Bug Summary

File:clang/lib/Sema/TreeTransform.h
Warning:line 5724, column 24
Forming reference to null pointer

Annotated Source Code

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clang -cc1 -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 -mframe-pointer=none -relaxed-aliasing -fmath-errno -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/llvm-toolchain-snapshot-14~++20210903100615+fd66b44ec19e/build-llvm/tools/clang/lib/Sema -resource-dir /usr/lib/llvm-14/lib/clang/14.0.0 -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-14~++20210903100615+fd66b44ec19e/build-llvm/tools/clang/lib/Sema -I /build/llvm-toolchain-snapshot-14~++20210903100615+fd66b44ec19e/clang/lib/Sema -I /build/llvm-toolchain-snapshot-14~++20210903100615+fd66b44ec19e/clang/include -I /build/llvm-toolchain-snapshot-14~++20210903100615+fd66b44ec19e/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-14~++20210903100615+fd66b44ec19e/build-llvm/include -I /build/llvm-toolchain-snapshot-14~++20210903100615+fd66b44ec19e/llvm/include -D NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward -internal-isystem /usr/lib/llvm-14/lib/clang/14.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../x86_64-linux-gnu/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-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir=/build/llvm-toolchain-snapshot-14~++20210903100615+fd66b44ec19e/build-llvm/tools/clang/lib/Sema -fdebug-prefix-map=/build/llvm-toolchain-snapshot-14~++20210903100615+fd66b44ec19e=. -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2021-09-04-040900-46481-1 -x c++ /build/llvm-toolchain-snapshot-14~++20210903100615+fd66b44ec19e/clang/lib/Sema/SemaTemplateInstantiate.cpp

/build/llvm-toolchain-snapshot-14~++20210903100615+fd66b44ec19e/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 "TreeTransform.h"
13#include "clang/AST/ASTConsumer.h"
14#include "clang/AST/ASTContext.h"
15#include "clang/AST/ASTLambda.h"
16#include "clang/AST/ASTMutationListener.h"
17#include "clang/AST/DeclTemplate.h"
18#include "clang/AST/Expr.h"
19#include "clang/AST/PrettyDeclStackTrace.h"
20#include "clang/AST/TypeVisitor.h"
21#include "clang/Basic/LangOptions.h"
22#include "clang/Basic/Stack.h"
23#include "clang/Basic/TargetInfo.h"
24#include "clang/Sema/DeclSpec.h"
25#include "clang/Sema/Initialization.h"
26#include "clang/Sema/Lookup.h"
27#include "clang/Sema/SemaConcept.h"
28#include "clang/Sema/SemaInternal.h"
29#include "clang/Sema/Template.h"
30#include "clang/Sema/TemplateDeduction.h"
31#include "clang/Sema/TemplateInstCallback.h"
32#include "llvm/Support/TimeProfiler.h"
33
34using namespace clang;
35using namespace sema;
36
37//===----------------------------------------------------------------------===/
38// Template Instantiation Support
39//===----------------------------------------------------------------------===/
40
41/// Retrieve the template argument list(s) that should be used to
42/// instantiate the definition of the given declaration.
43///
44/// \param D the declaration for which we are computing template instantiation
45/// arguments.
46///
47/// \param Innermost if non-NULL, the innermost template argument list.
48///
49/// \param RelativeToPrimary true if we should get the template
50/// arguments relative to the primary template, even when we're
51/// dealing with a specialization. This is only relevant for function
52/// template specializations.
53///
54/// \param Pattern If non-NULL, indicates the pattern from which we will be
55/// instantiating the definition of the given declaration, \p D. This is
56/// used to determine the proper set of template instantiation arguments for
57/// friend function template specializations.
58MultiLevelTemplateArgumentList
59Sema::getTemplateInstantiationArgs(NamedDecl *D,
60 const TemplateArgumentList *Innermost,
61 bool RelativeToPrimary,
62 const FunctionDecl *Pattern) {
63 // Accumulate the set of template argument lists in this structure.
64 MultiLevelTemplateArgumentList Result;
65
66 if (Innermost)
67 Result.addOuterTemplateArguments(Innermost);
68
69 DeclContext *Ctx = dyn_cast<DeclContext>(D);
70 if (!Ctx) {
71 Ctx = D->getDeclContext();
72
73 // Add template arguments from a variable template instantiation. For a
74 // class-scope explicit specialization, there are no template arguments
75 // at this level, but there may be enclosing template arguments.
76 VarTemplateSpecializationDecl *Spec =
77 dyn_cast<VarTemplateSpecializationDecl>(D);
78 if (Spec && !Spec->isClassScopeExplicitSpecialization()) {
79 // We're done when we hit an explicit specialization.
80 if (Spec->getSpecializationKind() == TSK_ExplicitSpecialization &&
81 !isa<VarTemplatePartialSpecializationDecl>(Spec))
82 return Result;
83
84 Result.addOuterTemplateArguments(&Spec->getTemplateInstantiationArgs());
85
86 // If this variable template specialization was instantiated from a
87 // specialized member that is a variable template, we're done.
88 assert(Spec->getSpecializedTemplate() && "No variable template?")(static_cast<void> (0));
89 llvm::PointerUnion<VarTemplateDecl*,
90 VarTemplatePartialSpecializationDecl*> Specialized
91 = Spec->getSpecializedTemplateOrPartial();
92 if (VarTemplatePartialSpecializationDecl *Partial =
93 Specialized.dyn_cast<VarTemplatePartialSpecializationDecl *>()) {
94 if (Partial->isMemberSpecialization())
95 return Result;
96 } else {
97 VarTemplateDecl *Tmpl = Specialized.get<VarTemplateDecl *>();
98 if (Tmpl->isMemberSpecialization())
99 return Result;
100 }
101 }
102
103 // If we have a template template parameter with translation unit context,
104 // then we're performing substitution into a default template argument of
105 // this template template parameter before we've constructed the template
106 // that will own this template template parameter. In this case, we
107 // use empty template parameter lists for all of the outer templates
108 // to avoid performing any substitutions.
109 if (Ctx->isTranslationUnit()) {
110 if (TemplateTemplateParmDecl *TTP
111 = dyn_cast<TemplateTemplateParmDecl>(D)) {
112 for (unsigned I = 0, N = TTP->getDepth() + 1; I != N; ++I)
113 Result.addOuterTemplateArguments(None);
114 return Result;
115 }
116 }
117 }
118
119 while (!Ctx->isFileContext()) {
120 // Add template arguments from a class template instantiation.
121 ClassTemplateSpecializationDecl *Spec
122 = dyn_cast<ClassTemplateSpecializationDecl>(Ctx);
123 if (Spec && !Spec->isClassScopeExplicitSpecialization()) {
124 // We're done when we hit an explicit specialization.
125 if (Spec->getSpecializationKind() == TSK_ExplicitSpecialization &&
126 !isa<ClassTemplatePartialSpecializationDecl>(Spec))
127 break;
128
129 Result.addOuterTemplateArguments(&Spec->getTemplateInstantiationArgs());
130
131 // If this class template specialization was instantiated from a
132 // specialized member that is a class template, we're done.
133 assert(Spec->getSpecializedTemplate() && "No class template?")(static_cast<void> (0));
134 if (Spec->getSpecializedTemplate()->isMemberSpecialization())
135 break;
136 }
137 // Add template arguments from a function template specialization.
138 else if (FunctionDecl *Function = dyn_cast<FunctionDecl>(Ctx)) {
139 if (!RelativeToPrimary &&
140 Function->getTemplateSpecializationKindForInstantiation() ==
141 TSK_ExplicitSpecialization)
142 break;
143
144 if (!RelativeToPrimary && Function->getTemplateSpecializationKind() ==
145 TSK_ExplicitSpecialization) {
146 // This is an implicit instantiation of an explicit specialization. We
147 // don't get any template arguments from this function but might get
148 // some from an enclosing template.
149 } else if (const TemplateArgumentList *TemplateArgs
150 = Function->getTemplateSpecializationArgs()) {
151 // Add the template arguments for this specialization.
152 Result.addOuterTemplateArguments(TemplateArgs);
153
154 // If this function was instantiated from a specialized member that is
155 // a function template, we're done.
156 assert(Function->getPrimaryTemplate() && "No function template?")(static_cast<void> (0));
157 if (Function->getPrimaryTemplate()->isMemberSpecialization())
158 break;
159
160 // If this function is a generic lambda specialization, we are done.
161 if (isGenericLambdaCallOperatorOrStaticInvokerSpecialization(Function))
162 break;
163
164 } else if (FunctionTemplateDecl *FunTmpl
165 = Function->getDescribedFunctionTemplate()) {
166 // Add the "injected" template arguments.
167 Result.addOuterTemplateArguments(FunTmpl->getInjectedTemplateArgs());
168 }
169
170 // If this is a friend declaration and it declares an entity at
171 // namespace scope, take arguments from its lexical parent
172 // instead of its semantic parent, unless of course the pattern we're
173 // instantiating actually comes from the file's context!
174 if (Function->getFriendObjectKind() &&
175 Function->getDeclContext()->isFileContext() &&
176 (!Pattern || !Pattern->getLexicalDeclContext()->isFileContext())) {
177 Ctx = Function->getLexicalDeclContext();
178 RelativeToPrimary = false;
179 continue;
180 }
181 } else if (CXXRecordDecl *Rec = dyn_cast<CXXRecordDecl>(Ctx)) {
182 if (ClassTemplateDecl *ClassTemplate = Rec->getDescribedClassTemplate()) {
183 QualType T = ClassTemplate->getInjectedClassNameSpecialization();
184 const TemplateSpecializationType *TST =
185 cast<TemplateSpecializationType>(Context.getCanonicalType(T));
186 Result.addOuterTemplateArguments(
187 llvm::makeArrayRef(TST->getArgs(), TST->getNumArgs()));
188 if (ClassTemplate->isMemberSpecialization())
189 break;
190 }
191 }
192
193 Ctx = Ctx->getParent();
194 RelativeToPrimary = false;
195 }
196
197 return Result;
198}
199
200bool Sema::CodeSynthesisContext::isInstantiationRecord() const {
201 switch (Kind) {
202 case TemplateInstantiation:
203 case ExceptionSpecInstantiation:
204 case DefaultTemplateArgumentInstantiation:
205 case DefaultFunctionArgumentInstantiation:
206 case ExplicitTemplateArgumentSubstitution:
207 case DeducedTemplateArgumentSubstitution:
208 case PriorTemplateArgumentSubstitution:
209 case ConstraintsCheck:
210 case NestedRequirementConstraintsCheck:
211 return true;
212
213 case RequirementInstantiation:
214 case DefaultTemplateArgumentChecking:
215 case DeclaringSpecialMember:
216 case DeclaringImplicitEqualityComparison:
217 case DefiningSynthesizedFunction:
218 case ExceptionSpecEvaluation:
219 case ConstraintSubstitution:
220 case ParameterMappingSubstitution:
221 case ConstraintNormalization:
222 case RewritingOperatorAsSpaceship:
223 case InitializingStructuredBinding:
224 case MarkingClassDllexported:
225 return false;
226
227 // This function should never be called when Kind's value is Memoization.
228 case Memoization:
229 break;
230 }
231
232 llvm_unreachable("Invalid SynthesisKind!")__builtin_unreachable();
233}
234
235Sema::InstantiatingTemplate::InstantiatingTemplate(
236 Sema &SemaRef, CodeSynthesisContext::SynthesisKind Kind,
237 SourceLocation PointOfInstantiation, SourceRange InstantiationRange,
238 Decl *Entity, NamedDecl *Template, ArrayRef<TemplateArgument> TemplateArgs,
239 sema::TemplateDeductionInfo *DeductionInfo)
240 : SemaRef(SemaRef) {
241 // Don't allow further instantiation if a fatal error and an uncompilable
242 // error have occurred. Any diagnostics we might have raised will not be
243 // visible, and we do not need to construct a correct AST.
244 if (SemaRef.Diags.hasFatalErrorOccurred() &&
245 SemaRef.hasUncompilableErrorOccurred()) {
246 Invalid = true;
247 return;
248 }
249 Invalid = CheckInstantiationDepth(PointOfInstantiation, InstantiationRange);
250 if (!Invalid) {
251 CodeSynthesisContext Inst;
252 Inst.Kind = Kind;
253 Inst.PointOfInstantiation = PointOfInstantiation;
254 Inst.Entity = Entity;
255 Inst.Template = Template;
256 Inst.TemplateArgs = TemplateArgs.data();
257 Inst.NumTemplateArgs = TemplateArgs.size();
258 Inst.DeductionInfo = DeductionInfo;
259 Inst.InstantiationRange = InstantiationRange;
260 SemaRef.pushCodeSynthesisContext(Inst);
261
262 AlreadyInstantiating = !Inst.Entity ? false :
263 !SemaRef.InstantiatingSpecializations
264 .insert({Inst.Entity->getCanonicalDecl(), Inst.Kind})
265 .second;
266 atTemplateBegin(SemaRef.TemplateInstCallbacks, SemaRef, Inst);
267 }
268}
269
270Sema::InstantiatingTemplate::InstantiatingTemplate(
271 Sema &SemaRef, SourceLocation PointOfInstantiation, Decl *Entity,
272 SourceRange InstantiationRange)
273 : InstantiatingTemplate(SemaRef,
274 CodeSynthesisContext::TemplateInstantiation,
275 PointOfInstantiation, InstantiationRange, Entity) {}
276
277Sema::InstantiatingTemplate::InstantiatingTemplate(
278 Sema &SemaRef, SourceLocation PointOfInstantiation, FunctionDecl *Entity,
279 ExceptionSpecification, SourceRange InstantiationRange)
280 : InstantiatingTemplate(
281 SemaRef, CodeSynthesisContext::ExceptionSpecInstantiation,
282 PointOfInstantiation, InstantiationRange, Entity) {}
283
284Sema::InstantiatingTemplate::InstantiatingTemplate(
285 Sema &SemaRef, SourceLocation PointOfInstantiation, TemplateParameter Param,
286 TemplateDecl *Template, ArrayRef<TemplateArgument> TemplateArgs,
287 SourceRange InstantiationRange)
288 : InstantiatingTemplate(
289 SemaRef,
290 CodeSynthesisContext::DefaultTemplateArgumentInstantiation,
291 PointOfInstantiation, InstantiationRange, getAsNamedDecl(Param),
292 Template, TemplateArgs) {}
293
294Sema::InstantiatingTemplate::InstantiatingTemplate(
295 Sema &SemaRef, SourceLocation PointOfInstantiation,
296 FunctionTemplateDecl *FunctionTemplate,
297 ArrayRef<TemplateArgument> TemplateArgs,
298 CodeSynthesisContext::SynthesisKind Kind,
299 sema::TemplateDeductionInfo &DeductionInfo, SourceRange InstantiationRange)
300 : InstantiatingTemplate(SemaRef, Kind, PointOfInstantiation,
301 InstantiationRange, FunctionTemplate, nullptr,
302 TemplateArgs, &DeductionInfo) {
303 assert((static_cast<void> (0))
304 Kind == CodeSynthesisContext::ExplicitTemplateArgumentSubstitution ||(static_cast<void> (0))
305 Kind == CodeSynthesisContext::DeducedTemplateArgumentSubstitution)(static_cast<void> (0));
306}
307
308Sema::InstantiatingTemplate::InstantiatingTemplate(
309 Sema &SemaRef, SourceLocation PointOfInstantiation,
310 TemplateDecl *Template,
311 ArrayRef<TemplateArgument> TemplateArgs,
312 sema::TemplateDeductionInfo &DeductionInfo, SourceRange InstantiationRange)
313 : InstantiatingTemplate(
314 SemaRef,
315 CodeSynthesisContext::DeducedTemplateArgumentSubstitution,
316 PointOfInstantiation, InstantiationRange, Template, nullptr,
317 TemplateArgs, &DeductionInfo) {}
318
319Sema::InstantiatingTemplate::InstantiatingTemplate(
320 Sema &SemaRef, SourceLocation PointOfInstantiation,
321 ClassTemplatePartialSpecializationDecl *PartialSpec,
322 ArrayRef<TemplateArgument> TemplateArgs,
323 sema::TemplateDeductionInfo &DeductionInfo, SourceRange InstantiationRange)
324 : InstantiatingTemplate(
325 SemaRef,
326 CodeSynthesisContext::DeducedTemplateArgumentSubstitution,
327 PointOfInstantiation, InstantiationRange, PartialSpec, nullptr,
328 TemplateArgs, &DeductionInfo) {}
329
330Sema::InstantiatingTemplate::InstantiatingTemplate(
331 Sema &SemaRef, SourceLocation PointOfInstantiation,
332 VarTemplatePartialSpecializationDecl *PartialSpec,
333 ArrayRef<TemplateArgument> TemplateArgs,
334 sema::TemplateDeductionInfo &DeductionInfo, SourceRange InstantiationRange)
335 : InstantiatingTemplate(
336 SemaRef,
337 CodeSynthesisContext::DeducedTemplateArgumentSubstitution,
338 PointOfInstantiation, InstantiationRange, PartialSpec, nullptr,
339 TemplateArgs, &DeductionInfo) {}
340
341Sema::InstantiatingTemplate::InstantiatingTemplate(
342 Sema &SemaRef, SourceLocation PointOfInstantiation, ParmVarDecl *Param,
343 ArrayRef<TemplateArgument> TemplateArgs, SourceRange InstantiationRange)
344 : InstantiatingTemplate(
345 SemaRef,
346 CodeSynthesisContext::DefaultFunctionArgumentInstantiation,
347 PointOfInstantiation, InstantiationRange, Param, nullptr,
348 TemplateArgs) {}
349
350Sema::InstantiatingTemplate::InstantiatingTemplate(
351 Sema &SemaRef, SourceLocation PointOfInstantiation, NamedDecl *Template,
352 NonTypeTemplateParmDecl *Param, ArrayRef<TemplateArgument> TemplateArgs,
353 SourceRange InstantiationRange)
354 : InstantiatingTemplate(
355 SemaRef,
356 CodeSynthesisContext::PriorTemplateArgumentSubstitution,
357 PointOfInstantiation, InstantiationRange, Param, Template,
358 TemplateArgs) {}
359
360Sema::InstantiatingTemplate::InstantiatingTemplate(
361 Sema &SemaRef, SourceLocation PointOfInstantiation, NamedDecl *Template,
362 TemplateTemplateParmDecl *Param, ArrayRef<TemplateArgument> TemplateArgs,
363 SourceRange InstantiationRange)
364 : InstantiatingTemplate(
365 SemaRef,
366 CodeSynthesisContext::PriorTemplateArgumentSubstitution,
367 PointOfInstantiation, InstantiationRange, Param, Template,
368 TemplateArgs) {}
369
370Sema::InstantiatingTemplate::InstantiatingTemplate(
371 Sema &SemaRef, SourceLocation PointOfInstantiation, TemplateDecl *Template,
372 NamedDecl *Param, ArrayRef<TemplateArgument> TemplateArgs,
373 SourceRange InstantiationRange)
374 : InstantiatingTemplate(
375 SemaRef, CodeSynthesisContext::DefaultTemplateArgumentChecking,
376 PointOfInstantiation, InstantiationRange, Param, Template,
377 TemplateArgs) {}
378
379Sema::InstantiatingTemplate::InstantiatingTemplate(
380 Sema &SemaRef, SourceLocation PointOfInstantiation,
381 concepts::Requirement *Req, sema::TemplateDeductionInfo &DeductionInfo,
382 SourceRange InstantiationRange)
383 : InstantiatingTemplate(
384 SemaRef, CodeSynthesisContext::RequirementInstantiation,
385 PointOfInstantiation, InstantiationRange, /*Entity=*/nullptr,
386 /*Template=*/nullptr, /*TemplateArgs=*/None, &DeductionInfo) {}
387
388
389Sema::InstantiatingTemplate::InstantiatingTemplate(
390 Sema &SemaRef, SourceLocation PointOfInstantiation,
391 concepts::NestedRequirement *Req, ConstraintsCheck,
392 SourceRange InstantiationRange)
393 : InstantiatingTemplate(
394 SemaRef, CodeSynthesisContext::NestedRequirementConstraintsCheck,
395 PointOfInstantiation, InstantiationRange, /*Entity=*/nullptr,
396 /*Template=*/nullptr, /*TemplateArgs=*/None) {}
397
398
399Sema::InstantiatingTemplate::InstantiatingTemplate(
400 Sema &SemaRef, SourceLocation PointOfInstantiation,
401 ConstraintsCheck, NamedDecl *Template,
402 ArrayRef<TemplateArgument> TemplateArgs, SourceRange InstantiationRange)
403 : InstantiatingTemplate(
404 SemaRef, CodeSynthesisContext::ConstraintsCheck,
405 PointOfInstantiation, InstantiationRange, Template, nullptr,
406 TemplateArgs) {}
407
408Sema::InstantiatingTemplate::InstantiatingTemplate(
409 Sema &SemaRef, SourceLocation PointOfInstantiation,
410 ConstraintSubstitution, NamedDecl *Template,
411 sema::TemplateDeductionInfo &DeductionInfo, SourceRange InstantiationRange)
412 : InstantiatingTemplate(
413 SemaRef, CodeSynthesisContext::ConstraintSubstitution,
414 PointOfInstantiation, InstantiationRange, Template, nullptr,
415 {}, &DeductionInfo) {}
416
417Sema::InstantiatingTemplate::InstantiatingTemplate(
418 Sema &SemaRef, SourceLocation PointOfInstantiation,
419 ConstraintNormalization, NamedDecl *Template,
420 SourceRange InstantiationRange)
421 : InstantiatingTemplate(
422 SemaRef, CodeSynthesisContext::ConstraintNormalization,
423 PointOfInstantiation, InstantiationRange, Template) {}
424
425Sema::InstantiatingTemplate::InstantiatingTemplate(
426 Sema &SemaRef, SourceLocation PointOfInstantiation,
427 ParameterMappingSubstitution, NamedDecl *Template,
428 SourceRange InstantiationRange)
429 : InstantiatingTemplate(
430 SemaRef, CodeSynthesisContext::ParameterMappingSubstitution,
431 PointOfInstantiation, InstantiationRange, Template) {}
432
433void Sema::pushCodeSynthesisContext(CodeSynthesisContext Ctx) {
434 Ctx.SavedInNonInstantiationSFINAEContext = InNonInstantiationSFINAEContext;
435 InNonInstantiationSFINAEContext = false;
436
437 CodeSynthesisContexts.push_back(Ctx);
438
439 if (!Ctx.isInstantiationRecord())
440 ++NonInstantiationEntries;
441
442 // Check to see if we're low on stack space. We can't do anything about this
443 // from here, but we can at least warn the user.
444 if (isStackNearlyExhausted())
445 warnStackExhausted(Ctx.PointOfInstantiation);
446}
447
448void Sema::popCodeSynthesisContext() {
449 auto &Active = CodeSynthesisContexts.back();
450 if (!Active.isInstantiationRecord()) {
451 assert(NonInstantiationEntries > 0)(static_cast<void> (0));
452 --NonInstantiationEntries;
453 }
454
455 InNonInstantiationSFINAEContext = Active.SavedInNonInstantiationSFINAEContext;
456
457 // Name lookup no longer looks in this template's defining module.
458 assert(CodeSynthesisContexts.size() >=(static_cast<void> (0))
459 CodeSynthesisContextLookupModules.size() &&(static_cast<void> (0))
460 "forgot to remove a lookup module for a template instantiation")(static_cast<void> (0));
461 if (CodeSynthesisContexts.size() ==
462 CodeSynthesisContextLookupModules.size()) {
463 if (Module *M = CodeSynthesisContextLookupModules.back())
464 LookupModulesCache.erase(M);
465 CodeSynthesisContextLookupModules.pop_back();
466 }
467
468 // If we've left the code synthesis context for the current context stack,
469 // stop remembering that we've emitted that stack.
470 if (CodeSynthesisContexts.size() ==
471 LastEmittedCodeSynthesisContextDepth)
472 LastEmittedCodeSynthesisContextDepth = 0;
473
474 CodeSynthesisContexts.pop_back();
475}
476
477void Sema::InstantiatingTemplate::Clear() {
478 if (!Invalid) {
479 if (!AlreadyInstantiating) {
480 auto &Active = SemaRef.CodeSynthesisContexts.back();
481 if (Active.Entity)
482 SemaRef.InstantiatingSpecializations.erase(
483 {Active.Entity->getCanonicalDecl(), Active.Kind});
484 }
485
486 atTemplateEnd(SemaRef.TemplateInstCallbacks, SemaRef,
487 SemaRef.CodeSynthesisContexts.back());
488
489 SemaRef.popCodeSynthesisContext();
490 Invalid = true;
491 }
492}
493
494bool Sema::InstantiatingTemplate::CheckInstantiationDepth(
495 SourceLocation PointOfInstantiation,
496 SourceRange InstantiationRange) {
497 assert(SemaRef.NonInstantiationEntries <=(static_cast<void> (0))
498 SemaRef.CodeSynthesisContexts.size())(static_cast<void> (0));
499 if ((SemaRef.CodeSynthesisContexts.size() -
500 SemaRef.NonInstantiationEntries)
501 <= SemaRef.getLangOpts().InstantiationDepth)
502 return false;
503
504 SemaRef.Diag(PointOfInstantiation,
505 diag::err_template_recursion_depth_exceeded)
506 << SemaRef.getLangOpts().InstantiationDepth
507 << InstantiationRange;
508 SemaRef.Diag(PointOfInstantiation, diag::note_template_recursion_depth)
509 << SemaRef.getLangOpts().InstantiationDepth;
510 return true;
511}
512
513/// Prints the current instantiation stack through a series of
514/// notes.
515void Sema::PrintInstantiationStack() {
516 // Determine which template instantiations to skip, if any.
517 unsigned SkipStart = CodeSynthesisContexts.size(), SkipEnd = SkipStart;
518 unsigned Limit = Diags.getTemplateBacktraceLimit();
519 if (Limit && Limit < CodeSynthesisContexts.size()) {
520 SkipStart = Limit / 2 + Limit % 2;
521 SkipEnd = CodeSynthesisContexts.size() - Limit / 2;
522 }
523
524 // FIXME: In all of these cases, we need to show the template arguments
525 unsigned InstantiationIdx = 0;
526 for (SmallVectorImpl<CodeSynthesisContext>::reverse_iterator
527 Active = CodeSynthesisContexts.rbegin(),
528 ActiveEnd = CodeSynthesisContexts.rend();
529 Active != ActiveEnd;
530 ++Active, ++InstantiationIdx) {
531 // Skip this instantiation?
532 if (InstantiationIdx >= SkipStart && InstantiationIdx < SkipEnd) {
533 if (InstantiationIdx == SkipStart) {
534 // Note that we're skipping instantiations.
535 Diags.Report(Active->PointOfInstantiation,
536 diag::note_instantiation_contexts_suppressed)
537 << unsigned(CodeSynthesisContexts.size() - Limit);
538 }
539 continue;
540 }
541
542 switch (Active->Kind) {
543 case CodeSynthesisContext::TemplateInstantiation: {
544 Decl *D = Active->Entity;
545 if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(D)) {
546 unsigned DiagID = diag::note_template_member_class_here;
547 if (isa<ClassTemplateSpecializationDecl>(Record))
548 DiagID = diag::note_template_class_instantiation_here;
549 Diags.Report(Active->PointOfInstantiation, DiagID)
550 << Record << Active->InstantiationRange;
551 } else if (FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) {
552 unsigned DiagID;
553 if (Function->getPrimaryTemplate())
554 DiagID = diag::note_function_template_spec_here;
555 else
556 DiagID = diag::note_template_member_function_here;
557 Diags.Report(Active->PointOfInstantiation, DiagID)
558 << Function
559 << Active->InstantiationRange;
560 } else if (VarDecl *VD = dyn_cast<VarDecl>(D)) {
561 Diags.Report(Active->PointOfInstantiation,
562 VD->isStaticDataMember()?
563 diag::note_template_static_data_member_def_here
564 : diag::note_template_variable_def_here)
565 << VD
566 << Active->InstantiationRange;
567 } else if (EnumDecl *ED = dyn_cast<EnumDecl>(D)) {
568 Diags.Report(Active->PointOfInstantiation,
569 diag::note_template_enum_def_here)
570 << ED
571 << Active->InstantiationRange;
572 } else if (FieldDecl *FD = dyn_cast<FieldDecl>(D)) {
573 Diags.Report(Active->PointOfInstantiation,
574 diag::note_template_nsdmi_here)
575 << FD << Active->InstantiationRange;
576 } else {
577 Diags.Report(Active->PointOfInstantiation,
578 diag::note_template_type_alias_instantiation_here)
579 << cast<TypeAliasTemplateDecl>(D)
580 << Active->InstantiationRange;
581 }
582 break;
583 }
584
585 case CodeSynthesisContext::DefaultTemplateArgumentInstantiation: {
586 TemplateDecl *Template = cast<TemplateDecl>(Active->Template);
587 SmallString<128> TemplateArgsStr;
588 llvm::raw_svector_ostream OS(TemplateArgsStr);
589 Template->printName(OS);
590 printTemplateArgumentList(OS, Active->template_arguments(),
591 getPrintingPolicy());
592 Diags.Report(Active->PointOfInstantiation,
593 diag::note_default_arg_instantiation_here)
594 << OS.str()
595 << Active->InstantiationRange;
596 break;
597 }
598
599 case CodeSynthesisContext::ExplicitTemplateArgumentSubstitution: {
600 FunctionTemplateDecl *FnTmpl = cast<FunctionTemplateDecl>(Active->Entity);
601 Diags.Report(Active->PointOfInstantiation,
602 diag::note_explicit_template_arg_substitution_here)
603 << FnTmpl
604 << getTemplateArgumentBindingsText(FnTmpl->getTemplateParameters(),
605 Active->TemplateArgs,
606 Active->NumTemplateArgs)
607 << Active->InstantiationRange;
608 break;
609 }
610
611 case CodeSynthesisContext::DeducedTemplateArgumentSubstitution: {
612 if (FunctionTemplateDecl *FnTmpl =
613 dyn_cast<FunctionTemplateDecl>(Active->Entity)) {
614 Diags.Report(Active->PointOfInstantiation,
615 diag::note_function_template_deduction_instantiation_here)
616 << FnTmpl
617 << getTemplateArgumentBindingsText(FnTmpl->getTemplateParameters(),
618 Active->TemplateArgs,
619 Active->NumTemplateArgs)
620 << Active->InstantiationRange;
621 } else {
622 bool IsVar = isa<VarTemplateDecl>(Active->Entity) ||
623 isa<VarTemplateSpecializationDecl>(Active->Entity);
624 bool IsTemplate = false;
625 TemplateParameterList *Params;
626 if (auto *D = dyn_cast<TemplateDecl>(Active->Entity)) {
627 IsTemplate = true;
628 Params = D->getTemplateParameters();
629 } else if (auto *D = dyn_cast<ClassTemplatePartialSpecializationDecl>(
630 Active->Entity)) {
631 Params = D->getTemplateParameters();
632 } else if (auto *D = dyn_cast<VarTemplatePartialSpecializationDecl>(
633 Active->Entity)) {
634 Params = D->getTemplateParameters();
635 } else {
636 llvm_unreachable("unexpected template kind")__builtin_unreachable();
637 }
638
639 Diags.Report(Active->PointOfInstantiation,
640 diag::note_deduced_template_arg_substitution_here)
641 << IsVar << IsTemplate << cast<NamedDecl>(Active->Entity)
642 << getTemplateArgumentBindingsText(Params, Active->TemplateArgs,
643 Active->NumTemplateArgs)
644 << Active->InstantiationRange;
645 }
646 break;
647 }
648
649 case CodeSynthesisContext::DefaultFunctionArgumentInstantiation: {
650 ParmVarDecl *Param = cast<ParmVarDecl>(Active->Entity);
651 FunctionDecl *FD = cast<FunctionDecl>(Param->getDeclContext());
652
653 SmallString<128> TemplateArgsStr;
654 llvm::raw_svector_ostream OS(TemplateArgsStr);
655 FD->printName(OS);
656 printTemplateArgumentList(OS, Active->template_arguments(),
657 getPrintingPolicy());
658 Diags.Report(Active->PointOfInstantiation,
659 diag::note_default_function_arg_instantiation_here)
660 << OS.str()
661 << Active->InstantiationRange;
662 break;
663 }
664
665 case CodeSynthesisContext::PriorTemplateArgumentSubstitution: {
666 NamedDecl *Parm = cast<NamedDecl>(Active->Entity);
667 std::string Name;
668 if (!Parm->getName().empty())
669 Name = std::string(" '") + Parm->getName().str() + "'";
670
671 TemplateParameterList *TemplateParams = nullptr;
672 if (TemplateDecl *Template = dyn_cast<TemplateDecl>(Active->Template))
673 TemplateParams = Template->getTemplateParameters();
674 else
675 TemplateParams =
676 cast<ClassTemplatePartialSpecializationDecl>(Active->Template)
677 ->getTemplateParameters();
678 Diags.Report(Active->PointOfInstantiation,
679 diag::note_prior_template_arg_substitution)
680 << isa<TemplateTemplateParmDecl>(Parm)
681 << Name
682 << getTemplateArgumentBindingsText(TemplateParams,
683 Active->TemplateArgs,
684 Active->NumTemplateArgs)
685 << Active->InstantiationRange;
686 break;
687 }
688
689 case CodeSynthesisContext::DefaultTemplateArgumentChecking: {
690 TemplateParameterList *TemplateParams = nullptr;
691 if (TemplateDecl *Template = dyn_cast<TemplateDecl>(Active->Template))
692 TemplateParams = Template->getTemplateParameters();
693 else
694 TemplateParams =
695 cast<ClassTemplatePartialSpecializationDecl>(Active->Template)
696 ->getTemplateParameters();
697
698 Diags.Report(Active->PointOfInstantiation,
699 diag::note_template_default_arg_checking)
700 << getTemplateArgumentBindingsText(TemplateParams,
701 Active->TemplateArgs,
702 Active->NumTemplateArgs)
703 << Active->InstantiationRange;
704 break;
705 }
706
707 case CodeSynthesisContext::ExceptionSpecEvaluation:
708 Diags.Report(Active->PointOfInstantiation,
709 diag::note_evaluating_exception_spec_here)
710 << cast<FunctionDecl>(Active->Entity);
711 break;
712
713 case CodeSynthesisContext::ExceptionSpecInstantiation:
714 Diags.Report(Active->PointOfInstantiation,
715 diag::note_template_exception_spec_instantiation_here)
716 << cast<FunctionDecl>(Active->Entity)
717 << Active->InstantiationRange;
718 break;
719
720 case CodeSynthesisContext::RequirementInstantiation:
721 Diags.Report(Active->PointOfInstantiation,
722 diag::note_template_requirement_instantiation_here)
723 << Active->InstantiationRange;
724 break;
725
726 case CodeSynthesisContext::NestedRequirementConstraintsCheck:
727 Diags.Report(Active->PointOfInstantiation,
728 diag::note_nested_requirement_here)
729 << Active->InstantiationRange;
730 break;
731
732 case CodeSynthesisContext::DeclaringSpecialMember:
733 Diags.Report(Active->PointOfInstantiation,
734 diag::note_in_declaration_of_implicit_special_member)
735 << cast<CXXRecordDecl>(Active->Entity) << Active->SpecialMember;
736 break;
737
738 case CodeSynthesisContext::DeclaringImplicitEqualityComparison:
739 Diags.Report(Active->Entity->getLocation(),
740 diag::note_in_declaration_of_implicit_equality_comparison);
741 break;
742
743 case CodeSynthesisContext::DefiningSynthesizedFunction: {
744 // FIXME: For synthesized functions that are not defaulted,
745 // produce a note.
