File: | tools/clang/lib/Sema/SemaTemplate.cpp |
Warning: | line 204, column 25 Potential leak of memory pointed to by field 'DiagStorage' |
Press '?' to see keyboard shortcuts
Keyboard shortcuts:
1 | //===------- SemaTemplate.cpp - Semantic Analysis for C++ Templates -------===// | |||
2 | // | |||
3 | // The LLVM Compiler Infrastructure | |||
4 | // | |||
5 | // This file is distributed under the University of Illinois Open Source | |||
6 | // License. See LICENSE.TXT for details. | |||
7 | //===----------------------------------------------------------------------===// | |||
8 | // | |||
9 | // This file implements semantic analysis for C++ templates. | |||
10 | //===----------------------------------------------------------------------===// | |||
11 | ||||
12 | #include "TreeTransform.h" | |||
13 | #include "clang/AST/ASTConsumer.h" | |||
14 | #include "clang/AST/ASTContext.h" | |||
15 | #include "clang/AST/DeclFriend.h" | |||
16 | #include "clang/AST/DeclTemplate.h" | |||
17 | #include "clang/AST/Expr.h" | |||
18 | #include "clang/AST/ExprCXX.h" | |||
19 | #include "clang/AST/RecursiveASTVisitor.h" | |||
20 | #include "clang/AST/TypeVisitor.h" | |||
21 | #include "clang/Basic/Builtins.h" | |||
22 | #include "clang/Basic/LangOptions.h" | |||
23 | #include "clang/Basic/PartialDiagnostic.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 | /// \brief [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.")(static_cast <bool> (!FD && "Cannot collect constraints from function declaration yet." ) ? void (0) : __assert_fail ("!FD && \"Cannot collect constraints from function declaration yet.\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 64, __extension__ __PRETTY_FUNCTION__)); | |||
65 | return Params->getRequiresClause(); | |||
66 | } | |||
67 | ||||
68 | /// \brief 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 | static NamedDecl *isAcceptableTemplateName(ASTContext &Context, | |||
72 | NamedDecl *Orig, | |||
73 | bool AllowFunctionTemplates) { | |||
74 | NamedDecl *D = Orig->getUnderlyingDecl(); | |||
75 | ||||
76 | if (isa<TemplateDecl>(D)) { | |||
77 | if (!AllowFunctionTemplates && isa<FunctionTemplateDecl>(D)) | |||
78 | return nullptr; | |||
79 | ||||
80 | return Orig; | |||
81 | } | |||
82 | ||||
83 | if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(D)) { | |||
84 | // C++ [temp.local]p1: | |||
85 | // Like normal (non-template) classes, class templates have an | |||
86 | // injected-class-name (Clause 9). The injected-class-name | |||
87 | // can be used with or without a template-argument-list. When | |||
88 | // it is used without a template-argument-list, it is | |||
89 | // equivalent to the injected-class-name followed by the | |||
90 | // template-parameters of the class template enclosed in | |||
91 | // <>. When it is used with a template-argument-list, it | |||
92 | // refers to the specified class template specialization, | |||
93 | // which could be the current specialization or another | |||
94 | // specialization. | |||
95 | if (Record->isInjectedClassName()) { | |||
96 | Record = cast<CXXRecordDecl>(Record->getDeclContext()); | |||
97 | if (Record->getDescribedClassTemplate()) | |||
98 | return Record->getDescribedClassTemplate(); | |||
99 | ||||
100 | if (ClassTemplateSpecializationDecl *Spec | |||
101 | = dyn_cast<ClassTemplateSpecializationDecl>(Record)) | |||
102 | return Spec->getSpecializedTemplate(); | |||
103 | } | |||
104 | ||||
105 | return nullptr; | |||
106 | } | |||
107 | ||||
108 | return nullptr; | |||
109 | } | |||
110 | ||||
111 | void Sema::FilterAcceptableTemplateNames(LookupResult &R, | |||
112 | bool AllowFunctionTemplates) { | |||
113 | // The set of class templates we've already seen. | |||
114 | llvm::SmallPtrSet<ClassTemplateDecl *, 8> ClassTemplates; | |||
115 | LookupResult::Filter filter = R.makeFilter(); | |||
116 | while (filter.hasNext()) { | |||
117 | NamedDecl *Orig = filter.next(); | |||
118 | NamedDecl *Repl = isAcceptableTemplateName(Context, Orig, | |||
119 | AllowFunctionTemplates); | |||
120 | if (!Repl) | |||
121 | filter.erase(); | |||
122 | else if (Repl != Orig) { | |||
123 | ||||
124 | // C++ [temp.local]p3: | |||
125 | // A lookup that finds an injected-class-name (10.2) can result in an | |||
126 | // ambiguity in certain cases (for example, if it is found in more than | |||
127 | // one base class). If all of the injected-class-names that are found | |||
128 | // refer to specializations of the same class template, and if the name | |||
129 | // is used as a template-name, the reference refers to the class | |||
130 | // template itself and not a specialization thereof, and is not | |||
131 | // ambiguous. | |||
132 | if (ClassTemplateDecl *ClassTmpl = dyn_cast<ClassTemplateDecl>(Repl)) | |||
133 | if (!ClassTemplates.insert(ClassTmpl).second) { | |||
134 | filter.erase(); | |||
135 | continue; | |||
136 | } | |||
137 | ||||
138 | // FIXME: we promote access to public here as a workaround to | |||
139 | // the fact that LookupResult doesn't let us remember that we | |||
140 | // found this template through a particular injected class name, | |||
141 | // which means we end up doing nasty things to the invariants. | |||
142 | // Pretending that access is public is *much* safer. | |||
143 | filter.replace(Repl, AS_public); | |||
144 | } | |||
145 | } | |||
146 | filter.done(); | |||
147 | } | |||
148 | ||||
149 | bool Sema::hasAnyAcceptableTemplateNames(LookupResult &R, | |||
150 | bool AllowFunctionTemplates) { | |||
151 | for (LookupResult::iterator I = R.begin(), IEnd = R.end(); I != IEnd; ++I) | |||
152 | if (isAcceptableTemplateName(Context, *I, AllowFunctionTemplates)) | |||
153 | return true; | |||
154 | ||||
155 | return false; | |||
156 | } | |||
157 | ||||
158 | TemplateNameKind Sema::isTemplateName(Scope *S, | |||
159 | CXXScopeSpec &SS, | |||
160 | bool hasTemplateKeyword, | |||
161 | UnqualifiedId &Name, | |||
162 | ParsedType ObjectTypePtr, | |||
163 | bool EnteringContext, | |||
164 | TemplateTy &TemplateResult, | |||
165 | bool &MemberOfUnknownSpecialization) { | |||
166 | assert(getLangOpts().CPlusPlus && "No template names in C!")(static_cast <bool> (getLangOpts().CPlusPlus && "No template names in C!") ? void (0) : __assert_fail ("getLangOpts().CPlusPlus && \"No template names in C!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 166, __extension__ __PRETTY_FUNCTION__)); | |||
167 | ||||
168 | DeclarationName TName; | |||
169 | MemberOfUnknownSpecialization = false; | |||
170 | ||||
171 | switch (Name.getKind()) { | |||
172 | case UnqualifiedIdKind::IK_Identifier: | |||
173 | TName = DeclarationName(Name.Identifier); | |||
174 | break; | |||
175 | ||||
176 | case UnqualifiedIdKind::IK_OperatorFunctionId: | |||
177 | TName = Context.DeclarationNames.getCXXOperatorName( | |||
178 | Name.OperatorFunctionId.Operator); | |||
179 | break; | |||
180 | ||||
181 | case UnqualifiedIdKind::IK_LiteralOperatorId: | |||
182 | TName = Context.DeclarationNames.getCXXLiteralOperatorName(Name.Identifier); | |||
183 | break; | |||
184 | ||||
185 | default: | |||
186 | return TNK_Non_template; | |||
187 | } | |||
188 | ||||
189 | QualType ObjectType = ObjectTypePtr.get(); | |||
190 | ||||
191 | LookupResult R(*this, TName, Name.getLocStart(), LookupOrdinaryName); | |||
192 | LookupTemplateName(R, S, SS, ObjectType, EnteringContext, | |||
193 | MemberOfUnknownSpecialization); | |||
194 | if (R.empty()) return TNK_Non_template; | |||
195 | if (R.isAmbiguous()) { | |||
196 | // Suppress diagnostics; we'll redo this lookup later. | |||
197 | R.suppressDiagnostics(); | |||
198 | ||||
199 | // FIXME: we might have ambiguous templates, in which case we | |||
200 | // should at least parse them properly! | |||
201 | return TNK_Non_template; | |||
202 | } | |||
203 | ||||
204 | TemplateName Template; | |||
205 | TemplateNameKind TemplateKind; | |||
206 | ||||
207 | unsigned ResultCount = R.end() - R.begin(); | |||
208 | if (ResultCount > 1) { | |||
209 | // We assume that we'll preserve the qualifier from a function | |||
210 | // template name in other ways. | |||
211 | Template = Context.getOverloadedTemplateName(R.begin(), R.end()); | |||
212 | TemplateKind = TNK_Function_template; | |||
213 | ||||
214 | // We'll do this lookup again later. | |||
215 | R.suppressDiagnostics(); | |||
216 | } else { | |||
217 | TemplateDecl *TD = cast<TemplateDecl>((*R.begin())->getUnderlyingDecl()); | |||
218 | ||||
219 | if (SS.isSet() && !SS.isInvalid()) { | |||
220 | NestedNameSpecifier *Qualifier = SS.getScopeRep(); | |||
221 | Template = Context.getQualifiedTemplateName(Qualifier, | |||
222 | hasTemplateKeyword, TD); | |||
223 | } else { | |||
224 | Template = TemplateName(TD); | |||
225 | } | |||
226 | ||||
227 | if (isa<FunctionTemplateDecl>(TD)) { | |||
228 | TemplateKind = TNK_Function_template; | |||
229 | ||||
230 | // We'll do this lookup again later. | |||
231 | R.suppressDiagnostics(); | |||
232 | } else { | |||
233 | assert(isa<ClassTemplateDecl>(TD) || isa<TemplateTemplateParmDecl>(TD) ||(static_cast <bool> (isa<ClassTemplateDecl>(TD) || isa<TemplateTemplateParmDecl>(TD) || isa<TypeAliasTemplateDecl >(TD) || isa<VarTemplateDecl>(TD) || isa<BuiltinTemplateDecl >(TD)) ? void (0) : __assert_fail ("isa<ClassTemplateDecl>(TD) || isa<TemplateTemplateParmDecl>(TD) || isa<TypeAliasTemplateDecl>(TD) || isa<VarTemplateDecl>(TD) || isa<BuiltinTemplateDecl>(TD)" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 235, __extension__ __PRETTY_FUNCTION__)) | |||
234 | isa<TypeAliasTemplateDecl>(TD) || isa<VarTemplateDecl>(TD) ||(static_cast <bool> (isa<ClassTemplateDecl>(TD) || isa<TemplateTemplateParmDecl>(TD) || isa<TypeAliasTemplateDecl >(TD) || isa<VarTemplateDecl>(TD) || isa<BuiltinTemplateDecl >(TD)) ? void (0) : __assert_fail ("isa<ClassTemplateDecl>(TD) || isa<TemplateTemplateParmDecl>(TD) || isa<TypeAliasTemplateDecl>(TD) || isa<VarTemplateDecl>(TD) || isa<BuiltinTemplateDecl>(TD)" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 235, __extension__ __PRETTY_FUNCTION__)) | |||
235 | isa<BuiltinTemplateDecl>(TD))(static_cast <bool> (isa<ClassTemplateDecl>(TD) || isa<TemplateTemplateParmDecl>(TD) || isa<TypeAliasTemplateDecl >(TD) || isa<VarTemplateDecl>(TD) || isa<BuiltinTemplateDecl >(TD)) ? void (0) : __assert_fail ("isa<ClassTemplateDecl>(TD) || isa<TemplateTemplateParmDecl>(TD) || isa<TypeAliasTemplateDecl>(TD) || isa<VarTemplateDecl>(TD) || isa<BuiltinTemplateDecl>(TD)" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 235, __extension__ __PRETTY_FUNCTION__)); | |||
236 | TemplateKind = | |||
237 | isa<VarTemplateDecl>(TD) ? TNK_Var_template : TNK_Type_template; | |||
238 | } | |||
239 | } | |||
240 | ||||
241 | TemplateResult = TemplateTy::make(Template); | |||
242 | return TemplateKind; | |||
243 | } | |||
244 | ||||
245 | bool Sema::isDeductionGuideName(Scope *S, const IdentifierInfo &Name, | |||
246 | SourceLocation NameLoc, | |||
247 | ParsedTemplateTy *Template) { | |||
248 | CXXScopeSpec SS; | |||
249 | bool MemberOfUnknownSpecialization = false; | |||
250 | ||||
251 | // We could use redeclaration lookup here, but we don't need to: the | |||
252 | // syntactic form of a deduction guide is enough to identify it even | |||
253 | // if we can't look up the template name at all. | |||
254 | LookupResult R(*this, DeclarationName(&Name), NameLoc, LookupOrdinaryName); | |||
255 | LookupTemplateName(R, S, SS, /*ObjectType*/QualType(), | |||
256 | /*EnteringContext*/false, MemberOfUnknownSpecialization); | |||
257 | ||||
258 | if (R.empty()) return false; | |||
259 | if (R.isAmbiguous()) { | |||
260 | // FIXME: Diagnose an ambiguity if we find at least one template. | |||
261 | R.suppressDiagnostics(); | |||
262 | return false; | |||
263 | } | |||
264 | ||||
265 | // We only treat template-names that name type templates as valid deduction | |||
266 | // guide names. | |||
267 | TemplateDecl *TD = R.getAsSingle<TemplateDecl>(); | |||
268 | if (!TD || !getAsTypeTemplateDecl(TD)) | |||
269 | return false; | |||
270 | ||||
271 | if (Template) | |||
272 | *Template = TemplateTy::make(TemplateName(TD)); | |||
273 | return true; | |||
274 | } | |||
275 | ||||
276 | bool Sema::DiagnoseUnknownTemplateName(const IdentifierInfo &II, | |||
277 | SourceLocation IILoc, | |||
278 | Scope *S, | |||
279 | const CXXScopeSpec *SS, | |||
280 | TemplateTy &SuggestedTemplate, | |||
281 | TemplateNameKind &SuggestedKind) { | |||
282 | // We can't recover unless there's a dependent scope specifier preceding the | |||
283 | // template name. | |||
284 | // FIXME: Typo correction? | |||
285 | if (!SS || !SS->isSet() || !isDependentScopeSpecifier(*SS) || | |||
286 | computeDeclContext(*SS)) | |||
287 | return false; | |||
288 | ||||
289 | // The code is missing a 'template' keyword prior to the dependent template | |||
290 | // name. | |||
291 | NestedNameSpecifier *Qualifier = (NestedNameSpecifier*)SS->getScopeRep(); | |||
292 | Diag(IILoc, diag::err_template_kw_missing) | |||
293 | << Qualifier << II.getName() | |||
294 | << FixItHint::CreateInsertion(IILoc, "template "); | |||
295 | SuggestedTemplate | |||
296 | = TemplateTy::make(Context.getDependentTemplateName(Qualifier, &II)); | |||
297 | SuggestedKind = TNK_Dependent_template_name; | |||
298 | return true; | |||
299 | } | |||
300 | ||||
301 | void Sema::LookupTemplateName(LookupResult &Found, | |||
302 | Scope *S, CXXScopeSpec &SS, | |||
303 | QualType ObjectType, | |||
304 | bool EnteringContext, | |||
305 | bool &MemberOfUnknownSpecialization) { | |||
306 | // Determine where to perform name lookup | |||
307 | MemberOfUnknownSpecialization = false; | |||
308 | DeclContext *LookupCtx = nullptr; | |||
309 | bool isDependent = false; | |||
310 | if (!ObjectType.isNull()) { | |||
311 | // This nested-name-specifier occurs in a member access expression, e.g., | |||
312 | // x->B::f, and we are looking into the type of the object. | |||
313 | assert(!SS.isSet() && "ObjectType and scope specifier cannot coexist")(static_cast <bool> (!SS.isSet() && "ObjectType and scope specifier cannot coexist" ) ? void (0) : __assert_fail ("!SS.isSet() && \"ObjectType and scope specifier cannot coexist\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 313, __extension__ __PRETTY_FUNCTION__)); | |||
314 | LookupCtx = computeDeclContext(ObjectType); | |||
315 | isDependent = ObjectType->isDependentType(); | |||
316 | assert((isDependent || !ObjectType->isIncompleteType() ||(static_cast <bool> ((isDependent || !ObjectType->isIncompleteType () || ObjectType->castAs<TagType>()->isBeingDefined ()) && "Caller should have completed object type") ? void (0) : __assert_fail ("(isDependent || !ObjectType->isIncompleteType() || ObjectType->castAs<TagType>()->isBeingDefined()) && \"Caller should have completed object type\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 318, __extension__ __PRETTY_FUNCTION__)) | |||
317 | ObjectType->castAs<TagType>()->isBeingDefined()) &&(static_cast <bool> ((isDependent || !ObjectType->isIncompleteType () || ObjectType->castAs<TagType>()->isBeingDefined ()) && "Caller should have completed object type") ? void (0) : __assert_fail ("(isDependent || !ObjectType->isIncompleteType() || ObjectType->castAs<TagType>()->isBeingDefined()) && \"Caller should have completed object type\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 318, __extension__ __PRETTY_FUNCTION__)) | |||
318 | "Caller should have completed object type")(static_cast <bool> ((isDependent || !ObjectType->isIncompleteType () || ObjectType->castAs<TagType>()->isBeingDefined ()) && "Caller should have completed object type") ? void (0) : __assert_fail ("(isDependent || !ObjectType->isIncompleteType() || ObjectType->castAs<TagType>()->isBeingDefined()) && \"Caller should have completed object type\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 318, __extension__ __PRETTY_FUNCTION__)); | |||
319 | ||||
320 | // Template names cannot appear inside an Objective-C class or object type. | |||
321 | if (ObjectType->isObjCObjectOrInterfaceType()) { | |||
322 | Found.clear(); | |||
323 | return; | |||
324 | } | |||
325 | } else if (SS.isSet()) { | |||
326 | // This nested-name-specifier occurs after another nested-name-specifier, | |||
327 | // so long into the context associated with the prior nested-name-specifier. | |||
328 | LookupCtx = computeDeclContext(SS, EnteringContext); | |||
329 | isDependent = isDependentScopeSpecifier(SS); | |||
330 | ||||
331 | // The declaration context must be complete. | |||
332 | if (LookupCtx && RequireCompleteDeclContext(SS, LookupCtx)) | |||
333 | return; | |||
334 | } | |||
335 | ||||
336 | bool ObjectTypeSearchedInScope = false; | |||
337 | bool AllowFunctionTemplatesInLookup = true; | |||
338 | if (LookupCtx) { | |||
339 | // Perform "qualified" name lookup into the declaration context we | |||
340 | // computed, which is either the type of the base of a member access | |||
341 | // expression or the declaration context associated with a prior | |||
342 | // nested-name-specifier. | |||
343 | LookupQualifiedName(Found, LookupCtx); | |||
344 | if (!ObjectType.isNull() && Found.empty()) { | |||
345 | // C++ [basic.lookup.classref]p1: | |||
346 | // In a class member access expression (5.2.5), if the . or -> token is | |||
347 | // immediately followed by an identifier followed by a <, the | |||
348 | // identifier must be looked up to determine whether the < is the | |||
349 | // beginning of a template argument list (14.2) or a less-than operator. | |||
350 | // The identifier is first looked up in the class of the object | |||
351 | // expression. If the identifier is not found, it is then looked up in | |||
352 | // the context of the entire postfix-expression and shall name a class | |||
353 | // or function template. | |||
354 | if (S) LookupName(Found, S); | |||
355 | ObjectTypeSearchedInScope = true; | |||
356 | AllowFunctionTemplatesInLookup = false; | |||
357 | } | |||
358 | } else if (isDependent && (!S || ObjectType.isNull())) { | |||
359 | // We cannot look into a dependent object type or nested nme | |||
360 | // specifier. | |||
361 | MemberOfUnknownSpecialization = true; | |||
362 | return; | |||
363 | } else { | |||
364 | // Perform unqualified name lookup in the current scope. | |||
365 | LookupName(Found, S); | |||
366 | ||||
367 | if (!ObjectType.isNull()) | |||
368 | AllowFunctionTemplatesInLookup = false; | |||
369 | } | |||
370 | ||||
371 | if (Found.empty() && !isDependent) { | |||
372 | // If we did not find any names, attempt to correct any typos. | |||
373 | DeclarationName Name = Found.getLookupName(); | |||
374 | Found.clear(); | |||
375 | // Simple filter callback that, for keywords, only accepts the C++ *_cast | |||
376 | auto FilterCCC = llvm::make_unique<CorrectionCandidateCallback>(); | |||
377 | FilterCCC->WantTypeSpecifiers = false; | |||
378 | FilterCCC->WantExpressionKeywords = false; | |||
379 | FilterCCC->WantRemainingKeywords = false; | |||
380 | FilterCCC->WantCXXNamedCasts = true; | |||
381 | if (TypoCorrection Corrected = CorrectTypo( | |||
382 | Found.getLookupNameInfo(), Found.getLookupKind(), S, &SS, | |||
383 | std::move(FilterCCC), CTK_ErrorRecovery, LookupCtx)) { | |||
384 | Found.setLookupName(Corrected.getCorrection()); | |||
385 | if (auto *ND = Corrected.getFoundDecl()) | |||
386 | Found.addDecl(ND); | |||
387 | FilterAcceptableTemplateNames(Found); | |||
388 | if (!Found.empty()) { | |||
389 | if (LookupCtx) { | |||
390 | std::string CorrectedStr(Corrected.getAsString(getLangOpts())); | |||
391 | bool DroppedSpecifier = Corrected.WillReplaceSpecifier() && | |||
392 | Name.getAsString() == CorrectedStr; | |||
393 | diagnoseTypo(Corrected, PDiag(diag::err_no_member_template_suggest) | |||
394 | << Name << LookupCtx << DroppedSpecifier | |||
395 | << SS.getRange()); | |||
396 | } else { | |||
397 | diagnoseTypo(Corrected, PDiag(diag::err_no_template_suggest) << Name); | |||
398 | } | |||
399 | } | |||
400 | } else { | |||
401 | Found.setLookupName(Name); | |||
402 | } | |||
403 | } | |||
404 | ||||
405 | FilterAcceptableTemplateNames(Found, AllowFunctionTemplatesInLookup); | |||
406 | if (Found.empty()) { | |||
407 | if (isDependent) | |||
408 | MemberOfUnknownSpecialization = true; | |||
409 | return; | |||
410 | } | |||
411 | ||||
412 | if (S && !ObjectType.isNull() && !ObjectTypeSearchedInScope && | |||
413 | !getLangOpts().CPlusPlus11) { | |||
414 | // C++03 [basic.lookup.classref]p1: | |||
415 | // [...] If the lookup in the class of the object expression finds a | |||
416 | // template, the name is also looked up in the context of the entire | |||
417 | // postfix-expression and [...] | |||
418 | // | |||
419 | // Note: C++11 does not perform this second lookup. | |||
420 | LookupResult FoundOuter(*this, Found.getLookupName(), Found.getNameLoc(), | |||
421 | LookupOrdinaryName); | |||
422 | LookupName(FoundOuter, S); | |||
423 | FilterAcceptableTemplateNames(FoundOuter, /*AllowFunctionTemplates=*/false); | |||
424 | ||||
425 | if (FoundOuter.empty()) { | |||
426 | // - if the name is not found, the name found in the class of the | |||
427 | // object expression is used, otherwise | |||
428 | } else if (!FoundOuter.getAsSingle<ClassTemplateDecl>() || | |||
429 | FoundOuter.isAmbiguous()) { | |||
430 | // - if the name is found in the context of the entire | |||
431 | // postfix-expression and does not name a class template, the name | |||
432 | // found in the class of the object expression is used, otherwise | |||
433 | FoundOuter.clear(); | |||
434 | } else if (!Found.isSuppressingDiagnostics()) { | |||
435 | // - if the name found is a class template, it must refer to the same | |||
436 | // entity as the one found in the class of the object expression, | |||
437 | // otherwise the program is ill-formed. | |||
438 | if (!Found.isSingleResult() || | |||
439 | Found.getFoundDecl()->getCanonicalDecl() | |||
440 | != FoundOuter.getFoundDecl()->getCanonicalDecl()) { | |||
441 | Diag(Found.getNameLoc(), | |||
442 | diag::ext_nested_name_member_ref_lookup_ambiguous) | |||
443 | << Found.getLookupName() | |||
444 | << ObjectType; | |||
445 | Diag(Found.getRepresentativeDecl()->getLocation(), | |||
446 | diag::note_ambig_member_ref_object_type) | |||
447 | << ObjectType; | |||
448 | Diag(FoundOuter.getFoundDecl()->getLocation(), | |||
449 | diag::note_ambig_member_ref_scope); | |||
450 | ||||
451 | // Recover by taking the template that we found in the object | |||
452 | // expression's type. | |||
453 | } | |||
454 | } | |||
455 | } | |||
456 | } | |||
457 | ||||
458 | void Sema::diagnoseExprIntendedAsTemplateName(Scope *S, ExprResult TemplateName, | |||
459 | SourceLocation Less, | |||
460 | SourceLocation Greater) { | |||
461 | if (TemplateName.isInvalid()) | |||
462 | return; | |||
463 | ||||
464 | DeclarationNameInfo NameInfo; | |||
465 | CXXScopeSpec SS; | |||
466 | LookupNameKind LookupKind; | |||
467 | ||||
468 | DeclContext *LookupCtx = nullptr; | |||
469 | NamedDecl *Found = nullptr; | |||
470 | ||||
471 | // Figure out what name we looked up. | |||
472 | if (auto *ME = dyn_cast<MemberExpr>(TemplateName.get())) { | |||
473 | NameInfo = ME->getMemberNameInfo(); | |||
474 | SS.Adopt(ME->getQualifierLoc()); | |||
475 | LookupKind = LookupMemberName; | |||
476 | LookupCtx = ME->getBase()->getType()->getAsCXXRecordDecl(); | |||
477 | Found = ME->getMemberDecl(); | |||
478 | } else { | |||
479 | auto *DRE = cast<DeclRefExpr>(TemplateName.get()); | |||
480 | NameInfo = DRE->getNameInfo(); | |||
481 | SS.Adopt(DRE->getQualifierLoc()); | |||
482 | LookupKind = LookupOrdinaryName; | |||
483 | Found = DRE->getFoundDecl(); | |||
484 | } | |||
485 | ||||
486 | // Try to correct the name by looking for templates and C++ named casts. | |||
487 | struct TemplateCandidateFilter : CorrectionCandidateCallback { | |||
488 | TemplateCandidateFilter() { | |||
489 | WantTypeSpecifiers = false; | |||
490 | WantExpressionKeywords = false; | |||
491 | WantRemainingKeywords = false; | |||
492 | WantCXXNamedCasts = true; | |||
493 | }; | |||
494 | bool ValidateCandidate(const TypoCorrection &Candidate) override { | |||
495 | if (auto *ND = Candidate.getCorrectionDecl()) | |||
496 | return isAcceptableTemplateName(ND->getASTContext(), ND, true); | |||
497 | return Candidate.isKeyword(); | |||
498 | } | |||
499 | }; | |||
500 | ||||
501 | DeclarationName Name = NameInfo.getName(); | |||
502 | if (TypoCorrection Corrected = | |||
503 | CorrectTypo(NameInfo, LookupKind, S, &SS, | |||
504 | llvm::make_unique<TemplateCandidateFilter>(), | |||
505 | CTK_ErrorRecovery, LookupCtx)) { | |||
506 | auto *ND = Corrected.getFoundDecl(); | |||
507 | if (ND) | |||
508 | ND = isAcceptableTemplateName(Context, ND, | |||
509 | /*AllowFunctionTemplates*/ true); | |||
510 | if (ND || Corrected.isKeyword()) { | |||
511 | if (LookupCtx) { | |||
512 | std::string CorrectedStr(Corrected.getAsString(getLangOpts())); | |||
513 | bool DroppedSpecifier = Corrected.WillReplaceSpecifier() && | |||
514 | Name.getAsString() == CorrectedStr; | |||
515 | diagnoseTypo(Corrected, | |||
516 | PDiag(diag::err_non_template_in_member_template_id_suggest) | |||
517 | << Name << LookupCtx << DroppedSpecifier | |||
518 | << SS.getRange(), false); | |||
519 | } else { | |||
520 | diagnoseTypo(Corrected, | |||
521 | PDiag(diag::err_non_template_in_template_id_suggest) | |||
522 | << Name, false); | |||
523 | } | |||
524 | if (Found) | |||
525 | Diag(Found->getLocation(), | |||
526 | diag::note_non_template_in_template_id_found); | |||
527 | return; | |||
528 | } | |||
529 | } | |||
530 | ||||
531 | Diag(NameInfo.getLoc(), diag::err_non_template_in_template_id) | |||
532 | << Name << SourceRange(Less, Greater); | |||
533 | if (Found) | |||
534 | Diag(Found->getLocation(), diag::note_non_template_in_template_id_found); | |||
535 | } | |||
536 | ||||
537 | /// ActOnDependentIdExpression - Handle a dependent id-expression that | |||
538 | /// was just parsed. This is only possible with an explicit scope | |||
539 | /// specifier naming a dependent type. | |||
540 | ExprResult | |||
541 | Sema::ActOnDependentIdExpression(const CXXScopeSpec &SS, | |||
542 | SourceLocation TemplateKWLoc, | |||
543 | const DeclarationNameInfo &NameInfo, | |||
544 | bool isAddressOfOperand, | |||
545 | const TemplateArgumentListInfo *TemplateArgs) { | |||
546 | DeclContext *DC = getFunctionLevelDeclContext(); | |||
547 | ||||
548 | // C++11 [expr.prim.general]p12: | |||
549 | // An id-expression that denotes a non-static data member or non-static | |||
550 | // member function of a class can only be used: | |||
551 | // (...) | |||
552 | // - if that id-expression denotes a non-static data member and it | |||
553 | // appears in an unevaluated operand. | |||
554 | // | |||
555 | // If this might be the case, form a DependentScopeDeclRefExpr instead of a | |||
556 | // CXXDependentScopeMemberExpr. The former can instantiate to either | |||
557 | // DeclRefExpr or MemberExpr depending on lookup results, while the latter is | |||
558 | // always a MemberExpr. | |||
559 | bool MightBeCxx11UnevalField = | |||
560 | getLangOpts().CPlusPlus11 && isUnevaluatedContext(); | |||
561 | ||||
562 | // Check if the nested name specifier is an enum type. | |||
563 | bool IsEnum = false; | |||
564 | if (NestedNameSpecifier *NNS = SS.getScopeRep()) | |||
565 | IsEnum = dyn_cast_or_null<EnumType>(NNS->getAsType()); | |||
566 | ||||
567 | if (!MightBeCxx11UnevalField && !isAddressOfOperand && !IsEnum && | |||
568 | isa<CXXMethodDecl>(DC) && cast<CXXMethodDecl>(DC)->isInstance()) { | |||
569 | QualType ThisType = cast<CXXMethodDecl>(DC)->getThisType(Context); | |||
570 | ||||
571 | // Since the 'this' expression is synthesized, we don't need to | |||
572 | // perform the double-lookup check. | |||
573 | NamedDecl *FirstQualifierInScope = nullptr; | |||
574 | ||||
575 | return CXXDependentScopeMemberExpr::Create( | |||
576 | Context, /*This*/ nullptr, ThisType, /*IsArrow*/ true, | |||
577 | /*Op*/ SourceLocation(), SS.getWithLocInContext(Context), TemplateKWLoc, | |||
578 | FirstQualifierInScope, NameInfo, TemplateArgs); | |||
579 | } | |||
580 | ||||
581 | return BuildDependentDeclRefExpr(SS, TemplateKWLoc, NameInfo, TemplateArgs); | |||
582 | } | |||
583 | ||||
584 | ExprResult | |||
585 | Sema::BuildDependentDeclRefExpr(const CXXScopeSpec &SS, | |||
586 | SourceLocation TemplateKWLoc, | |||
587 | const DeclarationNameInfo &NameInfo, | |||
588 | const TemplateArgumentListInfo *TemplateArgs) { | |||
589 | return DependentScopeDeclRefExpr::Create( | |||
590 | Context, SS.getWithLocInContext(Context), TemplateKWLoc, NameInfo, | |||
591 | TemplateArgs); | |||
592 | } | |||
593 | ||||
594 | ||||
595 | /// Determine whether we would be unable to instantiate this template (because | |||
596 | /// it either has no definition, or is in the process of being instantiated). | |||
597 | bool Sema::DiagnoseUninstantiableTemplate(SourceLocation PointOfInstantiation, | |||
598 | NamedDecl *Instantiation, | |||
599 | bool InstantiatedFromMember, | |||
600 | const NamedDecl *Pattern, | |||
601 | const NamedDecl *PatternDef, | |||
602 | TemplateSpecializationKind TSK, | |||
603 | bool Complain /*= true*/) { | |||
604 | assert(isa<TagDecl>(Instantiation) || isa<FunctionDecl>(Instantiation) ||(static_cast <bool> (isa<TagDecl>(Instantiation) || isa<FunctionDecl>(Instantiation) || isa<VarDecl> (Instantiation)) ? void (0) : __assert_fail ("isa<TagDecl>(Instantiation) || isa<FunctionDecl>(Instantiation) || isa<VarDecl>(Instantiation)" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 605, __extension__ __PRETTY_FUNCTION__)) | |||
605 | isa<VarDecl>(Instantiation))(static_cast <bool> (isa<TagDecl>(Instantiation) || isa<FunctionDecl>(Instantiation) || isa<VarDecl> (Instantiation)) ? void (0) : __assert_fail ("isa<TagDecl>(Instantiation) || isa<FunctionDecl>(Instantiation) || isa<VarDecl>(Instantiation)" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 605, __extension__ __PRETTY_FUNCTION__)); | |||
606 | ||||
607 | bool IsEntityBeingDefined = false; | |||
608 | if (const TagDecl *TD = dyn_cast_or_null<TagDecl>(PatternDef)) | |||
609 | IsEntityBeingDefined = TD->isBeingDefined(); | |||
610 | ||||
611 | if (PatternDef && !IsEntityBeingDefined) { | |||
612 | NamedDecl *SuggestedDef = nullptr; | |||
613 | if (!hasVisibleDefinition(const_cast<NamedDecl*>(PatternDef), &SuggestedDef, | |||
614 | /*OnlyNeedComplete*/false)) { | |||
615 | // If we're allowed to diagnose this and recover, do so. | |||
616 | bool Recover = Complain && !isSFINAEContext(); | |||
617 | if (Complain) | |||
618 | diagnoseMissingImport(PointOfInstantiation, SuggestedDef, | |||
619 | Sema::MissingImportKind::Definition, Recover); | |||
620 | return !Recover; | |||
621 | } | |||
622 | return false; | |||
623 | } | |||
624 | ||||
625 | if (!Complain || (PatternDef && PatternDef->isInvalidDecl())) | |||
626 | return true; | |||
627 | ||||
628 | llvm::Optional<unsigned> Note; | |||
629 | QualType InstantiationTy; | |||
630 | if (TagDecl *TD = dyn_cast<TagDecl>(Instantiation)) | |||
631 | InstantiationTy = Context.getTypeDeclType(TD); | |||
632 | if (PatternDef) { | |||
633 | Diag(PointOfInstantiation, | |||
634 | diag::err_template_instantiate_within_definition) | |||
635 | << /*implicit|explicit*/(TSK != TSK_ImplicitInstantiation) | |||
636 | << InstantiationTy; | |||
637 | // Not much point in noting the template declaration here, since | |||
638 | // we're lexically inside it. | |||
639 | Instantiation->setInvalidDecl(); | |||
640 | } else if (InstantiatedFromMember) { | |||
641 | if (isa<FunctionDecl>(Instantiation)) { | |||
642 | Diag(PointOfInstantiation, | |||
643 | diag::err_explicit_instantiation_undefined_member) | |||
644 | << /*member function*/ 1 << Instantiation->getDeclName() | |||
645 | << Instantiation->getDeclContext(); | |||
646 | Note = diag::note_explicit_instantiation_here; | |||
647 | } else { | |||
648 | assert(isa<TagDecl>(Instantiation) && "Must be a TagDecl!")(static_cast <bool> (isa<TagDecl>(Instantiation) && "Must be a TagDecl!") ? void (0) : __assert_fail ("isa<TagDecl>(Instantiation) && \"Must be a TagDecl!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 648, __extension__ __PRETTY_FUNCTION__)); | |||
649 | Diag(PointOfInstantiation, | |||
650 | diag::err_implicit_instantiate_member_undefined) | |||
651 | << InstantiationTy; | |||
652 | Note = diag::note_member_declared_at; | |||
653 | } | |||
654 | } else { | |||
655 | if (isa<FunctionDecl>(Instantiation)) { | |||
656 | Diag(PointOfInstantiation, | |||
657 | diag::err_explicit_instantiation_undefined_func_template) | |||
658 | << Pattern; | |||
659 | Note = diag::note_explicit_instantiation_here; | |||
660 | } else if (isa<TagDecl>(Instantiation)) { | |||
661 | Diag(PointOfInstantiation, diag::err_template_instantiate_undefined) | |||
662 | << (TSK != TSK_ImplicitInstantiation) | |||
663 | << InstantiationTy; | |||
664 | Note = diag::note_template_decl_here; | |||
665 | } else { | |||
666 | assert(isa<VarDecl>(Instantiation) && "Must be a VarDecl!")(static_cast <bool> (isa<VarDecl>(Instantiation) && "Must be a VarDecl!") ? void (0) : __assert_fail ("isa<VarDecl>(Instantiation) && \"Must be a VarDecl!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 666, __extension__ __PRETTY_FUNCTION__)); | |||
667 | if (isa<VarTemplateSpecializationDecl>(Instantiation)) { | |||
668 | Diag(PointOfInstantiation, | |||
669 | diag::err_explicit_instantiation_undefined_var_template) | |||
670 | << Instantiation; | |||
671 | Instantiation->setInvalidDecl(); | |||
672 | } else | |||
673 | Diag(PointOfInstantiation, | |||
674 | diag::err_explicit_instantiation_undefined_member) | |||
675 | << /*static data member*/ 2 << Instantiation->getDeclName() | |||
676 | << Instantiation->getDeclContext(); | |||
677 | Note = diag::note_explicit_instantiation_here; | |||
678 | } | |||
679 | } | |||
680 | if (Note) // Diagnostics were emitted. | |||
681 | Diag(Pattern->getLocation(), Note.getValue()); | |||
682 | ||||
683 | // In general, Instantiation isn't marked invalid to get more than one | |||
684 | // error for multiple undefined instantiations. But the code that does | |||
685 | // explicit declaration -> explicit definition conversion can't handle | |||
686 | // invalid declarations, so mark as invalid in that case. | |||
687 | if (TSK == TSK_ExplicitInstantiationDeclaration) | |||
688 | Instantiation->setInvalidDecl(); | |||
689 | return true; | |||
690 | } | |||
691 | ||||
692 | /// DiagnoseTemplateParameterShadow - Produce a diagnostic complaining | |||
693 | /// that the template parameter 'PrevDecl' is being shadowed by a new | |||
694 | /// declaration at location Loc. Returns true to indicate that this is | |||
695 | /// an error, and false otherwise. | |||
696 | void Sema::DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl) { | |||
697 | assert(PrevDecl->isTemplateParameter() && "Not a template parameter")(static_cast <bool> (PrevDecl->isTemplateParameter() && "Not a template parameter") ? void (0) : __assert_fail ("PrevDecl->isTemplateParameter() && \"Not a template parameter\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 697, __extension__ __PRETTY_FUNCTION__)); | |||
698 | ||||
699 | // Microsoft Visual C++ permits template parameters to be shadowed. | |||
700 | if (getLangOpts().MicrosoftExt) | |||
701 | return; | |||
702 | ||||
703 | // C++ [temp.local]p4: | |||
704 | // A template-parameter shall not be redeclared within its | |||
705 | // scope (including nested scopes). | |||
706 | Diag(Loc, diag::err_template_param_shadow) | |||
707 | << cast<NamedDecl>(PrevDecl)->getDeclName(); | |||
708 | Diag(PrevDecl->getLocation(), diag::note_template_param_here); | |||
709 | } | |||
710 | ||||
711 | /// AdjustDeclIfTemplate - If the given decl happens to be a template, reset | |||
712 | /// the parameter D to reference the templated declaration and return a pointer | |||
713 | /// to the template declaration. Otherwise, do nothing to D and return null. | |||
714 | TemplateDecl *Sema::AdjustDeclIfTemplate(Decl *&D) { | |||
715 | if (TemplateDecl *Temp = dyn_cast_or_null<TemplateDecl>(D)) { | |||
716 | D = Temp->getTemplatedDecl(); | |||
717 | return Temp; | |||
718 | } | |||
719 | return nullptr; | |||
720 | } | |||
721 | ||||
722 | ParsedTemplateArgument ParsedTemplateArgument::getTemplatePackExpansion( | |||
723 | SourceLocation EllipsisLoc) const { | |||
724 | assert(Kind == Template &&(static_cast <bool> (Kind == Template && "Only template template arguments can be pack expansions here" ) ? void (0) : __assert_fail ("Kind == Template && \"Only template template arguments can be pack expansions here\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 725, __extension__ __PRETTY_FUNCTION__)) | |||
725 | "Only template template arguments can be pack expansions here")(static_cast <bool> (Kind == Template && "Only template template arguments can be pack expansions here" ) ? void (0) : __assert_fail ("Kind == Template && \"Only template template arguments can be pack expansions here\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 725, __extension__ __PRETTY_FUNCTION__)); | |||
726 | assert(getAsTemplate().get().containsUnexpandedParameterPack() &&(static_cast <bool> (getAsTemplate().get().containsUnexpandedParameterPack () && "Template template argument pack expansion without packs" ) ? void (0) : __assert_fail ("getAsTemplate().get().containsUnexpandedParameterPack() && \"Template template argument pack expansion without packs\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 727, __extension__ __PRETTY_FUNCTION__)) | |||
727 | "Template template argument pack expansion without packs")(static_cast <bool> (getAsTemplate().get().containsUnexpandedParameterPack () && "Template template argument pack expansion without packs" ) ? void (0) : __assert_fail ("getAsTemplate().get().containsUnexpandedParameterPack() && \"Template template argument pack expansion without packs\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 727, __extension__ __PRETTY_FUNCTION__)); | |||
728 | ParsedTemplateArgument Result(*this); | |||
729 | Result.EllipsisLoc = EllipsisLoc; | |||
730 | return Result; | |||
731 | } | |||
732 | ||||
733 | static TemplateArgumentLoc translateTemplateArgument(Sema &SemaRef, | |||
734 | const ParsedTemplateArgument &Arg) { | |||
735 | ||||
736 | switch (Arg.getKind()) { | |||
737 | case ParsedTemplateArgument::Type: { | |||
738 | TypeSourceInfo *DI; | |||
739 | QualType T = SemaRef.GetTypeFromParser(Arg.getAsType(), &DI); | |||
740 | if (!DI) | |||
741 | DI = SemaRef.Context.getTrivialTypeSourceInfo(T, Arg.getLocation()); | |||
742 | return TemplateArgumentLoc(TemplateArgument(T), DI); | |||
743 | } | |||
744 | ||||
745 | case ParsedTemplateArgument::NonType: { | |||
746 | Expr *E = static_cast<Expr *>(Arg.getAsExpr()); | |||
747 | return TemplateArgumentLoc(TemplateArgument(E), E); | |||
748 | } | |||
749 | ||||
750 | case ParsedTemplateArgument::Template: { | |||
751 | TemplateName Template = Arg.getAsTemplate().get(); | |||
752 | TemplateArgument TArg; | |||
753 | if (Arg.getEllipsisLoc().isValid()) | |||
754 | TArg = TemplateArgument(Template, Optional<unsigned int>()); | |||
755 | else | |||
756 | TArg = Template; | |||
757 | return TemplateArgumentLoc(TArg, | |||
758 | Arg.getScopeSpec().getWithLocInContext( | |||
759 | SemaRef.Context), | |||
760 | Arg.getLocation(), | |||
761 | Arg.getEllipsisLoc()); | |||
762 | } | |||
763 | } | |||
764 | ||||
765 | llvm_unreachable("Unhandled parsed template argument")::llvm::llvm_unreachable_internal("Unhandled parsed template argument" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 765); | |||
766 | } | |||
767 | ||||
768 | /// \brief Translates template arguments as provided by the parser | |||
769 | /// into template arguments used by semantic analysis. | |||
770 | void Sema::translateTemplateArguments(const ASTTemplateArgsPtr &TemplateArgsIn, | |||
771 | TemplateArgumentListInfo &TemplateArgs) { | |||
772 | for (unsigned I = 0, Last = TemplateArgsIn.size(); I != Last; ++I) | |||
773 | TemplateArgs.addArgument(translateTemplateArgument(*this, | |||
774 | TemplateArgsIn[I])); | |||
775 | } | |||
776 | ||||
777 | static void maybeDiagnoseTemplateParameterShadow(Sema &SemaRef, Scope *S, | |||
778 | SourceLocation Loc, | |||
779 | IdentifierInfo *Name) { | |||
780 | NamedDecl *PrevDecl = SemaRef.LookupSingleName( | |||
781 | S, Name, Loc, Sema::LookupOrdinaryName, Sema::ForVisibleRedeclaration); | |||
782 | if (PrevDecl && PrevDecl->isTemplateParameter()) | |||
783 | SemaRef.DiagnoseTemplateParameterShadow(Loc, PrevDecl); | |||
784 | } | |||
785 | ||||
786 | /// Convert a parsed type into a parsed template argument. This is mostly | |||
787 | /// trivial, except that we may have parsed a C++17 deduced class template | |||
788 | /// specialization type, in which case we should form a template template | |||
789 | /// argument instead of a type template argument. | |||
790 | ParsedTemplateArgument Sema::ActOnTemplateTypeArgument(TypeResult ParsedType) { | |||
791 | TypeSourceInfo *TInfo; | |||
792 | QualType T = GetTypeFromParser(ParsedType.get(), &TInfo); | |||
793 | if (T.isNull()) | |||
794 | return ParsedTemplateArgument(); | |||
795 | assert(TInfo && "template argument with no location")(static_cast <bool> (TInfo && "template argument with no location" ) ? void (0) : __assert_fail ("TInfo && \"template argument with no location\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 795, __extension__ __PRETTY_FUNCTION__)); | |||
796 | ||||
797 | // If we might have formed a deduced template specialization type, convert | |||
798 | // it to a template template argument. | |||
799 | if (getLangOpts().CPlusPlus17) { | |||
800 | TypeLoc TL = TInfo->getTypeLoc(); | |||
801 | SourceLocation EllipsisLoc; | |||
802 | if (auto PET = TL.getAs<PackExpansionTypeLoc>()) { | |||
803 | EllipsisLoc = PET.getEllipsisLoc(); | |||
804 | TL = PET.getPatternLoc(); | |||
805 | } | |||
806 | ||||
807 | CXXScopeSpec SS; | |||
808 | if (auto ET = TL.getAs<ElaboratedTypeLoc>()) { | |||
809 | SS.Adopt(ET.getQualifierLoc()); | |||
810 | TL = ET.getNamedTypeLoc(); | |||
811 | } | |||
812 | ||||
813 | if (auto DTST = TL.getAs<DeducedTemplateSpecializationTypeLoc>()) { | |||
814 | TemplateName Name = DTST.getTypePtr()->getTemplateName(); | |||
815 | if (SS.isSet()) | |||
816 | Name = Context.getQualifiedTemplateName(SS.getScopeRep(), | |||
817 | /*HasTemplateKeyword*/ false, | |||
818 | Name.getAsTemplateDecl()); | |||
819 | ParsedTemplateArgument Result(SS, TemplateTy::make(Name), | |||
820 | DTST.getTemplateNameLoc()); | |||
821 | if (EllipsisLoc.isValid()) | |||
822 | Result = Result.getTemplatePackExpansion(EllipsisLoc); | |||
823 | return Result; | |||
824 | } | |||
825 | } | |||
826 | ||||
827 | // This is a normal type template argument. Note, if the type template | |||
828 | // argument is an injected-class-name for a template, it has a dual nature | |||
829 | // and can be used as either a type or a template. We handle that in | |||
830 | // convertTypeTemplateArgumentToTemplate. | |||
831 | return ParsedTemplateArgument(ParsedTemplateArgument::Type, | |||
832 | ParsedType.get().getAsOpaquePtr(), | |||
833 | TInfo->getTypeLoc().getLocStart()); | |||
834 | } | |||
835 | ||||
836 | /// ActOnTypeParameter - Called when a C++ template type parameter | |||
837 | /// (e.g., "typename T") has been parsed. Typename specifies whether | |||
838 | /// the keyword "typename" was used to declare the type parameter | |||
839 | /// (otherwise, "class" was used), and KeyLoc is the location of the | |||
840 | /// "class" or "typename" keyword. ParamName is the name of the | |||
841 | /// parameter (NULL indicates an unnamed template parameter) and | |||
842 | /// ParamNameLoc is the location of the parameter name (if any). | |||
843 | /// If the type parameter has a default argument, it will be added | |||
844 | /// later via ActOnTypeParameterDefault. | |||
845 | NamedDecl *Sema::ActOnTypeParameter(Scope *S, bool Typename, | |||
846 | SourceLocation EllipsisLoc, | |||
847 | SourceLocation KeyLoc, | |||
848 | IdentifierInfo *ParamName, | |||
849 | SourceLocation ParamNameLoc, | |||
850 | unsigned Depth, unsigned Position, | |||
851 | SourceLocation EqualLoc, | |||
852 | ParsedType DefaultArg) { | |||
853 | assert(S->isTemplateParamScope() &&(static_cast <bool> (S->isTemplateParamScope() && "Template type parameter not in template parameter scope!") ? void (0) : __assert_fail ("S->isTemplateParamScope() && \"Template type parameter not in template parameter scope!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 854, __extension__ __PRETTY_FUNCTION__)) | |||
854 | "Template type parameter not in template parameter scope!")(static_cast <bool> (S->isTemplateParamScope() && "Template type parameter not in template parameter scope!") ? void (0) : __assert_fail ("S->isTemplateParamScope() && \"Template type parameter not in template parameter scope!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 854, __extension__ __PRETTY_FUNCTION__)); | |||
855 | ||||
856 | SourceLocation Loc = ParamNameLoc; | |||
857 | if (!ParamName) | |||
858 | Loc = KeyLoc; | |||
859 | ||||
860 | bool IsParameterPack = EllipsisLoc.isValid(); | |||
861 | TemplateTypeParmDecl *Param | |||
862 | = TemplateTypeParmDecl::Create(Context, Context.getTranslationUnitDecl(), | |||
863 | KeyLoc, Loc, Depth, Position, ParamName, | |||
864 | Typename, IsParameterPack); | |||
865 | Param->setAccess(AS_public); | |||
866 | ||||
867 | if (ParamName) { | |||
868 | maybeDiagnoseTemplateParameterShadow(*this, S, ParamNameLoc, ParamName); | |||
869 | ||||
870 | // Add the template parameter into the current scope. | |||
871 | S->AddDecl(Param); | |||
872 | IdResolver.AddDecl(Param); | |||
873 | } | |||
874 | ||||
875 | // C++0x [temp.param]p9: | |||
876 | // A default template-argument may be specified for any kind of | |||
877 | // template-parameter that is not a template parameter pack. | |||
878 | if (DefaultArg && IsParameterPack) { | |||
879 | Diag(EqualLoc, diag::err_template_param_pack_default_arg); | |||
880 | DefaultArg = nullptr; | |||
881 | } | |||
882 | ||||
883 | // Handle the default argument, if provided. | |||
884 | if (DefaultArg) { | |||
885 | TypeSourceInfo *DefaultTInfo; | |||
886 | GetTypeFromParser(DefaultArg, &DefaultTInfo); | |||
887 | ||||
888 | assert(DefaultTInfo && "expected source information for type")(static_cast <bool> (DefaultTInfo && "expected source information for type" ) ? void (0) : __assert_fail ("DefaultTInfo && \"expected source information for type\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 888, __extension__ __PRETTY_FUNCTION__)); | |||
889 | ||||
890 | // Check for unexpanded parameter packs. | |||
891 | if (DiagnoseUnexpandedParameterPack(Loc, DefaultTInfo, | |||
892 | UPPC_DefaultArgument)) | |||
893 | return Param; | |||
894 | ||||
895 | // Check the template argument itself. | |||
896 | if (CheckTemplateArgument(Param, DefaultTInfo)) { | |||
897 | Param->setInvalidDecl(); | |||
898 | return Param; | |||
899 | } | |||
900 | ||||
901 | Param->setDefaultArgument(DefaultTInfo); | |||
902 | } | |||
903 | ||||
904 | return Param; | |||
905 | } | |||
906 | ||||
907 | /// \brief Check that the type of a non-type template parameter is | |||
908 | /// well-formed. | |||
909 | /// | |||
910 | /// \returns the (possibly-promoted) parameter type if valid; | |||
911 | /// otherwise, produces a diagnostic and returns a NULL type. | |||
912 | QualType Sema::CheckNonTypeTemplateParameterType(TypeSourceInfo *&TSI, | |||
913 | SourceLocation Loc) { | |||
914 | if (TSI->getType()->isUndeducedType()) { | |||
915 | // C++1z [temp.dep.expr]p3: | |||
916 | // An id-expression is type-dependent if it contains | |||
917 | // - an identifier associated by name lookup with a non-type | |||
918 | // template-parameter declared with a type that contains a | |||
919 | // placeholder type (7.1.7.4), | |||
920 | TSI = SubstAutoTypeSourceInfo(TSI, Context.DependentTy); | |||
921 | } | |||
922 | ||||
923 | return CheckNonTypeTemplateParameterType(TSI->getType(), Loc); | |||
924 | } | |||
925 | ||||
926 | QualType Sema::CheckNonTypeTemplateParameterType(QualType T, | |||
927 | SourceLocation Loc) { | |||
928 | // We don't allow variably-modified types as the type of non-type template | |||
929 | // parameters. | |||
930 | if (T->isVariablyModifiedType()) { | |||
931 | Diag(Loc, diag::err_variably_modified_nontype_template_param) | |||
932 | << T; | |||
933 | return QualType(); | |||
934 | } | |||
935 | ||||
936 | // C++ [temp.param]p4: | |||
937 | // | |||
938 | // A non-type template-parameter shall have one of the following | |||
939 | // (optionally cv-qualified) types: | |||
940 | // | |||
941 | // -- integral or enumeration type, | |||
942 | if (T->isIntegralOrEnumerationType() || | |||
943 | // -- pointer to object or pointer to function, | |||
944 | T->isPointerType() || | |||
945 | // -- reference to object or reference to function, | |||
946 | T->isReferenceType() || | |||
947 | // -- pointer to member, | |||
948 | T->isMemberPointerType() || | |||
949 | // -- std::nullptr_t. | |||
950 | T->isNullPtrType() || | |||
951 | // If T is a dependent type, we can't do the check now, so we | |||
952 | // assume that it is well-formed. | |||
953 | T->isDependentType() || | |||
954 | // Allow use of auto in template parameter declarations. | |||
955 | T->isUndeducedType()) { | |||
956 | // C++ [temp.param]p5: The top-level cv-qualifiers on the template-parameter | |||
957 | // are ignored when determining its type. | |||
958 | return T.getUnqualifiedType(); | |||
959 | } | |||
960 | ||||
961 | // C++ [temp.param]p8: | |||
962 | // | |||
963 | // A non-type template-parameter of type "array of T" or | |||
964 | // "function returning T" is adjusted to be of type "pointer to | |||
965 | // T" or "pointer to function returning T", respectively. | |||
966 | else if (T->isArrayType() || T->isFunctionType()) | |||
967 | return Context.getDecayedType(T); | |||
968 | ||||
969 | Diag(Loc, diag::err_template_nontype_parm_bad_type) | |||
970 | << T; | |||
971 | ||||
972 | return QualType(); | |||
973 | } | |||
974 | ||||
975 | NamedDecl *Sema::ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, | |||
976 | unsigned Depth, | |||
977 | unsigned Position, | |||
978 | SourceLocation EqualLoc, | |||
979 | Expr *Default) { | |||
980 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | |||
981 | ||||
982 | // Check that we have valid decl-specifiers specified. | |||
983 | auto CheckValidDeclSpecifiers = [this, &D] { | |||
984 | // C++ [temp.param] | |||
985 | // p1 | |||
986 | // template-parameter: | |||
987 | // ... | |||
988 | // parameter-declaration | |||
989 | // p2 | |||
990 | // ... A storage class shall not be specified in a template-parameter | |||
991 | // declaration. | |||
992 | // [dcl.typedef]p1: | |||
993 | // The typedef specifier [...] shall not be used in the decl-specifier-seq | |||
994 | // of a parameter-declaration | |||
995 | const DeclSpec &DS = D.getDeclSpec(); | |||
996 | auto EmitDiag = [this](SourceLocation Loc) { | |||
997 | Diag(Loc, diag::err_invalid_decl_specifier_in_nontype_parm) | |||
998 | << FixItHint::CreateRemoval(Loc); | |||
999 | }; | |||
1000 | if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified) | |||
1001 | EmitDiag(DS.getStorageClassSpecLoc()); | |||
1002 | ||||
1003 | if (DS.getThreadStorageClassSpec() != TSCS_unspecified) | |||
1004 | EmitDiag(DS.getThreadStorageClassSpecLoc()); | |||
1005 | ||||
1006 | // [dcl.inline]p1: | |||
1007 | // The inline specifier can be applied only to the declaration or | |||
1008 | // definition of a variable or function. | |||
1009 | ||||
1010 | if (DS.isInlineSpecified()) | |||
1011 | EmitDiag(DS.getInlineSpecLoc()); | |||
1012 | ||||
1013 | // [dcl.constexpr]p1: | |||
1014 | // The constexpr specifier shall be applied only to the definition of a | |||
1015 | // variable or variable template or the declaration of a function or | |||
1016 | // function template. | |||
1017 | ||||
1018 | if (DS.isConstexprSpecified()) | |||
1019 | EmitDiag(DS.getConstexprSpecLoc()); | |||
1020 | ||||
1021 | // [dcl.fct.spec]p1: | |||
1022 | // Function-specifiers can be used only in function declarations. | |||
1023 | ||||
1024 | if (DS.isVirtualSpecified()) | |||
1025 | EmitDiag(DS.getVirtualSpecLoc()); | |||
1026 | ||||
1027 | if (DS.isExplicitSpecified()) | |||
1028 | EmitDiag(DS.getExplicitSpecLoc()); | |||
1029 | ||||
1030 | if (DS.isNoreturnSpecified()) | |||
1031 | EmitDiag(DS.getNoreturnSpecLoc()); | |||
1032 | }; | |||
1033 | ||||
1034 | CheckValidDeclSpecifiers(); | |||
1035 | ||||
1036 | if (TInfo->getType()->isUndeducedType()) { | |||
1037 | Diag(D.getIdentifierLoc(), | |||
1038 | diag::warn_cxx14_compat_template_nontype_parm_auto_type) | |||
1039 | << QualType(TInfo->getType()->getContainedAutoType(), 0); | |||
1040 | } | |||
1041 | ||||
1042 | assert(S->isTemplateParamScope() &&(static_cast <bool> (S->isTemplateParamScope() && "Non-type template parameter not in template parameter scope!" ) ? void (0) : __assert_fail ("S->isTemplateParamScope() && \"Non-type template parameter not in template parameter scope!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 1043, __extension__ __PRETTY_FUNCTION__)) | |||
1043 | "Non-type template parameter not in template parameter scope!")(static_cast <bool> (S->isTemplateParamScope() && "Non-type template parameter not in template parameter scope!" ) ? void (0) : __assert_fail ("S->isTemplateParamScope() && \"Non-type template parameter not in template parameter scope!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 1043, __extension__ __PRETTY_FUNCTION__)); | |||
1044 | bool Invalid = false; | |||
1045 | ||||
1046 | QualType T = CheckNonTypeTemplateParameterType(TInfo, D.getIdentifierLoc()); | |||
1047 | if (T.isNull()) { | |||
1048 | T = Context.IntTy; // Recover with an 'int' type. | |||
1049 | Invalid = true; | |||
1050 | } | |||
1051 | ||||
1052 | IdentifierInfo *ParamName = D.getIdentifier(); | |||
1053 | bool IsParameterPack = D.hasEllipsis(); | |||
1054 | NonTypeTemplateParmDecl *Param | |||
1055 | = NonTypeTemplateParmDecl::Create(Context, Context.getTranslationUnitDecl(), | |||
1056 | D.getLocStart(), | |||
1057 | D.getIdentifierLoc(), | |||
1058 | Depth, Position, ParamName, T, | |||
1059 | IsParameterPack, TInfo); | |||
1060 | Param->setAccess(AS_public); | |||
1061 | ||||
1062 | if (Invalid) | |||
1063 | Param->setInvalidDecl(); | |||
1064 | ||||
1065 | if (ParamName) { | |||
1066 | maybeDiagnoseTemplateParameterShadow(*this, S, D.getIdentifierLoc(), | |||
1067 | ParamName); | |||
1068 | ||||
1069 | // Add the template parameter into the current scope. | |||
1070 | S->AddDecl(Param); | |||
1071 | IdResolver.AddDecl(Param); | |||
1072 | } | |||
1073 | ||||
1074 | // C++0x [temp.param]p9: | |||
1075 | // A default template-argument may be specified for any kind of | |||
1076 | // template-parameter that is not a template parameter pack. | |||
1077 | if (Default && IsParameterPack) { | |||
1078 | Diag(EqualLoc, diag::err_template_param_pack_default_arg); | |||
1079 | Default = nullptr; | |||
1080 | } | |||
1081 | ||||
1082 | // Check the well-formedness of the default template argument, if provided. | |||
1083 | if (Default) { | |||
1084 | // Check for unexpanded parameter packs. | |||
1085 | if (DiagnoseUnexpandedParameterPack(Default, UPPC_DefaultArgument)) | |||
1086 | return Param; | |||
1087 | ||||
1088 | TemplateArgument Converted; | |||
1089 | ExprResult DefaultRes = | |||
1090 | CheckTemplateArgument(Param, Param->getType(), Default, Converted); | |||
1091 | if (DefaultRes.isInvalid()) { | |||
1092 | Param->setInvalidDecl(); | |||
1093 | return Param; | |||
1094 | } | |||
1095 | Default = DefaultRes.get(); | |||
1096 | ||||
1097 | Param->setDefaultArgument(Default); | |||
1098 | } | |||
1099 | ||||
1100 | return Param; | |||
1101 | } | |||
1102 | ||||
1103 | /// ActOnTemplateTemplateParameter - Called when a C++ template template | |||
1104 | /// parameter (e.g. T in template <template \<typename> class T> class array) | |||
1105 | /// has been parsed. S is the current scope. | |||
1106 | NamedDecl *Sema::ActOnTemplateTemplateParameter(Scope* S, | |||
1107 | SourceLocation TmpLoc, | |||
1108 | TemplateParameterList *Params, | |||
1109 | SourceLocation EllipsisLoc, | |||
1110 | IdentifierInfo *Name, | |||
1111 | SourceLocation NameLoc, | |||
1112 | unsigned Depth, | |||
1113 | unsigned Position, | |||
1114 | SourceLocation EqualLoc, | |||
1115 | ParsedTemplateArgument Default) { | |||
1116 | assert(S->isTemplateParamScope() &&(static_cast <bool> (S->isTemplateParamScope() && "Template template parameter not in template parameter scope!" ) ? void (0) : __assert_fail ("S->isTemplateParamScope() && \"Template template parameter not in template parameter scope!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 1117, __extension__ __PRETTY_FUNCTION__)) | |||
1117 | "Template template parameter not in template parameter scope!")(static_cast <bool> (S->isTemplateParamScope() && "Template template parameter not in template parameter scope!" ) ? void (0) : __assert_fail ("S->isTemplateParamScope() && \"Template template parameter not in template parameter scope!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 1117, __extension__ __PRETTY_FUNCTION__)); | |||
1118 | ||||
1119 | // Construct the parameter object. | |||
1120 | bool IsParameterPack = EllipsisLoc.isValid(); | |||
1121 | TemplateTemplateParmDecl *Param = | |||
1122 | TemplateTemplateParmDecl::Create(Context, Context.getTranslationUnitDecl(), | |||
1123 | NameLoc.isInvalid()? TmpLoc : NameLoc, | |||
1124 | Depth, Position, IsParameterPack, | |||
1125 | Name, Params); | |||
1126 | Param->setAccess(AS_public); | |||
1127 | ||||
1128 | // If the template template parameter has a name, then link the identifier | |||
1129 | // into the scope and lookup mechanisms. | |||
1130 | if (Name) { | |||
1131 | maybeDiagnoseTemplateParameterShadow(*this, S, NameLoc, Name); | |||
1132 | ||||
1133 | S->AddDecl(Param); | |||
1134 | IdResolver.AddDecl(Param); | |||
1135 | } | |||
1136 | ||||
1137 | if (Params->size() == 0) { | |||
1138 | Diag(Param->getLocation(), diag::err_template_template_parm_no_parms) | |||
1139 | << SourceRange(Params->getLAngleLoc(), Params->getRAngleLoc()); | |||
1140 | Param->setInvalidDecl(); | |||
1141 | } | |||
1142 | ||||
1143 | // C++0x [temp.param]p9: | |||
1144 | // A default template-argument may be specified for any kind of | |||
1145 | // template-parameter that is not a template parameter pack. | |||
1146 | if (IsParameterPack && !Default.isInvalid()) { | |||
1147 | Diag(EqualLoc, diag::err_template_param_pack_default_arg); | |||
1148 | Default = ParsedTemplateArgument(); | |||
1149 | } | |||
1150 | ||||
1151 | if (!Default.isInvalid()) { | |||
1152 | // Check only that we have a template template argument. We don't want to | |||
1153 | // try to check well-formedness now, because our template template parameter | |||
1154 | // might have dependent types in its template parameters, which we wouldn't | |||
1155 | // be able to match now. | |||
1156 | // | |||
1157 | // If none of the template template parameter's template arguments mention | |||
1158 | // other template parameters, we could actually perform more checking here. | |||
1159 | // However, it isn't worth doing. | |||
1160 | TemplateArgumentLoc DefaultArg = translateTemplateArgument(*this, Default); | |||
1161 | if (DefaultArg.getArgument().getAsTemplate().isNull()) { | |||
1162 | Diag(DefaultArg.getLocation(), diag::err_template_arg_not_valid_template) | |||
1163 | << DefaultArg.getSourceRange(); | |||
1164 | return Param; | |||
1165 | } | |||
1166 | ||||
1167 | // Check for unexpanded parameter packs. | |||
1168 | if (DiagnoseUnexpandedParameterPack(DefaultArg.getLocation(), | |||
1169 | DefaultArg.getArgument().getAsTemplate(), | |||
1170 | UPPC_DefaultArgument)) | |||
1171 | return Param; | |||
1172 | ||||
1173 | Param->setDefaultArgument(Context, DefaultArg); | |||
1174 | } | |||
1175 | ||||
1176 | return Param; | |||
1177 | } | |||
1178 | ||||
1179 | /// ActOnTemplateParameterList - Builds a TemplateParameterList, optionally | |||
1180 | /// constrained by RequiresClause, that contains the template parameters in | |||
1181 | /// Params. | |||
1182 | TemplateParameterList * | |||
1183 | Sema::ActOnTemplateParameterList(unsigned Depth, | |||
1184 | SourceLocation ExportLoc, | |||
1185 | SourceLocation TemplateLoc, | |||
1186 | SourceLocation LAngleLoc, | |||
1187 | ArrayRef<NamedDecl *> Params, | |||
1188 | SourceLocation RAngleLoc, | |||
1189 | Expr *RequiresClause) { | |||
1190 | if (ExportLoc.isValid()) | |||
1191 | Diag(ExportLoc, diag::warn_template_export_unsupported); | |||
1192 | ||||
1193 | return TemplateParameterList::Create( | |||
1194 | Context, TemplateLoc, LAngleLoc, | |||
1195 | llvm::makeArrayRef(Params.data(), Params.size()), | |||
1196 | RAngleLoc, RequiresClause); | |||
1197 | } | |||
1198 | ||||
1199 | static void SetNestedNameSpecifier(TagDecl *T, const CXXScopeSpec &SS) { | |||
1200 | if (SS.isSet()) | |||
1201 | T->setQualifierInfo(SS.getWithLocInContext(T->getASTContext())); | |||
1202 | } | |||
1203 | ||||
1204 | DeclResult | |||
1205 | Sema::CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, | |||
1206 | SourceLocation KWLoc, CXXScopeSpec &SS, | |||
1207 | IdentifierInfo *Name, SourceLocation NameLoc, | |||
1208 | AttributeList *Attr, | |||
1209 | TemplateParameterList *TemplateParams, | |||
1210 | AccessSpecifier AS, SourceLocation ModulePrivateLoc, | |||
1211 | SourceLocation FriendLoc, | |||
1212 | unsigned NumOuterTemplateParamLists, | |||
1213 | TemplateParameterList** OuterTemplateParamLists, | |||
1214 | SkipBodyInfo *SkipBody) { | |||
1215 | assert(TemplateParams && TemplateParams->size() > 0 &&(static_cast <bool> (TemplateParams && TemplateParams ->size() > 0 && "No template parameters") ? void (0) : __assert_fail ("TemplateParams && TemplateParams->size() > 0 && \"No template parameters\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 1216, __extension__ __PRETTY_FUNCTION__)) | |||
1216 | "No template parameters")(static_cast <bool> (TemplateParams && TemplateParams ->size() > 0 && "No template parameters") ? void (0) : __assert_fail ("TemplateParams && TemplateParams->size() > 0 && \"No template parameters\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 1216, __extension__ __PRETTY_FUNCTION__)); | |||
1217 | assert(TUK != TUK_Reference && "Can only declare or define class templates")(static_cast <bool> (TUK != TUK_Reference && "Can only declare or define class templates" ) ? void (0) : __assert_fail ("TUK != TUK_Reference && \"Can only declare or define class templates\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 1217, __extension__ __PRETTY_FUNCTION__)); | |||
1218 | bool Invalid = false; | |||
1219 | ||||
1220 | // Check that we can declare a template here. | |||
1221 | if (CheckTemplateDeclScope(S, TemplateParams)) | |||
1222 | return true; | |||
1223 | ||||
1224 | TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec); | |||
1225 | assert(Kind != TTK_Enum && "can't build template of enumerated type")(static_cast <bool> (Kind != TTK_Enum && "can't build template of enumerated type" ) ? void (0) : __assert_fail ("Kind != TTK_Enum && \"can't build template of enumerated type\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 1225, __extension__ __PRETTY_FUNCTION__)); | |||
1226 | ||||
1227 | // There is no such thing as an unnamed class template. | |||
1228 | if (!Name) { | |||
1229 | Diag(KWLoc, diag::err_template_unnamed_class); | |||
1230 | return true; | |||
1231 | } | |||
1232 | ||||
1233 | // Find any previous declaration with this name. For a friend with no | |||
1234 | // scope explicitly specified, we only look for tag declarations (per | |||
1235 | // C++11 [basic.lookup.elab]p2). | |||
1236 | DeclContext *SemanticContext; | |||
1237 | LookupResult Previous(*this, Name, NameLoc, | |||
1238 | (SS.isEmpty() && TUK == TUK_Friend) | |||
1239 | ? LookupTagName : LookupOrdinaryName, | |||
1240 | forRedeclarationInCurContext()); | |||
1241 | if (SS.isNotEmpty() && !SS.isInvalid()) { | |||
1242 | SemanticContext = computeDeclContext(SS, true); | |||
1243 | if (!SemanticContext) { | |||
1244 | // FIXME: Horrible, horrible hack! We can't currently represent this | |||
1245 | // in the AST, and historically we have just ignored such friend | |||
1246 | // class templates, so don't complain here. | |||
1247 | Diag(NameLoc, TUK == TUK_Friend | |||
1248 | ? diag::warn_template_qualified_friend_ignored | |||
1249 | : diag::err_template_qualified_declarator_no_match) | |||
1250 | << SS.getScopeRep() << SS.getRange(); | |||
1251 | return TUK != TUK_Friend; | |||
1252 | } | |||
1253 | ||||
1254 | if (RequireCompleteDeclContext(SS, SemanticContext)) | |||
1255 | return true; | |||
1256 | ||||
1257 | // If we're adding a template to a dependent context, we may need to | |||
1258 | // rebuilding some of the types used within the template parameter list, | |||
1259 | // now that we know what the current instantiation is. | |||
1260 | if (SemanticContext->isDependentContext()) { | |||
1261 | ContextRAII SavedContext(*this, SemanticContext); | |||
1262 | if (RebuildTemplateParamsInCurrentInstantiation(TemplateParams)) | |||
1263 | Invalid = true; | |||
1264 | } else if (TUK != TUK_Friend && TUK != TUK_Reference) | |||
1265 | diagnoseQualifiedDeclaration(SS, SemanticContext, Name, NameLoc, false); | |||
1266 | ||||
1267 | LookupQualifiedName(Previous, SemanticContext); | |||
1268 | } else { | |||
1269 | SemanticContext = CurContext; | |||
1270 | ||||
1271 | // C++14 [class.mem]p14: | |||
1272 | // If T is the name of a class, then each of the following shall have a | |||
1273 | // name different from T: | |||
1274 | // -- every member template of class T | |||
1275 | if (TUK != TUK_Friend && | |||
1276 | DiagnoseClassNameShadow(SemanticContext, | |||
1277 | DeclarationNameInfo(Name, NameLoc))) | |||
1278 | return true; | |||
1279 | ||||
1280 | LookupName(Previous, S); | |||
1281 | } | |||
1282 | ||||
1283 | if (Previous.isAmbiguous()) | |||
1284 | return true; | |||
1285 | ||||
1286 | NamedDecl *PrevDecl = nullptr; | |||
1287 | if (Previous.begin() != Previous.end()) | |||
1288 | PrevDecl = (*Previous.begin())->getUnderlyingDecl(); | |||
1289 | ||||
1290 | if (PrevDecl && PrevDecl->isTemplateParameter()) { | |||
1291 | // Maybe we will complain about the shadowed template parameter. | |||
1292 | DiagnoseTemplateParameterShadow(NameLoc, PrevDecl); | |||
1293 | // Just pretend that we didn't see the previous declaration. | |||
1294 | PrevDecl = nullptr; | |||
1295 | } | |||
1296 | ||||
1297 | // If there is a previous declaration with the same name, check | |||
1298 | // whether this is a valid redeclaration. | |||
1299 | ClassTemplateDecl *PrevClassTemplate = | |||
1300 | dyn_cast_or_null<ClassTemplateDecl>(PrevDecl); | |||
1301 | ||||
1302 | // We may have found the injected-class-name of a class template, | |||
1303 | // class template partial specialization, or class template specialization. | |||
1304 | // In these cases, grab the template that is being defined or specialized. | |||
1305 | if (!PrevClassTemplate && PrevDecl && isa<CXXRecordDecl>(PrevDecl) && | |||
1306 | cast<CXXRecordDecl>(PrevDecl)->isInjectedClassName()) { | |||
1307 | PrevDecl = cast<CXXRecordDecl>(PrevDecl->getDeclContext()); | |||
1308 | PrevClassTemplate | |||
1309 | = cast<CXXRecordDecl>(PrevDecl)->getDescribedClassTemplate(); | |||
1310 | if (!PrevClassTemplate && isa<ClassTemplateSpecializationDecl>(PrevDecl)) { | |||
1311 | PrevClassTemplate | |||
1312 | = cast<ClassTemplateSpecializationDecl>(PrevDecl) | |||
1313 | ->getSpecializedTemplate(); | |||
1314 | } | |||
1315 | } | |||
1316 | ||||
1317 | if (TUK == TUK_Friend) { | |||
1318 | // C++ [namespace.memdef]p3: | |||
1319 | // [...] When looking for a prior declaration of a class or a function | |||
1320 | // declared as a friend, and when the name of the friend class or | |||
1321 | // function is neither a qualified name nor a template-id, scopes outside | |||
1322 | // the innermost enclosing namespace scope are not considered. | |||
1323 | if (!SS.isSet()) { | |||
1324 | DeclContext *OutermostContext = CurContext; | |||
1325 | while (!OutermostContext->isFileContext()) | |||
1326 | OutermostContext = OutermostContext->getLookupParent(); | |||
1327 | ||||
1328 | if (PrevDecl && | |||
1329 | (OutermostContext->Equals(PrevDecl->getDeclContext()) || | |||
1330 | OutermostContext->Encloses(PrevDecl->getDeclContext()))) { | |||
1331 | SemanticContext = PrevDecl->getDeclContext(); | |||
1332 | } else { | |||
1333 | // Declarations in outer scopes don't matter. However, the outermost | |||
1334 | // context we computed is the semantic context for our new | |||
1335 | // declaration. | |||
1336 | PrevDecl = PrevClassTemplate = nullptr; | |||
1337 | SemanticContext = OutermostContext; | |||
1338 | ||||
1339 | // Check that the chosen semantic context doesn't already contain a | |||
1340 | // declaration of this name as a non-tag type. | |||
1341 | Previous.clear(LookupOrdinaryName); | |||
1342 | DeclContext *LookupContext = SemanticContext; | |||
1343 | while (LookupContext->isTransparentContext()) | |||
1344 | LookupContext = LookupContext->getLookupParent(); | |||
1345 | LookupQualifiedName(Previous, LookupContext); | |||
1346 | ||||
1347 | if (Previous.isAmbiguous()) | |||
1348 | return true; | |||
1349 | ||||
1350 | if (Previous.begin() != Previous.end()) | |||
1351 | PrevDecl = (*Previous.begin())->getUnderlyingDecl(); | |||
1352 | } | |||
1353 | } | |||
1354 | } else if (PrevDecl && | |||
1355 | !isDeclInScope(Previous.getRepresentativeDecl(), SemanticContext, | |||
1356 | S, SS.isValid())) | |||
1357 | PrevDecl = PrevClassTemplate = nullptr; | |||
1358 | ||||
1359 | if (auto *Shadow = dyn_cast_or_null<UsingShadowDecl>( | |||
1360 | PrevDecl ? Previous.getRepresentativeDecl() : nullptr)) { | |||
1361 | if (SS.isEmpty() && | |||
1362 | !(PrevClassTemplate && | |||
1363 | PrevClassTemplate->getDeclContext()->getRedeclContext()->Equals( | |||
1364 | SemanticContext->getRedeclContext()))) { | |||
1365 | Diag(KWLoc, diag::err_using_decl_conflict_reverse); | |||
1366 | Diag(Shadow->getTargetDecl()->getLocation(), | |||
1367 | diag::note_using_decl_target); | |||
1368 | Diag(Shadow->getUsingDecl()->getLocation(), diag::note_using_decl) << 0; | |||
1369 | // Recover by ignoring the old declaration. | |||
1370 | PrevDecl = PrevClassTemplate = nullptr; | |||
1371 | } | |||
1372 | } | |||
1373 | ||||
1374 | // TODO Memory management; associated constraints are not always stored. | |||
1375 | Expr *const CurAC = formAssociatedConstraints(TemplateParams, nullptr); | |||
1376 | ||||
1377 | if (PrevClassTemplate) { | |||
1378 | // Ensure that the template parameter lists are compatible. Skip this check | |||
1379 | // for a friend in a dependent context: the template parameter list itself | |||
1380 | // could be dependent. | |||
1381 | if (!(TUK == TUK_Friend && CurContext->isDependentContext()) && | |||
1382 | !TemplateParameterListsAreEqual(TemplateParams, | |||
1383 | PrevClassTemplate->getTemplateParameters(), | |||
1384 | /*Complain=*/true, | |||
1385 | TPL_TemplateMatch)) | |||
1386 | return true; | |||
1387 | ||||
1388 | // Check for matching associated constraints on redeclarations. | |||
1389 | const Expr *const PrevAC = PrevClassTemplate->getAssociatedConstraints(); | |||
1390 | const bool RedeclACMismatch = [&] { | |||
1391 | if (!(CurAC || PrevAC)) | |||
1392 | return false; // Nothing to check; no mismatch. | |||
1393 | if (CurAC && PrevAC) { | |||
1394 | llvm::FoldingSetNodeID CurACInfo, PrevACInfo; | |||
1395 | CurAC->Profile(CurACInfo, Context, /*Canonical=*/true); | |||
1396 | PrevAC->Profile(PrevACInfo, Context, /*Canonical=*/true); | |||
1397 | if (CurACInfo == PrevACInfo) | |||
1398 | return false; // All good; no mismatch. | |||
1399 | } | |||
1400 | return true; | |||
1401 | }(); | |||
1402 | ||||
1403 | if (RedeclACMismatch) { | |||
1404 | Diag(CurAC ? CurAC->getLocStart() : NameLoc, | |||
1405 | diag::err_template_different_associated_constraints); | |||
1406 | Diag(PrevAC ? PrevAC->getLocStart() : PrevClassTemplate->getLocation(), | |||
1407 | diag::note_template_prev_declaration) << /*declaration*/0; | |||
1408 | return true; | |||
1409 | } | |||
1410 | ||||
1411 | // C++ [temp.class]p4: | |||
1412 | // In a redeclaration, partial specialization, explicit | |||
