Bug Summary

File:tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
Warning:line 4415, column 7
Called C++ object pointer is null

Annotated Source Code

/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp

→
1//===--- SemaTemplateInstantiateDecl.cpp - C++ Template Decl Instantiation ===/
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//===----------------------------------------------------------------------===/
8//
9// This file implements C++ template instantiation for declarations.
10//
11//===----------------------------------------------------------------------===/
12#include "clang/Sema/SemaInternal.h"
13#include "clang/AST/ASTConsumer.h"
14#include "clang/AST/ASTContext.h"
15#include "clang/AST/ASTMutationListener.h"
16#include "clang/AST/DeclTemplate.h"
17#include "clang/AST/DeclVisitor.h"
18#include "clang/AST/DependentDiagnostic.h"
19#include "clang/AST/Expr.h"
20#include "clang/AST/ExprCXX.h"
21#include "clang/AST/TypeLoc.h"
22#include "clang/Sema/Initialization.h"
23#include "clang/Sema/Lookup.h"
24#include "clang/Sema/PrettyDeclStackTrace.h"
25#include "clang/Sema/Template.h"
26
27using namespace clang;
28
29static bool isDeclWithinFunction(const Decl *D) {
30 const DeclContext *DC = D->getDeclContext();
31 if (DC->isFunctionOrMethod())
32 return true;
33
34 if (DC->isRecord())
35 return cast<CXXRecordDecl>(DC)->isLocalClass();
36
37 return false;
38}
39
40template<typename DeclT>
41static bool SubstQualifier(Sema &SemaRef, const DeclT *OldDecl, DeclT *NewDecl,
42 const MultiLevelTemplateArgumentList &TemplateArgs) {
43 if (!OldDecl->getQualifierLoc())
44 return false;
45
46 assert((NewDecl->getFriendObjectKind() ||(static_cast <bool> ((NewDecl->getFriendObjectKind()
|| !OldDecl->getLexicalDeclContext()->isDependentContext
()) && "non-friend with qualified name defined in dependent context"
) ? void (0) : __assert_fail ("(NewDecl->getFriendObjectKind() || !OldDecl->getLexicalDeclContext()->isDependentContext()) && \"non-friend with qualified name defined in dependent context\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 48, __extension__ __PRETTY_FUNCTION__))
47 !OldDecl->getLexicalDeclContext()->isDependentContext()) &&(static_cast <bool> ((NewDecl->getFriendObjectKind()
|| !OldDecl->getLexicalDeclContext()->isDependentContext
()) && "non-friend with qualified name defined in dependent context"
) ? void (0) : __assert_fail ("(NewDecl->getFriendObjectKind() || !OldDecl->getLexicalDeclContext()->isDependentContext()) && \"non-friend with qualified name defined in dependent context\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 48, __extension__ __PRETTY_FUNCTION__))
48 "non-friend with qualified name defined in dependent context")(static_cast <bool> ((NewDecl->getFriendObjectKind()
|| !OldDecl->getLexicalDeclContext()->isDependentContext
()) && "non-friend with qualified name defined in dependent context"
) ? void (0) : __assert_fail ("(NewDecl->getFriendObjectKind() || !OldDecl->getLexicalDeclContext()->isDependentContext()) && \"non-friend with qualified name defined in dependent context\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 48, __extension__ __PRETTY_FUNCTION__));
49 Sema::ContextRAII SavedContext(
50 SemaRef,
51 const_cast<DeclContext *>(NewDecl->getFriendObjectKind()
52 ? NewDecl->getLexicalDeclContext()
53 : OldDecl->getLexicalDeclContext()));
54
55 NestedNameSpecifierLoc NewQualifierLoc
56 = SemaRef.SubstNestedNameSpecifierLoc(OldDecl->getQualifierLoc(),
57 TemplateArgs);
58
59 if (!NewQualifierLoc)
60 return true;
61
62 NewDecl->setQualifierInfo(NewQualifierLoc);
63 return false;
64}
65
66bool TemplateDeclInstantiator::SubstQualifier(const DeclaratorDecl *OldDecl,
67 DeclaratorDecl *NewDecl) {
68 return ::SubstQualifier(SemaRef, OldDecl, NewDecl, TemplateArgs);
69}
70
71bool TemplateDeclInstantiator::SubstQualifier(const TagDecl *OldDecl,
72 TagDecl *NewDecl) {
73 return ::SubstQualifier(SemaRef, OldDecl, NewDecl, TemplateArgs);
74}
75
76// Include attribute instantiation code.
77#include "clang/Sema/AttrTemplateInstantiate.inc"
78
79static void instantiateDependentAlignedAttr(
80 Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs,
81 const AlignedAttr *Aligned, Decl *New, bool IsPackExpansion) {
82 if (Aligned->isAlignmentExpr()) {
83 // The alignment expression is a constant expression.
84 EnterExpressionEvaluationContext Unevaluated(
85 S, Sema::ExpressionEvaluationContext::ConstantEvaluated);
86 ExprResult Result = S.SubstExpr(Aligned->getAlignmentExpr(), TemplateArgs);
87 if (!Result.isInvalid())
88 S.AddAlignedAttr(Aligned->getLocation(), New, Result.getAs<Expr>(),
89 Aligned->getSpellingListIndex(), IsPackExpansion);
90 } else {
91 TypeSourceInfo *Result = S.SubstType(Aligned->getAlignmentType(),
92 TemplateArgs, Aligned->getLocation(),
93 DeclarationName());
94 if (Result)
95 S.AddAlignedAttr(Aligned->getLocation(), New, Result,
96 Aligned->getSpellingListIndex(), IsPackExpansion);
97 }
98}
99
100static void instantiateDependentAlignedAttr(
101 Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs,
102 const AlignedAttr *Aligned, Decl *New) {
103 if (!Aligned->isPackExpansion()) {
104 instantiateDependentAlignedAttr(S, TemplateArgs, Aligned, New, false);
105 return;
106 }
107
108 SmallVector<UnexpandedParameterPack, 2> Unexpanded;
109 if (Aligned->isAlignmentExpr())
110 S.collectUnexpandedParameterPacks(Aligned->getAlignmentExpr(),
111 Unexpanded);
112 else
113 S.collectUnexpandedParameterPacks(Aligned->getAlignmentType()->getTypeLoc(),
114 Unexpanded);
115 assert(!Unexpanded.empty() && "Pack expansion without parameter packs?")(static_cast <bool> (!Unexpanded.empty() && "Pack expansion without parameter packs?"
) ? void (0) : __assert_fail ("!Unexpanded.empty() && \"Pack expansion without parameter packs?\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 115, __extension__ __PRETTY_FUNCTION__));
116
117 // Determine whether we can expand this attribute pack yet.
118 bool Expand = true, RetainExpansion = false;
119 Optional<unsigned> NumExpansions;
120 // FIXME: Use the actual location of the ellipsis.
121 SourceLocation EllipsisLoc = Aligned->getLocation();
122 if (S.CheckParameterPacksForExpansion(EllipsisLoc, Aligned->getRange(),
123 Unexpanded, TemplateArgs, Expand,
124 RetainExpansion, NumExpansions))
125 return;
126
127 if (!Expand) {
128 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(S, -1);
129 instantiateDependentAlignedAttr(S, TemplateArgs, Aligned, New, true);
130 } else {
131 for (unsigned I = 0; I != *NumExpansions; ++I) {
132 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(S, I);
133 instantiateDependentAlignedAttr(S, TemplateArgs, Aligned, New, false);
134 }
135 }
136}
137
138static void instantiateDependentAssumeAlignedAttr(
139 Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs,
140 const AssumeAlignedAttr *Aligned, Decl *New) {
141 // The alignment expression is a constant expression.
142 EnterExpressionEvaluationContext Unevaluated(
143 S, Sema::ExpressionEvaluationContext::ConstantEvaluated);
144
145 Expr *E, *OE = nullptr;
146 ExprResult Result = S.SubstExpr(Aligned->getAlignment(), TemplateArgs);
147 if (Result.isInvalid())
148 return;
149 E = Result.getAs<Expr>();
150
151 if (Aligned->getOffset()) {
152 Result = S.SubstExpr(Aligned->getOffset(), TemplateArgs);
153 if (Result.isInvalid())
154 return;
155 OE = Result.getAs<Expr>();
156 }
157
158 S.AddAssumeAlignedAttr(Aligned->getLocation(), New, E, OE,
159 Aligned->getSpellingListIndex());
160}
161
162static void instantiateDependentAlignValueAttr(
163 Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs,
164 const AlignValueAttr *Aligned, Decl *New) {
165 // The alignment expression is a constant expression.
166 EnterExpressionEvaluationContext Unevaluated(
167 S, Sema::ExpressionEvaluationContext::ConstantEvaluated);
168 ExprResult Result = S.SubstExpr(Aligned->getAlignment(), TemplateArgs);
169 if (!Result.isInvalid())
170 S.AddAlignValueAttr(Aligned->getLocation(), New, Result.getAs<Expr>(),
171 Aligned->getSpellingListIndex());
172}
173
174static void instantiateDependentAllocAlignAttr(
175 Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs,
176 const AllocAlignAttr *Align, Decl *New) {
177 Expr *Param = IntegerLiteral::Create(
178 S.getASTContext(), llvm::APInt(64, Align->getParamIndex()),
179 S.getASTContext().UnsignedLongLongTy, Align->getLocation());
180 S.AddAllocAlignAttr(Align->getLocation(), New, Param,
181 Align->getSpellingListIndex());
182}
183
184static Expr *instantiateDependentFunctionAttrCondition(
185 Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs,
186 const Attr *A, Expr *OldCond, const Decl *Tmpl, FunctionDecl *New) {
187 Expr *Cond = nullptr;
188 {
189 Sema::ContextRAII SwitchContext(S, New);
190 EnterExpressionEvaluationContext Unevaluated(
191 S, Sema::ExpressionEvaluationContext::ConstantEvaluated);
192 ExprResult Result = S.SubstExpr(OldCond, TemplateArgs);
193 if (Result.isInvalid())
194 return nullptr;
195 Cond = Result.getAs<Expr>();
196 }
197 if (!Cond->isTypeDependent()) {
198 ExprResult Converted = S.PerformContextuallyConvertToBool(Cond);
199 if (Converted.isInvalid())
200 return nullptr;
201 Cond = Converted.get();
202 }
203
204 SmallVector<PartialDiagnosticAt, 8> Diags;
205 if (OldCond->isValueDependent() && !Cond->isValueDependent() &&
206 !Expr::isPotentialConstantExprUnevaluated(Cond, New, Diags)) {
207 S.Diag(A->getLocation(), diag::err_attr_cond_never_constant_expr) << A;
208 for (const auto &P : Diags)
209 S.Diag(P.first, P.second);
210 return nullptr;
211 }
212 return Cond;
213}
214
215static void instantiateDependentEnableIfAttr(
216 Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs,
217 const EnableIfAttr *EIA, const Decl *Tmpl, FunctionDecl *New) {
218 Expr *Cond = instantiateDependentFunctionAttrCondition(
219 S, TemplateArgs, EIA, EIA->getCond(), Tmpl, New);
220
221 if (Cond)
222 New->addAttr(new (S.getASTContext()) EnableIfAttr(
223 EIA->getLocation(), S.getASTContext(), Cond, EIA->getMessage(),
224 EIA->getSpellingListIndex()));
225}
226
227static void instantiateDependentDiagnoseIfAttr(
228 Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs,
229 const DiagnoseIfAttr *DIA, const Decl *Tmpl, FunctionDecl *New) {
230 Expr *Cond = instantiateDependentFunctionAttrCondition(
231 S, TemplateArgs, DIA, DIA->getCond(), Tmpl, New);
232
233 if (Cond)
234 New->addAttr(new (S.getASTContext()) DiagnoseIfAttr(
235 DIA->getLocation(), S.getASTContext(), Cond, DIA->getMessage(),
236 DIA->getDiagnosticType(), DIA->getArgDependent(), New,
237 DIA->getSpellingListIndex()));
238}
239
240// Constructs and adds to New a new instance of CUDALaunchBoundsAttr using
241// template A as the base and arguments from TemplateArgs.
242static void instantiateDependentCUDALaunchBoundsAttr(
243 Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs,
244 const CUDALaunchBoundsAttr &Attr, Decl *New) {
245 // The alignment expression is a constant expression.
246 EnterExpressionEvaluationContext Unevaluated(
247 S, Sema::ExpressionEvaluationContext::ConstantEvaluated);
248
249 ExprResult Result = S.SubstExpr(Attr.getMaxThreads(), TemplateArgs);
250 if (Result.isInvalid())
251 return;
252 Expr *MaxThreads = Result.getAs<Expr>();
253
254 Expr *MinBlocks = nullptr;
255 if (Attr.getMinBlocks()) {
256 Result = S.SubstExpr(Attr.getMinBlocks(), TemplateArgs);
257 if (Result.isInvalid())
258 return;
259 MinBlocks = Result.getAs<Expr>();
260 }
261
262 S.AddLaunchBoundsAttr(Attr.getLocation(), New, MaxThreads, MinBlocks,
263 Attr.getSpellingListIndex());
264}
265
266static void
267instantiateDependentModeAttr(Sema &S,
268 const MultiLevelTemplateArgumentList &TemplateArgs,
269 const ModeAttr &Attr, Decl *New) {
270 S.AddModeAttr(Attr.getRange(), New, Attr.getMode(),
271 Attr.getSpellingListIndex(), /*InInstantiation=*/true);
272}
273
274/// Instantiation of 'declare simd' attribute and its arguments.
275static void instantiateOMPDeclareSimdDeclAttr(
276 Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs,
277 const OMPDeclareSimdDeclAttr &Attr, Decl *New) {
278 // Allow 'this' in clauses with varlists.
279 if (auto *FTD = dyn_cast<FunctionTemplateDecl>(New))
280 New = FTD->getTemplatedDecl();
281 auto *FD = cast<FunctionDecl>(New);
282 auto *ThisContext = dyn_cast_or_null<CXXRecordDecl>(FD->getDeclContext());
283 SmallVector<Expr *, 4> Uniforms, Aligneds, Alignments, Linears, Steps;
284 SmallVector<unsigned, 4> LinModifiers;
285
286 auto &&Subst = [&](Expr *E) -> ExprResult {
287 if (auto *DRE = dyn_cast<DeclRefExpr>(E->IgnoreParenImpCasts()))
288 if (auto *PVD = dyn_cast<ParmVarDecl>(DRE->getDecl())) {
289 Sema::ContextRAII SavedContext(S, FD);
290 LocalInstantiationScope Local(S);
291 if (FD->getNumParams() > PVD->getFunctionScopeIndex())
292 Local.InstantiatedLocal(
293 PVD, FD->getParamDecl(PVD->getFunctionScopeIndex()));
294 return S.SubstExpr(E, TemplateArgs);
295 }
296 Sema::CXXThisScopeRAII ThisScope(S, ThisContext, /*TypeQuals=*/0,
297 FD->isCXXInstanceMember());
298 return S.SubstExpr(E, TemplateArgs);
299 };
300
301 ExprResult Simdlen;
302 if (auto *E = Attr.getSimdlen())
303 Simdlen = Subst(E);
304
305 if (Attr.uniforms_size() > 0) {
306 for(auto *E : Attr.uniforms()) {
307 ExprResult Inst = Subst(E);
308 if (Inst.isInvalid())
309 continue;
310 Uniforms.push_back(Inst.get());
311 }
312 }
313
314 auto AI = Attr.alignments_begin();
315 for (auto *E : Attr.aligneds()) {
316 ExprResult Inst = Subst(E);
317 if (Inst.isInvalid())
318 continue;
319 Aligneds.push_back(Inst.get());
320 Inst = ExprEmpty();
321 if (*AI)
322 Inst = S.SubstExpr(*AI, TemplateArgs);
323 Alignments.push_back(Inst.get());
324 ++AI;
325 }
326
327 auto SI = Attr.steps_begin();
328 for (auto *E : Attr.linears()) {
329 ExprResult Inst = Subst(E);
330 if (Inst.isInvalid())
331 continue;
332 Linears.push_back(Inst.get());
333 Inst = ExprEmpty();
334 if (*SI)
335 Inst = S.SubstExpr(*SI, TemplateArgs);
336 Steps.push_back(Inst.get());
337 ++SI;
338 }
339 LinModifiers.append(Attr.modifiers_begin(), Attr.modifiers_end());
340 (void)S.ActOnOpenMPDeclareSimdDirective(
341 S.ConvertDeclToDeclGroup(New), Attr.getBranchState(), Simdlen.get(),
342 Uniforms, Aligneds, Alignments, Linears, LinModifiers, Steps,
343 Attr.getRange());
344}
345
346static bool DeclContainsAttr(const Decl *D, const Attr *NewAttr) {
347 if (!D->hasAttrs() || NewAttr->duplicatesAllowed())
348 return false;
349 return llvm::find_if(D->getAttrs(), [NewAttr](const Attr *Attr) {
350 return Attr->getKind() == NewAttr->getKind();
351 }) != D->getAttrs().end();
352}
353
354void Sema::InstantiateAttrsForDecl(
355 const MultiLevelTemplateArgumentList &TemplateArgs, const Decl *Tmpl,
356 Decl *New, LateInstantiatedAttrVec *LateAttrs,
357 LocalInstantiationScope *OuterMostScope) {
358 if (NamedDecl *ND = dyn_cast<NamedDecl>(New)) {
359 for (const auto *TmplAttr : Tmpl->attrs()) {
360 // FIXME: If any of the special case versions from InstantiateAttrs become
361 // applicable to template declaration, we'll need to add them here.
362 CXXThisScopeRAII ThisScope(
363 *this, dyn_cast_or_null<CXXRecordDecl>(ND->getDeclContext()),
364 /*TypeQuals*/ 0, ND->isCXXInstanceMember());
365
366 Attr *NewAttr = sema::instantiateTemplateAttributeForDecl(
367 TmplAttr, Context, *this, TemplateArgs);
368 if (NewAttr && !DeclContainsAttr(New, NewAttr))
369 New->addAttr(NewAttr);
370 }
371 }
372}
373
374void Sema::InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs,
375 const Decl *Tmpl, Decl *New,
376 LateInstantiatedAttrVec *LateAttrs,
377 LocalInstantiationScope *OuterMostScope) {
378 for (const auto *TmplAttr : Tmpl->attrs()) {
379 // FIXME: This should be generalized to more than just the AlignedAttr.
380 const AlignedAttr *Aligned = dyn_cast<AlignedAttr>(TmplAttr);
381 if (Aligned && Aligned->isAlignmentDependent()) {
382 instantiateDependentAlignedAttr(*this, TemplateArgs, Aligned, New);
383 continue;
384 }
385
386 const AssumeAlignedAttr *AssumeAligned = dyn_cast<AssumeAlignedAttr>(TmplAttr);
387 if (AssumeAligned) {
388 instantiateDependentAssumeAlignedAttr(*this, TemplateArgs, AssumeAligned, New);
389 continue;
390 }
391
392 const AlignValueAttr *AlignValue = dyn_cast<AlignValueAttr>(TmplAttr);
393 if (AlignValue) {
394 instantiateDependentAlignValueAttr(*this, TemplateArgs, AlignValue, New);
395 continue;
396 }
397
398 if (const auto *AllocAlign = dyn_cast<AllocAlignAttr>(TmplAttr)) {
399 instantiateDependentAllocAlignAttr(*this, TemplateArgs, AllocAlign, New);
400 continue;
401 }
402
403
404 if (const auto *EnableIf = dyn_cast<EnableIfAttr>(TmplAttr)) {
405 instantiateDependentEnableIfAttr(*this, TemplateArgs, EnableIf, Tmpl,
406 cast<FunctionDecl>(New));
407 continue;
408 }
409
410 if (const auto *DiagnoseIf = dyn_cast<DiagnoseIfAttr>(TmplAttr)) {
411 instantiateDependentDiagnoseIfAttr(*this, TemplateArgs, DiagnoseIf, Tmpl,
412 cast<FunctionDecl>(New));
413 continue;
414 }
415
416 if (const CUDALaunchBoundsAttr *CUDALaunchBounds =
417 dyn_cast<CUDALaunchBoundsAttr>(TmplAttr)) {
418 instantiateDependentCUDALaunchBoundsAttr(*this, TemplateArgs,
419 *CUDALaunchBounds, New);
420 continue;
421 }
422
423 if (const ModeAttr *Mode = dyn_cast<ModeAttr>(TmplAttr)) {
424 instantiateDependentModeAttr(*this, TemplateArgs, *Mode, New);
425 continue;
426 }
427
428 if (const auto *OMPAttr = dyn_cast<OMPDeclareSimdDeclAttr>(TmplAttr)) {
429 instantiateOMPDeclareSimdDeclAttr(*this, TemplateArgs, *OMPAttr, New);
430 continue;
431 }
432
433 // Existing DLL attribute on the instantiation takes precedence.
434 if (TmplAttr->getKind() == attr::DLLExport ||
435 TmplAttr->getKind() == attr::DLLImport) {
436 if (New->hasAttr<DLLExportAttr>() || New->hasAttr<DLLImportAttr>()) {
437 continue;
438 }
439 }
440
441 if (auto ABIAttr = dyn_cast<ParameterABIAttr>(TmplAttr)) {
442 AddParameterABIAttr(ABIAttr->getRange(), New, ABIAttr->getABI(),
443 ABIAttr->getSpellingListIndex());
444 continue;
445 }
446
447 if (isa<NSConsumedAttr>(TmplAttr) || isa<CFConsumedAttr>(TmplAttr)) {
448 AddNSConsumedAttr(TmplAttr->getRange(), New,
449 TmplAttr->getSpellingListIndex(),
450 isa<NSConsumedAttr>(TmplAttr),
451 /*template instantiation*/ true);
452 continue;
453 }
454
455 assert(!TmplAttr->isPackExpansion())(static_cast <bool> (!TmplAttr->isPackExpansion()) ?
void (0) : __assert_fail ("!TmplAttr->isPackExpansion()",
"/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 455, __extension__ __PRETTY_FUNCTION__));
456 if (TmplAttr->isLateParsed() && LateAttrs) {
457 // Late parsed attributes must be instantiated and attached after the
458 // enclosing class has been instantiated. See Sema::InstantiateClass.
459 LocalInstantiationScope *Saved = nullptr;
460 if (CurrentInstantiationScope)
461 Saved = CurrentInstantiationScope->cloneScopes(OuterMostScope);
462 LateAttrs->push_back(LateInstantiatedAttribute(TmplAttr, Saved, New));
463 } else {
464 // Allow 'this' within late-parsed attributes.
465 NamedDecl *ND = dyn_cast<NamedDecl>(New);
466 CXXRecordDecl *ThisContext =
467 dyn_cast_or_null<CXXRecordDecl>(ND->getDeclContext());
468 CXXThisScopeRAII ThisScope(*this, ThisContext, /*TypeQuals*/0,
469 ND && ND->isCXXInstanceMember());
470
471 Attr *NewAttr = sema::instantiateTemplateAttribute(TmplAttr, Context,
472 *this, TemplateArgs);
473
474 if (NewAttr && !DeclContainsAttr(New, NewAttr))
475 New->addAttr(NewAttr);
476 }
477 }
478}
479
480/// Get the previous declaration of a declaration for the purposes of template
481/// instantiation. If this finds a previous declaration, then the previous
482/// declaration of the instantiation of D should be an instantiation of the
483/// result of this function.
484template<typename DeclT>
485static DeclT *getPreviousDeclForInstantiation(DeclT *D) {
486 DeclT *Result = D->getPreviousDecl();
487
488 // If the declaration is within a class, and the previous declaration was
489 // merged from a different definition of that class, then we don't have a
490 // previous declaration for the purpose of template instantiation.
491 if (Result && isa<CXXRecordDecl>(D->getDeclContext()) &&
492 D->getLexicalDeclContext() != Result->getLexicalDeclContext())
493 return nullptr;
494
495 return Result;
496}
497
498Decl *
499TemplateDeclInstantiator::VisitTranslationUnitDecl(TranslationUnitDecl *D) {
500 llvm_unreachable("Translation units cannot be instantiated")::llvm::llvm_unreachable_internal("Translation units cannot be instantiated"
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 500);
501}
502
503Decl *
504TemplateDeclInstantiator::VisitPragmaCommentDecl(PragmaCommentDecl *D) {
505 llvm_unreachable("pragma comment cannot be instantiated")::llvm::llvm_unreachable_internal("pragma comment cannot be instantiated"
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 505);
506}
507
508Decl *TemplateDeclInstantiator::VisitPragmaDetectMismatchDecl(
509 PragmaDetectMismatchDecl *D) {
510 llvm_unreachable("pragma comment cannot be instantiated")::llvm::llvm_unreachable_internal("pragma comment cannot be instantiated"
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 510);
511}
512
513Decl *
514TemplateDeclInstantiator::VisitExternCContextDecl(ExternCContextDecl *D) {
515 llvm_unreachable("extern \"C\" context cannot be instantiated")::llvm::llvm_unreachable_internal("extern \"C\" context cannot be instantiated"
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 515);
516}
517
518Decl *
519TemplateDeclInstantiator::VisitLabelDecl(LabelDecl *D) {
520 LabelDecl *Inst = LabelDecl::Create(SemaRef.Context, Owner, D->getLocation(),
521 D->getIdentifier());
522 Owner->addDecl(Inst);
523 return Inst;
524}
525
526Decl *
527TemplateDeclInstantiator::VisitNamespaceDecl(NamespaceDecl *D) {
528 llvm_unreachable("Namespaces cannot be instantiated")::llvm::llvm_unreachable_internal("Namespaces cannot be instantiated"
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 528);
529}
530
531Decl *
532TemplateDeclInstantiator::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
533 NamespaceAliasDecl *Inst
534 = NamespaceAliasDecl::Create(SemaRef.Context, Owner,
535 D->getNamespaceLoc(),
536 D->getAliasLoc(),
537 D->getIdentifier(),
538 D->getQualifierLoc(),
539 D->getTargetNameLoc(),
540 D->getNamespace());
541 Owner->addDecl(Inst);
542 return Inst;
543}
544
545Decl *TemplateDeclInstantiator::InstantiateTypedefNameDecl(TypedefNameDecl *D,
546 bool IsTypeAlias) {
547 bool Invalid = false;
548 TypeSourceInfo *DI = D->getTypeSourceInfo();
549 if (DI->getType()->isInstantiationDependentType() ||
550 DI->getType()->isVariablyModifiedType()) {
551 DI = SemaRef.SubstType(DI, TemplateArgs,
552 D->getLocation(), D->getDeclName());
553 if (!DI) {
554 Invalid = true;
555 DI = SemaRef.Context.getTrivialTypeSourceInfo(SemaRef.Context.IntTy);
556 }
557 } else {
558 SemaRef.MarkDeclarationsReferencedInType(D->getLocation(), DI->getType());
559 }
560
561 // HACK: g++ has a bug where it gets the value kind of ?: wrong.
562 // libstdc++ relies upon this bug in its implementation of common_type.
563 // If we happen to be processing that implementation, fake up the g++ ?:
564 // semantics. See LWG issue 2141 for more information on the bug.
565 const DecltypeType *DT = DI->getType()->getAs<DecltypeType>();
566 CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D->getDeclContext());
567 if (DT && RD && isa<ConditionalOperator>(DT->getUnderlyingExpr()) &&
568 DT->isReferenceType() &&
569 RD->getEnclosingNamespaceContext() == SemaRef.getStdNamespace() &&
570 RD->getIdentifier() && RD->getIdentifier()->isStr("common_type") &&
571 D->getIdentifier() && D->getIdentifier()->isStr("type") &&
572 SemaRef.getSourceManager().isInSystemHeader(D->getLocStart()))
573 // Fold it to the (non-reference) type which g++ would have produced.
574 DI = SemaRef.Context.getTrivialTypeSourceInfo(
575 DI->getType().getNonReferenceType());
576
577 // Create the new typedef
578 TypedefNameDecl *Typedef;
579 if (IsTypeAlias)
580 Typedef = TypeAliasDecl::Create(SemaRef.Context, Owner, D->getLocStart(),
581 D->getLocation(), D->getIdentifier(), DI);
582 else
583 Typedef = TypedefDecl::Create(SemaRef.Context, Owner, D->getLocStart(),
584 D->getLocation(), D->getIdentifier(), DI);
585 if (Invalid)
586 Typedef->setInvalidDecl();
587
588 // If the old typedef was the name for linkage purposes of an anonymous
589 // tag decl, re-establish that relationship for the new typedef.
590 if (const TagType *oldTagType = D->getUnderlyingType()->getAs<TagType>()) {
591 TagDecl *oldTag = oldTagType->getDecl();
592 if (oldTag->getTypedefNameForAnonDecl() == D && !Invalid) {
593 TagDecl *newTag = DI->getType()->castAs<TagType>()->getDecl();
594 assert(!newTag->hasNameForLinkage())(static_cast <bool> (!newTag->hasNameForLinkage()) ?
void (0) : __assert_fail ("!newTag->hasNameForLinkage()",
"/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 594, __extension__ __PRETTY_FUNCTION__));
595 newTag->setTypedefNameForAnonDecl(Typedef);
596 }
597 }
598
599 if (TypedefNameDecl *Prev = getPreviousDeclForInstantiation(D)) {
600 NamedDecl *InstPrev = SemaRef.FindInstantiatedDecl(D->getLocation(), Prev,
601 TemplateArgs);
602 if (!InstPrev)
603 return nullptr;
604
605 TypedefNameDecl *InstPrevTypedef = cast<TypedefNameDecl>(InstPrev);
606
607 // If the typedef types are not identical, reject them.
608 SemaRef.isIncompatibleTypedef(InstPrevTypedef, Typedef);
609
610 Typedef->setPreviousDecl(InstPrevTypedef);
611 }
612
613 SemaRef.InstantiateAttrs(TemplateArgs, D, Typedef);
614
615 Typedef->setAccess(D->getAccess());
616
617 return Typedef;
618}
619
620Decl *TemplateDeclInstantiator::VisitTypedefDecl(TypedefDecl *D) {
621 Decl *Typedef = InstantiateTypedefNameDecl(D, /*IsTypeAlias=*/false);
622 if (Typedef)
623 Owner->addDecl(Typedef);
624 return Typedef;
625}
626
627Decl *TemplateDeclInstantiator::VisitTypeAliasDecl(TypeAliasDecl *D) {
628 Decl *Typedef = InstantiateTypedefNameDecl(D, /*IsTypeAlias=*/true);
629 if (Typedef)
630 Owner->addDecl(Typedef);
631 return Typedef;
632}
633
634Decl *
635TemplateDeclInstantiator::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
636 // Create a local instantiation scope for this type alias template, which
637 // will contain the instantiations of the template parameters.
638 LocalInstantiationScope Scope(SemaRef);
639
640 TemplateParameterList *TempParams = D->getTemplateParameters();
641 TemplateParameterList *InstParams = SubstTemplateParams(TempParams);
642 if (!InstParams)
643 return nullptr;
644
645 TypeAliasDecl *Pattern = D->getTemplatedDecl();
646
647 TypeAliasTemplateDecl *PrevAliasTemplate = nullptr;
648 if (getPreviousDeclForInstantiation<TypedefNameDecl>(Pattern)) {
649 DeclContext::lookup_result Found = Owner->lookup(Pattern->getDeclName());
650 if (!Found.empty()) {
651 PrevAliasTemplate = dyn_cast<TypeAliasTemplateDecl>(Found.front());
652 }
653 }
654
655 TypeAliasDecl *AliasInst = cast_or_null<TypeAliasDecl>(
656 InstantiateTypedefNameDecl(Pattern, /*IsTypeAlias=*/true));
657 if (!AliasInst)
658 return nullptr;
659
660 TypeAliasTemplateDecl *Inst
661 = TypeAliasTemplateDecl::Create(SemaRef.Context, Owner, D->getLocation(),
662 D->getDeclName(), InstParams, AliasInst);
663 AliasInst->setDescribedAliasTemplate(Inst);
664 if (PrevAliasTemplate)
665 Inst->setPreviousDecl(PrevAliasTemplate);
666
667 Inst->setAccess(D->getAccess());
668
669 if (!PrevAliasTemplate)
670 Inst->setInstantiatedFromMemberTemplate(D);
671
672 Owner->addDecl(Inst);
673
674 return Inst;
675}
676
677Decl *TemplateDeclInstantiator::VisitBindingDecl(BindingDecl *D) {
678 auto *NewBD = BindingDecl::Create(SemaRef.Context, Owner, D->getLocation(),
679 D->getIdentifier());
680 NewBD->setReferenced(D->isReferenced());
681 SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, NewBD);
682 return NewBD;
683}
684
685Decl *TemplateDeclInstantiator::VisitDecompositionDecl(DecompositionDecl *D) {
686 // Transform the bindings first.
687 SmallVector<BindingDecl*, 16> NewBindings;
688 for (auto *OldBD : D->bindings())
689 NewBindings.push_back(cast<BindingDecl>(VisitBindingDecl(OldBD)));
690 ArrayRef<BindingDecl*> NewBindingArray = NewBindings;
691
692 auto *NewDD = cast_or_null<DecompositionDecl>(
693 VisitVarDecl(D, /*InstantiatingVarTemplate=*/false, &NewBindingArray));
694
695 if (!NewDD || NewDD->isInvalidDecl())
696 for (auto *NewBD : NewBindings)
697 NewBD->setInvalidDecl();
698
699 return NewDD;
700}
701
702Decl *TemplateDeclInstantiator::VisitVarDecl(VarDecl *D) {
703 return VisitVarDecl(D, /*InstantiatingVarTemplate=*/false);
704}
705
706Decl *TemplateDeclInstantiator::VisitVarDecl(VarDecl *D,
707 bool InstantiatingVarTemplate,
708 ArrayRef<BindingDecl*> *Bindings) {
709
710 // Do substitution on the type of the declaration
711 TypeSourceInfo *DI = SemaRef.SubstType(
712 D->getTypeSourceInfo(), TemplateArgs, D->getTypeSpecStartLoc(),
713 D->getDeclName(), /*AllowDeducedTST*/true);
714 if (!DI)
715 return nullptr;
716
717 if (DI->getType()->isFunctionType()) {
718 SemaRef.Diag(D->getLocation(), diag::err_variable_instantiates_to_function)
719 << D->isStaticDataMember() << DI->getType();
720 return nullptr;
721 }
722
723 DeclContext *DC = Owner;
724 if (D->isLocalExternDecl())
725 SemaRef.adjustContextForLocalExternDecl(DC);
726
727 // Build the instantiated declaration.
728 VarDecl *Var;
729 if (Bindings)
730 Var = DecompositionDecl::Create(SemaRef.Context, DC, D->getInnerLocStart(),
731 D->getLocation(), DI->getType(), DI,
732 D->getStorageClass(), *Bindings);
733 else
734 Var = VarDecl::Create(SemaRef.Context, DC, D->getInnerLocStart(),
735 D->getLocation(), D->getIdentifier(), DI->getType(),
736 DI, D->getStorageClass());
737
738 // In ARC, infer 'retaining' for variables of retainable type.
739 if (SemaRef.getLangOpts().ObjCAutoRefCount &&
740 SemaRef.inferObjCARCLifetime(Var))
741 Var->setInvalidDecl();
742
743 // Substitute the nested name specifier, if any.
744 if (SubstQualifier(D, Var))
745 return nullptr;
746
747 SemaRef.BuildVariableInstantiation(Var, D, TemplateArgs, LateAttrs, Owner,
748 StartingScope, InstantiatingVarTemplate);
749
750 if (D->isNRVOVariable()) {
751 QualType ReturnType = cast<FunctionDecl>(DC)->getReturnType();
752 if (SemaRef.isCopyElisionCandidate(ReturnType, Var, false))
753 Var->setNRVOVariable(true);
754 }
755
756 Var->setImplicit(D->isImplicit());
757
758 return Var;
759}
760
761Decl *TemplateDeclInstantiator::VisitAccessSpecDecl(AccessSpecDecl *D) {
762 AccessSpecDecl* AD
763 = AccessSpecDecl::Create(SemaRef.Context, D->getAccess(), Owner,
764 D->getAccessSpecifierLoc(), D->getColonLoc());
765 Owner->addHiddenDecl(AD);
766 return AD;
767}
768
769Decl *TemplateDeclInstantiator::VisitFieldDecl(FieldDecl *D) {
770 bool Invalid = false;
771 TypeSourceInfo *DI = D->getTypeSourceInfo();
772 if (DI->getType()->isInstantiationDependentType() ||
773 DI->getType()->isVariablyModifiedType()) {
774 DI = SemaRef.SubstType(DI, TemplateArgs,
775 D->getLocation(), D->getDeclName());
776 if (!DI) {
777 DI = D->getTypeSourceInfo();
778 Invalid = true;
779 } else if (DI->getType()->isFunctionType()) {
780 // C++ [temp.arg.type]p3:
781 // If a declaration acquires a function type through a type
782 // dependent on a template-parameter and this causes a
783 // declaration that does not use the syntactic form of a
784 // function declarator to have function type, the program is
785 // ill-formed.
786 SemaRef.Diag(D->getLocation(), diag::err_field_instantiates_to_function)
787 << DI->getType();
788 Invalid = true;
789 }
790 } else {
791 SemaRef.MarkDeclarationsReferencedInType(D->getLocation(), DI->getType());
792 }
793
794 Expr *BitWidth = D->getBitWidth();
795 if (Invalid)
796 BitWidth = nullptr;
797 else if (BitWidth) {
798 // The bit-width expression is a constant expression.
799 EnterExpressionEvaluationContext Unevaluated(
800 SemaRef, Sema::ExpressionEvaluationContext::ConstantEvaluated);
801
802 ExprResult InstantiatedBitWidth
803 = SemaRef.SubstExpr(BitWidth, TemplateArgs);
804 if (InstantiatedBitWidth.isInvalid()) {
805 Invalid = true;
806 BitWidth = nullptr;
807 } else
808 BitWidth = InstantiatedBitWidth.getAs<Expr>();
809 }
810
811 FieldDecl *Field = SemaRef.CheckFieldDecl(D->getDeclName(),
812 DI->getType(), DI,
813 cast<RecordDecl>(Owner),
814 D->getLocation(),
815 D->isMutable(),
816 BitWidth,
817 D->getInClassInitStyle(),
818 D->getInnerLocStart(),
819 D->getAccess(),
820 nullptr);
821 if (!Field) {
822 cast<Decl>(Owner)->setInvalidDecl();
823 return nullptr;
824 }
825
826 SemaRef.InstantiateAttrs(TemplateArgs, D, Field, LateAttrs, StartingScope);
827
828 if (Field->hasAttrs())
829 SemaRef.CheckAlignasUnderalignment(Field);
830
831 if (Invalid)
832 Field->setInvalidDecl();
833
834 if (!Field->getDeclName()) {
835 // Keep track of where this decl came from.
836 SemaRef.Context.setInstantiatedFromUnnamedFieldDecl(Field, D);
837 }
838 if (CXXRecordDecl *Parent= dyn_cast<CXXRecordDecl>(Field->getDeclContext())) {
839 if (Parent->isAnonymousStructOrUnion() &&
840 Parent->getRedeclContext()->isFunctionOrMethod())
841 SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Field);
842 }
843
844 Field->setImplicit(D->isImplicit());
845 Field->setAccess(D->getAccess());
846 Owner->addDecl(Field);
847
848 return Field;
849}
850
851Decl *TemplateDeclInstantiator::VisitMSPropertyDecl(MSPropertyDecl *D) {
852 bool Invalid = false;
853 TypeSourceInfo *DI = D->getTypeSourceInfo();
854
855 if (DI->getType()->isVariablyModifiedType()) {
856 SemaRef.Diag(D->getLocation(), diag::err_property_is_variably_modified)
857 << D;
858 Invalid = true;
859 } else if (DI->getType()->isInstantiationDependentType()) {
860 DI = SemaRef.SubstType(DI, TemplateArgs,
861 D->getLocation(), D->getDeclName());
862 if (!DI) {
863 DI = D->getTypeSourceInfo();
864 Invalid = true;
865 } else if (DI->getType()->isFunctionType()) {
866 // C++ [temp.arg.type]p3:
867 // If a declaration acquires a function type through a type
868 // dependent on a template-parameter and this causes a
869 // declaration that does not use the syntactic form of a
870 // function declarator to have function type, the program is
871 // ill-formed.
872 SemaRef.Diag(D->getLocation(), diag::err_field_instantiates_to_function)
873 << DI->getType();
874 Invalid = true;
875 }
876 } else {
877 SemaRef.MarkDeclarationsReferencedInType(D->getLocation(), DI->getType());
878 }
879
880 MSPropertyDecl *Property = MSPropertyDecl::Create(
881 SemaRef.Context, Owner, D->getLocation(), D->getDeclName(), DI->getType(),
882 DI, D->getLocStart(), D->getGetterId(), D->getSetterId());
883
884 SemaRef.InstantiateAttrs(TemplateArgs, D, Property, LateAttrs,
885 StartingScope);
886
887 if (Invalid)
888 Property->setInvalidDecl();
889
890 Property->setAccess(D->getAccess());
891 Owner->addDecl(Property);
892
893 return Property;
894}
895
896Decl *TemplateDeclInstantiator::VisitIndirectFieldDecl(IndirectFieldDecl *D) {
897 NamedDecl **NamedChain =
898 new (SemaRef.Context)NamedDecl*[D->getChainingSize()];
899
900 int i = 0;
901 for (auto *PI : D->chain()) {
902 NamedDecl *Next = SemaRef.FindInstantiatedDecl(D->getLocation(), PI,
903 TemplateArgs);
904 if (!Next)
905 return nullptr;
906
907 NamedChain[i++] = Next;
908 }
909
910 QualType T = cast<FieldDecl>(NamedChain[i-1])->getType();
911 IndirectFieldDecl *IndirectField = IndirectFieldDecl::Create(
912 SemaRef.Context, Owner, D->getLocation(), D->getIdentifier(), T,
913 {NamedChain, D->getChainingSize()});
914
915 for (const auto *Attr : D->attrs())
916 IndirectField->addAttr(Attr->clone(SemaRef.Context));
917
918 IndirectField->setImplicit(D->isImplicit());
919 IndirectField->setAccess(D->getAccess());
920 Owner->addDecl(IndirectField);
921 return IndirectField;
922}
923
924Decl *TemplateDeclInstantiator::VisitFriendDecl(FriendDecl *D) {
925 // Handle friend type expressions by simply substituting template
926 // parameters into the pattern type and checking the result.
927 if (TypeSourceInfo *Ty = D->getFriendType()) {
928 TypeSourceInfo *InstTy;
929 // If this is an unsupported friend, don't bother substituting template
930 // arguments into it. The actual type referred to won't be used by any
931 // parts of Clang, and may not be valid for instantiating. Just use the
932 // same info for the instantiated friend.
933 if (D->isUnsupportedFriend()) {
934 InstTy = Ty;
935 } else {
936 InstTy = SemaRef.SubstType(Ty, TemplateArgs,
937 D->getLocation(), DeclarationName());
938 }
939 if (!InstTy)
940 return nullptr;
941
942 FriendDecl *FD = SemaRef.CheckFriendTypeDecl(D->getLocStart(),
943 D->getFriendLoc(), InstTy);
944 if (!FD)
945 return nullptr;
946
947 FD->setAccess(AS_public);
948 FD->setUnsupportedFriend(D->isUnsupportedFriend());
949 Owner->addDecl(FD);
950 return FD;
951 }
952
953 NamedDecl *ND = D->getFriendDecl();
954 assert(ND && "friend decl must be a decl or a type!")(static_cast <bool> (ND && "friend decl must be a decl or a type!"
) ? void (0) : __assert_fail ("ND && \"friend decl must be a decl or a type!\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 954, __extension__ __PRETTY_FUNCTION__));
955
956 // All of the Visit implementations for the various potential friend
957 // declarations have to be carefully written to work for friend
958 // objects, with the most important detail being that the target
959 // decl should almost certainly not be placed in Owner.
960 Decl *NewND = Visit(ND);
961 if (!NewND) return nullptr;
962
963 FriendDecl *FD =
964 FriendDecl::Create(SemaRef.Context, Owner, D->getLocation(),
965 cast<NamedDecl>(NewND), D->getFriendLoc());
966 FD->setAccess(AS_public);
967 FD->setUnsupportedFriend(D->isUnsupportedFriend());
968 Owner->addDecl(FD);
969 return FD;
970}
971
972Decl *TemplateDeclInstantiator::VisitStaticAssertDecl(StaticAssertDecl *D) {
973 Expr *AssertExpr = D->getAssertExpr();
974
975 // The expression in a static assertion is a constant expression.
976 EnterExpressionEvaluationContext Unevaluated(
977 SemaRef, Sema::ExpressionEvaluationContext::ConstantEvaluated);
978
979 ExprResult InstantiatedAssertExpr
980 = SemaRef.SubstExpr(AssertExpr, TemplateArgs);
981 if (InstantiatedAssertExpr.isInvalid())
982 return nullptr;
983
984 return SemaRef.BuildStaticAssertDeclaration(D->getLocation(),
985 InstantiatedAssertExpr.get(),
986 D->getMessage(),
987 D->getRParenLoc(),
988 D->isFailed());
989}
990
991Decl *TemplateDeclInstantiator::VisitEnumDecl(EnumDecl *D) {
992 EnumDecl *PrevDecl = nullptr;
993 if (EnumDecl *PatternPrev = getPreviousDeclForInstantiation(D)) {
994 NamedDecl *Prev = SemaRef.FindInstantiatedDecl(D->getLocation(),
995 PatternPrev,
996 TemplateArgs);
997 if (!Prev) return nullptr;
998 PrevDecl = cast<EnumDecl>(Prev);
999 }
1000
1001 EnumDecl *Enum = EnumDecl::Create(SemaRef.Context, Owner, D->getLocStart(),
1002 D->getLocation(), D->getIdentifier(),
1003 PrevDecl, D->isScoped(),
1004 D->isScopedUsingClassTag(), D->isFixed());
1005 if (D->isFixed()) {
1006 if (TypeSourceInfo *TI = D->getIntegerTypeSourceInfo()) {
1007 // If we have type source information for the underlying type, it means it
1008 // has been explicitly set by the user. Perform substitution on it before
1009 // moving on.
1010 SourceLocation UnderlyingLoc = TI->getTypeLoc().getBeginLoc();
1011 TypeSourceInfo *NewTI = SemaRef.SubstType(TI, TemplateArgs, UnderlyingLoc,
1012 DeclarationName());
1013 if (!NewTI || SemaRef.CheckEnumUnderlyingType(NewTI))
1014 Enum->setIntegerType(SemaRef.Context.IntTy);
1015 else
1016 Enum->setIntegerTypeSourceInfo(NewTI);
1017 } else {
1018 assert(!D->getIntegerType()->isDependentType()(static_cast <bool> (!D->getIntegerType()->isDependentType
() && "Dependent type without type source info") ? void
(0) : __assert_fail ("!D->getIntegerType()->isDependentType() && \"Dependent type without type source info\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1019, __extension__ __PRETTY_FUNCTION__))
1019 && "Dependent type without type source info")(static_cast <bool> (!D->getIntegerType()->isDependentType
() && "Dependent type without type source info") ? void
(0) : __assert_fail ("!D->getIntegerType()->isDependentType() && \"Dependent type without type source info\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1019, __extension__ __PRETTY_FUNCTION__));
1020 Enum->setIntegerType(D->getIntegerType());
1021 }
1022 }
1023
1024 SemaRef.InstantiateAttrs(TemplateArgs, D, Enum);
1025
1026 Enum->setInstantiationOfMemberEnum(D, TSK_ImplicitInstantiation);
1027 Enum->setAccess(D->getAccess());
1028 // Forward the mangling number from the template to the instantiated decl.
1029 SemaRef.Context.setManglingNumber(Enum, SemaRef.Context.getManglingNumber(D));
1030 // See if the old tag was defined along with a declarator.
1031 // If it did, mark the new tag as being associated with that declarator.
1032 if (DeclaratorDecl *DD = SemaRef.Context.getDeclaratorForUnnamedTagDecl(D))
1033 SemaRef.Context.addDeclaratorForUnnamedTagDecl(Enum, DD);
1034 // See if the old tag was defined along with a typedef.
1035 // If it did, mark the new tag as being associated with that typedef.
1036 if (TypedefNameDecl *TND = SemaRef.Context.getTypedefNameForUnnamedTagDecl(D))
1037 SemaRef.Context.addTypedefNameForUnnamedTagDecl(Enum, TND);
1038 if (SubstQualifier(D, Enum)) return nullptr;
1039 Owner->addDecl(Enum);
1040
1041 EnumDecl *Def = D->getDefinition();
1042 if (Def && Def != D) {
1043 // If this is an out-of-line definition of an enum member template, check
1044 // that the underlying types match in the instantiation of both
1045 // declarations.
1046 if (TypeSourceInfo *TI = Def->getIntegerTypeSourceInfo()) {
1047 SourceLocation UnderlyingLoc = TI->getTypeLoc().getBeginLoc();
1048 QualType DefnUnderlying =
1049 SemaRef.SubstType(TI->getType(), TemplateArgs,
1050 UnderlyingLoc, DeclarationName());
1051 SemaRef.CheckEnumRedeclaration(Def->getLocation(), Def->isScoped(),
1052 DefnUnderlying,
1053 /*EnumUnderlyingIsImplicit=*/false, Enum);
1054 }
1055 }
1056
1057 // C++11 [temp.inst]p1: The implicit instantiation of a class template
1058 // specialization causes the implicit instantiation of the declarations, but
1059 // not the definitions of scoped member enumerations.
1060 //
1061 // DR1484 clarifies that enumeration definitions inside of a template
1062 // declaration aren't considered entities that can be separately instantiated
1063 // from the rest of the entity they are declared inside of.
1064 if (isDeclWithinFunction(D) ? D == Def : Def && !Enum->isScoped()) {
1065 SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Enum);
1066 InstantiateEnumDefinition(Enum, Def);
1067 }
1068
1069 return Enum;
1070}
1071
1072void TemplateDeclInstantiator::InstantiateEnumDefinition(
1073 EnumDecl *Enum, EnumDecl *Pattern) {
1074 Enum->startDefinition();
1075
1076 // Update the location to refer to the definition.
1077 Enum->setLocation(Pattern->getLocation());
1078
1079 SmallVector<Decl*, 4> Enumerators;
1080
1081 EnumConstantDecl *LastEnumConst = nullptr;
1082 for (auto *EC : Pattern->enumerators()) {
1083 // The specified value for the enumerator.
1084 ExprResult Value((Expr *)nullptr);
1085 if (Expr *UninstValue = EC->getInitExpr()) {
1086 // The enumerator's value expression is a constant expression.
1087 EnterExpressionEvaluationContext Unevaluated(
1088 SemaRef, Sema::ExpressionEvaluationContext::ConstantEvaluated);
1089
1090 Value = SemaRef.SubstExpr(UninstValue, TemplateArgs);
1091 }
1092
1093 // Drop the initial value and continue.
1094 bool isInvalid = false;
1095 if (Value.isInvalid()) {
1096 Value = nullptr;
1097 isInvalid = true;
1098 }
1099
1100 EnumConstantDecl *EnumConst
1101 = SemaRef.CheckEnumConstant(Enum, LastEnumConst,
1102 EC->getLocation(), EC->getIdentifier(),
1103 Value.get());
1104
1105 if (isInvalid) {
1106 if (EnumConst)
1107 EnumConst->setInvalidDecl();
1108 Enum->setInvalidDecl();
1109 }
1110
1111 if (EnumConst) {
1112 SemaRef.InstantiateAttrs(TemplateArgs, EC, EnumConst);
1113
1114 EnumConst->setAccess(Enum->getAccess());
1115 Enum->addDecl(EnumConst);
1116 Enumerators.push_back(EnumConst);
1117 LastEnumConst = EnumConst;
1118
1119 if (Pattern->getDeclContext()->isFunctionOrMethod() &&
1120 !Enum->isScoped()) {
1121 // If the enumeration is within a function or method, record the enum
1122 // constant as a local.
1123 SemaRef.CurrentInstantiationScope->InstantiatedLocal(EC, EnumConst);
1124 }
1125 }
1126 }
1127
1128 SemaRef.ActOnEnumBody(Enum->getLocation(), Enum->getBraceRange(), Enum,
1129 Enumerators,
1130 nullptr, nullptr);
1131}
1132
1133Decl *TemplateDeclInstantiator::VisitEnumConstantDecl(EnumConstantDecl *D) {
1134 llvm_unreachable("EnumConstantDecls can only occur within EnumDecls.")::llvm::llvm_unreachable_internal("EnumConstantDecls can only occur within EnumDecls."
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1134);
1135}
1136
1137Decl *
1138TemplateDeclInstantiator::VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D) {
1139 llvm_unreachable("BuiltinTemplateDecls cannot be instantiated.")::llvm::llvm_unreachable_internal("BuiltinTemplateDecls cannot be instantiated."
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1139);
1140}
1141
1142Decl *TemplateDeclInstantiator::VisitClassTemplateDecl(ClassTemplateDecl *D) {
1143 bool isFriend = (D->getFriendObjectKind() != Decl::FOK_None);
1144
1145 // Create a local instantiation scope for this class template, which
1146 // will contain the instantiations of the template parameters.
1147 LocalInstantiationScope Scope(SemaRef);
1148 TemplateParameterList *TempParams = D->getTemplateParameters();
1149 TemplateParameterList *InstParams = SubstTemplateParams(TempParams);
1150 if (!InstParams)
1151 return nullptr;
1152
1153 CXXRecordDecl *Pattern = D->getTemplatedDecl();
1154
1155 // Instantiate the qualifier. We have to do this first in case
1156 // we're a friend declaration, because if we are then we need to put
1157 // the new declaration in the appropriate context.
1158 NestedNameSpecifierLoc QualifierLoc = Pattern->getQualifierLoc();
1159 if (QualifierLoc) {
1160 QualifierLoc = SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc,
1161 TemplateArgs);
1162 if (!QualifierLoc)
1163 return nullptr;
1164 }
1165
1166 CXXRecordDecl *PrevDecl = nullptr;
1167 ClassTemplateDecl *PrevClassTemplate = nullptr;
1168
1169 if (!isFriend && getPreviousDeclForInstantiation(Pattern)) {
1170 DeclContext::lookup_result Found = Owner->lookup(Pattern->getDeclName());
1171 if (!Found.empty()) {
1172 PrevClassTemplate = dyn_cast<ClassTemplateDecl>(Found.front());
1173 if (PrevClassTemplate)
1174 PrevDecl = PrevClassTemplate->getTemplatedDecl();
1175 }
1176 }
1177
1178 // If this isn't a friend, then it's a member template, in which
1179 // case we just want to build the instantiation in the
1180 // specialization. If it is a friend, we want to build it in
1181 // the appropriate context.
1182 DeclContext *DC = Owner;
1183 if (isFriend) {
1184 if (QualifierLoc) {
1185 CXXScopeSpec SS;
1186 SS.Adopt(QualifierLoc);
1187 DC = SemaRef.computeDeclContext(SS);
1188 if (!DC) return nullptr;
1189 } else {
1190 DC = SemaRef.FindInstantiatedContext(Pattern->getLocation(),
1191 Pattern->getDeclContext(),
1192 TemplateArgs);
1193 }
1194
1195 // Look for a previous declaration of the template in the owning
1196 // context.
1197 LookupResult R(SemaRef, Pattern->getDeclName(), Pattern->getLocation(),
1198 Sema::LookupOrdinaryName,
1199 SemaRef.forRedeclarationInCurContext());
1200 SemaRef.LookupQualifiedName(R, DC);
1201
1202 if (R.isSingleResult()) {
1203 PrevClassTemplate = R.getAsSingle<ClassTemplateDecl>();
1204 if (PrevClassTemplate)
1205 PrevDecl = PrevClassTemplate->getTemplatedDecl();
1206 }
1207
1208 if (!PrevClassTemplate && QualifierLoc) {
1209 SemaRef.Diag(Pattern->getLocation(), diag::err_not_tag_in_scope)
1210 << D->getTemplatedDecl()->getTagKind() << Pattern->getDeclName() << DC
1211 << QualifierLoc.getSourceRange();
1212 return nullptr;
1213 }
1214
1215 bool AdoptedPreviousTemplateParams = false;
1216 if (PrevClassTemplate) {
1217 bool Complain = true;
1218
1219 // HACK: libstdc++ 4.2.1 contains an ill-formed friend class
1220 // template for struct std::tr1::__detail::_Map_base, where the
1221 // template parameters of the friend declaration don't match the
1222 // template parameters of the original declaration. In this one
1223 // case, we don't complain about the ill-formed friend
1224 // declaration.
1225 if (isFriend && Pattern->getIdentifier() &&
1226 Pattern->getIdentifier()->isStr("_Map_base") &&
1227 DC->isNamespace() &&
1228 cast<NamespaceDecl>(DC)->getIdentifier() &&
1229 cast<NamespaceDecl>(DC)->getIdentifier()->isStr("__detail")) {
1230 DeclContext *DCParent = DC->getParent();
1231 if (DCParent->isNamespace() &&
1232 cast<NamespaceDecl>(DCParent)->getIdentifier() &&
1233 cast<NamespaceDecl>(DCParent)->getIdentifier()->isStr("tr1")) {
1234 if (cast<Decl>(DCParent)->isInStdNamespace())
1235 Complain = false;
1236 }
1237 }
1238
1239 TemplateParameterList *PrevParams
1240 = PrevClassTemplate->getTemplateParameters();
1241
1242 // Make sure the parameter lists match.
1243 if (!SemaRef.TemplateParameterListsAreEqual(InstParams, PrevParams,
1244 Complain,
1245 Sema::TPL_TemplateMatch)) {
1246 if (Complain)
1247 return nullptr;
1248
1249 AdoptedPreviousTemplateParams = true;
1250 InstParams = PrevParams;
1251 }
1252
1253 // Do some additional validation, then merge default arguments
1254 // from the existing declarations.
1255 if (!AdoptedPreviousTemplateParams &&
1256 SemaRef.CheckTemplateParameterList(InstParams, PrevParams,
1257 Sema::TPC_ClassTemplate))
1258 return nullptr;
1259 }
1260 }
1261
1262 CXXRecordDecl *RecordInst
1263 = CXXRecordDecl::Create(SemaRef.Context, Pattern->getTagKind(), DC,
1264 Pattern->getLocStart(), Pattern->getLocation(),
1265 Pattern->getIdentifier(), PrevDecl,
1266 /*DelayTypeCreation=*/true);
1267
1268 if (QualifierLoc)
1269 RecordInst->setQualifierInfo(QualifierLoc);
1270
1271 ClassTemplateDecl *Inst
1272 = ClassTemplateDecl::Create(SemaRef.Context, DC, D->getLocation(),
1273 D->getIdentifier(), InstParams, RecordInst);
1274 assert(!(isFriend && Owner->isDependentContext()))(static_cast <bool> (!(isFriend && Owner->isDependentContext
())) ? void (0) : __assert_fail ("!(isFriend && Owner->isDependentContext())"
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1274, __extension__ __PRETTY_FUNCTION__));
1275 Inst->setPreviousDecl(PrevClassTemplate);
1276
1277 RecordInst->setDescribedClassTemplate(Inst);
1278
1279 if (isFriend) {
1280 if (PrevClassTemplate)
1281 Inst->setAccess(PrevClassTemplate->getAccess());
1282 else
1283 Inst->setAccess(D->getAccess());
1284
1285 Inst->setObjectOfFriendDecl();
1286 // TODO: do we want to track the instantiation progeny of this
1287 // friend target decl?
1288 } else {
1289 Inst->setAccess(D->getAccess());
1290 if (!PrevClassTemplate)
1291 Inst->setInstantiatedFromMemberTemplate(D);
1292 }
1293
1294 // Trigger creation of the type for the instantiation.
1295 SemaRef.Context.getInjectedClassNameType(RecordInst,
1296 Inst->getInjectedClassNameSpecialization());
1297
1298 // Finish handling of friends.
1299 if (isFriend) {
1300 DC->makeDeclVisibleInContext(Inst);
1301 Inst->setLexicalDeclContext(Owner);
1302 RecordInst->setLexicalDeclContext(Owner);
1303 return Inst;
1304 }
1305
1306 if (D->isOutOfLine()) {
1307 Inst->setLexicalDeclContext(D->getLexicalDeclContext());
1308 RecordInst->setLexicalDeclContext(D->getLexicalDeclContext());
1309 }
1310
1311 Owner->addDecl(Inst);
1312
1313 if (!PrevClassTemplate) {
1314 // Queue up any out-of-line partial specializations of this member
1315 // class template; the client will force their instantiation once
1316 // the enclosing class has been instantiated.
1317 SmallVector<ClassTemplatePartialSpecializationDecl *, 4> PartialSpecs;
1318 D->getPartialSpecializations(PartialSpecs);
1319 for (unsigned I = 0, N = PartialSpecs.size(); I != N; ++I)
1320 if (PartialSpecs[I]->getFirstDecl()->isOutOfLine())
1321 OutOfLinePartialSpecs.push_back(std::make_pair(Inst, PartialSpecs[I]));
1322 }
1323
1324 return Inst;
1325}
1326
1327Decl *
1328TemplateDeclInstantiator::VisitClassTemplatePartialSpecializationDecl(
1329 ClassTemplatePartialSpecializationDecl *D) {
1330 ClassTemplateDecl *ClassTemplate = D->getSpecializedTemplate();
1331
1332 // Lookup the already-instantiated declaration in the instantiation
1333 // of the class template and return that.
1334 DeclContext::lookup_result Found
1335 = Owner->lookup(ClassTemplate->getDeclName());
1336 if (Found.empty())
1337 return nullptr;
1338
1339 ClassTemplateDecl *InstClassTemplate
1340 = dyn_cast<ClassTemplateDecl>(Found.front());
1341 if (!InstClassTemplate)
1342 return nullptr;
1343
1344 if (ClassTemplatePartialSpecializationDecl *Result
1345 = InstClassTemplate->findPartialSpecInstantiatedFromMember(D))
1346 return Result;
1347
1348 return InstantiateClassTemplatePartialSpecialization(InstClassTemplate, D);
1349}
1350
1351Decl *TemplateDeclInstantiator::VisitVarTemplateDecl(VarTemplateDecl *D) {
1352 assert(D->getTemplatedDecl()->isStaticDataMember() &&(static_cast <bool> (D->getTemplatedDecl()->isStaticDataMember
() && "Only static data member templates are allowed."
) ? void (0) : __assert_fail ("D->getTemplatedDecl()->isStaticDataMember() && \"Only static data member templates are allowed.\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1353, __extension__ __PRETTY_FUNCTION__))
1353 "Only static data member templates are allowed.")(static_cast <bool> (D->getTemplatedDecl()->isStaticDataMember
() && "Only static data member templates are allowed."
) ? void (0) : __assert_fail ("D->getTemplatedDecl()->isStaticDataMember() && \"Only static data member templates are allowed.\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1353, __extension__ __PRETTY_FUNCTION__));
1354
1355 // Create a local instantiation scope for this variable template, which
1356 // will contain the instantiations of the template parameters.
1357 LocalInstantiationScope Scope(SemaRef);
1358 TemplateParameterList *TempParams = D->getTemplateParameters();
1359 TemplateParameterList *InstParams = SubstTemplateParams(TempParams);
1360 if (!InstParams)
1361 return nullptr;
1362
1363 VarDecl *Pattern = D->getTemplatedDecl();
1364 VarTemplateDecl *PrevVarTemplate = nullptr;
1365
1366 if (getPreviousDeclForInstantiation(Pattern)) {
1367 DeclContext::lookup_result Found = Owner->lookup(Pattern->getDeclName());
1368 if (!Found.empty())
1369 PrevVarTemplate = dyn_cast<VarTemplateDecl>(Found.front());
1370 }
1371
1372 VarDecl *VarInst =
1373 cast_or_null<VarDecl>(VisitVarDecl(Pattern,
1374 /*InstantiatingVarTemplate=*/true));
1375 if (!VarInst) return nullptr;
1376
1377 DeclContext *DC = Owner;
1378
1379 VarTemplateDecl *Inst = VarTemplateDecl::Create(
1380 SemaRef.Context, DC, D->getLocation(), D->getIdentifier(), InstParams,
1381 VarInst);
1382 VarInst->setDescribedVarTemplate(Inst);
1383 Inst->setPreviousDecl(PrevVarTemplate);
1384
1385 Inst->setAccess(D->getAccess());
1386 if (!PrevVarTemplate)
1387 Inst->setInstantiatedFromMemberTemplate(D);
1388
1389 if (D->isOutOfLine()) {
1390 Inst->setLexicalDeclContext(D->getLexicalDeclContext());
1391 VarInst->setLexicalDeclContext(D->getLexicalDeclContext());
1392 }
1393
1394 Owner->addDecl(Inst);
1395
1396 if (!PrevVarTemplate) {
1397 // Queue up any out-of-line partial specializations of this member
1398 // variable template; the client will force their instantiation once
1399 // the enclosing class has been instantiated.
1400 SmallVector<VarTemplatePartialSpecializationDecl *, 4> PartialSpecs;
1401 D->getPartialSpecializations(PartialSpecs);
1402 for (unsigned I = 0, N = PartialSpecs.size(); I != N; ++I)
1403 if (PartialSpecs[I]->getFirstDecl()->isOutOfLine())
1404 OutOfLineVarPartialSpecs.push_back(
1405 std::make_pair(Inst, PartialSpecs[I]));
1406 }
1407
1408 return Inst;
1409}
1410
1411Decl *TemplateDeclInstantiator::VisitVarTemplatePartialSpecializationDecl(
1412 VarTemplatePartialSpecializationDecl *D) {
1413 assert(D->isStaticDataMember() &&(static_cast <bool> (D->isStaticDataMember() &&
"Only static data member templates are allowed.") ? void (0)
: __assert_fail ("D->isStaticDataMember() && \"Only static data member templates are allowed.\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1414, __extension__ __PRETTY_FUNCTION__))
1414 "Only static data member templates are allowed.")(static_cast <bool> (D->isStaticDataMember() &&
"Only static data member templates are allowed.") ? void (0)
: __assert_fail ("D->isStaticDataMember() && \"Only static data member templates are allowed.\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1414, __extension__ __PRETTY_FUNCTION__));
1415
1416 VarTemplateDecl *VarTemplate = D->getSpecializedTemplate();
1417
1418 // Lookup the already-instantiated declaration and return that.
1419 DeclContext::lookup_result Found = Owner->lookup(VarTemplate->getDeclName());
1420 assert(!Found.empty() && "Instantiation found nothing?")(static_cast <bool> (!Found.empty() && "Instantiation found nothing?"
) ? void (0) : __assert_fail ("!Found.empty() && \"Instantiation found nothing?\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1420, __extension__ __PRETTY_FUNCTION__));
1421
1422 VarTemplateDecl *InstVarTemplate = dyn_cast<VarTemplateDecl>(Found.front());
1423 assert(InstVarTemplate && "Instantiation did not find a variable template?")(static_cast <bool> (InstVarTemplate && "Instantiation did not find a variable template?"
) ? void (0) : __assert_fail ("InstVarTemplate && \"Instantiation did not find a variable template?\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1423, __extension__ __PRETTY_FUNCTION__));
1424
1425 if (VarTemplatePartialSpecializationDecl *Result =
1426 InstVarTemplate->findPartialSpecInstantiatedFromMember(D))
1427 return Result;
1428
1429 return InstantiateVarTemplatePartialSpecialization(InstVarTemplate, D);
1430}
1431
1432Decl *
1433TemplateDeclInstantiator::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
1434 // Create a local instantiation scope for this function template, which
1435 // will contain the instantiations of the template parameters and then get
1436 // merged with the local instantiation scope for the function template
1437 // itself.
1438 LocalInstantiationScope Scope(SemaRef);
1439
1440 TemplateParameterList *TempParams = D->getTemplateParameters();
1441 TemplateParameterList *InstParams = SubstTemplateParams(TempParams);
1442 if (!InstParams)
1443 return nullptr;
1444
1445 FunctionDecl *Instantiated = nullptr;
1446 if (CXXMethodDecl *DMethod = dyn_cast<CXXMethodDecl>(D->getTemplatedDecl()))
1447 Instantiated = cast_or_null<FunctionDecl>(VisitCXXMethodDecl(DMethod,
1448 InstParams));
1449 else
1450 Instantiated = cast_or_null<FunctionDecl>(VisitFunctionDecl(
1451 D->getTemplatedDecl(),
1452 InstParams));
1453
1454 if (!Instantiated)
1455 return nullptr;
1456
1457 // Link the instantiated function template declaration to the function
1458 // template from which it was instantiated.
1459 FunctionTemplateDecl *InstTemplate
1460 = Instantiated->getDescribedFunctionTemplate();
1461 InstTemplate->setAccess(D->getAccess());
1462 assert(InstTemplate &&(static_cast <bool> (InstTemplate && "VisitFunctionDecl/CXXMethodDecl didn't create a template!"
) ? void (0) : __assert_fail ("InstTemplate && \"VisitFunctionDecl/CXXMethodDecl didn't create a template!\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1463, __extension__ __PRETTY_FUNCTION__))
1463 "VisitFunctionDecl/CXXMethodDecl didn't create a template!")(static_cast <bool> (InstTemplate && "VisitFunctionDecl/CXXMethodDecl didn't create a template!"
) ? void (0) : __assert_fail ("InstTemplate && \"VisitFunctionDecl/CXXMethodDecl didn't create a template!\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1463, __extension__ __PRETTY_FUNCTION__));
1464
1465 bool isFriend = (InstTemplate->getFriendObjectKind() != Decl::FOK_None);
1466
1467 // Link the instantiation back to the pattern *unless* this is a
1468 // non-definition friend declaration.
1469 if (!InstTemplate->getInstantiatedFromMemberTemplate() &&
1470 !(isFriend && !D->getTemplatedDecl()->isThisDeclarationADefinition()))
1471 InstTemplate->setInstantiatedFromMemberTemplate(D);
1472
1473 // Make declarations visible in the appropriate context.
1474 if (!isFriend) {
1475 Owner->addDecl(InstTemplate);
1476 } else if (InstTemplate->getDeclContext()->isRecord() &&
1477 !getPreviousDeclForInstantiation(D)) {
1478 SemaRef.CheckFriendAccess(InstTemplate);
1479 }
1480
1481 return InstTemplate;
1482}
1483
1484Decl *TemplateDeclInstantiator::VisitCXXRecordDecl(CXXRecordDecl *D) {
1485 CXXRecordDecl *PrevDecl = nullptr;
1486 if (D->isInjectedClassName())
1487 PrevDecl = cast<CXXRecordDecl>(Owner);
1488 else if (CXXRecordDecl *PatternPrev = getPreviousDeclForInstantiation(D)) {
1489 NamedDecl *Prev = SemaRef.FindInstantiatedDecl(D->getLocation(),
1490 PatternPrev,
1491 TemplateArgs);
1492 if (!Prev) return nullptr;
1493 PrevDecl = cast<CXXRecordDecl>(Prev);
1494 }
1495
1496 CXXRecordDecl *Record
1497 = CXXRecordDecl::Create(SemaRef.Context, D->getTagKind(), Owner,
1498 D->getLocStart(), D->getLocation(),
1499 D->getIdentifier(), PrevDecl);
1500
1501 // Substitute the nested name specifier, if any.
1502 if (SubstQualifier(D, Record))
1503 return nullptr;
1504
1505 Record->setImplicit(D->isImplicit());
1506 // FIXME: Check against AS_none is an ugly hack to work around the issue that
1507 // the tag decls introduced by friend class declarations don't have an access
1508 // specifier. Remove once this area of the code gets sorted out.
1509 if (D->getAccess() != AS_none)
1510 Record->setAccess(D->getAccess());
1511 if (!D->isInjectedClassName())
1512 Record->setInstantiationOfMemberClass(D, TSK_ImplicitInstantiation);
1513
1514 // If the original function was part of a friend declaration,
1515 // inherit its namespace state.
1516 if (D->getFriendObjectKind())
1517 Record->setObjectOfFriendDecl();
1518
1519 // Make sure that anonymous structs and unions are recorded.
1520 if (D->isAnonymousStructOrUnion())
1521 Record->setAnonymousStructOrUnion(true);
1522
1523 if (D->isLocalClass())
1524 SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Record);
1525
1526 // Forward the mangling number from the template to the instantiated decl.
1527 SemaRef.Context.setManglingNumber(Record,
1528 SemaRef.Context.getManglingNumber(D));
1529
1530 // See if the old tag was defined along with a declarator.
1531 // If it did, mark the new tag as being associated with that declarator.
1532 if (DeclaratorDecl *DD = SemaRef.Context.getDeclaratorForUnnamedTagDecl(D))
1533 SemaRef.Context.addDeclaratorForUnnamedTagDecl(Record, DD);
1534
1535 // See if the old tag was defined along with a typedef.
1536 // If it did, mark the new tag as being associated with that typedef.
1537 if (TypedefNameDecl *TND = SemaRef.Context.getTypedefNameForUnnamedTagDecl(D))
1538 SemaRef.Context.addTypedefNameForUnnamedTagDecl(Record, TND);
1539
1540 Owner->addDecl(Record);
1541
1542 // DR1484 clarifies that the members of a local class are instantiated as part
1543 // of the instantiation of their enclosing entity.
1544 if (D->isCompleteDefinition() && D->isLocalClass()) {
1545 Sema::LocalEagerInstantiationScope LocalInstantiations(SemaRef);
1546
1547 SemaRef.InstantiateClass(D->getLocation(), Record, D, TemplateArgs,
1548 TSK_ImplicitInstantiation,
1549 /*Complain=*/true);
1550
1551 // For nested local classes, we will instantiate the members when we
1552 // reach the end of the outermost (non-nested) local class.
1553 if (!D->isCXXClassMember())
1554 SemaRef.InstantiateClassMembers(D->getLocation(), Record, TemplateArgs,
1555 TSK_ImplicitInstantiation);
1556
1557 // This class may have local implicit instantiations that need to be
1558 // performed within this scope.
1559 LocalInstantiations.perform();
1560 }
1561
1562 SemaRef.DiagnoseUnusedNestedTypedefs(Record);
1563
1564 return Record;
1565}
1566
1567/// \brief Adjust the given function type for an instantiation of the
1568/// given declaration, to cope with modifications to the function's type that
1569/// aren't reflected in the type-source information.
1570///
1571/// \param D The declaration we're instantiating.
1572/// \param TInfo The already-instantiated type.
1573static QualType adjustFunctionTypeForInstantiation(ASTContext &Context,
1574 FunctionDecl *D,
1575 TypeSourceInfo *TInfo) {
1576 const FunctionProtoType *OrigFunc
1577 = D->getType()->castAs<FunctionProtoType>();
1578 const FunctionProtoType *NewFunc
1579 = TInfo->getType()->castAs<FunctionProtoType>();
1580 if (OrigFunc->getExtInfo() == NewFunc->getExtInfo())
1581 return TInfo->getType();
1582
1583 FunctionProtoType::ExtProtoInfo NewEPI = NewFunc->getExtProtoInfo();
1584 NewEPI.ExtInfo = OrigFunc->getExtInfo();
1585 return Context.getFunctionType(NewFunc->getReturnType(),
1586 NewFunc->getParamTypes(), NewEPI);
1587}
1588
1589/// Normal class members are of more specific types and therefore
1590/// don't make it here. This function serves two purposes:
1591/// 1) instantiating function templates
1592/// 2) substituting friend declarations
1593Decl *TemplateDeclInstantiator::VisitFunctionDecl(FunctionDecl *D,
1594 TemplateParameterList *TemplateParams) {
1595 // Check whether there is already a function template specialization for
1596 // this declaration.
1597 FunctionTemplateDecl *FunctionTemplate = D->getDescribedFunctionTemplate();
1598 if (FunctionTemplate && !TemplateParams) {
1599 ArrayRef<TemplateArgument> Innermost = TemplateArgs.getInnermost();
1600
1601 void *InsertPos = nullptr;
1602 FunctionDecl *SpecFunc
1603 = FunctionTemplate->findSpecialization(Innermost, InsertPos);
1604
1605 // If we already have a function template specialization, return it.
1606 if (SpecFunc)
1607 return SpecFunc;
1608 }
1609
1610 bool isFriend;
1611 if (FunctionTemplate)
1612 isFriend = (FunctionTemplate->getFriendObjectKind() != Decl::FOK_None);
1613 else
1614 isFriend = (D->getFriendObjectKind() != Decl::FOK_None);
1615
1616 bool MergeWithParentScope = (TemplateParams != nullptr) ||
1617 Owner->isFunctionOrMethod() ||
1618 !(isa<Decl>(Owner) &&
1619 cast<Decl>(Owner)->isDefinedOutsideFunctionOrMethod());
1620 LocalInstantiationScope Scope(SemaRef, MergeWithParentScope);
1621
1622 SmallVector<ParmVarDecl *, 4> Params;
1623 TypeSourceInfo *TInfo = SubstFunctionType(D, Params);
1624 if (!TInfo)
1625 return nullptr;
1626 QualType T = adjustFunctionTypeForInstantiation(SemaRef.Context, D, TInfo);
1627
1628 NestedNameSpecifierLoc QualifierLoc = D->getQualifierLoc();
1629 if (QualifierLoc) {
1630 QualifierLoc = SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc,
1631 TemplateArgs);
1632 if (!QualifierLoc)
1633 return nullptr;
1634 }
1635
1636 // If we're instantiating a local function declaration, put the result
1637 // in the enclosing namespace; otherwise we need to find the instantiated
1638 // context.
1639 DeclContext *DC;
1640 if (D->isLocalExternDecl()) {
1641 DC = Owner;
1642 SemaRef.adjustContextForLocalExternDecl(DC);
1643 } else if (isFriend && QualifierLoc) {
1644 CXXScopeSpec SS;
1645 SS.Adopt(QualifierLoc);
1646 DC = SemaRef.computeDeclContext(SS);
1647 if (!DC) return nullptr;
1648 } else {
1649 DC = SemaRef.FindInstantiatedContext(D->getLocation(), D->getDeclContext(),
1650 TemplateArgs);
1651 }
1652
1653 FunctionDecl *Function;
1654 if (auto *DGuide = dyn_cast<CXXDeductionGuideDecl>(D)) {
1655 Function = CXXDeductionGuideDecl::Create(
1656 SemaRef.Context, DC, D->getInnerLocStart(), DGuide->isExplicit(),
1657 D->getNameInfo(), T, TInfo, D->getSourceRange().getEnd());
1658 if (DGuide->isCopyDeductionCandidate())
1659 cast<CXXDeductionGuideDecl>(Function)->setIsCopyDeductionCandidate();
1660 } else {
1661 Function = FunctionDecl::Create(
1662 SemaRef.Context, DC, D->getInnerLocStart(), D->getNameInfo(), T, TInfo,
1663 D->getCanonicalDecl()->getStorageClass(), D->isInlineSpecified(),
1664 D->hasWrittenPrototype(), D->isConstexpr());
1665 Function->setRangeEnd(D->getSourceRange().getEnd());
1666 }
1667
1668 if (D->isInlined())
1669 Function->setImplicitlyInline();
1670
1671 if (QualifierLoc)
1672 Function->setQualifierInfo(QualifierLoc);
1673
1674 if (D->isLocalExternDecl())
1675 Function->setLocalExternDecl();
1676
1677 DeclContext *LexicalDC = Owner;
1678 if (!isFriend && D->isOutOfLine() && !D->isLocalExternDecl()) {
1679 assert(D->getDeclContext()->isFileContext())(static_cast <bool> (D->getDeclContext()->isFileContext
()) ? void (0) : __assert_fail ("D->getDeclContext()->isFileContext()"
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1679, __extension__ __PRETTY_FUNCTION__));
1680 LexicalDC = D->getDeclContext();
1681 }
1682
1683 Function->setLexicalDeclContext(LexicalDC);
1684
1685 // Attach the parameters
1686 for (unsigned P = 0; P < Params.size(); ++P)
1687 if (Params[P])
1688 Params[P]->setOwningFunction(Function);
1689 Function->setParams(Params);
1690
1691 if (TemplateParams) {
1692 // Our resulting instantiation is actually a function template, since we
1693 // are substituting only the outer template parameters. For example, given
1694 //
1695 // template<typename T>
1696 // struct X {
1697 // template<typename U> friend void f(T, U);
1698 // };
1699 //
1700 // X<int> x;
1701 //
1702 // We are instantiating the friend function template "f" within X<int>,
1703 // which means substituting int for T, but leaving "f" as a friend function
1704 // template.
1705 // Build the function template itself.
1706 FunctionTemplate = FunctionTemplateDecl::Create(SemaRef.Context, DC,
1707 Function->getLocation(),
1708 Function->getDeclName(),
1709 TemplateParams, Function);
1710 Function->setDescribedFunctionTemplate(FunctionTemplate);
1711
1712 FunctionTemplate->setLexicalDeclContext(LexicalDC);
1713
1714 if (isFriend && D->isThisDeclarationADefinition()) {
1715 FunctionTemplate->setInstantiatedFromMemberTemplate(
1716 D->getDescribedFunctionTemplate());
1717 }
1718 } else if (FunctionTemplate) {
1719 // Record this function template specialization.
1720 ArrayRef<TemplateArgument> Innermost = TemplateArgs.getInnermost();
1721 Function->setFunctionTemplateSpecialization(FunctionTemplate,
1722 TemplateArgumentList::CreateCopy(SemaRef.Context,
1723 Innermost),
1724 /*InsertPos=*/nullptr);
1725 } else if (isFriend && D->isThisDeclarationADefinition()) {
1726 // Do not connect the friend to the template unless it's actually a
1727 // definition. We don't want non-template functions to be marked as being
1728 // template instantiations.
1729 Function->setInstantiationOfMemberFunction(D, TSK_ImplicitInstantiation);
1730 }
1731
1732 if (InitFunctionInstantiation(Function, D))
1733 Function->setInvalidDecl();
1734
1735 bool isExplicitSpecialization = false;
1736
1737 LookupResult Previous(
1738 SemaRef, Function->getDeclName(), SourceLocation(),
1739 D->isLocalExternDecl() ? Sema::LookupRedeclarationWithLinkage
1740 : Sema::LookupOrdinaryName,
1741 D->isLocalExternDecl() ? Sema::ForExternalRedeclaration
1742 : SemaRef.forRedeclarationInCurContext());
1743
1744 if (DependentFunctionTemplateSpecializationInfo *Info
1745 = D->getDependentSpecializationInfo()) {
1746 assert(isFriend && "non-friend has dependent specialization info?")(static_cast <bool> (isFriend && "non-friend has dependent specialization info?"
) ? void (0) : __assert_fail ("isFriend && \"non-friend has dependent specialization info?\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1746, __extension__ __PRETTY_FUNCTION__));
1747
1748 // This needs to be set now for future sanity.
1749 Function->setObjectOfFriendDecl();
1750
1751 // Instantiate the explicit template arguments.
1752 TemplateArgumentListInfo ExplicitArgs(Info->getLAngleLoc(),
1753 Info->getRAngleLoc());
1754 if (SemaRef.Subst(Info->getTemplateArgs(), Info->getNumTemplateArgs(),
1755 ExplicitArgs, TemplateArgs))
1756 return nullptr;
1757
1758 // Map the candidate templates to their instantiations.
1759 for (unsigned I = 0, E = Info->getNumTemplates(); I != E; ++I) {
1760 Decl *Temp = SemaRef.FindInstantiatedDecl(D->getLocation(),
1761 Info->getTemplate(I),
1762 TemplateArgs);
1763 if (!Temp) return nullptr;
1764
1765 Previous.addDecl(cast<FunctionTemplateDecl>(Temp));
1766 }
1767
1768 if (SemaRef.CheckFunctionTemplateSpecialization(Function,
1769 &ExplicitArgs,
1770 Previous))
1771 Function->setInvalidDecl();
1772
1773 isExplicitSpecialization = true;
1774
1775 } else if (TemplateParams || !FunctionTemplate) {
1776 // Look only into the namespace where the friend would be declared to
1777 // find a previous declaration. This is the innermost enclosing namespace,
1778 // as described in ActOnFriendFunctionDecl.
1779 SemaRef.LookupQualifiedName(Previous, DC);
1780
1781 // In C++, the previous declaration we find might be a tag type
1782 // (class or enum). In this case, the new declaration will hide the
1783 // tag type. Note that this does does not apply if we're declaring a
1784 // typedef (C++ [dcl.typedef]p4).
1785 if (Previous.isSingleTagDecl())
1786 Previous.clear();
1787 }
1788
1789 if (isFriend)
1790 Function->setObjectOfFriendDecl();
1791
1792 SemaRef.CheckFunctionDeclaration(/*Scope*/ nullptr, Function, Previous,
1793 isExplicitSpecialization);
1794
1795 NamedDecl *PrincipalDecl = (TemplateParams
1796 ? cast<NamedDecl>(FunctionTemplate)
1797 : Function);
1798
1799 // If the original function was part of a friend declaration,
1800 // inherit its namespace state and add it to the owner.
1801 if (isFriend) {
1802 PrincipalDecl->setObjectOfFriendDecl();
1803 DC->makeDeclVisibleInContext(PrincipalDecl);
1804
1805 bool QueuedInstantiation = false;
1806
1807 // C++11 [temp.friend]p4 (DR329):
1808 // When a function is defined in a friend function declaration in a class
1809 // template, the function is instantiated when the function is odr-used.
1810 // The same restrictions on multiple declarations and definitions that
1811 // apply to non-template function declarations and definitions also apply
1812 // to these implicit definitions.
1813 if (D->isThisDeclarationADefinition()) {
1814 // Check for a function body.
1815 const FunctionDecl *Definition = nullptr;
1816 if (Function->isDefined(Definition) &&
1817 Definition->getTemplateSpecializationKind() == TSK_Undeclared) {
1818 SemaRef.Diag(Function->getLocation(), diag::err_redefinition)
1819 << Function->getDeclName();
1820 SemaRef.Diag(Definition->getLocation(), diag::note_previous_definition);
1821 }
1822 // Check for redefinitions due to other instantiations of this or
1823 // a similar friend function.
1824 else for (auto R : Function->redecls()) {
1825 if (R == Function)
1826 continue;
1827
1828 // If some prior declaration of this function has been used, we need
1829 // to instantiate its definition.
1830 if (!QueuedInstantiation && R->isUsed(false)) {
1831 if (MemberSpecializationInfo *MSInfo =
1832 Function->getMemberSpecializationInfo()) {
1833 if (MSInfo->getPointOfInstantiation().isInvalid()) {
1834 SourceLocation Loc = R->getLocation(); // FIXME
1835 MSInfo->setPointOfInstantiation(Loc);
1836 SemaRef.PendingLocalImplicitInstantiations.push_back(
1837 std::make_pair(Function, Loc));
1838 QueuedInstantiation = true;
1839 }
1840 }
1841 }
1842
1843 // If some prior declaration of this function was a friend with an
1844 // uninstantiated definition, reject it.
1845 if (R->getFriendObjectKind()) {
1846 if (const FunctionDecl *RPattern =
1847 R->getTemplateInstantiationPattern()) {
1848 if (RPattern->isDefined(RPattern)) {
1849 SemaRef.Diag(Function->getLocation(), diag::err_redefinition)
1850 << Function->getDeclName();
1851 SemaRef.Diag(R->getLocation(), diag::note_previous_definition);
1852 break;
1853 }
1854 }
1855 }
1856 }
1857 }
1858
1859 // Check the template parameter list against the previous declaration. The
1860 // goal here is to pick up default arguments added since the friend was
1861 // declared; we know the template parameter lists match, since otherwise
1862 // we would not have picked this template as the previous declaration.
1863 if (TemplateParams && FunctionTemplate->getPreviousDecl()) {
1864 SemaRef.CheckTemplateParameterList(
1865 TemplateParams,
1866 FunctionTemplate->getPreviousDecl()->getTemplateParameters(),
1867 Function->isThisDeclarationADefinition()
1868 ? Sema::TPC_FriendFunctionTemplateDefinition
1869 : Sema::TPC_FriendFunctionTemplate);
1870 }
1871 }
1872
1873 if (Function->isLocalExternDecl() && !Function->getPreviousDecl())
1874 DC->makeDeclVisibleInContext(PrincipalDecl);
1875
1876 if (Function->isOverloadedOperator() && !DC->isRecord() &&
1877 PrincipalDecl->isInIdentifierNamespace(Decl::IDNS_Ordinary))
1878 PrincipalDecl->setNonMemberOperator();
1879
1880 assert(!D->isDefaulted() && "only methods should be defaulted")(static_cast <bool> (!D->isDefaulted() && "only methods should be defaulted"
) ? void (0) : __assert_fail ("!D->isDefaulted() && \"only methods should be defaulted\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 1880, __extension__ __PRETTY_FUNCTION__));
1881 return Function;
1882}
1883
1884Decl *
1885TemplateDeclInstantiator::VisitCXXMethodDecl(CXXMethodDecl *D,
1886 TemplateParameterList *TemplateParams,
1887 bool IsClassScopeSpecialization) {
1888 FunctionTemplateDecl *FunctionTemplate = D->getDescribedFunctionTemplate();
1889 if (FunctionTemplate && !TemplateParams) {
1890 // We are creating a function template specialization from a function
1891 // template. Check whether there is already a function template
1892 // specialization for this particular set of template arguments.
1893 ArrayRef<TemplateArgument> Innermost = TemplateArgs.getInnermost();
1894
1895 void *InsertPos = nullptr;
1896 FunctionDecl *SpecFunc
1897 = FunctionTemplate->findSpecialization(Innermost, InsertPos);
1898
1899 // If we already have a function template specialization, return it.
1900 if (SpecFunc)
1901 return SpecFunc;
1902 }
1903
1904 bool isFriend;
1905 if (FunctionTemplate)
1906 isFriend = (FunctionTemplate->getFriendObjectKind() != Decl::FOK_None);
1907 else
1908 isFriend = (D->getFriendObjectKind() != Decl::FOK_None);
1909
1910 bool MergeWithParentScope = (TemplateParams != nullptr) ||
1911 !(isa<Decl>(Owner) &&
1912 cast<Decl>(Owner)->isDefinedOutsideFunctionOrMethod());
1913 LocalInstantiationScope Scope(SemaRef, MergeWithParentScope);
1914
1915 // Instantiate enclosing template arguments for friends.
1916 SmallVector<TemplateParameterList *, 4> TempParamLists;
1917 unsigned NumTempParamLists = 0;
1918 if (isFriend && (NumTempParamLists = D->getNumTemplateParameterLists())) {
1919 TempParamLists.resize(NumTempParamLists);
1920 for (unsigned I = 0; I != NumTempParamLists; ++I) {
1921 TemplateParameterList *TempParams = D->getTemplateParameterList(I);
1922 TemplateParameterList *InstParams = SubstTemplateParams(TempParams);
1923 if (!InstParams)
1924 return nullptr;
1925 TempParamLists[I] = InstParams;
1926 }
1927 }
1928
1929 SmallVector<ParmVarDecl *, 4> Params;
1930 TypeSourceInfo *TInfo = SubstFunctionType(D, Params);
1931 if (!TInfo)
1932 return nullptr;
1933 QualType T = adjustFunctionTypeForInstantiation(SemaRef.Context, D, TInfo);
1934
1935 NestedNameSpecifierLoc QualifierLoc = D->getQualifierLoc();
1936 if (QualifierLoc) {
1937 QualifierLoc = SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc,
1938 TemplateArgs);
1939 if (!QualifierLoc)
1940 return nullptr;
1941 }
1942
1943 DeclContext *DC = Owner;
1944 if (isFriend) {
1945 if (QualifierLoc) {
1946 CXXScopeSpec SS;
1947 SS.Adopt(QualifierLoc);
1948 DC = SemaRef.computeDeclContext(SS);
1949
1950 if (DC && SemaRef.RequireCompleteDeclContext(SS, DC))
1951 return nullptr;
1952 } else {
1953 DC = SemaRef.FindInstantiatedContext(D->getLocation(),
1954 D->getDeclContext(),
1955 TemplateArgs);
1956 }
1957 if (!DC) return nullptr;
1958 }
1959
1960 // Build the instantiated method declaration.
