ExprCXX.h revision dfca6f53ab97d28d43e3fa2564209df08f3d282c
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/Expr.h" 18#include "clang/AST/UnresolvedSet.h" 19#include "clang/AST/TemplateBase.h" 20#include "clang/Basic/ExpressionTraits.h" 21#include "clang/Basic/Lambda.h" 22#include "clang/Basic/TypeTraits.h" 23 24namespace clang { 25 26class CXXConstructorDecl; 27class CXXDestructorDecl; 28class CXXMethodDecl; 29class CXXTemporary; 30class TemplateArgumentListInfo; 31 32//===--------------------------------------------------------------------===// 33// C++ Expressions. 34//===--------------------------------------------------------------------===// 35 36/// \brief A call to an overloaded operator written using operator 37/// syntax. 38/// 39/// Represents a call to an overloaded operator written using operator 40/// syntax, e.g., "x + y" or "*p". While semantically equivalent to a 41/// normal call, this AST node provides better information about the 42/// syntactic representation of the call. 43/// 44/// In a C++ template, this expression node kind will be used whenever 45/// any of the arguments are type-dependent. In this case, the 46/// function itself will be a (possibly empty) set of functions and 47/// function templates that were found by name lookup at template 48/// definition time. 49class CXXOperatorCallExpr : public CallExpr { 50 /// \brief The overloaded operator. 51 OverloadedOperatorKind Operator; 52 53public: 54 CXXOperatorCallExpr(ASTContext& C, OverloadedOperatorKind Op, Expr *fn, 55 Expr **args, unsigned numargs, QualType t, 56 ExprValueKind VK, SourceLocation operatorloc) 57 : CallExpr(C, CXXOperatorCallExprClass, fn, 0, args, numargs, t, VK, 58 operatorloc), 59 Operator(Op) {} 60 explicit CXXOperatorCallExpr(ASTContext& C, EmptyShell Empty) : 61 CallExpr(C, CXXOperatorCallExprClass, Empty) { } 62 63 64 /// getOperator - Returns the kind of overloaded operator that this 65 /// expression refers to. 66 OverloadedOperatorKind getOperator() const { return Operator; } 67 void setOperator(OverloadedOperatorKind Kind) { Operator = Kind; } 68 69 /// getOperatorLoc - Returns the location of the operator symbol in 70 /// the expression. When @c getOperator()==OO_Call, this is the 71 /// location of the right parentheses; when @c 72 /// getOperator()==OO_Subscript, this is the location of the right 73 /// bracket. 74 SourceLocation getOperatorLoc() const { return getRParenLoc(); } 75 76 SourceRange getSourceRange() const; 77 78 static bool classof(const Stmt *T) { 79 return T->getStmtClass() == CXXOperatorCallExprClass; 80 } 81 static bool classof(const CXXOperatorCallExpr *) { return true; } 82}; 83 84/// CXXMemberCallExpr - Represents a call to a member function that 85/// may be written either with member call syntax (e.g., "obj.func()" 86/// or "objptr->func()") or with normal function-call syntax 87/// ("func()") within a member function that ends up calling a member 88/// function. The callee in either case is a MemberExpr that contains 89/// both the object argument and the member function, while the 90/// arguments are the arguments within the parentheses (not including 91/// the object argument). 92class CXXMemberCallExpr : public CallExpr { 93public: 94 CXXMemberCallExpr(ASTContext &C, Expr *fn, Expr **args, unsigned numargs, 95 QualType t, ExprValueKind VK, SourceLocation RP) 96 : CallExpr(C, CXXMemberCallExprClass, fn, 0, args, numargs, t, VK, RP) {} 97 98 CXXMemberCallExpr(ASTContext &C, EmptyShell Empty) 99 : CallExpr(C, CXXMemberCallExprClass, Empty) { } 100 101 /// getImplicitObjectArgument - Retrieves the implicit object 102 /// argument for the member call. For example, in "x.f(5)", this 103 /// operation would return "x". 104 Expr *getImplicitObjectArgument() const; 105 106 /// Retrieves the declaration of the called method. 107 CXXMethodDecl *getMethodDecl() const; 108 109 /// getRecordDecl - Retrieves the CXXRecordDecl for the underlying type of 110 /// the implicit object argument. Note that this is may not be the same 111 /// declaration as that of the class context of the CXXMethodDecl which this 112 /// function is calling. 113 /// FIXME: Returns 0 for member pointer call exprs. 114 CXXRecordDecl *getRecordDecl(); 115 116 static bool classof(const Stmt *T) { 117 return T->getStmtClass() == CXXMemberCallExprClass; 118 } 119 static bool classof(const CXXMemberCallExpr *) { return true; } 120}; 121 122/// CUDAKernelCallExpr - Represents a call to a CUDA kernel function. 123class CUDAKernelCallExpr : public CallExpr { 124private: 125 enum { CONFIG, END_PREARG }; 126 127public: 128 CUDAKernelCallExpr(ASTContext &C, Expr *fn, CallExpr *Config, 129 Expr **args, unsigned numargs, QualType t, 130 ExprValueKind VK, SourceLocation RP) 131 : CallExpr(C, CUDAKernelCallExprClass, fn, END_PREARG, args, numargs, t, VK, 132 RP) { 133 setConfig(Config); 134 } 135 136 CUDAKernelCallExpr(ASTContext &C, EmptyShell Empty) 137 : CallExpr(C, CUDAKernelCallExprClass, END_PREARG, Empty) { } 138 139 const CallExpr *getConfig() const { 140 return cast_or_null<CallExpr>(getPreArg(CONFIG)); 141 } 142 CallExpr *getConfig() { return cast_or_null<CallExpr>(getPreArg(CONFIG)); } 143 void setConfig(CallExpr *E) { setPreArg(CONFIG, E); } 144 145 static bool classof(const Stmt *T) { 146 return T->getStmtClass() == CUDAKernelCallExprClass; 147 } 148 static bool classof(const CUDAKernelCallExpr *) { return true; } 149}; 150 151/// CXXNamedCastExpr - Abstract class common to all of the C++ "named" 152/// casts, @c static_cast, @c dynamic_cast, @c reinterpret_cast, or @c 153/// const_cast. 154/// 155/// This abstract class is inherited by all of the classes 156/// representing "named" casts, e.g., CXXStaticCastExpr, 157/// CXXDynamicCastExpr, CXXReinterpretCastExpr, and CXXConstCastExpr. 158class CXXNamedCastExpr : public ExplicitCastExpr { 159private: 160 SourceLocation Loc; // the location of the casting op 161 SourceLocation RParenLoc; // the location of the right parenthesis 162 163protected: 164 CXXNamedCastExpr(StmtClass SC, QualType ty, ExprValueKind VK, 165 CastKind kind, Expr *op, unsigned PathSize, 166 TypeSourceInfo *writtenTy, SourceLocation l, 167 SourceLocation RParenLoc) 168 : ExplicitCastExpr(SC, ty, VK, kind, op, PathSize, writtenTy), Loc(l), 169 RParenLoc(RParenLoc) {} 170 171 explicit CXXNamedCastExpr(StmtClass SC, EmptyShell Shell, unsigned PathSize) 172 : ExplicitCastExpr(SC, Shell, PathSize) { } 173 174 friend class ASTStmtReader; 175 176public: 177 const char *getCastName() const; 178 179 /// \brief Retrieve the location of the cast operator keyword, e.g., 180 /// "static_cast". 181 SourceLocation getOperatorLoc() const { return Loc; } 182 183 /// \brief Retrieve the location of the closing parenthesis. 184 SourceLocation getRParenLoc() const { return RParenLoc; } 185 186 SourceRange getSourceRange() const { 187 return SourceRange(Loc, RParenLoc); 188 } 189 static bool classof(const Stmt *T) { 190 switch (T->getStmtClass()) { 191 case CXXStaticCastExprClass: 192 case CXXDynamicCastExprClass: 193 case CXXReinterpretCastExprClass: 194 case CXXConstCastExprClass: 195 return true; 196 default: 197 return false; 198 } 199 } 200 static bool classof(const CXXNamedCastExpr *) { return true; } 201}; 202 203/// CXXStaticCastExpr - A C++ @c static_cast expression 204/// (C++ [expr.static.cast]). 205/// 206/// This expression node represents a C++ static cast, e.g., 207/// @c static_cast<int>(1.0). 208class CXXStaticCastExpr : public CXXNamedCastExpr { 209 CXXStaticCastExpr(QualType ty, ExprValueKind vk, CastKind kind, Expr *op, 210 unsigned pathSize, TypeSourceInfo *writtenTy, 211 SourceLocation l, SourceLocation RParenLoc) 212 : CXXNamedCastExpr(CXXStaticCastExprClass, ty, vk, kind, op, pathSize, 213 writtenTy, l, RParenLoc) {} 214 215 explicit CXXStaticCastExpr(EmptyShell Empty, unsigned PathSize) 216 : CXXNamedCastExpr(CXXStaticCastExprClass, Empty, PathSize) { } 217 218public: 219 static CXXStaticCastExpr *Create(ASTContext &Context, QualType T, 220 ExprValueKind VK, CastKind K, Expr *Op, 221 const CXXCastPath *Path, 222 TypeSourceInfo *Written, SourceLocation L, 223 SourceLocation RParenLoc); 224 static CXXStaticCastExpr *CreateEmpty(ASTContext &Context, 225 unsigned PathSize); 226 227 static bool classof(const Stmt *T) { 228 return T->getStmtClass() == CXXStaticCastExprClass; 229 } 230 static bool classof(const CXXStaticCastExpr *) { return true; } 231}; 232 233/// CXXDynamicCastExpr - A C++ @c dynamic_cast expression 234/// (C++ [expr.dynamic.cast]), which may perform a run-time check to 235/// determine how to perform the type cast. 236/// 237/// This expression node represents a dynamic cast, e.g., 238/// @c dynamic_cast<Derived*>(BasePtr). 239class CXXDynamicCastExpr : public CXXNamedCastExpr { 240 CXXDynamicCastExpr(QualType ty, ExprValueKind VK, CastKind kind, 241 Expr *op, unsigned pathSize, TypeSourceInfo *writtenTy, 242 SourceLocation l, SourceLocation RParenLoc) 243 : CXXNamedCastExpr(CXXDynamicCastExprClass, ty, VK, kind, op, pathSize, 244 writtenTy, l, RParenLoc) {} 245 246 explicit CXXDynamicCastExpr(EmptyShell Empty, unsigned pathSize) 247 : CXXNamedCastExpr(CXXDynamicCastExprClass, Empty, pathSize) { } 248 249public: 250 static CXXDynamicCastExpr *Create(ASTContext &Context, QualType T, 251 ExprValueKind VK, CastKind Kind, Expr *Op, 252 const CXXCastPath *Path, 253 TypeSourceInfo *Written, SourceLocation L, 254 SourceLocation RParenLoc); 255 256 static CXXDynamicCastExpr *CreateEmpty(ASTContext &Context, 257 unsigned pathSize); 258 259 bool isAlwaysNull() const; 260 261 static bool classof(const Stmt *T) { 262 return T->getStmtClass() == CXXDynamicCastExprClass; 263 } 264 static bool classof(const CXXDynamicCastExpr *) { return true; } 265}; 266 267/// CXXReinterpretCastExpr - A C++ @c reinterpret_cast expression (C++ 268/// [expr.reinterpret.cast]), which provides a differently-typed view 269/// of a value but performs no actual work at run time. 270/// 271/// This expression node represents a reinterpret cast, e.g., 272/// @c reinterpret_cast<int>(VoidPtr). 273class CXXReinterpretCastExpr : public CXXNamedCastExpr { 274 CXXReinterpretCastExpr(QualType ty, ExprValueKind vk, CastKind kind, 275 Expr *op, unsigned pathSize, 276 TypeSourceInfo *writtenTy, SourceLocation l, 277 SourceLocation RParenLoc) 278 : CXXNamedCastExpr(CXXReinterpretCastExprClass, ty, vk, kind, op, 279 pathSize, writtenTy, l, RParenLoc) {} 280 281 CXXReinterpretCastExpr(EmptyShell Empty, unsigned pathSize) 282 : CXXNamedCastExpr(CXXReinterpretCastExprClass, Empty, pathSize) { } 283 284public: 285 static CXXReinterpretCastExpr *Create(ASTContext &Context, QualType T, 286 ExprValueKind VK, CastKind Kind, 287 Expr *Op, const CXXCastPath *Path, 288 TypeSourceInfo *WrittenTy, SourceLocation L, 289 SourceLocation RParenLoc); 290 static CXXReinterpretCastExpr *CreateEmpty(ASTContext &Context, 291 unsigned pathSize); 292 293 static bool classof(const Stmt *T) { 294 return T->getStmtClass() == CXXReinterpretCastExprClass; 295 } 296 static bool classof(const CXXReinterpretCastExpr *) { return true; } 297}; 298 299/// CXXConstCastExpr - A C++ @c const_cast expression (C++ [expr.const.cast]), 300/// which can remove type qualifiers but does not change the underlying value. 301/// 302/// This expression node represents a const cast, e.g., 303/// @c const_cast<char*>(PtrToConstChar). 304class CXXConstCastExpr : public CXXNamedCastExpr { 305 CXXConstCastExpr(QualType ty, ExprValueKind VK, Expr *op, 306 TypeSourceInfo *writtenTy, SourceLocation l, 307 SourceLocation RParenLoc) 308 : CXXNamedCastExpr(CXXConstCastExprClass, ty, VK, CK_NoOp, op, 309 0, writtenTy, l, RParenLoc) {} 310 311 explicit CXXConstCastExpr(EmptyShell Empty) 312 : CXXNamedCastExpr(CXXConstCastExprClass, Empty, 0) { } 313 314public: 315 static CXXConstCastExpr *Create(ASTContext &Context, QualType T, 316 ExprValueKind VK, Expr *Op, 317 TypeSourceInfo *WrittenTy, SourceLocation L, 318 SourceLocation RParenLoc); 319 static CXXConstCastExpr *CreateEmpty(ASTContext &Context); 320 321 static bool classof(const Stmt *T) { 322 return T->getStmtClass() == CXXConstCastExprClass; 323 } 324 static bool classof(const CXXConstCastExpr *) { return true; } 325}; 326 327/// CXXBoolLiteralExpr - [C++ 2.13.5] C++ Boolean Literal. 