ExprCXX.h revision c65f03498f6c59b5ae5c14086f49ae6e7a173624
1//===--- ExprCXX.h - Classes for representing expressions -------*- 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 Expr interface and subclasses for C++ expressions. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_EXPRCXX_H 15#define LLVM_CLANG_AST_EXPRCXX_H 16 17#include "clang/AST/Decl.h" 18#include "clang/AST/Expr.h" 19#include "clang/AST/TemplateBase.h" 20#include "clang/AST/UnresolvedSet.h" 21#include "clang/Basic/ExpressionTraits.h" 22#include "clang/Basic/Lambda.h" 23#include "clang/Basic/TypeTraits.h" 24#include "llvm/Support/Compiler.h" 25 26namespace clang { 27 28class CXXConstructorDecl; 29class CXXDestructorDecl; 30class CXXMethodDecl; 31class CXXTemporary; 32class MSPropertyDecl; 33class TemplateArgumentListInfo; 34class UuidAttr; 35 36//===--------------------------------------------------------------------===// 37// C++ Expressions. 38//===--------------------------------------------------------------------===// 39 40/// \brief A call to an overloaded operator written using operator 41/// syntax. 42/// 43/// Represents a call to an overloaded operator written using operator 44/// syntax, e.g., "x + y" or "*p". While semantically equivalent to a 45/// normal call, this AST node provides better information about the 46/// syntactic representation of the call. 47/// 48/// In a C++ template, this expression node kind will be used whenever 49/// any of the arguments are type-dependent. In this case, the 50/// function itself will be a (possibly empty) set of functions and 51/// function templates that were found by name lookup at template 52/// definition time. 53class CXXOperatorCallExpr : public CallExpr { 54 /// \brief The overloaded operator. 55 OverloadedOperatorKind Operator; 56 SourceRange Range; 57 58 // Record the FP_CONTRACT state that applies to this operator call. Only 59 // meaningful for floating point types. For other types this value can be 60 // set to false. 61 unsigned FPContractable : 1; 62 63 SourceRange getSourceRangeImpl() const LLVM_READONLY; 64public: 65 CXXOperatorCallExpr(ASTContext& C, OverloadedOperatorKind Op, Expr *fn, 66 ArrayRef<Expr*> args, QualType t, ExprValueKind VK, 67 SourceLocation operatorloc, bool fpContractable) 68 : CallExpr(C, CXXOperatorCallExprClass, fn, 0, args, t, VK, 69 operatorloc), 70 Operator(Op), FPContractable(fpContractable) { 71 Range = getSourceRangeImpl(); 72 } 73 explicit CXXOperatorCallExpr(ASTContext& C, EmptyShell Empty) : 74 CallExpr(C, CXXOperatorCallExprClass, Empty) { } 75 76 77 /// getOperator - Returns the kind of overloaded operator that this 78 /// expression refers to. 79 OverloadedOperatorKind getOperator() const { return Operator; } 80 81 /// getOperatorLoc - Returns the location of the operator symbol in 82 /// the expression. When @c getOperator()==OO_Call, this is the 83 /// location of the right parentheses; when @c 84 /// getOperator()==OO_Subscript, this is the location of the right 85 /// bracket. 86 SourceLocation getOperatorLoc() const { return getRParenLoc(); } 87 88 SourceLocation getLocStart() const LLVM_READONLY { return Range.getBegin(); } 89 SourceLocation getLocEnd() const LLVM_READONLY { return Range.getEnd(); } 90 SourceRange getSourceRange() const { return Range; } 91 92 static bool classof(const Stmt *T) { 93 return T->getStmtClass() == CXXOperatorCallExprClass; 94 } 95 96 // Set the FP contractability status of this operator. Only meaningful for 97 // operations on floating point types. 98 void setFPContractable(bool FPC) { FPContractable = FPC; } 99 100 // Get the FP contractability status of this operator. Only meaningful for 101 // operations on floating point types. 102 bool isFPContractable() const { return FPContractable; } 103 104 friend class ASTStmtReader; 105 friend class ASTStmtWriter; 106}; 107 108/// CXXMemberCallExpr - Represents a call to a member function that 109/// may be written either with member call syntax (e.g., "obj.func()" 110/// or "objptr->func()") or with normal function-call syntax 111/// ("func()") within a member function that ends up calling a member 112/// function. The callee in either case is a MemberExpr that contains 113/// both the object argument and the member function, while the 114/// arguments are the arguments within the parentheses (not including 115/// the object argument). 116class CXXMemberCallExpr : public CallExpr { 117public: 118 CXXMemberCallExpr(ASTContext &C, Expr *fn, ArrayRef<Expr*> args, 119 QualType t, ExprValueKind VK, SourceLocation RP) 120 : CallExpr(C, CXXMemberCallExprClass, fn, 0, args, t, VK, RP) {} 121 122 CXXMemberCallExpr(ASTContext &C, EmptyShell Empty) 123 : CallExpr(C, CXXMemberCallExprClass, Empty) { } 124 125 /// getImplicitObjectArgument - Retrieves the implicit object 126 /// argument for the member call. For example, in "x.f(5)", this 127 /// operation would return "x". 128 Expr *getImplicitObjectArgument() const; 129 130 /// Retrieves the declaration of the called method. 131 CXXMethodDecl *getMethodDecl() const; 132 133 /// getRecordDecl - Retrieves the CXXRecordDecl for the underlying type of 134 /// the implicit object argument. Note that this is may not be the same 135 /// declaration as that of the class context of the CXXMethodDecl which this 136 /// function is calling. 137 /// FIXME: Returns 0 for member pointer call exprs. 138 CXXRecordDecl *getRecordDecl() const; 139 140 static bool classof(const Stmt *T) { 141 return T->getStmtClass() == CXXMemberCallExprClass; 142 } 143}; 144 145/// CUDAKernelCallExpr - Represents a call to a CUDA kernel function. 146class CUDAKernelCallExpr : public CallExpr { 147private: 148 enum { CONFIG, END_PREARG }; 149 150public: 151 CUDAKernelCallExpr(ASTContext &C, Expr *fn, CallExpr *Config, 152 ArrayRef<Expr*> args, QualType t, ExprValueKind VK, 153 SourceLocation RP) 154 : CallExpr(C, CUDAKernelCallExprClass, fn, END_PREARG, args, t, VK, RP) { 155 setConfig(Config); 156 } 157 158 CUDAKernelCallExpr(ASTContext &C, EmptyShell Empty) 159 : CallExpr(C, CUDAKernelCallExprClass, END_PREARG, Empty) { } 160 161 const CallExpr *getConfig() const { 162 return cast_or_null<CallExpr>(getPreArg(CONFIG)); 163 } 164 CallExpr *getConfig() { return cast_or_null<CallExpr>(getPreArg(CONFIG)); } 165 void setConfig(CallExpr *E) { setPreArg(CONFIG, E); } 166 167 static bool classof(const Stmt *T) { 168 return T->getStmtClass() == CUDAKernelCallExprClass; 169 } 170}; 171 172/// CXXNamedCastExpr - Abstract class common to all of the C++ "named" 173/// casts, @c static_cast, @c dynamic_cast, @c reinterpret_cast, or @c 174/// const_cast. 175/// 176/// This abstract class is inherited by all of the classes 177/// representing "named" casts, e.g., CXXStaticCastExpr, 178/// CXXDynamicCastExpr, CXXReinterpretCastExpr, and CXXConstCastExpr. 179class CXXNamedCastExpr : public ExplicitCastExpr { 180private: 181 SourceLocation Loc; // the location of the casting op 182 SourceLocation RParenLoc; // the location of the right parenthesis 183 SourceRange AngleBrackets; // range for '<' '>' 184 185protected: 186 CXXNamedCastExpr(StmtClass SC, QualType ty, ExprValueKind VK, 187 CastKind kind, Expr *op, unsigned PathSize, 188 TypeSourceInfo *writtenTy, SourceLocation l, 189 SourceLocation RParenLoc, 190 SourceRange AngleBrackets) 191 : ExplicitCastExpr(SC, ty, VK, kind, op, PathSize, writtenTy), Loc(l), 192 RParenLoc(RParenLoc), AngleBrackets(AngleBrackets) {} 193 194 explicit CXXNamedCastExpr(StmtClass SC, EmptyShell Shell, unsigned PathSize) 195 : ExplicitCastExpr(SC, Shell, PathSize) { } 196 197 friend class ASTStmtReader; 198 199public: 200 const char *getCastName() const; 201 202 /// \brief Retrieve the location of the cast operator keyword, e.g., 203 /// "static_cast". 204 SourceLocation getOperatorLoc() const { return Loc; } 205 206 /// \brief Retrieve the location of the closing parenthesis. 207 SourceLocation getRParenLoc() const { return RParenLoc; } 208 209 SourceLocation getLocStart() const LLVM_READONLY { return Loc; } 210 SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; } 211 SourceRange getAngleBrackets() const LLVM_READONLY { return AngleBrackets; } 212 213 static bool classof(const Stmt *T) { 214 switch (T->getStmtClass()) { 215 case CXXStaticCastExprClass: 216 case CXXDynamicCastExprClass: 217 case CXXReinterpretCastExprClass: 218 case CXXConstCastExprClass: 219 return true; 220 default: 221 return false; 222 } 223 } 224}; 225 226/// CXXStaticCastExpr - A C++ @c static_cast expression 227/// (C++ [expr.static.cast]). 228/// 229/// This expression node represents a C++ static cast, e.g., 230/// @c static_cast<int>(1.0). 231class CXXStaticCastExpr : public CXXNamedCastExpr { 232 CXXStaticCastExpr(QualType ty, ExprValueKind vk, CastKind kind, Expr *op, 233 unsigned pathSize, TypeSourceInfo *writtenTy, 234 SourceLocation l, SourceLocation RParenLoc, 235 SourceRange AngleBrackets) 236 : CXXNamedCastExpr(CXXStaticCastExprClass, ty, vk, kind, op, pathSize, 237 writtenTy, l, RParenLoc, AngleBrackets) {} 238 239 explicit CXXStaticCastExpr(EmptyShell Empty, unsigned PathSize) 240 : CXXNamedCastExpr(CXXStaticCastExprClass, Empty, PathSize) { } 241 242public: 243 static CXXStaticCastExpr *Create(ASTContext &Context, QualType T, 244 ExprValueKind VK, CastKind K, Expr *Op, 245 const CXXCastPath *Path, 246 TypeSourceInfo *Written, SourceLocation L, 247 SourceLocation RParenLoc, 248 SourceRange AngleBrackets); 249 static CXXStaticCastExpr *CreateEmpty(ASTContext &Context, 250 unsigned PathSize); 251 252 static bool classof(const Stmt *T) { 253 return T->getStmtClass() == CXXStaticCastExprClass; 254 } 255}; 256 257/// CXXDynamicCastExpr - A C++ @c dynamic_cast expression 258/// (C++ [expr.dynamic.cast]), which may perform a run-time check to 259/// determine how to perform the type cast. 260/// 261/// This expression node represents a dynamic cast, e.g., 262/// @c dynamic_cast<Derived*>(BasePtr). 263class CXXDynamicCastExpr : public CXXNamedCastExpr { 264 CXXDynamicCastExpr(QualType ty, ExprValueKind VK, CastKind kind, 265 Expr *op, unsigned pathSize, TypeSourceInfo *writtenTy, 266 SourceLocation l, SourceLocation RParenLoc, 267 SourceRange AngleBrackets) 268 : CXXNamedCastExpr(CXXDynamicCastExprClass, ty, VK, kind, op, pathSize, 269 writtenTy, l, RParenLoc, AngleBrackets) {} 270 271 explicit CXXDynamicCastExpr(EmptyShell Empty, unsigned pathSize) 272 : CXXNamedCastExpr(CXXDynamicCastExprClass, Empty, pathSize) { } 273 274public: 275 static CXXDynamicCastExpr *Create(ASTContext &Context, QualType T, 276 ExprValueKind VK, CastKind Kind, Expr *Op, 277 const CXXCastPath *Path, 278 TypeSourceInfo *Written, SourceLocation L, 279 SourceLocation RParenLoc, 280 SourceRange AngleBrackets); 281 282 static CXXDynamicCastExpr *CreateEmpty(ASTContext &Context, 283 unsigned pathSize); 284 285 bool isAlwaysNull() const; 286 287 static bool classof(const Stmt *T) { 288 return T->getStmtClass() == CXXDynamicCastExprClass; 289 } 290}; 291 292/// CXXReinterpretCastExpr - A C++ @c reinterpret_cast expression (C++ 293/// [expr.reinterpret.cast]), which provides a differently-typed view 294/// of a value but performs no actual work at run time. 295/// 296/// This expression node represents a reinterpret cast, e.g., 297/// @c reinterpret_cast<int>(VoidPtr). 298class CXXReinterpretCastExpr : public CXXNamedCastExpr { 299 CXXReinterpretCastExpr(QualType ty, ExprValueKind vk, CastKind kind, 300 Expr *op, unsigned pathSize, 301 TypeSourceInfo *writtenTy, SourceLocation l, 302 SourceLocation RParenLoc, 303 SourceRange AngleBrackets) 304 : CXXNamedCastExpr(CXXReinterpretCastExprClass, ty, vk, kind, op, 305 pathSize, writtenTy, l, RParenLoc, AngleBrackets) {} 306 307 CXXReinterpretCastExpr(EmptyShell Empty, unsigned pathSize) 308 : CXXNamedCastExpr(CXXReinterpretCastExprClass, Empty, pathSize) { } 309 310public: 311 static CXXReinterpretCastExpr *Create(ASTContext &Context, QualType T, 312 ExprValueKind VK, CastKind Kind, 313 Expr *Op, const CXXCastPath *Path, 314 TypeSourceInfo *WrittenTy, SourceLocation L, 315 SourceLocation RParenLoc, 316 SourceRange AngleBrackets); 317 static CXXReinterpretCastExpr *CreateEmpty(ASTContext &Context, 318 unsigned pathSize); 319 320 static bool classof(const Stmt *T) { 321 return T->getStmtClass() == CXXReinterpretCastExprClass; 322 } 323}; 324 325/// CXXConstCastExpr - A C++ @c const_cast expression (C++ [expr.const.cast]), 326/// which can remove type qualifiers but does not change the underlying value. 327/// 328/// This expression node represents a const cast, e.g., 329/// @c const_cast<char*>(PtrToConstChar). 330class CXXConstCastExpr : public CXXNamedCastExpr { 331 CXXConstCastExpr(QualType ty, ExprValueKind VK, Expr *op, 332 TypeSourceInfo *writtenTy, SourceLocation l, 333 SourceLocation RParenLoc, SourceRange AngleBrackets) 334 : CXXNamedCastExpr(CXXConstCastExprClass, ty, VK, CK_NoOp, op, 335 0, writtenTy, l, RParenLoc, AngleBrackets) {} 336 337 explicit CXXConstCastExpr(EmptyShell Empty) 338 : CXXNamedCastExpr(CXXConstCastExprClass, Empty, 0) { } 339 340public: 341 static CXXConstCastExpr *Create(ASTContext &Context, QualType T, 342 ExprValueKind VK, Expr *Op, 343 TypeSourceInfo *WrittenTy, SourceLocation L, 344 SourceLocation RParenLoc, 345 SourceRange AngleBrackets); 346 static CXXConstCastExpr *CreateEmpty(ASTContext &Context); 347 348 static bool classof(const Stmt *T) { 349 return T->getStmtClass() == CXXConstCastExprClass; 350 } 351}; 352 353/// UserDefinedLiteral - A call to a literal operator (C++11 [over.literal]) 354/// written as a user-defined literal (C++11 [lit.ext]). 355/// 356/// Represents a user-defined literal, e.g. "foo"_bar or 1.23_xyz. While this 357/// is semantically equivalent to a normal call, this AST node provides better 358/// information about the syntactic representation of the literal. 359/// 360/// Since literal operators are never found by ADL and can only be declared at 361/// namespace scope, a user-defined literal is never dependent. 362class UserDefinedLiteral : public CallExpr { 363 /// \brief The location of a ud-suffix within the literal. 364 SourceLocation UDSuffixLoc; 365 366public: 367 UserDefinedLiteral(ASTContext &C, Expr *Fn, ArrayRef<Expr*> Args, 368 QualType T, ExprValueKind VK, SourceLocation LitEndLoc, 369 SourceLocation SuffixLoc) 370 : CallExpr(C, UserDefinedLiteralClass, Fn, 0, Args, T, VK, LitEndLoc), 371 UDSuffixLoc(SuffixLoc) {} 372 explicit UserDefinedLiteral(ASTContext &C, EmptyShell Empty) 373 : CallExpr(C, UserDefinedLiteralClass, Empty) {} 374 375 /// The kind of literal operator which is invoked. 376 enum LiteralOperatorKind { 377 LOK_Raw, ///< Raw form: operator "" X (const char *) 378 LOK_Template, ///< Raw form: operator "" X<cs...> () 379 LOK_Integer, ///< operator "" X (unsigned long long) 380 LOK_Floating, ///< operator "" X (long double) 381 LOK_String, ///< operator "" X (const CharT *, size_t) 382 LOK_Character ///< operator "" X (CharT) 383 }; 384 385 /// getLiteralOperatorKind - Returns the kind of literal operator invocation 386 /// which this expression represents. 387 LiteralOperatorKind getLiteralOperatorKind() const; 388 389 /// getCookedLiteral - If this is not a raw user-defined literal, get the 390 /// underlying cooked literal (representing the literal with the suffix 391 /// removed). 392 Expr *getCookedLiteral(); 393 const Expr *getCookedLiteral() const { 394 return const_cast<UserDefinedLiteral*>(this)->getCookedLiteral(); 395 } 396 397 SourceLocation getLocStart() const { 398 if (getLiteralOperatorKind() == LOK_Template) 399 return getRParenLoc(); 400 return getArg(0)->getLocStart(); 401 } 402 SourceLocation getLocEnd() const { return getRParenLoc(); } 403 404 405 /// getUDSuffixLoc - Returns the location of a ud-suffix in the expression. 406 /// For a string literal, there may be multiple identical suffixes. This 407 /// returns the first. 408 SourceLocation getUDSuffixLoc() const { return UDSuffixLoc; } 409 410 /// getUDSuffix - Returns the ud-suffix specified for this literal. 411 const IdentifierInfo *getUDSuffix() const; 412 413 static bool classof(const Stmt *S) { 414 return S->getStmtClass() == UserDefinedLiteralClass; 415 } 416 417 friend class ASTStmtReader; 418 friend class ASTStmtWriter; 419}; 420 421/// CXXBoolLiteralExpr - [C++ 2.13.5] C++ Boolean Literal. 422/// 423class CXXBoolLiteralExpr : public Expr { 424 bool Value; 425 SourceLocation Loc; 426public: 427 CXXBoolLiteralExpr(bool val, QualType Ty, SourceLocation l) : 428 Expr(CXXBoolLiteralExprClass, Ty, VK_RValue, OK_Ordinary, false, false, 429 false, false), 430 Value(val), Loc(l) {} 431 432 explicit CXXBoolLiteralExpr(EmptyShell Empty) 433 : Expr(CXXBoolLiteralExprClass, Empty) { } 434 435 bool getValue() const { return Value; } 436 void setValue(bool V) { Value = V; } 437 438 SourceLocation getLocStart() const LLVM_READONLY { return Loc; } 439 SourceLocation getLocEnd() const LLVM_READONLY { return Loc; } 440 441 SourceLocation getLocation() const { return Loc; } 442 void setLocation(SourceLocation L) { Loc = L; } 443 444 static bool classof(const Stmt *T) { 445 return T->getStmtClass() == CXXBoolLiteralExprClass; 446 } 447 448 // Iterators 449 child_range children() { return child_range(); } 450}; 451 452/// CXXNullPtrLiteralExpr - [C++0x 2.14.7] C++ Pointer Literal 453class CXXNullPtrLiteralExpr : public Expr { 454 SourceLocation Loc; 455public: 456 CXXNullPtrLiteralExpr(QualType Ty, SourceLocation l) : 457 Expr(CXXNullPtrLiteralExprClass, Ty, VK_RValue, OK_Ordinary, false, false, 458 false, false), 459 Loc(l) {} 460 461 explicit CXXNullPtrLiteralExpr(EmptyShell Empty) 462 : Expr(CXXNullPtrLiteralExprClass, Empty) { } 463 464 SourceLocation getLocStart() const LLVM_READONLY { return Loc; } 465 SourceLocation getLocEnd() const LLVM_READONLY { return Loc; } 466 467 SourceLocation getLocation() const { return Loc; } 468 void setLocation(SourceLocation L) { Loc = L; } 469 470 static bool classof(const Stmt *T) { 471 return T->getStmtClass() == CXXNullPtrLiteralExprClass; 472 } 473 474 child_range children() { return child_range(); } 475}; 476 477/// \brief Implicit construction of a std::initializer_list<T> object from an 478/// array temporary within list-initialization (C++11 [dcl.init.list]p5). 