1413 | // specialization or explicit instantiation of a class template, | |||
1414 | // the class-key shall agree in kind with the original class | |||
1415 | // template declaration (7.1.5.3). | |||
1416 | RecordDecl *PrevRecordDecl = PrevClassTemplate->getTemplatedDecl(); | |||
1417 | if (!isAcceptableTagRedeclaration(PrevRecordDecl, Kind, | |||
1418 | TUK == TUK_Definition, KWLoc, Name)) { | |||
1419 | Diag(KWLoc, diag::err_use_with_wrong_tag) | |||
1420 | << Name | |||
1421 | << FixItHint::CreateReplacement(KWLoc, PrevRecordDecl->getKindName()); | |||
1422 | Diag(PrevRecordDecl->getLocation(), diag::note_previous_use); | |||
1423 | Kind = PrevRecordDecl->getTagKind(); | |||
1424 | } | |||
1425 | ||||
1426 | // Check for redefinition of this class template. | |||
1427 | if (TUK == TUK_Definition) { | |||
1428 | if (TagDecl *Def = PrevRecordDecl->getDefinition()) { | |||
1429 | // If we have a prior definition that is not visible, treat this as | |||
1430 | // simply making that previous definition visible. | |||
1431 | NamedDecl *Hidden = nullptr; | |||
1432 | if (SkipBody && !hasVisibleDefinition(Def, &Hidden)) { | |||
1433 | SkipBody->ShouldSkip = true; | |||
1434 | auto *Tmpl = cast<CXXRecordDecl>(Hidden)->getDescribedClassTemplate(); | |||
1435 | assert(Tmpl && "original definition of a class template is not a "(static_cast <bool> (Tmpl && "original definition of a class template is not a " "class template?") ? void (0) : __assert_fail ("Tmpl && \"original definition of a class template is not a \" \"class template?\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 1436, __extension__ __PRETTY_FUNCTION__)) | |||
1436 | "class template?")(static_cast <bool> (Tmpl && "original definition of a class template is not a " "class template?") ? void (0) : __assert_fail ("Tmpl && \"original definition of a class template is not a \" \"class template?\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 1436, __extension__ __PRETTY_FUNCTION__)); | |||
1437 | makeMergedDefinitionVisible(Hidden); | |||
1438 | makeMergedDefinitionVisible(Tmpl); | |||
1439 | return Def; | |||
1440 | } | |||
1441 | ||||
1442 | Diag(NameLoc, diag::err_redefinition) << Name; | |||
1443 | Diag(Def->getLocation(), diag::note_previous_definition); | |||
1444 | // FIXME: Would it make sense to try to "forget" the previous | |||
1445 | // definition, as part of error recovery? | |||
1446 | return true; | |||
1447 | } | |||
1448 | } | |||
1449 | } else if (PrevDecl) { | |||
1450 | // C++ [temp]p5: | |||
1451 | // A class template shall not have the same name as any other | |||
1452 | // template, class, function, object, enumeration, enumerator, | |||
1453 | // namespace, or type in the same scope (3.3), except as specified | |||
1454 | // in (14.5.4). | |||
1455 | Diag(NameLoc, diag::err_redefinition_different_kind) << Name; | |||
1456 | Diag(PrevDecl->getLocation(), diag::note_previous_definition); | |||
1457 | return true; | |||
1458 | } | |||
1459 | ||||
1460 | // Check the template parameter list of this declaration, possibly | |||
1461 | // merging in the template parameter list from the previous class | |||
1462 | // template declaration. Skip this check for a friend in a dependent | |||
1463 | // context, because the template parameter list might be dependent. | |||
1464 | if (!(TUK == TUK_Friend && CurContext->isDependentContext()) && | |||
1465 | CheckTemplateParameterList( | |||
1466 | TemplateParams, | |||
1467 | PrevClassTemplate ? PrevClassTemplate->getTemplateParameters() | |||
1468 | : nullptr, | |||
1469 | (SS.isSet() && SemanticContext && SemanticContext->isRecord() && | |||
1470 | SemanticContext->isDependentContext()) | |||
1471 | ? TPC_ClassTemplateMember | |||
1472 | : TUK == TUK_Friend ? TPC_FriendClassTemplate | |||
1473 | : TPC_ClassTemplate)) | |||
1474 | Invalid = true; | |||
1475 | ||||
1476 | if (SS.isSet()) { | |||
1477 | // If the name of the template was qualified, we must be defining the | |||
1478 | // template out-of-line. | |||
1479 | if (!SS.isInvalid() && !Invalid && !PrevClassTemplate) { | |||
1480 | Diag(NameLoc, TUK == TUK_Friend ? diag::err_friend_decl_does_not_match | |||
1481 | : diag::err_member_decl_does_not_match) | |||
1482 | << Name << SemanticContext << /*IsDefinition*/true << SS.getRange(); | |||
1483 | Invalid = true; | |||
1484 | } | |||
1485 | } | |||
1486 | ||||
1487 | // If this is a templated friend in a dependent context we should not put it | |||
1488 | // on the redecl chain. In some cases, the templated friend can be the most | |||
1489 | // recent declaration tricking the template instantiator to make substitutions | |||
1490 | // there. | |||
1491 | // FIXME: Figure out how to combine with shouldLinkDependentDeclWithPrevious | |||
1492 | bool ShouldAddRedecl | |||
1493 | = !(TUK == TUK_Friend && CurContext->isDependentContext()); | |||
1494 | ||||
1495 | CXXRecordDecl *NewClass = | |||
1496 | CXXRecordDecl::Create(Context, Kind, SemanticContext, KWLoc, NameLoc, Name, | |||
1497 | PrevClassTemplate && ShouldAddRedecl ? | |||
1498 | PrevClassTemplate->getTemplatedDecl() : nullptr, | |||
1499 | /*DelayTypeCreation=*/true); | |||
1500 | SetNestedNameSpecifier(NewClass, SS); | |||
1501 | if (NumOuterTemplateParamLists > 0) | |||
1502 | NewClass->setTemplateParameterListsInfo( | |||
1503 | Context, llvm::makeArrayRef(OuterTemplateParamLists, | |||
1504 | NumOuterTemplateParamLists)); | |||
1505 | ||||
1506 | // Add alignment attributes if necessary; these attributes are checked when | |||
1507 | // the ASTContext lays out the structure. | |||
1508 | if (TUK == TUK_Definition) { | |||
1509 | AddAlignmentAttributesForRecord(NewClass); | |||
1510 | AddMsStructLayoutForRecord(NewClass); | |||
1511 | } | |||
1512 | ||||
1513 | // Attach the associated constraints when the declaration will not be part of | |||
1514 | // a decl chain. | |||
1515 | Expr *const ACtoAttach = | |||
1516 | PrevClassTemplate && ShouldAddRedecl ? nullptr : CurAC; | |||
1517 | ||||
1518 | ClassTemplateDecl *NewTemplate | |||
1519 | = ClassTemplateDecl::Create(Context, SemanticContext, NameLoc, | |||
1520 | DeclarationName(Name), TemplateParams, | |||
1521 | NewClass, ACtoAttach); | |||
1522 | ||||
1523 | if (ShouldAddRedecl) | |||
1524 | NewTemplate->setPreviousDecl(PrevClassTemplate); | |||
1525 | ||||
1526 | NewClass->setDescribedClassTemplate(NewTemplate); | |||
1527 | ||||
1528 | if (ModulePrivateLoc.isValid()) | |||
1529 | NewTemplate->setModulePrivate(); | |||
1530 | ||||
1531 | // Build the type for the class template declaration now. | |||
1532 | QualType T = NewTemplate->getInjectedClassNameSpecialization(); | |||
1533 | T = Context.getInjectedClassNameType(NewClass, T); | |||
1534 | assert(T->isDependentType() && "Class template type is not dependent?")(static_cast <bool> (T->isDependentType() && "Class template type is not dependent?") ? void (0) : __assert_fail ("T->isDependentType() && \"Class template type is not dependent?\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 1534, __extension__ __PRETTY_FUNCTION__)); | |||
1535 | (void)T; | |||
1536 | ||||
1537 | // If we are providing an explicit specialization of a member that is a | |||
1538 | // class template, make a note of that. | |||
1539 | if (PrevClassTemplate && | |||
1540 | PrevClassTemplate->getInstantiatedFromMemberTemplate()) | |||
1541 | PrevClassTemplate->setMemberSpecialization(); | |||
1542 | ||||
1543 | // Set the access specifier. | |||
1544 | if (!Invalid && TUK != TUK_Friend && NewTemplate->getDeclContext()->isRecord()) | |||
1545 | SetMemberAccessSpecifier(NewTemplate, PrevClassTemplate, AS); | |||
1546 | ||||
1547 | // Set the lexical context of these templates | |||
1548 | NewClass->setLexicalDeclContext(CurContext); | |||
1549 | NewTemplate->setLexicalDeclContext(CurContext); | |||
1550 | ||||
1551 | if (TUK == TUK_Definition) | |||
1552 | NewClass->startDefinition(); | |||
1553 | ||||
1554 | if (Attr) | |||
1555 | ProcessDeclAttributeList(S, NewClass, Attr); | |||
1556 | ||||
1557 | if (PrevClassTemplate) | |||
1558 | mergeDeclAttributes(NewClass, PrevClassTemplate->getTemplatedDecl()); | |||
1559 | ||||
1560 | AddPushedVisibilityAttribute(NewClass); | |||
1561 | ||||
1562 | if (TUK != TUK_Friend) { | |||
1563 | // Per C++ [basic.scope.temp]p2, skip the template parameter scopes. | |||
1564 | Scope *Outer = S; | |||
1565 | while ((Outer->getFlags() & Scope::TemplateParamScope) != 0) | |||
1566 | Outer = Outer->getParent(); | |||
1567 | PushOnScopeChains(NewTemplate, Outer); | |||
1568 | } else { | |||
1569 | if (PrevClassTemplate && PrevClassTemplate->getAccess() != AS_none) { | |||
1570 | NewTemplate->setAccess(PrevClassTemplate->getAccess()); | |||
1571 | NewClass->setAccess(PrevClassTemplate->getAccess()); | |||
1572 | } | |||
1573 | ||||
1574 | NewTemplate->setObjectOfFriendDecl(); | |||
1575 | ||||
1576 | // Friend templates are visible in fairly strange ways. | |||
1577 | if (!CurContext->isDependentContext()) { | |||
1578 | DeclContext *DC = SemanticContext->getRedeclContext(); | |||
1579 | DC->makeDeclVisibleInContext(NewTemplate); | |||
1580 | if (Scope *EnclosingScope = getScopeForDeclContext(S, DC)) | |||
1581 | PushOnScopeChains(NewTemplate, EnclosingScope, | |||
1582 | /* AddToContext = */ false); | |||
1583 | } | |||
1584 | ||||
1585 | FriendDecl *Friend = FriendDecl::Create( | |||
1586 | Context, CurContext, NewClass->getLocation(), NewTemplate, FriendLoc); | |||
1587 | Friend->setAccess(AS_public); | |||
1588 | CurContext->addDecl(Friend); | |||
1589 | } | |||
1590 | ||||
1591 | if (PrevClassTemplate) | |||
1592 | CheckRedeclarationModuleOwnership(NewTemplate, PrevClassTemplate); | |||
1593 | ||||
1594 | if (Invalid) { | |||
1595 | NewTemplate->setInvalidDecl(); | |||
1596 | NewClass->setInvalidDecl(); | |||
1597 | } | |||
1598 | ||||
1599 | ActOnDocumentableDecl(NewTemplate); | |||
1600 | ||||
1601 | return NewTemplate; | |||
1602 | } | |||
1603 | ||||
1604 | namespace { | |||
1605 | /// Transform to convert portions of a constructor declaration into the | |||
1606 | /// corresponding deduction guide, per C++1z [over.match.class.deduct]p1. | |||
1607 | struct ConvertConstructorToDeductionGuideTransform { | |||
1608 | ConvertConstructorToDeductionGuideTransform(Sema &S, | |||
1609 | ClassTemplateDecl *Template) | |||
1610 | : SemaRef(S), Template(Template) {} | |||
1611 | ||||
1612 | Sema &SemaRef; | |||
1613 | ClassTemplateDecl *Template; | |||
1614 | ||||
1615 | DeclContext *DC = Template->getDeclContext(); | |||
1616 | CXXRecordDecl *Primary = Template->getTemplatedDecl(); | |||
1617 | DeclarationName DeductionGuideName = | |||
1618 | SemaRef.Context.DeclarationNames.getCXXDeductionGuideName(Template); | |||
1619 | ||||
1620 | QualType DeducedType = SemaRef.Context.getTypeDeclType(Primary); | |||
1621 | ||||
1622 | // Index adjustment to apply to convert depth-1 template parameters into | |||
1623 | // depth-0 template parameters. | |||
1624 | unsigned Depth1IndexAdjustment = Template->getTemplateParameters()->size(); | |||
1625 | ||||
1626 | /// Transform a constructor declaration into a deduction guide. | |||
1627 | NamedDecl *transformConstructor(FunctionTemplateDecl *FTD, | |||
1628 | CXXConstructorDecl *CD) { | |||
1629 | SmallVector<TemplateArgument, 16> SubstArgs; | |||
1630 | ||||
1631 | LocalInstantiationScope Scope(SemaRef); | |||
1632 | ||||
1633 | // C++ [over.match.class.deduct]p1: | |||
1634 | // -- For each constructor of the class template designated by the | |||
1635 | // template-name, a function template with the following properties: | |||
1636 | ||||
1637 | // -- The template parameters are the template parameters of the class | |||
1638 | // template followed by the template parameters (including default | |||
1639 | // template arguments) of the constructor, if any. | |||
1640 | TemplateParameterList *TemplateParams = Template->getTemplateParameters(); | |||
1641 | if (FTD) { | |||
1642 | TemplateParameterList *InnerParams = FTD->getTemplateParameters(); | |||
1643 | SmallVector<NamedDecl *, 16> AllParams; | |||
1644 | AllParams.reserve(TemplateParams->size() + InnerParams->size()); | |||
1645 | AllParams.insert(AllParams.begin(), | |||
1646 | TemplateParams->begin(), TemplateParams->end()); | |||
1647 | SubstArgs.reserve(InnerParams->size()); | |||
1648 | ||||
1649 | // Later template parameters could refer to earlier ones, so build up | |||
1650 | // a list of substituted template arguments as we go. | |||
1651 | for (NamedDecl *Param : *InnerParams) { | |||
1652 | MultiLevelTemplateArgumentList Args; | |||
1653 | Args.addOuterTemplateArguments(SubstArgs); | |||
1654 | Args.addOuterRetainedLevel(); | |||
1655 | NamedDecl *NewParam = transformTemplateParameter(Param, Args); | |||
1656 | if (!NewParam) | |||
1657 | return nullptr; | |||
1658 | AllParams.push_back(NewParam); | |||
1659 | SubstArgs.push_back(SemaRef.Context.getCanonicalTemplateArgument( | |||
1660 | SemaRef.Context.getInjectedTemplateArg(NewParam))); | |||
1661 | } | |||
1662 | TemplateParams = TemplateParameterList::Create( | |||
1663 | SemaRef.Context, InnerParams->getTemplateLoc(), | |||
1664 | InnerParams->getLAngleLoc(), AllParams, InnerParams->getRAngleLoc(), | |||
1665 | /*FIXME: RequiresClause*/ nullptr); | |||
1666 | } | |||
1667 | ||||
1668 | // If we built a new template-parameter-list, track that we need to | |||
1669 | // substitute references to the old parameters into references to the | |||
1670 | // new ones. | |||
1671 | MultiLevelTemplateArgumentList Args; | |||
1672 | if (FTD) { | |||
1673 | Args.addOuterTemplateArguments(SubstArgs); | |||
1674 | Args.addOuterRetainedLevel(); | |||
1675 | } | |||
1676 | ||||
1677 | FunctionProtoTypeLoc FPTL = CD->getTypeSourceInfo()->getTypeLoc() | |||
1678 | .getAsAdjusted<FunctionProtoTypeLoc>(); | |||
1679 | assert(FPTL && "no prototype for constructor declaration")(static_cast <bool> (FPTL && "no prototype for constructor declaration" ) ? void (0) : __assert_fail ("FPTL && \"no prototype for constructor declaration\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 1679, __extension__ __PRETTY_FUNCTION__)); | |||
1680 | ||||
1681 | // Transform the type of the function, adjusting the return type and | |||
1682 | // replacing references to the old parameters with references to the | |||
1683 | // new ones. | |||
1684 | TypeLocBuilder TLB; | |||
1685 | SmallVector<ParmVarDecl*, 8> Params; | |||
1686 | QualType NewType = transformFunctionProtoType(TLB, FPTL, Params, Args); | |||
1687 | if (NewType.isNull()) | |||
1688 | return nullptr; | |||
1689 | TypeSourceInfo *NewTInfo = TLB.getTypeSourceInfo(SemaRef.Context, NewType); | |||
1690 | ||||
1691 | return buildDeductionGuide(TemplateParams, CD->isExplicit(), NewTInfo, | |||
1692 | CD->getLocStart(), CD->getLocation(), | |||
1693 | CD->getLocEnd()); | |||
1694 | } | |||
1695 | ||||
1696 | /// Build a deduction guide with the specified parameter types. | |||
1697 | NamedDecl *buildSimpleDeductionGuide(MutableArrayRef<QualType> ParamTypes) { | |||
1698 | SourceLocation Loc = Template->getLocation(); | |||
1699 | ||||
1700 | // Build the requested type. | |||
1701 | FunctionProtoType::ExtProtoInfo EPI; | |||
1702 | EPI.HasTrailingReturn = true; | |||
1703 | QualType Result = SemaRef.BuildFunctionType(DeducedType, ParamTypes, Loc, | |||
1704 | DeductionGuideName, EPI); | |||
1705 | TypeSourceInfo *TSI = SemaRef.Context.getTrivialTypeSourceInfo(Result, Loc); | |||
1706 | ||||
1707 | FunctionProtoTypeLoc FPTL = | |||
1708 | TSI->getTypeLoc().castAs<FunctionProtoTypeLoc>(); | |||
1709 | ||||
1710 | // Build the parameters, needed during deduction / substitution. | |||
1711 | SmallVector<ParmVarDecl*, 4> Params; | |||
1712 | for (auto T : ParamTypes) { | |||
1713 | ParmVarDecl *NewParam = ParmVarDecl::Create( | |||
1714 | SemaRef.Context, DC, Loc, Loc, nullptr, T, | |||
1715 | SemaRef.Context.getTrivialTypeSourceInfo(T, Loc), SC_None, nullptr); | |||
1716 | NewParam->setScopeInfo(0, Params.size()); | |||
1717 | FPTL.setParam(Params.size(), NewParam); | |||
1718 | Params.push_back(NewParam); | |||
1719 | } | |||
1720 | ||||
1721 | return buildDeductionGuide(Template->getTemplateParameters(), false, TSI, | |||
1722 | Loc, Loc, Loc); | |||
1723 | } | |||
1724 | ||||
1725 | private: | |||
1726 | /// Transform a constructor template parameter into a deduction guide template | |||
1727 | /// parameter, rebuilding any internal references to earlier parameters and | |||
1728 | /// renumbering as we go. | |||
1729 | NamedDecl *transformTemplateParameter(NamedDecl *TemplateParam, | |||
1730 | MultiLevelTemplateArgumentList &Args) { | |||
1731 | if (auto *TTP = dyn_cast<TemplateTypeParmDecl>(TemplateParam)) { | |||
1732 | // TemplateTypeParmDecl's index cannot be changed after creation, so | |||
1733 | // substitute it directly. | |||
1734 | auto *NewTTP = TemplateTypeParmDecl::Create( | |||
1735 | SemaRef.Context, DC, TTP->getLocStart(), TTP->getLocation(), | |||
1736 | /*Depth*/0, Depth1IndexAdjustment + TTP->getIndex(), | |||
1737 | TTP->getIdentifier(), TTP->wasDeclaredWithTypename(), | |||
1738 | TTP->isParameterPack()); | |||
1739 | if (TTP->hasDefaultArgument()) { | |||
1740 | TypeSourceInfo *InstantiatedDefaultArg = | |||
1741 | SemaRef.SubstType(TTP->getDefaultArgumentInfo(), Args, | |||
1742 | TTP->getDefaultArgumentLoc(), TTP->getDeclName()); | |||
1743 | if (InstantiatedDefaultArg) | |||
1744 | NewTTP->setDefaultArgument(InstantiatedDefaultArg); | |||
1745 | } | |||
1746 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(TemplateParam, | |||
1747 | NewTTP); | |||
1748 | return NewTTP; | |||
1749 | } | |||
1750 | ||||
1751 | if (auto *TTP = dyn_cast<TemplateTemplateParmDecl>(TemplateParam)) | |||
1752 | return transformTemplateParameterImpl(TTP, Args); | |||
1753 | ||||
1754 | return transformTemplateParameterImpl( | |||
1755 | cast<NonTypeTemplateParmDecl>(TemplateParam), Args); | |||
1756 | } | |||
1757 | template<typename TemplateParmDecl> | |||
1758 | TemplateParmDecl * | |||
1759 | transformTemplateParameterImpl(TemplateParmDecl *OldParam, | |||
1760 | MultiLevelTemplateArgumentList &Args) { | |||
1761 | // Ask the template instantiator to do the heavy lifting for us, then adjust | |||
1762 | // the index of the parameter once it's done. | |||
1763 | auto *NewParam = | |||
1764 | cast_or_null<TemplateParmDecl>(SemaRef.SubstDecl(OldParam, DC, Args)); | |||
1765 | assert(NewParam->getDepth() == 0 && "unexpected template param depth")(static_cast <bool> (NewParam->getDepth() == 0 && "unexpected template param depth") ? void (0) : __assert_fail ("NewParam->getDepth() == 0 && \"unexpected template param depth\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 1765, __extension__ __PRETTY_FUNCTION__)); | |||
1766 | NewParam->setPosition(NewParam->getPosition() + Depth1IndexAdjustment); | |||
1767 | return NewParam; | |||
1768 | } | |||
1769 | ||||
1770 | QualType transformFunctionProtoType(TypeLocBuilder &TLB, | |||
1771 | FunctionProtoTypeLoc TL, | |||
1772 | SmallVectorImpl<ParmVarDecl*> &Params, | |||
1773 | MultiLevelTemplateArgumentList &Args) { | |||
1774 | SmallVector<QualType, 4> ParamTypes; | |||
1775 | const FunctionProtoType *T = TL.getTypePtr(); | |||
1776 | ||||
1777 | // -- The types of the function parameters are those of the constructor. | |||
1778 | for (auto *OldParam : TL.getParams()) { | |||
1779 | ParmVarDecl *NewParam = transformFunctionTypeParam(OldParam, Args); | |||
1780 | if (!NewParam) | |||
1781 | return QualType(); | |||
1782 | ParamTypes.push_back(NewParam->getType()); | |||
1783 | Params.push_back(NewParam); | |||
1784 | } | |||
1785 | ||||
1786 | // -- The return type is the class template specialization designated by | |||
1787 | // the template-name and template arguments corresponding to the | |||
1788 | // template parameters obtained from the class template. | |||
1789 | // | |||
1790 | // We use the injected-class-name type of the primary template instead. | |||
1791 | // This has the convenient property that it is different from any type that | |||
1792 | // the user can write in a deduction-guide (because they cannot enter the | |||
1793 | // context of the template), so implicit deduction guides can never collide | |||
1794 | // with explicit ones. | |||
1795 | QualType ReturnType = DeducedType; | |||
1796 | TLB.pushTypeSpec(ReturnType).setNameLoc(Primary->getLocation()); | |||
1797 | ||||
1798 | // Resolving a wording defect, we also inherit the variadicness of the | |||
1799 | // constructor. | |||
1800 | FunctionProtoType::ExtProtoInfo EPI; | |||
1801 | EPI.Variadic = T->isVariadic(); | |||
1802 | EPI.HasTrailingReturn = true; | |||
1803 | ||||
1804 | QualType Result = SemaRef.BuildFunctionType( | |||
1805 | ReturnType, ParamTypes, TL.getLocStart(), DeductionGuideName, EPI); | |||
1806 | if (Result.isNull()) | |||
1807 | return QualType(); | |||
1808 | ||||
1809 | FunctionProtoTypeLoc NewTL = TLB.push<FunctionProtoTypeLoc>(Result); | |||
1810 | NewTL.setLocalRangeBegin(TL.getLocalRangeBegin()); | |||
1811 | NewTL.setLParenLoc(TL.getLParenLoc()); | |||
1812 | NewTL.setRParenLoc(TL.getRParenLoc()); | |||
1813 | NewTL.setExceptionSpecRange(SourceRange()); | |||
1814 | NewTL.setLocalRangeEnd(TL.getLocalRangeEnd()); | |||
1815 | for (unsigned I = 0, E = NewTL.getNumParams(); I != E; ++I) | |||
1816 | NewTL.setParam(I, Params[I]); | |||
1817 | ||||
1818 | return Result; | |||
1819 | } | |||
1820 | ||||
1821 | ParmVarDecl * | |||
1822 | transformFunctionTypeParam(ParmVarDecl *OldParam, | |||
1823 | MultiLevelTemplateArgumentList &Args) { | |||
1824 | TypeSourceInfo *OldDI = OldParam->getTypeSourceInfo(); | |||
1825 | TypeSourceInfo *NewDI; | |||
1826 | if (!Args.getNumLevels()) | |||
1827 | NewDI = OldDI; | |||
1828 | else if (auto PackTL = OldDI->getTypeLoc().getAs<PackExpansionTypeLoc>()) { | |||
1829 | // Expand out the one and only element in each inner pack. | |||
1830 | Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, 0); | |||
1831 | NewDI = | |||
1832 | SemaRef.SubstType(PackTL.getPatternLoc(), Args, | |||
1833 | OldParam->getLocation(), OldParam->getDeclName()); | |||
1834 | if (!NewDI) return nullptr; | |||
1835 | NewDI = | |||
1836 | SemaRef.CheckPackExpansion(NewDI, PackTL.getEllipsisLoc(), | |||
1837 | PackTL.getTypePtr()->getNumExpansions()); | |||
1838 | } else | |||
1839 | NewDI = SemaRef.SubstType(OldDI, Args, OldParam->getLocation(), | |||
1840 | OldParam->getDeclName()); | |||
1841 | if (!NewDI) | |||
1842 | return nullptr; | |||
1843 | ||||
1844 | // Canonicalize the type. This (for instance) replaces references to | |||
1845 | // typedef members of the current instantiations with the definitions of | |||
1846 | // those typedefs, avoiding triggering instantiation of the deduced type | |||
1847 | // during deduction. | |||
1848 | // FIXME: It would be preferable to retain type sugar and source | |||
1849 | // information here (and handle this in substitution instead). | |||
1850 | NewDI = SemaRef.Context.getTrivialTypeSourceInfo( | |||
1851 | SemaRef.Context.getCanonicalType(NewDI->getType()), | |||
1852 | OldParam->getLocation()); | |||
1853 | ||||
1854 | // Resolving a wording defect, we also inherit default arguments from the | |||
1855 | // constructor. | |||
1856 | ExprResult NewDefArg; | |||
1857 | if (OldParam->hasDefaultArg()) { | |||
1858 | NewDefArg = Args.getNumLevels() | |||
1859 | ? SemaRef.SubstExpr(OldParam->getDefaultArg(), Args) | |||
1860 | : OldParam->getDefaultArg(); | |||
1861 | if (NewDefArg.isInvalid()) | |||
1862 | return nullptr; | |||
1863 | } | |||
1864 | ||||
1865 | ParmVarDecl *NewParam = ParmVarDecl::Create(SemaRef.Context, DC, | |||
1866 | OldParam->getInnerLocStart(), | |||
1867 | OldParam->getLocation(), | |||
1868 | OldParam->getIdentifier(), | |||
1869 | NewDI->getType(), | |||
1870 | NewDI, | |||
1871 | OldParam->getStorageClass(), | |||
1872 | NewDefArg.get()); | |||
1873 | NewParam->setScopeInfo(OldParam->getFunctionScopeDepth(), | |||
1874 | OldParam->getFunctionScopeIndex()); | |||
1875 | return NewParam; | |||
1876 | } | |||
1877 | ||||
1878 | NamedDecl *buildDeductionGuide(TemplateParameterList *TemplateParams, | |||
1879 | bool Explicit, TypeSourceInfo *TInfo, | |||
1880 | SourceLocation LocStart, SourceLocation Loc, | |||
1881 | SourceLocation LocEnd) { | |||
1882 | DeclarationNameInfo Name(DeductionGuideName, Loc); | |||
1883 | ArrayRef<ParmVarDecl *> Params = | |||
1884 | TInfo->getTypeLoc().castAs<FunctionProtoTypeLoc>().getParams(); | |||
1885 | ||||
1886 | // Build the implicit deduction guide template. | |||
1887 | auto *Guide = | |||
1888 | CXXDeductionGuideDecl::Create(SemaRef.Context, DC, LocStart, Explicit, | |||
1889 | Name, TInfo->getType(), TInfo, LocEnd); | |||
1890 | Guide->setImplicit(); | |||
1891 | Guide->setParams(Params); | |||
1892 | ||||
1893 | for (auto *Param : Params) | |||
1894 | Param->setDeclContext(Guide); | |||
1895 | ||||
1896 | auto *GuideTemplate = FunctionTemplateDecl::Create( | |||
1897 | SemaRef.Context, DC, Loc, DeductionGuideName, TemplateParams, Guide); | |||
1898 | GuideTemplate->setImplicit(); | |||
1899 | Guide->setDescribedFunctionTemplate(GuideTemplate); | |||
1900 | ||||
1901 | if (isa<CXXRecordDecl>(DC)) { | |||
1902 | Guide->setAccess(AS_public); | |||
1903 | GuideTemplate->setAccess(AS_public); | |||
1904 | } | |||
1905 | ||||
1906 | DC->addDecl(GuideTemplate); | |||
1907 | return GuideTemplate; | |||
1908 | } | |||
1909 | }; | |||
1910 | } | |||
1911 | ||||
1912 | void Sema::DeclareImplicitDeductionGuides(TemplateDecl *Template, | |||
1913 | SourceLocation Loc) { | |||
1914 | DeclContext *DC = Template->getDeclContext(); | |||
1915 | if (DC->isDependentContext()) | |||
1916 | return; | |||
1917 | ||||
1918 | ConvertConstructorToDeductionGuideTransform Transform( | |||
1919 | *this, cast<ClassTemplateDecl>(Template)); | |||
1920 | if (!isCompleteType(Loc, Transform.DeducedType)) | |||
1921 | return; | |||
1922 | ||||
1923 | // Check whether we've already declared deduction guides for this template. | |||
1924 | // FIXME: Consider storing a flag on the template to indicate this. | |||
1925 | auto Existing = DC->lookup(Transform.DeductionGuideName); | |||
1926 | for (auto *D : Existing) | |||
1927 | if (D->isImplicit()) | |||
1928 | return; | |||
1929 | ||||
1930 | // In case we were expanding a pack when we attempted to declare deduction | |||
1931 | // guides, turn off pack expansion for everything we're about to do. | |||
1932 | ArgumentPackSubstitutionIndexRAII SubstIndex(*this, -1); | |||
1933 | // Create a template instantiation record to track the "instantiation" of | |||
1934 | // constructors into deduction guides. | |||
1935 | // FIXME: Add a kind for this to give more meaningful diagnostics. But can | |||
1936 | // this substitution process actually fail? | |||
1937 | InstantiatingTemplate BuildingDeductionGuides(*this, Loc, Template); | |||
1938 | ||||
1939 | // Convert declared constructors into deduction guide templates. | |||
1940 | // FIXME: Skip constructors for which deduction must necessarily fail (those | |||
1941 | // for which some class template parameter without a default argument never | |||
1942 | // appears in a deduced context). | |||
1943 | bool AddedAny = false; | |||
1944 | for (NamedDecl *D : LookupConstructors(Transform.Primary)) { | |||
1945 | D = D->getUnderlyingDecl(); | |||
1946 | if (D->isInvalidDecl() || D->isImplicit()) | |||
1947 | continue; | |||
1948 | D = cast<NamedDecl>(D->getCanonicalDecl()); | |||
1949 | ||||
1950 | auto *FTD = dyn_cast<FunctionTemplateDecl>(D); | |||
1951 | auto *CD = | |||
1952 | dyn_cast_or_null<CXXConstructorDecl>(FTD ? FTD->getTemplatedDecl() : D); | |||
1953 | // Class-scope explicit specializations (MS extension) do not result in | |||
1954 | // deduction guides. | |||
1955 | if (!CD || (!FTD && CD->isFunctionTemplateSpecialization())) | |||
1956 | continue; | |||
1957 | ||||
1958 | Transform.transformConstructor(FTD, CD); | |||
1959 | AddedAny = true; | |||
1960 | } | |||
1961 | ||||
1962 | // C++17 [over.match.class.deduct] | |||
1963 | // -- If C is not defined or does not declare any constructors, an | |||
1964 | // additional function template derived as above from a hypothetical | |||
1965 | // constructor C(). | |||
1966 | if (!AddedAny) | |||
1967 | Transform.buildSimpleDeductionGuide(None); | |||
1968 | ||||
1969 | // -- An additional function template derived as above from a hypothetical | |||
1970 | // constructor C(C), called the copy deduction candidate. | |||
1971 | cast<CXXDeductionGuideDecl>( | |||
1972 | cast<FunctionTemplateDecl>( | |||
1973 | Transform.buildSimpleDeductionGuide(Transform.DeducedType)) | |||
1974 | ->getTemplatedDecl()) | |||
1975 | ->setIsCopyDeductionCandidate(); | |||
1976 | } | |||
1977 | ||||
1978 | /// \brief Diagnose the presence of a default template argument on a | |||
1979 | /// template parameter, which is ill-formed in certain contexts. | |||
1980 | /// | |||
1981 | /// \returns true if the default template argument should be dropped. | |||
1982 | static bool DiagnoseDefaultTemplateArgument(Sema &S, | |||
1983 | Sema::TemplateParamListContext TPC, | |||
1984 | SourceLocation ParamLoc, | |||
1985 | SourceRange DefArgRange) { | |||
1986 | switch (TPC) { | |||
1987 | case Sema::TPC_ClassTemplate: | |||
1988 | case Sema::TPC_VarTemplate: | |||
1989 | case Sema::TPC_TypeAliasTemplate: | |||
1990 | return false; | |||
1991 | ||||
1992 | case Sema::TPC_FunctionTemplate: | |||
1993 | case Sema::TPC_FriendFunctionTemplateDefinition: | |||
1994 | // C++ [temp.param]p9: | |||
1995 | // A default template-argument shall not be specified in a | |||
1996 | // function template declaration or a function template | |||
1997 | // definition [...] | |||
1998 | // If a friend function template declaration specifies a default | |||
1999 | // template-argument, that declaration shall be a definition and shall be | |||
2000 | // the only declaration of the function template in the translation unit. | |||
2001 | // (C++98/03 doesn't have this wording; see DR226). | |||
2002 | S.Diag(ParamLoc, S.getLangOpts().CPlusPlus11 ? | |||
2003 | diag::warn_cxx98_compat_template_parameter_default_in_function_template | |||
2004 | : diag::ext_template_parameter_default_in_function_template) | |||
2005 | << DefArgRange; | |||
2006 | return false; | |||
2007 | ||||
2008 | case Sema::TPC_ClassTemplateMember: | |||
2009 | // C++0x [temp.param]p9: | |||
2010 | // A default template-argument shall not be specified in the | |||
2011 | // template-parameter-lists of the definition of a member of a | |||
2012 | // class template that appears outside of the member's class. | |||
2013 | S.Diag(ParamLoc, diag::err_template_parameter_default_template_member) | |||
2014 | << DefArgRange; | |||
2015 | return true; | |||
2016 | ||||
2017 | case Sema::TPC_FriendClassTemplate: | |||
2018 | case Sema::TPC_FriendFunctionTemplate: | |||
2019 | // C++ [temp.param]p9: | |||
2020 | // A default template-argument shall not be specified in a | |||
2021 | // friend template declaration. | |||
2022 | S.Diag(ParamLoc, diag::err_template_parameter_default_friend_template) | |||
2023 | << DefArgRange; | |||
2024 | return true; | |||
2025 | ||||
2026 | // FIXME: C++0x [temp.param]p9 allows default template-arguments | |||
2027 | // for friend function templates if there is only a single | |||
2028 | // declaration (and it is a definition). Strange! | |||
2029 | } | |||
2030 | ||||
2031 | llvm_unreachable("Invalid TemplateParamListContext!")::llvm::llvm_unreachable_internal("Invalid TemplateParamListContext!" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 2031); | |||
2032 | } | |||
2033 | ||||
2034 | /// \brief Check for unexpanded parameter packs within the template parameters | |||
2035 | /// of a template template parameter, recursively. | |||
2036 | static bool DiagnoseUnexpandedParameterPacks(Sema &S, | |||
2037 | TemplateTemplateParmDecl *TTP) { | |||
2038 | // A template template parameter which is a parameter pack is also a pack | |||
2039 | // expansion. | |||
2040 | if (TTP->isParameterPack()) | |||
2041 | return false; | |||
2042 | ||||
2043 | TemplateParameterList *Params = TTP->getTemplateParameters(); | |||
2044 | for (unsigned I = 0, N = Params->size(); I != N; ++I) { | |||
2045 | NamedDecl *P = Params->getParam(I); | |||
2046 | if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(P)) { | |||
2047 | if (!NTTP->isParameterPack() && | |||
2048 | S.DiagnoseUnexpandedParameterPack(NTTP->getLocation(), | |||
2049 | NTTP->getTypeSourceInfo(), | |||
2050 | Sema::UPPC_NonTypeTemplateParameterType)) | |||
2051 | return true; | |||
2052 | ||||
2053 | continue; | |||
2054 | } | |||
2055 | ||||
2056 | if (TemplateTemplateParmDecl *InnerTTP | |||
2057 | = dyn_cast<TemplateTemplateParmDecl>(P)) | |||
2058 | if (DiagnoseUnexpandedParameterPacks(S, InnerTTP)) | |||
2059 | return true; | |||
2060 | } | |||
2061 | ||||
2062 | return false; | |||
2063 | } | |||
2064 | ||||
2065 | /// \brief Checks the validity of a template parameter list, possibly | |||
2066 | /// considering the template parameter list from a previous | |||
2067 | /// declaration. | |||
2068 | /// | |||
2069 | /// If an "old" template parameter list is provided, it must be | |||
2070 | /// equivalent (per TemplateParameterListsAreEqual) to the "new" | |||
2071 | /// template parameter list. | |||
2072 | /// | |||
2073 | /// \param NewParams Template parameter list for a new template | |||
2074 | /// declaration. This template parameter list will be updated with any | |||
2075 | /// default arguments that are carried through from the previous | |||
2076 | /// template parameter list. | |||
2077 | /// | |||
2078 | /// \param OldParams If provided, template parameter list from a | |||
2079 | /// previous declaration of the same template. Default template | |||
2080 | /// arguments will be merged from the old template parameter list to | |||
2081 | /// the new template parameter list. | |||
2082 | /// | |||
2083 | /// \param TPC Describes the context in which we are checking the given | |||
2084 | /// template parameter list. | |||
2085 | /// | |||
2086 | /// \returns true if an error occurred, false otherwise. | |||
2087 | bool Sema::CheckTemplateParameterList(TemplateParameterList *NewParams, | |||
2088 | TemplateParameterList *OldParams, | |||
2089 | TemplateParamListContext TPC) { | |||
2090 | bool Invalid = false; | |||
2091 | ||||
2092 | // C++ [temp.param]p10: | |||
2093 | // The set of default template-arguments available for use with a | |||
2094 | // template declaration or definition is obtained by merging the | |||
2095 | // default arguments from the definition (if in scope) and all | |||
2096 | // declarations in scope in the same way default function | |||
2097 | // arguments are (8.3.6). | |||
2098 | bool SawDefaultArgument = false; | |||
2099 | SourceLocation PreviousDefaultArgLoc; | |||
2100 | ||||
2101 | // Dummy initialization to avoid warnings. | |||
2102 | TemplateParameterList::iterator OldParam = NewParams->end(); | |||
2103 | if (OldParams) | |||
2104 | OldParam = OldParams->begin(); | |||
2105 | ||||
2106 | bool RemoveDefaultArguments = false; | |||
2107 | for (TemplateParameterList::iterator NewParam = NewParams->begin(), | |||
2108 | NewParamEnd = NewParams->end(); | |||
2109 | NewParam != NewParamEnd; ++NewParam) { | |||
2110 | // Variables used to diagnose redundant default arguments | |||
2111 | bool RedundantDefaultArg = false; | |||
2112 | SourceLocation OldDefaultLoc; | |||
2113 | SourceLocation NewDefaultLoc; | |||
2114 | ||||
2115 | // Variable used to diagnose missing default arguments | |||
2116 | bool MissingDefaultArg = false; | |||
2117 | ||||
2118 | // Variable used to diagnose non-final parameter packs | |||
2119 | bool SawParameterPack = false; | |||
2120 | ||||
2121 | if (TemplateTypeParmDecl *NewTypeParm | |||
2122 | = dyn_cast<TemplateTypeParmDecl>(*NewParam)) { | |||
2123 | // Check the presence of a default argument here. | |||
2124 | if (NewTypeParm->hasDefaultArgument() && | |||
2125 | DiagnoseDefaultTemplateArgument(*this, TPC, | |||
2126 | NewTypeParm->getLocation(), | |||
2127 | NewTypeParm->getDefaultArgumentInfo()->getTypeLoc() | |||
2128 | .getSourceRange())) | |||
2129 | NewTypeParm->removeDefaultArgument(); | |||
2130 | ||||
2131 | // Merge default arguments for template type parameters. | |||
2132 | TemplateTypeParmDecl *OldTypeParm | |||
2133 | = OldParams? cast<TemplateTypeParmDecl>(*OldParam) : nullptr; | |||
2134 | if (NewTypeParm->isParameterPack()) { | |||
2135 | assert(!NewTypeParm->hasDefaultArgument() &&(static_cast <bool> (!NewTypeParm->hasDefaultArgument () && "Parameter packs can't have a default argument!" ) ? void (0) : __assert_fail ("!NewTypeParm->hasDefaultArgument() && \"Parameter packs can't have a default argument!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 2136, __extension__ __PRETTY_FUNCTION__)) | |||
2136 | "Parameter packs can't have a default argument!")(static_cast <bool> (!NewTypeParm->hasDefaultArgument () && "Parameter packs can't have a default argument!" ) ? void (0) : __assert_fail ("!NewTypeParm->hasDefaultArgument() && \"Parameter packs can't have a default argument!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 2136, __extension__ __PRETTY_FUNCTION__)); | |||
2137 | SawParameterPack = true; | |||
2138 | } else if (OldTypeParm && hasVisibleDefaultArgument(OldTypeParm) && | |||
2139 | NewTypeParm->hasDefaultArgument()) { | |||
2140 | OldDefaultLoc = OldTypeParm->getDefaultArgumentLoc(); | |||
2141 | NewDefaultLoc = NewTypeParm->getDefaultArgumentLoc(); | |||
2142 | SawDefaultArgument = true; | |||
2143 | RedundantDefaultArg = true; | |||
2144 | PreviousDefaultArgLoc = NewDefaultLoc; | |||
2145 | } else if (OldTypeParm && OldTypeParm->hasDefaultArgument()) { | |||
2146 | // Merge the default argument from the old declaration to the | |||
2147 | // new declaration. | |||
2148 | NewTypeParm->setInheritedDefaultArgument(Context, OldTypeParm); | |||
2149 | PreviousDefaultArgLoc = OldTypeParm->getDefaultArgumentLoc(); | |||
2150 | } else if (NewTypeParm->hasDefaultArgument()) { | |||
2151 | SawDefaultArgument = true; | |||
2152 | PreviousDefaultArgLoc = NewTypeParm->getDefaultArgumentLoc(); | |||
2153 | } else if (SawDefaultArgument) | |||
2154 | MissingDefaultArg = true; | |||
2155 | } else if (NonTypeTemplateParmDecl *NewNonTypeParm | |||
2156 | = dyn_cast<NonTypeTemplateParmDecl>(*NewParam)) { | |||
2157 | // Check for unexpanded parameter packs. | |||
2158 | if (!NewNonTypeParm->isParameterPack() && | |||
2159 | DiagnoseUnexpandedParameterPack(NewNonTypeParm->getLocation(), | |||
2160 | NewNonTypeParm->getTypeSourceInfo(), | |||
2161 | UPPC_NonTypeTemplateParameterType)) { | |||
2162 | Invalid = true; | |||
2163 | continue; | |||
2164 | } | |||
2165 | ||||
2166 | // Check the presence of a default argument here. | |||
2167 | if (NewNonTypeParm->hasDefaultArgument() && | |||
2168 | DiagnoseDefaultTemplateArgument(*this, TPC, | |||
2169 | NewNonTypeParm->getLocation(), | |||
2170 | NewNonTypeParm->getDefaultArgument()->getSourceRange())) { | |||
2171 | NewNonTypeParm->removeDefaultArgument(); | |||
2172 | } | |||
2173 | ||||
2174 | // Merge default arguments for non-type template parameters | |||
2175 | NonTypeTemplateParmDecl *OldNonTypeParm | |||
2176 | = OldParams? cast<NonTypeTemplateParmDecl>(*OldParam) : nullptr; | |||
2177 | if (NewNonTypeParm->isParameterPack()) { | |||
2178 | assert(!NewNonTypeParm->hasDefaultArgument() &&(static_cast <bool> (!NewNonTypeParm->hasDefaultArgument () && "Parameter packs can't have a default argument!" ) ? void (0) : __assert_fail ("!NewNonTypeParm->hasDefaultArgument() && \"Parameter packs can't have a default argument!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 2179, __extension__ __PRETTY_FUNCTION__)) | |||
2179 | "Parameter packs can't have a default argument!")(static_cast <bool> (!NewNonTypeParm->hasDefaultArgument () && "Parameter packs can't have a default argument!" ) ? void (0) : __assert_fail ("!NewNonTypeParm->hasDefaultArgument() && \"Parameter packs can't have a default argument!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 2179, __extension__ __PRETTY_FUNCTION__)); | |||
2180 | if (!NewNonTypeParm->isPackExpansion()) | |||
2181 | SawParameterPack = true; | |||
2182 | } else if (OldNonTypeParm && hasVisibleDefaultArgument(OldNonTypeParm) && | |||
2183 | NewNonTypeParm->hasDefaultArgument()) { | |||
2184 | OldDefaultLoc = OldNonTypeParm->getDefaultArgumentLoc(); | |||
2185 | NewDefaultLoc = NewNonTypeParm->getDefaultArgumentLoc(); | |||
2186 | SawDefaultArgument = true; | |||
2187 | RedundantDefaultArg = true; | |||
2188 | PreviousDefaultArgLoc = NewDefaultLoc; | |||
2189 | } else if (OldNonTypeParm && OldNonTypeParm->hasDefaultArgument()) { | |||
2190 | // Merge the default argument from the old declaration to the | |||
2191 | // new declaration. | |||
2192 | NewNonTypeParm->setInheritedDefaultArgument(Context, OldNonTypeParm); | |||
2193 | PreviousDefaultArgLoc = OldNonTypeParm->getDefaultArgumentLoc(); | |||
2194 | } else if (NewNonTypeParm->hasDefaultArgument()) { | |||
2195 | SawDefaultArgument = true; | |||
2196 | PreviousDefaultArgLoc = NewNonTypeParm->getDefaultArgumentLoc(); | |||
2197 | } else if (SawDefaultArgument) | |||
2198 | MissingDefaultArg = true; | |||
2199 | } else { | |||
2200 | TemplateTemplateParmDecl *NewTemplateParm | |||
2201 | = cast<TemplateTemplateParmDecl>(*NewParam); | |||
2202 | ||||
2203 | // Check for unexpanded parameter packs, recursively. | |||
2204 | if (::DiagnoseUnexpandedParameterPacks(*this, NewTemplateParm)) { | |||
2205 | Invalid = true; | |||
2206 | continue; | |||
2207 | } | |||
2208 | ||||
2209 | // Check the presence of a default argument here. | |||
2210 | if (NewTemplateParm->hasDefaultArgument() && | |||
2211 | DiagnoseDefaultTemplateArgument(*this, TPC, | |||
2212 | NewTemplateParm->getLocation(), | |||
2213 | NewTemplateParm->getDefaultArgument().getSourceRange())) | |||
2214 | NewTemplateParm->removeDefaultArgument(); | |||
2215 | ||||
2216 | // Merge default arguments for template template parameters | |||
2217 | TemplateTemplateParmDecl *OldTemplateParm | |||
2218 | = OldParams? cast<TemplateTemplateParmDecl>(*OldParam) : nullptr; | |||
2219 | if (NewTemplateParm->isParameterPack()) { | |||
2220 | assert(!NewTemplateParm->hasDefaultArgument() &&(static_cast <bool> (!NewTemplateParm->hasDefaultArgument () && "Parameter packs can't have a default argument!" ) ? void (0) : __assert_fail ("!NewTemplateParm->hasDefaultArgument() && \"Parameter packs can't have a default argument!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 2221, __extension__ __PRETTY_FUNCTION__)) | |||
2221 | "Parameter packs can't have a default argument!")(static_cast <bool> (!NewTemplateParm->hasDefaultArgument () && "Parameter packs can't have a default argument!" ) ? void (0) : __assert_fail ("!NewTemplateParm->hasDefaultArgument() && \"Parameter packs can't have a default argument!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 2221, __extension__ __PRETTY_FUNCTION__)); | |||
2222 | if (!NewTemplateParm->isPackExpansion()) | |||
2223 | SawParameterPack = true; | |||
2224 | } else if (OldTemplateParm && | |||
2225 | hasVisibleDefaultArgument(OldTemplateParm) && | |||
2226 | NewTemplateParm->hasDefaultArgument()) { | |||
2227 | OldDefaultLoc = OldTemplateParm->getDefaultArgument().getLocation(); | |||
2228 | NewDefaultLoc = NewTemplateParm->getDefaultArgument().getLocation(); | |||
2229 | SawDefaultArgument = true; | |||
2230 | RedundantDefaultArg = true; | |||
2231 | PreviousDefaultArgLoc = NewDefaultLoc; | |||
2232 | } else if (OldTemplateParm && OldTemplateParm->hasDefaultArgument()) { | |||
2233 | // Merge the default argument from the old declaration to the | |||
2234 | // new declaration. | |||
2235 | NewTemplateParm->setInheritedDefaultArgument(Context, OldTemplateParm); | |||
2236 | PreviousDefaultArgLoc | |||
2237 | = OldTemplateParm->getDefaultArgument().getLocation(); | |||
2238 | } else if (NewTemplateParm->hasDefaultArgument()) { | |||
2239 | SawDefaultArgument = true; | |||
2240 | PreviousDefaultArgLoc | |||
2241 | = NewTemplateParm->getDefaultArgument().getLocation(); | |||
2242 | } else if (SawDefaultArgument) | |||
2243 | MissingDefaultArg = true; | |||
2244 | } | |||
2245 | ||||
2246 | // C++11 [temp.param]p11: | |||
2247 | // If a template parameter of a primary class template or alias template | |||
2248 | // is a template parameter pack, it shall be the last template parameter. | |||
2249 | if (SawParameterPack && (NewParam + 1) != NewParamEnd && | |||
2250 | (TPC == TPC_ClassTemplate || TPC == TPC_VarTemplate || | |||
2251 | TPC == TPC_TypeAliasTemplate)) { | |||
2252 | Diag((*NewParam)->getLocation(), | |||
2253 | diag::err_template_param_pack_must_be_last_template_parameter); | |||
2254 | Invalid = true; | |||
2255 | } | |||
2256 | ||||
2257 | if (RedundantDefaultArg) { | |||
2258 | // C++ [temp.param]p12: | |||
2259 | // A template-parameter shall not be given default arguments | |||
2260 | // by two different declarations in the same scope. | |||
2261 | Diag(NewDefaultLoc, diag::err_template_param_default_arg_redefinition); | |||
2262 | Diag(OldDefaultLoc, diag::note_template_param_prev_default_arg); | |||
2263 | Invalid = true; | |||
2264 | } else if (MissingDefaultArg && TPC != TPC_FunctionTemplate) { | |||
2265 | // C++ [temp.param]p11: | |||
2266 | // If a template-parameter of a class template has a default | |||
2267 | // template-argument, each subsequent template-parameter shall either | |||
2268 | // have a default template-argument supplied or be a template parameter | |||
2269 | // pack. | |||
2270 | Diag((*NewParam)->getLocation(), | |||
2271 | diag::err_template_param_default_arg_missing); | |||
2272 | Diag(PreviousDefaultArgLoc, diag::note_template_param_prev_default_arg); | |||
2273 | Invalid = true; | |||
2274 | RemoveDefaultArguments = true; | |||
2275 | } | |||
2276 | ||||
2277 | // If we have an old template parameter list that we're merging | |||
2278 | // in, move on to the next parameter. | |||
2279 | if (OldParams) | |||
2280 | ++OldParam; | |||
2281 | } | |||
2282 | ||||
2283 | // We were missing some default arguments at the end of the list, so remove | |||
2284 | // all of the default arguments. | |||
2285 | if (RemoveDefaultArguments) { | |||
2286 | for (TemplateParameterList::iterator NewParam = NewParams->begin(), | |||
2287 | NewParamEnd = NewParams->end(); | |||
2288 | NewParam != NewParamEnd; ++NewParam) { | |||
2289 | if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*NewParam)) | |||
2290 | TTP->removeDefaultArgument(); | |||
2291 | else if (NonTypeTemplateParmDecl *NTTP | |||
2292 | = dyn_cast<NonTypeTemplateParmDecl>(*NewParam)) | |||
2293 | NTTP->removeDefaultArgument(); | |||
2294 | else | |||
2295 | cast<TemplateTemplateParmDecl>(*NewParam)->removeDefaultArgument(); | |||
2296 | } | |||
2297 | } | |||
2298 | ||||
2299 | return Invalid; | |||
2300 | } | |||
2301 | ||||
2302 | namespace { | |||
2303 | ||||
2304 | /// A class which looks for a use of a certain level of template | |||
2305 | /// parameter. | |||
2306 | struct DependencyChecker : RecursiveASTVisitor<DependencyChecker> { | |||
2307 | typedef RecursiveASTVisitor<DependencyChecker> super; | |||
2308 | ||||
2309 | unsigned Depth; | |||
2310 | ||||
2311 | // Whether we're looking for a use of a template parameter that makes the | |||
2312 | // overall construct type-dependent / a dependent type. This is strictly | |||
2313 | // best-effort for now; we may fail to match at all for a dependent type | |||
2314 | // in some cases if this is set. | |||
2315 | bool IgnoreNonTypeDependent; | |||
2316 | ||||
2317 | bool Match; | |||
2318 | SourceLocation MatchLoc; | |||
2319 | ||||
2320 | DependencyChecker(unsigned Depth, bool IgnoreNonTypeDependent) | |||
2321 | : Depth(Depth), IgnoreNonTypeDependent(IgnoreNonTypeDependent), | |||
2322 | Match(false) {} | |||
2323 | ||||
2324 | DependencyChecker(TemplateParameterList *Params, bool IgnoreNonTypeDependent) | |||
2325 | : IgnoreNonTypeDependent(IgnoreNonTypeDependent), Match(false) { | |||
2326 | NamedDecl *ND = Params->getParam(0); | |||
2327 | if (TemplateTypeParmDecl *PD = dyn_cast<TemplateTypeParmDecl>(ND)) { | |||
2328 | Depth = PD->getDepth(); | |||
2329 | } else if (NonTypeTemplateParmDecl *PD = | |||
2330 | dyn_cast<NonTypeTemplateParmDecl>(ND)) { | |||
2331 | Depth = PD->getDepth(); | |||
2332 | } else { | |||
2333 | Depth = cast<TemplateTemplateParmDecl>(ND)->getDepth(); | |||
2334 | } | |||
2335 | } | |||
2336 | ||||
2337 | bool Matches(unsigned ParmDepth, SourceLocation Loc = SourceLocation()) { | |||
2338 | if (ParmDepth >= Depth) { | |||
2339 | Match = true; | |||
2340 | MatchLoc = Loc; | |||
2341 | return true; | |||
2342 | } | |||
2343 | return false; | |||
2344 | } | |||
2345 | ||||
2346 | bool TraverseStmt(Stmt *S, DataRecursionQueue *Q = nullptr) { | |||
2347 | // Prune out non-type-dependent expressions if requested. This can | |||
2348 | // sometimes result in us failing to find a template parameter reference | |||
2349 | // (if a value-dependent expression creates a dependent type), but this | |||
2350 | // mode is best-effort only. | |||
2351 | if (auto *E = dyn_cast_or_null<Expr>(S)) | |||
2352 | if (IgnoreNonTypeDependent && !E->isTypeDependent()) | |||
2353 | return true; | |||
2354 | return super::TraverseStmt(S, Q); | |||
2355 | } | |||
2356 | ||||
2357 | bool TraverseTypeLoc(TypeLoc TL) { | |||
2358 | if (IgnoreNonTypeDependent && !TL.isNull() && | |||
2359 | !TL.getType()->isDependentType()) | |||
2360 | return true; | |||
2361 | return super::TraverseTypeLoc(TL); | |||
2362 | } | |||
2363 | ||||
2364 | bool VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) { | |||
2365 | return !Matches(TL.getTypePtr()->getDepth(), TL.getNameLoc()); | |||
2366 | } | |||
2367 | ||||
2368 | bool VisitTemplateTypeParmType(const TemplateTypeParmType *T) { | |||
2369 | // For a best-effort search, keep looking until we find a location. | |||
2370 | return IgnoreNonTypeDependent || !Matches(T->getDepth()); | |||
2371 | } | |||
2372 | ||||
2373 | bool TraverseTemplateName(TemplateName N) { | |||
2374 | if (TemplateTemplateParmDecl *PD = | |||
2375 | dyn_cast_or_null<TemplateTemplateParmDecl>(N.getAsTemplateDecl())) | |||
2376 | if (Matches(PD->getDepth())) | |||
2377 | return false; | |||
2378 | return super::TraverseTemplateName(N); | |||
2379 | } | |||
2380 | ||||
2381 | bool VisitDeclRefExpr(DeclRefExpr *E) { | |||
2382 | if (NonTypeTemplateParmDecl *PD = | |||
2383 | dyn_cast<NonTypeTemplateParmDecl>(E->getDecl())) | |||
2384 | if (Matches(PD->getDepth(), E->getExprLoc())) | |||
2385 | return false; | |||
2386 | return super::VisitDeclRefExpr(E); | |||
2387 | } | |||
2388 | ||||
2389 | bool VisitSubstTemplateTypeParmType(const SubstTemplateTypeParmType *T) { | |||
2390 | return TraverseType(T->getReplacementType()); | |||
2391 | } | |||
2392 | ||||
2393 | bool | |||
2394 | VisitSubstTemplateTypeParmPackType(const SubstTemplateTypeParmPackType *T) { | |||
2395 | return TraverseTemplateArgument(T->getArgumentPack()); | |||
2396 | } | |||
2397 | ||||
2398 | bool TraverseInjectedClassNameType(const InjectedClassNameType *T) { | |||
2399 | return TraverseType(T->getInjectedSpecializationType()); | |||
2400 | } | |||
2401 | }; | |||
2402 | } // end anonymous namespace | |||
2403 | ||||
2404 | /// Determines whether a given type depends on the given parameter | |||
2405 | /// list. | |||
2406 | static bool | |||
2407 | DependsOnTemplateParameters(QualType T, TemplateParameterList *Params) { | |||
2408 | DependencyChecker Checker(Params, /*IgnoreNonTypeDependent*/false); | |||
2409 | Checker.TraverseType(T); | |||
2410 | return Checker.Match; | |||
2411 | } | |||
2412 | ||||
2413 | // Find the source range corresponding to the named type in the given | |||
2414 | // nested-name-specifier, if any. | |||
2415 | static SourceRange getRangeOfTypeInNestedNameSpecifier(ASTContext &Context, | |||
2416 | QualType T, | |||
2417 | const CXXScopeSpec &SS) { | |||
2418 | NestedNameSpecifierLoc NNSLoc(SS.getScopeRep(), SS.location_data()); | |||
2419 | while (NestedNameSpecifier *NNS = NNSLoc.getNestedNameSpecifier()) { | |||
2420 | if (const Type *CurType = NNS->getAsType()) { | |||
2421 | if (Context.hasSameUnqualifiedType(T, QualType(CurType, 0))) | |||
2422 | return NNSLoc.getTypeLoc().getSourceRange(); | |||
2423 | } else | |||
2424 | break; | |||
2425 | ||||
2426 | NNSLoc = NNSLoc.getPrefix(); | |||
2427 | } | |||
2428 | ||||
2429 | return SourceRange(); | |||
2430 | } | |||
2431 | ||||
2432 | /// \brief Match the given template parameter lists to the given scope | |||
2433 | /// specifier, returning the template parameter list that applies to the | |||
2434 | /// name. | |||
2435 | /// | |||
2436 | /// \param DeclStartLoc the start of the declaration that has a scope | |||
2437 | /// specifier or a template parameter list. | |||
2438 | /// | |||
2439 | /// \param DeclLoc The location of the declaration itself. | |||
2440 | /// | |||
2441 | /// \param SS the scope specifier that will be matched to the given template | |||
2442 | /// parameter lists. This scope specifier precedes a qualified name that is | |||
2443 | /// being declared. | |||
2444 | /// | |||
2445 | /// \param TemplateId The template-id following the scope specifier, if there | |||
2446 | /// is one. Used to check for a missing 'template<>'. | |||
2447 | /// | |||
2448 | /// \param ParamLists the template parameter lists, from the outermost to the | |||
2449 | /// innermost template parameter lists. | |||
2450 | /// | |||
2451 | /// \param IsFriend Whether to apply the slightly different rules for | |||
2452 | /// matching template parameters to scope specifiers in friend | |||
2453 | /// declarations. | |||
2454 | /// | |||
2455 | /// \param IsMemberSpecialization will be set true if the scope specifier | |||
2456 | /// denotes a fully-specialized type, and therefore this is a declaration of | |||
2457 | /// a member specialization. | |||
2458 | /// | |||
2459 | /// \returns the template parameter list, if any, that corresponds to the | |||
2460 | /// name that is preceded by the scope specifier @p SS. This template | |||
2461 | /// parameter list may have template parameters (if we're declaring a | |||
2462 | /// template) or may have no template parameters (if we're declaring a | |||
2463 | /// template specialization), or may be NULL (if what we're declaring isn't | |||
2464 | /// itself a template). | |||
2465 | TemplateParameterList *Sema::MatchTemplateParametersToScopeSpecifier( | |||
2466 | SourceLocation DeclStartLoc, SourceLocation DeclLoc, const CXXScopeSpec &SS, | |||
2467 | TemplateIdAnnotation *TemplateId, | |||
2468 | ArrayRef<TemplateParameterList *> ParamLists, bool IsFriend, | |||
2469 | bool &IsMemberSpecialization, bool &Invalid) { | |||
2470 | IsMemberSpecialization = false; | |||
2471 | Invalid = false; | |||
2472 | ||||
2473 | // The sequence of nested types to which we will match up the template | |||
2474 | // parameter lists. We first build this list by starting with the type named | |||
2475 | // by the nested-name-specifier and walking out until we run out of types. | |||
2476 | SmallVector<QualType, 4> NestedTypes; | |||
2477 | QualType T; | |||
2478 | if (SS.getScopeRep()) { | |||
2479 | if (CXXRecordDecl *Record | |||
2480 | = dyn_cast_or_null<CXXRecordDecl>(computeDeclContext(SS, true))) | |||
2481 | T = Context.getTypeDeclType(Record); | |||
2482 | else | |||
2483 | T = QualType(SS.getScopeRep()->getAsType(), 0); | |||
2484 | } | |||
2485 | ||||
2486 | // If we found an explicit specialization that prevents us from needing | |||
2487 | // 'template<>' headers, this will be set to the location of that | |||
2488 | // explicit specialization. | |||
2489 | SourceLocation ExplicitSpecLoc; | |||
2490 | ||||
2491 | while (!T.isNull()) { | |||
2492 | NestedTypes.push_back(T); | |||
2493 | ||||
2494 | // Retrieve the parent of a record type. | |||
2495 | if (CXXRecordDecl *Record = T->getAsCXXRecordDecl()) { | |||
2496 | // If this type is an explicit specialization, we're done. | |||
2497 | if (ClassTemplateSpecializationDecl *Spec | |||
2498 | = dyn_cast<ClassTemplateSpecializationDecl>(Record)) { | |||
2499 | if (!isa<ClassTemplatePartialSpecializationDecl>(Spec) && | |||
2500 | Spec->getSpecializationKind() == TSK_ExplicitSpecialization) { | |||
2501 | ExplicitSpecLoc = Spec->getLocation(); | |||
2502 | break; | |||
2503 | } | |||
2504 | } else if (Record->getTemplateSpecializationKind() | |||
2505 | == TSK_ExplicitSpecialization) { | |||
2506 | ExplicitSpecLoc = Record->getLocation(); | |||
2507 | break; | |||
2508 | } | |||
2509 | ||||
2510 | if (TypeDecl *Parent = dyn_cast<TypeDecl>(Record->getParent())) | |||
2511 | T = Context.getTypeDeclType(Parent); | |||
2512 | else | |||
2513 | T = QualType(); | |||
2514 | continue; | |||
2515 | } | |||
2516 | ||||
2517 | if (const TemplateSpecializationType *TST | |||
2518 | = T->getAs<TemplateSpecializationType>()) { | |||
2519 | if (TemplateDecl *Template = TST->getTemplateName().getAsTemplateDecl()) { | |||
2520 | if (TypeDecl *Parent = dyn_cast<TypeDecl>(Template->getDeclContext())) | |||
2521 | T = Context.getTypeDeclType(Parent); | |||
2522 | else | |||
2523 | T = QualType(); | |||
2524 | continue; | |||
2525 | } | |||
2526 | } | |||
2527 | ||||
2528 | // Look one step prior in a dependent template specialization type. | |||
2529 | if (const DependentTemplateSpecializationType *DependentTST | |||
2530 | = T->getAs<DependentTemplateSpecializationType>()) { | |||
2531 | if (NestedNameSpecifier *NNS = DependentTST->getQualifier()) | |||
2532 | T = QualType(NNS->getAsType(), 0); | |||
2533 | else | |||
2534 | T = QualType(); | |||
2535 | continue; | |||
2536 | } | |||
2537 | ||||
2538 | // Look one step prior in a dependent name type. | |||
2539 | if (const DependentNameType *DependentName = T->getAs<DependentNameType>()){ | |||
2540 | if (NestedNameSpecifier *NNS = DependentName->getQualifier()) | |||
2541 | T = QualType(NNS->getAsType(), 0); | |||
2542 | else | |||
2543 | T = QualType(); | |||
2544 | continue; | |||
2545 | } | |||
2546 | ||||
2547 | // Retrieve the parent of an enumeration type. | |||
2548 | if (const EnumType *EnumT = T->getAs<EnumType>()) { | |||
2549 | // FIXME: Forward-declared enums require a TSK_ExplicitSpecialization | |||
2550 | // check here. | |||
2551 | EnumDecl *Enum = EnumT->getDecl(); | |||
2552 | ||||
2553 | // Get to the parent type. | |||
2554 | if (TypeDecl *Parent = dyn_cast<TypeDecl>(Enum->getParent())) | |||
2555 | T = Context.getTypeDeclType(Parent); | |||
2556 | else | |||
2557 | T = QualType(); | |||
2558 | continue; | |||
2559 | } | |||
2560 | ||||
2561 | T = QualType(); | |||
2562 | } | |||
2563 | // Reverse the nested types list, since we want to traverse from the outermost | |||
2564 | // to the innermost while checking template-parameter-lists. | |||
2565 | std::reverse(NestedTypes.begin(), NestedTypes.end()); | |||
2566 | ||||
2567 | // C++0x [temp.expl.spec]p17: | |||
2568 | // A member or a member template may be nested within many | |||
2569 | // enclosing class templates. In an explicit specialization for | |||
2570 | // such a member, the member declaration shall be preceded by a | |||
2571 | // template<> for each enclosing class template that is | |||
2572 | // explicitly specialized. | |||
2573 | bool SawNonEmptyTemplateParameterList = false; | |||
2574 | ||||
2575 | auto CheckExplicitSpecialization = [&](SourceRange Range, bool Recovery) { | |||
2576 | if (SawNonEmptyTemplateParameterList) { | |||
2577 | Diag(DeclLoc, diag::err_specialize_member_of_template) | |||
2578 | << !Recovery << Range; | |||
2579 | Invalid = true; | |||
2580 | IsMemberSpecialization = false; | |||
2581 | return true; | |||
2582 | } | |||
2583 | ||||
2584 | return false; | |||
2585 | }; | |||
2586 | ||||
2587 | auto DiagnoseMissingExplicitSpecialization = [&] (SourceRange Range) { | |||
2588 | // Check that we can have an explicit specialization here. | |||
2589 | if (CheckExplicitSpecialization(Range, true)) | |||
2590 | return true; | |||
2591 | ||||
2592 | // We don't have a template header, but we should. | |||
2593 | SourceLocation ExpectedTemplateLoc; | |||
2594 | if (!ParamLists.empty()) | |||
2595 | ExpectedTemplateLoc = ParamLists[0]->getTemplateLoc(); | |||
2596 | else | |||
2597 | ExpectedTemplateLoc = DeclStartLoc; | |||
2598 | ||||
2599 | Diag(DeclLoc, diag::err_template_spec_needs_header) | |||
2600 | << Range | |||
2601 | << FixItHint::CreateInsertion(ExpectedTemplateLoc, "template<> "); | |||
2602 | return false; | |||
2603 | }; | |||
2604 | ||||
2605 | unsigned ParamIdx = 0; | |||
2606 | for (unsigned TypeIdx = 0, NumTypes = NestedTypes.size(); TypeIdx != NumTypes; | |||
2607 | ++TypeIdx) { | |||
2608 | T = NestedTypes[TypeIdx]; | |||
2609 | ||||
2610 | // Whether we expect a 'template<>' header. | |||
2611 | bool NeedEmptyTemplateHeader = false; | |||
2612 | ||||
2613 | // Whether we expect a template header with parameters. | |||
2614 | bool NeedNonemptyTemplateHeader = false; | |||
2615 | ||||
2616 | // For a dependent type, the set of template parameters that we | |||
2617 | // expect to see. | |||
2618 | TemplateParameterList *ExpectedTemplateParams = nullptr; | |||
2619 | ||||
2620 | // C++0x [temp.expl.spec]p15: | |||
2621 | // A member or a member template may be nested within many enclosing | |||
2622 | // class templates. In an explicit specialization for such a member, the | |||
2623 | // member declaration shall be preceded by a template<> for each | |||
2624 | // enclosing class template that is explicitly specialized. | |||
2625 | if (CXXRecordDecl *Record = T->getAsCXXRecordDecl()) { | |||
2626 | if (ClassTemplatePartialSpecializationDecl *Partial | |||
2627 | = dyn_cast<ClassTemplatePartialSpecializationDecl>(Record)) { | |||
2628 | ExpectedTemplateParams = Partial->getTemplateParameters(); | |||
2629 | NeedNonemptyTemplateHeader = true; | |||
2630 | } else if (Record->isDependentType()) { | |||
2631 | if (Record->getDescribedClassTemplate()) { | |||
2632 | ExpectedTemplateParams = Record->getDescribedClassTemplate() | |||
2633 | ->getTemplateParameters(); | |||
2634 | NeedNonemptyTemplateHeader = true; | |||
2635 | } | |||
2636 | } else if (ClassTemplateSpecializationDecl *Spec | |||
2637 | = dyn_cast<ClassTemplateSpecializationDecl>(Record)) { | |||
2638 | // C++0x [temp.expl.spec]p4: | |||
2639 | // Members of an explicitly specialized class template are defined | |||
2640 | // in the same manner as members of normal classes, and not using | |||
2641 | // the template<> syntax. | |||
2642 | if (Spec->getSpecializationKind() != TSK_ExplicitSpecialization) | |||
2643 | NeedEmptyTemplateHeader = true; | |||
2644 | else | |||
2645 | continue; | |||
2646 | } else if (Record->getTemplateSpecializationKind()) { | |||
2647 | if (Record->getTemplateSpecializationKind() | |||
2648 | != TSK_ExplicitSpecialization && | |||
2649 | TypeIdx == NumTypes - 1) | |||
2650 | IsMemberSpecialization = true; | |||
2651 | ||||
2652 | continue; | |||
2653 | } | |||
2654 | } else if (const TemplateSpecializationType *TST | |||
2655 | = T->getAs<TemplateSpecializationType>()) { | |||
2656 | if (TemplateDecl *Template = TST->getTemplateName().getAsTemplateDecl()) { | |||
2657 | ExpectedTemplateParams = Template->getTemplateParameters(); | |||
2658 | NeedNonemptyTemplateHeader = true; | |||
2659 | } | |||
2660 | } else if (T->getAs<DependentTemplateSpecializationType>()) { | |||
2661 | // FIXME: We actually could/should check the template arguments here | |||
2662 | // against the corresponding template parameter list. | |||
2663 | NeedNonemptyTemplateHeader = false; | |||
2664 | } | |||
2665 | ||||
2666 | // C++ [temp.expl.spec]p16: | |||
2667 | // In an explicit specialization declaration for a member of a class | |||
2668 | // template or a member template that ap- pears in namespace scope, the | |||
2669 | // member template and some of its enclosing class templates may remain | |||
2670 | // unspecialized, except that the declaration shall not explicitly | |||
2671 | // specialize a class member template if its en- closing class templates | |||
2672 | // are not explicitly specialized as well. | |||
2673 | if (ParamIdx < ParamLists.size()) { | |||
2674 | if (ParamLists[ParamIdx]->size() == 0) { | |||
2675 | if (CheckExplicitSpecialization(ParamLists[ParamIdx]->getSourceRange(), | |||
2676 | false)) | |||
2677 | return nullptr; | |||
2678 | } else | |||
2679 | SawNonEmptyTemplateParameterList = true; | |||
2680 | } | |||
2681 | ||||
2682 | if (NeedEmptyTemplateHeader) { | |||
2683 | // If we're on the last of the types, and we need a 'template<>' header | |||
2684 | // here, then it's a member specialization. | |||
2685 | if (TypeIdx == NumTypes - 1) | |||
2686 | IsMemberSpecialization = true; | |||
2687 | ||||
2688 | if (ParamIdx < ParamLists.size()) { | |||
2689 | if (ParamLists[ParamIdx]->size() > 0) { | |||
2690 | // The header has template parameters when it shouldn't. Complain. | |||
2691 | Diag(ParamLists[ParamIdx]->getTemplateLoc(), | |||
2692 | diag::err_template_param_list_matches_nontemplate) | |||
2693 | << T | |||
2694 | << SourceRange(ParamLists[ParamIdx]->getLAngleLoc(), | |||
2695 | ParamLists[ParamIdx]->getRAngleLoc()) | |||
2696 | << getRangeOfTypeInNestedNameSpecifier(Context, T, SS); | |||
2697 | Invalid = true; | |||
2698 | return nullptr; | |||
2699 | } | |||
2700 | ||||
2701 | // Consume this template header. | |||
2702 | ++ParamIdx; | |||
2703 | continue; | |||
2704 | } | |||
2705 | ||||
2706 | if (!IsFriend) | |||
2707 | if (DiagnoseMissingExplicitSpecialization( | |||
2708 | getRangeOfTypeInNestedNameSpecifier(Context, T, SS))) | |||
2709 | return nullptr; | |||
2710 | ||||
2711 | continue; | |||
2712 | } | |||
2713 | ||||
2714 | if (NeedNonemptyTemplateHeader) { | |||
2715 | // In friend declarations we can have template-ids which don't | |||
2716 | // depend on the corresponding template parameter lists. But | |||
2717 | // assume that empty parameter lists are supposed to match this | |||
2718 | // template-id. | |||
2719 | if (IsFriend && T->isDependentType()) { | |||
2720 | if (ParamIdx < ParamLists.size() && | |||
2721 | DependsOnTemplateParameters(T, ParamLists[ParamIdx])) | |||
2722 | ExpectedTemplateParams = nullptr; | |||
2723 | else | |||
2724 | continue; | |||
2725 | } | |||
2726 | ||||
2727 | if (ParamIdx < ParamLists.size()) { | |||
2728 | // Check the template parameter list, if we can. | |||
2729 | if (ExpectedTemplateParams && | |||
2730 | !TemplateParameterListsAreEqual(ParamLists[ParamIdx], | |||
2731 | ExpectedTemplateParams, | |||
2732 | true, TPL_TemplateMatch)) | |||
2733 | Invalid = true; | |||
2734 | ||||
2735 | if (!Invalid && | |||
2736 | CheckTemplateParameterList(ParamLists[ParamIdx], nullptr, | |||
2737 | TPC_ClassTemplateMember)) | |||
2738 | Invalid = true; | |||
2739 | ||||
2740 | ++ParamIdx; | |||
2741 | continue; | |||
2742 | } | |||
2743 | ||||
2744 | Diag(DeclLoc, diag::err_template_spec_needs_template_parameters) | |||
2745 | << T | |||
2746 | << getRangeOfTypeInNestedNameSpecifier(Context, T, SS); | |||
2747 | Invalid = true; | |||
2748 | continue; | |||
2749 | } | |||
2750 | } | |||
2751 | ||||
2752 | // If there were at least as many template-ids as there were template | |||
2753 | // parameter lists, then there are no template parameter lists remaining for | |||
2754 | // the declaration itself. | |||
2755 | if (ParamIdx >= ParamLists.size()) { | |||
2756 | if (TemplateId && !IsFriend) { | |||
2757 | // We don't have a template header for the declaration itself, but we | |||
2758 | // should. | |||
2759 | DiagnoseMissingExplicitSpecialization(SourceRange(TemplateId->LAngleLoc, | |||
2760 | TemplateId->RAngleLoc)); | |||
2761 | ||||
2762 | // Fabricate an empty template parameter list for the invented header. | |||
2763 | return TemplateParameterList::Create(Context, SourceLocation(), | |||
2764 | SourceLocation(), None, | |||
2765 | SourceLocation(), nullptr); | |||
2766 | } | |||
2767 | ||||
2768 | return nullptr; | |||
2769 | } | |||
2770 | ||||
2771 | // If there were too many template parameter lists, complain about that now. | |||
2772 | if (ParamIdx < ParamLists.size() - 1) { | |||
2773 | bool HasAnyExplicitSpecHeader = false; | |||
2774 | bool AllExplicitSpecHeaders = true; | |||
2775 | for (unsigned I = ParamIdx, E = ParamLists.size() - 1; I != E; ++I) { | |||
2776 | if (ParamLists[I]->size() == 0) | |||
2777 | HasAnyExplicitSpecHeader = true; | |||
2778 | else | |||
2779 | AllExplicitSpecHeaders = false; | |||
2780 | } | |||
2781 | ||||
2782 | Diag(ParamLists[ParamIdx]->getTemplateLoc(), | |||
2783 | AllExplicitSpecHeaders ? diag::warn_template_spec_extra_headers | |||
2784 | : diag::err_template_spec_extra_headers) | |||
2785 | << SourceRange(ParamLists[ParamIdx]->getTemplateLoc(), | |||
2786 | ParamLists[ParamLists.size() - 2]->getRAngleLoc()); | |||
2787 | ||||
2788 | // If there was a specialization somewhere, such that 'template<>' is | |||
2789 | // not required, and there were any 'template<>' headers, note where the | |||
2790 | // specialization occurred. | |||
2791 | if (ExplicitSpecLoc.isValid() && HasAnyExplicitSpecHeader) | |||
2792 | Diag(ExplicitSpecLoc, | |||
2793 | diag::note_explicit_template_spec_does_not_need_header) | |||
2794 | << NestedTypes.back(); | |||
2795 | ||||
2796 | // We have a template parameter list with no corresponding scope, which | |||
2797 | // means that the resulting template declaration can't be instantiated | |||
2798 | // properly (we'll end up with dependent nodes when we shouldn't). | |||
2799 | if (!AllExplicitSpecHeaders) | |||
2800 | Invalid = true; | |||
2801 | } | |||
2802 | ||||
2803 | // C++ [temp.expl.spec]p16: | |||
2804 | // In an explicit specialization declaration for a member of a class | |||
2805 | // template or a member template that ap- pears in namespace scope, the | |||
2806 | // member template and some of its enclosing class templates may remain | |||
2807 | // unspecialized, except that the declaration shall not explicitly | |||
2808 | // specialize a class member template if its en- closing class templates | |||
2809 | // are not explicitly specialized as well. | |||
2810 | if (ParamLists.back()->size() == 0 && | |||
2811 | CheckExplicitSpecialization(ParamLists[ParamIdx]->getSourceRange(), | |||
2812 | false)) | |||
2813 | return nullptr; | |||
2814 | ||||
2815 | // Return the last template parameter list, which corresponds to the | |||
2816 | // entity being declared. | |||
2817 | return ParamLists.back(); | |||
2818 | } | |||
2819 | ||||
2820 | void Sema::NoteAllFoundTemplates(TemplateName Name) { | |||
2821 | if (TemplateDecl *Template = Name.getAsTemplateDecl()) { | |||
2822 | Diag(Template->getLocation(), diag::note_template_declared_here) | |||
2823 | << (isa<FunctionTemplateDecl>(Template) | |||
2824 | ? 0 | |||
2825 | : isa<ClassTemplateDecl>(Template) | |||
2826 | ? 1 | |||
2827 | : isa<VarTemplateDecl>(Template) | |||
2828 | ? 2 | |||
2829 | : isa<TypeAliasTemplateDecl>(Template) ? 3 : 4) | |||
2830 | << Template->getDeclName(); | |||
2831 | return; | |||
2832 | } | |||
2833 | ||||
2834 | if (OverloadedTemplateStorage *OST = Name.getAsOverloadedTemplate()) { | |||
2835 | for (OverloadedTemplateStorage::iterator I = OST->begin(), | |||
2836 | IEnd = OST->end(); | |||
2837 | I != IEnd; ++I) | |||
2838 | Diag((*I)->getLocation(), diag::note_template_declared_here) | |||
2839 | << 0 << (*I)->getDeclName(); | |||
2840 | ||||
2841 | return; | |||
2842 | } | |||
2843 | } | |||
2844 | ||||
2845 | static QualType | |||
2846 | checkBuiltinTemplateIdType(Sema &SemaRef, BuiltinTemplateDecl *BTD, | |||
2847 | const SmallVectorImpl<TemplateArgument> &Converted, | |||
2848 | SourceLocation TemplateLoc, | |||
2849 | TemplateArgumentListInfo &TemplateArgs) { | |||
2850 | ASTContext &Context = SemaRef.getASTContext(); | |||
2851 | switch (BTD->getBuiltinTemplateKind()) { | |||
2852 | case BTK__make_integer_seq: { | |||
2853 | // Specializations of __make_integer_seq<S, T, N> are treated like | |||
2854 | // S<T, 0, ..., N-1>. | |||
2855 | ||||
2856 | // C++14 [inteseq.intseq]p1: | |||
2857 | // T shall be an integer type. | |||
2858 | if (!Converted[1].getAsType()->isIntegralType(Context)) { | |||
2859 | SemaRef.Diag(TemplateArgs[1].getLocation(), | |||
2860 | diag::err_integer_sequence_integral_element_type); | |||
2861 | return QualType(); | |||
2862 | } | |||
2863 | ||||
