecl (or null). | |||
74 | NamedDecl *Sema::getAsTemplateNameDecl(NamedDecl *D, | |||
75 | bool AllowFunctionTemplates, | |||
76 | bool AllowDependent) { | |||
77 | D = D->getUnderlyingDecl(); | |||
78 | ||||
79 | if (isa<TemplateDecl>(D)) { | |||
80 | if (!AllowFunctionTemplates && isa<FunctionTemplateDecl>(D)) | |||
81 | return nullptr; | |||
82 | ||||
83 | return D; | |||
84 | } | |||
85 | ||||
86 | if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(D)) { | |||
87 | // C++ [temp.local]p1: | |||
88 | // Like normal (non-template) classes, class templates have an | |||
89 | // injected-class-name (Clause 9). The injected-class-name | |||
90 | // can be used with or without a template-argument-list. When | |||
91 | // it is used without a template-argument-list, it is | |||
92 | // equivalent to the injected-class-name followed by the | |||
93 | // template-parameters of the class template enclosed in | |||
94 | // <>. When it is used with a template-argument-list, it | |||
95 | // refers to the specified class template specialization, | |||
96 | // which could be the current specialization or another | |||
97 | // specialization. | |||
98 | if (Record->isInjectedClassName()) { | |||
99 | Record = cast<CXXRecordDecl>(Record->getDeclContext()); | |||
100 | if (Record->getDescribedClassTemplate()) | |||
101 | return Record->getDescribedClassTemplate(); | |||
102 | ||||
103 | if (ClassTemplateSpecializationDecl *Spec | |||
104 | = dyn_cast<ClassTemplateSpecializationDecl>(Record)) | |||
105 | return Spec->getSpecializedTemplate(); | |||
106 | } | |||
107 | ||||
108 | return nullptr; | |||
109 | } | |||
110 | ||||
111 | // 'using Dependent::foo;' can resolve to a template name. | |||
112 | // 'using typename Dependent::foo;' cannot (not even if 'foo' is an | |||
113 | // injected-class-name). | |||
114 | if (AllowDependent && isa<UnresolvedUsingValueDecl>(D)) | |||
115 | return D; | |||
116 | ||||
117 | return nullptr; | |||
118 | } | |||
119 | ||||
120 | void Sema::FilterAcceptableTemplateNames(LookupResult &R, | |||
121 | bool AllowFunctionTemplates, | |||
122 | bool AllowDependent) { | |||
123 | LookupResult::Filter filter = R.makeFilter(); | |||
124 | while (filter.hasNext()) { | |||
125 | NamedDecl *Orig = filter.next(); | |||
126 | if (!getAsTemplateNameDecl(Orig, AllowFunctionTemplates, AllowDependent)) | |||
127 | filter.erase(); | |||
128 | } | |||
129 | filter.done(); | |||
130 | } | |||
131 | ||||
132 | bool Sema::hasAnyAcceptableTemplateNames(LookupResult &R, | |||
133 | bool AllowFunctionTemplates, | |||
134 | bool AllowDependent, | |||
135 | bool AllowNonTemplateFunctions) { | |||
136 | for (LookupResult::iterator I = R.begin(), IEnd = R.end(); I != IEnd; ++I) { | |||
137 | if (getAsTemplateNameDecl(*I, AllowFunctionTemplates, AllowDependent)) | |||
138 | return true; | |||
139 | if (AllowNonTemplateFunctions && | |||
140 | isa<FunctionDecl>((*I)->getUnderlyingDecl())) | |||
141 | return true; | |||
142 | } | |||
143 | ||||
144 | return false; | |||
145 | } | |||
146 | ||||
147 | TemplateNameKind Sema::isTemplateName(Scope *S, | |||
148 | CXXScopeSpec &SS, | |||
149 | bool hasTemplateKeyword, | |||
150 | const UnqualifiedId &Name, | |||
151 | ParsedType ObjectTypePtr, | |||
152 | bool EnteringContext, | |||
153 | TemplateTy &TemplateResult, | |||
154 | bool &MemberOfUnknownSpecialization) { | |||
155 | assert(getLangOpts().CPlusPlus && "No template names in C!")((getLangOpts().CPlusPlus && "No template names in C!" ) ? static_cast<void> (0) : __assert_fail ("getLangOpts().CPlusPlus && \"No template names in C!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 155, __PRETTY_FUNCTION__)); | |||
156 | ||||
157 | DeclarationName TName; | |||
158 | MemberOfUnknownSpecialization = false; | |||
159 | ||||
160 | switch (Name.getKind()) { | |||
161 | case UnqualifiedIdKind::IK_Identifier: | |||
162 | TName = DeclarationName(Name.Identifier); | |||
163 | break; | |||
164 | ||||
165 | case UnqualifiedIdKind::IK_OperatorFunctionId: | |||
166 | TName = Context.DeclarationNames.getCXXOperatorName( | |||
167 | Name.OperatorFunctionId.Operator); | |||
168 | break; | |||
169 | ||||
170 | case UnqualifiedIdKind::IK_LiteralOperatorId: | |||
171 | TName = Context.DeclarationNames.getCXXLiteralOperatorName(Name.Identifier); | |||
172 | break; | |||
173 | ||||
174 | default: | |||
175 | return TNK_Non_template; | |||
176 | } | |||
177 | ||||
178 | QualType ObjectType = ObjectTypePtr.get(); | |||
179 | ||||
180 | AssumedTemplateKind AssumedTemplate; | |||
181 | LookupResult R(*this, TName, Name.getBeginLoc(), LookupOrdinaryName); | |||
182 | if (LookupTemplateName(R, S, SS, ObjectType, EnteringContext, | |||
183 | MemberOfUnknownSpecialization, SourceLocation(), | |||
184 | &AssumedTemplate)) | |||
185 | return TNK_Non_template; | |||
186 | ||||
187 | if (AssumedTemplate != AssumedTemplateKind::None) { | |||
188 | TemplateResult = TemplateTy::make(Context.getAssumedTemplateName(TName)); | |||
189 | // Let the parser know whether we found nothing or found functions; if we | |||
190 | // found nothing, we want to more carefully check whether this is actually | |||
191 | // a function template name versus some other kind of undeclared identifier. | |||
192 | return AssumedTemplate == AssumedTemplateKind::FoundNothing | |||
193 | ? TNK_Undeclared_template | |||
194 | : TNK_Function_template; | |||
195 | } | |||
196 | ||||
197 | if (R.empty()) | |||
198 | return TNK_Non_template; | |||
199 | ||||
200 | NamedDecl *D = nullptr; | |||
201 | if (R.isAmbiguous()) { | |||
202 | // If we got an ambiguity involving a non-function template, treat this | |||
203 | // as a template name, and pick an arbitrary template for error recovery. | |||
204 | bool AnyFunctionTemplates = false; | |||
205 | for (NamedDecl *FoundD : R) { | |||
206 | if (NamedDecl *FoundTemplate = getAsTemplateNameDecl(FoundD)) { | |||
207 | if (isa<FunctionTemplateDecl>(FoundTemplate)) | |||
208 | AnyFunctionTemplates = true; | |||
209 | else { | |||
210 | D = FoundTemplate; | |||
211 | break; | |||
212 | } | |||
213 | } | |||
214 | } | |||
215 | ||||
216 | // If we didn't find any templates at all, this isn't a template name. | |||
217 | // Leave the ambiguity for a later lookup to diagnose. | |||
218 | if (!D && !AnyFunctionTemplates) { | |||
219 | R.suppressDiagnostics(); | |||
220 | return TNK_Non_template; | |||
221 | } | |||
222 | ||||
223 | // If the only templates were function templates, filter out the rest. | |||
224 | // We'll diagnose the ambiguity later. | |||
225 | if (!D) | |||
226 | FilterAcceptableTemplateNames(R); | |||
227 | } | |||
228 | ||||
229 | // At this point, we have either picked a single template name declaration D | |||
230 | // or we have a non-empty set of results R containing either one template name | |||
231 | // declaration or a set of function templates. | |||
232 | ||||
233 | TemplateName Template; | |||
234 | TemplateNameKind TemplateKind; | |||
235 | ||||
236 | unsigned ResultCount = R.end() - R.begin(); | |||
237 | if (!D && ResultCount > 1) { | |||
238 | // We assume that we'll preserve the qualifier from a function | |||
239 | // template name in other ways. | |||
240 | Template = Context.getOverloadedTemplateName(R.begin(), R.end()); | |||
241 | TemplateKind = TNK_Function_template; | |||
242 | ||||
243 | // We'll do this lookup again later. | |||
244 | R.suppressDiagnostics(); | |||
245 | } else { | |||
246 | if (!D) { | |||
247 | D = getAsTemplateNameDecl(*R.begin()); | |||
248 | assert(D && "unambiguous result is not a template name")((D && "unambiguous result is not a template name") ? static_cast<void> (0) : __assert_fail ("D && \"unambiguous result is not a template name\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 248, __PRETTY_FUNCTION__)); | |||
249 | } | |||
250 | ||||
251 | if (isa<UnresolvedUsingValueDecl>(D)) { | |||
252 | // We don't yet know whether this is a template-name or not. | |||
253 | MemberOfUnknownSpecialization = true; | |||
254 | return TNK_Non_template; | |||
255 | } | |||
256 | ||||
257 | TemplateDecl *TD = cast<TemplateDecl>(D); | |||
258 | ||||
259 | if (SS.isSet() && !SS.isInvalid()) { | |||
260 | NestedNameSpecifier *Qualifier = SS.getScopeRep(); | |||
261 | Template = Context.getQualifiedTemplateName(Qualifier, | |||
262 | hasTemplateKeyword, TD); | |||
263 | } else { | |||
264 | Template = TemplateName(TD); | |||
265 | } | |||
266 | ||||
267 | if (isa<FunctionTemplateDecl>(TD)) { | |||
268 | TemplateKind = TNK_Function_template; | |||
269 | ||||
270 | // We'll do this lookup again later. | |||
271 | R.suppressDiagnostics(); | |||
272 | } else { | |||
273 | assert(isa<ClassTemplateDecl>(TD) || isa<TemplateTemplateParmDecl>(TD) ||((isa<ClassTemplateDecl>(TD) || isa<TemplateTemplateParmDecl >(TD) || isa<TypeAliasTemplateDecl>(TD) || isa<VarTemplateDecl >(TD) || isa<BuiltinTemplateDecl>(TD) || isa<ConceptDecl >(TD)) ? static_cast<void> (0) : __assert_fail ("isa<ClassTemplateDecl>(TD) || isa<TemplateTemplateParmDecl>(TD) || isa<TypeAliasTemplateDecl>(TD) || isa<VarTemplateDecl>(TD) || isa<BuiltinTemplateDecl>(TD) || isa<ConceptDecl>(TD)" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 275, __PRETTY_FUNCTION__)) | |||
274 | isa<TypeAliasTemplateDecl>(TD) || isa<VarTemplateDecl>(TD) ||((isa<ClassTemplateDecl>(TD) || isa<TemplateTemplateParmDecl >(TD) || isa<TypeAliasTemplateDecl>(TD) || isa<VarTemplateDecl >(TD) || isa<BuiltinTemplateDecl>(TD) || isa<ConceptDecl >(TD)) ? static_cast<void> (0) : __assert_fail ("isa<ClassTemplateDecl>(TD) || isa<TemplateTemplateParmDecl>(TD) || isa<TypeAliasTemplateDecl>(TD) || isa<VarTemplateDecl>(TD) || isa<BuiltinTemplateDecl>(TD) || isa<ConceptDecl>(TD)" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 275, __PRETTY_FUNCTION__)) | |||
275 | isa<BuiltinTemplateDecl>(TD) || isa<ConceptDecl>(TD))((isa<ClassTemplateDecl>(TD) || isa<TemplateTemplateParmDecl >(TD) || isa<TypeAliasTemplateDecl>(TD) || isa<VarTemplateDecl >(TD) || isa<BuiltinTemplateDecl>(TD) || isa<ConceptDecl >(TD)) ? static_cast<void> (0) : __assert_fail ("isa<ClassTemplateDecl>(TD) || isa<TemplateTemplateParmDecl>(TD) || isa<TypeAliasTemplateDecl>(TD) || isa<VarTemplateDecl>(TD) || isa<BuiltinTemplateDecl>(TD) || isa<ConceptDecl>(TD)" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 275, __PRETTY_FUNCTION__)); | |||
276 | TemplateKind = | |||
277 | isa<VarTemplateDecl>(TD) ? TNK_Var_template : | |||
278 | isa<ConceptDecl>(TD) ? TNK_Concept_template : | |||
279 | TNK_Type_template; | |||
280 | } | |||
281 | } | |||
282 | ||||
283 | TemplateResult = TemplateTy::make(Template); | |||
284 | return TemplateKind; | |||
285 | } | |||
286 | ||||
287 | bool Sema::isDeductionGuideName(Scope *S, const IdentifierInfo &Name, | |||
288 | SourceLocation NameLoc, | |||
289 | ParsedTemplateTy *Template) { | |||
290 | CXXScopeSpec SS; | |||
291 | bool MemberOfUnknownSpecialization = false; | |||
292 | ||||
293 | // We could use redeclaration lookup here, but we don't need to: the | |||
294 | // syntactic form of a deduction guide is enough to identify it even | |||
295 | // if we can't look up the template name at all. | |||
296 | LookupResult R(*this, DeclarationName(&Name), NameLoc, LookupOrdinaryName); | |||
297 | if (LookupTemplateName(R, S, SS, /*ObjectType*/ QualType(), | |||
298 | /*EnteringContext*/ false, | |||
299 | MemberOfUnknownSpecialization)) | |||
300 | return false; | |||
301 | ||||
302 | if (R.empty()) return false; | |||
303 | if (R.isAmbiguous()) { | |||
304 | // FIXME: Diagnose an ambiguity if we find at least one template. | |||
305 | R.suppressDiagnostics(); | |||
306 | return false; | |||
307 | } | |||
308 | ||||
309 | // We only treat template-names that name type templates as valid deduction | |||
310 | // guide names. | |||
311 | TemplateDecl *TD = R.getAsSingle<TemplateDecl>(); | |||
312 | if (!TD || !getAsTypeTemplateDecl(TD)) | |||
313 | return false; | |||
314 | ||||
315 | if (Template) | |||
316 | *Template = TemplateTy::make(TemplateName(TD)); | |||
317 | return true; | |||
318 | } | |||
319 | ||||
320 | bool Sema::DiagnoseUnknownTemplateName(const IdentifierInfo &II, | |||
321 | SourceLocation IILoc, | |||
322 | Scope *S, | |||
323 | const CXXScopeSpec *SS, | |||
324 | TemplateTy &SuggestedTemplate, | |||
325 | TemplateNameKind &SuggestedKind) { | |||
326 | // We can't recover unless there's a dependent scope specifier preceding the | |||
327 | // template name. | |||
328 | // FIXME: Typo correction? | |||
329 | if (!SS || !SS->isSet() || !isDependentScopeSpecifier(*SS) || | |||
330 | computeDeclContext(*SS)) | |||
331 | return false; | |||
332 | ||||
333 | // The code is missing a 'template' keyword prior to the dependent template | |||
334 | // name. | |||
335 | NestedNameSpecifier *Qualifier = (NestedNameSpecifier*)SS->getScopeRep(); | |||
336 | Diag(IILoc, diag::err_template_kw_missing) | |||
337 | << Qualifier << II.getName() | |||
338 | << FixItHint::CreateInsertion(IILoc, "template "); | |||
339 | SuggestedTemplate | |||
340 | = TemplateTy::make(Context.getDependentTemplateName(Qualifier, &II)); | |||
341 | SuggestedKind = TNK_Dependent_template_name; | |||
342 | return true; | |||
343 | } | |||
344 | ||||
345 | bool Sema::LookupTemplateName(LookupResult &Found, | |||
346 | Scope *S, CXXScopeSpec &SS, | |||
347 | QualType ObjectType, | |||
348 | bool EnteringContext, | |||
349 | bool &MemberOfUnknownSpecialization, | |||
350 | SourceLocation TemplateKWLoc, | |||
351 | AssumedTemplateKind *ATK) { | |||
352 | if (ATK) | |||
353 | *ATK = AssumedTemplateKind::None; | |||
354 | ||||
355 | Found.setTemplateNameLookup(true); | |||
356 | ||||
357 | // Determine where to perform name lookup | |||
358 | MemberOfUnknownSpecialization = false; | |||
359 | DeclContext *LookupCtx = nullptr; | |||
360 | bool IsDependent = false; | |||
361 | if (!ObjectType.isNull()) { | |||
362 | // This nested-name-specifier occurs in a member access expression, e.g., | |||
363 | // x->B::f, and we are looking into the type of the object. | |||
364 | assert(!SS.isSet() && "ObjectType and scope specifier cannot coexist")((!SS.isSet() && "ObjectType and scope specifier cannot coexist" ) ? static_cast<void> (0) : __assert_fail ("!SS.isSet() && \"ObjectType and scope specifier cannot coexist\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 364, __PRETTY_FUNCTION__)); | |||
365 | LookupCtx = computeDeclContext(ObjectType); | |||
366 | IsDependent = !LookupCtx && ObjectType->isDependentType(); | |||
367 | assert((IsDependent || !ObjectType->isIncompleteType() ||(((IsDependent || !ObjectType->isIncompleteType() || ObjectType ->castAs<TagType>()->isBeingDefined()) && "Caller should have completed object type") ? static_cast< void> (0) : __assert_fail ("(IsDependent || !ObjectType->isIncompleteType() || ObjectType->castAs<TagType>()->isBeingDefined()) && \"Caller should have completed object type\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 369, __PRETTY_FUNCTION__)) | |||
368 | ObjectType->castAs<TagType>()->isBeingDefined()) &&(((IsDependent || !ObjectType->isIncompleteType() || ObjectType ->castAs<TagType>()->isBeingDefined()) && "Caller should have completed object type") ? static_cast< void> (0) : __assert_fail ("(IsDependent || !ObjectType->isIncompleteType() || ObjectType->castAs<TagType>()->isBeingDefined()) && \"Caller should have completed object type\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 369, __PRETTY_FUNCTION__)) | |||
369 | "Caller should have completed object type")(((IsDependent || !ObjectType->isIncompleteType() || ObjectType ->castAs<TagType>()->isBeingDefined()) && "Caller should have completed object type") ? static_cast< void> (0) : __assert_fail ("(IsDependent || !ObjectType->isIncompleteType() || ObjectType->castAs<TagType>()->isBeingDefined()) && \"Caller should have completed object type\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 369, __PRETTY_FUNCTION__)); | |||
370 | ||||
371 | // Template names cannot appear inside an Objective-C class or object type | |||
372 | // or a vector type. | |||
373 | // | |||
374 | // FIXME: This is wrong. For example: | |||
375 | // | |||
376 | // template<typename T> using Vec = T __attribute__((ext_vector_type(4))); | |||
377 | // Vec<int> vi; | |||
378 | // vi.Vec<int>::~Vec<int>(); | |||
379 | // | |||
380 | // ... should be accepted but we will not treat 'Vec' as a template name | |||
381 | // here. The right thing to do would be to check if the name is a valid | |||
382 | // vector component name, and look up a template name if not. And similarly | |||
383 | // for lookups into Objective-C class and object types, where the same | |||
384 | // problem can arise. | |||
385 | if (ObjectType->isObjCObjectOrInterfaceType() || | |||
386 | ObjectType->isVectorType()) { | |||
387 | Found.clear(); | |||
388 | return false; | |||
389 | } | |||
390 | } else if (SS.isSet()) { | |||
391 | // This nested-name-specifier occurs after another nested-name-specifier, | |||
392 | // so long into the context associated with the prior nested-name-specifier. | |||
393 | LookupCtx = computeDeclContext(SS, EnteringContext); | |||
394 | IsDependent = !LookupCtx; | |||
395 | ||||
396 | // The declaration context must be complete. | |||
397 | if (LookupCtx && RequireCompleteDeclContext(SS, LookupCtx)) | |||
398 | return true; | |||
399 | } | |||
400 | ||||
401 | bool ObjectTypeSearchedInScope = false; | |||
402 | bool AllowFunctionTemplatesInLookup = true; | |||
403 | if (LookupCtx) { | |||
404 | // Perform "qualified" name lookup into the declaration context we | |||
405 | // computed, which is either the type of the base of a member access | |||
406 | // expression or the declaration context associated with a prior | |||
407 | // nested-name-specifier. | |||
408 | LookupQualifiedName(Found, LookupCtx); | |||
409 | ||||
410 | // FIXME: The C++ standard does not clearly specify what happens in the | |||
411 | // case where the object type is dependent, and implementations vary. In | |||
412 | // Clang, we treat a name after a . or -> as a template-name if lookup | |||
413 | // finds a non-dependent member or member of the current instantiation that | |||
414 | // is a type template, or finds no such members and lookup in the context | |||
415 | // of the postfix-expression finds a type template. In the latter case, the | |||
416 | // name is nonetheless dependent, and we may resolve it to a member of an | |||
417 | // unknown specialization when we come to instantiate the template. | |||
418 | IsDependent |= Found.wasNotFoundInCurrentInstantiation(); | |||
419 | } | |||
420 | ||||
421 | if (!SS.isSet() && (ObjectType.isNull() || Found.empty())) { | |||
422 | // C++ [basic.lookup.classref]p1: | |||
423 | // In a class member access expression (5.2.5), if the . or -> token is | |||
424 | // immediately followed by an identifier followed by a <, the | |||
425 | // identifier must be looked up to determine whether the < is the | |||
426 | // beginning of a template argument list (14.2) or a less-than operator. | |||
427 | // The identifier is first looked up in the class of the object | |||
428 | // expression. If the identifier is not found, it is then looked up in | |||
429 | // the context of the entire postfix-expression and shall name a class | |||
430 | // template. | |||
431 | if (S) | |||
432 | LookupName(Found, S); | |||
433 | ||||
434 | if (!ObjectType.isNull()) { | |||
435 | // FIXME: We should filter out all non-type templates here, particularly | |||
436 | // variable templates and concepts. But the exclusion of alias templates | |||
437 | // and template template parameters is a wording defect. | |||
438 | AllowFunctionTemplatesInLookup = false; | |||
439 | ObjectTypeSearchedInScope = true; | |||
440 | } | |||
441 | ||||
442 | IsDependent |= Found.wasNotFoundInCurrentInstantiation(); | |||
443 | } | |||
444 | ||||
445 | if (Found.isAmbiguous()) | |||
446 | return false; | |||
447 | ||||
448 | if (ATK && !SS.isSet() && ObjectType.isNull() && TemplateKWLoc.isInvalid()) { | |||
449 | // C++2a [temp.names]p2: | |||
450 | // A name is also considered to refer to a template if it is an | |||
451 | // unqualified-id followed by a < and name lookup finds either one or more | |||
452 | // functions or finds nothing. | |||
453 | // | |||
454 | // To keep our behavior consistent, we apply the "finds nothing" part in | |||
455 | // all language modes, and diagnose the empty lookup in ActOnCallExpr if we | |||
456 | // successfully form a call to an undeclared template-id. | |||
457 | bool AllFunctions = | |||
458 | getLangOpts().CPlusPlus2a && | |||
459 | std::all_of(Found.begin(), Found.end(), [](NamedDecl *ND) { | |||
460 | return isa<FunctionDecl>(ND->getUnderlyingDecl()); | |||
461 | }); | |||
462 | if (AllFunctions || (Found.empty() && !IsDependent)) { | |||
463 | // If lookup found any functions, or if this is a name that can only be | |||
464 | // used for a function, then strongly assume this is a function | |||
465 | // template-id. | |||
466 | *ATK = (Found.empty() && Found.getLookupName().isIdentifier()) | |||
467 | ? AssumedTemplateKind::FoundNothing | |||
468 | : AssumedTemplateKind::FoundFunctions; | |||
469 | Found.clear(); | |||
470 | return false; | |||
471 | } | |||
472 | } | |||
473 | ||||
474 | if (Found.empty() && !IsDependent) { | |||
475 | // If we did not find any names, attempt to correct any typos. | |||
476 | DeclarationName Name = Found.getLookupName(); | |||
477 | Found.clear(); | |||
478 | // Simple filter callback that, for keywords, only accepts the C++ *_cast | |||
479 | DefaultFilterCCC FilterCCC{}; | |||
480 | FilterCCC.WantTypeSpecifiers = false; | |||
481 | FilterCCC.WantExpressionKeywords = false; | |||
482 | FilterCCC.WantRemainingKeywords = false; | |||
483 | FilterCCC.WantCXXNamedCasts = true; | |||
484 | if (TypoCorrection Corrected = | |||
485 | CorrectTypo(Found.getLookupNameInfo(), Found.getLookupKind(), S, | |||
486 | &SS, FilterCCC, CTK_ErrorRecovery, LookupCtx)) { | |||
487 | if (auto *ND = Corrected.getFoundDecl()) | |||
488 | Found.addDecl(ND); | |||
489 | FilterAcceptableTemplateNames(Found); | |||
490 | if (Found.isAmbiguous()) { | |||
491 | Found.clear(); | |||
492 | } else if (!Found.empty()) { | |||
493 | Found.setLookupName(Corrected.getCorrection()); | |||
494 | if (LookupCtx) { | |||
495 | std::string CorrectedStr(Corrected.getAsString(getLangOpts())); | |||
496 | bool DroppedSpecifier = Corrected.WillReplaceSpecifier() && | |||
497 | Name.getAsString() == CorrectedStr; | |||
498 | diagnoseTypo(Corrected, PDiag(diag::err_no_member_template_suggest) | |||
499 | << Name << LookupCtx << DroppedSpecifier | |||
500 | << SS.getRange()); | |||
501 | } else { | |||
502 | diagnoseTypo(Corrected, PDiag(diag::err_no_template_suggest) << Name); | |||
503 | } | |||
504 | } | |||
505 | } | |||
506 | } | |||
507 | ||||
508 | NamedDecl *ExampleLookupResult = | |||
509 | Found.empty() ? nullptr : Found.getRepresentativeDecl(); | |||
510 | FilterAcceptableTemplateNames(Found, AllowFunctionTemplatesInLookup); | |||
511 | if (Found.empty()) { | |||
512 | if (IsDependent) { | |||
513 | MemberOfUnknownSpecialization = true; | |||
514 | return false; | |||
515 | } | |||
516 | ||||
517 | // If a 'template' keyword was used, a lookup that finds only non-template | |||
518 | // names is an error. | |||
519 | if (ExampleLookupResult && TemplateKWLoc.isValid()) { | |||
520 | Diag(Found.getNameLoc(), diag::err_template_kw_refers_to_non_template) | |||
521 | << Found.getLookupName() << SS.getRange(); | |||
522 | Diag(ExampleLookupResult->getUnderlyingDecl()->getLocation(), | |||
523 | diag::note_template_kw_refers_to_non_template) | |||
524 | << Found.getLookupName(); | |||
525 | return true; | |||
526 | } | |||
527 | ||||
528 | return false; | |||
529 | } | |||
530 | ||||
531 | if (S && !ObjectType.isNull() && !ObjectTypeSearchedInScope && | |||
532 | !getLangOpts().CPlusPlus11) { | |||
533 | // C++03 [basic.lookup.classref]p1: | |||
534 | // [...] If the lookup in the class of the object expression finds a | |||
535 | // template, the name is also looked up in the context of the entire | |||
536 | // postfix-expression and [...] | |||
537 | // | |||
538 | // Note: C++11 does not perform this second lookup. | |||
539 | LookupResult FoundOuter(*this, Found.getLookupName(), Found.getNameLoc(), | |||
540 | LookupOrdinaryName); | |||
541 | FoundOuter.setTemplateNameLookup(true); | |||
542 | LookupName(FoundOuter, S); | |||
543 | // FIXME: We silently accept an ambiguous lookup here, in violation of | |||
544 | // [basic.lookup]/1. | |||
545 | FilterAcceptableTemplateNames(FoundOuter, /*AllowFunctionTemplates=*/false); | |||
546 | ||||
547 | NamedDecl *OuterTemplate; | |||
548 | if (FoundOuter.empty()) { | |||
549 | // - if the name is not found, the name found in the class of the | |||
550 | // object expression is used, otherwise | |||
551 | } else if (FoundOuter.isAmbiguous() || !FoundOuter.isSingleResult() || | |||
552 | !(OuterTemplate = | |||
553 | getAsTemplateNameDecl(FoundOuter.getFoundDecl()))) { | |||
554 | // - if the name is found in the context of the entire | |||
555 | // postfix-expression and does not name a class template, the name | |||
556 | // found in the class of the object expression is used, otherwise | |||
557 | FoundOuter.clear(); | |||
558 | } else if (!Found.isSuppressingDiagnostics()) { | |||
559 | // - if the name found is a class template, it must refer to the same | |||
560 | // entity as the one found in the class of the object expression, | |||
561 | // otherwise the program is ill-formed. | |||
562 | if (!Found.isSingleResult() || | |||
563 | getAsTemplateNameDecl(Found.getFoundDecl())->getCanonicalDecl() != | |||
564 | OuterTemplate->getCanonicalDecl()) { | |||
565 | Diag(Found.getNameLoc(), | |||
566 | diag::ext_nested_name_member_ref_lookup_ambiguous) | |||
567 | << Found.getLookupName() | |||
568 | << ObjectType; | |||
569 | Diag(Found.getRepresentativeDecl()->getLocation(), | |||
570 | diag::note_ambig_member_ref_object_type) | |||
571 | << ObjectType; | |||
572 | Diag(FoundOuter.getFoundDecl()->getLocation(), | |||
573 | diag::note_ambig_member_ref_scope); | |||
574 | ||||
575 | // Recover by taking the template that we found in the object | |||
576 | // expression's type. | |||
577 | } | |||
578 | } | |||
579 | } | |||
580 | ||||
581 | return false; | |||
582 | } | |||
583 | ||||
584 | void Sema::diagnoseExprIntendedAsTemplateName(Scope *S, ExprResult TemplateName, | |||
585 | SourceLocation Less, | |||
586 | SourceLocation Greater) { | |||
587 | if (TemplateName.isInvalid()) | |||
588 | return; | |||
589 | ||||
590 | DeclarationNameInfo NameInfo; | |||
591 | CXXScopeSpec SS; | |||
592 | LookupNameKind LookupKind; | |||
593 | ||||
594 | DeclContext *LookupCtx = nullptr; | |||
595 | NamedDecl *Found = nullptr; | |||
596 | bool MissingTemplateKeyword = false; | |||
597 | ||||
598 | // Figure out what name we looked up. | |||
599 | if (auto *DRE = dyn_cast<DeclRefExpr>(TemplateName.get())) { | |||
600 | NameInfo = DRE->getNameInfo(); | |||
601 | SS.Adopt(DRE->getQualifierLoc()); | |||
602 | LookupKind = LookupOrdinaryName; | |||
603 | Found = DRE->getFoundDecl(); | |||
604 | } else if (auto *ME = dyn_cast<MemberExpr>(TemplateName.get())) { | |||
605 | NameInfo = ME->getMemberNameInfo(); | |||
606 | SS.Adopt(ME->getQualifierLoc()); | |||
607 | LookupKind = LookupMemberName; | |||
608 | LookupCtx = ME->getBase()->getType()->getAsCXXRecordDecl(); | |||
609 | Found = ME->getMemberDecl(); | |||
610 | } else if (auto *DSDRE = | |||
611 | dyn_cast<DependentScopeDeclRefExpr>(TemplateName.get())) { | |||
612 | NameInfo = DSDRE->getNameInfo(); | |||
613 | SS.Adopt(DSDRE->getQualifierLoc()); | |||
614 | MissingTemplateKeyword = true; | |||
615 | } else if (auto *DSME = | |||
616 | dyn_cast<CXXDependentScopeMemberExpr>(TemplateName.get())) { | |||
617 | NameInfo = DSME->getMemberNameInfo(); | |||
618 | SS.Adopt(DSME->getQualifierLoc()); | |||
619 | MissingTemplateKeyword = true; | |||
620 | } else { | |||
621 | llvm_unreachable("unexpected kind of potential template name")::llvm::llvm_unreachable_internal("unexpected kind of potential template name" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 621); | |||
622 | } | |||
623 | ||||
624 | // If this is a dependent-scope lookup, diagnose that the 'template' keyword | |||
625 | // was missing. | |||
626 | if (MissingTemplateKeyword) { | |||
627 | Diag(NameInfo.getBeginLoc(), diag::err_template_kw_missing) | |||
628 | << "" << NameInfo.getName().getAsString() << SourceRange(Less, Greater); | |||
629 | return; | |||
630 | } | |||
631 | ||||
632 | // Try to correct the name by looking for templates and C++ named casts. | |||
633 | struct TemplateCandidateFilter : CorrectionCandidateCallback { | |||
634 | Sema &S; | |||
635 | TemplateCandidateFilter(Sema &S) : S(S) { | |||
636 | WantTypeSpecifiers = false; | |||
637 | WantExpressionKeywords = false; | |||
638 | WantRemainingKeywords = false; | |||
639 | WantCXXNamedCasts = true; | |||
640 | }; | |||
641 | bool ValidateCandidate(const TypoCorrection &Candidate) override { | |||
642 | if (auto *ND = Candidate.getCorrectionDecl()) | |||
643 | return S.getAsTemplateNameDecl(ND); | |||
644 | return Candidate.isKeyword(); | |||
645 | } | |||
646 | ||||
647 | std::unique_ptr<CorrectionCandidateCallback> clone() override { | |||
648 | return std::make_unique<TemplateCandidateFilter>(*this); | |||
649 | } | |||
650 | }; | |||
651 | ||||
652 | DeclarationName Name = NameInfo.getName(); | |||
653 | TemplateCandidateFilter CCC(*this); | |||
654 | if (TypoCorrection Corrected = CorrectTypo(NameInfo, LookupKind, S, &SS, CCC, | |||
655 | CTK_ErrorRecovery, LookupCtx)) { | |||
656 | auto *ND = Corrected.getFoundDecl(); | |||
657 | if (ND) | |||
658 | ND = getAsTemplateNameDecl(ND); | |||
659 | if (ND || Corrected.isKeyword()) { | |||
660 | if (LookupCtx) { | |||
661 | std::string CorrectedStr(Corrected.getAsString(getLangOpts())); | |||
662 | bool DroppedSpecifier = Corrected.WillReplaceSpecifier() && | |||
663 | Name.getAsString() == CorrectedStr; | |||
664 | diagnoseTypo(Corrected, | |||
665 | PDiag(diag::err_non_template_in_member_template_id_suggest) | |||
666 | << Name << LookupCtx << DroppedSpecifier | |||
667 | << SS.getRange(), false); | |||
668 | } else { | |||
669 | diagnoseTypo(Corrected, | |||
670 | PDiag(diag::err_non_template_in_template_id_suggest) | |||
671 | << Name, false); | |||
672 | } | |||
673 | if (Found) | |||
674 | Diag(Found->getLocation(), | |||
675 | diag::note_non_template_in_template_id_found); | |||
676 | return; | |||
677 | } | |||
678 | } | |||
679 | ||||
680 | Diag(NameInfo.getLoc(), diag::err_non_template_in_template_id) | |||
681 | << Name << SourceRange(Less, Greater); | |||
682 | if (Found) | |||
683 | Diag(Found->getLocation(), diag::note_non_template_in_template_id_found); | |||
684 | } | |||
685 | ||||
686 | /// ActOnDependentIdExpression - Handle a dependent id-expression that | |||
687 | /// was just parsed. This is only possible with an explicit scope | |||
688 | /// specifier naming a dependent type. | |||
689 | ExprResult | |||
690 | Sema::ActOnDependentIdExpression(const CXXScopeSpec &SS, | |||
691 | SourceLocation TemplateKWLoc, | |||
692 | const DeclarationNameInfo &NameInfo, | |||
693 | bool isAddressOfOperand, | |||
694 | const TemplateArgumentListInfo *TemplateArgs) { | |||
695 | DeclContext *DC = getFunctionLevelDeclContext(); | |||
696 | ||||
697 | // C++11 [expr.prim.general]p12: | |||
698 | // An id-expression that denotes a non-static data member or non-static | |||
699 | // member function of a class can only be used: | |||
700 | // (...) | |||
701 | // - if that id-expression denotes a non-static data member and it | |||
702 | // appears in an unevaluated operand. | |||
703 | // | |||
704 | // If this might be the case, form a DependentScopeDeclRefExpr instead of a | |||
705 | // CXXDependentScopeMemberExpr. The former can instantiate to either | |||
706 | // DeclRefExpr or MemberExpr depending on lookup results, while the latter is | |||
707 | // always a MemberExpr. | |||
708 | bool MightBeCxx11UnevalField = | |||
709 | getLangOpts().CPlusPlus11 && isUnevaluatedContext(); | |||
710 | ||||
711 | // Check if the nested name specifier is an enum type. | |||
712 | bool IsEnum = false; | |||
713 | if (NestedNameSpecifier *NNS = SS.getScopeRep()) | |||
714 | IsEnum = dyn_cast_or_null<EnumType>(NNS->getAsType()); | |||
715 | ||||
716 | if (!MightBeCxx11UnevalField && !isAddressOfOperand && !IsEnum && | |||
717 | isa<CXXMethodDecl>(DC) && cast<CXXMethodDecl>(DC)->isInstance()) { | |||
718 | QualType ThisType = cast<CXXMethodDecl>(DC)->getThisType(); | |||
719 | ||||
720 | // Since the 'this' expression is synthesized, we don't need to | |||
721 | // perform the double-lookup check. | |||
722 | NamedDecl *FirstQualifierInScope = nullptr; | |||
723 | ||||
724 | return CXXDependentScopeMemberExpr::Create( | |||
725 | Context, /*This*/ nullptr, ThisType, /*IsArrow*/ true, | |||
726 | /*Op*/ SourceLocation(), SS.getWithLocInContext(Context), TemplateKWLoc, | |||
727 | FirstQualifierInScope, NameInfo, TemplateArgs); | |||
728 | } | |||
729 | ||||
730 | return BuildDependentDeclRefExpr(SS, TemplateKWLoc, NameInfo, TemplateArgs); | |||
731 | } | |||
732 | ||||
733 | ExprResult | |||
734 | Sema::BuildDependentDeclRefExpr(const CXXScopeSpec &SS, | |||
735 | SourceLocation TemplateKWLoc, | |||
736 | const DeclarationNameInfo &NameInfo, | |||
737 | const TemplateArgumentListInfo *TemplateArgs) { | |||
738 | // DependentScopeDeclRefExpr::Create requires a valid QualifierLoc | |||
739 | NestedNameSpecifierLoc QualifierLoc = SS.getWithLocInContext(Context); | |||
740 | if (!QualifierLoc) | |||
741 | return ExprError(); | |||
742 | ||||
743 | return DependentScopeDeclRefExpr::Create( | |||
744 | Context, QualifierLoc, TemplateKWLoc, NameInfo, TemplateArgs); | |||
745 | } | |||
746 | ||||
747 | ||||
748 | /// Determine whether we would be unable to instantiate this template (because | |||
749 | /// it either has no definition, or is in the process of being instantiated). | |||
750 | bool Sema::DiagnoseUninstantiableTemplate(SourceLocation PointOfInstantiation, | |||
751 | NamedDecl *Instantiation, | |||
752 | bool InstantiatedFromMember, | |||
753 | const NamedDecl *Pattern, | |||
754 | const NamedDecl *PatternDef, | |||
755 | TemplateSpecializationKind TSK, | |||
756 | bool Complain /*= true*/) { | |||
757 | assert(isa<TagDecl>(Instantiation) || isa<FunctionDecl>(Instantiation) ||((isa<TagDecl>(Instantiation) || isa<FunctionDecl> (Instantiation) || isa<VarDecl>(Instantiation)) ? static_cast <void> (0) : __assert_fail ("isa<TagDecl>(Instantiation) || isa<FunctionDecl>(Instantiation) || isa<VarDecl>(Instantiation)" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 758, __PRETTY_FUNCTION__)) | |||
758 | isa<VarDecl>(Instantiation))((isa<TagDecl>(Instantiation) || isa<FunctionDecl> (Instantiation) || isa<VarDecl>(Instantiation)) ? static_cast <void> (0) : __assert_fail ("isa<TagDecl>(Instantiation) || isa<FunctionDecl>(Instantiation) || isa<VarDecl>(Instantiation)" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 758, __PRETTY_FUNCTION__)); | |||
759 | ||||
760 | bool IsEntityBeingDefined = false; | |||
761 | if (const TagDecl *TD = dyn_cast_or_null<TagDecl>(PatternDef)) | |||
762 | IsEntityBeingDefined = TD->isBeingDefined(); | |||
763 | ||||
764 | if (PatternDef && !IsEntityBeingDefined) { | |||
765 | NamedDecl *SuggestedDef = nullptr; | |||
766 | if (!hasVisibleDefinition(const_cast<NamedDecl*>(PatternDef), &SuggestedDef, | |||
767 | /*OnlyNeedComplete*/false)) { | |||
768 | // If we're allowed to diagnose this and recover, do so. | |||
769 | bool Recover = Complain && !isSFINAEContext(); | |||
770 | if (Complain) | |||
771 | diagnoseMissingImport(PointOfInstantiation, SuggestedDef, | |||
772 | Sema::MissingImportKind::Definition, Recover); | |||
773 | return !Recover; | |||
774 | } | |||
775 | return false; | |||
776 | } | |||
777 | ||||
778 | if (!Complain || (PatternDef && PatternDef->isInvalidDecl())) | |||
779 | return true; | |||
780 | ||||
781 | llvm::Optional<unsigned> Note; | |||
782 | QualType InstantiationTy; | |||
783 | if (TagDecl *TD = dyn_cast<TagDecl>(Instantiation)) | |||
784 | InstantiationTy = Context.getTypeDeclType(TD); | |||
785 | if (PatternDef) { | |||
786 | Diag(PointOfInstantiation, | |||
787 | diag::err_template_instantiate_within_definition) | |||
788 | << /*implicit|explicit*/(TSK != TSK_ImplicitInstantiation) | |||
789 | << InstantiationTy; | |||
790 | // Not much point in noting the template declaration here, since | |||
791 | // we're lexically inside it. | |||
792 | Instantiation->setInvalidDecl(); | |||
793 | } else if (InstantiatedFromMember) { | |||
794 | if (isa<FunctionDecl>(Instantiation)) { | |||
795 | Diag(PointOfInstantiation, | |||
796 | diag::err_explicit_instantiation_undefined_member) | |||
797 | << /*member function*/ 1 << Instantiation->getDeclName() | |||
798 | << Instantiation->getDeclContext(); | |||
799 | Note = diag::note_explicit_instantiation_here; | |||
800 | } else { | |||
801 | assert(isa<TagDecl>(Instantiation) && "Must be a TagDecl!")((isa<TagDecl>(Instantiation) && "Must be a TagDecl!" ) ? static_cast<void> (0) : __assert_fail ("isa<TagDecl>(Instantiation) && \"Must be a TagDecl!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 801, __PRETTY_FUNCTION__)); | |||
802 | Diag(PointOfInstantiation, | |||
803 | diag::err_implicit_instantiate_member_undefined) | |||
804 | << InstantiationTy; | |||
805 | Note = diag::note_member_declared_at; | |||
806 | } | |||
807 | } else { | |||
808 | if (isa<FunctionDecl>(Instantiation)) { | |||
809 | Diag(PointOfInstantiation, | |||
810 | diag::err_explicit_instantiation_undefined_func_template) | |||
811 | << Pattern; | |||
812 | Note = diag::note_explicit_instantiation_here; | |||
813 | } else if (isa<TagDecl>(Instantiation)) { | |||
814 | Diag(PointOfInstantiation, diag::err_template_instantiate_undefined) | |||
815 | << (TSK != TSK_ImplicitInstantiation) | |||
816 | << InstantiationTy; | |||
817 | Note = diag::note_template_decl_here; | |||
818 | } else { | |||
819 | assert(isa<VarDecl>(Instantiation) && "Must be a VarDecl!")((isa<VarDecl>(Instantiation) && "Must be a VarDecl!" ) ? static_cast<void> (0) : __assert_fail ("isa<VarDecl>(Instantiation) && \"Must be a VarDecl!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 819, __PRETTY_FUNCTION__)); | |||
820 | if (isa<VarTemplateSpecializationDecl>(Instantiation)) { | |||
821 | Diag(PointOfInstantiation, | |||
822 | diag::err_explicit_instantiation_undefined_var_template) | |||
823 | << Instantiation; | |||
824 | Instantiation->setInvalidDecl(); | |||
825 | } else | |||
826 | Diag(PointOfInstantiation, | |||
827 | diag::err_explicit_instantiation_undefined_member) | |||
828 | << /*static data member*/ 2 << Instantiation->getDeclName() | |||
829 | << Instantiation->getDeclContext(); | |||
830 | Note = diag::note_explicit_instantiation_here; | |||
831 | } | |||
832 | } | |||
833 | if (Note) // Diagnostics were emitted. | |||
834 | Diag(Pattern->getLocation(), Note.getValue()); | |||
835 | ||||
836 | // In general, Instantiation isn't marked invalid to get more than one | |||
837 | // error for multiple undefined instantiations. But the code that does | |||
838 | // explicit declaration -> explicit definition conversion can't handle | |||
839 | // invalid declarations, so mark as invalid in that case. | |||
840 | if (TSK == TSK_ExplicitInstantiationDeclaration) | |||
841 | Instantiation->setInvalidDecl(); | |||
842 | return true; | |||
843 | } | |||
844 | ||||
845 | /// DiagnoseTemplateParameterShadow - Produce a diagnostic complaining | |||
846 | /// that the template parameter 'PrevDecl' is being shadowed by a new | |||
847 | /// declaration at location Loc. Returns true to indicate that this is | |||
848 | /// an error, and false otherwise. | |||
849 | void Sema::DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl) { | |||
850 | assert(PrevDecl->isTemplateParameter() && "Not a template parameter")((PrevDecl->isTemplateParameter() && "Not a template parameter" ) ? static_cast<void> (0) : __assert_fail ("PrevDecl->isTemplateParameter() && \"Not a template parameter\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 850, __PRETTY_FUNCTION__)); | |||
851 | ||||
852 | // C++ [temp.local]p4: | |||
853 | // A template-parameter shall not be redeclared within its | |||
854 | // scope (including nested scopes). | |||
855 | // | |||
856 | // Make this a warning when MSVC compatibility is requested. | |||
857 | unsigned DiagId = getLangOpts().MSVCCompat ? diag::ext_template_param_shadow | |||
858 | : diag::err_template_param_shadow; | |||
859 | Diag(Loc, DiagId) << cast<NamedDecl>(PrevDecl)->getDeclName(); | |||
860 | Diag(PrevDecl->getLocation(), diag::note_template_param_here); | |||
861 | } | |||
862 | ||||
863 | /// AdjustDeclIfTemplate - If the given decl happens to be a template, reset | |||
864 | /// the parameter D to reference the templated declaration and return a pointer | |||
865 | /// to the template declaration. Otherwise, do nothing to D and return null. | |||
866 | TemplateDecl *Sema::AdjustDeclIfTemplate(Decl *&D) { | |||
867 | if (TemplateDecl *Temp = dyn_cast_or_null<TemplateDecl>(D)) { | |||
868 | D = Temp->getTemplatedDecl(); | |||
869 | return Temp; | |||
870 | } | |||
871 | return nullptr; | |||
872 | } | |||
873 | ||||
874 | ParsedTemplateArgument ParsedTemplateArgument::getTemplatePackExpansion( | |||
875 | SourceLocation EllipsisLoc) const { | |||
876 | assert(Kind == Template &&((Kind == Template && "Only template template arguments can be pack expansions here" ) ? static_cast<void> (0) : __assert_fail ("Kind == Template && \"Only template template arguments can be pack expansions here\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 877, __PRETTY_FUNCTION__)) | |||
877 | "Only template template arguments can be pack expansions here")((Kind == Template && "Only template template arguments can be pack expansions here" ) ? static_cast<void> (0) : __assert_fail ("Kind == Template && \"Only template template arguments can be pack expansions here\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 877, __PRETTY_FUNCTION__)); | |||
878 | assert(getAsTemplate().get().containsUnexpandedParameterPack() &&((getAsTemplate().get().containsUnexpandedParameterPack() && "Template template argument pack expansion without packs") ? static_cast<void> (0) : __assert_fail ("getAsTemplate().get().containsUnexpandedParameterPack() && \"Template template argument pack expansion without packs\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 879, __PRETTY_FUNCTION__)) | |||
879 | "Template template argument pack expansion without packs")((getAsTemplate().get().containsUnexpandedParameterPack() && "Template template argument pack expansion without packs") ? static_cast<void> (0) : __assert_fail ("getAsTemplate().get().containsUnexpandedParameterPack() && \"Template template argument pack expansion without packs\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 879, __PRETTY_FUNCTION__)); | |||
880 | ParsedTemplateArgument Result(*this); | |||
881 | Result.EllipsisLoc = EllipsisLoc; | |||
882 | return Result; | |||
883 | } | |||
884 | ||||
885 | static TemplateArgumentLoc translateTemplateArgument(Sema &SemaRef, | |||
886 | const ParsedTemplateArgument &Arg) { | |||
887 | ||||
888 | switch (Arg.getKind()) { | |||
889 | case ParsedTemplateArgument::Type: { | |||
890 | TypeSourceInfo *DI; | |||
891 | QualType T = SemaRef.GetTypeFromParser(Arg.getAsType(), &DI); | |||
892 | if (!DI) | |||
893 | DI = SemaRef.Context.getTrivialTypeSourceInfo(T, Arg.getLocation()); | |||
894 | return TemplateArgumentLoc(TemplateArgument(T), DI); | |||
895 | } | |||
896 | ||||
897 | case ParsedTemplateArgument::NonType: { | |||
898 | Expr *E = static_cast<Expr *>(Arg.getAsExpr()); | |||
899 | return TemplateArgumentLoc(TemplateArgument(E), E); | |||
900 | } | |||
901 | ||||
902 | case ParsedTemplateArgument::Template: { | |||
903 | TemplateName Template = Arg.getAsTemplate().get(); | |||
904 | TemplateArgument TArg; | |||
905 | if (Arg.getEllipsisLoc().isValid()) | |||
906 | TArg = TemplateArgument(Template, Optional<unsigned int>()); | |||
907 | else | |||
908 | TArg = Template; | |||
909 | return TemplateArgumentLoc(TArg, | |||
910 | Arg.getScopeSpec().getWithLocInContext( | |||
911 | SemaRef.Context), | |||
912 | Arg.getLocation(), | |||
913 | Arg.getEllipsisLoc()); | |||
914 | } | |||
915 | } | |||
916 | ||||
917 | llvm_unreachable("Unhandled parsed template argument")::llvm::llvm_unreachable_internal("Unhandled parsed template argument" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 917); | |||
918 | } | |||
919 | ||||
920 | /// Translates template arguments as provided by the parser | |||
921 | /// into template arguments used by semantic analysis. | |||
922 | void Sema::translateTemplateArguments(const ASTTemplateArgsPtr &TemplateArgsIn, | |||
923 | TemplateArgumentListInfo &TemplateArgs) { | |||
924 | for (unsigned I = 0, Last = TemplateArgsIn.size(); I != Last; ++I) | |||
925 | TemplateArgs.addArgument(translateTemplateArgument(*this, | |||
926 | TemplateArgsIn[I])); | |||
927 | } | |||
928 | ||||
929 | static void maybeDiagnoseTemplateParameterShadow(Sema &SemaRef, Scope *S, | |||
930 | SourceLocation Loc, | |||
931 | IdentifierInfo *Name) { | |||
932 | NamedDecl *PrevDecl = SemaRef.LookupSingleName( | |||
933 | S, Name, Loc, Sema::LookupOrdinaryName, Sema::ForVisibleRedeclaration); | |||
934 | if (PrevDecl && PrevDecl->isTemplateParameter()) | |||
935 | SemaRef.DiagnoseTemplateParameterShadow(Loc, PrevDecl); | |||
936 | } | |||
937 | ||||
938 | /// Convert a parsed type into a parsed template argument. This is mostly | |||
939 | /// trivial, except that we may have parsed a C++17 deduced class template | |||
940 | /// specialization type, in which case we should form a template template | |||
941 | /// argument instead of a type template argument. | |||
942 | ParsedTemplateArgument Sema::ActOnTemplateTypeArgument(TypeResult ParsedType) { | |||
943 | TypeSourceInfo *TInfo; | |||
944 | QualType T = GetTypeFromParser(ParsedType.get(), &TInfo); | |||
945 | if (T.isNull()) | |||
946 | return ParsedTemplateArgument(); | |||
947 | assert(TInfo && "template argument with no location")((TInfo && "template argument with no location") ? static_cast <void> (0) : __assert_fail ("TInfo && \"template argument with no location\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 947, __PRETTY_FUNCTION__)); | |||
948 | ||||
949 | // If we might have formed a deduced template specialization type, convert | |||
950 | // it to a template template argument. | |||
951 | if (getLangOpts().CPlusPlus17) { | |||
952 | TypeLoc TL = TInfo->getTypeLoc(); | |||
953 | SourceLocation EllipsisLoc; | |||
954 | if (auto PET = TL.getAs<PackExpansionTypeLoc>()) { | |||
955 | EllipsisLoc = PET.getEllipsisLoc(); | |||
956 | TL = PET.getPatternLoc(); | |||
957 | } | |||
958 | ||||
959 | CXXScopeSpec SS; | |||
960 | if (auto ET = TL.getAs<ElaboratedTypeLoc>()) { | |||
961 | SS.Adopt(ET.getQualifierLoc()); | |||
962 | TL = ET.getNamedTypeLoc(); | |||
963 | } | |||
964 | ||||
965 | if (auto DTST = TL.getAs<DeducedTemplateSpecializationTypeLoc>()) { | |||
966 | TemplateName Name = DTST.getTypePtr()->getTemplateName(); | |||
967 | if (SS.isSet()) | |||
968 | Name = Context.getQualifiedTemplateName(SS.getScopeRep(), | |||
969 | /*HasTemplateKeyword*/ false, | |||
970 | Name.getAsTemplateDecl()); | |||
971 | ParsedTemplateArgument Result(SS, TemplateTy::make(Name), | |||
972 | DTST.getTemplateNameLoc()); | |||
973 | if (EllipsisLoc.isValid()) | |||
974 | Result = Result.getTemplatePackExpansion(EllipsisLoc); | |||
975 | return Result; | |||
976 | } | |||
977 | } | |||
978 | ||||
979 | // This is a normal type template argument. Note, if the type template | |||
980 | // argument is an injected-class-name for a template, it has a dual nature | |||
981 | // and can be used as either a type or a template. We handle that in | |||
982 | // convertTypeTemplateArgumentToTemplate. | |||
983 | return ParsedTemplateArgument(ParsedTemplateArgument::Type, | |||
984 | ParsedType.get().getAsOpaquePtr(), | |||
985 | TInfo->getTypeLoc().getBeginLoc()); | |||
986 | } | |||
987 | ||||
988 | /// ActOnTypeParameter - Called when a C++ template type parameter | |||
989 | /// (e.g., "typename T") has been parsed. Typename specifies whether | |||
990 | /// the keyword "typename" was used to declare the type parameter | |||
991 | /// (otherwise, "class" was used), and KeyLoc is the location of the | |||
992 | /// "class" or "typename" keyword. ParamName is the name of the | |||
993 | /// parameter (NULL indicates an unnamed template parameter) and | |||
994 | /// ParamNameLoc is the location of the parameter name (if any). | |||
995 | /// If the type parameter has a default argument, it will be added | |||
996 | /// later via ActOnTypeParameterDefault. | |||
997 | NamedDecl *Sema::ActOnTypeParameter(Scope *S, bool Typename, | |||
998 | SourceLocation EllipsisLoc, | |||
999 | SourceLocation KeyLoc, | |||
1000 | IdentifierInfo *ParamName, | |||
1001 | SourceLocation ParamNameLoc, | |||
1002 | unsigned Depth, unsigned Position, | |||
1003 | SourceLocation EqualLoc, | |||
1004 | ParsedType DefaultArg) { | |||
1005 | assert(S->isTemplateParamScope() &&((S->isTemplateParamScope() && "Template type parameter not in template parameter scope!" ) ? static_cast<void> (0) : __assert_fail ("S->isTemplateParamScope() && \"Template type parameter not in template parameter scope!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 1006, __PRETTY_FUNCTION__)) | |||
1006 | "Template type parameter not in template parameter scope!")((S->isTemplateParamScope() && "Template type parameter not in template parameter scope!" ) ? static_cast<void> (0) : __assert_fail ("S->isTemplateParamScope() && \"Template type parameter not in template parameter scope!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 1006, __PRETTY_FUNCTION__)); | |||
1007 | ||||
1008 | bool IsParameterPack = EllipsisLoc.isValid(); | |||
1009 | TemplateTypeParmDecl *Param = TemplateTypeParmDecl::Create( | |||
1010 | Context, Context.getTranslationUnitDecl(), KeyLoc, ParamNameLoc, Depth, | |||
1011 | Position, ParamName, Typename, IsParameterPack); | |||
1012 | Param->setAccess(AS_public); | |||
1013 | ||||
1014 | if (Param->isParameterPack()) | |||
1015 | if (auto *LSI = getEnclosingLambda()) | |||
1016 | LSI->LocalPacks.push_back(Param); | |||
1017 | ||||
1018 | if (ParamName) { | |||
1019 | maybeDiagnoseTemplateParameterShadow(*this, S, ParamNameLoc, ParamName); | |||
1020 | ||||
1021 | // Add the template parameter into the current scope. | |||
1022 | S->AddDecl(Param); | |||
1023 | IdResolver.AddDecl(Param); | |||
1024 | } | |||
1025 | ||||
1026 | // C++0x [temp.param]p9: | |||
1027 | // A default template-argument may be specified for any kind of | |||
1028 | // template-parameter that is not a template parameter pack. | |||
1029 | if (DefaultArg && IsParameterPack) { | |||
1030 | Diag(EqualLoc, diag::err_template_param_pack_default_arg); | |||
1031 | DefaultArg = nullptr; | |||
1032 | } | |||
1033 | ||||
1034 | // Handle the default argument, if provided. | |||
1035 | if (DefaultArg) { | |||
1036 | TypeSourceInfo *DefaultTInfo; | |||
1037 | GetTypeFromParser(DefaultArg, &DefaultTInfo); | |||
1038 | ||||
1039 | assert(DefaultTInfo && "expected source information for type")((DefaultTInfo && "expected source information for type" ) ? static_cast<void> (0) : __assert_fail ("DefaultTInfo && \"expected source information for type\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 1039, __PRETTY_FUNCTION__)); | |||
1040 | ||||
1041 | // Check for unexpanded parameter packs. | |||
1042 | if (DiagnoseUnexpandedParameterPack(ParamNameLoc, DefaultTInfo, | |||
1043 | UPPC_DefaultArgument)) | |||
1044 | return Param; | |||
1045 | ||||
1046 | // Check the template argument itself. | |||
1047 | if (CheckTemplateArgument(Param, DefaultTInfo)) { | |||
1048 | Param->setInvalidDecl(); | |||
1049 | return Param; | |||
1050 | } | |||
1051 | ||||
1052 | Param->setDefaultArgument(DefaultTInfo); | |||
1053 | } | |||
1054 | ||||
1055 | return Param; | |||
1056 | } | |||
1057 | ||||
1058 | /// Check that the type of a non-type template parameter is | |||
1059 | /// well-formed. | |||
1060 | /// | |||
1061 | /// \returns the (possibly-promoted) parameter type if valid; | |||
1062 | /// otherwise, produces a diagnostic and returns a NULL type. | |||
1063 | QualType Sema::CheckNonTypeTemplateParameterType(TypeSourceInfo *&TSI, | |||
1064 | SourceLocation Loc) { | |||
1065 | if (TSI->getType()->isUndeducedType()) { | |||
1066 | // C++17 [temp.dep.expr]p3: | |||
1067 | // An id-expression is type-dependent if it contains | |||
1068 | // - an identifier associated by name lookup with a non-type | |||
1069 | // template-parameter declared with a type that contains a | |||
1070 | // placeholder type (7.1.7.4), | |||
1071 | TSI = SubstAutoTypeSourceInfo(TSI, Context.DependentTy); | |||
1072 | } | |||
1073 | ||||
1074 | return CheckNonTypeTemplateParameterType(TSI->getType(), Loc); | |||
1075 | } | |||
1076 | ||||
1077 | QualType Sema::CheckNonTypeTemplateParameterType(QualType T, | |||
1078 | SourceLocation Loc) { | |||
1079 | // We don't allow variably-modified types as the type of non-type template | |||
1080 | // parameters. | |||
1081 | if (T->isVariablyModifiedType()) { | |||
1082 | Diag(Loc, diag::err_variably_modified_nontype_template_param) | |||
1083 | << T; | |||
1084 | return QualType(); | |||
1085 | } | |||
1086 | ||||
1087 | // C++ [temp.param]p4: | |||
1088 | // | |||
1089 | // A non-type template-parameter shall have one of the following | |||
1090 | // (optionally cv-qualified) types: | |||
1091 | // | |||
1092 | // -- integral or enumeration type, | |||
1093 | if (T->isIntegralOrEnumerationType() || | |||
1094 | // -- pointer to object or pointer to function, | |||
1095 | T->isPointerType() || | |||
1096 | // -- reference to object or reference to function, | |||
1097 | T->isReferenceType() || | |||
1098 | // -- pointer to member, | |||
1099 | T->isMemberPointerType() || | |||
1100 | // -- std::nullptr_t. | |||
1101 | T->isNullPtrType() || | |||
1102 | // If T is a dependent type, we can't do the check now, so we | |||
1103 | // assume that it is well-formed. | |||
1104 | T->isDependentType() || | |||
1105 | // Allow use of auto in template parameter declarations. | |||
1106 | T->isUndeducedType()) { | |||
1107 | // C++ [temp.param]p5: The top-level cv-qualifiers on the template-parameter | |||
1108 | // are ignored when determining its type. | |||
1109 | return T.getUnqualifiedType(); | |||
1110 | } | |||
1111 | ||||
1112 | // C++ [temp.param]p8: | |||
1113 | // | |||
1114 | // A non-type template-parameter of type "array of T" or | |||
1115 | // "function returning T" is adjusted to be of type "pointer to | |||
1116 | // T" or "pointer to function returning T", respectively. | |||
1117 | else if (T->isArrayType() || T->isFunctionType()) | |||
1118 | return Context.getDecayedType(T); | |||
1119 | ||||
1120 | Diag(Loc, diag::err_template_nontype_parm_bad_type) | |||
1121 | << T; | |||
1122 | ||||
1123 | return QualType(); | |||
1124 | } | |||
1125 | ||||
1126 | NamedDecl *Sema::ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, | |||
1127 | unsigned Depth, | |||
1128 | unsigned Position, | |||
1129 | SourceLocation EqualLoc, | |||
1130 | Expr *Default) { | |||
1131 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | |||
1132 | ||||
1133 | // Check that we have valid decl-specifiers specified. | |||
1134 | auto CheckValidDeclSpecifiers = [this, &D] { | |||
1135 | // C++ [temp.param] | |||
1136 | // p1 | |||
1137 | // template-parameter: | |||
1138 | // ... | |||
1139 | // parameter-declaration | |||
1140 | // p2 | |||
1141 | // ... A storage class shall not be specified in a template-parameter | |||
1142 | // declaration. | |||
1143 | // [dcl.typedef]p1: | |||
1144 | // The typedef specifier [...] shall not be used in the decl-specifier-seq | |||
1145 | // of a parameter-declaration | |||
1146 | const DeclSpec &DS = D.getDeclSpec(); | |||
1147 | auto EmitDiag = [this](SourceLocation Loc) { | |||
1148 | Diag(Loc, diag::err_invalid_decl_specifier_in_nontype_parm) | |||
1149 | << FixItHint::CreateRemoval(Loc); | |||
1150 | }; | |||
1151 | if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified) | |||
1152 | EmitDiag(DS.getStorageClassSpecLoc()); | |||
1153 | ||||
1154 | if (DS.getThreadStorageClassSpec() != TSCS_unspecified) | |||
1155 | EmitDiag(DS.getThreadStorageClassSpecLoc()); | |||
1156 | ||||
1157 | // [dcl.inline]p1: | |||
1158 | // The inline specifier can be applied only to the declaration or | |||
1159 | // definition of a variable or function. | |||
1160 | ||||
1161 | if (DS.isInlineSpecified()) | |||
1162 | EmitDiag(DS.getInlineSpecLoc()); | |||
1163 | ||||
1164 | // [dcl.constexpr]p1: | |||
1165 | // The constexpr specifier shall be applied only to the definition of a | |||
1166 | // variable or variable template or the declaration of a function or | |||
1167 | // function template. | |||
1168 | ||||
1169 | if (DS.hasConstexprSpecifier()) | |||
1170 | EmitDiag(DS.getConstexprSpecLoc()); | |||
1171 | ||||
1172 | // [dcl.fct.spec]p1: | |||
1173 | // Function-specifiers can be used only in function declarations. | |||
1174 | ||||
1175 | if (DS.isVirtualSpecified()) | |||
1176 | EmitDiag(DS.getVirtualSpecLoc()); | |||
1177 | ||||
1178 | if (DS.hasExplicitSpecifier()) | |||
1179 | EmitDiag(DS.getExplicitSpecLoc()); | |||
1180 | ||||
1181 | if (DS.isNoreturnSpecified()) | |||
1182 | EmitDiag(DS.getNoreturnSpecLoc()); | |||
1183 | }; | |||
1184 | ||||
1185 | CheckValidDeclSpecifiers(); | |||
1186 | ||||
1187 | if (TInfo->getType()->isUndeducedType()) { | |||
1188 | Diag(D.getIdentifierLoc(), | |||
1189 | diag::warn_cxx14_compat_template_nontype_parm_auto_type) | |||
1190 | << QualType(TInfo->getType()->getContainedAutoType(), 0); | |||
1191 | } | |||
1192 | ||||
1193 | assert(S->isTemplateParamScope() &&((S->isTemplateParamScope() && "Non-type template parameter not in template parameter scope!" ) ? static_cast<void> (0) : __assert_fail ("S->isTemplateParamScope() && \"Non-type template parameter not in template parameter scope!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 1194, __PRETTY_FUNCTION__)) | |||
1194 | "Non-type template parameter not in template parameter scope!")((S->isTemplateParamScope() && "Non-type template parameter not in template parameter scope!" ) ? static_cast<void> (0) : __assert_fail ("S->isTemplateParamScope() && \"Non-type template parameter not in template parameter scope!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 1194, __PRETTY_FUNCTION__)); | |||
1195 | bool Invalid = false; | |||
1196 | ||||
1197 | QualType T = CheckNonTypeTemplateParameterType(TInfo, D.getIdentifierLoc()); | |||
1198 | if (T.isNull()) { | |||
1199 | T = Context.IntTy; // Recover with an 'int' type. | |||
1200 | Invalid = true; | |||
1201 | } | |||
1202 | ||||
1203 | CheckFunctionOrTemplateParamDeclarator(S, D); | |||
1204 | ||||
1205 | IdentifierInfo *ParamName = D.getIdentifier(); | |||
1206 | bool IsParameterPack = D.hasEllipsis(); | |||
1207 | NonTypeTemplateParmDecl *Param = NonTypeTemplateParmDecl::Create( | |||
1208 | Context, Context.getTranslationUnitDecl(), D.getBeginLoc(), | |||
1209 | D.getIdentifierLoc(), Depth, Position, ParamName, T, IsParameterPack, | |||
1210 | TInfo); | |||
1211 | Param->setAccess(AS_public); | |||
1212 | ||||
1213 | if (Invalid) | |||
1214 | Param->setInvalidDecl(); | |||
1215 | ||||
1216 | if (Param->isParameterPack()) | |||
1217 | if (auto *LSI = getEnclosingLambda()) | |||
1218 | LSI->LocalPacks.push_back(Param); | |||
1219 | ||||
1220 | if (ParamName) { | |||
1221 | maybeDiagnoseTemplateParameterShadow(*this, S, D.getIdentifierLoc(), | |||
1222 | ParamName); | |||
1223 | ||||
1224 | // Add the template parameter into the current scope. | |||
1225 | S->AddDecl(Param); | |||
1226 | IdResolver.AddDecl(Param); | |||
1227 | } | |||
1228 | ||||
1229 | // C++0x [temp.param]p9: | |||
1230 | // A default template-argument may be specified for any kind of | |||
1231 | // template-parameter that is not a template parameter pack. | |||
1232 | if (Default && IsParameterPack) { | |||
1233 | Diag(EqualLoc, diag::err_template_param_pack_default_arg); | |||
1234 | Default = nullptr; | |||
1235 | } | |||
1236 | ||||
1237 | // Check the well-formedness of the default template argument, if provided. | |||
1238 | if (Default) { | |||
1239 | // Check for unexpanded parameter packs. | |||
1240 | if (DiagnoseUnexpandedParameterPack(Default, UPPC_DefaultArgument)) | |||
1241 | return Param; | |||
1242 | ||||
1243 | TemplateArgument Converted; | |||
1244 | ExprResult DefaultRes = | |||
1245 | CheckTemplateArgument(Param, Param->getType(), Default, Converted); | |||
1246 | if (DefaultRes.isInvalid()) { | |||
1247 | Param->setInvalidDecl(); | |||
1248 | return Param; | |||
1249 | } | |||
1250 | Default = DefaultRes.get(); | |||
1251 | ||||
1252 | Param->setDefaultArgument(Default); | |||
1253 | } | |||
1254 | ||||
1255 | return Param; | |||
1256 | } | |||
1257 | ||||
1258 | /// ActOnTemplateTemplateParameter - Called when a C++ template template | |||
1259 | /// parameter (e.g. T in template <template \<typename> class T> class array) | |||
1260 | /// has been parsed. S is the current scope. | |||
1261 | NamedDecl *Sema::ActOnTemplateTemplateParameter(Scope* S, | |||
1262 | SourceLocation TmpLoc, | |||
1263 | TemplateParameterList *Params, | |||
1264 | SourceLocation EllipsisLoc, | |||
1265 | IdentifierInfo *Name, | |||
1266 | SourceLocation NameLoc, | |||
1267 | unsigned Depth, | |||
1268 | unsigned Position, | |||
1269 | SourceLocation EqualLoc, | |||
1270 | ParsedTemplateArgument Default) { | |||
1271 | assert(S->isTemplateParamScope() &&((S->isTemplateParamScope() && "Template template parameter not in template parameter scope!" ) ? static_cast<void> (0) : __assert_fail ("S->isTemplateParamScope() && \"Template template parameter not in template parameter scope!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 1272, __PRETTY_FUNCTION__)) | |||
1272 | "Template template parameter not in template parameter scope!")((S->isTemplateParamScope() && "Template template parameter not in template parameter scope!" ) ? static_cast<void> (0) : __assert_fail ("S->isTemplateParamScope() && \"Template template parameter not in template parameter scope!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 1272, __PRETTY_FUNCTION__)); | |||
1273 | ||||
1274 | // Construct the parameter object. | |||
1275 | bool IsParameterPack = EllipsisLoc.isValid(); | |||
1276 | TemplateTemplateParmDecl *Param = | |||
1277 | TemplateTemplateParmDecl::Create(Context, Context.getTranslationUnitDecl(), | |||
1278 | NameLoc.isInvalid()? TmpLoc : NameLoc, | |||
1279 | Depth, Position, IsParameterPack, | |||
1280 | Name, Params); | |||
1281 | Param->setAccess(AS_public); | |||
1282 | ||||
1283 | if (Param->isParameterPack()) | |||
1284 | if (auto *LSI = getEnclosingLambda()) | |||
1285 | LSI->LocalPacks.push_back(Param); | |||
1286 | ||||
1287 | // If the template template parameter has a name, then link the identifier | |||
1288 | // into the scope and lookup mechanisms. | |||
1289 | if (Name) { | |||
1290 | maybeDiagnoseTemplateParameterShadow(*this, S, NameLoc, Name); | |||
1291 | ||||
1292 | S->AddDecl(Param); | |||
1293 | IdResolver.AddDecl(Param); | |||
1294 | } | |||
1295 | ||||
1296 | if (Params->size() == 0) { | |||
1297 | Diag(Param->getLocation(), diag::err_template_template_parm_no_parms) | |||
1298 | << SourceRange(Params->getLAngleLoc(), Params->getRAngleLoc()); | |||
1299 | Param->setInvalidDecl(); | |||
1300 | } | |||
1301 | ||||
1302 | // C++0x [temp.param]p9: | |||
1303 | // A default template-argument may be specified for any kind of | |||
1304 | // template-parameter that is not a template parameter pack. | |||
1305 | if (IsParameterPack && !Default.isInvalid()) { | |||
1306 | Diag(EqualLoc, diag::err_template_param_pack_default_arg); | |||
1307 | Default = ParsedTemplateArgument(); | |||
1308 | } | |||
1309 | ||||
1310 | if (!Default.isInvalid()) { | |||
1311 | // Check only that we have a template template argument. We don't want to | |||
1312 | // try to check well-formedness now, because our template template parameter | |||
1313 | // might have dependent types in its template parameters, which we wouldn't | |||
1314 | // be able to match now. | |||
1315 | // | |||
1316 | // If none of the template template parameter's template arguments mention | |||
1317 | // other template parameters, we could actually perform more checking here. | |||
1318 | // However, it isn't worth doing. | |||
1319 | TemplateArgumentLoc DefaultArg = translateTemplateArgument(*this, Default); | |||
1320 | if (DefaultArg.getArgument().getAsTemplate().isNull()) { | |||
1321 | Diag(DefaultArg.getLocation(), diag::err_template_arg_not_valid_template) | |||
1322 | << DefaultArg.getSourceRange(); | |||
1323 | return Param; | |||
1324 | } | |||
1325 | ||||
1326 | // Check for unexpanded parameter packs. | |||
1327 | if (DiagnoseUnexpandedParameterPack(DefaultArg.getLocation(), | |||
1328 | DefaultArg.getArgument().getAsTemplate(), | |||
1329 | UPPC_DefaultArgument)) | |||
1330 | return Param; | |||
1331 | ||||
1332 | Param->setDefaultArgument(Context, DefaultArg); | |||
1333 | } | |||
1334 | ||||
1335 | return Param; | |||
1336 | } | |||
1337 | ||||
1338 | /// ActOnTemplateParameterList - Builds a TemplateParameterList, optionally | |||
1339 | /// constrained by RequiresClause, that contains the template parameters in | |||
1340 | /// Params. | |||
1341 | TemplateParameterList * | |||
1342 | Sema::ActOnTemplateParameterList(unsigned Depth, | |||
1343 | SourceLocation ExportLoc, | |||
1344 | SourceLocation TemplateLoc, | |||
1345 | SourceLocation LAngleLoc, | |||
1346 | ArrayRef<NamedDecl *> Params, | |||
1347 | SourceLocation RAngleLoc, | |||
1348 | Expr *RequiresClause) { | |||
1349 | if (ExportLoc.isValid()) | |||
1350 | Diag(ExportLoc, diag::warn_template_export_unsupported); | |||
1351 | ||||
1352 | return TemplateParameterList::Create( | |||
1353 | Context, TemplateLoc, LAngleLoc, | |||
1354 | llvm::makeArrayRef(Params.data(), Params.size()), | |||
1355 | RAngleLoc, RequiresClause); | |||
1356 | } | |||
1357 | ||||
1358 | static void SetNestedNameSpecifier(Sema &S, TagDecl *T, | |||
1359 | const CXXScopeSpec &SS) { | |||
1360 | if (SS.isSet()) | |||
1361 | T->setQualifierInfo(SS.getWithLocInContext(S.Context)); | |||
1362 | } | |||
1363 | ||||
1364 | DeclResult Sema::CheckClassTemplate( | |||
1365 | Scope *S, unsigned TagSpec, TagUseKind TUK, SourceLocation KWLoc, | |||
1366 | CXXScopeSpec &SS, IdentifierInfo *Name, SourceLocation NameLoc, | |||
1367 | const ParsedAttributesView &Attr, TemplateParameterList *TemplateParams, | |||
1368 | AccessSpecifier AS, SourceLocation ModulePrivateLoc, | |||
1369 | SourceLocation FriendLoc, unsigned NumOuterTemplateParamLists, | |||
1370 | TemplateParameterList **OuterTemplateParamLists, SkipBodyInfo *SkipBody) { | |||
1371 | assert(TemplateParams && TemplateParams->size() > 0 &&((TemplateParams && TemplateParams->size() > 0 && "No template parameters") ? static_cast<void> (0) : __assert_fail ("TemplateParams && TemplateParams->size() > 0 && \"No template parameters\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 1372, __PRETTY_FUNCTION__)) | |||
1372 | "No template parameters")((TemplateParams && TemplateParams->size() > 0 && "No template parameters") ? static_cast<void> (0) : __assert_fail ("TemplateParams && TemplateParams->size() > 0 && \"No template parameters\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 1372, __PRETTY_FUNCTION__)); | |||
1373 | assert(TUK != TUK_Reference && "Can only declare or define class templates")((TUK != TUK_Reference && "Can only declare or define class templates" ) ? static_cast<void> (0) : __assert_fail ("TUK != TUK_Reference && \"Can only declare or define class templates\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 1373, __PRETTY_FUNCTION__)); | |||
1374 | bool Invalid = false; | |||
1375 | ||||
1376 | // Check that we can declare a template here. | |||
1377 | if (CheckTemplateDeclScope(S, TemplateParams)) | |||
1378 | return true; | |||
1379 | ||||
1380 | TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec); | |||
1381 | assert(Kind != TTK_Enum && "can't build template of enumerated type")((Kind != TTK_Enum && "can't build template of enumerated type" ) ? static_cast<void> (0) : __assert_fail ("Kind != TTK_Enum && \"can't build template of enumerated type\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 1381, __PRETTY_FUNCTION__)); | |||
1382 | ||||
1383 | // There is no such thing as an unnamed class template. | |||
1384 | if (!Name) { | |||
1385 | Diag(KWLoc, diag::err_template_unnamed_class); | |||
1386 | return true; | |||
1387 | } | |||
1388 | ||||
1389 | // Find any previous declaration with this name. For a friend with no | |||
1390 | // scope explicitly specified, we only look for tag declarations (per | |||
1391 | // C++11 [basic.lookup.elab]p2). | |||
1392 | DeclContext *SemanticContext; | |||
1393 | LookupResult Previous(*this, Name, NameLoc, | |||
1394 | (SS.isEmpty() && TUK == TUK_Friend) | |||
1395 | ? LookupTagName : LookupOrdinaryName, | |||
1396 | forRedeclarationInCurContext()); | |||
1397 | if (SS.isNotEmpty() && !SS.isInvalid()) { | |||
1398 | SemanticContext = computeDeclContext(SS, true); | |||
1399 | if (!SemanticContext) { | |||
1400 | // FIXME: Horrible, horrible hack! We can't currently represent this | |||
1401 | // in the AST, and historically we have just ignored such friend | |||
1402 | // class templates, so don't complain here. | |||
1403 | Diag(NameLoc, TUK == TUK_Friend | |||
1404 | ? diag::warn_template_qualified_friend_ignored | |||
1405 | : diag::err_template_qualified_declarator_no_match) | |||
1406 | << SS.getScopeRep() << SS.getRange(); | |||
1407 | return TUK != TUK_Friend; | |||
1408 | } | |||
1409 | ||||
1410 | if (RequireCompleteDeclContext(SS, SemanticContext)) | |||
1411 | return true; | |||
1412 | ||||
1413 | // If we're adding a template to a dependent context, we may need to | |||
1414 | // rebuilding some of the types used within the template parameter list, | |||
1415 | // now that we know what the current instantiation is. | |||
1416 | if (SemanticContext->isDependentContext()) { | |||
1417 | ContextRAII SavedContext(*this, SemanticContext); | |||
1418 | if (RebuildTemplateParamsInCurrentInstantiation(TemplateParams)) | |||
1419 | Invalid = true; | |||
1420 | } else if (TUK != TUK_Friend && TUK != TUK_Reference) | |||
1421 | diagnoseQualifiedDeclaration(SS, SemanticContext, Name, NameLoc, false); | |||
1422 | ||||
1423 | LookupQualifiedName(Previous, SemanticContext); | |||
1424 | } else { | |||
1425 | SemanticContext = CurContext; | |||
1426 | ||||
1427 | // C++14 [class.mem]p14: | |||
1428 | // If T is the name of a class, then each of the following shall have a | |||
1429 | // name different from T: | |||
1430 | // -- every member template of class T | |||
1431 | if (TUK != TUK_Friend && | |||
1432 | DiagnoseClassNameShadow(SemanticContext, | |||
1433 | DeclarationNameInfo(Name, NameLoc))) | |||
1434 | return true; | |||
1435 | ||||
1436 | LookupName(Previous, S); | |||
1437 | } | |||
1438 | ||||
1439 | if (Previous.isAmbiguous()) | |||
1440 | return true; | |||
1441 | ||||
1442 | NamedDecl *PrevDecl = nullptr; | |||
1443 | if (Previous.begin() != Previous.end()) | |||
1444 | PrevDecl = (*Previous.begin())->getUnderlyingDecl(); | |||
1445 | ||||
1446 | if (PrevDecl && PrevDecl->isTemplateParameter()) { | |||
1447 | // Maybe we will complain about the shadowed template parameter. | |||
1448 | DiagnoseTemplateParameterShadow(NameLoc, PrevDecl); | |||
1449 | // Just pretend that we didn't see the previous declaration. | |||
1450 | PrevDecl = nullptr; | |||
1451 | } | |||
1452 | ||||
1453 | // If there is a previous declaration with the same name, check | |||
1454 | // whether this is a valid redeclaration. | |||
1455 | ClassTemplateDecl *PrevClassTemplate = | |||
1456 | dyn_cast_or_null<ClassTemplateDecl>(PrevDecl); | |||
1457 | ||||
1458 | // We may have found the injected-class-name of a class template, | |||
1459 | // class template partial specialization, or class template specialization. | |||
1460 | // In these cases, grab the template that is being defined or specialized. | |||
1461 | if (!PrevClassTemplate && PrevDecl && isa<CXXRecordDecl>(PrevDecl) && | |||
1462 | cast<CXXRecordDecl>(PrevDecl)->isInjectedClassName()) { | |||
1463 | PrevDecl = cast<CXXRecordDecl>(PrevDecl->getDeclContext()); | |||
1464 | PrevClassTemplate | |||
1465 | = cast<CXXRecordDecl>(PrevDecl)->getDescribedClassTemplate(); | |||
1466 | if (!PrevClassTemplate && isa<ClassTemplateSpecializationDecl>(PrevDecl)) { | |||
1467 | PrevClassTemplate | |||
1468 | = cast<ClassTemplateSpecializationDecl>(PrevDecl) | |||
1469 | ->getSpecializedTemplate(); | |||
1470 | } | |||
1471 | } | |||
1472 | ||||
1473 | if (TUK == TUK_Friend) { | |||
1474 | // C++ [namespace.memdef]p3: | |||
1475 | // [...] When looking for a prior declaration of a class or a function | |||
1476 | // declared as a friend, and when the name of the friend class or | |||
1477 | // function is neither a qualified name nor a template-id, scopes outside | |||
1478 | // the innermost enclosing namespace scope are not considered. | |||
1479 | if (!SS.isSet()) { | |||
1480 | DeclContext *OutermostContext = CurContext; | |||
1481 | while (!OutermostContext->isFileContext()) | |||
1482 | OutermostContext = OutermostContext->getLookupParent(); | |||
1483 | ||||
1484 | if (PrevDecl && | |||
1485 | (OutermostContext->Equals(PrevDecl->getDeclContext()) || | |||
1486 | OutermostContext->Encloses(PrevDecl->getDeclContext()))) { | |||
1487 | SemanticContext = PrevDecl->getDeclContext(); | |||
1488 | } else { | |||
1489 | // Declarations in outer scopes don't matter. However, the outermost | |||
1490 | // context we computed is the semantic context for our new | |||
1491 | // declaration. | |||
1492 | PrevDecl = PrevClassTemplate = nullptr; | |||
1493 | SemanticContext = OutermostContext; | |||
1494 | ||||
1495 | // Check that the chosen semantic context doesn't already contain a | |||
1496 | // declaration of this name as a non-tag type. | |||
1497 | Previous.clear(LookupOrdinaryName); | |||
1498 | DeclContext *LookupContext = SemanticContext; | |||
1499 | while (LookupContext->isTransparentContext()) | |||
1500 | LookupContext = LookupContext->getLookupParent(); | |||
1501 | LookupQualifiedName(Previous, LookupContext); | |||
1502 | ||||
1503 | if (Previous.isAmbiguous()) | |||
1504 | return true; | |||
1505 | ||||
1506 | if (Previous.begin() != Previous.end()) | |||
1507 | PrevDecl = (*Previous.begin())->getUnderlyingDecl(); | |||
1508 | } | |||
1509 | } | |||
1510 | } else if (PrevDecl && | |||
1511 | !isDeclInScope(Previous.getRepresentativeDecl(), SemanticContext, | |||
1512 | S, SS.isValid())) | |||
1513 | PrevDecl = PrevClassTemplate = nullptr; | |||
1514 | ||||
1515 | if (auto *Shadow = dyn_cast_or_null<UsingShadowDecl>( | |||
1516 | PrevDecl ? Previous.getRepresentativeDecl() : nullptr)) { | |||
1517 | if (SS.isEmpty() && | |||
1518 | !(PrevClassTemplate && | |||
1519 | PrevClassTemplate->getDeclContext()->getRedeclContext()->Equals( | |||
1520 | SemanticContext->getRedeclContext()))) { | |||
1521 | Diag(KWLoc, diag::err_using_decl_conflict_reverse); | |||
1522 | Diag(Shadow->getTargetDecl()->getLocation(), | |||
1523 | diag::note_using_decl_target); | |||
1524 | Diag(Shadow->getUsingDecl()->getLocation(), diag::note_using_decl) << 0; | |||
1525 | // Recover by ignoring the old declaration. | |||
1526 | PrevDecl = PrevClassTemplate = nullptr; | |||
1527 | } | |||
1528 | } | |||
1529 | ||||
1530 | // TODO Memory management; associated constraints are not always stored. | |||
1531 | Expr *const CurAC = formAssociatedConstraints(TemplateParams, nullptr); | |||
1532 | ||||
1533 | if (PrevClassTemplate) { | |||
1534 | // Ensure that the template parameter lists are compatible. Skip this check | |||
1535 | // for a friend in a dependent context: the template parameter list itself | |||
1536 | // could be dependent. | |||
1537 | if (!(TUK == TUK_Friend && CurContext->isDependentContext()) && | |||
1538 | !TemplateParameterListsAreEqual(TemplateParams, | |||
1539 | PrevClassTemplate->getTemplateParameters(), | |||
1540 | /*Complain=*/true, | |||
1541 | TPL_TemplateMatch)) | |||
1542 | return true; | |||
1543 | ||||
1544 | // Check for matching associated constraints on redeclarations. | |||
1545 | const Expr *const PrevAC = PrevClassTemplate->getAssociatedConstraints(); | |||
1546 | const bool RedeclACMismatch = [&] { | |||
1547 | if (!(CurAC || PrevAC)) | |||
1548 | return false; // Nothing to check; no mismatch. | |||
1549 | if (CurAC && PrevAC) { | |||
1550 | llvm::FoldingSetNodeID CurACInfo, PrevACInfo; | |||
1551 | CurAC->Profile(CurACInfo, Context, /*Canonical=*/true); | |||
1552 | PrevAC->Profile(PrevACInfo, Context, /*Canonical=*/true); | |||
1553 | if (CurACInfo == PrevACInfo) | |||
1554 | return false; // All good; no mismatch. | |||
1555 | } | |||
1556 | return true; | |||
1557 | }(); | |||
1558 | ||||
1559 | if (RedeclACMismatch) { | |||
1560 | Diag(CurAC ? CurAC->getBeginLoc() : NameLoc, | |||
1561 | diag::err_template_different_associated_constraints); | |||
1562 | Diag(PrevAC ? PrevAC->getBeginLoc() : PrevClassTemplate->getLocation(), | |||
1563 | diag::note_template_prev_declaration) | |||
1564 | << /*declaration*/ 0; | |||
1565 | return true; | |||
1566 | } | |||
1567 | ||||
1568 | // C++ [temp.class]p4: | |||
1569 | // In a redeclaration, partial specialization, explicit | |||
1570 | // specialization or explicit instantiation of a class template, | |||
1571 | // the class-key shall agree in kind with the original class | |||
1572 | // template declaration (7.1.5.3). | |||
1573 | RecordDecl *PrevRecordDecl = PrevClassTemplate->getTemplatedDecl(); | |||
1574 | if (!isAcceptableTagRedeclaration(PrevRecordDecl, Kind, | |||
1575 | TUK == TUK_Definition, KWLoc, Name)) { | |||
1576 | Diag(KWLoc, diag::err_use_with_wrong_tag) | |||
1577 | << Name | |||
1578 | << FixItHint::CreateReplacement(KWLoc, PrevRecordDecl->getKindName()); | |||
1579 | Diag(PrevRecordDecl->getLocation(), diag::note_previous_use); | |||
1580 | Kind = PrevRecordDecl->getTagKind(); | |||
1581 | } | |||
1582 | ||||
1583 | // Check for redefinition of this class template. | |||
1584 | if (TUK == TUK_Definition) { | |||
1585 | if (TagDecl *Def = PrevRecordDecl->getDefinition()) { | |||
1586 | // If we have a prior definition that is not visible, treat this as | |||
1587 | // simply making that previous definition visible. | |||
1588 | NamedDecl *Hidden = nullptr; | |||
1589 | if (SkipBody && !hasVisibleDefinition(Def, &Hidden)) { | |||
1590 | SkipBody->ShouldSkip = true; | |||
1591 | SkipBody->Previous = Def; | |||
1592 | auto *Tmpl = cast<CXXRecordDecl>(Hidden)->getDescribedClassTemplate(); | |||
1593 | assert(Tmpl && "original definition of a class template is not a "((Tmpl && "original definition of a class template is not a " "class template?") ? static_cast<void> (0) : __assert_fail ("Tmpl && \"original definition of a class template is not a \" \"class template?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 1594, __PRETTY_FUNCTION__)) | |||
1594 | "class template?")((Tmpl && "original definition of a class template is not a " "class template?") ? static_cast<void> (0) : __assert_fail ("Tmpl && \"original definition of a class template is not a \" \"class template?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 1594, __PRETTY_FUNCTION__)); | |||
1595 | makeMergedDefinitionVisible(Hidden); | |||
1596 | makeMergedDefinitionVisible(Tmpl); | |||
1597 | } else { | |||
1598 | Diag(NameLoc, diag::err_redefinition) << Name; | |||
1599 | Diag(Def->getLocation(), diag::note_previous_definition); | |||
1600 | // FIXME: Would it make sense to try to "forget" the previous | |||
1601 | // definition, as part of error recovery? | |||
1602 | return true; | |||
1603 | } | |||
1604 | } | |||
1605 | } | |||
1606 | } else if (PrevDecl) { | |||
1607 | // C++ [temp]p5: | |||
1608 | // A class template shall not have the same name as any other | |||
1609 | // template, class, function, object, enumeration, enumerator, | |||
1610 | // namespace, or type in the same scope (3.3), except as specified | |||
1611 | // in (14.5.4). | |||
1612 | Diag(NameLoc, diag::err_redefinition_different_kind) << Name; | |||
1613 | Diag(PrevDecl->getLocation(), diag::note_previous_definition); | |||
1614 | return true; | |||
1615 | } | |||
1616 | ||||
1617 | // Check the template parameter list of this declaration, possibly | |||
1618 | // merging in the template parameter list from the previous class | |||
1619 | // template declaration. Skip this check for a friend in a dependent | |||
1620 | // context, because the template parameter list might be dependent. | |||
1621 | if (!(TUK == TUK_Friend && CurContext->isDependentContext()) && | |||
1622 | CheckTemplateParameterList( | |||
1623 | TemplateParams, | |||
1624 | PrevClassTemplate | |||
1625 | ? PrevClassTemplate->getMostRecentDecl()->getTemplateParameters() | |||
1626 | : nullptr, | |||
1627 | (SS.isSet() && SemanticContext && SemanticContext->isRecord() && | |||
1628 | SemanticContext->isDependentContext()) | |||
1629 | ? TPC_ClassTemplateMember | |||
1630 | : TUK == TUK_Friend ? TPC_FriendClassTemplate : TPC_ClassTemplate, | |||
1631 | SkipBody)) | |||
1632 | Invalid = true; | |||
1633 | ||||
1634 | if (SS.isSet()) { | |||
1635 | // If the name of the template was qualified, we must be defining the | |||
1636 | // template out-of-line. | |||
1637 | if (!SS.isInvalid() && !Invalid && !PrevClassTemplate) { | |||
1638 | Diag(NameLoc, TUK == TUK_Friend ? diag::err_friend_decl_does_not_match | |||
1639 | : diag::err_member_decl_does_not_match) | |||
1640 | << Name << SemanticContext << /*IsDefinition*/true << SS.getRange(); | |||
1641 | Invalid = true; | |||
1642 | } | |||
1643 | } | |||
1644 | ||||
1645 | // If this is a templated friend in a dependent context we should not put it | |||
1646 | // on the redecl chain. In some cases, the templated friend can be the most | |||
1647 | // recent declaration tricking the template instantiator to make substitutions | |||
1648 | // there. | |||
1649 | // FIXME: Figure out how to combine with shouldLinkDependentDeclWithPrevious | |||
1650 | bool ShouldAddRedecl | |||
1651 | = !(TUK == TUK_Friend && CurContext->isDependentContext()); | |||
1652 | ||||
1653 | CXXRecordDecl *NewClass = | |||
1654 | CXXRecordDecl::Create(Context, Kind, SemanticContext, KWLoc, NameLoc, Name, | |||
1655 | PrevClassTemplate && ShouldAddRedecl ? | |||
1656 | PrevClassTemplate->getTemplatedDecl() : nullptr, | |||
1657 | /*DelayTypeCreation=*/true); | |||
1658 | SetNestedNameSpecifier(*this, NewClass, SS); | |||
1659 | if (NumOuterTemplateParamLists > 0) | |||
1660 | NewClass->setTemplateParameterListsInfo( | |||
1661 | Context, llvm::makeArrayRef(OuterTemplateParamLists, | |||
1662 | NumOuterTemplateParamLists)); | |||
1663 | ||||
1664 | // Add alignment attributes if necessary; these attributes are checked when | |||
1665 | // the ASTContext lays out the structure. | |||
1666 | if (TUK == TUK_Definition && (!SkipBody || !SkipBody->ShouldSkip)) { | |||
1667 | AddAlignmentAttributesForRecord(NewClass); | |||
1668 | AddMsStructLayoutForRecord(NewClass); | |||
1669 | } | |||
1670 | ||||
1671 | // Attach the associated constraints when the declaration will not be part of | |||
1672 | // a decl chain. | |||
1673 | Expr *const ACtoAttach = | |||
1674 | PrevClassTemplate && ShouldAddRedecl ? nullptr : CurAC; | |||
1675 | ||||
1676 | ClassTemplateDecl *NewTemplate | |||
1677 | = ClassTemplateDecl::Create(Context, SemanticContext, NameLoc, | |||
1678 | DeclarationName(Name), TemplateParams, | |||
1679 | NewClass, ACtoAttach); | |||
1680 | ||||
1681 | if (ShouldAddRedecl) | |||
1682 | NewTemplate->setPreviousDecl(PrevClassTemplate); | |||
1683 | ||||
1684 | NewClass->setDescribedClassTemplate(NewTemplate); | |||
1685 | ||||
1686 | if (ModulePrivateLoc.isValid()) | |||
1687 | NewTemplate->setModulePrivate(); | |||
1688 | ||||
1689 | // Build the type for the class template declaration now. | |||
1690 | QualType T = NewTemplate->getInjectedClassNameSpecialization(); | |||
1691 | T = Context.getInjectedClassNameType(NewClass, T); | |||
1692 | assert(T->isDependentType() && "Class template type is not dependent?")((T->isDependentType() && "Class template type is not dependent?" ) ? static_cast<void> (0) : __assert_fail ("T->isDependentType() && \"Class template type is not dependent?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 1692, __PRETTY_FUNCTION__)); | |||
1693 | (void)T; | |||
1694 | ||||
1695 | // If we are providing an explicit specialization of a member that is a | |||
1696 | // class template, make a note of that. | |||
1697 | if (PrevClassTemplate && | |||
1698 | PrevClassTemplate->getInstantiatedFromMemberTemplate()) | |||
1699 | PrevClassTemplate->setMemberSpecialization(); | |||
1700 | ||||
1701 | // Set the access specifier. | |||
1702 | if (!Invalid && TUK != TUK_Friend && NewTemplate->getDeclContext()->isRecord()) | |||
1703 | SetMemberAccessSpecifier(NewTemplate, PrevClassTemplate, AS); | |||
1704 | ||||
1705 | // Set the lexical context of these templates | |||
1706 | NewClass->setLexicalDeclContext(CurContext); | |||
1707 | NewTemplate->setLexicalDeclContext(CurContext); | |||
1708 | ||||
1709 | if (TUK == TUK_Definition && (!SkipBody || !SkipBody->ShouldSkip)) | |||
1710 | NewClass->startDefinition(); | |||
1711 | ||||
1712 | ProcessDeclAttributeList(S, NewClass, Attr); | |||
1713 | ||||
1714 | if (PrevClassTemplate) | |||
1715 | mergeDeclAttributes(NewClass, PrevClassTemplate->getTemplatedDecl()); | |||
1716 | ||||
1717 | AddPushedVisibilityAttribute(NewClass); | |||
1718 | inferGslOwnerPointerAttribute(NewClass); | |||
1719 | ||||
1720 | if (TUK != TUK_Friend) { | |||
1721 | // Per C++ [basic.scope.temp]p2, skip the template parameter scopes. | |||
1722 | Scope *Outer = S; | |||
1723 | while ((Outer->getFlags() & Scope::TemplateParamScope) != 0) | |||
1724 | Outer = Outer->getParent(); | |||
1725 | PushOnScopeChains(NewTemplate, Outer); | |||
1726 | } else { | |||
1727 | if (PrevClassTemplate && PrevClassTemplate->getAccess() != AS_none) { | |||
1728 | NewTemplate->setAccess(PrevClassTemplate->getAccess()); | |||
1729 | NewClass->setAccess(PrevClassTemplate->getAccess()); | |||
1730 | } | |||
1731 | ||||
1732 | NewTemplate->setObjectOfFriendDecl(); | |||
1733 | ||||
1734 | // Friend templates are visible in fairly strange ways. | |||
1735 | if (!CurContext->isDependentContext()) { | |||
1736 | DeclContext *DC = SemanticContext->getRedeclContext(); | |||
1737 | DC->makeDeclVisibleInContext(NewTemplate); | |||
1738 | if (Scope *EnclosingScope = getScopeForDeclContext(S, DC)) | |||
1739 | PushOnScopeChains(NewTemplate, EnclosingScope, | |||
1740 | /* AddToContext = */ false); | |||
1741 | } | |||
1742 | ||||
1743 | FriendDecl *Friend = FriendDecl::Create( | |||
1744 | Context, CurContext, NewClass->getLocation(), NewTemplate, FriendLoc); | |||
1745 | Friend->setAccess(AS_public); | |||
1746 | CurContext->addDecl(Friend); | |||
1747 | } | |||
1748 | ||||
1749 | if (PrevClassTemplate) | |||
1750 | CheckRedeclarationModuleOwnership(NewTemplate, PrevClassTemplate); | |||
1751 | ||||
1752 | if (Invalid) { | |||
1753 | NewTemplate->setInvalidDecl(); | |||
1754 | NewClass->setInvalidDecl(); | |||
1755 | } | |||
1756 | ||||
1757 | ActOnDocumentableDecl(NewTemplate); | |||
1758 | ||||
1759 | if (SkipBody && SkipBody->ShouldSkip) | |||
1760 | return SkipBody->Previous; | |||
1761 | ||||
1762 | return NewTemplate; | |||
1763 | } | |||
1764 | ||||
1765 | namespace { | |||
1766 | /// Tree transform to "extract" a transformed type from a class template's | |||
1767 | /// constructor to a deduction guide. | |||
1768 | class ExtractTypeForDeductionGuide | |||
1769 | : public TreeTransform<ExtractTypeForDeductionGuide> { | |||
1770 | public: | |||
1771 | typedef TreeTransform<ExtractTypeForDeductionGuide> Base; | |||
1772 | ExtractTypeForDeductionGuide(Sema &SemaRef) : Base(SemaRef) {} | |||
1773 | ||||
1774 | TypeSourceInfo *transform(TypeSourceInfo *TSI) { return TransformType(TSI); } | |||
1775 | ||||
1776 | QualType TransformTypedefType(TypeLocBuilder &TLB, TypedefTypeLoc TL) { | |||
1777 | return TransformType( | |||
1778 | TLB, | |||
1779 | TL.getTypedefNameDecl()->getTypeSourceInfo()->getTypeLoc()); | |||
1780 | } | |||
1781 | }; | |||
1782 | ||||
1783 | /// Transform to convert portions of a constructor declaration into the | |||
1784 | /// corresponding deduction guide, per C++1z [over.match.class.deduct]p1. | |||
1785 | struct ConvertConstructorToDeductionGuideTransform { | |||
1786 | ConvertConstructorToDeductionGuideTransform(Sema &S, | |||
1787 | ClassTemplateDecl *Template) | |||
1788 | : SemaRef(S), Template(Template) {} | |||
1789 | ||||
1790 | Sema &SemaRef; | |||
1791 | ClassTemplateDecl *Template; | |||
1792 | ||||
1793 | DeclContext *DC = Template->getDeclContext(); | |||
1794 | CXXRecordDecl *Primary = Template->getTemplatedDecl(); | |||
1795 | DeclarationName DeductionGuideName = | |||
1796 | SemaRef.Context.DeclarationNames.getCXXDeductionGuideName(Template); | |||
1797 | ||||
1798 | QualType DeducedType = SemaRef.Context.getTypeDeclType(Primary); | |||
1799 | ||||
1800 | // Index adjustment to apply to convert depth-1 template parameters into | |||
1801 | // depth-0 template parameters. | |||
1802 | unsigned Depth1IndexAdjustment = Template->getTemplateParameters()->size(); | |||
1803 | ||||
1804 | /// Transform a constructor declaration into a deduction guide. | |||
1805 | NamedDecl *transformConstructor(FunctionTemplateDecl *FTD, | |||
1806 | CXXConstructorDecl *CD) { | |||
1807 | SmallVector<TemplateArgument, 16> SubstArgs; | |||
1808 | ||||
1809 | LocalInstantiationScope Scope(SemaRef); | |||
1810 | ||||
1811 | // C++ [over.match.class.deduct]p1: | |||
1812 | // -- For each constructor of the class template designated by the | |||
1813 | // template-name, a function template with the following properties: | |||
1814 | ||||
1815 | // -- The template parameters are the template parameters of the class | |||
1816 | // template followed by the template parameters (including default | |||
1817 | // template arguments) of the constructor, if any. | |||
1818 | TemplateParameterList *TemplateParams = Template->getTemplateParameters(); | |||
1819 | if (FTD) { | |||
1820 | TemplateParameterList *InnerParams = FTD->getTemplateParameters(); | |||
1821 | SmallVector<NamedDecl *, 16> AllParams; | |||
1822 | AllParams.reserve(TemplateParams->size() + InnerParams->size()); | |||
1823 | AllParams.insert(AllParams.begin(), | |||
1824 | TemplateParams->begin(), TemplateParams->end()); | |||
1825 | SubstArgs.reserve(InnerParams->size()); | |||
1826 | ||||
1827 | // Later template parameters could refer to earlier ones, so build up | |||
1828 | // a list of substituted template arguments as we go. | |||
1829 | for (NamedDecl *Param : *InnerParams) { | |||
1830 | MultiLevelTemplateArgumentList Args; | |||
1831 | Args.addOuterTemplateArguments(SubstArgs); | |||
1832 | Args.addOuterRetainedLevel(); | |||
1833 | NamedDecl *NewParam = transformTemplateParameter(Param, Args); | |||
1834 | if (!NewParam) | |||
1835 | return nullptr; | |||
1836 | AllParams.push_back(NewParam); | |||
1837 | SubstArgs.push_back(SemaRef.Context.getCanonicalTemplateArgument( | |||
1838 | SemaRef.Context.getInjectedTemplateArg(NewParam))); | |||
1839 | } | |||
1840 | TemplateParams = TemplateParameterList::Create( | |||
1841 | SemaRef.Context, InnerParams->getTemplateLoc(), | |||
1842 | InnerParams->getLAngleLoc(), AllParams, InnerParams->getRAngleLoc(), | |||
1843 | /*FIXME: RequiresClause*/ nullptr); | |||
1844 | } | |||
1845 | ||||
1846 | // If we built a new template-parameter-list, track that we need to | |||
1847 | // substitute references to the old parameters into references to the | |||
1848 | // new ones. | |||
1849 | MultiLevelTemplateArgumentList Args; | |||
1850 | if (FTD) { | |||
1851 | Args.addOuterTemplateArguments(SubstArgs); | |||
1852 | Args.addOuterRetainedLevel(); | |||
1853 | } | |||
1854 | ||||
1855 | FunctionProtoTypeLoc FPTL = CD->getTypeSourceInfo()->getTypeLoc() | |||
1856 | .getAsAdjusted<FunctionProtoTypeLoc>(); | |||
1857 | assert(FPTL && "no prototype for constructor declaration")((FPTL && "no prototype for constructor declaration") ? static_cast<void> (0) : __assert_fail ("FPTL && \"no prototype for constructor declaration\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 1857, __PRETTY_FUNCTION__)); | |||
1858 | ||||
1859 | // Transform the type of the function, adjusting the return type and | |||
1860 | // replacing references to the old parameters with references to the | |||
1861 | // new ones. | |||
1862 | TypeLocBuilder TLB; | |||
1863 | SmallVector<ParmVarDecl*, 8> Params; | |||
1864 | QualType NewType = transformFunctionProtoType(TLB, FPTL, Params, Args); | |||
1865 | if (NewType.isNull()) | |||
1866 | return nullptr; | |||
1867 | TypeSourceInfo *NewTInfo = TLB.getTypeSourceInfo(SemaRef.Context, NewType); | |||
1868 | ||||
1869 | return buildDeductionGuide(TemplateParams, CD->getExplicitSpecifier(), | |||
1870 | NewTInfo, CD->getBeginLoc(), CD->getLocation(), | |||
1871 | CD->getEndLoc()); | |||
1872 | } | |||
1873 | ||||
1874 | /// Build a deduction guide with the specified parameter types. | |||
1875 | NamedDecl *buildSimpleDeductionGuide(MutableArrayRef<QualType> ParamTypes) { | |||
1876 | SourceLocation Loc = Template->getLocation(); | |||
1877 | ||||
1878 | // Build the requested type. | |||
1879 | FunctionProtoType::ExtProtoInfo EPI; | |||
1880 | EPI.HasTrailingReturn = true; | |||
1881 | QualType Result = SemaRef.BuildFunctionType(DeducedType, ParamTypes, Loc, | |||
1882 | DeductionGuideName, EPI); | |||
1883 | TypeSourceInfo *TSI = SemaRef.Context.getTrivialTypeSourceInfo(Result, Loc); | |||
1884 | ||||
1885 | FunctionProtoTypeLoc FPTL = | |||
1886 | TSI->getTypeLoc().castAs<FunctionProtoTypeLoc>(); | |||
1887 | ||||
1888 | // Build the parameters, needed during deduction / substitution. | |||
1889 | SmallVector<ParmVarDecl*, 4> Params; | |||
1890 | for (auto T : ParamTypes) { | |||
1891 | ParmVarDecl *NewParam = ParmVarDecl::Create( | |||
1892 | SemaRef.Context, DC, Loc, Loc, nullptr, T, | |||
1893 | SemaRef.Context.getTrivialTypeSourceInfo(T, Loc), SC_None, nullptr); | |||
1894 | NewParam->setScopeInfo(0, Params.size()); | |||
1895 | FPTL.setParam(Params.size(), NewParam); | |||
1896 | Params.push_back(NewParam); | |||
1897 | } | |||
1898 | ||||
1899 | return buildDeductionGuide(Template->getTemplateParameters(), | |||
1900 | ExplicitSpecifier(), TSI, Loc, Loc, Loc); | |||
1901 | } | |||
1902 | ||||
1903 | private: | |||
1904 | /// Transform a constructor template parameter into a deduction guide template | |||
1905 | /// parameter, rebuilding any internal references to earlier parameters and | |||
1906 | /// renumbering as we go. | |||
1907 | NamedDecl *transformTemplateParameter(NamedDecl *TemplateParam, | |||
1908 | MultiLevelTemplateArgumentList &Args) { | |||
1909 | if (auto *TTP = dyn_cast<TemplateTypeParmDecl>(TemplateParam)) { | |||
1910 | // TemplateTypeParmDecl's index cannot be changed after creation, so | |||
1911 | // substitute it directly. | |||
1912 | auto *NewTTP = TemplateTypeParmDecl::Create( | |||
1913 | SemaRef.Context, DC, TTP->getBeginLoc(), TTP->getLocation(), | |||
1914 | /*Depth*/ 0, Depth1IndexAdjustment + TTP->getIndex(), | |||
1915 | TTP->getIdentifier(), TTP->wasDeclaredWithTypename(), | |||
1916 | TTP->isParameterPack()); | |||
1917 | if (TTP->hasDefaultArgument()) { | |||
1918 | TypeSourceInfo *InstantiatedDefaultArg = | |||
1919 | SemaRef.SubstType(TTP->getDefaultArgumentInfo(), Args, | |||
1920 | TTP->getDefaultArgumentLoc(), TTP->getDeclName()); | |||
1921 | if (InstantiatedDefaultArg) | |||
1922 | NewTTP->setDefaultArgument(InstantiatedDefaultArg); | |||
1923 | } | |||
1924 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(TemplateParam, | |||
1925 | NewTTP); | |||
1926 | return NewTTP; | |||
1927 | } | |||
1928 | ||||
1929 | if (auto *TTP = dyn_cast<TemplateTemplateParmDecl>(TemplateParam)) | |||
1930 | return transformTemplateParameterImpl(TTP, Args); | |||
1931 | ||||
1932 | return transformTemplateParameterImpl( | |||
1933 | cast<NonTypeTemplateParmDecl>(TemplateParam), Args); | |||
1934 | } | |||
1935 | template<typename TemplateParmDecl> | |||
1936 | TemplateParmDecl * | |||
1937 | transformTemplateParameterImpl(TemplateParmDecl *OldParam, | |||
1938 | MultiLevelTemplateArgumentList &Args) { | |||
1939 | // Ask the template instantiator to do the heavy lifting for us, then adjust | |||
1940 | // the index of the parameter once it's done. | |||
1941 | auto *NewParam = | |||
1942 | cast_or_null<TemplateParmDecl>(SemaRef.SubstDecl(OldParam, DC, Args)); | |||
1943 | assert(NewParam->getDepth() == 0 && "unexpected template param depth")((NewParam->getDepth() == 0 && "unexpected template param depth" ) ? static_cast<void> (0) : __assert_fail ("NewParam->getDepth() == 0 && \"unexpected template param depth\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 1943, __PRETTY_FUNCTION__)); | |||
1944 | NewParam->setPosition(NewParam->getPosition() + Depth1IndexAdjustment); | |||
1945 | return NewParam; | |||
1946 | } | |||
1947 | ||||
1948 | QualType transformFunctionProtoType(TypeLocBuilder &TLB, | |||
1949 | FunctionProtoTypeLoc TL, | |||
1950 | SmallVectorImpl<ParmVarDecl*> &Params, | |||
1951 | MultiLevelTemplateArgumentList &Args) { | |||
1952 | SmallVector<QualType, 4> ParamTypes; | |||
1953 | const FunctionProtoType *T = TL.getTypePtr(); | |||
1954 | ||||
1955 | // -- The types of the function parameters are those of the constructor. | |||
1956 | for (auto *OldParam : TL.getParams()) { | |||
1957 | ParmVarDecl *NewParam = transformFunctionTypeParam(OldParam, Args); | |||
1958 | if (!NewParam) | |||
1959 | return QualType(); | |||
1960 | ParamTypes.push_back(NewParam->getType()); | |||
1961 | Params.push_back(NewParam); | |||
1962 | } | |||
1963 | ||||
1964 | // -- The return type is the class template specialization designated by | |||
1965 | // the template-name and template arguments corresponding to the | |||
1966 | // template parameters obtained from the class template. | |||
1967 | // | |||
1968 | // We use the injected-class-name type of the primary template instead. | |||
1969 | // This has the convenient property that it is different from any type that | |||
1970 | // the user can write in a deduction-guide (because they cannot enter the | |||
1971 | // context of the template), so implicit deduction guides can never collide | |||
1972 | // with explicit ones. | |||
1973 | QualType ReturnType = DeducedType; | |||
1974 | TLB.pushTypeSpec(ReturnType).setNameLoc(Primary->getLocation()); | |||
1975 | ||||
1976 | // Resolving a wording defect, we also inherit the variadicness of the | |||
1977 | // constructor. | |||
1978 | FunctionProtoType::ExtProtoInfo EPI; | |||
1979 | EPI.Variadic = T->isVariadic(); | |||
1980 | EPI.HasTrailingReturn = true; | |||
1981 | ||||
1982 | QualType Result = SemaRef.BuildFunctionType( | |||
1983 | ReturnType, ParamTypes, TL.getBeginLoc(), DeductionGuideName, EPI); | |||
1984 | if (Result.isNull()) | |||
1985 | return QualType(); | |||
1986 | ||||
1987 | FunctionProtoTypeLoc NewTL = TLB.push<FunctionProtoTypeLoc>(Result); | |||
1988 | NewTL.setLocalRangeBegin(TL.getLocalRangeBegin()); | |||
1989 | NewTL.setLParenLoc(TL.getLParenLoc()); | |||
1990 | NewTL.setRParenLoc(TL.getRParenLoc()); | |||
1991 | NewTL.setExceptionSpecRange(SourceRange()); | |||
1992 | NewTL.setLocalRangeEnd(TL.getLocalRangeEnd()); | |||
1993 | for (unsigned I = 0, E = NewTL.getNumParams(); I != E; ++I) | |||
1994 | NewTL.setParam(I, Params[I]); | |||
1995 | ||||
1996 | return Result; | |||
1997 | } | |||
1998 | ||||
1999 | ParmVarDecl * | |||
2000 | transformFunctionTypeParam(ParmVarDecl *OldParam, | |||
2001 | MultiLevelTemplateArgumentList &Args) { | |||
2002 | TypeSourceInfo *OldDI = OldParam->getTypeSourceInfo(); | |||
2003 | TypeSourceInfo *NewDI; | |||
2004 | if (auto PackTL = OldDI->getTypeLoc().getAs<PackExpansionTypeLoc>()) { | |||
2005 | // Expand out the one and only element in each inner pack. | |||
2006 | Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, 0); | |||
2007 | NewDI = | |||
2008 | SemaRef.SubstType(PackTL.getPatternLoc(), Args, | |||
2009 | OldParam->getLocation(), OldParam->getDeclName()); | |||
2010 | if (!NewDI) return nullptr; | |||
2011 | NewDI = | |||
2012 | SemaRef.CheckPackExpansion(NewDI, PackTL.getEllipsisLoc(), | |||
2013 | PackTL.getTypePtr()->getNumExpansions()); | |||
2014 | } else | |||
2015 | NewDI = SemaRef.SubstType(OldDI, Args, OldParam->getLocation(), | |||
2016 | OldParam->getDeclName()); | |||
2017 | if (!NewDI) | |||
2018 | return nullptr; | |||
2019 | ||||
2020 | // Extract the type. This (for instance) replaces references to typedef | |||
2021 | // members of the current instantiations with the definitions of those | |||
2022 | // typedefs, avoiding triggering instantiation of the deduced type during | |||
2023 | // deduction. | |||
2024 | NewDI = ExtractTypeForDeductionGuide(SemaRef).transform(NewDI); | |||
2025 | ||||
2026 | // Resolving a wording defect, we also inherit default arguments from the | |||
2027 | // constructor. | |||
2028 | ExprResult NewDefArg; | |||
2029 | if (OldParam->hasDefaultArg()) { | |||
2030 | NewDefArg = SemaRef.SubstExpr(OldParam->getDefaultArg(), Args); | |||
2031 | if (NewDefArg.isInvalid()) | |||
2032 | return nullptr; | |||
2033 | } | |||
2034 | ||||
2035 | ParmVarDecl *NewParam = ParmVarDecl::Create(SemaRef.Context, DC, | |||
2036 | OldParam->getInnerLocStart(), | |||
2037 | OldParam->getLocation(), | |||
2038 | OldParam->getIdentifier(), | |||
2039 | NewDI->getType(), | |||
2040 | NewDI, | |||
2041 | OldParam->getStorageClass(), | |||
2042 | NewDefArg.get()); | |||
2043 | NewParam->setScopeInfo(OldParam->getFunctionScopeDepth(), | |||
2044 | OldParam->getFunctionScopeIndex()); | |||
2045 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(OldParam, NewParam); | |||
2046 | return NewParam; | |||
2047 | } | |||
2048 | ||||
2049 | NamedDecl *buildDeductionGuide(TemplateParameterList *TemplateParams, | |||
2050 | ExplicitSpecifier ES, TypeSourceInfo *TInfo, | |||
2051 | SourceLocation LocStart, SourceLocation Loc, | |||
2052 | SourceLocation LocEnd) { | |||
2053 | DeclarationNameInfo Name(DeductionGuideName, Loc); | |||
2054 | ArrayRef<ParmVarDecl *> Params = | |||
2055 | TInfo->getTypeLoc().castAs<FunctionProtoTypeLoc>().getParams(); | |||
2056 | ||||
2057 | // Build the implicit deduction guide template. | |||
2058 | auto *Guide = | |||
2059 | CXXDeductionGuideDecl::Create(SemaRef.Context, DC, LocStart, ES, Name, | |||
2060 | TInfo->getType(), TInfo, LocEnd); | |||
2061 | Guide->setImplicit(); | |||
2062 | Guide->setParams(Params); | |||
2063 | ||||
2064 | for (auto *Param : Params) | |||
2065 | Param->setDeclContext(Guide); | |||
2066 | ||||
2067 | auto *GuideTemplate = FunctionTemplateDecl::Create( | |||
2068 | SemaRef.Context, DC, Loc, DeductionGuideName, TemplateParams, Guide); | |||
2069 | GuideTemplate->setImplicit(); | |||
2070 | Guide->setDescribedFunctionTemplate(GuideTemplate); | |||
2071 | ||||
2072 | if (isa<CXXRecordDecl>(DC)) { | |||
2073 | Guide->setAccess(AS_public); | |||
2074 | GuideTemplate->setAccess(AS_public); | |||
2075 | } | |||
2076 | ||||
2077 | DC->addDecl(GuideTemplate); | |||
2078 | return GuideTemplate; | |||
2079 | } | |||
2080 | }; | |||
2081 | } | |||
2082 | ||||
2083 | void Sema::DeclareImplicitDeductionGuides(TemplateDecl *Template, | |||
2084 | SourceLocation Loc) { | |||
2085 | if (CXXRecordDecl *DefRecord = | |||
2086 | cast<CXXRecordDecl>(Template->getTemplatedDecl())->getDefinition()) { | |||
2087 | TemplateDecl *DescribedTemplate = DefRecord->getDescribedClassTemplate(); | |||
2088 | Template = DescribedTemplate ? DescribedTemplate : Template; | |||
2089 | } | |||
2090 | ||||
2091 | DeclContext *DC = Template->getDeclContext(); | |||
2092 | if (DC->isDependentContext()) | |||
2093 | return; | |||
2094 | ||||
2095 | ConvertConstructorToDeductionGuideTransform Transform( | |||
2096 | *this, cast<ClassTemplateDecl>(Template)); | |||
2097 | if (!isCompleteType(Loc, Transform.DeducedType)) | |||
2098 | return; | |||
2099 | ||||
2100 | // Check whether we've already declared deduction guides for this template. | |||
2101 | // FIXME: Consider storing a flag on the template to indicate this. | |||
2102 | auto Existing = DC->lookup(Transform.DeductionGuideName); | |||
2103 | for (auto *D : Existing) | |||
2104 | if (D->isImplicit()) | |||
2105 | return; | |||
2106 | ||||
2107 | // In case we were expanding a pack when we attempted to declare deduction | |||
2108 | // guides, turn off pack expansion for everything we're about to do. | |||
2109 | ArgumentPackSubstitutionIndexRAII SubstIndex(*this, -1); | |||
2110 | // Create a template instantiation record to track the "instantiation" of | |||
2111 | // constructors into deduction guides. | |||
2112 | // FIXME: Add a kind for this to give more meaningful diagnostics. But can | |||
2113 | // this substitution process actually fail? | |||
2114 | InstantiatingTemplate BuildingDeductionGuides(*this, Loc, Template); | |||
2115 | if (BuildingDeductionGuides.isInvalid()) | |||
2116 | return; | |||
2117 | ||||
2118 | // Convert declared constructors into deduction guide templates. | |||
2119 | // FIXME: Skip constructors for which deduction must necessarily fail (those | |||
2120 | // for which some class template parameter without a default argument never | |||
2121 | // appears in a deduced context). | |||
2122 | bool AddedAny = false; | |||
2123 | for (NamedDecl *D : LookupConstructors(Transform.Primary)) { | |||
2124 | D = D->getUnderlyingDecl(); | |||
2125 | if (D->isInvalidDecl() || D->isImplicit()) | |||
2126 | continue; | |||
2127 | D = cast<NamedDecl>(D->getCanonicalDecl()); | |||
2128 | ||||
2129 | auto *FTD = dyn_cast<FunctionTemplateDecl>(D); | |||
2130 | auto *CD = | |||
2131 | dyn_cast_or_null<CXXConstructorDecl>(FTD ? FTD->getTemplatedDecl() : D); | |||
2132 | // Class-scope explicit specializations (MS extension) do not result in | |||
2133 | // deduction guides. | |||
2134 | if (!CD || (!FTD && CD->isFunctionTemplateSpecialization())) | |||
2135 | continue; | |||
2136 | ||||
2137 | Transform.transformConstructor(FTD, CD); | |||
2138 | AddedAny = true; | |||
2139 | } | |||
2140 | ||||
2141 | // C++17 [over.match.class.deduct] | |||
2142 | // -- If C is not defined or does not declare any constructors, an | |||
2143 | // additional function template derived as above from a hypothetical | |||
2144 | // constructor C(). | |||
2145 | if (!AddedAny) | |||
2146 | Transform.buildSimpleDeductionGuide(None); | |||
2147 | ||||
2148 | // -- An additional function template derived as above from a hypothetical | |||
2149 | // constructor C(C), called the copy deduction candidate. | |||
2150 | cast<CXXDeductionGuideDecl>( | |||
2151 | cast<FunctionTemplateDecl>( | |||
2152 | Transform.buildSimpleDeductionGuide(Transform.DeducedType)) | |||
2153 | ->getTemplatedDecl()) | |||
2154 | ->setIsCopyDeductionCandidate(); | |||
2155 | } | |||
2156 | ||||
2157 | /// Diagnose the presence of a default template argument on a | |||
2158 | /// template parameter, which is ill-formed in certain contexts. | |||
2159 | /// | |||
2160 | /// \returns true if the default template argument should be dropped. | |||
2161 | static bool DiagnoseDefaultTemplateArgument(Sema &S, | |||
2162 | Sema::TemplateParamListContext TPC, | |||
2163 | SourceLocation ParamLoc, | |||
2164 | SourceRange DefArgRange) { | |||
2165 | switch (TPC) { | |||
2166 | case Sema::TPC_ClassTemplate: | |||
2167 | case Sema::TPC_VarTemplate: | |||
2168 | case Sema::TPC_TypeAliasTemplate: | |||
2169 | return false; | |||
2170 | ||||
2171 | case Sema::TPC_FunctionTemplate: | |||
2172 | case Sema::TPC_FriendFunctionTemplateDefinition: | |||
2173 | // C++ [temp.param]p9: | |||
2174 | // A default template-argument shall not be specified in a | |||
2175 | // function template declaration or a function template | |||
2176 | // definition [...] | |||
2177 | // If a friend function template declaration specifies a default | |||
2178 | // template-argument, that declaration shall be a definition and shall be | |||
2179 | // the only declaration of the function template in the translation unit. | |||
2180 | // (C++98/03 doesn't have this wording; see DR226). | |||
2181 | S.Diag(ParamLoc, S.getLangOpts().CPlusPlus11 ? | |||
2182 | diag::warn_cxx98_compat_template_parameter_default_in_function_template | |||
2183 | : diag::ext_template_parameter_default_in_function_template) | |||
2184 | << DefArgRange; | |||
2185 | return false; | |||
2186 | ||||
2187 | case Sema::TPC_ClassTemplateMember: | |||
2188 | // C++0x [temp.param]p9: | |||
2189 | // A default template-argument shall not be specified in the | |||
2190 | // template-parameter-lists of the definition of a member of a | |||
2191 | // class template that appears outside of the member's class. | |||
2192 | S.Diag(ParamLoc, diag::err_template_parameter_default_template_member) | |||
2193 | << DefArgRange; | |||
2194 | return true; | |||
2195 | ||||
2196 | case Sema::TPC_FriendClassTemplate: | |||
2197 | case Sema::TPC_FriendFunctionTemplate: | |||
2198 | // C++ [temp.param]p9: | |||
2199 | // A default template-argument shall not be specified in a | |||
2200 | // friend template declaration. | |||
2201 | S.Diag(ParamLoc, diag::err_template_parameter_default_friend_template) | |||
2202 | << DefArgRange; | |||
2203 | return true; | |||
2204 | ||||
2205 | // FIXME: C++0x [temp.param]p9 allows default template-arguments | |||
2206 | // for friend function templates if there is only a single | |||
2207 | // declaration (and it is a definition). Strange! | |||
2208 | } | |||
2209 | ||||
2210 | llvm_unreachable("Invalid TemplateParamListContext!")::llvm::llvm_unreachable_internal("Invalid TemplateParamListContext!" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 2210); | |||
2211 | } | |||
2212 | ||||
2213 | /// Check for unexpanded parameter packs within the template parameters | |||
2214 | /// of a template template parameter, recursively. | |||
2215 | static bool DiagnoseUnexpandedParameterPacks(Sema &S, | |||
2216 | TemplateTemplateParmDecl *TTP) { | |||
2217 | // A template template parameter which is a parameter pack is also a pack | |||
2218 | // expansion. | |||
2219 | if (TTP->isParameterPack()) | |||
2220 | return false; | |||
2221 | ||||
2222 | TemplateParameterList *Params = TTP->getTemplateParameters(); | |||
2223 | for (unsigned I = 0, N = Params->size(); I != N; ++I) { | |||
2224 | NamedDecl *P = Params->getParam(I); | |||
2225 | if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(P)) { | |||
2226 | if (!NTTP->isParameterPack() && | |||
2227 | S.DiagnoseUnexpandedParameterPack(NTTP->getLocation(), | |||
2228 | NTTP->getTypeSourceInfo(), | |||
2229 | Sema::UPPC_NonTypeTemplateParameterType)) | |||
2230 | return true; | |||
2231 | ||||
2232 | continue; | |||
2233 | } | |||
2234 | ||||
2235 | if (TemplateTemplateParmDecl *InnerTTP | |||
2236 | = dyn_cast<TemplateTemplateParmDecl>(P)) | |||
2237 | if (DiagnoseUnexpandedParameterPacks(S, InnerTTP)) | |||
2238 | return true; | |||
2239 | } | |||
