Bug Summary

File:clang/lib/Sema/TreeTransform.h
Warning:line 5369, column 24
Forming reference to null pointer

Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name SemaTemplateInstantiate.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mthread-model posix -mframe-pointer=none -relaxed-aliasing -fmath-errno -fno-rounding-math -masm-verbose -mconstructor-aliases -munwind-tables -target-cpu x86-64 -dwarf-column-info -fno-split-dwarf-inlining -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-11/lib/clang/11.0.0 -D CLANG_VENDOR="Debian " -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/build-llvm/tools/clang/lib/Sema -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/build-llvm/include -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-11/lib/clang/11.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/build-llvm/tools/clang/lib/Sema -fdebug-prefix-map=/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347=. -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -o /tmp/scan-build-2020-03-09-184146-41876-1 -x c++ /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp

/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp

1//===------- SemaTemplateInstantiate.cpp - C++ Template Instantiation ------===/
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//===----------------------------------------------------------------------===/
7//
8// This file implements C++ template instantiation.
9//
10//===----------------------------------------------------------------------===/
11
12#include "clang/Sema/SemaInternal.h"
13#include "TreeTransform.h"
14#include "clang/AST/ASTConsumer.h"
15#include "clang/AST/ASTContext.h"
16#include "clang/AST/ASTLambda.h"
17#include "clang/AST/ASTMutationListener.h"
18#include "clang/AST/DeclTemplate.h"
19#include "clang/AST/Expr.h"
20#include "clang/AST/PrettyDeclStackTrace.h"
21#include "clang/AST/TypeVisitor.h"
22#include "clang/Basic/LangOptions.h"
23#include "clang/Basic/Stack.h"
24#include "clang/Sema/DeclSpec.h"
25#include "clang/Sema/Initialization.h"
26#include "clang/Sema/Lookup.h"
27#include "clang/Sema/Template.h"
28#include "clang/Sema/TemplateDeduction.h"
29#include "clang/Sema/TemplateInstCallback.h"
30#include "clang/Sema/SemaConcept.h"
31#include "llvm/Support/TimeProfiler.h"
32
33using namespace clang;
34using namespace sema;
35
36//===----------------------------------------------------------------------===/
37// Template Instantiation Support
38//===----------------------------------------------------------------------===/
39
40/// Retrieve the template argument list(s) that should be used to
41/// instantiate the definition of the given declaration.
42///
43/// \param D the declaration for which we are computing template instantiation
44/// arguments.
45///
46/// \param Innermost if non-NULL, the innermost template argument list.
47///
48/// \param RelativeToPrimary true if we should get the template
49/// arguments relative to the primary template, even when we're
50/// dealing with a specialization. This is only relevant for function
51/// template specializations.
52///
53/// \param Pattern If non-NULL, indicates the pattern from which we will be
54/// instantiating the definition of the given declaration, \p D. This is
55/// used to determine the proper set of template instantiation arguments for
56/// friend function template specializations.
57MultiLevelTemplateArgumentList
58Sema::getTemplateInstantiationArgs(NamedDecl *D,
59 const TemplateArgumentList *Innermost,
60 bool RelativeToPrimary,
61 const FunctionDecl *Pattern) {
62 // Accumulate the set of template argument lists in this structure.
63 MultiLevelTemplateArgumentList Result;
64
65 if (Innermost)
66 Result.addOuterTemplateArguments(Innermost);
67
68 DeclContext *Ctx = dyn_cast<DeclContext>(D);
69 if (!Ctx) {
70 Ctx = D->getDeclContext();
71
72 // Add template arguments from a variable template instantiation. For a
73 // class-scope explicit specialization, there are no template arguments
74 // at this level, but there may be enclosing template arguments.
75 VarTemplateSpecializationDecl *Spec =
76 dyn_cast<VarTemplateSpecializationDecl>(D);
77 if (Spec && !Spec->isClassScopeExplicitSpecialization()) {
78 // We're done when we hit an explicit specialization.
79 if (Spec->getSpecializationKind() == TSK_ExplicitSpecialization &&
80 !isa<VarTemplatePartialSpecializationDecl>(Spec))
81 return Result;
82
83 Result.addOuterTemplateArguments(&Spec->getTemplateInstantiationArgs());
84
85 // If this variable template specialization was instantiated from a
86 // specialized member that is a variable template, we're done.
87 assert(Spec->getSpecializedTemplate() && "No variable template?")((Spec->getSpecializedTemplate() && "No variable template?"
) ? static_cast<void> (0) : __assert_fail ("Spec->getSpecializedTemplate() && \"No variable template?\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 87, __PRETTY_FUNCTION__))
;
88 llvm::PointerUnion<VarTemplateDecl*,
89 VarTemplatePartialSpecializationDecl*> Specialized
90 = Spec->getSpecializedTemplateOrPartial();
91 if (VarTemplatePartialSpecializationDecl *Partial =
92 Specialized.dyn_cast<VarTemplatePartialSpecializationDecl *>()) {
93 if (Partial->isMemberSpecialization())
94 return Result;
95 } else {
96 VarTemplateDecl *Tmpl = Specialized.get<VarTemplateDecl *>();
97 if (Tmpl->isMemberSpecialization())
98 return Result;
99 }
100 }
101
102 // If we have a template template parameter with translation unit context,
103 // then we're performing substitution into a default template argument of
104 // this template template parameter before we've constructed the template
105 // that will own this template template parameter. In this case, we
106 // use empty template parameter lists for all of the outer templates
107 // to avoid performing any substitutions.
108 if (Ctx->isTranslationUnit()) {
109 if (TemplateTemplateParmDecl *TTP
110 = dyn_cast<TemplateTemplateParmDecl>(D)) {
111 for (unsigned I = 0, N = TTP->getDepth() + 1; I != N; ++I)
112 Result.addOuterTemplateArguments(None);
113 return Result;
114 }
115 }
116 }
117
118 while (!Ctx->isFileContext()) {
119 // Add template arguments from a class template instantiation.
120 ClassTemplateSpecializationDecl *Spec
121 = dyn_cast<ClassTemplateSpecializationDecl>(Ctx);
122 if (Spec && !Spec->isClassScopeExplicitSpecialization()) {
123 // We're done when we hit an explicit specialization.
124 if (Spec->getSpecializationKind() == TSK_ExplicitSpecialization &&
125 !isa<ClassTemplatePartialSpecializationDecl>(Spec))
126 break;
127
128 Result.addOuterTemplateArguments(&Spec->getTemplateInstantiationArgs());
129
130 // If this class template specialization was instantiated from a
131 // specialized member that is a class template, we're done.
132 assert(Spec->getSpecializedTemplate() && "No class template?")((Spec->getSpecializedTemplate() && "No class template?"
) ? static_cast<void> (0) : __assert_fail ("Spec->getSpecializedTemplate() && \"No class template?\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 132, __PRETTY_FUNCTION__))
;
133 if (Spec->getSpecializedTemplate()->isMemberSpecialization())
134 break;
135 }
136 // Add template arguments from a function template specialization.
137 else if (FunctionDecl *Function = dyn_cast<FunctionDecl>(Ctx)) {
138 if (!RelativeToPrimary &&
139 Function->getTemplateSpecializationKindForInstantiation() ==
140 TSK_ExplicitSpecialization)
141 break;
142
143 if (const TemplateArgumentList *TemplateArgs
144 = Function->getTemplateSpecializationArgs()) {
145 // Add the template arguments for this specialization.
146 Result.addOuterTemplateArguments(TemplateArgs);
147
148 // If this function was instantiated from a specialized member that is
149 // a function template, we're done.
150 assert(Function->getPrimaryTemplate() && "No function template?")((Function->getPrimaryTemplate() && "No function template?"
) ? static_cast<void> (0) : __assert_fail ("Function->getPrimaryTemplate() && \"No function template?\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 150, __PRETTY_FUNCTION__))
;
151 if (Function->getPrimaryTemplate()->isMemberSpecialization())
152 break;
153
154 // If this function is a generic lambda specialization, we are done.
155 if (isGenericLambdaCallOperatorOrStaticInvokerSpecialization(Function))
156 break;
157
158 } else if (FunctionTemplateDecl *FunTmpl
159 = Function->getDescribedFunctionTemplate()) {
160 // Add the "injected" template arguments.
161 Result.addOuterTemplateArguments(FunTmpl->getInjectedTemplateArgs());
162 }
163
164 // If this is a friend declaration and it declares an entity at
165 // namespace scope, take arguments from its lexical parent
166 // instead of its semantic parent, unless of course the pattern we're
167 // instantiating actually comes from the file's context!
168 if (Function->getFriendObjectKind() &&
169 Function->getDeclContext()->isFileContext() &&
170 (!Pattern || !Pattern->getLexicalDeclContext()->isFileContext())) {
171 Ctx = Function->getLexicalDeclContext();
172 RelativeToPrimary = false;
173 continue;
174 }
175 } else if (CXXRecordDecl *Rec = dyn_cast<CXXRecordDecl>(Ctx)) {
176 if (ClassTemplateDecl *ClassTemplate = Rec->getDescribedClassTemplate()) {
177 QualType T = ClassTemplate->getInjectedClassNameSpecialization();
178 const TemplateSpecializationType *TST =
179 cast<TemplateSpecializationType>(Context.getCanonicalType(T));
180 Result.addOuterTemplateArguments(
181 llvm::makeArrayRef(TST->getArgs(), TST->getNumArgs()));
182 if (ClassTemplate->isMemberSpecialization())
183 break;
184 }
185 }
186
187 Ctx = Ctx->getParent();
188 RelativeToPrimary = false;
189 }
190
191 return Result;
192}
193
194bool Sema::CodeSynthesisContext::isInstantiationRecord() const {
195 switch (Kind) {
196 case TemplateInstantiation:
197 case ExceptionSpecInstantiation:
198 case DefaultTemplateArgumentInstantiation:
199 case DefaultFunctionArgumentInstantiation:
200 case ExplicitTemplateArgumentSubstitution:
201 case DeducedTemplateArgumentSubstitution:
202 case PriorTemplateArgumentSubstitution:
203 case ConstraintsCheck:
204 case NestedRequirementConstraintsCheck:
205 return true;
206
207 case RequirementInstantiation:
208 case DefaultTemplateArgumentChecking:
209 case DeclaringSpecialMember:
210 case DeclaringImplicitEqualityComparison:
211 case DefiningSynthesizedFunction:
212 case ExceptionSpecEvaluation:
213 case ConstraintSubstitution:
214 case ParameterMappingSubstitution:
215 case ConstraintNormalization:
216 case RewritingOperatorAsSpaceship:
217 return false;
218
219 // This function should never be called when Kind's value is Memoization.
220 case Memoization:
221 break;
222 }
223
224 llvm_unreachable("Invalid SynthesisKind!")::llvm::llvm_unreachable_internal("Invalid SynthesisKind!", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 224)
;
225}
226
227Sema::InstantiatingTemplate::InstantiatingTemplate(
228 Sema &SemaRef, CodeSynthesisContext::SynthesisKind Kind,
229 SourceLocation PointOfInstantiation, SourceRange InstantiationRange,
230 Decl *Entity, NamedDecl *Template, ArrayRef<TemplateArgument> TemplateArgs,
231 sema::TemplateDeductionInfo *DeductionInfo)
232 : SemaRef(SemaRef) {
233 // Don't allow further instantiation if a fatal error and an uncompilable
234 // error have occurred. Any diagnostics we might have raised will not be
235 // visible, and we do not need to construct a correct AST.
236 if (SemaRef.Diags.hasFatalErrorOccurred() &&
237 SemaRef.Diags.hasUncompilableErrorOccurred()) {
238 Invalid = true;
239 return;
240 }
241 Invalid = CheckInstantiationDepth(PointOfInstantiation, InstantiationRange);
242 if (!Invalid) {
243 CodeSynthesisContext Inst;
244 Inst.Kind = Kind;
245 Inst.PointOfInstantiation = PointOfInstantiation;
246 Inst.Entity = Entity;
247 Inst.Template = Template;
248 Inst.TemplateArgs = TemplateArgs.data();
249 Inst.NumTemplateArgs = TemplateArgs.size();
250 Inst.DeductionInfo = DeductionInfo;
251 Inst.InstantiationRange = InstantiationRange;
252 SemaRef.pushCodeSynthesisContext(Inst);
253
254 AlreadyInstantiating = !Inst.Entity ? false :
255 !SemaRef.InstantiatingSpecializations
256 .insert(std::make_pair(Inst.Entity->getCanonicalDecl(), Inst.Kind))
257 .second;
258 atTemplateBegin(SemaRef.TemplateInstCallbacks, SemaRef, Inst);
259 }
260}
261
262Sema::InstantiatingTemplate::InstantiatingTemplate(
263 Sema &SemaRef, SourceLocation PointOfInstantiation, Decl *Entity,
264 SourceRange InstantiationRange)
265 : InstantiatingTemplate(SemaRef,
266 CodeSynthesisContext::TemplateInstantiation,
267 PointOfInstantiation, InstantiationRange, Entity) {}
268
269Sema::InstantiatingTemplate::InstantiatingTemplate(
270 Sema &SemaRef, SourceLocation PointOfInstantiation, FunctionDecl *Entity,
271 ExceptionSpecification, SourceRange InstantiationRange)
272 : InstantiatingTemplate(
273 SemaRef, CodeSynthesisContext::ExceptionSpecInstantiation,
274 PointOfInstantiation, InstantiationRange, Entity) {}
275
276Sema::InstantiatingTemplate::InstantiatingTemplate(
277 Sema &SemaRef, SourceLocation PointOfInstantiation, TemplateParameter Param,
278 TemplateDecl *Template, ArrayRef<TemplateArgument> TemplateArgs,
279 SourceRange InstantiationRange)
280 : InstantiatingTemplate(
281 SemaRef,
282 CodeSynthesisContext::DefaultTemplateArgumentInstantiation,
283 PointOfInstantiation, InstantiationRange, getAsNamedDecl(Param),
284 Template, TemplateArgs) {}
285
286Sema::InstantiatingTemplate::InstantiatingTemplate(
287 Sema &SemaRef, SourceLocation PointOfInstantiation,
288 FunctionTemplateDecl *FunctionTemplate,
289 ArrayRef<TemplateArgument> TemplateArgs,
290 CodeSynthesisContext::SynthesisKind Kind,
291 sema::TemplateDeductionInfo &DeductionInfo, SourceRange InstantiationRange)
292 : InstantiatingTemplate(SemaRef, Kind, PointOfInstantiation,
293 InstantiationRange, FunctionTemplate, nullptr,
294 TemplateArgs, &DeductionInfo) {
295 assert(((Kind == CodeSynthesisContext::ExplicitTemplateArgumentSubstitution
|| Kind == CodeSynthesisContext::DeducedTemplateArgumentSubstitution
) ? static_cast<void> (0) : __assert_fail ("Kind == CodeSynthesisContext::ExplicitTemplateArgumentSubstitution || Kind == CodeSynthesisContext::DeducedTemplateArgumentSubstitution"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 297, __PRETTY_FUNCTION__))
296 Kind == CodeSynthesisContext::ExplicitTemplateArgumentSubstitution ||((Kind == CodeSynthesisContext::ExplicitTemplateArgumentSubstitution
|| Kind == CodeSynthesisContext::DeducedTemplateArgumentSubstitution
) ? static_cast<void> (0) : __assert_fail ("Kind == CodeSynthesisContext::ExplicitTemplateArgumentSubstitution || Kind == CodeSynthesisContext::DeducedTemplateArgumentSubstitution"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 297, __PRETTY_FUNCTION__))
297 Kind == CodeSynthesisContext::DeducedTemplateArgumentSubstitution)((Kind == CodeSynthesisContext::ExplicitTemplateArgumentSubstitution
|| Kind == CodeSynthesisContext::DeducedTemplateArgumentSubstitution
) ? static_cast<void> (0) : __assert_fail ("Kind == CodeSynthesisContext::ExplicitTemplateArgumentSubstitution || Kind == CodeSynthesisContext::DeducedTemplateArgumentSubstitution"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 297, __PRETTY_FUNCTION__))
;
298}
299
300Sema::InstantiatingTemplate::InstantiatingTemplate(
301 Sema &SemaRef, SourceLocation PointOfInstantiation,
302 TemplateDecl *Template,
303 ArrayRef<TemplateArgument> TemplateArgs,
304 sema::TemplateDeductionInfo &DeductionInfo, SourceRange InstantiationRange)
305 : InstantiatingTemplate(
306 SemaRef,
307 CodeSynthesisContext::DeducedTemplateArgumentSubstitution,
308 PointOfInstantiation, InstantiationRange, Template, nullptr,
309 TemplateArgs, &DeductionInfo) {}
310
311Sema::InstantiatingTemplate::InstantiatingTemplate(
312 Sema &SemaRef, SourceLocation PointOfInstantiation,
313 ClassTemplatePartialSpecializationDecl *PartialSpec,
314 ArrayRef<TemplateArgument> TemplateArgs,
315 sema::TemplateDeductionInfo &DeductionInfo, SourceRange InstantiationRange)
316 : InstantiatingTemplate(
317 SemaRef,
318 CodeSynthesisContext::DeducedTemplateArgumentSubstitution,
319 PointOfInstantiation, InstantiationRange, PartialSpec, nullptr,
320 TemplateArgs, &DeductionInfo) {}
321
322Sema::InstantiatingTemplate::InstantiatingTemplate(
323 Sema &SemaRef, SourceLocation PointOfInstantiation,
324 VarTemplatePartialSpecializationDecl *PartialSpec,
325 ArrayRef<TemplateArgument> TemplateArgs,
326 sema::TemplateDeductionInfo &DeductionInfo, SourceRange InstantiationRange)
327 : InstantiatingTemplate(
328 SemaRef,
329 CodeSynthesisContext::DeducedTemplateArgumentSubstitution,
330 PointOfInstantiation, InstantiationRange, PartialSpec, nullptr,
331 TemplateArgs, &DeductionInfo) {}
332
333Sema::InstantiatingTemplate::InstantiatingTemplate(
334 Sema &SemaRef, SourceLocation PointOfInstantiation, ParmVarDecl *Param,
335 ArrayRef<TemplateArgument> TemplateArgs, SourceRange InstantiationRange)
336 : InstantiatingTemplate(
337 SemaRef,
338 CodeSynthesisContext::DefaultFunctionArgumentInstantiation,
339 PointOfInstantiation, InstantiationRange, Param, nullptr,
340 TemplateArgs) {}
341
342Sema::InstantiatingTemplate::InstantiatingTemplate(
343 Sema &SemaRef, SourceLocation PointOfInstantiation, NamedDecl *Template,
344 NonTypeTemplateParmDecl *Param, ArrayRef<TemplateArgument> TemplateArgs,
345 SourceRange InstantiationRange)
346 : InstantiatingTemplate(
347 SemaRef,
348 CodeSynthesisContext::PriorTemplateArgumentSubstitution,
349 PointOfInstantiation, InstantiationRange, Param, Template,
350 TemplateArgs) {}
351
352Sema::InstantiatingTemplate::InstantiatingTemplate(
353 Sema &SemaRef, SourceLocation PointOfInstantiation, NamedDecl *Template,
354 TemplateTemplateParmDecl *Param, ArrayRef<TemplateArgument> TemplateArgs,
355 SourceRange InstantiationRange)
356 : InstantiatingTemplate(
357 SemaRef,
358 CodeSynthesisContext::PriorTemplateArgumentSubstitution,
359 PointOfInstantiation, InstantiationRange, Param, Template,
360 TemplateArgs) {}
361
362Sema::InstantiatingTemplate::InstantiatingTemplate(
363 Sema &SemaRef, SourceLocation PointOfInstantiation, TemplateDecl *Template,
364 NamedDecl *Param, ArrayRef<TemplateArgument> TemplateArgs,
365 SourceRange InstantiationRange)
366 : InstantiatingTemplate(
367 SemaRef, CodeSynthesisContext::DefaultTemplateArgumentChecking,
368 PointOfInstantiation, InstantiationRange, Param, Template,
369 TemplateArgs) {}
370
371Sema::InstantiatingTemplate::InstantiatingTemplate(
372 Sema &SemaRef, SourceLocation PointOfInstantiation,
373 concepts::Requirement *Req, sema::TemplateDeductionInfo &DeductionInfo,
374 SourceRange InstantiationRange)
375 : InstantiatingTemplate(
376 SemaRef, CodeSynthesisContext::RequirementInstantiation,
377 PointOfInstantiation, InstantiationRange, /*Entity=*/nullptr,
378 /*Template=*/nullptr, /*TemplateArgs=*/None, &DeductionInfo) {}
379
380
381Sema::InstantiatingTemplate::InstantiatingTemplate(
382 Sema &SemaRef, SourceLocation PointOfInstantiation,
383 concepts::NestedRequirement *Req, ConstraintsCheck,
384 SourceRange InstantiationRange)
385 : InstantiatingTemplate(
386 SemaRef, CodeSynthesisContext::NestedRequirementConstraintsCheck,
387 PointOfInstantiation, InstantiationRange, /*Entity=*/nullptr,
388 /*Template=*/nullptr, /*TemplateArgs=*/None) {}
389
390
391Sema::InstantiatingTemplate::InstantiatingTemplate(
392 Sema &SemaRef, SourceLocation PointOfInstantiation,
393 ConstraintsCheck, NamedDecl *Template,
394 ArrayRef<TemplateArgument> TemplateArgs, SourceRange InstantiationRange)
395 : InstantiatingTemplate(
396 SemaRef, CodeSynthesisContext::ConstraintsCheck,
397 PointOfInstantiation, InstantiationRange, Template, nullptr,
398 TemplateArgs) {}
399
400Sema::InstantiatingTemplate::InstantiatingTemplate(
401 Sema &SemaRef, SourceLocation PointOfInstantiation,
402 ConstraintSubstitution, NamedDecl *Template,
403 sema::TemplateDeductionInfo &DeductionInfo, SourceRange InstantiationRange)
404 : InstantiatingTemplate(
405 SemaRef, CodeSynthesisContext::ConstraintSubstitution,
406 PointOfInstantiation, InstantiationRange, Template, nullptr,
407 {}, &DeductionInfo) {}
408
409Sema::InstantiatingTemplate::InstantiatingTemplate(
410 Sema &SemaRef, SourceLocation PointOfInstantiation,
411 ConstraintNormalization, NamedDecl *Template,
412 SourceRange InstantiationRange)
413 : InstantiatingTemplate(
414 SemaRef, CodeSynthesisContext::ConstraintNormalization,
415 PointOfInstantiation, InstantiationRange, Template) {}
416
417Sema::InstantiatingTemplate::InstantiatingTemplate(
418 Sema &SemaRef, SourceLocation PointOfInstantiation,
419 ParameterMappingSubstitution, NamedDecl *Template,
420 SourceRange InstantiationRange)
421 : InstantiatingTemplate(
422 SemaRef, CodeSynthesisContext::ParameterMappingSubstitution,
423 PointOfInstantiation, InstantiationRange, Template) {}
424
425void Sema::pushCodeSynthesisContext(CodeSynthesisContext Ctx) {
426 Ctx.SavedInNonInstantiationSFINAEContext = InNonInstantiationSFINAEContext;
427 InNonInstantiationSFINAEContext = false;
428
429 CodeSynthesisContexts.push_back(Ctx);
430
431 if (!Ctx.isInstantiationRecord())
432 ++NonInstantiationEntries;
433
434 // Check to see if we're low on stack space. We can't do anything about this
435 // from here, but we can at least warn the user.
436 if (isStackNearlyExhausted())
437 warnStackExhausted(Ctx.PointOfInstantiation);
438}
439
440void Sema::popCodeSynthesisContext() {
441 auto &Active = CodeSynthesisContexts.back();
442 if (!Active.isInstantiationRecord()) {
443 assert(NonInstantiationEntries > 0)((NonInstantiationEntries > 0) ? static_cast<void> (
0) : __assert_fail ("NonInstantiationEntries > 0", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 443, __PRETTY_FUNCTION__))
;
444 --NonInstantiationEntries;
445 }
446
447 InNonInstantiationSFINAEContext = Active.SavedInNonInstantiationSFINAEContext;
448
449 // Name lookup no longer looks in this template's defining module.
450 assert(CodeSynthesisContexts.size() >=((CodeSynthesisContexts.size() >= CodeSynthesisContextLookupModules
.size() && "forgot to remove a lookup module for a template instantiation"
) ? static_cast<void> (0) : __assert_fail ("CodeSynthesisContexts.size() >= CodeSynthesisContextLookupModules.size() && \"forgot to remove a lookup module for a template instantiation\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 452, __PRETTY_FUNCTION__))
451 CodeSynthesisContextLookupModules.size() &&((CodeSynthesisContexts.size() >= CodeSynthesisContextLookupModules
.size() && "forgot to remove a lookup module for a template instantiation"
) ? static_cast<void> (0) : __assert_fail ("CodeSynthesisContexts.size() >= CodeSynthesisContextLookupModules.size() && \"forgot to remove a lookup module for a template instantiation\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 452, __PRETTY_FUNCTION__))
452 "forgot to remove a lookup module for a template instantiation")((CodeSynthesisContexts.size() >= CodeSynthesisContextLookupModules
.size() && "forgot to remove a lookup module for a template instantiation"
) ? static_cast<void> (0) : __assert_fail ("CodeSynthesisContexts.size() >= CodeSynthesisContextLookupModules.size() && \"forgot to remove a lookup module for a template instantiation\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 452, __PRETTY_FUNCTION__))
;
453 if (CodeSynthesisContexts.size() ==
454 CodeSynthesisContextLookupModules.size()) {
455 if (Module *M = CodeSynthesisContextLookupModules.back())
456 LookupModulesCache.erase(M);
457 CodeSynthesisContextLookupModules.pop_back();
458 }
459
460 // If we've left the code synthesis context for the current context stack,
461 // stop remembering that we've emitted that stack.
462 if (CodeSynthesisContexts.size() ==
463 LastEmittedCodeSynthesisContextDepth)
464 LastEmittedCodeSynthesisContextDepth = 0;
465
466 CodeSynthesisContexts.pop_back();
467}
468
469void Sema::InstantiatingTemplate::Clear() {
470 if (!Invalid) {
471 if (!AlreadyInstantiating) {
472 auto &Active = SemaRef.CodeSynthesisContexts.back();
473 if (Active.Entity)
474 SemaRef.InstantiatingSpecializations.erase(
475 std::make_pair(Active.Entity, Active.Kind));
476 }
477
478 atTemplateEnd(SemaRef.TemplateInstCallbacks, SemaRef,
479 SemaRef.CodeSynthesisContexts.back());
480
481 SemaRef.popCodeSynthesisContext();
482 Invalid = true;
483 }
484}
485
486bool Sema::InstantiatingTemplate::CheckInstantiationDepth(
487 SourceLocation PointOfInstantiation,
488 SourceRange InstantiationRange) {
489 assert(SemaRef.NonInstantiationEntries <=((SemaRef.NonInstantiationEntries <= SemaRef.CodeSynthesisContexts
.size()) ? static_cast<void> (0) : __assert_fail ("SemaRef.NonInstantiationEntries <= SemaRef.CodeSynthesisContexts.size()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 490, __PRETTY_FUNCTION__))
490 SemaRef.CodeSynthesisContexts.size())((SemaRef.NonInstantiationEntries <= SemaRef.CodeSynthesisContexts
.size()) ? static_cast<void> (0) : __assert_fail ("SemaRef.NonInstantiationEntries <= SemaRef.CodeSynthesisContexts.size()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 490, __PRETTY_FUNCTION__))
;
491 if ((SemaRef.CodeSynthesisContexts.size() -
492 SemaRef.NonInstantiationEntries)
493 <= SemaRef.getLangOpts().InstantiationDepth)
494 return false;
495
496 SemaRef.Diag(PointOfInstantiation,
497 diag::err_template_recursion_depth_exceeded)
498 << SemaRef.getLangOpts().InstantiationDepth
499 << InstantiationRange;
500 SemaRef.Diag(PointOfInstantiation, diag::note_template_recursion_depth)
501 << SemaRef.getLangOpts().InstantiationDepth;
502 return true;
503}
504
505/// Prints the current instantiation stack through a series of
506/// notes.
507void Sema::PrintInstantiationStack() {
508 // Determine which template instantiations to skip, if any.
509 unsigned SkipStart = CodeSynthesisContexts.size(), SkipEnd = SkipStart;
510 unsigned Limit = Diags.getTemplateBacktraceLimit();
511 if (Limit && Limit < CodeSynthesisContexts.size()) {
512 SkipStart = Limit / 2 + Limit % 2;
513 SkipEnd = CodeSynthesisContexts.size() - Limit / 2;
514 }
515
516 // FIXME: In all of these cases, we need to show the template arguments
517 unsigned InstantiationIdx = 0;
518 for (SmallVectorImpl<CodeSynthesisContext>::reverse_iterator
519 Active = CodeSynthesisContexts.rbegin(),
520 ActiveEnd = CodeSynthesisContexts.rend();
521 Active != ActiveEnd;
522 ++Active, ++InstantiationIdx) {
523 // Skip this instantiation?
524 if (InstantiationIdx >= SkipStart && InstantiationIdx < SkipEnd) {
525 if (InstantiationIdx == SkipStart) {
526 // Note that we're skipping instantiations.
527 Diags.Report(Active->PointOfInstantiation,
528 diag::note_instantiation_contexts_suppressed)
529 << unsigned(CodeSynthesisContexts.size() - Limit);
530 }
531 continue;
532 }
533
534 switch (Active->Kind) {
535 case CodeSynthesisContext::TemplateInstantiation: {
536 Decl *D = Active->Entity;
537 if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(D)) {
538 unsigned DiagID = diag::note_template_member_class_here;
539 if (isa<ClassTemplateSpecializationDecl>(Record))
540 DiagID = diag::note_template_class_instantiation_here;
541 Diags.Report(Active->PointOfInstantiation, DiagID)
542 << Record << Active->InstantiationRange;
543 } else if (FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) {
544 unsigned DiagID;
545 if (Function->getPrimaryTemplate())
546 DiagID = diag::note_function_template_spec_here;
547 else
548 DiagID = diag::note_template_member_function_here;
549 Diags.Report(Active->PointOfInstantiation, DiagID)
550 << Function
551 << Active->InstantiationRange;
552 } else if (VarDecl *VD = dyn_cast<VarDecl>(D)) {
553 Diags.Report(Active->PointOfInstantiation,
554 VD->isStaticDataMember()?
555 diag::note_template_static_data_member_def_here
556 : diag::note_template_variable_def_here)
557 << VD
558 << Active->InstantiationRange;
559 } else if (EnumDecl *ED = dyn_cast<EnumDecl>(D)) {
560 Diags.Report(Active->PointOfInstantiation,
561 diag::note_template_enum_def_here)
562 << ED
563 << Active->InstantiationRange;
564 } else if (FieldDecl *FD = dyn_cast<FieldDecl>(D)) {
565 Diags.Report(Active->PointOfInstantiation,
566 diag::note_template_nsdmi_here)
567 << FD << Active->InstantiationRange;
568 } else {
569 Diags.Report(Active->PointOfInstantiation,
570 diag::note_template_type_alias_instantiation_here)
571 << cast<TypeAliasTemplateDecl>(D)
572 << Active->InstantiationRange;
573 }
574 break;
575 }
576
577 case CodeSynthesisContext::DefaultTemplateArgumentInstantiation: {
578 TemplateDecl *Template = cast<TemplateDecl>(Active->Template);
579 SmallVector<char, 128> TemplateArgsStr;
580 llvm::raw_svector_ostream OS(TemplateArgsStr);
581 Template->printName(OS);
582 printTemplateArgumentList(OS, Active->template_arguments(),
583 getPrintingPolicy());
584 Diags.Report(Active->PointOfInstantiation,
585 diag::note_default_arg_instantiation_here)
586 << OS.str()
587 << Active->InstantiationRange;
588 break;
589 }
590
591 case CodeSynthesisContext::ExplicitTemplateArgumentSubstitution: {
592 FunctionTemplateDecl *FnTmpl = cast<FunctionTemplateDecl>(Active->Entity);
593 Diags.Report(Active->PointOfInstantiation,
594 diag::note_explicit_template_arg_substitution_here)
595 << FnTmpl
596 << getTemplateArgumentBindingsText(FnTmpl->getTemplateParameters(),
597 Active->TemplateArgs,
598 Active->NumTemplateArgs)
599 << Active->InstantiationRange;
600 break;
601 }
602
603 case CodeSynthesisContext::DeducedTemplateArgumentSubstitution: {
604 if (FunctionTemplateDecl *FnTmpl =
605 dyn_cast<FunctionTemplateDecl>(Active->Entity)) {
606 Diags.Report(Active->PointOfInstantiation,
607 diag::note_function_template_deduction_instantiation_here)
608 << FnTmpl
609 << getTemplateArgumentBindingsText(FnTmpl->getTemplateParameters(),
610 Active->TemplateArgs,
611 Active->NumTemplateArgs)
612 << Active->InstantiationRange;
613 } else {
614 bool IsVar = isa<VarTemplateDecl>(Active->Entity) ||
615 isa<VarTemplateSpecializationDecl>(Active->Entity);
616 bool IsTemplate = false;
617 TemplateParameterList *Params;
618 if (auto *D = dyn_cast<TemplateDecl>(Active->Entity)) {
619 IsTemplate = true;
620 Params = D->getTemplateParameters();
621 } else if (auto *D = dyn_cast<ClassTemplatePartialSpecializationDecl>(
622 Active->Entity)) {
623 Params = D->getTemplateParameters();
624 } else if (auto *D = dyn_cast<VarTemplatePartialSpecializationDecl>(
625 Active->Entity)) {
626 Params = D->getTemplateParameters();
627 } else {
628 llvm_unreachable("unexpected template kind")::llvm::llvm_unreachable_internal("unexpected template kind",
"/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 628)
;
629 }
630
631 Diags.Report(Active->PointOfInstantiation,
632 diag::note_deduced_template_arg_substitution_here)
633 << IsVar << IsTemplate << cast<NamedDecl>(Active->Entity)
634 << getTemplateArgumentBindingsText(Params, Active->TemplateArgs,
635 Active->NumTemplateArgs)
636 << Active->InstantiationRange;
637 }
638 break;
639 }
640
641 case CodeSynthesisContext::DefaultFunctionArgumentInstantiation: {
642 ParmVarDecl *Param = cast<ParmVarDecl>(Active->Entity);
643 FunctionDecl *FD = cast<FunctionDecl>(Param->getDeclContext());
644
645 SmallVector<char, 128> TemplateArgsStr;
646 llvm::raw_svector_ostream OS(TemplateArgsStr);
647 FD->printName(OS);
648 printTemplateArgumentList(OS, Active->template_arguments(),
649 getPrintingPolicy());
650 Diags.Report(Active->PointOfInstantiation,
651 diag::note_default_function_arg_instantiation_here)
652 << OS.str()
653 << Active->InstantiationRange;
654 break;
655 }
656
657 case CodeSynthesisContext::PriorTemplateArgumentSubstitution: {
658 NamedDecl *Parm = cast<NamedDecl>(Active->Entity);
659 std::string Name;
660 if (!Parm->getName().empty())
661 Name = std::string(" '") + Parm->getName().str() + "'";
662
663 TemplateParameterList *TemplateParams = nullptr;
664 if (TemplateDecl *Template = dyn_cast<TemplateDecl>(Active->Template))
665 TemplateParams = Template->getTemplateParameters();
666 else
667 TemplateParams =
668 cast<ClassTemplatePartialSpecializationDecl>(Active->Template)
669 ->getTemplateParameters();
670 Diags.Report(Active->PointOfInstantiation,
671 diag::note_prior_template_arg_substitution)
672 << isa<TemplateTemplateParmDecl>(Parm)
673 << Name
674 << getTemplateArgumentBindingsText(TemplateParams,
675 Active->TemplateArgs,
676 Active->NumTemplateArgs)
677 << Active->InstantiationRange;
678 break;
679 }
680
681 case CodeSynthesisContext::DefaultTemplateArgumentChecking: {
682 TemplateParameterList *TemplateParams = nullptr;
683 if (TemplateDecl *Template = dyn_cast<TemplateDecl>(Active->Template))
684 TemplateParams = Template->getTemplateParameters();
685 else
686 TemplateParams =
687 cast<ClassTemplatePartialSpecializationDecl>(Active->Template)
688 ->getTemplateParameters();
689
690 Diags.Report(Active->PointOfInstantiation,
691 diag::note_template_default_arg_checking)
692 << getTemplateArgumentBindingsText(TemplateParams,
693 Active->TemplateArgs,
694 Active->NumTemplateArgs)
695 << Active->InstantiationRange;
696 break;
697 }
698
699 case CodeSynthesisContext::ExceptionSpecEvaluation:
700 Diags.Report(Active->PointOfInstantiation,
701 diag::note_evaluating_exception_spec_here)
702 << cast<FunctionDecl>(Active->Entity);
703 break;
704
705 case CodeSynthesisContext::ExceptionSpecInstantiation:
706 Diags.Report(Active->PointOfInstantiation,
707 diag::note_template_exception_spec_instantiation_here)
708 << cast<FunctionDecl>(Active->Entity)
709 << Active->InstantiationRange;
710 break;
711
712 case CodeSynthesisContext::RequirementInstantiation:
713 Diags.Report(Active->PointOfInstantiation,
714 diag::note_template_requirement_instantiation_here)
715 << Active->InstantiationRange;
716 break;
717
718 case CodeSynthesisContext::NestedRequirementConstraintsCheck:
719 Diags.Report(Active->PointOfInstantiation,
720 diag::note_nested_requirement_here)
721 << Active->InstantiationRange;
722 break;
723
724 case CodeSynthesisContext::DeclaringSpecialMember:
725 Diags.Report(Active->PointOfInstantiation,
726 diag::note_in_declaration_of_implicit_special_member)
727 << cast<CXXRecordDecl>(Active->Entity) << Active->SpecialMember;
728 break;
729
730 case CodeSynthesisContext::DeclaringImplicitEqualityComparison:
731 Diags.Report(Active->Entity->getLocation(),
732 diag::note_in_declaration_of_implicit_equality_comparison);
733 break;
734
735 case CodeSynthesisContext::DefiningSynthesizedFunction: {
736 // FIXME: For synthesized functions that are not defaulted,
737 // produce a note.