746 auto *FD = dyn_cast<FunctionDecl>(Active->Entity);
747 DefaultedFunctionKind DFK =
748 FD ? getDefaultedFunctionKind(FD) : DefaultedFunctionKind();
749 if (DFK.isSpecialMember()) {
750 auto *MD = cast<CXXMethodDecl>(FD);
751 Diags.Report(Active->PointOfInstantiation,
752 diag::note_member_synthesized_at)
753 << MD->isExplicitlyDefaulted() << DFK.asSpecialMember()
754 << Context.getTagDeclType(MD->getParent());
755 } else if (DFK.isComparison()) {
756 Diags.Report(Active->PointOfInstantiation,
757 diag::note_comparison_synthesized_at)
758 << (int)DFK.asComparison()
759 << Context.getTagDeclType(
760 cast<CXXRecordDecl>(FD->getLexicalDeclContext()));
761 }
762 break;
763 }
764
765 case CodeSynthesisContext::RewritingOperatorAsSpaceship:
766 Diags.Report(Active->Entity->getLocation(),
767 diag::note_rewriting_operator_as_spaceship);
768 break;
769
770 case CodeSynthesisContext::InitializingStructuredBinding:
771 Diags.Report(Active->PointOfInstantiation,
772 diag::note_in_binding_decl_init)
773 << cast<BindingDecl>(Active->Entity);
774 break;
775
776 case CodeSynthesisContext::MarkingClassDllexported:
777 Diags.Report(Active->PointOfInstantiation,
778 diag::note_due_to_dllexported_class)
779 << cast<CXXRecordDecl>(Active->Entity) << !getLangOpts().CPlusPlus11;
780 break;
781
782 case CodeSynthesisContext::Memoization:
783 break;
784
785 case CodeSynthesisContext::ConstraintsCheck: {
786 unsigned DiagID = 0;
787 if (!Active->Entity) {
788 Diags.Report(Active->PointOfInstantiation,
789 diag::note_nested_requirement_here)
790 << Active->InstantiationRange;
791 break;
792 }
793 if (isa<ConceptDecl>(Active->Entity))
794 DiagID = diag::note_concept_specialization_here;
795 else if (isa<TemplateDecl>(Active->Entity))
796 DiagID = diag::note_checking_constraints_for_template_id_here;
797 else if (isa<VarTemplatePartialSpecializationDecl>(Active->Entity))
798 DiagID = diag::note_checking_constraints_for_var_spec_id_here;
799 else if (isa<ClassTemplatePartialSpecializationDecl>(Active->Entity))
800 DiagID = diag::note_checking_constraints_for_class_spec_id_here;
801 else {
802 assert(isa<FunctionDecl>(Active->Entity))(static_cast<void> (0));
803 DiagID = diag::note_checking_constraints_for_function_here;
804 }
805 SmallString<128> TemplateArgsStr;
806 llvm::raw_svector_ostream OS(TemplateArgsStr);
807 cast<NamedDecl>(Active->Entity)->printName(OS);
808 if (!isa<FunctionDecl>(Active->Entity)) {
809 printTemplateArgumentList(OS, Active->template_arguments(),
810 getPrintingPolicy());
811 }
812 Diags.Report(Active->PointOfInstantiation, DiagID) << OS.str()
813 << Active->InstantiationRange;
814 break;
815 }
816 case CodeSynthesisContext::ConstraintSubstitution:
817 Diags.Report(Active->PointOfInstantiation,
818 diag::note_constraint_substitution_here)
819 << Active->InstantiationRange;
820 break;
821 case CodeSynthesisContext::ConstraintNormalization:
822 Diags.Report(Active->PointOfInstantiation,
823 diag::note_constraint_normalization_here)
824 << cast<NamedDecl>(Active->Entity)->getName()
825 << Active->InstantiationRange;
826 break;
827 case CodeSynthesisContext::ParameterMappingSubstitution:
828 Diags.Report(Active->PointOfInstantiation,
829 diag::note_parameter_mapping_substitution_here)
830 << Active->InstantiationRange;
831 break;
832 }
833 }
834}
835
836Optional<TemplateDeductionInfo *> Sema::isSFINAEContext() const {
837 if (InNonInstantiationSFINAEContext)
838 return Optional<TemplateDeductionInfo *>(nullptr);
839
840 for (SmallVectorImpl<CodeSynthesisContext>::const_reverse_iterator
841 Active = CodeSynthesisContexts.rbegin(),
842 ActiveEnd = CodeSynthesisContexts.rend();
843 Active != ActiveEnd;
844 ++Active)
845 {
846 switch (Active->Kind) {
847 case CodeSynthesisContext::TemplateInstantiation:
848 // An instantiation of an alias template may or may not be a SFINAE
849 // context, depending on what else is on the stack.
850 if (isa<TypeAliasTemplateDecl>(Active->Entity))
851 break;
852 LLVM_FALLTHROUGH[[gnu::fallthrough]];
853 case CodeSynthesisContext::DefaultFunctionArgumentInstantiation:
854 case CodeSynthesisContext::ExceptionSpecInstantiation:
855 case CodeSynthesisContext::ConstraintsCheck:
856 case CodeSynthesisContext::ParameterMappingSubstitution:
857 case CodeSynthesisContext::ConstraintNormalization:
858 case CodeSynthesisContext::NestedRequirementConstraintsCheck:
859 // This is a template instantiation, so there is no SFINAE.
860 return None;
861
862 case CodeSynthesisContext::DefaultTemplateArgumentInstantiation:
863 case CodeSynthesisContext::PriorTemplateArgumentSubstitution:
864 case CodeSynthesisContext::DefaultTemplateArgumentChecking:
865 case CodeSynthesisContext::RewritingOperatorAsSpaceship:
866 // A default template argument instantiation and substitution into
867 // template parameters with arguments for prior parameters may or may
868 // not be a SFINAE context; look further up the stack.
869 break;
870
871 case CodeSynthesisContext::ExplicitTemplateArgumentSubstitution:
872 case CodeSynthesisContext::DeducedTemplateArgumentSubstitution:
873 case CodeSynthesisContext::ConstraintSubstitution:
874 case CodeSynthesisContext::RequirementInstantiation:
875 // We're either substituting explicitly-specified template arguments,
876 // deduced template arguments, a constraint expression or a requirement
877 // in a requires expression, so SFINAE applies.
878 assert(Active->DeductionInfo && "Missing deduction info pointer")(static_cast<void> (0));
879 return Active->DeductionInfo;
880
881 case CodeSynthesisContext::DeclaringSpecialMember:
882 case CodeSynthesisContext::DeclaringImplicitEqualityComparison:
883 case CodeSynthesisContext::DefiningSynthesizedFunction:
884 case CodeSynthesisContext::InitializingStructuredBinding:
885 case CodeSynthesisContext::MarkingClassDllexported:
886 // This happens in a context unrelated to template instantiation, so
887 // there is no SFINAE.
888 return None;
889
890 case CodeSynthesisContext::ExceptionSpecEvaluation:
891 // FIXME: This should not be treated as a SFINAE context, because
892 // we will cache an incorrect exception specification. However, clang
893 // bootstrap relies this! See PR31692.
894 break;
895
896 case CodeSynthesisContext::Memoization:
897 break;
898 }
899
900 // The inner context was transparent for SFINAE. If it occurred within a
901 // non-instantiation SFINAE context, then SFINAE applies.
902 if (Active->SavedInNonInstantiationSFINAEContext)
903 return Optional<TemplateDeductionInfo *>(nullptr);
904 }
905
906 return None;
907}
908
909//===----------------------------------------------------------------------===/
910// Template Instantiation for Types
911//===----------------------------------------------------------------------===/
912namespace {
913 class TemplateInstantiator : public TreeTransform<TemplateInstantiator> {
914 const MultiLevelTemplateArgumentList &TemplateArgs;
915 SourceLocation Loc;
916 DeclarationName Entity;
917
918 public:
919 typedef TreeTransform<TemplateInstantiator> inherited;
920
921 TemplateInstantiator(Sema &SemaRef,
922 const MultiLevelTemplateArgumentList &TemplateArgs,
923 SourceLocation Loc,
924 DeclarationName Entity)
925 : inherited(SemaRef), TemplateArgs(TemplateArgs), Loc(Loc),
926 Entity(Entity) { }
927
928 /// Determine whether the given type \p T has already been
929 /// transformed.
930 ///
931 /// For the purposes of template instantiation, a type has already been
932 /// transformed if it is NULL or if it is not dependent.
933 bool AlreadyTransformed(QualType T);
934
935 /// Returns the location of the entity being instantiated, if known.
936 SourceLocation getBaseLocation() { return Loc; }
937
938 /// Returns the name of the entity being instantiated, if any.
939 DeclarationName getBaseEntity() { return Entity; }
940
941 /// Sets the "base" location and entity when that
942 /// information is known based on another transformation.
943 void setBase(SourceLocation Loc, DeclarationName Entity) {
944 this->Loc = Loc;
945 this->Entity = Entity;
946 }
947
948 unsigned TransformTemplateDepth(unsigned Depth) {
949 return TemplateArgs.getNewDepth(Depth);
950 }
951
952 bool TryExpandParameterPacks(SourceLocation EllipsisLoc,
953 SourceRange PatternRange,
954 ArrayRef<UnexpandedParameterPack> Unexpanded,
955 bool &ShouldExpand, bool &RetainExpansion,
956 Optional<unsigned> &NumExpansions) {
957 return getSema().CheckParameterPacksForExpansion(EllipsisLoc,
958 PatternRange, Unexpanded,
959 TemplateArgs,
960 ShouldExpand,
961 RetainExpansion,
962 NumExpansions);
963 }
964
965 void ExpandingFunctionParameterPack(ParmVarDecl *Pack) {
966 SemaRef.CurrentInstantiationScope->MakeInstantiatedLocalArgPack(Pack);
967 }
968
969 TemplateArgument ForgetPartiallySubstitutedPack() {
970 TemplateArgument Result;
971 if (NamedDecl *PartialPack
972 = SemaRef.CurrentInstantiationScope->getPartiallySubstitutedPack()){
973 MultiLevelTemplateArgumentList &TemplateArgs
974 = const_cast<MultiLevelTemplateArgumentList &>(this->TemplateArgs);
975 unsigned Depth, Index;
976 std::tie(Depth, Index) = getDepthAndIndex(PartialPack);
977 if (TemplateArgs.hasTemplateArgument(Depth, Index)) {
978 Result = TemplateArgs(Depth, Index);
979 TemplateArgs.setArgument(Depth, Index, TemplateArgument());
980 }
981 }
982
983 return Result;
984 }
985
986 void RememberPartiallySubstitutedPack(TemplateArgument Arg) {
987 if (Arg.isNull())
988 return;
989
990 if (NamedDecl *PartialPack
991 = SemaRef.CurrentInstantiationScope->getPartiallySubstitutedPack()){
992 MultiLevelTemplateArgumentList &TemplateArgs
993 = const_cast<MultiLevelTemplateArgumentList &>(this->TemplateArgs);
994 unsigned Depth, Index;
995 std::tie(Depth, Index) = getDepthAndIndex(PartialPack);
996 TemplateArgs.setArgument(Depth, Index, Arg);
997 }
998 }
999
1000 /// Transform the given declaration by instantiating a reference to
1001 /// this declaration.
1002 Decl *TransformDecl(SourceLocation Loc, Decl *D);
1003
1004 void transformAttrs(Decl *Old, Decl *New) {
1005 SemaRef.InstantiateAttrs(TemplateArgs, Old, New);
1006 }
1007
1008 void transformedLocalDecl(Decl *Old, ArrayRef<Decl *> NewDecls) {
1009 if (Old->isParameterPack()) {
1010 SemaRef.CurrentInstantiationScope->MakeInstantiatedLocalArgPack(Old);
1011 for (auto *New : NewDecls)
1012 SemaRef.CurrentInstantiationScope->InstantiatedLocalPackArg(
1013 Old, cast<VarDecl>(New));
1014 return;
1015 }
1016
1017 assert(NewDecls.size() == 1 &&(static_cast<void> (0))
1018 "should only have multiple expansions for a pack")(static_cast<void> (0));
1019 Decl *New = NewDecls.front();
1020
1021 // If we've instantiated the call operator of a lambda or the call
1022 // operator template of a generic lambda, update the "instantiation of"
1023 // information.
1024 auto *NewMD = dyn_cast<CXXMethodDecl>(New);
1025 if (NewMD && isLambdaCallOperator(NewMD)) {
1026 auto *OldMD = dyn_cast<CXXMethodDecl>(Old);
1027 if (auto *NewTD = NewMD->getDescribedFunctionTemplate())
1028 NewTD->setInstantiatedFromMemberTemplate(
1029 OldMD->getDescribedFunctionTemplate());
1030 else
1031 NewMD->setInstantiationOfMemberFunction(OldMD,
1032 TSK_ImplicitInstantiation);
1033 }
1034
1035 SemaRef.CurrentInstantiationScope->InstantiatedLocal(Old, New);
1036
1037 // We recreated a local declaration, but not by instantiating it. There
1038 // may be pending dependent diagnostics to produce.
1039 if (auto *DC = dyn_cast<DeclContext>(Old))
1040 SemaRef.PerformDependentDiagnostics(DC, TemplateArgs);
1041 }
1042
1043 /// Transform the definition of the given declaration by
1044 /// instantiating it.
1045 Decl *TransformDefinition(SourceLocation Loc, Decl *D);
1046
1047 /// Transform the first qualifier within a scope by instantiating the
1048 /// declaration.
1049 NamedDecl *TransformFirstQualifierInScope(NamedDecl *D, SourceLocation Loc);
1050
1051 /// Rebuild the exception declaration and register the declaration
1052 /// as an instantiated local.
1053 VarDecl *RebuildExceptionDecl(VarDecl *ExceptionDecl,
1054 TypeSourceInfo *Declarator,
1055 SourceLocation StartLoc,
1056 SourceLocation NameLoc,
1057 IdentifierInfo *Name);
1058
1059 /// Rebuild the Objective-C exception declaration and register the
1060 /// declaration as an instantiated local.
1061 VarDecl *RebuildObjCExceptionDecl(VarDecl *ExceptionDecl,
1062 TypeSourceInfo *TSInfo, QualType T);
1063
1064 /// Check for tag mismatches when instantiating an
1065 /// elaborated type.
1066 QualType RebuildElaboratedType(SourceLocation KeywordLoc,
1067 ElaboratedTypeKeyword Keyword,
1068 NestedNameSpecifierLoc QualifierLoc,
1069 QualType T);
1070
1071 TemplateName
1072 TransformTemplateName(CXXScopeSpec &SS, TemplateName Name,
1073 SourceLocation NameLoc,
1074 QualType ObjectType = QualType(),
1075 NamedDecl *FirstQualifierInScope = nullptr,
1076 bool AllowInjectedClassName = false);
1077
1078 const LoopHintAttr *TransformLoopHintAttr(const LoopHintAttr *LH);
1079
1080 ExprResult TransformPredefinedExpr(PredefinedExpr *E);
1081 ExprResult TransformDeclRefExpr(DeclRefExpr *E);
1082 ExprResult TransformCXXDefaultArgExpr(CXXDefaultArgExpr *E);
1083
1084 ExprResult TransformTemplateParmRefExpr(DeclRefExpr *E,
1085 NonTypeTemplateParmDecl *D);
1086 ExprResult TransformSubstNonTypeTemplateParmPackExpr(
1087 SubstNonTypeTemplateParmPackExpr *E);
1088 ExprResult TransformSubstNonTypeTemplateParmExpr(
1089 SubstNonTypeTemplateParmExpr *E);
1090
1091 /// Rebuild a DeclRefExpr for a VarDecl reference.
1092 ExprResult RebuildVarDeclRefExpr(VarDecl *PD, SourceLocation Loc);
1093
1094 /// Transform a reference to a function or init-capture parameter pack.
1095 ExprResult TransformFunctionParmPackRefExpr(DeclRefExpr *E, VarDecl *PD);
1096
1097 /// Transform a FunctionParmPackExpr which was built when we couldn't
1098 /// expand a function parameter pack reference which refers to an expanded
1099 /// pack.
1100 ExprResult TransformFunctionParmPackExpr(FunctionParmPackExpr *E);
1101
1102 QualType TransformFunctionProtoType(TypeLocBuilder &TLB,
1103 FunctionProtoTypeLoc TL) {
1104 // Call the base version; it will forward to our overridden version below.
1105 return inherited::TransformFunctionProtoType(TLB, TL);
1106 }
1107
1108 template<typename Fn>
1109 QualType TransformFunctionProtoType(TypeLocBuilder &TLB,
1110 FunctionProtoTypeLoc TL,
1111 CXXRecordDecl *ThisContext,
1112 Qualifiers ThisTypeQuals,
1113 Fn TransformExceptionSpec);
1114
1115 ParmVarDecl *TransformFunctionTypeParam(ParmVarDecl *OldParm,
1116 int indexAdjustment,
1117 Optional<unsigned> NumExpansions,
1118 bool ExpectParameterPack);
1119
1120 /// Transforms a template type parameter type by performing
1121 /// substitution of the corresponding template type argument.
1122 QualType TransformTemplateTypeParmType(TypeLocBuilder &TLB,
1123 TemplateTypeParmTypeLoc TL);
1124
1125 /// Transforms an already-substituted template type parameter pack
1126 /// into either itself (if we aren't substituting into its pack expansion)
1127 /// or the appropriate substituted argument.
1128 QualType TransformSubstTemplateTypeParmPackType(TypeLocBuilder &TLB,
1129 SubstTemplateTypeParmPackTypeLoc TL);
1130
1131 ExprResult TransformLambdaExpr(LambdaExpr *E) {
1132 LocalInstantiationScope Scope(SemaRef, /*CombineWithOuterScope=*/true);
1133 return TreeTransform<TemplateInstantiator>::TransformLambdaExpr(E);
1134 }
1135
1136 ExprResult TransformRequiresExpr(RequiresExpr *E) {
1137 LocalInstantiationScope Scope(SemaRef, /*CombineWithOuterScope=*/true);
1138 return TreeTransform<TemplateInstantiator>::TransformRequiresExpr(E);
1139 }
1140
1141 bool TransformRequiresExprRequirements(
1142 ArrayRef<concepts::Requirement *> Reqs,
1143 SmallVectorImpl<concepts::Requirement *> &Transformed) {
1144 bool SatisfactionDetermined = false;
1145 for (concepts::Requirement *Req : Reqs) {
1146 concepts::Requirement *TransReq = nullptr;
1147 if (!SatisfactionDetermined) {
1148 if (auto *TypeReq = dyn_cast<concepts::TypeRequirement>(Req))
1149 TransReq = TransformTypeRequirement(TypeReq);
1150 else if (auto *ExprReq = dyn_cast<concepts::ExprRequirement>(Req))
1151 TransReq = TransformExprRequirement(ExprReq);
1152 else
1153 TransReq = TransformNestedRequirement(
1154 cast<concepts::NestedRequirement>(Req));
1155 if (!TransReq)
1156 return true;
1157 if (!TransReq->isDependent() && !TransReq->isSatisfied())
1158 // [expr.prim.req]p6
1159 // [...] The substitution and semantic constraint checking
1160 // proceeds in lexical order and stops when a condition that
1161 // determines the result of the requires-expression is
1162 // encountered. [..]
1163 SatisfactionDetermined = true;
1164 } else
1165 TransReq = Req;
1166 Transformed.push_back(TransReq);
1167 }
1168 return false;
1169 }
1170
1171 TemplateParameterList *TransformTemplateParameterList(
1172 TemplateParameterList *OrigTPL) {
1173 if (!OrigTPL || !OrigTPL->size()) return OrigTPL;
1174
1175 DeclContext *Owner = OrigTPL->getParam(0)->getDeclContext();
1176 TemplateDeclInstantiator DeclInstantiator(getSema(),
1177 /* DeclContext *Owner */ Owner, TemplateArgs);
1178 return DeclInstantiator.SubstTemplateParams(OrigTPL);
1179 }
1180
1181 concepts::TypeRequirement *
1182 TransformTypeRequirement(concepts::TypeRequirement *Req);
1183 concepts::ExprRequirement *
1184 TransformExprRequirement(concepts::ExprRequirement *Req);
1185 concepts::NestedRequirement *
1186 TransformNestedRequirement(concepts::NestedRequirement *Req);
1187
1188 private:
1189 ExprResult transformNonTypeTemplateParmRef(NonTypeTemplateParmDecl *parm,
1190 SourceLocation loc,
1191 TemplateArgument arg);
1192 };
1193}
1194
1195bool TemplateInstantiator::AlreadyTransformed(QualType T) {
1196 if (T.isNull())
1197 return true;
1198
1199 if (T->isInstantiationDependentType() || T->isVariablyModifiedType())
1200 return false;
1201
1202 getSema().MarkDeclarationsReferencedInType(Loc, T);
1203 return true;
1204}
1205
1206static TemplateArgument
1207getPackSubstitutedTemplateArgument(Sema &S, TemplateArgument Arg) {
1208 assert(S.ArgumentPackSubstitutionIndex >= 0)(static_cast<void> (0));
1209 assert(S.ArgumentPackSubstitutionIndex < (int)Arg.pack_size())(static_cast<void> (0));
1210 Arg = Arg.pack_begin()[S.ArgumentPackSubstitutionIndex];
1211 if (Arg.isPackExpansion())
1212 Arg = Arg.getPackExpansionPattern();
1213 return Arg;
1214}
1215
1216Decl *TemplateInstantiator::TransformDecl(SourceLocation Loc, Decl *D) {
1217 if (!D)
1218 return nullptr;
1219
1220 if (TemplateTemplateParmDecl *TTP = dyn_cast<TemplateTemplateParmDecl>(D)) {
1221 if (TTP->getDepth() < TemplateArgs.getNumLevels()) {
1222 // If the corresponding template argument is NULL or non-existent, it's
1223 // because we are performing instantiation from explicitly-specified
1224 // template arguments in a function template, but there were some
1225 // arguments left unspecified.
1226 if (!TemplateArgs.hasTemplateArgument(TTP->getDepth(),
1227 TTP->getPosition()))
1228 return D;
1229
1230 TemplateArgument Arg = TemplateArgs(TTP->getDepth(), TTP->getPosition());
1231
1232 if (TTP->isParameterPack()) {
1233 assert(Arg.getKind() == TemplateArgument::Pack &&(static_cast<void> (0))
1234 "Missing argument pack")(static_cast<void> (0));
1235 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1236 }
1237
1238 TemplateName Template = Arg.getAsTemplate().getNameToSubstitute();
1239 assert(!Template.isNull() && Template.getAsTemplateDecl() &&(static_cast<void> (0))
1240 "Wrong kind of template template argument")(static_cast<void> (0));
1241 return Template.getAsTemplateDecl();
1242 }
1243
1244 // Fall through to find the instantiated declaration for this template
1245 // template parameter.
1246 }
1247
1248 return SemaRef.FindInstantiatedDecl(Loc, cast<NamedDecl>(D), TemplateArgs);
1249}
1250
1251Decl *TemplateInstantiator::TransformDefinition(SourceLocation Loc, Decl *D) {
1252 Decl *Inst = getSema().SubstDecl(D, getSema().CurContext, TemplateArgs);
1253 if (!Inst)
1254 return nullptr;
1255
1256 getSema().CurrentInstantiationScope->InstantiatedLocal(D, Inst);
1257 return Inst;
1258}
1259
1260NamedDecl *
1261TemplateInstantiator::TransformFirstQualifierInScope(NamedDecl *D,
1262 SourceLocation Loc) {
1263 // If the first part of the nested-name-specifier was a template type
1264 // parameter, instantiate that type parameter down to a tag type.
1265 if (TemplateTypeParmDecl *TTPD = dyn_cast_or_null<TemplateTypeParmDecl>(D)) {
1266 const TemplateTypeParmType *TTP
1267 = cast<TemplateTypeParmType>(getSema().Context.getTypeDeclType(TTPD));
1268
1269 if (TTP->getDepth() < TemplateArgs.getNumLevels()) {
1270 // FIXME: This needs testing w/ member access expressions.
1271 TemplateArgument Arg = TemplateArgs(TTP->getDepth(), TTP->getIndex());
1272
1273 if (TTP->isParameterPack()) {
1274 assert(Arg.getKind() == TemplateArgument::Pack &&(static_cast<void> (0))
1275 "Missing argument pack")(static_cast<void> (0));
1276
1277 if (getSema().ArgumentPackSubstitutionIndex == -1)
1278 return nullptr;
1279
1280 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1281 }
1282
1283 QualType T = Arg.getAsType();
1284 if (T.isNull())
1285 return cast_or_null<NamedDecl>(TransformDecl(Loc, D));
1286
1287 if (const TagType *Tag = T->getAs<TagType>())
1288 return Tag->getDecl();
1289
1290 // The resulting type is not a tag; complain.
1291 getSema().Diag(Loc, diag::err_nested_name_spec_non_tag) << T;
1292 return nullptr;
1293 }
1294 }
1295
1296 return cast_or_null<NamedDecl>(TransformDecl(Loc, D));
1297}
1298
1299VarDecl *
1300TemplateInstantiator::RebuildExceptionDecl(VarDecl *ExceptionDecl,
1301 TypeSourceInfo *Declarator,
1302 SourceLocation StartLoc,
1303 SourceLocation NameLoc,
1304 IdentifierInfo *Name) {
1305 VarDecl *Var = inherited::RebuildExceptionDecl(ExceptionDecl, Declarator,
1306 StartLoc, NameLoc, Name);
1307 if (Var)
1308 getSema().CurrentInstantiationScope->InstantiatedLocal(ExceptionDecl, Var);
1309 return Var;
1310}
1311
1312VarDecl *TemplateInstantiator::RebuildObjCExceptionDecl(VarDecl *ExceptionDecl,
1313 TypeSourceInfo *TSInfo,
1314 QualType T) {
1315 VarDecl *Var = inherited::RebuildObjCExceptionDecl(ExceptionDecl, TSInfo, T);
1316 if (Var)
1317 getSema().CurrentInstantiationScope->InstantiatedLocal(ExceptionDecl, Var);
1318 return Var;
1319}
1320
1321QualType
1322TemplateInstantiator::RebuildElaboratedType(SourceLocation KeywordLoc,
1323 ElaboratedTypeKeyword Keyword,
1324 NestedNameSpecifierLoc QualifierLoc,
1325 QualType T) {
1326 if (const TagType *TT = T->getAs<TagType>()) {
1327 TagDecl* TD = TT->getDecl();
1328
1329 SourceLocation TagLocation = KeywordLoc;
1330
1331 IdentifierInfo *Id = TD->getIdentifier();
1332
1333 // TODO: should we even warn on struct/class mismatches for this? Seems
1334 // like it's likely to produce a lot of spurious errors.
1335 if (Id && Keyword != ETK_None && Keyword != ETK_Typename) {
1336 TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForKeyword(Keyword);
1337 if (!SemaRef.isAcceptableTagRedeclaration(TD, Kind, /*isDefinition*/false,
1338 TagLocation, Id)) {
1339 SemaRef.Diag(TagLocation, diag::err_use_with_wrong_tag)
1340 << Id
1341 << FixItHint::CreateReplacement(SourceRange(TagLocation),
1342 TD->getKindName());
1343 SemaRef.Diag(TD->getLocation(), diag::note_previous_use);
1344 }
1345 }
1346 }
1347
1348 return TreeTransform<TemplateInstantiator>::RebuildElaboratedType(KeywordLoc,
1349 Keyword,
1350 QualifierLoc,
1351 T);
1352}
1353
1354TemplateName TemplateInstantiator::TransformTemplateName(
1355 CXXScopeSpec &SS, TemplateName Name, SourceLocation NameLoc,
1356 QualType ObjectType, NamedDecl *FirstQualifierInScope,
1357 bool AllowInjectedClassName) {
1358 if (TemplateTemplateParmDecl *TTP
1359 = dyn_cast_or_null<TemplateTemplateParmDecl>(Name.getAsTemplateDecl())) {
1360 if (TTP->getDepth() < TemplateArgs.getNumLevels()) {
1361 // If the corresponding template argument is NULL or non-existent, it's
1362 // because we are performing instantiation from explicitly-specified
1363 // template arguments in a function template, but there were some
1364 // arguments left unspecified.
1365 if (!TemplateArgs.hasTemplateArgument(TTP->getDepth(),
1366 TTP->getPosition()))
1367 return Name;
1368
1369 TemplateArgument Arg = TemplateArgs(TTP->getDepth(), TTP->getPosition());
1370
1371 if (TemplateArgs.isRewrite()) {
1372 // We're rewriting the template parameter as a reference to another
1373 // template parameter.
1374 if (Arg.getKind() == TemplateArgument::Pack) {
1375 assert(Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion() &&(static_cast<void> (0))
1376 "unexpected pack arguments in template rewrite")(static_cast<void> (0));
1377 Arg = Arg.pack_begin()->getPackExpansionPattern();
1378 }
1379 assert(Arg.getKind() == TemplateArgument::Template &&(static_cast<void> (0))
1380 "unexpected nontype template argument kind in template rewrite")(static_cast<void> (0));
1381 return Arg.getAsTemplate();
1382 }
1383
1384 if (TTP->isParameterPack()) {
1385 assert(Arg.getKind() == TemplateArgument::Pack &&(static_cast<void> (0))
1386 "Missing argument pack")(static_cast<void> (0));
1387
1388 if (getSema().ArgumentPackSubstitutionIndex == -1) {
1389 // We have the template argument pack to substitute, but we're not
1390 // actually expanding the enclosing pack expansion yet. So, just
1391 // keep the entire argument pack.
1392 return getSema().Context.getSubstTemplateTemplateParmPack(TTP, Arg);
1393 }
1394
1395 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1396 }
1397
1398 TemplateName Template = Arg.getAsTemplate().getNameToSubstitute();
1399 assert(!Template.isNull() && "Null template template argument")(static_cast<void> (0));
1400 assert(!Template.getAsQualifiedTemplateName() &&(static_cast<void> (0))
1401 "template decl to substitute is qualified?")(static_cast<void> (0));
1402
1403 Template = getSema().Context.getSubstTemplateTemplateParm(TTP, Template);
1404 return Template;
1405 }
1406 }
1407
1408 if (SubstTemplateTemplateParmPackStorage *SubstPack
1409 = Name.getAsSubstTemplateTemplateParmPack()) {
1410 if (getSema().ArgumentPackSubstitutionIndex == -1)
1411 return Name;
1412
1413 TemplateArgument Arg = SubstPack->getArgumentPack();
1414 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1415 return Arg.getAsTemplate().getNameToSubstitute();
1416 }
1417
1418 return inherited::TransformTemplateName(SS, Name, NameLoc, ObjectType,
1419 FirstQualifierInScope,
1420 AllowInjectedClassName);
1421}
1422
1423ExprResult
1424TemplateInstantiator::TransformPredefinedExpr(PredefinedExpr *E) {
1425 if (!E->isTypeDependent())
1426 return E;
1427
1428 return getSema().BuildPredefinedExpr(E->getLocation(), E->getIdentKind());
1429}
1430
1431ExprResult
1432TemplateInstantiator::TransformTemplateParmRefExpr(DeclRefExpr *E,
1433 NonTypeTemplateParmDecl *NTTP) {
1434 // If the corresponding template argument is NULL or non-existent, it's
1435 // because we are performing instantiation from explicitly-specified
1436 // template arguments in a function template, but there were some
1437 // arguments left unspecified.
1438 if (!TemplateArgs.hasTemplateArgument(NTTP->getDepth(),
1439 NTTP->getPosition()))
1440 return E;
1441
1442 TemplateArgument Arg = TemplateArgs(NTTP->getDepth(), NTTP->getPosition());
1443
1444 if (TemplateArgs.isRewrite()) {
1445 // We're rewriting the template parameter as a reference to another
1446 // template parameter.
1447 if (Arg.getKind() == TemplateArgument::Pack) {
1448 assert(Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion() &&(static_cast<void> (0))
1449 "unexpected pack arguments in template rewrite")(static_cast<void> (0));
1450 Arg = Arg.pack_begin()->getPackExpansionPattern();
1451 }
1452 assert(Arg.getKind() == TemplateArgument::Expression &&(static_cast<void> (0))
1453 "unexpected nontype template argument kind in template rewrite")(static_cast<void> (0));
1454 // FIXME: This can lead to the same subexpression appearing multiple times
1455 // in a complete expression.
1456 return Arg.getAsExpr();
1457 }
1458
1459 if (NTTP->isParameterPack()) {
1460 assert(Arg.getKind() == TemplateArgument::Pack &&(static_cast<void> (0))
1461 "Missing argument pack")(static_cast<void> (0));
1462
1463 if (getSema().ArgumentPackSubstitutionIndex == -1) {
1464 // We have an argument pack, but we can't select a particular argument
1465 // out of it yet. Therefore, we'll build an expression to hold on to that
1466 // argument pack.
1467 QualType TargetType = SemaRef.SubstType(NTTP->getType(), TemplateArgs,
1468 E->getLocation(),
1469 NTTP->getDeclName());
1470 if (TargetType.isNull())
1471 return ExprError();
1472
1473 QualType ExprType = TargetType.getNonLValueExprType(SemaRef.Context);
1474 if (TargetType->isRecordType())
1475 ExprType.addConst();
1476
1477 return new (SemaRef.Context) SubstNonTypeTemplateParmPackExpr(
1478 ExprType, TargetType->isReferenceType() ? VK_LValue : VK_PRValue,
1479 NTTP, E->getLocation(), Arg);
1480 }
1481
1482 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1483 }
1484
1485 return transformNonTypeTemplateParmRef(NTTP, E->getLocation(), Arg);
1486}
1487
1488const LoopHintAttr *
1489TemplateInstantiator::TransformLoopHintAttr(const LoopHintAttr *LH) {
1490 Expr *TransformedExpr = getDerived().TransformExpr(LH->getValue()).get();
1491
1492 if (TransformedExpr == LH->getValue())
1493 return LH;
1494
1495 // Generate error if there is a problem with the value.