328/// 329class CXXBoolLiteralExpr : public Expr { 330 bool Value; 331 SourceLocation Loc; 332public: 333 CXXBoolLiteralExpr(bool val, QualType Ty, SourceLocation l) : 334 Expr(CXXBoolLiteralExprClass, Ty, VK_RValue, OK_Ordinary, false, false, 335 false, false), 336 Value(val), Loc(l) {} 337 338 explicit CXXBoolLiteralExpr(EmptyShell Empty) 339 : Expr(CXXBoolLiteralExprClass, Empty) { } 340 341 bool getValue() const { return Value; } 342 void setValue(bool V) { Value = V; } 343 344 SourceRange getSourceRange() const { return SourceRange(Loc); } 345 346 SourceLocation getLocation() const { return Loc; } 347 void setLocation(SourceLocation L) { Loc = L; } 348 349 static bool classof(const Stmt *T) { 350 return T->getStmtClass() == CXXBoolLiteralExprClass; 351 } 352 static bool classof(const CXXBoolLiteralExpr *) { return true; } 353 354 // Iterators 355 child_range children() { return child_range(); } 356}; 357 358/// CXXNullPtrLiteralExpr - [C++0x 2.14.7] C++ Pointer Literal 359class CXXNullPtrLiteralExpr : public Expr { 360 SourceLocation Loc; 361public: 362 CXXNullPtrLiteralExpr(QualType Ty, SourceLocation l) : 363 Expr(CXXNullPtrLiteralExprClass, Ty, VK_RValue, OK_Ordinary, false, false, 364 false, false), 365 Loc(l) {} 366 367 explicit CXXNullPtrLiteralExpr(EmptyShell Empty) 368 : Expr(CXXNullPtrLiteralExprClass, Empty) { } 369 370 SourceRange getSourceRange() const { return SourceRange(Loc); } 371 372 SourceLocation getLocation() const { return Loc; } 373 void setLocation(SourceLocation L) { Loc = L; } 374 375 static bool classof(const Stmt *T) { 376 return T->getStmtClass() == CXXNullPtrLiteralExprClass; 377 } 378 static bool classof(const CXXNullPtrLiteralExpr *) { return true; } 379 380 child_range children() { return child_range(); } 381}; 382 383/// CXXTypeidExpr - A C++ @c typeid expression (C++ [expr.typeid]), which gets 384/// the type_info that corresponds to the supplied type, or the (possibly 385/// dynamic) type of the supplied expression. 386/// 387/// This represents code like @c typeid(int) or @c typeid(*objPtr) 388class CXXTypeidExpr : public Expr { 389private: 390 llvm::PointerUnion<Stmt *, TypeSourceInfo *> Operand; 391 SourceRange Range; 392 393public: 394 CXXTypeidExpr(QualType Ty, TypeSourceInfo *Operand, SourceRange R) 395 : Expr(CXXTypeidExprClass, Ty, VK_LValue, OK_Ordinary, 396 // typeid is never type-dependent (C++ [temp.dep.expr]p4) 397 false, 398 // typeid is value-dependent if the type or expression are dependent 399 Operand->getType()->isDependentType(), 400 Operand->getType()->isInstantiationDependentType(), 401 Operand->getType()->containsUnexpandedParameterPack()), 402 Operand(Operand), Range(R) { } 403 404 CXXTypeidExpr(QualType Ty, Expr *Operand, SourceRange R) 405 : Expr(CXXTypeidExprClass, Ty, VK_LValue, OK_Ordinary, 406 // typeid is never type-dependent (C++ [temp.dep.expr]p4) 407 false, 408 // typeid is value-dependent if the type or expression are dependent 409 Operand->isTypeDependent() || Operand->isValueDependent(), 410 Operand->isInstantiationDependent(), 411 Operand->containsUnexpandedParameterPack()), 412 Operand(Operand), Range(R) { } 413 414 CXXTypeidExpr(EmptyShell Empty, bool isExpr) 415 : Expr(CXXTypeidExprClass, Empty) { 416 if (isExpr) 417 Operand = (Expr*)0; 418 else 419 Operand = (TypeSourceInfo*)0; 420 } 421 422 bool isTypeOperand() const { return Operand.is<TypeSourceInfo *>(); } 423 424 /// \brief Retrieves the type operand of this typeid() expression after 425 /// various required adjustments (removing reference types, cv-qualifiers). 426 QualType getTypeOperand() const; 427 428 /// \brief Retrieve source information for the type operand. 429 TypeSourceInfo *getTypeOperandSourceInfo() const { 430 assert(isTypeOperand() && "Cannot call getTypeOperand for typeid(expr)"); 431 return Operand.get<TypeSourceInfo *>(); 432 } 433 434 void setTypeOperandSourceInfo(TypeSourceInfo *TSI) { 435 assert(isTypeOperand() && "Cannot call getTypeOperand for typeid(expr)"); 436 Operand = TSI; 437 } 438 439 Expr *getExprOperand() const { 440 assert(!isTypeOperand() && "Cannot call getExprOperand for typeid(type)"); 441 return static_cast<Expr*>(Operand.get<Stmt *>()); 442 } 443 444 void setExprOperand(Expr *E) { 445 assert(!isTypeOperand() && "Cannot call getExprOperand for typeid(type)"); 446 Operand = E; 447 } 448 449 SourceRange getSourceRange() const { return Range; } 450 void setSourceRange(SourceRange R) { Range = R; } 451 452 static bool classof(const Stmt *T) { 453 return T->getStmtClass() == CXXTypeidExprClass; 454 } 455 static bool classof(const CXXTypeidExpr *) { return true; } 456 457 // Iterators 458 child_range children() { 459 if (isTypeOperand()) return child_range(); 460 Stmt **begin = reinterpret_cast<Stmt**>(&Operand); 461 return child_range(begin, begin + 1); 462 } 463}; 464 465/// CXXUuidofExpr - A microsoft C++ @c __uuidof expression, which gets 466/// the _GUID that corresponds to the supplied type or expression. 467/// 468/// This represents code like @c __uuidof(COMTYPE) or @c __uuidof(*comPtr) 469class CXXUuidofExpr : public Expr { 470private: 471 llvm::PointerUnion<Stmt *, TypeSourceInfo *> Operand; 472 SourceRange Range; 473 474public: 475 CXXUuidofExpr(QualType Ty, TypeSourceInfo *Operand, SourceRange R) 476 : Expr(CXXUuidofExprClass, Ty, VK_LValue, OK_Ordinary, 477 false, Operand->getType()->isDependentType(), 478 Operand->getType()->isInstantiationDependentType(), 479 Operand->getType()->containsUnexpandedParameterPack()), 480 Operand(Operand), Range(R) { } 481 482 CXXUuidofExpr(QualType Ty, Expr *Operand, SourceRange R) 483 : Expr(CXXUuidofExprClass, Ty, VK_LValue, OK_Ordinary, 484 false, Operand->isTypeDependent(), 485 Operand->isInstantiationDependent(), 486 Operand->containsUnexpandedParameterPack()), 487 Operand(Operand), Range(R) { } 488 489 CXXUuidofExpr(EmptyShell Empty, bool isExpr) 490 : Expr(CXXUuidofExprClass, Empty) { 491 if (isExpr) 492 Operand = (Expr*)0; 493 else 494 Operand = (TypeSourceInfo*)0; 495 } 496 497 bool isTypeOperand() const { return Operand.is<TypeSourceInfo *>(); } 498 499 /// \brief Retrieves the type operand of this __uuidof() expression after 500 /// various required adjustments (removing reference types, cv-qualifiers). 501 QualType getTypeOperand() const; 502 503 /// \brief Retrieve source information for the type operand. 504 TypeSourceInfo *getTypeOperandSourceInfo() const { 505 assert(isTypeOperand() && "Cannot call getTypeOperand for __uuidof(expr)"); 506 return Operand.get<TypeSourceInfo *>(); 507 } 508 509 void setTypeOperandSourceInfo(TypeSourceInfo *TSI) { 510 assert(isTypeOperand() && "Cannot call getTypeOperand for __uuidof(expr)"); 511 Operand = TSI; 512 } 513 514 Expr *getExprOperand() const { 515 assert(!isTypeOperand() && "Cannot call getExprOperand for __uuidof(type)"); 516 return static_cast<Expr*>(Operand.get<Stmt *>()); 517 } 518 519 void setExprOperand(Expr *E) { 520 assert(!isTypeOperand() && "Cannot call getExprOperand for __uuidof(type)"); 521 Operand = E; 522 } 523 524 SourceRange getSourceRange() const { return Range; } 525 void setSourceRange(SourceRange R) { Range = R; } 526 527 static bool classof(const Stmt *T) { 528 return T->getStmtClass() == CXXUuidofExprClass; 529 } 530 static bool classof(const CXXUuidofExpr *) { return true; } 531 532 // Iterators 533 child_range children() { 534 if (isTypeOperand()) return child_range(); 535 Stmt **begin = reinterpret_cast<Stmt**>(&Operand); 536 return child_range(begin, begin + 1); 537 } 538}; 539 540/// CXXThisExpr - Represents the "this" expression in C++, which is a 541/// pointer to the object on which the current member function is 542/// executing (C++ [expr.prim]p3). Example: 543/// 544/// @code 545/// class Foo { 546/// public: 547/// void bar(); 548/// void test() { this->bar(); } 549/// }; 550/// @endcode 551class CXXThisExpr : public Expr { 552 SourceLocation Loc; 553 bool Implicit : 1; 554 555public: 556 CXXThisExpr(SourceLocation L, QualType Type, bool isImplicit) 557 : Expr(CXXThisExprClass, Type, VK_RValue, OK_Ordinary, 558 // 'this' is type-dependent if the class type of the enclosing 559 // member function is dependent (C++ [temp.dep.expr]p2) 560 Type->isDependentType(), Type->isDependentType(), 561 Type->isInstantiationDependentType(), 562 /*ContainsUnexpandedParameterPack=*/false), 563 Loc(L), Implicit(isImplicit) { } 564 565 CXXThisExpr(EmptyShell Empty) : Expr(CXXThisExprClass, Empty) {} 566 567 SourceLocation getLocation() const { return Loc; } 568 void setLocation(SourceLocation L) { Loc = L; } 569 570 SourceRange getSourceRange() const { return SourceRange(Loc); } 571 572 bool isImplicit() const { return Implicit; } 573 void setImplicit(bool I) { Implicit = I; } 574 575 static bool classof(const Stmt *T) { 576 return T->getStmtClass() == CXXThisExprClass; 577 } 578 static bool classof(const CXXThisExpr *) { return true; } 579 580 // Iterators 581 child_range children() { return child_range(); } 582}; 583 584/// CXXThrowExpr - [C++ 15] C++ Throw Expression. This handles 585/// 'throw' and 'throw' assignment-expression. When 586/// assignment-expression isn't present, Op will be null. 587/// 588class CXXThrowExpr : public Expr { 589 Stmt *Op; 590 SourceLocation ThrowLoc; 591 /// \brief Whether the thrown variable (if any) is in scope. 592 unsigned IsThrownVariableInScope : 1; 593 594 friend class ASTStmtReader; 595 596public: 597 // Ty is the void type which is used as the result type of the 598 // exepression. The l is the location of the throw keyword. expr 599 // can by null, if the optional expression to throw isn't present. 600 CXXThrowExpr(Expr *expr, QualType Ty, SourceLocation l, 601 bool IsThrownVariableInScope) : 602 Expr(CXXThrowExprClass, Ty, VK_RValue, OK_Ordinary, false, false, 603 expr && expr->isInstantiationDependent(), 604 expr && expr->containsUnexpandedParameterPack()), 605 Op(expr), ThrowLoc(l), IsThrownVariableInScope(IsThrownVariableInScope) {} 606 CXXThrowExpr(EmptyShell Empty) : Expr(CXXThrowExprClass, Empty) {} 607 608 const Expr *getSubExpr() const { return cast_or_null<Expr>(Op); } 609 Expr *getSubExpr() { return cast_or_null<Expr>(Op); } 610 611 SourceLocation getThrowLoc() const { return ThrowLoc; } 612 613 /// \brief Determines whether the variable thrown by this expression (if any!) 614 /// is within the innermost try block. 615 /// 616 /// This information is required to determine whether the NRVO can apply to 617 /// this variable. 618 bool isThrownVariableInScope() const { return IsThrownVariableInScope; } 619 620 SourceRange getSourceRange() const { 621 if (getSubExpr() == 0) 622 return SourceRange(ThrowLoc, ThrowLoc); 623 return SourceRange(ThrowLoc, getSubExpr()->getSourceRange().getEnd()); 624 } 625 626 static bool classof(const Stmt *T) { 627 return T->getStmtClass() == CXXThrowExprClass; 628 } 629 static bool classof(const CXXThrowExpr *) { return true; } 630 631 // Iterators 632 child_range children() { 633 return child_range(&Op, Op ? &Op+1 : &Op); 634 } 635}; 636 637/// CXXDefaultArgExpr - C++ [dcl.fct.default]. This wraps up a 638/// function call argument that was created from the corresponding 639/// parameter's default argument, when the call did not explicitly 640/// supply arguments for all of the parameters. 641class CXXDefaultArgExpr : public Expr { 642 /// \brief The parameter whose default is being used. 643 /// 644 /// When the bit is set, the subexpression is stored after the 645 /// CXXDefaultArgExpr itself. When the bit is clear, the parameter's 646 /// actual default expression is the subexpression. 647 llvm::PointerIntPair<ParmVarDecl *, 1, bool> Param; 648 649 /// \brief The location where the default argument expression was used. 650 SourceLocation Loc; 651 652 CXXDefaultArgExpr(StmtClass SC, SourceLocation Loc, ParmVarDecl *param) 653 : Expr(SC, 654 param->hasUnparsedDefaultArg() 655 ? param->getType().getNonReferenceType() 656 : param->getDefaultArg()->getType(), 657 param->getDefaultArg()->getValueKind(), 658 param->getDefaultArg()->getObjectKind(), false, false, false, false), 659 Param(param, false), Loc(Loc) { } 660 661 CXXDefaultArgExpr(StmtClass SC, SourceLocation Loc, ParmVarDecl *param, 662 Expr *SubExpr) 663 : Expr(SC, SubExpr->getType(), 664 SubExpr->getValueKind(), SubExpr->getObjectKind(), 665 false, false, false, false), 666 Param(param, true), Loc(Loc) { 667 *reinterpret_cast<Expr **>(this + 1) = SubExpr; 668 } 669 670public: 671 CXXDefaultArgExpr(EmptyShell Empty) : Expr(CXXDefaultArgExprClass, Empty) {} 672 673 674 // Param is the parameter whose default argument is used by this 675 // expression. 