479class CXXStdInitializerListExpr : public Expr { 480 Stmt *SubExpr; 481 482 CXXStdInitializerListExpr(EmptyShell Empty) 483 : Expr(CXXStdInitializerListExprClass, Empty), SubExpr(0) {} 484 485public: 486 CXXStdInitializerListExpr(QualType Ty, Expr *SubExpr) 487 : Expr(CXXStdInitializerListExprClass, Ty, VK_RValue, OK_Ordinary, 488 Ty->isDependentType(), SubExpr->isValueDependent(), 489 SubExpr->isInstantiationDependent(), 490 SubExpr->containsUnexpandedParameterPack()), 491 SubExpr(SubExpr) {} 492 493 Expr *getSubExpr() { return static_cast<Expr*>(SubExpr); } 494 const Expr *getSubExpr() const { return static_cast<const Expr*>(SubExpr); } 495 496 SourceLocation getLocStart() const LLVM_READONLY { 497 return SubExpr->getLocStart(); 498 } 499 SourceLocation getLocEnd() const LLVM_READONLY { 500 return SubExpr->getLocEnd(); 501 } 502 SourceRange getSourceRange() const LLVM_READONLY { 503 return SubExpr->getSourceRange(); 504 } 505 506 static bool classof(const Stmt *S) { 507 return S->getStmtClass() == CXXStdInitializerListExprClass; 508 } 509 510 child_range children() { return child_range(&SubExpr, &SubExpr + 1); } 511 512 friend class ASTReader; 513 friend class ASTStmtReader; 514}; 515 516/// CXXTypeidExpr - A C++ @c typeid expression (C++ [expr.typeid]), which gets 517/// the type_info that corresponds to the supplied type, or the (possibly 518/// dynamic) type of the supplied expression. 519/// 520/// This represents code like @c typeid(int) or @c typeid(*objPtr) 521class CXXTypeidExpr : public Expr { 522private: 523 llvm::PointerUnion<Stmt *, TypeSourceInfo *> Operand; 524 SourceRange Range; 525 526public: 527 CXXTypeidExpr(QualType Ty, TypeSourceInfo *Operand, SourceRange R) 528 : Expr(CXXTypeidExprClass, Ty, VK_LValue, OK_Ordinary, 529 // typeid is never type-dependent (C++ [temp.dep.expr]p4) 530 false, 531 // typeid is value-dependent if the type or expression are dependent 532 Operand->getType()->isDependentType(), 533 Operand->getType()->isInstantiationDependentType(), 534 Operand->getType()->containsUnexpandedParameterPack()), 535 Operand(Operand), Range(R) { } 536 537 CXXTypeidExpr(QualType Ty, Expr *Operand, SourceRange R) 538 : Expr(CXXTypeidExprClass, Ty, VK_LValue, OK_Ordinary, 539 // typeid is never type-dependent (C++ [temp.dep.expr]p4) 540 false, 541 // typeid is value-dependent if the type or expression are dependent 542 Operand->isTypeDependent() || Operand->isValueDependent(), 543 Operand->isInstantiationDependent(), 544 Operand->containsUnexpandedParameterPack()), 545 Operand(Operand), Range(R) { } 546 547 CXXTypeidExpr(EmptyShell Empty, bool isExpr) 548 : Expr(CXXTypeidExprClass, Empty) { 549 if (isExpr) 550 Operand = (Expr*)0; 551 else 552 Operand = (TypeSourceInfo*)0; 553 } 554 555 /// Determine whether this typeid has a type operand which is potentially 556 /// evaluated, per C++11 [expr.typeid]p3. 557 bool isPotentiallyEvaluated() const; 558 559 bool isTypeOperand() const { return Operand.is<TypeSourceInfo *>(); } 560 561 /// \brief Retrieves the type operand of this typeid() expression after 562 /// various required adjustments (removing reference types, cv-qualifiers). 563 QualType getTypeOperand() const; 564 565 /// \brief Retrieve source information for the type operand. 566 TypeSourceInfo *getTypeOperandSourceInfo() const { 567 assert(isTypeOperand() && "Cannot call getTypeOperand for typeid(expr)"); 568 return Operand.get<TypeSourceInfo *>(); 569 } 570 571 void setTypeOperandSourceInfo(TypeSourceInfo *TSI) { 572 assert(isTypeOperand() && "Cannot call getTypeOperand for typeid(expr)"); 573 Operand = TSI; 574 } 575 576 Expr *getExprOperand() const { 577 assert(!isTypeOperand() && "Cannot call getExprOperand for typeid(type)"); 578 return static_cast<Expr*>(Operand.get<Stmt *>()); 579 } 580 581 void setExprOperand(Expr *E) { 582 assert(!isTypeOperand() && "Cannot call getExprOperand for typeid(type)"); 583 Operand = E; 584 } 585 586 SourceLocation getLocStart() const LLVM_READONLY { return Range.getBegin(); } 587 SourceLocation getLocEnd() const LLVM_READONLY { return Range.getEnd(); } 588 SourceRange getSourceRange() const LLVM_READONLY { return Range; } 589 void setSourceRange(SourceRange R) { Range = R; } 590 591 static bool classof(const Stmt *T) { 592 return T->getStmtClass() == CXXTypeidExprClass; 593 } 594 595 // Iterators 596 child_range children() { 597 if (isTypeOperand()) return child_range(); 598 Stmt **begin = reinterpret_cast<Stmt**>(&Operand); 599 return child_range(begin, begin + 1); 600 } 601}; 602 603/// A member reference to an MSPropertyDecl. This expression always 604/// has pseudo-object type, and therefore it is typically not 605/// encountered in a fully-typechecked expression except within the 606/// syntactic form of a PseudoObjectExpr. 607class MSPropertyRefExpr : public Expr { 608 Expr *BaseExpr; 609 MSPropertyDecl *TheDecl; 610 SourceLocation MemberLoc; 611 bool IsArrow; 612 NestedNameSpecifierLoc QualifierLoc; 613 614public: 615 MSPropertyRefExpr(Expr *baseExpr, MSPropertyDecl *decl, bool isArrow, 616 QualType ty, ExprValueKind VK, 617 NestedNameSpecifierLoc qualifierLoc, 618 SourceLocation nameLoc) 619 : Expr(MSPropertyRefExprClass, ty, VK, OK_Ordinary, 620 /*type-dependent*/ false, baseExpr->isValueDependent(), 621 baseExpr->isInstantiationDependent(), 622 baseExpr->containsUnexpandedParameterPack()), 623 BaseExpr(baseExpr), TheDecl(decl), 624 MemberLoc(nameLoc), IsArrow(isArrow), 625 QualifierLoc(qualifierLoc) {} 626 627 MSPropertyRefExpr(EmptyShell Empty) : Expr(MSPropertyRefExprClass, Empty) {} 628 629 SourceRange getSourceRange() const LLVM_READONLY { 630 return SourceRange(getLocStart(), getLocEnd()); 631 } 632 bool isImplicitAccess() const { 633 return getBaseExpr() && getBaseExpr()->isImplicitCXXThis(); 634 } 635 SourceLocation getLocStart() const { 636 if (!isImplicitAccess()) 637 return BaseExpr->getLocStart(); 638 else if (QualifierLoc) 639 return QualifierLoc.getBeginLoc(); 640 else 641 return MemberLoc; 642 } 643 SourceLocation getLocEnd() const { return getMemberLoc(); } 644 645 child_range children() { 646 return child_range((Stmt**)&BaseExpr, (Stmt**)&BaseExpr + 1); 647 } 648 static bool classof(const Stmt *T) { 649 return T->getStmtClass() == MSPropertyRefExprClass; 650 } 651 652 Expr *getBaseExpr() const { return BaseExpr; } 653 MSPropertyDecl *getPropertyDecl() const { return TheDecl; } 654 bool isArrow() const { return IsArrow; } 655 SourceLocation getMemberLoc() const { return MemberLoc; } 656 NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } 657 658 friend class ASTStmtReader; 659}; 660 661/// CXXUuidofExpr - A microsoft C++ @c __uuidof expression, which gets 662/// the _GUID that corresponds to the supplied type or expression. 663/// 664/// This represents code like @c __uuidof(COMTYPE) or @c __uuidof(*comPtr) 665class CXXUuidofExpr : public Expr { 666private: 667 llvm::PointerUnion<Stmt *, TypeSourceInfo *> Operand; 668 SourceRange Range; 669 670public: 671 CXXUuidofExpr(QualType Ty, TypeSourceInfo *Operand, SourceRange R) 672 : Expr(CXXUuidofExprClass, Ty, VK_LValue, OK_Ordinary, 673 false, Operand->getType()->isDependentType(), 674 Operand->getType()->isInstantiationDependentType(), 675 Operand->getType()->containsUnexpandedParameterPack()), 676 Operand(Operand), Range(R) { } 677 678 CXXUuidofExpr(QualType Ty, Expr *Operand, SourceRange R) 679 : Expr(CXXUuidofExprClass, Ty, VK_LValue, OK_Ordinary, 680 false, Operand->isTypeDependent(), 681 Operand->isInstantiationDependent(), 682 Operand->containsUnexpandedParameterPack()), 683 Operand(Operand), Range(R) { } 684 685 CXXUuidofExpr(EmptyShell Empty, bool isExpr) 686 : Expr(CXXUuidofExprClass, Empty) { 687 if (isExpr) 688 Operand = (Expr*)0; 689 else 690 Operand = (TypeSourceInfo*)0; 691 } 692 693 bool isTypeOperand() const { return Operand.is<TypeSourceInfo *>(); } 694 695 /// \brief Retrieves the type operand of this __uuidof() expression after 696 /// various required adjustments (removing reference types, cv-qualifiers). 697 QualType getTypeOperand() const; 698 699 /// \brief Retrieve source information for the type operand. 700 TypeSourceInfo *getTypeOperandSourceInfo() const { 701 assert(isTypeOperand() && "Cannot call getTypeOperand for __uuidof(expr)"); 702 return Operand.get<TypeSourceInfo *>(); 703 } 704 705 void setTypeOperandSourceInfo(TypeSourceInfo *TSI) { 706 assert(isTypeOperand() && "Cannot call getTypeOperand for __uuidof(expr)"); 707 Operand = TSI; 708 } 709 710 Expr *getExprOperand() const { 711 assert(!isTypeOperand() && "Cannot call getExprOperand for __uuidof(type)"); 712 return static_cast<Expr*>(Operand.get<Stmt *>()); 713 } 714 715 void setExprOperand(Expr *E) { 716 assert(!isTypeOperand() && "Cannot call getExprOperand for __uuidof(type)"); 717 Operand = E; 718 } 719 720 SourceLocation getLocStart() const LLVM_READONLY { return Range.getBegin(); } 721 SourceLocation getLocEnd() const LLVM_READONLY { return Range.getEnd(); } 722 SourceRange getSourceRange() const LLVM_READONLY { return Range; } 723 void setSourceRange(SourceRange R) { Range = R; } 724 725 static bool classof(const Stmt *T) { 726 return T->getStmtClass() == CXXUuidofExprClass; 727 } 728 729 /// Grabs __declspec(uuid()) off a type, or returns 0 if there is none. 730 static UuidAttr *GetUuidAttrOfType(QualType QT); 731 732 // Iterators 733 child_range children() { 734 if (isTypeOperand()) return child_range(); 735 Stmt **begin = reinterpret_cast<Stmt**>(&Operand); 736 return child_range(begin, begin + 1); 737 } 738}; 739 740/// CXXThisExpr - Represents the "this" expression in C++, which is a 741/// pointer to the object on which the current member function is 742/// executing (C++ [expr.prim]p3). Example: 743/// 744/// @code 745/// class Foo { 746/// public: 747/// void bar(); 748/// void test() { this->bar(); } 749/// }; 750/// @endcode 751class CXXThisExpr : public Expr { 752 SourceLocation Loc; 753 bool Implicit : 1; 754 755public: 756 CXXThisExpr(SourceLocation L, QualType Type, bool isImplicit) 757 : Expr(CXXThisExprClass, Type, VK_RValue, OK_Ordinary, 758 // 'this' is type-dependent if the class type of the enclosing 759 // member function is dependent (C++ [temp.dep.expr]p2) 760 Type->isDependentType(), Type->isDependentType(), 761 Type->isInstantiationDependentType(), 762 /*ContainsUnexpandedParameterPack=*/false), 763 Loc(L), Implicit(isImplicit) { } 764 765 CXXThisExpr(EmptyShell Empty) : Expr(CXXThisExprClass, Empty) {} 766 767 SourceLocation getLocation() const { return Loc; } 768 void setLocation(SourceLocation L) { Loc = L; } 769 770 SourceLocation getLocStart() const LLVM_READONLY { return Loc; } 771 SourceLocation getLocEnd() const LLVM_READONLY { return Loc; } 772 773 bool isImplicit() const { return Implicit; } 774 void setImplicit(bool I) { Implicit = I; } 775 776 static bool classof(const Stmt *T) { 777 return T->getStmtClass() == CXXThisExprClass; 778 } 779 780 // Iterators 781 child_range children() { return child_range(); } 782}; 783 784/// CXXThrowExpr - [C++ 15] C++ Throw Expression. This handles 785/// 'throw' and 'throw' assignment-expression. When 786/// assignment-expression isn't present, Op will be null. 787/// 788class CXXThrowExpr : public Expr { 789 Stmt *Op; 790 SourceLocation ThrowLoc; 791 /// \brief Whether the thrown variable (if any) is in scope. 792 unsigned IsThrownVariableInScope : 1; 793 794 friend class ASTStmtReader; 795 796public: 797 // Ty is the void type which is used as the result type of the 798 // exepression. The l is the location of the throw keyword. expr 799 // can by null, if the optional expression to throw isn't present. 800 CXXThrowExpr(Expr *expr, QualType Ty, SourceLocation l, 801 bool IsThrownVariableInScope) : 802 Expr(CXXThrowExprClass, Ty, VK_RValue, OK_Ordinary, false, false, 803 expr && expr->isInstantiationDependent(), 804 expr && expr->containsUnexpandedParameterPack()), 805 Op(expr), ThrowLoc(l), IsThrownVariableInScope(IsThrownVariableInScope) {} 806 CXXThrowExpr(EmptyShell Empty) : Expr(CXXThrowExprClass, Empty) {} 807 808 const Expr *getSubExpr() const { return cast_or_null<Expr>(Op); } 809 Expr *getSubExpr() { return cast_or_null<Expr>(Op); } 810 811 SourceLocation getThrowLoc() const { return ThrowLoc; } 812 813 /// \brief Determines whether the variable thrown by this expression (if any!) 814 /// is within the innermost try block. 815 /// 816 /// This information is required to determine whether the NRVO can apply to 817 /// this variable. 818 bool isThrownVariableInScope() const { return IsThrownVariableInScope; } 819 820 SourceLocation getLocStart() const LLVM_READONLY { return ThrowLoc; } 821 SourceLocation getLocEnd() const LLVM_READONLY { 822 if (getSubExpr() == 0) 823 return ThrowLoc; 824 return getSubExpr()->getLocEnd(); 825 } 826 827 static bool classof(const Stmt *T) { 828 return T->getStmtClass() == CXXThrowExprClass; 829 } 830 831 // Iterators 832 child_range children() { 833 return child_range(&Op, Op ? &Op+1 : &Op); 834 } 835}; 836 837/// CXXDefaultArgExpr - C++ [dcl.fct.default]. This wraps up a 838/// function call argument that was created from the corresponding 839/// parameter's default argument, when the call did not explicitly 840/// supply arguments for all of the parameters. 841class CXXDefaultArgExpr : public Expr { 842 /// \brief The parameter whose default is being used. 843 /// 844 /// When the bit is set, the subexpression is stored after the 845 /// CXXDefaultArgExpr itself. When the bit is clear, the parameter's 846 /// actual default expression is the subexpression. 847 llvm::PointerIntPair<ParmVarDecl *, 1, bool> Param; 848 849 /// \brief The location where the default argument expression was used. 850 SourceLocation Loc; 851 852 CXXDefaultArgExpr(StmtClass SC, SourceLocation Loc, ParmVarDecl *param) 853 : Expr(SC, 854 param->hasUnparsedDefaultArg() 855 ? param->getType().getNonReferenceType() 856 : param->getDefaultArg()->getType(), 857 param->getDefaultArg()->getValueKind(), 858 param->getDefaultArg()->getObjectKind(), false, false, false, false), 859 Param(param, false), Loc(Loc) { } 860 861 CXXDefaultArgExpr(StmtClass SC, SourceLocation Loc, ParmVarDecl *param, 862 Expr *SubExpr) 863 : Expr(SC, SubExpr->getType(), 864 SubExpr->getValueKind(), SubExpr->getObjectKind(), 865 false, false, false, false), 866 Param(param, true), Loc(Loc) { 867 *reinterpret_cast<Expr **>(this + 1) = SubExpr; 868 } 869 870public: 871 CXXDefaultArgExpr(EmptyShell Empty) : Expr(CXXDefaultArgExprClass, Empty) {} 872 873 874 // Param is the parameter whose default argument is used by this 875 // expression. 876 static CXXDefaultArgExpr *Create(ASTContext &C, SourceLocation Loc, 877 ParmVarDecl *Param) { 878 return new (C) CXXDefaultArgExpr(CXXDefaultArgExprClass, Loc, Param); 879 } 880 881 // Param is the parameter whose default argument is used by this 882 // expression, and SubExpr is the expression that will actually be used. 883 static CXXDefaultArgExpr *Create(ASTContext &C, 884 SourceLocation Loc, 885 ParmVarDecl *Param, 886 Expr *SubExpr); 887 888 // Retrieve the parameter that the argument was created from. 889 const ParmVarDecl *getParam() const { return Param.getPointer(); } 890 ParmVarDecl *getParam() { return Param.getPointer(); } 891 892 // Retrieve the actual argument to the function call. 893 const Expr *getExpr() const { 894 if (Param.getInt()) 895 return *reinterpret_cast<Expr const * const*> (this + 1); 896 return getParam()->getDefaultArg(); 897 } 898 Expr *getExpr() { 899 if (Param.getInt()) 900 return *reinterpret_cast<Expr **> (this + 1); 901 return getParam()->getDefaultArg(); 902 } 903 904 /// \brief Retrieve the location where this default argument was actually 905 /// used. 906 SourceLocation getUsedLocation() const { return Loc; } 907 908 // Default argument expressions have no representation in the 909 // source, so they have an empty source range. 910 SourceLocation getLocStart() const LLVM_READONLY { return SourceLocation(); } 911 SourceLocation getLocEnd() const LLVM_READONLY { return SourceLocation(); } 912 913 SourceLocation getExprLoc() const LLVM_READONLY { return Loc; } 914 915 static bool classof(const Stmt *T) { 916 return T->getStmtClass() == CXXDefaultArgExprClass; 917 } 918 919 // Iterators 920 child_range children() { return child_range(); } 921 922 friend class ASTStmtReader; 923 friend class ASTStmtWriter; 924}; 925 926/// \brief This wraps a use of a C++ default initializer (technically, 927/// a brace-or-equal-initializer for a non-static data member) when it 928/// is implicitly used in a mem-initializer-list in a constructor 929/// (C++11 [class.base.init]p8) or in aggregate initialization 930/// (C++1y [dcl.init.aggr]p7). 931class CXXDefaultInitExpr : public Expr { 932 /// \brief The field whose default is being used. 933 FieldDecl *Field; 934 935 /// \brief The location where the default initializer expression was used. 936 SourceLocation Loc; 937 938 CXXDefaultInitExpr(ASTContext &C, SourceLocation Loc, FieldDecl *Field, 939 QualType T); 940 941 CXXDefaultInitExpr(EmptyShell Empty) : Expr(CXXDefaultInitExprClass, Empty) {} 942 943public: 944 // Field is the non-static data member whose default initializer is used 945 // by this expression. 946 static CXXDefaultInitExpr *Create(ASTContext &C, SourceLocation Loc, 947 FieldDecl *Field) { 948 return new (C) CXXDefaultInitExpr(C, Loc, Field, Field->getType()); 949 } 950 951 // Get the field whose initializer will be used. 952 FieldDecl *getField() { return Field; } 953 const FieldDecl *getField() const { return Field; } 954 955 // Get the initialization expression that will be used. 956 const Expr *getExpr() const { return Field->getInClassInitializer(); } 957 Expr *getExpr() { return Field->getInClassInitializer(); } 958 959 SourceLocation getLocStart() const LLVM_READONLY { return Loc; } 960 SourceLocation getLocEnd() const LLVM_READONLY { return Loc; } 961 962 static bool classof(const Stmt *T) { 963 return T->getStmtClass() == CXXDefaultInitExprClass; 964 } 965 966 // Iterators 967 child_range children() { return child_range(); } 968 969 friend class ASTReader; 970 friend class ASTStmtReader; 971}; 972 973/// CXXTemporary - Represents a C++ temporary. 974class CXXTemporary { 975 /// Destructor - The destructor that needs to be called. 976 const CXXDestructorDecl *Destructor; 977 978 CXXTemporary(const CXXDestructorDecl *destructor) 979 : Destructor(destructor) { } 980 981public: 982 static CXXTemporary *Create(ASTContext &C, 983 const CXXDestructorDecl *Destructor); 984 985 const CXXDestructorDecl *getDestructor() const { return Destructor; } 986 void setDestructor(const CXXDestructorDecl *Dtor) { 987 Destructor = Dtor; 988 } 989}; 990 991/// \brief Represents binding an expression to a temporary. 992/// 993/// This ensures the destructor is called for the temporary. It should only be 994/// needed for non-POD, non-trivially destructable class types. For example: 995/// 996/// \code 997/// struct S { 998/// S() { } // User defined constructor makes S non-POD. 999/// ~S() { } // User defined destructor makes it non-trivial. 1000/// }; 1001/// void test() { 1002/// const S &s_ref = S(); // Requires a CXXBindTemporaryExpr. 