2240 | ||||
2241 | return false; | |||
2242 | } | |||
2243 | ||||
2244 | /// Checks the validity of a template parameter list, possibly | |||
2245 | /// considering the template parameter list from a previous | |||
2246 | /// declaration. | |||
2247 | /// | |||
2248 | /// If an "old" template parameter list is provided, it must be | |||
2249 | /// equivalent (per TemplateParameterListsAreEqual) to the "new" | |||
2250 | /// template parameter list. | |||
2251 | /// | |||
2252 | /// \param NewParams Template parameter list for a new template | |||
2253 | /// declaration. This template parameter list will be updated with any | |||
2254 | /// default arguments that are carried through from the previous | |||
2255 | /// template parameter list. | |||
2256 | /// | |||
2257 | /// \param OldParams If provided, template parameter list from a | |||
2258 | /// previous declaration of the same template. Default template | |||
2259 | /// arguments will be merged from the old template parameter list to | |||
2260 | /// the new template parameter list. | |||
2261 | /// | |||
2262 | /// \param TPC Describes the context in which we are checking the given | |||
2263 | /// template parameter list. | |||
2264 | /// | |||
2265 | /// \param SkipBody If we might have already made a prior merged definition | |||
2266 | /// of this template visible, the corresponding body-skipping information. | |||
2267 | /// Default argument redefinition is not an error when skipping such a body, | |||
2268 | /// because (under the ODR) we can assume the default arguments are the same | |||
2269 | /// as the prior merged definition. | |||
2270 | /// | |||
2271 | /// \returns true if an error occurred, false otherwise. | |||
2272 | bool Sema::CheckTemplateParameterList(TemplateParameterList *NewParams, | |||
2273 | TemplateParameterList *OldParams, | |||
2274 | TemplateParamListContext TPC, | |||
2275 | SkipBodyInfo *SkipBody) { | |||
2276 | bool Invalid = false; | |||
2277 | ||||
2278 | // C++ [temp.param]p10: | |||
2279 | // The set of default template-arguments available for use with a | |||
2280 | // template declaration or definition is obtained by merging the | |||
2281 | // default arguments from the definition (if in scope) and all | |||
2282 | // declarations in scope in the same way default function | |||
2283 | // arguments are (8.3.6). | |||
2284 | bool SawDefaultArgument = false; | |||
2285 | SourceLocation PreviousDefaultArgLoc; | |||
2286 | ||||
2287 | // Dummy initialization to avoid warnings. | |||
2288 | TemplateParameterList::iterator OldParam = NewParams->end(); | |||
2289 | if (OldParams) | |||
2290 | OldParam = OldParams->begin(); | |||
2291 | ||||
2292 | bool RemoveDefaultArguments = false; | |||
2293 | for (TemplateParameterList::iterator NewParam = NewParams->begin(), | |||
2294 | NewParamEnd = NewParams->end(); | |||
2295 | NewParam != NewParamEnd; ++NewParam) { | |||
2296 | // Variables used to diagnose redundant default arguments | |||
2297 | bool RedundantDefaultArg = false; | |||
2298 | SourceLocation OldDefaultLoc; | |||
2299 | SourceLocation NewDefaultLoc; | |||
2300 | ||||
2301 | // Variable used to diagnose missing default arguments | |||
2302 | bool MissingDefaultArg = false; | |||
2303 | ||||
2304 | // Variable used to diagnose non-final parameter packs | |||
2305 | bool SawParameterPack = false; | |||
2306 | ||||
2307 | if (TemplateTypeParmDecl *NewTypeParm | |||
2308 | = dyn_cast<TemplateTypeParmDecl>(*NewParam)) { | |||
2309 | // Check the presence of a default argument here. | |||
2310 | if (NewTypeParm->hasDefaultArgument() && | |||
2311 | DiagnoseDefaultTemplateArgument(*this, TPC, | |||
2312 | NewTypeParm->getLocation(), | |||
2313 | NewTypeParm->getDefaultArgumentInfo()->getTypeLoc() | |||
2314 | .getSourceRange())) | |||
2315 | NewTypeParm->removeDefaultArgument(); | |||
2316 | ||||
2317 | // Merge default arguments for template type parameters. | |||
2318 | TemplateTypeParmDecl *OldTypeParm | |||
2319 | = OldParams? cast<TemplateTypeParmDecl>(*OldParam) : nullptr; | |||
2320 | if (NewTypeParm->isParameterPack()) { | |||
2321 | assert(!NewTypeParm->hasDefaultArgument() &&((!NewTypeParm->hasDefaultArgument() && "Parameter packs can't have a default argument!" ) ? static_cast<void> (0) : __assert_fail ("!NewTypeParm->hasDefaultArgument() && \"Parameter packs can't have a default argument!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 2322, __PRETTY_FUNCTION__)) | |||
2322 | "Parameter packs can't have a default argument!")((!NewTypeParm->hasDefaultArgument() && "Parameter packs can't have a default argument!" ) ? static_cast<void> (0) : __assert_fail ("!NewTypeParm->hasDefaultArgument() && \"Parameter packs can't have a default argument!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 2322, __PRETTY_FUNCTION__)); | |||
2323 | SawParameterPack = true; | |||
2324 | } else if (OldTypeParm && hasVisibleDefaultArgument(OldTypeParm) && | |||
2325 | NewTypeParm->hasDefaultArgument() && | |||
2326 | (!SkipBody || !SkipBody->ShouldSkip)) { | |||
2327 | OldDefaultLoc = OldTypeParm->getDefaultArgumentLoc(); | |||
2328 | NewDefaultLoc = NewTypeParm->getDefaultArgumentLoc(); | |||
2329 | SawDefaultArgument = true; | |||
2330 | RedundantDefaultArg = true; | |||
2331 | PreviousDefaultArgLoc = NewDefaultLoc; | |||
2332 | } else if (OldTypeParm && OldTypeParm->hasDefaultArgument()) { | |||
2333 | // Merge the default argument from the old declaration to the | |||
2334 | // new declaration. | |||
2335 | NewTypeParm->setInheritedDefaultArgument(Context, OldTypeParm); | |||
2336 | PreviousDefaultArgLoc = OldTypeParm->getDefaultArgumentLoc(); | |||
2337 | } else if (NewTypeParm->hasDefaultArgument()) { | |||
2338 | SawDefaultArgument = true; | |||
2339 | PreviousDefaultArgLoc = NewTypeParm->getDefaultArgumentLoc(); | |||
2340 | } else if (SawDefaultArgument) | |||
2341 | MissingDefaultArg = true; | |||
2342 | } else if (NonTypeTemplateParmDecl *NewNonTypeParm | |||
2343 | = dyn_cast<NonTypeTemplateParmDecl>(*NewParam)) { | |||
2344 | // Check for unexpanded parameter packs. | |||
2345 | if (!NewNonTypeParm->isParameterPack() && | |||
2346 | DiagnoseUnexpandedParameterPack(NewNonTypeParm->getLocation(), | |||
2347 | NewNonTypeParm->getTypeSourceInfo(), | |||
2348 | UPPC_NonTypeTemplateParameterType)) { | |||
2349 | Invalid = true; | |||
2350 | continue; | |||
2351 | } | |||
2352 | ||||
2353 | // Check the presence of a default argument here. | |||
2354 | if (NewNonTypeParm->hasDefaultArgument() && | |||
2355 | DiagnoseDefaultTemplateArgument(*this, TPC, | |||
2356 | NewNonTypeParm->getLocation(), | |||
2357 | NewNonTypeParm->getDefaultArgument()->getSourceRange())) { | |||
2358 | NewNonTypeParm->removeDefaultArgument(); | |||
2359 | } | |||
2360 | ||||
2361 | // Merge default arguments for non-type template parameters | |||
2362 | NonTypeTemplateParmDecl *OldNonTypeParm | |||
2363 | = OldParams? cast<NonTypeTemplateParmDecl>(*OldParam) : nullptr; | |||
2364 | if (NewNonTypeParm->isParameterPack()) { | |||
2365 | assert(!NewNonTypeParm->hasDefaultArgument() &&((!NewNonTypeParm->hasDefaultArgument() && "Parameter packs can't have a default argument!" ) ? static_cast<void> (0) : __assert_fail ("!NewNonTypeParm->hasDefaultArgument() && \"Parameter packs can't have a default argument!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 2366, __PRETTY_FUNCTION__)) | |||
2366 | "Parameter packs can't have a default argument!")((!NewNonTypeParm->hasDefaultArgument() && "Parameter packs can't have a default argument!" ) ? static_cast<void> (0) : __assert_fail ("!NewNonTypeParm->hasDefaultArgument() && \"Parameter packs can't have a default argument!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 2366, __PRETTY_FUNCTION__)); | |||
2367 | if (!NewNonTypeParm->isPackExpansion()) | |||
2368 | SawParameterPack = true; | |||
2369 | } else if (OldNonTypeParm && hasVisibleDefaultArgument(OldNonTypeParm) && | |||
2370 | NewNonTypeParm->hasDefaultArgument() && | |||
2371 | (!SkipBody || !SkipBody->ShouldSkip)) { | |||
2372 | OldDefaultLoc = OldNonTypeParm->getDefaultArgumentLoc(); | |||
2373 | NewDefaultLoc = NewNonTypeParm->getDefaultArgumentLoc(); | |||
2374 | SawDefaultArgument = true; | |||
2375 | RedundantDefaultArg = true; | |||
2376 | PreviousDefaultArgLoc = NewDefaultLoc; | |||
2377 | } else if (OldNonTypeParm && OldNonTypeParm->hasDefaultArgument()) { | |||
2378 | // Merge the default argument from the old declaration to the | |||
2379 | // new declaration. | |||
2380 | NewNonTypeParm->setInheritedDefaultArgument(Context, OldNonTypeParm); | |||
2381 | PreviousDefaultArgLoc = OldNonTypeParm->getDefaultArgumentLoc(); | |||
2382 | } else if (NewNonTypeParm->hasDefaultArgument()) { | |||
2383 | SawDefaultArgument = true; | |||
2384 | PreviousDefaultArgLoc = NewNonTypeParm->getDefaultArgumentLoc(); | |||
2385 | } else if (SawDefaultArgument) | |||
2386 | MissingDefaultArg = true; | |||
2387 | } else { | |||
2388 | TemplateTemplateParmDecl *NewTemplateParm | |||
2389 | = cast<TemplateTemplateParmDecl>(*NewParam); | |||
2390 | ||||
2391 | // Check for unexpanded parameter packs, recursively. | |||
2392 | if (::DiagnoseUnexpandedParameterPacks(*this, NewTemplateParm)) { | |||
2393 | Invalid = true; | |||
2394 | continue; | |||
2395 | } | |||
2396 | ||||
2397 | // Check the presence of a default argument here. | |||
2398 | if (NewTemplateParm->hasDefaultArgument() && | |||
2399 | DiagnoseDefaultTemplateArgument(*this, TPC, | |||
2400 | NewTemplateParm->getLocation(), | |||
2401 | NewTemplateParm->getDefaultArgument().getSourceRange())) | |||
2402 | NewTemplateParm->removeDefaultArgument(); | |||
2403 | ||||
2404 | // Merge default arguments for template template parameters | |||
2405 | TemplateTemplateParmDecl *OldTemplateParm | |||
2406 | = OldParams? cast<TemplateTemplateParmDecl>(*OldParam) : nullptr; | |||
2407 | if (NewTemplateParm->isParameterPack()) { | |||
2408 | assert(!NewTemplateParm->hasDefaultArgument() &&((!NewTemplateParm->hasDefaultArgument() && "Parameter packs can't have a default argument!" ) ? static_cast<void> (0) : __assert_fail ("!NewTemplateParm->hasDefaultArgument() && \"Parameter packs can't have a default argument!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 2409, __PRETTY_FUNCTION__)) | |||
2409 | "Parameter packs can't have a default argument!")((!NewTemplateParm->hasDefaultArgument() && "Parameter packs can't have a default argument!" ) ? static_cast<void> (0) : __assert_fail ("!NewTemplateParm->hasDefaultArgument() && \"Parameter packs can't have a default argument!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 2409, __PRETTY_FUNCTION__)); | |||
2410 | if (!NewTemplateParm->isPackExpansion()) | |||
2411 | SawParameterPack = true; | |||
2412 | } else if (OldTemplateParm && | |||
2413 | hasVisibleDefaultArgument(OldTemplateParm) && | |||
2414 | NewTemplateParm->hasDefaultArgument() && | |||
2415 | (!SkipBody || !SkipBody->ShouldSkip)) { | |||
2416 | OldDefaultLoc = OldTemplateParm->getDefaultArgument().getLocation(); | |||
2417 | NewDefaultLoc = NewTemplateParm->getDefaultArgument().getLocation(); | |||
2418 | SawDefaultArgument = true; | |||
2419 | RedundantDefaultArg = true; | |||
2420 | PreviousDefaultArgLoc = NewDefaultLoc; | |||
2421 | } else if (OldTemplateParm && OldTemplateParm->hasDefaultArgument()) { | |||
2422 | // Merge the default argument from the old declaration to the | |||
2423 | // new declaration. | |||
2424 | NewTemplateParm->setInheritedDefaultArgument(Context, OldTemplateParm); | |||
2425 | PreviousDefaultArgLoc | |||
2426 | = OldTemplateParm->getDefaultArgument().getLocation(); | |||
2427 | } else if (NewTemplateParm->hasDefaultArgument()) { | |||
2428 | SawDefaultArgument = true; | |||
2429 | PreviousDefaultArgLoc | |||
2430 | = NewTemplateParm->getDefaultArgument().getLocation(); | |||
2431 | } else if (SawDefaultArgument) | |||
2432 | MissingDefaultArg = true; | |||
2433 | } | |||
2434 | ||||
2435 | // C++11 [temp.param]p11: | |||
2436 | // If a template parameter of a primary class template or alias template | |||
2437 | // is a template parameter pack, it shall be the last template parameter. | |||
2438 | if (SawParameterPack && (NewParam + 1) != NewParamEnd && | |||
2439 | (TPC == TPC_ClassTemplate || TPC == TPC_VarTemplate || | |||
2440 | TPC == TPC_TypeAliasTemplate)) { | |||
2441 | Diag((*NewParam)->getLocation(), | |||
2442 | diag::err_template_param_pack_must_be_last_template_parameter); | |||
2443 | Invalid = true; | |||
2444 | } | |||
2445 | ||||
2446 | if (RedundantDefaultArg) { | |||
2447 | // C++ [temp.param]p12: | |||
2448 | // A template-parameter shall not be given default arguments | |||
2449 | // by two different declarations in the same scope. | |||
2450 | Diag(NewDefaultLoc, diag::err_template_param_default_arg_redefinition); | |||
2451 | Diag(OldDefaultLoc, diag::note_template_param_prev_default_arg); | |||
2452 | Invalid = true; | |||
2453 | } else if (MissingDefaultArg && TPC != TPC_FunctionTemplate) { | |||
2454 | // C++ [temp.param]p11: | |||
2455 | // If a template-parameter of a class template has a default | |||
2456 | // template-argument, each subsequent template-parameter shall either | |||
2457 | // have a default template-argument supplied or be a template parameter | |||
2458 | // pack. | |||
2459 | Diag((*NewParam)->getLocation(), | |||
2460 | diag::err_template_param_default_arg_missing); | |||
2461 | Diag(PreviousDefaultArgLoc, diag::note_template_param_prev_default_arg); | |||
2462 | Invalid = true; | |||
2463 | RemoveDefaultArguments = true; | |||
2464 | } | |||
2465 | ||||
2466 | // If we have an old template parameter list that we're merging | |||
2467 | // in, move on to the next parameter. | |||
2468 | if (OldParams) | |||
2469 | ++OldParam; | |||
2470 | } | |||
2471 | ||||
2472 | // We were missing some default arguments at the end of the list, so remove | |||
2473 | // all of the default arguments. | |||
2474 | if (RemoveDefaultArguments) { | |||
2475 | for (TemplateParameterList::iterator NewParam = NewParams->begin(), | |||
2476 | NewParamEnd = NewParams->end(); | |||
2477 | NewParam != NewParamEnd; ++NewParam) { | |||
2478 | if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*NewParam)) | |||
2479 | TTP->removeDefaultArgument(); | |||
2480 | else if (NonTypeTemplateParmDecl *NTTP | |||
2481 | = dyn_cast<NonTypeTemplateParmDecl>(*NewParam)) | |||
2482 | NTTP->removeDefaultArgument(); | |||
2483 | else | |||
2484 | cast<TemplateTemplateParmDecl>(*NewParam)->removeDefaultArgument(); | |||
2485 | } | |||
2486 | } | |||
2487 | ||||
2488 | return Invalid; | |||
2489 | } | |||
2490 | ||||
2491 | namespace { | |||
2492 | ||||
2493 | /// A class which looks for a use of a certain level of template | |||
2494 | /// parameter. | |||
2495 | struct DependencyChecker : RecursiveASTVisitor<DependencyChecker> { | |||
2496 | typedef RecursiveASTVisitor<DependencyChecker> super; | |||
2497 | ||||
2498 | unsigned Depth; | |||
2499 | ||||
2500 | // Whether we're looking for a use of a template parameter that makes the | |||
2501 | // overall construct type-dependent / a dependent type. This is strictly | |||
2502 | // best-effort for now; we may fail to match at all for a dependent type | |||
2503 | // in some cases if this is set. | |||
2504 | bool IgnoreNonTypeDependent; | |||
2505 | ||||
2506 | bool Match; | |||
2507 | SourceLocation MatchLoc; | |||
2508 | ||||
2509 | DependencyChecker(unsigned Depth, bool IgnoreNonTypeDependent) | |||
2510 | : Depth(Depth), IgnoreNonTypeDependent(IgnoreNonTypeDependent), | |||
2511 | Match(false) {} | |||
2512 | ||||
2513 | DependencyChecker(TemplateParameterList *Params, bool IgnoreNonTypeDependent) | |||
2514 | : IgnoreNonTypeDependent(IgnoreNonTypeDependent), Match(false) { | |||
2515 | NamedDecl *ND = Params->getParam(0); | |||
2516 | if (TemplateTypeParmDecl *PD = dyn_cast<TemplateTypeParmDecl>(ND)) { | |||
2517 | Depth = PD->getDepth(); | |||
2518 | } else if (NonTypeTemplateParmDecl *PD = | |||
2519 | dyn_cast<NonTypeTemplateParmDecl>(ND)) { | |||
2520 | Depth = PD->getDepth(); | |||
2521 | } else { | |||
2522 | Depth = cast<TemplateTemplateParmDecl>(ND)->getDepth(); | |||
2523 | } | |||
2524 | } | |||
2525 | ||||
2526 | bool Matches(unsigned ParmDepth, SourceLocation Loc = SourceLocation()) { | |||
2527 | if (ParmDepth >= Depth) { | |||
2528 | Match = true; | |||
2529 | MatchLoc = Loc; | |||
2530 | return true; | |||
2531 | } | |||
2532 | return false; | |||
2533 | } | |||
2534 | ||||
2535 | bool TraverseStmt(Stmt *S, DataRecursionQueue *Q = nullptr) { | |||
2536 | // Prune out non-type-dependent expressions if requested. This can | |||
2537 | // sometimes result in us failing to find a template parameter reference | |||
2538 | // (if a value-dependent expression creates a dependent type), but this | |||
2539 | // mode is best-effort only. | |||
2540 | if (auto *E = dyn_cast_or_null<Expr>(S)) | |||
2541 | if (IgnoreNonTypeDependent && !E->isTypeDependent()) | |||
2542 | return true; | |||
2543 | return super::TraverseStmt(S, Q); | |||
2544 | } | |||
2545 | ||||
2546 | bool TraverseTypeLoc(TypeLoc TL) { | |||
2547 | if (IgnoreNonTypeDependent && !TL.isNull() && | |||
2548 | !TL.getType()->isDependentType()) | |||
2549 | return true; | |||
2550 | return super::TraverseTypeLoc(TL); | |||
2551 | } | |||
2552 | ||||
2553 | bool VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) { | |||
2554 | return !Matches(TL.getTypePtr()->getDepth(), TL.getNameLoc()); | |||
2555 | } | |||
2556 | ||||
2557 | bool VisitTemplateTypeParmType(const TemplateTypeParmType *T) { | |||
2558 | // For a best-effort search, keep looking until we find a location. | |||
2559 | return IgnoreNonTypeDependent || !Matches(T->getDepth()); | |||
2560 | } | |||
2561 | ||||
2562 | bool TraverseTemplateName(TemplateName N) { | |||
2563 | if (TemplateTemplateParmDecl *PD = | |||
2564 | dyn_cast_or_null<TemplateTemplateParmDecl>(N.getAsTemplateDecl())) | |||
2565 | if (Matches(PD->getDepth())) | |||
2566 | return false; | |||
2567 | return super::TraverseTemplateName(N); | |||
2568 | } | |||
2569 | ||||
2570 | bool VisitDeclRefExpr(DeclRefExpr *E) { | |||
2571 | if (NonTypeTemplateParmDecl *PD = | |||
2572 | dyn_cast<NonTypeTemplateParmDecl>(E->getDecl())) | |||
2573 | if (Matches(PD->getDepth(), E->getExprLoc())) | |||
2574 | return false; | |||
2575 | return super::VisitDeclRefExpr(E); | |||
2576 | } | |||
2577 | ||||
2578 | bool VisitSubstTemplateTypeParmType(const SubstTemplateTypeParmType *T) { | |||
2579 | return TraverseType(T->getReplacementType()); | |||
2580 | } | |||
2581 | ||||
2582 | bool | |||
2583 | VisitSubstTemplateTypeParmPackType(const SubstTemplateTypeParmPackType *T) { | |||
2584 | return TraverseTemplateArgument(T->getArgumentPack()); | |||
2585 | } | |||
2586 | ||||
2587 | bool TraverseInjectedClassNameType(const InjectedClassNameType *T) { | |||
2588 | return TraverseType(T->getInjectedSpecializationType()); | |||
2589 | } | |||
2590 | }; | |||
2591 | } // end anonymous namespace | |||
2592 | ||||
2593 | /// Determines whether a given type depends on the given parameter | |||
2594 | /// list. | |||
2595 | static bool | |||
2596 | DependsOnTemplateParameters(QualType T, TemplateParameterList *Params) { | |||
2597 | DependencyChecker Checker(Params, /*IgnoreNonTypeDependent*/false); | |||
2598 | Checker.TraverseType(T); | |||
2599 | return Checker.Match; | |||
2600 | } | |||
2601 | ||||
2602 | // Find the source range corresponding to the named type in the given | |||
2603 | // nested-name-specifier, if any. | |||
2604 | static SourceRange getRangeOfTypeInNestedNameSpecifier(ASTContext &Context, | |||
2605 | QualType T, | |||
2606 | const CXXScopeSpec &SS) { | |||
2607 | NestedNameSpecifierLoc NNSLoc(SS.getScopeRep(), SS.location_data()); | |||
2608 | while (NestedNameSpecifier *NNS = NNSLoc.getNestedNameSpecifier()) { | |||
2609 | if (const Type *CurType = NNS->getAsType()) { | |||
2610 | if (Context.hasSameUnqualifiedType(T, QualType(CurType, 0))) | |||
2611 | return NNSLoc.getTypeLoc().getSourceRange(); | |||
2612 | } else | |||
2613 | break; | |||
2614 | ||||
2615 | NNSLoc = NNSLoc.getPrefix(); | |||
2616 | } | |||
2617 | ||||
2618 | return SourceRange(); | |||
2619 | } | |||
2620 | ||||
2621 | /// Match the given template parameter lists to the given scope | |||
2622 | /// specifier, returning the template parameter list that applies to the | |||
2623 | /// name. | |||
2624 | /// | |||
2625 | /// \param DeclStartLoc the start of the declaration that has a scope | |||
2626 | /// specifier or a template parameter list. | |||
2627 | /// | |||
2628 | /// \param DeclLoc The location of the declaration itself. | |||
2629 | /// | |||
2630 | /// \param SS the scope specifier that will be matched to the given template | |||
2631 | /// parameter lists. This scope specifier precedes a qualified name that is | |||
2632 | /// being declared. | |||
2633 | /// | |||
2634 | /// \param TemplateId The template-id following the scope specifier, if there | |||
2635 | /// is one. Used to check for a missing 'template<>'. | |||
2636 | /// | |||
2637 | /// \param ParamLists the template parameter lists, from the outermost to the | |||
2638 | /// innermost template parameter lists. | |||
2639 | /// | |||
2640 | /// \param IsFriend Whether to apply the slightly different rules for | |||
2641 | /// matching template parameters to scope specifiers in friend | |||
2642 | /// declarations. | |||
2643 | /// | |||
2644 | /// \param IsMemberSpecialization will be set true if the scope specifier | |||
2645 | /// denotes a fully-specialized type, and therefore this is a declaration of | |||
2646 | /// a member specialization. | |||
2647 | /// | |||
2648 | /// \returns the template parameter list, if any, that corresponds to the | |||
2649 | /// name that is preceded by the scope specifier @p SS. This template | |||
2650 | /// parameter list may have template parameters (if we're declaring a | |||
2651 | /// template) or may have no template parameters (if we're declaring a | |||
2652 | /// template specialization), or may be NULL (if what we're declaring isn't | |||
2653 | /// itself a template). | |||
2654 | TemplateParameterList *Sema::MatchTemplateParametersToScopeSpecifier( | |||
2655 | SourceLocation DeclStartLoc, SourceLocation DeclLoc, const CXXScopeSpec &SS, | |||
2656 | TemplateIdAnnotation *TemplateId, | |||
2657 | ArrayRef<TemplateParameterList *> ParamLists, bool IsFriend, | |||
2658 | bool &IsMemberSpecialization, bool &Invalid) { | |||
2659 | IsMemberSpecialization = false; | |||
2660 | Invalid = false; | |||
2661 | ||||
2662 | // The sequence of nested types to which we will match up the template | |||
2663 | // parameter lists. We first build this list by starting with the type named | |||
2664 | // by the nested-name-specifier and walking out until we run out of types. | |||
2665 | SmallVector<QualType, 4> NestedTypes; | |||
2666 | QualType T; | |||
2667 | if (SS.getScopeRep()) { | |||
2668 | if (CXXRecordDecl *Record | |||
2669 | = dyn_cast_or_null<CXXRecordDecl>(computeDeclContext(SS, true))) | |||
2670 | T = Context.getTypeDeclType(Record); | |||
2671 | else | |||
2672 | T = QualType(SS.getScopeRep()->getAsType(), 0); | |||
2673 | } | |||
2674 | ||||
2675 | // If we found an explicit specialization that prevents us from needing | |||
2676 | // 'template<>' headers, this will be set to the location of that | |||
2677 | // explicit specialization. | |||
2678 | SourceLocation ExplicitSpecLoc; | |||
2679 | ||||
2680 | while (!T.isNull()) { | |||
2681 | NestedTypes.push_back(T); | |||
2682 | ||||
2683 | // Retrieve the parent of a record type. | |||
2684 | if (CXXRecordDecl *Record = T->getAsCXXRecordDecl()) { | |||
2685 | // If this type is an explicit specialization, we're done. | |||
2686 | if (ClassTemplateSpecializationDecl *Spec | |||
2687 | = dyn_cast<ClassTemplateSpecializationDecl>(Record)) { | |||
2688 | if (!isa<ClassTemplatePartialSpecializationDecl>(Spec) && | |||
2689 | Spec->getSpecializationKind() == TSK_ExplicitSpecialization) { | |||
2690 | ExplicitSpecLoc = Spec->getLocation(); | |||
2691 | break; | |||
2692 | } | |||
2693 | } else if (Record->getTemplateSpecializationKind() | |||
2694 | == TSK_ExplicitSpecialization) { | |||
2695 | ExplicitSpecLoc = Record->getLocation(); | |||
2696 | break; | |||
2697 | } | |||
2698 | ||||
2699 | if (TypeDecl *Parent = dyn_cast<TypeDecl>(Record->getParent())) | |||
2700 | T = Context.getTypeDeclType(Parent); | |||
2701 | else | |||
2702 | T = QualType(); | |||
2703 | continue; | |||
2704 | } | |||
2705 | ||||
2706 | if (const TemplateSpecializationType *TST | |||
2707 | = T->getAs<TemplateSpecializationType>()) { | |||
2708 | if (TemplateDecl *Template = TST->getTemplateName().getAsTemplateDecl()) { | |||
2709 | if (TypeDecl *Parent = dyn_cast<TypeDecl>(Template->getDeclContext())) | |||
2710 | T = Context.getTypeDeclType(Parent); | |||
2711 | else | |||
2712 | T = QualType(); | |||
2713 | continue; | |||
2714 | } | |||
2715 | } | |||
2716 | ||||
2717 | // Look one step prior in a dependent template specialization type. | |||
2718 | if (const DependentTemplateSpecializationType *DependentTST | |||
2719 | = T->getAs<DependentTemplateSpecializationType>()) { | |||
2720 | if (NestedNameSpecifier *NNS = DependentTST->getQualifier()) | |||
2721 | T = QualType(NNS->getAsType(), 0); | |||
2722 | else | |||
2723 | T = QualType(); | |||
2724 | continue; | |||
2725 | } | |||
2726 | ||||
2727 | // Look one step prior in a dependent name type. | |||
2728 | if (const DependentNameType *DependentName = T->getAs<DependentNameType>()){ | |||
2729 | if (NestedNameSpecifier *NNS = DependentName->getQualifier()) | |||
2730 | T = QualType(NNS->getAsType(), 0); | |||
2731 | else | |||
2732 | T = QualType(); | |||
2733 | continue; | |||
2734 | } | |||
2735 | ||||
2736 | // Retrieve the parent of an enumeration type. | |||
2737 | if (const EnumType *EnumT = T->getAs<EnumType>()) { | |||
2738 | // FIXME: Forward-declared enums require a TSK_ExplicitSpecialization | |||
2739 | // check here. | |||
2740 | EnumDecl *Enum = EnumT->getDecl(); | |||
2741 | ||||
2742 | // Get to the parent type. | |||
2743 | if (TypeDecl *Parent = dyn_cast<TypeDecl>(Enum->getParent())) | |||
2744 | T = Context.getTypeDeclType(Parent); | |||
2745 | else | |||
2746 | T = QualType(); | |||
2747 | continue; | |||
2748 | } | |||
2749 | ||||
2750 | T = QualType(); | |||
2751 | } | |||
2752 | // Reverse the nested types list, since we want to traverse from the outermost | |||
2753 | // to the innermost while checking template-parameter-lists. | |||
2754 | std::reverse(NestedTypes.begin(), NestedTypes.end()); | |||
2755 | ||||
2756 | // C++0x [temp.expl.spec]p17: | |||
2757 | // A member or a member template may be nested within many | |||
2758 | // enclosing class templates. In an explicit specialization for | |||
2759 | // such a member, the member declaration shall be preceded by a | |||
2760 | // template<> for each enclosing class template that is | |||
2761 | // explicitly specialized. | |||
2762 | bool SawNonEmptyTemplateParameterList = false; | |||
2763 | ||||
2764 | auto CheckExplicitSpecialization = [&](SourceRange Range, bool Recovery) { | |||
2765 | if (SawNonEmptyTemplateParameterList) { | |||
2766 | Diag(DeclLoc, diag::err_specialize_member_of_template) | |||
2767 | << !Recovery << Range; | |||
2768 | Invalid = true; | |||
2769 | IsMemberSpecialization = false; | |||
2770 | return true; | |||
2771 | } | |||
2772 | ||||
2773 | return false; | |||
2774 | }; | |||
2775 | ||||
2776 | auto DiagnoseMissingExplicitSpecialization = [&] (SourceRange Range) { | |||
2777 | // Check that we can have an explicit specialization here. | |||
2778 | if (CheckExplicitSpecialization(Range, true)) | |||
2779 | return true; | |||
2780 | ||||
2781 | // We don't have a template header, but we should. | |||
2782 | SourceLocation ExpectedTemplateLoc; | |||
2783 | if (!ParamLists.empty()) | |||
2784 | ExpectedTemplateLoc = ParamLists[0]->getTemplateLoc(); | |||
2785 | else | |||
2786 | ExpectedTemplateLoc = DeclStartLoc; | |||
2787 | ||||
2788 | Diag(DeclLoc, diag::err_template_spec_needs_header) | |||
2789 | << Range | |||
2790 | << FixItHint::CreateInsertion(ExpectedTemplateLoc, "template<> "); | |||
2791 | return false; | |||
2792 | }; | |||
2793 | ||||
2794 | unsigned ParamIdx = 0; | |||
2795 | for (unsigned TypeIdx = 0, NumTypes = NestedTypes.size(); TypeIdx != NumTypes; | |||
2796 | ++TypeIdx) { | |||
2797 | T = NestedTypes[TypeIdx]; | |||
2798 | ||||
2799 | // Whether we expect a 'template<>' header. | |||
2800 | bool NeedEmptyTemplateHeader = false; | |||
2801 | ||||
2802 | // Whether we expect a template header with parameters. | |||
2803 | bool NeedNonemptyTemplateHeader = false; | |||
2804 | ||||
2805 | // For a dependent type, the set of template parameters that we | |||
2806 | // expect to see. | |||
2807 | TemplateParameterList *ExpectedTemplateParams = nullptr; | |||
2808 | ||||
2809 | // C++0x [temp.expl.spec]p15: | |||
2810 | // A member or a member template may be nested within many enclosing | |||
2811 | // class templates. In an explicit specialization for such a member, the | |||
2812 | // member declaration shall be preceded by a template<> for each | |||
2813 | // enclosing class template that is explicitly specialized. | |||
2814 | if (CXXRecordDecl *Record = T->getAsCXXRecordDecl()) { | |||
2815 | if (ClassTemplatePartialSpecializationDecl *Partial | |||
2816 | = dyn_cast<ClassTemplatePartialSpecializationDecl>(Record)) { | |||
2817 | ExpectedTemplateParams = Partial->getTemplateParameters(); | |||
2818 | NeedNonemptyTemplateHeader = true; | |||
2819 | } else if (Record->isDependentType()) { | |||
2820 | if (Record->getDescribedClassTemplate()) { | |||
2821 | ExpectedTemplateParams = Record->getDescribedClassTemplate() | |||
2822 | ->getTemplateParameters(); | |||
2823 | NeedNonemptyTemplateHeader = true; | |||
2824 | } | |||
2825 | } else if (ClassTemplateSpecializationDecl *Spec | |||
2826 | = dyn_cast<ClassTemplateSpecializationDecl>(Record)) { | |||
2827 | // C++0x [temp.expl.spec]p4: | |||
2828 | // Members of an explicitly specialized class template are defined | |||
2829 | // in the same manner as members of normal classes, and not using | |||
2830 | // the template<> syntax. | |||
2831 | if (Spec->getSpecializationKind() != TSK_ExplicitSpecialization) | |||
2832 | NeedEmptyTemplateHeader = true; | |||
2833 | else | |||
2834 | continue; | |||
2835 | } else if (Record->getTemplateSpecializationKind()) { | |||
2836 | if (Record->getTemplateSpecializationKind() | |||
2837 | != TSK_ExplicitSpecialization && | |||
2838 | TypeIdx == NumTypes - 1) | |||
2839 | IsMemberSpecialization = true; | |||
2840 | ||||
2841 | continue; | |||
2842 | } | |||
2843 | } else if (const TemplateSpecializationType *TST | |||
2844 | = T->getAs<TemplateSpecializationType>()) { | |||
2845 | if (TemplateDecl *Template = TST->getTemplateName().getAsTemplateDecl()) { | |||
2846 | ExpectedTemplateParams = Template->getTemplateParameters(); | |||
2847 | NeedNonemptyTemplateHeader = true; | |||
2848 | } | |||
2849 | } else if (T->getAs<DependentTemplateSpecializationType>()) { | |||
2850 | // FIXME: We actually could/should check the template arguments here | |||
2851 | // against the corresponding template parameter list. | |||
2852 | NeedNonemptyTemplateHeader = false; | |||
2853 | } | |||
2854 | ||||
2855 | // C++ [temp.expl.spec]p16: | |||
2856 | // In an explicit specialization declaration for a member of a class | |||
2857 | // template or a member template that ap- pears in namespace scope, the | |||
2858 | // member template and some of its enclosing class templates may remain | |||
2859 | // unspecialized, except that the declaration shall not explicitly | |||
2860 | // specialize a class member template if its en- closing class templates | |||
2861 | // are not explicitly specialized as well. | |||
2862 | if (ParamIdx < ParamLists.size()) { | |||
2863 | if (ParamLists[ParamIdx]->size() == 0) { | |||
2864 | if (CheckExplicitSpecialization(ParamLists[ParamIdx]->getSourceRange(), | |||
2865 | false)) | |||
2866 | return nullptr; | |||
2867 | } else | |||
2868 | SawNonEmptyTemplateParameterList = true; | |||
2869 | } | |||
2870 | ||||
2871 | if (NeedEmptyTemplateHeader) { | |||
2872 | // If we're on the last of the types, and we need a 'template<>' header | |||
2873 | // here, then it's a member specialization. | |||
2874 | if (TypeIdx == NumTypes - 1) | |||
2875 | IsMemberSpecialization = true; | |||
2876 | ||||
2877 | if (ParamIdx < ParamLists.size()) { | |||
2878 | if (ParamLists[ParamIdx]->size() > 0) { | |||
2879 | // The header has template parameters when it shouldn't. Complain. | |||
2880 | Diag(ParamLists[ParamIdx]->getTemplateLoc(), | |||
2881 | diag::err_template_param_list_matches_nontemplate) | |||
2882 | << T | |||
2883 | << SourceRange(ParamLists[ParamIdx]->getLAngleLoc(), | |||
2884 | ParamLists[ParamIdx]->getRAngleLoc()) | |||
2885 | << getRangeOfTypeInNestedNameSpecifier(Context, T, SS); | |||
2886 | Invalid = true; | |||
2887 | return nullptr; | |||
2888 | } | |||
2889 | ||||
2890 | // Consume this template header. | |||
2891 | ++ParamIdx; | |||
2892 | continue; | |||
2893 | } | |||
2894 | ||||
2895 | if (!IsFriend) | |||
2896 | if (DiagnoseMissingExplicitSpecialization( | |||
2897 | getRangeOfTypeInNestedNameSpecifier(Context, T, SS))) | |||
2898 | return nullptr; | |||
2899 | ||||
2900 | continue; | |||
2901 | } | |||
2902 | ||||
2903 | if (NeedNonemptyTemplateHeader) { | |||
2904 | // In friend declarations we can have template-ids which don't | |||
2905 | // depend on the corresponding template parameter lists. But | |||
2906 | // assume that empty parameter lists are supposed to match this | |||
2907 | // template-id. | |||
2908 | if (IsFriend && T->isDependentType()) { | |||
2909 | if (ParamIdx < ParamLists.size() && | |||
2910 | DependsOnTemplateParameters(T, ParamLists[ParamIdx])) | |||
2911 | ExpectedTemplateParams = nullptr; | |||
2912 | else | |||
2913 | continue; | |||
2914 | } | |||
2915 | ||||
2916 | if (ParamIdx < ParamLists.size()) { | |||
2917 | // Check the template parameter list, if we can. | |||
2918 | if (ExpectedTemplateParams && | |||
2919 | !TemplateParameterListsAreEqual(ParamLists[ParamIdx], | |||
2920 | ExpectedTemplateParams, | |||
2921 | true, TPL_TemplateMatch)) | |||
2922 | Invalid = true; | |||
2923 | ||||
2924 | if (!Invalid && | |||
2925 | CheckTemplateParameterList(ParamLists[ParamIdx], nullptr, | |||
2926 | TPC_ClassTemplateMember)) | |||
2927 | Invalid = true; | |||
2928 | ||||
2929 | ++ParamIdx; | |||
2930 | continue; | |||
2931 | } | |||
2932 | ||||
2933 | Diag(DeclLoc, diag::err_template_spec_needs_template_parameters) | |||
2934 | << T | |||
2935 | << getRangeOfTypeInNestedNameSpecifier(Context, T, SS); | |||
2936 | Invalid = true; | |||
2937 | continue; | |||
2938 | } | |||
2939 | } | |||
2940 | ||||
2941 | // If there were at least as many template-ids as there were template | |||
2942 | // parameter lists, then there are no template parameter lists remaining for | |||
2943 | // the declaration itself. | |||
2944 | if (ParamIdx >= ParamLists.size()) { | |||
2945 | if (TemplateId && !IsFriend) { | |||
2946 | // We don't have a template header for the declaration itself, but we | |||
2947 | // should. | |||
2948 | DiagnoseMissingExplicitSpecialization(SourceRange(TemplateId->LAngleLoc, | |||
2949 | TemplateId->RAngleLoc)); | |||
2950 | ||||
2951 | // Fabricate an empty template parameter list for the invented header. | |||
2952 | return TemplateParameterList::Create(Context, SourceLocation(), | |||
2953 | SourceLocation(), None, | |||
2954 | SourceLocation(), nullptr); | |||
2955 | } | |||
2956 | ||||
2957 | return nullptr; | |||
2958 | } | |||
2959 | ||||
2960 | // If there were too many template parameter lists, complain about that now. | |||
2961 | if (ParamIdx < ParamLists.size() - 1) { | |||
2962 | bool HasAnyExplicitSpecHeader = false; | |||
2963 | bool AllExplicitSpecHeaders = true; | |||
2964 | for (unsigned I = ParamIdx, E = ParamLists.size() - 1; I != E; ++I) { | |||
2965 | if (ParamLists[I]->size() == 0) | |||
2966 | HasAnyExplicitSpecHeader = true; | |||
2967 | else | |||
2968 | AllExplicitSpecHeaders = false; | |||
2969 | } | |||
2970 | ||||
2971 | Diag(ParamLists[ParamIdx]->getTemplateLoc(), | |||
2972 | AllExplicitSpecHeaders ? diag::warn_template_spec_extra_headers | |||
2973 | : diag::err_template_spec_extra_headers) | |||
2974 | << SourceRange(ParamLists[ParamIdx]->getTemplateLoc(), | |||
2975 | ParamLists[ParamLists.size() - 2]->getRAngleLoc()); | |||
2976 | ||||
2977 | // If there was a specialization somewhere, such that 'template<>' is | |||
2978 | // not required, and there were any 'template<>' headers, note where the | |||
2979 | // specialization occurred. | |||
2980 | if (ExplicitSpecLoc.isValid() && HasAnyExplicitSpecHeader) | |||
2981 | Diag(ExplicitSpecLoc, | |||
2982 | diag::note_explicit_template_spec_does_not_need_header) | |||
2983 | << NestedTypes.back(); | |||
2984 | ||||
2985 | // We have a template parameter list with no corresponding scope, which | |||
2986 | // means that the resulting template declaration can't be instantiated | |||
2987 | // properly (we'll end up with dependent nodes when we shouldn't). | |||
2988 | if (!AllExplicitSpecHeaders) | |||
2989 | Invalid = true; | |||
2990 | } | |||
2991 | ||||
2992 | // C++ [temp.expl.spec]p16: | |||
2993 | // In an explicit specialization declaration for a member of a class | |||
2994 | // template or a member template that ap- pears in namespace scope, the | |||
2995 | // member template and some of its enclosing class templates may remain | |||
2996 | // unspecialized, except that the declaration shall not explicitly | |||
2997 | // specialize a class member template if its en- closing class templates | |||
2998 | // are not explicitly specialized as well. | |||
2999 | if (ParamLists.back()->size() == 0 && | |||
3000 | CheckExplicitSpecialization(ParamLists[ParamIdx]->getSourceRange(), | |||
3001 | false)) | |||
3002 | return nullptr; | |||
3003 | ||||
3004 | // Return the last template parameter list, which corresponds to the | |||
3005 | // entity being declared. | |||
3006 | return ParamLists.back(); | |||
3007 | } | |||
3008 | ||||
3009 | void Sema::NoteAllFoundTemplates(TemplateName Name) { | |||
3010 | if (TemplateDecl *Template = Name.getAsTemplateDecl()) { | |||
3011 | Diag(Template->getLocation(), diag::note_template_declared_here) | |||
3012 | << (isa<FunctionTemplateDecl>(Template) | |||
3013 | ? 0 | |||
3014 | : isa<ClassTemplateDecl>(Template) | |||
3015 | ? 1 | |||
3016 | : isa<VarTemplateDecl>(Template) | |||
3017 | ? 2 | |||
3018 | : isa<TypeAliasTemplateDecl>(Template) ? 3 : 4) | |||
3019 | << Template->getDeclName(); | |||
3020 | return; | |||
3021 | } | |||
3022 | ||||
3023 | if (OverloadedTemplateStorage *OST = Name.getAsOverloadedTemplate()) { | |||
3024 | for (OverloadedTemplateStorage::iterator I = OST->begin(), | |||
3025 | IEnd = OST->end(); | |||
3026 | I != IEnd; ++I) | |||
3027 | Diag((*I)->getLocation(), diag::note_template_declared_here) | |||
3028 | << 0 << (*I)->getDeclName(); | |||
3029 | ||||
3030 | return; | |||
3031 | } | |||
3032 | } | |||
3033 | ||||
3034 | static QualType | |||
3035 | checkBuiltinTemplateIdType(Sema &SemaRef, BuiltinTemplateDecl *BTD, | |||
3036 | const SmallVectorImpl<TemplateArgument> &Converted, | |||
3037 | SourceLocation TemplateLoc, | |||
3038 | TemplateArgumentListInfo &TemplateArgs) { | |||
3039 | ASTContext &Context = SemaRef.getASTContext(); | |||
3040 | switch (BTD->getBuiltinTemplateKind()) { | |||
3041 | case BTK__make_integer_seq: { | |||
3042 | // Specializations of __make_integer_seq<S, T, N> are treated like | |||
3043 | // S<T, 0, ..., N-1>. | |||
3044 | ||||
3045 | // C++14 [inteseq.intseq]p1: | |||
3046 | // T shall be an integer type. | |||
3047 | if (!Converted[1].getAsType()->isIntegralType(Context)) { | |||
3048 | SemaRef.Diag(TemplateArgs[1].getLocation(), | |||
3049 | diag::err_integer_sequence_integral_element_type); | |||
3050 | return QualType(); | |||
3051 | } | |||
3052 | ||||
3053 | // C++14 [inteseq.make]p1: | |||
3054 | // If N is negative the program is ill-formed. | |||
3055 | TemplateArgument NumArgsArg = Converted[2]; | |||
3056 | llvm::APSInt NumArgs = NumArgsArg.getAsIntegral(); | |||
3057 | if (NumArgs < 0) { | |||
3058 | SemaRef.Diag(TemplateArgs[2].getLocation(), | |||
3059 | diag::err_integer_sequence_negative_length); | |||
3060 | return QualType(); | |||
3061 | } | |||
3062 | ||||
3063 | QualType ArgTy = NumArgsArg.getIntegralType(); | |||
3064 | TemplateArgumentListInfo SyntheticTemplateArgs; | |||
3065 | // The type argument gets reused as the first template argument in the | |||
3066 | // synthetic template argument list. | |||
3067 | SyntheticTemplateArgs.addArgument(TemplateArgs[1]); | |||
3068 | // Expand N into 0 ... N-1. | |||
3069 | for (llvm::APSInt I(NumArgs.getBitWidth(), NumArgs.isUnsigned()); | |||
3070 | I < NumArgs; ++I) { | |||
3071 | TemplateArgument TA(Context, I, ArgTy); | |||
3072 | SyntheticTemplateArgs.addArgument(SemaRef.getTrivialTemplateArgumentLoc( | |||
3073 | TA, ArgTy, TemplateArgs[2].getLocation())); | |||
3074 | } | |||
3075 | // The first template argument will be reused as the template decl that | |||
3076 | // our synthetic template arguments will be applied to. | |||
3077 | return SemaRef.CheckTemplateIdType(Converted[0].getAsTemplate(), | |||
3078 | TemplateLoc, SyntheticTemplateArgs); | |||
3079 | } | |||
3080 | ||||
3081 | case BTK__type_pack_element: | |||
3082 | // Specializations of | |||
3083 | // __type_pack_element<Index, T_1, ..., T_N> | |||
3084 | // are treated like T_Index. | |||
3085 | assert(Converted.size() == 2 &&((Converted.size() == 2 && "__type_pack_element should be given an index and a parameter pack" ) ? static_cast<void> (0) : __assert_fail ("Converted.size() == 2 && \"__type_pack_element should be given an index and a parameter pack\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 3086, __PRETTY_FUNCTION__)) | |||
3086 | "__type_pack_element should be given an index and a parameter pack")((Converted.size() == 2 && "__type_pack_element should be given an index and a parameter pack" ) ? static_cast<void> (0) : __assert_fail ("Converted.size() == 2 && \"__type_pack_element should be given an index and a parameter pack\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 3086, __PRETTY_FUNCTION__)); | |||
3087 | ||||
3088 | // If the Index is out of bounds, the program is ill-formed. | |||
3089 | TemplateArgument IndexArg = Converted[0], Ts = Converted[1]; | |||
3090 | llvm::APSInt Index = IndexArg.getAsIntegral(); | |||
3091 | assert(Index >= 0 && "the index used with __type_pack_element should be of "((Index >= 0 && "the index used with __type_pack_element should be of " "type std::size_t, and hence be non-negative") ? static_cast <void> (0) : __assert_fail ("Index >= 0 && \"the index used with __type_pack_element should be of \" \"type std::size_t, and hence be non-negative\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 3092, __PRETTY_FUNCTION__)) | |||
3092 | "type std::size_t, and hence be non-negative")((Index >= 0 && "the index used with __type_pack_element should be of " "type std::size_t, and hence be non-negative") ? static_cast <void> (0) : __assert_fail ("Index >= 0 && \"the index used with __type_pack_element should be of \" \"type std::size_t, and hence be non-negative\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 3092, __PRETTY_FUNCTION__)); | |||
3093 | if (Index >= Ts.pack_size()) { | |||
3094 | SemaRef.Diag(TemplateArgs[0].getLocation(), | |||
3095 | diag::err_type_pack_element_out_of_bounds); | |||
3096 | return QualType(); | |||
3097 | } | |||
3098 | ||||
3099 | // We simply return the type at index `Index`. | |||
3100 | auto Nth = std::next(Ts.pack_begin(), Index.getExtValue()); | |||
3101 | return Nth->getAsType(); | |||
3102 | } | |||
3103 | llvm_unreachable("unexpected BuiltinTemplateDecl!")::llvm::llvm_unreachable_internal("unexpected BuiltinTemplateDecl!" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 3103); | |||
3104 | } | |||
3105 | ||||
3106 | /// Determine whether this alias template is "enable_if_t". | |||
3107 | static bool isEnableIfAliasTemplate(TypeAliasTemplateDecl *AliasTemplate) { | |||
3108 | return AliasTemplate->getName().equals("enable_if_t"); | |||
3109 | } | |||
3110 | ||||
3111 | /// Collect all of the separable terms in the given condition, which | |||
3112 | /// might be a conjunction. | |||
3113 | /// | |||
3114 | /// FIXME: The right answer is to convert the logical expression into | |||
3115 | /// disjunctive normal form, so we can find the first failed term | |||
3116 | /// within each possible clause. | |||
3117 | static void collectConjunctionTerms(Expr *Clause, | |||
3118 | SmallVectorImpl<Expr *> &Terms) { | |||
3119 | if (auto BinOp = dyn_cast<BinaryOperator>(Clause->IgnoreParenImpCasts())) { | |||
3120 | if (BinOp->getOpcode() == BO_LAnd) { | |||
3121 | collectConjunctionTerms(BinOp->getLHS(), Terms); | |||
3122 | collectConjunctionTerms(BinOp->getRHS(), Terms); | |||
3123 | } | |||
3124 | ||||
3125 | return; | |||
3126 | } | |||
3127 | ||||
3128 | Terms.push_back(Clause); | |||
3129 | } | |||
3130 | ||||
3131 | // The ranges-v3 library uses an odd pattern of a top-level "||" with | |||
3132 | // a left-hand side that is value-dependent but never true. Identify | |||
3133 | // the idiom and ignore that term. | |||
3134 | static Expr *lookThroughRangesV3Condition(Preprocessor &PP, Expr *Cond) { | |||
3135 | // Top-level '||'. | |||
3136 | auto *BinOp = dyn_cast<BinaryOperator>(Cond->IgnoreParenImpCasts()); | |||
3137 | if (!BinOp) return Cond; | |||
3138 | ||||
3139 | if (BinOp->getOpcode() != BO_LOr) return Cond; | |||
3140 | ||||
3141 | // With an inner '==' that has a literal on the right-hand side. | |||
3142 | Expr *LHS = BinOp->getLHS(); | |||
3143 | auto *InnerBinOp = dyn_cast<BinaryOperator>(LHS->IgnoreParenImpCasts()); | |||
3144 | if (!InnerBinOp) return Cond; | |||
3145 | ||||
3146 | if (InnerBinOp->getOpcode() != BO_EQ || | |||
3147 | !isa<IntegerLiteral>(InnerBinOp->getRHS())) | |||
3148 | return Cond; | |||
3149 | ||||
3150 | // If the inner binary operation came from a macro expansion named | |||
3151 | // CONCEPT_REQUIRES or CONCEPT_REQUIRES_, return the right-hand side | |||
3152 | // of the '||', which is the real, user-provided condition. | |||
3153 | SourceLocation Loc = InnerBinOp->getExprLoc(); | |||
3154 | if (!Loc.isMacroID()) return Cond; | |||
3155 | ||||
3156 | StringRef MacroName = PP.getImmediateMacroName(Loc); | |||
3157 | if (MacroName == "CONCEPT_REQUIRES" || MacroName == "CONCEPT_REQUIRES_") | |||
3158 | return BinOp->getRHS(); | |||
3159 | ||||
3160 | return Cond; | |||
3161 | } | |||
3162 | ||||
3163 | namespace { | |||
3164 | ||||
3165 | // A PrinterHelper that prints more helpful diagnostics for some sub-expressions | |||
3166 | // within failing boolean expression, such as substituting template parameters | |||
3167 | // for actual types. | |||
3168 | class FailedBooleanConditionPrinterHelper : public PrinterHelper { | |||
3169 | public: | |||
3170 | explicit FailedBooleanConditionPrinterHelper(const PrintingPolicy &P) | |||
3171 | : Policy(P) {} | |||
3172 | ||||
3173 | bool handledStmt(Stmt *E, raw_ostream &OS) override { | |||
3174 | const auto *DR = dyn_cast<DeclRefExpr>(E); | |||
3175 | if (DR && DR->getQualifier()) { | |||
3176 | // If this is a qualified name, expand the template arguments in nested | |||
3177 | // qualifiers. | |||
3178 | DR->getQualifier()->print(OS, Policy, true); | |||
3179 | // Then print the decl itself. | |||
3180 | const ValueDecl *VD = DR->getDecl(); | |||
3181 | OS << VD->getName(); | |||
3182 | if (const auto *IV = dyn_cast<VarTemplateSpecializationDecl>(VD)) { | |||
3183 | // This is a template variable, print the expanded template arguments. | |||
3184 | printTemplateArgumentList(OS, IV->getTemplateArgs().asArray(), Policy); | |||
3185 | } | |||
3186 | return true; | |||
3187 | } | |||
3188 | return false; | |||
3189 | } | |||
3190 | ||||
3191 | private: | |||
3192 | const PrintingPolicy Policy; | |||
3193 | }; | |||
3194 | ||||
3195 | } // end anonymous namespace | |||
3196 | ||||
3197 | std::pair<Expr *, std::string> | |||
3198 | Sema::findFailedBooleanCondition(Expr *Cond) { | |||
3199 | Cond = lookThroughRangesV3Condition(PP, Cond); | |||
3200 | ||||
3201 | // Separate out all of the terms in a conjunction. | |||
3202 | SmallVector<Expr *, 4> Terms; | |||
3203 | collectConjunctionTerms(Cond, Terms); | |||
3204 | ||||
3205 | // Determine which term failed. | |||
3206 | Expr *FailedCond = nullptr; | |||
3207 | for (Expr *Term : Terms) { | |||
3208 | Expr *TermAsWritten = Term->IgnoreParenImpCasts(); | |||
3209 | ||||
3210 | // Literals are uninteresting. | |||
3211 | if (isa<CXXBoolLiteralExpr>(TermAsWritten) || | |||
3212 | isa<IntegerLiteral>(TermAsWritten)) | |||
3213 | continue; | |||
3214 | ||||
3215 | // The initialization of the parameter from the argument is | |||
3216 | // a constant-evaluated context. | |||
3217 | EnterExpressionEvaluationContext ConstantEvaluated( | |||
3218 | *this, Sema::ExpressionEvaluationContext::ConstantEvaluated); | |||
3219 | ||||
3220 | bool Succeeded; | |||
3221 | if (Term->EvaluateAsBooleanCondition(Succeeded, Context) && | |||
3222 | !Succeeded) { | |||
3223 | FailedCond = TermAsWritten; | |||
3224 | break; | |||
3225 | } | |||
3226 | } | |||
3227 | if (!FailedCond) | |||
3228 | FailedCond = Cond->IgnoreParenImpCasts(); | |||
3229 | ||||
3230 | std::string Description; | |||
3231 | { | |||
3232 | llvm::raw_string_ostream Out(Description); | |||
3233 | PrintingPolicy Policy = getPrintingPolicy(); | |||
3234 | Policy.PrintCanonicalTypes = true; | |||
3235 | FailedBooleanConditionPrinterHelper Helper(Policy); | |||
3236 | FailedCond->printPretty(Out, &Helper, Policy, 0, "\n", nullptr); | |||
3237 | } | |||
3238 | return { FailedCond, Description }; | |||
3239 | } | |||
3240 | ||||
3241 | QualType Sema::CheckTemplateIdType(TemplateName Name, | |||
3242 | SourceLocation TemplateLoc, | |||
3243 | TemplateArgumentListInfo &TemplateArgs) { | |||
3244 | DependentTemplateName *DTN | |||
3245 | = Name.getUnderlying().getAsDependentTemplateName(); | |||
3246 | if (DTN && DTN->isIdentifier()) | |||
3247 | // When building a template-id where the template-name is dependent, | |||
3248 | // assume the template is a type template. Either our assumption is | |||
3249 | // correct, or the code is ill-formed and will be diagnosed when the | |||
3250 | // dependent name is substituted. | |||
3251 | return Context.getDependentTemplateSpecializationType(ETK_None, | |||
3252 | DTN->getQualifier(), | |||
3253 | DTN->getIdentifier(), | |||
3254 | TemplateArgs); | |||
3255 | ||||
3256 | TemplateDecl *Template = Name.getAsTemplateDecl(); | |||
3257 | if (!Template || isa<FunctionTemplateDecl>(Template) || | |||
3258 | isa<VarTemplateDecl>(Template) || | |||
3259 | isa<ConceptDecl>(Template)) { | |||
3260 | // We might have a substituted template template parameter pack. If so, | |||
3261 | // build a template specialization type for it. | |||
3262 | if (Name.getAsSubstTemplateTemplateParmPack()) | |||
3263 | return Context.getTemplateSpecializationType(Name, TemplateArgs); | |||
3264 | ||||
3265 | Diag(TemplateLoc, diag::err_template_id_not_a_type) | |||
3266 | << Name; | |||
3267 | NoteAllFoundTemplates(Name); | |||
3268 | return QualType(); | |||
3269 | } | |||
3270 | ||||
3271 | // Check that the template argument list is well-formed for this | |||
3272 | // template. | |||
3273 | SmallVector<TemplateArgument, 4> Converted; | |||
3274 | if (CheckTemplateArgumentList(Template, TemplateLoc, TemplateArgs, | |||
3275 | false, Converted)) | |||
3276 | return QualType(); | |||
3277 | ||||
3278 | QualType CanonType; | |||
3279 | ||||
3280 | bool InstantiationDependent = false; | |||
3281 | if (TypeAliasTemplateDecl *AliasTemplate = | |||
3282 | dyn_cast<TypeAliasTemplateDecl>(Template)) { | |||
3283 | // Find the canonical type for this type alias template specialization. | |||
3284 | TypeAliasDecl *Pattern = AliasTemplate->getTemplatedDecl(); | |||
3285 | if (Pattern->isInvalidDecl()) | |||
3286 | return QualType(); | |||
3287 | ||||
3288 | TemplateArgumentList StackTemplateArgs(TemplateArgumentList::OnStack, | |||
3289 | Converted); | |||
3290 | ||||
3291 | // Only substitute for the innermost template argument list. | |||
3292 | MultiLevelTemplateArgumentList TemplateArgLists; | |||
3293 | TemplateArgLists.addOuterTemplateArguments(&StackTemplateArgs); | |||
3294 | unsigned Depth = AliasTemplate->getTemplateParameters()->getDepth(); | |||
3295 | for (unsigned I = 0; I < Depth; ++I) | |||
3296 | TemplateArgLists.addOuterTemplateArguments(None); | |||
3297 | ||||
3298 | LocalInstantiationScope Scope(*this); | |||
3299 | InstantiatingTemplate Inst(*this, TemplateLoc, Template); | |||
3300 | if (Inst.isInvalid()) | |||
3301 | return QualType(); | |||
3302 | ||||
3303 | CanonType = SubstType(Pattern->getUnderlyingType(), | |||
3304 | TemplateArgLists, AliasTemplate->getLocation(), | |||
3305 | AliasTemplate->getDeclName()); | |||
3306 | if (CanonType.isNull()) { | |||
3307 | // If this was enable_if and we failed to find the nested type | |||
3308 | // within enable_if in a SFINAE context, dig out the specific | |||
3309 | // enable_if condition that failed and present that instead. | |||
3310 | if (isEnableIfAliasTemplate(AliasTemplate)) { | |||
3311 | if (auto DeductionInfo = isSFINAEContext()) { | |||
3312 | if (*DeductionInfo && | |||
3313 | (*DeductionInfo)->hasSFINAEDiagnostic() && | |||
3314 | (*DeductionInfo)->peekSFINAEDiagnostic().second.getDiagID() == | |||
3315 | diag::err_typename_nested_not_found_enable_if && | |||
3316 | TemplateArgs[0].getArgument().getKind() | |||
3317 | == TemplateArgument::Expression) { | |||
3318 | Expr *FailedCond; | |||
3319 | std::string FailedDescription; | |||
3320 | std::tie(FailedCond, FailedDescription) = | |||
3321 | findFailedBooleanCondition(TemplateArgs[0].getSourceExpression()); | |||
3322 | ||||
3323 | // Remove the old SFINAE diagnostic. | |||
3324 | PartialDiagnosticAt OldDiag = | |||
3325 | {SourceLocation(), PartialDiagnostic::NullDiagnostic()}; | |||
3326 | (*DeductionInfo)->takeSFINAEDiagnostic(OldDiag); | |||
3327 | ||||
3328 | // Add a new SFINAE diagnostic specifying which condition | |||
3329 | // failed. | |||
3330 | (*DeductionInfo)->addSFINAEDiagnostic( | |||
3331 | OldDiag.first, | |||
3332 | PDiag(diag::err_typename_nested_not_found_requirement) | |||
3333 | << FailedDescription | |||
3334 | << FailedCond->getSourceRange()); | |||
3335 | } | |||
3336 | } | |||
3337 | } | |||
3338 | ||||
3339 | return QualType(); | |||
3340 | } | |||
3341 | } else if (Name.isDependent() || | |||
3342 | TemplateSpecializationType::anyDependentTemplateArguments( | |||
3343 | TemplateArgs, InstantiationDependent)) { | |||
3344 | // This class template specialization is a dependent | |||
3345 | // type. Therefore, its canonical type is another class template | |||
3346 | // specialization type that contains all of the converted | |||
3347 | // arguments in canonical form. This ensures that, e.g., A<T> and | |||
3348 | // A<T, T> have identical types when A is declared as: | |||
3349 | // | |||
3350 | // template<typename T, typename U = T> struct A; | |||
3351 | CanonType = Context.getCanonicalTemplateSpecializationType(Name, Converted); | |||
3352 | ||||
3353 | // This might work out to be a current instantiation, in which | |||
3354 | // case the canonical type needs to be the InjectedClassNameType. | |||
3355 | // | |||
3356 | // TODO: in theory this could be a simple hashtable lookup; most | |||
3357 | // changes to CurContext don't change the set of current | |||
3358 | // instantiations. | |||
3359 | if (isa<ClassTemplateDecl>(Template)) { | |||
3360 | for (DeclContext *Ctx = CurContext; Ctx; Ctx = Ctx->getLookupParent()) { | |||
3361 | // If we get out to a namespace, we're done. | |||
3362 | if (Ctx->isFileContext()) break; | |||
3363 | ||||
3364 | // If this isn't a record, keep looking. | |||
3365 | CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(Ctx); | |||
3366 | if (!Record) continue; | |||
3367 | ||||
3368 | // Look for one of the two cases with InjectedClassNameTypes | |||
3369 | // and check whether it's the same template. | |||
3370 | if (!isa<ClassTemplatePartialSpecializationDecl>(Record) && | |||
3371 | !Record->getDescribedClassTemplate()) | |||
3372 | continue; | |||
3373 | ||||
3374 | // Fetch the injected class name type and check whether its | |||
3375 | // injected type is equal to the type we just built. | |||
3376 | QualType ICNT = Context.getTypeDeclType(Record); | |||
3377 | QualType Injected = cast<InjectedClassNameType>(ICNT) | |||
3378 | ->getInjectedSpecializationType(); | |||
3379 | ||||
3380 | if (CanonType != Injected->getCanonicalTypeInternal()) | |||
3381 | continue; | |||
3382 | ||||
3383 | // If so, the canonical type of this TST is the injected | |||
3384 | // class name type of the record we just found. | |||
3385 | assert(ICNT.isCanonical())((ICNT.isCanonical()) ? static_cast<void> (0) : __assert_fail ("ICNT.isCanonical()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 3385, __PRETTY_FUNCTION__)); | |||
3386 | CanonType = ICNT; | |||
3387 | break; | |||
3388 | } | |||
3389 | } | |||
3390 | } else if (ClassTemplateDecl *ClassTemplate | |||
3391 | = dyn_cast<ClassTemplateDecl>(Template)) { | |||
3392 | // Find the class template specialization declaration that | |||
3393 | // corresponds to these arguments. | |||
3394 | void *InsertPos = nullptr; | |||
3395 | ClassTemplateSpecializationDecl *Decl | |||
3396 | = ClassTemplate->findSpecialization(Converted, InsertPos); | |||
3397 | if (!Decl) { | |||
3398 | // This is the first time we have referenced this class template | |||
3399 | // specialization. Create the canonical declaration and add it to | |||
3400 | // the set of specializations. | |||
3401 | Decl = ClassTemplateSpecializationDecl::Create( | |||
3402 | Context, ClassTemplate->getTemplatedDecl()->getTagKind(), | |||
3403 | ClassTemplate->getDeclContext(), | |||
3404 | ClassTemplate->getTemplatedDecl()->getBeginLoc(), | |||
3405 | ClassTemplate->getLocation(), ClassTemplate, Converted, nullptr); | |||
3406 | ClassTemplate->AddSpecialization(Decl, InsertPos); | |||
3407 | if (ClassTemplate->isOutOfLine()) | |||
3408 | Decl->setLexicalDeclContext(ClassTemplate->getLexicalDeclContext()); | |||
3409 | } | |||
3410 | ||||
3411 | if (Decl->getSpecializationKind() == TSK_Undeclared) { | |||
3412 | MultiLevelTemplateArgumentList TemplateArgLists; | |||
3413 | TemplateArgLists.addOuterTemplateArguments(Converted); | |||
3414 | InstantiateAttrsForDecl(TemplateArgLists, ClassTemplate->getTemplatedDecl(), | |||
3415 | Decl); | |||
3416 | } | |||
3417 | ||||
3418 | // Diagnose uses of this specialization. | |||
3419 | (void)DiagnoseUseOfDecl(Decl, TemplateLoc); | |||
3420 | ||||
3421 | CanonType = Context.getTypeDeclType(Decl); | |||
3422 | assert(isa<RecordType>(CanonType) &&((isa<RecordType>(CanonType) && "type of non-dependent specialization is not a RecordType" ) ? static_cast<void> (0) : __assert_fail ("isa<RecordType>(CanonType) && \"type of non-dependent specialization is not a RecordType\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 3423, __PRETTY_FUNCTION__)) | |||
3423 | "type of non-dependent specialization is not a RecordType")((isa<RecordType>(CanonType) && "type of non-dependent specialization is not a RecordType" ) ? static_cast<void> (0) : __assert_fail ("isa<RecordType>(CanonType) && \"type of non-dependent specialization is not a RecordType\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 3423, __PRETTY_FUNCTION__)); | |||
3424 | } else if (auto *BTD = dyn_cast<BuiltinTemplateDecl>(Template)) { | |||
3425 | CanonType = checkBuiltinTemplateIdType(*this, BTD, Converted, TemplateLoc, | |||
3426 | TemplateArgs); | |||
3427 | } | |||
3428 | ||||
3429 | // Build the fully-sugared type for this class template | |||
3430 | // specialization, which refers back to the class template | |||
3431 | // specialization we created or found. | |||
3432 | return Context.getTemplateSpecializationType(Name, TemplateArgs, CanonType); | |||
3433 | } | |||
3434 | ||||
3435 | void Sema::ActOnUndeclaredTypeTemplateName(Scope *S, TemplateTy &ParsedName, | |||
3436 | TemplateNameKind &TNK, | |||
3437 | SourceLocation NameLoc, | |||
3438 | IdentifierInfo *&II) { | |||
3439 | assert(TNK == TNK_Undeclared_template && "not an undeclared template name")((TNK == TNK_Undeclared_template && "not an undeclared template name" ) ? static_cast<void> (0) : __assert_fail ("TNK == TNK_Undeclared_template && \"not an undeclared template name\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 3439, __PRETTY_FUNCTION__)); | |||
3440 | ||||
3441 | TemplateName Name = ParsedName.get(); | |||
3442 | auto *ATN = Name.getAsAssumedTemplateName(); | |||
3443 | assert(ATN && "not an assumed template name")((ATN && "not an assumed template name") ? static_cast <void> (0) : __assert_fail ("ATN && \"not an assumed template name\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 3443, __PRETTY_FUNCTION__)); | |||
3444 | II = ATN->getDeclName().getAsIdentifierInfo(); | |||
3445 | ||||
3446 | if (!resolveAssumedTemplateNameAsType(S, Name, NameLoc, /*Diagnose*/false)) { | |||
3447 | // Resolved to a type template name. | |||
3448 | ParsedName = TemplateTy::make(Name); | |||
3449 | TNK = TNK_Type_template; | |||
3450 | } | |||
3451 | } | |||
3452 | ||||
3453 | bool Sema::resolveAssumedTemplateNameAsType(Scope *S, TemplateName &Name, | |||
3454 | SourceLocation NameLoc, | |||
3455 | bool Diagnose) { | |||
3456 | // We assumed this undeclared identifier to be an (ADL-only) function | |||
3457 | // template name, but it was used in a context where a type was required. | |||
3458 | // Try to typo-correct it now. | |||
3459 | AssumedTemplateStorage *ATN = Name.getAsAssumedTemplateName(); | |||
3460 | assert(ATN && "not an assumed template name")((ATN && "not an assumed template name") ? static_cast <void> (0) : __assert_fail ("ATN && \"not an assumed template name\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 3460, __PRETTY_FUNCTION__)); | |||
3461 | ||||
3462 | LookupResult R(*this, ATN->getDeclName(), NameLoc, LookupOrdinaryName); | |||
3463 | struct CandidateCallback : CorrectionCandidateCallback { | |||
3464 | bool ValidateCandidate(const TypoCorrection &TC) override { | |||
3465 | return TC.getCorrectionDecl() && | |||
3466 | getAsTypeTemplateDecl(TC.getCorrectionDecl()); | |||
3467 | } | |||
3468 | std::unique_ptr<CorrectionCandidateCallback> clone() override { | |||
3469 | return std::make_unique<CandidateCallback>(*this); | |||
3470 | } | |||
3471 | } FilterCCC; | |||
3472 | ||||
3473 | TypoCorrection Corrected = | |||
3474 | CorrectTypo(R.getLookupNameInfo(), R.getLookupKind(), S, nullptr, | |||
3475 | FilterCCC, CTK_ErrorRecovery); | |||
3476 | if (Corrected && Corrected.getFoundDecl()) { | |||
3477 | diagnoseTypo(Corrected, PDiag(diag::err_no_template_suggest) | |||
3478 | << ATN->getDeclName()); | |||
3479 | Name = TemplateName(Corrected.getCorrectionDeclAs<TemplateDecl>()); | |||
3480 | return false; | |||
3481 | } | |||
3482 | ||||
3483 | if (Diagnose) | |||
3484 | Diag(R.getNameLoc(), diag::err_no_template) << R.getLookupName(); | |||
3485 | return true; | |||
3486 | } | |||
3487 | ||||
3488 | TypeResult Sema::ActOnTemplateIdType( | |||
3489 | Scope *S, CXXScopeSpec &SS, SourceLocation TemplateKWLoc, | |||
3490 | TemplateTy TemplateD, IdentifierInfo *TemplateII, | |||
3491 | SourceLocation TemplateIILoc, SourceLocation LAngleLoc, | |||
3492 | ASTTemplateArgsPtr TemplateArgsIn, SourceLocation RAngleLoc, | |||
3493 | bool IsCtorOrDtorName, bool IsClassName) { | |||
3494 | if (SS.isInvalid()) | |||
3495 | return true; | |||
3496 | ||||
3497 | if (!IsCtorOrDtorName && !IsClassName && SS.isSet()) { | |||
3498 | DeclContext *LookupCtx = computeDeclContext(SS, /*EnteringContext*/false); | |||
3499 | ||||
3500 | // C++ [temp.res]p3: | |||
3501 | // A qualified-id that refers to a type and in which the | |||
3502 | // nested-name-specifier depends on a template-parameter (14.6.2) | |||
3503 | // shall be prefixed by the keyword typename to indicate that the | |||
3504 | // qualified-id denotes a type, forming an | |||
3505 | // elaborated-type-specifier (7.1.5.3). | |||
3506 | if (!LookupCtx && isDependentScopeSpecifier(SS)) { | |||
3507 | Diag(SS.getBeginLoc(), diag::err_typename_missing_template) | |||
3508 | << SS.getScopeRep() << TemplateII->getName(); | |||
3509 | // Recover as if 'typename' were specified. | |||
3510 | // FIXME: This is not quite correct recovery as we don't transform SS | |||
3511 | // into the corresponding dependent form (and we don't diagnose missing | |||
3512 | // 'template' keywords within SS as a result). | |||
3513 | return ActOnTypenameType(nullptr, SourceLocation(), SS, TemplateKWLoc, | |||
3514 | TemplateD, TemplateII, TemplateIILoc, LAngleLoc, | |||
3515 | TemplateArgsIn, RAngleLoc); | |||
3516 | } | |||
3517 | ||||
3518 | // Per C++ [class.qual]p2, if the template-id was an injected-class-name, | |||
3519 | // it's not actually allowed to be used as a type in most cases. Because | |||
3520 | // we annotate it before we know whether it's valid, we have to check for | |||
3521 | // this case here. | |||
3522 | auto *LookupRD = dyn_cast_or_null<CXXRecordDecl>(LookupCtx); | |||
3523 | if (LookupRD && LookupRD->getIdentifier() == TemplateII) { | |||
3524 | Diag(TemplateIILoc, | |||
3525 | TemplateKWLoc.isInvalid() | |||
3526 | ? diag::err_out_of_line_qualified_id_type_names_constructor | |||
3527 | : diag::ext_out_of_line_qualified_id_type_names_constructor) | |||
3528 | << TemplateII << 0 /*injected-class-name used as template name*/ | |||
3529 | << 1 /*if any keyword was present, it was 'template'*/; | |||
3530 | } | |||
3531 | } | |||
3532 | ||||
3533 | TemplateName Template = TemplateD.get(); | |||
3534 | if (Template.getAsAssumedTemplateName() && | |||
3535 | resolveAssumedTemplateNameAsType(S, Template, TemplateIILoc)) | |||
3536 | return true; | |||
3537 | ||||
3538 | // Translate the parser's template argument list in our AST format. | |||
3539 | TemplateArgumentListInfo TemplateArgs(LAngleLoc, RAngleLoc); | |||
3540 | translateTemplateArguments(TemplateArgsIn, TemplateArgs); | |||
3541 | ||||
3542 | if (DependentTemplateName *DTN = Template.getAsDependentTemplateName()) { | |||
3543 | QualType T | |||
3544 | = Context.getDependentTemplateSpecializationType(ETK_None, | |||
3545 | DTN->getQualifier(), | |||
3546 | DTN->getIdentifier(), | |||
3547 | TemplateArgs); | |||
3548 | // Build type-source information. | |||
3549 | TypeLocBuilder TLB; | |||
3550 | DependentTemplateSpecializationTypeLoc SpecTL | |||
3551 | = TLB.push<DependentTemplateSpecializationTypeLoc>(T); | |||
3552 | SpecTL.setElaboratedKeywordLoc(SourceLocation()); | |||
3553 | SpecTL.setQualifierLoc(SS.getWithLocInContext(Context)); | |||
3554 | SpecTL.setTemplateKeywordLoc(TemplateKWLoc); | |||
3555 | SpecTL.setTemplateNameLoc(TemplateIILoc); | |||
3556 | SpecTL.setLAngleLoc(LAngleLoc); | |||
3557 | SpecTL.setRAngleLoc(RAngleLoc); | |||
3558 | for (unsigned I = 0, N = SpecTL.getNumArgs(); I != N; ++I) | |||
3559 | SpecTL.setArgLocInfo(I, TemplateArgs[I].getLocInfo()); | |||
3560 | return CreateParsedType(T, TLB.getTypeSourceInfo(Context, T)); | |||
3561 | } | |||
3562 | ||||
3563 | QualType Result = CheckTemplateIdType(Template, TemplateIILoc, TemplateArgs); | |||
3564 | if (Result.isNull()) | |||
3565 | return true; | |||
3566 | ||||
3567 | // Build type-source information. | |||
3568 | TypeLocBuilder TLB; | |||
3569 | TemplateSpecializationTypeLoc SpecTL | |||
3570 | = TLB.push<TemplateSpecializationTypeLoc>(Result); | |||
3571 | SpecTL.setTemplateKeywordLoc(TemplateKWLoc); | |||
3572 | SpecTL.setTemplateNameLoc(TemplateIILoc); | |||
3573 | SpecTL.setLAngleLoc(LAngleLoc); | |||
3574 | SpecTL.setRAngleLoc(RAngleLoc); | |||
3575 | for (unsigned i = 0, e = SpecTL.getNumArgs(); i != e; ++i) | |||
3576 | SpecTL.setArgLocInfo(i, TemplateArgs[i].getLocInfo()); | |||
3577 | ||||
3578 | // NOTE: avoid constructing an ElaboratedTypeLoc if this is a | |||
3579 | // constructor or destructor name (in such a case, the scope specifier | |||
3580 | // will be attached to the enclosing Decl or Expr node). | |||
3581 | if (SS.isNotEmpty() && !IsCtorOrDtorName) { | |||
3582 | // Create an elaborated-type-specifier containing the nested-name-specifier. | |||
3583 | Result = Context.getElaboratedType(ETK_None, SS.getScopeRep(), Result); | |||
3584 | ElaboratedTypeLoc ElabTL = TLB.push<ElaboratedTypeLoc>(Result); | |||
3585 | ElabTL.setElaboratedKeywordLoc(SourceLocation()); | |||
3586 | ElabTL.setQualifierLoc(SS.getWithLocInContext(Context)); | |||
3587 | } | |||
3588 | ||||
3589 | return CreateParsedType(Result, TLB.getTypeSourceInfo(Context, Result)); | |||
3590 | } | |||
3591 | ||||
3592 | TypeResult Sema::ActOnTagTemplateIdType(TagUseKind TUK, | |||
3593 | TypeSpecifierType TagSpec, | |||
3594 | SourceLocation TagLoc, | |||
3595 | CXXScopeSpec &SS, | |||
3596 | SourceLocation TemplateKWLoc, | |||
3597 | TemplateTy TemplateD, | |||
3598 | SourceLocation TemplateLoc, | |||
3599 | SourceLocation LAngleLoc, | |||
3600 | ASTTemplateArgsPtr TemplateArgsIn, | |||
3601 | SourceLocation RAngleLoc) { | |||
3602 | TemplateName Template = TemplateD.get(); | |||
3603 | ||||
3604 | // Translate the parser's template argument list in our AST format. | |||
3605 | TemplateArgumentListInfo TemplateArgs(LAngleLoc, RAngleLoc); | |||
3606 | translateTemplateArguments(TemplateArgsIn, TemplateArgs); | |||
3607 | ||||
3608 | // Determine the tag kind | |||
3609 | TagTypeKind TagKind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec); | |||
3610 | ElaboratedTypeKeyword Keyword | |||
3611 | = TypeWithKeyword::getKeywordForTagTypeKind(TagKind); | |||
3612 | ||||
3613 | if (DependentTemplateName *DTN = Template.getAsDependentTemplateName()) { | |||
3614 | QualType T = Context.getDependentTemplateSpecializationType(Keyword, | |||
3615 | DTN->getQualifier(), | |||
3616 | DTN->getIdentifier(), | |||
3617 | TemplateArgs); | |||
3618 | ||||
3619 | // Build type-source information. | |||
3620 | TypeLocBuilder TLB; | |||
3621 | DependentTemplateSpecializationTypeLoc SpecTL | |||
3622 | = TLB.push<DependentTemplateSpecializationTypeLoc>(T); | |||
3623 | SpecTL.setElaboratedKeywordLoc(TagLoc); | |||
3624 | SpecTL.setQualifierLoc(SS.getWithLocInContext(Context)); | |||
3625 | SpecTL.setTemplateKeywordLoc(TemplateKWLoc); | |||
3626 | SpecTL.setTemplateNameLoc(TemplateLoc); | |||
3627 | SpecTL.setLAngleLoc(LAngleLoc); | |||
3628 | SpecTL.setRAngleLoc(RAngleLoc); | |||
3629 | for (unsigned I = 0, N = SpecTL.getNumArgs(); I != N; ++I) | |||
3630 | SpecTL.setArgLocInfo(I, TemplateArgs[I].getLocInfo()); | |||
3631 | return CreateParsedType(T, TLB.getTypeSourceInfo(Context, T)); | |||
3632 | } | |||
3633 | ||||
3634 | if (TypeAliasTemplateDecl *TAT = | |||
3635 | dyn_cast_or_null<TypeAliasTemplateDecl>(Template.getAsTemplateDecl())) { | |||
3636 | // C++0x [dcl.type.elab]p2: | |||
3637 | // If the identifier resolves to a typedef-name or the simple-template-id | |||
3638 | // resolves to an alias template specialization, the | |||
3639 | // elaborated-type-specifier is ill-formed. | |||
3640 | Diag(TemplateLoc, diag::err_tag_reference_non_tag) | |||
3641 | << TAT << NTK_TypeAliasTemplate << TagKind; | |||
3642 | Diag(TAT->getLocation(), diag::note_declared_at); | |||
3643 | } | |||
3644 | ||||
3645 | QualType Result = CheckTemplateIdType(Template, TemplateLoc, TemplateArgs); | |||
3646 | if (Result.isNull()) | |||
3647 | return TypeResult(true); | |||
3648 | ||||
3649 | // Check the tag kind | |||
3650 | if (const RecordType *RT = Result->getAs<RecordType>()) { | |||
3651 | RecordDecl *D = RT->getDecl(); | |||
3652 | ||||
3653 | IdentifierInfo *Id = D->getIdentifier(); | |||
3654 | assert(Id && "templated class must have an identifier")((Id && "templated class must have an identifier") ? static_cast <void> (0) : __assert_fail ("Id && \"templated class must have an identifier\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 3654, __PRETTY_FUNCTION__)); | |||
3655 | ||||
3656 | if (!isAcceptableTagRedeclaration(D, TagKind, TUK == TUK_Definition, | |||
3657 | TagLoc, Id)) { | |||
3658 | Diag(TagLoc, diag::err_use_with_wrong_tag) | |||
3659 | << Result | |||
3660 | << FixItHint::CreateReplacement(SourceRange(TagLoc), D->getKindName()); | |||
3661 | Diag(D->getLocation(), diag::note_previous_use); | |||
3662 | } | |||
3663 | } | |||
3664 | ||||
3665 | // Provide source-location information for the template specialization. | |||
3666 | TypeLocBuilder TLB; | |||
3667 | TemplateSpecializationTypeLoc SpecTL | |||
3668 | = TLB.push<TemplateSpecializationTypeLoc>(Result); | |||
3669 | SpecTL.setTemplateKeywordLoc(TemplateKWLoc); | |||
3670 | SpecTL.setTemplateNameLoc(TemplateLoc); | |||
3671 | SpecTL.setLAngleLoc(LAngleLoc); | |||
3672 | SpecTL.setRAngleLoc(RAngleLoc); | |||
3673 | for (unsigned i = 0, e = SpecTL.getNumArgs(); i != e; ++i) | |||
3674 | SpecTL.setArgLocInfo(i, TemplateArgs[i].getLocInfo()); | |||
3675 | ||||
3676 | // Construct an elaborated type containing the nested-name-specifier (if any) | |||
3677 | // and tag keyword. | |||
3678 | Result = Context.getElaboratedType(Keyword, SS.getScopeRep(), Result); | |||
3679 | ElaboratedTypeLoc ElabTL = TLB.push<ElaboratedTypeLoc>(Result); | |||
3680 | ElabTL.setElaboratedKeywordLoc(TagLoc); | |||
3681 | ElabTL.setQualifierLoc(SS.getWithLocInContext(Context)); | |||
3682 | return CreateParsedType(Result, TLB.getTypeSourceInfo(Context, Result)); | |||
3683 | } | |||
3684 | ||||
3685 | static bool CheckTemplateSpecializationScope(Sema &S, NamedDecl *Specialized, | |||
3686 | NamedDecl *PrevDecl, | |||
3687 | SourceLocation Loc, | |||
3688 | bool IsPartialSpecialization); | |||
3689 | ||||
3690 | static TemplateSpecializationKind getTemplateSpecializationKind(Decl *D); | |||
3691 | ||||
3692 | static bool isTemplateArgumentTemplateParameter( | |||
3693 | const TemplateArgument &Arg, unsigned Depth, unsigned Index) { | |||
3694 | switch (Arg.getKind()) { | |||
3695 | case TemplateArgument::Null: | |||
3696 | case TemplateArgument::NullPtr: | |||
3697 | case TemplateArgument::Integral: | |||
3698 | case TemplateArgument::Declaration: | |||
3699 | case TemplateArgument::Pack: | |||
3700 | case TemplateArgument::TemplateExpansion: | |||
3701 | return false; | |||
3702 | ||||
3703 | case TemplateArgument::Type: { | |||
3704 | QualType Type = Arg.getAsType(); | |||
3705 | const TemplateTypeParmType *TPT = | |||
3706 | Arg.getAsType()->getAs<TemplateTypeParmType>(); | |||
3707 | return TPT && !Type.hasQualifiers() && | |||
3708 | TPT->getDepth() == Depth && TPT->getIndex() == Index; | |||
3709 | } | |||
3710 | ||||
3711 | case TemplateArgument::Expression: { | |||
3712 | DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Arg.getAsExpr()); | |||
3713 | if (!DRE || !DRE->getDecl()) | |||
3714 | return false; | |||
3715 | const NonTypeTemplateParmDecl *NTTP = | |||
3716 | dyn_cast<NonTypeTemplateParmDecl>(DRE->getDecl()); | |||
3717 | return NTTP && NTTP->getDepth() == Depth && NTTP->getIndex() == Index; | |||
3718 | } | |||
3719 | ||||
3720 | case TemplateArgument::Template: | |||
3721 | const TemplateTemplateParmDecl *TTP = | |||
3722 | dyn_cast_or_null<TemplateTemplateParmDecl>( | |||
3723 | Arg.getAsTemplateOrTemplatePattern().getAsTemplateDecl()); | |||
3724 | return TTP && TTP->getDepth() == Depth && TTP->getIndex() == Index; | |||
3725 | } | |||
3726 | llvm_unreachable("unexpected kind of template argument")::llvm::llvm_unreachable_internal("unexpected kind of template argument" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 3726); | |||
3727 | } | |||
3728 | ||||
3729 | static bool isSameAsPrimaryTemplate(TemplateParameterList *Params, | |||
3730 | ArrayRef<TemplateArgument> Args) { | |||
3731 | if (Params->size() != Args.size()) | |||
3732 | return false; | |||
3733 | ||||
3734 | unsigned Depth = Params->getDepth(); | |||
3735 | ||||
3736 | for (unsigned I = 0, N = Args.size(); I != N; ++I) { | |||
3737 | TemplateArgument Arg = Args[I]; | |||
3738 | ||||
3739 | // If the parameter is a pack expansion, the argument must be a pack | |||
3740 | // whose only element is a pack expansion. | |||
3741 | if (Params->getParam(I)->isParameterPack()) { | |||
3742 | if (Arg.getKind() != TemplateArgument::Pack || Arg.pack_size() != 1 || | |||
3743 | !Arg.pack_begin()->isPackExpansion()) | |||
3744 | return false; | |||
3745 | Arg = Arg.pack_begin()->getPackExpansionPattern(); | |||
3746 | } | |||
3747 | ||||
3748 | if (!isTemplateArgumentTemplateParameter(Arg, Depth, I)) | |||
3749 | return false; | |||
3750 | } | |||
3751 | ||||
3752 | return true; | |||
3753 | } | |||
3754 | ||||
3755 | /// Convert the parser's template argument list representation into our form. | |||
3756 | static TemplateArgumentListInfo | |||
3757 | makeTemplateArgumentListInfo(Sema &S, TemplateIdAnnotation &TemplateId) { | |||
3758 | TemplateArgumentListInfo TemplateArgs(TemplateId.LAngleLoc, | |||
3759 | TemplateId.RAngleLoc); | |||
3760 | ASTTemplateArgsPtr TemplateArgsPtr(TemplateId.getTemplateArgs(), | |||
3761 | TemplateId.NumArgs); | |||
3762 | S.translateTemplateArguments(TemplateArgsPtr, TemplateArgs); | |||
3763 | return TemplateArgs; | |||
3764 | } | |||
3765 | ||||
3766 | template<typename PartialSpecDecl> | |||
3767 | static void checkMoreSpecializedThanPrimary(Sema &S, PartialSpecDecl *Partial) { | |||
3768 | if (Partial->getDeclContext()->isDependentContext()) | |||
3769 | return; | |||
3770 | ||||
3771 | // FIXME: Get the TDK from deduction in order to provide better diagnostics | |||
3772 | // for non-substitution-failure issues? | |||
3773 | TemplateDeductionInfo Info(Partial->getLocation()); | |||
3774 | if (S.isMoreSpecializedThanPrimary(Partial, Info)) | |||
3775 | return; | |||
3776 | ||||
3777 | auto *Template = Partial->getSpecializedTemplate(); | |||
3778 | S.Diag(Partial->getLocation(), | |||
3779 | diag::ext_partial_spec_not_more_specialized_than_primary) | |||
3780 | << isa<VarTemplateDecl>(Template); | |||
3781 | ||||
3782 | if (Info.hasSFINAEDiagnostic()) { | |||
3783 | PartialDiagnosticAt Diag = {SourceLocation(), | |||
3784 | PartialDiagnostic::NullDiagnostic()}; | |||
3785 | Info.takeSFINAEDiagnostic(Diag); | |||
3786 | SmallString<128> SFINAEArgString; | |||
3787 | Diag.second.EmitToString(S.getDiagnostics(), SFINAEArgString); | |||
3788 | S.Diag(Diag.first, | |||
3789 | diag::note_partial_spec_not_more_specialized_than_primary) | |||
3790 | << SFINAEArgString; | |||
3791 | } | |||
3792 | ||||
3793 | S.Diag(Template->getLocation(), diag::note_template_decl_here); | |||
3794 | } | |||
3795 | ||||
3796 | static void | |||
3797 | noteNonDeducibleParameters(Sema &S, TemplateParameterList *TemplateParams, | |||
3798 | const llvm::SmallBitVector &DeducibleParams) { | |||
3799 | for (unsigned I = 0, N = DeducibleParams.size(); I != N; ++I) { | |||
3800 | if (!DeducibleParams[I]) { | |||
3801 | NamedDecl *Param = TemplateParams->getParam(I); | |||
3802 | if (Param->getDeclName()) | |||
3803 | S.Diag(Param->getLocation(), diag::note_non_deducible_parameter) | |||
3804 | << Param->getDeclName(); | |||
3805 | else | |||
3806 | S.Diag(Param->getLocation(), diag::note_non_deducible_parameter) | |||
3807 | << "(anonymous)"; | |||
3808 | } | |||
3809 | } | |||
3810 | } | |||
3811 | ||||
3812 | ||||
3813 | template<typename PartialSpecDecl> | |||
3814 | static void checkTemplatePartialSpecialization(Sema &S, | |||
3815 | PartialSpecDecl *Partial) { | |||
3816 | // C++1z [temp.class.spec]p8: (DR1495) | |||
3817 | // - The specialization shall be more specialized than the primary | |||
3818 | // template (14.5.5.2). | |||
3819 | checkMoreSpecializedThanPrimary(S, Partial); | |||
3820 | ||||
3821 | // C++ [temp.class.spec]p8: (DR1315) | |||
3822 | // - Each template-parameter shall appear at least once in the | |||
3823 | // template-id outside a non-deduced context. | |||
3824 | // C++1z [temp.class.spec.match]p3 (P0127R2) | |||
3825 | // If the template arguments of a partial specialization cannot be | |||
3826 | // deduced because of the structure of its template-parameter-list | |||
3827 | // and the template-id, the program is ill-formed. | |||
3828 | auto *TemplateParams = Partial->getTemplateParameters(); | |||
3829 | llvm::SmallBitVector DeducibleParams(TemplateParams->size()); | |||
3830 | S.MarkUsedTemplateParameters(Partial->getTemplateArgs(), true, | |||
3831 | TemplateParams->getDepth(), DeducibleParams); | |||
3832 | ||||
3833 | if (!DeducibleParams.all()) { | |||
3834 | unsigned NumNonDeducible = DeducibleParams.size() - DeducibleParams.count(); | |||
3835 | S.Diag(Partial->getLocation(), diag::ext_partial_specs_not_deducible) | |||
3836 | << isa<VarTemplatePartialSpecializationDecl>(Partial) | |||
3837 | << (NumNonDeducible > 1) | |||
3838 | << SourceRange(Partial->getLocation(), | |||
3839 | Partial->getTemplateArgsAsWritten()->RAngleLoc); | |||
3840 | noteNonDeducibleParameters(S, TemplateParams, DeducibleParams); | |||
3841 | } | |||
3842 | } | |||
3843 | ||||
3844 | void Sema::CheckTemplatePartialSpecialization( | |||
3845 | ClassTemplatePartialSpecializationDecl *Partial) { | |||
3846 | checkTemplatePartialSpecialization(*this, Partial); | |||
3847 | } | |||
3848 | ||||
3849 | void Sema::CheckTemplatePartialSpecialization( | |||
3850 | VarTemplatePartialSpecializationDecl *Partial) { | |||
3851 | checkTemplatePartialSpecialization(*this, Partial); | |||
3852 | } | |||
3853 | ||||
3854 | void Sema::CheckDeductionGuideTemplate(FunctionTemplateDecl *TD) { | |||
3855 | // C++1z [temp.param]p11: | |||
3856 | // A template parameter of a deduction guide template that does not have a | |||
3857 | // default-argument shall be deducible from the parameter-type-list of the | |||
3858 | // deduction guide template. | |||
3859 | auto *TemplateParams = TD->getTemplateParameters(); | |||
3860 | llvm::SmallBitVector DeducibleParams(TemplateParams->size()); | |||
3861 | MarkDeducedTemplateParameters(TD, DeducibleParams); | |||
3862 | for (unsigned I = 0; I != TemplateParams->size(); ++I) { | |||
3863 | // A parameter pack is deducible (to an empty pack). | |||
3864 | auto *Param = TemplateParams->getParam(I); | |||
3865 | if (Param->isParameterPack() || hasVisibleDefaultArgument(Param)) | |||
3866 | DeducibleParams[I] = true; | |||
3867 | } | |||
3868 | ||||
3869 | if (!DeducibleParams.all()) { | |||
3870 | unsigned NumNonDeducible = DeducibleParams.size() - DeducibleParams.count(); | |||
3871 | Diag(TD->getLocation(), diag::err_deduction_guide_template_not_deducible) | |||
3872 | << (NumNonDeducible > 1); | |||
3873 | noteNonDeducibleParameters(*this, TemplateParams, DeducibleParams); | |||
3874 | } | |||
3875 | } | |||
3876 | ||||
3877 | DeclResult Sema::ActOnVarTemplateSpecialization( | |||
3878 | Scope *S, Declarator &D, TypeSourceInfo *DI, SourceLocation TemplateKWLoc, | |||
3879 | TemplateParameterList *TemplateParams, StorageClass SC, | |||
3880 | bool IsPartialSpecialization) { | |||
3881 | // D must be variable template id. | |||
3882 | assert(D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId &&((D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId && "Variable template specialization is declared with a template it." ) ? static_cast<void> (0) : __assert_fail ("D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId && \"Variable template specialization is declared with a template it.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 3883, __PRETTY_FUNCTION__)) | |||
3883 | "Variable template specialization is declared with a template it.")((D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId && "Variable template specialization is declared with a template it." ) ? static_cast<void> (0) : __assert_fail ("D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId && \"Variable template specialization is declared with a template it.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 3883, __PRETTY_FUNCTION__)); | |||
3884 | ||||
3885 | TemplateIdAnnotation *TemplateId = D.getName().TemplateId; | |||
3886 | TemplateArgumentListInfo TemplateArgs = | |||
3887 | makeTemplateArgumentListInfo(*this, *TemplateId); | |||
3888 | SourceLocation TemplateNameLoc = D.getIdentifierLoc(); | |||
3889 | SourceLocation LAngleLoc = TemplateId->LAngleLoc; | |||
3890 | SourceLocation RAngleLoc = TemplateId->RAngleLoc; | |||
3891 | ||||
3892 | TemplateName Name = TemplateId->Template.get(); | |||
3893 | ||||
3894 | // The template-id must name a variable template. | |||
3895 | VarTemplateDecl *VarTemplate = | |||
3896 | dyn_cast_or_null<VarTemplateDecl>(Name.getAsTemplateDecl()); | |||
3897 | if (!VarTemplate) { | |||
3898 | NamedDecl *FnTemplate; | |||
3899 | if (auto *OTS = Name.getAsOverloadedTemplate()) | |||
3900 | FnTemplate = *OTS->begin(); | |||
3901 | else | |||
3902 | FnTemplate = dyn_cast_or_null<FunctionTemplateDecl>(Name.getAsTemplateDecl()); | |||
3903 | if (FnTemplate) | |||
3904 | return Diag(D.getIdentifierLoc(), diag::err_var_spec_no_template_but_method) | |||
3905 | << FnTemplate->getDeclName(); | |||
3906 | return Diag(D.getIdentifierLoc(), diag::err_var_spec_no_template) | |||
3907 | << IsPartialSpecialization; | |||
3908 | } | |||
3909 | ||||
3910 | // Check for unexpanded parameter packs in any of the template arguments. | |||
3911 | for (unsigned I = 0, N = TemplateArgs.size(); I != N; ++I) | |||
3912 | if (DiagnoseUnexpandedParameterPack(TemplateArgs[I], | |||
3913 | UPPC_PartialSpecialization)) | |||
3914 | return true; | |||
3915 | ||||
3916 | // Check that the template argument list is well-formed for this | |||
3917 | // template. | |||
3918 | SmallVector<TemplateArgument, 4> Converted; | |||
3919 | if (CheckTemplateArgumentList(VarTemplate, TemplateNameLoc, TemplateArgs, | |||
3920 | false, Converted)) | |||
3921 | return true; | |||
3922 | ||||
3923 | // Find the variable template (partial) specialization declaration that | |||
3924 | // corresponds to these arguments. | |||
3925 | if (IsPartialSpecialization) { | |||
3926 | if (CheckTemplatePartialSpecializationArgs(TemplateNameLoc, VarTemplate, | |||
3927 | TemplateArgs.size(), Converted)) | |||
3928 | return true; | |||
3929 | ||||
3930 | // FIXME: Move these checks to CheckTemplatePartialSpecializationArgs so we | |||
3931 | // also do them during instantiation. | |||
3932 | bool InstantiationDependent; | |||
3933 | if (!Name.isDependent() && | |||
3934 | !TemplateSpecializationType::anyDependentTemplateArguments( | |||
3935 | TemplateArgs.arguments(), | |||
3936 | InstantiationDependent)) { | |||
3937 | Diag(TemplateNameLoc, diag::err_partial_spec_fully_specialized) | |||
3938 | << VarTemplate->getDeclName(); | |||
3939 | IsPartialSpecialization = false; | |||
3940 | } | |||
3941 | ||||
3942 | if (isSameAsPrimaryTemplate(VarTemplate->getTemplateParameters(), | |||
3943 | Converted)) { | |||
3944 | // C++ [temp.class.spec]p9b3: | |||
3945 | // | |||
3946 | // -- The argument list of the specialization shall not be identical | |||
3947 | // to the implicit argument list of the primary template. | |||
3948 | Diag(TemplateNameLoc, diag::err_partial_spec_args_match_primary_template) | |||
3949 | << /*variable template*/ 1 | |||
3950 | << /*is definition*/(SC != SC_Extern && !CurContext->isRecord()) | |||
3951 | << FixItHint::CreateRemoval(SourceRange(LAngleLoc, RAngleLoc)); | |||
3952 | // FIXME: Recover from this by treating the declaration as a redeclaration | |||
3953 | // of the primary template. | |||
3954 | return true; | |||
3955 | } | |||
3956 | } | |||
3957 | ||||
3958 | void *InsertPos = nullptr; | |||
3959 | VarTemplateSpecializationDecl *PrevDecl = nullptr; | |||
3960 | ||||
3961 | if (IsPartialSpecialization) | |||
3962 | // FIXME: Template parameter list matters too | |||
3963 | PrevDecl = VarTemplate->findPartialSpecialization(Converted, InsertPos); | |||
3964 | else | |||
3965 | PrevDecl = VarTemplate->findSpecialization(Converted, InsertPos); | |||
3966 | ||||
3967 | VarTemplateSpecializationDecl *Specialization = nullptr; | |||
3968 | ||||
3969 | // Check whether we can declare a variable template specialization in | |||
3970 | // the current scope. | |||
3971 | if (CheckTemplateSpecializationScope(*this, VarTemplate, PrevDecl, | |||
3972 | TemplateNameLoc, | |||
3973 | IsPartialSpecialization)) | |||
3974 | return true; | |||
3975 | ||||
3976 | if (PrevDecl && PrevDecl->getSpecializationKind() == TSK_Undeclared) { | |||
3977 | // Since the only prior variable template specialization with these | |||
3978 | // arguments was referenced but not declared, reuse that | |||
3979 | // declaration node as our own, updating its source location and | |||
3980 | // the list of outer template parameters to reflect our new declaration. | |||
3981 | Specialization = PrevDecl; | |||
3982 | Specialization->setLocation(TemplateNameLoc); | |||
3983 | PrevDecl = nullptr; | |||
3984 | } else if (IsPartialSpecialization) { | |||
3985 | // Create a new class template partial specialization declaration node. | |||
3986 | VarTemplatePartialSpecializationDecl *PrevPartial = | |||
3987 | cast_or_null<VarTemplatePartialSpecializationDecl>(PrevDecl); | |||
3988 | VarTemplatePartialSpecializationDecl *Partial = | |||
3989 | VarTemplatePartialSpecializationDecl::Create( | |||
3990 | Context, VarTemplate->getDeclContext(), TemplateKWLoc, | |||
3991 | TemplateNameLoc, TemplateParams, VarTemplate, DI->getType(), DI, SC, | |||
3992 | Converted, TemplateArgs); | |||
3993 | ||||
3994 | if (!PrevPartial) | |||
3995 | VarTemplate->AddPartialSpecialization(Partial, InsertPos); | |||
3996 | Specialization = Partial; | |||
3997 | ||||
3998 | // If we are providing an explicit specialization of a member variable | |||
3999 | // template specialization, make a note of that. | |||
4000 | if (PrevPartial && PrevPartial->getInstantiatedFromMember()) | |||
4001 | PrevPartial->setMemberSpecialization(); | |||
4002 | ||||
4003 | CheckTemplatePartialSpecialization(Partial); | |||
4004 | } else { | |||
4005 | // Create a new class template specialization declaration node for | |||
4006 | // this explicit specialization or friend declaration. | |||
4007 | Specialization = VarTemplateSpecializationDecl::Create( | |||
4008 | Context, VarTemplate->getDeclContext(), TemplateKWLoc, TemplateNameLoc, | |||
4009 | VarTemplate, DI->getType(), DI, SC, Converted); | |||
4010 | Specialization->setTemplateArgsInfo(TemplateArgs); | |||
4011 | ||||
4012 | if (!PrevDecl) | |||
4013 | VarTemplate->AddSpecialization(Specialization, InsertPos); | |||
4014 | } | |||
4015 | ||||
4016 | // C++ [temp.expl.spec]p6: | |||
4017 | // If a template, a member template or the member of a class template is | |||
4018 | // explicitly specialized then that specialization shall be declared | |||
4019 | // before the first use of that specialization that would cause an implicit | |||
4020 | // instantiation to take place, in every translation unit in which such a | |||
4021 | // use occurs; no diagnostic is required. | |||
4022 | if (PrevDecl && PrevDecl->getPointOfInstantiation().isValid()) { | |||
4023 | bool Okay = false; | |||
4024 | for (Decl *Prev = PrevDecl; Prev; Prev = Prev->getPreviousDecl()) { | |||
4025 | // Is there any previous explicit specialization declaration? | |||
4026 | if (getTemplateSpecializationKind(Prev) == TSK_ExplicitSpecialization) { | |||
4027 | Okay = true; | |||
4028 | break; | |||
4029 | } | |||
4030 | } | |||
4031 | ||||
4032 | if (!Okay) { | |||
4033 | SourceRange Range(TemplateNameLoc, RAngleLoc); | |||
4034 | Diag(TemplateNameLoc, diag::err_specialization_after_instantiation) | |||
4035 | << Name << Range; | |||
4036 | ||||
4037 | Diag(PrevDecl->getPointOfInstantiation(), | |||
4038 | diag::note_instantiation_required_here) | |||
4039 | << (PrevDecl->getTemplateSpecializationKind() != | |||
4040 | TSK_ImplicitInstantiation); | |||
4041 | return true; | |||
4042 | } | |||
4043 | } | |||
4044 | ||||
4045 | Specialization->setTemplateKeywordLoc(TemplateKWLoc); | |||
4046 | Specialization->setLexicalDeclContext(CurContext); | |||
4047 | ||||
4048 | // Add the specialization into its lexical context, so that it can | |||
4049 | // be seen when iterating through the list of declarations in that | |||
4050 | // context. However, specializations are not found by name lookup. | |||
4051 | CurContext->addDecl(Specialization); | |||
4052 | ||||
4053 | // Note that this is an explicit specialization. | |||
4054 | Specialization->setSpecializationKind(TSK_ExplicitSpecialization); | |||
4055 | ||||
4056 | if (PrevDecl) { | |||
4057 | // Check that this isn't a redefinition of this specialization, | |||
4058 | // merging with previous declarations. | |||
4059 | LookupResult PrevSpec(*this, GetNameForDeclarator(D), LookupOrdinaryName, | |||
4060 | forRedeclarationInCurContext()); | |||
4061 | PrevSpec.addDecl(PrevDecl); | |||
4062 | D.setRedeclaration(CheckVariableDeclaration(Specialization, PrevSpec)); | |||
4063 | } else if (Specialization->isStaticDataMember() && | |||
4064 | Specialization->isOutOfLine()) { | |||
4065 | Specialization->setAccess(VarTemplate->getAccess()); | |||
4066 | } | |||
4067 | ||||
4068 | return Specialization; | |||
4069 | } | |||
4070 | ||||
4071 | namespace { | |||
4072 | /// A partial specialization whose template arguments have matched | |||
4073 | /// a given template-id. | |||
4074 | struct PartialSpecMatchResult { | |||
4075 | VarTemplatePartialSpecializationDecl *Partial; | |||
4076 | TemplateArgumentList *Args; | |||
4077 | }; | |||
4078 | } // end anonymous namespace | |||
4079 | ||||
4080 | DeclResult | |||
4081 | Sema::CheckVarTemplateId(VarTemplateDecl *Template, SourceLocation TemplateLoc, | |||
4082 | SourceLocation TemplateNameLoc, | |||
4083 | const TemplateArgumentListInfo &TemplateArgs) { | |||
4084 | assert(Template && "A variable template id without template?")((Template && "A variable template id without template?" ) ? static_cast<void> (0) : __assert_fail ("Template && \"A variable template id without template?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 4084, __PRETTY_FUNCTION__)); | |||
4085 | ||||
4086 | // Check that the template argument list is well-formed for this template. | |||
4087 | SmallVector<TemplateArgument, 4> Converted; | |||
4088 | if (CheckTemplateArgumentList( | |||
4089 | Template, TemplateNameLoc, | |||
4090 | const_cast<TemplateArgumentListInfo &>(TemplateArgs), false, | |||
4091 | Converted)) | |||
4092 | return true; | |||
4093 | ||||
4094 | // Find the variable template specialization declaration that | |||
4095 | // corresponds to these arguments. | |||
4096 | void *InsertPos = nullptr; | |||
4097 | if (VarTemplateSpecializationDecl *Spec = Template->findSpecialization( | |||
4098 | Converted, InsertPos)) { | |||
4099 | checkSpecializationVisibility(TemplateNameLoc, Spec); | |||
4100 | // If we already have a variable template specialization, return it. | |||
4101 | return Spec; | |||
4102 | } | |||
4103 | ||||
4104 | // This is the first time we have referenced this variable template | |||
4105 | // specialization. Create the canonical declaration and add it to | |||
4106 | // the set of specializations, based on the closest partial specialization | |||
4107 | // that it represents. That is, | |||
4108 | VarDecl *InstantiationPattern = Template->getTemplatedDecl(); | |||
4109 | TemplateArgumentList TemplateArgList(TemplateArgumentList::OnStack, | |||
4110 | Converted); | |||
4111 | TemplateArgumentList *InstantiationArgs = &TemplateArgList; | |||
4112 | bool AmbiguousPartialSpec = false; | |||
4113 | typedef PartialSpecMatchResult MatchResult; | |||
4114 | SmallVector<MatchResult, 4> Matched; | |||
4115 | SourceLocation PointOfInstantiation = TemplateNameLoc; | |||
4116 | TemplateSpecCandidateSet FailedCandidates(PointOfInstantiation, | |||
4117 | /*ForTakingAddress=*/false); | |||
4118 | ||||
4119 | // 1. Attempt to find the closest partial specialization that this | |||
4120 | // specializes, if any. | |||
4121 | // If any of the template arguments is dependent, then this is probably | |||
4122 | // a placeholder for an incomplete declarative context; which must be | |||
4123 | // complete by instantiation time. Thus, do not search through the partial | |||
4124 | // specializations yet. | |||
4125 | // TODO: Unify with InstantiateClassTemplateSpecialization()? | |||
4126 | // Perhaps better after unification of DeduceTemplateArguments() and | |||
4127 | // getMoreSpecializedPartialSpecialization(). | |||
4128 | bool InstantiationDependent = false; | |||
4129 | if (!TemplateSpecializationType::anyDependentTemplateArguments( | |||
4130 | TemplateArgs, InstantiationDependent)) { | |||
4131 | ||||
4132 | SmallVector<VarTemplatePartialSpecializationDecl *, 4> PartialSpecs; | |||
4133 | Template->getPartialSpecializations(PartialSpecs); | |||
4134 | ||||
4135 | for (unsigned I = 0, N = PartialSpecs.size(); I != N; ++I) { | |||
4136 | VarTemplatePartialSpecializationDecl *Partial = PartialSpecs[I]; | |||
4137 | TemplateDeductionInfo Info(FailedCandidates.getLocation()); | |||
4138 | ||||
4139 | if (TemplateDeductionResult Result = | |||
4140 | DeduceTemplateArguments(Partial, TemplateArgList, Info)) { | |||
4141 | // Store the failed-deduction information for use in diagnostics, later. | |||
4142 | // TODO: Actually use the failed-deduction info? | |||
4143 | FailedCandidates.addCandidate().set( | |||
4144 | DeclAccessPair::make(Template, AS_public), Partial, | |||
4145 | MakeDeductionFailureInfo(Context, Result, Info)); | |||
4146 | (void)Result; | |||
4147 | } else { | |||
4148 | Matched.push_back(PartialSpecMatchResult()); | |||
4149 | Matched.back().Partial = Partial; | |||
4150 | Matched.back().Args = Info.take(); | |||
4151 | } | |||
4152 | } | |||
4153 | ||||
4154 | if (Matched.size() >= 1) { | |||
4155 | SmallVector<MatchResult, 4>::iterator Best = Matched.begin(); | |||
4156 | if (Matched.size() == 1) { | |||
4157 | // -- If exactly one matching specialization is found, the | |||
4158 | // instantiation is generated from that specialization. | |||
4159 | // We don't need to do anything for this. | |||
4160 | } else { | |||
4161 | // -- If more than one matching specialization is found, the | |||
4162 | // partial order rules (14.5.4.2) are used to determine | |||
4163 | // whether one of the specializations is more specialized | |||
4164 | // than the others. If none of the specializations is more | |||
4165 | // specialized than all of the other matching | |||
4166 | // specializations, then the use of the variable template is | |||
4167 | // ambiguous and the program is ill-formed. | |||
4168 | for (SmallVector<MatchResult, 4>::iterator P = Best + 1, | |||
4169 | PEnd = Matched.end(); | |||
4170 | P != PEnd; ++P) { | |||
4171 | if (getMoreSpecializedPartialSpecialization(P->Partial, Best->Partial, | |||
4172 | PointOfInstantiation) == | |||
4173 | P->Partial) | |||
4174 | Best = P; | |||
4175 | } | |||
4176 | ||||
4177 | // Determine if the best partial specialization is more specialized than | |||
4178 | // the others. | |||
4179 | for (SmallVector<MatchResult, 4>::iterator P = Matched.begin(), | |||
4180 | PEnd = Matched.end(); | |||
4181 | P != PEnd; ++P) { | |||
4182 | if (P != Best && getMoreSpecializedPartialSpecialization( | |||
4183 | P->Partial, Best->Partial, | |||
4184 | PointOfInstantiation) != Best->Partial) { | |||
4185 | AmbiguousPartialSpec = true; | |||
4186 | break; | |||
4187 | } | |||
4188 | } | |||
4189 | } | |||
4190 | ||||
4191 | // Instantiate using the best variable template partial specialization. | |||
4192 | InstantiationPattern = Best->Partial; | |||
4193 | InstantiationArgs = Best->Args; | |||
4194 | } else { | |||
4195 | // -- If no match is found, the instantiation is generated | |||
4196 | // from the primary template. | |||
4197 | // InstantiationPattern = Template->getTemplatedDecl(); | |||
4198 | } | |||
4199 | } | |||
4200 | ||||
4201 | // 2. Create the canonical declaration. | |||
4202 | // Note that we do not instantiate a definition until we see an odr-use | |||
4203 | // in DoMarkVarDeclReferenced(). | |||
4204 | // FIXME: LateAttrs et al.? | |||
4205 | VarTemplateSpecializationDecl *Decl = BuildVarTemplateInstantiation( | |||
4206 | Template, InstantiationPattern, *InstantiationArgs, TemplateArgs, | |||
4207 | Converted, TemplateNameLoc, InsertPos /*, LateAttrs, StartingScope*/); | |||
4208 | if (!Decl) | |||
4209 | return true; | |||
4210 | ||||
4211 | if (AmbiguousPartialSpec) { | |||
4212 | // Partial ordering did not produce a clear winner. Complain. | |||
4213 | Decl->setInvalidDecl(); | |||
4214 | Diag(PointOfInstantiation, diag::err_partial_spec_ordering_ambiguous) | |||
4215 | << Decl; | |||
4216 | ||||
4217 | // Print the matching partial specializations. | |||
4218 | for (MatchResult P : Matched) | |||
4219 | Diag(P.Partial->getLocation(), diag::note_partial_spec_match) | |||
4220 | << getTemplateArgumentBindingsText(P.Partial->getTemplateParameters(), | |||
4221 | *P.Args); | |||
4222 | return true; | |||
4223 | } | |||
4224 | ||||
4225 | if (VarTemplatePartialSpecializationDecl *D = | |||
4226 | dyn_cast<VarTemplatePartialSpecializationDecl>(InstantiationPattern)) | |||
4227 | Decl->setInstantiationOf(D, InstantiationArgs); | |||
4228 | ||||
4229 | checkSpecializationVisibility(TemplateNameLoc, Decl); | |||
4230 | ||||
4231 | assert(Decl && "No variable template specialization?")((Decl && "No variable template specialization?") ? static_cast <void> (0) : __assert_fail ("Decl && \"No variable template specialization?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 4231, __PRETTY_FUNCTION__)); | |||
4232 | return Decl; | |||
4233 | } | |||
4234 | ||||
4235 | ExprResult | |||
4236 | Sema::CheckVarTemplateId(const CXXScopeSpec &SS, | |||
4237 | const DeclarationNameInfo &NameInfo, | |||
4238 | VarTemplateDecl *Template, SourceLocation TemplateLoc, | |||
4239 | const TemplateArgumentListInfo *TemplateArgs) { | |||
4240 | ||||
4241 | DeclResult Decl = CheckVarTemplateId(Template, TemplateLoc, NameInfo.getLoc(), | |||
4242 | *TemplateArgs); | |||
4243 | if (Decl.isInvalid()) | |||
4244 | return ExprError(); | |||
4245 | ||||
4246 | VarDecl *Var = cast<VarDecl>(Decl.get()); | |||
4247 | if (!Var->getTemplateSpecializationKind()) | |||
4248 | Var->setTemplateSpecializationKind(TSK_ImplicitInstantiation, | |||
4249 | NameInfo.getLoc()); | |||
4250 | ||||
4251 | // Build an ordinary singleton decl ref. | |||
4252 | return BuildDeclarationNameExpr(SS, NameInfo, Var, | |||
4253 | /*FoundD=*/nullptr, TemplateArgs); | |||
4254 | } | |||
4255 | ||||
4256 | void Sema::diagnoseMissingTemplateArguments(TemplateName Name, | |||
4257 | SourceLocation Loc) { | |||
4258 | Diag(Loc, diag::err_template_missing_args) | |||
4259 | << (int)getTemplateNameKindForDiagnostics(Name) << Name; | |||
4260 | if (TemplateDecl *TD = Name.getAsTemplateDecl()) { | |||
4261 | Diag(TD->getLocation(), diag::note_template_decl_here) | |||
4262 | << TD->getTemplateParameters()->getSourceRange(); | |||
4263 | } | |||
4264 | } | |||
4265 | ||||
4266 | ExprResult | |||
4267 | Sema::CheckConceptTemplateId(const CXXScopeSpec &SS, | |||
4268 | const DeclarationNameInfo &NameInfo, | |||
4269 | ConceptDecl *Template, | |||
4270 | SourceLocation TemplateLoc, | |||
4271 | const TemplateArgumentListInfo *TemplateArgs) { | |||
4272 | // TODO: Do concept specialization here. | |||
4273 | Diag(NameInfo.getBeginLoc(), diag::err_concept_not_implemented) << | |||
4274 | "concept specialization"; | |||
4275 | return ExprError(); | |||
4276 | } | |||
4277 | ||||
4278 | ExprResult Sema::BuildTemplateIdExpr(const CXXScopeSpec &SS, | |||
4279 | SourceLocation TemplateKWLoc, | |||
4280 | LookupResult &R, | |||
4281 | bool RequiresADL, | |||
4282 | const TemplateArgumentListInfo *TemplateArgs) { | |||
4283 | // FIXME: Can we do any checking at this point? I guess we could check the | |||
4284 | // template arguments that we have against the template name, if the template | |||
4285 | // name refers to a single template. That's not a terribly common case, | |||
4286 | // though. | |||
4287 | // foo<int> could identify a single function unambiguously | |||
4288 | // This approach does NOT work, since f<int>(1); | |||
4289 | // gets resolved prior to resorting to overload resolution | |||
4290 | // i.e., template<class T> void f(double); | |||
4291 | // vs template<class T, class U> void f(U); | |||
4292 | ||||
4293 | // These should be filtered out by our callers. | |||
4294 | assert(!R.isAmbiguous() && "ambiguous lookup when building templateid")((!R.isAmbiguous() && "ambiguous lookup when building templateid" ) ? static_cast<void> (0) : __assert_fail ("!R.isAmbiguous() && \"ambiguous lookup when building templateid\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 4294, __PRETTY_FUNCTION__)); | |||
4295 | ||||
4296 | // Non-function templates require a template argument list. | |||
4297 | if (auto *TD = R.getAsSingle<TemplateDecl>()) { | |||
4298 | if (!TemplateArgs && !isa<FunctionTemplateDecl>(TD)) { | |||
4299 | diagnoseMissingTemplateArguments(TemplateName(TD), R.getNameLoc()); | |||
4300 | return ExprError(); | |||
4301 | } | |||
4302 | } | |||
4303 | ||||
4304 | auto AnyDependentArguments = [&]() -> bool { | |||
4305 | bool InstantiationDependent; | |||
4306 | return TemplateArgs && | |||
4307 | TemplateSpecializationType::anyDependentTemplateArguments( | |||
4308 | *TemplateArgs, InstantiationDependent); | |||
4309 | }; | |||
4310 | ||||
4311 | // In C++1y, check variable template ids. | |||
4312 | if (R.getAsSingle<VarTemplateDecl>() && !AnyDependentArguments()) { | |||
4313 | return CheckVarTemplateId(SS, R.getLookupNameInfo(), | |||
4314 | R.getAsSingle<VarTemplateDecl>(), | |||
4315 | TemplateKWLoc, TemplateArgs); | |||
4316 | } | |||
4317 | ||||
4318 | if (R.getAsSingle<ConceptDecl>() && !AnyDependentArguments()) { | |||
4319 | return CheckConceptTemplateId(SS, R.getLookupNameInfo(), | |||
4320 | R.getAsSingle<ConceptDecl>(), | |||
4321 | TemplateKWLoc, TemplateArgs); | |||
4322 | } | |||
4323 | ||||
4324 | // We don't want lookup warnings at this point. | |||
4325 | R.suppressDiagnostics(); | |||
4326 | ||||
4327 | UnresolvedLookupExpr *ULE | |||
4328 | = UnresolvedLookupExpr::Create(Context, R.getNamingClass(), | |||
4329 | SS.getWithLocInContext(Context), | |||
4330 | TemplateKWLoc, | |||
4331 | R.getLookupNameInfo(), | |||
4332 | RequiresADL, TemplateArgs, | |||
4333 | R.begin(), R.end()); | |||
4334 | ||||
4335 | return ULE; | |||
4336 | } | |||
4337 | ||||
4338 | // We actually only call this from template instantiation. | |||
4339 | ExprResult | |||
4340 | Sema::BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, | |||
4341 | SourceLocation TemplateKWLoc, | |||
4342 | const DeclarationNameInfo &NameInfo, | |||
4343 | const TemplateArgumentListInfo *TemplateArgs) { | |||
4344 | ||||
4345 | assert(TemplateArgs || TemplateKWLoc.isValid())((TemplateArgs || TemplateKWLoc.isValid()) ? static_cast<void > (0) : __assert_fail ("TemplateArgs || TemplateKWLoc.isValid()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 4345, __PRETTY_FUNCTION__)); | |||
4346 | DeclContext *DC; | |||
4347 | if (!(DC = computeDeclContext(SS, false)) || | |||
4348 | DC->isDependentContext() || | |||
4349 | RequireCompleteDeclContext(SS, DC)) | |||
4350 | return BuildDependentDeclRefExpr(SS, TemplateKWLoc, NameInfo, TemplateArgs); | |||
4351 | ||||
4352 | bool MemberOfUnknownSpecialization; | |||
4353 | LookupResult R(*this, NameInfo, LookupOrdinaryName); | |||
4354 | if (LookupTemplateName(R, (Scope *)nullptr, SS, QualType(), | |||
4355 | /*Entering*/false, MemberOfUnknownSpecialization, | |||
4356 | TemplateKWLoc)) | |||
4357 | return ExprError(); | |||
4358 | ||||
4359 | if (R.isAmbiguous()) | |||
4360 | return ExprError(); | |||
4361 | ||||
4362 | if (R.empty()) { | |||
4363 | Diag(NameInfo.getLoc(), diag::err_no_member) | |||
4364 | << NameInfo.getName() << DC << SS.getRange(); | |||
4365 | return ExprError(); | |||
4366 | } | |||
4367 | ||||
4368 | if (ClassTemplateDecl *Temp = R.getAsSingle<ClassTemplateDecl>()) { | |||
4369 | Diag(NameInfo.getLoc(), diag::err_template_kw_refers_to_class_template) | |||
4370 | << SS.getScopeRep() | |||
4371 | << NameInfo.getName().getAsString() << SS.getRange(); | |||
4372 | Diag(Temp->getLocation(), diag::note_referenced_class_template); | |||
4373 | return ExprError(); | |||
4374 | } | |||
4375 | ||||
4376 | return BuildTemplateIdExpr(SS, TemplateKWLoc, R, /*ADL*/ false, TemplateArgs); | |||
4377 | } | |||
4378 | ||||
4379 | /// Form a dependent template name. | |||
4380 | /// | |||
4381 | /// This action forms a dependent template name given the template | |||
4382 | /// name and its (presumably dependent) scope specifier. For | |||
4383 | /// example, given "MetaFun::template apply", the scope specifier \p | |||
4384 | /// SS will be "MetaFun::", \p TemplateKWLoc contains the location | |||
4385 | /// of the "template" keyword, and "apply" is the \p Name. | |||
4386 | TemplateNameKind Sema::ActOnDependentTemplateName(Scope *S, | |||
4387 | CXXScopeSpec &SS, | |||
4388 | SourceLocation TemplateKWLoc, | |||
4389 | const UnqualifiedId &Name, | |||
4390 | ParsedType ObjectType, | |||
4391 | bool EnteringContext, | |||
4392 | TemplateTy &Result, | |||
4393 | bool AllowInjectedClassName) { | |||
4394 | if (TemplateKWLoc.isValid() && S && !S->getTemplateParamParent()) | |||
4395 | Diag(TemplateKWLoc, | |||
4396 | getLangOpts().CPlusPlus11 ? | |||
4397 | diag::warn_cxx98_compat_template_outside_of_template : | |||
4398 | diag::ext_template_outside_of_template) | |||
4399 | << FixItHint::CreateRemoval(TemplateKWLoc); | |||
4400 | ||||
4401 | DeclContext *LookupCtx = nullptr; | |||
4402 | if (SS.isSet()) | |||
4403 | LookupCtx = computeDeclContext(SS, EnteringContext); | |||
4404 | if (!LookupCtx && ObjectType) | |||
4405 | LookupCtx = computeDeclContext(ObjectType.get()); | |||
4406 | if (LookupCtx) { | |||
4407 | // C++0x [temp.names]p5: | |||
4408 | // If a name prefixed by the keyword template is not the name of | |||
4409 | // a template, the program is ill-formed. [Note: the keyword | |||
4410 | // template may not be applied to non-template members of class | |||
4411 | // templates. -end note ] [ Note: as is the case with the | |||
4412 | // typename prefix, the template prefix is allowed in cases | |||
4413 | // where it is not strictly necessary; i.e., when the | |||
4414 | // nested-name-specifier or the expression on the left of the -> | |||
4415 | // or . is not dependent on a template-parameter, or the use | |||
4416 | // does not appear in the scope of a template. -end note] | |||
4417 | // | |||
4418 | // Note: C++03 was more strict here, because it banned the use of | |||
4419 | // the "template" keyword prior to a template-name that was not a | |||
4420 | // dependent name. C++ DR468 relaxed this requirement (the | |||
4421 | // "template" keyword is now permitted). We follow the C++0x | |||
4422 | // rules, even in C++03 mode with a warning, retroactively applying the DR. | |||
4423 | bool MemberOfUnknownSpecialization; | |||
4424 | TemplateNameKind TNK = isTemplateName(S, SS, TemplateKWLoc.isValid(), Name, | |||
4425 | ObjectType, EnteringContext, Result, | |||
4426 | MemberOfUnknownSpecialization); | |||
4427 | if (TNK == TNK_Non_template && MemberOfUnknownSpecialization) { | |||
4428 | // This is a dependent template. Handle it below. | |||
4429 | } else if (TNK == TNK_Non_template) { | |||
4430 | // Do the lookup again to determine if this is a "nothing found" case or | |||