2864 | // C++14 [inteseq.make]p1: | |||
2865 | // If N is negative the program is ill-formed. | |||
2866 | TemplateArgument NumArgsArg = Converted[2]; | |||
2867 | llvm::APSInt NumArgs = NumArgsArg.getAsIntegral(); | |||
2868 | if (NumArgs < 0) { | |||
2869 | SemaRef.Diag(TemplateArgs[2].getLocation(), | |||
2870 | diag::err_integer_sequence_negative_length); | |||
2871 | return QualType(); | |||
2872 | } | |||
2873 | ||||
2874 | QualType ArgTy = NumArgsArg.getIntegralType(); | |||
2875 | TemplateArgumentListInfo SyntheticTemplateArgs; | |||
2876 | // The type argument gets reused as the first template argument in the | |||
2877 | // synthetic template argument list. | |||
2878 | SyntheticTemplateArgs.addArgument(TemplateArgs[1]); | |||
2879 | // Expand N into 0 ... N-1. | |||
2880 | for (llvm::APSInt I(NumArgs.getBitWidth(), NumArgs.isUnsigned()); | |||
2881 | I < NumArgs; ++I) { | |||
2882 | TemplateArgument TA(Context, I, ArgTy); | |||
2883 | SyntheticTemplateArgs.addArgument(SemaRef.getTrivialTemplateArgumentLoc( | |||
2884 | TA, ArgTy, TemplateArgs[2].getLocation())); | |||
2885 | } | |||
2886 | // The first template argument will be reused as the template decl that | |||
2887 | // our synthetic template arguments will be applied to. | |||
2888 | return SemaRef.CheckTemplateIdType(Converted[0].getAsTemplate(), | |||
2889 | TemplateLoc, SyntheticTemplateArgs); | |||
2890 | } | |||
2891 | ||||
2892 | case BTK__type_pack_element: | |||
2893 | // Specializations of | |||
2894 | // __type_pack_element<Index, T_1, ..., T_N> | |||
2895 | // are treated like T_Index. | |||
2896 | assert(Converted.size() == 2 &&(static_cast <bool> (Converted.size() == 2 && "__type_pack_element should be given an index and a parameter pack" ) ? void (0) : __assert_fail ("Converted.size() == 2 && \"__type_pack_element should be given an index and a parameter pack\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 2897, __extension__ __PRETTY_FUNCTION__)) | |||
2897 | "__type_pack_element should be given an index and a parameter pack")(static_cast <bool> (Converted.size() == 2 && "__type_pack_element should be given an index and a parameter pack" ) ? void (0) : __assert_fail ("Converted.size() == 2 && \"__type_pack_element should be given an index and a parameter pack\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 2897, __extension__ __PRETTY_FUNCTION__)); | |||
2898 | ||||
2899 | // If the Index is out of bounds, the program is ill-formed. | |||
2900 | TemplateArgument IndexArg = Converted[0], Ts = Converted[1]; | |||
2901 | llvm::APSInt Index = IndexArg.getAsIntegral(); | |||
2902 | assert(Index >= 0 && "the index used with __type_pack_element should be of "(static_cast <bool> (Index >= 0 && "the index used with __type_pack_element should be of " "type std::size_t, and hence be non-negative") ? 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-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 2903, __extension__ __PRETTY_FUNCTION__)) | |||
2903 | "type std::size_t, and hence be non-negative")(static_cast <bool> (Index >= 0 && "the index used with __type_pack_element should be of " "type std::size_t, and hence be non-negative") ? 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-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 2903, __extension__ __PRETTY_FUNCTION__)); | |||
2904 | if (Index >= Ts.pack_size()) { | |||
2905 | SemaRef.Diag(TemplateArgs[0].getLocation(), | |||
2906 | diag::err_type_pack_element_out_of_bounds); | |||
2907 | return QualType(); | |||
2908 | } | |||
2909 | ||||
2910 | // We simply return the type at index `Index`. | |||
2911 | auto Nth = std::next(Ts.pack_begin(), Index.getExtValue()); | |||
2912 | return Nth->getAsType(); | |||
2913 | } | |||
2914 | llvm_unreachable("unexpected BuiltinTemplateDecl!")::llvm::llvm_unreachable_internal("unexpected BuiltinTemplateDecl!" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 2914); | |||
2915 | } | |||
2916 | ||||
2917 | /// Determine whether this alias template is "enable_if_t". | |||
2918 | static bool isEnableIfAliasTemplate(TypeAliasTemplateDecl *AliasTemplate) { | |||
2919 | return AliasTemplate->getName().equals("enable_if_t"); | |||
2920 | } | |||
2921 | ||||
2922 | /// Collect all of the separable terms in the given condition, which | |||
2923 | /// might be a conjunction. | |||
2924 | /// | |||
2925 | /// FIXME: The right answer is to convert the logical expression into | |||
2926 | /// disjunctive normal form, so we can find the first failed term | |||
2927 | /// within each possible clause. | |||
2928 | static void collectConjunctionTerms(Expr *Clause, | |||
2929 | SmallVectorImpl<Expr *> &Terms) { | |||
2930 | if (auto BinOp = dyn_cast<BinaryOperator>(Clause->IgnoreParenImpCasts())) { | |||
2931 | if (BinOp->getOpcode() == BO_LAnd) { | |||
2932 | collectConjunctionTerms(BinOp->getLHS(), Terms); | |||
2933 | collectConjunctionTerms(BinOp->getRHS(), Terms); | |||
2934 | } | |||
2935 | ||||
2936 | return; | |||
2937 | } | |||
2938 | ||||
2939 | Terms.push_back(Clause); | |||
2940 | } | |||
2941 | ||||
2942 | // The ranges-v3 library uses an odd pattern of a top-level "||" with | |||
2943 | // a left-hand side that is value-dependent but never true. Identify | |||
2944 | // the idiom and ignore that term. | |||
2945 | static Expr *lookThroughRangesV3Condition(Preprocessor &PP, Expr *Cond) { | |||
2946 | // Top-level '||'. | |||
2947 | auto *BinOp = dyn_cast<BinaryOperator>(Cond->IgnoreParenImpCasts()); | |||
2948 | if (!BinOp) return Cond; | |||
2949 | ||||
2950 | if (BinOp->getOpcode() != BO_LOr) return Cond; | |||
2951 | ||||
2952 | // With an inner '==' that has a literal on the right-hand side. | |||
2953 | Expr *LHS = BinOp->getLHS(); | |||
2954 | auto *InnerBinOp = dyn_cast<BinaryOperator>(LHS->IgnoreParenImpCasts()); | |||
2955 | if (!InnerBinOp) return Cond; | |||
2956 | ||||
2957 | if (InnerBinOp->getOpcode() != BO_EQ || | |||
2958 | !isa<IntegerLiteral>(InnerBinOp->getRHS())) | |||
2959 | return Cond; | |||
2960 | ||||
2961 | // If the inner binary operation came from a macro expansion named | |||
2962 | // CONCEPT_REQUIRES or CONCEPT_REQUIRES_, return the right-hand side | |||
2963 | // of the '||', which is the real, user-provided condition. | |||
2964 | SourceLocation Loc = InnerBinOp->getExprLoc(); | |||
2965 | if (!Loc.isMacroID()) return Cond; | |||
2966 | ||||
2967 | StringRef MacroName = PP.getImmediateMacroName(Loc); | |||
2968 | if (MacroName == "CONCEPT_REQUIRES" || MacroName == "CONCEPT_REQUIRES_") | |||
2969 | return BinOp->getRHS(); | |||
2970 | ||||
2971 | return Cond; | |||
2972 | } | |||
2973 | ||||
2974 | std::pair<Expr *, std::string> | |||
2975 | Sema::findFailedBooleanCondition(Expr *Cond, bool AllowTopLevelCond) { | |||
2976 | Cond = lookThroughRangesV3Condition(PP, Cond); | |||
2977 | ||||
2978 | // Separate out all of the terms in a conjunction. | |||
2979 | SmallVector<Expr *, 4> Terms; | |||
2980 | collectConjunctionTerms(Cond, Terms); | |||
2981 | ||||
2982 | // Determine which term failed. | |||
2983 | Expr *FailedCond = nullptr; | |||
2984 | for (Expr *Term : Terms) { | |||
2985 | Expr *TermAsWritten = Term->IgnoreParenImpCasts(); | |||
2986 | ||||
2987 | // Literals are uninteresting. | |||
2988 | if (isa<CXXBoolLiteralExpr>(TermAsWritten) || | |||
2989 | isa<IntegerLiteral>(TermAsWritten)) | |||
2990 | continue; | |||
2991 | ||||
2992 | // The initialization of the parameter from the argument is | |||
2993 | // a constant-evaluated context. | |||
2994 | EnterExpressionEvaluationContext ConstantEvaluated( | |||
2995 | *this, Sema::ExpressionEvaluationContext::ConstantEvaluated); | |||
2996 | ||||
2997 | bool Succeeded; | |||
2998 | if (Term->EvaluateAsBooleanCondition(Succeeded, Context) && | |||
2999 | !Succeeded) { | |||
3000 | FailedCond = TermAsWritten; | |||
3001 | break; | |||
3002 | } | |||
3003 | } | |||
3004 | ||||
3005 | if (!FailedCond) { | |||
3006 | if (!AllowTopLevelCond) | |||
3007 | return { nullptr, "" }; | |||
3008 | ||||
3009 | FailedCond = Cond->IgnoreParenImpCasts(); | |||
3010 | } | |||
3011 | ||||
3012 | std::string Description; | |||
3013 | { | |||
3014 | llvm::raw_string_ostream Out(Description); | |||
3015 | FailedCond->printPretty(Out, nullptr, getPrintingPolicy()); | |||
3016 | } | |||
3017 | return { FailedCond, Description }; | |||
3018 | } | |||
3019 | ||||
3020 | QualType Sema::CheckTemplateIdType(TemplateName Name, | |||
3021 | SourceLocation TemplateLoc, | |||
3022 | TemplateArgumentListInfo &TemplateArgs) { | |||
3023 | DependentTemplateName *DTN | |||
3024 | = Name.getUnderlying().getAsDependentTemplateName(); | |||
3025 | if (DTN && DTN->isIdentifier()) | |||
3026 | // When building a template-id where the template-name is dependent, | |||
3027 | // assume the template is a type template. Either our assumption is | |||
3028 | // correct, or the code is ill-formed and will be diagnosed when the | |||
3029 | // dependent name is substituted. | |||
3030 | return Context.getDependentTemplateSpecializationType(ETK_None, | |||
3031 | DTN->getQualifier(), | |||
3032 | DTN->getIdentifier(), | |||
3033 | TemplateArgs); | |||
3034 | ||||
3035 | TemplateDecl *Template = Name.getAsTemplateDecl(); | |||
3036 | if (!Template || isa<FunctionTemplateDecl>(Template) || | |||
3037 | isa<VarTemplateDecl>(Template)) { | |||
3038 | // We might have a substituted template template parameter pack. If so, | |||
3039 | // build a template specialization type for it. | |||
3040 | if (Name.getAsSubstTemplateTemplateParmPack()) | |||
3041 | return Context.getTemplateSpecializationType(Name, TemplateArgs); | |||
3042 | ||||
3043 | Diag(TemplateLoc, diag::err_template_id_not_a_type) | |||
3044 | << Name; | |||
3045 | NoteAllFoundTemplates(Name); | |||
3046 | return QualType(); | |||
3047 | } | |||
3048 | ||||
3049 | // Check that the template argument list is well-formed for this | |||
3050 | // template. | |||
3051 | SmallVector<TemplateArgument, 4> Converted; | |||
3052 | if (CheckTemplateArgumentList(Template, TemplateLoc, TemplateArgs, | |||
3053 | false, Converted)) | |||
3054 | return QualType(); | |||
3055 | ||||
3056 | QualType CanonType; | |||
3057 | ||||
3058 | bool InstantiationDependent = false; | |||
3059 | if (TypeAliasTemplateDecl *AliasTemplate = | |||
3060 | dyn_cast<TypeAliasTemplateDecl>(Template)) { | |||
3061 | // Find the canonical type for this type alias template specialization. | |||
3062 | TypeAliasDecl *Pattern = AliasTemplate->getTemplatedDecl(); | |||
3063 | if (Pattern->isInvalidDecl()) | |||
3064 | return QualType(); | |||
3065 | ||||
3066 | TemplateArgumentList StackTemplateArgs(TemplateArgumentList::OnStack, | |||
3067 | Converted); | |||
3068 | ||||
3069 | // Only substitute for the innermost template argument list. | |||
3070 | MultiLevelTemplateArgumentList TemplateArgLists; | |||
3071 | TemplateArgLists.addOuterTemplateArguments(&StackTemplateArgs); | |||
3072 | unsigned Depth = AliasTemplate->getTemplateParameters()->getDepth(); | |||
3073 | for (unsigned I = 0; I < Depth; ++I) | |||
3074 | TemplateArgLists.addOuterTemplateArguments(None); | |||
3075 | ||||
3076 | LocalInstantiationScope Scope(*this); | |||
3077 | InstantiatingTemplate Inst(*this, TemplateLoc, Template); | |||
3078 | if (Inst.isInvalid()) | |||
3079 | return QualType(); | |||
3080 | ||||
3081 | CanonType = SubstType(Pattern->getUnderlyingType(), | |||
3082 | TemplateArgLists, AliasTemplate->getLocation(), | |||
3083 | AliasTemplate->getDeclName()); | |||
3084 | if (CanonType.isNull()) { | |||
3085 | // If this was enable_if and we failed to find the nested type | |||
3086 | // within enable_if in a SFINAE context, dig out the specific | |||
3087 | // enable_if condition that failed and present that instead. | |||
3088 | if (isEnableIfAliasTemplate(AliasTemplate)) { | |||
3089 | if (auto DeductionInfo = isSFINAEContext()) { | |||
3090 | if (*DeductionInfo && | |||
3091 | (*DeductionInfo)->hasSFINAEDiagnostic() && | |||
3092 | (*DeductionInfo)->peekSFINAEDiagnostic().second.getDiagID() == | |||
3093 | diag::err_typename_nested_not_found_enable_if && | |||
3094 | TemplateArgs[0].getArgument().getKind() | |||
3095 | == TemplateArgument::Expression) { | |||
3096 | Expr *FailedCond; | |||
3097 | std::string FailedDescription; | |||
3098 | std::tie(FailedCond, FailedDescription) = | |||
3099 | findFailedBooleanCondition( | |||
3100 | TemplateArgs[0].getSourceExpression(), | |||
3101 | /*AllowTopLevelCond=*/true); | |||
3102 | ||||
3103 | // Remove the old SFINAE diagnostic. | |||
3104 | PartialDiagnosticAt OldDiag = | |||
3105 | {SourceLocation(), PartialDiagnostic::NullDiagnostic()}; | |||
3106 | (*DeductionInfo)->takeSFINAEDiagnostic(OldDiag); | |||
3107 | ||||
3108 | // Add a new SFINAE diagnostic specifying which condition | |||
3109 | // failed. | |||
3110 | (*DeductionInfo)->addSFINAEDiagnostic( | |||
3111 | OldDiag.first, | |||
3112 | PDiag(diag::err_typename_nested_not_found_requirement) | |||
3113 | << FailedDescription | |||
3114 | << FailedCond->getSourceRange()); | |||
3115 | } | |||
3116 | } | |||
3117 | } | |||
3118 | ||||
3119 | return QualType(); | |||
3120 | } | |||
3121 | } else if (Name.isDependent() || | |||
3122 | TemplateSpecializationType::anyDependentTemplateArguments( | |||
3123 | TemplateArgs, InstantiationDependent)) { | |||
3124 | // This class template specialization is a dependent | |||
3125 | // type. Therefore, its canonical type is another class template | |||
3126 | // specialization type that contains all of the converted | |||
3127 | // arguments in canonical form. This ensures that, e.g., A<T> and | |||
3128 | // A<T, T> have identical types when A is declared as: | |||
3129 | // | |||
3130 | // template<typename T, typename U = T> struct A; | |||
3131 | CanonType = Context.getCanonicalTemplateSpecializationType(Name, Converted); | |||
3132 | ||||
3133 | // This might work out to be a current instantiation, in which | |||
3134 | // case the canonical type needs to be the InjectedClassNameType. | |||
3135 | // | |||
3136 | // TODO: in theory this could be a simple hashtable lookup; most | |||
3137 | // changes to CurContext don't change the set of current | |||
3138 | // instantiations. | |||
3139 | if (isa<ClassTemplateDecl>(Template)) { | |||
3140 | for (DeclContext *Ctx = CurContext; Ctx; Ctx = Ctx->getLookupParent()) { | |||
3141 | // If we get out to a namespace, we're done. | |||
3142 | if (Ctx->isFileContext()) break; | |||
3143 | ||||
3144 | // If this isn't a record, keep looking. | |||
3145 | CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(Ctx); | |||
3146 | if (!Record) continue; | |||
3147 | ||||
3148 | // Look for one of the two cases with InjectedClassNameTypes | |||
3149 | // and check whether it's the same template. | |||
3150 | if (!isa<ClassTemplatePartialSpecializationDecl>(Record) && | |||
3151 | !Record->getDescribedClassTemplate()) | |||
3152 | continue; | |||
3153 | ||||
3154 | // Fetch the injected class name type and check whether its | |||
3155 | // injected type is equal to the type we just built. | |||
3156 | QualType ICNT = Context.getTypeDeclType(Record); | |||
3157 | QualType Injected = cast<InjectedClassNameType>(ICNT) | |||
3158 | ->getInjectedSpecializationType(); | |||
3159 | ||||
3160 | if (CanonType != Injected->getCanonicalTypeInternal()) | |||
3161 | continue; | |||
3162 | ||||
3163 | // If so, the canonical type of this TST is the injected | |||
3164 | // class name type of the record we just found. | |||
3165 | assert(ICNT.isCanonical())(static_cast <bool> (ICNT.isCanonical()) ? void (0) : __assert_fail ("ICNT.isCanonical()", "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 3165, __extension__ __PRETTY_FUNCTION__)); | |||
3166 | CanonType = ICNT; | |||
3167 | break; | |||
3168 | } | |||
3169 | } | |||
3170 | } else if (ClassTemplateDecl *ClassTemplate | |||
3171 | = dyn_cast<ClassTemplateDecl>(Template)) { | |||
3172 | // Find the class template specialization declaration that | |||
3173 | // corresponds to these arguments. | |||
3174 | void *InsertPos = nullptr; | |||
3175 | ClassTemplateSpecializationDecl *Decl | |||
3176 | = ClassTemplate->findSpecialization(Converted, InsertPos); | |||
3177 | if (!Decl) { | |||
3178 | // This is the first time we have referenced this class template | |||
3179 | // specialization. Create the canonical declaration and add it to | |||
3180 | // the set of specializations. | |||
3181 | Decl = ClassTemplateSpecializationDecl::Create(Context, | |||
3182 | ClassTemplate->getTemplatedDecl()->getTagKind(), | |||
3183 | ClassTemplate->getDeclContext(), | |||
3184 | ClassTemplate->getTemplatedDecl()->getLocStart(), | |||
3185 | ClassTemplate->getLocation(), | |||
3186 | ClassTemplate, | |||
3187 | Converted, nullptr); | |||
3188 | ClassTemplate->AddSpecialization(Decl, InsertPos); | |||
3189 | if (ClassTemplate->isOutOfLine()) | |||
3190 | Decl->setLexicalDeclContext(ClassTemplate->getLexicalDeclContext()); | |||
3191 | } | |||
3192 | ||||
3193 | if (Decl->getSpecializationKind() == TSK_Undeclared) { | |||
3194 | MultiLevelTemplateArgumentList TemplateArgLists; | |||
3195 | TemplateArgLists.addOuterTemplateArguments(Converted); | |||
3196 | InstantiateAttrsForDecl(TemplateArgLists, ClassTemplate->getTemplatedDecl(), | |||
3197 | Decl); | |||
3198 | } | |||
3199 | ||||
3200 | // Diagnose uses of this specialization. | |||
3201 | (void)DiagnoseUseOfDecl(Decl, TemplateLoc); | |||
3202 | ||||
3203 | CanonType = Context.getTypeDeclType(Decl); | |||
3204 | assert(isa<RecordType>(CanonType) &&(static_cast <bool> (isa<RecordType>(CanonType) && "type of non-dependent specialization is not a RecordType") ? void (0) : __assert_fail ("isa<RecordType>(CanonType) && \"type of non-dependent specialization is not a RecordType\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 3205, __extension__ __PRETTY_FUNCTION__)) | |||
3205 | "type of non-dependent specialization is not a RecordType")(static_cast <bool> (isa<RecordType>(CanonType) && "type of non-dependent specialization is not a RecordType") ? void (0) : __assert_fail ("isa<RecordType>(CanonType) && \"type of non-dependent specialization is not a RecordType\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 3205, __extension__ __PRETTY_FUNCTION__)); | |||
3206 | } else if (auto *BTD = dyn_cast<BuiltinTemplateDecl>(Template)) { | |||
3207 | CanonType = checkBuiltinTemplateIdType(*this, BTD, Converted, TemplateLoc, | |||
3208 | TemplateArgs); | |||
3209 | } | |||
3210 | ||||
3211 | // Build the fully-sugared type for this class template | |||
3212 | // specialization, which refers back to the class template | |||
3213 | // specialization we created or found. | |||
3214 | return Context.getTemplateSpecializationType(Name, TemplateArgs, CanonType); | |||
3215 | } | |||
3216 | ||||
3217 | TypeResult | |||
3218 | Sema::ActOnTemplateIdType(CXXScopeSpec &SS, SourceLocation TemplateKWLoc, | |||
3219 | TemplateTy TemplateD, IdentifierInfo *TemplateII, | |||
3220 | SourceLocation TemplateIILoc, | |||
3221 | SourceLocation LAngleLoc, | |||
3222 | ASTTemplateArgsPtr TemplateArgsIn, | |||
3223 | SourceLocation RAngleLoc, | |||
3224 | bool IsCtorOrDtorName, bool IsClassName) { | |||
3225 | if (SS.isInvalid()) | |||
3226 | return true; | |||
3227 | ||||
3228 | if (!IsCtorOrDtorName && !IsClassName && SS.isSet()) { | |||
3229 | DeclContext *LookupCtx = computeDeclContext(SS, /*EnteringContext*/false); | |||
3230 | ||||
3231 | // C++ [temp.res]p3: | |||
3232 | // A qualified-id that refers to a type and in which the | |||
3233 | // nested-name-specifier depends on a template-parameter (14.6.2) | |||
3234 | // shall be prefixed by the keyword typename to indicate that the | |||
3235 | // qualified-id denotes a type, forming an | |||
3236 | // elaborated-type-specifier (7.1.5.3). | |||
3237 | if (!LookupCtx && isDependentScopeSpecifier(SS)) { | |||
3238 | Diag(SS.getBeginLoc(), diag::err_typename_missing_template) | |||
3239 | << SS.getScopeRep() << TemplateII->getName(); | |||
3240 | // Recover as if 'typename' were specified. | |||
3241 | // FIXME: This is not quite correct recovery as we don't transform SS | |||
3242 | // into the corresponding dependent form (and we don't diagnose missing | |||
3243 | // 'template' keywords within SS as a result). | |||
3244 | return ActOnTypenameType(nullptr, SourceLocation(), SS, TemplateKWLoc, | |||
3245 | TemplateD, TemplateII, TemplateIILoc, LAngleLoc, | |||
3246 | TemplateArgsIn, RAngleLoc); | |||
3247 | } | |||
3248 | ||||
3249 | // Per C++ [class.qual]p2, if the template-id was an injected-class-name, | |||
3250 | // it's not actually allowed to be used as a type in most cases. Because | |||
3251 | // we annotate it before we know whether it's valid, we have to check for | |||
3252 | // this case here. | |||
3253 | auto *LookupRD = dyn_cast_or_null<CXXRecordDecl>(LookupCtx); | |||
3254 | if (LookupRD && LookupRD->getIdentifier() == TemplateII) { | |||
3255 | Diag(TemplateIILoc, | |||
3256 | TemplateKWLoc.isInvalid() | |||
3257 | ? diag::err_out_of_line_qualified_id_type_names_constructor | |||
3258 | : diag::ext_out_of_line_qualified_id_type_names_constructor) | |||
3259 | << TemplateII << 0 /*injected-class-name used as template name*/ | |||
3260 | << 1 /*if any keyword was present, it was 'template'*/; | |||
3261 | } | |||
3262 | } | |||
3263 | ||||
3264 | TemplateName Template = TemplateD.get(); | |||
3265 | ||||
3266 | // Translate the parser's template argument list in our AST format. | |||
3267 | TemplateArgumentListInfo TemplateArgs(LAngleLoc, RAngleLoc); | |||
3268 | translateTemplateArguments(TemplateArgsIn, TemplateArgs); | |||
3269 | ||||
3270 | if (DependentTemplateName *DTN = Template.getAsDependentTemplateName()) { | |||
3271 | QualType T | |||
3272 | = Context.getDependentTemplateSpecializationType(ETK_None, | |||
3273 | DTN->getQualifier(), | |||
3274 | DTN->getIdentifier(), | |||
3275 | TemplateArgs); | |||
3276 | // Build type-source information. | |||
3277 | TypeLocBuilder TLB; | |||
3278 | DependentTemplateSpecializationTypeLoc SpecTL | |||
3279 | = TLB.push<DependentTemplateSpecializationTypeLoc>(T); | |||
3280 | SpecTL.setElaboratedKeywordLoc(SourceLocation()); | |||
3281 | SpecTL.setQualifierLoc(SS.getWithLocInContext(Context)); | |||
3282 | SpecTL.setTemplateKeywordLoc(TemplateKWLoc); | |||
3283 | SpecTL.setTemplateNameLoc(TemplateIILoc); | |||
3284 | SpecTL.setLAngleLoc(LAngleLoc); | |||
3285 | SpecTL.setRAngleLoc(RAngleLoc); | |||
3286 | for (unsigned I = 0, N = SpecTL.getNumArgs(); I != N; ++I) | |||
3287 | SpecTL.setArgLocInfo(I, TemplateArgs[I].getLocInfo()); | |||
3288 | return CreateParsedType(T, TLB.getTypeSourceInfo(Context, T)); | |||
3289 | } | |||
3290 | ||||
3291 | QualType Result = CheckTemplateIdType(Template, TemplateIILoc, TemplateArgs); | |||
3292 | if (Result.isNull()) | |||
3293 | return true; | |||
3294 | ||||
3295 | // Build type-source information. | |||
3296 | TypeLocBuilder TLB; | |||
3297 | TemplateSpecializationTypeLoc SpecTL | |||
3298 | = TLB.push<TemplateSpecializationTypeLoc>(Result); | |||
3299 | SpecTL.setTemplateKeywordLoc(TemplateKWLoc); | |||
3300 | SpecTL.setTemplateNameLoc(TemplateIILoc); | |||
3301 | SpecTL.setLAngleLoc(LAngleLoc); | |||
3302 | SpecTL.setRAngleLoc(RAngleLoc); | |||
3303 | for (unsigned i = 0, e = SpecTL.getNumArgs(); i != e; ++i) | |||
3304 | SpecTL.setArgLocInfo(i, TemplateArgs[i].getLocInfo()); | |||
3305 | ||||
3306 | // NOTE: avoid constructing an ElaboratedTypeLoc if this is a | |||
3307 | // constructor or destructor name (in such a case, the scope specifier | |||
3308 | // will be attached to the enclosing Decl or Expr node). | |||
3309 | if (SS.isNotEmpty() && !IsCtorOrDtorName) { | |||
3310 | // Create an elaborated-type-specifier containing the nested-name-specifier. | |||
3311 | Result = Context.getElaboratedType(ETK_None, SS.getScopeRep(), Result); | |||
3312 | ElaboratedTypeLoc ElabTL = TLB.push<ElaboratedTypeLoc>(Result); | |||
3313 | ElabTL.setElaboratedKeywordLoc(SourceLocation()); | |||
3314 | ElabTL.setQualifierLoc(SS.getWithLocInContext(Context)); | |||
3315 | } | |||
3316 | ||||
3317 | return CreateParsedType(Result, TLB.getTypeSourceInfo(Context, Result)); | |||
3318 | } | |||
3319 | ||||
3320 | TypeResult Sema::ActOnTagTemplateIdType(TagUseKind TUK, | |||
3321 | TypeSpecifierType TagSpec, | |||
3322 | SourceLocation TagLoc, | |||
3323 | CXXScopeSpec &SS, | |||
3324 | SourceLocation TemplateKWLoc, | |||
3325 | TemplateTy TemplateD, | |||
3326 | SourceLocation TemplateLoc, | |||
3327 | SourceLocation LAngleLoc, | |||
3328 | ASTTemplateArgsPtr TemplateArgsIn, | |||
3329 | SourceLocation RAngleLoc) { | |||
3330 | TemplateName Template = TemplateD.get(); | |||
3331 | ||||
3332 | // Translate the parser's template argument list in our AST format. | |||
3333 | TemplateArgumentListInfo TemplateArgs(LAngleLoc, RAngleLoc); | |||
3334 | translateTemplateArguments(TemplateArgsIn, TemplateArgs); | |||
3335 | ||||
3336 | // Determine the tag kind | |||
3337 | TagTypeKind TagKind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec); | |||
3338 | ElaboratedTypeKeyword Keyword | |||
3339 | = TypeWithKeyword::getKeywordForTagTypeKind(TagKind); | |||
3340 | ||||
3341 | if (DependentTemplateName *DTN = Template.getAsDependentTemplateName()) { | |||
3342 | QualType T = Context.getDependentTemplateSpecializationType(Keyword, | |||
3343 | DTN->getQualifier(), | |||
3344 | DTN->getIdentifier(), | |||
3345 | TemplateArgs); | |||
3346 | ||||
3347 | // Build type-source information. | |||
3348 | TypeLocBuilder TLB; | |||
3349 | DependentTemplateSpecializationTypeLoc SpecTL | |||
3350 | = TLB.push<DependentTemplateSpecializationTypeLoc>(T); | |||
3351 | SpecTL.setElaboratedKeywordLoc(TagLoc); | |||
3352 | SpecTL.setQualifierLoc(SS.getWithLocInContext(Context)); | |||
3353 | SpecTL.setTemplateKeywordLoc(TemplateKWLoc); | |||
3354 | SpecTL.setTemplateNameLoc(TemplateLoc); | |||
3355 | SpecTL.setLAngleLoc(LAngleLoc); | |||
3356 | SpecTL.setRAngleLoc(RAngleLoc); | |||
3357 | for (unsigned I = 0, N = SpecTL.getNumArgs(); I != N; ++I) | |||
3358 | SpecTL.setArgLocInfo(I, TemplateArgs[I].getLocInfo()); | |||
3359 | return CreateParsedType(T, TLB.getTypeSourceInfo(Context, T)); | |||
3360 | } | |||
3361 | ||||
3362 | if (TypeAliasTemplateDecl *TAT = | |||
3363 | dyn_cast_or_null<TypeAliasTemplateDecl>(Template.getAsTemplateDecl())) { | |||
3364 | // C++0x [dcl.type.elab]p2: | |||
3365 | // If the identifier resolves to a typedef-name or the simple-template-id | |||
3366 | // resolves to an alias template specialization, the | |||
3367 | // elaborated-type-specifier is ill-formed. | |||
3368 | Diag(TemplateLoc, diag::err_tag_reference_non_tag) | |||
3369 | << TAT << NTK_TypeAliasTemplate << TagKind; | |||
3370 | Diag(TAT->getLocation(), diag::note_declared_at); | |||
3371 | } | |||
3372 | ||||
3373 | QualType Result = CheckTemplateIdType(Template, TemplateLoc, TemplateArgs); | |||
3374 | if (Result.isNull()) | |||
3375 | return TypeResult(true); | |||
3376 | ||||
3377 | // Check the tag kind | |||
3378 | if (const RecordType *RT = Result->getAs<RecordType>()) { | |||
3379 | RecordDecl *D = RT->getDecl(); | |||
3380 | ||||
3381 | IdentifierInfo *Id = D->getIdentifier(); | |||
3382 | assert(Id && "templated class must have an identifier")(static_cast <bool> (Id && "templated class must have an identifier" ) ? void (0) : __assert_fail ("Id && \"templated class must have an identifier\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 3382, __extension__ __PRETTY_FUNCTION__)); | |||
3383 | ||||
3384 | if (!isAcceptableTagRedeclaration(D, TagKind, TUK == TUK_Definition, | |||
3385 | TagLoc, Id)) { | |||
3386 | Diag(TagLoc, diag::err_use_with_wrong_tag) | |||
3387 | << Result | |||
3388 | << FixItHint::CreateReplacement(SourceRange(TagLoc), D->getKindName()); | |||
3389 | Diag(D->getLocation(), diag::note_previous_use); | |||
3390 | } | |||
3391 | } | |||
3392 | ||||
3393 | // Provide source-location information for the template specialization. | |||
3394 | TypeLocBuilder TLB; | |||
3395 | TemplateSpecializationTypeLoc SpecTL | |||
3396 | = TLB.push<TemplateSpecializationTypeLoc>(Result); | |||
3397 | SpecTL.setTemplateKeywordLoc(TemplateKWLoc); | |||
3398 | SpecTL.setTemplateNameLoc(TemplateLoc); | |||
3399 | SpecTL.setLAngleLoc(LAngleLoc); | |||
3400 | SpecTL.setRAngleLoc(RAngleLoc); | |||
3401 | for (unsigned i = 0, e = SpecTL.getNumArgs(); i != e; ++i) | |||
3402 | SpecTL.setArgLocInfo(i, TemplateArgs[i].getLocInfo()); | |||
3403 | ||||
3404 | // Construct an elaborated type containing the nested-name-specifier (if any) | |||
3405 | // and tag keyword. | |||
3406 | Result = Context.getElaboratedType(Keyword, SS.getScopeRep(), Result); | |||
3407 | ElaboratedTypeLoc ElabTL = TLB.push<ElaboratedTypeLoc>(Result); | |||
3408 | ElabTL.setElaboratedKeywordLoc(TagLoc); | |||
3409 | ElabTL.setQualifierLoc(SS.getWithLocInContext(Context)); | |||
3410 | return CreateParsedType(Result, TLB.getTypeSourceInfo(Context, Result)); | |||
3411 | } | |||
3412 | ||||
3413 | static bool CheckTemplateSpecializationScope(Sema &S, NamedDecl *Specialized, | |||
3414 | NamedDecl *PrevDecl, | |||
3415 | SourceLocation Loc, | |||
3416 | bool IsPartialSpecialization); | |||
3417 | ||||
3418 | static TemplateSpecializationKind getTemplateSpecializationKind(Decl *D); | |||
3419 | ||||
3420 | static bool isTemplateArgumentTemplateParameter( | |||
3421 | const TemplateArgument &Arg, unsigned Depth, unsigned Index) { | |||
3422 | switch (Arg.getKind()) { | |||
3423 | case TemplateArgument::Null: | |||
3424 | case TemplateArgument::NullPtr: | |||
3425 | case TemplateArgument::Integral: | |||
3426 | case TemplateArgument::Declaration: | |||
3427 | case TemplateArgument::Pack: | |||
3428 | case TemplateArgument::TemplateExpansion: | |||
3429 | return false; | |||
3430 | ||||
3431 | case TemplateArgument::Type: { | |||
3432 | QualType Type = Arg.getAsType(); | |||
3433 | const TemplateTypeParmType *TPT = | |||
3434 | Arg.getAsType()->getAs<TemplateTypeParmType>(); | |||
3435 | return TPT && !Type.hasQualifiers() && | |||
3436 | TPT->getDepth() == Depth && TPT->getIndex() == Index; | |||
3437 | } | |||
3438 | ||||
3439 | case TemplateArgument::Expression: { | |||
3440 | DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Arg.getAsExpr()); | |||
3441 | if (!DRE || !DRE->getDecl()) | |||
3442 | return false; | |||
3443 | const NonTypeTemplateParmDecl *NTTP = | |||
3444 | dyn_cast<NonTypeTemplateParmDecl>(DRE->getDecl()); | |||
3445 | return NTTP && NTTP->getDepth() == Depth && NTTP->getIndex() == Index; | |||
3446 | } | |||
3447 | ||||
3448 | case TemplateArgument::Template: | |||
3449 | const TemplateTemplateParmDecl *TTP = | |||
3450 | dyn_cast_or_null<TemplateTemplateParmDecl>( | |||
3451 | Arg.getAsTemplateOrTemplatePattern().getAsTemplateDecl()); | |||
3452 | return TTP && TTP->getDepth() == Depth && TTP->getIndex() == Index; | |||
3453 | } | |||
3454 | llvm_unreachable("unexpected kind of template argument")::llvm::llvm_unreachable_internal("unexpected kind of template argument" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 3454); | |||
3455 | } | |||
3456 | ||||
3457 | static bool isSameAsPrimaryTemplate(TemplateParameterList *Params, | |||
3458 | ArrayRef<TemplateArgument> Args) { | |||
3459 | if (Params->size() != Args.size()) | |||
3460 | return false; | |||
3461 | ||||
3462 | unsigned Depth = Params->getDepth(); | |||
3463 | ||||
3464 | for (unsigned I = 0, N = Args.size(); I != N; ++I) { | |||
3465 | TemplateArgument Arg = Args[I]; | |||
3466 | ||||
3467 | // If the parameter is a pack expansion, the argument must be a pack | |||
3468 | // whose only element is a pack expansion. | |||
3469 | if (Params->getParam(I)->isParameterPack()) { | |||
3470 | if (Arg.getKind() != TemplateArgument::Pack || Arg.pack_size() != 1 || | |||
3471 | !Arg.pack_begin()->isPackExpansion()) | |||
3472 | return false; | |||
3473 | Arg = Arg.pack_begin()->getPackExpansionPattern(); | |||
3474 | } | |||
3475 | ||||
3476 | if (!isTemplateArgumentTemplateParameter(Arg, Depth, I)) | |||
3477 | return false; | |||
3478 | } | |||
3479 | ||||
3480 | return true; | |||
3481 | } | |||
3482 | ||||
3483 | /// Convert the parser's template argument list representation into our form. | |||
3484 | static TemplateArgumentListInfo | |||
3485 | makeTemplateArgumentListInfo(Sema &S, TemplateIdAnnotation &TemplateId) { | |||
3486 | TemplateArgumentListInfo TemplateArgs(TemplateId.LAngleLoc, | |||
3487 | TemplateId.RAngleLoc); | |||
3488 | ASTTemplateArgsPtr TemplateArgsPtr(TemplateId.getTemplateArgs(), | |||
3489 | TemplateId.NumArgs); | |||
3490 | S.translateTemplateArguments(TemplateArgsPtr, TemplateArgs); | |||
3491 | return TemplateArgs; | |||
3492 | } | |||
3493 | ||||
3494 | template<typename PartialSpecDecl> | |||
3495 | static void checkMoreSpecializedThanPrimary(Sema &S, PartialSpecDecl *Partial) { | |||
3496 | if (Partial->getDeclContext()->isDependentContext()) | |||
3497 | return; | |||
3498 | ||||
3499 | // FIXME: Get the TDK from deduction in order to provide better diagnostics | |||
3500 | // for non-substitution-failure issues? | |||
3501 | TemplateDeductionInfo Info(Partial->getLocation()); | |||
3502 | if (S.isMoreSpecializedThanPrimary(Partial, Info)) | |||
3503 | return; | |||
3504 | ||||
3505 | auto *Template = Partial->getSpecializedTemplate(); | |||
3506 | S.Diag(Partial->getLocation(), | |||
3507 | diag::ext_partial_spec_not_more_specialized_than_primary) | |||
3508 | << isa<VarTemplateDecl>(Template); | |||
3509 | ||||
3510 | if (Info.hasSFINAEDiagnostic()) { | |||
3511 | PartialDiagnosticAt Diag = {SourceLocation(), | |||
3512 | PartialDiagnostic::NullDiagnostic()}; | |||
3513 | Info.takeSFINAEDiagnostic(Diag); | |||
3514 | SmallString<128> SFINAEArgString; | |||
3515 | Diag.second.EmitToString(S.getDiagnostics(), SFINAEArgString); | |||
3516 | S.Diag(Diag.first, | |||
3517 | diag::note_partial_spec_not_more_specialized_than_primary) | |||
3518 | << SFINAEArgString; | |||
3519 | } | |||
3520 | ||||
3521 | S.Diag(Template->getLocation(), diag::note_template_decl_here); | |||
3522 | } | |||
3523 | ||||
3524 | static void | |||
3525 | noteNonDeducibleParameters(Sema &S, TemplateParameterList *TemplateParams, | |||
3526 | const llvm::SmallBitVector &DeducibleParams) { | |||
3527 | for (unsigned I = 0, N = DeducibleParams.size(); I != N; ++I) { | |||
3528 | if (!DeducibleParams[I]) { | |||
3529 | NamedDecl *Param = TemplateParams->getParam(I); | |||
3530 | if (Param->getDeclName()) | |||
3531 | S.Diag(Param->getLocation(), diag::note_non_deducible_parameter) | |||
3532 | << Param->getDeclName(); | |||
3533 | else | |||
3534 | S.Diag(Param->getLocation(), diag::note_non_deducible_parameter) | |||
3535 | << "(anonymous)"; | |||
3536 | } | |||
3537 | } | |||
3538 | } | |||
3539 | ||||
3540 | ||||
3541 | template<typename PartialSpecDecl> | |||
3542 | static void checkTemplatePartialSpecialization(Sema &S, | |||
3543 | PartialSpecDecl *Partial) { | |||
3544 | // C++1z [temp.class.spec]p8: (DR1495) | |||
3545 | // - The specialization shall be more specialized than the primary | |||
3546 | // template (14.5.5.2). | |||
3547 | checkMoreSpecializedThanPrimary(S, Partial); | |||
3548 | ||||
3549 | // C++ [temp.class.spec]p8: (DR1315) | |||
3550 | // - Each template-parameter shall appear at least once in the | |||
3551 | // template-id outside a non-deduced context. | |||
3552 | // C++1z [temp.class.spec.match]p3 (P0127R2) | |||
3553 | // If the template arguments of a partial specialization cannot be | |||
3554 | // deduced because of the structure of its template-parameter-list | |||
3555 | // and the template-id, the program is ill-formed. | |||
3556 | auto *TemplateParams = Partial->getTemplateParameters(); | |||
3557 | llvm::SmallBitVector DeducibleParams(TemplateParams->size()); | |||
3558 | S.MarkUsedTemplateParameters(Partial->getTemplateArgs(), true, | |||
3559 | TemplateParams->getDepth(), DeducibleParams); | |||
3560 | ||||
3561 | if (!DeducibleParams.all()) { | |||
3562 | unsigned NumNonDeducible = DeducibleParams.size() - DeducibleParams.count(); | |||
3563 | S.Diag(Partial->getLocation(), diag::ext_partial_specs_not_deducible) | |||
3564 | << isa<VarTemplatePartialSpecializationDecl>(Partial) | |||
3565 | << (NumNonDeducible > 1) | |||
3566 | << SourceRange(Partial->getLocation(), | |||
3567 | Partial->getTemplateArgsAsWritten()->RAngleLoc); | |||
3568 | noteNonDeducibleParameters(S, TemplateParams, DeducibleParams); | |||
3569 | } | |||
3570 | } | |||
3571 | ||||
3572 | void Sema::CheckTemplatePartialSpecialization( | |||
3573 | ClassTemplatePartialSpecializationDecl *Partial) { | |||
3574 | checkTemplatePartialSpecialization(*this, Partial); | |||
3575 | } | |||
3576 | ||||
3577 | void Sema::CheckTemplatePartialSpecialization( | |||
3578 | VarTemplatePartialSpecializationDecl *Partial) { | |||
3579 | checkTemplatePartialSpecialization(*this, Partial); | |||
3580 | } | |||
3581 | ||||
3582 | void Sema::CheckDeductionGuideTemplate(FunctionTemplateDecl *TD) { | |||
3583 | // C++1z [temp.param]p11: | |||
3584 | // A template parameter of a deduction guide template that does not have a | |||
3585 | // default-argument shall be deducible from the parameter-type-list of the | |||
3586 | // deduction guide template. | |||
3587 | auto *TemplateParams = TD->getTemplateParameters(); | |||
3588 | llvm::SmallBitVector DeducibleParams(TemplateParams->size()); | |||
3589 | MarkDeducedTemplateParameters(TD, DeducibleParams); | |||
3590 | for (unsigned I = 0; I != TemplateParams->size(); ++I) { | |||
3591 | // A parameter pack is deducible (to an empty pack). | |||
3592 | auto *Param = TemplateParams->getParam(I); | |||
3593 | if (Param->isParameterPack() || hasVisibleDefaultArgument(Param)) | |||
3594 | DeducibleParams[I] = true; | |||
3595 | } | |||
3596 | ||||
3597 | if (!DeducibleParams.all()) { | |||
3598 | unsigned NumNonDeducible = DeducibleParams.size() - DeducibleParams.count(); | |||
3599 | Diag(TD->getLocation(), diag::err_deduction_guide_template_not_deducible) | |||
3600 | << (NumNonDeducible > 1); | |||
3601 | noteNonDeducibleParameters(*this, TemplateParams, DeducibleParams); | |||
3602 | } | |||
3603 | } | |||
3604 | ||||
3605 | DeclResult Sema::ActOnVarTemplateSpecialization( | |||
3606 | Scope *S, Declarator &D, TypeSourceInfo *DI, SourceLocation TemplateKWLoc, | |||
3607 | TemplateParameterList *TemplateParams, StorageClass SC, | |||
3608 | bool IsPartialSpecialization) { | |||
3609 | // D must be variable template id. | |||
3610 | assert(D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId &&(static_cast <bool> (D.getName().getKind() == UnqualifiedIdKind ::IK_TemplateId && "Variable template specialization is declared with a template it." ) ? void (0) : __assert_fail ("D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId && \"Variable template specialization is declared with a template it.\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 3611, __extension__ __PRETTY_FUNCTION__)) | |||
3611 | "Variable template specialization is declared with a template it.")(static_cast <bool> (D.getName().getKind() == UnqualifiedIdKind ::IK_TemplateId && "Variable template specialization is declared with a template it." ) ? void (0) : __assert_fail ("D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId && \"Variable template specialization is declared with a template it.\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 3611, __extension__ __PRETTY_FUNCTION__)); | |||
3612 | ||||
3613 | TemplateIdAnnotation *TemplateId = D.getName().TemplateId; | |||
3614 | TemplateArgumentListInfo TemplateArgs = | |||
3615 | makeTemplateArgumentListInfo(*this, *TemplateId); | |||
3616 | SourceLocation TemplateNameLoc = D.getIdentifierLoc(); | |||
3617 | SourceLocation LAngleLoc = TemplateId->LAngleLoc; | |||
3618 | SourceLocation RAngleLoc = TemplateId->RAngleLoc; | |||
3619 | ||||
3620 | TemplateName Name = TemplateId->Template.get(); | |||
3621 | ||||
3622 | // The template-id must name a variable template. | |||
3623 | VarTemplateDecl *VarTemplate = | |||
3624 | dyn_cast_or_null<VarTemplateDecl>(Name.getAsTemplateDecl()); | |||
3625 | if (!VarTemplate) { | |||
3626 | NamedDecl *FnTemplate; | |||
3627 | if (auto *OTS = Name.getAsOverloadedTemplate()) | |||
3628 | FnTemplate = *OTS->begin(); | |||
3629 | else | |||
3630 | FnTemplate = dyn_cast_or_null<FunctionTemplateDecl>(Name.getAsTemplateDecl()); | |||
3631 | if (FnTemplate) | |||
3632 | return Diag(D.getIdentifierLoc(), diag::err_var_spec_no_template_but_method) | |||
3633 | << FnTemplate->getDeclName(); | |||
3634 | return Diag(D.getIdentifierLoc(), diag::err_var_spec_no_template) | |||
3635 | << IsPartialSpecialization; | |||
3636 | } | |||
3637 | ||||
3638 | // Check for unexpanded parameter packs in any of the template arguments. | |||
3639 | for (unsigned I = 0, N = TemplateArgs.size(); I != N; ++I) | |||
3640 | if (DiagnoseUnexpandedParameterPack(TemplateArgs[I], | |||
3641 | UPPC_PartialSpecialization)) | |||
3642 | return true; | |||
3643 | ||||
3644 | // Check that the template argument list is well-formed for this | |||
3645 | // template. | |||
3646 | SmallVector<TemplateArgument, 4> Converted; | |||
3647 | if (CheckTemplateArgumentList(VarTemplate, TemplateNameLoc, TemplateArgs, | |||
3648 | false, Converted)) | |||
3649 | return true; | |||
3650 | ||||
3651 | // Find the variable template (partial) specialization declaration that | |||
3652 | // corresponds to these arguments. | |||
3653 | if (IsPartialSpecialization) { | |||
3654 | if (CheckTemplatePartialSpecializationArgs(TemplateNameLoc, VarTemplate, | |||
3655 | TemplateArgs.size(), Converted)) | |||
3656 | return true; | |||
3657 | ||||
3658 | // FIXME: Move these checks to CheckTemplatePartialSpecializationArgs so we | |||
3659 | // also do them during instantiation. | |||
3660 | bool InstantiationDependent; | |||
3661 | if (!Name.isDependent() && | |||
3662 | !TemplateSpecializationType::anyDependentTemplateArguments( | |||
3663 | TemplateArgs.arguments(), | |||
3664 | InstantiationDependent)) { | |||
3665 | Diag(TemplateNameLoc, diag::err_partial_spec_fully_specialized) | |||
3666 | << VarTemplate->getDeclName(); | |||
3667 | IsPartialSpecialization = false; | |||
3668 | } | |||
3669 | ||||
3670 | if (isSameAsPrimaryTemplate(VarTemplate->getTemplateParameters(), | |||
3671 | Converted)) { | |||
3672 | // C++ [temp.class.spec]p9b3: | |||
3673 | // | |||
3674 | // -- The argument list of the specialization shall not be identical | |||
3675 | // to the implicit argument list of the primary template. | |||
3676 | Diag(TemplateNameLoc, diag::err_partial_spec_args_match_primary_template) | |||
3677 | << /*variable template*/ 1 | |||
3678 | << /*is definition*/(SC != SC_Extern && !CurContext->isRecord()) | |||
3679 | << FixItHint::CreateRemoval(SourceRange(LAngleLoc, RAngleLoc)); | |||
3680 | // FIXME: Recover from this by treating the declaration as a redeclaration | |||
3681 | // of the primary template. | |||
3682 | return true; | |||
3683 | } | |||
3684 | } | |||
3685 | ||||
3686 | void *InsertPos = nullptr; | |||
3687 | VarTemplateSpecializationDecl *PrevDecl = nullptr; | |||
3688 | ||||
3689 | if (IsPartialSpecialization) | |||
3690 | // FIXME: Template parameter list matters too | |||
3691 | PrevDecl = VarTemplate->findPartialSpecialization(Converted, InsertPos); | |||
3692 | else | |||
3693 | PrevDecl = VarTemplate->findSpecialization(Converted, InsertPos); | |||
3694 | ||||
3695 | VarTemplateSpecializationDecl *Specialization = nullptr; | |||
3696 | ||||
3697 | // Check whether we can declare a variable template specialization in | |||
3698 | // the current scope. | |||
3699 | if (CheckTemplateSpecializationScope(*this, VarTemplate, PrevDecl, | |||
3700 | TemplateNameLoc, | |||
3701 | IsPartialSpecialization)) | |||
3702 | return true; | |||
3703 | ||||
3704 | if (PrevDecl && PrevDecl->getSpecializationKind() == TSK_Undeclared) { | |||
3705 | // Since the only prior variable template specialization with these | |||
3706 | // arguments was referenced but not declared, reuse that | |||
3707 | // declaration node as our own, updating its source location and | |||
3708 | // the list of outer template parameters to reflect our new declaration. | |||
3709 | Specialization = PrevDecl; | |||
3710 | Specialization->setLocation(TemplateNameLoc); | |||
3711 | PrevDecl = nullptr; | |||
3712 | } else if (IsPartialSpecialization) { | |||
3713 | // Create a new class template partial specialization declaration node. | |||
3714 | VarTemplatePartialSpecializationDecl *PrevPartial = | |||
3715 | cast_or_null<VarTemplatePartialSpecializationDecl>(PrevDecl); | |||
3716 | VarTemplatePartialSpecializationDecl *Partial = | |||
3717 | VarTemplatePartialSpecializationDecl::Create( | |||
3718 | Context, VarTemplate->getDeclContext(), TemplateKWLoc, | |||
3719 | TemplateNameLoc, TemplateParams, VarTemplate, DI->getType(), DI, SC, | |||
3720 | Converted, TemplateArgs); | |||
3721 | ||||
3722 | if (!PrevPartial) | |||
3723 | VarTemplate->AddPartialSpecialization(Partial, InsertPos); | |||
3724 | Specialization = Partial; | |||
3725 | ||||
3726 | // If we are providing an explicit specialization of a member variable | |||
3727 | // template specialization, make a note of that. | |||
3728 | if (PrevPartial && PrevPartial->getInstantiatedFromMember()) | |||
3729 | PrevPartial->setMemberSpecialization(); | |||
3730 | ||||
3731 | CheckTemplatePartialSpecialization(Partial); | |||
3732 | } else { | |||
3733 | // Create a new class template specialization declaration node for | |||
3734 | // this explicit specialization or friend declaration. | |||
3735 | Specialization = VarTemplateSpecializationDecl::Create( | |||
3736 | Context, VarTemplate->getDeclContext(), TemplateKWLoc, TemplateNameLoc, | |||
3737 | VarTemplate, DI->getType(), DI, SC, Converted); | |||
3738 | Specialization->setTemplateArgsInfo(TemplateArgs); | |||
3739 | ||||
3740 | if (!PrevDecl) | |||
3741 | VarTemplate->AddSpecialization(Specialization, InsertPos); | |||
3742 | } | |||
3743 | ||||
3744 | // C++ [temp.expl.spec]p6: | |||
3745 | // If a template, a member template or the member of a class template is | |||
3746 | // explicitly specialized then that specialization shall be declared | |||
3747 | // before the first use of that specialization that would cause an implicit | |||
3748 | // instantiation to take place, in every translation unit in which such a | |||
3749 | // use occurs; no diagnostic is required. | |||
3750 | if (PrevDecl && PrevDecl->getPointOfInstantiation().isValid()) { | |||
3751 | bool Okay = false; | |||
3752 | for (Decl *Prev = PrevDecl; Prev; Prev = Prev->getPreviousDecl()) { | |||
3753 | // Is there any previous explicit specialization declaration? | |||
3754 | if (getTemplateSpecializationKind(Prev) == TSK_ExplicitSpecialization) { | |||
3755 | Okay = true; | |||
3756 | break; | |||
3757 | } | |||
3758 | } | |||
3759 | ||||
3760 | if (!Okay) { | |||
3761 | SourceRange Range(TemplateNameLoc, RAngleLoc); | |||
3762 | Diag(TemplateNameLoc, diag::err_specialization_after_instantiation) | |||
3763 | << Name << Range; | |||
3764 | ||||
3765 | Diag(PrevDecl->getPointOfInstantiation(), | |||
3766 | diag::note_instantiation_required_here) | |||
3767 | << (PrevDecl->getTemplateSpecializationKind() != | |||
3768 | TSK_ImplicitInstantiation); | |||
3769 | return true; | |||
3770 | } | |||
3771 | } | |||
3772 | ||||
3773 | Specialization->setTemplateKeywordLoc(TemplateKWLoc); | |||
3774 | Specialization->setLexicalDeclContext(CurContext); | |||
3775 | ||||
3776 | // Add the specialization into its lexical context, so that it can | |||
3777 | // be seen when iterating through the list of declarations in that | |||
3778 | // context. However, specializations are not found by name lookup. | |||
3779 | CurContext->addDecl(Specialization); | |||
3780 | ||||
3781 | // Note that this is an explicit specialization. | |||
3782 | Specialization->setSpecializationKind(TSK_ExplicitSpecialization); | |||
3783 | ||||
3784 | if (PrevDecl) { | |||
3785 | // Check that this isn't a redefinition of this specialization, | |||
3786 | // merging with previous declarations. | |||
3787 | LookupResult PrevSpec(*this, GetNameForDeclarator(D), LookupOrdinaryName, | |||
3788 | forRedeclarationInCurContext()); | |||
3789 | PrevSpec.addDecl(PrevDecl); | |||
3790 | D.setRedeclaration(CheckVariableDeclaration(Specialization, PrevSpec)); | |||
3791 | } else if (Specialization->isStaticDataMember() && | |||
3792 | Specialization->isOutOfLine()) { | |||
3793 | Specialization->setAccess(VarTemplate->getAccess()); | |||
3794 | } | |||
3795 | ||||
3796 | // Link instantiations of static data members back to the template from | |||
3797 | // which they were instantiated. | |||
3798 | if (Specialization->isStaticDataMember()) | |||
3799 | Specialization->setInstantiationOfStaticDataMember( | |||
3800 | VarTemplate->getTemplatedDecl(), | |||
3801 | Specialization->getSpecializationKind()); | |||
3802 | ||||
3803 | return Specialization; | |||
3804 | } | |||
3805 | ||||
3806 | namespace { | |||
3807 | /// \brief A partial specialization whose template arguments have matched | |||
3808 | /// a given template-id. | |||
3809 | struct PartialSpecMatchResult { | |||
3810 | VarTemplatePartialSpecializationDecl *Partial; | |||
3811 | TemplateArgumentList *Args; | |||
3812 | }; | |||
3813 | } // end anonymous namespace | |||
3814 | ||||
3815 | DeclResult | |||
3816 | Sema::CheckVarTemplateId(VarTemplateDecl *Template, SourceLocation TemplateLoc, | |||
3817 | SourceLocation TemplateNameLoc, | |||
3818 | const TemplateArgumentListInfo &TemplateArgs) { | |||
3819 | assert(Template && "A variable template id without template?")(static_cast <bool> (Template && "A variable template id without template?" ) ? void (0) : __assert_fail ("Template && \"A variable template id without template?\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 3819, __extension__ __PRETTY_FUNCTION__)); | |||
3820 | ||||
3821 | // Check that the template argument list is well-formed for this template. | |||
3822 | SmallVector<TemplateArgument, 4> Converted; | |||
3823 | if (CheckTemplateArgumentList( | |||
3824 | Template, TemplateNameLoc, | |||
3825 | const_cast<TemplateArgumentListInfo &>(TemplateArgs), false, | |||
3826 | Converted)) | |||
3827 | return true; | |||
3828 | ||||
3829 | // Find the variable template specialization declaration that | |||
3830 | // corresponds to these arguments. | |||
3831 | void *InsertPos = nullptr; | |||
3832 | if (VarTemplateSpecializationDecl *Spec = Template->findSpecialization( | |||
3833 | Converted, InsertPos)) { | |||
3834 | checkSpecializationVisibility(TemplateNameLoc, Spec); | |||
3835 | // If we already have a variable template specialization, return it. | |||
3836 | return Spec; | |||
3837 | } | |||
3838 | ||||
3839 | // This is the first time we have referenced this variable template | |||
3840 | // specialization. Create the canonical declaration and add it to | |||
3841 | // the set of specializations, based on the closest partial specialization | |||
3842 | // that it represents. That is, | |||
3843 | VarDecl *InstantiationPattern = Template->getTemplatedDecl(); | |||
3844 | TemplateArgumentList TemplateArgList(TemplateArgumentList::OnStack, | |||
3845 | Converted); | |||
3846 | TemplateArgumentList *InstantiationArgs = &TemplateArgList; | |||
3847 | bool AmbiguousPartialSpec = false; | |||
3848 | typedef PartialSpecMatchResult MatchResult; | |||
3849 | SmallVector<MatchResult, 4> Matched; | |||
3850 | SourceLocation PointOfInstantiation = TemplateNameLoc; | |||
3851 | TemplateSpecCandidateSet FailedCandidates(PointOfInstantiation, | |||
3852 | /*ForTakingAddress=*/false); | |||
3853 | ||||
3854 | // 1. Attempt to find the closest partial specialization that this | |||
3855 | // specializes, if any. | |||
3856 | // If any of the template arguments is dependent, then this is probably | |||
3857 | // a placeholder for an incomplete declarative context; which must be | |||
3858 | // complete by instantiation time. Thus, do not search through the partial | |||
3859 | // specializations yet. | |||
3860 | // TODO: Unify with InstantiateClassTemplateSpecialization()? | |||
3861 | // Perhaps better after unification of DeduceTemplateArguments() and | |||
3862 | // getMoreSpecializedPartialSpecialization(). | |||
3863 | bool InstantiationDependent = false; | |||
3864 | if (!TemplateSpecializationType::anyDependentTemplateArguments( | |||
3865 | TemplateArgs, InstantiationDependent)) { | |||
3866 | ||||
3867 | SmallVector<VarTemplatePartialSpecializationDecl *, 4> PartialSpecs; | |||
3868 | Template->getPartialSpecializations(PartialSpecs); | |||
3869 | ||||
3870 | for (unsigned I = 0, N = PartialSpecs.size(); I != N; ++I) { | |||
3871 | VarTemplatePartialSpecializationDecl *Partial = PartialSpecs[I]; | |||
3872 | TemplateDeductionInfo Info(FailedCandidates.getLocation()); | |||
3873 | ||||
3874 | if (TemplateDeductionResult Result = | |||
3875 | DeduceTemplateArguments(Partial, TemplateArgList, Info)) { | |||
3876 | // Store the failed-deduction information for use in diagnostics, later. | |||
3877 | // TODO: Actually use the failed-deduction info? | |||
3878 | FailedCandidates.addCandidate().set( | |||
3879 | DeclAccessPair::make(Template, AS_public), Partial, | |||
3880 | MakeDeductionFailureInfo(Context, Result, Info)); | |||
3881 | (void)Result; | |||
3882 | } else { | |||
3883 | Matched.push_back(PartialSpecMatchResult()); | |||
3884 | Matched.back().Partial = Partial; | |||
3885 | Matched.back().Args = Info.take(); | |||
3886 | } | |||
3887 | } | |||
3888 | ||||
3889 | if (Matched.size() >= 1) { | |||
3890 | SmallVector<MatchResult, 4>::iterator Best = Matched.begin(); | |||
3891 | if (Matched.size() == 1) { | |||
3892 | // -- If exactly one matching specialization is found, the | |||
3893 | // instantiation is generated from that specialization. | |||
3894 | // We don't need to do anything for this. | |||
3895 | } else { | |||
3896 | // -- If more than one matching specialization is found, the | |||
3897 | // partial order rules (14.5.4.2) are used to determine | |||
3898 | // whether one of the specializations is more specialized | |||
3899 | // than the others. If none of the specializations is more | |||
3900 | // specialized than all of the other matching | |||
3901 | // specializations, then the use of the variable template is | |||
3902 | // ambiguous and the program is ill-formed. | |||
3903 | for (SmallVector<MatchResult, 4>::iterator P = Best + 1, | |||
3904 | PEnd = Matched.end(); | |||
3905 | P != PEnd; ++P) { | |||
3906 | if (getMoreSpecializedPartialSpecialization(P->Partial, Best->Partial, | |||
3907 | PointOfInstantiation) == | |||
3908 | P->Partial) | |||
3909 | Best = P; | |||
3910 | } | |||
3911 | ||||
3912 | // Determine if the best partial specialization is more specialized than | |||
3913 | // the others. | |||
3914 | for (SmallVector<MatchResult, 4>::iterator P = Matched.begin(), | |||
3915 | PEnd = Matched.end(); | |||
3916 | P != PEnd; ++P) { | |||
3917 | if (P != Best && getMoreSpecializedPartialSpecialization( | |||
3918 | P->Partial, Best->Partial, | |||
3919 | PointOfInstantiation) != Best->Partial) { | |||
3920 | AmbiguousPartialSpec = true; | |||
3921 | break; | |||
3922 | } | |||
3923 | } | |||
3924 | } | |||
3925 | ||||
3926 | // Instantiate using the best variable template partial specialization. | |||
3927 | InstantiationPattern = Best->Partial; | |||
3928 | InstantiationArgs = Best->Args; | |||
3929 | } else { | |||
3930 | // -- If no match is found, the instantiation is generated | |||
3931 | // from the primary template. | |||
3932 | // InstantiationPattern = Template->getTemplatedDecl(); | |||
3933 | } | |||
3934 | } | |||
3935 | ||||
3936 | // 2. Create the canonical declaration. | |||
3937 | // Note that we do not instantiate a definition until we see an odr-use | |||
3938 | // in DoMarkVarDeclReferenced(). | |||
3939 | // FIXME: LateAttrs et al.? | |||
3940 | VarTemplateSpecializationDecl *Decl = BuildVarTemplateInstantiation( | |||
3941 | Template, InstantiationPattern, *InstantiationArgs, TemplateArgs, | |||
3942 | Converted, TemplateNameLoc, InsertPos /*, LateAttrs, StartingScope*/); | |||
3943 | if (!Decl) | |||
3944 | return true; | |||
3945 | ||||
3946 | if (AmbiguousPartialSpec) { | |||
3947 | // Partial ordering did not produce a clear winner. Complain. | |||
3948 | Decl->setInvalidDecl(); | |||
3949 | Diag(PointOfInstantiation, diag::err_partial_spec_ordering_ambiguous) | |||
3950 | << Decl; | |||
3951 | ||||
3952 | // Print the matching partial specializations. | |||
3953 | for (MatchResult P : Matched) | |||
3954 | Diag(P.Partial->getLocation(), diag::note_partial_spec_match) | |||
3955 | << getTemplateArgumentBindingsText(P.Partial->getTemplateParameters(), | |||
3956 | *P.Args); | |||
3957 | return true; | |||
3958 | } | |||
3959 | ||||
3960 | if (VarTemplatePartialSpecializationDecl *D = | |||
3961 | dyn_cast<VarTemplatePartialSpecializationDecl>(InstantiationPattern)) | |||
3962 | Decl->setInstantiationOf(D, InstantiationArgs); | |||
3963 | ||||
3964 | checkSpecializationVisibility(TemplateNameLoc, Decl); | |||
3965 | ||||
3966 | assert(Decl && "No variable template specialization?")(static_cast <bool> (Decl && "No variable template specialization?" ) ? void (0) : __assert_fail ("Decl && \"No variable template specialization?\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 3966, __extension__ __PRETTY_FUNCTION__)); | |||
3967 | return Decl; | |||
3968 | } | |||
3969 | ||||
3970 | ExprResult | |||
3971 | Sema::CheckVarTemplateId(const CXXScopeSpec &SS, | |||
3972 | const DeclarationNameInfo &NameInfo, | |||
3973 | VarTemplateDecl *Template, SourceLocation TemplateLoc, | |||
3974 | const TemplateArgumentListInfo *TemplateArgs) { | |||
3975 | ||||
3976 | DeclResult Decl = CheckVarTemplateId(Template, TemplateLoc, NameInfo.getLoc(), | |||
3977 | *TemplateArgs); | |||
3978 | if (Decl.isInvalid()) | |||
3979 | return ExprError(); | |||
3980 | ||||
3981 | VarDecl *Var = cast<VarDecl>(Decl.get()); | |||
3982 | if (!Var->getTemplateSpecializationKind()) | |||
3983 | Var->setTemplateSpecializationKind(TSK_ImplicitInstantiation, | |||
3984 | NameInfo.getLoc()); | |||
3985 | ||||
3986 | // Build an ordinary singleton decl ref. | |||
3987 | return BuildDeclarationNameExpr(SS, NameInfo, Var, | |||
3988 | /*FoundD=*/nullptr, TemplateArgs); | |||
3989 | } | |||
3990 | ||||
3991 | ExprResult Sema::BuildTemplateIdExpr(const CXXScopeSpec &SS, | |||
3992 | SourceLocation TemplateKWLoc, | |||
3993 | LookupResult &R, | |||
3994 | bool RequiresADL, | |||
3995 | const TemplateArgumentListInfo *TemplateArgs) { | |||
3996 | // FIXME: Can we do any checking at this point? I guess we could check the | |||
3997 | // template arguments that we have against the template name, if the template | |||
3998 | // name refers to a single template. That's not a terribly common case, | |||
3999 | // though. | |||
4000 | // foo<int> could identify a single function unambiguously | |||
4001 | // This approach does NOT work, since f<int>(1); | |||
4002 | // gets resolved prior to resorting to overload resolution | |||
4003 | // i.e., template<class T> void f(double); | |||
4004 | // vs template<class T, class U> void f(U); | |||
4005 | ||||
4006 | // These should be filtered out by our callers. | |||
4007 | assert(!R.empty() && "empty lookup results when building templateid")(static_cast <bool> (!R.empty() && "empty lookup results when building templateid" ) ? void (0) : __assert_fail ("!R.empty() && \"empty lookup results when building templateid\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 4007, __extension__ __PRETTY_FUNCTION__)); | |||
4008 | assert(!R.isAmbiguous() && "ambiguous lookup when building templateid")(static_cast <bool> (!R.isAmbiguous() && "ambiguous lookup when building templateid" ) ? void (0) : __assert_fail ("!R.isAmbiguous() && \"ambiguous lookup when building templateid\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 4008, __extension__ __PRETTY_FUNCTION__)); | |||
4009 | ||||
4010 | // In C++1y, check variable template ids. | |||
4011 | bool InstantiationDependent; | |||
4012 | if (R.getAsSingle<VarTemplateDecl>() && | |||
4013 | !TemplateSpecializationType::anyDependentTemplateArguments( | |||
4014 | *TemplateArgs, InstantiationDependent)) { | |||
4015 | return CheckVarTemplateId(SS, R.getLookupNameInfo(), | |||
4016 | R.getAsSingle<VarTemplateDecl>(), | |||
4017 | TemplateKWLoc, TemplateArgs); | |||
4018 | } | |||
4019 | ||||
4020 | // We don't want lookup warnings at this point. | |||
4021 | R.suppressDiagnostics(); | |||
4022 | ||||
4023 | UnresolvedLookupExpr *ULE | |||
4024 | = UnresolvedLookupExpr::Create(Context, R.getNamingClass(), | |||
4025 | SS.getWithLocInContext(Context), | |||
4026 | TemplateKWLoc, | |||
4027 | R.getLookupNameInfo(), | |||
4028 | RequiresADL, TemplateArgs, | |||
4029 | R.begin(), R.end()); | |||
4030 | ||||
4031 | return ULE; | |||
4032 | } | |||
4033 | ||||
4034 | // We actually only call this from template instantiation. | |||
4035 | ExprResult | |||
4036 | Sema::BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, | |||
4037 | SourceLocation TemplateKWLoc, | |||
4038 | const DeclarationNameInfo &NameInfo, | |||
4039 | const TemplateArgumentListInfo *TemplateArgs) { | |||
4040 | ||||
4041 | assert(TemplateArgs || TemplateKWLoc.isValid())(static_cast <bool> (TemplateArgs || TemplateKWLoc.isValid ()) ? void (0) : __assert_fail ("TemplateArgs || TemplateKWLoc.isValid()" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 4041, __extension__ __PRETTY_FUNCTION__)); | |||
4042 | DeclContext *DC; | |||
4043 | if (!(DC = computeDeclContext(SS, false)) || | |||
4044 | DC->isDependentContext() || | |||
4045 | RequireCompleteDeclContext(SS, DC)) | |||
4046 | return BuildDependentDeclRefExpr(SS, TemplateKWLoc, NameInfo, TemplateArgs); | |||
4047 | ||||
4048 | bool MemberOfUnknownSpecialization; | |||
4049 | LookupResult R(*this, NameInfo, LookupOrdinaryName); | |||
4050 | LookupTemplateName(R, (Scope*)nullptr, SS, QualType(), /*Entering*/ false, | |||
4051 | MemberOfUnknownSpecialization); | |||
4052 | ||||
4053 | if (R.isAmbiguous()) | |||
4054 | return ExprError(); | |||
4055 | ||||
4056 | if (R.empty()) { | |||
4057 | Diag(NameInfo.getLoc(), diag::err_template_kw_refers_to_non_template) | |||
4058 | << NameInfo.getName() << SS.getRange(); | |||
4059 | return ExprError(); | |||
4060 | } | |||
4061 | ||||
4062 | if (ClassTemplateDecl *Temp = R.getAsSingle<ClassTemplateDecl>()) { | |||
4063 | Diag(NameInfo.getLoc(), diag::err_template_kw_refers_to_class_template) | |||
4064 | << SS.getScopeRep() | |||
4065 | << NameInfo.getName().getAsString() << SS.getRange(); | |||
4066 | Diag(Temp->getLocation(), diag::note_referenced_class_template); | |||
4067 | return ExprError(); | |||
4068 | } | |||
4069 | ||||
4070 | return BuildTemplateIdExpr(SS, TemplateKWLoc, R, /*ADL*/ false, TemplateArgs); | |||
4071 | } | |||
4072 | ||||
4073 | /// \brief Form a dependent template name. | |||
4074 | /// | |||
4075 | /// This action forms a dependent template name given the template | |||
4076 | /// name and its (presumably dependent) scope specifier. For | |||
4077 | /// example, given "MetaFun::template apply", the scope specifier \p | |||
4078 | /// SS will be "MetaFun::", \p TemplateKWLoc contains the location | |||
4079 | /// of the "template" keyword, and "apply" is the \p Name. | |||
4080 | TemplateNameKind Sema::ActOnDependentTemplateName(Scope *S, | |||
4081 | CXXScopeSpec &SS, | |||
4082 | SourceLocation TemplateKWLoc, | |||
4083 | UnqualifiedId &Name, | |||
4084 | ParsedType ObjectType, | |||
4085 | bool EnteringContext, | |||
4086 | TemplateTy &Result, | |||
4087 | bool AllowInjectedClassName) { | |||
4088 | if (TemplateKWLoc.isValid() && S && !S->getTemplateParamParent()) | |||
4089 | Diag(TemplateKWLoc, | |||
4090 | getLangOpts().CPlusPlus11 ? | |||
4091 | diag::warn_cxx98_compat_template_outside_of_template : | |||
4092 | diag::ext_template_outside_of_template) | |||
4093 | << FixItHint::CreateRemoval(TemplateKWLoc); | |||
4094 | ||||
4095 | DeclContext *LookupCtx = nullptr; | |||
4096 | if (SS.isSet()) | |||
4097 | LookupCtx = computeDeclContext(SS, EnteringContext); | |||
4098 | if (!LookupCtx && ObjectType) | |||
4099 | LookupCtx = computeDeclContext(ObjectType.get()); | |||
4100 | if (LookupCtx) { | |||
4101 | // C++0x [temp.names]p5: | |||
4102 | // If a name prefixed by the keyword template is not the name of | |||
4103 | // a template, the program is ill-formed. [Note: the keyword | |||
4104 | // template may not be applied to non-template members of class | |||
4105 | // templates. -end note ] [ Note: as is the case with the | |||
4106 | // typename prefix, the template prefix is allowed in cases | |||
4107 | // where it is not strictly necessary; i.e., when the | |||
4108 | // nested-name-specifier or the expression on the left of the -> | |||
4109 | // or . is not dependent on a template-parameter, or the use | |||
4110 | // does not appear in the scope of a template. -end note] | |||
4111 | // | |||
4112 | // Note: C++03 was more strict here, because it banned the use of | |||
4113 | // the "template" keyword prior to a template-name that was not a | |||
4114 | // dependent name. C++ DR468 relaxed this requirement (the | |||
4115 | // "template" keyword is now permitted). We follow the C++0x | |||
4116 | // rules, even in C++03 mode with a warning, retroactively applying the DR. | |||
4117 | bool MemberOfUnknownSpecialization; | |||
4118 | TemplateNameKind TNK = isTemplateName(S, SS, TemplateKWLoc.isValid(), Name, | |||
4119 | ObjectType, EnteringContext, Result, | |||
4120 | MemberOfUnknownSpecialization); | |||
4121 | if (TNK == TNK_Non_template && LookupCtx->isDependentContext() && | |||
4122 | isa<CXXRecordDecl>(LookupCtx) && | |||
4123 | (!cast<CXXRecordDecl>(LookupCtx)->hasDefinition() || | |||
4124 | cast<CXXRecordDecl>(LookupCtx)->hasAnyDependentBases())) { | |||
4125 | // This is a dependent template. Handle it below. | |||
4126 | } else if (TNK == TNK_Non_template) { | |||
4127 | Diag(Name.getLocStart(), | |||
4128 | diag::err_template_kw_refers_to_non_template) | |||
4129 | << GetNameFromUnqualifiedId(Name).getName() | |||
4130 | << Name.getSourceRange() | |||
4131 | << TemplateKWLoc; | |||
4132 | return TNK_Non_template; | |||
4133 | } else { | |||
4134 | // We found something; return it. | |||
4135 | auto *LookupRD = dyn_cast<CXXRecordDecl>(LookupCtx); | |||
4136 | if (!AllowInjectedClassName && SS.isSet() && LookupRD && | |||
4137 | Name.getKind() == UnqualifiedIdKind::IK_Identifier && | |||
4138 | Name.Identifier && LookupRD->getIdentifier() == Name.Identifier) { | |||
4139 | // C++14 [class.qual]p2: | |||
4140 | // In a lookup in which function names are not ignored and the | |||
4141 | // nested-name-specifier nominates a class C, if the name specified | |||
4142 | // [...] is the injected-class-name of C, [...] the name is instead | |||
4143 | // considered to name the constructor | |||
4144 | // | |||
4145 | // We don't get here if naming the constructor would be valid, so we | |||
4146 | // just reject immediately and recover by treating the | |||
4147 | // injected-class-name as naming the template. | |||
4148 | Diag(Name.getLocStart(), | |||
4149 | diag::ext_out_of_line_qualified_id_type_names_constructor) | |||
4150 | << Name.Identifier << 0 /*injected-class-name used as template name*/ | |||
4151 | << 1 /*'template' keyword was used*/; | |||
4152 | } | |||
4153 | return TNK; | |||
4154 | } | |||
4155 | } | |||
4156 | ||||
4157 | NestedNameSpecifier *Qualifier = SS.getScopeRep(); | |||
4158 | ||||
4159 | switch (Name.getKind()) { | |||
4160 | case UnqualifiedIdKind::IK_Identifier: | |||
4161 | Result = TemplateTy::make(Context.getDependentTemplateName(Qualifier, | |||
4162 | Name.Identifier)); | |||
4163 | return TNK_Dependent_template_name; | |||
4164 | ||||
4165 | case UnqualifiedIdKind::IK_OperatorFunctionId: | |||
4166 | Result = TemplateTy::make(Context.getDependentTemplateName(Qualifier, | |||
4167 | Name.OperatorFunctionId.Operator)); | |||
4168 | return TNK_Function_template; | |||
4169 | ||||
4170 | case UnqualifiedIdKind::IK_LiteralOperatorId: | |||
4171 | 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-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 4171); | |||
4172 | ||||
4173 | default: | |||
4174 | break; | |||
4175 | } | |||
4176 | ||||
4177 | Diag(Name.getLocStart(), | |||
4178 | diag::err_template_kw_refers_to_non_template) | |||
4179 | << GetNameFromUnqualifiedId(Name).getName() | |||
4180 | << Name.getSourceRange() | |||
4181 | << TemplateKWLoc; | |||
4182 | return TNK_Non_template; | |||
4183 | } | |||
4184 | ||||
4185 | bool Sema::CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, | |||
4186 | TemplateArgumentLoc &AL, | |||
4187 | SmallVectorImpl<TemplateArgument> &Converted) { | |||
4188 | const TemplateArgument &Arg = AL.getArgument(); | |||
4189 | QualType ArgType; | |||
4190 | TypeSourceInfo *TSI = nullptr; | |||
4191 | ||||
4192 | // Check template type parameter. | |||
4193 | switch(Arg.getKind()) { | |||
4194 | case TemplateArgument::Type: | |||
4195 | // C++ [temp.arg.type]p1: | |||
4196 | // A template-argument for a template-parameter which is a | |||
4197 | // type shall be a type-id. | |||
4198 | ArgType = Arg.getAsType(); | |||
4199 | TSI = AL.getTypeSourceInfo(); | |||
4200 | break; | |||
4201 | case TemplateArgument::Template: | |||
4202 | case TemplateArgument::TemplateExpansion: { | |||
4203 | // We have a template type parameter but the template argument | |||
4204 | // is a template without any arguments. | |||
4205 | SourceRange SR = AL.getSourceRange(); | |||
4206 | TemplateName Name = Arg.getAsTemplateOrTemplatePattern(); | |||
4207 | Diag(SR.getBegin(), diag::err_template_missing_args) | |||
4208 | << (int)getTemplateNameKindForDiagnostics(Name) << Name << SR; | |||
4209 | if (TemplateDecl *Decl = Name.getAsTemplateDecl()) | |||
4210 | Diag(Decl->getLocation(), diag::note_template_decl_here); | |||
4211 | ||||
4212 | return true; | |||
4213 | } | |||
4214 | case TemplateArgument::Expression: { | |||
4215 | // We have a template type parameter but the template argument is an | |||
4216 | // expression; see if maybe it is missing the "typename" keyword. | |||
4217 | CXXScopeSpec SS; | |||
4218 | DeclarationNameInfo NameInfo; | |||
4219 | ||||
4220 | if (DeclRefExpr *ArgExpr = dyn_cast<DeclRefExpr>(Arg.getAsExpr())) { | |||
4221 | SS.Adopt(ArgExpr->getQualifierLoc()); | |||
4222 | NameInfo = ArgExpr->getNameInfo(); | |||
4223 | } else if (DependentScopeDeclRefExpr *ArgExpr = | |||
4224 | dyn_cast<DependentScopeDeclRefExpr>(Arg.getAsExpr())) { | |||
4225 | SS.Adopt(ArgExpr->getQualifierLoc()); | |||
4226 | NameInfo = ArgExpr->getNameInfo(); | |||
4227 | } else if (CXXDependentScopeMemberExpr *ArgExpr = | |||
4228 | dyn_cast<CXXDependentScopeMemberExpr>(Arg.getAsExpr())) { | |||
4229 | if (ArgExpr->isImplicitAccess()) { | |||
4230 | SS.Adopt(ArgExpr->getQualifierLoc()); | |||
4231 | NameInfo = ArgExpr->getMemberNameInfo(); | |||
4232 | } | |||
4233 | } | |||
4234 | ||||
4235 | if (auto *II = NameInfo.getName().getAsIdentifierInfo()) { | |||
4236 | LookupResult Result(*this, NameInfo, LookupOrdinaryName); | |||
4237 | LookupParsedName(Result, CurScope, &SS); | |||
4238 | ||||
4239 | if (Result.getAsSingle<TypeDecl>() || | |||
4240 | Result.getResultKind() == | |||
4241 | LookupResult::NotFoundInCurrentInstantiation) { | |||
4242 | // Suggest that the user add 'typename' before the NNS. | |||
4243 | SourceLocation Loc = AL.getSourceRange().getBegin(); | |||
4244 | Diag(Loc, getLangOpts().MSVCCompat | |||
4245 | ? diag::ext_ms_template_type_arg_missing_typename | |||
4246 | : diag::err_template_arg_must_be_type_suggest) | |||
4247 | << FixItHint::CreateInsertion(Loc, "typename "); | |||
4248 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
4249 | ||||
4250 | // Recover by synthesizing a type using the location information that we | |||
4251 | // already have. | |||
4252 | ArgType = | |||
4253 | Context.getDependentNameType(ETK_Typename, SS.getScopeRep(), II); | |||
4254 | TypeLocBuilder TLB; | |||
4255 | DependentNameTypeLoc TL = TLB.push<DependentNameTypeLoc>(ArgType); | |||
4256 | TL.setElaboratedKeywordLoc(SourceLocation(/*synthesized*/)); | |||
4257 | TL.setQualifierLoc(SS.getWithLocInContext(Context)); | |||
4258 | TL.setNameLoc(NameInfo.getLoc()); | |||