1003/// } 1004/// \endcode 1005class CXXBindTemporaryExpr : public Expr { 1006 CXXTemporary *Temp; 1007 1008 Stmt *SubExpr; 1009 1010 CXXBindTemporaryExpr(CXXTemporary *temp, Expr* SubExpr) 1011 : Expr(CXXBindTemporaryExprClass, SubExpr->getType(), 1012 VK_RValue, OK_Ordinary, SubExpr->isTypeDependent(), 1013 SubExpr->isValueDependent(), 1014 SubExpr->isInstantiationDependent(), 1015 SubExpr->containsUnexpandedParameterPack()), 1016 Temp(temp), SubExpr(SubExpr) { } 1017 1018public: 1019 CXXBindTemporaryExpr(EmptyShell Empty) 1020 : Expr(CXXBindTemporaryExprClass, Empty), Temp(0), SubExpr(0) {} 1021 1022 static CXXBindTemporaryExpr *Create(ASTContext &C, CXXTemporary *Temp, 1023 Expr* SubExpr); 1024 1025 CXXTemporary *getTemporary() { return Temp; } 1026 const CXXTemporary *getTemporary() const { return Temp; } 1027 void setTemporary(CXXTemporary *T) { Temp = T; } 1028 1029 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 1030 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 1031 void setSubExpr(Expr *E) { SubExpr = E; } 1032 1033 SourceLocation getLocStart() const LLVM_READONLY { 1034 return SubExpr->getLocStart(); 1035 } 1036 SourceLocation getLocEnd() const LLVM_READONLY { return SubExpr->getLocEnd();} 1037 1038 // Implement isa/cast/dyncast/etc. 1039 static bool classof(const Stmt *T) { 1040 return T->getStmtClass() == CXXBindTemporaryExprClass; 1041 } 1042 1043 // Iterators 1044 child_range children() { return child_range(&SubExpr, &SubExpr + 1); } 1045}; 1046 1047/// \brief Represents a call to a C++ constructor. 1048class CXXConstructExpr : public Expr { 1049public: 1050 enum ConstructionKind { 1051 CK_Complete, 1052 CK_NonVirtualBase, 1053 CK_VirtualBase, 1054 CK_Delegating 1055 }; 1056 1057private: 1058 CXXConstructorDecl *Constructor; 1059 1060 SourceLocation Loc; 1061 SourceRange ParenRange; 1062 unsigned NumArgs : 16; 1063 bool Elidable : 1; 1064 bool HadMultipleCandidates : 1; 1065 bool ListInitialization : 1; 1066 bool ZeroInitialization : 1; 1067 unsigned ConstructKind : 2; 1068 Stmt **Args; 1069 1070protected: 1071 CXXConstructExpr(ASTContext &C, StmtClass SC, QualType T, 1072 SourceLocation Loc, 1073 CXXConstructorDecl *d, bool elidable, 1074 ArrayRef<Expr *> Args, 1075 bool HadMultipleCandidates, 1076 bool ListInitialization, 1077 bool ZeroInitialization, 1078 ConstructionKind ConstructKind, 1079 SourceRange ParenRange); 1080 1081 /// \brief Construct an empty C++ construction expression. 1082 CXXConstructExpr(StmtClass SC, EmptyShell Empty) 1083 : Expr(SC, Empty), Constructor(0), NumArgs(0), Elidable(false), 1084 HadMultipleCandidates(false), ListInitialization(false), 1085 ZeroInitialization(false), ConstructKind(0), Args(0) 1086 { } 1087 1088public: 1089 /// \brief Construct an empty C++ construction expression. 1090 explicit CXXConstructExpr(EmptyShell Empty) 1091 : Expr(CXXConstructExprClass, Empty), Constructor(0), 1092 NumArgs(0), Elidable(false), HadMultipleCandidates(false), 1093 ListInitialization(false), ZeroInitialization(false), 1094 ConstructKind(0), Args(0) 1095 { } 1096 1097 static CXXConstructExpr *Create(ASTContext &C, QualType T, 1098 SourceLocation Loc, 1099 CXXConstructorDecl *D, bool Elidable, 1100 ArrayRef<Expr *> Args, 1101 bool HadMultipleCandidates, 1102 bool ListInitialization, 1103 bool ZeroInitialization, 1104 ConstructionKind ConstructKind, 1105 SourceRange ParenRange); 1106 1107 CXXConstructorDecl* getConstructor() const { return Constructor; } 1108 void setConstructor(CXXConstructorDecl *C) { Constructor = C; } 1109 1110 SourceLocation getLocation() const { return Loc; } 1111 void setLocation(SourceLocation Loc) { this->Loc = Loc; } 1112 1113 /// \brief Whether this construction is elidable. 1114 bool isElidable() const { return Elidable; } 1115 void setElidable(bool E) { Elidable = E; } 1116 1117 /// \brief Whether the referred constructor was resolved from 1118 /// an overloaded set having size greater than 1. 1119 bool hadMultipleCandidates() const { return HadMultipleCandidates; } 1120 void setHadMultipleCandidates(bool V) { HadMultipleCandidates = V; } 1121 1122 /// \brief Whether this constructor call was written as list-initialization. 1123 bool isListInitialization() const { return ListInitialization; } 1124 void setListInitialization(bool V) { ListInitialization = V; } 1125 1126 /// \brief Whether this construction first requires 1127 /// zero-initialization before the initializer is called. 1128 bool requiresZeroInitialization() const { return ZeroInitialization; } 1129 void setRequiresZeroInitialization(bool ZeroInit) { 1130 ZeroInitialization = ZeroInit; 1131 } 1132 1133 /// \brief Determines whether this constructor is actually constructing 1134 /// a base class (rather than a complete object). 1135 ConstructionKind getConstructionKind() const { 1136 return (ConstructionKind)ConstructKind; 1137 } 1138 void setConstructionKind(ConstructionKind CK) { 1139 ConstructKind = CK; 1140 } 1141 1142 typedef ExprIterator arg_iterator; 1143 typedef ConstExprIterator const_arg_iterator; 1144 1145 arg_iterator arg_begin() { return Args; } 1146 arg_iterator arg_end() { return Args + NumArgs; } 1147 const_arg_iterator arg_begin() const { return Args; } 1148 const_arg_iterator arg_end() const { return Args + NumArgs; } 1149 1150 Expr **getArgs() const { return reinterpret_cast<Expr **>(Args); } 1151 unsigned getNumArgs() const { return NumArgs; } 1152 1153 /// getArg - Return the specified argument. 1154 Expr *getArg(unsigned Arg) { 1155 assert(Arg < NumArgs && "Arg access out of range!"); 1156 return cast<Expr>(Args[Arg]); 1157 } 1158 const Expr *getArg(unsigned Arg) const { 1159 assert(Arg < NumArgs && "Arg access out of range!"); 1160 return cast<Expr>(Args[Arg]); 1161 } 1162 1163 /// setArg - Set the specified argument. 1164 void setArg(unsigned Arg, Expr *ArgExpr) { 1165 assert(Arg < NumArgs && "Arg access out of range!"); 1166 Args[Arg] = ArgExpr; 1167 } 1168 1169 SourceLocation getLocStart() const LLVM_READONLY; 1170 SourceLocation getLocEnd() const LLVM_READONLY; 1171 SourceRange getParenRange() const { return ParenRange; } 1172 void setParenRange(SourceRange Range) { ParenRange = Range; } 1173 1174 static bool classof(const Stmt *T) { 1175 return T->getStmtClass() == CXXConstructExprClass || 1176 T->getStmtClass() == CXXTemporaryObjectExprClass; 1177 } 1178 1179 // Iterators 1180 child_range children() { 1181 return child_range(&Args[0], &Args[0]+NumArgs); 1182 } 1183 1184 friend class ASTStmtReader; 1185}; 1186 1187/// \brief Represents an explicit C++ type conversion that uses "functional" 1188/// notation (C++ [expr.type.conv]). 1189/// 1190/// Example: 1191/// @code 1192/// x = int(0.5); 1193/// @endcode 1194class CXXFunctionalCastExpr : public ExplicitCastExpr { 1195 SourceLocation TyBeginLoc; 1196 SourceLocation RParenLoc; 1197 1198 CXXFunctionalCastExpr(QualType ty, ExprValueKind VK, 1199 TypeSourceInfo *writtenTy, 1200 SourceLocation tyBeginLoc, CastKind kind, 1201 Expr *castExpr, unsigned pathSize, 1202 SourceLocation rParenLoc) 1203 : ExplicitCastExpr(CXXFunctionalCastExprClass, ty, VK, kind, 1204 castExpr, pathSize, writtenTy), 1205 TyBeginLoc(tyBeginLoc), RParenLoc(rParenLoc) {} 1206 1207 explicit CXXFunctionalCastExpr(EmptyShell Shell, unsigned PathSize) 1208 : ExplicitCastExpr(CXXFunctionalCastExprClass, Shell, PathSize) { } 1209 1210public: 1211 static CXXFunctionalCastExpr *Create(ASTContext &Context, QualType T, 1212 ExprValueKind VK, 1213 TypeSourceInfo *Written, 1214 SourceLocation TyBeginLoc, 1215 CastKind Kind, Expr *Op, 1216 const CXXCastPath *Path, 1217 SourceLocation RPLoc); 1218 static CXXFunctionalCastExpr *CreateEmpty(ASTContext &Context, 1219 unsigned PathSize); 1220 1221 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 1222 void setTypeBeginLoc(SourceLocation L) { TyBeginLoc = L; } 1223 SourceLocation getRParenLoc() const { return RParenLoc; } 1224 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1225 1226 SourceLocation getLocStart() const LLVM_READONLY { return TyBeginLoc; } 1227 SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; } 1228 1229 static bool classof(const Stmt *T) { 1230 return T->getStmtClass() == CXXFunctionalCastExprClass; 1231 } 1232}; 1233 1234/// @brief Represents a C++ functional cast expression that builds a 1235/// temporary object. 1236/// 1237/// This expression type represents a C++ "functional" cast 1238/// (C++[expr.type.conv]) with N != 1 arguments that invokes a 1239/// constructor to build a temporary object. With N == 1 arguments the 1240/// functional cast expression will be represented by CXXFunctionalCastExpr. 1241/// Example: 1242/// @code 1243/// struct X { X(int, float); } 1244/// 1245/// X create_X() { 1246/// return X(1, 3.14f); // creates a CXXTemporaryObjectExpr 1247/// }; 1248/// @endcode 1249class CXXTemporaryObjectExpr : public CXXConstructExpr { 1250 TypeSourceInfo *Type; 1251 1252public: 1253 CXXTemporaryObjectExpr(ASTContext &C, CXXConstructorDecl *Cons, 1254 TypeSourceInfo *Type, 1255 ArrayRef<Expr *> Args, 1256 SourceRange parenRange, 1257 bool HadMultipleCandidates, 1258 bool ListInitialization, 1259 bool ZeroInitialization); 1260 explicit CXXTemporaryObjectExpr(EmptyShell Empty) 1261 : CXXConstructExpr(CXXTemporaryObjectExprClass, Empty), Type() { } 1262 1263 TypeSourceInfo *getTypeSourceInfo() const { return Type; } 1264 1265 SourceLocation getLocStart() const LLVM_READONLY; 1266 SourceLocation getLocEnd() const LLVM_READONLY; 1267 1268 static bool classof(const Stmt *T) { 1269 return T->getStmtClass() == CXXTemporaryObjectExprClass; 1270 } 1271 1272 friend class ASTStmtReader; 1273}; 1274 1275/// \brief A C++ lambda expression, which produces a function object 1276/// (of unspecified type) that can be invoked later. 1277/// 1278/// Example: 1279/// \code 1280/// void low_pass_filter(std::vector<double> &values, double cutoff) { 1281/// values.erase(std::remove_if(values.begin(), values.end(), 1282/// [=](double value) { return value > cutoff; }); 1283/// } 1284/// \endcode 1285/// 1286/// C++11 lambda expressions can capture local variables, either by copying 1287/// the values of those local variables at the time the function 1288/// object is constructed (not when it is called!) or by holding a 1289/// reference to the local variable. These captures can occur either 1290/// implicitly or can be written explicitly between the square 1291/// brackets ([...]) that start the lambda expression. 1292/// 1293/// C++1y introduces a new form of "capture" called an init-capture that 1294/// includes an initializing expression (rather than capturing a variable), 1295/// and which can never occur implicitly. 1296class LambdaExpr : public Expr { 1297 enum { 1298 /// \brief Flag used by the Capture class to indicate that the given 1299 /// capture was implicit. 1300 Capture_Implicit = 0x01, 1301 1302 /// \brief Flag used by the Capture class to indicate that the 1303 /// given capture was by-copy. 1304 /// 1305 /// This includes the case of a non-reference init-capture. 1306 Capture_ByCopy = 0x02 1307 }; 1308 1309 /// \brief The source range that covers the lambda introducer ([...]). 1310 SourceRange IntroducerRange; 1311 1312 /// \brief The number of captures. 1313 unsigned NumCaptures : 16; 1314 1315 /// \brief The default capture kind, which is a value of type 1316 /// LambdaCaptureDefault. 1317 unsigned CaptureDefault : 2; 1318 1319 /// \brief Whether this lambda had an explicit parameter list vs. an 1320 /// implicit (and empty) parameter list. 1321 unsigned ExplicitParams : 1; 1322 1323 /// \brief Whether this lambda had the result type explicitly specified. 1324 unsigned ExplicitResultType : 1; 1325 1326 /// \brief Whether there are any array index variables stored at the end of 1327 /// this lambda expression. 1328 unsigned HasArrayIndexVars : 1; 1329 1330 /// \brief The location of the closing brace ('}') that completes 1331 /// the lambda. 1332 /// 1333 /// The location of the brace is also available by looking up the 1334 /// function call operator in the lambda class. However, it is 1335 /// stored here to improve the performance of getSourceRange(), and 1336 /// to avoid having to deserialize the function call operator from a 1337 /// module file just to determine the source range. 1338 SourceLocation ClosingBrace; 1339 1340 // Note: The capture initializers are stored directly after the lambda 1341 // expression, along with the index variables used to initialize by-copy 1342 // array captures. 1343 1344public: 1345 /// \brief Describes the capture of a variable or of \c this, or of a 1346 /// C++1y init-capture. 1347 class Capture { 1348 llvm::PointerIntPair<Decl *, 2> DeclAndBits; 1349 SourceLocation Loc; 1350 SourceLocation EllipsisLoc; 1351 1352 friend class ASTStmtReader; 1353 friend class ASTStmtWriter; 1354 1355 public: 1356 /// \brief Create a new capture of a variable or of \c this. 1357 /// 1358 /// \param Loc The source location associated with this capture. 1359 /// 1360 /// \param Kind The kind of capture (this, byref, bycopy), which must 1361 /// not be init-capture. 1362 /// 1363 /// \param Implicit Whether the capture was implicit or explicit. 1364 /// 1365 /// \param Var The local variable being captured, or null if capturing 1366 /// \c this. 1367 /// 1368 /// \param EllipsisLoc The location of the ellipsis (...) for a 1369 /// capture that is a pack expansion, or an invalid source 1370 /// location to indicate that this is not a pack expansion. 1371 Capture(SourceLocation Loc, bool Implicit, 1372 LambdaCaptureKind Kind, VarDecl *Var = 0, 1373 SourceLocation EllipsisLoc = SourceLocation()); 1374 1375 /// \brief Create a new init-capture. 1376 Capture(FieldDecl *Field); 1377 1378 /// \brief Determine the kind of capture. 1379 LambdaCaptureKind getCaptureKind() const; 1380 1381 /// \brief Determine whether this capture handles the C++ \c this 1382 /// pointer. 1383 bool capturesThis() const { return DeclAndBits.getPointer() == 0; } 1384 1385 /// \brief Determine whether this capture handles a variable. 1386 bool capturesVariable() const { 1387 return dyn_cast_or_null<VarDecl>(DeclAndBits.getPointer()); 1388 } 1389 1390 /// \brief Determine whether this is an init-capture. 1391 bool isInitCapture() const { return getCaptureKind() == LCK_Init; } 1392 1393 /// \brief Retrieve the declaration of the local variable being 1394 /// captured. 1395 /// 1396 /// This operation is only valid if this capture is a variable capture 1397 /// (other than a capture of \c this). 1398 VarDecl *getCapturedVar() const { 1399 assert(capturesVariable() && "No variable available for 'this' capture"); 1400 return cast<VarDecl>(DeclAndBits.getPointer()); 1401 } 1402 1403 /// \brief Retrieve the field for an init-capture. 1404 /// 1405 /// This works only for an init-capture. To retrieve the FieldDecl for 1406 /// a captured variable or for a capture of \c this, use 1407 /// LambdaExpr::getLambdaClass and CXXRecordDecl::getCaptureFields. 1408 FieldDecl *getInitCaptureField() const { 1409 assert(getCaptureKind() == LCK_Init && "no field for non-init-capture"); 1410 return cast<FieldDecl>(DeclAndBits.getPointer()); 1411 } 1412 1413 /// \brief Determine whether this was an implicit capture (not 1414 /// written between the square brackets introducing the lambda). 1415 bool isImplicit() const { return DeclAndBits.getInt() & Capture_Implicit; } 1416 1417 /// \brief Determine whether this was an explicit capture (written 1418 /// between the square brackets introducing the lambda). 1419 bool isExplicit() const { return !isImplicit(); } 1420 1421 /// \brief Retrieve the source location of the capture. 1422 /// 1423 /// For an explicit capture, this returns the location of the 1424 /// explicit capture in the source. For an implicit capture, this 1425 /// returns the location at which the variable or \c this was first 1426 /// used. 1427 SourceLocation getLocation() const { return Loc; } 1428 1429 /// \brief Determine whether this capture is a pack expansion, 1430 /// which captures a function parameter pack. 1431 bool isPackExpansion() const { return EllipsisLoc.isValid(); } 1432 1433 /// \brief Retrieve the location of the ellipsis for a capture 1434 /// that is a pack expansion. 1435 SourceLocation getEllipsisLoc() const { 1436 assert(isPackExpansion() && "No ellipsis location for a non-expansion"); 1437 return EllipsisLoc; 1438 } 1439 }; 1440 1441private: 1442 /// \brief Construct a lambda expression. 1443 LambdaExpr(QualType T, SourceRange IntroducerRange, 1444 LambdaCaptureDefault CaptureDefault, 1445 ArrayRef<Capture> Captures, 1446 bool ExplicitParams, 1447 bool ExplicitResultType, 1448 ArrayRef<Expr *> CaptureInits, 1449 ArrayRef<VarDecl *> ArrayIndexVars, 1450 ArrayRef<unsigned> ArrayIndexStarts, 1451 SourceLocation ClosingBrace, 1452 bool ContainsUnexpandedParameterPack); 1453 1454 /// \brief Construct an empty lambda expression. 1455 LambdaExpr(EmptyShell Empty, unsigned NumCaptures, bool HasArrayIndexVars) 1456 : Expr(LambdaExprClass, Empty), 1457 NumCaptures(NumCaptures), CaptureDefault(LCD_None), ExplicitParams(false), 1458 ExplicitResultType(false), HasArrayIndexVars(true) { 1459 getStoredStmts()[NumCaptures] = 0; 1460 } 1461 1462 Stmt **getStoredStmts() const { 1463 return reinterpret_cast<Stmt **>(const_cast<LambdaExpr *>(this) + 1); 1464 } 1465 1466 /// \brief Retrieve the mapping from captures to the first array index 1467 /// variable. 1468 unsigned *getArrayIndexStarts() const { 1469 return reinterpret_cast<unsigned *>(getStoredStmts() + NumCaptures + 1); 1470 } 1471 1472 /// \brief Retrieve the complete set of array-index variables. 1473 VarDecl **getArrayIndexVars() const { 1474 unsigned ArrayIndexSize = 1475 llvm::RoundUpToAlignment(sizeof(unsigned) * (NumCaptures + 1), 1476 llvm::alignOf<VarDecl*>()); 1477 return reinterpret_cast<VarDecl **>( 1478 reinterpret_cast<char*>(getArrayIndexStarts()) + ArrayIndexSize); 1479 } 1480 1481public: 1482 /// \brief Construct a new lambda expression. 1483 static LambdaExpr *Create(ASTContext &C, 1484 CXXRecordDecl *Class, 1485 SourceRange IntroducerRange, 1486 LambdaCaptureDefault CaptureDefault, 1487 ArrayRef<Capture> Captures, 1488 bool ExplicitParams, 1489 bool ExplicitResultType, 1490 ArrayRef<Expr *> CaptureInits, 1491 ArrayRef<VarDecl *> ArrayIndexVars, 1492 ArrayRef<unsigned> ArrayIndexStarts, 1493 SourceLocation ClosingBrace, 1494 bool ContainsUnexpandedParameterPack); 1495 1496 /// \brief Construct a new lambda expression that will be deserialized from 1497 /// an external source. 1498 static LambdaExpr *CreateDeserialized(ASTContext &C, unsigned NumCaptures, 1499 unsigned NumArrayIndexVars); 1500 1501 /// \brief Determine the default capture kind for this lambda. 1502 LambdaCaptureDefault getCaptureDefault() const { 1503 return static_cast<LambdaCaptureDefault>(CaptureDefault); 1504 } 1505 1506 /// \brief An iterator that walks over the captures of the lambda, 1507 /// both implicit and explicit. 