4431 | // a "not a template" case. FIXME: Refactor isTemplateName so we don't | |||
4432 | // need to do this. | |||
4433 | DeclarationNameInfo DNI = GetNameFromUnqualifiedId(Name); | |||
4434 | LookupResult R(*this, DNI.getName(), Name.getBeginLoc(), | |||
4435 | LookupOrdinaryName); | |||
4436 | bool MOUS; | |||
4437 | if (!LookupTemplateName(R, S, SS, ObjectType.get(), EnteringContext, | |||
4438 | MOUS, TemplateKWLoc) && !R.isAmbiguous()) | |||
4439 | Diag(Name.getBeginLoc(), diag::err_no_member) | |||
4440 | << DNI.getName() << LookupCtx << SS.getRange(); | |||
4441 | return TNK_Non_template; | |||
4442 | } else { | |||
4443 | // We found something; return it. | |||
4444 | auto *LookupRD = dyn_cast<CXXRecordDecl>(LookupCtx); | |||
4445 | if (!AllowInjectedClassName && SS.isSet() && LookupRD && | |||
4446 | Name.getKind() == UnqualifiedIdKind::IK_Identifier && | |||
4447 | Name.Identifier && LookupRD->getIdentifier() == Name.Identifier) { | |||
4448 | // C++14 [class.qual]p2: | |||
4449 | // In a lookup in which function names are not ignored and the | |||
4450 | // nested-name-specifier nominates a class C, if the name specified | |||
4451 | // [...] is the injected-class-name of C, [...] the name is instead | |||
4452 | // considered to name the constructor | |||
4453 | // | |||
4454 | // We don't get here if naming the constructor would be valid, so we | |||
4455 | // just reject immediately and recover by treating the | |||
4456 | // injected-class-name as naming the template. | |||
4457 | Diag(Name.getBeginLoc(), | |||
4458 | diag::ext_out_of_line_qualified_id_type_names_constructor) | |||
4459 | << Name.Identifier | |||
4460 | << 0 /*injected-class-name used as template name*/ | |||
4461 | << 1 /*'template' keyword was used*/; | |||
4462 | } | |||
4463 | return TNK; | |||
4464 | } | |||
4465 | } | |||
4466 | ||||
4467 | NestedNameSpecifier *Qualifier = SS.getScopeRep(); | |||
4468 | ||||
4469 | switch (Name.getKind()) { | |||
4470 | case UnqualifiedIdKind::IK_Identifier: | |||
4471 | Result = TemplateTy::make(Context.getDependentTemplateName(Qualifier, | |||
4472 | Name.Identifier)); | |||
4473 | return TNK_Dependent_template_name; | |||
4474 | ||||
4475 | case UnqualifiedIdKind::IK_OperatorFunctionId: | |||
4476 | Result = TemplateTy::make(Context.getDependentTemplateName(Qualifier, | |||
4477 | Name.OperatorFunctionId.Operator)); | |||
4478 | return TNK_Function_template; | |||
4479 | ||||
4480 | case UnqualifiedIdKind::IK_LiteralOperatorId: | |||
4481 | llvm_unreachable("literal operator id cannot have a dependent scope")::llvm::llvm_unreachable_internal("literal operator id cannot have a dependent scope" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 4481); | |||
4482 | ||||
4483 | default: | |||
4484 | break; | |||
4485 | } | |||
4486 | ||||
4487 | Diag(Name.getBeginLoc(), diag::err_template_kw_refers_to_non_template) | |||
4488 | << GetNameFromUnqualifiedId(Name).getName() << Name.getSourceRange() | |||
4489 | << TemplateKWLoc; | |||
4490 | return TNK_Non_template; | |||
4491 | } | |||
4492 | ||||
4493 | bool Sema::CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, | |||
4494 | TemplateArgumentLoc &AL, | |||
4495 | SmallVectorImpl<TemplateArgument> &Converted) { | |||
4496 | const TemplateArgument &Arg = AL.getArgument(); | |||
4497 | QualType ArgType; | |||
4498 | TypeSourceInfo *TSI = nullptr; | |||
4499 | ||||
4500 | // Check template type parameter. | |||
4501 | switch(Arg.getKind()) { | |||
4502 | case TemplateArgument::Type: | |||
4503 | // C++ [temp.arg.type]p1: | |||
4504 | // A template-argument for a template-parameter which is a | |||
4505 | // type shall be a type-id. | |||
4506 | ArgType = Arg.getAsType(); | |||
4507 | TSI = AL.getTypeSourceInfo(); | |||
4508 | break; | |||
4509 | case TemplateArgument::Template: | |||
4510 | case TemplateArgument::TemplateExpansion: { | |||
4511 | // We have a template type parameter but the template argument | |||
4512 | // is a template without any arguments. | |||
4513 | SourceRange SR = AL.getSourceRange(); | |||
4514 | TemplateName Name = Arg.getAsTemplateOrTemplatePattern(); | |||
4515 | diagnoseMissingTemplateArguments(Name, SR.getEnd()); | |||
4516 | return true; | |||
4517 | } | |||
4518 | case TemplateArgument::Expression: { | |||
4519 | // We have a template type parameter but the template argument is an | |||
4520 | // expression; see if maybe it is missing the "typename" keyword. | |||
4521 | CXXScopeSpec SS; | |||
4522 | DeclarationNameInfo NameInfo; | |||
4523 | ||||
4524 | if (DeclRefExpr *ArgExpr = dyn_cast<DeclRefExpr>(Arg.getAsExpr())) { | |||
4525 | SS.Adopt(ArgExpr->getQualifierLoc()); | |||
4526 | NameInfo = ArgExpr->getNameInfo(); | |||
4527 | } else if (DependentScopeDeclRefExpr *ArgExpr = | |||
4528 | dyn_cast<DependentScopeDeclRefExpr>(Arg.getAsExpr())) { | |||
4529 | SS.Adopt(ArgExpr->getQualifierLoc()); | |||
4530 | NameInfo = ArgExpr->getNameInfo(); | |||
4531 | } else if (CXXDependentScopeMemberExpr *ArgExpr = | |||
4532 | dyn_cast<CXXDependentScopeMemberExpr>(Arg.getAsExpr())) { | |||
4533 | if (ArgExpr->isImplicitAccess()) { | |||
4534 | SS.Adopt(ArgExpr->getQualifierLoc()); | |||
4535 | NameInfo = ArgExpr->getMemberNameInfo(); | |||
4536 | } | |||
4537 | } | |||
4538 | ||||
4539 | if (auto *II = NameInfo.getName().getAsIdentifierInfo()) { | |||
4540 | LookupResult Result(*this, NameInfo, LookupOrdinaryName); | |||
4541 | LookupParsedName(Result, CurScope, &SS); | |||
4542 | ||||
4543 | if (Result.getAsSingle<TypeDecl>() || | |||
4544 | Result.getResultKind() == | |||
4545 | LookupResult::NotFoundInCurrentInstantiation) { | |||
4546 | // Suggest that the user add 'typename' before the NNS. | |||
4547 | SourceLocation Loc = AL.getSourceRange().getBegin(); | |||
4548 | Diag(Loc, getLangOpts().MSVCCompat | |||
4549 | ? diag::ext_ms_template_type_arg_missing_typename | |||
4550 | : diag::err_template_arg_must_be_type_suggest) | |||
4551 | << FixItHint::CreateInsertion(Loc, "typename "); | |||
4552 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
4553 | ||||
4554 | // Recover by synthesizing a type using the location information that we | |||
4555 | // already have. | |||
4556 | ArgType = | |||
4557 | Context.getDependentNameType(ETK_Typename, SS.getScopeRep(), II); | |||
4558 | TypeLocBuilder TLB; | |||
4559 | DependentNameTypeLoc TL = TLB.push<DependentNameTypeLoc>(ArgType); | |||
4560 | TL.setElaboratedKeywordLoc(SourceLocation(/*synthesized*/)); | |||
4561 | TL.setQualifierLoc(SS.getWithLocInContext(Context)); | |||
4562 | TL.setNameLoc(NameInfo.getLoc()); | |||
4563 | TSI = TLB.getTypeSourceInfo(Context, ArgType); | |||
4564 | ||||
4565 | // Overwrite our input TemplateArgumentLoc so that we can recover | |||
4566 | // properly. | |||
4567 | AL = TemplateArgumentLoc(TemplateArgument(ArgType), | |||
4568 | TemplateArgumentLocInfo(TSI)); | |||
4569 | ||||
4570 | break; | |||
4571 | } | |||
4572 | } | |||
4573 | // fallthrough | |||
4574 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
4575 | } | |||
4576 | default: { | |||
4577 | // We have a template type parameter but the template argument | |||
4578 | // is not a type. | |||
4579 | SourceRange SR = AL.getSourceRange(); | |||
4580 | Diag(SR.getBegin(), diag::err_template_arg_must_be_type) << SR; | |||
4581 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
4582 | ||||
4583 | return true; | |||
4584 | } | |||
4585 | } | |||
4586 | ||||
4587 | if (CheckTemplateArgument(Param, TSI)) | |||
4588 | return true; | |||
4589 | ||||
4590 | // Add the converted template type argument. | |||
4591 | ArgType = Context.getCanonicalType(ArgType); | |||
4592 | ||||
4593 | // Objective-C ARC: | |||
4594 | // If an explicitly-specified template argument type is a lifetime type | |||
4595 | // with no lifetime qualifier, the __strong lifetime qualifier is inferred. | |||
4596 | if (getLangOpts().ObjCAutoRefCount && | |||
4597 | ArgType->isObjCLifetimeType() && | |||
4598 | !ArgType.getObjCLifetime()) { | |||
4599 | Qualifiers Qs; | |||
4600 | Qs.setObjCLifetime(Qualifiers::OCL_Strong); | |||
4601 | ArgType = Context.getQualifiedType(ArgType, Qs); | |||
4602 | } | |||
4603 | ||||
4604 | Converted.push_back(TemplateArgument(ArgType)); | |||
4605 | return false; | |||
4606 | } | |||
4607 | ||||
4608 | /// Substitute template arguments into the default template argument for | |||
4609 | /// the given template type parameter. | |||
4610 | /// | |||
4611 | /// \param SemaRef the semantic analysis object for which we are performing | |||
4612 | /// the substitution. | |||
4613 | /// | |||
4614 | /// \param Template the template that we are synthesizing template arguments | |||
4615 | /// for. | |||
4616 | /// | |||
4617 | /// \param TemplateLoc the location of the template name that started the | |||
4618 | /// template-id we are checking. | |||
4619 | /// | |||
4620 | /// \param RAngleLoc the location of the right angle bracket ('>') that | |||
4621 | /// terminates the template-id. | |||
4622 | /// | |||
4623 | /// \param Param the template template parameter whose default we are | |||
4624 | /// substituting into. | |||
4625 | /// | |||
4626 | /// \param Converted the list of template arguments provided for template | |||
4627 | /// parameters that precede \p Param in the template parameter list. | |||
4628 | /// \returns the substituted template argument, or NULL if an error occurred. | |||
4629 | static TypeSourceInfo * | |||
4630 | SubstDefaultTemplateArgument(Sema &SemaRef, | |||
4631 | TemplateDecl *Template, | |||
4632 | SourceLocation TemplateLoc, | |||
4633 | SourceLocation RAngleLoc, | |||
4634 | TemplateTypeParmDecl *Param, | |||
4635 | SmallVectorImpl<TemplateArgument> &Converted) { | |||
4636 | TypeSourceInfo *ArgType = Param->getDefaultArgumentInfo(); | |||
4637 | ||||
4638 | // If the argument type is dependent, instantiate it now based | |||
4639 | // on the previously-computed template arguments. | |||
4640 | if (ArgType->getType()->isInstantiationDependentType()) { | |||
4641 | Sema::InstantiatingTemplate Inst(SemaRef, TemplateLoc, | |||
4642 | Param, Template, Converted, | |||
4643 | SourceRange(TemplateLoc, RAngleLoc)); | |||
4644 | if (Inst.isInvalid()) | |||
4645 | return nullptr; | |||
4646 | ||||
4647 | TemplateArgumentList TemplateArgs(TemplateArgumentList::OnStack, Converted); | |||
4648 | ||||
4649 | // Only substitute for the innermost template argument list. | |||
4650 | MultiLevelTemplateArgumentList TemplateArgLists; | |||
4651 | TemplateArgLists.addOuterTemplateArguments(&TemplateArgs); | |||
4652 | for (unsigned i = 0, e = Param->getDepth(); i != e; ++i) | |||
4653 | TemplateArgLists.addOuterTemplateArguments(None); | |||
4654 | ||||
4655 | Sema::ContextRAII SavedContext(SemaRef, Template->getDeclContext()); | |||
4656 | ArgType = | |||
4657 | SemaRef.SubstType(ArgType, TemplateArgLists, | |||
4658 | Param->getDefaultArgumentLoc(), Param->getDeclName()); | |||
4659 | } | |||
4660 | ||||
4661 | return ArgType; | |||
4662 | } | |||
4663 | ||||
4664 | /// Substitute template arguments into the default template argument for | |||
4665 | /// the given non-type template parameter. | |||
4666 | /// | |||
4667 | /// \param SemaRef the semantic analysis object for which we are performing | |||
4668 | /// the substitution. | |||
4669 | /// | |||
4670 | /// \param Template the template that we are synthesizing template arguments | |||
4671 | /// for. | |||
4672 | /// | |||
4673 | /// \param TemplateLoc the location of the template name that started the | |||
4674 | /// template-id we are checking. | |||
4675 | /// | |||
4676 | /// \param RAngleLoc the location of the right angle bracket ('>') that | |||
4677 | /// terminates the template-id. | |||
4678 | /// | |||
4679 | /// \param Param the non-type template parameter whose default we are | |||
4680 | /// substituting into. | |||
4681 | /// | |||
4682 | /// \param Converted the list of template arguments provided for template | |||
4683 | /// parameters that precede \p Param in the template parameter list. | |||
4684 | /// | |||
4685 | /// \returns the substituted template argument, or NULL if an error occurred. | |||
4686 | static ExprResult | |||
4687 | SubstDefaultTemplateArgument(Sema &SemaRef, | |||
4688 | TemplateDecl *Template, | |||
4689 | SourceLocation TemplateLoc, | |||
4690 | SourceLocation RAngleLoc, | |||
4691 | NonTypeTemplateParmDecl *Param, | |||
4692 | SmallVectorImpl<TemplateArgument> &Converted) { | |||
4693 | Sema::InstantiatingTemplate Inst(SemaRef, TemplateLoc, | |||
4694 | Param, Template, Converted, | |||
4695 | SourceRange(TemplateLoc, RAngleLoc)); | |||
4696 | if (Inst.isInvalid()) | |||
4697 | return ExprError(); | |||
4698 | ||||
4699 | TemplateArgumentList TemplateArgs(TemplateArgumentList::OnStack, Converted); | |||
4700 | ||||
4701 | // Only substitute for the innermost template argument list. | |||
4702 | MultiLevelTemplateArgumentList TemplateArgLists; | |||
4703 | TemplateArgLists.addOuterTemplateArguments(&TemplateArgs); | |||
4704 | for (unsigned i = 0, e = Param->getDepth(); i != e; ++i) | |||
4705 | TemplateArgLists.addOuterTemplateArguments(None); | |||
4706 | ||||
4707 | Sema::ContextRAII SavedContext(SemaRef, Template->getDeclContext()); | |||
4708 | EnterExpressionEvaluationContext ConstantEvaluated( | |||
4709 | SemaRef, Sema::ExpressionEvaluationContext::ConstantEvaluated); | |||
4710 | return SemaRef.SubstExpr(Param->getDefaultArgument(), TemplateArgLists); | |||
4711 | } | |||
4712 | ||||
4713 | /// Substitute template arguments into the default template argument for | |||
4714 | /// the given template template parameter. | |||
4715 | /// | |||
4716 | /// \param SemaRef the semantic analysis object for which we are performing | |||
4717 | /// the substitution. | |||
4718 | /// | |||
4719 | /// \param Template the template that we are synthesizing template arguments | |||
4720 | /// for. | |||
4721 | /// | |||
4722 | /// \param TemplateLoc the location of the template name that started the | |||
4723 | /// template-id we are checking. | |||
4724 | /// | |||
4725 | /// \param RAngleLoc the location of the right angle bracket ('>') that | |||
4726 | /// terminates the template-id. | |||
4727 | /// | |||
4728 | /// \param Param the template template parameter whose default we are | |||
4729 | /// substituting into. | |||
4730 | /// | |||
4731 | /// \param Converted the list of template arguments provided for template | |||
4732 | /// parameters that precede \p Param in the template parameter list. | |||
4733 | /// | |||
4734 | /// \param QualifierLoc Will be set to the nested-name-specifier (with | |||
4735 | /// source-location information) that precedes the template name. | |||
4736 | /// | |||
4737 | /// \returns the substituted template argument, or NULL if an error occurred. | |||
4738 | static TemplateName | |||
4739 | SubstDefaultTemplateArgument(Sema &SemaRef, | |||
4740 | TemplateDecl *Template, | |||
4741 | SourceLocation TemplateLoc, | |||
4742 | SourceLocation RAngleLoc, | |||
4743 | TemplateTemplateParmDecl *Param, | |||
4744 | SmallVectorImpl<TemplateArgument> &Converted, | |||
4745 | NestedNameSpecifierLoc &QualifierLoc) { | |||
4746 | Sema::InstantiatingTemplate Inst( | |||
4747 | SemaRef, TemplateLoc, TemplateParameter(Param), Template, Converted, | |||
4748 | SourceRange(TemplateLoc, RAngleLoc)); | |||
4749 | if (Inst.isInvalid()) | |||
4750 | return TemplateName(); | |||
4751 | ||||
4752 | TemplateArgumentList TemplateArgs(TemplateArgumentList::OnStack, Converted); | |||
4753 | ||||
4754 | // Only substitute for the innermost template argument list. | |||
4755 | MultiLevelTemplateArgumentList TemplateArgLists; | |||
4756 | TemplateArgLists.addOuterTemplateArguments(&TemplateArgs); | |||
4757 | for (unsigned i = 0, e = Param->getDepth(); i != e; ++i) | |||
4758 | TemplateArgLists.addOuterTemplateArguments(None); | |||
4759 | ||||
4760 | Sema::ContextRAII SavedContext(SemaRef, Template->getDeclContext()); | |||
4761 | // Substitute into the nested-name-specifier first, | |||
4762 | QualifierLoc = Param->getDefaultArgument().getTemplateQualifierLoc(); | |||
4763 | if (QualifierLoc) { | |||
4764 | QualifierLoc = | |||
4765 | SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc, TemplateArgLists); | |||
4766 | if (!QualifierLoc) | |||
4767 | return TemplateName(); | |||
4768 | } | |||
4769 | ||||
4770 | return SemaRef.SubstTemplateName( | |||
4771 | QualifierLoc, | |||
4772 | Param->getDefaultArgument().getArgument().getAsTemplate(), | |||
4773 | Param->getDefaultArgument().getTemplateNameLoc(), | |||
4774 | TemplateArgLists); | |||
4775 | } | |||
4776 | ||||
4777 | /// If the given template parameter has a default template | |||
4778 | /// argument, substitute into that default template argument and | |||
4779 | /// return the corresponding template argument. | |||
4780 | TemplateArgumentLoc | |||
4781 | Sema::SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, | |||
4782 | SourceLocation TemplateLoc, | |||
4783 | SourceLocation RAngleLoc, | |||
4784 | Decl *Param, | |||
4785 | SmallVectorImpl<TemplateArgument> | |||
4786 | &Converted, | |||
4787 | bool &HasDefaultArg) { | |||
4788 | HasDefaultArg = false; | |||
4789 | ||||
4790 | if (TemplateTypeParmDecl *TypeParm = dyn_cast<TemplateTypeParmDecl>(Param)) { | |||
4791 | if (!hasVisibleDefaultArgument(TypeParm)) | |||
4792 | return TemplateArgumentLoc(); | |||
4793 | ||||
4794 | HasDefaultArg = true; | |||
4795 | TypeSourceInfo *DI = SubstDefaultTemplateArgument(*this, Template, | |||
4796 | TemplateLoc, | |||
4797 | RAngleLoc, | |||
4798 | TypeParm, | |||
4799 | Converted); | |||
4800 | if (DI) | |||
4801 | return TemplateArgumentLoc(TemplateArgument(DI->getType()), DI); | |||
4802 | ||||
4803 | return TemplateArgumentLoc(); | |||
4804 | } | |||
4805 | ||||
4806 | if (NonTypeTemplateParmDecl *NonTypeParm | |||
4807 | = dyn_cast<NonTypeTemplateParmDecl>(Param)) { | |||
4808 | if (!hasVisibleDefaultArgument(NonTypeParm)) | |||
4809 | return TemplateArgumentLoc(); | |||
4810 | ||||
4811 | HasDefaultArg = true; | |||
4812 | ExprResult Arg = SubstDefaultTemplateArgument(*this, Template, | |||
4813 | TemplateLoc, | |||
4814 | RAngleLoc, | |||
4815 | NonTypeParm, | |||
4816 | Converted); | |||
4817 | if (Arg.isInvalid()) | |||
4818 | return TemplateArgumentLoc(); | |||
4819 | ||||
4820 | Expr *ArgE = Arg.getAs<Expr>(); | |||
4821 | return TemplateArgumentLoc(TemplateArgument(ArgE), ArgE); | |||
4822 | } | |||
4823 | ||||
4824 | TemplateTemplateParmDecl *TempTempParm | |||
4825 | = cast<TemplateTemplateParmDecl>(Param); | |||
4826 | if (!hasVisibleDefaultArgument(TempTempParm)) | |||
4827 | return TemplateArgumentLoc(); | |||
4828 | ||||
4829 | HasDefaultArg = true; | |||
4830 | NestedNameSpecifierLoc QualifierLoc; | |||
4831 | TemplateName TName = SubstDefaultTemplateArgument(*this, Template, | |||
4832 | TemplateLoc, | |||
4833 | RAngleLoc, | |||
4834 | TempTempParm, | |||
4835 | Converted, | |||
4836 | QualifierLoc); | |||
4837 | if (TName.isNull()) | |||
4838 | return TemplateArgumentLoc(); | |||
4839 | ||||
4840 | return TemplateArgumentLoc(TemplateArgument(TName), | |||
4841 | TempTempParm->getDefaultArgument().getTemplateQualifierLoc(), | |||
4842 | TempTempParm->getDefaultArgument().getTemplateNameLoc()); | |||
4843 | } | |||
4844 | ||||
4845 | /// Convert a template-argument that we parsed as a type into a template, if | |||
4846 | /// possible. C++ permits injected-class-names to perform dual service as | |||
4847 | /// template template arguments and as template type arguments. | |||
4848 | static TemplateArgumentLoc convertTypeTemplateArgumentToTemplate(TypeLoc TLoc) { | |||
4849 | // Extract and step over any surrounding nested-name-specifier. | |||
4850 | NestedNameSpecifierLoc QualLoc; | |||
4851 | if (auto ETLoc = TLoc.getAs<ElaboratedTypeLoc>()) { | |||
4852 | if (ETLoc.getTypePtr()->getKeyword() != ETK_None) | |||
4853 | return TemplateArgumentLoc(); | |||
4854 | ||||
4855 | QualLoc = ETLoc.getQualifierLoc(); | |||
4856 | TLoc = ETLoc.getNamedTypeLoc(); | |||
4857 | } | |||
4858 | ||||
4859 | // If this type was written as an injected-class-name, it can be used as a | |||
4860 | // template template argument. | |||
4861 | if (auto InjLoc = TLoc.getAs<InjectedClassNameTypeLoc>()) | |||
4862 | return TemplateArgumentLoc(InjLoc.getTypePtr()->getTemplateName(), | |||
4863 | QualLoc, InjLoc.getNameLoc()); | |||
4864 | ||||
4865 | // If this type was written as an injected-class-name, it may have been | |||
4866 | // converted to a RecordType during instantiation. If the RecordType is | |||
4867 | // *not* wrapped in a TemplateSpecializationType and denotes a class | |||
4868 | // template specialization, it must have come from an injected-class-name. | |||
4869 | if (auto RecLoc = TLoc.getAs<RecordTypeLoc>()) | |||
4870 | if (auto *CTSD = | |||
4871 | dyn_cast<ClassTemplateSpecializationDecl>(RecLoc.getDecl())) | |||
4872 | return TemplateArgumentLoc(TemplateName(CTSD->getSpecializedTemplate()), | |||
4873 | QualLoc, RecLoc.getNameLoc()); | |||
4874 | ||||
4875 | return TemplateArgumentLoc(); | |||
4876 | } | |||
4877 | ||||
4878 | /// Check that the given template argument corresponds to the given | |||
4879 | /// template parameter. | |||
4880 | /// | |||
4881 | /// \param Param The template parameter against which the argument will be | |||
4882 | /// checked. | |||
4883 | /// | |||
4884 | /// \param Arg The template argument, which may be updated due to conversions. | |||
4885 | /// | |||
4886 | /// \param Template The template in which the template argument resides. | |||
4887 | /// | |||
4888 | /// \param TemplateLoc The location of the template name for the template | |||
4889 | /// whose argument list we're matching. | |||
4890 | /// | |||
4891 | /// \param RAngleLoc The location of the right angle bracket ('>') that closes | |||
4892 | /// the template argument list. | |||
4893 | /// | |||
4894 | /// \param ArgumentPackIndex The index into the argument pack where this | |||
4895 | /// argument will be placed. Only valid if the parameter is a parameter pack. | |||
4896 | /// | |||
4897 | /// \param Converted The checked, converted argument will be added to the | |||
4898 | /// end of this small vector. | |||
4899 | /// | |||
4900 | /// \param CTAK Describes how we arrived at this particular template argument: | |||
4901 | /// explicitly written, deduced, etc. | |||
4902 | /// | |||
4903 | /// \returns true on error, false otherwise. | |||
4904 | bool Sema::CheckTemplateArgument(NamedDecl *Param, | |||
4905 | TemplateArgumentLoc &Arg, | |||
4906 | NamedDecl *Template, | |||
4907 | SourceLocation TemplateLoc, | |||
4908 | SourceLocation RAngleLoc, | |||
4909 | unsigned ArgumentPackIndex, | |||
4910 | SmallVectorImpl<TemplateArgument> &Converted, | |||
4911 | CheckTemplateArgumentKind CTAK) { | |||
4912 | // Check template type parameters. | |||
4913 | if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(Param)) | |||
4914 | return CheckTemplateTypeArgument(TTP, Arg, Converted); | |||
4915 | ||||
4916 | // Check non-type template parameters. | |||
4917 | if (NonTypeTemplateParmDecl *NTTP =dyn_cast<NonTypeTemplateParmDecl>(Param)) { | |||
4918 | // Do substitution on the type of the non-type template parameter | |||
4919 | // with the template arguments we've seen thus far. But if the | |||
4920 | // template has a dependent context then we cannot substitute yet. | |||
4921 | QualType NTTPType = NTTP->getType(); | |||
4922 | if (NTTP->isParameterPack() && NTTP->isExpandedParameterPack()) | |||
4923 | NTTPType = NTTP->getExpansionType(ArgumentPackIndex); | |||
4924 | ||||
4925 | // FIXME: Do we need to substitute into parameters here if they're | |||
4926 | // instantiation-dependent but not dependent? | |||
4927 | if (NTTPType->isDependentType() && | |||
4928 | !isa<TemplateTemplateParmDecl>(Template) && | |||
4929 | !Template->getDeclContext()->isDependentContext()) { | |||
4930 | // Do substitution on the type of the non-type template parameter. | |||
4931 | InstantiatingTemplate Inst(*this, TemplateLoc, Template, | |||
4932 | NTTP, Converted, | |||
4933 | SourceRange(TemplateLoc, RAngleLoc)); | |||
4934 | if (Inst.isInvalid()) | |||
4935 | return true; | |||
4936 | ||||
4937 | TemplateArgumentList TemplateArgs(TemplateArgumentList::OnStack, | |||
4938 | Converted); | |||
4939 | ||||
4940 | // If the parameter is a pack expansion, expand this slice of the pack. | |||
4941 | if (auto *PET = NTTPType->getAs<PackExpansionType>()) { | |||
4942 | Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(*this, | |||
4943 | ArgumentPackIndex); | |||
4944 | NTTPType = SubstType(PET->getPattern(), | |||
4945 | MultiLevelTemplateArgumentList(TemplateArgs), | |||
4946 | NTTP->getLocation(), | |||
4947 | NTTP->getDeclName()); | |||
4948 | } else { | |||
4949 | NTTPType = SubstType(NTTPType, | |||
4950 | MultiLevelTemplateArgumentList(TemplateArgs), | |||
4951 | NTTP->getLocation(), | |||
4952 | NTTP->getDeclName()); | |||
4953 | } | |||
4954 | ||||
4955 | // If that worked, check the non-type template parameter type | |||
4956 | // for validity. | |||
4957 | if (!NTTPType.isNull()) | |||
4958 | NTTPType = CheckNonTypeTemplateParameterType(NTTPType, | |||
4959 | NTTP->getLocation()); | |||
4960 | if (NTTPType.isNull()) | |||
4961 | return true; | |||
4962 | } | |||
4963 | ||||
4964 | switch (Arg.getArgument().getKind()) { | |||
4965 | case TemplateArgument::Null: | |||
4966 | llvm_unreachable("Should never see a NULL template argument here")::llvm::llvm_unreachable_internal("Should never see a NULL template argument here" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 4966); | |||
4967 | ||||
4968 | case TemplateArgument::Expression: { | |||
4969 | TemplateArgument Result; | |||
4970 | unsigned CurSFINAEErrors = NumSFINAEErrors; | |||
4971 | ExprResult Res = | |||
4972 | CheckTemplateArgument(NTTP, NTTPType, Arg.getArgument().getAsExpr(), | |||
4973 | Result, CTAK); | |||
4974 | if (Res.isInvalid()) | |||
4975 | return true; | |||
4976 | // If the current template argument causes an error, give up now. | |||
4977 | if (CurSFINAEErrors < NumSFINAEErrors) | |||
4978 | return true; | |||
4979 | ||||
4980 | // If the resulting expression is new, then use it in place of the | |||
4981 | // old expression in the template argument. | |||
4982 | if (Res.get() != Arg.getArgument().getAsExpr()) { | |||
4983 | TemplateArgument TA(Res.get()); | |||
4984 | Arg = TemplateArgumentLoc(TA, Res.get()); | |||
4985 | } | |||
4986 | ||||
4987 | Converted.push_back(Result); | |||
4988 | break; | |||
4989 | } | |||
4990 | ||||
4991 | case TemplateArgument::Declaration: | |||
4992 | case TemplateArgument::Integral: | |||
4993 | case TemplateArgument::NullPtr: | |||
4994 | // We've already checked this template argument, so just copy | |||
4995 | // it to the list of converted arguments. | |||
4996 | Converted.push_back(Arg.getArgument()); | |||
4997 | break; | |||
4998 | ||||
4999 | case TemplateArgument::Template: | |||
5000 | case TemplateArgument::TemplateExpansion: | |||
5001 | // We were given a template template argument. It may not be ill-formed; | |||
5002 | // see below. | |||
5003 | if (DependentTemplateName *DTN | |||
5004 | = Arg.getArgument().getAsTemplateOrTemplatePattern() | |||
5005 | .getAsDependentTemplateName()) { | |||
5006 | // We have a template argument such as \c T::template X, which we | |||
5007 | // parsed as a template template argument. However, since we now | |||
5008 | // know that we need a non-type template argument, convert this | |||
5009 | // template name into an expression. | |||
5010 | ||||
5011 | DeclarationNameInfo NameInfo(DTN->getIdentifier(), | |||
5012 | Arg.getTemplateNameLoc()); | |||
5013 | ||||
5014 | CXXScopeSpec SS; | |||
5015 | SS.Adopt(Arg.getTemplateQualifierLoc()); | |||
5016 | // FIXME: the template-template arg was a DependentTemplateName, | |||
5017 | // so it was provided with a template keyword. However, its source | |||
5018 | // location is not stored in the template argument structure. | |||
5019 | SourceLocation TemplateKWLoc; | |||
5020 | ExprResult E = DependentScopeDeclRefExpr::Create( | |||
5021 | Context, SS.getWithLocInContext(Context), TemplateKWLoc, NameInfo, | |||
5022 | nullptr); | |||
5023 | ||||
5024 | // If we parsed the template argument as a pack expansion, create a | |||
5025 | // pack expansion expression. | |||
5026 | if (Arg.getArgument().getKind() == TemplateArgument::TemplateExpansion){ | |||
5027 | E = ActOnPackExpansion(E.get(), Arg.getTemplateEllipsisLoc()); | |||
5028 | if (E.isInvalid()) | |||
5029 | return true; | |||
5030 | } | |||
5031 | ||||
5032 | TemplateArgument Result; | |||
5033 | E = CheckTemplateArgument(NTTP, NTTPType, E.get(), Result); | |||
5034 | if (E.isInvalid()) | |||
5035 | return true; | |||
5036 | ||||
5037 | Converted.push_back(Result); | |||
5038 | break; | |||
5039 | } | |||
5040 | ||||
5041 | // We have a template argument that actually does refer to a class | |||
5042 | // template, alias template, or template template parameter, and | |||
5043 | // therefore cannot be a non-type template argument. | |||
5044 | Diag(Arg.getLocation(), diag::err_template_arg_must_be_expr) | |||
5045 | << Arg.getSourceRange(); | |||
5046 | ||||
5047 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
5048 | return true; | |||
5049 | ||||
5050 | case TemplateArgument::Type: { | |||
5051 | // We have a non-type template parameter but the template | |||
5052 | // argument is a type. | |||
5053 | ||||
5054 | // C++ [temp.arg]p2: | |||
5055 | // In a template-argument, an ambiguity between a type-id and | |||
5056 | // an expression is resolved to a type-id, regardless of the | |||
5057 | // form of the corresponding template-parameter. | |||
5058 | // | |||
5059 | // We warn specifically about this case, since it can be rather | |||
5060 | // confusing for users. | |||
5061 | QualType T = Arg.getArgument().getAsType(); | |||
5062 | SourceRange SR = Arg.getSourceRange(); | |||
5063 | if (T->isFunctionType()) | |||
5064 | Diag(SR.getBegin(), diag::err_template_arg_nontype_ambig) << SR << T; | |||
5065 | else | |||
5066 | Diag(SR.getBegin(), diag::err_template_arg_must_be_expr) << SR; | |||
5067 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
5068 | return true; | |||
5069 | } | |||
5070 | ||||
5071 | case TemplateArgument::Pack: | |||
5072 | llvm_unreachable("Caller must expand template argument packs")::llvm::llvm_unreachable_internal("Caller must expand template argument packs" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 5072); | |||
5073 | } | |||
5074 | ||||
5075 | return false; | |||
5076 | } | |||
5077 | ||||
5078 | ||||
5079 | // Check template template parameters. | |||
5080 | TemplateTemplateParmDecl *TempParm = cast<TemplateTemplateParmDecl>(Param); | |||
5081 | ||||
5082 | TemplateParameterList *Params = TempParm->getTemplateParameters(); | |||
5083 | if (TempParm->isExpandedParameterPack()) | |||
5084 | Params = TempParm->getExpansionTemplateParameters(ArgumentPackIndex); | |||
5085 | ||||
5086 | // Substitute into the template parameter list of the template | |||
5087 | // template parameter, since previously-supplied template arguments | |||
5088 | // may appear within the template template parameter. | |||
5089 | // | |||
5090 | // FIXME: Skip this if the parameters aren't instantiation-dependent. | |||
5091 | { | |||
5092 | // Set up a template instantiation context. | |||
5093 | LocalInstantiationScope Scope(*this); | |||
5094 | InstantiatingTemplate Inst(*this, TemplateLoc, Template, | |||
5095 | TempParm, Converted, | |||
5096 | SourceRange(TemplateLoc, RAngleLoc)); | |||
5097 | if (Inst.isInvalid()) | |||
5098 | return true; | |||
5099 | ||||
5100 | TemplateArgumentList TemplateArgs(TemplateArgumentList::OnStack, Converted); | |||
5101 | Params = SubstTemplateParams(Params, CurContext, | |||
5102 | MultiLevelTemplateArgumentList(TemplateArgs)); | |||
5103 | if (!Params) | |||
5104 | return true; | |||
5105 | } | |||
5106 | ||||
5107 | // C++1z [temp.local]p1: (DR1004) | |||
5108 | // When [the injected-class-name] is used [...] as a template-argument for | |||
5109 | // a template template-parameter [...] it refers to the class template | |||
5110 | // itself. | |||
5111 | if (Arg.getArgument().getKind() == TemplateArgument::Type) { | |||
5112 | TemplateArgumentLoc ConvertedArg = convertTypeTemplateArgumentToTemplate( | |||
5113 | Arg.getTypeSourceInfo()->getTypeLoc()); | |||
5114 | if (!ConvertedArg.getArgument().isNull()) | |||
5115 | Arg = ConvertedArg; | |||
5116 | } | |||
5117 | ||||
5118 | switch (Arg.getArgument().getKind()) { | |||
5119 | case TemplateArgument::Null: | |||
5120 | llvm_unreachable("Should never see a NULL template argument here")::llvm::llvm_unreachable_internal("Should never see a NULL template argument here" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 5120); | |||
5121 | ||||
5122 | case TemplateArgument::Template: | |||
5123 | case TemplateArgument::TemplateExpansion: | |||
5124 | if (CheckTemplateTemplateArgument(Params, Arg)) | |||
5125 | return true; | |||
5126 | ||||
5127 | Converted.push_back(Arg.getArgument()); | |||
5128 | break; | |||
5129 | ||||
5130 | case TemplateArgument::Expression: | |||
5131 | case TemplateArgument::Type: | |||
5132 | // We have a template template parameter but the template | |||
5133 | // argument does not refer to a template. | |||
5134 | Diag(Arg.getLocation(), diag::err_template_arg_must_be_template) | |||
5135 | << getLangOpts().CPlusPlus11; | |||
5136 | return true; | |||
5137 | ||||
5138 | case TemplateArgument::Declaration: | |||
5139 | llvm_unreachable("Declaration argument with template template parameter")::llvm::llvm_unreachable_internal("Declaration argument with template template parameter" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 5139); | |||
5140 | case TemplateArgument::Integral: | |||
5141 | llvm_unreachable("Integral argument with template template parameter")::llvm::llvm_unreachable_internal("Integral argument with template template parameter" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 5141); | |||
5142 | case TemplateArgument::NullPtr: | |||
5143 | llvm_unreachable("Null pointer argument with template template parameter")::llvm::llvm_unreachable_internal("Null pointer argument with template template parameter" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 5143); | |||
5144 | ||||
5145 | case TemplateArgument::Pack: | |||
5146 | llvm_unreachable("Caller must expand template argument packs")::llvm::llvm_unreachable_internal("Caller must expand template argument packs" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 5146); | |||
5147 | } | |||
5148 | ||||
5149 | return false; | |||
5150 | } | |||
5151 | ||||
5152 | /// Check whether the template parameter is a pack expansion, and if so, | |||
5153 | /// determine the number of parameters produced by that expansion. For instance: | |||
5154 | /// | |||
5155 | /// \code | |||
5156 | /// template<typename ...Ts> struct A { | |||
5157 | /// template<Ts ...NTs, template<Ts> class ...TTs, typename ...Us> struct B; | |||
5158 | /// }; | |||
5159 | /// \endcode | |||
5160 | /// | |||
5161 | /// In \c A<int,int>::B, \c NTs and \c TTs have expanded pack size 2, and \c Us | |||
5162 | /// is not a pack expansion, so returns an empty Optional. | |||
5163 | static Optional<unsigned> getExpandedPackSize(NamedDecl *Param) { | |||
5164 | if (NonTypeTemplateParmDecl *NTTP | |||
5165 | = dyn_cast<NonTypeTemplateParmDecl>(Param)) { | |||
5166 | if (NTTP->isExpandedParameterPack()) | |||
5167 | return NTTP->getNumExpansionTypes(); | |||
5168 | } | |||
5169 | ||||
5170 | if (TemplateTemplateParmDecl *TTP | |||
5171 | = dyn_cast<TemplateTemplateParmDecl>(Param)) { | |||
5172 | if (TTP->isExpandedParameterPack()) | |||
5173 | return TTP->getNumExpansionTemplateParameters(); | |||
5174 | } | |||
5175 | ||||
5176 | return None; | |||
5177 | } | |||
5178 | ||||
5179 | /// Diagnose a missing template argument. | |||
5180 | template<typename TemplateParmDecl> | |||
5181 | static bool diagnoseMissingArgument(Sema &S, SourceLocation Loc, | |||
5182 | TemplateDecl *TD, | |||
5183 | const TemplateParmDecl *D, | |||
5184 | TemplateArgumentListInfo &Args) { | |||
5185 | // Dig out the most recent declaration of the template parameter; there may be | |||
5186 | // declarations of the template that are more recent than TD. | |||
5187 | D = cast<TemplateParmDecl>(cast<TemplateDecl>(TD->getMostRecentDecl()) | |||
5188 | ->getTemplateParameters() | |||
5189 | ->getParam(D->getIndex())); | |||
5190 | ||||
5191 | // If there's a default argument that's not visible, diagnose that we're | |||
5192 | // missing a module import. | |||
5193 | llvm::SmallVector<Module*, 8> Modules; | |||
5194 | if (D->hasDefaultArgument() && !S.hasVisibleDefaultArgument(D, &Modules)) { | |||
5195 | S.diagnoseMissingImport(Loc, cast<NamedDecl>(TD), | |||
5196 | D->getDefaultArgumentLoc(), Modules, | |||
5197 | Sema::MissingImportKind::DefaultArgument, | |||
5198 | /*Recover*/true); | |||
5199 | return true; | |||
5200 | } | |||
5201 | ||||
5202 | // FIXME: If there's a more recent default argument that *is* visible, | |||
5203 | // diagnose that it was declared too late. | |||
5204 | ||||
5205 | TemplateParameterList *Params = TD->getTemplateParameters(); | |||
5206 | ||||
5207 | S.Diag(Loc, diag::err_template_arg_list_different_arity) | |||
5208 | << /*not enough args*/0 | |||
5209 | << (int)S.getTemplateNameKindForDiagnostics(TemplateName(TD)) | |||
5210 | << TD; | |||
5211 | S.Diag(TD->getLocation(), diag::note_template_decl_here) | |||
5212 | << Params->getSourceRange(); | |||
5213 | return true; | |||
5214 | } | |||
5215 | ||||
5216 | /// Check that the given template argument list is well-formed | |||
5217 | /// for specializing the given template. | |||
5218 | bool Sema::CheckTemplateArgumentList( | |||
5219 | TemplateDecl *Template, SourceLocation TemplateLoc, | |||
5220 | TemplateArgumentListInfo &TemplateArgs, bool PartialTemplateArgs, | |||
5221 | SmallVectorImpl<TemplateArgument> &Converted, | |||
5222 | bool UpdateArgsWithConversions) { | |||
5223 | // Make a copy of the template arguments for processing. Only make the | |||
5224 | // changes at the end when successful in matching the arguments to the | |||
5225 | // template. | |||
5226 | TemplateArgumentListInfo NewArgs = TemplateArgs; | |||
5227 | ||||
5228 | // Make sure we get the template parameter list from the most | |||
5229 | // recentdeclaration, since that is the only one that has is guaranteed to | |||
5230 | // have all the default template argument information. | |||
5231 | TemplateParameterList *Params = | |||
5232 | cast<TemplateDecl>(Template->getMostRecentDecl()) | |||
5233 | ->getTemplateParameters(); | |||
5234 | ||||
5235 | SourceLocation RAngleLoc = NewArgs.getRAngleLoc(); | |||
5236 | ||||
5237 | // C++ [temp.arg]p1: | |||
5238 | // [...] The type and form of each template-argument specified in | |||
5239 | // a template-id shall match the type and form specified for the | |||
5240 | // corresponding parameter declared by the template in its | |||
5241 | // template-parameter-list. | |||
5242 | bool isTemplateTemplateParameter = isa<TemplateTemplateParmDecl>(Template); | |||
5243 | SmallVector<TemplateArgument, 2> ArgumentPack; | |||
5244 | unsigned ArgIdx = 0, NumArgs = NewArgs.size(); | |||
5245 | LocalInstantiationScope InstScope(*this, true); | |||
5246 | for (TemplateParameterList::iterator Param = Params->begin(), | |||
5247 | ParamEnd = Params->end(); | |||
5248 | Param != ParamEnd; /* increment in loop */) { | |||
5249 | // If we have an expanded parameter pack, make sure we don't have too | |||
5250 | // many arguments. | |||
5251 | if (Optional<unsigned> Expansions = getExpandedPackSize(*Param)) { | |||
5252 | if (*Expansions == ArgumentPack.size()) { | |||
5253 | // We're done with this parameter pack. Pack up its arguments and add | |||
5254 | // them to the list. | |||
5255 | Converted.push_back( | |||
5256 | TemplateArgument::CreatePackCopy(Context, ArgumentPack)); | |||
5257 | ArgumentPack.clear(); | |||
5258 | ||||
5259 | // This argument is assigned to the next parameter. | |||
5260 | ++Param; | |||
5261 | continue; | |||
5262 | } else if (ArgIdx == NumArgs && !PartialTemplateArgs) { | |||
5263 | // Not enough arguments for this parameter pack. | |||
5264 | Diag(TemplateLoc, diag::err_template_arg_list_different_arity) | |||
5265 | << /*not enough args*/0 | |||
5266 | << (int)getTemplateNameKindForDiagnostics(TemplateName(Template)) | |||
5267 | << Template; | |||
5268 | Diag(Template->getLocation(), diag::note_template_decl_here) | |||
5269 | << Params->getSourceRange(); | |||
5270 | return true; | |||
5271 | } | |||
5272 | } | |||
5273 | ||||
5274 | if (ArgIdx < NumArgs) { | |||
5275 | // Check the template argument we were given. | |||
5276 | if (CheckTemplateArgument(*Param, NewArgs[ArgIdx], Template, | |||
5277 | TemplateLoc, RAngleLoc, | |||
5278 | ArgumentPack.size(), Converted)) | |||
5279 | return true; | |||
5280 | ||||
5281 | bool PackExpansionIntoNonPack = | |||
5282 | NewArgs[ArgIdx].getArgument().isPackExpansion() && | |||
5283 | (!(*Param)->isTemplateParameterPack() || getExpandedPackSize(*Param)); | |||
5284 | if (PackExpansionIntoNonPack && isa<TypeAliasTemplateDecl>(Template)) { | |||
5285 | // Core issue 1430: we have a pack expansion as an argument to an | |||
5286 | // alias template, and it's not part of a parameter pack. This | |||
5287 | // can't be canonicalized, so reject it now. | |||
5288 | Diag(NewArgs[ArgIdx].getLocation(), | |||
5289 | diag::err_alias_template_expansion_into_fixed_list) | |||
5290 | << NewArgs[ArgIdx].getSourceRange(); | |||
5291 | Diag((*Param)->getLocation(), diag::note_template_param_here); | |||
5292 | return true; | |||
5293 | } | |||
5294 | ||||
5295 | // We're now done with this argument. | |||
5296 | ++ArgIdx; | |||
5297 | ||||
5298 | if ((*Param)->isTemplateParameterPack()) { | |||
5299 | // The template parameter was a template parameter pack, so take the | |||
5300 | // deduced argument and place it on the argument pack. Note that we | |||
5301 | // stay on the same template parameter so that we can deduce more | |||
5302 | // arguments. | |||
5303 | ArgumentPack.push_back(Converted.pop_back_val()); | |||
5304 | } else { | |||
5305 | // Move to the next template parameter. | |||
5306 | ++Param; | |||
5307 | } | |||
5308 | ||||
5309 | // If we just saw a pack expansion into a non-pack, then directly convert | |||
5310 | // the remaining arguments, because we don't know what parameters they'll | |||
5311 | // match up with. | |||
5312 | if (PackExpansionIntoNonPack) { | |||
5313 | if (!ArgumentPack.empty()) { | |||
5314 | // If we were part way through filling in an expanded parameter pack, | |||
5315 | // fall back to just producing individual arguments. | |||
5316 | Converted.insert(Converted.end(), | |||
5317 | ArgumentPack.begin(), ArgumentPack.end()); | |||
5318 | ArgumentPack.clear(); | |||
5319 | } | |||
5320 | ||||
5321 | while (ArgIdx < NumArgs) { | |||
5322 | Converted.push_back(NewArgs[ArgIdx].getArgument()); | |||
5323 | ++ArgIdx; | |||
5324 | } | |||
5325 | ||||
5326 | return false; | |||
5327 | } | |||
5328 | ||||
5329 | continue; | |||
5330 | } | |||
5331 | ||||
5332 | // If we're checking a partial template argument list, we're done. | |||
5333 | if (PartialTemplateArgs) { | |||
5334 | if ((*Param)->isTemplateParameterPack() && !ArgumentPack.empty()) | |||
5335 | Converted.push_back( | |||
5336 | TemplateArgument::CreatePackCopy(Context, ArgumentPack)); | |||
5337 | ||||
5338 | return false; | |||
5339 | } | |||
5340 | ||||
5341 | // If we have a template parameter pack with no more corresponding | |||
5342 | // arguments, just break out now and we'll fill in the argument pack below. | |||
5343 | if ((*Param)->isTemplateParameterPack()) { | |||
5344 | assert(!getExpandedPackSize(*Param) &&((!getExpandedPackSize(*Param) && "Should have dealt with this already" ) ? static_cast<void> (0) : __assert_fail ("!getExpandedPackSize(*Param) && \"Should have dealt with this already\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 5345, __PRETTY_FUNCTION__)) | |||
5345 | "Should have dealt with this already")((!getExpandedPackSize(*Param) && "Should have dealt with this already" ) ? static_cast<void> (0) : __assert_fail ("!getExpandedPackSize(*Param) && \"Should have dealt with this already\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 5345, __PRETTY_FUNCTION__)); | |||
5346 | ||||
5347 | // A non-expanded parameter pack before the end of the parameter list | |||
5348 | // only occurs for an ill-formed template parameter list, unless we've | |||
5349 | // got a partial argument list for a function template, so just bail out. | |||
5350 | if (Param + 1 != ParamEnd) | |||
5351 | return true; | |||
5352 | ||||
5353 | Converted.push_back( | |||
5354 | TemplateArgument::CreatePackCopy(Context, ArgumentPack)); | |||
5355 | ArgumentPack.clear(); | |||
5356 | ||||
5357 | ++Param; | |||
5358 | continue; | |||
5359 | } | |||
5360 | ||||
5361 | // Check whether we have a default argument. | |||
5362 | TemplateArgumentLoc Arg; | |||
5363 | ||||
5364 | // Retrieve the default template argument from the template | |||
5365 | // parameter. For each kind of template parameter, we substitute the | |||
5366 | // template arguments provided thus far and any "outer" template arguments | |||
5367 | // (when the template parameter was part of a nested template) into | |||
5368 | // the default argument. | |||
5369 | if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*Param)) { | |||
5370 | if (!hasVisibleDefaultArgument(TTP)) | |||
5371 | return diagnoseMissingArgument(*this, TemplateLoc, Template, TTP, | |||
5372 | NewArgs); | |||
5373 | ||||
5374 | TypeSourceInfo *ArgType = SubstDefaultTemplateArgument(*this, | |||
5375 | Template, | |||
5376 | TemplateLoc, | |||
5377 | RAngleLoc, | |||
5378 | TTP, | |||
5379 | Converted); | |||
5380 | if (!ArgType) | |||
5381 | return true; | |||
5382 | ||||
5383 | Arg = TemplateArgumentLoc(TemplateArgument(ArgType->getType()), | |||
5384 | ArgType); | |||
5385 | } else if (NonTypeTemplateParmDecl *NTTP | |||
5386 | = dyn_cast<NonTypeTemplateParmDecl>(*Param)) { | |||
5387 | if (!hasVisibleDefaultArgument(NTTP)) | |||
5388 | return diagnoseMissingArgument(*this, TemplateLoc, Template, NTTP, | |||
5389 | NewArgs); | |||
5390 | ||||
5391 | ExprResult E = SubstDefaultTemplateArgument(*this, Template, | |||
5392 | TemplateLoc, | |||
5393 | RAngleLoc, | |||
5394 | NTTP, | |||
5395 | Converted); | |||
5396 | if (E.isInvalid()) | |||
5397 | return true; | |||
5398 | ||||
5399 | Expr *Ex = E.getAs<Expr>(); | |||
5400 | Arg = TemplateArgumentLoc(TemplateArgument(Ex), Ex); | |||
5401 | } else { | |||
5402 | TemplateTemplateParmDecl *TempParm | |||
5403 | = cast<TemplateTemplateParmDecl>(*Param); | |||
5404 | ||||
5405 | if (!hasVisibleDefaultArgument(TempParm)) | |||
5406 | return diagnoseMissingArgument(*this, TemplateLoc, Template, TempParm, | |||
5407 | NewArgs); | |||
5408 | ||||
5409 | NestedNameSpecifierLoc QualifierLoc; | |||
5410 | TemplateName Name = SubstDefaultTemplateArgument(*this, Template, | |||
5411 | TemplateLoc, | |||
5412 | RAngleLoc, | |||
5413 | TempParm, | |||
5414 | Converted, | |||
5415 | QualifierLoc); | |||
5416 | if (Name.isNull()) | |||
5417 | return true; | |||
5418 | ||||
5419 | Arg = TemplateArgumentLoc(TemplateArgument(Name), QualifierLoc, | |||
5420 | TempParm->getDefaultArgument().getTemplateNameLoc()); | |||
5421 | } | |||
5422 | ||||
5423 | // Introduce an instantiation record that describes where we are using | |||
5424 | // the default template argument. We're not actually instantiating a | |||
5425 | // template here, we just create this object to put a note into the | |||
5426 | // context stack. | |||
5427 | InstantiatingTemplate Inst(*this, RAngleLoc, Template, *Param, Converted, | |||
5428 | SourceRange(TemplateLoc, RAngleLoc)); | |||
5429 | if (Inst.isInvalid()) | |||
5430 | return true; | |||
5431 | ||||
5432 | // Check the default template argument. | |||
5433 | if (CheckTemplateArgument(*Param, Arg, Template, TemplateLoc, | |||
5434 | RAngleLoc, 0, Converted)) | |||
5435 | return true; | |||
5436 | ||||
5437 | // Core issue 150 (assumed resolution): if this is a template template | |||
5438 | // parameter, keep track of the default template arguments from the | |||
5439 | // template definition. | |||
5440 | if (isTemplateTemplateParameter) | |||
5441 | NewArgs.addArgument(Arg); | |||
5442 | ||||
5443 | // Move to the next template parameter and argument. | |||
5444 | ++Param; | |||
5445 | ++ArgIdx; | |||
5446 | } | |||
5447 | ||||
5448 | // If we're performing a partial argument substitution, allow any trailing | |||
5449 | // pack expansions; they might be empty. This can happen even if | |||
5450 | // PartialTemplateArgs is false (the list of arguments is complete but | |||
5451 | // still dependent). | |||
5452 | if (ArgIdx < NumArgs && CurrentInstantiationScope && | |||
5453 | CurrentInstantiationScope->getPartiallySubstitutedPack()) { | |||
5454 | while (ArgIdx < NumArgs && NewArgs[ArgIdx].getArgument().isPackExpansion()) | |||
5455 | Converted.push_back(NewArgs[ArgIdx++].getArgument()); | |||
5456 | } | |||
5457 | ||||
5458 | // If we have any leftover arguments, then there were too many arguments. | |||
5459 | // Complain and fail. | |||
5460 | if (ArgIdx < NumArgs) { | |||
5461 | Diag(TemplateLoc, diag::err_template_arg_list_different_arity) | |||
5462 | << /*too many args*/1 | |||
5463 | << (int)getTemplateNameKindForDiagnostics(TemplateName(Template)) | |||
5464 | << Template | |||
5465 | << SourceRange(NewArgs[ArgIdx].getLocation(), NewArgs.getRAngleLoc()); | |||
5466 | Diag(Template->getLocation(), diag::note_template_decl_here) | |||
5467 | << Params->getSourceRange(); | |||
5468 | return true; | |||
5469 | } | |||
5470 | ||||
5471 | // No problems found with the new argument list, propagate changes back | |||
5472 | // to caller. | |||
5473 | if (UpdateArgsWithConversions) | |||
5474 | TemplateArgs = std::move(NewArgs); | |||
5475 | ||||
5476 | return false; | |||
5477 | } | |||
5478 | ||||
5479 | namespace { | |||
5480 | class UnnamedLocalNoLinkageFinder | |||
5481 | : public TypeVisitor<UnnamedLocalNoLinkageFinder, bool> | |||
5482 | { | |||
5483 | Sema &S; | |||
5484 | SourceRange SR; | |||
5485 | ||||
5486 | typedef TypeVisitor<UnnamedLocalNoLinkageFinder, bool> inherited; | |||
5487 | ||||
5488 | public: | |||
5489 | UnnamedLocalNoLinkageFinder(Sema &S, SourceRange SR) : S(S), SR(SR) { } | |||
5490 | ||||
5491 | bool Visit(QualType T) { | |||
5492 | return T.isNull() ? false : inherited::Visit(T.getTypePtr()); | |||
5493 | } | |||
5494 | ||||
5495 | #define TYPE(Class, Parent) \ | |||
5496 | bool Visit##Class##Type(const Class##Type *); | |||
5497 | #define ABSTRACT_TYPE(Class, Parent) \ | |||
5498 | bool Visit##Class##Type(const Class##Type *) { return false; } | |||
5499 | #define NON_CANONICAL_TYPE(Class, Parent) \ | |||
5500 | bool Visit##Class##Type(const Class##Type *) { return false; } | |||
5501 | #include "clang/AST/TypeNodes.inc" | |||
5502 | ||||
5503 | bool VisitTagDecl(const TagDecl *Tag); | |||
5504 | bool VisitNestedNameSpecifier(NestedNameSpecifier *NNS); | |||
5505 | }; | |||
5506 | } // end anonymous namespace | |||
5507 | ||||
5508 | bool UnnamedLocalNoLinkageFinder::VisitBuiltinType(const BuiltinType*) { | |||
5509 | return false; | |||
5510 | } | |||
5511 | ||||
5512 | bool UnnamedLocalNoLinkageFinder::VisitComplexType(const ComplexType* T) { | |||
5513 | return Visit(T->getElementType()); | |||
5514 | } | |||
5515 | ||||
5516 | bool UnnamedLocalNoLinkageFinder::VisitPointerType(const PointerType* T) { | |||
5517 | return Visit(T->getPointeeType()); | |||
5518 | } | |||
5519 | ||||
5520 | bool UnnamedLocalNoLinkageFinder::VisitBlockPointerType( | |||
5521 | const BlockPointerType* T) { | |||
5522 | return Visit(T->getPointeeType()); | |||
5523 | } | |||
5524 | ||||
5525 | bool UnnamedLocalNoLinkageFinder::VisitLValueReferenceType( | |||
5526 | const LValueReferenceType* T) { | |||
5527 | return Visit(T->getPointeeType()); | |||
5528 | } | |||
5529 | ||||
5530 | bool UnnamedLocalNoLinkageFinder::VisitRValueReferenceType( | |||
5531 | const RValueReferenceType* T) { | |||
5532 | return Visit(T->getPointeeType()); | |||
5533 | } | |||
5534 | ||||
5535 | bool UnnamedLocalNoLinkageFinder::VisitMemberPointerType( | |||
5536 | const MemberPointerType* T) { | |||
5537 | return Visit(T->getPointeeType()) || Visit(QualType(T->getClass(), 0)); | |||
5538 | } | |||
5539 | ||||
5540 | bool UnnamedLocalNoLinkageFinder::VisitConstantArrayType( | |||
5541 | const ConstantArrayType* T) { | |||
5542 | return Visit(T->getElementType()); | |||
5543 | } | |||
5544 | ||||
5545 | bool UnnamedLocalNoLinkageFinder::VisitIncompleteArrayType( | |||
5546 | const IncompleteArrayType* T) { | |||
5547 | return Visit(T->getElementType()); | |||
5548 | } | |||
5549 | ||||
5550 | bool UnnamedLocalNoLinkageFinder::VisitVariableArrayType( | |||
5551 | const VariableArrayType* T) { | |||
5552 | return Visit(T->getElementType()); | |||
5553 | } | |||
5554 | ||||
5555 | bool UnnamedLocalNoLinkageFinder::VisitDependentSizedArrayType( | |||
5556 | const DependentSizedArrayType* T) { | |||
5557 | return Visit(T->getElementType()); | |||
5558 | } | |||
5559 | ||||
5560 | bool UnnamedLocalNoLinkageFinder::VisitDependentSizedExtVectorType( | |||
5561 | const DependentSizedExtVectorType* T) { | |||
5562 | return Visit(T->getElementType()); | |||
5563 | } | |||
5564 | ||||
5565 | bool UnnamedLocalNoLinkageFinder::VisitDependentAddressSpaceType( | |||
5566 | const DependentAddressSpaceType *T) { | |||
5567 | return Visit(T->getPointeeType()); | |||
5568 | } | |||
5569 | ||||
5570 | bool UnnamedLocalNoLinkageFinder::VisitVectorType(const VectorType* T) { | |||
5571 | return Visit(T->getElementType()); | |||
5572 | } | |||
5573 | ||||
5574 | bool UnnamedLocalNoLinkageFinder::VisitDependentVectorType( | |||
5575 | const DependentVectorType *T) { | |||
5576 | return Visit(T->getElementType()); | |||
5577 | } | |||
5578 | ||||
5579 | bool UnnamedLocalNoLinkageFinder::VisitExtVectorType(const ExtVectorType* T) { | |||
5580 | return Visit(T->getElementType()); | |||
5581 | } | |||
5582 | ||||
5583 | bool UnnamedLocalNoLinkageFinder::VisitFunctionProtoType( | |||
5584 | const FunctionProtoType* T) { | |||
5585 | for (const auto &A : T->param_types()) { | |||
5586 | if (Visit(A)) | |||
5587 | return true; | |||
5588 | } | |||
5589 | ||||
5590 | return Visit(T->getReturnType()); | |||
5591 | } | |||
5592 | ||||
5593 | bool UnnamedLocalNoLinkageFinder::VisitFunctionNoProtoType( | |||
5594 | const FunctionNoProtoType* T) { | |||
5595 | return Visit(T->getReturnType()); | |||
5596 | } | |||
5597 | ||||
5598 | bool UnnamedLocalNoLinkageFinder::VisitUnresolvedUsingType( | |||
5599 | const UnresolvedUsingType*) { | |||
5600 | return false; | |||
5601 | } | |||
5602 | ||||
5603 | bool UnnamedLocalNoLinkageFinder::VisitTypeOfExprType(const TypeOfExprType*) { | |||
5604 | return false; | |||
5605 | } | |||
5606 | ||||
5607 | bool UnnamedLocalNoLinkageFinder::VisitTypeOfType(const TypeOfType* T) { | |||
5608 | return Visit(T->getUnderlyingType()); | |||
5609 | } | |||
5610 | ||||
5611 | bool UnnamedLocalNoLinkageFinder::VisitDecltypeType(const DecltypeType*) { | |||
5612 | return false; | |||
5613 | } | |||
5614 | ||||
5615 | bool UnnamedLocalNoLinkageFinder::VisitUnaryTransformType( | |||
5616 | const UnaryTransformType*) { | |||
5617 | return false; | |||
5618 | } | |||
5619 | ||||
5620 | bool UnnamedLocalNoLinkageFinder::VisitAutoType(const AutoType *T) { | |||
5621 | return Visit(T->getDeducedType()); | |||
5622 | } | |||
5623 | ||||
5624 | bool UnnamedLocalNoLinkageFinder::VisitDeducedTemplateSpecializationType( | |||
5625 | const DeducedTemplateSpecializationType *T) { | |||
5626 | return Visit(T->getDeducedType()); | |||
5627 | } | |||
5628 | ||||
5629 | bool UnnamedLocalNoLinkageFinder::VisitRecordType(const RecordType* T) { | |||
5630 | return VisitTagDecl(T->getDecl()); | |||
5631 | } | |||
5632 | ||||
5633 | bool UnnamedLocalNoLinkageFinder::VisitEnumType(const EnumType* T) { | |||
5634 | return VisitTagDecl(T->getDecl()); | |||
5635 | } | |||
5636 | ||||
5637 | bool UnnamedLocalNoLinkageFinder::VisitTemplateTypeParmType( | |||
5638 | const TemplateTypeParmType*) { | |||
5639 | return false; | |||
5640 | } | |||
5641 | ||||
5642 | bool UnnamedLocalNoLinkageFinder::VisitSubstTemplateTypeParmPackType( | |||
5643 | const SubstTemplateTypeParmPackType *) { | |||
5644 | return false; | |||
5645 | } | |||
5646 | ||||
5647 | bool UnnamedLocalNoLinkageFinder::VisitTemplateSpecializationType( | |||
5648 | const TemplateSpecializationType*) { | |||
5649 | return false; | |||
5650 | } | |||
5651 | ||||
5652 | bool UnnamedLocalNoLinkageFinder::VisitInjectedClassNameType( | |||
5653 | const InjectedClassNameType* T) { | |||
5654 | return VisitTagDecl(T->getDecl()); | |||
5655 | } | |||
5656 | ||||
5657 | bool UnnamedLocalNoLinkageFinder::VisitDependentNameType( | |||
5658 | const DependentNameType* T) { | |||
5659 | return VisitNestedNameSpecifier(T->getQualifier()); | |||
5660 | } | |||
5661 | ||||
5662 | bool UnnamedLocalNoLinkageFinder::VisitDependentTemplateSpecializationType( | |||
5663 | const DependentTemplateSpecializationType* T) { | |||
5664 | return VisitNestedNameSpecifier(T->getQualifier()); | |||
5665 | } | |||
5666 | ||||
5667 | bool UnnamedLocalNoLinkageFinder::VisitPackExpansionType( | |||
5668 | const PackExpansionType* T) { | |||
5669 | return Visit(T->getPattern()); | |||
5670 | } | |||
5671 | ||||
5672 | bool UnnamedLocalNoLinkageFinder::VisitObjCObjectType(const ObjCObjectType *) { | |||
5673 | return false; | |||
5674 | } | |||
5675 | ||||
5676 | bool UnnamedLocalNoLinkageFinder::VisitObjCInterfaceType( | |||
5677 | const ObjCInterfaceType *) { | |||
5678 | return false; | |||
5679 | } | |||
5680 | ||||
5681 | bool UnnamedLocalNoLinkageFinder::VisitObjCObjectPointerType( | |||
5682 | const ObjCObjectPointerType *) { | |||
5683 | return false; | |||
5684 | } | |||
5685 | ||||
5686 | bool UnnamedLocalNoLinkageFinder::VisitAtomicType(const AtomicType* T) { | |||
5687 | return Visit(T->getValueType()); | |||
5688 | } | |||
5689 | ||||
5690 | bool UnnamedLocalNoLinkageFinder::VisitPipeType(const PipeType* T) { | |||
5691 | return false; | |||
5692 | } | |||
5693 | ||||
5694 | bool UnnamedLocalNoLinkageFinder::VisitTagDecl(const TagDecl *Tag) { | |||
5695 | if (Tag->getDeclContext()->isFunctionOrMethod()) { | |||
5696 | S.Diag(SR.getBegin(), | |||
5697 | S.getLangOpts().CPlusPlus11 ? | |||
5698 | diag::warn_cxx98_compat_template_arg_local_type : | |||
5699 | diag::ext_template_arg_local_type) | |||
5700 | << S.Context.getTypeDeclType(Tag) << SR; | |||
5701 | return true; | |||
5702 | } | |||
5703 | ||||
5704 | if (!Tag->hasNameForLinkage()) { | |||
5705 | S.Diag(SR.getBegin(), | |||
5706 | S.getLangOpts().CPlusPlus11 ? | |||
5707 | diag::warn_cxx98_compat_template_arg_unnamed_type : | |||
5708 | diag::ext_template_arg_unnamed_type) << SR; | |||
5709 | S.Diag(Tag->getLocation(), diag::note_template_unnamed_type_here); | |||
5710 | return true; | |||
5711 | } | |||
5712 | ||||
5713 | return false; | |||
5714 | } | |||
5715 | ||||
5716 | bool UnnamedLocalNoLinkageFinder::VisitNestedNameSpecifier( | |||
5717 | NestedNameSpecifier *NNS) { | |||
5718 | if (NNS->getPrefix() && VisitNestedNameSpecifier(NNS->getPrefix())) | |||
5719 | return true; | |||
5720 | ||||
5721 | switch (NNS->getKind()) { | |||
5722 | case NestedNameSpecifier::Identifier: | |||
5723 | case NestedNameSpecifier::Namespace: | |||
5724 | case NestedNameSpecifier::NamespaceAlias: | |||
5725 | case NestedNameSpecifier::Global: | |||
5726 | case NestedNameSpecifier::Super: | |||
5727 | return false; | |||
5728 | ||||
5729 | case NestedNameSpecifier::TypeSpec: | |||
5730 | case NestedNameSpecifier::TypeSpecWithTemplate: | |||
5731 | return Visit(QualType(NNS->getAsType(), 0)); | |||
5732 | } | |||
5733 | llvm_unreachable("Invalid NestedNameSpecifier::Kind!")::llvm::llvm_unreachable_internal("Invalid NestedNameSpecifier::Kind!" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 5733); | |||
5734 | } | |||
5735 | ||||
5736 | /// Check a template argument against its corresponding | |||
5737 | /// template type parameter. | |||
5738 | /// | |||
5739 | /// This routine implements the semantics of C++ [temp.arg.type]. It | |||
5740 | /// returns true if an error occurred, and false otherwise. | |||
5741 | bool Sema::CheckTemplateArgument(TemplateTypeParmDecl *Param, | |||
5742 | TypeSourceInfo *ArgInfo) { | |||
5743 | assert(ArgInfo && "invalid TypeSourceInfo")((ArgInfo && "invalid TypeSourceInfo") ? static_cast< void> (0) : __assert_fail ("ArgInfo && \"invalid TypeSourceInfo\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 5743, __PRETTY_FUNCTION__)); | |||
5744 | QualType Arg = ArgInfo->getType(); | |||
5745 | SourceRange SR = ArgInfo->getTypeLoc().getSourceRange(); | |||
5746 | ||||
5747 | if (Arg->isVariablyModifiedType()) { | |||
5748 | return Diag(SR.getBegin(), diag::err_variably_modified_template_arg) << Arg; | |||
5749 | } else if (Context.hasSameUnqualifiedType(Arg, Context.OverloadTy)) { | |||
5750 | return Diag(SR.getBegin(), diag::err_template_arg_overload_type) << SR; | |||
5751 | } | |||
5752 | ||||
5753 | // C++03 [temp.arg.type]p2: | |||
5754 | // A local type, a type with no linkage, an unnamed type or a type | |||
5755 | // compounded from any of these types shall not be used as a | |||
5756 | // template-argument for a template type-parameter. | |||
5757 | // | |||
5758 | // C++11 allows these, and even in C++03 we allow them as an extension with | |||
5759 | // a warning. | |||
5760 | if (LangOpts.CPlusPlus11 || Arg->hasUnnamedOrLocalType()) { | |||
5761 | UnnamedLocalNoLinkageFinder Finder(*this, SR); | |||
5762 | (void)Finder.Visit(Context.getCanonicalType(Arg)); | |||
5763 | } | |||
5764 | ||||
5765 | return false; | |||
5766 | } | |||
5767 | ||||
5768 | enum NullPointerValueKind { | |||
5769 | NPV_NotNullPointer, | |||
5770 | NPV_NullPointer, | |||
5771 | NPV_Error | |||
5772 | }; | |||
5773 | ||||
5774 | /// Determine whether the given template argument is a null pointer | |||
5775 | /// value of the appropriate type. | |||
5776 | static NullPointerValueKind | |||
5777 | isNullPointerValueTemplateArgument(Sema &S, NonTypeTemplateParmDecl *Param, | |||
5778 | QualType ParamType, Expr *Arg, | |||
5779 | Decl *Entity = nullptr) { | |||
5780 | if (Arg->isValueDependent() || Arg->isTypeDependent()) | |||
5781 | return NPV_NotNullPointer; | |||
5782 | ||||
5783 | // dllimport'd entities aren't constant but are available inside of template | |||
5784 | // arguments. | |||
5785 | if (Entity && Entity->hasAttr<DLLImportAttr>()) | |||
5786 | return NPV_NotNullPointer; | |||
5787 | ||||
5788 | if (!S.isCompleteType(Arg->getExprLoc(), ParamType)) | |||
5789 | llvm_unreachable(::llvm::llvm_unreachable_internal("Incomplete parameter type in isNullPointerValueTemplateArgument!" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 5790) | |||
5790 | "Incomplete parameter type in isNullPointerValueTemplateArgument!")::llvm::llvm_unreachable_internal("Incomplete parameter type in isNullPointerValueTemplateArgument!" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 5790); | |||
5791 | ||||
5792 | if (!S.getLangOpts().CPlusPlus11) | |||
5793 | return NPV_NotNullPointer; | |||
5794 | ||||
5795 | // Determine whether we have a constant expression. | |||
5796 | ExprResult ArgRV = S.DefaultFunctionArrayConversion(Arg); | |||
5797 | if (ArgRV.isInvalid()) | |||
5798 | return NPV_Error; | |||
5799 | Arg = ArgRV.get(); | |||
5800 | ||||
5801 | Expr::EvalResult EvalResult; | |||
5802 | SmallVector<PartialDiagnosticAt, 8> Notes; | |||
5803 | EvalResult.Diag = &Notes; | |||
5804 | if (!Arg->EvaluateAsRValue(EvalResult, S.Context) || | |||
5805 | EvalResult.HasSideEffects) { | |||
5806 | SourceLocation DiagLoc = Arg->getExprLoc(); | |||
5807 | ||||
5808 | // If our only note is the usual "invalid subexpression" note, just point | |||
5809 | // the caret at its location rather than producing an essentially | |||
5810 | // redundant note. | |||
5811 | if (Notes.size() == 1 && Notes[0].second.getDiagID() == | |||
5812 | diag::note_invalid_subexpr_in_const_expr) { | |||
5813 | DiagLoc = Notes[0].first; | |||
5814 | Notes.clear(); | |||
5815 | } | |||
5816 | ||||
5817 | S.Diag(DiagLoc, diag::err_template_arg_not_address_constant) | |||
5818 | << Arg->getType() << Arg->getSourceRange(); | |||
5819 | for (unsigned I = 0, N = Notes.size(); I != N; ++I) | |||
5820 | S.Diag(Notes[I].first, Notes[I].second); | |||
5821 | ||||
5822 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
5823 | return NPV_Error; | |||
5824 | } | |||
5825 | ||||
5826 | // C++11 [temp.arg.nontype]p1: | |||
5827 | // - an address constant expression of type std::nullptr_t | |||
5828 | if (Arg->getType()->isNullPtrType()) | |||
5829 | return NPV_NullPointer; | |||
5830 | ||||
5831 | // - a constant expression that evaluates to a null pointer value (4.10); or | |||
5832 | // - a constant expression that evaluates to a null member pointer value | |||
5833 | // (4.11); or | |||
5834 | if ((EvalResult.Val.isLValue() && !EvalResult.Val.getLValueBase()) || | |||
5835 | (EvalResult.Val.isMemberPointer() && | |||
5836 | !EvalResult.Val.getMemberPointerDecl())) { | |||
5837 | // If our expression has an appropriate type, we've succeeded. | |||
5838 | bool ObjCLifetimeConversion; | |||
5839 | if (S.Context.hasSameUnqualifiedType(Arg->getType(), ParamType) || | |||
5840 | S.IsQualificationConversion(Arg->getType(), ParamType, false, | |||
5841 | ObjCLifetimeConversion)) | |||
5842 | return NPV_NullPointer; | |||
5843 | ||||
5844 | // The types didn't match, but we know we got a null pointer; complain, | |||
5845 | // then recover as if the types were correct. | |||
5846 | S.Diag(Arg->getExprLoc(), diag::err_template_arg_wrongtype_null_constant) | |||
5847 | << Arg->getType() << ParamType << Arg->getSourceRange(); | |||
5848 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
5849 | return NPV_NullPointer; | |||
5850 | } | |||
5851 | ||||
5852 | // If we don't have a null pointer value, but we do have a NULL pointer | |||
5853 | // constant, suggest a cast to the appropriate type. | |||
5854 | if (Arg->isNullPointerConstant(S.Context, Expr::NPC_NeverValueDependent)) { | |||
5855 | std::string Code = "static_cast<" + ParamType.getAsString() + ">("; | |||
5856 | S.Diag(Arg->getExprLoc(), diag::err_template_arg_untyped_null_constant) | |||
5857 | << ParamType << FixItHint::CreateInsertion(Arg->getBeginLoc(), Code) | |||
5858 | << FixItHint::CreateInsertion(S.getLocForEndOfToken(Arg->getEndLoc()), | |||
5859 | ")"); | |||
5860 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
5861 | return NPV_NullPointer; | |||
5862 | } | |||
5863 | ||||
5864 | // FIXME: If we ever want to support general, address-constant expressions | |||
5865 | // as non-type template arguments, we should return the ExprResult here to | |||
5866 | // be interpreted by the caller. | |||
5867 | return NPV_NotNullPointer; | |||
5868 | } | |||
5869 | ||||
5870 | /// Checks whether the given template argument is compatible with its | |||
5871 | /// template parameter. | |||
5872 | static bool CheckTemplateArgumentIsCompatibleWithParameter( | |||
5873 | Sema &S, NonTypeTemplateParmDecl *Param, QualType ParamType, Expr *ArgIn, | |||
5874 | Expr *Arg, QualType ArgType) { | |||
5875 | bool ObjCLifetimeConversion; | |||
5876 | if (ParamType->isPointerType() && | |||
5877 | !ParamType->getAs<PointerType>()->getPointeeType()->isFunctionType() && | |||
5878 | S.IsQualificationConversion(ArgType, ParamType, false, | |||
5879 | ObjCLifetimeConversion)) { | |||
5880 | // For pointer-to-object types, qualification conversions are | |||
5881 | // permitted. | |||
5882 | } else { | |||
5883 | if (const ReferenceType *ParamRef = ParamType->getAs<ReferenceType>()) { | |||
5884 | if (!ParamRef->getPointeeType()->isFunctionType()) { | |||
5885 | // C++ [temp.arg.nontype]p5b3: | |||
5886 | // For a non-type template-parameter of type reference to | |||
5887 | // object, no conversions apply. The type referred to by the | |||
5888 | // reference may be more cv-qualified than the (otherwise | |||
5889 | // identical) type of the template- argument. The | |||
5890 | // template-parameter is bound directly to the | |||
5891 | // template-argument, which shall be an lvalue. | |||
5892 | ||||
5893 | // FIXME: Other qualifiers? | |||
5894 | unsigned ParamQuals = ParamRef->getPointeeType().getCVRQualifiers(); | |||
5895 | unsigned ArgQuals = ArgType.getCVRQualifiers(); | |||
5896 | ||||
5897 | if ((ParamQuals | ArgQuals) != ParamQuals) { | |||
5898 | S.Diag(Arg->getBeginLoc(), | |||
5899 | diag::err_template_arg_ref_bind_ignores_quals) | |||
5900 | << ParamType << Arg->getType() << Arg->getSourceRange(); | |||
5901 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
5902 | return true; | |||
5903 | } | |||
5904 | } | |||
5905 | } | |||
5906 | ||||
5907 | // At this point, the template argument refers to an object or | |||
5908 | // function with external linkage. We now need to check whether the | |||
5909 | // argument and parameter types are compatible. | |||
5910 | if (!S.Context.hasSameUnqualifiedType(ArgType, | |||
5911 | ParamType.getNonReferenceType())) { | |||
5912 | // We can't perform this conversion or binding. | |||
5913 | if (ParamType->isReferenceType()) | |||
5914 | S.Diag(Arg->getBeginLoc(), diag::err_template_arg_no_ref_bind) | |||
5915 | << ParamType << ArgIn->getType() << Arg->getSourceRange(); | |||
5916 | else | |||
5917 | S.Diag(Arg->getBeginLoc(), diag::err_template_arg_not_convertible) | |||
5918 | << ArgIn->getType() << ParamType << Arg->getSourceRange(); | |||
5919 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
5920 | return true; | |||
5921 | } | |||
5922 | } | |||
5923 | ||||
5924 | return false; | |||
5925 | } | |||
5926 | ||||
5927 | /// Checks whether the given template argument is the address | |||
5928 | /// of an object or function according to C++ [temp.arg.nontype]p1. | |||
5929 | static bool | |||
5930 | CheckTemplateArgumentAddressOfObjectOrFunction(Sema &S, | |||
5931 | NonTypeTemplateParmDecl *Param, | |||
5932 | QualType ParamType, | |||
5933 | Expr *ArgIn, | |||
5934 | TemplateArgument &Converted) { | |||
5935 | bool Invalid = false; | |||
5936 | Expr *Arg = ArgIn; | |||
5937 | QualType ArgType = Arg->getType(); | |||
5938 | ||||
5939 | bool AddressTaken = false; | |||
5940 | SourceLocation AddrOpLoc; | |||
5941 | if (S.getLangOpts().MicrosoftExt) { | |||
5942 | // Microsoft Visual C++ strips all casts, allows an arbitrary number of | |||
5943 | // dereference and address-of operators. | |||
5944 | Arg = Arg->IgnoreParenCasts(); | |||
5945 | ||||
5946 | bool ExtWarnMSTemplateArg = false; | |||
5947 | UnaryOperatorKind FirstOpKind; | |||
5948 | SourceLocation FirstOpLoc; | |||
5949 | while (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(Arg)) { | |||
5950 | UnaryOperatorKind UnOpKind = UnOp->getOpcode(); | |||
5951 | if (UnOpKind == UO_Deref) | |||
5952 | ExtWarnMSTemplateArg = true; | |||
5953 | if (UnOpKind == UO_AddrOf || UnOpKind == UO_Deref) { | |||
5954 | Arg = UnOp->getSubExpr()->IgnoreParenCasts(); | |||
5955 | if (!AddrOpLoc.isValid()) { | |||
5956 | FirstOpKind = UnOpKind; | |||
5957 | FirstOpLoc = UnOp->getOperatorLoc(); | |||
5958 | } | |||
5959 | } else | |||
5960 | break; | |||
5961 | } | |||
5962 | if (FirstOpLoc.isValid()) { | |||
5963 | if (ExtWarnMSTemplateArg) | |||
5964 | S.Diag(ArgIn->getBeginLoc(), diag::ext_ms_deref_template_argument) | |||
5965 | << ArgIn->getSourceRange(); | |||
5966 | ||||
5967 | if (FirstOpKind == UO_AddrOf) | |||
5968 | AddressTaken = true; | |||
5969 | else if (Arg->getType()->isPointerType()) { | |||
5970 | // We cannot let pointers get dereferenced here, that is obviously not a | |||
5971 | // constant expression. | |||
5972 | assert(FirstOpKind == UO_Deref)((FirstOpKind == UO_Deref) ? static_cast<void> (0) : __assert_fail ("FirstOpKind == UO_Deref", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 5972, __PRETTY_FUNCTION__)); | |||
5973 | S.Diag(Arg->getBeginLoc(), diag::err_template_arg_not_decl_ref) | |||
5974 | << Arg->getSourceRange(); | |||
5975 | } | |||
5976 | } | |||
5977 | } else { | |||
5978 | // See through any implicit casts we added to fix the type. | |||
5979 | Arg = Arg->IgnoreImpCasts(); | |||
5980 | ||||
5981 | // C++ [temp.arg.nontype]p1: | |||
5982 | // | |||
5983 | // A template-argument for a non-type, non-template | |||
5984 | // template-parameter shall be one of: [...] | |||
5985 | // | |||
5986 | // -- the address of an object or function with external | |||
5987 | // linkage, including function templates and function | |||
5988 | // template-ids but excluding non-static class members, | |||
5989 | // expressed as & id-expression where the & is optional if | |||
5990 | // the name refers to a function or array, or if the | |||
5991 | // corresponding template-parameter is a reference; or | |||
5992 | ||||
5993 | // In C++98/03 mode, give an extension warning on any extra parentheses. | |||
5994 | // See http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#773 | |||
5995 | bool ExtraParens = false; | |||
5996 | while (ParenExpr *Parens = dyn_cast<ParenExpr>(Arg)) { | |||
5997 | if (!Invalid && !ExtraParens) { | |||
5998 | S.Diag(Arg->getBeginLoc(), | |||
5999 | S.getLangOpts().CPlusPlus11 | |||
6000 | ? diag::warn_cxx98_compat_template_arg_extra_parens | |||
6001 | : diag::ext_template_arg_extra_parens) | |||
6002 | << Arg->getSourceRange(); | |||
6003 | ExtraParens = true; | |||
6004 | } | |||
6005 | ||||
6006 | Arg = Parens->getSubExpr(); | |||
6007 | } | |||
6008 | ||||
6009 | while (SubstNonTypeTemplateParmExpr *subst = | |||
6010 | dyn_cast<SubstNonTypeTemplateParmExpr>(Arg)) | |||
6011 | Arg = subst->getReplacement()->IgnoreImpCasts(); | |||
6012 | ||||
6013 | if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(Arg)) { | |||
6014 | if (UnOp->getOpcode() == UO_AddrOf) { | |||
6015 | Arg = UnOp->getSubExpr(); | |||
6016 | AddressTaken = true; | |||
6017 | AddrOpLoc = UnOp->getOperatorLoc(); | |||
6018 | } | |||
6019 | } | |||
6020 | ||||
6021 | while (SubstNonTypeTemplateParmExpr *subst = | |||
6022 | dyn_cast<SubstNonTypeTemplateParmExpr>(Arg)) | |||
6023 | Arg = subst->getReplacement()->IgnoreImpCasts(); | |||
6024 | } | |||
6025 | ||||
6026 | DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Arg); | |||
6027 | ValueDecl *Entity = DRE ? DRE->getDecl() : nullptr; | |||
6028 | ||||
6029 | // If our parameter has pointer type, check for a null template value. | |||
6030 | if (ParamType->isPointerType() || ParamType->isNullPtrType()) { | |||
6031 | switch (isNullPointerValueTemplateArgument(S, Param, ParamType, ArgIn, | |||
6032 | Entity)) { | |||
6033 | case NPV_NullPointer: | |||
6034 | S.Diag(Arg->getExprLoc(), diag::warn_cxx98_compat_template_arg_null); | |||
6035 | Converted = TemplateArgument(S.Context.getCanonicalType(ParamType), | |||
6036 | /*isNullPtr=*/true); | |||
6037 | return false; | |||
6038 | ||||
6039 | case NPV_Error: | |||
6040 | return true; | |||
6041 | ||||
6042 | case NPV_NotNullPointer: | |||
6043 | break; | |||
6044 | } | |||
6045 | } | |||
6046 | ||||
6047 | // Stop checking the precise nature of the argument if it is value dependent, | |||
6048 | // it should be checked when instantiated. | |||
6049 | if (Arg->isValueDependent()) { | |||
6050 | Converted = TemplateArgument(ArgIn); | |||
6051 | return false; | |||
6052 | } | |||
6053 | ||||
6054 | if (isa<CXXUuidofExpr>(Arg)) { | |||
6055 | if (CheckTemplateArgumentIsCompatibleWithParameter(S, Param, ParamType, | |||
6056 | ArgIn, Arg, ArgType)) | |||
6057 | return true; | |||
6058 | ||||
6059 | Converted = TemplateArgument(ArgIn); | |||
6060 | return false; | |||
6061 | } | |||
6062 | ||||
6063 | if (!DRE) { | |||
6064 | S.Diag(Arg->getBeginLoc(), diag::err_template_arg_not_decl_ref) | |||
6065 | << Arg->getSourceRange(); | |||
6066 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
6067 | return true; | |||
6068 | } | |||
6069 | ||||
6070 | // Cannot refer to non-static data members | |||
6071 | if (isa<FieldDecl>(Entity) || isa<IndirectFieldDecl>(Entity)) { | |||
6072 | S.Diag(Arg->getBeginLoc(), diag::err_template_arg_field) | |||
6073 | << Entity << Arg->getSourceRange(); | |||
6074 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
6075 | return true; | |||
6076 | } | |||
6077 | ||||
6078 | // Cannot refer to non-static member functions | |||
6079 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(Entity)) { | |||
6080 | if (!Method->isStatic()) { | |||
6081 | S.Diag(Arg->getBeginLoc(), diag::err_template_arg_method) | |||
6082 | << Method << Arg->getSourceRange(); | |||
6083 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
6084 | return true; | |||
6085 | } | |||
6086 | } | |||
6087 | ||||
6088 | FunctionDecl *Func = dyn_cast<FunctionDecl>(Entity); | |||
6089 | VarDecl *Var = dyn_cast<VarDecl>(Entity); | |||
6090 | ||||
6091 | // A non-type template argument must refer to an object or function. | |||
6092 | if (!Func && !Var) { | |||
6093 | // We found something, but we don't know specifically what it is. | |||
6094 | S.Diag(Arg->getBeginLoc(), diag::err_template_arg_not_object_or_func) | |||
6095 | << Arg->getSourceRange(); | |||
6096 | S.Diag(DRE->getDecl()->getLocation(), diag::note_template_arg_refers_here); | |||
6097 | return true; | |||
6098 | } | |||
6099 | ||||
6100 | // Address / reference template args must have external linkage in C++98. | |||
6101 | if (Entity->getFormalLinkage() == InternalLinkage) { | |||
6102 | S.Diag(Arg->getBeginLoc(), | |||
6103 | S.getLangOpts().CPlusPlus11 | |||
6104 | ? diag::warn_cxx98_compat_template_arg_object_internal | |||
6105 | : diag::ext_template_arg_object_internal) | |||
6106 | << !Func << Entity << Arg->getSourceRange(); | |||
6107 | S.Diag(Entity->getLocation(), diag::note_template_arg_internal_object) | |||
6108 | << !Func; | |||
6109 | } else if (!Entity->hasLinkage()) { | |||
6110 | S.Diag(Arg->getBeginLoc(), diag::err_template_arg_object_no_linkage) | |||
6111 | << !Func << Entity << Arg->getSourceRange(); | |||
6112 | S.Diag(Entity->getLocation(), diag::note_template_arg_internal_object) | |||
6113 | << !Func; | |||
6114 | return true; | |||
6115 | } | |||
6116 | ||||
6117 | if (Func) { | |||
6118 | // If the template parameter has pointer type, the function decays. | |||
6119 | if (ParamType->isPointerType() && !AddressTaken) | |||
6120 | ArgType = S.Context.getPointerType(Func->getType()); | |||
6121 | else if (AddressTaken && ParamType->isReferenceType()) { | |||
6122 | // If we originally had an address-of operator, but the | |||
6123 | // parameter has reference type, complain and (if things look | |||
6124 | // like they will work) drop the address-of operator. | |||
6125 | if (!S.Context.hasSameUnqualifiedType(Func->getType(), | |||
6126 | ParamType.getNonReferenceType())) { | |||
6127 | S.Diag(AddrOpLoc, diag::err_template_arg_address_of_non_pointer) | |||
6128 | << ParamType; | |||
6129 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
6130 | return true; | |||
6131 | } | |||
6132 | ||||
6133 | S.Diag(AddrOpLoc, diag::err_template_arg_address_of_non_pointer) | |||
6134 | << ParamType | |||
6135 | << FixItHint::CreateRemoval(AddrOpLoc); | |||
6136 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
6137 | ||||
6138 | ArgType = Func->getType(); | |||
6139 | } | |||
6140 | } else { | |||
6141 | // A value of reference type is not an object. | |||
6142 | if (Var->getType()->isReferenceType()) { | |||
6143 | S.Diag(Arg->getBeginLoc(), diag::err_template_arg_reference_var) | |||
6144 | << Var->getType() << Arg->getSourceRange(); | |||
6145 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
6146 | return true; | |||
6147 | } | |||
6148 | ||||
6149 | // A template argument must have static storage duration. | |||
6150 | if (Var->getTLSKind()) { | |||
6151 | S.Diag(Arg->getBeginLoc(), diag::err_template_arg_thread_local) | |||
6152 | << Arg->getSourceRange(); | |||
6153 | S.Diag(Var->getLocation(), diag::note_template_arg_refers_here); | |||
6154 | return true; | |||
6155 | } | |||
6156 | ||||
6157 | // If the template parameter has pointer type, we must have taken | |||
6158 | // the address of this object. | |||
6159 | if (ParamType->isReferenceType()) { | |||
6160 | if (AddressTaken) { | |||
6161 | // If we originally had an address-of operator, but the | |||
6162 | // parameter has reference type, complain and (if things look | |||
6163 | // like they will work) drop the address-of operator. | |||
6164 | if (!S.Context.hasSameUnqualifiedType(Var->getType(), | |||
6165 | ParamType.getNonReferenceType())) { | |||
6166 | S.Diag(AddrOpLoc, diag::err_template_arg_address_of_non_pointer) | |||
6167 | << ParamType; | |||
6168 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
6169 | return true; | |||
6170 | } | |||
6171 | ||||
6172 | S.Diag(AddrOpLoc, diag::err_template_arg_address_of_non_pointer) | |||
6173 | << ParamType | |||
6174 | << FixItHint::CreateRemoval(AddrOpLoc); | |||
6175 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
6176 | ||||
6177 | ArgType = Var->getType(); | |||
6178 | } | |||
6179 | } else if (!AddressTaken && ParamType->isPointerType()) { | |||
6180 | if (Var->getType()->isArrayType()) { | |||
6181 | // Array-to-pointer decay. | |||
6182 | ArgType = S.Context.getArrayDecayedType(Var->getType()); | |||
6183 | } else { | |||
6184 | // If the template parameter has pointer type but the address of | |||
6185 | // this object was not taken, complain and (possibly) recover by | |||
6186 | // taking the address of the entity. | |||
6187 | ArgType = S.Context.getPointerType(Var->getType()); | |||
6188 | if (!S.Context.hasSameUnqualifiedType(ArgType, ParamType)) { | |||
6189 | S.Diag(Arg->getBeginLoc(), diag::err_template_arg_not_address_of) | |||
6190 | << ParamType; | |||
6191 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
6192 | return true; | |||
6193 | } | |||
6194 | ||||
6195 | S.Diag(Arg->getBeginLoc(), diag::err_template_arg_not_address_of) | |||
6196 | << ParamType << FixItHint::CreateInsertion(Arg->getBeginLoc(), "&"); | |||
6197 | ||||
6198 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
6199 | } | |||
6200 | } | |||
6201 | } | |||
6202 | ||||
6203 | if (CheckTemplateArgumentIsCompatibleWithParameter(S, Param, ParamType, ArgIn, | |||
6204 | Arg, ArgType)) | |||
6205 | return true; | |||
6206 | ||||
6207 | // Create the template argument. | |||
6208 | Converted = | |||
6209 | TemplateArgument(cast<ValueDecl>(Entity->getCanonicalDecl()), ParamType); | |||
6210 | S.MarkAnyDeclReferenced(Arg->getBeginLoc(), Entity, false); | |||
6211 | return false; | |||
6212 | } | |||
6213 | ||||
6214 | /// Checks whether the given template argument is a pointer to | |||
6215 | /// member constant according to C++ [temp.arg.nontype]p1. | |||
6216 | static bool CheckTemplateArgumentPointerToMember(Sema &S, | |||
6217 | NonTypeTemplateParmDecl *Param, | |||
6218 | QualType ParamType, | |||
6219 | Expr *&ResultArg, | |||
6220 | TemplateArgument &Converted) { | |||
6221 | bool Invalid = false; | |||
6222 | ||||
6223 | Expr *Arg = ResultArg; | |||
6224 | bool ObjCLifetimeConversion; | |||
6225 | ||||
6226 | // C++ [temp.arg.nontype]p1: | |||
6227 | // | |||
6228 | // A template-argument for a non-type, non-template | |||
6229 | // template-parameter shall be one of: [...] | |||
6230 | // | |||
6231 | // -- a pointer to member expressed as described in 5.3.1. | |||
6232 | DeclRefExpr *DRE = nullptr; | |||
6233 | ||||
6234 | // In C++98/03 mode, give an extension warning on any extra parentheses. | |||
6235 | // See http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#773 | |||
6236 | bool ExtraParens = false; | |||
6237 | while (ParenExpr *Parens = dyn_cast<ParenExpr>(Arg)) { | |||
6238 | if (!Invalid && !ExtraParens) { | |||
6239 | S.Diag(Arg->getBeginLoc(), | |||
6240 | S.getLangOpts().CPlusPlus11 | |||
6241 | ? diag::warn_cxx98_compat_template_arg_extra_parens | |||
6242 | : diag::ext_template_arg_extra_parens) | |||
6243 | << Arg->getSourceRange(); | |||
6244 | ExtraParens = true; | |||
6245 | } | |||
6246 | ||||
6247 | Arg = Parens->getSubExpr(); | |||
6248 | } | |||
6249 | ||||
6250 | while (SubstNonTypeTemplateParmExpr *subst = | |||
6251 | dyn_cast<SubstNonTypeTemplateParmExpr>(Arg)) | |||
6252 | Arg = subst->getReplacement()->IgnoreImpCasts(); | |||
6253 | ||||
6254 | // A pointer-to-member constant written &Class::member. | |||
6255 | if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(Arg)) { | |||
6256 | if (UnOp->getOpcode() == UO_AddrOf) { | |||
6257 | DRE = dyn_cast<DeclRefExpr>(UnOp->getSubExpr()); | |||
6258 | if (DRE && !DRE->getQualifier()) | |||
6259 | DRE = nullptr; | |||
6260 | } | |||
6261 | } | |||
6262 | // A constant of pointer-to-member type. | |||
6263 | else if ((DRE = dyn_cast<DeclRefExpr>(Arg))) { | |||
6264 | ValueDecl *VD = DRE->getDecl(); | |||
6265 | if (VD->getType()->isMemberPointerType()) { | |||
6266 | if (isa<NonTypeTemplateParmDecl>(VD)) { | |||
6267 | if (Arg->isTypeDependent() || Arg->isValueDependent()) { | |||
6268 | Converted = TemplateArgument(Arg); | |||
6269 | } else { | |||
6270 | VD = cast<ValueDecl>(VD->getCanonicalDecl()); | |||
6271 | Converted = TemplateArgument(VD, ParamType); | |||
6272 | } | |||
6273 | return Invalid; | |||
6274 | } | |||
6275 | } | |||
6276 | ||||
6277 | DRE = nullptr; | |||
6278 | } | |||
6279 | ||||
6280 | ValueDecl *Entity = DRE ? DRE->getDecl() : nullptr; | |||
6281 | ||||
6282 | // Check for a null pointer value. | |||
6283 | switch (isNullPointerValueTemplateArgument(S, Param, ParamType, ResultArg, | |||
6284 | Entity)) { | |||
6285 | case NPV_Error: | |||
6286 | return true; | |||
6287 | case NPV_NullPointer: | |||
6288 | S.Diag(ResultArg->getExprLoc(), diag::warn_cxx98_compat_template_arg_null); | |||
6289 | Converted = TemplateArgument(S.Context.getCanonicalType(ParamType), | |||
6290 | /*isNullPtr*/true); | |||
6291 | return false; | |||
6292 | case NPV_NotNullPointer: | |||
6293 | break; | |||
6294 | } | |||
6295 | ||||
6296 | if (S.IsQualificationConversion(ResultArg->getType(), | |||
6297 | ParamType.getNonReferenceType(), false, | |||
6298 | ObjCLifetimeConversion)) { | |||
6299 | ResultArg = S.ImpCastExprToType(ResultArg, ParamType, CK_NoOp, | |||
6300 | ResultArg->getValueKind()) | |||
6301 | .get(); | |||
6302 | } else if (!S.Context.hasSameUnqualifiedType( | |||
6303 | ResultArg->getType(), ParamType.getNonReferenceType())) { | |||
6304 | // We can't perform this conversion. | |||
6305 | S.Diag(ResultArg->getBeginLoc(), diag::err_template_arg_not_convertible) | |||
6306 | << ResultArg->getType() << ParamType << ResultArg->getSourceRange(); | |||
6307 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
6308 | return true; | |||
6309 | } | |||
6310 | ||||
6311 | if (!DRE) | |||
6312 | return S.Diag(Arg->getBeginLoc(), | |||
6313 | diag::err_template_arg_not_pointer_to_member_form) | |||
6314 | << Arg->getSourceRange(); | |||
6315 | ||||
6316 | if (isa<FieldDecl>(DRE->getDecl()) || | |||
6317 | isa<IndirectFieldDecl>(DRE->getDecl()) || | |||
6318 | isa<CXXMethodDecl>(DRE->getDecl())) { | |||
6319 | assert((isa<FieldDecl>(DRE->getDecl()) ||(((isa<FieldDecl>(DRE->getDecl()) || isa<IndirectFieldDecl >(DRE->getDecl()) || !cast<CXXMethodDecl>(DRE-> getDecl())->isStatic()) && "Only non-static member pointers can make it here" ) ? static_cast<void> (0) : __assert_fail ("(isa<FieldDecl>(DRE->getDecl()) || isa<IndirectFieldDecl>(DRE->getDecl()) || !cast<CXXMethodDecl>(DRE->getDecl())->isStatic()) && \"Only non-static member pointers can make it here\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6322, __PRETTY_FUNCTION__)) | |||
6320 | isa<IndirectFieldDecl>(DRE->getDecl()) ||(((isa<FieldDecl>(DRE->getDecl()) || isa<IndirectFieldDecl >(DRE->getDecl()) || !cast<CXXMethodDecl>(DRE-> getDecl())->isStatic()) && "Only non-static member pointers can make it here" ) ? static_cast<void> (0) : __assert_fail ("(isa<FieldDecl>(DRE->getDecl()) || isa<IndirectFieldDecl>(DRE->getDecl()) || !cast<CXXMethodDecl>(DRE->getDecl())->isStatic()) && \"Only non-static member pointers can make it here\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6322, __PRETTY_FUNCTION__)) | |||
6321 | !cast<CXXMethodDecl>(DRE->getDecl())->isStatic()) &&(((isa<FieldDecl>(DRE->getDecl()) || isa<IndirectFieldDecl >(DRE->getDecl()) || !cast<CXXMethodDecl>(DRE-> getDecl())->isStatic()) && "Only non-static member pointers can make it here" ) ? static_cast<void> (0) : __assert_fail ("(isa<FieldDecl>(DRE->getDecl()) || isa<IndirectFieldDecl>(DRE->getDecl()) || !cast<CXXMethodDecl>(DRE->getDecl())->isStatic()) && \"Only non-static member pointers can make it here\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6322, __PRETTY_FUNCTION__)) | |||
6322 | "Only non-static member pointers can make it here")(((isa<FieldDecl>(DRE->getDecl()) || isa<IndirectFieldDecl >(DRE->getDecl()) || !cast<CXXMethodDecl>(DRE-> getDecl())->isStatic()) && "Only non-static member pointers can make it here" ) ? static_cast<void> (0) : __assert_fail ("(isa<FieldDecl>(DRE->getDecl()) || isa<IndirectFieldDecl>(DRE->getDecl()) || !cast<CXXMethodDecl>(DRE->getDecl())->isStatic()) && \"Only non-static member pointers can make it here\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6322, __PRETTY_FUNCTION__)); | |||
6323 | ||||
6324 | // Okay: this is the address of a non-static member, and therefore | |||
6325 | // a member pointer constant. | |||
6326 | if (Arg->isTypeDependent() || Arg->isValueDependent()) { | |||
6327 | Converted = TemplateArgument(Arg); | |||
6328 | } else { | |||
6329 | ValueDecl *D = cast<ValueDecl>(DRE->getDecl()->getCanonicalDecl()); | |||
6330 | Converted = TemplateArgument(D, ParamType); | |||
6331 | } | |||
6332 | return Invalid; | |||
6333 | } | |||
6334 | ||||
6335 | // We found something else, but we don't know specifically what it is. | |||
6336 | S.Diag(Arg->getBeginLoc(), diag::err_template_arg_not_pointer_to_member_form) | |||
6337 | << Arg->getSourceRange(); | |||
6338 | S.Diag(DRE->getDecl()->getLocation(), diag::note_template_arg_refers_here); | |||
6339 | return true; | |||
6340 | } | |||
6341 | ||||
6342 | /// Check a template argument against its corresponding | |||
6343 | /// non-type template parameter. | |||
6344 | /// | |||
6345 | /// This routine implements the semantics of C++ [temp.arg.nontype]. | |||
6346 | /// If an error occurred, it returns ExprError(); otherwise, it | |||
6347 | /// returns the converted template argument. \p ParamType is the | |||
6348 | /// type of the non-type template parameter after it has been instantiated. | |||
6349 | ExprResult Sema::CheckTemplateArgument(NonTypeTemplateParmDecl *Param, | |||
6350 | QualType ParamType, Expr *Arg, | |||
6351 | TemplateArgument &Converted, | |||
6352 | CheckTemplateArgumentKind CTAK) { | |||
6353 | SourceLocation StartLoc = Arg->getBeginLoc(); | |||
6354 | ||||
6355 | // If the parameter type somehow involves auto, deduce the type now. | |||
6356 | if (getLangOpts().CPlusPlus17 && ParamType->isUndeducedType()) { | |||
| ||||
6357 | // During template argument deduction, we allow 'decltype(auto)' to | |||
6358 | // match an arbitrary dependent argument. | |||
6359 | // FIXME: The language rules don't say what happens in this case. | |||
6360 | // FIXME: We get an opaque dependent type out of decltype(auto) if the | |||
6361 | // expression is merely instantiation-dependent; is this enough? | |||
6362 | if (CTAK == CTAK_Deduced && Arg->isTypeDependent()) { | |||
6363 | auto *AT = dyn_cast<AutoType>(ParamType); | |||
6364 | if (AT && AT->isDecltypeAuto()) { | |||
6365 | Converted = TemplateArgument(Arg); | |||
6366 | return Arg; | |||
6367 | } | |||
6368 | } | |||
6369 | ||||
6370 | // When checking a deduced template argument, deduce from its type even if | |||
6371 | // the type is dependent, in order to check the types of non-type template | |||
6372 | // arguments line up properly in partial ordering. | |||
6373 | Optional<unsigned> Depth = Param->getDepth() + 1; | |||
6374 | Expr *DeductionArg = Arg; | |||
6375 | if (auto *PE = dyn_cast<PackExpansionExpr>(DeductionArg)) | |||
6376 | DeductionArg = PE->getPattern(); | |||
6377 | if (DeduceAutoType( | |||
6378 | Context.getTrivialTypeSourceInfo(ParamType, Param->getLocation()), | |||
6379 | DeductionArg, ParamType, Depth) == DAR_Failed) { | |||
6380 | Diag(Arg->getExprLoc(), | |||
6381 | diag::err_non_type_template_parm_type_deduction_failure) | |||
6382 | << Param->getDeclName() << Param->getType() << Arg->getType() | |||
6383 | << Arg->getSourceRange(); | |||
6384 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
6385 | return ExprError(); | |||
6386 | } | |||
6387 | // CheckNonTypeTemplateParameterType will produce a diagnostic if there's | |||
6388 | // an error. The error message normally references the parameter | |||
6389 | // declaration, but here we'll pass the argument location because that's | |||
6390 | // where the parameter type is deduced. | |||
6391 | ParamType = CheckNonTypeTemplateParameterType(ParamType, Arg->getExprLoc()); | |||
6392 | if (ParamType.isNull()) { | |||
6393 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
6394 | return ExprError(); | |||
6395 | } | |||
6396 | } | |||
6397 | ||||
6398 | // We should have already dropped all cv-qualifiers by now. | |||
6399 | assert(!ParamType.hasQualifiers() &&((!ParamType.hasQualifiers() && "non-type template parameter type cannot be qualified" ) ? static_cast<void> (0) : __assert_fail ("!ParamType.hasQualifiers() && \"non-type template parameter type cannot be qualified\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6400, __PRETTY_FUNCTION__)) | |||
6400 | "non-type template parameter type cannot be qualified")((!ParamType.hasQualifiers() && "non-type template parameter type cannot be qualified" ) ? static_cast<void> (0) : __assert_fail ("!ParamType.hasQualifiers() && \"non-type template parameter type cannot be qualified\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6400, __PRETTY_FUNCTION__)); | |||
6401 | ||||
6402 | if (CTAK == CTAK_Deduced && | |||
6403 | !Context.hasSameType(ParamType.getNonLValueExprType(Context), | |||
6404 | Arg->getType())) { | |||
6405 | // FIXME: If either type is dependent, we skip the check. This isn't | |||
6406 | // correct, since during deduction we're supposed to have replaced each | |||
6407 | // template parameter with some unique (non-dependent) placeholder. | |||
6408 | // FIXME: If the argument type contains 'auto', we carry on and fail the | |||
6409 | // type check in order to force specific types to be more specialized than | |||
6410 | // 'auto'. It's not clear how partial ordering with 'auto' is supposed to | |||
6411 | // work. | |||
6412 | if ((ParamType->isDependentType() || Arg->isTypeDependent()) && | |||
6413 | !Arg->getType()->getContainedAutoType()) { | |||
6414 | Converted = TemplateArgument(Arg); | |||
6415 | return Arg; | |||
6416 | } | |||
6417 | // FIXME: This attempts to implement C++ [temp.deduct.type]p17. Per DR1770, | |||
6418 | // we should actually be checking the type of the template argument in P, | |||
6419 | // not the type of the template argument deduced from A, against the | |||
6420 | // template parameter type. | |||
6421 | Diag(StartLoc, diag::err_deduced_non_type_template_arg_type_mismatch) | |||
6422 | << Arg->getType() | |||
6423 | << ParamType.getUnqualifiedType(); | |||
6424 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
6425 | return ExprError(); | |||
6426 | } | |||
6427 | ||||
6428 | // If either the parameter has a dependent type or the argument is | |||
6429 | // type-dependent, there's nothing we can check now. The argument only | |||
6430 | // contains an unexpanded pack during partial ordering, and there's | |||
6431 | // nothing more we can check in that case. | |||
6432 | if (ParamType->isDependentType() || Arg->isTypeDependent() || | |||
6433 | Arg->containsUnexpandedParameterPack()) { | |||
6434 | // Force the argument to the type of the parameter to maintain invariants. | |||
6435 | auto *PE = dyn_cast<PackExpansionExpr>(Arg); | |||
6436 | if (PE) | |||
6437 | Arg = PE->getPattern(); | |||
6438 | ExprResult E = ImpCastExprToType( | |||
6439 | Arg, ParamType.getNonLValueExprType(Context), CK_Dependent, | |||
6440 | ParamType->isLValueReferenceType() ? VK_LValue : | |||
6441 | ParamType->isRValueReferenceType() ? VK_XValue : VK_RValue); | |||
6442 | if (E.isInvalid()) | |||
6443 | return ExprError(); | |||
6444 | if (PE) { | |||
6445 | // Recreate a pack expansion if we unwrapped one. | |||
6446 | E = new (Context) | |||
6447 | PackExpansionExpr(E.get()->getType(), E.get(), PE->getEllipsisLoc(), | |||
6448 | PE->getNumExpansions()); | |||
6449 | } | |||
6450 | Converted = TemplateArgument(E.get()); | |||
6451 | return E; | |||
6452 | } | |||
6453 | ||||
6454 | // The initialization of the parameter from the argument is | |||
6455 | // a constant-evaluated context. | |||
6456 | EnterExpressionEvaluationContext ConstantEvaluated( | |||
6457 | *this, Sema::ExpressionEvaluationContext::ConstantEvaluated); | |||
6458 | ||||
6459 | if (getLangOpts().CPlusPlus17) { | |||
6460 | // C++17 [temp.arg.nontype]p1: | |||
6461 | // A template-argument for a non-type template parameter shall be | |||
6462 | // a converted constant expression of the type of the template-parameter. | |||
6463 | APValue Value; | |||
6464 | ExprResult ArgResult = CheckConvertedConstantExpression( | |||
6465 | Arg, ParamType, Value, CCEK_TemplateArg); | |||
6466 | if (ArgResult.isInvalid()) | |||
6467 | return ExprError(); | |||
6468 | ||||
6469 | // For a value-dependent argument, CheckConvertedConstantExpression is | |||
6470 | // permitted (and expected) to be unable to determine a value. | |||
6471 | if (ArgResult.get()->isValueDependent()) { | |||
6472 | Converted = TemplateArgument(ArgResult.get()); | |||
6473 | return ArgResult; | |||
6474 | } | |||
6475 | ||||
6476 | QualType CanonParamType = Context.getCanonicalType(ParamType); | |||
6477 | ||||
6478 | // Convert the APValue to a TemplateArgument. | |||
6479 | switch (Value.getKind()) { | |||
6480 | case APValue::None: | |||
6481 | assert(ParamType->isNullPtrType())((ParamType->isNullPtrType()) ? static_cast<void> (0 ) : __assert_fail ("ParamType->isNullPtrType()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6481, __PRETTY_FUNCTION__)); | |||
6482 | Converted = TemplateArgument(CanonParamType, /*isNullPtr*/true); | |||
6483 | break; | |||
6484 | case APValue::Indeterminate: | |||
6485 | llvm_unreachable("result of constant evaluation should be initialized")::llvm::llvm_unreachable_internal("result of constant evaluation should be initialized" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6485); | |||
6486 | break; | |||
6487 | case APValue::Int: | |||
6488 | assert(ParamType->isIntegralOrEnumerationType())((ParamType->isIntegralOrEnumerationType()) ? static_cast< void> (0) : __assert_fail ("ParamType->isIntegralOrEnumerationType()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6488, __PRETTY_FUNCTION__)); | |||
6489 | Converted = TemplateArgument(Context, Value.getInt(), CanonParamType); | |||
6490 | break; | |||
6491 | case APValue::MemberPointer: { | |||
6492 | assert(ParamType->isMemberPointerType())((ParamType->isMemberPointerType()) ? static_cast<void> (0) : __assert_fail ("ParamType->isMemberPointerType()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6492, __PRETTY_FUNCTION__)); | |||
6493 | ||||
6494 | // FIXME: We need TemplateArgument representation and mangling for these. | |||
6495 | if (!Value.getMemberPointerPath().empty()) { | |||
6496 | Diag(Arg->getBeginLoc(), | |||
6497 | diag::err_template_arg_member_ptr_base_derived_not_supported) | |||
6498 | << Value.getMemberPointerDecl() << ParamType | |||
6499 | << Arg->getSourceRange(); | |||
6500 | return ExprError(); | |||
6501 | } | |||
6502 | ||||
6503 | auto *VD = const_cast<ValueDecl*>(Value.getMemberPointerDecl()); | |||
6504 | Converted = VD ? TemplateArgument(VD, CanonParamType) | |||
6505 | : TemplateArgument(CanonParamType, /*isNullPtr*/true); | |||
6506 | break; | |||
6507 | } | |||
6508 | case APValue::LValue: { | |||
6509 | // For a non-type template-parameter of pointer or reference type, | |||
6510 | // the value of the constant expression shall not refer to | |||
6511 | assert(ParamType->isPointerType() || ParamType->isReferenceType() ||((ParamType->isPointerType() || ParamType->isReferenceType () || ParamType->isNullPtrType()) ? static_cast<void> (0) : __assert_fail ("ParamType->isPointerType() || ParamType->isReferenceType() || ParamType->isNullPtrType()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6512, __PRETTY_FUNCTION__)) | |||
6512 | ParamType->isNullPtrType())((ParamType->isPointerType() || ParamType->isReferenceType () || ParamType->isNullPtrType()) ? static_cast<void> (0) : __assert_fail ("ParamType->isPointerType() || ParamType->isReferenceType() || ParamType->isNullPtrType()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6512, __PRETTY_FUNCTION__)); | |||
6513 | // -- a temporary object | |||
6514 | // -- a string literal | |||
6515 | // -- the result of a typeid expression, or | |||
6516 | // -- a predefined __func__ variable | |||
6517 | APValue::LValueBase Base = Value.getLValueBase(); | |||
6518 | auto *VD = const_cast<ValueDecl *>(Base.dyn_cast<const ValueDecl *>()); | |||
6519 | if (Base && !VD) { | |||
6520 | auto *E = Base.dyn_cast<const Expr *>(); | |||
6521 | if (E && isa<CXXUuidofExpr>(E)) { | |||
6522 | Converted = TemplateArgument(ArgResult.get()->IgnoreImpCasts()); | |||
6523 | break; | |||
6524 | } | |||
6525 | Diag(Arg->getBeginLoc(), diag::err_template_arg_not_decl_ref) | |||
6526 | << Arg->getSourceRange(); | |||
6527 | return ExprError(); | |||
6528 | } | |||
6529 | // -- a subobject | |||
6530 | if (Value.hasLValuePath() && Value.getLValuePath().size() == 1 && | |||
6531 | VD && VD->getType()->isArrayType() && | |||
6532 | Value.getLValuePath()[0].getAsArrayIndex() == 0 && | |||
6533 | !Value.isLValueOnePastTheEnd() && ParamType->isPointerType()) { | |||
6534 | // Per defect report (no number yet): | |||
6535 | // ... other than a pointer to the first element of a complete array | |||
6536 | // object. | |||
6537 | } else if (!Value.hasLValuePath() || Value.getLValuePath().size() || | |||
6538 | Value.isLValueOnePastTheEnd()) { | |||
6539 | Diag(StartLoc, diag::err_non_type_template_arg_subobject) | |||
6540 | << Value.getAsString(Context, ParamType); | |||
6541 | return ExprError(); | |||
6542 | } | |||
6543 | assert((VD || !ParamType->isReferenceType()) &&(((VD || !ParamType->isReferenceType()) && "null reference should not be a constant expression" ) ? static_cast<void> (0) : __assert_fail ("(VD || !ParamType->isReferenceType()) && \"null reference should not be a constant expression\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6544, __PRETTY_FUNCTION__)) | |||
6544 | "null reference should not be a constant expression")(((VD || !ParamType->isReferenceType()) && "null reference should not be a constant expression" ) ? static_cast<void> (0) : __assert_fail ("(VD || !ParamType->isReferenceType()) && \"null reference should not be a constant expression\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6544, __PRETTY_FUNCTION__)); | |||
6545 | assert((!VD || !ParamType->isNullPtrType()) &&(((!VD || !ParamType->isNullPtrType()) && "non-null value of type nullptr_t?" ) ? static_cast<void> (0) : __assert_fail ("(!VD || !ParamType->isNullPtrType()) && \"non-null value of type nullptr_t?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6546, __PRETTY_FUNCTION__)) | |||
6546 | "non-null value of type nullptr_t?")(((!VD || !ParamType->isNullPtrType()) && "non-null value of type nullptr_t?" ) ? static_cast<void> (0) : __assert_fail ("(!VD || !ParamType->isNullPtrType()) && \"non-null value of type nullptr_t?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6546, __PRETTY_FUNCTION__)); | |||
6547 | Converted = VD ? TemplateArgument(VD, CanonParamType) | |||
6548 | : TemplateArgument(CanonParamType, /*isNullPtr*/true); | |||
6549 | break; | |||
6550 | } | |||
6551 | case APValue::AddrLabelDiff: | |||
6552 | return Diag(StartLoc, diag::err_non_type_template_arg_addr_label_diff); | |||
6553 | case APValue::FixedPoint: | |||
6554 | case APValue::Float: | |||
6555 | case APValue::ComplexInt: | |||
6556 | case APValue::ComplexFloat: | |||
6557 | case APValue::Vector: | |||
6558 | case APValue::Array: | |||
6559 | case APValue::Struct: | |||
6560 | case APValue::Union: | |||
6561 | llvm_unreachable("invalid kind for template argument")::llvm::llvm_unreachable_internal("invalid kind for template argument" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6561); | |||
6562 | } | |||
6563 | ||||
6564 | return ArgResult.get(); | |||
6565 | } | |||
6566 | ||||
6567 | // C++ [temp.arg.nontype]p5: | |||
6568 | // The following conversions are performed on each expression used | |||
6569 | // as a non-type template-argument. If a non-type | |||
6570 | // template-argument cannot be converted to the type of the | |||
6571 | // corresponding template-parameter then the program is | |||
6572 | // ill-formed. | |||
6573 | if (ParamType->isIntegralOrEnumerationType()) { | |||
6574 | // C++11: | |||
6575 | // -- for a non-type template-parameter of integral or | |||
6576 | // enumeration type, conversions permitted in a converted | |||
6577 | // constant expression are applied. | |||
6578 | // | |||
6579 | // C++98: | |||
6580 | // -- for a non-type template-parameter of integral or | |||
6581 | // enumeration type, integral promotions (4.5) and integral | |||
6582 | // conversions (4.7) are applied. | |||
6583 | ||||
6584 | if (getLangOpts().CPlusPlus11) { | |||
6585 | // C++ [temp.arg.nontype]p1: | |||
6586 | // A template-argument for a non-type, non-template template-parameter | |||
6587 | // shall be one of: | |||
6588 | // | |||
6589 | // -- for a non-type template-parameter of integral or enumeration | |||
6590 | // type, a converted constant expression of the type of the | |||
6591 | // template-parameter; or | |||
6592 | llvm::APSInt Value; | |||
6593 | ExprResult ArgResult = | |||
6594 | CheckConvertedConstantExpression(Arg, ParamType, Value, | |||
6595 | CCEK_TemplateArg); | |||
6596 | if (ArgResult.isInvalid()) | |||
6597 | return ExprError(); | |||
6598 | ||||
6599 | // We can't check arbitrary value-dependent arguments. | |||
6600 | if (ArgResult.get()->isValueDependent()) { | |||
6601 | Converted = TemplateArgument(ArgResult.get()); | |||
6602 | return ArgResult; | |||
6603 | } | |||
6604 | ||||
6605 | // Widen the argument value to sizeof(parameter type). This is almost | |||
6606 | // always a no-op, except when the parameter type is bool. In | |||
6607 | // that case, this may extend the argument from 1 bit to 8 bits. | |||
6608 | QualType IntegerType = ParamType; | |||
6609 | if (const EnumType *Enum = IntegerType->getAs<EnumType>()) | |||
6610 | IntegerType = Enum->getDecl()->getIntegerType(); | |||
6611 | Value = Value.extOrTrunc(Context.getTypeSize(IntegerType)); | |||
6612 | ||||
6613 | Converted = TemplateArgument(Context, Value, | |||
6614 | Context.getCanonicalType(ParamType)); | |||
6615 | return ArgResult; | |||
6616 | } | |||
6617 | ||||
6618 | ExprResult ArgResult = DefaultLvalueConversion(Arg); | |||
6619 | if (ArgResult.isInvalid()) | |||
6620 | return ExprError(); | |||
6621 | Arg = ArgResult.get(); | |||
6622 | ||||
6623 | QualType ArgType = Arg->getType(); | |||
6624 | ||||
6625 | // C++ [temp.arg.nontype]p1: | |||
6626 | // A template-argument for a non-type, non-template | |||
6627 | // template-parameter shall be one of: | |||
6628 | // | |||
6629 | // -- an integral constant-expression of integral or enumeration | |||
6630 | // type; or | |||
6631 | // -- the name of a non-type template-parameter; or | |||
6632 | llvm::APSInt Value; | |||
6633 | if (!ArgType->isIntegralOrEnumerationType()) { | |||
6634 | Diag(Arg->getBeginLoc(), diag::err_template_arg_not_integral_or_enumeral) | |||
6635 | << ArgType << Arg->getSourceRange(); | |||
6636 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
6637 | return ExprError(); | |||
6638 | } else if (!Arg->isValueDependent()) { | |||
6639 | class TmplArgICEDiagnoser : public VerifyICEDiagnoser { | |||
6640 | QualType T; | |||
6641 | ||||
6642 | public: | |||
6643 | TmplArgICEDiagnoser(QualType T) : T(T) { } | |||
6644 | ||||
6645 | void diagnoseNotICE(Sema &S, SourceLocation Loc, | |||
6646 | SourceRange SR) override { | |||
6647 | S.Diag(Loc, diag::err_template_arg_not_ice) << T << SR; | |||
6648 | } | |||
6649 | } Diagnoser(ArgType); | |||
6650 | ||||
6651 | Arg = VerifyIntegerConstantExpression(Arg, &Value, Diagnoser, | |||
6652 | false).get(); | |||
6653 | if (!Arg) | |||
6654 | return ExprError(); | |||
6655 | } | |||
6656 | ||||
6657 | // From here on out, all we care about is the unqualified form | |||
6658 | // of the argument type. | |||
6659 | ArgType = ArgType.getUnqualifiedType(); | |||
6660 | ||||
6661 | // Try to convert the argument to the parameter's type. | |||
6662 | if (Context.hasSameType(ParamType, ArgType)) { | |||
6663 | // Okay: no conversion necessary | |||
6664 | } else if (ParamType->isBooleanType()) { | |||
6665 | // This is an integral-to-boolean conversion. | |||
6666 | Arg = ImpCastExprToType(Arg, ParamType, CK_IntegralToBoolean).get(); | |||
6667 | } else if (IsIntegralPromotion(Arg, ArgType, ParamType) || | |||
6668 | !ParamType->isEnumeralType()) { | |||
6669 | // This is an integral promotion or conversion. | |||
6670 | Arg = ImpCastExprToType(Arg, ParamType, CK_IntegralCast).get(); | |||
6671 | } else { | |||
6672 | // We can't perform this conversion. | |||
6673 | Diag(Arg->getBeginLoc(), diag::err_template_arg_not_convertible) | |||
6674 | << Arg->getType() << ParamType << Arg->getSourceRange(); | |||
6675 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
6676 | return ExprError(); | |||
6677 | } | |||
6678 | ||||
6679 | // Add the value of this argument to the list of converted | |||
6680 | // arguments. We use the bitwidth and signedness of the template | |||
6681 | // parameter. | |||
6682 | if (Arg->isValueDependent()) { | |||
6683 | // The argument is value-dependent. Create a new | |||
6684 | // TemplateArgument with the converted expression. | |||
6685 | Converted = TemplateArgument(Arg); | |||
6686 | return Arg; | |||
6687 | } | |||
6688 | ||||
6689 | QualType IntegerType = Context.getCanonicalType(ParamType); | |||
6690 | if (const EnumType *Enum = IntegerType->getAs<EnumType>()) | |||
6691 | IntegerType = Context.getCanonicalType(Enum->getDecl()->getIntegerType()); | |||
6692 | ||||
6693 | if (ParamType->isBooleanType()) { | |||
6694 | // Value must be zero or one. | |||
6695 | Value = Value != 0; | |||
6696 | unsigned AllowedBits = Context.getTypeSize(IntegerType); | |||
6697 | if (Value.getBitWidth() != AllowedBits) | |||
6698 | Value = Value.extOrTrunc(AllowedBits); | |||
6699 | Value.setIsSigned(IntegerType->isSignedIntegerOrEnumerationType()); | |||
6700 | } else { | |||
6701 | llvm::APSInt OldValue = Value; | |||
6702 | ||||
6703 | // Coerce the template argument's value to the value it will have | |||
6704 | // based on the template parameter's type. | |||
6705 | unsigned AllowedBits = Context.getTypeSize(IntegerType); | |||
6706 | if (Value.getBitWidth() != AllowedBits) | |||
6707 | Value = Value.extOrTrunc(AllowedBits); | |||
6708 | Value.setIsSigned(IntegerType->isSignedIntegerOrEnumerationType()); | |||