1961 CXXRecordDecl *Record = cast<CXXRecordDecl>(DC);
1962 CXXMethodDecl *Method = nullptr;
1963
1964 SourceLocation StartLoc = D->getInnerLocStart();
1965 DeclarationNameInfo NameInfo
1966 = SemaRef.SubstDeclarationNameInfo(D->getNameInfo(), TemplateArgs);
1967 if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(D)) {
1968 Method = CXXConstructorDecl::Create(SemaRef.Context, Record,
1969 StartLoc, NameInfo, T, TInfo,
1970 Constructor->isExplicit(),
1971 Constructor->isInlineSpecified(),
1972 false, Constructor->isConstexpr());
1973 Method->setRangeEnd(Constructor->getLocEnd());
1974 } else if (CXXDestructorDecl *Destructor = dyn_cast<CXXDestructorDecl>(D)) {
1975 Method = CXXDestructorDecl::Create(SemaRef.Context, Record,
1976 StartLoc, NameInfo, T, TInfo,
1977 Destructor->isInlineSpecified(),
1978 false);
1979 Method->setRangeEnd(Destructor->getLocEnd());
1980 } else if (CXXConversionDecl *Conversion = dyn_cast<CXXConversionDecl>(D)) {
1981 Method = CXXConversionDecl::Create(SemaRef.Context, Record,
1982 StartLoc, NameInfo, T, TInfo,
1983 Conversion->isInlineSpecified(),
1984 Conversion->isExplicit(),
1985 Conversion->isConstexpr(),
1986 Conversion->getLocEnd());
1987 } else {
1988 StorageClass SC = D->isStatic() ? SC_Static : SC_None;
1989 Method = CXXMethodDecl::Create(SemaRef.Context, Record,
1990 StartLoc, NameInfo, T, TInfo,
1991 SC, D->isInlineSpecified(),
1992 D->isConstexpr(), D->getLocEnd());
1993 }
1994
1995 if (D->isInlined())
1996 Method->setImplicitlyInline();
1997
1998 if (QualifierLoc)
1999 Method->setQualifierInfo(QualifierLoc);
2000
2001 if (TemplateParams) {
2002 // Our resulting instantiation is actually a function template, since we
2003 // are substituting only the outer template parameters. For example, given
2004 //
2005 // template<typename T>
2006 // struct X {
2007 // template<typename U> void f(T, U);
2008 // };
2009 //
2010 // X<int> x;
2011 //
2012 // We are instantiating the member template "f" within X<int>, which means
2013 // substituting int for T, but leaving "f" as a member function template.
2014 // Build the function template itself.
2015 FunctionTemplate = FunctionTemplateDecl::Create(SemaRef.Context, Record,
2016 Method->getLocation(),
2017 Method->getDeclName(),
2018 TemplateParams, Method);
2019 if (isFriend) {
2020 FunctionTemplate->setLexicalDeclContext(Owner);
2021 FunctionTemplate->setObjectOfFriendDecl();
2022 } else if (D->isOutOfLine())
2023 FunctionTemplate->setLexicalDeclContext(D->getLexicalDeclContext());
2024 Method->setDescribedFunctionTemplate(FunctionTemplate);
2025 } else if (FunctionTemplate) {
2026 // Record this function template specialization.
2027 ArrayRef<TemplateArgument> Innermost = TemplateArgs.getInnermost();
2028 Method->setFunctionTemplateSpecialization(FunctionTemplate,
2029 TemplateArgumentList::CreateCopy(SemaRef.Context,
2030 Innermost),
2031 /*InsertPos=*/nullptr);
2032 } else if (!isFriend) {
2033 // Record that this is an instantiation of a member function.
2034 Method->setInstantiationOfMemberFunction(D, TSK_ImplicitInstantiation);
2035 }
2036
2037 // If we are instantiating a member function defined
2038 // out-of-line, the instantiation will have the same lexical
2039 // context (which will be a namespace scope) as the template.
2040 if (isFriend) {
2041 if (NumTempParamLists)
2042 Method->setTemplateParameterListsInfo(
2043 SemaRef.Context,
2044 llvm::makeArrayRef(TempParamLists.data(), NumTempParamLists));
2045
2046 Method->setLexicalDeclContext(Owner);
2047 Method->setObjectOfFriendDecl();
2048 } else if (D->isOutOfLine())
2049 Method->setLexicalDeclContext(D->getLexicalDeclContext());
2050
2051 // Attach the parameters
2052 for (unsigned P = 0; P < Params.size(); ++P)
2053 Params[P]->setOwningFunction(Method);
2054 Method->setParams(Params);
2055
2056 if (InitMethodInstantiation(Method, D))
2057 Method->setInvalidDecl();
2058
2059 LookupResult Previous(SemaRef, NameInfo, Sema::LookupOrdinaryName,
2060 Sema::ForExternalRedeclaration);
2061
2062 if (!FunctionTemplate || TemplateParams || isFriend) {
2063 SemaRef.LookupQualifiedName(Previous, Record);
2064
2065 // In C++, the previous declaration we find might be a tag type
2066 // (class or enum). In this case, the new declaration will hide the
2067 // tag type. Note that this does does not apply if we're declaring a
2068 // typedef (C++ [dcl.typedef]p4).
2069 if (Previous.isSingleTagDecl())
2070 Previous.clear();
2071 }
2072
2073 if (!IsClassScopeSpecialization)
2074 SemaRef.CheckFunctionDeclaration(nullptr, Method, Previous, false);
2075
2076 if (D->isPure())
2077 SemaRef.CheckPureMethod(Method, SourceRange());
2078
2079 // Propagate access. For a non-friend declaration, the access is
2080 // whatever we're propagating from. For a friend, it should be the
2081 // previous declaration we just found.
2082 if (isFriend && Method->getPreviousDecl())
2083 Method->setAccess(Method->getPreviousDecl()->getAccess());
2084 else
2085 Method->setAccess(D->getAccess());
2086 if (FunctionTemplate)
2087 FunctionTemplate->setAccess(Method->getAccess());
2088
2089 SemaRef.CheckOverrideControl(Method);
2090
2091 // If a function is defined as defaulted or deleted, mark it as such now.
2092 if (D->isExplicitlyDefaulted())
2093 SemaRef.SetDeclDefaulted(Method, Method->getLocation());
2094 if (D->isDeletedAsWritten())
2095 SemaRef.SetDeclDeleted(Method, Method->getLocation());
2096
2097 // If there's a function template, let our caller handle it.
2098 if (FunctionTemplate) {
2099 // do nothing
2100
2101 // Don't hide a (potentially) valid declaration with an invalid one.
2102 } else if (Method->isInvalidDecl() && !Previous.empty()) {
2103 // do nothing
2104
2105 // Otherwise, check access to friends and make them visible.
2106 } else if (isFriend) {
2107 // We only need to re-check access for methods which we didn't
2108 // manage to match during parsing.
2109 if (!D->getPreviousDecl())
2110 SemaRef.CheckFriendAccess(Method);
2111
2112 Record->makeDeclVisibleInContext(Method);
2113
2114 // Otherwise, add the declaration. We don't need to do this for
2115 // class-scope specializations because we'll have matched them with
2116 // the appropriate template.
2117 } else if (!IsClassScopeSpecialization) {
2118 Owner->addDecl(Method);
2119 }
2120
2121 return Method;
2122}
2123
2124Decl *TemplateDeclInstantiator::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
2125 return VisitCXXMethodDecl(D);
2126}
2127
2128Decl *TemplateDeclInstantiator::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
2129 return VisitCXXMethodDecl(D);
2130}
2131
2132Decl *TemplateDeclInstantiator::VisitCXXConversionDecl(CXXConversionDecl *D) {
2133 return VisitCXXMethodDecl(D);
2134}
2135
2136Decl *TemplateDeclInstantiator::VisitParmVarDecl(ParmVarDecl *D) {
2137 return SemaRef.SubstParmVarDecl(D, TemplateArgs, /*indexAdjustment*/ 0, None,
2138 /*ExpectParameterPack=*/ false);
2139}
2140
2141Decl *TemplateDeclInstantiator::VisitTemplateTypeParmDecl(
2142 TemplateTypeParmDecl *D) {
2143 // TODO: don't always clone when decls are refcounted.
2144 assert(D->getTypeForDecl()->isTemplateTypeParmType())(static_cast <bool> (D->getTypeForDecl()->isTemplateTypeParmType
()) ? void (0) : __assert_fail ("D->getTypeForDecl()->isTemplateTypeParmType()"
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2144, __extension__ __PRETTY_FUNCTION__));
2145
2146 TemplateTypeParmDecl *Inst = TemplateTypeParmDecl::Create(
2147 SemaRef.Context, Owner, D->getLocStart(), D->getLocation(),
2148 D->getDepth() - TemplateArgs.getNumSubstitutedLevels(), D->getIndex(),
2149 D->getIdentifier(), D->wasDeclaredWithTypename(), D->isParameterPack());
2150 Inst->setAccess(AS_public);
2151
2152 if (D->hasDefaultArgument() && !D->defaultArgumentWasInherited()) {
2153 TypeSourceInfo *InstantiatedDefaultArg =
2154 SemaRef.SubstType(D->getDefaultArgumentInfo(), TemplateArgs,
2155 D->getDefaultArgumentLoc(), D->getDeclName());
2156 if (InstantiatedDefaultArg)
2157 Inst->setDefaultArgument(InstantiatedDefaultArg);
2158 }
2159
2160 // Introduce this template parameter's instantiation into the instantiation
2161 // scope.
2162 SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Inst);
2163
2164 return Inst;
2165}
2166
2167Decl *TemplateDeclInstantiator::VisitNonTypeTemplateParmDecl(
2168 NonTypeTemplateParmDecl *D) {
2169 // Substitute into the type of the non-type template parameter.
2170 TypeLoc TL = D->getTypeSourceInfo()->getTypeLoc();
2171 SmallVector<TypeSourceInfo *, 4> ExpandedParameterPackTypesAsWritten;
2172 SmallVector<QualType, 4> ExpandedParameterPackTypes;
2173 bool IsExpandedParameterPack = false;
2174 TypeSourceInfo *DI;
2175 QualType T;
2176 bool Invalid = false;
2177
2178 if (D->isExpandedParameterPack()) {
2179 // The non-type template parameter pack is an already-expanded pack
2180 // expansion of types. Substitute into each of the expanded types.
2181 ExpandedParameterPackTypes.reserve(D->getNumExpansionTypes());
2182 ExpandedParameterPackTypesAsWritten.reserve(D->getNumExpansionTypes());
2183 for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2184 TypeSourceInfo *NewDI =
2185 SemaRef.SubstType(D->getExpansionTypeSourceInfo(I), TemplateArgs,
2186 D->getLocation(), D->getDeclName());
2187 if (!NewDI)
2188 return nullptr;
2189
2190 QualType NewT =
2191 SemaRef.CheckNonTypeTemplateParameterType(NewDI, D->getLocation());
2192 if (NewT.isNull())
2193 return nullptr;
2194
2195 ExpandedParameterPackTypesAsWritten.push_back(NewDI);
2196 ExpandedParameterPackTypes.push_back(NewT);
2197 }
2198
2199 IsExpandedParameterPack = true;
2200 DI = D->getTypeSourceInfo();
2201 T = DI->getType();
2202 } else if (D->isPackExpansion()) {
2203 // The non-type template parameter pack's type is a pack expansion of types.
2204 // Determine whether we need to expand this parameter pack into separate
2205 // types.
2206 PackExpansionTypeLoc Expansion = TL.castAs<PackExpansionTypeLoc>();
2207 TypeLoc Pattern = Expansion.getPatternLoc();
2208 SmallVector<UnexpandedParameterPack, 2> Unexpanded;
2209 SemaRef.collectUnexpandedParameterPacks(Pattern, Unexpanded);
2210
2211 // Determine whether the set of unexpanded parameter packs can and should
2212 // be expanded.
2213 bool Expand = true;
2214 bool RetainExpansion = false;
2215 Optional<unsigned> OrigNumExpansions
2216 = Expansion.getTypePtr()->getNumExpansions();
2217 Optional<unsigned> NumExpansions = OrigNumExpansions;
2218 if (SemaRef.CheckParameterPacksForExpansion(Expansion.getEllipsisLoc(),
2219 Pattern.getSourceRange(),
2220 Unexpanded,
2221 TemplateArgs,
2222 Expand, RetainExpansion,
2223 NumExpansions))
2224 return nullptr;
2225
2226 if (Expand) {
2227 for (unsigned I = 0; I != *NumExpansions; ++I) {
2228 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, I);
2229 TypeSourceInfo *NewDI = SemaRef.SubstType(Pattern, TemplateArgs,
2230 D->getLocation(),
2231 D->getDeclName());
2232 if (!NewDI)
2233 return nullptr;
2234
2235 QualType NewT =
2236 SemaRef.CheckNonTypeTemplateParameterType(NewDI, D->getLocation());
2237 if (NewT.isNull())
2238 return nullptr;
2239
2240 ExpandedParameterPackTypesAsWritten.push_back(NewDI);
2241 ExpandedParameterPackTypes.push_back(NewT);
2242 }
2243
2244 // Note that we have an expanded parameter pack. The "type" of this
2245 // expanded parameter pack is the original expansion type, but callers
2246 // will end up using the expanded parameter pack types for type-checking.
2247 IsExpandedParameterPack = true;
2248 DI = D->getTypeSourceInfo();
2249 T = DI->getType();
2250 } else {
2251 // We cannot fully expand the pack expansion now, so substitute into the
2252 // pattern and create a new pack expansion type.
2253 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, -1);
2254 TypeSourceInfo *NewPattern = SemaRef.SubstType(Pattern, TemplateArgs,
2255 D->getLocation(),
2256 D->getDeclName());
2257 if (!NewPattern)
2258 return nullptr;
2259
2260 SemaRef.CheckNonTypeTemplateParameterType(NewPattern, D->getLocation());
2261 DI = SemaRef.CheckPackExpansion(NewPattern, Expansion.getEllipsisLoc(),
2262 NumExpansions);
2263 if (!DI)
2264 return nullptr;
2265
2266 T = DI->getType();
2267 }
2268 } else {
2269 // Simple case: substitution into a parameter that is not a parameter pack.
2270 DI = SemaRef.SubstType(D->getTypeSourceInfo(), TemplateArgs,
2271 D->getLocation(), D->getDeclName());
2272 if (!DI)
2273 return nullptr;
2274
2275 // Check that this type is acceptable for a non-type template parameter.
2276 T = SemaRef.CheckNonTypeTemplateParameterType(DI, D->getLocation());
2277 if (T.isNull()) {
2278 T = SemaRef.Context.IntTy;
2279 Invalid = true;
2280 }
2281 }
2282
2283 NonTypeTemplateParmDecl *Param;
2284 if (IsExpandedParameterPack)
2285 Param = NonTypeTemplateParmDecl::Create(
2286 SemaRef.Context, Owner, D->getInnerLocStart(), D->getLocation(),
2287 D->getDepth() - TemplateArgs.getNumSubstitutedLevels(),
2288 D->getPosition(), D->getIdentifier(), T, DI, ExpandedParameterPackTypes,
2289 ExpandedParameterPackTypesAsWritten);
2290 else
2291 Param = NonTypeTemplateParmDecl::Create(
2292 SemaRef.Context, Owner, D->getInnerLocStart(), D->getLocation(),
2293 D->getDepth() - TemplateArgs.getNumSubstitutedLevels(),
2294 D->getPosition(), D->getIdentifier(), T, D->isParameterPack(), DI);
2295
2296 Param->setAccess(AS_public);
2297 if (Invalid)
2298 Param->setInvalidDecl();
2299
2300 if (D->hasDefaultArgument() && !D->defaultArgumentWasInherited()) {
2301 EnterExpressionEvaluationContext ConstantEvaluated(
2302 SemaRef, Sema::ExpressionEvaluationContext::ConstantEvaluated);
2303 ExprResult Value = SemaRef.SubstExpr(D->getDefaultArgument(), TemplateArgs);
2304 if (!Value.isInvalid())
2305 Param->setDefaultArgument(Value.get());
2306 }
2307
2308 // Introduce this template parameter's instantiation into the instantiation
2309 // scope.
2310 SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Param);
2311 return Param;
2312}
2313
2314static void collectUnexpandedParameterPacks(
2315 Sema &S,
2316 TemplateParameterList *Params,
2317 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded) {
2318 for (const auto &P : *Params) {
2319 if (P->isTemplateParameterPack())
2320 continue;
2321 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(P))
2322 S.collectUnexpandedParameterPacks(NTTP->getTypeSourceInfo()->getTypeLoc(),
2323 Unexpanded);
2324 if (TemplateTemplateParmDecl *TTP = dyn_cast<TemplateTemplateParmDecl>(P))
2325 collectUnexpandedParameterPacks(S, TTP->getTemplateParameters(),
2326 Unexpanded);
2327 }
2328}
2329
2330Decl *
2331TemplateDeclInstantiator::VisitTemplateTemplateParmDecl(
2332 TemplateTemplateParmDecl *D) {
2333 // Instantiate the template parameter list of the template template parameter.
2334 TemplateParameterList *TempParams = D->getTemplateParameters();
2335 TemplateParameterList *InstParams;
2336 SmallVector<TemplateParameterList*, 8> ExpandedParams;
2337
2338 bool IsExpandedParameterPack = false;
2339
2340 if (D->isExpandedParameterPack()) {
2341 // The template template parameter pack is an already-expanded pack
2342 // expansion of template parameters. Substitute into each of the expanded
2343 // parameters.
2344 ExpandedParams.reserve(D->getNumExpansionTemplateParameters());
2345 for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2346 I != N; ++I) {
2347 LocalInstantiationScope Scope(SemaRef);
2348 TemplateParameterList *Expansion =
2349 SubstTemplateParams(D->getExpansionTemplateParameters(I));
2350 if (!Expansion)
2351 return nullptr;
2352 ExpandedParams.push_back(Expansion);
2353 }
2354
2355 IsExpandedParameterPack = true;
2356 InstParams = TempParams;
2357 } else if (D->isPackExpansion()) {
2358 // The template template parameter pack expands to a pack of template
2359 // template parameters. Determine whether we need to expand this parameter
2360 // pack into separate parameters.
2361 SmallVector<UnexpandedParameterPack, 2> Unexpanded;
2362 collectUnexpandedParameterPacks(SemaRef, D->getTemplateParameters(),
2363 Unexpanded);
2364
2365 // Determine whether the set of unexpanded parameter packs can and should
2366 // be expanded.
2367 bool Expand = true;
2368 bool RetainExpansion = false;
2369 Optional<unsigned> NumExpansions;
2370 if (SemaRef.CheckParameterPacksForExpansion(D->getLocation(),
2371 TempParams->getSourceRange(),
2372 Unexpanded,
2373 TemplateArgs,
2374 Expand, RetainExpansion,
2375 NumExpansions))
2376 return nullptr;
2377
2378 if (Expand) {
2379 for (unsigned I = 0; I != *NumExpansions; ++I) {
2380 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, I);
2381 LocalInstantiationScope Scope(SemaRef);
2382 TemplateParameterList *Expansion = SubstTemplateParams(TempParams);
2383 if (!Expansion)
2384 return nullptr;
2385 ExpandedParams.push_back(Expansion);
2386 }
2387
2388 // Note that we have an expanded parameter pack. The "type" of this
2389 // expanded parameter pack is the original expansion type, but callers
2390 // will end up using the expanded parameter pack types for type-checking.
2391 IsExpandedParameterPack = true;
2392 InstParams = TempParams;
2393 } else {
2394 // We cannot fully expand the pack expansion now, so just substitute
2395 // into the pattern.
2396 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, -1);
2397
2398 LocalInstantiationScope Scope(SemaRef);
2399 InstParams = SubstTemplateParams(TempParams);
2400 if (!InstParams)
2401 return nullptr;
2402 }
2403 } else {
2404 // Perform the actual substitution of template parameters within a new,
2405 // local instantiation scope.
2406 LocalInstantiationScope Scope(SemaRef);
2407 InstParams = SubstTemplateParams(TempParams);
2408 if (!InstParams)
2409 return nullptr;
2410 }
2411
2412 // Build the template template parameter.
2413 TemplateTemplateParmDecl *Param;
2414 if (IsExpandedParameterPack)
2415 Param = TemplateTemplateParmDecl::Create(
2416 SemaRef.Context, Owner, D->getLocation(),
2417 D->getDepth() - TemplateArgs.getNumSubstitutedLevels(),
2418 D->getPosition(), D->getIdentifier(), InstParams, ExpandedParams);
2419 else
2420 Param = TemplateTemplateParmDecl::Create(
2421 SemaRef.Context, Owner, D->getLocation(),
2422 D->getDepth() - TemplateArgs.getNumSubstitutedLevels(),
2423 D->getPosition(), D->isParameterPack(), D->getIdentifier(), InstParams);
2424 if (D->hasDefaultArgument() && !D->defaultArgumentWasInherited()) {
2425 NestedNameSpecifierLoc QualifierLoc =
2426 D->getDefaultArgument().getTemplateQualifierLoc();
2427 QualifierLoc =
2428 SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc, TemplateArgs);
2429 TemplateName TName = SemaRef.SubstTemplateName(
2430 QualifierLoc, D->getDefaultArgument().getArgument().getAsTemplate(),
2431 D->getDefaultArgument().getTemplateNameLoc(), TemplateArgs);
2432 if (!TName.isNull())
2433 Param->setDefaultArgument(
2434 SemaRef.Context,
2435 TemplateArgumentLoc(TemplateArgument(TName),
2436 D->getDefaultArgument().getTemplateQualifierLoc(),
2437 D->getDefaultArgument().getTemplateNameLoc()));
2438 }
2439 Param->setAccess(AS_public);
2440
2441 // Introduce this template parameter's instantiation into the instantiation
2442 // scope.
2443 SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Param);
2444
2445 return Param;
2446}
2447
2448Decl *TemplateDeclInstantiator::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
2449 // Using directives are never dependent (and never contain any types or
2450 // expressions), so they require no explicit instantiation work.
2451
2452 UsingDirectiveDecl *Inst
2453 = UsingDirectiveDecl::Create(SemaRef.Context, Owner, D->getLocation(),
2454 D->getNamespaceKeyLocation(),
2455 D->getQualifierLoc(),
2456 D->getIdentLocation(),
2457 D->getNominatedNamespace(),
2458 D->getCommonAncestor());
2459
2460 // Add the using directive to its declaration context
2461 // only if this is not a function or method.
2462 if (!Owner->isFunctionOrMethod())
2463 Owner->addDecl(Inst);
2464
2465 return Inst;
2466}
2467
2468Decl *TemplateDeclInstantiator::VisitUsingDecl(UsingDecl *D) {
2469
2470 // The nested name specifier may be dependent, for example
2471 // template <typename T> struct t {
2472 // struct s1 { T f1(); };
2473 // struct s2 : s1 { using s1::f1; };
2474 // };
2475 // template struct t<int>;
2476 // Here, in using s1::f1, s1 refers to t<T>::s1;
2477 // we need to substitute for t<int>::s1.
2478 NestedNameSpecifierLoc QualifierLoc
2479 = SemaRef.SubstNestedNameSpecifierLoc(D->getQualifierLoc(),
2480 TemplateArgs);
2481 if (!QualifierLoc)
2482 return nullptr;
2483
2484 // For an inheriting constructor declaration, the name of the using
2485 // declaration is the name of a constructor in this class, not in the
2486 // base class.
2487 DeclarationNameInfo NameInfo = D->getNameInfo();
2488 if (NameInfo.getName().getNameKind() == DeclarationName::CXXConstructorName)
2489 if (auto *RD = dyn_cast<CXXRecordDecl>(SemaRef.CurContext))
2490 NameInfo.setName(SemaRef.Context.DeclarationNames.getCXXConstructorName(
2491 SemaRef.Context.getCanonicalType(SemaRef.Context.getRecordType(RD))));
2492
2493 // We only need to do redeclaration lookups if we're in a class
2494 // scope (in fact, it's not really even possible in non-class
2495 // scopes).
2496 bool CheckRedeclaration = Owner->isRecord();
2497
2498 LookupResult Prev(SemaRef, NameInfo, Sema::LookupUsingDeclName,
2499 Sema::ForVisibleRedeclaration);
2500
2501 UsingDecl *NewUD = UsingDecl::Create(SemaRef.Context, Owner,
2502 D->getUsingLoc(),
2503 QualifierLoc,
2504 NameInfo,
2505 D->hasTypename());
2506
2507 CXXScopeSpec SS;
2508 SS.Adopt(QualifierLoc);
2509 if (CheckRedeclaration) {
2510 Prev.setHideTags(false);
2511 SemaRef.LookupQualifiedName(Prev, Owner);
2512
2513 // Check for invalid redeclarations.
2514 if (SemaRef.CheckUsingDeclRedeclaration(D->getUsingLoc(),
2515 D->hasTypename(), SS,
2516 D->getLocation(), Prev))
2517 NewUD->setInvalidDecl();
2518
2519 }
2520
2521 if (!NewUD->isInvalidDecl() &&
2522 SemaRef.CheckUsingDeclQualifier(D->getUsingLoc(), D->hasTypename(),
2523 SS, NameInfo, D->getLocation()))
2524 NewUD->setInvalidDecl();
2525
2526 SemaRef.Context.setInstantiatedFromUsingDecl(NewUD, D);
2527 NewUD->setAccess(D->getAccess());
2528 Owner->addDecl(NewUD);
2529
2530 // Don't process the shadow decls for an invalid decl.
2531 if (NewUD->isInvalidDecl())
2532 return NewUD;
2533
2534 if (NameInfo.getName().getNameKind() == DeclarationName::CXXConstructorName)
2535 SemaRef.CheckInheritingConstructorUsingDecl(NewUD);
2536
2537 bool isFunctionScope = Owner->isFunctionOrMethod();
2538
2539 // Process the shadow decls.
2540 for (auto *Shadow : D->shadows()) {
2541 // FIXME: UsingShadowDecl doesn't preserve its immediate target, so
2542 // reconstruct it in the case where it matters.
2543 NamedDecl *OldTarget = Shadow->getTargetDecl();
2544 if (auto *CUSD = dyn_cast<ConstructorUsingShadowDecl>(Shadow))
2545 if (auto *BaseShadow = CUSD->getNominatedBaseClassShadowDecl())
2546 OldTarget = BaseShadow;
2547
2548 NamedDecl *InstTarget =
2549 cast_or_null<NamedDecl>(SemaRef.FindInstantiatedDecl(
2550 Shadow->getLocation(), OldTarget, TemplateArgs));
2551 if (!InstTarget)
2552 return nullptr;
2553
2554 UsingShadowDecl *PrevDecl = nullptr;
2555 if (CheckRedeclaration) {
2556 if (SemaRef.CheckUsingShadowDecl(NewUD, InstTarget, Prev, PrevDecl))
2557 continue;
2558 } else if (UsingShadowDecl *OldPrev =
2559 getPreviousDeclForInstantiation(Shadow)) {
2560 PrevDecl = cast_or_null<UsingShadowDecl>(SemaRef.FindInstantiatedDecl(
2561 Shadow->getLocation(), OldPrev, TemplateArgs));
2562 }
2563
2564 UsingShadowDecl *InstShadow =
2565 SemaRef.BuildUsingShadowDecl(/*Scope*/nullptr, NewUD, InstTarget,
2566 PrevDecl);
2567 SemaRef.Context.setInstantiatedFromUsingShadowDecl(InstShadow, Shadow);
2568
2569 if (isFunctionScope)
2570 SemaRef.CurrentInstantiationScope->InstantiatedLocal(Shadow, InstShadow);
2571 }
2572
2573 return NewUD;
2574}
2575
2576Decl *TemplateDeclInstantiator::VisitUsingShadowDecl(UsingShadowDecl *D) {
2577 // Ignore these; we handle them in bulk when processing the UsingDecl.
2578 return nullptr;
2579}
2580
2581Decl *TemplateDeclInstantiator::VisitConstructorUsingShadowDecl(
2582 ConstructorUsingShadowDecl *D) {
2583 // Ignore these; we handle them in bulk when processing the UsingDecl.
2584 return nullptr;
2585}
2586
2587template <typename T>
2588Decl *TemplateDeclInstantiator::instantiateUnresolvedUsingDecl(
2589 T *D, bool InstantiatingPackElement) {
2590 // If this is a pack expansion, expand it now.
2591 if (D->isPackExpansion() && !InstantiatingPackElement) {
2592 SmallVector<UnexpandedParameterPack, 2> Unexpanded;
2593 SemaRef.collectUnexpandedParameterPacks(D->getQualifierLoc(), Unexpanded);
2594 SemaRef.collectUnexpandedParameterPacks(D->getNameInfo(), Unexpanded);
2595
2596 // Determine whether the set of unexpanded parameter packs can and should
2597 // be expanded.
2598 bool Expand = true;
2599 bool RetainExpansion = false;
2600 Optional<unsigned> NumExpansions;
2601 if (SemaRef.CheckParameterPacksForExpansion(
2602 D->getEllipsisLoc(), D->getSourceRange(), Unexpanded, TemplateArgs,
2603 Expand, RetainExpansion, NumExpansions))
2604 return nullptr;
2605
2606 // This declaration cannot appear within a function template signature,
2607 // so we can't have a partial argument list for a parameter pack.
2608 assert(!RetainExpansion &&(static_cast <bool> (!RetainExpansion && "should never need to retain an expansion for UsingPackDecl"
) ? void (0) : __assert_fail ("!RetainExpansion && \"should never need to retain an expansion for UsingPackDecl\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2609, __extension__ __PRETTY_FUNCTION__))
2609 "should never need to retain an expansion for UsingPackDecl")(static_cast <bool> (!RetainExpansion && "should never need to retain an expansion for UsingPackDecl"
) ? void (0) : __assert_fail ("!RetainExpansion && \"should never need to retain an expansion for UsingPackDecl\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2609, __extension__ __PRETTY_FUNCTION__));
2610
2611 if (!Expand) {
2612 // We cannot fully expand the pack expansion now, so substitute into the
2613 // pattern and create a new pack expansion.
2614 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, -1);
2615 return instantiateUnresolvedUsingDecl(D, true);
2616 }
2617
2618 // Within a function, we don't have any normal way to check for conflicts
2619 // between shadow declarations from different using declarations in the
2620 // same pack expansion, but this is always ill-formed because all expansions
2621 // must produce (conflicting) enumerators.
2622 //
2623 // Sadly we can't just reject this in the template definition because it
2624 // could be valid if the pack is empty or has exactly one expansion.
2625 if (D->getDeclContext()->isFunctionOrMethod() && *NumExpansions > 1) {
2626 SemaRef.Diag(D->getEllipsisLoc(),
2627 diag::err_using_decl_redeclaration_expansion);
2628 return nullptr;
2629 }
2630
2631 // Instantiate the slices of this pack and build a UsingPackDecl.
2632 SmallVector<NamedDecl*, 8> Expansions;
2633 for (unsigned I = 0; I != *NumExpansions; ++I) {
2634 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, I);
2635 Decl *Slice = instantiateUnresolvedUsingDecl(D, true);
2636 if (!Slice)
2637 return nullptr;
2638 // Note that we can still get unresolved using declarations here, if we
2639 // had arguments for all packs but the pattern also contained other
2640 // template arguments (this only happens during partial substitution, eg
2641 // into the body of a generic lambda in a function template).
2642 Expansions.push_back(cast<NamedDecl>(Slice));
2643 }
2644
2645 auto *NewD = SemaRef.BuildUsingPackDecl(D, Expansions);
2646 if (isDeclWithinFunction(D))
2647 SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, NewD);
2648 return NewD;
2649 }
2650
2651 UnresolvedUsingTypenameDecl *TD = dyn_cast<UnresolvedUsingTypenameDecl>(D);
2652 SourceLocation TypenameLoc = TD ? TD->getTypenameLoc() : SourceLocation();
2653
2654 NestedNameSpecifierLoc QualifierLoc
2655 = SemaRef.SubstNestedNameSpecifierLoc(D->getQualifierLoc(),
2656 TemplateArgs);
2657 if (!QualifierLoc)
2658 return nullptr;
2659
2660 CXXScopeSpec SS;
2661 SS.Adopt(QualifierLoc);
2662
2663 DeclarationNameInfo NameInfo
2664 = SemaRef.SubstDeclarationNameInfo(D->getNameInfo(), TemplateArgs);
2665
2666 // Produce a pack expansion only if we're not instantiating a particular
2667 // slice of a pack expansion.
2668 bool InstantiatingSlice = D->getEllipsisLoc().isValid() &&
2669 SemaRef.ArgumentPackSubstitutionIndex != -1;
2670 SourceLocation EllipsisLoc =
2671 InstantiatingSlice ? SourceLocation() : D->getEllipsisLoc();
2672
2673 NamedDecl *UD = SemaRef.BuildUsingDeclaration(
2674 /*Scope*/ nullptr, D->getAccess(), D->getUsingLoc(),
2675 /*HasTypename*/ TD, TypenameLoc, SS, NameInfo, EllipsisLoc, nullptr,
2676 /*IsInstantiation*/ true);
2677 if (UD)
2678 SemaRef.Context.setInstantiatedFromUsingDecl(UD, D);
2679
2680 return UD;
2681}
2682
2683Decl *TemplateDeclInstantiator::VisitUnresolvedUsingTypenameDecl(
2684 UnresolvedUsingTypenameDecl *D) {
2685 return instantiateUnresolvedUsingDecl(D);
2686}
2687
2688Decl *TemplateDeclInstantiator::VisitUnresolvedUsingValueDecl(
2689 UnresolvedUsingValueDecl *D) {
2690 return instantiateUnresolvedUsingDecl(D);
2691}
2692
2693Decl *TemplateDeclInstantiator::VisitUsingPackDecl(UsingPackDecl *D) {
2694 SmallVector<NamedDecl*, 8> Expansions;
2695 for (auto *UD : D->expansions()) {
2696 if (auto *NewUD =
2697 SemaRef.FindInstantiatedDecl(D->getLocation(), UD, TemplateArgs))
2698 Expansions.push_back(cast<NamedDecl>(NewUD));
2699 else
2700 return nullptr;
2701 }
2702
2703 auto *NewD = SemaRef.BuildUsingPackDecl(D, Expansions);
2704 if (isDeclWithinFunction(D))
2705 SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, NewD);
2706 return NewD;
2707}
2708
2709Decl *TemplateDeclInstantiator::VisitClassScopeFunctionSpecializationDecl(
2710 ClassScopeFunctionSpecializationDecl *Decl) {
2711 CXXMethodDecl *OldFD = Decl->getSpecialization();
2712 CXXMethodDecl *NewFD =
2713 cast_or_null<CXXMethodDecl>(VisitCXXMethodDecl(OldFD, nullptr, true));
2714 if (!NewFD)
2715 return nullptr;
2716
2717 LookupResult Previous(SemaRef, NewFD->getNameInfo(), Sema::LookupOrdinaryName,
2718 Sema::ForExternalRedeclaration);
2719
2720 TemplateArgumentListInfo TemplateArgs;
2721 TemplateArgumentListInfo *TemplateArgsPtr = nullptr;
2722 if (Decl->hasExplicitTemplateArgs()) {
2723 TemplateArgs = Decl->templateArgs();
2724 TemplateArgsPtr = &TemplateArgs;
2725 }
2726
2727 SemaRef.LookupQualifiedName(Previous, SemaRef.CurContext);
2728 if (SemaRef.CheckFunctionTemplateSpecialization(NewFD, TemplateArgsPtr,
2729 Previous)) {
2730 NewFD->setInvalidDecl();
2731 return NewFD;
2732 }
2733
2734 // Associate the specialization with the pattern.
2735 FunctionDecl *Specialization = cast<FunctionDecl>(Previous.getFoundDecl());
2736 assert(Specialization && "Class scope Specialization is null")(static_cast <bool> (Specialization && "Class scope Specialization is null"
) ? void (0) : __assert_fail ("Specialization && \"Class scope Specialization is null\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2736, __extension__ __PRETTY_FUNCTION__));
2737 SemaRef.Context.setClassScopeSpecializationPattern(Specialization, OldFD);
2738
2739 return NewFD;
2740}
2741
2742Decl *TemplateDeclInstantiator::VisitOMPThreadPrivateDecl(
2743 OMPThreadPrivateDecl *D) {
2744 SmallVector<Expr *, 5> Vars;
2745 for (auto *I : D->varlists()) {
2746 Expr *Var = SemaRef.SubstExpr(I, TemplateArgs).get();
2747 assert(isa<DeclRefExpr>(Var) && "threadprivate arg is not a DeclRefExpr")(static_cast <bool> (isa<DeclRefExpr>(Var) &&
"threadprivate arg is not a DeclRefExpr") ? void (0) : __assert_fail
("isa<DeclRefExpr>(Var) && \"threadprivate arg is not a DeclRefExpr\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2747, __extension__ __PRETTY_FUNCTION__));
2748 Vars.push_back(Var);
2749 }
2750
2751 OMPThreadPrivateDecl *TD =
2752 SemaRef.CheckOMPThreadPrivateDecl(D->getLocation(), Vars);
2753
2754 TD->setAccess(AS_public);
2755 Owner->addDecl(TD);
2756
2757 return TD;
2758}
2759
2760Decl *TemplateDeclInstantiator::VisitOMPDeclareReductionDecl(
2761 OMPDeclareReductionDecl *D) {
2762 // Instantiate type and check if it is allowed.
2763 QualType SubstReductionType = SemaRef.ActOnOpenMPDeclareReductionType(
2764 D->getLocation(),
2765 ParsedType::make(SemaRef.SubstType(D->getType(), TemplateArgs,
2766 D->getLocation(), DeclarationName())));
2767 if (SubstReductionType.isNull())
2768 return nullptr;
2769 bool IsCorrect = !SubstReductionType.isNull();
2770 // Create instantiated copy.
2771 std::pair<QualType, SourceLocation> ReductionTypes[] = {
2772 std::make_pair(SubstReductionType, D->getLocation())};
2773 auto *PrevDeclInScope = D->getPrevDeclInScope();
2774 if (PrevDeclInScope && !PrevDeclInScope->isInvalidDecl()) {
2775 PrevDeclInScope = cast<OMPDeclareReductionDecl>(
2776 SemaRef.CurrentInstantiationScope->findInstantiationOf(PrevDeclInScope)
2777 ->get<Decl *>());
2778 }
2779 auto DRD = SemaRef.ActOnOpenMPDeclareReductionDirectiveStart(
2780 /*S=*/nullptr, Owner, D->getDeclName(), ReductionTypes, D->getAccess(),
2781 PrevDeclInScope);
2782 auto *NewDRD = cast<OMPDeclareReductionDecl>(DRD.get().getSingleDecl());
2783 if (isDeclWithinFunction(NewDRD))
2784 SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, NewDRD);
2785 Expr *SubstCombiner = nullptr;
2786 Expr *SubstInitializer = nullptr;
2787 // Combiners instantiation sequence.
2788 if (D->getCombiner()) {
2789 SemaRef.ActOnOpenMPDeclareReductionCombinerStart(
2790 /*S=*/nullptr, NewDRD);
2791 const char *Names[] = {"omp_in", "omp_out"};
2792 for (auto &Name : Names) {
2793 DeclarationName DN(&SemaRef.Context.Idents.get(Name));
2794 auto OldLookup = D->lookup(DN);
2795 auto Lookup = NewDRD->lookup(DN);
2796 if (!OldLookup.empty() && !Lookup.empty()) {
2797 assert(Lookup.size() == 1 && OldLookup.size() == 1)(static_cast <bool> (Lookup.size() == 1 && OldLookup
.size() == 1) ? void (0) : __assert_fail ("Lookup.size() == 1 && OldLookup.size() == 1"
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2797, __extension__ __PRETTY_FUNCTION__));
2798 SemaRef.CurrentInstantiationScope->InstantiatedLocal(OldLookup.front(),
2799 Lookup.front());
2800 }
2801 }
2802 SubstCombiner = SemaRef.SubstExpr(D->getCombiner(), TemplateArgs).get();
2803 SemaRef.ActOnOpenMPDeclareReductionCombinerEnd(NewDRD, SubstCombiner);
2804 // Initializers instantiation sequence.
2805 if (D->getInitializer()) {
2806 VarDecl *OmpPrivParm =
2807 SemaRef.ActOnOpenMPDeclareReductionInitializerStart(
2808 /*S=*/nullptr, NewDRD);
2809 const char *Names[] = {"omp_orig", "omp_priv"};
2810 for (auto &Name : Names) {
2811 DeclarationName DN(&SemaRef.Context.Idents.get(Name));
2812 auto OldLookup = D->lookup(DN);
2813 auto Lookup = NewDRD->lookup(DN);
2814 if (!OldLookup.empty() && !Lookup.empty()) {
2815 assert(Lookup.size() == 1 && OldLookup.size() == 1)(static_cast <bool> (Lookup.size() == 1 && OldLookup
.size() == 1) ? void (0) : __assert_fail ("Lookup.size() == 1 && OldLookup.size() == 1"
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2815, __extension__ __PRETTY_FUNCTION__));
2816 auto *OldVD = cast<VarDecl>(OldLookup.front());
2817 auto *NewVD = cast<VarDecl>(Lookup.front());
2818 SemaRef.InstantiateVariableInitializer(NewVD, OldVD, TemplateArgs);
2819 SemaRef.CurrentInstantiationScope->InstantiatedLocal(OldVD, NewVD);
2820 }
2821 }
2822 if (D->getInitializerKind() == OMPDeclareReductionDecl::CallInit) {
2823 SubstInitializer =
2824 SemaRef.SubstExpr(D->getInitializer(), TemplateArgs).get();
2825 } else {
2826 IsCorrect = IsCorrect && OmpPrivParm->hasInit();
2827 }
2828 SemaRef.ActOnOpenMPDeclareReductionInitializerEnd(
2829 NewDRD, SubstInitializer, OmpPrivParm);
2830 }
2831 IsCorrect =
2832 IsCorrect && SubstCombiner &&
2833 (!D->getInitializer() ||
2834 (D->getInitializerKind() == OMPDeclareReductionDecl::CallInit &&
2835 SubstInitializer) ||
2836 (D->getInitializerKind() != OMPDeclareReductionDecl::CallInit &&
2837 !SubstInitializer && !SubstInitializer));
2838 } else
2839 IsCorrect = false;
2840
2841 (void)SemaRef.ActOnOpenMPDeclareReductionDirectiveEnd(/*S=*/nullptr, DRD,
2842 IsCorrect);
2843
2844 return NewDRD;
2845}
2846
2847Decl *TemplateDeclInstantiator::VisitOMPCapturedExprDecl(
2848 OMPCapturedExprDecl * /*D*/) {
2849 llvm_unreachable("Should not be met in templates")::llvm::llvm_unreachable_internal("Should not be met in templates"
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2849);
2850}
2851
2852Decl *TemplateDeclInstantiator::VisitFunctionDecl(FunctionDecl *D) {
2853 return VisitFunctionDecl(D, nullptr);
2854}
2855
2856Decl *
2857TemplateDeclInstantiator::VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) {
2858 return VisitFunctionDecl(D, nullptr);
2859}
2860
2861Decl *TemplateDeclInstantiator::VisitCXXMethodDecl(CXXMethodDecl *D) {
2862 return VisitCXXMethodDecl(D, nullptr);
2863}
2864
2865Decl *TemplateDeclInstantiator::VisitRecordDecl(RecordDecl *D) {
2866 llvm_unreachable("There are only CXXRecordDecls in C++")::llvm::llvm_unreachable_internal("There are only CXXRecordDecls in C++"
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2866);
2867}
2868
2869Decl *
2870TemplateDeclInstantiator::VisitClassTemplateSpecializationDecl(
2871 ClassTemplateSpecializationDecl *D) {
2872 // As a MS extension, we permit class-scope explicit specialization
2873 // of member class templates.
2874 ClassTemplateDecl *ClassTemplate = D->getSpecializedTemplate();
2875 assert(ClassTemplate->getDeclContext()->isRecord() &&(static_cast <bool> (ClassTemplate->getDeclContext()
->isRecord() && D->getTemplateSpecializationKind
() == TSK_ExplicitSpecialization && "can only instantiate an explicit specialization "
"for a member class template") ? void (0) : __assert_fail ("ClassTemplate->getDeclContext()->isRecord() && D->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && \"can only instantiate an explicit specialization \" \"for a member class template\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2878, __extension__ __PRETTY_FUNCTION__))
2876 D->getTemplateSpecializationKind() == TSK_ExplicitSpecialization &&(static_cast <bool> (ClassTemplate->getDeclContext()
->isRecord() && D->getTemplateSpecializationKind
() == TSK_ExplicitSpecialization && "can only instantiate an explicit specialization "
"for a member class template") ? void (0) : __assert_fail ("ClassTemplate->getDeclContext()->isRecord() && D->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && \"can only instantiate an explicit specialization \" \"for a member class template\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2878, __extension__ __PRETTY_FUNCTION__))
2877 "can only instantiate an explicit specialization "(static_cast <bool> (ClassTemplate->getDeclContext()
->isRecord() && D->getTemplateSpecializationKind
() == TSK_ExplicitSpecialization && "can only instantiate an explicit specialization "
"for a member class template") ? void (0) : __assert_fail ("ClassTemplate->getDeclContext()->isRecord() && D->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && \"can only instantiate an explicit specialization \" \"for a member class template\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2878, __extension__ __PRETTY_FUNCTION__))
2878 "for a member class template")(static_cast <bool> (ClassTemplate->getDeclContext()
->isRecord() && D->getTemplateSpecializationKind
() == TSK_ExplicitSpecialization && "can only instantiate an explicit specialization "
"for a member class template") ? void (0) : __assert_fail ("ClassTemplate->getDeclContext()->isRecord() && D->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && \"can only instantiate an explicit specialization \" \"for a member class template\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 2878, __extension__ __PRETTY_FUNCTION__));
2879
2880 // Lookup the already-instantiated declaration in the instantiation
2881 // of the class template. FIXME: Diagnose or assert if this fails?
2882 DeclContext::lookup_result Found
2883 = Owner->lookup(ClassTemplate->getDeclName());
2884 if (Found.empty())
2885 return nullptr;
2886 ClassTemplateDecl *InstClassTemplate
2887 = dyn_cast<ClassTemplateDecl>(Found.front());
2888 if (!InstClassTemplate)
2889 return nullptr;
2890
2891 // Substitute into the template arguments of the class template explicit
2892 // specialization.
2893 TemplateSpecializationTypeLoc Loc = D->getTypeAsWritten()->getTypeLoc().
2894 castAs<TemplateSpecializationTypeLoc>();
2895 TemplateArgumentListInfo InstTemplateArgs(Loc.getLAngleLoc(),
2896 Loc.getRAngleLoc());
2897 SmallVector<TemplateArgumentLoc, 4> ArgLocs;
2898 for (unsigned I = 0; I != Loc.getNumArgs(); ++I)
2899 ArgLocs.push_back(Loc.getArgLoc(I));
2900 if (SemaRef.Subst(ArgLocs.data(), ArgLocs.size(),
2901 InstTemplateArgs, TemplateArgs))
2902 return nullptr;
2903
2904 // Check that the template argument list is well-formed for this
2905 // class template.
2906 SmallVector<TemplateArgument, 4> Converted;
2907 if (SemaRef.CheckTemplateArgumentList(InstClassTemplate,
2908 D->getLocation(),
2909 InstTemplateArgs,
2910 false,
2911 Converted))
2912 return nullptr;
2913
2914 // Figure out where to insert this class template explicit specialization
2915 // in the member template's set of class template explicit specializations.
2916 void *InsertPos = nullptr;
2917 ClassTemplateSpecializationDecl *PrevDecl =
2918 InstClassTemplate->findSpecialization(Converted, InsertPos);
2919
2920 // Check whether we've already seen a conflicting instantiation of this
2921 // declaration (for instance, if there was a prior implicit instantiation).
2922 bool Ignored;
2923 if (PrevDecl &&
2924 SemaRef.CheckSpecializationInstantiationRedecl(D->getLocation(),
2925 D->getSpecializationKind(),
2926 PrevDecl,
2927 PrevDecl->getSpecializationKind(),
2928 PrevDecl->getPointOfInstantiation(),
2929 Ignored))
2930 return nullptr;
2931
2932 // If PrevDecl was a definition and D is also a definition, diagnose.
2933 // This happens in cases like:
2934 //
2935 // template<typename T, typename U>
2936 // struct Outer {
2937 // template<typename X> struct Inner;
2938 // template<> struct Inner<T> {};
2939 // template<> struct Inner<U> {};
2940 // };
2941 //
2942 // Outer<int, int> outer; // error: the explicit specializations of Inner
2943 // // have the same signature.
2944 if (PrevDecl && PrevDecl->getDefinition() &&
2945 D->isThisDeclarationADefinition()) {
2946 SemaRef.Diag(D->getLocation(), diag::err_redefinition) << PrevDecl;
2947 SemaRef.Diag(PrevDecl->getDefinition()->getLocation(),
2948 diag::note_previous_definition);
2949 return nullptr;
2950 }
2951
2952 // Create the class template partial specialization declaration.
2953 ClassTemplateSpecializationDecl *InstD
2954 = ClassTemplateSpecializationDecl::Create(SemaRef.Context,
2955 D->getTagKind(),
2956 Owner,
2957 D->getLocStart(),
2958 D->getLocation(),
2959 InstClassTemplate,
2960 Converted,
2961 PrevDecl);
2962
2963 // Add this partial specialization to the set of class template partial
2964 // specializations.
2965 if (!PrevDecl)
2966 InstClassTemplate->AddSpecialization(InstD, InsertPos);
2967
2968 // Substitute the nested name specifier, if any.
2969 if (SubstQualifier(D, InstD))
2970 return nullptr;
2971
2972 // Build the canonical type that describes the converted template
2973 // arguments of the class template explicit specialization.
2974 QualType CanonType = SemaRef.Context.getTemplateSpecializationType(
2975 TemplateName(InstClassTemplate), Converted,
2976 SemaRef.Context.getRecordType(InstD));
2977
2978 // Build the fully-sugared type for this class template
2979 // specialization as the user wrote in the specialization
2980 // itself. This means that we'll pretty-print the type retrieved
2981 // from the specialization's declaration the way that the user
2982 // actually wrote the specialization, rather than formatting the
2983 // name based on the "canonical" representation used to store the
2984 // template arguments in the specialization.
2985 TypeSourceInfo *WrittenTy = SemaRef.Context.getTemplateSpecializationTypeInfo(
2986 TemplateName(InstClassTemplate), D->getLocation(), InstTemplateArgs,
2987 CanonType);
2988
2989 InstD->setAccess(D->getAccess());
2990 InstD->setInstantiationOfMemberClass(D, TSK_ImplicitInstantiation);
2991 InstD->setSpecializationKind(D->getSpecializationKind());
2992 InstD->setTypeAsWritten(WrittenTy);
2993 InstD->setExternLoc(D->getExternLoc());
2994 InstD->setTemplateKeywordLoc(D->getTemplateKeywordLoc());
2995
2996 Owner->addDecl(InstD);
2997
2998 // Instantiate the members of the class-scope explicit specialization eagerly.
2999 // We don't have support for lazy instantiation of an explicit specialization
3000 // yet, and MSVC eagerly instantiates in this case.
3001 if (D->isThisDeclarationADefinition() &&
3002 SemaRef.InstantiateClass(D->getLocation(), InstD, D, TemplateArgs,
3003 TSK_ImplicitInstantiation,
3004 /*Complain=*/true))
3005 return nullptr;
3006
3007 return InstD;
3008}
3009
3010Decl *TemplateDeclInstantiator::VisitVarTemplateSpecializationDecl(
3011 VarTemplateSpecializationDecl *D) {
3012
3013 TemplateArgumentListInfo VarTemplateArgsInfo;
3014 VarTemplateDecl *VarTemplate = D->getSpecializedTemplate();
3015 assert(VarTemplate &&(static_cast <bool> (VarTemplate && "A template specialization without specialized template?"
) ? void (0) : __assert_fail ("VarTemplate && \"A template specialization without specialized template?\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3016, __extension__ __PRETTY_FUNCTION__))
3016 "A template specialization without specialized template?")(static_cast <bool> (VarTemplate && "A template specialization without specialized template?"
) ? void (0) : __assert_fail ("VarTemplate && \"A template specialization without specialized template?\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3016, __extension__ __PRETTY_FUNCTION__));
3017
3018 // Substitute the current template arguments.
3019 const TemplateArgumentListInfo &TemplateArgsInfo = D->getTemplateArgsInfo();
3020 VarTemplateArgsInfo.setLAngleLoc(TemplateArgsInfo.getLAngleLoc());
3021 VarTemplateArgsInfo.setRAngleLoc(TemplateArgsInfo.getRAngleLoc());
3022
3023 if (SemaRef.Subst(TemplateArgsInfo.getArgumentArray(),
3024 TemplateArgsInfo.size(), VarTemplateArgsInfo, TemplateArgs))
3025 return nullptr;
3026
3027 // Check that the template argument list is well-formed for this template.
3028 SmallVector<TemplateArgument, 4> Converted;
3029 if (SemaRef.CheckTemplateArgumentList(
3030 VarTemplate, VarTemplate->getLocStart(),
3031 const_cast<TemplateArgumentListInfo &>(VarTemplateArgsInfo), false,
3032 Converted))
3033 return nullptr;
3034
3035 // Find the variable template specialization declaration that
3036 // corresponds to these arguments.
3037 void *InsertPos = nullptr;
3038 if (VarTemplateSpecializationDecl *VarSpec = VarTemplate->findSpecialization(
3039 Converted, InsertPos))
3040 // If we already have a variable template specialization, return it.
3041 return VarSpec;
3042
3043 return VisitVarTemplateSpecializationDecl(VarTemplate, D, InsertPos,
3044 VarTemplateArgsInfo, Converted);
3045}
3046
3047Decl *TemplateDeclInstantiator::VisitVarTemplateSpecializationDecl(
3048 VarTemplateDecl *VarTemplate, VarDecl *D, void *InsertPos,
3049 const TemplateArgumentListInfo &TemplateArgsInfo,
3050 ArrayRef<TemplateArgument> Converted) {
3051
3052 // Do substitution on the type of the declaration
3053 TypeSourceInfo *DI =
3054 SemaRef.SubstType(D->getTypeSourceInfo(), TemplateArgs,
3055 D->getTypeSpecStartLoc(), D->getDeclName());
3056 if (!DI)
3057 return nullptr;
3058
3059 if (DI->getType()->isFunctionType()) {
3060 SemaRef.Diag(D->getLocation(), diag::err_variable_instantiates_to_function)
3061 << D->isStaticDataMember() << DI->getType();
3062 return nullptr;
3063 }
3064
3065 // Build the instantiated declaration
3066 VarTemplateSpecializationDecl *Var = VarTemplateSpecializationDecl::Create(
3067 SemaRef.Context, Owner, D->getInnerLocStart(), D->getLocation(),
3068 VarTemplate, DI->getType(), DI, D->getStorageClass(), Converted);
3069 Var->setTemplateArgsInfo(TemplateArgsInfo);
3070 if (InsertPos)
3071 VarTemplate->AddSpecialization(Var, InsertPos);
3072
3073 // Substitute the nested name specifier, if any.
3074 if (SubstQualifier(D, Var))
3075 return nullptr;
3076
3077 SemaRef.BuildVariableInstantiation(Var, D, TemplateArgs, LateAttrs,
3078 Owner, StartingScope);
3079
3080 return Var;
3081}
3082
3083Decl *TemplateDeclInstantiator::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D) {
3084 llvm_unreachable("@defs is not supported in Objective-C++")::llvm::llvm_unreachable_internal("@defs is not supported in Objective-C++"
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3084);
3085}
3086
3087Decl *TemplateDeclInstantiator::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
3088 // FIXME: We need to be able to instantiate FriendTemplateDecls.
3089 unsigned DiagID = SemaRef.getDiagnostics().getCustomDiagID(
3090 DiagnosticsEngine::Error,
3091 "cannot instantiate %0 yet");
3092 SemaRef.Diag(D->getLocation(), DiagID)
3093 << D->getDeclKindName();
3094
3095 return nullptr;
3096}
3097
3098Decl *TemplateDeclInstantiator::VisitDecl(Decl *D) {
3099 llvm_unreachable("Unexpected decl")::llvm::llvm_unreachable_internal("Unexpected decl", "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3099);
3100}
3101
3102Decl *Sema::SubstDecl(Decl *D, DeclContext *Owner,
3103 const MultiLevelTemplateArgumentList &TemplateArgs) {
3104 TemplateDeclInstantiator Instantiator(*this, Owner, TemplateArgs);
3105 if (D->isInvalidDecl())
3106 return nullptr;
3107
3108 return Instantiator.Visit(D);
3109}
3110
3111/// \brief Instantiates a nested template parameter list in the current
3112/// instantiation context.
3113///
3114/// \param L The parameter list to instantiate
3115///
3116/// \returns NULL if there was an error
3117TemplateParameterList *
3118TemplateDeclInstantiator::SubstTemplateParams(TemplateParameterList *L) {
3119 // Get errors for all the parameters before bailing out.
3120 bool Invalid = false;
3121
3122 unsigned N = L->size();
3123 typedef SmallVector<NamedDecl *, 8> ParamVector;
3124 ParamVector Params;
3125 Params.reserve(N);
3126 for (auto &P : *L) {
3127 NamedDecl *D = cast_or_null<NamedDecl>(Visit(P));
3128 Params.push_back(D);
3129 Invalid = Invalid || !D || D->isInvalidDecl();
3130 }
3131
3132 // Clean up if we had an error.
3133 if (Invalid)
3134 return nullptr;
3135
3136 // Note: we substitute into associated constraints later
3137 Expr *const UninstantiatedRequiresClause = L->getRequiresClause();
3138
3139 TemplateParameterList *InstL
3140 = TemplateParameterList::Create(SemaRef.Context, L->getTemplateLoc(),
3141 L->getLAngleLoc(), Params,
3142 L->getRAngleLoc(),
3143 UninstantiatedRequiresClause);
3144 return InstL;
3145}
3146
3147/// \brief Instantiate the declaration of a class template partial
3148/// specialization.
3149///
3150/// \param ClassTemplate the (instantiated) class template that is partially
3151// specialized by the instantiation of \p PartialSpec.
3152///
3153/// \param PartialSpec the (uninstantiated) class template partial
3154/// specialization that we are instantiating.
3155///
3156/// \returns The instantiated partial specialization, if successful; otherwise,
3157/// NULL to indicate an error.
3158ClassTemplatePartialSpecializationDecl *
3159TemplateDeclInstantiator::InstantiateClassTemplatePartialSpecialization(
3160 ClassTemplateDecl *ClassTemplate,
3161 ClassTemplatePartialSpecializationDecl *PartialSpec) {
3162 // Create a local instantiation scope for this class template partial
3163 // specialization, which will contain the instantiations of the template
3164 // parameters.
3165 LocalInstantiationScope Scope(SemaRef);
3166
3167 // Substitute into the template parameters of the class template partial
3168 // specialization.
3169 TemplateParameterList *TempParams = PartialSpec->getTemplateParameters();
3170 TemplateParameterList *InstParams = SubstTemplateParams(TempParams);
3171 if (!InstParams)
3172 return nullptr;
3173
3174 // Substitute into the template arguments of the class template partial
3175 // specialization.
3176 const ASTTemplateArgumentListInfo *TemplArgInfo
3177 = PartialSpec->getTemplateArgsAsWritten();
3178 TemplateArgumentListInfo InstTemplateArgs(TemplArgInfo->LAngleLoc,
3179 TemplArgInfo->RAngleLoc);
3180 if (SemaRef.Subst(TemplArgInfo->getTemplateArgs(),
3181 TemplArgInfo->NumTemplateArgs,
3182 InstTemplateArgs, TemplateArgs))
3183 return nullptr;
3184
3185 // Check that the template argument list is well-formed for this
3186 // class template.
3187 SmallVector<TemplateArgument, 4> Converted;
3188 if (SemaRef.CheckTemplateArgumentList(ClassTemplate,
3189 PartialSpec->getLocation(),
3190 InstTemplateArgs,
3191 false,
3192 Converted))
3193 return nullptr;
3194
3195 // Check these arguments are valid for a template partial specialization.
3196 if (SemaRef.CheckTemplatePartialSpecializationArgs(
3197 PartialSpec->getLocation(), ClassTemplate, InstTemplateArgs.size(),
3198 Converted))
3199 return nullptr;
3200
3201 // Figure out where to insert this class template partial specialization
3202 // in the member template's set of class template partial specializations.
3203 void *InsertPos = nullptr;
3204 ClassTemplateSpecializationDecl *PrevDecl
3205 = ClassTemplate->findPartialSpecialization(Converted, InsertPos);
3206
3207 // Build the canonical type that describes the converted template
3208 // arguments of the class template partial specialization.
3209 QualType CanonType
3210 = SemaRef.Context.getTemplateSpecializationType(TemplateName(ClassTemplate),
3211 Converted);
3212
3213 // Build the fully-sugared type for this class template
3214 // specialization as the user wrote in the specialization
3215 // itself. This means that we'll pretty-print the type retrieved
3216 // from the specialization's declaration the way that the user
3217 // actually wrote the specialization, rather than formatting the
3218 // name based on the "canonical" representation used to store the
3219 // template arguments in the specialization.
3220 TypeSourceInfo *WrittenTy
3221 = SemaRef.Context.getTemplateSpecializationTypeInfo(
3222 TemplateName(ClassTemplate),
3223 PartialSpec->getLocation(),
3224 InstTemplateArgs,
3225 CanonType);
3226
3227 if (PrevDecl) {
3228 // We've already seen a partial specialization with the same template
3229 // parameters and template arguments. This can happen, for example, when
3230 // substituting the outer template arguments ends up causing two
3231 // class template partial specializations of a member class template
3232 // to have identical forms, e.g.,
3233 //
3234 // template<typename T, typename U>
3235 // struct Outer {
3236 // template<typename X, typename Y> struct Inner;
3237 // template<typename Y> struct Inner<T, Y>;
3238 // template<typename Y> struct Inner<U, Y>;
3239 // };
3240 //
3241 // Outer<int, int> outer; // error: the partial specializations of Inner
3242 // // have the same signature.
3243 SemaRef.Diag(PartialSpec->getLocation(), diag::err_partial_spec_redeclared)
3244 << WrittenTy->getType();
3245 SemaRef.Diag(PrevDecl->getLocation(), diag::note_prev_partial_spec_here)
3246 << SemaRef.Context.getTypeDeclType(PrevDecl);
3247 return nullptr;
3248 }
3249
3250
3251 // Create the class template partial specialization declaration.
3252 ClassTemplatePartialSpecializationDecl *InstPartialSpec
3253 = ClassTemplatePartialSpecializationDecl::Create(SemaRef.Context,
3254 PartialSpec->getTagKind(),
3255 Owner,
3256 PartialSpec->getLocStart(),
3257 PartialSpec->getLocation(),
3258 InstParams,
3259 ClassTemplate,
3260 Converted,
3261 InstTemplateArgs,
3262 CanonType,
3263 nullptr);
3264 // Substitute the nested name specifier, if any.
3265 if (SubstQualifier(PartialSpec, InstPartialSpec))
3266 return nullptr;
3267
3268 InstPartialSpec->setInstantiatedFromMember(PartialSpec);
3269 InstPartialSpec->setTypeAsWritten(WrittenTy);
3270
3271 // Check the completed partial specialization.
3272 SemaRef.CheckTemplatePartialSpecialization(InstPartialSpec);
3273
3274 // Add this partial specialization to the set of class template partial
3275 // specializations.
3276 ClassTemplate->AddPartialSpecialization(InstPartialSpec,
3277 /*InsertPos=*/nullptr);
3278 return InstPartialSpec;
3279}
3280
3281/// \brief Instantiate the declaration of a variable template partial
3282/// specialization.
3283///
3284/// \param VarTemplate the (instantiated) variable template that is partially
3285/// specialized by the instantiation of \p PartialSpec.
3286///
3287/// \param PartialSpec the (uninstantiated) variable template partial
3288/// specialization that we are instantiating.
3289///
3290/// \returns The instantiated partial specialization, if successful; otherwise,
3291/// NULL to indicate an error.
3292VarTemplatePartialSpecializationDecl *
3293TemplateDeclInstantiator::InstantiateVarTemplatePartialSpecialization(
3294 VarTemplateDecl *VarTemplate,
3295 VarTemplatePartialSpecializationDecl *PartialSpec) {
3296 // Create a local instantiation scope for this variable template partial
3297 // specialization, which will contain the instantiations of the template
3298 // parameters.
3299 LocalInstantiationScope Scope(SemaRef);
3300
3301 // Substitute into the template parameters of the variable template partial
3302 // specialization.
3303 TemplateParameterList *TempParams = PartialSpec->getTemplateParameters();
3304 TemplateParameterList *InstParams = SubstTemplateParams(TempParams);
3305 if (!InstParams)
3306 return nullptr;
3307
3308 // Substitute into the template arguments of the variable template partial
3309 // specialization.
3310 const ASTTemplateArgumentListInfo *TemplArgInfo
3311 = PartialSpec->getTemplateArgsAsWritten();
3312 TemplateArgumentListInfo InstTemplateArgs(TemplArgInfo->LAngleLoc,
3313 TemplArgInfo->RAngleLoc);
3314 if (SemaRef.Subst(TemplArgInfo->getTemplateArgs(),
3315 TemplArgInfo->NumTemplateArgs,
3316 InstTemplateArgs, TemplateArgs))
3317 return nullptr;
3318
3319 // Check that the template argument list is well-formed for this
3320 // class template.
3321 SmallVector<TemplateArgument, 4> Converted;
3322 if (SemaRef.CheckTemplateArgumentList(VarTemplate, PartialSpec->getLocation(),
3323 InstTemplateArgs, false, Converted))
3324 return nullptr;
3325
3326 // Check these arguments are valid for a template partial specialization.
3327 if (SemaRef.CheckTemplatePartialSpecializationArgs(
3328 PartialSpec->getLocation(), VarTemplate, InstTemplateArgs.size(),
3329 Converted))
3330 return nullptr;
3331
3332 // Figure out where to insert this variable template partial specialization
3333 // in the member template's set of variable template partial specializations.
3334 void *InsertPos = nullptr;
3335 VarTemplateSpecializationDecl *PrevDecl =
3336 VarTemplate->findPartialSpecialization(Converted, InsertPos);
3337
3338 // Build the canonical type that describes the converted template
3339 // arguments of the variable template partial specialization.
3340 QualType CanonType = SemaRef.Context.getTemplateSpecializationType(
3341 TemplateName(VarTemplate), Converted);
3342
3343 // Build the fully-sugared type for this variable template
3344 // specialization as the user wrote in the specialization
3345 // itself. This means that we'll pretty-print the type retrieved
3346 // from the specialization's declaration the way that the user
3347 // actually wrote the specialization, rather than formatting the
3348 // name based on the "canonical" representation used to store the
3349 // template arguments in the specialization.
3350 TypeSourceInfo *WrittenTy = SemaRef.Context.getTemplateSpecializationTypeInfo(
3351 TemplateName(VarTemplate), PartialSpec->getLocation(), InstTemplateArgs,
3352 CanonType);
3353
3354 if (PrevDecl) {
3355 // We've already seen a partial specialization with the same template
3356 // parameters and template arguments. This can happen, for example, when
3357 // substituting the outer template arguments ends up causing two
3358 // variable template partial specializations of a member variable template
3359 // to have identical forms, e.g.,
3360 //
3361 // template<typename T, typename U>
3362 // struct Outer {
3363 // template<typename X, typename Y> pair<X,Y> p;
3364 // template<typename Y> pair<T, Y> p;
3365 // template<typename Y> pair<U, Y> p;
3366 // };
3367 //
3368 // Outer<int, int> outer; // error: the partial specializations of Inner
3369 // // have the same signature.
3370 SemaRef.Diag(PartialSpec->getLocation(),
3371 diag::err_var_partial_spec_redeclared)
3372 << WrittenTy->getType();
3373 SemaRef.Diag(PrevDecl->getLocation(),
3374 diag::note_var_prev_partial_spec_here);
3375 return nullptr;
3376 }
3377
3378 // Do substitution on the type of the declaration
3379 TypeSourceInfo *DI = SemaRef.SubstType(
3380 PartialSpec->getTypeSourceInfo(), TemplateArgs,
3381 PartialSpec->getTypeSpecStartLoc(), PartialSpec->getDeclName());
3382 if (!DI)
3383 return nullptr;
3384
3385 if (DI->getType()->isFunctionType()) {
3386 SemaRef.Diag(PartialSpec->getLocation(),
3387 diag::err_variable_instantiates_to_function)
3388 << PartialSpec->isStaticDataMember() << DI->getType();
3389 return nullptr;
3390 }
3391
3392 // Create the variable template partial specialization declaration.
3393 VarTemplatePartialSpecializationDecl *InstPartialSpec =
3394 VarTemplatePartialSpecializationDecl::Create(
3395 SemaRef.Context, Owner, PartialSpec->getInnerLocStart(),
3396 PartialSpec->getLocation(), InstParams, VarTemplate, DI->getType(),
3397 DI, PartialSpec->getStorageClass(), Converted, InstTemplateArgs);
3398
3399 // Substitute the nested name specifier, if any.
3400 if (SubstQualifier(PartialSpec, InstPartialSpec))
3401 return nullptr;
3402
3403 InstPartialSpec->setInstantiatedFromMember(PartialSpec);
3404 InstPartialSpec->setTypeAsWritten(WrittenTy);
3405
3406 // Check the completed partial specialization.
3407 SemaRef.CheckTemplatePartialSpecialization(InstPartialSpec);
3408
3409 // Add this partial specialization to the set of variable template partial
3410 // specializations. The instantiation of the initializer is not necessary.
3411 VarTemplate->AddPartialSpecialization(InstPartialSpec, /*InsertPos=*/nullptr);
3412
3413 SemaRef.BuildVariableInstantiation(InstPartialSpec, PartialSpec, TemplateArgs,
3414 LateAttrs, Owner, StartingScope);
3415
3416 return InstPartialSpec;
3417}
3418
3419TypeSourceInfo*
3420TemplateDeclInstantiator::SubstFunctionType(FunctionDecl *D,
3421 SmallVectorImpl<ParmVarDecl *> &Params) {
3422 TypeSourceInfo *OldTInfo = D->getTypeSourceInfo();
3423 assert(OldTInfo && "substituting function without type source info")(static_cast <bool> (OldTInfo && "substituting function without type source info"
) ? void (0) : __assert_fail ("OldTInfo && \"substituting function without type source info\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3423, __extension__ __PRETTY_FUNCTION__));
3424 assert(Params.empty() && "parameter vector is non-empty at start")(static_cast <bool> (Params.empty() && "parameter vector is non-empty at start"
) ? void (0) : __assert_fail ("Params.empty() && \"parameter vector is non-empty at start\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3424, __extension__ __PRETTY_FUNCTION__));
3425
3426 CXXRecordDecl *ThisContext = nullptr;
3427 unsigned ThisTypeQuals = 0;
3428 if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) {
3429 ThisContext = cast<CXXRecordDecl>(Owner);
3430 ThisTypeQuals = Method->getTypeQualifiers();
3431 }
3432
3433 TypeSourceInfo *NewTInfo
3434 = SemaRef.SubstFunctionDeclType(OldTInfo, TemplateArgs,
3435 D->getTypeSpecStartLoc(),
3436 D->getDeclName(),
3437 ThisContext, ThisTypeQuals);
3438 if (!NewTInfo)
3439 return nullptr;
3440
3441 TypeLoc OldTL = OldTInfo->getTypeLoc().IgnoreParens();
3442 if (FunctionProtoTypeLoc OldProtoLoc = OldTL.getAs<FunctionProtoTypeLoc>()) {
3443 if (NewTInfo != OldTInfo) {
3444 // Get parameters from the new type info.
3445 TypeLoc NewTL = NewTInfo->getTypeLoc().IgnoreParens();
3446 FunctionProtoTypeLoc NewProtoLoc = NewTL.castAs<FunctionProtoTypeLoc>();
3447 unsigned NewIdx = 0;
3448 for (unsigned OldIdx = 0, NumOldParams = OldProtoLoc.getNumParams();
3449 OldIdx != NumOldParams; ++OldIdx) {
3450 ParmVarDecl *OldParam = OldProtoLoc.getParam(OldIdx);
3451 LocalInstantiationScope *Scope = SemaRef.CurrentInstantiationScope;
3452
3453 Optional<unsigned> NumArgumentsInExpansion;
3454 if (OldParam->isParameterPack())
3455 NumArgumentsInExpansion =
3456 SemaRef.getNumArgumentsInExpansion(OldParam->getType(),
3457 TemplateArgs);
3458 if (!NumArgumentsInExpansion) {
3459 // Simple case: normal parameter, or a parameter pack that's
3460 // instantiated to a (still-dependent) parameter pack.
3461 ParmVarDecl *NewParam = NewProtoLoc.getParam(NewIdx++);
3462 Params.push_back(NewParam);
3463 Scope->InstantiatedLocal(OldParam, NewParam);
3464 } else {
3465 // Parameter pack expansion: make the instantiation an argument pack.
3466 Scope->MakeInstantiatedLocalArgPack(OldParam);
3467 for (unsigned I = 0; I != *NumArgumentsInExpansion; ++I) {
3468 ParmVarDecl *NewParam = NewProtoLoc.getParam(NewIdx++);
3469 Params.push_back(NewParam);
3470 Scope->InstantiatedLocalPackArg(OldParam, NewParam);
3471 }
3472 }
3473 }
3474 } else {
3475 // The function type itself was not dependent and therefore no
3476 // substitution occurred. However, we still need to instantiate
3477 // the function parameters themselves.
3478 const FunctionProtoType *OldProto =
3479 cast<FunctionProtoType>(OldProtoLoc.getType());
3480 for (unsigned i = 0, i_end = OldProtoLoc.getNumParams(); i != i_end;
3481 ++i) {
3482 ParmVarDecl *OldParam = OldProtoLoc.getParam(i);
3483 if (!OldParam) {
3484 Params.push_back(SemaRef.BuildParmVarDeclForTypedef(
3485 D, D->getLocation(), OldProto->getParamType(i)));
3486 continue;
3487 }
3488
3489 ParmVarDecl *Parm =
3490 cast_or_null<ParmVarDecl>(VisitParmVarDecl(OldParam));
3491 if (!Parm)
3492 return nullptr;
3493 Params.push_back(Parm);
3494 }
3495 }
3496 } else {
3497 // If the type of this function, after ignoring parentheses, is not
3498 // *directly* a function type, then we're instantiating a function that
3499 // was declared via a typedef or with attributes, e.g.,
3500 //
3501 // typedef int functype(int, int);
3502 // functype func;
3503 // int __cdecl meth(int, int);
3504 //
3505 // In this case, we'll just go instantiate the ParmVarDecls that we
3506 // synthesized in the method declaration.
3507 SmallVector<QualType, 4> ParamTypes;
3508 Sema::ExtParameterInfoBuilder ExtParamInfos;
3509 if (SemaRef.SubstParmTypes(D->getLocation(), D->parameters(), nullptr,
3510 TemplateArgs, ParamTypes, &Params,
3511 ExtParamInfos))
3512 return nullptr;
3513 }
3514
3515 return NewTInfo;
3516}
3517
3518/// Introduce the instantiated function parameters into the local
3519/// instantiation scope, and set the parameter names to those used
3520/// in the template.
3521static bool addInstantiatedParametersToScope(Sema &S, FunctionDecl *Function,
3522 const FunctionDecl *PatternDecl,
3523 LocalInstantiationScope &Scope,
3524 const MultiLevelTemplateArgumentList &TemplateArgs) {
3525 unsigned FParamIdx = 0;
3526 for (unsigned I = 0, N = PatternDecl->getNumParams(); I != N; ++I) {
3527 const ParmVarDecl *PatternParam = PatternDecl->getParamDecl(I);
3528 if (!PatternParam->isParameterPack()) {
3529 // Simple case: not a parameter pack.
3530 assert(FParamIdx < Function->getNumParams())(static_cast <bool> (FParamIdx < Function->getNumParams
()) ? void (0) : __assert_fail ("FParamIdx < Function->getNumParams()"
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3530, __extension__ __PRETTY_FUNCTION__));
3531 ParmVarDecl *FunctionParam = Function->getParamDecl(FParamIdx);
3532 FunctionParam->setDeclName(PatternParam->getDeclName());
3533 // If the parameter's type is not dependent, update it to match the type
3534 // in the pattern. They can differ in top-level cv-qualifiers, and we want
3535 // the pattern's type here. If the type is dependent, they can't differ,
3536 // per core issue 1668. Substitute into the type from the pattern, in case
3537 // it's instantiation-dependent.
3538 // FIXME: Updating the type to work around this is at best fragile.
3539 if (!PatternDecl->getType()->isDependentType()) {
3540 QualType T = S.SubstType(PatternParam->getType(), TemplateArgs,
3541 FunctionParam->getLocation(),
3542 FunctionParam->getDeclName());
3543 if (T.isNull())
3544 return true;
3545 FunctionParam->setType(T);
3546 }
3547
3548 Scope.InstantiatedLocal(PatternParam, FunctionParam);
3549 ++FParamIdx;
3550 continue;
3551 }
3552
3553 // Expand the parameter pack.
3554 Scope.MakeInstantiatedLocalArgPack(PatternParam);
3555 Optional<unsigned> NumArgumentsInExpansion
3556 = S.getNumArgumentsInExpansion(PatternParam->getType(), TemplateArgs);
3557 assert(NumArgumentsInExpansion &&(static_cast <bool> (NumArgumentsInExpansion &&
"should only be called when all template arguments are known"
) ? void (0) : __assert_fail ("NumArgumentsInExpansion && \"should only be called when all template arguments are known\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3558, __extension__ __PRETTY_FUNCTION__))
3558 "should only be called when all template arguments are known")(static_cast <bool> (NumArgumentsInExpansion &&
"should only be called when all template arguments are known"
) ? void (0) : __assert_fail ("NumArgumentsInExpansion && \"should only be called when all template arguments are known\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3558, __extension__ __PRETTY_FUNCTION__));
3559 QualType PatternType =
3560 PatternParam->getType()->castAs<PackExpansionType>()->getPattern();
3561 for (unsigned Arg = 0; Arg < *NumArgumentsInExpansion; ++Arg) {
3562 ParmVarDecl *FunctionParam = Function->getParamDecl(FParamIdx);
3563 FunctionParam->setDeclName(PatternParam->getDeclName());
3564 if (!PatternDecl->getType()->isDependentType()) {
3565 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(S, Arg);
3566 QualType T = S.SubstType(PatternType, TemplateArgs,
3567 FunctionParam->getLocation(),
3568 FunctionParam->getDeclName());
3569 if (T.isNull())
3570 return true;
3571 FunctionParam->setType(T);
3572 }
3573
3574 Scope.InstantiatedLocalPackArg(PatternParam, FunctionParam);
3575 ++FParamIdx;
3576 }
3577 }
3578
3579 return false;
3580}
3581
3582void Sema::InstantiateExceptionSpec(SourceLocation PointOfInstantiation,
3583 FunctionDecl *Decl) {
3584 const FunctionProtoType *Proto = Decl->getType()->castAs<FunctionProtoType>();
3585 if (Proto->getExceptionSpecType() != EST_Uninstantiated)
3586 return;
3587
3588 InstantiatingTemplate Inst(*this, PointOfInstantiation, Decl,
3589 InstantiatingTemplate::ExceptionSpecification());
3590 if (Inst.isInvalid()) {
3591 // We hit the instantiation depth limit. Clear the exception specification
3592 // so that our callers don't have to cope with EST_Uninstantiated.
3593 UpdateExceptionSpec(Decl, EST_None);
3594 return;
3595 }
3596 if (Inst.isAlreadyInstantiating()) {
3597 // This exception specification indirectly depends on itself. Reject.
3598 // FIXME: Corresponding rule in the standard?
3599 Diag(PointOfInstantiation, diag::err_exception_spec_cycle) << Decl;
3600 UpdateExceptionSpec(Decl, EST_None);
3601 return;
3602 }
3603
3604 // Enter the scope of this instantiation. We don't use
3605 // PushDeclContext because we don't have a scope.
3606 Sema::ContextRAII savedContext(*this, Decl);
3607 LocalInstantiationScope Scope(*this);
3608
3609 MultiLevelTemplateArgumentList TemplateArgs =
3610 getTemplateInstantiationArgs(Decl, nullptr, /*RelativeToPrimary*/true);
3611
3612 FunctionDecl *Template = Proto->getExceptionSpecTemplate();
3613 if (addInstantiatedParametersToScope(*this, Decl, Template, Scope,
3614 TemplateArgs)) {
3615 UpdateExceptionSpec(Decl, EST_None);
3616 return;
3617 }
3618
3619 SubstExceptionSpec(Decl, Template->getType()->castAs<FunctionProtoType>(),
3620 TemplateArgs);
3621}
3622
3623/// \brief Initializes the common fields of an instantiation function
3624/// declaration (New) from the corresponding fields of its template (Tmpl).
3625///
3626/// \returns true if there was an error
3627bool
3628TemplateDeclInstantiator::InitFunctionInstantiation(FunctionDecl *New,
3629 FunctionDecl *Tmpl) {
3630 if (Tmpl->isDeleted())
3631 New->setDeletedAsWritten();
3632
3633 New->setImplicit(Tmpl->isImplicit());
3634
3635 // Forward the mangling number from the template to the instantiated decl.
3636 SemaRef.Context.setManglingNumber(New,
3637 SemaRef.Context.getManglingNumber(Tmpl));
3638
3639 // If we are performing substituting explicitly-specified template arguments
3640 // or deduced template arguments into a function template and we reach this
3641 // point, we are now past the point where SFINAE applies and have committed
3642 // to keeping the new function template specialization. We therefore
3643 // convert the active template instantiation for the function template
3644 // into a template instantiation for this specific function template
3645 // specialization, which is not a SFINAE context, so that we diagnose any
3646 // further errors in the declaration itself.
3647 typedef Sema::CodeSynthesisContext ActiveInstType;
3648 ActiveInstType &ActiveInst = SemaRef.CodeSynthesisContexts.back();
3649 if (ActiveInst.Kind == ActiveInstType::ExplicitTemplateArgumentSubstitution ||
3650 ActiveInst.Kind == ActiveInstType::DeducedTemplateArgumentSubstitution) {
3651 if (FunctionTemplateDecl *FunTmpl
3652 = dyn_cast<FunctionTemplateDecl>(ActiveInst.Entity)) {
3653 assert(FunTmpl->getTemplatedDecl() == Tmpl &&(static_cast <bool> (FunTmpl->getTemplatedDecl() == Tmpl
&& "Deduction from the wrong function template?") ? void
(0) : __assert_fail ("FunTmpl->getTemplatedDecl() == Tmpl && \"Deduction from the wrong function template?\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3654, __extension__ __PRETTY_FUNCTION__))
3654 "Deduction from the wrong function template?")(static_cast <bool> (FunTmpl->getTemplatedDecl() == Tmpl
&& "Deduction from the wrong function template?") ? void
(0) : __assert_fail ("FunTmpl->getTemplatedDecl() == Tmpl && \"Deduction from the wrong function template?\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3654, __extension__ __PRETTY_FUNCTION__));
3655 (void) FunTmpl;
3656 ActiveInst.Kind = ActiveInstType::TemplateInstantiation;
3657 ActiveInst.Entity = New;
3658 }
3659 }
3660
3661 const FunctionProtoType *Proto = Tmpl->getType()->getAs<FunctionProtoType>();
3662 assert(Proto && "Function template without prototype?")(static_cast <bool> (Proto && "Function template without prototype?"
) ? void (0) : __assert_fail ("Proto && \"Function template without prototype?\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3662, __extension__ __PRETTY_FUNCTION__));
3663
3664 if (Proto->hasExceptionSpec() || Proto->getNoReturnAttr()) {
3665 FunctionProtoType::ExtProtoInfo EPI = Proto->getExtProtoInfo();
3666
3667 // DR1330: In C++11, defer instantiation of a non-trivial
3668 // exception specification.
3669 // DR1484: Local classes and their members are instantiated along with the
3670 // containing function.
3671 if (SemaRef.getLangOpts().CPlusPlus11 &&
3672 EPI.ExceptionSpec.Type != EST_None &&
3673 EPI.ExceptionSpec.Type != EST_DynamicNone &&
3674 EPI.ExceptionSpec.Type != EST_BasicNoexcept &&
3675 !Tmpl->isLexicallyWithinFunctionOrMethod()) {
3676 FunctionDecl *ExceptionSpecTemplate = Tmpl;
3677 if (EPI.ExceptionSpec.Type == EST_Uninstantiated)
3678 ExceptionSpecTemplate = EPI.ExceptionSpec.SourceTemplate;
3679 ExceptionSpecificationType NewEST = EST_Uninstantiated;
3680 if (EPI.ExceptionSpec.Type == EST_Unevaluated)
3681 NewEST = EST_Unevaluated;
3682
3683 // Mark the function has having an uninstantiated exception specification.
3684 const FunctionProtoType *NewProto
3685 = New->getType()->getAs<FunctionProtoType>();
3686 assert(NewProto && "Template instantiation without function prototype?")(static_cast <bool> (NewProto && "Template instantiation without function prototype?"
) ? void (0) : __assert_fail ("NewProto && \"Template instantiation without function prototype?\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3686, __extension__ __PRETTY_FUNCTION__));
3687 EPI = NewProto->getExtProtoInfo();
3688 EPI.ExceptionSpec.Type = NewEST;
3689 EPI.ExceptionSpec.SourceDecl = New;
3690 EPI.ExceptionSpec.SourceTemplate = ExceptionSpecTemplate;
3691 New->setType(SemaRef.Context.getFunctionType(
3692 NewProto->getReturnType(), NewProto->getParamTypes(), EPI));
3693 } else {
3694 Sema::ContextRAII SwitchContext(SemaRef, New);
3695 SemaRef.SubstExceptionSpec(New, Proto, TemplateArgs);
3696 }
3697 }
3698
3699 // Get the definition. Leaves the variable unchanged if undefined.
3700 const FunctionDecl *Definition = Tmpl;
3701 Tmpl->isDefined(Definition);
3702
3703 SemaRef.InstantiateAttrs(TemplateArgs, Definition, New,
3704 LateAttrs, StartingScope);
3705
3706 return false;
3707}
3708
3709/// \brief Initializes common fields of an instantiated method
3710/// declaration (New) from the corresponding fields of its template
3711/// (Tmpl).
3712///
3713/// \returns true if there was an error
3714bool
3715TemplateDeclInstantiator::InitMethodInstantiation(CXXMethodDecl *New,
3716 CXXMethodDecl *Tmpl) {
3717 if (InitFunctionInstantiation(New, Tmpl))
3718 return true;
3719
3720 New->setAccess(Tmpl->getAccess());
3721 if (Tmpl->isVirtualAsWritten())
3722 New->setVirtualAsWritten(true);
3723
3724 // FIXME: New needs a pointer to Tmpl
3725 return false;
3726}
3727
3728/// In the MS ABI, we need to instantiate default arguments of dllexported
3729/// default constructors along with the constructor definition. This allows IR
3730/// gen to emit a constructor closure which calls the default constructor with
3731/// its default arguments.
3732static void InstantiateDefaultCtorDefaultArgs(Sema &S,
3733 CXXConstructorDecl *Ctor) {
3734 assert(S.Context.getTargetInfo().getCXXABI().isMicrosoft() &&(static_cast <bool> (S.Context.getTargetInfo().getCXXABI
().isMicrosoft() && Ctor->isDefaultConstructor()) ?
void (0) : __assert_fail ("S.Context.getTargetInfo().getCXXABI().isMicrosoft() && Ctor->isDefaultConstructor()"
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3735, __extension__ __PRETTY_FUNCTION__))
3735 Ctor->isDefaultConstructor())(static_cast <bool> (S.Context.getTargetInfo().getCXXABI
().isMicrosoft() && Ctor->isDefaultConstructor()) ?
void (0) : __assert_fail ("S.Context.getTargetInfo().getCXXABI().isMicrosoft() && Ctor->isDefaultConstructor()"
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3735, __extension__ __PRETTY_FUNCTION__));
3736 unsigned NumParams = Ctor->getNumParams();
3737 if (NumParams == 0)
3738 return;
3739 DLLExportAttr *Attr = Ctor->getAttr<DLLExportAttr>();
3740 if (!Attr)
3741 return;
3742 for (unsigned I = 0; I != NumParams; ++I) {
3743 (void)S.CheckCXXDefaultArgExpr(Attr->getLocation(), Ctor,
3744 Ctor->getParamDecl(I));
3745 S.DiscardCleanupsInEvaluationContext();
3746 }
3747}
3748
3749/// \brief Instantiate the definition of the given function from its
3750/// template.
3751///
3752/// \param PointOfInstantiation the point at which the instantiation was
3753/// required. Note that this is not precisely a "point of instantiation"
3754/// for the function, but it's close.
3755///
3756/// \param Function the already-instantiated declaration of a
3757/// function template specialization or member function of a class template
3758/// specialization.
3759///
3760/// \param Recursive if true, recursively instantiates any functions that
3761/// are required by this instantiation.
3762///
3763/// \param DefinitionRequired if true, then we are performing an explicit
3764/// instantiation where the body of the function is required. Complain if
3765/// there is no such body.
3766void Sema::InstantiateFunctionDefinition(SourceLocation PointOfInstantiation,
3767 FunctionDecl *Function,
3768 bool Recursive,
3769 bool DefinitionRequired,
3770 bool AtEndOfTU) {
3771 if (Function->isInvalidDecl() || Function->isDefined() ||
3772 isa<CXXDeductionGuideDecl>(Function))
3773 return;
3774
3775 // Never instantiate an explicit specialization except if it is a class scope
3776 // explicit specialization.
3777 TemplateSpecializationKind TSK = Function->getTemplateSpecializationKind();
3778 if (TSK == TSK_ExplicitSpecialization &&
3779 !Function->getClassScopeSpecializationPattern())
3780 return;
3781
3782 // Find the function body that we'll be substituting.
3783 const FunctionDecl *PatternDecl = Function->getTemplateInstantiationPattern();
3784 assert(PatternDecl && "instantiating a non-template")(static_cast <bool> (PatternDecl && "instantiating a non-template"
) ? void (0) : __assert_fail ("PatternDecl && \"instantiating a non-template\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3784, __extension__ __PRETTY_FUNCTION__));
3785
3786 const FunctionDecl *PatternDef = PatternDecl->getDefinition();
3787 Stmt *Pattern = nullptr;
3788 if (PatternDef) {
3789 Pattern = PatternDef->getBody(PatternDef);
3790 PatternDecl = PatternDef;
3791 if (PatternDef->willHaveBody())
3792 PatternDef = nullptr;
3793 }
3794
3795 // FIXME: We need to track the instantiation stack in order to know which
3796 // definitions should be visible within this instantiation.
3797 if (DiagnoseUninstantiableTemplate(PointOfInstantiation, Function,
3798 Function->getInstantiatedFromMemberFunction(),
3799 PatternDecl, PatternDef, TSK,
3800 /*Complain*/DefinitionRequired)) {
3801 if (DefinitionRequired)
3802 Function->setInvalidDecl();
3803 else if (TSK == TSK_ExplicitInstantiationDefinition) {
3804 // Try again at the end of the translation unit (at which point a
3805 // definition will be required).
3806 assert(!Recursive)(static_cast <bool> (!Recursive) ? void (0) : __assert_fail
("!Recursive", "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3806, __extension__ __PRETTY_FUNCTION__));
3807 Function->setInstantiationIsPending(true);
3808 PendingInstantiations.push_back(
3809 std::make_pair(Function, PointOfInstantiation));
3810 } else if (TSK == TSK_ImplicitInstantiation) {
3811 if (AtEndOfTU && !getDiagnostics().hasErrorOccurred()) {
3812 Diag(PointOfInstantiation, diag::warn_func_template_missing)
3813 << Function;
3814 Diag(PatternDecl->getLocation(), diag::note_forward_template_decl);
3815 if (getLangOpts().CPlusPlus11)
3816 Diag(PointOfInstantiation, diag::note_inst_declaration_hint)
3817 << Function;
3818 }
3819 }
3820
3821 return;
3822 }
3823
3824 // Postpone late parsed template instantiations.
3825 if (PatternDecl->isLateTemplateParsed() &&
3826 !LateTemplateParser) {
3827 Function->setInstantiationIsPending(true);
3828 PendingInstantiations.push_back(
3829 std::make_pair(Function, PointOfInstantiation));
3830 return;
3831 }
3832
3833 // If we're performing recursive template instantiation, create our own
3834 // queue of pending implicit instantiations that we will instantiate later,
3835 // while we're still within our own instantiation context.
