Bug Summary

File:clang/lib/Sema/TreeTransform.h
Warning:line 5705, column 24
Forming reference to null pointer

Annotated Source Code

Press '?' to see keyboard shortcuts

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 -fhalf-no-semantic-interposition -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-13~++20210413100635+64c24f493e5f/build-llvm/tools/clang/lib/Sema -resource-dir /usr/lib/llvm-13/lib/clang/13.0.0 -D CLANG_ROUND_TRIP_CC1_ARGS=ON -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/build-llvm/tools/clang/lib/Sema -I /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema -I /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/include -I /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/build-llvm/include -I /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/lib/llvm-13/lib/clang/13.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../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-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir=/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/build-llvm/tools/clang/lib/Sema -fdebug-prefix-map=/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f=. -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-2021-04-14-063029-18377-1 -x c++ /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp

/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/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?")((Spec->getSpecializedTemplate() && "No variable template?"
) ? static_cast<void> (0) : __assert_fail ("Spec->getSpecializedTemplate() && \"No variable template?\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 88, __PRETTY_FUNCTION__))
;
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?")((Spec->getSpecializedTemplate() && "No class template?"
) ? static_cast<void> (0) : __assert_fail ("Spec->getSpecializedTemplate() && \"No class template?\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 133, __PRETTY_FUNCTION__))
;
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?")((Function->getPrimaryTemplate() && "No function template?"
) ? static_cast<void> (0) : __assert_fail ("Function->getPrimaryTemplate() && \"No function template?\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 156, __PRETTY_FUNCTION__))
;
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!")::llvm::llvm_unreachable_internal("Invalid SynthesisKind!", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 232)
;
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(((Kind == CodeSynthesisContext::ExplicitTemplateArgumentSubstitution
|| Kind == CodeSynthesisContext::DeducedTemplateArgumentSubstitution
) ? static_cast<void> (0) : __assert_fail ("Kind == CodeSynthesisContext::ExplicitTemplateArgumentSubstitution || Kind == CodeSynthesisContext::DeducedTemplateArgumentSubstitution"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 305, __PRETTY_FUNCTION__))
304 Kind == CodeSynthesisContext::ExplicitTemplateArgumentSubstitution ||((Kind == CodeSynthesisContext::ExplicitTemplateArgumentSubstitution
|| Kind == CodeSynthesisContext::DeducedTemplateArgumentSubstitution
) ? static_cast<void> (0) : __assert_fail ("Kind == CodeSynthesisContext::ExplicitTemplateArgumentSubstitution || Kind == CodeSynthesisContext::DeducedTemplateArgumentSubstitution"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 305, __PRETTY_FUNCTION__))
305 Kind == CodeSynthesisContext::DeducedTemplateArgumentSubstitution)((Kind == CodeSynthesisContext::ExplicitTemplateArgumentSubstitution
|| Kind == CodeSynthesisContext::DeducedTemplateArgumentSubstitution
) ? static_cast<void> (0) : __assert_fail ("Kind == CodeSynthesisContext::ExplicitTemplateArgumentSubstitution || Kind == CodeSynthesisContext::DeducedTemplateArgumentSubstitution"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 305, __PRETTY_FUNCTION__))
;
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)((NonInstantiationEntries > 0) ? static_cast<void> (
0) : __assert_fail ("NonInstantiationEntries > 0", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 451, __PRETTY_FUNCTION__))
;
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() >=((CodeSynthesisContexts.size() >= CodeSynthesisContextLookupModules
.size() && "forgot to remove a lookup module for a template instantiation"
) ? static_cast<void> (0) : __assert_fail ("CodeSynthesisContexts.size() >= CodeSynthesisContextLookupModules.size() && \"forgot to remove a lookup module for a template instantiation\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 460, __PRETTY_FUNCTION__))
459 CodeSynthesisContextLookupModules.size() &&((CodeSynthesisContexts.size() >= CodeSynthesisContextLookupModules
.size() && "forgot to remove a lookup module for a template instantiation"
) ? static_cast<void> (0) : __assert_fail ("CodeSynthesisContexts.size() >= CodeSynthesisContextLookupModules.size() && \"forgot to remove a lookup module for a template instantiation\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 460, __PRETTY_FUNCTION__))
460 "forgot to remove a lookup module for a template instantiation")((CodeSynthesisContexts.size() >= CodeSynthesisContextLookupModules
.size() && "forgot to remove a lookup module for a template instantiation"
) ? static_cast<void> (0) : __assert_fail ("CodeSynthesisContexts.size() >= CodeSynthesisContextLookupModules.size() && \"forgot to remove a lookup module for a template instantiation\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 460, __PRETTY_FUNCTION__))
;
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 <=((SemaRef.NonInstantiationEntries <= SemaRef.CodeSynthesisContexts
.size()) ? static_cast<void> (0) : __assert_fail ("SemaRef.NonInstantiationEntries <= SemaRef.CodeSynthesisContexts.size()"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 498, __PRETTY_FUNCTION__))
498 SemaRef.CodeSynthesisContexts.size())((SemaRef.NonInstantiationEntries <= SemaRef.CodeSynthesisContexts
.size()) ? static_cast<void> (0) : __assert_fail ("SemaRef.NonInstantiationEntries <= SemaRef.CodeSynthesisContexts.size()"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 498, __PRETTY_FUNCTION__))
;
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")::llvm::llvm_unreachable_internal("unexpected template kind",
"/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 636)
;
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))((isa<FunctionDecl>(Active->Entity)) ? static_cast<
void> (0) : __assert_fail ("isa<FunctionDecl>(Active->Entity)"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 802, __PRETTY_FUNCTION__))
;
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 Diags.Report(Active->PointOfInstantiation, DiagID) << OS.str()
812 << Active->InstantiationRange;
813 break;
814 }
815 case CodeSynthesisContext::ConstraintSubstitution:
816 Diags.Report(Active->PointOfInstantiation,
817 diag::note_constraint_substitution_here)
818 << Active->InstantiationRange;
819 break;
820 case CodeSynthesisContext::ConstraintNormalization:
821 Diags.Report(Active->PointOfInstantiation,
822 diag::note_constraint_normalization_here)
823 << cast<NamedDecl>(Active->Entity)->getName()
824 << Active->InstantiationRange;
825 break;
826 case CodeSynthesisContext::ParameterMappingSubstitution:
827 Diags.Report(Active->PointOfInstantiation,
828 diag::note_parameter_mapping_substitution_here)
829 << Active->InstantiationRange;
830 break;
831 }
832 }
833}
834
835Optional<TemplateDeductionInfo *> Sema::isSFINAEContext() const {
836 if (InNonInstantiationSFINAEContext)
837 return Optional<TemplateDeductionInfo *>(nullptr);
838
839 for (SmallVectorImpl<CodeSynthesisContext>::const_reverse_iterator
840 Active = CodeSynthesisContexts.rbegin(),
841 ActiveEnd = CodeSynthesisContexts.rend();
842 Active != ActiveEnd;
843 ++Active)
844 {
845 switch (Active->Kind) {
846 case CodeSynthesisContext::TemplateInstantiation:
847 // An instantiation of an alias template may or may not be a SFINAE
848 // context, depending on what else is on the stack.
849 if (isa<TypeAliasTemplateDecl>(Active->Entity))
850 break;
851 LLVM_FALLTHROUGH[[gnu::fallthrough]];
852 case CodeSynthesisContext::DefaultFunctionArgumentInstantiation:
853 case CodeSynthesisContext::ExceptionSpecInstantiation:
854 case CodeSynthesisContext::ConstraintsCheck:
855 case CodeSynthesisContext::ParameterMappingSubstitution:
856 case CodeSynthesisContext::ConstraintNormalization:
857 case CodeSynthesisContext::NestedRequirementConstraintsCheck:
858 // This is a template instantiation, so there is no SFINAE.
859 return None;
860
861 case CodeSynthesisContext::DefaultTemplateArgumentInstantiation:
862 case CodeSynthesisContext::PriorTemplateArgumentSubstitution:
863 case CodeSynthesisContext::DefaultTemplateArgumentChecking:
864 case CodeSynthesisContext::RewritingOperatorAsSpaceship:
865 // A default template argument instantiation and substitution into
866 // template parameters with arguments for prior parameters may or may
867 // not be a SFINAE context; look further up the stack.
868 break;
869
870 case CodeSynthesisContext::ExplicitTemplateArgumentSubstitution:
871 case CodeSynthesisContext::DeducedTemplateArgumentSubstitution:
872 case CodeSynthesisContext::ConstraintSubstitution:
873 case CodeSynthesisContext::RequirementInstantiation:
874 // We're either substituting explicitly-specified template arguments,
875 // deduced template arguments, a constraint expression or a requirement
876 // in a requires expression, so SFINAE applies.
877 assert(Active->DeductionInfo && "Missing deduction info pointer")((Active->DeductionInfo && "Missing deduction info pointer"
) ? static_cast<void> (0) : __assert_fail ("Active->DeductionInfo && \"Missing deduction info pointer\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 877, __PRETTY_FUNCTION__))
;
878 return Active->DeductionInfo;
879
880 case CodeSynthesisContext::DeclaringSpecialMember:
881 case CodeSynthesisContext::DeclaringImplicitEqualityComparison:
882 case CodeSynthesisContext::DefiningSynthesizedFunction:
883 case CodeSynthesisContext::InitializingStructuredBinding:
884 case CodeSynthesisContext::MarkingClassDllexported:
885 // This happens in a context unrelated to template instantiation, so
886 // there is no SFINAE.
887 return None;
888
889 case CodeSynthesisContext::ExceptionSpecEvaluation:
890 // FIXME: This should not be treated as a SFINAE context, because
891 // we will cache an incorrect exception specification. However, clang
892 // bootstrap relies this! See PR31692.
893 break;
894
895 case CodeSynthesisContext::Memoization:
896 break;
897 }
898
899 // The inner context was transparent for SFINAE. If it occurred within a
900 // non-instantiation SFINAE context, then SFINAE applies.
901 if (Active->SavedInNonInstantiationSFINAEContext)
902 return Optional<TemplateDeductionInfo *>(nullptr);
903 }
904
905 return None;
906}
907
908//===----------------------------------------------------------------------===/
909// Template Instantiation for Types
910//===----------------------------------------------------------------------===/
911namespace {
912 class TemplateInstantiator : public TreeTransform<TemplateInstantiator> {
913 const MultiLevelTemplateArgumentList &TemplateArgs;
914 SourceLocation Loc;
915 DeclarationName Entity;
916
917 public:
918 typedef TreeTransform<TemplateInstantiator> inherited;
919
920 TemplateInstantiator(Sema &SemaRef,
921 const MultiLevelTemplateArgumentList &TemplateArgs,
922 SourceLocation Loc,
923 DeclarationName Entity)
924 : inherited(SemaRef), TemplateArgs(TemplateArgs), Loc(Loc),
925 Entity(Entity) { }
926
927 /// Determine whether the given type \p T has already been
928 /// transformed.
929 ///
930 /// For the purposes of template instantiation, a type has already been
931 /// transformed if it is NULL or if it is not dependent.
932 bool AlreadyTransformed(QualType T);
933
934 /// Returns the location of the entity being instantiated, if known.
935 SourceLocation getBaseLocation() { return Loc; }
936
937 /// Returns the name of the entity being instantiated, if any.
938 DeclarationName getBaseEntity() { return Entity; }
939
940 /// Sets the "base" location and entity when that
941 /// information is known based on another transformation.
942 void setBase(SourceLocation Loc, DeclarationName Entity) {
943 this->Loc = Loc;
944 this->Entity = Entity;
945 }
946
947 unsigned TransformTemplateDepth(unsigned Depth) {
948 return TemplateArgs.getNewDepth(Depth);
949 }
950
951 bool TryExpandParameterPacks(SourceLocation EllipsisLoc,
952 SourceRange PatternRange,
953 ArrayRef<UnexpandedParameterPack> Unexpanded,
954 bool &ShouldExpand, bool &RetainExpansion,
955 Optional<unsigned> &NumExpansions) {
956 return getSema().CheckParameterPacksForExpansion(EllipsisLoc,
957 PatternRange, Unexpanded,
958 TemplateArgs,
959 ShouldExpand,
960 RetainExpansion,
961 NumExpansions);
962 }
963
964 void ExpandingFunctionParameterPack(ParmVarDecl *Pack) {
965 SemaRef.CurrentInstantiationScope->MakeInstantiatedLocalArgPack(Pack);
966 }
967
968 TemplateArgument ForgetPartiallySubstitutedPack() {
969 TemplateArgument Result;
970 if (NamedDecl *PartialPack
971 = SemaRef.CurrentInstantiationScope->getPartiallySubstitutedPack()){
972 MultiLevelTemplateArgumentList &TemplateArgs
973 = const_cast<MultiLevelTemplateArgumentList &>(this->TemplateArgs);
974 unsigned Depth, Index;
975 std::tie(Depth, Index) = getDepthAndIndex(PartialPack);
976 if (TemplateArgs.hasTemplateArgument(Depth, Index)) {
977 Result = TemplateArgs(Depth, Index);
978 TemplateArgs.setArgument(Depth, Index, TemplateArgument());
979 }
980 }
981
982 return Result;
983 }
984
985 void RememberPartiallySubstitutedPack(TemplateArgument Arg) {
986 if (Arg.isNull())
987 return;
988
989 if (NamedDecl *PartialPack
990 = SemaRef.CurrentInstantiationScope->getPartiallySubstitutedPack()){
991 MultiLevelTemplateArgumentList &TemplateArgs
992 = const_cast<MultiLevelTemplateArgumentList &>(this->TemplateArgs);
993 unsigned Depth, Index;
994 std::tie(Depth, Index) = getDepthAndIndex(PartialPack);
995 TemplateArgs.setArgument(Depth, Index, Arg);
996 }
997 }
998
999 /// Transform the given declaration by instantiating a reference to
1000 /// this declaration.
1001 Decl *TransformDecl(SourceLocation Loc, Decl *D);
1002
1003 void transformAttrs(Decl *Old, Decl *New) {
1004 SemaRef.InstantiateAttrs(TemplateArgs, Old, New);
1005 }
1006
1007 void transformedLocalDecl(Decl *Old, ArrayRef<Decl *> NewDecls) {
1008 if (Old->isParameterPack()) {
1009 SemaRef.CurrentInstantiationScope->MakeInstantiatedLocalArgPack(Old);
1010 for (auto *New : NewDecls)
1011 SemaRef.CurrentInstantiationScope->InstantiatedLocalPackArg(
1012 Old, cast<VarDecl>(New));
1013 return;
1014 }
1015
1016 assert(NewDecls.size() == 1 &&((NewDecls.size() == 1 && "should only have multiple expansions for a pack"
) ? static_cast<void> (0) : __assert_fail ("NewDecls.size() == 1 && \"should only have multiple expansions for a pack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1017, __PRETTY_FUNCTION__))
1017 "should only have multiple expansions for a pack")((NewDecls.size() == 1 && "should only have multiple expansions for a pack"
) ? static_cast<void> (0) : __assert_fail ("NewDecls.size() == 1 && \"should only have multiple expansions for a pack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1017, __PRETTY_FUNCTION__))
;
1018 Decl *New = NewDecls.front();
1019
1020 // If we've instantiated the call operator of a lambda or the call
1021 // operator template of a generic lambda, update the "instantiation of"
1022 // information.
1023 auto *NewMD = dyn_cast<CXXMethodDecl>(New);
1024 if (NewMD && isLambdaCallOperator(NewMD)) {
1025 auto *OldMD = dyn_cast<CXXMethodDecl>(Old);
1026 if (auto *NewTD = NewMD->getDescribedFunctionTemplate())
1027 NewTD->setInstantiatedFromMemberTemplate(
1028 OldMD->getDescribedFunctionTemplate());
1029 else
1030 NewMD->setInstantiationOfMemberFunction(OldMD,
1031 TSK_ImplicitInstantiation);
1032 }
1033
1034 SemaRef.CurrentInstantiationScope->InstantiatedLocal(Old, New);
1035
1036 // We recreated a local declaration, but not by instantiating it. There
1037 // may be pending dependent diagnostics to produce.
1038 if (auto *DC = dyn_cast<DeclContext>(Old))
1039 SemaRef.PerformDependentDiagnostics(DC, TemplateArgs);
1040 }
1041
1042 /// Transform the definition of the given declaration by
1043 /// instantiating it.
1044 Decl *TransformDefinition(SourceLocation Loc, Decl *D);
1045
1046 /// Transform the first qualifier within a scope by instantiating the
1047 /// declaration.
1048 NamedDecl *TransformFirstQualifierInScope(NamedDecl *D, SourceLocation Loc);
1049
1050 /// Rebuild the exception declaration and register the declaration
1051 /// as an instantiated local.
1052 VarDecl *RebuildExceptionDecl(VarDecl *ExceptionDecl,
1053 TypeSourceInfo *Declarator,
1054 SourceLocation StartLoc,
1055 SourceLocation NameLoc,
1056 IdentifierInfo *Name);
1057
1058 /// Rebuild the Objective-C exception declaration and register the
1059 /// declaration as an instantiated local.
1060 VarDecl *RebuildObjCExceptionDecl(VarDecl *ExceptionDecl,
1061 TypeSourceInfo *TSInfo, QualType T);
1062
1063 /// Check for tag mismatches when instantiating an
1064 /// elaborated type.
1065 QualType RebuildElaboratedType(SourceLocation KeywordLoc,
1066 ElaboratedTypeKeyword Keyword,
1067 NestedNameSpecifierLoc QualifierLoc,
1068 QualType T);
1069
1070 TemplateName
1071 TransformTemplateName(CXXScopeSpec &SS, TemplateName Name,
1072 SourceLocation NameLoc,
1073 QualType ObjectType = QualType(),
1074 NamedDecl *FirstQualifierInScope = nullptr,
1075 bool AllowInjectedClassName = false);
1076
1077 const LoopHintAttr *TransformLoopHintAttr(const LoopHintAttr *LH);
1078
1079 ExprResult TransformPredefinedExpr(PredefinedExpr *E);
1080 ExprResult TransformDeclRefExpr(DeclRefExpr *E);
1081 ExprResult TransformCXXDefaultArgExpr(CXXDefaultArgExpr *E);
1082
1083 ExprResult TransformTemplateParmRefExpr(DeclRefExpr *E,
1084 NonTypeTemplateParmDecl *D);
1085 ExprResult TransformSubstNonTypeTemplateParmPackExpr(
1086 SubstNonTypeTemplateParmPackExpr *E);
1087 ExprResult TransformSubstNonTypeTemplateParmExpr(
1088 SubstNonTypeTemplateParmExpr *E);
1089
1090 /// Rebuild a DeclRefExpr for a VarDecl reference.