738 auto *FD = dyn_cast<FunctionDecl>(Active->Entity);
739 DefaultedFunctionKind DFK =
740 FD ? getDefaultedFunctionKind(FD) : DefaultedFunctionKind();
741 if (DFK.isSpecialMember()) {
742 auto *MD = cast<CXXMethodDecl>(FD);
743 Diags.Report(Active->PointOfInstantiation,
744 diag::note_member_synthesized_at)
745 << MD->isExplicitlyDefaulted() << DFK.asSpecialMember()
746 << Context.getTagDeclType(MD->getParent());
747 } else if (DFK.isComparison()) {
748 Diags.Report(Active->PointOfInstantiation,
749 diag::note_comparison_synthesized_at)
750 << (int)DFK.asComparison()
751 << Context.getTagDeclType(
752 cast<CXXRecordDecl>(FD->getLexicalDeclContext()));
753 }
754 break;
755 }
756
757 case CodeSynthesisContext::RewritingOperatorAsSpaceship:
758 Diags.Report(Active->Entity->getLocation(),
759 diag::note_rewriting_operator_as_spaceship);
760 break;
761
762 case CodeSynthesisContext::Memoization:
763 break;
764
765 case CodeSynthesisContext::ConstraintsCheck: {
766 unsigned DiagID = 0;
767 if (!Active->Entity) {
768 Diags.Report(Active->PointOfInstantiation,
769 diag::note_nested_requirement_here)
770 << Active->InstantiationRange;
771 break;
772 }
773 if (isa<ConceptDecl>(Active->Entity))
774 DiagID = diag::note_concept_specialization_here;
775 else if (isa<TemplateDecl>(Active->Entity))
776 DiagID = diag::note_checking_constraints_for_template_id_here;
777 else if (isa<VarTemplatePartialSpecializationDecl>(Active->Entity))
778 DiagID = diag::note_checking_constraints_for_var_spec_id_here;
779 else if (isa<ClassTemplatePartialSpecializationDecl>(Active->Entity))
780 DiagID = diag::note_checking_constraints_for_class_spec_id_here;
781 else {
782 assert(isa<FunctionDecl>(Active->Entity))((isa<FunctionDecl>(Active->Entity)) ? static_cast<
void> (0) : __assert_fail ("isa<FunctionDecl>(Active->Entity)"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 782, __PRETTY_FUNCTION__))
;
783 DiagID = diag::note_checking_constraints_for_function_here;
784 }
785 SmallVector<char, 128> TemplateArgsStr;
786 llvm::raw_svector_ostream OS(TemplateArgsStr);
787 cast<NamedDecl>(Active->Entity)->printName(OS);
788 if (!isa<FunctionDecl>(Active->Entity))
789 printTemplateArgumentList(OS, Active->template_arguments(),
790 getPrintingPolicy());
791 Diags.Report(Active->PointOfInstantiation, DiagID) << OS.str()
792 << Active->InstantiationRange;
793 break;
794 }
795 case CodeSynthesisContext::ConstraintSubstitution:
796 Diags.Report(Active->PointOfInstantiation,
797 diag::note_constraint_substitution_here)
798 << Active->InstantiationRange;
799 break;
800 case CodeSynthesisContext::ConstraintNormalization:
801 Diags.Report(Active->PointOfInstantiation,
802 diag::note_constraint_normalization_here)
803 << cast<NamedDecl>(Active->Entity)->getName()
804 << Active->InstantiationRange;
805 break;
806 case CodeSynthesisContext::ParameterMappingSubstitution:
807 Diags.Report(Active->PointOfInstantiation,
808 diag::note_parameter_mapping_substitution_here)
809 << Active->InstantiationRange;
810 break;
811 }
812 }
813}
814
815Optional<TemplateDeductionInfo *> Sema::isSFINAEContext() const {
816 if (InNonInstantiationSFINAEContext)
817 return Optional<TemplateDeductionInfo *>(nullptr);
818
819 for (SmallVectorImpl<CodeSynthesisContext>::const_reverse_iterator
820 Active = CodeSynthesisContexts.rbegin(),
821 ActiveEnd = CodeSynthesisContexts.rend();
822 Active != ActiveEnd;
823 ++Active)
824 {
825 switch (Active->Kind) {
826 case CodeSynthesisContext::TemplateInstantiation:
827 // An instantiation of an alias template may or may not be a SFINAE
828 // context, depending on what else is on the stack.
829 if (isa<TypeAliasTemplateDecl>(Active->Entity))
830 break;
831 LLVM_FALLTHROUGH[[gnu::fallthrough]];
832 case CodeSynthesisContext::DefaultFunctionArgumentInstantiation:
833 case CodeSynthesisContext::ExceptionSpecInstantiation:
834 case CodeSynthesisContext::ConstraintsCheck:
835 case CodeSynthesisContext::ParameterMappingSubstitution:
836 case CodeSynthesisContext::ConstraintNormalization:
837 case CodeSynthesisContext::NestedRequirementConstraintsCheck:
838 // This is a template instantiation, so there is no SFINAE.
839 return None;
840
841 case CodeSynthesisContext::DefaultTemplateArgumentInstantiation:
842 case CodeSynthesisContext::PriorTemplateArgumentSubstitution:
843 case CodeSynthesisContext::DefaultTemplateArgumentChecking:
844 // A default template argument instantiation and substitution into
845 // template parameters with arguments for prior parameters may or may
846 // not be a SFINAE context; look further up the stack.
847 break;
848
849 case CodeSynthesisContext::ExplicitTemplateArgumentSubstitution:
850 case CodeSynthesisContext::DeducedTemplateArgumentSubstitution:
851 case CodeSynthesisContext::ConstraintSubstitution:
852 case CodeSynthesisContext::RequirementInstantiation:
853 // We're either substituting explicitly-specified template arguments,
854 // deduced template arguments, a constraint expression or a requirement
855 // in a requires expression, so SFINAE applies.
856 assert(Active->DeductionInfo && "Missing deduction info pointer")((Active->DeductionInfo && "Missing deduction info pointer"
) ? static_cast<void> (0) : __assert_fail ("Active->DeductionInfo && \"Missing deduction info pointer\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 856, __PRETTY_FUNCTION__))
;
857 return Active->DeductionInfo;
858
859 case CodeSynthesisContext::DeclaringSpecialMember:
860 case CodeSynthesisContext::DeclaringImplicitEqualityComparison:
861 case CodeSynthesisContext::DefiningSynthesizedFunction:
862 case CodeSynthesisContext::RewritingOperatorAsSpaceship:
863 // This happens in a context unrelated to template instantiation, so
864 // there is no SFINAE.
865 return None;
866
867 case CodeSynthesisContext::ExceptionSpecEvaluation:
868 // FIXME: This should not be treated as a SFINAE context, because
869 // we will cache an incorrect exception specification. However, clang
870 // bootstrap relies this! See PR31692.
871 break;
872
873 case CodeSynthesisContext::Memoization:
874 break;
875 }
876
877 // The inner context was transparent for SFINAE. If it occurred within a
878 // non-instantiation SFINAE context, then SFINAE applies.
879 if (Active->SavedInNonInstantiationSFINAEContext)
880 return Optional<TemplateDeductionInfo *>(nullptr);
881 }
882
883 return None;
884}
885
886//===----------------------------------------------------------------------===/
887// Template Instantiation for Types
888//===----------------------------------------------------------------------===/
889namespace {
890 class TemplateInstantiator : public TreeTransform<TemplateInstantiator> {
891 const MultiLevelTemplateArgumentList &TemplateArgs;
892 SourceLocation Loc;
893 DeclarationName Entity;
894
895 public:
896 typedef TreeTransform<TemplateInstantiator> inherited;
897
898 TemplateInstantiator(Sema &SemaRef,
899 const MultiLevelTemplateArgumentList &TemplateArgs,
900 SourceLocation Loc,
901 DeclarationName Entity)
902 : inherited(SemaRef), TemplateArgs(TemplateArgs), Loc(Loc),
903 Entity(Entity) { }
904
905 /// Determine whether the given type \p T has already been
906 /// transformed.
907 ///
908 /// For the purposes of template instantiation, a type has already been
909 /// transformed if it is NULL or if it is not dependent.
910 bool AlreadyTransformed(QualType T);
911
912 /// Returns the location of the entity being instantiated, if known.
913 SourceLocation getBaseLocation() { return Loc; }
914
915 /// Returns the name of the entity being instantiated, if any.
916 DeclarationName getBaseEntity() { return Entity; }
917
918 /// Sets the "base" location and entity when that
919 /// information is known based on another transformation.
920 void setBase(SourceLocation Loc, DeclarationName Entity) {
921 this->Loc = Loc;
922 this->Entity = Entity;
923 }
924
925 bool TryExpandParameterPacks(SourceLocation EllipsisLoc,
926 SourceRange PatternRange,
927 ArrayRef<UnexpandedParameterPack> Unexpanded,
928 bool &ShouldExpand, bool &RetainExpansion,
929 Optional<unsigned> &NumExpansions) {
930 return getSema().CheckParameterPacksForExpansion(EllipsisLoc,
931 PatternRange, Unexpanded,
932 TemplateArgs,
933 ShouldExpand,
934 RetainExpansion,
935 NumExpansions);
936 }
937
938 void ExpandingFunctionParameterPack(ParmVarDecl *Pack) {
939 SemaRef.CurrentInstantiationScope->MakeInstantiatedLocalArgPack(Pack);
940 }
941
942 TemplateArgument ForgetPartiallySubstitutedPack() {
943 TemplateArgument Result;
944 if (NamedDecl *PartialPack
945 = SemaRef.CurrentInstantiationScope->getPartiallySubstitutedPack()){
946 MultiLevelTemplateArgumentList &TemplateArgs
947 = const_cast<MultiLevelTemplateArgumentList &>(this->TemplateArgs);
948 unsigned Depth, Index;
949 std::tie(Depth, Index) = getDepthAndIndex(PartialPack);
950 if (TemplateArgs.hasTemplateArgument(Depth, Index)) {
951 Result = TemplateArgs(Depth, Index);
952 TemplateArgs.setArgument(Depth, Index, TemplateArgument());
953 }
954 }
955
956 return Result;
957 }
958
959 void RememberPartiallySubstitutedPack(TemplateArgument Arg) {
960 if (Arg.isNull())
961 return;
962
963 if (NamedDecl *PartialPack
964 = SemaRef.CurrentInstantiationScope->getPartiallySubstitutedPack()){
965 MultiLevelTemplateArgumentList &TemplateArgs
966 = const_cast<MultiLevelTemplateArgumentList &>(this->TemplateArgs);
967 unsigned Depth, Index;
968 std::tie(Depth, Index) = getDepthAndIndex(PartialPack);
969 TemplateArgs.setArgument(Depth, Index, Arg);
970 }
971 }
972
973 /// Transform the given declaration by instantiating a reference to
974 /// this declaration.
975 Decl *TransformDecl(SourceLocation Loc, Decl *D);
976
977 void transformAttrs(Decl *Old, Decl *New) {
978 SemaRef.InstantiateAttrs(TemplateArgs, Old, New);
979 }
980
981 void transformedLocalDecl(Decl *Old, ArrayRef<Decl *> NewDecls) {
982 if (Old->isParameterPack()) {
983 SemaRef.CurrentInstantiationScope->MakeInstantiatedLocalArgPack(Old);
984 for (auto *New : NewDecls)
985 SemaRef.CurrentInstantiationScope->InstantiatedLocalPackArg(
986 Old, cast<VarDecl>(New));
987 return;
988 }
989
990 assert(NewDecls.size() == 1 &&((NewDecls.size() == 1 && "should only have multiple expansions for a pack"
) ? static_cast<void> (0) : __assert_fail ("NewDecls.size() == 1 && \"should only have multiple expansions for a pack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 991, __PRETTY_FUNCTION__))
991 "should only have multiple expansions for a pack")((NewDecls.size() == 1 && "should only have multiple expansions for a pack"
) ? static_cast<void> (0) : __assert_fail ("NewDecls.size() == 1 && \"should only have multiple expansions for a pack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 991, __PRETTY_FUNCTION__))
;
992 Decl *New = NewDecls.front();
993
994 // If we've instantiated the call operator of a lambda or the call
995 // operator template of a generic lambda, update the "instantiation of"
996 // information.
997 auto *NewMD = dyn_cast<CXXMethodDecl>(New);
998 if (NewMD && isLambdaCallOperator(NewMD)) {
999 auto *OldMD = dyn_cast<CXXMethodDecl>(Old);
1000 if (auto *NewTD = NewMD->getDescribedFunctionTemplate())
1001 NewTD->setInstantiatedFromMemberTemplate(
1002 OldMD->getDescribedFunctionTemplate());
1003 else
1004 NewMD->setInstantiationOfMemberFunction(OldMD,
1005 TSK_ImplicitInstantiation);
1006 }
1007
1008 SemaRef.CurrentInstantiationScope->InstantiatedLocal(Old, New);
1009
1010 // We recreated a local declaration, but not by instantiating it. There
1011 // may be pending dependent diagnostics to produce.
1012 if (auto *DC = dyn_cast<DeclContext>(Old))
1013 SemaRef.PerformDependentDiagnostics(DC, TemplateArgs);
1014 }
1015
1016 /// Transform the definition of the given declaration by
1017 /// instantiating it.
1018 Decl *TransformDefinition(SourceLocation Loc, Decl *D);
1019
1020 /// Transform the first qualifier within a scope by instantiating the
1021 /// declaration.
1022 NamedDecl *TransformFirstQualifierInScope(NamedDecl *D, SourceLocation Loc);
1023
1024 /// Rebuild the exception declaration and register the declaration
1025 /// as an instantiated local.
1026 VarDecl *RebuildExceptionDecl(VarDecl *ExceptionDecl,
1027 TypeSourceInfo *Declarator,
1028 SourceLocation StartLoc,
1029 SourceLocation NameLoc,
1030 IdentifierInfo *Name);
1031
1032 /// Rebuild the Objective-C exception declaration and register the
1033 /// declaration as an instantiated local.
1034 VarDecl *RebuildObjCExceptionDecl(VarDecl *ExceptionDecl,
1035 TypeSourceInfo *TSInfo, QualType T);
1036
1037 /// Check for tag mismatches when instantiating an
1038 /// elaborated type.
1039 QualType RebuildElaboratedType(SourceLocation KeywordLoc,
1040 ElaboratedTypeKeyword Keyword,
1041 NestedNameSpecifierLoc QualifierLoc,
1042 QualType T);
1043
1044 TemplateName
1045 TransformTemplateName(CXXScopeSpec &SS, TemplateName Name,
1046 SourceLocation NameLoc,
1047 QualType ObjectType = QualType(),
1048 NamedDecl *FirstQualifierInScope = nullptr,
1049 bool AllowInjectedClassName = false);
1050
1051 const LoopHintAttr *TransformLoopHintAttr(const LoopHintAttr *LH);
1052
1053 ExprResult TransformPredefinedExpr(PredefinedExpr *E);
1054 ExprResult TransformDeclRefExpr(DeclRefExpr *E);
1055 ExprResult TransformCXXDefaultArgExpr(CXXDefaultArgExpr *E);
1056
1057 ExprResult TransformTemplateParmRefExpr(DeclRefExpr *E,
1058 NonTypeTemplateParmDecl *D);
1059 ExprResult TransformSubstNonTypeTemplateParmPackExpr(
1060 SubstNonTypeTemplateParmPackExpr *E);
1061 ExprResult TransformSubstNonTypeTemplateParmExpr(
1062 SubstNonTypeTemplateParmExpr *E);
1063
1064 /// Rebuild a DeclRefExpr for a VarDecl reference.
1065 ExprResult RebuildVarDeclRefExpr(VarDecl *PD, SourceLocation Loc);
1066
1067 /// Transform a reference to a function or init-capture parameter pack.
1068 ExprResult TransformFunctionParmPackRefExpr(DeclRefExpr *E, VarDecl *PD);
1069
1070 /// Transform a FunctionParmPackExpr which was built when we couldn't
1071 /// expand a function parameter pack reference which refers to an expanded
1072 /// pack.
1073 ExprResult TransformFunctionParmPackExpr(FunctionParmPackExpr *E);
1074
1075 QualType TransformFunctionProtoType(TypeLocBuilder &TLB,
1076 FunctionProtoTypeLoc TL) {
1077 // Call the base version; it will forward to our overridden version below.
1078 return inherited::TransformFunctionProtoType(TLB, TL);
1079 }
1080
1081 template<typename Fn>
1082 QualType TransformFunctionProtoType(TypeLocBuilder &TLB,
1083 FunctionProtoTypeLoc TL,
1084 CXXRecordDecl *ThisContext,
1085 Qualifiers ThisTypeQuals,
1086 Fn TransformExceptionSpec);
1087
1088 ParmVarDecl *TransformFunctionTypeParam(ParmVarDecl *OldParm,
1089 int indexAdjustment,
1090 Optional<unsigned> NumExpansions,
1091 bool ExpectParameterPack);
1092
1093 /// Transforms a template type parameter type by performing
1094 /// substitution of the corresponding template type argument.
1095 QualType TransformTemplateTypeParmType(TypeLocBuilder &TLB,
1096 TemplateTypeParmTypeLoc TL);
1097
1098 /// Transforms an already-substituted template type parameter pack
1099 /// into either itself (if we aren't substituting into its pack expansion)
1100 /// or the appropriate substituted argument.
1101 QualType TransformSubstTemplateTypeParmPackType(TypeLocBuilder &TLB,
1102 SubstTemplateTypeParmPackTypeLoc TL);
1103
1104 ExprResult TransformLambdaExpr(LambdaExpr *E) {
1105 LocalInstantiationScope Scope(SemaRef, /*CombineWithOuterScope=*/true);
1106 return TreeTransform<TemplateInstantiator>::TransformLambdaExpr(E);
1107 }
1108
1109 ExprResult TransformRequiresExpr(RequiresExpr *E) {
1110 LocalInstantiationScope Scope(SemaRef, /*CombineWithOuterScope=*/true);
1111 return TreeTransform<TemplateInstantiator>::TransformRequiresExpr(E);
1
Calling 'TreeTransform::TransformRequiresExpr'
1112 }
1113
1114 bool TransformRequiresExprRequirements(
1115 ArrayRef<concepts::Requirement *> Reqs,
1116 SmallVectorImpl<concepts::Requirement *> &Transformed) {
1117 bool SatisfactionDetermined = false;
1118 for (concepts::Requirement *Req : Reqs) {
1119 concepts::Requirement *TransReq = nullptr;
1120 if (!SatisfactionDetermined) {
1121 if (auto *TypeReq = dyn_cast<concepts::TypeRequirement>(Req))
1122 TransReq = TransformTypeRequirement(TypeReq);
1123 else if (auto *ExprReq = dyn_cast<concepts::ExprRequirement>(Req))
1124 TransReq = TransformExprRequirement(ExprReq);
1125 else
1126 TransReq = TransformNestedRequirement(
1127 cast<concepts::NestedRequirement>(Req));
1128 if (!TransReq)
1129 return true;
1130 if (!TransReq->isDependent() && !TransReq->isSatisfied())
1131 // [expr.prim.req]p6
1132 // [...] The substitution and semantic constraint checking
1133 // proceeds in lexical order and stops when a condition that
1134 // determines the result of the requires-expression is
1135 // encountered. [..]
1136 SatisfactionDetermined = true;
1137 } else
1138 TransReq = Req;
1139 Transformed.push_back(TransReq);
1140 }
1141 return false;
1142 }
1143
1144 TemplateParameterList *TransformTemplateParameterList(
1145 TemplateParameterList *OrigTPL) {
1146 if (!OrigTPL || !OrigTPL->size()) return OrigTPL;
1147
1148 DeclContext *Owner = OrigTPL->getParam(0)->getDeclContext();
1149 TemplateDeclInstantiator DeclInstantiator(getSema(),
1150 /* DeclContext *Owner */ Owner, TemplateArgs);
1151 return DeclInstantiator.SubstTemplateParams(OrigTPL);
1152 }
1153
1154 concepts::TypeRequirement *
1155 TransformTypeRequirement(concepts::TypeRequirement *Req);
1156 concepts::ExprRequirement *
1157 TransformExprRequirement(concepts::ExprRequirement *Req);
1158 concepts::NestedRequirement *
1159 TransformNestedRequirement(concepts::NestedRequirement *Req);
1160
1161 private:
1162 ExprResult transformNonTypeTemplateParmRef(NonTypeTemplateParmDecl *parm,
1163 SourceLocation loc,
1164 TemplateArgument arg);
1165 };
1166}
1167
1168bool TemplateInstantiator::AlreadyTransformed(QualType T) {
1169 if (T.isNull())
1170 return true;
1171
1172 if (T->isInstantiationDependentType() || T->isVariablyModifiedType())
1173 return false;
1174
1175 getSema().MarkDeclarationsReferencedInType(Loc, T);
1176 return true;
1177}
1178
1179static TemplateArgument
1180getPackSubstitutedTemplateArgument(Sema &S, TemplateArgument Arg) {
1181 assert(S.ArgumentPackSubstitutionIndex >= 0)((S.ArgumentPackSubstitutionIndex >= 0) ? static_cast<void
> (0) : __assert_fail ("S.ArgumentPackSubstitutionIndex >= 0"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1181, __PRETTY_FUNCTION__))
;
1182 assert(S.ArgumentPackSubstitutionIndex < (int)Arg.pack_size())((S.ArgumentPackSubstitutionIndex < (int)Arg.pack_size()) ?
static_cast<void> (0) : __assert_fail ("S.ArgumentPackSubstitutionIndex < (int)Arg.pack_size()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1182, __PRETTY_FUNCTION__))
;
1183 Arg = Arg.pack_begin()[S.ArgumentPackSubstitutionIndex];
1184 if (Arg.isPackExpansion())
1185 Arg = Arg.getPackExpansionPattern();
1186 return Arg;
1187}
1188
1189Decl *TemplateInstantiator::TransformDecl(SourceLocation Loc, Decl *D) {
1190 if (!D)
1191 return nullptr;
1192
1193 if (TemplateTemplateParmDecl *TTP = dyn_cast<TemplateTemplateParmDecl>(D)) {
1194 if (TTP->getDepth() < TemplateArgs.getNumLevels()) {
1195 // If the corresponding template argument is NULL or non-existent, it's
1196 // because we are performing instantiation from explicitly-specified
1197 // template arguments in a function template, but there were some
1198 // arguments left unspecified.
1199 if (!TemplateArgs.hasTemplateArgument(TTP->getDepth(),
1200 TTP->getPosition()))
1201 return D;
1202
1203 TemplateArgument Arg = TemplateArgs(TTP->getDepth(), TTP->getPosition());
1204
1205 if (TTP->isParameterPack()) {
1206 assert(Arg.getKind() == TemplateArgument::Pack &&((Arg.getKind() == TemplateArgument::Pack && "Missing argument pack"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Pack && \"Missing argument pack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1207, __PRETTY_FUNCTION__))
1207 "Missing argument pack")((Arg.getKind() == TemplateArgument::Pack && "Missing argument pack"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Pack && \"Missing argument pack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1207, __PRETTY_FUNCTION__))
;
1208 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1209 }
1210
1211 TemplateName Template = Arg.getAsTemplate().getNameToSubstitute();
1212 assert(!Template.isNull() && Template.getAsTemplateDecl() &&((!Template.isNull() && Template.getAsTemplateDecl() &&
"Wrong kind of template template argument") ? static_cast<
void> (0) : __assert_fail ("!Template.isNull() && Template.getAsTemplateDecl() && \"Wrong kind of template template argument\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1213, __PRETTY_FUNCTION__))
1213 "Wrong kind of template template argument")((!Template.isNull() && Template.getAsTemplateDecl() &&
"Wrong kind of template template argument") ? static_cast<
void> (0) : __assert_fail ("!Template.isNull() && Template.getAsTemplateDecl() && \"Wrong kind of template template argument\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1213, __PRETTY_FUNCTION__))
;
1214 return Template.getAsTemplateDecl();
1215 }
1216
1217 // Fall through to find the instantiated declaration for this template
1218 // template parameter.
1219 }
1220
1221 return SemaRef.FindInstantiatedDecl(Loc, cast<NamedDecl>(D), TemplateArgs);
1222}
1223
1224Decl *TemplateInstantiator::TransformDefinition(SourceLocation Loc, Decl *D) {
1225 Decl *Inst = getSema().SubstDecl(D, getSema().CurContext, TemplateArgs);
1226 if (!Inst)
1227 return nullptr;
1228
1229 getSema().CurrentInstantiationScope->InstantiatedLocal(D, Inst);
1230 return Inst;
1231}
1232
1233NamedDecl *
1234TemplateInstantiator::TransformFirstQualifierInScope(NamedDecl *D,
1235 SourceLocation Loc) {
1236 // If the first part of the nested-name-specifier was a template type
1237 // parameter, instantiate that type parameter down to a tag type.
1238 if (TemplateTypeParmDecl *TTPD = dyn_cast_or_null<TemplateTypeParmDecl>(D)) {
1239 const TemplateTypeParmType *TTP
1240 = cast<TemplateTypeParmType>(getSema().Context.getTypeDeclType(TTPD));
1241
1242 if (TTP->getDepth() < TemplateArgs.getNumLevels()) {
1243 // FIXME: This needs testing w/ member access expressions.
1244 TemplateArgument Arg = TemplateArgs(TTP->getDepth(), TTP->getIndex());
1245
1246 if (TTP->isParameterPack()) {
1247 assert(Arg.getKind() == TemplateArgument::Pack &&((Arg.getKind() == TemplateArgument::Pack && "Missing argument pack"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Pack && \"Missing argument pack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1248, __PRETTY_FUNCTION__))
1248 "Missing argument pack")((Arg.getKind() == TemplateArgument::Pack && "Missing argument pack"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Pack && \"Missing argument pack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1248, __PRETTY_FUNCTION__))
;
1249
1250 if (getSema().ArgumentPackSubstitutionIndex == -1)
1251 return nullptr;
1252
1253 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1254 }
1255
1256 QualType T = Arg.getAsType();
1257 if (T.isNull())
1258 return cast_or_null<NamedDecl>(TransformDecl(Loc, D));
1259
1260 if (const TagType *Tag = T->getAs<TagType>())
1261 return Tag->getDecl();
1262
1263 // The resulting type is not a tag; complain.
1264 getSema().Diag(Loc, diag::err_nested_name_spec_non_tag) << T;
1265 return nullptr;
1266 }
1267 }
1268
1269 return cast_or_null<NamedDecl>(TransformDecl(Loc, D));
1270}
1271
1272VarDecl *
1273TemplateInstantiator::RebuildExceptionDecl(VarDecl *ExceptionDecl,
1274 TypeSourceInfo *Declarator,
1275 SourceLocation StartLoc,
1276 SourceLocation NameLoc,
1277 IdentifierInfo *Name) {
1278 VarDecl *Var = inherited::RebuildExceptionDecl(ExceptionDecl, Declarator,
1279 StartLoc, NameLoc, Name);
1280 if (Var)
1281 getSema().CurrentInstantiationScope->InstantiatedLocal(ExceptionDecl, Var);
1282 return Var;
1283}
1284
1285VarDecl *TemplateInstantiator::RebuildObjCExceptionDecl(VarDecl *ExceptionDecl,
1286 TypeSourceInfo *TSInfo,
1287 QualType T) {
1288 VarDecl *Var = inherited::RebuildObjCExceptionDecl(ExceptionDecl, TSInfo, T);
1289 if (Var)
1290 getSema().CurrentInstantiationScope->InstantiatedLocal(ExceptionDecl, Var);
1291 return Var;
1292}
1293
1294QualType
1295TemplateInstantiator::RebuildElaboratedType(SourceLocation KeywordLoc,
1296 ElaboratedTypeKeyword Keyword,
1297 NestedNameSpecifierLoc QualifierLoc,
1298 QualType T) {
1299 if (const TagType *TT = T->getAs<TagType>()) {
1300 TagDecl* TD = TT->getDecl();
1301
1302 SourceLocation TagLocation = KeywordLoc;
1303
1304 IdentifierInfo *Id = TD->getIdentifier();
1305
1306 // TODO: should we even warn on struct/class mismatches for this? Seems
1307 // like it's likely to produce a lot of spurious errors.
1308 if (Id && Keyword != ETK_None && Keyword != ETK_Typename) {
1309 TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForKeyword(Keyword);
1310 if (!SemaRef.isAcceptableTagRedeclaration(TD, Kind, /*isDefinition*/false,
1311 TagLocation, Id)) {
1312 SemaRef.Diag(TagLocation, diag::err_use_with_wrong_tag)
1313 << Id
1314 << FixItHint::CreateReplacement(SourceRange(TagLocation),
1315 TD->getKindName());
1316 SemaRef.Diag(TD->getLocation(), diag::note_previous_use);
1317 }
1318 }
1319 }
1320
1321 return TreeTransform<TemplateInstantiator>::RebuildElaboratedType(KeywordLoc,
1322 Keyword,
1323 QualifierLoc,
1324 T);
1325}
1326
1327TemplateName TemplateInstantiator::TransformTemplateName(
1328 CXXScopeSpec &SS, TemplateName Name, SourceLocation NameLoc,
1329 QualType ObjectType, NamedDecl *FirstQualifierInScope,
1330 bool AllowInjectedClassName) {
1331 if (TemplateTemplateParmDecl *TTP
1332 = dyn_cast_or_null<TemplateTemplateParmDecl>(Name.getAsTemplateDecl())) {
1333 if (TTP->getDepth() < TemplateArgs.getNumLevels()) {
1334 // If the corresponding template argument is NULL or non-existent, it's
1335 // because we are performing instantiation from explicitly-specified
1336 // template arguments in a function template, but there were some
1337 // arguments left unspecified.
1338 if (!TemplateArgs.hasTemplateArgument(TTP->getDepth(),
1339 TTP->getPosition()))
1340 return Name;
1341
1342 TemplateArgument Arg = TemplateArgs(TTP->getDepth(), TTP->getPosition());
1343
1344 if (TTP->isParameterPack()) {
1345 assert(Arg.getKind() == TemplateArgument::Pack &&((Arg.getKind() == TemplateArgument::Pack && "Missing argument pack"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Pack && \"Missing argument pack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1346, __PRETTY_FUNCTION__))
1346 "Missing argument pack")((Arg.getKind() == TemplateArgument::Pack && "Missing argument pack"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Pack && \"Missing argument pack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1346, __PRETTY_FUNCTION__))
;
1347
1348 if (getSema().ArgumentPackSubstitutionIndex == -1) {
1349 // We have the template argument pack to substitute, but we're not
1350 // actually expanding the enclosing pack expansion yet. So, just
1351 // keep the entire argument pack.
1352 return getSema().Context.getSubstTemplateTemplateParmPack(TTP, Arg);
1353 }
1354
1355 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1356 }
1357
1358 TemplateName Template = Arg.getAsTemplate().getNameToSubstitute();
1359 assert(!Template.isNull() && "Null template template argument")((!Template.isNull() && "Null template template argument"
) ? static_cast<void> (0) : __assert_fail ("!Template.isNull() && \"Null template template argument\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1359, __PRETTY_FUNCTION__))
;
1360 assert(!Template.getAsQualifiedTemplateName() &&((!Template.getAsQualifiedTemplateName() && "template decl to substitute is qualified?"
) ? static_cast<void> (0) : __assert_fail ("!Template.getAsQualifiedTemplateName() && \"template decl to substitute is qualified?\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1361, __PRETTY_FUNCTION__))
1361 "template decl to substitute is qualified?")((!Template.getAsQualifiedTemplateName() && "template decl to substitute is qualified?"
) ? static_cast<void> (0) : __assert_fail ("!Template.getAsQualifiedTemplateName() && \"template decl to substitute is qualified?\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1361, __PRETTY_FUNCTION__))
;
1362
1363 Template = getSema().Context.getSubstTemplateTemplateParm(TTP, Template);
1364 return Template;
1365 }
1366 }
1367
1368 if (SubstTemplateTemplateParmPackStorage *SubstPack
1369 = Name.getAsSubstTemplateTemplateParmPack()) {
1370 if (getSema().ArgumentPackSubstitutionIndex == -1)
1371 return Name;
1372
1373 TemplateArgument Arg = SubstPack->getArgumentPack();
1374 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1375 return Arg.getAsTemplate().getNameToSubstitute();
1376 }
1377
1378 return inherited::TransformTemplateName(SS, Name, NameLoc, ObjectType,
1379 FirstQualifierInScope,
1380 AllowInjectedClassName);
1381}
1382
1383ExprResult
1384TemplateInstantiator::TransformPredefinedExpr(PredefinedExpr *E) {
1385 if (!E->isTypeDependent())
1386 return E;
1387
1388 return getSema().BuildPredefinedExpr(E->getLocation(), E->getIdentKind());
1389}
1390
1391ExprResult
1392TemplateInstantiator::TransformTemplateParmRefExpr(DeclRefExpr *E,
1393 NonTypeTemplateParmDecl *NTTP) {
1394 // If the corresponding template argument is NULL or non-existent, it's
1395 // because we are performing instantiation from explicitly-specified
1396 // template arguments in a function template, but there were some
1397 // arguments left unspecified.
1398 if (!TemplateArgs.hasTemplateArgument(NTTP->getDepth(),
1399 NTTP->getPosition()))
1400 return E;
1401
1402 TemplateArgument Arg = TemplateArgs(NTTP->getDepth(), NTTP->getPosition());
1403
1404 if (TemplateArgs.getNumLevels() != TemplateArgs.getNumSubstitutedLevels()) {
1405 // We're performing a partial substitution, so the substituted argument
1406 // could be dependent. As a result we can't create a SubstNonType*Expr
1407 // node now, since that represents a fully-substituted argument.
1408 // FIXME: We should have some AST representation for this.
1409 if (Arg.getKind() == TemplateArgument::Pack) {
1410 // FIXME: This won't work for alias templates.