1496 if (getSema().CheckLoopHintExpr(TransformedExpr, LH->getLocation()))
1497 return LH;
1498
1499 // Create new LoopHintValueAttr with integral expression in place of the
1500 // non-type template parameter.
1501 return LoopHintAttr::CreateImplicit(getSema().Context, LH->getOption(),
1502 LH->getState(), TransformedExpr, *LH);
1503}
1504
1505ExprResult TemplateInstantiator::transformNonTypeTemplateParmRef(
1506 NonTypeTemplateParmDecl *parm,
1507 SourceLocation loc,
1508 TemplateArgument arg) {
1509 ExprResult result;
1510
1511 // Determine the substituted parameter type. We can usually infer this from
1512 // the template argument, but not always.
1513 auto SubstParamType = [&] {
1514 QualType T;
1515 if (parm->isExpandedParameterPack())
1516 T = parm->getExpansionType(SemaRef.ArgumentPackSubstitutionIndex);
1517 else
1518 T = parm->getType();
1519 if (parm->isParameterPack() && isa<PackExpansionType>(T))
1520 T = cast<PackExpansionType>(T)->getPattern();
1521 return SemaRef.SubstType(T, TemplateArgs, loc, parm->getDeclName());
1522 };
1523
1524 bool refParam = false;
1525
1526 // The template argument itself might be an expression, in which case we just
1527 // return that expression. This happens when substituting into an alias
1528 // template.
1529 if (arg.getKind() == TemplateArgument::Expression) {
1530 Expr *argExpr = arg.getAsExpr();
1531 result = argExpr;
1532 if (argExpr->isLValue()) {
1533 if (argExpr->getType()->isRecordType()) {
1534 // Check whether the parameter was actually a reference.
1535 QualType paramType = SubstParamType();
1536 if (paramType.isNull())
1537 return ExprError();
1538 refParam = paramType->isReferenceType();
1539 } else {
1540 refParam = true;
1541 }
1542 }
1543 } else if (arg.getKind() == TemplateArgument::Declaration ||
1544 arg.getKind() == TemplateArgument::NullPtr) {
1545 ValueDecl *VD;
1546 if (arg.getKind() == TemplateArgument::Declaration) {
1547 VD = arg.getAsDecl();
1548
1549 // Find the instantiation of the template argument. This is
1550 // required for nested templates.
1551 VD = cast_or_null<ValueDecl>(
1552 getSema().FindInstantiatedDecl(loc, VD, TemplateArgs));
1553 if (!VD)
1554 return ExprError();
1555 } else {
1556 // Propagate NULL template argument.
1557 VD = nullptr;
1558 }
1559
1560 QualType paramType = VD ? arg.getParamTypeForDecl() : arg.getNullPtrType();
1561 assert(!paramType.isNull() && "type substitution failed for param type")(static_cast<void> (0));
1562 assert(!paramType->isDependentType() && "param type still dependent")(static_cast<void> (0));
1563 result = SemaRef.BuildExpressionFromDeclTemplateArgument(arg, paramType, loc);
1564 refParam = paramType->isReferenceType();
1565 } else {
1566 result = SemaRef.BuildExpressionFromIntegralTemplateArgument(arg, loc);
1567 assert(result.isInvalid() ||(static_cast<void> (0))
1568 SemaRef.Context.hasSameType(result.get()->getType(),(static_cast<void> (0))
1569 arg.getIntegralType()))(static_cast<void> (0));
1570 }
1571
1572 if (result.isInvalid())
1573 return ExprError();
1574
1575 Expr *resultExpr = result.get();
1576 return new (SemaRef.Context) SubstNonTypeTemplateParmExpr(
1577 resultExpr->getType(), resultExpr->getValueKind(), loc, parm, refParam,
1578 resultExpr);
1579}
1580
1581ExprResult
1582TemplateInstantiator::TransformSubstNonTypeTemplateParmPackExpr(
1583 SubstNonTypeTemplateParmPackExpr *E) {
1584 if (getSema().ArgumentPackSubstitutionIndex == -1) {
1585 // We aren't expanding the parameter pack, so just return ourselves.
1586 return E;
1587 }
1588
1589 TemplateArgument Arg = E->getArgumentPack();
1590 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1591 return transformNonTypeTemplateParmRef(E->getParameterPack(),
1592 E->getParameterPackLocation(),
1593 Arg);
1594}
1595
1596ExprResult
1597TemplateInstantiator::TransformSubstNonTypeTemplateParmExpr(
1598 SubstNonTypeTemplateParmExpr *E) {
1599 ExprResult SubstReplacement = E->getReplacement();
1600 if (!isa<ConstantExpr>(SubstReplacement.get()))
1601 SubstReplacement = TransformExpr(E->getReplacement());
1602 if (SubstReplacement.isInvalid())
1603 return true;
1604 QualType SubstType = TransformType(E->getParameterType(getSema().Context));
1605 if (SubstType.isNull())
1606 return true;
1607 // The type may have been previously dependent and not now, which means we
1608 // might have to implicit cast the argument to the new type, for example:
1609 // template<auto T, decltype(T) U>
1610 // concept C = sizeof(U) == 4;
1611 // void foo() requires C<2, 'a'> { }
1612 // When normalizing foo(), we first form the normalized constraints of C:
1613 // AtomicExpr(sizeof(U) == 4,
1614 // U=SubstNonTypeTemplateParmExpr(Param=U,
1615 // Expr=DeclRef(U),
1616 // Type=decltype(T)))
1617 // Then we substitute T = 2, U = 'a' into the parameter mapping, and need to
1618 // produce:
1619 // AtomicExpr(sizeof(U) == 4,
1620 // U=SubstNonTypeTemplateParmExpr(Param=U,
1621 // Expr=ImpCast(
1622 // decltype(2),
1623 // SubstNTTPE(Param=U, Expr='a',
1624 // Type=char)),
1625 // Type=decltype(2)))
1626 // The call to CheckTemplateArgument here produces the ImpCast.
1627 TemplateArgument Converted;
1628 if (SemaRef.CheckTemplateArgument(E->getParameter(), SubstType,
1629 SubstReplacement.get(),
1630 Converted).isInvalid())
1631 return true;
1632 return transformNonTypeTemplateParmRef(E->getParameter(),
1633 E->getExprLoc(), Converted);
1634}
1635
1636ExprResult TemplateInstantiator::RebuildVarDeclRefExpr(VarDecl *PD,
1637 SourceLocation Loc) {
1638 DeclarationNameInfo NameInfo(PD->getDeclName(), Loc);
1639 return getSema().BuildDeclarationNameExpr(CXXScopeSpec(), NameInfo, PD);
1640}
1641
1642ExprResult
1643TemplateInstantiator::TransformFunctionParmPackExpr(FunctionParmPackExpr *E) {
1644 if (getSema().ArgumentPackSubstitutionIndex != -1) {
1645 // We can expand this parameter pack now.
1646 VarDecl *D = E->getExpansion(getSema().ArgumentPackSubstitutionIndex);
1647 VarDecl *VD = cast_or_null<VarDecl>(TransformDecl(E->getExprLoc(), D));
1648 if (!VD)
1649 return ExprError();
1650 return RebuildVarDeclRefExpr(VD, E->getExprLoc());
1651 }
1652
1653 QualType T = TransformType(E->getType());
1654 if (T.isNull())
1655 return ExprError();
1656
1657 // Transform each of the parameter expansions into the corresponding
1658 // parameters in the instantiation of the function decl.
1659 SmallVector<VarDecl *, 8> Vars;
1660 Vars.reserve(E->getNumExpansions());
1661 for (FunctionParmPackExpr::iterator I = E->begin(), End = E->end();
1662 I != End; ++I) {
1663 VarDecl *D = cast_or_null<VarDecl>(TransformDecl(E->getExprLoc(), *I));
1664 if (!D)
1665 return ExprError();
1666 Vars.push_back(D);
1667 }
1668
1669 auto *PackExpr =
1670 FunctionParmPackExpr::Create(getSema().Context, T, E->getParameterPack(),
1671 E->getParameterPackLocation(), Vars);
1672 getSema().MarkFunctionParmPackReferenced(PackExpr);
1673 return PackExpr;
1674}
1675
1676ExprResult
1677TemplateInstantiator::TransformFunctionParmPackRefExpr(DeclRefExpr *E,
1678 VarDecl *PD) {
1679 typedef LocalInstantiationScope::DeclArgumentPack DeclArgumentPack;
1680 llvm::PointerUnion<Decl *, DeclArgumentPack *> *Found
1681 = getSema().CurrentInstantiationScope->findInstantiationOf(PD);
1682 assert(Found && "no instantiation for parameter pack")(static_cast<void> (0));
1683
1684 Decl *TransformedDecl;
1685 if (DeclArgumentPack *Pack = Found->dyn_cast<DeclArgumentPack *>()) {
1686 // If this is a reference to a function parameter pack which we can
1687 // substitute but can't yet expand, build a FunctionParmPackExpr for it.
1688 if (getSema().ArgumentPackSubstitutionIndex == -1) {
1689 QualType T = TransformType(E->getType());
1690 if (T.isNull())
1691 return ExprError();
1692 auto *PackExpr = FunctionParmPackExpr::Create(getSema().Context, T, PD,
1693 E->getExprLoc(), *Pack);
1694 getSema().MarkFunctionParmPackReferenced(PackExpr);
1695 return PackExpr;
1696 }
1697
1698 TransformedDecl = (*Pack)[getSema().ArgumentPackSubstitutionIndex];
1699 } else {
1700 TransformedDecl = Found->get<Decl*>();
1701 }
1702
1703 // We have either an unexpanded pack or a specific expansion.
1704 return RebuildVarDeclRefExpr(cast<VarDecl>(TransformedDecl), E->getExprLoc());
1705}
1706
1707ExprResult
1708TemplateInstantiator::TransformDeclRefExpr(DeclRefExpr *E) {
1709 NamedDecl *D = E->getDecl();
1710
1711 // Handle references to non-type template parameters and non-type template
1712 // parameter packs.
1713 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(D)) {
1714 if (NTTP->getDepth() < TemplateArgs.getNumLevels())
1715 return TransformTemplateParmRefExpr(E, NTTP);
1716
1717 // We have a non-type template parameter that isn't fully substituted;
1718 // FindInstantiatedDecl will find it in the local instantiation scope.
1719 }
1720
1721 // Handle references to function parameter packs.
1722 if (VarDecl *PD = dyn_cast<VarDecl>(D))
1723 if (PD->isParameterPack())
1724 return TransformFunctionParmPackRefExpr(E, PD);
1725
1726 return TreeTransform<TemplateInstantiator>::TransformDeclRefExpr(E);
1727}
1728
1729ExprResult TemplateInstantiator::TransformCXXDefaultArgExpr(
1730 CXXDefaultArgExpr *E) {
1731 assert(!cast<FunctionDecl>(E->getParam()->getDeclContext())->(static_cast<void> (0))
1732 getDescribedFunctionTemplate() &&(static_cast<void> (0))
1733 "Default arg expressions are never formed in dependent cases.")(static_cast<void> (0));
1734 return SemaRef.BuildCXXDefaultArgExpr(E->getUsedLocation(),
1735 cast<FunctionDecl>(E->getParam()->getDeclContext()),
1736 E->getParam());
1737}
1738
1739template<typename Fn>
1740QualType TemplateInstantiator::TransformFunctionProtoType(TypeLocBuilder &TLB,
1741 FunctionProtoTypeLoc TL,
1742 CXXRecordDecl *ThisContext,
1743 Qualifiers ThisTypeQuals,
1744 Fn TransformExceptionSpec) {
1745 // We need a local instantiation scope for this function prototype.
1746 LocalInstantiationScope Scope(SemaRef, /*CombineWithOuterScope=*/true);
1747 return inherited::TransformFunctionProtoType(
1748 TLB, TL, ThisContext, ThisTypeQuals, TransformExceptionSpec);
1749}
1750
1751ParmVarDecl *
1752TemplateInstantiator::TransformFunctionTypeParam(ParmVarDecl *OldParm,
1753 int indexAdjustment,
1754 Optional<unsigned> NumExpansions,
1755 bool ExpectParameterPack) {
1756 auto NewParm =
1757 SemaRef.SubstParmVarDecl(OldParm, TemplateArgs, indexAdjustment,
1758 NumExpansions, ExpectParameterPack);
1759 if (NewParm && SemaRef.getLangOpts().OpenCL)
1760 SemaRef.deduceOpenCLAddressSpace(NewParm);
1761 return NewParm;
1762}
1763
1764QualType
1765TemplateInstantiator::TransformTemplateTypeParmType(TypeLocBuilder &TLB,
1766 TemplateTypeParmTypeLoc TL) {
1767 const TemplateTypeParmType *T = TL.getTypePtr();
1768 if (T->getDepth() < TemplateArgs.getNumLevels()) {
1769 // Replace the template type parameter with its corresponding
1770 // template argument.
1771
1772 // If the corresponding template argument is NULL or doesn't exist, it's
1773 // because we are performing instantiation from explicitly-specified
1774 // template arguments in a function template class, but there were some
1775 // arguments left unspecified.
1776 if (!TemplateArgs.hasTemplateArgument(T->getDepth(), T->getIndex())) {
1777 TemplateTypeParmTypeLoc NewTL
1778 = TLB.push<TemplateTypeParmTypeLoc>(TL.getType());
1779 NewTL.setNameLoc(TL.getNameLoc());
1780 return TL.getType();
1781 }
1782
1783 TemplateArgument Arg = TemplateArgs(T->getDepth(), T->getIndex());
1784
1785 if (TemplateArgs.isRewrite()) {
1786 // We're rewriting the template parameter as a reference to another
1787 // template parameter.
1788 if (Arg.getKind() == TemplateArgument::Pack) {
1789 assert(Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion() &&(static_cast<void> (0))
1790 "unexpected pack arguments in template rewrite")(static_cast<void> (0));
1791 Arg = Arg.pack_begin()->getPackExpansionPattern();
1792 }
1793 assert(Arg.getKind() == TemplateArgument::Type &&(static_cast<void> (0))
1794 "unexpected nontype template argument kind in template rewrite")(static_cast<void> (0));
1795 QualType NewT = Arg.getAsType();
1796 assert(isa<TemplateTypeParmType>(NewT) &&(static_cast<void> (0))
1797 "type parm not rewritten to type parm")(static_cast<void> (0));
1798 auto NewTL = TLB.push<TemplateTypeParmTypeLoc>(NewT);
1799 NewTL.setNameLoc(TL.getNameLoc());
1800 return NewT;
1801 }
1802
1803 if (T->isParameterPack()) {
1804 assert(Arg.getKind() == TemplateArgument::Pack &&(static_cast<void> (0))
1805 "Missing argument pack")(static_cast<void> (0));
1806
1807 if (getSema().ArgumentPackSubstitutionIndex == -1) {
1808 // We have the template argument pack, but we're not expanding the
1809 // enclosing pack expansion yet. Just save the template argument
1810 // pack for later substitution.
1811 QualType Result
1812 = getSema().Context.getSubstTemplateTypeParmPackType(T, Arg);
1813 SubstTemplateTypeParmPackTypeLoc NewTL
1814 = TLB.push<SubstTemplateTypeParmPackTypeLoc>(Result);
1815 NewTL.setNameLoc(TL.getNameLoc());
1816 return Result;
1817 }
1818
1819 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1820 }
1821
1822 assert(Arg.getKind() == TemplateArgument::Type &&(static_cast<void> (0))
1823 "Template argument kind mismatch")(static_cast<void> (0));
1824
1825 QualType Replacement = Arg.getAsType();
1826
1827 // TODO: only do this uniquing once, at the start of instantiation.
1828 QualType Result
1829 = getSema().Context.getSubstTemplateTypeParmType(T, Replacement);
1830 SubstTemplateTypeParmTypeLoc NewTL
1831 = TLB.push<SubstTemplateTypeParmTypeLoc>(Result);
1832 NewTL.setNameLoc(TL.getNameLoc());
1833 return Result;
1834 }
1835
1836 // The template type parameter comes from an inner template (e.g.,
1837 // the template parameter list of a member template inside the
1838 // template we are instantiating). Create a new template type
1839 // parameter with the template "level" reduced by one.
1840 TemplateTypeParmDecl *NewTTPDecl = nullptr;
1841 if (TemplateTypeParmDecl *OldTTPDecl = T->getDecl())
1842 NewTTPDecl = cast_or_null<TemplateTypeParmDecl>(
1843 TransformDecl(TL.getNameLoc(), OldTTPDecl));
1844
1845 QualType Result = getSema().Context.getTemplateTypeParmType(
1846 T->getDepth() - TemplateArgs.getNumSubstitutedLevels(), T->getIndex(),
1847 T->isParameterPack(), NewTTPDecl);
1848 TemplateTypeParmTypeLoc NewTL = TLB.push<TemplateTypeParmTypeLoc>(Result);
1849 NewTL.setNameLoc(TL.getNameLoc());
1850 return Result;
1851}
1852
1853QualType
1854TemplateInstantiator::TransformSubstTemplateTypeParmPackType(
1855 TypeLocBuilder &TLB,
1856 SubstTemplateTypeParmPackTypeLoc TL) {
1857 if (getSema().ArgumentPackSubstitutionIndex == -1) {
1858 // We aren't expanding the parameter pack, so just return ourselves.
1859 SubstTemplateTypeParmPackTypeLoc NewTL
1860 = TLB.push<SubstTemplateTypeParmPackTypeLoc>(TL.getType());
1861 NewTL.setNameLoc(TL.getNameLoc());
1862 return TL.getType();
1863 }
1864
1865 TemplateArgument Arg = TL.getTypePtr()->getArgumentPack();
1866 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1867 QualType Result = Arg.getAsType();
1868
1869 Result = getSema().Context.getSubstTemplateTypeParmType(
1870 TL.getTypePtr()->getReplacedParameter(),
1871 Result);
1872 SubstTemplateTypeParmTypeLoc NewTL
1873 = TLB.push<SubstTemplateTypeParmTypeLoc>(Result);
1874 NewTL.setNameLoc(TL.getNameLoc());
1875 return Result;
1876}
1877
1878template<typename EntityPrinter>
1879static concepts::Requirement::SubstitutionDiagnostic *
1880createSubstDiag(Sema &S, TemplateDeductionInfo &Info, EntityPrinter Printer) {
1881 SmallString<128> Message;
1882 SourceLocation ErrorLoc;
1883 if (Info.hasSFINAEDiagnostic()) {
1884 PartialDiagnosticAt PDA(SourceLocation(),
1885 PartialDiagnostic::NullDiagnostic{});
1886 Info.takeSFINAEDiagnostic(PDA);
1887 PDA.second.EmitToString(S.getDiagnostics(), Message);
1888 ErrorLoc = PDA.first;
1889 } else {
1890 ErrorLoc = Info.getLocation();
1891 }
1892 char *MessageBuf = new (S.Context) char[Message.size()];
1893 std::copy(Message.begin(), Message.end(), MessageBuf);
1894 SmallString<128> Entity;
1895 llvm::raw_svector_ostream OS(Entity);
1896 Printer(OS);
1897 char *EntityBuf = new (S.Context) char[Entity.size()];
1898 std::copy(Entity.begin(), Entity.end(), EntityBuf);
1899 return new (S.Context) concepts::Requirement::SubstitutionDiagnostic{
1900 StringRef(EntityBuf, Entity.size()), ErrorLoc,
1901 StringRef(MessageBuf, Message.size())};
1902}
1903
1904concepts::TypeRequirement *
1905TemplateInstantiator::TransformTypeRequirement(concepts::TypeRequirement *Req) {
1906 if (!Req->isDependent() && !AlwaysRebuild())
1907 return Req;
1908 if (Req->isSubstitutionFailure()) {
1909 if (AlwaysRebuild())
1910 return RebuildTypeRequirement(
1911 Req->getSubstitutionDiagnostic());
1912 return Req;
1913 }
1914
1915 Sema::SFINAETrap Trap(SemaRef);
1916 TemplateDeductionInfo Info(Req->getType()->getTypeLoc().getBeginLoc());
1917 Sema::InstantiatingTemplate TypeInst(SemaRef,
1918 Req->getType()->getTypeLoc().getBeginLoc(), Req, Info,
1919 Req->getType()->getTypeLoc().getSourceRange());
1920 if (TypeInst.isInvalid())
1921 return nullptr;
1922 TypeSourceInfo *TransType = TransformType(Req->getType());
1923 if (!TransType || Trap.hasErrorOccurred())
1924 return RebuildTypeRequirement(createSubstDiag(SemaRef, Info,
1925 [&] (llvm::raw_ostream& OS) {
1926 Req->getType()->getType().print(OS, SemaRef.getPrintingPolicy());
1927 }));
1928 return RebuildTypeRequirement(TransType);
1929}
1930
1931concepts::ExprRequirement *
1932TemplateInstantiator::TransformExprRequirement(concepts::ExprRequirement *Req) {
1933 if (!Req->isDependent() && !AlwaysRebuild())
1934 return Req;
1935
1936 Sema::SFINAETrap Trap(SemaRef);
1937
1938 llvm::PointerUnion<Expr *, concepts::Requirement::SubstitutionDiagnostic *>
1939 TransExpr;
1940 if (Req->isExprSubstitutionFailure())
1941 TransExpr = Req->getExprSubstitutionDiagnostic();
1942 else {
1943 Expr *E = Req->getExpr();
1944 TemplateDeductionInfo Info(E->getBeginLoc());
1945 Sema::InstantiatingTemplate ExprInst(SemaRef, E->getBeginLoc(), Req, Info,
1946 E->getSourceRange());
1947 if (ExprInst.isInvalid())
1948 return nullptr;
1949 ExprResult TransExprRes = TransformExpr(E);
1950 if (TransExprRes.isInvalid() || Trap.hasErrorOccurred())
1951 TransExpr = createSubstDiag(SemaRef, Info, [&](llvm::raw_ostream &OS) {
1952 E->printPretty(OS, nullptr, SemaRef.getPrintingPolicy());
1953 });
1954 else
1955 TransExpr = TransExprRes.get();
1956 }
1957
1958 llvm::Optional<concepts::ExprRequirement::ReturnTypeRequirement> TransRetReq;
1959 const auto &RetReq = Req->getReturnTypeRequirement();
1960 if (RetReq.isEmpty())
1961 TransRetReq.emplace();
1962 else if (RetReq.isSubstitutionFailure())
1963 TransRetReq.emplace(RetReq.getSubstitutionDiagnostic());
1964 else if (RetReq.isTypeConstraint()) {
1965 TemplateParameterList *OrigTPL =
1966 RetReq.getTypeConstraintTemplateParameterList();
1967 TemplateDeductionInfo Info(OrigTPL->getTemplateLoc());
1968 Sema::InstantiatingTemplate TPLInst(SemaRef, OrigTPL->getTemplateLoc(),
1969 Req, Info, OrigTPL->getSourceRange());
1970 if (TPLInst.isInvalid())
1971 return nullptr;
1972 TemplateParameterList *TPL =
1973 TransformTemplateParameterList(OrigTPL);
1974 if (!TPL)
1975 TransRetReq.emplace(createSubstDiag(SemaRef, Info,
1976 [&] (llvm::raw_ostream& OS) {
1977 RetReq.getTypeConstraint()->getImmediatelyDeclaredConstraint()
1978 ->printPretty(OS, nullptr, SemaRef.getPrintingPolicy());
1979 }));
1980 else {
1981 TPLInst.Clear();
1982 TransRetReq.emplace(TPL);
1983 }
1984 }
1985 assert(TransRetReq.hasValue() &&(static_cast<void> (0))
1986 "All code paths leading here must set TransRetReq")(static_cast<void> (0));
1987 if (Expr *E = TransExpr.dyn_cast<Expr *>())
1988 return RebuildExprRequirement(E, Req->isSimple(), Req->getNoexceptLoc(),
1989 std::move(*TransRetReq));
1990 return RebuildExprRequirement(
1991 TransExpr.get<concepts::Requirement::SubstitutionDiagnostic *>(),
1992 Req->isSimple(), Req->getNoexceptLoc(), std::move(*TransRetReq));
1993}
1994
1995concepts::NestedRequirement *
1996TemplateInstantiator::TransformNestedRequirement(
1997 concepts::NestedRequirement *Req) {
1998 if (!Req->isDependent() && !AlwaysRebuild())
1999 return Req;
2000 if (Req->isSubstitutionFailure()) {
2001 if (AlwaysRebuild())
2002 return RebuildNestedRequirement(
2003 Req->getSubstitutionDiagnostic());
2004 return Req;
2005 }
2006 Sema::InstantiatingTemplate ReqInst(SemaRef,
2007 Req->getConstraintExpr()->getBeginLoc(), Req,
2008 Sema::InstantiatingTemplate::ConstraintsCheck{},
2009 Req->getConstraintExpr()->getSourceRange());
2010
2011 ExprResult TransConstraint;
2012 TemplateDeductionInfo Info(Req->getConstraintExpr()->getBeginLoc());
2013 {
2014 EnterExpressionEvaluationContext ContextRAII(
2015 SemaRef, Sema::ExpressionEvaluationContext::ConstantEvaluated);
2016 Sema::SFINAETrap Trap(SemaRef);
2017 Sema::InstantiatingTemplate ConstrInst(SemaRef,
2018 Req->getConstraintExpr()->getBeginLoc(), Req, Info,
2019 Req->getConstraintExpr()->getSourceRange());
2020 if (ConstrInst.isInvalid())
2021 return nullptr;
2022 TransConstraint = TransformExpr(Req->getConstraintExpr());
2023 if (TransConstraint.isInvalid() || Trap.hasErrorOccurred())
2024 return RebuildNestedRequirement(createSubstDiag(SemaRef, Info,
2025 [&] (llvm::raw_ostream& OS) {
2026 Req->getConstraintExpr()->printPretty(OS, nullptr,
2027 SemaRef.getPrintingPolicy());
2028 }));
2029 }
2030 return RebuildNestedRequirement(TransConstraint.get());
2031}
2032
2033
2034/// Perform substitution on the type T with a given set of template
2035/// arguments.
2036///
2037/// This routine substitutes the given template arguments into the
2038/// type T and produces the instantiated type.
2039///
2040/// \param T the type into which the template arguments will be
2041/// substituted. If this type is not dependent, it will be returned
2042/// immediately.
2043///
2044/// \param Args the template arguments that will be
2045/// substituted for the top-level template parameters within T.
2046///
2047/// \param Loc the location in the source code where this substitution
2048/// is being performed. It will typically be the location of the
2049/// declarator (if we're instantiating the type of some declaration)
2050/// or the location of the type in the source code (if, e.g., we're
2051/// instantiating the type of a cast expression).
2052///
2053/// \param Entity the name of the entity associated with a declaration
2054/// being instantiated (if any). May be empty to indicate that there
2055/// is no such entity (if, e.g., this is a type that occurs as part of
2056/// a cast expression) or that the entity has no name (e.g., an
2057/// unnamed function parameter).
2058///
2059/// \param AllowDeducedTST Whether a DeducedTemplateSpecializationType is
2060/// acceptable as the top level type of the result.
2061///
2062/// \returns If the instantiation succeeds, the instantiated
2063/// type. Otherwise, produces diagnostics and returns a NULL type.
2064TypeSourceInfo *Sema::SubstType(TypeSourceInfo *T,
2065 const MultiLevelTemplateArgumentList &Args,
2066 SourceLocation Loc,
2067 DeclarationName Entity,
2068 bool AllowDeducedTST) {
2069 assert(!CodeSynthesisContexts.empty() &&(static_cast<void> (0))
2070 "Cannot perform an instantiation without some context on the "(static_cast<void> (0))
2071 "instantiation stack")(static_cast<void> (0));
2072
2073 if (!T->getType()->isInstantiationDependentType() &&
2074 !T->getType()->isVariablyModifiedType())
2075 return T;
2076
2077 TemplateInstantiator Instantiator(*this, Args, Loc, Entity);
2078 return AllowDeducedTST ? Instantiator.TransformTypeWithDeducedTST(T)
2079 : Instantiator.TransformType(T);
2080}
2081
2082TypeSourceInfo *Sema::SubstType(TypeLoc TL,
2083 const MultiLevelTemplateArgumentList &Args,
2084 SourceLocation Loc,
2085 DeclarationName Entity) {
2086 assert(!CodeSynthesisContexts.empty() &&(static_cast<void> (0))
2087 "Cannot perform an instantiation without some context on the "(static_cast<void> (0))
2088 "instantiation stack")(static_cast<void> (0));
2089
2090 if (TL.getType().isNull())
2091 return nullptr;
2092
2093 if (!TL.getType()->isInstantiationDependentType() &&
2094 !TL.getType()->isVariablyModifiedType()) {
2095 // FIXME: Make a copy of the TypeLoc data here, so that we can
2096 // return a new TypeSourceInfo. Inefficient!
2097 TypeLocBuilder TLB;
2098 TLB.pushFullCopy(TL);
2099 return TLB.getTypeSourceInfo(Context, TL.getType());
2100 }
2101
2102 TemplateInstantiator Instantiator(*this, Args, Loc, Entity);
2103 TypeLocBuilder TLB;
2104 TLB.reserve(TL.getFullDataSize());
2105 QualType Result = Instantiator.TransformType(TLB, TL);
2106 if (Result.isNull())
2107 return nullptr;
2108
2109 return TLB.getTypeSourceInfo(Context, Result);
2110}
2111
2112/// Deprecated form of the above.
2113QualType Sema::SubstType(QualType T,
2114 const MultiLevelTemplateArgumentList &TemplateArgs,
2115 SourceLocation Loc, DeclarationName Entity) {
2116 assert(!CodeSynthesisContexts.empty() &&(static_cast<void> (0))
2117 "Cannot perform an instantiation without some context on the "(static_cast<void> (0))
2118 "instantiation stack")(static_cast<void> (0));
2119
2120 // If T is not a dependent type or a variably-modified type, there
2121 // is nothing to do.
2122 if (!T->isInstantiationDependentType() && !T->isVariablyModifiedType())
2123 return T;
2124
2125 TemplateInstantiator Instantiator(*this, TemplateArgs, Loc, Entity);
2126 return Instantiator.TransformType(T);
2127}
2128
2129static bool NeedsInstantiationAsFunctionType(TypeSourceInfo *T) {
2130 if (T->getType()->isInstantiationDependentType() ||
2131 T->getType()->isVariablyModifiedType())
2132 return true;
2133
2134 TypeLoc TL = T->getTypeLoc().IgnoreParens();
2135 if (!TL.getAs<FunctionProtoTypeLoc>())
2136 return false;
2137
2138 FunctionProtoTypeLoc FP = TL.castAs<FunctionProtoTypeLoc>();
2139 for (ParmVarDecl *P : FP.getParams()) {
2140 // This must be synthesized from a typedef.
2141 if (!P) continue;
2142
2143 // If there are any parameters, a new TypeSourceInfo that refers to the
2144 // instantiated parameters must be built.
2145 return true;
2146 }
2147
2148 return false;
2149}
2150
2151/// A form of SubstType intended specifically for instantiating the
2152/// type of a FunctionDecl. Its purpose is solely to force the
2153/// instantiation of default-argument expressions and to avoid
2154/// instantiating an exception-specification.
2155TypeSourceInfo *Sema::SubstFunctionDeclType(TypeSourceInfo *T,
2156 const MultiLevelTemplateArgumentList &Args,
2157 SourceLocation Loc,
2158 DeclarationName Entity,
2159 CXXRecordDecl *ThisContext,
2160 Qualifiers ThisTypeQuals) {
2161 assert(!CodeSynthesisContexts.empty() &&(static_cast<void> (0))
2162 "Cannot perform an instantiation without some context on the "(static_cast<void> (0))
2163 "instantiation stack")(static_cast<void> (0));
2164
2165 if (!NeedsInstantiationAsFunctionType(T))
2166 return T;
2167
2168 TemplateInstantiator Instantiator(*this, Args, Loc, Entity);
2169
2170 TypeLocBuilder TLB;
2171
2172 TypeLoc TL = T->getTypeLoc();
2173 TLB.reserve(TL.getFullDataSize());
2174
2175 QualType Result;
2176
2177 if (FunctionProtoTypeLoc Proto =
2178 TL.IgnoreParens().getAs<FunctionProtoTypeLoc>()) {
2179 // Instantiate the type, other than its exception specification. The
2180 // exception specification is instantiated in InitFunctionInstantiation
2181 // once we've built the FunctionDecl.
2182 // FIXME: Set the exception specification to EST_Uninstantiated here,
2183 // instead of rebuilding the function type again later.
2184 Result = Instantiator.TransformFunctionProtoType(
2185 TLB, Proto, ThisContext, ThisTypeQuals,
2186 [](FunctionProtoType::ExceptionSpecInfo &ESI,
2187 bool &Changed) { return false; });
2188 } else {
2189 Result = Instantiator.TransformType(TLB, TL);
2190 }
2191 if (Result.isNull())
2192 return nullptr;
2193
2194 return TLB.getTypeSourceInfo(Context, Result);
2195}
2196
2197bool Sema::SubstExceptionSpec(SourceLocation Loc,
2198 FunctionProtoType::ExceptionSpecInfo &ESI,
2199 SmallVectorImpl<QualType> &ExceptionStorage,
2200 const MultiLevelTemplateArgumentList &Args) {
2201 assert(ESI.Type != EST_Uninstantiated)(static_cast<void> (0));
2202
2203 bool Changed = false;
2204 TemplateInstantiator Instantiator(*this, Args, Loc, DeclarationName());
2205 return Instantiator.TransformExceptionSpec(Loc, ESI, ExceptionStorage,
2206 Changed);
2207}
2208
2209void Sema::SubstExceptionSpec(FunctionDecl *New, const FunctionProtoType *Proto,
2210 const MultiLevelTemplateArgumentList &Args) {
2211 FunctionProtoType::ExceptionSpecInfo ESI =
2212 Proto->getExtProtoInfo().ExceptionSpec;
2213
2214 SmallVector<QualType, 4> ExceptionStorage;
2215 if (SubstExceptionSpec(New->getTypeSourceInfo()->getTypeLoc().getEndLoc(),
2216 ESI, ExceptionStorage, Args))
2217 // On error, recover by dropping the exception specification.