1091 ExprResult RebuildVarDeclRefExpr(VarDecl *PD, SourceLocation Loc);
1092
1093 /// Transform a reference to a function or init-capture parameter pack.
1094 ExprResult TransformFunctionParmPackRefExpr(DeclRefExpr *E, VarDecl *PD);
1095
1096 /// Transform a FunctionParmPackExpr which was built when we couldn't
1097 /// expand a function parameter pack reference which refers to an expanded
1098 /// pack.
1099 ExprResult TransformFunctionParmPackExpr(FunctionParmPackExpr *E);
1100
1101 QualType TransformFunctionProtoType(TypeLocBuilder &TLB,
1102 FunctionProtoTypeLoc TL) {
1103 // Call the base version; it will forward to our overridden version below.
1104 return inherited::TransformFunctionProtoType(TLB, TL);
1105 }
1106
1107 template<typename Fn>
1108 QualType TransformFunctionProtoType(TypeLocBuilder &TLB,
1109 FunctionProtoTypeLoc TL,
1110 CXXRecordDecl *ThisContext,
1111 Qualifiers ThisTypeQuals,
1112 Fn TransformExceptionSpec);
1113
1114 ParmVarDecl *TransformFunctionTypeParam(ParmVarDecl *OldParm,
1115 int indexAdjustment,
1116 Optional<unsigned> NumExpansions,
1117 bool ExpectParameterPack);
1118
1119 /// Transforms a template type parameter type by performing
1120 /// substitution of the corresponding template type argument.
1121 QualType TransformTemplateTypeParmType(TypeLocBuilder &TLB,
1122 TemplateTypeParmTypeLoc TL);
1123
1124 /// Transforms an already-substituted template type parameter pack
1125 /// into either itself (if we aren't substituting into its pack expansion)
1126 /// or the appropriate substituted argument.
1127 QualType TransformSubstTemplateTypeParmPackType(TypeLocBuilder &TLB,
1128 SubstTemplateTypeParmPackTypeLoc TL);
1129
1130 ExprResult TransformLambdaExpr(LambdaExpr *E) {
1131 LocalInstantiationScope Scope(SemaRef, /*CombineWithOuterScope=*/true);
1132 return TreeTransform<TemplateInstantiator>::TransformLambdaExpr(E);
1133 }
1134
1135 ExprResult TransformRequiresExpr(RequiresExpr *E) {
1136 LocalInstantiationScope Scope(SemaRef, /*CombineWithOuterScope=*/true);
1137 return TreeTransform<TemplateInstantiator>::TransformRequiresExpr(E);
1
Calling 'TreeTransform::TransformRequiresExpr'
1138 }
1139
1140 bool TransformRequiresExprRequirements(
1141 ArrayRef<concepts::Requirement *> Reqs,
1142 SmallVectorImpl<concepts::Requirement *> &Transformed) {
1143 bool SatisfactionDetermined = false;
1144 for (concepts::Requirement *Req : Reqs) {
1145 concepts::Requirement *TransReq = nullptr;
1146 if (!SatisfactionDetermined) {
1147 if (auto *TypeReq = dyn_cast<concepts::TypeRequirement>(Req))
1148 TransReq = TransformTypeRequirement(TypeReq);
1149 else if (auto *ExprReq = dyn_cast<concepts::ExprRequirement>(Req))
1150 TransReq = TransformExprRequirement(ExprReq);
1151 else
1152 TransReq = TransformNestedRequirement(
1153 cast<concepts::NestedRequirement>(Req));
1154 if (!TransReq)
1155 return true;
1156 if (!TransReq->isDependent() && !TransReq->isSatisfied())
1157 // [expr.prim.req]p6
1158 // [...] The substitution and semantic constraint checking
1159 // proceeds in lexical order and stops when a condition that
1160 // determines the result of the requires-expression is
1161 // encountered. [..]
1162 SatisfactionDetermined = true;
1163 } else
1164 TransReq = Req;
1165 Transformed.push_back(TransReq);
1166 }
1167 return false;
1168 }
1169
1170 TemplateParameterList *TransformTemplateParameterList(
1171 TemplateParameterList *OrigTPL) {
1172 if (!OrigTPL || !OrigTPL->size()) return OrigTPL;
1173
1174 DeclContext *Owner = OrigTPL->getParam(0)->getDeclContext();
1175 TemplateDeclInstantiator DeclInstantiator(getSema(),
1176 /* DeclContext *Owner */ Owner, TemplateArgs);
1177 return DeclInstantiator.SubstTemplateParams(OrigTPL);
1178 }
1179
1180 concepts::TypeRequirement *
1181 TransformTypeRequirement(concepts::TypeRequirement *Req);
1182 concepts::ExprRequirement *
1183 TransformExprRequirement(concepts::ExprRequirement *Req);
1184 concepts::NestedRequirement *
1185 TransformNestedRequirement(concepts::NestedRequirement *Req);
1186
1187 private:
1188 ExprResult transformNonTypeTemplateParmRef(NonTypeTemplateParmDecl *parm,
1189 SourceLocation loc,
1190 TemplateArgument arg);
1191 };
1192}
1193
1194bool TemplateInstantiator::AlreadyTransformed(QualType T) {
1195 if (T.isNull())
1196 return true;
1197
1198 if (T->isInstantiationDependentType() || T->isVariablyModifiedType())
1199 return false;
1200
1201 getSema().MarkDeclarationsReferencedInType(Loc, T);
1202 return true;
1203}
1204
1205static TemplateArgument
1206getPackSubstitutedTemplateArgument(Sema &S, TemplateArgument Arg) {
1207 assert(S.ArgumentPackSubstitutionIndex >= 0)((S.ArgumentPackSubstitutionIndex >= 0) ? static_cast<void
> (0) : __assert_fail ("S.ArgumentPackSubstitutionIndex >= 0"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1207, __PRETTY_FUNCTION__))
;
1208 assert(S.ArgumentPackSubstitutionIndex < (int)Arg.pack_size())((S.ArgumentPackSubstitutionIndex < (int)Arg.pack_size()) ?
static_cast<void> (0) : __assert_fail ("S.ArgumentPackSubstitutionIndex < (int)Arg.pack_size()"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1208, __PRETTY_FUNCTION__))
;
1209 Arg = Arg.pack_begin()[S.ArgumentPackSubstitutionIndex];
1210 if (Arg.isPackExpansion())
1211 Arg = Arg.getPackExpansionPattern();
1212 return Arg;
1213}
1214
1215Decl *TemplateInstantiator::TransformDecl(SourceLocation Loc, Decl *D) {
1216 if (!D)
1217 return nullptr;
1218
1219 if (TemplateTemplateParmDecl *TTP = dyn_cast<TemplateTemplateParmDecl>(D)) {
1220 if (TTP->getDepth() < TemplateArgs.getNumLevels()) {
1221 // If the corresponding template argument is NULL or non-existent, it's
1222 // because we are performing instantiation from explicitly-specified
1223 // template arguments in a function template, but there were some
1224 // arguments left unspecified.
1225 if (!TemplateArgs.hasTemplateArgument(TTP->getDepth(),
1226 TTP->getPosition()))
1227 return D;
1228
1229 TemplateArgument Arg = TemplateArgs(TTP->getDepth(), TTP->getPosition());
1230
1231 if (TTP->isParameterPack()) {
1232 assert(Arg.getKind() == TemplateArgument::Pack &&((Arg.getKind() == TemplateArgument::Pack && "Missing argument pack"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Pack && \"Missing argument pack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1233, __PRETTY_FUNCTION__))
1233 "Missing argument pack")((Arg.getKind() == TemplateArgument::Pack && "Missing argument pack"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Pack && \"Missing argument pack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1233, __PRETTY_FUNCTION__))
;
1234 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1235 }
1236
1237 TemplateName Template = Arg.getAsTemplate().getNameToSubstitute();
1238 assert(!Template.isNull() && Template.getAsTemplateDecl() &&((!Template.isNull() && Template.getAsTemplateDecl() &&
"Wrong kind of template template argument") ? static_cast<
void> (0) : __assert_fail ("!Template.isNull() && Template.getAsTemplateDecl() && \"Wrong kind of template template argument\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1239, __PRETTY_FUNCTION__))
1239 "Wrong kind of template template argument")((!Template.isNull() && Template.getAsTemplateDecl() &&
"Wrong kind of template template argument") ? static_cast<
void> (0) : __assert_fail ("!Template.isNull() && Template.getAsTemplateDecl() && \"Wrong kind of template template argument\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1239, __PRETTY_FUNCTION__))
;
1240 return Template.getAsTemplateDecl();
1241 }
1242
1243 // Fall through to find the instantiated declaration for this template
1244 // template parameter.
1245 }
1246
1247 return SemaRef.FindInstantiatedDecl(Loc, cast<NamedDecl>(D), TemplateArgs);
1248}
1249
1250Decl *TemplateInstantiator::TransformDefinition(SourceLocation Loc, Decl *D) {
1251 Decl *Inst = getSema().SubstDecl(D, getSema().CurContext, TemplateArgs);
1252 if (!Inst)
1253 return nullptr;
1254
1255 getSema().CurrentInstantiationScope->InstantiatedLocal(D, Inst);
1256 return Inst;
1257}
1258
1259NamedDecl *
1260TemplateInstantiator::TransformFirstQualifierInScope(NamedDecl *D,
1261 SourceLocation Loc) {
1262 // If the first part of the nested-name-specifier was a template type
1263 // parameter, instantiate that type parameter down to a tag type.
1264 if (TemplateTypeParmDecl *TTPD = dyn_cast_or_null<TemplateTypeParmDecl>(D)) {
1265 const TemplateTypeParmType *TTP
1266 = cast<TemplateTypeParmType>(getSema().Context.getTypeDeclType(TTPD));
1267
1268 if (TTP->getDepth() < TemplateArgs.getNumLevels()) {
1269 // FIXME: This needs testing w/ member access expressions.
1270 TemplateArgument Arg = TemplateArgs(TTP->getDepth(), TTP->getIndex());
1271
1272 if (TTP->isParameterPack()) {
1273 assert(Arg.getKind() == TemplateArgument::Pack &&((Arg.getKind() == TemplateArgument::Pack && "Missing argument pack"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Pack && \"Missing argument pack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1274, __PRETTY_FUNCTION__))
1274 "Missing argument pack")((Arg.getKind() == TemplateArgument::Pack && "Missing argument pack"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Pack && \"Missing argument pack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1274, __PRETTY_FUNCTION__))
;
1275
1276 if (getSema().ArgumentPackSubstitutionIndex == -1)
1277 return nullptr;
1278
1279 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1280 }
1281
1282 QualType T = Arg.getAsType();
1283 if (T.isNull())
1284 return cast_or_null<NamedDecl>(TransformDecl(Loc, D));
1285
1286 if (const TagType *Tag = T->getAs<TagType>())
1287 return Tag->getDecl();
1288
1289 // The resulting type is not a tag; complain.
1290 getSema().Diag(Loc, diag::err_nested_name_spec_non_tag) << T;
1291 return nullptr;
1292 }
1293 }
1294
1295 return cast_or_null<NamedDecl>(TransformDecl(Loc, D));
1296}
1297
1298VarDecl *
1299TemplateInstantiator::RebuildExceptionDecl(VarDecl *ExceptionDecl,
1300 TypeSourceInfo *Declarator,
1301 SourceLocation StartLoc,
1302 SourceLocation NameLoc,
1303 IdentifierInfo *Name) {
1304 VarDecl *Var = inherited::RebuildExceptionDecl(ExceptionDecl, Declarator,
1305 StartLoc, NameLoc, Name);
1306 if (Var)
1307 getSema().CurrentInstantiationScope->InstantiatedLocal(ExceptionDecl, Var);
1308 return Var;
1309}
1310
1311VarDecl *TemplateInstantiator::RebuildObjCExceptionDecl(VarDecl *ExceptionDecl,
1312 TypeSourceInfo *TSInfo,
1313 QualType T) {
1314 VarDecl *Var = inherited::RebuildObjCExceptionDecl(ExceptionDecl, TSInfo, T);
1315 if (Var)
1316 getSema().CurrentInstantiationScope->InstantiatedLocal(ExceptionDecl, Var);
1317 return Var;
1318}
1319
1320QualType
1321TemplateInstantiator::RebuildElaboratedType(SourceLocation KeywordLoc,
1322 ElaboratedTypeKeyword Keyword,
1323 NestedNameSpecifierLoc QualifierLoc,
1324 QualType T) {
1325 if (const TagType *TT = T->getAs<TagType>()) {
1326 TagDecl* TD = TT->getDecl();
1327
1328 SourceLocation TagLocation = KeywordLoc;
1329
1330 IdentifierInfo *Id = TD->getIdentifier();
1331
1332 // TODO: should we even warn on struct/class mismatches for this? Seems
1333 // like it's likely to produce a lot of spurious errors.
1334 if (Id && Keyword != ETK_None && Keyword != ETK_Typename) {
1335 TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForKeyword(Keyword);
1336 if (!SemaRef.isAcceptableTagRedeclaration(TD, Kind, /*isDefinition*/false,
1337 TagLocation, Id)) {
1338 SemaRef.Diag(TagLocation, diag::err_use_with_wrong_tag)
1339 << Id
1340 << FixItHint::CreateReplacement(SourceRange(TagLocation),
1341 TD->getKindName());
1342 SemaRef.Diag(TD->getLocation(), diag::note_previous_use);
1343 }
1344 }
1345 }
1346
1347 return TreeTransform<TemplateInstantiator>::RebuildElaboratedType(KeywordLoc,
1348 Keyword,
1349 QualifierLoc,
1350 T);
1351}
1352
1353TemplateName TemplateInstantiator::TransformTemplateName(
1354 CXXScopeSpec &SS, TemplateName Name, SourceLocation NameLoc,
1355 QualType ObjectType, NamedDecl *FirstQualifierInScope,
1356 bool AllowInjectedClassName) {
1357 if (TemplateTemplateParmDecl *TTP
1358 = dyn_cast_or_null<TemplateTemplateParmDecl>(Name.getAsTemplateDecl())) {
1359 if (TTP->getDepth() < TemplateArgs.getNumLevels()) {
1360 // If the corresponding template argument is NULL or non-existent, it's
1361 // because we are performing instantiation from explicitly-specified
1362 // template arguments in a function template, but there were some
1363 // arguments left unspecified.
1364 if (!TemplateArgs.hasTemplateArgument(TTP->getDepth(),
1365 TTP->getPosition()))
1366 return Name;
1367
1368 TemplateArgument Arg = TemplateArgs(TTP->getDepth(), TTP->getPosition());
1369
1370 if (TemplateArgs.isRewrite()) {
1371 // We're rewriting the template parameter as a reference to another
1372 // template parameter.
1373 if (Arg.getKind() == TemplateArgument::Pack) {
1374 assert(Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion() &&((Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion
() && "unexpected pack arguments in template rewrite"
) ? static_cast<void> (0) : __assert_fail ("Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion() && \"unexpected pack arguments in template rewrite\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1375, __PRETTY_FUNCTION__))
1375 "unexpected pack arguments in template rewrite")((Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion
() && "unexpected pack arguments in template rewrite"
) ? static_cast<void> (0) : __assert_fail ("Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion() && \"unexpected pack arguments in template rewrite\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1375, __PRETTY_FUNCTION__))
;
1376 Arg = Arg.pack_begin()->getPackExpansionPattern();
1377 }
1378 assert(Arg.getKind() == TemplateArgument::Template &&((Arg.getKind() == TemplateArgument::Template && "unexpected nontype template argument kind in template rewrite"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Template && \"unexpected nontype template argument kind in template rewrite\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1379, __PRETTY_FUNCTION__))
1379 "unexpected nontype template argument kind in template rewrite")((Arg.getKind() == TemplateArgument::Template && "unexpected nontype template argument kind in template rewrite"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Template && \"unexpected nontype template argument kind in template rewrite\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1379, __PRETTY_FUNCTION__))
;
1380 return Arg.getAsTemplate();
1381 }
1382
1383 if (TTP->isParameterPack()) {
1384 assert(Arg.getKind() == TemplateArgument::Pack &&((Arg.getKind() == TemplateArgument::Pack && "Missing argument pack"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Pack && \"Missing argument pack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1385, __PRETTY_FUNCTION__))
1385 "Missing argument pack")((Arg.getKind() == TemplateArgument::Pack && "Missing argument pack"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Pack && \"Missing argument pack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1385, __PRETTY_FUNCTION__))
;
1386
1387 if (getSema().ArgumentPackSubstitutionIndex == -1) {
1388 // We have the template argument pack to substitute, but we're not
1389 // actually expanding the enclosing pack expansion yet. So, just
1390 // keep the entire argument pack.
1391 return getSema().Context.getSubstTemplateTemplateParmPack(TTP, Arg);
1392 }
1393
1394 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1395 }
1396
1397 TemplateName Template = Arg.getAsTemplate().getNameToSubstitute();
1398 assert(!Template.isNull() && "Null template template argument")((!Template.isNull() && "Null template template argument"
) ? static_cast<void> (0) : __assert_fail ("!Template.isNull() && \"Null template template argument\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1398, __PRETTY_FUNCTION__))
;
1399 assert(!Template.getAsQualifiedTemplateName() &&((!Template.getAsQualifiedTemplateName() && "template decl to substitute is qualified?"
) ? static_cast<void> (0) : __assert_fail ("!Template.getAsQualifiedTemplateName() && \"template decl to substitute is qualified?\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1400, __PRETTY_FUNCTION__))
1400 "template decl to substitute is qualified?")((!Template.getAsQualifiedTemplateName() && "template decl to substitute is qualified?"
) ? static_cast<void> (0) : __assert_fail ("!Template.getAsQualifiedTemplateName() && \"template decl to substitute is qualified?\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1400, __PRETTY_FUNCTION__))
;
1401
1402 Template = getSema().Context.getSubstTemplateTemplateParm(TTP, Template);
1403 return Template;
1404 }
1405 }
1406
1407 if (SubstTemplateTemplateParmPackStorage *SubstPack
1408 = Name.getAsSubstTemplateTemplateParmPack()) {
1409 if (getSema().ArgumentPackSubstitutionIndex == -1)
1410 return Name;
1411
1412 TemplateArgument Arg = SubstPack->getArgumentPack();
1413 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1414 return Arg.getAsTemplate().getNameToSubstitute();
1415 }
1416
1417 return inherited::TransformTemplateName(SS, Name, NameLoc, ObjectType,
1418 FirstQualifierInScope,
1419 AllowInjectedClassName);
1420}
1421
1422ExprResult
1423TemplateInstantiator::TransformPredefinedExpr(PredefinedExpr *E) {
1424 if (!E->isTypeDependent())
1425 return E;
1426
1427 return getSema().BuildPredefinedExpr(E->getLocation(), E->getIdentKind());
1428}
1429
1430ExprResult
1431TemplateInstantiator::TransformTemplateParmRefExpr(DeclRefExpr *E,
1432 NonTypeTemplateParmDecl *NTTP) {
1433 // If the corresponding template argument is NULL or non-existent, it's
1434 // because we are performing instantiation from explicitly-specified
1435 // template arguments in a function template, but there were some
1436 // arguments left unspecified.