1508 typedef const Capture *capture_iterator; 1509 1510 /// \brief Retrieve an iterator pointing to the first lambda capture. 1511 capture_iterator capture_begin() const; 1512 1513 /// \brief Retrieve an iterator pointing past the end of the 1514 /// sequence of lambda captures. 1515 capture_iterator capture_end() const; 1516 1517 /// \brief Determine the number of captures in this lambda. 1518 unsigned capture_size() const { return NumCaptures; } 1519 1520 /// \brief Retrieve an iterator pointing to the first explicit 1521 /// lambda capture. 1522 capture_iterator explicit_capture_begin() const; 1523 1524 /// \brief Retrieve an iterator pointing past the end of the sequence of 1525 /// explicit lambda captures. 1526 capture_iterator explicit_capture_end() const; 1527 1528 /// \brief Retrieve an iterator pointing to the first implicit 1529 /// lambda capture. 1530 capture_iterator implicit_capture_begin() const; 1531 1532 /// \brief Retrieve an iterator pointing past the end of the sequence of 1533 /// implicit lambda captures. 1534 capture_iterator implicit_capture_end() const; 1535 1536 /// \brief Iterator that walks over the capture initialization 1537 /// arguments. 1538 typedef Expr **capture_init_iterator; 1539 1540 /// \brief Retrieve the first initialization argument for this 1541 /// lambda expression (which initializes the first capture field). 1542 capture_init_iterator capture_init_begin() const { 1543 return reinterpret_cast<Expr **>(getStoredStmts()); 1544 } 1545 1546 /// \brief Retrieve the iterator pointing one past the last 1547 /// initialization argument for this lambda expression. 1548 capture_init_iterator capture_init_end() const { 1549 return capture_init_begin() + NumCaptures; 1550 } 1551 1552 /// \brief Retrieve the initializer for an init-capture. 1553 Expr *getInitCaptureInit(capture_iterator Capture) { 1554 assert(Capture >= explicit_capture_begin() && 1555 Capture <= explicit_capture_end() && Capture->isInitCapture()); 1556 return capture_init_begin()[Capture - capture_begin()]; 1557 } 1558 const Expr *getInitCaptureInit(capture_iterator Capture) const { 1559 return const_cast<LambdaExpr*>(this)->getInitCaptureInit(Capture); 1560 } 1561 1562 /// \brief Retrieve the set of index variables used in the capture 1563 /// initializer of an array captured by copy. 1564 /// 1565 /// \param Iter The iterator that points at the capture initializer for 1566 /// which we are extracting the corresponding index variables. 1567 ArrayRef<VarDecl *> getCaptureInitIndexVars(capture_init_iterator Iter) const; 1568 1569 /// \brief Retrieve the source range covering the lambda introducer, 1570 /// which contains the explicit capture list surrounded by square 1571 /// brackets ([...]). 1572 SourceRange getIntroducerRange() const { return IntroducerRange; } 1573 1574 /// \brief Retrieve the class that corresponds to the lambda, which 1575 /// stores the captures in its fields and provides the various 1576 /// operations permitted on a lambda (copying, calling). 1577 CXXRecordDecl *getLambdaClass() const; 1578 1579 /// \brief Retrieve the function call operator associated with this 1580 /// lambda expression. 1581 CXXMethodDecl *getCallOperator() const; 1582 1583 /// \brief Retrieve the body of the lambda. 1584 CompoundStmt *getBody() const; 1585 1586 /// \brief Determine whether the lambda is mutable, meaning that any 1587 /// captures values can be modified. 1588 bool isMutable() const; 1589 1590 /// \brief Determine whether this lambda has an explicit parameter 1591 /// list vs. an implicit (empty) parameter list. 1592 bool hasExplicitParameters() const { return ExplicitParams; } 1593 1594 /// \brief Whether this lambda had its result type explicitly specified. 1595 bool hasExplicitResultType() const { return ExplicitResultType; } 1596 1597 static bool classof(const Stmt *T) { 1598 return T->getStmtClass() == LambdaExprClass; 1599 } 1600 1601 SourceLocation getLocStart() const LLVM_READONLY { 1602 return IntroducerRange.getBegin(); 1603 } 1604 SourceLocation getLocEnd() const LLVM_READONLY { return ClosingBrace; } 1605 1606 child_range children() { 1607 return child_range(getStoredStmts(), getStoredStmts() + NumCaptures + 1); 1608 } 1609 1610 friend class ASTStmtReader; 1611 friend class ASTStmtWriter; 1612}; 1613 1614/// CXXScalarValueInitExpr - [C++ 5.2.3p2] 1615/// Expression "T()" which creates a value-initialized rvalue of type 1616/// T, which is a non-class type. 1617/// 1618class CXXScalarValueInitExpr : public Expr { 1619 SourceLocation RParenLoc; 1620 TypeSourceInfo *TypeInfo; 1621 1622 friend class ASTStmtReader; 1623 1624public: 1625 /// \brief Create an explicitly-written scalar-value initialization 1626 /// expression. 1627 CXXScalarValueInitExpr(QualType Type, 1628 TypeSourceInfo *TypeInfo, 1629 SourceLocation rParenLoc ) : 1630 Expr(CXXScalarValueInitExprClass, Type, VK_RValue, OK_Ordinary, 1631 false, false, Type->isInstantiationDependentType(), false), 1632 RParenLoc(rParenLoc), TypeInfo(TypeInfo) {} 1633 1634 explicit CXXScalarValueInitExpr(EmptyShell Shell) 1635 : Expr(CXXScalarValueInitExprClass, Shell) { } 1636 1637 TypeSourceInfo *getTypeSourceInfo() const { 1638 return TypeInfo; 1639 } 1640 1641 SourceLocation getRParenLoc() const { return RParenLoc; } 1642 1643 SourceLocation getLocStart() const LLVM_READONLY; 1644 SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; } 1645 1646 static bool classof(const Stmt *T) { 1647 return T->getStmtClass() == CXXScalarValueInitExprClass; 1648 } 1649 1650 // Iterators 1651 child_range children() { return child_range(); } 1652}; 1653 1654/// @brief Represents a new-expression for memory allocation and constructor 1655// calls, e.g: "new CXXNewExpr(foo)". 1656class CXXNewExpr : public Expr { 1657 // Contains an optional array size expression, an optional initialization 1658 // expression, and any number of optional placement arguments, in that order. 1659 Stmt **SubExprs; 1660 /// \brief Points to the allocation function used. 1661 FunctionDecl *OperatorNew; 1662 /// \brief Points to the deallocation function used in case of error. May be 1663 /// null. 1664 FunctionDecl *OperatorDelete; 1665 1666 /// \brief The allocated type-source information, as written in the source. 1667 TypeSourceInfo *AllocatedTypeInfo; 1668 1669 /// \brief If the allocated type was expressed as a parenthesized type-id, 1670 /// the source range covering the parenthesized type-id. 1671 SourceRange TypeIdParens; 1672 1673 /// \brief Range of the entire new expression. 1674 SourceRange Range; 1675 1676 /// \brief Source-range of a paren-delimited initializer. 1677 SourceRange DirectInitRange; 1678 1679 // Was the usage ::new, i.e. is the global new to be used? 1680 bool GlobalNew : 1; 1681 // Do we allocate an array? If so, the first SubExpr is the size expression. 1682 bool Array : 1; 1683 // If this is an array allocation, does the usual deallocation 1684 // function for the allocated type want to know the allocated size? 1685 bool UsualArrayDeleteWantsSize : 1; 1686 // The number of placement new arguments. 1687 unsigned NumPlacementArgs : 13; 1688 // What kind of initializer do we have? Could be none, parens, or braces. 1689 // In storage, we distinguish between "none, and no initializer expr", and 1690 // "none, but an implicit initializer expr". 1691 unsigned StoredInitializationStyle : 2; 1692 1693 friend class ASTStmtReader; 1694 friend class ASTStmtWriter; 1695public: 1696 enum InitializationStyle { 1697 NoInit, ///< New-expression has no initializer as written. 1698 CallInit, ///< New-expression has a C++98 paren-delimited initializer. 1699 ListInit ///< New-expression has a C++11 list-initializer. 1700 }; 1701 1702 CXXNewExpr(ASTContext &C, bool globalNew, FunctionDecl *operatorNew, 1703 FunctionDecl *operatorDelete, bool usualArrayDeleteWantsSize, 1704 ArrayRef<Expr*> placementArgs, 1705 SourceRange typeIdParens, Expr *arraySize, 1706 InitializationStyle initializationStyle, Expr *initializer, 1707 QualType ty, TypeSourceInfo *AllocatedTypeInfo, 1708 SourceRange Range, SourceRange directInitRange); 1709 explicit CXXNewExpr(EmptyShell Shell) 1710 : Expr(CXXNewExprClass, Shell), SubExprs(0) { } 1711 1712 void AllocateArgsArray(ASTContext &C, bool isArray, unsigned numPlaceArgs, 1713 bool hasInitializer); 1714 1715 QualType getAllocatedType() const { 1716 assert(getType()->isPointerType()); 1717 return getType()->getAs<PointerType>()->getPointeeType(); 1718 } 1719 1720 TypeSourceInfo *getAllocatedTypeSourceInfo() const { 1721 return AllocatedTypeInfo; 1722 } 1723 1724 /// \brief True if the allocation result needs to be null-checked. 1725 /// C++0x [expr.new]p13: 1726 /// If the allocation function returns null, initialization shall 1727 /// not be done, the deallocation function shall not be called, 1728 /// and the value of the new-expression shall be null. 1729 /// An allocation function is not allowed to return null unless it 1730 /// has a non-throwing exception-specification. The '03 rule is 1731 /// identical except that the definition of a non-throwing 1732 /// exception specification is just "is it throw()?". 1733 bool shouldNullCheckAllocation(ASTContext &Ctx) const; 1734 1735 FunctionDecl *getOperatorNew() const { return OperatorNew; } 1736 void setOperatorNew(FunctionDecl *D) { OperatorNew = D; } 1737 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 1738 void setOperatorDelete(FunctionDecl *D) { OperatorDelete = D; } 1739 1740 bool isArray() const { return Array; } 1741 Expr *getArraySize() { 1742 return Array ? cast<Expr>(SubExprs[0]) : 0; 1743 } 1744 const Expr *getArraySize() const { 1745 return Array ? cast<Expr>(SubExprs[0]) : 0; 1746 } 1747 1748 unsigned getNumPlacementArgs() const { return NumPlacementArgs; } 1749 Expr **getPlacementArgs() { 1750 return reinterpret_cast<Expr **>(SubExprs + Array + hasInitializer()); 1751 } 1752 1753 Expr *getPlacementArg(unsigned i) { 1754 assert(i < NumPlacementArgs && "Index out of range"); 1755 return getPlacementArgs()[i]; 1756 } 1757 const Expr *getPlacementArg(unsigned i) const { 1758 assert(i < NumPlacementArgs && "Index out of range"); 1759 return const_cast<CXXNewExpr*>(this)->getPlacementArg(i); 1760 } 1761 1762 bool isParenTypeId() const { return TypeIdParens.isValid(); } 1763 SourceRange getTypeIdParens() const { return TypeIdParens; } 1764 1765 bool isGlobalNew() const { return GlobalNew; } 1766 1767 /// \brief Whether this new-expression has any initializer at all. 1768 bool hasInitializer() const { return StoredInitializationStyle > 0; } 1769 1770 /// \brief The kind of initializer this new-expression has. 1771 InitializationStyle getInitializationStyle() const { 1772 if (StoredInitializationStyle == 0) 1773 return NoInit; 1774 return static_cast<InitializationStyle>(StoredInitializationStyle-1); 1775 } 1776 1777 /// \brief The initializer of this new-expression. 1778 Expr *getInitializer() { 1779 return hasInitializer() ? cast<Expr>(SubExprs[Array]) : 0; 1780 } 1781 const Expr *getInitializer() const { 1782 return hasInitializer() ? cast<Expr>(SubExprs[Array]) : 0; 1783 } 1784 1785 /// \brief Returns the CXXConstructExpr from this new-expression, or NULL. 1786 const CXXConstructExpr* getConstructExpr() const { 1787 return dyn_cast_or_null<CXXConstructExpr>(getInitializer()); 1788 } 1789 1790 /// Answers whether the usual array deallocation function for the 1791 /// allocated type expects the size of the allocation as a 1792 /// parameter. 1793 bool doesUsualArrayDeleteWantSize() const { 1794 return UsualArrayDeleteWantsSize; 1795 } 1796 1797 typedef ExprIterator arg_iterator; 1798 typedef ConstExprIterator const_arg_iterator; 1799 1800 arg_iterator placement_arg_begin() { 1801 return SubExprs + Array + hasInitializer(); 1802 } 1803 arg_iterator placement_arg_end() { 1804 return SubExprs + Array + hasInitializer() + getNumPlacementArgs(); 1805 } 1806 const_arg_iterator placement_arg_begin() const { 1807 return SubExprs + Array + hasInitializer(); 1808 } 1809 const_arg_iterator placement_arg_end() const { 1810 return SubExprs + Array + hasInitializer() + getNumPlacementArgs(); 1811 } 1812 1813 typedef Stmt **raw_arg_iterator; 1814 raw_arg_iterator raw_arg_begin() { return SubExprs; } 1815 raw_arg_iterator raw_arg_end() { 1816 return SubExprs + Array + hasInitializer() + getNumPlacementArgs(); 1817 } 1818 const_arg_iterator raw_arg_begin() const { return SubExprs; } 1819 const_arg_iterator raw_arg_end() const { 1820 return SubExprs + Array + hasInitializer() + getNumPlacementArgs(); 1821 } 1822 1823 SourceLocation getStartLoc() const { return Range.getBegin(); } 1824 SourceLocation getEndLoc() const { return Range.getEnd(); } 1825 1826 SourceRange getDirectInitRange() const { return DirectInitRange; } 1827 1828 SourceRange getSourceRange() const LLVM_READONLY { 1829 return Range; 1830 } 1831 SourceLocation getLocStart() const LLVM_READONLY { return getStartLoc(); } 1832 SourceLocation getLocEnd() const LLVM_READONLY { return getEndLoc(); } 1833 1834 static bool classof(const Stmt *T) { 1835 return T->getStmtClass() == CXXNewExprClass; 1836 } 1837 1838 // Iterators 1839 child_range children() { 1840 return child_range(raw_arg_begin(), raw_arg_end()); 1841 } 1842}; 1843 1844/// \brief Represents a \c delete expression for memory deallocation and 1845/// destructor calls, e.g. "delete[] pArray". 1846class CXXDeleteExpr : public Expr { 1847 // Points to the operator delete overload that is used. Could be a member. 1848 FunctionDecl *OperatorDelete; 1849 // The pointer expression to be deleted. 1850 Stmt *Argument; 1851 // Location of the expression. 1852 SourceLocation Loc; 1853 // Is this a forced global delete, i.e. "::delete"? 1854 bool GlobalDelete : 1; 1855 // Is this the array form of delete, i.e. "delete[]"? 1856 bool ArrayForm : 1; 1857 // ArrayFormAsWritten can be different from ArrayForm if 'delete' is applied 1858 // to pointer-to-array type (ArrayFormAsWritten will be false while ArrayForm 1859 // will be true). 1860 bool ArrayFormAsWritten : 1; 1861 // Does the usual deallocation function for the element type require 1862 // a size_t argument? 1863 bool UsualArrayDeleteWantsSize : 1; 1864public: 1865 CXXDeleteExpr(QualType ty, bool globalDelete, bool arrayForm, 1866 bool arrayFormAsWritten, bool usualArrayDeleteWantsSize, 1867 FunctionDecl *operatorDelete, Expr *arg, SourceLocation loc) 1868 : Expr(CXXDeleteExprClass, ty, VK_RValue, OK_Ordinary, false, false, 1869 arg->isInstantiationDependent(), 1870 arg->containsUnexpandedParameterPack()), 1871 OperatorDelete(operatorDelete), Argument(arg), Loc(loc), 1872 GlobalDelete(globalDelete), 1873 ArrayForm(arrayForm), ArrayFormAsWritten(arrayFormAsWritten), 1874 UsualArrayDeleteWantsSize(usualArrayDeleteWantsSize) { } 1875 explicit CXXDeleteExpr(EmptyShell Shell) 1876 : Expr(CXXDeleteExprClass, Shell), OperatorDelete(0), Argument(0) { } 1877 1878 bool isGlobalDelete() const { return GlobalDelete; } 1879 bool isArrayForm() const { return ArrayForm; } 1880 bool isArrayFormAsWritten() const { return ArrayFormAsWritten; } 1881 1882 /// Answers whether the usual array deallocation function for the 1883 /// allocated type expects the size of the allocation as a 1884 /// parameter. This can be true even if the actual deallocation 1885 /// function that we're using doesn't want a size. 1886 bool doesUsualArrayDeleteWantSize() const { 1887 return UsualArrayDeleteWantsSize; 1888 } 1889 1890 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 1891 1892 Expr *getArgument() { return cast<Expr>(Argument); } 1893 const Expr *getArgument() const { return cast<Expr>(Argument); } 1894 1895 /// \brief Retrieve the type being destroyed. If the type being 1896 /// destroyed is a dependent type which may or may not be a pointer, 1897 /// return an invalid type. 1898 QualType getDestroyedType() const; 1899 1900 SourceLocation getLocStart() const LLVM_READONLY { return Loc; } 1901 SourceLocation getLocEnd() const LLVM_READONLY {return Argument->getLocEnd();} 1902 1903 static bool classof(const Stmt *T) { 1904 return T->getStmtClass() == CXXDeleteExprClass; 1905 } 1906 1907 // Iterators 1908 child_range children() { return child_range(&Argument, &Argument+1); } 1909 1910 friend class ASTStmtReader; 1911}; 1912 1913/// \brief Stores the type being destroyed by a pseudo-destructor expression. 1914class PseudoDestructorTypeStorage { 1915 /// \brief Either the type source information or the name of the type, if 1916 /// it couldn't be resolved due to type-dependence. 1917 llvm::PointerUnion<TypeSourceInfo *, IdentifierInfo *> Type; 1918 1919 /// \brief The starting source location of the pseudo-destructor type. 1920 SourceLocation Location; 1921 1922public: 1923 PseudoDestructorTypeStorage() { } 1924 1925 PseudoDestructorTypeStorage(IdentifierInfo *II, SourceLocation Loc) 1926 : Type(II), Location(Loc) { } 1927 1928 PseudoDestructorTypeStorage(TypeSourceInfo *Info); 1929 1930 TypeSourceInfo *getTypeSourceInfo() const { 1931 return Type.dyn_cast<TypeSourceInfo *>(); 1932 } 1933 1934 IdentifierInfo *getIdentifier() const { 1935 return Type.dyn_cast<IdentifierInfo *>(); 1936 } 1937 1938 SourceLocation getLocation() const { return Location; } 1939}; 1940 1941/// \brief Represents a C++ pseudo-destructor (C++ [expr.pseudo]). 1942/// 1943/// A pseudo-destructor is an expression that looks like a member access to a 1944/// destructor of a scalar type, except that scalar types don't have 1945/// destructors. For example: 1946/// 1947/// \code 1948/// typedef int T; 1949/// void f(int *p) { 1950/// p->T::~T(); 1951/// } 1952/// \endcode 1953/// 1954/// Pseudo-destructors typically occur when instantiating templates such as: 1955/// 1956/// \code 1957/// template<typename T> 1958/// void destroy(T* ptr) { 1959/// ptr->T::~T(); 1960/// } 1961/// \endcode 1962/// 1963/// for scalar types. A pseudo-destructor expression has no run-time semantics 1964/// beyond evaluating the base expression. 1965class CXXPseudoDestructorExpr : public Expr { 1966 /// \brief The base expression (that is being destroyed). 1967 Stmt *Base; 1968 1969 /// \brief Whether the operator was an arrow ('->'); otherwise, it was a 1970 /// period ('.'). 1971 bool IsArrow : 1; 1972 1973 /// \brief The location of the '.' or '->' operator. 1974 SourceLocation OperatorLoc; 1975 1976 /// \brief The nested-name-specifier that follows the operator, if present. 1977 NestedNameSpecifierLoc QualifierLoc; 1978 1979 /// \brief The type that precedes the '::' in a qualified pseudo-destructor 1980 /// expression. 1981 TypeSourceInfo *ScopeType; 1982 1983 /// \brief The location of the '::' in a qualified pseudo-destructor 1984 /// expression. 