4259 | TSI = TLB.getTypeSourceInfo(Context, ArgType); | |||
4260 | ||||
4261 | // Overwrite our input TemplateArgumentLoc so that we can recover | |||
4262 | // properly. | |||
4263 | AL = TemplateArgumentLoc(TemplateArgument(ArgType), | |||
4264 | TemplateArgumentLocInfo(TSI)); | |||
4265 | ||||
4266 | break; | |||
4267 | } | |||
4268 | } | |||
4269 | // fallthrough | |||
4270 | LLVM_FALLTHROUGH[[clang::fallthrough]]; | |||
4271 | } | |||
4272 | default: { | |||
4273 | // We have a template type parameter but the template argument | |||
4274 | // is not a type. | |||
4275 | SourceRange SR = AL.getSourceRange(); | |||
4276 | Diag(SR.getBegin(), diag::err_template_arg_must_be_type) << SR; | |||
4277 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
4278 | ||||
4279 | return true; | |||
4280 | } | |||
4281 | } | |||
4282 | ||||
4283 | if (CheckTemplateArgument(Param, TSI)) | |||
4284 | return true; | |||
4285 | ||||
4286 | // Add the converted template type argument. | |||
4287 | ArgType = Context.getCanonicalType(ArgType); | |||
4288 | ||||
4289 | // Objective-C ARC: | |||
4290 | // If an explicitly-specified template argument type is a lifetime type | |||
4291 | // with no lifetime qualifier, the __strong lifetime qualifier is inferred. | |||
4292 | if (getLangOpts().ObjCAutoRefCount && | |||
4293 | ArgType->isObjCLifetimeType() && | |||
4294 | !ArgType.getObjCLifetime()) { | |||
4295 | Qualifiers Qs; | |||
4296 | Qs.setObjCLifetime(Qualifiers::OCL_Strong); | |||
4297 | ArgType = Context.getQualifiedType(ArgType, Qs); | |||
4298 | } | |||
4299 | ||||
4300 | Converted.push_back(TemplateArgument(ArgType)); | |||
4301 | return false; | |||
4302 | } | |||
4303 | ||||
4304 | /// \brief Substitute template arguments into the default template argument for | |||
4305 | /// the given template type parameter. | |||
4306 | /// | |||
4307 | /// \param SemaRef the semantic analysis object for which we are performing | |||
4308 | /// the substitution. | |||
4309 | /// | |||
4310 | /// \param Template the template that we are synthesizing template arguments | |||
4311 | /// for. | |||
4312 | /// | |||
4313 | /// \param TemplateLoc the location of the template name that started the | |||
4314 | /// template-id we are checking. | |||
4315 | /// | |||
4316 | /// \param RAngleLoc the location of the right angle bracket ('>') that | |||
4317 | /// terminates the template-id. | |||
4318 | /// | |||
4319 | /// \param Param the template template parameter whose default we are | |||
4320 | /// substituting into. | |||
4321 | /// | |||
4322 | /// \param Converted the list of template arguments provided for template | |||
4323 | /// parameters that precede \p Param in the template parameter list. | |||
4324 | /// \returns the substituted template argument, or NULL if an error occurred. | |||
4325 | static TypeSourceInfo * | |||
4326 | SubstDefaultTemplateArgument(Sema &SemaRef, | |||
4327 | TemplateDecl *Template, | |||
4328 | SourceLocation TemplateLoc, | |||
4329 | SourceLocation RAngleLoc, | |||
4330 | TemplateTypeParmDecl *Param, | |||
4331 | SmallVectorImpl<TemplateArgument> &Converted) { | |||
4332 | TypeSourceInfo *ArgType = Param->getDefaultArgumentInfo(); | |||
4333 | ||||
4334 | // If the argument type is dependent, instantiate it now based | |||
4335 | // on the previously-computed template arguments. | |||
4336 | if (ArgType->getType()->isDependentType()) { | |||
4337 | Sema::InstantiatingTemplate Inst(SemaRef, TemplateLoc, | |||
4338 | Param, Template, Converted, | |||
4339 | SourceRange(TemplateLoc, RAngleLoc)); | |||
4340 | if (Inst.isInvalid()) | |||
4341 | return nullptr; | |||
4342 | ||||
4343 | TemplateArgumentList TemplateArgs(TemplateArgumentList::OnStack, Converted); | |||
4344 | ||||
4345 | // Only substitute for the innermost template argument list. | |||
4346 | MultiLevelTemplateArgumentList TemplateArgLists; | |||
4347 | TemplateArgLists.addOuterTemplateArguments(&TemplateArgs); | |||
4348 | for (unsigned i = 0, e = Param->getDepth(); i != e; ++i) | |||
4349 | TemplateArgLists.addOuterTemplateArguments(None); | |||
4350 | ||||
4351 | Sema::ContextRAII SavedContext(SemaRef, Template->getDeclContext()); | |||
4352 | ArgType = | |||
4353 | SemaRef.SubstType(ArgType, TemplateArgLists, | |||
4354 | Param->getDefaultArgumentLoc(), Param->getDeclName()); | |||
4355 | } | |||
4356 | ||||
4357 | return ArgType; | |||
4358 | } | |||
4359 | ||||
4360 | /// \brief Substitute template arguments into the default template argument for | |||
4361 | /// the given non-type template parameter. | |||
4362 | /// | |||
4363 | /// \param SemaRef the semantic analysis object for which we are performing | |||
4364 | /// the substitution. | |||
4365 | /// | |||
4366 | /// \param Template the template that we are synthesizing template arguments | |||
4367 | /// for. | |||
4368 | /// | |||
4369 | /// \param TemplateLoc the location of the template name that started the | |||
4370 | /// template-id we are checking. | |||
4371 | /// | |||
4372 | /// \param RAngleLoc the location of the right angle bracket ('>') that | |||
4373 | /// terminates the template-id. | |||
4374 | /// | |||
4375 | /// \param Param the non-type template parameter whose default we are | |||
4376 | /// substituting into. | |||
4377 | /// | |||
4378 | /// \param Converted the list of template arguments provided for template | |||
4379 | /// parameters that precede \p Param in the template parameter list. | |||
4380 | /// | |||
4381 | /// \returns the substituted template argument, or NULL if an error occurred. | |||
4382 | static ExprResult | |||
4383 | SubstDefaultTemplateArgument(Sema &SemaRef, | |||
4384 | TemplateDecl *Template, | |||
4385 | SourceLocation TemplateLoc, | |||
4386 | SourceLocation RAngleLoc, | |||
4387 | NonTypeTemplateParmDecl *Param, | |||
4388 | SmallVectorImpl<TemplateArgument> &Converted) { | |||
4389 | Sema::InstantiatingTemplate Inst(SemaRef, TemplateLoc, | |||
4390 | Param, Template, Converted, | |||
4391 | SourceRange(TemplateLoc, RAngleLoc)); | |||
4392 | if (Inst.isInvalid()) | |||
4393 | return ExprError(); | |||
4394 | ||||
4395 | TemplateArgumentList TemplateArgs(TemplateArgumentList::OnStack, Converted); | |||
4396 | ||||
4397 | // Only substitute for the innermost template argument list. | |||
4398 | MultiLevelTemplateArgumentList TemplateArgLists; | |||
4399 | TemplateArgLists.addOuterTemplateArguments(&TemplateArgs); | |||
4400 | for (unsigned i = 0, e = Param->getDepth(); i != e; ++i) | |||
4401 | TemplateArgLists.addOuterTemplateArguments(None); | |||
4402 | ||||
4403 | EnterExpressionEvaluationContext ConstantEvaluated( | |||
4404 | SemaRef, Sema::ExpressionEvaluationContext::ConstantEvaluated); | |||
4405 | return SemaRef.SubstExpr(Param->getDefaultArgument(), TemplateArgLists); | |||
4406 | } | |||
4407 | ||||
4408 | /// \brief Substitute template arguments into the default template argument for | |||
4409 | /// the given template template parameter. | |||
4410 | /// | |||
4411 | /// \param SemaRef the semantic analysis object for which we are performing | |||
4412 | /// the substitution. | |||
4413 | /// | |||
4414 | /// \param Template the template that we are synthesizing template arguments | |||
4415 | /// for. | |||
4416 | /// | |||
4417 | /// \param TemplateLoc the location of the template name that started the | |||
4418 | /// template-id we are checking. | |||
4419 | /// | |||
4420 | /// \param RAngleLoc the location of the right angle bracket ('>') that | |||
4421 | /// terminates the template-id. | |||
4422 | /// | |||
4423 | /// \param Param the template template parameter whose default we are | |||
4424 | /// substituting into. | |||
4425 | /// | |||
4426 | /// \param Converted the list of template arguments provided for template | |||
4427 | /// parameters that precede \p Param in the template parameter list. | |||
4428 | /// | |||
4429 | /// \param QualifierLoc Will be set to the nested-name-specifier (with | |||
4430 | /// source-location information) that precedes the template name. | |||
4431 | /// | |||
4432 | /// \returns the substituted template argument, or NULL if an error occurred. | |||
4433 | static TemplateName | |||
4434 | SubstDefaultTemplateArgument(Sema &SemaRef, | |||
4435 | TemplateDecl *Template, | |||
4436 | SourceLocation TemplateLoc, | |||
4437 | SourceLocation RAngleLoc, | |||
4438 | TemplateTemplateParmDecl *Param, | |||
4439 | SmallVectorImpl<TemplateArgument> &Converted, | |||
4440 | NestedNameSpecifierLoc &QualifierLoc) { | |||
4441 | Sema::InstantiatingTemplate Inst( | |||
4442 | SemaRef, TemplateLoc, TemplateParameter(Param), Template, Converted, | |||
4443 | SourceRange(TemplateLoc, RAngleLoc)); | |||
4444 | if (Inst.isInvalid()) | |||
4445 | return TemplateName(); | |||
4446 | ||||
4447 | TemplateArgumentList TemplateArgs(TemplateArgumentList::OnStack, Converted); | |||
4448 | ||||
4449 | // Only substitute for the innermost template argument list. | |||
4450 | MultiLevelTemplateArgumentList TemplateArgLists; | |||
4451 | TemplateArgLists.addOuterTemplateArguments(&TemplateArgs); | |||
4452 | for (unsigned i = 0, e = Param->getDepth(); i != e; ++i) | |||
4453 | TemplateArgLists.addOuterTemplateArguments(None); | |||
4454 | ||||
4455 | Sema::ContextRAII SavedContext(SemaRef, Template->getDeclContext()); | |||
4456 | // Substitute into the nested-name-specifier first, | |||
4457 | QualifierLoc = Param->getDefaultArgument().getTemplateQualifierLoc(); | |||
4458 | if (QualifierLoc) { | |||
4459 | QualifierLoc = | |||
4460 | SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc, TemplateArgLists); | |||
4461 | if (!QualifierLoc) | |||
4462 | return TemplateName(); | |||
4463 | } | |||
4464 | ||||
4465 | return SemaRef.SubstTemplateName( | |||
4466 | QualifierLoc, | |||
4467 | Param->getDefaultArgument().getArgument().getAsTemplate(), | |||
4468 | Param->getDefaultArgument().getTemplateNameLoc(), | |||
4469 | TemplateArgLists); | |||
4470 | } | |||
4471 | ||||
4472 | /// \brief If the given template parameter has a default template | |||
4473 | /// argument, substitute into that default template argument and | |||
4474 | /// return the corresponding template argument. | |||
4475 | TemplateArgumentLoc | |||
4476 | Sema::SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, | |||
4477 | SourceLocation TemplateLoc, | |||
4478 | SourceLocation RAngleLoc, | |||
4479 | Decl *Param, | |||
4480 | SmallVectorImpl<TemplateArgument> | |||
4481 | &Converted, | |||
4482 | bool &HasDefaultArg) { | |||
4483 | HasDefaultArg = false; | |||
4484 | ||||
4485 | if (TemplateTypeParmDecl *TypeParm = dyn_cast<TemplateTypeParmDecl>(Param)) { | |||
4486 | if (!hasVisibleDefaultArgument(TypeParm)) | |||
4487 | return TemplateArgumentLoc(); | |||
4488 | ||||
4489 | HasDefaultArg = true; | |||
4490 | TypeSourceInfo *DI = SubstDefaultTemplateArgument(*this, Template, | |||
4491 | TemplateLoc, | |||
4492 | RAngleLoc, | |||
4493 | TypeParm, | |||
4494 | Converted); | |||
4495 | if (DI) | |||
4496 | return TemplateArgumentLoc(TemplateArgument(DI->getType()), DI); | |||
4497 | ||||
4498 | return TemplateArgumentLoc(); | |||
4499 | } | |||
4500 | ||||
4501 | if (NonTypeTemplateParmDecl *NonTypeParm | |||
4502 | = dyn_cast<NonTypeTemplateParmDecl>(Param)) { | |||
4503 | if (!hasVisibleDefaultArgument(NonTypeParm)) | |||
4504 | return TemplateArgumentLoc(); | |||
4505 | ||||
4506 | HasDefaultArg = true; | |||
4507 | ExprResult Arg = SubstDefaultTemplateArgument(*this, Template, | |||
4508 | TemplateLoc, | |||
4509 | RAngleLoc, | |||
4510 | NonTypeParm, | |||
4511 | Converted); | |||
4512 | if (Arg.isInvalid()) | |||
4513 | return TemplateArgumentLoc(); | |||
4514 | ||||
4515 | Expr *ArgE = Arg.getAs<Expr>(); | |||
4516 | return TemplateArgumentLoc(TemplateArgument(ArgE), ArgE); | |||
4517 | } | |||
4518 | ||||
4519 | TemplateTemplateParmDecl *TempTempParm | |||
4520 | = cast<TemplateTemplateParmDecl>(Param); | |||
4521 | if (!hasVisibleDefaultArgument(TempTempParm)) | |||
4522 | return TemplateArgumentLoc(); | |||
4523 | ||||
4524 | HasDefaultArg = true; | |||
4525 | NestedNameSpecifierLoc QualifierLoc; | |||
4526 | TemplateName TName = SubstDefaultTemplateArgument(*this, Template, | |||
4527 | TemplateLoc, | |||
4528 | RAngleLoc, | |||
4529 | TempTempParm, | |||
4530 | Converted, | |||
4531 | QualifierLoc); | |||
4532 | if (TName.isNull()) | |||
4533 | return TemplateArgumentLoc(); | |||
4534 | ||||
4535 | return TemplateArgumentLoc(TemplateArgument(TName), | |||
4536 | TempTempParm->getDefaultArgument().getTemplateQualifierLoc(), | |||
4537 | TempTempParm->getDefaultArgument().getTemplateNameLoc()); | |||
4538 | } | |||
4539 | ||||
4540 | /// Convert a template-argument that we parsed as a type into a template, if | |||
4541 | /// possible. C++ permits injected-class-names to perform dual service as | |||
4542 | /// template template arguments and as template type arguments. | |||
4543 | static TemplateArgumentLoc convertTypeTemplateArgumentToTemplate(TypeLoc TLoc) { | |||
4544 | // Extract and step over any surrounding nested-name-specifier. | |||
4545 | NestedNameSpecifierLoc QualLoc; | |||
4546 | if (auto ETLoc = TLoc.getAs<ElaboratedTypeLoc>()) { | |||
4547 | if (ETLoc.getTypePtr()->getKeyword() != ETK_None) | |||
4548 | return TemplateArgumentLoc(); | |||
4549 | ||||
4550 | QualLoc = ETLoc.getQualifierLoc(); | |||
4551 | TLoc = ETLoc.getNamedTypeLoc(); | |||
4552 | } | |||
4553 | ||||
4554 | // If this type was written as an injected-class-name, it can be used as a | |||
4555 | // template template argument. | |||
4556 | if (auto InjLoc = TLoc.getAs<InjectedClassNameTypeLoc>()) | |||
4557 | return TemplateArgumentLoc(InjLoc.getTypePtr()->getTemplateName(), | |||
4558 | QualLoc, InjLoc.getNameLoc()); | |||
4559 | ||||
4560 | // If this type was written as an injected-class-name, it may have been | |||
4561 | // converted to a RecordType during instantiation. If the RecordType is | |||
4562 | // *not* wrapped in a TemplateSpecializationType and denotes a class | |||
4563 | // template specialization, it must have come from an injected-class-name. | |||
4564 | if (auto RecLoc = TLoc.getAs<RecordTypeLoc>()) | |||
4565 | if (auto *CTSD = | |||
4566 | dyn_cast<ClassTemplateSpecializationDecl>(RecLoc.getDecl())) | |||
4567 | return TemplateArgumentLoc(TemplateName(CTSD->getSpecializedTemplate()), | |||
4568 | QualLoc, RecLoc.getNameLoc()); | |||
4569 | ||||
4570 | return TemplateArgumentLoc(); | |||
4571 | } | |||
4572 | ||||
4573 | /// \brief Check that the given template argument corresponds to the given | |||
4574 | /// template parameter. | |||
4575 | /// | |||
4576 | /// \param Param The template parameter against which the argument will be | |||
4577 | /// checked. | |||
4578 | /// | |||
4579 | /// \param Arg The template argument, which may be updated due to conversions. | |||
4580 | /// | |||
4581 | /// \param Template The template in which the template argument resides. | |||
4582 | /// | |||
4583 | /// \param TemplateLoc The location of the template name for the template | |||
4584 | /// whose argument list we're matching. | |||
4585 | /// | |||
4586 | /// \param RAngleLoc The location of the right angle bracket ('>') that closes | |||
4587 | /// the template argument list. | |||
4588 | /// | |||
4589 | /// \param ArgumentPackIndex The index into the argument pack where this | |||
4590 | /// argument will be placed. Only valid if the parameter is a parameter pack. | |||
4591 | /// | |||
4592 | /// \param Converted The checked, converted argument will be added to the | |||
4593 | /// end of this small vector. | |||
4594 | /// | |||
4595 | /// \param CTAK Describes how we arrived at this particular template argument: | |||
4596 | /// explicitly written, deduced, etc. | |||
4597 | /// | |||
4598 | /// \returns true on error, false otherwise. | |||
4599 | bool Sema::CheckTemplateArgument(NamedDecl *Param, | |||
4600 | TemplateArgumentLoc &Arg, | |||
4601 | NamedDecl *Template, | |||
4602 | SourceLocation TemplateLoc, | |||
4603 | SourceLocation RAngleLoc, | |||
4604 | unsigned ArgumentPackIndex, | |||
4605 | SmallVectorImpl<TemplateArgument> &Converted, | |||
4606 | CheckTemplateArgumentKind CTAK) { | |||
4607 | // Check template type parameters. | |||
4608 | if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(Param)) | |||
4609 | return CheckTemplateTypeArgument(TTP, Arg, Converted); | |||
4610 | ||||
4611 | // Check non-type template parameters. | |||
4612 | if (NonTypeTemplateParmDecl *NTTP =dyn_cast<NonTypeTemplateParmDecl>(Param)) { | |||
4613 | // Do substitution on the type of the non-type template parameter | |||
4614 | // with the template arguments we've seen thus far. But if the | |||
4615 | // template has a dependent context then we cannot substitute yet. | |||
4616 | QualType NTTPType = NTTP->getType(); | |||
4617 | if (NTTP->isParameterPack() && NTTP->isExpandedParameterPack()) | |||
4618 | NTTPType = NTTP->getExpansionType(ArgumentPackIndex); | |||
4619 | ||||
4620 | // FIXME: Do we need to substitute into parameters here if they're | |||
4621 | // instantiation-dependent but not dependent? | |||
4622 | if (NTTPType->isDependentType() && | |||
4623 | !isa<TemplateTemplateParmDecl>(Template) && | |||
4624 | !Template->getDeclContext()->isDependentContext()) { | |||
4625 | // Do substitution on the type of the non-type template parameter. | |||
4626 | InstantiatingTemplate Inst(*this, TemplateLoc, Template, | |||
4627 | NTTP, Converted, | |||
4628 | SourceRange(TemplateLoc, RAngleLoc)); | |||
4629 | if (Inst.isInvalid()) | |||
4630 | return true; | |||
4631 | ||||
4632 | TemplateArgumentList TemplateArgs(TemplateArgumentList::OnStack, | |||
4633 | Converted); | |||
4634 | NTTPType = SubstType(NTTPType, | |||
4635 | MultiLevelTemplateArgumentList(TemplateArgs), | |||
4636 | NTTP->getLocation(), | |||
4637 | NTTP->getDeclName()); | |||
4638 | // If that worked, check the non-type template parameter type | |||
4639 | // for validity. | |||
4640 | if (!NTTPType.isNull()) | |||
4641 | NTTPType = CheckNonTypeTemplateParameterType(NTTPType, | |||
4642 | NTTP->getLocation()); | |||
4643 | if (NTTPType.isNull()) | |||
4644 | return true; | |||
4645 | } | |||
4646 | ||||
4647 | switch (Arg.getArgument().getKind()) { | |||
4648 | case TemplateArgument::Null: | |||
4649 | 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-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 4649); | |||
4650 | ||||
4651 | case TemplateArgument::Expression: { | |||
4652 | TemplateArgument Result; | |||
4653 | ExprResult Res = | |||
4654 | CheckTemplateArgument(NTTP, NTTPType, Arg.getArgument().getAsExpr(), | |||
4655 | Result, CTAK); | |||
4656 | if (Res.isInvalid()) | |||
4657 | return true; | |||
4658 | ||||
4659 | // If the resulting expression is new, then use it in place of the | |||
4660 | // old expression in the template argument. | |||
4661 | if (Res.get() != Arg.getArgument().getAsExpr()) { | |||
4662 | TemplateArgument TA(Res.get()); | |||
4663 | Arg = TemplateArgumentLoc(TA, Res.get()); | |||
4664 | } | |||
4665 | ||||
4666 | Converted.push_back(Result); | |||
4667 | break; | |||
4668 | } | |||
4669 | ||||
4670 | case TemplateArgument::Declaration: | |||
4671 | case TemplateArgument::Integral: | |||
4672 | case TemplateArgument::NullPtr: | |||
4673 | // We've already checked this template argument, so just copy | |||
4674 | // it to the list of converted arguments. | |||
4675 | Converted.push_back(Arg.getArgument()); | |||
4676 | break; | |||
4677 | ||||
4678 | case TemplateArgument::Template: | |||
4679 | case TemplateArgument::TemplateExpansion: | |||
4680 | // We were given a template template argument. It may not be ill-formed; | |||
4681 | // see below. | |||
4682 | if (DependentTemplateName *DTN | |||
4683 | = Arg.getArgument().getAsTemplateOrTemplatePattern() | |||
4684 | .getAsDependentTemplateName()) { | |||
4685 | // We have a template argument such as \c T::template X, which we | |||
4686 | // parsed as a template template argument. However, since we now | |||
4687 | // know that we need a non-type template argument, convert this | |||
4688 | // template name into an expression. | |||
4689 | ||||
4690 | DeclarationNameInfo NameInfo(DTN->getIdentifier(), | |||
4691 | Arg.getTemplateNameLoc()); | |||
4692 | ||||
4693 | CXXScopeSpec SS; | |||
4694 | SS.Adopt(Arg.getTemplateQualifierLoc()); | |||
4695 | // FIXME: the template-template arg was a DependentTemplateName, | |||
4696 | // so it was provided with a template keyword. However, its source | |||
4697 | // location is not stored in the template argument structure. | |||
4698 | SourceLocation TemplateKWLoc; | |||
4699 | ExprResult E = DependentScopeDeclRefExpr::Create( | |||
4700 | Context, SS.getWithLocInContext(Context), TemplateKWLoc, NameInfo, | |||
4701 | nullptr); | |||
4702 | ||||
4703 | // If we parsed the template argument as a pack expansion, create a | |||
4704 | // pack expansion expression. | |||
4705 | if (Arg.getArgument().getKind() == TemplateArgument::TemplateExpansion){ | |||
4706 | E = ActOnPackExpansion(E.get(), Arg.getTemplateEllipsisLoc()); | |||
4707 | if (E.isInvalid()) | |||
4708 | return true; | |||
4709 | } | |||
4710 | ||||
4711 | TemplateArgument Result; | |||
4712 | E = CheckTemplateArgument(NTTP, NTTPType, E.get(), Result); | |||
4713 | if (E.isInvalid()) | |||
4714 | return true; | |||
4715 | ||||
4716 | Converted.push_back(Result); | |||
4717 | break; | |||
4718 | } | |||
4719 | ||||
4720 | // We have a template argument that actually does refer to a class | |||
4721 | // template, alias template, or template template parameter, and | |||
4722 | // therefore cannot be a non-type template argument. | |||
4723 | Diag(Arg.getLocation(), diag::err_template_arg_must_be_expr) | |||
4724 | << Arg.getSourceRange(); | |||
4725 | ||||
4726 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
4727 | return true; | |||
4728 | ||||
4729 | case TemplateArgument::Type: { | |||
4730 | // We have a non-type template parameter but the template | |||
4731 | // argument is a type. | |||
4732 | ||||
4733 | // C++ [temp.arg]p2: | |||
4734 | // In a template-argument, an ambiguity between a type-id and | |||
4735 | // an expression is resolved to a type-id, regardless of the | |||
4736 | // form of the corresponding template-parameter. | |||
4737 | // | |||
4738 | // We warn specifically about this case, since it can be rather | |||
4739 | // confusing for users. | |||
4740 | QualType T = Arg.getArgument().getAsType(); | |||
4741 | SourceRange SR = Arg.getSourceRange(); | |||
4742 | if (T->isFunctionType()) | |||
4743 | Diag(SR.getBegin(), diag::err_template_arg_nontype_ambig) << SR << T; | |||
4744 | else | |||
4745 | Diag(SR.getBegin(), diag::err_template_arg_must_be_expr) << SR; | |||
4746 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
4747 | return true; | |||
4748 | } | |||
4749 | ||||
4750 | case TemplateArgument::Pack: | |||
4751 | llvm_unreachable("Caller must expand template argument packs")::llvm::llvm_unreachable_internal("Caller must expand template argument packs" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 4751); | |||
4752 | } | |||
4753 | ||||
4754 | return false; | |||
4755 | } | |||
4756 | ||||
4757 | ||||
4758 | // Check template template parameters. | |||
4759 | TemplateTemplateParmDecl *TempParm = cast<TemplateTemplateParmDecl>(Param); | |||
4760 | ||||
4761 | TemplateParameterList *Params = TempParm->getTemplateParameters(); | |||
4762 | if (TempParm->isExpandedParameterPack()) | |||
4763 | Params = TempParm->getExpansionTemplateParameters(ArgumentPackIndex); | |||
4764 | ||||
4765 | // Substitute into the template parameter list of the template | |||
4766 | // template parameter, since previously-supplied template arguments | |||
4767 | // may appear within the template template parameter. | |||
4768 | // | |||
4769 | // FIXME: Skip this if the parameters aren't instantiation-dependent. | |||
4770 | { | |||
4771 | // Set up a template instantiation context. | |||
4772 | LocalInstantiationScope Scope(*this); | |||
4773 | InstantiatingTemplate Inst(*this, TemplateLoc, Template, | |||
4774 | TempParm, Converted, | |||
4775 | SourceRange(TemplateLoc, RAngleLoc)); | |||
4776 | if (Inst.isInvalid()) | |||
4777 | return true; | |||
4778 | ||||
4779 | TemplateArgumentList TemplateArgs(TemplateArgumentList::OnStack, Converted); | |||
4780 | Params = SubstTemplateParams(Params, CurContext, | |||
4781 | MultiLevelTemplateArgumentList(TemplateArgs)); | |||
4782 | if (!Params) | |||
4783 | return true; | |||
4784 | } | |||
4785 | ||||
4786 | // C++1z [temp.local]p1: (DR1004) | |||
4787 | // When [the injected-class-name] is used [...] as a template-argument for | |||
4788 | // a template template-parameter [...] it refers to the class template | |||
4789 | // itself. | |||
4790 | if (Arg.getArgument().getKind() == TemplateArgument::Type) { | |||
4791 | TemplateArgumentLoc ConvertedArg = convertTypeTemplateArgumentToTemplate( | |||
4792 | Arg.getTypeSourceInfo()->getTypeLoc()); | |||
4793 | if (!ConvertedArg.getArgument().isNull()) | |||
4794 | Arg = ConvertedArg; | |||
4795 | } | |||
4796 | ||||
4797 | switch (Arg.getArgument().getKind()) { | |||
4798 | case TemplateArgument::Null: | |||
4799 | 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-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 4799); | |||
4800 | ||||
4801 | case TemplateArgument::Template: | |||
4802 | case TemplateArgument::TemplateExpansion: | |||
4803 | if (CheckTemplateTemplateArgument(Params, Arg)) | |||
4804 | return true; | |||
4805 | ||||
4806 | Converted.push_back(Arg.getArgument()); | |||
4807 | break; | |||
4808 | ||||
4809 | case TemplateArgument::Expression: | |||
4810 | case TemplateArgument::Type: | |||
4811 | // We have a template template parameter but the template | |||
4812 | // argument does not refer to a template. | |||
4813 | Diag(Arg.getLocation(), diag::err_template_arg_must_be_template) | |||
4814 | << getLangOpts().CPlusPlus11; | |||
4815 | return true; | |||
4816 | ||||
4817 | case TemplateArgument::Declaration: | |||
4818 | llvm_unreachable("Declaration argument with template template parameter")::llvm::llvm_unreachable_internal("Declaration argument with template template parameter" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 4818); | |||
4819 | case TemplateArgument::Integral: | |||
4820 | llvm_unreachable("Integral argument with template template parameter")::llvm::llvm_unreachable_internal("Integral argument with template template parameter" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 4820); | |||
4821 | case TemplateArgument::NullPtr: | |||
4822 | llvm_unreachable("Null pointer argument with template template parameter")::llvm::llvm_unreachable_internal("Null pointer argument with template template parameter" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 4822); | |||
4823 | ||||
4824 | case TemplateArgument::Pack: | |||
4825 | llvm_unreachable("Caller must expand template argument packs")::llvm::llvm_unreachable_internal("Caller must expand template argument packs" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 4825); | |||
4826 | } | |||
4827 | ||||
4828 | return false; | |||
4829 | } | |||
4830 | ||||
4831 | /// \brief Diagnose an arity mismatch in the | |||
4832 | static bool diagnoseArityMismatch(Sema &S, TemplateDecl *Template, | |||
4833 | SourceLocation TemplateLoc, | |||
4834 | TemplateArgumentListInfo &TemplateArgs) { | |||
4835 | TemplateParameterList *Params = Template->getTemplateParameters(); | |||
4836 | unsigned NumParams = Params->size(); | |||
4837 | unsigned NumArgs = TemplateArgs.size(); | |||
4838 | ||||
4839 | SourceRange Range; | |||
4840 | if (NumArgs > NumParams) | |||
4841 | Range = SourceRange(TemplateArgs[NumParams].getLocation(), | |||
4842 | TemplateArgs.getRAngleLoc()); | |||
4843 | S.Diag(TemplateLoc, diag::err_template_arg_list_different_arity) | |||
4844 | << (NumArgs > NumParams) | |||
4845 | << (int)S.getTemplateNameKindForDiagnostics(TemplateName(Template)) | |||
4846 | << Template << Range; | |||
4847 | S.Diag(Template->getLocation(), diag::note_template_decl_here) | |||
4848 | << Params->getSourceRange(); | |||
4849 | return true; | |||
4850 | } | |||
4851 | ||||
4852 | /// \brief Check whether the template parameter is a pack expansion, and if so, | |||
4853 | /// determine the number of parameters produced by that expansion. For instance: | |||
4854 | /// | |||
4855 | /// \code | |||
4856 | /// template<typename ...Ts> struct A { | |||
4857 | /// template<Ts ...NTs, template<Ts> class ...TTs, typename ...Us> struct B; | |||
4858 | /// }; | |||
4859 | /// \endcode | |||
4860 | /// | |||
4861 | /// In \c A<int,int>::B, \c NTs and \c TTs have expanded pack size 2, and \c Us | |||
4862 | /// is not a pack expansion, so returns an empty Optional. | |||
4863 | static Optional<unsigned> getExpandedPackSize(NamedDecl *Param) { | |||
4864 | if (NonTypeTemplateParmDecl *NTTP | |||
4865 | = dyn_cast<NonTypeTemplateParmDecl>(Param)) { | |||
4866 | if (NTTP->isExpandedParameterPack()) | |||
4867 | return NTTP->getNumExpansionTypes(); | |||
4868 | } | |||
4869 | ||||
4870 | if (TemplateTemplateParmDecl *TTP | |||
4871 | = dyn_cast<TemplateTemplateParmDecl>(Param)) { | |||
4872 | if (TTP->isExpandedParameterPack()) | |||
4873 | return TTP->getNumExpansionTemplateParameters(); | |||
4874 | } | |||
4875 | ||||
4876 | return None; | |||
4877 | } | |||
4878 | ||||
4879 | /// Diagnose a missing template argument. | |||
4880 | template<typename TemplateParmDecl> | |||
4881 | static bool diagnoseMissingArgument(Sema &S, SourceLocation Loc, | |||
4882 | TemplateDecl *TD, | |||
4883 | const TemplateParmDecl *D, | |||
4884 | TemplateArgumentListInfo &Args) { | |||
4885 | // Dig out the most recent declaration of the template parameter; there may be | |||
4886 | // declarations of the template that are more recent than TD. | |||
4887 | D = cast<TemplateParmDecl>(cast<TemplateDecl>(TD->getMostRecentDecl()) | |||
4888 | ->getTemplateParameters() | |||
4889 | ->getParam(D->getIndex())); | |||
4890 | ||||
4891 | // If there's a default argument that's not visible, diagnose that we're | |||
4892 | // missing a module import. | |||
4893 | llvm::SmallVector<Module*, 8> Modules; | |||
4894 | if (D->hasDefaultArgument() && !S.hasVisibleDefaultArgument(D, &Modules)) { | |||
4895 | S.diagnoseMissingImport(Loc, cast<NamedDecl>(TD), | |||
4896 | D->getDefaultArgumentLoc(), Modules, | |||
4897 | Sema::MissingImportKind::DefaultArgument, | |||
4898 | /*Recover*/true); | |||
4899 | return true; | |||
4900 | } | |||
4901 | ||||
4902 | // FIXME: If there's a more recent default argument that *is* visible, | |||
4903 | // diagnose that it was declared too late. | |||
4904 | ||||
4905 | return diagnoseArityMismatch(S, TD, Loc, Args); | |||
4906 | } | |||
4907 | ||||
4908 | /// \brief Check that the given template argument list is well-formed | |||
4909 | /// for specializing the given template. | |||
4910 | bool Sema::CheckTemplateArgumentList( | |||
4911 | TemplateDecl *Template, SourceLocation TemplateLoc, | |||
4912 | TemplateArgumentListInfo &TemplateArgs, bool PartialTemplateArgs, | |||
4913 | SmallVectorImpl<TemplateArgument> &Converted, | |||
4914 | bool UpdateArgsWithConversions) { | |||
4915 | // Make a copy of the template arguments for processing. Only make the | |||
4916 | // changes at the end when successful in matching the arguments to the | |||
4917 | // template. | |||
4918 | TemplateArgumentListInfo NewArgs = TemplateArgs; | |||
4919 | ||||
4920 | // Make sure we get the template parameter list from the most | |||
4921 | // recentdeclaration, since that is the only one that has is guaranteed to | |||
4922 | // have all the default template argument information. | |||
4923 | TemplateParameterList *Params = | |||
4924 | cast<TemplateDecl>(Template->getMostRecentDecl()) | |||
4925 | ->getTemplateParameters(); | |||
4926 | ||||
4927 | SourceLocation RAngleLoc = NewArgs.getRAngleLoc(); | |||
4928 | ||||
4929 | // C++ [temp.arg]p1: | |||
4930 | // [...] The type and form of each template-argument specified in | |||
4931 | // a template-id shall match the type and form specified for the | |||
4932 | // corresponding parameter declared by the template in its | |||
4933 | // template-parameter-list. | |||
4934 | bool isTemplateTemplateParameter = isa<TemplateTemplateParmDecl>(Template); | |||
4935 | SmallVector<TemplateArgument, 2> ArgumentPack; | |||
4936 | unsigned ArgIdx = 0, NumArgs = NewArgs.size(); | |||
4937 | LocalInstantiationScope InstScope(*this, true); | |||
4938 | for (TemplateParameterList::iterator Param = Params->begin(), | |||
4939 | ParamEnd = Params->end(); | |||
4940 | Param != ParamEnd; /* increment in loop */) { | |||
4941 | // If we have an expanded parameter pack, make sure we don't have too | |||
4942 | // many arguments. | |||
4943 | if (Optional<unsigned> Expansions = getExpandedPackSize(*Param)) { | |||
4944 | if (*Expansions == ArgumentPack.size()) { | |||
4945 | // We're done with this parameter pack. Pack up its arguments and add | |||
4946 | // them to the list. | |||
4947 | Converted.push_back( | |||
4948 | TemplateArgument::CreatePackCopy(Context, ArgumentPack)); | |||
4949 | ArgumentPack.clear(); | |||
4950 | ||||
4951 | // This argument is assigned to the next parameter. | |||
4952 | ++Param; | |||
4953 | continue; | |||
4954 | } else if (ArgIdx == NumArgs && !PartialTemplateArgs) { | |||
4955 | // Not enough arguments for this parameter pack. | |||
4956 | Diag(TemplateLoc, diag::err_template_arg_list_different_arity) | |||
4957 | << false | |||
4958 | << (int)getTemplateNameKindForDiagnostics(TemplateName(Template)) | |||
4959 | << Template; | |||
4960 | Diag(Template->getLocation(), diag::note_template_decl_here) | |||
4961 | << Params->getSourceRange(); | |||
4962 | return true; | |||
4963 | } | |||
4964 | } | |||
4965 | ||||
4966 | if (ArgIdx < NumArgs) { | |||
4967 | // Check the template argument we were given. | |||
4968 | if (CheckTemplateArgument(*Param, NewArgs[ArgIdx], Template, | |||
4969 | TemplateLoc, RAngleLoc, | |||
4970 | ArgumentPack.size(), Converted)) | |||
4971 | return true; | |||
4972 | ||||
4973 | bool PackExpansionIntoNonPack = | |||
4974 | NewArgs[ArgIdx].getArgument().isPackExpansion() && | |||
4975 | (!(*Param)->isTemplateParameterPack() || getExpandedPackSize(*Param)); | |||
4976 | if (PackExpansionIntoNonPack && isa<TypeAliasTemplateDecl>(Template)) { | |||
4977 | // Core issue 1430: we have a pack expansion as an argument to an | |||
4978 | // alias template, and it's not part of a parameter pack. This | |||
4979 | // can't be canonicalized, so reject it now. | |||
4980 | Diag(NewArgs[ArgIdx].getLocation(), | |||
4981 | diag::err_alias_template_expansion_into_fixed_list) | |||
4982 | << NewArgs[ArgIdx].getSourceRange(); | |||
4983 | Diag((*Param)->getLocation(), diag::note_template_param_here); | |||
4984 | return true; | |||
4985 | } | |||
4986 | ||||
4987 | // We're now done with this argument. | |||
4988 | ++ArgIdx; | |||
4989 | ||||
4990 | if ((*Param)->isTemplateParameterPack()) { | |||
4991 | // The template parameter was a template parameter pack, so take the | |||
4992 | // deduced argument and place it on the argument pack. Note that we | |||
4993 | // stay on the same template parameter so that we can deduce more | |||
4994 | // arguments. | |||
4995 | ArgumentPack.push_back(Converted.pop_back_val()); | |||
4996 | } else { | |||
4997 | // Move to the next template parameter. | |||
4998 | ++Param; | |||
4999 | } | |||
5000 | ||||
5001 | // If we just saw a pack expansion into a non-pack, then directly convert | |||
5002 | // the remaining arguments, because we don't know what parameters they'll | |||
5003 | // match up with. | |||
5004 | if (PackExpansionIntoNonPack) { | |||
5005 | if (!ArgumentPack.empty()) { | |||
5006 | // If we were part way through filling in an expanded parameter pack, | |||
5007 | // fall back to just producing individual arguments. | |||
5008 | Converted.insert(Converted.end(), | |||
5009 | ArgumentPack.begin(), ArgumentPack.end()); | |||
5010 | ArgumentPack.clear(); | |||
5011 | } | |||
5012 | ||||
5013 | while (ArgIdx < NumArgs) { | |||
5014 | Converted.push_back(NewArgs[ArgIdx].getArgument()); | |||
5015 | ++ArgIdx; | |||
5016 | } | |||
5017 | ||||
5018 | return false; | |||
5019 | } | |||
5020 | ||||
5021 | continue; | |||
5022 | } | |||
5023 | ||||
5024 | // If we're checking a partial template argument list, we're done. | |||
5025 | if (PartialTemplateArgs) { | |||
5026 | if ((*Param)->isTemplateParameterPack() && !ArgumentPack.empty()) | |||
5027 | Converted.push_back( | |||
5028 | TemplateArgument::CreatePackCopy(Context, ArgumentPack)); | |||
5029 | ||||
5030 | return false; | |||
5031 | } | |||
5032 | ||||
5033 | // If we have a template parameter pack with no more corresponding | |||
5034 | // arguments, just break out now and we'll fill in the argument pack below. | |||
5035 | if ((*Param)->isTemplateParameterPack()) { | |||
5036 | assert(!getExpandedPackSize(*Param) &&(static_cast <bool> (!getExpandedPackSize(*Param) && "Should have dealt with this already") ? void (0) : __assert_fail ("!getExpandedPackSize(*Param) && \"Should have dealt with this already\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 5037, __extension__ __PRETTY_FUNCTION__)) | |||
5037 | "Should have dealt with this already")(static_cast <bool> (!getExpandedPackSize(*Param) && "Should have dealt with this already") ? void (0) : __assert_fail ("!getExpandedPackSize(*Param) && \"Should have dealt with this already\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 5037, __extension__ __PRETTY_FUNCTION__)); | |||
5038 | ||||
5039 | // A non-expanded parameter pack before the end of the parameter list | |||
5040 | // only occurs for an ill-formed template parameter list, unless we've | |||
5041 | // got a partial argument list for a function template, so just bail out. | |||
5042 | if (Param + 1 != ParamEnd) | |||
5043 | return true; | |||
5044 | ||||
5045 | Converted.push_back( | |||
5046 | TemplateArgument::CreatePackCopy(Context, ArgumentPack)); | |||
5047 | ArgumentPack.clear(); | |||
5048 | ||||
5049 | ++Param; | |||
5050 | continue; | |||
5051 | } | |||
5052 | ||||
5053 | // Check whether we have a default argument. | |||
5054 | TemplateArgumentLoc Arg; | |||
5055 | ||||
5056 | // Retrieve the default template argument from the template | |||
5057 | // parameter. For each kind of template parameter, we substitute the | |||
5058 | // template arguments provided thus far and any "outer" template arguments | |||
5059 | // (when the template parameter was part of a nested template) into | |||
5060 | // the default argument. | |||
5061 | if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*Param)) { | |||
5062 | if (!hasVisibleDefaultArgument(TTP)) | |||
5063 | return diagnoseMissingArgument(*this, TemplateLoc, Template, TTP, | |||
5064 | NewArgs); | |||
5065 | ||||
5066 | TypeSourceInfo *ArgType = SubstDefaultTemplateArgument(*this, | |||
5067 | Template, | |||
5068 | TemplateLoc, | |||
5069 | RAngleLoc, | |||
5070 | TTP, | |||
5071 | Converted); | |||
5072 | if (!ArgType) | |||
5073 | return true; | |||
5074 | ||||
5075 | Arg = TemplateArgumentLoc(TemplateArgument(ArgType->getType()), | |||
5076 | ArgType); | |||
5077 | } else if (NonTypeTemplateParmDecl *NTTP | |||
5078 | = dyn_cast<NonTypeTemplateParmDecl>(*Param)) { | |||
5079 | if (!hasVisibleDefaultArgument(NTTP)) | |||
5080 | return diagnoseMissingArgument(*this, TemplateLoc, Template, NTTP, | |||
5081 | NewArgs); | |||
5082 | ||||
5083 | ExprResult E = SubstDefaultTemplateArgument(*this, Template, | |||
5084 | TemplateLoc, | |||
5085 | RAngleLoc, | |||
5086 | NTTP, | |||
5087 | Converted); | |||
5088 | if (E.isInvalid()) | |||
5089 | return true; | |||
5090 | ||||
5091 | Expr *Ex = E.getAs<Expr>(); | |||
5092 | Arg = TemplateArgumentLoc(TemplateArgument(Ex), Ex); | |||
5093 | } else { | |||
5094 | TemplateTemplateParmDecl *TempParm | |||
5095 | = cast<TemplateTemplateParmDecl>(*Param); | |||
5096 | ||||
5097 | if (!hasVisibleDefaultArgument(TempParm)) | |||
5098 | return diagnoseMissingArgument(*this, TemplateLoc, Template, TempParm, | |||
5099 | NewArgs); | |||
5100 | ||||
5101 | NestedNameSpecifierLoc QualifierLoc; | |||
5102 | TemplateName Name = SubstDefaultTemplateArgument(*this, Template, | |||
5103 | TemplateLoc, | |||
5104 | RAngleLoc, | |||
5105 | TempParm, | |||
5106 | Converted, | |||
5107 | QualifierLoc); | |||
5108 | if (Name.isNull()) | |||
5109 | return true; | |||
5110 | ||||
5111 | Arg = TemplateArgumentLoc(TemplateArgument(Name), QualifierLoc, | |||
5112 | TempParm->getDefaultArgument().getTemplateNameLoc()); | |||
5113 | } | |||
5114 | ||||
5115 | // Introduce an instantiation record that describes where we are using | |||
5116 | // the default template argument. We're not actually instantiating a | |||
5117 | // template here, we just create this object to put a note into the | |||
5118 | // context stack. | |||
5119 | InstantiatingTemplate Inst(*this, RAngleLoc, Template, *Param, Converted, | |||
5120 | SourceRange(TemplateLoc, RAngleLoc)); | |||
5121 | if (Inst.isInvalid()) | |||
5122 | return true; | |||
5123 | ||||
5124 | // Check the default template argument. | |||
5125 | if (CheckTemplateArgument(*Param, Arg, Template, TemplateLoc, | |||
5126 | RAngleLoc, 0, Converted)) | |||
5127 | return true; | |||
5128 | ||||
5129 | // Core issue 150 (assumed resolution): if this is a template template | |||
5130 | // parameter, keep track of the default template arguments from the | |||
5131 | // template definition. | |||
5132 | if (isTemplateTemplateParameter) | |||
5133 | NewArgs.addArgument(Arg); | |||
5134 | ||||
5135 | // Move to the next template parameter and argument. | |||
5136 | ++Param; | |||
5137 | ++ArgIdx; | |||
5138 | } | |||
5139 | ||||
5140 | // If we're performing a partial argument substitution, allow any trailing | |||
5141 | // pack expansions; they might be empty. This can happen even if | |||
5142 | // PartialTemplateArgs is false (the list of arguments is complete but | |||
5143 | // still dependent). | |||
5144 | if (ArgIdx < NumArgs && CurrentInstantiationScope && | |||
5145 | CurrentInstantiationScope->getPartiallySubstitutedPack()) { | |||
5146 | while (ArgIdx < NumArgs && NewArgs[ArgIdx].getArgument().isPackExpansion()) | |||
5147 | Converted.push_back(NewArgs[ArgIdx++].getArgument()); | |||
5148 | } | |||
5149 | ||||
5150 | // If we have any leftover arguments, then there were too many arguments. | |||
5151 | // Complain and fail. | |||
5152 | if (ArgIdx < NumArgs) | |||
5153 | return diagnoseArityMismatch(*this, Template, TemplateLoc, NewArgs); | |||
5154 | ||||
5155 | // No problems found with the new argument list, propagate changes back | |||
5156 | // to caller. | |||
5157 | if (UpdateArgsWithConversions) | |||
5158 | TemplateArgs = std::move(NewArgs); | |||
5159 | ||||
5160 | return false; | |||
5161 | } | |||
5162 | ||||
5163 | namespace { | |||
5164 | class UnnamedLocalNoLinkageFinder | |||
5165 | : public TypeVisitor<UnnamedLocalNoLinkageFinder, bool> | |||
5166 | { | |||
5167 | Sema &S; | |||
5168 | SourceRange SR; | |||
5169 | ||||
5170 | typedef TypeVisitor<UnnamedLocalNoLinkageFinder, bool> inherited; | |||
5171 | ||||
5172 | public: | |||
5173 | UnnamedLocalNoLinkageFinder(Sema &S, SourceRange SR) : S(S), SR(SR) { } | |||
5174 | ||||
5175 | bool Visit(QualType T) { | |||
5176 | return T.isNull() ? false : inherited::Visit(T.getTypePtr()); | |||
5177 | } | |||
5178 | ||||
5179 | #define TYPE(Class, Parent) \ | |||
5180 | bool Visit##Class##Type(const Class##Type *); | |||
5181 | #define ABSTRACT_TYPE(Class, Parent) \ | |||
5182 | bool Visit##Class##Type(const Class##Type *) { return false; } | |||
5183 | #define NON_CANONICAL_TYPE(Class, Parent) \ | |||
5184 | bool Visit##Class##Type(const Class##Type *) { return false; } | |||
5185 | #include "clang/AST/TypeNodes.def" | |||
5186 | ||||
5187 | bool VisitTagDecl(const TagDecl *Tag); | |||
5188 | bool VisitNestedNameSpecifier(NestedNameSpecifier *NNS); | |||
5189 | }; | |||
5190 | } // end anonymous namespace | |||
5191 | ||||
5192 | bool UnnamedLocalNoLinkageFinder::VisitBuiltinType(const BuiltinType*) { | |||
5193 | return false; | |||
5194 | } | |||
5195 | ||||
5196 | bool UnnamedLocalNoLinkageFinder::VisitComplexType(const ComplexType* T) { | |||
5197 | return Visit(T->getElementType()); | |||
5198 | } | |||
5199 | ||||
5200 | bool UnnamedLocalNoLinkageFinder::VisitPointerType(const PointerType* T) { | |||
5201 | return Visit(T->getPointeeType()); | |||
5202 | } | |||
5203 | ||||
5204 | bool UnnamedLocalNoLinkageFinder::VisitBlockPointerType( | |||
5205 | const BlockPointerType* T) { | |||
5206 | return Visit(T->getPointeeType()); | |||
5207 | } | |||
5208 | ||||
5209 | bool UnnamedLocalNoLinkageFinder::VisitLValueReferenceType( | |||
5210 | const LValueReferenceType* T) { | |||
5211 | return Visit(T->getPointeeType()); | |||
5212 | } | |||
5213 | ||||
5214 | bool UnnamedLocalNoLinkageFinder::VisitRValueReferenceType( | |||
5215 | const RValueReferenceType* T) { | |||
5216 | return Visit(T->getPointeeType()); | |||
5217 | } | |||
5218 | ||||
5219 | bool UnnamedLocalNoLinkageFinder::VisitMemberPointerType( | |||
5220 | const MemberPointerType* T) { | |||
5221 | return Visit(T->getPointeeType()) || Visit(QualType(T->getClass(), 0)); | |||
5222 | } | |||
5223 | ||||
5224 | bool UnnamedLocalNoLinkageFinder::VisitConstantArrayType( | |||
5225 | const ConstantArrayType* T) { | |||
5226 | return Visit(T->getElementType()); | |||
5227 | } | |||
5228 | ||||
5229 | bool UnnamedLocalNoLinkageFinder::VisitIncompleteArrayType( | |||
5230 | const IncompleteArrayType* T) { | |||
5231 | return Visit(T->getElementType()); | |||
5232 | } | |||
5233 | ||||
5234 | bool UnnamedLocalNoLinkageFinder::VisitVariableArrayType( | |||
5235 | const VariableArrayType* T) { | |||
5236 | return Visit(T->getElementType()); | |||
5237 | } | |||
5238 | ||||
5239 | bool UnnamedLocalNoLinkageFinder::VisitDependentSizedArrayType( | |||
5240 | const DependentSizedArrayType* T) { | |||
5241 | return Visit(T->getElementType()); | |||
5242 | } | |||
5243 | ||||
5244 | bool UnnamedLocalNoLinkageFinder::VisitDependentSizedExtVectorType( | |||
5245 | const DependentSizedExtVectorType* T) { | |||
5246 | return Visit(T->getElementType()); | |||
5247 | } | |||
5248 | ||||
5249 | bool UnnamedLocalNoLinkageFinder::VisitDependentAddressSpaceType( | |||
5250 | const DependentAddressSpaceType *T) { | |||
5251 | return Visit(T->getPointeeType()); | |||
5252 | } | |||
5253 | ||||
5254 | bool UnnamedLocalNoLinkageFinder::VisitVectorType(const VectorType* T) { | |||
5255 | return Visit(T->getElementType()); | |||
5256 | } | |||
5257 | ||||
5258 | bool UnnamedLocalNoLinkageFinder::VisitExtVectorType(const ExtVectorType* T) { | |||
5259 | return Visit(T->getElementType()); | |||
5260 | } | |||
5261 | ||||
5262 | bool UnnamedLocalNoLinkageFinder::VisitFunctionProtoType( | |||
5263 | const FunctionProtoType* T) { | |||
5264 | for (const auto &A : T->param_types()) { | |||
5265 | if (Visit(A)) | |||
5266 | return true; | |||
5267 | } | |||
5268 | ||||
5269 | return Visit(T->getReturnType()); | |||
5270 | } | |||
5271 | ||||
5272 | bool UnnamedLocalNoLinkageFinder::VisitFunctionNoProtoType( | |||
5273 | const FunctionNoProtoType* T) { | |||
5274 | return Visit(T->getReturnType()); | |||
5275 | } | |||
5276 | ||||
5277 | bool UnnamedLocalNoLinkageFinder::VisitUnresolvedUsingType( | |||
5278 | const UnresolvedUsingType*) { | |||
5279 | return false; | |||
5280 | } | |||
5281 | ||||
5282 | bool UnnamedLocalNoLinkageFinder::VisitTypeOfExprType(const TypeOfExprType*) { | |||
5283 | return false; | |||
5284 | } | |||
5285 | ||||
5286 | bool UnnamedLocalNoLinkageFinder::VisitTypeOfType(const TypeOfType* T) { | |||
5287 | return Visit(T->getUnderlyingType()); | |||
5288 | } | |||
5289 | ||||
5290 | bool UnnamedLocalNoLinkageFinder::VisitDecltypeType(const DecltypeType*) { | |||
5291 | return false; | |||
5292 | } | |||
5293 | ||||
5294 | bool UnnamedLocalNoLinkageFinder::VisitUnaryTransformType( | |||
5295 | const UnaryTransformType*) { | |||
5296 | return false; | |||
5297 | } | |||
5298 | ||||
5299 | bool UnnamedLocalNoLinkageFinder::VisitAutoType(const AutoType *T) { | |||
5300 | return Visit(T->getDeducedType()); | |||
5301 | } | |||
5302 | ||||
5303 | bool UnnamedLocalNoLinkageFinder::VisitDeducedTemplateSpecializationType( | |||
5304 | const DeducedTemplateSpecializationType *T) { | |||
5305 | return Visit(T->getDeducedType()); | |||
5306 | } | |||
5307 | ||||
5308 | bool UnnamedLocalNoLinkageFinder::VisitRecordType(const RecordType* T) { | |||
5309 | return VisitTagDecl(T->getDecl()); | |||
5310 | } | |||
5311 | ||||
5312 | bool UnnamedLocalNoLinkageFinder::VisitEnumType(const EnumType* T) { | |||
5313 | return VisitTagDecl(T->getDecl()); | |||
5314 | } | |||
5315 | ||||
5316 | bool UnnamedLocalNoLinkageFinder::VisitTemplateTypeParmType( | |||
5317 | const TemplateTypeParmType*) { | |||
5318 | return false; | |||
5319 | } | |||
5320 | ||||
5321 | bool UnnamedLocalNoLinkageFinder::VisitSubstTemplateTypeParmPackType( | |||
5322 | const SubstTemplateTypeParmPackType *) { | |||
5323 | return false; | |||
5324 | } | |||
5325 | ||||
5326 | bool UnnamedLocalNoLinkageFinder::VisitTemplateSpecializationType( | |||
5327 | const TemplateSpecializationType*) { | |||
5328 | return false; | |||
5329 | } | |||
5330 | ||||
5331 | bool UnnamedLocalNoLinkageFinder::VisitInjectedClassNameType( | |||
5332 | const InjectedClassNameType* T) { | |||
5333 | return VisitTagDecl(T->getDecl()); | |||
5334 | } | |||
5335 | ||||
5336 | bool UnnamedLocalNoLinkageFinder::VisitDependentNameType( | |||
5337 | const DependentNameType* T) { | |||
5338 | return VisitNestedNameSpecifier(T->getQualifier()); | |||
5339 | } | |||
5340 | ||||
5341 | bool UnnamedLocalNoLinkageFinder::VisitDependentTemplateSpecializationType( | |||
5342 | const DependentTemplateSpecializationType* T) { | |||
5343 | return VisitNestedNameSpecifier(T->getQualifier()); | |||
5344 | } | |||
5345 | ||||
5346 | bool UnnamedLocalNoLinkageFinder::VisitPackExpansionType( | |||
5347 | const PackExpansionType* T) { | |||
5348 | return Visit(T->getPattern()); | |||
5349 | } | |||
5350 | ||||
5351 | bool UnnamedLocalNoLinkageFinder::VisitObjCObjectType(const ObjCObjectType *) { | |||
5352 | return false; | |||
5353 | } | |||
5354 | ||||
5355 | bool UnnamedLocalNoLinkageFinder::VisitObjCInterfaceType( | |||
5356 | const ObjCInterfaceType *) { | |||
5357 | return false; | |||
5358 | } | |||
5359 | ||||
5360 | bool UnnamedLocalNoLinkageFinder::VisitObjCObjectPointerType( | |||
5361 | const ObjCObjectPointerType *) { | |||
5362 | return false; | |||
5363 | } | |||
5364 | ||||
5365 | bool UnnamedLocalNoLinkageFinder::VisitAtomicType(const AtomicType* T) { | |||
5366 | return Visit(T->getValueType()); | |||
5367 | } | |||
5368 | ||||
5369 | bool UnnamedLocalNoLinkageFinder::VisitPipeType(const PipeType* T) { | |||
5370 | return false; | |||
5371 | } | |||
5372 | ||||
5373 | bool UnnamedLocalNoLinkageFinder::VisitTagDecl(const TagDecl *Tag) { | |||
5374 | if (Tag->getDeclContext()->isFunctionOrMethod()) { | |||
5375 | S.Diag(SR.getBegin(), | |||
5376 | S.getLangOpts().CPlusPlus11 ? | |||
5377 | diag::warn_cxx98_compat_template_arg_local_type : | |||
5378 | diag::ext_template_arg_local_type) | |||
5379 | << S.Context.getTypeDeclType(Tag) << SR; | |||
5380 | return true; | |||
5381 | } | |||
5382 | ||||
5383 | if (!Tag->hasNameForLinkage()) { | |||
5384 | S.Diag(SR.getBegin(), | |||
5385 | S.getLangOpts().CPlusPlus11 ? | |||
5386 | diag::warn_cxx98_compat_template_arg_unnamed_type : | |||
5387 | diag::ext_template_arg_unnamed_type) << SR; | |||
5388 | S.Diag(Tag->getLocation(), diag::note_template_unnamed_type_here); | |||
5389 | return true; | |||
5390 | } | |||
5391 | ||||
5392 | return false; | |||
5393 | } | |||
5394 | ||||
5395 | bool UnnamedLocalNoLinkageFinder::VisitNestedNameSpecifier( | |||
5396 | NestedNameSpecifier *NNS) { | |||
5397 | if (NNS->getPrefix() && VisitNestedNameSpecifier(NNS->getPrefix())) | |||
5398 | return true; | |||
5399 | ||||
5400 | switch (NNS->getKind()) { | |||
5401 | case NestedNameSpecifier::Identifier: | |||
5402 | case NestedNameSpecifier::Namespace: | |||
5403 | case NestedNameSpecifier::NamespaceAlias: | |||
5404 | case NestedNameSpecifier::Global: | |||
5405 | case NestedNameSpecifier::Super: | |||
5406 | return false; | |||
5407 | ||||
5408 | case NestedNameSpecifier::TypeSpec: | |||
5409 | case NestedNameSpecifier::TypeSpecWithTemplate: | |||
5410 | return Visit(QualType(NNS->getAsType(), 0)); | |||
5411 | } | |||
5412 | llvm_unreachable("Invalid NestedNameSpecifier::Kind!")::llvm::llvm_unreachable_internal("Invalid NestedNameSpecifier::Kind!" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 5412); | |||
5413 | } | |||
5414 | ||||
5415 | /// \brief Check a template argument against its corresponding | |||
5416 | /// template type parameter. | |||
5417 | /// | |||
5418 | /// This routine implements the semantics of C++ [temp.arg.type]. It | |||
5419 | /// returns true if an error occurred, and false otherwise. | |||
5420 | bool Sema::CheckTemplateArgument(TemplateTypeParmDecl *Param, | |||
5421 | TypeSourceInfo *ArgInfo) { | |||
5422 | assert(ArgInfo && "invalid TypeSourceInfo")(static_cast <bool> (ArgInfo && "invalid TypeSourceInfo" ) ? void (0) : __assert_fail ("ArgInfo && \"invalid TypeSourceInfo\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 5422, __extension__ __PRETTY_FUNCTION__)); | |||
5423 | QualType Arg = ArgInfo->getType(); | |||
5424 | SourceRange SR = ArgInfo->getTypeLoc().getSourceRange(); | |||
5425 | ||||
5426 | if (Arg->isVariablyModifiedType()) { | |||
5427 | return Diag(SR.getBegin(), diag::err_variably_modified_template_arg) << Arg; | |||
5428 | } else if (Context.hasSameUnqualifiedType(Arg, Context.OverloadTy)) { | |||
5429 | return Diag(SR.getBegin(), diag::err_template_arg_overload_type) << SR; | |||
5430 | } | |||
5431 | ||||
5432 | // C++03 [temp.arg.type]p2: | |||
5433 | // A local type, a type with no linkage, an unnamed type or a type | |||
5434 | // compounded from any of these types shall not be used as a | |||
5435 | // template-argument for a template type-parameter. | |||
5436 | // | |||
5437 | // C++11 allows these, and even in C++03 we allow them as an extension with | |||
5438 | // a warning. | |||
5439 | if (LangOpts.CPlusPlus11 || Arg->hasUnnamedOrLocalType()) { | |||
5440 | UnnamedLocalNoLinkageFinder Finder(*this, SR); | |||
5441 | (void)Finder.Visit(Context.getCanonicalType(Arg)); | |||
5442 | } | |||
5443 | ||||
5444 | return false; | |||
5445 | } | |||
5446 | ||||
5447 | enum NullPointerValueKind { | |||
5448 | NPV_NotNullPointer, | |||
5449 | NPV_NullPointer, | |||
5450 | NPV_Error | |||
5451 | }; | |||
5452 | ||||
5453 | /// \brief Determine whether the given template argument is a null pointer | |||
5454 | /// value of the appropriate type. | |||
5455 | static NullPointerValueKind | |||
5456 | isNullPointerValueTemplateArgument(Sema &S, NonTypeTemplateParmDecl *Param, | |||
5457 | QualType ParamType, Expr *Arg, | |||
5458 | Decl *Entity = nullptr) { | |||
5459 | if (Arg->isValueDependent() || Arg->isTypeDependent()) | |||
5460 | return NPV_NotNullPointer; | |||
5461 | ||||
5462 | // dllimport'd entities aren't constant but are available inside of template | |||
5463 | // arguments. | |||
5464 | if (Entity && Entity->hasAttr<DLLImportAttr>()) | |||
5465 | return NPV_NotNullPointer; | |||
5466 | ||||
5467 | if (!S.isCompleteType(Arg->getExprLoc(), ParamType)) | |||
5468 | llvm_unreachable(::llvm::llvm_unreachable_internal("Incomplete parameter type in isNullPointerValueTemplateArgument!" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 5469) | |||
5469 | "Incomplete parameter type in isNullPointerValueTemplateArgument!")::llvm::llvm_unreachable_internal("Incomplete parameter type in isNullPointerValueTemplateArgument!" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 5469); | |||
5470 | ||||
5471 | if (!S.getLangOpts().CPlusPlus11) | |||
5472 | return NPV_NotNullPointer; | |||
5473 | ||||
5474 | // Determine whether we have a constant expression. | |||
5475 | ExprResult ArgRV = S.DefaultFunctionArrayConversion(Arg); | |||
5476 | if (ArgRV.isInvalid()) | |||
5477 | return NPV_Error; | |||
5478 | Arg = ArgRV.get(); | |||
5479 | ||||
5480 | Expr::EvalResult EvalResult; | |||
5481 | SmallVector<PartialDiagnosticAt, 8> Notes; | |||
5482 | EvalResult.Diag = &Notes; | |||
5483 | if (!Arg->EvaluateAsRValue(EvalResult, S.Context) || | |||
5484 | EvalResult.HasSideEffects) { | |||
5485 | SourceLocation DiagLoc = Arg->getExprLoc(); | |||
5486 | ||||
5487 | // If our only note is the usual "invalid subexpression" note, just point | |||
5488 | // the caret at its location rather than producing an essentially | |||
5489 | // redundant note. | |||
5490 | if (Notes.size() == 1 && Notes[0].second.getDiagID() == | |||
5491 | diag::note_invalid_subexpr_in_const_expr) { | |||
5492 | DiagLoc = Notes[0].first; | |||
5493 | Notes.clear(); | |||
5494 | } | |||
5495 | ||||
5496 | S.Diag(DiagLoc, diag::err_template_arg_not_address_constant) | |||
5497 | << Arg->getType() << Arg->getSourceRange(); | |||
5498 | for (unsigned I = 0, N = Notes.size(); I != N; ++I) | |||
5499 | S.Diag(Notes[I].first, Notes[I].second); | |||
5500 | ||||
5501 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
5502 | return NPV_Error; | |||
5503 | } | |||
5504 | ||||
5505 | // C++11 [temp.arg.nontype]p1: | |||
5506 | // - an address constant expression of type std::nullptr_t | |||
5507 | if (Arg->getType()->isNullPtrType()) | |||
5508 | return NPV_NullPointer; | |||
5509 | ||||
5510 | // - a constant expression that evaluates to a null pointer value (4.10); or | |||
5511 | // - a constant expression that evaluates to a null member pointer value | |||
5512 | // (4.11); or | |||
5513 | if ((EvalResult.Val.isLValue() && !EvalResult.Val.getLValueBase()) || | |||
5514 | (EvalResult.Val.isMemberPointer() && | |||
5515 | !EvalResult.Val.getMemberPointerDecl())) { | |||
5516 | // If our expression has an appropriate type, we've succeeded. | |||
5517 | bool ObjCLifetimeConversion; | |||
5518 | if (S.Context.hasSameUnqualifiedType(Arg->getType(), ParamType) || | |||
5519 | S.IsQualificationConversion(Arg->getType(), ParamType, false, | |||
5520 | ObjCLifetimeConversion)) | |||
5521 | return NPV_NullPointer; | |||
5522 | ||||
5523 | // The types didn't match, but we know we got a null pointer; complain, | |||
5524 | // then recover as if the types were correct. | |||
5525 | S.Diag(Arg->getExprLoc(), diag::err_template_arg_wrongtype_null_constant) | |||
5526 | << Arg->getType() << ParamType << Arg->getSourceRange(); | |||
5527 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
5528 | return NPV_NullPointer; | |||
5529 | } | |||
5530 | ||||
5531 | // If we don't have a null pointer value, but we do have a NULL pointer | |||
5532 | // constant, suggest a cast to the appropriate type. | |||
5533 | if (Arg->isNullPointerConstant(S.Context, Expr::NPC_NeverValueDependent)) { | |||
5534 | std::string Code = "static_cast<" + ParamType.getAsString() + ">("; | |||
5535 | S.Diag(Arg->getExprLoc(), diag::err_template_arg_untyped_null_constant) | |||
5536 | << ParamType << FixItHint::CreateInsertion(Arg->getLocStart(), Code) | |||
5537 | << FixItHint::CreateInsertion(S.getLocForEndOfToken(Arg->getLocEnd()), | |||
5538 | ")"); | |||
5539 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
5540 | return NPV_NullPointer; | |||
5541 | } | |||
5542 | ||||
5543 | // FIXME: If we ever want to support general, address-constant expressions | |||
5544 | // as non-type template arguments, we should return the ExprResult here to | |||
5545 | // be interpreted by the caller. | |||
5546 | return NPV_NotNullPointer; | |||
5547 | } | |||
5548 | ||||
5549 | /// \brief Checks whether the given template argument is compatible with its | |||
5550 | /// template parameter. | |||
5551 | static bool CheckTemplateArgumentIsCompatibleWithParameter( | |||
5552 | Sema &S, NonTypeTemplateParmDecl *Param, QualType ParamType, Expr *ArgIn, | |||
5553 | Expr *Arg, QualType ArgType) { | |||
5554 | bool ObjCLifetimeConversion; | |||
5555 | if (ParamType->isPointerType() && | |||
5556 | !ParamType->getAs<PointerType>()->getPointeeType()->isFunctionType() && | |||
5557 | S.IsQualificationConversion(ArgType, ParamType, false, | |||
5558 | ObjCLifetimeConversion)) { | |||
5559 | // For pointer-to-object types, qualification conversions are | |||
5560 | // permitted. | |||
5561 | } else { | |||
5562 | if (const ReferenceType *ParamRef = ParamType->getAs<ReferenceType>()) { | |||
5563 | if (!ParamRef->getPointeeType()->isFunctionType()) { | |||
5564 | // C++ [temp.arg.nontype]p5b3: | |||
5565 | // For a non-type template-parameter of type reference to | |||
5566 | // object, no conversions apply. The type referred to by the | |||
5567 | // reference may be more cv-qualified than the (otherwise | |||
5568 | // identical) type of the template- argument. The | |||
5569 | // template-parameter is bound directly to the | |||
5570 | // template-argument, which shall be an lvalue. | |||
5571 | ||||
5572 | // FIXME: Other qualifiers? | |||
5573 | unsigned ParamQuals = ParamRef->getPointeeType().getCVRQualifiers(); | |||
5574 | unsigned ArgQuals = ArgType.getCVRQualifiers(); | |||
5575 | ||||
5576 | if ((ParamQuals | ArgQuals) != ParamQuals) { | |||
5577 | S.Diag(Arg->getLocStart(), | |||
5578 | diag::err_template_arg_ref_bind_ignores_quals) | |||
5579 | << ParamType << Arg->getType() << Arg->getSourceRange(); | |||
5580 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
5581 | return true; | |||
5582 | } | |||
5583 | } | |||
5584 | } | |||
5585 | ||||
5586 | // At this point, the template argument refers to an object or | |||
5587 | // function with external linkage. We now need to check whether the | |||
5588 | // argument and parameter types are compatible. | |||
5589 | if (!S.Context.hasSameUnqualifiedType(ArgType, | |||
5590 | ParamType.getNonReferenceType())) { | |||
5591 | // We can't perform this conversion or binding. | |||
5592 | if (ParamType->isReferenceType()) | |||
5593 | S.Diag(Arg->getLocStart(), diag::err_template_arg_no_ref_bind) | |||
5594 | << ParamType << ArgIn->getType() << Arg->getSourceRange(); | |||
5595 | else | |||
5596 | S.Diag(Arg->getLocStart(), diag::err_template_arg_not_convertible) | |||
5597 | << ArgIn->getType() << ParamType << Arg->getSourceRange(); | |||
5598 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
5599 | return true; | |||
5600 | } | |||
5601 | } | |||
5602 | ||||
5603 | return false; | |||
5604 | } | |||
5605 | ||||
5606 | /// \brief Checks whether the given template argument is the address | |||
5607 | /// of an object or function according to C++ [temp.arg.nontype]p1. | |||
5608 | static bool | |||
5609 | CheckTemplateArgumentAddressOfObjectOrFunction(Sema &S, | |||
5610 | NonTypeTemplateParmDecl *Param, | |||
5611 | QualType ParamType, | |||
5612 | Expr *ArgIn, | |||
5613 | TemplateArgument &Converted) { | |||
5614 | bool Invalid = false; | |||
5615 | Expr *Arg = ArgIn; | |||
5616 | QualType ArgType = Arg->getType(); | |||
5617 | ||||
5618 | bool AddressTaken = false; | |||
5619 | SourceLocation AddrOpLoc; | |||
5620 | if (S.getLangOpts().MicrosoftExt) { | |||
5621 | // Microsoft Visual C++ strips all casts, allows an arbitrary number of | |||
5622 | // dereference and address-of operators. | |||
5623 | Arg = Arg->IgnoreParenCasts(); | |||
5624 | ||||
5625 | bool ExtWarnMSTemplateArg = false; | |||
5626 | UnaryOperatorKind FirstOpKind; | |||
5627 | SourceLocation FirstOpLoc; | |||
5628 | while (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(Arg)) { | |||
5629 | UnaryOperatorKind UnOpKind = UnOp->getOpcode(); | |||
5630 | if (UnOpKind == UO_Deref) | |||
5631 | ExtWarnMSTemplateArg = true; | |||
5632 | if (UnOpKind == UO_AddrOf || UnOpKind == UO_Deref) { | |||
5633 | Arg = UnOp->getSubExpr()->IgnoreParenCasts(); | |||
5634 | if (!AddrOpLoc.isValid()) { | |||
5635 | FirstOpKind = UnOpKind; | |||
5636 | FirstOpLoc = UnOp->getOperatorLoc(); | |||
5637 | } | |||
5638 | } else | |||
5639 | break; | |||
5640 | } | |||
5641 | if (FirstOpLoc.isValid()) { | |||
5642 | if (ExtWarnMSTemplateArg) | |||
5643 | S.Diag(ArgIn->getLocStart(), diag::ext_ms_deref_template_argument) | |||
5644 | << ArgIn->getSourceRange(); | |||
5645 | ||||
5646 | if (FirstOpKind == UO_AddrOf) | |||
5647 | AddressTaken = true; | |||
5648 | else if (Arg->getType()->isPointerType()) { | |||
5649 | // We cannot let pointers get dereferenced here, that is obviously not a | |||
5650 | // constant expression. | |||
5651 | assert(FirstOpKind == UO_Deref)(static_cast <bool> (FirstOpKind == UO_Deref) ? void (0 ) : __assert_fail ("FirstOpKind == UO_Deref", "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 5651, __extension__ __PRETTY_FUNCTION__)); | |||
5652 | S.Diag(Arg->getLocStart(), diag::err_template_arg_not_decl_ref) | |||
5653 | << Arg->getSourceRange(); | |||
5654 | } | |||
5655 | } | |||
5656 | } else { | |||
5657 | // See through any implicit casts we added to fix the type. | |||
5658 | Arg = Arg->IgnoreImpCasts(); | |||
5659 | ||||
5660 | // C++ [temp.arg.nontype]p1: | |||
5661 | // | |||
5662 | // A template-argument for a non-type, non-template | |||
5663 | // template-parameter shall be one of: [...] | |||
5664 | // | |||
5665 | // -- the address of an object or function with external | |||
5666 | // linkage, including function templates and function | |||
5667 | // template-ids but excluding non-static class members, | |||
5668 | // expressed as & id-expression where the & is optional if | |||
5669 | // the name refers to a function or array, or if the | |||
5670 | // corresponding template-parameter is a reference; or | |||
5671 | ||||
5672 | // In C++98/03 mode, give an extension warning on any extra parentheses. | |||
5673 | // See http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#773 | |||
5674 | bool ExtraParens = false; | |||
5675 | while (ParenExpr *Parens = dyn_cast<ParenExpr>(Arg)) { | |||
5676 | if (!Invalid && !ExtraParens) { | |||
5677 | S.Diag(Arg->getLocStart(), | |||
5678 | S.getLangOpts().CPlusPlus11 | |||
5679 | ? diag::warn_cxx98_compat_template_arg_extra_parens | |||
5680 | : diag::ext_template_arg_extra_parens) | |||
5681 | << Arg->getSourceRange(); | |||
5682 | ExtraParens = true; | |||
5683 | } | |||
5684 | ||||
5685 | Arg = Parens->getSubExpr(); | |||
5686 | } | |||
5687 | ||||
5688 | while (SubstNonTypeTemplateParmExpr *subst = | |||
5689 | dyn_cast<SubstNonTypeTemplateParmExpr>(Arg)) | |||
5690 | Arg = subst->getReplacement()->IgnoreImpCasts(); | |||
5691 | ||||
5692 | if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(Arg)) { | |||
5693 | if (UnOp->getOpcode() == UO_AddrOf) { | |||
5694 | Arg = UnOp->getSubExpr(); | |||
5695 | AddressTaken = true; | |||
5696 | AddrOpLoc = UnOp->getOperatorLoc(); | |||
5697 | } | |||
5698 | } | |||
5699 | ||||
5700 | while (SubstNonTypeTemplateParmExpr *subst = | |||
5701 | dyn_cast<SubstNonTypeTemplateParmExpr>(Arg)) | |||
5702 | Arg = subst->getReplacement()->IgnoreImpCasts(); | |||
5703 | } | |||
5704 | ||||
5705 | DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Arg); | |||
5706 | ValueDecl *Entity = DRE ? DRE->getDecl() : nullptr; | |||
5707 | ||||
5708 | // If our parameter has pointer type, check for a null template value. | |||
5709 | if (ParamType->isPointerType() || ParamType->isNullPtrType()) { | |||
5710 | switch (isNullPointerValueTemplateArgument(S, Param, ParamType, ArgIn, | |||
5711 | Entity)) { | |||
5712 | case NPV_NullPointer: | |||
5713 | S.Diag(Arg->getExprLoc(), diag::warn_cxx98_compat_template_arg_null); | |||
5714 | Converted = TemplateArgument(S.Context.getCanonicalType(ParamType), | |||
5715 | /*isNullPtr=*/true); | |||
5716 | return false; | |||
5717 | ||||
5718 | case NPV_Error: | |||
5719 | return true; | |||
5720 | ||||
5721 | case NPV_NotNullPointer: | |||
5722 | break; | |||
5723 | } | |||
5724 | } | |||
5725 | ||||
5726 | // Stop checking the precise nature of the argument if it is value dependent, | |||
5727 | // it should be checked when instantiated. | |||
5728 | if (Arg->isValueDependent()) { | |||
5729 | Converted = TemplateArgument(ArgIn); | |||
5730 | return false; | |||
5731 | } | |||
5732 | ||||
5733 | if (isa<CXXUuidofExpr>(Arg)) { | |||
5734 | if (CheckTemplateArgumentIsCompatibleWithParameter(S, Param, ParamType, | |||
5735 | ArgIn, Arg, ArgType)) | |||
5736 | return true; | |||
5737 | ||||
5738 | Converted = TemplateArgument(ArgIn); | |||
5739 | return false; | |||
5740 | } | |||
5741 | ||||
5742 | if (!DRE) { | |||
5743 | S.Diag(Arg->getLocStart(), diag::err_template_arg_not_decl_ref) | |||
5744 | << Arg->getSourceRange(); | |||
5745 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
5746 | return true; | |||
5747 | } | |||
5748 | ||||
5749 | // Cannot refer to non-static data members | |||
5750 | if (isa<FieldDecl>(Entity) || isa<IndirectFieldDecl>(Entity)) { | |||
5751 | S.Diag(Arg->getLocStart(), diag::err_template_arg_field) | |||
5752 | << Entity << Arg->getSourceRange(); | |||
5753 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
5754 | return true; | |||
5755 | } | |||
5756 | ||||
5757 | // Cannot refer to non-static member functions | |||
5758 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(Entity)) { | |||
5759 | if (!Method->isStatic()) { | |||
5760 | S.Diag(Arg->getLocStart(), diag::err_template_arg_method) | |||
5761 | << Method << Arg->getSourceRange(); | |||
5762 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
5763 | return true; | |||
5764 | } | |||
5765 | } | |||
5766 | ||||
5767 | FunctionDecl *Func = dyn_cast<FunctionDecl>(Entity); | |||
5768 | VarDecl *Var = dyn_cast<VarDecl>(Entity); | |||
5769 | ||||
5770 | // A non-type template argument must refer to an object or function. | |||
5771 | if (!Func && !Var) { | |||
5772 | // We found something, but we don't know specifically what it is. | |||
5773 | S.Diag(Arg->getLocStart(), diag::err_template_arg_not_object_or_func) | |||
5774 | << Arg->getSourceRange(); | |||
5775 | S.Diag(DRE->getDecl()->getLocation(), diag::note_template_arg_refers_here); | |||
5776 | return true; | |||
5777 | } | |||
5778 | ||||
5779 | // Address / reference template args must have external linkage in C++98. | |||
5780 | if (Entity->getFormalLinkage() == InternalLinkage) { | |||
5781 | S.Diag(Arg->getLocStart(), S.getLangOpts().CPlusPlus11 ? | |||
5782 | diag::warn_cxx98_compat_template_arg_object_internal : | |||
5783 | diag::ext_template_arg_object_internal) | |||
5784 | << !Func << Entity << Arg->getSourceRange(); | |||
5785 | S.Diag(Entity->getLocation(), diag::note_template_arg_internal_object) | |||
5786 | << !Func; | |||
5787 | } else if (!Entity->hasLinkage()) { | |||
5788 | S.Diag(Arg->getLocStart(), diag::err_template_arg_object_no_linkage) | |||
5789 | << !Func << Entity << Arg->getSourceRange(); | |||
5790 | S.Diag(Entity->getLocation(), diag::note_template_arg_internal_object) | |||
5791 | << !Func; | |||
5792 | return true; | |||
5793 | } | |||
5794 | ||||
5795 | if (Func) { | |||
5796 | // If the template parameter has pointer type, the function decays. | |||
5797 | if (ParamType->isPointerType() && !AddressTaken) | |||
5798 | ArgType = S.Context.getPointerType(Func->getType()); | |||
5799 | else if (AddressTaken && ParamType->isReferenceType()) { | |||
5800 | // If we originally had an address-of operator, but the | |||
5801 | // parameter has reference type, complain and (if things look | |||
5802 | // like they will work) drop the address-of operator. | |||
5803 | if (!S.Context.hasSameUnqualifiedType(Func->getType(), | |||
5804 | ParamType.getNonReferenceType())) { | |||
5805 | S.Diag(AddrOpLoc, diag::err_template_arg_address_of_non_pointer) | |||
5806 | << ParamType; | |||
5807 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
5808 | return true; | |||
5809 | } | |||
5810 | ||||
5811 | S.Diag(AddrOpLoc, diag::err_template_arg_address_of_non_pointer) | |||
5812 | << ParamType | |||
5813 | << FixItHint::CreateRemoval(AddrOpLoc); | |||
5814 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
5815 | ||||
5816 | ArgType = Func->getType(); | |||
5817 | } | |||
5818 | } else { | |||
5819 | // A value of reference type is not an object. | |||
5820 | if (Var->getType()->isReferenceType()) { | |||
5821 | S.Diag(Arg->getLocStart(), | |||
5822 | diag::err_template_arg_reference_var) | |||
