ExprCXX.cpp revision 9fcce65e7e1307b5b8da9be13e4092d6bb94dc1d
1//===--- ExprCXX.cpp - (C++) Expression AST Node Implementation -----------===// 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 implements the subclesses of Expr class declared in ExprCXX.h 11// 12//===----------------------------------------------------------------------===// 13 14#include "clang/Basic/IdentifierTable.h" 15#include "clang/AST/DeclCXX.h" 16#include "clang/AST/DeclTemplate.h" 17#include "clang/AST/ExprCXX.h" 18#include "clang/AST/TypeLoc.h" 19using namespace clang; 20 21 22//===----------------------------------------------------------------------===// 23// Child Iterators for iterating over subexpressions/substatements 24//===----------------------------------------------------------------------===// 25 26QualType CXXTypeidExpr::getTypeOperand() const { 27 assert(isTypeOperand() && "Cannot call getTypeOperand for typeid(expr)"); 28 return Operand.get<TypeSourceInfo *>()->getType().getNonReferenceType() 29 .getUnqualifiedType(); 30} 31 32QualType CXXUuidofExpr::getTypeOperand() const { 33 assert(isTypeOperand() && "Cannot call getTypeOperand for __uuidof(expr)"); 34 return Operand.get<TypeSourceInfo *>()->getType().getNonReferenceType() 35 .getUnqualifiedType(); 36} 37 38// CXXScalarValueInitExpr 39SourceRange CXXScalarValueInitExpr::getSourceRange() const { 40 SourceLocation Start = RParenLoc; 41 if (TypeInfo) 42 Start = TypeInfo->getTypeLoc().getBeginLoc(); 43 return SourceRange(Start, RParenLoc); 44} 45 46// CXXNewExpr 47CXXNewExpr::CXXNewExpr(ASTContext &C, bool globalNew, FunctionDecl *operatorNew, 48 FunctionDecl *operatorDelete, 49 bool usualArrayDeleteWantsSize, 50 Expr **placementArgs, unsigned numPlaceArgs, 51 SourceRange typeIdParens, Expr *arraySize, 52 InitializationStyle initializationStyle, 53 Expr *initializer, QualType ty, 54 TypeSourceInfo *allocatedTypeInfo, 55 SourceLocation startLoc, SourceRange directInitRange) 56 : Expr(CXXNewExprClass, ty, VK_RValue, OK_Ordinary, 57 ty->isDependentType(), ty->isDependentType(), 58 ty->isInstantiationDependentType(), 59 ty->containsUnexpandedParameterPack()), 60 SubExprs(0), OperatorNew(operatorNew), OperatorDelete(operatorDelete), 61 AllocatedTypeInfo(allocatedTypeInfo), TypeIdParens(typeIdParens), 62 StartLoc(startLoc), DirectInitRange(directInitRange), 63 GlobalNew(globalNew), UsualArrayDeleteWantsSize(usualArrayDeleteWantsSize) { 64 assert((initializer != 0 || initializationStyle == NoInit) && 65 "Only NoInit can have no initializer."); 66 StoredInitializationStyle = initializer ? initializationStyle + 1 : 0; 67 AllocateArgsArray(C, arraySize != 0, numPlaceArgs, initializer != 0); 68 unsigned i = 0; 69 if (Array) { 70 if (arraySize->isInstantiationDependent()) 71 ExprBits.InstantiationDependent = true; 72 73 if (arraySize->containsUnexpandedParameterPack()) 74 ExprBits.ContainsUnexpandedParameterPack = true; 75 76 SubExprs[i++] = arraySize; 77 } 78 79 if (initializer) { 80 if (initializer->isInstantiationDependent()) 81 ExprBits.InstantiationDependent = true; 82 83 if (initializer->containsUnexpandedParameterPack()) 84 ExprBits.ContainsUnexpandedParameterPack = true; 85 86 SubExprs[i++] = initializer; 87 } 88 89 for (unsigned j = 0; j < NumPlacementArgs; ++j) { 90 if (placementArgs[j]->isInstantiationDependent()) 91 ExprBits.InstantiationDependent = true; 92 if (placementArgs[j]->containsUnexpandedParameterPack()) 93 ExprBits.ContainsUnexpandedParameterPack = true; 94 95 SubExprs[i++] = placementArgs[j]; 96 } 97} 98 99void CXXNewExpr::AllocateArgsArray(ASTContext &C, bool isArray, 100 unsigned numPlaceArgs, bool hasInitializer){ 101 assert(SubExprs == 0 && "SubExprs already allocated"); 102 Array = isArray; 103 NumPlacementArgs = numPlaceArgs; 104 105 unsigned TotalSize = Array + hasInitializer + NumPlacementArgs; 106 SubExprs = new (C) Stmt*[TotalSize]; 107} 108 109bool CXXNewExpr::shouldNullCheckAllocation(ASTContext &Ctx) const { 110 return getOperatorNew()->getType()-> 111 castAs<FunctionProtoType>()->isNothrow(Ctx); 112} 113 114SourceLocation CXXNewExpr::getEndLoc() const { 115 switch (getInitializationStyle()) { 116 case NoInit: 117 return AllocatedTypeInfo->getTypeLoc().getEndLoc(); 118 case CallInit: 119 return DirectInitRange.getEnd(); 120 case ListInit: 121 return getInitializer()->getSourceRange().getEnd(); 122 } 123 llvm_unreachable("bogus initialization style"); 124} 125 126// CXXDeleteExpr 127QualType CXXDeleteExpr::getDestroyedType() const { 128 const Expr *Arg = getArgument(); 129 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(Arg)) { 130 if (ICE->getCastKind() != CK_UserDefinedConversion && 131 ICE->getType()->isVoidPointerType()) 132 Arg = ICE->getSubExpr(); 133 else 134 break; 135 } 136 // The type-to-delete may not be a pointer if it's a dependent type. 137 const QualType ArgType = Arg->getType(); 138 139 if (ArgType->isDependentType() && !ArgType->isPointerType()) 140 return QualType(); 141 142 return ArgType->getAs<PointerType>()->getPointeeType(); 143} 144 145// CXXPseudoDestructorExpr 146PseudoDestructorTypeStorage::PseudoDestructorTypeStorage(TypeSourceInfo *Info) 147 : Type(Info) 148{ 149 Location = Info->getTypeLoc().getLocalSourceRange().getBegin(); 150} 151 152CXXPseudoDestructorExpr::CXXPseudoDestructorExpr(ASTContext &Context, 153 Expr *Base, bool isArrow, SourceLocation OperatorLoc, 154 NestedNameSpecifierLoc QualifierLoc, TypeSourceInfo *ScopeType, 155 SourceLocation ColonColonLoc, SourceLocation TildeLoc, 156 PseudoDestructorTypeStorage DestroyedType) 157 : Expr(CXXPseudoDestructorExprClass, 158 Context.getPointerType(Context.getFunctionType(Context.VoidTy, 0, 0, 159 FunctionProtoType::ExtProtoInfo())), 160 VK_RValue, OK_Ordinary, 161 /*isTypeDependent=*/(Base->isTypeDependent() || 162 (DestroyedType.getTypeSourceInfo() && 163 DestroyedType.getTypeSourceInfo()->getType()->isDependentType())), 164 /*isValueDependent=*/Base->isValueDependent(), 165 (Base->isInstantiationDependent() || 166 (QualifierLoc && 167 QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent()) || 168 (ScopeType && 169 