1437 if (!TemplateArgs.hasTemplateArgument(NTTP->getDepth(),
1438 NTTP->getPosition()))
1439 return E;
1440
1441 TemplateArgument Arg = TemplateArgs(NTTP->getDepth(), NTTP->getPosition());
1442
1443 if (TemplateArgs.isRewrite()) {
1444 // We're rewriting the template parameter as a reference to another
1445 // template parameter.
1446 if (Arg.getKind() == TemplateArgument::Pack) {
1447 assert(Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion() &&((Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion
() && "unexpected pack arguments in template rewrite"
) ? static_cast<void> (0) : __assert_fail ("Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion() && \"unexpected pack arguments in template rewrite\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1448, __PRETTY_FUNCTION__))
1448 "unexpected pack arguments in template rewrite")((Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion
() && "unexpected pack arguments in template rewrite"
) ? static_cast<void> (0) : __assert_fail ("Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion() && \"unexpected pack arguments in template rewrite\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1448, __PRETTY_FUNCTION__))
;
1449 Arg = Arg.pack_begin()->getPackExpansionPattern();
1450 }
1451 assert(Arg.getKind() == TemplateArgument::Expression &&((Arg.getKind() == TemplateArgument::Expression && "unexpected nontype template argument kind in template rewrite"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Expression && \"unexpected nontype template argument kind in template rewrite\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1452, __PRETTY_FUNCTION__))
1452 "unexpected nontype template argument kind in template rewrite")((Arg.getKind() == TemplateArgument::Expression && "unexpected nontype template argument kind in template rewrite"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Expression && \"unexpected nontype template argument kind in template rewrite\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1452, __PRETTY_FUNCTION__))
;
1453 // FIXME: This can lead to the same subexpression appearing multiple times
1454 // in a complete expression.
1455 return Arg.getAsExpr();
1456 }
1457
1458 if (NTTP->isParameterPack()) {
1459 assert(Arg.getKind() == TemplateArgument::Pack &&((Arg.getKind() == TemplateArgument::Pack && "Missing argument pack"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Pack && \"Missing argument pack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1460, __PRETTY_FUNCTION__))
1460 "Missing argument pack")((Arg.getKind() == TemplateArgument::Pack && "Missing argument pack"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Pack && \"Missing argument pack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1460, __PRETTY_FUNCTION__))
;
1461
1462 if (getSema().ArgumentPackSubstitutionIndex == -1) {
1463 // We have an argument pack, but we can't select a particular argument
1464 // out of it yet. Therefore, we'll build an expression to hold on to that
1465 // argument pack.
1466 QualType TargetType = SemaRef.SubstType(NTTP->getType(), TemplateArgs,
1467 E->getLocation(),
1468 NTTP->getDeclName());
1469 if (TargetType.isNull())
1470 return ExprError();
1471
1472 QualType ExprType = TargetType.getNonLValueExprType(SemaRef.Context);
1473 if (TargetType->isRecordType())
1474 ExprType.addConst();
1475
1476 return new (SemaRef.Context) SubstNonTypeTemplateParmPackExpr(
1477 ExprType, TargetType->isReferenceType() ? VK_LValue : VK_RValue, NTTP,
1478 E->getLocation(), Arg);
1479 }
1480
1481 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1482 }
1483
1484 return transformNonTypeTemplateParmRef(NTTP, E->getLocation(), Arg);
1485}
1486
1487const LoopHintAttr *
1488TemplateInstantiator::TransformLoopHintAttr(const LoopHintAttr *LH) {
1489 Expr *TransformedExpr = getDerived().TransformExpr(LH->getValue()).get();
1490
1491 if (TransformedExpr == LH->getValue())
1492 return LH;
1493
1494 // Generate error if there is a problem with the value.
1495 if (getSema().CheckLoopHintExpr(TransformedExpr, LH->getLocation()))
1496 return LH;
1497
1498 // Create new LoopHintValueAttr with integral expression in place of the
1499 // non-type template parameter.
1500 return LoopHintAttr::CreateImplicit(getSema().Context, LH->getOption(),
1501 LH->getState(), TransformedExpr, *LH);
1502}
1503
1504ExprResult TemplateInstantiator::transformNonTypeTemplateParmRef(
1505 NonTypeTemplateParmDecl *parm,
1506 SourceLocation loc,
1507 TemplateArgument arg) {
1508 ExprResult result;
1509
1510 // Determine the substituted parameter type. We can usually infer this from
1511 // the template argument, but not always.
1512 auto SubstParamType = [&] {
1513 QualType T;
1514 if (parm->isExpandedParameterPack())
1515 T = parm->getExpansionType(SemaRef.ArgumentPackSubstitutionIndex);
1516 else
1517 T = parm->getType();
1518 if (parm->isParameterPack() && isa<PackExpansionType>(T))
1519 T = cast<PackExpansionType>(T)->getPattern();
1520 return SemaRef.SubstType(T, TemplateArgs, loc, parm->getDeclName());
1521 };
1522
1523 bool refParam = false;
1524
1525 // The template argument itself might be an expression, in which case we just
1526 // return that expression. This happens when substituting into an alias
1527 // template.
1528 if (arg.getKind() == TemplateArgument::Expression) {
1529 Expr *argExpr = arg.getAsExpr();
1530 result = argExpr;
1531 if (argExpr->isLValue()) {
1532 if (argExpr->getType()->isRecordType()) {
1533 // Check whether the parameter was actually a reference.
1534 QualType paramType = SubstParamType();
1535 if (paramType.isNull())
1536 return ExprError();
1537 refParam = paramType->isReferenceType();
1538 } else {
1539 refParam = true;
1540 }
1541 }
1542 } else if (arg.getKind() == TemplateArgument::Declaration ||
1543 arg.getKind() == TemplateArgument::NullPtr) {
1544 ValueDecl *VD;
1545 if (arg.getKind() == TemplateArgument::Declaration) {
1546 VD = arg.getAsDecl();
1547
1548 // Find the instantiation of the template argument. This is
1549 // required for nested templates.
1550 VD = cast_or_null<ValueDecl>(
1551 getSema().FindInstantiatedDecl(loc, VD, TemplateArgs));
1552 if (!VD)
1553 return ExprError();
1554 } else {
1555 // Propagate NULL template argument.
1556 VD = nullptr;
1557 }
1558
1559 QualType paramType = VD ? arg.getParamTypeForDecl() : arg.getNullPtrType();
1560 assert(!paramType.isNull() && "type substitution failed for param type")((!paramType.isNull() && "type substitution failed for param type"
) ? static_cast<void> (0) : __assert_fail ("!paramType.isNull() && \"type substitution failed for param type\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1560, __PRETTY_FUNCTION__))
;
1561 assert(!paramType->isDependentType() && "param type still dependent")((!paramType->isDependentType() && "param type still dependent"
) ? static_cast<void> (0) : __assert_fail ("!paramType->isDependentType() && \"param type still dependent\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1561, __PRETTY_FUNCTION__))
;
1562 result = SemaRef.BuildExpressionFromDeclTemplateArgument(arg, paramType, loc);
1563 refParam = paramType->isReferenceType();
1564 } else {
1565 result = SemaRef.BuildExpressionFromIntegralTemplateArgument(arg, loc);
1566 assert(result.isInvalid() ||((result.isInvalid() || SemaRef.Context.hasSameType(result.get
()->getType(), arg.getIntegralType())) ? static_cast<void
> (0) : __assert_fail ("result.isInvalid() || SemaRef.Context.hasSameType(result.get()->getType(), arg.getIntegralType())"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1568, __PRETTY_FUNCTION__))
1567 SemaRef.Context.hasSameType(result.get()->getType(),((result.isInvalid() || SemaRef.Context.hasSameType(result.get
()->getType(), arg.getIntegralType())) ? static_cast<void
> (0) : __assert_fail ("result.isInvalid() || SemaRef.Context.hasSameType(result.get()->getType(), arg.getIntegralType())"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1568, __PRETTY_FUNCTION__))
1568 arg.getIntegralType()))((result.isInvalid() || SemaRef.Context.hasSameType(result.get
()->getType(), arg.getIntegralType())) ? static_cast<void
> (0) : __assert_fail ("result.isInvalid() || SemaRef.Context.hasSameType(result.get()->getType(), arg.getIntegralType())"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1568, __PRETTY_FUNCTION__))
;
1569 }
1570
1571 if (result.isInvalid())
1572 return ExprError();
1573
1574 Expr *resultExpr = result.get();
1575 return new (SemaRef.Context) SubstNonTypeTemplateParmExpr(
1576 resultExpr->getType(), resultExpr->getValueKind(), loc, parm, refParam,
1577 resultExpr);
1578}
1579
1580ExprResult
1581TemplateInstantiator::TransformSubstNonTypeTemplateParmPackExpr(
1582 SubstNonTypeTemplateParmPackExpr *E) {
1583 if (getSema().ArgumentPackSubstitutionIndex == -1) {
1584 // We aren't expanding the parameter pack, so just return ourselves.
1585 return E;
1586 }
1587
1588 TemplateArgument Arg = E->getArgumentPack();
1589 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1590 return transformNonTypeTemplateParmRef(E->getParameterPack(),
1591 E->getParameterPackLocation(),
1592 Arg);
1593}
1594
1595ExprResult
1596TemplateInstantiator::TransformSubstNonTypeTemplateParmExpr(
1597 SubstNonTypeTemplateParmExpr *E) {
1598 ExprResult SubstReplacement = E->getReplacement();
1599 if (!isa<ConstantExpr>(SubstReplacement.get()))
1600 SubstReplacement = TransformExpr(E->getReplacement());
1601 if (SubstReplacement.isInvalid())
1602 return true;
1603 QualType SubstType = TransformType(E->getParameterType(getSema().Context));
1604 if (SubstType.isNull())
1605 return true;
1606 // The type may have been previously dependent and not now, which means we
1607 // might have to implicit cast the argument to the new type, for example:
1608 // template<auto T, decltype(T) U>
1609 // concept C = sizeof(U) == 4;
1610 // void foo() requires C<2, 'a'> { }
1611 // When normalizing foo(), we first form the normalized constraints of C:
1612 // AtomicExpr(sizeof(U) == 4,
1613 // U=SubstNonTypeTemplateParmExpr(Param=U,
1614 // Expr=DeclRef(U),
1615 // Type=decltype(T)))
1616 // Then we substitute T = 2, U = 'a' into the parameter mapping, and need to
1617 // produce:
1618 // AtomicExpr(sizeof(U) == 4,
1619 // U=SubstNonTypeTemplateParmExpr(Param=U,
1620 // Expr=ImpCast(
1621 // decltype(2),
1622 // SubstNTTPE(Param=U, Expr='a',
1623 // Type=char)),
1624 // Type=decltype(2)))
1625 // The call to CheckTemplateArgument here produces the ImpCast.
1626 TemplateArgument Converted;
1627 if (SemaRef.CheckTemplateArgument(E->getParameter(), SubstType,
1628 SubstReplacement.get(),
1629 Converted).isInvalid())
1630 return true;
1631 return transformNonTypeTemplateParmRef(E->getParameter(),
1632 E->getExprLoc(), Converted);
1633}
1634
1635ExprResult TemplateInstantiator::RebuildVarDeclRefExpr(VarDecl *PD,
1636 SourceLocation Loc) {
1637 DeclarationNameInfo NameInfo(PD->getDeclName(), Loc);
1638 return getSema().BuildDeclarationNameExpr(CXXScopeSpec(), NameInfo, PD);
1639}
1640
1641ExprResult
1642TemplateInstantiator::TransformFunctionParmPackExpr(FunctionParmPackExpr *E) {
1643 if (getSema().ArgumentPackSubstitutionIndex != -1) {
1644 // We can expand this parameter pack now.
1645 VarDecl *D = E->getExpansion(getSema().ArgumentPackSubstitutionIndex);
1646 VarDecl *VD = cast_or_null<VarDecl>(TransformDecl(E->getExprLoc(), D));
1647 if (!VD)
1648 return ExprError();
1649 return RebuildVarDeclRefExpr(VD, E->getExprLoc());
1650 }
1651
1652 QualType T = TransformType(E->getType());
1653 if (T.isNull())
1654 return ExprError();
1655
1656 // Transform each of the parameter expansions into the corresponding
1657 // parameters in the instantiation of the function decl.
1658 SmallVector<VarDecl *, 8> Vars;
1659 Vars.reserve(E->getNumExpansions());
1660 for (FunctionParmPackExpr::iterator I = E->begin(), End = E->end();
1661 I != End; ++I) {
1662 VarDecl *D = cast_or_null<VarDecl>(TransformDecl(E->getExprLoc(), *I));
1663 if (!D)
1664 return ExprError();
1665 Vars.push_back(D);
1666 }
1667
1668 auto *PackExpr =
1669 FunctionParmPackExpr::Create(getSema().Context, T, E->getParameterPack(),
1670 E->getParameterPackLocation(), Vars);
1671 getSema().MarkFunctionParmPackReferenced(PackExpr);
1672 return PackExpr;
1673}
1674
1675ExprResult
1676TemplateInstantiator::TransformFunctionParmPackRefExpr(DeclRefExpr *E,
1677 VarDecl *PD) {
1678 typedef LocalInstantiationScope::DeclArgumentPack DeclArgumentPack;
1679 llvm::PointerUnion<Decl *, DeclArgumentPack *> *Found
1680 = getSema().CurrentInstantiationScope->findInstantiationOf(PD);
1681 assert(Found && "no instantiation for parameter pack")((Found && "no instantiation for parameter pack") ? static_cast
<void> (0) : __assert_fail ("Found && \"no instantiation for parameter pack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1681, __PRETTY_FUNCTION__))
;
1682
1683 Decl *TransformedDecl;
1684 if (DeclArgumentPack *Pack = Found->dyn_cast<DeclArgumentPack *>()) {
1685 // If this is a reference to a function parameter pack which we can
1686 // substitute but can't yet expand, build a FunctionParmPackExpr for it.
1687 if (getSema().ArgumentPackSubstitutionIndex == -1) {
1688 QualType T = TransformType(E->getType());
1689 if (T.isNull())
1690 return ExprError();
1691 auto *PackExpr = FunctionParmPackExpr::Create(getSema().Context, T, PD,
1692 E->getExprLoc(), *Pack);
1693 getSema().MarkFunctionParmPackReferenced(PackExpr);
1694 return PackExpr;
1695 }
1696
1697 TransformedDecl = (*Pack)[getSema().ArgumentPackSubstitutionIndex];
1698 } else {
1699 TransformedDecl = Found->get<Decl*>();
1700 }
1701
1702 // We have either an unexpanded pack or a specific expansion.
1703 return RebuildVarDeclRefExpr(cast<VarDecl>(TransformedDecl), E->getExprLoc());
1704}
1705
1706ExprResult
1707TemplateInstantiator::TransformDeclRefExpr(DeclRefExpr *E) {
1708 NamedDecl *D = E->getDecl();
1709
1710 // Handle references to non-type template parameters and non-type template
1711 // parameter packs.
1712 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(D)) {
1713 if (NTTP->getDepth() < TemplateArgs.getNumLevels())
1714 return TransformTemplateParmRefExpr(E, NTTP);
1715
1716 // We have a non-type template parameter that isn't fully substituted;
1717 // FindInstantiatedDecl will find it in the local instantiation scope.
1718 }
1719
1720 // Handle references to function parameter packs.
1721 if (VarDecl *PD = dyn_cast<VarDecl>(D))
1722 if (PD->isParameterPack())
1723 return TransformFunctionParmPackRefExpr(E, PD);
1724
1725 return TreeTransform<TemplateInstantiator>::TransformDeclRefExpr(E);
1726}
1727
1728ExprResult TemplateInstantiator::TransformCXXDefaultArgExpr(
1729 CXXDefaultArgExpr *E) {
1730 assert(!cast<FunctionDecl>(E->getParam()->getDeclContext())->((!cast<FunctionDecl>(E->getParam()->getDeclContext
())-> getDescribedFunctionTemplate() && "Default arg expressions are never formed in dependent cases."
) ? static_cast<void> (0) : __assert_fail ("!cast<FunctionDecl>(E->getParam()->getDeclContext())-> getDescribedFunctionTemplate() && \"Default arg expressions are never formed in dependent cases.\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1732, __PRETTY_FUNCTION__))
1731 getDescribedFunctionTemplate() &&((!cast<FunctionDecl>(E->getParam()->getDeclContext
())-> getDescribedFunctionTemplate() && "Default arg expressions are never formed in dependent cases."
) ? static_cast<void> (0) : __assert_fail ("!cast<FunctionDecl>(E->getParam()->getDeclContext())-> getDescribedFunctionTemplate() && \"Default arg expressions are never formed in dependent cases.\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1732, __PRETTY_FUNCTION__))
1732 "Default arg expressions are never formed in dependent cases.")((!cast<FunctionDecl>(E->getParam()->getDeclContext
())-> getDescribedFunctionTemplate() && "Default arg expressions are never formed in dependent cases."
) ? static_cast<void> (0) : __assert_fail ("!cast<FunctionDecl>(E->getParam()->getDeclContext())-> getDescribedFunctionTemplate() && \"Default arg expressions are never formed in dependent cases.\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1732, __PRETTY_FUNCTION__))
;
1733 return SemaRef.BuildCXXDefaultArgExpr(E->getUsedLocation(),
1734 cast<FunctionDecl>(E->getParam()->getDeclContext()),
1735 E->getParam());
1736}
1737
1738template<typename Fn>
1739QualType TemplateInstantiator::TransformFunctionProtoType(TypeLocBuilder &TLB,
1740 FunctionProtoTypeLoc TL,
1741 CXXRecordDecl *ThisContext,
1742 Qualifiers ThisTypeQuals,
1743 Fn TransformExceptionSpec) {
1744 // We need a local instantiation scope for this function prototype.