2218 ESI.Type = EST_None;
2219
2220 UpdateExceptionSpec(New, ESI);
2221}
2222
2223namespace {
2224
2225 struct GetContainedInventedTypeParmVisitor :
2226 public TypeVisitor<GetContainedInventedTypeParmVisitor,
2227 TemplateTypeParmDecl *> {
2228 using TypeVisitor<GetContainedInventedTypeParmVisitor,
2229 TemplateTypeParmDecl *>::Visit;
2230
2231 TemplateTypeParmDecl *Visit(QualType T) {
2232 if (T.isNull())
2233 return nullptr;
2234 return Visit(T.getTypePtr());
2235 }
2236 // The deduced type itself.
2237 TemplateTypeParmDecl *VisitTemplateTypeParmType(
2238 const TemplateTypeParmType *T) {
2239 if (!T->getDecl() || !T->getDecl()->isImplicit())
2240 return nullptr;
2241 return T->getDecl();
2242 }
2243
2244 // Only these types can contain 'auto' types, and subsequently be replaced
2245 // by references to invented parameters.
2246
2247 TemplateTypeParmDecl *VisitElaboratedType(const ElaboratedType *T) {
2248 return Visit(T->getNamedType());
2249 }
2250
2251 TemplateTypeParmDecl *VisitPointerType(const PointerType *T) {
2252 return Visit(T->getPointeeType());
2253 }
2254
2255 TemplateTypeParmDecl *VisitBlockPointerType(const BlockPointerType *T) {
2256 return Visit(T->getPointeeType());
2257 }
2258
2259 TemplateTypeParmDecl *VisitReferenceType(const ReferenceType *T) {
2260 return Visit(T->getPointeeTypeAsWritten());
2261 }
2262
2263 TemplateTypeParmDecl *VisitMemberPointerType(const MemberPointerType *T) {
2264 return Visit(T->getPointeeType());
2265 }
2266
2267 TemplateTypeParmDecl *VisitArrayType(const ArrayType *T) {
2268 return Visit(T->getElementType());
2269 }
2270
2271 TemplateTypeParmDecl *VisitDependentSizedExtVectorType(
2272 const DependentSizedExtVectorType *T) {
2273 return Visit(T->getElementType());
2274 }
2275
2276 TemplateTypeParmDecl *VisitVectorType(const VectorType *T) {
2277 return Visit(T->getElementType());
2278 }
2279
2280 TemplateTypeParmDecl *VisitFunctionProtoType(const FunctionProtoType *T) {
2281 return VisitFunctionType(T);
2282 }
2283
2284 TemplateTypeParmDecl *VisitFunctionType(const FunctionType *T) {
2285 return Visit(T->getReturnType());
2286 }
2287
2288 TemplateTypeParmDecl *VisitParenType(const ParenType *T) {
2289 return Visit(T->getInnerType());
2290 }
2291
2292 TemplateTypeParmDecl *VisitAttributedType(const AttributedType *T) {
2293 return Visit(T->getModifiedType());
2294 }
2295
2296 TemplateTypeParmDecl *VisitMacroQualifiedType(const MacroQualifiedType *T) {
2297 return Visit(T->getUnderlyingType());
2298 }
2299
2300 TemplateTypeParmDecl *VisitAdjustedType(const AdjustedType *T) {
2301 return Visit(T->getOriginalType());
2302 }
2303
2304 TemplateTypeParmDecl *VisitPackExpansionType(const PackExpansionType *T) {
2305 return Visit(T->getPattern());
2306 }
2307 };
2308
2309} // namespace
2310
2311ParmVarDecl *Sema::SubstParmVarDecl(ParmVarDecl *OldParm,
2312 const MultiLevelTemplateArgumentList &TemplateArgs,
2313 int indexAdjustment,
2314 Optional<unsigned> NumExpansions,
2315 bool ExpectParameterPack) {
2316 TypeSourceInfo *OldDI = OldParm->getTypeSourceInfo();
2317 TypeSourceInfo *NewDI = nullptr;
2318
2319 TypeLoc OldTL = OldDI->getTypeLoc();
2320 if (PackExpansionTypeLoc ExpansionTL = OldTL.getAs<PackExpansionTypeLoc>()) {
2321
2322 // We have a function parameter pack. Substitute into the pattern of the
2323 // expansion.
2324 NewDI = SubstType(ExpansionTL.getPatternLoc(), TemplateArgs,
2325 OldParm->getLocation(), OldParm->getDeclName());
2326 if (!NewDI)
2327 return nullptr;
2328
2329 if (NewDI->getType()->containsUnexpandedParameterPack()) {
2330 // We still have unexpanded parameter packs, which means that
2331 // our function parameter is still a function parameter pack.
2332 // Therefore, make its type a pack expansion type.
2333 NewDI = CheckPackExpansion(NewDI, ExpansionTL.getEllipsisLoc(),
2334 NumExpansions);
2335 } else if (ExpectParameterPack) {
2336 // We expected to get a parameter pack but didn't (because the type
2337 // itself is not a pack expansion type), so complain. This can occur when
2338 // the substitution goes through an alias template that "loses" the
2339 // pack expansion.
2340 Diag(OldParm->getLocation(),
2341 diag::err_function_parameter_pack_without_parameter_packs)
2342 << NewDI->getType();
2343 return nullptr;
2344 }
2345 } else {
2346 NewDI = SubstType(OldDI, TemplateArgs, OldParm->getLocation(),
2347 OldParm->getDeclName());
2348 }
2349
2350 if (!NewDI)
2351 return nullptr;
2352
2353 if (NewDI->getType()->isVoidType()) {
2354 Diag(OldParm->getLocation(), diag::err_param_with_void_type);
2355 return nullptr;
2356 }
2357
2358 // In abbreviated templates, TemplateTypeParmDecls with possible
2359 // TypeConstraints are created when the parameter list is originally parsed.
2360 // The TypeConstraints can therefore reference other functions parameters in
2361 // the abbreviated function template, which is why we must instantiate them
2362 // here, when the instantiated versions of those referenced parameters are in
2363 // scope.
2364 if (TemplateTypeParmDecl *TTP =
2365 GetContainedInventedTypeParmVisitor().Visit(OldDI->getType())) {
2366 if (const TypeConstraint *TC = TTP->getTypeConstraint()) {
2367 auto *Inst = cast_or_null<TemplateTypeParmDecl>(
2368 FindInstantiatedDecl(TTP->getLocation(), TTP, TemplateArgs));
2369 // We will first get here when instantiating the abbreviated function
2370 // template's described function, but we might also get here later.
2371 // Make sure we do not instantiate the TypeConstraint more than once.
2372 if (Inst && !Inst->getTypeConstraint()) {
2373 // TODO: Concepts: do not instantiate the constraint (delayed constraint
2374 // substitution)
2375 const ASTTemplateArgumentListInfo *TemplArgInfo
2376 = TC->getTemplateArgsAsWritten();
2377 TemplateArgumentListInfo InstArgs;
2378
2379 if (TemplArgInfo) {
2380 InstArgs.setLAngleLoc(TemplArgInfo->LAngleLoc);
2381 InstArgs.setRAngleLoc(TemplArgInfo->RAngleLoc);
2382 if (Subst(TemplArgInfo->getTemplateArgs(),
2383 TemplArgInfo->NumTemplateArgs, InstArgs, TemplateArgs))
2384 return nullptr;
2385 }
2386 if (AttachTypeConstraint(
2387 TC->getNestedNameSpecifierLoc(), TC->getConceptNameInfo(),
2388 TC->getNamedConcept(), TemplArgInfo ? &InstArgs : nullptr, Inst,
2389 TTP->isParameterPack()
2390 ? cast<CXXFoldExpr>(TC->getImmediatelyDeclaredConstraint())
2391 ->getEllipsisLoc()
2392 : SourceLocation()))
2393 return nullptr;
2394 }
2395 }
2396 }
2397
2398 ParmVarDecl *NewParm = CheckParameter(Context.getTranslationUnitDecl(),
2399 OldParm->getInnerLocStart(),
2400 OldParm->getLocation(),
2401 OldParm->getIdentifier(),
2402 NewDI->getType(), NewDI,
2403 OldParm->getStorageClass());
2404 if (!NewParm)
2405 return nullptr;
2406
2407 // Mark the (new) default argument as uninstantiated (if any).
2408 if (OldParm->hasUninstantiatedDefaultArg()) {
2409 Expr *Arg = OldParm->getUninstantiatedDefaultArg();
2410 NewParm->setUninstantiatedDefaultArg(Arg);
2411 } else if (OldParm->hasUnparsedDefaultArg()) {
2412 NewParm->setUnparsedDefaultArg();
2413 UnparsedDefaultArgInstantiations[OldParm].push_back(NewParm);
2414 } else if (Expr *Arg = OldParm->getDefaultArg()) {
2415 FunctionDecl *OwningFunc = cast<FunctionDecl>(OldParm->getDeclContext());
2416 if (OwningFunc->isInLocalScopeForInstantiation()) {
2417 // Instantiate default arguments for methods of local classes (DR1484)
2418 // and non-defining declarations.
2419 Sema::ContextRAII SavedContext(*this, OwningFunc);
2420 LocalInstantiationScope Local(*this, true);
2421 ExprResult NewArg = SubstExpr(Arg, TemplateArgs);
2422 if (NewArg.isUsable()) {
2423 // It would be nice if we still had this.
2424 SourceLocation EqualLoc = NewArg.get()->getBeginLoc();
2425 ExprResult Result =
2426 ConvertParamDefaultArgument(NewParm, NewArg.get(), EqualLoc);
2427 if (Result.isInvalid())
2428 return nullptr;
2429
2430 SetParamDefaultArgument(NewParm, Result.getAs<Expr>(), EqualLoc);
2431 }
2432 } else {
2433 // FIXME: if we non-lazily instantiated non-dependent default args for
2434 // non-dependent parameter types we could remove a bunch of duplicate
2435 // conversion warnings for such arguments.
2436 NewParm->setUninstantiatedDefaultArg(Arg);
2437 }
2438 }
2439
2440 NewParm->setHasInheritedDefaultArg(OldParm->hasInheritedDefaultArg());
2441
2442 if (OldParm->isParameterPack() && !NewParm->isParameterPack()) {
2443 // Add the new parameter to the instantiated parameter pack.
2444 CurrentInstantiationScope->InstantiatedLocalPackArg(OldParm, NewParm);
2445 } else {
2446 // Introduce an Old -> New mapping
2447 CurrentInstantiationScope->InstantiatedLocal(OldParm, NewParm);
2448 }
2449
2450 // FIXME: OldParm may come from a FunctionProtoType, in which case CurContext
2451 // can be anything, is this right ?
2452 NewParm->setDeclContext(CurContext);
2453
2454 NewParm->setScopeInfo(OldParm->getFunctionScopeDepth(),
2455 OldParm->getFunctionScopeIndex() + indexAdjustment);
2456
2457 InstantiateAttrs(TemplateArgs, OldParm, NewParm);
2458
2459 return NewParm;
2460}
2461
2462/// Substitute the given template arguments into the given set of
2463/// parameters, producing the set of parameter types that would be generated
2464/// from such a substitution.
2465bool Sema::SubstParmTypes(
2466 SourceLocation Loc, ArrayRef<ParmVarDecl *> Params,
2467 const FunctionProtoType::ExtParameterInfo *ExtParamInfos,
2468 const MultiLevelTemplateArgumentList &TemplateArgs,
2469 SmallVectorImpl<QualType> &ParamTypes,
2470 SmallVectorImpl<ParmVarDecl *> *OutParams,
2471 ExtParameterInfoBuilder &ParamInfos) {
2472 assert(!CodeSynthesisContexts.empty() &&(static_cast<void> (0))
2473 "Cannot perform an instantiation without some context on the "(static_cast<void> (0))
2474 "instantiation stack")(static_cast<void> (0));
2475
2476 TemplateInstantiator Instantiator(*this, TemplateArgs, Loc,
2477 DeclarationName());
2478 return Instantiator.TransformFunctionTypeParams(
2
Calling 'TreeTransform::TransformFunctionTypeParams'
2479 Loc, Params, nullptr, ExtParamInfos, ParamTypes, OutParams, ParamInfos);
1
Passing null pointer value via 3rd parameter 'ParamTypes'
2480}
2481
2482/// Perform substitution on the base class specifiers of the
2483/// given class template specialization.
2484///
2485/// Produces a diagnostic and returns true on error, returns false and
2486/// attaches the instantiated base classes to the class template
2487/// specialization if successful.
2488bool
2489Sema::SubstBaseSpecifiers(CXXRecordDecl *Instantiation,
2490 CXXRecordDecl *Pattern,
2491 const MultiLevelTemplateArgumentList &TemplateArgs) {
2492 bool Invalid = false;
2493 SmallVector<CXXBaseSpecifier*, 4> InstantiatedBases;
2494 for (const auto &Base : Pattern->bases()) {
2495 if (!Base.getType()->isDependentType()) {
2496 if (const CXXRecordDecl *RD = Base.getType()->getAsCXXRecordDecl()) {
2497 if (RD->isInvalidDecl())
2498 Instantiation->setInvalidDecl();
2499 }
2500 InstantiatedBases.push_back(new (Context) CXXBaseSpecifier(Base));
2501 continue;
2502 }
2503
2504 SourceLocation EllipsisLoc;
2505 TypeSourceInfo *BaseTypeLoc;
2506 if (Base.isPackExpansion()) {
2507 // This is a pack expansion. See whether we should expand it now, or
2508 // wait until later.
2509 SmallVector<UnexpandedParameterPack, 2> Unexpanded;
2510 collectUnexpandedParameterPacks(Base.getTypeSourceInfo()->getTypeLoc(),
2511 Unexpanded);
2512 bool ShouldExpand = false;
2513 bool RetainExpansion = false;
2514 Optional<unsigned> NumExpansions;
2515 if (CheckParameterPacksForExpansion(Base.getEllipsisLoc(),
2516 Base.getSourceRange(),
2517 Unexpanded,
2518 TemplateArgs, ShouldExpand,
2519 RetainExpansion,
2520 NumExpansions)) {
2521 Invalid = true;
2522 continue;
2523 }
2524
2525 // If we should expand this pack expansion now, do so.
2526 if (ShouldExpand) {
2527 for (unsigned I = 0; I != *NumExpansions; ++I) {
2528 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(*this, I);
2529
2530 TypeSourceInfo *BaseTypeLoc = SubstType(Base.getTypeSourceInfo(),
2531 TemplateArgs,
2532 Base.getSourceRange().getBegin(),
2533 DeclarationName());
2534 if (!BaseTypeLoc) {
2535 Invalid = true;
2536 continue;
2537 }
2538
2539 if (CXXBaseSpecifier *InstantiatedBase
2540 = CheckBaseSpecifier(Instantiation,
2541 Base.getSourceRange(),
2542 Base.isVirtual(),
2543 Base.getAccessSpecifierAsWritten(),
2544 BaseTypeLoc,
2545 SourceLocation()))
2546 InstantiatedBases.push_back(InstantiatedBase);
2547 else
2548 Invalid = true;
2549 }
2550
2551 continue;
2552 }
2553
2554 // The resulting base specifier will (still) be a pack expansion.
2555 EllipsisLoc = Base.getEllipsisLoc();
2556 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(*this, -1);
2557 BaseTypeLoc = SubstType(Base.getTypeSourceInfo(),
2558 TemplateArgs,
2559 Base.getSourceRange().getBegin(),
2560 DeclarationName());
2561 } else {
2562 BaseTypeLoc = SubstType(Base.getTypeSourceInfo(),
2563 TemplateArgs,
2564 Base.getSourceRange().getBegin(),
2565 DeclarationName());
2566 }
2567
2568 if (!BaseTypeLoc) {
2569 Invalid = true;
2570 continue;
2571 }
2572
2573 if (CXXBaseSpecifier *InstantiatedBase
2574 = CheckBaseSpecifier(Instantiation,
2575 Base.getSourceRange(),
2576 Base.isVirtual(),
2577 Base.getAccessSpecifierAsWritten(),
2578 BaseTypeLoc,
2579 EllipsisLoc))
2580 InstantiatedBases.push_back(InstantiatedBase);
2581 else
2582 Invalid = true;
2583 }
2584
2585 if (!Invalid && AttachBaseSpecifiers(Instantiation, InstantiatedBases))
2586 Invalid = true;
2587
2588 return Invalid;
2589}
2590
2591// Defined via #include from SemaTemplateInstantiateDecl.cpp
2592namespace clang {
2593 namespace sema {
2594 Attr *instantiateTemplateAttribute(const Attr *At, ASTContext &C, Sema &S,
2595 const MultiLevelTemplateArgumentList &TemplateArgs);
2596 Attr *instantiateTemplateAttributeForDecl(
2597 const Attr *At, ASTContext &C, Sema &S,
2598 const MultiLevelTemplateArgumentList &TemplateArgs);
2599 }
2600}
2601
2602/// Instantiate the definition of a class from a given pattern.
2603///
2604/// \param PointOfInstantiation The point of instantiation within the
2605/// source code.
2606///
2607/// \param Instantiation is the declaration whose definition is being
2608/// instantiated. This will be either a class template specialization
2609/// or a member class of a class template specialization.
2610///
2611/// \param Pattern is the pattern from which the instantiation
2612/// occurs. This will be either the declaration of a class template or
2613/// the declaration of a member class of a class template.
2614///
2615/// \param TemplateArgs The template arguments to be substituted into
2616/// the pattern.
2617///
2618/// \param TSK the kind of implicit or explicit instantiation to perform.
2619///
2620/// \param Complain whether to complain if the class cannot be instantiated due
2621/// to the lack of a definition.
2622///
2623/// \returns true if an error occurred, false otherwise.
2624bool
2625Sema::InstantiateClass(SourceLocation PointOfInstantiation,
2626 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern,
2627 const MultiLevelTemplateArgumentList &TemplateArgs,
2628 TemplateSpecializationKind TSK,
2629 bool Complain) {
2630 CXXRecordDecl *PatternDef
2631 = cast_or_null<CXXRecordDecl>(Pattern->getDefinition());
2632 if (DiagnoseUninstantiableTemplate(PointOfInstantiation, Instantiation,
2633 Instantiation->getInstantiatedFromMemberClass(),
2634 Pattern, PatternDef, TSK, Complain))
2635 return true;
2636
2637 llvm::TimeTraceScope TimeScope("InstantiateClass", [&]() {
2638 std::string Name;
2639 llvm::raw_string_ostream OS(Name);
2640 Instantiation->getNameForDiagnostic(OS, getPrintingPolicy(),
2641 /*Qualified=*/true);
2642 return Name;
2643 });
2644
2645 Pattern = PatternDef;
2646
2647 // Record the point of instantiation.
2648 if (MemberSpecializationInfo *MSInfo
2649 = Instantiation->getMemberSpecializationInfo()) {
2650 MSInfo->setTemplateSpecializationKind(TSK);
2651 MSInfo->setPointOfInstantiation(PointOfInstantiation);
2652 } else if (ClassTemplateSpecializationDecl *Spec
2653 = dyn_cast<ClassTemplateSpecializationDecl>(Instantiation)) {
2654 Spec->setTemplateSpecializationKind(TSK);
2655 Spec->setPointOfInstantiation(PointOfInstantiation);
2656 }
2657
2658 InstantiatingTemplate Inst(*this, PointOfInstantiation, Instantiation);
2659 if (Inst.isInvalid())
2660 return true;
2661 assert(!Inst.isAlreadyInstantiating() && "should have been caught by caller")(static_cast<void> (0));
2662 PrettyDeclStackTraceEntry CrashInfo(Context, Instantiation, SourceLocation(),
2663 "instantiating class definition");
2664
2665 // Enter the scope of this instantiation. We don't use
2666 // PushDeclContext because we don't have a scope.
2667 ContextRAII SavedContext(*this, Instantiation);
2668 EnterExpressionEvaluationContext EvalContext(
2669 *this, Sema::ExpressionEvaluationContext::PotentiallyEvaluated);
2670
2671 // If this is an instantiation of a local class, merge this local
2672 // instantiation scope with the enclosing scope. Otherwise, every
2673 // instantiation of a class has its own local instantiation scope.
2674 bool MergeWithParentScope = !Instantiation->isDefinedOutsideFunctionOrMethod();
2675 LocalInstantiationScope Scope(*this, MergeWithParentScope);
2676
2677 // Some class state isn't processed immediately but delayed till class
2678 // instantiation completes. We may not be ready to handle any delayed state
2679 // already on the stack as it might correspond to a different class, so save
2680 // it now and put it back later.
2681 SavePendingParsedClassStateRAII SavedPendingParsedClassState(*this);
2682
2683 // Pull attributes from the pattern onto the instantiation.
2684 InstantiateAttrs(TemplateArgs, Pattern, Instantiation);
2685
2686 // Start the definition of this instantiation.
2687 Instantiation->startDefinition();
2688
2689 // The instantiation is visible here, even if it was first declared in an
2690 // unimported module.
2691 Instantiation->setVisibleDespiteOwningModule();
2692
2693 // FIXME: This loses the as-written tag kind for an explicit instantiation.
2694 Instantiation->setTagKind(Pattern->getTagKind());
2695
2696 // Do substitution on the base class specifiers.
2697 if (SubstBaseSpecifiers(Instantiation, Pattern, TemplateArgs))
2698 Instantiation->setInvalidDecl();
2699
2700 TemplateDeclInstantiator Instantiator(*this, Instantiation, TemplateArgs);
2701 SmallVector<Decl*, 4> Fields;
2702 // Delay instantiation of late parsed attributes.
2703 LateInstantiatedAttrVec LateAttrs;
2704 Instantiator.enableLateAttributeInstantiation(&LateAttrs);
2705
2706 bool MightHaveConstexprVirtualFunctions = false;
2707 for (auto *Member : Pattern->decls()) {
2708 // Don't instantiate members not belonging in this semantic context.
2709 // e.g. for:
2710 // @code
2711 // template <int i> class A {
2712 // class B *g;
2713 // };
2714 // @endcode
2715 // 'class B' has the template as lexical context but semantically it is
2716 // introduced in namespace scope.
2717 if (Member->getDeclContext() != Pattern)
2718 continue;
2719
2720 // BlockDecls can appear in a default-member-initializer. They must be the
2721 // child of a BlockExpr, so we only know how to instantiate them from there.
2722 // Similarly, lambda closure types are recreated when instantiating the
2723 // corresponding LambdaExpr.
2724 if (isa<BlockDecl>(Member) ||
2725 (isa<CXXRecordDecl>(Member) && cast<CXXRecordDecl>(Member)->isLambda()))
2726 continue;
2727
2728 if (Member->isInvalidDecl()) {
2729 Instantiation->setInvalidDecl();
2730 continue;
2731 }
2732
2733 Decl *NewMember = Instantiator.Visit(Member);
2734 if (NewMember) {
2735 if (FieldDecl *Field = dyn_cast<FieldDecl>(NewMember)) {
2736 Fields.push_back(Field);
2737 } else if (EnumDecl *Enum = dyn_cast<EnumDecl>(NewMember)) {
2738 // C++11 [temp.inst]p1: The implicit instantiation of a class template
2739 // specialization causes the implicit instantiation of the definitions
2740 // of unscoped member enumerations.
2741 // Record a point of instantiation for this implicit instantiation.
2742 if (TSK == TSK_ImplicitInstantiation && !Enum->isScoped() &&
2743 Enum->isCompleteDefinition()) {
2744 MemberSpecializationInfo *MSInfo =Enum->getMemberSpecializationInfo();
2745 assert(MSInfo && "no spec info for member enum specialization")(static_cast<void> (0));
2746 MSInfo->setTemplateSpecializationKind(TSK_ImplicitInstantiation);
2747 MSInfo->setPointOfInstantiation(PointOfInstantiation);
2748 }
2749 } else if (StaticAssertDecl *SA = dyn_cast<StaticAssertDecl>(NewMember)) {
2750 if (SA->isFailed()) {
2751 // A static_assert failed. Bail out; instantiating this
2752 // class is probably not meaningful.
2753 Instantiation->setInvalidDecl();
2754 break;
2755 }
2756 } else if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(NewMember)) {
2757 if (MD->isConstexpr() && !MD->getFriendObjectKind() &&
2758 (MD->isVirtualAsWritten() || Instantiation->getNumBases()))
2759 MightHaveConstexprVirtualFunctions = true;
2760 }
2761
2762 if (NewMember->isInvalidDecl())
2763 Instantiation->setInvalidDecl();
2764 } else {
2765 // FIXME: Eventually, a NULL return will mean that one of the
2766 // instantiations was a semantic disaster, and we'll want to mark the
2767 // declaration invalid.
2768 // For now, we expect to skip some members that we can't yet handle.
2769 }
2770 }
2771
2772 // Finish checking fields.
2773 ActOnFields(nullptr, Instantiation->getLocation(), Instantiation, Fields,
2774 SourceLocation(), SourceLocation(), ParsedAttributesView());
2775 CheckCompletedCXXClass(nullptr, Instantiation);
2776
2777 // Default arguments are parsed, if not instantiated. We can go instantiate
2778 // default arg exprs for default constructors if necessary now. Unless we're
2779 // parsing a class, in which case wait until that's finished.
2780 if (ParsingClassDepth == 0)
2781 ActOnFinishCXXNonNestedClass();
2782
2783 // Instantiate late parsed attributes, and attach them to their decls.
2784 // See Sema::InstantiateAttrs
2785 for (LateInstantiatedAttrVec::iterator I = LateAttrs.begin(),
2786 E = LateAttrs.end(); I != E; ++I) {
2787 assert(CurrentInstantiationScope == Instantiator.getStartingScope())(static_cast<void> (0));
2788 CurrentInstantiationScope = I->Scope;
2789
2790 // Allow 'this' within late-parsed attributes.
2791 NamedDecl *ND = dyn_cast<NamedDecl>(I->NewDecl);
2792 CXXRecordDecl *ThisContext =
2793 dyn_cast_or_null<CXXRecordDecl>(ND->getDeclContext());
2794 CXXThisScopeRAII ThisScope(*this, ThisContext, Qualifiers(),
2795 ND && ND->isCXXInstanceMember());
2796
2797 Attr *NewAttr =
2798 instantiateTemplateAttribute(I->TmplAttr, Context, *this, TemplateArgs);
2799 if (NewAttr)
2800 I->NewDecl->addAttr(NewAttr);
2801 LocalInstantiationScope::deleteScopes(I->Scope,
2802 Instantiator.getStartingScope());
2803 }
2804 Instantiator.disableLateAttributeInstantiation();
2805 LateAttrs.clear();
2806
2807 ActOnFinishDelayedMemberInitializers(Instantiation);
2808
2809 // FIXME: We should do something similar for explicit instantiations so they
2810 // end up in the right module.
2811 if (TSK == TSK_ImplicitInstantiation) {
2812 Instantiation->setLocation(Pattern->getLocation());
2813 Instantiation->setLocStart(Pattern->getInnerLocStart());
2814 Instantiation->setBraceRange(Pattern->getBraceRange());
2815 }
2816
2817 if (!Instantiation->isInvalidDecl()) {
2818 // Perform any dependent diagnostics from the pattern.
2819 if (Pattern->isDependentContext())
2820 PerformDependentDiagnostics(Pattern, TemplateArgs);
2821
2822 // Instantiate any out-of-line class template partial
2823 // specializations now.
2824 for (TemplateDeclInstantiator::delayed_partial_spec_iterator
2825 P = Instantiator.delayed_partial_spec_begin(),
2826 PEnd = Instantiator.delayed_partial_spec_end();
2827 P != PEnd; ++P) {
2828 if (!Instantiator.InstantiateClassTemplatePartialSpecialization(
2829 P->first, P->second)) {
2830 Instantiation->setInvalidDecl();
2831 break;
2832 }
2833 }
2834
2835 // Instantiate any out-of-line variable template partial
2836 // specializations now.
2837 for (TemplateDeclInstantiator::delayed_var_partial_spec_iterator
2838 P = Instantiator.delayed_var_partial_spec_begin(),
2839 PEnd = Instantiator.delayed_var_partial_spec_end();
2840 P != PEnd; ++P) {
2841 if (!Instantiator.InstantiateVarTemplatePartialSpecialization(
2842 P->first, P->second)) {
2843 Instantiation->setInvalidDecl();
2844 break;
2845 }
2846 }
2847 }
2848
2849 // Exit the scope of this instantiation.
2850 SavedContext.pop();
2851
2852 if (!Instantiation->isInvalidDecl()) {
2853 // Always emit the vtable for an explicit instantiation definition
2854 // of a polymorphic class template specialization. Otherwise, eagerly
2855 // instantiate only constexpr virtual functions in preparation for their use
2856 // in constant evaluation.
2857 if (TSK == TSK_ExplicitInstantiationDefinition)
2858 MarkVTableUsed(PointOfInstantiation, Instantiation, true);
2859 else if (MightHaveConstexprVirtualFunctions)
2860 MarkVirtualMembersReferenced(PointOfInstantiation, Instantiation,
2861 /*ConstexprOnly*/ true);
2862 }
2863
2864 Consumer.HandleTagDeclDefinition(Instantiation);
2865
2866 return Instantiation->isInvalidDecl();
2867}
2868
2869/// Instantiate the definition of an enum from a given pattern.
2870///
2871/// \param PointOfInstantiation The point of instantiation within the
2872/// source code.
2873/// \param Instantiation is the declaration whose definition is being
2874/// instantiated. This will be a member enumeration of a class
2875/// temploid specialization, or a local enumeration within a
2876/// function temploid specialization.
2877/// \param Pattern The templated declaration from which the instantiation
2878/// occurs.
2879/// \param TemplateArgs The template arguments to be substituted into
2880/// the pattern.
2881/// \param TSK The kind of implicit or explicit instantiation to perform.
2882///
2883/// \return \c true if an error occurred, \c false otherwise.
2884bool Sema::InstantiateEnum(SourceLocation PointOfInstantiation,
2885 EnumDecl *Instantiation, EnumDecl *Pattern,
2886 const MultiLevelTemplateArgumentList &TemplateArgs,
2887 TemplateSpecializationKind TSK) {
2888 EnumDecl *PatternDef = Pattern->getDefinition();
2889 if (DiagnoseUninstantiableTemplate(PointOfInstantiation, Instantiation,
2890 Instantiation->getInstantiatedFromMemberEnum(),
2891 Pattern, PatternDef, TSK,/*Complain*/true))
2892 return true;
2893 Pattern = PatternDef;
2894
2895 // Record the point of instantiation.
2896 if (MemberSpecializationInfo *MSInfo
2897 = Instantiation->getMemberSpecializationInfo()) {
2898 MSInfo->setTemplateSpecializationKind(TSK);
2899 MSInfo->setPointOfInstantiation(PointOfInstantiation);
2900 }
2901
2902 InstantiatingTemplate Inst(*this, PointOfInstantiation, Instantiation);
2903 if (Inst.isInvalid())
2904 return true;
2905 if (Inst.isAlreadyInstantiating())
2906 return false;
2907 PrettyDeclStackTraceEntry CrashInfo(Context, Instantiation, SourceLocation(),
2908 "instantiating enum definition");
2909
2910 // The instantiation is visible here, even if it was first declared in an
2911 // unimported module.
2912 Instantiation->setVisibleDespiteOwningModule();
2913
2914 // Enter the scope of this instantiation. We don't use
2915 // PushDeclContext because we don't have a scope.
2916 ContextRAII SavedContext(*this, Instantiation);
2917 EnterExpressionEvaluationContext EvalContext(
2918 *this, Sema::ExpressionEvaluationContext::PotentiallyEvaluated);
2919
2920 LocalInstantiationScope Scope(*this, /*MergeWithParentScope*/true);
2921
2922 // Pull attributes from the pattern onto the instantiation.
2923 InstantiateAttrs(TemplateArgs, Pattern, Instantiation);
2924
2925 TemplateDeclInstantiator Instantiator(*this, Instantiation, TemplateArgs);
2926 Instantiator.InstantiateEnumDefinition(Instantiation, Pattern);
2927
2928 // Exit the scope of this instantiation.
2929 SavedContext.pop();
2930
2931 return Instantiation->isInvalidDecl();
2932}
2933
2934
2935/// Instantiate the definition of a field from the given pattern.
2936///
2937/// \param PointOfInstantiation The point of instantiation within the
2938/// source code.
2939/// \param Instantiation is the declaration whose definition is being
2940/// instantiated. This will be a class of a class temploid
2941/// specialization, or a local enumeration within a function temploid
2942/// specialization.
2943/// \param Pattern The templated declaration from which the instantiation
2944/// occurs.
2945/// \param TemplateArgs The template arguments to be substituted into
2946/// the pattern.
2947///
2948/// \return \c true if an error occurred, \c false otherwise.
2949bool Sema::InstantiateInClassInitializer(
2950 SourceLocation PointOfInstantiation, FieldDecl *Instantiation,
2951 FieldDecl *Pattern, const MultiLevelTemplateArgumentList &TemplateArgs) {
2952 // If there is no initializer, we don't need to do anything.
2953 if (!Pattern->hasInClassInitializer())
2954 return false;
2955
2956 assert(Instantiation->getInClassInitStyle() ==(static_cast<void> (0))
2957 Pattern->getInClassInitStyle() &&(static_cast<void> (0))
2958 "pattern and instantiation disagree about init style")(static_cast<void> (0));
2959
2960 // Error out if we haven't parsed the initializer of the pattern yet because
2961 // we are waiting for the closing brace of the outer class.
2962 Expr *OldInit = Pattern->getInClassInitializer();
2963 if (!OldInit) {
2964 RecordDecl *PatternRD = Pattern->getParent();
2965 RecordDecl *OutermostClass = PatternRD->getOuterLexicalRecordContext();
2966 Diag(PointOfInstantiation,
2967 diag::err_default_member_initializer_not_yet_parsed)
2968 << OutermostClass << Pattern;
2969 Diag(Pattern->getEndLoc(),
2970 diag::note_default_member_initializer_not_yet_parsed);
2971 Instantiation->setInvalidDecl();
2972 return true;
2973 }
2974
2975 InstantiatingTemplate Inst(*this, PointOfInstantiation, Instantiation);
2976 if (Inst.isInvalid())
2977 return true;
2978 if (Inst.isAlreadyInstantiating()) {
2979 // Error out if we hit an instantiation cycle for this initializer.
2980 Diag(PointOfInstantiation, diag::err_default_member_initializer_cycle)
2981 << Instantiation;
2982 return true;
2983 }
2984 PrettyDeclStackTraceEntry CrashInfo(Context, Instantiation, SourceLocation(),
2985 "instantiating default member init");
2986
2987 // Enter the scope of this instantiation. We don't use PushDeclContext because
2988 // we don't have a scope.