1411 assert(Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion() &&((Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion
() && "unexpected pack arguments in partial substitution"
) ? static_cast<void> (0) : __assert_fail ("Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion() && \"unexpected pack arguments in partial substitution\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1412, __PRETTY_FUNCTION__))
1412 "unexpected pack arguments in partial substitution")((Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion
() && "unexpected pack arguments in partial substitution"
) ? static_cast<void> (0) : __assert_fail ("Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion() && \"unexpected pack arguments in partial substitution\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1412, __PRETTY_FUNCTION__))
;
1413 Arg = Arg.pack_begin()->getPackExpansionPattern();
1414 }
1415 assert(Arg.getKind() == TemplateArgument::Expression &&((Arg.getKind() == TemplateArgument::Expression && "unexpected nontype template argument kind in partial substitution"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Expression && \"unexpected nontype template argument kind in partial substitution\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1416, __PRETTY_FUNCTION__))
1416 "unexpected nontype template argument kind in partial substitution")((Arg.getKind() == TemplateArgument::Expression && "unexpected nontype template argument kind in partial substitution"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Expression && \"unexpected nontype template argument kind in partial substitution\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1416, __PRETTY_FUNCTION__))
;
1417 return Arg.getAsExpr();
1418 }
1419
1420 if (NTTP->isParameterPack()) {
1421 assert(Arg.getKind() == TemplateArgument::Pack &&((Arg.getKind() == TemplateArgument::Pack && "Missing argument pack"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Pack && \"Missing argument pack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1422, __PRETTY_FUNCTION__))
1422 "Missing argument pack")((Arg.getKind() == TemplateArgument::Pack && "Missing argument pack"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Pack && \"Missing argument pack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1422, __PRETTY_FUNCTION__))
;
1423
1424 if (getSema().ArgumentPackSubstitutionIndex == -1) {
1425 // We have an argument pack, but we can't select a particular argument
1426 // out of it yet. Therefore, we'll build an expression to hold on to that
1427 // argument pack.
1428 QualType TargetType = SemaRef.SubstType(NTTP->getType(), TemplateArgs,
1429 E->getLocation(),
1430 NTTP->getDeclName());
1431 if (TargetType.isNull())
1432 return ExprError();
1433
1434 return new (SemaRef.Context) SubstNonTypeTemplateParmPackExpr(
1435 TargetType.getNonLValueExprType(SemaRef.Context),
1436 TargetType->isReferenceType() ? VK_LValue : VK_RValue, NTTP,
1437 E->getLocation(), Arg);
1438 }
1439
1440 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1441 }
1442
1443 return transformNonTypeTemplateParmRef(NTTP, E->getLocation(), Arg);
1444}
1445
1446const LoopHintAttr *
1447TemplateInstantiator::TransformLoopHintAttr(const LoopHintAttr *LH) {
1448 Expr *TransformedExpr = getDerived().TransformExpr(LH->getValue()).get();
1449
1450 if (TransformedExpr == LH->getValue())
1451 return LH;
1452
1453 // Generate error if there is a problem with the value.
1454 if (getSema().CheckLoopHintExpr(TransformedExpr, LH->getLocation()))
1455 return LH;
1456
1457 // Create new LoopHintValueAttr with integral expression in place of the
1458 // non-type template parameter.
1459 return LoopHintAttr::CreateImplicit(getSema().Context, LH->getOption(),
1460 LH->getState(), TransformedExpr, *LH);
1461}
1462
1463ExprResult TemplateInstantiator::transformNonTypeTemplateParmRef(
1464 NonTypeTemplateParmDecl *parm,
1465 SourceLocation loc,
1466 TemplateArgument arg) {
1467 ExprResult result;
1468 QualType type;
1469
1470 // The template argument itself might be an expression, in which
1471 // case we just return that expression.
1472 if (arg.getKind() == TemplateArgument::Expression) {
1473 Expr *argExpr = arg.getAsExpr();
1474 result = argExpr;
1475 type = argExpr->getType();
1476
1477 } else if (arg.getKind() == TemplateArgument::Declaration ||
1478 arg.getKind() == TemplateArgument::NullPtr) {
1479 ValueDecl *VD;
1480 if (arg.getKind() == TemplateArgument::Declaration) {
1481 VD = arg.getAsDecl();
1482
1483 // Find the instantiation of the template argument. This is
1484 // required for nested templates.
1485 VD = cast_or_null<ValueDecl>(
1486 getSema().FindInstantiatedDecl(loc, VD, TemplateArgs));
1487 if (!VD)
1488 return ExprError();
1489 } else {
1490 // Propagate NULL template argument.
1491 VD = nullptr;
1492 }
1493
1494 // Derive the type we want the substituted decl to have. This had
1495 // better be non-dependent, or these checks will have serious problems.
1496 if (parm->isExpandedParameterPack()) {
1497 type = parm->getExpansionType(SemaRef.ArgumentPackSubstitutionIndex);
1498 } else if (parm->isParameterPack() &&
1499 isa<PackExpansionType>(parm->getType())) {
1500 type = SemaRef.SubstType(
1501 cast<PackExpansionType>(parm->getType())->getPattern(),
1502 TemplateArgs, loc, parm->getDeclName());
1503 } else {
1504 type = SemaRef.SubstType(VD ? arg.getParamTypeForDecl() : arg.getNullPtrType(),
1505 TemplateArgs, loc, parm->getDeclName());
1506 }
1507 assert(!type.isNull() && "type substitution failed for param type")((!type.isNull() && "type substitution failed for param type"
) ? static_cast<void> (0) : __assert_fail ("!type.isNull() && \"type substitution failed for param type\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1507, __PRETTY_FUNCTION__))
;
1508 assert(!type->isDependentType() && "param type still dependent")((!type->isDependentType() && "param type still dependent"
) ? static_cast<void> (0) : __assert_fail ("!type->isDependentType() && \"param type still dependent\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1508, __PRETTY_FUNCTION__))
;
1509 result = SemaRef.BuildExpressionFromDeclTemplateArgument(arg, type, loc);
1510
1511 if (!result.isInvalid()) type = result.get()->getType();
1512 } else {
1513 result = SemaRef.BuildExpressionFromIntegralTemplateArgument(arg, loc);
1514
1515 // Note that this type can be different from the type of 'result',
1516 // e.g. if it's an enum type.
1517 type = arg.getIntegralType();
1518 }
1519 if (result.isInvalid()) return ExprError();
1520
1521 Expr *resultExpr = result.get();
1522 return new (SemaRef.Context) SubstNonTypeTemplateParmExpr(
1523 type, resultExpr->getValueKind(), loc, parm, resultExpr);
1524}
1525
1526ExprResult
1527TemplateInstantiator::TransformSubstNonTypeTemplateParmPackExpr(
1528 SubstNonTypeTemplateParmPackExpr *E) {
1529 if (getSema().ArgumentPackSubstitutionIndex == -1) {
1530 // We aren't expanding the parameter pack, so just return ourselves.
1531 return E;
1532 }
1533
1534 TemplateArgument Arg = E->getArgumentPack();
1535 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1536 return transformNonTypeTemplateParmRef(E->getParameterPack(),
1537 E->getParameterPackLocation(),
1538 Arg);
1539}
1540
1541ExprResult
1542TemplateInstantiator::TransformSubstNonTypeTemplateParmExpr(
1543 SubstNonTypeTemplateParmExpr *E) {
1544 ExprResult SubstReplacement = TransformExpr(E->getReplacement());
1545 if (SubstReplacement.isInvalid())
1546 return true;
1547 QualType SubstType = TransformType(E->getType());
1548 if (SubstType.isNull())
1549 return true;
1550 // The type may have been previously dependent and not now, which means we
1551 // might have to implicit cast the argument to the new type, for example:
1552 // template<auto T, decltype(T) U>
1553 // concept C = sizeof(U) == 4;
1554 // void foo() requires C<2, 'a'> { }
1555 // When normalizing foo(), we first form the normalized constraints of C:
1556 // AtomicExpr(sizeof(U) == 4,
1557 // U=SubstNonTypeTemplateParmExpr(Param=U,
1558 // Expr=DeclRef(U),
1559 // Type=decltype(T)))
1560 // Then we substitute T = 2, U = 'a' into the parameter mapping, and need to
1561 // produce:
1562 // AtomicExpr(sizeof(U) == 4,
1563 // U=SubstNonTypeTemplateParmExpr(Param=U,
1564 // Expr=ImpCast(
1565 // decltype(2),
1566 // SubstNTTPE(Param=U, Expr='a',
1567 // Type=char)),
1568 // Type=decltype(2)))
1569 // The call to CheckTemplateArgument here produces the ImpCast.
1570 TemplateArgument Converted;
1571 if (SemaRef.CheckTemplateArgument(E->getParameter(), SubstType,
1572 SubstReplacement.get(),
1573 Converted).isInvalid())
1574 return true;
1575 return transformNonTypeTemplateParmRef(E->getParameter(),
1576 E->getExprLoc(), Converted);
1577}
1578
1579ExprResult TemplateInstantiator::RebuildVarDeclRefExpr(VarDecl *PD,
1580 SourceLocation Loc) {
1581 DeclarationNameInfo NameInfo(PD->getDeclName(), Loc);
1582 return getSema().BuildDeclarationNameExpr(CXXScopeSpec(), NameInfo, PD);
1583}
1584
1585ExprResult
1586TemplateInstantiator::TransformFunctionParmPackExpr(FunctionParmPackExpr *E) {
1587 if (getSema().ArgumentPackSubstitutionIndex != -1) {
1588 // We can expand this parameter pack now.
1589 VarDecl *D = E->getExpansion(getSema().ArgumentPackSubstitutionIndex);
1590 VarDecl *VD = cast_or_null<VarDecl>(TransformDecl(E->getExprLoc(), D));
1591 if (!VD)
1592 return ExprError();
1593 return RebuildVarDeclRefExpr(VD, E->getExprLoc());
1594 }
1595
1596 QualType T = TransformType(E->getType());
1597 if (T.isNull())
1598 return ExprError();
1599
1600 // Transform each of the parameter expansions into the corresponding
1601 // parameters in the instantiation of the function decl.
1602 SmallVector<VarDecl *, 8> Vars;
1603 Vars.reserve(E->getNumExpansions());
1604 for (FunctionParmPackExpr::iterator I = E->begin(), End = E->end();
1605 I != End; ++I) {
1606 VarDecl *D = cast_or_null<VarDecl>(TransformDecl(E->getExprLoc(), *I));
1607 if (!D)
1608 return ExprError();
1609 Vars.push_back(D);
1610 }
1611
1612 auto *PackExpr =
1613 FunctionParmPackExpr::Create(getSema().Context, T, E->getParameterPack(),
1614 E->getParameterPackLocation(), Vars);
1615 getSema().MarkFunctionParmPackReferenced(PackExpr);
1616 return PackExpr;
1617}
1618
1619ExprResult
1620TemplateInstantiator::TransformFunctionParmPackRefExpr(DeclRefExpr *E,
1621 VarDecl *PD) {
1622 typedef LocalInstantiationScope::DeclArgumentPack DeclArgumentPack;
1623 llvm::PointerUnion<Decl *, DeclArgumentPack *> *Found
1624 = getSema().CurrentInstantiationScope->findInstantiationOf(PD);
1625 assert(Found && "no instantiation for parameter pack")((Found && "no instantiation for parameter pack") ? static_cast
<void> (0) : __assert_fail ("Found && \"no instantiation for parameter pack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1625, __PRETTY_FUNCTION__))
;
1626
1627 Decl *TransformedDecl;
1628 if (DeclArgumentPack *Pack = Found->dyn_cast<DeclArgumentPack *>()) {
1629 // If this is a reference to a function parameter pack which we can
1630 // substitute but can't yet expand, build a FunctionParmPackExpr for it.
1631 if (getSema().ArgumentPackSubstitutionIndex == -1) {
1632 QualType T = TransformType(E->getType());
1633 if (T.isNull())
1634 return ExprError();
1635 auto *PackExpr = FunctionParmPackExpr::Create(getSema().Context, T, PD,
1636 E->getExprLoc(), *Pack);
1637 getSema().MarkFunctionParmPackReferenced(PackExpr);
1638 return PackExpr;
1639 }
1640
1641 TransformedDecl = (*Pack)[getSema().ArgumentPackSubstitutionIndex];
1642 } else {
1643 TransformedDecl = Found->get<Decl*>();
1644 }
1645
1646 // We have either an unexpanded pack or a specific expansion.
1647 return RebuildVarDeclRefExpr(cast<VarDecl>(TransformedDecl), E->getExprLoc());
1648}
1649
1650ExprResult
1651TemplateInstantiator::TransformDeclRefExpr(DeclRefExpr *E) {
1652 NamedDecl *D = E->getDecl();
1653
1654 // Handle references to non-type template parameters and non-type template
1655 // parameter packs.
1656 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(D)) {
1657 if (NTTP->getDepth() < TemplateArgs.getNumLevels())
1658 return TransformTemplateParmRefExpr(E, NTTP);
1659
1660 // We have a non-type template parameter that isn't fully substituted;
1661 // FindInstantiatedDecl will find it in the local instantiation scope.
1662 }
1663
1664 // Handle references to function parameter packs.
1665 if (VarDecl *PD = dyn_cast<VarDecl>(D))
1666 if (PD->isParameterPack())
1667 return TransformFunctionParmPackRefExpr(E, PD);
1668
1669 return TreeTransform<TemplateInstantiator>::TransformDeclRefExpr(E);
1670}
1671
1672ExprResult TemplateInstantiator::TransformCXXDefaultArgExpr(
1673 CXXDefaultArgExpr *E) {
1674 assert(!cast<FunctionDecl>(E->getParam()->getDeclContext())->((!cast<FunctionDecl>(E->getParam()->getDeclContext
())-> getDescribedFunctionTemplate() && "Default arg expressions are never formed in dependent cases."
) ? static_cast<void> (0) : __assert_fail ("!cast<FunctionDecl>(E->getParam()->getDeclContext())-> getDescribedFunctionTemplate() && \"Default arg expressions are never formed in dependent cases.\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1676, __PRETTY_FUNCTION__))
1675 getDescribedFunctionTemplate() &&((!cast<FunctionDecl>(E->getParam()->getDeclContext
())-> getDescribedFunctionTemplate() && "Default arg expressions are never formed in dependent cases."
) ? static_cast<void> (0) : __assert_fail ("!cast<FunctionDecl>(E->getParam()->getDeclContext())-> getDescribedFunctionTemplate() && \"Default arg expressions are never formed in dependent cases.\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1676, __PRETTY_FUNCTION__))
1676 "Default arg expressions are never formed in dependent cases.")((!cast<FunctionDecl>(E->getParam()->getDeclContext
())-> getDescribedFunctionTemplate() && "Default arg expressions are never formed in dependent cases."
) ? static_cast<void> (0) : __assert_fail ("!cast<FunctionDecl>(E->getParam()->getDeclContext())-> getDescribedFunctionTemplate() && \"Default arg expressions are never formed in dependent cases.\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1676, __PRETTY_FUNCTION__))
;
1677 return SemaRef.BuildCXXDefaultArgExpr(E->getUsedLocation(),
1678 cast<FunctionDecl>(E->getParam()->getDeclContext()),
1679 E->getParam());
1680}
1681
1682template<typename Fn>
1683QualType TemplateInstantiator::TransformFunctionProtoType(TypeLocBuilder &TLB,
1684 FunctionProtoTypeLoc TL,
1685 CXXRecordDecl *ThisContext,
1686 Qualifiers ThisTypeQuals,
1687 Fn TransformExceptionSpec) {
1688 // We need a local instantiation scope for this function prototype.
1689 LocalInstantiationScope Scope(SemaRef, /*CombineWithOuterScope=*/true);
1690 return inherited::TransformFunctionProtoType(
1691 TLB, TL, ThisContext, ThisTypeQuals, TransformExceptionSpec);
1692}
1693
1694ParmVarDecl *
1695TemplateInstantiator::TransformFunctionTypeParam(ParmVarDecl *OldParm,
1696 int indexAdjustment,
1697 Optional<unsigned> NumExpansions,
1698 bool ExpectParameterPack) {
1699 auto NewParm =
1700 SemaRef.SubstParmVarDecl(OldParm, TemplateArgs, indexAdjustment,
1701 NumExpansions, ExpectParameterPack);
1702 if (NewParm && SemaRef.getLangOpts().OpenCL)
1703 SemaRef.deduceOpenCLAddressSpace(NewParm);
1704 return NewParm;
1705}
1706
1707QualType
1708TemplateInstantiator::TransformTemplateTypeParmType(TypeLocBuilder &TLB,
1709 TemplateTypeParmTypeLoc TL) {
1710 const TemplateTypeParmType *T = TL.getTypePtr();
1711 if (T->getDepth() < TemplateArgs.getNumLevels()) {
1712 // Replace the template type parameter with its corresponding
1713 // template argument.
1714
1715 // If the corresponding template argument is NULL or doesn't exist, it's
1716 // because we are performing instantiation from explicitly-specified
1717 // template arguments in a function template class, but there were some
1718 // arguments left unspecified.
1719 if (!TemplateArgs.hasTemplateArgument(T->getDepth(), T->getIndex())) {
1720 TemplateTypeParmTypeLoc NewTL
1721 = TLB.push<TemplateTypeParmTypeLoc>(TL.getType());
1722 NewTL.setNameLoc(TL.getNameLoc());
1723 return TL.getType();
1724 }
1725
1726 TemplateArgument Arg = TemplateArgs(T->getDepth(), T->getIndex());
1727
1728 if (T->isParameterPack()) {
1729 assert(Arg.getKind() == TemplateArgument::Pack &&((Arg.getKind() == TemplateArgument::Pack && "Missing argument pack"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Pack && \"Missing argument pack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1730, __PRETTY_FUNCTION__))
1730 "Missing argument pack")((Arg.getKind() == TemplateArgument::Pack && "Missing argument pack"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Pack && \"Missing argument pack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1730, __PRETTY_FUNCTION__))
;
1731
1732 if (getSema().ArgumentPackSubstitutionIndex == -1) {
1733 // We have the template argument pack, but we're not expanding the
1734 // enclosing pack expansion yet. Just save the template argument
1735 // pack for later substitution.
1736 QualType Result
1737 = getSema().Context.getSubstTemplateTypeParmPackType(T, Arg);
1738 SubstTemplateTypeParmPackTypeLoc NewTL
1739 = TLB.push<SubstTemplateTypeParmPackTypeLoc>(Result);
1740 NewTL.setNameLoc(TL.getNameLoc());
1741 return Result;
1742 }
1743
1744 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1745 }
1746
1747 assert(Arg.getKind() == TemplateArgument::Type &&((Arg.getKind() == TemplateArgument::Type && "Template argument kind mismatch"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Type && \"Template argument kind mismatch\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1748, __PRETTY_FUNCTION__))
1748 "Template argument kind mismatch")((Arg.getKind() == TemplateArgument::Type && "Template argument kind mismatch"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Type && \"Template argument kind mismatch\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1748, __PRETTY_FUNCTION__))
;
1749
1750 QualType Replacement = Arg.getAsType();
1751
1752 // TODO: only do this uniquing once, at the start of instantiation.
1753 QualType Result
1754 = getSema().Context.getSubstTemplateTypeParmType(T, Replacement);
1755 SubstTemplateTypeParmTypeLoc NewTL
1756 = TLB.push<SubstTemplateTypeParmTypeLoc>(Result);
1757 NewTL.setNameLoc(TL.getNameLoc());
1758 return Result;
1759 }
1760
1761 // The template type parameter comes from an inner template (e.g.,
1762 // the template parameter list of a member template inside the
1763 // template we are instantiating). Create a new template type
1764 // parameter with the template "level" reduced by one.
1765 TemplateTypeParmDecl *NewTTPDecl = nullptr;
1766 if (TemplateTypeParmDecl *OldTTPDecl = T->getDecl())
1767 NewTTPDecl = cast_or_null<TemplateTypeParmDecl>(
1768 TransformDecl(TL.getNameLoc(), OldTTPDecl));
1769
1770 QualType Result = getSema().Context.getTemplateTypeParmType(
1771 T->getDepth() - TemplateArgs.getNumSubstitutedLevels(), T->getIndex(),
1772 T->isParameterPack(), NewTTPDecl);
1773 TemplateTypeParmTypeLoc NewTL = TLB.push<TemplateTypeParmTypeLoc>(Result);
1774 NewTL.setNameLoc(TL.getNameLoc());
1775 return Result;
1776}
1777
1778QualType
1779TemplateInstantiator::TransformSubstTemplateTypeParmPackType(
1780 TypeLocBuilder &TLB,
1781 SubstTemplateTypeParmPackTypeLoc TL) {
1782 if (getSema().ArgumentPackSubstitutionIndex == -1) {
1783 // We aren't expanding the parameter pack, so just return ourselves.
1784 SubstTemplateTypeParmPackTypeLoc NewTL
1785 = TLB.push<SubstTemplateTypeParmPackTypeLoc>(TL.getType());
1786 NewTL.setNameLoc(TL.getNameLoc());
1787 return TL.getType();
1788 }
1789
1790 TemplateArgument Arg = TL.getTypePtr()->getArgumentPack();
1791 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1792 QualType Result = Arg.getAsType();
1793
1794 Result = getSema().Context.getSubstTemplateTypeParmType(
1795 TL.getTypePtr()->getReplacedParameter(),
1796 Result);
1797 SubstTemplateTypeParmTypeLoc NewTL
1798 = TLB.push<SubstTemplateTypeParmTypeLoc>(Result);
1799 NewTL.setNameLoc(TL.getNameLoc());
1800 return Result;
1801}
1802
1803template<typename EntityPrinter>
1804static concepts::Requirement::SubstitutionDiagnostic *
1805createSubstDiag(Sema &S, TemplateDeductionInfo &Info, EntityPrinter Printer) {
1806 SmallString<128> Message;
1807 SourceLocation ErrorLoc;
1808 if (Info.hasSFINAEDiagnostic()) {
1809 PartialDiagnosticAt PDA(SourceLocation(),
1810 PartialDiagnostic::NullDiagnostic{});
1811 Info.takeSFINAEDiagnostic(PDA);
1812 PDA.second.EmitToString(S.getDiagnostics(), Message);
1813 ErrorLoc = PDA.first;
1814 } else {
1815 ErrorLoc = Info.getLocation();
1816 }
1817 char *MessageBuf = new (S.Context) char[Message.size()];
1818 std::copy(Message.begin(), Message.end(), MessageBuf);
1819 SmallString<128> Entity;
1820 llvm::raw_svector_ostream OS(Entity);
1821 Printer(OS);
1822 char *EntityBuf = new (S.Context) char[Entity.size()];
1823 std::copy(Entity.begin(), Entity.end(), EntityBuf);
1824 return new (S.Context) concepts::Requirement::SubstitutionDiagnostic{
1825 StringRef(EntityBuf, Entity.size()), ErrorLoc,
1826 StringRef(MessageBuf, Message.size())};
1827}
1828
1829concepts::TypeRequirement *
1830TemplateInstantiator::TransformTypeRequirement(concepts::TypeRequirement *Req) {
1831 if (!Req->isDependent() && !AlwaysRebuild())
1832 return Req;
1833 if (Req->isSubstitutionFailure()) {
1834 if (AlwaysRebuild())
1835 return RebuildTypeRequirement(
1836 Req->getSubstitutionDiagnostic());
1837 return Req;
1838 }
1839
1840 Sema::SFINAETrap Trap(SemaRef);
1841 TemplateDeductionInfo Info(Req->getType()->getTypeLoc().getBeginLoc());
1842 Sema::InstantiatingTemplate TypeInst(SemaRef,
1843 Req->getType()->getTypeLoc().getBeginLoc(), Req, Info,
1844 Req->getType()->getTypeLoc().getSourceRange());
1845 if (TypeInst.isInvalid())
1846 return nullptr;
1847 TypeSourceInfo *TransType = TransformType(Req->getType());
1848 if (!TransType || Trap.hasErrorOccurred())
1849 return RebuildTypeRequirement(createSubstDiag(SemaRef, Info,
1850 [&] (llvm::raw_ostream& OS) {
1851 Req->getType()->getType().print(OS, SemaRef.getPrintingPolicy());
1852 }));
1853 return RebuildTypeRequirement(TransType);
1854}
1855
1856concepts::ExprRequirement *
1857TemplateInstantiator::TransformExprRequirement(concepts::ExprRequirement *Req) {
1858 if (!Req->isDependent() && !AlwaysRebuild())
1859 return Req;
1860
1861 Sema::SFINAETrap Trap(SemaRef);
1862 TemplateDeductionInfo Info(Req->getExpr()->getBeginLoc());
1863
1864 llvm::PointerUnion<Expr *, concepts::Requirement::SubstitutionDiagnostic *>
1865 TransExpr;
1866 if (Req->isExprSubstitutionFailure())
1867 TransExpr = Req->getExprSubstitutionDiagnostic();
1868 else {
1869 Sema::InstantiatingTemplate ExprInst(SemaRef, Req->getExpr()->getBeginLoc(),
1870 Req, Info,
1871 Req->getExpr()->getSourceRange());
1872 if (ExprInst.isInvalid())
1873 return nullptr;
1874 ExprResult TransExprRes = TransformExpr(Req->getExpr());
1875 if (TransExprRes.isInvalid() || Trap.hasErrorOccurred())
1876 TransExpr = createSubstDiag(SemaRef, Info,
1877 [&] (llvm::raw_ostream& OS) {
1878 Req->getExpr()->printPretty(OS, nullptr,
1879 SemaRef.getPrintingPolicy());
1880 });
1881 else
1882 TransExpr = TransExprRes.get();
1883 }
1884
1885 llvm::Optional<concepts::ExprRequirement::ReturnTypeRequirement> TransRetReq;
1886 const auto &RetReq = Req->getReturnTypeRequirement();
1887 if (RetReq.isEmpty())
1888 TransRetReq.emplace();
1889 else if (RetReq.isSubstitutionFailure())
1890 TransRetReq.emplace(RetReq.getSubstitutionDiagnostic());
1891 else if (RetReq.isTypeConstraint()) {
1892 TemplateParameterList *OrigTPL =
1893 RetReq.getTypeConstraintTemplateParameterList();
1894 Sema::InstantiatingTemplate TPLInst(SemaRef, OrigTPL->getTemplateLoc(),
1895 Req, Info, OrigTPL->getSourceRange());
1896 if (TPLInst.isInvalid())
1897 return nullptr;
1898 TemplateParameterList *TPL =
1899 TransformTemplateParameterList(OrigTPL);
1900 if (!TPL)
1901 TransRetReq.emplace(createSubstDiag(SemaRef, Info,
1902 [&] (llvm::raw_ostream& OS) {
1903 RetReq.getTypeConstraint()->getImmediatelyDeclaredConstraint()
1904 ->printPretty(OS, nullptr, SemaRef.getPrintingPolicy());
1905 }));
1906 else {
1907 TPLInst.Clear();
1908 TransRetReq.emplace(TPL);
1909 }
1910 }
1911 assert(TransRetReq.hasValue() &&((TransRetReq.hasValue() && "All code paths leading here must set TransRetReq"
) ? static_cast<void> (0) : __assert_fail ("TransRetReq.hasValue() && \"All code paths leading here must set TransRetReq\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1912, __PRETTY_FUNCTION__))
1912 "All code paths leading here must set TransRetReq")((TransRetReq.hasValue() && "All code paths leading here must set TransRetReq"
) ? static_cast<void> (0) : __assert_fail ("TransRetReq.hasValue() && \"All code paths leading here must set TransRetReq\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1912, __PRETTY_FUNCTION__))
;
1913 if (Expr *E = TransExpr.dyn_cast<Expr *>())
1914 return RebuildExprRequirement(E, Req->isSimple(), Req->getNoexceptLoc(),
1915 std::move(*TransRetReq));
1916 return RebuildExprRequirement(
1917 TransExpr.get<concepts::Requirement::SubstitutionDiagnostic *>(),
1918 Req->isSimple(), Req->getNoexceptLoc(), std::move(*TransRetReq));
1919}
1920
1921concepts::NestedRequirement *
1922TemplateInstantiator::TransformNestedRequirement(
1923 concepts::NestedRequirement *Req) {
1924 if (!Req->isDependent() && !AlwaysRebuild())
1925 return Req;
1926 if (Req->isSubstitutionFailure()) {
1927 if (AlwaysRebuild())
1928 return RebuildNestedRequirement(
1929 Req->getSubstitutionDiagnostic());
1930 return Req;
1931 }
1932 Sema::InstantiatingTemplate ReqInst(SemaRef,
1933 Req->getConstraintExpr()->getBeginLoc(), Req,
1934 Sema::InstantiatingTemplate::ConstraintsCheck{},
1935 Req->getConstraintExpr()->getSourceRange());
1936
1937 ExprResult TransConstraint;
1938 TemplateDeductionInfo Info(Req->getConstraintExpr()->getBeginLoc());
1939 {
1940 EnterExpressionEvaluationContext ContextRAII(
1941 SemaRef, Sema::ExpressionEvaluationContext::ConstantEvaluated);
1942 Sema::SFINAETrap Trap(SemaRef);
1943 Sema::InstantiatingTemplate ConstrInst(SemaRef,
1944 Req->getConstraintExpr()->getBeginLoc(), Req, Info,
1945 Req->getConstraintExpr()->getSourceRange());
1946 if (ConstrInst.isInvalid())
1947 return nullptr;
1948 TransConstraint = TransformExpr(Req->getConstraintExpr());
1949 if (TransConstraint.isInvalid() || Trap.hasErrorOccurred())
1950 return RebuildNestedRequirement(createSubstDiag(SemaRef, Info,
1951 [&] (llvm::raw_ostream& OS) {
1952 Req->getConstraintExpr()->printPretty(OS, nullptr,
1953 SemaRef.getPrintingPolicy());
1954 }));
1955 }
1956 return RebuildNestedRequirement(TransConstraint.get());
1957}
1958
1959
1960/// Perform substitution on the type T with a given set of template
1961/// arguments.
1962///
1963/// This routine substitutes the given template arguments into the
1964/// type T and produces the instantiated type.
1965///
1966/// \param T the type into which the template arguments will be
1967/// substituted. If this type is not dependent, it will be returned
1968/// immediately.
1969///
1970/// \param Args the template arguments that will be
1971/// substituted for the top-level template parameters within T.
1972///
1973/// \param Loc the location in the source code where this substitution
1974/// is being performed. It will typically be the location of the
1975/// declarator (if we're instantiating the type of some declaration)
1976/// or the location of the type in the source code (if, e.g., we're
1977/// instantiating the type of a cast expression).
1978///
1979/// \param Entity the name of the entity associated with a declaration
1980/// being instantiated (if any). May be empty to indicate that there
1981/// is no such entity (if, e.g., this is a type that occurs as part of
1982/// a cast expression) or that the entity has no name (e.g., an
1983/// unnamed function parameter).
1984///
1985/// \param AllowDeducedTST Whether a DeducedTemplateSpecializationType is
1986/// acceptable as the top level type of the result.
1987///
1988/// \returns If the instantiation succeeds, the instantiated
1989/// type. Otherwise, produces diagnostics and returns a NULL type.
1990TypeSourceInfo *Sema::SubstType(TypeSourceInfo *T,
1991 const MultiLevelTemplateArgumentList &Args,
1992 SourceLocation Loc,
1993 DeclarationName Entity,
1994 bool AllowDeducedTST) {
1995 assert(!CodeSynthesisContexts.empty() &&((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1997, __PRETTY_FUNCTION__))
1996 "Cannot perform an instantiation without some context on the "((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1997, __PRETTY_FUNCTION__))
1997 "instantiation stack")((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1997, __PRETTY_FUNCTION__))
;
1998
1999 if (!T->getType()->isInstantiationDependentType() &&
2000 !T->getType()->isVariablyModifiedType())
2001 return T;
2002
2003 TemplateInstantiator Instantiator(*this, Args, Loc, Entity);
2004 return AllowDeducedTST ? Instantiator.TransformTypeWithDeducedTST(T)
2005 : Instantiator.TransformType(T);
2006}
2007
2008TypeSourceInfo *Sema::SubstType(TypeLoc TL,
2009 const MultiLevelTemplateArgumentList &Args,
2010 SourceLocation Loc,
2011 DeclarationName Entity) {
2012 assert(!CodeSynthesisContexts.empty() &&((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2014, __PRETTY_FUNCTION__))
2013 "Cannot perform an instantiation without some context on the "((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2014, __PRETTY_FUNCTION__))
2014 "instantiation stack")((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2014, __PRETTY_FUNCTION__))
;
2015
2016 if (TL.getType().isNull())
2017 return nullptr;
2018
2019 if (!TL.getType()->isInstantiationDependentType() &&
2020 !TL.getType()->isVariablyModifiedType()) {
2021 // FIXME: Make a copy of the TypeLoc data here, so that we can
2022 // return a new TypeSourceInfo. Inefficient!
2023 TypeLocBuilder TLB;
2024 TLB.pushFullCopy(TL);
2025 return TLB.getTypeSourceInfo(Context, TL.getType());
2026 }
2027
2028 TemplateInstantiator Instantiator(*this, Args, Loc, Entity);
2029 TypeLocBuilder TLB;
2030 TLB.reserve(TL.getFullDataSize());
2031 QualType Result = Instantiator.TransformType(TLB, TL);
2032 if (Result.isNull())
2033 return nullptr;
2034
2035 return TLB.getTypeSourceInfo(Context, Result);
2036}
2037
2038/// Deprecated form of the above.
2039QualType Sema::SubstType(QualType T,
2040 const MultiLevelTemplateArgumentList &TemplateArgs,
2041 SourceLocation Loc, DeclarationName Entity) {
2042 assert(!CodeSynthesisContexts.empty() &&((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2044, __PRETTY_FUNCTION__))
2043 "Cannot perform an instantiation without some context on the "((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2044, __PRETTY_FUNCTION__))
2044 "instantiation stack")((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2044, __PRETTY_FUNCTION__))
;
2045
2046 // If T is not a dependent type or a variably-modified type, there
2047 // is nothing to do.
2048 if (!T->isInstantiationDependentType() && !T->isVariablyModifiedType())
2049 return T;
2050
2051 TemplateInstantiator Instantiator(*this, TemplateArgs, Loc, Entity);
2052 return Instantiator.TransformType(T);
2053}
2054
2055static bool NeedsInstantiationAsFunctionType(TypeSourceInfo *T) {
2056 if (T->getType()->isInstantiationDependentType() ||
2057 T->getType()->isVariablyModifiedType())
2058 return true;
2059
2060 TypeLoc TL = T->getTypeLoc().IgnoreParens();
2061 if (!TL.getAs<FunctionProtoTypeLoc>())
2062 return false;
2063
2064 FunctionProtoTypeLoc FP = TL.castAs<FunctionProtoTypeLoc>();
2065 for (ParmVarDecl *P : FP.getParams()) {
2066 // This must be synthesized from a typedef.
2067 if (!P) continue;
2068
2069 // If there are any parameters, a new TypeSourceInfo that refers to the
2070 // instantiated parameters must be built.
2071 return true;
2072 }
2073
2074 return false;
2075}
2076
2077/// A form of SubstType intended specifically for instantiating the
2078/// type of a FunctionDecl. Its purpose is solely to force the
2079/// instantiation of default-argument expressions and to avoid
2080/// instantiating an exception-specification.
2081TypeSourceInfo *Sema::SubstFunctionDeclType(TypeSourceInfo *T,
2082 const MultiLevelTemplateArgumentList &Args,
2083 SourceLocation Loc,
2084 DeclarationName Entity,
2085 CXXRecordDecl *ThisContext,
2086 Qualifiers ThisTypeQuals) {
2087 assert(!CodeSynthesisContexts.empty() &&((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2089, __PRETTY_FUNCTION__))
2088 "Cannot perform an instantiation without some context on the "((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2089, __PRETTY_FUNCTION__))
2089 "instantiation stack")((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2089, __PRETTY_FUNCTION__))
;
2090
2091 if (!NeedsInstantiationAsFunctionType(T))
2092 return T;
2093
2094 TemplateInstantiator Instantiator(*this, Args, Loc, Entity);
2095
2096 TypeLocBuilder TLB;
2097
2098 TypeLoc TL = T->getTypeLoc();
2099 TLB.reserve(TL.getFullDataSize());
2100
2101 QualType Result;
2102
2103 if (FunctionProtoTypeLoc Proto =
2104 TL.IgnoreParens().getAs<FunctionProtoTypeLoc>()) {
2105 // Instantiate the type, other than its exception specification. The
2106 // exception specification is instantiated in InitFunctionInstantiation
2107 // once we've built the FunctionDecl.
2108 // FIXME: Set the exception specification to EST_Uninstantiated here,
2109 // instead of rebuilding the function type again later.