5823 | << Var->getType() << Arg->getSourceRange(); | |||
5824 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
5825 | return true; | |||
5826 | } | |||
5827 | ||||
5828 | // A template argument must have static storage duration. | |||
5829 | if (Var->getTLSKind()) { | |||
5830 | S.Diag(Arg->getLocStart(), diag::err_template_arg_thread_local) | |||
5831 | << Arg->getSourceRange(); | |||
5832 | S.Diag(Var->getLocation(), diag::note_template_arg_refers_here); | |||
5833 | return true; | |||
5834 | } | |||
5835 | ||||
5836 | // If the template parameter has pointer type, we must have taken | |||
5837 | // the address of this object. | |||
5838 | if (ParamType->isReferenceType()) { | |||
5839 | if (AddressTaken) { | |||
5840 | // If we originally had an address-of operator, but the | |||
5841 | // parameter has reference type, complain and (if things look | |||
5842 | // like they will work) drop the address-of operator. | |||
5843 | if (!S.Context.hasSameUnqualifiedType(Var->getType(), | |||
5844 | ParamType.getNonReferenceType())) { | |||
5845 | S.Diag(AddrOpLoc, diag::err_template_arg_address_of_non_pointer) | |||
5846 | << ParamType; | |||
5847 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
5848 | return true; | |||
5849 | } | |||
5850 | ||||
5851 | S.Diag(AddrOpLoc, diag::err_template_arg_address_of_non_pointer) | |||
5852 | << ParamType | |||
5853 | << FixItHint::CreateRemoval(AddrOpLoc); | |||
5854 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
5855 | ||||
5856 | ArgType = Var->getType(); | |||
5857 | } | |||
5858 | } else if (!AddressTaken && ParamType->isPointerType()) { | |||
5859 | if (Var->getType()->isArrayType()) { | |||
5860 | // Array-to-pointer decay. | |||
5861 | ArgType = S.Context.getArrayDecayedType(Var->getType()); | |||
5862 | } else { | |||
5863 | // If the template parameter has pointer type but the address of | |||
5864 | // this object was not taken, complain and (possibly) recover by | |||
5865 | // taking the address of the entity. | |||
5866 | ArgType = S.Context.getPointerType(Var->getType()); | |||
5867 | if (!S.Context.hasSameUnqualifiedType(ArgType, ParamType)) { | |||
5868 | S.Diag(Arg->getLocStart(), diag::err_template_arg_not_address_of) | |||
5869 | << ParamType; | |||
5870 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
5871 | return true; | |||
5872 | } | |||
5873 | ||||
5874 | S.Diag(Arg->getLocStart(), diag::err_template_arg_not_address_of) | |||
5875 | << ParamType | |||
5876 | << FixItHint::CreateInsertion(Arg->getLocStart(), "&"); | |||
5877 | ||||
5878 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
5879 | } | |||
5880 | } | |||
5881 | } | |||
5882 | ||||
5883 | if (CheckTemplateArgumentIsCompatibleWithParameter(S, Param, ParamType, ArgIn, | |||
5884 | Arg, ArgType)) | |||
5885 | return true; | |||
5886 | ||||
5887 | // Create the template argument. | |||
5888 | Converted = | |||
5889 | TemplateArgument(cast<ValueDecl>(Entity->getCanonicalDecl()), ParamType); | |||
5890 | S.MarkAnyDeclReferenced(Arg->getLocStart(), Entity, false); | |||
5891 | return false; | |||
5892 | } | |||
5893 | ||||
5894 | /// \brief Checks whether the given template argument is a pointer to | |||
5895 | /// member constant according to C++ [temp.arg.nontype]p1. | |||
5896 | static bool CheckTemplateArgumentPointerToMember(Sema &S, | |||
5897 | NonTypeTemplateParmDecl *Param, | |||
5898 | QualType ParamType, | |||
5899 | Expr *&ResultArg, | |||
5900 | TemplateArgument &Converted) { | |||
5901 | bool Invalid = false; | |||
5902 | ||||
5903 | Expr *Arg = ResultArg; | |||
5904 | bool ObjCLifetimeConversion; | |||
5905 | ||||
5906 | // C++ [temp.arg.nontype]p1: | |||
5907 | // | |||
5908 | // A template-argument for a non-type, non-template | |||
5909 | // template-parameter shall be one of: [...] | |||
5910 | // | |||
5911 | // -- a pointer to member expressed as described in 5.3.1. | |||
5912 | DeclRefExpr *DRE = nullptr; | |||
5913 | ||||
5914 | // In C++98/03 mode, give an extension warning on any extra parentheses. | |||
5915 | // See http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#773 | |||
5916 | bool ExtraParens = false; | |||
5917 | while (ParenExpr *Parens = dyn_cast<ParenExpr>(Arg)) { | |||
5918 | if (!Invalid && !ExtraParens) { | |||
5919 | S.Diag(Arg->getLocStart(), | |||
5920 | S.getLangOpts().CPlusPlus11 ? | |||
5921 | diag::warn_cxx98_compat_template_arg_extra_parens : | |||
5922 | diag::ext_template_arg_extra_parens) | |||
5923 | << Arg->getSourceRange(); | |||
5924 | ExtraParens = true; | |||
5925 | } | |||
5926 | ||||
5927 | Arg = Parens->getSubExpr(); | |||
5928 | } | |||
5929 | ||||
5930 | while (SubstNonTypeTemplateParmExpr *subst = | |||
5931 | dyn_cast<SubstNonTypeTemplateParmExpr>(Arg)) | |||
5932 | Arg = subst->getReplacement()->IgnoreImpCasts(); | |||
5933 | ||||
5934 | // A pointer-to-member constant written &Class::member. | |||
5935 | if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(Arg)) { | |||
5936 | if (UnOp->getOpcode() == UO_AddrOf) { | |||
5937 | DRE = dyn_cast<DeclRefExpr>(UnOp->getSubExpr()); | |||
5938 | if (DRE && !DRE->getQualifier()) | |||
5939 | DRE = nullptr; | |||
5940 | } | |||
5941 | } | |||
5942 | // A constant of pointer-to-member type. | |||
5943 | else if ((DRE = dyn_cast<DeclRefExpr>(Arg))) { | |||
5944 | ValueDecl *VD = DRE->getDecl(); | |||
5945 | if (VD->getType()->isMemberPointerType()) { | |||
5946 | if (isa<NonTypeTemplateParmDecl>(VD)) { | |||
5947 | if (Arg->isTypeDependent() || Arg->isValueDependent()) { | |||
5948 | Converted = TemplateArgument(Arg); | |||
5949 | } else { | |||
5950 | VD = cast<ValueDecl>(VD->getCanonicalDecl()); | |||
5951 | Converted = TemplateArgument(VD, ParamType); | |||
5952 | } | |||
5953 | return Invalid; | |||
5954 | } | |||
5955 | } | |||
5956 | ||||
5957 | DRE = nullptr; | |||
5958 | } | |||
5959 | ||||
5960 | ValueDecl *Entity = DRE ? DRE->getDecl() : nullptr; | |||
5961 | ||||
5962 | // Check for a null pointer value. | |||
5963 | switch (isNullPointerValueTemplateArgument(S, Param, ParamType, ResultArg, | |||
5964 | Entity)) { | |||
5965 | case NPV_Error: | |||
5966 | return true; | |||
5967 | case NPV_NullPointer: | |||
5968 | S.Diag(ResultArg->getExprLoc(), diag::warn_cxx98_compat_template_arg_null); | |||
5969 | Converted = TemplateArgument(S.Context.getCanonicalType(ParamType), | |||
5970 | /*isNullPtr*/true); | |||
5971 | return false; | |||
5972 | case NPV_NotNullPointer: | |||
5973 | break; | |||
5974 | } | |||
5975 | ||||
5976 | if (S.IsQualificationConversion(ResultArg->getType(), | |||
5977 | ParamType.getNonReferenceType(), false, | |||
5978 | ObjCLifetimeConversion)) { | |||
5979 | ResultArg = S.ImpCastExprToType(ResultArg, ParamType, CK_NoOp, | |||
5980 | ResultArg->getValueKind()) | |||
5981 | .get(); | |||
5982 | } else if (!S.Context.hasSameUnqualifiedType( | |||
5983 | ResultArg->getType(), ParamType.getNonReferenceType())) { | |||
5984 | // We can't perform this conversion. | |||
5985 | S.Diag(ResultArg->getLocStart(), diag::err_template_arg_not_convertible) | |||
5986 | << ResultArg->getType() << ParamType << ResultArg->getSourceRange(); | |||
5987 | S.Diag(Param->getLocation(), diag::note_template_param_here); | |||
5988 | return true; | |||
5989 | } | |||
5990 | ||||
5991 | if (!DRE) | |||
5992 | return S.Diag(Arg->getLocStart(), | |||
5993 | diag::err_template_arg_not_pointer_to_member_form) | |||
5994 | << Arg->getSourceRange(); | |||
5995 | ||||
5996 | if (isa<FieldDecl>(DRE->getDecl()) || | |||
5997 | isa<IndirectFieldDecl>(DRE->getDecl()) || | |||
5998 | isa<CXXMethodDecl>(DRE->getDecl())) { | |||
5999 | assert((isa<FieldDecl>(DRE->getDecl()) ||(static_cast <bool> ((isa<FieldDecl>(DRE->getDecl ()) || isa<IndirectFieldDecl>(DRE->getDecl()) || !cast <CXXMethodDecl>(DRE->getDecl())->isStatic()) && "Only non-static member pointers can make it here") ? 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-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6002, __extension__ __PRETTY_FUNCTION__)) | |||
6000 | isa<IndirectFieldDecl>(DRE->getDecl()) ||(static_cast <bool> ((isa<FieldDecl>(DRE->getDecl ()) || isa<IndirectFieldDecl>(DRE->getDecl()) || !cast <CXXMethodDecl>(DRE->getDecl())->isStatic()) && "Only non-static member pointers can make it here") ? 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-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6002, __extension__ __PRETTY_FUNCTION__)) | |||
6001 | !cast<CXXMethodDecl>(DRE->getDecl())->isStatic()) &&(static_cast <bool> ((isa<FieldDecl>(DRE->getDecl ()) || isa<IndirectFieldDecl>(DRE->getDecl()) || !cast <CXXMethodDecl>(DRE->getDecl())->isStatic()) && "Only non-static member pointers can make it here") ? 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-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6002, __extension__ __PRETTY_FUNCTION__)) | |||
6002 | "Only non-static member pointers can make it here")(static_cast <bool> ((isa<FieldDecl>(DRE->getDecl ()) || isa<IndirectFieldDecl>(DRE->getDecl()) || !cast <CXXMethodDecl>(DRE->getDecl())->isStatic()) && "Only non-static member pointers can make it here") ? 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-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6002, __extension__ __PRETTY_FUNCTION__)); | |||
6003 | ||||
6004 | // Okay: this is the address of a non-static member, and therefore | |||
6005 | // a member pointer constant. | |||
6006 | if (Arg->isTypeDependent() || Arg->isValueDependent()) { | |||
6007 | Converted = TemplateArgument(Arg); | |||
6008 | } else { | |||
6009 | ValueDecl *D = cast<ValueDecl>(DRE->getDecl()->getCanonicalDecl()); | |||
6010 | Converted = TemplateArgument(D, ParamType); | |||
6011 | } | |||
6012 | return Invalid; | |||
6013 | } | |||
6014 | ||||
6015 | // We found something else, but we don't know specifically what it is. | |||
6016 | S.Diag(Arg->getLocStart(), | |||
6017 | diag::err_template_arg_not_pointer_to_member_form) | |||
6018 | << Arg->getSourceRange(); | |||
6019 | S.Diag(DRE->getDecl()->getLocation(), diag::note_template_arg_refers_here); | |||
6020 | return true; | |||
6021 | } | |||
6022 | ||||
6023 | /// \brief Check a template argument against its corresponding | |||
6024 | /// non-type template parameter. | |||
6025 | /// | |||
6026 | /// This routine implements the semantics of C++ [temp.arg.nontype]. | |||
6027 | /// If an error occurred, it returns ExprError(); otherwise, it | |||
6028 | /// returns the converted template argument. \p ParamType is the | |||
6029 | /// type of the non-type template parameter after it has been instantiated. | |||
6030 | ExprResult Sema::CheckTemplateArgument(NonTypeTemplateParmDecl *Param, | |||
6031 | QualType ParamType, Expr *Arg, | |||
6032 | TemplateArgument &Converted, | |||
6033 | CheckTemplateArgumentKind CTAK) { | |||
6034 | SourceLocation StartLoc = Arg->getLocStart(); | |||
6035 | ||||
6036 | // If the parameter type somehow involves auto, deduce the type now. | |||
6037 | if (getLangOpts().CPlusPlus17 && ParamType->isUndeducedType()) { | |||
6038 | // During template argument deduction, we allow 'decltype(auto)' to | |||
6039 | // match an arbitrary dependent argument. | |||
6040 | // FIXME: The language rules don't say what happens in this case. | |||
6041 | // FIXME: We get an opaque dependent type out of decltype(auto) if the | |||
6042 | // expression is merely instantiation-dependent; is this enough? | |||
6043 | if (CTAK == CTAK_Deduced && Arg->isTypeDependent()) { | |||
6044 | auto *AT = dyn_cast<AutoType>(ParamType); | |||
6045 | if (AT && AT->isDecltypeAuto()) { | |||
6046 | Converted = TemplateArgument(Arg); | |||
6047 | return Arg; | |||
6048 | } | |||
6049 | } | |||
6050 | ||||
6051 | // When checking a deduced template argument, deduce from its type even if | |||
6052 | // the type is dependent, in order to check the types of non-type template | |||
6053 | // arguments line up properly in partial ordering. | |||
6054 | Optional<unsigned> Depth; | |||
6055 | if (CTAK != CTAK_Specified) | |||
6056 | Depth = Param->getDepth() + 1; | |||
6057 | if (DeduceAutoType( | |||
6058 | Context.getTrivialTypeSourceInfo(ParamType, Param->getLocation()), | |||
6059 | Arg, ParamType, Depth) == DAR_Failed) { | |||
6060 | Diag(Arg->getExprLoc(), | |||
6061 | diag::err_non_type_template_parm_type_deduction_failure) | |||
6062 | << Param->getDeclName() << Param->getType() << Arg->getType() | |||
6063 | << Arg->getSourceRange(); | |||
6064 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
6065 | return ExprError(); | |||
6066 | } | |||
6067 | // CheckNonTypeTemplateParameterType will produce a diagnostic if there's | |||
6068 | // an error. The error message normally references the parameter | |||
6069 | // declaration, but here we'll pass the argument location because that's | |||
6070 | // where the parameter type is deduced. | |||
6071 | ParamType = CheckNonTypeTemplateParameterType(ParamType, Arg->getExprLoc()); | |||
6072 | if (ParamType.isNull()) { | |||
6073 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
6074 | return ExprError(); | |||
6075 | } | |||
6076 | } | |||
6077 | ||||
6078 | // We should have already dropped all cv-qualifiers by now. | |||
6079 | assert(!ParamType.hasQualifiers() &&(static_cast <bool> (!ParamType.hasQualifiers() && "non-type template parameter type cannot be qualified") ? void (0) : __assert_fail ("!ParamType.hasQualifiers() && \"non-type template parameter type cannot be qualified\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6080, __extension__ __PRETTY_FUNCTION__)) | |||
6080 | "non-type template parameter type cannot be qualified")(static_cast <bool> (!ParamType.hasQualifiers() && "non-type template parameter type cannot be qualified") ? void (0) : __assert_fail ("!ParamType.hasQualifiers() && \"non-type template parameter type cannot be qualified\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6080, __extension__ __PRETTY_FUNCTION__)); | |||
6081 | ||||
6082 | if (CTAK == CTAK_Deduced && | |||
6083 | !Context.hasSameType(ParamType.getNonLValueExprType(Context), | |||
6084 | Arg->getType())) { | |||
6085 | // FIXME: If either type is dependent, we skip the check. This isn't | |||
6086 | // correct, since during deduction we're supposed to have replaced each | |||
6087 | // template parameter with some unique (non-dependent) placeholder. | |||
6088 | // FIXME: If the argument type contains 'auto', we carry on and fail the | |||
6089 | // type check in order to force specific types to be more specialized than | |||
6090 | // 'auto'. It's not clear how partial ordering with 'auto' is supposed to | |||
6091 | // work. | |||
6092 | if ((ParamType->isDependentType() || Arg->isTypeDependent()) && | |||
6093 | !Arg->getType()->getContainedAutoType()) { | |||
6094 | Converted = TemplateArgument(Arg); | |||
6095 | return Arg; | |||
6096 | } | |||
6097 | // FIXME: This attempts to implement C++ [temp.deduct.type]p17. Per DR1770, | |||
6098 | // we should actually be checking the type of the template argument in P, | |||
6099 | // not the type of the template argument deduced from A, against the | |||
6100 | // template parameter type. | |||
6101 | Diag(StartLoc, diag::err_deduced_non_type_template_arg_type_mismatch) | |||
6102 | << Arg->getType() | |||
6103 | << ParamType.getUnqualifiedType(); | |||
6104 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
6105 | return ExprError(); | |||
6106 | } | |||
6107 | ||||
6108 | // If either the parameter has a dependent type or the argument is | |||
6109 | // type-dependent, there's nothing we can check now. | |||
6110 | if (ParamType->isDependentType() || Arg->isTypeDependent()) { | |||
6111 | // FIXME: Produce a cloned, canonical expression? | |||
6112 | Converted = TemplateArgument(Arg); | |||
6113 | return Arg; | |||
6114 | } | |||
6115 | ||||
6116 | // The initialization of the parameter from the argument is | |||
6117 | // a constant-evaluated context. | |||
6118 | EnterExpressionEvaluationContext ConstantEvaluated( | |||
6119 | *this, Sema::ExpressionEvaluationContext::ConstantEvaluated); | |||
6120 | ||||
6121 | if (getLangOpts().CPlusPlus17) { | |||
6122 | // C++17 [temp.arg.nontype]p1: | |||
6123 | // A template-argument for a non-type template parameter shall be | |||
6124 | // a converted constant expression of the type of the template-parameter. | |||
6125 | APValue Value; | |||
6126 | ExprResult ArgResult = CheckConvertedConstantExpression( | |||
6127 | Arg, ParamType, Value, CCEK_TemplateArg); | |||
6128 | if (ArgResult.isInvalid()) | |||
6129 | return ExprError(); | |||
6130 | ||||
6131 | // For a value-dependent argument, CheckConvertedConstantExpression is | |||
6132 | // permitted (and expected) to be unable to determine a value. | |||
6133 | if (ArgResult.get()->isValueDependent()) { | |||
6134 | Converted = TemplateArgument(ArgResult.get()); | |||
6135 | return ArgResult; | |||
6136 | } | |||
6137 | ||||
6138 | QualType CanonParamType = Context.getCanonicalType(ParamType); | |||
6139 | ||||
6140 | // Convert the APValue to a TemplateArgument. | |||
6141 | switch (Value.getKind()) { | |||
6142 | case APValue::Uninitialized: | |||
6143 | assert(ParamType->isNullPtrType())(static_cast <bool> (ParamType->isNullPtrType()) ? void (0) : __assert_fail ("ParamType->isNullPtrType()", "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6143, __extension__ __PRETTY_FUNCTION__)); | |||
6144 | Converted = TemplateArgument(CanonParamType, /*isNullPtr*/true); | |||
6145 | break; | |||
6146 | case APValue::Int: | |||
6147 | assert(ParamType->isIntegralOrEnumerationType())(static_cast <bool> (ParamType->isIntegralOrEnumerationType ()) ? void (0) : __assert_fail ("ParamType->isIntegralOrEnumerationType()" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6147, __extension__ __PRETTY_FUNCTION__)); | |||
6148 | Converted = TemplateArgument(Context, Value.getInt(), CanonParamType); | |||
6149 | break; | |||
6150 | case APValue::MemberPointer: { | |||
6151 | assert(ParamType->isMemberPointerType())(static_cast <bool> (ParamType->isMemberPointerType( )) ? void (0) : __assert_fail ("ParamType->isMemberPointerType()" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6151, __extension__ __PRETTY_FUNCTION__)); | |||
6152 | ||||
6153 | // FIXME: We need TemplateArgument representation and mangling for these. | |||
6154 | if (!Value.getMemberPointerPath().empty()) { | |||
6155 | Diag(Arg->getLocStart(), | |||
6156 | diag::err_template_arg_member_ptr_base_derived_not_supported) | |||
6157 | << Value.getMemberPointerDecl() << ParamType | |||
6158 | << Arg->getSourceRange(); | |||
6159 | return ExprError(); | |||
6160 | } | |||
6161 | ||||
6162 | auto *VD = const_cast<ValueDecl*>(Value.getMemberPointerDecl()); | |||
6163 | Converted = VD ? TemplateArgument(VD, CanonParamType) | |||
6164 | : TemplateArgument(CanonParamType, /*isNullPtr*/true); | |||
6165 | break; | |||
6166 | } | |||
6167 | case APValue::LValue: { | |||
6168 | // For a non-type template-parameter of pointer or reference type, | |||
6169 | // the value of the constant expression shall not refer to | |||
6170 | assert(ParamType->isPointerType() || ParamType->isReferenceType() ||(static_cast <bool> (ParamType->isPointerType() || ParamType ->isReferenceType() || ParamType->isNullPtrType()) ? void (0) : __assert_fail ("ParamType->isPointerType() || ParamType->isReferenceType() || ParamType->isNullPtrType()" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6171, __extension__ __PRETTY_FUNCTION__)) | |||
6171 | ParamType->isNullPtrType())(static_cast <bool> (ParamType->isPointerType() || ParamType ->isReferenceType() || ParamType->isNullPtrType()) ? void (0) : __assert_fail ("ParamType->isPointerType() || ParamType->isReferenceType() || ParamType->isNullPtrType()" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6171, __extension__ __PRETTY_FUNCTION__)); | |||
6172 | // -- a temporary object | |||
6173 | // -- a string literal | |||
6174 | // -- the result of a typeid expression, or | |||
6175 | // -- a predefined __func__ variable | |||
6176 | if (auto *E = Value.getLValueBase().dyn_cast<const Expr*>()) { | |||
6177 | if (isa<CXXUuidofExpr>(E)) { | |||
6178 | Converted = TemplateArgument(const_cast<Expr*>(E)); | |||
6179 | break; | |||
6180 | } | |||
6181 | Diag(Arg->getLocStart(), diag::err_template_arg_not_decl_ref) | |||
6182 | << Arg->getSourceRange(); | |||
6183 | return ExprError(); | |||
6184 | } | |||
6185 | auto *VD = const_cast<ValueDecl *>( | |||
6186 | Value.getLValueBase().dyn_cast<const ValueDecl *>()); | |||
6187 | // -- a subobject | |||
6188 | if (Value.hasLValuePath() && Value.getLValuePath().size() == 1 && | |||
6189 | VD && VD->getType()->isArrayType() && | |||
6190 | Value.getLValuePath()[0].ArrayIndex == 0 && | |||
6191 | !Value.isLValueOnePastTheEnd() && ParamType->isPointerType()) { | |||
6192 | // Per defect report (no number yet): | |||
6193 | // ... other than a pointer to the first element of a complete array | |||
6194 | // object. | |||
6195 | } else if (!Value.hasLValuePath() || Value.getLValuePath().size() || | |||
6196 | Value.isLValueOnePastTheEnd()) { | |||
6197 | Diag(StartLoc, diag::err_non_type_template_arg_subobject) | |||
6198 | << Value.getAsString(Context, ParamType); | |||
6199 | return ExprError(); | |||
6200 | } | |||
6201 | assert((VD || !ParamType->isReferenceType()) &&(static_cast <bool> ((VD || !ParamType->isReferenceType ()) && "null reference should not be a constant expression" ) ? void (0) : __assert_fail ("(VD || !ParamType->isReferenceType()) && \"null reference should not be a constant expression\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6202, __extension__ __PRETTY_FUNCTION__)) | |||
6202 | "null reference should not be a constant expression")(static_cast <bool> ((VD || !ParamType->isReferenceType ()) && "null reference should not be a constant expression" ) ? void (0) : __assert_fail ("(VD || !ParamType->isReferenceType()) && \"null reference should not be a constant expression\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6202, __extension__ __PRETTY_FUNCTION__)); | |||
6203 | assert((!VD || !ParamType->isNullPtrType()) &&(static_cast <bool> ((!VD || !ParamType->isNullPtrType ()) && "non-null value of type nullptr_t?") ? void (0 ) : __assert_fail ("(!VD || !ParamType->isNullPtrType()) && \"non-null value of type nullptr_t?\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6204, __extension__ __PRETTY_FUNCTION__)) | |||
6204 | "non-null value of type nullptr_t?")(static_cast <bool> ((!VD || !ParamType->isNullPtrType ()) && "non-null value of type nullptr_t?") ? void (0 ) : __assert_fail ("(!VD || !ParamType->isNullPtrType()) && \"non-null value of type nullptr_t?\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6204, __extension__ __PRETTY_FUNCTION__)); | |||
6205 | Converted = VD ? TemplateArgument(VD, CanonParamType) | |||
6206 | : TemplateArgument(CanonParamType, /*isNullPtr*/true); | |||
6207 | break; | |||
6208 | } | |||
6209 | case APValue::AddrLabelDiff: | |||
6210 | return Diag(StartLoc, diag::err_non_type_template_arg_addr_label_diff); | |||
6211 | case APValue::Float: | |||
6212 | case APValue::ComplexInt: | |||
6213 | case APValue::ComplexFloat: | |||
6214 | case APValue::Vector: | |||
6215 | case APValue::Array: | |||
6216 | case APValue::Struct: | |||
6217 | case APValue::Union: | |||
6218 | llvm_unreachable("invalid kind for template argument")::llvm::llvm_unreachable_internal("invalid kind for template argument" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6218); | |||
6219 | } | |||
6220 | ||||
6221 | return ArgResult.get(); | |||
6222 | } | |||
6223 | ||||
6224 | // C++ [temp.arg.nontype]p5: | |||
6225 | // The following conversions are performed on each expression used | |||
6226 | // as a non-type template-argument. If a non-type | |||
6227 | // template-argument cannot be converted to the type of the | |||
6228 | // corresponding template-parameter then the program is | |||
6229 | // ill-formed. | |||
6230 | if (ParamType->isIntegralOrEnumerationType()) { | |||
6231 | // C++11: | |||
6232 | // -- for a non-type template-parameter of integral or | |||
6233 | // enumeration type, conversions permitted in a converted | |||
6234 | // constant expression are applied. | |||
6235 | // | |||
6236 | // C++98: | |||
6237 | // -- for a non-type template-parameter of integral or | |||
6238 | // enumeration type, integral promotions (4.5) and integral | |||
6239 | // conversions (4.7) are applied. | |||
6240 | ||||
6241 | if (getLangOpts().CPlusPlus11) { | |||
6242 | // C++ [temp.arg.nontype]p1: | |||
6243 | // A template-argument for a non-type, non-template template-parameter | |||
6244 | // shall be one of: | |||
6245 | // | |||
6246 | // -- for a non-type template-parameter of integral or enumeration | |||
6247 | // type, a converted constant expression of the type of the | |||
6248 | // template-parameter; or | |||
6249 | llvm::APSInt Value; | |||
6250 | ExprResult ArgResult = | |||
6251 | CheckConvertedConstantExpression(Arg, ParamType, Value, | |||
6252 | CCEK_TemplateArg); | |||
6253 | if (ArgResult.isInvalid()) | |||
6254 | return ExprError(); | |||
6255 | ||||
6256 | // We can't check arbitrary value-dependent arguments. | |||
6257 | if (ArgResult.get()->isValueDependent()) { | |||
6258 | Converted = TemplateArgument(ArgResult.get()); | |||
6259 | return ArgResult; | |||
6260 | } | |||
6261 | ||||
6262 | // Widen the argument value to sizeof(parameter type). This is almost | |||
6263 | // always a no-op, except when the parameter type is bool. In | |||
6264 | // that case, this may extend the argument from 1 bit to 8 bits. | |||
6265 | QualType IntegerType = ParamType; | |||
6266 | if (const EnumType *Enum = IntegerType->getAs<EnumType>()) | |||
6267 | IntegerType = Enum->getDecl()->getIntegerType(); | |||
6268 | Value = Value.extOrTrunc(Context.getTypeSize(IntegerType)); | |||
6269 | ||||
6270 | Converted = TemplateArgument(Context, Value, | |||
6271 | Context.getCanonicalType(ParamType)); | |||
6272 | return ArgResult; | |||
6273 | } | |||
6274 | ||||
6275 | ExprResult ArgResult = DefaultLvalueConversion(Arg); | |||
6276 | if (ArgResult.isInvalid()) | |||
6277 | return ExprError(); | |||
6278 | Arg = ArgResult.get(); | |||
6279 | ||||
6280 | QualType ArgType = Arg->getType(); | |||
6281 | ||||
6282 | // C++ [temp.arg.nontype]p1: | |||
6283 | // A template-argument for a non-type, non-template | |||
6284 | // template-parameter shall be one of: | |||
6285 | // | |||
6286 | // -- an integral constant-expression of integral or enumeration | |||
6287 | // type; or | |||
6288 | // -- the name of a non-type template-parameter; or | |||
6289 | llvm::APSInt Value; | |||
6290 | if (!ArgType->isIntegralOrEnumerationType()) { | |||
6291 | Diag(Arg->getLocStart(), | |||
6292 | diag::err_template_arg_not_integral_or_enumeral) | |||
6293 | << ArgType << Arg->getSourceRange(); | |||
6294 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
6295 | return ExprError(); | |||
6296 | } else if (!Arg->isValueDependent()) { | |||
6297 | class TmplArgICEDiagnoser : public VerifyICEDiagnoser { | |||
6298 | QualType T; | |||
6299 | ||||
6300 | public: | |||
6301 | TmplArgICEDiagnoser(QualType T) : T(T) { } | |||
6302 | ||||
6303 | void diagnoseNotICE(Sema &S, SourceLocation Loc, | |||
6304 | SourceRange SR) override { | |||
6305 | S.Diag(Loc, diag::err_template_arg_not_ice) << T << SR; | |||
6306 | } | |||
6307 | } Diagnoser(ArgType); | |||
6308 | ||||
6309 | Arg = VerifyIntegerConstantExpression(Arg, &Value, Diagnoser, | |||
6310 | false).get(); | |||
6311 | if (!Arg) | |||
6312 | return ExprError(); | |||
6313 | } | |||
6314 | ||||
6315 | // From here on out, all we care about is the unqualified form | |||
6316 | // of the argument type. | |||
6317 | ArgType = ArgType.getUnqualifiedType(); | |||
6318 | ||||
6319 | // Try to convert the argument to the parameter's type. | |||
6320 | if (Context.hasSameType(ParamType, ArgType)) { | |||
6321 | // Okay: no conversion necessary | |||
6322 | } else if (ParamType->isBooleanType()) { | |||
6323 | // This is an integral-to-boolean conversion. | |||
6324 | Arg = ImpCastExprToType(Arg, ParamType, CK_IntegralToBoolean).get(); | |||
6325 | } else if (IsIntegralPromotion(Arg, ArgType, ParamType) || | |||
6326 | !ParamType->isEnumeralType()) { | |||
6327 | // This is an integral promotion or conversion. | |||
6328 | Arg = ImpCastExprToType(Arg, ParamType, CK_IntegralCast).get(); | |||
6329 | } else { | |||
6330 | // We can't perform this conversion. | |||
6331 | Diag(Arg->getLocStart(), | |||
6332 | diag::err_template_arg_not_convertible) | |||
6333 | << Arg->getType() << ParamType << Arg->getSourceRange(); | |||
6334 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
6335 | return ExprError(); | |||
6336 | } | |||
6337 | ||||
6338 | // Add the value of this argument to the list of converted | |||
6339 | // arguments. We use the bitwidth and signedness of the template | |||
6340 | // parameter. | |||
6341 | if (Arg->isValueDependent()) { | |||
6342 | // The argument is value-dependent. Create a new | |||
6343 | // TemplateArgument with the converted expression. | |||
6344 | Converted = TemplateArgument(Arg); | |||
6345 | return Arg; | |||
6346 | } | |||
6347 | ||||
6348 | QualType IntegerType = Context.getCanonicalType(ParamType); | |||
6349 | if (const EnumType *Enum = IntegerType->getAs<EnumType>()) | |||
6350 | IntegerType = Context.getCanonicalType(Enum->getDecl()->getIntegerType()); | |||
6351 | ||||
6352 | if (ParamType->isBooleanType()) { | |||
6353 | // Value must be zero or one. | |||
6354 | Value = Value != 0; | |||
6355 | unsigned AllowedBits = Context.getTypeSize(IntegerType); | |||
6356 | if (Value.getBitWidth() != AllowedBits) | |||
6357 | Value = Value.extOrTrunc(AllowedBits); | |||
6358 | Value.setIsSigned(IntegerType->isSignedIntegerOrEnumerationType()); | |||
6359 | } else { | |||
6360 | llvm::APSInt OldValue = Value; | |||
6361 | ||||
6362 | // Coerce the template argument's value to the value it will have | |||
6363 | // based on the template parameter's type. | |||
6364 | unsigned AllowedBits = Context.getTypeSize(IntegerType); | |||
6365 | if (Value.getBitWidth() != AllowedBits) | |||
6366 | Value = Value.extOrTrunc(AllowedBits); | |||
6367 | Value.setIsSigned(IntegerType->isSignedIntegerOrEnumerationType()); | |||
6368 | ||||
6369 | // Complain if an unsigned parameter received a negative value. | |||
6370 | if (IntegerType->isUnsignedIntegerOrEnumerationType() | |||
6371 | && (OldValue.isSigned() && OldValue.isNegative())) { | |||
6372 | Diag(Arg->getLocStart(), diag::warn_template_arg_negative) | |||
6373 | << OldValue.toString(10) << Value.toString(10) << Param->getType() | |||
6374 | << Arg->getSourceRange(); | |||
6375 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
6376 | } | |||
6377 | ||||
6378 | // Complain if we overflowed the template parameter's type. | |||
6379 | unsigned RequiredBits; | |||
6380 | if (IntegerType->isUnsignedIntegerOrEnumerationType()) | |||
6381 | RequiredBits = OldValue.getActiveBits(); | |||
6382 | else if (OldValue.isUnsigned()) | |||
6383 | RequiredBits = OldValue.getActiveBits() + 1; | |||
6384 | else | |||
6385 | RequiredBits = OldValue.getMinSignedBits(); | |||
6386 | if (RequiredBits > AllowedBits) { | |||
6387 | Diag(Arg->getLocStart(), | |||
6388 | diag::warn_template_arg_too_large) | |||
6389 | << OldValue.toString(10) << Value.toString(10) << Param->getType() | |||
6390 | << Arg->getSourceRange(); | |||
6391 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
6392 | } | |||
6393 | } | |||
6394 | ||||
6395 | Converted = TemplateArgument(Context, Value, | |||
6396 | ParamType->isEnumeralType() | |||
6397 | ? Context.getCanonicalType(ParamType) | |||
6398 | : IntegerType); | |||
6399 | return Arg; | |||
6400 | } | |||
6401 | ||||
6402 | QualType ArgType = Arg->getType(); | |||
6403 | DeclAccessPair FoundResult; // temporary for ResolveOverloadedFunction | |||
6404 | ||||
6405 | // Handle pointer-to-function, reference-to-function, and | |||
6406 | // pointer-to-member-function all in (roughly) the same way. | |||
6407 | if (// -- For a non-type template-parameter of type pointer to | |||
6408 | // function, only the function-to-pointer conversion (4.3) is | |||
6409 | // applied. If the template-argument represents a set of | |||
6410 | // overloaded functions (or a pointer to such), the matching | |||
6411 | // function is selected from the set (13.4). | |||
6412 | (ParamType->isPointerType() && | |||
6413 | ParamType->getAs<PointerType>()->getPointeeType()->isFunctionType()) || | |||
6414 | // -- For a non-type template-parameter of type reference to | |||
6415 | // function, no conversions apply. If the template-argument | |||
6416 | // represents a set of overloaded functions, the matching | |||
6417 | // function is selected from the set (13.4). | |||
6418 | (ParamType->isReferenceType() && | |||
6419 | ParamType->getAs<ReferenceType>()->getPointeeType()->isFunctionType()) || | |||
6420 | // -- For a non-type template-parameter of type pointer to | |||
6421 | // member function, no conversions apply. If the | |||
6422 | // template-argument represents a set of overloaded member | |||
6423 | // functions, the matching member function is selected from | |||
6424 | // the set (13.4). | |||
6425 | (ParamType->isMemberPointerType() && | |||
6426 | ParamType->getAs<MemberPointerType>()->getPointeeType() | |||
6427 | ->isFunctionType())) { | |||
6428 | ||||
6429 | if (Arg->getType() == Context.OverloadTy) { | |||
6430 | if (FunctionDecl *Fn = ResolveAddressOfOverloadedFunction(Arg, ParamType, | |||
6431 | true, | |||
6432 | FoundResult)) { | |||
6433 | if (DiagnoseUseOfDecl(Fn, Arg->getLocStart())) | |||
6434 | return ExprError(); | |||
6435 | ||||
6436 | Arg = FixOverloadedFunctionReference(Arg, FoundResult, Fn); | |||
6437 | ArgType = Arg->getType(); | |||
6438 | } else | |||
6439 | return ExprError(); | |||
6440 | } | |||
6441 | ||||
6442 | if (!ParamType->isMemberPointerType()) { | |||
6443 | if (CheckTemplateArgumentAddressOfObjectOrFunction(*this, Param, | |||
6444 | ParamType, | |||
6445 | Arg, Converted)) | |||
6446 | return ExprError(); | |||
6447 | return Arg; | |||
6448 | } | |||
6449 | ||||
6450 | if (CheckTemplateArgumentPointerToMember(*this, Param, ParamType, Arg, | |||
6451 | Converted)) | |||
6452 | return ExprError(); | |||
6453 | return Arg; | |||
6454 | } | |||
6455 | ||||
6456 | if (ParamType->isPointerType()) { | |||
6457 | // -- for a non-type template-parameter of type pointer to | |||
6458 | // object, qualification conversions (4.4) and the | |||
6459 | // array-to-pointer conversion (4.2) are applied. | |||
6460 | // C++0x also allows a value of std::nullptr_t. | |||
6461 | assert(ParamType->getPointeeType()->isIncompleteOrObjectType() &&(static_cast <bool> (ParamType->getPointeeType()-> isIncompleteOrObjectType() && "Only object pointers allowed here" ) ? void (0) : __assert_fail ("ParamType->getPointeeType()->isIncompleteOrObjectType() && \"Only object pointers allowed here\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6462, __extension__ __PRETTY_FUNCTION__)) | |||
6462 | "Only object pointers allowed here")(static_cast <bool> (ParamType->getPointeeType()-> isIncompleteOrObjectType() && "Only object pointers allowed here" ) ? void (0) : __assert_fail ("ParamType->getPointeeType()->isIncompleteOrObjectType() && \"Only object pointers allowed here\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6462, __extension__ __PRETTY_FUNCTION__)); | |||
6463 | ||||
6464 | if (CheckTemplateArgumentAddressOfObjectOrFunction(*this, Param, | |||
6465 | ParamType, | |||
6466 | Arg, Converted)) | |||
6467 | return ExprError(); | |||
6468 | return Arg; | |||
6469 | } | |||
6470 | ||||
6471 | if (const ReferenceType *ParamRefType = ParamType->getAs<ReferenceType>()) { | |||
6472 | // -- For a non-type template-parameter of type reference to | |||
6473 | // object, no conversions apply. The type referred to by the | |||
6474 | // reference may be more cv-qualified than the (otherwise | |||
6475 | // identical) type of the template-argument. The | |||
6476 | // template-parameter is bound directly to the | |||
6477 | // template-argument, which must be an lvalue. | |||
6478 | assert(ParamRefType->getPointeeType()->isIncompleteOrObjectType() &&(static_cast <bool> (ParamRefType->getPointeeType()-> isIncompleteOrObjectType() && "Only object references allowed here" ) ? void (0) : __assert_fail ("ParamRefType->getPointeeType()->isIncompleteOrObjectType() && \"Only object references allowed here\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6479, __extension__ __PRETTY_FUNCTION__)) | |||
6479 | "Only object references allowed here")(static_cast <bool> (ParamRefType->getPointeeType()-> isIncompleteOrObjectType() && "Only object references allowed here" ) ? void (0) : __assert_fail ("ParamRefType->getPointeeType()->isIncompleteOrObjectType() && \"Only object references allowed here\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6479, __extension__ __PRETTY_FUNCTION__)); | |||
6480 | ||||
6481 | if (Arg->getType() == Context.OverloadTy) { | |||
6482 | if (FunctionDecl *Fn = ResolveAddressOfOverloadedFunction(Arg, | |||
6483 | ParamRefType->getPointeeType(), | |||
6484 | true, | |||
6485 | FoundResult)) { | |||
6486 | if (DiagnoseUseOfDecl(Fn, Arg->getLocStart())) | |||
6487 | return ExprError(); | |||
6488 | ||||
6489 | Arg = FixOverloadedFunctionReference(Arg, FoundResult, Fn); | |||
6490 | ArgType = Arg->getType(); | |||
6491 | } else | |||
6492 | return ExprError(); | |||
6493 | } | |||
6494 | ||||
6495 | if (CheckTemplateArgumentAddressOfObjectOrFunction(*this, Param, | |||
6496 | ParamType, | |||
6497 | Arg, Converted)) | |||
6498 | return ExprError(); | |||
6499 | return Arg; | |||
6500 | } | |||
6501 | ||||
6502 | // Deal with parameters of type std::nullptr_t. | |||
6503 | if (ParamType->isNullPtrType()) { | |||
6504 | if (Arg->isTypeDependent() || Arg->isValueDependent()) { | |||
6505 | Converted = TemplateArgument(Arg); | |||
6506 | return Arg; | |||
6507 | } | |||
6508 | ||||
6509 | switch (isNullPointerValueTemplateArgument(*this, Param, ParamType, Arg)) { | |||
6510 | case NPV_NotNullPointer: | |||
6511 | Diag(Arg->getExprLoc(), diag::err_template_arg_not_convertible) | |||
6512 | << Arg->getType() << ParamType; | |||
6513 | Diag(Param->getLocation(), diag::note_template_param_here); | |||
6514 | return ExprError(); | |||
6515 | ||||
6516 | case NPV_Error: | |||
6517 | return ExprError(); | |||
6518 | ||||
6519 | case NPV_NullPointer: | |||
6520 | Diag(Arg->getExprLoc(), diag::warn_cxx98_compat_template_arg_null); | |||
6521 | Converted = TemplateArgument(Context.getCanonicalType(ParamType), | |||
6522 | /*isNullPtr*/true); | |||
6523 | return Arg; | |||
6524 | } | |||
6525 | } | |||
6526 | ||||
6527 | // -- For a non-type template-parameter of type pointer to data | |||
6528 | // member, qualification conversions (4.4) are applied. | |||
6529 | assert(ParamType->isMemberPointerType() && "Only pointers to members remain")(static_cast <bool> (ParamType->isMemberPointerType( ) && "Only pointers to members remain") ? void (0) : __assert_fail ("ParamType->isMemberPointerType() && \"Only pointers to members remain\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6529, __extension__ __PRETTY_FUNCTION__)); | |||
6530 | ||||
6531 | if (CheckTemplateArgumentPointerToMember(*this, Param, ParamType, Arg, | |||
6532 | Converted)) | |||
6533 | return ExprError(); | |||
6534 | return Arg; | |||
6535 | } | |||
6536 | ||||
6537 | static void DiagnoseTemplateParameterListArityMismatch( | |||
6538 | Sema &S, TemplateParameterList *New, TemplateParameterList *Old, | |||
6539 | Sema::TemplateParameterListEqualKind Kind, SourceLocation TemplateArgLoc); | |||
6540 | ||||
6541 | /// \brief Check a template argument against its corresponding | |||
6542 | /// template template parameter. | |||
6543 | /// | |||
6544 | /// This routine implements the semantics of C++ [temp.arg.template]. | |||
6545 | /// It returns true if an error occurred, and false otherwise. | |||
6546 | bool Sema::CheckTemplateTemplateArgument(TemplateParameterList *Params, | |||
6547 | TemplateArgumentLoc &Arg) { | |||
6548 | TemplateName Name = Arg.getArgument().getAsTemplateOrTemplatePattern(); | |||
6549 | TemplateDecl *Template = Name.getAsTemplateDecl(); | |||
6550 | if (!Template) { | |||
6551 | // Any dependent template name is fine. | |||
6552 | assert(Name.isDependent() && "Non-dependent template isn't a declaration?")(static_cast <bool> (Name.isDependent() && "Non-dependent template isn't a declaration?" ) ? void (0) : __assert_fail ("Name.isDependent() && \"Non-dependent template isn't a declaration?\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6552, __extension__ __PRETTY_FUNCTION__)); | |||
6553 | return false; | |||
6554 | } | |||
6555 | ||||
6556 | if (Template->isInvalidDecl()) | |||
6557 | return true; | |||
6558 | ||||
6559 | // C++0x [temp.arg.template]p1: | |||
6560 | // A template-argument for a template template-parameter shall be | |||
6561 | // the name of a class template or an alias template, expressed as an | |||
6562 | // id-expression. When the template-argument names a class template, only | |||
6563 | // primary class templates are considered when matching the | |||
6564 | // template template argument with the corresponding parameter; | |||
6565 | // partial specializations are not considered even if their | |||
6566 | // parameter lists match that of the template template parameter. | |||
6567 | // | |||
6568 | // Note that we also allow template template parameters here, which | |||
6569 | // will happen when we are dealing with, e.g., class template | |||
6570 | // partial specializations. | |||
6571 | if (!isa<ClassTemplateDecl>(Template) && | |||
6572 | !isa<TemplateTemplateParmDecl>(Template) && | |||
6573 | !isa<TypeAliasTemplateDecl>(Template) && | |||
6574 | !isa<BuiltinTemplateDecl>(Template)) { | |||
6575 | assert(isa<FunctionTemplateDecl>(Template) &&(static_cast <bool> (isa<FunctionTemplateDecl>(Template ) && "Only function templates are possible here") ? void (0) : __assert_fail ("isa<FunctionTemplateDecl>(Template) && \"Only function templates are possible here\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6576, __extension__ __PRETTY_FUNCTION__)) | |||
6576 | "Only function templates are possible here")(static_cast <bool> (isa<FunctionTemplateDecl>(Template ) && "Only function templates are possible here") ? void (0) : __assert_fail ("isa<FunctionTemplateDecl>(Template) && \"Only function templates are possible here\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6576, __extension__ __PRETTY_FUNCTION__)); | |||
6577 | Diag(Arg.getLocation(), diag::err_template_arg_not_valid_template); | |||
6578 | Diag(Template->getLocation(), diag::note_template_arg_refers_here_func) | |||
6579 | << Template; | |||
6580 | } | |||
6581 | ||||
6582 | // C++1z [temp.arg.template]p3: (DR 150) | |||
6583 | // A template-argument matches a template template-parameter P when P | |||
6584 | // is at least as specialized as the template-argument A. | |||
6585 | if (getLangOpts().RelaxedTemplateTemplateArgs) { | |||
6586 | // Quick check for the common case: | |||
6587 | // If P contains a parameter pack, then A [...] matches P if each of A's | |||
6588 | // template parameters matches the corresponding template parameter in | |||
6589 | // the template-parameter-list of P. | |||
6590 | if (TemplateParameterListsAreEqual( | |||
6591 | Template->getTemplateParameters(), Params, false, | |||
6592 | TPL_TemplateTemplateArgumentMatch, Arg.getLocation())) | |||
6593 | return false; | |||
6594 | ||||
6595 | if (isTemplateTemplateParameterAtLeastAsSpecializedAs(Params, Template, | |||
6596 | Arg.getLocation())) | |||
6597 | return false; | |||
6598 | // FIXME: Produce better diagnostics for deduction failures. | |||
6599 | } | |||
6600 | ||||
6601 | return !TemplateParameterListsAreEqual(Template->getTemplateParameters(), | |||
6602 | Params, | |||
6603 | true, | |||
6604 | TPL_TemplateTemplateArgumentMatch, | |||
6605 | Arg.getLocation()); | |||
6606 | } | |||
6607 | ||||
6608 | /// \brief Given a non-type template argument that refers to a | |||
6609 | /// declaration and the type of its corresponding non-type template | |||
6610 | /// parameter, produce an expression that properly refers to that | |||
6611 | /// declaration. | |||
6612 | ExprResult | |||
6613 | Sema::BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, | |||
6614 | QualType ParamType, | |||
6615 | SourceLocation Loc) { | |||
6616 | // C++ [temp.param]p8: | |||
6617 | // | |||
6618 | // A non-type template-parameter of type "array of T" or | |||
6619 | // "function returning T" is adjusted to be of type "pointer to | |||
6620 | // T" or "pointer to function returning T", respectively. | |||
6621 | if (ParamType->isArrayType()) | |||
6622 | ParamType = Context.getArrayDecayedType(ParamType); | |||
6623 | else if (ParamType->isFunctionType()) | |||
6624 | ParamType = Context.getPointerType(ParamType); | |||
6625 | ||||
6626 | // For a NULL non-type template argument, return nullptr casted to the | |||
6627 | // parameter's type. | |||
6628 | if (Arg.getKind() == TemplateArgument::NullPtr) { | |||
6629 | return ImpCastExprToType( | |||
6630 | new (Context) CXXNullPtrLiteralExpr(Context.NullPtrTy, Loc), | |||
6631 | ParamType, | |||
6632 | ParamType->getAs<MemberPointerType>() | |||
6633 | ? CK_NullToMemberPointer | |||
6634 | : CK_NullToPointer); | |||
6635 | } | |||
6636 | assert(Arg.getKind() == TemplateArgument::Declaration &&(static_cast <bool> (Arg.getKind() == TemplateArgument:: Declaration && "Only declaration template arguments permitted here" ) ? void (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Declaration && \"Only declaration template arguments permitted here\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6637, __extension__ __PRETTY_FUNCTION__)) | |||
6637 | "Only declaration template arguments permitted here")(static_cast <bool> (Arg.getKind() == TemplateArgument:: Declaration && "Only declaration template arguments permitted here" ) ? void (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Declaration && \"Only declaration template arguments permitted here\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6637, __extension__ __PRETTY_FUNCTION__)); | |||
6638 | ||||
6639 | ValueDecl *VD = Arg.getAsDecl(); | |||
6640 | ||||
6641 | if (VD->getDeclContext()->isRecord() && | |||
6642 | (isa<CXXMethodDecl>(VD) || isa<FieldDecl>(VD) || | |||
6643 | isa<IndirectFieldDecl>(VD))) { | |||
6644 | // If the value is a class member, we might have a pointer-to-member. | |||
6645 | // Determine whether the non-type template template parameter is of | |||
6646 | // pointer-to-member type. If so, we need to build an appropriate | |||
6647 | // expression for a pointer-to-member, since a "normal" DeclRefExpr | |||
6648 | // would refer to the member itself. | |||
6649 | if (ParamType->isMemberPointerType()) { | |||
6650 | QualType ClassType | |||
6651 | = Context.getTypeDeclType(cast<RecordDecl>(VD->getDeclContext())); | |||
6652 | NestedNameSpecifier *Qualifier | |||
6653 | = NestedNameSpecifier::Create(Context, nullptr, false, | |||
6654 | ClassType.getTypePtr()); | |||
6655 | CXXScopeSpec SS; | |||
6656 | SS.MakeTrivial(Context, Qualifier, Loc); | |||
6657 | ||||
6658 | // The actual value-ness of this is unimportant, but for | |||
6659 | // internal consistency's sake, references to instance methods | |||
6660 | // are r-values. | |||
6661 | ExprValueKind VK = VK_LValue; | |||
6662 | if (isa<CXXMethodDecl>(VD) && cast<CXXMethodDecl>(VD)->isInstance()) | |||
6663 | VK = VK_RValue; | |||
6664 | ||||
6665 | ExprResult RefExpr = BuildDeclRefExpr(VD, | |||
6666 | VD->getType().getNonReferenceType(), | |||
6667 | VK, | |||
6668 | Loc, | |||
6669 | &SS); | |||
6670 | if (RefExpr.isInvalid()) | |||
6671 | return ExprError(); | |||
6672 | ||||
6673 | RefExpr = CreateBuiltinUnaryOp(Loc, UO_AddrOf, RefExpr.get()); | |||
6674 | ||||
6675 | // We might need to perform a trailing qualification conversion, since | |||
6676 | // the element type on the parameter could be more qualified than the | |||
6677 | // element type in the expression we constructed. | |||
6678 | bool ObjCLifetimeConversion; | |||
6679 | if (IsQualificationConversion(((Expr*) RefExpr.get())->getType(), | |||
6680 | ParamType.getUnqualifiedType(), false, | |||
6681 | ObjCLifetimeConversion)) | |||
6682 | RefExpr = ImpCastExprToType(RefExpr.get(), ParamType.getUnqualifiedType(), CK_NoOp); | |||
6683 | ||||
6684 | assert(!RefExpr.isInvalid() &&(static_cast <bool> (!RefExpr.isInvalid() && Context .hasSameType(((Expr*) RefExpr.get())->getType(), ParamType .getUnqualifiedType())) ? void (0) : __assert_fail ("!RefExpr.isInvalid() && Context.hasSameType(((Expr*) RefExpr.get())->getType(), ParamType.getUnqualifiedType())" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6686, __extension__ __PRETTY_FUNCTION__)) | |||
6685 | Context.hasSameType(((Expr*) RefExpr.get())->getType(),(static_cast <bool> (!RefExpr.isInvalid() && Context .hasSameType(((Expr*) RefExpr.get())->getType(), ParamType .getUnqualifiedType())) ? void (0) : __assert_fail ("!RefExpr.isInvalid() && Context.hasSameType(((Expr*) RefExpr.get())->getType(), ParamType.getUnqualifiedType())" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6686, __extension__ __PRETTY_FUNCTION__)) | |||
6686 | ParamType.getUnqualifiedType()))(static_cast <bool> (!RefExpr.isInvalid() && Context .hasSameType(((Expr*) RefExpr.get())->getType(), ParamType .getUnqualifiedType())) ? void (0) : __assert_fail ("!RefExpr.isInvalid() && Context.hasSameType(((Expr*) RefExpr.get())->getType(), ParamType.getUnqualifiedType())" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6686, __extension__ __PRETTY_FUNCTION__)); | |||
6687 | return RefExpr; | |||
6688 | } | |||
6689 | } | |||
6690 | ||||
6691 | QualType T = VD->getType().getNonReferenceType(); | |||
6692 | ||||
6693 | if (ParamType->isPointerType()) { | |||
6694 | // When the non-type template parameter is a pointer, take the | |||
6695 | // address of the declaration. | |||
6696 | ExprResult RefExpr = BuildDeclRefExpr(VD, T, VK_LValue, Loc); | |||
6697 | if (RefExpr.isInvalid()) | |||
6698 | return ExprError(); | |||
6699 | ||||
6700 | if (!Context.hasSameUnqualifiedType(ParamType->getPointeeType(), T) && | |||
6701 | (T->isFunctionType() || T->isArrayType())) { | |||
6702 | // Decay functions and arrays unless we're forming a pointer to array. | |||
6703 | RefExpr = DefaultFunctionArrayConversion(RefExpr.get()); | |||
6704 | if (RefExpr.isInvalid()) | |||
6705 | return ExprError(); | |||
6706 | ||||
6707 | return RefExpr; | |||
6708 | } | |||
6709 | ||||
6710 | // Take the address of everything else | |||
6711 | return CreateBuiltinUnaryOp(Loc, UO_AddrOf, RefExpr.get()); | |||
6712 | } | |||
6713 | ||||
6714 | ExprValueKind VK = VK_RValue; | |||
6715 | ||||
6716 | // If the non-type template parameter has reference type, qualify the | |||
6717 | // resulting declaration reference with the extra qualifiers on the | |||
6718 | // type that the reference refers to. | |||
6719 | if (const ReferenceType *TargetRef = ParamType->getAs<ReferenceType>()) { | |||
6720 | VK = VK_LValue; | |||
6721 | T = Context.getQualifiedType(T, | |||
6722 | TargetRef->getPointeeType().getQualifiers()); | |||
6723 | } else if (isa<FunctionDecl>(VD)) { | |||
6724 | // References to functions are always lvalues. | |||
6725 | VK = VK_LValue; | |||
6726 | } | |||
6727 | ||||
6728 | return BuildDeclRefExpr(VD, T, VK, Loc); | |||
6729 | } | |||
6730 | ||||
6731 | /// \brief Construct a new expression that refers to the given | |||
6732 | /// integral template argument with the given source-location | |||
6733 | /// information. | |||
6734 | /// | |||
6735 | /// This routine takes care of the mapping from an integral template | |||
6736 | /// argument (which may have any integral type) to the appropriate | |||
6737 | /// literal value. | |||
6738 | ExprResult | |||
6739 | Sema::BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, | |||
6740 | SourceLocation Loc) { | |||
6741 | assert(Arg.getKind() == TemplateArgument::Integral &&(static_cast <bool> (Arg.getKind() == TemplateArgument:: Integral && "Operation is only valid for integral template arguments" ) ? void (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Integral && \"Operation is only valid for integral template arguments\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6742, __extension__ __PRETTY_FUNCTION__)) | |||
6742 | "Operation is only valid for integral template arguments")(static_cast <bool> (Arg.getKind() == TemplateArgument:: Integral && "Operation is only valid for integral template arguments" ) ? void (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Integral && \"Operation is only valid for integral template arguments\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 6742, __extension__ __PRETTY_FUNCTION__)); | |||
6743 | QualType OrigT = Arg.getIntegralType(); | |||
6744 | ||||
6745 | // If this is an enum type that we're instantiating, we need to use an integer | |||
6746 | // type the same size as the enumerator. We don't want to build an | |||
6747 | // IntegerLiteral with enum type. The integer type of an enum type can be of | |||
6748 | // any integral type with C++11 enum classes, make sure we create the right | |||
6749 | // type of literal for it. | |||
6750 | QualType T = OrigT; | |||
6751 | if (const EnumType *ET = OrigT->getAs<EnumType>()) | |||
6752 | T = ET->getDecl()->getIntegerType(); | |||
6753 | ||||
6754 | Expr *E; | |||
6755 | if (T->isAnyCharacterType()) { | |||
6756 | // This does not need to handle u8 character literals because those are | |||
6757 | // of type char, and so can also be covered by an ASCII character literal. | |||
6758 | CharacterLiteral::CharacterKind Kind; | |||
6759 | if (T->isWideCharType()) | |||
6760 | Kind = CharacterLiteral::Wide; | |||
6761 | else if (T->isChar16Type()) | |||
6762 | Kind = CharacterLiteral::UTF16; | |||
6763 | else if (T->isChar32Type()) | |||
6764 | Kind = CharacterLiteral::UTF32; | |||
6765 | else | |||
6766 | Kind = CharacterLiteral::Ascii; | |||
6767 | ||||
6768 | E = new (Context) CharacterLiteral(Arg.getAsIntegral().getZExtValue(), | |||
6769 | Kind, T, Loc); | |||
6770 | } else if (T->isBooleanType()) { | |||
6771 | E = new (Context) CXXBoolLiteralExpr(Arg.getAsIntegral().getBoolValue(), | |||
6772 | T, Loc); | |||
6773 | } else if (T->isNullPtrType()) { | |||
6774 | E = new (Context) CXXNullPtrLiteralExpr(Context.NullPtrTy, Loc); | |||
6775 | } else { | |||
6776 | E = IntegerLiteral::Create(Context, Arg.getAsIntegral(), T, Loc); | |||
6777 | } | |||
6778 | ||||
6779 | if (OrigT->isEnumeralType()) { | |||
6780 | // FIXME: This is a hack. We need a better way to handle substituted | |||
6781 | // non-type template parameters. | |||
6782 | E = CStyleCastExpr::Create(Context, OrigT, VK_RValue, CK_IntegralCast, E, | |||
6783 | nullptr, | |||
6784 | Context.getTrivialTypeSourceInfo(OrigT, Loc), | |||
6785 | Loc, Loc); | |||
6786 | } | |||
6787 | ||||
6788 | return E; | |||
6789 | } | |||
6790 | ||||
6791 | /// \brief Match two template parameters within template parameter lists. | |||
6792 | static bool MatchTemplateParameterKind(Sema &S, NamedDecl *New, NamedDecl *Old, | |||
6793 | bool Complain, | |||
6794 | Sema::TemplateParameterListEqualKind Kind, | |||
6795 | SourceLocation TemplateArgLoc) { | |||
6796 | // Check the actual kind (type, non-type, template). | |||
6797 | if (Old->getKind() != New->getKind()) { | |||
6798 | if (Complain) { | |||
6799 | unsigned NextDiag = diag::err_template_param_different_kind; | |||
6800 | if (TemplateArgLoc.isValid()) { | |||
6801 | S.Diag(TemplateArgLoc, diag::err_template_arg_template_params_mismatch); | |||
6802 | NextDiag = diag::note_template_param_different_kind; | |||
6803 | } | |||
6804 | S.Diag(New->getLocation(), NextDiag) | |||
6805 | << (Kind != Sema::TPL_TemplateMatch); | |||
6806 | S.Diag(Old->getLocation(), diag::note_template_prev_declaration) | |||
6807 | << (Kind != Sema::TPL_TemplateMatch); | |||
6808 | } | |||
6809 | ||||
6810 | return false; | |||
6811 | } | |||
6812 | ||||
6813 | // Check that both are parameter packs or neither are parameter packs. | |||
6814 | // However, if we are matching a template template argument to a | |||
6815 | // template template parameter, the template template parameter can have | |||
6816 | // a parameter pack where the template template argument does not. | |||
6817 | if (Old->isTemplateParameterPack() != New->isTemplateParameterPack() && | |||
6818 | !(Kind == Sema::TPL_TemplateTemplateArgumentMatch && | |||
6819 | Old->isTemplateParameterPack())) { | |||
6820 | if (Complain) { | |||
6821 | unsigned NextDiag = diag::err_template_parameter_pack_non_pack; | |||
6822 | if (TemplateArgLoc.isValid()) { | |||
6823 | S.Diag(TemplateArgLoc, | |||
6824 | diag::err_template_arg_template_params_mismatch); | |||
6825 | NextDiag = diag::note_template_parameter_pack_non_pack; | |||
6826 | } | |||
6827 | ||||
6828 | unsigned ParamKind = isa<TemplateTypeParmDecl>(New)? 0 | |||
6829 | : isa<NonTypeTemplateParmDecl>(New)? 1 | |||
6830 | : 2; | |||
6831 | S.Diag(New->getLocation(), NextDiag) | |||
6832 | << ParamKind << New->isParameterPack(); | |||
6833 | S.Diag(Old->getLocation(), diag::note_template_parameter_pack_here) | |||
6834 | << ParamKind << Old->isParameterPack(); | |||
6835 | } | |||
6836 | ||||
6837 | return false; | |||
6838 | } | |||
6839 | ||||
6840 | // For non-type template parameters, check the type of the parameter. | |||
6841 | if (NonTypeTemplateParmDecl *OldNTTP | |||
6842 | = dyn_cast<NonTypeTemplateParmDecl>(Old)) { | |||
6843 | NonTypeTemplateParmDecl *NewNTTP = cast<NonTypeTemplateParmDecl>(New); | |||
6844 | ||||
6845 | // If we are matching a template template argument to a template | |||
6846 | // template parameter and one of the non-type template parameter types | |||
6847 | // is dependent, then we must wait until template instantiation time | |||
6848 | // to actually compare the arguments. | |||
6849 | if (Kind == Sema::TPL_TemplateTemplateArgumentMatch && | |||
6850 | (OldNTTP->getType()->isDependentType() || | |||
6851 | NewNTTP->getType()->isDependentType())) | |||
6852 | return true; | |||
6853 | ||||
6854 | if (!S.Context.hasSameType(OldNTTP->getType(), NewNTTP->getType())) { | |||
6855 | if (Complain) { | |||
6856 | unsigned NextDiag = diag::err_template_nontype_parm_different_type; | |||
6857 | if (TemplateArgLoc.isValid()) { | |||
6858 | S.Diag(TemplateArgLoc, | |||
6859 | diag::err_template_arg_template_params_mismatch); | |||
6860 | NextDiag = diag::note_template_nontype_parm_different_type; | |||
6861 | } | |||
6862 | S.Diag(NewNTTP->getLocation(), NextDiag) | |||
6863 | << NewNTTP->getType() | |||
6864 | << (Kind != Sema::TPL_TemplateMatch); | |||
6865 | S.Diag(OldNTTP->getLocation(), | |||
6866 | diag::note_template_nontype_parm_prev_declaration) | |||
6867 | << OldNTTP->getType(); | |||
6868 | } | |||
6869 | ||||
6870 | return false; | |||
6871 | } | |||
6872 | ||||
6873 | return true; | |||
6874 | } | |||
6875 | ||||
6876 | // For template template parameters, check the template parameter types. | |||
6877 | // The template parameter lists of template template | |||
6878 | // parameters must agree. | |||
6879 | if (TemplateTemplateParmDecl *OldTTP | |||
6880 | = dyn_cast<TemplateTemplateParmDecl>(Old)) { | |||
6881 | TemplateTemplateParmDecl *NewTTP = cast<TemplateTemplateParmDecl>(New); | |||
6882 | return S.TemplateParameterListsAreEqual(NewTTP->getTemplateParameters(), | |||
6883 | OldTTP->getTemplateParameters(), | |||
6884 | Complain, | |||
6885 | (Kind == Sema::TPL_TemplateMatch | |||
6886 | ? Sema::TPL_TemplateTemplateParmMatch | |||
6887 | : Kind), | |||
6888 | TemplateArgLoc); | |||
6889 | } | |||
6890 | ||||
6891 | return true; | |||
6892 | } | |||
6893 | ||||
6894 | /// \brief Diagnose a known arity mismatch when comparing template argument | |||
6895 | /// lists. | |||
6896 | static | |||
6897 | void DiagnoseTemplateParameterListArityMismatch(Sema &S, | |||
6898 | TemplateParameterList *New, | |||
6899 | TemplateParameterList *Old, | |||
6900 | Sema::TemplateParameterListEqualKind Kind, | |||
6901 | SourceLocation TemplateArgLoc) { | |||
6902 | unsigned NextDiag = diag::err_template_param_list_different_arity; | |||
6903 | if (TemplateArgLoc.isValid()) { | |||
6904 | S.Diag(TemplateArgLoc, diag::err_template_arg_template_params_mismatch); | |||
6905 | NextDiag = diag::note_template_param_list_different_arity; | |||
6906 | } | |||
6907 | S.Diag(New->getTemplateLoc(), NextDiag) | |||
6908 | << (New->size() > Old->size()) | |||
6909 | << (Kind != Sema::TPL_TemplateMatch) | |||
6910 | << SourceRange(New->getTemplateLoc(), New->getRAngleLoc()); | |||
6911 | S.Diag(Old->getTemplateLoc(), diag::note_template_prev_declaration) | |||
6912 | << (Kind != Sema::TPL_TemplateMatch) | |||
6913 | << SourceRange(Old->getTemplateLoc(), Old->getRAngleLoc()); | |||
6914 | } | |||
6915 | ||||
6916 | /// \brief Determine whether the given template parameter lists are | |||
6917 | /// equivalent. | |||
6918 | /// | |||
6919 | /// \param New The new template parameter list, typically written in the | |||
6920 | /// source code as part of a new template declaration. | |||
6921 | /// | |||
6922 | /// \param Old The old template parameter list, typically found via | |||
6923 | /// name lookup of the template declared with this template parameter | |||
6924 | /// list. | |||
6925 | /// | |||
6926 | /// \param Complain If true, this routine will produce a diagnostic if | |||
6927 | /// the template parameter lists are not equivalent. | |||
6928 | /// | |||
6929 | /// \param Kind describes how we are to match the template parameter lists. | |||
6930 | /// | |||
6931 | /// \param TemplateArgLoc If this source location is valid, then we | |||
6932 | /// are actually checking the template parameter list of a template | |||
6933 | /// argument (New) against the template parameter list of its | |||
6934 | /// corresponding template template parameter (Old). We produce | |||
6935 | /// slightly different diagnostics in this scenario. | |||
6936 | /// | |||
6937 | /// \returns True if the template parameter lists are equal, false | |||
6938 | /// otherwise. | |||
6939 | bool | |||
6940 | Sema::TemplateParameterListsAreEqual(TemplateParameterList *New, | |||
6941 | TemplateParameterList *Old, | |||
6942 | bool Complain, | |||
6943 | TemplateParameterListEqualKind Kind, | |||
6944 | SourceLocation TemplateArgLoc) { | |||
6945 | if (Old->size() != New->size() && Kind != TPL_TemplateTemplateArgumentMatch) { | |||
6946 | if (Complain) | |||
6947 | DiagnoseTemplateParameterListArityMismatch(*this, New, Old, Kind, | |||
6948 | TemplateArgLoc); | |||
6949 | ||||
6950 | return false; | |||
6951 | } | |||
6952 | ||||
6953 | // C++0x [temp.arg.template]p3: | |||
6954 | // A template-argument matches a template template-parameter (call it P) | |||
6955 | // when each of the template parameters in the template-parameter-list of | |||
6956 | // the template-argument's corresponding class template or alias template | |||
6957 | // (call it A) matches the corresponding template parameter in the | |||
6958 | // template-parameter-list of P. [...] | |||
6959 | TemplateParameterList::iterator NewParm = New->begin(); | |||
6960 | TemplateParameterList::iterator NewParmEnd = New->end(); | |||
6961 | for (TemplateParameterList::iterator OldParm = Old->begin(), | |||
6962 | OldParmEnd = Old->end(); | |||
6963 | OldParm != OldParmEnd; ++OldParm) { | |||
6964 | if (Kind != TPL_TemplateTemplateArgumentMatch || | |||
6965 | !(*OldParm)->isTemplateParameterPack()) { | |||
6966 | if (NewParm == NewParmEnd) { | |||
6967 | if (Complain) | |||
6968 | DiagnoseTemplateParameterListArityMismatch(*this, New, Old, Kind, | |||
6969 | TemplateArgLoc); | |||
6970 | ||||
6971 | return false; | |||
6972 | } | |||
6973 | ||||
6974 | if (!MatchTemplateParameterKind(*this, *NewParm, *OldParm, Complain, | |||
6975 | Kind, TemplateArgLoc)) | |||
6976 | return false; | |||
6977 | ||||
6978 | ++NewParm; | |||
6979 | continue; | |||
6980 | } | |||
6981 | ||||
6982 | // C++0x [temp.arg.template]p3: | |||
6983 | // [...] When P's template- parameter-list contains a template parameter | |||
6984 | // pack (14.5.3), the template parameter pack will match zero or more | |||
6985 | // template parameters or template parameter packs in the | |||
6986 | // template-parameter-list of A with the same type and form as the | |||
6987 | // template parameter pack in P (ignoring whether those template | |||
6988 | // parameters are template parameter packs). | |||
6989 | for (; NewParm != NewParmEnd; ++NewParm) { | |||
6990 | if (!MatchTemplateParameterKind(*this, *NewParm, *OldParm, Complain, | |||
6991 | Kind, TemplateArgLoc)) | |||
6992 | return false; | |||
6993 | } | |||
6994 | } | |||
6995 | ||||
6996 | // Make sure we exhausted all of the arguments. | |||
6997 | if (NewParm != NewParmEnd) { | |||
6998 | if (Complain) | |||
6999 | DiagnoseTemplateParameterListArityMismatch(*this, New, Old, Kind, | |||
7000 | TemplateArgLoc); | |||
7001 | ||||
7002 | return false; | |||
7003 | } | |||
7004 | ||||
7005 | return true; | |||
7006 | } | |||
7007 | ||||
7008 | /// \brief Check whether a template can be declared within this scope. | |||
7009 | /// | |||
7010 | /// If the template declaration is valid in this scope, returns | |||
7011 | /// false. Otherwise, issues a diagnostic and returns true. | |||
7012 | bool | |||
7013 | Sema::CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams) { | |||
7014 | if (!S) | |||
7015 | return false; | |||
7016 | ||||
7017 | // Find the nearest enclosing declaration scope. | |||
7018 | while ((S->getFlags() & Scope::DeclScope) == 0 || | |||
7019 | (S->getFlags() & Scope::TemplateParamScope) != 0) | |||
7020 | S = S->getParent(); | |||
7021 | ||||
7022 | // C++ [temp]p4: | |||
7023 | // A template [...] shall not have C linkage. | |||
7024 | DeclContext *Ctx = S->getEntity(); | |||
7025 | if (Ctx && Ctx->isExternCContext()) { | |||
7026 | Diag(TemplateParams->getTemplateLoc(), diag::err_template_linkage) | |||
7027 | << TemplateParams->getSourceRange(); | |||
7028 | if (const LinkageSpecDecl *LSD = Ctx->getExternCContext()) | |||
7029 | Diag(LSD->getExternLoc(), diag::note_extern_c_begins_here); | |||
7030 | return true; | |||
7031 | } | |||
7032 | Ctx = Ctx->getRedeclContext(); | |||
7033 | ||||
7034 | // C++ [temp]p2: | |||
7035 | // A template-declaration can appear only as a namespace scope or | |||
7036 | // class scope declaration. | |||
7037 | if (Ctx) { | |||
7038 | if (Ctx->isFileContext()) | |||
7039 | return false; | |||
7040 | if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(Ctx)) { | |||
7041 | // C++ [temp.mem]p2: | |||
7042 | // A local class shall not have member templates. | |||
7043 | if (RD->isLocalClass()) | |||
7044 | return Diag(TemplateParams->getTemplateLoc(), | |||
7045 | diag::err_template_inside_local_class) | |||
7046 | << TemplateParams->getSourceRange(); | |||
7047 | else | |||
7048 | return false; | |||
7049 | } | |||
7050 | } | |||
7051 | ||||
7052 | return Diag(TemplateParams->getTemplateLoc(), | |||
7053 | diag::err_template_outside_namespace_or_class_scope) | |||
7054 | << TemplateParams->getSourceRange(); | |||
7055 | } | |||
7056 | ||||
7057 | /// \brief Determine what kind of template specialization the given declaration | |||
7058 | /// is. | |||
7059 | static TemplateSpecializationKind getTemplateSpecializationKind(Decl *D) { | |||
7060 | if (!D) | |||
7061 | return TSK_Undeclared; | |||
7062 | ||||
7063 | if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(D)) | |||
7064 | return Record->getTemplateSpecializationKind(); | |||
7065 | if (FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) | |||
7066 | return Function->getTemplateSpecializationKind(); | |||
7067 | if (VarDecl *Var = dyn_cast<VarDecl>(D)) | |||
7068 | return Var->getTemplateSpecializationKind(); | |||
7069 | ||||
7070 | return TSK_Undeclared; | |||
7071 | } | |||
7072 | ||||
7073 | /// \brief Check whether a specialization is well-formed in the current | |||
7074 | /// context. | |||
7075 | /// | |||
7076 | /// This routine determines whether a template specialization can be declared | |||
7077 | /// in the current context (C++ [temp.expl.spec]p2). | |||
7078 | /// | |||
7079 | /// \param S the semantic analysis object for which this check is being | |||
7080 | /// performed. | |||
7081 | /// | |||
7082 | /// \param Specialized the entity being specialized or instantiated, which | |||
7083 | /// may be a kind of template (class template, function template, etc.) or | |||
7084 | /// a member of a class template (member function, static data member, | |||
7085 | /// member class). | |||
7086 | /// | |||
7087 | /// \param PrevDecl the previous declaration of this entity, if any. | |||
7088 | /// | |||
7089 | /// \param Loc the location of the explicit specialization or instantiation of | |||
7090 | /// this entity. | |||
7091 | /// | |||
7092 | /// \param IsPartialSpecialization whether this is a partial specialization of | |||
7093 | /// a class template. | |||
7094 | /// | |||
7095 | /// \returns true if there was an error that we cannot recover from, false | |||
7096 | /// otherwise. | |||
7097 | static bool CheckTemplateSpecializationScope(Sema &S, | |||
7098 | NamedDecl *Specialized, | |||
7099 | NamedDecl *PrevDecl, | |||
7100 | SourceLocation Loc, | |||
7101 | bool IsPartialSpecialization) { | |||
7102 | // Keep these "kind" numbers in sync with the %select statements in the | |||
7103 | // various diagnostics emitted by this routine. | |||
7104 | int EntityKind = 0; | |||
7105 | if (isa<ClassTemplateDecl>(Specialized)) | |||
7106 | EntityKind = IsPartialSpecialization? 1 : 0; | |||
7107 | else if (isa<VarTemplateDecl>(Specialized)) | |||
7108 | EntityKind = IsPartialSpecialization ? 3 : 2; | |||
7109 | else if (isa<FunctionTemplateDecl>(Specialized)) | |||
7110 | EntityKind = 4; | |||
7111 | else if (isa<CXXMethodDecl>(Specialized)) | |||
7112 | EntityKind = 5; | |||
7113 | else if (isa<VarDecl>(Specialized)) | |||
7114 | EntityKind = 6; | |||
7115 | else if (isa<RecordDecl>(Specialized)) | |||
7116 | EntityKind = 7; | |||
7117 | else if (isa<EnumDecl>(Specialized) && S.getLangOpts().CPlusPlus11) | |||
7118 | EntityKind = 8; | |||
7119 | else { | |||
7120 | S.Diag(Loc, diag::err_template_spec_unknown_kind) | |||
7121 | << S.getLangOpts().CPlusPlus11; | |||
7122 | S.Diag(Specialized->getLocation(), diag::note_specialized_entity); | |||
7123 | return true; | |||
7124 | } | |||
7125 | ||||
7126 | // C++ [temp.expl.spec]p2: | |||
7127 | // An explicit specialization may be declared in any scope in which | |||
7128 | // the corresponding primary template may be defined. | |||
7129 | if (S.CurContext->getRedeclContext()->isFunctionOrMethod()) { | |||
7130 | S.Diag(Loc, diag::err_template_spec_decl_function_scope) | |||
7131 | << Specialized; | |||
7132 | return true; | |||
7133 | } | |||
7134 | ||||
7135 | // C++ [temp.class.spec]p6: | |||
7136 | // A class template partial specialization may be declared in any | |||
7137 | // scope in which the primary template may be defined. | |||
7138 | DeclContext *SpecializedContext = | |||
7139 | Specialized->getDeclContext()->getRedeclContext(); | |||
7140 | DeclContext *DC = S.CurContext->getRedeclContext(); | |||
7141 | ||||
7142 | // Make sure that this redeclaration (or definition) occurs in the same | |||
7143 | // scope or an enclosing namespace. | |||
7144 | if (!(DC->isFileContext() ? DC->Encloses(SpecializedContext) | |||
7145 | : DC->Equals(SpecializedContext))) { | |||
7146 | if (isa<TranslationUnitDecl>(SpecializedContext)) | |||
7147 | S.Diag(Loc, diag::err_template_spec_redecl_global_scope) | |||
7148 | << EntityKind << Specialized; | |||
7149 | else { | |||
7150 | auto *ND = cast<NamedDecl>(SpecializedContext); | |||
7151 | int Diag = diag::err_template_spec_redecl_out_of_scope; | |||
7152 | if (S.getLangOpts().MicrosoftExt && !DC->isRecord()) | |||
7153 | Diag = diag::ext_ms_template_spec_redecl_out_of_scope; | |||
7154 | S.Diag(Loc, Diag) << EntityKind << Specialized | |||
7155 | << ND << isa<CXXRecordDecl>(ND); | |||
7156 | } | |||
7157 | ||||
7158 | S.Diag(Specialized->getLocation(), diag::note_specialized_entity); | |||
7159 | ||||