2989 ContextRAII SavedContext(*this, Instantiation->getParent());
2990 EnterExpressionEvaluationContext EvalContext(
2991 *this, Sema::ExpressionEvaluationContext::PotentiallyEvaluated);
2992
2993 LocalInstantiationScope Scope(*this, true);
2994
2995 // Instantiate the initializer.
2996 ActOnStartCXXInClassMemberInitializer();
2997 CXXThisScopeRAII ThisScope(*this, Instantiation->getParent(), Qualifiers());
2998
2999 ExprResult NewInit = SubstInitializer(OldInit, TemplateArgs,
3000 /*CXXDirectInit=*/false);
3001 Expr *Init = NewInit.get();
3002 assert((!Init || !isa<ParenListExpr>(Init)) && "call-style init in class")(static_cast<void> (0));
3003 ActOnFinishCXXInClassMemberInitializer(
3004 Instantiation, Init ? Init->getBeginLoc() : SourceLocation(), Init);
3005
3006 if (auto *L = getASTMutationListener())
3007 L->DefaultMemberInitializerInstantiated(Instantiation);
3008
3009 // Return true if the in-class initializer is still missing.
3010 return !Instantiation->getInClassInitializer();
3011}
3012
3013namespace {
3014 /// A partial specialization whose template arguments have matched
3015 /// a given template-id.
3016 struct PartialSpecMatchResult {
3017 ClassTemplatePartialSpecializationDecl *Partial;
3018 TemplateArgumentList *Args;
3019 };
3020}
3021
3022bool Sema::usesPartialOrExplicitSpecialization(
3023 SourceLocation Loc, ClassTemplateSpecializationDecl *ClassTemplateSpec) {
3024 if (ClassTemplateSpec->getTemplateSpecializationKind() ==
3025 TSK_ExplicitSpecialization)
3026 return true;
3027
3028 SmallVector<ClassTemplatePartialSpecializationDecl *, 4> PartialSpecs;
3029 ClassTemplateSpec->getSpecializedTemplate()
3030 ->getPartialSpecializations(PartialSpecs);
3031 for (unsigned I = 0, N = PartialSpecs.size(); I != N; ++I) {
3032 TemplateDeductionInfo Info(Loc);
3033 if (!DeduceTemplateArguments(PartialSpecs[I],
3034 ClassTemplateSpec->getTemplateArgs(), Info))
3035 return true;
3036 }
3037
3038 return false;
3039}
3040
3041/// Get the instantiation pattern to use to instantiate the definition of a
3042/// given ClassTemplateSpecializationDecl (either the pattern of the primary
3043/// template or of a partial specialization).
3044static ActionResult<CXXRecordDecl *>
3045getPatternForClassTemplateSpecialization(
3046 Sema &S, SourceLocation PointOfInstantiation,
3047 ClassTemplateSpecializationDecl *ClassTemplateSpec,
3048 TemplateSpecializationKind TSK) {
3049 Sema::InstantiatingTemplate Inst(S, PointOfInstantiation, ClassTemplateSpec);
3050 if (Inst.isInvalid())
3051 return {/*Invalid=*/true};
3052 if (Inst.isAlreadyInstantiating())
3053 return {/*Invalid=*/false};
3054
3055 llvm::PointerUnion<ClassTemplateDecl *,
3056 ClassTemplatePartialSpecializationDecl *>
3057 Specialized = ClassTemplateSpec->getSpecializedTemplateOrPartial();
3058 if (!Specialized.is<ClassTemplatePartialSpecializationDecl *>()) {
3059 // Find best matching specialization.
3060 ClassTemplateDecl *Template = ClassTemplateSpec->getSpecializedTemplate();
3061
3062 // C++ [temp.class.spec.match]p1:
3063 // When a class template is used in a context that requires an
3064 // instantiation of the class, it is necessary to determine
3065 // whether the instantiation is to be generated using the primary
3066 // template or one of the partial specializations. This is done by
3067 // matching the template arguments of the class template
3068 // specialization with the template argument lists of the partial
3069 // specializations.
3070 typedef PartialSpecMatchResult MatchResult;
3071 SmallVector<MatchResult, 4> Matched;
3072 SmallVector<ClassTemplatePartialSpecializationDecl *, 4> PartialSpecs;
3073 Template->getPartialSpecializations(PartialSpecs);
3074 TemplateSpecCandidateSet FailedCandidates(PointOfInstantiation);
3075 for (unsigned I = 0, N = PartialSpecs.size(); I != N; ++I) {
3076 ClassTemplatePartialSpecializationDecl *Partial = PartialSpecs[I];
3077 TemplateDeductionInfo Info(FailedCandidates.getLocation());
3078 if (Sema::TemplateDeductionResult Result = S.DeduceTemplateArguments(
3079 Partial, ClassTemplateSpec->getTemplateArgs(), Info)) {
3080 // Store the failed-deduction information for use in diagnostics, later.
3081 // TODO: Actually use the failed-deduction info?
3082 FailedCandidates.addCandidate().set(
3083 DeclAccessPair::make(Template, AS_public), Partial,
3084 MakeDeductionFailureInfo(S.Context, Result, Info));
3085 (void)Result;
3086 } else {
3087 Matched.push_back(PartialSpecMatchResult());
3088 Matched.back().Partial = Partial;
3089 Matched.back().Args = Info.take();
3090 }
3091 }
3092
3093 // If we're dealing with a member template where the template parameters
3094 // have been instantiated, this provides the original template parameters
3095 // from which the member template's parameters were instantiated.
3096
3097 if (Matched.size() >= 1) {
3098 SmallVectorImpl<MatchResult>::iterator Best = Matched.begin();
3099 if (Matched.size() == 1) {
3100 // -- If exactly one matching specialization is found, the
3101 // instantiation is generated from that specialization.
3102 // We don't need to do anything for this.
3103 } else {
3104 // -- If more than one matching specialization is found, the
3105 // partial order rules (14.5.4.2) are used to determine
3106 // whether one of the specializations is more specialized
3107 // than the others. If none of the specializations is more
3108 // specialized than all of the other matching
3109 // specializations, then the use of the class template is
3110 // ambiguous and the program is ill-formed.
3111 for (SmallVectorImpl<MatchResult>::iterator P = Best + 1,
3112 PEnd = Matched.end();
3113 P != PEnd; ++P) {
3114 if (S.getMoreSpecializedPartialSpecialization(
3115 P->Partial, Best->Partial, PointOfInstantiation) ==
3116 P->Partial)
3117 Best = P;
3118 }
3119
3120 // Determine if the best partial specialization is more specialized than
3121 // the others.
3122 bool Ambiguous = false;
3123 for (SmallVectorImpl<MatchResult>::iterator P = Matched.begin(),
3124 PEnd = Matched.end();
3125 P != PEnd; ++P) {
3126 if (P != Best && S.getMoreSpecializedPartialSpecialization(
3127 P->Partial, Best->Partial,
3128 PointOfInstantiation) != Best->Partial) {
3129 Ambiguous = true;
3130 break;
3131 }
3132 }
3133
3134 if (Ambiguous) {
3135 // Partial ordering did not produce a clear winner. Complain.
3136 Inst.Clear();
3137 ClassTemplateSpec->setInvalidDecl();
3138 S.Diag(PointOfInstantiation,
3139 diag::err_partial_spec_ordering_ambiguous)
3140 << ClassTemplateSpec;
3141
3142 // Print the matching partial specializations.
3143 for (SmallVectorImpl<MatchResult>::iterator P = Matched.begin(),
3144 PEnd = Matched.end();
3145 P != PEnd; ++P)
3146 S.Diag(P->Partial->getLocation(), diag::note_partial_spec_match)
3147 << S.getTemplateArgumentBindingsText(
3148 P->Partial->getTemplateParameters(), *P->Args);
3149
3150 return {/*Invalid=*/true};
3151 }
3152 }
3153
3154 ClassTemplateSpec->setInstantiationOf(Best->Partial, Best->Args);
3155 } else {
3156 // -- If no matches are found, the instantiation is generated
3157 // from the primary template.
3158 }
3159 }
3160
3161 CXXRecordDecl *Pattern = nullptr;
3162 Specialized = ClassTemplateSpec->getSpecializedTemplateOrPartial();
3163 if (auto *PartialSpec =
3164 Specialized.dyn_cast<ClassTemplatePartialSpecializationDecl *>()) {
3165 // Instantiate using the best class template partial specialization.
3166 while (PartialSpec->getInstantiatedFromMember()) {
3167 // If we've found an explicit specialization of this class template,
3168 // stop here and use that as the pattern.
3169 if (PartialSpec->isMemberSpecialization())
3170 break;
3171
3172 PartialSpec = PartialSpec->getInstantiatedFromMember();
3173 }
3174 Pattern = PartialSpec;
3175 } else {
3176 ClassTemplateDecl *Template = ClassTemplateSpec->getSpecializedTemplate();
3177 while (Template->getInstantiatedFromMemberTemplate()) {
3178 // If we've found an explicit specialization of this class template,
3179 // stop here and use that as the pattern.
3180 if (Template->isMemberSpecialization())
3181 break;
3182
3183 Template = Template->getInstantiatedFromMemberTemplate();
3184 }
3185 Pattern = Template->getTemplatedDecl();
3186 }
3187
3188 return Pattern;
3189}
3190
3191bool Sema::InstantiateClassTemplateSpecialization(
3192 SourceLocation PointOfInstantiation,
3193 ClassTemplateSpecializationDecl *ClassTemplateSpec,
3194 TemplateSpecializationKind TSK, bool Complain) {
3195 // Perform the actual instantiation on the canonical declaration.
3196 ClassTemplateSpec = cast<ClassTemplateSpecializationDecl>(
3197 ClassTemplateSpec->getCanonicalDecl());
3198 if (ClassTemplateSpec->isInvalidDecl())
3199 return true;
3200
3201 ActionResult<CXXRecordDecl *> Pattern =
3202 getPatternForClassTemplateSpecialization(*this, PointOfInstantiation,
3203 ClassTemplateSpec, TSK);
3204 if (!Pattern.isUsable())
3205 return Pattern.isInvalid();
3206
3207 return InstantiateClass(
3208 PointOfInstantiation, ClassTemplateSpec, Pattern.get(),
3209 getTemplateInstantiationArgs(ClassTemplateSpec), TSK, Complain);
3210}
3211
3212/// Instantiates the definitions of all of the member
3213/// of the given class, which is an instantiation of a class template
3214/// or a member class of a template.
3215void
3216Sema::InstantiateClassMembers(SourceLocation PointOfInstantiation,
3217 CXXRecordDecl *Instantiation,
3218 const MultiLevelTemplateArgumentList &TemplateArgs,
3219 TemplateSpecializationKind TSK) {
3220 // FIXME: We need to notify the ASTMutationListener that we did all of these
3221 // things, in case we have an explicit instantiation definition in a PCM, a
3222 // module, or preamble, and the declaration is in an imported AST.
3223 assert((static_cast<void> (0))
3224 (TSK == TSK_ExplicitInstantiationDefinition ||(static_cast<void> (0))
3225 TSK == TSK_ExplicitInstantiationDeclaration ||(static_cast<void> (0))
3226 (TSK == TSK_ImplicitInstantiation && Instantiation->isLocalClass())) &&(static_cast<void> (0))
3227 "Unexpected template specialization kind!")(static_cast<void> (0));
3228 for (auto *D : Instantiation->decls()) {
3229 bool SuppressNew = false;
3230 if (auto *Function = dyn_cast<FunctionDecl>(D)) {
3231 if (FunctionDecl *Pattern =
3232 Function->getInstantiatedFromMemberFunction()) {
3233
3234 if (Function->hasAttr<ExcludeFromExplicitInstantiationAttr>())
3235 continue;
3236
3237 MemberSpecializationInfo *MSInfo =
3238 Function->getMemberSpecializationInfo();
3239 assert(MSInfo && "No member specialization information?")(static_cast<void> (0));
3240 if (MSInfo->getTemplateSpecializationKind()
3241 == TSK_ExplicitSpecialization)
3242 continue;
3243
3244 if (CheckSpecializationInstantiationRedecl(PointOfInstantiation, TSK,
3245 Function,
3246 MSInfo->getTemplateSpecializationKind(),
3247 MSInfo->getPointOfInstantiation(),
3248 SuppressNew) ||
3249 SuppressNew)
3250 continue;
3251
3252 // C++11 [temp.explicit]p8:
3253 // An explicit instantiation definition that names a class template
3254 // specialization explicitly instantiates the class template
3255 // specialization and is only an explicit instantiation definition
3256 // of members whose definition is visible at the point of
3257 // instantiation.
3258 if (TSK == TSK_ExplicitInstantiationDefinition && !Pattern->isDefined())
3259 continue;
3260
3261 Function->setTemplateSpecializationKind(TSK, PointOfInstantiation);
3262
3263 if (Function->isDefined()) {
3264 // Let the ASTConsumer know that this function has been explicitly
3265 // instantiated now, and its linkage might have changed.
3266 Consumer.HandleTopLevelDecl(DeclGroupRef(Function));
3267 } else if (TSK == TSK_ExplicitInstantiationDefinition) {
3268 InstantiateFunctionDefinition(PointOfInstantiation, Function);
3269 } else if (TSK == TSK_ImplicitInstantiation) {
3270 PendingLocalImplicitInstantiations.push_back(
3271 std::make_pair(Function, PointOfInstantiation));
3272 }
3273 }
3274 } else if (auto *Var = dyn_cast<VarDecl>(D)) {
3275 if (isa<VarTemplateSpecializationDecl>(Var))
3276 continue;
3277
3278 if (Var->isStaticDataMember()) {
3279 if (Var->hasAttr<ExcludeFromExplicitInstantiationAttr>())
3280 continue;
3281
3282 MemberSpecializationInfo *MSInfo = Var->getMemberSpecializationInfo();
3283 assert(MSInfo && "No member specialization information?")(static_cast<void> (0));
3284 if (MSInfo->getTemplateSpecializationKind()
3285 == TSK_ExplicitSpecialization)
3286 continue;
3287
3288 if (CheckSpecializationInstantiationRedecl(PointOfInstantiation, TSK,
3289 Var,
3290 MSInfo->getTemplateSpecializationKind(),
3291 MSInfo->getPointOfInstantiation(),
3292 SuppressNew) ||
3293 SuppressNew)
3294 continue;
3295
3296 if (TSK == TSK_ExplicitInstantiationDefinition) {
3297 // C++0x [temp.explicit]p8:
3298 // An explicit instantiation definition that names a class template
3299 // specialization explicitly instantiates the class template
3300 // specialization and is only an explicit instantiation definition
3301 // of members whose definition is visible at the point of
3302 // instantiation.
3303 if (!Var->getInstantiatedFromStaticDataMember()->getDefinition())
3304 continue;
3305
3306 Var->setTemplateSpecializationKind(TSK, PointOfInstantiation);
3307 InstantiateVariableDefinition(PointOfInstantiation, Var);
3308 } else {
3309 Var->setTemplateSpecializationKind(TSK, PointOfInstantiation);
3310 }
3311 }
3312 } else if (auto *Record = dyn_cast<CXXRecordDecl>(D)) {
3313 if (Record->hasAttr<ExcludeFromExplicitInstantiationAttr>())
3314 continue;
3315
3316 // Always skip the injected-class-name, along with any
3317 // redeclarations of nested classes, since both would cause us
3318 // to try to instantiate the members of a class twice.
3319 // Skip closure types; they'll get instantiated when we instantiate
3320 // the corresponding lambda-expression.
3321 if (Record->isInjectedClassName() || Record->getPreviousDecl() ||
3322 Record->isLambda())
3323 continue;
3324
3325 MemberSpecializationInfo *MSInfo = Record->getMemberSpecializationInfo();
3326 assert(MSInfo && "No member specialization information?")(static_cast<void> (0));
3327
3328 if (MSInfo->getTemplateSpecializationKind()
3329 == TSK_ExplicitSpecialization)
3330 continue;
3331
3332 if (Context.getTargetInfo().getTriple().isOSWindows() &&
3333 TSK == TSK_ExplicitInstantiationDeclaration) {
3334 // On Windows, explicit instantiation decl of the outer class doesn't
3335 // affect the inner class. Typically extern template declarations are
3336 // used in combination with dll import/export annotations, but those
3337 // are not propagated from the outer class templates to inner classes.
3338 // Therefore, do not instantiate inner classes on this platform, so
3339 // that users don't end up with undefined symbols during linking.
3340 continue;
3341 }
3342
3343 if (CheckSpecializationInstantiationRedecl(PointOfInstantiation, TSK,
3344 Record,
3345 MSInfo->getTemplateSpecializationKind(),
3346 MSInfo->getPointOfInstantiation(),
3347 SuppressNew) ||
3348 SuppressNew)
3349 continue;
3350
3351 CXXRecordDecl *Pattern = Record->getInstantiatedFromMemberClass();
3352 assert(Pattern && "Missing instantiated-from-template information")(static_cast<void> (0));
3353
3354 if (!Record->getDefinition()) {
3355 if (!Pattern->getDefinition()) {
3356 // C++0x [temp.explicit]p8:
3357 // An explicit instantiation definition that names a class template
3358 // specialization explicitly instantiates the class template
3359 // specialization and is only an explicit instantiation definition
3360 // of members whose definition is visible at the point of
3361 // instantiation.
3362 if (TSK == TSK_ExplicitInstantiationDeclaration) {
3363 MSInfo->setTemplateSpecializationKind(TSK);
3364 MSInfo->setPointOfInstantiation(PointOfInstantiation);
3365 }
3366
3367 continue;
3368 }
3369
3370 InstantiateClass(PointOfInstantiation, Record, Pattern,
3371 TemplateArgs,
3372 TSK);
3373 } else {
3374 if (TSK == TSK_ExplicitInstantiationDefinition &&
3375 Record->getTemplateSpecializationKind() ==
3376 TSK_ExplicitInstantiationDeclaration) {
3377 Record->setTemplateSpecializationKind(TSK);
3378 MarkVTableUsed(PointOfInstantiation, Record, true);
3379 }
3380 }
3381
3382 Pattern = cast_or_null<CXXRecordDecl>(Record->getDefinition());
3383 if (Pattern)
3384 InstantiateClassMembers(PointOfInstantiation, Pattern, TemplateArgs,
3385 TSK);
3386 } else if (auto *Enum = dyn_cast<EnumDecl>(D)) {
3387 MemberSpecializationInfo *MSInfo = Enum->getMemberSpecializationInfo();
3388 assert(MSInfo && "No member specialization information?")(static_cast<void> (0));
3389
3390 if (MSInfo->getTemplateSpecializationKind()
3391 == TSK_ExplicitSpecialization)
3392 continue;
3393
3394 if (CheckSpecializationInstantiationRedecl(
3395 PointOfInstantiation, TSK, Enum,
3396 MSInfo->getTemplateSpecializationKind(),
3397 MSInfo->getPointOfInstantiation(), SuppressNew) ||
3398 SuppressNew)
3399 continue;
3400
3401 if (Enum->getDefinition())
3402 continue;
3403
3404 EnumDecl *Pattern = Enum->getTemplateInstantiationPattern();
3405 assert(Pattern && "Missing instantiated-from-template information")(static_cast<void> (0));
3406
3407 if (TSK == TSK_ExplicitInstantiationDefinition) {
3408 if (!Pattern->getDefinition())
3409 continue;
3410
3411 InstantiateEnum(PointOfInstantiation, Enum, Pattern, TemplateArgs, TSK);
3412 } else {
3413 MSInfo->setTemplateSpecializationKind(TSK);
3414 MSInfo->setPointOfInstantiation(PointOfInstantiation);
3415 }
3416 } else if (auto *Field = dyn_cast<FieldDecl>(D)) {
3417 // No need to instantiate in-class initializers during explicit
3418 // instantiation.
3419 if (Field->hasInClassInitializer() && TSK == TSK_ImplicitInstantiation) {
3420 CXXRecordDecl *ClassPattern =
3421 Instantiation->getTemplateInstantiationPattern();
3422 DeclContext::lookup_result Lookup =
3423 ClassPattern->lookup(Field->getDeclName());
3424 FieldDecl *Pattern = Lookup.find_first<FieldDecl>();
3425 assert(Pattern)(static_cast<void> (0));
3426 InstantiateInClassInitializer(PointOfInstantiation, Field, Pattern,
3427 TemplateArgs);
3428 }
3429 }
3430 }
3431}
3432
3433/// Instantiate the definitions of all of the members of the
3434/// given class template specialization, which was named as part of an
3435/// explicit instantiation.
3436void
3437Sema::InstantiateClassTemplateSpecializationMembers(
3438 SourceLocation PointOfInstantiation,
3439 ClassTemplateSpecializationDecl *ClassTemplateSpec,
3440 TemplateSpecializationKind TSK) {
3441 // C++0x [temp.explicit]p7:
3442 // An explicit instantiation that names a class template
3443 // specialization is an explicit instantion of the same kind
3444 // (declaration or definition) of each of its members (not
3445 // including members inherited from base classes) that has not
3446 // been previously explicitly specialized in the translation unit
3447 // containing the explicit instantiation, except as described
3448 // below.
3449 InstantiateClassMembers(PointOfInstantiation, ClassTemplateSpec,
3450 getTemplateInstantiationArgs(ClassTemplateSpec),
3451 TSK);
3452}
3453
3454StmtResult
3455Sema::SubstStmt(Stmt *S, const MultiLevelTemplateArgumentList &TemplateArgs) {
3456 if (!S)
3457 return S;
3458
3459 TemplateInstantiator Instantiator(*this, TemplateArgs,
3460 SourceLocation(),
3461 DeclarationName());
3462 return Instantiator.TransformStmt(S);
3463}
3464
3465bool Sema::SubstTemplateArguments(
3466 ArrayRef<TemplateArgumentLoc> Args,
3467 const MultiLevelTemplateArgumentList &TemplateArgs,
3468 TemplateArgumentListInfo &Out) {
3469 TemplateInstantiator Instantiator(*this, TemplateArgs,
3470 SourceLocation(),
3471 DeclarationName());
3472 return Instantiator.TransformTemplateArguments(Args.begin(), Args.end(),
3473 Out);
3474}
3475
3476ExprResult
3477Sema::SubstExpr(Expr *E, const MultiLevelTemplateArgumentList &TemplateArgs) {
3478 if (!E)
3479 return E;
3480
3481 TemplateInstantiator Instantiator(*this, TemplateArgs,
3482 SourceLocation(),
3483 DeclarationName());
3484 return Instantiator.TransformExpr(E);
3485}
3486
3487ExprResult Sema::SubstInitializer(Expr *Init,
3488 const MultiLevelTemplateArgumentList &TemplateArgs,
3489 bool CXXDirectInit) {
3490 TemplateInstantiator Instantiator(*this, TemplateArgs,
3491 SourceLocation(),
3492 DeclarationName());
3493 return Instantiator.TransformInitializer(Init, CXXDirectInit);
3494}
3495
3496bool Sema::SubstExprs(ArrayRef<Expr *> Exprs, bool IsCall,
3497 const MultiLevelTemplateArgumentList &TemplateArgs,
3498 SmallVectorImpl<Expr *> &Outputs) {
3499 if (Exprs.empty())
3500 return false;
3501
3502 TemplateInstantiator Instantiator(*this, TemplateArgs,
3503 SourceLocation(),
3504 DeclarationName());
3505 return Instantiator.TransformExprs(Exprs.data(), Exprs.size(),
3506 IsCall, Outputs);
3507}
3508
3509NestedNameSpecifierLoc
3510Sema::SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS,
3511 const MultiLevelTemplateArgumentList &TemplateArgs) {
3512 if (!NNS)
3513 return NestedNameSpecifierLoc();
3514
3515 TemplateInstantiator Instantiator(*this, TemplateArgs, NNS.getBeginLoc(),
3516 DeclarationName());
3517 return Instantiator.TransformNestedNameSpecifierLoc(NNS);
3518}
3519
3520/// Do template substitution on declaration name info.
3521DeclarationNameInfo
3522Sema::SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo,
3523 const MultiLevelTemplateArgumentList &TemplateArgs) {
3524 TemplateInstantiator Instantiator(*this, TemplateArgs, NameInfo.getLoc(),
3525 NameInfo.getName());
3526 return Instantiator.TransformDeclarationNameInfo(NameInfo);
3527}
3528
3529TemplateName
3530Sema::SubstTemplateName(NestedNameSpecifierLoc QualifierLoc,
3531 TemplateName Name, SourceLocation Loc,
3532 const MultiLevelTemplateArgumentList &TemplateArgs) {
3533 TemplateInstantiator Instantiator(*this, TemplateArgs, Loc,
3534 DeclarationName());
3535 CXXScopeSpec SS;
3536 SS.Adopt(QualifierLoc);
3537 return Instantiator.TransformTemplateName(SS, Name, Loc);
3538}
3539
3540bool Sema::Subst(const TemplateArgumentLoc *Args, unsigned NumArgs,
3541 TemplateArgumentListInfo &Result,
3542 const MultiLevelTemplateArgumentList &TemplateArgs) {
3543 TemplateInstantiator Instantiator(*this, TemplateArgs, SourceLocation(),
3544 DeclarationName());
3545
3546 return Instantiator.TransformTemplateArguments(Args, NumArgs, Result);
3547}
3548
3549static const Decl *getCanonicalParmVarDecl(const Decl *D) {
3550 // When storing ParmVarDecls in the local instantiation scope, we always
3551 // want to use the ParmVarDecl from the canonical function declaration,
3552 // since the map is then valid for any redeclaration or definition of that
3553 // function.
3554 if (const ParmVarDecl *PV = dyn_cast<ParmVarDecl>(D)) {
3555 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(PV->getDeclContext())) {
3556 unsigned i = PV->getFunctionScopeIndex();
3557 // This parameter might be from a freestanding function type within the
3558 // function and isn't necessarily referring to one of FD's parameters.
3559 if (i < FD->getNumParams() && FD->getParamDecl(i) == PV)
3560 return FD->getCanonicalDecl()->getParamDecl(i);
3561 }
3562 }
3563 return D;
3564}
3565
3566
3567llvm::PointerUnion<Decl *, LocalInstantiationScope::DeclArgumentPack *> *
3568LocalInstantiationScope::findInstantiationOf(const Decl *D) {
3569 D = getCanonicalParmVarDecl(D);
3570 for (LocalInstantiationScope *Current = this; Current;
3571 Current = Current->Outer) {
3572
3573 // Check if we found something within this scope.
3574 const Decl *CheckD = D;
3575 do {
3576 LocalDeclsMap::iterator Found = Current->LocalDecls.find(CheckD);
3577 if (Found != Current->LocalDecls.end())
3578 return &Found->second;
3579
3580 // If this is a tag declaration, it's possible that we need to look for
3581 // a previous declaration.
3582 if (const TagDecl *Tag = dyn_cast<TagDecl>(CheckD))
3583 CheckD = Tag->getPreviousDecl();
3584 else
3585 CheckD = nullptr;
3586 } while (CheckD);
3587
3588 // If we aren't combined with our outer scope, we're done.
3589 if (!Current->CombineWithOuterScope)
3590 break;
3591 }
3592
3593 // If we're performing a partial substitution during template argument
3594 // deduction, we may not have values for template parameters yet.
3595 if (isa<NonTypeTemplateParmDecl>(D) || isa<TemplateTypeParmDecl>(D) ||
3596 isa<TemplateTemplateParmDecl>(D))
3597 return nullptr;
3598
3599 // Local types referenced prior to definition may require instantiation.
3600 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D))
3601 if (RD->isLocalClass())
3602 return nullptr;
3603
3604 // Enumeration types referenced prior to definition may appear as a result of
3605 // error recovery.
3606 if (isa<EnumDecl>(D))
3607 return nullptr;
3608
3609 // Materialized typedefs/type alias for implicit deduction guides may require
3610 // instantiation.
3611 if (isa<TypedefNameDecl>(D) &&
3612 isa<CXXDeductionGuideDecl>(D->getDeclContext()))
3613 return nullptr;
3614
3615 // If we didn't find the decl, then we either have a sema bug, or we have a
3616 // forward reference to a label declaration. Return null to indicate that
3617 // we have an uninstantiated label.
3618 assert(isa<LabelDecl>(D) && "declaration not instantiated in this scope")(static_cast<void> (0));
3619 return nullptr;
3620}
3621
3622void LocalInstantiationScope::InstantiatedLocal(const Decl *D, Decl *Inst) {
3623 D = getCanonicalParmVarDecl(D);
3624 llvm::PointerUnion<Decl *, DeclArgumentPack *> &Stored = LocalDecls[D];
3625 if (Stored.isNull()) {
3626#ifndef NDEBUG1
3627 // It should not be present in any surrounding scope either.
3628 LocalInstantiationScope *Current = this;
3629 while (Current->CombineWithOuterScope && Current->Outer) {
3630 Current = Current->Outer;
3631 assert(Current->LocalDecls.find(D) == Current->LocalDecls.end() &&(static_cast<void> (0))
3632 "Instantiated local in inner and outer scopes")(static_cast<void> (0));
3633 }
3634#endif
3635 Stored = Inst;
3636 } else if (DeclArgumentPack *Pack = Stored.dyn_cast<DeclArgumentPack *>()) {
3637 Pack->push_back(cast<VarDecl>(Inst));
3638 } else {
3639 assert(Stored.get<Decl *>() == Inst && "Already instantiated this local")(static_cast<void> (0));
3640 }
3641}
3642
3643void LocalInstantiationScope::InstantiatedLocalPackArg(const Decl *D,
3644 VarDecl *Inst) {
3645 D = getCanonicalParmVarDecl(D);
3646 DeclArgumentPack *Pack = LocalDecls[D].get<DeclArgumentPack *>();
3647 Pack->push_back(Inst);
3648}
3649
3650void LocalInstantiationScope::MakeInstantiatedLocalArgPack(const Decl *D) {
3651#ifndef NDEBUG1
3652 // This should be the first time we've been told about this decl.
3653 for (LocalInstantiationScope *Current = this;
3654 Current && Current->CombineWithOuterScope; Current = Current->Outer)
3655 assert(Current->LocalDecls.find(D) == Current->LocalDecls.end() &&(static_cast<void> (0))
3656 "Creating local pack after instantiation of local")(static_cast<void> (0));
3657#endif
3658
3659 D = getCanonicalParmVarDecl(D);
3660 llvm::PointerUnion<Decl *, DeclArgumentPack *> &Stored = LocalDecls[D];
3661 DeclArgumentPack *Pack = new DeclArgumentPack;
3662 Stored = Pack;
3663 ArgumentPacks.push_back(Pack);
3664}
3665
3666bool LocalInstantiationScope::isLocalPackExpansion(const Decl *D) {
3667 for (DeclArgumentPack *Pack : ArgumentPacks)
3668 if (std::find(Pack->begin(), Pack->end(), D) != Pack->end())
3669 return true;
3670 return false;
3671}
3672
3673void LocalInstantiationScope::SetPartiallySubstitutedPack(NamedDecl *Pack,
3674 const TemplateArgument *ExplicitArgs,
3675 unsigned NumExplicitArgs) {
3676 assert((!PartiallySubstitutedPack || PartiallySubstitutedPack == Pack) &&(static_cast<void> (0))
3677 "Already have a partially-substituted pack")(static_cast<void> (0));
3678 assert((!PartiallySubstitutedPack(static_cast<void> (0))
3679 || NumArgsInPartiallySubstitutedPack == NumExplicitArgs) &&(static_cast<void> (0))
3680 "Wrong number of arguments in partially-substituted pack")(static_cast<void> (0));
3681 PartiallySubstitutedPack = Pack;
3682 ArgsInPartiallySubstitutedPack = ExplicitArgs;
3683 NumArgsInPartiallySubstitutedPack = NumExplicitArgs;
3684}
3685
3686NamedDecl *LocalInstantiationScope::getPartiallySubstitutedPack(
3687 const TemplateArgument **ExplicitArgs,
3688 unsigned *NumExplicitArgs) const {
3689 if (ExplicitArgs)
3690 *ExplicitArgs = nullptr;
3691 if (NumExplicitArgs)
3692 *NumExplicitArgs = 0;
3693
3694 for (const LocalInstantiationScope *Current = this; Current;
3695 Current = Current->Outer) {
3696 if (Current->PartiallySubstitutedPack) {
3697 if (ExplicitArgs)
3698 *ExplicitArgs = Current->ArgsInPartiallySubstitutedPack;
3699 if (NumExplicitArgs)
3700 *NumExplicitArgs = Current->NumArgsInPartiallySubstitutedPack;
3701
3702 return Current->PartiallySubstitutedPack;
3703 }
3704
3705 if (!Current->CombineWithOuterScope)
3706 break;
3707 }
3708
3709 return nullptr;
3710}

/build/llvm-toolchain-snapshot-14~++20210903100615+fd66b44ec19e/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/Basic/DiagnosticParse.h"
32#include "clang/Basic/OpenMPKinds.h"
33#include "clang/Sema/Designator.h"
34#include "clang/Sema/Lookup.h"
35#include "clang/Sema/Ownership.h"
36#include "clang/Sema/ParsedTemplate.h"
37#include "clang/Sema/ScopeInfo.h"
38#include "clang/Sema/SemaDiagnostic.h"
39#include "clang/Sema/SemaInternal.h"
40#include "llvm/ADT/ArrayRef.h"
41#include "llvm/Support/ErrorHandling.h"
42#include <algorithm>
43
44using namespace llvm::omp;
45
46namespace clang {
47using namespace sema;
48
49/// A semantic tree transformation that allows one to transform one
50/// abstract syntax tree into another.
51///
52/// A new tree transformation is defined by creating a new subclass \c X of
53/// \c TreeTransform<X> and then overriding certain operations to provide
54/// behavior specific to that transformation. For example, template
55/// instantiation is implemented as a tree transformation where the
56/// transformation of TemplateTypeParmType nodes involves substituting the
57/// template arguments for their corresponding template parameters; a similar
58/// transformation is performed for non-type template parameters and
59/// template template parameters.
60///
61/// This tree-transformation template uses static polymorphism to allow
62/// subclasses to customize any of its operations. Thus, a subclass can
63/// override any of the transformation or rebuild operators by providing an
64/// operation with the same signature as the default implementation. The
65/// overriding function should not be virtual.
66///
67/// Semantic tree transformations are split into two stages, either of which
68/// can be replaced by a subclass. The "transform" step transforms an AST node
69/// or the parts of an AST node using the various transformation functions,
70/// then passes the pieces on to the "rebuild" step, which constructs a new AST
71/// node of the appropriate kind from the pieces. The default transformation
72/// routines recursively transform the operands to composite AST nodes (e.g.,
73/// the pointee type of a PointerType node) and, if any of those operand nodes
74/// were changed by the transformation, invokes the rebuild operation to create
75/// a new AST node.