ScopeType->getType()->isInstantiationDependentType()) || 170 (DestroyedType.getTypeSourceInfo() && 171 DestroyedType.getTypeSourceInfo()->getType() 172 ->isInstantiationDependentType())), 173 // ContainsUnexpandedParameterPack 174 (Base->containsUnexpandedParameterPack() || 175 (QualifierLoc && 176 QualifierLoc.getNestedNameSpecifier() 177 ->containsUnexpandedParameterPack()) || 178 (ScopeType && 179 ScopeType->getType()->containsUnexpandedParameterPack()) || 180 (DestroyedType.getTypeSourceInfo() && 181 DestroyedType.getTypeSourceInfo()->getType() 182 ->containsUnexpandedParameterPack()))), 183 Base(static_cast<Stmt *>(Base)), IsArrow(isArrow), 184 OperatorLoc(OperatorLoc), QualifierLoc(QualifierLoc), 185 ScopeType(ScopeType), ColonColonLoc(ColonColonLoc), TildeLoc(TildeLoc), 186 DestroyedType(DestroyedType) { } 187 188QualType CXXPseudoDestructorExpr::getDestroyedType() const { 189 if (TypeSourceInfo *TInfo = DestroyedType.getTypeSourceInfo()) 190 return TInfo->getType(); 191 192 return QualType(); 193} 194 195SourceRange CXXPseudoDestructorExpr::getSourceRange() const { 196 SourceLocation End = DestroyedType.getLocation(); 197 if (TypeSourceInfo *TInfo = DestroyedType.getTypeSourceInfo()) 198 End = TInfo->getTypeLoc().getLocalSourceRange().getEnd(); 199 return SourceRange(Base->getLocStart(), End); 200} 201 202// UnresolvedLookupExpr 203UnresolvedLookupExpr * 204UnresolvedLookupExpr::Create(ASTContext &C, 205 CXXRecordDecl *NamingClass, 206 NestedNameSpecifierLoc QualifierLoc, 207 SourceLocation TemplateKWLoc, 208 const DeclarationNameInfo &NameInfo, 209 bool ADL, 210 const TemplateArgumentListInfo *Args, 211 UnresolvedSetIterator Begin, 212 UnresolvedSetIterator End) 213{ 214 assert(Args || TemplateKWLoc.isValid()); 215 unsigned num_args = Args ? Args->size() : 0; 216 void *Mem = C.Allocate(sizeof(UnresolvedLookupExpr) + 217 ASTTemplateKWAndArgsInfo::sizeFor(num_args)); 218 return new (Mem) UnresolvedLookupExpr(C, NamingClass, QualifierLoc, 219 TemplateKWLoc, NameInfo, 220 ADL, /*Overload*/ true, Args, 221 Begin, End, /*StdIsAssociated=*/false); 222} 223 224UnresolvedLookupExpr * 225UnresolvedLookupExpr::CreateEmpty(ASTContext &C, 226 bool HasTemplateKWAndArgsInfo, 227 unsigned NumTemplateArgs) { 228 std::size_t size = sizeof(UnresolvedLookupExpr); 229 if (HasTemplateKWAndArgsInfo) 230 size += ASTTemplateKWAndArgsInfo::sizeFor(NumTemplateArgs); 231 232 void *Mem = C.Allocate(size, llvm::alignOf<UnresolvedLookupExpr>()); 233 UnresolvedLookupExpr *E = new (Mem) UnresolvedLookupExpr(EmptyShell()); 234 E->HasTemplateKWAndArgsInfo = HasTemplateKWAndArgsInfo; 235 return E; 236} 237 238OverloadExpr::OverloadExpr(StmtClass K, ASTContext &C, 239 NestedNameSpecifierLoc QualifierLoc, 240 SourceLocation TemplateKWLoc, 241 const DeclarationNameInfo &NameInfo, 242 const TemplateArgumentListInfo *TemplateArgs, 243 UnresolvedSetIterator Begin, 244 UnresolvedSetIterator End, 245 bool KnownDependent, 246 bool KnownInstantiationDependent, 247 bool KnownContainsUnexpandedParameterPack) 248 : Expr(K, C.OverloadTy, VK_LValue, OK_Ordinary, KnownDependent, 249 KnownDependent, 250 (KnownInstantiationDependent || 251 NameInfo.isInstantiationDependent() || 252 (QualifierLoc && 253 QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent())), 254 (KnownContainsUnexpandedParameterPack || 255 NameInfo.containsUnexpandedParameterPack() || 256 (QualifierLoc && 257 QualifierLoc.getNestedNameSpecifier() 258 ->containsUnexpandedParameterPack()))), 259 NameInfo(NameInfo), QualifierLoc(QualifierLoc), 260 Results(0), NumResults(End - Begin), 261 HasTemplateKWAndArgsInfo(TemplateArgs != 0 || TemplateKWLoc.isValid()) 262{ 263 NumResults = End - Begin; 264 if (NumResults) { 265 // Determine whether this expression is type-dependent. 266 for (UnresolvedSetImpl::const_iterator I = Begin; I != End; ++I) { 267 if ((*I)->getDeclContext()->isDependentContext() || 268 isa<UnresolvedUsingValueDecl>(*I)) { 269 ExprBits.TypeDependent = true; 270 ExprBits.ValueDependent = true; 271 } 272 } 273 274 Results = static_cast<DeclAccessPair *>( 275 C.Allocate(sizeof(DeclAccessPair) * NumResults, 276 llvm::alignOf<DeclAccessPair>())); 277 memcpy(Results, &*Begin.getIterator(), 278 NumResults * sizeof(DeclAccessPair)); 279 } 280 281 // If we have explicit template arguments, check for dependent 282 // template arguments and whether they contain any unexpanded pack 283 // expansions. 284 if (TemplateArgs) { 285 bool Dependent = false; 286 bool InstantiationDependent = false; 287 bool ContainsUnexpandedParameterPack = false; 288 getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc, *TemplateArgs, 289 Dependent, 290 InstantiationDependent, 291 ContainsUnexpandedParameterPack); 292 293 if (Dependent) { 294 ExprBits.TypeDependent = true; 295 ExprBits.ValueDependent = true; 296 } 297 if (InstantiationDependent) 298 ExprBits.InstantiationDependent = true; 299 if (ContainsUnexpandedParameterPack) 300 ExprBits.ContainsUnexpandedParameterPack = true; 301 } else if (TemplateKWLoc.isValid()) { 302 getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc); 303 } 304 305 if (isTypeDependent()) 306 setType(C.DependentTy); 307} 308 309void OverloadExpr::initializeResults(ASTContext &C, 310 UnresolvedSetIterator Begin, 311 UnresolvedSetIterator End) { 312 assert(Results == 0 && "Results already initialized!"); 313 NumResults = End - Begin; 314 if (NumResults) { 315 Results = static_cast<DeclAccessPair *>( 316 C.Allocate(sizeof(DeclAccessPair) * NumResults, 317 318 llvm::alignOf<DeclAccessPair>())); 319 memcpy(Results, &*Begin.getIterator(), 320 NumResults * sizeof(DeclAccessPair)); 321 } 322} 323 324CXXRecordDecl *OverloadExpr::getNamingClass() const { 325 if (isa<UnresolvedLookupExpr>(this)) 326 return cast<UnresolvedLookupExpr>(this)->getNamingClass(); 327 else 328 return cast<UnresolvedMemberExpr>(this)->getNamingClass(); 329} 330 331// DependentScopeDeclRefExpr 332DependentScopeDeclRefExpr::DependentScopeDeclRefExpr(QualType T, 333 NestedNameSpecifierLoc QualifierLoc, 334 SourceLocation TemplateKWLoc, 335 const DeclarationNameInfo &NameInfo, 336 const TemplateArgumentListInfo *Args) 337 : Expr(DependentScopeDeclRefExprClass, T, VK_LValue, OK_Ordinary, 338 true, true, 339 (NameInfo.isInstantiationDependent() || 340 (QualifierLoc && 341 QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent())), 342 (NameInfo.containsUnexpandedParameterPack() || 343 (QualifierLoc && 344 QualifierLoc.getNestedNameSpecifier() 345 ->containsUnexpandedParameterPack()))), 346 QualifierLoc(QualifierLoc), NameInfo(NameInfo), 347 HasTemplateKWAndArgsInfo(Args != 0 || TemplateKWLoc.isValid()) 348{ 349 if (Args) { 350 bool Dependent = true; 351 bool InstantiationDependent = true; 352 bool ContainsUnexpandedParameterPack 353 = ExprBits.ContainsUnexpandedParameterPack; 354 getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc, *Args, 355 Dependent, 356 InstantiationDependent, 357 ContainsUnexpandedParameterPack); 358 ExprBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; 359 } else if (TemplateKWLoc.isValid()) { 360 getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc); 361 } 362} 363 364DependentScopeDeclRefExpr * 365DependentScopeDeclRefExpr::Create(ASTContext &C, 366 NestedNameSpecifierLoc QualifierLoc, 367 SourceLocation TemplateKWLoc, 368 const DeclarationNameInfo &NameInfo, 369 const TemplateArgumentListInfo *Args) { 370 std::size_t size = sizeof(DependentScopeDeclRefExpr); 371 if (Args) 372 size += ASTTemplateKWAndArgsInfo::sizeFor(Args->size()); 373 else if (TemplateKWLoc.isValid()) 374 size += ASTTemplateKWAndArgsInfo::sizeFor(0); 375 void *Mem = C.Allocate(size); 376 return new (Mem) DependentScopeDeclRefExpr(C.DependentTy, QualifierLoc, 377 TemplateKWLoc, NameInfo, Args); 378} 379 380DependentScopeDeclRefExpr * 381DependentScopeDeclRefExpr::CreateEmpty(ASTContext &C, 382 bool HasTemplateKWAndArgsInfo, 383 unsigned NumTemplateArgs) { 384 std::size_t size = sizeof(DependentScopeDeclRefExpr); 385 if (HasTemplateKWAndArgsInfo) 386 size += ASTTemplateKWAndArgsInfo::sizeFor(NumTemplateArgs); 387 void *Mem = C.Allocate(size); 388 DependentScopeDeclRefExpr *E 389 = new (Mem) DependentScopeDeclRefExpr(QualType(), NestedNameSpecifierLoc(), 390 SourceLocation(), 391 DeclarationNameInfo(), 0); 392 E->HasTemplateKWAndArgsInfo = HasTemplateKWAndArgsInfo; 393 return E; 394} 395 396SourceRange CXXConstructExpr::getSourceRange() const { 397 if (isa<CXXTemporaryObjectExpr>(this)) 398 return cast<CXXTemporaryObjectExpr>(this)->getSourceRange(); 399 400 if (ParenRange.isValid()) 401 return SourceRange(Loc, ParenRange.getEnd()); 402 403 SourceLocation End = Loc; 404 for (unsigned I = getNumArgs(); I > 0; --I) { 405 const Expr *Arg = getArg(I-1); 406 if (!Arg->isDefaultArgument()) { 407 SourceLocation NewEnd = Arg->getLocEnd(); 408 if (NewEnd.isValid()) { 409 End = NewEnd; 410 break; 411 } 412 } 413 } 414 415 return SourceRange(Loc, End); 416} 417 418SourceRange CXXOperatorCallExpr::getSourceRange() const { 419 OverloadedOperatorKind Kind = getOperator(); 420 if (Kind == OO_PlusPlus || Kind == OO_MinusMinus) { 421 if (getNumArgs() == 1) 422 // Prefix operator 423 return SourceRange(getOperatorLoc(), 424 getArg(0)->getSourceRange().getEnd()); 425 else 426 // Postfix operator 427 return SourceRange(getArg(0)->getSourceRange().getBegin(), 428 getOperatorLoc()); 429 } else if (Kind == OO_Arrow) { 430 return getArg(0)->getSourceRange(); 431 } else if (Kind == OO_Call) { 432 return SourceRange(getArg(0)->getSourceRange().getBegin(), getRParenLoc()); 433 } else if (Kind == OO_Subscript) { 434 return SourceRange(getArg(0)->getSourceRange().getBegin(), getRParenLoc()); 435 } else if (getNumArgs() == 1) { 436 return SourceRange(getOperatorLoc(), getArg(0)->getSourceRange().getEnd()); 437 } else if (getNumArgs() == 2) { 438 return SourceRange(getArg(0)->getSourceRange().getBegin(), 439 getArg(1)->getSourceRange().getEnd()); 440 } else { 441 return SourceRange(); 442 } 443} 444 445Expr *CXXMemberCallExpr::getImplicitObjectArgument() const { 446 if (const MemberExpr *MemExpr = 447 dyn_cast<MemberExpr>(getCallee()->IgnoreParens())) 448 return MemExpr->getBase(); 449 450 // FIXME: Will eventually need to cope with member pointers. 451 return 0; 452} 453 454CXXMethodDecl *CXXMemberCallExpr::getMethodDecl() const { 455 if (const MemberExpr *MemExpr = 456 dyn_cast<MemberExpr>(getCallee()->IgnoreParens())) 457 return cast<CXXMethodDecl>(MemExpr->getMemberDecl()); 458 459 // FIXME: Will eventually need to cope with member pointers. 460 return 0; 461} 462 463 464CXXRecordDecl *CXXMemberCallExpr::getRecordDecl() { 465 Expr* ThisArg = getImplicitObjectArgument(); 466 if (!ThisArg) 467 return 0; 468 469 if (ThisArg->getType()->isAnyPointerType()) 470 return ThisArg->getType()->getPointeeType()->getAsCXXRecordDecl(); 471 472 return ThisArg->getType()->getAsCXXRecordDecl(); 473} 474 475 476//===----------------------------------------------------------------------===// 477// Named casts 478//===----------------------------------------------------------------------===// 479 480/// getCastName - Get the name of the C++ cast being used, e.g., 481/// "static_cast", "dynamic_cast", "reinterpret_cast", or 482/// "const_cast". The returned pointer must not be freed. 483const char *CXXNamedCastExpr::getCastName() const { 484 switch (getStmtClass()) { 485 case CXXStaticCastExprClass: return "static_cast"; 486 case CXXDynamicCastExprClass: return "dynamic_cast"; 487 case CXXReinterpretCastExprClass: return "reinterpret_cast"; 488 case CXXConstCastExprClass: return "const_cast"; 489 default: return "<invalid cast>"; 490 } 491} 492 493CXXStaticCastExpr *CXXStaticCastExpr::Create(ASTContext &C, QualType T, 494 ExprValueKind VK, 495 CastKind K, Expr *Op, 496 const CXXCastPath *BasePath, 497 TypeSourceInfo *WrittenTy, 498 SourceLocation L, 499 SourceLocation RParenLoc) { 500 unsigned PathSize = (BasePath ? BasePath->size() : 0); 501 void *Buffer = C.Allocate(sizeof(CXXStaticCastExpr) 502 + PathSize * sizeof(CXXBaseSpecifier*)); 503 CXXStaticCastExpr *E = 504 new (Buffer) CXXStaticCastExpr(T, VK, K, Op, PathSize, WrittenTy, L, 505 RParenLoc); 506 if (PathSize) E->setCastPath(*BasePath); 