2110 Result = Instantiator.TransformFunctionProtoType(
2111 TLB, Proto, ThisContext, ThisTypeQuals,
2112 [](FunctionProtoType::ExceptionSpecInfo &ESI,
2113 bool &Changed) { return false; });
2114 } else {
2115 Result = Instantiator.TransformType(TLB, TL);
2116 }
2117 if (Result.isNull())
2118 return nullptr;
2119
2120 return TLB.getTypeSourceInfo(Context, Result);
2121}
2122
2123bool Sema::SubstExceptionSpec(SourceLocation Loc,
2124 FunctionProtoType::ExceptionSpecInfo &ESI,
2125 SmallVectorImpl<QualType> &ExceptionStorage,
2126 const MultiLevelTemplateArgumentList &Args) {
2127 assert(ESI.Type != EST_Uninstantiated)((ESI.Type != EST_Uninstantiated) ? static_cast<void> (
0) : __assert_fail ("ESI.Type != EST_Uninstantiated", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2127, __PRETTY_FUNCTION__))
;
2128
2129 bool Changed = false;
2130 TemplateInstantiator Instantiator(*this, Args, Loc, DeclarationName());
2131 return Instantiator.TransformExceptionSpec(Loc, ESI, ExceptionStorage,
2132 Changed);
2133}
2134
2135void Sema::SubstExceptionSpec(FunctionDecl *New, const FunctionProtoType *Proto,
2136 const MultiLevelTemplateArgumentList &Args) {
2137 FunctionProtoType::ExceptionSpecInfo ESI =
2138 Proto->getExtProtoInfo().ExceptionSpec;
2139
2140 SmallVector<QualType, 4> ExceptionStorage;
2141 if (SubstExceptionSpec(New->getTypeSourceInfo()->getTypeLoc().getEndLoc(),
2142 ESI, ExceptionStorage, Args))
2143 // On error, recover by dropping the exception specification.
2144 ESI.Type = EST_None;
2145
2146 UpdateExceptionSpec(New, ESI);
2147}
2148
2149namespace {
2150
2151 struct GetContainedInventedTypeParmVisitor :
2152 public TypeVisitor<GetContainedInventedTypeParmVisitor,
2153 TemplateTypeParmDecl *> {
2154 using TypeVisitor<GetContainedInventedTypeParmVisitor,
2155 TemplateTypeParmDecl *>::Visit;
2156
2157 TemplateTypeParmDecl *Visit(QualType T) {
2158 if (T.isNull())
2159 return nullptr;
2160 return Visit(T.getTypePtr());
2161 }
2162 // The deduced type itself.
2163 TemplateTypeParmDecl *VisitTemplateTypeParmType(
2164 const TemplateTypeParmType *T) {
2165 if (!T->getDecl() || !T->getDecl()->isImplicit())
2166 return nullptr;
2167 return T->getDecl();
2168 }
2169
2170 // Only these types can contain 'auto' types, and subsequently be replaced
2171 // by references to invented parameters.
2172
2173 TemplateTypeParmDecl *VisitElaboratedType(const ElaboratedType *T) {
2174 return Visit(T->getNamedType());
2175 }
2176
2177 TemplateTypeParmDecl *VisitPointerType(const PointerType *T) {
2178 return Visit(T->getPointeeType());
2179 }
2180
2181 TemplateTypeParmDecl *VisitBlockPointerType(const BlockPointerType *T) {
2182 return Visit(T->getPointeeType());
2183 }
2184
2185 TemplateTypeParmDecl *VisitReferenceType(const ReferenceType *T) {
2186 return Visit(T->getPointeeTypeAsWritten());
2187 }
2188
2189 TemplateTypeParmDecl *VisitMemberPointerType(const MemberPointerType *T) {
2190 return Visit(T->getPointeeType());
2191 }
2192
2193 TemplateTypeParmDecl *VisitArrayType(const ArrayType *T) {
2194 return Visit(T->getElementType());
2195 }
2196
2197 TemplateTypeParmDecl *VisitDependentSizedExtVectorType(
2198 const DependentSizedExtVectorType *T) {
2199 return Visit(T->getElementType());
2200 }
2201
2202 TemplateTypeParmDecl *VisitVectorType(const VectorType *T) {
2203 return Visit(T->getElementType());
2204 }
2205
2206 TemplateTypeParmDecl *VisitFunctionProtoType(const FunctionProtoType *T) {
2207 return VisitFunctionType(T);
2208 }
2209
2210 TemplateTypeParmDecl *VisitFunctionType(const FunctionType *T) {
2211 return Visit(T->getReturnType());
2212 }
2213
2214 TemplateTypeParmDecl *VisitParenType(const ParenType *T) {
2215 return Visit(T->getInnerType());
2216 }
2217
2218 TemplateTypeParmDecl *VisitAttributedType(const AttributedType *T) {
2219 return Visit(T->getModifiedType());
2220 }
2221
2222 TemplateTypeParmDecl *VisitMacroQualifiedType(const MacroQualifiedType *T) {
2223 return Visit(T->getUnderlyingType());
2224 }
2225
2226 TemplateTypeParmDecl *VisitAdjustedType(const AdjustedType *T) {
2227 return Visit(T->getOriginalType());
2228 }
2229
2230 TemplateTypeParmDecl *VisitPackExpansionType(const PackExpansionType *T) {
2231 return Visit(T->getPattern());
2232 }
2233 };
2234
2235} // namespace
2236
2237ParmVarDecl *Sema::SubstParmVarDecl(ParmVarDecl *OldParm,
2238 const MultiLevelTemplateArgumentList &TemplateArgs,
2239 int indexAdjustment,
2240 Optional<unsigned> NumExpansions,
2241 bool ExpectParameterPack) {
2242 TypeSourceInfo *OldDI = OldParm->getTypeSourceInfo();
2243 TypeSourceInfo *NewDI = nullptr;
2244
2245 TypeLoc OldTL = OldDI->getTypeLoc();
2246 if (PackExpansionTypeLoc ExpansionTL = OldTL.getAs<PackExpansionTypeLoc>()) {
2247
2248 // We have a function parameter pack. Substitute into the pattern of the
2249 // expansion.
2250 NewDI = SubstType(ExpansionTL.getPatternLoc(), TemplateArgs,
2251 OldParm->getLocation(), OldParm->getDeclName());
2252 if (!NewDI)
2253 return nullptr;
2254
2255 if (NewDI->getType()->containsUnexpandedParameterPack()) {
2256 // We still have unexpanded parameter packs, which means that
2257 // our function parameter is still a function parameter pack.
2258 // Therefore, make its type a pack expansion type.
2259 NewDI = CheckPackExpansion(NewDI, ExpansionTL.getEllipsisLoc(),
2260 NumExpansions);
2261 } else if (ExpectParameterPack) {
2262 // We expected to get a parameter pack but didn't (because the type
2263 // itself is not a pack expansion type), so complain. This can occur when
2264 // the substitution goes through an alias template that "loses" the
2265 // pack expansion.
2266 Diag(OldParm->getLocation(),
2267 diag::err_function_parameter_pack_without_parameter_packs)
2268 << NewDI->getType();
2269 return nullptr;
2270 }
2271 } else {
2272 NewDI = SubstType(OldDI, TemplateArgs, OldParm->getLocation(),
2273 OldParm->getDeclName());
2274 }
2275
2276 if (!NewDI)
2277 return nullptr;
2278
2279 if (NewDI->getType()->isVoidType()) {
2280 Diag(OldParm->getLocation(), diag::err_param_with_void_type);
2281 return nullptr;
2282 }
2283
2284 // In abbreviated templates, TemplateTypeParmDecls with possible
2285 // TypeConstraints are created when the parameter list is originally parsed.
2286 // The TypeConstraints can therefore reference other functions parameters in
2287 // the abbreviated function template, which is why we must instantiate them
2288 // here, when the instantiated versions of those referenced parameters are in
2289 // scope.
2290 if (TemplateTypeParmDecl *TTP =
2291 GetContainedInventedTypeParmVisitor().Visit(OldDI->getType())) {
2292 if (const TypeConstraint *TC = TTP->getTypeConstraint()) {
2293 auto *Inst = cast_or_null<TemplateTypeParmDecl>(
2294 FindInstantiatedDecl(TTP->getLocation(), TTP, TemplateArgs));
2295 // We will first get here when instantiating the abbreviated function
2296 // template's described function, but we might also get here later.
2297 // Make sure we do not instantiate the TypeConstraint more than once.
2298 if (Inst && !Inst->getTypeConstraint()) {
2299 // TODO: Concepts: do not instantiate the constraint (delayed constraint
2300 // substitution)
2301 const ASTTemplateArgumentListInfo *TemplArgInfo
2302 = TC->getTemplateArgsAsWritten();
2303 TemplateArgumentListInfo InstArgs;
2304
2305 if (TemplArgInfo) {
2306 InstArgs.setLAngleLoc(TemplArgInfo->LAngleLoc);
2307 InstArgs.setRAngleLoc(TemplArgInfo->RAngleLoc);
2308 if (Subst(TemplArgInfo->getTemplateArgs(),
2309 TemplArgInfo->NumTemplateArgs, InstArgs, TemplateArgs))
2310 return nullptr;
2311 }
2312 if (AttachTypeConstraint(
2313 TC->getNestedNameSpecifierLoc(), TC->getConceptNameInfo(),
2314 TC->getNamedConcept(), &InstArgs, Inst,
2315 TTP->isParameterPack()
2316 ? cast<CXXFoldExpr>(TC->getImmediatelyDeclaredConstraint())
2317 ->getEllipsisLoc()
2318 : SourceLocation()))
2319 return nullptr;
2320 }
2321 }
2322 }
2323
2324 ParmVarDecl *NewParm = CheckParameter(Context.getTranslationUnitDecl(),
2325 OldParm->getInnerLocStart(),
2326 OldParm->getLocation(),
2327 OldParm->getIdentifier(),
2328 NewDI->getType(), NewDI,
2329 OldParm->getStorageClass());
2330 if (!NewParm)
2331 return nullptr;
2332
2333 // Mark the (new) default argument as uninstantiated (if any).
2334 if (OldParm->hasUninstantiatedDefaultArg()) {
2335 Expr *Arg = OldParm->getUninstantiatedDefaultArg();
2336 NewParm->setUninstantiatedDefaultArg(Arg);
2337 } else if (OldParm->hasUnparsedDefaultArg()) {
2338 NewParm->setUnparsedDefaultArg();
2339 UnparsedDefaultArgInstantiations[OldParm].push_back(NewParm);
2340 } else if (Expr *Arg = OldParm->getDefaultArg()) {
2341 FunctionDecl *OwningFunc = cast<FunctionDecl>(OldParm->getDeclContext());
2342 if (OwningFunc->isLexicallyWithinFunctionOrMethod()) {
2343 // Instantiate default arguments for methods of local classes (DR1484)
2344 // and non-defining declarations.
2345 Sema::ContextRAII SavedContext(*this, OwningFunc);
2346 LocalInstantiationScope Local(*this, true);
2347 ExprResult NewArg = SubstExpr(Arg, TemplateArgs);
2348 if (NewArg.isUsable()) {
2349 // It would be nice if we still had this.
2350 SourceLocation EqualLoc = NewArg.get()->getBeginLoc();
2351 SetParamDefaultArgument(NewParm, NewArg.get(), EqualLoc);
2352 }
2353 } else {
2354 // FIXME: if we non-lazily instantiated non-dependent default args for
2355 // non-dependent parameter types we could remove a bunch of duplicate
2356 // conversion warnings for such arguments.
2357 NewParm->setUninstantiatedDefaultArg(Arg);
2358 }
2359 }
2360
2361 NewParm->setHasInheritedDefaultArg(OldParm->hasInheritedDefaultArg());
2362
2363 if (OldParm->isParameterPack() && !NewParm->isParameterPack()) {
2364 // Add the new parameter to the instantiated parameter pack.
2365 CurrentInstantiationScope->InstantiatedLocalPackArg(OldParm, NewParm);
2366 } else {
2367 // Introduce an Old -> New mapping
2368 CurrentInstantiationScope->InstantiatedLocal(OldParm, NewParm);
2369 }
2370
2371 // FIXME: OldParm may come from a FunctionProtoType, in which case CurContext
2372 // can be anything, is this right ?
2373 NewParm->setDeclContext(CurContext);
2374
2375 NewParm->setScopeInfo(OldParm->getFunctionScopeDepth(),
2376 OldParm->getFunctionScopeIndex() + indexAdjustment);
2377
2378 InstantiateAttrs(TemplateArgs, OldParm, NewParm);
2379
2380 return NewParm;
2381}
2382
2383/// Substitute the given template arguments into the given set of
2384/// parameters, producing the set of parameter types that would be generated
2385/// from such a substitution.
2386bool Sema::SubstParmTypes(
2387 SourceLocation Loc, ArrayRef<ParmVarDecl *> Params,
2388 const FunctionProtoType::ExtParameterInfo *ExtParamInfos,
2389 const MultiLevelTemplateArgumentList &TemplateArgs,
2390 SmallVectorImpl<QualType> &ParamTypes,
2391 SmallVectorImpl<ParmVarDecl *> *OutParams,
2392 ExtParameterInfoBuilder &ParamInfos) {
2393 assert(!CodeSynthesisContexts.empty() &&((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2395, __PRETTY_FUNCTION__))
2394 "Cannot perform an instantiation without some context on the "((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2395, __PRETTY_FUNCTION__))
2395 "instantiation stack")((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2395, __PRETTY_FUNCTION__))
;
2396
2397 TemplateInstantiator Instantiator(*this, TemplateArgs, Loc,
2398 DeclarationName());
2399 return Instantiator.TransformFunctionTypeParams(
2400 Loc, Params, nullptr, ExtParamInfos, ParamTypes, OutParams, ParamInfos);
2401}
2402
2403/// Perform substitution on the base class specifiers of the
2404/// given class template specialization.
2405///
2406/// Produces a diagnostic and returns true on error, returns false and
2407/// attaches the instantiated base classes to the class template
2408/// specialization if successful.
2409bool
2410Sema::SubstBaseSpecifiers(CXXRecordDecl *Instantiation,
2411 CXXRecordDecl *Pattern,
2412 const MultiLevelTemplateArgumentList &TemplateArgs) {
2413 bool Invalid = false;
2414 SmallVector<CXXBaseSpecifier*, 4> InstantiatedBases;
2415 for (const auto &Base : Pattern->bases()) {
2416 if (!Base.getType()->isDependentType()) {
2417 if (const CXXRecordDecl *RD = Base.getType()->getAsCXXRecordDecl()) {
2418 if (RD->isInvalidDecl())
2419 Instantiation->setInvalidDecl();
2420 }
2421 InstantiatedBases.push_back(new (Context) CXXBaseSpecifier(Base));
2422 continue;
2423 }
2424
2425 SourceLocation EllipsisLoc;
2426 TypeSourceInfo *BaseTypeLoc;
2427 if (Base.isPackExpansion()) {
2428 // This is a pack expansion. See whether we should expand it now, or
2429 // wait until later.
2430 SmallVector<UnexpandedParameterPack, 2> Unexpanded;
2431 collectUnexpandedParameterPacks(Base.getTypeSourceInfo()->getTypeLoc(),
2432 Unexpanded);
2433 bool ShouldExpand = false;
2434 bool RetainExpansion = false;
2435 Optional<unsigned> NumExpansions;
2436 if (CheckParameterPacksForExpansion(Base.getEllipsisLoc(),
2437 Base.getSourceRange(),
2438 Unexpanded,
2439 TemplateArgs, ShouldExpand,
2440 RetainExpansion,
2441 NumExpansions)) {
2442 Invalid = true;
2443 continue;
2444 }
2445
2446 // If we should expand this pack expansion now, do so.
2447 if (ShouldExpand) {
2448 for (unsigned I = 0; I != *NumExpansions; ++I) {
2449 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(*this, I);
2450
2451 TypeSourceInfo *BaseTypeLoc = SubstType(Base.getTypeSourceInfo(),
2452 TemplateArgs,
2453 Base.getSourceRange().getBegin(),
2454 DeclarationName());
2455 if (!BaseTypeLoc) {
2456 Invalid = true;
2457 continue;
2458 }
2459
2460 if (CXXBaseSpecifier *InstantiatedBase
2461 = CheckBaseSpecifier(Instantiation,
2462 Base.getSourceRange(),
2463 Base.isVirtual(),
2464 Base.getAccessSpecifierAsWritten(),
2465 BaseTypeLoc,
2466 SourceLocation()))
2467 InstantiatedBases.push_back(InstantiatedBase);
2468 else
2469 Invalid = true;
2470 }
2471
2472 continue;
2473 }
2474
2475 // The resulting base specifier will (still) be a pack expansion.
2476 EllipsisLoc = Base.getEllipsisLoc();
2477 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(*this, -1);
2478 BaseTypeLoc = SubstType(Base.getTypeSourceInfo(),
2479 TemplateArgs,
2480 Base.getSourceRange().getBegin(),
2481 DeclarationName());
2482 } else {
2483 BaseTypeLoc = SubstType(Base.getTypeSourceInfo(),
2484 TemplateArgs,
2485 Base.getSourceRange().getBegin(),
2486 DeclarationName());
2487 }
2488
2489 if (!BaseTypeLoc) {
2490 Invalid = true;
2491 continue;
2492 }
2493
2494 if (CXXBaseSpecifier *InstantiatedBase
2495 = CheckBaseSpecifier(Instantiation,
2496 Base.getSourceRange(),
2497 Base.isVirtual(),
2498 Base.getAccessSpecifierAsWritten(),
2499 BaseTypeLoc,
2500 EllipsisLoc))
2501 InstantiatedBases.push_back(InstantiatedBase);
2502 else
2503 Invalid = true;
2504 }
2505
2506 if (!Invalid && AttachBaseSpecifiers(Instantiation, InstantiatedBases))
2507 Invalid = true;
2508
2509 return Invalid;
2510}
2511
2512// Defined via #include from SemaTemplateInstantiateDecl.cpp
2513namespace clang {
2514 namespace sema {
2515 Attr *instantiateTemplateAttribute(const Attr *At, ASTContext &C, Sema &S,
2516 const MultiLevelTemplateArgumentList &TemplateArgs);
2517 Attr *instantiateTemplateAttributeForDecl(
2518 const Attr *At, ASTContext &C, Sema &S,
2519 const MultiLevelTemplateArgumentList &TemplateArgs);
2520 }
2521}
2522
2523/// Instantiate the definition of a class from a given pattern.
2524///
2525/// \param PointOfInstantiation The point of instantiation within the
2526/// source code.
2527///
2528/// \param Instantiation is the declaration whose definition is being
2529/// instantiated. This will be either a class template specialization
2530/// or a member class of a class template specialization.
2531///
2532/// \param Pattern is the pattern from which the instantiation
2533/// occurs. This will be either the declaration of a class template or
2534/// the declaration of a member class of a class template.
2535///
2536/// \param TemplateArgs The template arguments to be substituted into
2537/// the pattern.
2538///
2539/// \param TSK the kind of implicit or explicit instantiation to perform.
2540///
2541/// \param Complain whether to complain if the class cannot be instantiated due
2542/// to the lack of a definition.
2543///
2544/// \returns true if an error occurred, false otherwise.
2545bool
2546Sema::InstantiateClass(SourceLocation PointOfInstantiation,
2547 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern,
2548 const MultiLevelTemplateArgumentList &TemplateArgs,
2549 TemplateSpecializationKind TSK,
2550 bool Complain) {
2551 CXXRecordDecl *PatternDef
2552 = cast_or_null<CXXRecordDecl>(Pattern->getDefinition());
2553 if (DiagnoseUninstantiableTemplate(PointOfInstantiation, Instantiation,
2554 Instantiation->getInstantiatedFromMemberClass(),
2555 Pattern, PatternDef, TSK, Complain))
2556 return true;
2557
2558 llvm::TimeTraceScope TimeScope("InstantiateClass", [&]() {
2559 std::string Name;
2560 llvm::raw_string_ostream OS(Name);
2561 Instantiation->getNameForDiagnostic(OS, getPrintingPolicy(),
2562 /*Qualified=*/true);
2563 return Name;
2564 });
2565
2566 Pattern = PatternDef;
2567
2568 // Record the point of instantiation.
2569 if (MemberSpecializationInfo *MSInfo
2570 = Instantiation->getMemberSpecializationInfo()) {
2571 MSInfo->setTemplateSpecializationKind(TSK);
2572 MSInfo->setPointOfInstantiation(PointOfInstantiation);
2573 } else if (ClassTemplateSpecializationDecl *Spec
2574 = dyn_cast<ClassTemplateSpecializationDecl>(Instantiation)) {
2575 Spec->setTemplateSpecializationKind(TSK);
2576 Spec->setPointOfInstantiation(PointOfInstantiation);
2577 }
2578
2579 InstantiatingTemplate Inst(*this, PointOfInstantiation, Instantiation);
2580 if (Inst.isInvalid())
2581 return true;
2582 assert(!Inst.isAlreadyInstantiating() && "should have been caught by caller")((!Inst.isAlreadyInstantiating() && "should have been caught by caller"
) ? static_cast<void> (0) : __assert_fail ("!Inst.isAlreadyInstantiating() && \"should have been caught by caller\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2582, __PRETTY_FUNCTION__))
;
2583 PrettyDeclStackTraceEntry CrashInfo(Context, Instantiation, SourceLocation(),
2584 "instantiating class definition");
2585
2586 // Enter the scope of this instantiation. We don't use
2587 // PushDeclContext because we don't have a scope.
2588 ContextRAII SavedContext(*this, Instantiation);
2589 EnterExpressionEvaluationContext EvalContext(
2590 *this, Sema::ExpressionEvaluationContext::PotentiallyEvaluated);
2591
2592 // If this is an instantiation of a local class, merge this local
2593 // instantiation scope with the enclosing scope. Otherwise, every
2594 // instantiation of a class has its own local instantiation scope.
2595 bool MergeWithParentScope = !Instantiation->isDefinedOutsideFunctionOrMethod();
2596 LocalInstantiationScope Scope(*this, MergeWithParentScope);
2597
2598 // Some class state isn't processed immediately but delayed till class
2599 // instantiation completes. We may not be ready to handle any delayed state
2600 // already on the stack as it might correspond to a different class, so save
2601 // it now and put it back later.
2602 SavePendingParsedClassStateRAII SavedPendingParsedClassState(*this);
2603
2604 // Pull attributes from the pattern onto the instantiation.
2605 InstantiateAttrs(TemplateArgs, Pattern, Instantiation);
2606
2607 // Start the definition of this instantiation.
2608 Instantiation->startDefinition();
2609
2610 // The instantiation is visible here, even if it was first declared in an
2611 // unimported module.
2612 Instantiation->setVisibleDespiteOwningModule();
2613
2614 // FIXME: This loses the as-written tag kind for an explicit instantiation.
2615 Instantiation->setTagKind(Pattern->getTagKind());
2616
2617 // Do substitution on the base class specifiers.
2618 if (SubstBaseSpecifiers(Instantiation, Pattern, TemplateArgs))
2619 Instantiation->setInvalidDecl();
2620
2621 TemplateDeclInstantiator Instantiator(*this, Instantiation, TemplateArgs);
2622 SmallVector<Decl*, 4> Fields;
2623 // Delay instantiation of late parsed attributes.
2624 LateInstantiatedAttrVec LateAttrs;
2625 Instantiator.enableLateAttributeInstantiation(&LateAttrs);
2626
2627 bool MightHaveConstexprVirtualFunctions = false;
2628 for (auto *Member : Pattern->decls()) {
2629 // Don't instantiate members not belonging in this semantic context.
2630 // e.g. for:
2631 // @code
2632 // template <int i> class A {
2633 // class B *g;
2634 // };
2635 // @endcode
2636 // 'class B' has the template as lexical context but semantically it is
2637 // introduced in namespace scope.
2638 if (Member->getDeclContext() != Pattern)
2639 continue;
2640
2641 // BlockDecls can appear in a default-member-initializer. They must be the
2642 // child of a BlockExpr, so we only know how to instantiate them from there.
2643 if (isa<BlockDecl>(Member))
2644 continue;
2645
2646 if (Member->isInvalidDecl()) {
2647 Instantiation->setInvalidDecl();
2648 continue;
2649 }
2650
2651 Decl *NewMember = Instantiator.Visit(Member);
2652 if (NewMember) {
2653 if (FieldDecl *Field = dyn_cast<FieldDecl>(NewMember)) {
2654 Fields.push_back(Field);
2655 } else if (EnumDecl *Enum = dyn_cast<EnumDecl>(NewMember)) {
2656 // C++11 [temp.inst]p1: The implicit instantiation of a class template
2657 // specialization causes the implicit instantiation of the definitions
2658 // of unscoped member enumerations.
2659 // Record a point of instantiation for this implicit instantiation.
2660 if (TSK == TSK_ImplicitInstantiation && !Enum->isScoped() &&
2661 Enum->isCompleteDefinition()) {
2662 MemberSpecializationInfo *MSInfo =Enum->getMemberSpecializationInfo();
2663 assert(MSInfo && "no spec info for member enum specialization")((MSInfo && "no spec info for member enum specialization"
) ? static_cast<void> (0) : __assert_fail ("MSInfo && \"no spec info for member enum specialization\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2663, __PRETTY_FUNCTION__))
;
2664 MSInfo->setTemplateSpecializationKind(TSK_ImplicitInstantiation);
2665 MSInfo->setPointOfInstantiation(PointOfInstantiation);
2666 }
2667 } else if (StaticAssertDecl *SA = dyn_cast<StaticAssertDecl>(NewMember)) {
2668 if (SA->isFailed()) {
2669 // A static_assert failed. Bail out; instantiating this
2670 // class is probably not meaningful.
2671 Instantiation->setInvalidDecl();
2672 break;
2673 }
2674 } else if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(NewMember)) {
2675 if (MD->isConstexpr() && !MD->getFriendObjectKind() &&
2676 (MD->isVirtualAsWritten() || Instantiation->getNumBases()))
2677 MightHaveConstexprVirtualFunctions = true;
2678 }
2679
2680 if (NewMember->isInvalidDecl())
2681 Instantiation->setInvalidDecl();
2682 } else {
2683 // FIXME: Eventually, a NULL return will mean that one of the
2684 // instantiations was a semantic disaster, and we'll want to mark the
2685 // declaration invalid.
2686 // For now, we expect to skip some members that we can't yet handle.
2687 }
2688 }
2689
2690 // Finish checking fields.
2691 ActOnFields(nullptr, Instantiation->getLocation(), Instantiation, Fields,
2692 SourceLocation(), SourceLocation(), ParsedAttributesView());
2693 CheckCompletedCXXClass(nullptr, Instantiation);
2694
2695 // Default arguments are parsed, if not instantiated. We can go instantiate
2696 // default arg exprs for default constructors if necessary now. Unless we're
2697 // parsing a class, in which case wait until that's finished.
2698 if (ParsingClassDepth == 0)
2699 ActOnFinishCXXNonNestedClass();
2700
2701 // Instantiate late parsed attributes, and attach them to their decls.
2702 // See Sema::InstantiateAttrs
2703 for (LateInstantiatedAttrVec::iterator I = LateAttrs.begin(),
2704 E = LateAttrs.end(); I != E; ++I) {
2705 assert(CurrentInstantiationScope == Instantiator.getStartingScope())((CurrentInstantiationScope == Instantiator.getStartingScope(
)) ? static_cast<void> (0) : __assert_fail ("CurrentInstantiationScope == Instantiator.getStartingScope()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2705, __PRETTY_FUNCTION__))
;
2706 CurrentInstantiationScope = I->Scope;
2707
2708 // Allow 'this' within late-parsed attributes.
2709 NamedDecl *ND = dyn_cast<NamedDecl>(I->NewDecl);
2710 CXXRecordDecl *ThisContext =
2711 dyn_cast_or_null<CXXRecordDecl>(ND->getDeclContext());
2712 CXXThisScopeRAII ThisScope(*this, ThisContext, Qualifiers(),
2713 ND && ND->isCXXInstanceMember());
2714
2715 Attr *NewAttr =
2716 instantiateTemplateAttribute(I->TmplAttr, Context, *this, TemplateArgs);
2717 I->NewDecl->addAttr(NewAttr);
2718 LocalInstantiationScope::deleteScopes(I->Scope,
2719 Instantiator.getStartingScope());
2720 }
2721 Instantiator.disableLateAttributeInstantiation();
2722 LateAttrs.clear();
2723
2724 ActOnFinishDelayedMemberInitializers(Instantiation);
2725
2726 // FIXME: We should do something similar for explicit instantiations so they
2727 // end up in the right module.
2728 if (TSK == TSK_ImplicitInstantiation) {
2729 Instantiation->setLocation(Pattern->getLocation());
2730 Instantiation->setLocStart(Pattern->getInnerLocStart());
2731 Instantiation->setBraceRange(Pattern->getBraceRange());
2732 }
2733
2734 if (!Instantiation->isInvalidDecl()) {
2735 // Perform any dependent diagnostics from the pattern.
2736 PerformDependentDiagnostics(Pattern, TemplateArgs);
2737
2738 // Instantiate any out-of-line class template partial
2739 // specializations now.
2740 for (TemplateDeclInstantiator::delayed_partial_spec_iterator
2741 P = Instantiator.delayed_partial_spec_begin(),
2742 PEnd = Instantiator.delayed_partial_spec_end();
2743 P != PEnd; ++P) {
2744 if (!Instantiator.InstantiateClassTemplatePartialSpecialization(
2745 P->first, P->second)) {
2746 Instantiation->setInvalidDecl();
2747 break;
2748 }
2749 }
2750
2751 // Instantiate any out-of-line variable template partial
2752 // specializations now.
2753 for (TemplateDeclInstantiator::delayed_var_partial_spec_iterator
2754 P = Instantiator.delayed_var_partial_spec_begin(),
2755 PEnd = Instantiator.delayed_var_partial_spec_end();
2756 P != PEnd; ++P) {
2757 if (!Instantiator.InstantiateVarTemplatePartialSpecialization(
2758 P->first, P->second)) {
2759 Instantiation->setInvalidDecl();
2760 break;
2761 }
2762 }
2763 }
2764
2765 // Exit the scope of this instantiation.
2766 SavedContext.pop();
2767
2768 if (!Instantiation->isInvalidDecl()) {
2769 Consumer.HandleTagDeclDefinition(Instantiation);
2770
2771 // Always emit the vtable for an explicit instantiation definition
2772 // of a polymorphic class template specialization. Otherwise, eagerly
2773 // instantiate only constexpr virtual functions in preparation for their use
2774 // in constant evaluation.
2775 if (TSK == TSK_ExplicitInstantiationDefinition)
2776 MarkVTableUsed(PointOfInstantiation, Instantiation, true);
2777 else if (MightHaveConstexprVirtualFunctions)
2778 MarkVirtualMembersReferenced(PointOfInstantiation, Instantiation,
2779 /*ConstexprOnly*/ true);
2780 }
2781
2782 return Instantiation->isInvalidDecl();
2783}
2784
2785/// Instantiate the definition of an enum from a given pattern.
2786///
2787/// \param PointOfInstantiation The point of instantiation within the
2788/// source code.
2789/// \param Instantiation is the declaration whose definition is being
2790/// instantiated. This will be a member enumeration of a class
2791/// temploid specialization, or a local enumeration within a
2792/// function temploid specialization.
2793/// \param Pattern The templated declaration from which the instantiation
2794/// occurs.
2795/// \param TemplateArgs The template arguments to be substituted into
2796/// the pattern.
2797/// \param TSK The kind of implicit or explicit instantiation to perform.
2798///
2799/// \return \c true if an error occurred, \c false otherwise.
2800bool Sema::InstantiateEnum(SourceLocation PointOfInstantiation,
2801 EnumDecl *Instantiation, EnumDecl *Pattern,
2802 const MultiLevelTemplateArgumentList &TemplateArgs,
2803 TemplateSpecializationKind TSK) {
2804 EnumDecl *PatternDef = Pattern->getDefinition();
2805 if (DiagnoseUninstantiableTemplate(PointOfInstantiation, Instantiation,
2806 Instantiation->getInstantiatedFromMemberEnum(),
2807 Pattern, PatternDef, TSK,/*Complain*/true))
2808 return true;
2809 Pattern = PatternDef;
2810
2811 // Record the point of instantiation.
2812 if (MemberSpecializationInfo *MSInfo
2813 = Instantiation->getMemberSpecializationInfo()) {
2814 MSInfo->setTemplateSpecializationKind(TSK);
2815 MSInfo->setPointOfInstantiation(PointOfInstantiation);
2816 }
2817
2818 InstantiatingTemplate Inst(*this, PointOfInstantiation, Instantiation);
2819 if (Inst.isInvalid())
2820 return true;
2821 if (Inst.isAlreadyInstantiating())
2822 return false;
2823 PrettyDeclStackTraceEntry CrashInfo(Context, Instantiation, SourceLocation(),
2824 "instantiating enum definition");
2825
2826 // The instantiation is visible here, even if it was first declared in an
2827 // unimported module.
2828 Instantiation->setVisibleDespiteOwningModule();
2829
2830 // Enter the scope of this instantiation. We don't use
2831 // PushDeclContext because we don't have a scope.
2832 ContextRAII SavedContext(*this, Instantiation);
2833 EnterExpressionEvaluationContext EvalContext(
2834 *this, Sema::ExpressionEvaluationContext::PotentiallyEvaluated);
2835
2836 LocalInstantiationScope Scope(*this, /*MergeWithParentScope*/true);
2837
2838 // Pull attributes from the pattern onto the instantiation.
2839 InstantiateAttrs(TemplateArgs, Pattern, Instantiation);
2840
2841 TemplateDeclInstantiator Instantiator(*this, Instantiation, TemplateArgs);
2842 Instantiator.InstantiateEnumDefinition(Instantiation, Pattern);
2843
2844 // Exit the scope of this instantiation.
2845 SavedContext.pop();
2846
2847 return Instantiation->isInvalidDecl();
2848}
2849
2850
2851/// Instantiate the definition of a field from the given pattern.
2852///
2853/// \param PointOfInstantiation The point of instantiation within the
2854/// source code.
2855/// \param Instantiation is the declaration whose definition is being
2856/// instantiated. This will be a class of a class temploid
2857/// specialization, or a local enumeration within a function temploid
2858/// specialization.
2859/// \param Pattern The templated declaration from which the instantiation
2860/// occurs.
2861/// \param TemplateArgs The template arguments to be substituted into
2862/// the pattern.
2863///
2864/// \return \c true if an error occurred, \c false otherwise.
2865bool Sema::InstantiateInClassInitializer(
2866 SourceLocation PointOfInstantiation, FieldDecl *Instantiation,
2867 FieldDecl *Pattern, const MultiLevelTemplateArgumentList &TemplateArgs) {
2868 // If there is no initializer, we don't need to do anything.
2869 if (!Pattern->hasInClassInitializer())
2870 return false;
2871
2872 assert(Instantiation->getInClassInitStyle() ==((Instantiation->getInClassInitStyle() == Pattern->getInClassInitStyle
() && "pattern and instantiation disagree about init style"
) ? static_cast<void> (0) : __assert_fail ("Instantiation->getInClassInitStyle() == Pattern->getInClassInitStyle() && \"pattern and instantiation disagree about init style\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2874, __PRETTY_FUNCTION__))
2873 Pattern->getInClassInitStyle() &&((Instantiation->getInClassInitStyle() == Pattern->getInClassInitStyle
() && "pattern and instantiation disagree about init style"
) ? static_cast<void> (0) : __assert_fail ("Instantiation->getInClassInitStyle() == Pattern->getInClassInitStyle() && \"pattern and instantiation disagree about init style\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2874, __PRETTY_FUNCTION__))
2874 "pattern and instantiation disagree about init style")((Instantiation->getInClassInitStyle() == Pattern->getInClassInitStyle
() && "pattern and instantiation disagree about init style"
) ? static_cast<void> (0) : __assert_fail ("Instantiation->getInClassInitStyle() == Pattern->getInClassInitStyle() && \"pattern and instantiation disagree about init style\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2874, __PRETTY_FUNCTION__))
;
2875
2876 // Error out if we haven't parsed the initializer of the pattern yet because
2877 // we are waiting for the closing brace of the outer class.