3836 // This has to happen before LateTemplateParser below is called, so that
3837 // it marks vtables used in late parsed templates as used.
3838 GlobalEagerInstantiationScope GlobalInstantiations(*this,
3839 /*Enabled=*/Recursive);
3840 LocalEagerInstantiationScope LocalInstantiations(*this);
3841
3842 // Call the LateTemplateParser callback if there is a need to late parse
3843 // a templated function definition.
3844 if (!Pattern && PatternDecl->isLateTemplateParsed() &&
3845 LateTemplateParser) {
3846 // FIXME: Optimize to allow individual templates to be deserialized.
3847 if (PatternDecl->isFromASTFile())
3848 ExternalSource->ReadLateParsedTemplates(LateParsedTemplateMap);
3849
3850 auto LPTIter = LateParsedTemplateMap.find(PatternDecl);
3851 assert(LPTIter != LateParsedTemplateMap.end() &&(static_cast <bool> (LPTIter != LateParsedTemplateMap.end
() && "missing LateParsedTemplate") ? void (0) : __assert_fail
("LPTIter != LateParsedTemplateMap.end() && \"missing LateParsedTemplate\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3852, __extension__ __PRETTY_FUNCTION__))
3852 "missing LateParsedTemplate")(static_cast <bool> (LPTIter != LateParsedTemplateMap.end
() && "missing LateParsedTemplate") ? void (0) : __assert_fail
("LPTIter != LateParsedTemplateMap.end() && \"missing LateParsedTemplate\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3852, __extension__ __PRETTY_FUNCTION__));
3853 LateTemplateParser(OpaqueParser, *LPTIter->second);
3854 Pattern = PatternDecl->getBody(PatternDecl);
3855 }
3856
3857 // Note, we should never try to instantiate a deleted function template.
3858 assert((Pattern || PatternDecl->isDefaulted()) &&(static_cast <bool> ((Pattern || PatternDecl->isDefaulted
()) && "unexpected kind of function template definition"
) ? void (0) : __assert_fail ("(Pattern || PatternDecl->isDefaulted()) && \"unexpected kind of function template definition\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3859, __extension__ __PRETTY_FUNCTION__))
3859 "unexpected kind of function template definition")(static_cast <bool> ((Pattern || PatternDecl->isDefaulted
()) && "unexpected kind of function template definition"
) ? void (0) : __assert_fail ("(Pattern || PatternDecl->isDefaulted()) && \"unexpected kind of function template definition\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 3859, __extension__ __PRETTY_FUNCTION__));
3860
3861 // C++1y [temp.explicit]p10:
3862 // Except for inline functions, declarations with types deduced from their
3863 // initializer or return value, and class template specializations, other
3864 // explicit instantiation declarations have the effect of suppressing the
3865 // implicit instantiation of the entity to which they refer.
3866 if (TSK == TSK_ExplicitInstantiationDeclaration &&
3867 !PatternDecl->isInlined() &&
3868 !PatternDecl->getReturnType()->getContainedAutoType())
3869 return;
3870
3871 if (PatternDecl->isInlined()) {
3872 // Function, and all later redeclarations of it (from imported modules,
3873 // for instance), are now implicitly inline.
3874 for (auto *D = Function->getMostRecentDecl(); /**/;
3875 D = D->getPreviousDecl()) {
3876 D->setImplicitlyInline();
3877 if (D == Function)
3878 break;
3879 }
3880 }
3881
3882 InstantiatingTemplate Inst(*this, PointOfInstantiation, Function);
3883 if (Inst.isInvalid() || Inst.isAlreadyInstantiating())
3884 return;
3885 PrettyDeclStackTraceEntry CrashInfo(*this, Function, SourceLocation(),
3886 "instantiating function definition");
3887
3888 // The instantiation is visible here, even if it was first declared in an
3889 // unimported module.
3890 Function->setVisibleDespiteOwningModule();
3891
3892 // Copy the inner loc start from the pattern.
3893 Function->setInnerLocStart(PatternDecl->getInnerLocStart());
3894
3895 EnterExpressionEvaluationContext EvalContext(
3896 *this, Sema::ExpressionEvaluationContext::PotentiallyEvaluated);
3897
3898 // Introduce a new scope where local variable instantiations will be
3899 // recorded, unless we're actually a member function within a local
3900 // class, in which case we need to merge our results with the parent
3901 // scope (of the enclosing function).
3902 bool MergeWithParentScope = false;
3903 if (CXXRecordDecl *Rec = dyn_cast<CXXRecordDecl>(Function->getDeclContext()))
3904 MergeWithParentScope = Rec->isLocalClass();
3905
3906 LocalInstantiationScope Scope(*this, MergeWithParentScope);
3907
3908 if (PatternDecl->isDefaulted())
3909 SetDeclDefaulted(Function, PatternDecl->getLocation());
3910 else {
3911 MultiLevelTemplateArgumentList TemplateArgs =
3912 getTemplateInstantiationArgs(Function, nullptr, false, PatternDecl);
3913
3914 // Substitute into the qualifier; we can get a substitution failure here
3915 // through evil use of alias templates.
3916 // FIXME: Is CurContext correct for this? Should we go to the (instantiation
3917 // of the) lexical context of the pattern?
3918 SubstQualifier(*this, PatternDecl, Function, TemplateArgs);
3919
3920 ActOnStartOfFunctionDef(nullptr, Function);
3921
3922 // Enter the scope of this instantiation. We don't use
3923 // PushDeclContext because we don't have a scope.
3924 Sema::ContextRAII savedContext(*this, Function);
3925
3926 if (addInstantiatedParametersToScope(*this, Function, PatternDecl, Scope,
3927 TemplateArgs))
3928 return;
3929
3930 if (CXXConstructorDecl *Ctor = dyn_cast<CXXConstructorDecl>(Function)) {
3931 // If this is a constructor, instantiate the member initializers.
3932 InstantiateMemInitializers(Ctor, cast<CXXConstructorDecl>(PatternDecl),
3933 TemplateArgs);
3934
3935 // If this is an MS ABI dllexport default constructor, instantiate any
3936 // default arguments.
3937 if (Context.getTargetInfo().getCXXABI().isMicrosoft() &&
3938 Ctor->isDefaultConstructor()) {
3939 InstantiateDefaultCtorDefaultArgs(*this, Ctor);
3940 }
3941 }
3942
3943 // Instantiate the function body.
3944 StmtResult Body = SubstStmt(Pattern, TemplateArgs);
3945
3946 if (Body.isInvalid())
3947 Function->setInvalidDecl();
3948
3949 // FIXME: finishing the function body while in an expression evaluation
3950 // context seems wrong. Investigate more.
3951 ActOnFinishFunctionBody(Function, Body.get(),
3952 /*IsInstantiation=*/true);
3953
3954 PerformDependentDiagnostics(PatternDecl, TemplateArgs);
3955
3956 if (auto *Listener = getASTMutationListener())
3957 Listener->FunctionDefinitionInstantiated(Function);
3958
3959 savedContext.pop();
3960 }
3961
3962 DeclGroupRef DG(Function);
3963 Consumer.HandleTopLevelDecl(DG);
3964
3965 // This class may have local implicit instantiations that need to be
3966 // instantiation within this scope.
3967 LocalInstantiations.perform();
3968 Scope.Exit();
3969 GlobalInstantiations.perform();
3970}
3971
3972VarTemplateSpecializationDecl *Sema::BuildVarTemplateInstantiation(
3973 VarTemplateDecl *VarTemplate, VarDecl *FromVar,
3974 const TemplateArgumentList &TemplateArgList,
3975 const TemplateArgumentListInfo &TemplateArgsInfo,
3976 SmallVectorImpl<TemplateArgument> &Converted,
3977 SourceLocation PointOfInstantiation, void *InsertPos,
3978 LateInstantiatedAttrVec *LateAttrs,
3979 LocalInstantiationScope *StartingScope) {
3980 if (FromVar->isInvalidDecl())
3981 return nullptr;
3982
3983 InstantiatingTemplate Inst(*this, PointOfInstantiation, FromVar);
3984 if (Inst.isInvalid())
3985 return nullptr;
3986
3987 MultiLevelTemplateArgumentList TemplateArgLists;
3988 TemplateArgLists.addOuterTemplateArguments(&TemplateArgList);
3989
3990 // Instantiate the first declaration of the variable template: for a partial
3991 // specialization of a static data member template, the first declaration may
3992 // or may not be the declaration in the class; if it's in the class, we want
3993 // to instantiate a member in the class (a declaration), and if it's outside,
3994 // we want to instantiate a definition.
3995 //
3996 // If we're instantiating an explicitly-specialized member template or member
3997 // partial specialization, don't do this. The member specialization completely
3998 // replaces the original declaration in this case.
3999 bool IsMemberSpec = false;
4000 if (VarTemplatePartialSpecializationDecl *PartialSpec =
4001 dyn_cast<VarTemplatePartialSpecializationDecl>(FromVar))
4002 IsMemberSpec = PartialSpec->isMemberSpecialization();
4003 else if (VarTemplateDecl *FromTemplate = FromVar->getDescribedVarTemplate())
4004 IsMemberSpec = FromTemplate->isMemberSpecialization();
4005 if (!IsMemberSpec)
4006 FromVar = FromVar->getFirstDecl();
4007
4008 MultiLevelTemplateArgumentList MultiLevelList(TemplateArgList);
4009 TemplateDeclInstantiator Instantiator(*this, FromVar->getDeclContext(),
4010 MultiLevelList);
4011
4012 // TODO: Set LateAttrs and StartingScope ...
4013
4014 return cast_or_null<VarTemplateSpecializationDecl>(
4015 Instantiator.VisitVarTemplateSpecializationDecl(
4016 VarTemplate, FromVar, InsertPos, TemplateArgsInfo, Converted));
4017}
4018
4019/// \brief Instantiates a variable template specialization by completing it
4020/// with appropriate type information and initializer.
4021VarTemplateSpecializationDecl *Sema::CompleteVarTemplateSpecializationDecl(
4022 VarTemplateSpecializationDecl *VarSpec, VarDecl *PatternDecl,
4023 const MultiLevelTemplateArgumentList &TemplateArgs) {
4024
4025 // Do substitution on the type of the declaration
4026 TypeSourceInfo *DI =
4027 SubstType(PatternDecl->getTypeSourceInfo(), TemplateArgs,
4028 PatternDecl->getTypeSpecStartLoc(), PatternDecl->getDeclName());
4029 if (!DI)
4030 return nullptr;
4031
4032 // Update the type of this variable template specialization.
4033 VarSpec->setType(DI->getType());
4034
4035 // Instantiate the initializer.
4036 InstantiateVariableInitializer(VarSpec, PatternDecl, TemplateArgs);
4037
4038 return VarSpec;
4039}
4040
4041/// BuildVariableInstantiation - Used after a new variable has been created.
4042/// Sets basic variable data and decides whether to postpone the
4043/// variable instantiation.
4044void Sema::BuildVariableInstantiation(
4045 VarDecl *NewVar, VarDecl *OldVar,
4046 const MultiLevelTemplateArgumentList &TemplateArgs,
4047 LateInstantiatedAttrVec *LateAttrs, DeclContext *Owner,
4048 LocalInstantiationScope *StartingScope,
4049 bool InstantiatingVarTemplate) {
4050
4051 // If we are instantiating a local extern declaration, the
4052 // instantiation belongs lexically to the containing function.
4053 // If we are instantiating a static data member defined
4054 // out-of-line, the instantiation will have the same lexical
4055 // context (which will be a namespace scope) as the template.
4056 if (OldVar->isLocalExternDecl()) {
4057 NewVar->setLocalExternDecl();
4058 NewVar->setLexicalDeclContext(Owner);
4059 } else if (OldVar->isOutOfLine())
4060 NewVar->setLexicalDeclContext(OldVar->getLexicalDeclContext());
4061 NewVar->setTSCSpec(OldVar->getTSCSpec());
4062 NewVar->setInitStyle(OldVar->getInitStyle());
4063 NewVar->setCXXForRangeDecl(OldVar->isCXXForRangeDecl());
4064 NewVar->setConstexpr(OldVar->isConstexpr());
4065 NewVar->setInitCapture(OldVar->isInitCapture());
4066 NewVar->setPreviousDeclInSameBlockScope(
4067 OldVar->isPreviousDeclInSameBlockScope());
4068 NewVar->setAccess(OldVar->getAccess());
4069
4070 if (!OldVar->isStaticDataMember()) {
4071 if (OldVar->isUsed(false))
4072 NewVar->setIsUsed();
4073 NewVar->setReferenced(OldVar->isReferenced());
4074 }
4075
4076 InstantiateAttrs(TemplateArgs, OldVar, NewVar, LateAttrs, StartingScope);
4077
4078 LookupResult Previous(
4079 *this, NewVar->getDeclName(), NewVar->getLocation(),
4080 NewVar->isLocalExternDecl() ? Sema::LookupRedeclarationWithLinkage
4081 : Sema::LookupOrdinaryName,
4082 NewVar->isLocalExternDecl() ? Sema::ForExternalRedeclaration
4083 : forRedeclarationInCurContext());
4084
4085 if (NewVar->isLocalExternDecl() && OldVar->getPreviousDecl() &&
4086 (!OldVar->getPreviousDecl()->getDeclContext()->isDependentContext() ||
4087 OldVar->getPreviousDecl()->getDeclContext()==OldVar->getDeclContext())) {
4088 // We have a previous declaration. Use that one, so we merge with the
4089 // right type.
4090 if (NamedDecl *NewPrev = FindInstantiatedDecl(
4091 NewVar->getLocation(), OldVar->getPreviousDecl(), TemplateArgs))
4092 Previous.addDecl(NewPrev);
4093 } else if (!isa<VarTemplateSpecializationDecl>(NewVar) &&
4094 OldVar->hasLinkage())
4095 LookupQualifiedName(Previous, NewVar->getDeclContext(), false);
4096 CheckVariableDeclaration(NewVar, Previous);
4097
4098 if (!InstantiatingVarTemplate) {
4099 NewVar->getLexicalDeclContext()->addHiddenDecl(NewVar);
4100 if (!NewVar->isLocalExternDecl() || !NewVar->getPreviousDecl())
4101 NewVar->getDeclContext()->makeDeclVisibleInContext(NewVar);
4102 }
4103
4104 if (!OldVar->isOutOfLine()) {
4105 if (NewVar->getDeclContext()->isFunctionOrMethod())
4106 CurrentInstantiationScope->InstantiatedLocal(OldVar, NewVar);
4107 }
4108
4109 // Link instantiations of static data members back to the template from
4110 // which they were instantiated.
4111 if (NewVar->isStaticDataMember() && !InstantiatingVarTemplate)
4112 NewVar->setInstantiationOfStaticDataMember(OldVar,
4113 TSK_ImplicitInstantiation);
4114
4115 // Forward the mangling number from the template to the instantiated decl.
4116 Context.setManglingNumber(NewVar, Context.getManglingNumber(OldVar));
4117 Context.setStaticLocalNumber(NewVar, Context.getStaticLocalNumber(OldVar));
4118
4119 // Delay instantiation of the initializer for variable templates or inline
4120 // static data members until a definition of the variable is needed. We need
4121 // it right away if the type contains 'auto'.
4122 if ((!isa<VarTemplateSpecializationDecl>(NewVar) &&
4123 !InstantiatingVarTemplate &&
4124 !(OldVar->isInline() && OldVar->isThisDeclarationADefinition())) ||
4125 NewVar->getType()->isUndeducedType())
4126 InstantiateVariableInitializer(NewVar, OldVar, TemplateArgs);
4127
4128 // Diagnose unused local variables with dependent types, where the diagnostic
4129 // will have been deferred.
4130 if (!NewVar->isInvalidDecl() &&
4131 NewVar->getDeclContext()->isFunctionOrMethod() &&
4132 OldVar->getType()->isDependentType())
4133 DiagnoseUnusedDecl(NewVar);
4134}
4135
4136/// \brief Instantiate the initializer of a variable.
4137void Sema::InstantiateVariableInitializer(
4138 VarDecl *Var, VarDecl *OldVar,
4139 const MultiLevelTemplateArgumentList &TemplateArgs) {
4140 // We propagate the 'inline' flag with the initializer, because it
4141 // would otherwise imply that the variable is a definition for a
4142 // non-static data member.
4143 if (OldVar->isInlineSpecified())
4144 Var->setInlineSpecified();
4145 else if (OldVar->isInline())
4146 Var->setImplicitlyInline();
4147
4148 if (OldVar->getInit()) {
4149 EnterExpressionEvaluationContext Evaluated(
4150 *this, Sema::ExpressionEvaluationContext::PotentiallyEvaluated, Var);
4151
4152 // Instantiate the initializer.
4153 ExprResult Init;
4154
4155 {
4156 ContextRAII SwitchContext(*this, Var->getDeclContext());
4157 Init = SubstInitializer(OldVar->getInit(), TemplateArgs,
4158 OldVar->getInitStyle() == VarDecl::CallInit);
4159 }
4160
4161 if (!Init.isInvalid()) {
4162 Expr *InitExpr = Init.get();
4163
4164 if (Var->hasAttr<DLLImportAttr>() &&
4165 (!InitExpr ||
4166 !InitExpr->isConstantInitializer(getASTContext(), false))) {
4167 // Do not dynamically initialize dllimport variables.
4168 } else if (InitExpr) {
4169 bool DirectInit = OldVar->isDirectInit();
4170 AddInitializerToDecl(Var, InitExpr, DirectInit);
4171 } else
4172 ActOnUninitializedDecl(Var);
4173 } else {
4174 // FIXME: Not too happy about invalidating the declaration
4175 // because of a bogus initializer.
4176 Var->setInvalidDecl();
4177 }
4178 } else {
4179 if (Var->isStaticDataMember()) {
4180 if (!Var->isOutOfLine())
4181 return;
4182
4183 // If the declaration inside the class had an initializer, don't add
4184 // another one to the out-of-line definition.
4185 if (OldVar->getFirstDecl()->hasInit())
4186 return;
4187 }
4188
4189 // We'll add an initializer to a for-range declaration later.
4190 if (Var->isCXXForRangeDecl())
4191 return;
4192
4193 ActOnUninitializedDecl(Var);
4194 }
4195}
4196
4197/// \brief Instantiate the definition of the given variable from its
4198/// template.
4199///
4200/// \param PointOfInstantiation the point at which the instantiation was
4201/// required. Note that this is not precisely a "point of instantiation"
4202/// for the function, but it's close.
4203///
4204/// \param Var the already-instantiated declaration of a static member
4205/// variable of a class template specialization.
4206///
4207/// \param Recursive if true, recursively instantiates any functions that
4208/// are required by this instantiation.
4209///
4210/// \param DefinitionRequired if true, then we are performing an explicit
4211/// instantiation where an out-of-line definition of the member variable
4212/// is required. Complain if there is no such definition.
4213void Sema::InstantiateStaticDataMemberDefinition(
4214 SourceLocation PointOfInstantiation,
4215 VarDecl *Var,
4216 bool Recursive,
4217 bool DefinitionRequired) {
4218 InstantiateVariableDefinition(PointOfInstantiation, Var, Recursive,
1
Calling 'Sema::InstantiateVariableDefinition'
→
4219 DefinitionRequired);
4220}
4221
4222void Sema::InstantiateVariableDefinition(SourceLocation PointOfInstantiation,
4223 VarDecl *Var, bool Recursive,
4224 bool DefinitionRequired, bool AtEndOfTU) {
4225 if (Var->isInvalidDecl())
2
←
Assuming the condition is false
→
3
←
Taking false branch
→
34
←
Assuming the condition is false
→
35
←
Taking false branch
→
66
←
Assuming the condition is false
→
67
←
Taking false branch
→
98
←
Assuming the condition is false
→
99
←
Taking false branch
→
130
←
Assuming the condition is false
→
131
←
Taking false branch
→
4226 return;
4227
4228 VarTemplateSpecializationDecl *VarSpec =
4229 dyn_cast<VarTemplateSpecializationDecl>(Var);
4230 VarDecl *PatternDecl = nullptr, *Def = nullptr;
4231 MultiLevelTemplateArgumentList TemplateArgs =
4232 getTemplateInstantiationArgs(Var);
4233
4234 if (VarSpec) {
4
←
Taking false branch
→
36
←
Taking false branch
→
68
←
Taking false branch
→
100
←
Taking false branch
→
132
←
Taking false branch
→
4235 // If this is a variable template specialization, make sure that it is
4236 // non-dependent, then find its instantiation pattern.
4237 bool InstantiationDependent = false;
4238 assert(!TemplateSpecializationType::anyDependentTemplateArguments((static_cast <bool> (!TemplateSpecializationType::anyDependentTemplateArguments
( VarSpec->getTemplateArgsInfo(), InstantiationDependent) &&
"Only instantiate variable template specializations that are "
"not type-dependent") ? void (0) : __assert_fail ("!TemplateSpecializationType::anyDependentTemplateArguments( VarSpec->getTemplateArgsInfo(), InstantiationDependent) && \"Only instantiate variable template specializations that are \" \"not type-dependent\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4241, __extension__ __PRETTY_FUNCTION__))
4239 VarSpec->getTemplateArgsInfo(), InstantiationDependent) &&(static_cast <bool> (!TemplateSpecializationType::anyDependentTemplateArguments
( VarSpec->getTemplateArgsInfo(), InstantiationDependent) &&
"Only instantiate variable template specializations that are "
"not type-dependent") ? void (0) : __assert_fail ("!TemplateSpecializationType::anyDependentTemplateArguments( VarSpec->getTemplateArgsInfo(), InstantiationDependent) && \"Only instantiate variable template specializations that are \" \"not type-dependent\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4241, __extension__ __PRETTY_FUNCTION__))
4240 "Only instantiate variable template specializations that are "(static_cast <bool> (!TemplateSpecializationType::anyDependentTemplateArguments
( VarSpec->getTemplateArgsInfo(), InstantiationDependent) &&
"Only instantiate variable template specializations that are "
"not type-dependent") ? void (0) : __assert_fail ("!TemplateSpecializationType::anyDependentTemplateArguments( VarSpec->getTemplateArgsInfo(), InstantiationDependent) && \"Only instantiate variable template specializations that are \" \"not type-dependent\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4241, __extension__ __PRETTY_FUNCTION__))
4241 "not type-dependent")(static_cast <bool> (!TemplateSpecializationType::anyDependentTemplateArguments
( VarSpec->getTemplateArgsInfo(), InstantiationDependent) &&
"Only instantiate variable template specializations that are "
"not type-dependent") ? void (0) : __assert_fail ("!TemplateSpecializationType::anyDependentTemplateArguments( VarSpec->getTemplateArgsInfo(), InstantiationDependent) && \"Only instantiate variable template specializations that are \" \"not type-dependent\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4241, __extension__ __PRETTY_FUNCTION__));
4242 (void)InstantiationDependent;
4243
4244 // Find the variable initialization that we'll be substituting. If the
4245 // pattern was instantiated from a member template, look back further to
4246 // find the real pattern.
4247 assert(VarSpec->getSpecializedTemplate() &&(static_cast <bool> (VarSpec->getSpecializedTemplate
() && "Specialization without specialized template?")
? void (0) : __assert_fail ("VarSpec->getSpecializedTemplate() && \"Specialization without specialized template?\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4248, __extension__ __PRETTY_FUNCTION__))
4248 "Specialization without specialized template?")(static_cast <bool> (VarSpec->getSpecializedTemplate
() && "Specialization without specialized template?")
? void (0) : __assert_fail ("VarSpec->getSpecializedTemplate() && \"Specialization without specialized template?\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4248, __extension__ __PRETTY_FUNCTION__));
4249 llvm::PointerUnion<VarTemplateDecl *,
4250 VarTemplatePartialSpecializationDecl *> PatternPtr =
4251 VarSpec->getSpecializedTemplateOrPartial();
4252 if (PatternPtr.is<VarTemplatePartialSpecializationDecl *>()) {
4253 VarTemplatePartialSpecializationDecl *Tmpl =
4254 PatternPtr.get<VarTemplatePartialSpecializationDecl *>();
4255 while (VarTemplatePartialSpecializationDecl *From =
4256 Tmpl->getInstantiatedFromMember()) {
4257 if (Tmpl->isMemberSpecialization())
4258 break;
4259
4260 Tmpl = From;
4261 }
4262 PatternDecl = Tmpl;
4263 } else {
4264 VarTemplateDecl *Tmpl = PatternPtr.get<VarTemplateDecl *>();
4265 while (VarTemplateDecl *From =
4266 Tmpl->getInstantiatedFromMemberTemplate()) {
4267 if (Tmpl->isMemberSpecialization())
4268 break;
4269
4270 Tmpl = From;
4271 }
4272 PatternDecl = Tmpl->getTemplatedDecl();
4273 }
4274
4275 // If this is a static data member template, there might be an
4276 // uninstantiated initializer on the declaration. If so, instantiate
4277 // it now.
4278 if (PatternDecl->isStaticDataMember() &&
4279 (PatternDecl = PatternDecl->getFirstDecl())->hasInit() &&
4280 !Var->hasInit()) {
4281 // FIXME: Factor out the duplicated instantiation context setup/tear down
4282 // code here.
4283 InstantiatingTemplate Inst(*this, PointOfInstantiation, Var);
4284 if (Inst.isInvalid() || Inst.isAlreadyInstantiating())
4285 return;
4286 PrettyDeclStackTraceEntry CrashInfo(*this, Var, SourceLocation(),
4287 "instantiating variable initializer");
4288
4289 // The instantiation is visible here, even if it was first declared in an
4290 // unimported module.
4291 Var->setVisibleDespiteOwningModule();
4292
4293 // If we're performing recursive template instantiation, create our own
4294 // queue of pending implicit instantiations that we will instantiate
4295 // later, while we're still within our own instantiation context.
4296 GlobalEagerInstantiationScope GlobalInstantiations(*this,
4297 /*Enabled=*/Recursive);
4298 LocalInstantiationScope Local(*this);
4299 LocalEagerInstantiationScope LocalInstantiations(*this);
4300
4301 // Enter the scope of this instantiation. We don't use
4302 // PushDeclContext because we don't have a scope.
4303 ContextRAII PreviousContext(*this, Var->getDeclContext());
4304 InstantiateVariableInitializer(Var, PatternDecl, TemplateArgs);
4305 PreviousContext.pop();
4306
4307 // This variable may have local implicit instantiations that need to be
4308 // instantiated within this scope.
4309 LocalInstantiations.perform();
4310 Local.Exit();
4311 GlobalInstantiations.perform();
4312 }
4313
4314 // Find actual definition
4315 Def = PatternDecl->getDefinition(getASTContext());
4316 } else {
4317 // If this is a static data member, find its out-of-line definition.
4318 assert(Var->isStaticDataMember() && "not a static data member?")(static_cast <bool> (Var->isStaticDataMember() &&
"not a static data member?") ? void (0) : __assert_fail ("Var->isStaticDataMember() && \"not a static data member?\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4318, __extension__ __PRETTY_FUNCTION__));
4319 PatternDecl = Var->getInstantiatedFromStaticDataMember();
4320
4321 assert(PatternDecl && "data member was not instantiated from a template?")(static_cast <bool> (PatternDecl && "data member was not instantiated from a template?"
) ? void (0) : __assert_fail ("PatternDecl && \"data member was not instantiated from a template?\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4321, __extension__ __PRETTY_FUNCTION__));
4322 assert(PatternDecl->isStaticDataMember() && "not a static data member?")(static_cast <bool> (PatternDecl->isStaticDataMember
() && "not a static data member?") ? void (0) : __assert_fail
("PatternDecl->isStaticDataMember() && \"not a static data member?\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4322, __extension__ __PRETTY_FUNCTION__));
4323 Def = PatternDecl->getDefinition();
37
←
Calling 'VarDecl::getDefinition'
→
38
←
Returning from 'VarDecl::getDefinition'
→
69
←
Calling 'VarDecl::getDefinition'
→
70
←
Returning from 'VarDecl::getDefinition'
→
101
←
Calling 'VarDecl::getDefinition'
→
102
←
Returning from 'VarDecl::getDefinition'
→
133
←
Calling 'VarDecl::getDefinition'
→
134
←
Returning from 'VarDecl::getDefinition'
→
135
←
Value assigned to 'Def'
→
4324 }
4325
4326 TemplateSpecializationKind TSK = Var->getTemplateSpecializationKind();
4327
4328 // If we don't have a definition of the variable template, we won't perform
4329 // any instantiation. Rather, we rely on the user to instantiate this
4330 // definition (or provide a specialization for it) in another translation
4331 // unit.
4332 if (!Def && !DefinitionRequired) {
5
←
Assuming 'Def' is non-null
→
39
←
Assuming 'Def' is non-null
→
71
←
Assuming 'Def' is non-null
→
103
←
Assuming 'Def' is non-null
→
136
←
Assuming 'Def' is null
→
137
←
Assuming pointer value is null
→
138
←
Taking true branch
→
4333 if (TSK == TSK_ExplicitInstantiationDefinition) {
139
←
Assuming 'TSK' is not equal to TSK_ExplicitInstantiationDefinition
→
140
←
Taking false branch
→
4334 PendingInstantiations.push_back(
4335 std::make_pair(Var, PointOfInstantiation));
4336 } else if (TSK == TSK_ImplicitInstantiation) {
141
←
Assuming 'TSK' is not equal to TSK_ImplicitInstantiation
→
142
←
Taking false branch
→
4337 // Warn about missing definition at the end of translation unit.
4338 if (AtEndOfTU && !getDiagnostics().hasErrorOccurred()) {
4339 Diag(PointOfInstantiation, diag::warn_var_template_missing)
4340 << Var;
4341 Diag(PatternDecl->getLocation(), diag::note_forward_template_decl);
4342 if (getLangOpts().CPlusPlus11)
4343 Diag(PointOfInstantiation, diag::note_inst_declaration_hint) << Var;
4344 }
4345 return;
4346 }
4347
4348 }
4349
4350 // FIXME: We need to track the instantiation stack in order to know which
4351 // definitions should be visible within this instantiation.
4352 // FIXME: Produce diagnostics when Var->getInstantiatedFromStaticDataMember().
4353 if (DiagnoseUninstantiableTemplate(PointOfInstantiation, Var,
6
←
Assuming the condition is false
→
7
←
Taking false branch
→
40
←
Assuming the condition is false
→
41
←
Taking false branch
→
72
←
Assuming the condition is false
→
73
←
Taking false branch
→
104
←
Assuming the condition is false
→
105
←
Taking false branch
→
143
←
Assuming the condition is false
→
144
←
Taking false branch
→
4354 /*InstantiatedFromMember*/false,
4355 PatternDecl, Def, TSK,
4356 /*Complain*/DefinitionRequired))
4357 return;
4358
4359
4360 // Never instantiate an explicit specialization.
4361 if (TSK == TSK_ExplicitSpecialization)
8
←
Assuming 'TSK' is not equal to TSK_ExplicitSpecialization
→
9
←
Taking false branch
→
42
←
Assuming 'TSK' is not equal to TSK_ExplicitSpecialization
→
43
←
Taking false branch
→
74
←
Assuming 'TSK' is not equal to TSK_ExplicitSpecialization
→
75
←
Taking false branch
→
106
←
Assuming 'TSK' is not equal to TSK_ExplicitSpecialization
→
107
←
Taking false branch
→
145
←
Assuming 'TSK' is not equal to TSK_ExplicitSpecialization
→
146
←
Taking false branch
→
4362 return;
4363
4364 // C++11 [temp.explicit]p10:
4365 // Except for inline functions, const variables of literal types, variables
4366 // of reference types, [...] explicit instantiation declarations
4367 // have the effect of suppressing the implicit instantiation of the entity
4368 // to which they refer.
4369 if (TSK == TSK_ExplicitInstantiationDeclaration &&
10
←
Assuming 'TSK' is not equal to TSK_ExplicitInstantiationDeclaration
→
44
←
Assuming 'TSK' is not equal to TSK_ExplicitInstantiationDeclaration
→
76
←
Assuming 'TSK' is not equal to TSK_ExplicitInstantiationDeclaration
→
108
←
Assuming 'TSK' is not equal to TSK_ExplicitInstantiationDeclaration
→
147
←
Assuming 'TSK' is not equal to TSK_ExplicitInstantiationDeclaration
→
4370 !Var->isUsableInConstantExpressions(getASTContext()))
4371 return;
4372
4373 // Make sure to pass the instantiated variable to the consumer at the end.
4374 struct PassToConsumerRAII {
4375 ASTConsumer &Consumer;
4376 VarDecl *Var;
4377
4378 PassToConsumerRAII(ASTConsumer &Consumer, VarDecl *Var)
4379 : Consumer(Consumer), Var(Var) { }
4380
4381 ~PassToConsumerRAII() {
4382 Consumer.HandleCXXStaticMemberVarInstantiation(Var);
4383 }
4384 } PassToConsumerRAII(Consumer, Var);
4385
4386 // If we already have a definition, we're done.
4387 if (VarDecl *Def = Var->getDefinition()) {
11
←
Assuming 'Def' is null
→
12
←
Taking false branch
→
45
←
Assuming 'Def' is null
→
46
←
Taking false branch
→
77
←
Assuming 'Def' is null
→
78
←
Taking false branch
→
109
←
Assuming 'Def' is null
→
110
←
Taking false branch
→
148
←
Assuming 'Def' is null
→
149
←
Taking false branch
→
4388 // We may be explicitly instantiating something we've already implicitly
4389 // instantiated.
4390 Def->setTemplateSpecializationKind(Var->getTemplateSpecializationKind(),
4391 PointOfInstantiation);
4392 return;
4393 }
4394
4395 InstantiatingTemplate Inst(*this, PointOfInstantiation, Var);
4396 if (Inst.isInvalid() || Inst.isAlreadyInstantiating())
13
←
Assuming the condition is false
→
14
←
Assuming the condition is false
→
15
←
Taking false branch
→
47
←
Assuming the condition is false
→
48
←
Assuming the condition is false
→
49
←
Taking false branch
→
79
←
Assuming the condition is false
→
80
←
Assuming the condition is false
→
81
←
Taking false branch
→
111
←
Assuming the condition is false
→
112
←
Assuming the condition is false
→
113
←
Taking false branch
→
150
←
Assuming the condition is false
→
151
←
Assuming the condition is false
→
152
←
Taking false branch
→
4397 return;
4398 PrettyDeclStackTraceEntry CrashInfo(*this, Var, SourceLocation(),
4399 "instantiating variable definition");
4400
4401 // If we're performing recursive template instantiation, create our own
4402 // queue of pending implicit instantiations that we will instantiate later,
4403 // while we're still within our own instantiation context.
4404 GlobalEagerInstantiationScope GlobalInstantiations(*this,
4405 /*Enabled=*/Recursive);
4406
4407 // Enter the scope of this instantiation. We don't use
4408 // PushDeclContext because we don't have a scope.
4409 ContextRAII PreviousContext(*this, Var->getDeclContext());
4410 LocalInstantiationScope Local(*this);
4411
4412 LocalEagerInstantiationScope LocalInstantiations(*this);
4413
4414 VarDecl *OldVar = Var;
4415 if (Def->isStaticDataMember() && !Def->isOutOfLine()) {
153
←
Called C++ object pointer is null
4416 // We're instantiating an inline static data member whose definition was
4417 // provided inside the class.
4418 InstantiateVariableInitializer(Var, Def, TemplateArgs);
4419 } else if (!VarSpec) {
16
←
Taking true branch
→
50
←
Taking true branch
→
82
←
Taking true branch
→
114
←
Taking true branch
→
4420 Var = cast_or_null<VarDecl>(SubstDecl(Def, Var->getDeclContext(),
4421 TemplateArgs));
4422 } else if (Var->isStaticDataMember() &&
4423 Var->getLexicalDeclContext()->isRecord()) {
4424 // We need to instantiate the definition of a static data member template,
4425 // and all we have is the in-class declaration of it. Instantiate a separate
4426 // declaration of the definition.
4427 TemplateDeclInstantiator Instantiator(*this, Var->getDeclContext(),
4428 TemplateArgs);
4429 Var = cast_or_null<VarDecl>(Instantiator.VisitVarTemplateSpecializationDecl(
4430 VarSpec->getSpecializedTemplate(), Def, nullptr,
4431 VarSpec->getTemplateArgsInfo(), VarSpec->getTemplateArgs().asArray()));
4432 if (Var) {
4433 llvm::PointerUnion<VarTemplateDecl *,
4434 VarTemplatePartialSpecializationDecl *> PatternPtr =
4435 VarSpec->getSpecializedTemplateOrPartial();
4436 if (VarTemplatePartialSpecializationDecl *Partial =
4437 PatternPtr.dyn_cast<VarTemplatePartialSpecializationDecl *>())
4438 cast<VarTemplateSpecializationDecl>(Var)->setInstantiationOf(
4439 Partial, &VarSpec->getTemplateInstantiationArgs());
4440
4441 // Merge the definition with the declaration.
4442 LookupResult R(*this, Var->getDeclName(), Var->getLocation(),
4443 LookupOrdinaryName, forRedeclarationInCurContext());
4444 R.addDecl(OldVar);
4445 MergeVarDecl(Var, R);
4446
4447 // Attach the initializer.
4448 InstantiateVariableInitializer(Var, Def, TemplateArgs);
4449 }
4450 } else
4451 // Complete the existing variable's definition with an appropriately
4452 // substituted type and initializer.
4453 Var = CompleteVarTemplateSpecializationDecl(VarSpec, Def, TemplateArgs);
4454
4455 PreviousContext.pop();
4456
4457 if (Var) {
17
←
Taking true branch
→
51
←
Assuming 'Var' is null
→
52
←
Taking false branch
→
83
←
Assuming 'Var' is null
→
84
←
Taking false branch
→
115
←
Assuming 'Var' is null
→
116
←
Taking false branch
→
4458 PassToConsumerRAII.Var = Var;
4459 Var->setTemplateSpecializationKind(OldVar->getTemplateSpecializationKind(),
4460 OldVar->getPointOfInstantiation());
4461 }
4462
4463 // This variable may have local implicit instantiations that need to be
4464 // instantiated within this scope.
4465 LocalInstantiations.perform();
4466 Local.Exit();
4467 GlobalInstantiations.perform();
18
←
Calling 'GlobalEagerInstantiationScope::perform'
→
4468}
4469
4470void
4471Sema::InstantiateMemInitializers(CXXConstructorDecl *New,
4472 const CXXConstructorDecl *Tmpl,
4473 const MultiLevelTemplateArgumentList &TemplateArgs) {
4474
4475 SmallVector<CXXCtorInitializer*, 4> NewInits;
4476 bool AnyErrors = Tmpl->isInvalidDecl();
4477
4478 // Instantiate all the initializers.
4479 for (const auto *Init : Tmpl->inits()) {
4480 // Only instantiate written initializers, let Sema re-construct implicit
4481 // ones.
4482 if (!Init->isWritten())
4483 continue;
4484
4485 SourceLocation EllipsisLoc;
4486
4487 if (Init->isPackExpansion()) {
4488 // This is a pack expansion. We should expand it now.
4489 TypeLoc BaseTL = Init->getTypeSourceInfo()->getTypeLoc();
4490 SmallVector<UnexpandedParameterPack, 4> Unexpanded;
4491 collectUnexpandedParameterPacks(BaseTL, Unexpanded);
4492 collectUnexpandedParameterPacks(Init->getInit(), Unexpanded);
4493 bool ShouldExpand = false;
4494 bool RetainExpansion = false;
4495 Optional<unsigned> NumExpansions;
4496 if (CheckParameterPacksForExpansion(Init->getEllipsisLoc(),
4497 BaseTL.getSourceRange(),
4498 Unexpanded,
4499 TemplateArgs, ShouldExpand,
4500 RetainExpansion,
4501 NumExpansions)) {
4502 AnyErrors = true;
4503 New->setInvalidDecl();
4504 continue;
4505 }
4506 assert(ShouldExpand && "Partial instantiation of base initializer?")(static_cast <bool> (ShouldExpand && "Partial instantiation of base initializer?"
) ? void (0) : __assert_fail ("ShouldExpand && \"Partial instantiation of base initializer?\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4506, __extension__ __PRETTY_FUNCTION__));
4507
4508 // Loop over all of the arguments in the argument pack(s),
4509 for (unsigned I = 0; I != *NumExpansions; ++I) {
4510 Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(*this, I);
4511
4512 // Instantiate the initializer.
4513 ExprResult TempInit = SubstInitializer(Init->getInit(), TemplateArgs,
4514 /*CXXDirectInit=*/true);
4515 if (TempInit.isInvalid()) {
4516 AnyErrors = true;
4517 break;
4518 }
4519
4520 // Instantiate the base type.
4521 TypeSourceInfo *BaseTInfo = SubstType(Init->getTypeSourceInfo(),
4522 TemplateArgs,
4523 Init->getSourceLocation(),
4524 New->getDeclName());
4525 if (!BaseTInfo) {
4526 AnyErrors = true;
4527 break;
4528 }
4529
4530 // Build the initializer.
4531 MemInitResult NewInit = BuildBaseInitializer(BaseTInfo->getType(),
4532 BaseTInfo, TempInit.get(),
4533 New->getParent(),
4534 SourceLocation());
4535 if (NewInit.isInvalid()) {
4536 AnyErrors = true;
4537 break;
4538 }
4539
4540 NewInits.push_back(NewInit.get());
4541 }
4542
4543 continue;
4544 }
4545
4546 // Instantiate the initializer.
4547 ExprResult TempInit = SubstInitializer(Init->getInit(), TemplateArgs,
4548 /*CXXDirectInit=*/true);
4549 if (TempInit.isInvalid()) {
4550 AnyErrors = true;
4551 continue;
4552 }
4553
4554 MemInitResult NewInit;
4555 if (Init->isDelegatingInitializer() || Init->isBaseInitializer()) {
4556 TypeSourceInfo *TInfo = SubstType(Init->getTypeSourceInfo(),
4557 TemplateArgs,
4558 Init->getSourceLocation(),
4559 New->getDeclName());
4560 if (!TInfo) {
4561 AnyErrors = true;
4562 New->setInvalidDecl();
4563 continue;
4564 }
4565
4566 if (Init->isBaseInitializer())
4567 NewInit = BuildBaseInitializer(TInfo->getType(), TInfo, TempInit.get(),
4568 New->getParent(), EllipsisLoc);
4569 else
4570 NewInit = BuildDelegatingInitializer(TInfo, TempInit.get(),
4571 cast<CXXRecordDecl>(CurContext->getParent()));
4572 } else if (Init->isMemberInitializer()) {
4573 FieldDecl *Member = cast_or_null<FieldDecl>(FindInstantiatedDecl(
4574 Init->getMemberLocation(),
4575 Init->getMember(),
4576 TemplateArgs));
4577 if (!Member) {
4578 AnyErrors = true;
4579 New->setInvalidDecl();
4580 continue;
4581 }
4582
4583 NewInit = BuildMemberInitializer(Member, TempInit.get(),
4584 Init->getSourceLocation());
4585 } else if (Init->isIndirectMemberInitializer()) {
4586 IndirectFieldDecl *IndirectMember =
4587 cast_or_null<IndirectFieldDecl>(FindInstantiatedDecl(
4588 Init->getMemberLocation(),
4589 Init->getIndirectMember(), TemplateArgs));
4590
4591 if (!IndirectMember) {
4592 AnyErrors = true;
4593 New->setInvalidDecl();
4594 continue;
4595 }
4596
4597 NewInit = BuildMemberInitializer(IndirectMember, TempInit.get(),
4598 Init->getSourceLocation());
4599 }
4600
4601 if (NewInit.isInvalid()) {
4602 AnyErrors = true;
4603 New->setInvalidDecl();
4604 } else {
4605 NewInits.push_back(NewInit.get());
4606 }
4607 }
4608
4609 // Assign all the initializers to the new constructor.
4610 ActOnMemInitializers(New,
4611 /*FIXME: ColonLoc */
4612 SourceLocation(),
4613 NewInits,
4614 AnyErrors);
4615}
4616
4617// TODO: this could be templated if the various decl types used the
4618// same method name.
4619static bool isInstantiationOf(ClassTemplateDecl *Pattern,
4620 ClassTemplateDecl *Instance) {
4621 Pattern = Pattern->getCanonicalDecl();
4622
4623 do {
4624 Instance = Instance->getCanonicalDecl();
4625 if (Pattern == Instance) return true;
4626 Instance = Instance->getInstantiatedFromMemberTemplate();
4627 } while (Instance);
4628
4629 return false;
4630}
4631
4632static bool isInstantiationOf(FunctionTemplateDecl *Pattern,
4633 FunctionTemplateDecl *Instance) {
4634 Pattern = Pattern->getCanonicalDecl();
4635
4636 do {
4637 Instance = Instance->getCanonicalDecl();
4638 if (Pattern == Instance) return true;
4639 Instance = Instance->getInstantiatedFromMemberTemplate();
4640 } while (Instance);
4641
4642 return false;
4643}
4644
4645static bool
4646isInstantiationOf(ClassTemplatePartialSpecializationDecl *Pattern,
4647 ClassTemplatePartialSpecializationDecl *Instance) {
4648 Pattern
4649 = cast<ClassTemplatePartialSpecializationDecl>(Pattern->getCanonicalDecl());
4650 do {
4651 Instance = cast<ClassTemplatePartialSpecializationDecl>(
4652 Instance->getCanonicalDecl());
4653 if (Pattern == Instance)
4654 return true;
4655 Instance = Instance->getInstantiatedFromMember();
4656 } while (Instance);
4657
4658 return false;
4659}
4660
4661static bool isInstantiationOf(CXXRecordDecl *Pattern,
4662 CXXRecordDecl *Instance) {
4663 Pattern = Pattern->getCanonicalDecl();
4664
4665 do {
4666 Instance = Instance->getCanonicalDecl();
4667 if (Pattern == Instance) return true;
4668 Instance = Instance->getInstantiatedFromMemberClass();
4669 } while (Instance);
4670
4671 return false;
4672}
4673
4674static bool isInstantiationOf(FunctionDecl *Pattern,
4675 FunctionDecl *Instance) {
4676 Pattern = Pattern->getCanonicalDecl();
4677
4678 do {
4679 Instance = Instance->getCanonicalDecl();
4680 if (Pattern == Instance) return true;
4681 Instance = Instance->getInstantiatedFromMemberFunction();
4682 } while (Instance);
4683
4684 return false;
4685}
4686
4687static bool isInstantiationOf(EnumDecl *Pattern,
4688 EnumDecl *Instance) {
4689 Pattern = Pattern->getCanonicalDecl();
4690
4691 do {
4692 Instance = Instance->getCanonicalDecl();
4693 if (Pattern == Instance) return true;
4694 Instance = Instance->getInstantiatedFromMemberEnum();
4695 } while (Instance);
4696
4697 return false;
4698}
4699
4700static bool isInstantiationOf(UsingShadowDecl *Pattern,
4701 UsingShadowDecl *Instance,
4702 ASTContext &C) {
4703 return declaresSameEntity(C.getInstantiatedFromUsingShadowDecl(Instance),
4704 Pattern);
4705}
4706
4707static bool isInstantiationOf(UsingDecl *Pattern, UsingDecl *Instance,
4708 ASTContext &C) {
4709 return declaresSameEntity(C.getInstantiatedFromUsingDecl(Instance), Pattern);
4710}
4711
4712template<typename T>
4713static bool isInstantiationOfUnresolvedUsingDecl(T *Pattern, Decl *Other,
4714 ASTContext &Ctx) {
4715 // An unresolved using declaration can instantiate to an unresolved using
4716 // declaration, or to a using declaration or a using declaration pack.
4717 //
4718 // Multiple declarations can claim to be instantiated from an unresolved
4719 // using declaration if it's a pack expansion. We want the UsingPackDecl
4720 // in that case, not the individual UsingDecls within the pack.
4721 bool OtherIsPackExpansion;
4722 NamedDecl *OtherFrom;
4723 if (auto *OtherUUD = dyn_cast<T>(Other)) {
4724 OtherIsPackExpansion = OtherUUD->isPackExpansion();
4725 OtherFrom = Ctx.getInstantiatedFromUsingDecl(OtherUUD);
4726 } else if (auto *OtherUPD = dyn_cast<UsingPackDecl>(Other)) {
4727 OtherIsPackExpansion = true;
4728 OtherFrom = OtherUPD->getInstantiatedFromUsingDecl();
4729 } else if (auto *OtherUD = dyn_cast<UsingDecl>(Other)) {
4730 OtherIsPackExpansion = false;
4731 OtherFrom = Ctx.getInstantiatedFromUsingDecl(OtherUD);
4732 } else {
4733 return false;
4734 }
4735 return Pattern->isPackExpansion() == OtherIsPackExpansion &&
4736 declaresSameEntity(OtherFrom, Pattern);
4737}
4738
4739static bool isInstantiationOfStaticDataMember(VarDecl *Pattern,
4740 VarDecl *Instance) {
4741 assert(Instance->isStaticDataMember())(static_cast <bool> (Instance->isStaticDataMember())
? void (0) : __assert_fail ("Instance->isStaticDataMember()"
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4741, __extension__ __PRETTY_FUNCTION__));
4742
4743 Pattern = Pattern->getCanonicalDecl();
4744
4745 do {
4746 Instance = Instance->getCanonicalDecl();
4747 if (Pattern == Instance) return true;
4748 Instance = Instance->getInstantiatedFromStaticDataMember();
4749 } while (Instance);
4750
4751 return false;
4752}
4753
4754// Other is the prospective instantiation
4755// D is the prospective pattern
4756static bool isInstantiationOf(ASTContext &Ctx, NamedDecl *D, Decl *Other) {
4757 if (auto *UUD = dyn_cast<UnresolvedUsingTypenameDecl>(D))
4758 return isInstantiationOfUnresolvedUsingDecl(UUD, Other, Ctx);
4759
4760 if (auto *UUD = dyn_cast<UnresolvedUsingValueDecl>(D))
4761 return isInstantiationOfUnresolvedUsingDecl(UUD, Other, Ctx);
4762
4763 if (D->getKind() != Other->getKind())
4764 return false;
4765
4766 if (auto *Record = dyn_cast<CXXRecordDecl>(Other))
4767 return isInstantiationOf(cast<CXXRecordDecl>(D), Record);
4768
4769 if (auto *Function = dyn_cast<FunctionDecl>(Other))
4770 return isInstantiationOf(cast<FunctionDecl>(D), Function);
4771
4772 if (auto *Enum = dyn_cast<EnumDecl>(Other))
4773 return isInstantiationOf(cast<EnumDecl>(D), Enum);
4774
4775 if (auto *Var = dyn_cast<VarDecl>(Other))
4776 if (Var->isStaticDataMember())
4777 return isInstantiationOfStaticDataMember(cast<VarDecl>(D), Var);
4778
4779 if (auto *Temp = dyn_cast<ClassTemplateDecl>(Other))
4780 return isInstantiationOf(cast<ClassTemplateDecl>(D), Temp);
4781
4782 if (auto *Temp = dyn_cast<FunctionTemplateDecl>(Other))
4783 return isInstantiationOf(cast<FunctionTemplateDecl>(D), Temp);
4784
4785 if (auto *PartialSpec =
4786 dyn_cast<ClassTemplatePartialSpecializationDecl>(Other))
4787 return isInstantiationOf(cast<ClassTemplatePartialSpecializationDecl>(D),
4788 PartialSpec);
4789
4790 if (auto *Field = dyn_cast<FieldDecl>(Other)) {
4791 if (!Field->getDeclName()) {
4792 // This is an unnamed field.
4793 return declaresSameEntity(Ctx.getInstantiatedFromUnnamedFieldDecl(Field),
4794 cast<FieldDecl>(D));
4795 }
4796 }
4797
4798 if (auto *Using = dyn_cast<UsingDecl>(Other))
4799 return isInstantiationOf(cast<UsingDecl>(D), Using, Ctx);
4800
4801 if (auto *Shadow = dyn_cast<UsingShadowDecl>(Other))
4802 return isInstantiationOf(cast<UsingShadowDecl>(D), Shadow, Ctx);
4803
4804 return D->getDeclName() &&
4805 D->getDeclName() == cast<NamedDecl>(Other)->getDeclName();
4806}
4807
4808template<typename ForwardIterator>
4809static NamedDecl *findInstantiationOf(ASTContext &Ctx,
4810 NamedDecl *D,
4811 ForwardIterator first,
4812 ForwardIterator last) {
4813 for (; first != last; ++first)
4814 if (isInstantiationOf(Ctx, D, *first))
4815 return cast<NamedDecl>(*first);
4816
4817 return nullptr;
4818}
4819
4820/// \brief Finds the instantiation of the given declaration context
4821/// within the current instantiation.
4822///
4823/// \returns NULL if there was an error
4824DeclContext *Sema::FindInstantiatedContext(SourceLocation Loc, DeclContext* DC,
4825 const MultiLevelTemplateArgumentList &TemplateArgs) {
4826 if (NamedDecl *D = dyn_cast<NamedDecl>(DC)) {
4827 Decl* ID = FindInstantiatedDecl(Loc, D, TemplateArgs, true);
4828 return cast_or_null<DeclContext>(ID);
4829 } else return DC;
4830}
4831
4832/// \brief Find the instantiation of the given declaration within the
4833/// current instantiation.
4834///
4835/// This routine is intended to be used when \p D is a declaration
4836/// referenced from within a template, that needs to mapped into the
4837/// corresponding declaration within an instantiation. For example,
4838/// given:
4839///
4840/// \code
4841/// template<typename T>
4842/// struct X {
4843/// enum Kind {
4844/// KnownValue = sizeof(T)
4845/// };
4846///
4847/// bool getKind() const { return KnownValue; }
4848/// };
4849///
4850/// template struct X<int>;
4851/// \endcode
4852///
4853/// In the instantiation of <tt>X<int>::getKind()</tt>, we need to map the
4854/// \p EnumConstantDecl for \p KnownValue (which refers to
4855/// <tt>X<T>::<Kind>::KnownValue</tt>) to its instantiation
4856/// (<tt>X<int>::<Kind>::KnownValue</tt>). \p FindInstantiatedDecl performs
4857/// this mapping from within the instantiation of <tt>X<int></tt>.
4858NamedDecl *Sema::FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D,
4859 const MultiLevelTemplateArgumentList &TemplateArgs,
4860 bool FindingInstantiatedContext) {
4861 DeclContext *ParentDC = D->getDeclContext();
4862 // FIXME: Parmeters of pointer to functions (y below) that are themselves
4863 // parameters (p below) can have their ParentDC set to the translation-unit
4864 // - thus we can not consistently check if the ParentDC of such a parameter
4865 // is Dependent or/and a FunctionOrMethod.
4866 // For e.g. this code, during Template argument deduction tries to
4867 // find an instantiated decl for (T y) when the ParentDC for y is
4868 // the translation unit.
4869 // e.g. template <class T> void Foo(auto (*p)(T y) -> decltype(y())) {}
4870 // float baz(float(*)()) { return 0.0; }
4871 // Foo(baz);
4872 // The better fix here is perhaps to ensure that a ParmVarDecl, by the time
4873 // it gets here, always has a FunctionOrMethod as its ParentDC??
4874 // For now:
4875 // - as long as we have a ParmVarDecl whose parent is non-dependent and
4876 // whose type is not instantiation dependent, do nothing to the decl
4877 // - otherwise find its instantiated decl.
4878 if (isa<ParmVarDecl>(D) && !ParentDC->isDependentContext() &&
4879 !cast<ParmVarDecl>(D)->getType()->isInstantiationDependentType())
4880 return D;
4881 if (isa<ParmVarDecl>(D) || isa<NonTypeTemplateParmDecl>(D) ||
4882 isa<TemplateTypeParmDecl>(D) || isa<TemplateTemplateParmDecl>(D) ||
4883 (ParentDC->isFunctionOrMethod() && ParentDC->isDependentContext()) ||
4884 (isa<CXXRecordDecl>(D) && cast<CXXRecordDecl>(D)->isLambda())) {
4885 // D is a local of some kind. Look into the map of local
4886 // declarations to their instantiations.
4887 if (CurrentInstantiationScope) {
4888 if (auto Found = CurrentInstantiationScope->findInstantiationOf(D)) {
4889 if (Decl *FD = Found->dyn_cast<Decl *>())
4890 return cast<NamedDecl>(FD);
4891
4892 int PackIdx = ArgumentPackSubstitutionIndex;
4893 assert(PackIdx != -1 &&(static_cast <bool> (PackIdx != -1 && "found declaration pack but not pack expanding"
) ? void (0) : __assert_fail ("PackIdx != -1 && \"found declaration pack but not pack expanding\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4894, __extension__ __PRETTY_FUNCTION__))
4894 "found declaration pack but not pack expanding")(static_cast <bool> (PackIdx != -1 && "found declaration pack but not pack expanding"
) ? void (0) : __assert_fail ("PackIdx != -1 && \"found declaration pack but not pack expanding\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4894, __extension__ __PRETTY_FUNCTION__));
4895 typedef LocalInstantiationScope::DeclArgumentPack DeclArgumentPack;
4896 return cast<NamedDecl>((*Found->get<DeclArgumentPack *>())[PackIdx]);
4897 }
4898 }
4899
4900 // If we're performing a partial substitution during template argument
4901 // deduction, we may not have values for template parameters yet. They
4902 // just map to themselves.
4903 if (isa<NonTypeTemplateParmDecl>(D) || isa<TemplateTypeParmDecl>(D) ||
4904 isa<TemplateTemplateParmDecl>(D))
4905 return D;
4906
4907 if (D->isInvalidDecl())
4908 return nullptr;
4909
4910 // Normally this function only searches for already instantiated declaration
4911 // however we have to make an exclusion for local types used before
4912 // definition as in the code:
4913 //
4914 // template<typename T> void f1() {
4915 // void g1(struct x1);
4916 // struct x1 {};
4917 // }
4918 //
4919 // In this case instantiation of the type of 'g1' requires definition of
4920 // 'x1', which is defined later. Error recovery may produce an enum used
4921 // before definition. In these cases we need to instantiate relevant
4922 // declarations here.
4923 bool NeedInstantiate = false;
4924 if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D))
4925 NeedInstantiate = RD->isLocalClass();
4926 else
4927 NeedInstantiate = isa<EnumDecl>(D);
4928 if (NeedInstantiate) {
4929 Decl *Inst = SubstDecl(D, CurContext, TemplateArgs);
4930 CurrentInstantiationScope->InstantiatedLocal(D, Inst);
4931 return cast<TypeDecl>(Inst);
4932 }
4933
4934 // If we didn't find the decl, then we must have a label decl that hasn't
4935 // been found yet. Lazily instantiate it and return it now.
4936 assert(isa<LabelDecl>(D))(static_cast <bool> (isa<LabelDecl>(D)) ? void (0
) : __assert_fail ("isa<LabelDecl>(D)", "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4936, __extension__ __PRETTY_FUNCTION__));
4937
4938 Decl *Inst = SubstDecl(D, CurContext, TemplateArgs);
4939 assert(Inst && "Failed to instantiate label??")(static_cast <bool> (Inst && "Failed to instantiate label??"
) ? void (0) : __assert_fail ("Inst && \"Failed to instantiate label??\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 4939, __extension__ __PRETTY_FUNCTION__));
4940
4941 CurrentInstantiationScope->InstantiatedLocal(D, Inst);
4942 return cast<LabelDecl>(Inst);
4943 }
4944
4945 // For variable template specializations, update those that are still
4946 // type-dependent.
4947 if (VarTemplateSpecializationDecl *VarSpec =
4948 dyn_cast<VarTemplateSpecializationDecl>(D)) {
4949 bool InstantiationDependent = false;
4950 const TemplateArgumentListInfo &VarTemplateArgs =
4951 VarSpec->getTemplateArgsInfo();
4952 if (TemplateSpecializationType::anyDependentTemplateArguments(
4953 VarTemplateArgs, InstantiationDependent))
4954 D = cast<NamedDecl>(
4955 SubstDecl(D, VarSpec->getDeclContext(), TemplateArgs));
4956 return D;
4957 }
4958
4959 if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(D)) {
4960 if (!Record->isDependentContext())
4961 return D;
4962
4963 // Determine whether this record is the "templated" declaration describing
4964 // a class template or class template partial specialization.
4965 ClassTemplateDecl *ClassTemplate = Record->getDescribedClassTemplate();
4966 if (ClassTemplate)
4967 ClassTemplate = ClassTemplate->getCanonicalDecl();
4968 else if (ClassTemplatePartialSpecializationDecl *PartialSpec
4969 = dyn_cast<ClassTemplatePartialSpecializationDecl>(Record))
4970 ClassTemplate = PartialSpec->getSpecializedTemplate()->getCanonicalDecl();
4971
4972 // Walk the current context to find either the record or an instantiation of
4973 // it.
4974 DeclContext *DC = CurContext;
4975 while (!DC->isFileContext()) {
4976 // If we're performing substitution while we're inside the template
4977 // definition, we'll find our own context. We're done.
4978 if (DC->Equals(Record))
4979 return Record;
4980
4981 if (CXXRecordDecl *InstRecord = dyn_cast<CXXRecordDecl>(DC)) {
4982 // Check whether we're in the process of instantiating a class template
4983 // specialization of the template we're mapping.
4984 if (ClassTemplateSpecializationDecl *InstSpec
4985 = dyn_cast<ClassTemplateSpecializationDecl>(InstRecord)){
4986 ClassTemplateDecl *SpecTemplate = InstSpec->getSpecializedTemplate();
4987 if (ClassTemplate && isInstantiationOf(ClassTemplate, SpecTemplate))
4988 return InstRecord;
4989 }
4990
4991 // Check whether we're in the process of instantiating a member class.
4992 if (isInstantiationOf(Record, InstRecord))
4993 return InstRecord;
4994 }
4995
4996 // Move to the outer template scope.
4997 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(DC)) {
4998 if (FD->getFriendObjectKind() && FD->getDeclContext()->isFileContext()){
4999 DC = FD->getLexicalDeclContext();
5000 continue;
5001 }
5002 // An implicit deduction guide acts as if it's within the class template
5003 // specialization described by its name and first N template params.
5004 auto *Guide = dyn_cast<CXXDeductionGuideDecl>(FD);
5005 if (Guide && Guide->isImplicit()) {
5006 TemplateDecl *TD = Guide->getDeducedTemplate();
5007 // Convert the arguments to an "as-written" list.
5008 TemplateArgumentListInfo Args(Loc, Loc);
5009 for (TemplateArgument Arg : TemplateArgs.getInnermost().take_front(
5010 TD->getTemplateParameters()->size())) {
5011 ArrayRef<TemplateArgument> Unpacked(Arg);
5012 if (Arg.getKind() == TemplateArgument::Pack)
5013 Unpacked = Arg.pack_elements();
5014 for (TemplateArgument UnpackedArg : Unpacked)
5015 Args.addArgument(
5016 getTrivialTemplateArgumentLoc(UnpackedArg, QualType(), Loc));
5017 }
5018 QualType T = CheckTemplateIdType(TemplateName(TD), Loc, Args);
5019 if (T.isNull())
5020 return nullptr;
5021 auto *SubstRecord = T->getAsCXXRecordDecl();
5022 assert(SubstRecord && "class template id not a class type?")(static_cast <bool> (SubstRecord && "class template id not a class type?"
) ? void (0) : __assert_fail ("SubstRecord && \"class template id not a class type?\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 5022, __extension__ __PRETTY_FUNCTION__));
5023 // Check that this template-id names the primary template and not a
5024 // partial or explicit specialization. (In the latter cases, it's
5025 // meaningless to attempt to find an instantiation of D within the
5026 // specialization.)
5027 // FIXME: The standard doesn't say what should happen here.
5028 if (FindingInstantiatedContext &&
5029 usesPartialOrExplicitSpecialization(
5030 Loc, cast<ClassTemplateSpecializationDecl>(SubstRecord))) {
5031 Diag(Loc, diag::err_specialization_not_primary_template)
5032 << T << (SubstRecord->getTemplateSpecializationKind() ==
5033 TSK_ExplicitSpecialization);
5034 return nullptr;
5035 }
5036 DC = SubstRecord;
5037 continue;
5038 }
5039 }
5040
5041 DC = DC->getParent();
5042 }
5043
5044 // Fall through to deal with other dependent record types (e.g.,
5045 // anonymous unions in class templates).
5046 }
5047
5048 if (!ParentDC->isDependentContext())
5049 return D;
5050
5051 ParentDC = FindInstantiatedContext(Loc, ParentDC, TemplateArgs);
5052 if (!ParentDC)
5053 return nullptr;
5054
5055 if (ParentDC != D->getDeclContext()) {
5056 // We performed some kind of instantiation in the parent context,
5057 // so now we need to look into the instantiated parent context to
5058 // find the instantiation of the declaration D.
5059
5060 // If our context used to be dependent, we may need to instantiate
5061 // it before performing lookup into that context.
5062 bool IsBeingInstantiated = false;
5063 if (CXXRecordDecl *Spec = dyn_cast<CXXRecordDecl>(ParentDC)) {
5064 if (!Spec->isDependentContext()) {
5065 QualType T = Context.getTypeDeclType(Spec);
5066 const RecordType *Tag = T->getAs<RecordType>();
5067 assert(Tag && "type of non-dependent record is not a RecordType")(static_cast <bool> (Tag && "type of non-dependent record is not a RecordType"
) ? void (0) : __assert_fail ("Tag && \"type of non-dependent record is not a RecordType\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 5067, __extension__ __PRETTY_FUNCTION__));
5068 if (Tag->isBeingDefined())
5069 IsBeingInstantiated = true;
5070 if (!Tag->isBeingDefined() &&
5071 RequireCompleteType(Loc, T, diag::err_incomplete_type))
5072 return nullptr;
5073
5074 ParentDC = Tag->getDecl();
5075 }
5076 }
5077
5078 NamedDecl *Result = nullptr;
5079 // FIXME: If the name is a dependent name, this lookup won't necessarily
5080 // find it. Does that ever matter?
5081 if (auto Name = D->getDeclName()) {
5082 DeclarationNameInfo NameInfo(Name, D->getLocation());
5083 Name = SubstDeclarationNameInfo(NameInfo, TemplateArgs).getName();
5084 if (!Name)
5085 return nullptr;
5086 DeclContext::lookup_result Found = ParentDC->lookup(Name);
5087 Result = findInstantiationOf(Context, D, Found.begin(), Found.end());
5088 } else {
5089 // Since we don't have a name for the entity we're looking for,
5090 // our only option is to walk through all of the declarations to
5091 // find that name. This will occur in a few cases:
5092 //
5093 // - anonymous struct/union within a template
5094 // - unnamed class/struct/union/enum within a template
5095 //
5096 // FIXME: Find a better way to find these instantiations!
5097 Result = findInstantiationOf(Context, D,
5098 ParentDC->decls_begin(),
5099 ParentDC->decls_end());
5100 }
5101
5102 if (!Result) {
5103 if (isa<UsingShadowDecl>(D)) {
5104 // UsingShadowDecls can instantiate to nothing because of using hiding.
5105 } else if (Diags.hasErrorOccurred()) {
5106 // We've already complained about something, so most likely this
5107 // declaration failed to instantiate. There's no point in complaining
5108 // further, since this is normal in invalid code.
5109 } else if (IsBeingInstantiated) {
5110 // The class in which this member exists is currently being
5111 // instantiated, and we haven't gotten around to instantiating this
5112 // member yet. This can happen when the code uses forward declarations
5113 // of member classes, and introduces ordering dependencies via
5114 // template instantiation.
5115 Diag(Loc, diag::err_member_not_yet_instantiated)
5116 << D->getDeclName()
5117 << Context.getTypeDeclType(cast<CXXRecordDecl>(ParentDC));
5118 Diag(D->getLocation(), diag::note_non_instantiated_member_here);
5119 } else if (EnumConstantDecl *ED = dyn_cast<EnumConstantDecl>(D)) {
5120 // This enumeration constant was found when the template was defined,
5121 // but can't be found in the instantiation. This can happen if an
5122 // unscoped enumeration member is explicitly specialized.
5123 EnumDecl *Enum = cast<EnumDecl>(ED->getLexicalDeclContext());
5124 EnumDecl *Spec = cast<EnumDecl>(FindInstantiatedDecl(Loc, Enum,
5125 TemplateArgs));
5126 assert(Spec->getTemplateSpecializationKind() ==(static_cast <bool> (Spec->getTemplateSpecializationKind
() == TSK_ExplicitSpecialization) ? void (0) : __assert_fail (
"Spec->getTemplateSpecializationKind() == TSK_ExplicitSpecialization"
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 5127, __extension__ __PRETTY_FUNCTION__))
5127 TSK_ExplicitSpecialization)(static_cast <bool> (Spec->getTemplateSpecializationKind
() == TSK_ExplicitSpecialization) ? void (0) : __assert_fail (
"Spec->getTemplateSpecializationKind() == TSK_ExplicitSpecialization"
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 5127, __extension__ __PRETTY_FUNCTION__));
5128 Diag(Loc, diag::err_enumerator_does_not_exist)
5129 << D->getDeclName()
5130 << Context.getTypeDeclType(cast<TypeDecl>(Spec->getDeclContext()));
5131 Diag(Spec->getLocation(), diag::note_enum_specialized_here)
5132 << Context.getTypeDeclType(Spec);
5133 } else {
5134 // We should have found something, but didn't.
5135 llvm_unreachable("Unable to find instantiation of declaration!")::llvm::llvm_unreachable_internal("Unable to find instantiation of declaration!"
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 5135);
5136 }
5137 }
5138
5139 D = Result;
5140 }
5141
5142 return D;
5143}
5144
5145/// \brief Performs template instantiation for all implicit template
5146/// instantiations we have seen until this point.
5147void Sema::PerformPendingInstantiations(bool LocalOnly) {
5148 while (!PendingLocalImplicitInstantiations.empty() ||
22
←
Assuming the condition is false
→
24
←
Loop condition is true. Entering loop body
→
54
←
Assuming the condition is false
→
56
←
Loop condition is true. Entering loop body
→
86
←
Assuming the condition is false
→
88
←
Loop condition is true. Entering loop body
→
118
←
Assuming the condition is false
→
120
←
Loop condition is true. Entering loop body
→
5149 (!LocalOnly && !PendingInstantiations.empty())) {
23
←
Assuming the condition is true
→
55
←
Assuming the condition is true
→
87
←
Assuming the condition is true
→
119
←
Assuming the condition is true
→
5150 PendingImplicitInstantiation Inst;
5151
5152 if (PendingLocalImplicitInstantiations.empty()) {
25
←
Assuming the condition is false
→
26
←
Taking false branch
→
57
←
Assuming the condition is false
→
58
←
Taking false branch
→
89
←
Assuming the condition is false
→
90
←
Taking false branch
→
121
←
Assuming the condition is false
→
122
←
Taking false branch
→
5153 Inst = PendingInstantiations.front();
5154 PendingInstantiations.pop_front();
5155 } else {
5156 Inst = PendingLocalImplicitInstantiations.front();
5157 PendingLocalImplicitInstantiations.pop_front();
5158 }
5159
5160 // Instantiate function definitions
5161 if (FunctionDecl *Function = dyn_cast<FunctionDecl>(Inst.first)) {
27
←
Taking false branch
→
59
←
Taking false branch
→
91
←
Taking false branch
→
123
←
Taking false branch
→
5162 bool DefinitionRequired = Function->getTemplateSpecializationKind() ==
5163 TSK_ExplicitInstantiationDefinition;
5164 InstantiateFunctionDefinition(/*FIXME:*/Inst.second, Function, true,
5165 DefinitionRequired, true);
5166 if (Function->isDefined())
5167 Function->setInstantiationIsPending(false);
5168 continue;
5169 }
5170
5171 // Instantiate variable definitions
5172 VarDecl *Var = cast<VarDecl>(Inst.first);
5173
5174 assert((Var->isStaticDataMember() ||(static_cast <bool> ((Var->isStaticDataMember() || isa
<VarTemplateSpecializationDecl>(Var)) && "Not a static data member, nor a variable template"
" specialization?") ? void (0) : __assert_fail ("(Var->isStaticDataMember() || isa<VarTemplateSpecializationDecl>(Var)) && \"Not a static data member, nor a variable template\" \" specialization?\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 5177, __extension__ __PRETTY_FUNCTION__))
5175 isa<VarTemplateSpecializationDecl>(Var)) &&(static_cast <bool> ((Var->isStaticDataMember() || isa
<VarTemplateSpecializationDecl>(Var)) && "Not a static data member, nor a variable template"
" specialization?") ? void (0) : __assert_fail ("(Var->isStaticDataMember() || isa<VarTemplateSpecializationDecl>(Var)) && \"Not a static data member, nor a variable template\" \" specialization?\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 5177, __extension__ __PRETTY_FUNCTION__))
5176 "Not a static data member, nor a variable template"(static_cast <bool> ((Var->isStaticDataMember() || isa
<VarTemplateSpecializationDecl>(Var)) && "Not a static data member, nor a variable template"
" specialization?") ? void (0) : __assert_fail ("(Var->isStaticDataMember() || isa<VarTemplateSpecializationDecl>(Var)) && \"Not a static data member, nor a variable template\" \" specialization?\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 5177, __extension__ __PRETTY_FUNCTION__))
5177 " specialization?")(static_cast <bool> ((Var->isStaticDataMember() || isa
<VarTemplateSpecializationDecl>(Var)) && "Not a static data member, nor a variable template"
" specialization?") ? void (0) : __assert_fail ("(Var->isStaticDataMember() || isa<VarTemplateSpecializationDecl>(Var)) && \"Not a static data member, nor a variable template\" \" specialization?\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 5177, __extension__ __PRETTY_FUNCTION__));
5178
5179 // Don't try to instantiate declarations if the most recent redeclaration
5180 // is invalid.
5181 if (Var->getMostRecentDecl()->isInvalidDecl())
28
←
Assuming the condition is false
→
29
←
Taking false branch
→
60
←
Assuming the condition is false
→
61
←
Taking false branch
→
92
←
Assuming the condition is false
→
93
←
Taking false branch
→
124
←
Assuming the condition is false
→
125
←
Taking false branch
→
5182 continue;
5183
5184 // Check if the most recent declaration has changed the specialization kind
5185 // and removed the need for implicit instantiation.
5186 switch (Var->getMostRecentDecl()->getTemplateSpecializationKind()) {
30
←
Control jumps to 'case TSK_ImplicitInstantiation:' at line 5196
→
62
←
Control jumps to 'case TSK_ImplicitInstantiation:' at line 5196
→
94
←
Control jumps to 'case TSK_ImplicitInstantiation:' at line 5196
→
126
←
Control jumps to 'case TSK_ImplicitInstantiation:' at line 5196
→
5187 case TSK_Undeclared:
5188 llvm_unreachable("Cannot instantitiate an undeclared specialization.")::llvm::llvm_unreachable_internal("Cannot instantitiate an undeclared specialization."
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp"
, 5188);
5189 case TSK_ExplicitInstantiationDeclaration:
5190 case TSK_ExplicitSpecialization:
5191 continue; // No longer need to instantiate this type.
5192 case TSK_ExplicitInstantiationDefinition:
5193 // We only need an instantiation if the pending instantiation *is* the
5194 // explicit instantiation.
5195 if (Var != Var->getMostRecentDecl()) continue;
5196 case TSK_ImplicitInstantiation:
5197 break;
31
←
 Execution continues on line 5200
→
63
←
 Execution continues on line 5200
→
95
←
 Execution continues on line 5200
→
127
←
 Execution continues on line 5200
→
5198 }
5199
5200 PrettyDeclStackTraceEntry CrashInfo(*this, Var, SourceLocation(),
5201 "instantiating variable definition");
5202 bool DefinitionRequired = Var->getTemplateSpecializationKind() ==
32
←
Assuming the condition is false
→
64
←
Assuming the condition is false
→
96
←
Assuming the condition is false
→
128
←
Assuming the condition is false
→
5203 TSK_ExplicitInstantiationDefinition;
5204
5205 // Instantiate static data member definitions or variable template
5206 // specializations.
5207 InstantiateVariableDefinition(/*FIXME:*/ Inst.second, Var, true,
33
←
Calling 'Sema::InstantiateVariableDefinition'
→
53
←
Returning from 'Sema::InstantiateVariableDefinition'
→
65
←
Calling 'Sema::InstantiateVariableDefinition'
→
85
←
Returning from 'Sema::InstantiateVariableDefinition'
→
97
←
Calling 'Sema::InstantiateVariableDefinition'
→
117
←
Returning from 'Sema::InstantiateVariableDefinition'
→
129
←
Calling 'Sema::InstantiateVariableDefinition'
→
5208 DefinitionRequired, true);
5209 }
5210}
5211
5212void Sema::PerformDependentDiagnostics(const DeclContext *Pattern,
5213 const MultiLevelTemplateArgumentList &TemplateArgs) {
5214 for (auto DD : Pattern->ddiags()) {
5215 switch (DD->getKind()) {
5216 case DependentDiagnostic::Access:
5217 HandleDependentAccessCheck(*DD, TemplateArgs);
5218 break;
5219 }
5220 }
5221}
←

/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h

1//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file defines the Sema class, which performs semantic analysis and
11// builds ASTs.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_CLANG_SEMA_SEMA_H
16#define LLVM_CLANG_SEMA_SEMA_H
17
18#include "clang/AST/Attr.h"
19#include "clang/AST/Availability.h"
20#include "clang/AST/DeclarationName.h"
21#include "clang/AST/DeclTemplate.h"
22#include "clang/AST/Expr.h"
23#include "clang/AST/ExprObjC.h"
24#include "clang/AST/ExternalASTSource.h"
25#include "clang/AST/LocInfoType.h"
26#include "clang/AST/MangleNumberingContext.h"
27#include "clang/AST/NSAPI.h"
28#include "clang/AST/PrettyPrinter.h"
29#include "clang/AST/StmtCXX.h"
30#include "clang/AST/TypeLoc.h"
31#include "clang/AST/TypeOrdering.h"
32#include "clang/Basic/ExpressionTraits.h"
33#include "clang/Basic/LangOptions.h"
34#include "clang/Basic/Module.h"
35#include "clang/Basic/OpenMPKinds.h"
36#include "clang/Basic/PragmaKinds.h"
37#include "clang/Basic/Specifiers.h"
38#include "clang/Basic/TemplateKinds.h"
39#include "clang/Basic/TypeTraits.h"
40#include "clang/Sema/AnalysisBasedWarnings.h"
41#include "clang/Sema/CleanupInfo.h"
42#include "clang/Sema/DeclSpec.h"
43#include "clang/Sema/ExternalSemaSource.h"
44#include "clang/Sema/IdentifierResolver.h"
45#include "clang/Sema/ObjCMethodList.h"
46#include "clang/Sema/Ownership.h"
47#include "clang/Sema/Scope.h"
48#include "clang/Sema/ScopeInfo.h"
49#include "clang/Sema/TypoCorrection.h"
50#include "clang/Sema/Weak.h"
51#include "llvm/ADT/ArrayRef.h"
52#include "llvm/ADT/Optional.h"
53#include "llvm/ADT/SetVector.h"
54#include "llvm/ADT/SmallPtrSet.h"
55#include "llvm/ADT/SmallVector.h"
56#include "llvm/ADT/TinyPtrVector.h"
57#include <deque>
58#include <memory>
59#include <string>
60#include <vector>
61
62namespace llvm {
63 class APSInt;
64 template <typename ValueT> struct DenseMapInfo;
65 template <typename ValueT, typename ValueInfoT> class DenseSet;
66 class SmallBitVector;
67 struct InlineAsmIdentifierInfo;
68}
69
70namespace clang {
71 class ADLResult;
72 class ASTConsumer;
73 class ASTContext;
74 class ASTMutationListener;
75 class ASTReader;
76 class ASTWriter;
77 class ArrayType;
78 class AttributeList;
79 class BindingDecl;
80 class BlockDecl;
81 class CapturedDecl;
82 class CXXBasePath;
83 class CXXBasePaths;
84 class CXXBindTemporaryExpr;
85 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath;
86 class CXXConstructorDecl;
87 class CXXConversionDecl;
88 class CXXDeleteExpr;
89 class CXXDestructorDecl;
90 class CXXFieldCollector;
91 class CXXMemberCallExpr;
92 class CXXMethodDecl;
93 class CXXScopeSpec;
94 class CXXTemporary;
95 class CXXTryStmt;
96 class CallExpr;
97 class ClassTemplateDecl;
98 class ClassTemplatePartialSpecializationDecl;
99 class ClassTemplateSpecializationDecl;
100 class VarTemplatePartialSpecializationDecl;
101 class CodeCompleteConsumer;
102 class CodeCompletionAllocator;
103 class CodeCompletionTUInfo;
104 class CodeCompletionResult;
105 class CoroutineBodyStmt;
106 class Decl;
107 class DeclAccessPair;
108 class DeclContext;
109 class DeclRefExpr;
110 class DeclaratorDecl;
111 class DeducedTemplateArgument;
112 class DependentDiagnostic;
113 class DesignatedInitExpr;
114 class Designation;
115 class EnableIfAttr;
116 class EnumConstantDecl;
117 class Expr;
118 class ExtVectorType;
119 class FormatAttr;
120 class FriendDecl;
121 class FunctionDecl;
122 class FunctionProtoType;
123 class FunctionTemplateDecl;
124 class ImplicitConversionSequence;
125 typedef MutableArrayRef<ImplicitConversionSequence> ConversionSequenceList;
126 class InitListExpr;
127 class InitializationKind;
128 class InitializationSequence;
129 class InitializedEntity;
130 class IntegerLiteral;
131 class LabelStmt;
132 class LambdaExpr;
133 class LangOptions;
134 class LocalInstantiationScope;
135 class LookupResult;
136 class MacroInfo;
137 typedef ArrayRef<std::pair<IdentifierInfo *, SourceLocation>> ModuleIdPath;
138 class ModuleLoader;
139 class MultiLevelTemplateArgumentList;
140 class NamedDecl;
141 class ObjCCategoryDecl;
142 class ObjCCategoryImplDecl;
143 class ObjCCompatibleAliasDecl;
144 class ObjCContainerDecl;
145 class ObjCImplDecl;
146 class ObjCImplementationDecl;
147 class ObjCInterfaceDecl;
148 class ObjCIvarDecl;
149 template <class T> class ObjCList;
150 class ObjCMessageExpr;
151 class ObjCMethodDecl;
152 class ObjCPropertyDecl;
153 class ObjCProtocolDecl;
154 class OMPThreadPrivateDecl;
155 class OMPDeclareReductionDecl;
156 class OMPDeclareSimdDecl;
157 class OMPClause;
158 struct OverloadCandidate;
159 class OverloadCandidateSet;
160 class OverloadExpr;
161 class ParenListExpr;
162 class ParmVarDecl;
163 class Preprocessor;
164 class PseudoDestructorTypeStorage;
165 class PseudoObjectExpr;
166 class QualType;
167 class StandardConversionSequence;
168 class Stmt;
169 class StringLiteral;
170 class SwitchStmt;
171 class TemplateArgument;
172 class TemplateArgumentList;
173 class TemplateArgumentLoc;
174 class TemplateDecl;
175 class TemplateParameterList;
176 class TemplatePartialOrderingContext;
177 class TemplateTemplateParmDecl;
178 class Token;
179 class TypeAliasDecl;
180 class TypedefDecl;
181 class TypedefNameDecl;
182 class TypeLoc;
183 class TypoCorrectionConsumer;
184 class UnqualifiedId;
185 class UnresolvedLookupExpr;
186 class UnresolvedMemberExpr;
187 class UnresolvedSetImpl;
188 class UnresolvedSetIterator;
189 class UsingDecl;
190 class UsingShadowDecl;
191 class ValueDecl;
192 class VarDecl;
193 class VarTemplateSpecializationDecl;
194 class VisibilityAttr;
195 class VisibleDeclConsumer;
196 class IndirectFieldDecl;
197 struct DeductionFailureInfo;
198 class TemplateSpecCandidateSet;
199
200namespace sema {
201 class AccessedEntity;
202 class BlockScopeInfo;
203 class CapturedRegionScopeInfo;
204 class CapturingScopeInfo;
205 class CompoundScopeInfo;
206 class DelayedDiagnostic;
207 class DelayedDiagnosticPool;
208 class FunctionScopeInfo;
209 class LambdaScopeInfo;
210 class PossiblyUnreachableDiag;
211 class SemaPPCallbacks;
212 class TemplateDeductionInfo;
213}
214
215namespace threadSafety {
216 class BeforeSet;
217 void threadSafetyCleanup(BeforeSet* Cache);
218}
219
220// FIXME: No way to easily map from TemplateTypeParmTypes to
221// TemplateTypeParmDecls, so we have this horrible PointerUnion.
222typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>,
223 SourceLocation> UnexpandedParameterPack;
224
225/// Describes whether we've seen any nullability information for the given
226/// file.
227struct FileNullability {
228 /// The first pointer declarator (of any pointer kind) in the file that does
229 /// not have a corresponding nullability annotation.
230 SourceLocation PointerLoc;
231
232 /// The end location for the first pointer declarator in the file. Used for
233 /// placing fix-its.
234 SourceLocation PointerEndLoc;
235
236 /// Which kind of pointer declarator we saw.
237 uint8_t PointerKind;
238
239 /// Whether we saw any type nullability annotations in the given file.
240 bool SawTypeNullability = false;
241};
242
243/// A mapping from file IDs to a record of whether we've seen nullability
244/// information in that file.
245class FileNullabilityMap {
246 /// A mapping from file IDs to the nullability information for each file ID.
247 llvm::DenseMap<FileID, FileNullability> Map;
248
249 /// A single-element cache based on the file ID.
250 struct {
251 FileID File;
252 FileNullability Nullability;
253 } Cache;
254
255public:
256 FileNullability &operator[](FileID file) {
257 // Check the single-element cache.
258 if (file == Cache.File)
259 return Cache.Nullability;
260
261 // It's not in the single-element cache; flush the cache if we have one.
262 if (!Cache.File.isInvalid()) {
263 Map[Cache.File] = Cache.Nullability;
264 }
265
266 // Pull this entry into the cache.
267 Cache.File = file;
268 Cache.Nullability = Map[file];
269 return Cache.Nullability;
270 }
271};
272
273/// Sema - This implements semantic analysis and AST building for C.
274class Sema {
275 Sema(const Sema &) = delete;
276 void operator=(const Sema &) = delete;
277
278 ///\brief Source of additional semantic information.
279 ExternalSemaSource *ExternalSource;
280
281 ///\brief Whether Sema has generated a multiplexer and has to delete it.
282 bool isMultiplexExternalSource;
283
284 static bool mightHaveNonExternalLinkage(const DeclaratorDecl *FD);
285
286 bool isVisibleSlow(const NamedDecl *D);
287
288 /// Determine whether two declarations should be linked together, given that
289 /// the old declaration might not be visible and the new declaration might
290 /// not have external linkage.
291 bool shouldLinkPossiblyHiddenDecl(const NamedDecl *Old,
292 const NamedDecl *New) {
293 if (isVisible(Old))
294 return true;
295 // See comment in below overload for why it's safe to compute the linkage
296 // of the new declaration here.
297 if (New->isExternallyDeclarable()) {
298 assert(Old->isExternallyDeclarable() &&(static_cast <bool> (Old->isExternallyDeclarable() &&
"should not have found a non-externally-declarable previous decl"
) ? void (0) : __assert_fail ("Old->isExternallyDeclarable() && \"should not have found a non-externally-declarable previous decl\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 299, __extension__ __PRETTY_FUNCTION__))
299 "should not have found a non-externally-declarable previous decl")(static_cast <bool> (Old->isExternallyDeclarable() &&
"should not have found a non-externally-declarable previous decl"
) ? void (0) : __assert_fail ("Old->isExternallyDeclarable() && \"should not have found a non-externally-declarable previous decl\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 299, __extension__ __PRETTY_FUNCTION__));
300 return true;
301 }
302 return false;
303 }
304 bool shouldLinkPossiblyHiddenDecl(LookupResult &Old, const NamedDecl *New);
305
306public:
307 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy;
308 typedef OpaquePtr<TemplateName> TemplateTy;
309 typedef OpaquePtr<QualType> TypeTy;
310
311 OpenCLOptions OpenCLFeatures;
312 FPOptions FPFeatures;
313
314 const LangOptions &LangOpts;
315 Preprocessor &PP;
316 ASTContext &Context;
317 ASTConsumer &Consumer;
318 DiagnosticsEngine &Diags;
319 SourceManager &SourceMgr;
320
321 /// \brief Flag indicating whether or not to collect detailed statistics.
322 bool CollectStats;
323
324 /// \brief Code-completion consumer.
325 CodeCompleteConsumer *CodeCompleter;
326
327 /// CurContext - This is the current declaration context of parsing.
328 DeclContext *CurContext;
329
330 /// \brief Generally null except when we temporarily switch decl contexts,
331 /// like in \see ActOnObjCTemporaryExitContainerContext.
332 DeclContext *OriginalLexicalContext;
333
334 /// VAListTagName - The declaration name corresponding to __va_list_tag.
335 /// This is used as part of a hack to omit that class from ADL results.
336 DeclarationName VAListTagName;
337
338 bool MSStructPragmaOn; // True when \#pragma ms_struct on
339
340 /// \brief Controls member pointer representation format under the MS ABI.
341 LangOptions::PragmaMSPointersToMembersKind
342 MSPointerToMemberRepresentationMethod;
343
344 /// Stack of active SEH __finally scopes. Can be empty.
345 SmallVector<Scope*, 2> CurrentSEHFinally;
346
347 /// \brief Source location for newly created implicit MSInheritanceAttrs
348 SourceLocation ImplicitMSInheritanceAttrLoc;
349
350 /// \brief pragma clang section kind
351 enum PragmaClangSectionKind {
352 PCSK_Invalid = 0,
353 PCSK_BSS = 1,
354 PCSK_Data = 2,
355 PCSK_Rodata = 3,
356 PCSK_Text = 4
357 };
358
359 enum PragmaClangSectionAction {
360 PCSA_Set = 0,
361 PCSA_Clear = 1
362 };
363
364 struct PragmaClangSection {
365 std::string SectionName;
366 bool Valid = false;
367 SourceLocation PragmaLocation;
368
369 void Act(SourceLocation PragmaLocation,
370 PragmaClangSectionAction Action,
371 StringLiteral* Name);
372 };
373
374 PragmaClangSection PragmaClangBSSSection;
375 PragmaClangSection PragmaClangDataSection;
376 PragmaClangSection PragmaClangRodataSection;
377 PragmaClangSection PragmaClangTextSection;
378
379 enum PragmaMsStackAction {
380 PSK_Reset = 0x0, // #pragma ()
381 PSK_Set = 0x1, // #pragma (value)
382 PSK_Push = 0x2, // #pragma (push[, id])
383 PSK_Pop = 0x4, // #pragma (pop[, id])
384 PSK_Show = 0x8, // #pragma (show) -- only for "pack"!
385 PSK_Push_Set = PSK_Push | PSK_Set, // #pragma (push[, id], value)
386 PSK_Pop_Set = PSK_Pop | PSK_Set, // #pragma (pop[, id], value)
387 };
388
389 template<typename ValueType>
390 struct PragmaStack {
391 struct Slot {
392 llvm::StringRef StackSlotLabel;
393 ValueType Value;
394 SourceLocation PragmaLocation;
395 SourceLocation PragmaPushLocation;
396 Slot(llvm::StringRef StackSlotLabel, ValueType Value,
397 SourceLocation PragmaLocation, SourceLocation PragmaPushLocation)
398 : StackSlotLabel(StackSlotLabel), Value(Value),
399 PragmaLocation(PragmaLocation),
400 PragmaPushLocation(PragmaPushLocation) {}
401 };
402 void Act(SourceLocation PragmaLocation,
403 PragmaMsStackAction Action,
404 llvm::StringRef StackSlotLabel,
405 ValueType Value);
406
407 // MSVC seems to add artificial slots to #pragma stacks on entering a C++
408 // method body to restore the stacks on exit, so it works like this:
409 //
410 // struct S {
411 // #pragma <name>(push, InternalPragmaSlot, <current_pragma_value>)
412 // void Method {}
413 // #pragma <name>(pop, InternalPragmaSlot)
414 // };
415 //
416 // It works even with #pragma vtordisp, although MSVC doesn't support
417 // #pragma vtordisp(push [, id], n)
418 // syntax.
419 //
420 // Push / pop a named sentinel slot.