676 static CXXDefaultArgExpr *Create(ASTContext &C, SourceLocation Loc, 677 ParmVarDecl *Param) { 678 return new (C) CXXDefaultArgExpr(CXXDefaultArgExprClass, Loc, Param); 679 } 680 681 // Param is the parameter whose default argument is used by this 682 // expression, and SubExpr is the expression that will actually be used. 683 static CXXDefaultArgExpr *Create(ASTContext &C, 684 SourceLocation Loc, 685 ParmVarDecl *Param, 686 Expr *SubExpr); 687 688 // Retrieve the parameter that the argument was created from. 689 const ParmVarDecl *getParam() const { return Param.getPointer(); } 690 ParmVarDecl *getParam() { return Param.getPointer(); } 691 692 // Retrieve the actual argument to the function call. 693 const Expr *getExpr() const { 694 if (Param.getInt()) 695 return *reinterpret_cast<Expr const * const*> (this + 1); 696 return getParam()->getDefaultArg(); 697 } 698 Expr *getExpr() { 699 if (Param.getInt()) 700 return *reinterpret_cast<Expr **> (this + 1); 701 return getParam()->getDefaultArg(); 702 } 703 704 /// \brief Retrieve the location where this default argument was actually 705 /// used. 706 SourceLocation getUsedLocation() const { return Loc; } 707 708 SourceRange getSourceRange() const { 709 // Default argument expressions have no representation in the 710 // source, so they have an empty source range. 711 return SourceRange(); 712 } 713 714 static bool classof(const Stmt *T) { 715 return T->getStmtClass() == CXXDefaultArgExprClass; 716 } 717 static bool classof(const CXXDefaultArgExpr *) { return true; } 718 719 // Iterators 720 child_range children() { return child_range(); } 721 722 friend class ASTStmtReader; 723 friend class ASTStmtWriter; 724}; 725 726/// CXXTemporary - Represents a C++ temporary. 727class CXXTemporary { 728 /// Destructor - The destructor that needs to be called. 729 const CXXDestructorDecl *Destructor; 730 731 CXXTemporary(const CXXDestructorDecl *destructor) 732 : Destructor(destructor) { } 733 734public: 735 static CXXTemporary *Create(ASTContext &C, 736 const CXXDestructorDecl *Destructor); 737 738 const CXXDestructorDecl *getDestructor() const { return Destructor; } 739}; 740 741/// \brief Represents binding an expression to a temporary. 742/// 743/// This ensures the destructor is called for the temporary. It should only be 744/// needed for non-POD, non-trivially destructable class types. For example: 745/// 746/// \code 747/// struct S { 748/// S() { } // User defined constructor makes S non-POD. 749/// ~S() { } // User defined destructor makes it non-trivial. 750/// }; 751/// void test() { 752/// const S &s_ref = S(); // Requires a CXXBindTemporaryExpr. 753/// } 754/// \endcode 755class CXXBindTemporaryExpr : public Expr { 756 CXXTemporary *Temp; 757 758 Stmt *SubExpr; 759 760 CXXBindTemporaryExpr(CXXTemporary *temp, Expr* SubExpr) 761 : Expr(CXXBindTemporaryExprClass, SubExpr->getType(), 762 VK_RValue, OK_Ordinary, SubExpr->isTypeDependent(), 763 SubExpr->isValueDependent(), 764 SubExpr->isInstantiationDependent(), 765 SubExpr->containsUnexpandedParameterPack()), 766 Temp(temp), SubExpr(SubExpr) { } 767 768public: 769 CXXBindTemporaryExpr(EmptyShell Empty) 770 : Expr(CXXBindTemporaryExprClass, Empty), Temp(0), SubExpr(0) {} 771 772 static CXXBindTemporaryExpr *Create(ASTContext &C, CXXTemporary *Temp, 773 Expr* SubExpr); 774 775 CXXTemporary *getTemporary() { return Temp; } 776 const CXXTemporary *getTemporary() const { return Temp; } 777 void setTemporary(CXXTemporary *T) { Temp = T; } 778 779 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 780 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 781 void setSubExpr(Expr *E) { SubExpr = E; } 782 783 SourceRange getSourceRange() const { 784 return SubExpr->getSourceRange(); 785 } 786 787 // Implement isa/cast/dyncast/etc. 788 static bool classof(const Stmt *T) { 789 return T->getStmtClass() == CXXBindTemporaryExprClass; 790 } 791 static bool classof(const CXXBindTemporaryExpr *) { return true; } 792 793 // Iterators 794 child_range children() { return child_range(&SubExpr, &SubExpr + 1); } 795}; 796 797/// CXXConstructExpr - Represents a call to a C++ constructor. 798class CXXConstructExpr : public Expr { 799public: 800 enum ConstructionKind { 801 CK_Complete, 802 CK_NonVirtualBase, 803 CK_VirtualBase, 804 CK_Delegating 805 }; 806 807private: 808 CXXConstructorDecl *Constructor; 809 810 SourceLocation Loc; 811 SourceRange ParenRange; 812 unsigned NumArgs : 16; 813 bool Elidable : 1; 814 bool HadMultipleCandidates : 1; 815 bool ListInitialization : 1; 816 bool ZeroInitialization : 1; 817 unsigned ConstructKind : 2; 818 Stmt **Args; 819 820protected: 821 CXXConstructExpr(ASTContext &C, StmtClass SC, QualType T, 822 SourceLocation Loc, 823 CXXConstructorDecl *d, bool elidable, 824 Expr **args, unsigned numargs, 825 bool HadMultipleCandidates, 826 bool ListInitialization, 827 bool ZeroInitialization, 828 ConstructionKind ConstructKind, 829 SourceRange ParenRange); 830 831 /// \brief Construct an empty C++ construction expression. 832 CXXConstructExpr(StmtClass SC, EmptyShell Empty) 833 : Expr(SC, Empty), Constructor(0), NumArgs(0), Elidable(false), 834 HadMultipleCandidates(false), ListInitialization(false), 835 ZeroInitialization(false), ConstructKind(0), Args(0) 836 { } 837 838public: 839 /// \brief Construct an empty C++ construction expression. 840 explicit CXXConstructExpr(EmptyShell Empty) 841 : Expr(CXXConstructExprClass, Empty), Constructor(0), 842 NumArgs(0), Elidable(false), HadMultipleCandidates(false), 843 ListInitialization(false), ZeroInitialization(false), 844 ConstructKind(0), Args(0) 845 { } 846 847 static CXXConstructExpr *Create(ASTContext &C, QualType T, 848 SourceLocation Loc, 849 CXXConstructorDecl *D, bool Elidable, 850 Expr **Args, unsigned NumArgs, 851 bool HadMultipleCandidates, 852 bool ListInitialization, 853 bool ZeroInitialization, 854 ConstructionKind ConstructKind, 855 SourceRange ParenRange); 856 857 CXXConstructorDecl* getConstructor() const { return Constructor; } 858 void setConstructor(CXXConstructorDecl *C) { Constructor = C; } 859 860 SourceLocation getLocation() const { return Loc; } 861 void setLocation(SourceLocation Loc) { this->Loc = Loc; } 862 863 /// \brief Whether this construction is elidable. 864 bool isElidable() const { return Elidable; } 865 void setElidable(bool E) { Elidable = E; } 866 867 /// \brief Whether the referred constructor was resolved from 868 /// an overloaded set having size greater than 1. 869 bool hadMultipleCandidates() const { return HadMultipleCandidates; } 870 void setHadMultipleCandidates(bool V) { HadMultipleCandidates = V; } 871 872 /// \brief Whether this constructor call was written as list-initialization. 873 bool isListInitialization() const { return ListInitialization; } 874 void setListInitialization(bool V) { ListInitialization = V; } 875 876 /// \brief Whether this construction first requires 877 /// zero-initialization before the initializer is called. 878 bool requiresZeroInitialization() const { return ZeroInitialization; } 879 void setRequiresZeroInitialization(bool ZeroInit) { 880 ZeroInitialization = ZeroInit; 881 } 882 883 /// \brief Determines whether this constructor is actually constructing 884 /// a base class (rather than a complete object). 885 ConstructionKind getConstructionKind() const { 886 return (ConstructionKind)ConstructKind; 887 } 888 void setConstructionKind(ConstructionKind CK) { 889 ConstructKind = CK; 890 } 891 892 typedef ExprIterator arg_iterator; 893 typedef ConstExprIterator const_arg_iterator; 894 895 arg_iterator arg_begin() { return Args; } 896 arg_iterator arg_end() { return Args + NumArgs; } 897 const_arg_iterator arg_begin() const { return Args; } 898 const_arg_iterator arg_end() const { return Args + NumArgs; } 899 900 Expr **getArgs() const { return reinterpret_cast<Expr **>(Args); } 901 unsigned getNumArgs() const { return NumArgs; } 902 903 /// getArg - Return the specified argument. 904 Expr *getArg(unsigned Arg) { 905 assert(Arg < NumArgs && "Arg access out of range!"); 906 return cast<Expr>(Args[Arg]); 907 } 908 const Expr *getArg(unsigned Arg) const { 909 assert(Arg < NumArgs && "Arg access out of range!"); 910 return cast<Expr>(Args[Arg]); 911 } 912 913 /// setArg - Set the specified argument. 914 void setArg(unsigned Arg, Expr *ArgExpr) { 915 assert(Arg < NumArgs && "Arg access out of range!"); 916 Args[Arg] = ArgExpr; 917 } 918 919 SourceRange getSourceRange() const; 920 SourceRange getParenRange() const { return ParenRange; } 921 922 static bool classof(const Stmt *T) { 923 return T->getStmtClass() == CXXConstructExprClass || 924 T->getStmtClass() == CXXTemporaryObjectExprClass; 925 } 926 static bool classof(const CXXConstructExpr *) { return true; } 927 928 // Iterators 929 child_range children() { 930 return child_range(&Args[0], &Args[0]+NumArgs); 931 } 932 933 friend class ASTStmtReader; 934}; 935 936/// CXXFunctionalCastExpr - Represents an explicit C++ type conversion 937/// that uses "functional" notion (C++ [expr.type.conv]). Example: @c 938/// x = int(0.5); 939class CXXFunctionalCastExpr : public ExplicitCastExpr { 940 SourceLocation TyBeginLoc; 941 SourceLocation RParenLoc; 942 943 CXXFunctionalCastExpr(QualType ty, ExprValueKind VK, 944 TypeSourceInfo *writtenTy, 945 SourceLocation tyBeginLoc, CastKind kind, 946 Expr *castExpr, unsigned pathSize, 947 SourceLocation rParenLoc) 948 : ExplicitCastExpr(CXXFunctionalCastExprClass, ty, VK, kind, 949 castExpr, pathSize, writtenTy), 950 TyBeginLoc(tyBeginLoc), RParenLoc(rParenLoc) {} 951 952 explicit CXXFunctionalCastExpr(EmptyShell Shell, unsigned PathSize) 953 : ExplicitCastExpr(CXXFunctionalCastExprClass, Shell, PathSize) { } 954 955public: 956 static CXXFunctionalCastExpr *Create(ASTContext &Context, QualType T, 957 ExprValueKind VK, 958 TypeSourceInfo *Written, 959 SourceLocation TyBeginLoc, 960 CastKind Kind, Expr *Op, 961 const CXXCastPath *Path, 962 SourceLocation RPLoc); 963 static CXXFunctionalCastExpr *CreateEmpty(ASTContext &Context, 964 unsigned PathSize); 965 966 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 967 void setTypeBeginLoc(SourceLocation L) { TyBeginLoc = L; } 968 SourceLocation getRParenLoc() const { return RParenLoc; } 969 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 970 971 SourceRange getSourceRange() const { 972 return SourceRange(TyBeginLoc, RParenLoc); 973 } 974 static bool classof(const Stmt *T) { 975 return T->getStmtClass() == CXXFunctionalCastExprClass; 976 } 977 static bool classof(const CXXFunctionalCastExpr *) { return true; } 978}; 979 980/// @brief Represents a C++ functional cast expression that builds a 981/// temporary object. 982/// 983/// This expression type represents a C++ "functional" cast 984/// (C++[expr.type.conv]) with N != 1 arguments that invokes a 985/// constructor to build a temporary object. With N == 1 arguments the 986/// functional cast expression will be represented by CXXFunctionalCastExpr. 987/// Example: 988/// @code 989/// struct X { X(int, float); } 990/// 991/// X create_X() { 992/// return X(1, 3.14f); // creates a CXXTemporaryObjectExpr 993/// }; 994/// @endcode 995class CXXTemporaryObjectExpr : public CXXConstructExpr { 996 TypeSourceInfo *Type; 997 998public: 999 CXXTemporaryObjectExpr(ASTContext &C, CXXConstructorDecl *Cons, 1000 TypeSourceInfo *Type, 1001 Expr **Args,unsigned NumArgs, 1002 SourceRange parenRange, 1003 bool HadMultipleCandidates, 1004 bool ZeroInitialization = false); 1005 explicit CXXTemporaryObjectExpr(EmptyShell Empty) 1006 : CXXConstructExpr(CXXTemporaryObjectExprClass, Empty), Type() { } 1007 1008 TypeSourceInfo *getTypeSourceInfo() const { return Type; } 1009 1010 SourceRange getSourceRange() const; 1011 1012 static bool classof(const Stmt *T) { 1013 return T->getStmtClass() == CXXTemporaryObjectExprClass; 1014 } 1015 static bool classof(const CXXTemporaryObjectExpr *) { return true; } 1016 1017 friend class ASTStmtReader; 1018}; 1019 1020/// \brief A C++ lambda expression, which produces a function object 1021/// (of unspecified type) that can be invoked later. 