76///
77/// Subclasses can customize the transformation at various levels. The
78/// most coarse-grained transformations involve replacing TransformType(),
79/// TransformExpr(), TransformDecl(), TransformNestedNameSpecifierLoc(),
80/// TransformTemplateName(), or TransformTemplateArgument() with entirely
81/// new implementations.
82///
83/// For more fine-grained transformations, subclasses can replace any of the
84/// \c TransformXXX functions (where XXX is the name of an AST node, e.g.,
85/// PointerType, StmtExpr) to alter the transformation. As mentioned previously,
86/// replacing TransformTemplateTypeParmType() allows template instantiation
87/// to substitute template arguments for their corresponding template
88/// parameters. Additionally, subclasses can override the \c RebuildXXX
89/// functions to control how AST nodes are rebuilt when their operands change.
90/// By default, \c TreeTransform will invoke semantic analysis to rebuild
91/// AST nodes. However, certain other tree transformations (e.g, cloning) may
92/// be able to use more efficient rebuild steps.
93///
94/// There are a handful of other functions that can be overridden, allowing one
95/// to avoid traversing nodes that don't need any transformation
96/// (\c AlreadyTransformed()), force rebuilding AST nodes even when their
97/// operands have not changed (\c AlwaysRebuild()), and customize the
98/// default locations and entity names used for type-checking
99/// (\c getBaseLocation(), \c getBaseEntity()).
100template<typename Derived>
101class TreeTransform {
102 /// Private RAII object that helps us forget and then re-remember
103 /// the template argument corresponding to a partially-substituted parameter
104 /// pack.
105 class ForgetPartiallySubstitutedPackRAII {
106 Derived &Self;
107 TemplateArgument Old;
108
109 public:
110 ForgetPartiallySubstitutedPackRAII(Derived &Self) : Self(Self) {
111 Old = Self.ForgetPartiallySubstitutedPack();
112 }
113
114 ~ForgetPartiallySubstitutedPackRAII() {
115 Self.RememberPartiallySubstitutedPack(Old);
116 }
117 };
118
119protected:
120 Sema &SemaRef;
121
122 /// The set of local declarations that have been transformed, for
123 /// cases where we are forced to build new declarations within the transformer
124 /// rather than in the subclass (e.g., lambda closure types).
125 llvm::DenseMap<Decl *, Decl *> TransformedLocalDecls;
126
127public:
128 /// Initializes a new tree transformer.
129 TreeTransform(Sema &SemaRef) : SemaRef(SemaRef) { }
130
131 /// Retrieves a reference to the derived class.
132 Derived &getDerived() { return static_cast<Derived&>(*this); }
133
134 /// Retrieves a reference to the derived class.
135 const Derived &getDerived() const {
136 return static_cast<const Derived&>(*this);
137 }
138
139 static inline ExprResult Owned(Expr *E) { return E; }
140 static inline StmtResult Owned(Stmt *S) { return S; }
141
142 /// Retrieves a reference to the semantic analysis object used for
143 /// this tree transform.
144 Sema &getSema() const { return SemaRef; }
145
146 /// Whether the transformation should always rebuild AST nodes, even
147 /// if none of the children have changed.
148 ///
149 /// Subclasses may override this function to specify when the transformation
150 /// should rebuild all AST nodes.
151 ///
152 /// We must always rebuild all AST nodes when performing variadic template
153 /// pack expansion, in order to avoid violating the AST invariant that each
154 /// statement node appears at most once in its containing declaration.
155 bool AlwaysRebuild() { return SemaRef.ArgumentPackSubstitutionIndex != -1; }
156
157 /// Whether the transformation is forming an expression or statement that
158 /// replaces the original. In this case, we'll reuse mangling numbers from
159 /// existing lambdas.
160 bool ReplacingOriginal() { return false; }
161
162 /// Wether CXXConstructExpr can be skipped when they are implicit.
163 /// They will be reconstructed when used if needed.
164 /// This is usefull when the user that cause rebuilding of the
165 /// CXXConstructExpr is outside of the expression at which the TreeTransform
166 /// started.
167 bool AllowSkippingCXXConstructExpr() { return true; }
168
169 /// Returns the location of the entity being transformed, if that
170 /// information was not available elsewhere in the AST.
171 ///
172 /// By default, returns no source-location information. Subclasses can
173 /// provide an alternative implementation that provides better location
174 /// information.
175 SourceLocation getBaseLocation() { return SourceLocation(); }
176
177 /// Returns the name of the entity being transformed, if that
178 /// information was not available elsewhere in the AST.
179 ///
180 /// By default, returns an empty name. Subclasses can provide an alternative
181 /// implementation with a more precise name.
182 DeclarationName getBaseEntity() { return DeclarationName(); }
183
184 /// Sets the "base" location and entity when that
185 /// information is known based on another transformation.
186 ///
187 /// By default, the source location and entity are ignored. Subclasses can
188 /// override this function to provide a customized implementation.
189 void setBase(SourceLocation Loc, DeclarationName Entity) { }
190
191 /// RAII object that temporarily sets the base location and entity
192 /// used for reporting diagnostics in types.
193 class TemporaryBase {
194 TreeTransform &Self;
195 SourceLocation OldLocation;
196 DeclarationName OldEntity;
197
198 public:
199 TemporaryBase(TreeTransform &Self, SourceLocation Location,
200 DeclarationName Entity) : Self(Self) {
201 OldLocation = Self.getDerived().getBaseLocation();
202 OldEntity = Self.getDerived().getBaseEntity();
203
204 if (Location.isValid())
205 Self.getDerived().setBase(Location, Entity);
206 }
207
208 ~TemporaryBase() {
209 Self.getDerived().setBase(OldLocation, OldEntity);
210 }
211 };
212
213 /// Determine whether the given type \p T has already been
214 /// transformed.
215 ///
216 /// Subclasses can provide an alternative implementation of this routine
217 /// to short-circuit evaluation when it is known that a given type will
218 /// not change. For example, template instantiation need not traverse
219 /// non-dependent types.
220 bool AlreadyTransformed(QualType T) {
221 return T.isNull();
222 }
223
224 /// Transform a template parameter depth level.
225 ///
226 /// During a transformation that transforms template parameters, this maps
227 /// an old template parameter depth to a new depth.
228 unsigned TransformTemplateDepth(unsigned Depth) {
229 return Depth;
230 }
231
232 /// Determine whether the given call argument should be dropped, e.g.,
233 /// because it is a default argument.
234 ///
235 /// Subclasses can provide an alternative implementation of this routine to
236 /// determine which kinds of call arguments get dropped. By default,
237 /// CXXDefaultArgument nodes are dropped (prior to transformation).
238 bool DropCallArgument(Expr *E) {
239 return E->isDefaultArgument();
240 }
241
242 /// Determine whether we should expand a pack expansion with the
243 /// given set of parameter packs into separate arguments by repeatedly
244 /// transforming the pattern.
245 ///
246 /// By default, the transformer never tries to expand pack expansions.
247 /// Subclasses can override this routine to provide different behavior.
248 ///
249 /// \param EllipsisLoc The location of the ellipsis that identifies the
250 /// pack expansion.
251 ///
252 /// \param PatternRange The source range that covers the entire pattern of
253 /// the pack expansion.
254 ///
255 /// \param Unexpanded The set of unexpanded parameter packs within the
256 /// pattern.
257 ///
258 /// \param ShouldExpand Will be set to \c true if the transformer should
259 /// expand the corresponding pack expansions into separate arguments. When
260 /// set, \c NumExpansions must also be set.
261 ///
262 /// \param RetainExpansion Whether the caller should add an unexpanded
263 /// pack expansion after all of the expanded arguments. This is used
264 /// when extending explicitly-specified template argument packs per
265 /// C++0x [temp.arg.explicit]p9.
266 ///
267 /// \param NumExpansions The number of separate arguments that will be in
268 /// the expanded form of the corresponding pack expansion. This is both an
269 /// input and an output parameter, which can be set by the caller if the
270 /// number of expansions is known a priori (e.g., due to a prior substitution)
271 /// and will be set by the callee when the number of expansions is known.
272 /// The callee must set this value when \c ShouldExpand is \c true; it may
273 /// set this value in other cases.
274 ///
275 /// \returns true if an error occurred (e.g., because the parameter packs
276 /// are to be instantiated with arguments of different lengths), false
277 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions)
278 /// must be set.
279 bool TryExpandParameterPacks(SourceLocation EllipsisLoc,
280 SourceRange PatternRange,
281 ArrayRef<UnexpandedParameterPack> Unexpanded,
282 bool &ShouldExpand,
283 bool &RetainExpansion,
284 Optional<unsigned> &NumExpansions) {
285 ShouldExpand = false;
286 return false;
287 }
288
289 /// "Forget" about the partially-substituted pack template argument,
290 /// when performing an instantiation that must preserve the parameter pack
291 /// use.
292 ///
293 /// This routine is meant to be overridden by the template instantiator.
294 TemplateArgument ForgetPartiallySubstitutedPack() {
295 return TemplateArgument();
296 }
297
298 /// "Remember" the partially-substituted pack template argument
299 /// after performing an instantiation that must preserve the parameter pack
300 /// use.
301 ///
302 /// This routine is meant to be overridden by the template instantiator.
303 void RememberPartiallySubstitutedPack(TemplateArgument Arg) { }
304
305 /// Note to the derived class when a function parameter pack is
306 /// being expanded.
307 void ExpandingFunctionParameterPack(ParmVarDecl *Pack) { }
308
309 /// Transforms the given type into another type.
310 ///
311 /// By default, this routine transforms a type by creating a
312 /// TypeSourceInfo for it and delegating to the appropriate
313 /// function. This is expensive, but we don't mind, because
314 /// this method is deprecated anyway; all users should be
315 /// switched to storing TypeSourceInfos.
316 ///
317 /// \returns the transformed type.
318 QualType TransformType(QualType T);
319
320 /// Transforms the given type-with-location into a new
321 /// type-with-location.
322 ///
323 /// By default, this routine transforms a type by delegating to the
324 /// appropriate TransformXXXType to build a new type. Subclasses
325 /// may override this function (to take over all type
326 /// transformations) or some set of the TransformXXXType functions
327 /// to alter the transformation.
328 TypeSourceInfo *TransformType(TypeSourceInfo *DI);
329
330 /// Transform the given type-with-location into a new
331 /// type, collecting location information in the given builder
332 /// as necessary.
333 ///
334 QualType TransformType(TypeLocBuilder &TLB, TypeLoc TL);
335
336 /// Transform a type that is permitted to produce a
337 /// DeducedTemplateSpecializationType.
338 ///
339 /// This is used in the (relatively rare) contexts where it is acceptable
340 /// for transformation to produce a class template type with deduced
341 /// template arguments.
342 /// @{
343 QualType TransformTypeWithDeducedTST(QualType T);
344 TypeSourceInfo *TransformTypeWithDeducedTST(TypeSourceInfo *DI);
345 /// @}
346
347 /// The reason why the value of a statement is not discarded, if any.
348 enum StmtDiscardKind {
349 SDK_Discarded,
350 SDK_NotDiscarded,
351 SDK_StmtExprResult,
352 };
353
354 /// Transform the given statement.
355 ///
356 /// By default, this routine transforms a statement by delegating to the
357 /// appropriate TransformXXXStmt function to transform a specific kind of
358 /// statement or the TransformExpr() function to transform an expression.
359 /// Subclasses may override this function to transform statements using some
360 /// other mechanism.
361 ///
362 /// \returns the transformed statement.
363 StmtResult TransformStmt(Stmt *S, StmtDiscardKind SDK = SDK_Discarded);
364
365 /// Transform the given statement.
366 ///
367 /// By default, this routine transforms a statement by delegating to the
368 /// appropriate TransformOMPXXXClause function to transform a specific kind
369 /// of clause. Subclasses may override this function to transform statements
370 /// using some other mechanism.
371 ///
372 /// \returns the transformed OpenMP clause.
373 OMPClause *TransformOMPClause(OMPClause *S);
374
375 /// Transform the given attribute.
376 ///
377 /// By default, this routine transforms a statement by delegating to the
378 /// appropriate TransformXXXAttr function to transform a specific kind
379 /// of attribute. Subclasses may override this function to transform
380 /// attributed statements using some other mechanism.
381 ///
382 /// \returns the transformed attribute
383 const Attr *TransformAttr(const Attr *S);
384
385/// Transform the specified attribute.
386///
387/// Subclasses should override the transformation of attributes with a pragma
388/// spelling to transform expressions stored within the attribute.
389///
390/// \returns the transformed attribute.
391#define ATTR(X)
392#define PRAGMA_SPELLING_ATTR(X) \
393 const X##Attr *Transform##X##Attr(const X##Attr *R) { return R; }
394#include "clang/Basic/AttrList.inc"
395
396 /// Transform the given expression.
397 ///
398 /// By default, this routine transforms an expression by delegating to the
399 /// appropriate TransformXXXExpr function to build a new expression.
400 /// Subclasses may override this function to transform expressions using some
401 /// other mechanism.
402 ///
403 /// \returns the transformed expression.
404 ExprResult TransformExpr(Expr *E);
405
406 /// Transform the given initializer.
407 ///
408 /// By default, this routine transforms an initializer by stripping off the
409 /// semantic nodes added by initialization, then passing the result to
410 /// TransformExpr or TransformExprs.
411 ///
412 /// \returns the transformed initializer.
413 ExprResult TransformInitializer(Expr *Init, bool NotCopyInit);
414
415 /// Transform the given list of expressions.
416 ///
417 /// This routine transforms a list of expressions by invoking
418 /// \c TransformExpr() for each subexpression. However, it also provides
419 /// support for variadic templates by expanding any pack expansions (if the
420 /// derived class permits such expansion) along the way. When pack expansions
421 /// are present, the number of outputs may not equal the number of inputs.
422 ///
423 /// \param Inputs The set of expressions to be transformed.
424 ///
425 /// \param NumInputs The number of expressions in \c Inputs.
426 ///
427 /// \param IsCall If \c true, then this transform is being performed on
428 /// function-call arguments, and any arguments that should be dropped, will
429 /// be.
430 ///
431 /// \param Outputs The transformed input expressions will be added to this
432 /// vector.
433 ///
434 /// \param ArgChanged If non-NULL, will be set \c true if any argument changed
435 /// due to transformation.
436 ///
437 /// \returns true if an error occurred, false otherwise.
438 bool TransformExprs(Expr *const *Inputs, unsigned NumInputs, bool IsCall,
439 SmallVectorImpl<Expr *> &Outputs,
440 bool *ArgChanged = nullptr);
441
442 /// Transform the given declaration, which is referenced from a type
443 /// or expression.
444 ///
445 /// By default, acts as the identity function on declarations, unless the
446 /// transformer has had to transform the declaration itself. Subclasses
447 /// may override this function to provide alternate behavior.
448 Decl *TransformDecl(SourceLocation Loc, Decl *D) {
449 llvm::DenseMap<Decl *, Decl *>::iterator Known
450 = TransformedLocalDecls.find(D);
451 if (Known != TransformedLocalDecls.end())
452 return Known->second;
453
454 return D;
455 }
456
457 /// Transform the specified condition.
458 ///
459 /// By default, this transforms the variable and expression and rebuilds
460 /// the condition.
461 Sema::ConditionResult TransformCondition(SourceLocation Loc, VarDecl *Var,
462 Expr *Expr,
463 Sema::ConditionKind Kind);
464
465 /// Transform the attributes associated with the given declaration and
466 /// place them on the new declaration.
467 ///
468 /// By default, this operation does nothing. Subclasses may override this
469 /// behavior to transform attributes.
470 void transformAttrs(Decl *Old, Decl *New) { }
471
472 /// Note that a local declaration has been transformed by this
473 /// transformer.
474 ///
475 /// Local declarations are typically transformed via a call to
476 /// TransformDefinition. However, in some cases (e.g., lambda expressions),
477 /// the transformer itself has to transform the declarations. This routine
478 /// can be overridden by a subclass that keeps track of such mappings.
479 void transformedLocalDecl(Decl *Old, ArrayRef<Decl *> New) {
480 assert(New.size() == 1 &&(static_cast<void> (0))
481 "must override transformedLocalDecl if performing pack expansion")(static_cast<void> (0));
482 TransformedLocalDecls[Old] = New.front();
483 }
484
485 /// Transform the definition of the given declaration.
486 ///
487 /// By default, invokes TransformDecl() to transform the declaration.
488 /// Subclasses may override this function to provide alternate behavior.
489 Decl *TransformDefinition(SourceLocation Loc, Decl *D) {
490 return getDerived().TransformDecl(Loc, D);
491 }
492
493 /// Transform the given declaration, which was the first part of a
494 /// nested-name-specifier in a member access expression.
495 ///
496 /// This specific declaration transformation only applies to the first
497 /// identifier in a nested-name-specifier of a member access expression, e.g.,
498 /// the \c T in \c x->T::member
499 ///
500 /// By default, invokes TransformDecl() to transform the declaration.
501 /// Subclasses may override this function to provide alternate behavior.
502 NamedDecl *TransformFirstQualifierInScope(NamedDecl *D, SourceLocation Loc) {
503 return cast_or_null<NamedDecl>(getDerived().TransformDecl(Loc, D));
504 }
505
506 /// Transform the set of declarations in an OverloadExpr.
507 bool TransformOverloadExprDecls(OverloadExpr *Old, bool RequiresADL,
508 LookupResult &R);
509
510 /// Transform the given nested-name-specifier with source-location
511 /// information.
512 ///
513 /// By default, transforms all of the types and declarations within the
514 /// nested-name-specifier. Subclasses may override this function to provide
515 /// alternate behavior.
516 NestedNameSpecifierLoc
517 TransformNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS,
518 QualType ObjectType = QualType(),
519 NamedDecl *FirstQualifierInScope = nullptr);
520
521 /// Transform the given declaration name.
522 ///
523 /// By default, transforms the types of conversion function, constructor,
524 /// and destructor names and then (if needed) rebuilds the declaration name.
525 /// Identifiers and selectors are returned unmodified. Sublcasses may
526 /// override this function to provide alternate behavior.
527 DeclarationNameInfo
528 TransformDeclarationNameInfo(const DeclarationNameInfo &NameInfo);
529
530 bool TransformRequiresExprRequirements(ArrayRef<concepts::Requirement *> Reqs,
531 llvm::SmallVectorImpl<concepts::Requirement *> &Transformed);
532 concepts::TypeRequirement *
533 TransformTypeRequirement(concepts::TypeRequirement *Req);
534 concepts::ExprRequirement *
535 TransformExprRequirement(concepts::ExprRequirement *Req);
536 concepts::NestedRequirement *
537 TransformNestedRequirement(concepts::NestedRequirement *Req);
538
539 /// Transform the given template name.
540 ///
541 /// \param SS The nested-name-specifier that qualifies the template
542 /// name. This nested-name-specifier must already have been transformed.
543 ///
544 /// \param Name The template name to transform.
545 ///
546 /// \param NameLoc The source location of the template name.
547 ///
548 /// \param ObjectType If we're translating a template name within a member
549 /// access expression, this is the type of the object whose member template
550 /// is being referenced.
551 ///
552 /// \param FirstQualifierInScope If the first part of a nested-name-specifier
553 /// also refers to a name within the current (lexical) scope, this is the
554 /// declaration it refers to.
555 ///
556 /// By default, transforms the template name by transforming the declarations
557 /// and nested-name-specifiers that occur within the template name.
558 /// Subclasses may override this function to provide alternate behavior.
559 TemplateName
560 TransformTemplateName(CXXScopeSpec &SS, TemplateName Name,
561 SourceLocation NameLoc,
562 QualType ObjectType = QualType(),
563 NamedDecl *FirstQualifierInScope = nullptr,
564 bool AllowInjectedClassName = false);
565
566 /// Transform the given template argument.
567 ///
568 /// By default, this operation transforms the type, expression, or
569 /// declaration stored within the template argument and constructs a
570 /// new template argument from the transformed result. Subclasses may
571 /// override this function to provide alternate behavior.
572 ///
573 /// Returns true if there was an error.
574 bool TransformTemplateArgument(const TemplateArgumentLoc &Input,
575 TemplateArgumentLoc &Output,
576 bool Uneval = false);
577
578 /// Transform the given set of template arguments.
579 ///
580 /// By default, this operation transforms all of the template arguments
581 /// in the input set using \c TransformTemplateArgument(), and appends
582 /// the transformed arguments to the output list.
583 ///
584 /// Note that this overload of \c TransformTemplateArguments() is merely
585 /// a convenience function. Subclasses that wish to override this behavior
586 /// should override the iterator-based member template version.
587 ///
588 /// \param Inputs The set of template arguments to be transformed.
589 ///
590 /// \param NumInputs The number of template arguments in \p Inputs.
591 ///
592 /// \param Outputs The set of transformed template arguments output by this
593 /// routine.
594 ///
595 /// Returns true if an error occurred.
596 bool TransformTemplateArguments(const TemplateArgumentLoc *Inputs,
597 unsigned NumInputs,
598 TemplateArgumentListInfo &Outputs,
599 bool Uneval = false) {
600 return TransformTemplateArguments(Inputs, Inputs + NumInputs, Outputs,
601 Uneval);
602 }
603
604 /// Transform the given set of template arguments.
605 ///
606 /// By default, this operation transforms all of the template arguments
607 /// in the input set using \c TransformTemplateArgument(), and appends
608 /// the transformed arguments to the output list.
609 ///
610 /// \param First An iterator to the first template argument.
611 ///
612 /// \param Last An iterator one step past the last template argument.
613 ///
614 /// \param Outputs The set of transformed template arguments output by this
615 /// routine.
616 ///
617 /// Returns true if an error occurred.
618 template<typename InputIterator>
619 bool TransformTemplateArguments(InputIterator First,
620 InputIterator Last,
621 TemplateArgumentListInfo &Outputs,
622 bool Uneval = false);
623
624 /// Fakes up a TemplateArgumentLoc for a given TemplateArgument.
625 void InventTemplateArgumentLoc(const TemplateArgument &Arg,
626 TemplateArgumentLoc &ArgLoc);
627
628 /// Fakes up a TypeSourceInfo for a type.
629 TypeSourceInfo *InventTypeSourceInfo(QualType T) {
630 return SemaRef.Context.getTrivialTypeSourceInfo(T,
631 getDerived().getBaseLocation());
632 }
633
634#define ABSTRACT_TYPELOC(CLASS, PARENT)
635#define TYPELOC(CLASS, PARENT) \
636 QualType Transform##CLASS##Type(TypeLocBuilder &TLB, CLASS##TypeLoc T);
637#include "clang/AST/TypeLocNodes.def"
638
639 template<typename Fn>
640 QualType TransformFunctionProtoType(TypeLocBuilder &TLB,
641 FunctionProtoTypeLoc TL,
642 CXXRecordDecl *ThisContext,
643 Qualifiers ThisTypeQuals,
644 Fn TransformExceptionSpec);
645
646 bool TransformExceptionSpec(SourceLocation Loc,
647 FunctionProtoType::ExceptionSpecInfo &ESI,
648 SmallVectorImpl<QualType> &Exceptions,
649 bool &Changed);
650
651 StmtResult TransformSEHHandler(Stmt *Handler);
652
653 QualType
654 TransformTemplateSpecializationType(TypeLocBuilder &TLB,
655 TemplateSpecializationTypeLoc TL,
656 TemplateName Template);
657
658 QualType
659 TransformDependentTemplateSpecializationType(TypeLocBuilder &TLB,
660 DependentTemplateSpecializationTypeLoc TL,
661 TemplateName Template,
662 CXXScopeSpec &SS);
663
664 QualType TransformDependentTemplateSpecializationType(
665 TypeLocBuilder &TLB, DependentTemplateSpecializationTypeLoc TL,
666 NestedNameSpecifierLoc QualifierLoc);
667
668 /// Transforms the parameters of a function type into the
669 /// given vectors.
670 ///
671 /// The result vectors should be kept in sync; null entries in the
672 /// variables vector are acceptable.
673 ///
674 /// Return true on error.
675 bool TransformFunctionTypeParams(
676 SourceLocation Loc, ArrayRef<ParmVarDecl *> Params,
677 const QualType *ParamTypes,
678 const FunctionProtoType::ExtParameterInfo *ParamInfos,
679 SmallVectorImpl<QualType> &PTypes, SmallVectorImpl<ParmVarDecl *> *PVars,
680 Sema::ExtParameterInfoBuilder &PInfos);
681
682 /// Transforms a single function-type parameter. Return null
683 /// on error.
684 ///
685 /// \param indexAdjustment - A number to add to the parameter's
686 /// scope index; can be negative
687 ParmVarDecl *TransformFunctionTypeParam(ParmVarDecl *OldParm,
688 int indexAdjustment,
689 Optional<unsigned> NumExpansions,
690 bool ExpectParameterPack);
691
692 /// Transform the body of a lambda-expression.
693 StmtResult TransformLambdaBody(LambdaExpr *E, Stmt *Body);
694 /// Alternative implementation of TransformLambdaBody that skips transforming
695 /// the body.
696 StmtResult SkipLambdaBody(LambdaExpr *E, Stmt *Body);
697
698 QualType TransformReferenceType(TypeLocBuilder &TLB, ReferenceTypeLoc TL);
699
700 StmtResult TransformCompoundStmt(CompoundStmt *S, bool IsStmtExpr);
701 ExprResult TransformCXXNamedCastExpr(CXXNamedCastExpr *E);
702
703 TemplateParameterList *TransformTemplateParameterList(
704 TemplateParameterList *TPL) {
705 return TPL;
706 }
707
708 ExprResult TransformAddressOfOperand(Expr *E);
709
710 ExprResult TransformDependentScopeDeclRefExpr(DependentScopeDeclRefExpr *E,
711 bool IsAddressOfOperand,
712 TypeSourceInfo **RecoveryTSI);
713
714 ExprResult TransformParenDependentScopeDeclRefExpr(
715 ParenExpr *PE, DependentScopeDeclRefExpr *DRE, bool IsAddressOfOperand,
716 TypeSourceInfo **RecoveryTSI);
717
718 StmtResult TransformOMPExecutableDirective(OMPExecutableDirective *S);
719
720// FIXME: We use LLVM_ATTRIBUTE_NOINLINE because inlining causes a ridiculous
721// amount of stack usage with clang.
722#define STMT(Node, Parent) \
723 LLVM_ATTRIBUTE_NOINLINE__attribute__((noinline)) \
724 StmtResult Transform##Node(Node *S);
725#define VALUESTMT(Node, Parent) \
726 LLVM_ATTRIBUTE_NOINLINE__attribute__((noinline)) \
727 StmtResult Transform##Node(Node *S, StmtDiscardKind SDK);
728#define EXPR(Node, Parent) \
729 LLVM_ATTRIBUTE_NOINLINE__attribute__((noinline)) \
730 ExprResult Transform##Node(Node *E);
731#define ABSTRACT_STMT(Stmt)
732#include "clang/AST/StmtNodes.inc"
733
734#define GEN_CLANG_CLAUSE_CLASS
735#define CLAUSE_CLASS(Enum, Str, Class) \
736 LLVM_ATTRIBUTE_NOINLINE__attribute__((noinline)) \
737 OMPClause *Transform##Class(Class *S);
738#include "llvm/Frontend/OpenMP/OMP.inc"
739
740 /// Build a new qualified type given its unqualified type and type location.
741 ///
742 /// By default, this routine adds type qualifiers only to types that can
743 /// have qualifiers, and silently suppresses those qualifiers that are not
744 /// permitted. Subclasses may override this routine to provide different
745 /// behavior.
746 QualType RebuildQualifiedType(QualType T, QualifiedTypeLoc TL);
747
748 /// Build a new pointer type given its pointee type.
749 ///
750 /// By default, performs semantic analysis when building the pointer type.
751 /// Subclasses may override this routine to provide different behavior.
752 QualType RebuildPointerType(QualType PointeeType, SourceLocation Sigil);
753
754 /// Build a new block pointer type given its pointee type.
755 ///
756 /// By default, performs semantic analysis when building the block pointer
757 /// type. Subclasses may override this routine to provide different behavior.
758 QualType RebuildBlockPointerType(QualType PointeeType, SourceLocation Sigil);
759
760 /// Build a new reference type given the type it references.
761 ///
762 /// By default, performs semantic analysis when building the
763 /// reference type. Subclasses may override this routine to provide
764 /// different behavior.
765 ///
766 /// \param LValue whether the type was written with an lvalue sigil
767 /// or an rvalue sigil.
768 QualType RebuildReferenceType(QualType ReferentType,
769 bool LValue,
770 SourceLocation Sigil);
771
772 /// Build a new member pointer type given the pointee type and the
773 /// class type it refers into.
774 ///
775 /// By default, performs semantic analysis when building the member pointer
776 /// type. Subclasses may override this routine to provide different behavior.
777 QualType RebuildMemberPointerType(QualType PointeeType, QualType ClassType,
778 SourceLocation Sigil);
779
780 QualType RebuildObjCTypeParamType(const ObjCTypeParamDecl *Decl,
781 SourceLocation ProtocolLAngleLoc,
782 ArrayRef<ObjCProtocolDecl *> Protocols,
783 ArrayRef<SourceLocation> ProtocolLocs,
784 SourceLocation ProtocolRAngleLoc);
785
786 /// Build an Objective-C object type.
787 ///
788 /// By default, performs semantic analysis when building the object type.
789 /// Subclasses may override this routine to provide different behavior.
790 QualType RebuildObjCObjectType(QualType BaseType,
791 SourceLocation Loc,
792 SourceLocation TypeArgsLAngleLoc,
793 ArrayRef<TypeSourceInfo *> TypeArgs,
794 SourceLocation TypeArgsRAngleLoc,
795 SourceLocation ProtocolLAngleLoc,
796 ArrayRef<ObjCProtocolDecl *> Protocols,
797 ArrayRef<SourceLocation> ProtocolLocs,
798 SourceLocation ProtocolRAngleLoc);
799
800 /// Build a new Objective-C object pointer type given the pointee type.
801 ///
802 /// By default, directly builds the pointer type, with no additional semantic
803 /// analysis.
804 QualType RebuildObjCObjectPointerType(QualType PointeeType,
805 SourceLocation Star);
806
807 /// Build a new array type given the element type, size
808 /// modifier, size of the array (if known), size expression, and index type
809 /// qualifiers.
810 ///
811 /// By default, performs semantic analysis when building the array type.
812 /// Subclasses may override this routine to provide different behavior.
813 /// Also by default, all of the other Rebuild*Array
814 QualType RebuildArrayType(QualType ElementType,
815 ArrayType::ArraySizeModifier SizeMod,
816 const llvm::APInt *Size,
817 Expr *SizeExpr,
818 unsigned IndexTypeQuals,
819 SourceRange BracketsRange);
820
821 /// Build a new constant array type given the element type, size
822 /// modifier, (known) size of the array, and index type qualifiers.
823 ///
824 /// By default, performs semantic analysis when building the array type.
825 /// Subclasses may override this routine to provide different behavior.
826 QualType RebuildConstantArrayType(QualType ElementType,
827 ArrayType::ArraySizeModifier SizeMod,
828 const llvm::APInt &Size,
829 Expr *SizeExpr,
830 unsigned IndexTypeQuals,
831 SourceRange BracketsRange);
832
833 /// Build a new incomplete array type given the element type, size
834 /// modifier, and index type qualifiers.
835 ///
836 /// By default, performs semantic analysis when building the array type.
837 /// Subclasses may override this routine to provide different behavior.
838 QualType RebuildIncompleteArrayType(QualType ElementType,
839 ArrayType::ArraySizeModifier SizeMod,
840 unsigned IndexTypeQuals,
841 SourceRange BracketsRange);
842
843 /// Build a new variable-length array type given the element type,
844 /// size modifier, size expression, and index type qualifiers.
845 ///
846 /// By default, performs semantic analysis when building the array type.
847 /// Subclasses may override this routine to provide different behavior.
848 QualType RebuildVariableArrayType(QualType ElementType,
849 ArrayType::ArraySizeModifier SizeMod,
850 Expr *SizeExpr,
851 unsigned IndexTypeQuals,
852 SourceRange BracketsRange);
853
854 /// Build a new dependent-sized array type given the element type,
855 /// size modifier, size expression, and index type qualifiers.
856 ///
857 /// By default, performs semantic analysis when building the array type.
858 /// Subclasses may override this routine to provide different behavior.
859 QualType RebuildDependentSizedArrayType(QualType ElementType,
860 ArrayType::ArraySizeModifier SizeMod,
861 Expr *SizeExpr,
862 unsigned IndexTypeQuals,
863 SourceRange BracketsRange);
864
865 /// Build a new vector type given the element type and
866 /// number of elements.
867 ///
868 /// By default, performs semantic analysis when building the vector type.
869 /// Subclasses may override this routine to provide different behavior.
870 QualType RebuildVectorType(QualType ElementType, unsigned NumElements,
871 VectorType::VectorKind VecKind);
872
873 /// Build a new potentially dependently-sized extended vector type
874 /// given the element type and number of elements.
875 ///
876 /// By default, performs semantic analysis when building the vector type.
877 /// Subclasses may override this routine to provide different behavior.
878 QualType RebuildDependentVectorType(QualType ElementType, Expr *SizeExpr,
879 SourceLocation AttributeLoc,
880 VectorType::VectorKind);
881
882 /// Build a new extended vector type given the element type and
883 /// number of elements.
884 ///
885 /// By default, performs semantic analysis when building the vector type.
886 /// Subclasses may override this routine to provide different behavior.
887 QualType RebuildExtVectorType(QualType ElementType, unsigned NumElements,
888 SourceLocation AttributeLoc);
889
890 /// Build a new potentially dependently-sized extended vector type
891 /// given the element type and number of elements.
892 ///
893 /// By default, performs semantic analysis when building the vector type.
894 /// Subclasses may override this routine to provide different behavior.
895 QualType RebuildDependentSizedExtVectorType(QualType ElementType,
896 Expr *SizeExpr,
897 SourceLocation AttributeLoc);
898
899 /// Build a new matrix type given the element type and dimensions.
900 QualType RebuildConstantMatrixType(QualType ElementType, unsigned NumRows,
901 unsigned NumColumns);
902
903 /// Build a new matrix type given the type and dependently-defined
904 /// dimensions.
905 QualType RebuildDependentSizedMatrixType(QualType ElementType, Expr *RowExpr,
906 Expr *ColumnExpr,
907 SourceLocation AttributeLoc);
908
909 /// Build a new DependentAddressSpaceType or return the pointee
910 /// type variable with the correct address space (retrieved from
911 /// AddrSpaceExpr) applied to it. The former will be returned in cases
912 /// where the address space remains dependent.