507 return E; 508} 509 510CXXStaticCastExpr *CXXStaticCastExpr::CreateEmpty(ASTContext &C, 511 unsigned PathSize) { 512 void *Buffer = 513 C.Allocate(sizeof(CXXStaticCastExpr) + PathSize * sizeof(CXXBaseSpecifier*)); 514 return new (Buffer) CXXStaticCastExpr(EmptyShell(), PathSize); 515} 516 517CXXDynamicCastExpr *CXXDynamicCastExpr::Create(ASTContext &C, QualType T, 518 ExprValueKind VK, 519 CastKind K, Expr *Op, 520 const CXXCastPath *BasePath, 521 TypeSourceInfo *WrittenTy, 522 SourceLocation L, 523 SourceLocation RParenLoc) { 524 unsigned PathSize = (BasePath ? BasePath->size() : 0); 525 void *Buffer = C.Allocate(sizeof(CXXDynamicCastExpr) 526 + PathSize * sizeof(CXXBaseSpecifier*)); 527 CXXDynamicCastExpr *E = 528 new (Buffer) CXXDynamicCastExpr(T, VK, K, Op, PathSize, WrittenTy, L, 529 RParenLoc); 530 if (PathSize) E->setCastPath(*BasePath); 531 return E; 532} 533 534CXXDynamicCastExpr *CXXDynamicCastExpr::CreateEmpty(ASTContext &C, 535 unsigned PathSize) { 536 void *Buffer = 537 C.Allocate(sizeof(CXXDynamicCastExpr) + PathSize * sizeof(CXXBaseSpecifier*)); 538 return new (Buffer) CXXDynamicCastExpr(EmptyShell(), PathSize); 539} 540 541/// isAlwaysNull - Return whether the result of the dynamic_cast is proven 542/// to always be null. For example: 543/// 544/// struct A { }; 545/// struct B final : A { }; 546/// struct C { }; 547/// 548/// C *f(B* b) { return dynamic_cast<C*>(b); } 549bool CXXDynamicCastExpr::isAlwaysNull() const 550{ 551 QualType SrcType = getSubExpr()->getType(); 552 QualType DestType = getType(); 553 554 if (const PointerType *SrcPTy = SrcType->getAs<PointerType>()) { 555 SrcType = SrcPTy->getPointeeType(); 556 DestType = DestType->castAs<PointerType>()->getPointeeType(); 557 } 558 559 const CXXRecordDecl *SrcRD = 560 cast<CXXRecordDecl>(SrcType->castAs<RecordType>()->getDecl()); 561 562 if (!SrcRD->hasAttr<FinalAttr>()) 563 return false; 564 565 const CXXRecordDecl *DestRD = 566 cast<CXXRecordDecl>(DestType->castAs<RecordType>()->getDecl()); 567 568 return !DestRD->isDerivedFrom(SrcRD); 569} 570 571CXXReinterpretCastExpr * 572CXXReinterpretCastExpr::Create(ASTContext &C, QualType T, ExprValueKind VK, 573 CastKind K, Expr *Op, 574 const CXXCastPath *BasePath, 575 TypeSourceInfo *WrittenTy, SourceLocation L, 576 SourceLocation RParenLoc) { 577 unsigned PathSize = (BasePath ? BasePath->size() : 0); 578 void *Buffer = 579 C.Allocate(sizeof(CXXReinterpretCastExpr) + PathSize * sizeof(CXXBaseSpecifier*)); 580 CXXReinterpretCastExpr *E = 581 new (Buffer) CXXReinterpretCastExpr(T, VK, K, Op, PathSize, WrittenTy, L, 582 RParenLoc); 583 if (PathSize) E->setCastPath(*BasePath); 584 return E; 585} 586 587CXXReinterpretCastExpr * 588CXXReinterpretCastExpr::CreateEmpty(ASTContext &C, unsigned PathSize) { 589 void *Buffer = C.Allocate(sizeof(CXXReinterpretCastExpr) 590 + PathSize * sizeof(CXXBaseSpecifier*)); 591 return new (Buffer) CXXReinterpretCastExpr(EmptyShell(), PathSize); 592} 593 594CXXConstCastExpr *CXXConstCastExpr::Create(ASTContext &C, QualType T, 595 ExprValueKind VK, Expr *Op, 596 TypeSourceInfo *WrittenTy, 597 SourceLocation L, 598 SourceLocation RParenLoc) { 599 return new (C) CXXConstCastExpr(T, VK, Op, WrittenTy, L, RParenLoc); 600} 601 602CXXConstCastExpr *CXXConstCastExpr::CreateEmpty(ASTContext &C) { 603 return new (C) CXXConstCastExpr(EmptyShell()); 604} 605 606CXXFunctionalCastExpr * 607CXXFunctionalCastExpr::Create(ASTContext &C, QualType T, ExprValueKind VK, 608 TypeSourceInfo *Written, SourceLocation L, 609 CastKind K, Expr *Op, const CXXCastPath *BasePath, 610 SourceLocation R) { 611 unsigned PathSize = (BasePath ? BasePath->size() : 0); 612 void *Buffer = C.Allocate(sizeof(CXXFunctionalCastExpr) 613 + PathSize * sizeof(CXXBaseSpecifier*)); 614 CXXFunctionalCastExpr *E = 615 new (Buffer) CXXFunctionalCastExpr(T, VK, Written, L, K, Op, PathSize, R); 616 if (PathSize) E->setCastPath(*BasePath); 617 return E; 618} 619 620CXXFunctionalCastExpr * 621CXXFunctionalCastExpr::CreateEmpty(ASTContext &C, unsigned PathSize) { 622 void *Buffer = C.Allocate(sizeof(CXXFunctionalCastExpr) 623 + PathSize * sizeof(CXXBaseSpecifier*)); 624 return new (Buffer) CXXFunctionalCastExpr(EmptyShell(), PathSize); 625} 626 627UserDefinedLiteral::LiteralOperatorKind 628UserDefinedLiteral::getLiteralOperatorKind() const { 629 if (getNumArgs() == 0) 630 return LOK_Template; 631 if (getNumArgs() == 2) 632 return LOK_String; 633 634 assert(getNumArgs() == 1 && "unexpected #args in literal operator call"); 635 QualType ParamTy = 636 cast<FunctionDecl>(getCalleeDecl())->getParamDecl(0)->getType(); 637 if (ParamTy->isPointerType()) 638 return LOK_Raw; 639 if (ParamTy->isAnyCharacterType()) 640 return LOK_Character; 641 if (ParamTy->isIntegerType()) 642 return LOK_Integer; 643 if (ParamTy->isFloatingType()) 644 return LOK_Floating; 645 646 llvm_unreachable("unknown kind of literal operator"); 647} 648 649Expr *UserDefinedLiteral::getCookedLiteral() { 650#ifndef NDEBUG 651 LiteralOperatorKind LOK = getLiteralOperatorKind(); 652 assert(LOK != LOK_Template && LOK != LOK_Raw && "not a cooked literal"); 653#endif 654 return getArg(0); 655} 656 657const IdentifierInfo *UserDefinedLiteral::getUDSuffix() const { 658 return cast<FunctionDecl>(getCalleeDecl())->getLiteralIdentifier(); 659} 660 661CXXDefaultArgExpr * 662CXXDefaultArgExpr::Create(ASTContext &C, SourceLocation Loc, 663 ParmVarDecl *Param, Expr *SubExpr) { 664 void *Mem = C.Allocate(sizeof(CXXDefaultArgExpr) + sizeof(Stmt *)); 665 return new (Mem) CXXDefaultArgExpr(CXXDefaultArgExprClass, Loc, Param, 666 SubExpr); 667} 668 669CXXTemporary *CXXTemporary::Create(ASTContext &C, 670 const CXXDestructorDecl *Destructor) { 671 return new (C) CXXTemporary(Destructor); 672} 673 674CXXBindTemporaryExpr *CXXBindTemporaryExpr::Create(ASTContext &C, 675 CXXTemporary *Temp, 676 Expr* SubExpr) { 677 assert((SubExpr->getType()->isRecordType() || 678 SubExpr->getType()->isArrayType()) && 679 "Expression bound to a temporary must have record or array type!"); 680 681 return new (C) CXXBindTemporaryExpr(Temp, SubExpr); 682} 