1022/// 1023/// Example: 1024/// \code 1025/// void low_pass_filter(std::vector<double> &values, double cutoff) { 1026/// values.erase(std::remove_if(values.begin(), values.end(), 1027// [=](double value) { return value > cutoff; }); 1028/// } 1029/// \endcode 1030/// 1031/// Lambda expressions can capture local variables, either by copying 1032/// the values of those local variables at the time the function 1033/// object is constructed (not when it is called!) or by holding a 1034/// reference to the local variable. These captures can occur either 1035/// implicitly or can be written explicitly between the square 1036/// brackets ([...]) that start the lambda expression. 1037class LambdaExpr : public Expr { 1038 enum { 1039 /// \brief Flag used by the Capture class to indicate that the given 1040 /// capture was implicit. 1041 Capture_Implicit = 0x01, 1042 1043 /// \brief Flag used by the Capture class to indciate that the 1044 /// given capture was by-copy. 1045 Capture_ByCopy = 0x02 1046 }; 1047 1048 /// \brief The source range that covers the lambda introducer ([...]). 1049 SourceRange IntroducerRange; 1050 1051 /// \brief The number of captures. 1052 unsigned NumCaptures : 16; 1053 1054 /// \brief The default capture kind, which is a value of type 1055 /// LambdaCaptureDefault. 1056 unsigned CaptureDefault : 2; 1057 1058 /// \brief Whether this lambda had an explicit parameter list vs. an 1059 /// implicit (and empty) parameter list. 1060 unsigned ExplicitParams : 1; 1061 1062 /// \brief Whether this lambda had the result type explicitly specified. 1063 unsigned ExplicitResultType : 1; 1064 1065 /// \brief Whether there are any array index variables stored at the end of 1066 /// this lambda expression. 1067 unsigned HasArrayIndexVars : 1; 1068 1069 /// \brief The location of the closing brace ('}') that completes 1070 /// the lambda. 1071 /// 1072 /// The location of the brace is also available by looking up the 1073 /// function call operator in the lambda class. However, it is 1074 /// stored here to improve the performance of getSourceRange(), and 1075 /// to avoid having to deserialize the function call operator from a 1076 /// module file just to determine the source range. 1077 SourceLocation ClosingBrace; 1078 1079 // Note: The capture initializers are stored directly after the lambda 1080 // expression, along with the index variables used to initialize by-copy 1081 // array captures. 1082 1083public: 1084 /// \brief Describes the capture of either a variable or 'this'. 1085 class Capture { 1086 llvm::PointerIntPair<VarDecl *, 2> VarAndBits; 1087 SourceLocation Loc; 1088 SourceLocation EllipsisLoc; 1089 1090 friend class ASTStmtReader; 1091 friend class ASTStmtWriter; 1092 1093 public: 1094 /// \brief Create a new capture. 1095 /// 1096 /// \param Loc The source location associated with this capture. 1097 /// 1098 /// \param Kind The kind of capture (this, byref, bycopy). 1099 /// 1100 /// \param Implicit Whether the capture was implicit or explicit. 1101 /// 1102 /// \param Var The local variable being captured, or null if capturing this. 1103 /// 1104 /// \param EllipsisLoc The location of the ellipsis (...) for a 1105 /// capture that is a pack expansion, or an invalid source 1106 /// location to indicate that this is not a pack expansion. 1107 Capture(SourceLocation Loc, bool Implicit, 1108 LambdaCaptureKind Kind, VarDecl *Var = 0, 1109 SourceLocation EllipsisLoc = SourceLocation()); 1110 1111 /// \brief Determine the kind of capture. 1112 LambdaCaptureKind getCaptureKind() const; 1113 1114 /// \brief Determine whether this capture handles the C++ 'this' 1115 /// pointer. 1116 bool capturesThis() const { return VarAndBits.getPointer() == 0; } 1117 1118 /// \brief Determine whether this capture handles a variable. 1119 bool capturesVariable() const { return VarAndBits.getPointer() != 0; } 1120 1121 /// \brief Retrieve the declaration of the local variable being 1122 /// captured. 1123 /// 1124 /// This operation is only valid if this capture does not capture 1125 /// 'this'. 1126 VarDecl *getCapturedVar() const { 1127 assert(!capturesThis() && "No variable available for 'this' capture"); 1128 return VarAndBits.getPointer(); 1129 } 1130 1131 /// \brief Determine whether this was an implicit capture (not 1132 /// written between the square brackets introducing the lambda). 1133 bool isImplicit() const { return VarAndBits.getInt() & Capture_Implicit; } 1134 1135 /// \brief Determine whether this was an explicit capture, written 1136 /// between the square brackets introducing the lambda. 1137 bool isExplicit() const { return !isImplicit(); } 1138 1139 /// \brief Retrieve the source location of the capture. 1140 /// 1141 /// For an explicit capture, this returns the location of the 1142 /// explicit capture in the source. For an implicit capture, this 1143 /// returns the location at which the variable or 'this' was first 1144 /// used. 1145 SourceLocation getLocation() const { return Loc; } 1146 1147 /// \brief Determine whether this capture is a pack expansion, 1148 /// which captures a function parameter pack. 1149 bool isPackExpansion() const { return EllipsisLoc.isValid(); } 1150 1151 /// \brief Retrieve the location of the ellipsis for a capture 1152 /// that is a pack expansion. 1153 SourceLocation getEllipsisLoc() const { 1154 assert(isPackExpansion() && "No ellipsis location for a non-expansion"); 1155 return EllipsisLoc; 1156 } 1157 }; 1158 1159private: 1160 /// \brief Construct a lambda expression. 1161 LambdaExpr(QualType T, SourceRange IntroducerRange, 1162 LambdaCaptureDefault CaptureDefault, 1163 ArrayRef<Capture> Captures, 1164 bool ExplicitParams, 1165 bool ExplicitResultType, 1166 ArrayRef<Expr *> CaptureInits, 1167 ArrayRef<VarDecl *> ArrayIndexVars, 1168 ArrayRef<unsigned> ArrayIndexStarts, 1169 SourceLocation ClosingBrace); 1170 1171 Stmt **getStoredStmts() const { 1172 return reinterpret_cast<Stmt **>(const_cast<LambdaExpr *>(this) + 1); 1173 } 1174 1175 /// \brief Retrieve the mapping from captures to the first array index 1176 /// variable. 1177 unsigned *getArrayIndexStarts() const { 1178 return reinterpret_cast<unsigned *>(getStoredStmts() + NumCaptures + 1); 1179 } 1180 1181 /// \brief Retrieve the complete set of array-index variables. 1182 VarDecl **getArrayIndexVars() const { 1183 return reinterpret_cast<VarDecl **>( 1184 getArrayIndexStarts() + NumCaptures + 1); 1185 } 1186 1187public: 1188 /// \brief Construct a new lambda expression. 1189 static LambdaExpr *Create(ASTContext &C, 1190 CXXRecordDecl *Class, 1191 SourceRange IntroducerRange, 1192 LambdaCaptureDefault CaptureDefault, 1193 ArrayRef<Capture> Captures, 1194 bool ExplicitParams, 1195 bool ExplicitResultType, 1196 ArrayRef<Expr *> CaptureInits, 1197 ArrayRef<VarDecl *> ArrayIndexVars, 1198 ArrayRef<unsigned> ArrayIndexStarts, 1199 SourceLocation ClosingBrace); 1200 1201 /// \brief Determine the default capture kind for this lambda. 1202 LambdaCaptureDefault getCaptureDefault() const { 1203 return static_cast<LambdaCaptureDefault>(CaptureDefault); 1204 } 1205 1206 /// \brief An iterator that walks over the captures of the lambda, 1207 /// both implicit and explicit. 1208 typedef const Capture *capture_iterator; 1209 1210 /// \brief Retrieve an iterator pointing to the first lambda capture. 1211 capture_iterator capture_begin() const; 1212 1213 /// \brief Retrieve an iterator pointing past the end of the 1214 /// sequence of lambda captures. 1215 capture_iterator capture_end() const; 1216 1217 /// \brief Determine the number of captures in this lambda. 1218 unsigned capture_size() const { return NumCaptures; } 1219 1220 /// \brief Retrieve an iterator pointing to the first explicit 1221 /// lambda capture. 1222 capture_iterator explicit_capture_begin() const; 1223 1224 /// \brief Retrieve an iterator pointing past the end of the sequence of 1225 /// explicit lambda captures. 1226 capture_iterator explicit_capture_end() const; 1227 1228 /// \brief Retrieve an iterator pointing to the first implicit 1229 /// lambda capture. 1230 capture_iterator implicit_capture_begin() const; 1231 1232 /// \brief Retrieve an iterator pointing past the end of the sequence of 1233 /// implicit lambda captures. 1234 capture_iterator implicit_capture_end() const; 1235 1236 /// \brief Iterator that walks over the capture initialization 1237 /// arguments. 1238 typedef Expr **capture_init_iterator; 1239 1240 /// \brief Retrieve the first initialization argument for this 1241 /// lambda expression (which initializes the first capture field). 1242 capture_init_iterator capture_init_begin() const { 1243 return reinterpret_cast<Expr **>(getStoredStmts()); 1244 } 1245 1246 /// \brief Retrieve the iterator pointing one past the last 1247 /// initialization argument for this lambda expression. 1248 capture_init_iterator capture_init_end() const { 1249 return capture_init_begin() + NumCaptures; 1250 } 1251 1252 /// \brief Retrieve the set of index variables used in the capture 1253 /// initializer of an array captured by copy. 1254 /// 1255 /// \param Iter The iterator that points at the capture initializer for 1256 /// which we are extracting the corresponding index variables. 1257 ArrayRef<VarDecl *> getCaptureInitIndexVars(capture_init_iterator Iter) const; 1258 1259 /// \brief Retrieve the source range covering the lambda introducer, 1260 /// which contains the explicit capture list surrounded by square 1261 /// brackets ([...]). 1262 SourceRange getIntroducerRange() const { return IntroducerRange; } 1263 1264 /// \brief Retrieve the class that corresponds to the lambda, which 1265 /// stores the captures in its fields and provides the various 1266 /// operations permitted on a lambda (copying, calling). 1267 CXXRecordDecl *getLambdaClass() const; 1268 1269 /// \brief Retrieve the function call operator associated with this 1270 /// lambda expression. 1271 CXXMethodDecl *getCallOperator() const; 1272 1273 /// \brief Retrieve the body of the lambda. 1274 CompoundStmt *getBody() const { 1275 return reinterpret_cast<CompoundStmt *>(getStoredStmts()[NumCaptures]); 1276 } 1277 1278 /// \brief Determine whether the lambda is mutable, meaning that any 1279 /// captures values can be modified. 1280 bool isMutable() const; 1281 1282 /// \brief Determine whether this lambda has an explicit parameter 1283 /// list vs. an implicit (empty) parameter list. 1284 bool hasExplicitParameters() const { return ExplicitParams; } 1285 1286 /// \brief Whether this lambda had its result type explicitly specified. 1287 bool hasExplicitResultType() const { return ExplicitResultType; } 1288 1289 static bool classof(const Stmt *T) { 1290 return T->getStmtClass() == LambdaExprClass; 1291 } 1292 static bool classof(const LambdaExpr *) { return true; } 1293 1294 SourceRange getSourceRange() const { 1295 return SourceRange(IntroducerRange.getBegin(), ClosingBrace); 1296 } 1297 1298 child_range children() { 1299 return child_range(getStoredStmts(), getStoredStmts() + NumCaptures + 1); 1300 } 1301 1302 friend class ASTStmtReader; 1303 friend class ASTStmtWriter; 1304}; 1305 1306/// CXXScalarValueInitExpr - [C++ 5.2.3p2] 1307/// Expression "T()" which creates a value-initialized rvalue of type 1308/// T, which is a non-class type. 1309/// 1310class CXXScalarValueInitExpr : public Expr { 1311 SourceLocation RParenLoc; 1312 TypeSourceInfo *TypeInfo; 1313 1314 friend class ASTStmtReader; 1315 1316public: 1317 /// \brief Create an explicitly-written scalar-value initialization 1318 /// expression. 1319 CXXScalarValueInitExpr(QualType Type, 1320 TypeSourceInfo *TypeInfo, 1321 SourceLocation rParenLoc ) : 1322 Expr(CXXScalarValueInitExprClass, Type, VK_RValue, OK_Ordinary, 1323 false, false, Type->isInstantiationDependentType(), false), 1324 RParenLoc(rParenLoc), TypeInfo(TypeInfo) {} 1325 1326 explicit CXXScalarValueInitExpr(EmptyShell Shell) 1327 : Expr(CXXScalarValueInitExprClass, Shell) { } 1328 1329 TypeSourceInfo *getTypeSourceInfo() const { 1330 return TypeInfo; 1331 } 1332 1333 SourceLocation getRParenLoc() const { return RParenLoc; } 1334 1335 SourceRange getSourceRange() const; 1336 1337 static bool classof(const Stmt *T) { 1338 return T->getStmtClass() == CXXScalarValueInitExprClass; 1339 } 1340 static bool classof(const CXXScalarValueInitExpr *) { return true; } 1341 1342 // Iterators 1343 child_range children() { return child_range(); } 1344}; 1345 1346/// CXXNewExpr - A new expression for memory allocation and constructor calls, 1347/// e.g: "new CXXNewExpr(foo)". 