1745 LocalInstantiationScope Scope(SemaRef, /*CombineWithOuterScope=*/true);
1746 return inherited::TransformFunctionProtoType(
1747 TLB, TL, ThisContext, ThisTypeQuals, TransformExceptionSpec);
1748}
1749
1750ParmVarDecl *
1751TemplateInstantiator::TransformFunctionTypeParam(ParmVarDecl *OldParm,
1752 int indexAdjustment,
1753 Optional<unsigned> NumExpansions,
1754 bool ExpectParameterPack) {
1755 auto NewParm =
1756 SemaRef.SubstParmVarDecl(OldParm, TemplateArgs, indexAdjustment,
1757 NumExpansions, ExpectParameterPack);
1758 if (NewParm && SemaRef.getLangOpts().OpenCL)
1759 SemaRef.deduceOpenCLAddressSpace(NewParm);
1760 return NewParm;
1761}
1762
1763QualType
1764TemplateInstantiator::TransformTemplateTypeParmType(TypeLocBuilder &TLB,
1765 TemplateTypeParmTypeLoc TL) {
1766 const TemplateTypeParmType *T = TL.getTypePtr();
1767 if (T->getDepth() < TemplateArgs.getNumLevels()) {
1768 // Replace the template type parameter with its corresponding
1769 // template argument.
1770
1771 // If the corresponding template argument is NULL or doesn't exist, it's
1772 // because we are performing instantiation from explicitly-specified
1773 // template arguments in a function template class, but there were some
1774 // arguments left unspecified.
1775 if (!TemplateArgs.hasTemplateArgument(T->getDepth(), T->getIndex())) {
1776 TemplateTypeParmTypeLoc NewTL
1777 = TLB.push<TemplateTypeParmTypeLoc>(TL.getType());
1778 NewTL.setNameLoc(TL.getNameLoc());
1779 return TL.getType();
1780 }
1781
1782 TemplateArgument Arg = TemplateArgs(T->getDepth(), T->getIndex());
1783
1784 if (TemplateArgs.isRewrite()) {
1785 // We're rewriting the template parameter as a reference to another
1786 // template parameter.
1787 if (Arg.getKind() == TemplateArgument::Pack) {
1788 assert(Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion() &&((Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion
() && "unexpected pack arguments in template rewrite"
) ? static_cast<void> (0) : __assert_fail ("Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion() && \"unexpected pack arguments in template rewrite\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1789, __PRETTY_FUNCTION__))
1789 "unexpected pack arguments in template rewrite")((Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion
() && "unexpected pack arguments in template rewrite"
) ? static_cast<void> (0) : __assert_fail ("Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion() && \"unexpected pack arguments in template rewrite\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1789, __PRETTY_FUNCTION__))
;
1790 Arg = Arg.pack_begin()->getPackExpansionPattern();
1791 }
1792 assert(Arg.getKind() == TemplateArgument::Type &&((Arg.getKind() == TemplateArgument::Type && "unexpected nontype template argument kind in template rewrite"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Type && \"unexpected nontype template argument kind in template rewrite\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1793, __PRETTY_FUNCTION__))
1793 "unexpected nontype template argument kind in template rewrite")((Arg.getKind() == TemplateArgument::Type && "unexpected nontype template argument kind in template rewrite"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Type && \"unexpected nontype template argument kind in template rewrite\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1793, __PRETTY_FUNCTION__))
;
1794 QualType NewT = Arg.getAsType();
1795 assert(isa<TemplateTypeParmType>(NewT) &&((isa<TemplateTypeParmType>(NewT) && "type parm not rewritten to type parm"
) ? static_cast<void> (0) : __assert_fail ("isa<TemplateTypeParmType>(NewT) && \"type parm not rewritten to type parm\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1796, __PRETTY_FUNCTION__))
1796 "type parm not rewritten to type parm")((isa<TemplateTypeParmType>(NewT) && "type parm not rewritten to type parm"
) ? static_cast<void> (0) : __assert_fail ("isa<TemplateTypeParmType>(NewT) && \"type parm not rewritten to type parm\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1796, __PRETTY_FUNCTION__))
;
1797 auto NewTL = TLB.push<TemplateTypeParmTypeLoc>(NewT);
1798 NewTL.setNameLoc(TL.getNameLoc());
1799 return NewT;
1800 }
1801
1802 if (T->isParameterPack()) {
1803 assert(Arg.getKind() == TemplateArgument::Pack &&((Arg.getKind() == TemplateArgument::Pack && "Missing argument pack"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Pack && \"Missing argument pack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1804, __PRETTY_FUNCTION__))
1804 "Missing argument pack")((Arg.getKind() == TemplateArgument::Pack && "Missing argument pack"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Pack && \"Missing argument pack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1804, __PRETTY_FUNCTION__))
;
1805
1806 if (getSema().ArgumentPackSubstitutionIndex == -1) {
1807 // We have the template argument pack, but we're not expanding the
1808 // enclosing pack expansion yet. Just save the template argument
1809 // pack for later substitution.
1810 QualType Result
1811 = getSema().Context.getSubstTemplateTypeParmPackType(T, Arg);
1812 SubstTemplateTypeParmPackTypeLoc NewTL
1813 = TLB.push<SubstTemplateTypeParmPackTypeLoc>(Result);
1814 NewTL.setNameLoc(TL.getNameLoc());
1815 return Result;
1816 }
1817
1818 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1819 }
1820
1821 assert(Arg.getKind() == TemplateArgument::Type &&((Arg.getKind() == TemplateArgument::Type && "Template argument kind mismatch"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Type && \"Template argument kind mismatch\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1822, __PRETTY_FUNCTION__))
1822 "Template argument kind mismatch")((Arg.getKind() == TemplateArgument::Type && "Template argument kind mismatch"
) ? static_cast<void> (0) : __assert_fail ("Arg.getKind() == TemplateArgument::Type && \"Template argument kind mismatch\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1822, __PRETTY_FUNCTION__))
;
1823
1824 QualType Replacement = Arg.getAsType();
1825
1826 // TODO: only do this uniquing once, at the start of instantiation.
1827 QualType Result
1828 = getSema().Context.getSubstTemplateTypeParmType(T, Replacement);
1829 SubstTemplateTypeParmTypeLoc NewTL
1830 = TLB.push<SubstTemplateTypeParmTypeLoc>(Result);
1831 NewTL.setNameLoc(TL.getNameLoc());
1832 return Result;
1833 }
1834
1835 // The template type parameter comes from an inner template (e.g.,
1836 // the template parameter list of a member template inside the
1837 // template we are instantiating). Create a new template type
1838 // parameter with the template "level" reduced by one.
1839 TemplateTypeParmDecl *NewTTPDecl = nullptr;
1840 if (TemplateTypeParmDecl *OldTTPDecl = T->getDecl())
1841 NewTTPDecl = cast_or_null<TemplateTypeParmDecl>(
1842 TransformDecl(TL.getNameLoc(), OldTTPDecl));
1843
1844 QualType Result = getSema().Context.getTemplateTypeParmType(
1845 T->getDepth() - TemplateArgs.getNumSubstitutedLevels(), T->getIndex(),
1846 T->isParameterPack(), NewTTPDecl);
1847 TemplateTypeParmTypeLoc NewTL = TLB.push<TemplateTypeParmTypeLoc>(Result);
1848 NewTL.setNameLoc(TL.getNameLoc());
1849 return Result;
1850}
1851
1852QualType
1853TemplateInstantiator::TransformSubstTemplateTypeParmPackType(
1854 TypeLocBuilder &TLB,
1855 SubstTemplateTypeParmPackTypeLoc TL) {
1856 if (getSema().ArgumentPackSubstitutionIndex == -1) {
1857 // We aren't expanding the parameter pack, so just return ourselves.
1858 SubstTemplateTypeParmPackTypeLoc NewTL
1859 = TLB.push<SubstTemplateTypeParmPackTypeLoc>(TL.getType());
1860 NewTL.setNameLoc(TL.getNameLoc());
1861 return TL.getType();
1862 }
1863
1864 TemplateArgument Arg = TL.getTypePtr()->getArgumentPack();
1865 Arg = getPackSubstitutedTemplateArgument(getSema(), Arg);
1866 QualType Result = Arg.getAsType();
1867
1868 Result = getSema().Context.getSubstTemplateTypeParmType(
1869 TL.getTypePtr()->getReplacedParameter(),
1870 Result);
1871 SubstTemplateTypeParmTypeLoc NewTL
1872 = TLB.push<SubstTemplateTypeParmTypeLoc>(Result);
1873 NewTL.setNameLoc(TL.getNameLoc());
1874 return Result;
1875}
1876
1877template<typename EntityPrinter>
1878static concepts::Requirement::SubstitutionDiagnostic *
1879createSubstDiag(Sema &S, TemplateDeductionInfo &Info, EntityPrinter Printer) {
1880 SmallString<128> Message;
1881 SourceLocation ErrorLoc;
1882 if (Info.hasSFINAEDiagnostic()) {
1883 PartialDiagnosticAt PDA(SourceLocation(),
1884 PartialDiagnostic::NullDiagnostic{});
1885 Info.takeSFINAEDiagnostic(PDA);
1886 PDA.second.EmitToString(S.getDiagnostics(), Message);
1887 ErrorLoc = PDA.first;
1888 } else {
1889 ErrorLoc = Info.getLocation();
1890 }
1891 char *MessageBuf = new (S.Context) char[Message.size()];
1892 std::copy(Message.begin(), Message.end(), MessageBuf);
1893 SmallString<128> Entity;
1894 llvm::raw_svector_ostream OS(Entity);
1895 Printer(OS);
1896 char *EntityBuf = new (S.Context) char[Entity.size()];
1897 std::copy(Entity.begin(), Entity.end(), EntityBuf);
1898 return new (S.Context) concepts::Requirement::SubstitutionDiagnostic{
1899 StringRef(EntityBuf, Entity.size()), ErrorLoc,
1900 StringRef(MessageBuf, Message.size())};
1901}
1902
1903concepts::TypeRequirement *
1904TemplateInstantiator::TransformTypeRequirement(concepts::TypeRequirement *Req) {
1905 if (!Req->isDependent() && !AlwaysRebuild())
1906 return Req;
1907 if (Req->isSubstitutionFailure()) {
1908 if (AlwaysRebuild())
1909 return RebuildTypeRequirement(
1910 Req->getSubstitutionDiagnostic());
1911 return Req;
1912 }
1913
1914 Sema::SFINAETrap Trap(SemaRef);
1915 TemplateDeductionInfo Info(Req->getType()->getTypeLoc().getBeginLoc());
1916 Sema::InstantiatingTemplate TypeInst(SemaRef,
1917 Req->getType()->getTypeLoc().getBeginLoc(), Req, Info,
1918 Req->getType()->getTypeLoc().getSourceRange());
1919 if (TypeInst.isInvalid())
1920 return nullptr;
1921 TypeSourceInfo *TransType = TransformType(Req->getType());
1922 if (!TransType || Trap.hasErrorOccurred())
1923 return RebuildTypeRequirement(createSubstDiag(SemaRef, Info,
1924 [&] (llvm::raw_ostream& OS) {
1925 Req->getType()->getType().print(OS, SemaRef.getPrintingPolicy());
1926 }));
1927 return RebuildTypeRequirement(TransType);
1928}
1929
1930concepts::ExprRequirement *
1931TemplateInstantiator::TransformExprRequirement(concepts::ExprRequirement *Req) {
1932 if (!Req->isDependent() && !AlwaysRebuild())
1933 return Req;
1934
1935 Sema::SFINAETrap Trap(SemaRef);
1936 TemplateDeductionInfo Info(Req->getExpr()->getBeginLoc());
1937
1938 llvm::PointerUnion<Expr *, concepts::Requirement::SubstitutionDiagnostic *>
1939 TransExpr;
1940 if (Req->isExprSubstitutionFailure())
1941 TransExpr = Req->getExprSubstitutionDiagnostic();
1942 else {
1943 Sema::InstantiatingTemplate ExprInst(SemaRef, Req->getExpr()->getBeginLoc(),
1944 Req, Info,
1945 Req->getExpr()->getSourceRange());
1946 if (ExprInst.isInvalid())
1947 return nullptr;
1948 ExprResult TransExprRes = TransformExpr(Req->getExpr());
1949 if (TransExprRes.isInvalid() || Trap.hasErrorOccurred())
1950 TransExpr = createSubstDiag(SemaRef, Info,
1951 [&] (llvm::raw_ostream& OS) {
1952 Req->getExpr()->printPretty(OS, nullptr,
1953 SemaRef.getPrintingPolicy());
1954 });
1955 else
1956 TransExpr = TransExprRes.get();
1957 }
1958
1959 llvm::Optional<concepts::ExprRequirement::ReturnTypeRequirement> TransRetReq;
1960 const auto &RetReq = Req->getReturnTypeRequirement();
1961 if (RetReq.isEmpty())
1962 TransRetReq.emplace();
1963 else if (RetReq.isSubstitutionFailure())
1964 TransRetReq.emplace(RetReq.getSubstitutionDiagnostic());
1965 else if (RetReq.isTypeConstraint()) {
1966 TemplateParameterList *OrigTPL =
1967 RetReq.getTypeConstraintTemplateParameterList();
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() &&((TransRetReq.hasValue() && "All code paths leading here must set TransRetReq"
) ? static_cast<void> (0) : __assert_fail ("TransRetReq.hasValue() && \"All code paths leading here must set TransRetReq\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1986, __PRETTY_FUNCTION__))
1986 "All code paths leading here must set TransRetReq")((TransRetReq.hasValue() && "All code paths leading here must set TransRetReq"
) ? static_cast<void> (0) : __assert_fail ("TransRetReq.hasValue() && \"All code paths leading here must set TransRetReq\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 1986, __PRETTY_FUNCTION__))
;
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() &&((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2071, __PRETTY_FUNCTION__))
2070 "Cannot perform an instantiation without some context on the "((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2071, __PRETTY_FUNCTION__))
2071 "instantiation stack")((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2071, __PRETTY_FUNCTION__))
;
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() &&((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2088, __PRETTY_FUNCTION__))
2087 "Cannot perform an instantiation without some context on the "((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2088, __PRETTY_FUNCTION__))
2088 "instantiation stack")((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2088, __PRETTY_FUNCTION__))
;
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() &&((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2118, __PRETTY_FUNCTION__))
2117 "Cannot perform an instantiation without some context on the "((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2118, __PRETTY_FUNCTION__))
2118 "instantiation stack")((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2118, __PRETTY_FUNCTION__))
;
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() &&((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2163, __PRETTY_FUNCTION__))
2162 "Cannot perform an instantiation without some context on the "((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2163, __PRETTY_FUNCTION__))
2163 "instantiation stack")((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2163, __PRETTY_FUNCTION__))
;
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)((ESI.Type != EST_Uninstantiated) ? static_cast<void> (
0) : __assert_fail ("ESI.Type != EST_Uninstantiated", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2201, __PRETTY_FUNCTION__))
;
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(), &InstArgs, 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() &&((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2474, __PRETTY_FUNCTION__))
2473 "Cannot perform an instantiation without some context on the "((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2474, __PRETTY_FUNCTION__))
2474 "instantiation stack")((!CodeSynthesisContexts.empty() && "Cannot perform an instantiation without some context on the "
"instantiation stack") ? static_cast<void> (0) : __assert_fail
("!CodeSynthesisContexts.empty() && \"Cannot perform an instantiation without some context on the \" \"instantiation stack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2474, __PRETTY_FUNCTION__))
;
2475
2476 TemplateInstantiator Instantiator(*this, TemplateArgs, Loc,
2477 DeclarationName());
2478 return Instantiator.TransformFunctionTypeParams(
2479 Loc, Params, nullptr, ExtParamInfos, ParamTypes, OutParams, ParamInfos);
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")((!Inst.isAlreadyInstantiating() && "should have been caught by caller"
) ? static_cast<void> (0) : __assert_fail ("!Inst.isAlreadyInstantiating() && \"should have been caught by caller\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2661, __PRETTY_FUNCTION__))
;
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")((MSInfo && "no spec info for member enum specialization"
) ? static_cast<void> (0) : __assert_fail ("MSInfo && \"no spec info for member enum specialization\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2745, __PRETTY_FUNCTION__))
;
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())((CurrentInstantiationScope == Instantiator.getStartingScope(
)) ? static_cast<void> (0) : __assert_fail ("CurrentInstantiationScope == Instantiator.getStartingScope()"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2787, __PRETTY_FUNCTION__))
;
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 PerformDependentDiagnostics(Pattern, TemplateArgs);
2820
2821 // Instantiate any out-of-line class template partial
2822 // specializations now.
2823 for (TemplateDeclInstantiator::delayed_partial_spec_iterator
2824 P = Instantiator.delayed_partial_spec_begin(),
2825 PEnd = Instantiator.delayed_partial_spec_end();
2826 P != PEnd; ++P) {
2827 if (!Instantiator.InstantiateClassTemplatePartialSpecialization(
2828 P->first, P->second)) {
2829 Instantiation->setInvalidDecl();
2830 break;
2831 }
2832 }
2833
2834 // Instantiate any out-of-line variable template partial
2835 // specializations now.
2836 for (TemplateDeclInstantiator::delayed_var_partial_spec_iterator
2837 P = Instantiator.delayed_var_partial_spec_begin(),
2838 PEnd = Instantiator.delayed_var_partial_spec_end();
2839 P != PEnd; ++P) {
2840 if (!Instantiator.InstantiateVarTemplatePartialSpecialization(
2841 P->first, P->second)) {
2842 Instantiation->setInvalidDecl();
2843 break;
2844 }
2845 }
2846 }
2847
2848 // Exit the scope of this instantiation.
2849 SavedContext.pop();
2850
2851 if (!Instantiation->isInvalidDecl()) {
2852 // Always emit the vtable for an explicit instantiation definition
2853 // of a polymorphic class template specialization. Otherwise, eagerly
2854 // instantiate only constexpr virtual functions in preparation for their use
2855 // in constant evaluation.
2856 if (TSK == TSK_ExplicitInstantiationDefinition)
2857 MarkVTableUsed(PointOfInstantiation, Instantiation, true);
2858 else if (MightHaveConstexprVirtualFunctions)
2859 MarkVirtualMembersReferenced(PointOfInstantiation, Instantiation,
2860 /*ConstexprOnly*/ true);
2861 }
2862
2863 Consumer.HandleTagDeclDefinition(Instantiation);
2864
2865 return Instantiation->isInvalidDecl();
2866}
2867
2868/// Instantiate the definition of an enum from a given pattern.
2869///
2870/// \param PointOfInstantiation The point of instantiation within the
2871/// source code.
2872/// \param Instantiation is the declaration whose definition is being
2873/// instantiated. This will be a member enumeration of a class
2874/// temploid specialization, or a local enumeration within a
2875/// function temploid specialization.
2876/// \param Pattern The templated declaration from which the instantiation
2877/// occurs.
2878/// \param TemplateArgs The template arguments to be substituted into
2879/// the pattern.
2880/// \param TSK The kind of implicit or explicit instantiation to perform.
2881///
2882/// \return \c true if an error occurred, \c false otherwise.