421 void SentinelAction(PragmaMsStackAction Action, StringRef Label) {
422 assert((Action == PSK_Push || Action == PSK_Pop) &&(static_cast <bool> ((Action == PSK_Push || Action == PSK_Pop
) && "Can only push / pop #pragma stack sentinels!") ?
void (0) : __assert_fail ("(Action == PSK_Push || Action == PSK_Pop) && \"Can only push / pop #pragma stack sentinels!\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 423, __extension__ __PRETTY_FUNCTION__))
423 "Can only push / pop #pragma stack sentinels!")(static_cast <bool> ((Action == PSK_Push || Action == PSK_Pop
) && "Can only push / pop #pragma stack sentinels!") ?
void (0) : __assert_fail ("(Action == PSK_Push || Action == PSK_Pop) && \"Can only push / pop #pragma stack sentinels!\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 423, __extension__ __PRETTY_FUNCTION__));
424 Act(CurrentPragmaLocation, Action, Label, CurrentValue);
425 }
426
427 // Constructors.
428 explicit PragmaStack(const ValueType &Default)
429 : DefaultValue(Default), CurrentValue(Default) {}
430
431 bool hasValue() const { return CurrentValue != DefaultValue; }
432
433 SmallVector<Slot, 2> Stack;
434 ValueType DefaultValue; // Value used for PSK_Reset action.
435 ValueType CurrentValue;
436 SourceLocation CurrentPragmaLocation;
437 };
438 // FIXME: We should serialize / deserialize these if they occur in a PCH (but
439 // we shouldn't do so if they're in a module).
440
441 /// \brief Whether to insert vtordisps prior to virtual bases in the Microsoft
442 /// C++ ABI. Possible values are 0, 1, and 2, which mean:
443 ///
444 /// 0: Suppress all vtordisps
445 /// 1: Insert vtordisps in the presence of vbase overrides and non-trivial
446 /// structors
447 /// 2: Always insert vtordisps to support RTTI on partially constructed
448 /// objects
449 PragmaStack<MSVtorDispAttr::Mode> VtorDispStack;
450 // #pragma pack.
451 // Sentinel to represent when the stack is set to mac68k alignment.
452 static const unsigned kMac68kAlignmentSentinel = ~0U;
453 PragmaStack<unsigned> PackStack;
454 // The current #pragma pack values and locations at each #include.
455 struct PackIncludeState {
456 unsigned CurrentValue;
457 SourceLocation CurrentPragmaLocation;
458 bool HasNonDefaultValue, ShouldWarnOnInclude;
459 };
460 SmallVector<PackIncludeState, 8> PackIncludeStack;
461 // Segment #pragmas.
462 PragmaStack<StringLiteral *> DataSegStack;
463 PragmaStack<StringLiteral *> BSSSegStack;
464 PragmaStack<StringLiteral *> ConstSegStack;
465 PragmaStack<StringLiteral *> CodeSegStack;
466
467 // RAII object to push / pop sentinel slots for all MS #pragma stacks.
468 // Actions should be performed only if we enter / exit a C++ method body.
469 class PragmaStackSentinelRAII {
470 public:
471 PragmaStackSentinelRAII(Sema &S, StringRef SlotLabel, bool ShouldAct);
472 ~PragmaStackSentinelRAII();
473
474 private:
475 Sema &S;
476 StringRef SlotLabel;
477 bool ShouldAct;
478 };
479
480 /// A mapping that describes the nullability we've seen in each header file.
481 FileNullabilityMap NullabilityMap;
482
483 /// Last section used with #pragma init_seg.
484 StringLiteral *CurInitSeg;
485 SourceLocation CurInitSegLoc;
486
487 /// VisContext - Manages the stack for \#pragma GCC visibility.
488 void *VisContext; // Really a "PragmaVisStack*"
489
490 /// \brief This represents the stack of attributes that were pushed by
491 /// \#pragma clang attribute.
492 struct PragmaAttributeEntry {
493 SourceLocation Loc;
494 AttributeList *Attribute;
495 SmallVector<attr::SubjectMatchRule, 4> MatchRules;
496 bool IsUsed;
497 };
498 SmallVector<PragmaAttributeEntry, 2> PragmaAttributeStack;
499
500 /// \brief The declaration that is currently receiving an attribute from the
501 /// #pragma attribute stack.
502 const Decl *PragmaAttributeCurrentTargetDecl;
503
504 /// \brief This represents the last location of a "#pragma clang optimize off"
505 /// directive if such a directive has not been closed by an "on" yet. If
506 /// optimizations are currently "on", this is set to an invalid location.
507 SourceLocation OptimizeOffPragmaLocation;
508
509 /// \brief Flag indicating if Sema is building a recovery call expression.
510 ///
511 /// This flag is used to avoid building recovery call expressions
512 /// if Sema is already doing so, which would cause infinite recursions.
513 bool IsBuildingRecoveryCallExpr;
514
515 /// Used to control the generation of ExprWithCleanups.
516 CleanupInfo Cleanup;
517
518 /// ExprCleanupObjects - This is the stack of objects requiring
519 /// cleanup that are created by the current full expression. The
520 /// element type here is ExprWithCleanups::Object.
521 SmallVector<BlockDecl*, 8> ExprCleanupObjects;
522
523 /// \brief Store a list of either DeclRefExprs or MemberExprs
524 /// that contain a reference to a variable (constant) that may or may not
525 /// be odr-used in this Expr, and we won't know until all lvalue-to-rvalue
526 /// and discarded value conversions have been applied to all subexpressions
527 /// of the enclosing full expression. This is cleared at the end of each
528 /// full expression.
529 llvm::SmallPtrSet<Expr*, 2> MaybeODRUseExprs;
530
531 /// \brief Stack containing information about each of the nested
532 /// function, block, and method scopes that are currently active.
533 ///
534 /// This array is never empty. Clients should ignore the first
535 /// element, which is used to cache a single FunctionScopeInfo
536 /// that's used to parse every top-level function.
537 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes;
538
539 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource,
540 &ExternalSemaSource::ReadExtVectorDecls, 2, 2>
541 ExtVectorDeclsType;
542
543 /// ExtVectorDecls - This is a list all the extended vector types. This allows
544 /// us to associate a raw vector type with one of the ext_vector type names.
545 /// This is only necessary for issuing pretty diagnostics.
546 ExtVectorDeclsType ExtVectorDecls;
547
548 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes.
549 std::unique_ptr<CXXFieldCollector> FieldCollector;
550
551 typedef llvm::SmallSetVector<const NamedDecl*, 16> NamedDeclSetType;
552
553 /// \brief Set containing all declared private fields that are not used.
554 NamedDeclSetType UnusedPrivateFields;
555
556 /// \brief Set containing all typedefs that are likely unused.
557 llvm::SmallSetVector<const TypedefNameDecl *, 4>
558 UnusedLocalTypedefNameCandidates;
559
560 /// \brief Delete-expressions to be analyzed at the end of translation unit
561 ///
562 /// This list contains class members, and locations of delete-expressions
563 /// that could not be proven as to whether they mismatch with new-expression
564 /// used in initializer of the field.
565 typedef std::pair<SourceLocation, bool> DeleteExprLoc;
566 typedef llvm::SmallVector<DeleteExprLoc, 4> DeleteLocs;
567 llvm::MapVector<FieldDecl *, DeleteLocs> DeleteExprs;
568
569 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy;
570
571 /// PureVirtualClassDiagSet - a set of class declarations which we have
572 /// emitted a list of pure virtual functions. Used to prevent emitting the
573 /// same list more than once.
574 std::unique_ptr<RecordDeclSetTy> PureVirtualClassDiagSet;
575
576 /// ParsingInitForAutoVars - a set of declarations with auto types for which
577 /// we are currently parsing the initializer.
578 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars;
579
580 /// \brief Look for a locally scoped extern "C" declaration by the given name.
581 NamedDecl *findLocallyScopedExternCDecl(DeclarationName Name);
582
583 typedef LazyVector<VarDecl *, ExternalSemaSource,
584 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2>
585 TentativeDefinitionsType;
586
587 /// \brief All the tentative definitions encountered in the TU.
588 TentativeDefinitionsType TentativeDefinitions;
589
590 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource,
591 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2>
592 UnusedFileScopedDeclsType;
593
594 /// \brief The set of file scoped decls seen so far that have not been used
595 /// and must warn if not used. Only contains the first declaration.
596 UnusedFileScopedDeclsType UnusedFileScopedDecls;
597
598 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource,
599 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2>
600 DelegatingCtorDeclsType;
601
602 /// \brief All the delegating constructors seen so far in the file, used for
603 /// cycle detection at the end of the TU.
604 DelegatingCtorDeclsType DelegatingCtorDecls;
605
606 /// \brief All the overriding functions seen during a class definition
607 /// that had their exception spec checks delayed, plus the overridden
608 /// function.
609 SmallVector<std::pair<const CXXMethodDecl*, const CXXMethodDecl*>, 2>
610 DelayedExceptionSpecChecks;
611
612 /// \brief All the members seen during a class definition which were both
613 /// explicitly defaulted and had explicitly-specified exception
614 /// specifications, along with the function type containing their
615 /// user-specified exception specification. Those exception specifications
616 /// were overridden with the default specifications, but we still need to
617 /// check whether they are compatible with the default specification, and
618 /// we can't do that until the nesting set of class definitions is complete.
619 SmallVector<std::pair<CXXMethodDecl*, const FunctionProtoType*>, 2>
620 DelayedDefaultedMemberExceptionSpecs;
621
622 typedef llvm::MapVector<const FunctionDecl *,
623 std::unique_ptr<LateParsedTemplate>>
624 LateParsedTemplateMapT;
625 LateParsedTemplateMapT LateParsedTemplateMap;
626
627 /// \brief Callback to the parser to parse templated functions when needed.
628 typedef void LateTemplateParserCB(void *P, LateParsedTemplate &LPT);
629 typedef void LateTemplateParserCleanupCB(void *P);
630 LateTemplateParserCB *LateTemplateParser;
631 LateTemplateParserCleanupCB *LateTemplateParserCleanup;
632 void *OpaqueParser;
633
634 void SetLateTemplateParser(LateTemplateParserCB *LTP,
635 LateTemplateParserCleanupCB *LTPCleanup,
636 void *P) {
637 LateTemplateParser = LTP;
638 LateTemplateParserCleanup = LTPCleanup;
639 OpaqueParser = P;
640 }
641
642 class DelayedDiagnostics;
643
644 class DelayedDiagnosticsState {
645 sema::DelayedDiagnosticPool *SavedPool;
646 friend class Sema::DelayedDiagnostics;
647 };
648 typedef DelayedDiagnosticsState ParsingDeclState;
649 typedef DelayedDiagnosticsState ProcessingContextState;
650
651 /// A class which encapsulates the logic for delaying diagnostics
652 /// during parsing and other processing.
653 class DelayedDiagnostics {
654 /// \brief The current pool of diagnostics into which delayed
655 /// diagnostics should go.
656 sema::DelayedDiagnosticPool *CurPool;
657
658 public:
659 DelayedDiagnostics() : CurPool(nullptr) {}
660
661 /// Adds a delayed diagnostic.
662 void add(const sema::DelayedDiagnostic &diag); // in DelayedDiagnostic.h
663
664 /// Determines whether diagnostics should be delayed.
665 bool shouldDelayDiagnostics() { return CurPool != nullptr; }
666
667 /// Returns the current delayed-diagnostics pool.
668 sema::DelayedDiagnosticPool *getCurrentPool() const {
669 return CurPool;
670 }
671
672 /// Enter a new scope. Access and deprecation diagnostics will be
673 /// collected in this pool.
674 DelayedDiagnosticsState push(sema::DelayedDiagnosticPool &pool) {
675 DelayedDiagnosticsState state;
676 state.SavedPool = CurPool;
677 CurPool = &pool;
678 return state;
679 }
680
681 /// Leave a delayed-diagnostic state that was previously pushed.
682 /// Do not emit any of the diagnostics. This is performed as part
683 /// of the bookkeeping of popping a pool "properly".
684 void popWithoutEmitting(DelayedDiagnosticsState state) {
685 CurPool = state.SavedPool;
686 }
687
688 /// Enter a new scope where access and deprecation diagnostics are
689 /// not delayed.
690 DelayedDiagnosticsState pushUndelayed() {
691 DelayedDiagnosticsState state;
692 state.SavedPool = CurPool;
693 CurPool = nullptr;
694 return state;
695 }
696
697 /// Undo a previous pushUndelayed().
698 void popUndelayed(DelayedDiagnosticsState state) {
699 assert(CurPool == nullptr)(static_cast <bool> (CurPool == nullptr) ? void (0) : __assert_fail
("CurPool == nullptr", "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 699, __extension__ __PRETTY_FUNCTION__));
700 CurPool = state.SavedPool;
701 }
702 } DelayedDiagnostics;
703
704 /// A RAII object to temporarily push a declaration context.
705 class ContextRAII {
706 private:
707 Sema &S;
708 DeclContext *SavedContext;
709 ProcessingContextState SavedContextState;
710 QualType SavedCXXThisTypeOverride;
711
712 public:
713 ContextRAII(Sema &S, DeclContext *ContextToPush, bool NewThisContext = true)
714 : S(S), SavedContext(S.CurContext),
715 SavedContextState(S.DelayedDiagnostics.pushUndelayed()),
716 SavedCXXThisTypeOverride(S.CXXThisTypeOverride)
717 {
718 assert(ContextToPush && "pushing null context")(static_cast <bool> (ContextToPush && "pushing null context"
) ? void (0) : __assert_fail ("ContextToPush && \"pushing null context\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 718, __extension__ __PRETTY_FUNCTION__));
719 S.CurContext = ContextToPush;
720 if (NewThisContext)
721 S.CXXThisTypeOverride = QualType();
722 }
723
724 void pop() {
725 if (!SavedContext) return;
726 S.CurContext = SavedContext;
727 S.DelayedDiagnostics.popUndelayed(SavedContextState);
728 S.CXXThisTypeOverride = SavedCXXThisTypeOverride;
729 SavedContext = nullptr;
730 }
731
732 ~ContextRAII() {
733 pop();
734 }
735 };
736
737 /// \brief RAII object to handle the state changes required to synthesize
738 /// a function body.
739 class SynthesizedFunctionScope {
740 Sema &S;
741 Sema::ContextRAII SavedContext;
742 bool PushedCodeSynthesisContext = false;
743
744 public:
745 SynthesizedFunctionScope(Sema &S, DeclContext *DC)
746 : S(S), SavedContext(S, DC) {
747 S.PushFunctionScope();
748 S.PushExpressionEvaluationContext(
749 Sema::ExpressionEvaluationContext::PotentiallyEvaluated);
750 if (auto *FD = dyn_cast<FunctionDecl>(DC))
751 FD->setWillHaveBody(true);
752 else
753 assert(isa<ObjCMethodDecl>(DC))(static_cast <bool> (isa<ObjCMethodDecl>(DC)) ? void
(0) : __assert_fail ("isa<ObjCMethodDecl>(DC)", "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 753, __extension__ __PRETTY_FUNCTION__));
754 }
755
756 void addContextNote(SourceLocation UseLoc) {
757 assert(!PushedCodeSynthesisContext)(static_cast <bool> (!PushedCodeSynthesisContext) ? void
(0) : __assert_fail ("!PushedCodeSynthesisContext", "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 757, __extension__ __PRETTY_FUNCTION__));
758
759 Sema::CodeSynthesisContext Ctx;
760 Ctx.Kind = Sema::CodeSynthesisContext::DefiningSynthesizedFunction;
761 Ctx.PointOfInstantiation = UseLoc;
762 Ctx.Entity = cast<Decl>(S.CurContext);
763 S.pushCodeSynthesisContext(Ctx);
764
765 PushedCodeSynthesisContext = true;
766 }
767
768 ~SynthesizedFunctionScope() {
769 if (PushedCodeSynthesisContext)
770 S.popCodeSynthesisContext();
771 if (auto *FD = dyn_cast<FunctionDecl>(S.CurContext))
772 FD->setWillHaveBody(false);
773 S.PopExpressionEvaluationContext();
774 S.PopFunctionScopeInfo();
775 }
776 };
777
778 /// WeakUndeclaredIdentifiers - Identifiers contained in
779 /// \#pragma weak before declared. rare. may alias another
780 /// identifier, declared or undeclared
781 llvm::MapVector<IdentifierInfo *, WeakInfo> WeakUndeclaredIdentifiers;
782
783 /// ExtnameUndeclaredIdentifiers - Identifiers contained in
784 /// \#pragma redefine_extname before declared. Used in Solaris system headers
785 /// to define functions that occur in multiple standards to call the version
786 /// in the currently selected standard.
787 llvm::DenseMap<IdentifierInfo*,AsmLabelAttr*> ExtnameUndeclaredIdentifiers;
788
789
790 /// \brief Load weak undeclared identifiers from the external source.
791 void LoadExternalWeakUndeclaredIdentifiers();
792
793 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by
794 /// \#pragma weak during processing of other Decls.
795 /// I couldn't figure out a clean way to generate these in-line, so
796 /// we store them here and handle separately -- which is a hack.
797 /// It would be best to refactor this.
798 SmallVector<Decl*,2> WeakTopLevelDecl;
799
800 IdentifierResolver IdResolver;
801
802 /// Translation Unit Scope - useful to Objective-C actions that need
803 /// to lookup file scope declarations in the "ordinary" C decl namespace.
804 /// For example, user-defined classes, built-in "id" type, etc.
805 Scope *TUScope;
806
807 /// \brief The C++ "std" namespace, where the standard library resides.
808 LazyDeclPtr StdNamespace;
809
810 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++
811 /// standard library.
812 LazyDeclPtr StdBadAlloc;
813
814 /// \brief The C++ "std::align_val_t" enum class, which is defined by the C++
815 /// standard library.
816 LazyDeclPtr StdAlignValT;
817
818 /// \brief The C++ "std::experimental" namespace, where the experimental parts
819 /// of the standard library resides.
820 NamespaceDecl *StdExperimentalNamespaceCache;
821
822 /// \brief The C++ "std::initializer_list" template, which is defined in
823 /// \<initializer_list>.
824 ClassTemplateDecl *StdInitializerList;
825
826 /// \brief The C++ "type_info" declaration, which is defined in \<typeinfo>.
827 RecordDecl *CXXTypeInfoDecl;
828
829 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files.
830 RecordDecl *MSVCGuidDecl;
831
832 /// \brief Caches identifiers/selectors for NSFoundation APIs.
833 std::unique_ptr<NSAPI> NSAPIObj;
834
835 /// \brief The declaration of the Objective-C NSNumber class.
836 ObjCInterfaceDecl *NSNumberDecl;
837
838 /// \brief The declaration of the Objective-C NSValue class.
839 ObjCInterfaceDecl *NSValueDecl;
840
841 /// \brief Pointer to NSNumber type (NSNumber *).
842 QualType NSNumberPointer;
843
844 /// \brief Pointer to NSValue type (NSValue *).
845 QualType NSValuePointer;
846
847 /// \brief The Objective-C NSNumber methods used to create NSNumber literals.
848 ObjCMethodDecl *NSNumberLiteralMethods[NSAPI::NumNSNumberLiteralMethods];
849
850 /// \brief The declaration of the Objective-C NSString class.
851 ObjCInterfaceDecl *NSStringDecl;
852
853 /// \brief Pointer to NSString type (NSString *).
854 QualType NSStringPointer;
855
856 /// \brief The declaration of the stringWithUTF8String: method.
857 ObjCMethodDecl *StringWithUTF8StringMethod;
858
859 /// \brief The declaration of the valueWithBytes:objCType: method.
860 ObjCMethodDecl *ValueWithBytesObjCTypeMethod;
861
862 /// \brief The declaration of the Objective-C NSArray class.
863 ObjCInterfaceDecl *NSArrayDecl;
864
865 /// \brief The declaration of the arrayWithObjects:count: method.
866 ObjCMethodDecl *ArrayWithObjectsMethod;
867
868 /// \brief The declaration of the Objective-C NSDictionary class.
869 ObjCInterfaceDecl *NSDictionaryDecl;
870
871 /// \brief The declaration of the dictionaryWithObjects:forKeys:count: method.
872 ObjCMethodDecl *DictionaryWithObjectsMethod;
873
874 /// \brief id<NSCopying> type.
875 QualType QIDNSCopying;
876
877 /// \brief will hold 'respondsToSelector:'
878 Selector RespondsToSelectorSel;
879
880 /// A flag to remember whether the implicit forms of operator new and delete
881 /// have been declared.
882 bool GlobalNewDeleteDeclared;
883
884 /// A flag to indicate that we're in a context that permits abstract
885 /// references to fields. This is really a
886 bool AllowAbstractFieldReference;
887
888 /// \brief Describes how the expressions currently being parsed are
889 /// evaluated at run-time, if at all.
890 enum class ExpressionEvaluationContext {
891 /// \brief The current expression and its subexpressions occur within an
892 /// unevaluated operand (C++11 [expr]p7), such as the subexpression of
893 /// \c sizeof, where the type of the expression may be significant but
894 /// no code will be generated to evaluate the value of the expression at
895 /// run time.
896 Unevaluated,
897
898 /// \brief The current expression occurs within a braced-init-list within
899 /// an unevaluated operand. This is mostly like a regular unevaluated
900 /// context, except that we still instantiate constexpr functions that are
901 /// referenced here so that we can perform narrowing checks correctly.
902 UnevaluatedList,
903
904 /// \brief The current expression occurs within a discarded statement.
905 /// This behaves largely similarly to an unevaluated operand in preventing
906 /// definitions from being required, but not in other ways.
907 DiscardedStatement,
908
909 /// \brief The current expression occurs within an unevaluated
910 /// operand that unconditionally permits abstract references to
911 /// fields, such as a SIZE operator in MS-style inline assembly.
912 UnevaluatedAbstract,
913
914 /// \brief The current context is "potentially evaluated" in C++11 terms,
915 /// but the expression is evaluated at compile-time (like the values of
916 /// cases in a switch statement).
917 ConstantEvaluated,
918
919 /// \brief The current expression is potentially evaluated at run time,
920 /// which means that code may be generated to evaluate the value of the
921 /// expression at run time.
922 PotentiallyEvaluated,
923
924 /// \brief The current expression is potentially evaluated, but any
925 /// declarations referenced inside that expression are only used if
926 /// in fact the current expression is used.
927 ///
928 /// This value is used when parsing default function arguments, for which
929 /// we would like to provide diagnostics (e.g., passing non-POD arguments
930 /// through varargs) but do not want to mark declarations as "referenced"
931 /// until the default argument is used.
932 PotentiallyEvaluatedIfUsed
933 };
934
935 /// \brief Data structure used to record current or nested
936 /// expression evaluation contexts.
937 struct ExpressionEvaluationContextRecord {
938 /// \brief The expression evaluation context.
939 ExpressionEvaluationContext Context;
940
941 /// \brief Whether the enclosing context needed a cleanup.
942 CleanupInfo ParentCleanup;
943
944 /// \brief Whether we are in a decltype expression.
945 bool IsDecltype;
946
947 /// \brief The number of active cleanup objects when we entered
948 /// this expression evaluation context.
949 unsigned NumCleanupObjects;
950
951 /// \brief The number of typos encountered during this expression evaluation
952 /// context (i.e. the number of TypoExprs created).
953 unsigned NumTypos;
954
955 llvm::SmallPtrSet<Expr*, 2> SavedMaybeODRUseExprs;
956
957 /// \brief The lambdas that are present within this context, if it
958 /// is indeed an unevaluated context.
959 SmallVector<LambdaExpr *, 2> Lambdas;
960
961 /// \brief The declaration that provides context for lambda expressions
962 /// and block literals if the normal declaration context does not
963 /// suffice, e.g., in a default function argument.
964 Decl *ManglingContextDecl;
965
966 /// \brief The context information used to mangle lambda expressions
967 /// and block literals within this context.
968 ///
969 /// This mangling information is allocated lazily, since most contexts
970 /// do not have lambda expressions or block literals.
971 std::unique_ptr<MangleNumberingContext> MangleNumbering;
972
973 /// \brief If we are processing a decltype type, a set of call expressions
974 /// for which we have deferred checking the completeness of the return type.
975 SmallVector<CallExpr *, 8> DelayedDecltypeCalls;
976
977 /// \brief If we are processing a decltype type, a set of temporary binding
978 /// expressions for which we have deferred checking the destructor.
979 SmallVector<CXXBindTemporaryExpr *, 8> DelayedDecltypeBinds;
980
981 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context,
982 unsigned NumCleanupObjects,
983 CleanupInfo ParentCleanup,
984 Decl *ManglingContextDecl,
985 bool IsDecltype)
986 : Context(Context), ParentCleanup(ParentCleanup),
987 IsDecltype(IsDecltype), NumCleanupObjects(NumCleanupObjects),
988 NumTypos(0),
989 ManglingContextDecl(ManglingContextDecl), MangleNumbering() { }
990
991 /// \brief Retrieve the mangling numbering context, used to consistently
992 /// number constructs like lambdas for mangling.
993 MangleNumberingContext &getMangleNumberingContext(ASTContext &Ctx);
994
995 bool isUnevaluated() const {
996 return Context == ExpressionEvaluationContext::Unevaluated ||
997 Context == ExpressionEvaluationContext::UnevaluatedAbstract ||
998 Context == ExpressionEvaluationContext::UnevaluatedList;
999 }
1000 bool isConstantEvaluated() const {
1001 return Context == ExpressionEvaluationContext::ConstantEvaluated;
1002 }
1003 };
1004
1005 /// A stack of expression evaluation contexts.
1006 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts;
1007
1008 /// \brief Compute the mangling number context for a lambda expression or
1009 /// block literal.
1010 ///
1011 /// \param DC - The DeclContext containing the lambda expression or
1012 /// block literal.
1013 /// \param[out] ManglingContextDecl - Returns the ManglingContextDecl
1014 /// associated with the context, if relevant.
1015 MangleNumberingContext *getCurrentMangleNumberContext(
1016 const DeclContext *DC,
1017 Decl *&ManglingContextDecl);
1018
1019
1020 /// SpecialMemberOverloadResult - The overloading result for a special member
1021 /// function.
1022 ///
1023 /// This is basically a wrapper around PointerIntPair. The lowest bits of the
1024 /// integer are used to determine whether overload resolution succeeded.
1025 class SpecialMemberOverloadResult {
1026 public:
1027 enum Kind {
1028 NoMemberOrDeleted,
1029 Ambiguous,
1030 Success
1031 };
1032
1033 private:
1034 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair;
1035
1036 public:
1037 SpecialMemberOverloadResult() : Pair() {}
1038 SpecialMemberOverloadResult(CXXMethodDecl *MD)
1039 : Pair(MD, MD->isDeleted() ? NoMemberOrDeleted : Success) {}
1040
1041 CXXMethodDecl *getMethod() const { return Pair.getPointer(); }
1042 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); }
1043
1044 Kind getKind() const { return static_cast<Kind>(Pair.getInt()); }
1045 void setKind(Kind K) { Pair.setInt(K); }
1046 };
1047
1048 class SpecialMemberOverloadResultEntry
1049 : public llvm::FastFoldingSetNode,
1050 public SpecialMemberOverloadResult {
1051 public:
1052 SpecialMemberOverloadResultEntry(const llvm::FoldingSetNodeID &ID)
1053 : FastFoldingSetNode(ID)
1054 {}
1055 };
1056
1057 /// \brief A cache of special member function overload resolution results
1058 /// for C++ records.
1059 llvm::FoldingSet<SpecialMemberOverloadResultEntry> SpecialMemberCache;
1060
1061 /// \brief A cache of the flags available in enumerations with the flag_bits
1062 /// attribute.
1063 mutable llvm::DenseMap<const EnumDecl*, llvm::APInt> FlagBitsCache;
1064
1065 /// \brief The kind of translation unit we are processing.
1066 ///
1067 /// When we're processing a complete translation unit, Sema will perform
1068 /// end-of-translation-unit semantic tasks (such as creating
1069 /// initializers for tentative definitions in C) once parsing has
1070 /// completed. Modules and precompiled headers perform different kinds of
1071 /// checks.
1072 TranslationUnitKind TUKind;
1073
1074 llvm::BumpPtrAllocator BumpAlloc;
1075
1076 /// \brief The number of SFINAE diagnostics that have been trapped.
1077 unsigned NumSFINAEErrors;
1078
1079 typedef llvm::DenseMap<ParmVarDecl *, llvm::TinyPtrVector<ParmVarDecl *>>
1080 UnparsedDefaultArgInstantiationsMap;
1081
1082 /// \brief A mapping from parameters with unparsed default arguments to the
1083 /// set of instantiations of each parameter.
1084 ///
1085 /// This mapping is a temporary data structure used when parsing
1086 /// nested class templates or nested classes of class templates,
1087 /// where we might end up instantiating an inner class before the
1088 /// default arguments of its methods have been parsed.
1089 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations;
1090
1091 // Contains the locations of the beginning of unparsed default
1092 // argument locations.
1093 llvm::DenseMap<ParmVarDecl *, SourceLocation> UnparsedDefaultArgLocs;
1094
1095 /// UndefinedInternals - all the used, undefined objects which require a
1096 /// definition in this translation unit.
1097 llvm::MapVector<NamedDecl *, SourceLocation> UndefinedButUsed;
1098
1099 /// Determine if VD, which must be a variable or function, is an external
1100 /// symbol that nonetheless can't be referenced from outside this translation
1101 /// unit because its type has no linkage and it's not extern "C".
1102 bool isExternalWithNoLinkageType(ValueDecl *VD);
1103
1104 /// Obtain a sorted list of functions that are undefined but ODR-used.
1105 void getUndefinedButUsed(
1106 SmallVectorImpl<std::pair<NamedDecl *, SourceLocation> > &Undefined);
1107
1108 /// Retrieves list of suspicious delete-expressions that will be checked at
1109 /// the end of translation unit.
1110 const llvm::MapVector<FieldDecl *, DeleteLocs> &
1111 getMismatchingDeleteExpressions() const;
1112
1113 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods;
1114 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool;
1115
1116 /// Method Pool - allows efficient lookup when typechecking messages to "id".
1117 /// We need to maintain a list, since selectors can have differing signatures
1118 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1%
1119 /// of selectors are "overloaded").
1120 /// At the head of the list it is recorded whether there were 0, 1, or >= 2
1121 /// methods inside categories with a particular selector.
1122 GlobalMethodPool MethodPool;
1123
1124 /// Method selectors used in a \@selector expression. Used for implementation
1125 /// of -Wselector.
1126 llvm::MapVector<Selector, SourceLocation> ReferencedSelectors;
1127
1128 /// Kinds of C++ special members.
1129 enum CXXSpecialMember {
1130 CXXDefaultConstructor,
1131 CXXCopyConstructor,
1132 CXXMoveConstructor,
1133 CXXCopyAssignment,
1134 CXXMoveAssignment,
1135 CXXDestructor,
1136 CXXInvalid
1137 };
1138
1139 typedef llvm::PointerIntPair<CXXRecordDecl *, 3, CXXSpecialMember>
1140 SpecialMemberDecl;
1141
1142 /// The C++ special members which we are currently in the process of
1143 /// declaring. If this process recursively triggers the declaration of the
1144 /// same special member, we should act as if it is not yet declared.
1145 llvm::SmallPtrSet<SpecialMemberDecl, 4> SpecialMembersBeingDeclared;
1146
1147 /// The function definitions which were renamed as part of typo-correction
1148 /// to match their respective declarations. We want to keep track of them
1149 /// to ensure that we don't emit a "redefinition" error if we encounter a
1150 /// correctly named definition after the renamed definition.
1151 llvm::SmallPtrSet<const NamedDecl *, 4> TypoCorrectedFunctionDefinitions;
1152
1153 /// Stack of types that correspond to the parameter entities that are
1154 /// currently being copy-initialized. Can be empty.
1155 llvm::SmallVector<QualType, 4> CurrentParameterCopyTypes;
1156
1157 void ReadMethodPool(Selector Sel);
1158 void updateOutOfDateSelector(Selector Sel);
1159
1160 /// Private Helper predicate to check for 'self'.
1161 bool isSelfExpr(Expr *RExpr);
1162 bool isSelfExpr(Expr *RExpr, const ObjCMethodDecl *Method);
1163
1164 /// \brief Cause the active diagnostic on the DiagosticsEngine to be
1165 /// emitted. This is closely coupled to the SemaDiagnosticBuilder class and
1166 /// should not be used elsewhere.
1167 void EmitCurrentDiagnostic(unsigned DiagID);
1168
1169 /// Records and restores the FP_CONTRACT state on entry/exit of compound
1170 /// statements.
1171 class FPContractStateRAII {
1172 public:
1173 FPContractStateRAII(Sema &S) : S(S), OldFPFeaturesState(S.FPFeatures) {}
1174 ~FPContractStateRAII() { S.FPFeatures = OldFPFeaturesState; }
1175
1176 private:
1177 Sema& S;
1178 FPOptions OldFPFeaturesState;
1179 };
1180
1181 void addImplicitTypedef(StringRef Name, QualType T);
1182
1183public:
1184 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer,
1185 TranslationUnitKind TUKind = TU_Complete,
1186 CodeCompleteConsumer *CompletionConsumer = nullptr);
1187 ~Sema();
1188
1189 /// \brief Perform initialization that occurs after the parser has been
1190 /// initialized but before it parses anything.
1191 void Initialize();
1192
1193 const LangOptions &getLangOpts() const { return LangOpts; }
1194 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; }
1195 FPOptions &getFPOptions() { return FPFeatures; }
1196
1197 DiagnosticsEngine &getDiagnostics() const { return Diags; }
1198 SourceManager &getSourceManager() const { return SourceMgr; }
1199 Preprocessor &getPreprocessor() const { return PP; }
1200 ASTContext &getASTContext() const { return Context; }
1201 ASTConsumer &getASTConsumer() const { return Consumer; }
1202 ASTMutationListener *getASTMutationListener() const;
1203 ExternalSemaSource* getExternalSource() const { return ExternalSource; }
1204
1205 ///\brief Registers an external source. If an external source already exists,
1206 /// creates a multiplex external source and appends to it.
1207 ///
1208 ///\param[in] E - A non-null external sema source.
1209 ///
1210 void addExternalSource(ExternalSemaSource *E);
1211
1212 void PrintStats() const;
1213
1214 /// \brief Helper class that creates diagnostics with optional
1215 /// template instantiation stacks.
1216 ///
1217 /// This class provides a wrapper around the basic DiagnosticBuilder
1218 /// class that emits diagnostics. SemaDiagnosticBuilder is
1219 /// responsible for emitting the diagnostic (as DiagnosticBuilder
1220 /// does) and, if the diagnostic comes from inside a template
1221 /// instantiation, printing the template instantiation stack as
1222 /// well.
1223 class SemaDiagnosticBuilder : public DiagnosticBuilder {
1224 Sema &SemaRef;
1225 unsigned DiagID;
1226
1227 public:
1228 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID)
1229 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { }
1230
1231 // This is a cunning lie. DiagnosticBuilder actually performs move
1232 // construction in its copy constructor (but due to varied uses, it's not
1233 // possible to conveniently express this as actual move construction). So
1234 // the default copy ctor here is fine, because the base class disables the
1235 // source anyway, so the user-defined ~SemaDiagnosticBuilder is a safe no-op
1236 // in that case anwyay.
1237 SemaDiagnosticBuilder(const SemaDiagnosticBuilder&) = default;
1238
1239 ~SemaDiagnosticBuilder() {
1240 // If we aren't active, there is nothing to do.
1241 if (!isActive()) return;
1242
1243 // Otherwise, we need to emit the diagnostic. First flush the underlying
1244 // DiagnosticBuilder data, and clear the diagnostic builder itself so it
1245 // won't emit the diagnostic in its own destructor.
1246 //
1247 // This seems wasteful, in that as written the DiagnosticBuilder dtor will
1248 // do its own needless checks to see if the diagnostic needs to be
1249 // emitted. However, because we take care to ensure that the builder
1250 // objects never escape, a sufficiently smart compiler will be able to
1251 // eliminate that code.
1252 FlushCounts();
1253 Clear();
1254
1255 // Dispatch to Sema to emit the diagnostic.
1256 SemaRef.EmitCurrentDiagnostic(DiagID);
1257 }
1258
1259 /// Teach operator<< to produce an object of the correct type.
1260 template<typename T>
1261 friend const SemaDiagnosticBuilder &operator<<(
1262 const SemaDiagnosticBuilder &Diag, const T &Value) {
1263 const DiagnosticBuilder &BaseDiag = Diag;
1264 BaseDiag << Value;
1265 return Diag;
1266 }
1267 };
1268
1269 /// \brief Emit a diagnostic.
1270 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID) {
1271 DiagnosticBuilder DB = Diags.Report(Loc, DiagID);
1272 return SemaDiagnosticBuilder(DB, *this, DiagID);
1273 }
1274
1275 /// \brief Emit a partial diagnostic.
1276 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD);
1277
1278 /// \brief Build a partial diagnostic.
1279 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h
1280
1281 bool findMacroSpelling(SourceLocation &loc, StringRef name);
1282
1283 /// \brief Get a string to suggest for zero-initialization of a type.
1284 std::string
1285 getFixItZeroInitializerForType(QualType T, SourceLocation Loc) const;
1286 std::string getFixItZeroLiteralForType(QualType T, SourceLocation Loc) const;
1287
1288 /// \brief Calls \c Lexer::getLocForEndOfToken()
1289 SourceLocation getLocForEndOfToken(SourceLocation Loc, unsigned Offset = 0);
1290
1291 /// \brief Retrieve the module loader associated with the preprocessor.
1292 ModuleLoader &getModuleLoader() const;
1293
1294 void emitAndClearUnusedLocalTypedefWarnings();
1295
1296 void ActOnStartOfTranslationUnit();
1297 void ActOnEndOfTranslationUnit();
1298
1299 void CheckDelegatingCtorCycles();
1300
1301 Scope *getScopeForContext(DeclContext *Ctx);
1302
1303 void PushFunctionScope();
1304 void PushBlockScope(Scope *BlockScope, BlockDecl *Block);
1305 sema::LambdaScopeInfo *PushLambdaScope();
1306
1307 /// \brief This is used to inform Sema what the current TemplateParameterDepth
1308 /// is during Parsing. Currently it is used to pass on the depth
1309 /// when parsing generic lambda 'auto' parameters.
1310 void RecordParsingTemplateParameterDepth(unsigned Depth);
1311
1312 void PushCapturedRegionScope(Scope *RegionScope, CapturedDecl *CD,
1313 RecordDecl *RD,
1314 CapturedRegionKind K);
1315 void
1316 PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP = nullptr,
1317 const Decl *D = nullptr,
1318 const BlockExpr *blkExpr = nullptr);
1319
1320 sema::FunctionScopeInfo *getCurFunction() const {
1321 return FunctionScopes.back();
1322 }
1323
1324 sema::FunctionScopeInfo *getEnclosingFunction() const {
1325 if (FunctionScopes.empty())
1326 return nullptr;
1327
1328 for (int e = FunctionScopes.size()-1; e >= 0; --e) {
1329 if (isa<sema::BlockScopeInfo>(FunctionScopes[e]))
1330 continue;
1331 return FunctionScopes[e];
1332 }
1333 return nullptr;
1334 }
1335
1336 template <typename ExprT>
1337 void recordUseOfEvaluatedWeak(const ExprT *E, bool IsRead=true) {
1338 if (!isUnevaluatedContext())
1339 getCurFunction()->recordUseOfWeak(E, IsRead);
1340 }
1341
1342 void PushCompoundScope();
1343 void PopCompoundScope();
1344
1345 sema::CompoundScopeInfo &getCurCompoundScope() const;
1346
1347 bool hasAnyUnrecoverableErrorsInThisFunction() const;
1348
1349 /// \brief Retrieve the current block, if any.
1350 sema::BlockScopeInfo *getCurBlock();
1351
1352 /// Retrieve the current lambda scope info, if any.
1353 /// \param IgnoreNonLambdaCapturingScope true if should find the top-most
1354 /// lambda scope info ignoring all inner capturing scopes that are not
1355 /// lambda scopes.
1356 sema::LambdaScopeInfo *
1357 getCurLambda(bool IgnoreNonLambdaCapturingScope = false);
1358
1359 /// \brief Retrieve the current generic lambda info, if any.
1360 sema::LambdaScopeInfo *getCurGenericLambda();
1361
1362 /// \brief Retrieve the current captured region, if any.
1363 sema::CapturedRegionScopeInfo *getCurCapturedRegion();
1364
1365 /// WeakTopLevelDeclDecls - access to \#pragma weak-generated Decls
1366 SmallVectorImpl<Decl *> &WeakTopLevelDecls() { return WeakTopLevelDecl; }
1367
1368 void ActOnComment(SourceRange Comment);
1369
1370 //===--------------------------------------------------------------------===//
1371 // Type Analysis / Processing: SemaType.cpp.
1372 //
1373
1374 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs,
1375 const DeclSpec *DS = nullptr);
1376 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVRA,
1377 const DeclSpec *DS = nullptr);
1378 QualType BuildPointerType(QualType T,
1379 SourceLocation Loc, DeclarationName Entity);
1380 QualType BuildReferenceType(QualType T, bool LValueRef,
1381 SourceLocation Loc, DeclarationName Entity);
1382 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM,
1383 Expr *ArraySize, unsigned Quals,
1384 SourceRange Brackets, DeclarationName Entity);
1385 QualType BuildExtVectorType(QualType T, Expr *ArraySize,
1386 SourceLocation AttrLoc);
1387 QualType BuildAddressSpaceAttr(QualType &T, Expr *AddrSpace,
1388 SourceLocation AttrLoc);
1389
1390 bool CheckFunctionReturnType(QualType T, SourceLocation Loc);
1391
1392 /// \brief Build a function type.
1393 ///
1394 /// This routine checks the function type according to C++ rules and
1395 /// under the assumption that the result type and parameter types have
1396 /// just been instantiated from a template. It therefore duplicates
1397 /// some of the behavior of GetTypeForDeclarator, but in a much
1398 /// simpler form that is only suitable for this narrow use case.
1399 ///
1400 /// \param T The return type of the function.
1401 ///
1402 /// \param ParamTypes The parameter types of the function. This array
1403 /// will be modified to account for adjustments to the types of the
1404 /// function parameters.
1405 ///
1406 /// \param Loc The location of the entity whose type involves this
1407 /// function type or, if there is no such entity, the location of the
1408 /// type that will have function type.
1409 ///
1410 /// \param Entity The name of the entity that involves the function
1411 /// type, if known.
1412 ///
1413 /// \param EPI Extra information about the function type. Usually this will
1414 /// be taken from an existing function with the same prototype.
1415 ///
1416 /// \returns A suitable function type, if there are no errors. The
1417 /// unqualified type will always be a FunctionProtoType.
1418 /// Otherwise, returns a NULL type.
1419 QualType BuildFunctionType(QualType T,
1420 MutableArrayRef<QualType> ParamTypes,
1421 SourceLocation Loc, DeclarationName Entity,
1422 const FunctionProtoType::ExtProtoInfo &EPI);
1423
1424 QualType BuildMemberPointerType(QualType T, QualType Class,
1425 SourceLocation Loc,
1426 DeclarationName Entity);
1427 QualType BuildBlockPointerType(QualType T,
1428 SourceLocation Loc, DeclarationName Entity);
1429 QualType BuildParenType(QualType T);
1430 QualType BuildAtomicType(QualType T, SourceLocation Loc);
1431 QualType BuildReadPipeType(QualType T,
1432 SourceLocation Loc);
1433 QualType BuildWritePipeType(QualType T,
1434 SourceLocation Loc);
1435
1436 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S);
1437 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy);
1438 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T,
1439 TypeSourceInfo *ReturnTypeInfo);
1440
1441 /// \brief Package the given type and TSI into a ParsedType.
1442 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo);
1443 DeclarationNameInfo GetNameForDeclarator(Declarator &D);
1444 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name);
1445 static QualType GetTypeFromParser(ParsedType Ty,
1446 TypeSourceInfo **TInfo = nullptr);
1447 CanThrowResult canThrow(const Expr *E);
1448 const FunctionProtoType *ResolveExceptionSpec(SourceLocation Loc,
1449 const FunctionProtoType *FPT);
1450 void UpdateExceptionSpec(FunctionDecl *FD,
1451 const FunctionProtoType::ExceptionSpecInfo &ESI);
1452 bool CheckSpecifiedExceptionType(QualType &T, SourceRange Range);
1453 bool CheckDistantExceptionSpec(QualType T);
1454 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New);
1455 bool CheckEquivalentExceptionSpec(
1456 const FunctionProtoType *Old, SourceLocation OldLoc,
1457 const FunctionProtoType *New, SourceLocation NewLoc);
1458 bool CheckEquivalentExceptionSpec(
1459 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID,
1460 const FunctionProtoType *Old, SourceLocation OldLoc,
1461 const FunctionProtoType *New, SourceLocation NewLoc);
1462 bool CheckExceptionSpecSubset(const PartialDiagnostic &DiagID,
1463 const PartialDiagnostic &NestedDiagID,
1464 const PartialDiagnostic &NoteID,
1465 const FunctionProtoType *Superset,
1466 SourceLocation SuperLoc,
1467 const FunctionProtoType *Subset,
1468 SourceLocation SubLoc);
1469 bool CheckParamExceptionSpec(const PartialDiagnostic &NestedDiagID,
1470 const PartialDiagnostic &NoteID,
1471 const FunctionProtoType *Target,
1472 SourceLocation TargetLoc,
1473 const FunctionProtoType *Source,
1474 SourceLocation SourceLoc);
1475
1476 TypeResult ActOnTypeName(Scope *S, Declarator &D);
1477
1478 /// \brief The parser has parsed the context-sensitive type 'instancetype'
1479 /// in an Objective-C message declaration. Return the appropriate type.
1480 ParsedType ActOnObjCInstanceType(SourceLocation Loc);
1481
1482 /// \brief Abstract class used to diagnose incomplete types.
1483 struct TypeDiagnoser {
1484 TypeDiagnoser() {}
1485
1486 virtual void diagnose(Sema &S, SourceLocation Loc, QualType T) = 0;
1487 virtual ~TypeDiagnoser() {}
1488 };
1489
1490 static int getPrintable(int I) { return I; }
1491 static unsigned getPrintable(unsigned I) { return I; }
1492 static bool getPrintable(bool B) { return B; }
1493 static const char * getPrintable(const char *S) { return S; }
1494 static StringRef getPrintable(StringRef S) { return S; }
1495 static const std::string &getPrintable(const std::string &S) { return S; }
1496 static const IdentifierInfo *getPrintable(const IdentifierInfo *II) {
1497 return II;
1498 }
1499 static DeclarationName getPrintable(DeclarationName N) { return N; }
1500 static QualType getPrintable(QualType T) { return T; }
1501 static SourceRange getPrintable(SourceRange R) { return R; }
1502 static SourceRange getPrintable(SourceLocation L) { return L; }
1503 static SourceRange getPrintable(const Expr *E) { return E->getSourceRange(); }
1504 static SourceRange getPrintable(TypeLoc TL) { return TL.getSourceRange();}
1505
1506 template <typename... Ts> class BoundTypeDiagnoser : public TypeDiagnoser {
1507 unsigned DiagID;
1508 std::tuple<const Ts &...> Args;
1509
1510 template <std::size_t... Is>
1511 void emit(const SemaDiagnosticBuilder &DB,
1512 llvm::index_sequence<Is...>) const {
1513 // Apply all tuple elements to the builder in order.
1514 bool Dummy[] = {false, (DB << getPrintable(std::get<Is>(Args)))...};
1515 (void)Dummy;
1516 }
1517
1518 public:
1519 BoundTypeDiagnoser(unsigned DiagID, const Ts &...Args)
1520 : TypeDiagnoser(), DiagID(DiagID), Args(Args...) {
1521 assert(DiagID != 0 && "no diagnostic for type diagnoser")(static_cast <bool> (DiagID != 0 && "no diagnostic for type diagnoser"
) ? void (0) : __assert_fail ("DiagID != 0 && \"no diagnostic for type diagnoser\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 1521, __extension__ __PRETTY_FUNCTION__));
1522 }
1523
1524 void diagnose(Sema &S, SourceLocation Loc, QualType T) override {
1525 const SemaDiagnosticBuilder &DB = S.Diag(Loc, DiagID);
1526 emit(DB, llvm::index_sequence_for<Ts...>());
1527 DB << T;
1528 }
1529 };
1530
1531private:
1532 bool RequireCompleteTypeImpl(SourceLocation Loc, QualType T,
1533 TypeDiagnoser *Diagnoser);
1534
1535 struct ModuleScope {
1536 clang::Module *Module = nullptr;
1537 bool ModuleInterface = false;
1538 VisibleModuleSet OuterVisibleModules;
1539 };
1540 /// The modules we're currently parsing.
1541 llvm::SmallVector<ModuleScope, 16> ModuleScopes;
1542
1543 /// Get the module whose scope we are currently within.
1544 Module *getCurrentModule() const {
1545 return ModuleScopes.empty() ? nullptr : ModuleScopes.back().Module;
1546 }
1547
1548 VisibleModuleSet VisibleModules;
1549
1550public:
1551 /// \brief Get the module owning an entity.
1552 Module *getOwningModule(Decl *Entity) { return Entity->getOwningModule(); }
1553
1554 /// \brief Make a merged definition of an existing hidden definition \p ND
1555 /// visible at the specified location.
1556 void makeMergedDefinitionVisible(NamedDecl *ND);
1557
1558 bool isModuleVisible(const Module *M) { return VisibleModules.isVisible(M); }
1559
1560 /// Determine whether a declaration is visible to name lookup.
1561 bool isVisible(const NamedDecl *D) {
1562 return !D->isHidden() || isVisibleSlow(D);
1563 }
1564
1565 /// Determine whether any declaration of an entity is visible.
1566 bool
1567 hasVisibleDeclaration(const NamedDecl *D,
1568 llvm::SmallVectorImpl<Module *> *Modules = nullptr) {
1569 return isVisible(D) || hasVisibleDeclarationSlow(D, Modules);
1570 }
1571 bool hasVisibleDeclarationSlow(const NamedDecl *D,
1572 llvm::SmallVectorImpl<Module *> *Modules);
1573
1574 bool hasVisibleMergedDefinition(NamedDecl *Def);
1575 bool hasMergedDefinitionInCurrentModule(NamedDecl *Def);
1576
1577 /// Determine if \p D and \p Suggested have a structurally compatible
1578 /// layout as described in C11 6.2.7/1.
1579 bool hasStructuralCompatLayout(Decl *D, Decl *Suggested);
1580
1581 /// Determine if \p D has a visible definition. If not, suggest a declaration
1582 /// that should be made visible to expose the definition.
1583 bool hasVisibleDefinition(NamedDecl *D, NamedDecl **Suggested,
1584 bool OnlyNeedComplete = false);
1585 bool hasVisibleDefinition(const NamedDecl *D) {
1586 NamedDecl *Hidden;
1587 return hasVisibleDefinition(const_cast<NamedDecl*>(D), &Hidden);
1588 }
1589
1590 /// Determine if the template parameter \p D has a visible default argument.
1591 bool
1592 hasVisibleDefaultArgument(const NamedDecl *D,
1593 llvm::SmallVectorImpl<Module *> *Modules = nullptr);
1594
1595 /// Determine if there is a visible declaration of \p D that is an explicit
1596 /// specialization declaration for a specialization of a template. (For a
1597 /// member specialization, use hasVisibleMemberSpecialization.)
1598 bool hasVisibleExplicitSpecialization(
1599 const NamedDecl *D, llvm::SmallVectorImpl<Module *> *Modules = nullptr);
1600
1601 /// Determine if there is a visible declaration of \p D that is a member
1602 /// specialization declaration (as opposed to an instantiated declaration).
1603 bool hasVisibleMemberSpecialization(
1604 const NamedDecl *D, llvm::SmallVectorImpl<Module *> *Modules = nullptr);
1605
1606 /// Determine if \p A and \p B are equivalent internal linkage declarations
1607 /// from different modules, and thus an ambiguity error can be downgraded to
1608 /// an extension warning.
1609 bool isEquivalentInternalLinkageDeclaration(const NamedDecl *A,
1610 const NamedDecl *B);
1611 void diagnoseEquivalentInternalLinkageDeclarations(
1612 SourceLocation Loc, const NamedDecl *D,
1613 ArrayRef<const NamedDecl *> Equiv);
1614
1615 bool isCompleteType(SourceLocation Loc, QualType T) {
1616 return !RequireCompleteTypeImpl(Loc, T, nullptr);
1617 }
1618 bool RequireCompleteType(SourceLocation Loc, QualType T,
1619 TypeDiagnoser &Diagnoser);
1620 bool RequireCompleteType(SourceLocation Loc, QualType T,
1621 unsigned DiagID);
1622
1623 template <typename... Ts>
1624 bool RequireCompleteType(SourceLocation Loc, QualType T, unsigned DiagID,
1625 const Ts &...Args) {
1626 BoundTypeDiagnoser<Ts...> Diagnoser(DiagID, Args...);
1627 return RequireCompleteType(Loc, T, Diagnoser);
1628 }
1629
1630 void completeExprArrayBound(Expr *E);
1631 bool RequireCompleteExprType(Expr *E, TypeDiagnoser &Diagnoser);
1632 bool RequireCompleteExprType(Expr *E, unsigned DiagID);
1633
1634 template <typename... Ts>
1635 bool RequireCompleteExprType(Expr *E, unsigned DiagID, const Ts &...Args) {
1636 BoundTypeDiagnoser<Ts...> Diagnoser(DiagID, Args...);
1637 return RequireCompleteExprType(E, Diagnoser);
1638 }
1639
1640 bool RequireLiteralType(SourceLocation Loc, QualType T,
1641 TypeDiagnoser &Diagnoser);
1642 bool RequireLiteralType(SourceLocation Loc, QualType T, unsigned DiagID);
1643
1644 template <typename... Ts>
1645 bool RequireLiteralType(SourceLocation Loc, QualType T, unsigned DiagID,
1646 const Ts &...Args) {
1647 BoundTypeDiagnoser<Ts...> Diagnoser(DiagID, Args...);
1648 return RequireLiteralType(Loc, T, Diagnoser);
1649 }
1650
1651 QualType getElaboratedType(ElaboratedTypeKeyword Keyword,
1652 const CXXScopeSpec &SS, QualType T);
1653
1654 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc);
1655 /// If AsUnevaluated is false, E is treated as though it were an evaluated
1656 /// context, such as when building a type for decltype(auto).
1657 QualType BuildDecltypeType(Expr *E, SourceLocation Loc,
1658 bool AsUnevaluated = true);
1659 QualType BuildUnaryTransformType(QualType BaseType,
1660 UnaryTransformType::UTTKind UKind,
1661 SourceLocation Loc);
1662
1663 //===--------------------------------------------------------------------===//
1664 // Symbol table / Decl tracking callbacks: SemaDecl.cpp.
1665 //
1666
1667 struct SkipBodyInfo {
1668 SkipBodyInfo()
1669 : ShouldSkip(false), CheckSameAsPrevious(false), Previous(nullptr),
1670 New(nullptr) {}
1671 bool ShouldSkip;
1672 bool CheckSameAsPrevious;
1673 NamedDecl *Previous;
1674 NamedDecl *New;
1675 };
1676
1677 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = nullptr);
1678
1679 void DiagnoseUseOfUnimplementedSelectors();
1680
1681 bool isSimpleTypeSpecifier(tok::TokenKind Kind) const;
1682
1683 ParsedType getTypeName(const IdentifierInfo &II, SourceLocation NameLoc,
1684 Scope *S, CXXScopeSpec *SS = nullptr,
1685 bool isClassName = false, bool HasTrailingDot = false,
1686 ParsedType ObjectType = nullptr,
1687 bool IsCtorOrDtorName = false,
1688 bool WantNontrivialTypeSourceInfo = false,
1689 bool IsClassTemplateDeductionContext = true,
1690 IdentifierInfo **CorrectedII = nullptr);
1691 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S);
1692 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S);
1693 void DiagnoseUnknownTypeName(IdentifierInfo *&II,
1694 SourceLocation IILoc,
1695 Scope *S,
1696 CXXScopeSpec *SS,
1697 ParsedType &SuggestedType,
1698 bool IsTemplateName = false);
1699
1700 /// Attempt to behave like MSVC in situations where lookup of an unqualified
1701 /// type name has failed in a dependent context. In these situations, we
1702 /// automatically form a DependentTypeName that will retry lookup in a related
1703 /// scope during instantiation.
1704 ParsedType ActOnMSVCUnknownTypeName(const IdentifierInfo &II,
1705 SourceLocation NameLoc,
1706 bool IsTemplateTypeArg);
1707
1708 /// \brief Describes the result of the name lookup and resolution performed
1709 /// by \c ClassifyName().
1710 enum NameClassificationKind {
1711 NC_Unknown,
1712 NC_Error,
1713 NC_Keyword,
1714 NC_Type,
1715 NC_Expression,
1716 NC_NestedNameSpecifier,
1717 NC_TypeTemplate,
1718 NC_VarTemplate,
1719 NC_FunctionTemplate
1720 };
1721
1722 class NameClassification {
1723 NameClassificationKind Kind;
1724 ExprResult Expr;
1725 TemplateName Template;
1726 ParsedType Type;
1727
1728 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {}
1729
1730 public:
1731 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {}
1732
1733 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {}
1734
1735 NameClassification(const IdentifierInfo *Keyword) : Kind(NC_Keyword) {}
1736
1737 static NameClassification Error() {
1738 return NameClassification(NC_Error);
1739 }
1740
1741 static NameClassification Unknown() {
1742 return NameClassification(NC_Unknown);
1743 }
1744
1745 static NameClassification NestedNameSpecifier() {
1746 return NameClassification(NC_NestedNameSpecifier);
1747 }
1748
1749 static NameClassification TypeTemplate(TemplateName Name) {
1750 NameClassification Result(NC_TypeTemplate);
1751 Result.Template = Name;
1752 return Result;
1753 }
1754
1755 static NameClassification VarTemplate(TemplateName Name) {
1756 NameClassification Result(NC_VarTemplate);
1757 Result.Template = Name;
1758 return Result;
1759 }
1760
1761 static NameClassification FunctionTemplate(TemplateName Name) {
1762 NameClassification Result(NC_FunctionTemplate);
1763 Result.Template = Name;
1764 return Result;
1765 }
1766
1767 NameClassificationKind getKind() const { return Kind; }
1768
1769 ParsedType getType() const {
1770 assert(Kind == NC_Type)(static_cast <bool> (Kind == NC_Type) ? void (0) : __assert_fail
("Kind == NC_Type", "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 1770, __extension__ __PRETTY_FUNCTION__));
1771 return Type;
1772 }
1773
1774 ExprResult getExpression() const {
1775 assert(Kind == NC_Expression)(static_cast <bool> (Kind == NC_Expression) ? void (0) :
__assert_fail ("Kind == NC_Expression", "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 1775, __extension__ __PRETTY_FUNCTION__));
1776 return Expr;
1777 }
1778
1779 TemplateName getTemplateName() const {
1780 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate ||(static_cast <bool> (Kind == NC_TypeTemplate || Kind ==
NC_FunctionTemplate || Kind == NC_VarTemplate) ? void (0) : __assert_fail
("Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate || Kind == NC_VarTemplate"
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 1781, __extension__ __PRETTY_FUNCTION__))
1781 Kind == NC_VarTemplate)(static_cast <bool> (Kind == NC_TypeTemplate || Kind ==
NC_FunctionTemplate || Kind == NC_VarTemplate) ? void (0) : __assert_fail
("Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate || Kind == NC_VarTemplate"
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 1781, __extension__ __PRETTY_FUNCTION__));
1782 return Template;
1783 }
1784
1785 TemplateNameKind getTemplateNameKind() const {
1786 switch (Kind) {
1787 case NC_TypeTemplate:
1788 return TNK_Type_template;
1789 case NC_FunctionTemplate:
1790 return TNK_Function_template;
1791 case NC_VarTemplate:
1792 return TNK_Var_template;
1793 default:
1794 llvm_unreachable("unsupported name classification.")::llvm::llvm_unreachable_internal("unsupported name classification."
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 1794);
1795 }
1796 }
1797 };
1798
1799 /// \brief Perform name lookup on the given name, classifying it based on
1800 /// the results of name lookup and the following token.
1801 ///
1802 /// This routine is used by the parser to resolve identifiers and help direct
1803 /// parsing. When the identifier cannot be found, this routine will attempt
1804 /// to correct the typo and classify based on the resulting name.
1805 ///
1806 /// \param S The scope in which we're performing name lookup.
1807 ///
1808 /// \param SS The nested-name-specifier that precedes the name.
1809 ///
1810 /// \param Name The identifier. If typo correction finds an alternative name,
1811 /// this pointer parameter will be updated accordingly.
1812 ///
1813 /// \param NameLoc The location of the identifier.
1814 ///
1815 /// \param NextToken The token following the identifier. Used to help
1816 /// disambiguate the name.
1817 ///
1818 /// \param IsAddressOfOperand True if this name is the operand of a unary
1819 /// address of ('&') expression, assuming it is classified as an
1820 /// expression.
1821 ///
1822 /// \param CCC The correction callback, if typo correction is desired.
1823 NameClassification
1824 ClassifyName(Scope *S, CXXScopeSpec &SS, IdentifierInfo *&Name,
1825 SourceLocation NameLoc, const Token &NextToken,
1826 bool IsAddressOfOperand,
1827 std::unique_ptr<CorrectionCandidateCallback> CCC = nullptr);
1828
1829 /// Describes the detailed kind of a template name. Used in diagnostics.
1830 enum class TemplateNameKindForDiagnostics {
1831 ClassTemplate,
1832 FunctionTemplate,
1833 VarTemplate,
1834 AliasTemplate,
1835 TemplateTemplateParam,
1836 DependentTemplate
1837 };
1838 TemplateNameKindForDiagnostics
1839 getTemplateNameKindForDiagnostics(TemplateName Name);
1840
1841 /// Determine whether it's plausible that E was intended to be a
1842 /// template-name.
1843 bool mightBeIntendedToBeTemplateName(ExprResult E) {
1844 if (!getLangOpts().CPlusPlus || E.isInvalid())
1845 return false;
1846 if (auto *DRE = dyn_cast<DeclRefExpr>(E.get()))
1847 return !DRE->hasExplicitTemplateArgs();
1848 if (auto *ME = dyn_cast<MemberExpr>(E.get()))
1849 return !ME->hasExplicitTemplateArgs();
1850 // Any additional cases recognized here should also be handled by
1851 // diagnoseExprIntendedAsTemplateName.
1852 return false;
1853 }
1854 void diagnoseExprIntendedAsTemplateName(Scope *S, ExprResult TemplateName,
1855 SourceLocation Less,
1856 SourceLocation Greater);
1857
1858 Decl *ActOnDeclarator(Scope *S, Declarator &D);
1859
1860 NamedDecl *HandleDeclarator(Scope *S, Declarator &D,
1861 MultiTemplateParamsArg TemplateParameterLists);
1862 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, Scope *S);
1863 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info);
1864 bool diagnoseQualifiedDeclaration(CXXScopeSpec &SS, DeclContext *DC,
1865 DeclarationName Name,
1866 SourceLocation Loc);
1867 void
1868 diagnoseIgnoredQualifiers(unsigned DiagID, unsigned Quals,
1869 SourceLocation FallbackLoc,
1870 SourceLocation ConstQualLoc = SourceLocation(),
1871 SourceLocation VolatileQualLoc = SourceLocation(),
1872 SourceLocation RestrictQualLoc = SourceLocation(),
1873 SourceLocation AtomicQualLoc = SourceLocation(),
1874 SourceLocation UnalignedQualLoc = SourceLocation());
1875
1876 static bool adjustContextForLocalExternDecl(DeclContext *&DC);
1877 void DiagnoseFunctionSpecifiers(const DeclSpec &DS);
1878 NamedDecl *getShadowedDeclaration(const TypedefNameDecl *D,
1879 const LookupResult &R);
1880 NamedDecl *getShadowedDeclaration(const VarDecl *D, const LookupResult &R);
1881 void CheckShadow(NamedDecl *D, NamedDecl *ShadowedDecl,
1882 const LookupResult &R);
1883 void CheckShadow(Scope *S, VarDecl *D);
1884
1885 /// Warn if 'E', which is an expression that is about to be modified, refers
1886 /// to a shadowing declaration.
1887 void CheckShadowingDeclModification(Expr *E, SourceLocation Loc);
1888
1889 void DiagnoseShadowingLambdaDecls(const sema::LambdaScopeInfo *LSI);
1890
1891private:
1892 /// Map of current shadowing declarations to shadowed declarations. Warn if
1893 /// it looks like the user is trying to modify the shadowing declaration.
1894 llvm::DenseMap<const NamedDecl *, const NamedDecl *> ShadowingDecls;
1895
1896public:
1897 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange);
1898 void handleTagNumbering(const TagDecl *Tag, Scope *TagScope);
1899 void setTagNameForLinkagePurposes(TagDecl *TagFromDeclSpec,
1900 TypedefNameDecl *NewTD);
1901 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D);
1902 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC,
1903 TypeSourceInfo *TInfo,
1904 LookupResult &Previous);
1905 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D,
1906 LookupResult &Previous, bool &Redeclaration);
1907 NamedDecl *ActOnVariableDeclarator(Scope *S, Declarator &D, DeclContext *DC,
1908 TypeSourceInfo *TInfo,
1909 LookupResult &Previous,
1910 MultiTemplateParamsArg TemplateParamLists,
1911 bool &AddToScope,
1912 ArrayRef<BindingDecl *> Bindings = None);
1913 NamedDecl *
1914 ActOnDecompositionDeclarator(Scope *S, Declarator &D,
1915 MultiTemplateParamsArg TemplateParamLists);
1916 // Returns true if the variable declaration is a redeclaration
1917 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous);
1918 void CheckVariableDeclarationType(VarDecl *NewVD);
1919 bool DeduceVariableDeclarationType(VarDecl *VDecl, bool DirectInit,
1920 Expr *Init);
1921 void CheckCompleteVariableDeclaration(VarDecl *VD);
1922 void CheckCompleteDecompositionDeclaration(DecompositionDecl *DD);
1923 void MaybeSuggestAddingStaticToDecl(const FunctionDecl *D);
1924
1925 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC,
1926 TypeSourceInfo *TInfo,
1927 LookupResult &Previous,
1928 MultiTemplateParamsArg TemplateParamLists,
1929 bool &AddToScope);
1930 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD);
1931
1932 bool CheckConstexprFunctionDecl(const FunctionDecl *FD);
1933 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body);
1934
1935 void DiagnoseHiddenVirtualMethods(CXXMethodDecl *MD);
1936 void FindHiddenVirtualMethods(CXXMethodDecl *MD,
1937 SmallVectorImpl<CXXMethodDecl*> &OverloadedMethods);
1938 void NoteHiddenVirtualMethods(CXXMethodDecl *MD,
1939 SmallVectorImpl<CXXMethodDecl*> &OverloadedMethods);
1940 // Returns true if the function declaration is a redeclaration
1941 bool CheckFunctionDeclaration(Scope *S,
1942 FunctionDecl *NewFD, LookupResult &Previous,
1943 bool IsMemberSpecialization);
1944 bool shouldLinkDependentDeclWithPrevious(Decl *D, Decl *OldDecl);
1945 void CheckMain(FunctionDecl *FD, const DeclSpec &D);
1946 void CheckMSVCRTEntryPoint(FunctionDecl *FD);
1947 Decl *ActOnParamDeclarator(Scope *S, Declarator &D);
1948 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC,
1949 SourceLocation Loc,
1950 QualType T);
1951 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc,
1952 SourceLocation NameLoc, IdentifierInfo *Name,
1953 QualType T, TypeSourceInfo *TSInfo,
1954 StorageClass SC);
1955 void ActOnParamDefaultArgument(Decl *param,
1956 SourceLocation EqualLoc,
1957 Expr *defarg);
1958 void ActOnParamUnparsedDefaultArgument(Decl *param,
1959 SourceLocation EqualLoc,
1960 SourceLocation ArgLoc);
1961 void ActOnParamDefaultArgumentError(Decl *param, SourceLocation EqualLoc);
1962 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg,
1963 SourceLocation EqualLoc);
1964
1965 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit);
1966 void ActOnUninitializedDecl(Decl *dcl);
1967 void ActOnInitializerError(Decl *Dcl);
1968
1969 void ActOnPureSpecifier(Decl *D, SourceLocation PureSpecLoc);
1970 void ActOnCXXForRangeDecl(Decl *D);
1971 StmtResult ActOnCXXForRangeIdentifier(Scope *S, SourceLocation IdentLoc,
1972 IdentifierInfo *Ident,
1973 ParsedAttributes &Attrs,
1974 SourceLocation AttrEnd);
1975 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc);
1976 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc);
1977 void FinalizeDeclaration(Decl *D);
1978 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS,
1979 ArrayRef<Decl *> Group);
1980 DeclGroupPtrTy BuildDeclaratorGroup(MutableArrayRef<Decl *> Group);
1981
1982 /// Should be called on all declarations that might have attached
1983 /// documentation comments.
1984 void ActOnDocumentableDecl(Decl *D);
1985 void ActOnDocumentableDecls(ArrayRef<Decl *> Group);
1986
1987 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D,
1988 SourceLocation LocAfterDecls);
1989 void CheckForFunctionRedefinition(
1990 FunctionDecl *FD, const FunctionDecl *EffectiveDefinition = nullptr,
1991 SkipBodyInfo *SkipBody = nullptr);
1992 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D,
1993 MultiTemplateParamsArg TemplateParamLists,
1994 SkipBodyInfo *SkipBody = nullptr);
1995 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D,
1996 SkipBodyInfo *SkipBody = nullptr);
1997 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D);
1998 bool isObjCMethodDecl(Decl *D) {
1999 return D && isa<ObjCMethodDecl>(D);
2000 }
2001
2002 /// \brief Determine whether we can delay parsing the body of a function or
2003 /// function template until it is used, assuming we don't care about emitting
2004 /// code for that function.
2005 ///
2006 /// This will be \c false if we may need the body of the function in the
2007 /// middle of parsing an expression (where it's impractical to switch to
2008 /// parsing a different function), for instance, if it's constexpr in C++11
2009 /// or has an 'auto' return type in C++14. These cases are essentially bugs.
2010 bool canDelayFunctionBody(const Declarator &D);
2011
2012 /// \brief Determine whether we can skip parsing the body of a function
2013 /// definition, assuming we don't care about analyzing its body or emitting
2014 /// code for that function.
2015 ///
2016 /// This will be \c false only if we may need the body of the function in
2017 /// order to parse the rest of the program (for instance, if it is
2018 /// \c constexpr in C++11 or has an 'auto' return type in C++14).
2019 bool canSkipFunctionBody(Decl *D);
2020
2021 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope);
2022 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body);
2023 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation);
2024 Decl *ActOnSkippedFunctionBody(Decl *Decl);
2025 void ActOnFinishInlineFunctionDef(FunctionDecl *D);
2026
2027 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an
2028 /// attribute for which parsing is delayed.
2029 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs);
2030
2031 /// \brief Diagnose any unused parameters in the given sequence of
2032 /// ParmVarDecl pointers.
2033 void DiagnoseUnusedParameters(ArrayRef<ParmVarDecl *> Parameters);
2034
2035 /// \brief Diagnose whether the size of parameters or return value of a
2036 /// function or obj-c method definition is pass-by-value and larger than a
2037 /// specified threshold.
2038 void
2039 DiagnoseSizeOfParametersAndReturnValue(ArrayRef<ParmVarDecl *> Parameters,
2040 QualType ReturnTy, NamedDecl *D);
2041
2042 void DiagnoseInvalidJumps(Stmt *Body);
2043 Decl *ActOnFileScopeAsmDecl(Expr *expr,
2044 SourceLocation AsmLoc,
2045 SourceLocation RParenLoc);
2046
2047 /// \brief Handle a C++11 empty-declaration and attribute-declaration.
2048 Decl *ActOnEmptyDeclaration(Scope *S,
2049 AttributeList *AttrList,
2050 SourceLocation SemiLoc);
2051
2052 enum class ModuleDeclKind {
2053 Interface, ///< 'export module X;'
2054 Implementation, ///< 'module X;'
2055 Partition, ///< 'module partition X;'
2056 };
2057
2058 /// The parser has processed a module-declaration that begins the definition
2059 /// of a module interface or implementation.
2060 DeclGroupPtrTy ActOnModuleDecl(SourceLocation StartLoc,
2061 SourceLocation ModuleLoc, ModuleDeclKind MDK,
2062 ModuleIdPath Path);
2063
2064 /// \brief The parser has processed a module import declaration.
2065 ///
2066 /// \param AtLoc The location of the '@' symbol, if any.
2067 ///
2068 /// \param ImportLoc The location of the 'import' keyword.
2069 ///
2070 /// \param Path The module access path.
2071 DeclResult ActOnModuleImport(SourceLocation AtLoc, SourceLocation ImportLoc,
2072 ModuleIdPath Path);
2073
2074 /// \brief The parser has processed a module import translated from a
2075 /// #include or similar preprocessing directive.
2076 void ActOnModuleInclude(SourceLocation DirectiveLoc, Module *Mod);
2077 void BuildModuleInclude(SourceLocation DirectiveLoc, Module *Mod);
2078
2079 /// \brief The parsed has entered a submodule.
2080 void ActOnModuleBegin(SourceLocation DirectiveLoc, Module *Mod);
2081 /// \brief The parser has left a submodule.
2082 void ActOnModuleEnd(SourceLocation DirectiveLoc, Module *Mod);
2083
2084 /// \brief Create an implicit import of the given module at the given
2085 /// source location, for error recovery, if possible.
2086 ///
2087 /// This routine is typically used when an entity found by name lookup
2088 /// is actually hidden within a module that we know about but the user
2089 /// has forgotten to import.
2090 void createImplicitModuleImportForErrorRecovery(SourceLocation Loc,
2091 Module *Mod);
2092
2093 /// Kinds of missing import. Note, the values of these enumerators correspond
2094 /// to %select values in diagnostics.
2095 enum class MissingImportKind {
2096 Declaration,
2097 Definition,
2098 DefaultArgument,
2099 ExplicitSpecialization,
2100 PartialSpecialization
2101 };
2102
2103 /// \brief Diagnose that the specified declaration needs to be visible but
2104 /// isn't, and suggest a module import that would resolve the problem.
2105 void diagnoseMissingImport(SourceLocation Loc, NamedDecl *Decl,
2106 MissingImportKind MIK, bool Recover = true);
2107 void diagnoseMissingImport(SourceLocation Loc, NamedDecl *Decl,
2108 SourceLocation DeclLoc, ArrayRef<Module *> Modules,
2109 MissingImportKind MIK, bool Recover);
2110
2111 Decl *ActOnStartExportDecl(Scope *S, SourceLocation ExportLoc,
2112 SourceLocation LBraceLoc);
2113 Decl *ActOnFinishExportDecl(Scope *S, Decl *ExportDecl,
2114 SourceLocation RBraceLoc);
2115
2116 /// \brief We've found a use of a templated declaration that would trigger an
2117 /// implicit instantiation. Check that any relevant explicit specializations
2118 /// and partial specializations are visible, and diagnose if not.
2119 void checkSpecializationVisibility(SourceLocation Loc, NamedDecl *Spec);
2120
2121 /// \brief We've found a use of a template specialization that would select a
2122 /// partial specialization. Check that the partial specialization is visible,
2123 /// and diagnose if not.
2124 void checkPartialSpecializationVisibility(SourceLocation Loc,
2125 NamedDecl *Spec);
2126
2127 /// \brief Retrieve a suitable printing policy.
2128 PrintingPolicy getPrintingPolicy() const {
2129 return getPrintingPolicy(Context, PP);
2130 }
2131
2132 /// \brief Retrieve a suitable printing policy.
2133 static PrintingPolicy getPrintingPolicy(const ASTContext &Ctx,
2134 const Preprocessor &PP);
2135
2136 /// Scope actions.
2137 void ActOnPopScope(SourceLocation Loc, Scope *S);
2138 void ActOnTranslationUnitScope(Scope *S);
2139
2140 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, DeclSpec &DS,
2141 RecordDecl *&AnonRecord);
2142 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, DeclSpec &DS,
2143 MultiTemplateParamsArg TemplateParams,
2144 bool IsExplicitInstantiation,
2145 RecordDecl *&AnonRecord);
2146
2147 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS,
2148 AccessSpecifier AS,
2149 RecordDecl *Record,
2150 const PrintingPolicy &Policy);
2151
2152 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS,
2153 RecordDecl *Record);
2154
2155 /// Common ways to introduce type names without a tag for use in diagnostics.
2156 /// Keep in sync with err_tag_reference_non_tag.
2157 enum NonTagKind {
2158 NTK_NonStruct,
2159 NTK_NonClass,
2160 NTK_NonUnion,
2161 NTK_NonEnum,
2162 NTK_Typedef,
2163 NTK_TypeAlias,
2164 NTK_Template,
2165 NTK_TypeAliasTemplate,
2166 NTK_TemplateTemplateArgument,
2167 };
2168
2169 /// Given a non-tag type declaration, returns an enum useful for indicating
2170 /// what kind of non-tag type this is.
2171 NonTagKind getNonTagTypeDeclKind(const Decl *D, TagTypeKind TTK);
2172
2173 bool isAcceptableTagRedeclaration(const TagDecl *Previous,
2174 TagTypeKind NewTag, bool isDefinition,
2175 SourceLocation NewTagLoc,
2176 const IdentifierInfo *Name);
2177
2178 enum TagUseKind {
2179 TUK_Reference, // Reference to a tag: 'struct foo *X;'
2180 TUK_Declaration, // Fwd decl of a tag: 'struct foo;'
2181 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;'
2182 TUK_Friend // Friend declaration: 'friend struct foo;'
2183 };
2184
2185 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK,
2186 SourceLocation KWLoc, CXXScopeSpec &SS, IdentifierInfo *Name,
2187 SourceLocation NameLoc, AttributeList *Attr,
2188 AccessSpecifier AS, SourceLocation ModulePrivateLoc,
2189 MultiTemplateParamsArg TemplateParameterLists, bool &OwnedDecl,
2190 bool &IsDependent, SourceLocation ScopedEnumKWLoc,
2191 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType,
2192 bool IsTypeSpecifier, bool IsTemplateParamOrArg,
2193 SkipBodyInfo *SkipBody = nullptr);
2194
2195 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc,
2196 unsigned TagSpec, SourceLocation TagLoc,
2197 CXXScopeSpec &SS,
2198 IdentifierInfo *Name, SourceLocation NameLoc,
2199 AttributeList *Attr,
2200 MultiTemplateParamsArg TempParamLists);
2201
2202 TypeResult ActOnDependentTag(Scope *S,
2203 unsigned TagSpec,
2204 TagUseKind TUK,
2205 const CXXScopeSpec &SS,
2206 IdentifierInfo *Name,
2207 SourceLocation TagLoc,
2208 SourceLocation NameLoc);
2209
2210 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart,
2211 IdentifierInfo *ClassName,
2212 SmallVectorImpl<Decl *> &Decls);
2213 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart,
2214 Declarator &D, Expr *BitfieldWidth);
2215
2216 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart,
2217 Declarator &D, Expr *BitfieldWidth,
2218 InClassInitStyle InitStyle,
2219 AccessSpecifier AS);
2220 MSPropertyDecl *HandleMSProperty(Scope *S, RecordDecl *TagD,
2221 SourceLocation DeclStart,
2222 Declarator &D, Expr *BitfieldWidth,
2223 InClassInitStyle InitStyle,
2224 AccessSpecifier AS,
2225 AttributeList *MSPropertyAttr);
2226
2227 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T,
2228 TypeSourceInfo *TInfo,
2229 RecordDecl *Record, SourceLocation Loc,
2230 bool Mutable, Expr *BitfieldWidth,
2231 InClassInitStyle InitStyle,
2232 SourceLocation TSSL,
2233 AccessSpecifier AS, NamedDecl *PrevDecl,
2234 Declarator *D = nullptr);
2235
2236 bool CheckNontrivialField(FieldDecl *FD);
2237 void DiagnoseNontrivial(const CXXRecordDecl *Record, CXXSpecialMember CSM);
2238 bool SpecialMemberIsTrivial(CXXMethodDecl *MD, CXXSpecialMember CSM,
2239 bool Diagnose = false);
2240 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD);
2241 void ActOnLastBitfield(SourceLocation DeclStart,
2242 SmallVectorImpl<Decl *> &AllIvarDecls);
2243 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart,
2244 Declarator &D, Expr *BitfieldWidth,
2245 tok::ObjCKeywordKind visibility);
2246
2247 // This is used for both record definitions and ObjC interface declarations.
2248 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl,
2249 ArrayRef<Decl *> Fields,
2250 SourceLocation LBrac, SourceLocation RBrac,
2251 AttributeList *AttrList);
2252
2253 /// ActOnTagStartDefinition - Invoked when we have entered the
2254 /// scope of a tag's definition (e.g., for an enumeration, class,
2255 /// struct, or union).
2256 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl);
2257
2258 /// Perform ODR-like check for C/ObjC when merging tag types from modules.
2259 /// Differently from C++, actually parse the body and reject / error out
2260 /// in case of a structural mismatch.
2261 bool ActOnDuplicateDefinition(DeclSpec &DS, Decl *Prev,
2262 SkipBodyInfo &SkipBody);
2263
2264 typedef void *SkippedDefinitionContext;
2265
2266 /// \brief Invoked when we enter a tag definition that we're skipping.
2267 SkippedDefinitionContext ActOnTagStartSkippedDefinition(Scope *S, Decl *TD);
2268
2269 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl);
2270
2271 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a
2272 /// C++ record definition's base-specifiers clause and are starting its
2273 /// member declarations.
2274 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl,
2275 SourceLocation FinalLoc,
2276 bool IsFinalSpelledSealed,
2277 SourceLocation LBraceLoc);
2278
2279 /// ActOnTagFinishDefinition - Invoked once we have finished parsing
2280 /// the definition of a tag (enumeration, class, struct, or union).
2281 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl,
2282 SourceRange BraceRange);
2283
2284 void ActOnTagFinishSkippedDefinition(SkippedDefinitionContext Context);
2285
2286 void ActOnObjCContainerFinishDefinition();
2287
2288 /// \brief Invoked when we must temporarily exit the objective-c container
2289 /// scope for parsing/looking-up C constructs.
2290 ///
2291 /// Must be followed by a call to \see ActOnObjCReenterContainerContext
2292 void ActOnObjCTemporaryExitContainerContext(DeclContext *DC);
2293 void ActOnObjCReenterContainerContext(DeclContext *DC);
2294
2295 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable
2296 /// error parsing the definition of a tag.
2297 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl);
2298
2299 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum,
2300 EnumConstantDecl *LastEnumConst,
2301 SourceLocation IdLoc,
2302 IdentifierInfo *Id,
2303 Expr *val);
2304 bool CheckEnumUnderlyingType(TypeSourceInfo *TI);
2305 bool CheckEnumRedeclaration(SourceLocation EnumLoc, bool IsScoped,
2306 QualType EnumUnderlyingTy,
2307 bool EnumUnderlyingIsImplicit,
2308 const EnumDecl *Prev);
2309
2310 /// Determine whether the body of an anonymous enumeration should be skipped.
2311 /// \param II The name of the first enumerator.
2312 SkipBodyInfo shouldSkipAnonEnumBody(Scope *S, IdentifierInfo *II,
2313 SourceLocation IILoc);
2314
2315 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant,
2316 SourceLocation IdLoc, IdentifierInfo *Id,
2317 AttributeList *Attrs, SourceLocation EqualLoc,
2318 Expr *Val);
2319 void ActOnEnumBody(SourceLocation EnumLoc, SourceRange BraceRange,
2320 Decl *EnumDecl,
2321 ArrayRef<Decl *> Elements,
2322 Scope *S, AttributeList *Attr);
2323
2324 DeclContext *getContainingDC(DeclContext *DC);
2325
2326 /// Set the current declaration context until it gets popped.
2327 void PushDeclContext(Scope *S, DeclContext *DC);
2328 void PopDeclContext();
2329
2330 /// EnterDeclaratorContext - Used when we must lookup names in the context
2331 /// of a declarator's nested name specifier.
2332 void EnterDeclaratorContext(Scope *S, DeclContext *DC);
2333 void ExitDeclaratorContext(Scope *S);
2334
2335 /// Push the parameters of D, which must be a function, into scope.
2336 void ActOnReenterFunctionContext(Scope* S, Decl* D);
2337 void ActOnExitFunctionContext();
2338
2339 DeclContext *getFunctionLevelDeclContext();
2340
2341 /// getCurFunctionDecl - If inside of a function body, this returns a pointer
2342 /// to the function decl for the function being parsed. If we're currently
2343 /// in a 'block', this returns the containing context.
2344 FunctionDecl *getCurFunctionDecl();
2345
2346 /// getCurMethodDecl - If inside of a method body, this returns a pointer to
2347 /// the method decl for the method being parsed. If we're currently
2348 /// in a 'block', this returns the containing context.
2349 ObjCMethodDecl *getCurMethodDecl();
2350
2351 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method
2352 /// or C function we're in, otherwise return null. If we're currently
2353 /// in a 'block', this returns the containing context.
2354 NamedDecl *getCurFunctionOrMethodDecl();
2355
2356 /// Add this decl to the scope shadowed decl chains.
2357 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true);
2358
2359 /// \brief Make the given externally-produced declaration visible at the
2360 /// top level scope.
2361 ///
2362 /// \param D The externally-produced declaration to push.
2363 ///
2364 /// \param Name The name of the externally-produced declaration.
2365 void pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name);
2366
2367 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true
2368 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns
2369 /// true if 'D' belongs to the given declaration context.
2370 ///
2371 /// \param AllowInlineNamespace If \c true, allow the declaration to be in the
2372 /// enclosing namespace set of the context, rather than contained
2373 /// directly within it.
2374 bool isDeclInScope(NamedDecl *D, DeclContext *Ctx, Scope *S = nullptr,
2375 bool AllowInlineNamespace = false);
2376
2377 /// Finds the scope corresponding to the given decl context, if it
2378 /// happens to be an enclosing scope. Otherwise return NULL.
2379 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC);
2380
2381 /// Subroutines of ActOnDeclarator().
2382 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T,
2383 TypeSourceInfo *TInfo);
2384 bool isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New);
2385
2386 /// \brief Describes the kind of merge to perform for availability
2387 /// attributes (including "deprecated", "unavailable", and "availability").
2388 enum AvailabilityMergeKind {
2389 /// \brief Don't merge availability attributes at all.
2390 AMK_None,
2391 /// \brief Merge availability attributes for a redeclaration, which requires
2392 /// an exact match.
2393 AMK_Redeclaration,
2394 /// \brief Merge availability attributes for an override, which requires
2395 /// an exact match or a weakening of constraints.
2396 AMK_Override,
2397 /// \brief Merge availability attributes for an implementation of
2398 /// a protocol requirement.
2399 AMK_ProtocolImplementation,
2400 };
2401
2402 /// Attribute merging methods. Return true if a new attribute was added.
2403 AvailabilityAttr *mergeAvailabilityAttr(NamedDecl *D, SourceRange Range,
2404 IdentifierInfo *Platform,
2405 bool Implicit,
2406 VersionTuple Introduced,
2407 VersionTuple Deprecated,
2408 VersionTuple Obsoleted,
2409 bool IsUnavailable,
2410 StringRef Message,
2411 bool IsStrict, StringRef Replacement,
2412 AvailabilityMergeKind AMK,
2413 unsigned AttrSpellingListIndex);
2414 TypeVisibilityAttr *mergeTypeVisibilityAttr(Decl *D, SourceRange Range,
2415 TypeVisibilityAttr::VisibilityType Vis,
2416 unsigned AttrSpellingListIndex);
2417 VisibilityAttr *mergeVisibilityAttr(Decl *D, SourceRange Range,
2418 VisibilityAttr::VisibilityType Vis,
2419 unsigned AttrSpellingListIndex);
2420 UuidAttr *mergeUuidAttr(Decl *D, SourceRange Range,
2421 unsigned AttrSpellingListIndex, StringRef Uuid);
2422 DLLImportAttr *mergeDLLImportAttr(Decl *D, SourceRange Range,
2423 unsigned AttrSpellingListIndex);
2424 DLLExportAttr *mergeDLLExportAttr(Decl *D, SourceRange Range,
2425 unsigned AttrSpellingListIndex);
2426 MSInheritanceAttr *
2427 mergeMSInheritanceAttr(Decl *D, SourceRange Range, bool BestCase,
2428 unsigned AttrSpellingListIndex,
2429 MSInheritanceAttr::Spelling SemanticSpelling);
2430 FormatAttr *mergeFormatAttr(Decl *D, SourceRange Range,
2431 IdentifierInfo *Format, int FormatIdx,
2432 int FirstArg, unsigned AttrSpellingListIndex);
2433 SectionAttr *mergeSectionAttr(Decl *D, SourceRange Range, StringRef Name,
2434 unsigned AttrSpellingListIndex);
2435 AlwaysInlineAttr *mergeAlwaysInlineAttr(Decl *D, SourceRange Range,
2436 IdentifierInfo *Ident,
2437 unsigned AttrSpellingListIndex);
2438 MinSizeAttr *mergeMinSizeAttr(Decl *D, SourceRange Range,
2439 unsigned AttrSpellingListIndex);
2440 OptimizeNoneAttr *mergeOptimizeNoneAttr(Decl *D, SourceRange Range,
2441 unsigned AttrSpellingListIndex);
2442 InternalLinkageAttr *mergeInternalLinkageAttr(Decl *D, SourceRange Range,
2443 IdentifierInfo *Ident,
2444 unsigned AttrSpellingListIndex);
2445 CommonAttr *mergeCommonAttr(Decl *D, SourceRange Range, IdentifierInfo *Ident,
2446 unsigned AttrSpellingListIndex);
2447
2448 void mergeDeclAttributes(NamedDecl *New, Decl *Old,
2449 AvailabilityMergeKind AMK = AMK_Redeclaration);
2450 void MergeTypedefNameDecl(Scope *S, TypedefNameDecl *New,
2451 LookupResult &OldDecls);
2452 bool MergeFunctionDecl(FunctionDecl *New, NamedDecl *&Old, Scope *S,
2453 bool MergeTypeWithOld);
2454 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old,
2455 Scope *S, bool MergeTypeWithOld);
2456 void mergeObjCMethodDecls(ObjCMethodDecl *New, ObjCMethodDecl *Old);
2457 void MergeVarDecl(VarDecl *New, LookupResult &Previous);
2458 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old, bool MergeTypeWithOld);
2459 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old);
2460 bool checkVarDeclRedefinition(VarDecl *OldDefn, VarDecl *NewDefn);
2461 void notePreviousDefinition(const NamedDecl *Old, SourceLocation New);
2462 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old, Scope *S);
2463
2464 // AssignmentAction - This is used by all the assignment diagnostic functions
2465 // to represent what is actually causing the operation
2466 enum AssignmentAction {
2467 AA_Assigning,
2468 AA_Passing,
2469 AA_Returning,
2470 AA_Converting,
2471 AA_Initializing,
2472 AA_Sending,
2473 AA_Casting,
2474 AA_Passing_CFAudited
2475 };
2476
2477 /// C++ Overloading.
2478 enum OverloadKind {
2479 /// This is a legitimate overload: the existing declarations are
2480 /// functions or function templates with different signatures.
2481 Ovl_Overload,
2482
2483 /// This is not an overload because the signature exactly matches
2484 /// an existing declaration.
2485 Ovl_Match,
2486
2487 /// This is not an overload because the lookup results contain a
2488 /// non-function.
2489 Ovl_NonFunction
2490 };
2491 OverloadKind CheckOverload(Scope *S,
2492 FunctionDecl *New,
2493 const LookupResult &OldDecls,
2494 NamedDecl *&OldDecl,
2495 bool IsForUsingDecl);
2496 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl,
2497 bool ConsiderCudaAttrs = true);
2498
2499 /// \brief Checks availability of the function depending on the current
2500 /// function context.Inside an unavailable function,unavailability is ignored.
2501 ///
2502 /// \returns true if \p FD is unavailable and current context is inside
2503 /// an available function, false otherwise.