1985 SourceLocation ColonColonLoc; 1986 1987 /// \brief The location of the '~'. 1988 SourceLocation TildeLoc; 1989 1990 /// \brief The type being destroyed, or its name if we were unable to 1991 /// resolve the name. 1992 PseudoDestructorTypeStorage DestroyedType; 1993 1994 friend class ASTStmtReader; 1995 1996public: 1997 CXXPseudoDestructorExpr(ASTContext &Context, 1998 Expr *Base, bool isArrow, SourceLocation OperatorLoc, 1999 NestedNameSpecifierLoc QualifierLoc, 2000 TypeSourceInfo *ScopeType, 2001 SourceLocation ColonColonLoc, 2002 SourceLocation TildeLoc, 2003 PseudoDestructorTypeStorage DestroyedType); 2004 2005 explicit CXXPseudoDestructorExpr(EmptyShell Shell) 2006 : Expr(CXXPseudoDestructorExprClass, Shell), 2007 Base(0), IsArrow(false), QualifierLoc(), ScopeType(0) { } 2008 2009 Expr *getBase() const { return cast<Expr>(Base); } 2010 2011 /// \brief Determines whether this member expression actually had 2012 /// a C++ nested-name-specifier prior to the name of the member, e.g., 2013 /// x->Base::foo. 2014 bool hasQualifier() const { return QualifierLoc.hasQualifier(); } 2015 2016 /// \brief Retrieves the nested-name-specifier that qualifies the type name, 2017 /// with source-location information. 2018 NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } 2019 2020 /// \brief If the member name was qualified, retrieves the 2021 /// nested-name-specifier that precedes the member name. Otherwise, returns 2022 /// NULL. 2023 NestedNameSpecifier *getQualifier() const { 2024 return QualifierLoc.getNestedNameSpecifier(); 2025 } 2026 2027 /// \brief Determine whether this pseudo-destructor expression was written 2028 /// using an '->' (otherwise, it used a '.'). 2029 bool isArrow() const { return IsArrow; } 2030 2031 /// \brief Retrieve the location of the '.' or '->' operator. 2032 SourceLocation getOperatorLoc() const { return OperatorLoc; } 2033 2034 /// \brief Retrieve the scope type in a qualified pseudo-destructor 2035 /// expression. 2036 /// 2037 /// Pseudo-destructor expressions can have extra qualification within them 2038 /// that is not part of the nested-name-specifier, e.g., \c p->T::~T(). 2039 /// Here, if the object type of the expression is (or may be) a scalar type, 2040 /// \p T may also be a scalar type and, therefore, cannot be part of a 2041 /// nested-name-specifier. It is stored as the "scope type" of the pseudo- 2042 /// destructor expression. 2043 TypeSourceInfo *getScopeTypeInfo() const { return ScopeType; } 2044 2045 /// \brief Retrieve the location of the '::' in a qualified pseudo-destructor 2046 /// expression. 2047 SourceLocation getColonColonLoc() const { return ColonColonLoc; } 2048 2049 /// \brief Retrieve the location of the '~'. 2050 SourceLocation getTildeLoc() const { return TildeLoc; } 2051 2052 /// \brief Retrieve the source location information for the type 2053 /// being destroyed. 2054 /// 2055 /// This type-source information is available for non-dependent 2056 /// pseudo-destructor expressions and some dependent pseudo-destructor 2057 /// expressions. Returns NULL if we only have the identifier for a 2058 /// dependent pseudo-destructor expression. 2059 TypeSourceInfo *getDestroyedTypeInfo() const { 2060 return DestroyedType.getTypeSourceInfo(); 2061 } 2062 2063 /// \brief In a dependent pseudo-destructor expression for which we do not 2064 /// have full type information on the destroyed type, provides the name 2065 /// of the destroyed type. 2066 IdentifierInfo *getDestroyedTypeIdentifier() const { 2067 return DestroyedType.getIdentifier(); 2068 } 2069 2070 /// \brief Retrieve the type being destroyed. 2071 QualType getDestroyedType() const; 2072 2073 /// \brief Retrieve the starting location of the type being destroyed. 2074 SourceLocation getDestroyedTypeLoc() const { 2075 return DestroyedType.getLocation(); 2076 } 2077 2078 /// \brief Set the name of destroyed type for a dependent pseudo-destructor 2079 /// expression. 2080 void setDestroyedType(IdentifierInfo *II, SourceLocation Loc) { 2081 DestroyedType = PseudoDestructorTypeStorage(II, Loc); 2082 } 2083 2084 /// \brief Set the destroyed type. 2085 void setDestroyedType(TypeSourceInfo *Info) { 2086 DestroyedType = PseudoDestructorTypeStorage(Info); 2087 } 2088 2089 SourceLocation getLocStart() const LLVM_READONLY {return Base->getLocStart();} 2090 SourceLocation getLocEnd() const LLVM_READONLY; 2091 2092 static bool classof(const Stmt *T) { 2093 return T->getStmtClass() == CXXPseudoDestructorExprClass; 2094 } 2095 2096 // Iterators 2097 child_range children() { return child_range(&Base, &Base + 1); } 2098}; 2099 2100/// \brief Represents a GCC or MS unary type trait, as used in the 2101/// implementation of TR1/C++11 type trait templates. 2102/// 2103/// Example: 2104/// @code 2105/// __is_pod(int) == true 2106/// __is_enum(std::string) == false 2107/// @endcode 2108class UnaryTypeTraitExpr : public Expr { 2109 /// UTT - The trait. A UnaryTypeTrait enum in MSVC compat unsigned. 2110 unsigned UTT : 31; 2111 /// The value of the type trait. Unspecified if dependent. 2112 bool Value : 1; 2113 2114 /// Loc - The location of the type trait keyword. 2115 SourceLocation Loc; 2116 2117 /// RParen - The location of the closing paren. 2118 SourceLocation RParen; 2119 2120 /// The type being queried. 2121 TypeSourceInfo *QueriedType; 2122 2123public: 2124 UnaryTypeTraitExpr(SourceLocation loc, UnaryTypeTrait utt, 2125 TypeSourceInfo *queried, bool value, 2126 SourceLocation rparen, QualType ty) 2127 : Expr(UnaryTypeTraitExprClass, ty, VK_RValue, OK_Ordinary, 2128 false, queried->getType()->isDependentType(), 2129 queried->getType()->isInstantiationDependentType(), 2130 queried->getType()->containsUnexpandedParameterPack()), 2131 UTT(utt), Value(value), Loc(loc), RParen(rparen), QueriedType(queried) { } 2132 2133 explicit UnaryTypeTraitExpr(EmptyShell Empty) 2134 : Expr(UnaryTypeTraitExprClass, Empty), UTT(0), Value(false), 2135 QueriedType() { } 2136 2137 SourceLocation getLocStart() const LLVM_READONLY { return Loc; } 2138 SourceLocation getLocEnd() const LLVM_READONLY { return RParen; } 2139 2140 UnaryTypeTrait getTrait() const { return static_cast<UnaryTypeTrait>(UTT); } 2141 2142 QualType getQueriedType() const { return QueriedType->getType(); } 2143 2144 TypeSourceInfo *getQueriedTypeSourceInfo() const { return QueriedType; } 2145 2146 bool getValue() const { return Value; } 2147 2148 static bool classof(const Stmt *T) { 2149 return T->getStmtClass() == UnaryTypeTraitExprClass; 2150 } 2151 2152 // Iterators 2153 child_range children() { return child_range(); } 2154 2155 friend class ASTStmtReader; 2156}; 2157 2158/// \brief Represents a GCC or MS binary type trait, as used in the 2159/// implementation of TR1/C++11 type trait templates. 2160/// 2161/// Example: 2162/// @code 2163/// __is_base_of(Base, Derived) == true 2164/// @endcode 2165class BinaryTypeTraitExpr : public Expr { 2166 /// BTT - The trait. A BinaryTypeTrait enum in MSVC compat unsigned. 2167 unsigned BTT : 8; 2168 2169 /// The value of the type trait. Unspecified if dependent. 2170 bool Value : 1; 2171 2172 /// Loc - The location of the type trait keyword. 2173 SourceLocation Loc; 2174 2175 /// RParen - The location of the closing paren. 2176 SourceLocation RParen; 2177 2178 /// The lhs type being queried. 2179 TypeSourceInfo *LhsType; 2180 2181 /// The rhs type being queried. 2182 TypeSourceInfo *RhsType; 2183 2184public: 2185 BinaryTypeTraitExpr(SourceLocation loc, BinaryTypeTrait btt, 2186 TypeSourceInfo *lhsType, TypeSourceInfo *rhsType, 2187 bool value, SourceLocation rparen, QualType ty) 2188 : Expr(BinaryTypeTraitExprClass, ty, VK_RValue, OK_Ordinary, false, 2189 lhsType->getType()->isDependentType() || 2190 rhsType->getType()->isDependentType(), 2191 (lhsType->getType()->isInstantiationDependentType() || 2192 rhsType->getType()->isInstantiationDependentType()), 2193 (lhsType->getType()->containsUnexpandedParameterPack() || 2194 rhsType->getType()->containsUnexpandedParameterPack())), 2195 BTT(btt), Value(value), Loc(loc), RParen(rparen), 2196 LhsType(lhsType), RhsType(rhsType) { } 2197 2198 2199 explicit BinaryTypeTraitExpr(EmptyShell Empty) 2200 : Expr(BinaryTypeTraitExprClass, Empty), BTT(0), Value(false), 2201 LhsType(), RhsType() { } 2202 2203 SourceLocation getLocStart() const LLVM_READONLY { return Loc; } 2204 SourceLocation getLocEnd() const LLVM_READONLY { return RParen; } 2205 2206 BinaryTypeTrait getTrait() const { 2207 return static_cast<BinaryTypeTrait>(BTT); 2208 } 2209 2210 QualType getLhsType() const { return LhsType->getType(); } 2211 QualType getRhsType() const { return RhsType->getType(); } 2212 2213 TypeSourceInfo *getLhsTypeSourceInfo() const { return LhsType; } 2214 TypeSourceInfo *getRhsTypeSourceInfo() const { return RhsType; } 2215 2216 bool getValue() const { assert(!isTypeDependent()); return Value; } 2217 2218 static bool classof(const Stmt *T) { 2219 return T->getStmtClass() == BinaryTypeTraitExprClass; 2220 } 2221 2222 // Iterators 2223 child_range children() { return child_range(); } 2224 2225 friend class ASTStmtReader; 2226}; 2227 2228/// \brief A type trait used in the implementation of various C++11 and 2229/// Library TR1 trait templates. 2230/// 2231/// \code 2232/// __is_trivially_constructible(vector<int>, int*, int*) 2233/// \endcode 2234class TypeTraitExpr : public Expr { 2235 /// \brief The location of the type trait keyword. 2236 SourceLocation Loc; 2237 2238 /// \brief The location of the closing parenthesis. 2239 SourceLocation RParenLoc; 2240 2241 // Note: The TypeSourceInfos for the arguments are allocated after the 2242 // TypeTraitExpr. 2243 2244 TypeTraitExpr(QualType T, SourceLocation Loc, TypeTrait Kind, 2245 ArrayRef<TypeSourceInfo *> Args, 2246 SourceLocation RParenLoc, 2247 bool Value); 2248 2249 TypeTraitExpr(EmptyShell Empty) : Expr(TypeTraitExprClass, Empty) { } 2250 2251 /// \brief Retrieve the argument types. 2252 TypeSourceInfo **getTypeSourceInfos() { 2253 return reinterpret_cast<TypeSourceInfo **>(this+1); 2254 } 2255 2256 /// \brief Retrieve the argument types. 2257 TypeSourceInfo * const *getTypeSourceInfos() const { 2258 return reinterpret_cast<TypeSourceInfo * const*>(this+1); 2259 } 2260 2261public: 2262 /// \brief Create a new type trait expression. 2263 static TypeTraitExpr *Create(ASTContext &C, QualType T, SourceLocation Loc, 2264 TypeTrait Kind, 2265 ArrayRef<TypeSourceInfo *> Args, 2266 SourceLocation RParenLoc, 2267 bool Value); 2268 2269 static TypeTraitExpr *CreateDeserialized(ASTContext &C, unsigned NumArgs); 2270 2271 /// \brief Determine which type trait this expression uses. 2272 TypeTrait getTrait() const { 2273 return static_cast<TypeTrait>(TypeTraitExprBits.Kind); 2274 } 2275 2276 bool getValue() const { 2277 assert(!isValueDependent()); 2278 return TypeTraitExprBits.Value; 2279 } 2280 2281 /// \brief Determine the number of arguments to this type trait. 2282 unsigned getNumArgs() const { return TypeTraitExprBits.NumArgs; } 2283 2284 /// \brief Retrieve the Ith argument. 2285 TypeSourceInfo *getArg(unsigned I) const { 2286 assert(I < getNumArgs() && "Argument out-of-range"); 2287 return getArgs()[I]; 2288 } 2289 2290 /// \brief Retrieve the argument types. 2291 ArrayRef<TypeSourceInfo *> getArgs() const { 2292 return ArrayRef<TypeSourceInfo *>(getTypeSourceInfos(), getNumArgs()); 2293 } 2294 2295 typedef TypeSourceInfo **arg_iterator; 2296 arg_iterator arg_begin() { 2297 return getTypeSourceInfos(); 2298 } 2299 arg_iterator arg_end() { 2300 return getTypeSourceInfos() + getNumArgs(); 2301 } 2302 2303 typedef TypeSourceInfo const * const *arg_const_iterator; 2304 arg_const_iterator arg_begin() const { return getTypeSourceInfos(); } 2305 arg_const_iterator arg_end() const { 2306 return getTypeSourceInfos() + getNumArgs(); 2307 } 2308 2309 SourceLocation getLocStart() const LLVM_READONLY { return Loc; } 2310 SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; } 2311 2312 static bool classof(const Stmt *T) { 2313 return T->getStmtClass() == TypeTraitExprClass; 2314 } 2315 2316 // Iterators 2317 child_range children() { return child_range(); } 2318 2319 friend class ASTStmtReader; 2320 friend class ASTStmtWriter; 2321 2322}; 2323 2324/// \brief An Embarcadero array type trait, as used in the implementation of 2325/// __array_rank and __array_extent. 2326/// 2327/// Example: 2328/// @code 2329/// __array_rank(int[10][20]) == 2 2330/// __array_extent(int, 1) == 20 2331/// @endcode 2332class ArrayTypeTraitExpr : public Expr { 2333 virtual void anchor(); 2334 2335 /// \brief The trait. An ArrayTypeTrait enum in MSVC compat unsigned. 2336 unsigned ATT : 2; 2337 2338 /// \brief The value of the type trait. Unspecified if dependent. 2339 uint64_t Value; 2340 2341 /// \brief The array dimension being queried, or -1 if not used. 2342 Expr *Dimension; 2343 2344 /// \brief The location of the type trait keyword. 2345 SourceLocation Loc; 2346 2347 /// \brief The location of the closing paren. 2348 SourceLocation RParen; 2349 2350 /// \brief The type being queried. 2351 TypeSourceInfo *QueriedType; 2352 2353public: 2354 ArrayTypeTraitExpr(SourceLocation loc, ArrayTypeTrait att, 2355 TypeSourceInfo *queried, uint64_t value, 2356 Expr *dimension, SourceLocation rparen, QualType ty) 2357 : Expr(ArrayTypeTraitExprClass, ty, VK_RValue, OK_Ordinary, 2358 false, queried->getType()->isDependentType(), 2359 (queried->getType()->isInstantiationDependentType() || 2360 (dimension && dimension->isInstantiationDependent())), 2361 queried->getType()->containsUnexpandedParameterPack()), 2362 ATT(att), Value(value), Dimension(dimension), 2363 Loc(loc), RParen(rparen), QueriedType(queried) { } 2364 2365 2366 explicit ArrayTypeTraitExpr(EmptyShell Empty) 2367 : Expr(ArrayTypeTraitExprClass, Empty), ATT(0), Value(false), 2368 QueriedType() { } 2369 2370 virtual ~ArrayTypeTraitExpr() { } 2371 2372 SourceLocation getLocStart() const LLVM_READONLY { return Loc; } 2373 SourceLocation getLocEnd() const LLVM_READONLY { return RParen; } 2374 2375 ArrayTypeTrait getTrait() const { return static_cast<ArrayTypeTrait>(ATT); } 2376 2377 QualType getQueriedType() const { return QueriedType->getType(); } 2378 2379 TypeSourceInfo *getQueriedTypeSourceInfo() const { return QueriedType; } 2380 2381 uint64_t getValue() const { assert(!isTypeDependent()); return Value; } 2382 2383 Expr *getDimensionExpression() const { return Dimension; } 2384 2385 static bool classof(const Stmt *T) { 2386 return T->getStmtClass() == ArrayTypeTraitExprClass; 2387 } 2388 2389 // Iterators 2390 child_range children() { return child_range(); } 2391 2392 friend class ASTStmtReader; 2393}; 2394 2395/// \brief An expression trait intrinsic. 2396/// 2397/// Example: 2398/// @code 2399/// __is_lvalue_expr(std::cout) == true 2400/// __is_lvalue_expr(1) == false 2401/// @endcode 2402class ExpressionTraitExpr : public Expr { 2403 /// \brief The trait. A ExpressionTrait enum in MSVC compat unsigned. 2404 unsigned ET : 31; 2405 /// \brief The value of the type trait. Unspecified if dependent. 2406 bool Value : 1; 2407 2408 /// \brief The location of the type trait keyword. 2409 SourceLocation Loc; 2410 2411 /// \brief The location of the closing paren. 2412 SourceLocation RParen; 2413 2414 /// \brief The expression being queried. 2415 Expr* QueriedExpression; 2416public: 2417 ExpressionTraitExpr(SourceLocation loc, ExpressionTrait et, 2418 Expr *queried, bool value, 2419 SourceLocation rparen, QualType resultType) 2420 : Expr(ExpressionTraitExprClass, resultType, VK_RValue, OK_Ordinary, 2421 false, // Not type-dependent 2422 // Value-dependent if the argument is type-dependent. 2423 queried->isTypeDependent(), 2424 queried->isInstantiationDependent(), 2425 queried->containsUnexpandedParameterPack()), 2426 ET(et), Value(value), Loc(loc), RParen(rparen), 2427 QueriedExpression(queried) { } 2428 2429 explicit ExpressionTraitExpr(EmptyShell Empty) 2430 : Expr(ExpressionTraitExprClass, Empty), ET(0), Value(false), 2431 QueriedExpression() { } 2432 2433 SourceLocation getLocStart() const LLVM_READONLY { return Loc; } 2434 SourceLocation getLocEnd() const LLVM_READONLY { return RParen; } 2435 2436 ExpressionTrait getTrait() const { return static_cast<ExpressionTrait>(ET); } 2437 2438 Expr *getQueriedExpression() const { return QueriedExpression; } 2439 2440 bool getValue() const { return Value; } 2441 2442 static bool classof(const Stmt *T) { 2443 return T->getStmtClass() == ExpressionTraitExprClass; 2444 } 2445 2446 // Iterators 2447 child_range children() { return child_range(); } 2448 2449 friend class ASTStmtReader; 2450}; 2451 2452 2453/// \brief A reference to an overloaded function set, either an 2454/// \c UnresolvedLookupExpr or an \c UnresolvedMemberExpr. 2455class OverloadExpr : public Expr { 2456 /// \brief The common name of these declarations. 2457 DeclarationNameInfo NameInfo; 2458 2459 /// \brief The nested-name-specifier that qualifies the name, if any. 2460 NestedNameSpecifierLoc QualifierLoc; 2461 2462 /// The results. These are undesugared, which is to say, they may 2463 /// include UsingShadowDecls. Access is relative to the naming 2464 /// class. 2465 // FIXME: Allocate this data after the OverloadExpr subclass. 2466 DeclAccessPair *Results; 2467 unsigned NumResults; 2468 2469protected: 2470 /// \brief Whether the name includes info for explicit template 2471 /// keyword and arguments. 2472 bool HasTemplateKWAndArgsInfo; 2473 2474 /// \brief Return the optional template keyword and arguments info. 2475 ASTTemplateKWAndArgsInfo *getTemplateKWAndArgsInfo(); // defined far below. 2476 2477 /// \brief Return the optional template keyword and arguments info. 2478 const ASTTemplateKWAndArgsInfo *getTemplateKWAndArgsInfo() const { 2479 return const_cast<OverloadExpr*>(this)->getTemplateKWAndArgsInfo(); 2480 } 2481 2482 OverloadExpr(StmtClass K, ASTContext &C, 2483 NestedNameSpecifierLoc QualifierLoc, 2484 SourceLocation TemplateKWLoc, 2485 const DeclarationNameInfo &NameInfo, 2486 const TemplateArgumentListInfo *TemplateArgs, 2487 UnresolvedSetIterator Begin, UnresolvedSetIterator End, 2488 bool KnownDependent, 2489 bool KnownInstantiationDependent, 2490 bool KnownContainsUnexpandedParameterPack); 2491 2492 OverloadExpr(StmtClass K, EmptyShell Empty) 2493 : Expr(K, Empty), QualifierLoc(), Results(0), NumResults(0), 2494 HasTemplateKWAndArgsInfo(false) { } 2495 2496 void initializeResults(ASTContext &C, 2497 UnresolvedSetIterator Begin, 2498 UnresolvedSetIterator End); 2499 2500public: 2501 struct FindResult { 2502 OverloadExpr *Expression; 2503 bool IsAddressOfOperand; 2504 bool HasFormOfMemberPointer; 2505 }; 2506 2507 /// Finds the overloaded expression in the given expression of 2508 /// OverloadTy. 