6709 | ||||
6710 | // Complain if an unsigned parameter received a negative value. | |||
6711 | if (IntegerType->isUnsignedIntegerOrEnumerationType() | |||
6712 | && (OldValue.isSigned() && OldValue.isNegative())) { | |||
6713 | Diag(Arg->getBeginLoc(), diag::warn_template_arg_negative) | |||
6714 | << OldValue.toString(10) << Value.toString(10) << Param->getType() | |||
6715 | << Arg->getSourceRange(); | |||
6716 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
6717 | } | |||
6718 | ||||
6719 | // Complain if we overflowed the template parameter's type. | |||
6720 | unsigned RequiredBits; | |||
6721 | if (IntegerType->isUnsignedIntegerOrEnumerationType()) | |||
6722 | RequiredBits = OldValue.getActiveBits(); | |||
6723 | else if (OldValue.isUnsigned()) | |||
6724 | RequiredBits = OldValue.getActiveBits() + 1; | |||
6725 | else | |||
6726 | RequiredBits = OldValue.getMinSignedBits(); | |||
6727 | if (RequiredBits > AllowedBits) { | |||
6728 | Diag(Arg->getBeginLoc(), diag::warn_template_arg_too_large) | |||
6729 | << OldValue.toString(10) << Value.toString(10) << Param->getType() | |||
6730 | << Arg->getSourceRange(); | |||
6731 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
6732 | } | |||
6733 | } | |||
6734 | ||||
6735 | Converted = TemplateArgument(Context, Value, | |||
6736 | ParamType->isEnumeralType() | |||
6737 | ? Context.getCanonicalType(ParamType) | |||
6738 | : IntegerType); | |||
6739 | return Arg; | |||
6740 | } | |||
6741 | ||||
6742 | QualType ArgType = Arg->getType(); | |||
6743 | DeclAccessPair FoundResult; // temporary for ResolveOverloadedFunction | |||
6744 | ||||
6745 | // Handle pointer-to-function, reference-to-function, and | |||
6746 | // pointer-to-member-function all in (roughly) the same way. | |||
6747 | if (// -- For a non-type template-parameter of type pointer to | |||
6748 | // function, only the function-to-pointer conversion (4.3) is | |||
6749 | // applied. If the template-argument represents a set of | |||
6750 | // overloaded functions (or a pointer to such), the matching | |||
6751 | // function is selected from the set (13.4). | |||
6752 | (ParamType->isPointerType() && | |||
6753 | ParamType->getAs<PointerType>()->getPointeeType()->isFunctionType()) || | |||
6754 | // -- For a non-type template-parameter of type reference to | |||
6755 | // function, no conversions apply. If the template-argument | |||
6756 | // represents a set of overloaded functions, the matching | |||
6757 | // function is selected from the set (13.4). | |||
6758 | (ParamType->isReferenceType() && | |||
6759 | ParamType->getAs<ReferenceType>()->getPointeeType()->isFunctionType()) || | |||
| ||||
6760 | // -- For a non-type template-parameter of type pointer to | |||
6761 | // member function, no conversions apply. If the | |||
6762 | // template-argument represents a set of overloaded member | |||
6763 | // functions, the matching member function is selected from | |||
6764 | // the set (13.4). | |||
6765 | (ParamType->isMemberPointerType() && | |||
6766 | ParamType->getAs<MemberPointerType>()->getPointeeType() | |||
6767 | ->isFunctionType())) { | |||
6768 | ||||
6769 | if (Arg->getType() == Context.OverloadTy) { | |||
6770 | if (FunctionDecl *Fn = ResolveAddressOfOverloadedFunction(Arg, ParamType, | |||
6771 | true, | |||
6772 | FoundResult)) { | |||
6773 | if (DiagnoseUseOfDecl(Fn, Arg->getBeginLoc())) | |||
6774 | return ExprError(); | |||
6775 | ||||
6776 | Arg = FixOverloadedFunctionReference(Arg, FoundResult, Fn); | |||
6777 | ArgType = Arg->getType(); | |||
6778 | } else | |||
6779 | return ExprError(); | |||
6780 | } | |||
6781 | ||||
6782 | if (!ParamType->isMemberPointerType()) { | |||
6783 | if (CheckTemplateArgumentAddressOfObjectOrFunction(*this, Param, | |||
6784 | ParamType, | |||
6785 | Arg, Converted)) | |||
6786 | return ExprError(); | |||
6787 | return Arg; | |||
6788 | } | |||
6789 | ||||
6790 | if (CheckTemplateArgumentPointerToMember(*this, Param, ParamType, Arg, | |||
6791 | Converted)) | |||
6792 | return ExprError(); | |||
6793 | return Arg; | |||
6794 | } | |||
6795 | ||||
6796 | if (ParamType->isPointerType()) { | |||
6797 | // -- for a non-type template-parameter of type pointer to | |||
6798 | // object, qualification conversions (4.4) and the | |||
6799 | // array-to-pointer conversion (4.2) are applied. | |||
6800 | // C++0x also allows a value of std::nullptr_t. | |||
6801 | assert(ParamType->getPointeeType()->isIncompleteOrObjectType() &&((ParamType->getPointeeType()->isIncompleteOrObjectType () && "Only object pointers allowed here") ? static_cast <void> (0) : __assert_fail ("ParamType->getPointeeType()->isIncompleteOrObjectType() && \"Only object pointers allowed here\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6802, __PRETTY_FUNCTION__)) | |||
6802 | "Only object pointers allowed here")((ParamType->getPointeeType()->isIncompleteOrObjectType () && "Only object pointers allowed here") ? static_cast <void> (0) : __assert_fail ("ParamType->getPointeeType()->isIncompleteOrObjectType() && \"Only object pointers allowed here\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6802, __PRETTY_FUNCTION__)); | |||
6803 | ||||
6804 | if (CheckTemplateArgumentAddressOfObjectOrFunction(*this, Param, | |||
6805 | ParamType, | |||
6806 | Arg, Converted)) | |||
6807 | return ExprError(); | |||
6808 | return Arg; | |||
6809 | } | |||
6810 | ||||
6811 | if (const ReferenceType *ParamRefType = ParamType->getAs<ReferenceType>()) { | |||
6812 | // -- For a non-type template-parameter of type reference to | |||
6813 | // object, no conversions apply. The type referred to by the | |||
6814 | // reference may be more cv-qualified than the (otherwise | |||
6815 | // identical) type of the template-argument. The | |||
6816 | // template-parameter is bound directly to the | |||
6817 | // template-argument, which must be an lvalue. | |||
6818 | assert(ParamRefType->getPointeeType()->isIncompleteOrObjectType() &&((ParamRefType->getPointeeType()->isIncompleteOrObjectType () && "Only object references allowed here") ? static_cast <void> (0) : __assert_fail ("ParamRefType->getPointeeType()->isIncompleteOrObjectType() && \"Only object references allowed here\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6819, __PRETTY_FUNCTION__)) | |||
6819 | "Only object references allowed here")((ParamRefType->getPointeeType()->isIncompleteOrObjectType () && "Only object references allowed here") ? static_cast <void> (0) : __assert_fail ("ParamRefType->getPointeeType()->isIncompleteOrObjectType() && \"Only object references allowed here\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6819, __PRETTY_FUNCTION__)); | |||
6820 | ||||
6821 | if (Arg->getType() == Context.OverloadTy) { | |||
6822 | if (FunctionDecl *Fn = ResolveAddressOfOverloadedFunction(Arg, | |||
6823 | ParamRefType->getPointeeType(), | |||
6824 | true, | |||
6825 | FoundResult)) { | |||
6826 | if (DiagnoseUseOfDecl(Fn, Arg->getBeginLoc())) | |||
6827 | return ExprError(); | |||
6828 | ||||
6829 | Arg = FixOverloadedFunctionReference(Arg, FoundResult, Fn); | |||
6830 | ArgType = Arg->getType(); | |||
6831 | } else | |||
6832 | return ExprError(); | |||
6833 | } | |||
6834 | ||||
6835 | if (CheckTemplateArgumentAddressOfObjectOrFunction(*this, Param, | |||
6836 | ParamType, | |||
6837 | Arg, Converted)) | |||
6838 | return ExprError(); | |||
6839 | return Arg; | |||
6840 | } | |||
6841 | ||||
6842 | // Deal with parameters of type std::nullptr_t. | |||
6843 | if (ParamType->isNullPtrType()) { | |||
6844 | if (Arg->isTypeDependent() || Arg->isValueDependent()) { | |||
6845 | Converted = TemplateArgument(Arg); | |||
6846 | return Arg; | |||
6847 | } | |||
6848 | ||||
6849 | switch (isNullPointerValueTemplateArgument(*this, Param, ParamType, Arg)) { | |||
6850 | case NPV_NotNullPointer: | |||
6851 | Diag(Arg->getExprLoc(), diag::err_template_arg_not_convertible) | |||
6852 | << Arg->getType() << ParamType; | |||
6853 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
6854 | return ExprError(); | |||
6855 | ||||
6856 | case NPV_Error: | |||
6857 | return ExprError(); | |||
6858 | ||||
6859 | case NPV_NullPointer: | |||
6860 | Diag(Arg->getExprLoc(), diag::warn_cxx98_compat_template_arg_null); | |||
6861 | Converted = TemplateArgument(Context.getCanonicalType(ParamType), | |||
6862 | /*isNullPtr*/true); | |||
6863 | return Arg; | |||
6864 | } | |||
6865 | } | |||
6866 | ||||
6867 | // -- For a non-type template-parameter of type pointer to data | |||
6868 | // member, qualification conversions (4.4) are applied. | |||
6869 | assert(ParamType->isMemberPointerType() && "Only pointers to members remain")((ParamType->isMemberPointerType() && "Only pointers to members remain" ) ? static_cast<void> (0) : __assert_fail ("ParamType->isMemberPointerType() && \"Only pointers to members remain\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6869, __PRETTY_FUNCTION__)); | |||
6870 | ||||
6871 | if (CheckTemplateArgumentPointerToMember(*this, Param, ParamType, Arg, | |||
6872 | Converted)) | |||
6873 | return ExprError(); | |||
6874 | return Arg; | |||
6875 | } | |||
6876 | ||||
6877 | static void DiagnoseTemplateParameterListArityMismatch( | |||
6878 | Sema &S, TemplateParameterList *New, TemplateParameterList *Old, | |||
6879 | Sema::TemplateParameterListEqualKind Kind, SourceLocation TemplateArgLoc); | |||
6880 | ||||
6881 | /// Check a template argument against its corresponding | |||
6882 | /// template template parameter. | |||
6883 | /// | |||
6884 | /// This routine implements the semantics of C++ [temp.arg.template]. | |||
6885 | /// It returns true if an error occurred, and false otherwise. | |||
6886 | bool Sema::CheckTemplateTemplateArgument(TemplateParameterList *Params, | |||
6887 | TemplateArgumentLoc &Arg) { | |||
6888 | TemplateName Name = Arg.getArgument().getAsTemplateOrTemplatePattern(); | |||
6889 | TemplateDecl *Template = Name.getAsTemplateDecl(); | |||
6890 | if (!Template) { | |||
6891 | // Any dependent template name is fine. | |||
6892 | assert(Name.isDependent() && "Non-dependent template isn't a declaration?")((Name.isDependent() && "Non-dependent template isn't a declaration?" ) ? static_cast<void> (0) : __assert_fail ("Name.isDependent() && \"Non-dependent template isn't a declaration?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6892, __PRETTY_FUNCTION__)); | |||
6893 | return false; | |||
6894 | } | |||
6895 | ||||
6896 | if (Template->isInvalidDecl()) | |||
6897 | return true; | |||
6898 | ||||
6899 | // C++0x [temp.arg.template]p1: | |||
6900 | // A template-argument for a template template-parameter shall be | |||
6901 | // the name of a class template or an alias template, expressed as an | |||
6902 | // id-expression. When the template-argument names a class template, only | |||
6903 | // primary class templates are considered when matching the | |||
6904 | // template template argument with the corresponding parameter; | |||
6905 | // partial specializations are not considered even if their | |||
6906 | // parameter lists match that of the template template parameter. | |||
6907 | // | |||
6908 | // Note that we also allow template template parameters here, which | |||
6909 | // will happen when we are dealing with, e.g., class template | |||
6910 | // partial specializations. | |||
6911 | if (!isa<ClassTemplateDecl>(Template) && | |||
6912 | !isa<TemplateTemplateParmDecl>(Template) && | |||
6913 | !isa<TypeAliasTemplateDecl>(Template) && | |||
6914 | !isa<BuiltinTemplateDecl>(Template)) { | |||
6915 | assert(isa<FunctionTemplateDecl>(Template) &&((isa<FunctionTemplateDecl>(Template) && "Only function templates are possible here" ) ? static_cast<void> (0) : __assert_fail ("isa<FunctionTemplateDecl>(Template) && \"Only function templates are possible here\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6916, __PRETTY_FUNCTION__)) | |||
6916 | "Only function templates are possible here")((isa<FunctionTemplateDecl>(Template) && "Only function templates are possible here" ) ? static_cast<void> (0) : __assert_fail ("isa<FunctionTemplateDecl>(Template) && \"Only function templates are possible here\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6916, __PRETTY_FUNCTION__)); | |||
6917 | Diag(Arg.getLocation(), diag::err_template_arg_not_valid_template); | |||
6918 | Diag(Template->getLocation(), diag::note_template_arg_refers_here_func) | |||
6919 | << Template; | |||
6920 | } | |||
6921 | ||||
6922 | // C++1z [temp.arg.template]p3: (DR 150) | |||
6923 | // A template-argument matches a template template-parameter P when P | |||
6924 | // is at least as specialized as the template-argument A. | |||
6925 | if (getLangOpts().RelaxedTemplateTemplateArgs) { | |||
6926 | // Quick check for the common case: | |||
6927 | // If P contains a parameter pack, then A [...] matches P if each of A's | |||
6928 | // template parameters matches the corresponding template parameter in | |||
6929 | // the template-parameter-list of P. | |||
6930 | if (TemplateParameterListsAreEqual( | |||
6931 | Template->getTemplateParameters(), Params, false, | |||
6932 | TPL_TemplateTemplateArgumentMatch, Arg.getLocation())) | |||
6933 | return false; | |||
6934 | ||||
6935 | if (isTemplateTemplateParameterAtLeastAsSpecializedAs(Params, Template, | |||
6936 | Arg.getLocation())) | |||
6937 | return false; | |||
6938 | // FIXME: Produce better diagnostics for deduction failures. | |||
6939 | } | |||
6940 | ||||
6941 | return !TemplateParameterListsAreEqual(Template->getTemplateParameters(), | |||
6942 | Params, | |||
6943 | true, | |||
6944 | TPL_TemplateTemplateArgumentMatch, | |||
6945 | Arg.getLocation()); | |||
6946 | } | |||
6947 | ||||
6948 | /// Given a non-type template argument that refers to a | |||
6949 | /// declaration and the type of its corresponding non-type template | |||
6950 | /// parameter, produce an expression that properly refers to that | |||
6951 | /// declaration. | |||
6952 | ExprResult | |||
6953 | Sema::BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, | |||
6954 | QualType ParamType, | |||
6955 | SourceLocation Loc) { | |||
6956 | // C++ [temp.param]p8: | |||
6957 | // | |||
6958 | // A non-type template-parameter of type "array of T" or | |||
6959 | // "function returning T" is adjusted to be of type "pointer to | |||
6960 | // T" or "pointer to function returning T", respectively. | |||
6961 | if (ParamType->isArrayType()) | |||
6962 | ParamType = Context.getArrayDecayedType(ParamType); | |||
6963 | else if (ParamType->isFunctionType()) | |||
6964 | ParamType = Context.getPointerType(ParamType); | |||
6965 | ||||
6966 | // For a NULL non-type template argument, return nullptr casted to the | |||
6967 | // parameter's type. | |||
6968 | if (Arg.getKind() == TemplateArgument::NullPtr) { | |||
6969 | return ImpCastExprToType( | |||
6970 | new (Context) CXXNullPtrLiteralExpr(Context.NullPtrTy, Loc), | |||
6971 | ParamType, | |||
6972 | ParamType->getAs<MemberPointerType>() | |||
6973 | ? CK_NullToMemberPointer | |||
6974 | : CK_NullToPointer); | |||
6975 | } | |||
6976 | assert(Arg.getKind() == TemplateArgument::Declaration &&((Arg.getKind() == TemplateArgument::Declaration && "Only declaration template arguments permitted here" ) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Declaration && \"Only declaration template arguments permitted here\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6977, __PRETTY_FUNCTION__)) | |||
6977 | "Only declaration template arguments permitted here")((Arg.getKind() == TemplateArgument::Declaration && "Only declaration template arguments permitted here" ) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Declaration && \"Only declaration template arguments permitted here\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 6977, __PRETTY_FUNCTION__)); | |||
6978 | ||||
6979 | ValueDecl *VD = Arg.getAsDecl(); | |||
6980 | ||||
6981 | if (VD->getDeclContext()->isRecord() && | |||
6982 | (isa<CXXMethodDecl>(VD) || isa<FieldDecl>(VD) || | |||
6983 | isa<IndirectFieldDecl>(VD))) { | |||
6984 | // If the value is a class member, we might have a pointer-to-member. | |||
6985 | // Determine whether the non-type template template parameter is of | |||
6986 | // pointer-to-member type. If so, we need to build an appropriate | |||
6987 | // expression for a pointer-to-member, since a "normal" DeclRefExpr | |||
6988 | // would refer to the member itself. | |||
6989 | if (ParamType->isMemberPointerType()) { | |||
6990 | QualType ClassType | |||
6991 | = Context.getTypeDeclType(cast<RecordDecl>(VD->getDeclContext())); | |||
6992 | NestedNameSpecifier *Qualifier | |||
6993 | = NestedNameSpecifier::Create(Context, nullptr, false, | |||
6994 | ClassType.getTypePtr()); | |||
6995 | CXXScopeSpec SS; | |||
6996 | SS.MakeTrivial(Context, Qualifier, Loc); | |||
6997 | ||||
6998 | // The actual value-ness of this is unimportant, but for | |||
6999 | // internal consistency's sake, references to instance methods | |||
7000 | // are r-values. | |||
7001 | ExprValueKind VK = VK_LValue; | |||
7002 | if (isa<CXXMethodDecl>(VD) && cast<CXXMethodDecl>(VD)->isInstance()) | |||
7003 | VK = VK_RValue; | |||
7004 | ||||
7005 | ExprResult RefExpr = BuildDeclRefExpr(VD, | |||
7006 | VD->getType().getNonReferenceType(), | |||
7007 | VK, | |||
7008 | Loc, | |||
7009 | &SS); | |||
7010 | if (RefExpr.isInvalid()) | |||
7011 | return ExprError(); | |||
7012 | ||||
7013 | RefExpr = CreateBuiltinUnaryOp(Loc, UO_AddrOf, RefExpr.get()); | |||
7014 | ||||
7015 | // We might need to perform a trailing qualification conversion, since | |||
7016 | // the element type on the parameter could be more qualified than the | |||
7017 | // element type in the expression we constructed. | |||
7018 | bool ObjCLifetimeConversion; | |||
7019 | if (IsQualificationConversion(((Expr*) RefExpr.get())->getType(), | |||
7020 | ParamType.getUnqualifiedType(), false, | |||
7021 | ObjCLifetimeConversion)) | |||
7022 | RefExpr = ImpCastExprToType(RefExpr.get(), ParamType.getUnqualifiedType(), CK_NoOp); | |||
7023 | ||||
7024 | assert(!RefExpr.isInvalid() &&((!RefExpr.isInvalid() && Context.hasSameType(((Expr* ) RefExpr.get())->getType(), ParamType.getUnqualifiedType( ))) ? static_cast<void> (0) : __assert_fail ("!RefExpr.isInvalid() && Context.hasSameType(((Expr*) RefExpr.get())->getType(), ParamType.getUnqualifiedType())" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 7026, __PRETTY_FUNCTION__)) | |||
7025 | Context.hasSameType(((Expr*) RefExpr.get())->getType(),((!RefExpr.isInvalid() && Context.hasSameType(((Expr* ) RefExpr.get())->getType(), ParamType.getUnqualifiedType( ))) ? static_cast<void> (0) : __assert_fail ("!RefExpr.isInvalid() && Context.hasSameType(((Expr*) RefExpr.get())->getType(), ParamType.getUnqualifiedType())" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 7026, __PRETTY_FUNCTION__)) | |||
7026 | ParamType.getUnqualifiedType()))((!RefExpr.isInvalid() && Context.hasSameType(((Expr* ) RefExpr.get())->getType(), ParamType.getUnqualifiedType( ))) ? static_cast<void> (0) : __assert_fail ("!RefExpr.isInvalid() && Context.hasSameType(((Expr*) RefExpr.get())->getType(), ParamType.getUnqualifiedType())" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 7026, __PRETTY_FUNCTION__)); | |||
7027 | return RefExpr; | |||
7028 | } | |||
7029 | } | |||
7030 | ||||
7031 | QualType T = VD->getType().getNonReferenceType(); | |||
7032 | ||||
7033 | if (ParamType->isPointerType()) { | |||
7034 | // When the non-type template parameter is a pointer, take the | |||
7035 | // address of the declaration. | |||
7036 | ExprResult RefExpr = BuildDeclRefExpr(VD, T, VK_LValue, Loc); | |||
7037 | if (RefExpr.isInvalid()) | |||
7038 | return ExprError(); | |||
7039 | ||||
7040 | if (!Context.hasSameUnqualifiedType(ParamType->getPointeeType(), T) && | |||
7041 | (T->isFunctionType() || T->isArrayType())) { | |||
7042 | // Decay functions and arrays unless we're forming a pointer to array. | |||
7043 | RefExpr = DefaultFunctionArrayConversion(RefExpr.get()); | |||
7044 | if (RefExpr.isInvalid()) | |||
7045 | return ExprError(); | |||
7046 | ||||
7047 | return RefExpr; | |||
7048 | } | |||
7049 | ||||
7050 | // Take the address of everything else | |||
7051 | return CreateBuiltinUnaryOp(Loc, UO_AddrOf, RefExpr.get()); | |||
7052 | } | |||
7053 | ||||
7054 | ExprValueKind VK = VK_RValue; | |||
7055 | ||||
7056 | // If the non-type template parameter has reference type, qualify the | |||
7057 | // resulting declaration reference with the extra qualifiers on the | |||
7058 | // type that the reference refers to. | |||
7059 | if (const ReferenceType *TargetRef = ParamType->getAs<ReferenceType>()) { | |||
7060 | VK = VK_LValue; | |||
7061 | T = Context.getQualifiedType(T, | |||
7062 | TargetRef->getPointeeType().getQualifiers()); | |||
7063 | } else if (isa<FunctionDecl>(VD)) { | |||
7064 | // References to functions are always lvalues. | |||
7065 | VK = VK_LValue; | |||
7066 | } | |||
7067 | ||||
7068 | return BuildDeclRefExpr(VD, T, VK, Loc); | |||
7069 | } | |||
7070 | ||||
7071 | /// Construct a new expression that refers to the given | |||
7072 | /// integral template argument with the given source-location | |||
7073 | /// information. | |||
7074 | /// | |||
7075 | /// This routine takes care of the mapping from an integral template | |||
7076 | /// argument (which may have any integral type) to the appropriate | |||
7077 | /// literal value. | |||
7078 | ExprResult | |||
7079 | Sema::BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, | |||
7080 | SourceLocation Loc) { | |||
7081 | assert(Arg.getKind() == TemplateArgument::Integral &&((Arg.getKind() == TemplateArgument::Integral && "Operation is only valid for integral template arguments" ) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Integral && \"Operation is only valid for integral template arguments\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 7082, __PRETTY_FUNCTION__)) | |||
7082 | "Operation is only valid for integral template arguments")((Arg.getKind() == TemplateArgument::Integral && "Operation is only valid for integral template arguments" ) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Integral && \"Operation is only valid for integral template arguments\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 7082, __PRETTY_FUNCTION__)); | |||
7083 | QualType OrigT = Arg.getIntegralType(); | |||
7084 | ||||
7085 | // If this is an enum type that we're instantiating, we need to use an integer | |||
7086 | // type the same size as the enumerator. We don't want to build an | |||
7087 | // IntegerLiteral with enum type. The integer type of an enum type can be of | |||
7088 | // any integral type with C++11 enum classes, make sure we create the right | |||
7089 | // type of literal for it. | |||
7090 | QualType T = OrigT; | |||
7091 | if (const EnumType *ET = OrigT->getAs<EnumType>()) | |||
7092 | T = ET->getDecl()->getIntegerType(); | |||
7093 | ||||
7094 | Expr *E; | |||
7095 | if (T->isAnyCharacterType()) { | |||
7096 | CharacterLiteral::CharacterKind Kind; | |||
7097 | if (T->isWideCharType()) | |||
7098 | Kind = CharacterLiteral::Wide; | |||
7099 | else if (T->isChar8Type() && getLangOpts().Char8) | |||
7100 | Kind = CharacterLiteral::UTF8; | |||
7101 | else if (T->isChar16Type()) | |||
7102 | Kind = CharacterLiteral::UTF16; | |||
7103 | else if (T->isChar32Type()) | |||
7104 | Kind = CharacterLiteral::UTF32; | |||
7105 | else | |||
7106 | Kind = CharacterLiteral::Ascii; | |||
7107 | ||||
7108 | E = new (Context) CharacterLiteral(Arg.getAsIntegral().getZExtValue(), | |||
7109 | Kind, T, Loc); | |||
7110 | } else if (T->isBooleanType()) { | |||
7111 | E = new (Context) CXXBoolLiteralExpr(Arg.getAsIntegral().getBoolValue(), | |||
7112 | T, Loc); | |||
7113 | } else if (T->isNullPtrType()) { | |||
7114 | E = new (Context) CXXNullPtrLiteralExpr(Context.NullPtrTy, Loc); | |||
7115 | } else { | |||
7116 | E = IntegerLiteral::Create(Context, Arg.getAsIntegral(), T, Loc); | |||
7117 | } | |||
7118 | ||||
7119 | if (OrigT->isEnumeralType()) { | |||
7120 | // FIXME: This is a hack. We need a better way to handle substituted | |||
7121 | // non-type template parameters. | |||
7122 | E = CStyleCastExpr::Create(Context, OrigT, VK_RValue, CK_IntegralCast, E, | |||
7123 | nullptr, | |||
7124 | Context.getTrivialTypeSourceInfo(OrigT, Loc), | |||
7125 | Loc, Loc); | |||
7126 | } | |||
7127 | ||||
7128 | return E; | |||
7129 | } | |||
7130 | ||||
7131 | /// Match two template parameters within template parameter lists. | |||
7132 | static bool MatchTemplateParameterKind(Sema &S, NamedDecl *New, NamedDecl *Old, | |||
7133 | bool Complain, | |||
7134 | Sema::TemplateParameterListEqualKind Kind, | |||
7135 | SourceLocation TemplateArgLoc) { | |||
7136 | // Check the actual kind (type, non-type, template). | |||
7137 | if (Old->getKind() != New->getKind()) { | |||
7138 | if (Complain) { | |||
7139 | unsigned NextDiag = diag::err_template_param_different_kind; | |||
7140 | if (TemplateArgLoc.isValid()) { | |||
7141 | S.Diag(TemplateArgLoc, diag::err_template_arg_template_params_mismatch); | |||
7142 | NextDiag = diag::note_template_param_different_kind; | |||
7143 | } | |||
7144 | S.Diag(New->getLocation(), NextDiag) | |||
7145 | << (Kind != Sema::TPL_TemplateMatch); | |||
7146 | S.Diag(Old->getLocation(), diag::note_template_prev_declaration) | |||
7147 | << (Kind != Sema::TPL_TemplateMatch); | |||
7148 | } | |||
7149 | ||||
7150 | return false; | |||
7151 | } | |||
7152 | ||||
7153 | // Check that both are parameter packs or neither are parameter packs. | |||
7154 | // However, if we are matching a template template argument to a | |||
7155 | // template template parameter, the template template parameter can have | |||
7156 | // a parameter pack where the template template argument does not. | |||
7157 | if (Old->isTemplateParameterPack() != New->isTemplateParameterPack() && | |||
7158 | !(Kind == Sema::TPL_TemplateTemplateArgumentMatch && | |||
7159 | Old->isTemplateParameterPack())) { | |||
7160 | if (Complain) { | |||
7161 | unsigned NextDiag = diag::err_template_parameter_pack_non_pack; | |||
7162 | if (TemplateArgLoc.isValid()) { | |||
7163 | S.Diag(TemplateArgLoc, | |||
7164 | diag::err_template_arg_template_params_mismatch); | |||
7165 | NextDiag = diag::note_template_parameter_pack_non_pack; | |||
7166 | } | |||
7167 | ||||
7168 | unsigned ParamKind = isa<TemplateTypeParmDecl>(New)? 0 | |||
7169 | : isa<NonTypeTemplateParmDecl>(New)? 1 | |||
7170 | : 2; | |||
7171 | S.Diag(New->getLocation(), NextDiag) | |||
7172 | << ParamKind << New->isParameterPack(); | |||
7173 | S.Diag(Old->getLocation(), diag::note_template_parameter_pack_here) | |||
7174 | << ParamKind << Old->isParameterPack(); | |||
7175 | } | |||
7176 | ||||
7177 | return false; | |||
7178 | } | |||
7179 | ||||
7180 | // For non-type template parameters, check the type of the parameter. | |||
7181 | if (NonTypeTemplateParmDecl *OldNTTP | |||
7182 | = dyn_cast<NonTypeTemplateParmDecl>(Old)) { | |||
7183 | NonTypeTemplateParmDecl *NewNTTP = cast<NonTypeTemplateParmDecl>(New); | |||
7184 | ||||
7185 | // If we are matching a template template argument to a template | |||
7186 | // template parameter and one of the non-type template parameter types | |||
7187 | // is dependent, then we must wait until template instantiation time | |||
7188 | // to actually compare the arguments. | |||
7189 | if (Kind == Sema::TPL_TemplateTemplateArgumentMatch && | |||
7190 | (OldNTTP->getType()->isDependentType() || | |||
7191 | NewNTTP->getType()->isDependentType())) | |||
7192 | return true; | |||
7193 | ||||
7194 | if (!S.Context.hasSameType(OldNTTP->getType(), NewNTTP->getType())) { | |||
7195 | if (Complain) { | |||
7196 | unsigned NextDiag = diag::err_template_nontype_parm_different_type; | |||
7197 | if (TemplateArgLoc.isValid()) { | |||
7198 | S.Diag(TemplateArgLoc, | |||
7199 | diag::err_template_arg_template_params_mismatch); | |||
7200 | NextDiag = diag::note_template_nontype_parm_different_type; | |||
7201 | } | |||
7202 | S.Diag(NewNTTP->getLocation(), NextDiag) | |||
7203 | << NewNTTP->getType() | |||
7204 | << (Kind != Sema::TPL_TemplateMatch); | |||
7205 | S.Diag(OldNTTP->getLocation(), | |||
7206 | diag::note_template_nontype_parm_prev_declaration) | |||
7207 | << OldNTTP->getType(); | |||
7208 | } | |||
7209 | ||||
7210 | return false; | |||
7211 | } | |||
7212 | ||||
7213 | return true; | |||
7214 | } | |||
7215 | ||||
7216 | // For template template parameters, check the template parameter types. | |||
7217 | // The template parameter lists of template template | |||
7218 | // parameters must agree. | |||
7219 | if (TemplateTemplateParmDecl *OldTTP | |||
7220 | = dyn_cast<TemplateTemplateParmDecl>(Old)) { | |||
7221 | TemplateTemplateParmDecl *NewTTP = cast<TemplateTemplateParmDecl>(New); | |||
7222 | return S.TemplateParameterListsAreEqual(NewTTP->getTemplateParameters(), | |||
7223 | OldTTP->getTemplateParameters(), | |||
7224 | Complain, | |||
7225 | (Kind == Sema::TPL_TemplateMatch | |||
7226 | ? Sema::TPL_TemplateTemplateParmMatch | |||
7227 | : Kind), | |||
7228 | TemplateArgLoc); | |||
7229 | } | |||
7230 | ||||
7231 | return true; | |||
7232 | } | |||
7233 | ||||
7234 | /// Diagnose a known arity mismatch when comparing template argument | |||
7235 | /// lists. | |||
7236 | static | |||
7237 | void DiagnoseTemplateParameterListArityMismatch(Sema &S, | |||
7238 | TemplateParameterList *New, | |||
7239 | TemplateParameterList *Old, | |||
7240 | Sema::TemplateParameterListEqualKind Kind, | |||
7241 | SourceLocation TemplateArgLoc) { | |||
7242 | unsigned NextDiag = diag::err_template_param_list_different_arity; | |||
7243 | if (TemplateArgLoc.isValid()) { | |||
7244 | S.Diag(TemplateArgLoc, diag::err_template_arg_template_params_mismatch); | |||
7245 | NextDiag = diag::note_template_param_list_different_arity; | |||
7246 | } | |||
7247 | S.Diag(New->getTemplateLoc(), NextDiag) | |||
7248 | << (New->size() > Old->size()) | |||
7249 | << (Kind != Sema::TPL_TemplateMatch) | |||
7250 | << SourceRange(New->getTemplateLoc(), New->getRAngleLoc()); | |||
7251 | S.Diag(Old->getTemplateLoc(), diag::note_template_prev_declaration) | |||
7252 | << (Kind != Sema::TPL_TemplateMatch) | |||
7253 | << SourceRange(Old->getTemplateLoc(), Old->getRAngleLoc()); | |||
7254 | } | |||
7255 | ||||
7256 | /// Determine whether the given template parameter lists are | |||
7257 | /// equivalent. | |||
7258 | /// | |||
7259 | /// \param New The new template parameter list, typically written in the | |||
7260 | /// source code as part of a new template declaration. | |||
7261 | /// | |||
7262 | /// \param Old The old template parameter list, typically found via | |||
7263 | /// name lookup of the template declared with this template parameter | |||
7264 | /// list. | |||
7265 | /// | |||
7266 | /// \param Complain If true, this routine will produce a diagnostic if | |||
7267 | /// the template parameter lists are not equivalent. | |||
7268 | /// | |||
7269 | /// \param Kind describes how we are to match the template parameter lists. | |||
7270 | /// | |||
7271 | /// \param TemplateArgLoc If this source location is valid, then we | |||
7272 | /// are actually checking the template parameter list of a template | |||
7273 | /// argument (New) against the template parameter list of its | |||
7274 | /// corresponding template template parameter (Old). We produce | |||
7275 | /// slightly different diagnostics in this scenario. | |||
7276 | /// | |||
7277 | /// \returns True if the template parameter lists are equal, false | |||
7278 | /// otherwise. | |||
7279 | bool | |||
7280 | Sema::TemplateParameterListsAreEqual(TemplateParameterList *New, | |||
7281 | TemplateParameterList *Old, | |||
7282 | bool Complain, | |||
7283 | TemplateParameterListEqualKind Kind, | |||
7284 | SourceLocation TemplateArgLoc) { | |||
7285 | if (Old->size() != New->size() && Kind != TPL_TemplateTemplateArgumentMatch) { | |||
7286 | if (Complain) | |||
7287 | DiagnoseTemplateParameterListArityMismatch(*this, New, Old, Kind, | |||
7288 | TemplateArgLoc); | |||
7289 | ||||
7290 | return false; | |||
7291 | } | |||
7292 | ||||
7293 | // C++0x [temp.arg.template]p3: | |||
7294 | // A template-argument matches a template template-parameter (call it P) | |||
7295 | // when each of the template parameters in the template-parameter-list of | |||
7296 | // the template-argument's corresponding class template or alias template | |||
7297 | // (call it A) matches the corresponding template parameter in the | |||
7298 | // template-parameter-list of P. [...] | |||
7299 | TemplateParameterList::iterator NewParm = New->begin(); | |||
7300 | TemplateParameterList::iterator NewParmEnd = New->end(); | |||
7301 | for (TemplateParameterList::iterator OldParm = Old->begin(), | |||
7302 | OldParmEnd = Old->end(); | |||
7303 | OldParm != OldParmEnd; ++OldParm) { | |||
7304 | if (Kind != TPL_TemplateTemplateArgumentMatch || | |||
7305 | !(*OldParm)->isTemplateParameterPack()) { | |||
7306 | if (NewParm == NewParmEnd) { | |||
7307 | if (Complain) | |||
7308 | DiagnoseTemplateParameterListArityMismatch(*this, New, Old, Kind, | |||
7309 | TemplateArgLoc); | |||
7310 | ||||
7311 | return false; | |||
7312 | } | |||
7313 | ||||
7314 | if (!MatchTemplateParameterKind(*this, *NewParm, *OldParm, Complain, | |||
7315 | Kind, TemplateArgLoc)) | |||
7316 | return false; | |||
7317 | ||||
7318 | ++NewParm; | |||
7319 | continue; | |||
7320 | } | |||
7321 | ||||
7322 | // C++0x [temp.arg.template]p3: | |||
7323 | // [...] When P's template- parameter-list contains a template parameter | |||
7324 | // pack (14.5.3), the template parameter pack will match zero or more | |||
7325 | // template parameters or template parameter packs in the | |||
7326 | // template-parameter-list of A with the same type and form as the | |||
7327 | // template parameter pack in P (ignoring whether those template | |||
7328 | // parameters are template parameter packs). | |||
7329 | for (; NewParm != NewParmEnd; ++NewParm) { | |||
7330 | if (!MatchTemplateParameterKind(*this, *NewParm, *OldParm, Complain, | |||
7331 | Kind, TemplateArgLoc)) | |||
7332 | return false; | |||
7333 | } | |||
7334 | } | |||
7335 | ||||
7336 | // Make sure we exhausted all of the arguments. | |||
7337 | if (NewParm != NewParmEnd) { | |||
7338 | if (Complain) | |||
7339 | DiagnoseTemplateParameterListArityMismatch(*this, New, Old, Kind, | |||
7340 | TemplateArgLoc); | |||
7341 | ||||
7342 | return false; | |||
7343 | } | |||
7344 | ||||
7345 | return true; | |||
7346 | } | |||
7347 | ||||
7348 | /// Check whether a template can be declared within this scope. | |||
7349 | /// | |||
7350 | /// If the template declaration is valid in this scope, returns | |||
7351 | /// false. Otherwise, issues a diagnostic and returns true. | |||
7352 | bool | |||
7353 | Sema::CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams) { | |||
7354 | if (!S) | |||
7355 | return false; | |||
7356 | ||||
7357 | // Find the nearest enclosing declaration scope. | |||
7358 | while ((S->getFlags() & Scope::DeclScope) == 0 || | |||
7359 | (S->getFlags() & Scope::TemplateParamScope) != 0) | |||
7360 | S = S->getParent(); | |||
7361 | ||||
7362 | // C++ [temp]p4: | |||
7363 | // A template [...] shall not have C linkage. | |||
7364 | DeclContext *Ctx = S->getEntity(); | |||
7365 | if (Ctx && Ctx->isExternCContext()) { | |||
7366 | Diag(TemplateParams->getTemplateLoc(), diag::err_template_linkage) | |||
7367 | << TemplateParams->getSourceRange(); | |||
7368 | if (const LinkageSpecDecl *LSD = Ctx->getExternCContext()) | |||
7369 | Diag(LSD->getExternLoc(), diag::note_extern_c_begins_here); | |||
7370 | return true; | |||
7371 | } | |||
7372 | Ctx = Ctx->getRedeclContext(); | |||
7373 | ||||
7374 | // C++ [temp]p2: | |||
7375 | // A template-declaration can appear only as a namespace scope or | |||
7376 | // class scope declaration. | |||
7377 | if (Ctx) { | |||
7378 | if (Ctx->isFileContext()) | |||
7379 | return false; | |||
7380 | if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(Ctx)) { | |||
7381 | // C++ [temp.mem]p2: | |||
7382 | // A local class shall not have member templates. | |||
7383 | if (RD->isLocalClass()) | |||
7384 | return Diag(TemplateParams->getTemplateLoc(), | |||
7385 | diag::err_template_inside_local_class) | |||
7386 | << TemplateParams->getSourceRange(); | |||
7387 | else | |||
7388 | return false; | |||
7389 | } | |||
7390 | } | |||
7391 | ||||
7392 | return Diag(TemplateParams->getTemplateLoc(), | |||
7393 | diag::err_template_outside_namespace_or_class_scope) | |||
7394 | << TemplateParams->getSourceRange(); | |||
7395 | } | |||
7396 | ||||
7397 | /// Determine what kind of template specialization the given declaration | |||
7398 | /// is. | |||
7399 | static TemplateSpecializationKind getTemplateSpecializationKind(Decl *D) { | |||
7400 | if (!D) | |||
7401 | return TSK_Undeclared; | |||
7402 | ||||
7403 | if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(D)) | |||
7404 | return Record->getTemplateSpecializationKind(); | |||
7405 | if (FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) | |||
7406 | return Function->getTemplateSpecializationKind(); | |||
7407 | if (VarDecl *Var = dyn_cast<VarDecl>(D)) | |||
7408 | return Var->getTemplateSpecializationKind(); | |||
7409 | ||||
7410 | return TSK_Undeclared; | |||
7411 | } | |||
7412 | ||||
7413 | /// Check whether a specialization is well-formed in the current | |||
7414 | /// context. | |||
7415 | /// | |||
7416 | /// This routine determines whether a template specialization can be declared | |||
7417 | /// in the current context (C++ [temp.expl.spec]p2). | |||
7418 | /// | |||
7419 | /// \param S the semantic analysis object for which this check is being | |||
7420 | /// performed. | |||
7421 | /// | |||
7422 | /// \param Specialized the entity being specialized or instantiated, which | |||
7423 | /// may be a kind of template (class template, function template, etc.) or | |||
7424 | /// a member of a class template (member function, static data member, | |||
7425 | /// member class). | |||
7426 | /// | |||
7427 | /// \param PrevDecl the previous declaration of this entity, if any. | |||
7428 | /// | |||
7429 | /// \param Loc the location of the explicit specialization or instantiation of | |||
7430 | /// this entity. | |||
7431 | /// | |||
7432 | /// \param IsPartialSpecialization whether this is a partial specialization of | |||
7433 | /// a class template. | |||
7434 | /// | |||
7435 | /// \returns true if there was an error that we cannot recover from, false | |||
7436 | /// otherwise. | |||
7437 | static bool CheckTemplateSpecializationScope(Sema &S, | |||
7438 | NamedDecl *Specialized, | |||
7439 | NamedDecl *PrevDecl, | |||
7440 | SourceLocation Loc, | |||
7441 | bool IsPartialSpecialization) { | |||
7442 | // Keep these "kind" numbers in sync with the %select statements in the | |||
7443 | // various diagnostics emitted by this routine. | |||
7444 | int EntityKind = 0; | |||
7445 | if (isa<ClassTemplateDecl>(Specialized)) | |||
7446 | EntityKind = IsPartialSpecialization? 1 : 0; | |||
7447 | else if (isa<VarTemplateDecl>(Specialized)) | |||
7448 | EntityKind = IsPartialSpecialization ? 3 : 2; | |||
7449 | else if (isa<FunctionTemplateDecl>(Specialized)) | |||
7450 | EntityKind = 4; | |||
7451 | else if (isa<CXXMethodDecl>(Specialized)) | |||
7452 | EntityKind = 5; | |||
7453 | else if (isa<VarDecl>(Specialized)) | |||
7454 | EntityKind = 6; | |||
7455 | else if (isa<RecordDecl>(Specialized)) | |||
7456 | EntityKind = 7; | |||
7457 | else if (isa<EnumDecl>(Specialized) && S.getLangOpts().CPlusPlus11) | |||
7458 | EntityKind = 8; | |||
7459 | else { | |||
7460 | S.Diag(Loc, diag::err_template_spec_unknown_kind) | |||
7461 | << S.getLangOpts().CPlusPlus11; | |||
7462 | S.Diag(Specialized->getLocation(), diag::note_specialized_entity); | |||
7463 | return true; | |||
7464 | } | |||
7465 | ||||
7466 | // C++ [temp.expl.spec]p2: | |||
7467 | // An explicit specialization may be declared in any scope in which | |||
7468 | // the corresponding primary template may be defined. | |||
7469 | if (S.CurContext->getRedeclContext()->isFunctionOrMethod()) { | |||
7470 | S.Diag(Loc, diag::err_template_spec_decl_function_scope) | |||
7471 | << Specialized; | |||
7472 | return true; | |||
7473 | } | |||
7474 | ||||
7475 | // C++ [temp.class.spec]p6: | |||
7476 | // A class template partial specialization may be declared in any | |||
7477 | // scope in which the primary template may be defined. | |||
7478 | DeclContext *SpecializedContext = | |||
7479 | Specialized->getDeclContext()->getRedeclContext(); | |||
7480 | DeclContext *DC = S.CurContext->getRedeclContext(); | |||
7481 | ||||
7482 | // Make sure that this redeclaration (or definition) occurs in the same | |||
7483 | // scope or an enclosing namespace. | |||
7484 | if (!(DC->isFileContext() ? DC->Encloses(SpecializedContext) | |||
7485 | : DC->Equals(SpecializedContext))) { | |||
7486 | if (isa<TranslationUnitDecl>(SpecializedContext)) | |||
7487 | S.Diag(Loc, diag::err_template_spec_redecl_global_scope) | |||
7488 | << EntityKind << Specialized; | |||
7489 | else { | |||
7490 | auto *ND = cast<NamedDecl>(SpecializedContext); | |||
7491 | int Diag = diag::err_template_spec_redecl_out_of_scope; | |||
7492 | if (S.getLangOpts().MicrosoftExt && !DC->isRecord()) | |||
7493 | Diag = diag::ext_ms_template_spec_redecl_out_of_scope; | |||
7494 | S.Diag(Loc, Diag) << EntityKind << Specialized | |||
7495 | << ND << isa<CXXRecordDecl>(ND); | |||
7496 | } | |||
7497 | ||||
7498 | S.Diag(Specialized->getLocation(), diag::note_specialized_entity); | |||
7499 | ||||
7500 | // Don't allow specializing in the wrong class during error recovery. | |||
7501 | // Otherwise, things can go horribly wrong. | |||
7502 | if (DC->isRecord()) | |||
7503 | return true; | |||
7504 | } | |||
7505 | ||||
7506 | return false; | |||
7507 | } | |||
7508 | ||||
7509 | static SourceRange findTemplateParameterInType(unsigned Depth, Expr *E) { | |||
7510 | if (!E->isTypeDependent()) | |||
7511 | return SourceLocation(); | |||
7512 | DependencyChecker Checker(Depth, /*IgnoreNonTypeDependent*/true); | |||
7513 | Checker.TraverseStmt(E); | |||
7514 | if (Checker.MatchLoc.isInvalid()) | |||
7515 | return E->getSourceRange(); | |||
7516 | return Checker.MatchLoc; | |||
7517 | } | |||
7518 | ||||
7519 | static SourceRange findTemplateParameter(unsigned Depth, TypeLoc TL) { | |||
7520 | if (!TL.getType()->isDependentType()) | |||
7521 | return SourceLocation(); | |||
7522 | DependencyChecker Checker(Depth, /*IgnoreNonTypeDependent*/true); | |||
7523 | Checker.TraverseTypeLoc(TL); | |||
7524 | if (Checker.MatchLoc.isInvalid()) | |||
7525 | return TL.getSourceRange(); | |||
7526 | return Checker.MatchLoc; | |||
7527 | } | |||
7528 | ||||
7529 | /// Subroutine of Sema::CheckTemplatePartialSpecializationArgs | |||
7530 | /// that checks non-type template partial specialization arguments. | |||
7531 | static bool CheckNonTypeTemplatePartialSpecializationArgs( | |||
7532 | Sema &S, SourceLocation TemplateNameLoc, NonTypeTemplateParmDecl *Param, | |||
7533 | const TemplateArgument *Args, unsigned NumArgs, bool IsDefaultArgument) { | |||
7534 | for (unsigned I = 0; I != NumArgs; ++I) { | |||
7535 | if (Args[I].getKind() == TemplateArgument::Pack) { | |||
7536 | if (CheckNonTypeTemplatePartialSpecializationArgs( | |||
7537 | S, TemplateNameLoc, Param, Args[I].pack_begin(), | |||
7538 | Args[I].pack_size(), IsDefaultArgument)) | |||
7539 | return true; | |||
7540 | ||||
7541 | continue; | |||
7542 | } | |||
7543 | ||||
7544 | if (Args[I].getKind() != TemplateArgument::Expression) | |||
7545 | continue; | |||
7546 | ||||
7547 | Expr *ArgExpr = Args[I].getAsExpr(); | |||
7548 | ||||
7549 | // We can have a pack expansion of any of the bullets below. | |||
7550 | if (PackExpansionExpr *Expansion = dyn_cast<PackExpansionExpr>(ArgExpr)) | |||
7551 | ArgExpr = Expansion->getPattern(); | |||
7552 | ||||
7553 | // Strip off any implicit casts we added as part of type checking. | |||
7554 | while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(ArgExpr)) | |||
7555 | ArgExpr = ICE->getSubExpr(); | |||
7556 | ||||
7557 | // C++ [temp.class.spec]p8: | |||
7558 | // A non-type argument is non-specialized if it is the name of a | |||
7559 | // non-type parameter. All other non-type arguments are | |||
7560 | // specialized. | |||
7561 | // | |||
7562 | // Below, we check the two conditions that only apply to | |||
7563 | // specialized non-type arguments, so skip any non-specialized | |||
7564 | // arguments. | |||
7565 | if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ArgExpr)) | |||
7566 | if (isa<NonTypeTemplateParmDecl>(DRE->getDecl())) | |||
7567 | continue; | |||
7568 | ||||
7569 | // C++ [temp.class.spec]p9: | |||
7570 | // Within the argument list of a class template partial | |||
7571 | // specialization, the following restrictions apply: | |||
7572 | // -- A partially specialized non-type argument expression | |||
7573 | // shall not involve a template parameter of the partial | |||
7574 | // specialization except when the argument expression is a | |||
7575 | // simple identifier. | |||
7576 | // -- The type of a template parameter corresponding to a | |||
7577 | // specialized non-type argument shall not be dependent on a | |||
7578 | // parameter of the specialization. | |||
7579 | // DR1315 removes the first bullet, leaving an incoherent set of rules. | |||
7580 | // We implement a compromise between the original rules and DR1315: | |||
7581 | // -- A specialized non-type template argument shall not be | |||
7582 | // type-dependent and the corresponding template parameter | |||
7583 | // shall have a non-dependent type. | |||
7584 | SourceRange ParamUseRange = | |||
7585 | findTemplateParameterInType(Param->getDepth(), ArgExpr); | |||
7586 | if (ParamUseRange.isValid()) { | |||
7587 | if (IsDefaultArgument) { | |||
7588 | S.Diag(TemplateNameLoc, | |||
7589 | diag::err_dependent_non_type_arg_in_partial_spec); | |||
7590 | S.Diag(ParamUseRange.getBegin(), | |||
7591 | diag::note_dependent_non_type_default_arg_in_partial_spec) | |||
7592 | << ParamUseRange; | |||
7593 | } else { | |||
7594 | S.Diag(ParamUseRange.getBegin(), | |||
7595 | diag::err_dependent_non_type_arg_in_partial_spec) | |||
7596 | << ParamUseRange; | |||
7597 | } | |||
7598 | return true; | |||
7599 | } | |||
7600 | ||||
7601 | ParamUseRange = findTemplateParameter( | |||
7602 | Param->getDepth(), Param->getTypeSourceInfo()->getTypeLoc()); | |||
7603 | if (ParamUseRange.isValid()) { | |||
7604 | S.Diag(IsDefaultArgument ? TemplateNameLoc : ArgExpr->getBeginLoc(), | |||
7605 | diag::err_dependent_typed_non_type_arg_in_partial_spec) | |||
7606 | << Param->getType(); | |||
7607 | S.Diag(Param->getLocation(), diag::note_template_param_here) | |||
7608 | << (IsDefaultArgument ? ParamUseRange : SourceRange()) | |||
7609 | << ParamUseRange; | |||
7610 | return true; | |||
7611 | } | |||
7612 | } | |||
7613 | ||||
7614 | return false; | |||
7615 | } | |||
7616 | ||||
7617 | /// Check the non-type template arguments of a class template | |||
7618 | /// partial specialization according to C++ [temp.class.spec]p9. | |||
7619 | /// | |||
7620 | /// \param TemplateNameLoc the location of the template name. | |||
7621 | /// \param PrimaryTemplate the template parameters of the primary class | |||
7622 | /// template. | |||
7623 | /// \param NumExplicit the number of explicitly-specified template arguments. | |||
7624 | /// \param TemplateArgs the template arguments of the class template | |||
7625 | /// partial specialization. | |||
7626 | /// | |||
7627 | /// \returns \c true if there was an error, \c false otherwise. | |||
7628 | bool Sema::CheckTemplatePartialSpecializationArgs( | |||
7629 | SourceLocation TemplateNameLoc, TemplateDecl *PrimaryTemplate, | |||
7630 | unsigned NumExplicit, ArrayRef<TemplateArgument> TemplateArgs) { | |||
7631 | // We have to be conservative when checking a template in a dependent | |||
7632 | // context. | |||
7633 | if (PrimaryTemplate->getDeclContext()->isDependentContext()) | |||
7634 | return false; | |||
7635 | ||||
7636 | TemplateParameterList *TemplateParams = | |||
7637 | PrimaryTemplate->getTemplateParameters(); | |||
7638 | for (unsigned I = 0, N = TemplateParams->size(); I != N; ++I) { | |||
7639 | NonTypeTemplateParmDecl *Param | |||
7640 | = dyn_cast<NonTypeTemplateParmDecl>(TemplateParams->getParam(I)); | |||
7641 | if (!Param) | |||
7642 | continue; | |||
7643 | ||||
7644 | if (CheckNonTypeTemplatePartialSpecializationArgs(*this, TemplateNameLoc, | |||
7645 | Param, &TemplateArgs[I], | |||
7646 | 1, I >= NumExplicit)) | |||
7647 | return true; | |||
7648 | } | |||
7649 | ||||
7650 | return false; | |||
7651 | } | |||
7652 | ||||
7653 | DeclResult Sema::ActOnClassTemplateSpecialization( | |||
7654 | Scope *S, unsigned TagSpec, TagUseKind TUK, SourceLocation KWLoc, | |||
7655 | SourceLocation ModulePrivateLoc, TemplateIdAnnotation &TemplateId, | |||
7656 | const ParsedAttributesView &Attr, | |||
7657 | MultiTemplateParamsArg TemplateParameterLists, SkipBodyInfo *SkipBody) { | |||
7658 | assert(TUK != TUK_Reference && "References are not specializations")((TUK != TUK_Reference && "References are not specializations" ) ? static_cast<void> (0) : __assert_fail ("TUK != TUK_Reference && \"References are not specializations\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 7658, __PRETTY_FUNCTION__)); | |||
7659 | ||||
7660 | CXXScopeSpec &SS = TemplateId.SS; | |||
7661 | ||||
7662 | // NOTE: KWLoc is the location of the tag keyword. This will instead | |||
7663 | // store the location of the outermost template keyword in the declaration. | |||
7664 | SourceLocation TemplateKWLoc = TemplateParameterLists.size() > 0 | |||
7665 | ? TemplateParameterLists[0]->getTemplateLoc() : KWLoc; | |||
7666 | SourceLocation TemplateNameLoc = TemplateId.TemplateNameLoc; | |||
7667 | SourceLocation LAngleLoc = TemplateId.LAngleLoc; | |||
7668 | SourceLocation RAngleLoc = TemplateId.RAngleLoc; | |||
7669 | ||||
7670 | // Find the class template we're specializing | |||
7671 | TemplateName Name = TemplateId.Template.get(); | |||
7672 | ClassTemplateDecl *ClassTemplate | |||
7673 | = dyn_cast_or_null<ClassTemplateDecl>(Name.getAsTemplateDecl()); | |||
7674 | ||||
7675 | if (!ClassTemplate) { | |||
7676 | Diag(TemplateNameLoc, diag::err_not_class_template_specialization) | |||
7677 | << (Name.getAsTemplateDecl() && | |||
7678 | isa<TemplateTemplateParmDecl>(Name.getAsTemplateDecl())); | |||
7679 | return true; | |||
7680 | } | |||
7681 | ||||
7682 | bool isMemberSpecialization = false; | |||
7683 | bool isPartialSpecialization = false; | |||
7684 | ||||
7685 | // Check the validity of the template headers that introduce this | |||
7686 | // template. | |||
7687 | // FIXME: We probably shouldn't complain about these headers for | |||
7688 | // friend declarations. | |||
7689 | bool Invalid = false; | |||
7690 | TemplateParameterList *TemplateParams = | |||
7691 | MatchTemplateParametersToScopeSpecifier( | |||
7692 | KWLoc, TemplateNameLoc, SS, &TemplateId, | |||
7693 | TemplateParameterLists, TUK == TUK_Friend, isMemberSpecialization, | |||
7694 | Invalid); | |||
7695 | if (Invalid) | |||
7696 | return true; | |||
7697 | ||||
7698 | if (TemplateParams && TemplateParams->size() > 0) { | |||
7699 | isPartialSpecialization = true; | |||
7700 | ||||
7701 | if (TUK == TUK_Friend) { | |||
7702 | Diag(KWLoc, diag::err_partial_specialization_friend) | |||
7703 | << SourceRange(LAngleLoc, RAngleLoc); | |||
7704 | return true; | |||
7705 | } | |||
7706 | ||||
7707 | // C++ [temp.class.spec]p10: | |||
7708 | // The template parameter list of a specialization shall not | |||
7709 | // contain default template argument values. | |||
7710 | for (unsigned I = 0, N = TemplateParams->size(); I != N; ++I) { | |||
7711 | Decl *Param = TemplateParams->getParam(I); | |||
7712 | if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(Param)) { | |||
7713 | if (TTP->hasDefaultArgument()) { | |||
7714 | Diag(TTP->getDefaultArgumentLoc(), | |||
7715 | diag::err_default_arg_in_partial_spec); | |||
7716 | TTP->removeDefaultArgument(); | |||
7717 | } | |||
7718 | } else if (NonTypeTemplateParmDecl *NTTP | |||
7719 | = dyn_cast<NonTypeTemplateParmDecl>(Param)) { | |||
7720 | if (Expr *DefArg = NTTP->getDefaultArgument()) { | |||
7721 | Diag(NTTP->getDefaultArgumentLoc(), | |||
7722 | diag::err_default_arg_in_partial_spec) | |||
7723 | << DefArg->getSourceRange(); | |||
7724 | NTTP->removeDefaultArgument(); | |||
7725 | } | |||
7726 | } else { | |||
7727 | TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(Param); | |||
7728 | if (TTP->hasDefaultArgument()) { | |||
7729 | Diag(TTP->getDefaultArgument().getLocation(), | |||
7730 | diag::err_default_arg_in_partial_spec) | |||
7731 | << TTP->getDefaultArgument().getSourceRange(); | |||
7732 | TTP->removeDefaultArgument(); | |||
7733 | } | |||
7734 | } | |||
7735 | } | |||
7736 | } else if (TemplateParams) { | |||
7737 | if (TUK == TUK_Friend) | |||
7738 | Diag(KWLoc, diag::err_template_spec_friend) | |||
7739 | << FixItHint::CreateRemoval( | |||
7740 | SourceRange(TemplateParams->getTemplateLoc(), | |||
7741 | TemplateParams->getRAngleLoc())) | |||
7742 | << SourceRange(LAngleLoc, RAngleLoc); | |||
7743 | } else { | |||
7744 | assert(TUK == TUK_Friend && "should have a 'template<>' for this decl")((TUK == TUK_Friend && "should have a 'template<>' for this decl" ) ? static_cast<void> (0) : __assert_fail ("TUK == TUK_Friend && \"should have a 'template<>' for this decl\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 7744, __PRETTY_FUNCTION__)); | |||
7745 | } | |||
7746 | ||||
7747 | // Check that the specialization uses the same tag kind as the | |||
7748 | // original template. | |||
7749 | TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec); | |||
7750 | assert(Kind != TTK_Enum && "Invalid enum tag in class template spec!")((Kind != TTK_Enum && "Invalid enum tag in class template spec!" ) ? static_cast<void> (0) : __assert_fail ("Kind != TTK_Enum && \"Invalid enum tag in class template spec!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 7750, __PRETTY_FUNCTION__)); | |||
7751 | if (!isAcceptableTagRedeclaration(ClassTemplate->getTemplatedDecl(), | |||
7752 | Kind, TUK == TUK_Definition, KWLoc, | |||
7753 | ClassTemplate->getIdentifier())) { | |||
7754 | Diag(KWLoc, diag::err_use_with_wrong_tag) | |||
7755 | << ClassTemplate | |||
7756 | << FixItHint::CreateReplacement(KWLoc, | |||
7757 | ClassTemplate->getTemplatedDecl()->getKindName()); | |||
7758 | Diag(ClassTemplate->getTemplatedDecl()->getLocation(), | |||
7759 | diag::note_previous_use); | |||
7760 | Kind = ClassTemplate->getTemplatedDecl()->getTagKind(); | |||
7761 | } | |||
7762 | ||||
7763 | // Translate the parser's template argument list in our AST format. | |||
7764 | TemplateArgumentListInfo TemplateArgs = | |||
7765 | makeTemplateArgumentListInfo(*this, TemplateId); | |||
7766 | ||||
7767 | // Check for unexpanded parameter packs in any of the template arguments. | |||
7768 | for (unsigned I = 0, N = TemplateArgs.size(); I != N; ++I) | |||
7769 | if (DiagnoseUnexpandedParameterPack(TemplateArgs[I], | |||
7770 | UPPC_PartialSpecialization)) | |||
7771 | return true; | |||
7772 | ||||
7773 | // Check that the template argument list is well-formed for this | |||
7774 | // template. | |||
7775 | SmallVector<TemplateArgument, 4> Converted; | |||
7776 | if (CheckTemplateArgumentList(ClassTemplate, TemplateNameLoc, | |||
7777 | TemplateArgs, false, Converted)) | |||
7778 | return true; | |||
7779 | ||||
7780 | // Find the class template (partial) specialization declaration that | |||
7781 | // corresponds to these arguments. | |||
7782 | if (isPartialSpecialization) { | |||
7783 | if (CheckTemplatePartialSpecializationArgs(TemplateNameLoc, ClassTemplate, | |||
7784 | TemplateArgs.size(), Converted)) | |||
7785 | return true; | |||
7786 | ||||
7787 | // FIXME: Move this to CheckTemplatePartialSpecializationArgs so we | |||
7788 | // also do it during instantiation. | |||
7789 | bool InstantiationDependent; | |||
7790 | if (!Name.isDependent() && | |||
7791 | !TemplateSpecializationType::anyDependentTemplateArguments( | |||
7792 | TemplateArgs.arguments(), InstantiationDependent)) { | |||
7793 | Diag(TemplateNameLoc, diag::err_partial_spec_fully_specialized) | |||
7794 | << ClassTemplate->getDeclName(); | |||
7795 | isPartialSpecialization = false; | |||
7796 | } | |||
7797 | } | |||
7798 | ||||
7799 | void *InsertPos = nullptr; | |||
7800 | ClassTemplateSpecializationDecl *PrevDecl = nullptr; | |||
7801 | ||||
7802 | if (isPartialSpecialization) | |||
7803 | // FIXME: Template parameter list matters, too | |||
7804 | PrevDecl = ClassTemplate->findPartialSpecialization(Converted, InsertPos); | |||
7805 | else | |||
7806 | PrevDecl = ClassTemplate->findSpecialization(Converted, InsertPos); | |||
7807 | ||||
7808 | ClassTemplateSpecializationDecl *Specialization = nullptr; | |||
7809 | ||||
7810 | // Check whether we can declare a class template specialization in | |||
7811 | // the current scope. | |||
7812 | if (TUK != TUK_Friend && | |||
7813 | CheckTemplateSpecializationScope(*this, ClassTemplate, PrevDecl, | |||
7814 | TemplateNameLoc, | |||
7815 | isPartialSpecialization)) | |||
7816 | return true; | |||
7817 | ||||
7818 | // The canonical type | |||
7819 | QualType CanonType; | |||
7820 | if (isPartialSpecialization) { | |||
7821 | // Build the canonical type that describes the converted template | |||
7822 | // arguments of the class template partial specialization. | |||
7823 | TemplateName CanonTemplate = Context.getCanonicalTemplateName(Name); | |||
7824 | CanonType = Context.getTemplateSpecializationType(CanonTemplate, | |||
7825 | Converted); | |||
7826 | ||||
7827 | if (Context.hasSameType(CanonType, | |||
7828 | ClassTemplate->getInjectedClassNameSpecialization())) { | |||
7829 | // C++ [temp.class.spec]p9b3: | |||
7830 | // | |||
7831 | // -- The argument list of the specialization shall not be identical | |||
7832 | // to the implicit argument list of the primary template. | |||
7833 | // | |||
7834 | // This rule has since been removed, because it's redundant given DR1495, | |||
7835 | // but we keep it because it produces better diagnostics and recovery. | |||
7836 | Diag(TemplateNameLoc, diag::err_partial_spec_args_match_primary_template) | |||
7837 | << /*class template*/0 << (TUK == TUK_Definition) | |||
7838 | << FixItHint::CreateRemoval(SourceRange(LAngleLoc, RAngleLoc)); | |||
7839 | return CheckClassTemplate(S, TagSpec, TUK, KWLoc, SS, | |||
7840 | ClassTemplate->getIdentifier(), | |||
7841 | TemplateNameLoc, | |||
7842 | Attr, | |||
7843 | TemplateParams, | |||
7844 | AS_none, /*ModulePrivateLoc=*/SourceLocation(), | |||
7845 | /*FriendLoc*/SourceLocation(), | |||
7846 | TemplateParameterLists.size() - 1, | |||
7847 | TemplateParameterLists.data()); | |||
7848 | } | |||
7849 | ||||
7850 | // Create a new class template partial specialization declaration node. | |||
7851 | ClassTemplatePartialSpecializationDecl *PrevPartial | |||
7852 | = cast_or_null<ClassTemplatePartialSpecializationDecl>(PrevDecl); | |||
7853 | ClassTemplatePartialSpecializationDecl *Partial | |||
7854 | = ClassTemplatePartialSpecializationDecl::Create(Context, Kind, | |||
7855 | ClassTemplate->getDeclContext(), | |||
7856 | KWLoc, TemplateNameLoc, | |||
7857 | TemplateParams, | |||
7858 | ClassTemplate, | |||
7859 | Converted, | |||
7860 | TemplateArgs, | |||
7861 | CanonType, | |||
7862 | PrevPartial); | |||
7863 | SetNestedNameSpecifier(*this, Partial, SS); | |||
7864 | if (TemplateParameterLists.size() > 1 && SS.isSet()) { | |||
7865 | Partial->setTemplateParameterListsInfo( | |||
7866 | Context, TemplateParameterLists.drop_back(1)); | |||
7867 | } | |||
7868 | ||||
7869 | if (!PrevPartial) | |||
7870 | ClassTemplate->AddPartialSpecialization(Partial, InsertPos); | |||
7871 | Specialization = Partial; | |||
7872 | ||||
7873 | // If we are providing an explicit specialization of a member class | |||
7874 | // template specialization, make a note of that. | |||
7875 | if (PrevPartial && PrevPartial->getInstantiatedFromMember()) | |||
7876 | PrevPartial->setMemberSpecialization(); | |||
7877 | ||||
7878 | CheckTemplatePartialSpecialization(Partial); | |||
7879 | } else { | |||
7880 | // Create a new class template specialization declaration node for | |||
7881 | // this explicit specialization or friend declaration. | |||
7882 | Specialization | |||
7883 | = ClassTemplateSpecializationDecl::Create(Context, Kind, | |||
7884 | ClassTemplate->getDeclContext(), | |||
7885 | KWLoc, TemplateNameLoc, | |||
7886 | ClassTemplate, | |||
7887 | Converted, | |||
7888 | PrevDecl); | |||
7889 | SetNestedNameSpecifier(*this, Specialization, SS); | |||
7890 | if (TemplateParameterLists.size() > 0) { | |||
7891 | Specialization->setTemplateParameterListsInfo(Context, | |||
7892 | TemplateParameterLists); | |||
7893 | } | |||
7894 | ||||
7895 | if (!PrevDecl) | |||
7896 | ClassTemplate->AddSpecialization(Specialization, InsertPos); | |||
7897 | ||||
7898 | if (CurContext->isDependentContext()) { | |||
7899 | TemplateName CanonTemplate = Context.getCanonicalTemplateName(Name); | |||
7900 | CanonType = Context.getTemplateSpecializationType( | |||
7901 | CanonTemplate, Converted); | |||
7902 | } else { | |||
7903 | CanonType = Context.getTypeDeclType(Specialization); | |||
7904 | } | |||
7905 | } | |||
7906 | ||||
7907 | // C++ [temp.expl.spec]p6: | |||
7908 | // If a template, a member template or the member of a class template is | |||
7909 | // explicitly specialized then that specialization shall be declared | |||
7910 | // before the first use of that specialization that would cause an implicit | |||
7911 | // instantiation to take place, in every translation unit in which such a | |||
7912 | // use occurs; no diagnostic is required. | |||
7913 | if (PrevDecl && PrevDecl->getPointOfInstantiation().isValid()) { | |||
7914 | bool Okay = false; | |||
7915 | for (Decl *Prev = PrevDecl; Prev; Prev = Prev->getPreviousDecl()) { | |||
7916 | // Is there any previous explicit specialization declaration? | |||
7917 | if (getTemplateSpecializationKind(Prev) == TSK_ExplicitSpecialization) { | |||
7918 | Okay = true; | |||
7919 | break; | |||
7920 | } | |||
7921 | } | |||
7922 | ||||
7923 | if (!Okay) { | |||
7924 | SourceRange Range(TemplateNameLoc, RAngleLoc); | |||
7925 | Diag(TemplateNameLoc, diag::err_specialization_after_instantiation) | |||
7926 | << Context.getTypeDeclType(Specialization) << Range; | |||
7927 | ||||
7928 | Diag(PrevDecl->getPointOfInstantiation(), | |||
7929 | diag::note_instantiation_required_here) | |||
7930 | << (PrevDecl->getTemplateSpecializationKind() | |||
7931 | != TSK_ImplicitInstantiation); | |||
7932 | return true; | |||
7933 | } | |||
7934 | } | |||
7935 | ||||
7936 | // If this is not a friend, note that this is an explicit specialization. | |||
7937 | if (TUK != TUK_Friend) | |||
7938 | Specialization->setSpecializationKind(TSK_ExplicitSpecialization); | |||
7939 | ||||
7940 | // Check that this isn't a redefinition of this specialization. | |||
7941 | if (TUK == TUK_Definition) { | |||
7942 | RecordDecl *Def = Specialization->getDefinition(); | |||
7943 | NamedDecl *Hidden = nullptr; | |||
7944 | if (Def && SkipBody && !hasVisibleDefinition(Def, &Hidden)) { | |||
7945 | SkipBody->ShouldSkip = true; | |||
7946 | SkipBody->Previous = Def; | |||
7947 | makeMergedDefinitionVisible(Hidden); | |||
7948 | } else if (Def) { | |||
7949 | SourceRange Range(TemplateNameLoc, RAngleLoc); | |||
7950 | Diag(TemplateNameLoc, diag::err_redefinition) << Specialization << Range; | |||
7951 | Diag(Def->getLocation(), diag::note_previous_definition); | |||
7952 | Specialization->setInvalidDecl(); | |||
7953 | return true; | |||
7954 | } | |||
7955 | } | |||
7956 | ||||
7957 | ProcessDeclAttributeList(S, Specialization, Attr); | |||
7958 | ||||
7959 | // Add alignment attributes if necessary; these attributes are checked when | |||
7960 | // the ASTContext lays out the structure. | |||
7961 | if (TUK == TUK_Definition && (!SkipBody || !SkipBody->ShouldSkip)) { | |||
7962 | AddAlignmentAttributesForRecord(Specialization); | |||
7963 | AddMsStructLayoutForRecord(Specialization); | |||
7964 | } | |||
7965 | ||||
7966 | if (ModulePrivateLoc.isValid()) | |||
7967 | Diag(Specialization->getLocation(), diag::err_module_private_specialization) | |||
7968 | << (isPartialSpecialization? 1 : 0) | |||
7969 | << FixItHint::CreateRemoval(ModulePrivateLoc); | |||
7970 | ||||
7971 | // Build the fully-sugared type for this class template | |||
7972 | // specialization as the user wrote in the specialization | |||
7973 | // itself. This means that we'll pretty-print the type retrieved | |||
7974 | // from the specialization's declaration the way that the user | |||
7975 | // actually wrote the specialization, rather than formatting the | |||
7976 | // name based on the "canonical" representation used to store the | |||
7977 | // template arguments in the specialization. | |||
7978 | TypeSourceInfo *WrittenTy | |||
7979 | = Context.getTemplateSpecializationTypeInfo(Name, TemplateNameLoc, | |||
7980 | TemplateArgs, CanonType); | |||
7981 | if (TUK != TUK_Friend) { | |||
7982 | Specialization->setTypeAsWritten(WrittenTy); | |||
7983 | Specialization->setTemplateKeywordLoc(TemplateKWLoc); | |||
7984 | } | |||
7985 | ||||
7986 | // C++ [temp.expl.spec]p9: | |||
7987 | // A template explicit specialization is in the scope of the | |||
7988 | // namespace in which the template was defined. | |||
7989 | // | |||
7990 | // We actually implement this paragraph where we set the semantic | |||
7991 | // context (in the creation of the ClassTemplateSpecializationDecl), | |||
7992 | // but we also maintain the lexical context where the actual | |||
7993 | // definition occurs. | |||
7994 | Specialization->setLexicalDeclContext(CurContext); | |||
7995 | ||||
7996 | // We may be starting the definition of this specialization. | |||
7997 | if (TUK == TUK_Definition && (!SkipBody || !SkipBody->ShouldSkip)) | |||
7998 | Specialization->startDefinition(); | |||
7999 | ||||
8000 | if (TUK == TUK_Friend) { | |||
8001 | FriendDecl *Friend = FriendDecl::Create(Context, CurContext, | |||
8002 | TemplateNameLoc, | |||
8003 | WrittenTy, | |||
8004 | /*FIXME:*/KWLoc); | |||
8005 | Friend->setAccess(AS_public); | |||
8006 | CurContext->addDecl(Friend); | |||
8007 | } else { | |||
8008 | // Add the specialization into its lexical context, so that it can | |||
8009 | // be seen when iterating through the list of declarations in that | |||
8010 | // context. However, specializations are not found by name lookup. | |||
8011 | CurContext->addDecl(Specialization); | |||
8012 | } | |||
8013 | ||||
8014 | if (SkipBody && SkipBody->ShouldSkip) | |||
8015 | return SkipBody->Previous; | |||
8016 | ||||
8017 | return Specialization; | |||
8018 | } | |||
8019 | ||||
8020 | Decl *Sema::ActOnTemplateDeclarator(Scope *S, | |||
8021 | MultiTemplateParamsArg TemplateParameterLists, | |||
8022 | Declarator &D) { | |||
8023 | Decl *NewDecl = HandleDeclarator(S, D, TemplateParameterLists); | |||
8024 | ActOnDocumentableDecl(NewDecl); | |||
8025 | return NewDecl; | |||
8026 | } | |||
8027 | ||||
8028 | Decl *Sema::ActOnConceptDefinition(Scope *S, | |||
8029 | MultiTemplateParamsArg TemplateParameterLists, | |||
8030 | IdentifierInfo *Name, SourceLocation NameLoc, | |||
8031 | Expr *ConstraintExpr) { | |||
8032 | DeclContext *DC = CurContext; | |||
8033 | ||||
8034 | if (!DC->getRedeclContext()->isFileContext()) { | |||
8035 | Diag(NameLoc, | |||
8036 | diag::err_concept_decls_may_only_appear_in_global_namespace_scope); | |||
8037 | return nullptr; | |||
8038 | } | |||
8039 | ||||
8040 | if (TemplateParameterLists.size() > 1) { | |||
8041 | Diag(NameLoc, diag::err_concept_extra_headers); | |||
8042 | return nullptr; | |||
8043 | } | |||
8044 | ||||
8045 | if (TemplateParameterLists.front()->size() == 0) { | |||
8046 | Diag(NameLoc, diag::err_concept_no_parameters); | |||
8047 | return nullptr; | |||
8048 | } | |||
8049 | ||||
8050 | ConceptDecl *NewDecl = ConceptDecl::Create(Context, DC, NameLoc, Name, | |||
8051 | TemplateParameterLists.front(), | |||
8052 | ConstraintExpr); | |||
8053 | ||||
8054 | if (!ConstraintExpr->isTypeDependent() && | |||
8055 | ConstraintExpr->getType() != Context.BoolTy) { | |||
8056 | // C++2a [temp.constr.atomic]p3: | |||
8057 | // E shall be a constant expression of type bool. | |||
8058 | // TODO: Do this check for individual atomic constraints | |||
8059 | // and not the constraint expression. Probably should do it in | |||
8060 | // ParseConstraintExpression. | |||
8061 | Diag(ConstraintExpr->getSourceRange().getBegin(), | |||
8062 | diag::err_concept_initialized_with_non_bool_type) | |||
8063 | << ConstraintExpr->getType(); | |||
8064 | NewDecl->setInvalidDecl(); | |||
8065 | } | |||
8066 | ||||
8067 | if (NewDecl->getAssociatedConstraints()) { | |||
8068 | // C++2a [temp.concept]p4: | |||
8069 | // A concept shall not have associated constraints. | |||
8070 | // TODO: Make a test once we have actual associated constraints. | |||
8071 | Diag(NameLoc, diag::err_concept_no_associated_constraints); | |||
8072 | NewDecl->setInvalidDecl(); | |||
8073 | } | |||
8074 | ||||
8075 | // Check for conflicting previous declaration. | |||
8076 | DeclarationNameInfo NameInfo(NewDecl->getDeclName(), NameLoc); | |||
8077 | LookupResult Previous(*this, NameInfo, LookupOrdinaryName, | |||
8078 | ForVisibleRedeclaration); | |||
8079 | LookupName(Previous, S); | |||
8080 | ||||
8081 | FilterLookupForScope(Previous, DC, S, /*ConsiderLinkage=*/false, | |||
8082 | /*AllowInlineNamespace*/false); | |||
8083 | if (!Previous.empty()) { | |||
8084 | auto *Old = Previous.getRepresentativeDecl(); | |||
8085 | Diag(NameLoc, isa<ConceptDecl>(Old) ? diag::err_redefinition : | |||
8086 | diag::err_redefinition_different_kind) << NewDecl->getDeclName(); | |||
8087 | Diag(Old->getLocation(), diag::note_previous_definition); | |||
8088 | } | |||
8089 | ||||
8090 | ActOnDocumentableDecl(NewDecl); | |||
8091 | PushOnScopeChains(NewDecl, S); | |||
8092 | return NewDecl; | |||
8093 | } | |||
8094 | ||||
8095 | /// \brief Strips various properties off an implicit instantiation | |||
8096 | /// that has just been explicitly specialized. | |||
8097 | static void StripImplicitInstantiation(NamedDecl *D) { | |||
8098 | D->dropAttr<DLLImportAttr>(); | |||
8099 | D->dropAttr<DLLExportAttr>(); | |||
8100 | ||||
8101 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) | |||
8102 | FD->setInlineSpecified(false); | |||
8103 | } | |||
8104 | ||||
8105 | /// Compute the diagnostic location for an explicit instantiation | |||
8106 | // declaration or definition. | |||
8107 | static SourceLocation DiagLocForExplicitInstantiation( | |||
8108 | NamedDecl* D, SourceLocation PointOfInstantiation) { | |||
8109 | // Explicit instantiations following a specialization have no effect and | |||
8110 | // hence no PointOfInstantiation. In that case, walk decl backwards | |||
8111 | // until a valid name loc is found. | |||
8112 | SourceLocation PrevDiagLoc = PointOfInstantiation; | |||
8113 | for (Decl *Prev = D; Prev && !PrevDiagLoc.isValid(); | |||
8114 | Prev = Prev->getPreviousDecl()) { | |||
8115 | PrevDiagLoc = Prev->getLocation(); | |||
8116 | } | |||
8117 | assert(PrevDiagLoc.isValid() &&((PrevDiagLoc.isValid() && "Explicit instantiation without point of instantiation?" ) ? static_cast<void> (0) : __assert_fail ("PrevDiagLoc.isValid() && \"Explicit instantiation without point of instantiation?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8118, __PRETTY_FUNCTION__)) | |||
8118 | "Explicit instantiation without point of instantiation?")((PrevDiagLoc.isValid() && "Explicit instantiation without point of instantiation?" ) ? static_cast<void> (0) : __assert_fail ("PrevDiagLoc.isValid() && \"Explicit instantiation without point of instantiation?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8118, __PRETTY_FUNCTION__)); | |||
8119 | return PrevDiagLoc; | |||
8120 | } | |||
8121 | ||||
8122 | /// Diagnose cases where we have an explicit template specialization | |||
8123 | /// before/after an explicit template instantiation, producing diagnostics | |||
8124 | /// for those cases where they are required and determining whether the | |||
8125 | /// new specialization/instantiation will have any effect. | |||
8126 | /// | |||
8127 | /// \param NewLoc the location of the new explicit specialization or | |||
8128 | /// instantiation. | |||
8129 | /// | |||
8130 | /// \param NewTSK the kind of the new explicit specialization or instantiation. | |||
8131 | /// | |||
8132 | /// \param PrevDecl the previous declaration of the entity. | |||
8133 | /// | |||
8134 | /// \param PrevTSK the kind of the old explicit specialization or instantiatin. | |||
8135 | /// | |||
8136 | /// \param PrevPointOfInstantiation if valid, indicates where the previus | |||
8137 | /// declaration was instantiated (either implicitly or explicitly). | |||
8138 | /// | |||
8139 | /// \param HasNoEffect will be set to true to indicate that the new | |||
8140 | /// specialization or instantiation has no effect and should be ignored. | |||
8141 | /// | |||
8142 | /// \returns true if there was an error that should prevent the introduction of | |||
8143 | /// the new declaration into the AST, false otherwise. | |||
8144 | bool | |||
8145 | Sema::CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, | |||
8146 | TemplateSpecializationKind NewTSK, | |||
8147 | NamedDecl *PrevDecl, | |||
8148 | TemplateSpecializationKind PrevTSK, | |||
8149 | SourceLocation PrevPointOfInstantiation, | |||
8150 | bool &HasNoEffect) { | |||
8151 | HasNoEffect = false; | |||
8152 | ||||
8153 | switch (NewTSK) { | |||
8154 | case TSK_Undeclared: | |||
8155 | case TSK_ImplicitInstantiation: | |||
8156 | assert((((PrevTSK == TSK_Undeclared || PrevTSK == TSK_ImplicitInstantiation ) && "previous declaration must be implicit!") ? static_cast <void> (0) : __assert_fail ("(PrevTSK == TSK_Undeclared || PrevTSK == TSK_ImplicitInstantiation) && \"previous declaration must be implicit!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8158, __PRETTY_FUNCTION__)) | |||
8157 | (PrevTSK == TSK_Undeclared || PrevTSK == TSK_ImplicitInstantiation) &&(((PrevTSK == TSK_Undeclared || PrevTSK == TSK_ImplicitInstantiation ) && "previous declaration must be implicit!") ? static_cast <void> (0) : __assert_fail ("(PrevTSK == TSK_Undeclared || PrevTSK == TSK_ImplicitInstantiation) && \"previous declaration must be implicit!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8158, __PRETTY_FUNCTION__)) | |||
8158 | "previous declaration must be implicit!")(((PrevTSK == TSK_Undeclared || PrevTSK == TSK_ImplicitInstantiation ) && "previous declaration must be implicit!") ? static_cast <void> (0) : __assert_fail ("(PrevTSK == TSK_Undeclared || PrevTSK == TSK_ImplicitInstantiation) && \"previous declaration must be implicit!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8158, __PRETTY_FUNCTION__)); | |||
8159 | return false; | |||
8160 | ||||
8161 | case TSK_ExplicitSpecialization: | |||
8162 | switch (PrevTSK) { | |||
8163 | case TSK_Undeclared: | |||
8164 | case TSK_ExplicitSpecialization: | |||
8165 | // Okay, we're just specializing something that is either already | |||
8166 | // explicitly specialized or has merely been mentioned without any | |||
8167 | // instantiation. | |||
8168 | return false; | |||
8169 | ||||
8170 | case TSK_ImplicitInstantiation: | |||
8171 | if (PrevPointOfInstantiation.isInvalid()) { | |||
8172 | // The declaration itself has not actually been instantiated, so it is | |||
8173 | // still okay to specialize it. | |||
8174 | StripImplicitInstantiation(PrevDecl); | |||
8175 | return false; | |||
8176 | } | |||
8177 | // Fall through | |||
8178 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
8179 | ||||
8180 | case TSK_ExplicitInstantiationDeclaration: | |||
8181 | case TSK_ExplicitInstantiationDefinition: | |||
8182 | assert((PrevTSK == TSK_ImplicitInstantiation ||(((PrevTSK == TSK_ImplicitInstantiation || PrevPointOfInstantiation .isValid()) && "Explicit instantiation without point of instantiation?" ) ? static_cast<void> (0) : __assert_fail ("(PrevTSK == TSK_ImplicitInstantiation || PrevPointOfInstantiation.isValid()) && \"Explicit instantiation without point of instantiation?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8184, __PRETTY_FUNCTION__)) | |||
8183 | PrevPointOfInstantiation.isValid()) &&(((PrevTSK == TSK_ImplicitInstantiation || PrevPointOfInstantiation .isValid()) && "Explicit instantiation without point of instantiation?" ) ? static_cast<void> (0) : __assert_fail ("(PrevTSK == TSK_ImplicitInstantiation || PrevPointOfInstantiation.isValid()) && \"Explicit instantiation without point of instantiation?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8184, __PRETTY_FUNCTION__)) | |||
8184 | "Explicit instantiation without point of instantiation?")(((PrevTSK == TSK_ImplicitInstantiation || PrevPointOfInstantiation .isValid()) && "Explicit instantiation without point of instantiation?" ) ? static_cast<void> (0) : __assert_fail ("(PrevTSK == TSK_ImplicitInstantiation || PrevPointOfInstantiation.isValid()) && \"Explicit instantiation without point of instantiation?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8184, __PRETTY_FUNCTION__)); | |||
8185 | ||||
8186 | // C++ [temp.expl.spec]p6: | |||
8187 | // If a template, a member template or the member of a class template | |||
8188 | // is explicitly specialized then that specialization shall be declared | |||
8189 | // before the first use of that specialization that would cause an | |||
8190 | // implicit instantiation to take place, in every translation unit in | |||
8191 | // which such a use occurs; no diagnostic is required. | |||
8192 | for (Decl *Prev = PrevDecl; Prev; Prev = Prev->getPreviousDecl()) { | |||
8193 | // Is there any previous explicit specialization declaration? | |||
8194 | if (getTemplateSpecializationKind(Prev) == TSK_ExplicitSpecialization) | |||
8195 | return false; | |||
8196 | } | |||
8197 | ||||
8198 | Diag(NewLoc, diag::err_specialization_after_instantiation) | |||
8199 | << PrevDecl; | |||
8200 | Diag(PrevPointOfInstantiation, diag::note_instantiation_required_here) | |||
8201 | << (PrevTSK != TSK_ImplicitInstantiation); | |||
8202 | ||||
8203 | return true; | |||
8204 | } | |||
8205 | llvm_unreachable("The switch over PrevTSK must be exhaustive.")::llvm::llvm_unreachable_internal("The switch over PrevTSK must be exhaustive." , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8205); | |||
8206 | ||||
8207 | case TSK_ExplicitInstantiationDeclaration: | |||
8208 | switch (PrevTSK) { | |||
8209 | case TSK_ExplicitInstantiationDeclaration: | |||
8210 | // This explicit instantiation declaration is redundant (that's okay). | |||
8211 | HasNoEffect = true; | |||
8212 | return false; | |||
8213 | ||||
8214 | case TSK_Undeclared: | |||
8215 | case TSK_ImplicitInstantiation: | |||
8216 | // We're explicitly instantiating something that may have already been | |||
8217 | // implicitly instantiated; that's fine. | |||
8218 | return false; | |||
8219 | ||||
8220 | case TSK_ExplicitSpecialization: | |||
8221 | // C++0x [temp.explicit]p4: | |||
8222 | // For a given set of template parameters, if an explicit instantiation | |||
8223 | // of a template appears after a declaration of an explicit | |||
8224 | // specialization for that template, the explicit instantiation has no | |||
8225 | // effect. | |||
8226 | HasNoEffect = true; | |||
8227 | return false; | |||
8228 | ||||
8229 | case TSK_ExplicitInstantiationDefinition: | |||
8230 | // C++0x [temp.explicit]p10: | |||
8231 | // If an entity is the subject of both an explicit instantiation | |||
8232 | // declaration and an explicit instantiation definition in the same | |||
8233 | // translation unit, the definition shall follow the declaration. | |||
8234 | Diag(NewLoc, | |||
8235 | diag::err_explicit_instantiation_declaration_after_definition); | |||
8236 | ||||
8237 | // Explicit instantiations following a specialization have no effect and | |||
8238 | // hence no PrevPointOfInstantiation. In that case, walk decl backwards | |||
8239 | // until a valid name loc is found. | |||
8240 | Diag(DiagLocForExplicitInstantiation(PrevDecl, PrevPointOfInstantiation), | |||
8241 | diag::note_explicit_instantiation_definition_here); | |||
8242 | HasNoEffect = true; | |||
8243 | return false; | |||
8244 | } | |||
8245 | llvm_unreachable("Unexpected TemplateSpecializationKind!")::llvm::llvm_unreachable_internal("Unexpected TemplateSpecializationKind!" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8245); | |||
8246 | ||||
8247 | case TSK_ExplicitInstantiationDefinition: | |||
8248 | switch (PrevTSK) { | |||
8249 | case TSK_Undeclared: | |||
8250 | case TSK_ImplicitInstantiation: | |||
8251 | // We're explicitly instantiating something that may have already been | |||
8252 | // implicitly instantiated; that's fine. | |||
8253 | return false; | |||
8254 | ||||
8255 | case TSK_ExplicitSpecialization: | |||
8256 | // C++ DR 259, C++0x [temp.explicit]p4: | |||
8257 | // For a given set of template parameters, if an explicit | |||
8258 | // instantiation of a template appears after a declaration of | |||
8259 | // an explicit specialization for that template, the explicit | |||
8260 | // instantiation has no effect. | |||
8261 | Diag(NewLoc, diag::warn_explicit_instantiation_after_specialization) | |||
8262 | << PrevDecl; | |||
8263 | Diag(PrevDecl->getLocation(), | |||
8264 | diag::note_previous_template_specialization); | |||
8265 | HasNoEffect = true; | |||
8266 | return false; | |||
8267 | ||||
8268 | case TSK_ExplicitInstantiationDeclaration: | |||
8269 | // We're explicitly instantiating a definition for something for which we | |||
8270 | // were previously asked to suppress instantiations. That's fine. | |||
8271 | ||||
8272 | // C++0x [temp.explicit]p4: | |||
8273 | // For a given set of template parameters, if an explicit instantiation | |||
8274 | // of a template appears after a declaration of an explicit | |||
8275 | // specialization for that template, the explicit instantiation has no | |||
8276 | // effect. | |||
8277 | for (Decl *Prev = PrevDecl; Prev; Prev = Prev->getPreviousDecl()) { | |||
8278 | // Is there any previous explicit specialization declaration? | |||
8279 | if (getTemplateSpecializationKind(Prev) == TSK_ExplicitSpecialization) { | |||
8280 | HasNoEffect = true; | |||
8281 | break; | |||
8282 | } | |||
8283 | } | |||
8284 | ||||
8285 | return false; | |||
8286 | ||||
8287 | case TSK_ExplicitInstantiationDefinition: | |||
8288 | // C++0x [temp.spec]p5: | |||
8289 | // For a given template and a given set of template-arguments, | |||
8290 | // - an explicit instantiation definition shall appear at most once | |||
8291 | // in a program, | |||
8292 | ||||
8293 | // MSVCCompat: MSVC silently ignores duplicate explicit instantiations. | |||
8294 | Diag(NewLoc, (getLangOpts().MSVCCompat) | |||
8295 | ? diag::ext_explicit_instantiation_duplicate | |||
8296 | : diag::err_explicit_instantiation_duplicate) | |||
8297 | << PrevDecl; | |||
8298 | Diag(DiagLocForExplicitInstantiation(PrevDecl, PrevPointOfInstantiation), | |||
8299 | diag::note_previous_explicit_instantiation); | |||
8300 | HasNoEffect = true; | |||
8301 | return false; | |||
8302 | } | |||
8303 | } | |||
8304 | ||||
8305 | llvm_unreachable("Missing specialization/instantiation case?")::llvm::llvm_unreachable_internal("Missing specialization/instantiation case?" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8305); | |||
8306 | } | |||
8307 | ||||
8308 | /// Perform semantic analysis for the given dependent function | |||
8309 | /// template specialization. | |||
8310 | /// | |||
8311 | /// The only possible way to get a dependent function template specialization | |||
8312 | /// is with a friend declaration, like so: | |||
8313 | /// | |||
8314 | /// \code | |||
8315 | /// template \<class T> void foo(T); | |||
8316 | /// template \<class T> class A { | |||
8317 | /// friend void foo<>(T); | |||
8318 | /// }; | |||
8319 | /// \endcode | |||
8320 | /// | |||
8321 | /// There really isn't any useful analysis we can do here, so we | |||
8322 | /// just store the information. | |||
8323 | bool | |||
8324 | Sema::CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, | |||
8325 | const TemplateArgumentListInfo &ExplicitTemplateArgs, | |||
8326 | LookupResult &Previous) { | |||
8327 | // Remove anything from Previous that isn't a function template in | |||
8328 | // the correct context. | |||
8329 | DeclContext *FDLookupContext = FD->getDeclContext()->getRedeclContext(); | |||
8330 | LookupResult::Filter F = Previous.makeFilter(); | |||
8331 | enum DiscardReason { NotAFunctionTemplate, NotAMemberOfEnclosing }; | |||
8332 | SmallVector<std::pair<DiscardReason, Decl *>, 8> DiscardedCandidates; | |||
8333 | while (F.hasNext()) { | |||
8334 | NamedDecl *D = F.next()->getUnderlyingDecl(); | |||
8335 | if (!isa<FunctionTemplateDecl>(D)) { | |||
8336 | F.erase(); | |||
8337 | DiscardedCandidates.push_back(std::make_pair(NotAFunctionTemplate, D)); | |||
8338 | continue; | |||
8339 | } | |||
8340 | ||||
8341 | if (!FDLookupContext->InEnclosingNamespaceSetOf( | |||
8342 | D->getDeclContext()->getRedeclContext())) { | |||
8343 | F.erase(); | |||
8344 | DiscardedCandidates.push_back(std::make_pair(NotAMemberOfEnclosing, D)); | |||
8345 | continue; | |||
8346 | } | |||
8347 | } | |||
8348 | F.done(); | |||
8349 | ||||
8350 | if (Previous.empty()) { | |||
8351 | Diag(FD->getLocation(), | |||
8352 | diag::err_dependent_function_template_spec_no_match); | |||
8353 | for (auto &P : DiscardedCandidates) | |||
8354 | Diag(P.second->getLocation(), | |||
8355 | diag::note_dependent_function_template_spec_discard_reason) | |||
8356 | << P.first; | |||
8357 | return true; | |||
8358 | } | |||
8359 | ||||
8360 | FD->setDependentTemplateSpecialization(Context, Previous.asUnresolvedSet(), | |||
8361 | ExplicitTemplateArgs); | |||
8362 | return false; | |||
8363 | } | |||
8364 | ||||
8365 | /// Perform semantic analysis for the given function template | |||
8366 | /// specialization. | |||
8367 | /// | |||
8368 | /// This routine performs all of the semantic analysis required for an | |||
8369 | /// explicit function template specialization. On successful completion, | |||
8370 | /// the function declaration \p FD will become a function template | |||
8371 | /// specialization. | |||
8372 | /// | |||
8373 | /// \param FD the function declaration, which will be updated to become a | |||
8374 | /// function template specialization. | |||
8375 | /// | |||
8376 | /// \param ExplicitTemplateArgs the explicitly-provided template arguments, | |||
8377 | /// if any. Note that this may be valid info even when 0 arguments are | |||
8378 | /// explicitly provided as in, e.g., \c void sort<>(char*, char*); | |||
8379 | /// as it anyway contains info on the angle brackets locations. | |||
8380 | /// | |||
8381 | /// \param Previous the set of declarations that may be specialized by | |||
8382 | /// this function specialization. | |||
8383 | /// | |||
8384 | /// \param QualifiedFriend whether this is a lookup for a qualified friend | |||
8385 | /// declaration with no explicit template argument list that might be | |||
8386 | /// befriending a function template specialization. | |||
8387 | bool Sema::CheckFunctionTemplateSpecialization( | |||
8388 | FunctionDecl *FD, TemplateArgumentListInfo *ExplicitTemplateArgs, | |||
8389 | LookupResult &Previous, bool QualifiedFriend) { | |||
8390 | // The set of function template specializations that could match this | |||
8391 | // explicit function template specialization. | |||
8392 | UnresolvedSet<8> Candidates; | |||
8393 | TemplateSpecCandidateSet FailedCandidates(FD->getLocation(), | |||
8394 | /*ForTakingAddress=*/false); | |||
8395 | ||||
8396 | llvm::SmallDenseMap<FunctionDecl *, TemplateArgumentListInfo, 8> | |||
8397 | ConvertedTemplateArgs; | |||
8398 | ||||
8399 | DeclContext *FDLookupContext = FD->getDeclContext()->getRedeclContext(); | |||
8400 | for (LookupResult::iterator I = Previous.begin(), E = Previous.end(); | |||
8401 | I != E; ++I) { | |||
8402 | NamedDecl *Ovl = (*I)->getUnderlyingDecl(); | |||
8403 | if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(Ovl)) { | |||
8404 | // Only consider templates found within the same semantic lookup scope as | |||
8405 | // FD. | |||
8406 | if (!FDLookupContext->InEnclosingNamespaceSetOf( | |||
8407 | Ovl->getDeclContext()->getRedeclContext())) | |||
8408 | continue; | |||
8409 | ||||
8410 | // When matching a constexpr member function template specialization | |||
8411 | // against the primary template, we don't yet know whether the | |||
8412 | // specialization has an implicit 'const' (because we don't know whether | |||
8413 | // it will be a static member function until we know which template it | |||
8414 | // specializes), so adjust it now assuming it specializes this template. | |||
8415 | QualType FT = FD->getType(); | |||
8416 | if (FD->isConstexpr()) { | |||
8417 | CXXMethodDecl *OldMD = | |||
8418 | dyn_cast<CXXMethodDecl>(FunTmpl->getTemplatedDecl()); | |||
8419 | if (OldMD && OldMD->isConst()) { | |||
8420 | const FunctionProtoType *FPT = FT->castAs<FunctionProtoType>(); | |||
8421 | FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); | |||
8422 | EPI.TypeQuals.addConst(); | |||
8423 | FT = Context.getFunctionType(FPT->getReturnType(), | |||
8424 | FPT->getParamTypes(), EPI); | |||
8425 | } | |||
8426 | } | |||
8427 | ||||
8428 | TemplateArgumentListInfo Args; | |||
8429 | if (ExplicitTemplateArgs) | |||
8430 | Args = *ExplicitTemplateArgs; | |||
8431 | ||||
8432 | // C++ [temp.expl.spec]p11: | |||
8433 | // A trailing template-argument can be left unspecified in the | |||
8434 | // template-id naming an explicit function template specialization | |||
8435 | // provided it can be deduced from the function argument type. | |||
8436 | // Perform template argument deduction to determine whether we may be | |||
8437 | // specializing this template. | |||
8438 | // FIXME: It is somewhat wasteful to build | |||
8439 | TemplateDeductionInfo Info(FailedCandidates.getLocation()); | |||
8440 | FunctionDecl *Specialization = nullptr; | |||
8441 | if (TemplateDeductionResult TDK = DeduceTemplateArguments( | |||
8442 | cast<FunctionTemplateDecl>(FunTmpl->getFirstDecl()), | |||
8443 | ExplicitTemplateArgs ? &Args : nullptr, FT, Specialization, | |||
8444 | Info)) { | |||
8445 | // Template argument deduction failed; record why it failed, so | |||
8446 | // that we can provide nifty diagnostics. | |||
8447 | FailedCandidates.addCandidate().set( | |||
8448 | I.getPair(), FunTmpl->getTemplatedDecl(), | |||
8449 | MakeDeductionFailureInfo(Context, TDK, Info)); | |||
8450 | (void)TDK; | |||
8451 | continue; | |||
8452 | } | |||
8453 | ||||
8454 | // Target attributes are part of the cuda function signature, so | |||
8455 | // the deduced template's cuda target must match that of the | |||
8456 | // specialization. Given that C++ template deduction does not | |||
8457 | // take target attributes into account, we reject candidates | |||
8458 | // here that have a different target. | |||
8459 | if (LangOpts.CUDA && | |||
8460 | IdentifyCUDATarget(Specialization, | |||
8461 | /* IgnoreImplicitHDAttr = */ true) != | |||
8462 | IdentifyCUDATarget(FD, /* IgnoreImplicitHDAttr = */ true)) { | |||
8463 | FailedCandidates.addCandidate().set( | |||
8464 | I.getPair(), FunTmpl->getTemplatedDecl(), | |||
8465 | MakeDeductionFailureInfo(Context, TDK_CUDATargetMismatch, Info)); | |||
8466 | continue; | |||
8467 | } | |||
8468 | ||||
8469 | // Record this candidate. | |||
8470 | if (ExplicitTemplateArgs) | |||
8471 | ConvertedTemplateArgs[Specialization] = std::move(Args); | |||
8472 | Candidates.addDecl(Specialization, I.getAccess()); | |||
8473 | } | |||
8474 | } | |||
8475 | ||||
8476 | // For a qualified friend declaration (with no explicit marker to indicate | |||
8477 | // that a template specialization was intended), note all (template and | |||
8478 | // non-template) candidates. | |||
8479 | if (QualifiedFriend && Candidates.empty()) { | |||
8480 | Diag(FD->getLocation(), diag::err_qualified_friend_no_match) | |||
8481 | << FD->getDeclName() << FDLookupContext; | |||
8482 | // FIXME: We should form a single candidate list and diagnose all | |||
8483 | // candidates at once, to get proper sorting and limiting. | |||
8484 | for (auto *OldND : Previous) { | |||
8485 | if (auto *OldFD = dyn_cast<FunctionDecl>(OldND->getUnderlyingDecl())) | |||
8486 | NoteOverloadCandidate(OldND, OldFD, FD->getType(), false); | |||
8487 | } | |||
8488 | FailedCandidates.NoteCandidates(*this, FD->getLocation()); | |||
8489 | return true; | |||
8490 | } | |||
8491 | ||||
8492 | // Find the most specialized function template. | |||
8493 | UnresolvedSetIterator Result = getMostSpecialized( | |||
8494 | Candidates.begin(), Candidates.end(), FailedCandidates, FD->getLocation(), | |||
8495 | PDiag(diag::err_function_template_spec_no_match) << FD->getDeclName(), | |||
8496 | PDiag(diag::err_function_template_spec_ambiguous) | |||
8497 | << FD->getDeclName() << (ExplicitTemplateArgs != nullptr), | |||
8498 | PDiag(diag::note_function_template_spec_matched)); | |||
8499 | ||||
8500 | if (Result == Candidates.end()) | |||
8501 | return true; | |||
8502 | ||||
8503 | // Ignore access information; it doesn't figure into redeclaration checking. | |||
8504 | FunctionDecl *Specialization = cast<FunctionDecl>(*Result); | |||
8505 | ||||
8506 | FunctionTemplateSpecializationInfo *SpecInfo | |||
8507 | = Specialization->getTemplateSpecializationInfo(); | |||
8508 | assert(SpecInfo && "Function template specialization info missing?")((SpecInfo && "Function template specialization info missing?" ) ? static_cast<void> (0) : __assert_fail ("SpecInfo && \"Function template specialization info missing?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8508, __PRETTY_FUNCTION__)); | |||
8509 | ||||
8510 | // Note: do not overwrite location info if previous template | |||
8511 | // specialization kind was explicit. | |||
8512 | TemplateSpecializationKind TSK = SpecInfo->getTemplateSpecializationKind(); | |||
8513 | if (TSK == TSK_Undeclared || TSK == TSK_ImplicitInstantiation) { | |||
8514 | Specialization->setLocation(FD->getLocation()); | |||
8515 | Specialization->setLexicalDeclContext(FD->getLexicalDeclContext()); | |||
8516 | // C++11 [dcl.constexpr]p1: An explicit specialization of a constexpr | |||
8517 | // function can differ from the template declaration with respect to | |||
8518 | // the constexpr specifier. | |||
8519 | // FIXME: We need an update record for this AST mutation. | |||
8520 | // FIXME: What if there are multiple such prior declarations (for instance, | |||
8521 | // from different modules)? | |||
8522 | Specialization->setConstexprKind(FD->getConstexprKind()); | |||
8523 | } | |||
8524 | ||||
8525 | // FIXME: Check if the prior specialization has a point of instantiation. | |||
8526 | // If so, we have run afoul of . | |||
8527 | ||||
8528 | // If this is a friend declaration, then we're not really declaring | |||
8529 | // an explicit specialization. | |||
8530 | bool isFriend = (FD->getFriendObjectKind() != Decl::FOK_None); | |||
8531 | ||||
8532 | // Check the scope of this explicit specialization. | |||
8533 | if (!isFriend && | |||
8534 | CheckTemplateSpecializationScope(*this, | |||
8535 | Specialization->getPrimaryTemplate(), | |||
8536 | Specialization, FD->getLocation(), | |||
8537 | false)) | |||
8538 | return true; | |||
8539 | ||||
8540 | // C++ [temp.expl.spec]p6: | |||
8541 | // If a template, a member template or the member of a class template is | |||
8542 | // explicitly specialized then that specialization shall be declared | |||
8543 | // before the first use of that specialization that would cause an implicit | |||
8544 | // instantiation to take place, in every translation unit in which such a | |||
8545 | // use occurs; no diagnostic is required. | |||
8546 | bool HasNoEffect = false; | |||
8547 | if (!isFriend && | |||
8548 | CheckSpecializationInstantiationRedecl(FD->getLocation(), | |||
8549 | TSK_ExplicitSpecialization, | |||
8550 | Specialization, | |||
8551 | SpecInfo->getTemplateSpecializationKind(), | |||
8552 | SpecInfo->getPointOfInstantiation(), | |||
8553 | HasNoEffect)) | |||
8554 | return true; | |||
8555 | ||||
8556 | // Mark the prior declaration as an explicit specialization, so that later | |||
8557 | // clients know that this is an explicit specialization. | |||
8558 | if (!isFriend) { | |||
8559 | // Since explicit specializations do not inherit '=delete' from their | |||
8560 | // primary function template - check if the 'specialization' that was | |||
8561 | // implicitly generated (during template argument deduction for partial | |||
8562 | // ordering) from the most specialized of all the function templates that | |||
8563 | // 'FD' could have been specializing, has a 'deleted' definition. If so, | |||
8564 | // first check that it was implicitly generated during template argument | |||
8565 | // deduction by making sure it wasn't referenced, and then reset the deleted | |||
8566 | // flag to not-deleted, so that we can inherit that information from 'FD'. | |||
8567 | if (Specialization->isDeleted() && !SpecInfo->isExplicitSpecialization() && | |||
8568 | !Specialization->getCanonicalDecl()->isReferenced()) { | |||
8569 | // FIXME: This assert will not hold in the presence of modules. | |||
8570 | assert(((Specialization->getCanonicalDecl() == Specialization && "This must be the only existing declaration of this specialization" ) ? static_cast<void> (0) : __assert_fail ("Specialization->getCanonicalDecl() == Specialization && \"This must be the only existing declaration of this specialization\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8572, __PRETTY_FUNCTION__)) | |||
8571 | Specialization->getCanonicalDecl() == Specialization &&((Specialization->getCanonicalDecl() == Specialization && "This must be the only existing declaration of this specialization" ) ? static_cast<void> (0) : __assert_fail ("Specialization->getCanonicalDecl() == Specialization && \"This must be the only existing declaration of this specialization\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8572, __PRETTY_FUNCTION__)) | |||
8572 | "This must be the only existing declaration of this specialization")((Specialization->getCanonicalDecl() == Specialization && "This must be the only existing declaration of this specialization" ) ? static_cast<void> (0) : __assert_fail ("Specialization->getCanonicalDecl() == Specialization && \"This must be the only existing declaration of this specialization\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8572, __PRETTY_FUNCTION__)); | |||
8573 | // FIXME: We need an update record for this AST mutation. | |||
8574 | Specialization->setDeletedAsWritten(false); | |||
8575 | } | |||
8576 | // FIXME: We need an update record for this AST mutation. | |||
8577 | SpecInfo->setTemplateSpecializationKind(TSK_ExplicitSpecialization); | |||
8578 | MarkUnusedFileScopedDecl(Specialization); | |||
8579 | } | |||
8580 | ||||
8581 | // Turn the given function declaration into a function template | |||
8582 | // specialization, with the template arguments from the previous | |||
8583 | // specialization. | |||
8584 | // Take copies of (semantic and syntactic) template argument lists. | |||
8585 | const TemplateArgumentList* TemplArgs = new (Context) | |||
8586 | TemplateArgumentList(Specialization->getTemplateSpecializationArgs()); | |||
8587 | FD->setFunctionTemplateSpecialization( | |||
8588 | Specialization->getPrimaryTemplate(), TemplArgs, /*InsertPos=*/nullptr, | |||
8589 | SpecInfo->getTemplateSpecializationKind(), | |||
8590 | ExplicitTemplateArgs ? &ConvertedTemplateArgs[Specialization] : nullptr); | |||
8591 | ||||
8592 | // A function template specialization inherits the target attributes | |||
8593 | // of its template. (We require the attributes explicitly in the | |||
8594 | // code to match, but a template may have implicit attributes by | |||
8595 | // virtue e.g. of being constexpr, and it passes these implicit | |||
8596 | // attributes on to its specializations.) | |||
8597 | if (LangOpts.CUDA) | |||
8598 | inheritCUDATargetAttrs(FD, *Specialization->getPrimaryTemplate()); | |||
8599 | ||||
8600 | // The "previous declaration" for this function template specialization is | |||
8601 | // the prior function template specialization. | |||
8602 | Previous.clear(); | |||
8603 | Previous.addDecl(Specialization); | |||
8604 | return false; | |||
8605 | } | |||
8606 | ||||
8607 | /// Perform semantic analysis for the given non-template member | |||
8608 | /// specialization. | |||
8609 | /// | |||
8610 | /// This routine performs all of the semantic analysis required for an | |||
8611 | /// explicit member function specialization. On successful completion, | |||
8612 | /// the function declaration \p FD will become a member function | |||
8613 | /// specialization. | |||
8614 | /// | |||
8615 | /// \param Member the member declaration, which will be updated to become a | |||
8616 | /// specialization. | |||
8617 | /// | |||
8618 | /// \param Previous the set of declarations, one of which may be specialized | |||
8619 | /// by this function specialization; the set will be modified to contain the | |||
8620 | /// redeclared member. | |||
8621 | bool | |||
8622 | Sema::CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous) { | |||
8623 | assert(!isa<TemplateDecl>(Member) && "Only for non-template members")((!isa<TemplateDecl>(Member) && "Only for non-template members" ) ? static_cast<void> (0) : __assert_fail ("!isa<TemplateDecl>(Member) && \"Only for non-template members\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8623, __PRETTY_FUNCTION__)); | |||
8624 | ||||
8625 | // Try to find the member we are instantiating. | |||
8626 | NamedDecl *FoundInstantiation = nullptr; | |||
8627 | NamedDecl *Instantiation = nullptr; | |||
8628 | NamedDecl *InstantiatedFrom = nullptr; | |||
8629 | MemberSpecializationInfo *MSInfo = nullptr; | |||
8630 | ||||
8631 | if (Previous.empty()) { | |||
8632 | // Nowhere to look anyway. | |||
8633 | } else if (FunctionDecl *Function = dyn_cast<FunctionDecl>(Member)) { | |||
8634 | for (LookupResult::iterator I = Previous.begin(), E = Previous.end(); | |||
8635 | I != E; ++I) { | |||
8636 | NamedDecl *D = (*I)->getUnderlyingDecl(); | |||
8637 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) { | |||
8638 | QualType Adjusted = Function->getType(); | |||
8639 | if (!hasExplicitCallingConv(Adjusted)) | |||
8640 | Adjusted = adjustCCAndNoReturn(Adjusted, Method->getType()); | |||
8641 | // This doesn't handle deduced return types, but both function | |||
8642 | // declarations should be undeduced at this point. | |||
8643 | if (Context.hasSameType(Adjusted, Method->getType())) { | |||
8644 | FoundInstantiation = *I; | |||
8645 | Instantiation = Method; | |||
8646 | InstantiatedFrom = Method->getInstantiatedFromMemberFunction(); | |||
8647 | MSInfo = Method->getMemberSpecializationInfo(); | |||
8648 | break; | |||
8649 | } | |||
8650 | } | |||
8651 | } | |||
8652 | } else if (isa<VarDecl>(Member)) { | |||
8653 | VarDecl *PrevVar; | |||
8654 | if (Previous.isSingleResult() && | |||
8655 | (PrevVar = dyn_cast<VarDecl>(Previous.getFoundDecl()))) | |||
8656 | if (PrevVar->isStaticDataMember()) { | |||
8657 | FoundInstantiation = Previous.getRepresentativeDecl(); | |||
8658 | Instantiation = PrevVar; | |||
8659 | InstantiatedFrom = PrevVar->getInstantiatedFromStaticDataMember(); | |||
8660 | MSInfo = PrevVar->getMemberSpecializationInfo(); | |||
8661 | } | |||
8662 | } else if (isa<RecordDecl>(Member)) { | |||
8663 | CXXRecordDecl *PrevRecord; | |||
8664 | if (Previous.isSingleResult() && | |||
8665 | (PrevRecord = dyn_cast<CXXRecordDecl>(Previous.getFoundDecl()))) { | |||
8666 | FoundInstantiation = Previous.getRepresentativeDecl(); | |||
8667 | Instantiation = PrevRecord; | |||
8668 | InstantiatedFrom = PrevRecord->getInstantiatedFromMemberClass(); | |||
8669 | MSInfo = PrevRecord->getMemberSpecializationInfo(); | |||
8670 | } | |||
8671 | } else if (isa<EnumDecl>(Member)) { | |||
8672 | EnumDecl *PrevEnum; | |||
8673 | if (Previous.isSingleResult() && | |||
8674 | (PrevEnum = dyn_cast<EnumDecl>(Previous.getFoundDecl()))) { | |||
8675 | FoundInstantiation = Previous.getRepresentativeDecl(); | |||
8676 | Instantiation = PrevEnum; | |||
8677 | InstantiatedFrom = PrevEnum->getInstantiatedFromMemberEnum(); | |||
8678 | MSInfo = PrevEnum->getMemberSpecializationInfo(); | |||
8679 | } | |||
8680 | } | |||
8681 | ||||
8682 | if (!Instantiation) { | |||
8683 | // There is no previous declaration that matches. Since member | |||
8684 | // specializations are always out-of-line, the caller will complain about | |||
8685 | // this mismatch later. | |||
8686 | return false; | |||
8687 | } | |||
8688 | ||||
8689 | // A member specialization in a friend declaration isn't really declaring | |||
8690 | // an explicit specialization, just identifying a specific (possibly implicit) | |||
8691 | // specialization. Don't change the template specialization kind. | |||
8692 | // | |||
8693 | // FIXME: Is this really valid? Other compilers reject. | |||
8694 | if (Member->getFriendObjectKind() != Decl::FOK_None) { | |||
8695 | // Preserve instantiation information. | |||
8696 | if (InstantiatedFrom && isa<CXXMethodDecl>(Member)) { | |||
8697 | cast<CXXMethodDecl>(Member)->setInstantiationOfMemberFunction( | |||
8698 | cast<CXXMethodDecl>(InstantiatedFrom), | |||
8699 | cast<CXXMethodDecl>(Instantiation)->getTemplateSpecializationKind()); | |||
8700 | } else if (InstantiatedFrom && isa<CXXRecordDecl>(Member)) { | |||
8701 | cast<CXXRecordDecl>(Member)->setInstantiationOfMemberClass( | |||
8702 | cast<CXXRecordDecl>(InstantiatedFrom), | |||
8703 | cast<CXXRecordDecl>(Instantiation)->getTemplateSpecializationKind()); | |||
8704 | } | |||
8705 | ||||
8706 | Previous.clear(); | |||
8707 | Previous.addDecl(FoundInstantiation); | |||
8708 | return false; | |||
8709 | } | |||
8710 | ||||
8711 | // Make sure that this is a specialization of a member. | |||
8712 | if (!InstantiatedFrom) { | |||
8713 | Diag(Member->getLocation(), diag::err_spec_member_not_instantiated) | |||
8714 | << Member; | |||
8715 | Diag(Instantiation->getLocation(), diag::note_specialized_decl); | |||
8716 | return true; | |||
8717 | } | |||
8718 | ||||
8719 | // C++ [temp.expl.spec]p6: | |||
8720 | // If a template, a member template or the member of a class template is | |||
8721 | // explicitly specialized then that specialization shall be declared | |||
8722 | // before the first use of that specialization that would cause an implicit | |||
8723 | // instantiation to take place, in every translation unit in which such a | |||
8724 | // use occurs; no diagnostic is required. | |||
8725 | assert(MSInfo && "Member specialization info missing?")((MSInfo && "Member specialization info missing?") ? static_cast <void> (0) : __assert_fail ("MSInfo && \"Member specialization info missing?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8725, __PRETTY_FUNCTION__)); | |||
8726 | ||||
8727 | bool HasNoEffect = false; | |||
8728 | if (CheckSpecializationInstantiationRedecl(Member->getLocation(), | |||
8729 | TSK_ExplicitSpecialization, | |||
8730 | Instantiation, | |||
8731 | MSInfo->getTemplateSpecializationKind(), | |||
8732 | MSInfo->getPointOfInstantiation(), | |||
8733 | HasNoEffect)) | |||
8734 | return true; | |||
8735 | ||||
8736 | // Check the scope of this explicit specialization. | |||
8737 | if (CheckTemplateSpecializationScope(*this, | |||
8738 | InstantiatedFrom, | |||
8739 | Instantiation, Member->getLocation(), | |||
8740 | false)) | |||
8741 | return true; | |||
8742 | ||||
8743 | // Note that this member specialization is an "instantiation of" the | |||
8744 | // corresponding member of the original template. | |||
8745 | if (auto *MemberFunction = dyn_cast<FunctionDecl>(Member)) { | |||
8746 | FunctionDecl *InstantiationFunction = cast<FunctionDecl>(Instantiation); | |||
8747 | if (InstantiationFunction->getTemplateSpecializationKind() == | |||
8748 | TSK_ImplicitInstantiation) { | |||
8749 | // Explicit specializations of member functions of class templates do not | |||
8750 | // inherit '=delete' from the member function they are specializing. | |||
8751 | if (InstantiationFunction->isDeleted()) { | |||
8752 | // FIXME: This assert will not hold in the presence of modules. | |||
8753 | assert(InstantiationFunction->getCanonicalDecl() ==((InstantiationFunction->getCanonicalDecl() == InstantiationFunction ) ? static_cast<void> (0) : __assert_fail ("InstantiationFunction->getCanonicalDecl() == InstantiationFunction" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8754, __PRETTY_FUNCTION__)) | |||
8754 | InstantiationFunction)((InstantiationFunction->getCanonicalDecl() == InstantiationFunction ) ? static_cast<void> (0) : __assert_fail ("InstantiationFunction->getCanonicalDecl() == InstantiationFunction" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8754, __PRETTY_FUNCTION__)); | |||
8755 | // FIXME: We need an update record for this AST mutation. | |||
8756 | InstantiationFunction->setDeletedAsWritten(false); | |||
8757 | } | |||
8758 | } | |||
8759 | ||||
8760 | MemberFunction->setInstantiationOfMemberFunction( | |||
8761 | cast<CXXMethodDecl>(InstantiatedFrom), TSK_ExplicitSpecialization); | |||
8762 | } else if (auto *MemberVar = dyn_cast<VarDecl>(Member)) { | |||
8763 | MemberVar->setInstantiationOfStaticDataMember( | |||
8764 | cast<VarDecl>(InstantiatedFrom), TSK_ExplicitSpecialization); | |||
8765 | } else if (auto *MemberClass = dyn_cast<CXXRecordDecl>(Member)) { | |||
8766 | MemberClass->setInstantiationOfMemberClass( | |||
8767 | cast<CXXRecordDecl>(InstantiatedFrom), TSK_ExplicitSpecialization); | |||
8768 | } else if (auto *MemberEnum = dyn_cast<EnumDecl>(Member)) { | |||
8769 | MemberEnum->setInstantiationOfMemberEnum( | |||
8770 | cast<EnumDecl>(InstantiatedFrom), TSK_ExplicitSpecialization); | |||
8771 | } else { | |||
8772 | llvm_unreachable("unknown member specialization kind")::llvm::llvm_unreachable_internal("unknown member specialization kind" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8772); | |||
8773 | } | |||
8774 | ||||
8775 | // Save the caller the trouble of having to figure out which declaration | |||
8776 | // this specialization matches. | |||
8777 | Previous.clear(); | |||
8778 | Previous.addDecl(FoundInstantiation); | |||
8779 | return false; | |||
8780 | } | |||
8781 | ||||
8782 | /// Complete the explicit specialization of a member of a class template by | |||
8783 | /// updating the instantiated member to be marked as an explicit specialization. | |||
8784 | /// | |||
8785 | /// \param OrigD The member declaration instantiated from the template. | |||
8786 | /// \param Loc The location of the explicit specialization of the member. | |||
8787 | template<typename DeclT> | |||
8788 | static void completeMemberSpecializationImpl(Sema &S, DeclT *OrigD, | |||
8789 | SourceLocation Loc) { | |||
8790 | if (OrigD->getTemplateSpecializationKind() != TSK_ImplicitInstantiation) | |||
8791 | return; | |||
8792 | ||||
8793 | // FIXME: Inform AST mutation listeners of this AST mutation. | |||
8794 | // FIXME: If there are multiple in-class declarations of the member (from | |||
8795 | // multiple modules, or a declaration and later definition of a member type), | |||
8796 | // should we update all of them? | |||