2883bool Sema::InstantiateEnum(SourceLocation PointOfInstantiation,
2884 EnumDecl *Instantiation, EnumDecl *Pattern,
2885 const MultiLevelTemplateArgumentList &TemplateArgs,
2886 TemplateSpecializationKind TSK) {
2887 EnumDecl *PatternDef = Pattern->getDefinition();
2888 if (DiagnoseUninstantiableTemplate(PointOfInstantiation, Instantiation,
2889 Instantiation->getInstantiatedFromMemberEnum(),
2890 Pattern, PatternDef, TSK,/*Complain*/true))
2891 return true;
2892 Pattern = PatternDef;
2893
2894 // Record the point of instantiation.
2895 if (MemberSpecializationInfo *MSInfo
2896 = Instantiation->getMemberSpecializationInfo()) {
2897 MSInfo->setTemplateSpecializationKind(TSK);
2898 MSInfo->setPointOfInstantiation(PointOfInstantiation);
2899 }
2900
2901 InstantiatingTemplate Inst(*this, PointOfInstantiation, Instantiation);
2902 if (Inst.isInvalid())
2903 return true;
2904 if (Inst.isAlreadyInstantiating())
2905 return false;
2906 PrettyDeclStackTraceEntry CrashInfo(Context, Instantiation, SourceLocation(),
2907 "instantiating enum definition");
2908
2909 // The instantiation is visible here, even if it was first declared in an
2910 // unimported module.
2911 Instantiation->setVisibleDespiteOwningModule();
2912
2913 // Enter the scope of this instantiation. We don't use
2914 // PushDeclContext because we don't have a scope.
2915 ContextRAII SavedContext(*this, Instantiation);
2916 EnterExpressionEvaluationContext EvalContext(
2917 *this, Sema::ExpressionEvaluationContext::PotentiallyEvaluated);
2918
2919 LocalInstantiationScope Scope(*this, /*MergeWithParentScope*/true);
2920
2921 // Pull attributes from the pattern onto the instantiation.
2922 InstantiateAttrs(TemplateArgs, Pattern, Instantiation);
2923
2924 TemplateDeclInstantiator Instantiator(*this, Instantiation, TemplateArgs);
2925 Instantiator.InstantiateEnumDefinition(Instantiation, Pattern);
2926
2927 // Exit the scope of this instantiation.
2928 SavedContext.pop();
2929
2930 return Instantiation->isInvalidDecl();
2931}
2932
2933
2934/// Instantiate the definition of a field from the given pattern.
2935///
2936/// \param PointOfInstantiation The point of instantiation within the
2937/// source code.
2938/// \param Instantiation is the declaration whose definition is being
2939/// instantiated. This will be a class of a class temploid
2940/// specialization, or a local enumeration within a function temploid
2941/// specialization.
2942/// \param Pattern The templated declaration from which the instantiation
2943/// occurs.
2944/// \param TemplateArgs The template arguments to be substituted into
2945/// the pattern.
2946///
2947/// \return \c true if an error occurred, \c false otherwise.
2948bool Sema::InstantiateInClassInitializer(
2949 SourceLocation PointOfInstantiation, FieldDecl *Instantiation,
2950 FieldDecl *Pattern, const MultiLevelTemplateArgumentList &TemplateArgs) {
2951 // If there is no initializer, we don't need to do anything.
2952 if (!Pattern->hasInClassInitializer())
2953 return false;
2954
2955 assert(Instantiation->getInClassInitStyle() ==((Instantiation->getInClassInitStyle() == Pattern->getInClassInitStyle
() && "pattern and instantiation disagree about init style"
) ? static_cast<void> (0) : __assert_fail ("Instantiation->getInClassInitStyle() == Pattern->getInClassInitStyle() && \"pattern and instantiation disagree about init style\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2957, __PRETTY_FUNCTION__))
2956 Pattern->getInClassInitStyle() &&((Instantiation->getInClassInitStyle() == Pattern->getInClassInitStyle
() && "pattern and instantiation disagree about init style"
) ? static_cast<void> (0) : __assert_fail ("Instantiation->getInClassInitStyle() == Pattern->getInClassInitStyle() && \"pattern and instantiation disagree about init style\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2957, __PRETTY_FUNCTION__))
2957 "pattern and instantiation disagree about init style")((Instantiation->getInClassInitStyle() == Pattern->getInClassInitStyle
() && "pattern and instantiation disagree about init style"
) ? static_cast<void> (0) : __assert_fail ("Instantiation->getInClassInitStyle() == Pattern->getInClassInitStyle() && \"pattern and instantiation disagree about init style\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 2957, __PRETTY_FUNCTION__))
;
2958
2959 // Error out if we haven't parsed the initializer of the pattern yet because
2960 // we are waiting for the closing brace of the outer class.
2961 Expr *OldInit = Pattern->getInClassInitializer();
2962 if (!OldInit) {
2963 RecordDecl *PatternRD = Pattern->getParent();
2964 RecordDecl *OutermostClass = PatternRD->getOuterLexicalRecordContext();
2965 Diag(PointOfInstantiation,
2966 diag::err_default_member_initializer_not_yet_parsed)
2967 << OutermostClass << Pattern;
2968 Diag(Pattern->getEndLoc(),
2969 diag::note_default_member_initializer_not_yet_parsed);
2970 Instantiation->setInvalidDecl();
2971 return true;
2972 }
2973
2974 InstantiatingTemplate Inst(*this, PointOfInstantiation, Instantiation);
2975 if (Inst.isInvalid())
2976 return true;
2977 if (Inst.isAlreadyInstantiating()) {
2978 // Error out if we hit an instantiation cycle for this initializer.
2979 Diag(PointOfInstantiation, diag::err_default_member_initializer_cycle)
2980 << Instantiation;
2981 return true;
2982 }
2983 PrettyDeclStackTraceEntry CrashInfo(Context, Instantiation, SourceLocation(),
2984 "instantiating default member init");
2985
2986 // Enter the scope of this instantiation. We don't use PushDeclContext because
2987 // we don't have a scope.
2988 ContextRAII SavedContext(*this, Instantiation->getParent());
2989 EnterExpressionEvaluationContext EvalContext(
2990 *this, Sema::ExpressionEvaluationContext::PotentiallyEvaluated);
2991
2992 LocalInstantiationScope Scope(*this, true);
2993
2994 // Instantiate the initializer.
2995 ActOnStartCXXInClassMemberInitializer();
2996 CXXThisScopeRAII ThisScope(*this, Instantiation->getParent(), Qualifiers());
2997
2998 ExprResult NewInit = SubstInitializer(OldInit, TemplateArgs,
2999 /*CXXDirectInit=*/false);
3000 Expr *Init = NewInit.get();
3001 assert((!Init || !isa<ParenListExpr>(Init)) && "call-style init in class")(((!Init || !isa<ParenListExpr>(Init)) && "call-style init in class"
) ? static_cast<void> (0) : __assert_fail ("(!Init || !isa<ParenListExpr>(Init)) && \"call-style init in class\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3001, __PRETTY_FUNCTION__))
;
3002 ActOnFinishCXXInClassMemberInitializer(
3003 Instantiation, Init ? Init->getBeginLoc() : SourceLocation(), Init);
3004
3005 if (auto *L = getASTMutationListener())
3006 L->DefaultMemberInitializerInstantiated(Instantiation);
3007
3008 // Return true if the in-class initializer is still missing.
3009 return !Instantiation->getInClassInitializer();
3010}
3011
3012namespace {
3013 /// A partial specialization whose template arguments have matched
3014 /// a given template-id.
3015 struct PartialSpecMatchResult {
3016 ClassTemplatePartialSpecializationDecl *Partial;
3017 TemplateArgumentList *Args;
3018 };
3019}
3020
3021bool Sema::usesPartialOrExplicitSpecialization(
3022 SourceLocation Loc, ClassTemplateSpecializationDecl *ClassTemplateSpec) {
3023 if (ClassTemplateSpec->getTemplateSpecializationKind() ==
3024 TSK_ExplicitSpecialization)
3025 return true;
3026
3027 SmallVector<ClassTemplatePartialSpecializationDecl *, 4> PartialSpecs;
3028 ClassTemplateSpec->getSpecializedTemplate()
3029 ->getPartialSpecializations(PartialSpecs);
3030 for (unsigned I = 0, N = PartialSpecs.size(); I != N; ++I) {
3031 TemplateDeductionInfo Info(Loc);
3032 if (!DeduceTemplateArguments(PartialSpecs[I],
3033 ClassTemplateSpec->getTemplateArgs(), Info))
3034 return true;
3035 }
3036
3037 return false;
3038}
3039
3040/// Get the instantiation pattern to use to instantiate the definition of a
3041/// given ClassTemplateSpecializationDecl (either the pattern of the primary
3042/// template or of a partial specialization).
3043static ActionResult<CXXRecordDecl *>
3044getPatternForClassTemplateSpecialization(
3045 Sema &S, SourceLocation PointOfInstantiation,
3046 ClassTemplateSpecializationDecl *ClassTemplateSpec,
3047 TemplateSpecializationKind TSK) {
3048 Sema::InstantiatingTemplate Inst(S, PointOfInstantiation, ClassTemplateSpec);
3049 if (Inst.isInvalid())
3050 return {/*Invalid=*/true};
3051 if (Inst.isAlreadyInstantiating())
3052 return {/*Invalid=*/false};
3053
3054 llvm::PointerUnion<ClassTemplateDecl *,
3055 ClassTemplatePartialSpecializationDecl *>
3056 Specialized = ClassTemplateSpec->getSpecializedTemplateOrPartial();
3057 if (!Specialized.is<ClassTemplatePartialSpecializationDecl *>()) {
3058 // Find best matching specialization.
3059 ClassTemplateDecl *Template = ClassTemplateSpec->getSpecializedTemplate();
3060
3061 // C++ [temp.class.spec.match]p1:
3062 // When a class template is used in a context that requires an
3063 // instantiation of the class, it is necessary to determine
3064 // whether the instantiation is to be generated using the primary
3065 // template or one of the partial specializations. This is done by
3066 // matching the template arguments of the class template
3067 // specialization with the template argument lists of the partial
3068 // specializations.
3069 typedef PartialSpecMatchResult MatchResult;
3070 SmallVector<MatchResult, 4> Matched;
3071 SmallVector<ClassTemplatePartialSpecializationDecl *, 4> PartialSpecs;
3072 Template->getPartialSpecializations(PartialSpecs);
3073 TemplateSpecCandidateSet FailedCandidates(PointOfInstantiation);
3074 for (unsigned I = 0, N = PartialSpecs.size(); I != N; ++I) {
3075 ClassTemplatePartialSpecializationDecl *Partial = PartialSpecs[I];
3076 TemplateDeductionInfo Info(FailedCandidates.getLocation());
3077 if (Sema::TemplateDeductionResult Result = S.DeduceTemplateArguments(
3078 Partial, ClassTemplateSpec->getTemplateArgs(), Info)) {
3079 // Store the failed-deduction information for use in diagnostics, later.
3080 // TODO: Actually use the failed-deduction info?
3081 FailedCandidates.addCandidate().set(
3082 DeclAccessPair::make(Template, AS_public), Partial,
3083 MakeDeductionFailureInfo(S.Context, Result, Info));
3084 (void)Result;
3085 } else {
3086 Matched.push_back(PartialSpecMatchResult());
3087 Matched.back().Partial = Partial;
3088 Matched.back().Args = Info.take();
3089 }
3090 }
3091
3092 // If we're dealing with a member template where the template parameters
3093 // have been instantiated, this provides the original template parameters
3094 // from which the member template's parameters were instantiated.
3095
3096 if (Matched.size() >= 1) {
3097 SmallVectorImpl<MatchResult>::iterator Best = Matched.begin();
3098 if (Matched.size() == 1) {
3099 // -- If exactly one matching specialization is found, the
3100 // instantiation is generated from that specialization.
3101 // We don't need to do anything for this.
3102 } else {
3103 // -- If more than one matching specialization is found, the
3104 // partial order rules (14.5.4.2) are used to determine
3105 // whether one of the specializations is more specialized
3106 // than the others. If none of the specializations is more
3107 // specialized than all of the other matching
3108 // specializations, then the use of the class template is
3109 // ambiguous and the program is ill-formed.
3110 for (SmallVectorImpl<MatchResult>::iterator P = Best + 1,
3111 PEnd = Matched.end();
3112 P != PEnd; ++P) {
3113 if (S.getMoreSpecializedPartialSpecialization(
3114 P->Partial, Best->Partial, PointOfInstantiation) ==
3115 P->Partial)
3116 Best = P;
3117 }
3118
3119 // Determine if the best partial specialization is more specialized than
3120 // the others.
3121 bool Ambiguous = false;
3122 for (SmallVectorImpl<MatchResult>::iterator P = Matched.begin(),
3123 PEnd = Matched.end();
3124 P != PEnd; ++P) {
3125 if (P != Best && S.getMoreSpecializedPartialSpecialization(
3126 P->Partial, Best->Partial,
3127 PointOfInstantiation) != Best->Partial) {
3128 Ambiguous = true;
3129 break;
3130 }
3131 }
3132
3133 if (Ambiguous) {
3134 // Partial ordering did not produce a clear winner. Complain.
3135 Inst.Clear();
3136 ClassTemplateSpec->setInvalidDecl();
3137 S.Diag(PointOfInstantiation,
3138 diag::err_partial_spec_ordering_ambiguous)
3139 << ClassTemplateSpec;
3140
3141 // Print the matching partial specializations.
3142 for (SmallVectorImpl<MatchResult>::iterator P = Matched.begin(),
3143 PEnd = Matched.end();
3144 P != PEnd; ++P)
3145 S.Diag(P->Partial->getLocation(), diag::note_partial_spec_match)
3146 << S.getTemplateArgumentBindingsText(
3147 P->Partial->getTemplateParameters(), *P->Args);
3148
3149 return {/*Invalid=*/true};
3150 }
3151 }
3152
3153 ClassTemplateSpec->setInstantiationOf(Best->Partial, Best->Args);
3154 } else {
3155 // -- If no matches are found, the instantiation is generated
3156 // from the primary template.
3157 }
3158 }
3159
3160 CXXRecordDecl *Pattern = nullptr;
3161 Specialized = ClassTemplateSpec->getSpecializedTemplateOrPartial();
3162 if (auto *PartialSpec =
3163 Specialized.dyn_cast<ClassTemplatePartialSpecializationDecl *>()) {
3164 // Instantiate using the best class template partial specialization.
3165 while (PartialSpec->getInstantiatedFromMember()) {
3166 // If we've found an explicit specialization of this class template,
3167 // stop here and use that as the pattern.
3168 if (PartialSpec->isMemberSpecialization())
3169 break;
3170
3171 PartialSpec = PartialSpec->getInstantiatedFromMember();
3172 }
3173 Pattern = PartialSpec;
3174 } else {
3175 ClassTemplateDecl *Template = ClassTemplateSpec->getSpecializedTemplate();
3176 while (Template->getInstantiatedFromMemberTemplate()) {
3177 // If we've found an explicit specialization of this class template,
3178 // stop here and use that as the pattern.
3179 if (Template->isMemberSpecialization())
3180 break;
3181
3182 Template = Template->getInstantiatedFromMemberTemplate();
3183 }
3184 Pattern = Template->getTemplatedDecl();
3185 }
3186
3187 return Pattern;
3188}
3189
3190bool Sema::InstantiateClassTemplateSpecialization(
3191 SourceLocation PointOfInstantiation,
3192 ClassTemplateSpecializationDecl *ClassTemplateSpec,
3193 TemplateSpecializationKind TSK, bool Complain) {
3194 // Perform the actual instantiation on the canonical declaration.
3195 ClassTemplateSpec = cast<ClassTemplateSpecializationDecl>(
3196 ClassTemplateSpec->getCanonicalDecl());
3197 if (ClassTemplateSpec->isInvalidDecl())
3198 return true;
3199
3200 ActionResult<CXXRecordDecl *> Pattern =
3201 getPatternForClassTemplateSpecialization(*this, PointOfInstantiation,
3202 ClassTemplateSpec, TSK);
3203 if (!Pattern.isUsable())
3204 return Pattern.isInvalid();
3205
3206 return InstantiateClass(
3207 PointOfInstantiation, ClassTemplateSpec, Pattern.get(),
3208 getTemplateInstantiationArgs(ClassTemplateSpec), TSK, Complain);
3209}
3210
3211/// Instantiates the definitions of all of the member
3212/// of the given class, which is an instantiation of a class template
3213/// or a member class of a template.
3214void
3215Sema::InstantiateClassMembers(SourceLocation PointOfInstantiation,
3216 CXXRecordDecl *Instantiation,
3217 const MultiLevelTemplateArgumentList &TemplateArgs,
3218 TemplateSpecializationKind TSK) {
3219 // FIXME: We need to notify the ASTMutationListener that we did all of these
3220 // things, in case we have an explicit instantiation definition in a PCM, a
3221 // module, or preamble, and the declaration is in an imported AST.
3222 assert((((TSK == TSK_ExplicitInstantiationDefinition || TSK == TSK_ExplicitInstantiationDeclaration
|| (TSK == TSK_ImplicitInstantiation && Instantiation
->isLocalClass())) && "Unexpected template specialization kind!"
) ? static_cast<void> (0) : __assert_fail ("(TSK == TSK_ExplicitInstantiationDefinition || TSK == TSK_ExplicitInstantiationDeclaration || (TSK == TSK_ImplicitInstantiation && Instantiation->isLocalClass())) && \"Unexpected template specialization kind!\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3226, __PRETTY_FUNCTION__))
3223 (TSK == TSK_ExplicitInstantiationDefinition ||(((TSK == TSK_ExplicitInstantiationDefinition || TSK == TSK_ExplicitInstantiationDeclaration
|| (TSK == TSK_ImplicitInstantiation && Instantiation
->isLocalClass())) && "Unexpected template specialization kind!"
) ? static_cast<void> (0) : __assert_fail ("(TSK == TSK_ExplicitInstantiationDefinition || TSK == TSK_ExplicitInstantiationDeclaration || (TSK == TSK_ImplicitInstantiation && Instantiation->isLocalClass())) && \"Unexpected template specialization kind!\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3226, __PRETTY_FUNCTION__))
3224 TSK == TSK_ExplicitInstantiationDeclaration ||(((TSK == TSK_ExplicitInstantiationDefinition || TSK == TSK_ExplicitInstantiationDeclaration
|| (TSK == TSK_ImplicitInstantiation && Instantiation
->isLocalClass())) && "Unexpected template specialization kind!"