7160 | // Don't allow specializing in the wrong class during error recovery. | |||
7161 | // Otherwise, things can go horribly wrong. | |||
7162 | if (DC->isRecord()) | |||
7163 | return true; | |||
7164 | } | |||
7165 | ||||
7166 | return false; | |||
7167 | } | |||
7168 | ||||
7169 | static SourceRange findTemplateParameterInType(unsigned Depth, Expr *E) { | |||
7170 | if (!E->isTypeDependent()) | |||
7171 | return SourceLocation(); | |||
7172 | DependencyChecker Checker(Depth, /*IgnoreNonTypeDependent*/true); | |||
7173 | Checker.TraverseStmt(E); | |||
7174 | if (Checker.MatchLoc.isInvalid()) | |||
7175 | return E->getSourceRange(); | |||
7176 | return Checker.MatchLoc; | |||
7177 | } | |||
7178 | ||||
7179 | static SourceRange findTemplateParameter(unsigned Depth, TypeLoc TL) { | |||
7180 | if (!TL.getType()->isDependentType()) | |||
7181 | return SourceLocation(); | |||
7182 | DependencyChecker Checker(Depth, /*IgnoreNonTypeDependent*/true); | |||
7183 | Checker.TraverseTypeLoc(TL); | |||
7184 | if (Checker.MatchLoc.isInvalid()) | |||
7185 | return TL.getSourceRange(); | |||
7186 | return Checker.MatchLoc; | |||
7187 | } | |||
7188 | ||||
7189 | /// \brief Subroutine of Sema::CheckTemplatePartialSpecializationArgs | |||
7190 | /// that checks non-type template partial specialization arguments. | |||
7191 | static bool CheckNonTypeTemplatePartialSpecializationArgs( | |||
7192 | Sema &S, SourceLocation TemplateNameLoc, NonTypeTemplateParmDecl *Param, | |||
7193 | const TemplateArgument *Args, unsigned NumArgs, bool IsDefaultArgument) { | |||
7194 | for (unsigned I = 0; I != NumArgs; ++I) { | |||
7195 | if (Args[I].getKind() == TemplateArgument::Pack) { | |||
7196 | if (CheckNonTypeTemplatePartialSpecializationArgs( | |||
7197 | S, TemplateNameLoc, Param, Args[I].pack_begin(), | |||
7198 | Args[I].pack_size(), IsDefaultArgument)) | |||
7199 | return true; | |||
7200 | ||||
7201 | continue; | |||
7202 | } | |||
7203 | ||||
7204 | if (Args[I].getKind() != TemplateArgument::Expression) | |||
7205 | continue; | |||
7206 | ||||
7207 | Expr *ArgExpr = Args[I].getAsExpr(); | |||
7208 | ||||
7209 | // We can have a pack expansion of any of the bullets below. | |||
7210 | if (PackExpansionExpr *Expansion = dyn_cast<PackExpansionExpr>(ArgExpr)) | |||
7211 | ArgExpr = Expansion->getPattern(); | |||
7212 | ||||
7213 | // Strip off any implicit casts we added as part of type checking. | |||
7214 | while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(ArgExpr)) | |||
7215 | ArgExpr = ICE->getSubExpr(); | |||
7216 | ||||
7217 | // C++ [temp.class.spec]p8: | |||
7218 | // A non-type argument is non-specialized if it is the name of a | |||
7219 | // non-type parameter. All other non-type arguments are | |||
7220 | // specialized. | |||
7221 | // | |||
7222 | // Below, we check the two conditions that only apply to | |||
7223 | // specialized non-type arguments, so skip any non-specialized | |||
7224 | // arguments. | |||
7225 | if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ArgExpr)) | |||
7226 | if (isa<NonTypeTemplateParmDecl>(DRE->getDecl())) | |||
7227 | continue; | |||
7228 | ||||
7229 | // C++ [temp.class.spec]p9: | |||
7230 | // Within the argument list of a class template partial | |||
7231 | // specialization, the following restrictions apply: | |||
7232 | // -- A partially specialized non-type argument expression | |||
7233 | // shall not involve a template parameter of the partial | |||
7234 | // specialization except when the argument expression is a | |||
7235 | // simple identifier. | |||
7236 | // -- The type of a template parameter corresponding to a | |||
7237 | // specialized non-type argument shall not be dependent on a | |||
7238 | // parameter of the specialization. | |||
7239 | // DR1315 removes the first bullet, leaving an incoherent set of rules. | |||
7240 | // We implement a compromise between the original rules and DR1315: | |||
7241 | // -- A specialized non-type template argument shall not be | |||
7242 | // type-dependent and the corresponding template parameter | |||
7243 | // shall have a non-dependent type. | |||
7244 | SourceRange ParamUseRange = | |||
7245 | findTemplateParameterInType(Param->getDepth(), ArgExpr); | |||
7246 | if (ParamUseRange.isValid()) { | |||
7247 | if (IsDefaultArgument) { | |||
7248 | S.Diag(TemplateNameLoc, | |||
7249 | diag::err_dependent_non_type_arg_in_partial_spec); | |||
7250 | S.Diag(ParamUseRange.getBegin(), | |||
7251 | diag::note_dependent_non_type_default_arg_in_partial_spec) | |||
7252 | << ParamUseRange; | |||
7253 | } else { | |||
7254 | S.Diag(ParamUseRange.getBegin(), | |||
7255 | diag::err_dependent_non_type_arg_in_partial_spec) | |||
7256 | << ParamUseRange; | |||
7257 | } | |||
7258 | return true; | |||
7259 | } | |||
7260 | ||||
7261 | ParamUseRange = findTemplateParameter( | |||
7262 | Param->getDepth(), Param->getTypeSourceInfo()->getTypeLoc()); | |||
7263 | if (ParamUseRange.isValid()) { | |||
7264 | S.Diag(IsDefaultArgument ? TemplateNameLoc : ArgExpr->getLocStart(), | |||
7265 | diag::err_dependent_typed_non_type_arg_in_partial_spec) | |||
7266 | << Param->getType(); | |||
7267 | S.Diag(Param->getLocation(), diag::note_template_param_here) | |||
7268 | << (IsDefaultArgument ? ParamUseRange : SourceRange()) | |||
7269 | << ParamUseRange; | |||
7270 | return true; | |||
7271 | } | |||
7272 | } | |||
7273 | ||||
7274 | return false; | |||
7275 | } | |||
7276 | ||||
7277 | /// \brief Check the non-type template arguments of a class template | |||
7278 | /// partial specialization according to C++ [temp.class.spec]p9. | |||
7279 | /// | |||
7280 | /// \param TemplateNameLoc the location of the template name. | |||
7281 | /// \param PrimaryTemplate the template parameters of the primary class | |||
7282 | /// template. | |||
7283 | /// \param NumExplicit the number of explicitly-specified template arguments. | |||
7284 | /// \param TemplateArgs the template arguments of the class template | |||
7285 | /// partial specialization. | |||
7286 | /// | |||
7287 | /// \returns \c true if there was an error, \c false otherwise. | |||
7288 | bool Sema::CheckTemplatePartialSpecializationArgs( | |||
7289 | SourceLocation TemplateNameLoc, TemplateDecl *PrimaryTemplate, | |||
7290 | unsigned NumExplicit, ArrayRef<TemplateArgument> TemplateArgs) { | |||
7291 | // We have to be conservative when checking a template in a dependent | |||
7292 | // context. | |||
7293 | if (PrimaryTemplate->getDeclContext()->isDependentContext()) | |||
7294 | return false; | |||
7295 | ||||
7296 | TemplateParameterList *TemplateParams = | |||
7297 | PrimaryTemplate->getTemplateParameters(); | |||
7298 | for (unsigned I = 0, N = TemplateParams->size(); I != N; ++I) { | |||
7299 | NonTypeTemplateParmDecl *Param | |||
7300 | = dyn_cast<NonTypeTemplateParmDecl>(TemplateParams->getParam(I)); | |||
7301 | if (!Param) | |||
7302 | continue; | |||
7303 | ||||
7304 | if (CheckNonTypeTemplatePartialSpecializationArgs(*this, TemplateNameLoc, | |||
7305 | Param, &TemplateArgs[I], | |||
7306 | 1, I >= NumExplicit)) | |||
7307 | return true; | |||
7308 | } | |||
7309 | ||||
7310 | return false; | |||
7311 | } | |||
7312 | ||||
7313 | DeclResult | |||
7314 | Sema::ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, | |||
7315 | TagUseKind TUK, | |||
7316 | SourceLocation KWLoc, | |||
7317 | SourceLocation ModulePrivateLoc, | |||
7318 | TemplateIdAnnotation &TemplateId, | |||
7319 | AttributeList *Attr, | |||
7320 | MultiTemplateParamsArg | |||
7321 | TemplateParameterLists, | |||
7322 | SkipBodyInfo *SkipBody) { | |||
7323 | assert(TUK != TUK_Reference && "References are not specializations")(static_cast <bool> (TUK != TUK_Reference && "References are not specializations" ) ? void (0) : __assert_fail ("TUK != TUK_Reference && \"References are not specializations\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 7323, __extension__ __PRETTY_FUNCTION__)); | |||
7324 | ||||
7325 | CXXScopeSpec &SS = TemplateId.SS; | |||
7326 | ||||
7327 | // NOTE: KWLoc is the location of the tag keyword. This will instead | |||
7328 | // store the location of the outermost template keyword in the declaration. | |||
7329 | SourceLocation TemplateKWLoc = TemplateParameterLists.size() > 0 | |||
7330 | ? TemplateParameterLists[0]->getTemplateLoc() : KWLoc; | |||
7331 | SourceLocation TemplateNameLoc = TemplateId.TemplateNameLoc; | |||
7332 | SourceLocation LAngleLoc = TemplateId.LAngleLoc; | |||
7333 | SourceLocation RAngleLoc = TemplateId.RAngleLoc; | |||
7334 | ||||
7335 | // Find the class template we're specializing | |||
7336 | TemplateName Name = TemplateId.Template.get(); | |||
7337 | ClassTemplateDecl *ClassTemplate | |||
7338 | = dyn_cast_or_null<ClassTemplateDecl>(Name.getAsTemplateDecl()); | |||
7339 | ||||
7340 | if (!ClassTemplate) { | |||
7341 | Diag(TemplateNameLoc, diag::err_not_class_template_specialization) | |||
7342 | << (Name.getAsTemplateDecl() && | |||
7343 | isa<TemplateTemplateParmDecl>(Name.getAsTemplateDecl())); | |||
7344 | return true; | |||
7345 | } | |||
7346 | ||||
7347 | bool isMemberSpecialization = false; | |||
7348 | bool isPartialSpecialization = false; | |||
7349 | ||||
7350 | // Check the validity of the template headers that introduce this | |||
7351 | // template. | |||
7352 | // FIXME: We probably shouldn't complain about these headers for | |||
7353 | // friend declarations. | |||
7354 | bool Invalid = false; | |||
7355 | TemplateParameterList *TemplateParams = | |||
7356 | MatchTemplateParametersToScopeSpecifier( | |||
7357 | KWLoc, TemplateNameLoc, SS, &TemplateId, | |||
7358 | TemplateParameterLists, TUK == TUK_Friend, isMemberSpecialization, | |||
7359 | Invalid); | |||
7360 | if (Invalid) | |||
7361 | return true; | |||
7362 | ||||
7363 | if (TemplateParams && TemplateParams->size() > 0) { | |||
7364 | isPartialSpecialization = true; | |||
7365 | ||||
7366 | if (TUK == TUK_Friend) { | |||
7367 | Diag(KWLoc, diag::err_partial_specialization_friend) | |||
7368 | << SourceRange(LAngleLoc, RAngleLoc); | |||
7369 | return true; | |||
7370 | } | |||
7371 | ||||
7372 | // C++ [temp.class.spec]p10: | |||
7373 | // The template parameter list of a specialization shall not | |||
7374 | // contain default template argument values. | |||
7375 | for (unsigned I = 0, N = TemplateParams->size(); I != N; ++I) { | |||
7376 | Decl *Param = TemplateParams->getParam(I); | |||
7377 | if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(Param)) { | |||
7378 | if (TTP->hasDefaultArgument()) { | |||
7379 | Diag(TTP->getDefaultArgumentLoc(), | |||
7380 | diag::err_default_arg_in_partial_spec); | |||
7381 | TTP->removeDefaultArgument(); | |||
7382 | } | |||
7383 | } else if (NonTypeTemplateParmDecl *NTTP | |||
7384 | = dyn_cast<NonTypeTemplateParmDecl>(Param)) { | |||
7385 | if (Expr *DefArg = NTTP->getDefaultArgument()) { | |||
7386 | Diag(NTTP->getDefaultArgumentLoc(), | |||
7387 | diag::err_default_arg_in_partial_spec) | |||
7388 | << DefArg->getSourceRange(); | |||
7389 | NTTP->removeDefaultArgument(); | |||
7390 | } | |||
7391 | } else { | |||
7392 | TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(Param); | |||
7393 | if (TTP->hasDefaultArgument()) { | |||
7394 | Diag(TTP->getDefaultArgument().getLocation(), | |||
7395 | diag::err_default_arg_in_partial_spec) | |||
7396 | << TTP->getDefaultArgument().getSourceRange(); | |||
7397 | TTP->removeDefaultArgument(); | |||
7398 | } | |||
7399 | } | |||
7400 | } | |||
7401 | } else if (TemplateParams) { | |||
7402 | if (TUK == TUK_Friend) | |||
7403 | Diag(KWLoc, diag::err_template_spec_friend) | |||
7404 | << FixItHint::CreateRemoval( | |||
7405 | SourceRange(TemplateParams->getTemplateLoc(), | |||
7406 | TemplateParams->getRAngleLoc())) | |||
7407 | << SourceRange(LAngleLoc, RAngleLoc); | |||
7408 | } else { | |||
7409 | assert(TUK == TUK_Friend && "should have a 'template<>' for this decl")(static_cast <bool> (TUK == TUK_Friend && "should have a 'template<>' for this decl" ) ? void (0) : __assert_fail ("TUK == TUK_Friend && \"should have a 'template<>' for this decl\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 7409, __extension__ __PRETTY_FUNCTION__)); | |||
7410 | } | |||
7411 | ||||
7412 | // Check that the specialization uses the same tag kind as the | |||
7413 | // original template. | |||
7414 | TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec); | |||
7415 | assert(Kind != TTK_Enum && "Invalid enum tag in class template spec!")(static_cast <bool> (Kind != TTK_Enum && "Invalid enum tag in class template spec!" ) ? void (0) : __assert_fail ("Kind != TTK_Enum && \"Invalid enum tag in class template spec!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 7415, __extension__ __PRETTY_FUNCTION__)); | |||
7416 | if (!isAcceptableTagRedeclaration(ClassTemplate->getTemplatedDecl(), | |||
7417 | Kind, TUK == TUK_Definition, KWLoc, | |||
7418 | ClassTemplate->getIdentifier())) { | |||
7419 | Diag(KWLoc, diag::err_use_with_wrong_tag) | |||
7420 | << ClassTemplate | |||
7421 | << FixItHint::CreateReplacement(KWLoc, | |||
7422 | ClassTemplate->getTemplatedDecl()->getKindName()); | |||
7423 | Diag(ClassTemplate->getTemplatedDecl()->getLocation(), | |||
7424 | diag::note_previous_use); | |||
7425 | Kind = ClassTemplate->getTemplatedDecl()->getTagKind(); | |||
7426 | } | |||
7427 | ||||
7428 | // Translate the parser's template argument list in our AST format. | |||
7429 | TemplateArgumentListInfo TemplateArgs = | |||
7430 | makeTemplateArgumentListInfo(*this, TemplateId); | |||
7431 | ||||
7432 | // Check for unexpanded parameter packs in any of the template arguments. | |||
7433 | for (unsigned I = 0, N = TemplateArgs.size(); I != N; ++I) | |||
7434 | if (DiagnoseUnexpandedParameterPack(TemplateArgs[I], | |||
7435 | UPPC_PartialSpecialization)) | |||
7436 | return true; | |||
7437 | ||||
7438 | // Check that the template argument list is well-formed for this | |||
7439 | // template. | |||
7440 | SmallVector<TemplateArgument, 4> Converted; | |||
7441 | if (CheckTemplateArgumentList(ClassTemplate, TemplateNameLoc, | |||
7442 | TemplateArgs, false, Converted)) | |||
7443 | return true; | |||
7444 | ||||
7445 | // Find the class template (partial) specialization declaration that | |||
7446 | // corresponds to these arguments. | |||
7447 | if (isPartialSpecialization) { | |||
7448 | if (CheckTemplatePartialSpecializationArgs(TemplateNameLoc, ClassTemplate, | |||
7449 | TemplateArgs.size(), Converted)) | |||
7450 | return true; | |||
7451 | ||||
7452 | // FIXME: Move this to CheckTemplatePartialSpecializationArgs so we | |||
7453 | // also do it during instantiation. | |||
7454 | bool InstantiationDependent; | |||
7455 | if (!Name.isDependent() && | |||
7456 | !TemplateSpecializationType::anyDependentTemplateArguments( | |||
7457 | TemplateArgs.arguments(), InstantiationDependent)) { | |||
7458 | Diag(TemplateNameLoc, diag::err_partial_spec_fully_specialized) | |||
7459 | << ClassTemplate->getDeclName(); | |||
7460 | isPartialSpecialization = false; | |||
7461 | } | |||
7462 | } | |||
7463 | ||||
7464 | void *InsertPos = nullptr; | |||
7465 | ClassTemplateSpecializationDecl *PrevDecl = nullptr; | |||
7466 | ||||
7467 | if (isPartialSpecialization) | |||
7468 | // FIXME: Template parameter list matters, too | |||
7469 | PrevDecl = ClassTemplate->findPartialSpecialization(Converted, InsertPos); | |||
7470 | else | |||
7471 | PrevDecl = ClassTemplate->findSpecialization(Converted, InsertPos); | |||
7472 | ||||
7473 | ClassTemplateSpecializationDecl *Specialization = nullptr; | |||
7474 | ||||
7475 | // Check whether we can declare a class template specialization in | |||
7476 | // the current scope. | |||
7477 | if (TUK != TUK_Friend && | |||
7478 | CheckTemplateSpecializationScope(*this, ClassTemplate, PrevDecl, | |||
7479 | TemplateNameLoc, | |||
7480 | isPartialSpecialization)) | |||
7481 | return true; | |||
7482 | ||||
7483 | // The canonical type | |||
7484 | QualType CanonType; | |||
7485 | if (isPartialSpecialization) { | |||
7486 | // Build the canonical type that describes the converted template | |||
7487 | // arguments of the class template partial specialization. | |||
7488 | TemplateName CanonTemplate = Context.getCanonicalTemplateName(Name); | |||
7489 | CanonType = Context.getTemplateSpecializationType(CanonTemplate, | |||
7490 | Converted); | |||
7491 | ||||
7492 | if (Context.hasSameType(CanonType, | |||
7493 | ClassTemplate->getInjectedClassNameSpecialization())) { | |||
7494 | // C++ [temp.class.spec]p9b3: | |||
7495 | // | |||
7496 | // -- The argument list of the specialization shall not be identical | |||
7497 | // to the implicit argument list of the primary template. | |||
7498 | // | |||
7499 | // This rule has since been removed, because it's redundant given DR1495, | |||
7500 | // but we keep it because it produces better diagnostics and recovery. | |||
7501 | Diag(TemplateNameLoc, diag::err_partial_spec_args_match_primary_template) | |||
7502 | << /*class template*/0 << (TUK == TUK_Definition) | |||
7503 | << FixItHint::CreateRemoval(SourceRange(LAngleLoc, RAngleLoc)); | |||
7504 | return CheckClassTemplate(S, TagSpec, TUK, KWLoc, SS, | |||
7505 | ClassTemplate->getIdentifier(), | |||
7506 | TemplateNameLoc, | |||
7507 | Attr, | |||
7508 | TemplateParams, | |||
7509 | AS_none, /*ModulePrivateLoc=*/SourceLocation(), | |||
7510 | /*FriendLoc*/SourceLocation(), | |||
7511 | TemplateParameterLists.size() - 1, | |||
7512 | TemplateParameterLists.data()); | |||
7513 | } | |||
7514 | ||||
7515 | // Create a new class template partial specialization declaration node. | |||
7516 | ClassTemplatePartialSpecializationDecl *PrevPartial | |||
7517 | = cast_or_null<ClassTemplatePartialSpecializationDecl>(PrevDecl); | |||
7518 | ClassTemplatePartialSpecializationDecl *Partial | |||
7519 | = ClassTemplatePartialSpecializationDecl::Create(Context, Kind, | |||
7520 | ClassTemplate->getDeclContext(), | |||
7521 | KWLoc, TemplateNameLoc, | |||
7522 | TemplateParams, | |||
7523 | ClassTemplate, | |||
7524 | Converted, | |||
7525 | TemplateArgs, | |||
7526 | CanonType, | |||
7527 | PrevPartial); | |||
7528 | SetNestedNameSpecifier(Partial, SS); | |||
7529 | if (TemplateParameterLists.size() > 1 && SS.isSet()) { | |||
7530 | Partial->setTemplateParameterListsInfo( | |||
7531 | Context, TemplateParameterLists.drop_back(1)); | |||
7532 | } | |||
7533 | ||||
7534 | if (!PrevPartial) | |||
7535 | ClassTemplate->AddPartialSpecialization(Partial, InsertPos); | |||
7536 | Specialization = Partial; | |||
7537 | ||||
7538 | // If we are providing an explicit specialization of a member class | |||
7539 | // template specialization, make a note of that. | |||
7540 | if (PrevPartial && PrevPartial->getInstantiatedFromMember()) | |||
7541 | PrevPartial->setMemberSpecialization(); | |||
7542 | ||||
7543 | CheckTemplatePartialSpecialization(Partial); | |||
7544 | } else { | |||
7545 | // Create a new class template specialization declaration node for | |||
7546 | // this explicit specialization or friend declaration. | |||
7547 | Specialization | |||
7548 | = ClassTemplateSpecializationDecl::Create(Context, Kind, | |||
7549 | ClassTemplate->getDeclContext(), | |||
7550 | KWLoc, TemplateNameLoc, | |||
7551 | ClassTemplate, | |||
7552 | Converted, | |||
7553 | PrevDecl); | |||
7554 | SetNestedNameSpecifier(Specialization, SS); | |||
7555 | if (TemplateParameterLists.size() > 0) { | |||
7556 | Specialization->setTemplateParameterListsInfo(Context, | |||
7557 | TemplateParameterLists); | |||
7558 | } | |||
7559 | ||||
7560 | if (!PrevDecl) | |||
7561 | ClassTemplate->AddSpecialization(Specialization, InsertPos); | |||
7562 | ||||
7563 | if (CurContext->isDependentContext()) { | |||
7564 | // -fms-extensions permits specialization of nested classes without | |||
7565 | // fully specializing the outer class(es). | |||
7566 | assert(getLangOpts().MicrosoftExt &&(static_cast <bool> (getLangOpts().MicrosoftExt && "Only possible with -fms-extensions!") ? void (0) : __assert_fail ("getLangOpts().MicrosoftExt && \"Only possible with -fms-extensions!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 7567, __extension__ __PRETTY_FUNCTION__)) | |||
7567 | "Only possible with -fms-extensions!")(static_cast <bool> (getLangOpts().MicrosoftExt && "Only possible with -fms-extensions!") ? void (0) : __assert_fail ("getLangOpts().MicrosoftExt && \"Only possible with -fms-extensions!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 7567, __extension__ __PRETTY_FUNCTION__)); | |||
7568 | TemplateName CanonTemplate = Context.getCanonicalTemplateName(Name); | |||
7569 | CanonType = Context.getTemplateSpecializationType( | |||
7570 | CanonTemplate, Converted); | |||
7571 | } else { | |||
7572 | CanonType = Context.getTypeDeclType(Specialization); | |||
7573 | } | |||
7574 | } | |||
7575 | ||||
7576 | // C++ [temp.expl.spec]p6: | |||
7577 | // If a template, a member template or the member of a class template is | |||
7578 | // explicitly specialized then that specialization shall be declared | |||
7579 | // before the first use of that specialization that would cause an implicit | |||
7580 | // instantiation to take place, in every translation unit in which such a | |||
7581 | // use occurs; no diagnostic is required. | |||
7582 | if (PrevDecl && PrevDecl->getPointOfInstantiation().isValid()) { | |||
7583 | bool Okay = false; | |||
7584 | for (Decl *Prev = PrevDecl; Prev; Prev = Prev->getPreviousDecl()) { | |||
7585 | // Is there any previous explicit specialization declaration? | |||
7586 | if (getTemplateSpecializationKind(Prev) == TSK_ExplicitSpecialization) { | |||
7587 | Okay = true; | |||
7588 | break; | |||
7589 | } | |||
7590 | } | |||
7591 | ||||
7592 | if (!Okay) { | |||
7593 | SourceRange Range(TemplateNameLoc, RAngleLoc); | |||
7594 | Diag(TemplateNameLoc, diag::err_specialization_after_instantiation) | |||
7595 | << Context.getTypeDeclType(Specialization) << Range; | |||
7596 | ||||
7597 | Diag(PrevDecl->getPointOfInstantiation(), | |||
7598 | diag::note_instantiation_required_here) | |||
7599 | << (PrevDecl->getTemplateSpecializationKind() | |||
7600 | != TSK_ImplicitInstantiation); | |||
7601 | return true; | |||
7602 | } | |||
7603 | } | |||
7604 | ||||
7605 | // If this is not a friend, note that this is an explicit specialization. | |||
7606 | if (TUK != TUK_Friend) | |||
7607 | Specialization->setSpecializationKind(TSK_ExplicitSpecialization); | |||
7608 | ||||
7609 | // Check that this isn't a redefinition of this specialization. | |||
7610 | if (TUK == TUK_Definition) { | |||
7611 | RecordDecl *Def = Specialization->getDefinition(); | |||
7612 | NamedDecl *Hidden = nullptr; | |||
7613 | if (Def && SkipBody && !hasVisibleDefinition(Def, &Hidden)) { | |||
7614 | SkipBody->ShouldSkip = true; | |||
7615 | makeMergedDefinitionVisible(Hidden); | |||
7616 | // From here on out, treat this as just a redeclaration. | |||
7617 | TUK = TUK_Declaration; | |||
7618 | } else if (Def) { | |||
7619 | SourceRange Range(TemplateNameLoc, RAngleLoc); | |||
7620 | Diag(TemplateNameLoc, diag::err_redefinition) << Specialization << Range; | |||
7621 | Diag(Def->getLocation(), diag::note_previous_definition); | |||
7622 | Specialization->setInvalidDecl(); | |||
7623 | return true; | |||
7624 | } | |||
7625 | } | |||
7626 | ||||
7627 | if (Attr) | |||
7628 | ProcessDeclAttributeList(S, Specialization, Attr); | |||
7629 | ||||
7630 | // Add alignment attributes if necessary; these attributes are checked when | |||
7631 | // the ASTContext lays out the structure. | |||
7632 | if (TUK == TUK_Definition) { | |||
7633 | AddAlignmentAttributesForRecord(Specialization); | |||
7634 | AddMsStructLayoutForRecord(Specialization); | |||
7635 | } | |||
7636 | ||||
7637 | if (ModulePrivateLoc.isValid()) | |||
7638 | Diag(Specialization->getLocation(), diag::err_module_private_specialization) | |||
7639 | << (isPartialSpecialization? 1 : 0) | |||
7640 | << FixItHint::CreateRemoval(ModulePrivateLoc); | |||
7641 | ||||
7642 | // Build the fully-sugared type for this class template | |||
7643 | // specialization as the user wrote in the specialization | |||
7644 | // itself. This means that we'll pretty-print the type retrieved | |||
7645 | // from the specialization's declaration the way that the user | |||
7646 | // actually wrote the specialization, rather than formatting the | |||
7647 | // name based on the "canonical" representation used to store the | |||
7648 | // template arguments in the specialization. | |||
7649 | TypeSourceInfo *WrittenTy | |||
7650 | = Context.getTemplateSpecializationTypeInfo(Name, TemplateNameLoc, | |||
7651 | TemplateArgs, CanonType); | |||
7652 | if (TUK != TUK_Friend) { | |||
7653 | Specialization->setTypeAsWritten(WrittenTy); | |||
7654 | Specialization->setTemplateKeywordLoc(TemplateKWLoc); | |||
7655 | } | |||
7656 | ||||
7657 | // C++ [temp.expl.spec]p9: | |||
7658 | // A template explicit specialization is in the scope of the | |||
7659 | // namespace in which the template was defined. | |||
7660 | // | |||
7661 | // We actually implement this paragraph where we set the semantic | |||
7662 | // context (in the creation of the ClassTemplateSpecializationDecl), | |||
7663 | // but we also maintain the lexical context where the actual | |||
7664 | // definition occurs. | |||
7665 | Specialization->setLexicalDeclContext(CurContext); | |||
7666 | ||||
7667 | // We may be starting the definition of this specialization. | |||
7668 | if (TUK == TUK_Definition) | |||
7669 | Specialization->startDefinition(); | |||
7670 | ||||
7671 | if (TUK == TUK_Friend) { | |||
7672 | FriendDecl *Friend = FriendDecl::Create(Context, CurContext, | |||
7673 | TemplateNameLoc, | |||
7674 | WrittenTy, | |||
7675 | /*FIXME:*/KWLoc); | |||
7676 | Friend->setAccess(AS_public); | |||
7677 | CurContext->addDecl(Friend); | |||
7678 | } else { | |||
7679 | // Add the specialization into its lexical context, so that it can | |||
7680 | // be seen when iterating through the list of declarations in that | |||
7681 | // context. However, specializations are not found by name lookup. | |||
7682 | CurContext->addDecl(Specialization); | |||
7683 | } | |||
7684 | return Specialization; | |||
7685 | } | |||
7686 | ||||
7687 | Decl *Sema::ActOnTemplateDeclarator(Scope *S, | |||
7688 | MultiTemplateParamsArg TemplateParameterLists, | |||
7689 | Declarator &D) { | |||
7690 | Decl *NewDecl = HandleDeclarator(S, D, TemplateParameterLists); | |||
7691 | ActOnDocumentableDecl(NewDecl); | |||
7692 | return NewDecl; | |||
7693 | } | |||
7694 | ||||
7695 | /// \brief Strips various properties off an implicit instantiation | |||
7696 | /// that has just been explicitly specialized. | |||
7697 | static void StripImplicitInstantiation(NamedDecl *D) { | |||
7698 | D->dropAttr<DLLImportAttr>(); | |||
7699 | D->dropAttr<DLLExportAttr>(); | |||
7700 | ||||
7701 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) | |||
7702 | FD->setInlineSpecified(false); | |||
7703 | } | |||
7704 | ||||
7705 | /// \brief Compute the diagnostic location for an explicit instantiation | |||
7706 | // declaration or definition. | |||
7707 | static SourceLocation DiagLocForExplicitInstantiation( | |||
7708 | NamedDecl* D, SourceLocation PointOfInstantiation) { | |||
7709 | // Explicit instantiations following a specialization have no effect and | |||
7710 | // hence no PointOfInstantiation. In that case, walk decl backwards | |||
7711 | // until a valid name loc is found. | |||
7712 | SourceLocation PrevDiagLoc = PointOfInstantiation; | |||
7713 | for (Decl *Prev = D; Prev && !PrevDiagLoc.isValid(); | |||
7714 | Prev = Prev->getPreviousDecl()) { | |||
7715 | PrevDiagLoc = Prev->getLocation(); | |||
7716 | } | |||
7717 | assert(PrevDiagLoc.isValid() &&(static_cast <bool> (PrevDiagLoc.isValid() && "Explicit instantiation without point of instantiation?" ) ? void (0) : __assert_fail ("PrevDiagLoc.isValid() && \"Explicit instantiation without point of instantiation?\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 7718, __extension__ __PRETTY_FUNCTION__)) | |||
7718 | "Explicit instantiation without point of instantiation?")(static_cast <bool> (PrevDiagLoc.isValid() && "Explicit instantiation without point of instantiation?" ) ? void (0) : __assert_fail ("PrevDiagLoc.isValid() && \"Explicit instantiation without point of instantiation?\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 7718, __extension__ __PRETTY_FUNCTION__)); | |||
7719 | return PrevDiagLoc; | |||
7720 | } | |||
7721 | ||||
7722 | /// \brief Diagnose cases where we have an explicit template specialization | |||
7723 | /// before/after an explicit template instantiation, producing diagnostics | |||
7724 | /// for those cases where they are required and determining whether the | |||
7725 | /// new specialization/instantiation will have any effect. | |||
7726 | /// | |||
7727 | /// \param NewLoc the location of the new explicit specialization or | |||
7728 | /// instantiation. | |||
7729 | /// | |||
7730 | /// \param NewTSK the kind of the new explicit specialization or instantiation. | |||
7731 | /// | |||
7732 | /// \param PrevDecl the previous declaration of the entity. | |||
7733 | /// | |||
7734 | /// \param PrevTSK the kind of the old explicit specialization or instantiatin. | |||
7735 | /// | |||
7736 | /// \param PrevPointOfInstantiation if valid, indicates where the previus | |||
7737 | /// declaration was instantiated (either implicitly or explicitly). | |||
7738 | /// | |||
7739 | /// \param HasNoEffect will be set to true to indicate that the new | |||
7740 | /// specialization or instantiation has no effect and should be ignored. | |||
7741 | /// | |||
7742 | /// \returns true if there was an error that should prevent the introduction of | |||
7743 | /// the new declaration into the AST, false otherwise. | |||
7744 | bool | |||
7745 | Sema::CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, | |||
7746 | TemplateSpecializationKind NewTSK, | |||
7747 | NamedDecl *PrevDecl, | |||
7748 | TemplateSpecializationKind PrevTSK, | |||
7749 | SourceLocation PrevPointOfInstantiation, | |||
7750 | bool &HasNoEffect) { | |||
7751 | HasNoEffect = false; | |||
7752 | ||||
7753 | switch (NewTSK) { | |||
7754 | case TSK_Undeclared: | |||
7755 | case TSK_ImplicitInstantiation: | |||
7756 | assert((static_cast <bool> ((PrevTSK == TSK_Undeclared || PrevTSK == TSK_ImplicitInstantiation) && "previous declaration must be implicit!" ) ? void (0) : __assert_fail ("(PrevTSK == TSK_Undeclared || PrevTSK == TSK_ImplicitInstantiation) && \"previous declaration must be implicit!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 7758, __extension__ __PRETTY_FUNCTION__)) | |||
7757 | (PrevTSK == TSK_Undeclared || PrevTSK == TSK_ImplicitInstantiation) &&(static_cast <bool> ((PrevTSK == TSK_Undeclared || PrevTSK == TSK_ImplicitInstantiation) && "previous declaration must be implicit!" ) ? void (0) : __assert_fail ("(PrevTSK == TSK_Undeclared || PrevTSK == TSK_ImplicitInstantiation) && \"previous declaration must be implicit!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 7758, __extension__ __PRETTY_FUNCTION__)) | |||
7758 | "previous declaration must be implicit!")(static_cast <bool> ((PrevTSK == TSK_Undeclared || PrevTSK == TSK_ImplicitInstantiation) && "previous declaration must be implicit!" ) ? void (0) : __assert_fail ("(PrevTSK == TSK_Undeclared || PrevTSK == TSK_ImplicitInstantiation) && \"previous declaration must be implicit!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 7758, __extension__ __PRETTY_FUNCTION__)); | |||
7759 | return false; | |||
7760 | ||||
7761 | case TSK_ExplicitSpecialization: | |||
7762 | switch (PrevTSK) { | |||
7763 | case TSK_Undeclared: | |||
7764 | case TSK_ExplicitSpecialization: | |||
7765 | // Okay, we're just specializing something that is either already | |||
7766 | // explicitly specialized or has merely been mentioned without any | |||
7767 | // instantiation. | |||
7768 | return false; | |||
7769 | ||||
7770 | case TSK_ImplicitInstantiation: | |||
7771 | if (PrevPointOfInstantiation.isInvalid()) { | |||
7772 | // The declaration itself has not actually been instantiated, so it is | |||
7773 | // still okay to specialize it. | |||
7774 | StripImplicitInstantiation(PrevDecl); | |||
7775 | return false; | |||
7776 | } | |||
7777 | // Fall through | |||
7778 | LLVM_FALLTHROUGH[[clang::fallthrough]]; | |||
7779 | ||||
7780 | case TSK_ExplicitInstantiationDeclaration: | |||
7781 | case TSK_ExplicitInstantiationDefinition: | |||
7782 | assert((PrevTSK == TSK_ImplicitInstantiation ||(static_cast <bool> ((PrevTSK == TSK_ImplicitInstantiation || PrevPointOfInstantiation.isValid()) && "Explicit instantiation without point of instantiation?" ) ? void (0) : __assert_fail ("(PrevTSK == TSK_ImplicitInstantiation || PrevPointOfInstantiation.isValid()) && \"Explicit instantiation without point of instantiation?\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 7784, __extension__ __PRETTY_FUNCTION__)) | |||
7783 | PrevPointOfInstantiation.isValid()) &&(static_cast <bool> ((PrevTSK == TSK_ImplicitInstantiation || PrevPointOfInstantiation.isValid()) && "Explicit instantiation without point of instantiation?" ) ? void (0) : __assert_fail ("(PrevTSK == TSK_ImplicitInstantiation || PrevPointOfInstantiation.isValid()) && \"Explicit instantiation without point of instantiation?\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 7784, __extension__ __PRETTY_FUNCTION__)) | |||
7784 | "Explicit instantiation without point of instantiation?")(static_cast <bool> ((PrevTSK == TSK_ImplicitInstantiation || PrevPointOfInstantiation.isValid()) && "Explicit instantiation without point of instantiation?" ) ? void (0) : __assert_fail ("(PrevTSK == TSK_ImplicitInstantiation || PrevPointOfInstantiation.isValid()) && \"Explicit instantiation without point of instantiation?\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 7784, __extension__ __PRETTY_FUNCTION__)); | |||
7785 | ||||
7786 | // C++ [temp.expl.spec]p6: | |||
7787 | // If a template, a member template or the member of a class template | |||
7788 | // is explicitly specialized then that specialization shall be declared | |||
7789 | // before the first use of that specialization that would cause an | |||
7790 | // implicit instantiation to take place, in every translation unit in | |||
7791 | // which such a use occurs; no diagnostic is required. | |||
7792 | for (Decl *Prev = PrevDecl; Prev; Prev = Prev->getPreviousDecl()) { | |||
7793 | // Is there any previous explicit specialization declaration? | |||
7794 | if (getTemplateSpecializationKind(Prev) == TSK_ExplicitSpecialization) | |||
7795 | return false; | |||
7796 | } | |||
7797 | ||||
7798 | Diag(NewLoc, diag::err_specialization_after_instantiation) | |||
7799 | << PrevDecl; | |||
7800 | Diag(PrevPointOfInstantiation, diag::note_instantiation_required_here) | |||
7801 | << (PrevTSK != TSK_ImplicitInstantiation); | |||
7802 | ||||
7803 | return true; | |||
7804 | } | |||
7805 | llvm_unreachable("The switch over PrevTSK must be exhaustive.")::llvm::llvm_unreachable_internal("The switch over PrevTSK must be exhaustive." , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 7805); | |||
7806 | ||||
7807 | case TSK_ExplicitInstantiationDeclaration: | |||
7808 | switch (PrevTSK) { | |||
7809 | case TSK_ExplicitInstantiationDeclaration: | |||
7810 | // This explicit instantiation declaration is redundant (that's okay). | |||
7811 | HasNoEffect = true; | |||
7812 | return false; | |||
7813 | ||||
7814 | case TSK_Undeclared: | |||
7815 | case TSK_ImplicitInstantiation: | |||
7816 | // We're explicitly instantiating something that may have already been | |||
7817 | // implicitly instantiated; that's fine. | |||
7818 | return false; | |||
7819 | ||||
7820 | case TSK_ExplicitSpecialization: | |||
7821 | // C++0x [temp.explicit]p4: | |||
7822 | // For a given set of template parameters, if an explicit instantiation | |||
7823 | // of a template appears after a declaration of an explicit | |||
7824 | // specialization for that template, the explicit instantiation has no | |||
7825 | // effect. | |||
7826 | HasNoEffect = true; | |||
7827 | return false; | |||
7828 | ||||
7829 | case TSK_ExplicitInstantiationDefinition: | |||
7830 | // C++0x [temp.explicit]p10: | |||
7831 | // If an entity is the subject of both an explicit instantiation | |||
7832 | // declaration and an explicit instantiation definition in the same | |||
7833 | // translation unit, the definition shall follow the declaration. | |||
7834 | Diag(NewLoc, | |||
7835 | diag::err_explicit_instantiation_declaration_after_definition); | |||
7836 | ||||
7837 | // Explicit instantiations following a specialization have no effect and | |||
7838 | // hence no PrevPointOfInstantiation. In that case, walk decl backwards | |||
7839 | // until a valid name loc is found. | |||
7840 | Diag(DiagLocForExplicitInstantiation(PrevDecl, PrevPointOfInstantiation), | |||
7841 | diag::note_explicit_instantiation_definition_here); | |||
7842 | HasNoEffect = true; | |||
7843 | return false; | |||
7844 | } | |||
7845 | ||||
7846 | case TSK_ExplicitInstantiationDefinition: | |||
7847 | switch (PrevTSK) { | |||
7848 | case TSK_Undeclared: | |||
7849 | case TSK_ImplicitInstantiation: | |||
7850 | // We're explicitly instantiating something that may have already been | |||
7851 | // implicitly instantiated; that's fine. | |||
7852 | return false; | |||
7853 | ||||
7854 | case TSK_ExplicitSpecialization: | |||
7855 | // C++ DR 259, C++0x [temp.explicit]p4: | |||
7856 | // For a given set of template parameters, if an explicit | |||
7857 | // instantiation of a template appears after a declaration of | |||
7858 | // an explicit specialization for that template, the explicit | |||
7859 | // instantiation has no effect. | |||
7860 | Diag(NewLoc, diag::warn_explicit_instantiation_after_specialization) | |||
7861 | << PrevDecl; | |||
7862 | Diag(PrevDecl->getLocation(), | |||
7863 | diag::note_previous_template_specialization); | |||
7864 | HasNoEffect = true; | |||
7865 | return false; | |||
7866 | ||||
7867 | case TSK_ExplicitInstantiationDeclaration: | |||
7868 | // We're explicitly instantiating a definition for something for which we | |||
7869 | // were previously asked to suppress instantiations. That's fine. | |||
7870 | ||||
7871 | // C++0x [temp.explicit]p4: | |||
7872 | // For a given set of template parameters, if an explicit instantiation | |||
7873 | // of a template appears after a declaration of an explicit | |||
7874 | // specialization for that template, the explicit instantiation has no | |||
7875 | // effect. | |||
7876 | for (Decl *Prev = PrevDecl; Prev; Prev = Prev->getPreviousDecl()) { | |||
7877 | // Is there any previous explicit specialization declaration? | |||
7878 | if (getTemplateSpecializationKind(Prev) == TSK_ExplicitSpecialization) { | |||
7879 | HasNoEffect = true; | |||
7880 | break; | |||
7881 | } | |||
7882 | } | |||
7883 | ||||
7884 | return false; | |||
7885 | ||||
7886 | case TSK_ExplicitInstantiationDefinition: | |||
7887 | // C++0x [temp.spec]p5: | |||
7888 | // For a given template and a given set of template-arguments, | |||
7889 | // - an explicit instantiation definition shall appear at most once | |||
7890 | // in a program, | |||
7891 | ||||
7892 | // MSVCCompat: MSVC silently ignores duplicate explicit instantiations. | |||
7893 | Diag(NewLoc, (getLangOpts().MSVCCompat) | |||
7894 | ? diag::ext_explicit_instantiation_duplicate | |||
7895 | : diag::err_explicit_instantiation_duplicate) | |||
7896 | << PrevDecl; | |||
7897 | Diag(DiagLocForExplicitInstantiation(PrevDecl, PrevPointOfInstantiation), | |||
7898 | diag::note_previous_explicit_instantiation); | |||
7899 | HasNoEffect = true; | |||
7900 | return false; | |||
7901 | } | |||
7902 | } | |||
7903 | ||||
7904 | llvm_unreachable("Missing specialization/instantiation case?")::llvm::llvm_unreachable_internal("Missing specialization/instantiation case?" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 7904); | |||
7905 | } | |||
7906 | ||||
7907 | /// \brief Perform semantic analysis for the given dependent function | |||
7908 | /// template specialization. | |||
7909 | /// | |||
7910 | /// The only possible way to get a dependent function template specialization | |||
7911 | /// is with a friend declaration, like so: | |||
7912 | /// | |||
7913 | /// \code | |||
7914 | /// template \<class T> void foo(T); | |||
7915 | /// template \<class T> class A { | |||
7916 | /// friend void foo<>(T); | |||
7917 | /// }; | |||
7918 | /// \endcode | |||
7919 | /// | |||
7920 | /// There really isn't any useful analysis we can do here, so we | |||
7921 | /// just store the information. | |||
7922 | bool | |||
7923 | Sema::CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, | |||
7924 | const TemplateArgumentListInfo &ExplicitTemplateArgs, | |||
7925 | LookupResult &Previous) { | |||
7926 | // Remove anything from Previous that isn't a function template in | |||
7927 | // the correct context. | |||
7928 | DeclContext *FDLookupContext = FD->getDeclContext()->getRedeclContext(); | |||
7929 | LookupResult::Filter F = Previous.makeFilter(); | |||
7930 | while (F.hasNext()) { | |||
7931 | NamedDecl *D = F.next()->getUnderlyingDecl(); | |||
7932 | if (!isa<FunctionTemplateDecl>(D) || | |||
7933 | !FDLookupContext->InEnclosingNamespaceSetOf( | |||
7934 | D->getDeclContext()->getRedeclContext())) | |||
7935 | F.erase(); | |||
7936 | } | |||
7937 | F.done(); | |||
7938 | ||||
7939 | // Should this be diagnosed here? | |||
7940 | if (Previous.empty()) return true; | |||
7941 | ||||
7942 | FD->setDependentTemplateSpecialization(Context, Previous.asUnresolvedSet(), | |||
7943 | ExplicitTemplateArgs); | |||
7944 | return false; | |||
7945 | } | |||
7946 | ||||
7947 | /// \brief Perform semantic analysis for the given function template | |||
7948 | /// specialization. | |||
7949 | /// | |||
7950 | /// This routine performs all of the semantic analysis required for an | |||
7951 | /// explicit function template specialization. On successful completion, | |||
7952 | /// the function declaration \p FD will become a function template | |||
7953 | /// specialization. | |||
7954 | /// | |||
7955 | /// \param FD the function declaration, which will be updated to become a | |||
7956 | /// function template specialization. | |||
7957 | /// | |||
7958 | /// \param ExplicitTemplateArgs the explicitly-provided template arguments, | |||
7959 | /// if any. Note that this may be valid info even when 0 arguments are | |||
7960 | /// explicitly provided as in, e.g., \c void sort<>(char*, char*); | |||
7961 | /// as it anyway contains info on the angle brackets locations. | |||
7962 | /// | |||
7963 | /// \param Previous the set of declarations that may be specialized by | |||
7964 | /// this function specialization. | |||
7965 | bool Sema::CheckFunctionTemplateSpecialization( | |||
7966 | FunctionDecl *FD, TemplateArgumentListInfo *ExplicitTemplateArgs, | |||
7967 | LookupResult &Previous) { | |||
7968 | // The set of function template specializations that could match this | |||
7969 | // explicit function template specialization. | |||
7970 | UnresolvedSet<8> Candidates; | |||
7971 | TemplateSpecCandidateSet FailedCandidates(FD->getLocation(), | |||
7972 | /*ForTakingAddress=*/false); | |||
7973 | ||||
7974 | llvm::SmallDenseMap<FunctionDecl *, TemplateArgumentListInfo, 8> | |||
7975 | ConvertedTemplateArgs; | |||
7976 | ||||
7977 | DeclContext *FDLookupContext = FD->getDeclContext()->getRedeclContext(); | |||
7978 | for (LookupResult::iterator I = Previous.begin(), E = Previous.end(); | |||
| ||||
7979 | I != E; ++I) { | |||
7980 | NamedDecl *Ovl = (*I)->getUnderlyingDecl(); | |||
7981 | if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(Ovl)) { | |||
7982 | // Only consider templates found within the same semantic lookup scope as | |||
7983 | // FD. | |||
7984 | if (!FDLookupContext->InEnclosingNamespaceSetOf( | |||
7985 | Ovl->getDeclContext()->getRedeclContext())) | |||
7986 | continue; | |||
7987 | ||||
7988 | // When matching a constexpr member function template specialization | |||
7989 | // against the primary template, we don't yet know whether the | |||
7990 | // specialization has an implicit 'const' (because we don't know whether | |||
7991 | // it will be a static member function until we know which template it | |||
7992 | // specializes), so adjust it now assuming it specializes this template. | |||
7993 | QualType FT = FD->getType(); | |||
7994 | if (FD->isConstexpr()) { | |||
7995 | CXXMethodDecl *OldMD = | |||
7996 | dyn_cast<CXXMethodDecl>(FunTmpl->getTemplatedDecl()); | |||
7997 | if (OldMD && OldMD->isConst()) { | |||
7998 | const FunctionProtoType *FPT = FT->castAs<FunctionProtoType>(); | |||
7999 | FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); | |||
8000 | EPI.TypeQuals |= Qualifiers::Const; | |||
8001 | FT = Context.getFunctionType(FPT->getReturnType(), | |||
8002 | FPT->getParamTypes(), EPI); | |||
8003 | } | |||
8004 | } | |||
8005 | ||||
8006 | TemplateArgumentListInfo Args; | |||
8007 | if (ExplicitTemplateArgs) | |||
8008 | Args = *ExplicitTemplateArgs; | |||
8009 | ||||
8010 | // C++ [temp.expl.spec]p11: | |||
8011 | // A trailing template-argument can be left unspecified in the | |||
8012 | // template-id naming an explicit function template specialization | |||
8013 | // provided it can be deduced from the function argument type. | |||
8014 | // Perform template argument deduction to determine whether we may be | |||
8015 | // specializing this template. | |||
8016 | // FIXME: It is somewhat wasteful to build | |||
8017 | TemplateDeductionInfo Info(FailedCandidates.getLocation()); | |||
8018 | FunctionDecl *Specialization = nullptr; | |||
8019 | if (TemplateDeductionResult TDK = DeduceTemplateArguments( | |||
8020 | cast<FunctionTemplateDecl>(FunTmpl->getFirstDecl()), | |||
8021 | ExplicitTemplateArgs ? &Args : nullptr, FT, Specialization, | |||
8022 | Info)) { | |||
8023 | // Template argument deduction failed; record why it failed, so | |||
8024 | // that we can provide nifty diagnostics. | |||
8025 | FailedCandidates.addCandidate().set( | |||
8026 | I.getPair(), FunTmpl->getTemplatedDecl(), | |||
8027 | MakeDeductionFailureInfo(Context, TDK, Info)); | |||
8028 | (void)TDK; | |||
8029 | continue; | |||
8030 | } | |||
8031 | ||||
8032 | // Target attributes are part of the cuda function signature, so | |||
8033 | // the deduced template's cuda target must match that of the | |||
8034 | // specialization. Given that C++ template deduction does not | |||
8035 | // take target attributes into account, we reject candidates | |||
8036 | // here that have a different target. | |||
8037 | if (LangOpts.CUDA && | |||
8038 | IdentifyCUDATarget(Specialization, | |||
8039 | /* IgnoreImplicitHDAttributes = */ true) != | |||
8040 | IdentifyCUDATarget(FD, /* IgnoreImplicitHDAttributes = */ true)) { | |||
8041 | FailedCandidates.addCandidate().set( | |||
8042 | I.getPair(), FunTmpl->getTemplatedDecl(), | |||
8043 | MakeDeductionFailureInfo(Context, TDK_CUDATargetMismatch, Info)); | |||
8044 | continue; | |||
8045 | } | |||
8046 | ||||
8047 | // Record this candidate. | |||
8048 | if (ExplicitTemplateArgs) | |||
8049 | ConvertedTemplateArgs[Specialization] = std::move(Args); | |||
8050 | Candidates.addDecl(Specialization, I.getAccess()); | |||
8051 | } | |||
8052 | } | |||
8053 | ||||
8054 | // Find the most specialized function template. | |||
8055 | UnresolvedSetIterator Result = getMostSpecialized( | |||
8056 | Candidates.begin(), Candidates.end(), FailedCandidates, | |||
8057 | FD->getLocation(), | |||
8058 | PDiag(diag::err_function_template_spec_no_match) << FD->getDeclName(), | |||
8059 | PDiag(diag::err_function_template_spec_ambiguous) | |||
8060 | << FD->getDeclName() << (ExplicitTemplateArgs != nullptr), | |||
8061 | PDiag(diag::note_function_template_spec_matched)); | |||
8062 | ||||
8063 | if (Result == Candidates.end()) | |||
8064 | return true; | |||
8065 | ||||
8066 | // Ignore access information; it doesn't figure into redeclaration checking. | |||
8067 | FunctionDecl *Specialization = cast<FunctionDecl>(*Result); | |||
8068 | ||||
8069 | FunctionTemplateSpecializationInfo *SpecInfo | |||
8070 | = Specialization->getTemplateSpecializationInfo(); | |||
8071 | assert(SpecInfo && "Function template specialization info missing?")(static_cast <bool> (SpecInfo && "Function template specialization info missing?" ) ? void (0) : __assert_fail ("SpecInfo && \"Function template specialization info missing?\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 8071, __extension__ __PRETTY_FUNCTION__)); | |||
8072 | ||||
8073 | // Note: do not overwrite location info if previous template | |||
8074 | // specialization kind was explicit. | |||
8075 | TemplateSpecializationKind TSK = SpecInfo->getTemplateSpecializationKind(); | |||
8076 | if (TSK == TSK_Undeclared || TSK == TSK_ImplicitInstantiation) { | |||
8077 | Specialization->setLocation(FD->getLocation()); | |||
8078 | Specialization->setLexicalDeclContext(FD->getLexicalDeclContext()); | |||
8079 | // C++11 [dcl.constexpr]p1: An explicit specialization of a constexpr | |||
8080 | // function can differ from the template declaration with respect to | |||
8081 | // the constexpr specifier. | |||
8082 | // FIXME: We need an update record for this AST mutation. | |||
8083 | // FIXME: What if there are multiple such prior declarations (for instance, | |||
8084 | // from different modules)? | |||
8085 | Specialization->setConstexpr(FD->isConstexpr()); | |||
8086 | } | |||
8087 | ||||
8088 | // FIXME: Check if the prior specialization has a point of instantiation. | |||
8089 | // If so, we have run afoul of . | |||
8090 | ||||
8091 | // If this is a friend declaration, then we're not really declaring | |||
8092 | // an explicit specialization. | |||
8093 | bool isFriend = (FD->getFriendObjectKind() != Decl::FOK_None); | |||
8094 | ||||
8095 | // Check the scope of this explicit specialization. | |||
8096 | if (!isFriend && | |||
8097 | CheckTemplateSpecializationScope(*this, | |||
8098 | Specialization->getPrimaryTemplate(), | |||
8099 | Specialization, FD->getLocation(), | |||
8100 | false)) | |||
8101 | return true; | |||
8102 | ||||
8103 | // C++ [temp.expl.spec]p6: | |||
8104 | // If a template, a member template or the member of a class template is | |||
8105 | // explicitly specialized then that specialization shall be declared | |||
8106 | // before the first use of that specialization that would cause an implicit | |||
8107 | // instantiation to take place, in every translation unit in which such a | |||
8108 | // use occurs; no diagnostic is required. | |||
8109 | bool HasNoEffect = false; | |||
8110 | if (!isFriend && | |||
8111 | CheckSpecializationInstantiationRedecl(FD->getLocation(), | |||
8112 | TSK_ExplicitSpecialization, | |||
8113 | Specialization, | |||
8114 | SpecInfo->getTemplateSpecializationKind(), | |||
8115 | SpecInfo->getPointOfInstantiation(), | |||
8116 | HasNoEffect)) | |||
8117 | return true; | |||
8118 | ||||
8119 | // Mark the prior declaration as an explicit specialization, so that later | |||
8120 | // clients know that this is an explicit specialization. | |||
8121 | if (!isFriend) { | |||
8122 | // Since explicit specializations do not inherit '=delete' from their | |||
8123 | // primary function template - check if the 'specialization' that was | |||
8124 | // implicitly generated (during template argument deduction for partial | |||
8125 | // ordering) from the most specialized of all the function templates that | |||
8126 | // 'FD' could have been specializing, has a 'deleted' definition. If so, | |||
8127 | // first check that it was implicitly generated during template argument | |||
8128 | // deduction by making sure it wasn't referenced, and then reset the deleted | |||
8129 | // flag to not-deleted, so that we can inherit that information from 'FD'. | |||
8130 | if (Specialization->isDeleted() && !SpecInfo->isExplicitSpecialization() && | |||
8131 | !Specialization->getCanonicalDecl()->isReferenced()) { | |||
8132 | // FIXME: This assert will not hold in the presence of modules. | |||
8133 | assert((static_cast <bool> (Specialization->getCanonicalDecl () == Specialization && "This must be the only existing declaration of this specialization" ) ? void (0) : __assert_fail ("Specialization->getCanonicalDecl() == Specialization && \"This must be the only existing declaration of this specialization\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 8135, __extension__ __PRETTY_FUNCTION__)) | |||
8134 | Specialization->getCanonicalDecl() == Specialization &&(static_cast <bool> (Specialization->getCanonicalDecl () == Specialization && "This must be the only existing declaration of this specialization" ) ? void (0) : __assert_fail ("Specialization->getCanonicalDecl() == Specialization && \"This must be the only existing declaration of this specialization\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 8135, __extension__ __PRETTY_FUNCTION__)) | |||
8135 | "This must be the only existing declaration of this specialization")(static_cast <bool> (Specialization->getCanonicalDecl () == Specialization && "This must be the only existing declaration of this specialization" ) ? void (0) : __assert_fail ("Specialization->getCanonicalDecl() == Specialization && \"This must be the only existing declaration of this specialization\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 8135, __extension__ __PRETTY_FUNCTION__)); | |||
8136 | // FIXME: We need an update record for this AST mutation. | |||
8137 | Specialization->setDeletedAsWritten(false); | |||
8138 | } | |||
8139 | // FIXME: We need an update record for this AST mutation. | |||
8140 | SpecInfo->setTemplateSpecializationKind(TSK_ExplicitSpecialization); | |||
8141 | MarkUnusedFileScopedDecl(Specialization); | |||
8142 | } | |||
8143 | ||||
8144 | // Turn the given function declaration into a function template | |||
8145 | // specialization, with the template arguments from the previous | |||
8146 | // specialization. | |||
8147 | // Take copies of (semantic and syntactic) template argument lists. | |||
8148 | const TemplateArgumentList* TemplArgs = new (Context) | |||
8149 | TemplateArgumentList(Specialization->getTemplateSpecializationArgs()); | |||
8150 | FD->setFunctionTemplateSpecialization( | |||
8151 | Specialization->getPrimaryTemplate(), TemplArgs, /*InsertPos=*/nullptr, | |||
8152 | SpecInfo->getTemplateSpecializationKind(), | |||
8153 | ExplicitTemplateArgs ? &ConvertedTemplateArgs[Specialization] : nullptr); | |||
8154 | ||||
8155 | // A function template specialization inherits the target attributes | |||
8156 | // of its template. (We require the attributes explicitly in the | |||
8157 | // code to match, but a template may have implicit attributes by | |||
8158 | // virtue e.g. of being constexpr, and it passes these implicit | |||
8159 | // attributes on to its specializations.) | |||
8160 | if (LangOpts.CUDA) | |||
8161 | inheritCUDATargetAttrs(FD, *Specialization->getPrimaryTemplate()); | |||
8162 | ||||
8163 | // The "previous declaration" for this function template specialization is | |||
8164 | // the prior function template specialization. | |||
8165 | Previous.clear(); | |||
8166 | Previous.addDecl(Specialization); | |||
8167 | return false; | |||
8168 | } | |||
8169 | ||||
8170 | /// \brief Perform semantic analysis for the given non-template member | |||
8171 | /// specialization. | |||
8172 | /// | |||
8173 | /// This routine performs all of the semantic analysis required for an | |||
8174 | /// explicit member function specialization. On successful completion, | |||
8175 | /// the function declaration \p FD will become a member function | |||
8176 | /// specialization. | |||
8177 | /// | |||
8178 | /// \param Member the member declaration, which will be updated to become a | |||
8179 | /// specialization. | |||
8180 | /// | |||
8181 | /// \param Previous the set of declarations, one of which may be specialized | |||
8182 | /// by this function specialization; the set will be modified to contain the | |||
8183 | /// redeclared member. | |||
8184 | bool | |||
8185 | Sema::CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous) { | |||
8186 | assert(!isa<TemplateDecl>(Member) && "Only for non-template members")(static_cast <bool> (!isa<TemplateDecl>(Member) && "Only for non-template members") ? void (0) : __assert_fail ( "!isa<TemplateDecl>(Member) && \"Only for non-template members\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 8186, __extension__ __PRETTY_FUNCTION__)); | |||
8187 | ||||
8188 | // Try to find the member we are instantiating. | |||
8189 | NamedDecl *FoundInstantiation = nullptr; | |||
8190 | NamedDecl *Instantiation = nullptr; | |||
8191 | NamedDecl *InstantiatedFrom = nullptr; | |||
8192 | MemberSpecializationInfo *MSInfo = nullptr; | |||
8193 | ||||
8194 | if (Previous.empty()) { | |||
8195 | // Nowhere to look anyway. | |||
8196 | } else if (FunctionDecl *Function = dyn_cast<FunctionDecl>(Member)) { | |||
8197 | for (LookupResult::iterator I = Previous.begin(), E = Previous.end(); | |||
8198 | I != E; ++I) { | |||
8199 | NamedDecl *D = (*I)->getUnderlyingDecl(); | |||
8200 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) { | |||
8201 | QualType Adjusted = Function->getType(); | |||
8202 | if (!hasExplicitCallingConv(Adjusted)) | |||
8203 | Adjusted = adjustCCAndNoReturn(Adjusted, Method->getType()); | |||
8204 | if (Context.hasSameType(Adjusted, Method->getType())) { | |||
8205 | FoundInstantiation = *I; | |||
8206 | Instantiation = Method; | |||
8207 | InstantiatedFrom = Method->getInstantiatedFromMemberFunction(); | |||
8208 | MSInfo = Method->getMemberSpecializationInfo(); | |||
8209 | break; | |||
8210 | } | |||
8211 | } | |||
8212 | } | |||
8213 | } else if (isa<VarDecl>(Member)) { | |||
8214 | VarDecl *PrevVar; | |||
8215 | if (Previous.isSingleResult() && | |||
8216 | (PrevVar = dyn_cast<VarDecl>(Previous.getFoundDecl()))) | |||
8217 | if (PrevVar->isStaticDataMember()) { | |||
8218 | FoundInstantiation = Previous.getRepresentativeDecl(); | |||
8219 | Instantiation = PrevVar; | |||
8220 | InstantiatedFrom = PrevVar->getInstantiatedFromStaticDataMember(); | |||
8221 | MSInfo = PrevVar->getMemberSpecializationInfo(); | |||
8222 | } | |||
8223 | } else if (isa<RecordDecl>(Member)) { | |||
8224 | CXXRecordDecl *PrevRecord; | |||
8225 | if (Previous.isSingleResult() && | |||
8226 | (PrevRecord = dyn_cast<CXXRecordDecl>(Previous.getFoundDecl()))) { | |||
8227 | FoundInstantiation = Previous.getRepresentativeDecl(); | |||
8228 | Instantiation = PrevRecord; | |||
8229 | InstantiatedFrom = PrevRecord->getInstantiatedFromMemberClass(); | |||
8230 | MSInfo = PrevRecord->getMemberSpecializationInfo(); | |||
8231 | } | |||
8232 | } else if (isa<EnumDecl>(Member)) { | |||
8233 | EnumDecl *PrevEnum; | |||
8234 | if (Previous.isSingleResult() && | |||
8235 | (PrevEnum = dyn_cast<EnumDecl>(Previous.getFoundDecl()))) { | |||
8236 | FoundInstantiation = Previous.getRepresentativeDecl(); | |||
8237 | Instantiation = PrevEnum; | |||
8238 | InstantiatedFrom = PrevEnum->getInstantiatedFromMemberEnum(); | |||
8239 | MSInfo = PrevEnum->getMemberSpecializationInfo(); | |||
8240 | } | |||
8241 | } | |||
8242 | ||||
8243 | if (!Instantiation) { | |||
8244 | // There is no previous declaration that matches. Since member | |||
8245 | // specializations are always out-of-line, the caller will complain about | |||
8246 | // this mismatch later. | |||
8247 | return false; | |||
8248 | } | |||
8249 | ||||
8250 | // A member specialization in a friend declaration isn't really declaring | |||
8251 | // an explicit specialization, just identifying a specific (possibly implicit) | |||
8252 | // specialization. Don't change the template specialization kind. | |||
8253 | // | |||
8254 | // FIXME: Is this really valid? Other compilers reject. | |||
8255 | if (Member->getFriendObjectKind() != Decl::FOK_None) { | |||
8256 | // Preserve instantiation information. | |||
8257 | if (InstantiatedFrom && isa<CXXMethodDecl>(Member)) { | |||
8258 | cast<CXXMethodDecl>(Member)->setInstantiationOfMemberFunction( | |||
8259 | cast<CXXMethodDecl>(InstantiatedFrom), | |||
8260 | cast<CXXMethodDecl>(Instantiation)->getTemplateSpecializationKind()); | |||
8261 | } else if (InstantiatedFrom && isa<CXXRecordDecl>(Member)) { | |||
8262 | cast<CXXRecordDecl>(Member)->setInstantiationOfMemberClass( | |||
8263 | cast<CXXRecordDecl>(InstantiatedFrom), | |||
8264 | cast<CXXRecordDecl>(Instantiation)->getTemplateSpecializationKind()); | |||
8265 | } | |||
8266 | ||||
8267 | Previous.clear(); | |||
8268 | Previous.addDecl(FoundInstantiation); | |||
8269 | return false; | |||
8270 | } | |||
8271 | ||||
8272 | // Make sure that this is a specialization of a member. | |||
8273 | if (!InstantiatedFrom) { | |||
8274 | Diag(Member->getLocation(), diag::err_spec_member_not_instantiated) | |||
8275 | << Member; | |||
8276 | Diag(Instantiation->getLocation(), diag::note_specialized_decl); | |||
8277 | return true; | |||
8278 | } | |||
8279 | ||||
8280 | // C++ [temp.expl.spec]p6: | |||
8281 | // If a template, a member template or the member of a class template is | |||
8282 | // explicitly specialized then that specialization shall be declared | |||
8283 | // before the first use of that specialization that would cause an implicit | |||
8284 | // instantiation to take place, in every translation unit in which such a | |||
8285 | // use occurs; no diagnostic is required. | |||
8286 | assert(MSInfo && "Member specialization info missing?")(static_cast <bool> (MSInfo && "Member specialization info missing?" ) ? void (0) : __assert_fail ("MSInfo && \"Member specialization info missing?\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 8286, __extension__ __PRETTY_FUNCTION__)); | |||
8287 | ||||
8288 | bool HasNoEffect = false; | |||
8289 | if (CheckSpecializationInstantiationRedecl(Member->getLocation(), | |||
8290 | TSK_ExplicitSpecialization, | |||
8291 | Instantiation, | |||
8292 | MSInfo->getTemplateSpecializationKind(), | |||
8293 | MSInfo->getPointOfInstantiation(), | |||
8294 | HasNoEffect)) | |||
8295 | return true; | |||
8296 | ||||
8297 | // Check the scope of this explicit specialization. | |||
8298 | if (CheckTemplateSpecializationScope(*this, | |||
8299 | InstantiatedFrom, | |||
8300 | Instantiation, Member->getLocation(), | |||
8301 | false)) | |||
8302 | return true; | |||
8303 | ||||
8304 | // Note that this member specialization is an "instantiation of" the | |||
8305 | // corresponding member of the original template. | |||
8306 | if (auto *MemberFunction = dyn_cast<FunctionDecl>(Member)) { | |||
8307 | FunctionDecl *InstantiationFunction = cast<FunctionDecl>(Instantiation); | |||
8308 | if (InstantiationFunction->getTemplateSpecializationKind() == | |||
8309 | TSK_ImplicitInstantiation) { | |||
8310 | // Explicit specializations of member functions of class templates do not | |||
8311 | // inherit '=delete' from the member function they are specializing. | |||
8312 | if (InstantiationFunction->isDeleted()) { | |||
8313 | // FIXME: This assert will not hold in the presence of modules. | |||
8314 | assert(InstantiationFunction->getCanonicalDecl() ==(static_cast <bool> (InstantiationFunction->getCanonicalDecl () == InstantiationFunction) ? void (0) : __assert_fail ("InstantiationFunction->getCanonicalDecl() == InstantiationFunction" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 8315, __extension__ __PRETTY_FUNCTION__)) | |||
8315 | InstantiationFunction)(static_cast <bool> (InstantiationFunction->getCanonicalDecl () == InstantiationFunction) ? void (0) : __assert_fail ("InstantiationFunction->getCanonicalDecl() == InstantiationFunction" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 8315, __extension__ __PRETTY_FUNCTION__)); | |||
8316 | // FIXME: We need an update record for this AST mutation. | |||
8317 | InstantiationFunction->setDeletedAsWritten(false); | |||
8318 | } | |||
8319 | } | |||
8320 | ||||
8321 | MemberFunction->setInstantiationOfMemberFunction( | |||
8322 | cast<CXXMethodDecl>(InstantiatedFrom), TSK_ExplicitSpecialization); | |||
8323 | } else if (auto *MemberVar = dyn_cast<VarDecl>(Member)) { | |||
8324 | MemberVar->setInstantiationOfStaticDataMember( | |||
8325 | cast<VarDecl>(InstantiatedFrom), TSK_ExplicitSpecialization); | |||
8326 | } else if (auto *MemberClass = dyn_cast<CXXRecordDecl>(Member)) { | |||
8327 | MemberClass->setInstantiationOfMemberClass( | |||
8328 | cast<CXXRecordDecl>(InstantiatedFrom), TSK_ExplicitSpecialization); | |||
8329 | } else if (auto *MemberEnum = dyn_cast<EnumDecl>(Member)) { | |||
8330 | MemberEnum->setInstantiationOfMemberEnum( | |||
8331 | cast<EnumDecl>(InstantiatedFrom), TSK_ExplicitSpecialization); | |||
8332 | } else { | |||
8333 | llvm_unreachable("unknown member specialization kind")::llvm::llvm_unreachable_internal("unknown member specialization kind" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 8333); | |||
8334 | } | |||
8335 | ||||
8336 | // Save the caller the trouble of having to figure out which declaration | |||
8337 | // this specialization matches. | |||
8338 | Previous.clear(); | |||
8339 | Previous.addDecl(FoundInstantiation); | |||
8340 | return false; | |||
8341 | } | |||
8342 | ||||
8343 | /// Complete the explicit specialization of a member of a class template by | |||
8344 | /// updating the instantiated member to be marked as an explicit specialization. | |||
8345 | /// | |||
8346 | /// \param OrigD The member declaration instantiated from the template. | |||
8347 | /// \param Loc The location of the explicit specialization of the member. | |||
8348 | template<typename DeclT> | |||
8349 | static void completeMemberSpecializationImpl(Sema &S, DeclT *OrigD, | |||
8350 | SourceLocation Loc) { | |||
8351 | if (OrigD->getTemplateSpecializationKind() != TSK_ImplicitInstantiation) | |||
8352 | return; | |||
8353 | ||||
8354 | // FIXME: Inform AST mutation listeners of this AST mutation. | |||
8355 | // FIXME: If there are multiple in-class declarations of the member (from | |||
8356 | // multiple modules, or a declaration and later definition of a member type), | |||
8357 | // should we update all of them? | |||
8358 | OrigD->setTemplateSpecializationKind(TSK_ExplicitSpecialization); | |||
8359 | OrigD->setLocation(Loc); | |||
8360 | } | |||
8361 | ||||
8362 | void Sema::CompleteMemberSpecialization(NamedDecl *Member, | |||
8363 | LookupResult &Previous) { | |||
8364 | NamedDecl *Instantiation = cast<NamedDecl>(Member->getCanonicalDecl()); | |||
8365 | if (Instantiation == Member) | |||
8366 | return; | |||
8367 | ||||
8368 | if (auto *Function = dyn_cast<CXXMethodDecl>(Instantiation)) | |||
8369 | completeMemberSpecializationImpl(*this, Function, Member->getLocation()); | |||
8370 | else if (auto *Var = dyn_cast<VarDecl>(Instantiation)) | |||
8371 | completeMemberSpecializationImpl(*this, Var, Member->getLocation()); | |||
8372 | else if (auto *Record = dyn_cast<CXXRecordDecl>(Instantiation)) | |||
8373 | completeMemberSpecializationImpl(*this, Record, Member->getLocation()); | |||
8374 | else if (auto *Enum = dyn_cast<EnumDecl>(Instantiation)) | |||
8375 | completeMemberSpecializationImpl(*this, Enum, Member->getLocation()); | |||
8376 | else | |||
8377 | llvm_unreachable("unknown member specialization kind")::llvm::llvm_unreachable_internal("unknown member specialization kind" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 8377); | |||
8378 | } | |||
8379 | ||||
8380 | /// \brief Check the scope of an explicit instantiation. | |||
8381 | /// | |||
8382 | /// \returns true if a serious error occurs, false otherwise. | |||
8383 | static bool CheckExplicitInstantiationScope(Sema &S, NamedDecl *D, | |||
8384 | SourceLocation InstLoc, | |||
8385 | bool WasQualifiedName) { | |||
8386 | DeclContext *OrigContext= D->getDeclContext()->getEnclosingNamespaceContext(); | |||
8387 | DeclContext *CurContext = S.CurContext->getRedeclContext(); | |||
8388 | ||||
8389 | if (CurContext->isRecord()) { | |||
8390 | S.Diag(InstLoc, diag::err_explicit_instantiation_in_class) | |||
8391 | << D; | |||
8392 | return true; | |||
8393 | } | |||
8394 | ||||
8395 | // C++11 [temp.explicit]p3: | |||
8396 | // An explicit instantiation shall appear in an enclosing namespace of its | |||
8397 | // template. If the name declared in the explicit instantiation is an | |||
8398 | // unqualified name, the explicit instantiation shall appear in the | |||
8399 | // namespace where its template is declared or, if that namespace is inline | |||
8400 | // (7.3.1), any namespace from its enclosing namespace set. | |||
8401 | // | |||
8402 | // This is DR275, which we do not retroactively apply to C++98/03. | |||
8403 | if (WasQualifiedName) { | |||
8404 | if (CurContext->Encloses(OrigContext)) | |||
8405 | return false; | |||
8406 | } else { | |||
8407 | if (CurContext->InEnclosingNamespaceSetOf(OrigContext)) | |||
8408 | return false; | |||
8409 | } | |||
8410 | ||||
8411 | if (NamespaceDecl *NS = dyn_cast<NamespaceDecl>(OrigContext)) { | |||
8412 | if (WasQualifiedName) | |||
8413 | S.Diag(InstLoc, | |||
8414 | S.getLangOpts().CPlusPlus11? | |||
8415 | diag::err_explicit_instantiation_out_of_scope : | |||
8416 | diag::warn_explicit_instantiation_out_of_scope_0x) | |||
8417 | << D << NS; | |||
8418 | else | |||
8419 | S.Diag(InstLoc, | |||
8420 | S.getLangOpts().CPlusPlus11? | |||
8421 | diag::err_explicit_instantiation_unqualified_wrong_namespace : | |||
8422 | diag::warn_explicit_instantiation_unqualified_wrong_namespace_0x) | |||
8423 | << D << NS; | |||
8424 | } else | |||
8425 | S.Diag(InstLoc, | |||
8426 | S.getLangOpts().CPlusPlus11? | |||
8427 | diag::err_explicit_instantiation_must_be_global : | |||
8428 | diag::warn_explicit_instantiation_must_be_global_0x) | |||
8429 | << D; | |||
8430 | S.Diag(D->getLocation(), diag::note_explicit_instantiation_here); | |||
8431 | return false; | |||
8432 | } | |||
8433 | ||||
8434 | /// \brief Determine whether the given scope specifier has a template-id in it. | |||
8435 | static bool ScopeSpecifierHasTemplateId(const CXXScopeSpec &SS) { | |||
8436 | if (!SS.isSet()) | |||
8437 | return false; | |||
8438 | ||||
8439 | // C++11 [temp.explicit]p3: | |||
8440 | // If the explicit instantiation is for a member function, a member class | |||
8441 | // or a static data member of a class template specialization, the name of | |||
8442 | // the class template specialization in the qualified-id for the member | |||
8443 | // name shall be a simple-template-id. | |||
8444 | // | |||
8445 | // C++98 has the same restriction, just worded differently. | |||
8446 | for (NestedNameSpecifier *NNS = SS.getScopeRep(); NNS; | |||
8447 | NNS = NNS->getPrefix()) | |||
8448 | if (const Type *T = NNS->getAsType()) | |||
8449 | if (isa<TemplateSpecializationType>(T)) | |||
8450 | return true; | |||
8451 | ||||
8452 | return false; | |||
8453 | } | |||
8454 | ||||
8455 | /// Make a dllexport or dllimport attr on a class template specialization take | |||
8456 | /// effect. | |||
8457 | static void dllExportImportClassTemplateSpecialization( | |||
8458 | Sema &S, ClassTemplateSpecializationDecl *Def) { | |||
8459 | auto *A = cast_or_null<InheritableAttr>(getDLLAttr(Def)); | |||
8460 | assert(A && "dllExportImportClassTemplateSpecialization called "(static_cast <bool> (A && "dllExportImportClassTemplateSpecialization called " "on Def without dllexport or dllimport") ? void (0) : __assert_fail ("A && \"dllExportImportClassTemplateSpecialization called \" \"on Def without dllexport or dllimport\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 8461, __extension__ __PRETTY_FUNCTION__)) | |||
8461 | "on Def without dllexport or dllimport")(static_cast <bool> (A && "dllExportImportClassTemplateSpecialization called " "on Def without dllexport or dllimport") ? void (0) : __assert_fail ("A && \"dllExportImportClassTemplateSpecialization called \" \"on Def without dllexport or dllimport\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 8461, __extension__ __PRETTY_FUNCTION__)); | |||
8462 | ||||
8463 | // We reject explicit instantiations in class scope, so there should | |||
8464 | // never be any delayed exported classes to worry about. | |||
8465 | assert(S.DelayedDllExportClasses.empty() &&(static_cast <bool> (S.DelayedDllExportClasses.empty() && "delayed exports present at explicit instantiation") ? void ( 0) : __assert_fail ("S.DelayedDllExportClasses.empty() && \"delayed exports present at explicit instantiation\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 8466, __extension__ __PRETTY_FUNCTION__)) | |||