8797 | OrigD->setTemplateSpecializationKind(TSK_ExplicitSpecialization); | |||
8798 | OrigD->setLocation(Loc); | |||
8799 | } | |||
8800 | ||||
8801 | void Sema::CompleteMemberSpecialization(NamedDecl *Member, | |||
8802 | LookupResult &Previous) { | |||
8803 | NamedDecl *Instantiation = cast<NamedDecl>(Member->getCanonicalDecl()); | |||
8804 | if (Instantiation == Member) | |||
8805 | return; | |||
8806 | ||||
8807 | if (auto *Function = dyn_cast<CXXMethodDecl>(Instantiation)) | |||
8808 | completeMemberSpecializationImpl(*this, Function, Member->getLocation()); | |||
8809 | else if (auto *Var = dyn_cast<VarDecl>(Instantiation)) | |||
8810 | completeMemberSpecializationImpl(*this, Var, Member->getLocation()); | |||
8811 | else if (auto *Record = dyn_cast<CXXRecordDecl>(Instantiation)) | |||
8812 | completeMemberSpecializationImpl(*this, Record, Member->getLocation()); | |||
8813 | else if (auto *Enum = dyn_cast<EnumDecl>(Instantiation)) | |||
8814 | completeMemberSpecializationImpl(*this, Enum, Member->getLocation()); | |||
8815 | else | |||
8816 | llvm_unreachable("unknown member specialization kind")::llvm::llvm_unreachable_internal("unknown member specialization kind" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8816); | |||
8817 | } | |||
8818 | ||||
8819 | /// Check the scope of an explicit instantiation. | |||
8820 | /// | |||
8821 | /// \returns true if a serious error occurs, false otherwise. | |||
8822 | static bool CheckExplicitInstantiationScope(Sema &S, NamedDecl *D, | |||
8823 | SourceLocation InstLoc, | |||
8824 | bool WasQualifiedName) { | |||
8825 | DeclContext *OrigContext= D->getDeclContext()->getEnclosingNamespaceContext(); | |||
8826 | DeclContext *CurContext = S.CurContext->getRedeclContext(); | |||
8827 | ||||
8828 | if (CurContext->isRecord()) { | |||
8829 | S.Diag(InstLoc, diag::err_explicit_instantiation_in_class) | |||
8830 | << D; | |||
8831 | return true; | |||
8832 | } | |||
8833 | ||||
8834 | // C++11 [temp.explicit]p3: | |||
8835 | // An explicit instantiation shall appear in an enclosing namespace of its | |||
8836 | // template. If the name declared in the explicit instantiation is an | |||
8837 | // unqualified name, the explicit instantiation shall appear in the | |||
8838 | // namespace where its template is declared or, if that namespace is inline | |||
8839 | // (7.3.1), any namespace from its enclosing namespace set. | |||
8840 | // | |||
8841 | // This is DR275, which we do not retroactively apply to C++98/03. | |||
8842 | if (WasQualifiedName) { | |||
8843 | if (CurContext->Encloses(OrigContext)) | |||
8844 | return false; | |||
8845 | } else { | |||
8846 | if (CurContext->InEnclosingNamespaceSetOf(OrigContext)) | |||
8847 | return false; | |||
8848 | } | |||
8849 | ||||
8850 | if (NamespaceDecl *NS = dyn_cast<NamespaceDecl>(OrigContext)) { | |||
8851 | if (WasQualifiedName) | |||
8852 | S.Diag(InstLoc, | |||
8853 | S.getLangOpts().CPlusPlus11? | |||
8854 | diag::err_explicit_instantiation_out_of_scope : | |||
8855 | diag::warn_explicit_instantiation_out_of_scope_0x) | |||
8856 | << D << NS; | |||
8857 | else | |||
8858 | S.Diag(InstLoc, | |||
8859 | S.getLangOpts().CPlusPlus11? | |||
8860 | diag::err_explicit_instantiation_unqualified_wrong_namespace : | |||
8861 | diag::warn_explicit_instantiation_unqualified_wrong_namespace_0x) | |||
8862 | << D << NS; | |||
8863 | } else | |||
8864 | S.Diag(InstLoc, | |||
8865 | S.getLangOpts().CPlusPlus11? | |||
8866 | diag::err_explicit_instantiation_must_be_global : | |||
8867 | diag::warn_explicit_instantiation_must_be_global_0x) | |||
8868 | << D; | |||
8869 | S.Diag(D->getLocation(), diag::note_explicit_instantiation_here); | |||
8870 | return false; | |||
8871 | } | |||
8872 | ||||
8873 | /// Common checks for whether an explicit instantiation of \p D is valid. | |||
8874 | static bool CheckExplicitInstantiation(Sema &S, NamedDecl *D, | |||
8875 | SourceLocation InstLoc, | |||
8876 | bool WasQualifiedName, | |||
8877 | TemplateSpecializationKind TSK) { | |||
8878 | // C++ [temp.explicit]p13: | |||
8879 | // An explicit instantiation declaration shall not name a specialization of | |||
8880 | // a template with internal linkage. | |||
8881 | if (TSK == TSK_ExplicitInstantiationDeclaration && | |||
8882 | D->getFormalLinkage() == InternalLinkage) { | |||
8883 | S.Diag(InstLoc, diag::err_explicit_instantiation_internal_linkage) << D; | |||
8884 | return true; | |||
8885 | } | |||
8886 | ||||
8887 | // C++11 [temp.explicit]p3: [DR 275] | |||
8888 | // An explicit instantiation shall appear in an enclosing namespace of its | |||
8889 | // template. | |||
8890 | if (CheckExplicitInstantiationScope(S, D, InstLoc, WasQualifiedName)) | |||
8891 | return true; | |||
8892 | ||||
8893 | return false; | |||
8894 | } | |||
8895 | ||||
8896 | /// Determine whether the given scope specifier has a template-id in it. | |||
8897 | static bool ScopeSpecifierHasTemplateId(const CXXScopeSpec &SS) { | |||
8898 | if (!SS.isSet()) | |||
8899 | return false; | |||
8900 | ||||
8901 | // C++11 [temp.explicit]p3: | |||
8902 | // If the explicit instantiation is for a member function, a member class | |||
8903 | // or a static data member of a class template specialization, the name of | |||
8904 | // the class template specialization in the qualified-id for the member | |||
8905 | // name shall be a simple-template-id. | |||
8906 | // | |||
8907 | // C++98 has the same restriction, just worded differently. | |||
8908 | for (NestedNameSpecifier *NNS = SS.getScopeRep(); NNS; | |||
8909 | NNS = NNS->getPrefix()) | |||
8910 | if (const Type *T = NNS->getAsType()) | |||
8911 | if (isa<TemplateSpecializationType>(T)) | |||
8912 | return true; | |||
8913 | ||||
8914 | return false; | |||
8915 | } | |||
8916 | ||||
8917 | /// Make a dllexport or dllimport attr on a class template specialization take | |||
8918 | /// effect. | |||
8919 | static void dllExportImportClassTemplateSpecialization( | |||
8920 | Sema &S, ClassTemplateSpecializationDecl *Def) { | |||
8921 | auto *A = cast_or_null<InheritableAttr>(getDLLAttr(Def)); | |||
8922 | assert(A && "dllExportImportClassTemplateSpecialization called "((A && "dllExportImportClassTemplateSpecialization called " "on Def without dllexport or dllimport") ? static_cast<void > (0) : __assert_fail ("A && \"dllExportImportClassTemplateSpecialization called \" \"on Def without dllexport or dllimport\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8923, __PRETTY_FUNCTION__)) | |||
8923 | "on Def without dllexport or dllimport")((A && "dllExportImportClassTemplateSpecialization called " "on Def without dllexport or dllimport") ? static_cast<void > (0) : __assert_fail ("A && \"dllExportImportClassTemplateSpecialization called \" \"on Def without dllexport or dllimport\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8923, __PRETTY_FUNCTION__)); | |||
8924 | ||||
8925 | // We reject explicit instantiations in class scope, so there should | |||
8926 | // never be any delayed exported classes to worry about. | |||
8927 | assert(S.DelayedDllExportClasses.empty() &&((S.DelayedDllExportClasses.empty() && "delayed exports present at explicit instantiation" ) ? static_cast<void> (0) : __assert_fail ("S.DelayedDllExportClasses.empty() && \"delayed exports present at explicit instantiation\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8928, __PRETTY_FUNCTION__)) | |||
8928 | "delayed exports present at explicit instantiation")((S.DelayedDllExportClasses.empty() && "delayed exports present at explicit instantiation" ) ? static_cast<void> (0) : __assert_fail ("S.DelayedDllExportClasses.empty() && \"delayed exports present at explicit instantiation\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8928, __PRETTY_FUNCTION__)); | |||
8929 | S.checkClassLevelDLLAttribute(Def); | |||
8930 | ||||
8931 | // Propagate attribute to base class templates. | |||
8932 | for (auto &B : Def->bases()) { | |||
8933 | if (auto *BT = dyn_cast_or_null<ClassTemplateSpecializationDecl>( | |||
8934 | B.getType()->getAsCXXRecordDecl())) | |||
8935 | S.propagateDLLAttrToBaseClassTemplate(Def, A, BT, B.getBeginLoc()); | |||
8936 | } | |||
8937 | ||||
8938 | S.referenceDLLExportedClassMethods(); | |||
8939 | } | |||
8940 | ||||
8941 | // Explicit instantiation of a class template specialization | |||
8942 | DeclResult Sema::ActOnExplicitInstantiation( | |||
8943 | Scope *S, SourceLocation ExternLoc, SourceLocation TemplateLoc, | |||
8944 | unsigned TagSpec, SourceLocation KWLoc, const CXXScopeSpec &SS, | |||
8945 | TemplateTy TemplateD, SourceLocation TemplateNameLoc, | |||
8946 | SourceLocation LAngleLoc, ASTTemplateArgsPtr TemplateArgsIn, | |||
8947 | SourceLocation RAngleLoc, const ParsedAttributesView &Attr) { | |||
8948 | // Find the class template we're specializing | |||
8949 | TemplateName Name = TemplateD.get(); | |||
8950 | TemplateDecl *TD = Name.getAsTemplateDecl(); | |||
8951 | // Check that the specialization uses the same tag kind as the | |||
8952 | // original template. | |||
8953 | TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec); | |||
8954 | assert(Kind != TTK_Enum &&((Kind != TTK_Enum && "Invalid enum tag in class template explicit instantiation!" ) ? static_cast<void> (0) : __assert_fail ("Kind != TTK_Enum && \"Invalid enum tag in class template explicit instantiation!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8955, __PRETTY_FUNCTION__)) | |||
8955 | "Invalid enum tag in class template explicit instantiation!")((Kind != TTK_Enum && "Invalid enum tag in class template explicit instantiation!" ) ? static_cast<void> (0) : __assert_fail ("Kind != TTK_Enum && \"Invalid enum tag in class template explicit instantiation!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 8955, __PRETTY_FUNCTION__)); | |||
8956 | ||||
8957 | ClassTemplateDecl *ClassTemplate = dyn_cast<ClassTemplateDecl>(TD); | |||
8958 | ||||
8959 | if (!ClassTemplate) { | |||
8960 | NonTagKind NTK = getNonTagTypeDeclKind(TD, Kind); | |||
8961 | Diag(TemplateNameLoc, diag::err_tag_reference_non_tag) << TD << NTK << Kind; | |||
8962 | Diag(TD->getLocation(), diag::note_previous_use); | |||
8963 | return true; | |||
8964 | } | |||
8965 | ||||
8966 | if (!isAcceptableTagRedeclaration(ClassTemplate->getTemplatedDecl(), | |||
8967 | Kind, /*isDefinition*/false, KWLoc, | |||
8968 | ClassTemplate->getIdentifier())) { | |||
8969 | Diag(KWLoc, diag::err_use_with_wrong_tag) | |||
8970 | << ClassTemplate | |||
8971 | << FixItHint::CreateReplacement(KWLoc, | |||
8972 | ClassTemplate->getTemplatedDecl()->getKindName()); | |||
8973 | Diag(ClassTemplate->getTemplatedDecl()->getLocation(), | |||
8974 | diag::note_previous_use); | |||
8975 | Kind = ClassTemplate->getTemplatedDecl()->getTagKind(); | |||
8976 | } | |||
8977 | ||||
8978 | // C++0x [temp.explicit]p2: | |||
8979 | // There are two forms of explicit instantiation: an explicit instantiation | |||
8980 | // definition and an explicit instantiation declaration. An explicit | |||
8981 | // instantiation declaration begins with the extern keyword. [...] | |||
8982 | TemplateSpecializationKind TSK = ExternLoc.isInvalid() | |||
8983 | ? TSK_ExplicitInstantiationDefinition | |||
8984 | : TSK_ExplicitInstantiationDeclaration; | |||
8985 | ||||
8986 | if (TSK == TSK_ExplicitInstantiationDeclaration && | |||
8987 | !Context.getTargetInfo().getTriple().isWindowsGNUEnvironment()) { | |||
8988 | // Check for dllexport class template instantiation declarations, | |||
8989 | // except for MinGW mode. | |||
8990 | for (const ParsedAttr &AL : Attr) { | |||
8991 | if (AL.getKind() == ParsedAttr::AT_DLLExport) { | |||
8992 | Diag(ExternLoc, | |||
8993 | diag::warn_attribute_dllexport_explicit_instantiation_decl); | |||
8994 | Diag(AL.getLoc(), diag::note_attribute); | |||
8995 | break; | |||
8996 | } | |||
8997 | } | |||
8998 | ||||
8999 | if (auto *A = ClassTemplate->getTemplatedDecl()->getAttr<DLLExportAttr>()) { | |||
9000 | Diag(ExternLoc, | |||
9001 | diag::warn_attribute_dllexport_explicit_instantiation_decl); | |||
9002 | Diag(A->getLocation(), diag::note_attribute); | |||
9003 | } | |||
9004 | } | |||
9005 | ||||
9006 | // In MSVC mode, dllimported explicit instantiation definitions are treated as | |||
9007 | // instantiation declarations for most purposes. | |||
9008 | bool DLLImportExplicitInstantiationDef = false; | |||
9009 | if (TSK == TSK_ExplicitInstantiationDefinition && | |||
9010 | Context.getTargetInfo().getCXXABI().isMicrosoft()) { | |||
9011 | // Check for dllimport class template instantiation definitions. | |||
9012 | bool DLLImport = | |||
9013 | ClassTemplate->getTemplatedDecl()->getAttr<DLLImportAttr>(); | |||
9014 | for (const ParsedAttr &AL : Attr) { | |||
9015 | if (AL.getKind() == ParsedAttr::AT_DLLImport) | |||
9016 | DLLImport = true; | |||
9017 | if (AL.getKind() == ParsedAttr::AT_DLLExport) { | |||
9018 | // dllexport trumps dllimport here. | |||
9019 | DLLImport = false; | |||
9020 | break; | |||
9021 | } | |||
9022 | } | |||
9023 | if (DLLImport) { | |||
9024 | TSK = TSK_ExplicitInstantiationDeclaration; | |||
9025 | DLLImportExplicitInstantiationDef = true; | |||
9026 | } | |||
9027 | } | |||
9028 | ||||
9029 | // Translate the parser's template argument list in our AST format. | |||
9030 | TemplateArgumentListInfo TemplateArgs(LAngleLoc, RAngleLoc); | |||
9031 | translateTemplateArguments(TemplateArgsIn, TemplateArgs); | |||
9032 | ||||
9033 | // Check that the template argument list is well-formed for this | |||
9034 | // template. | |||
9035 | SmallVector<TemplateArgument, 4> Converted; | |||
9036 | if (CheckTemplateArgumentList(ClassTemplate, TemplateNameLoc, | |||
9037 | TemplateArgs, false, Converted)) | |||
9038 | return true; | |||
9039 | ||||
9040 | // Find the class template specialization declaration that | |||
9041 | // corresponds to these arguments. | |||
9042 | void *InsertPos = nullptr; | |||
9043 | ClassTemplateSpecializationDecl *PrevDecl | |||
9044 | = ClassTemplate->findSpecialization(Converted, InsertPos); | |||
9045 | ||||
9046 | TemplateSpecializationKind PrevDecl_TSK | |||
9047 | = PrevDecl ? PrevDecl->getTemplateSpecializationKind() : TSK_Undeclared; | |||
9048 | ||||
9049 | if (TSK == TSK_ExplicitInstantiationDefinition && PrevDecl != nullptr && | |||
9050 | Context.getTargetInfo().getTriple().isWindowsGNUEnvironment()) { | |||
9051 | // Check for dllexport class template instantiation definitions in MinGW | |||
9052 | // mode, if a previous declaration of the instantiation was seen. | |||
9053 | for (const ParsedAttr &AL : Attr) { | |||
9054 | if (AL.getKind() == ParsedAttr::AT_DLLExport) { | |||
9055 | Diag(AL.getLoc(), | |||
9056 | diag::warn_attribute_dllexport_explicit_instantiation_def); | |||
9057 | break; | |||
9058 | } | |||
9059 | } | |||
9060 | } | |||
9061 | ||||
9062 | if (CheckExplicitInstantiation(*this, ClassTemplate, TemplateNameLoc, | |||
9063 | SS.isSet(), TSK)) | |||
9064 | return true; | |||
9065 | ||||
9066 | ClassTemplateSpecializationDecl *Specialization = nullptr; | |||
9067 | ||||
9068 | bool HasNoEffect = false; | |||
9069 | if (PrevDecl) { | |||
9070 | if (CheckSpecializationInstantiationRedecl(TemplateNameLoc, TSK, | |||
9071 | PrevDecl, PrevDecl_TSK, | |||
9072 | PrevDecl->getPointOfInstantiation(), | |||
9073 | HasNoEffect)) | |||
9074 | return PrevDecl; | |||
9075 | ||||
9076 | // Even though HasNoEffect == true means that this explicit instantiation | |||
9077 | // has no effect on semantics, we go on to put its syntax in the AST. | |||
9078 | ||||
9079 | if (PrevDecl_TSK == TSK_ImplicitInstantiation || | |||
9080 | PrevDecl_TSK == TSK_Undeclared) { | |||
9081 | // Since the only prior class template specialization with these | |||
9082 | // arguments was referenced but not declared, reuse that | |||
9083 | // declaration node as our own, updating the source location | |||
9084 | // for the template name to reflect our new declaration. | |||
9085 | // (Other source locations will be updated later.) | |||
9086 | Specialization = PrevDecl; | |||
9087 | Specialization->setLocation(TemplateNameLoc); | |||
9088 | PrevDecl = nullptr; | |||
9089 | } | |||
9090 | ||||
9091 | if (PrevDecl_TSK == TSK_ExplicitInstantiationDeclaration && | |||
9092 | DLLImportExplicitInstantiationDef) { | |||
9093 | // The new specialization might add a dllimport attribute. | |||
9094 | HasNoEffect = false; | |||
9095 | } | |||
9096 | } | |||
9097 | ||||
9098 | if (!Specialization) { | |||
9099 | // Create a new class template specialization declaration node for | |||
9100 | // this explicit specialization. | |||
9101 | Specialization | |||
9102 | = ClassTemplateSpecializationDecl::Create(Context, Kind, | |||
9103 | ClassTemplate->getDeclContext(), | |||
9104 | KWLoc, TemplateNameLoc, | |||
9105 | ClassTemplate, | |||
9106 | Converted, | |||
9107 | PrevDecl); | |||
9108 | SetNestedNameSpecifier(*this, Specialization, SS); | |||
9109 | ||||
9110 | if (!HasNoEffect && !PrevDecl) { | |||
9111 | // Insert the new specialization. | |||
9112 | ClassTemplate->AddSpecialization(Specialization, InsertPos); | |||
9113 | } | |||
9114 | } | |||
9115 | ||||
9116 | // Build the fully-sugared type for this explicit instantiation as | |||
9117 | // the user wrote in the explicit instantiation itself. This means | |||
9118 | // that we'll pretty-print the type retrieved from the | |||
9119 | // specialization's declaration the way that the user actually wrote | |||
9120 | // the explicit instantiation, rather than formatting the name based | |||
9121 | // on the "canonical" representation used to store the template | |||
9122 | // arguments in the specialization. | |||
9123 | TypeSourceInfo *WrittenTy | |||
9124 | = Context.getTemplateSpecializationTypeInfo(Name, TemplateNameLoc, | |||
9125 | TemplateArgs, | |||
9126 | Context.getTypeDeclType(Specialization)); | |||
9127 | Specialization->setTypeAsWritten(WrittenTy); | |||
9128 | ||||
9129 | // Set source locations for keywords. | |||
9130 | Specialization->setExternLoc(ExternLoc); | |||
9131 | Specialization->setTemplateKeywordLoc(TemplateLoc); | |||
9132 | Specialization->setBraceRange(SourceRange()); | |||
9133 | ||||
9134 | bool PreviouslyDLLExported = Specialization->hasAttr<DLLExportAttr>(); | |||
9135 | ProcessDeclAttributeList(S, Specialization, Attr); | |||
9136 | ||||
9137 | // Add the explicit instantiation into its lexical context. However, | |||
9138 | // since explicit instantiations are never found by name lookup, we | |||
9139 | // just put it into the declaration context directly. | |||
9140 | Specialization->setLexicalDeclContext(CurContext); | |||
9141 | CurContext->addDecl(Specialization); | |||
9142 | ||||
9143 | // Syntax is now OK, so return if it has no other effect on semantics. | |||
9144 | if (HasNoEffect) { | |||
9145 | // Set the template specialization kind. | |||
9146 | Specialization->setTemplateSpecializationKind(TSK); | |||
9147 | return Specialization; | |||
9148 | } | |||
9149 | ||||
9150 | // C++ [temp.explicit]p3: | |||
9151 | // A definition of a class template or class member template | |||
9152 | // shall be in scope at the point of the explicit instantiation of | |||
9153 | // the class template or class member template. | |||
9154 | // | |||
9155 | // This check comes when we actually try to perform the | |||
9156 | // instantiation. | |||
9157 | ClassTemplateSpecializationDecl *Def | |||
9158 | = cast_or_null<ClassTemplateSpecializationDecl>( | |||
9159 | Specialization->getDefinition()); | |||
9160 | if (!Def) | |||
9161 | InstantiateClassTemplateSpecialization(TemplateNameLoc, Specialization, TSK); | |||
9162 | else if (TSK == TSK_ExplicitInstantiationDefinition) { | |||
9163 | MarkVTableUsed(TemplateNameLoc, Specialization, true); | |||
9164 | Specialization->setPointOfInstantiation(Def->getPointOfInstantiation()); | |||
9165 | } | |||
9166 | ||||
9167 | // Instantiate the members of this class template specialization. | |||
9168 | Def = cast_or_null<ClassTemplateSpecializationDecl>( | |||
9169 | Specialization->getDefinition()); | |||
9170 | if (Def) { | |||
9171 | TemplateSpecializationKind Old_TSK = Def->getTemplateSpecializationKind(); | |||
9172 | // Fix a TSK_ExplicitInstantiationDeclaration followed by a | |||
9173 | // TSK_ExplicitInstantiationDefinition | |||
9174 | if (Old_TSK == TSK_ExplicitInstantiationDeclaration && | |||
9175 | (TSK == TSK_ExplicitInstantiationDefinition || | |||
9176 | DLLImportExplicitInstantiationDef)) { | |||
9177 | // FIXME: Need to notify the ASTMutationListener that we did this. | |||
9178 | Def->setTemplateSpecializationKind(TSK); | |||
9179 | ||||
9180 | if (!getDLLAttr(Def) && getDLLAttr(Specialization) && | |||
9181 | (Context.getTargetInfo().getCXXABI().isMicrosoft() || | |||
9182 | Context.getTargetInfo().getTriple().isWindowsItaniumEnvironment())) { | |||
9183 | // In the MS ABI, an explicit instantiation definition can add a dll | |||
9184 | // attribute to a template with a previous instantiation declaration. | |||
9185 | // MinGW doesn't allow this. | |||
9186 | auto *A = cast<InheritableAttr>( | |||
9187 | getDLLAttr(Specialization)->clone(getASTContext())); | |||
9188 | A->setInherited(true); | |||
9189 | Def->addAttr(A); | |||
9190 | dllExportImportClassTemplateSpecialization(*this, Def); | |||
9191 | } | |||
9192 | } | |||
9193 | ||||
9194 | // Fix a TSK_ImplicitInstantiation followed by a | |||
9195 | // TSK_ExplicitInstantiationDefinition | |||
9196 | bool NewlyDLLExported = | |||
9197 | !PreviouslyDLLExported && Specialization->hasAttr<DLLExportAttr>(); | |||
9198 | if (Old_TSK == TSK_ImplicitInstantiation && NewlyDLLExported && | |||
9199 | (Context.getTargetInfo().getCXXABI().isMicrosoft() || | |||
9200 | Context.getTargetInfo().getTriple().isWindowsItaniumEnvironment())) { | |||
9201 | // In the MS ABI, an explicit instantiation definition can add a dll | |||
9202 | // attribute to a template with a previous implicit instantiation. | |||
9203 | // MinGW doesn't allow this. We limit clang to only adding dllexport, to | |||
9204 | // avoid potentially strange codegen behavior. For example, if we extend | |||
9205 | // this conditional to dllimport, and we have a source file calling a | |||
9206 | // method on an implicitly instantiated template class instance and then | |||
9207 | // declaring a dllimport explicit instantiation definition for the same | |||
9208 | // template class, the codegen for the method call will not respect the | |||
9209 | // dllimport, while it will with cl. The Def will already have the DLL | |||
9210 | // attribute, since the Def and Specialization will be the same in the | |||
9211 | // case of Old_TSK == TSK_ImplicitInstantiation, and we already added the | |||
9212 | // attribute to the Specialization; we just need to make it take effect. | |||
9213 | assert(Def == Specialization &&((Def == Specialization && "Def and Specialization should match for implicit instantiation" ) ? static_cast<void> (0) : __assert_fail ("Def == Specialization && \"Def and Specialization should match for implicit instantiation\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 9214, __PRETTY_FUNCTION__)) | |||
9214 | "Def and Specialization should match for implicit instantiation")((Def == Specialization && "Def and Specialization should match for implicit instantiation" ) ? static_cast<void> (0) : __assert_fail ("Def == Specialization && \"Def and Specialization should match for implicit instantiation\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 9214, __PRETTY_FUNCTION__)); | |||
9215 | dllExportImportClassTemplateSpecialization(*this, Def); | |||
9216 | } | |||
9217 | ||||
9218 | // In MinGW mode, export the template instantiation if the declaration | |||
9219 | // was marked dllexport. | |||
9220 | if (PrevDecl_TSK == TSK_ExplicitInstantiationDeclaration && | |||
9221 | Context.getTargetInfo().getTriple().isWindowsGNUEnvironment() && | |||
9222 | PrevDecl->hasAttr<DLLExportAttr>()) { | |||
9223 | dllExportImportClassTemplateSpecialization(*this, Def); | |||
9224 | } | |||
9225 | ||||
9226 | // Set the template specialization kind. Make sure it is set before | |||
9227 | // instantiating the members which will trigger ASTConsumer callbacks. | |||
9228 | Specialization->setTemplateSpecializationKind(TSK); | |||
9229 | InstantiateClassTemplateSpecializationMembers(TemplateNameLoc, Def, TSK); | |||
9230 | } else { | |||
9231 | ||||
9232 | // Set the template specialization kind. | |||
9233 | Specialization->setTemplateSpecializationKind(TSK); | |||
9234 | } | |||
9235 | ||||
9236 | return Specialization; | |||
9237 | } | |||
9238 | ||||
9239 | // Explicit instantiation of a member class of a class template. | |||
9240 | DeclResult | |||
9241 | Sema::ActOnExplicitInstantiation(Scope *S, SourceLocation ExternLoc, | |||
9242 | SourceLocation TemplateLoc, unsigned TagSpec, | |||
9243 | SourceLocation KWLoc, CXXScopeSpec &SS, | |||
9244 | IdentifierInfo *Name, SourceLocation NameLoc, | |||
9245 | const ParsedAttributesView &Attr) { | |||
9246 | ||||
9247 | bool Owned = false; | |||
9248 | bool IsDependent = false; | |||
9249 | Decl *TagD = ActOnTag(S, TagSpec, Sema::TUK_Reference, | |||
9250 | KWLoc, SS, Name, NameLoc, Attr, AS_none, | |||
9251 | /*ModulePrivateLoc=*/SourceLocation(), | |||
9252 | MultiTemplateParamsArg(), Owned, IsDependent, | |||
9253 | SourceLocation(), false, TypeResult(), | |||
9254 | /*IsTypeSpecifier*/false, | |||
9255 | /*IsTemplateParamOrArg*/false); | |||
9256 | assert(!IsDependent && "explicit instantiation of dependent name not yet handled")((!IsDependent && "explicit instantiation of dependent name not yet handled" ) ? static_cast<void> (0) : __assert_fail ("!IsDependent && \"explicit instantiation of dependent name not yet handled\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 9256, __PRETTY_FUNCTION__)); | |||
9257 | ||||
9258 | if (!TagD) | |||
9259 | return true; | |||
9260 | ||||
9261 | TagDecl *Tag = cast<TagDecl>(TagD); | |||
9262 | assert(!Tag->isEnum() && "shouldn't see enumerations here")((!Tag->isEnum() && "shouldn't see enumerations here" ) ? static_cast<void> (0) : __assert_fail ("!Tag->isEnum() && \"shouldn't see enumerations here\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 9262, __PRETTY_FUNCTION__)); | |||
9263 | ||||
9264 | if (Tag->isInvalidDecl()) | |||
9265 | return true; | |||
9266 | ||||
9267 | CXXRecordDecl *Record = cast<CXXRecordDecl>(Tag); | |||
9268 | CXXRecordDecl *Pattern = Record->getInstantiatedFromMemberClass(); | |||
9269 | if (!Pattern) { | |||
9270 | Diag(TemplateLoc, diag::err_explicit_instantiation_nontemplate_type) | |||
9271 | << Context.getTypeDeclType(Record); | |||
9272 | Diag(Record->getLocation(), diag::note_nontemplate_decl_here); | |||
9273 | return true; | |||
9274 | } | |||
9275 | ||||
9276 | // C++0x [temp.explicit]p2: | |||
9277 | // If the explicit instantiation is for a class or member class, the | |||
9278 | // elaborated-type-specifier in the declaration shall include a | |||
9279 | // simple-template-id. | |||
9280 | // | |||
9281 | // C++98 has the same restriction, just worded differently. | |||
9282 | if (!ScopeSpecifierHasTemplateId(SS)) | |||
9283 | Diag(TemplateLoc, diag::ext_explicit_instantiation_without_qualified_id) | |||
9284 | << Record << SS.getRange(); | |||
9285 | ||||
9286 | // C++0x [temp.explicit]p2: | |||
9287 | // There are two forms of explicit instantiation: an explicit instantiation | |||
9288 | // definition and an explicit instantiation declaration. An explicit | |||
9289 | // instantiation declaration begins with the extern keyword. [...] | |||
9290 | TemplateSpecializationKind TSK | |||
9291 | = ExternLoc.isInvalid()? TSK_ExplicitInstantiationDefinition | |||
9292 | : TSK_ExplicitInstantiationDeclaration; | |||
9293 | ||||
9294 | CheckExplicitInstantiation(*this, Record, NameLoc, true, TSK); | |||
9295 | ||||
9296 | // Verify that it is okay to explicitly instantiate here. | |||
9297 | CXXRecordDecl *PrevDecl | |||
9298 | = cast_or_null<CXXRecordDecl>(Record->getPreviousDecl()); | |||
9299 | if (!PrevDecl && Record->getDefinition()) | |||
9300 | PrevDecl = Record; | |||
9301 | if (PrevDecl) { | |||
9302 | MemberSpecializationInfo *MSInfo = PrevDecl->getMemberSpecializationInfo(); | |||
9303 | bool HasNoEffect = false; | |||
9304 | assert(MSInfo && "No member specialization information?")((MSInfo && "No member specialization information?") ? static_cast<void> (0) : __assert_fail ("MSInfo && \"No member specialization information?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 9304, __PRETTY_FUNCTION__)); | |||
9305 | if (CheckSpecializationInstantiationRedecl(TemplateLoc, TSK, | |||
9306 | PrevDecl, | |||
9307 | MSInfo->getTemplateSpecializationKind(), | |||
9308 | MSInfo->getPointOfInstantiation(), | |||
9309 | HasNoEffect)) | |||
9310 | return true; | |||
9311 | if (HasNoEffect) | |||
9312 | return TagD; | |||
9313 | } | |||
9314 | ||||
9315 | CXXRecordDecl *RecordDef | |||
9316 | = cast_or_null<CXXRecordDecl>(Record->getDefinition()); | |||
9317 | if (!RecordDef) { | |||
9318 | // C++ [temp.explicit]p3: | |||
9319 | // A definition of a member class of a class template shall be in scope | |||
9320 | // at the point of an explicit instantiation of the member class. | |||
9321 | CXXRecordDecl *Def | |||
9322 | = cast_or_null<CXXRecordDecl>(Pattern->getDefinition()); | |||
9323 | if (!Def) { | |||
9324 | Diag(TemplateLoc, diag::err_explicit_instantiation_undefined_member) | |||
9325 | << 0 << Record->getDeclName() << Record->getDeclContext(); | |||
9326 | Diag(Pattern->getLocation(), diag::note_forward_declaration) | |||
9327 | << Pattern; | |||
9328 | return true; | |||
9329 | } else { | |||
9330 | if (InstantiateClass(NameLoc, Record, Def, | |||
9331 | getTemplateInstantiationArgs(Record), | |||
9332 | TSK)) | |||
9333 | return true; | |||
9334 | ||||
9335 | RecordDef = cast_or_null<CXXRecordDecl>(Record->getDefinition()); | |||
9336 | if (!RecordDef) | |||
9337 | return true; | |||
9338 | } | |||
9339 | } | |||
9340 | ||||
9341 | // Instantiate all of the members of the class. | |||
9342 | InstantiateClassMembers(NameLoc, RecordDef, | |||
9343 | getTemplateInstantiationArgs(Record), TSK); | |||
9344 | ||||
9345 | if (TSK == TSK_ExplicitInstantiationDefinition) | |||
9346 | MarkVTableUsed(NameLoc, RecordDef, true); | |||
9347 | ||||
9348 | // FIXME: We don't have any representation for explicit instantiations of | |||
9349 | // member classes. Such a representation is not needed for compilation, but it | |||
9350 | // should be available for clients that want to see all of the declarations in | |||
9351 | // the source code. | |||
9352 | return TagD; | |||
9353 | } | |||
9354 | ||||
9355 | DeclResult Sema::ActOnExplicitInstantiation(Scope *S, | |||
9356 | SourceLocation ExternLoc, | |||
9357 | SourceLocation TemplateLoc, | |||
9358 | Declarator &D) { | |||
9359 | // Explicit instantiations always require a name. | |||
9360 | // TODO: check if/when DNInfo should replace Name. | |||
9361 | DeclarationNameInfo NameInfo = GetNameForDeclarator(D); | |||
9362 | DeclarationName Name = NameInfo.getName(); | |||
9363 | if (!Name) { | |||
9364 | if (!D.isInvalidType()) | |||
9365 | Diag(D.getDeclSpec().getBeginLoc(), | |||
9366 | diag::err_explicit_instantiation_requires_name) | |||
9367 | << D.getDeclSpec().getSourceRange() << D.getSourceRange(); | |||
9368 | ||||
9369 | return true; | |||
9370 | } | |||
9371 | ||||
9372 | // The scope passed in may not be a decl scope. Zip up the scope tree until | |||
9373 | // we find one that is. | |||
9374 | while ((S->getFlags() & Scope::DeclScope) == 0 || | |||
9375 | (S->getFlags() & Scope::TemplateParamScope) != 0) | |||
9376 | S = S->getParent(); | |||
9377 | ||||
9378 | // Determine the type of the declaration. | |||
9379 | TypeSourceInfo *T = GetTypeForDeclarator(D, S); | |||
9380 | QualType R = T->getType(); | |||
9381 | if (R.isNull()) | |||
9382 | return true; | |||
9383 | ||||
9384 | // C++ [dcl.stc]p1: | |||
9385 | // A storage-class-specifier shall not be specified in [...] an explicit | |||
9386 | // instantiation (14.7.2) directive. | |||
9387 | if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) { | |||
9388 | Diag(D.getIdentifierLoc(), diag::err_explicit_instantiation_of_typedef) | |||
9389 | << Name; | |||
9390 | return true; | |||
9391 | } else if (D.getDeclSpec().getStorageClassSpec() | |||
9392 | != DeclSpec::SCS_unspecified) { | |||
9393 | // Complain about then remove the storage class specifier. | |||
9394 | Diag(D.getIdentifierLoc(), diag::err_explicit_instantiation_storage_class) | |||
9395 | << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc()); | |||
9396 | ||||
9397 | D.getMutableDeclSpec().ClearStorageClassSpecs(); | |||
9398 | } | |||
9399 | ||||
9400 | // C++0x [temp.explicit]p1: | |||
9401 | // [...] An explicit instantiation of a function template shall not use the | |||
9402 | // inline or constexpr specifiers. | |||
9403 | // Presumably, this also applies to member functions of class templates as | |||
9404 | // well. | |||
9405 | if (D.getDeclSpec().isInlineSpecified()) | |||
9406 | Diag(D.getDeclSpec().getInlineSpecLoc(), | |||
9407 | getLangOpts().CPlusPlus11 ? | |||
9408 | diag::err_explicit_instantiation_inline : | |||
9409 | diag::warn_explicit_instantiation_inline_0x) | |||
9410 | << FixItHint::CreateRemoval(D.getDeclSpec().getInlineSpecLoc()); | |||
9411 | if (D.getDeclSpec().hasConstexprSpecifier() && R->isFunctionType()) | |||
9412 | // FIXME: Add a fix-it to remove the 'constexpr' and add a 'const' if one is | |||
9413 | // not already specified. | |||
9414 | Diag(D.getDeclSpec().getConstexprSpecLoc(), | |||
9415 | diag::err_explicit_instantiation_constexpr); | |||
9416 | ||||
9417 | // A deduction guide is not on the list of entities that can be explicitly | |||
9418 | // instantiated. | |||
9419 | if (Name.getNameKind() == DeclarationName::CXXDeductionGuideName) { | |||
9420 | Diag(D.getDeclSpec().getBeginLoc(), diag::err_deduction_guide_specialized) | |||
9421 | << /*explicit instantiation*/ 0; | |||
9422 | return true; | |||
9423 | } | |||
9424 | ||||
9425 | // C++0x [temp.explicit]p2: | |||
9426 | // There are two forms of explicit instantiation: an explicit instantiation | |||
9427 | // definition and an explicit instantiation declaration. An explicit | |||
9428 | // instantiation declaration begins with the extern keyword. [...] | |||
9429 | TemplateSpecializationKind TSK | |||
9430 | = ExternLoc.isInvalid()? TSK_ExplicitInstantiationDefinition | |||
9431 | : TSK_ExplicitInstantiationDeclaration; | |||
9432 | ||||
9433 | LookupResult Previous(*this, NameInfo, LookupOrdinaryName); | |||
9434 | LookupParsedName(Previous, S, &D.getCXXScopeSpec()); | |||
9435 | ||||
9436 | if (!R->isFunctionType()) { | |||
9437 | // C++ [temp.explicit]p1: | |||
9438 | // A [...] static data member of a class template can be explicitly | |||
9439 | // instantiated from the member definition associated with its class | |||
9440 | // template. | |||
9441 | // C++1y [temp.explicit]p1: | |||
9442 | // A [...] variable [...] template specialization can be explicitly | |||
9443 | // instantiated from its template. | |||
9444 | if (Previous.isAmbiguous()) | |||
9445 | return true; | |||
9446 | ||||
9447 | VarDecl *Prev = Previous.getAsSingle<VarDecl>(); | |||
9448 | VarTemplateDecl *PrevTemplate = Previous.getAsSingle<VarTemplateDecl>(); | |||
9449 | ||||
9450 | if (!PrevTemplate) { | |||
9451 | if (!Prev || !Prev->isStaticDataMember()) { | |||
9452 | // We expect to see a static data member here. | |||
9453 | Diag(D.getIdentifierLoc(), diag::err_explicit_instantiation_not_known) | |||
9454 | << Name; | |||
9455 | for (LookupResult::iterator P = Previous.begin(), PEnd = Previous.end(); | |||
9456 | P != PEnd; ++P) | |||
9457 | Diag((*P)->getLocation(), diag::note_explicit_instantiation_here); | |||
9458 | return true; | |||
9459 | } | |||
9460 | ||||
9461 | if (!Prev->getInstantiatedFromStaticDataMember()) { | |||
9462 | // FIXME: Check for explicit specialization? | |||
9463 | Diag(D.getIdentifierLoc(), | |||
9464 | diag::err_explicit_instantiation_data_member_not_instantiated) | |||
9465 | << Prev; | |||
9466 | Diag(Prev->getLocation(), diag::note_explicit_instantiation_here); | |||
9467 | // FIXME: Can we provide a note showing where this was declared? | |||
9468 | return true; | |||
9469 | } | |||
9470 | } else { | |||
9471 | // Explicitly instantiate a variable template. | |||
9472 | ||||
9473 | // C++1y [dcl.spec.auto]p6: | |||
9474 | // ... A program that uses auto or decltype(auto) in a context not | |||
9475 | // explicitly allowed in this section is ill-formed. | |||
9476 | // | |||
9477 | // This includes auto-typed variable template instantiations. | |||
9478 | if (R->isUndeducedType()) { | |||
9479 | Diag(T->getTypeLoc().getBeginLoc(), | |||
9480 | diag::err_auto_not_allowed_var_inst); | |||
9481 | return true; | |||
9482 | } | |||
9483 | ||||
9484 | if (D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) { | |||
9485 | // C++1y [temp.explicit]p3: | |||
9486 | // If the explicit instantiation is for a variable, the unqualified-id | |||
9487 | // in the declaration shall be a template-id. | |||
9488 | Diag(D.getIdentifierLoc(), | |||
9489 | diag::err_explicit_instantiation_without_template_id) | |||
9490 | << PrevTemplate; | |||
9491 | Diag(PrevTemplate->getLocation(), | |||
9492 | diag::note_explicit_instantiation_here); | |||
9493 | return true; | |||
9494 | } | |||
9495 | ||||
9496 | // Translate the parser's template argument list into our AST format. | |||
9497 | TemplateArgumentListInfo TemplateArgs = | |||
9498 | makeTemplateArgumentListInfo(*this, *D.getName().TemplateId); | |||
9499 | ||||
9500 | DeclResult Res = CheckVarTemplateId(PrevTemplate, TemplateLoc, | |||
9501 | D.getIdentifierLoc(), TemplateArgs); | |||
9502 | if (Res.isInvalid()) | |||
9503 | return true; | |||
9504 | ||||
9505 | // Ignore access control bits, we don't need them for redeclaration | |||
9506 | // checking. | |||
9507 | Prev = cast<VarDecl>(Res.get()); | |||
9508 | } | |||
9509 | ||||
9510 | // C++0x [temp.explicit]p2: | |||
9511 | // If the explicit instantiation is for a member function, a member class | |||
9512 | // or a static data member of a class template specialization, the name of | |||
9513 | // the class template specialization in the qualified-id for the member | |||
9514 | // name shall be a simple-template-id. | |||
9515 | // | |||
9516 | // C++98 has the same restriction, just worded differently. | |||
9517 | // | |||
9518 | // This does not apply to variable template specializations, where the | |||
9519 | // template-id is in the unqualified-id instead. | |||
9520 | if (!ScopeSpecifierHasTemplateId(D.getCXXScopeSpec()) && !PrevTemplate) | |||
9521 | Diag(D.getIdentifierLoc(), | |||
9522 | diag::ext_explicit_instantiation_without_qualified_id) | |||
9523 | << Prev << D.getCXXScopeSpec().getRange(); | |||
9524 | ||||
9525 | CheckExplicitInstantiation(*this, Prev, D.getIdentifierLoc(), true, TSK); | |||
9526 | ||||
9527 | // Verify that it is okay to explicitly instantiate here. | |||
9528 | TemplateSpecializationKind PrevTSK = Prev->getTemplateSpecializationKind(); | |||
9529 | SourceLocation POI = Prev->getPointOfInstantiation(); | |||
9530 | bool HasNoEffect = false; | |||
9531 | if (CheckSpecializationInstantiationRedecl(D.getIdentifierLoc(), TSK, Prev, | |||
9532 | PrevTSK, POI, HasNoEffect)) | |||
9533 | return true; | |||
9534 | ||||
9535 | if (!HasNoEffect) { | |||
9536 | // Instantiate static data member or variable template. | |||
9537 | Prev->setTemplateSpecializationKind(TSK, D.getIdentifierLoc()); | |||
9538 | // Merge attributes. | |||
9539 | ProcessDeclAttributeList(S, Prev, D.getDeclSpec().getAttributes()); | |||
9540 | if (TSK == TSK_ExplicitInstantiationDefinition) | |||
9541 | InstantiateVariableDefinition(D.getIdentifierLoc(), Prev); | |||
9542 | } | |||
9543 | ||||
9544 | // Check the new variable specialization against the parsed input. | |||
9545 | if (PrevTemplate && Prev && !Context.hasSameType(Prev->getType(), R)) { | |||
9546 | Diag(T->getTypeLoc().getBeginLoc(), | |||
9547 | diag::err_invalid_var_template_spec_type) | |||
9548 | << 0 << PrevTemplate << R << Prev->getType(); | |||
9549 | Diag(PrevTemplate->getLocation(), diag::note_template_declared_here) | |||
9550 | << 2 << PrevTemplate->getDeclName(); | |||
9551 | return true; | |||
9552 | } | |||
9553 | ||||
9554 | // FIXME: Create an ExplicitInstantiation node? | |||
9555 | return (Decl*) nullptr; | |||
9556 | } | |||
9557 | ||||
9558 | // If the declarator is a template-id, translate the parser's template | |||
9559 | // argument list into our AST format. | |||
9560 | bool HasExplicitTemplateArgs = false; | |||
9561 | TemplateArgumentListInfo TemplateArgs; | |||
9562 | if (D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId) { | |||
9563 | TemplateArgs = makeTemplateArgumentListInfo(*this, *D.getName().TemplateId); | |||
9564 | HasExplicitTemplateArgs = true; | |||
9565 | } | |||
9566 | ||||
9567 | // C++ [temp.explicit]p1: | |||
9568 | // A [...] function [...] can be explicitly instantiated from its template. | |||
9569 | // A member function [...] of a class template can be explicitly | |||
9570 | // instantiated from the member definition associated with its class | |||
9571 | // template. | |||
9572 | UnresolvedSet<8> TemplateMatches; | |||
9573 | FunctionDecl *NonTemplateMatch = nullptr; | |||
9574 | TemplateSpecCandidateSet FailedCandidates(D.getIdentifierLoc()); | |||
9575 | for (LookupResult::iterator P = Previous.begin(), PEnd = Previous.end(); | |||
9576 | P != PEnd; ++P) { | |||
9577 | NamedDecl *Prev = *P; | |||
9578 | if (!HasExplicitTemplateArgs) { | |||
9579 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(Prev)) { | |||
9580 | QualType Adjusted = adjustCCAndNoReturn(R, Method->getType(), | |||
9581 | /*AdjustExceptionSpec*/true); | |||
9582 | if (Context.hasSameUnqualifiedType(Method->getType(), Adjusted)) { | |||
9583 | if (Method->getPrimaryTemplate()) { | |||
9584 | TemplateMatches.addDecl(Method, P.getAccess()); | |||
9585 | } else { | |||
9586 | // FIXME: Can this assert ever happen? Needs a test. | |||
9587 | assert(!NonTemplateMatch && "Multiple NonTemplateMatches")((!NonTemplateMatch && "Multiple NonTemplateMatches") ? static_cast<void> (0) : __assert_fail ("!NonTemplateMatch && \"Multiple NonTemplateMatches\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 9587, __PRETTY_FUNCTION__)); | |||
9588 | NonTemplateMatch = Method; | |||
9589 | } | |||
9590 | } | |||
9591 | } | |||
9592 | } | |||
9593 | ||||
9594 | FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(Prev); | |||
9595 | if (!FunTmpl) | |||
9596 | continue; | |||
9597 | ||||
9598 | TemplateDeductionInfo Info(FailedCandidates.getLocation()); | |||
9599 | FunctionDecl *Specialization = nullptr; | |||
9600 | if (TemplateDeductionResult TDK | |||
9601 | = DeduceTemplateArguments(FunTmpl, | |||
9602 | (HasExplicitTemplateArgs ? &TemplateArgs | |||
9603 | : nullptr), | |||
9604 | R, Specialization, Info)) { | |||
9605 | // Keep track of almost-matches. | |||
9606 | FailedCandidates.addCandidate() | |||
9607 | .set(P.getPair(), FunTmpl->getTemplatedDecl(), | |||
9608 | MakeDeductionFailureInfo(Context, TDK, Info)); | |||
9609 | (void)TDK; | |||
9610 | continue; | |||
9611 | } | |||
9612 | ||||
9613 | // Target attributes are part of the cuda function signature, so | |||
9614 | // the cuda target of the instantiated function must match that of its | |||
9615 | // template. Given that C++ template deduction does not take | |||
9616 | // target attributes into account, we reject candidates here that | |||
9617 | // have a different target. | |||
9618 | if (LangOpts.CUDA && | |||
9619 | IdentifyCUDATarget(Specialization, | |||
9620 | /* IgnoreImplicitHDAttr = */ true) != | |||
9621 | IdentifyCUDATarget(D.getDeclSpec().getAttributes())) { | |||
9622 | FailedCandidates.addCandidate().set( | |||
9623 | P.getPair(), FunTmpl->getTemplatedDecl(), | |||
9624 | MakeDeductionFailureInfo(Context, TDK_CUDATargetMismatch, Info)); | |||
9625 | continue; | |||
9626 | } | |||
9627 | ||||
9628 | TemplateMatches.addDecl(Specialization, P.getAccess()); | |||
9629 | } | |||
9630 | ||||
9631 | FunctionDecl *Specialization = NonTemplateMatch; | |||
9632 | if (!Specialization) { | |||
9633 | // Find the most specialized function template specialization. | |||
9634 | UnresolvedSetIterator Result = getMostSpecialized( | |||
9635 | TemplateMatches.begin(), TemplateMatches.end(), FailedCandidates, | |||
9636 | D.getIdentifierLoc(), | |||
9637 | PDiag(diag::err_explicit_instantiation_not_known) << Name, | |||
9638 | PDiag(diag::err_explicit_instantiation_ambiguous) << Name, | |||
9639 | PDiag(diag::note_explicit_instantiation_candidate)); | |||
9640 | ||||
9641 | if (Result == TemplateMatches.end()) | |||
9642 | return true; | |||
9643 | ||||
9644 | // Ignore access control bits, we don't need them for redeclaration checking. | |||
9645 | Specialization = cast<FunctionDecl>(*Result); | |||
9646 | } | |||
9647 | ||||
9648 | // C++11 [except.spec]p4 | |||
9649 | // In an explicit instantiation an exception-specification may be specified, | |||
9650 | // but is not required. | |||
9651 | // If an exception-specification is specified in an explicit instantiation | |||
9652 | // directive, it shall be compatible with the exception-specifications of | |||
9653 | // other declarations of that function. | |||
9654 | if (auto *FPT = R->getAs<FunctionProtoType>()) | |||
9655 | if (FPT->hasExceptionSpec()) { | |||
9656 | unsigned DiagID = | |||
9657 | diag::err_mismatched_exception_spec_explicit_instantiation; | |||
9658 | if (getLangOpts().MicrosoftExt) | |||
9659 | DiagID = diag::ext_mismatched_exception_spec_explicit_instantiation; | |||
9660 | bool Result = CheckEquivalentExceptionSpec( | |||
9661 | PDiag(DiagID) << Specialization->getType(), | |||
9662 | PDiag(diag::note_explicit_instantiation_here), | |||
9663 | Specialization->getType()->getAs<FunctionProtoType>(), | |||
9664 | Specialization->getLocation(), FPT, D.getBeginLoc()); | |||
9665 | // In Microsoft mode, mismatching exception specifications just cause a | |||
9666 | // warning. | |||
9667 | if (!getLangOpts().MicrosoftExt && Result) | |||
9668 | return true; | |||
9669 | } | |||
9670 | ||||
9671 | if (Specialization->getTemplateSpecializationKind() == TSK_Undeclared) { | |||
9672 | Diag(D.getIdentifierLoc(), | |||
9673 | diag::err_explicit_instantiation_member_function_not_instantiated) | |||
9674 | << Specialization | |||
9675 | << (Specialization->getTemplateSpecializationKind() == | |||
9676 | TSK_ExplicitSpecialization); | |||
9677 | Diag(Specialization->getLocation(), diag::note_explicit_instantiation_here); | |||
9678 | return true; | |||
9679 | } | |||
9680 | ||||
9681 | FunctionDecl *PrevDecl = Specialization->getPreviousDecl(); | |||
9682 | if (!PrevDecl && Specialization->isThisDeclarationADefinition()) | |||
9683 | PrevDecl = Specialization; | |||
9684 | ||||
9685 | if (PrevDecl) { | |||
9686 | bool HasNoEffect = false; | |||
9687 | if (CheckSpecializationInstantiationRedecl(D.getIdentifierLoc(), TSK, | |||
9688 | PrevDecl, | |||
9689 | PrevDecl->getTemplateSpecializationKind(), | |||
9690 | PrevDecl->getPointOfInstantiation(), | |||
9691 | HasNoEffect)) | |||
9692 | return true; | |||
9693 | ||||
9694 | // FIXME: We may still want to build some representation of this | |||
9695 | // explicit specialization. | |||
9696 | if (HasNoEffect) | |||
9697 | return (Decl*) nullptr; | |||
9698 | } | |||
9699 | ||||
9700 | // HACK: libc++ has a bug where it attempts to explicitly instantiate the | |||
9701 | // functions | |||
9702 | // valarray<size_t>::valarray(size_t) and | |||
9703 | // valarray<size_t>::~valarray() | |||
9704 | // that it declared to have internal linkage with the internal_linkage | |||
9705 | // attribute. Ignore the explicit instantiation declaration in this case. | |||
9706 | if (Specialization->hasAttr<InternalLinkageAttr>() && | |||
9707 | TSK == TSK_ExplicitInstantiationDeclaration) { | |||
9708 | if (auto *RD = dyn_cast<CXXRecordDecl>(Specialization->getDeclContext())) | |||
9709 | if (RD->getIdentifier() && RD->getIdentifier()->isStr("valarray") && | |||
9710 | RD->isInStdNamespace()) | |||
9711 | return (Decl*) nullptr; | |||
9712 | } | |||
9713 | ||||
9714 | ProcessDeclAttributeList(S, Specialization, D.getDeclSpec().getAttributes()); | |||
9715 | ||||
9716 | // In MSVC mode, dllimported explicit instantiation definitions are treated as | |||
9717 | // instantiation declarations. | |||
9718 | if (TSK == TSK_ExplicitInstantiationDefinition && | |||
9719 | Specialization->hasAttr<DLLImportAttr>() && | |||
9720 | Context.getTargetInfo().getCXXABI().isMicrosoft()) | |||
9721 | TSK = TSK_ExplicitInstantiationDeclaration; | |||
9722 | ||||
9723 | Specialization->setTemplateSpecializationKind(TSK, D.getIdentifierLoc()); | |||
9724 | ||||
9725 | if (Specialization->isDefined()) { | |||
9726 | // Let the ASTConsumer know that this function has been explicitly | |||
9727 | // instantiated now, and its linkage might have changed. | |||
9728 | Consumer.HandleTopLevelDecl(DeclGroupRef(Specialization)); | |||
9729 | } else if (TSK == TSK_ExplicitInstantiationDefinition) | |||
9730 | InstantiateFunctionDefinition(D.getIdentifierLoc(), Specialization); | |||
9731 | ||||
9732 | // C++0x [temp.explicit]p2: | |||
9733 | // If the explicit instantiation is for a member function, a member class | |||
9734 | // or a static data member of a class template specialization, the name of | |||
9735 | // the class template specialization in the qualified-id for the member | |||
9736 | // name shall be a simple-template-id. | |||
9737 | // | |||
9738 | // C++98 has the same restriction, just worded differently. | |||
9739 | FunctionTemplateDecl *FunTmpl = Specialization->getPrimaryTemplate(); | |||
9740 | if (D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId && !FunTmpl && | |||
9741 | D.getCXXScopeSpec().isSet() && | |||
9742 | !ScopeSpecifierHasTemplateId(D.getCXXScopeSpec())) | |||
9743 | Diag(D.getIdentifierLoc(), | |||
9744 | diag::ext_explicit_instantiation_without_qualified_id) | |||
9745 | << Specialization << D.getCXXScopeSpec().getRange(); | |||
9746 | ||||
9747 | CheckExplicitInstantiation( | |||
9748 | *this, | |||
9749 | FunTmpl ? (NamedDecl *)FunTmpl | |||
9750 | : Specialization->getInstantiatedFromMemberFunction(), | |||
9751 | D.getIdentifierLoc(), D.getCXXScopeSpec().isSet(), TSK); | |||
9752 | ||||
9753 | // FIXME: Create some kind of ExplicitInstantiationDecl here. | |||
9754 | return (Decl*) nullptr; | |||
9755 | } | |||
9756 | ||||
9757 | TypeResult | |||
9758 | Sema::ActOnDependentTag(Scope *S, unsigned TagSpec, TagUseKind TUK, | |||
9759 | const CXXScopeSpec &SS, IdentifierInfo *Name, | |||
9760 | SourceLocation TagLoc, SourceLocation NameLoc) { | |||
9761 | // This has to hold, because SS is expected to be defined. | |||
9762 | assert(Name && "Expected a name in a dependent tag")((Name && "Expected a name in a dependent tag") ? static_cast <void> (0) : __assert_fail ("Name && \"Expected a name in a dependent tag\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 9762, __PRETTY_FUNCTION__)); | |||
9763 | ||||
9764 | NestedNameSpecifier *NNS = SS.getScopeRep(); | |||
9765 | if (!NNS) | |||
9766 | return true; | |||
9767 | ||||
9768 | TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec); | |||
9769 | ||||
9770 | if (TUK == TUK_Declaration || TUK == TUK_Definition) { | |||
9771 | Diag(NameLoc, diag::err_dependent_tag_decl) | |||
9772 | << (TUK == TUK_Definition) << Kind << SS.getRange(); | |||
9773 | return true; | |||
9774 | } | |||
9775 | ||||
9776 | // Create the resulting type. | |||
9777 | ElaboratedTypeKeyword Kwd = TypeWithKeyword::getKeywordForTagTypeKind(Kind); | |||
9778 | QualType Result = Context.getDependentNameType(Kwd, NNS, Name); | |||
9779 | ||||
9780 | // Create type-source location information for this type. | |||
9781 | TypeLocBuilder TLB; | |||
9782 | DependentNameTypeLoc TL = TLB.push<DependentNameTypeLoc>(Result); | |||
9783 | TL.setElaboratedKeywordLoc(TagLoc); | |||
9784 | TL.setQualifierLoc(SS.getWithLocInContext(Context)); | |||
9785 | TL.setNameLoc(NameLoc); | |||
9786 | return CreateParsedType(Result, TLB.getTypeSourceInfo(Context, Result)); | |||
9787 | } | |||
9788 | ||||
9789 | TypeResult | |||
9790 | Sema::ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, | |||
9791 | const CXXScopeSpec &SS, const IdentifierInfo &II, | |||
9792 | SourceLocation IdLoc) { | |||
9793 | if (SS.isInvalid()) | |||
9794 | return true; | |||
9795 | ||||
9796 | if (TypenameLoc.isValid() && S && !S->getTemplateParamParent()) | |||
9797 | Diag(TypenameLoc, | |||
9798 | getLangOpts().CPlusPlus11 ? | |||
9799 | diag::warn_cxx98_compat_typename_outside_of_template : | |||
9800 | diag::ext_typename_outside_of_template) | |||
9801 | << FixItHint::CreateRemoval(TypenameLoc); | |||
9802 | ||||
9803 | NestedNameSpecifierLoc QualifierLoc = SS.getWithLocInContext(Context); | |||
9804 | QualType T = CheckTypenameType(TypenameLoc.isValid()? ETK_Typename : ETK_None, | |||
9805 | TypenameLoc, QualifierLoc, II, IdLoc); | |||
9806 | if (T.isNull()) | |||
9807 | return true; | |||
9808 | ||||
9809 | TypeSourceInfo *TSI = Context.CreateTypeSourceInfo(T); | |||
9810 | if (isa<DependentNameType>(T)) { | |||
9811 | DependentNameTypeLoc TL = TSI->getTypeLoc().castAs<DependentNameTypeLoc>(); | |||
9812 | TL.setElaboratedKeywordLoc(TypenameLoc); | |||
9813 | TL.setQualifierLoc(QualifierLoc); | |||
9814 | TL.setNameLoc(IdLoc); | |||
9815 | } else { | |||
9816 | ElaboratedTypeLoc TL = TSI->getTypeLoc().castAs<ElaboratedTypeLoc>(); | |||
9817 | TL.setElaboratedKeywordLoc(TypenameLoc); | |||
9818 | TL.setQualifierLoc(QualifierLoc); | |||
9819 | TL.getNamedTypeLoc().castAs<TypeSpecTypeLoc>().setNameLoc(IdLoc); | |||
9820 | } | |||
9821 | ||||
9822 | return CreateParsedType(T, TSI); | |||
9823 | } | |||
9824 | ||||
9825 | TypeResult | |||
9826 | Sema::ActOnTypenameType(Scope *S, | |||
9827 | SourceLocation TypenameLoc, | |||
9828 | const CXXScopeSpec &SS, | |||
9829 | SourceLocation TemplateKWLoc, | |||
9830 | TemplateTy TemplateIn, | |||
9831 | IdentifierInfo *TemplateII, | |||
9832 | SourceLocation TemplateIILoc, | |||
9833 | SourceLocation LAngleLoc, | |||
9834 | ASTTemplateArgsPtr TemplateArgsIn, | |||
9835 | SourceLocation RAngleLoc) { | |||
9836 | if (TypenameLoc.isValid() && S && !S->getTemplateParamParent()) | |||
9837 | Diag(TypenameLoc, | |||
9838 | getLangOpts().CPlusPlus11 ? | |||
9839 | diag::warn_cxx98_compat_typename_outside_of_template : | |||
9840 | diag::ext_typename_outside_of_template) | |||
9841 | << FixItHint::CreateRemoval(TypenameLoc); | |||
9842 | ||||
9843 | // Strangely, non-type results are not ignored by this lookup, so the | |||
9844 | // program is ill-formed if it finds an injected-class-name. | |||
9845 | if (TypenameLoc.isValid()) { | |||
9846 | auto *LookupRD = | |||
9847 | dyn_cast_or_null<CXXRecordDecl>(computeDeclContext(SS, false)); | |||
9848 | if (LookupRD && LookupRD->getIdentifier() == TemplateII) { | |||
9849 | Diag(TemplateIILoc, | |||
9850 | diag::ext_out_of_line_qualified_id_type_names_constructor) | |||
9851 | << TemplateII << 0 /*injected-class-name used as template name*/ | |||
9852 | << (TemplateKWLoc.isValid() ? 1 : 0 /*'template'/'typename' keyword*/); | |||
9853 | } | |||
9854 | } | |||
9855 | ||||
9856 | // Translate the parser's template argument list in our AST format. | |||
9857 | TemplateArgumentListInfo TemplateArgs(LAngleLoc, RAngleLoc); | |||
9858 | translateTemplateArguments(TemplateArgsIn, TemplateArgs); | |||
9859 | ||||
9860 | TemplateName Template = TemplateIn.get(); | |||
9861 | if (DependentTemplateName *DTN = Template.getAsDependentTemplateName()) { | |||
9862 | // Construct a dependent template specialization type. | |||
9863 | assert(DTN && "dependent template has non-dependent name?")((DTN && "dependent template has non-dependent name?" ) ? static_cast<void> (0) : __assert_fail ("DTN && \"dependent template has non-dependent name?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 9863, __PRETTY_FUNCTION__)); | |||
9864 | assert(DTN->getQualifier() == SS.getScopeRep())((DTN->getQualifier() == SS.getScopeRep()) ? static_cast< void> (0) : __assert_fail ("DTN->getQualifier() == SS.getScopeRep()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 9864, __PRETTY_FUNCTION__)); | |||
9865 | QualType T = Context.getDependentTemplateSpecializationType(ETK_Typename, | |||
9866 | DTN->getQualifier(), | |||
9867 | DTN->getIdentifier(), | |||
9868 | TemplateArgs); | |||
9869 | ||||
9870 | // Create source-location information for this type. | |||
9871 | TypeLocBuilder Builder; | |||
9872 | DependentTemplateSpecializationTypeLoc SpecTL | |||
9873 | = Builder.push<DependentTemplateSpecializationTypeLoc>(T); | |||
9874 | SpecTL.setElaboratedKeywordLoc(TypenameLoc); | |||
9875 | SpecTL.setQualifierLoc(SS.getWithLocInContext(Context)); | |||
9876 | SpecTL.setTemplateKeywordLoc(TemplateKWLoc); | |||
9877 | SpecTL.setTemplateNameLoc(TemplateIILoc); | |||
9878 | SpecTL.setLAngleLoc(LAngleLoc); | |||
9879 | SpecTL.setRAngleLoc(RAngleLoc); | |||
9880 | for (unsigned I = 0, N = TemplateArgs.size(); I != N; ++I) | |||
9881 | SpecTL.setArgLocInfo(I, TemplateArgs[I].getLocInfo()); | |||
9882 | return CreateParsedType(T, Builder.getTypeSourceInfo(Context, T)); | |||
9883 | } | |||
9884 | ||||
9885 | QualType T = CheckTemplateIdType(Template, TemplateIILoc, TemplateArgs); | |||
9886 | if (T.isNull()) | |||
9887 | return true; | |||
9888 | ||||
9889 | // Provide source-location information for the template specialization type. | |||
9890 | TypeLocBuilder Builder; | |||
9891 | TemplateSpecializationTypeLoc SpecTL | |||
9892 | = Builder.push<TemplateSpecializationTypeLoc>(T); | |||
9893 | SpecTL.setTemplateKeywordLoc(TemplateKWLoc); | |||
9894 | SpecTL.setTemplateNameLoc(TemplateIILoc); | |||
9895 | SpecTL.setLAngleLoc(LAngleLoc); | |||
9896 | SpecTL.setRAngleLoc(RAngleLoc); | |||
9897 | for (unsigned I = 0, N = TemplateArgs.size(); I != N; ++I) | |||
9898 | SpecTL.setArgLocInfo(I, TemplateArgs[I].getLocInfo()); | |||
9899 | ||||
9900 | T = Context.getElaboratedType(ETK_Typename, SS.getScopeRep(), T); | |||
9901 | ElaboratedTypeLoc TL = Builder.push<ElaboratedTypeLoc>(T); | |||
9902 | TL.setElaboratedKeywordLoc(TypenameLoc); | |||
9903 | TL.setQualifierLoc(SS.getWithLocInContext(Context)); | |||
9904 | ||||
9905 | TypeSourceInfo *TSI = Builder.getTypeSourceInfo(Context, T); | |||
9906 | return CreateParsedType(T, TSI); | |||
9907 | } | |||
9908 | ||||
9909 | ||||
9910 | /// Determine whether this failed name lookup should be treated as being | |||
9911 | /// disabled by a usage of std::enable_if. | |||
9912 | static bool isEnableIf(NestedNameSpecifierLoc NNS, const IdentifierInfo &II, | |||
9913 | SourceRange &CondRange, Expr *&Cond) { | |||
9914 | // We must be looking for a ::type... | |||
9915 | if (!II.isStr("type")) | |||
9916 | return false; | |||
9917 | ||||
9918 | // ... within an explicitly-written template specialization... | |||
9919 | if (!NNS || !NNS.getNestedNameSpecifier()->getAsType()) | |||
9920 | return false; | |||
9921 | TypeLoc EnableIfTy = NNS.getTypeLoc(); | |||
9922 | TemplateSpecializationTypeLoc EnableIfTSTLoc = | |||
9923 | EnableIfTy.getAs<TemplateSpecializationTypeLoc>(); | |||
9924 | if (!EnableIfTSTLoc || EnableIfTSTLoc.getNumArgs() == 0) | |||
9925 | return false; | |||
9926 | const TemplateSpecializationType *EnableIfTST = EnableIfTSTLoc.getTypePtr(); | |||
9927 | ||||
9928 | // ... which names a complete class template declaration... | |||
9929 | const TemplateDecl *EnableIfDecl = | |||
9930 | EnableIfTST->getTemplateName().getAsTemplateDecl(); | |||
9931 | if (!EnableIfDecl || EnableIfTST->isIncompleteType()) | |||
9932 | return false; | |||
9933 | ||||
9934 | // ... called "enable_if". | |||
9935 | const IdentifierInfo *EnableIfII = | |||
9936 | EnableIfDecl->getDeclName().getAsIdentifierInfo(); | |||
9937 | if (!EnableIfII || !EnableIfII->isStr("enable_if")) | |||
9938 | return false; | |||
9939 | ||||
9940 | // Assume the first template argument is the condition. | |||
9941 | CondRange = EnableIfTSTLoc.getArgLoc(0).getSourceRange(); | |||
9942 | ||||
9943 | // Dig out the condition. | |||
9944 | Cond = nullptr; | |||
9945 | if (EnableIfTSTLoc.getArgLoc(0).getArgument().getKind() | |||
9946 | != TemplateArgument::Expression) | |||
9947 | return true; | |||
9948 | ||||
9949 | Cond = EnableIfTSTLoc.getArgLoc(0).getSourceExpression(); | |||
9950 | ||||
9951 | // Ignore Boolean literals; they add no value. | |||
9952 | if (isa<CXXBoolLiteralExpr>(Cond->IgnoreParenCasts())) | |||
9953 | Cond = nullptr; | |||
9954 | ||||
9955 | return true; | |||
9956 | } | |||
9957 | ||||
9958 | /// Build the type that describes a C++ typename specifier, | |||
9959 | /// e.g., "typename T::type". | |||
9960 | QualType | |||
9961 | Sema::CheckTypenameType(ElaboratedTypeKeyword Keyword, | |||
9962 | SourceLocation KeywordLoc, | |||
9963 | NestedNameSpecifierLoc QualifierLoc, | |||
9964 | const IdentifierInfo &II, | |||
9965 | SourceLocation IILoc) { | |||
9966 | CXXScopeSpec SS; | |||
9967 | SS.Adopt(QualifierLoc); | |||
9968 | ||||
9969 | DeclContext *Ctx = computeDeclContext(SS); | |||
9970 | if (!Ctx) { | |||
9971 | // If the nested-name-specifier is dependent and couldn't be | |||
9972 | // resolved to a type, build a typename type. | |||
9973 | assert(QualifierLoc.getNestedNameSpecifier()->isDependent())((QualifierLoc.getNestedNameSpecifier()->isDependent()) ? static_cast <void> (0) : __assert_fail ("QualifierLoc.getNestedNameSpecifier()->isDependent()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaTemplate.cpp" , 9973, __PRETTY_FUNCTION__)); | |||
9974 | return Context.getDependentNameType(Keyword, | |||
9975 | QualifierLoc.getNestedNameSpecifier(), | |||
9976 | &II); | |||
9977 | } | |||
9978 | ||||
9979 | // If the nested-name-specifier refers to the current instantiation, | |||
9980 | // the "typename" keyword itself is superfluous. In C++03, the | |||
9981 | // program is actually ill-formed. However, DR 382 (in C++0x CD1) | |||
9982 | // allows such extraneous "typename" keywords, and we retroactively | |||
9983 | // apply this DR to C++03 code with only a warning. In any case we continue. | |||
9984 | ||||
9985 | if (RequireCompleteDeclContext(SS, Ctx)) | |||
9986 | return QualType(); | |||
9987 | ||||
9988 | DeclarationName Name(&II); | |||
9989 | LookupResult Result(*this, Name, IILoc, LookupOrdinaryName); | |||
9990 | LookupQualifiedName(Result, Ctx, SS); | |||
9991 | unsigned DiagID = 0; | |||
9992 | Decl *Referenced = nullptr; | |||
9993 | switch (Result.getResultKind()) { | |||
9994 | case LookupResult::NotFound: { | |||
9995 | // If we're looking up 'type' within a template named 'enable_if', produce | |||
9996 | // a more specific diagnostic. | |||
9997 | SourceRange CondRange; | |||
9998 | Expr *Cond = nullptr; | |||
9999 | if (isEnableIf(QualifierLoc, II, CondRange, Cond)) { | |||
10000 | // If we have a condition, narrow it down to the specific failed | |||
10001 | // condition. | |||
10002 | if (Cond) { | |||
10003 | Expr *FailedCond; | |||
10004 | std::string FailedDescription; | |||
10005 | std::tie(FailedCond, FailedDescription) = | |||
10006 | findFailedBooleanCondition(Cond); | |||
10007 | ||||
10008 | Diag(FailedCond->getExprLoc(), | |||
10009 | diag::err_typename_nested_not_found_requirement) | |||
10010 | << FailedDescription | |||
10011 | << FailedCond->getSourceRange(); | |||
10012 | return QualType(); | |||
10013 | } | |||
10014 | ||||
10015 | Diag(CondRange.getBegin(), diag::err_typename_nested_not_found_enable_if) | |||
10016 | << Ctx << CondRange; | |||
10017 | return QualType(); | |||
10018 | } | |||
10019 | ||||
10020 | DiagID = diag::err_typename_nested_not_found; | |||
10021 | break; | |||
10022 | } | |||
10023 | ||||
10024 | case LookupResult::FoundUnresolvedValue: { | |||
10025 | // We found a using declaration that is a value. Most likely, the using | |||
10026 | // declaration itself is meant to have the 'typename' keyword. | |||
10027 | SourceRange FullRange(KeywordLoc.isValid() ? KeywordLoc : SS.getBeginLoc(), | |||
10028 | IILoc); | |||
10029 | Diag(IILoc, diag::err_typename_refers_to_using_value_decl) | |||
10030 | << Name << Ctx << FullRange; | |||
10031 | if (UnresolvedUsingValueDecl *Using | |||
10032 | = dyn_cast<UnresolvedUsingValueDecl>(Result.getRepresentativeDecl())){ | |||
10033 | SourceLocation Loc = Using->getQualifierLoc().getBeginLoc(); | |||
10034 | Diag(Loc, diag::note_using_value_decl_missing_typename) | |||
10035 | << FixItHint::CreateInsertion(Loc, "typename "); | |||
10036 | } | |||
10037 | } | |||
10038 | // Fall through to create a dependent typename type, from which we can recover | |||
10039 | // better. | |||
10040 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
10041 | ||||
10042 | case LookupResult::NotFoundInCurrentInstantiation: | |||
10043 | // Okay, it's a member of an unknown instantiation. | |||
10044 | return Context.getDependentNameType(Keyword, | |||
10045 | QualifierLoc.getNestedNameSpecifier(), | |||
10046 | &II); | |||
10047 | ||||
10048 | case LookupResult::Found: | |||
10049 | if (TypeDecl *Type = dyn_cast<TypeDecl>(Result.getFoundDecl())) { | |||
10050 | // C++ [class.qual]p2: | |||
10051 | // In a lookup in which function names are not ignored and the | |||
10052 | // nested-name-specifier nominates a class C, if the name specified | |||
10053 | // after the nested-name-specifier, when looked up in C, is the | |||
10054 | // injected-class-name of C [...] then the name is instead considered | |||
10055 | // to name the constructor of class C. | |||
10056 | // | |||
10057 | // Unlike in an elaborated-type-specifier, function names are not ignored | |||
10058 | // in typename-specifier lookup. However, they are ignored in all the | |||
10059 | // contexts where we form a typename type with no keyword (that is, in | |||
10060 | // mem-initializer-ids, base-specifiers, and elaborated-type-specifiers). | |||
10061 | // | |||
10062 | // FIXME: That's not strictly true: mem-initializer-id lookup does not | |||
10063 | // ignore functions, but that appears to be an oversight. | |||
10064 | auto *LookupRD = dyn_cast_or_null<CXXRecordDecl>(Ctx); | |||
10065 | auto *FoundRD = dyn_cast<CXXRecordDecl>(Type); | |||
10066 | if (Keyword == ETK_Typename && LookupRD && FoundRD && | |||
10067 | FoundRD->isInjectedClassName() && | |||
10068 | declaresSameEntity(LookupRD, cast<Decl>(FoundRD->getParent()))) | |||
10069 | Diag(IILoc, diag::ext_out_of_line_qualified_id_type_names_constructor) | |||
10070 | << &II << 1 << 0 /*'typename' keyword used*/; | |||
10071 | ||||
10072 | // We found a type. Build an ElaboratedType, since the | |||
10073 | // typename-specifier was just sugar. | |||
10074 | MarkAnyDeclReferenced(Type->getLocation(), Type, /*OdrUse=*/false); | |||
10075 | return Context.getElaboratedType(Keyword, | |||
10076 | QualifierLoc.getNestedNameSpecifier(), | |||
10077 | Context.getTypeDeclType(Type)); | |||
10078 | } | |||
10079 | ||||
10080 | // C++ [dcl.type.simple]p2: | |||
10081 | // A type-specifier of the form | |||
10082 | // typename[opt] nested-name-specifier[opt] template-name | |||
10083 | // is a placeholder for a deduced class type [...]. | |||
10084 | if (getLangOpts().CPlusPlus17) { | |||
10085 | if (auto *TD = getAsTypeTemplateDecl(Result.getFoundDecl())) { | |||
10086 | return Context.getElaboratedType( | |||
10087 | Keyword, QualifierLoc.getNestedNameSpecifier(), | |||
10088 | Context.getDeducedTemplateSpecializationType(TemplateName(TD), | |||
10089 | QualType(), false)); | |||
10090 | } | |||
10091 | } | |||
10092 | ||||
10093 | DiagID = diag::err_typename_nested_not_type; | |||
10094 | Referenced = Result.getFoundDecl(); | |||
10095 | break; | |||
10096 | ||||
10097 | case LookupResult::FoundOverloaded: | |||
10098 | DiagID = diag::err_typename_nested_not_type; | |||
10099 | Referenced = *Result.begin(); | |||
10100 | break; | |||
10101 | ||||
10102 | case LookupResult::Ambiguous: | |||
10103 | return QualType(); | |||
10104 | } | |||
10105 | ||||
10106 | // If we get here, it's because name lookup did not find a | |||
10107 | // type. Emit an appropriate diagnostic and return an error. | |||
10108 | SourceRange FullRange(KeywordLoc.isValid() ? KeywordLoc : SS.getBeginLoc(), | |||
10109 | IILoc); | |||
10110 | Diag(IILoc, DiagID) << FullRange << Name << Ctx; | |||
10111 | if (Referenced) | |||
10112 | Diag(Referenced->getLocation(), diag::note_typename_refers_here) | |||
10113 | << Name; | |||
10114 | return QualType(); | |||
10115 | } | |||
10116 | ||||
10117 | namespace { | |||
10118 | // See Sema::RebuildTypeInCurrentInstantiation | |||
10119 | class CurrentInstantiationRebuilder | |||
10120 | : public TreeTransform<CurrentInstantiationRebuilder> { | |||
10121 | SourceLocation Loc; | |||
10122 | DeclarationName Entity; | |||
10123 | ||||
10124 | public: | |||
10125 | typedef TreeTransform<CurrentInstantiationRebuilder> inherited; | |||
10126 | ||||
10127 | CurrentInstantiationRebuilder(Sema &SemaRef, | |||
10128 | SourceLocation Loc, | |||
10129 | DeclarationName Entity) | |||
10130 | : TreeTransform<CurrentInstantiationRebuilder>(SemaRef), | |||
10131 | Loc(Loc), Entity(Entity) { } | |||
10132 | ||||
10133 | /// Determine whether the given type \p T has already been | |||
10134 | /// transformed. | |||
10135 | /// | |||
10136 | /// For the purposes of type reconstruction, a type has already been | |||
10137 | /// transformed if it is NULL or if it is not dependent. | |||
10138 | bool AlreadyTransformed(QualType T) { | |||
10139 | return T.isNull() || !T->isDependentType(); | |||
10140 | } | |||
10141 | ||||
10142 | /// Returns the location of the entity whose type is being | |||
10143 | /// rebuilt. | |||
10144 | SourceLocation getBaseLocation() { return Loc; } | |||
10145 | ||||
10146 | /// Returns the name of the entity whose type is being rebuilt. | |||
10147 | DeclarationName getBaseEntity() { return Entity; } | |||
10148 | ||||
10149 | /// Sets the "base" location and entity when that | |||
10150 | /// information is known based on another transformation. | |||
10151 | void setBase(SourceLocation Loc, DeclarationName Entity) { | |||
10152 | this->Loc = Loc; | |||
10153 | this->Entity = Entity; | |||
10154 | } | |||
10155 | ||||
10156 | ExprResult TransformLambdaExpr(LambdaExpr *E) { | |||
10157 | // Lambdas never need to be transformed. | |||
10158 | return E; | |||
10159 | } | |||
10160 | }; | |||
10161 | } // end anonymous namespace | |||
10162 | ||||
10163 | /// Rebuilds a type within the context of the current instantiation. | |||
10164 | /// | |||
10165 | /// The type \p T is part of the type of an out-of-line member definition of | |||
10166 | /// a class template (or class template partial specialization) that was parsed | |||
10167 | /// and constructed before we entered the scope of the class template (or | |||
10168 | /// partial specialization thereof). This routine will rebuild that type now | |||
10169 | /// that we have entered the declarator's scope, which may produce different | |||
10170 | /// canonical types, e.g., | |||
10171 | /// | |||
10172 | /// \code | |||
10173 | /// template<typename T> | |||
10174 | /// struct X { | |||
10175 | /// typedef T* pointer; | |||
10176 | /// pointer data(); | |||
10177 | /// }; | |||
10178 | /// | |||
10179 | /// template<typename T> | |||
10180 | /// typename X<T>::pointer X<T>::data() { ... } | |||
10181 | /// \endcode | |||
10182 | /// | |||
10183 | /// Here, the type "typename X<T>::pointer" will be created as a DependentNameType, | |||
10184 | /// since we do not know that we can look into X<T> when we parsed the type. | |||
10185 | /// This function will rebuild the type, performing the lookup of "pointer" | |||
10186 | /// in X<T> and returning an ElaboratedType whose canonical type is the same | |||
10187 | /// as the canonical type of T*, allowing the return types of the out-of-line | |||
10188 | /// definition and the declaration to match. | |||
10189 | TypeSourceInfo *Sema::RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, | |||
10190 | SourceLocation Loc, | |||
10191 | DeclarationName Name) { | |||
10192 | if (!T || !T->getType()->isDependentType()) | |||
10193 | return T; | |||
10194 | ||||
10195 | CurrentInstantiationRebuilder Rebuilder(*this, Loc, Name); | |||
10196 | return Rebuilder.TransformType(T); | |||
10197 | } | |||
10198 | ||||
10199 | ExprResult Sema::RebuildExprInCurrentInstantiation(Expr *E) { | |||
10200 | CurrentInstantiationRebuilder Rebuilder(*this, E->getExprLoc(), | |||
10201 | DeclarationName()); | |||
10202 | return Rebuilder.TransformExpr(E); | |||
10203 | } | |||
10204 | ||||
10205 | bool Sema::RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS) { | |||
10206 | if (SS.isInvalid()) | |||
10207 | return true; | |||
10208 | ||||
10209 | NestedNameSpecifierLoc QualifierLoc = SS.getWithLocInContext(Context); | |||
10210 | CurrentInstantiationRebuilder Rebuilder(*this, SS.getRange().getBegin(), | |||
10211 | DeclarationName()); | |||
10212 | NestedNameSpecifierLoc Rebuilt | |||
10213 | = Rebuilder.TransformNestedNameSpecifierLoc(QualifierLoc); | |||
10214 | if (!Rebuilt) | |||
10215 | return true; | |||
10216 | ||||
10217 | SS.Adopt(Rebuilt); | |||
10218 | return false; | |||
10219 | } | |||
10220 | ||||
10221 | /// Rebuild the template parameters now that we know we're in a current | |||
10222 | /// instantiation. | |||
10223 | bool Sema::RebuildTemplateParamsInCurrentInstantiation( | |||
10224 | TemplateParameterList *Params) { | |||
10225 | for (unsigned I = 0, N = Params->size(); I != N; ++I) { | |||
10226 | Decl *Param = Params->getParam(I); | |||
10227 | ||||
10228 | // There is nothing to rebuild in a type parameter. | |||
10229 | if (isa<TemplateTypeParmDecl>(Param)) | |||
10230 | continue; | |||
10231 | ||||
10232 | // Rebuild the template parameter list of a template template parameter. | |||
10233 | if (TemplateTemplateParmDecl *TTP | |||
10234 | = dyn_cast<TemplateTemplateParmDecl>(Param)) { | |||
10235 | if (RebuildTemplateParamsInCurrentInstantiation( | |||
10236 | TTP->getTemplateParameters())) | |||
10237 | return true; | |||
10238 | ||||
10239 | continue; | |||
10240 | } | |||
10241 | ||||
10242 | // Rebuild the type of a non-type template parameter. | |||
10243 | NonTypeTemplateParmDecl *NTTP = cast<NonTypeTemplateParmDecl>(Param); | |||
10244 | TypeSourceInfo *NewTSI | |||
10245 | = RebuildTypeInCurrentInstantiation(NTTP->getTypeSourceInfo(), | |||
10246 | NTTP->getLocation(), | |||
10247 | NTTP->getDeclName()); | |||
10248 | if (!NewTSI) | |||
10249 | return true; | |||
10250 | ||||
10251 | if (NewTSI->getType()->isUndeducedType()) { | |||
10252 | // C++17 [temp.dep.expr]p3: | |||
10253 | // An id-expression is type-dependent if it contains | |||
10254 | // - an identifier associated by name lookup with a non-type | |||
10255 | // template-parameter declared with a type that contains a | |||
10256 | // placeholder type (7.1.7.4), | |||
10257 | NewTSI = SubstAutoTypeSourceInfo(NewTSI, Context.DependentTy); | |||
10258 | } | |||
10259 | ||||
10260 | if (NewTSI != NTTP->getTypeSourceInfo()) { | |||
10261 | NTTP->setTypeSourceInfo(NewTSI); | |||
10262 | NTTP->setType(NewTSI->getType()); | |||
10263 | } | |||
10264 | } | |||
10265 | ||||
10266 | return false; | |||
10267 | } | |||
10268 | ||||
10269 | /// Produces a formatted string that describes the binding of | |||
10270 | /// template parameters to template arguments. | |||
10271 | std::string | |||
10272 | Sema::getTemplateArgumentBindingsText(const TemplateParameterList *Params, | |||
10273 | const TemplateArgumentList &Args) { | |||
10274 | return getTemplateArgumentBindingsText(Params, Args.data(), Args.size()); | |||
10275 | } | |||
10276 | ||||
10277 | std::string | |||
10278 | Sema::getTemplateArgumentBindingsText(const TemplateParameterList *Params, | |||
10279 | const TemplateArgument *Args, | |||
10280 | unsigned NumArgs) { | |||
10281 | SmallString<128> Str; | |||
10282 | llvm::raw_svector_ostream Out(Str); | |||
10283 | ||||
10284 | if (!Params || Params->size() == 0 || NumArgs == 0) | |||
10285 | return std::string(); | |||
10286 | ||||
10287 | for (unsigned I = 0, N = Params->size(); I != N; ++I) { | |||
10288 | if (I >= NumArgs) | |||
10289 | break; | |||
10290 | ||||
10291 | if (I == 0) | |||
10292 | Out << "[with "; | |||
10293 | else | |||
10294 | Out << ", "; | |||
10295 | ||||
10296 | if (const IdentifierInfo *Id = Params->getParam(I)->getIdentifier()) { | |||
10297 | Out << Id->getName(); | |||
10298 | } else { | |||
10299 | Out << '$' << I; | |||
10300 | } | |||
10301 | ||||
10302 | Out << " = "; | |||
10303 | Args[I].print(getPrintingPolicy(), Out); | |||
10304 | } | |||
10305 | ||||
10306 | Out << ']'; | |||
10307 | return Out.str(); | |||
10308 | } | |||
10309 | ||||
10310 | void Sema::MarkAsLateParsedTemplate(FunctionDecl *FD, Decl *FnD, | |||
10311 | CachedTokens &Toks) { | |||
10312 | if (!FD) | |||
10313 | return; | |||
10314 | ||||
10315 | auto LPT = std::make_unique<LateParsedTemplate>(); | |||
10316 | ||||
10317 | // Take tokens to avoid allocations | |||
10318 | LPT->Toks.swap(Toks); | |||
10319 | LPT->D = FnD; | |||
10320 | LateParsedTemplateMap.insert(std::make_pair(FD, std::move(LPT))); | |||
10321 | ||||
10322 | FD->setLateTemplateParsed(true); | |||
10323 | } | |||
10324 | ||||
10325 | void Sema::UnmarkAsLateParsedTemplate(FunctionDecl *FD) { | |||
10326 | if (!FD) | |||
10327 | return; | |||
10328 | FD->setLateTemplateParsed(false); | |||
10329 | } | |||
10330 | ||||
10331 | bool Sema::IsInsideALocalClassWithinATemplateFunction() { | |||
10332 | DeclContext *DC = CurContext; | |||
10333 | ||||
10334 | while (DC) { | |||
10335 | if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(CurContext)) { | |||
10336 | const FunctionDecl *FD = RD->isLocalClass(); | |||
10337 | return (FD && FD->getTemplatedKind() != FunctionDecl::TK_NonTemplate); | |||
10338 | } else if (DC->isTranslationUnit() || DC->isNamespace()) | |||
10339 | return false; | |||
10340 | ||||
10341 | DC = DC->getParent(); | |||
10342 | } | |||
10343 | return false; | |||
10344 | } | |||
10345 | ||||
10346 | namespace { | |||
10347 | /// Walk the path from which a declaration was instantiated, and check | |||
10348 | /// that every explicit specialization along that path is visible. This enforces | |||
10349 | /// C++ [temp.expl.spec]/6: | |||
10350 | /// | |||
10351 | /// If a template, a member template or a member of a class template is | |||
10352 | /// explicitly specialized then that specialization shall be declared before | |||
10353 | /// the first use of that specialization that would cause an implicit | |||
10354 | /// instantiation to take place, in every translation unit in which such a | |||
10355 | /// use occurs; no diagnostic is required. | |||
10356 | /// | |||
10357 | /// and also C++ [temp.class.spec]/1: | |||
10358 | /// | |||
10359 | /// A partial specialization shall be declared before the first use of a | |||
10360 | /// class template specialization that would make use of the partial | |||
10361 | /// specialization as the result of an implicit or explicit instantiation | |||
10362 | /// in every translation unit in which such a use occurs; no diagnostic is | |||
10363 | /// required. | |||
10364 | class ExplicitSpecializationVisibilityChecker { | |||
10365 | Sema &S; | |||
10366 | SourceLocation Loc; | |||
10367 | llvm::SmallVector<Module *, 8> Modules; | |||
10368 | ||||
10369 | public: | |||
10370 | ExplicitSpecializationVisibilityChecker(Sema &S, SourceLocation Loc) | |||
10371 | : S(S), Loc(Loc) {} | |||
10372 | ||||
10373 | void check(NamedDecl *ND) { | |||
10374 | if (auto *FD = dyn_cast<FunctionDecl>(ND)) | |||
10375 | return checkImpl(FD); | |||
10376 | if (auto *RD = dyn_cast<CXXRecordDecl>(ND)) | |||
10377 | return checkImpl(RD); | |||
10378 | if (auto *VD = dyn_cast<VarDecl>(ND)) | |||
10379 | return checkImpl(VD); | |||
10380 | if (auto *ED = dyn_cast<EnumDecl>(ND)) | |||
10381 | return checkImpl(ED); | |||
10382 | } | |||
10383 | ||||
10384 | private: | |||
10385 | void diagnose(NamedDecl *D, bool IsPartialSpec) { | |||
10386 | auto Kind = IsPartialSpec ? Sema::MissingImportKind::PartialSpecialization | |||
10387 | : Sema::MissingImportKind::ExplicitSpecialization; | |||
10388 | const bool Recover = true; | |||
10389 | ||||
10390 | // If we got a custom set of modules (because only a subset of the | |||
10391 | // declarations are interesting), use them, otherwise let | |||
10392 | // diagnoseMissingImport intelligently pick some. | |||
10393 | if (Modules.empty()) | |||
10394 | S.diagnoseMissingImport(Loc, D, Kind, Recover); | |||
10395 | else | |||
10396 | S.diagnoseMissingImport(Loc, D, D->getLocation(), Modules, Kind, Recover); | |||
10397 | } | |||
10398 | ||||
10399 | // Check a specific declaration. There are three problematic cases: | |||
10400 | // | |||
10401 | // 1) The declaration is an explicit specialization of a template | |||
10402 | // specialization. | |||
10403 | // 2) The declaration is an explicit specialization of a member of an | |||
10404 | // templated class. | |||
10405 | // 3) The declaration is an instantiation of a template, and that template | |||
10406 | // is an explicit specialization of a member of a templated class. | |||
10407 | // | |||
10408 | // We don't need to go any deeper than that, as the instantiation of the | |||
10409 | // surrounding class / etc is not triggered by whatever triggered this | |||
10410 | // instantiation, and thus should be checked elsewhere. | |||
10411 | template<typename SpecDecl> | |||
10412 | void checkImpl(SpecDecl *Spec) { | |||
10413 | bool IsHiddenExplicitSpecialization = false; | |||
10414 | if (Spec->getTemplateSpecializationKind() == TSK_ExplicitSpecialization) { | |||
10415 | IsHiddenExplicitSpecialization = | |||
10416 | Spec->getMemberSpecializationInfo() | |||
10417 | ? !S.hasVisibleMemberSpecialization(Spec, &Modules) | |||
10418 | : !S.hasVisibleExplicitSpecialization(Spec, &Modules); | |||
10419 | } else { | |||
10420 | checkInstantiated(Spec); | |||
10421 | } | |||
10422 | ||||
10423 | if (IsHiddenExplicitSpecialization) | |||
10424 | diagnose(Spec->getMostRecentDecl(), false); | |||
10425 | } | |||
10426 | ||||
10427 | void checkInstantiated(FunctionDecl *FD) { | |||
10428 | if (auto *TD = FD->getPrimaryTemplate()) | |||
10429 | checkTemplate(TD); | |||
10430 | } | |||
10431 | ||||
10432 | void checkInstantiated(CXXRecordDecl *RD) { | |||
10433 | auto *SD = dyn_cast<ClassTemplateSpecializationDecl>(RD); | |||
10434 | if (!SD) | |||
10435 | return; | |||
10436 | ||||
10437 | auto From = SD->getSpecializedTemplateOrPartial(); | |||
10438 | if (auto *TD = From.dyn_cast<ClassTemplateDecl *>()) | |||
10439 | checkTemplate(TD); | |||
10440 | else if (auto *TD = | |||
10441 | From.dyn_cast<ClassTemplatePartialSpecializationDecl *>()) { | |||
10442 | if (!S.hasVisibleDeclaration(TD)) | |||
10443 | diagnose(TD, true); | |||
10444 | checkTemplate(TD); | |||
10445 | } | |||
10446 | } | |||
10447 | ||||
10448 | void checkInstantiated(VarDecl *RD) { | |||
10449 | auto *SD = dyn_cast<VarTemplateSpecializationDecl>(RD); | |||
10450 | if (!SD) | |||
10451 | return; | |||
10452 | ||||
10453 | auto From = SD->getSpecializedTemplateOrPartial(); | |||
10454 | if (auto *TD = From.dyn_cast<VarTemplateDecl *>()) | |||
10455 | checkTemplate(TD); | |||
10456 | else if (auto *TD = | |||
10457 | From.dyn_cast<VarTemplatePartialSpecializationDecl *>()) { | |||
10458 | if (!S.hasVisibleDeclaration(TD)) | |||
10459 | diagnose(TD, true); | |||
10460 | checkTemplate(TD); | |||
10461 | } | |||
10462 | } | |||
10463 | ||||
10464 | void checkInstantiated(EnumDecl *FD) {} | |||
10465 | ||||
10466 | template<typename TemplDecl> | |||
10467 | void checkTemplate(TemplDecl *TD) { | |||
10468 | if (TD->isMemberSpecialization()) { | |||
10469 | if (!S.hasVisibleMemberSpecialization(TD, &Modules)) | |||
10470 | diagnose(TD->getMostRecentDecl(), false); | |||
10471 | } | |||
10472 | } | |||
10473 | }; | |||
10474 | } // end anonymous namespace | |||
10475 | ||||
10476 | void Sema::checkSpecializationVisibility(SourceLocation Loc, NamedDecl *Spec) { | |||
10477 | if (!getLangOpts().Modules) | |||
10478 | return; | |||
10479 | ||||
10480 | ExplicitSpecializationVisibilityChecker(*this, Loc).check(Spec); | |||
10481 | } | |||
10482 | ||||
10483 | /// Check whether a template partial specialization that we've discovered | |||
10484 | /// is hidden, and produce suitable diagnostics if so. | |||
10485 | void Sema::checkPartialSpecializationVisibility(SourceLocation Loc, | |||
10486 | NamedDecl *Spec) { | |||
10487 | llvm::SmallVector<Module *, 8> Modules; | |||
10488 | if (!hasVisibleDeclaration(Spec, &Modules)) | |||
10489 | diagnoseMissingImport(Loc, Spec, Spec->getLocation(), Modules, | |||
10490 | MissingImportKind::PartialSpecialization, | |||
10491 | /*Recover*/true); | |||
10492 | } |
1 | //===- Type.h - C Language Family Type Representation -----------*- C++ -*-===// | ||||||
2 | // | ||||||
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | ||||||
4 | // See https://llvm.org/LICENSE.txt for license information. | ||||||
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||||||
6 | // | ||||||
7 | //===----------------------------------------------------------------------===// | ||||||
8 | // | ||||||
9 | /// \file | ||||||
10 | /// C Language Family Type Representation | ||||||
11 | /// | ||||||
12 | /// This file defines the clang::Type interface and subclasses, used to | ||||||
13 | /// represent types for languages in the C family. | ||||||
14 | // | ||||||
15 | //===----------------------------------------------------------------------===// | ||||||
16 | |||||||
17 | #ifndef LLVM_CLANG_AST_TYPE_H | ||||||
18 | #define LLVM_CLANG_AST_TYPE_H | ||||||
19 | |||||||
20 | #include "clang/AST/NestedNameSpecifier.h" | ||||||
21 | #include "clang/AST/TemplateName.h" | ||||||
22 | #include "clang/Basic/AddressSpaces.h" | ||||||
23 | #include "clang/Basic/AttrKinds.h" | ||||||
24 | #include "clang/Basic/Diagnostic.h" | ||||||
25 | #include "clang/Basic/ExceptionSpecificationType.h" | ||||||
26 | #include "clang/Basic/LLVM.h" | ||||||
27 | #include "clang/Basic/Linkage.h" | ||||||
28 | #include "clang/Basic/PartialDiagnostic.h" | ||||||
29 | #include "clang/Basic/SourceLocation.h" | ||||||
30 | #include "clang/Basic/Specifiers.h" | ||||||
31 | #include "clang/Basic/Visibility.h" | ||||||
32 | #include "llvm/ADT/APInt.h" | ||||||
33 | #include "llvm/ADT/APSInt.h" | ||||||
34 | #include "llvm/ADT/ArrayRef.h" | ||||||
35 | #include "llvm/ADT/FoldingSet.h" | ||||||
36 | #include "llvm/ADT/None.h" | ||||||
37 | #include "llvm/ADT/Optional.h" | ||||||
38 | #include "llvm/ADT/PointerIntPair.h" | ||||||
39 | #include "llvm/ADT/PointerUnion.h" | ||||||
40 | #include "llvm/ADT/StringRef.h" | ||||||
41 | #include "llvm/ADT/Twine.h" | ||||||
42 | #include "llvm/ADT/iterator_range.h" | ||||||
43 | #include "llvm/Support/Casting.h" | ||||||
44 | #include "llvm/Support/Compiler.h" | ||||||
45 | #include "llvm/Support/ErrorHandling.h" | ||||||
46 | #include "llvm/Support/PointerLikeTypeTraits.h" | ||||||
47 | #include "llvm/Support/type_traits.h" | ||||||
48 | #include "llvm/Support/TrailingObjects.h" | ||||||
49 | #include <cassert> | ||||||
50 | #include <cstddef> | ||||||
51 | #include <cstdint> | ||||||
52 | #include <cstring> | ||||||
53 | #include <string> | ||||||
54 | #include <type_traits> | ||||||
55 | #include <utility> | ||||||
56 | |||||||
57 | namespace clang { | ||||||
58 | |||||||
59 | class ExtQuals; | ||||||
60 | class QualType; | ||||||
61 | class TagDecl; | ||||||
62 | class Type; | ||||||
63 | |||||||
64 | enum { | ||||||
65 | TypeAlignmentInBits = 4, | ||||||
66 | TypeAlignment = 1 << TypeAlignmentInBits | ||||||
67 | }; | ||||||
68 | |||||||
69 | } // namespace clang | ||||||
70 | |||||||
71 | namespace llvm { | ||||||
72 | |||||||
73 | template <typename T> | ||||||
74 | struct PointerLikeTypeTraits; | ||||||
75 | template<> | ||||||
76 | struct PointerLikeTypeTraits< ::clang::Type*> { | ||||||
77 | static inline void *getAsVoidPointer(::clang::Type *P) { return P; } | ||||||
78 | |||||||
79 | static inline ::clang::Type *getFromVoidPointer(void *P) { | ||||||
80 | return static_cast< ::clang::Type*>(P); | ||||||
81 | } | ||||||
82 | |||||||
83 | enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; | ||||||
84 | }; | ||||||
85 | |||||||
86 | template<> | ||||||
87 | struct PointerLikeTypeTraits< ::clang::ExtQuals*> { | ||||||
88 | static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } | ||||||
89 | |||||||
90 | static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { | ||||||
91 | return static_cast< ::clang::ExtQuals*>(P); | ||||||
92 | } | ||||||
93 | |||||||
94 | enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; | ||||||
95 | }; | ||||||
96 | |||||||
97 | } // namespace llvm | ||||||
98 | |||||||
99 | namespace clang { | ||||||
100 | |||||||
101 | class ASTContext; | ||||||
102 | template <typename> class CanQual; | ||||||
103 | class CXXRecordDecl; | ||||||
104 | class DeclContext; | ||||||
105 | class EnumDecl; | ||||||
106 | class Expr; | ||||||
107 | class ExtQualsTypeCommonBase; | ||||||
108 | class FunctionDecl; | ||||||
109 | class IdentifierInfo; | ||||||
110 | class NamedDecl; | ||||||
111 | class ObjCInterfaceDecl; | ||||||
112 | class ObjCProtocolDecl; | ||||||
113 | class ObjCTypeParamDecl; | ||||||
114 | struct PrintingPolicy; | ||||||
115 | class RecordDecl; | ||||||
116 | class Stmt; | ||||||
117 | class TagDecl; | ||||||
118 | class TemplateArgument; | ||||||
119 | class TemplateArgumentListInfo; | ||||||
120 | class TemplateArgumentLoc; | ||||||
121 | class TemplateTypeParmDecl; | ||||||
122 | class TypedefNameDecl; | ||||||
123 | class UnresolvedUsingTypenameDecl; | ||||||
124 | |||||||
125 | using CanQualType = CanQual<Type>; | ||||||
126 | |||||||
127 | // Provide forward declarations for all of the *Type classes. | ||||||
128 | #define TYPE(Class, Base) class Class##Type; | ||||||
129 | #include "clang/AST/TypeNodes.inc" | ||||||
130 | |||||||
131 | /// The collection of all-type qualifiers we support. | ||||||
132 | /// Clang supports five independent qualifiers: | ||||||
133 | /// * C99: const, volatile, and restrict | ||||||
134 | /// * MS: __unaligned | ||||||
135 | /// * Embedded C (TR18037): address spaces | ||||||
136 | /// * Objective C: the GC attributes (none, weak, or strong) | ||||||
137 | class Qualifiers { | ||||||
138 | public: | ||||||
139 | enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. | ||||||
140 | Const = 0x1, | ||||||
141 | Restrict = 0x2, | ||||||
142 | Volatile = 0x4, | ||||||
143 | CVRMask = Const | Volatile | Restrict | ||||||
144 | }; | ||||||
145 | |||||||
146 | enum GC { | ||||||
147 | GCNone = 0, | ||||||
148 | Weak, | ||||||
149 | Strong | ||||||
150 | }; | ||||||
151 | |||||||
152 | enum ObjCLifetime { | ||||||
153 | /// There is no lifetime qualification on this type. | ||||||
154 | OCL_None, | ||||||
155 | |||||||
156 | /// This object can be modified without requiring retains or | ||||||
157 | /// releases. | ||||||
158 | OCL_ExplicitNone, | ||||||
159 | |||||||
160 | /// Assigning into this object requires the old value to be | ||||||
161 | /// released and the new value to be retained. The timing of the | ||||||
162 | /// release of the old value is inexact: it may be moved to | ||||||
163 | /// immediately after the last known point where the value is | ||||||
164 | /// live. | ||||||
165 | OCL_Strong, | ||||||
166 | |||||||
167 | /// Reading or writing from this object requires a barrier call. | ||||||
168 | OCL_Weak, | ||||||
169 | |||||||
170 | /// Assigning into this object requires a lifetime extension. | ||||||
171 | OCL_Autoreleasing | ||||||
172 | }; | ||||||
173 | |||||||
174 | enum { | ||||||
175 | /// The maximum supported address space number. | ||||||
176 | /// 23 bits should be enough for anyone. | ||||||
177 | MaxAddressSpace = 0x7fffffu, | ||||||
178 | |||||||
179 | /// The width of the "fast" qualifier mask. | ||||||
180 | FastWidth = 3, | ||||||
181 | |||||||
182 | /// The fast qualifier mask. | ||||||
183 | FastMask = (1 << FastWidth) - 1 | ||||||
184 | }; | ||||||
185 | |||||||
186 | /// Returns the common set of qualifiers while removing them from | ||||||
187 | /// the given sets. | ||||||
188 | static Qualifiers removeCommonQualifiers(Qualifiers &L, Qualifiers &R) { | ||||||
189 | // If both are only CVR-qualified, bit operations are sufficient. | ||||||
190 | if (!(L.Mask & ~CVRMask) && !(R.Mask & ~CVRMask)) { | ||||||
191 | Qualifiers Q; | ||||||
192 | Q.Mask = L.Mask & R.Mask; | ||||||
193 | L.Mask &= ~Q.Mask; | ||||||
194 | R.Mask &= ~Q.Mask; | ||||||
195 | return Q; | ||||||
196 | } | ||||||
197 | |||||||
198 | Qualifiers Q; | ||||||
199 | unsigned CommonCRV = L.getCVRQualifiers() & R.getCVRQualifiers(); | ||||||
200 | Q.addCVRQualifiers(CommonCRV); | ||||||
201 | L.removeCVRQualifiers(CommonCRV); | ||||||
202 | R.removeCVRQualifiers(CommonCRV); | ||||||
203 | |||||||
204 | if (L.getObjCGCAttr() == R.getObjCGCAttr()) { | ||||||
205 | Q.setObjCGCAttr(L.getObjCGCAttr()); | ||||||
206 | L.removeObjCGCAttr(); | ||||||
207 | R.removeObjCGCAttr(); | ||||||
208 | } | ||||||
209 | |||||||
210 | if (L.getObjCLifetime() == R.getObjCLifetime()) { | ||||||
211 | Q.setObjCLifetime(L.getObjCLifetime()); | ||||||
212 | L.removeObjCLifetime(); | ||||||
213 | R.removeObjCLifetime(); | ||||||
214 | } | ||||||
215 | |||||||
216 | if (L.getAddressSpace() == R.getAddressSpace()) { | ||||||
217 | Q.setAddressSpace(L.getAddressSpace()); | ||||||
218 | L.removeAddressSpace(); | ||||||
219 | R.removeAddressSpace(); | ||||||
220 | } | ||||||
221 | return Q; | ||||||
222 | } | ||||||
223 | |||||||
224 | static Qualifiers fromFastMask(unsigned Mask) { | ||||||
225 | Qualifiers Qs; | ||||||
226 | Qs.addFastQualifiers(Mask); | ||||||
227 | return Qs; | ||||||
228 | } | ||||||
229 | |||||||
230 | static Qualifiers fromCVRMask(unsigned CVR) { | ||||||
231 | Qualifiers Qs; | ||||||
232 | Qs.addCVRQualifiers(CVR); | ||||||
233 | return Qs; | ||||||
234 | } | ||||||
235 | |||||||
236 | static Qualifiers fromCVRUMask(unsigned CVRU) { | ||||||
237 | Qualifiers Qs; | ||||||
238 | Qs.addCVRUQualifiers(CVRU); | ||||||
239 | return Qs; | ||||||
240 | } | ||||||
241 | |||||||
242 | // Deserialize qualifiers from an opaque representation. | ||||||
243 | static Qualifiers fromOpaqueValue(unsigned opaque) { | ||||||
244 | Qualifiers Qs; | ||||||
245 | Qs.Mask = opaque; | ||||||
246 | return Qs; | ||||||
247 | } | ||||||
248 | |||||||
249 | // Serialize these qualifiers into an opaque representation. | ||||||
250 | unsigned getAsOpaqueValue() const { | ||||||
251 | return Mask; | ||||||
252 | } | ||||||
253 | |||||||
254 | bool hasConst() const { return Mask & Const; } | ||||||
255 | bool hasOnlyConst() const { return Mask == Const; } | ||||||
256 | void removeConst() { Mask &= ~Const; } | ||||||
257 | void addConst() { Mask |= Const; } | ||||||
258 | |||||||
259 | bool hasVolatile() const { return Mask & Volatile; } | ||||||
260 | bool hasOnlyVolatile() const { return Mask == Volatile; } | ||||||
261 | void removeVolatile() { Mask &= ~Volatile; } | ||||||
262 | void addVolatile() { Mask |= Volatile; } | ||||||
263 | |||||||
264 | bool hasRestrict() const { return Mask & Restrict; } | ||||||
265 | bool hasOnlyRestrict() const { return Mask == Restrict; } | ||||||
266 | void removeRestrict() { Mask &= ~Restrict; } | ||||||
267 | void addRestrict() { Mask |= Restrict; } | ||||||
268 | |||||||
269 | bool hasCVRQualifiers() const { return getCVRQualifiers(); } | ||||||
270 | unsigned getCVRQualifiers() const { return Mask & CVRMask; } | ||||||
271 | unsigned getCVRUQualifiers() const { return Mask & (CVRMask | UMask); } | ||||||
272 | |||||||
273 | void setCVRQualifiers(unsigned mask) { | ||||||
274 | assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 274, __PRETTY_FUNCTION__)); | ||||||
275 | Mask = (Mask & ~CVRMask) | mask; | ||||||
276 | } | ||||||
277 | void removeCVRQualifiers(unsigned mask) { | ||||||
278 | assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 278, __PRETTY_FUNCTION__)); | ||||||
279 | Mask &= ~mask; | ||||||
280 | } | ||||||
281 | void removeCVRQualifiers() { | ||||||
282 | removeCVRQualifiers(CVRMask); | ||||||
283 | } | ||||||
284 | void addCVRQualifiers(unsigned mask) { | ||||||
285 | assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 285, __PRETTY_FUNCTION__)); | ||||||
286 | Mask |= mask; | ||||||
287 | } | ||||||
288 | void addCVRUQualifiers(unsigned mask) { | ||||||
289 | assert(!(mask & ~CVRMask & ~UMask) && "bitmask contains non-CVRU bits")((!(mask & ~CVRMask & ~UMask) && "bitmask contains non-CVRU bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask & ~UMask) && \"bitmask contains non-CVRU bits\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 289, __PRETTY_FUNCTION__)); | ||||||
290 | Mask |= mask; | ||||||
291 | } | ||||||
292 | |||||||
293 | bool hasUnaligned() const { return Mask & UMask; } | ||||||
294 | void setUnaligned(bool flag) { | ||||||
295 | Mask = (Mask & ~UMask) | (flag ? UMask : 0); | ||||||
296 | } | ||||||
297 | void removeUnaligned() { Mask &= ~UMask; } | ||||||
298 | void addUnaligned() { Mask |= UMask; } | ||||||
299 | |||||||
300 | bool hasObjCGCAttr() const { return Mask & GCAttrMask; } | ||||||
301 | GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } | ||||||
302 | void setObjCGCAttr(GC type) { | ||||||
303 | Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); | ||||||
304 | } | ||||||
305 | void removeObjCGCAttr() { setObjCGCAttr(GCNone); } | ||||||
306 | void addObjCGCAttr(GC type) { | ||||||
307 | assert(type)((type) ? static_cast<void> (0) : __assert_fail ("type" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 307, __PRETTY_FUNCTION__)); | ||||||
308 | setObjCGCAttr(type); | ||||||
309 | } | ||||||
310 | Qualifiers withoutObjCGCAttr() const { | ||||||
311 | Qualifiers qs = *this; | ||||||
312 | qs.removeObjCGCAttr(); | ||||||
313 | return qs; | ||||||
314 | } | ||||||
315 | Qualifiers withoutObjCLifetime() const { | ||||||
316 | Qualifiers qs = *this; | ||||||
317 | qs.removeObjCLifetime(); | ||||||
318 | return qs; | ||||||
319 | } | ||||||
320 | Qualifiers withoutAddressSpace() const { | ||||||
321 | Qualifiers qs = *this; | ||||||
322 | qs.removeAddressSpace(); | ||||||
323 | return qs; | ||||||
324 | } | ||||||
325 | |||||||
326 | bool hasObjCLifetime() const { return Mask & LifetimeMask; } | ||||||
327 | ObjCLifetime getObjCLifetime() const { | ||||||
328 | return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift); | ||||||
329 | } | ||||||
330 | void setObjCLifetime(ObjCLifetime type) { | ||||||
331 | Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift); | ||||||
332 | } | ||||||
333 | void removeObjCLifetime() { setObjCLifetime(OCL_None); } | ||||||
334 | void addObjCLifetime(ObjCLifetime type) { | ||||||
335 | assert(type)((type) ? static_cast<void> (0) : __assert_fail ("type" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 335, __PRETTY_FUNCTION__)); | ||||||
336 | assert(!hasObjCLifetime())((!hasObjCLifetime()) ? static_cast<void> (0) : __assert_fail ("!hasObjCLifetime()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 336, __PRETTY_FUNCTION__)); | ||||||
337 | Mask |= (type << LifetimeShift); | ||||||
338 | } | ||||||
339 | |||||||
340 | /// True if the lifetime is neither None or ExplicitNone. | ||||||
341 | bool hasNonTrivialObjCLifetime() const { | ||||||
342 | ObjCLifetime lifetime = getObjCLifetime(); | ||||||
343 | return (lifetime > OCL_ExplicitNone); | ||||||
344 | } | ||||||
345 | |||||||
346 | /// True if the lifetime is either strong or weak. | ||||||
347 | bool hasStrongOrWeakObjCLifetime() const { | ||||||
348 | ObjCLifetime lifetime = getObjCLifetime(); | ||||||
349 | return (lifetime == OCL_Strong || lifetime == OCL_Weak); | ||||||
350 | } | ||||||
351 | |||||||
352 | bool hasAddressSpace() const { return Mask & AddressSpaceMask; } | ||||||
353 | LangAS getAddressSpace() const { | ||||||
354 | return static_cast<LangAS>(Mask >> AddressSpaceShift); | ||||||
355 | } | ||||||
356 | bool hasTargetSpecificAddressSpace() const { | ||||||
357 | return isTargetAddressSpace(getAddressSpace()); | ||||||
358 | } | ||||||
359 | /// Get the address space attribute value to be printed by diagnostics. | ||||||
360 | unsigned getAddressSpaceAttributePrintValue() const { | ||||||
361 | auto Addr = getAddressSpace(); | ||||||
362 | // This function is not supposed to be used with language specific | ||||||
363 | // address spaces. If that happens, the diagnostic message should consider | ||||||
364 | // printing the QualType instead of the address space value. | ||||||
365 | assert(Addr == LangAS::Default || hasTargetSpecificAddressSpace())((Addr == LangAS::Default || hasTargetSpecificAddressSpace()) ? static_cast<void> (0) : __assert_fail ("Addr == LangAS::Default || hasTargetSpecificAddressSpace()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 365, __PRETTY_FUNCTION__)); | ||||||
366 | if (Addr != LangAS::Default) | ||||||
367 | return toTargetAddressSpace(Addr); | ||||||
368 | // TODO: The diagnostic messages where Addr may be 0 should be fixed | ||||||
369 | // since it cannot differentiate the situation where 0 denotes the default | ||||||
370 | // address space or user specified __attribute__((address_space(0))). | ||||||
371 | return 0; | ||||||
372 | } | ||||||
373 | void setAddressSpace(LangAS space) { | ||||||
374 | assert((unsigned)space <= MaxAddressSpace)(((unsigned)space <= MaxAddressSpace) ? static_cast<void > (0) : __assert_fail ("(unsigned)space <= MaxAddressSpace" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 374, __PRETTY_FUNCTION__)); | ||||||
375 | Mask = (Mask & ~AddressSpaceMask) | ||||||
376 | | (((uint32_t) space) << AddressSpaceShift); | ||||||
377 | } | ||||||
378 | void removeAddressSpace() { setAddressSpace(LangAS::Default); } | ||||||
379 | void addAddressSpace(LangAS space) { | ||||||
380 | assert(space != LangAS::Default)((space != LangAS::Default) ? static_cast<void> (0) : __assert_fail ("space != LangAS::Default", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 380, __PRETTY_FUNCTION__)); | ||||||
381 | setAddressSpace(space); | ||||||
382 | } | ||||||
383 | |||||||
384 | // Fast qualifiers are those that can be allocated directly | ||||||
385 | // on a QualType object. | ||||||
386 | bool hasFastQualifiers() const { return getFastQualifiers(); } | ||||||
387 | unsigned getFastQualifiers() const { return Mask & FastMask; } | ||||||
388 | void setFastQualifiers(unsigned mask) { | ||||||
389 | assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 389, __PRETTY_FUNCTION__)); | ||||||
390 | Mask = (Mask & ~FastMask) | mask; | ||||||
391 | } | ||||||
392 | void removeFastQualifiers(unsigned mask) { | ||||||
393 | assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 393, __PRETTY_FUNCTION__)); | ||||||
394 | Mask &= ~mask; | ||||||
395 | } | ||||||
396 | void removeFastQualifiers() { | ||||||
397 | removeFastQualifiers(FastMask); | ||||||
398 | } | ||||||
399 | void addFastQualifiers(unsigned mask) { | ||||||
400 | assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 400, __PRETTY_FUNCTION__)); | ||||||
401 | Mask |= mask; | ||||||
402 | } | ||||||
403 | |||||||
404 | /// Return true if the set contains any qualifiers which require an ExtQuals | ||||||
405 | /// node to be allocated. | ||||||
406 | bool hasNonFastQualifiers() const { return Mask & ~FastMask; } | ||||||
407 | Qualifiers getNonFastQualifiers() const { | ||||||
408 | Qualifiers Quals = *this; | ||||||
409 | Quals.setFastQualifiers(0); | ||||||
410 | return Quals; | ||||||
411 | } | ||||||
412 | |||||||
413 | /// Return true if the set contains any qualifiers. | ||||||
414 | bool hasQualifiers() const { return Mask; } | ||||||
415 | bool empty() const { return !Mask; } | ||||||
416 | |||||||
417 | /// Add the qualifiers from the given set to this set. | ||||||
418 | void addQualifiers(Qualifiers Q) { | ||||||
419 | // If the other set doesn't have any non-boolean qualifiers, just | ||||||
420 | // bit-or it in. | ||||||
421 | if (!(Q.Mask & ~CVRMask)) | ||||||
422 | Mask |= Q.Mask; | ||||||
423 | else { | ||||||
424 | Mask |= (Q.Mask & CVRMask); | ||||||
425 | if (Q.hasAddressSpace()) | ||||||
426 | addAddressSpace(Q.getAddressSpace()); | ||||||
427 | if (Q.hasObjCGCAttr()) | ||||||
428 | addObjCGCAttr(Q.getObjCGCAttr()); | ||||||
429 | if (Q.hasObjCLifetime()) | ||||||
430 | addObjCLifetime(Q.getObjCLifetime()); | ||||||
431 | } | ||||||
432 | } | ||||||
433 | |||||||
434 | /// Remove the qualifiers from the given set from this set. | ||||||
435 | void removeQualifiers(Qualifiers Q) { | ||||||
436 | // If the other set doesn't have any non-boolean qualifiers, just | ||||||
437 | // bit-and the inverse in. | ||||||
438 | if (!(Q.Mask & ~CVRMask)) | ||||||
439 | Mask &= ~Q.Mask; | ||||||
440 | else { | ||||||
441 | Mask &= ~(Q.Mask & CVRMask); | ||||||
442 | if (getObjCGCAttr() == Q.getObjCGCAttr()) | ||||||
443 | removeObjCGCAttr(); | ||||||
444 | if (getObjCLifetime() == Q.getObjCLifetime()) | ||||||
445 | removeObjCLifetime(); | ||||||
446 | if (getAddressSpace() == Q.getAddressSpace()) | ||||||
447 | removeAddressSpace(); | ||||||
448 | } | ||||||
449 | } | ||||||
450 | |||||||
451 | /// Add the qualifiers from the given set to this set, given that | ||||||
452 | /// they don't conflict. | ||||||
453 | void addConsistentQualifiers(Qualifiers qs) { | ||||||
454 | assert(getAddressSpace() == qs.getAddressSpace() ||((getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace () || !qs.hasAddressSpace()) ? static_cast<void> (0) : __assert_fail ("getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace() || !qs.hasAddressSpace()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 455, __PRETTY_FUNCTION__)) | ||||||
455 | !hasAddressSpace() || !qs.hasAddressSpace())((getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace () || !qs.hasAddressSpace()) ? static_cast<void> (0) : __assert_fail ("getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace() || !qs.hasAddressSpace()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 455, __PRETTY_FUNCTION__)); | ||||||
456 | assert(getObjCGCAttr() == qs.getObjCGCAttr() ||((getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()) ? static_cast<void> (0) : __assert_fail ("getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 457, __PRETTY_FUNCTION__)) | ||||||
457 | !hasObjCGCAttr() || !qs.hasObjCGCAttr())((getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()) ? static_cast<void> (0) : __assert_fail ("getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 457, __PRETTY_FUNCTION__)); | ||||||
458 | assert(getObjCLifetime() == qs.getObjCLifetime() ||((getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime () || !qs.hasObjCLifetime()) ? static_cast<void> (0) : __assert_fail ("getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime() || !qs.hasObjCLifetime()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 459, __PRETTY_FUNCTION__)) | ||||||
459 | !hasObjCLifetime() || !qs.hasObjCLifetime())((getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime () || !qs.hasObjCLifetime()) ? static_cast<void> (0) : __assert_fail ("getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime() || !qs.hasObjCLifetime()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 459, __PRETTY_FUNCTION__)); | ||||||
460 | Mask |= qs.Mask; | ||||||
461 | } | ||||||
462 | |||||||
463 | /// Returns true if address space A is equal to or a superset of B. | ||||||
464 | /// OpenCL v2.0 defines conversion rules (OpenCLC v2.0 s6.5.5) and notion of | ||||||
465 | /// overlapping address spaces. | ||||||
466 | /// CL1.1 or CL1.2: | ||||||
467 | /// every address space is a superset of itself. | ||||||
468 | /// CL2.0 adds: | ||||||
469 | /// __generic is a superset of any address space except for __constant. | ||||||
470 | static bool isAddressSpaceSupersetOf(LangAS A, LangAS B) { | ||||||
471 | // Address spaces must match exactly. | ||||||
472 | return A == B || | ||||||
473 | // Otherwise in OpenCLC v2.0 s6.5.5: every address space except | ||||||
474 | // for __constant can be used as __generic. | ||||||
475 | (A == LangAS::opencl_generic && B != LangAS::opencl_constant); | ||||||
476 | } | ||||||
477 | |||||||
478 | /// Returns true if the address space in these qualifiers is equal to or | ||||||
479 | /// a superset of the address space in the argument qualifiers. | ||||||
480 | bool isAddressSpaceSupersetOf(Qualifiers other) const { | ||||||
481 | return isAddressSpaceSupersetOf(getAddressSpace(), other.getAddressSpace()); | ||||||
482 | } | ||||||
483 | |||||||
484 | /// Determines if these qualifiers compatibly include another set. | ||||||
485 | /// Generally this answers the question of whether an object with the other | ||||||
486 | /// qualifiers can be safely used as an object with these qualifiers. | ||||||
487 | bool compatiblyIncludes(Qualifiers other) const { | ||||||
488 | return isAddressSpaceSupersetOf(other) && | ||||||
489 | // ObjC GC qualifiers can match, be added, or be removed, but can't | ||||||
490 | // be changed. | ||||||
491 | (getObjCGCAttr() == other.getObjCGCAttr() || !hasObjCGCAttr() || | ||||||
492 | !other.hasObjCGCAttr()) && | ||||||
493 | // ObjC lifetime qualifiers must match exactly. | ||||||
494 | getObjCLifetime() == other.getObjCLifetime() && | ||||||
495 | // CVR qualifiers may subset. | ||||||
496 | (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)) && | ||||||
497 | // U qualifier may superset. | ||||||
498 | (!other.hasUnaligned() || hasUnaligned()); | ||||||
499 | } | ||||||
500 | |||||||
501 | /// Determines if these qualifiers compatibly include another set of | ||||||
502 | /// qualifiers from the narrow perspective of Objective-C ARC lifetime. | ||||||
503 | /// | ||||||
504 | /// One set of Objective-C lifetime qualifiers compatibly includes the other | ||||||
505 | /// if the lifetime qualifiers match, or if both are non-__weak and the | ||||||
506 | /// including set also contains the 'const' qualifier, or both are non-__weak | ||||||
507 | /// and one is None (which can only happen in non-ARC modes). | ||||||
508 | bool compatiblyIncludesObjCLifetime(Qualifiers other) const { | ||||||
509 | if (getObjCLifetime() == other.getObjCLifetime()) | ||||||
510 | return true; | ||||||
511 | |||||||
512 | if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak) | ||||||
513 | return false; | ||||||
514 | |||||||
515 | if (getObjCLifetime() == OCL_None || other.getObjCLifetime() == OCL_None) | ||||||
516 | return true; | ||||||
517 | |||||||
518 | return hasConst(); | ||||||
519 | } | ||||||
520 | |||||||
521 | /// Determine whether this set of qualifiers is a strict superset of | ||||||
522 | /// another set of qualifiers, not considering qualifier compatibility. | ||||||
523 | bool isStrictSupersetOf(Qualifiers Other) const; | ||||||
524 | |||||||
525 | bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } | ||||||
526 | bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } | ||||||
527 | |||||||
528 | explicit operator bool() const { return hasQualifiers(); } | ||||||
529 | |||||||
530 | Qualifiers &operator+=(Qualifiers R) { | ||||||
531 | addQualifiers(R); | ||||||
532 | return *this; | ||||||
533 | } | ||||||
534 | |||||||
535 | // Union two qualifier sets. If an enumerated qualifier appears | ||||||
536 | // in both sets, use the one from the right. | ||||||
537 | friend Qualifiers operator+(Qualifiers L, Qualifiers R) { | ||||||
538 | L += R; | ||||||
539 | return L; | ||||||
540 | } | ||||||
541 | |||||||
542 | Qualifiers &operator-=(Qualifiers R) { | ||||||