913 ///
914 /// By default, performs semantic analysis when building the type with address
915 /// space applied. Subclasses may override this routine to provide different
916 /// behavior.
917 QualType RebuildDependentAddressSpaceType(QualType PointeeType,
918 Expr *AddrSpaceExpr,
919 SourceLocation AttributeLoc);
920
921 /// Build a new function type.
922 ///
923 /// By default, performs semantic analysis when building the function type.
924 /// Subclasses may override this routine to provide different behavior.
925 QualType RebuildFunctionProtoType(QualType T,
926 MutableArrayRef<QualType> ParamTypes,
927 const FunctionProtoType::ExtProtoInfo &EPI);
928
929 /// Build a new unprototyped function type.
930 QualType RebuildFunctionNoProtoType(QualType ResultType);
931
932 /// Rebuild an unresolved typename type, given the decl that
933 /// the UnresolvedUsingTypenameDecl was transformed to.
934 QualType RebuildUnresolvedUsingType(SourceLocation NameLoc, Decl *D);
935
936 /// Build a new typedef type.
937 QualType RebuildTypedefType(TypedefNameDecl *Typedef) {
938 return SemaRef.Context.getTypeDeclType(Typedef);
939 }
940
941 /// Build a new MacroDefined type.
942 QualType RebuildMacroQualifiedType(QualType T,
943 const IdentifierInfo *MacroII) {
944 return SemaRef.Context.getMacroQualifiedType(T, MacroII);
945 }
946
947 /// Build a new class/struct/union type.
948 QualType RebuildRecordType(RecordDecl *Record) {
949 return SemaRef.Context.getTypeDeclType(Record);
950 }
951
952 /// Build a new Enum type.
953 QualType RebuildEnumType(EnumDecl *Enum) {
954 return SemaRef.Context.getTypeDeclType(Enum);
955 }
956
957 /// Build a new typeof(expr) type.
958 ///
959 /// By default, performs semantic analysis when building the typeof type.
960 /// Subclasses may override this routine to provide different behavior.
961 QualType RebuildTypeOfExprType(Expr *Underlying, SourceLocation Loc);
962
963 /// Build a new typeof(type) type.
964 ///
965 /// By default, builds a new TypeOfType with the given underlying type.
966 QualType RebuildTypeOfType(QualType Underlying);
967
968 /// Build a new unary transform type.
969 QualType RebuildUnaryTransformType(QualType BaseType,
970 UnaryTransformType::UTTKind UKind,
971 SourceLocation Loc);
972
973 /// Build a new C++11 decltype type.
974 ///
975 /// By default, performs semantic analysis when building the decltype type.
976 /// Subclasses may override this routine to provide different behavior.
977 QualType RebuildDecltypeType(Expr *Underlying, SourceLocation Loc);
978
979 /// Build a new C++11 auto type.
980 ///
981 /// By default, builds a new AutoType with the given deduced type.
982 QualType RebuildAutoType(QualType Deduced, AutoTypeKeyword Keyword,
983 ConceptDecl *TypeConstraintConcept,
984 ArrayRef<TemplateArgument> TypeConstraintArgs) {
985 // Note, IsDependent is always false here: we implicitly convert an 'auto'
986 // which has been deduced to a dependent type into an undeduced 'auto', so
987 // that we'll retry deduction after the transformation.
988 return SemaRef.Context.getAutoType(Deduced, Keyword,
989 /*IsDependent*/ false, /*IsPack=*/false,
990 TypeConstraintConcept,
991 TypeConstraintArgs);
992 }
993
994 /// By default, builds a new DeducedTemplateSpecializationType with the given
995 /// deduced type.
996 QualType RebuildDeducedTemplateSpecializationType(TemplateName Template,
997 QualType Deduced) {
998 return SemaRef.Context.getDeducedTemplateSpecializationType(
999 Template, Deduced, /*IsDependent*/ false);
1000 }
1001
1002 /// Build a new template specialization type.
1003 ///
1004 /// By default, performs semantic analysis when building the template
1005 /// specialization type. Subclasses may override this routine to provide
1006 /// different behavior.
1007 QualType RebuildTemplateSpecializationType(TemplateName Template,
1008 SourceLocation TemplateLoc,
1009 TemplateArgumentListInfo &Args);
1010
1011 /// Build a new parenthesized type.
1012 ///
1013 /// By default, builds a new ParenType type from the inner type.
1014 /// Subclasses may override this routine to provide different behavior.
1015 QualType RebuildParenType(QualType InnerType) {
1016 return SemaRef.BuildParenType(InnerType);
1017 }
1018
1019 /// Build a new qualified name type.
1020 ///
1021 /// By default, builds a new ElaboratedType type from the keyword,
1022 /// the nested-name-specifier and the named type.
1023 /// Subclasses may override this routine to provide different behavior.
1024 QualType RebuildElaboratedType(SourceLocation KeywordLoc,
1025 ElaboratedTypeKeyword Keyword,
1026 NestedNameSpecifierLoc QualifierLoc,
1027 QualType Named) {
1028 return SemaRef.Context.getElaboratedType(Keyword,
1029 QualifierLoc.getNestedNameSpecifier(),
1030 Named);
1031 }
1032
1033 /// Build a new typename type that refers to a template-id.
1034 ///
1035 /// By default, builds a new DependentNameType type from the
1036 /// nested-name-specifier and the given type. Subclasses may override
1037 /// this routine to provide different behavior.
1038 QualType RebuildDependentTemplateSpecializationType(
1039 ElaboratedTypeKeyword Keyword,
1040 NestedNameSpecifierLoc QualifierLoc,
1041 SourceLocation TemplateKWLoc,
1042 const IdentifierInfo *Name,
1043 SourceLocation NameLoc,
1044 TemplateArgumentListInfo &Args,
1045 bool AllowInjectedClassName) {
1046 // Rebuild the template name.
1047 // TODO: avoid TemplateName abstraction
1048 CXXScopeSpec SS;
1049 SS.Adopt(QualifierLoc);
1050 TemplateName InstName = getDerived().RebuildTemplateName(
1051 SS, TemplateKWLoc, *Name, NameLoc, QualType(), nullptr,
1052 AllowInjectedClassName);
1053
1054 if (InstName.isNull())
1055 return QualType();
1056
1057 // If it's still dependent, make a dependent specialization.
1058 if (InstName.getAsDependentTemplateName())
1059 return SemaRef.Context.getDependentTemplateSpecializationType(Keyword,
1060 QualifierLoc.getNestedNameSpecifier(),
1061 Name,
1062 Args);
1063
1064 // Otherwise, make an elaborated type wrapping a non-dependent
1065 // specialization.
1066 QualType T =
1067 getDerived().RebuildTemplateSpecializationType(InstName, NameLoc, Args);
1068 if (T.isNull()) return QualType();
1069
1070 if (Keyword == ETK_None && QualifierLoc.getNestedNameSpecifier() == nullptr)
1071 return T;
1072
1073 return SemaRef.Context.getElaboratedType(Keyword,
1074 QualifierLoc.getNestedNameSpecifier(),
1075 T);
1076 }
1077
1078 /// Build a new typename type that refers to an identifier.
1079 ///
1080 /// By default, performs semantic analysis when building the typename type
1081 /// (or elaborated type). Subclasses may override this routine to provide
1082 /// different behavior.
1083 QualType RebuildDependentNameType(ElaboratedTypeKeyword Keyword,
1084 SourceLocation KeywordLoc,
1085 NestedNameSpecifierLoc QualifierLoc,
1086 const IdentifierInfo *Id,
1087 SourceLocation IdLoc,
1088 bool DeducedTSTContext) {
1089 CXXScopeSpec SS;
1090 SS.Adopt(QualifierLoc);
1091
1092 if (QualifierLoc.getNestedNameSpecifier()->isDependent()) {
1093 // If the name is still dependent, just build a new dependent name type.
1094 if (!SemaRef.computeDeclContext(SS))
1095 return SemaRef.Context.getDependentNameType(Keyword,
1096 QualifierLoc.getNestedNameSpecifier(),
1097 Id);
1098 }
1099
1100 if (Keyword == ETK_None || Keyword == ETK_Typename) {
1101 return SemaRef.CheckTypenameType(Keyword, KeywordLoc, QualifierLoc,
1102 *Id, IdLoc, DeducedTSTContext);
1103 }
1104
1105 TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForKeyword(Keyword);
1106
1107 // We had a dependent elaborated-type-specifier that has been transformed
1108 // into a non-dependent elaborated-type-specifier. Find the tag we're
1109 // referring to.
1110 LookupResult Result(SemaRef, Id, IdLoc, Sema::LookupTagName);
1111 DeclContext *DC = SemaRef.computeDeclContext(SS, false);
1112 if (!DC)
1113 return QualType();
1114
1115 if (SemaRef.RequireCompleteDeclContext(SS, DC))
1116 return QualType();
1117
1118 TagDecl *Tag = nullptr;
1119 SemaRef.LookupQualifiedName(Result, DC);
1120 switch (Result.getResultKind()) {
1121 case LookupResult::NotFound:
1122 case LookupResult::NotFoundInCurrentInstantiation:
1123 break;
1124
1125 case LookupResult::Found:
1126 Tag = Result.getAsSingle<TagDecl>();
1127 break;
1128
1129 case LookupResult::FoundOverloaded:
1130 case LookupResult::FoundUnresolvedValue:
1131 llvm_unreachable("Tag lookup cannot find non-tags")__builtin_unreachable();
1132
1133 case LookupResult::Ambiguous:
1134 // Let the LookupResult structure handle ambiguities.
1135 return QualType();
1136 }
1137
1138 if (!Tag) {
1139 // Check where the name exists but isn't a tag type and use that to emit
1140 // better diagnostics.
1141 LookupResult Result(SemaRef, Id, IdLoc, Sema::LookupTagName);
1142 SemaRef.LookupQualifiedName(Result, DC);
1143 switch (Result.getResultKind()) {
1144 case LookupResult::Found:
1145 case LookupResult::FoundOverloaded:
1146 case LookupResult::FoundUnresolvedValue: {
1147 NamedDecl *SomeDecl = Result.getRepresentativeDecl();
1148 Sema::NonTagKind NTK = SemaRef.getNonTagTypeDeclKind(SomeDecl, Kind);
1149 SemaRef.Diag(IdLoc, diag::err_tag_reference_non_tag) << SomeDecl
1150 << NTK << Kind;
1151 SemaRef.Diag(SomeDecl->getLocation(), diag::note_declared_at);
1152 break;
1153 }
1154 default:
1155 SemaRef.Diag(IdLoc, diag::err_not_tag_in_scope)
1156 << Kind << Id << DC << QualifierLoc.getSourceRange();
1157 break;
1158 }
1159 return QualType();
1160 }
1161
1162 if (!SemaRef.isAcceptableTagRedeclaration(Tag, Kind, /*isDefinition*/false,
1163 IdLoc, Id)) {
1164 SemaRef.Diag(KeywordLoc, diag::err_use_with_wrong_tag) << Id;
1165 SemaRef.Diag(Tag->getLocation(), diag::note_previous_use);
1166 return QualType();
1167 }
1168
1169 // Build the elaborated-type-specifier type.
1170 QualType T = SemaRef.Context.getTypeDeclType(Tag);
1171 return SemaRef.Context.getElaboratedType(Keyword,
1172 QualifierLoc.getNestedNameSpecifier(),
1173 T);
1174 }
1175
1176 /// Build a new pack expansion type.
1177 ///
1178 /// By default, builds a new PackExpansionType type from the given pattern.
1179 /// Subclasses may override this routine to provide different behavior.
1180 QualType RebuildPackExpansionType(QualType Pattern,
1181 SourceRange PatternRange,
1182 SourceLocation EllipsisLoc,
1183 Optional<unsigned> NumExpansions) {
1184 return getSema().CheckPackExpansion(Pattern, PatternRange, EllipsisLoc,
1185 NumExpansions);
1186 }
1187
1188 /// Build a new atomic type given its value type.
1189 ///
1190 /// By default, performs semantic analysis when building the atomic type.
1191 /// Subclasses may override this routine to provide different behavior.
1192 QualType RebuildAtomicType(QualType ValueType, SourceLocation KWLoc);
1193
1194 /// Build a new pipe type given its value type.
1195 QualType RebuildPipeType(QualType ValueType, SourceLocation KWLoc,
1196 bool isReadPipe);
1197
1198 /// Build an extended int given its value type.
1199 QualType RebuildExtIntType(bool IsUnsigned, unsigned NumBits,
1200 SourceLocation Loc);
1201
1202 /// Build a dependent extended int given its value type.
1203 QualType RebuildDependentExtIntType(bool IsUnsigned, Expr *NumBitsExpr,
1204 SourceLocation Loc);
1205
1206 /// Build a new template name given a nested name specifier, a flag
1207 /// indicating whether the "template" keyword was provided, and the template
1208 /// that the template name refers to.
1209 ///
1210 /// By default, builds the new template name directly. Subclasses may override
1211 /// this routine to provide different behavior.
1212 TemplateName RebuildTemplateName(CXXScopeSpec &SS,
1213 bool TemplateKW,
1214 TemplateDecl *Template);
1215
1216 /// Build a new template name given a nested name specifier and the
1217 /// name that is referred to as a template.
1218 ///
1219 /// By default, performs semantic analysis to determine whether the name can
1220 /// be resolved to a specific template, then builds the appropriate kind of
1221 /// template name. Subclasses may override this routine to provide different
1222 /// behavior.
1223 TemplateName RebuildTemplateName(CXXScopeSpec &SS,
1224 SourceLocation TemplateKWLoc,
1225 const IdentifierInfo &Name,
1226 SourceLocation NameLoc, QualType ObjectType,
1227 NamedDecl *FirstQualifierInScope,
1228 bool AllowInjectedClassName);
1229
1230 /// Build a new template name given a nested name specifier and the
1231 /// overloaded operator name that is referred to as a template.
1232 ///
1233 /// By default, performs semantic analysis to determine whether the name can
1234 /// be resolved to a specific template, then builds the appropriate kind of
1235 /// template name. Subclasses may override this routine to provide different
1236 /// behavior.
1237 TemplateName RebuildTemplateName(CXXScopeSpec &SS,
1238 SourceLocation TemplateKWLoc,
1239 OverloadedOperatorKind Operator,
1240 SourceLocation NameLoc, QualType ObjectType,
1241 bool AllowInjectedClassName);
1242
1243 /// Build a new template name given a template template parameter pack
1244 /// and the
1245 ///
1246 /// By default, performs semantic analysis to determine whether the name can
1247 /// be resolved to a specific template, then builds the appropriate kind of
1248 /// template name. Subclasses may override this routine to provide different
1249 /// behavior.
1250 TemplateName RebuildTemplateName(TemplateTemplateParmDecl *Param,
1251 const TemplateArgument &ArgPack) {
1252 return getSema().Context.getSubstTemplateTemplateParmPack(Param, ArgPack);
1253 }
1254
1255 /// Build a new compound statement.
1256 ///
1257 /// By default, performs semantic analysis to build the new statement.
1258 /// Subclasses may override this routine to provide different behavior.
1259 StmtResult RebuildCompoundStmt(SourceLocation LBraceLoc,
1260 MultiStmtArg Statements,
1261 SourceLocation RBraceLoc,
1262 bool IsStmtExpr) {
1263 return getSema().ActOnCompoundStmt(LBraceLoc, RBraceLoc, Statements,
1264 IsStmtExpr);
1265 }
1266
1267 /// Build a new case statement.
1268 ///
1269 /// By default, performs semantic analysis to build the new statement.
1270 /// Subclasses may override this routine to provide different behavior.
1271 StmtResult RebuildCaseStmt(SourceLocation CaseLoc,
1272 Expr *LHS,
1273 SourceLocation EllipsisLoc,
1274 Expr *RHS,
1275 SourceLocation ColonLoc) {
1276 return getSema().ActOnCaseStmt(CaseLoc, LHS, EllipsisLoc, RHS,
1277 ColonLoc);
1278 }
1279
1280 /// Attach the body to a new case statement.
1281 ///
1282 /// By default, performs semantic analysis to build the new statement.
1283 /// Subclasses may override this routine to provide different behavior.
1284 StmtResult RebuildCaseStmtBody(Stmt *S, Stmt *Body) {
1285 getSema().ActOnCaseStmtBody(S, Body);
1286 return S;
1287 }
1288
1289 /// Build a new default statement.
1290 ///
1291 /// By default, performs semantic analysis to build the new statement.
1292 /// Subclasses may override this routine to provide different behavior.
1293 StmtResult RebuildDefaultStmt(SourceLocation DefaultLoc,
1294 SourceLocation ColonLoc,
1295 Stmt *SubStmt) {
1296 return getSema().ActOnDefaultStmt(DefaultLoc, ColonLoc, SubStmt,
1297 /*CurScope=*/nullptr);
1298 }
1299
1300 /// Build a new label statement.
1301 ///
1302 /// By default, performs semantic analysis to build the new statement.
1303 /// Subclasses may override this routine to provide different behavior.
1304 StmtResult RebuildLabelStmt(SourceLocation IdentLoc, LabelDecl *L,
1305 SourceLocation ColonLoc, Stmt *SubStmt) {
1306 return SemaRef.ActOnLabelStmt(IdentLoc, L, ColonLoc, SubStmt);
1307 }
1308
1309 /// Build a new attributed statement.
1310 ///
1311 /// By default, performs semantic analysis to build the new statement.
1312 /// Subclasses may override this routine to provide different behavior.
1313 StmtResult RebuildAttributedStmt(SourceLocation AttrLoc,
1314 ArrayRef<const Attr *> Attrs,
1315 Stmt *SubStmt) {
1316 return SemaRef.BuildAttributedStmt(AttrLoc, Attrs, SubStmt);
1317 }
1318
1319 /// Build a new "if" statement.
1320 ///
1321 /// By default, performs semantic analysis to build the new statement.
1322 /// Subclasses may override this routine to provide different behavior.
1323 StmtResult RebuildIfStmt(SourceLocation IfLoc, bool IsConstexpr,
1324 SourceLocation LParenLoc, Sema::ConditionResult Cond,
1325 SourceLocation RParenLoc, Stmt *Init, Stmt *Then,
1326 SourceLocation ElseLoc, Stmt *Else) {
1327 return getSema().ActOnIfStmt(IfLoc, IsConstexpr, LParenLoc, Init, Cond,
1328 RParenLoc, Then, ElseLoc, Else);
1329 }
1330
1331 /// Start building a new switch statement.
1332 ///
1333 /// By default, performs semantic analysis to build the new statement.
1334 /// Subclasses may override this routine to provide different behavior.
1335 StmtResult RebuildSwitchStmtStart(SourceLocation SwitchLoc,
1336 SourceLocation LParenLoc, Stmt *Init,
1337 Sema::ConditionResult Cond,
1338 SourceLocation RParenLoc) {
1339 return getSema().ActOnStartOfSwitchStmt(SwitchLoc, LParenLoc, Init, Cond,
1340 RParenLoc);
1341 }
1342
1343 /// Attach the body to the switch statement.
1344 ///
1345 /// By default, performs semantic analysis to build the new statement.
1346 /// Subclasses may override this routine to provide different behavior.
1347 StmtResult RebuildSwitchStmtBody(SourceLocation SwitchLoc,
1348 Stmt *Switch, Stmt *Body) {
1349 return getSema().ActOnFinishSwitchStmt(SwitchLoc, Switch, Body);
1350 }
1351
1352 /// Build a new while statement.
1353 ///
1354 /// By default, performs semantic analysis to build the new statement.
1355 /// Subclasses may override this routine to provide different behavior.
1356 StmtResult RebuildWhileStmt(SourceLocation WhileLoc, SourceLocation LParenLoc,
1357 Sema::ConditionResult Cond,
1358 SourceLocation RParenLoc, Stmt *Body) {
1359 return getSema().ActOnWhileStmt(WhileLoc, LParenLoc, Cond, RParenLoc, Body);
1360 }
1361
1362 /// Build a new do-while statement.
1363 ///
1364 /// By default, performs semantic analysis to build the new statement.
1365 /// Subclasses may override this routine to provide different behavior.
1366 StmtResult RebuildDoStmt(SourceLocation DoLoc, Stmt *Body,
1367 SourceLocation WhileLoc, SourceLocation LParenLoc,
1368 Expr *Cond, SourceLocation RParenLoc) {
1369 return getSema().ActOnDoStmt(DoLoc, Body, WhileLoc, LParenLoc,
1370 Cond, RParenLoc);
1371 }
1372
1373 /// Build a new for statement.
1374 ///
1375 /// By default, performs semantic analysis to build the new statement.
1376 /// Subclasses may override this routine to provide different behavior.
1377 StmtResult RebuildForStmt(SourceLocation ForLoc, SourceLocation LParenLoc,
1378 Stmt *Init, Sema::ConditionResult Cond,
1379 Sema::FullExprArg Inc, SourceLocation RParenLoc,
1380 Stmt *Body) {
1381 return getSema().ActOnForStmt(ForLoc, LParenLoc, Init, Cond,
1382 Inc, RParenLoc, Body);
1383 }
1384
1385 /// Build a new goto statement.
1386 ///
1387 /// By default, performs semantic analysis to build the new statement.
1388 /// Subclasses may override this routine to provide different behavior.
1389 StmtResult RebuildGotoStmt(SourceLocation GotoLoc, SourceLocation LabelLoc,
1390 LabelDecl *Label) {
1391 return getSema().ActOnGotoStmt(GotoLoc, LabelLoc, Label);
1392 }
1393
1394 /// Build a new indirect goto statement.
1395 ///
1396 /// By default, performs semantic analysis to build the new statement.
1397 /// Subclasses may override this routine to provide different behavior.
1398 StmtResult RebuildIndirectGotoStmt(SourceLocation GotoLoc,
1399 SourceLocation StarLoc,
1400 Expr *Target) {
1401 return getSema().ActOnIndirectGotoStmt(GotoLoc, StarLoc, Target);
1402 }
1403
1404 /// Build a new return statement.
1405 ///
1406 /// By default, performs semantic analysis to build the new statement.
1407 /// Subclasses may override this routine to provide different behavior.
1408 StmtResult RebuildReturnStmt(SourceLocation ReturnLoc, Expr *Result) {
1409 return getSema().BuildReturnStmt(ReturnLoc, Result);
1410 }
1411
1412 /// Build a new declaration statement.
1413 ///
1414 /// By default, performs semantic analysis to build the new statement.
1415 /// Subclasses may override this routine to provide different behavior.
1416 StmtResult RebuildDeclStmt(MutableArrayRef<Decl *> Decls,
1417 SourceLocation StartLoc, SourceLocation EndLoc) {
1418 Sema::DeclGroupPtrTy DG = getSema().BuildDeclaratorGroup(Decls);
1419 return getSema().ActOnDeclStmt(DG, StartLoc, EndLoc);
1420 }
1421
1422 /// Build a new inline asm statement.
1423 ///
1424 /// By default, performs semantic analysis to build the new statement.
1425 /// Subclasses may override this routine to provide different behavior.
1426 StmtResult RebuildGCCAsmStmt(SourceLocation AsmLoc, bool IsSimple,
1427 bool IsVolatile, unsigned NumOutputs,
1428 unsigned NumInputs, IdentifierInfo **Names,
1429 MultiExprArg Constraints, MultiExprArg Exprs,
1430 Expr *AsmString, MultiExprArg Clobbers,
1431 unsigned NumLabels,
1432 SourceLocation RParenLoc) {
1433 return getSema().ActOnGCCAsmStmt(AsmLoc, IsSimple, IsVolatile, NumOutputs,
1434 NumInputs, Names, Constraints, Exprs,
1435 AsmString, Clobbers, NumLabels, RParenLoc);
1436 }
1437
1438 /// Build a new MS style inline asm statement.
1439 ///
1440 /// By default, performs semantic analysis to build the new statement.
1441 /// Subclasses may override this routine to provide different behavior.
1442 StmtResult RebuildMSAsmStmt(SourceLocation AsmLoc, SourceLocation LBraceLoc,
1443 ArrayRef<Token> AsmToks,
1444 StringRef AsmString,
1445 unsigned NumOutputs, unsigned NumInputs,
1446 ArrayRef<StringRef> Constraints,
1447 ArrayRef<StringRef> Clobbers,
1448 ArrayRef<Expr*> Exprs,
1449 SourceLocation EndLoc) {
1450 return getSema().ActOnMSAsmStmt(AsmLoc, LBraceLoc, AsmToks, AsmString,
1451 NumOutputs, NumInputs,
1452 Constraints, Clobbers, Exprs, EndLoc);
1453 }
1454
1455 /// Build a new co_return statement.
1456 ///
1457 /// By default, performs semantic analysis to build the new statement.
1458 /// Subclasses may override this routine to provide different behavior.
1459 StmtResult RebuildCoreturnStmt(SourceLocation CoreturnLoc, Expr *Result,
1460 bool IsImplicit) {
1461 return getSema().BuildCoreturnStmt(CoreturnLoc, Result, IsImplicit);
1462 }
1463
1464 /// Build a new co_await expression.
1465 ///
1466 /// By default, performs semantic analysis to build the new expression.
1467 /// Subclasses may override this routine to provide different behavior.
1468 ExprResult RebuildCoawaitExpr(SourceLocation CoawaitLoc, Expr *Result,
1469 bool IsImplicit) {
1470 return getSema().BuildResolvedCoawaitExpr(CoawaitLoc, Result, IsImplicit);
1471 }
1472
1473 /// Build a new co_await expression.
1474 ///
1475 /// By default, performs semantic analysis to build the new expression.
1476 /// Subclasses may override this routine to provide different behavior.
1477 ExprResult RebuildDependentCoawaitExpr(SourceLocation CoawaitLoc,
1478 Expr *Result,
1479 UnresolvedLookupExpr *Lookup) {
1480 return getSema().BuildUnresolvedCoawaitExpr(CoawaitLoc, Result, Lookup);
1481 }
1482
1483 /// Build a new co_yield expression.
1484 ///
1485 /// By default, performs semantic analysis to build the new expression.
1486 /// Subclasses may override this routine to provide different behavior.
1487 ExprResult RebuildCoyieldExpr(SourceLocation CoyieldLoc, Expr *Result) {
1488 return getSema().BuildCoyieldExpr(CoyieldLoc, Result);
1489 }
1490
1491 StmtResult RebuildCoroutineBodyStmt(CoroutineBodyStmt::CtorArgs Args) {
1492 return getSema().BuildCoroutineBodyStmt(Args);
1493 }
1494
1495 /// Build a new Objective-C \@try statement.
1496 ///
1497 /// By default, performs semantic analysis to build the new statement.
1498 /// Subclasses may override this routine to provide different behavior.
1499 StmtResult RebuildObjCAtTryStmt(SourceLocation AtLoc,
1500 Stmt *TryBody,
1501 MultiStmtArg CatchStmts,
1502 Stmt *Finally) {
1503 return getSema().ActOnObjCAtTryStmt(AtLoc, TryBody, CatchStmts,
1504 Finally);
1505 }
1506
1507 /// Rebuild an Objective-C exception declaration.
1508 ///
1509 /// By default, performs semantic analysis to build the new declaration.
1510 /// Subclasses may override this routine to provide different behavior.
1511 VarDecl *RebuildObjCExceptionDecl(VarDecl *ExceptionDecl,
1512 TypeSourceInfo *TInfo, QualType T) {
1513 return getSema().BuildObjCExceptionDecl(TInfo, T,
1514 ExceptionDecl->getInnerLocStart(),
1515 ExceptionDecl->getLocation(),
1516 ExceptionDecl->getIdentifier());
1517 }
1518
1519 /// Build a new Objective-C \@catch statement.
1520 ///
1521 /// By default, performs semantic analysis to build the new statement.
1522 /// Subclasses may override this routine to provide different behavior.
1523 StmtResult RebuildObjCAtCatchStmt(SourceLocation AtLoc,
1524 SourceLocation RParenLoc,
1525 VarDecl *Var,
1526 Stmt *Body) {
1527 return getSema().ActOnObjCAtCatchStmt(AtLoc, RParenLoc,
1528 Var, Body);
1529 }
1530
1531 /// Build a new Objective-C \@finally statement.
1532 ///
1533 /// By default, performs semantic analysis to build the new statement.
1534 /// Subclasses may override this routine to provide different behavior.
1535 StmtResult RebuildObjCAtFinallyStmt(SourceLocation AtLoc,
1536 Stmt *Body) {
1537 return getSema().ActOnObjCAtFinallyStmt(AtLoc, Body);
1538 }
1539
1540 /// Build a new Objective-C \@throw statement.
1541 ///
1542 /// By default, performs semantic analysis to build the new statement.
1543 /// Subclasses may override this routine to provide different behavior.
1544 StmtResult RebuildObjCAtThrowStmt(SourceLocation AtLoc,
1545 Expr *Operand) {
1546 return getSema().BuildObjCAtThrowStmt(AtLoc, Operand);
1547 }
1548
1549 /// Build a new OpenMP Canonical loop.
1550 ///
1551 /// Ensures that the outermost loop in @p LoopStmt is wrapped by a
1552 /// OMPCanonicalLoop.
1553 StmtResult RebuildOMPCanonicalLoop(Stmt *LoopStmt) {
1554 return getSema().ActOnOpenMPCanonicalLoop(LoopStmt);
1555 }
1556
1557 /// Build a new OpenMP executable directive.
1558 ///
1559 /// By default, performs semantic analysis to build the new statement.
1560 /// Subclasses may override this routine to provide different behavior.
1561 StmtResult RebuildOMPExecutableDirective(OpenMPDirectiveKind Kind,
1562 DeclarationNameInfo DirName,
1563 OpenMPDirectiveKind CancelRegion,
1564 ArrayRef<OMPClause *> Clauses,
1565 Stmt *AStmt, SourceLocation StartLoc,
1566 SourceLocation EndLoc) {
1567 return getSema().ActOnOpenMPExecutableDirective(
1568 Kind, DirName, CancelRegion, Clauses, AStmt, StartLoc, EndLoc);
1569 }
1570
1571 /// Build a new OpenMP 'if' clause.
1572 ///
1573 /// By default, performs semantic analysis to build the new OpenMP clause.
1574 /// Subclasses may override this routine to provide different behavior.
1575 OMPClause *RebuildOMPIfClause(OpenMPDirectiveKind NameModifier,
1576 Expr *Condition, SourceLocation StartLoc,
1577 SourceLocation LParenLoc,
1578 SourceLocation NameModifierLoc,
1579 SourceLocation ColonLoc,
1580 SourceLocation EndLoc) {
1581 return getSema().ActOnOpenMPIfClause(NameModifier, Condition, StartLoc,
1582 LParenLoc, NameModifierLoc, ColonLoc,
1583 EndLoc);
1584 }
1585
1586 /// Build a new OpenMP 'final' clause.
1587 ///
1588 /// By default, performs semantic analysis to build the new OpenMP clause.
1589 /// Subclasses may override this routine to provide different behavior.
1590 OMPClause *RebuildOMPFinalClause(Expr *Condition, SourceLocation StartLoc,
1591 SourceLocation LParenLoc,
1592 SourceLocation EndLoc) {
1593 return getSema().ActOnOpenMPFinalClause(Condition, StartLoc, LParenLoc,
1594 EndLoc);
1595 }
1596
1597 /// Build a new OpenMP 'num_threads' clause.
1598 ///
1599 /// By default, performs semantic analysis to build the new OpenMP clause.
1600 /// Subclasses may override this routine to provide different behavior.
1601 OMPClause *RebuildOMPNumThreadsClause(Expr *NumThreads,
1602 SourceLocation StartLoc,
1603 SourceLocation LParenLoc,
1604 SourceLocation EndLoc) {
1605 return getSema().ActOnOpenMPNumThreadsClause(NumThreads, StartLoc,
1606 LParenLoc, EndLoc);
1607 }
1608
1609 /// Build a new OpenMP 'safelen' clause.
1610 ///
1611 /// By default, performs semantic analysis to build the new OpenMP clause.
1612 /// Subclasses may override this routine to provide different behavior.
1613 OMPClause *RebuildOMPSafelenClause(Expr *Len, SourceLocation StartLoc,
1614 SourceLocation LParenLoc,
1615 SourceLocation EndLoc) {
1616 return getSema().ActOnOpenMPSafelenClause(Len, StartLoc, LParenLoc, EndLoc);
1617 }
1618
1619 /// Build a new OpenMP 'simdlen' clause.
1620 ///
1621 /// By default, performs semantic analysis to build the new OpenMP clause.
1622 /// Subclasses may override this routine to provide different behavior.
1623 OMPClause *RebuildOMPSimdlenClause(Expr *Len, SourceLocation StartLoc,
1624 SourceLocation LParenLoc,
1625 SourceLocation EndLoc) {
1626 return getSema().ActOnOpenMPSimdlenClause(Len, StartLoc, LParenLoc, EndLoc);
1627 }
1628
1629 OMPClause *RebuildOMPSizesClause(ArrayRef<Expr *> Sizes,
1630 SourceLocation StartLoc,
1631 SourceLocation LParenLoc,
1632 SourceLocation EndLoc) {
1633 return getSema().ActOnOpenMPSizesClause(Sizes, StartLoc, LParenLoc, EndLoc);
1634 }
1635
1636 /// Build a new OpenMP 'full' clause.
1637 OMPClause *RebuildOMPFullClause(SourceLocation StartLoc,
1638 SourceLocation EndLoc) {
1639 return getSema().ActOnOpenMPFullClause(StartLoc, EndLoc);
1640 }
1641
1642 /// Build a new OpenMP 'partial' clause.
1643 OMPClause *RebuildOMPPartialClause(Expr *Factor, SourceLocation StartLoc,
1644 SourceLocation LParenLoc,
1645 SourceLocation EndLoc) {
1646 return getSema().ActOnOpenMPPartialClause(Factor, StartLoc, LParenLoc,
1647 EndLoc);
1648 }
1649
1650 /// Build a new OpenMP 'allocator' 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 *RebuildOMPAllocatorClause(Expr *A, SourceLocation StartLoc,
1655 SourceLocation LParenLoc,
1656 SourceLocation EndLoc) {
1657 return getSema().ActOnOpenMPAllocatorClause(A, StartLoc, LParenLoc, EndLoc);
1658 }
1659
1660 /// Build a new OpenMP 'collapse' clause.
1661 ///
1662 /// By default, performs semantic analysis to build the new OpenMP clause.
1663 /// Subclasses may override this routine to provide different behavior.