683 684CXXTemporaryObjectExpr::CXXTemporaryObjectExpr(ASTContext &C, 685 CXXConstructorDecl *Cons, 686 TypeSourceInfo *Type, 687 Expr **Args, 688 unsigned NumArgs, 689 SourceRange parenRange, 690 bool HadMultipleCandidates, 691 bool ZeroInitialization) 692 : CXXConstructExpr(C, CXXTemporaryObjectExprClass, 693 Type->getType().getNonReferenceType(), 694 Type->getTypeLoc().getBeginLoc(), 695 Cons, false, Args, NumArgs, 696 HadMultipleCandidates, /*FIXME*/false, ZeroInitialization, 697 CXXConstructExpr::CK_Complete, parenRange), 698 Type(Type) { 699} 700 701SourceRange CXXTemporaryObjectExpr::getSourceRange() const { 702 return SourceRange(Type->getTypeLoc().getBeginLoc(), 703 getParenRange().getEnd()); 704} 705 706CXXConstructExpr *CXXConstructExpr::Create(ASTContext &C, QualType T, 707 SourceLocation Loc, 708 CXXConstructorDecl *D, bool Elidable, 709 Expr **Args, unsigned NumArgs, 710 bool HadMultipleCandidates, 711 bool ListInitialization, 712 bool ZeroInitialization, 713 ConstructionKind ConstructKind, 714 SourceRange ParenRange) { 715 return new (C) CXXConstructExpr(C, CXXConstructExprClass, T, Loc, D, 716 Elidable, Args, NumArgs, 717 HadMultipleCandidates, ListInitialization, 718 ZeroInitialization, ConstructKind, 719 ParenRange); 720} 721 722CXXConstructExpr::CXXConstructExpr(ASTContext &C, StmtClass SC, QualType T, 723 SourceLocation Loc, 724 CXXConstructorDecl *D, bool elidable, 725 Expr **args, unsigned numargs, 726 bool HadMultipleCandidates, 727 bool ListInitialization, 728 bool ZeroInitialization, 729 ConstructionKind ConstructKind, 730 SourceRange ParenRange) 731 : Expr(SC, T, VK_RValue, OK_Ordinary, 732 T->isDependentType(), T->isDependentType(), 733 T->isInstantiationDependentType(), 734 T->containsUnexpandedParameterPack()), 735 Constructor(D), Loc(Loc), ParenRange(ParenRange), NumArgs(numargs), 736 Elidable(elidable), HadMultipleCandidates(HadMultipleCandidates), 737 ListInitialization(ListInitialization), 738 ZeroInitialization(ZeroInitialization), 739 ConstructKind(ConstructKind), Args(0) 740{ 741 if (NumArgs) { 742 Args = new (C) Stmt*[NumArgs]; 743 744 for (unsigned i = 0; i != NumArgs; ++i) { 745 assert(args[i] && "NULL argument in CXXConstructExpr"); 746 747 if (args[i]->isValueDependent()) 748 ExprBits.ValueDependent = true; 749 if (args[i]->isInstantiationDependent()) 750 ExprBits.InstantiationDependent = true; 751 if (args[i]->containsUnexpandedParameterPack()) 752 ExprBits.ContainsUnexpandedParameterPack = true; 753 754 Args[i] = args[i]; 755 } 756 } 757} 758 759LambdaExpr::Capture::Capture(SourceLocation Loc, bool Implicit, 760 LambdaCaptureKind Kind, VarDecl *Var, 761 SourceLocation EllipsisLoc) 762 : VarAndBits(Var, 0), Loc(Loc), EllipsisLoc(EllipsisLoc) 763{ 764 unsigned Bits = 0; 765 if (Implicit) 766 Bits |= Capture_Implicit; 767 768 switch (Kind) { 769 case LCK_This: 770 assert(Var == 0 && "'this' capture cannot have a variable!"); 771 break; 772 773 case LCK_ByCopy: 774 Bits |= Capture_ByCopy; 775 // Fall through 776 case LCK_ByRef: 777 assert(Var && "capture must have a variable!"); 778 break; 779 } 780 VarAndBits.setInt(Bits); 781} 782 783LambdaCaptureKind LambdaExpr::Capture::getCaptureKind() const { 784 if (capturesThis()) 785 return LCK_This; 786 787 return (VarAndBits.getInt() & Capture_ByCopy)? LCK_ByCopy : LCK_ByRef; 788} 789 790LambdaExpr::LambdaExpr(QualType T, 791 SourceRange IntroducerRange, 792 LambdaCaptureDefault CaptureDefault, 793 ArrayRef<Capture> Captures, 794 bool ExplicitParams, 795 bool ExplicitResultType, 796 ArrayRef<Expr *> CaptureInits, 797 ArrayRef<VarDecl *> ArrayIndexVars, 798 ArrayRef<unsigned> ArrayIndexStarts, 799 SourceLocation ClosingBrace, 800 unsigned ManglingNumber, 801 Decl *ContextDecl) 802 : Expr(LambdaExprClass, T, VK_RValue, OK_Ordinary, 803 T->isDependentType(), T->isDependentType(), T->isDependentType(), 804 /*ContainsUnexpandedParameterPack=*/false), 805 IntroducerRange(IntroducerRange), 806 NumCaptures(Captures.size()), 807 CaptureDefault(CaptureDefault), 808 ExplicitParams(ExplicitParams), 809 ExplicitResultType(ExplicitResultType), 810 ClosingBrace(ClosingBrace) 811{ 812 assert(CaptureInits.size() == Captures.size() && "Wrong number of arguments"); 813 CXXRecordDecl *Class = getLambdaClass(); 814 CXXRecordDecl::LambdaDefinitionData &Data = Class->getLambdaData(); 815 816 // FIXME: Propagate "has unexpanded parameter pack" bit. 817 818 // Copy captures. 819 ASTContext &Context = Class->getASTContext(); 820 Data.NumCaptures = NumCaptures; 821 Data.NumExplicitCaptures = 0; 822 Data.ManglingNumber = ManglingNumber; 823 Data.ContextDecl = ContextDecl; 824 Data.Captures = (Capture *)Context.Allocate(sizeof(Capture) * NumCaptures); 825 Capture *ToCapture = Data.Captures; 826 for (unsigned I = 0, N = Captures.size(); I != N; ++I) { 827 if (Captures[I].isExplicit()) 828 ++Data.NumExplicitCaptures; 829 830 *ToCapture++ = Captures[I]; 831 } 832 833 // Copy initialization expressions for the non-static data members. 834 Stmt **Stored = getStoredStmts(); 835 for (unsigned I = 0, N = CaptureInits.size(); I != N; ++I) 836 *Stored++ = CaptureInits[I]; 837 838 // Copy the body of the lambda. 839 *Stored++ = getCallOperator()->getBody(); 840 841 // Copy the array index variables, if any. 842 HasArrayIndexVars = !ArrayIndexVars.empty(); 843 if (HasArrayIndexVars) { 844 assert(ArrayIndexStarts.size() == NumCaptures); 845 memcpy(getArrayIndexVars(), ArrayIndexVars.data(), 846 sizeof(VarDecl *) * ArrayIndexVars.size()); 847 memcpy(getArrayIndexStarts(), ArrayIndexStarts.data(), 848 sizeof(unsigned) * Captures.size()); 849 getArrayIndexStarts()[Captures.size()] = ArrayIndexVars.size(); 850 } 851 852 if (ManglingNumber) 853 Class->ClearLinkageCache(); 854} 855 856LambdaExpr *LambdaExpr::Create(ASTContext &Context, 857 CXXRecordDecl *Class, 858 SourceRange IntroducerRange, 859 LambdaCaptureDefault CaptureDefault, 860 ArrayRef<Capture> Captures, 861 bool ExplicitParams, 862 bool ExplicitResultType, 863 ArrayRef<Expr *> CaptureInits, 864 ArrayRef<VarDecl *> ArrayIndexVars, 865 ArrayRef<unsigned> ArrayIndexStarts, 866 SourceLocation ClosingBrace, 867 unsigned ManglingNumber, 868 Decl *ContextDecl) { 869 // Determine the type of the expression (i.e., the type of the 870 // function object we're creating). 