543 | removeQualifiers(R); | ||||||
544 | return *this; | ||||||
545 | } | ||||||
546 | |||||||
547 | /// Compute the difference between two qualifier sets. | ||||||
548 | friend Qualifiers operator-(Qualifiers L, Qualifiers R) { | ||||||
549 | L -= R; | ||||||
550 | return L; | ||||||
551 | } | ||||||
552 | |||||||
553 | std::string getAsString() const; | ||||||
554 | std::string getAsString(const PrintingPolicy &Policy) const; | ||||||
555 | |||||||
556 | bool isEmptyWhenPrinted(const PrintingPolicy &Policy) const; | ||||||
557 | void print(raw_ostream &OS, const PrintingPolicy &Policy, | ||||||
558 | bool appendSpaceIfNonEmpty = false) const; | ||||||
559 | |||||||
560 | void Profile(llvm::FoldingSetNodeID &ID) const { | ||||||
561 | ID.AddInteger(Mask); | ||||||
562 | } | ||||||
563 | |||||||
564 | private: | ||||||
565 | // bits: |0 1 2|3|4 .. 5|6 .. 8|9 ... 31| | ||||||
566 | // |C R V|U|GCAttr|Lifetime|AddressSpace| | ||||||
567 | uint32_t Mask = 0; | ||||||
568 | |||||||
569 | static const uint32_t UMask = 0x8; | ||||||
570 | static const uint32_t UShift = 3; | ||||||
571 | static const uint32_t GCAttrMask = 0x30; | ||||||
572 | static const uint32_t GCAttrShift = 4; | ||||||
573 | static const uint32_t LifetimeMask = 0x1C0; | ||||||
574 | static const uint32_t LifetimeShift = 6; | ||||||
575 | static const uint32_t AddressSpaceMask = | ||||||
576 | ~(CVRMask | UMask | GCAttrMask | LifetimeMask); | ||||||
577 | static const uint32_t AddressSpaceShift = 9; | ||||||
578 | }; | ||||||
579 | |||||||
580 | /// A std::pair-like structure for storing a qualified type split | ||||||
581 | /// into its local qualifiers and its locally-unqualified type. | ||||||
582 | struct SplitQualType { | ||||||
583 | /// The locally-unqualified type. | ||||||
584 | const Type *Ty = nullptr; | ||||||
585 | |||||||
586 | /// The local qualifiers. | ||||||
587 | Qualifiers Quals; | ||||||
588 | |||||||
589 | SplitQualType() = default; | ||||||
590 | SplitQualType(const Type *ty, Qualifiers qs) : Ty(ty), Quals(qs) {} | ||||||
591 | |||||||
592 | SplitQualType getSingleStepDesugaredType() const; // end of this file | ||||||
593 | |||||||
594 | // Make std::tie work. | ||||||
595 | std::pair<const Type *,Qualifiers> asPair() const { | ||||||
596 | return std::pair<const Type *, Qualifiers>(Ty, Quals); | ||||||
597 | } | ||||||
598 | |||||||
599 | friend bool operator==(SplitQualType a, SplitQualType b) { | ||||||
600 | return a.Ty == b.Ty && a.Quals == b.Quals; | ||||||
601 | } | ||||||
602 | friend bool operator!=(SplitQualType a, SplitQualType b) { | ||||||
603 | return a.Ty != b.Ty || a.Quals != b.Quals; | ||||||
604 | } | ||||||
605 | }; | ||||||
606 | |||||||
607 | /// The kind of type we are substituting Objective-C type arguments into. | ||||||
608 | /// | ||||||
609 | /// The kind of substitution affects the replacement of type parameters when | ||||||
610 | /// no concrete type information is provided, e.g., when dealing with an | ||||||
611 | /// unspecialized type. | ||||||
612 | enum class ObjCSubstitutionContext { | ||||||
613 | /// An ordinary type. | ||||||
614 | Ordinary, | ||||||
615 | |||||||
616 | /// The result type of a method or function. | ||||||
617 | Result, | ||||||
618 | |||||||
619 | /// The parameter type of a method or function. | ||||||
620 | Parameter, | ||||||
621 | |||||||
622 | /// The type of a property. | ||||||
623 | Property, | ||||||
624 | |||||||
625 | /// The superclass of a type. | ||||||
626 | Superclass, | ||||||
627 | }; | ||||||
628 | |||||||
629 | /// A (possibly-)qualified type. | ||||||
630 | /// | ||||||
631 | /// For efficiency, we don't store CV-qualified types as nodes on their | ||||||
632 | /// own: instead each reference to a type stores the qualifiers. This | ||||||
633 | /// greatly reduces the number of nodes we need to allocate for types (for | ||||||
634 | /// example we only need one for 'int', 'const int', 'volatile int', | ||||||
635 | /// 'const volatile int', etc). | ||||||
636 | /// | ||||||
637 | /// As an added efficiency bonus, instead of making this a pair, we | ||||||
638 | /// just store the two bits we care about in the low bits of the | ||||||
639 | /// pointer. To handle the packing/unpacking, we make QualType be a | ||||||
640 | /// simple wrapper class that acts like a smart pointer. A third bit | ||||||
641 | /// indicates whether there are extended qualifiers present, in which | ||||||
642 | /// case the pointer points to a special structure. | ||||||
643 | class QualType { | ||||||
644 | friend class QualifierCollector; | ||||||
645 | |||||||
646 | // Thankfully, these are efficiently composable. | ||||||
647 | llvm::PointerIntPair<llvm::PointerUnion<const Type *, const ExtQuals *>, | ||||||
648 | Qualifiers::FastWidth> Value; | ||||||
649 | |||||||
650 | const ExtQuals *getExtQualsUnsafe() const { | ||||||
651 | return Value.getPointer().get<const ExtQuals*>(); | ||||||
652 | } | ||||||
653 | |||||||
654 | const Type *getTypePtrUnsafe() const { | ||||||
655 | return Value.getPointer().get<const Type*>(); | ||||||
656 | } | ||||||
657 | |||||||
658 | const ExtQualsTypeCommonBase *getCommonPtr() const { | ||||||
659 | assert(!isNull() && "Cannot retrieve a NULL type pointer")((!isNull() && "Cannot retrieve a NULL type pointer") ? static_cast<void> (0) : __assert_fail ("!isNull() && \"Cannot retrieve a NULL type pointer\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 659, __PRETTY_FUNCTION__)); | ||||||
660 | auto CommonPtrVal = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); | ||||||
661 | CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); | ||||||
662 | return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); | ||||||
663 | } | ||||||
664 | |||||||
665 | public: | ||||||
666 | QualType() = default; | ||||||
667 | QualType(const Type *Ptr, unsigned Quals) : Value(Ptr, Quals) {} | ||||||
668 | QualType(const ExtQuals *Ptr, unsigned Quals) : Value(Ptr, Quals) {} | ||||||
669 | |||||||
670 | unsigned getLocalFastQualifiers() const { return Value.getInt(); } | ||||||
671 | void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } | ||||||
672 | |||||||
673 | /// Retrieves a pointer to the underlying (unqualified) type. | ||||||
674 | /// | ||||||
675 | /// This function requires that the type not be NULL. If the type might be | ||||||
676 | /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). | ||||||
677 | const Type *getTypePtr() const; | ||||||
678 | |||||||
679 | const Type *getTypePtrOrNull() const; | ||||||
680 | |||||||
681 | /// Retrieves a pointer to the name of the base type. | ||||||
682 | const IdentifierInfo *getBaseTypeIdentifier() const; | ||||||
683 | |||||||
684 | /// Divides a QualType into its unqualified type and a set of local | ||||||
685 | /// qualifiers. | ||||||
686 | SplitQualType split() const; | ||||||
687 | |||||||
688 | void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } | ||||||
689 | |||||||
690 | static QualType getFromOpaquePtr(const void *Ptr) { | ||||||
691 | QualType T; | ||||||
692 | T.Value.setFromOpaqueValue(const_cast<void*>(Ptr)); | ||||||
693 | return T; | ||||||
694 | } | ||||||
695 | |||||||
696 | const Type &operator*() const { | ||||||
697 | return *getTypePtr(); | ||||||
698 | } | ||||||
699 | |||||||
700 | const Type *operator->() const { | ||||||
701 | return getTypePtr(); | ||||||
702 | } | ||||||
703 | |||||||
704 | bool isCanonical() const; | ||||||
705 | bool isCanonicalAsParam() const; | ||||||
706 | |||||||
707 | /// Return true if this QualType doesn't point to a type yet. | ||||||
708 | bool isNull() const { | ||||||
709 | return Value.getPointer().isNull(); | ||||||
710 | } | ||||||
711 | |||||||
712 | /// Determine whether this particular QualType instance has the | ||||||
713 | /// "const" qualifier set, without looking through typedefs that may have | ||||||
714 | /// added "const" at a different level. | ||||||
715 | bool isLocalConstQualified() const { | ||||||
716 | return (getLocalFastQualifiers() & Qualifiers::Const); | ||||||
717 | } | ||||||
718 | |||||||
719 | /// Determine whether this type is const-qualified. | ||||||
720 | bool isConstQualified() const; | ||||||
721 | |||||||
722 | /// Determine whether this particular QualType instance has the | ||||||
723 | /// "restrict" qualifier set, without looking through typedefs that may have | ||||||
724 | /// added "restrict" at a different level. | ||||||
725 | bool isLocalRestrictQualified() const { | ||||||
726 | return (getLocalFastQualifiers() & Qualifiers::Restrict); | ||||||
727 | } | ||||||
728 | |||||||
729 | /// Determine whether this type is restrict-qualified. | ||||||
730 | bool isRestrictQualified() const; | ||||||
731 | |||||||
732 | /// Determine whether this particular QualType instance has the | ||||||
733 | /// "volatile" qualifier set, without looking through typedefs that may have | ||||||
734 | /// added "volatile" at a different level. | ||||||
735 | bool isLocalVolatileQualified() const { | ||||||
736 | return (getLocalFastQualifiers() & Qualifiers::Volatile); | ||||||
737 | } | ||||||
738 | |||||||
739 | /// Determine whether this type is volatile-qualified. | ||||||
740 | bool isVolatileQualified() const; | ||||||
741 | |||||||
742 | /// Determine whether this particular QualType instance has any | ||||||
743 | /// qualifiers, without looking through any typedefs that might add | ||||||
744 | /// qualifiers at a different level. | ||||||
745 | bool hasLocalQualifiers() const { | ||||||
746 | return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); | ||||||
747 | } | ||||||
748 | |||||||
749 | /// Determine whether this type has any qualifiers. | ||||||
750 | bool hasQualifiers() const; | ||||||
751 | |||||||
752 | /// Determine whether this particular QualType instance has any | ||||||
753 | /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType | ||||||
754 | /// instance. | ||||||
755 | bool hasLocalNonFastQualifiers() const { | ||||||
756 | return Value.getPointer().is<const ExtQuals*>(); | ||||||
757 | } | ||||||
758 | |||||||
759 | /// Retrieve the set of qualifiers local to this particular QualType | ||||||
760 | /// instance, not including any qualifiers acquired through typedefs or | ||||||
761 | /// other sugar. | ||||||
762 | Qualifiers getLocalQualifiers() const; | ||||||
763 | |||||||
764 | /// Retrieve the set of qualifiers applied to this type. | ||||||
765 | Qualifiers getQualifiers() const; | ||||||
766 | |||||||
767 | /// Retrieve the set of CVR (const-volatile-restrict) qualifiers | ||||||
768 | /// local to this particular QualType instance, not including any qualifiers | ||||||
769 | /// acquired through typedefs or other sugar. | ||||||
770 | unsigned getLocalCVRQualifiers() const { | ||||||
771 | return getLocalFastQualifiers(); | ||||||
772 | } | ||||||
773 | |||||||
774 | /// Retrieve the set of CVR (const-volatile-restrict) qualifiers | ||||||
775 | /// applied to this type. | ||||||
776 | unsigned getCVRQualifiers() const; | ||||||
777 | |||||||
778 | bool isConstant(const ASTContext& Ctx) const { | ||||||
779 | return QualType::isConstant(*this, Ctx); | ||||||
780 | } | ||||||
781 | |||||||
782 | /// Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10). | ||||||
783 | bool isPODType(const ASTContext &Context) const; | ||||||
784 | |||||||
785 | /// Return true if this is a POD type according to the rules of the C++98 | ||||||
786 | /// standard, regardless of the current compilation's language. | ||||||
787 | bool isCXX98PODType(const ASTContext &Context) const; | ||||||
788 | |||||||
789 | /// Return true if this is a POD type according to the more relaxed rules | ||||||
790 | /// of the C++11 standard, regardless of the current compilation's language. | ||||||
791 | /// (C++0x [basic.types]p9). Note that, unlike | ||||||
792 | /// CXXRecordDecl::isCXX11StandardLayout, this takes DRs into account. | ||||||
793 | bool isCXX11PODType(const ASTContext &Context) const; | ||||||
794 | |||||||
795 | /// Return true if this is a trivial type per (C++0x [basic.types]p9) | ||||||
796 | bool isTrivialType(const ASTContext &Context) const; | ||||||
797 | |||||||
798 | /// Return true if this is a trivially copyable type (C++0x [basic.types]p9) | ||||||
799 | bool isTriviallyCopyableType(const ASTContext &Context) const; | ||||||
800 | |||||||
801 | |||||||
802 | /// Returns true if it is a class and it might be dynamic. | ||||||
803 | bool mayBeDynamicClass() const; | ||||||
804 | |||||||
805 | /// Returns true if it is not a class or if the class might not be dynamic. | ||||||
806 | bool mayBeNotDynamicClass() const; | ||||||
807 | |||||||
808 | // Don't promise in the API that anything besides 'const' can be | ||||||
809 | // easily added. | ||||||
810 | |||||||
811 | /// Add the `const` type qualifier to this QualType. | ||||||
812 | void addConst() { | ||||||
813 | addFastQualifiers(Qualifiers::Const); | ||||||
814 | } | ||||||
815 | QualType withConst() const { | ||||||
816 | return withFastQualifiers(Qualifiers::Const); | ||||||
817 | } | ||||||
818 | |||||||
819 | /// Add the `volatile` type qualifier to this QualType. | ||||||
820 | void addVolatile() { | ||||||
821 | addFastQualifiers(Qualifiers::Volatile); | ||||||
822 | } | ||||||
823 | QualType withVolatile() const { | ||||||
824 | return withFastQualifiers(Qualifiers::Volatile); | ||||||
825 | } | ||||||
826 | |||||||
827 | /// Add the `restrict` qualifier to this QualType. | ||||||
828 | void addRestrict() { | ||||||
829 | addFastQualifiers(Qualifiers::Restrict); | ||||||
830 | } | ||||||
831 | QualType withRestrict() const { | ||||||
832 | return withFastQualifiers(Qualifiers::Restrict); | ||||||
833 | } | ||||||
834 | |||||||
835 | QualType withCVRQualifiers(unsigned CVR) const { | ||||||
836 | return withFastQualifiers(CVR); | ||||||
837 | } | ||||||
838 | |||||||
839 | void addFastQualifiers(unsigned TQs) { | ||||||
840 | assert(!(TQs & ~Qualifiers::FastMask)((!(TQs & ~Qualifiers::FastMask) && "non-fast qualifier bits set in mask!" ) ? static_cast<void> (0) : __assert_fail ("!(TQs & ~Qualifiers::FastMask) && \"non-fast qualifier bits set in mask!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 841, __PRETTY_FUNCTION__)) | ||||||
841 | && "non-fast qualifier bits set in mask!")((!(TQs & ~Qualifiers::FastMask) && "non-fast qualifier bits set in mask!" ) ? static_cast<void> (0) : __assert_fail ("!(TQs & ~Qualifiers::FastMask) && \"non-fast qualifier bits set in mask!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 841, __PRETTY_FUNCTION__)); | ||||||
842 | Value.setInt(Value.getInt() | TQs); | ||||||
843 | } | ||||||
844 | |||||||
845 | void removeLocalConst(); | ||||||
846 | void removeLocalVolatile(); | ||||||
847 | void removeLocalRestrict(); | ||||||
848 | void removeLocalCVRQualifiers(unsigned Mask); | ||||||
849 | |||||||
850 | void removeLocalFastQualifiers() { Value.setInt(0); } | ||||||
851 | void removeLocalFastQualifiers(unsigned Mask) { | ||||||
852 | assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers")((!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers" ) ? static_cast<void> (0) : __assert_fail ("!(Mask & ~Qualifiers::FastMask) && \"mask has non-fast qualifiers\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 852, __PRETTY_FUNCTION__)); | ||||||
853 | Value.setInt(Value.getInt() & ~Mask); | ||||||
854 | } | ||||||
855 | |||||||
856 | // Creates a type with the given qualifiers in addition to any | ||||||
857 | // qualifiers already on this type. | ||||||
858 | QualType withFastQualifiers(unsigned TQs) const { | ||||||
859 | QualType T = *this; | ||||||
860 | T.addFastQualifiers(TQs); | ||||||
861 | return T; | ||||||
862 | } | ||||||
863 | |||||||
864 | // Creates a type with exactly the given fast qualifiers, removing | ||||||
865 | // any existing fast qualifiers. | ||||||
866 | QualType withExactLocalFastQualifiers(unsigned TQs) const { | ||||||
867 | return withoutLocalFastQualifiers().withFastQualifiers(TQs); | ||||||
868 | } | ||||||
869 | |||||||
870 | // Removes fast qualifiers, but leaves any extended qualifiers in place. | ||||||
871 | QualType withoutLocalFastQualifiers() const { | ||||||
872 | QualType T = *this; | ||||||
873 | T.removeLocalFastQualifiers(); | ||||||
874 | return T; | ||||||
875 | } | ||||||
876 | |||||||
877 | QualType getCanonicalType() const; | ||||||
878 | |||||||
879 | /// Return this type with all of the instance-specific qualifiers | ||||||
880 | /// removed, but without removing any qualifiers that may have been applied | ||||||
881 | /// through typedefs. | ||||||
882 | QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } | ||||||
883 | |||||||
884 | /// Retrieve the unqualified variant of the given type, | ||||||
885 | /// removing as little sugar as possible. | ||||||
886 | /// | ||||||
887 | /// This routine looks through various kinds of sugar to find the | ||||||
888 | /// least-desugared type that is unqualified. For example, given: | ||||||
889 | /// | ||||||
890 | /// \code | ||||||
891 | /// typedef int Integer; | ||||||
892 | /// typedef const Integer CInteger; | ||||||
893 | /// typedef CInteger DifferenceType; | ||||||
894 | /// \endcode | ||||||
895 | /// | ||||||
896 | /// Executing \c getUnqualifiedType() on the type \c DifferenceType will | ||||||
897 | /// desugar until we hit the type \c Integer, which has no qualifiers on it. | ||||||
898 | /// | ||||||
899 | /// The resulting type might still be qualified if it's sugar for an array | ||||||
900 | /// type. To strip qualifiers even from within a sugared array type, use | ||||||
901 | /// ASTContext::getUnqualifiedArrayType. | ||||||
902 | inline QualType getUnqualifiedType() const; | ||||||
903 | |||||||
904 | /// Retrieve the unqualified variant of the given type, removing as little | ||||||
905 | /// sugar as possible. | ||||||
906 | /// | ||||||
907 | /// Like getUnqualifiedType(), but also returns the set of | ||||||
908 | /// qualifiers that were built up. | ||||||
909 | /// | ||||||
910 | /// The resulting type might still be qualified if it's sugar for an array | ||||||
911 | /// type. To strip qualifiers even from within a sugared array type, use | ||||||
912 | /// ASTContext::getUnqualifiedArrayType. | ||||||
913 | inline SplitQualType getSplitUnqualifiedType() const; | ||||||
914 | |||||||
915 | /// Determine whether this type is more qualified than the other | ||||||
916 | /// given type, requiring exact equality for non-CVR qualifiers. | ||||||
917 | bool isMoreQualifiedThan(QualType Other) const; | ||||||
918 | |||||||
919 | /// Determine whether this type is at least as qualified as the other | ||||||
920 | /// given type, requiring exact equality for non-CVR qualifiers. | ||||||
921 | bool isAtLeastAsQualifiedAs(QualType Other) const; | ||||||
922 | |||||||
923 | QualType getNonReferenceType() const; | ||||||
924 | |||||||
925 | /// Determine the type of a (typically non-lvalue) expression with the | ||||||
926 | /// specified result type. | ||||||
927 | /// | ||||||
928 | /// This routine should be used for expressions for which the return type is | ||||||
929 | /// explicitly specified (e.g., in a cast or call) and isn't necessarily | ||||||
930 | /// an lvalue. It removes a top-level reference (since there are no | ||||||
931 | /// expressions of reference type) and deletes top-level cvr-qualifiers | ||||||
932 | /// from non-class types (in C++) or all types (in C). | ||||||
933 | QualType getNonLValueExprType(const ASTContext &Context) const; | ||||||
934 | |||||||
935 | /// Return the specified type with any "sugar" removed from | ||||||
936 | /// the type. This takes off typedefs, typeof's etc. If the outer level of | ||||||
937 | /// the type is already concrete, it returns it unmodified. This is similar | ||||||
938 | /// to getting the canonical type, but it doesn't remove *all* typedefs. For | ||||||
939 | /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is | ||||||
940 | /// concrete. | ||||||
941 | /// | ||||||
942 | /// Qualifiers are left in place. | ||||||
943 | QualType getDesugaredType(const ASTContext &Context) const { | ||||||
944 | return getDesugaredType(*this, Context); | ||||||
945 | } | ||||||
946 | |||||||
947 | SplitQualType getSplitDesugaredType() const { | ||||||
948 | return getSplitDesugaredType(*this); | ||||||
949 | } | ||||||
950 | |||||||
951 | /// Return the specified type with one level of "sugar" removed from | ||||||
952 | /// the type. | ||||||
953 | /// | ||||||
954 | /// This routine takes off the first typedef, typeof, etc. If the outer level | ||||||
955 | /// of the type is already concrete, it returns it unmodified. | ||||||
956 | QualType getSingleStepDesugaredType(const ASTContext &Context) const { | ||||||
957 | return getSingleStepDesugaredTypeImpl(*this, Context); | ||||||
958 | } | ||||||
959 | |||||||
960 | /// Returns the specified type after dropping any | ||||||
961 | /// outer-level parentheses. | ||||||
962 | QualType IgnoreParens() const { | ||||||
963 | if (isa<ParenType>(*this)) | ||||||
964 | return QualType::IgnoreParens(*this); | ||||||
965 | return *this; | ||||||
966 | } | ||||||
967 | |||||||
968 | /// Indicate whether the specified types and qualifiers are identical. | ||||||
969 | friend bool operator==(const QualType &LHS, const QualType &RHS) { | ||||||
970 | return LHS.Value == RHS.Value; | ||||||
971 | } | ||||||
972 | friend bool operator!=(const QualType &LHS, const QualType &RHS) { | ||||||
973 | return LHS.Value != RHS.Value; | ||||||
974 | } | ||||||
975 | friend bool operator<(const QualType &LHS, const QualType &RHS) { | ||||||
976 | return LHS.Value < RHS.Value; | ||||||
977 | } | ||||||
978 | |||||||
979 | static std::string getAsString(SplitQualType split, | ||||||
980 | const PrintingPolicy &Policy) { | ||||||
981 | return getAsString(split.Ty, split.Quals, Policy); | ||||||
982 | } | ||||||
983 | static std::string getAsString(const Type *ty, Qualifiers qs, | ||||||
984 | const PrintingPolicy &Policy); | ||||||
985 | |||||||
986 | std::string getAsString() const; | ||||||
987 | std::string getAsString(const PrintingPolicy &Policy) const; | ||||||
988 | |||||||
989 | void print(raw_ostream &OS, const PrintingPolicy &Policy, | ||||||
990 | const Twine &PlaceHolder = Twine(), | ||||||
991 | unsigned Indentation = 0) const; | ||||||
992 | |||||||
993 | static void print(SplitQualType split, raw_ostream &OS, | ||||||
994 | const PrintingPolicy &policy, const Twine &PlaceHolder, | ||||||
995 | unsigned Indentation = 0) { | ||||||
996 | return print(split.Ty, split.Quals, OS, policy, PlaceHolder, Indentation); | ||||||
997 | } | ||||||
998 | |||||||
999 | static void print(const Type *ty, Qualifiers qs, | ||||||
1000 | raw_ostream &OS, const PrintingPolicy &policy, | ||||||
1001 | const Twine &PlaceHolder, | ||||||
1002 | unsigned Indentation = 0); | ||||||
1003 | |||||||
1004 | void getAsStringInternal(std::string &Str, | ||||||
1005 | const PrintingPolicy &Policy) const; | ||||||
1006 | |||||||
1007 | static void getAsStringInternal(SplitQualType split, std::string &out, | ||||||
1008 | const PrintingPolicy &policy) { | ||||||
1009 | return getAsStringInternal(split.Ty, split.Quals, out, policy); | ||||||
1010 | } | ||||||
1011 | |||||||
1012 | static void getAsStringInternal(const Type *ty, Qualifiers qs, | ||||||
1013 | std::string &out, | ||||||
1014 | const PrintingPolicy &policy); | ||||||
1015 | |||||||
1016 | class StreamedQualTypeHelper { | ||||||
1017 | const QualType &T; | ||||||
1018 | const PrintingPolicy &Policy; | ||||||
1019 | const Twine &PlaceHolder; | ||||||
1020 | unsigned Indentation; | ||||||
1021 | |||||||
1022 | public: | ||||||
1023 | StreamedQualTypeHelper(const QualType &T, const PrintingPolicy &Policy, | ||||||
1024 | const Twine &PlaceHolder, unsigned Indentation) | ||||||
1025 | : T(T), Policy(Policy), PlaceHolder(PlaceHolder), | ||||||
1026 | Indentation(Indentation) {} | ||||||
1027 | |||||||
1028 | friend raw_ostream &operator<<(raw_ostream &OS, | ||||||
1029 | const StreamedQualTypeHelper &SQT) { | ||||||
1030 | SQT.T.print(OS, SQT.Policy, SQT.PlaceHolder, SQT.Indentation); | ||||||
1031 | return OS; | ||||||
1032 | } | ||||||
1033 | }; | ||||||
1034 | |||||||
1035 | StreamedQualTypeHelper stream(const PrintingPolicy &Policy, | ||||||
1036 | const Twine &PlaceHolder = Twine(), | ||||||
1037 | unsigned Indentation = 0) const { | ||||||
1038 | return StreamedQualTypeHelper(*this, Policy, PlaceHolder, Indentation); | ||||||
1039 | } | ||||||
1040 | |||||||
1041 | void dump(const char *s) const; | ||||||
1042 | void dump() const; | ||||||
1043 | void dump(llvm::raw_ostream &OS) const; | ||||||
1044 | |||||||
1045 | void Profile(llvm::FoldingSetNodeID &ID) const { | ||||||
1046 | ID.AddPointer(getAsOpaquePtr()); | ||||||
1047 | } | ||||||
1048 | |||||||
1049 | /// Return the address space of this type. | ||||||
1050 | inline LangAS getAddressSpace() const; | ||||||
1051 | |||||||
1052 | /// Returns gc attribute of this type. | ||||||
1053 | inline Qualifiers::GC getObjCGCAttr() const; | ||||||
1054 | |||||||
1055 | /// true when Type is objc's weak. | ||||||
1056 | bool isObjCGCWeak() const { | ||||||
1057 | return getObjCGCAttr() == Qualifiers::Weak; | ||||||
1058 | } | ||||||
1059 | |||||||
1060 | /// true when Type is objc's strong. | ||||||
1061 | bool isObjCGCStrong() const { | ||||||
1062 | return getObjCGCAttr() == Qualifiers::Strong; | ||||||
1063 | } | ||||||
1064 | |||||||
1065 | /// Returns lifetime attribute of this type. | ||||||
1066 | Qualifiers::ObjCLifetime getObjCLifetime() const { | ||||||
1067 | return getQualifiers().getObjCLifetime(); | ||||||
1068 | } | ||||||
1069 | |||||||
1070 | bool hasNonTrivialObjCLifetime() const { | ||||||
1071 | return getQualifiers().hasNonTrivialObjCLifetime(); | ||||||
1072 | } | ||||||
1073 | |||||||
1074 | bool hasStrongOrWeakObjCLifetime() const { | ||||||
1075 | return getQualifiers().hasStrongOrWeakObjCLifetime(); | ||||||
1076 | } | ||||||
1077 | |||||||
1078 | // true when Type is objc's weak and weak is enabled but ARC isn't. | ||||||
1079 | bool isNonWeakInMRRWithObjCWeak(const ASTContext &Context) const; | ||||||
1080 | |||||||
1081 | enum PrimitiveDefaultInitializeKind { | ||||||
1082 | /// The type does not fall into any of the following categories. Note that | ||||||
1083 | /// this case is zero-valued so that values of this enum can be used as a | ||||||
1084 | /// boolean condition for non-triviality. | ||||||
1085 | PDIK_Trivial, | ||||||
1086 | |||||||
1087 | /// The type is an Objective-C retainable pointer type that is qualified | ||||||
1088 | /// with the ARC __strong qualifier. | ||||||
1089 | PDIK_ARCStrong, | ||||||
1090 | |||||||
1091 | /// The type is an Objective-C retainable pointer type that is qualified | ||||||
1092 | /// with the ARC __weak qualifier. | ||||||
1093 | PDIK_ARCWeak, | ||||||
1094 | |||||||
1095 | /// The type is a struct containing a field whose type is not PCK_Trivial. | ||||||
1096 | PDIK_Struct | ||||||
1097 | }; | ||||||
1098 | |||||||
1099 | /// Functions to query basic properties of non-trivial C struct types. | ||||||
1100 | |||||||
1101 | /// Check if this is a non-trivial type that would cause a C struct | ||||||
1102 | /// transitively containing this type to be non-trivial to default initialize | ||||||
1103 | /// and return the kind. | ||||||
1104 | PrimitiveDefaultInitializeKind | ||||||
1105 | isNonTrivialToPrimitiveDefaultInitialize() const; | ||||||
1106 | |||||||
1107 | enum PrimitiveCopyKind { | ||||||
1108 | /// The type does not fall into any of the following categories. Note that | ||||||
1109 | /// this case is zero-valued so that values of this enum can be used as a | ||||||
1110 | /// boolean condition for non-triviality. | ||||||
1111 | PCK_Trivial, | ||||||
1112 | |||||||
1113 | /// The type would be trivial except that it is volatile-qualified. Types | ||||||
1114 | /// that fall into one of the other non-trivial cases may additionally be | ||||||
1115 | /// volatile-qualified. | ||||||
1116 | PCK_VolatileTrivial, | ||||||
1117 | |||||||
1118 | /// The type is an Objective-C retainable pointer type that is qualified | ||||||
1119 | /// with the ARC __strong qualifier. | ||||||
1120 | PCK_ARCStrong, | ||||||
1121 | |||||||
1122 | /// The type is an Objective-C retainable pointer type that is qualified | ||||||
1123 | /// with the ARC __weak qualifier. | ||||||
1124 | PCK_ARCWeak, | ||||||
1125 | |||||||
1126 | /// The type is a struct containing a field whose type is neither | ||||||
1127 | /// PCK_Trivial nor PCK_VolatileTrivial. | ||||||
1128 | /// Note that a C++ struct type does not necessarily match this; C++ copying | ||||||
1129 | /// semantics are too complex to express here, in part because they depend | ||||||
1130 | /// on the exact constructor or assignment operator that is chosen by | ||||||
1131 | /// overload resolution to do the copy. | ||||||
1132 | PCK_Struct | ||||||
1133 | }; | ||||||
1134 | |||||||
1135 | /// Check if this is a non-trivial type that would cause a C struct | ||||||
1136 | /// transitively containing this type to be non-trivial to copy and return the | ||||||
1137 | /// kind. | ||||||
1138 | PrimitiveCopyKind isNonTrivialToPrimitiveCopy() const; | ||||||
1139 | |||||||
1140 | /// Check if this is a non-trivial type that would cause a C struct | ||||||
1141 | /// transitively containing this type to be non-trivial to destructively | ||||||
1142 | /// move and return the kind. Destructive move in this context is a C++-style | ||||||
1143 | /// move in which the source object is placed in a valid but unspecified state | ||||||
1144 | /// after it is moved, as opposed to a truly destructive move in which the | ||||||
1145 | /// source object is placed in an uninitialized state. | ||||||
1146 | PrimitiveCopyKind isNonTrivialToPrimitiveDestructiveMove() const; | ||||||
1147 | |||||||
1148 | enum DestructionKind { | ||||||
1149 | DK_none, | ||||||
1150 | DK_cxx_destructor, | ||||||
1151 | DK_objc_strong_lifetime, | ||||||
1152 | DK_objc_weak_lifetime, | ||||||
1153 | DK_nontrivial_c_struct | ||||||
1154 | }; | ||||||
1155 | |||||||
1156 | /// Returns a nonzero value if objects of this type require | ||||||
1157 | /// non-trivial work to clean up after. Non-zero because it's | ||||||
1158 | /// conceivable that qualifiers (objc_gc(weak)?) could make | ||||||
1159 | /// something require destruction. | ||||||
1160 | DestructionKind isDestructedType() const { | ||||||
1161 | return isDestructedTypeImpl(*this); | ||||||
1162 | } | ||||||
1163 | |||||||
1164 | /// Check if this is or contains a C union that is non-trivial to | ||||||
1165 | /// default-initialize, which is a union that has a member that is non-trivial | ||||||
1166 | /// to default-initialize. If this returns true, | ||||||
1167 | /// isNonTrivialToPrimitiveDefaultInitialize returns PDIK_Struct. | ||||||
1168 | bool hasNonTrivialToPrimitiveDefaultInitializeCUnion() const; | ||||||
1169 | |||||||
1170 | /// Check if this is or contains a C union that is non-trivial to destruct, | ||||||
1171 | /// which is a union that has a member that is non-trivial to destruct. If | ||||||
1172 | /// this returns true, isDestructedType returns DK_nontrivial_c_struct. | ||||||
1173 | bool hasNonTrivialToPrimitiveDestructCUnion() const; | ||||||
1174 | |||||||
1175 | /// Check if this is or contains a C union that is non-trivial to copy, which | ||||||
1176 | /// is a union that has a member that is non-trivial to copy. If this returns | ||||||
1177 | /// true, isNonTrivialToPrimitiveCopy returns PCK_Struct. | ||||||
1178 | bool hasNonTrivialToPrimitiveCopyCUnion() const; | ||||||
1179 | |||||||
1180 | /// Determine whether expressions of the given type are forbidden | ||||||
1181 | /// from being lvalues in C. | ||||||
1182 | /// | ||||||
1183 | /// The expression types that are forbidden to be lvalues are: | ||||||
1184 | /// - 'void', but not qualified void | ||||||
1185 | /// - function types | ||||||
1186 | /// | ||||||
1187 | /// The exact rule here is C99 6.3.2.1: | ||||||
1188 | /// An lvalue is an expression with an object type or an incomplete | ||||||
1189 | /// type other than void. | ||||||
1190 | bool isCForbiddenLValueType() const; | ||||||
1191 | |||||||
1192 | /// Substitute type arguments for the Objective-C type parameters used in the | ||||||
1193 | /// subject type. | ||||||
1194 | /// | ||||||
1195 | /// \param ctx ASTContext in which the type exists. | ||||||
1196 | /// | ||||||
1197 | /// \param typeArgs The type arguments that will be substituted for the | ||||||
1198 | /// Objective-C type parameters in the subject type, which are generally | ||||||
1199 | /// computed via \c Type::getObjCSubstitutions. If empty, the type | ||||||
1200 | /// parameters will be replaced with their bounds or id/Class, as appropriate | ||||||
1201 | /// for the context. | ||||||
1202 | /// | ||||||
1203 | /// \param context The context in which the subject type was written. | ||||||
1204 | /// | ||||||
1205 | /// \returns the resulting type. | ||||||
1206 | QualType substObjCTypeArgs(ASTContext &ctx, | ||||||
1207 | ArrayRef<QualType> typeArgs, | ||||||
1208 | ObjCSubstitutionContext context) const; | ||||||
1209 | |||||||
1210 | /// Substitute type arguments from an object type for the Objective-C type | ||||||
1211 | /// parameters used in the subject type. | ||||||
1212 | /// | ||||||
1213 | /// This operation combines the computation of type arguments for | ||||||
1214 | /// substitution (\c Type::getObjCSubstitutions) with the actual process of | ||||||
1215 | /// substitution (\c QualType::substObjCTypeArgs) for the convenience of | ||||||
1216 | /// callers that need to perform a single substitution in isolation. | ||||||
1217 | /// | ||||||
1218 | /// \param objectType The type of the object whose member type we're | ||||||
1219 | /// substituting into. For example, this might be the receiver of a message | ||||||
1220 | /// or the base of a property access. | ||||||
1221 | /// | ||||||
1222 | /// \param dc The declaration context from which the subject type was | ||||||
1223 | /// retrieved, which indicates (for example) which type parameters should | ||||||
1224 | /// be substituted. | ||||||
1225 | /// | ||||||
1226 | /// \param context The context in which the subject type was written. | ||||||
1227 | /// | ||||||
1228 | /// \returns the subject type after replacing all of the Objective-C type | ||||||
1229 | /// parameters with their corresponding arguments. | ||||||
1230 | QualType substObjCMemberType(QualType objectType, | ||||||
1231 | const DeclContext *dc, | ||||||
1232 | ObjCSubstitutionContext context) const; | ||||||
1233 | |||||||
1234 | /// Strip Objective-C "__kindof" types from the given type. | ||||||
1235 | QualType stripObjCKindOfType(const ASTContext &ctx) const; | ||||||
1236 | |||||||
1237 | /// Remove all qualifiers including _Atomic. | ||||||
1238 | QualType getAtomicUnqualifiedType() const; | ||||||
1239 | |||||||
1240 | private: | ||||||
1241 | // These methods are implemented in a separate translation unit; | ||||||
1242 | // "static"-ize them to avoid creating temporary QualTypes in the | ||||||
1243 | // caller. | ||||||
1244 | static bool isConstant(QualType T, const ASTContext& Ctx); | ||||||
1245 | static QualType getDesugaredType(QualType T, const ASTContext &Context); | ||||||
1246 | static SplitQualType getSplitDesugaredType(QualType T); | ||||||
1247 | static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); | ||||||
1248 | static QualType getSingleStepDesugaredTypeImpl(QualType type, | ||||||
1249 | const ASTContext &C); | ||||||
1250 | static QualType IgnoreParens(QualType T); | ||||||
1251 | static DestructionKind isDestructedTypeImpl(QualType type); | ||||||
1252 | |||||||
1253 | /// Check if \param RD is or contains a non-trivial C union. | ||||||
1254 | static bool hasNonTrivialToPrimitiveDefaultInitializeCUnion(const RecordDecl *RD); | ||||||
1255 | static bool hasNonTrivialToPrimitiveDestructCUnion(const RecordDecl *RD); | ||||||
1256 | static bool hasNonTrivialToPrimitiveCopyCUnion(const RecordDecl *RD); | ||||||
1257 | }; | ||||||
1258 | |||||||
1259 | } // namespace clang | ||||||
1260 | |||||||
1261 | namespace llvm { | ||||||
1262 | |||||||
1263 | /// Implement simplify_type for QualType, so that we can dyn_cast from QualType | ||||||
1264 | /// to a specific Type class. | ||||||
1265 | template<> struct simplify_type< ::clang::QualType> { | ||||||
1266 | using SimpleType = const ::clang::Type *; | ||||||
1267 | |||||||
1268 | static SimpleType getSimplifiedValue(::clang::QualType Val) { | ||||||
1269 | return Val.getTypePtr(); | ||||||
1270 | } | ||||||
1271 | }; | ||||||
1272 | |||||||
1273 | // Teach SmallPtrSet that QualType is "basically a pointer". | ||||||
1274 | template<> | ||||||
1275 | struct PointerLikeTypeTraits<clang::QualType> { | ||||||
1276 | static inline void *getAsVoidPointer(clang::QualType P) { | ||||||
1277 | return P.getAsOpaquePtr(); | ||||||
1278 | } | ||||||
1279 | |||||||
1280 | static inline clang::QualType getFromVoidPointer(void *P) { | ||||||
1281 | return clang::QualType::getFromOpaquePtr(P); | ||||||
1282 | } | ||||||
1283 | |||||||
1284 | // Various qualifiers go in low bits. | ||||||
1285 | enum { NumLowBitsAvailable = 0 }; | ||||||
1286 | }; | ||||||
1287 | |||||||
1288 | } // namespace llvm | ||||||
1289 | |||||||
1290 | namespace clang { | ||||||
1291 | |||||||
1292 | /// Base class that is common to both the \c ExtQuals and \c Type | ||||||
1293 | /// classes, which allows \c QualType to access the common fields between the | ||||||
1294 | /// two. | ||||||
1295 | class ExtQualsTypeCommonBase { | ||||||
1296 | friend class ExtQuals; | ||||||
1297 | friend class QualType; | ||||||
1298 | friend class Type; | ||||||
1299 | |||||||
1300 | /// The "base" type of an extended qualifiers type (\c ExtQuals) or | ||||||
1301 | /// a self-referential pointer (for \c Type). | ||||||
1302 | /// | ||||||
1303 | /// This pointer allows an efficient mapping from a QualType to its | ||||||
1304 | /// underlying type pointer. | ||||||
1305 | const Type *const BaseType; | ||||||
1306 | |||||||
1307 | /// The canonical type of this type. A QualType. | ||||||
1308 | QualType CanonicalType; | ||||||
1309 | |||||||
1310 | ExtQualsTypeCommonBase(const Type *baseType, QualType canon) | ||||||
1311 | : BaseType(baseType), CanonicalType(canon) {} | ||||||
1312 | }; | ||||||
1313 | |||||||
1314 | /// We can encode up to four bits in the low bits of a | ||||||
1315 | /// type pointer, but there are many more type qualifiers that we want | ||||||
1316 | /// to be able to apply to an arbitrary type. Therefore we have this | ||||||
1317 | /// struct, intended to be heap-allocated and used by QualType to | ||||||
1318 | /// store qualifiers. | ||||||
1319 | /// | ||||||
1320 | /// The current design tags the 'const', 'restrict', and 'volatile' qualifiers | ||||||
1321 | /// in three low bits on the QualType pointer; a fourth bit records whether | ||||||
1322 | /// the pointer is an ExtQuals node. The extended qualifiers (address spaces, | ||||||
1323 | /// Objective-C GC attributes) are much more rare. | ||||||
1324 | class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { | ||||||
1325 | // NOTE: changing the fast qualifiers should be straightforward as | ||||||
1326 | // long as you don't make 'const' non-fast. | ||||||
1327 | // 1. Qualifiers: | ||||||
1328 | // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). | ||||||
1329 | // Fast qualifiers must occupy the low-order bits. | ||||||
1330 | // b) Update Qualifiers::FastWidth and FastMask. | ||||||
1331 | // 2. QualType: | ||||||
1332 | // a) Update is{Volatile,Restrict}Qualified(), defined inline. | ||||||
1333 | // b) Update remove{Volatile,Restrict}, defined near the end of | ||||||
1334 | // this header. | ||||||
1335 | // 3. ASTContext: | ||||||
1336 | // a) Update get{Volatile,Restrict}Type. | ||||||
1337 | |||||||
1338 | /// The immutable set of qualifiers applied by this node. Always contains | ||||||
1339 | /// extended qualifiers. | ||||||
1340 | Qualifiers Quals; | ||||||
1341 | |||||||
1342 | ExtQuals *this_() { return this; } | ||||||
1343 | |||||||
1344 | public: | ||||||
1345 | ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) | ||||||
1346 | : ExtQualsTypeCommonBase(baseType, | ||||||
1347 | canon.isNull() ? QualType(this_(), 0) : canon), | ||||||
1348 | Quals(quals) { | ||||||
1349 | assert(Quals.hasNonFastQualifiers()((Quals.hasNonFastQualifiers() && "ExtQuals created with no fast qualifiers" ) ? static_cast<void> (0) : __assert_fail ("Quals.hasNonFastQualifiers() && \"ExtQuals created with no fast qualifiers\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 1350, __PRETTY_FUNCTION__)) | ||||||
1350 | && "ExtQuals created with no fast qualifiers")((Quals.hasNonFastQualifiers() && "ExtQuals created with no fast qualifiers" ) ? static_cast<void> (0) : __assert_fail ("Quals.hasNonFastQualifiers() && \"ExtQuals created with no fast qualifiers\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 1350, __PRETTY_FUNCTION__)); | ||||||
1351 | assert(!Quals.hasFastQualifiers()((!Quals.hasFastQualifiers() && "ExtQuals created with fast qualifiers" ) ? static_cast<void> (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"ExtQuals created with fast qualifiers\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 1352, __PRETTY_FUNCTION__)) | ||||||
1352 | && "ExtQuals created with fast qualifiers")((!Quals.hasFastQualifiers() && "ExtQuals created with fast qualifiers" ) ? static_cast<void> (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"ExtQuals created with fast qualifiers\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 1352, __PRETTY_FUNCTION__)); | ||||||
1353 | } | ||||||
1354 | |||||||
1355 | Qualifiers getQualifiers() const { return Quals; } | ||||||
1356 | |||||||
1357 | bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } | ||||||
1358 | Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } | ||||||
1359 | |||||||
1360 | bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); } | ||||||
1361 | Qualifiers::ObjCLifetime getObjCLifetime() const { | ||||||
1362 | return Quals.getObjCLifetime(); | ||||||
1363 | } | ||||||
1364 | |||||||
1365 | bool hasAddressSpace() const { return Quals.hasAddressSpace(); } | ||||||
1366 | LangAS getAddressSpace() const { return Quals.getAddressSpace(); } | ||||||
1367 | |||||||
1368 | const Type *getBaseType() const { return BaseType; } | ||||||
1369 | |||||||
1370 | public: | ||||||
1371 | void Profile(llvm::FoldingSetNodeID &ID) const { | ||||||
1372 | Profile(ID, getBaseType(), Quals); | ||||||
1373 | } | ||||||
1374 | |||||||
1375 | static void Profile(llvm::FoldingSetNodeID &ID, | ||||||
1376 | const Type *BaseType, | ||||||
1377 | Qualifiers Quals) { | ||||||
1378 | assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!")((!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!" ) ? static_cast<void> (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"fast qualifiers in ExtQuals hash!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 1378, __PRETTY_FUNCTION__)); | ||||||
1379 | ID.AddPointer(BaseType); | ||||||
1380 | Quals.Profile(ID); | ||||||
1381 | } | ||||||
1382 | }; | ||||||
1383 | |||||||
1384 | /// The kind of C++11 ref-qualifier associated with a function type. | ||||||
1385 | /// This determines whether a member function's "this" object can be an | ||||||
1386 | /// lvalue, rvalue, or neither. | ||||||
1387 | enum RefQualifierKind { | ||||||
1388 | /// No ref-qualifier was provided. | ||||||
1389 | RQ_None = 0, | ||||||
1390 | |||||||
1391 | /// An lvalue ref-qualifier was provided (\c &). | ||||||
1392 | RQ_LValue, | ||||||
1393 | |||||||
1394 | /// An rvalue ref-qualifier was provided (\c &&). | ||||||
1395 | RQ_RValue | ||||||
1396 | }; | ||||||
1397 | |||||||
1398 | /// Which keyword(s) were used to create an AutoType. | ||||||
1399 | enum class AutoTypeKeyword { | ||||||
1400 | /// auto | ||||||
1401 | Auto, | ||||||
1402 | |||||||
1403 | /// decltype(auto) | ||||||
1404 | DecltypeAuto, | ||||||
1405 | |||||||
1406 | /// __auto_type (GNU extension) | ||||||
1407 | GNUAutoType | ||||||
1408 | }; | ||||||
1409 | |||||||
1410 | /// The base class of the type hierarchy. | ||||||
1411 | /// | ||||||
1412 | /// A central concept with types is that each type always has a canonical | ||||||
1413 | /// type. A canonical type is the type with any typedef names stripped out | ||||||
1414 | /// of it or the types it references. For example, consider: | ||||||
1415 | /// | ||||||
1416 | /// typedef int foo; | ||||||
1417 | /// typedef foo* bar; | ||||||
1418 | /// 'int *' 'foo *' 'bar' | ||||||
1419 | /// | ||||||
1420 | /// There will be a Type object created for 'int'. Since int is canonical, its | ||||||
1421 | /// CanonicalType pointer points to itself. There is also a Type for 'foo' (a | ||||||
1422 | /// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next | ||||||
1423 | /// there is a PointerType that represents 'int*', which, like 'int', is | ||||||
1424 | /// canonical. Finally, there is a PointerType type for 'foo*' whose canonical | ||||||
1425 | /// type is 'int*', and there is a TypedefType for 'bar', whose canonical type | ||||||
1426 | /// is also 'int*'. | ||||||
1427 | /// | ||||||
1428 | /// Non-canonical types are useful for emitting diagnostics, without losing | ||||||
1429 | /// information about typedefs being used. Canonical types are useful for type | ||||||
1430 | /// comparisons (they allow by-pointer equality tests) and useful for reasoning | ||||||
1431 | /// about whether something has a particular form (e.g. is a function type), | ||||||
1432 | /// because they implicitly, recursively, strip all typedefs out of a type. | ||||||
1433 | /// | ||||||
1434 | /// Types, once created, are immutable. | ||||||
1435 | /// | ||||||
1436 | class alignas(8) Type : public ExtQualsTypeCommonBase { | ||||||
1437 | public: | ||||||
1438 | enum TypeClass { | ||||||
1439 | #define TYPE(Class, Base) Class, | ||||||
1440 | #define LAST_TYPE(Class) TypeLast = Class | ||||||
1441 | #define ABSTRACT_TYPE(Class, Base) | ||||||
1442 | #include "clang/AST/TypeNodes.inc" | ||||||
1443 | }; | ||||||
1444 | |||||||
1445 | private: | ||||||
1446 | /// Bitfields required by the Type class. | ||||||
1447 | class TypeBitfields { | ||||||
1448 | friend class Type; | ||||||
1449 | template <class T> friend class TypePropertyCache; | ||||||
1450 | |||||||
1451 | /// TypeClass bitfield - Enum that specifies what subclass this belongs to. | ||||||
1452 | unsigned TC : 8; | ||||||
1453 | |||||||
1454 | /// Whether this type is a dependent type (C++ [temp.dep.type]). | ||||||
1455 | unsigned Dependent : 1; | ||||||
1456 | |||||||
1457 | /// Whether this type somehow involves a template parameter, even | ||||||
1458 | /// if the resolution of the type does not depend on a template parameter. | ||||||
1459 | unsigned InstantiationDependent : 1; | ||||||
1460 | |||||||
1461 | /// Whether this type is a variably-modified type (C99 6.7.5). | ||||||
1462 | unsigned VariablyModified : 1; | ||||||
1463 | |||||||
1464 | /// Whether this type contains an unexpanded parameter pack | ||||||
1465 | /// (for C++11 variadic templates). | ||||||
1466 | unsigned ContainsUnexpandedParameterPack : 1; | ||||||
1467 | |||||||
1468 | /// True if the cache (i.e. the bitfields here starting with | ||||||
1469 | /// 'Cache') is valid. | ||||||
1470 | mutable unsigned CacheValid : 1; | ||||||
1471 | |||||||
1472 | /// Linkage of this type. | ||||||
1473 | mutable unsigned CachedLinkage : 3; | ||||||
1474 | |||||||
1475 | /// Whether this type involves and local or unnamed types. | ||||||
1476 | mutable unsigned CachedLocalOrUnnamed : 1; | ||||||
1477 | |||||||
1478 | /// Whether this type comes from an AST file. | ||||||
1479 | mutable unsigned FromAST : 1; | ||||||
1480 | |||||||
1481 | bool isCacheValid() const { | ||||||
1482 | return CacheValid; | ||||||
1483 | } | ||||||
1484 | |||||||
1485 | Linkage getLinkage() const { | ||||||
1486 | assert(isCacheValid() && "getting linkage from invalid cache")((isCacheValid() && "getting linkage from invalid cache" ) ? static_cast<void> (0) : __assert_fail ("isCacheValid() && \"getting linkage from invalid cache\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 1486, __PRETTY_FUNCTION__)); | ||||||
1487 | return static_cast<Linkage>(CachedLinkage); | ||||||
1488 | } | ||||||
1489 | |||||||
1490 | bool hasLocalOrUnnamedType() const { | ||||||
1491 | assert(isCacheValid() && "getting linkage from invalid cache")((isCacheValid() && "getting linkage from invalid cache" ) ? static_cast<void> (0) : __assert_fail ("isCacheValid() && \"getting linkage from invalid cache\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 1491, __PRETTY_FUNCTION__)); | ||||||
1492 | return CachedLocalOrUnnamed; | ||||||
1493 | } | ||||||
1494 | }; | ||||||
1495 | enum { NumTypeBits = 18 }; | ||||||
1496 | |||||||
1497 | protected: | ||||||
1498 | // These classes allow subclasses to somewhat cleanly pack bitfields | ||||||
1499 | // into Type. | ||||||
1500 | |||||||
1501 | class ArrayTypeBitfields { | ||||||
1502 | friend class ArrayType; | ||||||
1503 | |||||||
1504 | unsigned : NumTypeBits; | ||||||
1505 | |||||||
1506 | /// CVR qualifiers from declarations like | ||||||
1507 | /// 'int X[static restrict 4]'. For function parameters only. | ||||||
1508 | unsigned IndexTypeQuals : 3; | ||||||
1509 | |||||||
1510 | /// Storage class qualifiers from declarations like | ||||||
1511 | /// 'int X[static restrict 4]'. For function parameters only. | ||||||
1512 | /// Actually an ArrayType::ArraySizeModifier. | ||||||
1513 | unsigned SizeModifier : 3; | ||||||
1514 | }; | ||||||
1515 | |||||||
1516 | class BuiltinTypeBitfields { | ||||||
1517 | friend class BuiltinType; | ||||||
1518 | |||||||
1519 | unsigned : NumTypeBits; | ||||||
1520 | |||||||
1521 | /// The kind (BuiltinType::Kind) of builtin type this is. | ||||||
1522 | unsigned Kind : 8; | ||||||
1523 | }; | ||||||
1524 | |||||||
1525 | /// FunctionTypeBitfields store various bits belonging to FunctionProtoType. | ||||||
1526 | /// Only common bits are stored here. Additional uncommon bits are stored | ||||||
1527 | /// in a trailing object after FunctionProtoType. | ||||||
1528 | class FunctionTypeBitfields { | ||||||
1529 | friend class FunctionProtoType; | ||||||
1530 | friend class FunctionType; | ||||||
1531 | |||||||
1532 | unsigned : NumTypeBits; | ||||||
1533 | |||||||
1534 | /// Extra information which affects how the function is called, like | ||||||
1535 | /// regparm and the calling convention. | ||||||
1536 | unsigned ExtInfo : 12; | ||||||
1537 | |||||||
1538 | /// The ref-qualifier associated with a \c FunctionProtoType. | ||||||
1539 | /// | ||||||
1540 | /// This is a value of type \c RefQualifierKind. | ||||||
1541 | unsigned RefQualifier : 2; | ||||||
1542 | |||||||
1543 | /// Used only by FunctionProtoType, put here to pack with the | ||||||
1544 | /// other bitfields. | ||||||
1545 | /// The qualifiers are part of FunctionProtoType because... | ||||||
1546 | /// | ||||||
1547 | /// C++ 8.3.5p4: The return type, the parameter type list and the | ||||||
1548 | /// cv-qualifier-seq, [...], are part of the function type. | ||||||
1549 | unsigned FastTypeQuals : Qualifiers::FastWidth; | ||||||
1550 | /// Whether this function has extended Qualifiers. | ||||||
1551 | unsigned HasExtQuals : 1; | ||||||
1552 | |||||||
1553 | /// The number of parameters this function has, not counting '...'. | ||||||
1554 | /// According to [implimits] 8 bits should be enough here but this is | ||||||
1555 | /// somewhat easy to exceed with metaprogramming and so we would like to | ||||||
1556 | /// keep NumParams as wide as reasonably possible. | ||||||
1557 | unsigned NumParams : 16; | ||||||
1558 | |||||||
1559 | /// The type of exception specification this function has. | ||||||
1560 | unsigned ExceptionSpecType : 4; | ||||||
1561 | |||||||
1562 | /// Whether this function has extended parameter information. | ||||||
1563 | unsigned HasExtParameterInfos : 1; | ||||||
1564 | |||||||
1565 | /// Whether the function is variadic. | ||||||
1566 | unsigned Variadic : 1; | ||||||
1567 | |||||||
1568 | /// Whether this function has a trailing return type. | ||||||
1569 | unsigned HasTrailingReturn : 1; | ||||||
1570 | }; | ||||||
1571 | |||||||
1572 | class ObjCObjectTypeBitfields { | ||||||
1573 | friend class ObjCObjectType; | ||||||
1574 | |||||||
1575 | unsigned : NumTypeBits; | ||||||
1576 | |||||||
1577 | /// The number of type arguments stored directly on this object type. | ||||||
1578 | unsigned NumTypeArgs : 7; | ||||||
1579 | |||||||
1580 | /// The number of protocols stored directly on this object type. | ||||||
1581 | unsigned NumProtocols : 6; | ||||||
1582 | |||||||
1583 | /// Whether this is a "kindof" type. | ||||||
1584 | unsigned IsKindOf : 1; | ||||||
1585 | }; | ||||||
1586 | |||||||
1587 | class ReferenceTypeBitfields { | ||||||
1588 | friend class ReferenceType; | ||||||
1589 | |||||||
1590 | unsigned : NumTypeBits; | ||||||
1591 | |||||||
1592 | /// True if the type was originally spelled with an lvalue sigil. | ||||||
1593 | /// This is never true of rvalue references but can also be false | ||||||
1594 | /// on lvalue references because of C++0x [dcl.typedef]p9, | ||||||
1595 | /// as follows: | ||||||
1596 | /// | ||||||
1597 | /// typedef int &ref; // lvalue, spelled lvalue | ||||||
1598 | /// typedef int &&rvref; // rvalue | ||||||
1599 | /// ref &a; // lvalue, inner ref, spelled lvalue | ||||||
1600 | /// ref &&a; // lvalue, inner ref | ||||||
1601 | /// rvref &a; // lvalue, inner ref, spelled lvalue | ||||||
1602 | /// rvref &&a; // rvalue, inner ref | ||||||
1603 | unsigned SpelledAsLValue : 1; | ||||||
1604 | |||||||
1605 | /// True if the inner type is a reference type. This only happens | ||||||
1606 | /// in non-canonical forms. | ||||||
1607 | unsigned InnerRef : 1; | ||||||
1608 | }; | ||||||
1609 | |||||||
1610 | class TypeWithKeywordBitfields { | ||||||
1611 | friend class TypeWithKeyword; | ||||||
1612 | |||||||
1613 | unsigned : NumTypeBits; | ||||||
1614 | |||||||
1615 | /// An ElaboratedTypeKeyword. 8 bits for efficient access. | ||||||
1616 | unsigned Keyword : 8; | ||||||
1617 | }; | ||||||
1618 | |||||||
1619 | enum { NumTypeWithKeywordBits = 8 }; | ||||||
1620 | |||||||
1621 | class ElaboratedTypeBitfields { | ||||||
1622 | friend class ElaboratedType; | ||||||
1623 | |||||||
1624 | unsigned : NumTypeBits; | ||||||
1625 | unsigned : NumTypeWithKeywordBits; | ||||||
1626 | |||||||
1627 | /// Whether the ElaboratedType has a trailing OwnedTagDecl. | ||||||
1628 | unsigned HasOwnedTagDecl : 1; | ||||||
1629 | }; | ||||||
1630 | |||||||
1631 | class VectorTypeBitfields { | ||||||
1632 | friend class VectorType; | ||||||
1633 | friend class DependentVectorType; | ||||||
1634 | |||||||
1635 | unsigned : NumTypeBits; | ||||||
1636 | |||||||
1637 | /// The kind of vector, either a generic vector type or some | ||||||
1638 | /// target-specific vector type such as for AltiVec or Neon. | ||||||
1639 | unsigned VecKind : 3; | ||||||
1640 | |||||||
1641 | /// The number of elements in the vector. | ||||||
1642 | unsigned NumElements : 29 - NumTypeBits; | ||||||
1643 | |||||||
1644 | enum { MaxNumElements = (1 << (29 - NumTypeBits)) - 1 }; | ||||||
1645 | }; | ||||||
1646 | |||||||
1647 | class AttributedTypeBitfields { | ||||||
1648 | friend class AttributedType; | ||||||
1649 | |||||||
1650 | unsigned : NumTypeBits; | ||||||
1651 | |||||||
1652 | /// An AttributedType::Kind | ||||||
1653 | unsigned AttrKind : 32 - NumTypeBits; | ||||||
1654 | }; | ||||||
1655 | |||||||
1656 | class AutoTypeBitfields { | ||||||
1657 | friend class AutoType; | ||||||
1658 | |||||||
1659 | unsigned : NumTypeBits; | ||||||
1660 | |||||||
1661 | /// Was this placeholder type spelled as 'auto', 'decltype(auto)', | ||||||
1662 | /// or '__auto_type'? AutoTypeKeyword value. | ||||||
1663 | unsigned Keyword : 2; | ||||||
1664 | }; | ||||||
1665 | |||||||
1666 | class SubstTemplateTypeParmPackTypeBitfields { | ||||||
1667 | friend class SubstTemplateTypeParmPackType; | ||||||
1668 | |||||||
1669 | unsigned : NumTypeBits; | ||||||
1670 | |||||||
1671 | /// The number of template arguments in \c Arguments, which is | ||||||
1672 | /// expected to be able to hold at least 1024 according to [implimits]. | ||||||
1673 | /// However as this limit is somewhat easy to hit with template | ||||||
1674 | /// metaprogramming we'd prefer to keep it as large as possible. | ||||||
1675 | /// At the moment it has been left as a non-bitfield since this type | ||||||
1676 | /// safely fits in 64 bits as an unsigned, so there is no reason to | ||||||
1677 | /// introduce the performance impact of a bitfield. | ||||||
1678 | unsigned NumArgs; | ||||||
1679 | }; | ||||||
1680 | |||||||
1681 | class TemplateSpecializationTypeBitfields { | ||||||
1682 | friend class TemplateSpecializationType; | ||||||
1683 | |||||||
1684 | unsigned : NumTypeBits; | ||||||
1685 | |||||||
1686 | /// Whether this template specialization type is a substituted type alias. | ||||||
1687 | unsigned TypeAlias : 1; | ||||||
1688 | |||||||
1689 | /// The number of template arguments named in this class template | ||||||
1690 | /// specialization, which is expected to be able to hold at least 1024 | ||||||
1691 | /// according to [implimits]. However, as this limit is somewhat easy to | ||||||
1692 | /// hit with template metaprogramming we'd prefer to keep it as large | ||||||
1693 | /// as possible. At the moment it has been left as a non-bitfield since | ||||||
1694 | /// this type safely fits in 64 bits as an unsigned, so there is no reason | ||||||
1695 | /// to introduce the performance impact of a bitfield. | ||||||
1696 | unsigned NumArgs; | ||||||
1697 | }; | ||||||
1698 | |||||||
1699 | class DependentTemplateSpecializationTypeBitfields { | ||||||
1700 | friend class DependentTemplateSpecializationType; | ||||||
1701 | |||||||
1702 | unsigned : NumTypeBits; | ||||||
1703 | unsigned : NumTypeWithKeywordBits; | ||||||
1704 | |||||||
1705 | /// The number of template arguments named in this class template | ||||||
1706 | /// specialization, which is expected to be able to hold at least 1024 | ||||||
1707 | /// according to [implimits]. However, as this limit is somewhat easy to | ||||||
1708 | /// hit with template metaprogramming we'd prefer to keep it as large | ||||||
1709 | /// as possible. At the moment it has been left as a non-bitfield since | ||||||
1710 | /// this type safely fits in 64 bits as an unsigned, so there is no reason | ||||||
1711 | /// to introduce the performance impact of a bitfield. | ||||||
1712 | unsigned NumArgs; | ||||||
1713 | }; | ||||||
1714 | |||||||
1715 | class PackExpansionTypeBitfields { | ||||||
1716 | friend class PackExpansionType; | ||||||
1717 | |||||||
1718 | unsigned : NumTypeBits; | ||||||
1719 | |||||||
1720 | /// The number of expansions that this pack expansion will | ||||||
1721 | /// generate when substituted (+1), which is expected to be able to | ||||||
1722 | /// hold at least 1024 according to [implimits]. However, as this limit | ||||||
1723 | /// is somewhat easy to hit with template metaprogramming we'd prefer to | ||||||
1724 | /// keep it as large as possible. At the moment it has been left as a | ||||||
1725 | /// non-bitfield since this type safely fits in 64 bits as an unsigned, so | ||||||
1726 | /// there is no reason to introduce the performance impact of a bitfield. | ||||||
1727 | /// | ||||||
1728 | /// This field will only have a non-zero value when some of the parameter | ||||||
1729 | /// packs that occur within the pattern have been substituted but others | ||||||
1730 | /// have not. | ||||||
1731 | unsigned NumExpansions; | ||||||
1732 | }; | ||||||
1733 | |||||||
1734 | union { | ||||||
1735 | TypeBitfields TypeBits; | ||||||
1736 | ArrayTypeBitfields ArrayTypeBits; | ||||||
1737 | AttributedTypeBitfields AttributedTypeBits; | ||||||
1738 | AutoTypeBitfields AutoTypeBits; | ||||||
1739 | BuiltinTypeBitfields BuiltinTypeBits; | ||||||
1740 | FunctionTypeBitfields FunctionTypeBits; | ||||||
1741 | ObjCObjectTypeBitfields ObjCObjectTypeBits; | ||||||
1742 | ReferenceTypeBitfields ReferenceTypeBits; | ||||||
1743 | TypeWithKeywordBitfields TypeWithKeywordBits; | ||||||
1744 | ElaboratedTypeBitfields ElaboratedTypeBits; | ||||||
1745 | VectorTypeBitfields VectorTypeBits; | ||||||
1746 | SubstTemplateTypeParmPackTypeBitfields SubstTemplateTypeParmPackTypeBits; | ||||||
1747 | TemplateSpecializationTypeBitfields TemplateSpecializationTypeBits; | ||||||
1748 | DependentTemplateSpecializationTypeBitfields | ||||||
1749 | DependentTemplateSpecializationTypeBits; | ||||||
1750 | PackExpansionTypeBitfields PackExpansionTypeBits; | ||||||
1751 | |||||||
1752 | static_assert(sizeof(TypeBitfields) <= 8, | ||||||
1753 | "TypeBitfields is larger than 8 bytes!"); | ||||||
1754 | static_assert(sizeof(ArrayTypeBitfields) <= 8, | ||||||
1755 | "ArrayTypeBitfields is larger than 8 bytes!"); | ||||||
1756 | static_assert(sizeof(AttributedTypeBitfields) <= 8, | ||||||
1757 | "AttributedTypeBitfields is larger than 8 bytes!"); | ||||||
1758 | static_assert(sizeof(AutoTypeBitfields) <= 8, | ||||||
1759 | "AutoTypeBitfields is larger than 8 bytes!"); | ||||||
1760 | static_assert(sizeof(BuiltinTypeBitfields) <= 8, | ||||||
1761 | "BuiltinTypeBitfields is larger than 8 bytes!"); | ||||||
1762 | static_assert(sizeof(FunctionTypeBitfields) <= 8, | ||||||
1763 | "FunctionTypeBitfields is larger than 8 bytes!"); | ||||||
1764 | static_assert(sizeof(ObjCObjectTypeBitfields) <= 8, | ||||||
1765 | "ObjCObjectTypeBitfields is larger than 8 bytes!"); | ||||||
1766 | static_assert(sizeof(ReferenceTypeBitfields) <= 8, | ||||||
1767 | "ReferenceTypeBitfields is larger than 8 bytes!"); | ||||||
1768 | static_assert(sizeof(TypeWithKeywordBitfields) <= 8, | ||||||
1769 | "TypeWithKeywordBitfields is larger than 8 bytes!"); | ||||||
1770 | static_assert(sizeof(ElaboratedTypeBitfields) <= 8, | ||||||
1771 | "ElaboratedTypeBitfields is larger than 8 bytes!"); | ||||||
1772 | static_assert(sizeof(VectorTypeBitfields) <= 8, | ||||||
1773 | "VectorTypeBitfields is larger than 8 bytes!"); | ||||||
1774 | static_assert(sizeof(SubstTemplateTypeParmPackTypeBitfields) <= 8, | ||||||
1775 | "SubstTemplateTypeParmPackTypeBitfields is larger" | ||||||
1776 | " than 8 bytes!"); | ||||||
1777 | static_assert(sizeof(TemplateSpecializationTypeBitfields) <= 8, | ||||||
1778 | "TemplateSpecializationTypeBitfields is larger" | ||||||
1779 | " than 8 bytes!"); | ||||||
1780 | static_assert(sizeof(DependentTemplateSpecializationTypeBitfields) <= 8, | ||||||
1781 | "DependentTemplateSpecializationTypeBitfields is larger" | ||||||
1782 | " than 8 bytes!"); | ||||||
1783 | static_assert(sizeof(PackExpansionTypeBitfields) <= 8, | ||||||
1784 | "PackExpansionTypeBitfields is larger than 8 bytes"); | ||||||
1785 | }; | ||||||
1786 | |||||||
1787 | private: | ||||||
1788 | template <class T> friend class TypePropertyCache; | ||||||
1789 | |||||||
1790 | /// Set whether this type comes from an AST file. | ||||||
1791 | void setFromAST(bool V = true) const { | ||||||
1792 | TypeBits.FromAST = V; | ||||||
1793 | } | ||||||
1794 | |||||||
1795 | protected: | ||||||
1796 | friend class ASTContext; | ||||||
1797 | |||||||
1798 | Type(TypeClass tc, QualType canon, bool Dependent, | ||||||
1799 | bool InstantiationDependent, bool VariablyModified, | ||||||
1800 | bool ContainsUnexpandedParameterPack) | ||||||
1801 | : ExtQualsTypeCommonBase(this, | ||||||
1802 | canon.isNull() ? QualType(this_(), 0) : canon) { | ||||||
1803 | TypeBits.TC = tc; | ||||||
1804 | TypeBits.Dependent = Dependent; | ||||||
1805 | TypeBits.InstantiationDependent = Dependent || InstantiationDependent; | ||||||
1806 | TypeBits.VariablyModified = VariablyModified; | ||||||
1807 | TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; | ||||||
1808 | TypeBits.CacheValid = false; | ||||||
1809 | TypeBits.CachedLocalOrUnnamed = false; | ||||||
1810 | TypeBits.CachedLinkage = NoLinkage; | ||||||
1811 | TypeBits.FromAST = false; | ||||||
1812 | } | ||||||
1813 | |||||||
1814 | // silence VC++ warning C4355: 'this' : used in base member initializer list | ||||||
1815 | Type *this_() { return this; } | ||||||
1816 | |||||||
1817 | void setDependent(bool D = true) { | ||||||
1818 | TypeBits.Dependent = D; | ||||||
1819 | if (D) | ||||||
1820 | TypeBits.InstantiationDependent = true; | ||||||
1821 | } | ||||||
1822 | |||||||
1823 | void setInstantiationDependent(bool D = true) { | ||||||
1824 | TypeBits.InstantiationDependent = D; } | ||||||
1825 | |||||||
1826 | void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; } | ||||||
1827 | |||||||
1828 | void setContainsUnexpandedParameterPack(bool PP = true) { | ||||||
1829 | TypeBits.ContainsUnexpandedParameterPack = PP; | ||||||
1830 | } | ||||||
1831 | |||||||
1832 | public: | ||||||
1833 | friend class ASTReader; | ||||||
1834 | friend class ASTWriter; | ||||||
1835 | |||||||
1836 | Type(const Type &) = delete; | ||||||
1837 | Type(Type &&) = delete; | ||||||
1838 | Type &operator=(const Type &) = delete; | ||||||
1839 | Type &operator=(Type &&) = delete; | ||||||
1840 | |||||||
1841 | TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } | ||||||
1842 | |||||||
1843 | /// Whether this type comes from an AST file. | ||||||
1844 | bool isFromAST() const { return TypeBits.FromAST; } | ||||||
1845 | |||||||
1846 | /// Whether this type is or contains an unexpanded parameter | ||||||
1847 | /// pack, used to support C++0x variadic templates. | ||||||
1848 | /// | ||||||
1849 | /// A type that contains a parameter pack shall be expanded by the | ||||||
1850 | /// ellipsis operator at some point. For example, the typedef in the | ||||||
1851 | /// following example contains an unexpanded parameter pack 'T': | ||||||
1852 | /// | ||||||
1853 | /// \code | ||||||
1854 | /// template<typename ...T> | ||||||
1855 | /// struct X { | ||||||
1856 | /// typedef T* pointer_types; // ill-formed; T is a parameter pack. | ||||||
1857 | /// }; | ||||||
1858 | /// \endcode | ||||||
1859 | /// | ||||||
1860 | /// Note that this routine does not specify which | ||||||
1861 | bool containsUnexpandedParameterPack() const { | ||||||
1862 | return TypeBits.ContainsUnexpandedParameterPack; | ||||||
1863 | } | ||||||
1864 | |||||||
1865 | /// Determines if this type would be canonical if it had no further | ||||||
1866 | /// qualification. | ||||||
1867 | bool isCanonicalUnqualified() const { | ||||||
1868 | return CanonicalType == QualType(this, 0); | ||||||
1869 | } | ||||||
1870 | |||||||
1871 | /// Pull a single level of sugar off of this locally-unqualified type. | ||||||
1872 | /// Users should generally prefer SplitQualType::getSingleStepDesugaredType() | ||||||
1873 | /// or QualType::getSingleStepDesugaredType(const ASTContext&). | ||||||
1874 | QualType getLocallyUnqualifiedSingleStepDesugaredType() const; | ||||||
1875 | |||||||
1876 | /// Types are partitioned into 3 broad categories (C99 6.2.5p1): | ||||||
1877 | /// object types, function types, and incomplete types. | ||||||
1878 | |||||||
1879 | /// Return true if this is an incomplete type. | ||||||
1880 | /// A type that can describe objects, but which lacks information needed to | ||||||
1881 | /// determine its size (e.g. void, or a fwd declared struct). Clients of this | ||||||
1882 | /// routine will need to determine if the size is actually required. | ||||||
1883 | /// | ||||||
1884 | /// Def If non-null, and the type refers to some kind of declaration | ||||||
1885 | /// that can be completed (such as a C struct, C++ class, or Objective-C | ||||||
1886 | /// class), will be set to the declaration. | ||||||
1887 | bool isIncompleteType(NamedDecl **Def = nullptr) const; | ||||||
1888 | |||||||
1889 | /// Return true if this is an incomplete or object | ||||||
1890 | /// type, in other words, not a function type. | ||||||
1891 | bool isIncompleteOrObjectType() const { | ||||||
1892 | return !isFunctionType(); | ||||||
1893 | } | ||||||
1894 | |||||||
1895 | /// Determine whether this type is an object type. | ||||||
1896 | bool isObjectType() const { | ||||||
1897 | // C++ [basic.types]p8: | ||||||
1898 | // An object type is a (possibly cv-qualified) type that is not a | ||||||
1899 | // function type, not a reference type, and not a void type. | ||||||
1900 | return !isReferenceType() && !isFunctionType() && !isVoidType(); | ||||||
1901 | } | ||||||
1902 | |||||||
1903 | /// Return true if this is a literal type | ||||||
1904 | /// (C++11 [basic.types]p10) | ||||||
1905 | bool isLiteralType(const ASTContext &Ctx) const; | ||||||
1906 | |||||||
1907 | /// Test if this type is a standard-layout type. | ||||||
1908 | /// (C++0x [basic.type]p9) | ||||||
1909 | bool isStandardLayoutType() const; | ||||||
1910 | |||||||
1911 | /// Helper methods to distinguish type categories. All type predicates | ||||||
1912 | /// operate on the canonical type, ignoring typedefs and qualifiers. | ||||||
1913 | |||||||
1914 | /// Returns true if the type is a builtin type. | ||||||
1915 | bool isBuiltinType() const; | ||||||
1916 | |||||||
1917 | /// Test for a particular builtin type. | ||||||
1918 | bool isSpecificBuiltinType(unsigned K) const; | ||||||
1919 | |||||||
1920 | /// Test for a type which does not represent an actual type-system type but | ||||||
1921 | /// is instead used as a placeholder for various convenient purposes within | ||||||
1922 | /// Clang. All such types are BuiltinTypes. | ||||||
1923 | bool isPlaceholderType() const; | ||||||
1924 | const BuiltinType *getAsPlaceholderType() const; | ||||||
1925 | |||||||
1926 | /// Test for a specific placeholder type. | ||||||
1927 | bool isSpecificPlaceholderType(unsigned K) const; | ||||||
1928 | |||||||
1929 | /// Test for a placeholder type other than Overload; see | ||||||
1930 | /// BuiltinType::isNonOverloadPlaceholderType. | ||||||
1931 | bool isNonOverloadPlaceholderType() const; | ||||||
1932 | |||||||
1933 | /// isIntegerType() does *not* include complex integers (a GCC extension). | ||||||
1934 | /// isComplexIntegerType() can be used to test for complex integers. | ||||||
1935 | bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) | ||||||
1936 | bool isEnumeralType() const; | ||||||
1937 | |||||||
1938 | /// Determine whether this type is a scoped enumeration type. | ||||||
1939 | bool isScopedEnumeralType() const; | ||||||
1940 | bool isBooleanType() const; | ||||||
1941 | bool isCharType() const; | ||||||
1942 | bool isWideCharType() const; | ||||||
1943 | bool isChar8Type() const; | ||||||
1944 | bool isChar16Type() const; | ||||||
1945 | bool isChar32Type() const; | ||||||
1946 | bool isAnyCharacterType() const; | ||||||
1947 | bool isIntegralType(const ASTContext &Ctx) const; | ||||||
1948 | |||||||
1949 | /// Determine whether this type is an integral or enumeration type. | ||||||
1950 | bool isIntegralOrEnumerationType() const; | ||||||
1951 | |||||||
1952 | /// Determine whether this type is an integral or unscoped enumeration type. | ||||||
1953 | bool isIntegralOrUnscopedEnumerationType() const; | ||||||
1954 | |||||||
1955 | /// Floating point categories. | ||||||
1956 | bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) | ||||||
1957 | /// isComplexType() does *not* include complex integers (a GCC extension). | ||||||
1958 | /// isComplexIntegerType() can be used to test for complex integers. | ||||||
1959 | bool isComplexType() const; // C99 6.2.5p11 (complex) | ||||||
1960 | bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. | ||||||
1961 | bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) | ||||||
1962 | bool isHalfType() const; // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half) | ||||||
1963 | bool isFloat16Type() const; // C11 extension ISO/IEC TS 18661 | ||||||
1964 | bool isFloat128Type() const; | ||||||
1965 | bool isRealType() const; // C99 6.2.5p17 (real floating + integer) | ||||||
1966 | bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) | ||||||
1967 | bool isVoidType() const; // C99 6.2.5p19 | ||||||
1968 | bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) | ||||||
1969 | bool isAggregateType() const; | ||||||
1970 | bool isFundamentalType() const; | ||||||
1971 | bool isCompoundType() const; | ||||||
1972 | |||||||
1973 | // Type Predicates: Check to see if this type is structurally the specified | ||||||
1974 | // type, ignoring typedefs and qualifiers. | ||||||
1975 | bool isFunctionType() const; | ||||||
1976 | bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } | ||||||
1977 | bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } | ||||||
1978 | bool isPointerType() const; | ||||||
1979 | bool isAnyPointerType() const; // Any C pointer or ObjC object pointer | ||||||
1980 | bool isBlockPointerType() const; | ||||||
1981 | bool isVoidPointerType() const; | ||||||
1982 | bool isReferenceType() const; | ||||||
1983 | bool isLValueReferenceType() const; | ||||||
1984 | bool isRValueReferenceType() const; | ||||||
1985 | bool isFunctionPointerType() const; | ||||||
1986 | bool isFunctionReferenceType() const; | ||||||
1987 | bool isMemberPointerType() const; | ||||||
1988 | bool isMemberFunctionPointerType() const; | ||||||
1989 | bool isMemberDataPointerType() const; | ||||||
1990 | bool isArrayType() const; | ||||||
1991 | bool isConstantArrayType() const; | ||||||
1992 | bool isIncompleteArrayType() const; | ||||||
1993 | bool isVariableArrayType() const; | ||||||
1994 | bool isDependentSizedArrayType() const; | ||||||
1995 | bool isRecordType() const; | ||||||
1996 | bool isClassType() const; | ||||||
1997 | bool isStructureType() const; | ||||||
1998 | bool isObjCBoxableRecordType() const; | ||||||
1999 | bool isInterfaceType() const; | ||||||
2000 | bool isStructureOrClassType() const; | ||||||
2001 | bool isUnionType() const; | ||||||
2002 | bool isComplexIntegerType() const; // GCC _Complex integer type. | ||||||
2003 | bool isVectorType() const; // GCC vector type. | ||||||
2004 | bool isExtVectorType() const; // Extended vector type. | ||||||
2005 | bool isDependentAddressSpaceType() const; // value-dependent address space qualifier | ||||||
2006 | bool isObjCObjectPointerType() const; // pointer to ObjC object | ||||||
2007 | bool isObjCRetainableType() const; // ObjC object or block pointer | ||||||
2008 | bool isObjCLifetimeType() const; // (array of)* retainable type | ||||||
2009 | bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type | ||||||
2010 | bool isObjCNSObjectType() const; // __attribute__((NSObject)) | ||||||
2011 | bool isObjCIndependentClassType() const; // __attribute__((objc_independent_class)) | ||||||
2012 | // FIXME: change this to 'raw' interface type, so we can used 'interface' type | ||||||
2013 | // for the common case. | ||||||
2014 | bool isObjCObjectType() const; // NSString or typeof(*(id)0) | ||||||
2015 | bool isObjCQualifiedInterfaceType() const; // NSString<foo> | ||||||
2016 | bool isObjCQualifiedIdType() const; // id<foo> | ||||||
2017 | bool isObjCQualifiedClassType() const; // Class<foo> | ||||||
2018 | bool isObjCObjectOrInterfaceType() const; | ||||||
2019 | bool isObjCIdType() const; // id | ||||||
2020 | bool isDecltypeType() const; | ||||||
2021 | /// Was this type written with the special inert-in-ARC __unsafe_unretained | ||||||
2022 | /// qualifier? | ||||||
2023 | /// | ||||||
2024 | /// This approximates the answer to the following question: if this | ||||||
2025 | /// translation unit were compiled in ARC, would this type be qualified | ||||||
2026 | /// with __unsafe_unretained? | ||||||
2027 | bool isObjCInertUnsafeUnretainedType() const { | ||||||
2028 | return hasAttr(attr::ObjCInertUnsafeUnretained); | ||||||
2029 | } | ||||||
2030 | |||||||
2031 | /// Whether the type is Objective-C 'id' or a __kindof type of an | ||||||
2032 | /// object type, e.g., __kindof NSView * or __kindof id | ||||||
2033 | /// <NSCopying>. | ||||||
2034 | /// | ||||||
2035 | /// \param bound Will be set to the bound on non-id subtype types, | ||||||
2036 | /// which will be (possibly specialized) Objective-C class type, or | ||||||
2037 | /// null for 'id. | ||||||
2038 | bool isObjCIdOrObjectKindOfType(const ASTContext &ctx, | ||||||
2039 | const ObjCObjectType *&bound) const; | ||||||
2040 | |||||||
2041 | bool isObjCClassType() const; // Class | ||||||
2042 | |||||||
2043 | /// Whether the type is Objective-C 'Class' or a __kindof type of an | ||||||
2044 | /// Class type, e.g., __kindof Class <NSCopying>. | ||||||
2045 | /// | ||||||
2046 | /// Unlike \c isObjCIdOrObjectKindOfType, there is no relevant bound | ||||||
2047 | /// here because Objective-C's type system cannot express "a class | ||||||
2048 | /// object for a subclass of NSFoo". | ||||||
2049 | bool isObjCClassOrClassKindOfType() const; | ||||||
2050 | |||||||
2051 | bool isBlockCompatibleObjCPointerType(ASTContext &ctx) const; | ||||||
2052 | bool isObjCSelType() const; // Class | ||||||
2053 | bool isObjCBuiltinType() const; // 'id' or 'Class' | ||||||
2054 | bool isObjCARCBridgableType() const; | ||||||
2055 | bool isCARCBridgableType() const; | ||||||
2056 | bool isTemplateTypeParmType() const; // C++ template type parameter | ||||||
2057 | bool isNullPtrType() const; // C++11 std::nullptr_t | ||||||
2058 | bool isNothrowT() const; // C++ std::nothrow_t | ||||||
2059 | bool isAlignValT() const; // C++17 std::align_val_t | ||||||
2060 | bool isStdByteType() const; // C++17 std::byte | ||||||
2061 | bool isAtomicType() const; // C11 _Atomic() | ||||||
2062 | |||||||
2063 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ | ||||||
2064 | bool is##Id##Type() const; | ||||||
2065 | #include "clang/Basic/OpenCLImageTypes.def" | ||||||
2066 | |||||||
2067 | bool isImageType() const; // Any OpenCL image type | ||||||
2068 | |||||||
2069 | bool isSamplerT() const; // OpenCL sampler_t | ||||||
2070 | bool isEventT() const; // OpenCL event_t | ||||||
2071 | bool isClkEventT() const; // OpenCL clk_event_t | ||||||
2072 | bool isQueueT() const; // OpenCL queue_t | ||||||
2073 | bool isReserveIDT() const; // OpenCL reserve_id_t | ||||||
2074 | |||||||
2075 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \ | ||||||
2076 | bool is##Id##Type() const; | ||||||
2077 | #include "clang/Basic/OpenCLExtensionTypes.def" | ||||||
2078 | // Type defined in cl_intel_device_side_avc_motion_estimation OpenCL extension | ||||||
2079 | bool isOCLIntelSubgroupAVCType() const; | ||||||
2080 | bool isOCLExtOpaqueType() const; // Any OpenCL extension type | ||||||
2081 | |||||||
2082 | bool isPipeType() const; // OpenCL pipe type | ||||||
2083 | bool isOpenCLSpecificType() const; // Any OpenCL specific type | ||||||
2084 | |||||||
2085 | /// Determines if this type, which must satisfy | ||||||
2086 | /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather | ||||||
2087 | /// than implicitly __strong. | ||||||
2088 | bool isObjCARCImplicitlyUnretainedType() const; | ||||||
2089 | |||||||
2090 | /// Return the implicit lifetime for this type, which must not be dependent. | ||||||
2091 | Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const; | ||||||
2092 | |||||||
2093 | enum ScalarTypeKind { | ||||||
2094 | STK_CPointer, | ||||||
2095 | STK_BlockPointer, | ||||||
2096 | STK_ObjCObjectPointer, | ||||||
2097 | STK_MemberPointer, | ||||||
2098 | STK_Bool, | ||||||
2099 | STK_Integral, | ||||||
2100 | STK_Floating, | ||||||
2101 | STK_IntegralComplex, | ||||||
2102 | STK_FloatingComplex, | ||||||
2103 | STK_FixedPoint | ||||||
2104 | }; | ||||||
2105 | |||||||
2106 | /// Given that this is a scalar type, classify it. | ||||||
2107 | ScalarTypeKind getScalarTypeKind() const; | ||||||
2108 | |||||||
2109 | /// Whether this type is a dependent type, meaning that its definition | ||||||
2110 | /// somehow depends on a template parameter (C++ [temp.dep.type]). | ||||||
2111 | bool isDependentType() const { return TypeBits.Dependent; } | ||||||
2112 | |||||||
2113 | /// Determine whether this type is an instantiation-dependent type, | ||||||
2114 | /// meaning that the type involves a template parameter (even if the | ||||||
2115 | /// definition does not actually depend on the type substituted for that | ||||||
2116 | /// template parameter). | ||||||
2117 | bool isInstantiationDependentType() const { | ||||||
2118 | return TypeBits.InstantiationDependent; | ||||||
2119 | } | ||||||
2120 | |||||||
2121 | /// Determine whether this type is an undeduced type, meaning that | ||||||
2122 | /// it somehow involves a C++11 'auto' type or similar which has not yet been | ||||||
2123 | /// deduced. | ||||||
2124 | bool isUndeducedType() const; | ||||||
2125 | |||||||
2126 | /// Whether this type is a variably-modified type (C99 6.7.5). | ||||||
2127 | bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } | ||||||
2128 | |||||||
2129 | /// Whether this type involves a variable-length array type | ||||||
2130 | /// with a definite size. | ||||||
2131 | bool hasSizedVLAType() const; | ||||||
2132 | |||||||
2133 | /// Whether this type is or contains a local or unnamed type. | ||||||
2134 | bool hasUnnamedOrLocalType() const; | ||||||
2135 | |||||||
2136 | bool isOverloadableType() const; | ||||||
2137 | |||||||
2138 | /// Determine wither this type is a C++ elaborated-type-specifier. | ||||||
2139 | bool isElaboratedTypeSpecifier() const; | ||||||
2140 | |||||||
2141 | bool canDecayToPointerType() const; | ||||||
2142 | |||||||
2143 | /// Whether this type is represented natively as a pointer. This includes | ||||||
2144 | /// pointers, references, block pointers, and Objective-C interface, | ||||||
2145 | /// qualified id, and qualified interface types, as well as nullptr_t. | ||||||
2146 | bool hasPointerRepresentation() const; | ||||||
2147 | |||||||
2148 | /// Whether this type can represent an objective pointer type for the | ||||||
2149 | /// purpose of GC'ability | ||||||
2150 | bool hasObjCPointerRepresentation() const; | ||||||
2151 | |||||||
2152 | /// Determine whether this type has an integer representation | ||||||
2153 | /// of some sort, e.g., it is an integer type or a vector. | ||||||
2154 | bool hasIntegerRepresentation() const; | ||||||
2155 | |||||||
2156 | /// Determine whether this type has an signed integer representation | ||||||
2157 | /// of some sort, e.g., it is an signed integer type or a vector. | ||||||
2158 | bool hasSignedIntegerRepresentation() const; | ||||||
2159 | |||||||
2160 | /// Determine whether this type has an unsigned integer representation | ||||||
2161 | /// of some sort, e.g., it is an unsigned integer type or a vector. | ||||||
2162 | bool hasUnsignedIntegerRepresentation() const; | ||||||
2163 | |||||||
2164 | /// Determine whether this type has a floating-point representation | ||||||
2165 | /// of some sort, e.g., it is a floating-point type or a vector thereof. | ||||||
2166 | bool hasFloatingRepresentation() const; | ||||||
2167 | |||||||
2168 | // Type Checking Functions: Check to see if this type is structurally the | ||||||
2169 | // specified type, ignoring typedefs and qualifiers, and return a pointer to | ||||||
2170 | // the best type we can. | ||||||
2171 | const RecordType *getAsStructureType() const; | ||||||
2172 | /// NOTE: getAs*ArrayType are methods on ASTContext. | ||||||
2173 | const RecordType *getAsUnionType() const; | ||||||
2174 | const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. | ||||||
2175 | const ObjCObjectType *getAsObjCInterfaceType() const; | ||||||
2176 | |||||||
2177 | // The following is a convenience method that returns an ObjCObjectPointerType | ||||||
2178 | // for object declared using an interface. | ||||||
2179 | const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; | ||||||
2180 | const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; | ||||||
2181 | const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; | ||||||
2182 | const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; | ||||||
2183 | |||||||
2184 | /// Retrieves the CXXRecordDecl that this type refers to, either | ||||||
2185 | /// because the type is a RecordType or because it is the injected-class-name | ||||||
2186 | /// type of a class template or class template partial specialization. | ||||||
2187 | CXXRecordDecl *getAsCXXRecordDecl() const; | ||||||
2188 | |||||||
2189 | /// Retrieves the RecordDecl this type refers to. | ||||||
2190 | RecordDecl *getAsRecordDecl() const; | ||||||
2191 | |||||||
2192 | /// Retrieves the TagDecl that this type refers to, either | ||||||
2193 | /// because the type is a TagType or because it is the injected-class-name | ||||||
2194 | /// type of a class template or class template partial specialization. | ||||||
2195 | TagDecl *getAsTagDecl() const; | ||||||
2196 | |||||||
2197 | /// If this is a pointer or reference to a RecordType, return the | ||||||
2198 | /// CXXRecordDecl that the type refers to. | ||||||
2199 | /// | ||||||
2200 | /// If this is not a pointer or reference, or the type being pointed to does | ||||||
2201 | /// not refer to a CXXRecordDecl, returns NULL. | ||||||
2202 | const CXXRecordDecl *getPointeeCXXRecordDecl() const; | ||||||
2203 | |||||||
2204 | /// Get the DeducedType whose type will be deduced for a variable with | ||||||
2205 | /// an initializer of this type. This looks through declarators like pointer | ||||||
2206 | /// types, but not through decltype or typedefs. | ||||||
2207 | DeducedType *getContainedDeducedType() const; | ||||||
2208 | |||||||
2209 | /// Get the AutoType whose type will be deduced for a variable with | ||||||
2210 | /// an initializer of this type. This looks through declarators like pointer | ||||||
2211 | /// types, but not through decltype or typedefs. | ||||||
2212 | AutoType *getContainedAutoType() const { | ||||||
2213 | return dyn_cast_or_null<AutoType>(getContainedDeducedType()); | ||||||
2214 | } | ||||||
2215 | |||||||
2216 | /// Determine whether this type was written with a leading 'auto' | ||||||
2217 | /// corresponding to a trailing return type (possibly for a nested | ||||||
2218 | /// function type within a pointer to function type or similar). | ||||||
2219 | bool hasAutoForTrailingReturnType() const; | ||||||
2220 | |||||||
2221 | /// Member-template getAs<specific type>'. Look through sugar for | ||||||
2222 | /// an instance of \<specific type>. This scheme will eventually | ||||||
2223 | /// replace the specific getAsXXXX methods above. | ||||||
2224 | /// | ||||||
2225 | /// There are some specializations of this member template listed | ||||||
2226 | /// immediately following this class. | ||||||
2227 | template <typename T> const T *getAs() const; | ||||||
2228 | |||||||
2229 | /// Member-template getAsAdjusted<specific type>. Look through specific kinds | ||||||
2230 | /// of sugar (parens, attributes, etc) for an instance of \<specific type>. | ||||||
2231 | /// This is used when you need to walk over sugar nodes that represent some | ||||||
2232 | /// kind of type adjustment from a type that was written as a \<specific type> | ||||||
2233 | /// to another type that is still canonically a \<specific type>. | ||||||
2234 | template <typename T> const T *getAsAdjusted() const; | ||||||
2235 | |||||||
2236 | /// A variant of getAs<> for array types which silently discards | ||||||
2237 | /// qualifiers from the outermost type. | ||||||
2238 | const ArrayType *getAsArrayTypeUnsafe() const; | ||||||
2239 | |||||||
2240 | /// Member-template castAs<specific type>. Look through sugar for | ||||||
2241 | /// the underlying instance of \<specific type>. | ||||||
2242 | /// | ||||||
2243 | /// This method has the same relationship to getAs<T> as cast<T> has | ||||||
2244 | /// to dyn_cast<T>; which is to say, the underlying type *must* | ||||||
2245 | /// have the intended type, and this method will never return null. | ||||||
2246 | template <typename T> const T *castAs() const; | ||||||
2247 | |||||||
2248 | /// A variant of castAs<> for array type which silently discards | ||||||
2249 | /// qualifiers from the outermost type. | ||||||
2250 | const ArrayType *castAsArrayTypeUnsafe() const; | ||||||
2251 | |||||||
2252 | /// Determine whether this type had the specified attribute applied to it | ||||||
2253 | /// (looking through top-level type sugar). | ||||||
2254 | bool hasAttr(attr::Kind AK) const; | ||||||
2255 | |||||||
2256 | /// Get the base element type of this type, potentially discarding type | ||||||
2257 | /// qualifiers. This should never be used when type qualifiers | ||||||
2258 | /// are meaningful. | ||||||
2259 | const Type *getBaseElementTypeUnsafe() const; | ||||||
2260 | |||||||
2261 | /// If this is an array type, return the element type of the array, | ||||||
2262 | /// potentially with type qualifiers missing. | ||||||
2263 | /// This should never be used when type qualifiers are meaningful. | ||||||
2264 | const Type *getArrayElementTypeNoTypeQual() const; | ||||||
2265 | |||||||
2266 | /// If this is a pointer type, return the pointee type. | ||||||
2267 | /// If this is an array type, return the array element type. | ||||||
2268 | /// This should never be used when type qualifiers are meaningful. | ||||||
2269 | const Type *getPointeeOrArrayElementType() const; | ||||||
2270 | |||||||
2271 | /// If this is a pointer, ObjC object pointer, or block | ||||||
2272 | /// pointer, this returns the respective pointee. | ||||||
2273 | QualType getPointeeType() const; | ||||||
2274 | |||||||
2275 | /// Return the specified type with any "sugar" removed from the type, | ||||||
2276 | /// removing any typedefs, typeofs, etc., as well as any qualifiers. | ||||||
2277 | const Type *getUnqualifiedDesugaredType() const; | ||||||
2278 | |||||||
2279 | /// More type predicates useful for type checking/promotion | ||||||
2280 | bool isPromotableIntegerType() const; // C99 6.3.1.1p2 | ||||||
2281 | |||||||
2282 | /// Return true if this is an integer type that is | ||||||
2283 | /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], | ||||||
2284 | /// or an enum decl which has a signed representation. | ||||||
2285 | bool isSignedIntegerType() const; | ||||||
2286 | |||||||
2287 | /// Return true if this is an integer type that is | ||||||
2288 | /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], | ||||||
2289 | /// or an enum decl which has an unsigned representation. | ||||||
2290 | bool isUnsignedIntegerType() const; | ||||||
2291 | |||||||
2292 | /// Determines whether this is an integer type that is signed or an | ||||||
2293 | /// enumeration types whose underlying type is a signed integer type. | ||||||
2294 | bool isSignedIntegerOrEnumerationType() const; | ||||||
2295 | |||||||
2296 | /// Determines whether this is an integer type that is unsigned or an | ||||||
2297 | /// enumeration types whose underlying type is a unsigned integer type. | ||||||
2298 | bool isUnsignedIntegerOrEnumerationType() const; | ||||||
2299 | |||||||
2300 | /// Return true if this is a fixed point type according to | ||||||
2301 | /// ISO/IEC JTC1 SC22 WG14 N1169. | ||||||
2302 | bool isFixedPointType() const; | ||||||
2303 | |||||||
2304 | /// Return true if this is a fixed point or integer type. | ||||||
2305 | bool isFixedPointOrIntegerType() const; | ||||||
2306 | |||||||
2307 | /// Return true if this is a saturated fixed point type according to | ||||||
2308 | /// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned. | ||||||
2309 | bool isSaturatedFixedPointType() const; | ||||||
2310 | |||||||
2311 | /// Return true if this is a saturated fixed point type according to | ||||||
2312 | /// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned. | ||||||
2313 | bool isUnsaturatedFixedPointType() const; | ||||||
2314 | |||||||
2315 | /// Return true if this is a fixed point type that is signed according | ||||||
2316 | /// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated. | ||||||
2317 | bool isSignedFixedPointType() const; | ||||||
2318 | |||||||
2319 | /// Return true if this is a fixed point type that is unsigned according | ||||||
2320 | /// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated. | ||||||
2321 | bool isUnsignedFixedPointType() const; | ||||||
2322 | |||||||
2323 | /// Return true if this is not a variable sized type, | ||||||
2324 | /// according to the rules of C99 6.7.5p3. It is not legal to call this on | ||||||
2325 | /// incomplete types. | ||||||
2326 | bool isConstantSizeType() const; | ||||||
2327 | |||||||
2328 | /// Returns true if this type can be represented by some | ||||||
2329 | /// set of type specifiers. | ||||||
2330 | bool isSpecifierType() const; | ||||||
2331 | |||||||
2332 | /// Determine the linkage of this type. | ||||||
2333 | Linkage getLinkage() const; | ||||||
2334 | |||||||
2335 | /// Determine the visibility of this type. | ||||||
2336 | Visibility getVisibility() const { | ||||||
2337 | return getLinkageAndVisibility().getVisibility(); | ||||||
2338 | } | ||||||
2339 | |||||||
2340 | /// Return true if the visibility was explicitly set is the code. | ||||||
2341 | bool isVisibilityExplicit() const { | ||||||
2342 | return getLinkageAndVisibility().isVisibilityExplicit(); | ||||||
2343 | } | ||||||
2344 | |||||||
2345 | /// Determine the linkage and visibility of this type. | ||||||
2346 | LinkageInfo getLinkageAndVisibility() const; | ||||||
2347 | |||||||
2348 | /// True if the computed linkage is valid. Used for consistency | ||||||
2349 | /// checking. Should always return true. | ||||||
2350 | bool isLinkageValid() const; | ||||||
2351 | |||||||
2352 | /// Determine the nullability of the given type. | ||||||
2353 | /// | ||||||
2354 | /// Note that nullability is only captured as sugar within the type | ||||||
2355 | /// system, not as part of the canonical type, so nullability will | ||||||
2356 | /// be lost by canonicalization and desugaring. | ||||||
2357 | Optional<NullabilityKind> getNullability(const ASTContext &context) const; | ||||||
2358 | |||||||
2359 | /// Determine whether the given type can have a nullability | ||||||
2360 | /// specifier applied to it, i.e., if it is any kind of pointer type. | ||||||
2361 | /// | ||||||
2362 | /// \param ResultIfUnknown The value to return if we don't yet know whether | ||||||
2363 | /// this type can have nullability because it is dependent. | ||||||
2364 | bool canHaveNullability(bool ResultIfUnknown = true) const; | ||||||
2365 | |||||||
2366 | /// Retrieve the set of substitutions required when accessing a member | ||||||
2367 | /// of the Objective-C receiver type that is declared in the given context. | ||||||
2368 | /// | ||||||
2369 | /// \c *this is the type of the object we're operating on, e.g., the | ||||||
2370 | /// receiver for a message send or the base of a property access, and is | ||||||
2371 | /// expected to be of some object or object pointer type. | ||||||
2372 | /// | ||||||
2373 | /// \param dc The declaration context for which we are building up a | ||||||
2374 | /// substitution mapping, which should be an Objective-C class, extension, | ||||||
2375 | /// category, or method within. | ||||||
2376 | /// | ||||||
2377 | /// \returns an array of type arguments that can be substituted for | ||||||
2378 | /// the type parameters of the given declaration context in any type described | ||||||
2379 | /// within that context, or an empty optional to indicate that no | ||||||
2380 | /// substitution is required. | ||||||
2381 | Optional<ArrayRef<QualType>> | ||||||
2382 | getObjCSubstitutions(const DeclContext *dc) const; | ||||||
2383 | |||||||
2384 | /// Determines if this is an ObjC interface type that may accept type | ||||||
2385 | /// parameters. | ||||||
2386 | bool acceptsObjCTypeParams() const; | ||||||
2387 | |||||||
2388 | const char *getTypeClassName() const; | ||||||
2389 | |||||||
2390 | QualType getCanonicalTypeInternal() const { | ||||||
2391 | return CanonicalType; | ||||||
2392 | } | ||||||
2393 | |||||||
2394 | CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h | ||||||
2395 | void dump() const; | ||||||
2396 | void dump(llvm::raw_ostream &OS) const; | ||||||
2397 | }; | ||||||
2398 | |||||||
2399 | /// This will check for a TypedefType by removing any existing sugar | ||||||
2400 | /// until it reaches a TypedefType or a non-sugared type. | ||||||
2401 | template <> const TypedefType *Type::getAs() const; | ||||||
2402 | |||||||
2403 | /// This will check for a TemplateSpecializationType by removing any | ||||||
2404 | /// existing sugar until it reaches a TemplateSpecializationType or a | ||||||
2405 | /// non-sugared type. | ||||||
2406 | template <> const TemplateSpecializationType *Type::getAs() const; | ||||||
2407 | |||||||
2408 | /// This will check for an AttributedType by removing any existing sugar | ||||||
2409 | /// until it reaches an AttributedType or a non-sugared type. | ||||||
2410 | template <> const AttributedType *Type::getAs() const; | ||||||
2411 | |||||||
2412 | // We can do canonical leaf types faster, because we don't have to | ||||||
2413 | // worry about preserving child type decoration. | ||||||
2414 | #define TYPE(Class, Base) | ||||||
2415 | #define LEAF_TYPE(Class) \ | ||||||
2416 | template <> inline const Class##Type *Type::getAs() const { \ | ||||||
2417 | return dyn_cast<Class##Type>(CanonicalType); \ | ||||||
2418 | } \ | ||||||
2419 | template <> inline const Class##Type *Type::castAs() const { \ | ||||||
2420 | return cast<Class##Type>(CanonicalType); \ | ||||||
2421 | } | ||||||
2422 | #include "clang/AST/TypeNodes.inc" | ||||||
2423 | |||||||
2424 | /// This class is used for builtin types like 'int'. Builtin | ||||||
2425 | /// types are always canonical and have a literal name field. | ||||||
2426 | class BuiltinType : public Type { | ||||||
2427 | public: | ||||||
2428 | enum Kind { | ||||||
2429 | // OpenCL image types | ||||||
2430 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) Id, | ||||||
2431 | #include "clang/Basic/OpenCLImageTypes.def" | ||||||
2432 | // OpenCL extension types | ||||||
2433 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) Id, | ||||||
2434 | #include "clang/Basic/OpenCLExtensionTypes.def" | ||||||
2435 | // SVE Types | ||||||
2436 | #define SVE_TYPE(Name, Id, SingletonId) Id, | ||||||
2437 | #include "clang/Basic/AArch64SVEACLETypes.def" | ||||||
2438 | // All other builtin types | ||||||
2439 | #define BUILTIN_TYPE(Id, SingletonId) Id, | ||||||
2440 | #define LAST_BUILTIN_TYPE(Id) LastKind = Id | ||||||
2441 | #include "clang/AST/BuiltinTypes.def" | ||||||
2442 | }; | ||||||
2443 | |||||||
2444 | private: | ||||||
2445 | friend class ASTContext; // ASTContext creates these. | ||||||
2446 | |||||||
2447 | BuiltinType(Kind K) | ||||||
2448 | : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), | ||||||
2449 | /*InstantiationDependent=*/(K == Dependent), | ||||||
2450 | /*VariablyModified=*/false, | ||||||
2451 | /*Unexpanded parameter pack=*/false) { | ||||||
2452 | BuiltinTypeBits.Kind = K; | ||||||
2453 | } | ||||||
2454 | |||||||
2455 | public: | ||||||
2456 | Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } | ||||||
2457 | StringRef getName(const PrintingPolicy &Policy) const; | ||||||
2458 | |||||||
2459 | const char *getNameAsCString(const PrintingPolicy &Policy) const { | ||||||
2460 | // The StringRef is null-terminated. | ||||||
2461 | StringRef str = getName(Policy); | ||||||
2462 | assert(!str.empty() && str.data()[str.size()] == '\0')((!str.empty() && str.data()[str.size()] == '\0') ? static_cast <void> (0) : __assert_fail ("!str.empty() && str.data()[str.size()] == '\\0'" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 2462, __PRETTY_FUNCTION__)); | ||||||
2463 | return str.data(); | ||||||
2464 | } | ||||||
2465 | |||||||
2466 | bool isSugared() const { return false; } | ||||||
2467 | QualType desugar() const { return QualType(this, 0); } | ||||||
2468 | |||||||
2469 | bool isInteger() const { | ||||||
2470 | return getKind() >= Bool && getKind() <= Int128; | ||||||
2471 | } | ||||||
2472 | |||||||
2473 | bool isSignedInteger() const { | ||||||
2474 | return getKind() >= Char_S && getKind() <= Int128; | ||||||
2475 | } | ||||||
2476 | |||||||
2477 | bool isUnsignedInteger() const { | ||||||
2478 | return getKind() >= Bool && getKind() <= UInt128; | ||||||
2479 | } | ||||||
2480 | |||||||
2481 | bool isFloatingPoint() const { | ||||||
2482 | return getKind() >= Half && getKind() <= Float128; | ||||||
2483 | } | ||||||
2484 | |||||||
2485 | /// Determines whether the given kind corresponds to a placeholder type. | ||||||
2486 | static bool isPlaceholderTypeKind(Kind K) { | ||||||
2487 | return K >= Overload; | ||||||
2488 | } | ||||||
2489 | |||||||
2490 | /// Determines whether this type is a placeholder type, i.e. a type | ||||||
2491 | /// which cannot appear in arbitrary positions in a fully-formed | ||||||
2492 | /// expression. | ||||||
2493 | bool isPlaceholderType() const { | ||||||
2494 | return isPlaceholderTypeKind(getKind()); | ||||||
2495 | } | ||||||
2496 | |||||||
2497 | /// Determines whether this type is a placeholder type other than | ||||||
2498 | /// Overload. Most placeholder types require only syntactic | ||||||
2499 | /// information about their context in order to be resolved (e.g. | ||||||
2500 | /// whether it is a call expression), which means they can (and | ||||||
2501 | /// should) be resolved in an earlier "phase" of analysis. | ||||||
2502 | /// Overload expressions sometimes pick up further information | ||||||
2503 | /// from their context, like whether the context expects a | ||||||
2504 | /// specific function-pointer type, and so frequently need | ||||||
2505 | /// special treatment. | ||||||
2506 | bool isNonOverloadPlaceholderType() const { | ||||||
2507 | return getKind() > Overload; | ||||||
2508 | } | ||||||
2509 | |||||||
2510 | static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } | ||||||
2511 | }; | ||||||
2512 | |||||||
2513 | /// Complex values, per C99 6.2.5p11. This supports the C99 complex | ||||||
2514 | /// types (_Complex float etc) as well as the GCC integer complex extensions. | ||||||
2515 | class ComplexType : public Type, public llvm::FoldingSetNode { | ||||||
2516 | friend class ASTContext; // ASTContext creates these. | ||||||
2517 | |||||||
2518 | QualType ElementType; | ||||||
2519 | |||||||
2520 | ComplexType(QualType Element, QualType CanonicalPtr) | ||||||
2521 | : Type(Complex, CanonicalPtr, Element->isDependentType(), | ||||||
2522 | Element->isInstantiationDependentType(), | ||||||
2523 | Element->isVariablyModifiedType(), | ||||||
2524 | Element->containsUnexpandedParameterPack()), | ||||||
2525 | ElementType(Element) {} | ||||||
2526 | |||||||
2527 | public: | ||||||
2528 | QualType getElementType() const { return ElementType; } | ||||||
2529 | |||||||
2530 | bool isSugared() const { return false; } | ||||||
2531 | QualType desugar() const { return QualType(this, 0); } | ||||||
2532 | |||||||
2533 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
2534 | Profile(ID, getElementType()); | ||||||
2535 | } | ||||||
2536 | |||||||
2537 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { | ||||||
2538 | ID.AddPointer(Element.getAsOpaquePtr()); | ||||||
2539 | } | ||||||
2540 | |||||||
2541 | static bool classof(const Type *T) { return T->getTypeClass() == Complex; } | ||||||
2542 | }; | ||||||
2543 | |||||||
2544 | /// Sugar for parentheses used when specifying types. | ||||||
2545 | class ParenType : public Type, public llvm::FoldingSetNode { | ||||||
2546 | friend class ASTContext; // ASTContext creates these. | ||||||
2547 | |||||||
2548 | QualType Inner; | ||||||
2549 | |||||||
2550 | ParenType(QualType InnerType, QualType CanonType) | ||||||
2551 | : Type(Paren, CanonType, InnerType->isDependentType(), | ||||||
2552 | InnerType->isInstantiationDependentType(), | ||||||
2553 | InnerType->isVariablyModifiedType(), | ||||||
2554 | InnerType->containsUnexpandedParameterPack()), | ||||||
2555 | Inner(InnerType) {} | ||||||
2556 | |||||||
2557 | public: | ||||||
2558 | QualType getInnerType() const { return Inner; } | ||||||
2559 | |||||||
2560 | bool isSugared() const { return true; } | ||||||
2561 | QualType desugar() const { return getInnerType(); } | ||||||
2562 | |||||||
2563 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
2564 | Profile(ID, getInnerType()); | ||||||
2565 | } | ||||||
2566 | |||||||
2567 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { | ||||||
2568 | Inner.Profile(ID); | ||||||
2569 | } | ||||||
2570 | |||||||
2571 | static bool classof(const Type *T) { return T->getTypeClass() == Paren; } | ||||||
2572 | }; | ||||||
2573 | |||||||
2574 | /// PointerType - C99 6.7.5.1 - Pointer Declarators. | ||||||
2575 | class PointerType : public Type, public llvm::FoldingSetNode { | ||||||
2576 | friend class ASTContext; // ASTContext creates these. | ||||||
2577 | |||||||
2578 | QualType PointeeType; | ||||||
2579 | |||||||
2580 | PointerType(QualType Pointee, QualType CanonicalPtr) | ||||||
2581 | : Type(Pointer, CanonicalPtr, Pointee->isDependentType(), | ||||||
2582 | Pointee->isInstantiationDependentType(), | ||||||
2583 | Pointee->isVariablyModifiedType(), | ||||||
2584 | Pointee->containsUnexpandedParameterPack()), | ||||||
2585 | PointeeType(Pointee) {} | ||||||
2586 | |||||||
2587 | public: | ||||||
2588 | QualType getPointeeType() const { return PointeeType; } | ||||||
2589 | |||||||
2590 | /// Returns true if address spaces of pointers overlap. | ||||||
2591 | /// OpenCL v2.0 defines conversion rules for pointers to different | ||||||
2592 | /// address spaces (OpenCLC v2.0 s6.5.5) and notion of overlapping | ||||||
2593 | /// address spaces. | ||||||
2594 | /// CL1.1 or CL1.2: | ||||||
2595 | /// address spaces overlap iff they are they same. | ||||||
2596 | /// CL2.0 adds: | ||||||
2597 | /// __generic overlaps with any address space except for __constant. | ||||||
2598 | bool isAddressSpaceOverlapping(const PointerType &other) const { | ||||||
2599 | Qualifiers thisQuals = PointeeType.getQualifiers(); | ||||||
2600 | Qualifiers otherQuals = other.getPointeeType().getQualifiers(); | ||||||
2601 | // Address spaces overlap if at least one of them is a superset of another | ||||||
2602 | return thisQuals.isAddressSpaceSupersetOf(otherQuals) || | ||||||
2603 | otherQuals.isAddressSpaceSupersetOf(thisQuals); | ||||||
2604 | } | ||||||
2605 | |||||||
2606 | bool isSugared() const { return false; } | ||||||
2607 | QualType desugar() const { return QualType(this, 0); } | ||||||
2608 | |||||||
2609 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
2610 | Profile(ID, getPointeeType()); | ||||||
2611 | } | ||||||
2612 | |||||||
2613 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { | ||||||
2614 | ID.AddPointer(Pointee.getAsOpaquePtr()); | ||||||
2615 | } | ||||||
2616 | |||||||
2617 | static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } | ||||||
2618 | }; | ||||||
2619 | |||||||
2620 | /// Represents a type which was implicitly adjusted by the semantic | ||||||
2621 | /// engine for arbitrary reasons. For example, array and function types can | ||||||
2622 | /// decay, and function types can have their calling conventions adjusted. | ||||||
2623 | class AdjustedType : public Type, public llvm::FoldingSetNode { | ||||||
2624 | QualType OriginalTy; | ||||||
2625 | QualType AdjustedTy; | ||||||
2626 | |||||||
2627 | protected: | ||||||
2628 | friend class ASTContext; // ASTContext creates these. | ||||||
2629 | |||||||
2630 | AdjustedType(TypeClass TC, QualType OriginalTy, QualType AdjustedTy, | ||||||
2631 | QualType CanonicalPtr) | ||||||
2632 | : Type(TC, CanonicalPtr, OriginalTy->isDependentType(), | ||||||
2633 | OriginalTy->isInstantiationDependentType(), | ||||||
2634 | OriginalTy->isVariablyModifiedType(), | ||||||
2635 | OriginalTy->containsUnexpandedParameterPack()), | ||||||
2636 | OriginalTy(OriginalTy), AdjustedTy(AdjustedTy) {} | ||||||
2637 | |||||||
2638 | public: | ||||||
2639 | QualType getOriginalType() const { return OriginalTy; } | ||||||
2640 | QualType getAdjustedType() const { return AdjustedTy; } | ||||||
2641 | |||||||
2642 | bool isSugared() const { return true; } | ||||||
2643 | QualType desugar() const { return AdjustedTy; } | ||||||
2644 | |||||||
2645 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
2646 | Profile(ID, OriginalTy, AdjustedTy); | ||||||
2647 | } | ||||||
2648 | |||||||
2649 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Orig, QualType New) { | ||||||
2650 | ID.AddPointer(Orig.getAsOpaquePtr()); | ||||||
2651 | ID.AddPointer(New.getAsOpaquePtr()); | ||||||
2652 | } | ||||||
2653 | |||||||
2654 | static bool classof(const Type *T) { | ||||||
2655 | return T->getTypeClass() == Adjusted || T->getTypeClass() == Decayed; | ||||||
2656 | } | ||||||
2657 | }; | ||||||
2658 | |||||||
2659 | /// Represents a pointer type decayed from an array or function type. | ||||||
2660 | class DecayedType : public AdjustedType { | ||||||
2661 | friend class ASTContext; // ASTContext creates these. | ||||||
2662 | |||||||
2663 | inline | ||||||
2664 | DecayedType(QualType OriginalType, QualType Decayed, QualType Canonical); | ||||||
2665 | |||||||
2666 | public: | ||||||
2667 | QualType getDecayedType() const { return getAdjustedType(); } | ||||||
2668 | |||||||
2669 | inline QualType getPointeeType() const; | ||||||
2670 | |||||||
2671 | static bool classof(const Type *T) { return T->getTypeClass() == Decayed; } | ||||||
2672 | }; | ||||||
2673 | |||||||
2674 | /// Pointer to a block type. | ||||||
2675 | /// This type is to represent types syntactically represented as | ||||||
2676 | /// "void (^)(int)", etc. Pointee is required to always be a function type. | ||||||
2677 | class BlockPointerType : public Type, public llvm::FoldingSetNode { | ||||||
2678 | friend class ASTContext; // ASTContext creates these. | ||||||
2679 | |||||||
2680 | // Block is some kind of pointer type | ||||||
2681 | QualType PointeeType; | ||||||
2682 | |||||||
2683 | BlockPointerType(QualType Pointee, QualType CanonicalCls) | ||||||
2684 | : Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), | ||||||
2685 | Pointee->isInstantiationDependentType(), | ||||||
2686 | Pointee->isVariablyModifiedType(), | ||||||
2687 | Pointee->containsUnexpandedParameterPack()), | ||||||
2688 | PointeeType(Pointee) {} | ||||||
2689 | |||||||
2690 | public: | ||||||
2691 | // Get the pointee type. Pointee is required to always be a function type. | ||||||
2692 | QualType getPointeeType() const { return PointeeType; } | ||||||
2693 | |||||||
2694 | bool isSugared() const { return false; } | ||||||
2695 | QualType desugar() const { return QualType(this, 0); } | ||||||
2696 | |||||||
2697 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
2698 | Profile(ID, getPointeeType()); | ||||||
2699 | } | ||||||
2700 | |||||||
2701 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { | ||||||
2702 | ID.AddPointer(Pointee.getAsOpaquePtr()); | ||||||
2703 | } | ||||||
2704 | |||||||
2705 | static bool classof(const Type *T) { | ||||||
2706 | return T->getTypeClass() == BlockPointer; | ||||||
2707 | } | ||||||
2708 | }; | ||||||
2709 | |||||||
2710 | /// Base for LValueReferenceType and RValueReferenceType | ||||||
2711 | class ReferenceType : public Type, public llvm::FoldingSetNode { | ||||||
2712 | QualType PointeeType; | ||||||
2713 | |||||||
2714 | protected: | ||||||
2715 | ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, | ||||||
2716 | bool SpelledAsLValue) | ||||||
2717 | : Type(tc, CanonicalRef, Referencee->isDependentType(), | ||||||
2718 | Referencee->isInstantiationDependentType(), | ||||||
2719 | Referencee->isVariablyModifiedType(), | ||||||
2720 | Referencee->containsUnexpandedParameterPack()), | ||||||
2721 | PointeeType(Referencee) { | ||||||