1348class CXXNewExpr : public Expr { 1349 // Was the usage ::new, i.e. is the global new to be used? 1350 bool GlobalNew : 1; 1351 // Is there an initializer? If not, built-ins are uninitialized, else they're 1352 // value-initialized. 1353 bool Initializer : 1; 1354 // Do we allocate an array? If so, the first SubExpr is the size expression. 1355 bool Array : 1; 1356 // If this is an array allocation, does the usual deallocation 1357 // function for the allocated type want to know the allocated size? 1358 bool UsualArrayDeleteWantsSize : 1; 1359 // Whether the referred constructor (if any) was resolved from an 1360 // overload set having size greater than 1. 1361 bool HadMultipleCandidates : 1; 1362 // The number of placement new arguments. 1363 unsigned NumPlacementArgs : 13; 1364 // The number of constructor arguments. This may be 1 even for non-class 1365 // types; use the pseudo copy constructor. 1366 unsigned NumConstructorArgs : 14; 1367 // Contains an optional array size expression, any number of optional 1368 // placement arguments, and any number of optional constructor arguments, 1369 // in that order. 1370 Stmt **SubExprs; 1371 // Points to the allocation function used. 1372 FunctionDecl *OperatorNew; 1373 // Points to the deallocation function used in case of error. May be null. 1374 FunctionDecl *OperatorDelete; 1375 // Points to the constructor used. Cannot be null if AllocType is a record; 1376 // it would still point at the default constructor (even an implicit one). 1377 // Must be null for all other types. 1378 CXXConstructorDecl *Constructor; 1379 1380 /// \brief The allocated type-source information, as written in the source. 1381 TypeSourceInfo *AllocatedTypeInfo; 1382 1383 /// \brief If the allocated type was expressed as a parenthesized type-id, 1384 /// the source range covering the parenthesized type-id. 1385 SourceRange TypeIdParens; 1386 1387 SourceLocation StartLoc; 1388 SourceLocation EndLoc; 1389 SourceLocation ConstructorLParen; 1390 SourceLocation ConstructorRParen; 1391 1392 friend class ASTStmtReader; 1393public: 1394 CXXNewExpr(ASTContext &C, bool globalNew, FunctionDecl *operatorNew, 1395 Expr **placementArgs, unsigned numPlaceArgs, 1396 SourceRange TypeIdParens, 1397 Expr *arraySize, CXXConstructorDecl *constructor, bool initializer, 1398 Expr **constructorArgs, unsigned numConsArgs, 1399 bool HadMultipleCandidates, 1400 FunctionDecl *operatorDelete, bool usualArrayDeleteWantsSize, 1401 QualType ty, TypeSourceInfo *AllocatedTypeInfo, 1402 SourceLocation startLoc, SourceLocation endLoc, 1403 SourceLocation constructorLParen, 1404 SourceLocation constructorRParen); 1405 explicit CXXNewExpr(EmptyShell Shell) 1406 : Expr(CXXNewExprClass, Shell), SubExprs(0) { } 1407 1408 void AllocateArgsArray(ASTContext &C, bool isArray, unsigned numPlaceArgs, 1409 unsigned numConsArgs); 1410 1411 QualType getAllocatedType() const { 1412 assert(getType()->isPointerType()); 1413 return getType()->getAs<PointerType>()->getPointeeType(); 1414 } 1415 1416 TypeSourceInfo *getAllocatedTypeSourceInfo() const { 1417 return AllocatedTypeInfo; 1418 } 1419 1420 /// \brief True if the allocation result needs to be null-checked. 1421 /// C++0x [expr.new]p13: 1422 /// If the allocation function returns null, initialization shall 1423 /// not be done, the deallocation function shall not be called, 1424 /// and the value of the new-expression shall be null. 1425 /// An allocation function is not allowed to return null unless it 1426 /// has a non-throwing exception-specification. The '03 rule is 1427 /// identical except that the definition of a non-throwing 1428 /// exception specification is just "is it throw()?". 1429 bool shouldNullCheckAllocation(ASTContext &Ctx) const; 1430 1431 FunctionDecl *getOperatorNew() const { return OperatorNew; } 1432 void setOperatorNew(FunctionDecl *D) { OperatorNew = D; } 1433 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 1434 void setOperatorDelete(FunctionDecl *D) { OperatorDelete = D; } 1435 CXXConstructorDecl *getConstructor() const { return Constructor; } 1436 void setConstructor(CXXConstructorDecl *D) { Constructor = D; } 1437 1438 bool isArray() const { return Array; } 1439 Expr *getArraySize() { 1440 return Array ? cast<Expr>(SubExprs[0]) : 0; 1441 } 1442 const Expr *getArraySize() const { 1443 return Array ? cast<Expr>(SubExprs[0]) : 0; 1444 } 1445 1446 unsigned getNumPlacementArgs() const { return NumPlacementArgs; } 1447 Expr **getPlacementArgs() { 1448 return reinterpret_cast<Expr **>(SubExprs + Array); 1449 } 1450 1451 Expr *getPlacementArg(unsigned i) { 1452 assert(i < NumPlacementArgs && "Index out of range"); 1453 return cast<Expr>(SubExprs[Array + i]); 1454 } 1455 const Expr *getPlacementArg(unsigned i) const { 1456 assert(i < NumPlacementArgs && "Index out of range"); 1457 return cast<Expr>(SubExprs[Array + i]); 1458 } 1459 1460 bool isParenTypeId() const { return TypeIdParens.isValid(); } 1461 SourceRange getTypeIdParens() const { return TypeIdParens; } 1462 1463 bool isGlobalNew() const { return GlobalNew; } 1464 bool hasInitializer() const { return Initializer; } 1465 1466 /// Answers whether the usual array deallocation function for the 1467 /// allocated type expects the size of the allocation as a 1468 /// parameter. 1469 bool doesUsualArrayDeleteWantSize() const { 1470 return UsualArrayDeleteWantsSize; 1471 } 1472 1473 unsigned getNumConstructorArgs() const { return NumConstructorArgs; } 1474 1475 Expr **getConstructorArgs() { 1476 return reinterpret_cast<Expr **>(SubExprs + Array + NumPlacementArgs); 1477 } 1478 1479 Expr *getConstructorArg(unsigned i) { 1480 assert(i < NumConstructorArgs && "Index out of range"); 1481 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 1482 } 1483 const Expr *getConstructorArg(unsigned i) const { 1484 assert(i < NumConstructorArgs && "Index out of range"); 1485 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 1486 } 1487 1488 /// \brief Whether the new expression refers a constructor that was 1489 /// resolved from an overloaded set having size greater than 1. 1490 bool hadMultipleCandidates() const { return HadMultipleCandidates; } 1491 void setHadMultipleCandidates(bool V) { HadMultipleCandidates = V; } 1492 1493 typedef ExprIterator arg_iterator; 1494 typedef ConstExprIterator const_arg_iterator; 1495 1496 arg_iterator placement_arg_begin() { 1497 return SubExprs + Array; 1498 } 1499 arg_iterator placement_arg_end() { 1500 return SubExprs + Array + getNumPlacementArgs(); 1501 } 1502 const_arg_iterator placement_arg_begin() const { 1503 return SubExprs + Array; 1504 } 1505 const_arg_iterator placement_arg_end() const { 1506 return SubExprs + Array + getNumPlacementArgs(); 1507 } 1508 1509 arg_iterator constructor_arg_begin() { 1510 return SubExprs + Array + getNumPlacementArgs(); 1511 } 1512 arg_iterator constructor_arg_end() { 1513 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 1514 } 1515 const_arg_iterator constructor_arg_begin() const { 1516 return SubExprs + Array + getNumPlacementArgs(); 1517 } 1518 const_arg_iterator constructor_arg_end() const { 1519 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 1520 } 1521 1522 typedef Stmt **raw_arg_iterator; 1523 raw_arg_iterator raw_arg_begin() { return SubExprs; } 1524 raw_arg_iterator raw_arg_end() { 1525 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 1526 } 1527 const_arg_iterator raw_arg_begin() const { return SubExprs; } 1528 const_arg_iterator raw_arg_end() const { return constructor_arg_end(); } 1529 1530 SourceLocation getStartLoc() const { return StartLoc; } 1531 SourceLocation getEndLoc() const { return EndLoc; } 1532 1533 SourceLocation getConstructorLParen() const { return ConstructorLParen; } 1534 SourceLocation getConstructorRParen() const { return ConstructorRParen; } 1535 1536 SourceRange getSourceRange() const { 1537 return SourceRange(StartLoc, EndLoc); 1538 } 1539 1540 static bool classof(const Stmt *T) { 1541 return T->getStmtClass() == CXXNewExprClass; 1542 } 1543 static bool classof(const CXXNewExpr *) { return true; } 1544 1545 // Iterators 1546 child_range children() { 1547 return child_range(&SubExprs[0], 1548 &SubExprs[0] + Array + getNumPlacementArgs() 1549 + getNumConstructorArgs()); 1550 } 1551}; 1552 1553/// CXXDeleteExpr - A delete expression for memory deallocation and destructor 1554/// calls, e.g. "delete[] pArray". 1555class CXXDeleteExpr : public Expr { 1556 // Is this a forced global delete, i.e. "::delete"? 1557 bool GlobalDelete : 1; 1558 // Is this the array form of delete, i.e. "delete[]"? 1559 bool ArrayForm : 1; 1560 // ArrayFormAsWritten can be different from ArrayForm if 'delete' is applied 1561 // to pointer-to-array type (ArrayFormAsWritten will be false while ArrayForm 1562 // will be true). 1563 bool ArrayFormAsWritten : 1; 1564 // Does the usual deallocation function for the element type require 1565 // a size_t argument? 1566 bool UsualArrayDeleteWantsSize : 1; 1567 // Points to the operator delete overload that is used. Could be a member. 1568 FunctionDecl *OperatorDelete; 1569 // The pointer expression to be deleted. 1570 Stmt *Argument; 1571 // Location of the expression. 1572 SourceLocation Loc; 1573public: 1574 CXXDeleteExpr(QualType ty, bool globalDelete, bool arrayForm, 1575 bool arrayFormAsWritten, bool usualArrayDeleteWantsSize, 1576 FunctionDecl *operatorDelete, Expr *arg, SourceLocation loc) 1577 : Expr(CXXDeleteExprClass, ty, VK_RValue, OK_Ordinary, false, false, 1578 arg->isInstantiationDependent(), 1579 arg->containsUnexpandedParameterPack()), 1580 GlobalDelete(globalDelete), 1581 ArrayForm(arrayForm), ArrayFormAsWritten(arrayFormAsWritten), 1582 UsualArrayDeleteWantsSize(usualArrayDeleteWantsSize), 1583 OperatorDelete(operatorDelete), Argument(arg), Loc(loc) { } 1584 explicit CXXDeleteExpr(EmptyShell Shell) 1585 : Expr(CXXDeleteExprClass, Shell), OperatorDelete(0), Argument(0) { } 1586 1587 bool isGlobalDelete() const { return GlobalDelete; } 1588 bool isArrayForm() const { return ArrayForm; } 1589 bool isArrayFormAsWritten() const { return ArrayFormAsWritten; } 1590 1591 /// Answers whether the usual array deallocation function for the 1592 /// allocated type expects the size of the allocation as a 1593 /// parameter. This can be true even if the actual deallocation 1594 /// function that we're using doesn't want a size. 1595 bool doesUsualArrayDeleteWantSize() const { 1596 return UsualArrayDeleteWantsSize; 1597 } 1598 1599 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 1600 1601 Expr *getArgument() { return cast<Expr>(Argument); } 1602 const Expr *getArgument() const { return cast<Expr>(Argument); } 1603 1604 /// \brief Retrieve the type being destroyed. If the type being 1605 /// destroyed is a dependent type which may or may not be a pointer, 1606 /// return an invalid type. 1607 QualType getDestroyedType() const; 1608 1609 SourceRange getSourceRange() const { 1610 return SourceRange(Loc, Argument->getLocEnd()); 1611 } 1612 1613 static bool classof(const Stmt *T) { 1614 return T->getStmtClass() == CXXDeleteExprClass; 1615 } 1616 static bool classof(const CXXDeleteExpr *) { return true; } 1617 1618 // Iterators 1619 child_range children() { return child_range(&Argument, &Argument+1); } 1620 1621 friend class ASTStmtReader; 1622}; 1623 1624/// \brief Structure used to store the type being destroyed by a 1625/// pseudo-destructor expression. 1626class PseudoDestructorTypeStorage { 1627 /// \brief Either the type source information or the name of the type, if 1628 /// it couldn't be resolved due to type-dependence. 