) ? static_cast<void> (0) : __assert_fail ("(TSK == TSK_ExplicitInstantiationDefinition || TSK == TSK_ExplicitInstantiationDeclaration || (TSK == TSK_ImplicitInstantiation && Instantiation->isLocalClass())) && \"Unexpected template specialization kind!\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3226, __PRETTY_FUNCTION__))
3225 (TSK == TSK_ImplicitInstantiation && Instantiation->isLocalClass())) &&(((TSK == TSK_ExplicitInstantiationDefinition || TSK == TSK_ExplicitInstantiationDeclaration
|| (TSK == TSK_ImplicitInstantiation && Instantiation
->isLocalClass())) && "Unexpected template specialization kind!"
) ? static_cast<void> (0) : __assert_fail ("(TSK == TSK_ExplicitInstantiationDefinition || TSK == TSK_ExplicitInstantiationDeclaration || (TSK == TSK_ImplicitInstantiation && Instantiation->isLocalClass())) && \"Unexpected template specialization kind!\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3226, __PRETTY_FUNCTION__))
3226 "Unexpected template specialization kind!")(((TSK == TSK_ExplicitInstantiationDefinition || TSK == TSK_ExplicitInstantiationDeclaration
|| (TSK == TSK_ImplicitInstantiation && Instantiation
->isLocalClass())) && "Unexpected template specialization kind!"
) ? static_cast<void> (0) : __assert_fail ("(TSK == TSK_ExplicitInstantiationDefinition || TSK == TSK_ExplicitInstantiationDeclaration || (TSK == TSK_ImplicitInstantiation && Instantiation->isLocalClass())) && \"Unexpected template specialization kind!\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3226, __PRETTY_FUNCTION__))
;
3227 for (auto *D : Instantiation->decls()) {
3228 bool SuppressNew = false;
3229 if (auto *Function = dyn_cast<FunctionDecl>(D)) {
3230 if (FunctionDecl *Pattern =
3231 Function->getInstantiatedFromMemberFunction()) {
3232
3233 if (Function->hasAttr<ExcludeFromExplicitInstantiationAttr>())
3234 continue;
3235
3236 MemberSpecializationInfo *MSInfo =
3237 Function->getMemberSpecializationInfo();
3238 assert(MSInfo && "No member specialization information?")((MSInfo && "No member specialization information?") ?
static_cast<void> (0) : __assert_fail ("MSInfo && \"No member specialization information?\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3238, __PRETTY_FUNCTION__))
;
3239 if (MSInfo->getTemplateSpecializationKind()
3240 == TSK_ExplicitSpecialization)
3241 continue;
3242
3243 if (CheckSpecializationInstantiationRedecl(PointOfInstantiation, TSK,
3244 Function,
3245 MSInfo->getTemplateSpecializationKind(),
3246 MSInfo->getPointOfInstantiation(),
3247 SuppressNew) ||
3248 SuppressNew)
3249 continue;
3250
3251 // C++11 [temp.explicit]p8:
3252 // An explicit instantiation definition that names a class template
3253 // specialization explicitly instantiates the class template
3254 // specialization and is only an explicit instantiation definition
3255 // of members whose definition is visible at the point of
3256 // instantiation.
3257 if (TSK == TSK_ExplicitInstantiationDefinition && !Pattern->isDefined())
3258 continue;
3259
3260 Function->setTemplateSpecializationKind(TSK, PointOfInstantiation);
3261
3262 if (Function->isDefined()) {
3263 // Let the ASTConsumer know that this function has been explicitly
3264 // instantiated now, and its linkage might have changed.
3265 Consumer.HandleTopLevelDecl(DeclGroupRef(Function));
3266 } else if (TSK == TSK_ExplicitInstantiationDefinition) {
3267 InstantiateFunctionDefinition(PointOfInstantiation, Function);
3268 } else if (TSK == TSK_ImplicitInstantiation) {
3269 PendingLocalImplicitInstantiations.push_back(
3270 std::make_pair(Function, PointOfInstantiation));
3271 }
3272 }
3273 } else if (auto *Var = dyn_cast<VarDecl>(D)) {
3274 if (isa<VarTemplateSpecializationDecl>(Var))
3275 continue;
3276
3277 if (Var->isStaticDataMember()) {
3278 if (Var->hasAttr<ExcludeFromExplicitInstantiationAttr>())
3279 continue;
3280
3281 MemberSpecializationInfo *MSInfo = Var->getMemberSpecializationInfo();
3282 assert(MSInfo && "No member specialization information?")((MSInfo && "No member specialization information?") ?
static_cast<void> (0) : __assert_fail ("MSInfo && \"No member specialization information?\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3282, __PRETTY_FUNCTION__))
;
3283 if (MSInfo->getTemplateSpecializationKind()
3284 == TSK_ExplicitSpecialization)
3285 continue;
3286
3287 if (CheckSpecializationInstantiationRedecl(PointOfInstantiation, TSK,
3288 Var,
3289 MSInfo->getTemplateSpecializationKind(),
3290 MSInfo->getPointOfInstantiation(),
3291 SuppressNew) ||
3292 SuppressNew)
3293 continue;
3294
3295 if (TSK == TSK_ExplicitInstantiationDefinition) {
3296 // C++0x [temp.explicit]p8:
3297 // An explicit instantiation definition that names a class template
3298 // specialization explicitly instantiates the class template
3299 // specialization and is only an explicit instantiation definition
3300 // of members whose definition is visible at the point of
3301 // instantiation.
3302 if (!Var->getInstantiatedFromStaticDataMember()->getDefinition())
3303 continue;
3304
3305 Var->setTemplateSpecializationKind(TSK, PointOfInstantiation);
3306 InstantiateVariableDefinition(PointOfInstantiation, Var);
3307 } else {
3308 Var->setTemplateSpecializationKind(TSK, PointOfInstantiation);
3309 }
3310 }
3311 } else if (auto *Record = dyn_cast<CXXRecordDecl>(D)) {
3312 if (Record->hasAttr<ExcludeFromExplicitInstantiationAttr>())
3313 continue;
3314
3315 // Always skip the injected-class-name, along with any
3316 // redeclarations of nested classes, since both would cause us
3317 // to try to instantiate the members of a class twice.
3318 // Skip closure types; they'll get instantiated when we instantiate
3319 // the corresponding lambda-expression.
3320 if (Record->isInjectedClassName() || Record->getPreviousDecl() ||
3321 Record->isLambda())
3322 continue;
3323
3324 MemberSpecializationInfo *MSInfo = Record->getMemberSpecializationInfo();
3325 assert(MSInfo && "No member specialization information?")((MSInfo && "No member specialization information?") ?
static_cast<void> (0) : __assert_fail ("MSInfo && \"No member specialization information?\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3325, __PRETTY_FUNCTION__))
;
3326
3327 if (MSInfo->getTemplateSpecializationKind()
3328 == TSK_ExplicitSpecialization)
3329 continue;
3330
3331 if (Context.getTargetInfo().getTriple().isOSWindows() &&
3332 TSK == TSK_ExplicitInstantiationDeclaration) {
3333 // On Windows, explicit instantiation decl of the outer class doesn't
3334 // affect the inner class. Typically extern template declarations are
3335 // used in combination with dll import/export annotations, but those
3336 // are not propagated from the outer class templates to inner classes.
3337 // Therefore, do not instantiate inner classes on this platform, so
3338 // that users don't end up with undefined symbols during linking.
3339 continue;
3340 }
3341
3342 if (CheckSpecializationInstantiationRedecl(PointOfInstantiation, TSK,
3343 Record,
3344 MSInfo->getTemplateSpecializationKind(),
3345 MSInfo->getPointOfInstantiation(),
3346 SuppressNew) ||
3347 SuppressNew)
3348 continue;
3349
3350 CXXRecordDecl *Pattern = Record->getInstantiatedFromMemberClass();
3351 assert(Pattern && "Missing instantiated-from-template information")((Pattern && "Missing instantiated-from-template information"
) ? static_cast<void> (0) : __assert_fail ("Pattern && \"Missing instantiated-from-template information\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3351, __PRETTY_FUNCTION__))
;
3352
3353 if (!Record->getDefinition()) {
3354 if (!Pattern->getDefinition()) {
3355 // C++0x [temp.explicit]p8:
3356 // An explicit instantiation definition that names a class template
3357 // specialization explicitly instantiates the class template
3358 // specialization and is only an explicit instantiation definition
3359 // of members whose definition is visible at the point of
3360 // instantiation.
3361 if (TSK == TSK_ExplicitInstantiationDeclaration) {
3362 MSInfo->setTemplateSpecializationKind(TSK);
3363 MSInfo->setPointOfInstantiation(PointOfInstantiation);
3364 }
3365
3366 continue;
3367 }
3368
3369 InstantiateClass(PointOfInstantiation, Record, Pattern,
3370 TemplateArgs,
3371 TSK);
3372 } else {
3373 if (TSK == TSK_ExplicitInstantiationDefinition &&
3374 Record->getTemplateSpecializationKind() ==
3375 TSK_ExplicitInstantiationDeclaration) {
3376 Record->setTemplateSpecializationKind(TSK);
3377 MarkVTableUsed(PointOfInstantiation, Record, true);
3378 }
3379 }
3380
3381 Pattern = cast_or_null<CXXRecordDecl>(Record->getDefinition());
3382 if (Pattern)
3383 InstantiateClassMembers(PointOfInstantiation, Pattern, TemplateArgs,
3384 TSK);
3385 } else if (auto *Enum = dyn_cast<EnumDecl>(D)) {
3386 MemberSpecializationInfo *MSInfo = Enum->getMemberSpecializationInfo();
3387 assert(MSInfo && "No member specialization information?")((MSInfo && "No member specialization information?") ?
static_cast<void> (0) : __assert_fail ("MSInfo && \"No member specialization information?\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3387, __PRETTY_FUNCTION__))
;
3388
3389 if (MSInfo->getTemplateSpecializationKind()
3390 == TSK_ExplicitSpecialization)
3391 continue;
3392
3393 if (CheckSpecializationInstantiationRedecl(
3394 PointOfInstantiation, TSK, Enum,
3395 MSInfo->getTemplateSpecializationKind(),
3396 MSInfo->getPointOfInstantiation(), SuppressNew) ||
3397 SuppressNew)
3398 continue;
3399
3400 if (Enum->getDefinition())
3401 continue;
3402
3403 EnumDecl *Pattern = Enum->getTemplateInstantiationPattern();
3404 assert(Pattern && "Missing instantiated-from-template information")((Pattern && "Missing instantiated-from-template information"
) ? static_cast<void> (0) : __assert_fail ("Pattern && \"Missing instantiated-from-template information\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3404, __PRETTY_FUNCTION__))
;
3405
3406 if (TSK == TSK_ExplicitInstantiationDefinition) {
3407 if (!Pattern->getDefinition())
3408 continue;
3409
3410 InstantiateEnum(PointOfInstantiation, Enum, Pattern, TemplateArgs, TSK);
3411 } else {
3412 MSInfo->setTemplateSpecializationKind(TSK);
3413 MSInfo->setPointOfInstantiation(PointOfInstantiation);
3414 }
3415 } else if (auto *Field = dyn_cast<FieldDecl>(D)) {
3416 // No need to instantiate in-class initializers during explicit
3417 // instantiation.
3418 if (Field->hasInClassInitializer() && TSK == TSK_ImplicitInstantiation) {
3419 CXXRecordDecl *ClassPattern =
3420 Instantiation->getTemplateInstantiationPattern();
3421 DeclContext::lookup_result Lookup =
3422 ClassPattern->lookup(Field->getDeclName());
3423 FieldDecl *Pattern = Lookup.find_first<FieldDecl>();
3424 assert(Pattern)((Pattern) ? static_cast<void> (0) : __assert_fail ("Pattern"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3424, __PRETTY_FUNCTION__))
;
3425 InstantiateInClassInitializer(PointOfInstantiation, Field, Pattern,
3426 TemplateArgs);
3427 }
3428 }
3429 }
3430}
3431
3432/// Instantiate the definitions of all of the members of the
3433/// given class template specialization, which was named as part of an
3434/// explicit instantiation.
3435void
3436Sema::InstantiateClassTemplateSpecializationMembers(
3437 SourceLocation PointOfInstantiation,
3438 ClassTemplateSpecializationDecl *ClassTemplateSpec,
3439 TemplateSpecializationKind TSK) {
3440 // C++0x [temp.explicit]p7:
3441 // An explicit instantiation that names a class template
3442 // specialization is an explicit instantion of the same kind
3443 // (declaration or definition) of each of its members (not
3444 // including members inherited from base classes) that has not
3445 // been previously explicitly specialized in the translation unit
3446 // containing the explicit instantiation, except as described
3447 // below.
3448 InstantiateClassMembers(PointOfInstantiation, ClassTemplateSpec,
3449 getTemplateInstantiationArgs(ClassTemplateSpec),
3450 TSK);
3451}
3452
3453StmtResult
3454Sema::SubstStmt(Stmt *S, const MultiLevelTemplateArgumentList &TemplateArgs) {
3455 if (!S)
3456 return S;
3457
3458 TemplateInstantiator Instantiator(*this, TemplateArgs,
3459 SourceLocation(),
3460 DeclarationName());
3461 return Instantiator.TransformStmt(S);
3462}
3463
3464bool Sema::SubstTemplateArguments(
3465 ArrayRef<TemplateArgumentLoc> Args,
3466 const MultiLevelTemplateArgumentList &TemplateArgs,
3467 TemplateArgumentListInfo &Out) {
3468 TemplateInstantiator Instantiator(*this, TemplateArgs,
3469 SourceLocation(),
3470 DeclarationName());
3471 return Instantiator.TransformTemplateArguments(Args.begin(), Args.end(),
3472 Out);
3473}
3474
3475ExprResult
3476Sema::SubstExpr(Expr *E, const MultiLevelTemplateArgumentList &TemplateArgs) {
3477 if (!E)
3478 return E;
3479
3480 TemplateInstantiator Instantiator(*this, TemplateArgs,
3481 SourceLocation(),
3482 DeclarationName());
3483 return Instantiator.TransformExpr(E);
3484}
3485
3486ExprResult Sema::SubstInitializer(Expr *Init,
3487 const MultiLevelTemplateArgumentList &TemplateArgs,
3488 bool CXXDirectInit) {
3489 TemplateInstantiator Instantiator(*this, TemplateArgs,
3490 SourceLocation(),
3491 DeclarationName());
3492 return Instantiator.TransformInitializer(Init, CXXDirectInit);
3493}
3494
3495bool Sema::SubstExprs(ArrayRef<Expr *> Exprs, bool IsCall,
3496 const MultiLevelTemplateArgumentList &TemplateArgs,
3497 SmallVectorImpl<Expr *> &Outputs) {
3498 if (Exprs.empty())
3499 return false;
3500
3501 TemplateInstantiator Instantiator(*this, TemplateArgs,
3502 SourceLocation(),
3503 DeclarationName());
3504 return Instantiator.TransformExprs(Exprs.data(), Exprs.size(),
3505 IsCall, Outputs);
3506}
3507
3508NestedNameSpecifierLoc
3509Sema::SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS,
3510 const MultiLevelTemplateArgumentList &TemplateArgs) {
3511 if (!NNS)
3512 return NestedNameSpecifierLoc();
3513
3514 TemplateInstantiator Instantiator(*this, TemplateArgs, NNS.getBeginLoc(),
3515 DeclarationName());
3516 return Instantiator.TransformNestedNameSpecifierLoc(NNS);
3517}
3518
3519/// Do template substitution on declaration name info.
3520DeclarationNameInfo
3521Sema::SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo,
3522 const MultiLevelTemplateArgumentList &TemplateArgs) {
3523 TemplateInstantiator Instantiator(*this, TemplateArgs, NameInfo.getLoc(),
3524 NameInfo.getName());
3525 return Instantiator.TransformDeclarationNameInfo(NameInfo);
3526}
3527
3528TemplateName
3529Sema::SubstTemplateName(NestedNameSpecifierLoc QualifierLoc,
3530 TemplateName Name, SourceLocation Loc,
3531 const MultiLevelTemplateArgumentList &TemplateArgs) {
3532 TemplateInstantiator Instantiator(*this, TemplateArgs, Loc,
3533 DeclarationName());
3534 CXXScopeSpec SS;
3535 SS.Adopt(QualifierLoc);
3536 return Instantiator.TransformTemplateName(SS, Name, Loc);
3537}
3538
3539bool Sema::Subst(const TemplateArgumentLoc *Args, unsigned NumArgs,
3540 TemplateArgumentListInfo &Result,
3541 const MultiLevelTemplateArgumentList &TemplateArgs) {
3542 TemplateInstantiator Instantiator(*this, TemplateArgs, SourceLocation(),
3543 DeclarationName());
3544
3545 return Instantiator.TransformTemplateArguments(Args, NumArgs, Result);
3546}
3547
3548static const Decl *getCanonicalParmVarDecl(const Decl *D) {
3549 // When storing ParmVarDecls in the local instantiation scope, we always
3550 // want to use the ParmVarDecl from the canonical function declaration,
3551 // since the map is then valid for any redeclaration or definition of that
3552 // function.
3553 if (const ParmVarDecl *PV = dyn_cast<ParmVarDecl>(D)) {
3554 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(PV->getDeclContext())) {
3555 unsigned i = PV->getFunctionScopeIndex();
3556 // This parameter might be from a freestanding function type within the
3557 // function and isn't necessarily referring to one of FD's parameters.
3558 if (i < FD->getNumParams() && FD->getParamDecl(i) == PV)
3559 return FD->getCanonicalDecl()->getParamDecl(i);
3560 }
3561 }
3562 return D;
3563}
3564
3565
3566llvm::PointerUnion<Decl *, LocalInstantiationScope::DeclArgumentPack *> *
3567LocalInstantiationScope::findInstantiationOf(const Decl *D) {
3568 D = getCanonicalParmVarDecl(D);
3569 for (LocalInstantiationScope *Current = this; Current;
3570 Current = Current->Outer) {
3571
3572 // Check if we found something within this scope.
3573 const Decl *CheckD = D;
3574 do {
3575 LocalDeclsMap::iterator Found = Current->LocalDecls.find(CheckD);
3576 if (Found != Current->LocalDecls.end())
3577 return &Found->second;
3578
3579 // If this is a tag declaration, it's possible that we need to look for
3580 // a previous declaration.
3581 if (const TagDecl *Tag = dyn_cast<TagDecl>(CheckD))
3582 CheckD = Tag->getPreviousDecl();
3583 else
3584 CheckD = nullptr;
3585 } while (CheckD);
3586
3587 // If we aren't combined with our outer scope, we're done.
3588 if (!Current->CombineWithOuterScope)
3589 break;
3590 }
3591
3592 // If we're performing a partial substitution during template argument
3593 // deduction, we may not have values for template parameters yet.