2504 bool isFunctionConsideredUnavailable(FunctionDecl *FD);
2505
2506 ImplicitConversionSequence
2507 TryImplicitConversion(Expr *From, QualType ToType,
2508 bool SuppressUserConversions,
2509 bool AllowExplicit,
2510 bool InOverloadResolution,
2511 bool CStyle,
2512 bool AllowObjCWritebackConversion);
2513
2514 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType);
2515 bool IsFloatingPointPromotion(QualType FromType, QualType ToType);
2516 bool IsComplexPromotion(QualType FromType, QualType ToType);
2517 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType,
2518 bool InOverloadResolution,
2519 QualType& ConvertedType, bool &IncompatibleObjC);
2520 bool isObjCPointerConversion(QualType FromType, QualType ToType,
2521 QualType& ConvertedType, bool &IncompatibleObjC);
2522 bool isObjCWritebackConversion(QualType FromType, QualType ToType,
2523 QualType &ConvertedType);
2524 bool IsBlockPointerConversion(QualType FromType, QualType ToType,
2525 QualType& ConvertedType);
2526 bool FunctionParamTypesAreEqual(const FunctionProtoType *OldType,
2527 const FunctionProtoType *NewType,
2528 unsigned *ArgPos = nullptr);
2529 void HandleFunctionTypeMismatch(PartialDiagnostic &PDiag,
2530 QualType FromType, QualType ToType);
2531
2532 void maybeExtendBlockObject(ExprResult &E);
2533 CastKind PrepareCastToObjCObjectPointer(ExprResult &E);
2534 bool CheckPointerConversion(Expr *From, QualType ToType,
2535 CastKind &Kind,
2536 CXXCastPath& BasePath,
2537 bool IgnoreBaseAccess,
2538 bool Diagnose = true);
2539 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType,
2540 bool InOverloadResolution,
2541 QualType &ConvertedType);
2542 bool CheckMemberPointerConversion(Expr *From, QualType ToType,
2543 CastKind &Kind,
2544 CXXCastPath &BasePath,
2545 bool IgnoreBaseAccess);
2546 bool IsQualificationConversion(QualType FromType, QualType ToType,
2547 bool CStyle, bool &ObjCLifetimeConversion);
2548 bool IsFunctionConversion(QualType FromType, QualType ToType,
2549 QualType &ResultTy);
2550 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType);
2551 bool isSameOrCompatibleFunctionType(CanQualType Param, CanQualType Arg);
2552
2553 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity,
2554 const VarDecl *NRVOCandidate,
2555 QualType ResultType,
2556 Expr *Value,
2557 bool AllowNRVO = true);
2558
2559 bool CanPerformCopyInitialization(const InitializedEntity &Entity,
2560 ExprResult Init);
2561 ExprResult PerformCopyInitialization(const InitializedEntity &Entity,
2562 SourceLocation EqualLoc,
2563 ExprResult Init,
2564 bool TopLevelOfInitList = false,
2565 bool AllowExplicit = false);
2566 ExprResult PerformObjectArgumentInitialization(Expr *From,
2567 NestedNameSpecifier *Qualifier,
2568 NamedDecl *FoundDecl,
2569 CXXMethodDecl *Method);
2570
2571 ExprResult PerformContextuallyConvertToBool(Expr *From);
2572 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From);
2573
2574 /// Contexts in which a converted constant expression is required.
2575 enum CCEKind {
2576 CCEK_CaseValue, ///< Expression in a case label.
2577 CCEK_Enumerator, ///< Enumerator value with fixed underlying type.
2578 CCEK_TemplateArg, ///< Value of a non-type template parameter.
2579 CCEK_NewExpr, ///< Constant expression in a noptr-new-declarator.
2580 CCEK_ConstexprIf ///< Condition in a constexpr if statement.
2581 };
2582 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T,
2583 llvm::APSInt &Value, CCEKind CCE);
2584 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T,
2585 APValue &Value, CCEKind CCE);
2586
2587 /// \brief Abstract base class used to perform a contextual implicit
2588 /// conversion from an expression to any type passing a filter.
2589 class ContextualImplicitConverter {
2590 public:
2591 bool Suppress;
2592 bool SuppressConversion;
2593
2594 ContextualImplicitConverter(bool Suppress = false,
2595 bool SuppressConversion = false)
2596 : Suppress(Suppress), SuppressConversion(SuppressConversion) {}
2597
2598 /// \brief Determine whether the specified type is a valid destination type
2599 /// for this conversion.
2600 virtual bool match(QualType T) = 0;
2601
2602 /// \brief Emits a diagnostic complaining that the expression does not have
2603 /// integral or enumeration type.
2604 virtual SemaDiagnosticBuilder
2605 diagnoseNoMatch(Sema &S, SourceLocation Loc, QualType T) = 0;
2606
2607 /// \brief Emits a diagnostic when the expression has incomplete class type.
2608 virtual SemaDiagnosticBuilder
2609 diagnoseIncomplete(Sema &S, SourceLocation Loc, QualType T) = 0;
2610
2611 /// \brief Emits a diagnostic when the only matching conversion function
2612 /// is explicit.
2613 virtual SemaDiagnosticBuilder diagnoseExplicitConv(
2614 Sema &S, SourceLocation Loc, QualType T, QualType ConvTy) = 0;
2615
2616 /// \brief Emits a note for the explicit conversion function.
2617 virtual SemaDiagnosticBuilder
2618 noteExplicitConv(Sema &S, CXXConversionDecl *Conv, QualType ConvTy) = 0;
2619
2620 /// \brief Emits a diagnostic when there are multiple possible conversion
2621 /// functions.
2622 virtual SemaDiagnosticBuilder
2623 diagnoseAmbiguous(Sema &S, SourceLocation Loc, QualType T) = 0;
2624
2625 /// \brief Emits a note for one of the candidate conversions.
2626 virtual SemaDiagnosticBuilder
2627 noteAmbiguous(Sema &S, CXXConversionDecl *Conv, QualType ConvTy) = 0;
2628
2629 /// \brief Emits a diagnostic when we picked a conversion function
2630 /// (for cases when we are not allowed to pick a conversion function).
2631 virtual SemaDiagnosticBuilder diagnoseConversion(
2632 Sema &S, SourceLocation Loc, QualType T, QualType ConvTy) = 0;
2633
2634 virtual ~ContextualImplicitConverter() {}
2635 };
2636
2637 class ICEConvertDiagnoser : public ContextualImplicitConverter {
2638 bool AllowScopedEnumerations;
2639
2640 public:
2641 ICEConvertDiagnoser(bool AllowScopedEnumerations,
2642 bool Suppress, bool SuppressConversion)
2643 : ContextualImplicitConverter(Suppress, SuppressConversion),
2644 AllowScopedEnumerations(AllowScopedEnumerations) {}
2645
2646 /// Match an integral or (possibly scoped) enumeration type.
2647 bool match(QualType T) override;
2648
2649 SemaDiagnosticBuilder
2650 diagnoseNoMatch(Sema &S, SourceLocation Loc, QualType T) override {
2651 return diagnoseNotInt(S, Loc, T);
2652 }
2653
2654 /// \brief Emits a diagnostic complaining that the expression does not have
2655 /// integral or enumeration type.
2656 virtual SemaDiagnosticBuilder
2657 diagnoseNotInt(Sema &S, SourceLocation Loc, QualType T) = 0;
2658 };
2659
2660 /// Perform a contextual implicit conversion.
2661 ExprResult PerformContextualImplicitConversion(
2662 SourceLocation Loc, Expr *FromE, ContextualImplicitConverter &Converter);
2663
2664
2665 enum ObjCSubscriptKind {
2666 OS_Array,
2667 OS_Dictionary,
2668 OS_Error
2669 };
2670 ObjCSubscriptKind CheckSubscriptingKind(Expr *FromE);
2671
2672 // Note that LK_String is intentionally after the other literals, as
2673 // this is used for diagnostics logic.
2674 enum ObjCLiteralKind {
2675 LK_Array,
2676 LK_Dictionary,
2677 LK_Numeric,
2678 LK_Boxed,
2679 LK_String,
2680 LK_Block,
2681 LK_None
2682 };
2683 ObjCLiteralKind CheckLiteralKind(Expr *FromE);
2684
2685 ExprResult PerformObjectMemberConversion(Expr *From,
2686 NestedNameSpecifier *Qualifier,
2687 NamedDecl *FoundDecl,
2688 NamedDecl *Member);
2689
2690 // Members have to be NamespaceDecl* or TranslationUnitDecl*.
2691 // TODO: make this is a typesafe union.
2692 typedef llvm::SmallSetVector<DeclContext *, 16> AssociatedNamespaceSet;
2693 typedef llvm::SmallSetVector<CXXRecordDecl *, 16> AssociatedClassSet;
2694
2695 void AddOverloadCandidate(FunctionDecl *Function,
2696 DeclAccessPair FoundDecl,
2697 ArrayRef<Expr *> Args,
2698 OverloadCandidateSet &CandidateSet,
2699 bool SuppressUserConversions = false,
2700 bool PartialOverloading = false,
2701 bool AllowExplicit = false,
2702 ConversionSequenceList EarlyConversions = None);
2703 void AddFunctionCandidates(const UnresolvedSetImpl &Functions,
2704 ArrayRef<Expr *> Args,
2705 OverloadCandidateSet &CandidateSet,
2706 TemplateArgumentListInfo *ExplicitTemplateArgs = nullptr,
2707 bool SuppressUserConversions = false,
2708 bool PartialOverloading = false,
2709 bool FirstArgumentIsBase = false);
2710 void AddMethodCandidate(DeclAccessPair FoundDecl,
2711 QualType ObjectType,
2712 Expr::Classification ObjectClassification,
2713 ArrayRef<Expr *> Args,
2714 OverloadCandidateSet& CandidateSet,
2715 bool SuppressUserConversion = false);
2716 void AddMethodCandidate(CXXMethodDecl *Method,
2717 DeclAccessPair FoundDecl,
2718 CXXRecordDecl *ActingContext, QualType ObjectType,
2719 Expr::Classification ObjectClassification,
2720 ArrayRef<Expr *> Args,
2721 OverloadCandidateSet& CandidateSet,
2722 bool SuppressUserConversions = false,
2723 bool PartialOverloading = false,
2724 ConversionSequenceList EarlyConversions = None);
2725 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl,
2726 DeclAccessPair FoundDecl,
2727 CXXRecordDecl *ActingContext,
2728 TemplateArgumentListInfo *ExplicitTemplateArgs,
2729 QualType ObjectType,
2730 Expr::Classification ObjectClassification,
2731 ArrayRef<Expr *> Args,
2732 OverloadCandidateSet& CandidateSet,
2733 bool SuppressUserConversions = false,
2734 bool PartialOverloading = false);
2735 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate,
2736 DeclAccessPair FoundDecl,
2737 TemplateArgumentListInfo *ExplicitTemplateArgs,
2738 ArrayRef<Expr *> Args,
2739 OverloadCandidateSet& CandidateSet,
2740 bool SuppressUserConversions = false,
2741 bool PartialOverloading = false);
2742 bool CheckNonDependentConversions(FunctionTemplateDecl *FunctionTemplate,
2743 ArrayRef<QualType> ParamTypes,
2744 ArrayRef<Expr *> Args,
2745 OverloadCandidateSet &CandidateSet,
2746 ConversionSequenceList &Conversions,
2747 bool SuppressUserConversions,
2748 CXXRecordDecl *ActingContext = nullptr,
2749 QualType ObjectType = QualType(),
2750 Expr::Classification
2751 ObjectClassification = {});
2752 void AddConversionCandidate(CXXConversionDecl *Conversion,
2753 DeclAccessPair FoundDecl,
2754 CXXRecordDecl *ActingContext,
2755 Expr *From, QualType ToType,
2756 OverloadCandidateSet& CandidateSet,
2757 bool AllowObjCConversionOnExplicit,
2758 bool AllowResultConversion = true);
2759 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate,
2760 DeclAccessPair FoundDecl,
2761 CXXRecordDecl *ActingContext,
2762 Expr *From, QualType ToType,
2763 OverloadCandidateSet &CandidateSet,
2764 bool AllowObjCConversionOnExplicit,
2765 bool AllowResultConversion = true);
2766 void AddSurrogateCandidate(CXXConversionDecl *Conversion,
2767 DeclAccessPair FoundDecl,
2768 CXXRecordDecl *ActingContext,
2769 const FunctionProtoType *Proto,
2770 Expr *Object, ArrayRef<Expr *> Args,
2771 OverloadCandidateSet& CandidateSet);
2772 void AddMemberOperatorCandidates(OverloadedOperatorKind Op,
2773 SourceLocation OpLoc, ArrayRef<Expr *> Args,
2774 OverloadCandidateSet& CandidateSet,
2775 SourceRange OpRange = SourceRange());
2776 void AddBuiltinCandidate(QualType *ParamTys, ArrayRef<Expr *> Args,
2777 OverloadCandidateSet& CandidateSet,
2778 bool IsAssignmentOperator = false,
2779 unsigned NumContextualBoolArguments = 0);
2780 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op,
2781 SourceLocation OpLoc, ArrayRef<Expr *> Args,
2782 OverloadCandidateSet& CandidateSet);
2783 void AddArgumentDependentLookupCandidates(DeclarationName Name,
2784 SourceLocation Loc,
2785 ArrayRef<Expr *> Args,
2786 TemplateArgumentListInfo *ExplicitTemplateArgs,
2787 OverloadCandidateSet& CandidateSet,
2788 bool PartialOverloading = false);
2789
2790 // Emit as a 'note' the specific overload candidate
2791 void NoteOverloadCandidate(NamedDecl *Found, FunctionDecl *Fn,
2792 QualType DestType = QualType(),
2793 bool TakingAddress = false);
2794
2795 // Emit as a series of 'note's all template and non-templates identified by
2796 // the expression Expr
2797 void NoteAllOverloadCandidates(Expr *E, QualType DestType = QualType(),
2798 bool TakingAddress = false);
2799
2800 /// Check the enable_if expressions on the given function. Returns the first
2801 /// failing attribute, or NULL if they were all successful.
2802 EnableIfAttr *CheckEnableIf(FunctionDecl *Function, ArrayRef<Expr *> Args,
2803 bool MissingImplicitThis = false);
2804
2805 /// Find the failed Boolean condition within a given Boolean
2806 /// constant expression, and describe it with a string.
2807 ///
2808 /// \param AllowTopLevelCond Whether to allow the result to be the
2809 /// complete top-level condition.
2810 std::pair<Expr *, std::string>
2811 findFailedBooleanCondition(Expr *Cond, bool AllowTopLevelCond);
2812
2813 /// Emit diagnostics for the diagnose_if attributes on Function, ignoring any
2814 /// non-ArgDependent DiagnoseIfAttrs.
2815 ///
2816 /// Argument-dependent diagnose_if attributes should be checked each time a
2817 /// function is used as a direct callee of a function call.
2818 ///
2819 /// Returns true if any errors were emitted.
2820 bool diagnoseArgDependentDiagnoseIfAttrs(const FunctionDecl *Function,
2821 const Expr *ThisArg,
2822 ArrayRef<const Expr *> Args,
2823 SourceLocation Loc);
2824
2825 /// Emit diagnostics for the diagnose_if attributes on Function, ignoring any
2826 /// ArgDependent DiagnoseIfAttrs.
2827 ///
2828 /// Argument-independent diagnose_if attributes should be checked on every use
2829 /// of a function.
2830 ///
2831 /// Returns true if any errors were emitted.
2832 bool diagnoseArgIndependentDiagnoseIfAttrs(const NamedDecl *ND,
2833 SourceLocation Loc);
2834
2835 /// Returns whether the given function's address can be taken or not,
2836 /// optionally emitting a diagnostic if the address can't be taken.
2837 ///
2838 /// Returns false if taking the address of the function is illegal.
2839 bool checkAddressOfFunctionIsAvailable(const FunctionDecl *Function,
2840 bool Complain = false,
2841 SourceLocation Loc = SourceLocation());
2842
2843 // [PossiblyAFunctionType] --> [Return]
2844 // NonFunctionType --> NonFunctionType
2845 // R (A) --> R(A)
2846 // R (*)(A) --> R (A)
2847 // R (&)(A) --> R (A)
2848 // R (S::*)(A) --> R (A)
2849 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType);
2850
2851 FunctionDecl *
2852 ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr,
2853 QualType TargetType,
2854 bool Complain,
2855 DeclAccessPair &Found,
2856 bool *pHadMultipleCandidates = nullptr);
2857
2858 FunctionDecl *
2859 resolveAddressOfOnlyViableOverloadCandidate(Expr *E,
2860 DeclAccessPair &FoundResult);
2861
2862 bool resolveAndFixAddressOfOnlyViableOverloadCandidate(
2863 ExprResult &SrcExpr, bool DoFunctionPointerConversion = false);
2864
2865 FunctionDecl *
2866 ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl,
2867 bool Complain = false,
2868 DeclAccessPair *Found = nullptr);
2869
2870 bool ResolveAndFixSingleFunctionTemplateSpecialization(
2871 ExprResult &SrcExpr,
2872 bool DoFunctionPointerConverion = false,
2873 bool Complain = false,
2874 SourceRange OpRangeForComplaining = SourceRange(),
2875 QualType DestTypeForComplaining = QualType(),
2876 unsigned DiagIDForComplaining = 0);
2877
2878
2879 Expr *FixOverloadedFunctionReference(Expr *E,
2880 DeclAccessPair FoundDecl,
2881 FunctionDecl *Fn);
2882 ExprResult FixOverloadedFunctionReference(ExprResult,
2883 DeclAccessPair FoundDecl,
2884 FunctionDecl *Fn);
2885
2886 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE,
2887 ArrayRef<Expr *> Args,
2888 OverloadCandidateSet &CandidateSet,
2889 bool PartialOverloading = false);
2890
2891 // An enum used to represent the different possible results of building a
2892 // range-based for loop.
2893 enum ForRangeStatus {
2894 FRS_Success,
2895 FRS_NoViableFunction,
2896 FRS_DiagnosticIssued
2897 };
2898
2899 ForRangeStatus BuildForRangeBeginEndCall(SourceLocation Loc,
2900 SourceLocation RangeLoc,
2901 const DeclarationNameInfo &NameInfo,
2902 LookupResult &MemberLookup,
2903 OverloadCandidateSet *CandidateSet,
2904 Expr *Range, ExprResult *CallExpr);
2905
2906 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn,
2907 UnresolvedLookupExpr *ULE,
2908 SourceLocation LParenLoc,
2909 MultiExprArg Args,
2910 SourceLocation RParenLoc,
2911 Expr *ExecConfig,
2912 bool AllowTypoCorrection=true,
2913 bool CalleesAddressIsTaken=false);
2914
2915 bool buildOverloadedCallSet(Scope *S, Expr *Fn, UnresolvedLookupExpr *ULE,
2916 MultiExprArg Args, SourceLocation RParenLoc,
2917 OverloadCandidateSet *CandidateSet,
2918 ExprResult *Result);
2919
2920 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc,
2921 UnaryOperatorKind Opc,
2922 const UnresolvedSetImpl &Fns,
2923 Expr *input, bool RequiresADL = true);
2924
2925 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc,
2926 BinaryOperatorKind Opc,
2927 const UnresolvedSetImpl &Fns,
2928 Expr *LHS, Expr *RHS,
2929 bool RequiresADL = true);
2930
2931 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc,
2932 SourceLocation RLoc,
2933 Expr *Base,Expr *Idx);
2934
2935 ExprResult
2936 BuildCallToMemberFunction(Scope *S, Expr *MemExpr,
2937 SourceLocation LParenLoc,
2938 MultiExprArg Args,
2939 SourceLocation RParenLoc);
2940 ExprResult
2941 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc,
2942 MultiExprArg Args,
2943 SourceLocation RParenLoc);
2944
2945 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base,
2946 SourceLocation OpLoc,
2947 bool *NoArrowOperatorFound = nullptr);
2948
2949 /// CheckCallReturnType - Checks that a call expression's return type is
2950 /// complete. Returns true on failure. The location passed in is the location
2951 /// that best represents the call.
2952 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc,
2953 CallExpr *CE, FunctionDecl *FD);
2954
2955 /// Helpers for dealing with blocks and functions.
2956 bool CheckParmsForFunctionDef(ArrayRef<ParmVarDecl *> Parameters,
2957 bool CheckParameterNames);
2958 void CheckCXXDefaultArguments(FunctionDecl *FD);
2959 void CheckExtraCXXDefaultArguments(Declarator &D);
2960 Scope *getNonFieldDeclScope(Scope *S);
2961
2962 /// \name Name lookup
2963 ///
2964 /// These routines provide name lookup that is used during semantic
2965 /// analysis to resolve the various kinds of names (identifiers,
2966 /// overloaded operator names, constructor names, etc.) into zero or
2967 /// more declarations within a particular scope. The major entry
2968 /// points are LookupName, which performs unqualified name lookup,
2969 /// and LookupQualifiedName, which performs qualified name lookup.
2970 ///
2971 /// All name lookup is performed based on some specific criteria,
2972 /// which specify what names will be visible to name lookup and how
2973 /// far name lookup should work. These criteria are important both
2974 /// for capturing language semantics (certain lookups will ignore
2975 /// certain names, for example) and for performance, since name
2976 /// lookup is often a bottleneck in the compilation of C++. Name
2977 /// lookup criteria is specified via the LookupCriteria enumeration.
2978 ///
2979 /// The results of name lookup can vary based on the kind of name
2980 /// lookup performed, the current language, and the translation
2981 /// unit. In C, for example, name lookup will either return nothing
2982 /// (no entity found) or a single declaration. In C++, name lookup
2983 /// can additionally refer to a set of overloaded functions or
2984 /// result in an ambiguity. All of the possible results of name
2985 /// lookup are captured by the LookupResult class, which provides
2986 /// the ability to distinguish among them.
2987 //@{
2988
2989 /// @brief Describes the kind of name lookup to perform.
2990 enum LookupNameKind {
2991 /// Ordinary name lookup, which finds ordinary names (functions,
2992 /// variables, typedefs, etc.) in C and most kinds of names
2993 /// (functions, variables, members, types, etc.) in C++.
2994 LookupOrdinaryName = 0,
2995 /// Tag name lookup, which finds the names of enums, classes,
2996 /// structs, and unions.
2997 LookupTagName,
2998 /// Label name lookup.
2999 LookupLabel,
3000 /// Member name lookup, which finds the names of
3001 /// class/struct/union members.
3002 LookupMemberName,
3003 /// Look up of an operator name (e.g., operator+) for use with
3004 /// operator overloading. This lookup is similar to ordinary name
3005 /// lookup, but will ignore any declarations that are class members.
3006 LookupOperatorName,
3007 /// Look up of a name that precedes the '::' scope resolution
3008 /// operator in C++. This lookup completely ignores operator, object,
3009 /// function, and enumerator names (C++ [basic.lookup.qual]p1).
3010 LookupNestedNameSpecifierName,
3011 /// Look up a namespace name within a C++ using directive or
3012 /// namespace alias definition, ignoring non-namespace names (C++
3013 /// [basic.lookup.udir]p1).
3014 LookupNamespaceName,
3015 /// Look up all declarations in a scope with the given name,
3016 /// including resolved using declarations. This is appropriate
3017 /// for checking redeclarations for a using declaration.
3018 LookupUsingDeclName,
3019 /// Look up an ordinary name that is going to be redeclared as a
3020 /// name with linkage. This lookup ignores any declarations that
3021 /// are outside of the current scope unless they have linkage. See
3022 /// C99 6.2.2p4-5 and C++ [basic.link]p6.
3023 LookupRedeclarationWithLinkage,
3024 /// Look up a friend of a local class. This lookup does not look
3025 /// outside the innermost non-class scope. See C++11 [class.friend]p11.
3026 LookupLocalFriendName,
3027 /// Look up the name of an Objective-C protocol.
3028 LookupObjCProtocolName,
3029 /// Look up implicit 'self' parameter of an objective-c method.
3030 LookupObjCImplicitSelfParam,
3031 /// \brief Look up the name of an OpenMP user-defined reduction operation.
3032 LookupOMPReductionName,
3033 /// \brief Look up any declaration with any name.
3034 LookupAnyName
3035 };
3036
3037 /// \brief Specifies whether (or how) name lookup is being performed for a
3038 /// redeclaration (vs. a reference).
3039 enum RedeclarationKind {
3040 /// \brief The lookup is a reference to this name that is not for the
3041 /// purpose of redeclaring the name.
3042 NotForRedeclaration = 0,
3043 /// \brief The lookup results will be used for redeclaration of a name,
3044 /// if an entity by that name already exists and is visible.
3045 ForVisibleRedeclaration,
3046 /// \brief The lookup results will be used for redeclaration of a name
3047 /// with external linkage; non-visible lookup results with external linkage
3048 /// may also be found.
3049 ForExternalRedeclaration
3050 };
3051
3052 RedeclarationKind forRedeclarationInCurContext() {
3053 // A declaration with an owning module for linkage can never link against
3054 // anything that is not visible. We don't need to check linkage here; if
3055 // the context has internal linkage, redeclaration lookup won't find things
3056 // from other TUs, and we can't safely compute linkage yet in general.
3057 if (cast<Decl>(CurContext)
3058 ->getOwningModuleForLinkage(/*IgnoreLinkage*/true))
3059 return ForVisibleRedeclaration;
3060 return ForExternalRedeclaration;
3061 }
3062
3063 /// \brief The possible outcomes of name lookup for a literal operator.
3064 enum LiteralOperatorLookupResult {
3065 /// \brief The lookup resulted in an error.
3066 LOLR_Error,
3067 /// \brief The lookup found no match but no diagnostic was issued.
3068 LOLR_ErrorNoDiagnostic,
3069 /// \brief The lookup found a single 'cooked' literal operator, which
3070 /// expects a normal literal to be built and passed to it.
3071 LOLR_Cooked,
3072 /// \brief The lookup found a single 'raw' literal operator, which expects
3073 /// a string literal containing the spelling of the literal token.
3074 LOLR_Raw,
3075 /// \brief The lookup found an overload set of literal operator templates,
3076 /// which expect the characters of the spelling of the literal token to be
3077 /// passed as a non-type template argument pack.
3078 LOLR_Template,
3079 /// \brief The lookup found an overload set of literal operator templates,
3080 /// which expect the character type and characters of the spelling of the
3081 /// string literal token to be passed as template arguments.
3082 LOLR_StringTemplate
3083 };
3084
3085 SpecialMemberOverloadResult LookupSpecialMember(CXXRecordDecl *D,
3086 CXXSpecialMember SM,
3087 bool ConstArg,
3088 bool VolatileArg,
3089 bool RValueThis,
3090 bool ConstThis,
3091 bool VolatileThis);
3092
3093 typedef std::function<void(const TypoCorrection &)> TypoDiagnosticGenerator;
3094 typedef std::function<ExprResult(Sema &, TypoExpr *, TypoCorrection)>
3095 TypoRecoveryCallback;
3096
3097private:
3098 bool CppLookupName(LookupResult &R, Scope *S);
3099
3100 struct TypoExprState {
3101 std::unique_ptr<TypoCorrectionConsumer> Consumer;
3102 TypoDiagnosticGenerator DiagHandler;
3103 TypoRecoveryCallback RecoveryHandler;
3104 TypoExprState();
3105 TypoExprState(TypoExprState &&other) noexcept;
3106 TypoExprState &operator=(TypoExprState &&other) noexcept;
3107 };
3108
3109 /// \brief The set of unhandled TypoExprs and their associated state.
3110 llvm::MapVector<TypoExpr *, TypoExprState> DelayedTypos;
3111
3112 /// \brief Creates a new TypoExpr AST node.
3113 TypoExpr *createDelayedTypo(std::unique_ptr<TypoCorrectionConsumer> TCC,
3114 TypoDiagnosticGenerator TDG,
3115 TypoRecoveryCallback TRC);
3116
3117 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls.
3118 //
3119 // The boolean value will be true to indicate that the namespace was loaded
3120 // from an AST/PCH file, or false otherwise.
3121 llvm::MapVector<NamespaceDecl*, bool> KnownNamespaces;
3122
3123 /// \brief Whether we have already loaded known namespaces from an extenal
3124 /// source.
3125 bool LoadedExternalKnownNamespaces;
3126
3127 /// \brief Helper for CorrectTypo and CorrectTypoDelayed used to create and
3128 /// populate a new TypoCorrectionConsumer. Returns nullptr if typo correction
3129 /// should be skipped entirely.
3130 std::unique_ptr<TypoCorrectionConsumer>
3131 makeTypoCorrectionConsumer(const DeclarationNameInfo &Typo,
3132 Sema::LookupNameKind LookupKind, Scope *S,
3133 CXXScopeSpec *SS,
3134 std::unique_ptr<CorrectionCandidateCallback> CCC,
3135 DeclContext *MemberContext, bool EnteringContext,
3136 const ObjCObjectPointerType *OPT,
3137 bool ErrorRecovery);
3138
3139public:
3140 const TypoExprState &getTypoExprState(TypoExpr *TE) const;
3141
3142 /// \brief Clears the state of the given TypoExpr.
3143 void clearDelayedTypo(TypoExpr *TE);
3144
3145 /// \brief Look up a name, looking for a single declaration. Return
3146 /// null if the results were absent, ambiguous, or overloaded.
3147 ///
3148 /// It is preferable to use the elaborated form and explicitly handle
3149 /// ambiguity and overloaded.
3150 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name,
3151 SourceLocation Loc,
3152 LookupNameKind NameKind,
3153 RedeclarationKind Redecl
3154 = NotForRedeclaration);
3155 bool LookupName(LookupResult &R, Scope *S,
3156 bool AllowBuiltinCreation = false);
3157 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx,
3158 bool InUnqualifiedLookup = false);
3159 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx,
3160 CXXScopeSpec &SS);
3161 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS,
3162 bool AllowBuiltinCreation = false,
3163 bool EnteringContext = false);
3164 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc,
3165 RedeclarationKind Redecl
3166 = NotForRedeclaration);
3167 bool LookupInSuper(LookupResult &R, CXXRecordDecl *Class);
3168
3169 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S,
3170 QualType T1, QualType T2,
3171 UnresolvedSetImpl &Functions);
3172
3173 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc,
3174 SourceLocation GnuLabelLoc = SourceLocation());
3175
3176 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class);
3177 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class);
3178 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class,
3179 unsigned Quals);
3180 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals,
3181 bool RValueThis, unsigned ThisQuals);
3182 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class,
3183 unsigned Quals);
3184 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, unsigned Quals,
3185 bool RValueThis, unsigned ThisQuals);
3186 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class);
3187
3188 bool checkLiteralOperatorId(const CXXScopeSpec &SS, const UnqualifiedId &Id);
3189 LiteralOperatorLookupResult LookupLiteralOperator(Scope *S, LookupResult &R,
3190 ArrayRef<QualType> ArgTys,
3191 bool AllowRaw,
3192 bool AllowTemplate,
3193 bool AllowStringTemplate,
3194 bool DiagnoseMissing);
3195 bool isKnownName(StringRef name);
3196
3197 void ArgumentDependentLookup(DeclarationName Name, SourceLocation Loc,
3198 ArrayRef<Expr *> Args, ADLResult &Functions);
3199
3200 void LookupVisibleDecls(Scope *S, LookupNameKind Kind,
3201 VisibleDeclConsumer &Consumer,
3202 bool IncludeGlobalScope = true);
3203 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind,
3204 VisibleDeclConsumer &Consumer,
3205 bool IncludeGlobalScope = true,
3206 bool IncludeDependentBases = false);
3207
3208 enum CorrectTypoKind {
3209 CTK_NonError, // CorrectTypo used in a non error recovery situation.
3210 CTK_ErrorRecovery // CorrectTypo used in normal error recovery.
3211 };
3212
3213 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo,
3214 Sema::LookupNameKind LookupKind,
3215 Scope *S, CXXScopeSpec *SS,
3216 std::unique_ptr<CorrectionCandidateCallback> CCC,
3217 CorrectTypoKind Mode,
3218 DeclContext *MemberContext = nullptr,
3219 bool EnteringContext = false,
3220 const ObjCObjectPointerType *OPT = nullptr,
3221 bool RecordFailure = true);
3222
3223 TypoExpr *CorrectTypoDelayed(const DeclarationNameInfo &Typo,
3224 Sema::LookupNameKind LookupKind, Scope *S,
3225 CXXScopeSpec *SS,
3226 std::unique_ptr<CorrectionCandidateCallback> CCC,
3227 TypoDiagnosticGenerator TDG,
3228 TypoRecoveryCallback TRC, CorrectTypoKind Mode,
3229 DeclContext *MemberContext = nullptr,
3230 bool EnteringContext = false,
3231 const ObjCObjectPointerType *OPT = nullptr);
3232
3233 /// \brief Process any TypoExprs in the given Expr and its children,
3234 /// generating diagnostics as appropriate and returning a new Expr if there
3235 /// were typos that were all successfully corrected and ExprError if one or
3236 /// more typos could not be corrected.
3237 ///
3238 /// \param E The Expr to check for TypoExprs.
3239 ///
3240 /// \param InitDecl A VarDecl to avoid because the Expr being corrected is its
3241 /// initializer.
3242 ///
3243 /// \param Filter A function applied to a newly rebuilt Expr to determine if
3244 /// it is an acceptable/usable result from a single combination of typo
3245 /// corrections. As long as the filter returns ExprError, different
3246 /// combinations of corrections will be tried until all are exhausted.
3247 ExprResult
3248 CorrectDelayedTyposInExpr(Expr *E, VarDecl *InitDecl = nullptr,
3249 llvm::function_ref<ExprResult(Expr *)> Filter =
3250 [](Expr *E) -> ExprResult { return E; });
3251
3252 ExprResult
3253 CorrectDelayedTyposInExpr(Expr *E,
3254 llvm::function_ref<ExprResult(Expr *)> Filter) {
3255 return CorrectDelayedTyposInExpr(E, nullptr, Filter);
3256 }
3257
3258 ExprResult
3259 CorrectDelayedTyposInExpr(ExprResult ER, VarDecl *InitDecl = nullptr,
3260 llvm::function_ref<ExprResult(Expr *)> Filter =
3261 [](Expr *E) -> ExprResult { return E; }) {
3262 return ER.isInvalid() ? ER : CorrectDelayedTyposInExpr(ER.get(), Filter);
3263 }
3264
3265 ExprResult
3266 CorrectDelayedTyposInExpr(ExprResult ER,
3267 llvm::function_ref<ExprResult(Expr *)> Filter) {
3268 return CorrectDelayedTyposInExpr(ER, nullptr, Filter);
3269 }
3270
3271 void diagnoseTypo(const TypoCorrection &Correction,
3272 const PartialDiagnostic &TypoDiag,
3273 bool ErrorRecovery = true);
3274
3275 void diagnoseTypo(const TypoCorrection &Correction,
3276 const PartialDiagnostic &TypoDiag,
3277 const PartialDiagnostic &PrevNote,
3278 bool ErrorRecovery = true);
3279
3280 void MarkTypoCorrectedFunctionDefinition(const NamedDecl *F);
3281
3282 void FindAssociatedClassesAndNamespaces(SourceLocation InstantiationLoc,
3283 ArrayRef<Expr *> Args,
3284 AssociatedNamespaceSet &AssociatedNamespaces,
3285 AssociatedClassSet &AssociatedClasses);
3286
3287 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S,
3288 bool ConsiderLinkage, bool AllowInlineNamespace);
3289
3290 bool CheckRedeclarationModuleOwnership(NamedDecl *New, NamedDecl *Old);
3291
3292 void DiagnoseAmbiguousLookup(LookupResult &Result);
3293 //@}
3294
3295 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id,
3296 SourceLocation IdLoc,
3297 bool TypoCorrection = false);
3298 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID,
3299 Scope *S, bool ForRedeclaration,
3300 SourceLocation Loc);
3301 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II,
3302 Scope *S);
3303 void AddKnownFunctionAttributes(FunctionDecl *FD);
3304
3305 // More parsing and symbol table subroutines.
3306
3307 void ProcessPragmaWeak(Scope *S, Decl *D);
3308 // Decl attributes - this routine is the top level dispatcher.
3309 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD);
3310 // Helper for delayed processing of attributes.
3311 void ProcessDeclAttributeDelayed(Decl *D, const AttributeList *AttrList);
3312 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL,
3313 bool IncludeCXX11Attributes = true);
3314 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl,
3315 const AttributeList *AttrList);
3316
3317 void checkUnusedDeclAttributes(Declarator &D);
3318
3319 /// Determine if type T is a valid subject for a nonnull and similar
3320 /// attributes. By default, we look through references (the behavior used by
3321 /// nonnull), but if the second parameter is true, then we treat a reference
3322 /// type as valid.
3323 bool isValidPointerAttrType(QualType T, bool RefOkay = false);
3324
3325 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value);
3326 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC,
3327 const FunctionDecl *FD = nullptr);
3328 bool CheckNoReturnAttr(const AttributeList &attr);
3329 bool CheckNoCallerSavedRegsAttr(const AttributeList &attr);
3330 bool checkStringLiteralArgumentAttr(const AttributeList &Attr,
3331 unsigned ArgNum, StringRef &Str,
3332 SourceLocation *ArgLocation = nullptr);
3333 bool checkSectionName(SourceLocation LiteralLoc, StringRef Str);
3334 bool checkTargetAttr(SourceLocation LiteralLoc, StringRef Str);
3335 bool checkMSInheritanceAttrOnDefinition(
3336 CXXRecordDecl *RD, SourceRange Range, bool BestCase,
3337 MSInheritanceAttr::Spelling SemanticSpelling);
3338
3339 void CheckAlignasUnderalignment(Decl *D);
3340
3341 /// Adjust the calling convention of a method to be the ABI default if it
3342 /// wasn't specified explicitly. This handles method types formed from
3343 /// function type typedefs and typename template arguments.
3344 void adjustMemberFunctionCC(QualType &T, bool IsStatic, bool IsCtorOrDtor,
3345 SourceLocation Loc);
3346
3347 // Check if there is an explicit attribute, but only look through parens.
3348 // The intent is to look for an attribute on the current declarator, but not
3349 // one that came from a typedef.
3350 bool hasExplicitCallingConv(QualType &T);
3351
3352 /// Get the outermost AttributedType node that sets a calling convention.
3353 /// Valid types should not have multiple attributes with different CCs.
3354 const AttributedType *getCallingConvAttributedType(QualType T) const;
3355
3356 /// Check whether a nullability type specifier can be added to the given
3357 /// type.
3358 ///
3359 /// \param type The type to which the nullability specifier will be
3360 /// added. On success, this type will be updated appropriately.
3361 ///
3362 /// \param nullability The nullability specifier to add.
3363 ///
3364 /// \param nullabilityLoc The location of the nullability specifier.
3365 ///
3366 /// \param isContextSensitive Whether this nullability specifier was
3367 /// written as a context-sensitive keyword (in an Objective-C
3368 /// method) or an Objective-C property attribute, rather than as an
3369 /// underscored type specifier.
3370 ///
3371 /// \param allowArrayTypes Whether to accept nullability specifiers on an
3372 /// array type (e.g., because it will decay to a pointer).
3373 ///
3374 /// \returns true if nullability cannot be applied, false otherwise.
3375 bool checkNullabilityTypeSpecifier(QualType &type, NullabilityKind nullability,
3376 SourceLocation nullabilityLoc,
3377 bool isContextSensitive,
3378 bool allowArrayTypes);
3379
3380 /// \brief Stmt attributes - this routine is the top level dispatcher.
3381 StmtResult ProcessStmtAttributes(Stmt *Stmt, AttributeList *Attrs,
3382 SourceRange Range);
3383
3384 void WarnConflictingTypedMethods(ObjCMethodDecl *Method,
3385 ObjCMethodDecl *MethodDecl,
3386 bool IsProtocolMethodDecl);
3387
3388 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method,
3389 ObjCMethodDecl *Overridden,
3390 bool IsProtocolMethodDecl);
3391
3392 /// WarnExactTypedMethods - This routine issues a warning if method
3393 /// implementation declaration matches exactly that of its declaration.
3394 void WarnExactTypedMethods(ObjCMethodDecl *Method,
3395 ObjCMethodDecl *MethodDecl,
3396 bool IsProtocolMethodDecl);
3397
3398 typedef llvm::SmallPtrSet<Selector, 8> SelectorSet;
3399
3400 /// CheckImplementationIvars - This routine checks if the instance variables
3401 /// listed in the implelementation match those listed in the interface.
3402 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl,
3403 ObjCIvarDecl **Fields, unsigned nIvars,
3404 SourceLocation Loc);
3405
3406 /// ImplMethodsVsClassMethods - This is main routine to warn if any method
3407 /// remains unimplemented in the class or category \@implementation.
3408 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl,
3409 ObjCContainerDecl* IDecl,
3410 bool IncompleteImpl = false);
3411
3412 /// DiagnoseUnimplementedProperties - This routine warns on those properties
3413 /// which must be implemented by this implementation.
3414 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl,
3415 ObjCContainerDecl *CDecl,
3416 bool SynthesizeProperties);
3417
3418 /// Diagnose any null-resettable synthesized setters.
3419 void diagnoseNullResettableSynthesizedSetters(const ObjCImplDecl *impDecl);
3420
3421 /// DefaultSynthesizeProperties - This routine default synthesizes all
3422 /// properties which must be synthesized in the class's \@implementation.
3423 void DefaultSynthesizeProperties(Scope *S, ObjCImplDecl *IMPDecl,
3424 ObjCInterfaceDecl *IDecl,
3425 SourceLocation AtEnd);
3426 void DefaultSynthesizeProperties(Scope *S, Decl *D, SourceLocation AtEnd);
3427
3428 /// IvarBacksCurrentMethodAccessor - This routine returns 'true' if 'IV' is
3429 /// an ivar synthesized for 'Method' and 'Method' is a property accessor
3430 /// declared in class 'IFace'.
3431 bool IvarBacksCurrentMethodAccessor(ObjCInterfaceDecl *IFace,
3432 ObjCMethodDecl *Method, ObjCIvarDecl *IV);
3433
3434 /// DiagnoseUnusedBackingIvarInAccessor - Issue an 'unused' warning if ivar which
3435 /// backs the property is not used in the property's accessor.
3436 void DiagnoseUnusedBackingIvarInAccessor(Scope *S,
3437 const ObjCImplementationDecl *ImplD);
3438
3439 /// GetIvarBackingPropertyAccessor - If method is a property setter/getter and
3440 /// it property has a backing ivar, returns this ivar; otherwise, returns NULL.
3441 /// It also returns ivar's property on success.
3442 ObjCIvarDecl *GetIvarBackingPropertyAccessor(const ObjCMethodDecl *Method,
3443 const ObjCPropertyDecl *&PDecl) const;
3444
3445 /// Called by ActOnProperty to handle \@property declarations in
3446 /// class extensions.
3447 ObjCPropertyDecl *HandlePropertyInClassExtension(Scope *S,
3448 SourceLocation AtLoc,
3449 SourceLocation LParenLoc,
3450 FieldDeclarator &FD,
3451 Selector GetterSel,
3452 SourceLocation GetterNameLoc,
3453 Selector SetterSel,
3454 SourceLocation SetterNameLoc,
3455 const bool isReadWrite,
3456 unsigned &Attributes,
3457 const unsigned AttributesAsWritten,
3458 QualType T,
3459 TypeSourceInfo *TSI,
3460 tok::ObjCKeywordKind MethodImplKind);
3461
3462 /// Called by ActOnProperty and HandlePropertyInClassExtension to
3463 /// handle creating the ObjcPropertyDecl for a category or \@interface.
3464 ObjCPropertyDecl *CreatePropertyDecl(Scope *S,
3465 ObjCContainerDecl *CDecl,
3466 SourceLocation AtLoc,
3467 SourceLocation LParenLoc,
3468 FieldDeclarator &FD,
3469 Selector GetterSel,
3470 SourceLocation GetterNameLoc,
3471 Selector SetterSel,
3472 SourceLocation SetterNameLoc,
3473 const bool isReadWrite,
3474 const unsigned Attributes,
3475 const unsigned AttributesAsWritten,
3476 QualType T,
3477 TypeSourceInfo *TSI,
3478 tok::ObjCKeywordKind MethodImplKind,
3479 DeclContext *lexicalDC = nullptr);
3480
3481 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via
3482 /// warning) when atomic property has one but not the other user-declared
3483 /// setter or getter.
3484 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl,
3485 ObjCInterfaceDecl* IDecl);
3486
3487 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D);
3488
3489 void DiagnoseMissingDesignatedInitOverrides(
3490 const ObjCImplementationDecl *ImplD,
3491 const ObjCInterfaceDecl *IFD);
3492
3493 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID);
3494
3495 enum MethodMatchStrategy {
3496 MMS_loose,
3497 MMS_strict
3498 };
3499
3500 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns
3501 /// true, or false, accordingly.
3502 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method,
3503 const ObjCMethodDecl *PrevMethod,
3504 MethodMatchStrategy strategy = MMS_strict);
3505
3506 /// MatchAllMethodDeclarations - Check methods declaraed in interface or
3507 /// or protocol against those declared in their implementations.
3508 void MatchAllMethodDeclarations(const SelectorSet &InsMap,
3509 const SelectorSet &ClsMap,
3510 SelectorSet &InsMapSeen,
3511 SelectorSet &ClsMapSeen,
3512 ObjCImplDecl* IMPDecl,
3513 ObjCContainerDecl* IDecl,
3514 bool &IncompleteImpl,
3515 bool ImmediateClass,
3516 bool WarnCategoryMethodImpl=false);
3517
3518 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in
3519 /// category matches with those implemented in its primary class and
3520 /// warns each time an exact match is found.
3521 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP);
3522
3523 /// \brief Add the given method to the list of globally-known methods.
3524 void addMethodToGlobalList(ObjCMethodList *List, ObjCMethodDecl *Method);
3525
3526private:
3527 /// AddMethodToGlobalPool - Add an instance or factory method to the global
3528 /// pool. See descriptoin of AddInstanceMethodToGlobalPool.
3529 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance);
3530
3531 /// LookupMethodInGlobalPool - Returns the instance or factory method and
3532 /// optionally warns if there are multiple signatures.
3533 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R,
3534 bool receiverIdOrClass,
3535 bool instance);
3536
3537public:
3538 /// \brief - Returns instance or factory methods in global method pool for
3539 /// given selector. It checks the desired kind first, if none is found, and
3540 /// parameter checkTheOther is set, it then checks the other kind. If no such
3541 /// method or only one method is found, function returns false; otherwise, it
3542 /// returns true.
3543 bool
3544 CollectMultipleMethodsInGlobalPool(Selector Sel,
3545 SmallVectorImpl<ObjCMethodDecl*>& Methods,
3546 bool InstanceFirst, bool CheckTheOther,
3547 const ObjCObjectType *TypeBound = nullptr);
3548
3549 bool
3550 AreMultipleMethodsInGlobalPool(Selector Sel, ObjCMethodDecl *BestMethod,
3551 SourceRange R, bool receiverIdOrClass,
3552 SmallVectorImpl<ObjCMethodDecl*>& Methods);
3553
3554 void
3555 DiagnoseMultipleMethodInGlobalPool(SmallVectorImpl<ObjCMethodDecl*> &Methods,
3556 Selector Sel, SourceRange R,
3557 bool receiverIdOrClass);
3558
3559private:
3560 /// \brief - Returns a selector which best matches given argument list or
3561 /// nullptr if none could be found
3562 ObjCMethodDecl *SelectBestMethod(Selector Sel, MultiExprArg Args,
3563 bool IsInstance,
3564 SmallVectorImpl<ObjCMethodDecl*>& Methods);
3565
3566
3567 /// \brief Record the typo correction failure and return an empty correction.
3568 TypoCorrection FailedCorrection(IdentifierInfo *Typo, SourceLocation TypoLoc,
3569 bool RecordFailure = true) {
3570 if (RecordFailure)
3571 TypoCorrectionFailures[Typo].insert(TypoLoc);
3572 return TypoCorrection();
3573 }
3574
3575public:
3576 /// AddInstanceMethodToGlobalPool - All instance methods in a translation
3577 /// unit are added to a global pool. This allows us to efficiently associate
3578 /// a selector with a method declaraation for purposes of typechecking
3579 /// messages sent to "id" (where the class of the object is unknown).
3580 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) {
3581 AddMethodToGlobalPool(Method, impl, /*instance*/true);
3582 }
3583
3584 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods.
3585 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) {
3586 AddMethodToGlobalPool(Method, impl, /*instance*/false);
3587 }
3588
3589 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global
3590 /// pool.
3591 void AddAnyMethodToGlobalPool(Decl *D);
3592
3593 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if
3594 /// there are multiple signatures.
3595 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R,
3596 bool receiverIdOrClass=false) {
3597 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass,
3598 /*instance*/true);
3599 }
3600
3601 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if
3602 /// there are multiple signatures.
3603 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R,
3604 bool receiverIdOrClass=false) {
3605 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass,
3606 /*instance*/false);
3607 }
3608
3609 const ObjCMethodDecl *SelectorsForTypoCorrection(Selector Sel,
3610 QualType ObjectType=QualType());
3611 /// LookupImplementedMethodInGlobalPool - Returns the method which has an
3612 /// implementation.
3613 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel);
3614
3615 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require
3616 /// initialization.
3617 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI,
3618 SmallVectorImpl<ObjCIvarDecl*> &Ivars);
3619
3620 //===--------------------------------------------------------------------===//
3621 // Statement Parsing Callbacks: SemaStmt.cpp.
3622public:
3623 class FullExprArg {
3624 public:
3625 FullExprArg() : E(nullptr) { }
3626 FullExprArg(Sema &actions) : E(nullptr) { }
3627
3628 ExprResult release() {
3629 return E;
3630 }
3631
3632 Expr *get() const { return E; }
3633
3634 Expr *operator->() {
3635 return E;
3636 }
3637
3638 private:
3639 // FIXME: No need to make the entire Sema class a friend when it's just
3640 // Sema::MakeFullExpr that needs access to the constructor below.
3641 friend class Sema;
3642
3643 explicit FullExprArg(Expr *expr) : E(expr) {}
3644
3645 Expr *E;
3646 };
3647
3648 FullExprArg MakeFullExpr(Expr *Arg) {
3649 return MakeFullExpr(Arg, Arg ? Arg->getExprLoc() : SourceLocation());
3650 }
3651 FullExprArg MakeFullExpr(Expr *Arg, SourceLocation CC) {
3652 return FullExprArg(ActOnFinishFullExpr(Arg, CC).get());
3653 }
3654 FullExprArg MakeFullDiscardedValueExpr(Expr *Arg) {
3655 ExprResult FE =
3656 ActOnFinishFullExpr(Arg, Arg ? Arg->getExprLoc() : SourceLocation(),
3657 /*DiscardedValue*/ true);
3658 return FullExprArg(FE.get());
3659 }
3660
3661 StmtResult ActOnExprStmt(ExprResult Arg);
3662 StmtResult ActOnExprStmtError();
3663
3664 StmtResult ActOnNullStmt(SourceLocation SemiLoc,
3665 bool HasLeadingEmptyMacro = false);
3666
3667 void ActOnStartOfCompoundStmt();
3668 void ActOnFinishOfCompoundStmt();
3669 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R,
3670 ArrayRef<Stmt *> Elts, bool isStmtExpr);
3671
3672 /// \brief A RAII object to enter scope of a compound statement.
3673 class CompoundScopeRAII {
3674 public:
3675 CompoundScopeRAII(Sema &S): S(S) {
3676 S.ActOnStartOfCompoundStmt();
3677 }
3678
3679 ~CompoundScopeRAII() {
3680 S.ActOnFinishOfCompoundStmt();
3681 }
3682
3683 private:
3684 Sema &S;
3685 };
3686
3687 /// An RAII helper that pops function a function scope on exit.
3688 struct FunctionScopeRAII {
3689 Sema &S;
3690 bool Active;
3691 FunctionScopeRAII(Sema &S) : S(S), Active(true) {}
3692 ~FunctionScopeRAII() {
3693 if (Active)
3694 S.PopFunctionScopeInfo();
3695 }
3696 void disable() { Active = false; }
3697 };
3698
3699 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl,
3700 SourceLocation StartLoc,
3701 SourceLocation EndLoc);
3702 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl);
3703 StmtResult ActOnForEachLValueExpr(Expr *E);
3704 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal,
3705 SourceLocation DotDotDotLoc, Expr *RHSVal,
3706 SourceLocation ColonLoc);
3707 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt);
3708
3709 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc,
3710 SourceLocation ColonLoc,
3711 Stmt *SubStmt, Scope *CurScope);
3712 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl,
3713 SourceLocation ColonLoc, Stmt *SubStmt);
3714
3715 StmtResult ActOnAttributedStmt(SourceLocation AttrLoc,
3716 ArrayRef<const Attr*> Attrs,
3717 Stmt *SubStmt);
3718
3719 class ConditionResult;
3720 StmtResult ActOnIfStmt(SourceLocation IfLoc, bool IsConstexpr,
3721 Stmt *InitStmt,
3722 ConditionResult Cond, Stmt *ThenVal,
3723 SourceLocation ElseLoc, Stmt *ElseVal);
3724 StmtResult BuildIfStmt(SourceLocation IfLoc, bool IsConstexpr,
3725 Stmt *InitStmt,
3726 ConditionResult Cond, Stmt *ThenVal,
3727 SourceLocation ElseLoc, Stmt *ElseVal);
3728 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc,
3729 Stmt *InitStmt,
3730 ConditionResult Cond);
3731 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc,
3732 Stmt *Switch, Stmt *Body);
3733 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, ConditionResult Cond,
3734 Stmt *Body);
3735 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body,
3736 SourceLocation WhileLoc, SourceLocation CondLParen,
3737 Expr *Cond, SourceLocation CondRParen);
3738
3739 StmtResult ActOnForStmt(SourceLocation ForLoc,
3740 SourceLocation LParenLoc,
3741 Stmt *First,
3742 ConditionResult Second,
3743 FullExprArg Third,
3744 SourceLocation RParenLoc,
3745 Stmt *Body);
3746 ExprResult CheckObjCForCollectionOperand(SourceLocation forLoc,
3747 Expr *collection);
3748 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc,
3749 Stmt *First, Expr *collection,
3750 SourceLocation RParenLoc);
3751 StmtResult FinishObjCForCollectionStmt(Stmt *ForCollection, Stmt *Body);
3752
3753 enum BuildForRangeKind {
3754 /// Initial building of a for-range statement.
3755 BFRK_Build,
3756 /// Instantiation or recovery rebuild of a for-range statement. Don't
3757 /// attempt any typo-correction.
3758 BFRK_Rebuild,
3759 /// Determining whether a for-range statement could be built. Avoid any
3760 /// unnecessary or irreversible actions.
3761 BFRK_Check
3762 };
3763
3764 StmtResult ActOnCXXForRangeStmt(Scope *S, SourceLocation ForLoc,
3765 SourceLocation CoawaitLoc,
3766 Stmt *LoopVar,
3767 SourceLocation ColonLoc, Expr *Collection,
3768 SourceLocation RParenLoc,
3769 BuildForRangeKind Kind);
3770 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc,
3771 SourceLocation CoawaitLoc,
3772 SourceLocation ColonLoc,
3773 Stmt *RangeDecl, Stmt *Begin, Stmt *End,
3774 Expr *Cond, Expr *Inc,
3775 Stmt *LoopVarDecl,
3776 SourceLocation RParenLoc,
3777 BuildForRangeKind Kind);
3778 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body);
3779
3780 StmtResult ActOnGotoStmt(SourceLocation GotoLoc,
3781 SourceLocation LabelLoc,
3782 LabelDecl *TheDecl);
3783 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc,
3784 SourceLocation StarLoc,
3785 Expr *DestExp);
3786 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope);
3787 StmtResult ActOnBreakStmt(SourceLocation BreakLoc, Scope *CurScope);
3788
3789 void ActOnCapturedRegionStart(SourceLocation Loc, Scope *CurScope,
3790 CapturedRegionKind Kind, unsigned NumParams);
3791 typedef std::pair<StringRef, QualType> CapturedParamNameType;
3792 void ActOnCapturedRegionStart(SourceLocation Loc, Scope *CurScope,
3793 CapturedRegionKind Kind,
3794 ArrayRef<CapturedParamNameType> Params);
3795 StmtResult ActOnCapturedRegionEnd(Stmt *S);
3796 void ActOnCapturedRegionError();
3797 RecordDecl *CreateCapturedStmtRecordDecl(CapturedDecl *&CD,
3798 SourceLocation Loc,
3799 unsigned NumParams);
3800 VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E,
3801 bool AllowParamOrMoveConstructible);
3802 bool isCopyElisionCandidate(QualType ReturnType, const VarDecl *VD,
3803 bool AllowParamOrMoveConstructible);
3804
3805 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp,
3806 Scope *CurScope);
3807 StmtResult BuildReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp);
3808 StmtResult ActOnCapScopeReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp);
3809
3810 StmtResult ActOnGCCAsmStmt(SourceLocation AsmLoc, bool IsSimple,
3811 bool IsVolatile, unsigned NumOutputs,
3812 unsigned NumInputs, IdentifierInfo **Names,
3813 MultiExprArg Constraints, MultiExprArg Exprs,
3814 Expr *AsmString, MultiExprArg Clobbers,
3815 SourceLocation RParenLoc);
3816
3817 void FillInlineAsmIdentifierInfo(Expr *Res,
3818 llvm::InlineAsmIdentifierInfo &Info);
3819 ExprResult LookupInlineAsmIdentifier(CXXScopeSpec &SS,
3820 SourceLocation TemplateKWLoc,
3821 UnqualifiedId &Id,
3822 bool IsUnevaluatedContext);
3823 bool LookupInlineAsmField(StringRef Base, StringRef Member,
3824 unsigned &Offset, SourceLocation AsmLoc);
3825 ExprResult LookupInlineAsmVarDeclField(Expr *RefExpr, StringRef Member,
3826 SourceLocation AsmLoc);
3827 StmtResult ActOnMSAsmStmt(SourceLocation AsmLoc, SourceLocation LBraceLoc,
3828 ArrayRef<Token> AsmToks,
3829 StringRef AsmString,
3830 unsigned NumOutputs, unsigned NumInputs,
3831 ArrayRef<StringRef> Constraints,
3832 ArrayRef<StringRef> Clobbers,
3833 ArrayRef<Expr*> Exprs,
3834 SourceLocation EndLoc);
3835 LabelDecl *GetOrCreateMSAsmLabel(StringRef ExternalLabelName,
3836 SourceLocation Location,
3837 bool AlwaysCreate);
3838
3839 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType,
3840 SourceLocation StartLoc,
3841 SourceLocation IdLoc, IdentifierInfo *Id,
3842 bool Invalid = false);
3843
3844 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D);
3845
3846 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen,
3847 Decl *Parm, Stmt *Body);
3848
3849 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body);
3850
3851 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try,
3852 MultiStmtArg Catch, Stmt *Finally);
3853
3854 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw);
3855 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw,
3856 Scope *CurScope);
3857 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc,
3858 Expr *operand);
3859 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc,
3860 Expr *SynchExpr,
3861 Stmt *SynchBody);
3862
3863 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body);
3864
3865 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo,
3866 SourceLocation StartLoc,
3867 SourceLocation IdLoc,
3868 IdentifierInfo *Id);
3869
3870 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D);
3871
3872 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc,
3873 Decl *ExDecl, Stmt *HandlerBlock);
3874 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock,
3875 ArrayRef<Stmt *> Handlers);
3876
3877 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ?
3878 SourceLocation TryLoc, Stmt *TryBlock,
3879 Stmt *Handler);
3880 StmtResult ActOnSEHExceptBlock(SourceLocation Loc,
3881 Expr *FilterExpr,
3882 Stmt *Block);
3883 void ActOnStartSEHFinallyBlock();
3884 void ActOnAbortSEHFinallyBlock();
3885 StmtResult ActOnFinishSEHFinallyBlock(SourceLocation Loc, Stmt *Block);
3886 StmtResult ActOnSEHLeaveStmt(SourceLocation Loc, Scope *CurScope);
3887
3888 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock);
3889
3890 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const;
3891
3892 /// \brief If it's a file scoped decl that must warn if not used, keep track
3893 /// of it.
3894 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D);
3895
3896 /// DiagnoseUnusedExprResult - If the statement passed in is an expression
3897 /// whose result is unused, warn.
3898 void DiagnoseUnusedExprResult(const Stmt *S);
3899 void DiagnoseUnusedNestedTypedefs(const RecordDecl *D);
3900 void DiagnoseUnusedDecl(const NamedDecl *ND);
3901
3902 /// Emit \p DiagID if statement located on \p StmtLoc has a suspicious null
3903 /// statement as a \p Body, and it is located on the same line.
3904 ///
3905 /// This helps prevent bugs due to typos, such as:
3906 /// if (condition);
3907 /// do_stuff();
3908 void DiagnoseEmptyStmtBody(SourceLocation StmtLoc,
3909 const Stmt *Body,
3910 unsigned DiagID);
3911
3912 /// Warn if a for/while loop statement \p S, which is followed by
3913 /// \p PossibleBody, has a suspicious null statement as a body.
3914 void DiagnoseEmptyLoopBody(const Stmt *S,
3915 const Stmt *PossibleBody);
3916
3917 /// Warn if a value is moved to itself.
3918 void DiagnoseSelfMove(const Expr *LHSExpr, const Expr *RHSExpr,
3919 SourceLocation OpLoc);
3920
3921 /// \brief Warn if we're implicitly casting from a _Nullable pointer type to a
3922 /// _Nonnull one.
3923 void diagnoseNullableToNonnullConversion(QualType DstType, QualType SrcType,
3924 SourceLocation Loc);
3925
3926 /// Warn when implicitly casting 0 to nullptr.
3927 void diagnoseZeroToNullptrConversion(CastKind Kind, const Expr *E);
3928
3929 ParsingDeclState PushParsingDeclaration(sema::DelayedDiagnosticPool &pool) {
3930 return DelayedDiagnostics.push(pool);
3931 }
3932 void PopParsingDeclaration(ParsingDeclState state, Decl *decl);
3933
3934 typedef ProcessingContextState ParsingClassState;
3935 ParsingClassState PushParsingClass() {
3936 return DelayedDiagnostics.pushUndelayed();
3937 }
3938 void PopParsingClass(ParsingClassState state) {
3939 DelayedDiagnostics.popUndelayed(state);
3940 }
3941
3942 void redelayDiagnostics(sema::DelayedDiagnosticPool &pool);
3943
3944 void DiagnoseAvailabilityOfDecl(NamedDecl *D, SourceLocation Loc,
3945 const ObjCInterfaceDecl *UnknownObjCClass,
3946 bool ObjCPropertyAccess,
3947 bool AvoidPartialAvailabilityChecks = false);
3948
3949 bool makeUnavailableInSystemHeader(SourceLocation loc,
3950 UnavailableAttr::ImplicitReason reason);
3951
3952 /// \brief Issue any -Wunguarded-availability warnings in \c FD
3953 void DiagnoseUnguardedAvailabilityViolations(Decl *FD);
3954
3955 //===--------------------------------------------------------------------===//
3956 // Expression Parsing Callbacks: SemaExpr.cpp.
3957
3958 bool CanUseDecl(NamedDecl *D, bool TreatUnavailableAsInvalid);
3959 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc,
3960 const ObjCInterfaceDecl *UnknownObjCClass = nullptr,
3961 bool ObjCPropertyAccess = false,
3962 bool AvoidPartialAvailabilityChecks = false);
3963 void NoteDeletedFunction(FunctionDecl *FD);
3964 void NoteDeletedInheritingConstructor(CXXConstructorDecl *CD);
3965 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD);
3966 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD,
3967 ObjCMethodDecl *Getter,
3968 SourceLocation Loc);
3969 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc,
3970 ArrayRef<Expr *> Args);
3971
3972 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext,
3973 Decl *LambdaContextDecl = nullptr,
3974 bool IsDecltype = false);
3975 enum ReuseLambdaContextDecl_t { ReuseLambdaContextDecl };
3976 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext,
3977 ReuseLambdaContextDecl_t,
3978 bool IsDecltype = false);
3979 void PopExpressionEvaluationContext();
3980
3981 void DiscardCleanupsInEvaluationContext();
3982
3983 ExprResult TransformToPotentiallyEvaluated(Expr *E);
3984 ExprResult HandleExprEvaluationContextForTypeof(Expr *E);
3985
3986 ExprResult ActOnConstantExpression(ExprResult Res);
3987
3988 // Functions for marking a declaration referenced. These functions also
3989 // contain the relevant logic for marking if a reference to a function or
3990 // variable is an odr-use (in the C++11 sense). There are separate variants
3991 // for expressions referring to a decl; these exist because odr-use marking
3992 // needs to be delayed for some constant variables when we build one of the
3993 // named expressions.
3994 //
3995 // MightBeOdrUse indicates whether the use could possibly be an odr-use, and
3996 // should usually be true. This only needs to be set to false if the lack of
3997 // odr-use cannot be determined from the current context (for instance,
3998 // because the name denotes a virtual function and was written without an
3999 // explicit nested-name-specifier).
4000 void MarkAnyDeclReferenced(SourceLocation Loc, Decl *D, bool MightBeOdrUse);
4001 void MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func,
4002 bool MightBeOdrUse = true);
4003 void MarkVariableReferenced(SourceLocation Loc, VarDecl *Var);
4004 void MarkDeclRefReferenced(DeclRefExpr *E, const Expr *Base = nullptr);
4005 void MarkMemberReferenced(MemberExpr *E);
4006
4007 void UpdateMarkingForLValueToRValue(Expr *E);
4008 void CleanupVarDeclMarking();
4009
4010 enum TryCaptureKind {
4011 TryCapture_Implicit, TryCapture_ExplicitByVal, TryCapture_ExplicitByRef
4012 };
4013
4014 /// \brief Try to capture the given variable.
4015 ///
4016 /// \param Var The variable to capture.
4017 ///
4018 /// \param Loc The location at which the capture occurs.
4019 ///
4020 /// \param Kind The kind of capture, which may be implicit (for either a
4021 /// block or a lambda), or explicit by-value or by-reference (for a lambda).
4022 ///
4023 /// \param EllipsisLoc The location of the ellipsis, if one is provided in
4024 /// an explicit lambda capture.
4025 ///
4026 /// \param BuildAndDiagnose Whether we are actually supposed to add the
4027 /// captures or diagnose errors. If false, this routine merely check whether
4028 /// the capture can occur without performing the capture itself or complaining
4029 /// if the variable cannot be captured.
4030 ///
4031 /// \param CaptureType Will be set to the type of the field used to capture
4032 /// this variable in the innermost block or lambda. Only valid when the
4033 /// variable can be captured.
4034 ///
4035 /// \param DeclRefType Will be set to the type of a reference to the capture
4036 /// from within the current scope. Only valid when the variable can be
4037 /// captured.
4038 ///
4039 /// \param FunctionScopeIndexToStopAt If non-null, it points to the index
4040 /// of the FunctionScopeInfo stack beyond which we do not attempt to capture.
4041 /// This is useful when enclosing lambdas must speculatively capture
4042 /// variables that may or may not be used in certain specializations of
4043 /// a nested generic lambda.
4044 ///
4045 /// \returns true if an error occurred (i.e., the variable cannot be
4046 /// captured) and false if the capture succeeded.
4047 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, TryCaptureKind Kind,
4048 SourceLocation EllipsisLoc, bool BuildAndDiagnose,
4049 QualType &CaptureType,
4050 QualType &DeclRefType,
4051 const unsigned *const FunctionScopeIndexToStopAt);
4052
4053 /// \brief Try to capture the given variable.
4054 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc,
4055 TryCaptureKind Kind = TryCapture_Implicit,
4056 SourceLocation EllipsisLoc = SourceLocation());
4057
4058 /// \brief Checks if the variable must be captured.
4059 bool NeedToCaptureVariable(VarDecl *Var, SourceLocation Loc);
4060
4061 /// \brief Given a variable, determine the type that a reference to that
4062 /// variable will have in the given scope.
4063 QualType getCapturedDeclRefType(VarDecl *Var, SourceLocation Loc);
4064
4065 /// Mark all of the declarations referenced within a particular AST node as
4066 /// referenced. Used when template instantiation instantiates a non-dependent
4067 /// type -- entities referenced by the type are now referenced.
4068 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T);
4069 void MarkDeclarationsReferencedInExpr(Expr *E,
4070 bool SkipLocalVariables = false);
4071
4072 /// \brief Try to recover by turning the given expression into a
4073 /// call. Returns true if recovery was attempted or an error was
4074 /// emitted; this may also leave the ExprResult invalid.
4075 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD,
4076 bool ForceComplain = false,
4077 bool (*IsPlausibleResult)(QualType) = nullptr);
4078
4079 /// \brief Figure out if an expression could be turned into a call.
4080 bool tryExprAsCall(Expr &E, QualType &ZeroArgCallReturnTy,
4081 UnresolvedSetImpl &NonTemplateOverloads);
4082
4083 /// \brief Conditionally issue a diagnostic based on the current
4084 /// evaluation context.
4085 ///
4086 /// \param Statement If Statement is non-null, delay reporting the
4087 /// diagnostic until the function body is parsed, and then do a basic
4088 /// reachability analysis to determine if the statement is reachable.
4089 /// If it is unreachable, the diagnostic will not be emitted.
4090 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement,
4091 const PartialDiagnostic &PD);
4092
4093 // Primary Expressions.
4094 SourceRange getExprRange(Expr *E) const;
4095
4096 ExprResult ActOnIdExpression(
4097 Scope *S, CXXScopeSpec &SS, SourceLocation TemplateKWLoc,
4098 UnqualifiedId &Id, bool HasTrailingLParen, bool IsAddressOfOperand,
4099 std::unique_ptr<CorrectionCandidateCallback> CCC = nullptr,
4100 bool IsInlineAsmIdentifier = false, Token *KeywordReplacement = nullptr);
4101
4102 void DecomposeUnqualifiedId(const UnqualifiedId &Id,
4103 TemplateArgumentListInfo &Buffer,
4104 DeclarationNameInfo &NameInfo,
4105 const TemplateArgumentListInfo *&TemplateArgs);
4106
4107 bool
4108 DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R,
4109 std::unique_ptr<CorrectionCandidateCallback> CCC,
4110 TemplateArgumentListInfo *ExplicitTemplateArgs = nullptr,
4111 ArrayRef<Expr *> Args = None, TypoExpr **Out = nullptr);
4112
4113 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S,
4114 IdentifierInfo *II,
4115 bool AllowBuiltinCreation=false);
4116
4117 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS,
4118 SourceLocation TemplateKWLoc,
4119 const DeclarationNameInfo &NameInfo,
4120 bool isAddressOfOperand,
4121 const TemplateArgumentListInfo *TemplateArgs);
4122
4123 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty,
4124 ExprValueKind VK,
4125 SourceLocation Loc,
4126 const CXXScopeSpec *SS = nullptr);
4127 ExprResult
4128 BuildDeclRefExpr(ValueDecl *D, QualType Ty, ExprValueKind VK,
4129 const DeclarationNameInfo &NameInfo,
4130 const CXXScopeSpec *SS = nullptr,
4131 NamedDecl *FoundD = nullptr,
4132 const TemplateArgumentListInfo *TemplateArgs = nullptr);
4133 ExprResult
4134 BuildAnonymousStructUnionMemberReference(
4135 const CXXScopeSpec &SS,
4136 SourceLocation nameLoc,
4137 IndirectFieldDecl *indirectField,
4138 DeclAccessPair FoundDecl = DeclAccessPair::make(nullptr, AS_none),
4139 Expr *baseObjectExpr = nullptr,
4140 SourceLocation opLoc = SourceLocation());
4141
4142 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS,
4143 SourceLocation TemplateKWLoc,
4144 LookupResult &R,
4145 const TemplateArgumentListInfo *TemplateArgs,
4146 const Scope *S);
4147 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS,
4148 SourceLocation TemplateKWLoc,
4149 LookupResult &R,
4150 const TemplateArgumentListInfo *TemplateArgs,
4151 bool IsDefiniteInstance,
4152 const Scope *S);
4153 bool UseArgumentDependentLookup(const CXXScopeSpec &SS,
4154 const LookupResult &R,
4155 bool HasTrailingLParen);
4156
4157 ExprResult
4158 BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS,
4159 const DeclarationNameInfo &NameInfo,
4160 bool IsAddressOfOperand, const Scope *S,
4161 TypeSourceInfo **RecoveryTSI = nullptr);
4162
4163 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS,
4164 SourceLocation TemplateKWLoc,
4165 const DeclarationNameInfo &NameInfo,
4166 const TemplateArgumentListInfo *TemplateArgs);
4167
4168 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS,
4169 LookupResult &R,
4170 bool NeedsADL,
4171 bool AcceptInvalidDecl = false);
4172 ExprResult BuildDeclarationNameExpr(
4173 const CXXScopeSpec &SS, const DeclarationNameInfo &NameInfo, NamedDecl *D,
4174 NamedDecl *FoundD = nullptr,
4175 const TemplateArgumentListInfo *TemplateArgs = nullptr,
4176 bool AcceptInvalidDecl = false);
4177
4178 ExprResult BuildLiteralOperatorCall(LookupResult &R,
4179 DeclarationNameInfo &SuffixInfo,
4180 ArrayRef<Expr *> Args,
4181 SourceLocation LitEndLoc,
4182 TemplateArgumentListInfo *ExplicitTemplateArgs = nullptr);
4183
4184 ExprResult BuildPredefinedExpr(SourceLocation Loc,
4185 PredefinedExpr::IdentType IT);
4186 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind);
4187 ExprResult ActOnIntegerConstant(SourceLocation Loc, uint64_t Val);
4188
4189 bool CheckLoopHintExpr(Expr *E, SourceLocation Loc);
4190
4191 ExprResult ActOnNumericConstant(const Token &Tok, Scope *UDLScope = nullptr);
4192 ExprResult ActOnCharacterConstant(const Token &Tok,
4193 Scope *UDLScope = nullptr);
4194 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E);
4195 ExprResult ActOnParenListExpr(SourceLocation L,
4196 SourceLocation R,
4197 MultiExprArg Val);
4198
4199 /// ActOnStringLiteral - The specified tokens were lexed as pasted string
4200 /// fragments (e.g. "foo" "bar" L"baz").
4201 ExprResult ActOnStringLiteral(ArrayRef<Token> StringToks,
4202 Scope *UDLScope = nullptr);
4203
4204 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc,
4205 SourceLocation DefaultLoc,
4206 SourceLocation RParenLoc,
4207 Expr *ControllingExpr,
4208 ArrayRef<ParsedType> ArgTypes,
4209 ArrayRef<Expr *> ArgExprs);
4210 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc,
4211 SourceLocation DefaultLoc,
4212 SourceLocation RParenLoc,
4213 Expr *ControllingExpr,
4214 ArrayRef<TypeSourceInfo *> Types,
4215 ArrayRef<Expr *> Exprs);
4216
4217 // Binary/Unary Operators. 'Tok' is the token for the operator.
4218 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc,
4219 Expr *InputExpr);
4220 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc,
4221 UnaryOperatorKind Opc, Expr *Input);
4222 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc,
4223 tok::TokenKind Op, Expr *Input);
4224
4225 QualType CheckAddressOfOperand(ExprResult &Operand, SourceLocation OpLoc);
4226
4227 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo,
4228 SourceLocation OpLoc,
4229 UnaryExprOrTypeTrait ExprKind,
4230 SourceRange R);
4231 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc,
4232 UnaryExprOrTypeTrait ExprKind);
4233 ExprResult
4234 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc,
4235 UnaryExprOrTypeTrait ExprKind,
4236 bool IsType, void *TyOrEx,
4237 SourceRange ArgRange);
4238
4239 ExprResult CheckPlaceholderExpr(Expr *E);
4240 bool CheckVecStepExpr(Expr *E);
4241
4242 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind);
4243 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc,
4244 SourceRange ExprRange,
4245 UnaryExprOrTypeTrait ExprKind);
4246 ExprResult ActOnSizeofParameterPackExpr(Scope *S,
4247 SourceLocation OpLoc,
4248 IdentifierInfo &Name,
4249 SourceLocation NameLoc,
4250 SourceLocation RParenLoc);
4251 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc,
4252 tok::TokenKind Kind, Expr *Input);
4253
4254 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc,
4255 Expr *Idx, SourceLocation RLoc);
4256 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc,
4257 Expr *Idx, SourceLocation RLoc);
4258 ExprResult ActOnOMPArraySectionExpr(Expr *Base, SourceLocation LBLoc,
4259 Expr *LowerBound, SourceLocation ColonLoc,
4260 Expr *Length, SourceLocation RBLoc);
4261
4262 // This struct is for use by ActOnMemberAccess to allow
4263 // BuildMemberReferenceExpr to be able to reinvoke ActOnMemberAccess after
4264 // changing the access operator from a '.' to a '->' (to see if that is the
4265 // change needed to fix an error about an unknown member, e.g. when the class
4266 // defines a custom operator->).
4267 struct ActOnMemberAccessExtraArgs {
4268 Scope *S;
4269 UnqualifiedId &Id;
4270 Decl *ObjCImpDecl;
4271 };
4272
4273 ExprResult BuildMemberReferenceExpr(
4274 Expr *Base, QualType BaseType, SourceLocation OpLoc, bool IsArrow,
4275 CXXScopeSpec &SS, SourceLocation TemplateKWLoc,
4276 NamedDecl *FirstQualifierInScope, const DeclarationNameInfo &NameInfo,
4277 const TemplateArgumentListInfo *TemplateArgs,
4278 const Scope *S,
4279 ActOnMemberAccessExtraArgs *ExtraArgs = nullptr);
4280
4281 ExprResult
4282 BuildMemberReferenceExpr(Expr *Base, QualType BaseType, SourceLocation OpLoc,
4283 bool IsArrow, const CXXScopeSpec &SS,
4284 SourceLocation TemplateKWLoc,
4285 NamedDecl *FirstQualifierInScope, LookupResult &R,
4286 const TemplateArgumentListInfo *TemplateArgs,
4287 const Scope *S,
4288 bool SuppressQualifierCheck = false,
4289 ActOnMemberAccessExtraArgs *ExtraArgs = nullptr);
4290
4291 ExprResult BuildFieldReferenceExpr(Expr *BaseExpr, bool IsArrow,
4292 SourceLocation OpLoc,
4293 const CXXScopeSpec &SS, FieldDecl *Field,
4294 DeclAccessPair FoundDecl,
4295 const DeclarationNameInfo &MemberNameInfo);
4296
4297 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow);
4298
4299 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType,
4300 const CXXScopeSpec &SS,
4301 const LookupResult &R);
4302
4303 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType,
4304 bool IsArrow, SourceLocation OpLoc,
4305 const CXXScopeSpec &SS,
4306 SourceLocation TemplateKWLoc,
4307 NamedDecl *FirstQualifierInScope,
4308 const DeclarationNameInfo &NameInfo,
4309 const TemplateArgumentListInfo *TemplateArgs);
4310
4311 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base,
4312 SourceLocation OpLoc,
4313 tok::TokenKind OpKind,
4314 CXXScopeSpec &SS,
4315 SourceLocation TemplateKWLoc,
4316 UnqualifiedId &Member,
4317 Decl *ObjCImpDecl);
4318
4319 void ActOnDefaultCtorInitializers(Decl *CDtorDecl);
4320 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn,
4321 FunctionDecl *FDecl,
4322 const FunctionProtoType *Proto,
4323 ArrayRef<Expr *> Args,
4324 SourceLocation RParenLoc,
4325 bool ExecConfig = false);
4326 void CheckStaticArrayArgument(SourceLocation CallLoc,
4327 ParmVarDecl *Param,
4328 const Expr *ArgExpr);
4329
4330 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments.
4331 /// This provides the location of the left/right parens and a list of comma
4332 /// locations.
4333 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc,
4334 MultiExprArg ArgExprs, SourceLocation RParenLoc,
4335 Expr *ExecConfig = nullptr,
4336 bool IsExecConfig = false);
4337 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl,
4338 SourceLocation LParenLoc,
4339 ArrayRef<Expr *> Arg,
4340 SourceLocation RParenLoc,
4341 Expr *Config = nullptr,
4342 bool IsExecConfig = false);
4343
4344 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc,
4345 MultiExprArg ExecConfig,
4346 SourceLocation GGGLoc);
4347
4348 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc,
4349 Declarator &D, ParsedType &Ty,
4350 SourceLocation RParenLoc, Expr *CastExpr);
4351 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc,
4352 TypeSourceInfo *Ty,
4353 SourceLocation RParenLoc,
4354 Expr *Op);
4355 CastKind PrepareScalarCast(ExprResult &src, QualType destType);
4356
4357 /// \brief Build an altivec or OpenCL literal.
4358 ExprResult BuildVectorLiteral(SourceLocation LParenLoc,
4359 SourceLocation RParenLoc, Expr *E,
4360 TypeSourceInfo *TInfo);
4361
4362 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME);
4363
4364 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc,
4365 ParsedType Ty,
4366 SourceLocation RParenLoc,
4367 Expr *InitExpr);
4368
4369 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc,
4370 TypeSourceInfo *TInfo,
4371 SourceLocation RParenLoc,
4372 Expr *LiteralExpr);
4373
4374 ExprResult ActOnInitList(SourceLocation LBraceLoc,
4375 MultiExprArg InitArgList,
4376 SourceLocation RBraceLoc);
4377
4378 ExprResult ActOnDesignatedInitializer(Designation &Desig,
4379 SourceLocation Loc,
4380 bool GNUSyntax,
4381 ExprResult Init);
4382
4383private:
4384 static BinaryOperatorKind ConvertTokenKindToBinaryOpcode(tok::TokenKind Kind);
4385
4386public:
4387 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc,
4388 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr);
4389 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc,
4390 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr);
4391 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc,
4392 Expr *LHSExpr, Expr *RHSExpr);
4393
4394 void DiagnoseCommaOperator(const Expr *LHS, SourceLocation Loc);
4395
4396 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null
4397 /// in the case of a the GNU conditional expr extension.
4398 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc,
4399 SourceLocation ColonLoc,
4400 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr);
4401
4402 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo".
4403 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc,
4404 LabelDecl *TheDecl);
4405
4406 void ActOnStartStmtExpr();
4407 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt,
4408 SourceLocation RPLoc); // "({..})"
4409 void ActOnStmtExprError();
4410
4411 // __builtin_offsetof(type, identifier(.identifier|[expr])*)
4412 struct OffsetOfComponent {
4413 SourceLocation LocStart, LocEnd;
4414 bool isBrackets; // true if [expr], false if .ident
4415 union {
4416 IdentifierInfo *IdentInfo;
4417 Expr *E;
4418 } U;
4419 };
4420
4421 /// __builtin_offsetof(type, a.b[123][456].c)
4422 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc,
4423 TypeSourceInfo *TInfo,
4424 ArrayRef<OffsetOfComponent> Components,
4425 SourceLocation RParenLoc);
4426 ExprResult ActOnBuiltinOffsetOf(Scope *S,
4427 SourceLocation BuiltinLoc,
4428 SourceLocation TypeLoc,
4429 ParsedType ParsedArgTy,
4430 ArrayRef<OffsetOfComponent> Components,
4431 SourceLocation RParenLoc);
4432
4433 // __builtin_choose_expr(constExpr, expr1, expr2)
4434 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc,
4435 Expr *CondExpr, Expr *LHSExpr,
4436 Expr *RHSExpr, SourceLocation RPLoc);
4437
4438 // __builtin_va_arg(expr, type)
4439 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty,
4440 SourceLocation RPLoc);
4441 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E,
4442 TypeSourceInfo *TInfo, SourceLocation RPLoc);
4443
4444 // __null
4445 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc);
4446
4447 bool CheckCaseExpression(Expr *E);
4448
4449 /// \brief Describes the result of an "if-exists" condition check.
4450 enum IfExistsResult {
4451 /// \brief The symbol exists.
4452 IER_Exists,
4453
4454 /// \brief The symbol does not exist.
4455 IER_DoesNotExist,
4456
4457 /// \brief The name is a dependent name, so the results will differ
4458 /// from one instantiation to the next.
4459 IER_Dependent,
4460
4461 /// \brief An error occurred.
4462 IER_Error
4463 };
4464
4465 IfExistsResult
4466 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS,
4467 const DeclarationNameInfo &TargetNameInfo);
4468
4469 IfExistsResult
4470 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc,
4471 bool IsIfExists, CXXScopeSpec &SS,
4472 UnqualifiedId &Name);
4473
4474 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc,
4475 bool IsIfExists,
4476 NestedNameSpecifierLoc QualifierLoc,
4477 DeclarationNameInfo NameInfo,
4478 Stmt *Nested);
4479 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc,
4480 bool IsIfExists,
4481 CXXScopeSpec &SS, UnqualifiedId &Name,
4482 Stmt *Nested);
4483
4484 //===------------------------- "Block" Extension ------------------------===//
4485
4486 /// ActOnBlockStart - This callback is invoked when a block literal is
4487 /// started.
4488 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope);
4489
4490 /// ActOnBlockArguments - This callback allows processing of block arguments.
4491 /// If there are no arguments, this is still invoked.
4492 void ActOnBlockArguments(SourceLocation CaretLoc, Declarator &ParamInfo,
4493 Scope *CurScope);
4494
4495 /// ActOnBlockError - If there is an error parsing a block, this callback
4496 /// is invoked to pop the information about the block from the action impl.
4497 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope);
4498
4499 /// ActOnBlockStmtExpr - This is called when the body of a block statement
4500 /// literal was successfully completed. ^(int x){...}
4501 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body,
4502 Scope *CurScope);
4503
4504 //===---------------------------- Clang Extensions ----------------------===//
4505
4506 /// __builtin_convertvector(...)
4507 ExprResult ActOnConvertVectorExpr(Expr *E, ParsedType ParsedDestTy,
4508 SourceLocation BuiltinLoc,
4509 SourceLocation RParenLoc);
4510
4511 //===---------------------------- OpenCL Features -----------------------===//
4512
4513 /// __builtin_astype(...)
4514 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy,
4515 SourceLocation BuiltinLoc,
4516 SourceLocation RParenLoc);
4517
4518 //===---------------------------- C++ Features --------------------------===//
4519
4520 // Act on C++ namespaces
4521 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc,
4522 SourceLocation NamespaceLoc,
4523 SourceLocation IdentLoc,
4524 IdentifierInfo *Ident,
4525 SourceLocation LBrace,
4526 AttributeList *AttrList,
4527 UsingDirectiveDecl * &UsingDecl);
4528 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace);
4529
4530 NamespaceDecl *getStdNamespace() const;
4531 NamespaceDecl *getOrCreateStdNamespace();
4532
4533 NamespaceDecl *lookupStdExperimentalNamespace();
4534
4535 CXXRecordDecl *getStdBadAlloc() const;
4536 EnumDecl *getStdAlignValT() const;
4537
4538 /// \brief Tests whether Ty is an instance of std::initializer_list and, if
4539 /// it is and Element is not NULL, assigns the element type to Element.
4540 bool isStdInitializerList(QualType Ty, QualType *Element);
4541
4542 /// \brief Looks for the std::initializer_list template and instantiates it
4543 /// with Element, or emits an error if it's not found.
4544 ///
4545 /// \returns The instantiated template, or null on error.
4546 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc);
4547
4548 /// \brief Determine whether Ctor is an initializer-list constructor, as
4549 /// defined in [dcl.init.list]p2.
4550 bool isInitListConstructor(const FunctionDecl *Ctor);
4551
4552 Decl *ActOnUsingDirective(Scope *CurScope,
4553 SourceLocation UsingLoc,
4554 SourceLocation NamespcLoc,
4555 CXXScopeSpec &SS,
4556 SourceLocation IdentLoc,
4557 IdentifierInfo *NamespcName,
4558 AttributeList *AttrList);
4559
4560 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir);
4561
4562 Decl *ActOnNamespaceAliasDef(Scope *CurScope,
4563 SourceLocation NamespaceLoc,
4564 SourceLocation AliasLoc,
4565 IdentifierInfo *Alias,
4566 CXXScopeSpec &SS,
4567 SourceLocation IdentLoc,
4568 IdentifierInfo *Ident);
4569
4570 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow);
4571 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target,
4572 const LookupResult &PreviousDecls,
4573 UsingShadowDecl *&PrevShadow);
4574 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD,
4575 NamedDecl *Target,
4576 UsingShadowDecl *PrevDecl);
4577
4578 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc,
4579 bool HasTypenameKeyword,
4580 const CXXScopeSpec &SS,
4581 SourceLocation NameLoc,
4582 const LookupResult &Previous);
4583 bool CheckUsingDeclQualifier(SourceLocation UsingLoc,
4584 bool HasTypename,
4585 const CXXScopeSpec &SS,
4586 const DeclarationNameInfo &NameInfo,
4587 SourceLocation NameLoc);
4588
4589 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS,
4590 SourceLocation UsingLoc,
4591 bool HasTypenameKeyword,
4592 SourceLocation TypenameLoc,
4593 CXXScopeSpec &SS,
4594 DeclarationNameInfo NameInfo,
4595 SourceLocation EllipsisLoc,
4596 AttributeList *AttrList,
4597 bool IsInstantiation);
4598 NamedDecl *BuildUsingPackDecl(NamedDecl *InstantiatedFrom,
4599 ArrayRef<NamedDecl *> Expansions);
4600
4601 bool CheckInheritingConstructorUsingDecl(UsingDecl *UD);
4602
4603 /// Given a derived-class using shadow declaration for a constructor and the
4604 /// correspnding base class constructor, find or create the implicit
4605 /// synthesized derived class constructor to use for this initialization.
4606 CXXConstructorDecl *
4607 findInheritingConstructor(SourceLocation Loc, CXXConstructorDecl *BaseCtor,
4608 ConstructorUsingShadowDecl *DerivedShadow);
4609
4610 Decl *ActOnUsingDeclaration(Scope *CurScope,
4611 AccessSpecifier AS,
4612 SourceLocation UsingLoc,
4613 SourceLocation TypenameLoc,
4614 CXXScopeSpec &SS,
4615 UnqualifiedId &Name,
4616 SourceLocation EllipsisLoc,
4617 AttributeList *AttrList);
4618 Decl *ActOnAliasDeclaration(Scope *CurScope,
4619 AccessSpecifier AS,
4620 MultiTemplateParamsArg TemplateParams,
4621 SourceLocation UsingLoc,
4622 UnqualifiedId &Name,
4623 AttributeList *AttrList,
4624 TypeResult Type,
4625 Decl *DeclFromDeclSpec);
4626
4627 /// BuildCXXConstructExpr - Creates a complete call to a constructor,
4628 /// including handling of its default argument expressions.
4629 ///
4630 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind
4631 ExprResult
4632 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
4633 NamedDecl *FoundDecl,
4634 CXXConstructorDecl *Constructor, MultiExprArg Exprs,
4635 bool HadMultipleCandidates, bool IsListInitialization,
4636 bool IsStdInitListInitialization,
4637 bool RequiresZeroInit, unsigned ConstructKind,
4638 SourceRange ParenRange);
4639
4640 /// Build a CXXConstructExpr whose constructor has already been resolved if
4641 /// it denotes an inherited constructor.
4642 ExprResult
4643 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
4644 CXXConstructorDecl *Constructor, bool Elidable,
4645 MultiExprArg Exprs,
4646 bool HadMultipleCandidates, bool IsListInitialization,
4647 bool IsStdInitListInitialization,
4648 bool RequiresZeroInit, unsigned ConstructKind,
4649 SourceRange ParenRange);
4650
4651 // FIXME: Can we remove this and have the above BuildCXXConstructExpr check if
4652 // the constructor can be elidable?
4653 ExprResult
4654 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
4655 NamedDecl *FoundDecl,
4656 CXXConstructorDecl *Constructor, bool Elidable,
4657 MultiExprArg Exprs, bool HadMultipleCandidates,
4658 bool IsListInitialization,
4659 bool IsStdInitListInitialization, bool RequiresZeroInit,
4660 unsigned ConstructKind, SourceRange ParenRange);
4661
4662 ExprResult BuildCXXDefaultInitExpr(SourceLocation Loc, FieldDecl *Field);
4663
4664
4665 /// Instantiate or parse a C++ default argument expression as necessary.
4666 /// Return true on error.