2722 | ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; | ||||||
2723 | ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); | ||||||
2724 | } | ||||||
2725 | |||||||
2726 | public: | ||||||
2727 | bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } | ||||||
2728 | bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } | ||||||
2729 | |||||||
2730 | QualType getPointeeTypeAsWritten() const { return PointeeType; } | ||||||
2731 | |||||||
2732 | QualType getPointeeType() const { | ||||||
2733 | // FIXME: this might strip inner qualifiers; okay? | ||||||
2734 | const ReferenceType *T = this; | ||||||
2735 | while (T->isInnerRef()) | ||||||
2736 | T = T->PointeeType->castAs<ReferenceType>(); | ||||||
2737 | return T->PointeeType; | ||||||
2738 | } | ||||||
2739 | |||||||
2740 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
2741 | Profile(ID, PointeeType, isSpelledAsLValue()); | ||||||
2742 | } | ||||||
2743 | |||||||
2744 | static void Profile(llvm::FoldingSetNodeID &ID, | ||||||
2745 | QualType Referencee, | ||||||
2746 | bool SpelledAsLValue) { | ||||||
2747 | ID.AddPointer(Referencee.getAsOpaquePtr()); | ||||||
2748 | ID.AddBoolean(SpelledAsLValue); | ||||||
2749 | } | ||||||
2750 | |||||||
2751 | static bool classof(const Type *T) { | ||||||
2752 | return T->getTypeClass() == LValueReference || | ||||||
2753 | T->getTypeClass() == RValueReference; | ||||||
2754 | } | ||||||
2755 | }; | ||||||
2756 | |||||||
2757 | /// An lvalue reference type, per C++11 [dcl.ref]. | ||||||
2758 | class LValueReferenceType : public ReferenceType { | ||||||
2759 | friend class ASTContext; // ASTContext creates these | ||||||
2760 | |||||||
2761 | LValueReferenceType(QualType Referencee, QualType CanonicalRef, | ||||||
2762 | bool SpelledAsLValue) | ||||||
2763 | : ReferenceType(LValueReference, Referencee, CanonicalRef, | ||||||
2764 | SpelledAsLValue) {} | ||||||
2765 | |||||||
2766 | public: | ||||||
2767 | bool isSugared() const { return false; } | ||||||
2768 | QualType desugar() const { return QualType(this, 0); } | ||||||
2769 | |||||||
2770 | static bool classof(const Type *T) { | ||||||
2771 | return T->getTypeClass() == LValueReference; | ||||||
2772 | } | ||||||
2773 | }; | ||||||
2774 | |||||||
2775 | /// An rvalue reference type, per C++11 [dcl.ref]. | ||||||
2776 | class RValueReferenceType : public ReferenceType { | ||||||
2777 | friend class ASTContext; // ASTContext creates these | ||||||
2778 | |||||||
2779 | RValueReferenceType(QualType Referencee, QualType CanonicalRef) | ||||||
2780 | : ReferenceType(RValueReference, Referencee, CanonicalRef, false) {} | ||||||
2781 | |||||||
2782 | public: | ||||||
2783 | bool isSugared() const { return false; } | ||||||
2784 | QualType desugar() const { return QualType(this, 0); } | ||||||
2785 | |||||||
2786 | static bool classof(const Type *T) { | ||||||
2787 | return T->getTypeClass() == RValueReference; | ||||||
2788 | } | ||||||
2789 | }; | ||||||
2790 | |||||||
2791 | /// A pointer to member type per C++ 8.3.3 - Pointers to members. | ||||||
2792 | /// | ||||||
2793 | /// This includes both pointers to data members and pointer to member functions. | ||||||
2794 | class MemberPointerType : public Type, public llvm::FoldingSetNode { | ||||||
2795 | friend class ASTContext; // ASTContext creates these. | ||||||
2796 | |||||||
2797 | QualType PointeeType; | ||||||
2798 | |||||||
2799 | /// The class of which the pointee is a member. Must ultimately be a | ||||||
2800 | /// RecordType, but could be a typedef or a template parameter too. | ||||||
2801 | const Type *Class; | ||||||
2802 | |||||||
2803 | MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) | ||||||
2804 | : Type(MemberPointer, CanonicalPtr, | ||||||
2805 | Cls->isDependentType() || Pointee->isDependentType(), | ||||||
2806 | (Cls->isInstantiationDependentType() || | ||||||
2807 | Pointee->isInstantiationDependentType()), | ||||||
2808 | Pointee->isVariablyModifiedType(), | ||||||
2809 | (Cls->containsUnexpandedParameterPack() || | ||||||
2810 | Pointee->containsUnexpandedParameterPack())), | ||||||
2811 | PointeeType(Pointee), Class(Cls) {} | ||||||
2812 | |||||||
2813 | public: | ||||||
2814 | QualType getPointeeType() const { return PointeeType; } | ||||||
2815 | |||||||
2816 | /// Returns true if the member type (i.e. the pointee type) is a | ||||||
2817 | /// function type rather than a data-member type. | ||||||
2818 | bool isMemberFunctionPointer() const { | ||||||
2819 | return PointeeType->isFunctionProtoType(); | ||||||
2820 | } | ||||||
2821 | |||||||
2822 | /// Returns true if the member type (i.e. the pointee type) is a | ||||||
2823 | /// data type rather than a function type. | ||||||
2824 | bool isMemberDataPointer() const { | ||||||
2825 | return !PointeeType->isFunctionProtoType(); | ||||||
2826 | } | ||||||
2827 | |||||||
2828 | const Type *getClass() const { return Class; } | ||||||
2829 | CXXRecordDecl *getMostRecentCXXRecordDecl() const; | ||||||
2830 | |||||||
2831 | bool isSugared() const { return false; } | ||||||
2832 | QualType desugar() const { return QualType(this, 0); } | ||||||
2833 | |||||||
2834 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
2835 | Profile(ID, getPointeeType(), getClass()); | ||||||
2836 | } | ||||||
2837 | |||||||
2838 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, | ||||||
2839 | const Type *Class) { | ||||||
2840 | ID.AddPointer(Pointee.getAsOpaquePtr()); | ||||||
2841 | ID.AddPointer(Class); | ||||||
2842 | } | ||||||
2843 | |||||||
2844 | static bool classof(const Type *T) { | ||||||
2845 | return T->getTypeClass() == MemberPointer; | ||||||
2846 | } | ||||||
2847 | }; | ||||||
2848 | |||||||
2849 | /// Represents an array type, per C99 6.7.5.2 - Array Declarators. | ||||||
2850 | class ArrayType : public Type, public llvm::FoldingSetNode { | ||||||
2851 | public: | ||||||
2852 | /// Capture whether this is a normal array (e.g. int X[4]) | ||||||
2853 | /// an array with a static size (e.g. int X[static 4]), or an array | ||||||
2854 | /// with a star size (e.g. int X[*]). | ||||||
2855 | /// 'static' is only allowed on function parameters. | ||||||
2856 | enum ArraySizeModifier { | ||||||
2857 | Normal, Static, Star | ||||||
2858 | }; | ||||||
2859 | |||||||
2860 | private: | ||||||
2861 | /// The element type of the array. | ||||||
2862 | QualType ElementType; | ||||||
2863 | |||||||
2864 | protected: | ||||||
2865 | friend class ASTContext; // ASTContext creates these. | ||||||
2866 | |||||||
2867 | // C++ [temp.dep.type]p1: | ||||||
2868 | // A type is dependent if it is... | ||||||
2869 | // - an array type constructed from any dependent type or whose | ||||||
2870 | // size is specified by a constant expression that is | ||||||
2871 | // value-dependent, | ||||||
2872 | ArrayType(TypeClass tc, QualType et, QualType can, | ||||||
2873 | ArraySizeModifier sm, unsigned tq, | ||||||
2874 | bool ContainsUnexpandedParameterPack) | ||||||
2875 | : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, | ||||||
2876 | et->isInstantiationDependentType() || tc == DependentSizedArray, | ||||||
2877 | (tc == VariableArray || et->isVariablyModifiedType()), | ||||||
2878 | ContainsUnexpandedParameterPack), | ||||||
2879 | ElementType(et) { | ||||||
2880 | ArrayTypeBits.IndexTypeQuals = tq; | ||||||
2881 | ArrayTypeBits.SizeModifier = sm; | ||||||
2882 | } | ||||||
2883 | |||||||
2884 | public: | ||||||
2885 | QualType getElementType() const { return ElementType; } | ||||||
2886 | |||||||
2887 | ArraySizeModifier getSizeModifier() const { | ||||||
2888 | return ArraySizeModifier(ArrayTypeBits.SizeModifier); | ||||||
2889 | } | ||||||
2890 | |||||||
2891 | Qualifiers getIndexTypeQualifiers() const { | ||||||
2892 | return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); | ||||||
2893 | } | ||||||
2894 | |||||||
2895 | unsigned getIndexTypeCVRQualifiers() const { | ||||||
2896 | return ArrayTypeBits.IndexTypeQuals; | ||||||
2897 | } | ||||||
2898 | |||||||
2899 | static bool classof(const Type *T) { | ||||||
2900 | return T->getTypeClass() == ConstantArray || | ||||||
2901 | T->getTypeClass() == VariableArray || | ||||||
2902 | T->getTypeClass() == IncompleteArray || | ||||||
2903 | T->getTypeClass() == DependentSizedArray; | ||||||
2904 | } | ||||||
2905 | }; | ||||||
2906 | |||||||
2907 | /// Represents the canonical version of C arrays with a specified constant size. | ||||||
2908 | /// For example, the canonical type for 'int A[4 + 4*100]' is a | ||||||
2909 | /// ConstantArrayType where the element type is 'int' and the size is 404. | ||||||
2910 | class ConstantArrayType : public ArrayType { | ||||||
2911 | llvm::APInt Size; // Allows us to unique the type. | ||||||
2912 | |||||||
2913 | ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, | ||||||
2914 | ArraySizeModifier sm, unsigned tq) | ||||||
2915 | : ArrayType(ConstantArray, et, can, sm, tq, | ||||||
2916 | et->containsUnexpandedParameterPack()), | ||||||
2917 | Size(size) {} | ||||||
2918 | |||||||
2919 | protected: | ||||||
2920 | friend class ASTContext; // ASTContext creates these. | ||||||
2921 | |||||||
2922 | ConstantArrayType(TypeClass tc, QualType et, QualType can, | ||||||
2923 | const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) | ||||||
2924 | : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), | ||||||
2925 | Size(size) {} | ||||||
2926 | |||||||
2927 | public: | ||||||
2928 | const llvm::APInt &getSize() const { return Size; } | ||||||
2929 | bool isSugared() const { return false; } | ||||||
2930 | QualType desugar() const { return QualType(this, 0); } | ||||||
2931 | |||||||
2932 | /// Determine the number of bits required to address a member of | ||||||
2933 | // an array with the given element type and number of elements. | ||||||
2934 | static unsigned getNumAddressingBits(const ASTContext &Context, | ||||||
2935 | QualType ElementType, | ||||||
2936 | const llvm::APInt &NumElements); | ||||||
2937 | |||||||
2938 | /// Determine the maximum number of active bits that an array's size | ||||||
2939 | /// can require, which limits the maximum size of the array. | ||||||
2940 | static unsigned getMaxSizeBits(const ASTContext &Context); | ||||||
2941 | |||||||
2942 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
2943 | Profile(ID, getElementType(), getSize(), | ||||||
2944 | getSizeModifier(), getIndexTypeCVRQualifiers()); | ||||||
2945 | } | ||||||
2946 | |||||||
2947 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, | ||||||
2948 | const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, | ||||||
2949 | unsigned TypeQuals) { | ||||||
2950 | ID.AddPointer(ET.getAsOpaquePtr()); | ||||||
2951 | ID.AddInteger(ArraySize.getZExtValue()); | ||||||
2952 | ID.AddInteger(SizeMod); | ||||||
2953 | ID.AddInteger(TypeQuals); | ||||||
2954 | } | ||||||
2955 | |||||||
2956 | static bool classof(const Type *T) { | ||||||
2957 | return T->getTypeClass() == ConstantArray; | ||||||
2958 | } | ||||||
2959 | }; | ||||||
2960 | |||||||
2961 | /// Represents a C array with an unspecified size. For example 'int A[]' has | ||||||
2962 | /// an IncompleteArrayType where the element type is 'int' and the size is | ||||||
2963 | /// unspecified. | ||||||
2964 | class IncompleteArrayType : public ArrayType { | ||||||
2965 | friend class ASTContext; // ASTContext creates these. | ||||||
2966 | |||||||
2967 | IncompleteArrayType(QualType et, QualType can, | ||||||
2968 | ArraySizeModifier sm, unsigned tq) | ||||||
2969 | : ArrayType(IncompleteArray, et, can, sm, tq, | ||||||
2970 | et->containsUnexpandedParameterPack()) {} | ||||||
2971 | |||||||
2972 | public: | ||||||
2973 | friend class StmtIteratorBase; | ||||||
2974 | |||||||
2975 | bool isSugared() const { return false; } | ||||||
2976 | QualType desugar() const { return QualType(this, 0); } | ||||||
2977 | |||||||
2978 | static bool classof(const Type *T) { | ||||||
2979 | return T->getTypeClass() == IncompleteArray; | ||||||
2980 | } | ||||||
2981 | |||||||
2982 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
2983 | Profile(ID, getElementType(), getSizeModifier(), | ||||||
2984 | getIndexTypeCVRQualifiers()); | ||||||
2985 | } | ||||||
2986 | |||||||
2987 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, | ||||||
2988 | ArraySizeModifier SizeMod, unsigned TypeQuals) { | ||||||
2989 | ID.AddPointer(ET.getAsOpaquePtr()); | ||||||
2990 | ID.AddInteger(SizeMod); | ||||||
2991 | ID.AddInteger(TypeQuals); | ||||||
2992 | } | ||||||
2993 | }; | ||||||
2994 | |||||||
2995 | /// Represents a C array with a specified size that is not an | ||||||
2996 | /// integer-constant-expression. For example, 'int s[x+foo()]'. | ||||||
2997 | /// Since the size expression is an arbitrary expression, we store it as such. | ||||||
2998 | /// | ||||||
2999 | /// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and | ||||||
3000 | /// should not be: two lexically equivalent variable array types could mean | ||||||
3001 | /// different things, for example, these variables do not have the same type | ||||||
3002 | /// dynamically: | ||||||
3003 | /// | ||||||
3004 | /// void foo(int x) { | ||||||
3005 | /// int Y[x]; | ||||||
3006 | /// ++x; | ||||||
3007 | /// int Z[x]; | ||||||
3008 | /// } | ||||||
3009 | class VariableArrayType : public ArrayType { | ||||||
3010 | friend class ASTContext; // ASTContext creates these. | ||||||
3011 | |||||||
3012 | /// An assignment-expression. VLA's are only permitted within | ||||||
3013 | /// a function block. | ||||||
3014 | Stmt *SizeExpr; | ||||||
3015 | |||||||
3016 | /// The range spanned by the left and right array brackets. | ||||||
3017 | SourceRange Brackets; | ||||||
3018 | |||||||
3019 | VariableArrayType(QualType et, QualType can, Expr *e, | ||||||
3020 | ArraySizeModifier sm, unsigned tq, | ||||||
3021 | SourceRange brackets) | ||||||
3022 | : ArrayType(VariableArray, et, can, sm, tq, | ||||||
3023 | et->containsUnexpandedParameterPack()), | ||||||
3024 | SizeExpr((Stmt*) e), Brackets(brackets) {} | ||||||
3025 | |||||||
3026 | public: | ||||||
3027 | friend class StmtIteratorBase; | ||||||
3028 | |||||||
3029 | Expr *getSizeExpr() const { | ||||||
3030 | // We use C-style casts instead of cast<> here because we do not wish | ||||||
3031 | // to have a dependency of Type.h on Stmt.h/Expr.h. | ||||||
3032 | return (Expr*) SizeExpr; | ||||||
3033 | } | ||||||
3034 | |||||||
3035 | SourceRange getBracketsRange() const { return Brackets; } | ||||||
3036 | SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } | ||||||
3037 | SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } | ||||||
3038 | |||||||
3039 | bool isSugared() const { return false; } | ||||||
3040 | QualType desugar() const { return QualType(this, 0); } | ||||||
3041 | |||||||
3042 | static bool classof(const Type *T) { | ||||||
3043 | return T->getTypeClass() == VariableArray; | ||||||
3044 | } | ||||||
3045 | |||||||
3046 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
3047 | llvm_unreachable("Cannot unique VariableArrayTypes.")::llvm::llvm_unreachable_internal("Cannot unique VariableArrayTypes." , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 3047); | ||||||
3048 | } | ||||||
3049 | }; | ||||||
3050 | |||||||
3051 | /// Represents an array type in C++ whose size is a value-dependent expression. | ||||||
3052 | /// | ||||||
3053 | /// For example: | ||||||
3054 | /// \code | ||||||
3055 | /// template<typename T, int Size> | ||||||
3056 | /// class array { | ||||||
3057 | /// T data[Size]; | ||||||
3058 | /// }; | ||||||
3059 | /// \endcode | ||||||
3060 | /// | ||||||
3061 | /// For these types, we won't actually know what the array bound is | ||||||
3062 | /// until template instantiation occurs, at which point this will | ||||||
3063 | /// become either a ConstantArrayType or a VariableArrayType. | ||||||
3064 | class DependentSizedArrayType : public ArrayType { | ||||||
3065 | friend class ASTContext; // ASTContext creates these. | ||||||
3066 | |||||||
3067 | const ASTContext &Context; | ||||||
3068 | |||||||
3069 | /// An assignment expression that will instantiate to the | ||||||
3070 | /// size of the array. | ||||||
3071 | /// | ||||||
3072 | /// The expression itself might be null, in which case the array | ||||||
3073 | /// type will have its size deduced from an initializer. | ||||||
3074 | Stmt *SizeExpr; | ||||||
3075 | |||||||
3076 | /// The range spanned by the left and right array brackets. | ||||||
3077 | SourceRange Brackets; | ||||||
3078 | |||||||
3079 | DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, | ||||||
3080 | Expr *e, ArraySizeModifier sm, unsigned tq, | ||||||
3081 | SourceRange brackets); | ||||||
3082 | |||||||
3083 | public: | ||||||
3084 | friend class StmtIteratorBase; | ||||||
3085 | |||||||
3086 | Expr *getSizeExpr() const { | ||||||
3087 | // We use C-style casts instead of cast<> here because we do not wish | ||||||
3088 | // to have a dependency of Type.h on Stmt.h/Expr.h. | ||||||
3089 | return (Expr*) SizeExpr; | ||||||
3090 | } | ||||||
3091 | |||||||
3092 | SourceRange getBracketsRange() const { return Brackets; } | ||||||
3093 | SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } | ||||||
3094 | SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } | ||||||
3095 | |||||||
3096 | bool isSugared() const { return false; } | ||||||
3097 | QualType desugar() const { return QualType(this, 0); } | ||||||
3098 | |||||||
3099 | static bool classof(const Type *T) { | ||||||
3100 | return T->getTypeClass() == DependentSizedArray; | ||||||
3101 | } | ||||||
3102 | |||||||
3103 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
3104 | Profile(ID, Context, getElementType(), | ||||||
3105 | getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); | ||||||
3106 | } | ||||||
3107 | |||||||
3108 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, | ||||||
3109 | QualType ET, ArraySizeModifier SizeMod, | ||||||
3110 | unsigned TypeQuals, Expr *E); | ||||||
3111 | }; | ||||||
3112 | |||||||
3113 | /// Represents an extended address space qualifier where the input address space | ||||||
3114 | /// value is dependent. Non-dependent address spaces are not represented with a | ||||||
3115 | /// special Type subclass; they are stored on an ExtQuals node as part of a QualType. | ||||||
3116 | /// | ||||||
3117 | /// For example: | ||||||
3118 | /// \code | ||||||
3119 | /// template<typename T, int AddrSpace> | ||||||
3120 | /// class AddressSpace { | ||||||
3121 | /// typedef T __attribute__((address_space(AddrSpace))) type; | ||||||
3122 | /// } | ||||||
3123 | /// \endcode | ||||||
3124 | class DependentAddressSpaceType : public Type, public llvm::FoldingSetNode { | ||||||
3125 | friend class ASTContext; | ||||||
3126 | |||||||
3127 | const ASTContext &Context; | ||||||
3128 | Expr *AddrSpaceExpr; | ||||||
3129 | QualType PointeeType; | ||||||
3130 | SourceLocation loc; | ||||||
3131 | |||||||
3132 | DependentAddressSpaceType(const ASTContext &Context, QualType PointeeType, | ||||||
3133 | QualType can, Expr *AddrSpaceExpr, | ||||||
3134 | SourceLocation loc); | ||||||
3135 | |||||||
3136 | public: | ||||||
3137 | Expr *getAddrSpaceExpr() const { return AddrSpaceExpr; } | ||||||
3138 | QualType getPointeeType() const { return PointeeType; } | ||||||
3139 | SourceLocation getAttributeLoc() const { return loc; } | ||||||
3140 | |||||||
3141 | bool isSugared() const { return false; } | ||||||
3142 | QualType desugar() const { return QualType(this, 0); } | ||||||
3143 | |||||||
3144 | static bool classof(const Type *T) { | ||||||
3145 | return T->getTypeClass() == DependentAddressSpace; | ||||||
3146 | } | ||||||
3147 | |||||||
3148 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
3149 | Profile(ID, Context, getPointeeType(), getAddrSpaceExpr()); | ||||||
3150 | } | ||||||
3151 | |||||||
3152 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, | ||||||
3153 | QualType PointeeType, Expr *AddrSpaceExpr); | ||||||
3154 | }; | ||||||
3155 | |||||||
3156 | /// Represents an extended vector type where either the type or size is | ||||||
3157 | /// dependent. | ||||||
3158 | /// | ||||||
3159 | /// For example: | ||||||
3160 | /// \code | ||||||
3161 | /// template<typename T, int Size> | ||||||
3162 | /// class vector { | ||||||
3163 | /// typedef T __attribute__((ext_vector_type(Size))) type; | ||||||
3164 | /// } | ||||||
3165 | /// \endcode | ||||||
3166 | class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { | ||||||
3167 | friend class ASTContext; | ||||||
3168 | |||||||
3169 | const ASTContext &Context; | ||||||
3170 | Expr *SizeExpr; | ||||||
3171 | |||||||
3172 | /// The element type of the array. | ||||||
3173 | QualType ElementType; | ||||||
3174 | |||||||
3175 | SourceLocation loc; | ||||||
3176 | |||||||
3177 | DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, | ||||||
3178 | QualType can, Expr *SizeExpr, SourceLocation loc); | ||||||
3179 | |||||||
3180 | public: | ||||||
3181 | Expr *getSizeExpr() const { return SizeExpr; } | ||||||
3182 | QualType getElementType() const { return ElementType; } | ||||||
3183 | SourceLocation getAttributeLoc() const { return loc; } | ||||||
3184 | |||||||
3185 | bool isSugared() const { return false; } | ||||||
3186 | QualType desugar() const { return QualType(this, 0); } | ||||||
3187 | |||||||
3188 | static bool classof(const Type *T) { | ||||||
3189 | return T->getTypeClass() == DependentSizedExtVector; | ||||||
3190 | } | ||||||
3191 | |||||||
3192 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
3193 | Profile(ID, Context, getElementType(), getSizeExpr()); | ||||||
3194 | } | ||||||
3195 | |||||||
3196 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, | ||||||
3197 | QualType ElementType, Expr *SizeExpr); | ||||||
3198 | }; | ||||||
3199 | |||||||
3200 | |||||||
3201 | /// Represents a GCC generic vector type. This type is created using | ||||||
3202 | /// __attribute__((vector_size(n)), where "n" specifies the vector size in | ||||||
3203 | /// bytes; or from an Altivec __vector or vector declaration. | ||||||
3204 | /// Since the constructor takes the number of vector elements, the | ||||||
3205 | /// client is responsible for converting the size into the number of elements. | ||||||
3206 | class VectorType : public Type, public llvm::FoldingSetNode { | ||||||
3207 | public: | ||||||
3208 | enum VectorKind { | ||||||
3209 | /// not a target-specific vector type | ||||||
3210 | GenericVector, | ||||||
3211 | |||||||
3212 | /// is AltiVec vector | ||||||
3213 | AltiVecVector, | ||||||
3214 | |||||||
3215 | /// is AltiVec 'vector Pixel' | ||||||
3216 | AltiVecPixel, | ||||||
3217 | |||||||
3218 | /// is AltiVec 'vector bool ...' | ||||||
3219 | AltiVecBool, | ||||||
3220 | |||||||
3221 | /// is ARM Neon vector | ||||||
3222 | NeonVector, | ||||||
3223 | |||||||
3224 | /// is ARM Neon polynomial vector | ||||||
3225 | NeonPolyVector | ||||||
3226 | }; | ||||||
3227 | |||||||
3228 | protected: | ||||||
3229 | friend class ASTContext; // ASTContext creates these. | ||||||
3230 | |||||||
3231 | /// The element type of the vector. | ||||||
3232 | QualType ElementType; | ||||||
3233 | |||||||
3234 | VectorType(QualType vecType, unsigned nElements, QualType canonType, | ||||||
3235 | VectorKind vecKind); | ||||||
3236 | |||||||
3237 | VectorType(TypeClass tc, QualType vecType, unsigned nElements, | ||||||
3238 | QualType canonType, VectorKind vecKind); | ||||||
3239 | |||||||
3240 | public: | ||||||
3241 | QualType getElementType() const { return ElementType; } | ||||||
3242 | unsigned getNumElements() const { return VectorTypeBits.NumElements; } | ||||||
3243 | |||||||
3244 | static bool isVectorSizeTooLarge(unsigned NumElements) { | ||||||
3245 | return NumElements > VectorTypeBitfields::MaxNumElements; | ||||||
3246 | } | ||||||
3247 | |||||||
3248 | bool isSugared() const { return false; } | ||||||
3249 | QualType desugar() const { return QualType(this, 0); } | ||||||
3250 | |||||||
3251 | VectorKind getVectorKind() const { | ||||||
3252 | return VectorKind(VectorTypeBits.VecKind); | ||||||
3253 | } | ||||||
3254 | |||||||
3255 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
3256 | Profile(ID, getElementType(), getNumElements(), | ||||||
3257 | getTypeClass(), getVectorKind()); | ||||||
3258 | } | ||||||
3259 | |||||||
3260 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, | ||||||
3261 | unsigned NumElements, TypeClass TypeClass, | ||||||
3262 | VectorKind VecKind) { | ||||||
3263 | ID.AddPointer(ElementType.getAsOpaquePtr()); | ||||||
3264 | ID.AddInteger(NumElements); | ||||||
3265 | ID.AddInteger(TypeClass); | ||||||
3266 | ID.AddInteger(VecKind); | ||||||
3267 | } | ||||||
3268 | |||||||
3269 | static bool classof(const Type *T) { | ||||||
3270 | return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; | ||||||
3271 | } | ||||||
3272 | }; | ||||||
3273 | |||||||
3274 | /// Represents a vector type where either the type or size is dependent. | ||||||
3275 | //// | ||||||
3276 | /// For example: | ||||||
3277 | /// \code | ||||||
3278 | /// template<typename T, int Size> | ||||||
3279 | /// class vector { | ||||||
3280 | /// typedef T __attribute__((vector_size(Size))) type; | ||||||
3281 | /// } | ||||||
3282 | /// \endcode | ||||||
3283 | class DependentVectorType : public Type, public llvm::FoldingSetNode { | ||||||
3284 | friend class ASTContext; | ||||||
3285 | |||||||
3286 | const ASTContext &Context; | ||||||
3287 | QualType ElementType; | ||||||
3288 | Expr *SizeExpr; | ||||||
3289 | SourceLocation Loc; | ||||||
3290 | |||||||
3291 | DependentVectorType(const ASTContext &Context, QualType ElementType, | ||||||
3292 | QualType CanonType, Expr *SizeExpr, | ||||||
3293 | SourceLocation Loc, VectorType::VectorKind vecKind); | ||||||
3294 | |||||||
3295 | public: | ||||||
3296 | Expr *getSizeExpr() const { return SizeExpr; } | ||||||
3297 | QualType getElementType() const { return ElementType; } | ||||||
3298 | SourceLocation getAttributeLoc() const { return Loc; } | ||||||
3299 | VectorType::VectorKind getVectorKind() const { | ||||||
3300 | return VectorType::VectorKind(VectorTypeBits.VecKind); | ||||||
3301 | } | ||||||
3302 | |||||||
3303 | bool isSugared() const { return false; } | ||||||
3304 | QualType desugar() const { return QualType(this, 0); } | ||||||
3305 | |||||||
3306 | static bool classof(const Type *T) { | ||||||
3307 | return T->getTypeClass() == DependentVector; | ||||||
3308 | } | ||||||
3309 | |||||||
3310 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
3311 | Profile(ID, Context, getElementType(), getSizeExpr(), getVectorKind()); | ||||||
3312 | } | ||||||
3313 | |||||||
3314 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, | ||||||
3315 | QualType ElementType, const Expr *SizeExpr, | ||||||
3316 | VectorType::VectorKind VecKind); | ||||||
3317 | }; | ||||||
3318 | |||||||
3319 | /// ExtVectorType - Extended vector type. This type is created using | ||||||
3320 | /// __attribute__((ext_vector_type(n)), where "n" is the number of elements. | ||||||
3321 | /// Unlike vector_size, ext_vector_type is only allowed on typedef's. This | ||||||
3322 | /// class enables syntactic extensions, like Vector Components for accessing | ||||||
3323 | /// points (as .xyzw), colors (as .rgba), and textures (modeled after OpenGL | ||||||
3324 | /// Shading Language). | ||||||
3325 | class ExtVectorType : public VectorType { | ||||||
3326 | friend class ASTContext; // ASTContext creates these. | ||||||
3327 | |||||||
3328 | ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) | ||||||
3329 | : VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} | ||||||
3330 | |||||||
3331 | public: | ||||||
3332 | static int getPointAccessorIdx(char c) { | ||||||
3333 | switch (c) { | ||||||
3334 | default: return -1; | ||||||
3335 | case 'x': case 'r': return 0; | ||||||
3336 | case 'y': case 'g': return 1; | ||||||
3337 | case 'z': case 'b': return 2; | ||||||
3338 | case 'w': case 'a': return 3; | ||||||
3339 | } | ||||||
3340 | } | ||||||
3341 | |||||||
3342 | static int getNumericAccessorIdx(char c) { | ||||||
3343 | switch (c) { | ||||||
3344 | default: return -1; | ||||||
3345 | case '0': return 0; | ||||||
3346 | case '1': return 1; | ||||||
3347 | case '2': return 2; | ||||||
3348 | case '3': return 3; | ||||||
3349 | case '4': return 4; | ||||||
3350 | case '5': return 5; | ||||||
3351 | case '6': return 6; | ||||||
3352 | case '7': return 7; | ||||||
3353 | case '8': return 8; | ||||||
3354 | case '9': return 9; | ||||||
3355 | case 'A': | ||||||
3356 | case 'a': return 10; | ||||||
3357 | case 'B': | ||||||
3358 | case 'b': return 11; | ||||||
3359 | case 'C': | ||||||
3360 | case 'c': return 12; | ||||||
3361 | case 'D': | ||||||
3362 | case 'd': return 13; | ||||||
3363 | case 'E': | ||||||
3364 | case 'e': return 14; | ||||||
3365 | case 'F': | ||||||
3366 | case 'f': return 15; | ||||||
3367 | } | ||||||
3368 | } | ||||||
3369 | |||||||
3370 | static int getAccessorIdx(char c, bool isNumericAccessor) { | ||||||
3371 | if (isNumericAccessor) | ||||||
3372 | return getNumericAccessorIdx(c); | ||||||
3373 | else | ||||||
3374 | return getPointAccessorIdx(c); | ||||||
3375 | } | ||||||
3376 | |||||||
3377 | bool isAccessorWithinNumElements(char c, bool isNumericAccessor) const { | ||||||
3378 | if (int idx = getAccessorIdx(c, isNumericAccessor)+1) | ||||||
3379 | return unsigned(idx-1) < getNumElements(); | ||||||
3380 | return false; | ||||||
3381 | } | ||||||
3382 | |||||||
3383 | bool isSugared() const { return false; } | ||||||
3384 | QualType desugar() const { return QualType(this, 0); } | ||||||
3385 | |||||||
3386 | static bool classof(const Type *T) { | ||||||
3387 | return T->getTypeClass() == ExtVector; | ||||||
3388 | } | ||||||
3389 | }; | ||||||
3390 | |||||||
3391 | /// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base | ||||||
3392 | /// class of FunctionNoProtoType and FunctionProtoType. | ||||||
3393 | class FunctionType : public Type { | ||||||
3394 | // The type returned by the function. | ||||||
3395 | QualType ResultType; | ||||||
3396 | |||||||
3397 | public: | ||||||
3398 | /// Interesting information about a specific parameter that can't simply | ||||||
3399 | /// be reflected in parameter's type. This is only used by FunctionProtoType | ||||||
3400 | /// but is in FunctionType to make this class available during the | ||||||
3401 | /// specification of the bases of FunctionProtoType. | ||||||
3402 | /// | ||||||
3403 | /// It makes sense to model language features this way when there's some | ||||||
3404 | /// sort of parameter-specific override (such as an attribute) that | ||||||
3405 | /// affects how the function is called. For example, the ARC ns_consumed | ||||||
3406 | /// attribute changes whether a parameter is passed at +0 (the default) | ||||||
3407 | /// or +1 (ns_consumed). This must be reflected in the function type, | ||||||
3408 | /// but isn't really a change to the parameter type. | ||||||
3409 | /// | ||||||
3410 | /// One serious disadvantage of modelling language features this way is | ||||||
3411 | /// that they generally do not work with language features that attempt | ||||||
3412 | /// to destructure types. For example, template argument deduction will | ||||||
3413 | /// not be able to match a parameter declared as | ||||||
3414 | /// T (*)(U) | ||||||
3415 | /// against an argument of type | ||||||
3416 | /// void (*)(__attribute__((ns_consumed)) id) | ||||||
3417 | /// because the substitution of T=void, U=id into the former will | ||||||
3418 | /// not produce the latter. | ||||||
3419 | class ExtParameterInfo { | ||||||
3420 | enum { | ||||||
3421 | ABIMask = 0x0F, | ||||||
3422 | IsConsumed = 0x10, | ||||||
3423 | HasPassObjSize = 0x20, | ||||||
3424 | IsNoEscape = 0x40, | ||||||
3425 | }; | ||||||
3426 | unsigned char Data = 0; | ||||||
3427 | |||||||
3428 | public: | ||||||
3429 | ExtParameterInfo() = default; | ||||||
3430 | |||||||
3431 | /// Return the ABI treatment of this parameter. | ||||||
3432 | ParameterABI getABI() const { return ParameterABI(Data & ABIMask); } | ||||||
3433 | ExtParameterInfo withABI(ParameterABI kind) const { | ||||||
3434 | ExtParameterInfo copy = *this; | ||||||
3435 | copy.Data = (copy.Data & ~ABIMask) | unsigned(kind); | ||||||
3436 | return copy; | ||||||
3437 | } | ||||||
3438 | |||||||
3439 | /// Is this parameter considered "consumed" by Objective-C ARC? | ||||||
3440 | /// Consumed parameters must have retainable object type. | ||||||
3441 | bool isConsumed() const { return (Data & IsConsumed); } | ||||||
3442 | ExtParameterInfo withIsConsumed(bool consumed) const { | ||||||
3443 | ExtParameterInfo copy = *this; | ||||||
3444 | if (consumed) | ||||||
3445 | copy.Data |= IsConsumed; | ||||||
3446 | else | ||||||
3447 | copy.Data &= ~IsConsumed; | ||||||
3448 | return copy; | ||||||
3449 | } | ||||||
3450 | |||||||
3451 | bool hasPassObjectSize() const { return Data & HasPassObjSize; } | ||||||
3452 | ExtParameterInfo withHasPassObjectSize() const { | ||||||
3453 | ExtParameterInfo Copy = *this; | ||||||
3454 | Copy.Data |= HasPassObjSize; | ||||||
3455 | return Copy; | ||||||
3456 | } | ||||||
3457 | |||||||
3458 | bool isNoEscape() const { return Data & IsNoEscape; } | ||||||
3459 | ExtParameterInfo withIsNoEscape(bool NoEscape) const { | ||||||
3460 | ExtParameterInfo Copy = *this; | ||||||
3461 | if (NoEscape) | ||||||
3462 | Copy.Data |= IsNoEscape; | ||||||
3463 | else | ||||||
3464 | Copy.Data &= ~IsNoEscape; | ||||||
3465 | return Copy; | ||||||
3466 | } | ||||||
3467 | |||||||
3468 | unsigned char getOpaqueValue() const { return Data; } | ||||||
3469 | static ExtParameterInfo getFromOpaqueValue(unsigned char data) { | ||||||
3470 | ExtParameterInfo result; | ||||||
3471 | result.Data = data; | ||||||
3472 | return result; | ||||||
3473 | } | ||||||
3474 | |||||||
3475 | friend bool operator==(ExtParameterInfo lhs, ExtParameterInfo rhs) { | ||||||
3476 | return lhs.Data == rhs.Data; | ||||||
3477 | } | ||||||
3478 | |||||||
3479 | friend bool operator!=(ExtParameterInfo lhs, ExtParameterInfo rhs) { | ||||||
3480 | return lhs.Data != rhs.Data; | ||||||
3481 | } | ||||||
3482 | }; | ||||||
3483 | |||||||
3484 | /// A class which abstracts out some details necessary for | ||||||
3485 | /// making a call. | ||||||
3486 | /// | ||||||
3487 | /// It is not actually used directly for storing this information in | ||||||
3488 | /// a FunctionType, although FunctionType does currently use the | ||||||
3489 | /// same bit-pattern. | ||||||
3490 | /// | ||||||
3491 | // If you add a field (say Foo), other than the obvious places (both, | ||||||
3492 | // constructors, compile failures), what you need to update is | ||||||
3493 | // * Operator== | ||||||
3494 | // * getFoo | ||||||
3495 | // * withFoo | ||||||
3496 | // * functionType. Add Foo, getFoo. | ||||||
3497 | // * ASTContext::getFooType | ||||||
3498 | // * ASTContext::mergeFunctionTypes | ||||||
3499 | // * FunctionNoProtoType::Profile | ||||||
3500 | // * FunctionProtoType::Profile | ||||||
3501 | // * TypePrinter::PrintFunctionProto | ||||||
3502 | // * AST read and write | ||||||
3503 | // * Codegen | ||||||
3504 | class ExtInfo { | ||||||
3505 | friend class FunctionType; | ||||||
3506 | |||||||
3507 | // Feel free to rearrange or add bits, but if you go over 12, | ||||||
3508 | // you'll need to adjust both the Bits field below and | ||||||
3509 | // Type::FunctionTypeBitfields. | ||||||
3510 | |||||||
3511 | // | CC |noreturn|produces|nocallersavedregs|regparm|nocfcheck| | ||||||
3512 | // |0 .. 4| 5 | 6 | 7 |8 .. 10| 11 | | ||||||
3513 | // | ||||||
3514 | // regparm is either 0 (no regparm attribute) or the regparm value+1. | ||||||
3515 | enum { CallConvMask = 0x1F }; | ||||||
3516 | enum { NoReturnMask = 0x20 }; | ||||||
3517 | enum { ProducesResultMask = 0x40 }; | ||||||
3518 | enum { NoCallerSavedRegsMask = 0x80 }; | ||||||
3519 | enum { NoCfCheckMask = 0x800 }; | ||||||
3520 | enum { | ||||||
3521 | RegParmMask = ~(CallConvMask | NoReturnMask | ProducesResultMask | | ||||||
3522 | NoCallerSavedRegsMask | NoCfCheckMask), | ||||||
3523 | RegParmOffset = 8 | ||||||
3524 | }; // Assumed to be the last field | ||||||
3525 | uint16_t Bits = CC_C; | ||||||
3526 | |||||||
3527 | ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {} | ||||||
3528 | |||||||
3529 | public: | ||||||
3530 | // Constructor with no defaults. Use this when you know that you | ||||||
3531 | // have all the elements (when reading an AST file for example). | ||||||
3532 | ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, | ||||||
3533 | bool producesResult, bool noCallerSavedRegs, bool NoCfCheck) { | ||||||
3534 | assert((!hasRegParm || regParm < 7) && "Invalid regparm value")(((!hasRegParm || regParm < 7) && "Invalid regparm value" ) ? static_cast<void> (0) : __assert_fail ("(!hasRegParm || regParm < 7) && \"Invalid regparm value\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 3534, __PRETTY_FUNCTION__)); | ||||||
3535 | Bits = ((unsigned)cc) | (noReturn ? NoReturnMask : 0) | | ||||||
3536 | (producesResult ? ProducesResultMask : 0) | | ||||||
3537 | (noCallerSavedRegs ? NoCallerSavedRegsMask : 0) | | ||||||
3538 | (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0) | | ||||||
3539 | (NoCfCheck ? NoCfCheckMask : 0); | ||||||
3540 | } | ||||||
3541 | |||||||
3542 | // Constructor with all defaults. Use when for example creating a | ||||||
3543 | // function known to use defaults. | ||||||
3544 | ExtInfo() = default; | ||||||
3545 | |||||||
3546 | // Constructor with just the calling convention, which is an important part | ||||||
3547 | // of the canonical type. | ||||||
3548 | ExtInfo(CallingConv CC) : Bits(CC) {} | ||||||
3549 | |||||||
3550 | bool getNoReturn() const { return Bits & NoReturnMask; } | ||||||
3551 | bool getProducesResult() const { return Bits & ProducesResultMask; } | ||||||
3552 | bool getNoCallerSavedRegs() const { return Bits & NoCallerSavedRegsMask; } | ||||||
3553 | bool getNoCfCheck() const { return Bits & NoCfCheckMask; } | ||||||
3554 | bool getHasRegParm() const { return (Bits >> RegParmOffset) != 0; } | ||||||
3555 | |||||||
3556 | unsigned getRegParm() const { | ||||||
3557 | unsigned RegParm = (Bits & RegParmMask) >> RegParmOffset; | ||||||
3558 | if (RegParm > 0) | ||||||
3559 | --RegParm; | ||||||
3560 | return RegParm; | ||||||
3561 | } | ||||||
3562 | |||||||
3563 | CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } | ||||||
3564 | |||||||
3565 | bool operator==(ExtInfo Other) const { | ||||||
3566 | return Bits == Other.Bits; | ||||||
3567 | } | ||||||
3568 | bool operator!=(ExtInfo Other) const { | ||||||
3569 | return Bits != Other.Bits; | ||||||
3570 | } | ||||||
3571 | |||||||
3572 | // Note that we don't have setters. That is by design, use | ||||||
3573 | // the following with methods instead of mutating these objects. | ||||||
3574 | |||||||
3575 | ExtInfo withNoReturn(bool noReturn) const { | ||||||
3576 | if (noReturn) | ||||||
3577 | return ExtInfo(Bits | NoReturnMask); | ||||||
3578 | else | ||||||
3579 | return ExtInfo(Bits & ~NoReturnMask); | ||||||
3580 | } | ||||||
3581 | |||||||
3582 | ExtInfo withProducesResult(bool producesResult) const { | ||||||
3583 | if (producesResult) | ||||||
3584 | return ExtInfo(Bits | ProducesResultMask); | ||||||
3585 | else | ||||||
3586 | return ExtInfo(Bits & ~ProducesResultMask); | ||||||
3587 | } | ||||||
3588 | |||||||
3589 | ExtInfo withNoCallerSavedRegs(bool noCallerSavedRegs) const { | ||||||
3590 | if (noCallerSavedRegs) | ||||||
3591 | return ExtInfo(Bits | NoCallerSavedRegsMask); | ||||||
3592 | else | ||||||
3593 | return ExtInfo(Bits & ~NoCallerSavedRegsMask); | ||||||
3594 | } | ||||||
3595 | |||||||
3596 | ExtInfo withNoCfCheck(bool noCfCheck) const { | ||||||
3597 | if (noCfCheck) | ||||||
3598 | return ExtInfo(Bits | NoCfCheckMask); | ||||||
3599 | else | ||||||
3600 | return ExtInfo(Bits & ~NoCfCheckMask); | ||||||
3601 | } | ||||||
3602 | |||||||
3603 | ExtInfo withRegParm(unsigned RegParm) const { | ||||||
3604 | assert(RegParm < 7 && "Invalid regparm value")((RegParm < 7 && "Invalid regparm value") ? static_cast <void> (0) : __assert_fail ("RegParm < 7 && \"Invalid regparm value\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 3604, __PRETTY_FUNCTION__)); | ||||||
3605 | return ExtInfo((Bits & ~RegParmMask) | | ||||||
3606 | ((RegParm + 1) << RegParmOffset)); | ||||||
3607 | } | ||||||
3608 | |||||||
3609 | ExtInfo withCallingConv(CallingConv cc) const { | ||||||
3610 | return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); | ||||||
3611 | } | ||||||
3612 | |||||||
3613 | void Profile(llvm::FoldingSetNodeID &ID) const { | ||||||
3614 | ID.AddInteger(Bits); | ||||||
3615 | } | ||||||
3616 | }; | ||||||
3617 | |||||||
3618 | /// A simple holder for a QualType representing a type in an | ||||||
3619 | /// exception specification. Unfortunately needed by FunctionProtoType | ||||||
3620 | /// because TrailingObjects cannot handle repeated types. | ||||||
3621 | struct ExceptionType { QualType Type; }; | ||||||
3622 | |||||||
3623 | /// A simple holder for various uncommon bits which do not fit in | ||||||
3624 | /// FunctionTypeBitfields. Aligned to alignof(void *) to maintain the | ||||||
3625 | /// alignment of subsequent objects in TrailingObjects. You must update | ||||||
3626 | /// hasExtraBitfields in FunctionProtoType after adding extra data here. | ||||||
3627 | struct alignas(void *) FunctionTypeExtraBitfields { | ||||||
3628 | /// The number of types in the exception specification. | ||||||
3629 | /// A whole unsigned is not needed here and according to | ||||||
3630 | /// [implimits] 8 bits would be enough here. | ||||||
3631 | unsigned NumExceptionType; | ||||||
3632 | }; | ||||||
3633 | |||||||
3634 | protected: | ||||||
3635 | FunctionType(TypeClass tc, QualType res, | ||||||
3636 | QualType Canonical, bool Dependent, | ||||||
3637 | bool InstantiationDependent, | ||||||
3638 | bool VariablyModified, bool ContainsUnexpandedParameterPack, | ||||||
3639 | ExtInfo Info) | ||||||
3640 | : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, | ||||||
3641 | ContainsUnexpandedParameterPack), | ||||||
3642 | ResultType(res) { | ||||||
3643 | FunctionTypeBits.ExtInfo = Info.Bits; | ||||||
3644 | } | ||||||
3645 | |||||||
3646 | Qualifiers getFastTypeQuals() const { | ||||||
3647 | return Qualifiers::fromFastMask(FunctionTypeBits.FastTypeQuals); | ||||||
3648 | } | ||||||
3649 | |||||||
3650 | public: | ||||||
3651 | QualType getReturnType() const { return ResultType; } | ||||||
3652 | |||||||
3653 | bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } | ||||||
3654 | unsigned getRegParmType() const { return getExtInfo().getRegParm(); } | ||||||
3655 | |||||||
3656 | /// Determine whether this function type includes the GNU noreturn | ||||||
3657 | /// attribute. The C++11 [[noreturn]] attribute does not affect the function | ||||||
3658 | /// type. | ||||||
3659 | bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } | ||||||
3660 | |||||||
3661 | CallingConv getCallConv() const { return getExtInfo().getCC(); } | ||||||
3662 | ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } | ||||||
3663 | |||||||
3664 | static_assert((~Qualifiers::FastMask & Qualifiers::CVRMask) == 0, | ||||||
3665 | "Const, volatile and restrict are assumed to be a subset of " | ||||||
3666 | "the fast qualifiers."); | ||||||
3667 | |||||||
3668 | bool isConst() const { return getFastTypeQuals().hasConst(); } | ||||||
3669 | bool isVolatile() const { return getFastTypeQuals().hasVolatile(); } | ||||||
3670 | bool isRestrict() const { return getFastTypeQuals().hasRestrict(); } | ||||||
3671 | |||||||
3672 | /// Determine the type of an expression that calls a function of | ||||||
3673 | /// this type. | ||||||
3674 | QualType getCallResultType(const ASTContext &Context) const { | ||||||
3675 | return getReturnType().getNonLValueExprType(Context); | ||||||
3676 | } | ||||||
3677 | |||||||
3678 | static StringRef getNameForCallConv(CallingConv CC); | ||||||
3679 | |||||||
3680 | static bool classof(const Type *T) { | ||||||
3681 | return T->getTypeClass() == FunctionNoProto || | ||||||
3682 | T->getTypeClass() == FunctionProto; | ||||||
3683 | } | ||||||
3684 | }; | ||||||
3685 | |||||||
3686 | /// Represents a K&R-style 'int foo()' function, which has | ||||||
3687 | /// no information available about its arguments. | ||||||
3688 | class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { | ||||||
3689 | friend class ASTContext; // ASTContext creates these. | ||||||
3690 | |||||||
3691 | FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) | ||||||
3692 | : FunctionType(FunctionNoProto, Result, Canonical, | ||||||
3693 | /*Dependent=*/false, /*InstantiationDependent=*/false, | ||||||
3694 | Result->isVariablyModifiedType(), | ||||||
3695 | /*ContainsUnexpandedParameterPack=*/false, Info) {} | ||||||
3696 | |||||||
3697 | public: | ||||||
3698 | // No additional state past what FunctionType provides. | ||||||
3699 | |||||||
3700 | bool isSugared() const { return false; } | ||||||
3701 | QualType desugar() const { return QualType(this, 0); } | ||||||
3702 | |||||||
3703 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
3704 | Profile(ID, getReturnType(), getExtInfo()); | ||||||
3705 | } | ||||||
3706 | |||||||
3707 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, | ||||||
3708 | ExtInfo Info) { | ||||||
3709 | Info.Profile(ID); | ||||||
3710 | ID.AddPointer(ResultType.getAsOpaquePtr()); | ||||||
3711 | } | ||||||
3712 | |||||||
3713 | static bool classof(const Type *T) { | ||||||
3714 | return T->getTypeClass() == FunctionNoProto; | ||||||
3715 | } | ||||||
3716 | }; | ||||||
3717 | |||||||
3718 | /// Represents a prototype with parameter type info, e.g. | ||||||
3719 | /// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no | ||||||
3720 | /// parameters, not as having a single void parameter. Such a type can have | ||||||
3721 | /// an exception specification, but this specification is not part of the | ||||||
3722 | /// canonical type. FunctionProtoType has several trailing objects, some of | ||||||
3723 | /// which optional. For more information about the trailing objects see | ||||||
3724 | /// the first comment inside FunctionProtoType. | ||||||
3725 | class FunctionProtoType final | ||||||
3726 | : public FunctionType, | ||||||
3727 | public llvm::FoldingSetNode, | ||||||
3728 | private llvm::TrailingObjects< | ||||||
3729 | FunctionProtoType, QualType, FunctionType::FunctionTypeExtraBitfields, | ||||||
3730 | FunctionType::ExceptionType, Expr *, FunctionDecl *, | ||||||
3731 | FunctionType::ExtParameterInfo, Qualifiers> { | ||||||
3732 | friend class ASTContext; // ASTContext creates these. | ||||||
3733 | friend TrailingObjects; | ||||||
3734 | |||||||
3735 | // FunctionProtoType is followed by several trailing objects, some of | ||||||
3736 | // which optional. They are in order: | ||||||
3737 | // | ||||||
3738 | // * An array of getNumParams() QualType holding the parameter types. | ||||||
3739 | // Always present. Note that for the vast majority of FunctionProtoType, | ||||||
3740 | // these will be the only trailing objects. | ||||||
3741 | // | ||||||
3742 | // * Optionally if some extra data is stored in FunctionTypeExtraBitfields | ||||||
3743 | // (see FunctionTypeExtraBitfields and FunctionTypeBitfields): | ||||||
3744 | // a single FunctionTypeExtraBitfields. Present if and only if | ||||||
3745 | // hasExtraBitfields() is true. | ||||||
3746 | // | ||||||
3747 | // * Optionally exactly one of: | ||||||
3748 | // * an array of getNumExceptions() ExceptionType, | ||||||
3749 | // * a single Expr *, | ||||||
3750 | // * a pair of FunctionDecl *, | ||||||
3751 | // * a single FunctionDecl * | ||||||
3752 | // used to store information about the various types of exception | ||||||
3753 | // specification. See getExceptionSpecSize for the details. | ||||||
3754 | // | ||||||
3755 | // * Optionally an array of getNumParams() ExtParameterInfo holding | ||||||
3756 | // an ExtParameterInfo for each of the parameters. Present if and | ||||||
3757 | // only if hasExtParameterInfos() is true. | ||||||
3758 | // | ||||||
3759 | // * Optionally a Qualifiers object to represent extra qualifiers that can't | ||||||
3760 | // be represented by FunctionTypeBitfields.FastTypeQuals. Present if and only | ||||||
3761 | // if hasExtQualifiers() is true. | ||||||
3762 | // | ||||||
3763 | // The optional FunctionTypeExtraBitfields has to be before the data | ||||||
3764 | // related to the exception specification since it contains the number | ||||||
3765 | // of exception types. | ||||||
3766 | // | ||||||
3767 | // We put the ExtParameterInfos last. If all were equal, it would make | ||||||
3768 | // more sense to put these before the exception specification, because | ||||||
3769 | // it's much easier to skip past them compared to the elaborate switch | ||||||
3770 | // required to skip the exception specification. However, all is not | ||||||
3771 | // equal; ExtParameterInfos are used to model very uncommon features, | ||||||
3772 | // and it's better not to burden the more common paths. | ||||||
3773 | |||||||
3774 | public: | ||||||
3775 | /// Holds information about the various types of exception specification. | ||||||
3776 | /// ExceptionSpecInfo is not stored as such in FunctionProtoType but is | ||||||
3777 | /// used to group together the various bits of information about the | ||||||
3778 | /// exception specification. | ||||||
3779 | struct ExceptionSpecInfo { | ||||||
3780 | /// The kind of exception specification this is. | ||||||
3781 | ExceptionSpecificationType Type = EST_None; | ||||||
3782 | |||||||
3783 | /// Explicitly-specified list of exception types. | ||||||
3784 | ArrayRef<QualType> Exceptions; | ||||||
3785 | |||||||
3786 | /// Noexcept expression, if this is a computed noexcept specification. | ||||||
3787 | Expr *NoexceptExpr = nullptr; | ||||||
3788 | |||||||
3789 | /// The function whose exception specification this is, for | ||||||
3790 | /// EST_Unevaluated and EST_Uninstantiated. | ||||||
3791 | FunctionDecl *SourceDecl = nullptr; | ||||||
3792 | |||||||
3793 | /// The function template whose exception specification this is instantiated | ||||||
3794 | /// from, for EST_Uninstantiated. | ||||||
3795 | FunctionDecl *SourceTemplate = nullptr; | ||||||
3796 | |||||||
3797 | ExceptionSpecInfo() = default; | ||||||
3798 | |||||||
3799 | ExceptionSpecInfo(ExceptionSpecificationType EST) : Type(EST) {} | ||||||
3800 | }; | ||||||
3801 | |||||||
3802 | /// Extra information about a function prototype. ExtProtoInfo is not | ||||||
3803 | /// stored as such in FunctionProtoType but is used to group together | ||||||
3804 | /// the various bits of extra information about a function prototype. | ||||||
3805 | struct ExtProtoInfo { | ||||||
3806 | FunctionType::ExtInfo ExtInfo; | ||||||
3807 | bool Variadic : 1; | ||||||
3808 | bool HasTrailingReturn : 1; | ||||||
3809 | Qualifiers TypeQuals; | ||||||
3810 | RefQualifierKind RefQualifier = RQ_None; | ||||||
3811 | ExceptionSpecInfo ExceptionSpec; | ||||||
3812 | const ExtParameterInfo *ExtParameterInfos = nullptr; | ||||||
3813 | |||||||
3814 | ExtProtoInfo() : Variadic(false), HasTrailingReturn(false) {} | ||||||
3815 | |||||||
3816 | ExtProtoInfo(CallingConv CC) | ||||||
3817 | : ExtInfo(CC), Variadic(false), HasTrailingReturn(false) {} | ||||||
3818 | |||||||
3819 | ExtProtoInfo withExceptionSpec(const ExceptionSpecInfo &ESI) { | ||||||
3820 | ExtProtoInfo Result(*this); | ||||||
3821 | Result.ExceptionSpec = ESI; | ||||||
3822 | return Result; | ||||||
3823 | } | ||||||
3824 | }; | ||||||
3825 | |||||||
3826 | private: | ||||||
3827 | unsigned numTrailingObjects(OverloadToken<QualType>) const { | ||||||
3828 | return getNumParams(); | ||||||
3829 | } | ||||||
3830 | |||||||
3831 | unsigned numTrailingObjects(OverloadToken<FunctionTypeExtraBitfields>) const { | ||||||
3832 | return hasExtraBitfields(); | ||||||
3833 | } | ||||||
3834 | |||||||
3835 | unsigned numTrailingObjects(OverloadToken<ExceptionType>) const { | ||||||
3836 | return getExceptionSpecSize().NumExceptionType; | ||||||
3837 | } | ||||||
3838 | |||||||
3839 | unsigned numTrailingObjects(OverloadToken<Expr *>) const { | ||||||
3840 | return getExceptionSpecSize().NumExprPtr; | ||||||
3841 | } | ||||||
3842 | |||||||
3843 | unsigned numTrailingObjects(OverloadToken<FunctionDecl *>) const { | ||||||
3844 | return getExceptionSpecSize().NumFunctionDeclPtr; | ||||||
3845 | } | ||||||
3846 | |||||||
3847 | unsigned numTrailingObjects(OverloadToken<ExtParameterInfo>) const { | ||||||
3848 | return hasExtParameterInfos() ? getNumParams() : 0; | ||||||
3849 | } | ||||||
3850 | |||||||
3851 | /// Determine whether there are any argument types that | ||||||
3852 | /// contain an unexpanded parameter pack. | ||||||
3853 | static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, | ||||||
3854 | unsigned numArgs) { | ||||||
3855 | for (unsigned Idx = 0; Idx < numArgs; ++Idx) | ||||||
3856 | if (ArgArray[Idx]->containsUnexpandedParameterPack()) | ||||||
3857 | return true; | ||||||
3858 | |||||||
3859 | return false; | ||||||
3860 | } | ||||||
3861 | |||||||
3862 | FunctionProtoType(QualType result, ArrayRef<QualType> params, | ||||||
3863 | QualType canonical, const ExtProtoInfo &epi); | ||||||
3864 | |||||||
3865 | /// This struct is returned by getExceptionSpecSize and is used to | ||||||
3866 | /// translate an ExceptionSpecificationType to the number and kind | ||||||
3867 | /// of trailing objects related to the exception specification. | ||||||
3868 | struct ExceptionSpecSizeHolder { | ||||||
3869 | unsigned NumExceptionType; | ||||||
3870 | unsigned NumExprPtr; | ||||||
3871 | unsigned NumFunctionDeclPtr; | ||||||
3872 | }; | ||||||
3873 | |||||||
3874 | /// Return the number and kind of trailing objects | ||||||
3875 | /// related to the exception specification. | ||||||
3876 | static ExceptionSpecSizeHolder | ||||||
3877 | getExceptionSpecSize(ExceptionSpecificationType EST, unsigned NumExceptions) { | ||||||
3878 | switch (EST) { | ||||||
3879 | case EST_None: | ||||||
3880 | case EST_DynamicNone: | ||||||
3881 | case EST_MSAny: | ||||||
3882 | case EST_BasicNoexcept: | ||||||
3883 | case EST_Unparsed: | ||||||
3884 | case EST_NoThrow: | ||||||
3885 | return {0, 0, 0}; | ||||||
3886 | |||||||
3887 | case EST_Dynamic: | ||||||
3888 | return {NumExceptions, 0, 0}; | ||||||
3889 | |||||||
3890 | case EST_DependentNoexcept: | ||||||
3891 | case EST_NoexceptFalse: | ||||||
3892 | case EST_NoexceptTrue: | ||||||
3893 | return {0, 1, 0}; | ||||||
3894 | |||||||
3895 | case EST_Uninstantiated: | ||||||
3896 | return {0, 0, 2}; | ||||||
3897 | |||||||
3898 | case EST_Unevaluated: | ||||||
3899 | return {0, 0, 1}; | ||||||
3900 | } | ||||||
3901 | llvm_unreachable("bad exception specification kind")::llvm::llvm_unreachable_internal("bad exception specification kind" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 3901); | ||||||
3902 | } | ||||||
3903 | |||||||
3904 | /// Return the number and kind of trailing objects | ||||||
3905 | /// related to the exception specification. | ||||||
3906 | ExceptionSpecSizeHolder getExceptionSpecSize() const { | ||||||
3907 | return getExceptionSpecSize(getExceptionSpecType(), getNumExceptions()); | ||||||
3908 | } | ||||||
3909 | |||||||
3910 | /// Whether the trailing FunctionTypeExtraBitfields is present. | ||||||
3911 | static bool hasExtraBitfields(ExceptionSpecificationType EST) { | ||||||
3912 | // If the exception spec type is EST_Dynamic then we have > 0 exception | ||||||
3913 | // types and the exact number is stored in FunctionTypeExtraBitfields. | ||||||
3914 | return EST == EST_Dynamic; | ||||||
3915 | } | ||||||
3916 | |||||||
3917 | /// Whether the trailing FunctionTypeExtraBitfields is present. | ||||||
3918 | bool hasExtraBitfields() const { | ||||||
3919 | return hasExtraBitfields(getExceptionSpecType()); | ||||||
3920 | } | ||||||
3921 | |||||||
3922 | bool hasExtQualifiers() const { | ||||||
3923 | return FunctionTypeBits.HasExtQuals; | ||||||
3924 | } | ||||||
3925 | |||||||
3926 | public: | ||||||
3927 | unsigned getNumParams() const { return FunctionTypeBits.NumParams; } | ||||||
3928 | |||||||
3929 | QualType getParamType(unsigned i) const { | ||||||
3930 | assert(i < getNumParams() && "invalid parameter index")((i < getNumParams() && "invalid parameter index") ? static_cast<void> (0) : __assert_fail ("i < getNumParams() && \"invalid parameter index\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 3930, __PRETTY_FUNCTION__)); | ||||||
3931 | return param_type_begin()[i]; | ||||||
3932 | } | ||||||
3933 | |||||||
3934 | ArrayRef<QualType> getParamTypes() const { | ||||||
3935 | return llvm::makeArrayRef(param_type_begin(), param_type_end()); | ||||||
3936 | } | ||||||
3937 | |||||||
3938 | ExtProtoInfo getExtProtoInfo() const { | ||||||
3939 | ExtProtoInfo EPI; | ||||||
3940 | EPI.ExtInfo = getExtInfo(); | ||||||
3941 | EPI.Variadic = isVariadic(); | ||||||
3942 | EPI.HasTrailingReturn = hasTrailingReturn(); | ||||||
3943 | EPI.ExceptionSpec.Type = getExceptionSpecType(); | ||||||
3944 | EPI.TypeQuals = getMethodQuals(); | ||||||
3945 | EPI.RefQualifier = getRefQualifier(); | ||||||
3946 | if (EPI.ExceptionSpec.Type == EST_Dynamic) { | ||||||
3947 | EPI.ExceptionSpec.Exceptions = exceptions(); | ||||||
3948 | } else if (isComputedNoexcept(EPI.ExceptionSpec.Type)) { | ||||||
3949 | EPI.ExceptionSpec.NoexceptExpr = getNoexceptExpr(); | ||||||
3950 | } else if (EPI.ExceptionSpec.Type == EST_Uninstantiated) { | ||||||
3951 | EPI.ExceptionSpec.SourceDecl = getExceptionSpecDecl(); | ||||||
3952 | EPI.ExceptionSpec.SourceTemplate = getExceptionSpecTemplate(); | ||||||
3953 | } else if (EPI.ExceptionSpec.Type == EST_Unevaluated) { | ||||||
3954 | EPI.ExceptionSpec.SourceDecl = getExceptionSpecDecl(); | ||||||
3955 | } | ||||||
3956 | EPI.ExtParameterInfos = getExtParameterInfosOrNull(); | ||||||
3957 | return EPI; | ||||||
3958 | } | ||||||
3959 | |||||||
3960 | /// Get the kind of exception specification on this function. | ||||||
3961 | ExceptionSpecificationType getExceptionSpecType() const { | ||||||
3962 | return static_cast<ExceptionSpecificationType>( | ||||||
3963 | FunctionTypeBits.ExceptionSpecType); | ||||||
3964 | } | ||||||
3965 | |||||||
3966 | /// Return whether this function has any kind of exception spec. | ||||||
3967 | bool hasExceptionSpec() const { return getExceptionSpecType() != EST_None; } | ||||||
3968 | |||||||
3969 | /// Return whether this function has a dynamic (throw) exception spec. | ||||||
3970 | bool hasDynamicExceptionSpec() const { | ||||||
3971 | return isDynamicExceptionSpec(getExceptionSpecType()); | ||||||
3972 | } | ||||||
3973 | |||||||
3974 | /// Return whether this function has a noexcept exception spec. | ||||||
3975 | bool hasNoexceptExceptionSpec() const { | ||||||
3976 | return isNoexceptExceptionSpec(getExceptionSpecType()); | ||||||
3977 | } | ||||||
3978 | |||||||
3979 | /// Return whether this function has a dependent exception spec. | ||||||
3980 | bool hasDependentExceptionSpec() const; | ||||||
3981 | |||||||
3982 | /// Return whether this function has an instantiation-dependent exception | ||||||
3983 | /// spec. | ||||||
3984 | bool hasInstantiationDependentExceptionSpec() const; | ||||||
3985 | |||||||
3986 | /// Return the number of types in the exception specification. | ||||||
3987 | unsigned getNumExceptions() const { | ||||||
3988 | return getExceptionSpecType() == EST_Dynamic | ||||||
3989 | ? getTrailingObjects<FunctionTypeExtraBitfields>() | ||||||
3990 | ->NumExceptionType | ||||||
3991 | : 0; | ||||||
3992 | } | ||||||
3993 | |||||||
3994 | /// Return the ith exception type, where 0 <= i < getNumExceptions(). | ||||||
3995 | QualType getExceptionType(unsigned i) const { | ||||||
3996 | assert(i < getNumExceptions() && "Invalid exception number!")((i < getNumExceptions() && "Invalid exception number!" ) ? static_cast<void> (0) : __assert_fail ("i < getNumExceptions() && \"Invalid exception number!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 3996, __PRETTY_FUNCTION__)); | ||||||
3997 | return exception_begin()[i]; | ||||||
3998 | } | ||||||
3999 | |||||||
4000 | /// Return the expression inside noexcept(expression), or a null pointer | ||||||
4001 | /// if there is none (because the exception spec is not of this form). | ||||||
4002 | Expr *getNoexceptExpr() const { | ||||||
4003 | if (!isComputedNoexcept(getExceptionSpecType())) | ||||||
4004 | return nullptr; | ||||||
4005 | return *getTrailingObjects<Expr *>(); | ||||||
4006 | } | ||||||
4007 | |||||||
4008 | /// If this function type has an exception specification which hasn't | ||||||
4009 | /// been determined yet (either because it has not been evaluated or because | ||||||
4010 | /// it has not been instantiated), this is the function whose exception | ||||||
4011 | /// specification is represented by this type. | ||||||
4012 | FunctionDecl *getExceptionSpecDecl() const { | ||||||
4013 | if (getExceptionSpecType() != EST_Uninstantiated && | ||||||
4014 | getExceptionSpecType() != EST_Unevaluated) | ||||||
4015 | return nullptr; | ||||||
4016 | return getTrailingObjects<FunctionDecl *>()[0]; | ||||||
4017 | } | ||||||
4018 | |||||||
4019 | /// If this function type has an uninstantiated exception | ||||||
4020 | /// specification, this is the function whose exception specification | ||||||
4021 | /// should be instantiated to find the exception specification for | ||||||
4022 | /// this type. | ||||||
4023 | FunctionDecl *getExceptionSpecTemplate() const { | ||||||
4024 | if (getExceptionSpecType() != EST_Uninstantiated) | ||||||
4025 | return nullptr; | ||||||
4026 | return getTrailingObjects<FunctionDecl *>()[1]; | ||||||
4027 | } | ||||||
4028 | |||||||
4029 | /// Determine whether this function type has a non-throwing exception | ||||||
4030 | /// specification. | ||||||
4031 | CanThrowResult canThrow() const; | ||||||
4032 | |||||||
4033 | /// Determine whether this function type has a non-throwing exception | ||||||
4034 | /// specification. If this depends on template arguments, returns | ||||||
4035 | /// \c ResultIfDependent. | ||||||
4036 | bool isNothrow(bool ResultIfDependent = false) const { | ||||||
4037 | return ResultIfDependent ? canThrow() != CT_Can : canThrow() == CT_Cannot; | ||||||
4038 | } | ||||||
4039 | |||||||
4040 | /// Whether this function prototype is variadic. | ||||||
4041 | bool isVariadic() const { return FunctionTypeBits.Variadic; } | ||||||
4042 | |||||||
4043 | /// Determines whether this function prototype contains a | ||||||
4044 | /// parameter pack at the end. | ||||||
4045 | /// | ||||||
4046 | /// A function template whose last parameter is a parameter pack can be | ||||||
4047 | /// called with an arbitrary number of arguments, much like a variadic | ||||||
4048 | /// function. | ||||||
4049 | bool isTemplateVariadic() const; | ||||||
4050 | |||||||
4051 | /// Whether this function prototype has a trailing return type. | ||||||
4052 | bool hasTrailingReturn() const { return FunctionTypeBits.HasTrailingReturn; } | ||||||
4053 | |||||||
4054 | Qualifiers getMethodQuals() const { | ||||||
4055 | if (hasExtQualifiers()) | ||||||
4056 | return *getTrailingObjects<Qualifiers>(); | ||||||
4057 | else | ||||||
4058 | return getFastTypeQuals(); | ||||||
4059 | } | ||||||
4060 | |||||||
4061 | /// Retrieve the ref-qualifier associated with this function type. | ||||||
4062 | RefQualifierKind getRefQualifier() const { | ||||||
4063 | return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier); | ||||||
4064 | } | ||||||
4065 | |||||||
4066 | using param_type_iterator = const QualType *; | ||||||
4067 | using param_type_range = llvm::iterator_range<param_type_iterator>; | ||||||
4068 | |||||||
4069 | param_type_range param_types() const { | ||||||
4070 | return param_type_range(param_type_begin(), param_type_end()); | ||||||
4071 | } | ||||||
4072 | |||||||
4073 | param_type_iterator param_type_begin() const { | ||||||
4074 | return getTrailingObjects<QualType>(); | ||||||
4075 | } | ||||||
4076 | |||||||
4077 | param_type_iterator param_type_end() const { | ||||||
4078 | return param_type_begin() + getNumParams(); | ||||||
4079 | } | ||||||
4080 | |||||||
4081 | using exception_iterator = const QualType *; | ||||||
4082 | |||||||
4083 | ArrayRef<QualType> exceptions() const { | ||||||
4084 | return llvm::makeArrayRef(exception_begin(), exception_end()); | ||||||
4085 | } | ||||||
4086 | |||||||
4087 | exception_iterator exception_begin() const { | ||||||
4088 | return reinterpret_cast<exception_iterator>( | ||||||
4089 | getTrailingObjects<ExceptionType>()); | ||||||
4090 | } | ||||||
4091 | |||||||
4092 | exception_iterator exception_end() const { | ||||||
4093 | return exception_begin() + getNumExceptions(); | ||||||
4094 | } | ||||||
4095 | |||||||
4096 | /// Is there any interesting extra information for any of the parameters | ||||||
4097 | /// of this function type? | ||||||
4098 | bool hasExtParameterInfos() const { | ||||||
4099 | return FunctionTypeBits.HasExtParameterInfos; | ||||||
4100 | } | ||||||
4101 | |||||||
4102 | ArrayRef<ExtParameterInfo> getExtParameterInfos() const { | ||||||
4103 | assert(hasExtParameterInfos())((hasExtParameterInfos()) ? static_cast<void> (0) : __assert_fail ("hasExtParameterInfos()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 4103, __PRETTY_FUNCTION__)); | ||||||
4104 | return ArrayRef<ExtParameterInfo>(getTrailingObjects<ExtParameterInfo>(), | ||||||
4105 | getNumParams()); | ||||||
4106 | } | ||||||
4107 | |||||||
4108 | /// Return a pointer to the beginning of the array of extra parameter | ||||||
4109 | /// information, if present, or else null if none of the parameters | ||||||
4110 | /// carry it. This is equivalent to getExtProtoInfo().ExtParameterInfos. | ||||||
4111 | const ExtParameterInfo *getExtParameterInfosOrNull() const { | ||||||
4112 | if (!hasExtParameterInfos()) | ||||||
4113 | return nullptr; | ||||||
4114 | return getTrailingObjects<ExtParameterInfo>(); | ||||||
4115 | } | ||||||
4116 | |||||||
4117 | ExtParameterInfo getExtParameterInfo(unsigned I) const { | ||||||
4118 | assert(I < getNumParams() && "parameter index out of range")((I < getNumParams() && "parameter index out of range" ) ? static_cast<void> (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 4118, __PRETTY_FUNCTION__)); | ||||||
4119 | if (hasExtParameterInfos()) | ||||||
4120 | return getTrailingObjects<ExtParameterInfo>()[I]; | ||||||
4121 | return ExtParameterInfo(); | ||||||
4122 | } | ||||||
4123 | |||||||
4124 | ParameterABI getParameterABI(unsigned I) const { | ||||||
4125 | assert(I < getNumParams() && "parameter index out of range")((I < getNumParams() && "parameter index out of range" ) ? static_cast<void> (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 4125, __PRETTY_FUNCTION__)); | ||||||
4126 | if (hasExtParameterInfos()) | ||||||
4127 | return getTrailingObjects<ExtParameterInfo>()[I].getABI(); | ||||||
4128 | return ParameterABI::Ordinary; | ||||||
4129 | } | ||||||
4130 | |||||||
4131 | bool isParamConsumed(unsigned I) const { | ||||||
4132 | assert(I < getNumParams() && "parameter index out of range")((I < getNumParams() && "parameter index out of range" ) ? static_cast<void> (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 4132, __PRETTY_FUNCTION__)); | ||||||
4133 | if (hasExtParameterInfos()) | ||||||
4134 | return getTrailingObjects<ExtParameterInfo>()[I].isConsumed(); | ||||||
4135 | return false; | ||||||
4136 | } | ||||||
4137 | |||||||
4138 | bool isSugared() const { return false; } | ||||||
4139 | QualType desugar() const { return QualType(this, 0); } | ||||||
4140 | |||||||
4141 | void printExceptionSpecification(raw_ostream &OS, | ||||||
4142 | const PrintingPolicy &Policy) const; | ||||||
4143 | |||||||
4144 | static bool classof(const Type *T) { | ||||||
4145 | return T->getTypeClass() == FunctionProto; | ||||||
4146 | } | ||||||
4147 | |||||||
4148 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); | ||||||
4149 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, | ||||||
4150 | param_type_iterator ArgTys, unsigned NumArgs, | ||||||
4151 | const ExtProtoInfo &EPI, const ASTContext &Context, | ||||||
4152 | bool Canonical); | ||||||
4153 | }; | ||||||
4154 | |||||||
4155 | /// Represents the dependent type named by a dependently-scoped | ||||||
4156 | /// typename using declaration, e.g. | ||||||
4157 | /// using typename Base<T>::foo; | ||||||
4158 | /// | ||||||
4159 | /// Template instantiation turns these into the underlying type. | ||||||
4160 | class UnresolvedUsingType : public Type { | ||||||
4161 | friend class ASTContext; // ASTContext creates these. | ||||||
4162 | |||||||
4163 | UnresolvedUsingTypenameDecl *Decl; | ||||||
4164 | |||||||
4165 | UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) | ||||||
4166 | : Type(UnresolvedUsing, QualType(), true, true, false, | ||||||
4167 | /*ContainsUnexpandedParameterPack=*/false), | ||||||
4168 | Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} | ||||||
4169 | |||||||
4170 | public: | ||||||
4171 | UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } | ||||||
4172 | |||||||
4173 | bool isSugared() const { return false; } | ||||||
4174 | QualType desugar() const { return QualType(this, 0); } | ||||||
4175 | |||||||
4176 | static bool classof(const Type *T) { | ||||||
4177 | return T->getTypeClass() == UnresolvedUsing; | ||||||
4178 | } | ||||||
4179 | |||||||
4180 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
4181 | return Profile(ID, Decl); | ||||||
4182 | } | ||||||
4183 | |||||||
4184 | static void Profile(llvm::FoldingSetNodeID &ID, | ||||||
4185 | UnresolvedUsingTypenameDecl *D) { | ||||||
4186 | ID.AddPointer(D); | ||||||
4187 | } | ||||||
4188 | }; | ||||||
4189 | |||||||
4190 | class TypedefType : public Type { | ||||||
4191 | TypedefNameDecl *Decl; | ||||||
4192 | |||||||
4193 | protected: | ||||||
4194 | friend class ASTContext; // ASTContext creates these. | ||||||
4195 | |||||||
4196 | TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can) | ||||||
4197 | : Type(tc, can, can->isDependentType(), | ||||||
4198 | can->isInstantiationDependentType(), | ||||||
4199 | can->isVariablyModifiedType(), | ||||||
4200 | /*ContainsUnexpandedParameterPack=*/false), | ||||||
4201 | Decl(const_cast<TypedefNameDecl*>(D)) { | ||||||
4202 | assert(!isa<TypedefType>(can) && "Invalid canonical type")((!isa<TypedefType>(can) && "Invalid canonical type" ) ? static_cast<void> (0) : __assert_fail ("!isa<TypedefType>(can) && \"Invalid canonical type\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 4202, __PRETTY_FUNCTION__)); | ||||||
4203 | } | ||||||
4204 | |||||||
4205 | public: | ||||||
4206 | TypedefNameDecl *getDecl() const { return Decl; } | ||||||
4207 | |||||||
4208 | bool isSugared() const { return true; } | ||||||
4209 | QualType desugar() const; | ||||||
4210 | |||||||
4211 | static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } | ||||||
4212 | }; | ||||||
4213 | |||||||
4214 | /// Sugar type that represents a type that was qualified by a qualifier written | ||||||
4215 | /// as a macro invocation. | ||||||
4216 | class MacroQualifiedType : public Type { | ||||||
4217 | friend class ASTContext; // ASTContext creates these. | ||||||
4218 | |||||||
4219 | QualType UnderlyingTy; | ||||||
4220 | const IdentifierInfo *MacroII; | ||||||
4221 | |||||||
4222 | MacroQualifiedType(QualType UnderlyingTy, QualType CanonTy, | ||||||
4223 | const IdentifierInfo *MacroII) | ||||||
4224 | : Type(MacroQualified, CanonTy, UnderlyingTy->isDependentType(), | ||||||
4225 | UnderlyingTy->isInstantiationDependentType(), | ||||||
4226 | UnderlyingTy->isVariablyModifiedType(), | ||||||
4227 | UnderlyingTy->containsUnexpandedParameterPack()), | ||||||
4228 | UnderlyingTy(UnderlyingTy), MacroII(MacroII) { | ||||||
4229 | assert(isa<AttributedType>(UnderlyingTy) &&((isa<AttributedType>(UnderlyingTy) && "Expected a macro qualified type to only wrap attributed types." ) ? static_cast<void> (0) : __assert_fail ("isa<AttributedType>(UnderlyingTy) && \"Expected a macro qualified type to only wrap attributed types.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 4230, __PRETTY_FUNCTION__)) | ||||||
4230 | "Expected a macro qualified type to only wrap attributed types.")((isa<AttributedType>(UnderlyingTy) && "Expected a macro qualified type to only wrap attributed types." ) ? static_cast<void> (0) : __assert_fail ("isa<AttributedType>(UnderlyingTy) && \"Expected a macro qualified type to only wrap attributed types.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 4230, __PRETTY_FUNCTION__)); | ||||||
4231 | } | ||||||
4232 | |||||||
4233 | public: | ||||||
4234 | const IdentifierInfo *getMacroIdentifier() const { return MacroII; } | ||||||
4235 | QualType getUnderlyingType() const { return UnderlyingTy; } | ||||||
4236 | |||||||
4237 | /// Return this attributed type's modified type with no qualifiers attached to | ||||||
4238 | /// it. | ||||||
4239 | QualType getModifiedType() const; | ||||||
4240 | |||||||
4241 | bool isSugared() const { return true; } | ||||||
4242 | QualType desugar() const; | ||||||
4243 | |||||||
4244 | static bool classof(const Type *T) { | ||||||
4245 | return T->getTypeClass() == MacroQualified; | ||||||
4246 | } | ||||||
4247 | }; | ||||||
4248 | |||||||
4249 | /// Represents a `typeof` (or __typeof__) expression (a GCC extension). | ||||||
4250 | class TypeOfExprType : public Type { | ||||||
4251 | Expr *TOExpr; | ||||||
4252 | |||||||
4253 | protected: | ||||||
4254 | friend class ASTContext; // ASTContext creates these. | ||||||
4255 | |||||||
4256 | TypeOfExprType(Expr *E, QualType can = QualType()); | ||||||
4257 | |||||||
4258 | public: | ||||||
4259 | Expr *getUnderlyingExpr() const { return TOExpr; } | ||||||
4260 | |||||||
4261 | /// Remove a single level of sugar. | ||||||
4262 | QualType desugar() const; | ||||||
4263 | |||||||
4264 | /// Returns whether this type directly provides sugar. | ||||||
4265 | bool isSugared() const; | ||||||
4266 | |||||||
4267 | static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } | ||||||
4268 | }; | ||||||
4269 | |||||||
4270 | /// Internal representation of canonical, dependent | ||||||
4271 | /// `typeof(expr)` types. | ||||||
4272 | /// | ||||||
4273 | /// This class is used internally by the ASTContext to manage | ||||||
4274 | /// canonical, dependent types, only. Clients will only see instances | ||||||
4275 | /// of this class via TypeOfExprType nodes. | ||||||
4276 | class DependentTypeOfExprType | ||||||
4277 | : public TypeOfExprType, public llvm::FoldingSetNode { | ||||||
4278 | const ASTContext &Context; | ||||||
4279 | |||||||
4280 | public: | ||||||
4281 | DependentTypeOfExprType(const ASTContext &Context, Expr *E) | ||||||
4282 | : TypeOfExprType(E), Context(Context) {} | ||||||
4283 | |||||||
4284 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
4285 | Profile(ID, Context, getUnderlyingExpr()); | ||||||
4286 | } | ||||||
4287 | |||||||
4288 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, | ||||||
4289 | Expr *E); | ||||||
4290 | }; | ||||||
4291 | |||||||
4292 | /// Represents `typeof(type)`, a GCC extension. | ||||||
4293 | class TypeOfType : public Type { | ||||||
4294 | friend class ASTContext; // ASTContext creates these. | ||||||
4295 | |||||||
4296 | QualType TOType; | ||||||
4297 | |||||||
4298 | TypeOfType(QualType T, QualType can) | ||||||
4299 | : Type(TypeOf, can, T->isDependentType(), | ||||||
4300 | T->isInstantiationDependentType(), | ||||||
4301 | T->isVariablyModifiedType(), | ||||||
4302 | T->containsUnexpandedParameterPack()), | ||||||
4303 | TOType(T) { | ||||||
4304 | assert(!isa<TypedefType>(can) && "Invalid canonical type")((!isa<TypedefType>(can) && "Invalid canonical type" ) ? static_cast<void> (0) : __assert_fail ("!isa<TypedefType>(can) && \"Invalid canonical type\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 4304, __PRETTY_FUNCTION__)); | ||||||
4305 | } | ||||||
4306 | |||||||
4307 | public: | ||||||
4308 | QualType getUnderlyingType() const { return TOType; } | ||||||
4309 | |||||||
4310 | /// Remove a single level of sugar. | ||||||
4311 | QualType desugar() const { return getUnderlyingType(); } | ||||||
4312 | |||||||
4313 | /// Returns whether this type directly provides sugar. | ||||||
4314 | bool isSugared() const { return true; } | ||||||
4315 | |||||||
4316 | static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } | ||||||
4317 | }; | ||||||
4318 | |||||||
4319 | /// Represents the type `decltype(expr)` (C++11). | ||||||
4320 | class DecltypeType : public Type { | ||||||
4321 | Expr *E; | ||||||
4322 | QualType UnderlyingType; | ||||||
4323 | |||||||
4324 | protected: | ||||||
4325 | friend class ASTContext; // ASTContext creates these. | ||||||
4326 | |||||||
4327 | DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); | ||||||
4328 | |||||||
4329 | public: | ||||||
4330 | Expr *getUnderlyingExpr() const { return E; } | ||||||
4331 | QualType getUnderlyingType() const { return UnderlyingType; } | ||||||
4332 | |||||||
4333 | /// Remove a single level of sugar. | ||||||
4334 | QualType desugar() const; | ||||||
4335 | |||||||
4336 | /// Returns whether this type directly provides sugar. | ||||||
4337 | bool isSugared() const; | ||||||
4338 | |||||||
4339 | static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } | ||||||
4340 | }; | ||||||
4341 | |||||||
4342 | /// Internal representation of canonical, dependent | ||||||
4343 | /// decltype(expr) types. | ||||||
4344 | /// | ||||||
4345 | /// This class is used internally by the ASTContext to manage | ||||||
4346 | /// canonical, dependent types, only. Clients will only see instances | ||||||
4347 | /// of this class via DecltypeType nodes. | ||||||
4348 | class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { | ||||||
4349 | const ASTContext &Context; | ||||||
4350 | |||||||
4351 | public: | ||||||
4352 | DependentDecltypeType(const ASTContext &Context, Expr *E); | ||||||
4353 | |||||||
4354 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
4355 | Profile(ID, Context, getUnderlyingExpr()); | ||||||
4356 | } | ||||||
4357 | |||||||
4358 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, | ||||||
4359 | Expr *E); | ||||||
4360 | }; | ||||||
4361 | |||||||
4362 | /// A unary type transform, which is a type constructed from another. | ||||||
4363 | class UnaryTransformType : public Type { | ||||||
4364 | public: | ||||||
4365 | enum UTTKind { | ||||||
4366 | EnumUnderlyingType | ||||||
4367 | }; | ||||||
4368 | |||||||
4369 | private: | ||||||
4370 | /// The untransformed type. | ||||||
4371 | QualType BaseType; | ||||||
4372 | |||||||
4373 | /// The transformed type if not dependent, otherwise the same as BaseType. | ||||||
4374 | QualType UnderlyingType; | ||||||
4375 | |||||||
4376 | UTTKind UKind; | ||||||
4377 | |||||||
4378 | protected: | ||||||
4379 | friend class ASTContext; | ||||||
4380 | |||||||
4381 | UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, | ||||||
4382 | QualType CanonicalTy); | ||||||
4383 | |||||||
4384 | public: | ||||||
4385 | bool isSugared() const { return !isDependentType(); } | ||||||
4386 | QualType desugar() const { return UnderlyingType; } | ||||||
4387 | |||||||
4388 | QualType getUnderlyingType() const { return UnderlyingType; } | ||||||
4389 | QualType getBaseType() const { return BaseType; } | ||||||
4390 | |||||||
4391 | UTTKind getUTTKind() const { return UKind; } | ||||||
4392 | |||||||
4393 | static bool classof(const Type *T) { | ||||||
4394 | return T->getTypeClass() == UnaryTransform; | ||||||
4395 | } | ||||||
4396 | }; | ||||||
4397 | |||||||
4398 | /// Internal representation of canonical, dependent | ||||||
4399 | /// __underlying_type(type) types. | ||||||
4400 | /// | ||||||
4401 | /// This class is used internally by the ASTContext to manage | ||||||
4402 | /// canonical, dependent types, only. Clients will only see instances | ||||||
4403 | /// of this class via UnaryTransformType nodes. | ||||||
4404 | class DependentUnaryTransformType : public UnaryTransformType, | ||||||
4405 | public llvm::FoldingSetNode { | ||||||
4406 | public: | ||||||
4407 | DependentUnaryTransformType(const ASTContext &C, QualType BaseType, | ||||||
4408 | UTTKind UKind); | ||||||
4409 | |||||||
4410 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
4411 | Profile(ID, getBaseType(), getUTTKind()); | ||||||
4412 | } | ||||||
4413 | |||||||
4414 | static void Profile(llvm::FoldingSetNodeID &ID, QualType BaseType, | ||||||
4415 | UTTKind UKind) { | ||||||
4416 | ID.AddPointer(BaseType.getAsOpaquePtr()); | ||||||
4417 | ID.AddInteger((unsigned)UKind); | ||||||
4418 | } | ||||||
4419 | }; | ||||||
4420 | |||||||
4421 | class TagType : public Type { | ||||||
4422 | friend class ASTReader; | ||||||
4423 | |||||||
4424 | /// Stores the TagDecl associated with this type. The decl may point to any | ||||||
4425 | /// TagDecl that declares the entity. | ||||||
4426 | TagDecl *decl; | ||||||
4427 | |||||||
4428 | protected: | ||||||
4429 | TagType(TypeClass TC, const TagDecl *D, QualType can); | ||||||
4430 | |||||||
4431 | public: | ||||||
4432 | TagDecl *getDecl() const; | ||||||
4433 | |||||||
4434 | /// Determines whether this type is in the process of being defined. | ||||||
4435 | bool isBeingDefined() const; | ||||||
4436 | |||||||
4437 | static bool classof(const Type *T) { | ||||||
4438 | return T->getTypeClass() == Enum || T->getTypeClass() == Record; | ||||||
4439 | } | ||||||
4440 | }; | ||||||
4441 | |||||||
4442 | /// A helper class that allows the use of isa/cast/dyncast | ||||||
4443 | /// to detect TagType objects of structs/unions/classes. | ||||||
4444 | class RecordType : public TagType { | ||||||
4445 | protected: | ||||||
4446 | friend class ASTContext; // ASTContext creates these. | ||||||
4447 | |||||||
4448 | explicit RecordType(const RecordDecl *D) | ||||||
4449 | : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) {} | ||||||
4450 | explicit RecordType(TypeClass TC, RecordDecl *D) | ||||||
4451 | : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) {} | ||||||
4452 | |||||||
4453 | public: | ||||||
4454 | RecordDecl *getDecl() const { | ||||||
4455 | return reinterpret_cast<RecordDecl*>(TagType::getDecl()); | ||||||
4456 | } | ||||||
4457 | |||||||
4458 | /// Recursively check all fields in the record for const-ness. If any field | ||||||
4459 | /// is declared const, return true. Otherwise, return false. | ||||||
4460 | bool hasConstFields() const; | ||||||
4461 | |||||||
4462 | bool isSugared() const { return false; } | ||||||
4463 | QualType desugar() const { return QualType(this, 0); } | ||||||
4464 | |||||||
4465 | static bool classof(const Type *T) { return T->getTypeClass() == Record; } | ||||||
4466 | }; | ||||||
4467 | |||||||
4468 | /// A helper class that allows the use of isa/cast/dyncast | ||||||
4469 | /// to detect TagType objects of enums. | ||||||
4470 | class EnumType : public TagType { | ||||||
4471 | friend class ASTContext; // ASTContext creates these. | ||||||
4472 | |||||||
4473 | explicit EnumType(const EnumDecl *D) | ||||||
4474 | : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) {} | ||||||
4475 | |||||||
4476 | public: | ||||||
4477 | EnumDecl *getDecl() const { | ||||||
4478 | return reinterpret_cast<EnumDecl*>(TagType::getDecl()); | ||||||
4479 | } | ||||||
4480 | |||||||
4481 | bool isSugared() const { return false; } | ||||||
4482 | QualType desugar() const { return QualType(this, 0); } | ||||||
4483 | |||||||
4484 | static bool classof(const Type *T) { return T->getTypeClass() == Enum; } | ||||||
4485 | }; | ||||||
4486 | |||||||
4487 | /// An attributed type is a type to which a type attribute has been applied. | ||||||
4488 | /// | ||||||
4489 | /// The "modified type" is the fully-sugared type to which the attributed | ||||||
4490 | /// type was applied; generally it is not canonically equivalent to the | ||||||
4491 | /// attributed type. The "equivalent type" is the minimally-desugared type | ||||||
4492 | /// which the type is canonically equivalent to. | ||||||
4493 | /// | ||||||
4494 | /// For example, in the following attributed type: | ||||||
4495 | /// int32_t __attribute__((vector_size(16))) | ||||||
4496 | /// - the modified type is the TypedefType for int32_t | ||||||
4497 | /// - the equivalent type is VectorType(16, int32_t) | ||||||
4498 | /// - the canonical type is VectorType(16, int) | ||||||
4499 | class AttributedType : public Type, public llvm::FoldingSetNode { | ||||||
4500 | public: | ||||||
4501 | using Kind = attr::Kind; | ||||||
4502 | |||||||
4503 | private: | ||||||
4504 | friend class ASTContext; // ASTContext creates these | ||||||
4505 | |||||||
4506 | QualType ModifiedType; | ||||||
4507 | QualType EquivalentType; | ||||||
4508 | |||||||
4509 | AttributedType(QualType canon, attr::Kind attrKind, QualType modified, | ||||||
4510 | QualType equivalent) | ||||||
4511 | : Type(Attributed, canon, equivalent->isDependentType(), | ||||||
4512 | equivalent->isInstantiationDependentType(), | ||||||
4513 | equivalent->isVariablyModifiedType(), | ||||||
4514 | equivalent->containsUnexpandedParameterPack()), | ||||||
4515 | ModifiedType(modified), EquivalentType(equivalent) { | ||||||
4516 | AttributedTypeBits.AttrKind = attrKind; | ||||||
4517 | } | ||||||
4518 | |||||||
4519 | public: | ||||||
4520 | Kind getAttrKind() const { | ||||||
4521 | return static_cast<Kind>(AttributedTypeBits.AttrKind); | ||||||
4522 | } | ||||||
4523 | |||||||
4524 | QualType getModifiedType() const { return ModifiedType; } | ||||||
4525 | QualType getEquivalentType() const { return EquivalentType; } | ||||||
4526 | |||||||
4527 | bool isSugared() const { return true; } | ||||||
4528 | QualType desugar() const { return getEquivalentType(); } | ||||||
4529 | |||||||
4530 | /// Does this attribute behave like a type qualifier? | ||||||
4531 | /// | ||||||
4532 | /// A type qualifier adjusts a type to provide specialized rules for | ||||||
4533 | /// a specific object, like the standard const and volatile qualifiers. | ||||||
4534 | /// This includes attributes controlling things like nullability, | ||||||
4535 | /// address spaces, and ARC ownership. The value of the object is still | ||||||
4536 | /// largely described by the modified type. | ||||||
4537 | /// | ||||||
4538 | /// In contrast, many type attributes "rewrite" their modified type to | ||||||
4539 | /// produce a fundamentally different type, not necessarily related in any | ||||||
4540 | /// formalizable way to the original type. For example, calling convention | ||||||
4541 | /// and vector attributes are not simple type qualifiers. | ||||||
4542 | /// | ||||||
4543 | /// Type qualifiers are often, but not always, reflected in the canonical | ||||||
4544 | /// type. | ||||||
4545 | bool isQualifier() const; | ||||||
4546 | |||||||
4547 | bool isMSTypeSpec() const; | ||||||
4548 | |||||||
4549 | bool isCallingConv() const; | ||||||
4550 | |||||||
4551 | llvm::Optional<NullabilityKind> getImmediateNullability() const; | ||||||
4552 | |||||||
4553 | /// Retrieve the attribute kind corresponding to the given | ||||||
4554 | /// nullability kind. | ||||||
4555 | static Kind getNullabilityAttrKind(NullabilityKind kind) { | ||||||
4556 | switch (kind) { | ||||||
4557 | case NullabilityKind::NonNull: | ||||||
4558 | return attr::TypeNonNull; | ||||||
4559 | |||||||
4560 | case NullabilityKind::Nullable: | ||||||
4561 | return attr::TypeNullable; | ||||||
4562 | |||||||
4563 | case NullabilityKind::Unspecified: | ||||||
4564 | return attr::TypeNullUnspecified; | ||||||
4565 | } | ||||||
4566 | llvm_unreachable("Unknown nullability kind.")::llvm::llvm_unreachable_internal("Unknown nullability kind." , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 4566); | ||||||
4567 | } | ||||||
4568 | |||||||
4569 | /// Strip off the top-level nullability annotation on the given | ||||||
4570 | /// type, if it's there. | ||||||
4571 | /// | ||||||
4572 | /// \param T The type to strip. If the type is exactly an | ||||||
4573 | /// AttributedType specifying nullability (without looking through | ||||||
4574 | /// type sugar), the nullability is returned and this type changed | ||||||
4575 | /// to the underlying modified type. | ||||||
4576 | /// | ||||||
4577 | /// \returns the top-level nullability, if present. | ||||||
4578 | static Optional<NullabilityKind> stripOuterNullability(QualType &T); | ||||||
4579 | |||||||
4580 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
4581 | Profile(ID, getAttrKind(), ModifiedType, EquivalentType); | ||||||
4582 | } | ||||||
4583 | |||||||
4584 | static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, | ||||||
4585 | QualType modified, QualType equivalent) { | ||||||
4586 | ID.AddInteger(attrKind); | ||||||
4587 | ID.AddPointer(modified.getAsOpaquePtr()); | ||||||
4588 | ID.AddPointer(equivalent.getAsOpaquePtr()); | ||||||
4589 | } | ||||||
4590 | |||||||
4591 | static bool classof(const Type *T) { | ||||||
4592 | return T->getTypeClass() == Attributed; | ||||||
4593 | } | ||||||
4594 | }; | ||||||
4595 | |||||||
4596 | class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { | ||||||
4597 | friend class ASTContext; // ASTContext creates these | ||||||
4598 | |||||||
4599 | // Helper data collector for canonical types. | ||||||
4600 | struct CanonicalTTPTInfo { | ||||||
4601 | unsigned Depth : 15; | ||||||
4602 | unsigned ParameterPack : 1; | ||||||
4603 | unsigned Index : 16; | ||||||
4604 | }; | ||||||
4605 | |||||||
4606 | union { | ||||||
4607 | // Info for the canonical type. | ||||||
4608 | CanonicalTTPTInfo CanTTPTInfo; | ||||||
4609 | |||||||
4610 | // Info for the non-canonical type. | ||||||
4611 | TemplateTypeParmDecl *TTPDecl; | ||||||
4612 | }; | ||||||
4613 | |||||||
4614 | /// Build a non-canonical type. | ||||||
4615 | TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) | ||||||
4616 | : Type(TemplateTypeParm, Canon, /*Dependent=*/true, | ||||||
4617 | /*InstantiationDependent=*/true, | ||||||
4618 | /*VariablyModified=*/false, | ||||||
4619 | Canon->containsUnexpandedParameterPack()), | ||||||
4620 | TTPDecl(TTPDecl) {} | ||||||
4621 | |||||||
4622 | /// Build the canonical type. | ||||||
4623 | TemplateTypeParmType(unsigned D, unsigned I, bool PP) | ||||||
4624 | : Type(TemplateTypeParm, QualType(this, 0), | ||||||
4625 | /*Dependent=*/true, | ||||||
4626 | /*InstantiationDependent=*/true, | ||||||
4627 | /*VariablyModified=*/false, PP) { | ||||||
4628 | CanTTPTInfo.Depth = D; | ||||||
4629 | CanTTPTInfo.Index = I; | ||||||
4630 | CanTTPTInfo.ParameterPack = PP; | ||||||
4631 | } | ||||||
4632 | |||||||
4633 | const CanonicalTTPTInfo& getCanTTPTInfo() const { | ||||||
4634 | QualType Can = getCanonicalTypeInternal(); | ||||||
4635 | return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; | ||||||
4636 | } | ||||||
4637 | |||||||
4638 | public: | ||||||
4639 | unsigned getDepth() const { return getCanTTPTInfo().Depth; } | ||||||
4640 | unsigned getIndex() const { return getCanTTPTInfo().Index; } | ||||||
4641 | bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } | ||||||
4642 | |||||||
4643 | TemplateTypeParmDecl *getDecl() const { | ||||||
4644 | return isCanonicalUnqualified() ? nullptr : TTPDecl; | ||||||
4645 | } | ||||||
4646 | |||||||
4647 | IdentifierInfo *getIdentifier() const; | ||||||
4648 | |||||||
4649 | bool isSugared() const { return false; } | ||||||
4650 | QualType desugar() const { return QualType(this, 0); } | ||||||
4651 | |||||||
4652 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
4653 | Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); | ||||||
4654 | } | ||||||
4655 | |||||||
4656 | static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, | ||||||
4657 | unsigned Index, bool ParameterPack, | ||||||
4658 | TemplateTypeParmDecl *TTPDecl) { | ||||||
4659 | ID.AddInteger(Depth); | ||||||
4660 | ID.AddInteger(Index); | ||||||
4661 | ID.AddBoolean(ParameterPack); | ||||||
4662 | ID.AddPointer(TTPDecl); | ||||||
4663 | } | ||||||
4664 | |||||||
4665 | static bool classof(const Type *T) { | ||||||
4666 | return T->getTypeClass() == TemplateTypeParm; | ||||||
4667 | } | ||||||
4668 | }; | ||||||
4669 | |||||||
4670 | /// Represents the result of substituting a type for a template | ||||||
4671 | /// type parameter. | ||||||
4672 | /// | ||||||
4673 | /// Within an instantiated template, all template type parameters have | ||||||
4674 | /// been replaced with these. They are used solely to record that a | ||||||
4675 | /// type was originally written as a template type parameter; | ||||||
4676 | /// therefore they are never canonical. | ||||||
4677 | class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { | ||||||
4678 | friend class ASTContext; | ||||||
4679 | |||||||
4680 | // The original type parameter. | ||||||
4681 | const TemplateTypeParmType *Replaced; | ||||||
4682 | |||||||
4683 | SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) | ||||||
4684 | : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), | ||||||
4685 | Canon->isInstantiationDependentType(), | ||||||
4686 | Canon->isVariablyModifiedType(), | ||||||
4687 | Canon->containsUnexpandedParameterPack()), | ||||||
4688 | Replaced(Param) {} | ||||||
4689 | |||||||
4690 | public: | ||||||
4691 | /// Gets the template parameter that was substituted for. | ||||||
4692 | const TemplateTypeParmType *getReplacedParameter() const { | ||||||
4693 | return Replaced; | ||||||
4694 | } | ||||||
4695 | |||||||
4696 | /// Gets the type that was substituted for the template | ||||||
4697 | /// parameter. | ||||||
4698 | QualType getReplacementType() const { | ||||||
4699 | return getCanonicalTypeInternal(); | ||||||
4700 | } | ||||||
4701 | |||||||
4702 | bool isSugared() const { return true; } | ||||||
4703 | QualType desugar() const { return getReplacementType(); } | ||||||
4704 | |||||||
4705 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
4706 | Profile(ID, getReplacedParameter(), getReplacementType()); | ||||||
4707 | } | ||||||
4708 | |||||||
4709 | static void Profile(llvm::FoldingSetNodeID &ID, | ||||||
4710 | const TemplateTypeParmType *Replaced, | ||||||
4711 | QualType Replacement) { | ||||||
4712 | ID.AddPointer(Replaced); | ||||||
4713 | ID.AddPointer(Replacement.getAsOpaquePtr()); | ||||||
4714 | } | ||||||
4715 | |||||||
4716 | static bool classof(const Type *T) { | ||||||
4717 | return T->getTypeClass() == SubstTemplateTypeParm; | ||||||
4718 | } | ||||||
4719 | }; | ||||||
4720 | |||||||
4721 | /// Represents the result of substituting a set of types for a template | ||||||
4722 | /// type parameter pack. | ||||||
4723 | /// | ||||||
4724 | /// When a pack expansion in the source code contains multiple parameter packs | ||||||
4725 | /// and those parameter packs correspond to different levels of template | ||||||
4726 | /// parameter lists, this type node is used to represent a template type | ||||||
4727 | /// parameter pack from an outer level, which has already had its argument pack | ||||||
4728 | /// substituted but that still lives within a pack expansion that itself | ||||||
4729 | /// could not be instantiated. When actually performing a substitution into | ||||||
4730 | /// that pack expansion (e.g., when all template parameters have corresponding | ||||||
4731 | /// arguments), this type will be replaced with the \c SubstTemplateTypeParmType | ||||||
4732 | /// at the current pack substitution index. | ||||||
4733 | class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { | ||||||
4734 | friend class ASTContext; | ||||||
4735 | |||||||
4736 | /// The original type parameter. | ||||||
4737 | const TemplateTypeParmType *Replaced; | ||||||
4738 | |||||||
4739 | /// A pointer to the set of template arguments that this | ||||||
4740 | /// parameter pack is instantiated with. | ||||||
4741 | const TemplateArgument *Arguments; | ||||||
4742 | |||||||
4743 | SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, | ||||||
4744 | QualType Canon, | ||||||
4745 | const TemplateArgument &ArgPack); | ||||||
4746 | |||||||
4747 | public: | ||||||
4748 | IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } | ||||||
4749 | |||||||
4750 | /// Gets the template parameter that was substituted for. | ||||||
4751 | const TemplateTypeParmType *getReplacedParameter() const { | ||||||
4752 | return Replaced; | ||||||
4753 | } | ||||||
4754 | |||||||
4755 | unsigned getNumArgs() const { | ||||||
4756 | return SubstTemplateTypeParmPackTypeBits.NumArgs; | ||||||
4757 | } | ||||||
4758 | |||||||
4759 | bool isSugared() const { return false; } | ||||||
4760 | QualType desugar() const { return QualType(this, 0); } | ||||||
4761 | |||||||
4762 | TemplateArgument getArgumentPack() const; | ||||||
4763 | |||||||
4764 | void Profile(llvm::FoldingSetNodeID &ID); | ||||||
4765 | static void Profile(llvm::FoldingSetNodeID &ID, | ||||||
4766 | const TemplateTypeParmType *Replaced, | ||||||
4767 | const TemplateArgument &ArgPack); | ||||||
4768 | |||||||
4769 | static bool classof(const Type *T) { | ||||||
4770 | return T->getTypeClass() == SubstTemplateTypeParmPack; | ||||||
4771 | } | ||||||
4772 | }; | ||||||
4773 | |||||||
4774 | /// Common base class for placeholders for types that get replaced by | ||||||
4775 | /// placeholder type deduction: C++11 auto, C++14 decltype(auto), C++17 deduced | ||||||
4776 | /// class template types, and (eventually) constrained type names from the C++ | ||||||
4777 | /// Concepts TS. | ||||||
4778 | /// | ||||||
4779 | /// These types are usually a placeholder for a deduced type. However, before | ||||||
4780 | /// the initializer is attached, or (usually) if the initializer is | ||||||
4781 | /// type-dependent, there is no deduced type and the type is canonical. In | ||||||
4782 | /// the latter case, it is also a dependent type. | ||||||
4783 | class DeducedType : public Type { | ||||||
4784 | protected: | ||||||
4785 | DeducedType(TypeClass TC, QualType DeducedAsType, bool IsDependent, | ||||||
4786 | bool IsInstantiationDependent, bool ContainsParameterPack) | ||||||
4787 | : Type(TC, | ||||||
4788 | // FIXME: Retain the sugared deduced type? | ||||||
4789 | DeducedAsType.isNull() ? QualType(this, 0) | ||||||
4790 | : DeducedAsType.getCanonicalType(), | ||||||
4791 | IsDependent, IsInstantiationDependent, | ||||||
4792 | /*VariablyModified=*/false, ContainsParameterPack) { | ||||||
4793 | if (!DeducedAsType.isNull()) { | ||||||
4794 | if (DeducedAsType->isDependentType()) | ||||||
4795 | setDependent(); | ||||||
4796 | if (DeducedAsType->isInstantiationDependentType()) | ||||||
4797 | setInstantiationDependent(); | ||||||
4798 | if (DeducedAsType->containsUnexpandedParameterPack()) | ||||||
4799 | setContainsUnexpandedParameterPack(); | ||||||
4800 | } | ||||||
4801 | } | ||||||
4802 | |||||||
4803 | public: | ||||||
4804 | bool isSugared() const { return !isCanonicalUnqualified(); } | ||||||
4805 | QualType desugar() const { return getCanonicalTypeInternal(); } | ||||||
4806 | |||||||
4807 | /// Get the type deduced for this placeholder type, or null if it's | ||||||
4808 | /// either not been deduced or was deduced to a dependent type. | ||||||
4809 | QualType getDeducedType() const { | ||||||
4810 | return !isCanonicalUnqualified() ? getCanonicalTypeInternal() : QualType(); | ||||||
4811 | } | ||||||
4812 | bool isDeduced() const { | ||||||
4813 | return !isCanonicalUnqualified() || isDependentType(); | ||||||
4814 | } | ||||||
4815 | |||||||
4816 | static bool classof(const Type *T) { | ||||||
4817 | return T->getTypeClass() == Auto || | ||||||
4818 | T->getTypeClass() == DeducedTemplateSpecialization; | ||||||
4819 | } | ||||||
4820 | }; | ||||||
4821 | |||||||
4822 | /// Represents a C++11 auto or C++14 decltype(auto) type. | ||||||
4823 | class AutoType : public DeducedType, public llvm::FoldingSetNode { | ||||||
4824 | friend class ASTContext; // ASTContext creates these | ||||||
4825 | |||||||
4826 | AutoType(QualType DeducedAsType, AutoTypeKeyword Keyword, | ||||||
4827 | bool IsDeducedAsDependent, bool IsDeducedAsPack) | ||||||
4828 | : DeducedType(Auto, DeducedAsType, IsDeducedAsDependent, | ||||||
4829 | IsDeducedAsDependent, IsDeducedAsPack) { | ||||||
4830 | AutoTypeBits.Keyword = (unsigned)Keyword; | ||||||
4831 | } | ||||||
4832 | |||||||
4833 | public: | ||||||
4834 | bool isDecltypeAuto() const { | ||||||
4835 | return getKeyword() == AutoTypeKeyword::DecltypeAuto; | ||||||
4836 | } | ||||||
4837 | |||||||
4838 | AutoTypeKeyword getKeyword() const { | ||||||
4839 | return (AutoTypeKeyword)AutoTypeBits.Keyword; | ||||||
4840 | } | ||||||
4841 | |||||||
4842 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
4843 | Profile(ID, getDeducedType(), getKeyword(), isDependentType(), | ||||||
4844 | containsUnexpandedParameterPack()); | ||||||
4845 | } | ||||||
4846 | |||||||
4847 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Deduced, | ||||||
4848 | AutoTypeKeyword Keyword, bool IsDependent, bool IsPack) { | ||||||
4849 | ID.AddPointer(Deduced.getAsOpaquePtr()); | ||||||
4850 | ID.AddInteger((unsigned)Keyword); | ||||||
4851 | ID.AddBoolean(IsDependent); | ||||||
4852 | ID.AddBoolean(IsPack); | ||||||
4853 | } | ||||||
4854 | |||||||
4855 | static bool classof(const Type *T) { | ||||||
4856 | return T->getTypeClass() == Auto; | ||||||
4857 | } | ||||||
4858 | }; | ||||||
4859 | |||||||
4860 | /// Represents a C++17 deduced template specialization type. | ||||||
4861 | class DeducedTemplateSpecializationType : public DeducedType, | ||||||
4862 | public llvm::FoldingSetNode { | ||||||
4863 | friend class ASTContext; // ASTContext creates these | ||||||
4864 | |||||||
4865 | /// The name of the template whose arguments will be deduced. | ||||||
4866 | TemplateName Template; | ||||||
4867 | |||||||
4868 | DeducedTemplateSpecializationType(TemplateName Template, | ||||||
4869 | QualType DeducedAsType, | ||||||
4870 | bool IsDeducedAsDependent) | ||||||
4871 | : DeducedType(DeducedTemplateSpecialization, DeducedAsType, | ||||||
4872 | IsDeducedAsDependent || Template.isDependent(), | ||||||
4873 | IsDeducedAsDependent || Template.isInstantiationDependent(), | ||||||
4874 | Template.containsUnexpandedParameterPack()), | ||||||
4875 | Template(Template) {} | ||||||
4876 | |||||||
4877 | public: | ||||||
4878 | /// Retrieve the name of the template that we are deducing. | ||||||
4879 | TemplateName getTemplateName() const { return Template;} | ||||||
4880 | |||||||
4881 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
4882 | Profile(ID, getTemplateName(), getDeducedType(), isDependentType()); | ||||||
4883 | } | ||||||
4884 | |||||||
4885 | static void Profile(llvm::FoldingSetNodeID &ID, TemplateName Template, | ||||||
4886 | QualType Deduced, bool IsDependent) { | ||||||
4887 | Template.Profile(ID); | ||||||
4888 | ID.AddPointer(Deduced.getAsOpaquePtr()); | ||||||
4889 | ID.AddBoolean(IsDependent); | ||||||
4890 | } | ||||||
4891 | |||||||
4892 | static bool classof(const Type *T) { | ||||||
4893 | return T->getTypeClass() == DeducedTemplateSpecialization; | ||||||
4894 | } | ||||||
4895 | }; | ||||||
4896 | |||||||
4897 | /// Represents a type template specialization; the template | ||||||
4898 | /// must be a class template, a type alias template, or a template | ||||||
4899 | /// template parameter. A template which cannot be resolved to one of | ||||||
4900 | /// these, e.g. because it is written with a dependent scope | ||||||
4901 | /// specifier, is instead represented as a | ||||||
4902 | /// @c DependentTemplateSpecializationType. | ||||||
4903 | /// | ||||||
4904 | /// A non-dependent template specialization type is always "sugar", | ||||||
4905 | /// typically for a \c RecordType. For example, a class template | ||||||
4906 | /// specialization type of \c vector<int> will refer to a tag type for | ||||||
4907 | /// the instantiation \c std::vector<int, std::allocator<int>> | ||||||
4908 | /// | ||||||
4909 | /// Template specializations are dependent if either the template or | ||||||
4910 | /// any of the template arguments are dependent, in which case the | ||||||
4911 | /// type may also be canonical. | ||||||
4912 | /// | ||||||
4913 | /// Instances of this type are allocated with a trailing array of | ||||||
4914 | /// TemplateArguments, followed by a QualType representing the | ||||||
4915 | /// non-canonical aliased type when the template is a type alias | ||||||
4916 | /// template. | ||||||
4917 | class alignas(8) TemplateSpecializationType | ||||||
4918 | : public Type, | ||||||
4919 | public llvm::FoldingSetNode { | ||||||
4920 | friend class ASTContext; // ASTContext creates these | ||||||
4921 | |||||||
4922 | /// The name of the template being specialized. This is | ||||||
4923 | /// either a TemplateName::Template (in which case it is a | ||||||
4924 | /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a | ||||||
4925 | /// TypeAliasTemplateDecl*), a | ||||||
4926 | /// TemplateName::SubstTemplateTemplateParmPack, or a | ||||||
4927 | /// TemplateName::SubstTemplateTemplateParm (in which case the | ||||||
4928 | /// replacement must, recursively, be one of these). | ||||||
4929 | TemplateName Template; | ||||||
4930 | |||||||
4931 | TemplateSpecializationType(TemplateName T, | ||||||
4932 | ArrayRef<TemplateArgument> Args, | ||||||
4933 | QualType Canon, | ||||||
4934 | QualType Aliased); | ||||||
4935 | |||||||
4936 | public: | ||||||
4937 | /// Determine whether any of the given template arguments are dependent. | ||||||
4938 | static bool anyDependentTemplateArguments(ArrayRef<TemplateArgumentLoc> Args, | ||||||
4939 | bool &InstantiationDependent); | ||||||
4940 | |||||||
4941 | static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &, | ||||||
4942 | bool &InstantiationDependent); | ||||||
4943 | |||||||
4944 | /// True if this template specialization type matches a current | ||||||
4945 | /// instantiation in the context in which it is found. | ||||||
4946 | bool isCurrentInstantiation() const { | ||||||
4947 | return isa<InjectedClassNameType>(getCanonicalTypeInternal()); | ||||||
4948 | } | ||||||
4949 | |||||||
4950 | /// Determine if this template specialization type is for a type alias | ||||||
4951 | /// template that has been substituted. | ||||||
4952 | /// | ||||||
4953 | /// Nearly every template specialization type whose template is an alias | ||||||
4954 | /// template will be substituted. However, this is not the case when | ||||||
4955 | /// the specialization contains a pack expansion but the template alias | ||||||
4956 | /// does not have a corresponding parameter pack, e.g., | ||||||
4957 | /// | ||||||
4958 | /// \code | ||||||
4959 | /// template<typename T, typename U, typename V> struct S; | ||||||
4960 | /// template<typename T, typename U> using A = S<T, int, U>; | ||||||
4961 | /// template<typename... Ts> struct X { | ||||||
4962 | /// typedef A<Ts...> type; // not a type alias | ||||||
4963 | /// }; | ||||||
4964 | /// \endcode | ||||||
4965 | bool isTypeAlias() const { return TemplateSpecializationTypeBits.TypeAlias; } | ||||||
4966 | |||||||
4967 | /// Get the aliased type, if this is a specialization of a type alias | ||||||
4968 | /// template. | ||||||
4969 | QualType getAliasedType() const { | ||||||
4970 | assert(isTypeAlias() && "not a type alias template specialization")((isTypeAlias() && "not a type alias template specialization" ) ? static_cast<void> (0) : __assert_fail ("isTypeAlias() && \"not a type alias template specialization\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 4970, __PRETTY_FUNCTION__)); | ||||||
4971 | return *reinterpret_cast<const QualType*>(end()); | ||||||
4972 | } | ||||||
4973 | |||||||
4974 | using iterator = const TemplateArgument *; | ||||||
4975 | |||||||
4976 | iterator begin() const { return getArgs(); } | ||||||
4977 | iterator end() const; // defined inline in TemplateBase.h | ||||||
4978 | |||||||
4979 | /// Retrieve the name of the template that we are specializing. | ||||||
4980 | TemplateName getTemplateName() const { return Template; } | ||||||
4981 | |||||||
4982 | /// Retrieve the template arguments. | ||||||
4983 | const TemplateArgument *getArgs() const { | ||||||
4984 | return reinterpret_cast<const TemplateArgument *>(this + 1); | ||||||
4985 | } | ||||||
4986 | |||||||
4987 | /// Retrieve the number of template arguments. | ||||||
4988 | unsigned getNumArgs() const { | ||||||
4989 | return TemplateSpecializationTypeBits.NumArgs; | ||||||
4990 | } | ||||||
4991 | |||||||
4992 | /// Retrieve a specific template argument as a type. | ||||||
4993 | /// \pre \c isArgType(Arg) | ||||||
4994 | const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h | ||||||
4995 | |||||||
4996 | ArrayRef<TemplateArgument> template_arguments() const { | ||||||
4997 | return {getArgs(), getNumArgs()}; | ||||||
4998 | } | ||||||
4999 | |||||||
5000 | bool isSugared() const { | ||||||
5001 | return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); | ||||||
5002 | } | ||||||
5003 | |||||||
5004 | QualType desugar() const { | ||||||
5005 | return isTypeAlias() ? getAliasedType() : getCanonicalTypeInternal(); | ||||||
5006 | } | ||||||
5007 | |||||||
5008 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { | ||||||
5009 | Profile(ID, Template, template_arguments(), Ctx); | ||||||
5010 | if (isTypeAlias()) | ||||||
5011 | getAliasedType().Profile(ID); | ||||||
5012 | } | ||||||
5013 | |||||||
5014 | static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, | ||||||
5015 | ArrayRef<TemplateArgument> Args, | ||||||
5016 | const ASTContext &Context); | ||||||
5017 | |||||||
5018 | static bool classof(const Type *T) { | ||||||
5019 | return T->getTypeClass() == TemplateSpecialization; | ||||||
5020 | } | ||||||
5021 | }; | ||||||
5022 | |||||||
5023 | /// Print a template argument list, including the '<' and '>' | ||||||
5024 | /// enclosing the template arguments. | ||||||
5025 | void printTemplateArgumentList(raw_ostream &OS, | ||||||
5026 | ArrayRef<TemplateArgument> Args, | ||||||
5027 | const PrintingPolicy &Policy); | ||||||
5028 | |||||||
5029 | void printTemplateArgumentList(raw_ostream &OS, | ||||||
5030 | ArrayRef<TemplateArgumentLoc> Args, | ||||||
5031 | const PrintingPolicy &Policy); | ||||||
5032 | |||||||
5033 | void printTemplateArgumentList(raw_ostream &OS, | ||||||
5034 | const TemplateArgumentListInfo &Args, | ||||||
5035 | const PrintingPolicy &Policy); | ||||||
5036 | |||||||
5037 | /// The injected class name of a C++ class template or class | ||||||
5038 | /// template partial specialization. Used to record that a type was | ||||||
5039 | /// spelled with a bare identifier rather than as a template-id; the | ||||||
5040 | /// equivalent for non-templated classes is just RecordType. | ||||||
5041 | /// | ||||||
5042 | /// Injected class name types are always dependent. Template | ||||||
5043 | /// instantiation turns these into RecordTypes. | ||||||
5044 | /// | ||||||
5045 | /// Injected class name types are always canonical. This works | ||||||
5046 | /// because it is impossible to compare an injected class name type | ||||||
5047 | /// with the corresponding non-injected template type, for the same | ||||||
5048 | /// reason that it is impossible to directly compare template | ||||||
5049 | /// parameters from different dependent contexts: injected class name | ||||||
5050 | /// types can only occur within the scope of a particular templated | ||||||
5051 | /// declaration, and within that scope every template specialization | ||||||
5052 | /// will canonicalize to the injected class name (when appropriate | ||||||
5053 | /// according to the rules of the language). | ||||||
5054 | class InjectedClassNameType : public Type { | ||||||