3594 if (isa<NonTypeTemplateParmDecl>(D) || isa<TemplateTypeParmDecl>(D) ||
3595 isa<TemplateTemplateParmDecl>(D))
3596 return nullptr;
3597
3598 // Local types referenced prior to definition may require instantiation.
3599 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D))
3600 if (RD->isLocalClass())
3601 return nullptr;
3602
3603 // Enumeration types referenced prior to definition may appear as a result of
3604 // error recovery.
3605 if (isa<EnumDecl>(D))
3606 return nullptr;
3607
3608 // Materialized typedefs/type alias for implicit deduction guides may require
3609 // instantiation.
3610 if (isa<TypedefNameDecl>(D) &&
3611 isa<CXXDeductionGuideDecl>(D->getDeclContext()))
3612 return nullptr;
3613
3614 // If we didn't find the decl, then we either have a sema bug, or we have a
3615 // forward reference to a label declaration. Return null to indicate that
3616 // we have an uninstantiated label.
3617 assert(isa<LabelDecl>(D) && "declaration not instantiated in this scope")((isa<LabelDecl>(D) && "declaration not instantiated in this scope"
) ? static_cast<void> (0) : __assert_fail ("isa<LabelDecl>(D) && \"declaration not instantiated in this scope\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3617, __PRETTY_FUNCTION__))
;
3618 return nullptr;
3619}
3620
3621void LocalInstantiationScope::InstantiatedLocal(const Decl *D, Decl *Inst) {
3622 D = getCanonicalParmVarDecl(D);
3623 llvm::PointerUnion<Decl *, DeclArgumentPack *> &Stored = LocalDecls[D];
3624 if (Stored.isNull()) {
3625#ifndef NDEBUG
3626 // It should not be present in any surrounding scope either.
3627 LocalInstantiationScope *Current = this;
3628 while (Current->CombineWithOuterScope && Current->Outer) {
3629 Current = Current->Outer;
3630 assert(Current->LocalDecls.find(D) == Current->LocalDecls.end() &&((Current->LocalDecls.find(D) == Current->LocalDecls.end
() && "Instantiated local in inner and outer scopes")
? static_cast<void> (0) : __assert_fail ("Current->LocalDecls.find(D) == Current->LocalDecls.end() && \"Instantiated local in inner and outer scopes\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3631, __PRETTY_FUNCTION__))
3631 "Instantiated local in inner and outer scopes")((Current->LocalDecls.find(D) == Current->LocalDecls.end
() && "Instantiated local in inner and outer scopes")
? static_cast<void> (0) : __assert_fail ("Current->LocalDecls.find(D) == Current->LocalDecls.end() && \"Instantiated local in inner and outer scopes\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3631, __PRETTY_FUNCTION__))
;
3632 }
3633#endif
3634 Stored = Inst;
3635 } else if (DeclArgumentPack *Pack = Stored.dyn_cast<DeclArgumentPack *>()) {
3636 Pack->push_back(cast<VarDecl>(Inst));
3637 } else {
3638 assert(Stored.get<Decl *>() == Inst && "Already instantiated this local")((Stored.get<Decl *>() == Inst && "Already instantiated this local"
) ? static_cast<void> (0) : __assert_fail ("Stored.get<Decl *>() == Inst && \"Already instantiated this local\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3638, __PRETTY_FUNCTION__))
;
3639 }
3640}
3641
3642void LocalInstantiationScope::InstantiatedLocalPackArg(const Decl *D,
3643 VarDecl *Inst) {
3644 D = getCanonicalParmVarDecl(D);
3645 DeclArgumentPack *Pack = LocalDecls[D].get<DeclArgumentPack *>();
3646 Pack->push_back(Inst);
3647}
3648
3649void LocalInstantiationScope::MakeInstantiatedLocalArgPack(const Decl *D) {
3650#ifndef NDEBUG
3651 // This should be the first time we've been told about this decl.
3652 for (LocalInstantiationScope *Current = this;
3653 Current && Current->CombineWithOuterScope; Current = Current->Outer)
3654 assert(Current->LocalDecls.find(D) == Current->LocalDecls.end() &&((Current->LocalDecls.find(D) == Current->LocalDecls.end
() && "Creating local pack after instantiation of local"
) ? static_cast<void> (0) : __assert_fail ("Current->LocalDecls.find(D) == Current->LocalDecls.end() && \"Creating local pack after instantiation of local\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3655, __PRETTY_FUNCTION__))
3655 "Creating local pack after instantiation of local")((Current->LocalDecls.find(D) == Current->LocalDecls.end
() && "Creating local pack after instantiation of local"
) ? static_cast<void> (0) : __assert_fail ("Current->LocalDecls.find(D) == Current->LocalDecls.end() && \"Creating local pack after instantiation of local\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3655, __PRETTY_FUNCTION__))
;
3656#endif
3657
3658 D = getCanonicalParmVarDecl(D);
3659 llvm::PointerUnion<Decl *, DeclArgumentPack *> &Stored = LocalDecls[D];
3660 DeclArgumentPack *Pack = new DeclArgumentPack;
3661 Stored = Pack;
3662 ArgumentPacks.push_back(Pack);
3663}
3664
3665bool LocalInstantiationScope::isLocalPackExpansion(const Decl *D) {
3666 for (DeclArgumentPack *Pack : ArgumentPacks)
3667 if (std::find(Pack->begin(), Pack->end(), D) != Pack->end())
3668 return true;
3669 return false;
3670}
3671
3672void LocalInstantiationScope::SetPartiallySubstitutedPack(NamedDecl *Pack,
3673 const TemplateArgument *ExplicitArgs,
3674 unsigned NumExplicitArgs) {
3675 assert((!PartiallySubstitutedPack || PartiallySubstitutedPack == Pack) &&(((!PartiallySubstitutedPack || PartiallySubstitutedPack == Pack
) && "Already have a partially-substituted pack") ? static_cast
<void> (0) : __assert_fail ("(!PartiallySubstitutedPack || PartiallySubstitutedPack == Pack) && \"Already have a partially-substituted pack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3676, __PRETTY_FUNCTION__))
3676 "Already have a partially-substituted pack")(((!PartiallySubstitutedPack || PartiallySubstitutedPack == Pack
) && "Already have a partially-substituted pack") ? static_cast
<void> (0) : __assert_fail ("(!PartiallySubstitutedPack || PartiallySubstitutedPack == Pack) && \"Already have a partially-substituted pack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3676, __PRETTY_FUNCTION__))
;
3677 assert((!PartiallySubstitutedPack(((!PartiallySubstitutedPack || NumArgsInPartiallySubstitutedPack
== NumExplicitArgs) && "Wrong number of arguments in partially-substituted pack"
) ? static_cast<void> (0) : __assert_fail ("(!PartiallySubstitutedPack || NumArgsInPartiallySubstitutedPack == NumExplicitArgs) && \"Wrong number of arguments in partially-substituted pack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3679, __PRETTY_FUNCTION__))
3678 || NumArgsInPartiallySubstitutedPack == NumExplicitArgs) &&(((!PartiallySubstitutedPack || NumArgsInPartiallySubstitutedPack
== NumExplicitArgs) && "Wrong number of arguments in partially-substituted pack"
) ? static_cast<void> (0) : __assert_fail ("(!PartiallySubstitutedPack || NumArgsInPartiallySubstitutedPack == NumExplicitArgs) && \"Wrong number of arguments in partially-substituted pack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3679, __PRETTY_FUNCTION__))
3679 "Wrong number of arguments in partially-substituted pack")(((!PartiallySubstitutedPack || NumArgsInPartiallySubstitutedPack
== NumExplicitArgs) && "Wrong number of arguments in partially-substituted pack"
) ? static_cast<void> (0) : __assert_fail ("(!PartiallySubstitutedPack || NumArgsInPartiallySubstitutedPack == NumExplicitArgs) && \"Wrong number of arguments in partially-substituted pack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaTemplateInstantiate.cpp"
, 3679, __PRETTY_FUNCTION__))
;
3680 PartiallySubstitutedPack = Pack;
3681 ArgsInPartiallySubstitutedPack = ExplicitArgs;
3682 NumArgsInPartiallySubstitutedPack = NumExplicitArgs;
3683}
3684
3685NamedDecl *LocalInstantiationScope::getPartiallySubstitutedPack(
3686 const TemplateArgument **ExplicitArgs,
3687 unsigned *NumExplicitArgs) const {
3688 if (ExplicitArgs)
3689 *ExplicitArgs = nullptr;
3690 if (NumExplicitArgs)
3691 *NumExplicitArgs = 0;
3692
3693 for (const LocalInstantiationScope *Current = this; Current;
3694 Current = Current->Outer) {
3695 if (Current->PartiallySubstitutedPack) {
3696 if (ExplicitArgs)
3697 *ExplicitArgs = Current->ArgsInPartiallySubstitutedPack;
3698 if (NumExplicitArgs)
3699 *NumExplicitArgs = Current->NumArgsInPartiallySubstitutedPack;
3700
3701 return Current->PartiallySubstitutedPack;
3702 }
3703
3704 if (!Current->CombineWithOuterScope)
3705 break;
3706 }
3707
3708 return nullptr;
3709}

/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/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 &&((New.size() == 1 && "must override transformedLocalDecl if performing pack expansion"
) ? static_cast<void> (0) : __assert_fail ("New.size() == 1 && \"must override transformedLocalDecl if performing pack expansion\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/TreeTransform.h"
, 481, __PRETTY_FUNCTION__))
481 "must override transformedLocalDecl if performing pack expansion")((New.size() == 1 && "must override transformedLocalDecl if performing pack expansion"
) ? static_cast<void> (0) : __assert_fail ("New.size() == 1 && \"must override transformedLocalDecl if performing pack expansion\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/TreeTransform.h"
, 481, __PRETTY_FUNCTION__))
;
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")::llvm::llvm_unreachable_internal("Tag lookup cannot find non-tags"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/TreeTransform.h"
, 1131)
;
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 'allocator' clause.
1637 ///
1638 /// By default, performs semantic analysis to build the new OpenMP clause.
1639 /// Subclasses may override this routine to provide different behavior.
1640 OMPClause *RebuildOMPAllocatorClause(Expr *A, SourceLocation StartLoc,
1641 SourceLocation LParenLoc,
1642 SourceLocation EndLoc) {
1643 return getSema().ActOnOpenMPAllocatorClause(A, StartLoc, LParenLoc, EndLoc);
1644 }
1645
1646 /// Build a new OpenMP 'collapse' clause.
1647 ///
1648 /// By default, performs semantic analysis to build the new OpenMP clause.
1649 /// Subclasses may override this routine to provide different behavior.
1650 OMPClause *RebuildOMPCollapseClause(Expr *Num, SourceLocation StartLoc,
1651 SourceLocation LParenLoc,
1652 SourceLocation EndLoc) {
1653 return getSema().ActOnOpenMPCollapseClause(Num, StartLoc, LParenLoc,
1654 EndLoc);
1655 }
1656
1657 /// Build a new OpenMP 'default' clause.
1658 ///
1659 /// By default, performs semantic analysis to build the new OpenMP clause.
1660 /// Subclasses may override this routine to provide different behavior.
1661 OMPClause *RebuildOMPDefaultClause(DefaultKind Kind, SourceLocation KindKwLoc,
1662 SourceLocation StartLoc,
1663 SourceLocation LParenLoc,
1664 SourceLocation EndLoc) {
1665 return getSema().ActOnOpenMPDefaultClause(Kind, KindKwLoc,
1666 StartLoc, LParenLoc, EndLoc);
1667 }
1668
1669 /// Build a new OpenMP 'proc_bind' clause.
1670 ///
1671 /// By default, performs semantic analysis to build the new OpenMP clause.
1672 /// Subclasses may override this routine to provide different behavior.
1673 OMPClause *RebuildOMPProcBindClause(ProcBindKind Kind,
1674 SourceLocation KindKwLoc,
1675 SourceLocation StartLoc,
1676 SourceLocation LParenLoc,
1677 SourceLocation EndLoc) {
1678 return getSema().ActOnOpenMPProcBindClause(Kind, KindKwLoc,
1679 StartLoc, LParenLoc, EndLoc);
1680 }
1681
1682 /// Build a new OpenMP 'schedule' clause.
1683 ///
1684 /// By default, performs semantic analysis to build the new OpenMP clause.
1685 /// Subclasses may override this routine to provide different behavior.
1686 OMPClause *RebuildOMPScheduleClause(
1687 OpenMPScheduleClauseModifier M1, OpenMPScheduleClauseModifier M2,
1688 OpenMPScheduleClauseKind Kind, Expr *ChunkSize, SourceLocation StartLoc,
1689 SourceLocation LParenLoc, SourceLocation M1Loc, SourceLocation M2Loc,
1690 SourceLocation KindLoc, SourceLocation CommaLoc, SourceLocation EndLoc) {
1691 return getSema().ActOnOpenMPScheduleClause(
1692 M1, M2, Kind, ChunkSize, StartLoc, LParenLoc, M1Loc, M2Loc, KindLoc,
1693 CommaLoc, EndLoc);
1694 }
1695
1696 /// Build a new OpenMP 'ordered' 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 *RebuildOMPOrderedClause(SourceLocation StartLoc,
1701 SourceLocation EndLoc,
1702 SourceLocation LParenLoc, Expr *Num) {
1703 return getSema().ActOnOpenMPOrderedClause(StartLoc, EndLoc, LParenLoc, Num);
1704 }
1705
1706 /// Build a new OpenMP 'private' clause.
1707 ///
1708 /// By default, performs semantic analysis to build the new OpenMP clause.
1709 /// Subclasses may override this routine to provide different behavior.
1710 OMPClause *RebuildOMPPrivateClause(ArrayRef<Expr *> VarList,
1711 SourceLocation StartLoc,
1712 SourceLocation LParenLoc,
1713 SourceLocation EndLoc) {
1714 return getSema().ActOnOpenMPPrivateClause(VarList, StartLoc, LParenLoc,
1715 EndLoc);
1716 }
1717
1718 /// Build a new OpenMP 'firstprivate' clause.
1719 ///
1720 /// By default, performs semantic analysis to build the new OpenMP clause.
1721 /// Subclasses may override this routine to provide different behavior.
1722 OMPClause *RebuildOMPFirstprivateClause(ArrayRef<Expr *> VarList,
1723 SourceLocation StartLoc,
1724 SourceLocation LParenLoc,
1725 SourceLocation EndLoc) {
1726 return getSema().ActOnOpenMPFirstprivateClause(VarList, StartLoc, LParenLoc,
1727 EndLoc);
1728 }
1729
1730 /// Build a new OpenMP 'lastprivate' clause.
1731 ///
1732 /// By default, performs semantic analysis to build the new OpenMP clause.
1733 /// Subclasses may override this routine to provide different behavior.
1734 OMPClause *RebuildOMPLastprivateClause(ArrayRef<Expr *> VarList,
1735 OpenMPLastprivateModifier LPKind,
1736 SourceLocation LPKindLoc,
1737 SourceLocation ColonLoc,
1738 SourceLocation StartLoc,
1739 SourceLocation LParenLoc,
1740 SourceLocation EndLoc) {
1741 return getSema().ActOnOpenMPLastprivateClause(
1742 VarList, LPKind, LPKindLoc, ColonLoc, StartLoc, LParenLoc, EndLoc);
1743 }
1744
1745 /// Build a new OpenMP 'shared' clause.
1746 ///
1747 /// By default, performs semantic analysis to build the new OpenMP clause.
1748 /// Subclasses may override this routine to provide different behavior.
1749 OMPClause *RebuildOMPSharedClause(ArrayRef<Expr *> VarList,
1750 SourceLocation StartLoc,
1751 SourceLocation LParenLoc,
1752 SourceLocation EndLoc) {
1753 return getSema().ActOnOpenMPSharedClause(VarList, StartLoc, LParenLoc,
1754 EndLoc);
1755 }
1756
1757 /// Build a new OpenMP 'reduction' clause.
1758 ///
1759 /// By default, performs semantic analysis to build the new statement.
1760 /// Subclasses may override this routine to provide different behavior.
1761 OMPClause *RebuildOMPReductionClause(
1762 ArrayRef<Expr *> VarList, OpenMPReductionClauseModifier Modifier,
1763 SourceLocation StartLoc, SourceLocation LParenLoc,
1764 SourceLocation ModifierLoc, SourceLocation ColonLoc,
1765 SourceLocation EndLoc, CXXScopeSpec &ReductionIdScopeSpec,
1766 const DeclarationNameInfo &ReductionId,
1767 ArrayRef<Expr *> UnresolvedReductions) {
1768 return getSema().ActOnOpenMPReductionClause(
1769 VarList, Modifier, StartLoc, LParenLoc, ModifierLoc, ColonLoc, EndLoc,
1770 ReductionIdScopeSpec, ReductionId, UnresolvedReductions);
1771 }
1772
1773 /// Build a new OpenMP 'task_reduction' clause.
1774 ///
1775 /// By default, performs semantic analysis to build the new statement.
1776 /// Subclasses may override this routine to provide different behavior.
1777 OMPClause *RebuildOMPTaskReductionClause(
1778 ArrayRef<Expr *> VarList, SourceLocation StartLoc,
1779 SourceLocation LParenLoc, SourceLocation ColonLoc, SourceLocation EndLoc,
1780 CXXScopeSpec &ReductionIdScopeSpec,
1781 const DeclarationNameInfo &ReductionId,
1782 ArrayRef<Expr *> UnresolvedReductions) {
1783 return getSema().ActOnOpenMPTaskReductionClause(
1784 VarList, StartLoc, LParenLoc, ColonLoc, EndLoc, ReductionIdScopeSpec,
1785 ReductionId, UnresolvedReductions);
1786 }
1787
1788 /// Build a new OpenMP 'in_reduction' clause.
1789 ///
1790 /// By default, performs semantic analysis to build the new statement.
1791 /// Subclasses may override this routine to provide different behavior.
1792 OMPClause *
1793 RebuildOMPInReductionClause(ArrayRef<Expr *> VarList, SourceLocation StartLoc,
1794 SourceLocation LParenLoc, SourceLocation ColonLoc,
1795 SourceLocation EndLoc,
1796 CXXScopeSpec &ReductionIdScopeSpec,
1797 const DeclarationNameInfo &ReductionId,
1798 ArrayRef<Expr *> UnresolvedReductions) {
1799 return getSema().ActOnOpenMPInReductionClause(
1800 VarList, StartLoc, LParenLoc, ColonLoc, EndLoc, ReductionIdScopeSpec,
1801 ReductionId, UnresolvedReductions);
1802 }
1803
1804 /// Build a new OpenMP 'linear' clause.
1805 ///
1806 /// By default, performs semantic analysis to build the new OpenMP clause.