1629 llvm::PointerUnion<TypeSourceInfo *, IdentifierInfo *> Type; 1630 1631 /// \brief The starting source location of the pseudo-destructor type. 1632 SourceLocation Location; 1633 1634public: 1635 PseudoDestructorTypeStorage() { } 1636 1637 PseudoDestructorTypeStorage(IdentifierInfo *II, SourceLocation Loc) 1638 : Type(II), Location(Loc) { } 1639 1640 PseudoDestructorTypeStorage(TypeSourceInfo *Info); 1641 1642 TypeSourceInfo *getTypeSourceInfo() const { 1643 return Type.dyn_cast<TypeSourceInfo *>(); 1644 } 1645 1646 IdentifierInfo *getIdentifier() const { 1647 return Type.dyn_cast<IdentifierInfo *>(); 1648 } 1649 1650 SourceLocation getLocation() const { return Location; } 1651}; 1652 1653/// \brief Represents a C++ pseudo-destructor (C++ [expr.pseudo]). 1654/// 1655/// A pseudo-destructor is an expression that looks like a member access to a 1656/// destructor of a scalar type, except that scalar types don't have 1657/// destructors. For example: 1658/// 1659/// \code 1660/// typedef int T; 1661/// void f(int *p) { 1662/// p->T::~T(); 1663/// } 1664/// \endcode 1665/// 1666/// Pseudo-destructors typically occur when instantiating templates such as: 1667/// 1668/// \code 1669/// template<typename T> 1670/// void destroy(T* ptr) { 1671/// ptr->T::~T(); 1672/// } 1673/// \endcode 1674/// 1675/// for scalar types. A pseudo-destructor expression has no run-time semantics 1676/// beyond evaluating the base expression. 1677class CXXPseudoDestructorExpr : public Expr { 1678 /// \brief The base expression (that is being destroyed). 1679 Stmt *Base; 1680 1681 /// \brief Whether the operator was an arrow ('->'); otherwise, it was a 1682 /// period ('.'). 1683 bool IsArrow : 1; 1684 1685 /// \brief The location of the '.' or '->' operator. 1686 SourceLocation OperatorLoc; 1687 1688 /// \brief The nested-name-specifier that follows the operator, if present. 1689 NestedNameSpecifierLoc QualifierLoc; 1690 1691 /// \brief The type that precedes the '::' in a qualified pseudo-destructor 1692 /// expression. 1693 TypeSourceInfo *ScopeType; 1694 1695 /// \brief The location of the '::' in a qualified pseudo-destructor 1696 /// expression. 1697 SourceLocation ColonColonLoc; 1698 1699 /// \brief The location of the '~'. 1700 SourceLocation TildeLoc; 1701 1702 /// \brief The type being destroyed, or its name if we were unable to 1703 /// resolve the name. 1704 PseudoDestructorTypeStorage DestroyedType; 1705 1706 friend class ASTStmtReader; 1707 1708public: 1709 CXXPseudoDestructorExpr(ASTContext &Context, 1710 Expr *Base, bool isArrow, SourceLocation OperatorLoc, 1711 NestedNameSpecifierLoc QualifierLoc, 1712 TypeSourceInfo *ScopeType, 1713 SourceLocation ColonColonLoc, 1714 SourceLocation TildeLoc, 1715 PseudoDestructorTypeStorage DestroyedType); 1716 1717 explicit CXXPseudoDestructorExpr(EmptyShell Shell) 1718 : Expr(CXXPseudoDestructorExprClass, Shell), 1719 Base(0), IsArrow(false), QualifierLoc(), ScopeType(0) { } 1720 1721 Expr *getBase() const { return cast<Expr>(Base); } 1722 1723 /// \brief Determines whether this member expression actually had 1724 /// a C++ nested-name-specifier prior to the name of the member, e.g., 1725 /// x->Base::foo. 1726 bool hasQualifier() const { return QualifierLoc; } 1727 1728 /// \brief Retrieves the nested-name-specifier that qualifies the type name, 1729 /// with source-location information. 1730 NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } 1731 1732 /// \brief If the member name was qualified, retrieves the 1733 /// nested-name-specifier that precedes the member name. Otherwise, returns 1734 /// NULL. 1735 NestedNameSpecifier *getQualifier() const { 1736 return QualifierLoc.getNestedNameSpecifier(); 1737 } 1738 1739 /// \brief Determine whether this pseudo-destructor expression was written 1740 /// using an '->' (otherwise, it used a '.'). 1741 bool isArrow() const { return IsArrow; } 1742 1743 /// \brief Retrieve the location of the '.' or '->' operator. 1744 SourceLocation getOperatorLoc() const { return OperatorLoc; } 1745 1746 /// \brief Retrieve the scope type in a qualified pseudo-destructor 1747 /// expression. 1748 /// 1749 /// Pseudo-destructor expressions can have extra qualification within them 1750 /// that is not part of the nested-name-specifier, e.g., \c p->T::~T(). 1751 /// Here, if the object type of the expression is (or may be) a scalar type, 1752 /// \p T may also be a scalar type and, therefore, cannot be part of a 1753 /// nested-name-specifier. It is stored as the "scope type" of the pseudo- 1754 /// destructor expression. 1755 TypeSourceInfo *getScopeTypeInfo() const { return ScopeType; } 1756 1757 /// \brief Retrieve the location of the '::' in a qualified pseudo-destructor 1758 /// expression. 1759 SourceLocation getColonColonLoc() const { return ColonColonLoc; } 1760 1761 /// \brief Retrieve the location of the '~'. 1762 SourceLocation getTildeLoc() const { return TildeLoc; } 1763 1764 /// \brief Retrieve the source location information for the type 1765 /// being destroyed. 1766 /// 1767 /// This type-source information is available for non-dependent 1768 /// pseudo-destructor expressions and some dependent pseudo-destructor 1769 /// expressions. Returns NULL if we only have the identifier for a 1770 /// dependent pseudo-destructor expression. 1771 TypeSourceInfo *getDestroyedTypeInfo() const { 1772 return DestroyedType.getTypeSourceInfo(); 1773 } 1774 1775 /// \brief In a dependent pseudo-destructor expression for which we do not 1776 /// have full type information on the destroyed type, provides the name 1777 /// of the destroyed type. 1778 IdentifierInfo *getDestroyedTypeIdentifier() const { 1779 return DestroyedType.getIdentifier(); 1780 } 1781 1782 /// \brief Retrieve the type being destroyed. 1783 QualType getDestroyedType() const; 1784 1785 /// \brief Retrieve the starting location of the type being destroyed. 1786 SourceLocation getDestroyedTypeLoc() const { 1787 return DestroyedType.getLocation(); 1788 } 1789 1790 /// \brief Set the name of destroyed type for a dependent pseudo-destructor 1791 /// expression. 1792 void setDestroyedType(IdentifierInfo *II, SourceLocation Loc) { 1793 DestroyedType = PseudoDestructorTypeStorage(II, Loc); 1794 } 1795 1796 /// \brief Set the destroyed type. 1797 void setDestroyedType(TypeSourceInfo *Info) { 1798 DestroyedType = PseudoDestructorTypeStorage(Info); 1799 } 1800 1801 SourceRange getSourceRange() const; 1802 1803 static bool classof(const Stmt *T) { 1804 return T->getStmtClass() == CXXPseudoDestructorExprClass; 1805 } 1806 static bool classof(const CXXPseudoDestructorExpr *) { return true; } 1807 1808 // Iterators 1809 child_range children() { return child_range(&Base, &Base + 1); } 1810}; 1811 1812/// UnaryTypeTraitExpr - A GCC or MS unary type trait, as used in the 1813/// implementation of TR1/C++0x type trait templates. 1814/// Example: 1815/// __is_pod(int) == true 1816/// __is_enum(std::string) == false 1817class UnaryTypeTraitExpr : public Expr { 1818 /// UTT - The trait. A UnaryTypeTrait enum in MSVC compat unsigned. 1819 unsigned UTT : 31; 1820 /// The value of the type trait. Unspecified if dependent. 1821 bool Value : 1; 1822 1823 /// Loc - The location of the type trait keyword. 1824 SourceLocation Loc; 1825 1826 /// RParen - The location of the closing paren. 1827 SourceLocation RParen; 1828 1829 /// The type being queried. 1830 TypeSourceInfo *QueriedType; 1831 1832public: 1833 UnaryTypeTraitExpr(SourceLocation loc, UnaryTypeTrait utt, 1834 TypeSourceInfo *queried, bool value, 1835 SourceLocation rparen, QualType ty) 1836 : Expr(UnaryTypeTraitExprClass, ty, VK_RValue, OK_Ordinary, 1837 false, queried->getType()->isDependentType(), 1838 queried->getType()->isInstantiationDependentType(), 1839 queried->getType()->containsUnexpandedParameterPack()), 1840 UTT(utt), Value(value), Loc(loc), RParen(rparen), QueriedType(queried) { } 1841 1842 explicit UnaryTypeTraitExpr(EmptyShell Empty) 1843 : Expr(UnaryTypeTraitExprClass, Empty), UTT(0), Value(false), 1844 QueriedType() { } 1845 1846 SourceRange getSourceRange() const { return SourceRange(Loc, RParen);} 1847 1848 UnaryTypeTrait getTrait() const { return static_cast<UnaryTypeTrait>(UTT); } 1849 1850 QualType getQueriedType() const { return QueriedType->getType(); } 1851 1852 TypeSourceInfo *getQueriedTypeSourceInfo() const { return QueriedType; } 1853 1854 bool getValue() const { return Value; } 1855 1856 static bool classof(const Stmt *T) { 1857 return T->getStmtClass() == UnaryTypeTraitExprClass; 1858 } 1859 static bool classof(const UnaryTypeTraitExpr *) { return true; } 1860 1861 // Iterators 1862 child_range children() { return child_range(); } 1863 1864 friend class ASTStmtReader; 1865}; 1866 1867/// BinaryTypeTraitExpr - A GCC or MS binary type trait, as used in the 1868/// implementation of TR1/C++0x type trait templates. 1869/// Example: 1870/// __is_base_of(Base, Derived) == true 1871class BinaryTypeTraitExpr : public Expr { 1872 /// BTT - The trait. A BinaryTypeTrait enum in MSVC compat unsigned. 1873 unsigned BTT : 8; 1874 1875 /// The value of the type trait. Unspecified if dependent. 1876 bool Value : 1; 1877 1878 /// Loc - The location of the type trait keyword. 1879 SourceLocation Loc; 1880 1881 /// RParen - The location of the closing paren. 1882 SourceLocation RParen; 1883 1884 /// The lhs type being queried. 1885 TypeSourceInfo *LhsType; 1886 1887 /// The rhs type being queried. 1888 TypeSourceInfo *RhsType; 1889 1890public: 1891 BinaryTypeTraitExpr(SourceLocation loc, BinaryTypeTrait btt, 1892 TypeSourceInfo *lhsType, TypeSourceInfo *rhsType, 1893 bool value, SourceLocation rparen, QualType ty) 1894 : Expr(BinaryTypeTraitExprClass, ty, VK_RValue, OK_Ordinary, false, 1895 lhsType->getType()->isDependentType() || 1896 rhsType->getType()->isDependentType(), 1897 (lhsType->getType()->isInstantiationDependentType() || 1898 rhsType->getType()->isInstantiationDependentType()), 1899 (lhsType->getType()->containsUnexpandedParameterPack() || 1900 rhsType->getType()->containsUnexpandedParameterPack())), 1901 BTT(btt), Value(value), Loc(loc), RParen(rparen), 1902 LhsType(lhsType), RhsType(rhsType) { } 1903 1904 1905 explicit BinaryTypeTraitExpr(EmptyShell Empty) 1906 : Expr(BinaryTypeTraitExprClass, Empty), BTT(0), Value(false), 1907 LhsType(), RhsType() { } 1908 1909 SourceRange getSourceRange() const { 1910 return SourceRange(Loc, RParen); 1911 } 1912 1913 BinaryTypeTrait getTrait() const { 1914 return static_cast<BinaryTypeTrait>(BTT); 1915 } 1916 1917 QualType getLhsType() const { return LhsType->getType(); } 1918 QualType getRhsType() const { return RhsType->getType(); } 1919 1920 TypeSourceInfo *getLhsTypeSourceInfo() const { return LhsType; } 1921 TypeSourceInfo *getRhsTypeSourceInfo() const { return RhsType; } 1922 1923 bool getValue() const { assert(!isTypeDependent()); return Value; } 1924 1925 static bool classof(const Stmt *T) { 1926 return T->getStmtClass() == BinaryTypeTraitExprClass; 1927 } 1928 static bool classof(const BinaryTypeTraitExpr *) { return true; } 1929 1930 // Iterators 1931 child_range children() { return child_range(); } 1932 1933 friend class ASTStmtReader; 1934}; 1935 1936/// ArrayTypeTraitExpr - An Embarcadero array type trait, as used in the 1937/// implementation of __array_rank and __array_extent. 1938/// Example: 1939/// __array_rank(int[10][20]) == 2 1940/// __array_extent(int, 1) == 20 1941class ArrayTypeTraitExpr : public Expr { 1942 virtual void anchor(); 1943 1944 /// ATT - The trait. An ArrayTypeTrait enum in MSVC compat unsigned. 1945 unsigned ATT : 2; 1946 1947 /// The value of the type trait. Unspecified if dependent. 1948 uint64_t Value; 1949 1950 /// The array dimension being queried, or -1 if not used 1951 Expr *Dimension; 1952 1953 /// Loc - The location of the type trait keyword. 1954 SourceLocation Loc; 1955 1956 /// RParen - The location of the closing paren. 1957 SourceLocation RParen; 1958 1959 /// The type being queried. 