2509 /// 2510 /// \return the expression (which must be there) and true if it has 2511 /// the particular form of a member pointer expression 2512 static FindResult find(Expr *E) { 2513 assert(E->getType()->isSpecificBuiltinType(BuiltinType::Overload)); 2514 2515 FindResult Result; 2516 2517 E = E->IgnoreParens(); 2518 if (isa<UnaryOperator>(E)) { 2519 assert(cast<UnaryOperator>(E)->getOpcode() == UO_AddrOf); 2520 E = cast<UnaryOperator>(E)->getSubExpr(); 2521 OverloadExpr *Ovl = cast<OverloadExpr>(E->IgnoreParens()); 2522 2523 Result.HasFormOfMemberPointer = (E == Ovl && Ovl->getQualifier()); 2524 Result.IsAddressOfOperand = true; 2525 Result.Expression = Ovl; 2526 } else { 2527 Result.HasFormOfMemberPointer = false; 2528 Result.IsAddressOfOperand = false; 2529 Result.Expression = cast<OverloadExpr>(E); 2530 } 2531 2532 return Result; 2533 } 2534 2535 /// \brief Gets the naming class of this lookup, if any. 2536 CXXRecordDecl *getNamingClass() const; 2537 2538 typedef UnresolvedSetImpl::iterator decls_iterator; 2539 decls_iterator decls_begin() const { return UnresolvedSetIterator(Results); } 2540 decls_iterator decls_end() const { 2541 return UnresolvedSetIterator(Results + NumResults); 2542 } 2543 2544 /// \brief Gets the number of declarations in the unresolved set. 2545 unsigned getNumDecls() const { return NumResults; } 2546 2547 /// \brief Gets the full name info. 2548 const DeclarationNameInfo &getNameInfo() const { return NameInfo; } 2549 2550 /// \brief Gets the name looked up. 2551 DeclarationName getName() const { return NameInfo.getName(); } 2552 2553 /// \brief Gets the location of the name. 2554 SourceLocation getNameLoc() const { return NameInfo.getLoc(); } 2555 2556 /// \brief Fetches the nested-name qualifier, if one was given. 2557 NestedNameSpecifier *getQualifier() const { 2558 return QualifierLoc.getNestedNameSpecifier(); 2559 } 2560 2561 /// \brief Fetches the nested-name qualifier with source-location 2562 /// information, if one was given. 2563 NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } 2564 2565 /// \brief Retrieve the location of the template keyword preceding 2566 /// this name, if any. 2567 SourceLocation getTemplateKeywordLoc() const { 2568 if (!HasTemplateKWAndArgsInfo) return SourceLocation(); 2569 return getTemplateKWAndArgsInfo()->getTemplateKeywordLoc(); 2570 } 2571 2572 /// \brief Retrieve the location of the left angle bracket starting the 2573 /// explicit template argument list following the name, if any. 2574 SourceLocation getLAngleLoc() const { 2575 if (!HasTemplateKWAndArgsInfo) return SourceLocation(); 2576 return getTemplateKWAndArgsInfo()->LAngleLoc; 2577 } 2578 2579 /// \brief Retrieve the location of the right angle bracket ending the 2580 /// explicit template argument list following the name, if any. 2581 SourceLocation getRAngleLoc() const { 2582 if (!HasTemplateKWAndArgsInfo) return SourceLocation(); 2583 return getTemplateKWAndArgsInfo()->RAngleLoc; 2584 } 2585 2586 /// \brief Determines whether the name was preceded by the template keyword. 2587 bool hasTemplateKeyword() const { return getTemplateKeywordLoc().isValid(); } 2588 2589 /// \brief Determines whether this expression had explicit template arguments. 2590 bool hasExplicitTemplateArgs() const { return getLAngleLoc().isValid(); } 2591 2592 // Note that, inconsistently with the explicit-template-argument AST 2593 // nodes, users are *forbidden* from calling these methods on objects 2594 // without explicit template arguments. 2595 2596 ASTTemplateArgumentListInfo &getExplicitTemplateArgs() { 2597 assert(hasExplicitTemplateArgs()); 2598 return *getTemplateKWAndArgsInfo(); 2599 } 2600 2601 const ASTTemplateArgumentListInfo &getExplicitTemplateArgs() const { 2602 return const_cast<OverloadExpr*>(this)->getExplicitTemplateArgs(); 2603 } 2604 2605 TemplateArgumentLoc const *getTemplateArgs() const { 2606 return getExplicitTemplateArgs().getTemplateArgs(); 2607 } 2608 2609 unsigned getNumTemplateArgs() const { 2610 return getExplicitTemplateArgs().NumTemplateArgs; 2611 } 2612 2613 /// \brief Copies the template arguments into the given structure. 2614 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 2615 getExplicitTemplateArgs().copyInto(List); 2616 } 2617 2618 /// \brief Retrieves the optional explicit template arguments. 2619 /// 2620 /// This points to the same data as getExplicitTemplateArgs(), but 2621 /// returns null if there are no explicit template arguments. 2622 const ASTTemplateArgumentListInfo *getOptionalExplicitTemplateArgs() const { 2623 if (!hasExplicitTemplateArgs()) return 0; 2624 return &getExplicitTemplateArgs(); 2625 } 2626 2627 static bool classof(const Stmt *T) { 2628 return T->getStmtClass() == UnresolvedLookupExprClass || 2629 T->getStmtClass() == UnresolvedMemberExprClass; 2630 } 2631 2632 friend class ASTStmtReader; 2633 friend class ASTStmtWriter; 2634}; 2635 2636/// \brief A reference to a name which we were able to look up during 2637/// parsing but could not resolve to a specific declaration. 2638/// 2639/// This arises in several ways: 2640/// * we might be waiting for argument-dependent lookup 2641/// * the name might resolve to an overloaded function 2642/// and eventually: 2643/// * the lookup might have included a function template 2644/// These never include UnresolvedUsingValueDecls, which are always class 2645/// members and therefore appear only in UnresolvedMemberLookupExprs. 2646class UnresolvedLookupExpr : public OverloadExpr { 2647 /// True if these lookup results should be extended by 2648 /// argument-dependent lookup if this is the operand of a function 2649 /// call. 2650 bool RequiresADL; 2651 2652 /// True if these lookup results are overloaded. This is pretty 2653 /// trivially rederivable if we urgently need to kill this field. 2654 bool Overloaded; 2655 2656 /// The naming class (C++ [class.access.base]p5) of the lookup, if 2657 /// any. This can generally be recalculated from the context chain, 2658 /// but that can be fairly expensive for unqualified lookups. If we 2659 /// want to improve memory use here, this could go in a union 2660 /// against the qualified-lookup bits. 2661 CXXRecordDecl *NamingClass; 2662 2663 UnresolvedLookupExpr(ASTContext &C, 2664 CXXRecordDecl *NamingClass, 2665 NestedNameSpecifierLoc QualifierLoc, 2666 SourceLocation TemplateKWLoc, 2667 const DeclarationNameInfo &NameInfo, 2668 bool RequiresADL, bool Overloaded, 2669 const TemplateArgumentListInfo *TemplateArgs, 2670 UnresolvedSetIterator Begin, UnresolvedSetIterator End) 2671 : OverloadExpr(UnresolvedLookupExprClass, C, QualifierLoc, TemplateKWLoc, 2672 NameInfo, TemplateArgs, Begin, End, false, false, false), 2673 RequiresADL(RequiresADL), 2674 Overloaded(Overloaded), NamingClass(NamingClass) 2675 {} 2676 2677 UnresolvedLookupExpr(EmptyShell Empty) 2678 : OverloadExpr(UnresolvedLookupExprClass, Empty), 2679 RequiresADL(false), Overloaded(false), NamingClass(0) 2680 {} 2681 2682 friend class ASTStmtReader; 2683 2684public: 2685 static UnresolvedLookupExpr *Create(ASTContext &C, 2686 CXXRecordDecl *NamingClass, 2687 NestedNameSpecifierLoc QualifierLoc, 2688 const DeclarationNameInfo &NameInfo, 2689 bool ADL, bool Overloaded, 2690 UnresolvedSetIterator Begin, 2691 UnresolvedSetIterator End) { 2692 return new(C) UnresolvedLookupExpr(C, NamingClass, QualifierLoc, 2693 SourceLocation(), NameInfo, 2694 ADL, Overloaded, 0, Begin, End); 2695 } 2696 2697 static UnresolvedLookupExpr *Create(ASTContext &C, 2698 CXXRecordDecl *NamingClass, 2699 NestedNameSpecifierLoc QualifierLoc, 2700 SourceLocation TemplateKWLoc, 2701 const DeclarationNameInfo &NameInfo, 2702 bool ADL, 2703 const TemplateArgumentListInfo *Args, 2704 UnresolvedSetIterator Begin, 2705 UnresolvedSetIterator End); 2706 2707 static UnresolvedLookupExpr *CreateEmpty(ASTContext &C, 2708 bool HasTemplateKWAndArgsInfo, 2709 unsigned NumTemplateArgs); 2710 2711 /// True if this declaration should be extended by 2712 /// argument-dependent lookup. 2713 bool requiresADL() const { return RequiresADL; } 2714 2715 /// True if this lookup is overloaded. 2716 bool isOverloaded() const { return Overloaded; } 2717 2718 /// Gets the 'naming class' (in the sense of C++0x 2719 /// [class.access.base]p5) of the lookup. This is the scope 2720 /// that was looked in to find these results. 2721 CXXRecordDecl *getNamingClass() const { return NamingClass; } 2722 2723 SourceLocation getLocStart() const LLVM_READONLY { 2724 if (NestedNameSpecifierLoc l = getQualifierLoc()) 2725 return l.getBeginLoc(); 2726 return getNameInfo().getLocStart(); 2727 } 2728 SourceLocation getLocEnd() const LLVM_READONLY { 2729 if (hasExplicitTemplateArgs()) 2730 return getRAngleLoc(); 2731 return getNameInfo().getLocEnd(); 2732 } 2733 2734 child_range children() { return child_range(); } 2735 2736 static bool classof(const Stmt *T) { 2737 return T->getStmtClass() == UnresolvedLookupExprClass; 2738 } 2739}; 2740 2741/// \brief A qualified reference to a name whose declaration cannot 2742/// yet be resolved. 2743/// 2744/// DependentScopeDeclRefExpr is similar to DeclRefExpr in that 2745/// it expresses a reference to a declaration such as 2746/// X<T>::value. The difference, however, is that an 2747/// DependentScopeDeclRefExpr node is used only within C++ templates when 2748/// the qualification (e.g., X<T>::) refers to a dependent type. In 2749/// this case, X<T>::value cannot resolve to a declaration because the 2750/// declaration will differ from on instantiation of X<T> to the 2751/// next. Therefore, DependentScopeDeclRefExpr keeps track of the 2752/// qualifier (X<T>::) and the name of the entity being referenced 2753/// ("value"). Such expressions will instantiate to a DeclRefExpr once the 2754/// declaration can be found. 2755class DependentScopeDeclRefExpr : public Expr { 2756 /// \brief The nested-name-specifier that qualifies this unresolved 2757 /// declaration name. 2758 NestedNameSpecifierLoc QualifierLoc; 2759 2760 /// The name of the entity we will be referencing. 2761 DeclarationNameInfo NameInfo; 2762 2763 /// \brief Whether the name includes info for explicit template 2764 /// keyword and arguments. 2765 bool HasTemplateKWAndArgsInfo; 2766 2767 /// \brief Return the optional template keyword and arguments info. 2768 ASTTemplateKWAndArgsInfo *getTemplateKWAndArgsInfo() { 2769 if (!HasTemplateKWAndArgsInfo) return 0; 2770 return reinterpret_cast<ASTTemplateKWAndArgsInfo*>(this + 1); 2771 } 2772 /// \brief Return the optional template keyword and arguments info. 2773 const ASTTemplateKWAndArgsInfo *getTemplateKWAndArgsInfo() const { 2774 return const_cast<DependentScopeDeclRefExpr*>(this) 2775 ->getTemplateKWAndArgsInfo(); 2776 } 2777 2778 DependentScopeDeclRefExpr(QualType T, 2779 NestedNameSpecifierLoc QualifierLoc, 2780 SourceLocation TemplateKWLoc, 2781 const DeclarationNameInfo &NameInfo, 2782 const TemplateArgumentListInfo *Args); 2783 2784public: 2785 static DependentScopeDeclRefExpr *Create(ASTContext &C, 2786 NestedNameSpecifierLoc QualifierLoc, 2787 SourceLocation TemplateKWLoc, 2788 const DeclarationNameInfo &NameInfo, 2789 const TemplateArgumentListInfo *TemplateArgs); 2790 2791 static DependentScopeDeclRefExpr *CreateEmpty(ASTContext &C, 2792 bool HasTemplateKWAndArgsInfo, 2793 unsigned NumTemplateArgs); 2794 2795 /// \brief Retrieve the name that this expression refers to. 2796 const DeclarationNameInfo &getNameInfo() const { return NameInfo; } 2797 2798 /// \brief Retrieve the name that this expression refers to. 2799 DeclarationName getDeclName() const { return NameInfo.getName(); } 2800 2801 /// \brief Retrieve the location of the name within the expression. 2802 SourceLocation getLocation() const { return NameInfo.getLoc(); } 2803 2804 /// \brief Retrieve the nested-name-specifier that qualifies the 2805 /// name, with source location information. 2806 NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } 2807 2808 2809 /// \brief Retrieve the nested-name-specifier that qualifies this 2810 /// declaration. 2811 NestedNameSpecifier *getQualifier() const { 2812 return QualifierLoc.getNestedNameSpecifier(); 2813 } 2814 2815 /// \brief Retrieve the location of the template keyword preceding 2816 /// this name, if any. 2817 SourceLocation getTemplateKeywordLoc() const { 2818 if (!HasTemplateKWAndArgsInfo) return SourceLocation(); 2819 return getTemplateKWAndArgsInfo()->getTemplateKeywordLoc(); 2820 } 2821 2822 /// \brief Retrieve the location of the left angle bracket starting the 2823 /// explicit template argument list following the name, if any. 2824 SourceLocation getLAngleLoc() const { 2825 if (!HasTemplateKWAndArgsInfo) return SourceLocation(); 2826 return getTemplateKWAndArgsInfo()->LAngleLoc; 2827 } 2828 2829 /// \brief Retrieve the location of the right angle bracket ending the 2830 /// explicit template argument list following the name, if any. 2831 SourceLocation getRAngleLoc() const { 2832 if (!HasTemplateKWAndArgsInfo) return SourceLocation(); 2833 return getTemplateKWAndArgsInfo()->RAngleLoc; 2834 } 2835 2836 /// Determines whether the name was preceded by the template keyword. 2837 bool hasTemplateKeyword() const { return getTemplateKeywordLoc().isValid(); } 2838 2839 /// Determines whether this lookup had explicit template arguments. 2840 bool hasExplicitTemplateArgs() const { return getLAngleLoc().isValid(); } 2841 2842 // Note that, inconsistently with the explicit-template-argument AST 2843 // nodes, users are *forbidden* from calling these methods on objects 2844 // without explicit template arguments. 2845 2846 ASTTemplateArgumentListInfo &getExplicitTemplateArgs() { 2847 assert(hasExplicitTemplateArgs()); 2848 return *reinterpret_cast<ASTTemplateArgumentListInfo*>(this + 1); 2849 } 2850 2851 /// Gets a reference to the explicit template argument list. 2852 const ASTTemplateArgumentListInfo &getExplicitTemplateArgs() const { 2853 assert(hasExplicitTemplateArgs()); 2854 return *reinterpret_cast<const ASTTemplateArgumentListInfo*>(this + 1); 2855 } 2856 2857 /// \brief Retrieves the optional explicit template arguments. 2858 /// This points to the same data as getExplicitTemplateArgs(), but 2859 /// returns null if there are no explicit template arguments. 2860 const ASTTemplateArgumentListInfo *getOptionalExplicitTemplateArgs() const { 2861 if (!hasExplicitTemplateArgs()) return 0; 2862 return &getExplicitTemplateArgs(); 2863 } 2864 2865 /// \brief Copies the template arguments (if present) into the given 2866 /// structure. 2867 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 2868 getExplicitTemplateArgs().copyInto(List); 2869 } 2870 2871 TemplateArgumentLoc const *getTemplateArgs() const { 2872 return getExplicitTemplateArgs().getTemplateArgs(); 2873 } 2874 2875 unsigned getNumTemplateArgs() const { 2876 return getExplicitTemplateArgs().NumTemplateArgs; 2877 } 2878 2879 SourceLocation getLocStart() const LLVM_READONLY { 2880 return QualifierLoc.getBeginLoc(); 2881 } 2882 SourceLocation getLocEnd() const LLVM_READONLY { 2883 if (hasExplicitTemplateArgs()) 2884 return getRAngleLoc(); 2885 return getLocation(); 2886 } 2887 2888 static bool classof(const Stmt *T) { 2889 return T->getStmtClass() == DependentScopeDeclRefExprClass; 2890 } 2891 2892 child_range children() { return child_range(); } 2893 2894 friend class ASTStmtReader; 2895 friend class ASTStmtWriter; 2896}; 2897 2898/// Represents an expression --- generally a full-expression --- which 2899/// introduces cleanups to be run at the end of the sub-expression's 2900/// evaluation. The most common source of expression-introduced 2901/// cleanups is temporary objects in C++, but several other kinds of 2902/// expressions can create cleanups, including basically every 2903/// call in ARC that returns an Objective-C pointer. 2904/// 2905/// This expression also tracks whether the sub-expression contains a 2906/// potentially-evaluated block literal. The lifetime of a block 2907/// literal is the extent of the enclosing scope. 2908class ExprWithCleanups : public Expr { 2909public: 2910 /// The type of objects that are kept in the cleanup. 2911 /// It's useful to remember the set of blocks; we could also 2912 /// remember the set of temporaries, but there's currently 2913 /// no need. 2914 typedef BlockDecl *CleanupObject; 2915 2916private: 2917 Stmt *SubExpr; 2918 2919 ExprWithCleanups(EmptyShell, unsigned NumObjects); 2920 ExprWithCleanups(Expr *SubExpr, ArrayRef<CleanupObject> Objects); 2921 2922 CleanupObject *getObjectsBuffer() { 2923 return reinterpret_cast<CleanupObject*>(this + 1); 2924 } 2925 const CleanupObject *getObjectsBuffer() const { 2926 return reinterpret_cast<const CleanupObject*>(this + 1); 2927 } 2928 friend class ASTStmtReader; 2929 2930public: 2931 static ExprWithCleanups *Create(ASTContext &C, EmptyShell empty, 2932 unsigned numObjects); 2933 2934 static ExprWithCleanups *Create(ASTContext &C, Expr *subexpr, 2935 ArrayRef<CleanupObject> objects); 2936 2937 ArrayRef<CleanupObject> getObjects() const { 2938 return ArrayRef<CleanupObject>(getObjectsBuffer(), getNumObjects()); 2939 } 2940 2941 unsigned getNumObjects() const { return ExprWithCleanupsBits.NumObjects; } 2942 2943 CleanupObject getObject(unsigned i) const { 2944 assert(i < getNumObjects() && "Index out of range"); 2945 return getObjects()[i]; 2946 } 2947 2948 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 2949 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 2950 2951 /// setSubExpr - As with any mutator of the AST, be very careful 2952 /// when modifying an existing AST to preserve its invariants. 2953 void setSubExpr(Expr *E) { SubExpr = E; } 2954 2955 SourceLocation getLocStart() const LLVM_READONLY { 2956 return SubExpr->getLocStart(); 2957 } 2958 SourceLocation getLocEnd() const LLVM_READONLY { return SubExpr->getLocEnd();} 2959 2960 // Implement isa/cast/dyncast/etc. 2961 static bool classof(const Stmt *T) { 2962 return T->getStmtClass() == ExprWithCleanupsClass; 2963 } 2964 2965 // Iterators 2966 child_range children() { return child_range(&SubExpr, &SubExpr + 1); } 2967}; 2968 2969/// \brief Describes an explicit type conversion that uses functional 2970/// notion but could not be resolved because one or more arguments are 2971/// type-dependent. 2972/// 2973/// The explicit type conversions expressed by 2974/// CXXUnresolvedConstructExpr have the form <tt>T(a1, a2, ..., aN)</tt>, 2975/// where \c T is some type and \c a1, \c a2, ..., \c aN are values, and 2976/// either \c T is a dependent type or one or more of the <tt>a</tt>'s is 2977/// type-dependent. For example, this would occur in a template such 2978/// as: 2979/// 2980/// \code 2981/// template<typename T, typename A1> 2982/// inline T make_a(const A1& a1) { 2983/// return T(a1); 2984/// } 2985/// \endcode 2986/// 2987/// When the returned expression is instantiated, it may resolve to a 2988/// constructor call, conversion function call, or some kind of type 2989/// conversion. 