871 QualType T = Context.getTypeDeclType(Class); 872 873 unsigned Size = sizeof(LambdaExpr) + sizeof(Stmt *) * (Captures.size() + 1); 874 if (!ArrayIndexVars.empty()) 875 Size += sizeof(VarDecl *) * ArrayIndexVars.size() 876 + sizeof(unsigned) * (Captures.size() + 1); 877 void *Mem = Context.Allocate(Size); 878 return new (Mem) LambdaExpr(T, IntroducerRange, CaptureDefault, 879 Captures, ExplicitParams, ExplicitResultType, 880 CaptureInits, ArrayIndexVars, ArrayIndexStarts, 881 ClosingBrace, ManglingNumber, ContextDecl); 882} 883 884LambdaExpr *LambdaExpr::CreateDeserialized(ASTContext &C, unsigned NumCaptures, 885 unsigned NumArrayIndexVars) { 886 unsigned Size = sizeof(LambdaExpr) + sizeof(Stmt *) * (NumCaptures + 1); 887 if (NumArrayIndexVars) 888 Size += sizeof(VarDecl) * NumArrayIndexVars 889 + sizeof(unsigned) * (NumCaptures + 1); 890 void *Mem = C.Allocate(Size); 891 return new (Mem) LambdaExpr(EmptyShell(), NumCaptures, NumArrayIndexVars > 0); 892} 893 894LambdaExpr::capture_iterator LambdaExpr::capture_begin() const { 895 return getLambdaClass()->getLambdaData().Captures; 896} 897 898LambdaExpr::capture_iterator LambdaExpr::capture_end() const { 899 return capture_begin() + NumCaptures; 900} 901 902LambdaExpr::capture_iterator LambdaExpr::explicit_capture_begin() const { 903 return capture_begin(); 904} 905 906LambdaExpr::capture_iterator LambdaExpr::explicit_capture_end() const { 907 struct CXXRecordDecl::LambdaDefinitionData &Data 908 = getLambdaClass()->getLambdaData(); 909 return Data.Captures + Data.NumExplicitCaptures; 910} 911 912LambdaExpr::capture_iterator LambdaExpr::implicit_capture_begin() const { 913 return explicit_capture_end(); 914} 915 916LambdaExpr::capture_iterator LambdaExpr::implicit_capture_end() const { 917 return capture_end(); 918} 919 920ArrayRef<VarDecl *> 921LambdaExpr::getCaptureInitIndexVars(capture_init_iterator Iter) const { 922 assert(HasArrayIndexVars && "No array index-var data?"); 923 924 unsigned Index = Iter - capture_init_begin(); 925 assert(Index < getLambdaClass()->getLambdaData().NumCaptures && 926 "Capture index out-of-range"); 927 VarDecl **IndexVars = getArrayIndexVars(); 928 unsigned *IndexStarts = getArrayIndexStarts(); 929 return ArrayRef<VarDecl *>(IndexVars + IndexStarts[Index], 930 IndexVars + IndexStarts[Index + 1]); 931} 932 933CXXRecordDecl *LambdaExpr::getLambdaClass() const { 934 return getType()->getAsCXXRecordDecl(); 935} 936 937CXXMethodDecl *LambdaExpr::getCallOperator() const { 938 CXXRecordDecl *Record = getLambdaClass(); 939 DeclarationName Name 940 = Record->getASTContext().DeclarationNames.getCXXOperatorName(OO_Call); 941 DeclContext::lookup_result Calls = Record->lookup(Name); 942 assert(Calls.first != Calls.second && "Missing lambda call operator!"); 943 CXXMethodDecl *Result = cast<CXXMethodDecl>(*Calls.first++); 944 assert(Calls.first == Calls.second && "More than lambda one call operator?"); 945 return Result; 946} 947 948CompoundStmt *LambdaExpr::getBody() const { 949 if (!getStoredStmts()[NumCaptures]) 950 getStoredStmts()[NumCaptures] = getCallOperator()->getBody(); 951 952 return reinterpret_cast<CompoundStmt *>(getStoredStmts()[NumCaptures]); 953} 954 955bool LambdaExpr::isMutable() const { 956 return (getCallOperator()->getTypeQualifiers() & Qualifiers::Const) == 0; 957} 958 959ExprWithCleanups::ExprWithCleanups(Expr *subexpr, 960 ArrayRef<CleanupObject> objects) 961 : Expr(ExprWithCleanupsClass, subexpr->getType(), 962 subexpr->getValueKind(), subexpr->getObjectKind(), 963 subexpr->isTypeDependent(), subexpr->isValueDependent(), 964 subexpr->isInstantiationDependent(), 965 subexpr->containsUnexpandedParameterPack()), 966 SubExpr(subexpr) { 967 ExprWithCleanupsBits.NumObjects = objects.size(); 968 for (unsigned i = 0, e = objects.size(); i != e; ++i) 969 getObjectsBuffer()[i] = objects[i]; 970} 971 972ExprWithCleanups *ExprWithCleanups::Create(ASTContext &C, Expr *subexpr, 973 ArrayRef<CleanupObject> objects) { 974 size_t size = sizeof(ExprWithCleanups) 975 + objects.size() * sizeof(CleanupObject); 976 void *buffer = C.Allocate(size, llvm::alignOf<ExprWithCleanups>()); 977 return new (buffer) ExprWithCleanups(subexpr, objects); 978} 979 980ExprWithCleanups::ExprWithCleanups(EmptyShell empty, unsigned numObjects) 981 : Expr(ExprWithCleanupsClass, empty) { 982 ExprWithCleanupsBits.NumObjects = numObjects; 983} 984 985ExprWithCleanups *ExprWithCleanups::Create(ASTContext &C, EmptyShell empty, 986 unsigned numObjects) { 987 size_t size = sizeof(ExprWithCleanups) + numObjects * sizeof(CleanupObject); 988 void *buffer = C.Allocate(size, llvm::alignOf<ExprWithCleanups>()); 989 return new (buffer) ExprWithCleanups(empty, numObjects); 990} 991 992CXXUnresolvedConstructExpr::CXXUnresolvedConstructExpr(TypeSourceInfo *Type, 993 SourceLocation LParenLoc, 994 Expr **Args, 995 unsigned NumArgs, 996 SourceLocation RParenLoc) 997 : Expr(CXXUnresolvedConstructExprClass, 998 Type->getType().getNonReferenceType(), 999 (Type->getType()->isLValueReferenceType() ? VK_LValue 1000 :Type->getType()->isRValueReferenceType()? VK_XValue 1001 :VK_RValue), 1002 OK_Ordinary, 1003 Type->getType()->isDependentType(), true, true, 1004 Type->getType()->containsUnexpandedParameterPack()), 1005 Type(Type), 1006 LParenLoc(LParenLoc), 1007 RParenLoc(RParenLoc), 1008 NumArgs(NumArgs) { 1009 Stmt **StoredArgs = reinterpret_cast<Stmt **>(this + 1); 1010 for (unsigned I = 0; I != NumArgs; ++I) { 1011 if (Args[I]->containsUnexpandedParameterPack()) 1012 ExprBits.ContainsUnexpandedParameterPack = true; 1013 1014 StoredArgs[I] = Args[I]; 1015 } 1016} 1017 1018CXXUnresolvedConstructExpr * 1019CXXUnresolvedConstructExpr::Create(ASTContext &C, 1020 TypeSourceInfo *Type, 1021 SourceLocation LParenLoc, 1022 Expr **Args, 1023 unsigned NumArgs, 1024 SourceLocation RParenLoc) { 1025 void *Mem = C.Allocate(sizeof(CXXUnresolvedConstructExpr) + 1026 sizeof(Expr *) * NumArgs); 1027 return new (Mem) CXXUnresolvedConstructExpr(Type, LParenLoc, 1028 Args, NumArgs, RParenLoc); 1029} 1030 1031CXXUnresolvedConstructExpr * 1032CXXUnresolvedConstructExpr::CreateEmpty(ASTContext &C, unsigned NumArgs) { 1033 Stmt::EmptyShell Empty; 1034 void *Mem = C.Allocate(sizeof(CXXUnresolvedConstructExpr) + 1035 sizeof(Expr *) * NumArgs); 1036 return new (Mem) CXXUnresolvedConstructExpr(Empty, NumArgs); 1037} 1038 1039SourceRange CXXUnresolvedConstructExpr::getSourceRange() const { 1040 return SourceRange(Type->getTypeLoc().getBeginLoc(), RParenLoc); 1041} 1042 1043CXXDependentScopeMemberExpr::CXXDependentScopeMemberExpr(ASTContext &C, 1044 Expr *Base, QualType BaseType, 1045 bool IsArrow, 1046 SourceLocation OperatorLoc, 1047 NestedNameSpecifierLoc QualifierLoc, 1048 SourceLocation TemplateKWLoc, 1049 NamedDecl *FirstQualifierFoundInScope, 1050 DeclarationNameInfo MemberNameInfo, 1051 const TemplateArgumentListInfo *TemplateArgs) 1052 : Expr(CXXDependentScopeMemberExprClass, C.DependentTy, 1053 VK_LValue, OK_Ordinary, true, true, true, 1054 ((Base && Base->containsUnexpandedParameterPack()) || 1055 (QualifierLoc && 1056 QualifierLoc.getNestedNameSpecifier() 1057 ->containsUnexpandedParameterPack()) || 1058 MemberNameInfo.containsUnexpandedParameterPack())), 1059 Base(Base), BaseType(BaseType), IsArrow(IsArrow), 1060 HasTemplateKWAndArgsInfo(TemplateArgs != 0 || TemplateKWLoc.isValid()), 1061 OperatorLoc(OperatorLoc), QualifierLoc(QualifierLoc), 1062 FirstQualifierFoundInScope(FirstQualifierFoundInScope), 1063 MemberNameInfo(MemberNameInfo) { 1064 if (TemplateArgs) { 1065 bool Dependent = true; 1066 bool InstantiationDependent = true; 1067 bool ContainsUnexpandedParameterPack = false; 1068 getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc, *TemplateArgs, 1069 Dependent, 1070 InstantiationDependent, 1071 ContainsUnexpandedParameterPack); 1072 if (ContainsUnexpandedParameterPack) 1073 ExprBits.ContainsUnexpandedParameterPack = true; 1074 } else if (TemplateKWLoc.isValid()) { 1075 getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc); 1076 } 1077} 1078 1079CXXDependentScopeMemberExpr::CXXDependentScopeMemberExpr(ASTContext &C, 1080 Expr *Base, QualType BaseType, 1081 bool IsArrow, 1082 SourceLocation OperatorLoc, 1083 NestedNameSpecifierLoc QualifierLoc, 1084 NamedDecl *FirstQualifierFoundInScope, 1085 DeclarationNameInfo MemberNameInfo) 1086 : Expr(CXXDependentScopeMemberExprClass, C.DependentTy, 1087 VK_LValue, OK_Ordinary, true, true, true, 1088 ((Base && Base->containsUnexpandedParameterPack()) || 1089 (QualifierLoc && 1090 QualifierLoc.getNestedNameSpecifier()-> 1091 containsUnexpandedParameterPack()) || 1092 MemberNameInfo.containsUnexpandedParameterPack())), 1093 Base(Base), BaseType(BaseType), IsArrow(IsArrow), 1094 HasTemplateKWAndArgsInfo(false), 1095 OperatorLoc(OperatorLoc), QualifierLoc(QualifierLoc), 1096 FirstQualifierFoundInScope(FirstQualifierFoundInScope), 1097 MemberNameInfo(MemberNameInfo) { } 1098 1099CXXDependentScopeMemberExpr * 1100CXXDependentScopeMemberExpr::Create(ASTContext &C, 1101 Expr *Base, QualType BaseType, bool IsArrow, 1102 SourceLocation OperatorLoc, 1103 NestedNameSpecifierLoc QualifierLoc, 1104 SourceLocation TemplateKWLoc, 1105 NamedDecl *FirstQualifierFoundInScope, 1106 DeclarationNameInfo MemberNameInfo, 1107 const TemplateArgumentListInfo *TemplateArgs) { 1108 if (!TemplateArgs && !TemplateKWLoc.isValid()) 1109 return new (C) CXXDependentScopeMemberExpr(C, Base, BaseType, 1110 IsArrow, OperatorLoc, 1111 QualifierLoc, 1112 FirstQualifierFoundInScope, 1113 MemberNameInfo); 1114 1115 unsigned NumTemplateArgs = TemplateArgs ? TemplateArgs->size() : 0; 1116 std::size_t size = sizeof(CXXDependentScopeMemberExpr) 1117 + ASTTemplateKWAndArgsInfo::sizeFor(NumTemplateArgs); 1118 1119 void *Mem = C.Allocate(size, llvm::alignOf<CXXDependentScopeMemberExpr>()); 1120 return new (Mem) CXXDependentScopeMemberExpr(C, Base, BaseType, 1121 IsArrow, OperatorLoc, 1122 QualifierLoc, 1123 TemplateKWLoc, 1124 FirstQualifierFoundInScope, 1125 MemberNameInfo, TemplateArgs); 1126} 1127 1128CXXDependentScopeMemberExpr * 1129CXXDependentScopeMemberExpr::CreateEmpty(ASTContext &C, 1130 bool HasTemplateKWAndArgsInfo, 1131 unsigned NumTemplateArgs) { 1132 if (!HasTemplateKWAndArgsInfo) 1133 return new (C) CXXDependentScopeMemberExpr(C, 0, QualType(), 1134 0, SourceLocation(), 1135 NestedNameSpecifierLoc(), 0, 1136 DeclarationNameInfo()); 1137 1138 std::size_t size = sizeof(CXXDependentScopeMemberExpr) + 1139 ASTTemplateKWAndArgsInfo::sizeFor(NumTemplateArgs); 1140 void *Mem = C.Allocate(size, llvm::alignOf<CXXDependentScopeMemberExpr>()); 1141 CXXDependentScopeMemberExpr *E 1142 = new (Mem) CXXDependentScopeMemberExpr(C, 0, QualType(), 1143 0, SourceLocation(), 1144 NestedNameSpecifierLoc(), 1145 SourceLocation(), 0, 1146 DeclarationNameInfo(), 0); 1147 E->HasTemplateKWAndArgsInfo = true; 1148 return E; 1149} 1150 1151bool CXXDependentScopeMemberExpr::isImplicitAccess() const { 1152 if (Base == 0) 1153 return true; 1154 1155 return cast<Expr>(Base)->isImplicitCXXThis(); 1156} 1157 1158static bool hasOnlyNonStaticMemberFunctions(UnresolvedSetIterator begin, 1159 UnresolvedSetIterator end) { 1160 do { 1161 NamedDecl *decl = *begin; 1162 if (isa<UnresolvedUsingValueDecl>(decl)) 1163 return false; 1164 if (isa<UsingShadowDecl>(decl)) 1165 decl = cast<UsingShadowDecl>(decl)->getUnderlyingDecl(); 1166 1167 // Unresolved member expressions should only contain methods and 1168 // method templates. 