4667 bool CheckCXXDefaultArgExpr(SourceLocation CallLoc, FunctionDecl *FD,
4668 ParmVarDecl *Param);
4669
4670 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating
4671 /// the default expr if needed.
4672 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc,
4673 FunctionDecl *FD,
4674 ParmVarDecl *Param);
4675
4676 /// FinalizeVarWithDestructor - Prepare for calling destructor on the
4677 /// constructed variable.
4678 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType);
4679
4680 /// \brief Helper class that collects exception specifications for
4681 /// implicitly-declared special member functions.
4682 class ImplicitExceptionSpecification {
4683 // Pointer to allow copying
4684 Sema *Self;
4685 // We order exception specifications thus:
4686 // noexcept is the most restrictive, but is only used in C++11.
4687 // throw() comes next.
4688 // Then a throw(collected exceptions)
4689 // Finally no specification, which is expressed as noexcept(false).
4690 // throw(...) is used instead if any called function uses it.
4691 ExceptionSpecificationType ComputedEST;
4692 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen;
4693 SmallVector<QualType, 4> Exceptions;
4694
4695 void ClearExceptions() {
4696 ExceptionsSeen.clear();
4697 Exceptions.clear();
4698 }
4699
4700 public:
4701 explicit ImplicitExceptionSpecification(Sema &Self)
4702 : Self(&Self), ComputedEST(EST_BasicNoexcept) {
4703 if (!Self.getLangOpts().CPlusPlus11)
4704 ComputedEST = EST_DynamicNone;
4705 }
4706
4707 /// \brief Get the computed exception specification type.
4708 ExceptionSpecificationType getExceptionSpecType() const {
4709 assert(ComputedEST != EST_ComputedNoexcept &&(static_cast <bool> (ComputedEST != EST_ComputedNoexcept
&& "noexcept(expr) should not be a possible result")
? void (0) : __assert_fail ("ComputedEST != EST_ComputedNoexcept && \"noexcept(expr) should not be a possible result\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 4710, __extension__ __PRETTY_FUNCTION__))
4710 "noexcept(expr) should not be a possible result")(static_cast <bool> (ComputedEST != EST_ComputedNoexcept
&& "noexcept(expr) should not be a possible result")
? void (0) : __assert_fail ("ComputedEST != EST_ComputedNoexcept && \"noexcept(expr) should not be a possible result\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 4710, __extension__ __PRETTY_FUNCTION__));
4711 return ComputedEST;
4712 }
4713
4714 /// \brief The number of exceptions in the exception specification.
4715 unsigned size() const { return Exceptions.size(); }
4716
4717 /// \brief The set of exceptions in the exception specification.
4718 const QualType *data() const { return Exceptions.data(); }
4719
4720 /// \brief Integrate another called method into the collected data.
4721 void CalledDecl(SourceLocation CallLoc, const CXXMethodDecl *Method);
4722
4723 /// \brief Integrate an invoked expression into the collected data.
4724 void CalledExpr(Expr *E);
4725
4726 /// \brief Overwrite an EPI's exception specification with this
4727 /// computed exception specification.
4728 FunctionProtoType::ExceptionSpecInfo getExceptionSpec() const {
4729 FunctionProtoType::ExceptionSpecInfo ESI;
4730 ESI.Type = getExceptionSpecType();
4731 if (ESI.Type == EST_Dynamic) {
4732 ESI.Exceptions = Exceptions;
4733 } else if (ESI.Type == EST_None) {
4734 /// C++11 [except.spec]p14:
4735 /// The exception-specification is noexcept(false) if the set of
4736 /// potential exceptions of the special member function contains "any"
4737 ESI.Type = EST_ComputedNoexcept;
4738 ESI.NoexceptExpr = Self->ActOnCXXBoolLiteral(SourceLocation(),
4739 tok::kw_false).get();
4740 }
4741 return ESI;
4742 }
4743 };
4744
4745 /// \brief Determine what sort of exception specification a defaulted
4746 /// copy constructor of a class will have.
4747 ImplicitExceptionSpecification
4748 ComputeDefaultedDefaultCtorExceptionSpec(SourceLocation Loc,
4749 CXXMethodDecl *MD);
4750
4751 /// \brief Determine what sort of exception specification a defaulted
4752 /// default constructor of a class will have, and whether the parameter
4753 /// will be const.
4754 ImplicitExceptionSpecification
4755 ComputeDefaultedCopyCtorExceptionSpec(CXXMethodDecl *MD);
4756
4757 /// \brief Determine what sort of exception specification a defautled
4758 /// copy assignment operator of a class will have, and whether the
4759 /// parameter will be const.
4760 ImplicitExceptionSpecification
4761 ComputeDefaultedCopyAssignmentExceptionSpec(CXXMethodDecl *MD);
4762
4763 /// \brief Determine what sort of exception specification a defaulted move
4764 /// constructor of a class will have.
4765 ImplicitExceptionSpecification
4766 ComputeDefaultedMoveCtorExceptionSpec(CXXMethodDecl *MD);
4767
4768 /// \brief Determine what sort of exception specification a defaulted move
4769 /// assignment operator of a class will have.
4770 ImplicitExceptionSpecification
4771 ComputeDefaultedMoveAssignmentExceptionSpec(CXXMethodDecl *MD);
4772
4773 /// \brief Determine what sort of exception specification a defaulted
4774 /// destructor of a class will have.
4775 ImplicitExceptionSpecification
4776 ComputeDefaultedDtorExceptionSpec(CXXMethodDecl *MD);
4777
4778 /// \brief Determine what sort of exception specification an inheriting
4779 /// constructor of a class will have.
4780 ImplicitExceptionSpecification
4781 ComputeInheritingCtorExceptionSpec(SourceLocation Loc,
4782 CXXConstructorDecl *CD);
4783
4784 /// \brief Evaluate the implicit exception specification for a defaulted
4785 /// special member function.
4786 void EvaluateImplicitExceptionSpec(SourceLocation Loc, CXXMethodDecl *MD);
4787
4788 /// \brief Check the given exception-specification and update the
4789 /// exception specification information with the results.
4790 void checkExceptionSpecification(bool IsTopLevel,
4791 ExceptionSpecificationType EST,
4792 ArrayRef<ParsedType> DynamicExceptions,
4793 ArrayRef<SourceRange> DynamicExceptionRanges,
4794 Expr *NoexceptExpr,
4795 SmallVectorImpl<QualType> &Exceptions,
4796 FunctionProtoType::ExceptionSpecInfo &ESI);
4797
4798 /// \brief Determine if we're in a case where we need to (incorrectly) eagerly
4799 /// parse an exception specification to work around a libstdc++ bug.
4800 bool isLibstdcxxEagerExceptionSpecHack(const Declarator &D);
4801
4802 /// \brief Add an exception-specification to the given member function
4803 /// (or member function template). The exception-specification was parsed
4804 /// after the method itself was declared.
4805 void actOnDelayedExceptionSpecification(Decl *Method,
4806 ExceptionSpecificationType EST,
4807 SourceRange SpecificationRange,
4808 ArrayRef<ParsedType> DynamicExceptions,
4809 ArrayRef<SourceRange> DynamicExceptionRanges,
4810 Expr *NoexceptExpr);
4811
4812 class InheritedConstructorInfo;
4813
4814 /// \brief Determine if a special member function should have a deleted
4815 /// definition when it is defaulted.
4816 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM,
4817 InheritedConstructorInfo *ICI = nullptr,
4818 bool Diagnose = false);
4819
4820 /// \brief Declare the implicit default constructor for the given class.
4821 ///
4822 /// \param ClassDecl The class declaration into which the implicit
4823 /// default constructor will be added.
4824 ///
4825 /// \returns The implicitly-declared default constructor.
4826 CXXConstructorDecl *DeclareImplicitDefaultConstructor(
4827 CXXRecordDecl *ClassDecl);
4828
4829 /// DefineImplicitDefaultConstructor - Checks for feasibility of
4830 /// defining this constructor as the default constructor.
4831 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation,
4832 CXXConstructorDecl *Constructor);
4833
4834 /// \brief Declare the implicit destructor for the given class.
4835 ///
4836 /// \param ClassDecl The class declaration into which the implicit
4837 /// destructor will be added.
4838 ///
4839 /// \returns The implicitly-declared destructor.
4840 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl);
4841
4842 /// DefineImplicitDestructor - Checks for feasibility of
4843 /// defining this destructor as the default destructor.
4844 void DefineImplicitDestructor(SourceLocation CurrentLocation,
4845 CXXDestructorDecl *Destructor);
4846
4847 /// \brief Build an exception spec for destructors that don't have one.
4848 ///
4849 /// C++11 says that user-defined destructors with no exception spec get one
4850 /// that looks as if the destructor was implicitly declared.
4851 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl,
4852 CXXDestructorDecl *Destructor);
4853
4854 /// \brief Define the specified inheriting constructor.
4855 void DefineInheritingConstructor(SourceLocation UseLoc,
4856 CXXConstructorDecl *Constructor);
4857
4858 /// \brief Declare the implicit copy constructor for the given class.
4859 ///
4860 /// \param ClassDecl The class declaration into which the implicit
4861 /// copy constructor will be added.
4862 ///
4863 /// \returns The implicitly-declared copy constructor.
4864 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl);
4865
4866 /// DefineImplicitCopyConstructor - Checks for feasibility of
4867 /// defining this constructor as the copy constructor.
4868 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation,
4869 CXXConstructorDecl *Constructor);
4870
4871 /// \brief Declare the implicit move constructor for the given class.
4872 ///
4873 /// \param ClassDecl The Class declaration into which the implicit
4874 /// move constructor will be added.
4875 ///
4876 /// \returns The implicitly-declared move constructor, or NULL if it wasn't
4877 /// declared.
4878 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl);
4879
4880 /// DefineImplicitMoveConstructor - Checks for feasibility of
4881 /// defining this constructor as the move constructor.
4882 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation,
4883 CXXConstructorDecl *Constructor);
4884
4885 /// \brief Declare the implicit copy assignment operator for the given class.
4886 ///
4887 /// \param ClassDecl The class declaration into which the implicit
4888 /// copy assignment operator will be added.
4889 ///
4890 /// \returns The implicitly-declared copy assignment operator.
4891 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl);
4892
4893 /// \brief Defines an implicitly-declared copy assignment operator.
4894 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation,
4895 CXXMethodDecl *MethodDecl);
4896
4897 /// \brief Declare the implicit move assignment operator for the given class.
4898 ///
4899 /// \param ClassDecl The Class declaration into which the implicit
4900 /// move assignment operator will be added.
4901 ///
4902 /// \returns The implicitly-declared move assignment operator, or NULL if it
4903 /// wasn't declared.
4904 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl);
4905
4906 /// \brief Defines an implicitly-declared move assignment operator.
4907 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation,
4908 CXXMethodDecl *MethodDecl);
4909
4910 /// \brief Force the declaration of any implicitly-declared members of this
4911 /// class.
4912 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class);
4913
4914 /// \brief Check a completed declaration of an implicit special member.
4915 void CheckImplicitSpecialMemberDeclaration(Scope *S, FunctionDecl *FD);
4916
4917 /// \brief Determine whether the given function is an implicitly-deleted
4918 /// special member function.
4919 bool isImplicitlyDeleted(FunctionDecl *FD);
4920
4921 /// \brief Check whether 'this' shows up in the type of a static member
4922 /// function after the (naturally empty) cv-qualifier-seq would be.
4923 ///
4924 /// \returns true if an error occurred.
4925 bool checkThisInStaticMemberFunctionType(CXXMethodDecl *Method);
4926
4927 /// \brief Whether this' shows up in the exception specification of a static
4928 /// member function.
4929 bool checkThisInStaticMemberFunctionExceptionSpec(CXXMethodDecl *Method);
4930
4931 /// \brief Check whether 'this' shows up in the attributes of the given
4932 /// static member function.
4933 ///
4934 /// \returns true if an error occurred.
4935 bool checkThisInStaticMemberFunctionAttributes(CXXMethodDecl *Method);
4936
4937 /// MaybeBindToTemporary - If the passed in expression has a record type with
4938 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise
4939 /// it simply returns the passed in expression.
4940 ExprResult MaybeBindToTemporary(Expr *E);
4941
4942 bool CompleteConstructorCall(CXXConstructorDecl *Constructor,
4943 MultiExprArg ArgsPtr,
4944 SourceLocation Loc,
4945 SmallVectorImpl<Expr*> &ConvertedArgs,
4946 bool AllowExplicit = false,
4947 bool IsListInitialization = false);
4948
4949 ParsedType getInheritingConstructorName(CXXScopeSpec &SS,
4950 SourceLocation NameLoc,
4951 IdentifierInfo &Name);
4952
4953 ParsedType getDestructorName(SourceLocation TildeLoc,
4954 IdentifierInfo &II, SourceLocation NameLoc,
4955 Scope *S, CXXScopeSpec &SS,
4956 ParsedType ObjectType,
4957 bool EnteringContext);
4958
4959 ParsedType getDestructorTypeForDecltype(const DeclSpec &DS,
4960 ParsedType ObjectType);
4961
4962 // Checks that reinterpret casts don't have undefined behavior.
4963 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType,
4964 bool IsDereference, SourceRange Range);
4965
4966 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's.
4967 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc,
4968 tok::TokenKind Kind,
4969 SourceLocation LAngleBracketLoc,
4970 Declarator &D,
4971 SourceLocation RAngleBracketLoc,
4972 SourceLocation LParenLoc,
4973 Expr *E,
4974 SourceLocation RParenLoc);
4975
4976 ExprResult BuildCXXNamedCast(SourceLocation OpLoc,
4977 tok::TokenKind Kind,
4978 TypeSourceInfo *Ty,
4979 Expr *E,
4980 SourceRange AngleBrackets,
4981 SourceRange Parens);
4982
4983 ExprResult BuildCXXTypeId(QualType TypeInfoType,
4984 SourceLocation TypeidLoc,
4985 TypeSourceInfo *Operand,
4986 SourceLocation RParenLoc);
4987 ExprResult BuildCXXTypeId(QualType TypeInfoType,
4988 SourceLocation TypeidLoc,
4989 Expr *Operand,
4990 SourceLocation RParenLoc);
4991
4992 /// ActOnCXXTypeid - Parse typeid( something ).
4993 ExprResult ActOnCXXTypeid(SourceLocation OpLoc,
4994 SourceLocation LParenLoc, bool isType,
4995 void *TyOrExpr,
4996 SourceLocation RParenLoc);
4997
4998 ExprResult BuildCXXUuidof(QualType TypeInfoType,
4999 SourceLocation TypeidLoc,
5000 TypeSourceInfo *Operand,
5001 SourceLocation RParenLoc);
5002 ExprResult BuildCXXUuidof(QualType TypeInfoType,
5003 SourceLocation TypeidLoc,
5004 Expr *Operand,
5005 SourceLocation RParenLoc);
5006
5007 /// ActOnCXXUuidof - Parse __uuidof( something ).
5008 ExprResult ActOnCXXUuidof(SourceLocation OpLoc,
5009 SourceLocation LParenLoc, bool isType,
5010 void *TyOrExpr,
5011 SourceLocation RParenLoc);
5012
5013 /// \brief Handle a C++1z fold-expression: ( expr op ... op expr ).
5014 ExprResult ActOnCXXFoldExpr(SourceLocation LParenLoc, Expr *LHS,
5015 tok::TokenKind Operator,
5016 SourceLocation EllipsisLoc, Expr *RHS,
5017 SourceLocation RParenLoc);
5018 ExprResult BuildCXXFoldExpr(SourceLocation LParenLoc, Expr *LHS,
5019 BinaryOperatorKind Operator,
5020 SourceLocation EllipsisLoc, Expr *RHS,
5021 SourceLocation RParenLoc);
5022 ExprResult BuildEmptyCXXFoldExpr(SourceLocation EllipsisLoc,
5023 BinaryOperatorKind Operator);
5024
5025 //// ActOnCXXThis - Parse 'this' pointer.
5026 ExprResult ActOnCXXThis(SourceLocation loc);
5027
5028 /// \brief Try to retrieve the type of the 'this' pointer.
5029 ///
5030 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type.
5031 QualType getCurrentThisType();
5032
5033 /// \brief When non-NULL, the C++ 'this' expression is allowed despite the
5034 /// current context not being a non-static member function. In such cases,
5035 /// this provides the type used for 'this'.
5036 QualType CXXThisTypeOverride;
5037
5038 /// \brief RAII object used to temporarily allow the C++ 'this' expression
5039 /// to be used, with the given qualifiers on the current class type.
5040 class CXXThisScopeRAII {
5041 Sema &S;
5042 QualType OldCXXThisTypeOverride;
5043 bool Enabled;
5044
5045 public:
5046 /// \brief Introduce a new scope where 'this' may be allowed (when enabled),
5047 /// using the given declaration (which is either a class template or a
5048 /// class) along with the given qualifiers.
5049 /// along with the qualifiers placed on '*this'.
5050 CXXThisScopeRAII(Sema &S, Decl *ContextDecl, unsigned CXXThisTypeQuals,
5051 bool Enabled = true);
5052
5053 ~CXXThisScopeRAII();
5054 };
5055
5056 /// \brief Make sure the value of 'this' is actually available in the current
5057 /// context, if it is a potentially evaluated context.
5058 ///
5059 /// \param Loc The location at which the capture of 'this' occurs.
5060 ///
5061 /// \param Explicit Whether 'this' is explicitly captured in a lambda
5062 /// capture list.
5063 ///
5064 /// \param FunctionScopeIndexToStopAt If non-null, it points to the index
5065 /// of the FunctionScopeInfo stack beyond which we do not attempt to capture.
5066 /// This is useful when enclosing lambdas must speculatively capture
5067 /// 'this' that may or may not be used in certain specializations of
5068 /// a nested generic lambda (depending on whether the name resolves to
5069 /// a non-static member function or a static function).
5070 /// \return returns 'true' if failed, 'false' if success.
5071 bool CheckCXXThisCapture(SourceLocation Loc, bool Explicit = false,
5072 bool BuildAndDiagnose = true,
5073 const unsigned *const FunctionScopeIndexToStopAt = nullptr,
5074 bool ByCopy = false);
5075
5076 /// \brief Determine whether the given type is the type of *this that is used
5077 /// outside of the body of a member function for a type that is currently
5078 /// being defined.
5079 bool isThisOutsideMemberFunctionBody(QualType BaseType);
5080
5081 /// ActOnCXXBoolLiteral - Parse {true,false} literals.
5082 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind);
5083
5084
5085 /// ActOnObjCBoolLiteral - Parse {__objc_yes,__objc_no} literals.
5086 ExprResult ActOnObjCBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind);
5087
5088 ExprResult
5089 ActOnObjCAvailabilityCheckExpr(llvm::ArrayRef<AvailabilitySpec> AvailSpecs,
5090 SourceLocation AtLoc, SourceLocation RParen);
5091
5092 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'.
5093 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc);
5094
5095 //// ActOnCXXThrow - Parse throw expressions.
5096 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr);
5097 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex,
5098 bool IsThrownVarInScope);
5099 bool CheckCXXThrowOperand(SourceLocation ThrowLoc, QualType ThrowTy, Expr *E);
5100
5101 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type.
5102 /// Can be interpreted either as function-style casting ("int(x)")
5103 /// or class type construction ("ClassType(x,y,z)")
5104 /// or creation of a value-initialized type ("int()").
5105 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep,
5106 SourceLocation LParenLoc,
5107 MultiExprArg Exprs,
5108 SourceLocation RParenLoc);
5109
5110 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type,
5111 SourceLocation LParenLoc,
5112 MultiExprArg Exprs,
5113 SourceLocation RParenLoc);
5114
5115 /// ActOnCXXNew - Parsed a C++ 'new' expression.
5116 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal,
5117 SourceLocation PlacementLParen,
5118 MultiExprArg PlacementArgs,
5119 SourceLocation PlacementRParen,
5120 SourceRange TypeIdParens, Declarator &D,
5121 Expr *Initializer);
5122 ExprResult BuildCXXNew(SourceRange Range, bool UseGlobal,
5123 SourceLocation PlacementLParen,
5124 MultiExprArg PlacementArgs,
5125 SourceLocation PlacementRParen,
5126 SourceRange TypeIdParens,
5127 QualType AllocType,
5128 TypeSourceInfo *AllocTypeInfo,
5129 Expr *ArraySize,
5130 SourceRange DirectInitRange,
5131 Expr *Initializer);
5132
5133 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc,
5134 SourceRange R);
5135 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range,
5136 bool UseGlobal, QualType AllocType, bool IsArray,
5137 bool &PassAlignment, MultiExprArg PlaceArgs,
5138 FunctionDecl *&OperatorNew,
5139 FunctionDecl *&OperatorDelete);
5140 void DeclareGlobalNewDelete();
5141 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return,
5142 ArrayRef<QualType> Params);
5143
5144 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD,
5145 DeclarationName Name, FunctionDecl* &Operator,
5146 bool Diagnose = true);
5147 FunctionDecl *FindUsualDeallocationFunction(SourceLocation StartLoc,
5148 bool CanProvideSize,
5149 bool Overaligned,
5150 DeclarationName Name);
5151 FunctionDecl *FindDeallocationFunctionForDestructor(SourceLocation StartLoc,
5152 CXXRecordDecl *RD);
5153
5154 /// ActOnCXXDelete - Parsed a C++ 'delete' expression
5155 ExprResult ActOnCXXDelete(SourceLocation StartLoc,
5156 bool UseGlobal, bool ArrayForm,
5157 Expr *Operand);
5158 void CheckVirtualDtorCall(CXXDestructorDecl *dtor, SourceLocation Loc,
5159 bool IsDelete, bool CallCanBeVirtual,
5160 bool WarnOnNonAbstractTypes,
5161 SourceLocation DtorLoc);
5162
5163 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen,
5164 Expr *Operand, SourceLocation RParen);
5165 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand,
5166 SourceLocation RParen);
5167
5168 /// \brief Parsed one of the type trait support pseudo-functions.
5169 ExprResult ActOnTypeTrait(TypeTrait Kind, SourceLocation KWLoc,
5170 ArrayRef<ParsedType> Args,
5171 SourceLocation RParenLoc);
5172 ExprResult BuildTypeTrait(TypeTrait Kind, SourceLocation KWLoc,
5173 ArrayRef<TypeSourceInfo *> Args,
5174 SourceLocation RParenLoc);
5175
5176 /// ActOnArrayTypeTrait - Parsed one of the binary type trait support
5177 /// pseudo-functions.
5178 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT,
5179 SourceLocation KWLoc,
5180 ParsedType LhsTy,
5181 Expr *DimExpr,
5182 SourceLocation RParen);
5183
5184 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT,
5185 SourceLocation KWLoc,
5186 TypeSourceInfo *TSInfo,
5187 Expr *DimExpr,
5188 SourceLocation RParen);
5189
5190 /// ActOnExpressionTrait - Parsed one of the unary type trait support
5191 /// pseudo-functions.
5192 ExprResult ActOnExpressionTrait(ExpressionTrait OET,
5193 SourceLocation KWLoc,
5194 Expr *Queried,
5195 SourceLocation RParen);
5196
5197 ExprResult BuildExpressionTrait(ExpressionTrait OET,
5198 SourceLocation KWLoc,
5199 Expr *Queried,
5200 SourceLocation RParen);
5201
5202 ExprResult ActOnStartCXXMemberReference(Scope *S,
5203 Expr *Base,
5204 SourceLocation OpLoc,
5205 tok::TokenKind OpKind,
5206 ParsedType &ObjectType,
5207 bool &MayBePseudoDestructor);
5208
5209 ExprResult BuildPseudoDestructorExpr(Expr *Base,
5210 SourceLocation OpLoc,
5211 tok::TokenKind OpKind,
5212 const CXXScopeSpec &SS,
5213 TypeSourceInfo *ScopeType,
5214 SourceLocation CCLoc,
5215 SourceLocation TildeLoc,
5216 PseudoDestructorTypeStorage DestroyedType);
5217
5218 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base,
5219 SourceLocation OpLoc,
5220 tok::TokenKind OpKind,
5221 CXXScopeSpec &SS,
5222 UnqualifiedId &FirstTypeName,
5223 SourceLocation CCLoc,
5224 SourceLocation TildeLoc,
5225 UnqualifiedId &SecondTypeName);
5226
5227 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base,
5228 SourceLocation OpLoc,
5229 tok::TokenKind OpKind,
5230 SourceLocation TildeLoc,
5231 const DeclSpec& DS);
5232
5233 /// MaybeCreateExprWithCleanups - If the current full-expression
5234 /// requires any cleanups, surround it with a ExprWithCleanups node.
5235 /// Otherwise, just returns the passed-in expression.
5236 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr);
5237 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt);
5238 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr);
5239
5240 MaterializeTemporaryExpr *
5241 CreateMaterializeTemporaryExpr(QualType T, Expr *Temporary,
5242 bool BoundToLvalueReference);
5243
5244 ExprResult ActOnFinishFullExpr(Expr *Expr) {
5245 return ActOnFinishFullExpr(Expr, Expr ? Expr->getExprLoc()
5246 : SourceLocation());
5247 }
5248 ExprResult ActOnFinishFullExpr(Expr *Expr, SourceLocation CC,
5249 bool DiscardedValue = false,
5250 bool IsConstexpr = false,
5251 bool IsLambdaInitCaptureInitializer = false);
5252 StmtResult ActOnFinishFullStmt(Stmt *Stmt);
5253
5254 // Marks SS invalid if it represents an incomplete type.
5255 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC);
5256
5257 DeclContext *computeDeclContext(QualType T);
5258 DeclContext *computeDeclContext(const CXXScopeSpec &SS,
5259 bool EnteringContext = false);
5260 bool isDependentScopeSpecifier(const CXXScopeSpec &SS);
5261 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS);
5262
5263 /// \brief The parser has parsed a global nested-name-specifier '::'.
5264 ///
5265 /// \param CCLoc The location of the '::'.
5266 ///
5267 /// \param SS The nested-name-specifier, which will be updated in-place
5268 /// to reflect the parsed nested-name-specifier.
5269 ///
5270 /// \returns true if an error occurred, false otherwise.
5271 bool ActOnCXXGlobalScopeSpecifier(SourceLocation CCLoc, CXXScopeSpec &SS);
5272
5273 /// \brief The parser has parsed a '__super' nested-name-specifier.
5274 ///
5275 /// \param SuperLoc The location of the '__super' keyword.
5276 ///
5277 /// \param ColonColonLoc The location of the '::'.
5278 ///
5279 /// \param SS The nested-name-specifier, which will be updated in-place
5280 /// to reflect the parsed nested-name-specifier.
5281 ///
5282 /// \returns true if an error occurred, false otherwise.
5283 bool ActOnSuperScopeSpecifier(SourceLocation SuperLoc,
5284 SourceLocation ColonColonLoc, CXXScopeSpec &SS);
5285
5286 bool isAcceptableNestedNameSpecifier(const NamedDecl *SD,
5287 bool *CanCorrect = nullptr);
5288 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS);
5289
5290 /// \brief Keeps information about an identifier in a nested-name-spec.
5291 ///
5292 struct NestedNameSpecInfo {
5293 /// \brief The type of the object, if we're parsing nested-name-specifier in
5294 /// a member access expression.
5295 ParsedType ObjectType;
5296
5297 /// \brief The identifier preceding the '::'.
5298 IdentifierInfo *Identifier;
5299
5300 /// \brief The location of the identifier.
5301 SourceLocation IdentifierLoc;
5302
5303 /// \brief The location of the '::'.
5304 SourceLocation CCLoc;
5305
5306 /// \brief Creates info object for the most typical case.
5307 NestedNameSpecInfo(IdentifierInfo *II, SourceLocation IdLoc,
5308 SourceLocation ColonColonLoc, ParsedType ObjectType = ParsedType())
5309 : ObjectType(ObjectType), Identifier(II), IdentifierLoc(IdLoc),
5310 CCLoc(ColonColonLoc) {
5311 }
5312
5313 NestedNameSpecInfo(IdentifierInfo *II, SourceLocation IdLoc,
5314 SourceLocation ColonColonLoc, QualType ObjectType)
5315 : ObjectType(ParsedType::make(ObjectType)), Identifier(II),
5316 IdentifierLoc(IdLoc), CCLoc(ColonColonLoc) {
5317 }
5318 };
5319
5320 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS,
5321 NestedNameSpecInfo &IdInfo);
5322
5323 bool BuildCXXNestedNameSpecifier(Scope *S,
5324 NestedNameSpecInfo &IdInfo,
5325 bool EnteringContext,
5326 CXXScopeSpec &SS,
5327 NamedDecl *ScopeLookupResult,
5328 bool ErrorRecoveryLookup,
5329 bool *IsCorrectedToColon = nullptr,
5330 bool OnlyNamespace = false);
5331
5332 /// \brief The parser has parsed a nested-name-specifier 'identifier::'.
5333 ///
5334 /// \param S The scope in which this nested-name-specifier occurs.
5335 ///
5336 /// \param IdInfo Parser information about an identifier in the
5337 /// nested-name-spec.
5338 ///
5339 /// \param EnteringContext Whether we're entering the context nominated by
5340 /// this nested-name-specifier.
5341 ///
5342 /// \param SS The nested-name-specifier, which is both an input
5343 /// parameter (the nested-name-specifier before this type) and an
5344 /// output parameter (containing the full nested-name-specifier,
5345 /// including this new type).
5346 ///
5347 /// \param ErrorRecoveryLookup If true, then this method is called to improve
5348 /// error recovery. In this case do not emit error message.
5349 ///
5350 /// \param IsCorrectedToColon If not null, suggestions to replace '::' -> ':'
5351 /// are allowed. The bool value pointed by this parameter is set to 'true'
5352 /// if the identifier is treated as if it was followed by ':', not '::'.
5353 ///
5354 /// \param OnlyNamespace If true, only considers namespaces in lookup.
5355 ///
5356 /// \returns true if an error occurred, false otherwise.
5357 bool ActOnCXXNestedNameSpecifier(Scope *S,
5358 NestedNameSpecInfo &IdInfo,
5359 bool EnteringContext,
5360 CXXScopeSpec &SS,
5361 bool ErrorRecoveryLookup = false,
5362 bool *IsCorrectedToColon = nullptr,
5363 bool OnlyNamespace = false);
5364
5365 ExprResult ActOnDecltypeExpression(Expr *E);
5366
5367 bool ActOnCXXNestedNameSpecifierDecltype(CXXScopeSpec &SS,
5368 const DeclSpec &DS,
5369 SourceLocation ColonColonLoc);
5370
5371 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS,
5372 NestedNameSpecInfo &IdInfo,
5373 bool EnteringContext);
5374
5375 /// \brief The parser has parsed a nested-name-specifier
5376 /// 'template[opt] template-name < template-args >::'.
5377 ///
5378 /// \param S The scope in which this nested-name-specifier occurs.
5379 ///
5380 /// \param SS The nested-name-specifier, which is both an input
5381 /// parameter (the nested-name-specifier before this type) and an
5382 /// output parameter (containing the full nested-name-specifier,
5383 /// including this new type).
5384 ///
5385 /// \param TemplateKWLoc the location of the 'template' keyword, if any.
5386 /// \param TemplateName the template name.
5387 /// \param TemplateNameLoc The location of the template name.
5388 /// \param LAngleLoc The location of the opening angle bracket ('<').
5389 /// \param TemplateArgs The template arguments.
5390 /// \param RAngleLoc The location of the closing angle bracket ('>').
5391 /// \param CCLoc The location of the '::'.
5392 ///
5393 /// \param EnteringContext Whether we're entering the context of the
5394 /// nested-name-specifier.
5395 ///
5396 ///
5397 /// \returns true if an error occurred, false otherwise.
5398 bool ActOnCXXNestedNameSpecifier(Scope *S,
5399 CXXScopeSpec &SS,
5400 SourceLocation TemplateKWLoc,
5401 TemplateTy TemplateName,
5402 SourceLocation TemplateNameLoc,
5403 SourceLocation LAngleLoc,
5404 ASTTemplateArgsPtr TemplateArgs,
5405 SourceLocation RAngleLoc,
5406 SourceLocation CCLoc,
5407 bool EnteringContext);
5408
5409 /// \brief Given a C++ nested-name-specifier, produce an annotation value
5410 /// that the parser can use later to reconstruct the given
5411 /// nested-name-specifier.
5412 ///
5413 /// \param SS A nested-name-specifier.
5414 ///
5415 /// \returns A pointer containing all of the information in the
5416 /// nested-name-specifier \p SS.
5417 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS);
5418
5419 /// \brief Given an annotation pointer for a nested-name-specifier, restore
5420 /// the nested-name-specifier structure.
5421 ///
5422 /// \param Annotation The annotation pointer, produced by
5423 /// \c SaveNestedNameSpecifierAnnotation().
5424 ///
5425 /// \param AnnotationRange The source range corresponding to the annotation.
5426 ///
5427 /// \param SS The nested-name-specifier that will be updated with the contents
5428 /// of the annotation pointer.
5429 void RestoreNestedNameSpecifierAnnotation(void *Annotation,
5430 SourceRange AnnotationRange,
5431 CXXScopeSpec &SS);
5432
5433 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS);
5434
5435 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global
5436 /// scope or nested-name-specifier) is parsed, part of a declarator-id.
5437 /// After this method is called, according to [C++ 3.4.3p3], names should be
5438 /// looked up in the declarator-id's scope, until the declarator is parsed and
5439 /// ActOnCXXExitDeclaratorScope is called.
5440 /// The 'SS' should be a non-empty valid CXXScopeSpec.
5441 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS);
5442
5443 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously
5444 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same
5445 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well.
5446 /// Used to indicate that names should revert to being looked up in the
5447 /// defining scope.
5448 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS);
5449
5450 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an
5451 /// initializer for the declaration 'Dcl'.
5452 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a
5453 /// static data member of class X, names should be looked up in the scope of
5454 /// class X.
5455 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl);
5456
5457 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an
5458 /// initializer for the declaration 'Dcl'.
5459 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl);
5460
5461 /// \brief Create a new lambda closure type.
5462 CXXRecordDecl *createLambdaClosureType(SourceRange IntroducerRange,
5463 TypeSourceInfo *Info,
5464 bool KnownDependent,
5465 LambdaCaptureDefault CaptureDefault);
5466
5467 /// \brief Start the definition of a lambda expression.
5468 CXXMethodDecl *startLambdaDefinition(CXXRecordDecl *Class,
5469 SourceRange IntroducerRange,
5470 TypeSourceInfo *MethodType,
5471 SourceLocation EndLoc,
5472 ArrayRef<ParmVarDecl *> Params,
5473 bool IsConstexprSpecified);
5474
5475 /// \brief Endow the lambda scope info with the relevant properties.
5476 void buildLambdaScope(sema::LambdaScopeInfo *LSI,
5477 CXXMethodDecl *CallOperator,
5478 SourceRange IntroducerRange,
5479 LambdaCaptureDefault CaptureDefault,
5480 SourceLocation CaptureDefaultLoc,
5481 bool ExplicitParams,
5482 bool ExplicitResultType,
5483 bool Mutable);
5484
5485 /// \brief Perform initialization analysis of the init-capture and perform
5486 /// any implicit conversions such as an lvalue-to-rvalue conversion if
5487 /// not being used to initialize a reference.
5488 ParsedType actOnLambdaInitCaptureInitialization(
5489 SourceLocation Loc, bool ByRef, IdentifierInfo *Id,
5490 LambdaCaptureInitKind InitKind, Expr *&Init) {
5491 return ParsedType::make(buildLambdaInitCaptureInitialization(
5492 Loc, ByRef, Id, InitKind != LambdaCaptureInitKind::CopyInit, Init));
5493 }
5494 QualType buildLambdaInitCaptureInitialization(SourceLocation Loc, bool ByRef,
5495 IdentifierInfo *Id,
5496 bool DirectInit, Expr *&Init);
5497
5498 /// \brief Create a dummy variable within the declcontext of the lambda's
5499 /// call operator, for name lookup purposes for a lambda init capture.
5500 ///
5501 /// CodeGen handles emission of lambda captures, ignoring these dummy
5502 /// variables appropriately.
5503 VarDecl *createLambdaInitCaptureVarDecl(SourceLocation Loc,
5504 QualType InitCaptureType,
5505 IdentifierInfo *Id,
5506 unsigned InitStyle, Expr *Init);
5507
5508 /// \brief Build the implicit field for an init-capture.
5509 FieldDecl *buildInitCaptureField(sema::LambdaScopeInfo *LSI, VarDecl *Var);
5510
5511 /// \brief Note that we have finished the explicit captures for the
5512 /// given lambda.
5513 void finishLambdaExplicitCaptures(sema::LambdaScopeInfo *LSI);
5514
5515 /// \brief Introduce the lambda parameters into scope.
5516 void addLambdaParameters(CXXMethodDecl *CallOperator, Scope *CurScope);
5517
5518 /// \brief Deduce a block or lambda's return type based on the return
5519 /// statements present in the body.
5520 void deduceClosureReturnType(sema::CapturingScopeInfo &CSI);
5521
5522 /// ActOnStartOfLambdaDefinition - This is called just before we start
5523 /// parsing the body of a lambda; it analyzes the explicit captures and
5524 /// arguments, and sets up various data-structures for the body of the
5525 /// lambda.
5526 void ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro,
5527 Declarator &ParamInfo, Scope *CurScope);
5528
5529 /// ActOnLambdaError - If there is an error parsing a lambda, this callback
5530 /// is invoked to pop the information about the lambda.
5531 void ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope,
5532 bool IsInstantiation = false);
5533
5534 /// ActOnLambdaExpr - This is called when the body of a lambda expression
5535 /// was successfully completed.
5536 ExprResult ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body,
5537 Scope *CurScope);
5538
5539 /// \brief Does copying/destroying the captured variable have side effects?
5540 bool CaptureHasSideEffects(const sema::LambdaScopeInfo::Capture &From);
5541
5542 /// \brief Diagnose if an explicit lambda capture is unused.
5543 void DiagnoseUnusedLambdaCapture(const sema::LambdaScopeInfo::Capture &From);
5544
5545 /// \brief Complete a lambda-expression having processed and attached the
5546 /// lambda body.
5547 ExprResult BuildLambdaExpr(SourceLocation StartLoc, SourceLocation EndLoc,
5548 sema::LambdaScopeInfo *LSI);
5549
5550 /// \brief Define the "body" of the conversion from a lambda object to a
5551 /// function pointer.
5552 ///
5553 /// This routine doesn't actually define a sensible body; rather, it fills
5554 /// in the initialization expression needed to copy the lambda object into
5555 /// the block, and IR generation actually generates the real body of the
5556 /// block pointer conversion.
5557 void DefineImplicitLambdaToFunctionPointerConversion(
5558 SourceLocation CurrentLoc, CXXConversionDecl *Conv);
5559
5560 /// \brief Define the "body" of the conversion from a lambda object to a
5561 /// block pointer.
5562 ///
5563 /// This routine doesn't actually define a sensible body; rather, it fills
5564 /// in the initialization expression needed to copy the lambda object into
5565 /// the block, and IR generation actually generates the real body of the
5566 /// block pointer conversion.
5567 void DefineImplicitLambdaToBlockPointerConversion(SourceLocation CurrentLoc,
5568 CXXConversionDecl *Conv);
5569
5570 ExprResult BuildBlockForLambdaConversion(SourceLocation CurrentLocation,
5571 SourceLocation ConvLocation,
5572 CXXConversionDecl *Conv,
5573 Expr *Src);
5574
5575 // ParseObjCStringLiteral - Parse Objective-C string literals.
5576 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs,
5577 ArrayRef<Expr *> Strings);
5578
5579 ExprResult BuildObjCStringLiteral(SourceLocation AtLoc, StringLiteral *S);
5580
5581 /// BuildObjCNumericLiteral - builds an ObjCBoxedExpr AST node for the
5582 /// numeric literal expression. Type of the expression will be "NSNumber *"
5583 /// or "id" if NSNumber is unavailable.
5584 ExprResult BuildObjCNumericLiteral(SourceLocation AtLoc, Expr *Number);
5585 ExprResult ActOnObjCBoolLiteral(SourceLocation AtLoc, SourceLocation ValueLoc,
5586 bool Value);
5587 ExprResult BuildObjCArrayLiteral(SourceRange SR, MultiExprArg Elements);
5588
5589 /// BuildObjCBoxedExpr - builds an ObjCBoxedExpr AST node for the
5590 /// '@' prefixed parenthesized expression. The type of the expression will
5591 /// either be "NSNumber *", "NSString *" or "NSValue *" depending on the type
5592 /// of ValueType, which is allowed to be a built-in numeric type, "char *",
5593 /// "const char *" or C structure with attribute 'objc_boxable'.
5594 ExprResult BuildObjCBoxedExpr(SourceRange SR, Expr *ValueExpr);
5595
5596 ExprResult BuildObjCSubscriptExpression(SourceLocation RB, Expr *BaseExpr,
5597 Expr *IndexExpr,
5598 ObjCMethodDecl *getterMethod,
5599 ObjCMethodDecl *setterMethod);
5600
5601 ExprResult BuildObjCDictionaryLiteral(SourceRange SR,
5602 MutableArrayRef<ObjCDictionaryElement> Elements);
5603
5604 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc,
5605 TypeSourceInfo *EncodedTypeInfo,
5606 SourceLocation RParenLoc);
5607 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl,
5608 CXXConversionDecl *Method,
5609 bool HadMultipleCandidates);
5610
5611 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc,
5612 SourceLocation EncodeLoc,
5613 SourceLocation LParenLoc,
5614 ParsedType Ty,
5615 SourceLocation RParenLoc);
5616
5617 /// ParseObjCSelectorExpression - Build selector expression for \@selector
5618 ExprResult ParseObjCSelectorExpression(Selector Sel,
5619 SourceLocation AtLoc,
5620 SourceLocation SelLoc,
5621 SourceLocation LParenLoc,
5622 SourceLocation RParenLoc,
5623 bool WarnMultipleSelectors);
5624
5625 /// ParseObjCProtocolExpression - Build protocol expression for \@protocol
5626 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName,
5627 SourceLocation AtLoc,
5628 SourceLocation ProtoLoc,
5629 SourceLocation LParenLoc,
5630 SourceLocation ProtoIdLoc,
5631 SourceLocation RParenLoc);
5632
5633 //===--------------------------------------------------------------------===//
5634 // C++ Declarations
5635 //
5636 Decl *ActOnStartLinkageSpecification(Scope *S,
5637 SourceLocation ExternLoc,
5638 Expr *LangStr,
5639 SourceLocation LBraceLoc);
5640 Decl *ActOnFinishLinkageSpecification(Scope *S,
5641 Decl *LinkageSpec,
5642 SourceLocation RBraceLoc);
5643
5644
5645 //===--------------------------------------------------------------------===//
5646 // C++ Classes
5647 //
5648 bool isCurrentClassName(const IdentifierInfo &II, Scope *S,
5649 const CXXScopeSpec *SS = nullptr);
5650 bool isCurrentClassNameTypo(IdentifierInfo *&II, const CXXScopeSpec *SS);
5651
5652 bool ActOnAccessSpecifier(AccessSpecifier Access,
5653 SourceLocation ASLoc,
5654 SourceLocation ColonLoc,
5655 AttributeList *Attrs = nullptr);
5656
5657 NamedDecl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS,
5658 Declarator &D,
5659 MultiTemplateParamsArg TemplateParameterLists,
5660 Expr *BitfieldWidth, const VirtSpecifiers &VS,
5661 InClassInitStyle InitStyle);
5662
5663 void ActOnStartCXXInClassMemberInitializer();
5664 void ActOnFinishCXXInClassMemberInitializer(Decl *VarDecl,
5665 SourceLocation EqualLoc,
5666 Expr *Init);
5667
5668 MemInitResult ActOnMemInitializer(Decl *ConstructorD,
5669 Scope *S,
5670 CXXScopeSpec &SS,
5671 IdentifierInfo *MemberOrBase,
5672 ParsedType TemplateTypeTy,
5673 const DeclSpec &DS,
5674 SourceLocation IdLoc,
5675 SourceLocation LParenLoc,
5676 ArrayRef<Expr *> Args,
5677 SourceLocation RParenLoc,
5678 SourceLocation EllipsisLoc);
5679
5680 MemInitResult ActOnMemInitializer(Decl *ConstructorD,
5681 Scope *S,
5682 CXXScopeSpec &SS,
5683 IdentifierInfo *MemberOrBase,
5684 ParsedType TemplateTypeTy,
5685 const DeclSpec &DS,
5686 SourceLocation IdLoc,
5687 Expr *InitList,
5688 SourceLocation EllipsisLoc);
5689
5690 MemInitResult BuildMemInitializer(Decl *ConstructorD,
5691 Scope *S,
5692 CXXScopeSpec &SS,
5693 IdentifierInfo *MemberOrBase,
5694 ParsedType TemplateTypeTy,
5695 const DeclSpec &DS,
5696 SourceLocation IdLoc,
5697 Expr *Init,
5698 SourceLocation EllipsisLoc);
5699
5700 MemInitResult BuildMemberInitializer(ValueDecl *Member,
5701 Expr *Init,
5702 SourceLocation IdLoc);
5703
5704 MemInitResult BuildBaseInitializer(QualType BaseType,
5705 TypeSourceInfo *BaseTInfo,
5706 Expr *Init,
5707 CXXRecordDecl *ClassDecl,
5708 SourceLocation EllipsisLoc);
5709
5710 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo,
5711 Expr *Init,
5712 CXXRecordDecl *ClassDecl);
5713
5714 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor,
5715 CXXCtorInitializer *Initializer);
5716
5717 bool SetCtorInitializers(CXXConstructorDecl *Constructor, bool AnyErrors,
5718 ArrayRef<CXXCtorInitializer *> Initializers = None);
5719
5720 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation);
5721
5722
5723 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl,
5724 /// mark all the non-trivial destructors of its members and bases as
5725 /// referenced.
5726 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc,
5727 CXXRecordDecl *Record);
5728
5729 /// \brief The list of classes whose vtables have been used within
5730 /// this translation unit, and the source locations at which the
5731 /// first use occurred.
5732 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse;
5733
5734 /// \brief The list of vtables that are required but have not yet been
5735 /// materialized.
5736 SmallVector<VTableUse, 16> VTableUses;
5737
5738 /// \brief The set of classes whose vtables have been used within
5739 /// this translation unit, and a bit that will be true if the vtable is
5740 /// required to be emitted (otherwise, it should be emitted only if needed
5741 /// by code generation).
5742 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed;
5743
5744 /// \brief Load any externally-stored vtable uses.
5745 void LoadExternalVTableUses();
5746
5747 /// \brief Note that the vtable for the given class was used at the
5748 /// given location.
5749 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class,
5750 bool DefinitionRequired = false);
5751
5752 /// \brief Mark the exception specifications of all virtual member functions
5753 /// in the given class as needed.
5754 void MarkVirtualMemberExceptionSpecsNeeded(SourceLocation Loc,
5755 const CXXRecordDecl *RD);
5756
5757 /// MarkVirtualMembersReferenced - Will mark all members of the given
5758 /// CXXRecordDecl referenced.
5759 void MarkVirtualMembersReferenced(SourceLocation Loc,
5760 const CXXRecordDecl *RD);
5761
5762 /// \brief Define all of the vtables that have been used in this
5763 /// translation unit and reference any virtual members used by those
5764 /// vtables.
5765 ///
5766 /// \returns true if any work was done, false otherwise.
5767 bool DefineUsedVTables();
5768
5769 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl);
5770
5771 void ActOnMemInitializers(Decl *ConstructorDecl,
5772 SourceLocation ColonLoc,
5773 ArrayRef<CXXCtorInitializer*> MemInits,
5774 bool AnyErrors);
5775
5776 /// \brief Check class-level dllimport/dllexport attribute. The caller must
5777 /// ensure that referenceDLLExportedClassMethods is called some point later
5778 /// when all outer classes of Class are complete.
5779 void checkClassLevelDLLAttribute(CXXRecordDecl *Class);
5780
5781 void referenceDLLExportedClassMethods();
5782
5783 void propagateDLLAttrToBaseClassTemplate(
5784 CXXRecordDecl *Class, Attr *ClassAttr,
5785 ClassTemplateSpecializationDecl *BaseTemplateSpec,
5786 SourceLocation BaseLoc);
5787
5788 void CheckCompletedCXXClass(CXXRecordDecl *Record);
5789 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc,
5790 Decl *TagDecl,
5791 SourceLocation LBrac,
5792 SourceLocation RBrac,
5793 AttributeList *AttrList);
5794 void ActOnFinishCXXMemberDecls();
5795 void ActOnFinishCXXNonNestedClass(Decl *D);
5796
5797 void ActOnReenterCXXMethodParameter(Scope *S, ParmVarDecl *Param);
5798 unsigned ActOnReenterTemplateScope(Scope *S, Decl *Template);
5799 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record);
5800 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method);
5801 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param);
5802 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record);
5803 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method);
5804 void ActOnFinishDelayedMemberInitializers(Decl *Record);
5805 void MarkAsLateParsedTemplate(FunctionDecl *FD, Decl *FnD,
5806 CachedTokens &Toks);
5807 void UnmarkAsLateParsedTemplate(FunctionDecl *FD);
5808 bool IsInsideALocalClassWithinATemplateFunction();
5809
5810 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc,
5811 Expr *AssertExpr,
5812 Expr *AssertMessageExpr,
5813 SourceLocation RParenLoc);
5814 Decl *BuildStaticAssertDeclaration(SourceLocation StaticAssertLoc,
5815 Expr *AssertExpr,
5816 StringLiteral *AssertMessageExpr,
5817 SourceLocation RParenLoc,
5818 bool Failed);
5819
5820 FriendDecl *CheckFriendTypeDecl(SourceLocation LocStart,
5821 SourceLocation FriendLoc,
5822 TypeSourceInfo *TSInfo);
5823 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS,
5824 MultiTemplateParamsArg TemplateParams);
5825 NamedDecl *ActOnFriendFunctionDecl(Scope *S, Declarator &D,
5826 MultiTemplateParamsArg TemplateParams);
5827
5828 QualType CheckConstructorDeclarator(Declarator &D, QualType R,
5829 StorageClass& SC);
5830 void CheckConstructor(CXXConstructorDecl *Constructor);
5831 QualType CheckDestructorDeclarator(Declarator &D, QualType R,
5832 StorageClass& SC);
5833 bool CheckDestructor(CXXDestructorDecl *Destructor);
5834 void CheckConversionDeclarator(Declarator &D, QualType &R,
5835 StorageClass& SC);
5836 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion);
5837 void CheckDeductionGuideDeclarator(Declarator &D, QualType &R,
5838 StorageClass &SC);
5839 void CheckDeductionGuideTemplate(FunctionTemplateDecl *TD);
5840
5841 void CheckExplicitlyDefaultedSpecialMember(CXXMethodDecl *MD);
5842 void CheckExplicitlyDefaultedMemberExceptionSpec(CXXMethodDecl *MD,
5843 const FunctionProtoType *T);
5844 void CheckDelayedMemberExceptionSpecs();
5845
5846 //===--------------------------------------------------------------------===//
5847 // C++ Derived Classes
5848 //
5849
5850 /// ActOnBaseSpecifier - Parsed a base specifier
5851 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class,
5852 SourceRange SpecifierRange,
5853 bool Virtual, AccessSpecifier Access,
5854 TypeSourceInfo *TInfo,
5855 SourceLocation EllipsisLoc);
5856
5857 BaseResult ActOnBaseSpecifier(Decl *classdecl,
5858 SourceRange SpecifierRange,
5859 ParsedAttributes &Attrs,
5860 bool Virtual, AccessSpecifier Access,
5861 ParsedType basetype,
5862 SourceLocation BaseLoc,
5863 SourceLocation EllipsisLoc);
5864
5865 bool AttachBaseSpecifiers(CXXRecordDecl *Class,
5866 MutableArrayRef<CXXBaseSpecifier *> Bases);
5867 void ActOnBaseSpecifiers(Decl *ClassDecl,
5868 MutableArrayRef<CXXBaseSpecifier *> Bases);
5869
5870 bool IsDerivedFrom(SourceLocation Loc, QualType Derived, QualType Base);
5871 bool IsDerivedFrom(SourceLocation Loc, QualType Derived, QualType Base,
5872 CXXBasePaths &Paths);
5873
5874 // FIXME: I don't like this name.
5875 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath);
5876
5877 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base,
5878 SourceLocation Loc, SourceRange Range,
5879 CXXCastPath *BasePath = nullptr,
5880 bool IgnoreAccess = false);
5881 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base,
5882 unsigned InaccessibleBaseID,
5883 unsigned AmbigiousBaseConvID,
5884 SourceLocation Loc, SourceRange Range,
5885 DeclarationName Name,
5886 CXXCastPath *BasePath,
5887 bool IgnoreAccess = false);
5888
5889 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths);
5890
5891 bool CheckOverridingFunctionAttributes(const CXXMethodDecl *New,
5892 const CXXMethodDecl *Old);
5893
5894 /// CheckOverridingFunctionReturnType - Checks whether the return types are
5895 /// covariant, according to C++ [class.virtual]p5.
5896 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New,
5897 const CXXMethodDecl *Old);
5898
5899 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception
5900 /// spec is a subset of base spec.
5901 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New,
5902 const CXXMethodDecl *Old);
5903
5904 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange);
5905
5906 /// CheckOverrideControl - Check C++11 override control semantics.
5907 void CheckOverrideControl(NamedDecl *D);
5908
5909 /// DiagnoseAbsenceOfOverrideControl - Diagnose if 'override' keyword was
5910 /// not used in the declaration of an overriding method.
5911 void DiagnoseAbsenceOfOverrideControl(NamedDecl *D);
5912
5913 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function
5914 /// overrides a virtual member function marked 'final', according to
5915 /// C++11 [class.virtual]p4.
5916 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New,
5917 const CXXMethodDecl *Old);
5918
5919
5920 //===--------------------------------------------------------------------===//
5921 // C++ Access Control
5922 //
5923
5924 enum AccessResult {
5925 AR_accessible,
5926 AR_inaccessible,
5927 AR_dependent,
5928 AR_delayed
5929 };
5930
5931 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl,
5932 NamedDecl *PrevMemberDecl,
5933 AccessSpecifier LexicalAS);
5934
5935 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E,
5936 DeclAccessPair FoundDecl);
5937 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E,
5938 DeclAccessPair FoundDecl);
5939 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc,
5940 SourceRange PlacementRange,
5941 CXXRecordDecl *NamingClass,
5942 DeclAccessPair FoundDecl,
5943 bool Diagnose = true);
5944 AccessResult CheckConstructorAccess(SourceLocation Loc,
5945 CXXConstructorDecl *D,
5946 DeclAccessPair FoundDecl,
5947 const InitializedEntity &Entity,
5948 bool IsCopyBindingRefToTemp = false);
5949 AccessResult CheckConstructorAccess(SourceLocation Loc,
5950 CXXConstructorDecl *D,
5951 DeclAccessPair FoundDecl,
5952 const InitializedEntity &Entity,
5953 const PartialDiagnostic &PDiag);
5954 AccessResult CheckDestructorAccess(SourceLocation Loc,
5955 CXXDestructorDecl *Dtor,
5956 const PartialDiagnostic &PDiag,
5957 QualType objectType = QualType());
5958 AccessResult CheckFriendAccess(NamedDecl *D);
5959 AccessResult CheckMemberAccess(SourceLocation UseLoc,
5960 CXXRecordDecl *NamingClass,
5961 DeclAccessPair Found);
5962 AccessResult CheckMemberOperatorAccess(SourceLocation Loc,
5963 Expr *ObjectExpr,
5964 Expr *ArgExpr,
5965 DeclAccessPair FoundDecl);
5966 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr,
5967 DeclAccessPair FoundDecl);
5968 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc,
5969 QualType Base, QualType Derived,
5970 const CXXBasePath &Path,
5971 unsigned DiagID,
5972 bool ForceCheck = false,
5973 bool ForceUnprivileged = false);
5974 void CheckLookupAccess(const LookupResult &R);
5975 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx);
5976 bool isSpecialMemberAccessibleForDeletion(CXXMethodDecl *decl,
5977 AccessSpecifier access,
5978 QualType objectType);
5979
5980 void HandleDependentAccessCheck(const DependentDiagnostic &DD,
5981 const MultiLevelTemplateArgumentList &TemplateArgs);
5982 void PerformDependentDiagnostics(const DeclContext *Pattern,
5983 const MultiLevelTemplateArgumentList &TemplateArgs);
5984
5985 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx);
5986
5987 /// \brief When true, access checking violations are treated as SFINAE
5988 /// failures rather than hard errors.
5989 bool AccessCheckingSFINAE;
5990
5991 enum AbstractDiagSelID {
5992 AbstractNone = -1,
5993 AbstractReturnType,
5994 AbstractParamType,
5995 AbstractVariableType,
5996 AbstractFieldType,
5997 AbstractIvarType,
5998 AbstractSynthesizedIvarType,
5999 AbstractArrayType
6000 };
6001
6002 bool isAbstractType(SourceLocation Loc, QualType T);
6003 bool RequireNonAbstractType(SourceLocation Loc, QualType T,
6004 TypeDiagnoser &Diagnoser);
6005 template <typename... Ts>
6006 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID,
6007 const Ts &...Args) {
6008 BoundTypeDiagnoser<Ts...> Diagnoser(DiagID, Args...);
6009 return RequireNonAbstractType(Loc, T, Diagnoser);
6010 }
6011
6012 void DiagnoseAbstractType(const CXXRecordDecl *RD);
6013
6014 //===--------------------------------------------------------------------===//
6015 // C++ Overloaded Operators [C++ 13.5]
6016 //
6017
6018 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl);
6019
6020 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl);
6021
6022 //===--------------------------------------------------------------------===//
6023 // C++ Templates [C++ 14]
6024 //
6025 void FilterAcceptableTemplateNames(LookupResult &R,
6026 bool AllowFunctionTemplates = true);
6027 bool hasAnyAcceptableTemplateNames(LookupResult &R,
6028 bool AllowFunctionTemplates = true);
6029
6030 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS,
6031 QualType ObjectType, bool EnteringContext,
6032 bool &MemberOfUnknownSpecialization);
6033
6034 TemplateNameKind isTemplateName(Scope *S,
6035 CXXScopeSpec &SS,
6036 bool hasTemplateKeyword,
6037 UnqualifiedId &Name,
6038 ParsedType ObjectType,
6039 bool EnteringContext,
6040 TemplateTy &Template,
6041 bool &MemberOfUnknownSpecialization);
6042
6043 /// Determine whether a particular identifier might be the name in a C++1z
6044 /// deduction-guide declaration.
6045 bool isDeductionGuideName(Scope *S, const IdentifierInfo &Name,
6046 SourceLocation NameLoc,
6047 ParsedTemplateTy *Template = nullptr);
6048
6049 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II,
6050 SourceLocation IILoc,
6051 Scope *S,
6052 const CXXScopeSpec *SS,
6053 TemplateTy &SuggestedTemplate,
6054 TemplateNameKind &SuggestedKind);
6055
6056 bool DiagnoseUninstantiableTemplate(SourceLocation PointOfInstantiation,
6057 NamedDecl *Instantiation,
6058 bool InstantiatedFromMember,
6059 const NamedDecl *Pattern,
6060 const NamedDecl *PatternDef,
6061 TemplateSpecializationKind TSK,
6062 bool Complain = true);
6063
6064 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl);
6065 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl);
6066
6067 Decl *ActOnTypeParameter(Scope *S, bool Typename,
6068 SourceLocation EllipsisLoc,
6069 SourceLocation KeyLoc,
6070 IdentifierInfo *ParamName,
6071 SourceLocation ParamNameLoc,
6072 unsigned Depth, unsigned Position,
6073 SourceLocation EqualLoc,
6074 ParsedType DefaultArg);
6075
6076 QualType CheckNonTypeTemplateParameterType(TypeSourceInfo *&TSI,
6077 SourceLocation Loc);
6078 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc);
6079
6080 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D,
6081 unsigned Depth,
6082 unsigned Position,
6083 SourceLocation EqualLoc,
6084 Expr *DefaultArg);
6085 Decl *ActOnTemplateTemplateParameter(Scope *S,
6086 SourceLocation TmpLoc,
6087 TemplateParameterList *Params,
6088 SourceLocation EllipsisLoc,
6089 IdentifierInfo *ParamName,
6090 SourceLocation ParamNameLoc,
6091 unsigned Depth,
6092 unsigned Position,
6093 SourceLocation EqualLoc,
6094 ParsedTemplateArgument DefaultArg);
6095
6096 TemplateParameterList *
6097 ActOnTemplateParameterList(unsigned Depth,
6098 SourceLocation ExportLoc,
6099 SourceLocation TemplateLoc,
6100 SourceLocation LAngleLoc,
6101 ArrayRef<NamedDecl *> Params,
6102 SourceLocation RAngleLoc,
6103 Expr *RequiresClause);
6104
6105 /// \brief The context in which we are checking a template parameter list.
6106 enum TemplateParamListContext {
6107 TPC_ClassTemplate,
6108 TPC_VarTemplate,
6109 TPC_FunctionTemplate,
6110 TPC_ClassTemplateMember,
6111 TPC_FriendClassTemplate,
6112 TPC_FriendFunctionTemplate,
6113 TPC_FriendFunctionTemplateDefinition,
6114 TPC_TypeAliasTemplate
6115 };
6116
6117 bool CheckTemplateParameterList(TemplateParameterList *NewParams,
6118 TemplateParameterList *OldParams,
6119 TemplateParamListContext TPC);
6120 TemplateParameterList *MatchTemplateParametersToScopeSpecifier(
6121 SourceLocation DeclStartLoc, SourceLocation DeclLoc,
6122 const CXXScopeSpec &SS, TemplateIdAnnotation *TemplateId,
6123 ArrayRef<TemplateParameterList *> ParamLists,
6124 bool IsFriend, bool &IsMemberSpecialization, bool &Invalid);
6125
6126 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK,
6127 SourceLocation KWLoc, CXXScopeSpec &SS,
6128 IdentifierInfo *Name, SourceLocation NameLoc,
6129 AttributeList *Attr,
6130 TemplateParameterList *TemplateParams,
6131 AccessSpecifier AS,
6132 SourceLocation ModulePrivateLoc,
6133 SourceLocation FriendLoc,
6134 unsigned NumOuterTemplateParamLists,
6135 TemplateParameterList **OuterTemplateParamLists,
6136 SkipBodyInfo *SkipBody = nullptr);
6137
6138 TemplateArgumentLoc getTrivialTemplateArgumentLoc(const TemplateArgument &Arg,
6139 QualType NTTPType,
6140 SourceLocation Loc);
6141
6142 void translateTemplateArguments(const ASTTemplateArgsPtr &In,
6143 TemplateArgumentListInfo &Out);
6144
6145 void NoteAllFoundTemplates(TemplateName Name);
6146
6147 QualType CheckTemplateIdType(TemplateName Template,
6148 SourceLocation TemplateLoc,
6149 TemplateArgumentListInfo &TemplateArgs);
6150
6151 TypeResult
6152 ActOnTemplateIdType(CXXScopeSpec &SS, SourceLocation TemplateKWLoc,
6153 TemplateTy Template, IdentifierInfo *TemplateII,
6154 SourceLocation TemplateIILoc,
6155 SourceLocation LAngleLoc,
6156 ASTTemplateArgsPtr TemplateArgs,
6157 SourceLocation RAngleLoc,
6158 bool IsCtorOrDtorName = false,
6159 bool IsClassName = false);
6160
6161 /// \brief Parsed an elaborated-type-specifier that refers to a template-id,
6162 /// such as \c class T::template apply<U>.
6163 TypeResult ActOnTagTemplateIdType(TagUseKind TUK,
6164 TypeSpecifierType TagSpec,
6165 SourceLocation TagLoc,
6166 CXXScopeSpec &SS,
6167 SourceLocation TemplateKWLoc,
6168 TemplateTy TemplateD,
6169 SourceLocation TemplateLoc,
6170 SourceLocation LAngleLoc,
6171 ASTTemplateArgsPtr TemplateArgsIn,
6172 SourceLocation RAngleLoc);
6173
6174 DeclResult ActOnVarTemplateSpecialization(
6175 Scope *S, Declarator &D, TypeSourceInfo *DI,
6176 SourceLocation TemplateKWLoc, TemplateParameterList *TemplateParams,
6177 StorageClass SC, bool IsPartialSpecialization);
6178
6179 DeclResult CheckVarTemplateId(VarTemplateDecl *Template,
6180 SourceLocation TemplateLoc,
6181 SourceLocation TemplateNameLoc,
6182 const TemplateArgumentListInfo &TemplateArgs);
6183
6184 ExprResult CheckVarTemplateId(const CXXScopeSpec &SS,
6185 const DeclarationNameInfo &NameInfo,
6186 VarTemplateDecl *Template,
6187 SourceLocation TemplateLoc,
6188 const TemplateArgumentListInfo *TemplateArgs);
6189
6190 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS,
6191 SourceLocation TemplateKWLoc,
6192 LookupResult &R,
6193 bool RequiresADL,
6194 const TemplateArgumentListInfo *TemplateArgs);
6195
6196 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS,
6197 SourceLocation TemplateKWLoc,
6198 const DeclarationNameInfo &NameInfo,
6199 const TemplateArgumentListInfo *TemplateArgs);
6200
6201 TemplateNameKind ActOnDependentTemplateName(
6202 Scope *S, CXXScopeSpec &SS, SourceLocation TemplateKWLoc,
6203 UnqualifiedId &Name, ParsedType ObjectType, bool EnteringContext,
6204 TemplateTy &Template, bool AllowInjectedClassName = false);
6205
6206 DeclResult
6207 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK,
6208 SourceLocation KWLoc,
6209 SourceLocation ModulePrivateLoc,
6210 TemplateIdAnnotation &TemplateId,
6211 AttributeList *Attr,
6212 MultiTemplateParamsArg TemplateParameterLists,
6213 SkipBodyInfo *SkipBody = nullptr);
6214
6215 bool CheckTemplatePartialSpecializationArgs(SourceLocation Loc,
6216 TemplateDecl *PrimaryTemplate,
6217 unsigned NumExplicitArgs,
6218 ArrayRef<TemplateArgument> Args);
6219 void CheckTemplatePartialSpecialization(
6220 ClassTemplatePartialSpecializationDecl *Partial);
6221 void CheckTemplatePartialSpecialization(
6222 VarTemplatePartialSpecializationDecl *Partial);
6223
6224 Decl *ActOnTemplateDeclarator(Scope *S,
6225 MultiTemplateParamsArg TemplateParameterLists,
6226 Declarator &D);
6227
6228 bool
6229 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc,
6230 TemplateSpecializationKind NewTSK,
6231 NamedDecl *PrevDecl,
6232 TemplateSpecializationKind PrevTSK,
6233 SourceLocation PrevPtOfInstantiation,
6234 bool &SuppressNew);
6235
6236 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD,
6237 const TemplateArgumentListInfo &ExplicitTemplateArgs,
6238 LookupResult &Previous);
6239
6240 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD,
6241 TemplateArgumentListInfo *ExplicitTemplateArgs,
6242 LookupResult &Previous);
6243 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous);
6244 void CompleteMemberSpecialization(NamedDecl *Member, LookupResult &Previous);
6245
6246 DeclResult
6247 ActOnExplicitInstantiation(Scope *S,
6248 SourceLocation ExternLoc,
6249 SourceLocation TemplateLoc,
6250 unsigned TagSpec,
6251 SourceLocation KWLoc,
6252 const CXXScopeSpec &SS,
6253 TemplateTy Template,
6254 SourceLocation TemplateNameLoc,
6255 SourceLocation LAngleLoc,
6256 ASTTemplateArgsPtr TemplateArgs,
6257 SourceLocation RAngleLoc,
6258 AttributeList *Attr);
6259
6260 DeclResult
6261 ActOnExplicitInstantiation(Scope *S,
6262 SourceLocation ExternLoc,
6263 SourceLocation TemplateLoc,
6264 unsigned TagSpec,
6265 SourceLocation KWLoc,
6266 CXXScopeSpec &SS,
6267 IdentifierInfo *Name,
6268 SourceLocation NameLoc,
6269 AttributeList *Attr);
6270
6271 DeclResult ActOnExplicitInstantiation(Scope *S,
6272 SourceLocation ExternLoc,
6273 SourceLocation TemplateLoc,
6274 Declarator &D);
6275
6276 TemplateArgumentLoc
6277 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template,
6278 SourceLocation TemplateLoc,
6279 SourceLocation RAngleLoc,
6280 Decl *Param,
6281 SmallVectorImpl<TemplateArgument>
6282 &Converted,
6283 bool &HasDefaultArg);
6284
6285 /// \brief Specifies the context in which a particular template
6286 /// argument is being checked.
6287 enum CheckTemplateArgumentKind {
6288 /// \brief The template argument was specified in the code or was
6289 /// instantiated with some deduced template arguments.
6290 CTAK_Specified,
6291
6292 /// \brief The template argument was deduced via template argument
6293 /// deduction.
6294 CTAK_Deduced,
6295
6296 /// \brief The template argument was deduced from an array bound
6297 /// via template argument deduction.
6298 CTAK_DeducedFromArrayBound
6299 };
6300
6301 bool CheckTemplateArgument(NamedDecl *Param,
6302 TemplateArgumentLoc &Arg,
6303 NamedDecl *Template,
6304 SourceLocation TemplateLoc,
6305 SourceLocation RAngleLoc,
6306 unsigned ArgumentPackIndex,
6307 SmallVectorImpl<TemplateArgument> &Converted,
6308 CheckTemplateArgumentKind CTAK = CTAK_Specified);
6309
6310 /// \brief Check that the given template arguments can be be provided to
6311 /// the given template, converting the arguments along the way.
6312 ///
6313 /// \param Template The template to which the template arguments are being
6314 /// provided.
6315 ///
6316 /// \param TemplateLoc The location of the template name in the source.
6317 ///
6318 /// \param TemplateArgs The list of template arguments. If the template is
6319 /// a template template parameter, this function may extend the set of
6320 /// template arguments to also include substituted, defaulted template
6321 /// arguments.
6322 ///
6323 /// \param PartialTemplateArgs True if the list of template arguments is
6324 /// intentionally partial, e.g., because we're checking just the initial
6325 /// set of template arguments.
6326 ///
6327 /// \param Converted Will receive the converted, canonicalized template
6328 /// arguments.
6329 ///
6330 /// \param UpdateArgsWithConversions If \c true, update \p TemplateArgs to
6331 /// contain the converted forms of the template arguments as written.
6332 /// Otherwise, \p TemplateArgs will not be modified.
6333 ///
6334 /// \returns true if an error occurred, false otherwise.
6335 bool CheckTemplateArgumentList(TemplateDecl *Template,
6336 SourceLocation TemplateLoc,
6337 TemplateArgumentListInfo &TemplateArgs,
6338 bool PartialTemplateArgs,
6339 SmallVectorImpl<TemplateArgument> &Converted,
6340 bool UpdateArgsWithConversions = true);
6341
6342 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param,
6343 TemplateArgumentLoc &Arg,
6344 SmallVectorImpl<TemplateArgument> &Converted);
6345
6346 bool CheckTemplateArgument(TemplateTypeParmDecl *Param,
6347 TypeSourceInfo *Arg);
6348 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param,
6349 QualType InstantiatedParamType, Expr *Arg,
6350 TemplateArgument &Converted,
6351 CheckTemplateArgumentKind CTAK = CTAK_Specified);
6352 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param,
6353 TemplateArgumentLoc &Arg,
6354 unsigned ArgumentPackIndex);
6355
6356 ExprResult
6357 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg,
6358 QualType ParamType,
6359 SourceLocation Loc);
6360 ExprResult
6361 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg,
6362 SourceLocation Loc);
6363
6364 /// \brief Enumeration describing how template parameter lists are compared
6365 /// for equality.
6366 enum TemplateParameterListEqualKind {
6367 /// \brief We are matching the template parameter lists of two templates
6368 /// that might be redeclarations.
6369 ///
6370 /// \code
6371 /// template<typename T> struct X;
6372 /// template<typename T> struct X;
6373 /// \endcode
6374 TPL_TemplateMatch,
6375
6376 /// \brief We are matching the template parameter lists of two template
6377 /// template parameters as part of matching the template parameter lists
6378 /// of two templates that might be redeclarations.
6379 ///
6380 /// \code
6381 /// template<template<int I> class TT> struct X;
6382 /// template<template<int Value> class Other> struct X;
6383 /// \endcode
6384 TPL_TemplateTemplateParmMatch,
6385
6386 /// \brief We are matching the template parameter lists of a template
6387 /// template argument against the template parameter lists of a template
6388 /// template parameter.
6389 ///
6390 /// \code
6391 /// template<template<int Value> class Metafun> struct X;
6392 /// template<int Value> struct integer_c;
6393 /// X<integer_c> xic;
6394 /// \endcode
6395 TPL_TemplateTemplateArgumentMatch
6396 };
6397
6398 bool TemplateParameterListsAreEqual(TemplateParameterList *New,
6399 TemplateParameterList *Old,
6400 bool Complain,
6401 TemplateParameterListEqualKind Kind,
6402 SourceLocation TemplateArgLoc
6403 = SourceLocation());
6404
6405 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams);
6406
6407 /// \brief Called when the parser has parsed a C++ typename
6408 /// specifier, e.g., "typename T::type".
6409 ///
6410 /// \param S The scope in which this typename type occurs.
6411 /// \param TypenameLoc the location of the 'typename' keyword
6412 /// \param SS the nested-name-specifier following the typename (e.g., 'T::').
6413 /// \param II the identifier we're retrieving (e.g., 'type' in the example).
6414 /// \param IdLoc the location of the identifier.
6415 TypeResult
6416 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc,
6417 const CXXScopeSpec &SS, const IdentifierInfo &II,
6418 SourceLocation IdLoc);
6419
6420 /// \brief Called when the parser has parsed a C++ typename
6421 /// specifier that ends in a template-id, e.g.,
6422 /// "typename MetaFun::template apply<T1, T2>".
6423 ///
6424 /// \param S The scope in which this typename type occurs.
6425 /// \param TypenameLoc the location of the 'typename' keyword
6426 /// \param SS the nested-name-specifier following the typename (e.g., 'T::').
6427 /// \param TemplateLoc the location of the 'template' keyword, if any.
6428 /// \param TemplateName The template name.
6429 /// \param TemplateII The identifier used to name the template.
6430 /// \param TemplateIILoc The location of the template name.
6431 /// \param LAngleLoc The location of the opening angle bracket ('<').
6432 /// \param TemplateArgs The template arguments.
6433 /// \param RAngleLoc The location of the closing angle bracket ('>').
6434 TypeResult
6435 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc,
6436 const CXXScopeSpec &SS,
6437 SourceLocation TemplateLoc,
6438 TemplateTy TemplateName,
6439 IdentifierInfo *TemplateII,
6440 SourceLocation TemplateIILoc,
6441 SourceLocation LAngleLoc,
6442 ASTTemplateArgsPtr TemplateArgs,
6443 SourceLocation RAngleLoc);
6444
6445 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword,
6446 SourceLocation KeywordLoc,
6447 NestedNameSpecifierLoc QualifierLoc,
6448 const IdentifierInfo &II,
6449 SourceLocation IILoc);
6450
6451 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T,
6452 SourceLocation Loc,
6453 DeclarationName Name);
6454 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS);
6455
6456 ExprResult RebuildExprInCurrentInstantiation(Expr *E);
6457 bool RebuildTemplateParamsInCurrentInstantiation(
6458 TemplateParameterList *Params);
6459
6460 std::string
6461 getTemplateArgumentBindingsText(const TemplateParameterList *Params,
6462 const TemplateArgumentList &Args);
6463
6464 std::string
6465 getTemplateArgumentBindingsText(const TemplateParameterList *Params,
6466 const TemplateArgument *Args,
6467 unsigned NumArgs);
6468
6469 //===--------------------------------------------------------------------===//
6470 // C++ Variadic Templates (C++0x [temp.variadic])
6471 //===--------------------------------------------------------------------===//
6472
6473 /// Determine whether an unexpanded parameter pack might be permitted in this
6474 /// location. Useful for error recovery.
6475 bool isUnexpandedParameterPackPermitted();
6476
6477 /// \brief The context in which an unexpanded parameter pack is
6478 /// being diagnosed.
6479 ///
6480 /// Note that the values of this enumeration line up with the first
6481 /// argument to the \c err_unexpanded_parameter_pack diagnostic.
6482 enum UnexpandedParameterPackContext {
6483 /// \brief An arbitrary expression.
6484 UPPC_Expression = 0,
6485
6486 /// \brief The base type of a class type.
6487 UPPC_BaseType,
6488
6489 /// \brief The type of an arbitrary declaration.
6490 UPPC_DeclarationType,
6491
6492 /// \brief The type of a data member.
6493 UPPC_DataMemberType,
6494
6495 /// \brief The size of a bit-field.
6496 UPPC_BitFieldWidth,
6497
6498 /// \brief The expression in a static assertion.
6499 UPPC_StaticAssertExpression,
6500
6501 /// \brief The fixed underlying type of an enumeration.
6502 UPPC_FixedUnderlyingType,
6503
6504 /// \brief The enumerator value.
6505 UPPC_EnumeratorValue,
6506
6507 /// \brief A using declaration.
6508 UPPC_UsingDeclaration,
6509
6510 /// \brief A friend declaration.
6511 UPPC_FriendDeclaration,
6512
6513 /// \brief A declaration qualifier.
6514 UPPC_DeclarationQualifier,
6515
6516 /// \brief An initializer.
6517 UPPC_Initializer,
6518
6519 /// \brief A default argument.
6520 UPPC_DefaultArgument,
6521
6522 /// \brief The type of a non-type template parameter.
6523 UPPC_NonTypeTemplateParameterType,
6524
6525 /// \brief The type of an exception.
6526 UPPC_ExceptionType,
6527
6528 /// \brief Partial specialization.
6529 UPPC_PartialSpecialization,
6530
6531 /// \brief Microsoft __if_exists.
6532 UPPC_IfExists,
6533
6534 /// \brief Microsoft __if_not_exists.
6535 UPPC_IfNotExists,
6536
6537 /// \brief Lambda expression.
6538 UPPC_Lambda,
6539
6540 /// \brief Block expression,
6541 UPPC_Block
6542 };
6543
6544 /// \brief Diagnose unexpanded parameter packs.
6545 ///
6546 /// \param Loc The location at which we should emit the diagnostic.
6547 ///
6548 /// \param UPPC The context in which we are diagnosing unexpanded
6549 /// parameter packs.
6550 ///
6551 /// \param Unexpanded the set of unexpanded parameter packs.
6552 ///
6553 /// \returns true if an error occurred, false otherwise.
6554 bool DiagnoseUnexpandedParameterPacks(SourceLocation Loc,
6555 UnexpandedParameterPackContext UPPC,
6556 ArrayRef<UnexpandedParameterPack> Unexpanded);
6557
6558 /// \brief If the given type contains an unexpanded parameter pack,
6559 /// diagnose the error.
6560 ///
6561 /// \param Loc The source location where a diagnostc should be emitted.
6562 ///
6563 /// \param T The type that is being checked for unexpanded parameter
6564 /// packs.
6565 ///
6566 /// \returns true if an error occurred, false otherwise.
6567 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T,
6568 UnexpandedParameterPackContext UPPC);
6569
6570 /// \brief If the given expression contains an unexpanded parameter
6571 /// pack, diagnose the error.
6572 ///
6573 /// \param E The expression that is being checked for unexpanded
6574 /// parameter packs.
6575 ///
6576 /// \returns true if an error occurred, false otherwise.
6577 bool DiagnoseUnexpandedParameterPack(Expr *E,
6578 UnexpandedParameterPackContext UPPC = UPPC_Expression);
6579
6580 /// \brief If the given nested-name-specifier contains an unexpanded
6581 /// parameter pack, diagnose the error.
6582 ///
6583 /// \param SS The nested-name-specifier that is being checked for
6584 /// unexpanded parameter packs.
6585 ///
6586 /// \returns true if an error occurred, false otherwise.
6587 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS,
6588 UnexpandedParameterPackContext UPPC);
6589
6590 /// \brief If the given name contains an unexpanded parameter pack,
6591 /// diagnose the error.
6592 ///
6593 /// \param NameInfo The name (with source location information) that
6594 /// is being checked for unexpanded parameter packs.
6595 ///
6596 /// \returns true if an error occurred, false otherwise.
6597 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo,
6598 UnexpandedParameterPackContext UPPC);
6599
6600 /// \brief If the given template name contains an unexpanded parameter pack,
6601 /// diagnose the error.
6602 ///
6603 /// \param Loc The location of the template name.
6604 ///
6605 /// \param Template The template name that is being checked for unexpanded
6606 /// parameter packs.
6607 ///
6608 /// \returns true if an error occurred, false otherwise.
6609 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc,
6610 TemplateName Template,
6611 UnexpandedParameterPackContext UPPC);
6612
6613 /// \brief If the given template argument contains an unexpanded parameter
6614 /// pack, diagnose the error.
6615 ///
6616 /// \param Arg The template argument that is being checked for unexpanded
6617 /// parameter packs.
6618 ///
6619 /// \returns true if an error occurred, false otherwise.
6620 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg,
6621 UnexpandedParameterPackContext UPPC);
6622
6623 /// \brief Collect the set of unexpanded parameter packs within the given
6624 /// template argument.
6625 ///
6626 /// \param Arg The template argument that will be traversed to find
6627 /// unexpanded parameter packs.
6628 void collectUnexpandedParameterPacks(TemplateArgument Arg,
6629 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
6630
6631 /// \brief Collect the set of unexpanded parameter packs within the given
6632 /// template argument.
6633 ///
6634 /// \param Arg The template argument that will be traversed to find
6635 /// unexpanded parameter packs.
6636 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg,
6637 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
6638
6639 /// \brief Collect the set of unexpanded parameter packs within the given
6640 /// type.
6641 ///
6642 /// \param T The type that will be traversed to find
6643 /// unexpanded parameter packs.
6644 void collectUnexpandedParameterPacks(QualType T,
6645 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
6646
6647 /// \brief Collect the set of unexpanded parameter packs within the given
6648 /// type.
6649 ///
6650 /// \param TL The type that will be traversed to find
6651 /// unexpanded parameter packs.
6652 void collectUnexpandedParameterPacks(TypeLoc TL,
6653 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
6654
6655 /// \brief Collect the set of unexpanded parameter packs within the given
6656 /// nested-name-specifier.
6657 ///
6658 /// \param NNS The nested-name-specifier that will be traversed to find
6659 /// unexpanded parameter packs.
6660 void collectUnexpandedParameterPacks(NestedNameSpecifierLoc NNS,
6661 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
6662
6663 /// \brief Collect the set of unexpanded parameter packs within the given
6664 /// name.
6665 ///
6666 /// \param NameInfo The name that will be traversed to find
6667 /// unexpanded parameter packs.
6668 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo,
6669 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded);
6670
6671 /// \brief Invoked when parsing a template argument followed by an
6672 /// ellipsis, which creates a pack expansion.
6673 ///
6674 /// \param Arg The template argument preceding the ellipsis, which
6675 /// may already be invalid.
6676 ///
6677 /// \param EllipsisLoc The location of the ellipsis.
6678 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg,
6679 SourceLocation EllipsisLoc);
6680
6681 /// \brief Invoked when parsing a type followed by an ellipsis, which
6682 /// creates a pack expansion.
6683 ///
6684 /// \param Type The type preceding the ellipsis, which will become
6685 /// the pattern of the pack expansion.
6686 ///
6687 /// \param EllipsisLoc The location of the ellipsis.
6688 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc);
6689
6690 /// \brief Construct a pack expansion type from the pattern of the pack
6691 /// expansion.
6692 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern,
6693 SourceLocation EllipsisLoc,
6694 Optional<unsigned> NumExpansions);
6695
6696 /// \brief Construct a pack expansion type from the pattern of the pack
6697 /// expansion.
6698 QualType CheckPackExpansion(QualType Pattern,
6699 SourceRange PatternRange,
6700 SourceLocation EllipsisLoc,
6701 Optional<unsigned> NumExpansions);
6702
6703 /// \brief Invoked when parsing an expression followed by an ellipsis, which
6704 /// creates a pack expansion.
6705 ///
6706 /// \param Pattern The expression preceding the ellipsis, which will become
6707 /// the pattern of the pack expansion.
6708 ///
6709 /// \param EllipsisLoc The location of the ellipsis.
6710 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc);
6711
6712 /// \brief Invoked when parsing an expression followed by an ellipsis, which
6713 /// creates a pack expansion.
6714 ///
6715 /// \param Pattern The expression preceding the ellipsis, which will become
6716 /// the pattern of the pack expansion.
6717 ///
6718 /// \param EllipsisLoc The location of the ellipsis.
6719 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc,
6720 Optional<unsigned> NumExpansions);
6721
6722 /// \brief Determine whether we could expand a pack expansion with the
6723 /// given set of parameter packs into separate arguments by repeatedly
6724 /// transforming the pattern.
6725 ///
6726 /// \param EllipsisLoc The location of the ellipsis that identifies the
6727 /// pack expansion.
6728 ///
6729 /// \param PatternRange The source range that covers the entire pattern of
6730 /// the pack expansion.
6731 ///
6732 /// \param Unexpanded The set of unexpanded parameter packs within the
6733 /// pattern.
6734 ///
6735 /// \param ShouldExpand Will be set to \c true if the transformer should
6736 /// expand the corresponding pack expansions into separate arguments. When
6737 /// set, \c NumExpansions must also be set.
6738 ///
6739 /// \param RetainExpansion Whether the caller should add an unexpanded
6740 /// pack expansion after all of the expanded arguments. This is used
6741 /// when extending explicitly-specified template argument packs per
6742 /// C++0x [temp.arg.explicit]p9.
6743 ///
6744 /// \param NumExpansions The number of separate arguments that will be in
6745 /// the expanded form of the corresponding pack expansion. This is both an
6746 /// input and an output parameter, which can be set by the caller if the
6747 /// number of expansions is known a priori (e.g., due to a prior substitution)
6748 /// and will be set by the callee when the number of expansions is known.
6749 /// The callee must set this value when \c ShouldExpand is \c true; it may
6750 /// set this value in other cases.
6751 ///
6752 /// \returns true if an error occurred (e.g., because the parameter packs
6753 /// are to be instantiated with arguments of different lengths), false
6754 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions)
6755 /// must be set.
6756 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc,
6757 SourceRange PatternRange,
6758 ArrayRef<UnexpandedParameterPack> Unexpanded,
6759 const MultiLevelTemplateArgumentList &TemplateArgs,
6760 bool &ShouldExpand,
6761 bool &RetainExpansion,
6762 Optional<unsigned> &NumExpansions);
6763
6764 /// \brief Determine the number of arguments in the given pack expansion
6765 /// type.
6766 ///
6767 /// This routine assumes that the number of arguments in the expansion is
6768 /// consistent across all of the unexpanded parameter packs in its pattern.
6769 ///
6770 /// Returns an empty Optional if the type can't be expanded.
6771 Optional<unsigned> getNumArgumentsInExpansion(QualType T,
6772 const MultiLevelTemplateArgumentList &TemplateArgs);
6773
6774 /// \brief Determine whether the given declarator contains any unexpanded
6775 /// parameter packs.
6776 ///
6777 /// This routine is used by the parser to disambiguate function declarators
6778 /// with an ellipsis prior to the ')', e.g.,
6779 ///
6780 /// \code
6781 /// void f(T...);
6782 /// \endcode
6783 ///
6784 /// To determine whether we have an (unnamed) function parameter pack or
6785 /// a variadic function.
6786 ///
6787 /// \returns true if the declarator contains any unexpanded parameter packs,
6788 /// false otherwise.
6789 bool containsUnexpandedParameterPacks(Declarator &D);
6790
6791 /// \brief Returns the pattern of the pack expansion for a template argument.
6792 ///
6793 /// \param OrigLoc The template argument to expand.
6794 ///
6795 /// \param Ellipsis Will be set to the location of the ellipsis.
6796 ///
6797 /// \param NumExpansions Will be set to the number of expansions that will
6798 /// be generated from this pack expansion, if known a priori.
6799 TemplateArgumentLoc getTemplateArgumentPackExpansionPattern(
6800 TemplateArgumentLoc OrigLoc,
6801 SourceLocation &Ellipsis,
6802 Optional<unsigned> &NumExpansions) const;
6803
6804 /// Given a template argument that contains an unexpanded parameter pack, but
6805 /// which has already been substituted, attempt to determine the number of
6806 /// elements that will be produced once this argument is fully-expanded.
6807 ///
6808 /// This is intended for use when transforming 'sizeof...(Arg)' in order to
6809 /// avoid actually expanding the pack where possible.
6810 Optional<unsigned> getFullyPackExpandedSize(TemplateArgument Arg);
6811
6812 //===--------------------------------------------------------------------===//
6813 // C++ Template Argument Deduction (C++ [temp.deduct])
6814 //===--------------------------------------------------------------------===//
6815
6816 /// Adjust the type \p ArgFunctionType to match the calling convention,
6817 /// noreturn, and optionally the exception specification of \p FunctionType.
6818 /// Deduction often wants to ignore these properties when matching function
6819 /// types.
6820 QualType adjustCCAndNoReturn(QualType ArgFunctionType, QualType FunctionType,
6821 bool AdjustExceptionSpec = false);
6822
6823 /// \brief Describes the result of template argument deduction.
6824 ///
6825 /// The TemplateDeductionResult enumeration describes the result of
6826 /// template argument deduction, as returned from
6827 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo
6828 /// structure provides additional information about the results of
6829 /// template argument deduction, e.g., the deduced template argument
6830 /// list (if successful) or the specific template parameters or
6831 /// deduced arguments that were involved in the failure.
6832 enum TemplateDeductionResult {
6833 /// \brief Template argument deduction was successful.
6834 TDK_Success = 0,
6835 /// \brief The declaration was invalid; do nothing.
6836 TDK_Invalid,
6837 /// \brief Template argument deduction exceeded the maximum template
6838 /// instantiation depth (which has already been diagnosed).
6839 TDK_InstantiationDepth,
6840 /// \brief Template argument deduction did not deduce a value
6841 /// for every template parameter.
6842 TDK_Incomplete,
6843 /// \brief Template argument deduction produced inconsistent
6844 /// deduced values for the given template parameter.
6845 TDK_Inconsistent,
6846 /// \brief Template argument deduction failed due to inconsistent
6847 /// cv-qualifiers on a template parameter type that would
6848 /// otherwise be deduced, e.g., we tried to deduce T in "const T"
6849 /// but were given a non-const "X".
6850 TDK_Underqualified,
6851 /// \brief Substitution of the deduced template argument values
6852 /// resulted in an error.
6853 TDK_SubstitutionFailure,
6854 /// \brief After substituting deduced template arguments, a dependent
6855 /// parameter type did not match the corresponding argument.
6856 TDK_DeducedMismatch,
6857 /// \brief After substituting deduced template arguments, an element of
6858 /// a dependent parameter type did not match the corresponding element
6859 /// of the corresponding argument (when deducing from an initializer list).
6860 TDK_DeducedMismatchNested,
6861 /// \brief A non-depnedent component of the parameter did not match the
6862 /// corresponding component of the argument.
6863 TDK_NonDeducedMismatch,
6864 /// \brief When performing template argument deduction for a function
6865 /// template, there were too many call arguments.
6866 TDK_TooManyArguments,
6867 /// \brief When performing template argument deduction for a function
6868 /// template, there were too few call arguments.
6869 TDK_TooFewArguments,
6870 /// \brief The explicitly-specified template arguments were not valid
6871 /// template arguments for the given template.
6872 TDK_InvalidExplicitArguments,
6873 /// \brief Checking non-dependent argument conversions failed.
6874 TDK_NonDependentConversionFailure,
6875 /// \brief Deduction failed; that's all we know.
6876 TDK_MiscellaneousDeductionFailure,
6877 /// \brief CUDA Target attributes do not match.