5055 | friend class ASTContext; // ASTContext creates these. | ||||||
5056 | friend class ASTNodeImporter; | ||||||
5057 | friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not | ||||||
5058 | // currently suitable for AST reading, too much | ||||||
5059 | // interdependencies. | ||||||
5060 | |||||||
5061 | CXXRecordDecl *Decl; | ||||||
5062 | |||||||
5063 | /// The template specialization which this type represents. | ||||||
5064 | /// For example, in | ||||||
5065 | /// template <class T> class A { ... }; | ||||||
5066 | /// this is A<T>, whereas in | ||||||
5067 | /// template <class X, class Y> class A<B<X,Y> > { ... }; | ||||||
5068 | /// this is A<B<X,Y> >. | ||||||
5069 | /// | ||||||
5070 | /// It is always unqualified, always a template specialization type, | ||||||
5071 | /// and always dependent. | ||||||
5072 | QualType InjectedType; | ||||||
5073 | |||||||
5074 | InjectedClassNameType(CXXRecordDecl *D, QualType TST) | ||||||
5075 | : Type(InjectedClassName, QualType(), /*Dependent=*/true, | ||||||
5076 | /*InstantiationDependent=*/true, | ||||||
5077 | /*VariablyModified=*/false, | ||||||
5078 | /*ContainsUnexpandedParameterPack=*/false), | ||||||
5079 | Decl(D), InjectedType(TST) { | ||||||
5080 | assert(isa<TemplateSpecializationType>(TST))((isa<TemplateSpecializationType>(TST)) ? static_cast< void> (0) : __assert_fail ("isa<TemplateSpecializationType>(TST)" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 5080, __PRETTY_FUNCTION__)); | ||||||
5081 | assert(!TST.hasQualifiers())((!TST.hasQualifiers()) ? static_cast<void> (0) : __assert_fail ("!TST.hasQualifiers()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 5081, __PRETTY_FUNCTION__)); | ||||||
5082 | assert(TST->isDependentType())((TST->isDependentType()) ? static_cast<void> (0) : __assert_fail ("TST->isDependentType()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 5082, __PRETTY_FUNCTION__)); | ||||||
5083 | } | ||||||
5084 | |||||||
5085 | public: | ||||||
5086 | QualType getInjectedSpecializationType() const { return InjectedType; } | ||||||
5087 | |||||||
5088 | const TemplateSpecializationType *getInjectedTST() const { | ||||||
5089 | return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); | ||||||
5090 | } | ||||||
5091 | |||||||
5092 | TemplateName getTemplateName() const { | ||||||
5093 | return getInjectedTST()->getTemplateName(); | ||||||
5094 | } | ||||||
5095 | |||||||
5096 | CXXRecordDecl *getDecl() const; | ||||||
5097 | |||||||
5098 | bool isSugared() const { return false; } | ||||||
5099 | QualType desugar() const { return QualType(this, 0); } | ||||||
5100 | |||||||
5101 | static bool classof(const Type *T) { | ||||||
5102 | return T->getTypeClass() == InjectedClassName; | ||||||
5103 | } | ||||||
5104 | }; | ||||||
5105 | |||||||
5106 | /// The kind of a tag type. | ||||||
5107 | enum TagTypeKind { | ||||||
5108 | /// The "struct" keyword. | ||||||
5109 | TTK_Struct, | ||||||
5110 | |||||||
5111 | /// The "__interface" keyword. | ||||||
5112 | TTK_Interface, | ||||||
5113 | |||||||
5114 | /// The "union" keyword. | ||||||
5115 | TTK_Union, | ||||||
5116 | |||||||
5117 | /// The "class" keyword. | ||||||
5118 | TTK_Class, | ||||||
5119 | |||||||
5120 | /// The "enum" keyword. | ||||||
5121 | TTK_Enum | ||||||
5122 | }; | ||||||
5123 | |||||||
5124 | /// The elaboration keyword that precedes a qualified type name or | ||||||
5125 | /// introduces an elaborated-type-specifier. | ||||||
5126 | enum ElaboratedTypeKeyword { | ||||||
5127 | /// The "struct" keyword introduces the elaborated-type-specifier. | ||||||
5128 | ETK_Struct, | ||||||
5129 | |||||||
5130 | /// The "__interface" keyword introduces the elaborated-type-specifier. | ||||||
5131 | ETK_Interface, | ||||||
5132 | |||||||
5133 | /// The "union" keyword introduces the elaborated-type-specifier. | ||||||
5134 | ETK_Union, | ||||||
5135 | |||||||
5136 | /// The "class" keyword introduces the elaborated-type-specifier. | ||||||
5137 | ETK_Class, | ||||||
5138 | |||||||
5139 | /// The "enum" keyword introduces the elaborated-type-specifier. | ||||||
5140 | ETK_Enum, | ||||||
5141 | |||||||
5142 | /// The "typename" keyword precedes the qualified type name, e.g., | ||||||
5143 | /// \c typename T::type. | ||||||
5144 | ETK_Typename, | ||||||
5145 | |||||||
5146 | /// No keyword precedes the qualified type name. | ||||||
5147 | ETK_None | ||||||
5148 | }; | ||||||
5149 | |||||||
5150 | /// A helper class for Type nodes having an ElaboratedTypeKeyword. | ||||||
5151 | /// The keyword in stored in the free bits of the base class. | ||||||
5152 | /// Also provides a few static helpers for converting and printing | ||||||
5153 | /// elaborated type keyword and tag type kind enumerations. | ||||||
5154 | class TypeWithKeyword : public Type { | ||||||
5155 | protected: | ||||||
5156 | TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, | ||||||
5157 | QualType Canonical, bool Dependent, | ||||||
5158 | bool InstantiationDependent, bool VariablyModified, | ||||||
5159 | bool ContainsUnexpandedParameterPack) | ||||||
5160 | : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, | ||||||
5161 | ContainsUnexpandedParameterPack) { | ||||||
5162 | TypeWithKeywordBits.Keyword = Keyword; | ||||||
5163 | } | ||||||
5164 | |||||||
5165 | public: | ||||||
5166 | ElaboratedTypeKeyword getKeyword() const { | ||||||
5167 | return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); | ||||||
5168 | } | ||||||
5169 | |||||||
5170 | /// Converts a type specifier (DeclSpec::TST) into an elaborated type keyword. | ||||||
5171 | static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); | ||||||
5172 | |||||||
5173 | /// Converts a type specifier (DeclSpec::TST) into a tag type kind. | ||||||
5174 | /// It is an error to provide a type specifier which *isn't* a tag kind here. | ||||||
5175 | static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); | ||||||
5176 | |||||||
5177 | /// Converts a TagTypeKind into an elaborated type keyword. | ||||||
5178 | static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); | ||||||
5179 | |||||||
5180 | /// Converts an elaborated type keyword into a TagTypeKind. | ||||||
5181 | /// It is an error to provide an elaborated type keyword | ||||||
5182 | /// which *isn't* a tag kind here. | ||||||
5183 | static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); | ||||||
5184 | |||||||
5185 | static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); | ||||||
5186 | |||||||
5187 | static StringRef getKeywordName(ElaboratedTypeKeyword Keyword); | ||||||
5188 | |||||||
5189 | static StringRef getTagTypeKindName(TagTypeKind Kind) { | ||||||
5190 | return getKeywordName(getKeywordForTagTypeKind(Kind)); | ||||||
5191 | } | ||||||
5192 | |||||||
5193 | class CannotCastToThisType {}; | ||||||
5194 | static CannotCastToThisType classof(const Type *); | ||||||
5195 | }; | ||||||
5196 | |||||||
5197 | /// Represents a type that was referred to using an elaborated type | ||||||
5198 | /// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, | ||||||
5199 | /// or both. | ||||||
5200 | /// | ||||||
5201 | /// This type is used to keep track of a type name as written in the | ||||||
5202 | /// source code, including tag keywords and any nested-name-specifiers. | ||||||
5203 | /// The type itself is always "sugar", used to express what was written | ||||||
5204 | /// in the source code but containing no additional semantic information. | ||||||
5205 | class ElaboratedType final | ||||||
5206 | : public TypeWithKeyword, | ||||||
5207 | public llvm::FoldingSetNode, | ||||||
5208 | private llvm::TrailingObjects<ElaboratedType, TagDecl *> { | ||||||
5209 | friend class ASTContext; // ASTContext creates these | ||||||
5210 | friend TrailingObjects; | ||||||
5211 | |||||||
5212 | /// The nested name specifier containing the qualifier. | ||||||
5213 | NestedNameSpecifier *NNS; | ||||||
5214 | |||||||
5215 | /// The type that this qualified name refers to. | ||||||
5216 | QualType NamedType; | ||||||
5217 | |||||||
5218 | /// The (re)declaration of this tag type owned by this occurrence is stored | ||||||
5219 | /// as a trailing object if there is one. Use getOwnedTagDecl to obtain | ||||||
5220 | /// it, or obtain a null pointer if there is none. | ||||||
5221 | |||||||
5222 | ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, | ||||||
5223 | QualType NamedType, QualType CanonType, TagDecl *OwnedTagDecl) | ||||||
5224 | : TypeWithKeyword(Keyword, Elaborated, CanonType, | ||||||
5225 | NamedType->isDependentType(), | ||||||
5226 | NamedType->isInstantiationDependentType(), | ||||||
5227 | NamedType->isVariablyModifiedType(), | ||||||
5228 | NamedType->containsUnexpandedParameterPack()), | ||||||
5229 | NNS(NNS), NamedType(NamedType) { | ||||||
5230 | ElaboratedTypeBits.HasOwnedTagDecl = false; | ||||||
5231 | if (OwnedTagDecl) { | ||||||
5232 | ElaboratedTypeBits.HasOwnedTagDecl = true; | ||||||
5233 | *getTrailingObjects<TagDecl *>() = OwnedTagDecl; | ||||||
5234 | } | ||||||
5235 | assert(!(Keyword == ETK_None && NNS == nullptr) &&((!(Keyword == ETK_None && NNS == nullptr) && "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null." ) ? static_cast<void> (0) : __assert_fail ("!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 5237, __PRETTY_FUNCTION__)) | ||||||
5236 | "ElaboratedType cannot have elaborated type keyword "((!(Keyword == ETK_None && NNS == nullptr) && "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null." ) ? static_cast<void> (0) : __assert_fail ("!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 5237, __PRETTY_FUNCTION__)) | ||||||
5237 | "and name qualifier both null.")((!(Keyword == ETK_None && NNS == nullptr) && "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null." ) ? static_cast<void> (0) : __assert_fail ("!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 5237, __PRETTY_FUNCTION__)); | ||||||
5238 | } | ||||||
5239 | |||||||
5240 | public: | ||||||
5241 | /// Retrieve the qualification on this type. | ||||||
5242 | NestedNameSpecifier *getQualifier() const { return NNS; } | ||||||
5243 | |||||||
5244 | /// Retrieve the type named by the qualified-id. | ||||||
5245 | QualType getNamedType() const { return NamedType; } | ||||||
5246 | |||||||
5247 | /// Remove a single level of sugar. | ||||||
5248 | QualType desugar() const { return getNamedType(); } | ||||||
5249 | |||||||
5250 | /// Returns whether this type directly provides sugar. | ||||||
5251 | bool isSugared() const { return true; } | ||||||
5252 | |||||||
5253 | /// Return the (re)declaration of this type owned by this occurrence of this | ||||||
5254 | /// type, or nullptr if there is none. | ||||||
5255 | TagDecl *getOwnedTagDecl() const { | ||||||
5256 | return ElaboratedTypeBits.HasOwnedTagDecl ? *getTrailingObjects<TagDecl *>() | ||||||
5257 | : nullptr; | ||||||
5258 | } | ||||||
5259 | |||||||
5260 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
5261 | Profile(ID, getKeyword(), NNS, NamedType, getOwnedTagDecl()); | ||||||
5262 | } | ||||||
5263 | |||||||
5264 | static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, | ||||||
5265 | NestedNameSpecifier *NNS, QualType NamedType, | ||||||
5266 | TagDecl *OwnedTagDecl) { | ||||||
5267 | ID.AddInteger(Keyword); | ||||||
5268 | ID.AddPointer(NNS); | ||||||
5269 | NamedType.Profile(ID); | ||||||
5270 | ID.AddPointer(OwnedTagDecl); | ||||||
5271 | } | ||||||
5272 | |||||||
5273 | static bool classof(const Type *T) { return T->getTypeClass() == Elaborated; } | ||||||
5274 | }; | ||||||
5275 | |||||||
5276 | /// Represents a qualified type name for which the type name is | ||||||
5277 | /// dependent. | ||||||
5278 | /// | ||||||
5279 | /// DependentNameType represents a class of dependent types that involve a | ||||||
5280 | /// possibly dependent nested-name-specifier (e.g., "T::") followed by a | ||||||
5281 | /// name of a type. The DependentNameType may start with a "typename" (for a | ||||||
5282 | /// typename-specifier), "class", "struct", "union", or "enum" (for a | ||||||
5283 | /// dependent elaborated-type-specifier), or nothing (in contexts where we | ||||||
5284 | /// know that we must be referring to a type, e.g., in a base class specifier). | ||||||
5285 | /// Typically the nested-name-specifier is dependent, but in MSVC compatibility | ||||||
5286 | /// mode, this type is used with non-dependent names to delay name lookup until | ||||||
5287 | /// instantiation. | ||||||
5288 | class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { | ||||||
5289 | friend class ASTContext; // ASTContext creates these | ||||||
5290 | |||||||
5291 | /// The nested name specifier containing the qualifier. | ||||||
5292 | NestedNameSpecifier *NNS; | ||||||
5293 | |||||||
5294 | /// The type that this typename specifier refers to. | ||||||
5295 | const IdentifierInfo *Name; | ||||||
5296 | |||||||
5297 | DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, | ||||||
5298 | const IdentifierInfo *Name, QualType CanonType) | ||||||
5299 | : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, | ||||||
5300 | /*InstantiationDependent=*/true, | ||||||
5301 | /*VariablyModified=*/false, | ||||||
5302 | NNS->containsUnexpandedParameterPack()), | ||||||
5303 | NNS(NNS), Name(Name) {} | ||||||
5304 | |||||||
5305 | public: | ||||||
5306 | /// Retrieve the qualification on this type. | ||||||
5307 | NestedNameSpecifier *getQualifier() const { return NNS; } | ||||||
5308 | |||||||
5309 | /// Retrieve the type named by the typename specifier as an identifier. | ||||||
5310 | /// | ||||||
5311 | /// This routine will return a non-NULL identifier pointer when the | ||||||
5312 | /// form of the original typename was terminated by an identifier, | ||||||
5313 | /// e.g., "typename T::type". | ||||||
5314 | const IdentifierInfo *getIdentifier() const { | ||||||
5315 | return Name; | ||||||
5316 | } | ||||||
5317 | |||||||
5318 | bool isSugared() const { return false; } | ||||||
5319 | QualType desugar() const { return QualType(this, 0); } | ||||||
5320 | |||||||
5321 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
5322 | Profile(ID, getKeyword(), NNS, Name); | ||||||
5323 | } | ||||||
5324 | |||||||
5325 | static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, | ||||||
5326 | NestedNameSpecifier *NNS, const IdentifierInfo *Name) { | ||||||
5327 | ID.AddInteger(Keyword); | ||||||
5328 | ID.AddPointer(NNS); | ||||||
5329 | ID.AddPointer(Name); | ||||||
5330 | } | ||||||
5331 | |||||||
5332 | static bool classof(const Type *T) { | ||||||
5333 | return T->getTypeClass() == DependentName; | ||||||
5334 | } | ||||||
5335 | }; | ||||||
5336 | |||||||
5337 | /// Represents a template specialization type whose template cannot be | ||||||
5338 | /// resolved, e.g. | ||||||
5339 | /// A<T>::template B<T> | ||||||
5340 | class alignas(8) DependentTemplateSpecializationType | ||||||
5341 | : public TypeWithKeyword, | ||||||
5342 | public llvm::FoldingSetNode { | ||||||
5343 | friend class ASTContext; // ASTContext creates these | ||||||
5344 | |||||||
5345 | /// The nested name specifier containing the qualifier. | ||||||
5346 | NestedNameSpecifier *NNS; | ||||||
5347 | |||||||
5348 | /// The identifier of the template. | ||||||
5349 | const IdentifierInfo *Name; | ||||||
5350 | |||||||
5351 | DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, | ||||||
5352 | NestedNameSpecifier *NNS, | ||||||
5353 | const IdentifierInfo *Name, | ||||||
5354 | ArrayRef<TemplateArgument> Args, | ||||||
5355 | QualType Canon); | ||||||
5356 | |||||||
5357 | const TemplateArgument *getArgBuffer() const { | ||||||
5358 | return reinterpret_cast<const TemplateArgument*>(this+1); | ||||||
5359 | } | ||||||
5360 | |||||||
5361 | TemplateArgument *getArgBuffer() { | ||||||
5362 | return reinterpret_cast<TemplateArgument*>(this+1); | ||||||
5363 | } | ||||||
5364 | |||||||
5365 | public: | ||||||
5366 | NestedNameSpecifier *getQualifier() const { return NNS; } | ||||||
5367 | const IdentifierInfo *getIdentifier() const { return Name; } | ||||||
5368 | |||||||
5369 | /// Retrieve the template arguments. | ||||||
5370 | const TemplateArgument *getArgs() const { | ||||||
5371 | return getArgBuffer(); | ||||||
5372 | } | ||||||
5373 | |||||||
5374 | /// Retrieve the number of template arguments. | ||||||
5375 | unsigned getNumArgs() const { | ||||||
5376 | return DependentTemplateSpecializationTypeBits.NumArgs; | ||||||
5377 | } | ||||||
5378 | |||||||
5379 | const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h | ||||||
5380 | |||||||
5381 | ArrayRef<TemplateArgument> template_arguments() const { | ||||||
5382 | return {getArgs(), getNumArgs()}; | ||||||
5383 | } | ||||||
5384 | |||||||
5385 | using iterator = const TemplateArgument *; | ||||||
5386 | |||||||
5387 | iterator begin() const { return getArgs(); } | ||||||
5388 | iterator end() const; // inline in TemplateBase.h | ||||||
5389 | |||||||
5390 | bool isSugared() const { return false; } | ||||||
5391 | QualType desugar() const { return QualType(this, 0); } | ||||||
5392 | |||||||
5393 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { | ||||||
5394 | Profile(ID, Context, getKeyword(), NNS, Name, {getArgs(), getNumArgs()}); | ||||||
5395 | } | ||||||
5396 | |||||||
5397 | static void Profile(llvm::FoldingSetNodeID &ID, | ||||||
5398 | const ASTContext &Context, | ||||||
5399 | ElaboratedTypeKeyword Keyword, | ||||||
5400 | NestedNameSpecifier *Qualifier, | ||||||
5401 | const IdentifierInfo *Name, | ||||||
5402 | ArrayRef<TemplateArgument> Args); | ||||||
5403 | |||||||
5404 | static bool classof(const Type *T) { | ||||||
5405 | return T->getTypeClass() == DependentTemplateSpecialization; | ||||||
5406 | } | ||||||
5407 | }; | ||||||
5408 | |||||||
5409 | /// Represents a pack expansion of types. | ||||||
5410 | /// | ||||||
5411 | /// Pack expansions are part of C++11 variadic templates. A pack | ||||||
5412 | /// expansion contains a pattern, which itself contains one or more | ||||||
5413 | /// "unexpanded" parameter packs. When instantiated, a pack expansion | ||||||
5414 | /// produces a series of types, each instantiated from the pattern of | ||||||
5415 | /// the expansion, where the Ith instantiation of the pattern uses the | ||||||
5416 | /// Ith arguments bound to each of the unexpanded parameter packs. The | ||||||
5417 | /// pack expansion is considered to "expand" these unexpanded | ||||||
5418 | /// parameter packs. | ||||||
5419 | /// | ||||||
5420 | /// \code | ||||||
5421 | /// template<typename ...Types> struct tuple; | ||||||
5422 | /// | ||||||
5423 | /// template<typename ...Types> | ||||||
5424 | /// struct tuple_of_references { | ||||||
5425 | /// typedef tuple<Types&...> type; | ||||||
5426 | /// }; | ||||||
5427 | /// \endcode | ||||||
5428 | /// | ||||||
5429 | /// Here, the pack expansion \c Types&... is represented via a | ||||||
5430 | /// PackExpansionType whose pattern is Types&. | ||||||
5431 | class PackExpansionType : public Type, public llvm::FoldingSetNode { | ||||||
5432 | friend class ASTContext; // ASTContext creates these | ||||||
5433 | |||||||
5434 | /// The pattern of the pack expansion. | ||||||
5435 | QualType Pattern; | ||||||
5436 | |||||||
5437 | PackExpansionType(QualType Pattern, QualType Canon, | ||||||
5438 | Optional<unsigned> NumExpansions) | ||||||
5439 | : Type(PackExpansion, Canon, /*Dependent=*/Pattern->isDependentType(), | ||||||
5440 | /*InstantiationDependent=*/true, | ||||||
5441 | /*VariablyModified=*/Pattern->isVariablyModifiedType(), | ||||||
5442 | /*ContainsUnexpandedParameterPack=*/false), | ||||||
5443 | Pattern(Pattern) { | ||||||
5444 | PackExpansionTypeBits.NumExpansions = | ||||||
5445 | NumExpansions ? *NumExpansions + 1 : 0; | ||||||
5446 | } | ||||||
5447 | |||||||
5448 | public: | ||||||
5449 | /// Retrieve the pattern of this pack expansion, which is the | ||||||
5450 | /// type that will be repeatedly instantiated when instantiating the | ||||||
5451 | /// pack expansion itself. | ||||||
5452 | QualType getPattern() const { return Pattern; } | ||||||
5453 | |||||||
5454 | /// Retrieve the number of expansions that this pack expansion will | ||||||
5455 | /// generate, if known. | ||||||
5456 | Optional<unsigned> getNumExpansions() const { | ||||||
5457 | if (PackExpansionTypeBits.NumExpansions) | ||||||
5458 | return PackExpansionTypeBits.NumExpansions - 1; | ||||||
5459 | return None; | ||||||
5460 | } | ||||||
5461 | |||||||
5462 | bool isSugared() const { return !Pattern->isDependentType(); } | ||||||
5463 | QualType desugar() const { return isSugared() ? Pattern : QualType(this, 0); } | ||||||
5464 | |||||||
5465 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
5466 | Profile(ID, getPattern(), getNumExpansions()); | ||||||
5467 | } | ||||||
5468 | |||||||
5469 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, | ||||||
5470 | Optional<unsigned> NumExpansions) { | ||||||
5471 | ID.AddPointer(Pattern.getAsOpaquePtr()); | ||||||
5472 | ID.AddBoolean(NumExpansions.hasValue()); | ||||||
5473 | if (NumExpansions) | ||||||
5474 | ID.AddInteger(*NumExpansions); | ||||||
5475 | } | ||||||
5476 | |||||||
5477 | static bool classof(const Type *T) { | ||||||
5478 | return T->getTypeClass() == PackExpansion; | ||||||
5479 | } | ||||||
5480 | }; | ||||||
5481 | |||||||
5482 | /// This class wraps the list of protocol qualifiers. For types that can | ||||||
5483 | /// take ObjC protocol qualifers, they can subclass this class. | ||||||
5484 | template <class T> | ||||||
5485 | class ObjCProtocolQualifiers { | ||||||
5486 | protected: | ||||||
5487 | ObjCProtocolQualifiers() = default; | ||||||
5488 | |||||||
5489 | ObjCProtocolDecl * const *getProtocolStorage() const { | ||||||
5490 | return const_cast<ObjCProtocolQualifiers*>(this)->getProtocolStorage(); | ||||||
5491 | } | ||||||
5492 | |||||||
5493 | ObjCProtocolDecl **getProtocolStorage() { | ||||||
5494 | return static_cast<T*>(this)->getProtocolStorageImpl(); | ||||||
5495 | } | ||||||
5496 | |||||||
5497 | void setNumProtocols(unsigned N) { | ||||||
5498 | static_cast<T*>(this)->setNumProtocolsImpl(N); | ||||||
5499 | } | ||||||
5500 | |||||||
5501 | void initialize(ArrayRef<ObjCProtocolDecl *> protocols) { | ||||||
5502 | setNumProtocols(protocols.size()); | ||||||
5503 | assert(getNumProtocols() == protocols.size() &&((getNumProtocols() == protocols.size() && "bitfield overflow in protocol count" ) ? static_cast<void> (0) : __assert_fail ("getNumProtocols() == protocols.size() && \"bitfield overflow in protocol count\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 5504, __PRETTY_FUNCTION__)) | ||||||
5504 | "bitfield overflow in protocol count")((getNumProtocols() == protocols.size() && "bitfield overflow in protocol count" ) ? static_cast<void> (0) : __assert_fail ("getNumProtocols() == protocols.size() && \"bitfield overflow in protocol count\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 5504, __PRETTY_FUNCTION__)); | ||||||
5505 | if (!protocols.empty()) | ||||||
5506 | memcpy(getProtocolStorage(), protocols.data(), | ||||||
5507 | protocols.size() * sizeof(ObjCProtocolDecl*)); | ||||||
5508 | } | ||||||
5509 | |||||||
5510 | public: | ||||||
5511 | using qual_iterator = ObjCProtocolDecl * const *; | ||||||
5512 | using qual_range = llvm::iterator_range<qual_iterator>; | ||||||
5513 | |||||||
5514 | qual_range quals() const { return qual_range(qual_begin(), qual_end()); } | ||||||
5515 | qual_iterator qual_begin() const { return getProtocolStorage(); } | ||||||
5516 | qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } | ||||||
5517 | |||||||
5518 | bool qual_empty() const { return getNumProtocols() == 0; } | ||||||
5519 | |||||||
5520 | /// Return the number of qualifying protocols in this type, or 0 if | ||||||
5521 | /// there are none. | ||||||
5522 | unsigned getNumProtocols() const { | ||||||
5523 | return static_cast<const T*>(this)->getNumProtocolsImpl(); | ||||||
5524 | } | ||||||
5525 | |||||||
5526 | /// Fetch a protocol by index. | ||||||
5527 | ObjCProtocolDecl *getProtocol(unsigned I) const { | ||||||
5528 | assert(I < getNumProtocols() && "Out-of-range protocol access")((I < getNumProtocols() && "Out-of-range protocol access" ) ? static_cast<void> (0) : __assert_fail ("I < getNumProtocols() && \"Out-of-range protocol access\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 5528, __PRETTY_FUNCTION__)); | ||||||
5529 | return qual_begin()[I]; | ||||||
5530 | } | ||||||
5531 | |||||||
5532 | /// Retrieve all of the protocol qualifiers. | ||||||
5533 | ArrayRef<ObjCProtocolDecl *> getProtocols() const { | ||||||
5534 | return ArrayRef<ObjCProtocolDecl *>(qual_begin(), getNumProtocols()); | ||||||
5535 | } | ||||||
5536 | }; | ||||||
5537 | |||||||
5538 | /// Represents a type parameter type in Objective C. It can take | ||||||
5539 | /// a list of protocols. | ||||||
5540 | class ObjCTypeParamType : public Type, | ||||||
5541 | public ObjCProtocolQualifiers<ObjCTypeParamType>, | ||||||
5542 | public llvm::FoldingSetNode { | ||||||
5543 | friend class ASTContext; | ||||||
5544 | friend class ObjCProtocolQualifiers<ObjCTypeParamType>; | ||||||
5545 | |||||||
5546 | /// The number of protocols stored on this type. | ||||||
5547 | unsigned NumProtocols : 6; | ||||||
5548 | |||||||
5549 | ObjCTypeParamDecl *OTPDecl; | ||||||
5550 | |||||||
5551 | /// The protocols are stored after the ObjCTypeParamType node. In the | ||||||
5552 | /// canonical type, the list of protocols are sorted alphabetically | ||||||
5553 | /// and uniqued. | ||||||
5554 | ObjCProtocolDecl **getProtocolStorageImpl(); | ||||||
5555 | |||||||
5556 | /// Return the number of qualifying protocols in this interface type, | ||||||
5557 | /// or 0 if there are none. | ||||||
5558 | unsigned getNumProtocolsImpl() const { | ||||||
5559 | return NumProtocols; | ||||||
5560 | } | ||||||
5561 | |||||||
5562 | void setNumProtocolsImpl(unsigned N) { | ||||||
5563 | NumProtocols = N; | ||||||
5564 | } | ||||||
5565 | |||||||
5566 | ObjCTypeParamType(const ObjCTypeParamDecl *D, | ||||||
5567 | QualType can, | ||||||
5568 | ArrayRef<ObjCProtocolDecl *> protocols); | ||||||
5569 | |||||||
5570 | public: | ||||||
5571 | bool isSugared() const { return true; } | ||||||
5572 | QualType desugar() const { return getCanonicalTypeInternal(); } | ||||||
5573 | |||||||
5574 | static bool classof(const Type *T) { | ||||||
5575 | return T->getTypeClass() == ObjCTypeParam; | ||||||
5576 | } | ||||||
5577 | |||||||
5578 | void Profile(llvm::FoldingSetNodeID &ID); | ||||||
5579 | static void Profile(llvm::FoldingSetNodeID &ID, | ||||||
5580 | const ObjCTypeParamDecl *OTPDecl, | ||||||
5581 | ArrayRef<ObjCProtocolDecl *> protocols); | ||||||
5582 | |||||||
5583 | ObjCTypeParamDecl *getDecl() const { return OTPDecl; } | ||||||
5584 | }; | ||||||
5585 | |||||||
5586 | /// Represents a class type in Objective C. | ||||||
5587 | /// | ||||||
5588 | /// Every Objective C type is a combination of a base type, a set of | ||||||
5589 | /// type arguments (optional, for parameterized classes) and a list of | ||||||
5590 | /// protocols. | ||||||
5591 | /// | ||||||
5592 | /// Given the following declarations: | ||||||
5593 | /// \code | ||||||
5594 | /// \@class C<T>; | ||||||
5595 | /// \@protocol P; | ||||||
5596 | /// \endcode | ||||||
5597 | /// | ||||||
5598 | /// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType | ||||||
5599 | /// with base C and no protocols. | ||||||
5600 | /// | ||||||
5601 | /// 'C<P>' is an unspecialized ObjCObjectType with base C and protocol list [P]. | ||||||
5602 | /// 'C<C*>' is a specialized ObjCObjectType with type arguments 'C*' and no | ||||||
5603 | /// protocol list. | ||||||
5604 | /// 'C<C*><P>' is a specialized ObjCObjectType with base C, type arguments 'C*', | ||||||
5605 | /// and protocol list [P]. | ||||||
5606 | /// | ||||||
5607 | /// 'id' is a TypedefType which is sugar for an ObjCObjectPointerType whose | ||||||
5608 | /// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType | ||||||
5609 | /// and no protocols. | ||||||
5610 | /// | ||||||
5611 | /// 'id<P>' is an ObjCObjectPointerType whose pointee is an ObjCObjectType | ||||||
5612 | /// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually | ||||||
5613 | /// this should get its own sugar class to better represent the source. | ||||||
5614 | class ObjCObjectType : public Type, | ||||||
5615 | public ObjCProtocolQualifiers<ObjCObjectType> { | ||||||
5616 | friend class ObjCProtocolQualifiers<ObjCObjectType>; | ||||||
5617 | |||||||
5618 | // ObjCObjectType.NumTypeArgs - the number of type arguments stored | ||||||
5619 | // after the ObjCObjectPointerType node. | ||||||
5620 | // ObjCObjectType.NumProtocols - the number of protocols stored | ||||||
5621 | // after the type arguments of ObjCObjectPointerType node. | ||||||
5622 | // | ||||||
5623 | // These protocols are those written directly on the type. If | ||||||
5624 | // protocol qualifiers ever become additive, the iterators will need | ||||||
5625 | // to get kindof complicated. | ||||||
5626 | // | ||||||
5627 | // In the canonical object type, these are sorted alphabetically | ||||||
5628 | // and uniqued. | ||||||
5629 | |||||||
5630 | /// Either a BuiltinType or an InterfaceType or sugar for either. | ||||||
5631 | QualType BaseType; | ||||||
5632 | |||||||
5633 | /// Cached superclass type. | ||||||
5634 | mutable llvm::PointerIntPair<const ObjCObjectType *, 1, bool> | ||||||
5635 | CachedSuperClassType; | ||||||
5636 | |||||||
5637 | QualType *getTypeArgStorage(); | ||||||
5638 | const QualType *getTypeArgStorage() const { | ||||||
5639 | return const_cast<ObjCObjectType *>(this)->getTypeArgStorage(); | ||||||
5640 | } | ||||||
5641 | |||||||
5642 | ObjCProtocolDecl **getProtocolStorageImpl(); | ||||||
5643 | /// Return the number of qualifying protocols in this interface type, | ||||||
5644 | /// or 0 if there are none. | ||||||
5645 | unsigned getNumProtocolsImpl() const { | ||||||
5646 | return ObjCObjectTypeBits.NumProtocols; | ||||||
5647 | } | ||||||
5648 | void setNumProtocolsImpl(unsigned N) { | ||||||
5649 | ObjCObjectTypeBits.NumProtocols = N; | ||||||
5650 | } | ||||||
5651 | |||||||
5652 | protected: | ||||||
5653 | enum Nonce_ObjCInterface { Nonce_ObjCInterface }; | ||||||
5654 | |||||||
5655 | ObjCObjectType(QualType Canonical, QualType Base, | ||||||
5656 | ArrayRef<QualType> typeArgs, | ||||||
5657 | ArrayRef<ObjCProtocolDecl *> protocols, | ||||||
5658 | bool isKindOf); | ||||||
5659 | |||||||
5660 | ObjCObjectType(enum Nonce_ObjCInterface) | ||||||
5661 | : Type(ObjCInterface, QualType(), false, false, false, false), | ||||||
5662 | BaseType(QualType(this_(), 0)) { | ||||||
5663 | ObjCObjectTypeBits.NumProtocols = 0; | ||||||
5664 | ObjCObjectTypeBits.NumTypeArgs = 0; | ||||||
5665 | ObjCObjectTypeBits.IsKindOf = 0; | ||||||
5666 | } | ||||||
5667 | |||||||
5668 | void computeSuperClassTypeSlow() const; | ||||||
5669 | |||||||
5670 | public: | ||||||
5671 | /// Gets the base type of this object type. This is always (possibly | ||||||
5672 | /// sugar for) one of: | ||||||
5673 | /// - the 'id' builtin type (as opposed to the 'id' type visible to the | ||||||
5674 | /// user, which is a typedef for an ObjCObjectPointerType) | ||||||
5675 | /// - the 'Class' builtin type (same caveat) | ||||||
5676 | /// - an ObjCObjectType (currently always an ObjCInterfaceType) | ||||||
5677 | QualType getBaseType() const { return BaseType; } | ||||||
5678 | |||||||
5679 | bool isObjCId() const { | ||||||
5680 | return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); | ||||||
5681 | } | ||||||
5682 | |||||||
5683 | bool isObjCClass() const { | ||||||
5684 | return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); | ||||||
5685 | } | ||||||
5686 | |||||||
5687 | bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } | ||||||
5688 | bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } | ||||||
5689 | bool isObjCUnqualifiedIdOrClass() const { | ||||||
5690 | if (!qual_empty()) return false; | ||||||
5691 | if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) | ||||||
5692 | return T->getKind() == BuiltinType::ObjCId || | ||||||
5693 | T->getKind() == BuiltinType::ObjCClass; | ||||||
5694 | return false; | ||||||
5695 | } | ||||||
5696 | bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } | ||||||
5697 | bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } | ||||||
5698 | |||||||
5699 | /// Gets the interface declaration for this object type, if the base type | ||||||
5700 | /// really is an interface. | ||||||
5701 | ObjCInterfaceDecl *getInterface() const; | ||||||
5702 | |||||||
5703 | /// Determine whether this object type is "specialized", meaning | ||||||
5704 | /// that it has type arguments. | ||||||
5705 | bool isSpecialized() const; | ||||||
5706 | |||||||
5707 | /// Determine whether this object type was written with type arguments. | ||||||
5708 | bool isSpecializedAsWritten() const { | ||||||
5709 | return ObjCObjectTypeBits.NumTypeArgs > 0; | ||||||
5710 | } | ||||||
5711 | |||||||
5712 | /// Determine whether this object type is "unspecialized", meaning | ||||||
5713 | /// that it has no type arguments. | ||||||
5714 | bool isUnspecialized() const { return !isSpecialized(); } | ||||||
5715 | |||||||
5716 | /// Determine whether this object type is "unspecialized" as | ||||||
5717 | /// written, meaning that it has no type arguments. | ||||||
5718 | bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); } | ||||||
5719 | |||||||
5720 | /// Retrieve the type arguments of this object type (semantically). | ||||||
5721 | ArrayRef<QualType> getTypeArgs() const; | ||||||
5722 | |||||||
5723 | /// Retrieve the type arguments of this object type as they were | ||||||
5724 | /// written. | ||||||
5725 | ArrayRef<QualType> getTypeArgsAsWritten() const { | ||||||
5726 | return llvm::makeArrayRef(getTypeArgStorage(), | ||||||
5727 | ObjCObjectTypeBits.NumTypeArgs); | ||||||
5728 | } | ||||||
5729 | |||||||
5730 | /// Whether this is a "__kindof" type as written. | ||||||
5731 | bool isKindOfTypeAsWritten() const { return ObjCObjectTypeBits.IsKindOf; } | ||||||
5732 | |||||||
5733 | /// Whether this ia a "__kindof" type (semantically). | ||||||
5734 | bool isKindOfType() const; | ||||||
5735 | |||||||
5736 | /// Retrieve the type of the superclass of this object type. | ||||||
5737 | /// | ||||||
5738 | /// This operation substitutes any type arguments into the | ||||||
5739 | /// superclass of the current class type, potentially producing a | ||||||
5740 | /// specialization of the superclass type. Produces a null type if | ||||||
5741 | /// there is no superclass. | ||||||
5742 | QualType getSuperClassType() const { | ||||||
5743 | if (!CachedSuperClassType.getInt()) | ||||||
5744 | computeSuperClassTypeSlow(); | ||||||
5745 | |||||||
5746 | assert(CachedSuperClassType.getInt() && "Superclass not set?")((CachedSuperClassType.getInt() && "Superclass not set?" ) ? static_cast<void> (0) : __assert_fail ("CachedSuperClassType.getInt() && \"Superclass not set?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 5746, __PRETTY_FUNCTION__)); | ||||||
5747 | return QualType(CachedSuperClassType.getPointer(), 0); | ||||||
5748 | } | ||||||
5749 | |||||||
5750 | /// Strip off the Objective-C "kindof" type and (with it) any | ||||||
5751 | /// protocol qualifiers. | ||||||
5752 | QualType stripObjCKindOfTypeAndQuals(const ASTContext &ctx) const; | ||||||
5753 | |||||||
5754 | bool isSugared() const { return false; } | ||||||
5755 | QualType desugar() const { return QualType(this, 0); } | ||||||
5756 | |||||||
5757 | static bool classof(const Type *T) { | ||||||
5758 | return T->getTypeClass() == ObjCObject || | ||||||
5759 | T->getTypeClass() == ObjCInterface; | ||||||
5760 | } | ||||||
5761 | }; | ||||||
5762 | |||||||
5763 | /// A class providing a concrete implementation | ||||||
5764 | /// of ObjCObjectType, so as to not increase the footprint of | ||||||
5765 | /// ObjCInterfaceType. Code outside of ASTContext and the core type | ||||||
5766 | /// system should not reference this type. | ||||||
5767 | class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { | ||||||
5768 | friend class ASTContext; | ||||||
5769 | |||||||
5770 | // If anyone adds fields here, ObjCObjectType::getProtocolStorage() | ||||||
5771 | // will need to be modified. | ||||||
5772 | |||||||
5773 | ObjCObjectTypeImpl(QualType Canonical, QualType Base, | ||||||
5774 | ArrayRef<QualType> typeArgs, | ||||||
5775 | ArrayRef<ObjCProtocolDecl *> protocols, | ||||||
5776 | bool isKindOf) | ||||||
5777 | : ObjCObjectType(Canonical, Base, typeArgs, protocols, isKindOf) {} | ||||||
5778 | |||||||
5779 | public: | ||||||
5780 | void Profile(llvm::FoldingSetNodeID &ID); | ||||||
5781 | static void Profile(llvm::FoldingSetNodeID &ID, | ||||||
5782 | QualType Base, | ||||||
5783 | ArrayRef<QualType> typeArgs, | ||||||
5784 | ArrayRef<ObjCProtocolDecl *> protocols, | ||||||
5785 | bool isKindOf); | ||||||
5786 | }; | ||||||
5787 | |||||||
5788 | inline QualType *ObjCObjectType::getTypeArgStorage() { | ||||||
5789 | return reinterpret_cast<QualType *>(static_cast<ObjCObjectTypeImpl*>(this)+1); | ||||||
5790 | } | ||||||
5791 | |||||||
5792 | inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorageImpl() { | ||||||
5793 | return reinterpret_cast<ObjCProtocolDecl**>( | ||||||
5794 | getTypeArgStorage() + ObjCObjectTypeBits.NumTypeArgs); | ||||||
5795 | } | ||||||
5796 | |||||||
5797 | inline ObjCProtocolDecl **ObjCTypeParamType::getProtocolStorageImpl() { | ||||||
5798 | return reinterpret_cast<ObjCProtocolDecl**>( | ||||||
5799 | static_cast<ObjCTypeParamType*>(this)+1); | ||||||
5800 | } | ||||||
5801 | |||||||
5802 | /// Interfaces are the core concept in Objective-C for object oriented design. | ||||||
5803 | /// They basically correspond to C++ classes. There are two kinds of interface | ||||||
5804 | /// types: normal interfaces like `NSString`, and qualified interfaces, which | ||||||
5805 | /// are qualified with a protocol list like `NSString<NSCopyable, NSAmazing>`. | ||||||
5806 | /// | ||||||
5807 | /// ObjCInterfaceType guarantees the following properties when considered | ||||||
5808 | /// as a subtype of its superclass, ObjCObjectType: | ||||||
5809 | /// - There are no protocol qualifiers. To reinforce this, code which | ||||||
5810 | /// tries to invoke the protocol methods via an ObjCInterfaceType will | ||||||
5811 | /// fail to compile. | ||||||
5812 | /// - It is its own base type. That is, if T is an ObjCInterfaceType*, | ||||||
5813 | /// T->getBaseType() == QualType(T, 0). | ||||||
5814 | class ObjCInterfaceType : public ObjCObjectType { | ||||||
5815 | friend class ASTContext; // ASTContext creates these. | ||||||
5816 | friend class ASTReader; | ||||||
5817 | friend class ObjCInterfaceDecl; | ||||||
5818 | |||||||
5819 | mutable ObjCInterfaceDecl *Decl; | ||||||
5820 | |||||||
5821 | ObjCInterfaceType(const ObjCInterfaceDecl *D) | ||||||
5822 | : ObjCObjectType(Nonce_ObjCInterface), | ||||||
5823 | Decl(const_cast<ObjCInterfaceDecl*>(D)) {} | ||||||
5824 | |||||||
5825 | public: | ||||||
5826 | /// Get the declaration of this interface. | ||||||
5827 | ObjCInterfaceDecl *getDecl() const { return Decl; } | ||||||
5828 | |||||||
5829 | bool isSugared() const { return false; } | ||||||
5830 | QualType desugar() const { return QualType(this, 0); } | ||||||
5831 | |||||||
5832 | static bool classof(const Type *T) { | ||||||
5833 | return T->getTypeClass() == ObjCInterface; | ||||||
5834 | } | ||||||
5835 | |||||||
5836 | // Nonsense to "hide" certain members of ObjCObjectType within this | ||||||
5837 | // class. People asking for protocols on an ObjCInterfaceType are | ||||||
5838 | // not going to get what they want: ObjCInterfaceTypes are | ||||||
5839 | // guaranteed to have no protocols. | ||||||
5840 | enum { | ||||||
5841 | qual_iterator, | ||||||
5842 | qual_begin, | ||||||
5843 | qual_end, | ||||||
5844 | getNumProtocols, | ||||||
5845 | getProtocol | ||||||
5846 | }; | ||||||
5847 | }; | ||||||
5848 | |||||||
5849 | inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { | ||||||
5850 | QualType baseType = getBaseType(); | ||||||
5851 | while (const auto *ObjT = baseType->getAs<ObjCObjectType>()) { | ||||||
5852 | if (const auto *T = dyn_cast<ObjCInterfaceType>(ObjT)) | ||||||
5853 | return T->getDecl(); | ||||||
5854 | |||||||
5855 | baseType = ObjT->getBaseType(); | ||||||
5856 | } | ||||||
5857 | |||||||
5858 | return nullptr; | ||||||
5859 | } | ||||||
5860 | |||||||
5861 | /// Represents a pointer to an Objective C object. | ||||||
5862 | /// | ||||||
5863 | /// These are constructed from pointer declarators when the pointee type is | ||||||
5864 | /// an ObjCObjectType (or sugar for one). In addition, the 'id' and 'Class' | ||||||
5865 | /// types are typedefs for these, and the protocol-qualified types 'id<P>' | ||||||
5866 | /// and 'Class<P>' are translated into these. | ||||||
5867 | /// | ||||||
5868 | /// Pointers to pointers to Objective C objects are still PointerTypes; | ||||||
5869 | /// only the first level of pointer gets it own type implementation. | ||||||
5870 | class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { | ||||||
5871 | friend class ASTContext; // ASTContext creates these. | ||||||
5872 | |||||||
5873 | QualType PointeeType; | ||||||
5874 | |||||||
5875 | ObjCObjectPointerType(QualType Canonical, QualType Pointee) | ||||||
5876 | : Type(ObjCObjectPointer, Canonical, | ||||||
5877 | Pointee->isDependentType(), | ||||||
5878 | Pointee->isInstantiationDependentType(), | ||||||
5879 | Pointee->isVariablyModifiedType(), | ||||||
5880 | Pointee->containsUnexpandedParameterPack()), | ||||||
5881 | PointeeType(Pointee) {} | ||||||
5882 | |||||||
5883 | public: | ||||||
5884 | /// Gets the type pointed to by this ObjC pointer. | ||||||
5885 | /// The result will always be an ObjCObjectType or sugar thereof. | ||||||
5886 | QualType getPointeeType() const { return PointeeType; } | ||||||
5887 | |||||||
5888 | /// Gets the type pointed to by this ObjC pointer. Always returns non-null. | ||||||
5889 | /// | ||||||
5890 | /// This method is equivalent to getPointeeType() except that | ||||||
5891 | /// it discards any typedefs (or other sugar) between this | ||||||
5892 | /// type and the "outermost" object type. So for: | ||||||
5893 | /// \code | ||||||
5894 | /// \@class A; \@protocol P; \@protocol Q; | ||||||
5895 | /// typedef A<P> AP; | ||||||
5896 | /// typedef A A1; | ||||||
5897 | /// typedef A1<P> A1P; | ||||||
5898 | /// typedef A1P<Q> A1PQ; | ||||||
5899 | /// \endcode | ||||||
5900 | /// For 'A*', getObjectType() will return 'A'. | ||||||
5901 | /// For 'A<P>*', getObjectType() will return 'A<P>'. | ||||||
5902 | /// For 'AP*', getObjectType() will return 'A<P>'. | ||||||
5903 | /// For 'A1*', getObjectType() will return 'A'. | ||||||
5904 | /// For 'A1<P>*', getObjectType() will return 'A1<P>'. | ||||||
5905 | /// For 'A1P*', getObjectType() will return 'A1<P>'. | ||||||
5906 | /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because | ||||||
5907 | /// adding protocols to a protocol-qualified base discards the | ||||||
5908 | /// old qualifiers (for now). But if it didn't, getObjectType() | ||||||
5909 | /// would return 'A1P<Q>' (and we'd have to make iterating over | ||||||
5910 | /// qualifiers more complicated). | ||||||
5911 | const ObjCObjectType *getObjectType() const { | ||||||
5912 | return PointeeType->castAs<ObjCObjectType>(); | ||||||
5913 | } | ||||||
5914 | |||||||
5915 | /// If this pointer points to an Objective C | ||||||
5916 | /// \@interface type, gets the type for that interface. Any protocol | ||||||
5917 | /// qualifiers on the interface are ignored. | ||||||
5918 | /// | ||||||
5919 | /// \return null if the base type for this pointer is 'id' or 'Class' | ||||||
5920 | const ObjCInterfaceType *getInterfaceType() const; | ||||||
5921 | |||||||
5922 | /// If this pointer points to an Objective \@interface | ||||||
5923 | /// type, gets the declaration for that interface. | ||||||
5924 | /// | ||||||
5925 | /// \return null if the base type for this pointer is 'id' or 'Class' | ||||||
5926 | ObjCInterfaceDecl *getInterfaceDecl() const { | ||||||
5927 | return getObjectType()->getInterface(); | ||||||
5928 | } | ||||||
5929 | |||||||
5930 | /// True if this is equivalent to the 'id' type, i.e. if | ||||||
5931 | /// its object type is the primitive 'id' type with no protocols. | ||||||
5932 | bool isObjCIdType() const { | ||||||
5933 | return getObjectType()->isObjCUnqualifiedId(); | ||||||
5934 | } | ||||||
5935 | |||||||
5936 | /// True if this is equivalent to the 'Class' type, | ||||||
5937 | /// i.e. if its object tive is the primitive 'Class' type with no protocols. | ||||||
5938 | bool isObjCClassType() const { | ||||||
5939 | return getObjectType()->isObjCUnqualifiedClass(); | ||||||
5940 | } | ||||||
5941 | |||||||
5942 | /// True if this is equivalent to the 'id' or 'Class' type, | ||||||
5943 | bool isObjCIdOrClassType() const { | ||||||
5944 | return getObjectType()->isObjCUnqualifiedIdOrClass(); | ||||||
5945 | } | ||||||
5946 | |||||||
5947 | /// True if this is equivalent to 'id<P>' for some non-empty set of | ||||||
5948 | /// protocols. | ||||||
5949 | bool isObjCQualifiedIdType() const { | ||||||
5950 | return getObjectType()->isObjCQualifiedId(); | ||||||
5951 | } | ||||||
5952 | |||||||
5953 | /// True if this is equivalent to 'Class<P>' for some non-empty set of | ||||||
5954 | /// protocols. | ||||||
5955 | bool isObjCQualifiedClassType() const { | ||||||
5956 | return getObjectType()->isObjCQualifiedClass(); | ||||||
5957 | } | ||||||
5958 | |||||||
5959 | /// Whether this is a "__kindof" type. | ||||||
5960 | bool isKindOfType() const { return getObjectType()->isKindOfType(); } | ||||||
5961 | |||||||
5962 | /// Whether this type is specialized, meaning that it has type arguments. | ||||||
5963 | bool isSpecialized() const { return getObjectType()->isSpecialized(); } | ||||||
5964 | |||||||
5965 | /// Whether this type is specialized, meaning that it has type arguments. | ||||||
5966 | bool isSpecializedAsWritten() const { | ||||||
5967 | return getObjectType()->isSpecializedAsWritten(); | ||||||
5968 | } | ||||||
5969 | |||||||
5970 | /// Whether this type is unspecialized, meaning that is has no type arguments. | ||||||
5971 | bool isUnspecialized() const { return getObjectType()->isUnspecialized(); } | ||||||
5972 | |||||||
5973 | /// Determine whether this object type is "unspecialized" as | ||||||
5974 | /// written, meaning that it has no type arguments. | ||||||
5975 | bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); } | ||||||
5976 | |||||||
5977 | /// Retrieve the type arguments for this type. | ||||||
5978 | ArrayRef<QualType> getTypeArgs() const { | ||||||
5979 | return getObjectType()->getTypeArgs(); | ||||||
5980 | } | ||||||
5981 | |||||||
5982 | /// Retrieve the type arguments for this type. | ||||||
5983 | ArrayRef<QualType> getTypeArgsAsWritten() const { | ||||||
5984 | return getObjectType()->getTypeArgsAsWritten(); | ||||||
5985 | } | ||||||
5986 | |||||||
5987 | /// An iterator over the qualifiers on the object type. Provided | ||||||
5988 | /// for convenience. This will always iterate over the full set of | ||||||
5989 | /// protocols on a type, not just those provided directly. | ||||||
5990 | using qual_iterator = ObjCObjectType::qual_iterator; | ||||||
5991 | using qual_range = llvm::iterator_range<qual_iterator>; | ||||||
5992 | |||||||
5993 | qual_range quals() const { return qual_range(qual_begin(), qual_end()); } | ||||||
5994 | |||||||
5995 | qual_iterator qual_begin() const { | ||||||
5996 | return getObjectType()->qual_begin(); | ||||||
5997 | } | ||||||
5998 | |||||||
5999 | qual_iterator qual_end() const { | ||||||
6000 | return getObjectType()->qual_end(); | ||||||
6001 | } | ||||||
6002 | |||||||
6003 | bool qual_empty() const { return getObjectType()->qual_empty(); } | ||||||
6004 | |||||||
6005 | /// Return the number of qualifying protocols on the object type. | ||||||
6006 | unsigned getNumProtocols() const { | ||||||
6007 | return getObjectType()->getNumProtocols(); | ||||||
6008 | } | ||||||
6009 | |||||||
6010 | /// Retrieve a qualifying protocol by index on the object type. | ||||||
6011 | ObjCProtocolDecl *getProtocol(unsigned I) const { | ||||||
6012 | return getObjectType()->getProtocol(I); | ||||||
6013 | } | ||||||
6014 | |||||||
6015 | bool isSugared() const { return false; } | ||||||
6016 | QualType desugar() const { return QualType(this, 0); } | ||||||
6017 | |||||||
6018 | /// Retrieve the type of the superclass of this object pointer type. | ||||||
6019 | /// | ||||||
6020 | /// This operation substitutes any type arguments into the | ||||||
6021 | /// superclass of the current class type, potentially producing a | ||||||
6022 | /// pointer to a specialization of the superclass type. Produces a | ||||||
6023 | /// null type if there is no superclass. | ||||||
6024 | QualType getSuperClassType() const; | ||||||
6025 | |||||||
6026 | /// Strip off the Objective-C "kindof" type and (with it) any | ||||||
6027 | /// protocol qualifiers. | ||||||
6028 | const ObjCObjectPointerType *stripObjCKindOfTypeAndQuals( | ||||||
6029 | const ASTContext &ctx) const; | ||||||
6030 | |||||||
6031 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
6032 | Profile(ID, getPointeeType()); | ||||||
6033 | } | ||||||
6034 | |||||||
6035 | static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { | ||||||
6036 | ID.AddPointer(T.getAsOpaquePtr()); | ||||||
6037 | } | ||||||
6038 | |||||||
6039 | static bool classof(const Type *T) { | ||||||
6040 | return T->getTypeClass() == ObjCObjectPointer; | ||||||
6041 | } | ||||||
6042 | }; | ||||||
6043 | |||||||
6044 | class AtomicType : public Type, public llvm::FoldingSetNode { | ||||||
6045 | friend class ASTContext; // ASTContext creates these. | ||||||
6046 | |||||||
6047 | QualType ValueType; | ||||||
6048 | |||||||
6049 | AtomicType(QualType ValTy, QualType Canonical) | ||||||
6050 | : Type(Atomic, Canonical, ValTy->isDependentType(), | ||||||
6051 | ValTy->isInstantiationDependentType(), | ||||||
6052 | ValTy->isVariablyModifiedType(), | ||||||
6053 | ValTy->containsUnexpandedParameterPack()), | ||||||
6054 | ValueType(ValTy) {} | ||||||
6055 | |||||||
6056 | public: | ||||||
6057 | /// Gets the type contained by this atomic type, i.e. | ||||||
6058 | /// the type returned by performing an atomic load of this atomic type. | ||||||
6059 | QualType getValueType() const { return ValueType; } | ||||||
6060 | |||||||
6061 | bool isSugared() const { return false; } | ||||||
6062 | QualType desugar() const { return QualType(this, 0); } | ||||||
6063 | |||||||
6064 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
6065 | Profile(ID, getValueType()); | ||||||
6066 | } | ||||||
6067 | |||||||
6068 | static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { | ||||||
6069 | ID.AddPointer(T.getAsOpaquePtr()); | ||||||
6070 | } | ||||||
6071 | |||||||
6072 | static bool classof(const Type *T) { | ||||||
6073 | return T->getTypeClass() == Atomic; | ||||||
6074 | } | ||||||
6075 | }; | ||||||
6076 | |||||||
6077 | /// PipeType - OpenCL20. | ||||||
6078 | class PipeType : public Type, public llvm::FoldingSetNode { | ||||||
6079 | friend class ASTContext; // ASTContext creates these. | ||||||
6080 | |||||||
6081 | QualType ElementType; | ||||||
6082 | bool isRead; | ||||||
6083 | |||||||
6084 | PipeType(QualType elemType, QualType CanonicalPtr, bool isRead) | ||||||
6085 | : Type(Pipe, CanonicalPtr, elemType->isDependentType(), | ||||||
6086 | elemType->isInstantiationDependentType(), | ||||||
6087 | elemType->isVariablyModifiedType(), | ||||||
6088 | elemType->containsUnexpandedParameterPack()), | ||||||
6089 | ElementType(elemType), isRead(isRead) {} | ||||||
6090 | |||||||
6091 | public: | ||||||
6092 | QualType getElementType() const { return ElementType; } | ||||||
6093 | |||||||
6094 | bool isSugared() const { return false; } | ||||||
6095 | |||||||
6096 | QualType desugar() const { return QualType(this, 0); } | ||||||
6097 | |||||||
6098 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||
6099 | Profile(ID, getElementType(), isReadOnly()); | ||||||
6100 | } | ||||||
6101 | |||||||
6102 | static void Profile(llvm::FoldingSetNodeID &ID, QualType T, bool isRead) { | ||||||
6103 | ID.AddPointer(T.getAsOpaquePtr()); | ||||||
6104 | ID.AddBoolean(isRead); | ||||||
6105 | } | ||||||
6106 | |||||||
6107 | static bool classof(const Type *T) { | ||||||
6108 | return T->getTypeClass() == Pipe; | ||||||
6109 | } | ||||||
6110 | |||||||
6111 | bool isReadOnly() const { return isRead; } | ||||||
6112 | }; | ||||||
6113 | |||||||
6114 | /// A qualifier set is used to build a set of qualifiers. | ||||||
6115 | class QualifierCollector : public Qualifiers { | ||||||
6116 | public: | ||||||
6117 | QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} | ||||||
6118 | |||||||
6119 | /// Collect any qualifiers on the given type and return an | ||||||
6120 | /// unqualified type. The qualifiers are assumed to be consistent | ||||||
6121 | /// with those already in the type. | ||||||
6122 | const Type *strip(QualType type) { | ||||||
6123 | addFastQualifiers(type.getLocalFastQualifiers()); | ||||||
6124 | if (!type.hasLocalNonFastQualifiers()) | ||||||
6125 | return type.getTypePtrUnsafe(); | ||||||
6126 | |||||||
6127 | const ExtQuals *extQuals = type.getExtQualsUnsafe(); | ||||||
6128 | addConsistentQualifiers(extQuals->getQualifiers()); | ||||||
6129 | return extQuals->getBaseType(); | ||||||
6130 | } | ||||||
6131 | |||||||
6132 | /// Apply the collected qualifiers to the given type. | ||||||
6133 | QualType apply(const ASTContext &Context, QualType QT) const; | ||||||
6134 | |||||||
6135 | /// Apply the collected qualifiers to the given type. | ||||||
6136 | QualType apply(const ASTContext &Context, const Type* T) const; | ||||||
6137 | }; | ||||||
6138 | |||||||
6139 | // Inline function definitions. | ||||||
6140 | |||||||
6141 | inline SplitQualType SplitQualType::getSingleStepDesugaredType() const { | ||||||
6142 | SplitQualType desugar = | ||||||
6143 | Ty->getLocallyUnqualifiedSingleStepDesugaredType().split(); | ||||||
6144 | desugar.Quals.addConsistentQualifiers(Quals); | ||||||
6145 | return desugar; | ||||||
6146 | } | ||||||
6147 | |||||||
6148 | inline const Type *QualType::getTypePtr() const { | ||||||
6149 | return getCommonPtr()->BaseType; | ||||||
6150 | } | ||||||
6151 | |||||||
6152 | inline const Type *QualType::getTypePtrOrNull() const { | ||||||
6153 | return (isNull() ? nullptr : getCommonPtr()->BaseType); | ||||||
6154 | } | ||||||
6155 | |||||||
6156 | inline SplitQualType QualType::split() const { | ||||||
6157 | if (!hasLocalNonFastQualifiers()) | ||||||
6158 | return SplitQualType(getTypePtrUnsafe(), | ||||||
6159 | Qualifiers::fromFastMask(getLocalFastQualifiers())); | ||||||
6160 | |||||||
6161 | const ExtQuals *eq = getExtQualsUnsafe(); | ||||||
6162 | Qualifiers qs = eq->getQualifiers(); | ||||||
6163 | qs.addFastQualifiers(getLocalFastQualifiers()); | ||||||
6164 | return SplitQualType(eq->getBaseType(), qs); | ||||||
6165 | } | ||||||
6166 | |||||||
6167 | inline Qualifiers QualType::getLocalQualifiers() const { | ||||||
6168 | Qualifiers Quals; | ||||||
6169 | if (hasLocalNonFastQualifiers()) | ||||||
6170 | Quals = getExtQualsUnsafe()->getQualifiers(); | ||||||
6171 | Quals.addFastQualifiers(getLocalFastQualifiers()); | ||||||
6172 | return Quals; | ||||||
6173 | } | ||||||
6174 | |||||||
6175 | inline Qualifiers QualType::getQualifiers() const { | ||||||
6176 | Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); | ||||||
6177 | quals.addFastQualifiers(getLocalFastQualifiers()); | ||||||
6178 | return quals; | ||||||
6179 | } | ||||||
6180 | |||||||
6181 | inline unsigned QualType::getCVRQualifiers() const { | ||||||
6182 | unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); | ||||||
6183 | cvr |= getLocalCVRQualifiers(); | ||||||
6184 | return cvr; | ||||||
6185 | } | ||||||
6186 | |||||||
6187 | inline QualType QualType::getCanonicalType() const { | ||||||
6188 | QualType canon = getCommonPtr()->CanonicalType; | ||||||
6189 | return canon.withFastQualifiers(getLocalFastQualifiers()); | ||||||
6190 | } | ||||||
6191 | |||||||
6192 | inline bool QualType::isCanonical() const { | ||||||
6193 | return getTypePtr()->isCanonicalUnqualified(); | ||||||
6194 | } | ||||||
6195 | |||||||
6196 | inline bool QualType::isCanonicalAsParam() const { | ||||||
6197 | if (!isCanonical()) return false; | ||||||
6198 | if (hasLocalQualifiers()) return false; | ||||||
6199 | |||||||
6200 | const Type *T = getTypePtr(); | ||||||
6201 | if (T->isVariablyModifiedType() && T->hasSizedVLAType()) | ||||||
6202 | return false; | ||||||
6203 | |||||||
6204 | return !isa<FunctionType>(T) && !isa<ArrayType>(T); | ||||||
6205 | } | ||||||
6206 | |||||||
6207 | inline bool QualType::isConstQualified() const { | ||||||
6208 | return isLocalConstQualified() || | ||||||
6209 | getCommonPtr()->CanonicalType.isLocalConstQualified(); | ||||||
6210 | } | ||||||
6211 | |||||||
6212 | inline bool QualType::isRestrictQualified() const { | ||||||
6213 | return isLocalRestrictQualified() || | ||||||
6214 | getCommonPtr()->CanonicalType.isLocalRestrictQualified(); | ||||||
6215 | } | ||||||
6216 | |||||||
6217 | |||||||
6218 | inline bool QualType::isVolatileQualified() const { | ||||||
6219 | return isLocalVolatileQualified() || | ||||||
6220 | getCommonPtr()->CanonicalType.isLocalVolatileQualified(); | ||||||
6221 | } | ||||||
6222 | |||||||
6223 | inline bool QualType::hasQualifiers() const { | ||||||
6224 | return hasLocalQualifiers() || | ||||||
6225 | getCommonPtr()->CanonicalType.hasLocalQualifiers(); | ||||||
6226 | } | ||||||
6227 | |||||||
6228 | inline QualType QualType::getUnqualifiedType() const { | ||||||
6229 | if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) | ||||||
6230 | return QualType(getTypePtr(), 0); | ||||||
6231 | |||||||
6232 | return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0); | ||||||
6233 | } | ||||||
6234 | |||||||
6235 | inline SplitQualType QualType::getSplitUnqualifiedType() const { | ||||||
6236 | if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) | ||||||
6237 | return split(); | ||||||
6238 | |||||||
6239 | return getSplitUnqualifiedTypeImpl(*this); | ||||||
6240 | } | ||||||
6241 | |||||||
6242 | inline void QualType::removeLocalConst() { | ||||||
6243 | removeLocalFastQualifiers(Qualifiers::Const); | ||||||
6244 | } | ||||||
6245 | |||||||
6246 | inline void QualType::removeLocalRestrict() { | ||||||
6247 | removeLocalFastQualifiers(Qualifiers::Restrict); | ||||||
6248 | } | ||||||
6249 | |||||||
6250 | inline void QualType::removeLocalVolatile() { | ||||||
6251 | removeLocalFastQualifiers(Qualifiers::Volatile); | ||||||
6252 | } | ||||||
6253 | |||||||
6254 | inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { | ||||||
6255 | assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits")((!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits" ) ? static_cast<void> (0) : __assert_fail ("!(Mask & ~Qualifiers::CVRMask) && \"mask has non-CVR bits\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 6255, __PRETTY_FUNCTION__)); | ||||||
6256 | static_assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask, | ||||||
6257 | "Fast bits differ from CVR bits!"); | ||||||
6258 | |||||||
6259 | // Fast path: we don't need to touch the slow qualifiers. | ||||||
6260 | removeLocalFastQualifiers(Mask); | ||||||
6261 | } | ||||||
6262 | |||||||
6263 | /// Return the address space of this type. | ||||||
6264 | inline LangAS QualType::getAddressSpace() const { | ||||||
6265 | return getQualifiers().getAddressSpace(); | ||||||
6266 | } | ||||||
6267 | |||||||
6268 | /// Return the gc attribute of this type. | ||||||
6269 | inline Qualifiers::GC QualType::getObjCGCAttr() const { | ||||||
6270 | return getQualifiers().getObjCGCAttr(); | ||||||
6271 | } | ||||||
6272 | |||||||
6273 | inline bool QualType::hasNonTrivialToPrimitiveDefaultInitializeCUnion() const { | ||||||
6274 | if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl()) | ||||||
6275 | return hasNonTrivialToPrimitiveDefaultInitializeCUnion(RD); | ||||||
6276 | return false; | ||||||
6277 | } | ||||||
6278 | |||||||
6279 | inline bool QualType::hasNonTrivialToPrimitiveDestructCUnion() const { | ||||||
6280 | if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl()) | ||||||
6281 | return hasNonTrivialToPrimitiveDestructCUnion(RD); | ||||||
6282 | return false; | ||||||
6283 | } | ||||||
6284 | |||||||
6285 | inline bool QualType::hasNonTrivialToPrimitiveCopyCUnion() const { | ||||||
6286 | if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl()) | ||||||
6287 | return hasNonTrivialToPrimitiveCopyCUnion(RD); | ||||||
6288 | return false; | ||||||
6289 | } | ||||||
6290 | |||||||
6291 | inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { | ||||||
6292 | if (const auto *PT = t.getAs<PointerType>()) { | ||||||
6293 | if (const auto *FT = PT->getPointeeType()->getAs<FunctionType>()) | ||||||
6294 | return FT->getExtInfo(); | ||||||
6295 | } else if (const auto *FT = t.getAs<FunctionType>()) | ||||||
6296 | return FT->getExtInfo(); | ||||||
6297 | |||||||
6298 | return FunctionType::ExtInfo(); | ||||||
6299 | } | ||||||
6300 | |||||||
6301 | inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { | ||||||
6302 | return getFunctionExtInfo(*t); | ||||||
6303 | } | ||||||
6304 | |||||||
6305 | /// Determine whether this type is more | ||||||
6306 | /// qualified than the Other type. For example, "const volatile int" | ||||||
6307 | /// is more qualified than "const int", "volatile int", and | ||||||
6308 | /// "int". However, it is not more qualified than "const volatile | ||||||
6309 | /// int". | ||||||
6310 | inline bool QualType::isMoreQualifiedThan(QualType other) const { | ||||||
6311 | Qualifiers MyQuals = getQualifiers(); | ||||||
6312 | Qualifiers OtherQuals = other.getQualifiers(); | ||||||
6313 | return (MyQuals != OtherQuals && MyQuals.compatiblyIncludes(OtherQuals)); | ||||||
6314 | } | ||||||
6315 | |||||||
6316 | /// Determine whether this type is at last | ||||||
6317 | /// as qualified as the Other type. For example, "const volatile | ||||||
6318 | /// int" is at least as qualified as "const int", "volatile int", | ||||||
6319 | /// "int", and "const volatile int". | ||||||
6320 | inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { | ||||||
6321 | Qualifiers OtherQuals = other.getQualifiers(); | ||||||
6322 | |||||||
6323 | // Ignore __unaligned qualifier if this type is a void. | ||||||
6324 | if (getUnqualifiedType()->isVoidType()) | ||||||
6325 | OtherQuals.removeUnaligned(); | ||||||
6326 | |||||||
6327 | return getQualifiers().compatiblyIncludes(OtherQuals); | ||||||
6328 | } | ||||||
6329 | |||||||
6330 | /// If Type is a reference type (e.g., const | ||||||
6331 | /// int&), returns the type that the reference refers to ("const | ||||||
6332 | /// int"). Otherwise, returns the type itself. This routine is used | ||||||
6333 | /// throughout Sema to implement C++ 5p6: | ||||||
6334 | /// | ||||||
6335 | /// If an expression initially has the type "reference to T" (8.3.2, | ||||||
6336 | /// 8.5.3), the type is adjusted to "T" prior to any further | ||||||
6337 | /// analysis, the expression designates the object or function | ||||||
6338 | /// denoted by the reference, and the expression is an lvalue. | ||||||
6339 | inline QualType QualType::getNonReferenceType() const { | ||||||
6340 | if (const auto *RefType = (*this)->getAs<ReferenceType>()) | ||||||
6341 | return RefType->getPointeeType(); | ||||||
6342 | else | ||||||
6343 | return *this; | ||||||
6344 | } | ||||||
6345 | |||||||
6346 | inline bool QualType::isCForbiddenLValueType() const { | ||||||
6347 | return ((getTypePtr()->isVoidType() && !hasQualifiers()) || | ||||||
6348 | getTypePtr()->isFunctionType()); | ||||||
6349 | } | ||||||
6350 | |||||||
6351 | /// Tests whether the type is categorized as a fundamental type. | ||||||
6352 | /// | ||||||
6353 | /// \returns True for types specified in C++0x [basic.fundamental]. | ||||||
6354 | inline bool Type::isFundamentalType() const { | ||||||
6355 | return isVoidType() || | ||||||
6356 | isNullPtrType() || | ||||||
6357 | // FIXME: It's really annoying that we don't have an | ||||||
6358 | // 'isArithmeticType()' which agrees with the standard definition. | ||||||
6359 | (isArithmeticType() && !isEnumeralType()); | ||||||
6360 | } | ||||||
6361 | |||||||
6362 | /// Tests whether the type is categorized as a compound type. | ||||||
6363 | /// | ||||||
6364 | /// \returns True for types specified in C++0x [basic.compound]. | ||||||
6365 | inline bool Type::isCompoundType() const { | ||||||
6366 | // C++0x [basic.compound]p1: | ||||||
6367 | // Compound types can be constructed in the following ways: | ||||||
6368 | // -- arrays of objects of a given type [...]; | ||||||
6369 | return isArrayType() || | ||||||
6370 | // -- functions, which have parameters of given types [...]; | ||||||
6371 | isFunctionType() || | ||||||
6372 | // -- pointers to void or objects or functions [...]; | ||||||
6373 | isPointerType() || | ||||||
6374 | // -- references to objects or functions of a given type. [...] | ||||||
6375 | isReferenceType() || | ||||||
6376 | // -- classes containing a sequence of objects of various types, [...]; | ||||||
6377 | isRecordType() || | ||||||
6378 | // -- unions, which are classes capable of containing objects of different | ||||||
6379 | // types at different times; | ||||||
6380 | isUnionType() || | ||||||
6381 | // -- enumerations, which comprise a set of named constant values. [...]; | ||||||
6382 | isEnumeralType() || | ||||||
6383 | // -- pointers to non-static class members, [...]. | ||||||
6384 | isMemberPointerType(); | ||||||
6385 | } | ||||||
6386 | |||||||
6387 | inline bool Type::isFunctionType() const { | ||||||
6388 | return isa<FunctionType>(CanonicalType); | ||||||
6389 | } | ||||||
6390 | |||||||
6391 | inline bool Type::isPointerType() const { | ||||||
6392 | return isa<PointerType>(CanonicalType); | ||||||
6393 | } | ||||||
6394 | |||||||
6395 | inline bool Type::isAnyPointerType() const { | ||||||
6396 | return isPointerType() || isObjCObjectPointerType(); | ||||||
6397 | } | ||||||
6398 | |||||||
6399 | inline bool Type::isBlockPointerType() const { | ||||||
6400 | return isa<BlockPointerType>(CanonicalType); | ||||||
6401 | } | ||||||
6402 | |||||||
6403 | inline bool Type::isReferenceType() const { | ||||||
6404 | return isa<ReferenceType>(CanonicalType); | ||||||
6405 | } | ||||||
6406 | |||||||
6407 | inline bool Type::isLValueReferenceType() const { | ||||||
6408 | return isa<LValueReferenceType>(CanonicalType); | ||||||
6409 | } | ||||||
6410 | |||||||
6411 | inline bool Type::isRValueReferenceType() const { | ||||||
6412 | return isa<RValueReferenceType>(CanonicalType); | ||||||
6413 | } | ||||||
6414 | |||||||
6415 | inline bool Type::isFunctionPointerType() const { | ||||||
6416 | if (const auto *T = getAs<PointerType>()) | ||||||
6417 | return T->getPointeeType()->isFunctionType(); | ||||||
6418 | else | ||||||
6419 | return false; | ||||||
6420 | } | ||||||
6421 | |||||||
6422 | inline bool Type::isFunctionReferenceType() const { | ||||||
6423 | if (const auto *T = getAs<ReferenceType>()) | ||||||
6424 | return T->getPointeeType()->isFunctionType(); | ||||||
6425 | else | ||||||
6426 | return false; | ||||||
6427 | } | ||||||
6428 | |||||||
6429 | inline bool Type::isMemberPointerType() const { | ||||||
6430 | return isa<MemberPointerType>(CanonicalType); | ||||||
6431 | } | ||||||
6432 | |||||||
6433 | inline bool Type::isMemberFunctionPointerType() const { | ||||||
6434 | if (const auto *T = getAs<MemberPointerType>()) | ||||||
6435 | return T->isMemberFunctionPointer(); | ||||||
6436 | else | ||||||
6437 | return false; | ||||||
6438 | } | ||||||
6439 | |||||||
6440 | inline bool Type::isMemberDataPointerType() const { | ||||||
6441 | if (const auto *T = getAs<MemberPointerType>()) | ||||||
6442 | return T->isMemberDataPointer(); | ||||||
6443 | else | ||||||
6444 | return false; | ||||||
6445 | } | ||||||
6446 | |||||||
6447 | inline bool Type::isArrayType() const { | ||||||
6448 | return isa<ArrayType>(CanonicalType); | ||||||
6449 | } | ||||||
6450 | |||||||
6451 | inline bool Type::isConstantArrayType() const { | ||||||
6452 | return isa<ConstantArrayType>(CanonicalType); | ||||||
6453 | } | ||||||
6454 | |||||||
6455 | inline bool Type::isIncompleteArrayType() const { | ||||||
6456 | return isa<IncompleteArrayType>(CanonicalType); | ||||||
6457 | } | ||||||
6458 | |||||||
6459 | inline bool Type::isVariableArrayType() const { | ||||||
6460 | return isa<VariableArrayType>(CanonicalType); | ||||||
6461 | } | ||||||
6462 | |||||||
6463 | inline bool Type::isDependentSizedArrayType() const { | ||||||
6464 | return isa<DependentSizedArrayType>(CanonicalType); | ||||||
6465 | } | ||||||
6466 | |||||||
6467 | inline bool Type::isBuiltinType() const { | ||||||
6468 | return isa<BuiltinType>(CanonicalType); | ||||||
6469 | } | ||||||
6470 | |||||||
6471 | inline bool Type::isRecordType() const { | ||||||
6472 | return isa<RecordType>(CanonicalType); | ||||||
6473 | } | ||||||
6474 | |||||||
6475 | inline bool Type::isEnumeralType() const { | ||||||
6476 | return isa<EnumType>(CanonicalType); | ||||||
6477 | } | ||||||
6478 | |||||||
6479 | inline bool Type::isAnyComplexType() const { | ||||||
6480 | return isa<ComplexType>(CanonicalType); | ||||||
6481 | } | ||||||
6482 | |||||||
6483 | inline bool Type::isVectorType() const { | ||||||
6484 | return isa<VectorType>(CanonicalType); | ||||||
6485 | } | ||||||
6486 | |||||||
6487 | inline bool Type::isExtVectorType() const { | ||||||
6488 | return isa<ExtVectorType>(CanonicalType); | ||||||
6489 | } | ||||||
6490 | |||||||
6491 | inline bool Type::isDependentAddressSpaceType() const { | ||||||
6492 | return isa<DependentAddressSpaceType>(CanonicalType); | ||||||
6493 | } | ||||||
6494 | |||||||
6495 | inline bool Type::isObjCObjectPointerType() const { | ||||||
6496 | return isa<ObjCObjectPointerType>(CanonicalType); | ||||||
6497 | } | ||||||
6498 | |||||||
6499 | inline bool Type::isObjCObjectType() const { | ||||||
6500 | return isa<ObjCObjectType>(CanonicalType); | ||||||
6501 | } | ||||||
6502 | |||||||
6503 | inline bool Type::isObjCObjectOrInterfaceType() const { | ||||||
6504 | return isa<ObjCInterfaceType>(CanonicalType) || | ||||||
6505 | isa<ObjCObjectType>(CanonicalType); | ||||||
6506 | } | ||||||
6507 | |||||||
6508 | inline bool Type::isAtomicType() const { | ||||||
6509 | return isa<AtomicType>(CanonicalType); | ||||||
6510 | } | ||||||
6511 | |||||||
6512 | inline bool Type::isObjCQualifiedIdType() const { | ||||||
6513 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) | ||||||
6514 | return OPT->isObjCQualifiedIdType(); | ||||||
6515 | return false; | ||||||
6516 | } | ||||||
6517 | |||||||
6518 | inline bool Type::isObjCQualifiedClassType() const { | ||||||
6519 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) | ||||||
6520 | return OPT->isObjCQualifiedClassType(); | ||||||
6521 | return false; | ||||||
6522 | } | ||||||
6523 | |||||||
6524 | inline bool Type::isObjCIdType() const { | ||||||
6525 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) | ||||||
6526 | return OPT->isObjCIdType(); | ||||||
6527 | return false; | ||||||
6528 | } | ||||||
6529 | |||||||
6530 | inline bool Type::isObjCClassType() const { | ||||||
6531 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) | ||||||
6532 | return OPT->isObjCClassType(); | ||||||
6533 | return false; | ||||||
6534 | } | ||||||
6535 | |||||||
6536 | inline bool Type::isObjCSelType() const { | ||||||
6537 | if (const auto *OPT = getAs<PointerType>()) | ||||||
6538 | return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); | ||||||
6539 | return false; | ||||||
6540 | } | ||||||
6541 | |||||||
6542 | inline bool Type::isObjCBuiltinType() const { | ||||||
6543 | return isObjCIdType() || isObjCClassType() || isObjCSelType(); | ||||||
6544 | } | ||||||
6545 | |||||||
6546 | inline bool Type::isDecltypeType() const { | ||||||
6547 | return isa<DecltypeType>(this); | ||||||
6548 | } | ||||||
6549 | |||||||
6550 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ | ||||||
6551 | inline bool Type::is##Id##Type() const { \ | ||||||
6552 | return isSpecificBuiltinType(BuiltinType::Id); \ | ||||||
6553 | } | ||||||
6554 | #include "clang/Basic/OpenCLImageTypes.def" | ||||||
6555 | |||||||
6556 | inline bool Type::isSamplerT() const { | ||||||
6557 | return isSpecificBuiltinType(BuiltinType::OCLSampler); | ||||||
6558 | } | ||||||
6559 | |||||||
6560 | inline bool Type::isEventT() const { | ||||||
6561 | return isSpecificBuiltinType(BuiltinType::OCLEvent); | ||||||
6562 | } | ||||||
6563 | |||||||
6564 | inline bool Type::isClkEventT() const { | ||||||
6565 | return isSpecificBuiltinType(BuiltinType::OCLClkEvent); | ||||||
6566 | } | ||||||
6567 | |||||||
6568 | inline bool Type::isQueueT() const { | ||||||
6569 | return isSpecificBuiltinType(BuiltinType::OCLQueue); | ||||||
6570 | } | ||||||
6571 | |||||||
6572 | inline bool Type::isReserveIDT() const { | ||||||
6573 | return isSpecificBuiltinType(BuiltinType::OCLReserveID); | ||||||
6574 | } | ||||||
6575 | |||||||
6576 | inline bool Type::isImageType() const { | ||||||
6577 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) is##Id##Type() || | ||||||
6578 | return | ||||||
6579 | #include "clang/Basic/OpenCLImageTypes.def" | ||||||
6580 | false; // end boolean or operation | ||||||
6581 | } | ||||||
6582 | |||||||
6583 | inline bool Type::isPipeType() const { | ||||||
6584 | return isa<PipeType>(CanonicalType); | ||||||
6585 | } | ||||||
6586 | |||||||
6587 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \ | ||||||
6588 | inline bool Type::is##Id##Type() const { \ | ||||||
6589 | return isSpecificBuiltinType(BuiltinType::Id); \ | ||||||
6590 | } | ||||||
6591 | #include "clang/Basic/OpenCLExtensionTypes.def" | ||||||
6592 | |||||||
6593 | inline bool Type::isOCLIntelSubgroupAVCType() const { | ||||||
6594 | #define INTEL_SUBGROUP_AVC_TYPE(ExtType, Id) \ | ||||||
6595 | isOCLIntelSubgroupAVC##Id##Type() || | ||||||
6596 | return | ||||||
6597 | #include "clang/Basic/OpenCLExtensionTypes.def" | ||||||
6598 | false; // end of boolean or operation | ||||||
6599 | } | ||||||
6600 | |||||||
6601 | inline bool Type::isOCLExtOpaqueType() const { | ||||||
6602 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) is##Id##Type() || | ||||||
6603 | return | ||||||
6604 | #include "clang/Basic/OpenCLExtensionTypes.def" | ||||||
6605 | false; // end of boolean or operation | ||||||
6606 | } | ||||||
6607 | |||||||
6608 | inline bool Type::isOpenCLSpecificType() const { | ||||||
6609 | return isSamplerT() || isEventT() || isImageType() || isClkEventT() || | ||||||
6610 | isQueueT() || isReserveIDT() || isPipeType() || isOCLExtOpaqueType(); | ||||||
6611 | } | ||||||
6612 | |||||||
6613 | inline bool Type::isTemplateTypeParmType() const { | ||||||
6614 | return isa<TemplateTypeParmType>(CanonicalType); | ||||||
6615 | } | ||||||
6616 | |||||||
6617 | inline bool Type::isSpecificBuiltinType(unsigned K) const { | ||||||
6618 | if (const BuiltinType *BT = getAs<BuiltinType>()) | ||||||
6619 | if (BT->getKind() == (BuiltinType::Kind) K) | ||||||
6620 | return true; | ||||||
6621 | return false; | ||||||
6622 | } | ||||||
6623 | |||||||
6624 | inline bool Type::isPlaceholderType() const { | ||||||
6625 | if (const auto *BT = dyn_cast<BuiltinType>(this)) | ||||||
6626 | return BT->isPlaceholderType(); | ||||||
6627 | return false; | ||||||
6628 | } | ||||||
6629 | |||||||
6630 | inline const BuiltinType *Type::getAsPlaceholderType() const { | ||||||
6631 | if (const auto *BT = dyn_cast<BuiltinType>(this)) | ||||||
6632 | if (BT->isPlaceholderType()) | ||||||
6633 | return BT; | ||||||
6634 | return nullptr; | ||||||
6635 | } | ||||||
6636 | |||||||
6637 | inline bool Type::isSpecificPlaceholderType(unsigned K) const { | ||||||
6638 | assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K))((BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)) ? static_cast<void> (0) : __assert_fail ("BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 6638, __PRETTY_FUNCTION__)); | ||||||
6639 | if (const auto *BT = dyn_cast<BuiltinType>(this)) | ||||||
6640 | return (BT->getKind() == (BuiltinType::Kind) K); | ||||||
6641 | return false; | ||||||
6642 | } | ||||||
6643 | |||||||
6644 | inline bool Type::isNonOverloadPlaceholderType() const { | ||||||
6645 | if (const auto *BT = dyn_cast<BuiltinType>(this)) | ||||||
6646 | return BT->isNonOverloadPlaceholderType(); | ||||||
6647 | return false; | ||||||
6648 | } | ||||||
6649 | |||||||
6650 | inline bool Type::isVoidType() const { | ||||||
6651 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) | ||||||
6652 | return BT->getKind() == BuiltinType::Void; | ||||||
6653 | return false; | ||||||
6654 | } | ||||||
6655 | |||||||
6656 | inline bool Type::isHalfType() const { | ||||||
6657 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) | ||||||
6658 | return BT->getKind() == BuiltinType::Half; | ||||||
6659 | // FIXME: Should we allow complex __fp16? Probably not. | ||||||
6660 | return false; | ||||||
6661 | } | ||||||
6662 | |||||||
6663 | inline bool Type::isFloat16Type() const { | ||||||
6664 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) | ||||||
6665 | return BT->getKind() == BuiltinType::Float16; | ||||||
6666 | return false; | ||||||
6667 | } | ||||||
6668 | |||||||
6669 | inline bool Type::isFloat128Type() const { | ||||||
6670 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) | ||||||
6671 | return BT->getKind() == BuiltinType::Float128; | ||||||
6672 | return false; | ||||||
6673 | } | ||||||
6674 | |||||||
6675 | inline bool Type::isNullPtrType() const { | ||||||
6676 | if (const auto *BT = getAs<BuiltinType>()) | ||||||
6677 | return BT->getKind() == BuiltinType::NullPtr; | ||||||
6678 | return false; | ||||||
6679 | } | ||||||
6680 | |||||||
6681 | bool IsEnumDeclComplete(EnumDecl *); | ||||||
6682 | bool IsEnumDeclScoped(EnumDecl *); | ||||||
6683 | |||||||
6684 | inline bool Type::isIntegerType() const { | ||||||
6685 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) | ||||||
6686 | return BT->getKind() >= BuiltinType::Bool && | ||||||
6687 | BT->getKind() <= BuiltinType::Int128; | ||||||
6688 | if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) { | ||||||
6689 | // Incomplete enum types are not treated as integer types. | ||||||
6690 | // FIXME: In C++, enum types are never integer types. | ||||||
6691 | return IsEnumDeclComplete(ET->getDecl()) && | ||||||
6692 | !IsEnumDeclScoped(ET->getDecl()); | ||||||
6693 | } | ||||||
6694 | return false; | ||||||
6695 | } | ||||||
6696 | |||||||
6697 | inline bool Type::isFixedPointType() const { | ||||||
6698 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) { | ||||||
6699 | return BT->getKind() >= BuiltinType::ShortAccum && | ||||||
6700 | BT->getKind() <= BuiltinType::SatULongFract; | ||||||
6701 | } | ||||||
6702 | return false; | ||||||
6703 | } | ||||||
6704 | |||||||
6705 | inline bool Type::isFixedPointOrIntegerType() const { | ||||||
6706 | return isFixedPointType() || isIntegerType(); | ||||||
6707 | } | ||||||
6708 | |||||||
6709 | inline bool Type::isSaturatedFixedPointType() const { | ||||||
6710 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) { | ||||||
6711 | return BT->getKind() >= BuiltinType::SatShortAccum && | ||||||
6712 | BT->getKind() <= BuiltinType::SatULongFract; | ||||||
6713 | } | ||||||
6714 | return false; | ||||||
6715 | } | ||||||
6716 | |||||||
6717 | inline bool Type::isUnsaturatedFixedPointType() const { | ||||||
6718 | return isFixedPointType() && !isSaturatedFixedPointType(); | ||||||
6719 | } | ||||||
6720 | |||||||
6721 | inline bool Type::isSignedFixedPointType() const { | ||||||
6722 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) { | ||||||
6723 | return ((BT->getKind() >= BuiltinType::ShortAccum && | ||||||
6724 | BT->getKind() <= BuiltinType::LongAccum) || | ||||||
6725 | (BT->getKind() >= BuiltinType::ShortFract && | ||||||
6726 | BT->getKind() <= BuiltinType::LongFract) || | ||||||
6727 | (BT->getKind() >= BuiltinType::SatShortAccum && | ||||||
6728 | BT->getKind() <= BuiltinType::SatLongAccum) || | ||||||
6729 | (BT->getKind() >= BuiltinType::SatShortFract && | ||||||
6730 | BT->getKind() <= BuiltinType::SatLongFract)); | ||||||
6731 | } | ||||||
6732 | return false; | ||||||
6733 | } | ||||||
6734 | |||||||
6735 | inline bool Type::isUnsignedFixedPointType() const { | ||||||
6736 | return isFixedPointType() && !isSignedFixedPointType(); | ||||||
6737 | } | ||||||
6738 | |||||||
6739 | inline bool Type::isScalarType() const { | ||||||
6740 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) | ||||||
6741 | return BT->getKind() > BuiltinType::Void && | ||||||
6742 | BT->getKind() <= BuiltinType::NullPtr; | ||||||
6743 | if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) | ||||||
6744 | // Enums are scalar types, but only if they are defined. Incomplete enums | ||||||
6745 | // are not treated as scalar types. | ||||||
6746 | return IsEnumDeclComplete(ET->getDecl()); | ||||||
6747 | return isa<PointerType>(CanonicalType) || | ||||||
6748 | isa<BlockPointerType>(CanonicalType) || | ||||||
6749 | isa<MemberPointerType>(CanonicalType) || | ||||||
6750 | isa<ComplexType>(CanonicalType) || | ||||||
6751 | isa<ObjCObjectPointerType>(CanonicalType); | ||||||
6752 | } | ||||||
6753 | |||||||
6754 | inline bool Type::isIntegralOrEnumerationType() const { | ||||||
6755 | if (const auto *BT
| ||||||
6756 | return BT->getKind() >= BuiltinType::Bool && | ||||||
6757 | BT->getKind() <= BuiltinType::Int128; | ||||||
6758 | |||||||
6759 | // Check for a complete enum type; incomplete enum types are not properly an | ||||||
6760 | // enumeration type in the sense required here. | ||||||
6761 | if (const auto *ET
| ||||||
6762 | return IsEnumDeclComplete(ET->getDecl()); | ||||||
6763 | |||||||
6764 | return false; | ||||||
6765 | } | ||||||
6766 | |||||||
6767 | inline bool Type::isBooleanType() const { | ||||||
6768 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) | ||||||
6769 | return BT->getKind() == BuiltinType::Bool; | ||||||
6770 | return false; | ||||||
6771 | } | ||||||
6772 | |||||||
6773 | inline bool Type::isUndeducedType() const { | ||||||
6774 | auto *DT = getContainedDeducedType(); | ||||||
6775 | return DT && !DT->isDeduced(); | ||||||
6776 | } | ||||||
6777 | |||||||
6778 | /// Determines whether this is a type for which one can define | ||||||
6779 | /// an overloaded operator. | ||||||
6780 | inline bool Type::isOverloadableType() const { | ||||||
6781 | return isDependentType() || isRecordType() || isEnumeralType(); | ||||||
6782 | } | ||||||
6783 | |||||||
6784 | /// Determines whether this type can decay to a pointer type. | ||||||
6785 | inline bool Type::canDecayToPointerType() const { | ||||||
6786 | return isFunctionType() || isArrayType(); | ||||||
6787 | } | ||||||
6788 | |||||||
6789 | inline bool Type::hasPointerRepresentation() const { | ||||||
6790 | return (isPointerType() || isReferenceType() || isBlockPointerType() || | ||||||
6791 | isObjCObjectPointerType() || isNullPtrType()); | ||||||
6792 | } | ||||||
6793 | |||||||
6794 | inline bool Type::hasObjCPointerRepresentation() const { | ||||||
6795 | return isObjCObjectPointerType(); | ||||||
6796 | } | ||||||
6797 | |||||||
6798 | inline const Type *Type::getBaseElementTypeUnsafe() const { | ||||||
6799 | const Type *type = this; | ||||||
6800 | while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) | ||||||
6801 | type = arrayType->getElementType().getTypePtr(); | ||||||
6802 | return type; | ||||||
6803 | } | ||||||
6804 | |||||||
6805 | inline const Type *Type::getPointeeOrArrayElementType() const { | ||||||
6806 | const Type *type = this; | ||||||
6807 | if (type->isAnyPointerType()) | ||||||
6808 | return type->getPointeeType().getTypePtr(); | ||||||
6809 | else if (type->isArrayType()) | ||||||
6810 | return type->getBaseElementTypeUnsafe(); | ||||||
6811 | return type; | ||||||
6812 | } | ||||||
6813 | |||||||
6814 | /// Insertion operator for diagnostics. This allows sending Qualifiers into a | ||||||
6815 | /// diagnostic with <<. | ||||||
6816 | inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, | ||||||
6817 | Qualifiers Q) { | ||||||
6818 | DB.AddTaggedVal(Q.getAsOpaqueValue(), | ||||||
6819 | DiagnosticsEngine::ArgumentKind::ak_qual); | ||||||
6820 | return DB; | ||||||
6821 | } | ||||||
6822 | |||||||
6823 | /// Insertion operator for partial diagnostics. This allows sending Qualifiers | ||||||
6824 | /// into a diagnostic with <<. | ||||||
6825 | inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, | ||||||
6826 | Qualifiers Q) { | ||||||
6827 | PD.AddTaggedVal(Q.getAsOpaqueValue(), | ||||||
6828 | DiagnosticsEngine::ArgumentKind::ak_qual); | ||||||
6829 | return PD; | ||||||
6830 | } | ||||||
6831 | |||||||
6832 | /// Insertion operator for diagnostics. This allows sending QualType's into a | ||||||
6833 | /// diagnostic with <<. | ||||||
6834 | inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, | ||||||
6835 | QualType T) { | ||||||
6836 | DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), | ||||||
6837 | DiagnosticsEngine::ak_qualtype); | ||||||
6838 | return DB; | ||||||
6839 | } | ||||||
6840 | |||||||
6841 | /// Insertion operator for partial diagnostics. This allows sending QualType's | ||||||
6842 | /// into a diagnostic with <<. | ||||||
6843 | inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, | ||||||
6844 | QualType T) { | ||||||
6845 | PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), | ||||||
6846 | DiagnosticsEngine::ak_qualtype); | ||||||
6847 | return PD; | ||||||
6848 | } | ||||||
6849 | |||||||
6850 | // Helper class template that is used by Type::getAs to ensure that one does | ||||||
6851 | // not try to look through a qualified type to get to an array type. | ||||||
6852 | template <typename T> | ||||||
6853 | using TypeIsArrayType = | ||||||
6854 | std::integral_constant<bool, std::is_same<T, ArrayType>::value || | ||||||
6855 | std::is_base_of<ArrayType, T>::value>; | ||||||
6856 | |||||||
6857 | // Member-template getAs<specific type>'. | ||||||
6858 | template <typename T> const T *Type::getAs() const { | ||||||
6859 | static_assert(!TypeIsArrayType<T>::value, | ||||||
6860 | "ArrayType cannot be used with getAs!"); | ||||||
6861 | |||||||
6862 | // If this is directly a T type, return it. | ||||||
6863 | if (const auto *Ty = dyn_cast<T>(this)) | ||||||
6864 | return Ty; | ||||||
6865 | |||||||
6866 | // If the canonical form of this type isn't the right kind, reject it. | ||||||
6867 | if (!isa<T>(CanonicalType)) | ||||||
6868 | return nullptr; | ||||||
6869 | |||||||
6870 | // If this is a typedef for the type, strip the typedef off without | ||||||
6871 | // losing all typedef information. | ||||||
6872 | return cast<T>(getUnqualifiedDesugaredType()); | ||||||
6873 | } | ||||||
6874 | |||||||
6875 | template <typename T> const T *Type::getAsAdjusted() const { | ||||||
6876 | static_assert(!TypeIsArrayType<T>::value, "ArrayType cannot be used with getAsAdjusted!"); | ||||||
6877 | |||||||
6878 | // If this is directly a T type, return it. | ||||||
6879 | if (const auto *Ty = dyn_cast<T>(this)) | ||||||
6880 | return Ty; | ||||||
6881 | |||||||
6882 | // If the canonical form of this type isn't the right kind, reject it. | ||||||
6883 | if (!isa<T>(CanonicalType)) | ||||||
6884 | return nullptr; | ||||||
6885 | |||||||
6886 | // Strip off type adjustments that do not modify the underlying nature of the | ||||||
6887 | // type. | ||||||
6888 | const Type *Ty = this; | ||||||
6889 | while (Ty) { | ||||||
6890 | if (const auto *A = dyn_cast<AttributedType>(Ty)) | ||||||
6891 | Ty = A->getModifiedType().getTypePtr(); | ||||||
6892 | else if (const auto *E = dyn_cast<ElaboratedType>(Ty)) | ||||||
6893 | Ty = E->desugar().getTypePtr(); | ||||||
6894 | else if (const auto *P = dyn_cast<ParenType>(Ty)) | ||||||
6895 | Ty = P->desugar().getTypePtr(); | ||||||
6896 | else if (const auto *A = dyn_cast<AdjustedType>(Ty)) | ||||||
6897 | Ty = A->desugar().getTypePtr(); | ||||||
6898 | else if (const auto *M = dyn_cast<MacroQualifiedType>(Ty)) | ||||||
6899 | Ty = M->desugar().getTypePtr(); | ||||||
6900 | else | ||||||
6901 | break; | ||||||
6902 | } | ||||||
6903 | |||||||
6904 | // Just because the canonical type is correct does not mean we can use cast<>, | ||||||
6905 | // since we may not have stripped off all the sugar down to the base type. | ||||||
6906 | return dyn_cast<T>(Ty); | ||||||
6907 | } | ||||||
6908 | |||||||
6909 | inline const ArrayType *Type::getAsArrayTypeUnsafe() const { | ||||||
6910 | // If this is directly an array type, return it. | ||||||
6911 | if (const auto *arr = dyn_cast<ArrayType>(this)) | ||||||
6912 | return arr; | ||||||
6913 | |||||||
6914 | // If the canonical form of this type isn't the right kind, reject it. | ||||||
6915 | if (!isa<ArrayType>(CanonicalType)) | ||||||
6916 | return nullptr; | ||||||
6917 | |||||||
6918 | // If this is a typedef for the type, strip the typedef off without | ||||||
6919 | // losing all typedef information. | ||||||
6920 | return cast<ArrayType>(getUnqualifiedDesugaredType()); | ||||||
6921 | } | ||||||
6922 | |||||||
6923 | template <typename T> const T *Type::castAs() const { | ||||||
6924 | static_assert(!TypeIsArrayType<T>::value, | ||||||
6925 | "ArrayType cannot be used with castAs!"); | ||||||
6926 | |||||||
6927 | if (const auto *ty = dyn_cast<T>(this)) return ty; | ||||||
6928 | assert(isa<T>(CanonicalType))((isa<T>(CanonicalType)) ? static_cast<void> (0) : __assert_fail ("isa<T>(CanonicalType)", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 6928, __PRETTY_FUNCTION__)); | ||||||
6929 | return cast<T>(getUnqualifiedDesugaredType()); | ||||||
6930 | } | ||||||
6931 | |||||||
6932 | inline const ArrayType *Type::castAsArrayTypeUnsafe() const { | ||||||
6933 | assert(isa<ArrayType>(CanonicalType))((isa<ArrayType>(CanonicalType)) ? static_cast<void> (0) : __assert_fail ("isa<ArrayType>(CanonicalType)", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 6933, __PRETTY_FUNCTION__)); | ||||||
6934 | if (const auto *arr = dyn_cast<ArrayType>(this)) return arr; | ||||||
6935 | return cast<ArrayType>(getUnqualifiedDesugaredType()); | ||||||
6936 | } | ||||||
6937 | |||||||
6938 | DecayedType::DecayedType(QualType OriginalType, QualType DecayedPtr, | ||||||
6939 | QualType CanonicalPtr) | ||||||
6940 | : AdjustedType(Decayed, OriginalType, DecayedPtr, CanonicalPtr) { | ||||||
6941 | #ifndef NDEBUG | ||||||
6942 | QualType Adjusted = getAdjustedType(); | ||||||
6943 | (void)AttributedType::stripOuterNullability(Adjusted); | ||||||
6944 | assert(isa<PointerType>(Adjusted))((isa<PointerType>(Adjusted)) ? static_cast<void> (0) : __assert_fail ("isa<PointerType>(Adjusted)", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 6944, __PRETTY_FUNCTION__)); | ||||||
6945 | #endif | ||||||
6946 | } | ||||||
6947 | |||||||
6948 | QualType DecayedType::getPointeeType() const { | ||||||
6949 | QualType Decayed = getDecayedType(); | ||||||
6950 | (void)AttributedType::stripOuterNullability(Decayed); | ||||||
6951 | return cast<PointerType>(Decayed)->getPointeeType(); | ||||||
6952 | } | ||||||
6953 | |||||||
6954 | // Get the decimal string representation of a fixed point type, represented | ||||||
6955 | // as a scaled integer. | ||||||
6956 | // TODO: At some point, we should change the arguments to instead just accept an | ||||||
6957 | // APFixedPoint instead of APSInt and scale. | ||||||
6958 | void FixedPointValueToString(SmallVectorImpl<char> &Str, llvm::APSInt Val, | ||||||
6959 | unsigned Scale); | ||||||
6960 | |||||||
6961 | } // namespace clang | ||||||
6962 | |||||||
6963 | #endif // LLVM_CLANG_AST_TYPE_H |
1 | //===- llvm/Support/Casting.h - Allow flexible, checked, casts --*- C++ -*-===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | // |
9 | // This file defines the isa<X>(), cast<X>(), dyn_cast<X>(), cast_or_null<X>(), |
10 | // and dyn_cast_or_null<X>() templates. |
11 | // |
12 | //===----------------------------------------------------------------------===// |
13 | |
14 | #ifndef LLVM_SUPPORT_CASTING_H |
15 | #define LLVM_SUPPORT_CASTING_H |
16 | |
17 | #include "llvm/Support/Compiler.h" |
18 | #include "llvm/Support/type_traits.h" |
19 | #include <cassert> |
20 | #include <memory> |
21 | #include <type_traits> |
22 | |
23 | namespace llvm { |
24 | |
25 | //===----------------------------------------------------------------------===// |
26 | // isa<x> Support Templates |
27 | //===----------------------------------------------------------------------===// |
28 | |
29 | // Define a template that can be specialized by smart pointers to reflect the |
30 | // fact that they are automatically dereferenced, and are not involved with the |
31 | // template selection process... the default implementation is a noop. |
32 | // |
33 | template<typename From> struct simplify_type { |
34 | using SimpleType = From; // The real type this represents... |
35 | |
36 | // An accessor to get the real value... |
37 | static SimpleType &getSimplifiedValue(From &Val) { return Val; } |
38 | }; |
39 | |
40 | template<typename From> struct simplify_type<const From> { |
41 | using NonConstSimpleType = typename simplify_type<From>::SimpleType; |
42 | using SimpleType = |
43 | typename add_const_past_pointer<NonConstSimpleType>::type; |
44 | using RetType = |
45 | typename add_lvalue_reference_if_not_pointer<SimpleType>::type; |
46 | |
47 | static RetType getSimplifiedValue(const From& Val) { |
48 | return simplify_type<From>::getSimplifiedValue(const_cast<From&>(Val)); |
49 | } |
50 | }; |
51 | |
52 | // The core of the implementation of isa<X> is here; To and From should be |
53 | // the names of classes. This template can be specialized to customize the |
54 | // implementation of isa<> without rewriting it from scratch. |
55 | template <typename To, typename From, typename Enabler = void> |
56 | struct isa_impl { |
57 | static inline bool doit(const From &Val) { |
58 | return To::classof(&Val); |
59 | } |
60 | }; |
61 | |
62 | /// Always allow upcasts, and perform no dynamic check for them. |
63 | template <typename To, typename From> |
64 | struct isa_impl< |
65 | To, From, typename std::enable_if<std::is_base_of<To, From>::value>::type> { |
66 | static inline bool doit(const From &) { return true; } |
67 | }; |
68 | |
69 | template <typename To, typename From> struct isa_impl_cl { |
70 | static inline bool doit(const From &Val) { |
71 | return isa_impl<To, From>::doit(Val); |
72 | } |
73 | }; |
74 | |
75 | template <typename To, typename From> struct isa_impl_cl<To, const From> { |
76 | static inline bool doit(const From &Val) { |
77 | return isa_impl<To, From>::doit(Val); |
78 | } |
79 | }; |
80 | |
81 | template <typename To, typename From> |
82 | struct isa_impl_cl<To, const std::unique_ptr<From>> { |
83 | static inline bool doit(const std::unique_ptr<From> &Val) { |
84 | assert(Val && "isa<> used on a null pointer")((Val && "isa<> used on a null pointer") ? static_cast <void> (0) : __assert_fail ("Val && \"isa<> used on a null pointer\"" , "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/Support/Casting.h" , 84, __PRETTY_FUNCTION__)); |
85 | return isa_impl_cl<To, From>::doit(*Val); |
86 | } |
87 | }; |
88 | |
89 | template <typename To, typename From> struct isa_impl_cl<To, From*> { |
90 | static inline bool doit(const From *Val) { |
91 | assert(Val && "isa<> used on a null pointer")((Val && "isa<> used on a null pointer") ? static_cast <void> (0) : __assert_fail ("Val && \"isa<> used on a null pointer\"" , "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/Support/Casting.h" , 91, __PRETTY_FUNCTION__)); |
92 | return isa_impl<To, From>::doit(*Val); |
93 | } |
94 | }; |
95 | |
96 | template <typename To, typename From> struct isa_impl_cl<To, From*const> { |
97 | static inline bool doit(const From *Val) { |
98 | assert(Val && "isa<> used on a null pointer")((Val && "isa<> used on a null pointer") ? static_cast <void> (0) : __assert_fail ("Val && \"isa<> used on a null pointer\"" , "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/Support/Casting.h" , 98, __PRETTY_FUNCTION__)); |
99 | return isa_impl<To, From>::doit(*Val); |
100 | } |
101 | }; |
102 | |
103 | template <typename To, typename From> struct isa_impl_cl<To, const From*> { |
104 | static inline bool doit(const From *Val) { |
105 | assert(Val && "isa<> used on a null pointer")((Val && "isa<> used on a null pointer") ? static_cast <void> (0) : __assert_fail ("Val && \"isa<> used on a null pointer\"" , "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/Support/Casting.h" , 105, __PRETTY_FUNCTION__)); |
106 | return isa_impl<To, From>::doit(*Val); |
107 | } |
108 | }; |
109 | |
110 | template <typename To, typename From> struct isa_impl_cl<To, const From*const> { |
111 | static inline bool doit(const From *Val) { |
112 | assert(Val && "isa<> used on a null pointer")((Val && "isa<> used on a null pointer") ? static_cast <void> (0) : __assert_fail ("Val && \"isa<> used on a null pointer\"" , "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/Support/Casting.h" , 112, __PRETTY_FUNCTION__)); |
113 | return isa_impl<To, From>::doit(*Val); |
114 | } |
115 | }; |
116 | |
117 | template<typename To, typename From, typename SimpleFrom> |
118 | struct isa_impl_wrap { |
119 | // When From != SimplifiedType, we can simplify the type some more by using |
120 | // the simplify_type template. |
121 | static bool doit(const From &Val) { |
122 | return isa_impl_wrap<To, SimpleFrom, |
123 | typename simplify_type<SimpleFrom>::SimpleType>::doit( |
124 | simplify_type<const From>::getSimplifiedValue(Val)); |
125 | } |
126 | }; |
127 | |
128 | template<typename To, typename FromTy> |
129 | struct isa_impl_wrap<To, FromTy, FromTy> { |
130 | // When From == SimpleType, we are as simple as we are going to get. |
131 | static bool doit(const FromTy &Val) { |
132 | return isa_impl_cl<To,FromTy>::doit(Val); |
133 | } |
134 | }; |
135 | |
136 | // isa<X> - Return true if the parameter to the template is an instance of the |
137 | // template type argument. Used like this: |
138 | // |
139 | // if (isa<Type>(myVal)) { ... } |
140 | // |
141 | template <class X, class Y> LLVM_NODISCARD[[clang::warn_unused_result]] inline bool isa(const Y &Val) { |
142 | return isa_impl_wrap<X, const Y, |
143 | typename simplify_type<const Y>::SimpleType>::doit(Val); |
144 | } |
145 | |
146 | // isa_and_nonnull<X> - Functionally identical to isa, except that a null value |
147 | // is accepted. |
148 | // |
149 | template <class X, class Y> |
150 | LLVM_NODISCARD[[clang::warn_unused_result]] inline bool isa_and_nonnull(const Y &Val) { |
151 | if (!Val) |
152 | return false; |
153 | return isa<X>(Val); |
154 | } |
155 | |
156 | //===----------------------------------------------------------------------===// |
157 | // cast<x> Support Templates |
158 | //===----------------------------------------------------------------------===// |
159 | |
160 | template<class To, class From> struct cast_retty; |
161 | |
162 | // Calculate what type the 'cast' function should return, based on a requested |
163 | // type of To and a source type of From. |
164 | template<class To, class From> struct cast_retty_impl { |
165 | using ret_type = To &; // Normal case, return Ty& |
166 | }; |
167 | template<class To, class From> struct cast_retty_impl<To, const From> { |
168 | using ret_type = const To &; // Normal case, return Ty& |
169 | }; |
170 | |
171 | template<class To, class From> struct cast_retty_impl<To, From*> { |
172 | using ret_type = To *; // Pointer arg case, return Ty* |
173 | }; |
174 | |
175 | template<class To, class From> struct cast_retty_impl<To, const From*> { |
176 | using ret_type = const To *; // Constant pointer arg case, return const Ty* |
177 | }; |
178 | |
179 | template<class To, class From> struct cast_retty_impl<To, const From*const> { |
180 | using ret_type = const To *; // Constant pointer arg case, return const Ty* |
181 | }; |
182 | |
183 | template <class To, class From> |
184 | struct cast_retty_impl<To, std::unique_ptr<From>> { |
185 | private: |
186 | using PointerType = typename cast_retty_impl<To, From *>::ret_type; |
187 | using ResultType = typename std::remove_pointer<PointerType>::type; |
188 | |
189 | public: |
190 | using ret_type = std::unique_ptr<ResultType>; |
191 | }; |
192 | |
193 | template<class To, class From, class SimpleFrom> |
194 | struct cast_retty_wrap { |
195 | // When the simplified type and the from type are not the same, use the type |
196 | // simplifier to reduce the type, then reuse cast_retty_impl to get the |
197 | // resultant type. |
198 | using ret_type = typename cast_retty<To, SimpleFrom>::ret_type; |
199 | }; |
200 | |
201 | template<class To, class FromTy> |
202 | struct cast_retty_wrap<To, FromTy, FromTy> { |
203 | // When the simplified type is equal to the from type, use it directly. |
204 | using ret_type = typename cast_retty_impl<To,FromTy>::ret_type; |
205 | }; |
206 | |
207 | template<class To, class From> |
208 | struct cast_retty { |
209 | using ret_type = typename cast_retty_wrap< |
210 | To, From, typename simplify_type<From>::SimpleType>::ret_type; |
211 | }; |
212 | |
213 | // Ensure the non-simple values are converted using the simplify_type template |
214 | // that may be specialized by smart pointers... |
215 | // |
216 | template<class To, class From, class SimpleFrom> struct cast_convert_val { |
217 | // This is not a simple type, use the template to simplify it... |
218 | static typename cast_retty<To, From>::ret_type doit(From &Val) { |
219 | return cast_convert_val<To, SimpleFrom, |
220 | typename simplify_type<SimpleFrom>::SimpleType>::doit( |
221 | simplify_type<From>::getSimplifiedValue(Val)); |
222 | } |
223 | }; |
224 | |
225 | template<class To, class FromTy> struct cast_convert_val<To,FromTy,FromTy> { |
226 | // This _is_ a simple type, just cast it. |
227 | static typename cast_retty<To, FromTy>::ret_type doit(const FromTy &Val) { |
228 | typename cast_retty<To, FromTy>::ret_type Res2 |
229 | = (typename cast_retty<To, FromTy>::ret_type)const_cast<FromTy&>(Val); |
230 | return Res2; |
231 | } |
232 | }; |
233 | |
234 | template <class X> struct is_simple_type { |
235 | static const bool value = |
236 | std::is_same<X, typename simplify_type<X>::SimpleType>::value; |
237 | }; |
238 | |
239 | // cast<X> - Return the argument parameter cast to the specified type. This |
240 | // casting operator asserts that the type is correct, so it does not return null |
241 | // on failure. It does not allow a null argument (use cast_or_null for that). |
242 | // It is typically used like this: |
243 | // |
244 | // cast<Instruction>(myVal)->getParent() |
245 | // |
246 | template <class X, class Y> |
247 | inline typename std::enable_if<!is_simple_type<Y>::value, |
248 | typename cast_retty<X, const Y>::ret_type>::type |
249 | cast(const Y &Val) { |
250 | assert(isa<X>(Val) && "cast<Ty>() argument of incompatible type!")((isa<X>(Val) && "cast<Ty>() argument of incompatible type!" ) ? static_cast<void> (0) : __assert_fail ("isa<X>(Val) && \"cast<Ty>() argument of incompatible type!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/Support/Casting.h" , 250, __PRETTY_FUNCTION__)); |
251 | return cast_convert_val< |
252 | X, const Y, typename simplify_type<const Y>::SimpleType>::doit(Val); |
253 | } |
254 | |
255 | template <class X, class Y> |
256 | inline typename cast_retty<X, Y>::ret_type cast(Y &Val) { |
257 | assert(isa<X>(Val) && "cast<Ty>() argument of incompatible type!")((isa<X>(Val) && "cast<Ty>() argument of incompatible type!" ) ? static_cast<void> (0) : __assert_fail ("isa<X>(Val) && \"cast<Ty>() argument of incompatible type!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/Support/Casting.h" , 257, __PRETTY_FUNCTION__)); |
258 | return cast_convert_val<X, Y, |
259 | typename simplify_type<Y>::SimpleType>::doit(Val); |
260 | } |
261 | |
262 | template <class X, class Y> |
263 | inline typename cast_retty<X, Y *>::ret_type cast(Y *Val) { |
264 | assert(isa<X>(Val) && "cast<Ty>() argument of incompatible type!")((isa<X>(Val) && "cast<Ty>() argument of incompatible type!" ) ? static_cast<void> (0) : __assert_fail ("isa<X>(Val) && \"cast<Ty>() argument of incompatible type!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/Support/Casting.h" , 264, __PRETTY_FUNCTION__)); |
265 | return cast_convert_val<X, Y*, |
266 | typename simplify_type<Y*>::SimpleType>::doit(Val); |
267 | } |
268 | |
269 | template <class X, class Y> |
270 | inline typename cast_retty<X, std::unique_ptr<Y>>::ret_type |
271 | cast(std::unique_ptr<Y> &&Val) { |
272 | assert(isa<X>(Val.get()) && "cast<Ty>() argument of incompatible type!")((isa<X>(Val.get()) && "cast<Ty>() argument of incompatible type!" ) ? static_cast<void> (0) : __assert_fail ("isa<X>(Val.get()) && \"cast<Ty>() argument of incompatible type!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/Support/Casting.h" , 272, __PRETTY_FUNCTION__)); |
273 | using ret_type = typename cast_retty<X, std::unique_ptr<Y>>::ret_type; |
274 | return ret_type( |
275 | cast_convert_val<X, Y *, typename simplify_type<Y *>::SimpleType>::doit( |
276 | Val.release())); |
277 | } |
278 | |
279 | // cast_or_null<X> - Functionally identical to cast, except that a null value is |
280 | // accepted. |
281 | // |
282 | template <class X, class Y> |
283 | LLVM_NODISCARD[[clang::warn_unused_result]] inline |
284 | typename std::enable_if<!is_simple_type<Y>::value, |
285 | typename cast_retty<X, const Y>::ret_type>::type |
286 | cast_or_null(const Y &Val) { |
287 | if (!Val) |
288 | return nullptr; |
289 | assert(isa<X>(Val) && "cast_or_null<Ty>() argument of incompatible type!")((isa<X>(Val) && "cast_or_null<Ty>() argument of incompatible type!" ) ? static_cast<void> (0) : __assert_fail ("isa<X>(Val) && \"cast_or_null<Ty>() argument of incompatible type!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/Support/Casting.h" , 289, __PRETTY_FUNCTION__)); |
290 | return cast<X>(Val); |
291 | } |
292 | |
293 | template <class X, class Y> |
294 | LLVM_NODISCARD[[clang::warn_unused_result]] inline |
295 | typename std::enable_if<!is_simple_type<Y>::value, |
296 | typename cast_retty<X, Y>::ret_type>::type |
297 | cast_or_null(Y &Val) { |
298 | if (!Val) |
299 | return nullptr; |
300 | assert(isa<X>(Val) && "cast_or_null<Ty>() argument of incompatible type!")((isa<X>(Val) && "cast_or_null<Ty>() argument of incompatible type!" ) ? static_cast<void> (0) : __assert_fail ("isa<X>(Val) && \"cast_or_null<Ty>() argument of incompatible type!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/Support/Casting.h" , 300, __PRETTY_FUNCTION__)); |
301 | return cast<X>(Val); |
302 | } |
303 | |
304 | template <class X, class Y> |
305 | LLVM_NODISCARD[[clang::warn_unused_result]] inline typename cast_retty<X, Y *>::ret_type |
306 | cast_or_null(Y *Val) { |
307 | if (!Val) return nullptr; |
308 | assert(isa<X>(Val) && "cast_or_null<Ty>() argument of incompatible type!")((isa<X>(Val) && "cast_or_null<Ty>() argument of incompatible type!" ) ? static_cast<void> (0) : __assert_fail ("isa<X>(Val) && \"cast_or_null<Ty>() argument of incompatible type!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/include/llvm/Support/Casting.h" , 308, __PRETTY_FUNCTION__)); |
309 | return cast<X>(Val); |
310 | } |
311 | |
312 | template <class X, class Y> |
313 | inline typename cast_retty<X, std::unique_ptr<Y>>::ret_type |
314 | cast_or_null(std::unique_ptr<Y> &&Val) { |
315 | if (!Val) |
316 | return nullptr; |
317 | return cast<X>(std::move(Val)); |
318 | } |
319 | |
320 | // dyn_cast<X> - Return the argument parameter cast to the specified type. This |
321 | // casting operator returns null if the argument is of the wrong type, so it can |
322 | // be used to test for a type as well as cast if successful. This should be |
323 | // used in the context of an if statement like this: |
324 | // |
325 | // if (const Instruction *I = dyn_cast<Instruction>(myVal)) { ... } |
326 | // |
327 | |
328 | template <class X, class Y> |
329 | LLVM_NODISCARD[[clang::warn_unused_result]] inline |
330 | typename std::enable_if<!is_simple_type<Y>::value, |
331 | typename cast_retty<X, const Y>::ret_type>::type |
332 | dyn_cast(const Y &Val) { |
333 | return isa<X>(Val) ? cast<X>(Val) : nullptr; |
334 | } |
335 | |
336 | template <class X, class Y> |
337 | LLVM_NODISCARD[[clang::warn_unused_result]] inline typename cast_retty<X, Y>::ret_type dyn_cast(Y &Val) { |
338 | return isa<X>(Val) ? cast<X>(Val) : nullptr; |
339 | } |
340 | |
341 | template <class X, class Y> |
342 | LLVM_NODISCARD[[clang::warn_unused_result]] inline typename cast_retty<X, Y *>::ret_type dyn_cast(Y *Val) { |
343 | return isa<X>(Val) ? cast<X>(Val) : nullptr; |
344 | } |
345 | |
346 | // dyn_cast_or_null<X> - Functionally identical to dyn_cast, except that a null |
347 | // value is accepted. |
348 | // |
349 | template <class X, class Y> |
350 | LLVM_NODISCARD[[clang::warn_unused_result]] inline |
351 | typename std::enable_if<!is_simple_type<Y>::value, |
352 | typename cast_retty<X, const Y>::ret_type>::type |
353 | dyn_cast_or_null(const Y &Val) { |
354 | return (Val && isa<X>(Val)) ? cast<X>(Val) : nullptr; |
355 | } |
356 | |
357 | template <class X, class Y> |
358 | LLVM_NODISCARD[[clang::warn_unused_result]] inline |
359 | typename std::enable_if<!is_simple_type<Y>::value, |
360 | typename cast_retty<X, Y>::ret_type>::type |
361 | dyn_cast_or_null(Y &Val) { |
362 | return (Val && isa<X>(Val)) ? cast<X>(Val) : nullptr; |
363 | } |
364 | |
365 | template <class X, class Y> |
366 | LLVM_NODISCARD[[clang::warn_unused_result]] inline typename cast_retty<X, Y *>::ret_type |
367 | dyn_cast_or_null(Y *Val) { |
368 | return (Val && isa<X>(Val)) ? cast<X>(Val) : nullptr; |
369 | } |
370 | |
371 | // unique_dyn_cast<X> - Given a unique_ptr<Y>, try to return a unique_ptr<X>, |
372 | // taking ownership of the input pointer iff isa<X>(Val) is true. If the |
373 | // cast is successful, From refers to nullptr on exit and the casted value |
374 | // is returned. If the cast is unsuccessful, the function returns nullptr |
375 | // and From is unchanged. |
376 | template <class X, class Y> |
377 | LLVM_NODISCARD[[clang::warn_unused_result]] inline auto unique_dyn_cast(std::unique_ptr<Y> &Val) |
378 | -> decltype(cast<X>(Val)) { |
379 | if (!isa<X>(Val)) |
380 | return nullptr; |
381 | return cast<X>(std::move(Val)); |
382 | } |
383 | |
384 | template <class X, class Y> |
385 | LLVM_NODISCARD[[clang::warn_unused_result]] inline auto unique_dyn_cast(std::unique_ptr<Y> &&Val) |
386 | -> decltype(cast<X>(Val)) { |
387 | return unique_dyn_cast<X, Y>(Val); |
388 | } |
389 | |
390 | // dyn_cast_or_null<X> - Functionally identical to unique_dyn_cast, except that |
391 | // a null value is accepted. |
392 | template <class X, class Y> |
393 | LLVM_NODISCARD[[clang::warn_unused_result]] inline auto unique_dyn_cast_or_null(std::unique_ptr<Y> &Val) |
394 | -> decltype(cast<X>(Val)) { |
395 | if (!Val) |
396 | return nullptr; |
397 | return unique_dyn_cast<X, Y>(Val); |
398 | } |
399 | |
400 | template <class X, class Y> |
401 | LLVM_NODISCARD[[clang::warn_unused_result]] inline auto unique_dyn_cast_or_null(std::unique_ptr<Y> &&Val) |
402 | -> decltype(cast<X>(Val)) { |
403 | return unique_dyn_cast_or_null<X, Y>(Val); |
404 | } |
405 | |
406 | } // end namespace llvm |
407 | |
408 | #endif // LLVM_SUPPORT_CASTING_H |