2990class CXXUnresolvedConstructExpr : public Expr { 2991 /// \brief The type being constructed. 2992 TypeSourceInfo *Type; 2993 2994 /// \brief The location of the left parentheses ('('). 2995 SourceLocation LParenLoc; 2996 2997 /// \brief The location of the right parentheses (')'). 2998 SourceLocation RParenLoc; 2999 3000 /// \brief The number of arguments used to construct the type. 3001 unsigned NumArgs; 3002 3003 CXXUnresolvedConstructExpr(TypeSourceInfo *Type, 3004 SourceLocation LParenLoc, 3005 ArrayRef<Expr*> Args, 3006 SourceLocation RParenLoc); 3007 3008 CXXUnresolvedConstructExpr(EmptyShell Empty, unsigned NumArgs) 3009 : Expr(CXXUnresolvedConstructExprClass, Empty), Type(), NumArgs(NumArgs) { } 3010 3011 friend class ASTStmtReader; 3012 3013public: 3014 static CXXUnresolvedConstructExpr *Create(ASTContext &C, 3015 TypeSourceInfo *Type, 3016 SourceLocation LParenLoc, 3017 ArrayRef<Expr*> Args, 3018 SourceLocation RParenLoc); 3019 3020 static CXXUnresolvedConstructExpr *CreateEmpty(ASTContext &C, 3021 unsigned NumArgs); 3022 3023 /// \brief Retrieve the type that is being constructed, as specified 3024 /// in the source code. 3025 QualType getTypeAsWritten() const { return Type->getType(); } 3026 3027 /// \brief Retrieve the type source information for the type being 3028 /// constructed. 3029 TypeSourceInfo *getTypeSourceInfo() const { return Type; } 3030 3031 /// \brief Retrieve the location of the left parentheses ('(') that 3032 /// precedes the argument list. 3033 SourceLocation getLParenLoc() const { return LParenLoc; } 3034 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 3035 3036 /// \brief Retrieve the location of the right parentheses (')') that 3037 /// follows the argument list. 3038 SourceLocation getRParenLoc() const { return RParenLoc; } 3039 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 3040 3041 /// \brief Retrieve the number of arguments. 3042 unsigned arg_size() const { return NumArgs; } 3043 3044 typedef Expr** arg_iterator; 3045 arg_iterator arg_begin() { return reinterpret_cast<Expr**>(this + 1); } 3046 arg_iterator arg_end() { return arg_begin() + NumArgs; } 3047 3048 typedef const Expr* const * const_arg_iterator; 3049 const_arg_iterator arg_begin() const { 3050 return reinterpret_cast<const Expr* const *>(this + 1); 3051 } 3052 const_arg_iterator arg_end() const { 3053 return arg_begin() + NumArgs; 3054 } 3055 3056 Expr *getArg(unsigned I) { 3057 assert(I < NumArgs && "Argument index out-of-range"); 3058 return *(arg_begin() + I); 3059 } 3060 3061 const Expr *getArg(unsigned I) const { 3062 assert(I < NumArgs && "Argument index out-of-range"); 3063 return *(arg_begin() + I); 3064 } 3065 3066 void setArg(unsigned I, Expr *E) { 3067 assert(I < NumArgs && "Argument index out-of-range"); 3068 *(arg_begin() + I) = E; 3069 } 3070 3071 SourceLocation getLocStart() const LLVM_READONLY; 3072 SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; } 3073 3074 static bool classof(const Stmt *T) { 3075 return T->getStmtClass() == CXXUnresolvedConstructExprClass; 3076 } 3077 3078 // Iterators 3079 child_range children() { 3080 Stmt **begin = reinterpret_cast<Stmt**>(this+1); 3081 return child_range(begin, begin + NumArgs); 3082 } 3083}; 3084 3085/// \brief Represents a C++ member access expression where the actual 3086/// member referenced could not be resolved because the base 3087/// expression or the member name was dependent. 3088/// 3089/// Like UnresolvedMemberExprs, these can be either implicit or 3090/// explicit accesses. It is only possible to get one of these with 3091/// an implicit access if a qualifier is provided. 3092class CXXDependentScopeMemberExpr : public Expr { 3093 /// \brief The expression for the base pointer or class reference, 3094 /// e.g., the \c x in x.f. Can be null in implicit accesses. 3095 Stmt *Base; 3096 3097 /// \brief The type of the base expression. Never null, even for 3098 /// implicit accesses. 3099 QualType BaseType; 3100 3101 /// \brief Whether this member expression used the '->' operator or 3102 /// the '.' operator. 3103 bool IsArrow : 1; 3104 3105 /// \brief Whether this member expression has info for explicit template 3106 /// keyword and arguments. 3107 bool HasTemplateKWAndArgsInfo : 1; 3108 3109 /// \brief The location of the '->' or '.' operator. 3110 SourceLocation OperatorLoc; 3111 3112 /// \brief The nested-name-specifier that precedes the member name, if any. 3113 NestedNameSpecifierLoc QualifierLoc; 3114 3115 /// \brief In a qualified member access expression such as t->Base::f, this 3116 /// member stores the resolves of name lookup in the context of the member 3117 /// access expression, to be used at instantiation time. 3118 /// 3119 /// FIXME: This member, along with the QualifierLoc, could 3120 /// be stuck into a structure that is optionally allocated at the end of 3121 /// the CXXDependentScopeMemberExpr, to save space in the common case. 3122 NamedDecl *FirstQualifierFoundInScope; 3123 3124 /// \brief The member to which this member expression refers, which 3125 /// can be name, overloaded operator, or destructor. 3126 /// FIXME: could also be a template-id 3127 DeclarationNameInfo MemberNameInfo; 3128 3129 /// \brief Return the optional template keyword and arguments info. 3130 ASTTemplateKWAndArgsInfo *getTemplateKWAndArgsInfo() { 3131 if (!HasTemplateKWAndArgsInfo) return 0; 3132 return reinterpret_cast<ASTTemplateKWAndArgsInfo*>(this + 1); 3133 } 3134 /// \brief Return the optional template keyword and arguments info. 3135 const ASTTemplateKWAndArgsInfo *getTemplateKWAndArgsInfo() const { 3136 return const_cast<CXXDependentScopeMemberExpr*>(this) 3137 ->getTemplateKWAndArgsInfo(); 3138 } 3139 3140 CXXDependentScopeMemberExpr(ASTContext &C, 3141 Expr *Base, QualType BaseType, bool IsArrow, 3142 SourceLocation OperatorLoc, 3143 NestedNameSpecifierLoc QualifierLoc, 3144 SourceLocation TemplateKWLoc, 3145 NamedDecl *FirstQualifierFoundInScope, 3146 DeclarationNameInfo MemberNameInfo, 3147 const TemplateArgumentListInfo *TemplateArgs); 3148 3149public: 3150 CXXDependentScopeMemberExpr(ASTContext &C, 3151 Expr *Base, QualType BaseType, 3152 bool IsArrow, 3153 SourceLocation OperatorLoc, 3154 NestedNameSpecifierLoc QualifierLoc, 3155 NamedDecl *FirstQualifierFoundInScope, 3156 DeclarationNameInfo MemberNameInfo); 3157 3158 static CXXDependentScopeMemberExpr * 3159 Create(ASTContext &C, 3160 Expr *Base, QualType BaseType, bool IsArrow, 3161 SourceLocation OperatorLoc, 3162 NestedNameSpecifierLoc QualifierLoc, 3163 SourceLocation TemplateKWLoc, 3164 NamedDecl *FirstQualifierFoundInScope, 3165 DeclarationNameInfo MemberNameInfo, 3166 const TemplateArgumentListInfo *TemplateArgs); 3167 3168 static CXXDependentScopeMemberExpr * 3169 CreateEmpty(ASTContext &C, bool HasTemplateKWAndArgsInfo, 3170 unsigned NumTemplateArgs); 3171 3172 /// \brief True if this is an implicit access, i.e. one in which the 3173 /// member being accessed was not written in the source. The source 3174 /// location of the operator is invalid in this case. 3175 bool isImplicitAccess() const; 3176 3177 /// \brief Retrieve the base object of this member expressions, 3178 /// e.g., the \c x in \c x.m. 3179 Expr *getBase() const { 3180 assert(!isImplicitAccess()); 3181 return cast<Expr>(Base); 3182 } 3183 3184 QualType getBaseType() const { return BaseType; } 3185 3186 /// \brief Determine whether this member expression used the '->' 3187 /// operator; otherwise, it used the '.' operator. 3188 bool isArrow() const { return IsArrow; } 3189 3190 /// \brief Retrieve the location of the '->' or '.' operator. 3191 SourceLocation getOperatorLoc() const { return OperatorLoc; } 3192 3193 /// \brief Retrieve the nested-name-specifier that qualifies the member 3194 /// name. 3195 NestedNameSpecifier *getQualifier() const { 3196 return QualifierLoc.getNestedNameSpecifier(); 3197 } 3198 3199 /// \brief Retrieve the nested-name-specifier that qualifies the member 3200 /// name, with source location information. 3201 NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } 3202 3203 3204 /// \brief Retrieve the first part of the nested-name-specifier that was 3205 /// found in the scope of the member access expression when the member access 3206 /// was initially parsed. 3207 /// 3208 /// This function only returns a useful result when member access expression 3209 /// uses a qualified member name, e.g., "x.Base::f". Here, the declaration 3210 /// returned by this function describes what was found by unqualified name 3211 /// lookup for the identifier "Base" within the scope of the member access 3212 /// expression itself. At template instantiation time, this information is 3213 /// combined with the results of name lookup into the type of the object 3214 /// expression itself (the class type of x). 3215 NamedDecl *getFirstQualifierFoundInScope() const { 3216 return FirstQualifierFoundInScope; 3217 } 3218 3219 /// \brief Retrieve the name of the member that this expression 3220 /// refers to. 3221 const DeclarationNameInfo &getMemberNameInfo() const { 3222 return MemberNameInfo; 3223 } 3224 3225 /// \brief Retrieve the name of the member that this expression 3226 /// refers to. 3227 DeclarationName getMember() const { return MemberNameInfo.getName(); } 3228 3229 // \brief Retrieve the location of the name of the member that this 3230 // expression refers to. 3231 SourceLocation getMemberLoc() const { return MemberNameInfo.getLoc(); } 3232 3233 /// \brief Retrieve the location of the template keyword preceding the 3234 /// member name, if any. 3235 SourceLocation getTemplateKeywordLoc() const { 3236 if (!HasTemplateKWAndArgsInfo) return SourceLocation(); 3237 return getTemplateKWAndArgsInfo()->getTemplateKeywordLoc(); 3238 } 3239 3240 /// \brief Retrieve the location of the left angle bracket starting the 3241 /// explicit template argument list following the member name, if any. 3242 SourceLocation getLAngleLoc() const { 3243 if (!HasTemplateKWAndArgsInfo) return SourceLocation(); 3244 return getTemplateKWAndArgsInfo()->LAngleLoc; 3245 } 3246 3247 /// \brief Retrieve the location of the right angle bracket ending the 3248 /// explicit template argument list following the member name, if any. 3249 SourceLocation getRAngleLoc() const { 3250 if (!HasTemplateKWAndArgsInfo) return SourceLocation(); 3251 return getTemplateKWAndArgsInfo()->RAngleLoc; 3252 } 3253 3254 /// Determines whether the member name was preceded by the template keyword. 3255 bool hasTemplateKeyword() const { return getTemplateKeywordLoc().isValid(); } 3256 3257 /// \brief Determines whether this member expression actually had a C++ 3258 /// template argument list explicitly specified, e.g., x.f<int>. 3259 bool hasExplicitTemplateArgs() const { return getLAngleLoc().isValid(); } 3260 3261 /// \brief Retrieve the explicit template argument list that followed the 3262 /// member template name, if any. 3263 ASTTemplateArgumentListInfo &getExplicitTemplateArgs() { 3264 assert(hasExplicitTemplateArgs()); 3265 return *reinterpret_cast<ASTTemplateArgumentListInfo *>(this + 1); 3266 } 3267 3268 /// \brief Retrieve the explicit template argument list that followed the 3269 /// member template name, if any. 3270 const ASTTemplateArgumentListInfo &getExplicitTemplateArgs() const { 3271 return const_cast<CXXDependentScopeMemberExpr *>(this) 3272 ->getExplicitTemplateArgs(); 3273 } 3274 3275 /// \brief Retrieves the optional explicit template arguments. 3276 /// This points to the same data as getExplicitTemplateArgs(), but 3277 /// returns null if there are no explicit template arguments. 3278 const ASTTemplateArgumentListInfo *getOptionalExplicitTemplateArgs() const { 3279 if (!hasExplicitTemplateArgs()) return 0; 3280 return &getExplicitTemplateArgs(); 3281 } 3282 3283 /// \brief Copies the template arguments (if present) into the given 3284 /// structure. 3285 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 3286 getExplicitTemplateArgs().copyInto(List); 3287 } 3288 3289 /// \brief Initializes the template arguments using the given structure. 3290 void initializeTemplateArgumentsFrom(const TemplateArgumentListInfo &List) { 3291 getExplicitTemplateArgs().initializeFrom(List); 3292 } 3293 3294 /// \brief Retrieve the template arguments provided as part of this 3295 /// template-id. 3296 const TemplateArgumentLoc *getTemplateArgs() const { 3297 return getExplicitTemplateArgs().getTemplateArgs(); 3298 } 3299 3300 /// \brief Retrieve the number of template arguments provided as part of this 3301 /// template-id. 3302 unsigned getNumTemplateArgs() const { 3303 return getExplicitTemplateArgs().NumTemplateArgs; 3304 } 3305 3306 SourceLocation getLocStart() const LLVM_READONLY { 3307 if (!isImplicitAccess()) 3308 return Base->getLocStart(); 3309 if (getQualifier()) 3310 return getQualifierLoc().getBeginLoc(); 3311 return MemberNameInfo.getBeginLoc(); 3312 3313 } 3314 SourceLocation getLocEnd() const LLVM_READONLY { 3315 if (hasExplicitTemplateArgs()) 3316 return getRAngleLoc(); 3317 return MemberNameInfo.getEndLoc(); 3318 } 3319 3320 static bool classof(const Stmt *T) { 3321 return T->getStmtClass() == CXXDependentScopeMemberExprClass; 3322 } 3323 3324 // Iterators 3325 child_range children() { 3326 if (isImplicitAccess()) return child_range(); 3327 return child_range(&Base, &Base + 1); 3328 } 3329 3330 friend class ASTStmtReader; 3331 friend class ASTStmtWriter; 3332}; 3333 3334/// \brief Represents a C++ member access expression for which lookup 3335/// produced a set of overloaded functions. 3336/// 3337/// The member access may be explicit or implicit: 3338/// struct A { 3339/// int a, b; 3340/// int explicitAccess() { return this->a + this->A::b; } 3341/// int implicitAccess() { return a + A::b; } 3342/// }; 3343/// 3344/// In the final AST, an explicit access always becomes a MemberExpr. 3345/// An implicit access may become either a MemberExpr or a 3346/// DeclRefExpr, depending on whether the member is static. 3347class UnresolvedMemberExpr : public OverloadExpr { 3348 /// \brief Whether this member expression used the '->' operator or 3349 /// the '.' operator. 3350 bool IsArrow : 1; 3351 3352 /// \brief Whether the lookup results contain an unresolved using 3353 /// declaration. 3354 bool HasUnresolvedUsing : 1; 3355 3356 /// \brief The expression for the base pointer or class reference, 3357 /// e.g., the \c x in x.f. This can be null if this is an 'unbased' 3358 /// member expression 3359 Stmt *Base; 3360 3361 /// \brief The type of the base expression; never null. 3362 QualType BaseType; 3363 3364 /// \brief The location of the '->' or '.' operator. 3365 SourceLocation OperatorLoc; 3366 3367 UnresolvedMemberExpr(ASTContext &C, bool HasUnresolvedUsing, 3368 Expr *Base, QualType BaseType, bool IsArrow, 3369 SourceLocation OperatorLoc, 3370 NestedNameSpecifierLoc QualifierLoc, 3371 SourceLocation TemplateKWLoc, 3372 const DeclarationNameInfo &MemberNameInfo, 3373 const TemplateArgumentListInfo *TemplateArgs, 3374 UnresolvedSetIterator Begin, UnresolvedSetIterator End); 3375 3376 UnresolvedMemberExpr(EmptyShell Empty) 3377 : OverloadExpr(UnresolvedMemberExprClass, Empty), IsArrow(false), 3378 HasUnresolvedUsing(false), Base(0) { } 3379 3380 friend class ASTStmtReader; 3381 3382public: 3383 static UnresolvedMemberExpr * 3384 Create(ASTContext &C, bool HasUnresolvedUsing, 3385 Expr *Base, QualType BaseType, bool IsArrow, 3386 SourceLocation OperatorLoc, 3387 NestedNameSpecifierLoc QualifierLoc, 3388 SourceLocation TemplateKWLoc, 3389 const DeclarationNameInfo &MemberNameInfo, 3390 const TemplateArgumentListInfo *TemplateArgs, 3391 UnresolvedSetIterator Begin, UnresolvedSetIterator End); 3392 3393 static UnresolvedMemberExpr * 3394 CreateEmpty(ASTContext &C, bool HasTemplateKWAndArgsInfo, 3395 unsigned NumTemplateArgs); 3396 3397 /// \brief True if this is an implicit access, i.e. one in which the 3398 /// member being accessed was not written in the source. The source 3399 /// location of the operator is invalid in this case. 3400 bool isImplicitAccess() const; 3401 3402 /// \brief Retrieve the base object of this member expressions, 3403 /// e.g., the \c x in \c x.m. 3404 Expr *getBase() { 3405 assert(!isImplicitAccess()); 3406 return cast<Expr>(Base); 3407 } 3408 const Expr *getBase() const { 3409 assert(!isImplicitAccess()); 3410 return cast<Expr>(Base); 3411 } 3412 3413 QualType getBaseType() const { return BaseType; } 3414 3415 /// \brief Determine whether the lookup results contain an unresolved using 3416 /// declaration. 3417 bool hasUnresolvedUsing() const { return HasUnresolvedUsing; } 3418 3419 /// \brief Determine whether this member expression used the '->' 3420 /// operator; otherwise, it used the '.' operator. 3421 bool isArrow() const { return IsArrow; } 3422 3423 /// \brief Retrieve the location of the '->' or '.' operator. 3424 SourceLocation getOperatorLoc() const { return OperatorLoc; } 3425 3426 /// \brief Retrieves the naming class of this lookup. 3427 CXXRecordDecl *getNamingClass() const; 3428 3429 /// \brief Retrieve the full name info for the member that this expression 3430 /// refers to. 3431 const DeclarationNameInfo &getMemberNameInfo() const { return getNameInfo(); } 3432 3433 /// \brief Retrieve the name of the member that this expression 3434 /// refers to. 3435 DeclarationName getMemberName() const { return getName(); } 3436 3437 // \brief Retrieve the location of the name of the member that this 3438 // expression refers to. 3439 SourceLocation getMemberLoc() const { return getNameLoc(); } 3440 3441 // \brief Return the preferred location (the member name) for the arrow when 3442 // diagnosing a problem with this expression. 3443 SourceLocation getExprLoc() const LLVM_READONLY { return getMemberLoc(); } 3444 3445 SourceLocation getLocStart() const LLVM_READONLY { 3446 if (!isImplicitAccess()) 3447 return Base->getLocStart(); 3448 if (NestedNameSpecifierLoc l = getQualifierLoc()) 3449 return l.getBeginLoc(); 3450 return getMemberNameInfo().getLocStart(); 3451 } 3452 SourceLocation getLocEnd() const LLVM_READONLY { 3453 if (hasExplicitTemplateArgs()) 3454 return getRAngleLoc(); 3455 return getMemberNameInfo().getLocEnd(); 3456 } 3457 3458 static bool classof(const Stmt *T) { 3459 return T->getStmtClass() == UnresolvedMemberExprClass; 3460 } 3461 3462 // Iterators 3463 child_range children() { 3464 if (isImplicitAccess()) return child_range(); 3465 return child_range(&Base, &Base + 1); 3466 } 3467}; 3468 3469/// \brief Represents a C++0x noexcept expression (C++ [expr.unary.noexcept]). 3470/// 3471/// The noexcept expression tests whether a given expression might throw. Its 3472/// result is a boolean constant. 