1807 /// Subclasses may override this routine to provide different behavior.
1808 OMPClause *RebuildOMPLinearClause(ArrayRef<Expr *> VarList, Expr *Step,
1809 SourceLocation StartLoc,
1810 SourceLocation LParenLoc,
1811 OpenMPLinearClauseKind Modifier,
1812 SourceLocation ModifierLoc,
1813 SourceLocation ColonLoc,
1814 SourceLocation EndLoc) {
1815 return getSema().ActOnOpenMPLinearClause(VarList, Step, StartLoc, LParenLoc,
1816 Modifier, ModifierLoc, ColonLoc,
1817 EndLoc);
1818 }
1819
1820 /// Build a new OpenMP 'aligned' clause.
1821 ///
1822 /// By default, performs semantic analysis to build the new OpenMP clause.
1823 /// Subclasses may override this routine to provide different behavior.
1824 OMPClause *RebuildOMPAlignedClause(ArrayRef<Expr *> VarList, Expr *Alignment,
1825 SourceLocation StartLoc,
1826 SourceLocation LParenLoc,
1827 SourceLocation ColonLoc,
1828 SourceLocation EndLoc) {
1829 return getSema().ActOnOpenMPAlignedClause(VarList, Alignment, StartLoc,
1830 LParenLoc, ColonLoc, EndLoc);
1831 }
1832
1833 /// Build a new OpenMP 'copyin' clause.
1834 ///
1835 /// By default, performs semantic analysis to build the new OpenMP clause.
1836 /// Subclasses may override this routine to provide different behavior.
1837 OMPClause *RebuildOMPCopyinClause(ArrayRef<Expr *> VarList,
1838 SourceLocation StartLoc,
1839 SourceLocation LParenLoc,
1840 SourceLocation EndLoc) {
1841 return getSema().ActOnOpenMPCopyinClause(VarList, StartLoc, LParenLoc,
1842 EndLoc);
1843 }
1844
1845 /// Build a new OpenMP 'copyprivate' clause.
1846 ///
1847 /// By default, performs semantic analysis to build the new OpenMP clause.
1848 /// Subclasses may override this routine to provide different behavior.
1849 OMPClause *RebuildOMPCopyprivateClause(ArrayRef<Expr *> VarList,
1850 SourceLocation StartLoc,
1851 SourceLocation LParenLoc,
1852 SourceLocation EndLoc) {
1853 return getSema().ActOnOpenMPCopyprivateClause(VarList, StartLoc, LParenLoc,
1854 EndLoc);
1855 }
1856
1857 /// Build a new OpenMP 'flush' pseudo clause.
1858 ///
1859 /// By default, performs semantic analysis to build the new OpenMP clause.
1860 /// Subclasses may override this routine to provide different behavior.
1861 OMPClause *RebuildOMPFlushClause(ArrayRef<Expr *> VarList,
1862 SourceLocation StartLoc,
1863 SourceLocation LParenLoc,
1864 SourceLocation EndLoc) {
1865 return getSema().ActOnOpenMPFlushClause(VarList, StartLoc, LParenLoc,
1866 EndLoc);
1867 }
1868
1869 /// Build a new OpenMP 'depobj' pseudo clause.
1870 ///
1871 /// By default, performs semantic analysis to build the new OpenMP clause.
1872 /// Subclasses may override this routine to provide different behavior.
1873 OMPClause *RebuildOMPDepobjClause(Expr *Depobj, SourceLocation StartLoc,
1874 SourceLocation LParenLoc,
1875 SourceLocation EndLoc) {
1876 return getSema().ActOnOpenMPDepobjClause(Depobj, StartLoc, LParenLoc,
1877 EndLoc);
1878 }
1879
1880 /// Build a new OpenMP 'depend' pseudo clause.
1881 ///
1882 /// By default, performs semantic analysis to build the new OpenMP clause.
1883 /// Subclasses may override this routine to provide different behavior.
1884 OMPClause *
1885 RebuildOMPDependClause(Expr *DepModifier, OpenMPDependClauseKind DepKind,
1886 SourceLocation DepLoc, SourceLocation ColonLoc,
1887 ArrayRef<Expr *> VarList, SourceLocation StartLoc,
1888 SourceLocation LParenLoc, SourceLocation EndLoc) {
1889 return getSema().ActOnOpenMPDependClause(DepModifier, DepKind, DepLoc,
1890 ColonLoc, VarList, StartLoc,
1891 LParenLoc, EndLoc);
1892 }
1893
1894 /// Build a new OpenMP 'device' clause.
1895 ///
1896 /// By default, performs semantic analysis to build the new statement.
1897 /// Subclasses may override this routine to provide different behavior.
1898 OMPClause *RebuildOMPDeviceClause(OpenMPDeviceClauseModifier Modifier,
1899 Expr *Device, SourceLocation StartLoc,
1900 SourceLocation LParenLoc,
1901 SourceLocation ModifierLoc,
1902 SourceLocation EndLoc) {
1903 return getSema().ActOnOpenMPDeviceClause(Modifier, Device, StartLoc,
1904 LParenLoc, ModifierLoc, EndLoc);
1905 }
1906
1907 /// Build a new OpenMP 'map' clause.
1908 ///
1909 /// By default, performs semantic analysis to build the new OpenMP clause.
1910 /// Subclasses may override this routine to provide different behavior.
1911 OMPClause *RebuildOMPMapClause(
1912 ArrayRef<OpenMPMapModifierKind> MapTypeModifiers,
1913 ArrayRef<SourceLocation> MapTypeModifiersLoc,
1914 CXXScopeSpec MapperIdScopeSpec, DeclarationNameInfo MapperId,
1915 OpenMPMapClauseKind MapType, bool IsMapTypeImplicit,
1916 SourceLocation MapLoc, SourceLocation ColonLoc, ArrayRef<Expr *> VarList,
1917 const OMPVarListLocTy &Locs, ArrayRef<Expr *> UnresolvedMappers) {
1918 return getSema().ActOnOpenMPMapClause(MapTypeModifiers, MapTypeModifiersLoc,
1919 MapperIdScopeSpec, MapperId, MapType,
1920 IsMapTypeImplicit, MapLoc, ColonLoc,
1921 VarList, Locs, UnresolvedMappers);
1922 }
1923
1924 /// Build a new OpenMP 'allocate' clause.
1925 ///
1926 /// By default, performs semantic analysis to build the new OpenMP clause.
1927 /// Subclasses may override this routine to provide different behavior.
1928 OMPClause *RebuildOMPAllocateClause(Expr *Allocate, ArrayRef<Expr *> VarList,
1929 SourceLocation StartLoc,
1930 SourceLocation LParenLoc,
1931 SourceLocation ColonLoc,
1932 SourceLocation EndLoc) {
1933 return getSema().ActOnOpenMPAllocateClause(Allocate, VarList, StartLoc,
1934 LParenLoc, ColonLoc, EndLoc);
1935 }
1936
1937 /// Build a new OpenMP 'num_teams' clause.
1938 ///
1939 /// By default, performs semantic analysis to build the new statement.
1940 /// Subclasses may override this routine to provide different behavior.
1941 OMPClause *RebuildOMPNumTeamsClause(Expr *NumTeams, SourceLocation StartLoc,
1942 SourceLocation LParenLoc,
1943 SourceLocation EndLoc) {
1944 return getSema().ActOnOpenMPNumTeamsClause(NumTeams, StartLoc, LParenLoc,
1945 EndLoc);
1946 }
1947
1948 /// Build a new OpenMP 'thread_limit' clause.
1949 ///
1950 /// By default, performs semantic analysis to build the new statement.
1951 /// Subclasses may override this routine to provide different behavior.
1952 OMPClause *RebuildOMPThreadLimitClause(Expr *ThreadLimit,
1953 SourceLocation StartLoc,
1954 SourceLocation LParenLoc,
1955 SourceLocation EndLoc) {
1956 return getSema().ActOnOpenMPThreadLimitClause(ThreadLimit, StartLoc,
1957 LParenLoc, EndLoc);
1958 }
1959
1960 /// Build a new OpenMP 'priority' clause.
1961 ///
1962 /// By default, performs semantic analysis to build the new statement.
1963 /// Subclasses may override this routine to provide different behavior.
1964 OMPClause *RebuildOMPPriorityClause(Expr *Priority, SourceLocation StartLoc,
1965 SourceLocation LParenLoc,
1966 SourceLocation EndLoc) {
1967 return getSema().ActOnOpenMPPriorityClause(Priority, StartLoc, LParenLoc,
1968 EndLoc);
1969 }
1970
1971 /// Build a new OpenMP 'grainsize' clause.
1972 ///
1973 /// By default, performs semantic analysis to build the new statement.
1974 /// Subclasses may override this routine to provide different behavior.
1975 OMPClause *RebuildOMPGrainsizeClause(Expr *Grainsize, SourceLocation StartLoc,
1976 SourceLocation LParenLoc,
1977 SourceLocation EndLoc) {
1978 return getSema().ActOnOpenMPGrainsizeClause(Grainsize, StartLoc, LParenLoc,
1979 EndLoc);
1980 }
1981
1982 /// Build a new OpenMP 'num_tasks' clause.
1983 ///
1984 /// By default, performs semantic analysis to build the new statement.
1985 /// Subclasses may override this routine to provide different behavior.
1986 OMPClause *RebuildOMPNumTasksClause(Expr *NumTasks, SourceLocation StartLoc,
1987 SourceLocation LParenLoc,
1988 SourceLocation EndLoc) {
1989 return getSema().ActOnOpenMPNumTasksClause(NumTasks, StartLoc, LParenLoc,
1990 EndLoc);
1991 }
1992
1993 /// Build a new OpenMP 'hint' clause.
1994 ///
1995 /// By default, performs semantic analysis to build the new statement.
1996 /// Subclasses may override this routine to provide different behavior.
1997 OMPClause *RebuildOMPHintClause(Expr *Hint, SourceLocation StartLoc,
1998 SourceLocation LParenLoc,
1999 SourceLocation EndLoc) {
2000 return getSema().ActOnOpenMPHintClause(Hint, StartLoc, LParenLoc, EndLoc);
2001 }
2002
2003 /// Build a new OpenMP 'detach' clause.
2004 ///
2005 /// By default, performs semantic analysis to build the new statement.
2006 /// Subclasses may override this routine to provide different behavior.
2007 OMPClause *RebuildOMPDetachClause(Expr *Evt, SourceLocation StartLoc,
2008 SourceLocation LParenLoc,
2009 SourceLocation EndLoc) {
2010 return getSema().ActOnOpenMPDetachClause(Evt, StartLoc, LParenLoc, EndLoc);
2011 }
2012
2013 /// Build a new OpenMP 'dist_schedule' clause.
2014 ///
2015 /// By default, performs semantic analysis to build the new OpenMP clause.
2016 /// Subclasses may override this routine to provide different behavior.
2017 OMPClause *
2018 RebuildOMPDistScheduleClause(OpenMPDistScheduleClauseKind Kind,
2019 Expr *ChunkSize, SourceLocation StartLoc,
2020 SourceLocation LParenLoc, SourceLocation KindLoc,
2021 SourceLocation CommaLoc, SourceLocation EndLoc) {
2022 return getSema().ActOnOpenMPDistScheduleClause(
2023 Kind, ChunkSize, StartLoc, LParenLoc, KindLoc, CommaLoc, EndLoc);
2024 }
2025
2026 /// Build a new OpenMP 'to' clause.
2027 ///
2028 /// By default, performs semantic analysis to build the new statement.
2029 /// Subclasses may override this routine to provide different behavior.
2030 OMPClause *
2031 RebuildOMPToClause(ArrayRef<OpenMPMotionModifierKind> MotionModifiers,
2032 ArrayRef<SourceLocation> MotionModifiersLoc,
2033 CXXScopeSpec &MapperIdScopeSpec,
2034 DeclarationNameInfo &MapperId, SourceLocation ColonLoc,
2035 ArrayRef<Expr *> VarList, const OMPVarListLocTy &Locs,
2036 ArrayRef<Expr *> UnresolvedMappers) {
2037 return getSema().ActOnOpenMPToClause(MotionModifiers, MotionModifiersLoc,
2038 MapperIdScopeSpec, MapperId, ColonLoc,
2039 VarList, Locs, UnresolvedMappers);
2040 }
2041
2042 /// Build a new OpenMP 'from' clause.
2043 ///
2044 /// By default, performs semantic analysis to build the new statement.
2045 /// Subclasses may override this routine to provide different behavior.
2046 OMPClause *
2047 RebuildOMPFromClause(ArrayRef<OpenMPMotionModifierKind> MotionModifiers,
2048 ArrayRef<SourceLocation> MotionModifiersLoc,
2049 CXXScopeSpec &MapperIdScopeSpec,
2050 DeclarationNameInfo &MapperId, SourceLocation ColonLoc,
2051 ArrayRef<Expr *> VarList, const OMPVarListLocTy &Locs,
2052 ArrayRef<Expr *> UnresolvedMappers) {
2053 return getSema().ActOnOpenMPFromClause(
2054 MotionModifiers, MotionModifiersLoc, MapperIdScopeSpec, MapperId,
2055 ColonLoc, VarList, Locs, UnresolvedMappers);
2056 }
2057
2058 /// Build a new OpenMP 'use_device_ptr' clause.
2059 ///
2060 /// By default, performs semantic analysis to build the new OpenMP clause.
2061 /// Subclasses may override this routine to provide different behavior.
2062 OMPClause *RebuildOMPUseDevicePtrClause(ArrayRef<Expr *> VarList,
2063 const OMPVarListLocTy &Locs) {
2064 return getSema().ActOnOpenMPUseDevicePtrClause(VarList, Locs);
2065 }
2066
2067 /// Build a new OpenMP 'use_device_addr' clause.
2068 ///
2069 /// By default, performs semantic analysis to build the new OpenMP clause.
2070 /// Subclasses may override this routine to provide different behavior.
2071 OMPClause *RebuildOMPUseDeviceAddrClause(ArrayRef<Expr *> VarList,
2072 const OMPVarListLocTy &Locs) {
2073 return getSema().ActOnOpenMPUseDeviceAddrClause(VarList, Locs);
2074 }
2075
2076 /// Build a new OpenMP 'is_device_ptr' clause.
2077 ///
2078 /// By default, performs semantic analysis to build the new OpenMP clause.
2079 /// Subclasses may override this routine to provide different behavior.
2080 OMPClause *RebuildOMPIsDevicePtrClause(ArrayRef<Expr *> VarList,
2081 const OMPVarListLocTy &Locs) {
2082 return getSema().ActOnOpenMPIsDevicePtrClause(VarList, Locs);
2083 }
2084
2085 /// Build a new OpenMP 'defaultmap' clause.
2086 ///
2087 /// By default, performs semantic analysis to build the new OpenMP clause.
2088 /// Subclasses may override this routine to provide different behavior.
2089 OMPClause *RebuildOMPDefaultmapClause(OpenMPDefaultmapClauseModifier M,
2090 OpenMPDefaultmapClauseKind Kind,
2091 SourceLocation StartLoc,
2092 SourceLocation LParenLoc,
2093 SourceLocation MLoc,
2094 SourceLocation KindLoc,
2095 SourceLocation EndLoc) {
2096 return getSema().ActOnOpenMPDefaultmapClause(M, Kind, StartLoc, LParenLoc,
2097 MLoc, KindLoc, EndLoc);
2098 }
2099
2100 /// Build a new OpenMP 'nontemporal' clause.
2101 ///
2102 /// By default, performs semantic analysis to build the new OpenMP clause.
2103 /// Subclasses may override this routine to provide different behavior.
2104 OMPClause *RebuildOMPNontemporalClause(ArrayRef<Expr *> VarList,
2105 SourceLocation StartLoc,
2106 SourceLocation LParenLoc,
2107 SourceLocation EndLoc) {
2108 return getSema().ActOnOpenMPNontemporalClause(VarList, StartLoc, LParenLoc,
2109 EndLoc);
2110 }
2111
2112 /// Build a new OpenMP 'inclusive' clause.
2113 ///
2114 /// By default, performs semantic analysis to build the new OpenMP clause.
2115 /// Subclasses may override this routine to provide different behavior.
2116 OMPClause *RebuildOMPInclusiveClause(ArrayRef<Expr *> VarList,
2117 SourceLocation StartLoc,
2118 SourceLocation LParenLoc,
2119 SourceLocation EndLoc) {
2120 return getSema().ActOnOpenMPInclusiveClause(VarList, StartLoc, LParenLoc,
2121 EndLoc);
2122 }
2123
2124 /// Build a new OpenMP 'exclusive' clause.
2125 ///
2126 /// By default, performs semantic analysis to build the new OpenMP clause.
2127 /// Subclasses may override this routine to provide different behavior.
2128 OMPClause *RebuildOMPExclusiveClause(ArrayRef<Expr *> VarList,
2129 SourceLocation StartLoc,
2130 SourceLocation LParenLoc,
2131 SourceLocation EndLoc) {
2132 return getSema().ActOnOpenMPExclusiveClause(VarList, StartLoc, LParenLoc,
2133 EndLoc);
2134 }
2135
2136 /// Build a new OpenMP 'uses_allocators' clause.
2137 ///
2138 /// By default, performs semantic analysis to build the new OpenMP clause.
2139 /// Subclasses may override this routine to provide different behavior.
2140 OMPClause *RebuildOMPUsesAllocatorsClause(
2141 ArrayRef<Sema::UsesAllocatorsData> Data, SourceLocation StartLoc,
2142 SourceLocation LParenLoc, SourceLocation EndLoc) {
2143 return getSema().ActOnOpenMPUsesAllocatorClause(StartLoc, LParenLoc, EndLoc,
2144 Data);
2145 }
2146
2147 /// Build a new OpenMP 'affinity' clause.
2148 ///
2149 /// By default, performs semantic analysis to build the new OpenMP clause.
2150 /// Subclasses may override this routine to provide different behavior.
2151 OMPClause *RebuildOMPAffinityClause(SourceLocation StartLoc,
2152 SourceLocation LParenLoc,
2153 SourceLocation ColonLoc,
2154 SourceLocation EndLoc, Expr *Modifier,
2155 ArrayRef<Expr *> Locators) {
2156 return getSema().ActOnOpenMPAffinityClause(StartLoc, LParenLoc, ColonLoc,
2157 EndLoc, Modifier, Locators);
2158 }
2159
2160 /// Build a new OpenMP 'order' clause.
2161 ///
2162 /// By default, performs semantic analysis to build the new OpenMP clause.
2163 /// Subclasses may override this routine to provide different behavior.
2164 OMPClause *RebuildOMPOrderClause(OpenMPOrderClauseKind Kind,
2165 SourceLocation KindKwLoc,
2166 SourceLocat