1960 TypeSourceInfo *QueriedType; 1961 1962public: 1963 ArrayTypeTraitExpr(SourceLocation loc, ArrayTypeTrait att, 1964 TypeSourceInfo *queried, uint64_t value, 1965 Expr *dimension, SourceLocation rparen, QualType ty) 1966 : Expr(ArrayTypeTraitExprClass, ty, VK_RValue, OK_Ordinary, 1967 false, queried->getType()->isDependentType(), 1968 (queried->getType()->isInstantiationDependentType() || 1969 (dimension && dimension->isInstantiationDependent())), 1970 queried->getType()->containsUnexpandedParameterPack()), 1971 ATT(att), Value(value), Dimension(dimension), 1972 Loc(loc), RParen(rparen), QueriedType(queried) { } 1973 1974 1975 explicit ArrayTypeTraitExpr(EmptyShell Empty) 1976 : Expr(ArrayTypeTraitExprClass, Empty), ATT(0), Value(false), 1977 QueriedType() { } 1978 1979 virtual ~ArrayTypeTraitExpr() { } 1980 1981 virtual SourceRange getSourceRange() const { 1982 return SourceRange(Loc, RParen); 1983 } 1984 1985 ArrayTypeTrait getTrait() const { return static_cast<ArrayTypeTrait>(ATT); } 1986 1987 QualType getQueriedType() const { return QueriedType->getType(); } 1988 1989 TypeSourceInfo *getQueriedTypeSourceInfo() const { return QueriedType; } 1990 1991 uint64_t getValue() const { assert(!isTypeDependent()); return Value; } 1992 1993 Expr *getDimensionExpression() const { return Dimension; } 1994 1995 static bool classof(const Stmt *T) { 1996 return T->getStmtClass() == ArrayTypeTraitExprClass; 1997 } 1998 static bool classof(const ArrayTypeTraitExpr *) { return true; } 1999 2000 // Iterators 2001 child_range children() { return child_range(); } 2002 2003 friend class ASTStmtReader; 2004}; 2005 2006/// ExpressionTraitExpr - An expression trait intrinsic 2007/// Example: 2008/// __is_lvalue_expr(std::cout) == true 2009/// __is_lvalue_expr(1) == false 2010class ExpressionTraitExpr : public Expr { 2011 /// ET - The trait. A ExpressionTrait enum in MSVC compat unsigned. 2012 unsigned ET : 31; 2013 /// The value of the type trait. Unspecified if dependent. 2014 bool Value : 1; 2015 2016 /// Loc - The location of the type trait keyword. 2017 SourceLocation Loc; 2018 2019 /// RParen - The location of the closing paren. 2020 SourceLocation RParen; 2021 2022 Expr* QueriedExpression; 2023public: 2024 ExpressionTraitExpr(SourceLocation loc, ExpressionTrait et, 2025 Expr *queried, bool value, 2026 SourceLocation rparen, QualType resultType) 2027 : Expr(ExpressionTraitExprClass, resultType, VK_RValue, OK_Ordinary, 2028 false, // Not type-dependent 2029 // Value-dependent if the argument is type-dependent. 2030 queried->isTypeDependent(), 2031 queried->isInstantiationDependent(), 2032 queried->containsUnexpandedParameterPack()), 2033 ET(et), Value(value), Loc(loc), RParen(rparen), 2034 QueriedExpression(queried) { } 2035 2036 explicit ExpressionTraitExpr(EmptyShell Empty) 2037 : Expr(ExpressionTraitExprClass, Empty), ET(0), Value(false), 2038 QueriedExpression() { } 2039 2040 SourceRange getSourceRange() const { return SourceRange(Loc, RParen);} 2041 2042 ExpressionTrait getTrait() const { return static_cast<ExpressionTrait>(ET); } 2043 2044 Expr *getQueriedExpression() const { return QueriedExpression; } 2045 2046 bool getValue() const { return Value; } 2047 2048 static bool classof(const Stmt *T) { 2049 return T->getStmtClass() == ExpressionTraitExprClass; 2050 } 2051 static bool classof(const ExpressionTraitExpr *) { return true; } 2052 2053 // Iterators 2054 child_range children() { return child_range(); } 2055 2056 friend class ASTStmtReader; 2057}; 2058 2059 2060/// \brief A reference to an overloaded function set, either an 2061/// \t UnresolvedLookupExpr or an \t UnresolvedMemberExpr. 2062class OverloadExpr : public Expr { 2063 /// The results. These are undesugared, which is to say, they may 2064 /// include UsingShadowDecls. Access is relative to the naming 2065 /// class. 2066 // FIXME: Allocate this data after the OverloadExpr subclass. 2067 DeclAccessPair *Results; 2068 unsigned NumResults; 2069 2070 /// The common name of these declarations. 2071 DeclarationNameInfo NameInfo; 2072 2073 /// \brief The nested-name-specifier that qualifies the name, if any. 2074 NestedNameSpecifierLoc QualifierLoc; 2075 2076protected: 2077 /// \brief Whether the name includes info for explicit template 2078 /// keyword and arguments. 2079 bool HasTemplateKWAndArgsInfo; 2080 2081 /// \brief Return the optional template keyword and arguments info. 2082 ASTTemplateKWAndArgsInfo *getTemplateKWAndArgsInfo(); // defined far below. 2083 2084 /// \brief Return the optional template keyword and arguments info. 2085 const ASTTemplateKWAndArgsInfo *getTemplateKWAndArgsInfo() const { 2086 return const_cast<OverloadExpr*>(this)->getTemplateKWAndArgsInfo(); 2087 } 2088 2089 OverloadExpr(StmtClass K, ASTContext &C, 2090 NestedNameSpecifierLoc QualifierLoc, 2091 SourceLocation TemplateKWLoc, 2092 const DeclarationNameInfo &NameInfo, 2093 const TemplateArgumentListInfo *TemplateArgs, 2094 UnresolvedSetIterator Begin, UnresolvedSetIterator End, 2095 bool KnownDependent, 2096 bool KnownInstantiationDependent, 2097 bool KnownContainsUnexpandedParameterPack); 2098 2099 OverloadExpr(StmtClass K, EmptyShell Empty) 2100 : Expr(K, Empty), Results(0), NumResults(0), 2101 QualifierLoc(), HasTemplateKWAndArgsInfo(false) { } 2102 2103 void initializeResults(ASTContext &C, 2104 UnresolvedSetIterator Begin, 2105 UnresolvedSetIterator End); 2106 2107public: 2108 struct FindResult { 2109 OverloadExpr *Expression; 2110 bool IsAddressOfOperand; 2111 bool HasFormOfMemberPointer; 2112 }; 2113 2114 /// Finds the overloaded expression in the given expression of 2115 /// OverloadTy. 2116 /// 2117 /// \return the expression (which must be there) and true if it has 2118 /// the particular form of a member pointer expression 2119 static FindResult find(Expr *E) { 2120 assert(E->getType()->isSpecificBuiltinType(BuiltinType::Overload)); 2121 2122 FindResult Result; 2123 2124 E = E->IgnoreParens(); 2125 if (isa<UnaryOperator>(E)) { 2126 assert(cast<UnaryOperator>(E)->getOpcode() == UO_AddrOf); 2127 E = cast<UnaryOperator>(E)->getSubExpr(); 2128 OverloadExpr *Ovl = cast<OverloadExpr>(E->IgnoreParens()); 2129 2130 Result.HasFormOfMemberPointer = (E == Ovl && Ovl->getQualifier()); 2131 Result.IsAddressOfOperand = true; 2132 Result.Expression = Ovl; 2133 } else { 2134 Result.HasFormOfMemberPointer = false; 2135 Result.IsAddressOfOperand = false; 2136 Result.Expression = cast<OverloadExpr>(E); 2137 } 2138 2139 return Result; 2140 } 2141 2142 /// Gets the naming class of this lookup, if any. 2143 CXXRecordDecl *getNamingClass() const; 2144 2145 typedef UnresolvedSetImpl::iterator decls_iterator; 2146 decls_iterator decls_begin() const { return UnresolvedSetIterator(Results); } 2147 decls_iterator decls_end() const { 2148 return UnresolvedSetIterator(Results + NumResults); 2149 } 2150 2151 /// Gets the number of declarations in the unresolved set. 2152 unsigned getNumDecls() const { return NumResults; } 2153 2154 /// Gets the full name info. 2155 const DeclarationNameInfo &getNameInfo() const { return NameInfo; } 2156 2157 /// Gets the name looked up. 2158 DeclarationName getName() const { return NameInfo.getName(); } 2159 2160 /// Gets the location of the name. 2161 SourceLocation getNameLoc() const { return NameInfo.getLoc(); } 2162 2163 /// Fetches the nested-name qualifier, if one was given. 2164 NestedNameSpecifier *getQualifier() const { 2165 return QualifierLoc.getNestedNameSpecifier(); 2166 } 2167 2168 /// Fetches the nested-name qualifier with source-location information, if 2169 /// one was given. 2170 NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } 2171 2172 /// \brief Retrieve the location of the template keyword preceding 2173 /// this name, if any. 2174 SourceLocation getTemplateKeywordLoc() const { 2175 if (!HasTemplateKWAndArgsInfo) return SourceLocation(); 2176 return getTemplateKWAndArgsInfo()->getTemplateKeywordLoc(); 2177 } 2178 2179 /// \brief Retrieve the location of the left angle bracket starting the 2180 /// explicit template argument list following the name, if any. 2181 SourceLocation getLAngleLoc() const { 2182 if (!HasTemplateKWAndArgsInfo) return SourceLocation(); 2183 return getTemplateKWAndArgsInfo()->LAngleLoc; 2184 } 2185 2186 /// \brief Retrieve the location of the right angle bracket ending the 2187 /// explicit template argument list following the name, if any. 2188 SourceLocation getRAngleLoc() const { 2189 if (!HasTemplateKWAndArgsInfo) return SourceLocation(); 2190 return getTemplateKWAndArgsInfo()->RAngleLoc; 2191 } 2192 2193 /// Determines whether the name was preceded by the template keyword. 2194 bool hasTemplateKeyword() const { return getTemplateKeywordLoc().isValid(); } 2195 2196 /// Determines whether this expression had explicit template arguments. 2197 bool hasExplicitTemplateArgs() const { return getLAngleLoc().isValid(); } 2198 2199 // Note that, inconsistently with the explicit-template-argument AST 2200 // nodes, users are *forbidden* from calling these methods on objects 2201 // without explicit template arguments. 2202 2203 ASTTemplateArgumentListInfo &getExplicitTemplateArgs() { 2204 assert(hasExplicitTemplateArgs()); 2205 return *getTemplateKWAndArgsInfo(); 2206 } 2207 2208 const ASTTemplateArgumentListInfo &getExplicitTemplateArgs() const { 2209 return const_cast<OverloadExpr*>(this)->getExplicitTemplateArgs(); 2210 } 2211 2212 TemplateArgumentLoc const *getTemplateArgs() const { 2213 return getExplicitTemplateArgs().getTemplateArgs(); 2214 } 2215 2216 unsigned getNumTemplateArgs() const { 2217 return getExplicitTemplateArgs().NumTemplateArgs; 2218 } 2219 2220 /// Copies the template arguments into the given structure. 2221 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 2222 getExplicitTemplateArgs().copyInto(List); 2223 } 2224 2225 /// \brief Retrieves the optional explicit template arguments. 2226 /// This points to the same data as getExplicitTemplateArgs(), but 2227 /// returns null if there are no explicit template arguments. 2228 const ASTTemplateArgumentListInfo *getOptionalExplicitTemplateArgs() { 2229 if (!hasExplicitTemplateArgs()) return 0; 2230 return &getExplicitTemplateArgs(); 2231 } 2232 2233 static bool classof(const Stmt *T) { 2234 return T->getStmtClass() == UnresolvedLookupExprClass || 2235 T->getStmtClass() == UnresolvedMemberExprClass; 2236 } 2237 static bool classof(const OverloadExpr *) { return true; } 2238 2239 friend class ASTStmtReader; 2240 friend class ASTStmtWriter; 2241}; 2242 2243/// \brief A reference to a name which we were able to look up during 2244/// parsing but could not resolve to a specific declaration. This 2245/// arises in several ways: 2246/// * we might be waiting for argument-dependent lookup 2247/// * the name might resolve to an overloaded function 2248/// and eventually: 2249/// * the lookup might have included a function template 2250/// These never include UnresolvedUsingValueDecls, which are always 2251/// class members and therefore appear only in 2252/// UnresolvedMemberLookupExprs. 2253class UnresolvedLookupExpr : public OverloadExpr { 2254 /// True if these lookup results should be extended by 2255 /// argument-dependent lookup if this is the operand of a function 2256 /// call. 2257 bool RequiresADL; 2258 2259 /// True if namespace ::std should be considered an associated namespace 2260 /// for the purposes of argument-dependent lookup. See C++0x [stmt.ranged]p1. 2261 bool StdIsAssociatedNamespace; 2262 2263 /// True if these lookup results are overloaded. This is pretty 2264 /// trivially rederivable if we urgently need to kill this field. 2265 bool Overloaded; 2266 2267 /// The naming class (C++ [class.access.base]p5) of the lookup, if 2268 /// any. This can generally be recalculated from the context chain, 2269 /// but that can be fairly expensive for unqualified lookups. If we 2270 /// want to improve memory use here, this could go in a union 2271 /// against the qualified-lookup bits. 2272 CXXRecordDecl *NamingClass; 2273 2274 UnresolvedLookupExpr(ASTContext &C, 2275 CXXRecordDecl *NamingClass, 2276 NestedNameSpecifierLoc QualifierLoc, 2277 SourceLocation TemplateKWLoc, 2278 const DeclarationNameInfo &NameInfo, 2279 bool RequiresADL, bool Overloaded, 2280 const TemplateArgumentListInfo *TemplateArgs, 2281 UnresolvedSetIterator Begin, UnresolvedSetIterator End, 2282 bool StdIsAssociatedNamespace) 2283 : OverloadExpr(UnresolvedLookupExprClass, C, QualifierLoc, TemplateKWLoc, 2284 NameInfo, TemplateArgs, Begin, End, false, false, false), 2285 RequiresADL(RequiresADL), 2286 StdIsAssociatedNamespace(StdIsAssociatedNamespace), 2287 Overloaded(Overloaded), NamingClass(NamingClass) 2288 {} 2289 2290 UnresolvedLookupExpr(EmptyShell Empty) 2291 : OverloadExpr(UnresolvedLookupExprClass, Empty), 2292 RequiresADL(false), StdIsAssociatedNamespace(false), Overloaded(false), 2293 NamingClass(0) 2294 {} 2295 2296 friend class ASTStmtReader; 2297 2298public: 2299 static UnresolvedLookupExpr *Create(ASTContext &C, 2300 CXXRecordDecl *NamingClass, 2301 NestedNameSpecifierLoc QualifierLoc, 2302 const DeclarationNameInfo &NameInfo, 2303 bool ADL, bool Overloaded, 2304 UnresolvedSetIterator Begin, 2305 UnresolvedSetIterator End, 2306 bool StdIsAssociatedNamespace = false) { 2307 assert((ADL || !StdIsAssociatedNamespace) && 2308 "std considered associated namespace when not performing ADL"); 2309 return new(C) UnresolvedLookupExpr(C, NamingClass, QualifierLoc, 2310 SourceLocation(), NameInfo, 2311 ADL, Overloaded, 0, Begin, End, 2312 StdIsAssociatedNamespace); 2313 } 2314 2315 static UnresolvedLookupExpr *Create(ASTContext &C, 2316 CXXRecordDecl *NamingClass, 2317 NestedNameSpecifierLoc QualifierLoc, 2318 SourceLocation TemplateKWLoc, 2319 const DeclarationNameInfo &NameInfo, 2320 bool ADL, 2321 const TemplateArgumentListInfo *Args, 2322 UnresolvedSetIterator Begin, 2323 UnresolvedSetIterator End); 2324 2325 static UnresolvedLookupExpr *CreateEmpty(ASTContext &C, 2326 bool HasTemplateKWAndArgsInfo, 2327 unsigned NumTemplateArgs); 2328 2329 /// True if this declaration should be extended by 2330 /// argument-dependent lookup. 