6878 TDK_CUDATargetMismatch
6879 };
6880
6881 TemplateDeductionResult
6882 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial,
6883 const TemplateArgumentList &TemplateArgs,
6884 sema::TemplateDeductionInfo &Info);
6885
6886 TemplateDeductionResult
6887 DeduceTemplateArguments(VarTemplatePartialSpecializationDecl *Partial,
6888 const TemplateArgumentList &TemplateArgs,
6889 sema::TemplateDeductionInfo &Info);
6890
6891 TemplateDeductionResult SubstituteExplicitTemplateArguments(
6892 FunctionTemplateDecl *FunctionTemplate,
6893 TemplateArgumentListInfo &ExplicitTemplateArgs,
6894 SmallVectorImpl<DeducedTemplateArgument> &Deduced,
6895 SmallVectorImpl<QualType> &ParamTypes, QualType *FunctionType,
6896 sema::TemplateDeductionInfo &Info);
6897
6898 /// brief A function argument from which we performed template argument
6899 // deduction for a call.
6900 struct OriginalCallArg {
6901 OriginalCallArg(QualType OriginalParamType, bool DecomposedParam,
6902 unsigned ArgIdx, QualType OriginalArgType)
6903 : OriginalParamType(OriginalParamType),
6904 DecomposedParam(DecomposedParam), ArgIdx(ArgIdx),
6905 OriginalArgType(OriginalArgType) {}
6906
6907 QualType OriginalParamType;
6908 bool DecomposedParam;
6909 unsigned ArgIdx;
6910 QualType OriginalArgType;
6911 };
6912
6913 TemplateDeductionResult FinishTemplateArgumentDeduction(
6914 FunctionTemplateDecl *FunctionTemplate,
6915 SmallVectorImpl<DeducedTemplateArgument> &Deduced,
6916 unsigned NumExplicitlySpecified, FunctionDecl *&Specialization,
6917 sema::TemplateDeductionInfo &Info,
6918 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = nullptr,
6919 bool PartialOverloading = false,
6920 llvm::function_ref<bool()> CheckNonDependent = []{ return false; });
6921
6922 TemplateDeductionResult DeduceTemplateArguments(
6923 FunctionTemplateDecl *FunctionTemplate,
6924 TemplateArgumentListInfo *ExplicitTemplateArgs, ArrayRef<Expr *> Args,
6925 FunctionDecl *&Specialization, sema::TemplateDeductionInfo &Info,
6926 bool PartialOverloading,
6927 llvm::function_ref<bool(ArrayRef<QualType>)> CheckNonDependent);
6928
6929 TemplateDeductionResult
6930 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate,
6931 TemplateArgumentListInfo *ExplicitTemplateArgs,
6932 QualType ArgFunctionType,
6933 FunctionDecl *&Specialization,
6934 sema::TemplateDeductionInfo &Info,
6935 bool IsAddressOfFunction = false);
6936
6937 TemplateDeductionResult
6938 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate,
6939 QualType ToType,
6940 CXXConversionDecl *&Specialization,
6941 sema::TemplateDeductionInfo &Info);
6942
6943 TemplateDeductionResult
6944 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate,
6945 TemplateArgumentListInfo *ExplicitTemplateArgs,
6946 FunctionDecl *&Specialization,
6947 sema::TemplateDeductionInfo &Info,
6948 bool IsAddressOfFunction = false);
6949
6950 /// \brief Substitute Replacement for \p auto in \p TypeWithAuto
6951 QualType SubstAutoType(QualType TypeWithAuto, QualType Replacement);
6952 /// \brief Substitute Replacement for auto in TypeWithAuto
6953 TypeSourceInfo* SubstAutoTypeSourceInfo(TypeSourceInfo *TypeWithAuto,
6954 QualType Replacement);
6955 /// \brief Completely replace the \c auto in \p TypeWithAuto by
6956 /// \p Replacement. This does not retain any \c auto type sugar.
6957 QualType ReplaceAutoType(QualType TypeWithAuto, QualType Replacement);
6958
6959 /// \brief Result type of DeduceAutoType.
6960 enum DeduceAutoResult {
6961 DAR_Succeeded,
6962 DAR_Failed,
6963 DAR_FailedAlreadyDiagnosed
6964 };
6965
6966 DeduceAutoResult
6967 DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer, QualType &Result,
6968 Optional<unsigned> DependentDeductionDepth = None);
6969 DeduceAutoResult
6970 DeduceAutoType(TypeLoc AutoTypeLoc, Expr *&Initializer, QualType &Result,
6971 Optional<unsigned> DependentDeductionDepth = None);
6972 void DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init);
6973 bool DeduceReturnType(FunctionDecl *FD, SourceLocation Loc,
6974 bool Diagnose = true);
6975
6976 /// \brief Declare implicit deduction guides for a class template if we've
6977 /// not already done so.
6978 void DeclareImplicitDeductionGuides(TemplateDecl *Template,
6979 SourceLocation Loc);
6980
6981 QualType DeduceTemplateSpecializationFromInitializer(
6982 TypeSourceInfo *TInfo, const InitializedEntity &Entity,
6983 const InitializationKind &Kind, MultiExprArg Init);
6984
6985 QualType deduceVarTypeFromInitializer(VarDecl *VDecl, DeclarationName Name,
6986 QualType Type, TypeSourceInfo *TSI,
6987 SourceRange Range, bool DirectInit,
6988 Expr *Init);
6989
6990 TypeLoc getReturnTypeLoc(FunctionDecl *FD) const;
6991
6992 bool DeduceFunctionTypeFromReturnExpr(FunctionDecl *FD,
6993 SourceLocation ReturnLoc,
6994 Expr *&RetExpr, AutoType *AT);
6995
6996 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1,
6997 FunctionTemplateDecl *FT2,
6998 SourceLocation Loc,
6999 TemplatePartialOrderingContext TPOC,
7000 unsigned NumCallArguments1,
7001 unsigned NumCallArguments2);
7002 UnresolvedSetIterator
7003 getMostSpecialized(UnresolvedSetIterator SBegin, UnresolvedSetIterator SEnd,
7004 TemplateSpecCandidateSet &FailedCandidates,
7005 SourceLocation Loc,
7006 const PartialDiagnostic &NoneDiag,
7007 const PartialDiagnostic &AmbigDiag,
7008 const PartialDiagnostic &CandidateDiag,
7009 bool Complain = true, QualType TargetType = QualType());
7010
7011 ClassTemplatePartialSpecializationDecl *
7012 getMoreSpecializedPartialSpecialization(
7013 ClassTemplatePartialSpecializationDecl *PS1,
7014 ClassTemplatePartialSpecializationDecl *PS2,
7015 SourceLocation Loc);
7016
7017 bool isMoreSpecializedThanPrimary(ClassTemplatePartialSpecializationDecl *T,
7018 sema::TemplateDeductionInfo &Info);
7019
7020 VarTemplatePartialSpecializationDecl *getMoreSpecializedPartialSpecialization(
7021 VarTemplatePartialSpecializationDecl *PS1,
7022 VarTemplatePartialSpecializationDecl *PS2, SourceLocation Loc);
7023
7024 bool isMoreSpecializedThanPrimary(VarTemplatePartialSpecializationDecl *T,
7025 sema::TemplateDeductionInfo &Info);
7026
7027 bool isTemplateTemplateParameterAtLeastAsSpecializedAs(
7028 TemplateParameterList *P, TemplateDecl *AArg, SourceLocation Loc);
7029
7030 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs,
7031 bool OnlyDeduced,
7032 unsigned Depth,
7033 llvm::SmallBitVector &Used);
7034 void MarkDeducedTemplateParameters(
7035 const FunctionTemplateDecl *FunctionTemplate,
7036 llvm::SmallBitVector &Deduced) {
7037 return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced);
7038 }
7039 static void MarkDeducedTemplateParameters(ASTContext &Ctx,
7040 const FunctionTemplateDecl *FunctionTemplate,
7041 llvm::SmallBitVector &Deduced);
7042
7043 //===--------------------------------------------------------------------===//
7044 // C++ Template Instantiation
7045 //
7046
7047 MultiLevelTemplateArgumentList
7048 getTemplateInstantiationArgs(NamedDecl *D,
7049 const TemplateArgumentList *Innermost = nullptr,
7050 bool RelativeToPrimary = false,
7051 const FunctionDecl *Pattern = nullptr);
7052
7053 /// A context in which code is being synthesized (where a source location
7054 /// alone is not sufficient to identify the context). This covers template
7055 /// instantiation and various forms of implicitly-generated functions.
7056 struct CodeSynthesisContext {
7057 /// \brief The kind of template instantiation we are performing
7058 enum SynthesisKind {
7059 /// We are instantiating a template declaration. The entity is
7060 /// the declaration we're instantiating (e.g., a CXXRecordDecl).
7061 TemplateInstantiation,
7062
7063 /// We are instantiating a default argument for a template
7064 /// parameter. The Entity is the template parameter whose argument is
7065 /// being instantiated, the Template is the template, and the
7066 /// TemplateArgs/NumTemplateArguments provide the template arguments as
7067 /// specified.
7068 DefaultTemplateArgumentInstantiation,
7069
7070 /// We are instantiating a default argument for a function.
7071 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs
7072 /// provides the template arguments as specified.
7073 DefaultFunctionArgumentInstantiation,
7074
7075 /// We are substituting explicit template arguments provided for
7076 /// a function template. The entity is a FunctionTemplateDecl.
7077 ExplicitTemplateArgumentSubstitution,
7078
7079 /// We are substituting template argument determined as part of
7080 /// template argument deduction for either a class template
7081 /// partial specialization or a function template. The
7082 /// Entity is either a {Class|Var}TemplatePartialSpecializationDecl or
7083 /// a TemplateDecl.
7084 DeducedTemplateArgumentSubstitution,
7085
7086 /// We are substituting prior template arguments into a new
7087 /// template parameter. The template parameter itself is either a
7088 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl.
7089 PriorTemplateArgumentSubstitution,
7090
7091 /// We are checking the validity of a default template argument that
7092 /// has been used when naming a template-id.
7093 DefaultTemplateArgumentChecking,
7094
7095 /// We are instantiating the exception specification for a function
7096 /// template which was deferred until it was needed.
7097 ExceptionSpecInstantiation,
7098
7099 /// We are declaring an implicit special member function.
7100 DeclaringSpecialMember,
7101
7102 /// We are defining a synthesized function (such as a defaulted special
7103 /// member).
7104 DefiningSynthesizedFunction,
7105 } Kind;
7106
7107 /// \brief Was the enclosing context a non-instantiation SFINAE context?
7108 bool SavedInNonInstantiationSFINAEContext;
7109
7110 /// \brief The point of instantiation or synthesis within the source code.
7111 SourceLocation PointOfInstantiation;
7112
7113 /// \brief The entity that is being synthesized.
7114 Decl *Entity;
7115
7116 /// \brief The template (or partial specialization) in which we are
7117 /// performing the instantiation, for substitutions of prior template
7118 /// arguments.
7119 NamedDecl *Template;
7120
7121 /// \brief The list of template arguments we are substituting, if they
7122 /// are not part of the entity.
7123 const TemplateArgument *TemplateArgs;
7124
7125 // FIXME: Wrap this union around more members, or perhaps store the
7126 // kind-specific members in the RAII object owning the context.
7127 union {
7128 /// \brief The number of template arguments in TemplateArgs.
7129 unsigned NumTemplateArgs;
7130
7131 /// \brief The special member being declared or defined.
7132 CXXSpecialMember SpecialMember;
7133 };
7134
7135 ArrayRef<TemplateArgument> template_arguments() const {
7136 assert(Kind != DeclaringSpecialMember)(static_cast <bool> (Kind != DeclaringSpecialMember) ? void
(0) : __assert_fail ("Kind != DeclaringSpecialMember", "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 7136, __extension__ __PRETTY_FUNCTION__));
7137 return {TemplateArgs, NumTemplateArgs};
7138 }
7139
7140 /// \brief The template deduction info object associated with the
7141 /// substitution or checking of explicit or deduced template arguments.
7142 sema::TemplateDeductionInfo *DeductionInfo;
7143
7144 /// \brief The source range that covers the construct that cause
7145 /// the instantiation, e.g., the template-id that causes a class
7146 /// template instantiation.
7147 SourceRange InstantiationRange;
7148
7149 CodeSynthesisContext()
7150 : Kind(TemplateInstantiation), Entity(nullptr), Template(nullptr),
7151 TemplateArgs(nullptr), NumTemplateArgs(0), DeductionInfo(nullptr) {}
7152
7153 /// \brief Determines whether this template is an actual instantiation
7154 /// that should be counted toward the maximum instantiation depth.
7155 bool isInstantiationRecord() const;
7156 };
7157
7158 /// \brief List of active code synthesis contexts.
7159 ///
7160 /// This vector is treated as a stack. As synthesis of one entity requires
7161 /// synthesis of another, additional contexts are pushed onto the stack.
7162 SmallVector<CodeSynthesisContext, 16> CodeSynthesisContexts;
7163
7164 /// Specializations whose definitions are currently being instantiated.
7165 llvm::DenseSet<std::pair<Decl *, unsigned>> InstantiatingSpecializations;
7166
7167 /// Non-dependent types used in templates that have already been instantiated
7168 /// by some template instantiation.
7169 llvm::DenseSet<QualType> InstantiatedNonDependentTypes;
7170
7171 /// \brief Extra modules inspected when performing a lookup during a template
7172 /// instantiation. Computed lazily.
7173 SmallVector<Module*, 16> CodeSynthesisContextLookupModules;
7174
7175 /// \brief Cache of additional modules that should be used for name lookup
7176 /// within the current template instantiation. Computed lazily; use
7177 /// getLookupModules() to get a complete set.
7178 llvm::DenseSet<Module*> LookupModulesCache;
7179
7180 /// \brief Get the set of additional modules that should be checked during
7181 /// name lookup. A module and its imports become visible when instanting a
7182 /// template defined within it.
7183 llvm::DenseSet<Module*> &getLookupModules();
7184
7185 /// \brief Map from the most recent declaration of a namespace to the most
7186 /// recent visible declaration of that namespace.
7187 llvm::DenseMap<NamedDecl*, NamedDecl*> VisibleNamespaceCache;
7188
7189 /// \brief Whether we are in a SFINAE context that is not associated with
7190 /// template instantiation.
7191 ///
7192 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside
7193 /// of a template instantiation or template argument deduction.
7194 bool InNonInstantiationSFINAEContext;
7195
7196 /// \brief The number of \p CodeSynthesisContexts that are not template
7197 /// instantiations and, therefore, should not be counted as part of the
7198 /// instantiation depth.
7199 ///
7200 /// When the instantiation depth reaches the user-configurable limit
7201 /// \p LangOptions::InstantiationDepth we will abort instantiation.
7202 // FIXME: Should we have a similar limit for other forms of synthesis?
7203 unsigned NonInstantiationEntries;
7204
7205 /// \brief The depth of the context stack at the point when the most recent
7206 /// error or warning was produced.
7207 ///
7208 /// This value is used to suppress printing of redundant context stacks
7209 /// when there are multiple errors or warnings in the same instantiation.
7210 // FIXME: Does this belong in Sema? It's tough to implement it anywhere else.
7211 unsigned LastEmittedCodeSynthesisContextDepth = 0;
7212
7213 /// \brief The current index into pack expansion arguments that will be
7214 /// used for substitution of parameter packs.
7215 ///
7216 /// The pack expansion index will be -1 to indicate that parameter packs
7217 /// should be instantiated as themselves. Otherwise, the index specifies
7218 /// which argument within the parameter pack will be used for substitution.
7219 int ArgumentPackSubstitutionIndex;
7220
7221 /// \brief RAII object used to change the argument pack substitution index
7222 /// within a \c Sema object.
7223 ///
7224 /// See \c ArgumentPackSubstitutionIndex for more information.
7225 class ArgumentPackSubstitutionIndexRAII {
7226 Sema &Self;
7227 int OldSubstitutionIndex;
7228
7229 public:
7230 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex)
7231 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) {
7232 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex;
7233 }
7234
7235 ~ArgumentPackSubstitutionIndexRAII() {
7236 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex;
7237 }
7238 };
7239
7240 friend class ArgumentPackSubstitutionRAII;
7241
7242 /// \brief For each declaration that involved template argument deduction, the
7243 /// set of diagnostics that were suppressed during that template argument
7244 /// deduction.
7245 ///
7246 /// FIXME: Serialize this structure to the AST file.
7247 typedef llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> >
7248 SuppressedDiagnosticsMap;
7249 SuppressedDiagnosticsMap SuppressedDiagnostics;
7250
7251 /// \brief A stack object to be created when performing template
7252 /// instantiation.
7253 ///
7254 /// Construction of an object of type \c InstantiatingTemplate
7255 /// pushes the current instantiation onto the stack of active
7256 /// instantiations. If the size of this stack exceeds the maximum
7257 /// number of recursive template instantiations, construction
7258 /// produces an error and evaluates true.
7259 ///
7260 /// Destruction of this object will pop the named instantiation off
7261 /// the stack.
7262 struct InstantiatingTemplate {
7263 /// \brief Note that we are instantiating a class template,
7264 /// function template, variable template, alias template,
7265 /// or a member thereof.
7266 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
7267 Decl *Entity,
7268 SourceRange InstantiationRange = SourceRange());
7269
7270 struct ExceptionSpecification {};
7271 /// \brief Note that we are instantiating an exception specification
7272 /// of a function template.
7273 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
7274 FunctionDecl *Entity, ExceptionSpecification,
7275 SourceRange InstantiationRange = SourceRange());
7276
7277 /// \brief Note that we are instantiating a default argument in a
7278 /// template-id.
7279 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
7280 TemplateParameter Param, TemplateDecl *Template,
7281 ArrayRef<TemplateArgument> TemplateArgs,
7282 SourceRange InstantiationRange = SourceRange());
7283
7284 /// \brief Note that we are substituting either explicitly-specified or
7285 /// deduced template arguments during function template argument deduction.
7286 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
7287 FunctionTemplateDecl *FunctionTemplate,
7288 ArrayRef<TemplateArgument> TemplateArgs,
7289 CodeSynthesisContext::SynthesisKind Kind,
7290 sema::TemplateDeductionInfo &DeductionInfo,
7291 SourceRange InstantiationRange = SourceRange());
7292
7293 /// \brief Note that we are instantiating as part of template
7294 /// argument deduction for a class template declaration.
7295 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
7296 TemplateDecl *Template,
7297 ArrayRef<TemplateArgument> TemplateArgs,
7298 sema::TemplateDeductionInfo &DeductionInfo,
7299 SourceRange InstantiationRange = SourceRange());
7300
7301 /// \brief Note that we are instantiating as part of template
7302 /// argument deduction for a class template partial
7303 /// specialization.
7304 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
7305 ClassTemplatePartialSpecializationDecl *PartialSpec,
7306 ArrayRef<TemplateArgument> TemplateArgs,
7307 sema::TemplateDeductionInfo &DeductionInfo,
7308 SourceRange InstantiationRange = SourceRange());
7309
7310 /// \brief Note that we are instantiating as part of template
7311 /// argument deduction for a variable template partial
7312 /// specialization.
7313 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
7314 VarTemplatePartialSpecializationDecl *PartialSpec,
7315 ArrayRef<TemplateArgument> TemplateArgs,
7316 sema::TemplateDeductionInfo &DeductionInfo,
7317 SourceRange InstantiationRange = SourceRange());
7318
7319 /// \brief Note that we are instantiating a default argument for a function
7320 /// parameter.
7321 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
7322 ParmVarDecl *Param,
7323 ArrayRef<TemplateArgument> TemplateArgs,
7324 SourceRange InstantiationRange = SourceRange());
7325
7326 /// \brief Note that we are substituting prior template arguments into a
7327 /// non-type parameter.
7328 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
7329 NamedDecl *Template,
7330 NonTypeTemplateParmDecl *Param,
7331 ArrayRef<TemplateArgument> TemplateArgs,
7332 SourceRange InstantiationRange);
7333
7334 /// \brief Note that we are substituting prior template arguments into a
7335 /// template template parameter.
7336 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
7337 NamedDecl *Template,
7338 TemplateTemplateParmDecl *Param,
7339 ArrayRef<TemplateArgument> TemplateArgs,
7340 SourceRange InstantiationRange);
7341
7342 /// \brief Note that we are checking the default template argument
7343 /// against the template parameter for a given template-id.
7344 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
7345 TemplateDecl *Template,
7346 NamedDecl *Param,
7347 ArrayRef<TemplateArgument> TemplateArgs,
7348 SourceRange InstantiationRange);
7349
7350
7351 /// \brief Note that we have finished instantiating this template.
7352 void Clear();
7353
7354 ~InstantiatingTemplate() { Clear(); }
7355
7356 /// \brief Determines whether we have exceeded the maximum
7357 /// recursive template instantiations.
7358 bool isInvalid() const { return Invalid; }
7359
7360 /// \brief Determine whether we are already instantiating this
7361 /// specialization in some surrounding active instantiation.
7362 bool isAlreadyInstantiating() const { return AlreadyInstantiating; }
7363
7364 private:
7365 Sema &SemaRef;
7366 bool Invalid;
7367 bool AlreadyInstantiating;
7368 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation,
7369 SourceRange InstantiationRange);
7370
7371 InstantiatingTemplate(
7372 Sema &SemaRef, CodeSynthesisContext::SynthesisKind Kind,
7373 SourceLocation PointOfInstantiation, SourceRange InstantiationRange,
7374 Decl *Entity, NamedDecl *Template = nullptr,
7375 ArrayRef<TemplateArgument> TemplateArgs = None,
7376 sema::TemplateDeductionInfo *DeductionInfo = nullptr);
7377
7378 InstantiatingTemplate(const InstantiatingTemplate&) = delete;
7379
7380 InstantiatingTemplate&
7381 operator=(const InstantiatingTemplate&) = delete;
7382 };
7383
7384 void pushCodeSynthesisContext(CodeSynthesisContext Ctx);
7385 void popCodeSynthesisContext();
7386
7387 /// Determine whether we are currently performing template instantiation.
7388 bool inTemplateInstantiation() const {
7389 return CodeSynthesisContexts.size() > NonInstantiationEntries;
7390 }
7391
7392 void PrintContextStack() {
7393 if (!CodeSynthesisContexts.empty() &&
7394 CodeSynthesisContexts.size() != LastEmittedCodeSynthesisContextDepth) {
7395 PrintInstantiationStack();
7396 LastEmittedCodeSynthesisContextDepth = CodeSynthesisContexts.size();
7397 }
7398 if (PragmaAttributeCurrentTargetDecl)
7399 PrintPragmaAttributeInstantiationPoint();
7400 }
7401 void PrintInstantiationStack();
7402
7403 void PrintPragmaAttributeInstantiationPoint();
7404
7405 /// \brief Determines whether we are currently in a context where
7406 /// template argument substitution failures are not considered
7407 /// errors.
7408 ///
7409 /// \returns An empty \c Optional if we're not in a SFINAE context.
7410 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest
7411 /// template-deduction context object, which can be used to capture
7412 /// diagnostics that will be suppressed.
7413 Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const;
7414
7415 /// \brief Determines whether we are currently in a context that
7416 /// is not evaluated as per C++ [expr] p5.
7417 bool isUnevaluatedContext() const {
7418 assert(!ExprEvalContexts.empty() &&(static_cast <bool> (!ExprEvalContexts.empty() &&
"Must be in an expression evaluation context") ? void (0) : __assert_fail
("!ExprEvalContexts.empty() && \"Must be in an expression evaluation context\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 7419, __extension__ __PRETTY_FUNCTION__))
7419 "Must be in an expression evaluation context")(static_cast <bool> (!ExprEvalContexts.empty() &&
"Must be in an expression evaluation context") ? void (0) : __assert_fail
("!ExprEvalContexts.empty() && \"Must be in an expression evaluation context\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 7419, __extension__ __PRETTY_FUNCTION__));
7420 return ExprEvalContexts.back().isUnevaluated();
7421 }
7422
7423 /// \brief RAII class used to determine whether SFINAE has
7424 /// trapped any errors that occur during template argument
7425 /// deduction.
7426 class SFINAETrap {
7427 Sema &SemaRef;
7428 unsigned PrevSFINAEErrors;
7429 bool PrevInNonInstantiationSFINAEContext;
7430 bool PrevAccessCheckingSFINAE;
7431 bool PrevLastDiagnosticIgnored;
7432
7433 public:
7434 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false)
7435 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors),
7436 PrevInNonInstantiationSFINAEContext(
7437 SemaRef.InNonInstantiationSFINAEContext),
7438 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE),
7439 PrevLastDiagnosticIgnored(
7440 SemaRef.getDiagnostics().isLastDiagnosticIgnored())
7441 {
7442 if (!SemaRef.isSFINAEContext())
7443 SemaRef.InNonInstantiationSFINAEContext = true;
7444 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE;
7445 }
7446
7447 ~SFINAETrap() {
7448 SemaRef.NumSFINAEErrors = PrevSFINAEErrors;
7449 SemaRef.InNonInstantiationSFINAEContext
7450 = PrevInNonInstantiationSFINAEContext;
7451 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE;
7452 SemaRef.getDiagnostics().setLastDiagnosticIgnored(
7453 PrevLastDiagnosticIgnored);
7454 }
7455
7456 /// \brief Determine whether any SFINAE errors have been trapped.
7457 bool hasErrorOccurred() const {
7458 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors;
7459 }
7460 };
7461
7462 /// \brief RAII class used to indicate that we are performing provisional
7463 /// semantic analysis to determine the validity of a construct, so
7464 /// typo-correction and diagnostics in the immediate context (not within
7465 /// implicitly-instantiated templates) should be suppressed.
7466 class TentativeAnalysisScope {
7467 Sema &SemaRef;
7468 // FIXME: Using a SFINAETrap for this is a hack.
7469 SFINAETrap Trap;
7470 bool PrevDisableTypoCorrection;
7471 public:
7472 explicit TentativeAnalysisScope(Sema &SemaRef)
7473 : SemaRef(SemaRef), Trap(SemaRef, true),
7474 PrevDisableTypoCorrection(SemaRef.DisableTypoCorrection) {
7475 SemaRef.DisableTypoCorrection = true;
7476 }
7477 ~TentativeAnalysisScope() {
7478 SemaRef.DisableTypoCorrection = PrevDisableTypoCorrection;
7479 }
7480 };
7481
7482 /// \brief The current instantiation scope used to store local
7483 /// variables.
7484 LocalInstantiationScope *CurrentInstantiationScope;
7485
7486 /// \brief Tracks whether we are in a context where typo correction is
7487 /// disabled.
7488 bool DisableTypoCorrection;
7489
7490 /// \brief The number of typos corrected by CorrectTypo.
7491 unsigned TyposCorrected;
7492
7493 typedef llvm::SmallSet<SourceLocation, 2> SrcLocSet;
7494 typedef llvm::DenseMap<IdentifierInfo *, SrcLocSet> IdentifierSourceLocations;
7495
7496 /// \brief A cache containing identifiers for which typo correction failed and
7497 /// their locations, so that repeated attempts to correct an identifier in a
7498 /// given location are ignored if typo correction already failed for it.
7499 IdentifierSourceLocations TypoCorrectionFailures;
7500
7501 /// \brief Worker object for performing CFG-based warnings.
7502 sema::AnalysisBasedWarnings AnalysisWarnings;
7503 threadSafety::BeforeSet *ThreadSafetyDeclCache;
7504
7505 /// \brief An entity for which implicit template instantiation is required.
7506 ///
7507 /// The source location associated with the declaration is the first place in
7508 /// the source code where the declaration was "used". It is not necessarily
7509 /// the point of instantiation (which will be either before or after the
7510 /// namespace-scope declaration that triggered this implicit instantiation),
7511 /// However, it is the location that diagnostics should generally refer to,
7512 /// because users will need to know what code triggered the instantiation.
7513 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation;
7514
7515 /// \brief The queue of implicit template instantiations that are required
7516 /// but have not yet been performed.
7517 std::deque<PendingImplicitInstantiation> PendingInstantiations;
7518
7519 class GlobalEagerInstantiationScope {
7520 public:
7521 GlobalEagerInstantiationScope(Sema &S, bool Enabled)
7522 : S(S), Enabled(Enabled) {
7523 if (!Enabled) return;
7524
7525 SavedPendingInstantiations.swap(S.PendingInstantiations);
7526 SavedVTableUses.swap(S.VTableUses);
7527 }
7528
7529 void perform() {
7530 if (Enabled) {
19
←
Assuming the condition is true
→
20
←
Taking true branch
→
7531 S.DefineUsedVTables();
7532 S.PerformPendingInstantiations();
21
←
Calling 'Sema::PerformPendingInstantiations'
→
7533 }
7534 }
7535
7536 ~GlobalEagerInstantiationScope() {
7537 if (!Enabled) return;
7538
7539 // Restore the set of pending vtables.
7540 assert(S.VTableUses.empty() &&(static_cast <bool> (S.VTableUses.empty() && "VTableUses should be empty before it is discarded."
) ? void (0) : __assert_fail ("S.VTableUses.empty() && \"VTableUses should be empty before it is discarded.\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 7541, __extension__ __PRETTY_FUNCTION__))
7541 "VTableUses should be empty before it is discarded.")(static_cast <bool> (S.VTableUses.empty() && "VTableUses should be empty before it is discarded."
) ? void (0) : __assert_fail ("S.VTableUses.empty() && \"VTableUses should be empty before it is discarded.\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 7541, __extension__ __PRETTY_FUNCTION__));
7542 S.VTableUses.swap(SavedVTableUses);
7543
7544 // Restore the set of pending implicit instantiations.
7545 assert(S.PendingInstantiations.empty() &&(static_cast <bool> (S.PendingInstantiations.empty() &&
"PendingInstantiations should be empty before it is discarded."
) ? void (0) : __assert_fail ("S.PendingInstantiations.empty() && \"PendingInstantiations should be empty before it is discarded.\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 7546, __extension__ __PRETTY_FUNCTION__))
7546 "PendingInstantiations should be empty before it is discarded.")(static_cast <bool> (S.PendingInstantiations.empty() &&
"PendingInstantiations should be empty before it is discarded."
) ? void (0) : __assert_fail ("S.PendingInstantiations.empty() && \"PendingInstantiations should be empty before it is discarded.\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 7546, __extension__ __PRETTY_FUNCTION__));
7547 S.PendingInstantiations.swap(SavedPendingInstantiations);
7548 }
7549
7550 private:
7551 Sema &S;
7552 SmallVector<VTableUse, 16> SavedVTableUses;
7553 std::deque<PendingImplicitInstantiation> SavedPendingInstantiations;
7554 bool Enabled;
7555 };
7556
7557 /// \brief The queue of implicit template instantiations that are required
7558 /// and must be performed within the current local scope.
7559 ///
7560 /// This queue is only used for member functions of local classes in
7561 /// templates, which must be instantiated in the same scope as their
7562 /// enclosing function, so that they can reference function-local
7563 /// types, static variables, enumerators, etc.
7564 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations;
7565
7566 class LocalEagerInstantiationScope {
7567 public:
7568 LocalEagerInstantiationScope(Sema &S) : S(S) {
7569 SavedPendingLocalImplicitInstantiations.swap(
7570 S.PendingLocalImplicitInstantiations);
7571 }
7572
7573 void perform() { S.PerformPendingInstantiations(/*LocalOnly=*/true); }
7574
7575 ~LocalEagerInstantiationScope() {
7576 assert(S.PendingLocalImplicitInstantiations.empty() &&(static_cast <bool> (S.PendingLocalImplicitInstantiations
.empty() && "there shouldn't be any pending local implicit instantiations"
) ? void (0) : __assert_fail ("S.PendingLocalImplicitInstantiations.empty() && \"there shouldn't be any pending local implicit instantiations\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 7577, __extension__ __PRETTY_FUNCTION__))
7577 "there shouldn't be any pending local implicit instantiations")(static_cast <bool> (S.PendingLocalImplicitInstantiations
.empty() && "there shouldn't be any pending local implicit instantiations"
) ? void (0) : __assert_fail ("S.PendingLocalImplicitInstantiations.empty() && \"there shouldn't be any pending local implicit instantiations\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 7577, __extension__ __PRETTY_FUNCTION__));
7578 SavedPendingLocalImplicitInstantiations.swap(
7579 S.PendingLocalImplicitInstantiations);
7580 }
7581
7582 private:
7583 Sema &S;
7584 std::deque<PendingImplicitInstantiation>
7585 SavedPendingLocalImplicitInstantiations;
7586 };
7587
7588 /// A helper class for building up ExtParameterInfos.
7589 class ExtParameterInfoBuilder {
7590 SmallVector<FunctionProtoType::ExtParameterInfo, 16> Infos;
7591 bool HasInteresting = false;
7592
7593 public:
7594 /// Set the ExtParameterInfo for the parameter at the given index,
7595 ///
7596 void set(unsigned index, FunctionProtoType::ExtParameterInfo info) {
7597 assert(Infos.size() <= index)(static_cast <bool> (Infos.size() <= index) ? void (
0) : __assert_fail ("Infos.size() <= index", "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 7597, __extension__ __PRETTY_FUNCTION__));
7598 Infos.resize(index);
7599 Infos.push_back(info);
7600
7601 if (!HasInteresting)
7602 HasInteresting = (info != FunctionProtoType::ExtParameterInfo());
7603 }
7604
7605 /// Return a pointer (suitable for setting in an ExtProtoInfo) to the
7606 /// ExtParameterInfo array we've built up.
7607 const FunctionProtoType::ExtParameterInfo *
7608 getPointerOrNull(unsigned numParams) {
7609 if (!HasInteresting) return nullptr;
7610 Infos.resize(numParams);
7611 return Infos.data();
7612 }
7613 };
7614
7615 void PerformPendingInstantiations(bool LocalOnly = false);
7616
7617 TypeSourceInfo *SubstType(TypeSourceInfo *T,
7618 const MultiLevelTemplateArgumentList &TemplateArgs,
7619 SourceLocation Loc, DeclarationName Entity,
7620 bool AllowDeducedTST = false);
7621
7622 QualType SubstType(QualType T,
7623 const MultiLevelTemplateArgumentList &TemplateArgs,
7624 SourceLocation Loc, DeclarationName Entity);
7625
7626 TypeSourceInfo *SubstType(TypeLoc TL,
7627 const MultiLevelTemplateArgumentList &TemplateArgs,
7628 SourceLocation Loc, DeclarationName Entity);
7629
7630 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T,
7631 const MultiLevelTemplateArgumentList &TemplateArgs,
7632 SourceLocation Loc,
7633 DeclarationName Entity,
7634 CXXRecordDecl *ThisContext,
7635 unsigned ThisTypeQuals);
7636 void SubstExceptionSpec(FunctionDecl *New, const FunctionProtoType *Proto,
7637 const MultiLevelTemplateArgumentList &Args);
7638 bool SubstExceptionSpec(SourceLocation Loc,
7639 FunctionProtoType::ExceptionSpecInfo &ESI,
7640 SmallVectorImpl<QualType> &ExceptionStorage,
7641 const MultiLevelTemplateArgumentList &Args);
7642 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D,
7643 const MultiLevelTemplateArgumentList &TemplateArgs,
7644 int indexAdjustment,
7645 Optional<unsigned> NumExpansions,
7646 bool ExpectParameterPack);
7647 bool SubstParmTypes(SourceLocation Loc, ArrayRef<ParmVarDecl *> Params,
7648 const FunctionProtoType::ExtParameterInfo *ExtParamInfos,
7649 const MultiLevelTemplateArgumentList &TemplateArgs,
7650 SmallVectorImpl<QualType> &ParamTypes,
7651 SmallVectorImpl<ParmVarDecl *> *OutParams,
7652 ExtParameterInfoBuilder &ParamInfos);
7653 ExprResult SubstExpr(Expr *E,
7654 const MultiLevelTemplateArgumentList &TemplateArgs);
7655
7656 /// \brief Substitute the given template arguments into a list of
7657 /// expressions, expanding pack expansions if required.
7658 ///
7659 /// \param Exprs The list of expressions to substitute into.
7660 ///
7661 /// \param IsCall Whether this is some form of call, in which case
7662 /// default arguments will be dropped.
7663 ///
7664 /// \param TemplateArgs The set of template arguments to substitute.
7665 ///
7666 /// \param Outputs Will receive all of the substituted arguments.
7667 ///
7668 /// \returns true if an error occurred, false otherwise.
7669 bool SubstExprs(ArrayRef<Expr *> Exprs, bool IsCall,
7670 const MultiLevelTemplateArgumentList &TemplateArgs,
7671 SmallVectorImpl<Expr *> &Outputs);
7672
7673 StmtResult SubstStmt(Stmt *S,
7674 const MultiLevelTemplateArgumentList &TemplateArgs);
7675
7676 Decl *SubstDecl(Decl *D, DeclContext *Owner,
7677 const MultiLevelTemplateArgumentList &TemplateArgs);
7678
7679 ExprResult SubstInitializer(Expr *E,
7680 const MultiLevelTemplateArgumentList &TemplateArgs,
7681 bool CXXDirectInit);
7682
7683 bool
7684 SubstBaseSpecifiers(CXXRecordDecl *Instantiation,
7685 CXXRecordDecl *Pattern,
7686 const MultiLevelTemplateArgumentList &TemplateArgs);
7687
7688 bool
7689 InstantiateClass(SourceLocation PointOfInstantiation,
7690 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern,
7691 const MultiLevelTemplateArgumentList &TemplateArgs,
7692 TemplateSpecializationKind TSK,
7693 bool Complain = true);
7694
7695 bool InstantiateEnum(SourceLocation PointOfInstantiation,
7696 EnumDecl *Instantiation, EnumDecl *Pattern,
7697 const MultiLevelTemplateArgumentList &TemplateArgs,
7698 TemplateSpecializationKind TSK);
7699
7700 bool InstantiateInClassInitializer(
7701 SourceLocation PointOfInstantiation, FieldDecl *Instantiation,
7702 FieldDecl *Pattern, const MultiLevelTemplateArgumentList &TemplateArgs);
7703
7704 struct LateInstantiatedAttribute {
7705 const Attr *TmplAttr;
7706 LocalInstantiationScope *Scope;
7707 Decl *NewDecl;
7708
7709 LateInstantiatedAttribute(const Attr *A, LocalInstantiationScope *S,
7710 Decl *D)
7711 : TmplAttr(A), Scope(S), NewDecl(D)
7712 { }
7713 };
7714 typedef SmallVector<LateInstantiatedAttribute, 16> LateInstantiatedAttrVec;
7715
7716 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs,
7717 const Decl *Pattern, Decl *Inst,
7718 LateInstantiatedAttrVec *LateAttrs = nullptr,
7719 LocalInstantiationScope *OuterMostScope = nullptr);
7720
7721 void
7722 InstantiateAttrsForDecl(const MultiLevelTemplateArgumentList &TemplateArgs,
7723 const Decl *Pattern, Decl *Inst,
7724 LateInstantiatedAttrVec *LateAttrs = nullptr,
7725 LocalInstantiationScope *OuterMostScope = nullptr);
7726
7727 bool usesPartialOrExplicitSpecialization(
7728 SourceLocation Loc, ClassTemplateSpecializationDecl *ClassTemplateSpec);
7729
7730 bool
7731 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation,
7732 ClassTemplateSpecializationDecl *ClassTemplateSpec,
7733 TemplateSpecializationKind TSK,
7734 bool Complain = true);
7735
7736 void InstantiateClassMembers(SourceLocation PointOfInstantiation,
7737 CXXRecordDecl *Instantiation,
7738 const MultiLevelTemplateArgumentList &TemplateArgs,
7739 TemplateSpecializationKind TSK);
7740
7741 void InstantiateClassTemplateSpecializationMembers(
7742 SourceLocation PointOfInstantiation,
7743 ClassTemplateSpecializationDecl *ClassTemplateSpec,
7744 TemplateSpecializationKind TSK);
7745
7746 NestedNameSpecifierLoc
7747 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS,
7748 const MultiLevelTemplateArgumentList &TemplateArgs);
7749
7750 DeclarationNameInfo
7751 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo,
7752 const MultiLevelTemplateArgumentList &TemplateArgs);
7753 TemplateName
7754 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name,
7755 SourceLocation Loc,
7756 const MultiLevelTemplateArgumentList &TemplateArgs);
7757 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs,
7758 TemplateArgumentListInfo &Result,
7759 const MultiLevelTemplateArgumentList &TemplateArgs);
7760
7761 void InstantiateExceptionSpec(SourceLocation PointOfInstantiation,
7762 FunctionDecl *Function);
7763 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation,
7764 FunctionDecl *Function,
7765 bool Recursive = false,
7766 bool DefinitionRequired = false,
7767 bool AtEndOfTU = false);
7768 VarTemplateSpecializationDecl *BuildVarTemplateInstantiation(
7769 VarTemplateDecl *VarTemplate, VarDecl *FromVar,
7770 const TemplateArgumentList &TemplateArgList,
7771 const TemplateArgumentListInfo &TemplateArgsInfo,
7772 SmallVectorImpl<TemplateArgument> &Converted,
7773 SourceLocation PointOfInstantiation, void *InsertPos,
7774 LateInstantiatedAttrVec *LateAttrs = nullptr,
7775 LocalInstantiationScope *StartingScope = nullptr);
7776 VarTemplateSpecializationDecl *CompleteVarTemplateSpecializationDecl(
7777 VarTemplateSpecializationDecl *VarSpec, VarDecl *PatternDecl,
7778 const MultiLevelTemplateArgumentList &TemplateArgs);
7779 void
7780 BuildVariableInstantiation(VarDecl *NewVar, VarDecl *OldVar,
7781 const MultiLevelTemplateArgumentList &TemplateArgs,
7782 LateInstantiatedAttrVec *LateAttrs,
7783 DeclContext *Owner,
7784 LocalInstantiationScope *StartingScope,
7785 bool InstantiatingVarTemplate = false);
7786 void InstantiateVariableInitializer(
7787 VarDecl *Var, VarDecl *OldVar,
7788 const MultiLevelTemplateArgumentList &TemplateArgs);
7789 void InstantiateVariableDefinition(SourceLocation PointOfInstantiation,
7790 VarDecl *Var, bool Recursive = false,
7791 bool DefinitionRequired = false,
7792 bool AtEndOfTU = false);
7793 void InstantiateStaticDataMemberDefinition(
7794 SourceLocation PointOfInstantiation,
7795 VarDecl *Var,
7796 bool Recursive = false,
7797 bool DefinitionRequired = false);
7798
7799 void InstantiateMemInitializers(CXXConstructorDecl *New,
7800 const CXXConstructorDecl *Tmpl,
7801 const MultiLevelTemplateArgumentList &TemplateArgs);
7802
7803 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D,
7804 const MultiLevelTemplateArgumentList &TemplateArgs,
7805 bool FindingInstantiatedContext = false);
7806 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC,
7807 const MultiLevelTemplateArgumentList &TemplateArgs);
7808
7809 // Objective-C declarations.
7810 enum ObjCContainerKind {
7811 OCK_None = -1,
7812 OCK_Interface = 0,
7813 OCK_Protocol,
7814 OCK_Category,
7815 OCK_ClassExtension,
7816 OCK_Implementation,
7817 OCK_CategoryImplementation
7818 };
7819 ObjCContainerKind getObjCContainerKind() const;
7820
7821 DeclResult actOnObjCTypeParam(Scope *S,
7822 ObjCTypeParamVariance variance,
7823 SourceLocation varianceLoc,
7824 unsigned index,
7825 IdentifierInfo *paramName,
7826 SourceLocation paramLoc,
7827 SourceLocation colonLoc,
7828 ParsedType typeBound);
7829
7830 ObjCTypeParamList *actOnObjCTypeParamList(Scope *S, SourceLocation lAngleLoc,
7831 ArrayRef<Decl *> typeParams,
7832 SourceLocation rAngleLoc);
7833 void popObjCTypeParamList(Scope *S, ObjCTypeParamList *typeParamList);
7834
7835 Decl *ActOnStartClassInterface(Scope *S,
7836 SourceLocation AtInterfaceLoc,
7837 IdentifierInfo *ClassName,
7838 SourceLocation ClassLoc,
7839 ObjCTypeParamList *typeParamList,
7840 IdentifierInfo *SuperName,
7841 SourceLocation SuperLoc,
7842 ArrayRef<ParsedType> SuperTypeArgs,
7843 SourceRange SuperTypeArgsRange,
7844 Decl * const *ProtoRefs,
7845 unsigned NumProtoRefs,
7846 const SourceLocation *ProtoLocs,
7847 SourceLocation EndProtoLoc,
7848 AttributeList *AttrList);
7849
7850 void ActOnSuperClassOfClassInterface(Scope *S,
7851 SourceLocation AtInterfaceLoc,
7852 ObjCInterfaceDecl *IDecl,
7853 IdentifierInfo *ClassName,
7854 SourceLocation ClassLoc,
7855 IdentifierInfo *SuperName,
7856 SourceLocation SuperLoc,
7857 ArrayRef<ParsedType> SuperTypeArgs,
7858 SourceRange SuperTypeArgsRange);
7859
7860 void ActOnTypedefedProtocols(SmallVectorImpl<Decl *> &ProtocolRefs,
7861 SmallVectorImpl<SourceLocation> &ProtocolLocs,
7862 IdentifierInfo *SuperName,
7863 SourceLocation SuperLoc);
7864
7865 Decl *ActOnCompatibilityAlias(
7866 SourceLocation AtCompatibilityAliasLoc,
7867 IdentifierInfo *AliasName, SourceLocation AliasLocation,
7868 IdentifierInfo *ClassName, SourceLocation ClassLocation);
7869
7870 bool CheckForwardProtocolDeclarationForCircularDependency(
7871 IdentifierInfo *PName,
7872 SourceLocation &PLoc, SourceLocation PrevLoc,
7873 const ObjCList<ObjCProtocolDecl> &PList);
7874
7875 Decl *ActOnStartProtocolInterface(
7876 SourceLocation AtProtoInterfaceLoc,
7877 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc,
7878 Decl * const *ProtoRefNames, unsigned NumProtoRefs,
7879 const SourceLocation *ProtoLocs,
7880 SourceLocation EndProtoLoc,
7881 AttributeList *AttrList);
7882
7883 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc,
7884 IdentifierInfo *ClassName,
7885 SourceLocation ClassLoc,
7886 ObjCTypeParamList *typeParamList,
7887 IdentifierInfo *CategoryName,
7888 SourceLocation CategoryLoc,
7889 Decl * const *ProtoRefs,
7890 unsigned NumProtoRefs,
7891 const SourceLocation *ProtoLocs,
7892 SourceLocation EndProtoLoc,
7893 AttributeList *AttrList);
7894
7895 Decl *ActOnStartClassImplementation(
7896 SourceLocation AtClassImplLoc,
7897 IdentifierInfo *ClassName, SourceLocation ClassLoc,
7898 IdentifierInfo *SuperClassname,
7899 SourceLocation SuperClassLoc);
7900
7901 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc,
7902 IdentifierInfo *ClassName,
7903 SourceLocation ClassLoc,
7904 IdentifierInfo *CatName,
7905 SourceLocation CatLoc);
7906
7907 DeclGroupPtrTy ActOnFinishObjCImplementation(Decl *ObjCImpDecl,
7908 ArrayRef<Decl *> Decls);
7909
7910 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc,
7911 IdentifierInfo **IdentList,
7912 SourceLocation *IdentLocs,
7913 ArrayRef<ObjCTypeParamList *> TypeParamLists,
7914 unsigned NumElts);
7915
7916 DeclGroupPtrTy ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc,
7917 ArrayRef<IdentifierLocPair> IdentList,
7918 AttributeList *attrList);
7919
7920 void FindProtocolDeclaration(bool WarnOnDeclarations, bool ForObjCContainer,
7921 ArrayRef<IdentifierLocPair> ProtocolId,
7922 SmallVectorImpl<Decl *> &Protocols);
7923
7924 void DiagnoseTypeArgsAndProtocols(IdentifierInfo *ProtocolId,
7925 SourceLocation ProtocolLoc,
7926 IdentifierInfo *TypeArgId,
7927 SourceLocation TypeArgLoc,
7928 bool SelectProtocolFirst = false);
7929
7930 /// Given a list of identifiers (and their locations), resolve the
7931 /// names to either Objective-C protocol qualifiers or type
7932 /// arguments, as appropriate.
7933 void actOnObjCTypeArgsOrProtocolQualifiers(
7934 Scope *S,
7935 ParsedType baseType,
7936 SourceLocation lAngleLoc,
7937 ArrayRef<IdentifierInfo *> identifiers,
7938 ArrayRef<SourceLocation> identifierLocs,
7939 SourceLocation rAngleLoc,
7940 SourceLocation &typeArgsLAngleLoc,
7941 SmallVectorImpl<ParsedType> &typeArgs,
7942 SourceLocation &typeArgsRAngleLoc,
7943 SourceLocation &protocolLAngleLoc,
7944 SmallVectorImpl<Decl *> &protocols,
7945 SourceLocation &protocolRAngleLoc,
7946 bool warnOnIncompleteProtocols);
7947
7948 /// Build a an Objective-C protocol-qualified 'id' type where no
7949 /// base type was specified.
7950 TypeResult actOnObjCProtocolQualifierType(
7951 SourceLocation lAngleLoc,
7952 ArrayRef<Decl *> protocols,
7953 ArrayRef<SourceLocation> protocolLocs,
7954 SourceLocation rAngleLoc);
7955
7956 /// Build a specialized and/or protocol-qualified Objective-C type.
7957 TypeResult actOnObjCTypeArgsAndProtocolQualifiers(
7958 Scope *S,
7959 SourceLocation Loc,
7960 ParsedType BaseType,
7961 SourceLocation TypeArgsLAngleLoc,
7962 ArrayRef<ParsedType> TypeArgs,
7963 SourceLocation TypeArgsRAngleLoc,
7964 SourceLocation ProtocolLAngleLoc,
7965 ArrayRef<Decl *> Protocols,
7966 ArrayRef<SourceLocation> ProtocolLocs,
7967 SourceLocation ProtocolRAngleLoc);
7968
7969 /// Build an Objective-C type parameter type.
7970 QualType BuildObjCTypeParamType(const ObjCTypeParamDecl *Decl,
7971 SourceLocation ProtocolLAngleLoc,
7972 ArrayRef<ObjCProtocolDecl *> Protocols,
7973 ArrayRef<SourceLocation> ProtocolLocs,
7974 SourceLocation ProtocolRAngleLoc,
7975 bool FailOnError = false);
7976
7977 /// Build an Objective-C object pointer type.
7978 QualType BuildObjCObjectType(QualType BaseType,
7979 SourceLocation Loc,
7980 SourceLocation TypeArgsLAngleLoc,
7981 ArrayRef<TypeSourceInfo *> TypeArgs,
7982 SourceLocation TypeArgsRAngleLoc,
7983 SourceLocation ProtocolLAngleLoc,
7984 ArrayRef<ObjCProtocolDecl *> Protocols,
7985 ArrayRef<SourceLocation> ProtocolLocs,
7986 SourceLocation ProtocolRAngleLoc,
7987 bool FailOnError = false);
7988
7989 /// Check the application of the Objective-C '__kindof' qualifier to
7990 /// the given type.
7991 bool checkObjCKindOfType(QualType &type, SourceLocation loc);
7992
7993 /// Ensure attributes are consistent with type.
7994 /// \param [in, out] Attributes The attributes to check; they will
7995 /// be modified to be consistent with \p PropertyTy.
7996 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy,
7997 SourceLocation Loc,
7998 unsigned &Attributes,
7999 bool propertyInPrimaryClass);
8000
8001 /// Process the specified property declaration and create decls for the
8002 /// setters and getters as needed.
8003 /// \param property The property declaration being processed
8004 void ProcessPropertyDecl(ObjCPropertyDecl *property);
8005
8006
8007 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property,
8008 ObjCPropertyDecl *SuperProperty,
8009 const IdentifierInfo *Name,
8010 bool OverridingProtocolProperty);
8011
8012 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT,
8013 ObjCInterfaceDecl *ID);
8014
8015 Decl *ActOnAtEnd(Scope *S, SourceRange AtEnd,
8016 ArrayRef<Decl *> allMethods = None,
8017 ArrayRef<DeclGroupPtrTy> allTUVars = None);
8018
8019 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc,
8020 SourceLocation LParenLoc,
8021 FieldDeclarator &FD, ObjCDeclSpec &ODS,
8022 Selector GetterSel, Selector SetterSel,
8023 tok::ObjCKeywordKind MethodImplKind,
8024 DeclContext *lexicalDC = nullptr);
8025
8026 Decl *ActOnPropertyImplDecl(Scope *S,
8027 SourceLocation AtLoc,
8028 SourceLocation PropertyLoc,
8029 bool ImplKind,
8030 IdentifierInfo *PropertyId,
8031 IdentifierInfo *PropertyIvar,
8032 SourceLocation PropertyIvarLoc,
8033 ObjCPropertyQueryKind QueryKind);
8034
8035 enum ObjCSpecialMethodKind {
8036 OSMK_None,
8037 OSMK_Alloc,
8038 OSMK_New,
8039 OSMK_Copy,
8040 OSMK_RetainingInit,
8041 OSMK_NonRetainingInit
8042 };
8043
8044 struct ObjCArgInfo {
8045 IdentifierInfo *Name;
8046 SourceLocation NameLoc;
8047 // The Type is null if no type was specified, and the DeclSpec is invalid
8048 // in this case.
8049 ParsedType Type;
8050 ObjCDeclSpec DeclSpec;
8051
8052 /// ArgAttrs - Attribute list for this argument.
8053 AttributeList *ArgAttrs;
8054 };
8055
8056 Decl *ActOnMethodDeclaration(
8057 Scope *S,
8058 SourceLocation BeginLoc, // location of the + or -.
8059 SourceLocation EndLoc, // location of the ; or {.
8060 tok::TokenKind MethodType,
8061 ObjCDeclSpec &ReturnQT, ParsedType ReturnType,
8062 ArrayRef<SourceLocation> SelectorLocs, Selector Sel,
8063 // optional arguments. The number of types/arguments is obtained
8064 // from the Sel.getNumArgs().
8065 ObjCArgInfo *ArgInfo,
8066 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args
8067 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind,
8068 bool isVariadic, bool MethodDefinition);
8069
8070 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel,
8071 const ObjCObjectPointerType *OPT,
8072 bool IsInstance);
8073 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty,
8074 bool IsInstance);
8075
8076 bool CheckARCMethodDecl(ObjCMethodDecl *method);
8077 bool inferObjCARCLifetime(ValueDecl *decl);
8078
8079 ExprResult
8080 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT,
8081 Expr *BaseExpr,
8082 SourceLocation OpLoc,
8083 DeclarationName MemberName,
8084 SourceLocation MemberLoc,
8085 SourceLocation SuperLoc, QualType SuperType,
8086 bool Super);
8087
8088 ExprResult
8089 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName,
8090 IdentifierInfo &propertyName,
8091 SourceLocation receiverNameLoc,
8092 SourceLocation propertyNameLoc);
8093
8094 ObjCMethodDecl *tryCaptureObjCSelf(SourceLocation Loc);
8095
8096 /// \brief Describes the kind of message expression indicated by a message
8097 /// send that starts with an identifier.
8098 enum ObjCMessageKind {
8099 /// \brief The message is sent to 'super'.
8100 ObjCSuperMessage,
8101 /// \brief The message is an instance message.
8102 ObjCInstanceMessage,
8103 /// \brief The message is a class message, and the identifier is a type
8104 /// name.
8105 ObjCClassMessage
8106 };
8107
8108 ObjCMessageKind getObjCMessageKind(Scope *S,
8109 IdentifierInfo *Name,
8110 SourceLocation NameLoc,
8111 bool IsSuper,
8112 bool HasTrailingDot,
8113 ParsedType &ReceiverType);
8114
8115 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc,
8116 Selector Sel,
8117 SourceLocation LBracLoc,
8118 ArrayRef<SourceLocation> SelectorLocs,
8119 SourceLocation RBracLoc,
8120 MultiExprArg Args);
8121
8122 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo,
8123 QualType ReceiverType,
8124 SourceLocation SuperLoc,
8125 Selector Sel,
8126 ObjCMethodDecl *Method,
8127 SourceLocation LBracLoc,
8128 ArrayRef<SourceLocation> SelectorLocs,
8129 SourceLocation RBracLoc,
8130 MultiExprArg Args,
8131 bool isImplicit = false);
8132
8133 ExprResult BuildClassMessageImplicit(QualType ReceiverType,
8134 bool isSuperReceiver,
8135 SourceLocation Loc,
8136 Selector Sel,
8137 ObjCMethodDecl *Method,
8138 MultiExprArg Args);
8139
8140 ExprResult ActOnClassMessage(Scope *S,
8141 ParsedType Receiver,
8142 Selector Sel,
8143 SourceLocation LBracLoc,
8144 ArrayRef<SourceLocation> SelectorLocs,
8145 SourceLocation RBracLoc,
8146 MultiExprArg Args);
8147
8148 ExprResult BuildInstanceMessage(Expr *Receiver,
8149 QualType ReceiverType,
8150 SourceLocation SuperLoc,
8151 Selector Sel,
8152 ObjCMethodDecl *Method,
8153 SourceLocation LBracLoc,
8154 ArrayRef<SourceLocation> SelectorLocs,
8155 SourceLocation RBracLoc,
8156 MultiExprArg Args,
8157 bool isImplicit = false);
8158
8159 ExprResult BuildInstanceMessageImplicit(Expr *Receiver,
8160 QualType ReceiverType,
8161 SourceLocation Loc,
8162 Selector Sel,
8163 ObjCMethodDecl *Method,
8164 MultiExprArg Args);
8165
8166 ExprResult ActOnInstanceMessage(Scope *S,
8167 Expr *Receiver,
8168 Selector Sel,
8169 SourceLocation LBracLoc,
8170 ArrayRef<SourceLocation> SelectorLocs,
8171 SourceLocation RBracLoc,
8172 MultiExprArg Args);
8173
8174 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc,
8175 ObjCBridgeCastKind Kind,
8176 SourceLocation BridgeKeywordLoc,
8177 TypeSourceInfo *TSInfo,
8178 Expr *SubExpr);
8179
8180 ExprResult ActOnObjCBridgedCast(Scope *S,
8181 SourceLocation LParenLoc,
8182 ObjCBridgeCastKind Kind,
8183 SourceLocation BridgeKeywordLoc,
8184 ParsedType Type,
8185 SourceLocation RParenLoc,
8186 Expr *SubExpr);
8187
8188 void CheckTollFreeBridgeCast(QualType castType, Expr *castExpr);
8189
8190 void CheckObjCBridgeRelatedCast(QualType castType, Expr *castExpr);
8191
8192 bool CheckTollFreeBridgeStaticCast(QualType castType, Expr *castExpr,
8193 CastKind &Kind);
8194
8195 bool checkObjCBridgeRelatedComponents(SourceLocation Loc,
8196 QualType DestType, QualType SrcType,
8197 ObjCInterfaceDecl *&RelatedClass,
8198 ObjCMethodDecl *&ClassMethod,
8199 ObjCMethodDecl *&InstanceMethod,
8200 TypedefNameDecl *&TDNDecl,
8201 bool CfToNs, bool Diagnose = true);
8202
8203 bool CheckObjCBridgeRelatedConversions(SourceLocation Loc,
8204 QualType DestType, QualType SrcType,
8205 Expr *&SrcExpr, bool Diagnose = true);
8206
8207 bool ConversionToObjCStringLiteralCheck(QualType DstType, Expr *&SrcExpr,
8208 bool Diagnose = true);
8209
8210 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall);
8211
8212 /// \brief Check whether the given new method is a valid override of the
8213 /// given overridden method, and set any properties that should be inherited.
8214 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod,
8215 const ObjCMethodDecl *Overridden);
8216
8217 /// \brief Describes the compatibility of a result type with its method.
8218 enum ResultTypeCompatibilityKind {
8219 RTC_Compatible,
8220 RTC_Incompatible,
8221 RTC_Unknown
8222 };
8223
8224 void CheckObjCMethodOverrides(ObjCMethodDecl *ObjCMethod,
8225 ObjCInterfaceDecl *CurrentClass,
8226 ResultTypeCompatibilityKind RTC);
8227
8228 enum PragmaOptionsAlignKind {
8229 POAK_Native, // #pragma options align=native
8230 POAK_Natural, // #pragma options align=natural
8231 POAK_Packed, // #pragma options align=packed
8232 POAK_Power, // #pragma options align=power
8233 POAK_Mac68k, // #pragma options align=mac68k
8234 POAK_Reset // #pragma options align=reset
8235 };
8236
8237 /// ActOnPragmaClangSection - Called on well formed \#pragma clang section
8238 void ActOnPragmaClangSection(SourceLocation PragmaLoc,
8239 PragmaClangSectionAction Action,
8240 PragmaClangSectionKind SecKind, StringRef SecName);
8241
8242 /// ActOnPragmaOptionsAlign - Called on well formed \#pragma options align.
8243 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind,
8244 SourceLocation PragmaLoc);
8245
8246 /// ActOnPragmaPack - Called on well formed \#pragma pack(...).
8247 void ActOnPragmaPack(SourceLocation PragmaLoc, PragmaMsStackAction Action,
8248 StringRef SlotLabel, Expr *Alignment);
8249
8250 enum class PragmaPackDiagnoseKind {
8251 NonDefaultStateAtInclude,
8252 ChangedStateAtExit
8253 };
8254
8255 void DiagnoseNonDefaultPragmaPack(PragmaPackDiagnoseKind Kind,
8256 SourceLocation IncludeLoc);
8257 void DiagnoseUnterminatedPragmaPack();
8258
8259 /// ActOnPragmaMSStruct - Called on well formed \#pragma ms_struct [on|off].
8260 void ActOnPragmaMSStruct(PragmaMSStructKind Kind);
8261
8262 /// ActOnPragmaMSComment - Called on well formed
8263 /// \#pragma comment(kind, "arg").
8264 void ActOnPragmaMSComment(SourceLocation CommentLoc, PragmaMSCommentKind Kind,
8265 StringRef Arg);
8266
8267 /// ActOnPragmaMSPointersToMembers - called on well formed \#pragma
8268 /// pointers_to_members(representation method[, general purpose
8269 /// representation]).
8270 void ActOnPragmaMSPointersToMembers(
8271 LangOptions::PragmaMSPointersToMembersKind Kind,
8272 SourceLocation PragmaLoc);
8273
8274 /// \brief Called on well formed \#pragma vtordisp().
8275 void ActOnPragmaMSVtorDisp(PragmaMsStackAction Action,
8276 SourceLocation PragmaLoc,
8277 MSVtorDispAttr::Mode Value);
8278
8279 enum PragmaSectionKind {
8280 PSK_DataSeg,
8281 PSK_BSSSeg,
8282 PSK_ConstSeg,
8283 PSK_CodeSeg,
8284 };
8285
8286 bool UnifySection(StringRef SectionName,
8287 int SectionFlags,
8288 DeclaratorDecl *TheDecl);
8289 bool UnifySection(StringRef SectionName,
8290 int SectionFlags,
8291 SourceLocation PragmaSectionLocation);
8292
8293 /// \brief Called on well formed \#pragma bss_seg/data_seg/const_seg/code_seg.
8294 void ActOnPragmaMSSeg(SourceLocation PragmaLocation,
8295 PragmaMsStackAction Action,
8296 llvm::StringRef StackSlotLabel,
8297 StringLiteral *SegmentName,
8298 llvm::StringRef PragmaName);
8299
8300 /// \brief Called on well formed \#pragma section().
8301 void ActOnPragmaMSSection(SourceLocation PragmaLocation,
8302 int SectionFlags, StringLiteral *SegmentName);
8303
8304 /// \brief Called on well-formed \#pragma init_seg().
8305 void ActOnPragmaMSInitSeg(SourceLocation PragmaLocation,
8306 StringLiteral *SegmentName);
8307
8308 /// \brief Called on #pragma clang __debug dump II
8309 void ActOnPragmaDump(Scope *S, SourceLocation Loc, IdentifierInfo *II);
8310
8311 /// ActOnPragmaDetectMismatch - Call on well-formed \#pragma detect_mismatch
8312 void ActOnPragmaDetectMismatch(SourceLocation Loc, StringRef Name,
8313 StringRef Value);
8314
8315 /// ActOnPragmaUnused - Called on well-formed '\#pragma unused'.
8316 void ActOnPragmaUnused(const Token &Identifier,
8317 Scope *curScope,
8318 SourceLocation PragmaLoc);
8319
8320 /// ActOnPragmaVisibility - Called on well formed \#pragma GCC visibility... .
8321 void ActOnPragmaVisibility(const IdentifierInfo* VisType,
8322 SourceLocation PragmaLoc);
8323
8324 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II,
8325 SourceLocation Loc);
8326 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W);
8327
8328 /// ActOnPragmaWeakID - Called on well formed \#pragma weak ident.
8329 void ActOnPragmaWeakID(IdentifierInfo* WeakName,
8330 SourceLocation PragmaLoc,
8331 SourceLocation WeakNameLoc);
8332
8333 /// ActOnPragmaRedefineExtname - Called on well formed
8334 /// \#pragma redefine_extname oldname newname.
8335 void ActOnPragmaRedefineExtname(IdentifierInfo* WeakName,
8336 IdentifierInfo* AliasName,
8337 SourceLocation PragmaLoc,
8338 SourceLocation WeakNameLoc,
8339 SourceLocation AliasNameLoc);
8340
8341 /// ActOnPragmaWeakAlias - Called on well formed \#pragma weak ident = ident.
8342 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName,
8343 IdentifierInfo* AliasName,
8344 SourceLocation PragmaLoc,
8345 SourceLocation WeakNameLoc,
8346 SourceLocation AliasNameLoc);
8347
8348 /// ActOnPragmaFPContract - Called on well formed
8349 /// \#pragma {STDC,OPENCL} FP_CONTRACT and
8350 /// \#pragma clang fp contract
8351 void ActOnPragmaFPContract(LangOptions::FPContractModeKind FPC);
8352
8353 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to
8354 /// a the record decl, to handle '\#pragma pack' and '\#pragma options align'.
8355 void AddAlignmentAttributesForRecord(RecordDecl *RD);
8356
8357 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record.
8358 void AddMsStructLayoutForRecord(RecordDecl *RD);
8359
8360 /// FreePackedContext - Deallocate and null out PackContext.
8361 void FreePackedContext();
8362
8363 /// PushNamespaceVisibilityAttr - Note that we've entered a
8364 /// namespace with a visibility attribute.
8365 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr,
8366 SourceLocation Loc);
8367
8368 /// AddPushedVisibilityAttribute - If '\#pragma GCC visibility' was used,
8369 /// add an appropriate visibility attribute.
8370 void AddPushedVisibilityAttribute(Decl *RD);
8371
8372 /// PopPragmaVisibility - Pop the top element of the visibility stack; used
8373 /// for '\#pragma GCC visibility' and visibility attributes on namespaces.
8374 void PopPragmaVisibility(bool IsNamespaceEnd, SourceLocation EndLoc);
8375
8376 /// FreeVisContext - Deallocate and null out VisContext.
8377 void FreeVisContext();
8378
8379 /// AddCFAuditedAttribute - Check whether we're currently within
8380 /// '\#pragma clang arc_cf_code_audited' and, if so, consider adding
8381 /// the appropriate attribute.
8382 void AddCFAuditedAttribute(Decl *D);
8383
8384 /// \brief Called on well-formed '\#pragma clang attribute push'.
8385 void ActOnPragmaAttributePush(AttributeList &Attribute,
8386 SourceLocation PragmaLoc,
8387 attr::ParsedSubjectMatchRuleSet Rules);
8388
8389 /// \brief Called on well-formed '\#pragma clang attribute pop'.
8390 void ActOnPragmaAttributePop(SourceLocation PragmaLoc);
8391
8392 /// \brief Adds the attributes that have been specified using the
8393 /// '\#pragma clang attribute push' directives to the given declaration.
8394 void AddPragmaAttributes(Scope *S, Decl *D);
8395
8396 void DiagnoseUnterminatedPragmaAttribute();
8397
8398 /// \brief Called on well formed \#pragma clang optimize.
8399 void ActOnPragmaOptimize(bool On, SourceLocation PragmaLoc);
8400
8401 /// \brief Get the location for the currently active "\#pragma clang optimize
8402 /// off". If this location is invalid, then the state of the pragma is "on".
8403 SourceLocation getOptimizeOffPragmaLocation() const {
8404 return OptimizeOffPragmaLocation;
8405 }
8406
8407 /// \brief Only called on function definitions; if there is a pragma in scope
8408 /// with the effect of a range-based optnone, consider marking the function
8409 /// with attribute optnone.
8410 void AddRangeBasedOptnone(FunctionDecl *FD);
8411
8412 /// \brief Adds the 'optnone' attribute to the function declaration if there
8413 /// are no conflicts; Loc represents the location causing the 'optnone'
8414 /// attribute to be added (usually because of a pragma).
8415 void AddOptnoneAttributeIfNoConflicts(FunctionDecl *FD, SourceLocation Loc);
8416
8417 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration.
8418 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E,
8419 unsigned SpellingListIndex, bool IsPackExpansion);
8420 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T,
8421 unsigned SpellingListIndex, bool IsPackExpansion);
8422
8423 /// AddAssumeAlignedAttr - Adds an assume_aligned attribute to a particular
8424 /// declaration.
8425 void AddAssumeAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E, Expr *OE,
8426 unsigned SpellingListIndex);
8427
8428 /// AddAllocAlignAttr - Adds an alloc_align attribute to a particular
8429 /// declaration.
8430 void AddAllocAlignAttr(SourceRange AttrRange, Decl *D, Expr *ParamExpr,
8431 unsigned SpellingListIndex);
8432
8433 /// AddAlignValueAttr - Adds an align_value attribute to a particular
8434 /// declaration.
8435 void AddAlignValueAttr(SourceRange AttrRange, Decl *D, Expr *E,
8436 unsigned SpellingListIndex);
8437
8438 /// AddLaunchBoundsAttr - Adds a launch_bounds attribute to a particular
8439 /// declaration.
8440 void AddLaunchBoundsAttr(SourceRange AttrRange, Decl *D, Expr *MaxThreads,
8441 Expr *MinBlocks, unsigned SpellingListIndex);
8442
8443 /// AddModeAttr - Adds a mode attribute to a particular declaration.
8444 void AddModeAttr(SourceRange AttrRange, Decl *D, IdentifierInfo *Name,
8445 unsigned SpellingListIndex, bool InInstantiation = false);
8446
8447 void AddParameterABIAttr(SourceRange AttrRange, Decl *D,
8448 ParameterABI ABI, unsigned SpellingListIndex);
8449
8450 void AddNSConsumedAttr(SourceRange AttrRange, Decl *D,
8451 unsigned SpellingListIndex, bool isNSConsumed,
8452 bool isTemplateInstantiation);
8453
8454 bool checkNSReturnsRetainedReturnType(SourceLocation loc, QualType type);
8455
8456 //===--------------------------------------------------------------------===//
8457 // C++ Coroutines TS
8458 //
8459 bool ActOnCoroutineBodyStart(Scope *S, SourceLocation KwLoc,
8460 StringRef Keyword);
8461 ExprResult ActOnCoawaitExpr(Scope *S, SourceLocation KwLoc, Expr *E);
8462 ExprResult ActOnCoyieldExpr(Scope *S, SourceLocation KwLoc, Expr *E);
8463 StmtResult ActOnCoreturnStmt(Scope *S, SourceLocation KwLoc, Expr *E);
8464
8465 ExprResult BuildResolvedCoawaitExpr(SourceLocation KwLoc, Expr *E,
8466 bool IsImplicit = false);
8467 ExprResult BuildUnresolvedCoawaitExpr(SourceLocation KwLoc, Expr *E,
8468 UnresolvedLookupExpr* Lookup);
8469 ExprResult BuildCoyieldExpr(SourceLocation KwLoc, Expr *E);
8470 StmtResult BuildCoreturnStmt(SourceLocation KwLoc, Expr *E,
8471 bool IsImplicit = false);
8472 StmtResult BuildCoroutineBodyStmt(CoroutineBodyStmt::CtorArgs);
8473 VarDecl *buildCoroutinePromise(SourceLocation Loc);
8474 void CheckCompletedCoroutineBody(FunctionDecl *FD, Stmt *&Body);
8475
8476 //===--------------------------------------------------------------------===//
8477 // OpenCL extensions.
8478 //
8479private:
8480 std::string CurrOpenCLExtension;
8481 /// Extensions required by an OpenCL type.
8482 llvm::DenseMap<const Type*, std::set<std::string>> OpenCLTypeExtMap;
8483 /// Extensions required by an OpenCL declaration.
8484 llvm::DenseMap<const Decl*, std::set<std::string>> OpenCLDeclExtMap;
8485public:
8486 llvm::StringRef getCurrentOpenCLExtension() const {
8487 return CurrOpenCLExtension;
8488 }
8489 void setCurrentOpenCLExtension(llvm::StringRef Ext) {
8490 CurrOpenCLExtension = Ext;
8491 }
8492
8493 /// \brief Set OpenCL extensions for a type which can only be used when these
8494 /// OpenCL extensions are enabled. If \p Exts is empty, do nothing.
8495 /// \param Exts A space separated list of OpenCL extensions.
8496 void setOpenCLExtensionForType(QualType T, llvm::StringRef Exts);
8497
8498 /// \brief Set OpenCL extensions for a declaration which can only be
8499 /// used when these OpenCL extensions are enabled. If \p Exts is empty, do
8500 /// nothing.
8501 /// \param Exts A space separated list of OpenCL extensions.
8502 void setOpenCLExtensionForDecl(Decl *FD, llvm::StringRef Exts);
8503
8504 /// \brief Set current OpenCL extensions for a type which can only be used
8505 /// when these OpenCL extensions are enabled. If current OpenCL extension is
8506 /// empty, do nothing.
8507 void setCurrentOpenCLExtensionForType(QualType T);
8508
8509 /// \brief Set current OpenCL extensions for a declaration which
8510 /// can only be used when these OpenCL extensions are enabled. If current
8511 /// OpenCL extension is empty, do nothing.
8512 void setCurrentOpenCLExtensionForDecl(Decl *FD);
8513
8514 bool isOpenCLDisabledDecl(Decl *FD);
8515
8516 /// \brief Check if type \p T corresponding to declaration specifier \p DS
8517 /// is disabled due to required OpenCL extensions being disabled. If so,
8518 /// emit diagnostics.
8519 /// \return true if type is disabled.
8520 bool checkOpenCLDisabledTypeDeclSpec(const DeclSpec &DS, QualType T);
8521
8522 /// \brief Check if declaration \p D used by expression \p E
8523 /// is disabled due to required OpenCL extensions being disabled. If so,
8524 /// emit diagnostics.
8525 /// \return true if type is disabled.
8526 bool checkOpenCLDisabledDecl(const NamedDecl &D, const Expr &E);
8527
8528 //===--------------------------------------------------------------------===//
8529 // OpenMP directives and clauses.
8530 //
8531private:
8532 void *VarDataSharingAttributesStack;
8533 /// Set to true inside '#pragma omp declare target' region.
8534 bool IsInOpenMPDeclareTargetContext = false;
8535 /// \brief Initialization of data-sharing attributes stack.
8536 void InitDataSharingAttributesStack();
8537 void DestroyDataSharingAttributesStack();
8538 ExprResult
8539 VerifyPositiveIntegerConstantInClause(Expr *Op, OpenMPClauseKind CKind,
8540 bool StrictlyPositive = true);
8541 /// Returns OpenMP nesting level for current directive.
8542 unsigned getOpenMPNestingLevel() const;
8543
8544 /// Push new OpenMP function region for non-capturing function.
8545 void pushOpenMPFunctionRegion();
8546
8547 /// Pop OpenMP function region for non-capturing function.
8548 void popOpenMPFunctionRegion(const sema::FunctionScopeInfo *OldFSI);
8549
8550 /// Checks if a type or a declaration is disabled due to the owning extension
8551 /// being disabled, and emits diagnostic messages if it is disabled.
8552 /// \param D type or declaration to be checked.
8553 /// \param DiagLoc source location for the diagnostic message.
8554 /// \param DiagInfo information to be emitted for the diagnostic message.
8555 /// \param SrcRange source range of the declaration.
8556 /// \param Map maps type or declaration to the extensions.
8557 /// \param Selector selects diagnostic message: 0 for type and 1 for
8558 /// declaration.
8559 /// \return true if the type or declaration is disabled.
8560 template <typename T, typename DiagLocT, typename DiagInfoT, typename MapT>
8561 bool checkOpenCLDisabledTypeOrDecl(T D, DiagLocT DiagLoc, DiagInfoT DiagInfo,
8562 MapT &Map, unsigned Selector = 0,
8563 SourceRange SrcRange = SourceRange());
8564
8565public:
8566 /// \brief Return true if the provided declaration \a VD should be captured by
8567 /// reference.
8568 /// \param Level Relative level of nested OpenMP construct for that the check
8569 /// is performed.
8570 bool IsOpenMPCapturedByRef(ValueDecl *D, unsigned Level);
8571
8572 /// \brief Check if the specified variable is used in one of the private
8573 /// clauses (private, firstprivate, lastprivate, reduction etc.) in OpenMP
8574 /// constructs.
8575 VarDecl *IsOpenMPCapturedDecl(ValueDecl *D);
8576 ExprResult getOpenMPCapturedExpr(VarDecl *Capture, ExprValueKind VK,
8577 ExprObjectKind OK, SourceLocation Loc);
8578
8579 /// \brief Check if the specified variable is used in 'private' clause.
8580 /// \param Level Relative level of nested OpenMP construct for that the check
8581 /// is performed.
8582 bool isOpenMPPrivateDecl(ValueDecl *D, unsigned Level);
8583
8584 /// Sets OpenMP capture kind (OMPC_private, OMPC_firstprivate, OMPC_map etc.)
8585 /// for \p FD based on DSA for the provided corresponding captured declaration
8586 /// \p D.
8587 void setOpenMPCaptureKind(FieldDecl *FD, ValueDecl *D, unsigned Level);
8588
8589 /// \brief Check if the specified variable is captured by 'target' directive.
8590 /// \param Level Relative level of nested OpenMP construct for that the check
8591 /// is performed.
8592 bool isOpenMPTargetCapturedDecl(ValueDecl *D, unsigned Level);
8593
8594 ExprResult PerformOpenMPImplicitIntegerConversion(SourceLocation OpLoc,
8595 Expr *Op);
8596 /// \brief Called on start of new data sharing attribute block.
8597 void StartOpenMPDSABlock(OpenMPDirectiveKind K,
8598 const DeclarationNameInfo &DirName, Scope *CurScope,
8599 SourceLocation Loc);
8600 /// \brief Start analysis of clauses.
8601 void StartOpenMPClause(OpenMPClauseKind K);
8602 /// \brief End analysis of clauses.
8603 void EndOpenMPClause();
8604 /// \brief Called on end of data sharing attribute block.
8605 void EndOpenMPDSABlock(Stmt *CurDirective);
8606
8607 /// \brief Check if the current region is an OpenMP loop region and if it is,
8608 /// mark loop control variable, used in \p Init for loop initialization, as
8609 /// private by default.
8610 /// \param Init First part of the for loop.
8611 void ActOnOpenMPLoopInitialization(SourceLocation ForLoc, Stmt *Init);
8612
8613 // OpenMP directives and clauses.
8614 /// \brief Called on correct id-expression from the '#pragma omp
8615 /// threadprivate'.
8616 ExprResult ActOnOpenMPIdExpression(Scope *CurScope,
8617 CXXScopeSpec &ScopeSpec,
8618 const DeclarationNameInfo &Id);
8619 /// \brief Called on well-formed '#pragma omp threadprivate'.
8620 DeclGroupPtrTy ActOnOpenMPThreadprivateDirective(
8621 SourceLocation Loc,
8622 ArrayRef<Expr *> VarList);
8623 /// \brief Builds a new OpenMPThreadPrivateDecl and checks its correctness.
8624 OMPThreadPrivateDecl *CheckOMPThreadPrivateDecl(
8625 SourceLocation Loc,
8626 ArrayRef<Expr *> VarList);
8627 /// \brief Check if the specified type is allowed to be used in 'omp declare
8628 /// reduction' construct.
8629 QualType ActOnOpenMPDeclareReductionType(SourceLocation TyLoc,
8630 TypeResult ParsedType);
8631 /// \brief Called on start of '#pragma omp declare reduction'.
8632 DeclGroupPtrTy ActOnOpenMPDeclareReductionDirectiveStart(
8633 Scope *S, DeclContext *DC, DeclarationName Name,
8634 ArrayRef<std::pair<QualType, SourceLocation>> ReductionTypes,
8635 AccessSpecifier AS, Decl *PrevDeclInScope = nullptr);
8636 /// \brief Initialize declare reduction construct initializer.
8637 void ActOnOpenMPDeclareReductionCombinerStart(Scope *S, Decl *D);
8638 /// \brief Finish current declare reduction construct initializer.
8639 void ActOnOpenMPDeclareReductionCombinerEnd(Decl *D, Expr *Combiner);
8640 /// \brief Initialize declare reduction construct initializer.
8641 /// \return omp_priv variable.
8642 VarDecl *ActOnOpenMPDeclareReductionInitializerStart(Scope *S, Decl *D);
8643 /// \brief Finish current declare reduction construct initializer.
8644 void ActOnOpenMPDeclareReductionInitializerEnd(Decl *D, Expr *Initializer,
8645 VarDecl *OmpPrivParm);
8646 /// \brief Called at the end of '#pragma omp declare reduction'.
8647 DeclGroupPtrTy ActOnOpenMPDeclareReductionDirectiveEnd(
8648 Scope *S, DeclGroupPtrTy DeclReductions, bool IsValid);
8649
8650 /// Called on the start of target region i.e. '#pragma omp declare target'.
8651 bool ActOnStartOpenMPDeclareTargetDirective(SourceLocation Loc);
8652 /// Called at the end of target region i.e. '#pragme omp end declare target'.
8653 void ActOnFinishOpenMPDeclareTargetDirective();
8654 /// Called on correct id-expression from the '#pragma omp declare target'.
8655 void ActOnOpenMPDeclareTargetName(Scope *CurScope, CXXScopeSpec &ScopeSpec,
8656 const DeclarationNameInfo &Id,
8657 OMPDeclareTargetDeclAttr::MapTypeTy MT,
8658 NamedDeclSetType &SameDirectiveDecls);
8659 /// Check declaration inside target region.
8660 void checkDeclIsAllowedInOpenMPTarget(Expr *E, Decl *D);
8661 /// Return true inside OpenMP declare target region.
8662 bool isInOpenMPDeclareTargetContext() const {
8663 return IsInOpenMPDeclareTargetContext;
8664 }
8665 /// Return true inside OpenMP target region.
8666 bool isInOpenMPTargetExecutionDirective() const;
8667 /// Return true if (un)supported features for the current target should be
8668 /// diagnosed if OpenMP (offloading) is enabled.
8669 bool shouldDiagnoseTargetSupportFromOpenMP() const {
8670 return !getLangOpts().OpenMPIsDevice || isInOpenMPDeclareTargetContext() ||
8671 isInOpenMPTargetExecutionDirective();
8672 }
8673
8674 /// Return the number of captured regions created for an OpenMP directive.
8675 static int getOpenMPCaptureLevels(OpenMPDirectiveKind Kind);
8676
8677 /// \brief Initialization of captured region for OpenMP region.
8678 void ActOnOpenMPRegionStart(OpenMPDirectiveKind DKind, Scope *CurScope);
8679 /// \brief End of OpenMP region.
8680 ///
8681 /// \param S Statement associated with the current OpenMP region.
8682 /// \param Clauses List of clauses for the current OpenMP region.
8683 ///
8684 /// \returns Statement for finished OpenMP region.
8685 StmtResult ActOnOpenMPRegionEnd(StmtResult S, ArrayRef<OMPClause *> Clauses);
8686 StmtResult ActOnOpenMPExecutableDirective(
8687 OpenMPDirectiveKind Kind, const DeclarationNameInfo &DirName,
8688 OpenMPDirectiveKind CancelRegion, ArrayRef<OMPClause *> Clauses,
8689 Stmt *AStmt, SourceLocation StartLoc, SourceLocation EndLoc);
8690 /// \brief Called on well-formed '\#pragma omp parallel' after parsing
8691 /// of the associated statement.
8692 StmtResult ActOnOpenMPParallelDirective(ArrayRef<OMPClause *> Clauses,
8693 Stmt *AStmt,
8694 SourceLocation StartLoc,
8695 SourceLocation EndLoc);
8696 /// \brief Called on well-formed '\#pragma omp simd' after parsing
8697 /// of the associated statement.
8698 StmtResult ActOnOpenMPSimdDirective(
8699 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
8700 SourceLocation EndLoc,
8701 llvm::DenseMap<ValueDecl *, Expr *> &VarsWithImplicitDSA);
8702 /// \brief Called on well-formed '\#pragma omp for' after parsing
8703 /// of the associated statement.
8704 StmtResult ActOnOpenMPForDirective(
8705 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
8706 SourceLocation EndLoc,
8707 llvm::DenseMap<ValueDecl *, Expr *> &VarsWithImplicitDSA);
8708 /// \brief Called on well-formed '\#pragma omp for simd' after parsing
8709 /// of the associated statement.
8710 StmtResult ActOnOpenMPForSimdDirective(
8711 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
8712 SourceLocation EndLoc,
8713 llvm::DenseMap<ValueDecl *, Expr *> &VarsWithImplicitDSA);
8714 /// \brief Called on well-formed '\#pragma omp sections' after parsing
8715 /// of the associated statement.
8716 StmtResult ActOnOpenMPSectionsDirective(ArrayRef<OMPClause *> Clauses,
8717 Stmt *AStmt, SourceLocation StartLoc,
8718 SourceLocation EndLoc);
8719 /// \brief Called on well-formed '\#pragma omp section' after parsing of the
8720 /// associated statement.
8721 StmtResult ActOnOpenMPSectionDirective(Stmt *AStmt, SourceLocation StartLoc,
8722 SourceLocation EndLoc);
8723 /// \brief Called on well-formed '\#pragma omp single' after parsing of the
8724 /// associated statement.
8725 StmtResult ActOnOpenMPSingleDirective(ArrayRef<OMPClause *> Clauses,
8726 Stmt *AStmt, SourceLocation StartLoc,
8727 SourceLocation EndLoc);
8728 /// \brief Called on well-formed '\#pragma omp master' after parsing of the
8729 /// associated statement.
8730 StmtResult ActOnOpenMPMasterDirective(Stmt *AStmt, SourceLocation StartLoc,
8731 SourceLocation EndLoc);
8732 /// \brief Called on well-formed '\#pragma omp critical' after parsing of the
8733 /// associated statement.
8734 StmtResult ActOnOpenMPCriticalDirective(const DeclarationNameInfo &DirName,
8735 ArrayRef<OMPClause *> Clauses,
8736 Stmt *AStmt, SourceLocation StartLoc,
8737 SourceLocation EndLoc);
8738 /// \brief Called on well-formed '\#pragma omp parallel for' after parsing
8739 /// of the associated statement.
8740 StmtResult ActOnOpenMPParallelForDirective(
8741 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
8742 SourceLocation EndLoc,
8743 llvm::DenseMap<ValueDecl *, Expr *> &VarsWithImplicitDSA);
8744 /// \brief Called on well-formed '\#pragma omp parallel for simd' after
8745 /// parsing of the associated statement.
8746 StmtResult ActOnOpenMPParallelForSimdDirective(
8747 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
8748 SourceLocation EndLoc,
8749 llvm::DenseMap<ValueDecl *, Expr *> &VarsWithImplicitDSA);
8750 /// \brief Called on well-formed '\#pragma omp parallel sections' after
8751 /// parsing of the associated statement.
8752 StmtResult ActOnOpenMPParallelSectionsDirective(ArrayRef<OMPClause *> Clauses,
8753 Stmt *AStmt,
8754 SourceLocation StartLoc,
8755 SourceLocation EndLoc);
8756 /// \brief Called on well-formed '\#pragma omp task' after parsing of the
8757 /// associated statement.
8758 StmtResult ActOnOpenMPTaskDirective(ArrayRef<OMPClause *> Clauses,
8759 Stmt *AStmt, SourceLocation StartLoc,
8760 SourceLocation EndLoc);
8761 /// \brief Called on well-formed '\#pragma omp taskyield'.
8762 StmtResult ActOnOpenMPTaskyieldDirective(SourceLocation StartLoc,
8763 SourceLocation EndLoc);
8764 /// \brief Called on well-formed '\#pragma omp barrier'.
8765 StmtResult ActOnOpenMPBarrierDirective(SourceLocation StartLoc,
8766 SourceLocation EndLoc);
8767 /// \brief Called on well-formed '\#pragma omp taskwait'.
8768 StmtResult ActOnOpenMPTaskwaitDirective(SourceLocation StartLoc,
8769 SourceLocation EndLoc);
8770 /// \brief Called on well-formed '\#pragma omp taskgroup'.
8771 StmtResult ActOnOpenMPTaskgroupDirective(ArrayRef<OMPClause *> Clauses,
8772 Stmt *AStmt, SourceLocation StartLoc,
8773 SourceLocation EndLoc);
8774 /// \brief Called on well-formed '\#pragma omp flush'.
8775 StmtResult ActOnOpenMPFlushDirective(ArrayRef<OMPClause *> Clauses,
8776 SourceLocation StartLoc,
8777 SourceLocation EndLoc);
8778 /// \brief Called on well-formed '\#pragma omp ordered' after parsing of the
8779 /// associated statement.
8780 StmtResult ActOnOpenMPOrderedDirective(ArrayRef<OMPClause *> Clauses,
8781 Stmt *AStmt, SourceLocation StartLoc,
8782 SourceLocation EndLoc);
8783 /// \brief Called on well-formed '\#pragma omp atomic' after parsing of the
8784 /// associated statement.
8785 StmtResult ActOnOpenMPAtomicDirective(ArrayRef<OMPClause *> Clauses,
8786 Stmt *AStmt, SourceLocation StartLoc,
8787 SourceLocation EndLoc);
8788 /// \brief Called on well-formed '\#pragma omp target' after parsing of the
8789 /// associated statement.
8790 StmtResult ActOnOpenMPTargetDirective(ArrayRef<OMPClause *> Clauses,
8791 Stmt *AStmt, SourceLocation StartLoc,
8792 SourceLocation EndLoc);
8793 /// \brief Called on well-formed '\#pragma omp target data' after parsing of
8794 /// the associated statement.
8795 StmtResult ActOnOpenMPTargetDataDirective(ArrayRef<OMPClause *> Clauses,
8796 Stmt *AStmt, SourceLocation StartLoc,
8797 SourceLocation EndLoc);
8798 /// \brief Called on well-formed '\#pragma omp target enter data' after
8799 /// parsing of the associated statement.
8800 StmtResult ActOnOpenMPTargetEnterDataDirective(ArrayRef<OMPClause *> Clauses,
8801 SourceLocation StartLoc,
8802 SourceLocation EndLoc,
8803 Stmt *AStmt);
8804 /// \brief Called on well-formed '\#pragma omp target exit data' after
8805 /// parsing of the associated statement.
8806 StmtResult ActOnOpenMPTargetExitDataDirective(ArrayRef<OMPClause *> Clauses,
8807 SourceLocation StartLoc,
8808 SourceLocation EndLoc,
8809 Stmt *AStmt);
8810 /// \brief Called on well-formed '\#pragma omp target parallel' after
8811 /// parsing of the associated statement.
8812 StmtResult ActOnOpenMPTargetParallelDirective(ArrayRef<OMPClause *> Clauses,
8813 Stmt *AStmt,
8814 SourceLocation StartLoc,
8815 SourceLocation EndLoc);
8816 /// \brief Called on well-formed '\#pragma omp target parallel for' after
8817 /// parsing of the associated statement.
8818 StmtResult ActOnOpenMPTargetParallelForDirective(
8819 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
8820 SourceLocation EndLoc,
8821 llvm::DenseMap<ValueDecl *, Expr *> &VarsWithImplicitDSA);
8822 /// \brief Called on well-formed '\#pragma omp teams' after parsing of the
8823 /// associated statement.
8824 StmtResult ActOnOpenMPTeamsDirective(ArrayRef<OMPClause *> Clauses,
8825 Stmt *AStmt, SourceLocation StartLoc,
8826 SourceLocation EndLoc);
8827 /// \brief Called on well-formed '\#pragma omp cancellation point'.
8828 StmtResult
8829 ActOnOpenMPCancellationPointDirective(SourceLocation StartLoc,
8830 SourceLocation EndLoc,
8831 OpenMPDirectiveKind CancelRegion);
8832 /// \brief Called on well-formed '\#pragma omp cancel'.