2878 Expr *OldInit = Pattern->getInClassInitializer();
2879 if (!OldInit) {
2880 RecordDecl *PatternRD = Pattern->getParent();
2881 RecordDecl *OutermostClass = PatternRD->getOuterLexicalRecordContext();
2882 Diag(PointOfInstantiation,
2883 diag::err_in_class_initializer_not_yet_parsed)
2884 << OutermostClass << Pattern;
2885 Diag(Pattern->getEndLoc(), diag::note_in_class_initializer_not_yet_parsed);
2886 Instantiation->setInvalidDecl();
2887 return true;
2888 }
2889
2890 InstantiatingTemplate Inst(*this, PointOfInstantiation, Instantiation);
2891 if (Inst.isInvalid())
2892 return true;
2893 if (Inst.isAlreadyInstantiating()) {
2894 // Error out if we hit an instantiation cycle for this initializer.
2895 Diag(PointOfInstantiation, diag::err_in_class_initializer_cycle)
2896 << Instantiation;
2897 return true;
2898 }
2899 PrettyDeclStackTraceEntry CrashInfo(Context, Instantiation, SourceLocation(),
2900 "instantiating default member init");
2901
2902 // Enter the scope of this instantiation. We don't use PushDeclContext because
2903 // we don't have a scope.
2904 ContextRAII SavedContext(*this, Instantiation->getParent());
2905 EnterExpressionEvaluationContext EvalContext(
2906 *this, Sema::ExpressionEvaluationContext::PotentiallyEvaluated);
2907
2908 LocalInstantiationScope Scope(*this, true);
2909
2910 // Instantiate the initializer.
2911 ActOnStartCXXInClassMemberInitializer();
2912 CXXThisScopeRAII ThisScope(*this, Instantiation->getParent(), Qualifiers());
2913
2914 ExprResult NewInit = SubstInitializer(OldInit, TemplateArgs,
2915 /*CXXDirectInit=*/false);
2916 Expr *Init = NewInit.get();
2917 assert((!Init || !isa<ParenListExpr>(Init)) && "call-style init in class")(((!Init || !isa<ParenListExpr>(Init)) && "call-style init in class"
) ? static_cast<void> (0) : __assert_fail ("(!Init || !isa<ParenListExpr>(Init)) && \"call-style init in class\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2917, __PRETTY_FUNCTION__))
;
2918 ActOnFinishCXXInClassMemberInitializer(
2919 Instantiation, Init ? Init->getBeginLoc() : SourceLocation(), Init);
2920
2921 if (auto *L = getASTMutationListener())
2922 L->DefaultMemberInitializerInstantiated(Instantiation);
2923
2924 // Return true if the in-class initializer is still missing.
2925 return !Instantiation->getInClassInitializer();
2926}
2927
2928namespace {
2929 /// A partial specialization whose template arguments have matched
2930 /// a given template-id.
2931 struct PartialSpecMatchResult {
2932 ClassTemplatePartialSpecializationDecl *Partial;
2933 TemplateArgumentList *Args;
2934 };
2935}
2936
2937bool Sema::usesPartialOrExplicitSpecialization(
2938 SourceLocation Loc, ClassTemplateSpecializationDecl *ClassTemplateSpec) {
2939 if (ClassTemplateSpec->getTemplateSpecializationKind() ==
2940 TSK_ExplicitSpecialization)
2941 return true;
2942
2943 SmallVector<ClassTemplatePartialSpecializationDecl *, 4> PartialSpecs;
2944 ClassTemplateSpec->getSpecializedTemplate()
2945 ->getPartialSpecializations(PartialSpecs);
2946 for (unsigned I = 0, N = PartialSpecs.size(); I != N; ++I) {
2947 TemplateDeductionInfo Info(Loc);
2948 if (!DeduceTemplateArguments(PartialSpecs[I],
2949 ClassTemplateSpec->getTemplateArgs(), Info))
2950 return true;
2951 }
2952
2953 return false;
2954}
2955
2956/// Get the instantiation pattern to use to instantiate the definition of a
2957/// given ClassTemplateSpecializationDecl (either the pattern of the primary
2958/// template or of a partial specialization).
2959static CXXRecordDecl *
2960getPatternForClassTemplateSpecialization(
2961 Sema &S, SourceLocation PointOfInstantiation,
2962 ClassTemplateSpecializationDecl *ClassTemplateSpec,
2963 TemplateSpecializationKind TSK, bool Complain) {
2964 Sema::InstantiatingTemplate Inst(S, PointOfInstantiation, ClassTemplateSpec);
2965 if (Inst.isInvalid() || Inst.isAlreadyInstantiating())
2966 return nullptr;
2967
2968 llvm::PointerUnion<ClassTemplateDecl *,
2969 ClassTemplatePartialSpecializationDecl *>
2970 Specialized = ClassTemplateSpec->getSpecializedTemplateOrPartial();
2971 if (!Specialized.is<ClassTemplatePartialSpecializationDecl *>()) {
2972 // Find best matching specialization.
2973 ClassTemplateDecl *Template = ClassTemplateSpec->getSpecializedTemplate();
2974
2975 // C++ [temp.class.spec.match]p1:
2976 // When a class template is used in a context that requires an
2977 // instantiation of the class, it is necessary to determine
2978 // whether the instantiation is to be generated using the primary
2979 // template or one of the partial specializations. This is done by
2980 // matching the template arguments of the class template
2981 // specialization with the template argument lists of the partial
2982 // specializations.
2983 typedef PartialSpecMatchResult MatchResult;
2984 SmallVector<MatchResult, 4> Matched;
2985 SmallVector<ClassTemplatePartialSpecializationDecl *, 4> PartialSpecs;
2986 Template->getPartialSpecializations(PartialSpecs);
2987 TemplateSpecCandidateSet FailedCandidates(PointOfInstantiation);
2988 for (unsigned I = 0, N = PartialSpecs.size(); I != N; ++I) {
2989 ClassTemplatePartialSpecializationDecl *Partial = PartialSpecs[I];
2990 TemplateDeductionInfo Info(FailedCandidates.getLocation());
2991 if (Sema::TemplateDeductionResult Result = S.DeduceTemplateArguments(
2992 Partial, ClassTemplateSpec->getTemplateArgs(), Info)) {
2993 // Store the failed-deduction information for use in diagnostics, later.
2994 // TODO: Actually use the failed-deduction info?
2995 FailedCandidates.addCandidate().set(
2996 DeclAccessPair::make(Template, AS_public), Partial,
2997 MakeDeductionFailureInfo(S.Context, Result, Info));
2998 (void)Result;
2999 } else {
3000 Matched.push_back(PartialSpecMatchResult());
3001 Matched.back().Partial = Partial;
3002 Matched.back().Args = Info.take();
3003 }
3004 }
3005
3006 // If we're dealing with a member template where the template parameters
3007 // have been instantiated, this provides the original template parameters
3008 // from which the member template's parameters were instantiated.
3009
3010 if (Matched.size() >= 1) {
3011 SmallVectorImpl<MatchResult>::iterator Best = Matched.begin();
3012 if (Matched.size() == 1) {
3013 // -- If exactly one matching specialization is found, the
3014 // instantiation is generated from that specialization.
3015 // We don't need to do anything for this.
3016 } else {
3017 // -- If more than one matching specialization is found, the
3018 // partial order rules (14.5.4.2) are used to determine
3019 // whether one of the specializations is more specialized
3020 // than the others. If none of the specializations is more
3021 // specialized than all of the other matching
3022 // specializations, then the use of the class template is
3023 // ambiguous and the program is ill-formed.
3024 for (SmallVectorImpl<MatchResult>::iterator P = Best + 1,
3025 PEnd = Matched.end();
3026 P != PEnd; ++P) {
3027 if (S.getMoreSpecializedPartialSpecialization(
3028 P->Partial, Best->Partial, PointOfInstantiation) ==
3029 P->Partial)
3030 Best = P;
3031 }
3032
3033 // Determine if the best partial specialization is more specialized than
3034 // the others.
3035 bool Ambiguous = false;
3036 for (SmallVectorImpl<MatchResult>::iterator P = Matched.begin(),
3037 PEnd = Matched.end();
3038 P != PEnd; ++P) {
3039 if (P != Best && S.getMoreSpecializedPartialSpecialization(
3040 P->Partial, Best->Partial,
3041 PointOfInstantiation) != Best->Partial) {
3042 Ambiguous = true;
3043 break;
3044 }
3045 }
3046
3047 if (Ambiguous) {
3048 // Partial ordering did not produce a clear winner. Complain.
3049 Inst.Clear();
3050 ClassTemplateSpec->setInvalidDecl();
3051 S.Diag(PointOfInstantiation,
3052 diag::err_partial_spec_ordering_ambiguous)
3053 << ClassTemplateSpec;
3054
3055 // Print the matching partial specializations.
3056 for (SmallVectorImpl<MatchResult>::iterator P = Matched.begin(),
3057 PEnd = Matched.end();
3058 P != PEnd; ++P)
3059 S.Diag(P->Partial->getLocation(), diag::note_partial_spec_match)
3060 << S.getTemplateArgumentBindingsText(
3061 P->Partial->getTemplateParameters(), *P->Args);
3062
3063 return nullptr;
3064 }
3065 }
3066
3067 ClassTemplateSpec->setInstantiationOf(Best->Partial, Best->Args);
3068 } else {
3069 // -- If no matches are found, the instantiation is generated
3070 // from the primary template.
3071 }
3072 }
3073
3074 CXXRecordDecl *Pattern = nullptr;
3075 Specialized = ClassTemplateSpec->getSpecializedTemplateOrPartial();
3076 if (auto *PartialSpec =
3077 Specialized.dyn_cast<ClassTemplatePartialSpecializationDecl *>()) {
3078 // Instantiate using the best class template partial specialization.
3079 while (PartialSpec->getInstantiatedFromMember()) {
3080 // If we've found an explicit specialization of this class template,
3081 // stop here and use that as the pattern.
3082 if (PartialSpec->isMemberSpecialization())
3083 break;
3084
3085 PartialSpec = PartialSpec->getInstantiatedFromMember();
3086 }
3087 Pattern = PartialSpec;
3088 } else {
3089 ClassTemplateDecl *Template = ClassTemplateSpec->getSpecializedTemplate();
3090 while (Template->getInstantiatedFromMemberTemplate()) {
3091 // If we've found an explicit specialization of this class template,
3092 // stop here and use that as the pattern.
3093 if (Template->isMemberSpecialization())
3094 break;
3095
3096 Template = Template->getInstantiatedFromMemberTemplate();
3097 }
3098 Pattern = Template->getTemplatedDecl();
3099 }
3100
3101 return Pattern;
3102}
3103
3104bool Sema::InstantiateClassTemplateSpecialization(
3105 SourceLocation PointOfInstantiation,
3106 ClassTemplateSpecializationDecl *ClassTemplateSpec,
3107 TemplateSpecializationKind TSK, bool Complain) {
3108 // Perform the actual instantiation on the canonical declaration.
3109 ClassTemplateSpec = cast<ClassTemplateSpecializationDecl>(
3110 ClassTemplateSpec->getCanonicalDecl());
3111 if (ClassTemplateSpec->isInvalidDecl())
3112 return true;
3113
3114 CXXRecordDecl *Pattern = getPatternForClassTemplateSpecialization(
3115 *this, PointOfInstantiation, ClassTemplateSpec, TSK, Complain);
3116 if (!Pattern)
3117 return true;
3118
3119 return InstantiateClass(PointOfInstantiation, ClassTemplateSpec, Pattern,
3120 getTemplateInstantiationArgs(ClassTemplateSpec), TSK,
3121 Complain);
3122}
3123
3124/// Instantiates the definitions of all of the member
3125/// of the given class, which is an instantiation of a class template
3126/// or a member class of a template.
3127void
3128Sema::InstantiateClassMembers(SourceLocation PointOfInstantiation,
3129 CXXRecordDecl *Instantiation,
3130 const MultiLevelTemplateArgumentList &TemplateArgs,
3131 TemplateSpecializationKind TSK) {
3132 // FIXME: We need to notify the ASTMutationListener that we did all of these
3133 // things, in case we have an explicit instantiation definition in a PCM, a
3134 // module, or preamble, and the declaration is in an imported AST.
3135 assert((((TSK == TSK_ExplicitInstantiationDefinition || TSK == TSK_ExplicitInstantiationDeclaration
|| (TSK == TSK_ImplicitInstantiation && Instantiation
->isLocalClass())) && "Unexpected template specialization kind!"
) ? static_cast<void> (0) : __assert_fail ("(TSK == TSK_ExplicitInstantiationDefinition || TSK == TSK_ExplicitInstantiationDeclaration || (TSK == TSK_ImplicitInstantiation && Instantiation->isLocalClass())) && \"Unexpected template specialization kind!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3139, __PRETTY_FUNCTION__))
3136 (TSK == TSK_ExplicitInstantiationDefinition ||(((TSK == TSK_ExplicitInstantiationDefinition || TSK == TSK_ExplicitInstantiationDeclaration
|| (TSK == TSK_ImplicitInstantiation && Instantiation
->isLocalClass())) && "Unexpected template specialization kind!"
) ? static_cast<void> (0) : __assert_fail ("(TSK == TSK_ExplicitInstantiationDefinition || TSK == TSK_ExplicitInstantiationDeclaration || (TSK == TSK_ImplicitInstantiation && Instantiation->isLocalClass())) && \"Unexpected template specialization kind!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3139, __PRETTY_FUNCTION__))
3137 TSK == TSK_ExplicitInstantiationDeclaration ||(((TSK == TSK_ExplicitInstantiationDefinition || TSK == TSK_ExplicitInstantiationDeclaration
|| (TSK == TSK_ImplicitInstantiation && Instantiation
->isLocalClass())) && "Unexpected template specialization kind!"
) ? static_cast<void> (0) : __assert_fail ("(TSK == TSK_ExplicitInstantiationDefinition || TSK == TSK_ExplicitInstantiationDeclaration || (TSK == TSK_ImplicitInstantiation && Instantiation->isLocalClass())) && \"Unexpected template specialization kind!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3139, __PRETTY_FUNCTION__))
3138 (TSK == TSK_ImplicitInstantiation && Instantiation->isLocalClass())) &&(((TSK == TSK_ExplicitInstantiationDefinition || TSK == TSK_ExplicitInstantiationDeclaration
|| (TSK == TSK_ImplicitInstantiation && Instantiation
->isLocalClass())) && "Unexpected template specialization kind!"
) ? static_cast<void> (0) : __assert_fail ("(TSK == TSK_ExplicitInstantiationDefinition || TSK == TSK_ExplicitInstantiationDeclaration || (TSK == TSK_ImplicitInstantiation && Instantiation->isLocalClass())) && \"Unexpected template specialization kind!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3139, __PRETTY_FUNCTION__))
3139 "Unexpected template specialization kind!")(((TSK == TSK_ExplicitInstantiationDefinition || TSK == TSK_ExplicitInstantiationDeclaration
|| (TSK == TSK_ImplicitInstantiation && Instantiation
->isLocalClass())) && "Unexpected template specialization kind!"
) ? static_cast<void> (0) : __assert_fail ("(TSK == TSK_ExplicitInstantiationDefinition || TSK == TSK_ExplicitInstantiationDeclaration || (TSK == TSK_ImplicitInstantiation && Instantiation->isLocalClass())) && \"Unexpected template specialization kind!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3139, __PRETTY_FUNCTION__))
;
3140 for (auto *D : Instantiation->decls()) {
3141 bool SuppressNew = false;
3142 if (auto *Function = dyn_cast<FunctionDecl>(D)) {
3143 if (FunctionDecl *Pattern =
3144 Function->getInstantiatedFromMemberFunction()) {
3145
3146 if (Function->hasAttr<ExcludeFromExplicitInstantiationAttr>())
3147 continue;
3148
3149 MemberSpecializationInfo *MSInfo =
3150 Function->getMemberSpecializationInfo();
3151 assert(MSInfo && "No member specialization information?")((MSInfo && "No member specialization information?") ?
static_cast<void> (0) : __assert_fail ("MSInfo && \"No member specialization information?\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3151, __PRETTY_FUNCTION__))
;
3152 if (MSInfo->getTemplateSpecializationKind()
3153 == TSK_ExplicitSpecialization)
3154 continue;
3155
3156 if (CheckSpecializationInstantiationRedecl(PointOfInstantiation, TSK,
3157 Function,
3158 MSInfo->getTemplateSpecializationKind(),
3159 MSInfo->getPointOfInstantiation(),
3160 SuppressNew) ||
3161 SuppressNew)
3162 continue;
3163
3164 // C++11 [temp.explicit]p8:
3165 // An explicit instantiation definition that names a class template
3166 // specialization explicitly instantiates the class template
3167 // specialization and is only an explicit instantiation definition
3168 // of members whose definition is visible at the point of
3169 // instantiation.
3170 if (TSK == TSK_ExplicitInstantiationDefinition && !Pattern->isDefined())
3171 continue;
3172
3173 Function->setTemplateSpecializationKind(TSK, PointOfInstantiation);
3174
3175 if (Function->isDefined()) {
3176 // Let the ASTConsumer know that this function has been explicitly
3177 // instantiated now, and its linkage might have changed.
3178 Consumer.HandleTopLevelDecl(DeclGroupRef(Function));
3179 } else if (TSK == TSK_ExplicitInstantiationDefinition) {
3180 InstantiateFunctionDefinition(PointOfInstantiation, Function);
3181 } else if (TSK == TSK_ImplicitInstantiation) {
3182 PendingLocalImplicitInstantiations.push_back(
3183 std::make_pair(Function, PointOfInstantiation));
3184 }
3185 }
3186 } else if (auto *Var = dyn_cast<VarDecl>(D)) {
3187 if (isa<VarTemplateSpecializationDecl>(Var))
3188 continue;
3189
3190 if (Var->isStaticDataMember()) {
3191 if (Var->hasAttr<ExcludeFromExplicitInstantiationAttr>())
3192 continue;
3193
3194 MemberSpecializationInfo *MSInfo = Var->getMemberSpecializationInfo();
3195 assert(MSInfo && "No member specialization information?")((MSInfo && "No member specialization information?") ?
static_cast<void> (0) : __assert_fail ("MSInfo && \"No member specialization information?\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3195, __PRETTY_FUNCTION__))
;
3196 if (MSInfo->getTemplateSpecializationKind()
3197 == TSK_ExplicitSpecialization)
3198 continue;
3199
3200 if (CheckSpecializationInstantiationRedecl(PointOfInstantiation, TSK,
3201 Var,
3202 MSInfo->getTemplateSpecializationKind(),
3203 MSInfo->getPointOfInstantiation(),
3204 SuppressNew) ||
3205 SuppressNew)
3206 continue;
3207
3208 if (TSK == TSK_ExplicitInstantiationDefinition) {
3209 // C++0x [temp.explicit]p8:
3210 // An explicit instantiation definition that names a class template
3211 // specialization explicitly instantiates the class template
3212 // specialization and is only an explicit instantiation definition
3213 // of members whose definition is visible at the point of
3214 // instantiation.
3215 if (!Var->getInstantiatedFromStaticDataMember()->getDefinition())
3216 continue;
3217
3218 Var->setTemplateSpecializationKind(TSK, PointOfInstantiation);
3219 InstantiateVariableDefinition(PointOfInstantiation, Var);
3220 } else {
3221 Var->setTemplateSpecializationKind(TSK, PointOfInstantiation);
3222 }
3223 }
3224 } else if (auto *Record = dyn_cast<CXXRecordDecl>(D)) {
3225 if (Record->hasAttr<ExcludeFromExplicitInstantiationAttr>())
3226 continue;
3227
3228 // Always skip the injected-class-name, along with any
3229 // redeclarations of nested classes, since both would cause us
3230 // to try to instantiate the members of a class twice.
3231 // Skip closure types; they'll get instantiated when we instantiate
3232 // the corresponding lambda-expression.
3233 if (Record->isInjectedClassName() || Record->getPreviousDecl() ||
3234 Record->isLambda())
3235 continue;
3236
3237 MemberSpecializationInfo *MSInfo = Record->getMemberSpecializationInfo();
3238 assert(MSInfo && "No member specialization information?")((MSInfo && "No member specialization information?") ?
static_cast<void> (0) : __assert_fail ("MSInfo && \"No member specialization information?\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3238, __PRETTY_FUNCTION__))
;
3239
3240 if (MSInfo->getTemplateSpecializationKind()
3241 == TSK_ExplicitSpecialization)
3242 continue;
3243
3244 if (Context.getTargetInfo().getTriple().isOSWindows() &&
3245 TSK == TSK_ExplicitInstantiationDeclaration) {
3246 // On Windows, explicit instantiation decl of the outer class doesn't
3247 // affect the inner class. Typically extern template declarations are
3248 // used in combination with dll import/export annotations, but those
3249 // are not propagated from the outer class templates to inner classes.
3250 // Therefore, do not instantiate inner classes on this platform, so
3251 // that users don't end up with undefined symbols during linking.
3252 continue;
3253 }
3254
3255 if (CheckSpecializationInstantiationRedecl(PointOfInstantiation, TSK,
3256 Record,
3257 MSInfo->getTemplateSpecializationKind(),
3258 MSInfo->getPointOfInstantiation(),
3259 SuppressNew) ||
3260 SuppressNew)
3261 continue;
3262
3263 CXXRecordDecl *Pattern = Record->getInstantiatedFromMemberClass();
3264 assert(Pattern && "Missing instantiated-from-template information")((Pattern && "Missing instantiated-from-template information"
) ? static_cast<void> (0) : __assert_fail ("Pattern && \"Missing instantiated-from-template information\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3264, __PRETTY_FUNCTION__))
;
3265
3266 if (!Record->getDefinition()) {
3267 if (!Pattern->getDefinition()) {
3268 // C++0x [temp.explicit]p8:
3269 // An explicit instantiation definition that names a class template
3270 // specialization explicitly instantiates the class template
3271 // specialization and is only an explicit instantiation definition
3272 // of members whose definition is visible at the point of
3273 // instantiation.
3274 if (TSK == TSK_ExplicitInstantiationDeclaration) {
3275 MSInfo->setTemplateSpecializationKind(TSK);
3276 MSInfo->setPointOfInstantiation(PointOfInstantiation);
3277 }
3278
3279 continue;
3280 }
3281
3282 InstantiateClass(PointOfInstantiation, Record, Pattern,
3283 TemplateArgs,
3284 TSK);
3285 } else {
3286 if (TSK == TSK_ExplicitInstantiationDefinition &&
3287 Record->getTemplateSpecializationKind() ==
3288 TSK_ExplicitInstantiationDeclaration) {
3289 Record->setTemplateSpecializationKind(TSK);
3290 MarkVTableUsed(PointOfInstantiation, Record, true);
3291 }
3292 }
3293
3294 Pattern = cast_or_null<CXXRecordDecl>(Record->getDefinition());
3295 if (Pattern)
3296 InstantiateClassMembers(PointOfInstantiation, Pattern, TemplateArgs,
3297 TSK);
3298 } else if (auto *Enum = dyn_cast<EnumDecl>(D)) {
3299 MemberSpecializationInfo *MSInfo = Enum->getMemberSpecializationInfo();
3300 assert(MSInfo && "No member specialization information?")((MSInfo && "No member specialization information?") ?
static_cast<void> (0) : __assert_fail ("MSInfo && \"No member specialization information?\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3300, __PRETTY_FUNCTION__))
;
3301
3302 if (MSInfo->getTemplateSpecializationKind()
3303 == TSK_ExplicitSpecialization)
3304 continue;
3305
3306 if (CheckSpecializationInstantiationRedecl(
3307 PointOfInstantiation, TSK, Enum,
3308 MSInfo->getTemplateSpecializationKind(),
3309 MSInfo->getPointOfInstantiation(), SuppressNew) ||
3310 SuppressNew)
3311 continue;
3312
3313 if (Enum->getDefinition())
3314 continue;
3315
3316 EnumDecl *Pattern = Enum->getTemplateInstantiationPattern();
3317 assert(Pattern && "Missing instantiated-from-template information")((Pattern && "Missing instantiated-from-template information"
) ? static_cast<void> (0) : __assert_fail ("Pattern && \"Missing instantiated-from-template information\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3317, __PRETTY_FUNCTION__))
;
3318
3319 if (TSK == TSK_ExplicitInstantiationDefinition) {
3320 if (!Pattern->getDefinition())
3321 continue;
3322
3323 InstantiateEnum(PointOfInstantiation, Enum, Pattern, TemplateArgs, TSK);
3324 } else {
3325 MSInfo->setTemplateSpecializationKind(TSK);
3326 MSInfo->setPointOfInstantiation(PointOfInstantiation);
3327 }
3328 } else if (auto *Field = dyn_cast<FieldDecl>(D)) {
3329 // No need to instantiate in-class initializers during explicit
3330 // instantiation.
3331 if (Field->hasInClassInitializer() && TSK == TSK_ImplicitInstantiation) {
3332 CXXRecordDecl *ClassPattern =
3333 Instantiation->getTemplateInstantiationPattern();
3334 DeclContext::lookup_result Lookup =
3335 ClassPattern->lookup(Field->getDeclName());
3336 FieldDecl *Pattern = cast<FieldDecl>(Lookup.front());
3337 InstantiateInClassInitializer(PointOfInstantiation, Field, Pattern,
3338 TemplateArgs);
3339 }
3340 }
3341 }
3342}
3343
3344/// Instantiate the definitions of all of the members of the
3345/// given class template specialization, which was named as part of an
3346/// explicit instantiation.
3347void
3348Sema::InstantiateClassTemplateSpecializationMembers(
3349 SourceLocation PointOfInstantiation,
3350 ClassTemplateSpecializationDecl *ClassTemplateSpec,
3351 TemplateSpecializationKind TSK) {
3352 // C++0x [temp.explicit]p7:
3353 // An explicit instantiation that names a class template
3354 // specialization is an explicit instantion of the same kind
3355 // (declaration or definition) of each of its members (not
3356 // including members inherited from base classes) that has not
3357 // been previously explicitly specialized in the translation unit
3358 // containing the explicit instantiation, except as described
3359 // below.
3360 InstantiateClassMembers(PointOfInstantiation, ClassTemplateSpec,
3361 getTemplateInstantiationArgs(ClassTemplateSpec),
3362 TSK);
3363}
3364
3365StmtResult
3366Sema::SubstStmt(Stmt *S, const MultiLevelTemplateArgumentList &TemplateArgs) {
3367 if (!S)
3368 return S;
3369
3370 TemplateInstantiator Instantiator(*this, TemplateArgs,
3371 SourceLocation(),
3372 DeclarationName());
3373 return Instantiator.TransformStmt(S);
3374}
3375
3376bool Sema::SubstTemplateArguments(
3377 ArrayRef<TemplateArgumentLoc> Args,
3378 const MultiLevelTemplateArgumentList &TemplateArgs,
3379 TemplateArgumentListInfo &Out) {
3380 TemplateInstantiator Instantiator(*this, TemplateArgs,
3381 SourceLocation(),
3382 DeclarationName());
3383 return Instantiator.TransformTemplateArguments(Args.begin(), Args.end(),
3384 Out);
3385}
3386
3387ExprResult
3388Sema::SubstExpr(Expr *E, const MultiLevelTemplateArgumentList &TemplateArgs) {
3389 if (!E)
3390 return E;
3391
3392 TemplateInstantiator Instantiator(*this, TemplateArgs,
3393 SourceLocation(),
3394 DeclarationName());
3395 return Instantiator.TransformExpr(E);
3396}
3397
3398ExprResult Sema::SubstInitializer(Expr *Init,
3399 const MultiLevelTemplateArgumentList &TemplateArgs,
3400 bool CXXDirectInit) {
3401 TemplateInstantiator Instantiator(*this, TemplateArgs,
3402 SourceLocation(),
3403 DeclarationName());
3404 return Instantiator.TransformInitializer(Init, CXXDirectInit);
3405}
3406
3407bool Sema::SubstExprs(ArrayRef<Expr *> Exprs, bool IsCall,
3408 const MultiLevelTemplateArgumentList &TemplateArgs,
3409 SmallVectorImpl<Expr *> &Outputs) {
3410 if (Exprs.empty())
3411 return false;
3412
3413 TemplateInstantiator Instantiator(*this, TemplateArgs,
3414 SourceLocation(),
3415 DeclarationName());
3416 return Instantiator.TransformExprs(Exprs.data(), Exprs.size(),
3417 IsCall, Outputs);
3418}
3419
3420NestedNameSpecifierLoc
3421Sema::SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS,
3422 const MultiLevelTemplateArgumentList &TemplateArgs) {
3423 if (!NNS)
3424 return NestedNameSpecifierLoc();
3425
3426 TemplateInstantiator Instantiator(*this, TemplateArgs, NNS.getBeginLoc(),
3427 DeclarationName());
3428 return Instantiator.TransformNestedNameSpecifierLoc(NNS);
3429}
3430
3431/// Do template substitution on declaration name info.
3432DeclarationNameInfo
3433Sema::SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo,
3434 const MultiLevelTemplateArgumentList &TemplateArgs) {
3435 TemplateInstantiator Instantiator(*this, TemplateArgs, NameInfo.getLoc(),
3436 NameInfo.getName());
3437 return Instantiator.TransformDeclarationNameInfo(NameInfo);
3438}
3439
3440TemplateName
3441Sema::SubstTemplateName(NestedNameSpecifierLoc QualifierLoc,
3442 TemplateName Name, SourceLocation Loc,
3443 const MultiLevelTemplateArgumentList &TemplateArgs) {
3444 TemplateInstantiator Instantiator(*this, TemplateArgs, Loc,
3445 DeclarationName());
3446 CXXScopeSpec SS;
3447 SS.Adopt(QualifierLoc);
3448 return Instantiator.TransformTemplateName(SS, Name, Loc);
3449}
3450
3451bool Sema::Subst(const TemplateArgumentLoc *Args, unsigned NumArgs,
3452 TemplateArgumentListInfo &Result,
3453 const MultiLevelTemplateArgumentList &TemplateArgs) {
3454 TemplateInstantiator Instantiator(*this, TemplateArgs, SourceLocation(),
3455 DeclarationName());
3456
3457 return Instantiator.TransformTemplateArguments(Args, NumArgs, Result);
3458}
3459
3460static const Decl *getCanonicalParmVarDecl(const Decl *D) {
3461 // When storing ParmVarDecls in the local instantiation scope, we always
3462 // want to use the ParmVarDecl from the canonical function declaration,
3463 // since the map is then valid for any redeclaration or definition of that
3464 // function.
3465 if (const ParmVarDecl *PV = dyn_cast<ParmVarDecl>(D)) {
3466 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(PV->getDeclContext())) {
3467 unsigned i = PV->getFunctionScopeIndex();
3468 // This parameter might be from a freestanding function type within the
3469 // function and isn't necessarily referring to one of FD's parameters.
3470 if (i < FD->getNumParams() && FD->getParamDecl(i) == PV)
3471 return FD->getCanonicalDecl()->getParamDecl(i);
3472 }
3473 }
3474 return D;
3475}
3476
3477
3478llvm::PointerUnion<Decl *, LocalInstantiationScope::DeclArgumentPack *> *
3479LocalInstantiationScope::findInstantiationOf(const Decl *D) {
3480 D = getCanonicalParmVarDecl(D);
3481 for (LocalInstantiationScope *Current = this; Current;
3482 Current = Current->Outer) {
3483
3484 // Check if we found something within this scope.
3485 const Decl *CheckD = D;
3486 do {
3487 LocalDeclsMap::iterator Found = Current->LocalDecls.find(CheckD);
3488 if (Found != Current->LocalDecls.end())
3489 return &Found->second;
3490
3491 // If this is a tag declaration, it's possible that we need to look for
3492 // a previous declaration.
3493 if (const TagDecl *Tag = dyn_cast<TagDecl>(CheckD))
3494 CheckD = Tag->getPreviousDecl();
3495 else
3496 CheckD = nullptr;
3497 } while (CheckD);
3498
3499 // If we aren't combined with our outer scope, we're done.
3500 if (!Current->CombineWithOuterScope)
3501 break;
3502 }
3503
3504 // If we're performing a partial substitution during template argument
3505 // deduction, we may not have values for template parameters yet.
3506 if (isa<NonTypeTemplateParmDecl>(D) || isa<TemplateTypeParmDecl>(D) ||
3507 isa<TemplateTemplateParmDecl>(D))
3508 return nullptr;
3509
3510 // Local types referenced prior to definition may require instantiation.
3511 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D))
3512 if (RD->isLocalClass())
3513 return nullptr;
3514
3515 // Enumeration types referenced prior to definition may appear as a result of
3516 // error recovery.
3517 if (isa<EnumDecl>(D))
3518 return nullptr;
3519
3520 // If we didn't find the decl, then we either have a sema bug, or we have a
3521 // forward reference to a label declaration. Return null to indicate that
3522 // we have an uninstantiated label.
3523 assert(isa<LabelDecl>(D) && "declaration not instantiated in this scope")((isa<LabelDecl>(D) && "declaration not instantiated in this scope"
) ? static_cast<void> (0) : __assert_fail ("isa<LabelDecl>(D) && \"declaration not instantiated in this scope\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3523, __PRETTY_FUNCTION__))
;
3524 return nullptr;
3525}
3526
3527void LocalInstantiationScope::InstantiatedLocal(const Decl *D, Decl *Inst) {
3528 D = getCanonicalParmVarDecl(D);
3529 llvm::PointerUnion<Decl *, DeclArgumentPack *> &Stored = LocalDecls[D];
3530 if (Stored.isNull()) {
3531#ifndef NDEBUG
3532 // It should not be present in any surrounding scope either.
3533 LocalInstantiationScope *Current = this;
3534 while (Current->CombineWithOuterScope && Current->Outer) {
3535 Current = Current->Outer;
3536 assert(Current->LocalDecls.find(D) == Current->LocalDecls.end() &&((Current->LocalDecls.find(D) == Current->LocalDecls.end
() && "Instantiated local in inner and outer scopes")
? static_cast<void> (0) : __assert_fail ("Current->LocalDecls.find(D) == Current->LocalDecls.end() && \"Instantiated local in inner and outer scopes\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3537, __PRETTY_FUNCTION__))
3537 "Instantiated local in inner and outer scopes")((Current->LocalDecls.find(D) == Current->LocalDecls.end
() && "Instantiated local in inner and outer scopes")
? static_cast<void> (0) : __assert_fail ("Current->LocalDecls.find(D) == Current->LocalDecls.end() && \"Instantiated local in inner and outer scopes\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3537, __PRETTY_FUNCTION__))
;
3538 }
3539#endif
3540 Stored = Inst;
3541 } else if (DeclArgumentPack *Pack = Stored.dyn_cast<DeclArgumentPack *>()) {
3542 Pack->push_back(cast<VarDecl>(Inst));
3543 } else {
3544 assert(Stored.get<Decl *>() == Inst && "Already instantiated this local")((Stored.get<Decl *>() == Inst && "Already instantiated this local"
) ? static_cast<void> (0) : __assert_fail ("Stored.get<Decl *>() == Inst && \"Already instantiated this local\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3544, __PRETTY_FUNCTION__))
;
3545 }
3546}
3547
3548void LocalInstantiationScope::InstantiatedLocalPackArg(const Decl *D,
3549 VarDecl *Inst) {
3550 D = getCanonicalParmVarDecl(D);
3551 DeclArgumentPack *Pack = LocalDecls[D].get<DeclArgumentPack *>();
3552 Pack->push_back(Inst);
3553}
3554
3555void LocalInstantiationScope::MakeInstantiatedLocalArgPack(const Decl *D) {
3556#ifndef NDEBUG
3557 // This should be the first time we've been told about this decl.