1664 OMPClause *RebuildOMPCollapseClause(Expr *Num, SourceLocation StartLoc,
1665 SourceLocation LParenLoc,
1666 SourceLocation EndLoc) {
1667 return getSema().ActOnOpenMPCollapseClause(Num, StartLoc, LParenLoc,
1668 EndLoc);
1669 }
1670
1671 /// Build a new OpenMP 'default' clause.
1672 ///
1673 /// By default, performs semantic analysis to build the new OpenMP clause.
1674 /// Subclasses may override this routine to provide different behavior.
1675 OMPClause *RebuildOMPDefaultClause(DefaultKind Kind, SourceLocation KindKwLoc,
1676 SourceLocation StartLoc,
1677 SourceLocation LParenLoc,
1678 SourceLocation EndLoc) {
1679 return getSema().ActOnOpenMPDefaultClause(Kind, KindKwLoc,
1680 StartLoc, LParenLoc, EndLoc);
1681 }
1682
1683 /// Build a new OpenMP 'proc_bind' clause.
1684 ///
1685 /// By default, performs semantic analysis to build the new OpenMP clause.
1686 /// Subclasses may override this routine to provide different behavior.
1687 OMPClause *RebuildOMPProcBindClause(ProcBindKind Kind,
1688 SourceLocation KindKwLoc,
1689 SourceLocation StartLoc,
1690 SourceLocation LParenLoc,
1691 SourceLocation EndLoc) {
1692 return getSema().ActOnOpenMPProcBindClause(Kind, KindKwLoc,
1693 StartLoc, LParenLoc, EndLoc);
1694 }
1695
1696 /// Build a new OpenMP 'schedule' clause.
1697 ///
1698 /// By default, performs semantic analysis to build the new OpenMP clause.
1699 /// Subclasses may override this routine to provide different behavior.
1700 OMPClause *RebuildOMPScheduleClause(
1701 OpenMPScheduleClauseModifier M1, OpenMPScheduleClauseModifier M2,
1702 OpenMPScheduleClauseKind Kind, Expr *ChunkSize, SourceLocation StartLoc,
1703 SourceLocation LParenLoc, SourceLocation M1Loc, SourceLocation M2Loc,
1704 SourceLocation KindLoc, SourceLocation CommaLoc, SourceLocation EndLoc) {
1705 return getSema().ActOnOpenMPScheduleClause(
1706 M1, M2, Kind, ChunkSize, StartLoc, LParenLoc, M1Loc, M2Loc, KindLoc,
1707 CommaLoc, EndLoc);
1708 }
1709
1710 /// Build a new OpenMP 'ordered' clause.
1711 ///
1712 /// By default, performs semantic analysis to build the new OpenMP clause.
1713 /// Subclasses may override this routine to provide different behavior.
1714 OMPClause *RebuildOMPOrderedClause(SourceLocation StartLoc,
1715 SourceLocation EndLoc,
1716 SourceLocation LParenLoc, Expr *Num) {
1717 return getSema().ActOnOpenMPOrderedClause(StartLoc, EndLoc, LParenLoc, Num);
1718 }
1719
1720 /// Build a new OpenMP 'private' clause.
1721 ///
1722 /// By default, performs semantic analysis to build the new OpenMP clause.
1723 /// Subclasses may override this routine to provide different behavior.
1724 OMPClause *RebuildOMPPrivateClause(ArrayRef<Expr *> VarList,
1725 SourceLocation StartLoc,
1726 SourceLocation LParenLoc,
1727 SourceLocation EndLoc) {
1728 return getSema().ActOnOpenMPPrivateClause(VarList, StartLoc, LParenLoc,
1729 EndLoc);
1730 }
1731
1732 /// Build a new OpenMP 'firstprivate' clause.
1733 ///
1734 /// By default, performs semantic analysis to build the new OpenMP clause.
1735 /// Subclasses may override this routine to provide different behavior.
1736 OMPClause *RebuildOMPFirstprivateClause(ArrayRef<Expr *> VarList,
1737 SourceLocation StartLoc,
1738 SourceLocation LParenLoc,
1739 SourceLocation EndLoc) {
1740 return getSema().ActOnOpenMPFirstprivateClause(VarList, StartLoc, LParenLoc,
1741 EndLoc);
1742 }
1743
1744 /// Build a new OpenMP 'lastprivate' clause.
1745 ///
1746 /// By default, performs semantic analysis to build the new OpenMP clause.
1747 /// Subclasses may override this routine to provide different behavior.
1748 OMPClause *RebuildOMPLastprivateClause(ArrayRef<Expr *> VarList,
1749 OpenMPLastprivateModifier LPKind,
1750 SourceLocation LPKindLoc,
1751 SourceLocation ColonLoc,
1752 SourceLocation StartLoc,
1753 SourceLocation LParenLoc,
1754 SourceLocation EndLoc) {
1755 return getSema().ActOnOpenMPLastprivateClause(
1756 VarList, LPKind, LPKindLoc, ColonLoc, StartLoc, LParenLoc, EndLoc);
1757 }
1758
1759 /// Build a new OpenMP 'shared' clause.
1760 ///
1761 /// By default, performs semantic analysis to build the new OpenMP clause.
1762 /// Subclasses may override this routine to provide different behavior.
1763 OMPClause *RebuildOMPSharedClause(ArrayRef<Expr *> VarList,
1764 SourceLocation StartLoc,
1765 SourceLocation LParenLoc,
1766 SourceLocation EndLoc) {
1767 return getSema().ActOnOpenMPSharedClause(VarList, StartLoc, LParenLoc,
1768 EndLoc);
1769 }
1770
1771 /// Build a new OpenMP 'reduction' clause.
1772 ///
1773 /// By default, performs semantic analysis to build the new statement.
1774 /// Subclasses may override this routine to provide different behavior.
1775 OMPClause *RebuildOMPReductionClause(
1776 ArrayRef<Expr *> VarList, OpenMPReductionClauseModifier Modifier,
1777 SourceLocation StartLoc, SourceLocation LParenLoc,
1778 SourceLocation ModifierLoc, SourceLocation ColonLoc,
1779 SourceLocation EndLoc, CXXScopeSpec &ReductionIdScopeSpec,
1780 const DeclarationNameInfo &ReductionId,
1781 ArrayRef<Expr *> UnresolvedReductions) {
1782 return getSema().ActOnOpenMPReductionClause(
1783 VarList, Modifier, StartLoc, LParenLoc, ModifierLoc, ColonLoc, EndLoc,
1784 ReductionIdScopeSpec, ReductionId, UnresolvedReductions);
1785 }
1786
1787 /// Build a new OpenMP 'task_reduction' clause.
1788 ///
1789 /// By default, performs semantic analysis to build the new statement.
1790 /// Subclasses may override this routine to provide different behavior.
1791 OMPClause *RebuildOMPTaskReductionClause(
1792 ArrayRef<Expr *> VarList, SourceLocation StartLoc,
1793 SourceLocation LParenLoc, SourceLocation ColonLoc, SourceLocation EndLoc,
1794 CXXScopeSpec &ReductionIdScopeSpec,
1795 const DeclarationNameInfo &ReductionId,
1796 ArrayRef<Expr *> UnresolvedReductions) {
1797 return getSema().ActOnOpenMPTaskReductionClause(
1798 VarList, StartLoc, LParenLoc, ColonLoc, EndLoc, ReductionIdScopeSpec,
1799 ReductionId, UnresolvedReductions);
1800 }
1801
1802 /// Build a new OpenMP 'in_reduction' clause.
1803 ///
1804 /// By default, performs semantic analysis to build the new statement.
1805 /// Subclasses may override this routine to provide different behavior.
1806 OMPClause *
1807 RebuildOMPInReductionClause(ArrayRef<Expr *> VarList, SourceLocation StartLoc,
1808 SourceLocation LParenLoc, SourceLocation ColonLoc,
1809 SourceLocation EndLoc,
1810 CXXScopeSpec &ReductionIdScopeSpec,
1811 const DeclarationNameInfo &ReductionId,
1812 ArrayRef<Expr *> UnresolvedReductions) {
1813 return getSema().ActOnOpenMPInReductionClause(
1814 VarList, StartLoc, LParenLoc, ColonLoc, EndLoc, ReductionIdScopeSpec,
1815 ReductionId, UnresolvedReductions);
1816 }
1817
1818 /// Build a new OpenMP 'linear' clause.
1819 ///
1820 /// By default, performs semantic analysis to build the new OpenMP clause.
1821 /// Subclasses may override this routine to provide different behavior.
1822 OMPClause *RebuildOMPLinearClause(ArrayRef<Expr *> VarList, Expr *Step,
1823 SourceLocation StartLoc,
1824 SourceLocation LParenLoc,
1825 OpenMPLinearClauseKind Modifier,
1826 SourceLocation ModifierLoc,
1827 SourceLocation ColonLoc,
1828 SourceLocation EndLoc) {
1829 return getSema().ActOnOpenMPLinearClause(VarList, Step, StartLoc, LParenLoc,
1830 Modifier, ModifierLoc, ColonLoc,
1831 EndLoc);
1832 }
1833
1834 /// Build a new OpenMP 'aligned' clause.
1835 ///
1836 /// By default, performs semantic analysis to build the new OpenMP clause.
1837 /// Subclasses may override this routine to provide different behavior.
1838 OMPClause *RebuildOMPAlignedClause(ArrayRef<Expr *> VarList, Expr *Alignment,
1839 SourceLocation StartLoc,
1840 SourceLocation LParenLoc,
1841 SourceLocation ColonLoc,
1842 SourceLocation EndLoc) {
1843 return getSema().ActOnOpenMPAlignedClause(VarList, Alignment, StartLoc,
1844 LParenLoc, ColonLoc, EndLoc);
1845 }
1846
1847 /// Build a new OpenMP 'copyin' clause.
1848 ///
1849 /// By default, performs semantic analysis to build the new OpenMP clause.
1850 /// Subclasses may override this routine to provide different behavior.
1851 OMPClause *RebuildOMPCopyinClause(ArrayRef<Expr *> VarList,
1852 SourceLocation StartLoc,
1853 SourceLocation LParenLoc,
1854 SourceLocation EndLoc) {
1855 return getSema().ActOnOpenMPCopyinClause(VarList, StartLoc, LParenLoc,
1856 EndLoc);
1857 }
1858
1859 /// Build a new OpenMP 'copyprivate' clause.
1860 ///
1861 /// By default, performs semantic analysis to build the new OpenMP clause.
1862 /// Subclasses may override this routine to provide different behavior.
1863 OMPClause *RebuildOMPCopyprivateClause(ArrayRef<Expr *> VarList,
1864 SourceLocation StartLoc,
1865 SourceLocation LParenLoc,
1866 SourceLocation EndLoc) {
1867 return getSema().ActOnOpenMPCopyprivateClause(VarList, StartLoc, LParenLoc,
1868 EndLoc);
1869 }
1870
1871 /// Build a new OpenMP 'flush' pseudo clause.
1872 ///
1873 /// By default, performs semantic analysis to build the new OpenMP clause.
1874 /// Subclasses may override this routine to provide different behavior.
1875 OMPClause *RebuildOMPFlushClause(ArrayRef<Expr *> VarList,
1876 SourceLocation StartLoc,
1877 SourceLocation LParenLoc,
1878 SourceLocation EndLoc) {
1879 return getSema().ActOnOpenMPFlushClause(VarList, StartLoc, LParenLoc,
1880 EndLoc);
1881 }
1882
1883 /// Build a new OpenMP 'depobj' pseudo clause.
1884 ///
1885 /// By default, performs semantic analysis to build the new OpenMP clause.
1886 /// Subclasses may override this routine to provide different behavior.
1887 OMPClause *RebuildOMPDepobjClause(Expr *Depobj, SourceLocation StartLoc,
1888 SourceLocation LParenLoc,
1889 SourceLocation EndLoc) {
1890 return getSema().ActOnOpenMPDepobjClause(Depobj, StartLoc, LParenLoc,
1891 EndLoc);
1892 }
1893
1894 /// Build a new OpenMP 'depend' pseudo clause.
1895 ///
1896 /// By default, performs semantic analysis to build the new OpenMP clause.
1897 /// Subclasses may override this routine to provide different behavior.
1898 OMPClause *
1899 RebuildOMPDependClause(Expr *DepModifier, OpenMPDependClauseKind DepKind,
1900 SourceLocation DepLoc, SourceLocation ColonLoc,
1901 ArrayRef<Expr *> VarList, SourceLocation StartLoc,
1902 SourceLocation LParenLoc, SourceLocation EndLoc) {
1903 return getSema().ActOnOpenMPDependClause(DepModifier, DepKind, DepLoc,
1904 ColonLoc, VarList, StartLoc,
1905 LParenLoc, EndLoc);
1906 }
1907
1908 /// Build a new OpenMP 'device' clause.
1909 ///
1910 /// By default, performs semantic analysis to build the new statement.
1911 /// Subclasses may override this routine to provide different behavior.
1912 OMPClause *RebuildOMPDeviceClause(OpenMPDeviceClauseModifier Modifier,
1913 Expr *Device, SourceLocation StartLoc,
1914 SourceLocation LParenLoc,
1915 SourceLocation ModifierLoc,
1916 SourceLocation EndLoc) {
1917 return getSema().ActOnOpenMPDeviceClause(Modifier, Device, StartLoc,
1918 LParenLoc, ModifierLoc, EndLoc);
1919 }
1920
1921 /// Build a new OpenMP 'map' clause.
1922 ///
1923 /// By default, performs semantic analysis to build the new OpenMP clause.
1924 /// Subclasses may override this routine to provide different behavior.
1925 OMPClause *RebuildOMPMapClause(
1926 ArrayRef<OpenMPMapModifierKind> MapTypeModifiers,
1927 ArrayRef<SourceLocation> MapTypeModifiersLoc,
1928 CXXScopeSpec MapperIdScopeSpec, DeclarationNameInfo MapperId,
1929 OpenMPMapClauseKind MapType, bool IsMapTypeImplicit,
1930 SourceLocation MapLoc, SourceLocation ColonLoc, ArrayRef<Expr *> VarList,
1931 const OMPVarListLocTy &Locs, ArrayRef<Expr *> UnresolvedMappers) {
1932 return getSema().ActOnOpenMPMapClause(
1933 MapTypeModifiers, MapTypeModifiersLoc, MapperIdScopeSpec, MapperId,
1934 MapType, IsMapTypeImplicit, MapLoc, ColonLoc, VarList, Locs,
1935 /*NoDiagnose=*/false, UnresolvedMappers);
1936 }
1937
1938 /// Build a new OpenMP 'allocate' clause.
1939 ///
1940 /// By default, performs semantic analysis to build the new OpenMP clause.
1941 /// Subclasses may override this routine to provide different behavior.
1942 OMPClause *RebuildOMPAllocateClause(Expr *Allocate, ArrayRef<Expr *> VarList,
1943 SourceLocation StartLoc,
1944 SourceLocation LParenLoc,
1945 SourceLocation ColonLoc,
1946 SourceLocation EndLoc) {
1947 return getSema().ActOnOpenMPAllocateClause(Allocate, VarList, StartLoc,
1948 LParenLoc, ColonLoc, EndLoc);
1949 }
1950
1951 /// Build a new OpenMP 'num_teams' clause.
1952 ///
1953 /// By default, performs semantic analysis to build the new statement.
1954 /// Subclasses may override this routine to provide different behavior.
1955 OMPClause *RebuildOMPNumTeamsClause(Expr *NumTeams, SourceLocation StartLoc,
1956 SourceLocation LParenLoc,
1957 SourceLocation EndLoc) {
1958 return getSema().ActOnOpenMPNumTeamsClause(NumTeams, StartLoc, LParenLoc,
1959 EndLoc);
1960 }
1961
1962 /// Build a new OpenMP 'thread_limit' clause.
1963 ///
1964 /// By default, performs semantic analysis to build the new statement.
1965 /// Subclasses may override this routine to provide different behavior.
1966 OMPClause *RebuildOMPThreadLimitClause(Expr *ThreadLimit,
1967 SourceLocation StartLoc,
1968 SourceLocation LParenLoc,
1969 SourceLocation EndLoc) {
1970 return getSema().ActOnOpenMPThreadLimitClause(ThreadLimit, StartLoc,
1971 LParenLoc, EndLoc);
1972 }
1973
1974 /// Build a new OpenMP 'priority' clause.
1975 ///
1976 /// By default, performs semantic analysis to build the new statement.
1977 /// Subclasses may override this routine to provide different behavior.
1978 OMPClause *RebuildOMPPriorityClause(Expr *Priority, SourceLocation StartLoc,
1979 SourceLocation LParenLoc,
1980 SourceLocation EndLoc) {
1981 return getSema().ActOnOpenMPPriorityClause(Priority, StartLoc, LParenLoc,
1982 EndLoc);
1983 }
1984
1985 /// Build a new OpenMP 'grainsize' clause.
1986 ///
1987 /// By default, performs semantic analysis to build the new statement.
1988 /// Subclasses may override this routine to provide different behavior.
1989 OMPClause *RebuildOMPGrainsizeClause(Expr *Grainsize, SourceLocation StartLoc,
1990 SourceLocation LParenLoc,
1991 SourceLocation EndLoc) {
1992 return getSema().ActOnOpenMPGrainsizeClause(Grainsize, StartLoc, LParenLoc,
1993 EndLoc);
1994 }
1995
1996 /// Build a new OpenMP 'num_tasks' clause.
1997 ///
1998 /// By default, performs semantic analysis to build the new statement.
1999 /// Subclasses may override this routine to provide different behavior.
2000 OMPClause *RebuildOMPNumTasksClause(Expr *NumTasks, SourceLocation StartLoc,
2001 SourceLocation LParenLoc,
2002 SourceLocation EndLoc) {
2003 return getSema().ActOnOpenMPNumTasksClause(NumTasks, StartLoc, LParenLoc,
2004 EndLoc);
2005 }
2006
2007 /// Build a new OpenMP 'hint' clause.
2008 ///
2009 /// By default, performs semantic analysis to build the new statement.
2010 /// Subclasses may override this routine to provide different behavior.
2011 OMPClause *RebuildOMPHintClause(Expr *Hint, SourceLocation StartLoc,
2012 SourceLocation LParenLoc,
2013 SourceLocation EndLoc) {
2014 return getSema().ActOnOpenMPHintClause(Hint, StartLoc, LParenLoc, EndLoc);
2015 }
2016
2017 /// Build a new OpenMP 'detach' clause.
2018 ///
2019 /// By default, performs semantic analysis to build the new statement.
2020 /// Subclasses may override this routine to provide different behavior.
2021 OMPClause *RebuildOMPDetachClause(Expr *Evt, SourceLocation StartLoc,
2022 SourceLocation LParenLoc,
2023 SourceLocation EndLoc) {
2024 return getSema().ActOnOpenMPDetachClause(Evt, StartLoc, LParenLoc, EndLoc);
2025 }
2026
2027 /// Build a new OpenMP 'dist_schedule' clause.
2028 ///
2029 /// By default, performs semantic analysis to build the new OpenMP clause.
2030 /// Subclasses may override this routine to provide different behavior.
2031 OMPClause *
2032 RebuildOMPDistScheduleClause(OpenMPDistScheduleClauseKind Kind,
2033 Expr *ChunkSize, SourceLocation StartLoc,
2034 SourceLocation LParenLoc, SourceLocation KindLoc,
2035 SourceLocation CommaLoc, SourceLocation EndLoc) {
2036 return getSema().ActOnOpenMPDistScheduleClause(
2037 Kind, ChunkSize, StartLoc, LParenLoc, KindLoc, CommaLoc, EndLoc);
2038 }
2039
2040 /// Build a new OpenMP 'to' clause.
2041 ///
2042 /// By default, performs semantic analysis to build the new statement.
2043 /// Subclasses may override this routine to provide different behavior.
2044 OMPClause *
2045 RebuildOMPToClause(ArrayRef<OpenMPMotionModifierKind> MotionModifiers,
2046 ArrayRef<SourceLocation> MotionModifiersLoc,
2047 CXXScopeSpec &MapperIdScopeSpec,
2048 DeclarationNameInfo &MapperId, SourceLocation ColonLoc,
2049 ArrayRef<Expr *> VarList, const OMPVarListLocTy &Locs,
2050 ArrayRef<Expr *> UnresolvedMappers) {
2051 return getSema().ActOnOpenMPToClause(MotionModifiers, MotionModifiersLoc,
2052 MapperIdScopeSpec, MapperId, ColonLoc,
2053 VarList, Locs, UnresolvedMappers);
2054 }
2055
2056 /// Build a new OpenMP 'from' clause.
2057 ///
2058 /// By default, performs semantic analysis to build the new statement.
2059 /// Subclasses may override this routine to provide different behavior.
2060 OMPClause *
2061 RebuildOMPFromClause(ArrayRef<OpenMPMotionModifierKind> MotionModifiers,
2062 ArrayRef<SourceLocation> MotionModifiersLoc,
2063 CXXScopeSpec &MapperIdScopeSpec,
2064 DeclarationNameInfo &MapperId, SourceLocation ColonLoc,
2065 ArrayRef<Expr *> VarList, const OMPVarListLocTy &Locs,
2066 ArrayRef<Expr *> UnresolvedMappers) {
2067 return getSema().ActOnOpenMPFromClause(
2068 MotionModifiers, MotionModifiersLoc, MapperIdScopeSpec, MapperId,
2069 ColonLoc, VarList, Locs, UnresolvedMappers);
2070 }
2071
2072 /// Build a new OpenMP 'use_device_ptr' clause.
2073 ///
2074 /// By default, performs semantic analysis to build the new OpenMP clause.
2075 /// Subclasses may override this routine to provide different behavior.
2076 OMPClause *RebuildOMPUseDevicePtrClause(ArrayRef<Expr *> VarList,
2077 const OMPVarListLocTy &Locs) {
2078 return getSema().ActOnOpenMPUseDevicePtrClause(VarList, Locs);
2079 }
2080
2081 /// Build a new OpenMP 'use_device_addr' clause.
2082 ///
2083 /// By default, performs semantic analysis to build the new OpenMP clause.
2084 /// Subclasses may override this routine to provide different behavior.
2085 OMPClause *RebuildOMPUseDeviceAddrClause(ArrayRef<Expr *> VarList,
2086 const OMPVarListLocTy &Locs) {
2087 return getSema().ActOnOpenMPUseDeviceAddrClause(VarList, Locs);
2088 }
2089
2090 /// Build a new OpenMP 'is_device_ptr' clause.
2091 ///
2092 /// By default, performs semantic analysis to build the new OpenMP clause.
2093 /// Subclasses may override this routine to provide different behavior.
2094 OMPClause *RebuildOMPIsDevicePtrClause(ArrayRef<Expr *> VarList,
2095 const OMPVarListLocTy &Locs) {
2096 return getSema().ActOnOpenMPIsDevicePtrClause(VarList, Locs);
2097 }
2098
2099 /// Build a new OpenMP 'defaultmap' clause.
2100 ///
2101 /// By default, performs semantic analysis to build the new OpenMP clause.
2102 /// Subclasses may override this routine to provide different behavior.
2103 OMPClause *RebuildOMPDefaultmapClause(OpenMPDefaultmapClauseModifier M,
2104 OpenMPDefaultmapClauseKind Kind,
2105 SourceLocation StartLoc,
2106 SourceLocation LParenLoc,
2107 SourceLocation MLoc,
2108 SourceLocation KindLoc,
2109 SourceLocation EndLoc) {
2110 return getSema().ActOnOpenMPDefaultmapClause(M, Kind, StartLoc, LParenLoc,
2111 MLoc, KindLoc, EndLoc);
2112 }
2113
2114 /// Build a new OpenMP 'nontemporal' clause.
2115 ///
2116 /// By default, performs semantic analysis to build the new OpenMP clause.
2117 /// Subclasses may override this routine to provide different behavior.
2118 OMPClause *RebuildOMPNontemporalClause(ArrayRef<Expr *> VarList,
2119 SourceLocation StartLoc,
2120 SourceLocation LParenLoc,
2121 SourceLocation EndLoc) {
2122 return getSema().ActOnOpenMPNontemporalClause(VarList, StartLoc, LParenLoc,
2123 EndLoc);
2124 }
2125
2126 /// Build a new OpenMP 'inclusive' clause.
2127 ///
2128 /// By default, performs semantic analysis to build the new OpenMP clause.
2129 /// Subclasses may override this routine to provide different behavior.
2130 OMPClause *RebuildOMPInclusiveClause(ArrayRef<Expr *> VarList,
2131 SourceLocation StartLoc,
2132 SourceLocation LParenLoc,
2133 SourceLocation EndLoc) {
2134 return getSema().ActOnOpenMPInclusiveClause(VarList, StartLoc, LParenLoc,
2135 EndLoc);
2136 }
2137
2138 /// Build a new OpenMP 'exclusive' clause.
2139 ///
2140 /// By default, performs semantic analysis to build the new OpenMP clause.
2141 /// Subclasses may override this routine to provide different behavior.
2142 OMPClause *RebuildOMPExclusiveClause(ArrayRef<Expr *> VarList,
2143 SourceLocation StartLoc,
2144 SourceLocation LParenLoc,
2145 SourceLocation EndLoc) {
2146 return getSema().ActOnOpenMPExclusiveClause(VarList, StartLoc, LParenLoc,
2147 EndLoc);
2148 }
2149
2150 /// Build a new OpenMP 'uses_allocators' clause.
2151 ///
2152 /// By default, performs semantic analysis to build the new OpenMP clause.
2153 /// Subclasses may override this routine to provide different behavior.
2154 OMPClause *RebuildOMPUsesAllocatorsClause(
2155 ArrayRef<Sema::UsesAllocatorsData> Data, SourceLocation StartLoc,
2156 SourceLocation LParenLoc, SourceLocation EndLoc) {
2157 return getSema().ActOnOpenMPUsesAllocatorClause(StartLoc, LParenLoc, EndLoc,
2158 Data);
2159 }
2160
2161 /// Build a new OpenMP 'affinity' clause.
2162 ///
2163 /// By default, performs semantic analysis to build the new OpenMP clause.
2164 /// Subclasses may override this routine to provide different behavior.
2165 OMPClause *RebuildOMPAffinityClause(SourceLocation StartLoc,
2166 SourceLocation LParenLoc,
2167 SourceLocation ColonLoc,
2168 SourceLocation EndLoc, Expr *Modifier,
2169 ArrayRef<Expr *> Locators) {
2170 return getSema().ActOnOpenMPAffinityClause(StartLoc, LParenLoc, ColonLoc,
2171 EndLoc, Modifier, Locators);
2172 }
2173
2174 /// Build a new OpenMP 'order' clause.
2175 ///
2176 /// By default, performs semantic analysis to build the new OpenMP clause.
2177 /// Subclasses may override this routine to provide different behavior.
2178 OMPClause *RebuildOMPOrderClause(OpenMPOrderClauseKind Kind,
2179 SourceLocation KindKwLoc,
2180 SourceLocation StartLoc,
2181 SourceLocation LParenLoc,
2182 SourceLocation EndLoc) {
2183 return getSema().ActOnOpenMPOrderClause(Kind, KindKwLoc, StartLoc,
2184 LParenLoc, EndLoc);
2185 }
2186
2187 /// Build a new OpenMP 'init' clause.
2188 ///
2189 /// By default, performs semantic analysis to build the new OpenMP clause.
2190 /// Subclasses may override this routine to provide different behavior.
2191 OMPClause *RebuildOMPInitClause(Expr *InteropVar, ArrayRef<Expr *> PrefExprs,
2192 bool IsTarget, bool IsTargetSync,
2193 SourceLocation StartLoc,
2194 SourceLocation LParenLoc,
2195 SourceLocation VarLoc,
2196 SourceLocation EndLoc) {
2197 return getSema().ActOnOpenMPInitClause(InteropVar, PrefExprs, IsTarget,
2198 IsTargetSync, StartLoc, LParenLoc,
2199 VarLoc, EndLoc);
2200 }
2201
2202 /// Build a new OpenMP 'use' clause.
2203 ///
2204 /// By default, performs semantic analysis to build the new OpenMP clause.
2205 /// Subclasses may override this routine to provide different behavior.
2206 OMPClause *RebuildOMPUseClause(Expr *InteropVar, SourceLocation StartLoc,
2207 SourceLocation LParenLoc,
2208 SourceLocation VarLoc, SourceLocation EndLoc) {
2209 return getSema().ActOnOpenMPUseClause(InteropVar, StartLoc, LParenLoc,
2210 VarLoc, EndLoc);
2211 }
2212
2213 /// Build a new OpenMP 'destroy' clause.
2214 ///
2215 /// By default, performs semantic analysis to build the new OpenMP clause.
2216 /// Subclasses may override this routine to provide different behavior.
2217 OMPClause *RebuildOMPDestroyClause(Expr *InteropVar, SourceLocation StartLoc,
2218 SourceLocation LParenLoc,
2219 SourceLocation VarLoc,
2220 SourceLocation EndLoc) {
2221 return getSema().ActOnOpenMPDestroyClause(InteropVar, StartLoc, LParenLoc,
2222 VarLoc, EndLoc);
2223 }
2224
2225 /// Build a new OpenMP 'novariants' clause.
2226 ///
2227 /// By default, performs semantic analysis to build the new OpenMP clause.
2228 /// Subclasses may override this routine to provide different behavior.
2229 OMPClause *RebuildOMPNovariantsClause(Expr *Condition,
2230 SourceLocation StartLoc,
2231 SourceLocation LParenLoc,
2232 SourceLocation EndLoc) {
2233 return getSema().ActOnOpenMPNovariantsClause(Condition, StartLoc, LParenLoc,
2234 EndLoc);
2235 }
2236
2237 /// Build a new OpenMP 'nocontext' clause.
2238 ///
2239 /// By default, performs semantic analysis to build the new OpenMP clause.
2240 /// Subclasses may override this routine to provide different behavior.
2241 OMPClause *RebuildOMPNocontextClause(Expr *Condition, SourceLocation StartLoc,
2242 SourceLocation LParenLoc,
2243 SourceLocation EndLoc) {
2244 return getSema().ActOnOpenMPNocontextClause(Condition, StartLoc, LParenLoc,
2245 EndLoc);
2246 }
2247
2248 /// Build a new OpenMP 'filter' clause.
2249 ///
2250 /// By default, performs semantic analysis to build the new OpenMP clause.
2251 /// Subclasses may override this routine to provide different behavior.
2252 OMPClause *RebuildOMPFilterClause(Expr *ThreadID, SourceLocation StartLoc,
2253 SourceLocation LParenLoc,
2254 SourceLocation EndLoc) {
2255 return getSema().ActOnOpenMPFilterClause(ThreadID, StartLoc, LParenLoc,
2256 EndLoc);
2257 }
2258
2259 /// Rebuild the operand to an Objective-C \@synchronized statement.
2260 ///
2261 /// By default, performs semantic analysis to build the new statement.
2262 /// Subclasses may override this routine to provide different behavior.
2263 ExprResult RebuildObjCAtSynchronizedOperand(SourceLocation atLoc,
2264 Expr *object) {
2265 return getSema().ActOnObjCAtSynchronizedOperand(atLoc, object);
2266 }
2267
2268 /// Build a new Objective-C \@synchronized statement.
2269 ///
2270 /// By default, performs semantic analysis to build the new statement.
2271 /// Subclasses may override this routine to provide different behavior.
2272 StmtResult RebuildObjCAtSynchronizedStmt(SourceLocation AtLoc,
2273 Expr *Object, Stmt *Body) {
2274 return getSema().ActOnObjCAtSynchronizedStmt(AtLoc, Object, Body);
2275 }
2276
2277 /// Build a new Objective-C \@autoreleasepool statement.
2278 ///
2279 /// By default, performs semantic analysis to build the new statement.
2280 /// Subclasses may override this routine to provide different behavior.
2281 StmtResult RebuildObjCAutoreleasePoolStmt(SourceLocation AtLoc,
2282 Stmt *Body) {
2283 return getSema().ActOnObjCAutoreleasePoolStmt(AtLoc, Body);
2284 }
2285
2286 /// Build a new Objective-C fast enumeration statement.
2287 ///
2288 /// By default, performs semantic analysis to build the new statement.
2289 /// Subclasses may override this routine to provide different behavior.
2290 StmtResult RebuildObjCForCollectionStmt(SourceLocation ForLoc,
2291 Stmt *Element,
2292 Expr *Collection,
2293 SourceLocation RParenLoc,
2294 Stmt *Body) {
2295 StmtResult ForEachStmt = getSema().ActOnObjCForCollectionStmt(ForLoc,
2296 Element,
2297 Collection,
2298 RParenLoc);
2299 if (ForEachStmt.isInvalid())
2300 return StmtError();
2301
2302 return getSema().FinishObjCForCollectionStmt(ForEachStmt.get(), Body);
2303 }
2304
2305 /// Build a new C++ exception declaration.
2306 ///
2307 /// By default, performs semantic analysis to build the new decaration.
2308 /// Subclasses may override this routine to provide different behavior.
2309 VarDecl *RebuildExceptionDecl(VarDecl *ExceptionDecl,
2310 TypeSourceInfo *Declarator,
2311 SourceLocation StartLoc,
2312 SourceLocation IdLoc,
2313 IdentifierInfo *Id) {
2314 VarDecl *Var = getSema().BuildExceptionDeclaration(nullptr, Declarator,
2315 StartLoc, IdLoc, Id);
2316 if (Var)
2317 getSema().CurContext->addDecl(Var);
2318 return Var;
2319 }
2320
2321 /// Build a new C++ catch statement.
2322 ///
2323 /// By default, performs semantic analysis to build the new statement.
2324 /// Subclasses may override this routine to provide different behavior.
2325 StmtResult RebuildCXXCatchStmt(SourceLocation CatchLoc,
2326 VarDecl *ExceptionDecl,
2327 Stmt *Handler) {
2328 return Owned(new (getSema().Context) CXXCatchStmt(CatchLoc, ExceptionDecl,
2329 Handler));
2330 }
2331
2332 /// Build a new C++ try statement.
2333 ///
2334 /// By default, performs semantic analysis to build the new statement.
2335 /// Subclasses may override this routine to provide different behavior.
2336 StmtResult RebuildCXXTryStmt(SourceLocation TryLoc, Stmt *TryBlock,
2337 ArrayRef<Stmt *> Handlers) {
2338 return getSema().ActOnCXXTryBlock(TryLoc, TryBlock, Handlers);
2339 }
2340
2341 /// Build a new C++0x range-based for statement.
2342 ///
2343 /// By default, performs semantic analysis to build the new statement.
2344 /// Subclasses may override this routine to provide different behavior.
2345 StmtResult RebuildCXXForRangeStmt(S