8466 | "delayed exports present at explicit instantiation")(static_cast <bool> (S.DelayedDllExportClasses.empty() && "delayed exports present at explicit instantiation") ? void ( 0) : __assert_fail ("S.DelayedDllExportClasses.empty() && \"delayed exports present at explicit instantiation\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 8466, __extension__ __PRETTY_FUNCTION__)); | |||
8467 | S.checkClassLevelDLLAttribute(Def); | |||
8468 | ||||
8469 | // Propagate attribute to base class templates. | |||
8470 | for (auto &B : Def->bases()) { | |||
8471 | if (auto *BT = dyn_cast_or_null<ClassTemplateSpecializationDecl>( | |||
8472 | B.getType()->getAsCXXRecordDecl())) | |||
8473 | S.propagateDLLAttrToBaseClassTemplate(Def, A, BT, B.getLocStart()); | |||
8474 | } | |||
8475 | ||||
8476 | S.referenceDLLExportedClassMethods(); | |||
8477 | } | |||
8478 | ||||
8479 | // Explicit instantiation of a class template specialization | |||
8480 | DeclResult | |||
8481 | Sema::ActOnExplicitInstantiation(Scope *S, | |||
8482 | SourceLocation ExternLoc, | |||
8483 | SourceLocation TemplateLoc, | |||
8484 | unsigned TagSpec, | |||
8485 | SourceLocation KWLoc, | |||
8486 | const CXXScopeSpec &SS, | |||
8487 | TemplateTy TemplateD, | |||
8488 | SourceLocation TemplateNameLoc, | |||
8489 | SourceLocation LAngleLoc, | |||
8490 | ASTTemplateArgsPtr TemplateArgsIn, | |||
8491 | SourceLocation RAngleLoc, | |||
8492 | AttributeList *Attr) { | |||
8493 | // Find the class template we're specializing | |||
8494 | TemplateName Name = TemplateD.get(); | |||
8495 | TemplateDecl *TD = Name.getAsTemplateDecl(); | |||
8496 | // Check that the specialization uses the same tag kind as the | |||
8497 | // original template. | |||
8498 | TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec); | |||
8499 | assert(Kind != TTK_Enum &&(static_cast <bool> (Kind != TTK_Enum && "Invalid enum tag in class template explicit instantiation!" ) ? void (0) : __assert_fail ("Kind != TTK_Enum && \"Invalid enum tag in class template explicit instantiation!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 8500, __extension__ __PRETTY_FUNCTION__)) | |||
8500 | "Invalid enum tag in class template explicit instantiation!")(static_cast <bool> (Kind != TTK_Enum && "Invalid enum tag in class template explicit instantiation!" ) ? void (0) : __assert_fail ("Kind != TTK_Enum && \"Invalid enum tag in class template explicit instantiation!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 8500, __extension__ __PRETTY_FUNCTION__)); | |||
8501 | ||||
8502 | ClassTemplateDecl *ClassTemplate = dyn_cast<ClassTemplateDecl>(TD); | |||
8503 | ||||
8504 | if (!ClassTemplate) { | |||
8505 | NonTagKind NTK = getNonTagTypeDeclKind(TD, Kind); | |||
8506 | Diag(TemplateNameLoc, diag::err_tag_reference_non_tag) << TD << NTK << Kind; | |||
8507 | Diag(TD->getLocation(), diag::note_previous_use); | |||
8508 | return true; | |||
8509 | } | |||
8510 | ||||
8511 | if (!isAcceptableTagRedeclaration(ClassTemplate->getTemplatedDecl(), | |||
8512 | Kind, /*isDefinition*/false, KWLoc, | |||
8513 | ClassTemplate->getIdentifier())) { | |||
8514 | Diag(KWLoc, diag::err_use_with_wrong_tag) | |||
8515 | << ClassTemplate | |||
8516 | << FixItHint::CreateReplacement(KWLoc, | |||
8517 | ClassTemplate->getTemplatedDecl()->getKindName()); | |||
8518 | Diag(ClassTemplate->getTemplatedDecl()->getLocation(), | |||
8519 | diag::note_previous_use); | |||
8520 | Kind = ClassTemplate->getTemplatedDecl()->getTagKind(); | |||
8521 | } | |||
8522 | ||||
8523 | // C++0x [temp.explicit]p2: | |||
8524 | // There are two forms of explicit instantiation: an explicit instantiation | |||
8525 | // definition and an explicit instantiation declaration. An explicit | |||
8526 | // instantiation declaration begins with the extern keyword. [...] | |||
8527 | TemplateSpecializationKind TSK = ExternLoc.isInvalid() | |||
8528 | ? TSK_ExplicitInstantiationDefinition | |||
8529 | : TSK_ExplicitInstantiationDeclaration; | |||
8530 | ||||
8531 | if (TSK == TSK_ExplicitInstantiationDeclaration) { | |||
8532 | // Check for dllexport class template instantiation declarations. | |||
8533 | for (AttributeList *A = Attr; A; A = A->getNext()) { | |||
8534 | if (A->getKind() == AttributeList::AT_DLLExport) { | |||
8535 | Diag(ExternLoc, | |||
8536 | diag::warn_attribute_dllexport_explicit_instantiation_decl); | |||
8537 | Diag(A->getLoc(), diag::note_attribute); | |||
8538 | break; | |||
8539 | } | |||
8540 | } | |||
8541 | ||||
8542 | if (auto *A = ClassTemplate->getTemplatedDecl()->getAttr<DLLExportAttr>()) { | |||
8543 | Diag(ExternLoc, | |||
8544 | diag::warn_attribute_dllexport_explicit_instantiation_decl); | |||
8545 | Diag(A->getLocation(), diag::note_attribute); | |||
8546 | } | |||
8547 | } | |||
8548 | ||||
8549 | // In MSVC mode, dllimported explicit instantiation definitions are treated as | |||
8550 | // instantiation declarations for most purposes. | |||
8551 | bool DLLImportExplicitInstantiationDef = false; | |||
8552 | if (TSK == TSK_ExplicitInstantiationDefinition && | |||
8553 | Context.getTargetInfo().getCXXABI().isMicrosoft()) { | |||
8554 | // Check for dllimport class template instantiation definitions. | |||
8555 | bool DLLImport = | |||
8556 | ClassTemplate->getTemplatedDecl()->getAttr<DLLImportAttr>(); | |||
8557 | for (AttributeList *A = Attr; A; A = A->getNext()) { | |||
8558 | if (A->getKind() == AttributeList::AT_DLLImport) | |||
8559 | DLLImport = true; | |||
8560 | if (A->getKind() == AttributeList::AT_DLLExport) { | |||
8561 | // dllexport trumps dllimport here. | |||
8562 | DLLImport = false; | |||
8563 | break; | |||
8564 | } | |||
8565 | } | |||
8566 | if (DLLImport) { | |||
8567 | TSK = TSK_ExplicitInstantiationDeclaration; | |||
8568 | DLLImportExplicitInstantiationDef = true; | |||
8569 | } | |||
8570 | } | |||
8571 | ||||
8572 | // Translate the parser's template argument list in our AST format. | |||
8573 | TemplateArgumentListInfo TemplateArgs(LAngleLoc, RAngleLoc); | |||
8574 | translateTemplateArguments(TemplateArgsIn, TemplateArgs); | |||
8575 | ||||
8576 | // Check that the template argument list is well-formed for this | |||
8577 | // template. | |||
8578 | SmallVector<TemplateArgument, 4> Converted; | |||
8579 | if (CheckTemplateArgumentList(ClassTemplate, TemplateNameLoc, | |||
8580 | TemplateArgs, false, Converted)) | |||
8581 | return true; | |||
8582 | ||||
8583 | // Find the class template specialization declaration that | |||
8584 | // corresponds to these arguments. | |||
8585 | void *InsertPos = nullptr; | |||
8586 | ClassTemplateSpecializationDecl *PrevDecl | |||
8587 | = ClassTemplate->findSpecialization(Converted, InsertPos); | |||
8588 | ||||
8589 | TemplateSpecializationKind PrevDecl_TSK | |||
8590 | = PrevDecl ? PrevDecl->getTemplateSpecializationKind() : TSK_Undeclared; | |||
8591 | ||||
8592 | // C++0x [temp.explicit]p2: | |||
8593 | // [...] An explicit instantiation shall appear in an enclosing | |||
8594 | // namespace of its template. [...] | |||
8595 | // | |||
8596 | // This is C++ DR 275. | |||
8597 | if (CheckExplicitInstantiationScope(*this, ClassTemplate, TemplateNameLoc, | |||
8598 | SS.isSet())) | |||
8599 | return true; | |||
8600 | ||||
8601 | ClassTemplateSpecializationDecl *Specialization = nullptr; | |||
8602 | ||||
8603 | bool HasNoEffect = false; | |||
8604 | if (PrevDecl) { | |||
8605 | if (CheckSpecializationInstantiationRedecl(TemplateNameLoc, TSK, | |||
8606 | PrevDecl, PrevDecl_TSK, | |||
8607 | PrevDecl->getPointOfInstantiation(), | |||
8608 | HasNoEffect)) | |||
8609 | return PrevDecl; | |||
8610 | ||||
8611 | // Even though HasNoEffect == true means that this explicit instantiation | |||
8612 | // has no effect on semantics, we go on to put its syntax in the AST. | |||
8613 | ||||
8614 | if (PrevDecl_TSK == TSK_ImplicitInstantiation || | |||
8615 | PrevDecl_TSK == TSK_Undeclared) { | |||
8616 | // Since the only prior class template specialization with these | |||
8617 | // arguments was referenced but not declared, reuse that | |||
8618 | // declaration node as our own, updating the source location | |||
8619 | // for the template name to reflect our new declaration. | |||
8620 | // (Other source locations will be updated later.) | |||
8621 | Specialization = PrevDecl; | |||
8622 | Specialization->setLocation(TemplateNameLoc); | |||
8623 | PrevDecl = nullptr; | |||
8624 | } | |||
8625 | ||||
8626 | if (PrevDecl_TSK == TSK_ExplicitInstantiationDeclaration && | |||
8627 | DLLImportExplicitInstantiationDef) { | |||
8628 | // The new specialization might add a dllimport attribute. | |||
8629 | HasNoEffect = false; | |||
8630 | } | |||
8631 | } | |||
8632 | ||||
8633 | if (!Specialization) { | |||
8634 | // Create a new class template specialization declaration node for | |||
8635 | // this explicit specialization. | |||
8636 | Specialization | |||
8637 | = ClassTemplateSpecializationDecl::Create(Context, Kind, | |||
8638 | ClassTemplate->getDeclContext(), | |||
8639 | KWLoc, TemplateNameLoc, | |||
8640 | ClassTemplate, | |||
8641 | Converted, | |||
8642 | PrevDecl); | |||
8643 | SetNestedNameSpecifier(Specialization, SS); | |||
8644 | ||||
8645 | if (!HasNoEffect && !PrevDecl) { | |||
8646 | // Insert the new specialization. | |||
8647 | ClassTemplate->AddSpecialization(Specialization, InsertPos); | |||
8648 | } | |||
8649 | } | |||
8650 | ||||
8651 | // Build the fully-sugared type for this explicit instantiation as | |||
8652 | // the user wrote in the explicit instantiation itself. This means | |||
8653 | // that we'll pretty-print the type retrieved from the | |||
8654 | // specialization's declaration the way that the user actually wrote | |||
8655 | // the explicit instantiation, rather than formatting the name based | |||
8656 | // on the "canonical" representation used to store the template | |||
8657 | // arguments in the specialization. | |||
8658 | TypeSourceInfo *WrittenTy | |||
8659 | = Context.getTemplateSpecializationTypeInfo(Name, TemplateNameLoc, | |||
8660 | TemplateArgs, | |||
8661 | Context.getTypeDeclType(Specialization)); | |||
8662 | Specialization->setTypeAsWritten(WrittenTy); | |||
8663 | ||||
8664 | // Set source locations for keywords. | |||
8665 | Specialization->setExternLoc(ExternLoc); | |||
8666 | Specialization->setTemplateKeywordLoc(TemplateLoc); | |||
8667 | Specialization->setBraceRange(SourceRange()); | |||
8668 | ||||
8669 | bool PreviouslyDLLExported = Specialization->hasAttr<DLLExportAttr>(); | |||
8670 | if (Attr) | |||
8671 | ProcessDeclAttributeList(S, Specialization, Attr); | |||
8672 | ||||
8673 | // Add the explicit instantiation into its lexical context. However, | |||
8674 | // since explicit instantiations are never found by name lookup, we | |||
8675 | // just put it into the declaration context directly. | |||
8676 | Specialization->setLexicalDeclContext(CurContext); | |||
8677 | CurContext->addDecl(Specialization); | |||
8678 | ||||
8679 | // Syntax is now OK, so return if it has no other effect on semantics. | |||
8680 | if (HasNoEffect) { | |||
8681 | // Set the template specialization kind. | |||
8682 | Specialization->setTemplateSpecializationKind(TSK); | |||
8683 | return Specialization; | |||
8684 | } | |||
8685 | ||||
8686 | // C++ [temp.explicit]p3: | |||
8687 | // A definition of a class template or class member template | |||
8688 | // shall be in scope at the point of the explicit instantiation of | |||
8689 | // the class template or class member template. | |||
8690 | // | |||
8691 | // This check comes when we actually try to perform the | |||
8692 | // instantiation. | |||
8693 | ClassTemplateSpecializationDecl *Def | |||
8694 | = cast_or_null<ClassTemplateSpecializationDecl>( | |||
8695 | Specialization->getDefinition()); | |||
8696 | if (!Def) | |||
8697 | InstantiateClassTemplateSpecialization(TemplateNameLoc, Specialization, TSK); | |||
8698 | else if (TSK == TSK_ExplicitInstantiationDefinition) { | |||
8699 | MarkVTableUsed(TemplateNameLoc, Specialization, true); | |||
8700 | Specialization->setPointOfInstantiation(Def->getPointOfInstantiation()); | |||
8701 | } | |||
8702 | ||||
8703 | // Instantiate the members of this class template specialization. | |||
8704 | Def = cast_or_null<ClassTemplateSpecializationDecl>( | |||
8705 | Specialization->getDefinition()); | |||
8706 | if (Def) { | |||
8707 | TemplateSpecializationKind Old_TSK = Def->getTemplateSpecializationKind(); | |||
8708 | // Fix a TSK_ExplicitInstantiationDeclaration followed by a | |||
8709 | // TSK_ExplicitInstantiationDefinition | |||
8710 | if (Old_TSK == TSK_ExplicitInstantiationDeclaration && | |||
8711 | (TSK == TSK_ExplicitInstantiationDefinition || | |||
8712 | DLLImportExplicitInstantiationDef)) { | |||
8713 | // FIXME: Need to notify the ASTMutationListener that we did this. | |||
8714 | Def->setTemplateSpecializationKind(TSK); | |||
8715 | ||||
8716 | if (!getDLLAttr(Def) && getDLLAttr(Specialization) && | |||
8717 | (Context.getTargetInfo().getCXXABI().isMicrosoft() || | |||
8718 | Context.getTargetInfo().getTriple().isWindowsItaniumEnvironment())) { | |||
8719 | // In the MS ABI, an explicit instantiation definition can add a dll | |||
8720 | // attribute to a template with a previous instantiation declaration. | |||
8721 | // MinGW doesn't allow this. | |||
8722 | auto *A = cast<InheritableAttr>( | |||
8723 | getDLLAttr(Specialization)->clone(getASTContext())); | |||
8724 | A->setInherited(true); | |||
8725 | Def->addAttr(A); | |||
8726 | dllExportImportClassTemplateSpecialization(*this, Def); | |||
8727 | } | |||
8728 | } | |||
8729 | ||||
8730 | // Fix a TSK_ImplicitInstantiation followed by a | |||
8731 | // TSK_ExplicitInstantiationDefinition | |||
8732 | bool NewlyDLLExported = | |||
8733 | !PreviouslyDLLExported && Specialization->hasAttr<DLLExportAttr>(); | |||
8734 | if (Old_TSK == TSK_ImplicitInstantiation && NewlyDLLExported && | |||
8735 | (Context.getTargetInfo().getCXXABI().isMicrosoft() || | |||
8736 | Context.getTargetInfo().getTriple().isWindowsItaniumEnvironment())) { | |||
8737 | // In the MS ABI, an explicit instantiation definition can add a dll | |||
8738 | // attribute to a template with a previous implicit instantiation. | |||
8739 | // MinGW doesn't allow this. We limit clang to only adding dllexport, to | |||
8740 | // avoid potentially strange codegen behavior. For example, if we extend | |||
8741 | // this conditional to dllimport, and we have a source file calling a | |||
8742 | // method on an implicitly instantiated template class instance and then | |||
8743 | // declaring a dllimport explicit instantiation definition for the same | |||
8744 | // template class, the codegen for the method call will not respect the | |||
8745 | // dllimport, while it will with cl. The Def will already have the DLL | |||
8746 | // attribute, since the Def and Specialization will be the same in the | |||
8747 | // case of Old_TSK == TSK_ImplicitInstantiation, and we already added the | |||
8748 | // attribute to the Specialization; we just need to make it take effect. | |||
8749 | assert(Def == Specialization &&(static_cast <bool> (Def == Specialization && "Def and Specialization should match for implicit instantiation" ) ? void (0) : __assert_fail ("Def == Specialization && \"Def and Specialization should match for implicit instantiation\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 8750, __extension__ __PRETTY_FUNCTION__)) | |||
8750 | "Def and Specialization should match for implicit instantiation")(static_cast <bool> (Def == Specialization && "Def and Specialization should match for implicit instantiation" ) ? void (0) : __assert_fail ("Def == Specialization && \"Def and Specialization should match for implicit instantiation\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 8750, __extension__ __PRETTY_FUNCTION__)); | |||
8751 | dllExportImportClassTemplateSpecialization(*this, Def); | |||
8752 | } | |||
8753 | ||||
8754 | // Set the template specialization kind. Make sure it is set before | |||
8755 | // instantiating the members which will trigger ASTConsumer callbacks. | |||
8756 | Specialization->setTemplateSpecializationKind(TSK); | |||
8757 | InstantiateClassTemplateSpecializationMembers(TemplateNameLoc, Def, TSK); | |||
8758 | } else { | |||
8759 | ||||
8760 | // Set the template specialization kind. | |||
8761 | Specialization->setTemplateSpecializationKind(TSK); | |||
8762 | } | |||
8763 | ||||
8764 | return Specialization; | |||
8765 | } | |||
8766 | ||||
8767 | // Explicit instantiation of a member class of a class template. | |||
8768 | DeclResult | |||
8769 | Sema::ActOnExplicitInstantiation(Scope *S, | |||
8770 | SourceLocation ExternLoc, | |||
8771 | SourceLocation TemplateLoc, | |||
8772 | unsigned TagSpec, | |||
8773 | SourceLocation KWLoc, | |||
8774 | CXXScopeSpec &SS, | |||
8775 | IdentifierInfo *Name, | |||
8776 | SourceLocation NameLoc, | |||
8777 | AttributeList *Attr) { | |||
8778 | ||||
8779 | bool Owned = false; | |||
8780 | bool IsDependent = false; | |||
8781 | Decl *TagD = ActOnTag(S, TagSpec, Sema::TUK_Reference, | |||
8782 | KWLoc, SS, Name, NameLoc, Attr, AS_none, | |||
8783 | /*ModulePrivateLoc=*/SourceLocation(), | |||
8784 | MultiTemplateParamsArg(), Owned, IsDependent, | |||
8785 | SourceLocation(), false, TypeResult(), | |||
8786 | /*IsTypeSpecifier*/false, | |||
8787 | /*IsTemplateParamOrArg*/false); | |||
8788 | assert(!IsDependent && "explicit instantiation of dependent name not yet handled")(static_cast <bool> (!IsDependent && "explicit instantiation of dependent name not yet handled" ) ? void (0) : __assert_fail ("!IsDependent && \"explicit instantiation of dependent name not yet handled\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 8788, __extension__ __PRETTY_FUNCTION__)); | |||
8789 | ||||
8790 | if (!TagD) | |||
8791 | return true; | |||
8792 | ||||
8793 | TagDecl *Tag = cast<TagDecl>(TagD); | |||
8794 | assert(!Tag->isEnum() && "shouldn't see enumerations here")(static_cast <bool> (!Tag->isEnum() && "shouldn't see enumerations here" ) ? void (0) : __assert_fail ("!Tag->isEnum() && \"shouldn't see enumerations here\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 8794, __extension__ __PRETTY_FUNCTION__)); | |||
8795 | ||||
8796 | if (Tag->isInvalidDecl()) | |||
8797 | return true; | |||
8798 | ||||
8799 | CXXRecordDecl *Record = cast<CXXRecordDecl>(Tag); | |||
8800 | CXXRecordDecl *Pattern = Record->getInstantiatedFromMemberClass(); | |||
8801 | if (!Pattern) { | |||
8802 | Diag(TemplateLoc, diag::err_explicit_instantiation_nontemplate_type) | |||
8803 | << Context.getTypeDeclType(Record); | |||
8804 | Diag(Record->getLocation(), diag::note_nontemplate_decl_here); | |||
8805 | return true; | |||
8806 | } | |||
8807 | ||||
8808 | // C++0x [temp.explicit]p2: | |||
8809 | // If the explicit instantiation is for a class or member class, the | |||
8810 | // elaborated-type-specifier in the declaration shall include a | |||
8811 | // simple-template-id. | |||
8812 | // | |||
8813 | // C++98 has the same restriction, just worded differently. | |||
8814 | if (!ScopeSpecifierHasTemplateId(SS)) | |||
8815 | Diag(TemplateLoc, diag::ext_explicit_instantiation_without_qualified_id) | |||
8816 | << Record << SS.getRange(); | |||
8817 | ||||
8818 | // C++0x [temp.explicit]p2: | |||
8819 | // There are two forms of explicit instantiation: an explicit instantiation | |||
8820 | // definition and an explicit instantiation declaration. An explicit | |||
8821 | // instantiation declaration begins with the extern keyword. [...] | |||
8822 | TemplateSpecializationKind TSK | |||
8823 | = ExternLoc.isInvalid()? TSK_ExplicitInstantiationDefinition | |||
8824 | : TSK_ExplicitInstantiationDeclaration; | |||
8825 | ||||
8826 | // C++0x [temp.explicit]p2: | |||
8827 | // [...] An explicit instantiation shall appear in an enclosing | |||
8828 | // namespace of its template. [...] | |||
8829 | // | |||
8830 | // This is C++ DR 275. | |||
8831 | CheckExplicitInstantiationScope(*this, Record, NameLoc, true); | |||
8832 | ||||
8833 | // Verify that it is okay to explicitly instantiate here. | |||
8834 | CXXRecordDecl *PrevDecl | |||
8835 | = cast_or_null<CXXRecordDecl>(Record->getPreviousDecl()); | |||
8836 | if (!PrevDecl && Record->getDefinition()) | |||
8837 | PrevDecl = Record; | |||
8838 | if (PrevDecl) { | |||
8839 | MemberSpecializationInfo *MSInfo = PrevDecl->getMemberSpecializationInfo(); | |||
8840 | bool HasNoEffect = false; | |||
8841 | assert(MSInfo && "No member specialization information?")(static_cast <bool> (MSInfo && "No member specialization information?" ) ? void (0) : __assert_fail ("MSInfo && \"No member specialization information?\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 8841, __extension__ __PRETTY_FUNCTION__)); | |||
8842 | if (CheckSpecializationInstantiationRedecl(TemplateLoc, TSK, | |||
8843 | PrevDecl, | |||
8844 | MSInfo->getTemplateSpecializationKind(), | |||
8845 | MSInfo->getPointOfInstantiation(), | |||
8846 | HasNoEffect)) | |||
8847 | return true; | |||
8848 | if (HasNoEffect) | |||
8849 | return TagD; | |||
8850 | } | |||
8851 | ||||
8852 | CXXRecordDecl *RecordDef | |||
8853 | = cast_or_null<CXXRecordDecl>(Record->getDefinition()); | |||
8854 | if (!RecordDef) { | |||
8855 | // C++ [temp.explicit]p3: | |||
8856 | // A definition of a member class of a class template shall be in scope | |||
8857 | // at the point of an explicit instantiation of the member class. | |||
8858 | CXXRecordDecl *Def | |||
8859 | = cast_or_null<CXXRecordDecl>(Pattern->getDefinition()); | |||
8860 | if (!Def) { | |||
8861 | Diag(TemplateLoc, diag::err_explicit_instantiation_undefined_member) | |||
8862 | << 0 << Record->getDeclName() << Record->getDeclContext(); | |||
8863 | Diag(Pattern->getLocation(), diag::note_forward_declaration) | |||
8864 | << Pattern; | |||
8865 | return true; | |||
8866 | } else { | |||
8867 | if (InstantiateClass(NameLoc, Record, Def, | |||
8868 | getTemplateInstantiationArgs(Record), | |||
8869 | TSK)) | |||
8870 | return true; | |||
8871 | ||||
8872 | RecordDef = cast_or_null<CXXRecordDecl>(Record->getDefinition()); | |||
8873 | if (!RecordDef) | |||
8874 | return true; | |||
8875 | } | |||
8876 | } | |||
8877 | ||||
8878 | // Instantiate all of the members of the class. | |||
8879 | InstantiateClassMembers(NameLoc, RecordDef, | |||
8880 | getTemplateInstantiationArgs(Record), TSK); | |||
8881 | ||||
8882 | if (TSK == TSK_ExplicitInstantiationDefinition) | |||
8883 | MarkVTableUsed(NameLoc, RecordDef, true); | |||
8884 | ||||
8885 | // FIXME: We don't have any representation for explicit instantiations of | |||
8886 | // member classes. Such a representation is not needed for compilation, but it | |||
8887 | // should be available for clients that want to see all of the declarations in | |||
8888 | // the source code. | |||
8889 | return TagD; | |||
8890 | } | |||
8891 | ||||
8892 | DeclResult Sema::ActOnExplicitInstantiation(Scope *S, | |||
8893 | SourceLocation ExternLoc, | |||
8894 | SourceLocation TemplateLoc, | |||
8895 | Declarator &D) { | |||
8896 | // Explicit instantiations always require a name. | |||
8897 | // TODO: check if/when DNInfo should replace Name. | |||
8898 | DeclarationNameInfo NameInfo = GetNameForDeclarator(D); | |||
8899 | DeclarationName Name = NameInfo.getName(); | |||
8900 | if (!Name) { | |||
8901 | if (!D.isInvalidType()) | |||
8902 | Diag(D.getDeclSpec().getLocStart(), | |||
8903 | diag::err_explicit_instantiation_requires_name) | |||
8904 | << D.getDeclSpec().getSourceRange() | |||
8905 | << D.getSourceRange(); | |||
8906 | ||||
8907 | return true; | |||
8908 | } | |||
8909 | ||||
8910 | // The scope passed in may not be a decl scope. Zip up the scope tree until | |||
8911 | // we find one that is. | |||
8912 | while ((S->getFlags() & Scope::DeclScope) == 0 || | |||
8913 | (S->getFlags() & Scope::TemplateParamScope) != 0) | |||
8914 | S = S->getParent(); | |||
8915 | ||||
8916 | // Determine the type of the declaration. | |||
8917 | TypeSourceInfo *T = GetTypeForDeclarator(D, S); | |||
8918 | QualType R = T->getType(); | |||
8919 | if (R.isNull()) | |||
8920 | return true; | |||
8921 | ||||
8922 | // C++ [dcl.stc]p1: | |||
8923 | // A storage-class-specifier shall not be specified in [...] an explicit | |||
8924 | // instantiation (14.7.2) directive. | |||
8925 | if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) { | |||
8926 | Diag(D.getIdentifierLoc(), diag::err_explicit_instantiation_of_typedef) | |||
8927 | << Name; | |||
8928 | return true; | |||
8929 | } else if (D.getDeclSpec().getStorageClassSpec() | |||
8930 | != DeclSpec::SCS_unspecified) { | |||
8931 | // Complain about then remove the storage class specifier. | |||
8932 | Diag(D.getIdentifierLoc(), diag::err_explicit_instantiation_storage_class) | |||
8933 | << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc()); | |||
8934 | ||||
8935 | D.getMutableDeclSpec().ClearStorageClassSpecs(); | |||
8936 | } | |||
8937 | ||||
8938 | // C++0x [temp.explicit]p1: | |||
8939 | // [...] An explicit instantiation of a function template shall not use the | |||
8940 | // inline or constexpr specifiers. | |||
8941 | // Presumably, this also applies to member functions of class templates as | |||
8942 | // well. | |||
8943 | if (D.getDeclSpec().isInlineSpecified()) | |||
8944 | Diag(D.getDeclSpec().getInlineSpecLoc(), | |||
8945 | getLangOpts().CPlusPlus11 ? | |||
8946 | diag::err_explicit_instantiation_inline : | |||
8947 | diag::warn_explicit_instantiation_inline_0x) | |||
8948 | << FixItHint::CreateRemoval(D.getDeclSpec().getInlineSpecLoc()); | |||
8949 | if (D.getDeclSpec().isConstexprSpecified() && R->isFunctionType()) | |||
8950 | // FIXME: Add a fix-it to remove the 'constexpr' and add a 'const' if one is | |||
8951 | // not already specified. | |||
8952 | Diag(D.getDeclSpec().getConstexprSpecLoc(), | |||
8953 | diag::err_explicit_instantiation_constexpr); | |||
8954 | ||||
8955 | // A deduction guide is not on the list of entities that can be explicitly | |||
8956 | // instantiated. | |||
8957 | if (Name.getNameKind() == DeclarationName::CXXDeductionGuideName) { | |||
8958 | Diag(D.getDeclSpec().getLocStart(), diag::err_deduction_guide_specialized) | |||
8959 | << /*explicit instantiation*/ 0; | |||
8960 | return true; | |||
8961 | } | |||
8962 | ||||
8963 | // C++0x [temp.explicit]p2: | |||
8964 | // There are two forms of explicit instantiation: an explicit instantiation | |||
8965 | // definition and an explicit instantiation declaration. An explicit | |||
8966 | // instantiation declaration begins with the extern keyword. [...] | |||
8967 | TemplateSpecializationKind TSK | |||
8968 | = ExternLoc.isInvalid()? TSK_ExplicitInstantiationDefinition | |||
8969 | : TSK_ExplicitInstantiationDeclaration; | |||
8970 | ||||
8971 | LookupResult Previous(*this, NameInfo, LookupOrdinaryName); | |||
8972 | LookupParsedName(Previous, S, &D.getCXXScopeSpec()); | |||
8973 | ||||
8974 | if (!R->isFunctionType()) { | |||
8975 | // C++ [temp.explicit]p1: | |||
8976 | // A [...] static data member of a class template can be explicitly | |||
8977 | // instantiated from the member definition associated with its class | |||
8978 | // template. | |||
8979 | // C++1y [temp.explicit]p1: | |||
8980 | // A [...] variable [...] template specialization can be explicitly | |||
8981 | // instantiated from its template. | |||
8982 | if (Previous.isAmbiguous()) | |||
8983 | return true; | |||
8984 | ||||
8985 | VarDecl *Prev = Previous.getAsSingle<VarDecl>(); | |||
8986 | VarTemplateDecl *PrevTemplate = Previous.getAsSingle<VarTemplateDecl>(); | |||
8987 | ||||
8988 | if (!PrevTemplate) { | |||
8989 | if (!Prev || !Prev->isStaticDataMember()) { | |||
8990 | // We expect to see a data data member here. | |||
8991 | Diag(D.getIdentifierLoc(), diag::err_explicit_instantiation_not_known) | |||
8992 | << Name; | |||
8993 | for (LookupResult::iterator P = Previous.begin(), PEnd = Previous.end(); | |||
8994 | P != PEnd; ++P) | |||
8995 | Diag((*P)->getLocation(), diag::note_explicit_instantiation_here); | |||
8996 | return true; | |||
8997 | } | |||
8998 | ||||
8999 | if (!Prev->getInstantiatedFromStaticDataMember()) { | |||
9000 | // FIXME: Check for explicit specialization? | |||
9001 | Diag(D.getIdentifierLoc(), | |||
9002 | diag::err_explicit_instantiation_data_member_not_instantiated) | |||
9003 | << Prev; | |||
9004 | Diag(Prev->getLocation(), diag::note_explicit_instantiation_here); | |||
9005 | // FIXME: Can we provide a note showing where this was declared? | |||
9006 | return true; | |||
9007 | } | |||
9008 | } else { | |||
9009 | // Explicitly instantiate a variable template. | |||
9010 | ||||
9011 | // C++1y [dcl.spec.auto]p6: | |||
9012 | // ... A program that uses auto or decltype(auto) in a context not | |||
9013 | // explicitly allowed in this section is ill-formed. | |||
9014 | // | |||
9015 | // This includes auto-typed variable template instantiations. | |||
9016 | if (R->isUndeducedType()) { | |||
9017 | Diag(T->getTypeLoc().getLocStart(), | |||
9018 | diag::err_auto_not_allowed_var_inst); | |||
9019 | return true; | |||
9020 | } | |||
9021 | ||||
9022 | if (D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) { | |||
9023 | // C++1y [temp.explicit]p3: | |||
9024 | // If the explicit instantiation is for a variable, the unqualified-id | |||
9025 | // in the declaration shall be a template-id. | |||
9026 | Diag(D.getIdentifierLoc(), | |||
9027 | diag::err_explicit_instantiation_without_template_id) | |||
9028 | << PrevTemplate; | |||
9029 | Diag(PrevTemplate->getLocation(), | |||
9030 | diag::note_explicit_instantiation_here); | |||
9031 | return true; | |||
9032 | } | |||
9033 | ||||
9034 | // Translate the parser's template argument list into our AST format. | |||
9035 | TemplateArgumentListInfo TemplateArgs = | |||
9036 | makeTemplateArgumentListInfo(*this, *D.getName().TemplateId); | |||
9037 | ||||
9038 | DeclResult Res = CheckVarTemplateId(PrevTemplate, TemplateLoc, | |||
9039 | D.getIdentifierLoc(), TemplateArgs); | |||
9040 | if (Res.isInvalid()) | |||
9041 | return true; | |||
9042 | ||||
9043 | // Ignore access control bits, we don't need them for redeclaration | |||
9044 | // checking. | |||
9045 | Prev = cast<VarDecl>(Res.get()); | |||
9046 | } | |||
9047 | ||||
9048 | // C++0x [temp.explicit]p2: | |||
9049 | // If the explicit instantiation is for a member function, a member class | |||
9050 | // or a static data member of a class template specialization, the name of | |||
9051 | // the class template specialization in the qualified-id for the member | |||
9052 | // name shall be a simple-template-id. | |||
9053 | // | |||
9054 | // C++98 has the same restriction, just worded differently. | |||
9055 | // | |||
9056 | // This does not apply to variable template specializations, where the | |||
9057 | // template-id is in the unqualified-id instead. | |||
9058 | if (!ScopeSpecifierHasTemplateId(D.getCXXScopeSpec()) && !PrevTemplate) | |||
9059 | Diag(D.getIdentifierLoc(), | |||
9060 | diag::ext_explicit_instantiation_without_qualified_id) | |||
9061 | << Prev << D.getCXXScopeSpec().getRange(); | |||
9062 | ||||
9063 | // Check the scope of this explicit instantiation. | |||
9064 | CheckExplicitInstantiationScope(*this, Prev, D.getIdentifierLoc(), true); | |||
9065 | ||||
9066 | // Verify that it is okay to explicitly instantiate here. | |||
9067 | TemplateSpecializationKind PrevTSK = Prev->getTemplateSpecializationKind(); | |||
9068 | SourceLocation POI = Prev->getPointOfInstantiation(); | |||
9069 | bool HasNoEffect = false; | |||
9070 | if (CheckSpecializationInstantiationRedecl(D.getIdentifierLoc(), TSK, Prev, | |||
9071 | PrevTSK, POI, HasNoEffect)) | |||
9072 | return true; | |||
9073 | ||||
9074 | if (!HasNoEffect) { | |||
9075 | // Instantiate static data member or variable template. | |||
9076 | Prev->setTemplateSpecializationKind(TSK, D.getIdentifierLoc()); | |||
9077 | if (PrevTemplate) { | |||
9078 | // Merge attributes. | |||
9079 | if (AttributeList *Attr = D.getDeclSpec().getAttributes().getList()) | |||
9080 | ProcessDeclAttributeList(S, Prev, Attr); | |||
9081 | } | |||
9082 | if (TSK == TSK_ExplicitInstantiationDefinition) | |||
9083 | InstantiateVariableDefinition(D.getIdentifierLoc(), Prev); | |||
9084 | } | |||
9085 | ||||
9086 | // Check the new variable specialization against the parsed input. | |||
9087 | if (PrevTemplate && Prev && !Context.hasSameType(Prev->getType(), R)) { | |||
9088 | Diag(T->getTypeLoc().getLocStart(), | |||
9089 | diag::err_invalid_var_template_spec_type) | |||
9090 | << 0 << PrevTemplate << R << Prev->getType(); | |||
9091 | Diag(PrevTemplate->getLocation(), diag::note_template_declared_here) | |||
9092 | << 2 << PrevTemplate->getDeclName(); | |||
9093 | return true; | |||
9094 | } | |||
9095 | ||||
9096 | // FIXME: Create an ExplicitInstantiation node? | |||
9097 | return (Decl*) nullptr; | |||
9098 | } | |||
9099 | ||||
9100 | // If the declarator is a template-id, translate the parser's template | |||
9101 | // argument list into our AST format. | |||
9102 | bool HasExplicitTemplateArgs = false; | |||
9103 | TemplateArgumentListInfo TemplateArgs; | |||
9104 | if (D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId) { | |||
9105 | TemplateArgs = makeTemplateArgumentListInfo(*this, *D.getName().TemplateId); | |||
9106 | HasExplicitTemplateArgs = true; | |||
9107 | } | |||
9108 | ||||
9109 | // C++ [temp.explicit]p1: | |||
9110 | // A [...] function [...] can be explicitly instantiated from its template. | |||
9111 | // A member function [...] of a class template can be explicitly | |||
9112 | // instantiated from the member definition associated with its class | |||
9113 | // template. | |||
9114 | UnresolvedSet<8> TemplateMatches; | |||
9115 | FunctionDecl *NonTemplateMatch = nullptr; | |||
9116 | AttributeList *Attr = D.getDeclSpec().getAttributes().getList(); | |||
9117 | TemplateSpecCandidateSet FailedCandidates(D.getIdentifierLoc()); | |||
9118 | for (LookupResult::iterator P = Previous.begin(), PEnd = Previous.end(); | |||
9119 | P != PEnd; ++P) { | |||
9120 | NamedDecl *Prev = *P; | |||
9121 | if (!HasExplicitTemplateArgs) { | |||
9122 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(Prev)) { | |||
9123 | QualType Adjusted = adjustCCAndNoReturn(R, Method->getType(), | |||
9124 | /*AdjustExceptionSpec*/true); | |||
9125 | if (Context.hasSameUnqualifiedType(Method->getType(), Adjusted)) { | |||
9126 | if (Method->getPrimaryTemplate()) { | |||
9127 | TemplateMatches.addDecl(Method, P.getAccess()); | |||
9128 | } else { | |||
9129 | // FIXME: Can this assert ever happen? Needs a test. | |||
9130 | assert(!NonTemplateMatch && "Multiple NonTemplateMatches")(static_cast <bool> (!NonTemplateMatch && "Multiple NonTemplateMatches" ) ? void (0) : __assert_fail ("!NonTemplateMatch && \"Multiple NonTemplateMatches\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 9130, __extension__ __PRETTY_FUNCTION__)); | |||
9131 | NonTemplateMatch = Method; | |||
9132 | } | |||
9133 | } | |||
9134 | } | |||
9135 | } | |||
9136 | ||||
9137 | FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(Prev); | |||
9138 | if (!FunTmpl) | |||
9139 | continue; | |||
9140 | ||||
9141 | TemplateDeductionInfo Info(FailedCandidates.getLocation()); | |||
9142 | FunctionDecl *Specialization = nullptr; | |||
9143 | if (TemplateDeductionResult TDK | |||
9144 | = DeduceTemplateArguments(FunTmpl, | |||
9145 | (HasExplicitTemplateArgs ? &TemplateArgs | |||
9146 | : nullptr), | |||
9147 | R, Specialization, Info)) { | |||
9148 | // Keep track of almost-matches. | |||
9149 | FailedCandidates.addCandidate() | |||
9150 | .set(P.getPair(), FunTmpl->getTemplatedDecl(), | |||
9151 | MakeDeductionFailureInfo(Context, TDK, Info)); | |||
9152 | (void)TDK; | |||
9153 | continue; | |||
9154 | } | |||
9155 | ||||
9156 | // Target attributes are part of the cuda function signature, so | |||
9157 | // the cuda target of the instantiated function must match that of its | |||
9158 | // template. Given that C++ template deduction does not take | |||
9159 | // target attributes into account, we reject candidates here that | |||
9160 | // have a different target. | |||
9161 | if (LangOpts.CUDA && | |||
9162 | IdentifyCUDATarget(Specialization, | |||
9163 | /* IgnoreImplicitHDAttributes = */ true) != | |||
9164 | IdentifyCUDATarget(Attr)) { | |||
9165 | FailedCandidates.addCandidate().set( | |||
9166 | P.getPair(), FunTmpl->getTemplatedDecl(), | |||
9167 | MakeDeductionFailureInfo(Context, TDK_CUDATargetMismatch, Info)); | |||
9168 | continue; | |||
9169 | } | |||
9170 | ||||
9171 | TemplateMatches.addDecl(Specialization, P.getAccess()); | |||
9172 | } | |||
9173 | ||||
9174 | FunctionDecl *Specialization = NonTemplateMatch; | |||
9175 | if (!Specialization) { | |||
9176 | // Find the most specialized function template specialization. | |||
9177 | UnresolvedSetIterator Result = getMostSpecialized( | |||
9178 | TemplateMatches.begin(), TemplateMatches.end(), FailedCandidates, | |||
9179 | D.getIdentifierLoc(), | |||
9180 | PDiag(diag::err_explicit_instantiation_not_known) << Name, | |||
9181 | PDiag(diag::err_explicit_instantiation_ambiguous) << Name, | |||
9182 | PDiag(diag::note_explicit_instantiation_candidate)); | |||
9183 | ||||
9184 | if (Result == TemplateMatches.end()) | |||
9185 | return true; | |||
9186 | ||||
9187 | // Ignore access control bits, we don't need them for redeclaration checking. | |||
9188 | Specialization = cast<FunctionDecl>(*Result); | |||
9189 | } | |||
9190 | ||||
9191 | // C++11 [except.spec]p4 | |||
9192 | // In an explicit instantiation an exception-specification may be specified, | |||
9193 | // but is not required. | |||
9194 | // If an exception-specification is specified in an explicit instantiation | |||
9195 | // directive, it shall be compatible with the exception-specifications of | |||
9196 | // other declarations of that function. | |||
9197 | if (auto *FPT = R->getAs<FunctionProtoType>()) | |||
9198 | if (FPT->hasExceptionSpec()) { | |||
9199 | unsigned DiagID = | |||
9200 | diag::err_mismatched_exception_spec_explicit_instantiation; | |||
9201 | if (getLangOpts().MicrosoftExt) | |||
9202 | DiagID = diag::ext_mismatched_exception_spec_explicit_instantiation; | |||
9203 | bool Result = CheckEquivalentExceptionSpec( | |||
9204 | PDiag(DiagID) << Specialization->getType(), | |||
9205 | PDiag(diag::note_explicit_instantiation_here), | |||
9206 | Specialization->getType()->getAs<FunctionProtoType>(), | |||
9207 | Specialization->getLocation(), FPT, D.getLocStart()); | |||
9208 | // In Microsoft mode, mismatching exception specifications just cause a | |||
9209 | // warning. | |||
9210 | if (!getLangOpts().MicrosoftExt && Result) | |||
9211 | return true; | |||
9212 | } | |||
9213 | ||||
9214 | if (Specialization->getTemplateSpecializationKind() == TSK_Undeclared) { | |||
9215 | Diag(D.getIdentifierLoc(), | |||
9216 | diag::err_explicit_instantiation_member_function_not_instantiated) | |||
9217 | << Specialization | |||
9218 | << (Specialization->getTemplateSpecializationKind() == | |||
9219 | TSK_ExplicitSpecialization); | |||
9220 | Diag(Specialization->getLocation(), diag::note_explicit_instantiation_here); | |||
9221 | return true; | |||
9222 | } | |||
9223 | ||||
9224 | FunctionDecl *PrevDecl = Specialization->getPreviousDecl(); | |||
9225 | if (!PrevDecl && Specialization->isThisDeclarationADefinition()) | |||
9226 | PrevDecl = Specialization; | |||
9227 | ||||
9228 | if (PrevDecl) { | |||
9229 | bool HasNoEffect = false; | |||
9230 | if (CheckSpecializationInstantiationRedecl(D.getIdentifierLoc(), TSK, | |||
9231 | PrevDecl, | |||
9232 | PrevDecl->getTemplateSpecializationKind(), | |||
9233 | PrevDecl->getPointOfInstantiation(), | |||
9234 | HasNoEffect)) | |||
9235 | return true; | |||
9236 | ||||
9237 | // FIXME: We may still want to build some representation of this | |||
9238 | // explicit specialization. | |||
9239 | if (HasNoEffect) | |||
9240 | return (Decl*) nullptr; | |||
9241 | } | |||
9242 | ||||
9243 | if (Attr) | |||
9244 | ProcessDeclAttributeList(S, Specialization, Attr); | |||
9245 | ||||
9246 | // In MSVC mode, dllimported explicit instantiation definitions are treated as | |||
9247 | // instantiation declarations. | |||
9248 | if (TSK == TSK_ExplicitInstantiationDefinition && | |||
9249 | Specialization->hasAttr<DLLImportAttr>() && | |||
9250 | Context.getTargetInfo().getCXXABI().isMicrosoft()) | |||
9251 | TSK = TSK_ExplicitInstantiationDeclaration; | |||
9252 | ||||
9253 | Specialization->setTemplateSpecializationKind(TSK, D.getIdentifierLoc()); | |||
9254 | ||||
9255 | if (Specialization->isDefined()) { | |||
9256 | // Let the ASTConsumer know that this function has been explicitly | |||
9257 | // instantiated now, and its linkage might have changed. | |||
9258 | Consumer.HandleTopLevelDecl(DeclGroupRef(Specialization)); | |||
9259 | } else if (TSK == TSK_ExplicitInstantiationDefinition) | |||
9260 | InstantiateFunctionDefinition(D.getIdentifierLoc(), Specialization); | |||
9261 | ||||
9262 | // C++0x [temp.explicit]p2: | |||
9263 | // If the explicit instantiation is for a member function, a member class | |||
9264 | // or a static data member of a class template specialization, the name of | |||
9265 | // the class template specialization in the qualified-id for the member | |||
9266 | // name shall be a simple-template-id. | |||
9267 | // | |||
9268 | // C++98 has the same restriction, just worded differently. | |||
9269 | FunctionTemplateDecl *FunTmpl = Specialization->getPrimaryTemplate(); | |||
9270 | if (D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId && !FunTmpl && | |||
9271 | D.getCXXScopeSpec().isSet() && | |||
9272 | !ScopeSpecifierHasTemplateId(D.getCXXScopeSpec())) | |||
9273 | Diag(D.getIdentifierLoc(), | |||
9274 | diag::ext_explicit_instantiation_without_qualified_id) | |||
9275 | << Specialization << D.getCXXScopeSpec().getRange(); | |||
9276 | ||||
9277 | CheckExplicitInstantiationScope(*this, | |||
9278 | FunTmpl? (NamedDecl *)FunTmpl | |||
9279 | : Specialization->getInstantiatedFromMemberFunction(), | |||
9280 | D.getIdentifierLoc(), | |||
9281 | D.getCXXScopeSpec().isSet()); | |||
9282 | ||||
9283 | // FIXME: Create some kind of ExplicitInstantiationDecl here. | |||
9284 | return (Decl*) nullptr; | |||
9285 | } | |||
9286 | ||||
9287 | TypeResult | |||
9288 | Sema::ActOnDependentTag(Scope *S, unsigned TagSpec, TagUseKind TUK, | |||
9289 | const CXXScopeSpec &SS, IdentifierInfo *Name, | |||
9290 | SourceLocation TagLoc, SourceLocation NameLoc) { | |||
9291 | // This has to hold, because SS is expected to be defined. | |||
9292 | assert(Name && "Expected a name in a dependent tag")(static_cast <bool> (Name && "Expected a name in a dependent tag" ) ? void (0) : __assert_fail ("Name && \"Expected a name in a dependent tag\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 9292, __extension__ __PRETTY_FUNCTION__)); | |||
9293 | ||||
9294 | NestedNameSpecifier *NNS = SS.getScopeRep(); | |||
9295 | if (!NNS) | |||
9296 | return true; | |||
9297 | ||||
9298 | TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec); | |||
9299 | ||||
9300 | if (TUK == TUK_Declaration || TUK == TUK_Definition) { | |||
9301 | Diag(NameLoc, diag::err_dependent_tag_decl) | |||
9302 | << (TUK == TUK_Definition) << Kind << SS.getRange(); | |||
9303 | return true; | |||
9304 | } | |||
9305 | ||||
9306 | // Create the resulting type. | |||
9307 | ElaboratedTypeKeyword Kwd = TypeWithKeyword::getKeywordForTagTypeKind(Kind); | |||
9308 | QualType Result = Context.getDependentNameType(Kwd, NNS, Name); | |||
9309 | ||||
9310 | // Create type-source location information for this type. | |||
9311 | TypeLocBuilder TLB; | |||
9312 | DependentNameTypeLoc TL = TLB.push<DependentNameTypeLoc>(Result); | |||
9313 | TL.setElaboratedKeywordLoc(TagLoc); | |||
9314 | TL.setQualifierLoc(SS.getWithLocInContext(Context)); | |||
9315 | TL.setNameLoc(NameLoc); | |||
9316 | return CreateParsedType(Result, TLB.getTypeSourceInfo(Context, Result)); | |||
9317 | } | |||
9318 | ||||
9319 | TypeResult | |||
9320 | Sema::ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, | |||
9321 | const CXXScopeSpec &SS, const IdentifierInfo &II, | |||
9322 | SourceLocation IdLoc) { | |||
9323 | if (SS.isInvalid()) | |||
9324 | return true; | |||
9325 | ||||
9326 | if (TypenameLoc.isValid() && S && !S->getTemplateParamParent()) | |||
9327 | Diag(TypenameLoc, | |||
9328 | getLangOpts().CPlusPlus11 ? | |||
9329 | diag::warn_cxx98_compat_typename_outside_of_template : | |||
9330 | diag::ext_typename_outside_of_template) | |||
9331 | << FixItHint::CreateRemoval(TypenameLoc); | |||
9332 | ||||
9333 | NestedNameSpecifierLoc QualifierLoc = SS.getWithLocInContext(Context); | |||
9334 | QualType T = CheckTypenameType(TypenameLoc.isValid()? ETK_Typename : ETK_None, | |||
9335 | TypenameLoc, QualifierLoc, II, IdLoc); | |||
9336 | if (T.isNull()) | |||
9337 | return true; | |||
9338 | ||||
9339 | TypeSourceInfo *TSI = Context.CreateTypeSourceInfo(T); | |||
9340 | if (isa<DependentNameType>(T)) { | |||
9341 | DependentNameTypeLoc TL = TSI->getTypeLoc().castAs<DependentNameTypeLoc>(); | |||
9342 | TL.setElaboratedKeywordLoc(TypenameLoc); | |||
9343 | TL.setQualifierLoc(QualifierLoc); | |||
9344 | TL.setNameLoc(IdLoc); | |||
9345 | } else { | |||
9346 | ElaboratedTypeLoc TL = TSI->getTypeLoc().castAs<ElaboratedTypeLoc>(); | |||
9347 | TL.setElaboratedKeywordLoc(TypenameLoc); | |||
9348 | TL.setQualifierLoc(QualifierLoc); | |||
9349 | TL.getNamedTypeLoc().castAs<TypeSpecTypeLoc>().setNameLoc(IdLoc); | |||
9350 | } | |||
9351 | ||||
9352 | return CreateParsedType(T, TSI); | |||
9353 | } | |||
9354 | ||||
9355 | TypeResult | |||
9356 | Sema::ActOnTypenameType(Scope *S, | |||
9357 | SourceLocation TypenameLoc, | |||
9358 | const CXXScopeSpec &SS, | |||
9359 | SourceLocation TemplateKWLoc, | |||
9360 | TemplateTy TemplateIn, | |||
9361 | IdentifierInfo *TemplateII, | |||
9362 | SourceLocation TemplateIILoc, | |||
9363 | SourceLocation LAngleLoc, | |||
9364 | ASTTemplateArgsPtr TemplateArgsIn, | |||
9365 | SourceLocation RAngleLoc) { | |||
9366 | if (TypenameLoc.isValid() && S && !S->getTemplateParamParent()) | |||
9367 | Diag(TypenameLoc, | |||
9368 | getLangOpts().CPlusPlus11 ? | |||
9369 | diag::warn_cxx98_compat_typename_outside_of_template : | |||
9370 | diag::ext_typename_outside_of_template) | |||
9371 | << FixItHint::CreateRemoval(TypenameLoc); | |||
9372 | ||||
9373 | // Strangely, non-type results are not ignored by this lookup, so the | |||
9374 | // program is ill-formed if it finds an injected-class-name. | |||
9375 | if (TypenameLoc.isValid()) { | |||
9376 | auto *LookupRD = | |||
9377 | dyn_cast_or_null<CXXRecordDecl>(computeDeclContext(SS, false)); | |||
9378 | if (LookupRD && LookupRD->getIdentifier() == TemplateII) { | |||
9379 | Diag(TemplateIILoc, | |||
9380 | diag::ext_out_of_line_qualified_id_type_names_constructor) | |||
9381 | << TemplateII << 0 /*injected-class-name used as template name*/ | |||
9382 | << (TemplateKWLoc.isValid() ? 1 : 0 /*'template'/'typename' keyword*/); | |||
9383 | } | |||
9384 | } | |||
9385 | ||||
9386 | // Translate the parser's template argument list in our AST format. | |||
9387 | TemplateArgumentListInfo TemplateArgs(LAngleLoc, RAngleLoc); | |||
9388 | translateTemplateArguments(TemplateArgsIn, TemplateArgs); | |||
9389 | ||||
9390 | TemplateName Template = TemplateIn.get(); | |||
9391 | if (DependentTemplateName *DTN = Template.getAsDependentTemplateName()) { | |||
9392 | // Construct a dependent template specialization type. | |||
9393 | assert(DTN && "dependent template has non-dependent name?")(static_cast <bool> (DTN && "dependent template has non-dependent name?" ) ? void (0) : __assert_fail ("DTN && \"dependent template has non-dependent name?\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 9393, __extension__ __PRETTY_FUNCTION__)); | |||
9394 | assert(DTN->getQualifier() == SS.getScopeRep())(static_cast <bool> (DTN->getQualifier() == SS.getScopeRep ()) ? void (0) : __assert_fail ("DTN->getQualifier() == SS.getScopeRep()" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 9394, __extension__ __PRETTY_FUNCTION__)); | |||
9395 | QualType T = Context.getDependentTemplateSpecializationType(ETK_Typename, | |||
9396 | DTN->getQualifier(), | |||
9397 | DTN->getIdentifier(), | |||
9398 | TemplateArgs); | |||
9399 | ||||
9400 | // Create source-location information for this type. | |||
9401 | TypeLocBuilder Builder; | |||
9402 | DependentTemplateSpecializationTypeLoc SpecTL | |||
9403 | = Builder.push<DependentTemplateSpecializationTypeLoc>(T); | |||
9404 | SpecTL.setElaboratedKeywordLoc(TypenameLoc); | |||
9405 | SpecTL.setQualifierLoc(SS.getWithLocInContext(Context)); | |||
9406 | SpecTL.setTemplateKeywordLoc(TemplateKWLoc); | |||
9407 | SpecTL.setTemplateNameLoc(TemplateIILoc); | |||
9408 | SpecTL.setLAngleLoc(LAngleLoc); | |||
9409 | SpecTL.setRAngleLoc(RAngleLoc); | |||
9410 | for (unsigned I = 0, N = TemplateArgs.size(); I != N; ++I) | |||
9411 | SpecTL.setArgLocInfo(I, TemplateArgs[I].getLocInfo()); | |||
9412 | return CreateParsedType(T, Builder.getTypeSourceInfo(Context, T)); | |||
9413 | } | |||
9414 | ||||
9415 | QualType T = CheckTemplateIdType(Template, TemplateIILoc, TemplateArgs); | |||
9416 | if (T.isNull()) | |||
9417 | return true; | |||
9418 | ||||
9419 | // Provide source-location information for the template specialization type. | |||
9420 | TypeLocBuilder Builder; | |||
9421 | TemplateSpecializationTypeLoc SpecTL | |||
9422 | = Builder.push<TemplateSpecializationTypeLoc>(T); | |||
9423 | SpecTL.setTemplateKeywordLoc(TemplateKWLoc); | |||
9424 | SpecTL.setTemplateNameLoc(TemplateIILoc); | |||
9425 | SpecTL.setLAngleLoc(LAngleLoc); | |||
9426 | SpecTL.setRAngleLoc(RAngleLoc); | |||
9427 | for (unsigned I = 0, N = TemplateArgs.size(); I != N; ++I) | |||
9428 | SpecTL.setArgLocInfo(I, TemplateArgs[I].getLocInfo()); | |||
9429 | ||||
9430 | T = Context.getElaboratedType(ETK_Typename, SS.getScopeRep(), T); | |||
9431 | ElaboratedTypeLoc TL = Builder.push<ElaboratedTypeLoc>(T); | |||
9432 | TL.setElaboratedKeywordLoc(TypenameLoc); | |||
9433 | TL.setQualifierLoc(SS.getWithLocInContext(Context)); | |||
9434 | ||||
9435 | TypeSourceInfo *TSI = Builder.getTypeSourceInfo(Context, T); | |||
9436 | return CreateParsedType(T, TSI); | |||
9437 | } | |||
9438 | ||||
9439 | ||||
9440 | /// Determine whether this failed name lookup should be treated as being | |||
9441 | /// disabled by a usage of std::enable_if. | |||
9442 | static bool isEnableIf(NestedNameSpecifierLoc NNS, const IdentifierInfo &II, | |||
9443 | SourceRange &CondRange, Expr *&Cond) { | |||
9444 | // We must be looking for a ::type... | |||
9445 | if (!II.isStr("type")) | |||
9446 | return false; | |||
9447 | ||||
9448 | // ... within an explicitly-written template specialization... | |||
9449 | if (!NNS || !NNS.getNestedNameSpecifier()->getAsType()) | |||
9450 | return false; | |||
9451 | TypeLoc EnableIfTy = NNS.getTypeLoc(); | |||
9452 | TemplateSpecializationTypeLoc EnableIfTSTLoc = | |||
9453 | EnableIfTy.getAs<TemplateSpecializationTypeLoc>(); | |||
9454 | if (!EnableIfTSTLoc || EnableIfTSTLoc.getNumArgs() == 0) | |||
9455 | return false; | |||
9456 | const TemplateSpecializationType *EnableIfTST = EnableIfTSTLoc.getTypePtr(); | |||
9457 | ||||
9458 | // ... which names a complete class template declaration... | |||
9459 | const TemplateDecl *EnableIfDecl = | |||
9460 | EnableIfTST->getTemplateName().getAsTemplateDecl(); | |||
9461 | if (!EnableIfDecl || EnableIfTST->isIncompleteType()) | |||
9462 | return false; | |||
9463 | ||||
9464 | // ... called "enable_if". | |||
9465 | const IdentifierInfo *EnableIfII = | |||
9466 | EnableIfDecl->getDeclName().getAsIdentifierInfo(); | |||
9467 | if (!EnableIfII || !EnableIfII->isStr("enable_if")) | |||
9468 | return false; | |||
9469 | ||||
9470 | // Assume the first template argument is the condition. | |||
9471 | CondRange = EnableIfTSTLoc.getArgLoc(0).getSourceRange(); | |||
9472 | ||||
9473 | // Dig out the condition. | |||
9474 | Cond = nullptr; | |||
9475 | if (EnableIfTSTLoc.getArgLoc(0).getArgument().getKind() | |||
9476 | != TemplateArgument::Expression) | |||
9477 | return true; | |||
9478 | ||||
9479 | Cond = EnableIfTSTLoc.getArgLoc(0).getSourceExpression(); | |||
9480 | ||||
9481 | // Ignore Boolean literals; they add no value. | |||
9482 | if (isa<CXXBoolLiteralExpr>(Cond->IgnoreParenCasts())) | |||
9483 | Cond = nullptr; | |||
9484 | ||||
9485 | return true; | |||
9486 | } | |||
9487 | ||||
9488 | /// \brief Build the type that describes a C++ typename specifier, | |||
9489 | /// e.g., "typename T::type". | |||
9490 | QualType | |||
9491 | Sema::CheckTypenameType(ElaboratedTypeKeyword Keyword, | |||
9492 | SourceLocation KeywordLoc, | |||
9493 | NestedNameSpecifierLoc QualifierLoc, | |||
9494 | const IdentifierInfo &II, | |||
9495 | SourceLocation IILoc) { | |||
9496 | CXXScopeSpec SS; | |||
9497 | SS.Adopt(QualifierLoc); | |||
9498 | ||||
9499 | DeclContext *Ctx = computeDeclContext(SS); | |||
9500 | if (!Ctx) { | |||
9501 | // If the nested-name-specifier is dependent and couldn't be | |||
9502 | // resolved to a type, build a typename type. | |||
9503 | assert(QualifierLoc.getNestedNameSpecifier()->isDependent())(static_cast <bool> (QualifierLoc.getNestedNameSpecifier ()->isDependent()) ? void (0) : __assert_fail ("QualifierLoc.getNestedNameSpecifier()->isDependent()" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/lib/Sema/SemaTemplate.cpp" , 9503, __extension__ __PRETTY_FUNCTION__)); | |||
9504 | return Context.getDependentNameType(Keyword, | |||
9505 | QualifierLoc.getNestedNameSpecifier(), | |||
9506 | &II); | |||
9507 | } | |||
9508 | ||||
9509 | // If the nested-name-specifier refers to the current instantiation, | |||
9510 | // the "typename" keyword itself is superfluous. In C++03, the | |||
9511 | // program is actually ill-formed. However, DR 382 (in C++0x CD1) | |||
9512 | // allows such extraneous "typename" keywords, and we retroactively | |||
9513 | // apply this DR to C++03 code with only a warning. In any case we continue. | |||
9514 | ||||
9515 | if (RequireCompleteDeclContext(SS, Ctx)) | |||
9516 | return QualType(); | |||
9517 | ||||
9518 | DeclarationName Name(&II); | |||
9519 | LookupResult Result(*this, Name, IILoc, LookupOrdinaryName); | |||
9520 | LookupQualifiedName(Result, Ctx, SS); | |||
9521 | unsigned DiagID = 0; | |||
9522 | Decl *Referenced = nullptr; | |||
9523 | switch (Result.getResultKind()) { | |||
9524 | case LookupResult::NotFound: { | |||
9525 | // If we're looking up 'type' within a template named 'enable_if', produce | |||
9526 | // a more specific diagnostic. | |||
9527 | SourceRange CondRange; | |||
9528 | Expr *Cond = nullptr; | |||
9529 | if (isEnableIf(QualifierLoc, II, CondRange, Cond)) { | |||
9530 | // If we have a condition, narrow it down to the specific failed | |||
9531 | // condition. | |||
9532 | if (Cond) { | |||
9533 | Expr *FailedCond; | |||
9534 | std::string FailedDescription; | |||
9535 | std::tie(FailedCond, FailedDescription) = | |||
9536 | findFailedBooleanCondition(Cond, /*AllowTopLevelCond=*/true); | |||
9537 | ||||
9538 | Diag(FailedCond->getExprLoc(), | |||
9539 | diag::err_typename_nested_not_found_requirement) | |||
9540 | << FailedDescription | |||
9541 | << FailedCond->getSourceRange(); | |||
9542 | return QualType(); | |||
9543 | } | |||
9544 | ||||
9545 | Diag(CondRange.getBegin(), diag::err_typename_nested_not_found_enable_if) | |||
9546 | << Ctx << CondRange; | |||
9547 | return QualType(); | |||
9548 | } | |||
9549 | ||||
9550 | DiagID = diag::err_typename_nested_not_found; | |||
9551 | break; | |||
9552 | } | |||
9553 | ||||
9554 | case LookupResult::FoundUnresolvedValue: { | |||
9555 | // We found a using declaration that is a value. Most likely, the using | |||
9556 | // declaration itself is meant to have the 'typename' keyword. | |||
9557 | SourceRange FullRange(KeywordLoc.isValid() ? KeywordLoc : SS.getBeginLoc(), | |||
9558 | IILoc); | |||
9559 | Diag(IILoc, diag::err_typename_refers_to_using_value_decl) | |||
9560 | << Name << Ctx << FullRange; | |||
9561 | if (UnresolvedUsingValueDecl *Using | |||
9562 | = dyn_cast<UnresolvedUsingValueDecl>(Result.getRepresentativeDecl())){ | |||
9563 | SourceLocation Loc = Using->getQualifierLoc().getBeginLoc(); | |||
9564 | Diag(Loc, diag::note_using_value_decl_missing_typename) | |||
9565 | << FixItHint::CreateInsertion(Loc, "typename "); | |||
9566 | } | |||
9567 | } | |||
9568 | // Fall through to create a dependent typename type, from which we can recover | |||
9569 | // better. | |||
9570 | LLVM_FALLTHROUGH[[clang::fallthrough]]; | |||
9571 | ||||
9572 | case LookupResult::NotFoundInCurrentInstantiation: | |||
9573 | // Okay, it's a member of an unknown instantiation. | |||
9574 | return Context.getDependentNameType(Keyword, | |||
9575 | QualifierLoc.getNestedNameSpecifier(), | |||
9576 | &II); | |||
9577 | ||||
9578 | case LookupResult::Found: | |||
9579 | if (TypeDecl *Type = dyn_cast<TypeDecl>(Result.getFoundDecl())) { | |||
9580 | // C++ [class.qual]p2: | |||
9581 | // In a lookup in which function names are not ignored and the | |||
9582 | // nested-name-specifier nominates a class C, if the name specified | |||
9583 | // after the nested-name-specifier, when looked up in C, is the | |||
9584 | // injected-class-name of C [...] then the name is instead considered | |||
9585 | // to name the constructor of class C. | |||
9586 | // | |||
9587 | // Unlike in an elaborated-type-specifier, function names are not ignored | |||
9588 | // in typename-specifier lookup. However, they are ignored in all the | |||
9589 | // contexts where we form a typename type with no keyword (that is, in | |||
9590 | // mem-initializer-ids, base-specifiers, and elaborated-type-specifiers). | |||
9591 | // | |||
9592 | // FIXME: That's not strictly true: mem-initializer-id lookup does not | |||
9593 | // ignore functions, but that appears to be an oversight. | |||
9594 | auto *LookupRD = dyn_cast_or_null<CXXRecordDecl>(Ctx); | |||
9595 | auto *FoundRD = dyn_cast<CXXRecordDecl>(Type); | |||
9596 | if (Keyword == ETK_Typename && LookupRD && FoundRD && | |||
9597 | FoundRD->isInjectedClassName() && | |||
9598 | declaresSameEntity(LookupRD, cast<Decl>(FoundRD->getParent()))) | |||
9599 | Diag(IILoc, diag::ext_out_of_line_qualified_id_type_names_constructor) | |||
9600 | << &II << 1 << 0 /*'typename' keyword used*/; | |||
9601 | ||||
9602 | // We found a type. Build an ElaboratedType, since the | |||
9603 | // typename-specifier was just sugar. | |||
9604 | MarkAnyDeclReferenced(Type->getLocation(), Type, /*OdrUse=*/false); | |||
9605 | return Context.getElaboratedType(Keyword, | |||
9606 | QualifierLoc.getNestedNameSpecifier(), | |||
9607 | Context.getTypeDeclType(Type)); | |||
9608 | } | |||
9609 | ||||
9610 | // C++ [dcl.type.simple]p2: | |||
9611 | // A type-specifier of the form | |||
9612 | // typename[opt] nested-name-specifier[opt] template-name | |||
9613 | // is a placeholder for a deduced class type [...]. | |||
9614 | if (getLangOpts().CPlusPlus17) { | |||
9615 | if (auto *TD = getAsTypeTemplateDecl(Result.getFoundDecl())) { | |||
9616 | return Context.getElaboratedType( | |||
9617 | Keyword, QualifierLoc.getNestedNameSpecifier(), | |||
9618 | Context.getDeducedTemplateSpecializationType(TemplateName(TD), | |||
9619 | QualType(), false)); | |||
9620 | } | |||
9621 | } | |||
9622 | ||||
9623 | DiagID = diag::err_typename_nested_not_type; | |||
9624 | Referenced = Result.getFoundDecl(); | |||
9625 | break; | |||
9626 | ||||
9627 | case LookupResult::FoundOverloaded: | |||
9628 | DiagID = diag::err_typename_nested_not_type; | |||
9629 | Referenced = *Result.begin(); | |||
9630 | break; | |||
9631 | ||||
9632 | case LookupResult::Ambiguous: | |||
9633 | return QualType(); | |||
9634 | } | |||
9635 | ||||
9636 | // If we get here, it's because name lookup did not find a | |||
9637 | // type. Emit an appropriate diagnostic and return an error. | |||
9638 | SourceRange FullRange(KeywordLoc.isValid() ? KeywordLoc : SS.getBeginLoc(), | |||
9639 | IILoc); | |||
9640 | Diag(IILoc, DiagID) << FullRange << Name << Ctx; | |||
9641 | if (Referenced) | |||
9642 | Diag(Referenced->getLocation(), diag::note_typename_refers_here) | |||
9643 | << Name; | |||
9644 | return QualType(); | |||
9645 | } | |||
9646 | ||||
9647 | namespace { | |||
9648 | // See Sema::RebuildTypeInCurrentInstantiation | |||
9649 | class CurrentInstantiationRebuilder | |||
9650 | : public TreeTransform<CurrentInstantiationRebuilder> { | |||
9651 | SourceLocation Loc; | |||
9652 | DeclarationName Entity; | |||
9653 | ||||
9654 | public: | |||
9655 | typedef TreeTransform<CurrentInstantiationRebuilder> inherited; | |||
9656 | ||||
9657 | CurrentInstantiationRebuilder(Sema &SemaRef, | |||
9658 | SourceLocation Loc, | |||
9659 | DeclarationName Entity) | |||
9660 | : TreeTransform<CurrentInstantiationRebuilder>(SemaRef), | |||
9661 | Loc(Loc), Entity(Entity) { } | |||
9662 | ||||
9663 | /// \brief Determine whether the given type \p T has already been | |||
9664 | /// transformed. | |||
9665 | /// | |||
9666 | /// For the purposes of type reconstruction, a type has already been | |||
9667 | /// transformed if it is NULL or if it is not dependent. | |||
9668 | bool AlreadyTransformed(QualType T) { | |||
9669 | return T.isNull() || !T->isDependentType(); | |||
9670 | } | |||
9671 | ||||
9672 | /// \brief Returns the location of the entity whose type is being | |||
9673 | /// rebuilt. | |||
9674 | SourceLocation getBaseLocation() { return Loc; } | |||
9675 | ||||
9676 | /// \brief Returns the name of the entity whose type is being rebuilt. | |||
9677 | DeclarationName getBaseEntity() { return Entity; } | |||
9678 | ||||
9679 | /// \brief Sets the "base" location and entity when that | |||
9680 | /// information is known based on another transformation. | |||
9681 | void setBase(SourceLocation Loc, DeclarationName Entity) { | |||
9682 | this->Loc = Loc; | |||
9683 | this->Entity = Entity; | |||
9684 | } | |||
9685 | ||||
9686 | ExprResult TransformLambdaExpr(LambdaExpr *E) { | |||
9687 | // Lambdas never need to be transformed. | |||
9688 | return E; | |||
9689 | } | |||
9690 | }; | |||
9691 | } // end anonymous namespace | |||
9692 | ||||
9693 | /// \brief Rebuilds a type within the context of the current instantiation. | |||
9694 | /// | |||
9695 | /// The type \p T is part of the type of an out-of-line member definition of | |||
9696 | /// a class template (or class template partial specialization) that was parsed | |||
9697 | /// and constructed before we entered the scope of the class template (or | |||
9698 | /// partial specialization thereof). This routine will rebuild that type now | |||
9699 | /// that we have entered the declarator's scope, which may produce different | |||
9700 | /// canonical types, e.g., | |||
9701 | /// | |||
9702 | /// \code | |||
9703 | /// template<typename T> | |||
9704 | /// struct X { | |||
9705 | /// typedef T* pointer; | |||
9706 | /// pointer data(); | |||
9707 | /// }; | |||
9708 | /// | |||
9709 | /// template<typename T> | |||
9710 | /// typename X<T>::pointer X<T>::data() { ... } | |||
9711 | /// \endcode | |||
9712 | /// | |||
9713 | /// Here, the type "typename X<T>::pointer" will be created as a DependentNameType, | |||
9714 | /// since we do not know that we can look into X<T> when we parsed the type. | |||
9715 | /// This function will rebuild the type, performing the lookup of "pointer" | |||
9716 | /// in X<T> and returning an ElaboratedType whose canonical type is the same | |||
9717 | /// as the canonical type of T*, allowing the return types of the out-of-line | |||
9718 | /// definition and the declaration to match. | |||
9719 | TypeSourceInfo *Sema::RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, | |||
9720 | SourceLocation Loc, | |||
9721 | DeclarationName Name) { | |||
9722 | if (!T || !T->getType()->isDependentType()) | |||
9723 | return T; | |||
9724 | ||||
9725 | CurrentInstantiationRebuilder Rebuilder(*this, Loc, Name); | |||
9726 | return Rebuilder.TransformType(T); | |||
9727 | } | |||
9728 | ||||
9729 | ExprResult Sema::RebuildExprInCurrentInstantiation(Expr *E) { | |||
9730 | CurrentInstantiationRebuilder Rebuilder(*this, E->getExprLoc(), | |||
9731 | DeclarationName()); | |||
9732 | return Rebuilder.TransformExpr(E); | |||
9733 | } | |||
9734 | ||||
9735 | bool Sema::RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS) { | |||
9736 | if (SS.isInvalid()) | |||
9737 | return true; | |||
9738 | ||||
9739 | NestedNameSpecifierLoc QualifierLoc = SS.getWithLocInContext(Context); | |||
9740 | CurrentInstantiationRebuilder Rebuilder(*this, SS.getRange().getBegin(), | |||
9741 | DeclarationName()); | |||
9742 | NestedNameSpecifierLoc Rebuilt | |||
9743 | = Rebuilder.TransformNestedNameSpecifierLoc(QualifierLoc); | |||
9744 | if (!Rebuilt) | |||
9745 | return true; | |||
9746 | ||||
9747 | SS.Adopt(Rebuilt); | |||
9748 | return false; | |||
9749 | } | |||
9750 | ||||
9751 | /// \brief Rebuild the template parameters now that we know we're in a current | |||
9752 | /// instantiation. | |||
9753 | bool Sema::RebuildTemplateParamsInCurrentInstantiation( | |||
9754 | TemplateParameterList *Params) { | |||
9755 | for (unsigned I = 0, N = Params->size(); I != N; ++I) { | |||
9756 | Decl *Param = Params->getParam(I); | |||
9757 | ||||
9758 | // There is nothing to rebuild in a type parameter. | |||
9759 | if (isa<TemplateTypeParmDecl>(Param)) | |||
9760 | continue; | |||
9761 | ||||
9762 | // Rebuild the template parameter list of a template template parameter. | |||
9763 | if (TemplateTemplateParmDecl *TTP | |||
9764 | = dyn_cast<TemplateTemplateParmDecl>(Param)) { | |||
9765 | if (RebuildTemplateParamsInCurrentInstantiation( | |||
9766 | TTP->getTemplateParameters())) | |||
9767 | return true; | |||
9768 | ||||
9769 | continue; | |||
9770 | } | |||
9771 | ||||
9772 | // Rebuild the type of a non-type template parameter. | |||
9773 | NonTypeTemplateParmDecl *NTTP = cast<NonTypeTemplateParmDecl>(Param); | |||
9774 | TypeSourceInfo *NewTSI | |||
9775 | = RebuildTypeInCurrentInstantiation(NTTP->getTypeSourceInfo(), | |||
9776 | NTTP->getLocation(), | |||
9777 | NTTP->getDeclName()); | |||
9778 | if (!NewTSI) | |||
9779 | return true; | |||
9780 | ||||
9781 | if (NewTSI != NTTP->getTypeSourceInfo()) { | |||
9782 | NTTP->setTypeSourceInfo(NewTSI); | |||
9783 | NTTP->setType(NewTSI->getType()); | |||
9784 | } | |||
9785 | } | |||
9786 | ||||
9787 | return false; | |||
9788 | } | |||
9789 | ||||
9790 | /// \brief Produces a formatted string that describes the binding of | |||
9791 | /// template parameters to template arguments. | |||
9792 | std::string | |||
9793 | Sema::getTemplateArgumentBindingsText(const TemplateParameterList *Params, | |||
9794 | const TemplateArgumentList &Args) { | |||
9795 | return getTemplateArgumentBindingsText(Params, Args.data(), Args.size()); | |||
9796 | } | |||
9797 | ||||
9798 | std::string | |||
9799 | Sema::getTemplateArgumentBindingsText(const TemplateParameterList *Params, | |||
9800 | const TemplateArgument *Args, | |||
9801 | unsigned NumArgs) { | |||
9802 | SmallString<128> Str; | |||
9803 | llvm::raw_svector_ostream Out(Str); | |||
9804 | ||||
9805 | if (!Params || Params->size() == 0 || NumArgs == 0) | |||
9806 | return std::string(); | |||
9807 | ||||
9808 | for (unsigned I = 0, N = Params->size(); I != N; ++I) { | |||
9809 | if (I >= NumArgs) | |||
9810 | break; | |||
9811 | ||||
9812 | if (I == 0) | |||
9813 | Out << "[with "; | |||
9814 | else | |||
9815 | Out << ", "; | |||
9816 | ||||
9817 | if (const IdentifierInfo *Id = Params->getParam(I)->getIdentifier()) { | |||
9818 | Out << Id->getName(); | |||
9819 | } else { | |||
9820 | Out << '$' << I; | |||
9821 | } | |||
9822 | ||||
9823 | Out << " = "; | |||
9824 | Args[I].print(getPrintingPolicy(), Out); | |||
9825 | } | |||
9826 | ||||
9827 | Out << ']'; | |||
9828 | return Out.str(); | |||
9829 | } | |||
9830 | ||||
9831 | void Sema::MarkAsLateParsedTemplate(FunctionDecl *FD, Decl *FnD, | |||
9832 | CachedTokens &Toks) { | |||
9833 | if (!FD) | |||
9834 | return; | |||
9835 | ||||
9836 | auto LPT = llvm::make_unique<LateParsedTemplate>(); | |||
9837 | ||||
9838 | // Take tokens to avoid allocations | |||
9839 | LPT->Toks.swap(Toks); | |||
9840 | LPT->D = FnD; | |||
9841 | LateParsedTemplateMap.insert(std::make_pair(FD, std::move(LPT))); | |||
9842 | ||||
9843 | FD->setLateTemplateParsed(true); | |||
9844 | } | |||
9845 | ||||
9846 | void Sema::UnmarkAsLateParsedTemplate(FunctionDecl *FD) { | |||
9847 | if (!FD) | |||
9848 | return; | |||
9849 | FD->setLateTemplateParsed(false); | |||
9850 | } | |||
9851 | ||||
9852 | bool Sema::IsInsideALocalClassWithinATemplateFunction() { | |||
9853 | DeclContext *DC = CurContext; | |||
9854 | ||||
9855 | while (DC) { | |||
9856 | if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(CurContext)) { | |||
9857 | const FunctionDecl *FD = RD->isLocalClass(); | |||
9858 | return (FD && FD->getTemplatedKind() != FunctionDecl::TK_NonTemplate); | |||
9859 | } else if (DC->isTranslationUnit() || DC->isNamespace()) | |||
9860 | return false; | |||
9861 | ||||
9862 | DC = DC->getParent(); | |||
9863 | } | |||
9864 | return false; | |||
9865 | } | |||
9866 | ||||
9867 | namespace { | |||
9868 | /// \brief Walk the path from which a declaration was instantiated, and check | |||
9869 | /// that every explicit specialization along that path is visible. This enforces | |||
9870 | /// C++ [temp.expl.spec]/6: | |||
9871 | /// | |||
9872 | /// If a template, a member template or a member of a class template is | |||
9873 | /// explicitly specialized then that specialization shall be declared before | |||
9874 | /// the first use of that specialization that would cause an implicit | |||
9875 | /// instantiation to take place, in every translation unit in which such a | |||
9876 | /// use occurs; no diagnostic is required. | |||
9877 | /// | |||
9878 | /// and also C++ [temp.class.spec]/1: | |||
9879 | /// | |||
9880 | /// A partial specialization shall be declared before the first use of a | |||
9881 | /// class template specialization that would make use of the partial | |||
9882 | /// specialization as the result of an implicit or explicit instantiation | |||
9883 | /// in every translation unit in which such a use occurs; no diagnostic is | |||
9884 | /// required. | |||
9885 | class ExplicitSpecializationVisibilityChecker { | |||
9886 | Sema &S; | |||
9887 | SourceLocation Loc; | |||
9888 | llvm::SmallVector<Module *, 8> Modules; | |||
9889 | ||||
9890 | public: | |||
9891 | ExplicitSpecializationVisibilityChecker(Sema &S, SourceLocation Loc) | |||
9892 | : S(S), Loc(Loc) {} | |||
9893 | ||||
9894 | void check(NamedDecl *ND) { | |||
9895 | if (auto *FD = dyn_cast<FunctionDecl>(ND)) | |||
9896 | return checkImpl(FD); | |||
9897 | if (auto *RD = dyn_cast<CXXRecordDecl>(ND)) | |||
9898 | return checkImpl(RD); | |||
9899 | if (auto *VD = dyn_cast<VarDecl>(ND)) | |||
9900 | return checkImpl(VD); | |||
9901 | if (auto *ED = dyn_cast<EnumDecl>(ND)) | |||
9902 | return checkImpl(ED); | |||
9903 | } | |||
9904 | ||||
9905 | private: | |||
9906 | void diagnose(NamedDecl *D, bool IsPartialSpec) { | |||
9907 | auto Kind = IsPartialSpec ? Sema::MissingImportKind::PartialSpecialization | |||
9908 | : Sema::MissingImportKind::ExplicitSpecialization; | |||
9909 | const bool Recover = true; | |||
9910 | ||||
9911 | // If we got a custom set of modules (because only a subset of the | |||
9912 | // declarations are interesting), use them, otherwise let | |||
9913 | // diagnoseMissingImport intelligently pick some. | |||
9914 | if (Modules.empty()) | |||
9915 | S.diagnoseMissingImport(Loc, D, Kind, Recover); | |||
9916 | else | |||
9917 | S.diagnoseMissingImport(Loc, D, D->getLocation(), Modules, Kind, Recover); | |||
9918 | } | |||
9919 | ||||
9920 | // Check a specific declaration. There are three problematic cases: | |||
9921 | // | |||
9922 | // 1) The declaration is an explicit specialization of a template | |||
9923 | // specialization. | |||
9924 | // 2) The declaration is an explicit specialization of a member of an | |||
9925 | // templated class. | |||
9926 | // 3) The declaration is an instantiation of a template, and that template | |||
9927 | // is an explicit specialization of a member of a templated class. | |||