8833 StmtResult ActOnOpenMPCancelDirective(ArrayRef<OMPClause *> Clauses,
8834 SourceLocation StartLoc,
8835 SourceLocation EndLoc,
8836 OpenMPDirectiveKind CancelRegion);
8837 /// \brief Called on well-formed '\#pragma omp taskloop' after parsing of the
8838 /// associated statement.
8839 StmtResult ActOnOpenMPTaskLoopDirective(
8840 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
8841 SourceLocation EndLoc,
8842 llvm::DenseMap<ValueDecl *, Expr *> &VarsWithImplicitDSA);
8843 /// \brief Called on well-formed '\#pragma omp taskloop simd' after parsing of
8844 /// the associated statement.
8845 StmtResult ActOnOpenMPTaskLoopSimdDirective(
8846 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
8847 SourceLocation EndLoc,
8848 llvm::DenseMap<ValueDecl *, Expr *> &VarsWithImplicitDSA);
8849 /// \brief Called on well-formed '\#pragma omp distribute' after parsing
8850 /// of the associated statement.
8851 StmtResult ActOnOpenMPDistributeDirective(
8852 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
8853 SourceLocation EndLoc,
8854 llvm::DenseMap<ValueDecl *, Expr *> &VarsWithImplicitDSA);
8855 /// \brief Called on well-formed '\#pragma omp target update'.
8856 StmtResult ActOnOpenMPTargetUpdateDirective(ArrayRef<OMPClause *> Clauses,
8857 SourceLocation StartLoc,
8858 SourceLocation EndLoc,
8859 Stmt *AStmt);
8860 /// \brief Called on well-formed '\#pragma omp distribute parallel for' after
8861 /// parsing of the associated statement.
8862 StmtResult ActOnOpenMPDistributeParallelForDirective(
8863 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
8864 SourceLocation EndLoc,
8865 llvm::DenseMap<ValueDecl *, Expr *> &VarsWithImplicitDSA);
8866 /// \brief Called on well-formed '\#pragma omp distribute parallel for simd'
8867 /// after parsing of the associated statement.
8868 StmtResult ActOnOpenMPDistributeParallelForSimdDirective(
8869 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
8870 SourceLocation EndLoc,
8871 llvm::DenseMap<ValueDecl *, Expr *> &VarsWithImplicitDSA);
8872 /// \brief Called on well-formed '\#pragma omp distribute simd' after
8873 /// parsing of the associated statement.
8874 StmtResult ActOnOpenMPDistributeSimdDirective(
8875 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
8876 SourceLocation EndLoc,
8877 llvm::DenseMap<ValueDecl *, Expr *> &VarsWithImplicitDSA);
8878 /// \brief Called on well-formed '\#pragma omp target parallel for simd' after
8879 /// parsing of the associated statement.
8880 StmtResult ActOnOpenMPTargetParallelForSimdDirective(
8881 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
8882 SourceLocation EndLoc,
8883 llvm::DenseMap<ValueDecl *, Expr *> &VarsWithImplicitDSA);
8884 /// \brief Called on well-formed '\#pragma omp target simd' after parsing of
8885 /// the associated statement.
8886 StmtResult ActOnOpenMPTargetSimdDirective(
8887 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
8888 SourceLocation EndLoc,
8889 llvm::DenseMap<ValueDecl *, Expr *> &VarsWithImplicitDSA);
8890 /// Called on well-formed '\#pragma omp teams distribute' after parsing of
8891 /// the associated statement.
8892 StmtResult ActOnOpenMPTeamsDistributeDirective(
8893 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
8894 SourceLocation EndLoc,
8895 llvm::DenseMap<ValueDecl *, Expr *> &VarsWithImplicitDSA);
8896 /// Called on well-formed '\#pragma omp teams distribute simd' after parsing
8897 /// of the associated statement.
8898 StmtResult ActOnOpenMPTeamsDistributeSimdDirective(
8899 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
8900 SourceLocation EndLoc,
8901 llvm::DenseMap<ValueDecl *, Expr *> &VarsWithImplicitDSA);
8902 /// Called on well-formed '\#pragma omp teams distribute parallel for simd'
8903 /// after parsing of the associated statement.
8904 StmtResult ActOnOpenMPTeamsDistributeParallelForSimdDirective(
8905 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
8906 SourceLocation EndLoc,
8907 llvm::DenseMap<ValueDecl *, Expr *> &VarsWithImplicitDSA);
8908 /// Called on well-formed '\#pragma omp teams distribute parallel for'
8909 /// after parsing of the associated statement.
8910 StmtResult ActOnOpenMPTeamsDistributeParallelForDirective(
8911 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
8912 SourceLocation EndLoc,
8913 llvm::DenseMap<ValueDecl *, Expr *> &VarsWithImplicitDSA);
8914 /// Called on well-formed '\#pragma omp target teams' after parsing of the
8915 /// associated statement.
8916 StmtResult ActOnOpenMPTargetTeamsDirective(ArrayRef<OMPClause *> Clauses,
8917 Stmt *AStmt,
8918 SourceLocation StartLoc,
8919 SourceLocation EndLoc);
8920 /// Called on well-formed '\#pragma omp target teams distribute' after parsing
8921 /// of the associated statement.
8922 StmtResult ActOnOpenMPTargetTeamsDistributeDirective(
8923 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
8924 SourceLocation EndLoc,
8925 llvm::DenseMap<ValueDecl *, Expr *> &VarsWithImplicitDSA);
8926 /// Called on well-formed '\#pragma omp target teams distribute parallel for'
8927 /// after parsing of the associated statement.
8928 StmtResult ActOnOpenMPTargetTeamsDistributeParallelForDirective(
8929 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
8930 SourceLocation EndLoc,
8931 llvm::DenseMap<ValueDecl *, Expr *> &VarsWithImplicitDSA);
8932 /// Called on well-formed '\#pragma omp target teams distribute parallel for
8933 /// simd' after parsing of the associated statement.
8934 StmtResult ActOnOpenMPTargetTeamsDistributeParallelForSimdDirective(
8935 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
8936 SourceLocation EndLoc,
8937 llvm::DenseMap<ValueDecl *, Expr *> &VarsWithImplicitDSA);
8938 /// Called on well-formed '\#pragma omp target teams distribute simd' after
8939 /// parsing of the associated statement.
8940 StmtResult ActOnOpenMPTargetTeamsDistributeSimdDirective(
8941 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
8942 SourceLocation EndLoc,
8943 llvm::DenseMap<ValueDecl *, Expr *> &VarsWithImplicitDSA);
8944
8945 /// Checks correctness of linear modifiers.
8946 bool CheckOpenMPLinearModifier(OpenMPLinearClauseKind LinKind,
8947 SourceLocation LinLoc);
8948 /// Checks that the specified declaration matches requirements for the linear
8949 /// decls.
8950 bool CheckOpenMPLinearDecl(ValueDecl *D, SourceLocation ELoc,
8951 OpenMPLinearClauseKind LinKind, QualType Type);
8952
8953 /// \brief Called on well-formed '\#pragma omp declare simd' after parsing of
8954 /// the associated method/function.
8955 DeclGroupPtrTy ActOnOpenMPDeclareSimdDirective(
8956 DeclGroupPtrTy DG, OMPDeclareSimdDeclAttr::BranchStateTy BS,
8957 Expr *Simdlen, ArrayRef<Expr *> Uniforms, ArrayRef<Expr *> Aligneds,
8958 ArrayRef<Expr *> Alignments, ArrayRef<Expr *> Linears,
8959 ArrayRef<unsigned> LinModifiers, ArrayRef<Expr *> Steps, SourceRange SR);
8960
8961 OMPClause *ActOnOpenMPSingleExprClause(OpenMPClauseKind Kind,
8962 Expr *Expr,
8963 SourceLocation StartLoc,
8964 SourceLocation LParenLoc,
8965 SourceLocation EndLoc);
8966 /// \brief Called on well-formed 'if' clause.
8967 OMPClause *ActOnOpenMPIfClause(OpenMPDirectiveKind NameModifier,
8968 Expr *Condition, SourceLocation StartLoc,
8969 SourceLocation LParenLoc,
8970 SourceLocation NameModifierLoc,
8971 SourceLocation ColonLoc,
8972 SourceLocation EndLoc);
8973 /// \brief Called on well-formed 'final' clause.
8974 OMPClause *ActOnOpenMPFinalClause(Expr *Condition, SourceLocation StartLoc,
8975 SourceLocation LParenLoc,
8976 SourceLocation EndLoc);
8977 /// \brief Called on well-formed 'num_threads' clause.
8978 OMPClause *ActOnOpenMPNumThreadsClause(Expr *NumThreads,
8979 SourceLocation StartLoc,
8980 SourceLocation LParenLoc,
8981 SourceLocation EndLoc);
8982 /// \brief Called on well-formed 'safelen' clause.
8983 OMPClause *ActOnOpenMPSafelenClause(Expr *Length,
8984 SourceLocation StartLoc,
8985 SourceLocation LParenLoc,
8986 SourceLocation EndLoc);
8987 /// \brief Called on well-formed 'simdlen' clause.
8988 OMPClause *ActOnOpenMPSimdlenClause(Expr *Length, SourceLocation StartLoc,
8989 SourceLocation LParenLoc,
8990 SourceLocation EndLoc);
8991 /// \brief Called on well-formed 'collapse' clause.
8992 OMPClause *ActOnOpenMPCollapseClause(Expr *NumForLoops,
8993 SourceLocation StartLoc,
8994 SourceLocation LParenLoc,
8995 SourceLocation EndLoc);
8996 /// \brief Called on well-formed 'ordered' clause.
8997 OMPClause *
8998 ActOnOpenMPOrderedClause(SourceLocation StartLoc, SourceLocation EndLoc,
8999 SourceLocation LParenLoc = SourceLocation(),
9000 Expr *NumForLoops = nullptr);
9001 /// \brief Called on well-formed 'grainsize' clause.
9002 OMPClause *ActOnOpenMPGrainsizeClause(Expr *Size, SourceLocation StartLoc,
9003 SourceLocation LParenLoc,
9004 SourceLocation EndLoc);
9005 /// \brief Called on well-formed 'num_tasks' clause.
9006 OMPClause *ActOnOpenMPNumTasksClause(Expr *NumTasks, SourceLocation StartLoc,
9007 SourceLocation LParenLoc,
9008 SourceLocation EndLoc);
9009 /// \brief Called on well-formed 'hint' clause.
9010 OMPClause *ActOnOpenMPHintClause(Expr *Hint, SourceLocation StartLoc,
9011 SourceLocation LParenLoc,
9012 SourceLocation EndLoc);
9013
9014 OMPClause *ActOnOpenMPSimpleClause(OpenMPClauseKind Kind,
9015 unsigned Argument,
9016 SourceLocation ArgumentLoc,
9017 SourceLocation StartLoc,
9018 SourceLocation LParenLoc,
9019 SourceLocation EndLoc);
9020 /// \brief Called on well-formed 'default' clause.
9021 OMPClause *ActOnOpenMPDefaultClause(OpenMPDefaultClauseKind Kind,
9022 SourceLocation KindLoc,
9023 SourceLocation StartLoc,
9024 SourceLocation LParenLoc,
9025 SourceLocation EndLoc);
9026 /// \brief Called on well-formed 'proc_bind' clause.
9027 OMPClause *ActOnOpenMPProcBindClause(OpenMPProcBindClauseKind Kind,
9028 SourceLocation KindLoc,
9029 SourceLocation StartLoc,
9030 SourceLocation LParenLoc,
9031 SourceLocation EndLoc);
9032
9033 OMPClause *ActOnOpenMPSingleExprWithArgClause(
9034 OpenMPClauseKind Kind, ArrayRef<unsigned> Arguments, Expr *Expr,
9035 SourceLocation StartLoc, SourceLocation LParenLoc,
9036 ArrayRef<SourceLocation> ArgumentsLoc, SourceLocation DelimLoc,
9037 SourceLocation EndLoc);
9038 /// \brief Called on well-formed 'schedule' clause.
9039 OMPClause *ActOnOpenMPScheduleClause(
9040 OpenMPScheduleClauseModifier M1, OpenMPScheduleClauseModifier M2,
9041 OpenMPScheduleClauseKind Kind, Expr *ChunkSize, SourceLocation StartLoc,
9042 SourceLocation LParenLoc, SourceLocation M1Loc, SourceLocation M2Loc,
9043 SourceLocation KindLoc, SourceLocation CommaLoc, SourceLocation EndLoc);
9044
9045 OMPClause *ActOnOpenMPClause(OpenMPClauseKind Kind, SourceLocation StartLoc,
9046 SourceLocation EndLoc);
9047 /// \brief Called on well-formed 'nowait' clause.
9048 OMPClause *ActOnOpenMPNowaitClause(SourceLocation StartLoc,
9049 SourceLocation EndLoc);
9050 /// \brief Called on well-formed 'untied' clause.
9051 OMPClause *ActOnOpenMPUntiedClause(SourceLocation StartLoc,
9052 SourceLocation EndLoc);
9053 /// \brief Called on well-formed 'mergeable' clause.
9054 OMPClause *ActOnOpenMPMergeableClause(SourceLocation StartLoc,
9055 SourceLocation EndLoc);
9056 /// \brief Called on well-formed 'read' clause.
9057 OMPClause *ActOnOpenMPReadClause(SourceLocation StartLoc,
9058 SourceLocation EndLoc);
9059 /// \brief Called on well-formed 'write' clause.
9060 OMPClause *ActOnOpenMPWriteClause(SourceLocation StartLoc,
9061 SourceLocation EndLoc);
9062 /// \brief Called on well-formed 'update' clause.
9063 OMPClause *ActOnOpenMPUpdateClause(SourceLocation StartLoc,
9064 SourceLocation EndLoc);
9065 /// \brief Called on well-formed 'capture' clause.
9066 OMPClause *ActOnOpenMPCaptureClause(SourceLocation StartLoc,
9067 SourceLocation EndLoc);
9068 /// \brief Called on well-formed 'seq_cst' clause.
9069 OMPClause *ActOnOpenMPSeqCstClause(SourceLocation StartLoc,
9070 SourceLocation EndLoc);
9071 /// \brief Called on well-formed 'threads' clause.
9072 OMPClause *ActOnOpenMPThreadsClause(SourceLocation StartLoc,
9073 SourceLocation EndLoc);
9074 /// \brief Called on well-formed 'simd' clause.
9075 OMPClause *ActOnOpenMPSIMDClause(SourceLocation StartLoc,
9076 SourceLocation EndLoc);
9077 /// \brief Called on well-formed 'nogroup' clause.
9078 OMPClause *ActOnOpenMPNogroupClause(SourceLocation StartLoc,
9079 SourceLocation EndLoc);
9080
9081 OMPClause *ActOnOpenMPVarListClause(
9082 OpenMPClauseKind Kind, ArrayRef<Expr *> Vars, Expr *TailExpr,
9083 SourceLocation StartLoc, SourceLocation LParenLoc,
9084 SourceLocation ColonLoc, SourceLocation EndLoc,
9085 CXXScopeSpec &ReductionIdScopeSpec,
9086 const DeclarationNameInfo &ReductionId, OpenMPDependClauseKind DepKind,
9087 OpenMPLinearClauseKind LinKind, OpenMPMapClauseKind MapTypeModifier,
9088 OpenMPMapClauseKind MapType, bool IsMapTypeImplicit,
9089 SourceLocation DepLinMapLoc);
9090 /// \brief Called on well-formed 'private' clause.
9091 OMPClause *ActOnOpenMPPrivateClause(ArrayRef<Expr *> VarList,
9092 SourceLocation StartLoc,
9093 SourceLocation LParenLoc,
9094 SourceLocation EndLoc);
9095 /// \brief Called on well-formed 'firstprivate' clause.
9096 OMPClause *ActOnOpenMPFirstprivateClause(ArrayRef<Expr *> VarList,
9097 SourceLocation StartLoc,
9098 SourceLocation LParenLoc,
9099 SourceLocation EndLoc);
9100 /// \brief Called on well-formed 'lastprivate' clause.
9101 OMPClause *ActOnOpenMPLastprivateClause(ArrayRef<Expr *> VarList,
9102 SourceLocation StartLoc,
9103 SourceLocation LParenLoc,
9104 SourceLocation EndLoc);
9105 /// \brief Called on well-formed 'shared' clause.
9106 OMPClause *ActOnOpenMPSharedClause(ArrayRef<Expr *> VarList,
9107 SourceLocation StartLoc,
9108 SourceLocation LParenLoc,
9109 SourceLocation EndLoc);
9110 /// \brief Called on well-formed 'reduction' clause.
9111 OMPClause *ActOnOpenMPReductionClause(
9112 ArrayRef<Expr *> VarList, SourceLocation StartLoc,
9113 SourceLocation LParenLoc, SourceLocation ColonLoc, SourceLocation EndLoc,
9114 CXXScopeSpec &ReductionIdScopeSpec,
9115 const DeclarationNameInfo &ReductionId,
9116 ArrayRef<Expr *> UnresolvedReductions = llvm::None);
9117 /// Called on well-formed 'task_reduction' clause.
9118 OMPClause *ActOnOpenMPTaskReductionClause(
9119 ArrayRef<Expr *> VarList, SourceLocation StartLoc,
9120 SourceLocation LParenLoc, SourceLocation ColonLoc, SourceLocation EndLoc,
9121 CXXScopeSpec &ReductionIdScopeSpec,
9122 const DeclarationNameInfo &ReductionId,
9123 ArrayRef<Expr *> UnresolvedReductions = llvm::None);
9124 /// Called on well-formed 'in_reduction' clause.
9125 OMPClause *ActOnOpenMPInReductionClause(
9126 ArrayRef<Expr *> VarList, SourceLocation StartLoc,
9127 SourceLocation LParenLoc, SourceLocation ColonLoc, SourceLocation EndLoc,
9128 CXXScopeSpec &ReductionIdScopeSpec,
9129 const DeclarationNameInfo &ReductionId,
9130 ArrayRef<Expr *> UnresolvedReductions = llvm::None);
9131 /// \brief Called on well-formed 'linear' clause.
9132 OMPClause *
9133 ActOnOpenMPLinearClause(ArrayRef<Expr *> VarList, Expr *Step,
9134 SourceLocation StartLoc, SourceLocation LParenLoc,
9135 OpenMPLinearClauseKind LinKind, SourceLocation LinLoc,
9136 SourceLocation ColonLoc, SourceLocation EndLoc);
9137 /// \brief Called on well-formed 'aligned' clause.
9138 OMPClause *ActOnOpenMPAlignedClause(ArrayRef<Expr *> VarList,
9139 Expr *Alignment,
9140 SourceLocation StartLoc,
9141 SourceLocation LParenLoc,
9142 SourceLocation ColonLoc,
9143 SourceLocation EndLoc);
9144 /// \brief Called on well-formed 'copyin' clause.
9145 OMPClause *ActOnOpenMPCopyinClause(ArrayRef<Expr *> VarList,
9146 SourceLocation StartLoc,
9147 SourceLocation LParenLoc,
9148 SourceLocation EndLoc);
9149 /// \brief Called on well-formed 'copyprivate' clause.
9150 OMPClause *ActOnOpenMPCopyprivateClause(ArrayRef<Expr *> VarList,
9151 SourceLocation StartLoc,
9152 SourceLocation LParenLoc,
9153 SourceLocation EndLoc);
9154 /// \brief Called on well-formed 'flush' pseudo clause.
9155 OMPClause *ActOnOpenMPFlushClause(ArrayRef<Expr *> VarList,
9156 SourceLocation StartLoc,
9157 SourceLocation LParenLoc,
9158 SourceLocation EndLoc);
9159 /// \brief Called on well-formed 'depend' clause.
9160 OMPClause *
9161 ActOnOpenMPDependClause(OpenMPDependClauseKind DepKind, SourceLocation DepLoc,
9162 SourceLocation ColonLoc, ArrayRef<Expr *> VarList,
9163 SourceLocation StartLoc, SourceLocation LParenLoc,
9164 SourceLocation EndLoc);
9165 /// \brief Called on well-formed 'device' clause.
9166 OMPClause *ActOnOpenMPDeviceClause(Expr *Device, SourceLocation StartLoc,
9167 SourceLocation LParenLoc,
9168 SourceLocation EndLoc);
9169 /// \brief Called on well-formed 'map' clause.
9170 OMPClause *
9171 ActOnOpenMPMapClause(OpenMPMapClauseKind MapTypeModifier,
9172 OpenMPMapClauseKind MapType, bool IsMapTypeImplicit,
9173 SourceLocation MapLoc, SourceLocation ColonLoc,
9174 ArrayRef<Expr *> VarList, SourceLocation StartLoc,
9175 SourceLocation LParenLoc, SourceLocation EndLoc);
9176 /// \brief Called on well-formed 'num_teams' clause.
9177 OMPClause *ActOnOpenMPNumTeamsClause(Expr *NumTeams, SourceLocation StartLoc,
9178 SourceLocation LParenLoc,
9179 SourceLocation EndLoc);
9180 /// \brief Called on well-formed 'thread_limit' clause.
9181 OMPClause *ActOnOpenMPThreadLimitClause(Expr *ThreadLimit,
9182 SourceLocation StartLoc,
9183 SourceLocation LParenLoc,
9184 SourceLocation EndLoc);
9185 /// \brief Called on well-formed 'priority' clause.
9186 OMPClause *ActOnOpenMPPriorityClause(Expr *Priority, SourceLocation StartLoc,
9187 SourceLocation LParenLoc,
9188 SourceLocation EndLoc);
9189 /// \brief Called on well-formed 'dist_schedule' clause.
9190 OMPClause *ActOnOpenMPDistScheduleClause(
9191 OpenMPDistScheduleClauseKind Kind, Expr *ChunkSize,
9192 SourceLocation StartLoc, SourceLocation LParenLoc, SourceLocation KindLoc,
9193 SourceLocation CommaLoc, SourceLocation EndLoc);
9194 /// \brief Called on well-formed 'defaultmap' clause.
9195 OMPClause *ActOnOpenMPDefaultmapClause(
9196 OpenMPDefaultmapClauseModifier M, OpenMPDefaultmapClauseKind Kind,
9197 SourceLocation StartLoc, SourceLocation LParenLoc, SourceLocation MLoc,
9198 SourceLocation KindLoc, SourceLocation EndLoc);
9199 /// \brief Called on well-formed 'to' clause.
9200 OMPClause *ActOnOpenMPToClause(ArrayRef<Expr *> VarList,
9201 SourceLocation StartLoc,
9202 SourceLocation LParenLoc,
9203 SourceLocation EndLoc);
9204 /// \brief Called on well-formed 'from' clause.
9205 OMPClause *ActOnOpenMPFromClause(ArrayRef<Expr *> VarList,
9206 SourceLocation StartLoc,
9207 SourceLocation LParenLoc,
9208 SourceLocation EndLoc);
9209 /// Called on well-formed 'use_device_ptr' clause.
9210 OMPClause *ActOnOpenMPUseDevicePtrClause(ArrayRef<Expr *> VarList,
9211 SourceLocation StartLoc,
9212 SourceLocation LParenLoc,
9213 SourceLocation EndLoc);
9214 /// Called on well-formed 'is_device_ptr' clause.
9215 OMPClause *ActOnOpenMPIsDevicePtrClause(ArrayRef<Expr *> VarList,
9216 SourceLocation StartLoc,
9217 SourceLocation LParenLoc,
9218 SourceLocation EndLoc);
9219
9220 /// \brief The kind of conversion being performed.
9221 enum CheckedConversionKind {
9222 /// \brief An implicit conversion.
9223 CCK_ImplicitConversion,
9224 /// \brief A C-style cast.
9225 CCK_CStyleCast,
9226 /// \brief A functional-style cast.
9227 CCK_FunctionalCast,
9228 /// \brief A cast other than a C-style cast.
9229 CCK_OtherCast
9230 };
9231
9232 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit
9233 /// cast. If there is already an implicit cast, merge into the existing one.
9234 /// If isLvalue, the result of the cast is an lvalue.
9235 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK,
9236 ExprValueKind VK = VK_RValue,
9237 const CXXCastPath *BasePath = nullptr,
9238 CheckedConversionKind CCK
9239 = CCK_ImplicitConversion);
9240
9241 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding
9242 /// to the conversion from scalar type ScalarTy to the Boolean type.
9243 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy);
9244
9245 /// IgnoredValueConversions - Given that an expression's result is
9246 /// syntactically ignored, perform any conversions that are
9247 /// required.
9248 ExprResult IgnoredValueConversions(Expr *E);
9249
9250 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts
9251 // functions and arrays to their respective pointers (C99 6.3.2.1).
9252 ExprResult UsualUnaryConversions(Expr *E);
9253
9254 /// CallExprUnaryConversions - a special case of an unary conversion
9255 /// performed on a function designator of a call expression.
9256 ExprResult CallExprUnaryConversions(Expr *E);
9257
9258 // DefaultFunctionArrayConversion - converts functions and arrays
9259 // to their respective pointers (C99 6.3.2.1).
9260 ExprResult DefaultFunctionArrayConversion(Expr *E, bool Diagnose = true);
9261
9262 // DefaultFunctionArrayLvalueConversion - converts functions and
9263 // arrays to their respective pointers and performs the
9264 // lvalue-to-rvalue conversion.
9265 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E,
9266 bool Diagnose = true);
9267
9268 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on
9269 // the operand. This is DefaultFunctionArrayLvalueConversion,
9270 // except that it assumes the operand isn't of function or array
9271 // type.
9272 ExprResult DefaultLvalueConversion(Expr *E);
9273
9274 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that
9275 // do not have a prototype. Integer promotions are performed on each
9276 // argument, and arguments that have type float are promoted to double.
9277 ExprResult DefaultArgumentPromotion(Expr *E);
9278
9279 /// If \p E is a prvalue denoting an unmaterialized temporary, materialize
9280 /// it as an xvalue. In C++98, the result will still be a prvalue, because
9281 /// we don't have xvalues there.
9282 ExprResult TemporaryMaterializationConversion(Expr *E);
9283
9284 // Used for emitting the right warning by DefaultVariadicArgumentPromotion
9285 enum VariadicCallType {
9286 VariadicFunction,
9287 VariadicBlock,
9288 VariadicMethod,
9289 VariadicConstructor,
9290 VariadicDoesNotApply
9291 };
9292
9293 VariadicCallType getVariadicCallType(FunctionDecl *FDecl,
9294 const FunctionProtoType *Proto,
9295 Expr *Fn);
9296
9297 // Used for determining in which context a type is allowed to be passed to a
9298 // vararg function.
9299 enum VarArgKind {
9300 VAK_Valid,
9301 VAK_ValidInCXX11,
9302 VAK_Undefined,
9303 VAK_MSVCUndefined,
9304 VAK_Invalid
9305 };
9306
9307 // Determines which VarArgKind fits an expression.
9308 VarArgKind isValidVarArgType(const QualType &Ty);
9309
9310 /// Check to see if the given expression is a valid argument to a variadic
9311 /// function, issuing a diagnostic if not.
9312 void checkVariadicArgument(const Expr *E, VariadicCallType CT);
9313
9314 /// Check to see if a given expression could have '.c_str()' called on it.
9315 bool hasCStrMethod(const Expr *E);
9316
9317 /// GatherArgumentsForCall - Collector argument expressions for various
9318 /// form of call prototypes.
9319 bool GatherArgumentsForCall(SourceLocation CallLoc, FunctionDecl *FDecl,
9320 const FunctionProtoType *Proto,
9321 unsigned FirstParam, ArrayRef<Expr *> Args,
9322 SmallVectorImpl<Expr *> &AllArgs,
9323 VariadicCallType CallType = VariadicDoesNotApply,
9324 bool AllowExplicit = false,
9325 bool IsListInitialization = false);
9326
9327 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but
9328 // will create a runtime trap if the resulting type is not a POD type.
9329 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT,
9330 FunctionDecl *FDecl);
9331
9332 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's
9333 // operands and then handles various conversions that are common to binary
9334 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this
9335 // routine returns the first non-arithmetic type found. The client is
9336 // responsible for emitting appropriate error diagnostics.
9337 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS,
9338 bool IsCompAssign = false);
9339
9340 /// AssignConvertType - All of the 'assignment' semantic checks return this
9341 /// enum to indicate whether the assignment was allowed. These checks are
9342 /// done for simple assignments, as well as initialization, return from
9343 /// function, argument passing, etc. The query is phrased in terms of a
9344 /// source and destination type.
9345 enum AssignConvertType {
9346 /// Compatible - the types are compatible according to the standard.
9347 Compatible,
9348
9349 /// PointerToInt - The assignment converts a pointer to an int, which we
9350 /// accept as an extension.
9351 PointerToInt,
9352
9353 /// IntToPointer - The assignment converts an int to a pointer, which we
9354 /// accept as an extension.
9355 IntToPointer,
9356
9357 /// FunctionVoidPointer - The assignment is between a function pointer and
9358 /// void*, which the standard doesn't allow, but we accept as an extension.
9359 FunctionVoidPointer,
9360
9361 /// IncompatiblePointer - The assignment is between two pointers types that
9362 /// are not compatible, but we accept them as an extension.
9363 IncompatiblePointer,
9364
9365 /// IncompatiblePointerSign - The assignment is between two pointers types
9366 /// which point to integers which have a different sign, but are otherwise
9367 /// identical. This is a subset of the above, but broken out because it's by
9368 /// far the most common case of incompatible pointers.
9369 IncompatiblePointerSign,
9370
9371 /// CompatiblePointerDiscardsQualifiers - The assignment discards
9372 /// c/v/r qualifiers, which we accept as an extension.
9373 CompatiblePointerDiscardsQualifiers,
9374
9375 /// IncompatiblePointerDiscardsQualifiers - The assignment
9376 /// discards qualifiers that we don't permit to be discarded,
9377 /// like address spaces.
9378 IncompatiblePointerDiscardsQualifiers,
9379
9380 /// IncompatibleNestedPointerQualifiers - The assignment is between two
9381 /// nested pointer types, and the qualifiers other than the first two
9382 /// levels differ e.g. char ** -> const char **, but we accept them as an
9383 /// extension.
9384 IncompatibleNestedPointerQualifiers,
9385
9386 /// IncompatibleVectors - The assignment is between two vector types that
9387 /// have the same size, which we accept as an extension.
9388 IncompatibleVectors,
9389
9390 /// IntToBlockPointer - The assignment converts an int to a block
9391 /// pointer. We disallow this.
9392 IntToBlockPointer,
9393
9394 /// IncompatibleBlockPointer - The assignment is between two block
9395 /// pointers types that are not compatible.
9396 IncompatibleBlockPointer,
9397
9398 /// IncompatibleObjCQualifiedId - The assignment is between a qualified
9399 /// id type and something else (that is incompatible with it). For example,
9400 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol.
9401 IncompatibleObjCQualifiedId,
9402
9403 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an
9404 /// object with __weak qualifier.
9405 IncompatibleObjCWeakRef,
9406
9407 /// Incompatible - We reject this conversion outright, it is invalid to
9408 /// represent it in the AST.
9409 Incompatible
9410 };
9411
9412 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the
9413 /// assignment conversion type specified by ConvTy. This returns true if the
9414 /// conversion was invalid or false if the conversion was accepted.
9415 bool DiagnoseAssignmentResult(AssignConvertType ConvTy,
9416 SourceLocation Loc,
9417 QualType DstType, QualType SrcType,
9418 Expr *SrcExpr, AssignmentAction Action,
9419 bool *Complained = nullptr);
9420
9421 /// IsValueInFlagEnum - Determine if a value is allowed as part of a flag
9422 /// enum. If AllowMask is true, then we also allow the complement of a valid
9423 /// value, to be used as a mask.
9424 bool IsValueInFlagEnum(const EnumDecl *ED, const llvm::APInt &Val,
9425 bool AllowMask) const;
9426
9427 /// DiagnoseAssignmentEnum - Warn if assignment to enum is a constant
9428 /// integer not in the range of enum values.
9429 void DiagnoseAssignmentEnum(QualType DstType, QualType SrcType,
9430 Expr *SrcExpr);
9431
9432 /// CheckAssignmentConstraints - Perform type checking for assignment,
9433 /// argument passing, variable initialization, and function return values.
9434 /// C99 6.5.16.
9435 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc,
9436 QualType LHSType,
9437 QualType RHSType);
9438
9439 /// Check assignment constraints and optionally prepare for a conversion of
9440 /// the RHS to the LHS type. The conversion is prepared for if ConvertRHS
9441 /// is true.
9442 AssignConvertType CheckAssignmentConstraints(QualType LHSType,
9443 ExprResult &RHS,
9444 CastKind &Kind,
9445 bool ConvertRHS = true);
9446
9447 /// Check assignment constraints for an assignment of RHS to LHSType.
9448 ///
9449 /// \param LHSType The destination type for the assignment.
9450 /// \param RHS The source expression for the assignment.
9451 /// \param Diagnose If \c true, diagnostics may be produced when checking
9452 /// for assignability. If a diagnostic is produced, \p RHS will be
9453 /// set to ExprError(). Note that this function may still return
9454 /// without producing a diagnostic, even for an invalid assignment.
9455 /// \param DiagnoseCFAudited If \c true, the target is a function parameter
9456 /// in an audited Core Foundation API and does not need to be checked
9457 /// for ARC retain issues.
9458 /// \param ConvertRHS If \c true, \p RHS will be updated to model the
9459 /// conversions necessary to perform the assignment. If \c false,
9460 /// \p Diagnose must also be \c false.
9461 AssignConvertType CheckSingleAssignmentConstraints(
9462 QualType LHSType, ExprResult &RHS, bool Diagnose = true,
9463 bool DiagnoseCFAudited = false, bool ConvertRHS = true);
9464
9465 // \brief If the lhs type is a transparent union, check whether we
9466 // can initialize the transparent union with the given expression.
9467 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType,
9468 ExprResult &RHS);
9469
9470 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType);
9471
9472 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType);
9473
9474 ExprResult PerformImplicitConversion(Expr *From, QualType ToType,
9475 AssignmentAction Action,
9476 bool AllowExplicit = false);
9477 ExprResult PerformImplicitConversion(Expr *From, QualType ToType,
9478 AssignmentAction Action,
9479 bool AllowExplicit,
9480 ImplicitConversionSequence& ICS);
9481 ExprResult PerformImplicitConversion(Expr *From, QualType ToType,
9482 const ImplicitConversionSequence& ICS,
9483 AssignmentAction Action,
9484 CheckedConversionKind CCK
9485 = CCK_ImplicitConversion);
9486 ExprResult PerformImplicitConversion(Expr *From, QualType ToType,
9487 const StandardConversionSequence& SCS,
9488 AssignmentAction Action,
9489 CheckedConversionKind CCK);
9490
9491 /// the following "Check" methods will return a valid/converted QualType
9492 /// or a null QualType (indicating an error diagnostic was issued).
9493
9494 /// type checking binary operators (subroutines of CreateBuiltinBinOp).
9495 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS,
9496 ExprResult &RHS);
9497 QualType InvalidLogicalVectorOperands(SourceLocation Loc, ExprResult &LHS,
9498 ExprResult &RHS);
9499 QualType CheckPointerToMemberOperands( // C++ 5.5
9500 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK,
9501 SourceLocation OpLoc, bool isIndirect);
9502 QualType CheckMultiplyDivideOperands( // C99 6.5.5
9503 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign,
9504 bool IsDivide);
9505 QualType CheckRemainderOperands( // C99 6.5.5
9506 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc,
9507 bool IsCompAssign = false);
9508 QualType CheckAdditionOperands( // C99 6.5.6
9509 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc,
9510 BinaryOperatorKind Opc, QualType* CompLHSTy = nullptr);
9511 QualType CheckSubtractionOperands( // C99 6.5.6
9512 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc,
9513 QualType* CompLHSTy = nullptr);
9514 QualType CheckShiftOperands( // C99 6.5.7
9515 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc,
9516 BinaryOperatorKind Opc, bool IsCompAssign = false);
9517 QualType CheckCompareOperands( // C99 6.5.8/9
9518 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc,
9519 BinaryOperatorKind Opc, bool isRelational);
9520 QualType CheckBitwiseOperands( // C99 6.5.[10...12]
9521 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc,
9522 BinaryOperatorKind Opc);
9523 QualType CheckLogicalOperands( // C99 6.5.[13,14]
9524 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc,
9525 BinaryOperatorKind Opc);
9526 // CheckAssignmentOperands is used for both simple and compound assignment.
9527 // For simple assignment, pass both expressions and a null converted type.
9528 // For compound assignment, pass both expressions and the converted type.
9529 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2]
9530 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType);
9531
9532 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc,
9533 UnaryOperatorKind Opcode, Expr *Op);
9534 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc,
9535 BinaryOperatorKind Opcode,
9536 Expr *LHS, Expr *RHS);
9537 ExprResult checkPseudoObjectRValue(Expr *E);
9538 Expr *recreateSyntacticForm(PseudoObjectExpr *E);
9539
9540 QualType CheckConditionalOperands( // C99 6.5.15
9541 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS,
9542 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc);
9543 QualType CXXCheckConditionalOperands( // C++ 5.16
9544 ExprResult &cond, ExprResult &lhs, ExprResult &rhs,
9545 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc);
9546 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2,
9547 bool ConvertArgs = true);
9548 QualType FindCompositePointerType(SourceLocation Loc,
9549 ExprResult &E1, ExprResult &E2,
9550 bool ConvertArgs = true) {
9551 Expr *E1Tmp = E1.get(), *E2Tmp = E2.get();
9552 QualType Composite =
9553 FindCompositePointerType(Loc, E1Tmp, E2Tmp, ConvertArgs);
9554 E1 = E1Tmp;
9555 E2 = E2Tmp;
9556 return Composite;
9557 }
9558
9559 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS,
9560 SourceLocation QuestionLoc);
9561
9562 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr,
9563 SourceLocation QuestionLoc);
9564
9565 void DiagnoseAlwaysNonNullPointer(Expr *E,
9566 Expr::NullPointerConstantKind NullType,
9567 bool IsEqual, SourceRange Range);
9568
9569 /// type checking for vector binary operators.
9570 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS,
9571 SourceLocation Loc, bool IsCompAssign,
9572 bool AllowBothBool, bool AllowBoolConversion);
9573 QualType GetSignedVectorType(QualType V);
9574 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS,
9575 SourceLocation Loc, bool isRelational);
9576 QualType CheckVectorLogicalOperands(ExprResult &LHS, ExprResult &RHS,
9577 SourceLocation Loc);
9578
9579 bool areLaxCompatibleVectorTypes(QualType srcType, QualType destType);
9580 bool isLaxVectorConversion(QualType srcType, QualType destType);
9581
9582 /// type checking declaration initializers (C99 6.7.8)
9583 bool CheckForConstantInitializer(Expr *e, QualType t);
9584
9585 // type checking C++ declaration initializers (C++ [dcl.init]).
9586
9587 /// ReferenceCompareResult - Expresses the result of comparing two
9588 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the
9589 /// purposes of initialization by reference (C++ [dcl.init.ref]p4).
9590 enum ReferenceCompareResult {
9591 /// Ref_Incompatible - The two types are incompatible, so direct
9592 /// reference binding is not possible.
9593 Ref_Incompatible = 0,
9594 /// Ref_Related - The two types are reference-related, which means
9595 /// that their unqualified forms (T1 and T2) are either the same
9596 /// or T1 is a base class of T2.
9597 Ref_Related,
9598 /// Ref_Compatible - The two types are reference-compatible.
9599 Ref_Compatible
9600 };
9601
9602 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc,
9603 QualType T1, QualType T2,
9604 bool &DerivedToBase,
9605 bool &ObjCConversion,
9606 bool &ObjCLifetimeConversion);
9607
9608 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType,
9609 Expr *CastExpr, CastKind &CastKind,
9610 ExprValueKind &VK, CXXCastPath &Path);
9611
9612 /// \brief Force an expression with unknown-type to an expression of the
9613 /// given type.
9614 ExprResult forceUnknownAnyToType(Expr *E, QualType ToType);
9615
9616 /// \brief Type-check an expression that's being passed to an
9617 /// __unknown_anytype parameter.
9618 ExprResult checkUnknownAnyArg(SourceLocation callLoc,
9619 Expr *result, QualType &paramType);
9620
9621 // CheckVectorCast - check type constraints for vectors.
9622 // Since vectors are an extension, there are no C standard reference for this.
9623 // We allow casting between vectors and integer datatypes of the same size.
9624 // returns true if the cast is invalid
9625 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty,
9626 CastKind &Kind);
9627
9628 /// \brief Prepare `SplattedExpr` for a vector splat operation, adding
9629 /// implicit casts if necessary.
9630 ExprResult prepareVectorSplat(QualType VectorTy, Expr *SplattedExpr);
9631
9632 // CheckExtVectorCast - check type constraints for extended vectors.
9633 // Since vectors are an extension, there are no C standard reference for this.
9634 // We allow casting between vectors and integer datatypes of the same size,
9635 // or vectors and the element type of that vector.
9636 // returns the cast expr
9637 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr,
9638 CastKind &Kind);
9639
9640 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, QualType Type,
9641 SourceLocation LParenLoc,
9642 Expr *CastExpr,
9643 SourceLocation RParenLoc);
9644
9645 enum ARCConversionResult { ACR_okay, ACR_unbridged, ACR_error };
9646
9647 /// \brief Checks for invalid conversions and casts between
9648 /// retainable pointers and other pointer kinds for ARC and Weak.
9649 ARCConversionResult CheckObjCConversion(SourceRange castRange,
9650 QualType castType, Expr *&op,
9651 CheckedConversionKind CCK,
9652 bool Diagnose = true,
9653 bool DiagnoseCFAudited = false,
9654 BinaryOperatorKind Opc = BO_PtrMemD
9655 );
9656
9657 Expr *stripARCUnbridgedCast(Expr *e);
9658 void diagnoseARCUnbridgedCast(Expr *e);
9659
9660 bool CheckObjCARCUnavailableWeakConversion(QualType castType,
9661 QualType ExprType);
9662
9663 /// checkRetainCycles - Check whether an Objective-C message send
9664 /// might create an obvious retain cycle.
9665 void checkRetainCycles(ObjCMessageExpr *msg);
9666 void checkRetainCycles(Expr *receiver, Expr *argument);
9667 void checkRetainCycles(VarDecl *Var, Expr *Init);
9668
9669 /// checkUnsafeAssigns - Check whether +1 expr is being assigned
9670 /// to weak/__unsafe_unretained type.
9671 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS);
9672
9673 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned
9674 /// to weak/__unsafe_unretained expression.
9675 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS);
9676
9677 /// CheckMessageArgumentTypes - Check types in an Obj-C message send.
9678 /// \param Method - May be null.
9679 /// \param [out] ReturnType - The return type of the send.
9680 /// \return true iff there were any incompatible types.
9681 bool CheckMessageArgumentTypes(QualType ReceiverType,
9682 MultiExprArg Args, Selector Sel,
9683 ArrayRef<SourceLocation> SelectorLocs,
9684 ObjCMethodDecl *Method, bool isClassMessage,
9685 bool isSuperMessage,
9686 SourceLocation lbrac, SourceLocation rbrac,
9687 SourceRange RecRange,
9688 QualType &ReturnType, ExprValueKind &VK);
9689
9690 /// \brief Determine the result of a message send expression based on
9691 /// the type of the receiver, the method expected to receive the message,
9692 /// and the form of the message send.
9693 QualType getMessageSendResultType(QualType ReceiverType,
9694 ObjCMethodDecl *Method,
9695 bool isClassMessage, bool isSuperMessage);
9696
9697 /// \brief If the given expression involves a message send to a method
9698 /// with a related result type, emit a note describing what happened.
9699 void EmitRelatedResultTypeNote(const Expr *E);
9700
9701 /// \brief Given that we had incompatible pointer types in a return
9702 /// statement, check whether we're in a method with a related result
9703 /// type, and if so, emit a note describing what happened.
9704 void EmitRelatedResultTypeNoteForReturn(QualType destType);
9705
9706 class ConditionResult {
9707 Decl *ConditionVar;
9708 FullExprArg Condition;
9709 bool Invalid;
9710 bool HasKnownValue;
9711 bool KnownValue;
9712
9713 friend class Sema;
9714 ConditionResult(Sema &S, Decl *ConditionVar, FullExprArg Condition,
9715 bool IsConstexpr)
9716 : ConditionVar(ConditionVar), Condition(Condition), Invalid(false),
9717 HasKnownValue(IsConstexpr && Condition.get() &&
9718 !Condition.get()->isValueDependent()),
9719 KnownValue(HasKnownValue &&
9720 !!Condition.get()->EvaluateKnownConstInt(S.Context)) {}
9721 explicit ConditionResult(bool Invalid)
9722 : ConditionVar(nullptr), Condition(nullptr), Invalid(Invalid),
9723 HasKnownValue(false), KnownValue(false) {}
9724
9725 public:
9726 ConditionResult() : ConditionResult(false) {}
9727 bool isInvalid() const { return Invalid; }
9728 std::pair<VarDecl *, Expr *> get() const {
9729 return std::make_pair(cast_or_null<VarDecl>(ConditionVar),
9730 Condition.get());
9731 }
9732 llvm::Optional<bool> getKnownValue() const {
9733 if (!HasKnownValue)
9734 return None;
9735 return KnownValue;
9736 }
9737 };
9738 static ConditionResult ConditionError() { return ConditionResult(true); }
9739
9740 enum class ConditionKind {
9741 Boolean, ///< A boolean condition, from 'if', 'while', 'for', or 'do'.
9742 ConstexprIf, ///< A constant boolean condition from 'if constexpr'.
9743 Switch ///< An integral condition for a 'switch' statement.
9744 };
9745
9746 ConditionResult ActOnCondition(Scope *S, SourceLocation Loc,
9747 Expr *SubExpr, ConditionKind CK);
9748
9749 ConditionResult ActOnConditionVariable(Decl *ConditionVar,
9750 SourceLocation StmtLoc,
9751 ConditionKind CK);
9752
9753 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D);
9754
9755 ExprResult CheckConditionVariable(VarDecl *ConditionVar,
9756 SourceLocation StmtLoc,
9757 ConditionKind CK);
9758 ExprResult CheckSwitchCondition(SourceLocation SwitchLoc, Expr *Cond);
9759
9760 /// CheckBooleanCondition - Diagnose problems involving the use of
9761 /// the given expression as a boolean condition (e.g. in an if
9762 /// statement). Also performs the standard function and array
9763 /// decays, possibly changing the input variable.
9764 ///
9765 /// \param Loc - A location associated with the condition, e.g. the
9766 /// 'if' keyword.
9767 /// \return true iff there were any errors
9768 ExprResult CheckBooleanCondition(SourceLocation Loc, Expr *E,
9769 bool IsConstexpr = false);
9770
9771 /// DiagnoseAssignmentAsCondition - Given that an expression is
9772 /// being used as a boolean condition, warn if it's an assignment.
9773 void DiagnoseAssignmentAsCondition(Expr *E);
9774
9775 /// \brief Redundant parentheses over an equality comparison can indicate
9776 /// that the user intended an assignment used as condition.
9777 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE);
9778
9779 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid.
9780 ExprResult CheckCXXBooleanCondition(Expr *CondExpr, bool IsConstexpr = false);
9781
9782 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have
9783 /// the specified width and sign. If an overflow occurs, detect it and emit
9784 /// the specified diagnostic.
9785 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal,
9786 unsigned NewWidth, bool NewSign,
9787 SourceLocation Loc, unsigned DiagID);
9788
9789 /// Checks that the Objective-C declaration is declared in the global scope.
9790 /// Emits an error and marks the declaration as invalid if it's not declared
9791 /// in the global scope.
9792 bool CheckObjCDeclScope(Decl *D);
9793
9794 /// \brief Abstract base class used for diagnosing integer constant
9795 /// expression violations.
9796 class VerifyICEDiagnoser {
9797 public:
9798 bool Suppress;
9799
9800 VerifyICEDiagnoser(bool Suppress = false) : Suppress(Suppress) { }
9801
9802 virtual void diagnoseNotICE(Sema &S, SourceLocation Loc, SourceRange SR) =0;
9803 virtual void diagnoseFold(Sema &S, SourceLocation Loc, SourceRange SR);
9804 virtual ~VerifyICEDiagnoser() { }
9805 };
9806
9807 /// VerifyIntegerConstantExpression - Verifies that an expression is an ICE,
9808 /// and reports the appropriate diagnostics. Returns false on success.
9809 /// Can optionally return the value of the expression.
9810 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result,
9811 VerifyICEDiagnoser &Diagnoser,
9812 bool AllowFold = true);
9813 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result,
9814 unsigned DiagID,
9815 bool AllowFold = true);
9816 ExprResult VerifyIntegerConstantExpression(Expr *E,
9817 llvm::APSInt *Result = nullptr);
9818
9819 /// VerifyBitField - verifies that a bit field expression is an ICE and has
9820 /// the correct width, and that the field type is valid.
9821 /// Returns false on success.
9822 /// Can optionally return whether the bit-field is of width 0
9823 ExprResult VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName,
9824 QualType FieldTy, bool IsMsStruct,
9825 Expr *BitWidth, bool *ZeroWidth = nullptr);
9826
9827private:
9828 unsigned ForceCUDAHostDeviceDepth = 0;
9829
9830public:
9831 /// Increments our count of the number of times we've seen a pragma forcing
9832 /// functions to be __host__ __device__. So long as this count is greater
9833 /// than zero, all functions encountered will be __host__ __device__.
9834 void PushForceCUDAHostDevice();
9835
9836 /// Decrements our count of the number of times we've seen a pragma forcing
9837 /// functions to be __host__ __device__. Returns false if the count is 0
9838 /// before incrementing, so you can emit an error.
9839 bool PopForceCUDAHostDevice();
9840
9841 /// Diagnostics that are emitted only if we discover that the given function
9842 /// must be codegen'ed. Because handling these correctly adds overhead to
9843 /// compilation, this is currently only enabled for CUDA compilations.
9844 llvm::DenseMap<CanonicalDeclPtr<FunctionDecl>,
9845 std::vector<PartialDiagnosticAt>>
9846 CUDADeferredDiags;
9847
9848 /// A pair of a canonical FunctionDecl and a SourceLocation. When used as the
9849 /// key in a hashtable, both the FD and location are hashed.
9850 struct FunctionDeclAndLoc {
9851 CanonicalDeclPtr<FunctionDecl> FD;
9852 SourceLocation Loc;
9853 };
9854
9855 /// FunctionDecls and SourceLocations for which CheckCUDACall has emitted a
9856 /// (maybe deferred) "bad call" diagnostic. We use this to avoid emitting the
9857 /// same deferred diag twice.
9858 llvm::DenseSet<FunctionDeclAndLoc> LocsWithCUDACallDiags;
9859
9860 /// An inverse call graph, mapping known-emitted functions to one of their
9861 /// known-emitted callers (plus the location of the call).
9862 ///
9863 /// Functions that we can tell a priori must be emitted aren't added to this
9864 /// map.
9865 llvm::DenseMap</* Callee = */ CanonicalDeclPtr<FunctionDecl>,
9866 /* Caller = */ FunctionDeclAndLoc>
9867 CUDAKnownEmittedFns;
9868
9869 /// A partial call graph maintained during CUDA compilation to support
9870 /// deferred diagnostics.
9871 ///
9872 /// Functions are only added here if, at the time they're considered, they are
9873 /// not known-emitted. As soon as we discover that a function is
9874 /// known-emitted, we remove it and everything it transitively calls from this
9875 /// set and add those functions to CUDAKnownEmittedFns.
9876 llvm::DenseMap</* Caller = */ CanonicalDeclPtr<FunctionDecl>,
9877 /* Callees = */ llvm::MapVector<CanonicalDeclPtr<FunctionDecl>,
9878 SourceLocation>>
9879 CUDACallGraph;
9880
9881 /// Diagnostic builder for CUDA errors which may or may not be deferred.
9882 ///
9883 /// In CUDA, there exist constructs (e.g. variable-length arrays, try/catch)
9884 /// which are not allowed to appear inside __device__ functions and are
9885 /// allowed to appear in __host__ __device__ functions only if the host+device
9886 /// function is never codegen'ed.
9887 ///
9888 /// To handle this, we use the notion of "deferred diagnostics", where we
9889 /// attach a diagnostic to a FunctionDecl that's emitted iff it's codegen'ed.
9890 ///
9891 /// This class lets you emit either a regular diagnostic, a deferred
9892 /// diagnostic, or no diagnostic at all, according to an argument you pass to
9893 /// its constructor, thus simplifying the process of creating these "maybe
9894 /// deferred" diagnostics.
9895 class CUDADiagBuilder {
9896 public:
9897 enum Kind {
9898 /// Emit no diagnostics.
9899 K_Nop,
9900 /// Emit the diagnostic immediately (i.e., behave like Sema::Diag()).
9901 K_Immediate,
9902 /// Emit the diagnostic immediately, and, if it's a warning or error, also
9903 /// emit a call stack showing how this function can be reached by an a
9904 /// priori known-emitted function.
9905 K_ImmediateWithCallStack,
9906 /// Create a deferred diagnostic, which is emitted only if the function
9907 /// it's attached to is codegen'ed. Also emit a call stack as with
9908 /// K_ImmediateWithCallStack.
9909 K_Deferred
9910 };
9911
9912 CUDADiagBuilder(Kind K, SourceLocation Loc, unsigned DiagID,
9913 FunctionDecl *Fn, Sema &S);
9914 ~CUDADiagBuilder();
9915
9916 /// Convertible to bool: True if we immediately emitted an error, false if
9917 /// we didn't emit an error or we created a deferred error.
9918 ///
9919 /// Example usage:
9920 ///
9921 /// if (CUDADiagBuilder(...) << foo << bar)
9922 /// return ExprError();
9923 ///
9924 /// But see CUDADiagIfDeviceCode() and CUDADiagIfHostCode() -- you probably
9925 /// want to use these instead of creating a CUDADiagBuilder yourself.
9926 operator bool() const { return ImmediateDiag.hasValue(); }
9927
9928 template <typename T>
9929 friend const CUDADiagBuilder &operator<<(const CUDADiagBuilder &Diag,
9930 const T &Value) {
9931 if (Diag.ImmediateDiag.hasValue())
9932 *Diag.ImmediateDiag << Value;
9933 else if (Diag.PartialDiag.hasValue())
9934 *Diag.PartialDiag << Value;
9935 return Diag;
9936 }
9937
9938 private:
9939 Sema &S;
9940 SourceLocation Loc;
9941 unsigned DiagID;
9942 FunctionDecl *Fn;
9943 bool ShowCallStack;
9944
9945 // Invariant: At most one of these Optionals has a value.
9946 // FIXME: Switch these to a Variant once that exists.
9947 llvm::Optional<SemaDiagnosticBuilder> ImmediateDiag;
9948 llvm::Optional<PartialDiagnostic> PartialDiag;
9949 };
9950
9951 /// Creates a CUDADiagBuilder that emits the diagnostic if the current context
9952 /// is "used as device code".
9953 ///
9954 /// - If CurContext is a __host__ function, does not emit any diagnostics.
9955 /// - If CurContext is a __device__ or __global__ function, emits the
9956 /// diagnostics immediately.
9957 /// - If CurContext is a __host__ __device__ function and we are compiling for
9958 /// the device, creates a diagnostic which is emitted if and when we realize
9959 /// that the function will be codegen'ed.
9960 ///
9961 /// Example usage:
9962 ///
9963 /// // Variable-length arrays are not allowed in CUDA device code.
9964 /// if (CUDADiagIfDeviceCode(Loc, diag::err_cuda_vla) << CurrentCUDATarget())
9965 /// return ExprError();
9966 /// // Otherwise, continue parsing as normal.
9967 CUDADiagBuilder CUDADiagIfDeviceCode(SourceLocation Loc, unsigned DiagID);
9968
9969 /// Creates a CUDADiagBuilder that emits the diagnostic if the current context
9970 /// is "used as host code".
9971 ///
9972 /// Same as CUDADiagIfDeviceCode, with "host" and "device" switched.
9973 CUDADiagBuilder CUDADiagIfHostCode(SourceLocation Loc, unsigned DiagID);
9974
9975 enum CUDAFunctionTarget {
9976 CFT_Device,
9977 CFT_Global,
9978 CFT_Host,
9979 CFT_HostDevice,
9980 CFT_InvalidTarget
9981 };
9982
9983 /// Determines whether the given function is a CUDA device/host/kernel/etc.
9984 /// function.
9985 ///
9986 /// Use this rather than examining the function's attributes yourself -- you
9987 /// will get it wrong. Returns CFT_Host if D is null.
9988 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D,
9989 bool IgnoreImplicitHDAttr = false);
9990 CUDAFunctionTarget IdentifyCUDATarget(const AttributeList *Attr);
9991
9992 /// Gets the CUDA target for the current context.
9993 CUDAFunctionTarget CurrentCUDATarget() {
9994 return IdentifyCUDATarget(dyn_cast<FunctionDecl>(CurContext));
9995 }
9996
9997 // CUDA function call preference. Must be ordered numerically from
9998 // worst to best.
9999 enum CUDAFunctionPreference {
10000 CFP_Never, // Invalid caller/callee combination.
10001 CFP_WrongSide, // Calls from host-device to host or device
10002 // function that do not match current compilation
10003 // mode.
10004 CFP_HostDevice, // Any calls to host/device functions.
10005 CFP_SameSide, // Calls from host-device to host or device
10006 // function matching current compilation mode.
10007 CFP_Native, // host-to-host or device-to-device calls.
10008 };
10009
10010 /// Identifies relative preference of a given Caller/Callee
10011 /// combination, based on their host/device attributes.
10012 /// \param Caller function which needs address of \p Callee.
10013 /// nullptr in case of global context.
10014 /// \param Callee target function
10015 ///
10016 /// \returns preference value for particular Caller/Callee combination.
10017 CUDAFunctionPreference IdentifyCUDAPreference(const FunctionDecl *Caller,
10018 const FunctionDecl *Callee);
10019
10020 /// Determines whether Caller may invoke Callee, based on their CUDA
10021 /// host/device attributes. Returns false if the call is not allowed.
10022 ///
10023 /// Note: Will return true for CFP_WrongSide calls. These may appear in
10024 /// semantically correct CUDA programs, but only if they're never codegen'ed.
10025 bool IsAllowedCUDACall(const FunctionDecl *Caller,
10026 const FunctionDecl *Callee) {
10027 return IdentifyCUDAPreference(Caller, Callee) != CFP_Never;
10028 }
10029
10030 /// May add implicit CUDAHostAttr and CUDADeviceAttr attributes to FD,
10031 /// depending on FD and the current compilation settings.
10032 void maybeAddCUDAHostDeviceAttrs(FunctionDecl *FD,
10033 const LookupResult &Previous);
10034
10035public:
10036 /// Check whether we're allowed to call Callee from the current context.
10037 ///
10038 /// - If the call is never allowed in a semantically-correct program
10039 /// (CFP_Never), emits an error and returns false.
10040 ///
10041 /// - If the call is allowed in semantically-correct programs, but only if
10042 /// it's never codegen'ed (CFP_WrongSide), creates a deferred diagnostic to
10043 /// be emitted if and when the caller is codegen'ed, and returns true.
10044 ///
10045 /// Will only create deferred diagnostics for a given SourceLocation once,
10046 /// so you can safely call this multiple times without generating duplicate
10047 /// deferred errors.
10048 ///
10049 /// - Otherwise, returns true without emitting any diagnostics.
10050 bool CheckCUDACall(SourceLocation Loc, FunctionDecl *Callee);
10051
10052 /// Set __device__ or __host__ __device__ attributes on the given lambda
10053 /// operator() method.
10054 ///
10055 /// CUDA lambdas declared inside __device__ or __global__ functions inherit
10056 /// the __device__ attribute. Similarly, lambdas inside __host__ __device__
10057 /// functions become __host__ __device__ themselves.
10058 void CUDASetLambdaAttrs(CXXMethodDecl *Method);
10059
10060 /// Finds a function in \p Matches with highest calling priority
10061 /// from \p Caller context and erases all functions with lower
10062 /// calling priority.
10063 void EraseUnwantedCUDAMatches(
10064 const FunctionDecl *Caller,
10065 SmallVectorImpl<std::pair<DeclAccessPair, FunctionDecl *>> &Matches);
10066
10067 /// Given a implicit special member, infer its CUDA target from the
10068 /// calls it needs to make to underlying base/field special members.
10069 /// \param ClassDecl the class for which the member is being created.
10070 /// \param CSM the kind of special member.
10071 /// \param MemberDecl the special member itself.
10072 /// \param ConstRHS true if this is a copy operation with a const object on
10073 /// its RHS.
10074 /// \param Diagnose true if this call should emit diagnostics.
10075 /// \return true if there was an error inferring.
10076 /// The result of this call is implicit CUDA target attribute(s) attached to
10077 /// the member declaration.
10078 bool inferCUDATargetForImplicitSpecialMember(CXXRecordDecl *ClassDecl,
10079 CXXSpecialMember CSM,
10080 CXXMethodDecl *MemberDecl,
10081 bool ConstRHS,
10082 bool Diagnose);
10083
10084 /// \return true if \p CD can be considered empty according to CUDA
10085 /// (E.2.3.1 in CUDA 7.5 Programming guide).
10086 bool isEmptyCudaConstructor(SourceLocation Loc, CXXConstructorDecl *CD);
10087 bool isEmptyCudaDestructor(SourceLocation Loc, CXXDestructorDecl *CD);
10088
10089 /// Check whether NewFD is a valid overload for CUDA. Emits
10090 /// diagnostics and invalidates NewFD if not.
10091 void checkCUDATargetOverload(FunctionDecl *NewFD,
10092 const LookupResult &Previous);
10093 /// Copies target attributes from the template TD to the function FD.
10094 void inheritCUDATargetAttrs(FunctionDecl *FD, const FunctionTemplateDecl &TD);
10095
10096 /// \name Code completion
10097 //@{
10098 /// \brief Describes the context in which code completion occurs.
10099 enum ParserCompletionContext {
10100 /// \brief Code completion occurs at top-level or namespace context.
10101 PCC_Namespace,
10102 /// \brief Code completion occurs within a class, struct, or union.
10103 PCC_Class,
10104 /// \brief Code completion occurs within an Objective-C interface, protocol,
10105 /// or category.
10106 PCC_ObjCInterface,
10107 /// \brief Code completion occurs within an Objective-C implementation or
10108 /// category implementation
10109 PCC_ObjCImplementation,
10110 /// \brief Code completion occurs within the list of instance variables
10111 /// in an Objective-C interface, protocol, category, or implementation.
10112 PCC_ObjCInstanceVariableList,
10113 /// \brief Code completion occurs following one or more template
10114 /// headers.
10115 PCC_Template,
10116 /// \brief Code completion occurs following one or more template
10117 /// headers within a class.
10118 PCC_MemberTemplate,
10119 /// \brief Code completion occurs within an expression.
10120 PCC_Expression,
10121 /// \brief Code completion occurs within a statement, which may
10122 /// also be an expression or a declaration.
10123 PCC_Statement,
10124 /// \brief Code completion occurs at the beginning of the
10125 /// initialization statement (or expression) in a for loop.
10126 PCC_ForInit,
10127 /// \brief Code completion occurs within the condition of an if,
10128 /// while, switch, or for statement.
10129 PCC_Condition,
10130 /// \brief Code completion occurs within the body of a function on a
10131 /// recovery path, where we do not have a specific handle on our position
10132 /// in the grammar.
10133 PCC_RecoveryInFunction,
10134 /// \brief Code completion occurs where only a type is permitted.
10135 PCC_Type,
10136 /// \brief Code completion occurs in a parenthesized expression, which
10137 /// might also be a type cast.
10138 PCC_ParenthesizedExpression,
10139 /// \brief Code completion occurs within a sequence of declaration
10140 /// specifiers within a function, method, or block.
10141 PCC_LocalDeclarationSpecifiers
10142 };
10143
10144 void CodeCompleteModuleImport(SourceLocation ImportLoc, ModuleIdPath Path);
10145 void CodeCompleteOrdinaryName(Scope *S,
10146 ParserCompletionContext CompletionContext);
10147 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS,
10148 bool AllowNonIdentifiers,
10149 bool AllowNestedNameSpecifiers);
10150
10151 struct CodeCompleteExpressionData;
10152 void CodeCompleteExpression(Scope *S,
10153 const CodeCompleteExpressionData &Data);
10154 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base,
10155 SourceLocation OpLoc, bool IsArrow,
10156 bool IsBaseExprStatement);
10157 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS);
10158 void CodeCompleteTag(Scope *S, unsigned TagSpec);
10159 void CodeCompleteTypeQualifiers(DeclSpec &DS);
10160 void CodeCompleteFunctionQualifiers(DeclSpec &DS, Declarator &D,
10161 const VirtSpecifiers *VS = nullptr);
10162 void CodeCompleteBracketDeclarator(Scope *S);
10163 void CodeCompleteCase(Scope *S);
10164 void CodeCompleteCall(Scope *S, Expr *Fn, ArrayRef<Expr *> Args);
10165 void CodeCompleteConstructor(Scope *S, QualType Type, SourceLocation Loc,
10166 ArrayRef<Expr *> Args);
10167 void CodeCompleteInitializer(Scope *S, Decl *D);
10168 void CodeCompleteReturn(Scope *S);
10169 void CodeCompleteAfterIf(Scope *S);
10170 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS);
10171
10172 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS,
10173 bool EnteringContext);
10174 void CodeCompleteUsing(Scope *S);
10175 void CodeCompleteUsingDirective(Scope *S);
10176 void CodeCompleteNamespaceDecl(Scope *S);
10177 void CodeCompleteNamespaceAliasDecl(Scope *S);
10178 void CodeCompleteOperatorName(Scope *S);
10179 void CodeCompleteConstructorInitializer(
10180 Decl *Constructor,
10181 ArrayRef<CXXCtorInitializer *> Initializers);
10182
10183 void CodeCompleteLambdaIntroducer(Scope *S, LambdaIntroducer &Intro,
10184 bool AfterAmpersand);
10185
10186 void CodeCompleteObjCAtDirective(Scope *S);
10187 void CodeCompleteObjCAtVisibility(Scope *S);
10188 void CodeCompleteObjCAtStatement(Scope *S);
10189 void CodeCompleteObjCAtExpression(Scope *S);
10190 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS);
10191 void CodeCompleteObjCPropertyGetter(Scope *S);
10192 void CodeCompleteObjCPropertySetter(Scope *S);
10193 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS,
10194 bool IsParameter);
10195 void CodeCompleteObjCMessageReceiver(Scope *S);
10196 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc,
10197 ArrayRef<IdentifierInfo *> SelIdents,
10198 bool AtArgumentExpression);
10199 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver,
10200 ArrayRef<IdentifierInfo *> SelIdents,
10201 bool AtArgumentExpression,
10202 bool IsSuper = false);
10203 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver,
10204 ArrayRef<IdentifierInfo *> SelIdents,
10205 bool AtArgumentExpression,
10206 ObjCInterfaceDecl *Super = nullptr);
10207 void CodeCompleteObjCForCollection(Scope *S,
10208 DeclGroupPtrTy IterationVar);
10209 void CodeCompleteObjCSelector(Scope *S,
10210 ArrayRef<IdentifierInfo *> SelIdents);
10211 void CodeCompleteObjCProtocolReferences(
10212 ArrayRef<IdentifierLocPair> Protocols);
10213 void CodeCompleteObjCProtocolDecl(Scope *S);
10214 void CodeCompleteObjCInterfaceDecl(Scope *S);
10215 void CodeCompleteObjCSuperclass(Scope *S,
10216 IdentifierInfo *ClassName,
10217 SourceLocation ClassNameLoc);
10218 void CodeCompleteObjCImplementationDecl(Scope *S);
10219 void CodeCompleteObjCInterfaceCategory(Scope *S,
10220 IdentifierInfo *ClassName,
10221 SourceLocation ClassNameLoc);
10222 void CodeCompleteObjCImplementationCategory(Scope *S,
10223 IdentifierInfo *ClassName,
10224 SourceLocation ClassNameLoc);
10225 void CodeCompleteObjCPropertyDefinition(Scope *S);
10226 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S,
10227 IdentifierInfo *PropertyName);
10228 void CodeCompleteObjCMethodDecl(Scope *S, Optional<bool> IsInstanceMethod,
10229 ParsedType ReturnType);
10230 void CodeCompleteObjCMethodDeclSelector(Scope *S,
10231 bool IsInstanceMethod,
10232 bool AtParameterName,
10233 ParsedType ReturnType,
10234 ArrayRef<IdentifierInfo *> SelIdents);
10235 void CodeCompleteObjCClassPropertyRefExpr(Scope *S, IdentifierInfo &ClassName,
10236 SourceLocation ClassNameLoc,
10237 bool IsBaseExprStatement);
10238 void CodeCompletePreprocessorDirective(bool InConditional);
10239 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S);
10240 void CodeCompletePreprocessorMacroName(bool IsDefinition);
10241 void CodeCompletePreprocessorExpression();
10242 void CodeCompletePreprocessorMacroArgument(Scope *S,
10243 IdentifierInfo *Macro,
10244 MacroInfo *MacroInfo,
10245 unsigned Argument);
10246 void CodeCompleteNaturalLanguage();
10247 void CodeCompleteAvailabilityPlatformName();
10248 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator,
10249 CodeCompletionTUInfo &CCTUInfo,
10250 SmallVectorImpl<CodeCompletionResult> &Results);
10251 //@}
10252
10253 //===--------------------------------------------------------------------===//
10254 // Extra semantic analysis beyond the C type system
10255
10256public:
10257 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL,
10258 unsigned ByteNo) const;
10259
10260private:
10261 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr,
10262 const ArraySubscriptExpr *ASE=nullptr,
10263 bool AllowOnePastEnd=true, bool IndexNegated=false);
10264 void CheckArrayAccess(const Expr *E);
10265 // Used to grab the relevant information from a FormatAttr and a
10266 // FunctionDeclaration.
10267 struct FormatStringInfo {
10268 unsigned FormatIdx;
10269 unsigned FirstDataArg;
10270 bool HasVAListArg;
10271 };
10272
10273 static bool getFormatStringInfo(const FormatAttr *Format, bool IsCXXMember,
10274 FormatStringInfo *FSI);
10275 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall,
10276 const FunctionProtoType *Proto);
10277 bool CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation loc,
10278 ArrayRef<const Expr *> Args);
10279 bool CheckPointerCall(NamedDecl *NDecl, CallExpr *TheCall,
10280 const FunctionProtoType *Proto);
10281 bool CheckOtherCall(CallExpr *TheCall, const FunctionProtoType *Proto);
10282 void CheckConstructorCall(FunctionDecl *FDecl,
10283 ArrayRef<const Expr *> Args,
10284 const FunctionProtoType *Proto,
10285 SourceLocation Loc);
10286
10287 void checkCall(NamedDecl *FDecl, const FunctionProtoType *Proto,
10288 const Expr *ThisArg, ArrayRef<const Expr *> Args,
10289 bool IsMemberFunction, SourceLocation Loc, SourceRange Range,
10290 VariadicCallType CallType);
10291
10292 bool CheckObjCString(Expr *Arg);
10293 ExprResult CheckOSLogFormatStringArg(Expr *Arg);
10294
10295 ExprResult CheckBuiltinFunctionCall(FunctionDecl *FDecl,
10296 unsigned BuiltinID, CallExpr *TheCall);
10297
10298 bool CheckARMBuiltinExclusiveCall(unsigned BuiltinID, CallExpr *TheCall,
10299 unsigned MaxWidth);
10300 bool CheckNeonBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall);
10301 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall);
10302
10303 bool CheckAArch64BuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall);
10304 bool CheckMipsBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall);
10305 bool CheckSystemZBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall);
10306 bool CheckX86BuiltinRoundingOrSAE(unsigned BuiltinID, CallExpr *TheCall);
10307 bool CheckX86BuiltinGatherScatterScale(unsigned BuiltinID, CallExpr *TheCall);
10308 bool CheckX86BuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall);
10309 bool CheckPPCBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall);
10310
10311 bool SemaBuiltinVAStart(unsigned BuiltinID, CallExpr *TheCall);
10312 bool SemaBuiltinVAStartARMMicrosoft(CallExpr *Call);
10313 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall);
10314 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs);
10315 bool SemaBuiltinVSX(CallExpr *TheCall);
10316 bool SemaBuiltinOSLogFormat(CallExpr *TheCall);
10317
10318public:
10319 // Used by C++ template instantiation.
10320 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall);
10321 ExprResult SemaConvertVectorExpr(Expr *E, TypeSourceInfo *TInfo,
10322 SourceLocation BuiltinLoc,
10323 SourceLocation RParenLoc);
10324
10325private:
10326 bool SemaBuiltinPrefetch(CallExpr *TheCall);
10327 bool SemaBuiltinAllocaWithAlign(CallExpr *TheCall);
10328 bool SemaBuiltinAssume(CallExpr *TheCall);
10329 bool SemaBuiltinAssumeAligned(CallExpr *TheCall);
10330 bool SemaBuiltinLongjmp(CallExpr *TheCall);
10331 bool SemaBuiltinSetjmp(CallExpr *TheCall);
10332 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult);
10333 ExprResult SemaBuiltinNontemporalOverloaded(ExprResult TheCallResult);
10334 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult,
10335 AtomicExpr::AtomicOp Op);
10336 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum,
10337 llvm::APSInt &Result);
10338 bool SemaBuiltinConstantArgRange(CallExpr *TheCall, int ArgNum,
10339 int Low, int High);
10340 bool SemaBuiltinConstantArgMultiple(CallExpr *TheCall, int ArgNum,
10341 unsigned Multiple);
10342 bool SemaBuiltinARMSpecialReg(unsigned BuiltinID, CallExpr *TheCall,
10343 int ArgNum, unsigned ExpectedFieldNum,
10344 bool AllowName);
10345public:
10346 enum FormatStringType {
10347 FST_Scanf,
10348 FST_Printf,
10349 FST_NSString,
10350 FST_Strftime,
10351 FST_Strfmon,
10352 FST_Kprintf,
10353 FST_FreeBSDKPrintf,
10354 FST_OSTrace,
10355 FST_OSLog,
10356 FST_Unknown
10357 };
10358 static FormatStringType GetFormatStringType(const FormatAttr *Format);
10359
10360 bool FormatStringHasSArg(const StringLiteral *FExpr);
10361
10362 static bool GetFormatNSStringIdx(const FormatAttr *Format, unsigned &Idx);
10363
10364private:
10365 bool CheckFormatArguments(const FormatAttr *Format,
10366 ArrayRef<const Expr *> Args,
10367 bool IsCXXMember,
10368 VariadicCallType CallType,
10369 SourceLocation Loc, SourceRange Range,
10370 llvm::SmallBitVector &CheckedVarArgs);
10371 bool CheckFormatArguments(ArrayRef<const Expr *> Args,
10372 bool HasVAListArg, unsigned format_idx,
10373 unsigned firstDataArg, FormatStringType Type,
10374 VariadicCallType CallType,
10375 SourceLocation Loc, SourceRange range,
10376 llvm::SmallBitVector &CheckedVarArgs);
10377
10378 void CheckAbsoluteValueFunction(const CallExpr *Call,
10379 const FunctionDecl *FDecl);
10380
10381 void CheckMaxUnsignedZero(const CallExpr *Call, const FunctionDecl *FDecl);
10382
10383 void CheckMemaccessArguments(const CallExpr *Call,
10384 unsigned BId,
10385 IdentifierInfo *FnName);
10386
10387 void CheckStrlcpycatArguments(const CallExpr *Call,
10388 IdentifierInfo *FnName);
10389
10390 void CheckStrncatArguments(const CallExpr *Call,
10391 IdentifierInfo *FnName);
10392
10393 void CheckReturnValExpr(Expr *RetValExp, QualType lhsType,
10394 SourceLocation ReturnLoc,
10395 bool isObjCMethod = false,
10396 const AttrVec *Attrs = nullptr,
10397 const FunctionDecl *FD = nullptr);
10398
10399 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS);
10400 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation());
10401 void CheckBoolLikeConversion(Expr *E, SourceLocation CC);
10402 void CheckForIntOverflow(Expr *E);
10403 void CheckUnsequencedOperations(Expr *E);
10404
10405 /// \brief Perform semantic checks on a completed expression. This will either
10406 /// be a full-expression or a default argument expression.
10407 void CheckCompletedExpr(Expr *E, SourceLocation CheckLoc = SourceLocation(),
10408 bool IsConstexpr = false);
10409
10410 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field,
10411 Expr *Init);
10412
10413 /// Check if there is a field shadowing.
10414 void CheckShadowInheritedFields(const SourceLocation &Loc,
10415 DeclarationName FieldName,
10416 const CXXRecordDecl *RD);
10417
10418 /// \brief Check if the given expression contains 'break' or 'continue'
10419 /// statement that produces control flow different from GCC.
10420 void CheckBreakContinueBinding(Expr *E);
10421
10422 /// \brief Check whether receiver is mutable ObjC container which
10423 /// attempts to add itself into the container
10424 void CheckObjCCircularContainer(ObjCMessageExpr *Message);
10425
10426 void AnalyzeDeleteExprMismatch(const CXXDeleteExpr *DE);
10427 void AnalyzeDeleteExprMismatch(FieldDecl *Field, SourceLocation DeleteLoc,
10428 bool DeleteWasArrayForm);
10429public:
10430 /// \brief Register a magic integral constant to be used as a type tag.
10431 void RegisterTypeTagForDatatype(const IdentifierInfo *ArgumentKind,
10432 uint64_t MagicValue, QualType Type,
10433 bool LayoutCompatible, bool MustBeNull);
10434
10435 struct TypeTagData {
10436 TypeTagData() {}
10437
10438 TypeTagData(QualType Type, bool LayoutCompatible, bool MustBeNull) :
10439 Type(Type), LayoutCompatible(LayoutCompatible),
10440 MustBeNull(MustBeNull)
10441 {}
10442
10443 QualType Type;
10444
10445 /// If true, \c Type should be compared with other expression's types for
10446 /// layout-compatibility.
10447 unsigned LayoutCompatible : 1;
10448 unsigned MustBeNull : 1;
10449 };
10450
10451 /// A pair of ArgumentKind identifier and magic value. This uniquely
10452 /// identifies the magic value.
10453 typedef std::pair<const IdentifierInfo *, uint64_t> TypeTagMagicValue;
10454
10455private:
10456 /// \brief A map from magic value to type information.
10457 std::unique_ptr<llvm::DenseMap<TypeTagMagicValue, TypeTagData>>
10458 TypeTagForDatatypeMagicValues;
10459
10460 /// \brief Peform checks on a call of a function with argument_with_type_tag
10461 /// or pointer_with_type_tag attributes.
10462 void CheckArgumentWithTypeTag(const ArgumentWithTypeTagAttr *Attr,
10463 const ArrayRef<const Expr *> ExprArgs,
10464 SourceLocation CallSiteLoc);
10465
10466 /// \brief Check if we are taking the address of a packed field
10467 /// as this may be a problem if the pointer value is dereferenced.
10468 void CheckAddressOfPackedMember(Expr *rhs);
10469
10470 /// \brief The parser's current scope.
10471 ///
10472 /// The parser maintains this state here.
10473 Scope *CurScope;
10474
10475 mutable IdentifierInfo *Ident_super;
10476 mutable IdentifierInfo *Ident___float128;
10477
10478 /// Nullability type specifiers.
10479 IdentifierInfo *Ident__Nonnull = nullptr;
10480 IdentifierInfo *Ident__Nullable = nullptr;
10481 IdentifierInfo *Ident__Null_unspecified = nullptr;
10482
10483 IdentifierInfo *Ident_NSError = nullptr;
10484
10485 /// \brief The handler for the FileChanged preprocessor events.
10486 ///
10487 /// Used for diagnostics that implement custom semantic analysis for #include
10488 /// directives, like -Wpragma-pack.
10489 sema::SemaPPCallbacks *SemaPPCallbackHandler;
10490
10491protected:
10492 friend class Parser;
10493 friend class InitializationSequence;
10494 friend class ASTReader;
10495 friend class ASTDeclReader;
10496 friend class ASTWriter;
10497
10498public:
10499 /// Retrieve the keyword associated
10500 IdentifierInfo *getNullabilityKeyword(NullabilityKind nullability);
10501
10502 /// The struct behind the CFErrorRef pointer.
10503 RecordDecl *CFError = nullptr;
10504
10505 /// Retrieve the identifier "NSError".
10506 IdentifierInfo *getNSErrorIdent();
10507
10508 /// \brief Retrieve the parser's current scope.
10509 ///
10510 /// This routine must only be used when it is certain that semantic analysis
10511 /// and the parser are in precisely the same context, which is not the case
10512 /// when, e.g., we are performing any kind of template instantiation.
10513 /// Therefore, the only safe places to use this scope are in the parser
10514 /// itself and in routines directly invoked from the parser and *never* from
10515 /// template substitution or instantiation.
10516 Scope *getCurScope() const { return CurScope; }
10517
10518 void incrementMSManglingNumber() const {
10519 return CurScope->incrementMSManglingNumber();
10520 }
10521
10522 IdentifierInfo *getSuperIdentifier() const;
10523 IdentifierInfo *getFloat128Identifier() const;
10524
10525 Decl *getObjCDeclContext() const;
10526
10527 DeclContext *getCurLexicalContext() const {
10528 return OriginalLexicalContext ? OriginalLexicalContext : CurContext;
10529 }
10530
10531 const DeclContext *getCurObjCLexicalContext() const {
10532 const DeclContext *DC = getCurLexicalContext();
10533 // A category implicitly has the attribute of the interface.
10534 if (const ObjCCategoryDecl *CatD = dyn_cast<ObjCCategoryDecl>(DC))
10535 DC = CatD->getClassInterface();
10536 return DC;
10537 }
10538
10539 /// \brief To be used for checking whether the arguments being passed to
10540 /// function exceeds the number of parameters expected for it.
10541 static bool TooManyArguments(size_t NumParams, size_t NumArgs,
10542 bool PartialOverloading = false) {
10543 // We check whether we're just after a comma in code-completion.
10544 if (NumArgs > 0 && PartialOverloading)
10545 return NumArgs + 1 > NumParams; // If so, we view as an extra argument.
10546 return NumArgs > NumParams;
10547 }
10548
10549 // Emitting members of dllexported classes is delayed until the class
10550 // (including field initializers) is fully parsed.
10551 SmallVector<CXXRecordDecl*, 4> DelayedDllExportClasses;
10552
10553private:
10554 class SavePendingParsedClassStateRAII {
10555 public:
10556 SavePendingParsedClassStateRAII(Sema &S) : S(S) { swapSavedState(); }
10557
10558 ~SavePendingParsedClassStateRAII() {
10559 assert(S.DelayedExceptionSpecChecks.empty() &&(static_cast <bool> (S.DelayedExceptionSpecChecks.empty
() && "there shouldn't be any pending delayed exception spec checks"
) ? void (0) : __assert_fail ("S.DelayedExceptionSpecChecks.empty() && \"there shouldn't be any pending delayed exception spec checks\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 10560, __extension__ __PRETTY_FUNCTION__))
10560 "there shouldn't be any pending delayed exception spec checks")(static_cast <bool> (S.DelayedExceptionSpecChecks.empty
() && "there shouldn't be any pending delayed exception spec checks"
) ? void (0) : __assert_fail ("S.DelayedExceptionSpecChecks.empty() && \"there shouldn't be any pending delayed exception spec checks\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 10560, __extension__ __PRETTY_FUNCTION__));
10561 assert(S.DelayedDefaultedMemberExceptionSpecs.empty() &&(static_cast <bool> (S.DelayedDefaultedMemberExceptionSpecs
.empty() && "there shouldn't be any pending delayed defaulted member "
"exception specs") ? void (0) : __assert_fail ("S.DelayedDefaultedMemberExceptionSpecs.empty() && \"there shouldn't be any pending delayed defaulted member \" \"exception specs\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 10563, __extension__ __PRETTY_FUNCTION__))
10562 "there shouldn't be any pending delayed defaulted member "(static_cast <bool> (S.DelayedDefaultedMemberExceptionSpecs
.empty() && "there shouldn't be any pending delayed defaulted member "
"exception specs") ? void (0) : __assert_fail ("S.DelayedDefaultedMemberExceptionSpecs.empty() && \"there shouldn't be any pending delayed defaulted member \" \"exception specs\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 10563, __extension__ __PRETTY_FUNCTION__))
10563 "exception specs")(static_cast <bool> (S.DelayedDefaultedMemberExceptionSpecs
.empty() && "there shouldn't be any pending delayed defaulted member "
"exception specs") ? void (0) : __assert_fail ("S.DelayedDefaultedMemberExceptionSpecs.empty() && \"there shouldn't be any pending delayed defaulted member \" \"exception specs\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 10563, __extension__ __PRETTY_FUNCTION__));
10564 assert(S.DelayedDllExportClasses.empty() &&(static_cast <bool> (S.DelayedDllExportClasses.empty() &&
"there shouldn't be any pending delayed DLL export classes")
? void (0) : __assert_fail ("S.DelayedDllExportClasses.empty() && \"there shouldn't be any pending delayed DLL export classes\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 10565, __extension__ __PRETTY_FUNCTION__))
10565 "there shouldn't be any pending delayed DLL export classes")(static_cast <bool> (S.DelayedDllExportClasses.empty() &&
"there shouldn't be any pending delayed DLL export classes")
? void (0) : __assert_fail ("S.DelayedDllExportClasses.empty() && \"there shouldn't be any pending delayed DLL export classes\""
, "/build/llvm-toolchain-snapshot-6.0~svn319413/tools/clang/include/clang/Sema/Sema.h"
, 10565, __extension__ __PRETTY_FUNCTION__));
10566 swapSavedState();
10567 }
10568
10569 private:
10570 Sema &S;
10571 decltype(DelayedExceptionSpecChecks) SavedExceptionSpecChecks;
10572 decltype(DelayedDefaultedMemberExceptionSpecs)
10573 SavedDefaultedMemberExceptionSpecs;
10574 decltype(DelayedDllExportClasses) SavedDllExportClasses;
10575
10576 void swapSavedState() {
10577 SavedExceptionSpecChecks.swap(S.DelayedExceptionSpecChecks);
10578 SavedDefaultedMemberExceptionSpecs.swap(
10579 S.DelayedDefaultedMemberExceptionSpecs);
10580 SavedDllExportClasses.swap(S.DelayedDllExportClasses);
10581 }
10582 };
10583
10584 /// \brief Helper class that collects misaligned member designations and
10585 /// their location info for delayed diagnostics.
10586 struct MisalignedMember {
10587 Expr *E;
10588 RecordDecl *RD;
10589 ValueDecl *MD;
10590 CharUnits Alignment;
10591
10592 MisalignedMember() : E(), RD(), MD(), Alignment() {}
10593 MisalignedMember(Expr *E, RecordDecl *RD, ValueDecl *MD,
10594 CharUnits Alignment)
10595 : E(E), RD(RD), MD(MD), Alignment(Alignment) {}
10596 explicit MisalignedMember(Expr *E)
10597 : MisalignedMember(E, nullptr, nullptr, CharUnits()) {}
10598
10599 bool operator==(const MisalignedMember &m) { return this->E == m.E; }
10600 };
10601 /// \brief Small set of gathered accesses to potentially misaligned members
10602 /// due to the packed attribute.
10603 SmallVector<MisalignedMember, 4> MisalignedMembers;
10604
10605 /// \brief Adds an expression to the set of gathered misaligned members.
10606 void AddPotentialMisalignedMembers(Expr *E, RecordDecl *RD, ValueDecl *MD,
10607 CharUnits Alignment);
10608
10609public:
10610 /// \brief Diagnoses the current set of gathered accesses. This typically
10611 /// happens at full expression level. The set is cleared after emitting the
10612 /// diagnostics.
10613 void DiagnoseMisalignedMembers();
10614
10615 /// \brief This function checks if the expression is in the sef of potentially
10616 /// misaligned members and it is converted to some pointer type T with lower
10617 /// or equal alignment requirements. If so it removes it. This is used when
10618 /// we do not want to diagnose such misaligned access (e.g. in conversions to
10619 /// void*).
10620 void DiscardMisalignedMemberAddress(const Type *T, Expr *E);
10621
10622 /// \brief This function calls Action when it determines that E designates a
10623 /// misaligned member due to the packed attribute. This is used to emit
10624 /// local diagnostics like in reference binding.
10625 void RefersToMemberWithReducedAlignment(
10626 Expr *E,
10627 llvm::function_ref<void(Expr *, RecordDecl *, FieldDecl *, CharUnits)>
10628 Action);
10629};
10630
10631/// \brief RAII object that enters a new expression evaluation context.
10632class EnterExpressionEvaluationContext {
10633 Sema &Actions;
10634 bool Entered = true;
10635
10636public:
10637
10638 EnterExpressionEvaluationContext(Sema &Actions,
10639 Sema::ExpressionEvaluationContext NewContext,
10640 Decl *LambdaContextDecl = nullptr,
10641 bool IsDecltype = false,
10642 bool ShouldEnter = true)
10643 : Actions(Actions), Entered(ShouldEnter) {
10644 if (Entered)
10645 Actions.PushExpressionEvaluationContext(NewContext, LambdaContextDecl,
10646 IsDecltype);
10647 }
10648 EnterExpressionEvaluationContext(Sema &Actions,
10649 Sema::ExpressionEvaluationContext NewContext,
10650 Sema::ReuseLambdaContextDecl_t,
10651 bool IsDecltype = false)
10652 : Actions(Actions) {
10653 Actions.PushExpressionEvaluationContext(NewContext,
10654 Sema::ReuseLambdaContextDecl,
10655 IsDecltype);
10656 }
10657
10658 enum InitListTag { InitList };
10659 EnterExpressionEvaluationContext(Sema &Actions, InitListTag,
10660 bool ShouldEnter = true)
10661 : Actions(Actions), Entered(false) {
10662 // In C++11 onwards, narrowing checks are performed on the contents of
10663 // braced-init-lists, even when they occur within unevaluated operands.
10664 // Therefore we still need to instantiate constexpr functions used in such
10665 // a context.
10666 if (ShouldEnter && Actions.isUnevaluatedContext() &&
10667 Actions.getLangOpts().CPlusPlus11) {
10668 Actions.PushExpressionEvaluationContext(
10669 Sema::ExpressionEvaluationContext::UnevaluatedList, nullptr, false);
10670 Entered = true;
10671 }
10672 }
10673
10674 ~EnterExpressionEvaluationContext() {
10675 if (Entered)
10676 Actions.PopExpressionEvaluationContext();
10677 }
10678};
10679
10680DeductionFailureInfo
10681MakeDeductionFailureInfo(ASTContext &Context, Sema::TemplateDeductionResult TDK,
10682 sema::TemplateDeductionInfo &Info);
10683
10684/// \brief Contains a late templated function.
10685/// Will be parsed at the end of the translation unit, used by Sema & Parser.
10686struct LateParsedTemplate {
10687 CachedTokens Toks;
10688 /// \brief The template function declaration to be late parsed.
10689 Decl *D;
10690};
10691
10692} // end namespace clang
10693
10694namespace llvm {
10695// Hash a FunctionDeclAndLoc by looking at both its FunctionDecl and its
10696// SourceLocation.
10697template <> struct DenseMapInfo<clang::Sema::FunctionDeclAndLoc> {
10698 using FunctionDeclAndLoc = clang::Sema::FunctionDeclAndLoc;
10699 using FDBaseInfo = DenseMapInfo<clang::CanonicalDeclPtr<clang::FunctionDecl>>;
10700
10701 static FunctionDeclAndLoc getEmptyKey() {
10702 return {FDBaseInfo::getEmptyKey(), clang::SourceLocation()};
10703 }
10704
10705 static FunctionDeclAndLoc getTombstoneKey() {
10706 return {FDBaseInfo::getTombstoneKey(), clang::SourceLocation()};
10707 }
10708
10709 static unsigned getHashValue(const FunctionDeclAndLoc &FDL) {
10710 return hash_combine(FDBaseInfo::getHashValue(FDL.FD),
10711 FDL.Loc.getRawEncoding());
10712 }
10713
10714 static bool isEqual(const FunctionDeclAndLoc &LHS,
10715 const FunctionDeclAndLoc &RHS) {
10716 return LHS.FD == RHS.FD && LHS.Loc == RHS.Loc;
10717 }
10718};
10719} // namespace llvm
10720
10721#endif