3558 for (LocalInstantiationScope *Current = this;
3559 Current && Current->CombineWithOuterScope; Current = Current->Outer)
3560 assert(Current->LocalDecls.find(D) == Current->LocalDecls.end() &&((Current->LocalDecls.find(D) == Current->LocalDecls.end
() && "Creating local pack after instantiation of local"
) ? static_cast<void> (0) : __assert_fail ("Current->LocalDecls.find(D) == Current->LocalDecls.end() && \"Creating local pack after instantiation of local\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3561, __PRETTY_FUNCTION__))
3561 "Creating local pack after instantiation of local")((Current->LocalDecls.find(D) == Current->LocalDecls.end
() && "Creating local pack after instantiation of local"
) ? static_cast<void> (0) : __assert_fail ("Current->LocalDecls.find(D) == Current->LocalDecls.end() && \"Creating local pack after instantiation of local\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3561, __PRETTY_FUNCTION__))
;
3562#endif
3563
3564 D = getCanonicalParmVarDecl(D);
3565 llvm::PointerUnion<Decl *, DeclArgumentPack *> &Stored = LocalDecls[D];
3566 DeclArgumentPack *Pack = new DeclArgumentPack;
3567 Stored = Pack;
3568 ArgumentPacks.push_back(Pack);
3569}
3570
3571void LocalInstantiationScope::SetPartiallySubstitutedPack(NamedDecl *Pack,
3572 const TemplateArgument *ExplicitArgs,
3573 unsigned NumExplicitArgs) {
3574 assert((!PartiallySubstitutedPack || PartiallySubstitutedPack == Pack) &&(((!PartiallySubstitutedPack || PartiallySubstitutedPack == Pack
) && "Already have a partially-substituted pack") ? static_cast
<void> (0) : __assert_fail ("(!PartiallySubstitutedPack || PartiallySubstitutedPack == Pack) && \"Already have a partially-substituted pack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3575, __PRETTY_FUNCTION__))
3575 "Already have a partially-substituted pack")(((!PartiallySubstitutedPack || PartiallySubstitutedPack == Pack
) && "Already have a partially-substituted pack") ? static_cast
<void> (0) : __assert_fail ("(!PartiallySubstitutedPack || PartiallySubstitutedPack == Pack) && \"Already have a partially-substituted pack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3575, __PRETTY_FUNCTION__))
;
3576 assert((!PartiallySubstitutedPack(((!PartiallySubstitutedPack || NumArgsInPartiallySubstitutedPack
== NumExplicitArgs) && "Wrong number of arguments in partially-substituted pack"
) ? static_cast<void> (0) : __assert_fail ("(!PartiallySubstitutedPack || NumArgsInPartiallySubstitutedPack == NumExplicitArgs) && \"Wrong number of arguments in partially-substituted pack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3578, __PRETTY_FUNCTION__))
3577 || NumArgsInPartiallySubstitutedPack == NumExplicitArgs) &&(((!PartiallySubstitutedPack || NumArgsInPartiallySubstitutedPack
== NumExplicitArgs) && "Wrong number of arguments in partially-substituted pack"
) ? static_cast<void> (0) : __assert_fail ("(!PartiallySubstitutedPack || NumArgsInPartiallySubstitutedPack == NumExplicitArgs) && \"Wrong number of arguments in partially-substituted pack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3578, __PRETTY_FUNCTION__))
3578 "Wrong number of arguments in partially-substituted pack")(((!PartiallySubstitutedPack || NumArgsInPartiallySubstitutedPack
== NumExplicitArgs) && "Wrong number of arguments in partially-substituted pack"
) ? static_cast<void> (0) : __assert_fail ("(!PartiallySubstitutedPack || NumArgsInPartiallySubstitutedPack == NumExplicitArgs) && \"Wrong number of arguments in partially-substituted pack\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3578, __PRETTY_FUNCTION__))
;
3579 PartiallySubstitutedPack = Pack;
3580 ArgsInPartiallySubstitutedPack = ExplicitArgs;
3581 NumArgsInPartiallySubstitutedPack = NumExplicitArgs;
3582}
3583
3584NamedDecl *LocalInstantiationScope::getPartiallySubstitutedPack(
3585 const TemplateArgument **ExplicitArgs,
3586 unsigned *NumExplicitArgs) const {
3587 if (ExplicitArgs)
3588 *ExplicitArgs = nullptr;
3589 if (NumExplicitArgs)
3590 *NumExplicitArgs = 0;
3591
3592 for (const LocalInstantiationScope *Current = this; Current;
3593 Current = Current->Outer) {
3594 if (Current->PartiallySubstitutedPack) {
3595 if (ExplicitArgs)
3596 *ExplicitArgs = Current->ArgsInPartiallySubstitutedPack;
3597 if (NumExplicitArgs)
3598 *NumExplicitArgs = Current->NumArgsInPartiallySubstitutedPack;
3599
3600 return Current->PartiallySubstitutedPack;
3601 }
3602
3603 if (!Current->CombineWithOuterScope)
3604 break;
3605 }
3606
3607 return nullptr;
3608}

/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/TreeTransform.h

1//===------- TreeTransform.h - Semantic Tree Transformation -----*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//===----------------------------------------------------------------------===//
7//
8// This file implements a semantic tree transformation that takes a given
9// AST and rebuilds it, possibly transforming some nodes in the process.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_CLANG_LIB_SEMA_TREETRANSFORM_H
14#define LLVM_CLANG_LIB_SEMA_TREETRANSFORM_H
15
16#include "CoroutineStmtBuilder.h"
17#include "TypeLocBuilder.h"
18#include "clang/AST/Decl.h"
19#include "clang/AST/DeclObjC.h"
20#include "clang/AST/DeclTemplate.h"
21#include "clang/AST/Expr.h"
22#include "clang/AST/ExprConcepts.h"
23#include "clang/AST/ExprCXX.h"
24#include "clang/AST/ExprObjC.h"
25#include "clang/AST/ExprOpenMP.h"
26#include "clang/AST/OpenMPClause.h"
27#include "clang/AST/Stmt.h"
28#include "clang/AST/StmtCXX.h"
29#include "clang/AST/StmtObjC.h"
30#include "clang/AST/StmtOpenMP.h"
31#include "clang/Sema/Designator.h"
32#include "clang/Sema/Lookup.h"
33#include "clang/Sema/Ownership.h"
34#include "clang/Sema/ParsedTemplate.h"
35#include "clang/Sema/ScopeInfo.h"
36#include "clang/Sema/SemaDiagnostic.h"
37#include "clang/Sema/SemaInternal.h"
38#include "llvm/ADT/ArrayRef.h"
39#include "llvm/Support/ErrorHandling.h"
40#include <algorithm>
41
42using namespace llvm::omp;
43
44namespace clang {
45using namespace sema;
46
47/// A semantic tree transformation that allows one to transform one
48/// abstract syntax tree into another.
49///
50/// A new tree transformation is defined by creating a new subclass \c X of
51/// \c TreeTransform<X> and then overriding certain operations to provide
52/// behavior specific to that transformation. For example, template
53/// instantiation is implemented as a tree transformation where the
54/// transformation of TemplateTypeParmType nodes involves substituting the
55/// template arguments for their corresponding template parameters; a similar
56/// transformation is performed for non-type template parameters and
57/// template template parameters.
58///
59/// This tree-transformation template uses static polymorphism to allow
60/// subclasses to customize any of its operations. Thus, a subclass can
61/// override any of the transformation or rebuild operators by providing an
62/// operation with the same signature as the default implementation. The
63/// overriding function should not be virtual.
64///
65/// Semantic tree transformations are split into two stages, either of which
66/// can be replaced by a subclass. The "transform" step transforms an AST node
67/// or the parts of an AST node using the various transformation functions,
68/// then passes the pieces on to the "rebuild" step, which constructs a new AST
69/// node of the appropriate kind from the pieces. The default transformation
70/// routines recursively transform the operands to composite AST nodes (e.g.,
71/// the pointee type of a PointerType node) and, if any of those operand nodes
72/// were changed by the transformation, invokes the rebuild operation to create
73/// a new AST node.
74///
75/// Subclasses can customize the transformation at various levels. The
76/// most coarse-grained transformations involve replacing TransformType(),
77/// TransformExpr(), TransformDecl(), TransformNestedNameSpecifierLoc(),
78/// TransformTemplateName(), or TransformTemplateArgument() with entirely
79/// new implementations.
80///
81/// For more fine-grained transformations, subclasses can replace any of the
82/// \c TransformXXX functions (where XXX is the name of an AST node, e.g.,
83/// PointerType, StmtExpr) to alter the transformation. As mentioned previously,
84/// replacing TransformTemplateTypeParmType() allows template instantiation
85/// to substitute template arguments for their corresponding template
86/// parameters. Additionally, subclasses can override the \c RebuildXXX
87/// functions to control how AST nodes are rebuilt when their operands change.
88/// By default, \c TreeTransform will invoke semantic analysis to rebuild
89/// AST nodes. However, certain other tree transformations (e.g, cloning) may
90/// be able to use more efficient rebuild steps.
91///
92/// There are a handful of other functions that can be overridden, allowing one
93/// to avoid traversing nodes that don't need any transformation
94/// (\c AlreadyTransformed()), force rebuilding AST nodes even when their
95/// operands have not changed (\c AlwaysRebuild()), and customize the
96/// default locations and entity names used for type-checking
97/// (\c getBaseLocation(), \c getBaseEntity()).
98template<typename Derived>
99class TreeTransform {
100 /// Private RAII object that helps us forget and then re-remember
101 /// the template argument corresponding to a partially-substituted parameter
102 /// pack.
103 class ForgetPartiallySubstitutedPackRAII {
104 Derived &Self;
105 TemplateArgument Old;
106
107 public:
108 ForgetPartiallySubstitutedPackRAII(Derived &Self) : Self(Self) {
109 Old = Self.ForgetPartiallySubstitutedPack();
110 }
111
112 ~ForgetPartiallySubstitutedPackRAII() {
113 Self.RememberPartiallySubstitutedPack(Old);
114 }
115 };
116
117protected:
118 Sema &SemaRef;
119
120 /// The set of local declarations that have been transformed, for
121 /// cases where we are forced to build new declarations within the transformer
122 /// rather than in the subclass (e.g., lambda closure types).
123 llvm::DenseMap<Decl *, Decl *> TransformedLocalDecls;
124
125public:
126 /// Initializes a new tree transformer.
127 TreeTransform(Sema &SemaRef) : SemaRef(SemaRef) { }
128
129 /// Retrieves a reference to the derived class.
130 Derived &getDerived() { return static_cast<Derived&>(*this); }
131
132 /// Retrieves a reference to the derived class.
133 const Derived &getDerived() const {
134 return static_cast<const Derived&>(*this);
135 }
136
137 static inline ExprResult Owned(Expr *E) { return E; }
138 static inline StmtResult Owned(Stmt *S) { return S; }
139
140 /// Retrieves a reference to the semantic analysis object used for
141 /// this tree transform.
142 Sema &getSema() const { return SemaRef; }
143
144 /// Whether the transformation should always rebuild AST nodes, even
145 /// if none of the children have changed.
146 ///
147 /// Subclasses may override this function to specify when the transformation
148 /// should rebuild all AST nodes.
149 ///
150 /// We must always rebuild all AST nodes when performing variadic template
151 /// pack expansion, in order to avoid violating the AST invariant that each
152 /// statement node appears at most once in its containing declaration.
153 bool AlwaysRebuild() { return SemaRef.ArgumentPackSubstitutionIndex != -1; }
154
155 /// Whether the transformation is forming an expression or statement that
156 /// replaces the original. In this case, we'll reuse mangling numbers from
157 /// existing lambdas.
158 bool ReplacingOriginal() { return false; }
159
160 /// Returns the location of the entity being transformed, if that
161 /// information was not available elsewhere in the AST.
162 ///
163 /// By default, returns no source-location information. Subclasses can
164 /// provide an alternative implementation that provides better location
165 /// information.
166 SourceLocation getBaseLocation() { return SourceLocation(); }
167
168 /// Returns the name of the entity being transformed, if that
169 /// information was not available elsewhere in the AST.
170 ///
171 /// By default, returns an empty name. Subclasses can provide an alternative
172 /// implementation with a more precise name.
173 DeclarationName getBaseEntity() { return DeclarationName(); }
174
175 /// Sets the "base" location and entity when that
176 /// information is known based on another transformation.
177 ///
178 /// By default, the source location and entity are ignored. Subclasses can
179 /// override this function to provide a customized implementation.
180 void setBase(SourceLocation Loc, DeclarationName Entity) { }
181
182 /// RAII object that temporarily sets the base location and entity
183 /// used for reporting diagnostics in types.
184 class TemporaryBase {
185 TreeTransform &Self;
186 SourceLocation OldLocation;
187 DeclarationName OldEntity;
188
189 public:
190 TemporaryBase(TreeTransform &Self, SourceLocation Location,
191 DeclarationName Entity) : Self(Self) {
192 OldLocation = Self.getDerived().getBaseLocation();
193 OldEntity = Self.getDerived().getBaseEntity();
194
195 if (Location.isValid())
196 Self.getDerived().setBase(Location, Entity);
197 }
198
199 ~TemporaryBase() {
200 Self.getDerived().setBase(OldLocation, OldEntity);
201 }
202 };
203
204 /// Determine whether the given type \p T has already been
205 /// transformed.
206 ///
207 /// Subclasses can provide an alternative implementation of this routine
208 /// to short-circuit evaluation when it is known that a given type will
209 /// not change. For example, template instantiation need not traverse
210 /// non-dependent types.
211 bool AlreadyTransformed(QualType T) {
212 return T.isNull();
213 }
214
215 /// Determine whether the given call argument should be dropped, e.g.,
216 /// because it is a default argument.
217 ///
218 /// Subclasses can provide an alternative implementation of this routine to
219 /// determine which kinds of call arguments get dropped. By default,
220 /// CXXDefaultArgument nodes are dropped (prior to transformation).
221 bool DropCallArgument(Expr *E) {
222 return E->isDefaultArgument();
223 }
224
225 /// Determine whether we should expand a pack expansion with the
226 /// given set of parameter packs into separate arguments by repeatedly
227 /// transforming the pattern.
228 ///
229 /// By default, the transformer never tries to expand pack expansions.
230 /// Subclasses can override this routine to provide different behavior.
231 ///
232 /// \param EllipsisLoc The location of the ellipsis that identifies the
233 /// pack expansion.
234 ///
235 /// \param PatternRange The source range that covers the entire pattern of
236 /// the pack expansion.
237 ///
238 /// \param Unexpanded The set of unexpanded parameter packs within the
239 /// pattern.
240 ///
241 /// \param ShouldExpand Will be set to \c true if the transformer should
242 /// expand the corresponding pack expansions into separate arguments. When
243 /// set, \c NumExpansions must also be set.
244 ///
245 /// \param RetainExpansion Whether the caller should add an unexpanded
246 /// pack expansion after all of the expanded arguments. This is used
247 /// when extending explicitly-specified template argument packs per
248 /// C++0x [temp.arg.explicit]p9.
249 ///
250 /// \param NumExpansions The number of separate arguments that will be in
251 /// the expanded form of the corresponding pack expansion. This is both an
252 /// input and an output parameter, which can be set by the caller if the
253 /// number of expansions is known a priori (e.g., due to a prior substitution)
254 /// and will be set by the callee when the number of expansions is known.
255 /// The callee must set this value when \c ShouldExpand is \c true; it may
256 /// set this value in other cases.
257 ///
258 /// \returns true if an error occurred (e.g., because the parameter packs
259 /// are to be instantiated with arguments of different lengths), false
260 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions)
261 /// must be set.
262 bool TryExpandParameterPacks(SourceLocation EllipsisLoc,
263 SourceRange PatternRange,
264 ArrayRef<UnexpandedParameterPack> Unexpanded,
265 bool &ShouldExpand,
266 bool &RetainExpansion,
267 Optional<unsigned> &NumExpansions) {
268 ShouldExpand = false;
269 return false;
270 }
271
272 /// "Forget" about the partially-substituted pack template argument,
273 /// when performing an instantiation that must preserve the parameter pack
274 /// use.
275 ///
276 /// This routine is meant to be overridden by the template instantiator.
277 TemplateArgument ForgetPartiallySubstitutedPack() {
278 return TemplateArgument();
279 }
280
281 /// "Remember" the partially-substituted pack template argument
282 /// after performing an instantiation that must preserve the parameter pack
283 /// use.
284 ///
285 /// This routine is meant to be overridden by the template instantiator.
286 void RememberPartiallySubstitutedPack(TemplateArgument Arg) { }
287
288 /// Note to the derived class when a function parameter pack is
289 /// being expanded.
290 void ExpandingFunctionParameterPack(ParmVarDecl *Pack) { }
291
292 /// Transforms the given type into another type.
293 ///
294 /// By default, this routine transforms a type by creating a
295 /// TypeSourceInfo for it and delegating to the appropriate
296 /// function. This is expensive, but we don't mind, because
297 /// this method is deprecated anyway; all users should be
298 /// switched to storing TypeSourceInfos.
299 ///
300 /// \returns the transformed type.
301 QualType TransformType(QualType T);
302
303 /// Transforms the given type-with-location into a new
304 /// type-with-location.
305 ///
306 /// By default, this routine transforms a type by delegating to the
307 /// appropriate TransformXXXType to build a new type. Subclasses
308 /// may override this function (to take over all type
309 /// transformations) or some set of the TransformXXXType functions
310 /// to alter the transformation.
311 TypeSourceInfo *TransformType(TypeSourceInfo *DI);
312
313 /// Transform the given type-with-location into a new
314 /// type, collecting location information in the given builder
315 /// as necessary.
316 ///
317 QualType TransformType(TypeLocBuilder &TLB, TypeLoc TL);
318
319 /// Transform a type that is permitted to produce a
320 /// DeducedTemplateSpecializationType.
321 ///
322 /// This is used in the (relatively rare) contexts where it is acceptable
323 /// for transformation to produce a class template type with deduced
324 /// template arguments.
325 /// @{
326 QualType TransformTypeWithDeducedTST(QualType T);
327 TypeSourceInfo *TransformTypeWithDeducedTST(TypeSourceInfo *DI);
328 /// @}
329
330 /// The reason why the value of a statement is not discarded, if any.
331 enum StmtDiscardKind {
332 SDK_Discarded,
333 SDK_NotDiscarded,
334 SDK_StmtExprResult,
335 };
336
337 /// Transform the given statement.
338 ///
339 /// By default, this routine transforms a statement by delegating to the
340 /// appropriate TransformXXXStmt function to transform a specific kind of
341 /// statement or the TransformExpr() function to transform an expression.
342 /// Subclasses may override this function to transform statements using some
343 /// other mechanism.
344 ///
345 /// \returns the transformed statement.
346 StmtResult TransformStmt(Stmt *S, StmtDiscardKind SDK = SDK_Discarded);
347
348 /// Transform the given statement.
349 ///
350 /// By default, this routine transforms a statement by delegating to the
351 /// appropriate TransformOMPXXXClause function to transform a specific kind
352 /// of clause. Subclasses may override this function to transform statements
353 /// using some other mechanism.
354 ///
355 /// \returns the transformed OpenMP clause.
356 OMPClause *TransformOMPClause(OMPClause *S);
357
358 /// Transform the given attribute.
359 ///
360 /// By default, this routine transforms a statement by delegating to the
361 /// appropriate TransformXXXAttr function to transform a specific kind
362 /// of attribute. Subclasses may override this function to transform
363 /// attributed statements using some other mechanism.
364 ///
365 /// \returns the transformed attribute
366 const Attr *TransformAttr(const Attr *S);
367
368/// Transform the specified attribute.
369///
370/// Subclasses should override the transformation of attributes with a pragma
371/// spelling to transform expressions stored within the attribute.
372///
373/// \returns the transformed attribute.
374#define ATTR(X)
375#define PRAGMA_SPELLING_ATTR(X) \
376 const X##Attr *Transform##X##Attr(const X##Attr *R) { return R; }
377#include "clang/Basic/AttrList.inc"
378
379 /// Transform the given expression.
380 ///
381 /// By default, this routine transforms an expression by delegating to the
382 /// appropriate TransformXXXExpr function to build a new expression.
383 /// Subclasses may override this function to transform expressions using some
384 /// other mechanism.
385 ///
386 /// \returns the transformed expression.
387 ExprResult TransformExpr(Expr *E);
388
389 /// Transform the given initializer.
390 ///
391 /// By default, this routine transforms an initializer by stripping off the
392 /// semantic nodes added by initialization, then passing the result to
393 /// TransformExpr or TransformExprs.
394 ///
395 /// \returns the transformed initializer.
396 ExprResult TransformInitializer(Expr *Init, bool NotCopyInit);
397
398 /// Transform the given list of expressions.
399 ///
400 /// This routine transforms a list of expressions by invoking
401 /// \c TransformExpr() for each subexpression. However, it also provides
402 /// support for variadic templates by expanding any pack expansions (if the
403 /// derived class permits such expansion) along the way. When pack expansions
404 /// are present, the number of outputs may not equal the number of inputs.
405 ///
406 /// \param Inputs The set of expressions to be transformed.
407 ///
408 /// \param NumInputs The number of expressions in \c Inputs.
409 ///
410 /// \param IsCall If \c true, then this transform is being performed on
411 /// function-call arguments, and any arguments that should be dropped, will
412 /// be.
413 ///
414 /// \param Outputs The transformed input expressions will be added to this
415 /// vector.
416 ///
417 /// \param ArgChanged If non-NULL, will be set \c true if any argument changed
418 /// due to transformation.
419 ///
420 /// \returns true if an error occurred, false otherwise.
421 bool TransformExprs(Expr *const *Inputs, unsigned NumInputs, bool IsCall,
422 SmallVectorImpl<Expr *> &Outputs,
423 bool *ArgChanged = nullptr);
424
425 /// Transform the given declaration, which is referenced from a type
426 /// or expression.
427 ///
428 /// By default, acts as the identity function on declarations, unless the
429 /// transformer has had to transform the declaration itself. Subclasses
430 /// may override this function to provide alternate behavior.
431 Decl *TransformDecl(SourceLocation Loc, Decl *D) {
432 llvm::DenseMap<Decl *, Decl *>::iterator Known
433 = TransformedLocalDecls.find(D);
434 if (Known != TransformedLocalDecls.end())
435 return Known->second;
436
437 return D;
438 }
439
440 /// Transform the specified condition.
441 ///
442 /// By default, this transforms the variable and expression and rebuilds
443 /// the condition.
444 Sema::ConditionResult TransformCondition(SourceLocation Loc, VarDecl *Var,
445 Expr *Expr,
446 Sema::ConditionKind Kind);
447
448 /// Transform the attributes associated with the given declaration and
449 /// place them on the new declaration.
450 ///
451 /// By default, this operation does nothing. Subclasses may override this
452 /// behavior to transform attributes.
453 void transformAttrs(Decl *Old, Decl *New) { }
454
455 /// Note that a local declaration has been transformed by this
456 /// transformer.
457 ///
458 /// Local declarations are typically transformed via a call to
459 /// TransformDefinition. However, in some cases (e.g., lambda expressions),
460 /// the transformer itself has to transform the declarations. This routine
461 /// can be overridden by a subclass that keeps track of such mappings.
462 void transformedLocalDecl(Decl *Old, ArrayRef<Decl *> New) {
463 assert(New.size() == 1 &&((New.size() == 1 && "must override transformedLocalDecl if performing pack expansion"
) ? static_cast<void> (0) : __assert_fail ("New.size() == 1 && \"must override transformedLocalDecl if performing pack expansion\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/TreeTransform.h"
, 464, __PRETTY_FUNCTION__))
464 "must override transformedLocalDecl if performing pack expansion")((New.size() == 1 && "must override transformedLocalDecl if performing pack expansion"
) ? static_cast<void> (0) : __assert_fail ("New.size() == 1 && \"must override transformedLocalDecl if performing pack expansion\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/TreeTransform.h"
, 464, __PRETTY_FUNCTION__))
;
465 TransformedLocalDecls[Old] = New.front();
466 }
467
468 /// Transform the definition of the given declaration.
469 ///
470 /// By default, invokes TransformDecl() to transform the declaration.
471 /// Subclasses may override this function to provide alternate behavior.
472 Decl *TransformDefinition(SourceLocation Loc, Decl *D) {
473 return getDerived().TransformDecl(Loc, D);
474 }
475
476 /// Transform the given declaration, which was the first part of a
477 /// nested-name-specifier in a member access expression.
478 ///
479 /// This specific declaration transformation only applies to the first
480 /// identifier in a nested-name-specifier of a member access expression, e.g.,
481 /// the \c T in \c x->T::member
482 ///
483 /// By default, invokes TransformDecl() to transform the declaration.
484 /// Subclasses may override this function to provide alternate behavior.
485 NamedDecl *TransformFirstQualifierInScope(NamedDecl *D, SourceLocation Loc) {
486 return cast_or_null<NamedDecl>(getDerived().TransformDecl(Loc, D));
487 }
488
489 /// Transform the set of declarations in an OverloadExpr.
490 bool TransformOverloadExprDecls(OverloadExpr *Old, bool RequiresADL,
491 LookupResult &R);
492
493 /// Transform the given nested-name-specifier with source-location
494 /// information.
495 ///
496 /// By default, transforms all of the types and declarations within the
497 /// nested-name-specifier. Subclasses may override this function to provide
498 /// alternate behavior.
499 NestedNameSpecifierLoc
500 TransformNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS,
501 QualType ObjectType = QualType(),
502 NamedDecl *FirstQualifierInScope = nullptr);
503
504 /// Transform the given declaration name.
505 ///
506 /// By default, transforms the types of conversion function, constructor,
507 /// and destructor names and then (if needed) rebuilds the declaration name.
508 /// Identifiers and selectors are returned unmodified. Sublcasses may
509 /// override this function to provide alternate behavior.
510 DeclarationNameInfo
511 TransformDeclarationNameInfo(const DeclarationNameInfo &NameInfo);
512
513 bool TransformRequiresExprRequirements(ArrayRef<concepts::Requirement *> Reqs,
514 llvm::SmallVectorImpl<concepts::Requirement *> &Transformed);
515 concepts::TypeRequirement *
516 TransformTypeRequirement(concepts::TypeRequirement *Req);
517 concepts::ExprRequirement *
518 TransformExprRequirement(concepts::ExprRequirement *Req);
519 concepts::NestedRequirement *
520 TransformNestedRequirement(concepts::NestedRequirement *Req);
521
522 /// Transform the given template name.
523 ///
524 /// \param SS The nested-name-specifier that qualifies the template
525 /// name. This nested-name-specifier must already have been transformed.
526 ///
527 /// \param Name The template name to transform.
528 ///
529 /// \param NameLoc The source location of the template name.
530 ///
531 /// \param ObjectType If we're translating a template name within a member
532 /// access expression, this is the type of the object whose member template
533 /// is being referenced.
534 ///
535 /// \param FirstQualifierInScope If the first part of a nested-name-specifier
536 /// also refers to a name within the current (lexical) scope, this is the
537 /// declaration it refers to.
538 ///
539 /// By default, transforms the template name by transforming the declarations
540 /// and nested-name-specifiers that occur within the template name.
541 /// Subclasses may override this function to provide alternate behavior.
542 TemplateName
543 TransformTemplateName(CXXScopeSpec &SS, TemplateName Name,
544 SourceLocation NameLoc,
545 QualType ObjectType = QualType(),
546 NamedDecl *FirstQualifierInScope = nullptr,
547 bool AllowInjectedClassName = false);
548
549 /// Transform the given template argument.
550 ///
551 /// By default, this operation transforms the type, expression, or
552 /// declaration stored within the template argument and constructs a
553 /// new template argument from the transformed result. Subclasses may
554 /// override this function to provide alternate behavior.
555 ///
556 /// Returns true if there was an error.
557 bool TransformTemplateArgument(const TemplateArgumentLoc &Input,
558 TemplateArgumentLoc &Output,
559 bool Uneval = false);
560
561 /// Transform the given set of template arguments.
562 ///
563 /// By default, this operation transforms all of the template arguments
564 /// in the input set using \c TransformTemplateArgument(), and appends
565 /// the transformed arguments to the output list.
566 ///
567 /// Note that this overload of \c TransformTemplateArguments() is merely
568 /// a convenience function. Subclasses that wish to override this behavior
569 /// should override the iterator-based member template version.
570 ///
571 /// \param Inputs The set of template arguments to be transformed.
572 ///
573 /// \param NumInputs The number of template arguments in \p Inputs.
574 ///
575 /// \param Outputs The set of transformed template arguments output by this
576 /// routine.
577 ///
578 /// Returns true if an error occurred.
579 bool TransformTemplateArguments(const TemplateArgumentLoc *Inputs,
580 unsigned NumInputs,
581 TemplateArgumentListInfo &Outputs,
582 bool Uneval = false) {
583 return TransformTemplateArguments(Inputs, Inputs + NumInputs, Outputs,
584 Uneval);
585 }
586
587 /// Transform the given set of template arguments.
588 ///
589 /// By default, this operation transforms all of the template arguments
590 /// in the input set using \c TransformTemplateArgument(), and appends
591 /// the transformed arguments to the output list.
592 ///
593 /// \param First An iterator to the first template argument.
594 ///
595 /// \param Last An iterator one step past the last template argument.
596 ///
597 /// \param Outputs The set of transformed template arguments output by this
598 /// routine.
599 ///
600 /// Returns true if an error occurred.
601 template<typename InputIterator>
602 bool TransformTemplateArguments(InputIterator First,
603 InputIterator Last,
604 TemplateArgumentListInfo &Outputs,
605 bool Uneval = false);
606
607 /// Fakes up a TemplateArgumentLoc for a given TemplateArgument.
608 void InventTemplateArgumentLoc(const TemplateArgument &Arg,
609 TemplateArgumentLoc &ArgLoc);
610
611 /// Fakes up a TypeSourceInfo for a type.
612 TypeSourceInfo *InventTypeSourceInfo(QualType T) {
613 return SemaRef.Context.getTrivialTypeSourceInfo(T,
614 getDerived().getBaseLocation());
615 }
616
617#define ABSTRACT_TYPELOC(CLASS, PARENT)
618#define TYPELOC(CLASS, PARENT) \
619 QualType Transform##CLASS##Type(TypeLocBuilder &TLB, CLASS##TypeLoc T);
620#include "clang/AST/TypeLocNodes.def"
621
622 template<typename Fn>
623 QualType TransformFunctionProtoType(TypeLocBuilder &TLB,
624 FunctionProtoTypeLoc TL,
625 CXXRecordDecl *ThisContext,
626 Qualifiers ThisTypeQuals,
627 Fn TransformExceptionSpec);
628
629 bool TransformExceptionSpec(SourceLocation Loc,
630 FunctionProtoType::ExceptionSpecInfo &ESI,
631 SmallVectorImpl<QualType> &Exceptions,
632 bool &Changed);
633
634 StmtResult TransformSEHHandler(Stmt *Handler);
635
636 QualType
637 TransformTemplateSpecializationType(TypeLocBuilder &TLB,
638 TemplateSpecializationTypeLoc TL,
639 TemplateName Template);
640
641 QualType
642 TransformDependentTemplateSpecializationType(TypeLocBuilder &TLB,
643 DependentTemplateSpecializationTypeLoc TL,
644 TemplateName Template,
645 CXXScopeSpec &SS);
646
647 QualType TransformDependentTemplateSpecializationType(
648 TypeLocBuilder &TLB, DependentTemplateSpecializationTypeLoc TL,
649 NestedNameSpecifierLoc QualifierLoc);
650
651 /// Transforms the parameters of a function type into the
652 /// given vectors.
653 ///
654 /// The result vectors should be kept in sync; null entries in the
655 /// variables vector are acceptable.
656 ///
657 /// Return true on error.
658 bool TransformFunctionTypeParams(
659 SourceLocation Loc, ArrayRef<ParmVarDecl *> Params,
660 const QualType *ParamTypes,
661 const FunctionProtoType::ExtParameterInfo *ParamInfos,
662 SmallVectorImpl<QualType> &PTypes, SmallVectorImpl<ParmVarDecl *> *PVars,
663 Sema::ExtParameterInfoBuilder &PInfos);
664
665 /// Transforms a single function-type parameter. Return null
666 /// on error.
667 ///
668 /// \param indexAdjustment - A number to add to the parameter's
669 /// scope index; can be negative
670 ParmVarDecl *TransformFunctionTypeParam(ParmVarDecl *OldParm,
671 int indexAdjustment,
672 Optional<unsigned> NumExpansions,
673 bool ExpectParameterPack);
674
675 /// Transform the body of a lambda-expression.
676 StmtResult TransformLambdaBody(LambdaExpr *E, Stmt *Body);
677 /// Alternative implementation of TransformLambdaBody that skips transforming
678 /// the body.
679 StmtResult SkipLambdaBody(LambdaExpr *E, Stmt *Body);
680
681 QualType TransformReferenceType(TypeLocBuilder &TLB, ReferenceTypeLoc TL);
682
683 StmtResult TransformCompoundStmt(CompoundStmt *S, bool IsStmtExpr);
684 ExprResult TransformCXXNamedCastExpr(CXXNamedCastExpr *E);
685
686 TemplateParameterList *TransformTemplateParameterList(
687 TemplateParameterList *TPL) {
688 return TPL;
689 }
690
691 ExprResult TransformAddressOfOperand(Expr *E);
692
693 ExprResult TransformDependentScopeDeclRefExpr(DependentScopeDeclRefExpr *E,
694 bool IsAddressOfOperand,
695 TypeSourceInfo **RecoveryTSI);
696
697 ExprResult TransformParenDependentScopeDeclRefExpr(
698 ParenExpr *PE, DependentScopeDeclRefExpr *DRE, bool IsAddressOfOperand,
699 TypeSourceInfo **RecoveryTSI);
700
701 StmtResult TransformOMPExecutableDirective(OMPExecutableDirective *S);
702
703// FIXME: We use LLVM_ATTRIBUTE_NOINLINE because inlining causes a ridiculous
704// amount of stack usage with clang.
705#define STMT(Node, Parent) \
706 LLVM_ATTRIBUTE_NOINLINE__attribute__((noinline)) \
707 StmtResult Transform##Node(Node *S);
708#define VALUESTMT(Node, Parent) \
709 LLVM_ATTRIBUTE_NOINLINE__attribute__((noinline)) \
710 StmtResult Transform##Node(Node *S, StmtDiscardKind SDK);
711#define EXPR(Node, Parent) \
712 LLVM_ATTRIBUTE_NOINLINE__attribute__((noinline)) \
713 ExprResult Transform##Node(Node *E);
714#define ABSTRACT_STMT(Stmt)
715#include "clang/AST/StmtNodes.inc"
716
717#define OPENMP_CLAUSE(Name, Class) \
718 LLVM_ATTRIBUTE_NOINLINE__attribute__((noinline)) \
719 OMPClause *Transform ## Class(Class *S);
720#include "clang/Basic/OpenMPKinds.def"
721
722 /// Build a new qualified type given its unqualified type and type location.
723 ///
724 /// By default, this routine adds type qualifiers only to types that can
725 /// have qualifiers, and silently suppresses those qualifiers that are not
726 /// permitted. Subclasses may override this routine to provide different
727 /// behavior.
728 QualType RebuildQualifiedType(QualType T, QualifiedTypeLoc TL);
729
730 /// Build a new pointer type given its pointee type.
731 ///
732 /// By default, performs semantic analysis when building the pointer type.
733 /// Subclasses may override this routine to provide different behavior.
734 QualType RebuildPointerType(QualType PointeeType, SourceLocation Sigil);
735
736 /// Build a new block pointer type given its pointee type.
737 ///
738 /// By default, performs semantic analysis when building the block pointer
739 /// type. Subclasses may override this routine to provide different behavior.
740 QualType RebuildBlockPointerType(QualType PointeeType, SourceLocation Sigil);
741
742 /// Build a new reference type given the type it references.
743 ///
744 /// By default, performs semantic analysis when building the
745 /// reference type. Subclasses may override this routine to provide
746 /// different behavior.
747 ///
748 /// \param LValue whether the type was written with an lvalue sigil
749 /// or an rvalue sigil.
750 QualType RebuildReferenceType(QualType ReferentType,
751 bool LValue,
752 SourceLocation Sigil);
753
754 /// Build a new member pointer type given the pointee type and the
755 /// class type it refers into.
756 ///
757 /// By default, performs semantic analysis when building the member pointer
758 /// type. Subclasses may override this routine to provide different behavior.
759 QualType RebuildMemberPointerType(QualType PointeeType, QualType ClassType,
760 SourceLocation Sigil);
761
762 QualType RebuildObjCTypeParamType(const ObjCTypeParamDecl *Decl,
763 SourceLocation ProtocolLAngleLoc,
764 ArrayRef<ObjCProtocolDecl *> Protocols,
765 ArrayRef<SourceLocation> ProtocolLocs,
766 SourceLocation ProtocolRAngleLoc);
767
768 /// Build an Objective-C object type.