3473class CXXNoexceptExpr : public Expr { 3474 bool Value : 1; 3475 Stmt *Operand; 3476 SourceRange Range; 3477 3478 friend class ASTStmtReader; 3479 3480public: 3481 CXXNoexceptExpr(QualType Ty, Expr *Operand, CanThrowResult Val, 3482 SourceLocation Keyword, SourceLocation RParen) 3483 : Expr(CXXNoexceptExprClass, Ty, VK_RValue, OK_Ordinary, 3484 /*TypeDependent*/false, 3485 /*ValueDependent*/Val == CT_Dependent, 3486 Val == CT_Dependent || Operand->isInstantiationDependent(), 3487 Operand->containsUnexpandedParameterPack()), 3488 Value(Val == CT_Cannot), Operand(Operand), Range(Keyword, RParen) 3489 { } 3490 3491 CXXNoexceptExpr(EmptyShell Empty) 3492 : Expr(CXXNoexceptExprClass, Empty) 3493 { } 3494 3495 Expr *getOperand() const { return static_cast<Expr*>(Operand); } 3496 3497 SourceLocation getLocStart() const LLVM_READONLY { return Range.getBegin(); } 3498 SourceLocation getLocEnd() const LLVM_READONLY { return Range.getEnd(); } 3499 SourceRange getSourceRange() const LLVM_READONLY { return Range; } 3500 3501 bool getValue() const { return Value; } 3502 3503 static bool classof(const Stmt *T) { 3504 return T->getStmtClass() == CXXNoexceptExprClass; 3505 } 3506 3507 // Iterators 3508 child_range children() { return child_range(&Operand, &Operand + 1); } 3509}; 3510 3511/// \brief Represents a C++0x pack expansion that produces a sequence of 3512/// expressions. 3513/// 3514/// A pack expansion expression contains a pattern (which itself is an 3515/// expression) followed by an ellipsis. For example: 3516/// 3517/// \code 3518/// template<typename F, typename ...Types> 3519/// void forward(F f, Types &&...args) { 3520/// f(static_cast<Types&&>(args)...); 3521/// } 3522/// \endcode 3523/// 3524/// Here, the argument to the function object \c f is a pack expansion whose 3525/// pattern is \c static_cast<Types&&>(args). When the \c forward function 3526/// template is instantiated, the pack expansion will instantiate to zero or 3527/// or more function arguments to the function object \c f. 3528class PackExpansionExpr : public Expr { 3529 SourceLocation EllipsisLoc; 3530 3531 /// \brief The number of expansions that will be produced by this pack 3532 /// expansion expression, if known. 3533 /// 3534 /// When zero, the number of expansions is not known. Otherwise, this value 3535 /// is the number of expansions + 1. 3536 unsigned NumExpansions; 3537 3538 Stmt *Pattern; 3539 3540 friend class ASTStmtReader; 3541 friend class ASTStmtWriter; 3542 3543public: 3544 PackExpansionExpr(QualType T, Expr *Pattern, SourceLocation EllipsisLoc, 3545 Optional<unsigned> NumExpansions) 3546 : Expr(PackExpansionExprClass, T, Pattern->getValueKind(), 3547 Pattern->getObjectKind(), /*TypeDependent=*/true, 3548 /*ValueDependent=*/true, /*InstantiationDependent=*/true, 3549 /*ContainsUnexpandedParameterPack=*/false), 3550 EllipsisLoc(EllipsisLoc), 3551 NumExpansions(NumExpansions? *NumExpansions + 1 : 0), 3552 Pattern(Pattern) { } 3553 3554 PackExpansionExpr(EmptyShell Empty) : Expr(PackExpansionExprClass, Empty) { } 3555 3556 /// \brief Retrieve the pattern of the pack expansion. 3557 Expr *getPattern() { return reinterpret_cast<Expr *>(Pattern); } 3558 3559 /// \brief Retrieve the pattern of the pack expansion. 3560 const Expr *getPattern() const { return reinterpret_cast<Expr *>(Pattern); } 3561 3562 /// \brief Retrieve the location of the ellipsis that describes this pack 3563 /// expansion. 3564 SourceLocation getEllipsisLoc() const { return EllipsisLoc; } 3565 3566 /// \brief Determine the number of expansions that will be produced when 3567 /// this pack expansion is instantiated, if already known. 3568 Optional<unsigned> getNumExpansions() const { 3569 if (NumExpansions) 3570 return NumExpansions - 1; 3571 3572 return None; 3573 } 3574 3575 SourceLocation getLocStart() const LLVM_READONLY { 3576 return Pattern->getLocStart(); 3577 } 3578 SourceLocation getLocEnd() const LLVM_READONLY { return EllipsisLoc; } 3579 3580 static bool classof(const Stmt *T) { 3581 return T->getStmtClass() == PackExpansionExprClass; 3582 } 3583 3584 // Iterators 3585 child_range children() { 3586 return child_range(&Pattern, &Pattern + 1); 3587 } 3588}; 3589 3590inline ASTTemplateKWAndArgsInfo *OverloadExpr::getTemplateKWAndArgsInfo() { 3591 if (!HasTemplateKWAndArgsInfo) return 0; 3592 if (isa<UnresolvedLookupExpr>(this)) 3593 return reinterpret_cast<ASTTemplateKWAndArgsInfo*> 3594 (cast<UnresolvedLookupExpr>(this) + 1); 3595 else 3596 return reinterpret_cast<ASTTemplateKWAndArgsInfo*> 3597 (cast<UnresolvedMemberExpr>(this) + 1); 3598} 3599 3600/// \brief Represents an expression that computes the length of a parameter 3601/// pack. 3602/// 3603/// \code 3604/// template<typename ...Types> 3605/// struct count { 3606/// static const unsigned value = sizeof...(Types); 3607/// }; 3608/// \endcode 3609class SizeOfPackExpr : public Expr { 3610 /// \brief The location of the 'sizeof' keyword. 3611 SourceLocation OperatorLoc; 3612 3613 /// \brief The location of the name of the parameter pack. 3614 SourceLocation PackLoc; 3615 3616 /// \brief The location of the closing parenthesis. 3617 SourceLocation RParenLoc; 3618 3619 /// \brief The length of the parameter pack, if known. 3620 /// 3621 /// When this expression is value-dependent, the length of the parameter pack 3622 /// is unknown. When this expression is not value-dependent, the length is 3623 /// known. 3624 unsigned Length; 3625 3626 /// \brief The parameter pack itself. 3627 NamedDecl *Pack; 3628 3629 friend class ASTStmtReader; 3630 friend class ASTStmtWriter; 3631 3632public: 3633 /// \brief Creates a value-dependent expression that computes the length of 3634 /// the given parameter pack. 3635 SizeOfPackExpr(QualType SizeType, SourceLocation OperatorLoc, NamedDecl *Pack, 3636 SourceLocation PackLoc, SourceLocation RParenLoc) 3637 : Expr(SizeOfPackExprClass, SizeType, VK_RValue, OK_Ordinary, 3638 /*TypeDependent=*/false, /*ValueDependent=*/true, 3639 /*InstantiationDependent=*/true, 3640 /*ContainsUnexpandedParameterPack=*/false), 3641 OperatorLoc(OperatorLoc), PackLoc(PackLoc), RParenLoc(RParenLoc), 3642 Length(0), Pack(Pack) { } 3643 3644 /// \brief Creates an expression that computes the length of 3645 /// the given parameter pack, which is already known. 3646 SizeOfPackExpr(QualType SizeType, SourceLocation OperatorLoc, NamedDecl *Pack, 3647 SourceLocation PackLoc, SourceLocation RParenLoc, 3648 unsigned Length) 3649 : Expr(SizeOfPackExprClass, SizeType, VK_RValue, OK_Ordinary, 3650 /*TypeDependent=*/false, /*ValueDependent=*/false, 3651 /*InstantiationDependent=*/false, 3652 /*ContainsUnexpandedParameterPack=*/false), 3653 OperatorLoc(OperatorLoc), PackLoc(PackLoc), RParenLoc(RParenLoc), 3654 Length(Length), Pack(Pack) { } 3655 3656 /// \brief Create an empty expression. 3657 SizeOfPackExpr(EmptyShell Empty) : Expr(SizeOfPackExprClass, Empty) { } 3658 3659 /// \brief Determine the location of the 'sizeof' keyword. 3660 SourceLocation getOperatorLoc() const { return OperatorLoc; } 3661 3662 /// \brief Determine the location of the parameter pack. 3663 SourceLocation getPackLoc() const { return PackLoc; } 3664 3665 /// \brief Determine the location of the right parenthesis. 3666 SourceLocation getRParenLoc() const { return RParenLoc; } 3667 3668 /// \brief Retrieve the parameter pack. 3669 NamedDecl *getPack() const { return Pack; } 3670 3671 /// \brief Retrieve the length of the parameter pack. 3672 /// 3673 /// This routine may only be invoked when the expression is not 3674 /// value-dependent. 3675 unsigned getPackLength() const { 3676 assert(!isValueDependent() && 3677 "Cannot get the length of a value-dependent pack size expression"); 3678 return Length; 3679 } 3680 3681 SourceLocation getLocStart() const LLVM_READONLY { return OperatorLoc; } 3682 SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; } 3683 3684 static bool classof(const Stmt *T) { 3685 return T->getStmtClass() == SizeOfPackExprClass; 3686 } 3687 3688 // Iterators 3689 child_range children() { return child_range(); } 3690}; 3691 3692/// \brief Represents a reference to a non-type template parameter 3693/// that has been substituted with a template argument. 3694class SubstNonTypeTemplateParmExpr : public Expr { 3695 /// \brief The replaced parameter. 3696 NonTypeTemplateParmDecl *Param; 3697 3698 /// \brief The replacement expression. 3699 Stmt *Replacement; 3700 3701 /// \brief The location of the non-type template parameter reference. 3702 SourceLocation NameLoc; 3703 3704 friend class ASTReader; 3705 friend class ASTStmtReader; 3706 explicit SubstNonTypeTemplateParmExpr(EmptyShell Empty) 3707 : Expr(SubstNonTypeTemplateParmExprClass, Empty) { } 3708 3709public: 3710 SubstNonTypeTemplateParmExpr(QualType type, 3711 ExprValueKind valueKind, 3712 SourceLocation loc, 3713 NonTypeTemplateParmDecl *param, 3714 Expr *replacement) 3715 : Expr(SubstNonTypeTemplateParmExprClass, type, valueKind, OK_Ordinary, 3716 replacement->isTypeDependent(), replacement->isValueDependent(), 3717 replacement->isInstantiationDependent(), 3718 replacement->containsUnexpandedParameterPack()), 3719 Param(param), Replacement(replacement), NameLoc(loc) {} 3720 3721 SourceLocation getNameLoc() const { return NameLoc; } 3722 SourceLocation getLocStart() const LLVM_READONLY { return NameLoc; } 3723 SourceLocation getLocEnd() const LLVM_READONLY { return NameLoc; } 3724 3725 Expr *getReplacement() const { return cast<Expr>(Replacement); } 3726 3727 NonTypeTemplateParmDecl *getParameter() const { return Param; } 3728 3729 static bool classof(const Stmt *s) { 3730 return s->getStmtClass() == SubstNonTypeTemplateParmExprClass; 3731 } 3732 3733 // Iterators 3734 child_range children() { return child_range(&Replacement, &Replacement+1); } 3735}; 3736 3737/// \brief Represents a reference to a non-type template parameter pack that 3738/// has been substituted with a non-template argument pack. 3739/// 3740/// When a pack expansion in the source code contains multiple parameter packs 3741/// and those parameter packs correspond to different levels of template 3742/// parameter lists, this node is used to represent a non-type template 3743/// parameter pack from an outer level, which has already had its argument pack 3744/// substituted but that still lives within a pack expansion that itself 3745/// could not be instantiated. When actually performing a substitution into 3746/// that pack expansion (e.g., when all template parameters have corresponding 3747/// arguments), this type will be replaced with the appropriate underlying 3748/// expression at the current pack substitution index. 3749class SubstNonTypeTemplateParmPackExpr : public Expr { 3750 /// \brief The non-type template parameter pack itself. 3751 NonTypeTemplateParmDecl *Param; 3752 3753 /// \brief A pointer to the set of template arguments that this 3754 /// parameter pack is instantiated with. 3755 const TemplateArgument *Arguments; 3756 3757 /// \brief The number of template arguments in \c Arguments. 3758 unsigned NumArguments; 3759 3760 /// \brief The location of the non-type template parameter pack reference. 3761 SourceLocation NameLoc; 3762 3763 friend class ASTReader; 3764 friend class ASTStmtReader; 3765 explicit SubstNonTypeTemplateParmPackExpr(EmptyShell Empty) 3766 : Expr(SubstNonTypeTemplateParmPackExprClass, Empty) { } 3767 3768public: 3769 SubstNonTypeTemplateParmPackExpr(QualType T, 3770 NonTypeTemplateParmDecl *Param, 3771 SourceLocation NameLoc, 3772 const TemplateArgument &ArgPack); 3773 3774 /// \brief Retrieve the non-type template parameter pack being substituted. 3775 NonTypeTemplateParmDecl *getParameterPack() const { return Param; } 3776 3777 /// \brief Retrieve the location of the parameter pack name. 3778 SourceLocation getParameterPackLocation() const { return NameLoc; } 3779 3780 /// \brief Retrieve the template argument pack containing the substituted 3781 /// template arguments. 3782 TemplateArgument getArgumentPack() const; 3783 3784 SourceLocation getLocStart() const LLVM_READONLY { return NameLoc; } 3785 SourceLocation getLocEnd() const LLVM_READONLY { return NameLoc; } 3786 3787 static bool classof(const Stmt *T) { 3788 return T->getStmtClass() == SubstNonTypeTemplateParmPackExprClass; 3789 } 3790 3791 // Iterators 3792 child_range children() { return child_range(); } 3793}; 3794 3795/// \brief Represents a reference to a function parameter pack that has been 3796/// substituted but not yet expanded. 3797/// 3798/// When a pack expansion contains multiple parameter packs at different levels, 3799/// this node is used to represent a function parameter pack at an outer level 3800/// which we have already substituted to refer to expanded parameters, but where 3801/// the containing pack expansion cannot yet be expanded. 3802/// 3803/// \code 3804/// template<typename...Ts> struct S { 3805/// template<typename...Us> auto f(Ts ...ts) -> decltype(g(Us(ts)...)); 3806/// }; 3807/// template struct S<int, int>; 3808/// \endcode 3809class FunctionParmPackExpr : public Expr { 3810 /// \brief The function parameter pack which was referenced. 3811 ParmVarDecl *ParamPack; 3812 3813 /// \brief The location of the function parameter pack reference. 3814 SourceLocation NameLoc; 3815 3816 /// \brief The number of expansions of this pack. 3817 unsigned NumParameters; 3818 3819 FunctionParmPackExpr(QualType T, ParmVarDecl *ParamPack, 3820 SourceLocation NameLoc, unsigned NumParams, 3821 Decl * const *Params); 3822 3823 friend class ASTReader; 3824 friend class ASTStmtReader; 3825 3826public: 3827 static FunctionParmPackExpr *Create(ASTContext &Context, QualType T, 3828 ParmVarDecl *ParamPack, 3829 SourceLocation NameLoc, 3830 ArrayRef<Decl *> Params); 3831 static FunctionParmPackExpr *CreateEmpty(ASTContext &Context, 3832 unsigned NumParams); 3833 3834 /// \brief Get the parameter pack which this expression refers to. 3835 ParmVarDecl *getParameterPack() const { return ParamPack; } 3836 3837 /// \brief Get the location of the parameter pack. 3838 SourceLocation getParameterPackLocation() const { return NameLoc; } 3839 3840 /// \brief Iterators over the parameters which the parameter pack expanded 3841 /// into. 3842 typedef ParmVarDecl * const *iterator; 3843 iterator begin() const { return reinterpret_cast<iterator>(this+1); } 3844 iterator end() const { return begin() + NumParameters; } 3845 3846 /// \brief Get the number of parameters in this parameter pack. 3847 unsigned getNumExpansions() const { return NumParameters; } 3848 3849 /// \brief Get an expansion of the parameter pack by index. 3850 ParmVarDecl *getExpansion(unsigned I) const { return begin()[I]; } 3851 3852 SourceLocation getLocStart() const LLVM_READONLY { return NameLoc; } 3853 SourceLocation getLocEnd() const LLVM_READONLY { return NameLoc; } 3854 3855 static bool classof(const Stmt *T) { 3856 return T->getStmtClass() == FunctionParmPackExprClass; 3857 } 3858 3859 child_range children() { return child_range(); } 3860}; 3861 3862/// \brief Represents a prvalue temporary that written into memory so that 3863/// a reference can bind to it. 3864/// 3865/// Prvalue expressions are materialized when they need to have an address 3866/// in memory for a reference to bind to. This happens when binding a 3867/// reference to the result of a conversion, e.g., 3868/// 3869/// \code 3870/// const int &r = 1.0; 3871/// \endcode 3872/// 3873/// Here, 1.0 is implicitly converted to an \c int. That resulting \c int is 3874/// then materialized via a \c MaterializeTemporaryExpr, and the reference 3875/// binds to the temporary. \c MaterializeTemporaryExprs are always glvalues 3876/// (either an lvalue or an xvalue, depending on the kind of reference binding 3877/// to it), maintaining the invariant that references always bind to glvalues. 3878/// 3879/// Reference binding and copy-elision can both extend the lifetime of a 3880/// temporary. When either happens, the expression will also track the 3881/// declaration which is responsible for the lifetime extension. 3882class MaterializeTemporaryExpr : public Expr { 3883public: 3884 /// \brief The temporary-generating expression whose value will be 3885 /// materialized. 3886 Stmt *Temporary; 3887 3888 /// \brief The declaration which lifetime-extended this reference, if any. 3889 /// Either a VarDecl, or (for a ctor-initializer) a FieldDecl. 3890 const ValueDecl *ExtendingDecl; 3891 3892 friend class ASTStmtReader; 3893 friend class ASTStmtWriter; 3894 3895public: 3896 MaterializeTemporaryExpr(QualType T, Expr *Temporary, 3897 bool BoundToLvalueReference, 3898 const ValueDecl *ExtendedBy) 3899 : Expr(MaterializeTemporaryExprClass, T, 3900 BoundToLvalueReference? VK_LValue : VK_XValue, OK_Ordinary, 3901 Temporary->isTypeDependent(), Temporary->isValueDependent(), 3902 Temporary->isInstantiationDependent(), 3903 Temporary->containsUnexpandedParameterPack()), 3904 Temporary(Temporary), ExtendingDecl(ExtendedBy) { 3905 } 3906 3907 MaterializeTemporaryExpr(EmptyShell Empty) 3908 : Expr(MaterializeTemporaryExprClass, Empty) { } 3909 3910 /// \brief Retrieve the temporary-generating subexpression whose value will 3911 /// be materialized into a glvalue. 3912 Expr *GetTemporaryExpr() const { return static_cast<Expr *>(Temporary); } 3913 3914 /// \brief Retrieve the storage duration for the materialized temporary. 3915 StorageDuration getStorageDuration() const { 3916 if (!ExtendingDecl) 3917 return SD_FullExpression; 3918 // FIXME: This is not necessarily correct for a temporary materialized 3919 // within a default initializer. 3920 if (isa<FieldDecl>(ExtendingDecl)) 3921 return SD_Automatic; 3922 return cast<VarDecl>(ExtendingDecl)->getStorageDuration(); 3923 } 3924 3925 /// \brief Get the declaration which triggered the lifetime-extension of this 3926 /// temporary, if any. 3927 const ValueDecl *getExtendingDecl() const { return ExtendingDecl; } 3928 3929 void setExtendingDecl(const ValueDecl *ExtendedBy) { 3930 ExtendingDecl = ExtendedBy; 3931 } 3932 3933 /// \brief Determine whether this materialized temporary is bound to an 3934 /// lvalue reference; otherwise, it's bound to an rvalue reference. 3935 bool isBoundToLvalueReference() const { 3936 return getValueKind() == VK_LValue; 3937 } 3938 3939 SourceLocation getLocStart() const LLVM_READONLY { 3940 return Temporary->getLocStart(); 3941 } 3942 SourceLocation getLocEnd() const LLVM_READONLY { 3943 return Temporary->getLocEnd(); 3944 } 3945 3946 static bool classof(const Stmt *T) { 3947 return T->getStmtClass() == MaterializeTemporaryExprClass; 3948 } 3949 3950 // Iterators 3951 child_range children() { return child_range(&Temporary, &Temporary + 1); } 3952}; 3953 3954} // end namespace clang 3955 3956#endif 3957