9928 | // | |||
9929 | // We don't need to go any deeper than that, as the instantiation of the | |||
9930 | // surrounding class / etc is not triggered by whatever triggered this | |||
9931 | // instantiation, and thus should be checked elsewhere. | |||
9932 | template<typename SpecDecl> | |||
9933 | void checkImpl(SpecDecl *Spec) { | |||
9934 | bool IsHiddenExplicitSpecialization = false; | |||
9935 | if (Spec->getTemplateSpecializationKind() == TSK_ExplicitSpecialization) { | |||
9936 | IsHiddenExplicitSpecialization = | |||
9937 | Spec->getMemberSpecializationInfo() | |||
9938 | ? !S.hasVisibleMemberSpecialization(Spec, &Modules) | |||
9939 | : !S.hasVisibleExplicitSpecialization(Spec, &Modules); | |||
9940 | } else { | |||
9941 | checkInstantiated(Spec); | |||
9942 | } | |||
9943 | ||||
9944 | if (IsHiddenExplicitSpecialization) | |||
9945 | diagnose(Spec->getMostRecentDecl(), false); | |||
9946 | } | |||
9947 | ||||
9948 | void checkInstantiated(FunctionDecl *FD) { | |||
9949 | if (auto *TD = FD->getPrimaryTemplate()) | |||
9950 | checkTemplate(TD); | |||
9951 | } | |||
9952 | ||||
9953 | void checkInstantiated(CXXRecordDecl *RD) { | |||
9954 | auto *SD = dyn_cast<ClassTemplateSpecializationDecl>(RD); | |||
9955 | if (!SD) | |||
9956 | return; | |||
9957 | ||||
9958 | auto From = SD->getSpecializedTemplateOrPartial(); | |||
9959 | if (auto *TD = From.dyn_cast<ClassTemplateDecl *>()) | |||
9960 | checkTemplate(TD); | |||
9961 | else if (auto *TD = | |||
9962 | From.dyn_cast<ClassTemplatePartialSpecializationDecl *>()) { | |||
9963 | if (!S.hasVisibleDeclaration(TD)) | |||
9964 | diagnose(TD, true); | |||
9965 | checkTemplate(TD); | |||
9966 | } | |||
9967 | } | |||
9968 | ||||
9969 | void checkInstantiated(VarDecl *RD) { | |||
9970 | auto *SD = dyn_cast<VarTemplateSpecializationDecl>(RD); | |||
9971 | if (!SD) | |||
9972 | return; | |||
9973 | ||||
9974 | auto From = SD->getSpecializedTemplateOrPartial(); | |||
9975 | if (auto *TD = From.dyn_cast<VarTemplateDecl *>()) | |||
9976 | checkTemplate(TD); | |||
9977 | else if (auto *TD = | |||
9978 | From.dyn_cast<VarTemplatePartialSpecializationDecl *>()) { | |||
9979 | if (!S.hasVisibleDeclaration(TD)) | |||
9980 | diagnose(TD, true); | |||
9981 | checkTemplate(TD); | |||
9982 | } | |||
9983 | } | |||
9984 | ||||
9985 | void checkInstantiated(EnumDecl *FD) {} | |||
9986 | ||||
9987 | template<typename TemplDecl> | |||
9988 | void checkTemplate(TemplDecl *TD) { | |||
9989 | if (TD->isMemberSpecialization()) { | |||
9990 | if (!S.hasVisibleMemberSpecialization(TD, &Modules)) | |||
9991 | diagnose(TD->getMostRecentDecl(), false); | |||
9992 | } | |||
9993 | } | |||
9994 | }; | |||
9995 | } // end anonymous namespace | |||
9996 | ||||
9997 | void Sema::checkSpecializationVisibility(SourceLocation Loc, NamedDecl *Spec) { | |||
9998 | if (!getLangOpts().Modules) | |||
9999 | return; | |||
10000 | ||||
10001 | ExplicitSpecializationVisibilityChecker(*this, Loc).check(Spec); | |||
10002 | } | |||
10003 | ||||
10004 | /// \brief Check whether a template partial specialization that we've discovered | |||
10005 | /// is hidden, and produce suitable diagnostics if so. | |||
10006 | void Sema::checkPartialSpecializationVisibility(SourceLocation Loc, | |||
10007 | NamedDecl *Spec) { | |||
10008 | llvm::SmallVector<Module *, 8> Modules; | |||
10009 | if (!hasVisibleDeclaration(Spec, &Modules)) | |||
10010 | diagnoseMissingImport(Loc, Spec, Spec->getLocation(), Modules, | |||
10011 | MissingImportKind::PartialSpecialization, | |||
10012 | /*Recover*/true); | |||
10013 | } |
1 | //===- DeclarationName.h - Representation of declaration names --*- C++ -*-===// |
2 | // |
3 | // The LLVM Compiler Infrastructure |
4 | // |
5 | // This file is distributed under the University of Illinois Open Source |
6 | // License. See LICENSE.TXT for details. |
7 | // |
8 | //===----------------------------------------------------------------------===// |
9 | // |
10 | // This file declares the DeclarationName and DeclarationNameTable classes. |
11 | // |
12 | //===----------------------------------------------------------------------===// |
13 | |
14 | #ifndef LLVM_CLANG_AST_DECLARATIONNAME_H |
15 | #define LLVM_CLANG_AST_DECLARATIONNAME_H |
16 | |
17 | #include "clang/Basic/Diagnostic.h" |
18 | #include "clang/Basic/IdentifierTable.h" |
19 | #include "clang/Basic/PartialDiagnostic.h" |
20 | #include "clang/Basic/SourceLocation.h" |
21 | #include "llvm/ADT/DenseMapInfo.h" |
22 | #include "llvm/Support/Compiler.h" |
23 | #include "llvm/Support/type_traits.h" |
24 | #include <cassert> |
25 | #include <cstdint> |
26 | #include <cstring> |
27 | #include <string> |
28 | |
29 | namespace clang { |
30 | |
31 | class ASTContext; |
32 | template <typename> class CanQual; |
33 | class CXXDeductionGuideNameExtra; |
34 | class CXXLiteralOperatorIdName; |
35 | class CXXOperatorIdName; |
36 | class CXXSpecialName; |
37 | class DeclarationNameExtra; |
38 | class IdentifierInfo; |
39 | class MultiKeywordSelector; |
40 | enum OverloadedOperatorKind : int; |
41 | struct PrintingPolicy; |
42 | class QualType; |
43 | class TemplateDecl; |
44 | class Type; |
45 | class TypeSourceInfo; |
46 | class UsingDirectiveDecl; |
47 | |
48 | using CanQualType = CanQual<Type>; |
49 | |
50 | /// DeclarationName - The name of a declaration. In the common case, |
51 | /// this just stores an IdentifierInfo pointer to a normal |
52 | /// name. However, it also provides encodings for Objective-C |
53 | /// selectors (optimizing zero- and one-argument selectors, which make |
54 | /// up 78% percent of all selectors in Cocoa.h) and special C++ names |
55 | /// for constructors, destructors, and conversion functions. |
56 | class DeclarationName { |
57 | public: |
58 | /// NameKind - The kind of name this object contains. |
59 | enum NameKind { |
60 | Identifier, |
61 | ObjCZeroArgSelector, |
62 | ObjCOneArgSelector, |
63 | ObjCMultiArgSelector, |
64 | CXXConstructorName, |
65 | CXXDestructorName, |
66 | CXXConversionFunctionName, |
67 | CXXDeductionGuideName, |
68 | CXXOperatorName, |
69 | CXXLiteralOperatorName, |
70 | CXXUsingDirective |
71 | }; |
72 | |
73 | static const unsigned NumNameKinds = CXXUsingDirective + 1; |
74 | |
75 | private: |
76 | friend class DeclarationNameTable; |
77 | friend class NamedDecl; |
78 | |
79 | /// StoredNameKind - The kind of name that is actually stored in the |
80 | /// upper bits of the Ptr field. This is only used internally. |
81 | /// |
82 | /// Note: The entries here are synchronized with the entries in Selector, |
83 | /// for efficient translation between the two. |
84 | enum StoredNameKind { |
85 | StoredIdentifier = 0, |
86 | StoredObjCZeroArgSelector = 0x01, |
87 | StoredObjCOneArgSelector = 0x02, |
88 | StoredDeclarationNameExtra = 0x03, |
89 | PtrMask = 0x03 |
90 | }; |
91 | |
92 | /// Ptr - The lowest two bits are used to express what kind of name |
93 | /// we're actually storing, using the values of NameKind. Depending |
94 | /// on the kind of name this is, the upper bits of Ptr may have one |
95 | /// of several different meanings: |
96 | /// |
97 | /// StoredIdentifier - The name is a normal identifier, and Ptr is |
98 | /// a normal IdentifierInfo pointer. |
99 | /// |
100 | /// StoredObjCZeroArgSelector - The name is an Objective-C |
101 | /// selector with zero arguments, and Ptr is an IdentifierInfo |
102 | /// pointer pointing to the selector name. |
103 | /// |
104 | /// StoredObjCOneArgSelector - The name is an Objective-C selector |
105 | /// with one argument, and Ptr is an IdentifierInfo pointer |
106 | /// pointing to the selector name. |
107 | /// |
108 | /// StoredDeclarationNameExtra - Ptr is actually a pointer to a |
109 | /// DeclarationNameExtra structure, whose first value will tell us |
110 | /// whether this is an Objective-C selector, C++ operator-id name, |
111 | /// or special C++ name. |
112 | uintptr_t Ptr = 0; |
113 | |
114 | // Construct a declaration name from the name of a C++ constructor, |
115 | // destructor, or conversion function. |
116 | DeclarationName(DeclarationNameExtra *Name) |
117 | : Ptr(reinterpret_cast<uintptr_t>(Name)) { |
118 | assert((Ptr & PtrMask) == 0 && "Improperly aligned DeclarationNameExtra")(static_cast <bool> ((Ptr & PtrMask) == 0 && "Improperly aligned DeclarationNameExtra") ? void (0) : __assert_fail ("(Ptr & PtrMask) == 0 && \"Improperly aligned DeclarationNameExtra\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/AST/DeclarationName.h" , 118, __extension__ __PRETTY_FUNCTION__)); |
119 | Ptr |= StoredDeclarationNameExtra; |
120 | } |
121 | |
122 | /// Construct a declaration name from a raw pointer. |
123 | DeclarationName(uintptr_t Ptr) : Ptr(Ptr) {} |
124 | |
125 | /// getStoredNameKind - Return the kind of object that is stored in |
126 | /// Ptr. |
127 | StoredNameKind getStoredNameKind() const { |
128 | return static_cast<StoredNameKind>(Ptr & PtrMask); |
129 | } |
130 | |
131 | /// getExtra - Get the "extra" information associated with this |
132 | /// multi-argument selector or C++ special name. |
133 | DeclarationNameExtra *getExtra() const { |
134 | assert(getStoredNameKind() == StoredDeclarationNameExtra &&(static_cast <bool> (getStoredNameKind() == StoredDeclarationNameExtra && "Declaration name does not store an Extra structure" ) ? void (0) : __assert_fail ("getStoredNameKind() == StoredDeclarationNameExtra && \"Declaration name does not store an Extra structure\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/AST/DeclarationName.h" , 135, __extension__ __PRETTY_FUNCTION__)) |
135 | "Declaration name does not store an Extra structure")(static_cast <bool> (getStoredNameKind() == StoredDeclarationNameExtra && "Declaration name does not store an Extra structure" ) ? void (0) : __assert_fail ("getStoredNameKind() == StoredDeclarationNameExtra && \"Declaration name does not store an Extra structure\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/AST/DeclarationName.h" , 135, __extension__ __PRETTY_FUNCTION__)); |
136 | return reinterpret_cast<DeclarationNameExtra *>(Ptr & ~PtrMask); |
137 | } |
138 | |
139 | /// getAsCXXSpecialName - If the stored pointer is actually a |
140 | /// CXXSpecialName, returns a pointer to it. Otherwise, returns |
141 | /// a NULL pointer. |
142 | CXXSpecialName *getAsCXXSpecialName() const { |
143 | NameKind Kind = getNameKind(); |
144 | if (Kind >= CXXConstructorName && Kind <= CXXConversionFunctionName) |
145 | return reinterpret_cast<CXXSpecialName *>(getExtra()); |
146 | return nullptr; |
147 | } |
148 | |
149 | /// If the stored pointer is actually a CXXDeductionGuideNameExtra, returns a |
150 | /// pointer to it. Otherwise, returns a NULL pointer. |
151 | CXXDeductionGuideNameExtra *getAsCXXDeductionGuideNameExtra() const { |
152 | if (getNameKind() == CXXDeductionGuideName) |
153 | return reinterpret_cast<CXXDeductionGuideNameExtra *>(getExtra()); |
154 | return nullptr; |
155 | } |
156 | |
157 | /// getAsCXXOperatorIdName |
158 | CXXOperatorIdName *getAsCXXOperatorIdName() const { |
159 | if (getNameKind() == CXXOperatorName) |
160 | return reinterpret_cast<CXXOperatorIdName *>(getExtra()); |
161 | return nullptr; |
162 | } |
163 | |
164 | CXXLiteralOperatorIdName *getAsCXXLiteralOperatorIdName() const { |
165 | if (getNameKind() == CXXLiteralOperatorName) |
166 | return reinterpret_cast<CXXLiteralOperatorIdName *>(getExtra()); |
167 | return nullptr; |
168 | } |
169 | |
170 | /// getFETokenInfoAsVoidSlow - Retrieves the front end-specified pointer |
171 | /// for this name as a void pointer if it's not an identifier. |
172 | void *getFETokenInfoAsVoidSlow() const; |
173 | |
174 | public: |
175 | /// DeclarationName - Used to create an empty selector. |
176 | DeclarationName() = default; |
177 | |
178 | // Construct a declaration name from an IdentifierInfo *. |
179 | DeclarationName(const IdentifierInfo *II) |
180 | : Ptr(reinterpret_cast<uintptr_t>(II)) { |
181 | assert((Ptr & PtrMask) == 0 && "Improperly aligned IdentifierInfo")(static_cast <bool> ((Ptr & PtrMask) == 0 && "Improperly aligned IdentifierInfo") ? void (0) : __assert_fail ("(Ptr & PtrMask) == 0 && \"Improperly aligned IdentifierInfo\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/AST/DeclarationName.h" , 181, __extension__ __PRETTY_FUNCTION__)); |
182 | } |
183 | |
184 | // Construct a declaration name from an Objective-C selector. |
185 | DeclarationName(Selector Sel) : Ptr(Sel.InfoPtr) {} |
186 | |
187 | /// getUsingDirectiveName - Return name for all using-directives. |
188 | static DeclarationName getUsingDirectiveName(); |
189 | |
190 | // operator bool() - Evaluates true when this declaration name is |
191 | // non-empty. |
192 | explicit operator bool() const { |
193 | return ((Ptr & PtrMask) != 0) || |
194 | (reinterpret_cast<IdentifierInfo *>(Ptr & ~PtrMask)); |
195 | } |
196 | |
197 | /// \brief Evaluates true when this declaration name is empty. |
198 | bool isEmpty() const { |
199 | return !*this; |
200 | } |
201 | |
202 | /// Predicate functions for querying what type of name this is. |
203 | bool isIdentifier() const { return getStoredNameKind() == StoredIdentifier; } |
204 | bool isObjCZeroArgSelector() const { |
205 | return getStoredNameKind() == StoredObjCZeroArgSelector; |
206 | } |
207 | bool isObjCOneArgSelector() const { |
208 | return getStoredNameKind() == StoredObjCOneArgSelector; |
209 | } |
210 | |
211 | /// getNameKind - Determine what kind of name this is. |
212 | NameKind getNameKind() const; |
213 | |
214 | /// \brief Determines whether the name itself is dependent, e.g., because it |
215 | /// involves a C++ type that is itself dependent. |
216 | /// |
217 | /// Note that this does not capture all of the notions of "dependent name", |
218 | /// because an identifier can be a dependent name if it is used as the |
219 | /// callee in a call expression with dependent arguments. |
220 | bool isDependentName() const; |
221 | |
222 | /// getNameAsString - Retrieve the human-readable string for this name. |
223 | std::string getAsString() const; |
224 | |
225 | /// getAsIdentifierInfo - Retrieve the IdentifierInfo * stored in |
226 | /// this declaration name, or NULL if this declaration name isn't a |
227 | /// simple identifier. |
228 | IdentifierInfo *getAsIdentifierInfo() const { |
229 | if (isIdentifier()) |
230 | return reinterpret_cast<IdentifierInfo *>(Ptr); |
231 | return nullptr; |
232 | } |
233 | |
234 | /// getAsOpaqueInteger - Get the representation of this declaration |
235 | /// name as an opaque integer. |
236 | uintptr_t getAsOpaqueInteger() const { return Ptr; } |
237 | |
238 | /// getAsOpaquePtr - Get the representation of this declaration name as |
239 | /// an opaque pointer. |
240 | void *getAsOpaquePtr() const { return reinterpret_cast<void*>(Ptr); } |
241 | |
242 | static DeclarationName getFromOpaquePtr(void *P) { |
243 | DeclarationName N; |
244 | N.Ptr = reinterpret_cast<uintptr_t> (P); |
245 | return N; |
246 | } |
247 | |
248 | static DeclarationName getFromOpaqueInteger(uintptr_t P) { |
249 | DeclarationName N; |
250 | N.Ptr = P; |
251 | return N; |
252 | } |
253 | |
254 | /// getCXXNameType - If this name is one of the C++ names (of a |
255 | /// constructor, destructor, or conversion function), return the |
256 | /// type associated with that name. |
257 | QualType getCXXNameType() const; |
258 | |
259 | /// If this name is the name of a C++ deduction guide, return the |
260 | /// template associated with that name. |
261 | TemplateDecl *getCXXDeductionGuideTemplate() const; |
262 | |
263 | /// getCXXOverloadedOperator - If this name is the name of an |
264 | /// overloadable operator in C++ (e.g., @c operator+), retrieve the |
265 | /// kind of overloaded operator. |
266 | OverloadedOperatorKind getCXXOverloadedOperator() const; |
267 | |
268 | /// getCXXLiteralIdentifier - If this name is the name of a literal |
269 | /// operator, retrieve the identifier associated with it. |
270 | IdentifierInfo *getCXXLiteralIdentifier() const; |
271 | |
272 | /// getObjCSelector - Get the Objective-C selector stored in this |
273 | /// declaration name. |
274 | Selector getObjCSelector() const { |
275 | assert((getNameKind() == ObjCZeroArgSelector ||(static_cast <bool> ((getNameKind() == ObjCZeroArgSelector || getNameKind() == ObjCOneArgSelector || getNameKind() == ObjCMultiArgSelector || Ptr == 0) && "Not a selector!") ? void (0) : __assert_fail ("(getNameKind() == ObjCZeroArgSelector || getNameKind() == ObjCOneArgSelector || getNameKind() == ObjCMultiArgSelector || Ptr == 0) && \"Not a selector!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/AST/DeclarationName.h" , 278, __extension__ __PRETTY_FUNCTION__)) |
276 | getNameKind() == ObjCOneArgSelector ||(static_cast <bool> ((getNameKind() == ObjCZeroArgSelector || getNameKind() == ObjCOneArgSelector || getNameKind() == ObjCMultiArgSelector || Ptr == 0) && "Not a selector!") ? void (0) : __assert_fail ("(getNameKind() == ObjCZeroArgSelector || getNameKind() == ObjCOneArgSelector || getNameKind() == ObjCMultiArgSelector || Ptr == 0) && \"Not a selector!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/AST/DeclarationName.h" , 278, __extension__ __PRETTY_FUNCTION__)) |
277 | getNameKind() == ObjCMultiArgSelector ||(static_cast <bool> ((getNameKind() == ObjCZeroArgSelector || getNameKind() == ObjCOneArgSelector || getNameKind() == ObjCMultiArgSelector || Ptr == 0) && "Not a selector!") ? void (0) : __assert_fail ("(getNameKind() == ObjCZeroArgSelector || getNameKind() == ObjCOneArgSelector || getNameKind() == ObjCMultiArgSelector || Ptr == 0) && \"Not a selector!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/AST/DeclarationName.h" , 278, __extension__ __PRETTY_FUNCTION__)) |
278 | Ptr == 0) && "Not a selector!")(static_cast <bool> ((getNameKind() == ObjCZeroArgSelector || getNameKind() == ObjCOneArgSelector || getNameKind() == ObjCMultiArgSelector || Ptr == 0) && "Not a selector!") ? void (0) : __assert_fail ("(getNameKind() == ObjCZeroArgSelector || getNameKind() == ObjCOneArgSelector || getNameKind() == ObjCMultiArgSelector || Ptr == 0) && \"Not a selector!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/AST/DeclarationName.h" , 278, __extension__ __PRETTY_FUNCTION__)); |
279 | return Selector(Ptr); |
280 | } |
281 | |
282 | /// getFETokenInfo/setFETokenInfo - The language front-end is |
283 | /// allowed to associate arbitrary metadata with some kinds of |
284 | /// declaration names, including normal identifiers and C++ |
285 | /// constructors, destructors, and conversion functions. |
286 | template<typename T> |
287 | T *getFETokenInfo() const { |
288 | if (const IdentifierInfo *Info = getAsIdentifierInfo()) |
289 | return Info->getFETokenInfo<T>(); |
290 | return static_cast<T*>(getFETokenInfoAsVoidSlow()); |
291 | } |
292 | |
293 | void setFETokenInfo(void *T); |
294 | |
295 | /// operator== - Determine whether the specified names are identical.. |
296 | friend bool operator==(DeclarationName LHS, DeclarationName RHS) { |
297 | return LHS.Ptr == RHS.Ptr; |
298 | } |
299 | |
300 | /// operator!= - Determine whether the specified names are different. |
301 | friend bool operator!=(DeclarationName LHS, DeclarationName RHS) { |
302 | return LHS.Ptr != RHS.Ptr; |
303 | } |
304 | |
305 | static DeclarationName getEmptyMarker() { |
306 | return DeclarationName(uintptr_t(-1)); |
307 | } |
308 | |
309 | static DeclarationName getTombstoneMarker() { |
310 | return DeclarationName(uintptr_t(-2)); |
311 | } |
312 | |
313 | static int compare(DeclarationName LHS, DeclarationName RHS); |
314 | |
315 | void print(raw_ostream &OS, const PrintingPolicy &Policy); |
316 | |
317 | void dump() const; |
318 | }; |
319 | |
320 | raw_ostream &operator<<(raw_ostream &OS, DeclarationName N); |
321 | |
322 | /// Ordering on two declaration names. If both names are identifiers, |
323 | /// this provides a lexicographical ordering. |
324 | inline bool operator<(DeclarationName LHS, DeclarationName RHS) { |
325 | return DeclarationName::compare(LHS, RHS) < 0; |
326 | } |
327 | |
328 | /// Ordering on two declaration names. If both names are identifiers, |
329 | /// this provides a lexicographical ordering. |
330 | inline bool operator>(DeclarationName LHS, DeclarationName RHS) { |
331 | return DeclarationName::compare(LHS, RHS) > 0; |
332 | } |
333 | |
334 | /// Ordering on two declaration names. If both names are identifiers, |
335 | /// this provides a lexicographical ordering. |
336 | inline bool operator<=(DeclarationName LHS, DeclarationName RHS) { |
337 | return DeclarationName::compare(LHS, RHS) <= 0; |
338 | } |
339 | |
340 | /// Ordering on two declaration names. If both names are identifiers, |
341 | /// this provides a lexicographical ordering. |
342 | inline bool operator>=(DeclarationName LHS, DeclarationName RHS) { |
343 | return DeclarationName::compare(LHS, RHS) >= 0; |
344 | } |
345 | |
346 | /// DeclarationNameTable - Used to store and retrieve DeclarationName |
347 | /// instances for the various kinds of declaration names, e.g., normal |
348 | /// identifiers, C++ constructor names, etc. This class contains |
349 | /// uniqued versions of each of the C++ special names, which can be |
350 | /// retrieved using its member functions (e.g., |
351 | /// getCXXConstructorName). |
352 | class DeclarationNameTable { |
353 | const ASTContext &Ctx; |
354 | |
355 | // Actually a FoldingSet<CXXSpecialName> * |
356 | void *CXXSpecialNamesImpl; |
357 | |
358 | // Operator names |
359 | CXXOperatorIdName *CXXOperatorNames; |
360 | |
361 | // Actually a CXXOperatorIdName* |
362 | void *CXXLiteralOperatorNames; |
363 | |
364 | // FoldingSet<CXXDeductionGuideNameExtra> * |
365 | void *CXXDeductionGuideNames; |
366 | |
367 | public: |
368 | DeclarationNameTable(const ASTContext &C); |
369 | DeclarationNameTable(const DeclarationNameTable &) = delete; |
370 | DeclarationNameTable &operator=(const DeclarationNameTable &) = delete; |
371 | |
372 | ~DeclarationNameTable(); |
373 | |
374 | /// getIdentifier - Create a declaration name that is a simple |
375 | /// identifier. |
376 | DeclarationName getIdentifier(const IdentifierInfo *ID) { |
377 | return DeclarationName(ID); |
378 | } |
379 | |
380 | /// getCXXConstructorName - Returns the name of a C++ constructor |
381 | /// for the given Type. |
382 | DeclarationName getCXXConstructorName(CanQualType Ty); |
383 | |
384 | /// getCXXDestructorName - Returns the name of a C++ destructor |
385 | /// for the given Type. |
386 | DeclarationName getCXXDestructorName(CanQualType Ty); |
387 | |
388 | /// Returns the name of a C++ deduction guide for the given template. |
389 | DeclarationName getCXXDeductionGuideName(TemplateDecl *TD); |
390 | |
391 | /// getCXXConversionFunctionName - Returns the name of a C++ |
392 | /// conversion function for the given Type. |
393 | DeclarationName getCXXConversionFunctionName(CanQualType Ty); |
394 | |
395 | /// getCXXSpecialName - Returns a declaration name for special kind |
396 | /// of C++ name, e.g., for a constructor, destructor, or conversion |
397 | /// function. |
398 | DeclarationName getCXXSpecialName(DeclarationName::NameKind Kind, |
399 | CanQualType Ty); |
400 | |
401 | /// getCXXOperatorName - Get the name of the overloadable C++ |
402 | /// operator corresponding to Op. |
403 | DeclarationName getCXXOperatorName(OverloadedOperatorKind Op); |
404 | |
405 | /// getCXXLiteralOperatorName - Get the name of the literal operator function |
406 | /// with II as the identifier. |
407 | DeclarationName getCXXLiteralOperatorName(IdentifierInfo *II); |
408 | }; |
409 | |
410 | /// DeclarationNameLoc - Additional source/type location info |
411 | /// for a declaration name. Needs a DeclarationName in order |
412 | /// to be interpreted correctly. |
413 | struct DeclarationNameLoc { |
414 | // The source location for identifier stored elsewhere. |
415 | // struct {} Identifier; |
416 | |
417 | // Type info for constructors, destructors and conversion functions. |
418 | // Locations (if any) for the tilde (destructor) or operator keyword |
419 | // (conversion) are stored elsewhere. |
420 | struct NT { |
421 | TypeSourceInfo *TInfo; |
422 | }; |
423 | |
424 | // The location (if any) of the operator keyword is stored elsewhere. |
425 | struct CXXOpName { |
426 | unsigned BeginOpNameLoc; |
427 | unsigned EndOpNameLoc; |
428 | }; |
429 | |
430 | // The location (if any) of the operator keyword is stored elsewhere. |
431 | struct CXXLitOpName { |
432 | unsigned OpNameLoc; |
433 | }; |
434 | |
435 | // struct {} CXXUsingDirective; |
436 | // struct {} ObjCZeroArgSelector; |
437 | // struct {} ObjCOneArgSelector; |
438 | // struct {} ObjCMultiArgSelector; |
439 | union { |
440 | struct NT NamedType; |
441 | struct CXXOpName CXXOperatorName; |
442 | struct CXXLitOpName CXXLiteralOperatorName; |
443 | }; |
444 | |
445 | DeclarationNameLoc(DeclarationName Name); |
446 | |
447 | // FIXME: this should go away once all DNLocs are properly initialized. |
448 | DeclarationNameLoc() { memset((void*) this, 0, sizeof(*this)); } |
449 | }; |
450 | |
451 | /// DeclarationNameInfo - A collector data type for bundling together |
452 | /// a DeclarationName and the correspnding source/type location info. |
453 | struct DeclarationNameInfo { |
454 | private: |
455 | /// Name - The declaration name, also encoding name kind. |
456 | DeclarationName Name; |
457 | |
458 | /// Loc - The main source location for the declaration name. |
459 | SourceLocation NameLoc; |
460 | |
461 | /// Info - Further source/type location info for special kinds of names. |
462 | DeclarationNameLoc LocInfo; |
463 | |
464 | public: |
465 | // FIXME: remove it. |
466 | DeclarationNameInfo() = default; |
467 | |
468 | DeclarationNameInfo(DeclarationName Name, SourceLocation NameLoc) |
469 | : Name(Name), NameLoc(NameLoc), LocInfo(Name) {} |
470 | |
471 | DeclarationNameInfo(DeclarationName Name, SourceLocation NameLoc, |
472 | DeclarationNameLoc LocInfo) |
473 | : Name(Name), NameLoc(NameLoc), LocInfo(LocInfo) {} |
474 | |
475 | /// getName - Returns the embedded declaration name. |
476 | DeclarationName getName() const { return Name; } |
477 | |
478 | /// setName - Sets the embedded declaration name. |
479 | void setName(DeclarationName N) { Name = N; } |
480 | |
481 | /// getLoc - Returns the main location of the declaration name. |
482 | SourceLocation getLoc() const { return NameLoc; } |
483 | |
484 | /// setLoc - Sets the main location of the declaration name. |
485 | void setLoc(SourceLocation L) { NameLoc = L; } |
486 | |
487 | const DeclarationNameLoc &getInfo() const { return LocInfo; } |
488 | DeclarationNameLoc &getInfo() { return LocInfo; } |
489 | void setInfo(const DeclarationNameLoc &Info) { LocInfo = Info; } |
490 | |
491 | /// getNamedTypeInfo - Returns the source type info associated to |
492 | /// the name. Assumes it is a constructor, destructor or conversion. |
493 | TypeSourceInfo *getNamedTypeInfo() const { |
494 | assert(Name.getNameKind() == DeclarationName::CXXConstructorName ||(static_cast <bool> (Name.getNameKind() == DeclarationName ::CXXConstructorName || Name.getNameKind() == DeclarationName ::CXXDestructorName || Name.getNameKind() == DeclarationName:: CXXConversionFunctionName) ? void (0) : __assert_fail ("Name.getNameKind() == DeclarationName::CXXConstructorName || Name.getNameKind() == DeclarationName::CXXDestructorName || Name.getNameKind() == DeclarationName::CXXConversionFunctionName" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/AST/DeclarationName.h" , 496, __extension__ __PRETTY_FUNCTION__)) |
495 | Name.getNameKind() == DeclarationName::CXXDestructorName ||(static_cast <bool> (Name.getNameKind() == DeclarationName ::CXXConstructorName || Name.getNameKind() == DeclarationName ::CXXDestructorName || Name.getNameKind() == DeclarationName:: CXXConversionFunctionName) ? void (0) : __assert_fail ("Name.getNameKind() == DeclarationName::CXXConstructorName || Name.getNameKind() == DeclarationName::CXXDestructorName || Name.getNameKind() == DeclarationName::CXXConversionFunctionName" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/AST/DeclarationName.h" , 496, __extension__ __PRETTY_FUNCTION__)) |
496 | Name.getNameKind() == DeclarationName::CXXConversionFunctionName)(static_cast <bool> (Name.getNameKind() == DeclarationName ::CXXConstructorName || Name.getNameKind() == DeclarationName ::CXXDestructorName || Name.getNameKind() == DeclarationName:: CXXConversionFunctionName) ? void (0) : __assert_fail ("Name.getNameKind() == DeclarationName::CXXConstructorName || Name.getNameKind() == DeclarationName::CXXDestructorName || Name.getNameKind() == DeclarationName::CXXConversionFunctionName" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/AST/DeclarationName.h" , 496, __extension__ __PRETTY_FUNCTION__)); |
497 | return LocInfo.NamedType.TInfo; |
498 | } |
499 | |
500 | /// setNamedTypeInfo - Sets the source type info associated to |
501 | /// the name. Assumes it is a constructor, destructor or conversion. |
502 | void setNamedTypeInfo(TypeSourceInfo *TInfo) { |
503 | assert(Name.getNameKind() == DeclarationName::CXXConstructorName ||(static_cast <bool> (Name.getNameKind() == DeclarationName ::CXXConstructorName || Name.getNameKind() == DeclarationName ::CXXDestructorName || Name.getNameKind() == DeclarationName:: CXXConversionFunctionName) ? void (0) : __assert_fail ("Name.getNameKind() == DeclarationName::CXXConstructorName || Name.getNameKind() == DeclarationName::CXXDestructorName || Name.getNameKind() == DeclarationName::CXXConversionFunctionName" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/AST/DeclarationName.h" , 505, __extension__ __PRETTY_FUNCTION__)) |
504 | Name.getNameKind() == DeclarationName::CXXDestructorName ||(static_cast <bool> (Name.getNameKind() == DeclarationName ::CXXConstructorName || Name.getNameKind() == DeclarationName ::CXXDestructorName || Name.getNameKind() == DeclarationName:: CXXConversionFunctionName) ? void (0) : __assert_fail ("Name.getNameKind() == DeclarationName::CXXConstructorName || Name.getNameKind() == DeclarationName::CXXDestructorName || Name.getNameKind() == DeclarationName::CXXConversionFunctionName" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/AST/DeclarationName.h" , 505, __extension__ __PRETTY_FUNCTION__)) |
505 | Name.getNameKind() == DeclarationName::CXXConversionFunctionName)(static_cast <bool> (Name.getNameKind() == DeclarationName ::CXXConstructorName || Name.getNameKind() == DeclarationName ::CXXDestructorName || Name.getNameKind() == DeclarationName:: CXXConversionFunctionName) ? void (0) : __assert_fail ("Name.getNameKind() == DeclarationName::CXXConstructorName || Name.getNameKind() == DeclarationName::CXXDestructorName || Name.getNameKind() == DeclarationName::CXXConversionFunctionName" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/AST/DeclarationName.h" , 505, __extension__ __PRETTY_FUNCTION__)); |
506 | LocInfo.NamedType.TInfo = TInfo; |
507 | } |
508 | |
509 | /// getCXXOperatorNameRange - Gets the range of the operator name |
510 | /// (without the operator keyword). Assumes it is a (non-literal) operator. |
511 | SourceRange getCXXOperatorNameRange() const { |
512 | assert(Name.getNameKind() == DeclarationName::CXXOperatorName)(static_cast <bool> (Name.getNameKind() == DeclarationName ::CXXOperatorName) ? void (0) : __assert_fail ("Name.getNameKind() == DeclarationName::CXXOperatorName" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/AST/DeclarationName.h" , 512, __extension__ __PRETTY_FUNCTION__)); |
513 | return SourceRange( |
514 | SourceLocation::getFromRawEncoding(LocInfo.CXXOperatorName.BeginOpNameLoc), |
515 | SourceLocation::getFromRawEncoding(LocInfo.CXXOperatorName.EndOpNameLoc) |
516 | ); |
517 | } |
518 | |
519 | /// setCXXOperatorNameRange - Sets the range of the operator name |
520 | /// (without the operator keyword). Assumes it is a C++ operator. |
521 | void setCXXOperatorNameRange(SourceRange R) { |
522 | assert(Name.getNameKind() == DeclarationName::CXXOperatorName)(static_cast <bool> (Name.getNameKind() == DeclarationName ::CXXOperatorName) ? void (0) : __assert_fail ("Name.getNameKind() == DeclarationName::CXXOperatorName" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/AST/DeclarationName.h" , 522, __extension__ __PRETTY_FUNCTION__)); |
523 | LocInfo.CXXOperatorName.BeginOpNameLoc = R.getBegin().getRawEncoding(); |
524 | LocInfo.CXXOperatorName.EndOpNameLoc = R.getEnd().getRawEncoding(); |
525 | } |
526 | |
527 | /// getCXXLiteralOperatorNameLoc - Returns the location of the literal |
528 | /// operator name (not the operator keyword). |
529 | /// Assumes it is a literal operator. |
530 | SourceLocation getCXXLiteralOperatorNameLoc() const { |
531 | assert(Name.getNameKind() == DeclarationName::CXXLiteralOperatorName)(static_cast <bool> (Name.getNameKind() == DeclarationName ::CXXLiteralOperatorName) ? void (0) : __assert_fail ("Name.getNameKind() == DeclarationName::CXXLiteralOperatorName" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/AST/DeclarationName.h" , 531, __extension__ __PRETTY_FUNCTION__)); |
532 | return SourceLocation:: |
533 | getFromRawEncoding(LocInfo.CXXLiteralOperatorName.OpNameLoc); |
534 | } |
535 | |
536 | /// setCXXLiteralOperatorNameLoc - Sets the location of the literal |
537 | /// operator name (not the operator keyword). |
538 | /// Assumes it is a literal operator. |
539 | void setCXXLiteralOperatorNameLoc(SourceLocation Loc) { |
540 | assert(Name.getNameKind() == DeclarationName::CXXLiteralOperatorName)(static_cast <bool> (Name.getNameKind() == DeclarationName ::CXXLiteralOperatorName) ? void (0) : __assert_fail ("Name.getNameKind() == DeclarationName::CXXLiteralOperatorName" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/AST/DeclarationName.h" , 540, __extension__ __PRETTY_FUNCTION__)); |
541 | LocInfo.CXXLiteralOperatorName.OpNameLoc = Loc.getRawEncoding(); |
542 | } |
543 | |
544 | /// \brief Determine whether this name involves a template parameter. |
545 | bool isInstantiationDependent() const; |
546 | |
547 | /// \brief Determine whether this name contains an unexpanded |
548 | /// parameter pack. |
549 | bool containsUnexpandedParameterPack() const; |
550 | |
551 | /// getAsString - Retrieve the human-readable string for this name. |
552 | std::string getAsString() const; |
553 | |
554 | /// printName - Print the human-readable name to a stream. |
555 | void printName(raw_ostream &OS) const; |
556 | |
557 | /// getBeginLoc - Retrieve the location of the first token. |
558 | SourceLocation getBeginLoc() const { return NameLoc; } |
559 | |
560 | /// getEndLoc - Retrieve the location of the last token. |
561 | SourceLocation getEndLoc() const; |
562 | |
563 | /// getSourceRange - The range of the declaration name. |
564 | SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)) { |
565 | return SourceRange(getLocStart(), getLocEnd()); |
566 | } |
567 | |
568 | SourceLocation getLocStart() const LLVM_READONLY__attribute__((__pure__)) { |
569 | return getBeginLoc(); |
570 | } |
571 | |
572 | SourceLocation getLocEnd() const LLVM_READONLY__attribute__((__pure__)) { |
573 | SourceLocation EndLoc = getEndLoc(); |
574 | return EndLoc.isValid() ? EndLoc : getLocStart(); |
575 | } |
576 | }; |
577 | |
578 | /// Insertion operator for diagnostics. This allows sending DeclarationName's |
579 | /// into a diagnostic with <<. |
580 | inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, |
581 | DeclarationName N) { |
582 | DB.AddTaggedVal(N.getAsOpaqueInteger(), |
583 | DiagnosticsEngine::ak_declarationname); |
584 | return DB; |
585 | } |
586 | |
587 | /// Insertion operator for partial diagnostics. This allows binding |
588 | /// DeclarationName's into a partial diagnostic with <<. |
589 | inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, |
590 | DeclarationName N) { |
591 | PD.AddTaggedVal(N.getAsOpaqueInteger(), |
592 | DiagnosticsEngine::ak_declarationname); |
593 | return PD; |
594 | } |
595 | |
596 | inline raw_ostream &operator<<(raw_ostream &OS, |
597 | DeclarationNameInfo DNInfo) { |
598 | DNInfo.printName(OS); |
599 | return OS; |
600 | } |
601 | |
602 | } // namespace clang |
603 | |
604 | namespace llvm { |
605 | |
606 | /// Define DenseMapInfo so that DeclarationNames can be used as keys |
607 | /// in DenseMap and DenseSets. |
608 | template<> |
609 | struct DenseMapInfo<clang::DeclarationName> { |
610 | static inline clang::DeclarationName getEmptyKey() { |
611 | return clang::DeclarationName::getEmptyMarker(); |
612 | } |
613 | |
614 | static inline clang::DeclarationName getTombstoneKey() { |
615 | return clang::DeclarationName::getTombstoneMarker(); |
616 | } |
617 | |
618 | static unsigned getHashValue(clang::DeclarationName Name) { |
619 | return DenseMapInfo<void*>::getHashValue(Name.getAsOpaquePtr()); |
620 | } |
621 | |
622 | static inline bool |
623 | isEqual(clang::DeclarationName LHS, clang::DeclarationName RHS) { |
624 | return LHS == RHS; |
625 | } |
626 | }; |
627 | |
628 | template <> |
629 | struct isPodLike<clang::DeclarationName> { static const bool value = true; }; |
630 | |
631 | } // namespace llvm |
632 | |
633 | #endif // LLVM_CLANG_AST_DECLARATIONNAME_H |
1 | //===- PartialDiagnostic.h - Diagnostic "closures" --------------*- C++ -*-===// | |||
2 | // | |||
3 | // The LLVM Compiler Infrastructure | |||
4 | // | |||
5 | // This file is distributed under the University of Illinois Open Source | |||
6 | // License. See LICENSE.TXT for details. | |||
7 | // | |||
8 | //===----------------------------------------------------------------------===// | |||
9 | // | |||
10 | /// \file | |||
11 | /// \brief Implements a partial diagnostic that can be emitted anwyhere | |||
12 | /// in a DiagnosticBuilder stream. | |||
13 | // | |||
14 | //===----------------------------------------------------------------------===// | |||
15 | ||||
16 | #ifndef LLVM_CLANG_BASIC_PARTIALDIAGNOSTIC_H | |||
17 | #define LLVM_CLANG_BASIC_PARTIALDIAGNOSTIC_H | |||
18 | ||||
19 | #include "clang/Basic/Diagnostic.h" | |||
20 | #include "clang/Basic/LLVM.h" | |||
21 | #include "clang/Basic/SourceLocation.h" | |||
22 | #include "llvm/ADT/SmallVector.h" | |||
23 | #include "llvm/ADT/StringRef.h" | |||
24 | #include <cassert> | |||
25 | #include <cstdint> | |||
26 | #include <string> | |||
27 | #include <type_traits> | |||
28 | #include <utility> | |||
29 | ||||
30 | namespace clang { | |||
31 | ||||
32 | class DeclContext; | |||
33 | class IdentifierInfo; | |||
34 | ||||
35 | class PartialDiagnostic { | |||
36 | public: | |||
37 | enum { | |||
38 | // The MaxArguments and MaxFixItHints member enum values from | |||
39 | // DiagnosticsEngine are private but DiagnosticsEngine declares | |||
40 | // PartialDiagnostic a friend. These enum values are redeclared | |||
41 | // here so that the nested Storage class below can access them. | |||
42 | MaxArguments = DiagnosticsEngine::MaxArguments | |||
43 | }; | |||
44 | ||||
45 | struct Storage { | |||
46 | enum { | |||
47 | /// \brief The maximum number of arguments we can hold. We | |||
48 | /// currently only support up to 10 arguments (%0-%9). | |||
49 | /// | |||
50 | /// A single diagnostic with more than that almost certainly has to | |||
51 | /// be simplified anyway. | |||
52 | MaxArguments = PartialDiagnostic::MaxArguments | |||
53 | }; | |||
54 | ||||
55 | /// \brief The number of entries in Arguments. | |||
56 | unsigned char NumDiagArgs = 0; | |||
57 | ||||
58 | /// \brief Specifies for each argument whether it is in DiagArgumentsStr | |||
59 | /// or in DiagArguments. | |||
60 | unsigned char DiagArgumentsKind[MaxArguments]; | |||
61 | ||||
62 | /// \brief The values for the various substitution positions. | |||
63 | /// | |||
64 | /// This is used when the argument is not an std::string. The specific value | |||
65 | /// is mangled into an intptr_t and the interpretation depends on exactly | |||
66 | /// what sort of argument kind it is. | |||
67 | intptr_t DiagArgumentsVal[MaxArguments]; | |||
68 | ||||
69 | /// \brief The values for the various substitution positions that have | |||
70 | /// string arguments. | |||
71 | std::string DiagArgumentsStr[MaxArguments]; | |||
72 | ||||
73 | /// \brief The list of ranges added to this diagnostic. | |||
74 | SmallVector<CharSourceRange, 8> DiagRanges; | |||
75 | ||||
76 | /// \brief If valid, provides a hint with some code to insert, remove, or | |||
77 | /// modify at a particular position. | |||
78 | SmallVector<FixItHint, 6> FixItHints; | |||
79 | ||||
80 | Storage() = default; | |||
81 | }; | |||
82 | ||||
83 | /// \brief An allocator for Storage objects, which uses a small cache to | |||
84 | /// objects, used to reduce malloc()/free() traffic for partial diagnostics. | |||
85 | class StorageAllocator { | |||
86 | static const unsigned NumCached = 16; | |||
87 | Storage Cached[NumCached]; | |||
88 | Storage *FreeList[NumCached]; | |||
89 | unsigned NumFreeListEntries; | |||
90 | ||||
91 | public: | |||
92 | StorageAllocator(); | |||
93 | ~StorageAllocator(); | |||
94 | ||||
95 | /// \brief Allocate new storage. | |||
96 | Storage *Allocate() { | |||
97 | if (NumFreeListEntries == 0) | |||
98 | return new Storage; | |||
99 | ||||
100 | Storage *Result = FreeList[--NumFreeListEntries]; | |||
101 | Result->NumDiagArgs = 0; | |||
102 | Result->DiagRanges.clear(); | |||
103 | Result->FixItHints.clear(); | |||
104 | return Result; | |||
105 | } | |||
106 | ||||
107 | /// \brief Free the given storage object. | |||
108 | void Deallocate(Storage *S) { | |||
109 | if (S >= Cached && S <= Cached + NumCached) { | |||
110 | FreeList[NumFreeListEntries++] = S; | |||
111 | return; | |||
112 | } | |||
113 | ||||
114 | delete S; | |||
115 | } | |||
116 | }; | |||
117 | ||||
118 | private: | |||
119 | // NOTE: Sema assumes that PartialDiagnostic is location-invariant | |||
120 | // in the sense that its bits can be safely memcpy'ed and destructed | |||
121 | // in the new location. | |||
122 | ||||
123 | /// \brief The diagnostic ID. | |||
124 | mutable unsigned DiagID = 0; | |||
125 | ||||
126 | /// \brief Storage for args and ranges. | |||
127 | mutable Storage *DiagStorage = nullptr; | |||
128 | ||||
129 | /// \brief Allocator used to allocate storage for this diagnostic. | |||
130 | StorageAllocator *Allocator = nullptr; | |||
131 | ||||
132 | /// \brief Retrieve storage for this particular diagnostic. | |||
133 | Storage *getStorage() const { | |||
134 | if (DiagStorage) | |||
135 | return DiagStorage; | |||
136 | ||||
137 | if (Allocator) | |||
138 | DiagStorage = Allocator->Allocate(); | |||
139 | else { | |||
140 | assert(Allocator != reinterpret_cast<StorageAllocator *>(~uintptr_t(0)))(static_cast <bool> (Allocator != reinterpret_cast<StorageAllocator *>(~uintptr_t(0))) ? void (0) : __assert_fail ("Allocator != reinterpret_cast<StorageAllocator *>(~uintptr_t(0))" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/Basic/PartialDiagnostic.h" , 140, __extension__ __PRETTY_FUNCTION__)); | |||
141 | DiagStorage = new Storage; | |||
142 | } | |||
143 | return DiagStorage; | |||
144 | } | |||
145 | ||||
146 | void freeStorage() { | |||
147 | if (!DiagStorage) | |||
148 | return; | |||
149 | ||||
150 | // The hot path for PartialDiagnostic is when we just used it to wrap an ID | |||
151 | // (typically so we have the flexibility of passing a more complex | |||
152 | // diagnostic into the callee, but that does not commonly occur). | |||
153 | // | |||
154 | // Split this out into a slow function for silly compilers (*cough*) which | |||
155 | // can't do decent partial inlining. | |||
156 | freeStorageSlow(); | |||
157 | } | |||
158 | ||||
159 | void freeStorageSlow() { | |||
160 | if (Allocator) | |||
161 | Allocator->Deallocate(DiagStorage); | |||
162 | else if (Allocator != reinterpret_cast<StorageAllocator *>(~uintptr_t(0))) | |||
163 | delete DiagStorage; | |||
164 | DiagStorage = nullptr; | |||
165 | } | |||
166 | ||||
167 | void AddSourceRange(const CharSourceRange &R) const { | |||
168 | if (!DiagStorage) | |||
169 | DiagStorage = getStorage(); | |||
170 | ||||
171 | DiagStorage->DiagRanges.push_back(R); | |||
172 | } | |||
173 | ||||
174 | void AddFixItHint(const FixItHint &Hint) const { | |||
175 | if (Hint.isNull()) | |||
176 | return; | |||
177 | ||||
178 | if (!DiagStorage) | |||
179 | DiagStorage = getStorage(); | |||
180 | ||||
181 | DiagStorage->FixItHints.push_back(Hint); | |||
182 | } | |||
183 | ||||
184 | public: | |||
185 | struct NullDiagnostic {}; | |||
186 | ||||
187 | /// \brief Create a null partial diagnostic, which cannot carry a payload, | |||
188 | /// and only exists to be swapped with a real partial diagnostic. | |||
189 | PartialDiagnostic(NullDiagnostic) {} | |||
190 | ||||
191 | PartialDiagnostic(unsigned DiagID, StorageAllocator &Allocator) | |||
192 | : DiagID(DiagID), Allocator(&Allocator) {} | |||
193 | ||||
194 | PartialDiagnostic(const PartialDiagnostic &Other) | |||
195 | : DiagID(Other.DiagID), Allocator(Other.Allocator) { | |||
196 | if (Other.DiagStorage) { | |||
197 | DiagStorage = getStorage(); | |||
198 | *DiagStorage = *Other.DiagStorage; | |||
199 | } | |||
200 | } | |||
201 | ||||
202 | PartialDiagnostic(PartialDiagnostic &&Other) | |||
203 | : DiagID(Other.DiagID), DiagStorage(Other.DiagStorage), | |||
204 | Allocator(Other.Allocator) { | |||
| ||||
205 | Other.DiagStorage = nullptr; | |||
206 | } | |||
207 | ||||
208 | PartialDiagnostic(const PartialDiagnostic &Other, Storage *DiagStorage) | |||
209 | : DiagID(Other.DiagID), DiagStorage(DiagStorage), | |||
210 | Allocator(reinterpret_cast<StorageAllocator *>(~uintptr_t(0))) { | |||
211 | if (Other.DiagStorage) | |||
212 | *this->DiagStorage = *Other.DiagStorage; | |||
213 | } | |||
214 | ||||
215 | PartialDiagnostic(const Diagnostic &Other, StorageAllocator &Allocator) | |||
216 | : DiagID(Other.getID()), Allocator(&Allocator) { | |||
217 | // Copy arguments. | |||
218 | for (unsigned I = 0, N = Other.getNumArgs(); I != N; ++I) { | |||
219 | if (Other.getArgKind(I) == DiagnosticsEngine::ak_std_string) | |||
220 | AddString(Other.getArgStdStr(I)); | |||
221 | else | |||
222 | AddTaggedVal(Other.getRawArg(I), Other.getArgKind(I)); | |||
223 | } | |||
224 | ||||
225 | // Copy source ranges. | |||
226 | for (unsigned I = 0, N = Other.getNumRanges(); I != N; ++I) | |||
227 | AddSourceRange(Other.getRange(I)); | |||
228 | ||||
229 | // Copy fix-its. | |||
230 | for (unsigned I = 0, N = Other.getNumFixItHints(); I != N; ++I) | |||
231 | AddFixItHint(Other.getFixItHint(I)); | |||
232 | } | |||
233 | ||||
234 | PartialDiagnostic &operator=(const PartialDiagnostic &Other) { | |||
235 | DiagID = Other.DiagID; | |||
236 | if (Other.DiagStorage) { | |||
237 | if (!DiagStorage) | |||
238 | DiagStorage = getStorage(); | |||
239 | ||||
240 | *DiagStorage = *Other.DiagStorage; | |||
241 | } else { | |||
242 | freeStorage(); | |||
243 | } | |||
244 | ||||
245 | return *this; | |||
246 | } | |||
247 | ||||
248 | PartialDiagnostic &operator=(PartialDiagnostic &&Other) { | |||
249 | freeStorage(); | |||
250 | ||||
251 | DiagID = Other.DiagID; | |||
252 | DiagStorage = Other.DiagStorage; | |||
253 | Allocator = Other.Allocator; | |||
254 | ||||
255 | Other.DiagStorage = nullptr; | |||
256 | return *this; | |||
257 | } | |||
258 | ||||
259 | ~PartialDiagnostic() { | |||
260 | freeStorage(); | |||
261 | } | |||
262 | ||||
263 | void swap(PartialDiagnostic &PD) { | |||
264 | std::swap(DiagID, PD.DiagID); | |||
265 | std::swap(DiagStorage, PD.DiagStorage); | |||
266 | std::swap(Allocator, PD.Allocator); | |||
267 | } | |||
268 | ||||
269 | unsigned getDiagID() const { return DiagID; } | |||
270 | ||||
271 | void AddTaggedVal(intptr_t V, DiagnosticsEngine::ArgumentKind Kind) const { | |||
272 | if (!DiagStorage) | |||
273 | DiagStorage = getStorage(); | |||
274 | ||||
275 | assert(DiagStorage->NumDiagArgs < Storage::MaxArguments &&(static_cast <bool> (DiagStorage->NumDiagArgs < Storage ::MaxArguments && "Too many arguments to diagnostic!" ) ? void (0) : __assert_fail ("DiagStorage->NumDiagArgs < Storage::MaxArguments && \"Too many arguments to diagnostic!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/Basic/PartialDiagnostic.h" , 276, __extension__ __PRETTY_FUNCTION__)) | |||
276 | "Too many arguments to diagnostic!")(static_cast <bool> (DiagStorage->NumDiagArgs < Storage ::MaxArguments && "Too many arguments to diagnostic!" ) ? void (0) : __assert_fail ("DiagStorage->NumDiagArgs < Storage::MaxArguments && \"Too many arguments to diagnostic!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/Basic/PartialDiagnostic.h" , 276, __extension__ __PRETTY_FUNCTION__)); | |||
277 | DiagStorage->DiagArgumentsKind[DiagStorage->NumDiagArgs] = Kind; | |||
278 | DiagStorage->DiagArgumentsVal[DiagStorage->NumDiagArgs++] = V; | |||
279 | } | |||
280 | ||||
281 | void AddString(StringRef V) const { | |||
282 | if (!DiagStorage) | |||
283 | DiagStorage = getStorage(); | |||
284 | ||||
285 | assert(DiagStorage->NumDiagArgs < Storage::MaxArguments &&(static_cast <bool> (DiagStorage->NumDiagArgs < Storage ::MaxArguments && "Too many arguments to diagnostic!" ) ? void (0) : __assert_fail ("DiagStorage->NumDiagArgs < Storage::MaxArguments && \"Too many arguments to diagnostic!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/Basic/PartialDiagnostic.h" , 286, __extension__ __PRETTY_FUNCTION__)) | |||
286 | "Too many arguments to diagnostic!")(static_cast <bool> (DiagStorage->NumDiagArgs < Storage ::MaxArguments && "Too many arguments to diagnostic!" ) ? void (0) : __assert_fail ("DiagStorage->NumDiagArgs < Storage::MaxArguments && \"Too many arguments to diagnostic!\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/Basic/PartialDiagnostic.h" , 286, __extension__ __PRETTY_FUNCTION__)); | |||
287 | DiagStorage->DiagArgumentsKind[DiagStorage->NumDiagArgs] | |||
288 | = DiagnosticsEngine::ak_std_string; | |||
289 | DiagStorage->DiagArgumentsStr[DiagStorage->NumDiagArgs++] = V; | |||
290 | } | |||
291 | ||||
292 | void Emit(const DiagnosticBuilder &DB) const { | |||
293 | if (!DiagStorage) | |||
294 | return; | |||
295 | ||||
296 | // Add all arguments. | |||
297 | for (unsigned i = 0, e = DiagStorage->NumDiagArgs; i != e; ++i) { | |||
298 | if ((DiagnosticsEngine::ArgumentKind)DiagStorage->DiagArgumentsKind[i] | |||
299 | == DiagnosticsEngine::ak_std_string) | |||
300 | DB.AddString(DiagStorage->DiagArgumentsStr[i]); | |||
301 | else | |||
302 | DB.AddTaggedVal(DiagStorage->DiagArgumentsVal[i], | |||
303 | (DiagnosticsEngine::ArgumentKind)DiagStorage->DiagArgumentsKind[i]); | |||
304 | } | |||
305 | ||||
306 | // Add all ranges. | |||
307 | for (const CharSourceRange &Range : DiagStorage->DiagRanges) | |||
308 | DB.AddSourceRange(Range); | |||
309 | ||||
310 | // Add all fix-its. | |||
311 | for (const FixItHint &Fix : DiagStorage->FixItHints) | |||
312 | DB.AddFixItHint(Fix); | |||
313 | } | |||
314 | ||||
315 | void EmitToString(DiagnosticsEngine &Diags, | |||
316 | SmallVectorImpl<char> &Buf) const { | |||
317 | // FIXME: It should be possible to render a diagnostic to a string without | |||
318 | // messing with the state of the diagnostics engine. | |||
319 | DiagnosticBuilder DB(Diags.Report(getDiagID())); | |||
320 | Emit(DB); | |||
321 | DB.FlushCounts(); | |||
322 | Diagnostic(&Diags).FormatDiagnostic(Buf); | |||
323 | DB.Clear(); | |||
324 | Diags.Clear(); | |||
325 | } | |||
326 | ||||
327 | /// \brief Clear out this partial diagnostic, giving it a new diagnostic ID | |||
328 | /// and removing all of its arguments, ranges, and fix-it hints. | |||
329 | void Reset(unsigned DiagID = 0) { | |||
330 | this->DiagID = DiagID; | |||
331 | freeStorage(); | |||
332 | } | |||
333 | ||||
334 | bool hasStorage() const { return DiagStorage != nullptr; } | |||
335 | ||||
336 | /// Retrieve the string argument at the given index. | |||
337 | StringRef getStringArg(unsigned I) { | |||
338 | assert(DiagStorage && "No diagnostic storage?")(static_cast <bool> (DiagStorage && "No diagnostic storage?" ) ? void (0) : __assert_fail ("DiagStorage && \"No diagnostic storage?\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/Basic/PartialDiagnostic.h" , 338, __extension__ __PRETTY_FUNCTION__)); | |||
339 | assert(I < DiagStorage->NumDiagArgs && "Not enough diagnostic args")(static_cast <bool> (I < DiagStorage->NumDiagArgs && "Not enough diagnostic args") ? void (0) : __assert_fail ("I < DiagStorage->NumDiagArgs && \"Not enough diagnostic args\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/Basic/PartialDiagnostic.h" , 339, __extension__ __PRETTY_FUNCTION__)); | |||
340 | assert(DiagStorage->DiagArgumentsKind[I](static_cast <bool> (DiagStorage->DiagArgumentsKind[ I] == DiagnosticsEngine::ak_std_string && "Not a string arg" ) ? void (0) : __assert_fail ("DiagStorage->DiagArgumentsKind[I] == DiagnosticsEngine::ak_std_string && \"Not a string arg\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/Basic/PartialDiagnostic.h" , 341, __extension__ __PRETTY_FUNCTION__)) | |||
341 | == DiagnosticsEngine::ak_std_string && "Not a string arg")(static_cast <bool> (DiagStorage->DiagArgumentsKind[ I] == DiagnosticsEngine::ak_std_string && "Not a string arg" ) ? void (0) : __assert_fail ("DiagStorage->DiagArgumentsKind[I] == DiagnosticsEngine::ak_std_string && \"Not a string arg\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/Basic/PartialDiagnostic.h" , 341, __extension__ __PRETTY_FUNCTION__)); | |||
342 | return DiagStorage->DiagArgumentsStr[I]; | |||
343 | } | |||
344 | ||||
345 | friend const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, | |||
346 | unsigned I) { | |||
347 | PD.AddTaggedVal(I, DiagnosticsEngine::ak_uint); | |||
348 | return PD; | |||
349 | } | |||
350 | ||||
351 | friend const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, | |||
352 | int I) { | |||
353 | PD.AddTaggedVal(I, DiagnosticsEngine::ak_sint); | |||
354 | return PD; | |||
355 | } | |||
356 | ||||
357 | friend inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, | |||
358 | const char *S) { | |||
359 | PD.AddTaggedVal(reinterpret_cast<intptr_t>(S), | |||
360 | DiagnosticsEngine::ak_c_string); | |||
361 | return PD; | |||
362 | } | |||
363 | ||||
364 | friend inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, | |||
365 | StringRef S) { | |||
366 | ||||
367 | PD.AddString(S); | |||
368 | return PD; | |||
369 | } | |||
370 | ||||
371 | friend inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, | |||
372 | const IdentifierInfo *II) { | |||
373 | PD.AddTaggedVal(reinterpret_cast<intptr_t>(II), | |||
374 | DiagnosticsEngine::ak_identifierinfo); | |||
375 | return PD; | |||
376 | } | |||
377 | ||||
378 | // Adds a DeclContext to the diagnostic. The enable_if template magic is here | |||
379 | // so that we only match those arguments that are (statically) DeclContexts; | |||
380 | // other arguments that derive from DeclContext (e.g., RecordDecls) will not | |||
381 | // match. | |||
382 | template<typename T> | |||
383 | friend inline | |||
384 | typename std::enable_if<std::is_same<T, DeclContext>::value, | |||
385 | const PartialDiagnostic &>::type | |||
386 | operator<<(const PartialDiagnostic &PD, T *DC) { | |||
387 | PD.AddTaggedVal(reinterpret_cast<intptr_t>(DC), | |||
388 | DiagnosticsEngine::ak_declcontext); | |||
389 | return PD; | |||
390 | } | |||
391 | ||||
392 | friend inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, | |||
393 | SourceRange R) { | |||
394 | PD.AddSourceRange(CharSourceRange::getTokenRange(R)); | |||
395 | return PD; | |||
396 | } | |||
397 | ||||
398 | friend inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, | |||
399 | const CharSourceRange &R) { | |||
400 | PD.AddSourceRange(R); | |||
401 | return PD; | |||
402 | } | |||
403 | ||||
404 | friend const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, | |||
405 | const FixItHint &Hint) { | |||
406 | PD.AddFixItHint(Hint); | |||
407 | return PD; | |||
408 | } | |||
409 | }; | |||
410 | ||||
411 | inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, | |||
412 | const PartialDiagnostic &PD) { | |||
413 | PD.Emit(DB); | |||
414 | return DB; | |||
415 | } | |||
416 | ||||
417 | /// \brief A partial diagnostic along with the source location where this | |||
418 | /// diagnostic occurs. | |||
419 | using PartialDiagnosticAt = std::pair<SourceLocation, PartialDiagnostic>; | |||
420 | ||||
421 | } // namespace clang | |||
422 | ||||
423 | #endif // LLVM_CLANG_BASIC_PARTIALDIAGNOSTIC_H |
1 | //===--- SemaInternal.h - Internal Sema Interfaces --------------*- C++ -*-===// |
2 | // |
3 | // The LLVM Compiler Infrastructure |
4 | // |
5 | // This file is distributed under the University of Illinois Open Source |
6 | // License. See LICENSE.TXT for details. |
7 | // |
8 | //===----------------------------------------------------------------------===// |
9 | // |
10 | // This file provides common API and #includes for the internal |
11 | // implementation of Sema. |
12 | // |
13 | //===----------------------------------------------------------------------===// |
14 | |
15 | #ifndef LLVM_CLANG_SEMA_SEMAINTERNAL_H |
16 | #define LLVM_CLANG_SEMA_SEMAINTERNAL_H |
17 | |
18 | #include "clang/AST/ASTContext.h" |
19 | #include "clang/Sema/Lookup.h" |
20 | #include "clang/Sema/Sema.h" |
21 | #include "clang/Sema/SemaDiagnostic.h" |
22 | |
23 | namespace clang { |
24 | |
25 | inline PartialDiagnostic Sema::PDiag(unsigned DiagID) { |
26 | return PartialDiagnostic(DiagID, Context.getDiagAllocator()); |
27 | } |
28 | |
29 | inline bool |
30 | FTIHasSingleVoidParameter(const DeclaratorChunk::FunctionTypeInfo &FTI) { |
31 | return FTI.NumParams == 1 && !FTI.isVariadic && |
32 | FTI.Params[0].Ident == nullptr && FTI.Params[0].Param && |
33 | cast<ParmVarDecl>(FTI.Params[0].Param)->getType()->isVoidType(); |
34 | } |
35 | |
36 | inline bool |
37 | FTIHasNonVoidParameters(const DeclaratorChunk::FunctionTypeInfo &FTI) { |
38 | // Assume FTI is well-formed. |
39 | return FTI.NumParams && !FTIHasSingleVoidParameter(FTI); |
40 | } |
41 | |
42 | // This requires the variable to be non-dependent and the initializer |
43 | // to not be value dependent. |
44 | inline bool IsVariableAConstantExpression(VarDecl *Var, ASTContext &Context) { |
45 | const VarDecl *DefVD = nullptr; |
46 | return !isa<ParmVarDecl>(Var) && |
47 | Var->isUsableInConstantExpressions(Context) && |
48 | Var->getAnyInitializer(DefVD) && DefVD->checkInitIsICE(); |
49 | } |
50 | |
51 | // Helper function to check whether D's attributes match current CUDA mode. |
52 | // Decls with mismatched attributes and related diagnostics may have to be |
53 | // ignored during this CUDA compilation pass. |
54 | inline bool DeclAttrsMatchCUDAMode(const LangOptions &LangOpts, Decl *D) { |
55 | if (!LangOpts.CUDA || !D) |
56 | return true; |
57 | bool isDeviceSideDecl = D->hasAttr<CUDADeviceAttr>() || |
58 | D->hasAttr<CUDASharedAttr>() || |
59 | D->hasAttr<CUDAGlobalAttr>(); |
60 | return isDeviceSideDecl == LangOpts.CUDAIsDevice; |
61 | } |
62 | |
63 | // Directly mark a variable odr-used. Given a choice, prefer to use |
64 | // MarkVariableReferenced since it does additional checks and then |
65 | // calls MarkVarDeclODRUsed. |
66 | // If the variable must be captured: |
67 | // - if FunctionScopeIndexToStopAt is null, capture it in the CurContext |
68 | // - else capture it in the DeclContext that maps to the |
69 | // *FunctionScopeIndexToStopAt on the FunctionScopeInfo stack. |
70 | inline void MarkVarDeclODRUsed(VarDecl *Var, |
71 | SourceLocation Loc, Sema &SemaRef, |
72 | const unsigned *const FunctionScopeIndexToStopAt) { |
73 | // Keep track of used but undefined variables. |
74 | // FIXME: We shouldn't suppress this warning for static data members. |
75 | if (Var->hasDefinition(SemaRef.Context) == VarDecl::DeclarationOnly && |
76 | (!Var->isExternallyVisible() || Var->isInline() || |
77 | SemaRef.isExternalWithNoLinkageType(Var)) && |
78 | !(Var->isStaticDataMember() && Var->hasInit())) { |
79 | SourceLocation &old = SemaRef.UndefinedButUsed[Var->getCanonicalDecl()]; |
80 | if (old.isInvalid()) |
81 | old = Loc; |
82 | } |
83 | QualType CaptureType, DeclRefType; |
84 | SemaRef.tryCaptureVariable(Var, Loc, Sema::TryCapture_Implicit, |
85 | /*EllipsisLoc*/ SourceLocation(), |
86 | /*BuildAndDiagnose*/ true, |
87 | CaptureType, DeclRefType, |
88 | FunctionScopeIndexToStopAt); |
89 | |
90 | Var->markUsed(SemaRef.Context); |
91 | } |
92 | |
93 | /// Return a DLL attribute from the declaration. |
94 | inline InheritableAttr *getDLLAttr(Decl *D) { |
95 | assert(!(D->hasAttr<DLLImportAttr>() && D->hasAttr<DLLExportAttr>()) &&(static_cast <bool> (!(D->hasAttr<DLLImportAttr> () && D->hasAttr<DLLExportAttr>()) && "A declaration cannot be both dllimport and dllexport.") ? void (0) : __assert_fail ("!(D->hasAttr<DLLImportAttr>() && D->hasAttr<DLLExportAttr>()) && \"A declaration cannot be both dllimport and dllexport.\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/Sema/SemaInternal.h" , 96, __extension__ __PRETTY_FUNCTION__)) |
96 | "A declaration cannot be both dllimport and dllexport.")(static_cast <bool> (!(D->hasAttr<DLLImportAttr> () && D->hasAttr<DLLExportAttr>()) && "A declaration cannot be both dllimport and dllexport.") ? void (0) : __assert_fail ("!(D->hasAttr<DLLImportAttr>() && D->hasAttr<DLLExportAttr>()) && \"A declaration cannot be both dllimport and dllexport.\"" , "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/Sema/SemaInternal.h" , 96, __extension__ __PRETTY_FUNCTION__)); |
97 | if (auto *Import = D->getAttr<DLLImportAttr>()) |
98 | return Import; |
99 | if (auto *Export = D->getAttr<DLLExportAttr>()) |
100 | return Export; |
101 | return nullptr; |
102 | } |
103 | |
104 | class TypoCorrectionConsumer : public VisibleDeclConsumer { |
105 | typedef SmallVector<TypoCorrection, 1> TypoResultList; |
106 | typedef llvm::StringMap<TypoResultList> TypoResultsMap; |
107 | typedef std::map<unsigned, TypoResultsMap> TypoEditDistanceMap; |
108 | |
109 | public: |
110 | TypoCorrectionConsumer(Sema &SemaRef, |
111 | const DeclarationNameInfo &TypoName, |
112 | Sema::LookupNameKind LookupKind, |
113 | Scope *S, CXXScopeSpec *SS, |
114 | std::unique_ptr<CorrectionCandidateCallback> CCC, |
115 | DeclContext *MemberContext, |
116 | bool EnteringContext) |
117 | : Typo(TypoName.getName().getAsIdentifierInfo()), CurrentTCIndex(0), |
118 | SavedTCIndex(0), SemaRef(SemaRef), S(S), |
119 | SS(SS ? llvm::make_unique<CXXScopeSpec>(*SS) : nullptr), |
120 | CorrectionValidator(std::move(CCC)), MemberContext(MemberContext), |
121 | Result(SemaRef, TypoName, LookupKind), |
122 | Namespaces(SemaRef.Context, SemaRef.CurContext, SS), |
123 | EnteringContext(EnteringContext), SearchNamespaces(false) { |
124 | Result.suppressDiagnostics(); |
125 | // Arrange for ValidatedCorrections[0] to always be an empty correction. |
126 | ValidatedCorrections.push_back(TypoCorrection()); |
127 | } |
128 | |
129 | bool includeHiddenDecls() const override { return true; } |
130 | |
131 | // Methods for adding potential corrections to the consumer. |
132 | void FoundDecl(NamedDecl *ND, NamedDecl *Hiding, DeclContext *Ctx, |
133 | bool InBaseClass) override; |
134 | void FoundName(StringRef Name); |
135 | void addKeywordResult(StringRef Keyword); |
136 | void addCorrection(TypoCorrection Correction); |
137 | |
138 | bool empty() const { |
139 | return CorrectionResults.empty() && ValidatedCorrections.size() == 1; |
140 | } |
141 | |
142 | /// \brief Return the list of TypoCorrections for the given identifier from |
143 | /// the set of corrections that have the closest edit distance, if any. |
144 | TypoResultList &operator[](StringRef Name) { |
145 | return CorrectionResults.begin()->second[Name]; |
146 | } |
147 | |
148 | /// \brief Return the edit distance of the corrections that have the |
149 | /// closest/best edit distance from the original typop. |
150 | unsigned getBestEditDistance(bool Normalized) { |
151 | if (CorrectionResults.empty()) |
152 | return (std::numeric_limits<unsigned>::max)(); |
153 | |
154 | unsigned BestED = CorrectionResults.begin()->first; |
155 | return Normalized ? TypoCorrection::NormalizeEditDistance(BestED) : BestED; |
156 | } |
157 | |
158 | /// \brief Set-up method to add to the consumer the set of namespaces to use |
159 | /// in performing corrections to nested name specifiers. This method also |
160 | /// implicitly adds all of the known classes in the current AST context to the |
161 | /// to the consumer for correcting nested name specifiers. |
162 | void |
163 | addNamespaces(const llvm::MapVector<NamespaceDecl *, bool> &KnownNamespaces); |
164 | |
165 | /// \brief Return the next typo correction that passes all internal filters |
166 | /// and is deemed valid by the consumer's CorrectionCandidateCallback, |
167 | /// starting with the corrections that have the closest edit distance. An |
168 | /// empty TypoCorrection is returned once no more viable corrections remain |
169 | /// in the consumer. |
170 | const TypoCorrection &getNextCorrection(); |
171 | |
172 | /// \brief Get the last correction returned by getNextCorrection(). |
173 | const TypoCorrection &getCurrentCorrection() { |
174 | return CurrentTCIndex < ValidatedCorrections.size() |
175 | ? ValidatedCorrections[CurrentTCIndex] |
176 | : ValidatedCorrections[0]; // The empty correction. |
177 | } |
178 | |
179 | /// \brief Return the next typo correction like getNextCorrection, but keep |
180 | /// the internal state pointed to the current correction (i.e. the next time |
181 | /// getNextCorrection is called, it will return the same correction returned |
182 | /// by peekNextcorrection). |
183 | const TypoCorrection &peekNextCorrection() { |
184 | auto Current = CurrentTCIndex; |
185 | const TypoCorrection &TC = getNextCorrection(); |
186 | CurrentTCIndex = Current; |
187 | return TC; |
188 | } |
189 | |
190 | /// \brief Reset the consumer's position in the stream of viable corrections |
191 | /// (i.e. getNextCorrection() will return each of the previously returned |
192 | /// corrections in order before returning any new corrections). |
193 | void resetCorrectionStream() { |
194 | CurrentTCIndex = 0; |
195 | } |
196 | |
197 | /// \brief Return whether the end of the stream of corrections has been |
198 | /// reached. |
199 | bool finished() { |
200 | return CorrectionResults.empty() && |
201 | CurrentTCIndex >= ValidatedCorrections.size(); |
202 | } |
203 | |
204 | /// \brief Save the current position in the correction stream (overwriting any |
205 | /// previously saved position). |
206 | void saveCurrentPosition() { |
207 | SavedTCIndex = CurrentTCIndex; |
208 | } |
209 | |
210 | /// \brief Restore the saved position in the correction stream. |
211 | void restoreSavedPosition() { |
212 | CurrentTCIndex = SavedTCIndex; |
213 | } |
214 | |
215 | ASTContext &getContext() const { return SemaRef.Context; } |
216 | const LookupResult &getLookupResult() const { return Result; } |
217 | |
218 | bool isAddressOfOperand() const { return CorrectionValidator->IsAddressOfOperand; } |
219 | const CXXScopeSpec *getSS() const { return SS.get(); } |
220 | Scope *getScope() const { return S; } |
221 | CorrectionCandidateCallback *getCorrectionValidator() const { |
222 | return CorrectionValidator.get(); |
223 | } |
224 | |
225 | private: |
226 | class NamespaceSpecifierSet { |
227 | struct SpecifierInfo { |
228 | DeclContext* DeclCtx; |
229 | NestedNameSpecifier* NameSpecifier; |
230 | unsigned EditDistance; |
231 | }; |
232 | |
233 | typedef SmallVector<DeclContext*, 4> DeclContextList; |
234 | typedef SmallVector<SpecifierInfo, 16> SpecifierInfoList; |
235 | |
236 | ASTContext &Context; |
237 | DeclContextList CurContextChain; |
238 | std::string CurNameSpecifier; |
239 | SmallVector<const IdentifierInfo*, 4> CurContextIdentifiers; |
240 | SmallVector<const IdentifierInfo*, 4> CurNameSpecifierIdentifiers; |
241 | |
242 | std::map<unsigned, SpecifierInfoList> DistanceMap; |
243 | |
244 | /// \brief Helper for building the list of DeclContexts between the current |
245 | /// context and the top of the translation unit |
246 | static DeclContextList buildContextChain(DeclContext *Start); |
247 | |
248 | unsigned buildNestedNameSpecifier(DeclContextList &DeclChain, |
249 | NestedNameSpecifier *&NNS); |
250 | |
251 | public: |
252 | NamespaceSpecifierSet(ASTContext &Context, DeclContext *CurContext, |
253 | CXXScopeSpec *CurScopeSpec); |
254 | |
255 | /// \brief Add the DeclContext (a namespace or record) to the set, computing |
256 | /// the corresponding NestedNameSpecifier and its distance in the process. |
257 | void addNameSpecifier(DeclContext *Ctx); |
258 | |
259 | /// \brief Provides flat iteration over specifiers, sorted by distance. |
260 | class iterator |
261 | : public llvm::iterator_facade_base<iterator, std::forward_iterator_tag, |
262 | SpecifierInfo> { |
263 | /// Always points to the last element in the distance map. |
264 | const std::map<unsigned, SpecifierInfoList>::iterator OuterBack; |
265 | /// Iterator on the distance map. |
266 | std::map<unsigned, SpecifierInfoList>::iterator Outer; |
267 | /// Iterator on an element in the distance map. |
268 | SpecifierInfoList::iterator Inner; |
269 | |
270 | public: |
271 | iterator(NamespaceSpecifierSet &Set, bool IsAtEnd) |
272 | : OuterBack(std::prev(Set.DistanceMap.end())), |
273 | Outer(Set.DistanceMap.begin()), |
274 | Inner(!IsAtEnd ? Outer->second.begin() : OuterBack->second.end()) { |
275 | assert(!Set.DistanceMap.empty())(static_cast <bool> (!Set.DistanceMap.empty()) ? void ( 0) : __assert_fail ("!Set.DistanceMap.empty()", "/build/llvm-toolchain-snapshot-7~svn329677/tools/clang/include/clang/Sema/SemaInternal.h" , 275, __extension__ __PRETTY_FUNCTION__)); |
276 | } |
277 | |
278 | iterator &operator++() { |
279 | ++Inner; |
280 | if (Inner == Outer->second.end() && Outer != OuterBack) { |
281 | ++Outer; |
282 | Inner = Outer->second.begin(); |
283 | } |
284 | return *this; |
285 | } |
286 | |
287 | SpecifierInfo &operator*() { return *Inner; } |
288 | bool operator==(const iterator &RHS) const { return Inner == RHS.Inner; } |
289 | }; |
290 | |
291 | iterator begin() { return iterator(*this, /*IsAtEnd=*/false); } |
292 | iterator end() { return iterator(*this, /*IsAtEnd=*/true); } |
293 | }; |
294 | |
295 | void addName(StringRef Name, NamedDecl *ND, |
296 | NestedNameSpecifier *NNS = nullptr, bool isKeyword = false); |
297 | |
298 | /// \brief Find any visible decls for the given typo correction candidate. |
299 | /// If none are found, it to the set of candidates for which qualified lookups |
300 | /// will be performed to find possible nested name specifier changes. |
301 | bool resolveCorrection(TypoCorrection &Candidate); |
302 | |
303 | /// \brief Perform qualified lookups on the queued set of typo correction |
304 | /// candidates and add the nested name specifier changes to each candidate if |
305 | /// a lookup succeeds (at which point the candidate will be returned to the |
306 | /// main pool of potential corrections). |
307 | void performQualifiedLookups(); |
308 | |
309 | /// \brief The name written that is a typo in the source. |
310 | IdentifierInfo *Typo; |
311 | |
312 | /// \brief The results found that have the smallest edit distance |
313 | /// found (so far) with the typo name. |
314 | /// |
315 | /// The pointer value being set to the current DeclContext indicates |
316 | /// whether there is a keyword with this name. |
317 | TypoEditDistanceMap CorrectionResults; |
318 | |
319 | SmallVector<TypoCorrection, 4> ValidatedCorrections; |
320 | size_t CurrentTCIndex; |
321 | size_t SavedTCIndex; |
322 | |
323 | Sema &SemaRef; |
324 | Scope *S; |
325 | std::unique_ptr<CXXScopeSpec> SS; |
326 | std::unique_ptr<CorrectionCandidateCallback> CorrectionValidator; |
327 | DeclContext *MemberContext; |
328 | LookupResult Result; |
329 | NamespaceSpecifierSet Namespaces; |
330 | SmallVector<TypoCorrection, 2> QualifiedResults; |
331 | bool EnteringContext; |
332 | bool SearchNamespaces; |
333 | }; |
334 | |
335 | inline Sema::TypoExprState::TypoExprState() {} |
336 | |
337 | inline Sema::TypoExprState::TypoExprState(TypoExprState &&other) noexcept { |
338 | *this = std::move(other); |
339 | } |
340 | |
341 | inline Sema::TypoExprState &Sema::TypoExprState:: |
342 | operator=(Sema::TypoExprState &&other) noexcept { |
343 | Consumer = std::move(other.Consumer); |
344 | DiagHandler = std::move(other.DiagHandler); |
345 | RecoveryHandler = std::move(other.RecoveryHandler); |
346 | return *this; |
347 | } |
348 | |
349 | } // end namespace clang |
350 | |
351 | #endif |