769 ///
770 /// By default, performs semantic analysis when building the object type.
771 /// Subclasses may override this routine to provide different behavior.
772 QualType RebuildObjCObjectType(QualType BaseType,
773 SourceLocation Loc,
774 SourceLocation TypeArgsLAngleLoc,
775 ArrayRef<TypeSourceInfo *> TypeArgs,
776 SourceLocation TypeArgsRAngleLoc,
777 SourceLocation ProtocolLAngleLoc,
778 ArrayRef<ObjCProtocolDecl *> Protocols,
779 ArrayRef<SourceLocation> ProtocolLocs,
780 SourceLocation ProtocolRAngleLoc);
781
782 /// Build a new Objective-C object pointer type given the pointee type.
783 ///
784 /// By default, directly builds the pointer type, with no additional semantic
785 /// analysis.
786 QualType RebuildObjCObjectPointerType(QualType PointeeType,
787 SourceLocation Star);
788
789 /// Build a new array type given the element type, size
790 /// modifier, size of the array (if known), size expression, and index type
791 /// qualifiers.
792 ///
793 /// By default, performs semantic analysis when building the array type.
794 /// Subclasses may override this routine to provide different behavior.
795 /// Also by default, all of the other Rebuild*Array
796 QualType RebuildArrayType(QualType ElementType,
797 ArrayType::ArraySizeModifier SizeMod,
798 const llvm::APInt *Size,
799 Expr *SizeExpr,
800 unsigned IndexTypeQuals,
801 SourceRange BracketsRange);
802
803 /// Build a new constant array type given the element type, size
804 /// modifier, (known) size of the array, and index type qualifiers.
805 ///
806 /// By default, performs semantic analysis when building the array type.
807 /// Subclasses may override this routine to provide different behavior.
808 QualType RebuildConstantArrayType(QualType ElementType,
809 ArrayType::ArraySizeModifier SizeMod,
810 const llvm::APInt &Size,
811 Expr *SizeExpr,
812 unsigned IndexTypeQuals,
813 SourceRange BracketsRange);
814
815 /// Build a new incomplete array type given the element type, size
816 /// modifier, and index type qualifiers.
817 ///
818 /// By default, performs semantic analysis when building the array type.
819 /// Subclasses may override this routine to provide different behavior.
820 QualType RebuildIncompleteArrayType(QualType ElementType,
821 ArrayType::ArraySizeModifier SizeMod,
822 unsigned IndexTypeQuals,
823 SourceRange BracketsRange);
824
825 /// Build a new variable-length array type given the element type,
826 /// size modifier, size expression, and index type qualifiers.
827 ///
828 /// By default, performs semantic analysis when building the array type.
829 /// Subclasses may override this routine to provide different behavior.
830 QualType RebuildVariableArrayType(QualType ElementType,
831 ArrayType::ArraySizeModifier SizeMod,
832 Expr *SizeExpr,
833 unsigned IndexTypeQuals,
834 SourceRange BracketsRange);
835
836 /// Build a new dependent-sized array type given the element type,
837 /// size modifier, size expression, and index type qualifiers.
838 ///
839 /// By default, performs semantic analysis when building the array type.
840 /// Subclasses may override this routine to provide different behavior.
841 QualType RebuildDependentSizedArrayType(QualType ElementType,
842 ArrayType::ArraySizeModifier SizeMod,
843 Expr *SizeExpr,
844 unsigned IndexTypeQuals,
845 SourceRange BracketsRange);
846
847 /// Build a new vector type given the element type and
848 /// number of elements.
849 ///
850 /// By default, performs semantic analysis when building the vector type.
851 /// Subclasses may override this routine to provide different behavior.
852 QualType RebuildVectorType(QualType ElementType, unsigned NumElements,
853 VectorType::VectorKind VecKind);
854
855 /// Build a new potentially dependently-sized extended vector type
856 /// given the element type and number of elements.
857 ///
858 /// By default, performs semantic analysis when building the vector type.
859 /// Subclasses may override this routine to provide different behavior.
860 QualType RebuildDependentVectorType(QualType ElementType, Expr *SizeExpr,
861 SourceLocation AttributeLoc,
862 VectorType::VectorKind);
863
864 /// Build a new extended vector type given the element type and
865 /// number of elements.
866 ///
867 /// By default, performs semantic analysis when building the vector type.
868 /// Subclasses may override this routine to provide different behavior.
869 QualType RebuildExtVectorType(QualType ElementType, unsigned NumElements,
870 SourceLocation AttributeLoc);
871
872 /// Build a new potentially dependently-sized extended vector type
873 /// given the element type and number of elements.
874 ///
875 /// By default, performs semantic analysis when building the vector type.
876 /// Subclasses may override this routine to provide different behavior.
877 QualType RebuildDependentSizedExtVectorType(QualType ElementType,
878 Expr *SizeExpr,
879 SourceLocation AttributeLoc);
880
881 /// Build a new DependentAddressSpaceType or return the pointee
882 /// type variable with the correct address space (retrieved from
883 /// AddrSpaceExpr) applied to it. The former will be returned in cases
884 /// where the address space remains dependent.
885 ///
886 /// By default, performs semantic analysis when building the type with address
887 /// space applied. Subclasses may override this routine to provide different
888 /// behavior.
889 QualType RebuildDependentAddressSpaceType(QualType PointeeType,
890 Expr *AddrSpaceExpr,
891 SourceLocation AttributeLoc);
892
893 /// Build a new function type.
894 ///
895 /// By default, performs semantic analysis when building the function type.
896 /// Subclasses may override this routine to provide different behavior.
897 QualType RebuildFunctionProtoType(QualType T,
898 MutableArrayRef<QualType> ParamTypes,
899 const FunctionProtoType::ExtProtoInfo &EPI);
900
901 /// Build a new unprototyped function type.
902 QualType RebuildFunctionNoProtoType(QualType ResultType);
903
904 /// Rebuild an unresolved typename type, given the decl that
905 /// the UnresolvedUsingTypenameDecl was transformed to.
906 QualType RebuildUnresolvedUsingType(SourceLocation NameLoc, Decl *D);
907
908 /// Build a new typedef type.
909 QualType RebuildTypedefType(TypedefNameDecl *Typedef) {
910 return SemaRef.Context.getTypeDeclType(Typedef);
911 }
912
913 /// Build a new MacroDefined type.
914 QualType RebuildMacroQualifiedType(QualType T,
915 const IdentifierInfo *MacroII) {
916 return SemaRef.Context.getMacroQualifiedType(T, MacroII);
917 }
918
919 /// Build a new class/struct/union type.
920 QualType RebuildRecordType(RecordDecl *Record) {
921 return SemaRef.Context.getTypeDeclType(Record);
922 }
923
924 /// Build a new Enum type.
925 QualType RebuildEnumType(EnumDecl *Enum) {
926 return SemaRef.Context.getTypeDeclType(Enum);
927 }
928
929 /// Build a new typeof(expr) type.
930 ///
931 /// By default, performs semantic analysis when building the typeof type.
932 /// Subclasses may override this routine to provide different behavior.
933 QualType RebuildTypeOfExprType(Expr *Underlying, SourceLocation Loc);
934
935 /// Build a new typeof(type) type.
936 ///
937 /// By default, builds a new TypeOfType with the given underlying type.
938 QualType RebuildTypeOfType(QualType Underlying);
939
940 /// Build a new unary transform type.
941 QualType RebuildUnaryTransformType(QualType BaseType,
942 UnaryTransformType::UTTKind UKind,
943 SourceLocation Loc);
944
945 /// Build a new C++11 decltype type.
946 ///
947 /// By default, performs semantic analysis when building the decltype type.
948 /// Subclasses may override this routine to provide different behavior.
949 QualType RebuildDecltypeType(Expr *Underlying, SourceLocation Loc);
950
951 /// Build a new C++11 auto type.
952 ///
953 /// By default, builds a new AutoType with the given deduced type.
954 QualType RebuildAutoType(QualType Deduced, AutoTypeKeyword Keyword,
955 ConceptDecl *TypeConstraintConcept,
956 ArrayRef<TemplateArgument> TypeConstraintArgs) {
957 // Note, IsDependent is always false here: we implicitly convert an 'auto'
958 // which has been deduced to a dependent type into an undeduced 'auto', so
959 // that we'll retry deduction after the transformation.
960 return SemaRef.Context.getAutoType(Deduced, Keyword,
961 /*IsDependent*/ false, /*IsPack=*/false,
962 TypeConstraintConcept,
963 TypeConstraintArgs);
964 }
965
966 /// By default, builds a new DeducedTemplateSpecializationType with the given
967 /// deduced type.
968 QualType RebuildDeducedTemplateSpecializationType(TemplateName Template,
969 QualType Deduced) {
970 return SemaRef.Context.getDeducedTemplateSpecializationType(
971 Template, Deduced, /*IsDependent*/ false);
972 }
973
974 /// Build a new template specialization type.
975 ///
976 /// By default, performs semantic analysis when building the template
977 /// specialization type. Subclasses may override this routine to provide
978 /// different behavior.
979 QualType RebuildTemplateSpecializationType(TemplateName Template,
980 SourceLocation TemplateLoc,
981 TemplateArgumentListInfo &Args);
982
983 /// Build a new parenthesized type.
984 ///
985 /// By default, builds a new ParenType type from the inner type.
986 /// Subclasses may override this routine to provide different behavior.
987 QualType RebuildParenType(QualType InnerType) {
988 return SemaRef.BuildParenType(InnerType);
989 }
990
991 /// Build a new qualified name type.
992 ///
993 /// By default, builds a new ElaboratedType type from the keyword,
994 /// the nested-name-specifier and the named type.
995 /// Subclasses may override this routine to provide different behavior.
996 QualType RebuildElaboratedType(SourceLocation KeywordLoc,
997 ElaboratedTypeKeyword Keyword,
998 NestedNameSpecifierLoc QualifierLoc,
999 QualType Named) {
1000 return SemaRef.Context.getElaboratedType(Keyword,
1001 QualifierLoc.getNestedNameSpecifier(),
1002 Named);
1003 }
1004
1005 /// Build a new typename type that refers to a template-id.
1006 ///
1007 /// By default, builds a new DependentNameType type from the
1008 /// nested-name-specifier and the given type. Subclasses may override
1009 /// this routine to provide different behavior.
1010 QualType RebuildDependentTemplateSpecializationType(
1011 ElaboratedTypeKeyword Keyword,
1012 NestedNameSpecifierLoc QualifierLoc,
1013 SourceLocation TemplateKWLoc,
1014 const IdentifierInfo *Name,
1015 SourceLocation NameLoc,
1016 TemplateArgumentListInfo &Args,
1017 bool AllowInjectedClassName) {
1018 // Rebuild the template name.
1019 // TODO: avoid TemplateName abstraction
1020 CXXScopeSpec SS;
1021 SS.Adopt(QualifierLoc);
1022 TemplateName InstName = getDerived().RebuildTemplateName(
1023 SS, TemplateKWLoc, *Name, NameLoc, QualType(), nullptr,
1024 AllowInjectedClassName);
1025
1026 if (InstName.isNull())
1027 return QualType();
1028
1029 // If it's still dependent, make a dependent specialization.
1030 if (InstName.getAsDependentTemplateName())
1031 return SemaRef.Context.getDependentTemplateSpecializationType(Keyword,
1032 QualifierLoc.getNestedNameSpecifier(),
1033 Name,
1034 Args);
1035
1036 // Otherwise, make an elaborated type wrapping a non-dependent
1037 // specialization.
1038 QualType T =
1039 getDerived().RebuildTemplateSpecializationType(InstName, NameLoc, Args);
1040 if (T.isNull()) return QualType();
1041
1042 if (Keyword == ETK_None && QualifierLoc.getNestedNameSpecifier() == nullptr)
1043 return T;
1044
1045 return SemaRef.Context.getElaboratedType(Keyword,
1046 QualifierLoc.getNestedNameSpecifier(),
1047 T);
1048 }
1049
1050 /// Build a new typename type that refers to an identifier.
1051 ///
1052 /// By default, performs semantic analysis when building the typename type
1053 /// (or elaborated type). Subclasses may override this routine to provide
1054 /// different behavior.
1055 QualType RebuildDependentNameType(ElaboratedTypeKeyword Keyword,
1056 SourceLocation KeywordLoc,
1057 NestedNameSpecifierLoc QualifierLoc,
1058 const IdentifierInfo *Id,
1059 SourceLocation IdLoc,
1060 bool DeducedTSTContext) {
1061 CXXScopeSpec SS;
1062 SS.Adopt(QualifierLoc);
1063
1064 if (QualifierLoc.getNestedNameSpecifier()->isDependent()) {
1065 // If the name is still dependent, just build a new dependent name type.
1066 if (!SemaRef.computeDeclContext(SS))
1067 return SemaRef.Context.getDependentNameType(Keyword,
1068 QualifierLoc.getNestedNameSpecifier(),
1069 Id);
1070 }
1071
1072 if (Keyword == ETK_None || Keyword == ETK_Typename) {
1073 return SemaRef.CheckTypenameType(Keyword, KeywordLoc, QualifierLoc,
1074 *Id, IdLoc, DeducedTSTContext);
1075 }
1076
1077 TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForKeyword(Keyword);
1078
1079 // We had a dependent elaborated-type-specifier that has been transformed
1080 // into a non-dependent elaborated-type-specifier. Find the tag we're
1081 // referring to.
1082 LookupResult Result(SemaRef, Id, IdLoc, Sema::LookupTagName);
1083 DeclContext *DC = SemaRef.computeDeclContext(SS, false);
1084 if (!DC)
1085 return QualType();
1086
1087 if (SemaRef.RequireCompleteDeclContext(SS, DC))
1088 return QualType();
1089
1090 TagDecl *Tag = nullptr;
1091 SemaRef.LookupQualifiedName(Result, DC);
1092 switch (Result.getResultKind()) {
1093 case LookupResult::NotFound:
1094 case LookupResult::NotFoundInCurrentInstantiation:
1095 break;
1096
1097 case LookupResult::Found:
1098 Tag = Result.getAsSingle<TagDecl>();
1099 break;
1100
1101 case LookupResult::FoundOverloaded:
1102 case LookupResult::FoundUnresolvedValue:
1103 llvm_unreachable("Tag lookup cannot find non-tags")::llvm::llvm_unreachable_internal("Tag lookup cannot find non-tags"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/TreeTransform.h"
, 1103)
;
1104
1105 case LookupResult::Ambiguous:
1106 // Let the LookupResult structure handle ambiguities.
1107 return QualType();
1108 }
1109
1110 if (!Tag) {
1111 // Check where the name exists but isn't a tag type and use that to emit
1112 // better diagnostics.
1113 LookupResult Result(SemaRef, Id, IdLoc, Sema::LookupTagName);
1114 SemaRef.LookupQualifiedName(Result, DC);
1115 switch (Result.getResultKind()) {
1116 case LookupResult::Found:
1117 case LookupResult::FoundOverloaded:
1118 case LookupResult::FoundUnresolvedValue: {
1119 NamedDecl *SomeDecl = Result.getRepresentativeDecl();
1120 Sema::NonTagKind NTK = SemaRef.getNonTagTypeDeclKind(SomeDecl, Kind);
1121 SemaRef.Diag(IdLoc, diag::err_tag_reference_non_tag) << SomeDecl
1122 << NTK << Kind;
1123 SemaRef.Diag(SomeDecl->getLocation(), diag::note_declared_at);
1124 break;
1125 }
1126 default:
1127 SemaRef.Diag(IdLoc, diag::err_not_tag_in_scope)
1128 << Kind << Id << DC << QualifierLoc.getSourceRange();
1129 break;
1130 }
1131 return QualType();
1132 }
1133
1134 if (!SemaRef.isAcceptableTagRedeclaration(Tag, Kind, /*isDefinition*/false,
1135 IdLoc, Id)) {
1136 SemaRef.Diag(KeywordLoc, diag::err_use_with_wrong_tag) << Id;
1137 SemaRef.Diag(Tag->getLocation(), diag::note_previous_use);
1138 return QualType();
1139 }
1140
1141 // Build the elaborated-type-specifier type.
1142 QualType T = SemaRef.Context.getTypeDeclType(Tag);
1143 return SemaRef.Context.getElaboratedType(Keyword,
1144 QualifierLoc.getNestedNameSpecifier(),
1145 T);
1146 }
1147
1148 /// Build a new pack expansion type.
1149 ///
1150 /// By default, builds a new PackExpansionType type from the given pattern.
1151 /// Subclasses may override this routine to provide different behavior.
1152 QualType RebuildPackExpansionType(QualType Pattern,
1153 SourceRange PatternRange,
1154 SourceLocation EllipsisLoc,
1155 Optional<unsigned> NumExpansions) {
1156 return getSema().CheckPackExpansion(Pattern, PatternRange, EllipsisLoc,
1157 NumExpansions);
1158 }
1159
1160 /// Build a new atomic type given its value type.
1161 ///
1162 /// By default, performs semantic analysis when building the atomic type.
1163 /// Subclasses may override this routine to provide different behavior.
1164 QualType RebuildAtomicType(QualType ValueType, SourceLocation KWLoc);
1165
1166 /// Build a new pipe type given its value type.
1167 QualType RebuildPipeType(QualType ValueType, SourceLocation KWLoc,
1168 bool isReadPipe);
1169
1170 /// Build a new template name given a nested name specifier, a flag
1171 /// indicating whether the "template" keyword was provided, and the template
1172 /// that the template name refers to.
1173 ///
1174 /// By default, builds the new template name directly. Subclasses may override
1175 /// this routine to provide different behavior.
1176 TemplateName RebuildTemplateName(CXXScopeSpec &SS,
1177 bool TemplateKW,
1178 TemplateDecl *Template);
1179
1180 /// Build a new template name given a nested name specifier and the
1181 /// name that is referred to as a template.
1182 ///
1183 /// By default, performs semantic analysis to determine whether the name can
1184 /// be resolved to a specific template, then builds the appropriate kind of
1185 /// template name. Subclasses may override this routine to provide different
1186 /// behavior.
1187 TemplateName RebuildTemplateName(CXXScopeSpec &SS,
1188 SourceLocation TemplateKWLoc,
1189 const IdentifierInfo &Name,
1190 SourceLocation NameLoc, QualType ObjectType,
1191 NamedDecl *FirstQualifierInScope,
1192 bool AllowInjectedClassName);
1193
1194 /// Build a new template name given a nested name specifier and the
1195 /// overloaded operator name that is referred to as a template.
1196 ///
1197 /// By default, performs semantic analysis to determine whether the name can
1198 /// be resolved to a specific template, then builds the appropriate kind of
1199 /// template name. Subclasses may override this routine to provide different
1200 /// behavior.
1201 TemplateName RebuildTemplateName(CXXScopeSpec &SS,
1202 SourceLocation TemplateKWLoc,
1203 OverloadedOperatorKind Operator,
1204 SourceLocation NameLoc, QualType ObjectType,
1205 bool AllowInjectedClassName);
1206
1207 /// Build a new template name given a template template parameter pack
1208 /// and the
1209 ///
1210 /// By default, performs semantic analysis to determine whether the name can
1211 /// be resolved to a specific template, then builds the appropriate kind of
1212 /// template name. Subclasses may override this routine to provide different
1213 /// behavior.
1214 TemplateName RebuildTemplateName(TemplateTemplateParmDecl *Param,
1215 const TemplateArgument &ArgPack) {
1216 return getSema().Context.getSubstTemplateTemplateParmPack(Param, ArgPack);
1217 }
1218
1219 /// Build a new compound statement.
1220 ///
1221 /// By default, performs semantic analysis to build the new statement.
1222 /// Subclasses may override this routine to provide different behavior.
1223 StmtResult RebuildCompoundStmt(SourceLocation LBraceLoc,
1224 MultiStmtArg Statements,
1225 SourceLocation RBraceLoc,
1226 bool IsStmtExpr) {
1227 return getSema().ActOnCompoundStmt(LBraceLoc, RBraceLoc, Statements,
1228 IsStmtExpr);
1229 }
1230
1231 /// Build a new case statement.
1232 ///
1233 /// By default, performs semantic analysis to build the new statement.
1234 /// Subclasses may override this routine to provide different behavior.
1235 StmtResult RebuildCaseStmt(SourceLocation CaseLoc,
1236 Expr *LHS,
1237 SourceLocation EllipsisLoc,
1238 Expr *RHS,
1239 SourceLocation ColonLoc) {
1240 return getSema().ActOnCaseStmt(CaseLoc, LHS, EllipsisLoc, RHS,
1241 ColonLoc);
1242 }
1243
1244 /// Attach the body to a new case statement.
1245 ///
1246 /// By default, performs semantic analysis to build the new statement.
1247 /// Subclasses may override this routine to provide different behavior.
1248 StmtResult RebuildCaseStmtBody(Stmt *S, Stmt *Body) {
1249 getSema().ActOnCaseStmtBody(S, Body);
1250 return S;
1251 }
1252
1253 /// Build a new default statement.
1254 ///
1255 /// By default, performs semantic analysis to build the new statement.
1256 /// Subclasses may override this routine to provide different behavior.
1257 StmtResult RebuildDefaultStmt(SourceLocation DefaultLoc,
1258 SourceLocation ColonLoc,
1259 Stmt *SubStmt) {
1260 return getSema().ActOnDefaultStmt(DefaultLoc, ColonLoc, SubStmt,
1261 /*CurScope=*/nullptr);
1262 }
1263
1264 /// Build a new label statement.
1265 ///
1266 /// By default, performs semantic analysis to build the new statement.
1267 /// Subclasses may override this routine to provide different behavior.
1268 StmtResult RebuildLabelStmt(SourceLocation IdentLoc, LabelDecl *L,
1269 SourceLocation ColonLoc, Stmt *SubStmt) {
1270 return SemaRef.ActOnLabelStmt(IdentLoc, L, ColonLoc, SubStmt);
1271 }
1272
1273 /// Build a new label statement.
1274 ///
1275 /// By default, performs semantic analysis to build the new statement.
1276 /// Subclasses may override this routine to provide different behavior.
1277 StmtResult RebuildAttributedStmt(SourceLocation AttrLoc,
1278 ArrayRef<const Attr*> Attrs,
1279 Stmt *SubStmt) {
1280 return SemaRef.ActOnAttributedStmt(AttrLoc, Attrs, SubStmt);
1281 }
1282
1283 /// Build a new "if" statement.
1284 ///
1285 /// By default, performs semantic analysis to build the new statement.
1286 /// Subclasses may override this routine to provide different behavior.
1287 StmtResult RebuildIfStmt(SourceLocation IfLoc, bool IsConstexpr,
1288 Sema::ConditionResult Cond, Stmt *Init, Stmt *Then,
1289 SourceLocation ElseLoc, Stmt *Else) {
1290 return getSema().ActOnIfStmt(IfLoc, IsConstexpr, Init, Cond, Then,
1291 ElseLoc, Else);
1292 }
1293
1294 /// Start building a new switch statement.
1295 ///
1296 /// By default, performs semantic analysis to build the new statement.
1297 /// Subclasses may override this routine to provide different behavior.
1298 StmtResult RebuildSwitchStmtStart(SourceLocation SwitchLoc, Stmt *Init,
1299 Sema::ConditionResult Cond) {
1300 return getSema().ActOnStartOfSwitchStmt(SwitchLoc, Init, Cond);
1301 }
1302
1303 /// Attach the body to the switch statement.
1304 ///
1305 /// By default, performs semantic analysis to build the new statement.
1306 /// Subclasses may override this routine to provide different behavior.
1307 StmtResult RebuildSwitchStmtBody(SourceLocation SwitchLoc,
1308 Stmt *Switch, Stmt *Body) {
1309 return getSema().ActOnFinishSwitchStmt(SwitchLoc, Switch, Body);
1310 }
1311
1312 /// Build a new while statement.
1313 ///
1314 /// By default, performs semantic analysis to build the new statement.
1315 /// Subclasses may override this routine to provide different behavior.
1316 StmtResult RebuildWhileStmt(SourceLocation WhileLoc,
1317 Sema::ConditionResult Cond, Stmt *Body) {
1318 return getSema().ActOnWhileStmt(WhileLoc, Cond, Body);
1319 }
1320
1321 /// Build a new do-while statement.
1322 ///
1323 /// By default, performs semantic analysis to build the new statement.
1324 /// Subclasses may override this routine to provide different behavior.
1325 StmtResult RebuildDoStmt(SourceLocation DoLoc, Stmt *Body,
1326 SourceLocation WhileLoc, SourceLocation LParenLoc,
1327 Expr *Cond, SourceLocation RParenLoc) {
1328 return getSema().ActOnDoStmt(DoLoc, Body, WhileLoc, LParenLoc,
1329 Cond, RParenLoc);
1330 }
1331
1332 /// Build a new for statement.
1333 ///
1334 /// By default, performs semantic analysis to build the new statement.
1335 /// Subclasses may override this routine to provide different behavior.
1336 StmtResult RebuildForStmt(SourceLocation ForLoc, SourceLocation LParenLoc,
1337 Stmt *Init, Sema::ConditionResult Cond,
1338 Sema::FullExprArg Inc, SourceLocation RParenLoc,
1339 Stmt *Body) {
1340 return getSema().ActOnForStmt(ForLoc, LParenLoc, Init, Cond,
1341 Inc, RParenLoc, Body);
1342 }
1343
1344 /// Build a new goto statement.
1345 ///
1346 /// By default, performs semantic analysis to build the new statement.
1347 /// Subclasses may override this routine to provide different behavior.
1348 StmtResult RebuildGotoStmt(SourceLocation GotoLoc, SourceLocation LabelLoc,
1349 LabelDecl *Label) {
1350 return getSema().ActOnGotoStmt(GotoLoc, LabelLoc, Label);
1351 }
1352
1353 /// Build a new indirect goto statement.
1354 ///
1355 /// By default, performs semantic analysis to build the new statement.
1356 /// Subclasses may override this routine to provide different behavior.
1357 StmtResult RebuildIndirectGotoStmt(SourceLocation GotoLoc,
1358 SourceLocation StarLoc,
1359 Expr *Target) {
1360 return getSema().ActOnIndirectGotoStmt(GotoLoc, StarLoc, Target);
1361 }
1362
1363 /// Build a new return statement.
1364 ///
1365 /// By default, performs semantic analysis to build the new statement.
1366 /// Subclasses may override this routine to provide different behavior.
1367 StmtResult RebuildReturnStmt(SourceLocation ReturnLoc, Expr *Result) {
1368 return getSema().BuildReturnStmt(ReturnLoc, Result);
1369 }
1370
1371 /// Build a new declaration statement.
1372 ///
1373 /// By default, performs semantic analysis to build the new statement.
1374 /// Subclasses may override this routine to provide different behavior.
1375 StmtResult RebuildDeclStmt(MutableArrayRef<Decl *> Decls,
1376 SourceLocation StartLoc, SourceLocation EndLoc) {
1377 Sema::DeclGroupPtrTy DG = getSema().BuildDeclaratorGroup(Decls);
1378 return getSema().ActOnDeclStmt(DG, StartLoc, EndLoc);
1379 }
1380
1381 /// Build a new inline asm statement.
1382 ///
1383 /// By default, performs semantic analysis to build the new statement.
1384 /// Subclasses may override this routine to provide different behavior.
1385 StmtResult RebuildGCCAsmStmt(SourceLocation AsmLoc, bool IsSimple,
1386 bool IsVolatile, unsigned NumOutputs,
1387 unsigned NumInputs, IdentifierInfo **Names,
1388 MultiExprArg Constraints, MultiExprArg Exprs,
1389 Expr *AsmString, MultiExprArg Clobbers,
1390 unsigned NumLabels,
1391 SourceLocation RParenLoc) {
1392 return getSema().ActOnGCCAsmStmt(AsmLoc, IsSimple, IsVolatile, NumOutputs,
1393 NumInputs, Names, Constraints, Exprs,
1394 AsmString, Clobbers, NumLabels, RParenLoc);
1395 }
1396
1397 /// Build a new MS style inline asm statement.
1398 ///
1399 /// By default, performs semantic analysis to build the new statement.
1400 /// Subclasses may override this routine to provide different behavior.
1401 StmtResult RebuildMSAsmStmt(SourceLocation AsmLoc, SourceLocation LBraceLoc,
1402 ArrayRef<Token> AsmToks,
1403 StringRef AsmString,
1404 unsigned NumOutputs, unsigned NumInputs,
1405 ArrayRef<StringRef> Constraints,
1406 ArrayRef<StringRef> Clobbers,
1407 ArrayRef<Expr*> Exprs,
1408 SourceLocation EndLoc) {
1409 return getSema().ActOnMSAsmStmt(AsmLoc, LBraceLoc, AsmToks, AsmString,
1410 NumOutputs, NumInputs,
1411 Constraints, Clobbers, Exprs, EndLoc);
1412 }
1413
1414 /// Build a new co_return statement.
1415 ///
1416 /// By default, performs semantic analysis to build the new statement.
1417 /// Subclasses may override this routine to provide different behavior.
1418 StmtResult RebuildCoreturnStmt(SourceLocation CoreturnLoc, Expr *Result,
1419 bool IsImplicit) {
1420 return getSema().BuildCoreturnStmt(CoreturnLoc, Result, IsImplicit);
1421 }
1422
1423 /// Build a new co_await expression.
1424 ///
1425 /// By default, performs semantic analysis to build the new expression.
1426 /// Subclasses may override this routine to provide different behavior.
1427 ExprResult RebuildCoawaitExpr(SourceLocation CoawaitLoc, Expr *Result,
1428 bool IsImplicit) {
1429 return getSema().BuildResolvedCoawaitExpr(CoawaitLoc, Result, IsImplicit);
1430 }
1431
1432 /// Build a new co_await expression.
1433 ///
1434 /// By default, performs semantic analysis to build the new expression.
1435 /// Subclasses may override this routine to provide different behavior.
1436 ExprResult RebuildDependentCoawaitExpr(SourceLocation CoawaitLoc,
1437 Expr *Result,
1438 UnresolvedLookupExpr *Lookup) {
1439 return getSema().BuildUnresolvedCoawaitExpr(CoawaitLoc, Result, Lookup);
1440 }
1441
1442 /// Build a new co_yield expression.
1443 ///
1444 /// By default, performs semantic analysis to build the new expression.
1445 /// Subclasses may override this routine to provide different behavior.
1446 ExprResult RebuildCoyieldExpr(SourceLocation CoyieldLoc, Expr *Result) {
1447 return getSema().BuildCoyieldExpr(CoyieldLoc, Result);
1448 }
1449
1450 StmtResult RebuildCoroutineBodyStmt(CoroutineBodyStmt::CtorArgs Args) {
1451 return getSema().BuildCoroutineBodyStmt(Args);
1452 }
1453
1454 /// Build a new Objective-C \@try statement.
1455 ///
1456 /// By default, performs semantic analysis to build the new statement.
1457 /// Subclasses may override this routine to provide different behavior.
1458 StmtResult RebuildObjCAtTryStmt(SourceLocation AtLoc,
1459 Stmt *TryBody,
1460 MultiStmtArg CatchStmts,
1461 Stmt *Finally) {
1462 return getSema().ActOnObjCAtTryStmt(AtLoc, TryBody, CatchStmts,
1463 Finally);
1464 }
1465
1466 /// Rebuild an Objective-C exception declaration.
1467 ///
1468 /// By default, performs semantic analysis to build the new declaration.
1469 /// Subclasses may override this routine to provide different behavior.
1470 VarDecl *RebuildObjCExceptionDecl(VarDecl *ExceptionDecl,
1471 TypeSourceInfo *TInfo, QualType T) {
1472 return getSema().BuildObjCExceptionDecl(TInfo, T,
1473 ExceptionDecl->getInnerLocStart(),
1474 ExceptionDecl->getLocation(),
1475 ExceptionDecl->getIdentifier());
1476 }
1477
1478 /// Build a new Objective-C \@catch statement.
1479 ///
1480 /// By default, performs semantic analysis to build the new statement.
1481 /// Subclasses may override this routine to provide different behavior.
1482 StmtResult RebuildObjCAtCatchStmt(SourceLocation AtLoc,
1483 SourceLocation RParenLoc,
1484 VarDecl *Var,
1485 Stmt *Body) {
1486 return getSema().ActOnObjCAtCatchStmt(AtLoc, RParenLoc,
1487 Var, Body);
1488 }
1489
1490 /// Build a new Objective-C \@finally statement.
1491 ///
1492 /// By default, performs semantic analysis to build the new statement.
1493 /// Subclasses may override this routine to provide different behavior.
1494 StmtResult RebuildObjCAtFinallyStmt(SourceLocation AtLoc,
1495 Stmt *Body) {
1496 return getSema().ActOnObjCAtFinallyStmt(AtLoc, Body);
1497 }
1498
1499 /// Build a new Objective-C \@throw statement.
1500 ///
1501 /// By default, performs semantic analysis to build the new statement.
1502 /// Subclasses may override this routine to provide different behavior.
1503 StmtResult RebuildObjCAtThrowStmt(SourceLocation AtLoc,
1504 Expr *Operand) {
1505 return getSema().BuildObjCAtThrowStmt(AtLoc, Operand);
1506 }
1507
1508 /// Build a new OpenMP executable directive.
1509 ///
1510 /// By default, performs semantic analysis to build the new statement.
1511 /// Subclasses may override this routine to provide different behavior.
1512 StmtResult RebuildOMPExecutableDirective(OpenMPDirectiveKind Kind,
1513 DeclarationNameInfo DirName,
1514 OpenMPDirectiveKind CancelRegion,
1515 ArrayRef<OMPClause *> Clauses,
1516 Stmt *AStmt, SourceLocation StartLoc,
1517 SourceLocation EndLoc) {
1518 return getSema().ActOnOpenMPExecutableDirective(
1519 Kind, DirName, CancelRegion, Clauses, AStmt, StartLoc, EndLoc);
1520 }
1521
1522 /// Build a new OpenMP 'if' clause.
1523 ///
1524 /// By default, performs semantic analysis to build the new OpenMP clause.
1525 /// Subclasses may override this routine to provide different behavior.
1526 OMPClause *RebuildOMPIfClause(OpenMPDirectiveKind NameModifier,
1527 Expr *Condition, SourceLocation StartLoc,
1528 SourceLocation LParenLoc,
1529 SourceLocation NameModifierLoc,
1530 SourceLocation ColonLoc,
1531 SourceLocation EndLoc) {
1532 return getSema().ActOnOpenMPIfClause(NameModifier, Condition, StartLoc,
1533 LParenLoc, NameModifierLoc, ColonLoc,
1534 EndLoc);
1535 }
1536
1537 /// Build a new OpenMP 'final' clause.
1538 ///
1539 /// By default, performs semantic analysis to build the new OpenMP clause.
1540 /// Subclasses may override this routine to provide different behavior.
1541 OMPClause *RebuildOMPFinalClause(Expr *Condition, SourceLocation StartLoc,
1542 SourceLocation LParenLoc,
1543 SourceLocation EndLoc) {
1544 return getSema().ActOnOpenMPFinalClause(Condition, StartLoc, LParenLoc,
1545 EndLoc);
1546 }
1547
1548 /// Build a new OpenMP 'num_threads' clause.
1549 ///
1550 /// By default, performs semantic analysis to build the new OpenMP clause.
1551 /// Subclasses may override this routine to provide different behavior.
1552 OMPClause *RebuildOMPNumThreadsClause(Expr *NumThreads,
1553 SourceLocation StartLoc,
1554 SourceLocation LParenLoc,
1555 SourceLocation EndLoc) {
1556 return getSema().ActOnOpenMPNumThreadsClause(NumThreads, StartLoc,
1557 LParenLoc, EndLoc);
1558 }
1559
1560 /// Build a new OpenMP 'safelen' clause.
1561 ///
1562 /// By default, performs semantic analysis to build the new OpenMP clause.
1563 /// Subclasses may override this routine to provide different behavior.
1564 OMPClause *RebuildOMPSafelenClause(Expr *Len, SourceLocation StartLoc,
1565 SourceLocation LParenLoc,
1566 SourceLocation EndLoc) {
1567 return getSema().ActOnOpenMPSafelenClause(Len, StartLoc, LParenLoc, EndLoc);
1568 }
1569
1570 /// Build a new OpenMP 'simdlen' clause.
1571 ///
1572 /// By default, performs semantic analysis to build the new OpenMP clause.