1169 assert(isa<CXXMethodDecl>(decl) || isa<FunctionTemplateDecl>(decl)); 1170 1171 if (isa<FunctionTemplateDecl>(decl)) 1172 decl = cast<FunctionTemplateDecl>(decl)->getTemplatedDecl(); 1173 if (cast<CXXMethodDecl>(decl)->isStatic()) 1174 return false; 1175 } while (++begin != end); 1176 1177 return true; 1178} 1179 1180UnresolvedMemberExpr::UnresolvedMemberExpr(ASTContext &C, 1181 bool HasUnresolvedUsing, 1182 Expr *Base, QualType BaseType, 1183 bool IsArrow, 1184 SourceLocation OperatorLoc, 1185 NestedNameSpecifierLoc QualifierLoc, 1186 SourceLocation TemplateKWLoc, 1187 const DeclarationNameInfo &MemberNameInfo, 1188 const TemplateArgumentListInfo *TemplateArgs, 1189 UnresolvedSetIterator Begin, 1190 UnresolvedSetIterator End) 1191 : OverloadExpr(UnresolvedMemberExprClass, C, QualifierLoc, TemplateKWLoc, 1192 MemberNameInfo, TemplateArgs, Begin, End, 1193 // Dependent 1194 ((Base && Base->isTypeDependent()) || 1195 BaseType->isDependentType()), 1196 ((Base && Base->isInstantiationDependent()) || 1197 BaseType->isInstantiationDependentType()), 1198 // Contains unexpanded parameter pack 1199 ((Base && Base->containsUnexpandedParameterPack()) || 1200 BaseType->containsUnexpandedParameterPack())), 1201 IsArrow(IsArrow), HasUnresolvedUsing(HasUnresolvedUsing), 1202 Base(Base), BaseType(BaseType), OperatorLoc(OperatorLoc) { 1203 1204 // Check whether all of the members are non-static member functions, 1205 // and if so, mark give this bound-member type instead of overload type. 1206 if (hasOnlyNonStaticMemberFunctions(Begin, End)) 1207 setType(C.BoundMemberTy); 1208} 1209 1210bool UnresolvedMemberExpr::isImplicitAccess() const { 1211 if (Base == 0) 1212 return true; 1213 1214 return cast<Expr>(Base)->isImplicitCXXThis(); 1215} 1216 1217UnresolvedMemberExpr * 1218UnresolvedMemberExpr::Create(ASTContext &C, 1219 bool HasUnresolvedUsing, 1220 Expr *Base, QualType BaseType, bool IsArrow, 1221 SourceLocation OperatorLoc, 1222 NestedNameSpecifierLoc QualifierLoc, 1223 SourceLocation TemplateKWLoc, 1224 const DeclarationNameInfo &MemberNameInfo, 1225 const TemplateArgumentListInfo *TemplateArgs, 1226 UnresolvedSetIterator Begin, 1227 UnresolvedSetIterator End) { 1228 std::size_t size = sizeof(UnresolvedMemberExpr); 1229 if (TemplateArgs) 1230 size += ASTTemplateKWAndArgsInfo::sizeFor(TemplateArgs->size()); 1231 else if (TemplateKWLoc.isValid()) 1232 size += ASTTemplateKWAndArgsInfo::sizeFor(0); 1233 1234 void *Mem = C.Allocate(size, llvm::alignOf<UnresolvedMemberExpr>()); 1235 return new (Mem) UnresolvedMemberExpr(C, 1236 HasUnresolvedUsing, Base, BaseType, 1237 IsArrow, OperatorLoc, QualifierLoc, TemplateKWLoc, 1238 MemberNameInfo, TemplateArgs, Begin, End); 1239} 1240 1241UnresolvedMemberExpr * 1242UnresolvedMemberExpr::CreateEmpty(ASTContext &C, bool HasTemplateKWAndArgsInfo, 1243 unsigned NumTemplateArgs) { 1244 std::size_t size = sizeof(UnresolvedMemberExpr); 1245 if (HasTemplateKWAndArgsInfo) 1246 size += ASTTemplateKWAndArgsInfo::sizeFor(NumTemplateArgs); 1247 1248 void *Mem = C.Allocate(size, llvm::alignOf<UnresolvedMemberExpr>()); 1249 UnresolvedMemberExpr *E = new (Mem) UnresolvedMemberExpr(EmptyShell()); 1250 E->HasTemplateKWAndArgsInfo = HasTemplateKWAndArgsInfo; 1251 return E; 1252} 1253 1254CXXRecordDecl *UnresolvedMemberExpr::getNamingClass() const { 1255 // Unlike for UnresolvedLookupExpr, it is very easy to re-derive this. 1256 1257 // If there was a nested name specifier, it names the naming class. 1258 // It can't be dependent: after all, we were actually able to do the 1259 // lookup. 1260 CXXRecordDecl *Record = 0; 1261 if (getQualifier()) { 1262 const Type *T = getQualifier()->getAsType(); 1263 assert(T && "qualifier in member expression does not name type"); 1264 Record = T->getAsCXXRecordDecl(); 1265 assert(Record && "qualifier in member expression does not name record"); 1266 } 1267 // Otherwise the naming class must have been the base class. 1268 else { 1269 QualType BaseType = getBaseType().getNonReferenceType(); 1270 if (isArrow()) { 1271 const PointerType *PT = BaseType->getAs<PointerType>(); 1272 assert(PT && "base of arrow member access is not pointer"); 1273 BaseType = PT->getPointeeType(); 1274 } 1275 1276 Record = BaseType->getAsCXXRecordDecl(); 1277 assert(Record && "base of member expression does not name record"); 1278 } 1279 1280 return Record; 1281} 1282 1283SubstNonTypeTemplateParmPackExpr:: 1284SubstNonTypeTemplateParmPackExpr(QualType T, 1285 NonTypeTemplateParmDecl *Param, 1286 SourceLocation NameLoc, 1287 const TemplateArgument &ArgPack) 1288 : Expr(SubstNonTypeTemplateParmPackExprClass, T, VK_RValue, OK_Ordinary, 1289 true, true, true, true), 1290 Param(Param), Arguments(ArgPack.pack_begin()), 1291 NumArguments(ArgPack.pack_size()), NameLoc(NameLoc) { } 1292 1293TemplateArgument SubstNonTypeTemplateParmPackExpr::getArgumentPack() const { 1294 return TemplateArgument(Arguments, NumArguments); 1295} 1296 1297TypeTraitExpr::TypeTraitExpr(QualType T, SourceLocation Loc, TypeTrait Kind, 1298 ArrayRef<TypeSourceInfo *> Args, 1299 SourceLocation RParenLoc, 1300 bool Value) 1301 : Expr(TypeTraitExprClass, T, VK_RValue, OK_Ordinary, 1302 /*TypeDependent=*/false, 1303 /*ValueDependent=*/false, 1304 /*InstantiationDependent=*/false, 1305 /*ContainsUnexpandedParameterPack=*/false), 1306 Loc(Loc), RParenLoc(RParenLoc) 1307{ 1308 TypeTraitExprBits.Kind = Kind; 1309 TypeTraitExprBits.Value = Value; 1310 TypeTraitExprBits.NumArgs = Args.size(); 1311 1312 TypeSourceInfo **ToArgs = getTypeSourceInfos(); 1313 1314 for (unsigned I = 0, N = Args.size(); I != N; ++I) { 1315 if (Args[I]->getType()->isDependentType()) 1316 setValueDependent(true); 1317 if (Args[I]->getType()->isInstantiationDependentType()) 1318 setInstantiationDependent(true); 1319 if (Args[I]->getType()->containsUnexpandedParameterPack()) 1320 setContainsUnexpandedParameterPack(true); 1321 1322 ToArgs[I] = Args[I]; 1323 } 1324} 1325 1326TypeTraitExpr *TypeTraitExpr::Create(ASTContext &C, QualType T, 1327 SourceLocation Loc, 1328 TypeTrait Kind, 1329 ArrayRef<TypeSourceInfo *> Args, 1330 SourceLocation RParenLoc, 1331 bool Value) { 1332 unsigned Size = sizeof(TypeTraitExpr) + sizeof(TypeSourceInfo*) * Args.size(); 1333 void *Mem = C.Allocate(Size); 1334 return new (Mem) TypeTraitExpr(T, Loc, Kind, Args, RParenLoc, Value); 1335} 1336 1337TypeTraitExpr *TypeTraitExpr::CreateDeserialized(ASTContext &C, 1338 unsigned NumArgs) { 1339 unsigned Size = sizeof(TypeTraitExpr) + sizeof(TypeSourceInfo*) * NumArgs; 1340 void *Mem = C.Allocate(Size); 1341 return new (Mem) TypeTraitExpr(EmptyShell()); 1342} 1343 1344void ArrayTypeTraitExpr::anchor() { } 1345