1573 /// Subclasses may override this routine to provide different behavior.
1574 OMPClause *RebuildOMPSimdlenClause(Expr *Len, SourceLocation StartLoc,
1575 SourceLocation LParenLoc,
1576 SourceLocation EndLoc) {
1577 return getSema().ActOnOpenMPSimdlenClause(Len, StartLoc, LParenLoc, EndLoc);
1578 }
1579
1580 /// Build a new OpenMP 'allocator' clause.
1581 ///
1582 /// By default, performs semantic analysis to build the new OpenMP clause.
1583 /// Subclasses may override this routine to provide different behavior.
1584 OMPClause *RebuildOMPAllocatorClause(Expr *A, SourceLocation StartLoc,
1585 SourceLocation LParenLoc,
1586 SourceLocation EndLoc) {
1587 return getSema().ActOnOpenMPAllocatorClause(A, StartLoc, LParenLoc, EndLoc);
1588 }
1589
1590 /// Build a new OpenMP 'collapse' clause.
1591 ///
1592 /// By default, performs semantic analysis to build the new OpenMP clause.
1593 /// Subclasses may override this routine to provide different behavior.
1594 OMPClause *RebuildOMPCollapseClause(Expr *Num, SourceLocation StartLoc,
1595 SourceLocation LParenLoc,
1596 SourceLocation EndLoc) {
1597 return getSema().ActOnOpenMPCollapseClause(Num, StartLoc, LParenLoc,
1598 EndLoc);
1599 }
1600
1601 /// Build a new OpenMP 'default' clause.
1602 ///
1603 /// By default, performs semantic analysis to build the new OpenMP clause.
1604 /// Subclasses may override this routine to provide different behavior.
1605 OMPClause *RebuildOMPDefaultClause(DefaultKind Kind, SourceLocation KindKwLoc,
1606 SourceLocation StartLoc,
1607 SourceLocation LParenLoc,
1608 SourceLocation EndLoc) {
1609 return getSema().ActOnOpenMPDefaultClause(Kind, KindKwLoc,
1610 StartLoc, LParenLoc, EndLoc);
1611 }
1612
1613 /// Build a new OpenMP 'proc_bind' clause.
1614 ///
1615 /// By default, performs semantic analysis to build the new OpenMP clause.
1616 /// Subclasses may override this routine to provide different behavior.
1617 OMPClause *RebuildOMPProcBindClause(ProcBindKind Kind,
1618 SourceLocation KindKwLoc,
1619 SourceLocation StartLoc,
1620 SourceLocation LParenLoc,
1621 SourceLocation EndLoc) {
1622 return getSema().ActOnOpenMPProcBindClause(Kind, KindKwLoc,
1623 StartLoc, LParenLoc, EndLoc);
1624 }
1625
1626 /// Build a new OpenMP 'schedule' clause.
1627 ///
1628 /// By default, performs semantic analysis to build the new OpenMP clause.
1629 /// Subclasses may override this routine to provide different behavior.
1630 OMPClause *RebuildOMPScheduleClause(
1631 OpenMPScheduleClauseModifier M1, OpenMPScheduleClauseModifier M2,
1632 OpenMPScheduleClauseKind Kind, Expr *ChunkSize, SourceLocation StartLoc,
1633 SourceLocation LParenLoc, SourceLocation M1Loc, SourceLocation M2Loc,
1634 SourceLocation KindLoc, SourceLocation CommaLoc, SourceLocation EndLoc) {
1635 return getSema().ActOnOpenMPScheduleClause(
1636 M1, M2, Kind, ChunkSize, StartLoc, LParenLoc, M1Loc, M2Loc, KindLoc,
1637 CommaLoc, EndLoc);
1638 }
1639
1640 /// Build a new OpenMP 'ordered' clause.
1641 ///
1642 /// By default, performs semantic analysis to build the new OpenMP clause.
1643 /// Subclasses may override this routine to provide different behavior.
1644 OMPClause *RebuildOMPOrderedClause(SourceLocation StartLoc,
1645 SourceLocation EndLoc,
1646 SourceLocation LParenLoc, Expr *Num) {
1647 return getSema().ActOnOpenMPOrderedClause(StartLoc, EndLoc, LParenLoc, Num);
1648 }
1649
1650 /// Build a new OpenMP 'private' clause.
1651 ///
1652 /// By default, performs semantic analysis to build the new OpenMP clause.
1653 /// Subclasses may override this routine to provide different behavior.
1654 OMPClause *RebuildOMPPrivateClause(ArrayRef<Expr *> VarList,
1655 SourceLocation StartLoc,
1656 SourceLocation LParenLoc,
1657 SourceLocation EndLoc) {
1658 return getSema().ActOnOpenMPPrivateClause(VarList, StartLoc, LParenLoc,
1659 EndLoc);
1660 }
1661
1662 /// Build a new OpenMP 'firstprivate' clause.
1663 ///
1664 /// By default, performs semantic analysis to build the new OpenMP clause.
1665 /// Subclasses may override this routine to provide different behavior.
1666 OMPClause *RebuildOMPFirstprivateClause(ArrayRef<Expr *> VarList,
1667 SourceLocation StartLoc,
1668 SourceLocation LParenLoc,
1669 SourceLocation EndLoc) {
1670 return getSema().ActOnOpenMPFirstprivateClause(VarList, StartLoc, LParenLoc,
1671 EndLoc);
1672 }
1673
1674 /// Build a new OpenMP 'lastprivate' clause.
1675 ///
1676 /// By default, performs semantic analysis to build the new OpenMP clause.
1677 /// Subclasses may override this routine to provide different behavior.
1678 OMPClause *RebuildOMPLastprivateClause(ArrayRef<Expr *> VarList,
1679 OpenMPLastprivateModifier LPKind,
1680 SourceLocation LPKindLoc,
1681 SourceLocation ColonLoc,
1682 SourceLocation StartLoc,
1683 SourceLocation LParenLoc,
1684 SourceLocation EndLoc) {
1685 return getSema().ActOnOpenMPLastprivateClause(
1686 VarList, LPKind, LPKindLoc, ColonLoc, StartLoc, LParenLoc, EndLoc);
1687 }
1688
1689 /// Build a new OpenMP 'shared' clause.
1690 ///
1691 /// By default, performs semantic analysis to build the new OpenMP clause.
1692 /// Subclasses may override this routine to provide different behavior.
1693 OMPClause *RebuildOMPSharedClause(ArrayRef<Expr *> VarList,
1694 SourceLocation StartLoc,
1695 SourceLocation LParenLoc,
1696 SourceLocation EndLoc) {
1697 return getSema().ActOnOpenMPSharedClause(VarList, StartLoc, LParenLoc,
1698 EndLoc);
1699 }
1700
1701 /// Build a new OpenMP 'reduction' clause.
1702 ///
1703 /// By default, performs semantic analysis to build the new statement.
1704 /// Subclasses may override this routine to provide different behavior.
1705 OMPClause *RebuildOMPReductionClause(ArrayRef<Expr *> VarList,
1706 SourceLocation StartLoc,
1707 SourceLocation LParenLoc,
1708 SourceLocation ColonLoc,
1709 SourceLocation EndLoc,
1710 CXXScopeSpec &ReductionIdScopeSpec,
1711 const DeclarationNameInfo &ReductionId,
1712 ArrayRef<Expr *> UnresolvedReductions) {
1713 return getSema().ActOnOpenMPReductionClause(
1714 VarList, StartLoc, LParenLoc, ColonLoc, EndLoc, ReductionIdScopeSpec,
1715 ReductionId, UnresolvedReductions);
1716 }
1717
1718 /// Build a new OpenMP 'task_reduction' clause.
1719 ///
1720 /// By default, performs semantic analysis to build the new statement.
1721 /// Subclasses may override this routine to provide different behavior.
1722 OMPClause *RebuildOMPTaskReductionClause(
1723 ArrayRef<Expr *> VarList, SourceLocation StartLoc,
1724 SourceLocation LParenLoc, SourceLocation ColonLoc, SourceLocation EndLoc,
1725 CXXScopeSpec &ReductionIdScopeSpec,
1726 const DeclarationNameInfo &ReductionId,
1727 ArrayRef<Expr *> UnresolvedReductions) {
1728 return getSema().ActOnOpenMPTaskReductionClause(
1729 VarList, StartLoc, LParenLoc, ColonLoc, EndLoc, ReductionIdScopeSpec,
1730 ReductionId, UnresolvedReductions);
1731 }
1732
1733 /// Build a new OpenMP 'in_reduction' clause.
1734 ///
1735 /// By default, performs semantic analysis to build the new statement.
1736 /// Subclasses may override this routine to provide different behavior.
1737 OMPClause *
1738 RebuildOMPInReductionClause(ArrayRef<Expr *> VarList, SourceLocation StartLoc,
1739 SourceLocation LParenLoc, SourceLocation ColonLoc,
1740 SourceLocation EndLoc,
1741 CXXScopeSpec &ReductionIdScopeSpec,
1742 const DeclarationNameInfo &ReductionId,
1743 ArrayRef<Expr *> UnresolvedReductions) {
1744 return getSema().ActOnOpenMPInReductionClause(
1745 VarList, StartLoc, LParenLoc, ColonLoc, EndLoc, ReductionIdScopeSpec,
1746 ReductionId, UnresolvedReductions);
1747 }
1748
1749 /// Build a new OpenMP 'linear' clause.
1750 ///
1751 /// By default, performs semantic analysis to build the new OpenMP clause.
1752 /// Subclasses may override this routine to provide different behavior.
1753 OMPClause *RebuildOMPLinearClause(ArrayRef<Expr *> VarList, Expr *Step,
1754 SourceLocation StartLoc,
1755 SourceLocation LParenLoc,
1756 OpenMPLinearClauseKind Modifier,
1757 SourceLocation ModifierLoc,
1758 SourceLocation ColonLoc,
1759 SourceLocation EndLoc) {
1760 return getSema().ActOnOpenMPLinearClause(VarList, Step, StartLoc, LParenLoc,
1761 Modifier, ModifierLoc, ColonLoc,
1762 EndLoc);
1763 }
1764
1765 /// Build a new OpenMP 'aligned' clause.
1766 ///
1767 /// By default, performs semantic analysis to build the new OpenMP clause.
1768 /// Subclasses may override this routine to provide different behavior.
1769 OMPClause *RebuildOMPAlignedClause(ArrayRef<Expr *> VarList, Expr *Alignment,
1770 SourceLocation StartLoc,
1771 SourceLocation LParenLoc,
1772 SourceLocation ColonLoc,
1773 SourceLocation EndLoc) {
1774 return getSema().ActOnOpenMPAlignedClause(VarList, Alignment, StartLoc,
1775 LParenLoc, ColonLoc, EndLoc);
1776 }
1777
1778 /// Build a new OpenMP 'copyin' clause.
1779 ///
1780 /// By default, performs semantic analysis to build the new OpenMP clause.
1781 /// Subclasses may override this routine to provide different behavior.
1782 OMPClause *RebuildOMPCopyinClause(ArrayRef<Expr *> VarList,
1783 SourceLocation StartLoc,
1784 SourceLocation LParenLoc,
1785 SourceLocation EndLoc) {
1786 return getSema().ActOnOpenMPCopyinClause(VarList, StartLoc, LParenLoc,
1787 EndLoc);
1788 }
1789
1790 /// Build a new OpenMP 'copyprivate' clause.
1791 ///
1792 /// By default, performs semantic analysis to build the new OpenMP clause.
1793 /// Subclasses may override this routine to provide different behavior.
1794 OMPClause *RebuildOMPCopyprivateClause(ArrayRef<Expr *> VarList,
1795 SourceLocation StartLoc,
1796 SourceLocation LParenLoc,
1797 SourceLocation EndLoc) {
1798 return getSema().ActOnOpenMPCopyprivateClause(VarList, StartLoc, LParenLoc,
1799 EndLoc);
1800 }
1801
1802 /// Build a new OpenMP 'flush' pseudo clause.
1803 ///
1804 /// By default, performs semantic analysis to build the new OpenMP clause.
1805 /// Subclasses may override this routine to provide different behavior.
1806 OMPClause *RebuildOMPFlushClause(ArrayRef<Expr *> VarList,
1807 SourceLocation StartLoc,
1808 SourceLocation LParenLoc,
1809 SourceLocation EndLoc) {
1810 return getSema().ActOnOpenMPFlushClause(VarList, StartLoc, LParenLoc,
1811 EndLoc);
1812 }
1813
1814 /// Build a new OpenMP 'depobj' pseudo clause.
1815 ///
1816 /// By default, performs semantic analysis to build the new OpenMP clause.
1817 /// Subclasses may override this routine to provide different behavior.
1818 OMPClause *RebuildOMPDepobjClause(Expr *Depobj, SourceLocation StartLoc,
1819 SourceLocation LParenLoc,
1820 SourceLocation EndLoc) {
1821 return getSema().ActOnOpenMPDepobjClause(Depobj, StartLoc, LParenLoc,
1822 EndLoc);
1823 }
1824
1825 /// Build a new OpenMP 'depend' pseudo clause.
1826 ///
1827 /// By default, performs semantic analysis to build the new OpenMP clause.
1828 /// Subclasses may override this routine to provide different behavior.
1829 OMPClause *
1830 RebuildOMPDependClause(OpenMPDependClauseKind DepKind, SourceLocation DepLoc,
1831 SourceLocation ColonLoc, ArrayRef<Expr *> VarList,
1832 SourceLocation StartLoc, SourceLocation LParenLoc,
1833 SourceLocation EndLoc) {
1834 return getSema().ActOnOpenMPDependClause(DepKind, DepLoc, ColonLoc, VarList,
1835 StartLoc, LParenLoc, EndLoc);
1836 }
1837
1838 /// Build a new OpenMP 'device' clause.
1839 ///
1840 /// By default, performs semantic analysis to build the new statement.
1841 /// Subclasses may override this routine to provide different behavior.
1842 OMPClause *RebuildOMPDeviceClause(Expr *Device, SourceLocation StartLoc,
1843 SourceLocation LParenLoc,
1844 SourceLocation EndLoc) {
1845 return getSema().ActOnOpenMPDeviceClause(Device, StartLoc, LParenLoc,
1846 EndLoc);
1847 }
1848
1849 /// Build a new OpenMP 'map' clause.
1850 ///
1851 /// By default, performs semantic analysis to build the new OpenMP clause.
1852 /// Subclasses may override this routine to provide different behavior.
1853 OMPClause *RebuildOMPMapClause(
1854 ArrayRef<OpenMPMapModifierKind> MapTypeModifiers,
1855 ArrayRef<SourceLocation> MapTypeModifiersLoc,
1856 CXXScopeSpec MapperIdScopeSpec, DeclarationNameInfo MapperId,
1857 OpenMPMapClauseKind MapType, bool IsMapTypeImplicit,
1858 SourceLocation MapLoc, SourceLocation ColonLoc, ArrayRef<Expr *> VarList,
1859 const OMPVarListLocTy &Locs, ArrayRef<Expr *> UnresolvedMappers) {
1860 return getSema().ActOnOpenMPMapClause(MapTypeModifiers, MapTypeModifiersLoc,
1861 MapperIdScopeSpec, MapperId, MapType,
1862 IsMapTypeImplicit, MapLoc, ColonLoc,
1863 VarList, Locs, UnresolvedMappers);
1864 }
1865
1866 /// Build a new OpenMP 'allocate' clause.
1867 ///
1868 /// By default, performs semantic analysis to build the new OpenMP clause.
1869 /// Subclasses may override this routine to provide different behavior.
1870 OMPClause *RebuildOMPAllocateClause(Expr *Allocate, ArrayRef<Expr *> VarList,
1871 SourceLocation StartLoc,
1872 SourceLocation LParenLoc,
1873 SourceLocation ColonLoc,
1874 SourceLocation EndLoc) {
1875 return getSema().ActOnOpenMPAllocateClause(Allocate, VarList, StartLoc,
1876 LParenLoc, ColonLoc, EndLoc);
1877 }
1878
1879 /// Build a new OpenMP 'num_teams' clause.
1880 ///
1881 /// By default, performs semantic analysis to build the new statement.
1882 /// Subclasses may override this routine to provide different behavior.
1883 OMPClause *RebuildOMPNumTeamsClause(Expr *NumTeams, SourceLocation StartLoc,
1884 SourceLocation LParenLoc,
1885 SourceLocation EndLoc) {
1886 return getSema().ActOnOpenMPNumTeamsClause(NumTeams, StartLoc, LParenLoc,
1887 EndLoc);
1888 }
1889
1890 /// Build a new OpenMP 'thread_limit' clause.
1891 ///
1892 /// By default, performs semantic analysis to build the new statement.
1893 /// Subclasses may override this routine to provide different behavior.
1894 OMPClause *RebuildOMPThreadLimitClause(Expr *ThreadLimit,
1895 SourceLocation StartLoc,
1896 SourceLocation LParenLoc,
1897 SourceLocation EndLoc) {
1898 return getSema().ActOnOpenMPThreadLimitClause(ThreadLimit, StartLoc,
1899 LParenLoc, EndLoc);
1900 }
1901
1902 /// Build a new OpenMP 'priority' clause.
1903 ///
1904 /// By default, performs semantic analysis to build the new statement.
1905 /// Subclasses may override this routine to provide different behavior.
1906 OMPClause *RebuildOMPPriorityClause(Expr *Priority, SourceLocation StartLoc,
1907 SourceLocation LParenLoc,
1908 SourceLocation EndLoc) {
1909 return getSema().ActOnOpenMPPriorityClause(Priority, StartLoc, LParenLoc,
1910 EndLoc);
1911 }
1912
1913 /// Build a new OpenMP 'grainsize' clause.
1914 ///
1915 /// By default, performs semantic analysis to build the new statement.
1916 /// Subclasses may override this routine to provide different behavior.
1917 OMPClause *RebuildOMPGrainsizeClause(Expr *Grainsize, SourceLocation StartLoc,
1918 SourceLocation LParenLoc,
1919 SourceLocation EndLoc) {
1920 return getSema().ActOnOpenMPGrainsizeClause(Grainsize, StartLoc, LParenLoc,
1921 EndLoc);
1922 }
1923
1924 /// Build a new OpenMP 'num_tasks' clause.
1925 ///
1926 /// By default, performs semantic analysis to build the new statement.
1927 /// Subclasses may override this routine to provide different behavior.
1928 OMPClause *RebuildOMPNumTasksClause(Expr *NumTasks, SourceLocation StartLoc,
1929 SourceLocation LParenLoc,
1930 SourceLocation EndLoc) {
1931 return getSema().ActOnOpenMPNumTasksClause(NumTasks, StartLoc, LParenLoc,
1932 EndLoc);
1933 }
1934
1935 /// Build a new OpenMP 'hint' clause.
1936 ///
1937 /// By default, performs semantic analysis to build the new statement.
1938 /// Subclasses may override this routine to provide different behavior.
1939 OMPClause *RebuildOMPHintClause(Expr *Hint, SourceLocation StartLoc,
1940 SourceLocation LParenLoc,
1941 SourceLocation EndLoc) {
1942 return getSema().ActOnOpenMPHintClause(Hint, StartLoc, LParenLoc, EndLoc);
1943 }
1944
1945 /// Build a new OpenMP 'dist_schedule' clause.
1946 ///
1947 /// By default, performs semantic analysis to build the new OpenMP clause.
1948 /// Subclasses may override this routine to provide different behavior.
1949 OMPClause *
1950 RebuildOMPDistScheduleClause(OpenMPDistScheduleClauseKind Kind,
1951 Expr *ChunkSize, SourceLocation StartLoc,
1952 SourceLocation LParenLoc, SourceLocation KindLoc,
1953 SourceLocation CommaLoc, SourceLocation EndLoc) {
1954 return getSema().ActOnOpenMPDistScheduleClause(
1955 Kind, ChunkSize, StartLoc, LParenLoc, KindLoc, CommaLoc, EndLoc);
1956 }
1957
1958 /// Build a new OpenMP 'to' clause.
1959 ///
1960 /// By default, performs semantic analysis to build the new statement.
1961 /// Subclasses may override this routine to provide different behavior.
1962 OMPClause *RebuildOMPToClause(ArrayRef<Expr *> VarList,
1963 CXXScopeSpec &MapperIdScopeSpec,
1964 DeclarationNameInfo &MapperId,
1965 const OMPVarListLocTy &Locs,
1966 ArrayRef<Expr *> UnresolvedMappers) {
1967 return getSema().ActOnOpenMPToClause(VarList, MapperIdScopeSpec, MapperId,
1968 Locs, UnresolvedMappers);
1969 }
1970
1971 /// Build a new OpenMP 'from' clause.
1972 ///
1973 /// By default, performs semantic analysis to build the new statement.
1974 /// Subclasses may override this routine to provide different behavior.
1975 OMPClause *RebuildOMPFromClause(ArrayRef<Expr *> VarList,
1976 CXXScopeSpec &MapperIdScopeSpec,
1977 DeclarationNameInfo &MapperId,
1978 const OMPVarListLocTy &Locs,
1979 ArrayRef<Expr *> UnresolvedMappers) {
1980 return getSema().ActOnOpenMPFromClause(VarList, MapperIdScopeSpec, MapperId,
1981 Locs, UnresolvedMappers);
1982 }
1983
1984 /// Build a new OpenMP 'use_device_ptr' clause.
1985 ///
1986 /// By default, performs semantic analysis to build the new OpenMP clause.
1987 /// Subclasses may override this routine to provide different behavior.
1988 OMPClause *RebuildOMPUseDevicePtrClause(ArrayRef<Expr *> VarList,
1989 const OMPVarListLocTy &Locs) {
1990 return getSema().ActOnOpenMPUseDevicePtrClause(VarList, Locs);
1991 }
1992
1993 /// Build a new OpenMP 'is_device_ptr' clause.
1994 ///
1995 /// By default, performs semantic analysis to build the new OpenMP clause.
1996 /// Subclasses may override this routine to provide different behavior.
1997 OMPClause *RebuildOMPIsDevicePtrClause(ArrayRef<Expr *> VarList,
1998 const OMPVarListLocTy &Locs) {
1999 return getSema().ActOnOpenMPIsDevicePtrClause(VarList, Locs);
2000 }
2001
2002 /// Build a new OpenMP 'defaultmap' clause.
2003 ///
2004 /// By default, performs semantic analysis to build the new OpenMP clause.
2005 /// Subclasses may override this routine to provide different behavior.
2006 OMPClause *RebuildOMPDefaultmapClause(OpenMPDefaultmapClauseModifier M,
2007 OpenMPDefaultmapClauseKind Kind,
2008 SourceLocation StartLoc,
2009 SourceLocation LParenLoc,
2010 SourceLocation MLoc,
2011 SourceLocation KindLoc,
2012 SourceLocation EndLoc) {
2013 return getSema().ActOnOpenMPDefaultmapClause(M, Kind, StartLoc, LParenLoc,
2014 MLoc, KindLoc, EndLoc);
2015 }
2016
2017 /// Build a new OpenMP 'nontemporal' clause.
2018 ///
2019 /// By default, performs semantic analysis to build the new OpenMP clause.
2020 /// Subclasses may override this routine to provide different behavior.
2021 OMPClause *RebuildOMPNontemporalClause(ArrayRef<Expr *> VarList,
2022 SourceLocation StartLoc,
2023 SourceLocation LParenLoc,
2024 SourceLocation EndLoc) {
2025 return getSema().ActOnOpenMPNontemporalClause(VarList, StartLoc, LParenLoc,
2026 EndLoc);
2027 }
2028
2029 /// Build a new OpenMP 'order' clause.
2030 ///
2031 /// By default, performs semantic analysis to build the new OpenMP clause.
2032 /// Subclasses may override this routine to provide different behavior.
2033 OMPClause *RebuildOMPOrderClause(OpenMPOrderClauseKind Kind,
2034 SourceLocation KindKwLoc,
2035 SourceLocation StartLoc,
2036 SourceLocation LParenLoc,
2037 SourceLocation EndLoc) {
2038 return getSema().ActOnOpenMPOrderClause(Kind, KindKwLoc, StartLoc,
2039 LParenLoc, EndLoc);
2040 }
2041
2042 /// Rebuild the operand to an Objective-C \@synchronized statement.
2043 ///
2044 /// By default, performs semantic analysis to build the new statement.
2045 /// Subclasses may override this routine to provide different behavior.
2046 ExprResult RebuildObjCAtSynchronizedOperand(SourceLocation atLoc,
2047 Expr *object) {
2048 return getSema().ActOnObjCAtSynchronizedOperand(atLoc, object);
2049 }
2050
2051 /// Build a new Objective-C \@synchronized statement.
2052 ///
2053 /// By default, performs semantic analysis to build the new statement.
2054 /// Subclasses may override this routine to provide different behavior.
2055 StmtResult RebuildObjCAtSynchronizedStmt(SourceLocation AtLoc,
2056 Expr *Object, Stmt *Body) {
2057 return getSema().ActOnObjCAtSynchronizedStmt(AtLoc, Object, Body);
2058 }
2059
2060 /// Build a new Objective-C \@autoreleasepool statement.
2061 ///
2062 /// By default, performs semantic analysis to build the new statement.
2063 /// Subclasses may override this routine to provide different behavior.
2064 StmtResult RebuildObjCAutoreleasePoolStmt(SourceLocation AtLoc,
2065 Stmt *Body) {
2066 return getSema().ActOnObjCAutoreleasePoolStmt(AtLoc, Body);
2067 }
2068
2069 /// Build a new Objective-C fast enumeration statement.
2070 ///
2071 /// By default, performs semantic analysis to build the new statement.
2072 /// Subclasses may override this routine to provide different behavior.
2073 StmtResult RebuildObjCForCollectionStmt(SourceLocation ForLoc,
2074 Stmt *Element,
2075 Expr *Collection,
2076 SourceLocation RParenLoc,
2077 Stmt *Body) {
2078 StmtResult ForEachStmt = getSema().ActOnObjCForCollectionStmt(ForLoc,
2079 Element,
2080 Collection,
2081 RParenLoc);
2082 if (ForEachStmt.isInvalid())
2083 return StmtError();
2084
2085 return getSema().FinishObjCForCollectionStmt(ForEachStmt.get(), Body);
2086 }
2087
2088 /// Build a new C++ exception declaration.
2089 ///
2090 /// By default, performs semantic analysis to build the new decaration.
2091 /// Subclasses may override this routine to provide different behavior.
2092 VarDecl *RebuildExceptionDecl(VarDecl *ExceptionDecl,
2093 TypeSourceInfo *Declarator,
2094 SourceLocation StartLoc,
2095 SourceLocation IdLoc,
2096 IdentifierInfo *Id) {
2097 VarDecl *Var = getSema().BuildExceptionDeclaration(nullptr, Declarator,
2098 StartLoc, IdLoc, Id);
2099 if (Var)
2100 getSema().CurContext->addDecl(Var);
2101 return Var;
2102 }
2103
2104 /// Build a new C++ catch statement.
2105 ///
2106 /// By default, performs semantic analysis to build the new statement.
2107 /// Subclasses may override this routine to provide different behavior.
2108 StmtResult RebuildCXXCatchStmt(SourceLocation CatchLoc,
2109 VarDecl *ExceptionDecl,
2110 Stmt *Handler) {
2111 return Owned(new (getSema().Context) CXXCatchStmt(CatchLoc, ExceptionDecl,
2112 Handler));
2113 }
2114
2115 /// Build a new C++ try statement.
2116 ///
2117 /// By default, performs semantic analysis to build the new statement.
2118 /// Subclasses may override this routine to provide different behavior.
2119 StmtResult RebuildCXXTryStmt(SourceLocation TryLoc, Stmt *TryBlock,
2120 ArrayRef<Stmt *> Handlers) {
2121 return getSema().ActOnCXXTryBlock(TryLoc, TryBlock, Handlers);
2122 }
2123
2124 /// Build a new C++0x range-based for statement.
2125 ///
2126 /// By default, performs semantic analysis to build the new statement.
2127 /// Subclasses may override this routine to provide different behavior.
2128 StmtResult RebuildCXXForRangeStmt(SourceLocation ForLoc,
2129 SourceLocation CoawaitLoc, Stmt *Init,
2130 SourceLocation ColonLoc, Stmt *Range,
2131 Stmt *Begin, Stmt *End, Expr *Cond,
2132 Expr *Inc, Stmt *LoopVar,
2133 SourceLocation RParenLoc) {
2134 // If we've just learned that the range is actually an Objective-C
2135 // collection, treat this as an Objective-C fast enumeration loop.
2136 if (DeclStmt *RangeStmt = dyn_cast<DeclStmt>(Range)) {
2137 if (RangeStmt->isSingleDecl()) {
2138 if (VarDecl *RangeVar = dyn_cast<VarDecl>(RangeStmt->getSingleDecl())) {
2139 if (RangeVar->isInvalidDecl())
2140 return StmtError();
2141
2142 Expr *RangeExpr = RangeVar->getInit();
2143 if (!RangeExpr->isTypeDependent() &&
2144 RangeExpr->getType()->isObjCObjectPointerType()) {
2145 // FIXME: Support init-statements in Objective-C++20 ranged for
2146 // statement.
2147 if (Init) {
2148 return SemaRef.Diag(Init->getBeginLoc(),
2149 diag::err_objc_for_range_init_stmt)
2150 << Init->getSourceRange();
2151 }
2152 return getSema().ActOnObjCForCollectionStmt(ForLoc, LoopVar,
2153 RangeExpr, RParenLoc);
2154 }
2155 }
2156 }
2157 }
2158
2159 return getSema().BuildCXXForRangeStmt(ForLoc, CoawaitLoc, Init, ColonLoc,
2160 Range, Begin, End, Cond, Inc, LoopVar,
2161 RParenLoc, Sema::BFRK_Rebuild);
2162 }
2163
2164 /// Build a new C++0x range-based for statement.
2165 ///
2166 /// By default, performs semantic analysis to build the new statement.
2167 /// Subclasses may override this routine to provide different behavior.
2168 StmtResult RebuildMSDependentExistsStmt(SourceLocation KeywordLoc,
2169 bool IsIfExists,
2170 NestedNameSpecifierLoc QualifierLoc,
2171 DeclarationNameInfo NameInfo,
2172 Stmt *Nested) {
2173 return getSema().BuildMSDependentExistsStmt(KeywordLoc, IsIfExists,
2174 QualifierLoc, NameInfo, Nested);
2175 }
2176
2177 /// Attach body to a C++0x range-based for statement.
2178 ///
2179 /// By default, performs semantic analysis to finish the new statement.
2180 /// Subclasses may override this routine to provide different behavior.
2181 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body) {
2182 return getSema().FinishCXXForRangeStmt(ForRange, Body);
2183 }
2184
2185 StmtResult RebuildSEHTryStmt(bool IsCXXTry, SourceLocation TryLoc,
2186 Stmt *TryBlock, Stmt *Handler) {
2187 return getSema().ActOnSEHTryBlock(IsCXXTry, TryLoc, TryBlock, Handler);
2188 }
2189
2190 StmtResult RebuildSEHExceptStmt(SourceLocation Loc, Expr *FilterExpr,
2191 Stmt *Block) {
2192 return getSema().ActOnSEHExceptBlock(Loc, FilterExpr, Block);
2193 }
2194
2195 StmtResult RebuildSEHFinallyStmt(SourceLocation Loc, Stmt *Block) {
2196 return SEHFinallyStmt::Create(getSema().getASTContext(), Loc, Block);
2197 }
2198
2199 /// Build a new predefined expression.
2200 ///
2201 /// By default, performs semantic analysis to build the new expression.
2202 /// Subclasses may override this routine to provide different behavior.
2203 ExprResult RebuildPredefinedExpr(SourceLocation Loc,
2204 PredefinedExpr::IdentKind IK) {
2205 return getSema().BuildPredefinedExpr(Loc, IK);
2206 }
2207
2208 /// Build a new expression that references a declaration.
2209 ///
2210 /// By default, performs semantic analysis to build the new expression.
2211 /// Subclasses may override this routine to provide different behavior.
2212 ExprResult RebuildDeclarationNameExpr(const CXXScopeSpec &SS,
2213 LookupResult &R,
2214 bool RequiresADL) {
2215 return getSema().BuildDeclarationNameExpr(SS, R, RequiresADL);
2216 }
2217
2218
2219 /// Build a new expression that references a declaration.
2220 ///
2221 /// By default, performs semantic analysis to build the new expression.
2222 /// Subclasses may override this routine to provide different behavior.
2223 ExprResult RebuildDeclRefExpr(NestedNameSpecifierLoc QualifierLoc,
2224 ValueDecl *VD,
2225 const DeclarationNameInfo &NameInfo,
2226 NamedDecl *Found,
2227 TemplateArgumentListInfo *TemplateArgs) {
2228 CXXScopeSpec SS;
2229 SS.Adopt(QualifierLoc);
2230 return getSema().BuildDeclarationNameExpr(SS, NameInfo, VD, Found,
2231 TemplateArgs);
2232 }
2233
2234 /// Build a new expression in parentheses.
2235 ///
2236 /// By default, performs semantic analysis to build the new expression.
2237 /// Subclasses may override this routine to provide different behavior.
2238 ExprResult RebuildParenExpr(Expr *SubExpr, SourceLocation LParen,
2239 SourceLocation RParen) {
2240 return getSema().ActOnParenExpr(LParen, RParen, SubExpr);
2241 }
2242
2243 /// Build a new pseudo-destructor expression.
2244 ///
2245 /// By default, performs semantic analysis to build the new expression.
2246 /// Subclasses may override this routine to provide different behavior.
2247 ExprResult RebuildCXXPseudoDestructorExpr(Expr *Base,
2248 SourceLocation OperatorLoc,
2249 bool isArrow,
2250 CXXScopeSpec &SS,
2251 TypeSourceInfo *ScopeType,
2252 SourceLocation CCLoc,
2253 SourceLocation TildeLoc,
2254 PseudoDestructorTypeStorage Destroyed);
2255
2256 /// Build a new unary operator expression.
2257 ///
2258 /// By default, performs semantic analysis to build the new expression.
2259 /// Subclasses may override this routine to provide different behavior.
2260 ExprResult RebuildUnaryOperator(SourceLocation OpLoc,
2261 UnaryOperatorKind Opc,
2262 Expr *SubExpr) {
2263 return getSema().BuildUnaryOp(/*Scope=*/nullptr, OpLoc, Opc, SubExpr);
2264 }
2265
2266 /// Build a new builtin offsetof expression.
2267 ///
2268 /// By default, performs semantic analysis to build the new expression.
2269 /// Subclasses may override this routine to provide different behavior.
2270 ExprResult RebuildOffsetOfExpr(SourceLocation OperatorLoc,
2271 TypeSourceInfo *Type,
2272 ArrayRef<Sema::OffsetOfComponent> Components,
2273 SourceLocation RParenLoc) {
2274 return getSema().BuildBuiltinOffsetOf(OperatorLoc, Type, Components,
2275 RParenLoc);
2276 }
2277
2278 /// Build a new sizeof, alignof or vec_step expression with a
2279 /// type argument.
2280 ///
2281 /// By default, performs semantic analysis to build the new expression.
2282 /// Subclasses may override this routine to provide different behavior.
2283 ExprResult RebuildUnaryExprOrTypeTrait(TypeSourceInfo *TInfo,
2284 SourceLocation OpLoc,
2285 UnaryExprOrTypeTrait ExprKind,
2286 SourceRange R) {
2287 return getSema().CreateUnaryExprOrTypeTraitExpr(TInfo, OpLoc, ExprKind, R);
2288 }
2289
2290 /// Build a new sizeof, alignof or vec step expression with an
2291 /// expression argument.
2292 ///
2293 /// By default, performs semantic analysis to build the new expression.
2294 /// Subclasses may override this routine to provide different behavior.
2295 ExprResult RebuildUnaryExprOrTypeTrait(Expr *SubExpr, SourceLocation OpLoc,
2296 UnaryExprOrTypeTrait ExprKind,
2297 SourceRange R) {
2298 ExprResult Result
2299 = getSema().CreateUnaryExprOrTypeTraitExpr(SubExpr, OpLoc, ExprKind);
2300 if (Result.isInvalid())
2301 return ExprError();
2302
2303 return Result;
2304 }
2305
2306 /// Build a new array subscript expression.
2307 ///
2308 /// By default, performs semantic analysis to build the new expression.