2331 bool requiresADL() const { return RequiresADL; } 2332 2333 /// True if namespace ::std should be artificially added to the set of 2334 /// associated namespaecs for argument-dependent lookup purposes. 2335 bool isStdAssociatedNamespace() const { return StdIsAssociatedNamespace; } 2336 2337 /// True if this lookup is overloaded. 2338 bool isOverloaded() const { return Overloaded; } 2339 2340 /// Gets the 'naming class' (in the sense of C++0x 2341 /// [class.access.base]p5) of the lookup. This is the scope 2342 /// that was looked in to find these results. 2343 CXXRecordDecl *getNamingClass() const { return NamingClass; } 2344 2345 SourceRange getSourceRange() const { 2346 SourceRange Range(getNameInfo().getSourceRange()); 2347 if (getQualifierLoc()) 2348 Range.setBegin(getQualifierLoc().getBeginLoc()); 2349 if (hasExplicitTemplateArgs()) 2350 Range.setEnd(getRAngleLoc()); 2351 return Range; 2352 } 2353 2354 child_range children() { return child_range(); } 2355 2356 static bool classof(const Stmt *T) { 2357 return T->getStmtClass() == UnresolvedLookupExprClass; 2358 } 2359 static bool classof(const UnresolvedLookupExpr *) { return true; } 2360}; 2361 2362/// \brief A qualified reference to a name whose declaration cannot 2363/// yet be resolved. 2364/// 2365/// DependentScopeDeclRefExpr is similar to DeclRefExpr in that 2366/// it expresses a reference to a declaration such as 2367/// X<T>::value. The difference, however, is that an 2368/// DependentScopeDeclRefExpr node is used only within C++ templates when 2369/// the qualification (e.g., X<T>::) refers to a dependent type. In 2370/// this case, X<T>::value cannot resolve to a declaration because the 2371/// declaration will differ from on instantiation of X<T> to the 2372/// next. Therefore, DependentScopeDeclRefExpr keeps track of the 2373/// qualifier (X<T>::) and the name of the entity being referenced 2374/// ("value"). Such expressions will instantiate to a DeclRefExpr once the 2375/// declaration can be found. 2376class DependentScopeDeclRefExpr : public Expr { 2377 /// \brief The nested-name-specifier that qualifies this unresolved 2378 /// declaration name. 2379 NestedNameSpecifierLoc QualifierLoc; 2380 2381 /// The name of the entity we will be referencing. 2382 DeclarationNameInfo NameInfo; 2383 2384 /// \brief Whether the name includes info for explicit template 2385 /// keyword and arguments. 2386 bool HasTemplateKWAndArgsInfo; 2387 2388 /// \brief Return the optional template keyword and arguments info. 2389 ASTTemplateKWAndArgsInfo *getTemplateKWAndArgsInfo() { 2390 if (!HasTemplateKWAndArgsInfo) return 0; 2391 return reinterpret_cast<ASTTemplateKWAndArgsInfo*>(this + 1); 2392 } 2393 /// \brief Return the optional template keyword and arguments info. 2394 const ASTTemplateKWAndArgsInfo *getTemplateKWAndArgsInfo() const { 2395 return const_cast<DependentScopeDeclRefExpr*>(this) 2396 ->getTemplateKWAndArgsInfo(); 2397 } 2398 2399 DependentScopeDeclRefExpr(QualType T, 2400 NestedNameSpecifierLoc QualifierLoc, 2401 SourceLocation TemplateKWLoc, 2402 const DeclarationNameInfo &NameInfo, 2403 const TemplateArgumentListInfo *Args); 2404 2405public: 2406 static DependentScopeDeclRefExpr *Create(ASTContext &C, 2407 NestedNameSpecifierLoc QualifierLoc, 2408 SourceLocation TemplateKWLoc, 2409 const DeclarationNameInfo &NameInfo, 2410 const TemplateArgumentListInfo *TemplateArgs); 2411 2412 static DependentScopeDeclRefExpr *CreateEmpty(ASTContext &C, 2413 bool HasTemplateKWAndArgsInfo, 2414 unsigned NumTemplateArgs); 2415 2416 /// \brief Retrieve the name that this expression refers to. 2417 const DeclarationNameInfo &getNameInfo() const { return NameInfo; } 2418 2419 /// \brief Retrieve the name that this expression refers to. 2420 DeclarationName getDeclName() const { return NameInfo.getName(); } 2421 2422 /// \brief Retrieve the location of the name within the expression. 2423 SourceLocation getLocation() const { return NameInfo.getLoc(); } 2424 2425 /// \brief Retrieve the nested-name-specifier that qualifies the 2426 /// name, with source location information. 2427 NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } 2428 2429 2430 /// \brief Retrieve the nested-name-specifier that qualifies this 2431 /// declaration. 2432 NestedNameSpecifier *getQualifier() const { 2433 return QualifierLoc.getNestedNameSpecifier(); 2434 } 2435 2436 /// \brief Retrieve the location of the template keyword preceding 2437 /// this name, if any. 2438 SourceLocation getTemplateKeywordLoc() const { 2439 if (!HasTemplateKWAndArgsInfo) return SourceLocation(); 2440 return getTemplateKWAndArgsInfo()->getTemplateKeywordLoc(); 2441 } 2442 2443 /// \brief Retrieve the location of the left angle bracket starting the 2444 /// explicit template argument list following the name, if any. 2445 SourceLocation getLAngleLoc() const { 2446 if (!HasTemplateKWAndArgsInfo) return SourceLocation(); 2447 return getTemplateKWAndArgsInfo()->LAngleLoc; 2448 } 2449 2450 /// \brief Retrieve the location of the right angle bracket ending the 2451 /// explicit template argument list following the name, if any. 2452 SourceLocation getRAngleLoc() const { 2453 if (!HasTemplateKWAndArgsInfo) return SourceLocation(); 2454 return getTemplateKWAndArgsInfo()->RAngleLoc; 2455 } 2456 2457 /// Determines whether the name was preceded by the template keyword. 2458 bool hasTemplateKeyword() const { return getTemplateKeywordLoc().isValid(); } 2459 2460 /// Determines whether this lookup had explicit template arguments. 2461 bool hasExplicitTemplateArgs() const { return getLAngleLoc().isValid(); } 2462 2463 // Note that, inconsistently with the explicit-template-argument AST 2464 // nodes, users are *forbidden* from calling these methods on objects 2465 // without explicit template arguments. 2466 2467 ASTTemplateArgumentListInfo &getExplicitTemplateArgs() { 2468 assert(hasExplicitTemplateArgs()); 2469 return *reinterpret_cast<ASTTemplateArgumentListInfo*>(this + 1); 2470 } 2471 2472 /// Gets a reference to the explicit template argument list. 2473 const ASTTemplateArgumentListInfo &getExplicitTemplateArgs() const { 2474 assert(hasExplicitTemplateArgs()); 2475 return *reinterpret_cast<const ASTTemplateArgumentListInfo*>(this + 1); 2476 } 2477 2478 /// \brief Retrieves the optional explicit template arguments. 2479 /// This points to the same data as getExplicitTemplateArgs(), but 2480 /// returns null if there are no explicit template arguments. 2481 const ASTTemplateArgumentListInfo *getOptionalExplicitTemplateArgs() { 2482 if (!hasExplicitTemplateArgs()) return 0; 2483 return &getExplicitTemplateArgs(); 2484 } 2485 2486 /// \brief Copies the template arguments (if present) into the given 2487 /// structure. 2488 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 2489 getExplicitTemplateArgs().copyInto(List); 2490 } 2491 2492 TemplateArgumentLoc const *getTemplateArgs() const { 2493 return getExplicitTemplateArgs().getTemplateArgs(); 2494 } 2495 2496 unsigned getNumTemplateArgs() const { 2497 return getExplicitTemplateArgs().NumTemplateArgs; 2498 } 2499 2500 SourceRange getSourceRange() const { 2501 SourceRange Range(QualifierLoc.getBeginLoc(), getLocation()); 2502 if (hasExplicitTemplateArgs()) 2503 Range.setEnd(getRAngleLoc()); 2504 return Range; 2505 } 2506 2507 static bool classof(const Stmt *T) { 2508 return T->getStmtClass() == DependentScopeDeclRefExprClass; 2509 } 2510 static bool classof(const DependentScopeDeclRefExpr *) { return true; } 2511 2512 child_range children() { return child_range(); } 2513 2514 friend class ASTStmtReader; 2515 friend class ASTStmtWriter; 2516}; 2517 2518/// Represents an expression --- generally a full-expression --- which 2519/// introduces cleanups to be run at the end of the sub-expression's 2520/// evaluation. The most common source of expression-introduced 2521/// cleanups is temporary objects in C++, but several other kinds of 2522/// expressions can create cleanups, including basically every 2523/// call in ARC that returns an Objective-C pointer. 2524/// 2525/// This expression also tracks whether the sub-expression contains a 2526/// potentially-evaluated block literal. The lifetime of a block 2527/// literal is the extent of the enclosing scope. 2528class ExprWithCleanups : public Expr { 2529public: 2530 /// The type of objects that are kept in the cleanup. 2531 /// It's useful to remember the set of blocks; we could also 2532 /// remember the set of temporaries, but there's currently 2533 /// no need. 2534 typedef BlockDecl *CleanupObject; 2535 2536private: 2537 Stmt *SubExpr; 2538 2539 ExprWithCleanups(EmptyShell, unsigned NumObjects); 2540 ExprWithCleanups(Expr *SubExpr, ArrayRef<CleanupObject> Objects); 2541 2542 CleanupObject *getObjectsBuffer() { 2543 return reinterpret_cast<CleanupObject*>(this + 1); 2544 } 2545 const CleanupObject *getObjectsBuffer() const { 2546 return reinterpret_cast<const CleanupObject*>(this + 1); 2547 } 2548 friend class ASTStmtReader; 2549 2550public: 2551 static ExprWithCleanups *Create(ASTContext &C, EmptyShell empty, 2552 unsigned numObjects); 2553 2554 static ExprWithCleanups *Create(ASTContext &C, Expr *subexpr, 2555 ArrayRef<CleanupObject> objects); 2556 2557 ArrayRef<CleanupObject> getObjects() const { 2558 return ArrayRef<CleanupObject>(getObjectsBuffer(), getNumObjects()); 2559 } 2560 2561 unsigned getNumObjects() const { return ExprWithCleanupsBits.NumObjects; } 2562 2563 CleanupObject getObject(unsigned i) const { 2564 assert(i < getNumObjects() && "Index out of range"); 2565 return getObjects()[i]; 2566 } 2567 2568 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 2569 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 2570 2571 /// setSubExpr - As with any mutator of the AST, be very careful 2572 /// when modifying an existing AST to preserve its invariants. 2573 void setSubExpr(Expr *E) { SubExpr = E; } 2574 2575 SourceRange getSourceRange() const { 2576 return SubExpr->getSourceRange(); 2577 } 2578 2579 // Implement isa/cast/dyncast/etc. 2580 static bool classof(const Stmt *T) { 2581 return T->getStmtClass() == ExprWithCleanupsClass; 2582 } 2583 static bool classof(const ExprWithCleanups *) { return true; } 2584 2585 // Iterators 2586 child_range children() { return child_range(&SubExpr, &SubExpr + 1); } 2587}; 2588 2589/// \brief Describes an explicit type conversion that uses functional 2590/// notion but could not be resolved because one or more arguments are 2591/// type-dependent. 2592/// 2593/// The explicit type conversions expressed by 2594/// CXXUnresolvedConstructExpr have the form \c T(a1, a2, ..., aN), 2595/// where \c T is some type and \c a1, a2, ..., aN are values, and 2596/// either \C T is a dependent type or one or more of the \c a's is 2597/// type-dependent. For example, this would occur in a template such 2598/// as: 2599/// 2600/// \code 2601/// template<typename T, typename A1> 2602/// inline T make_a(const A1& a1) { 2603/// return T(a1); 2604/// } 2605/// \endcode 2606/// 2607/// When the returned expression is instantiated, it may resolve to a 2608/// constructor call, conversion function call, or some kind of type 2609/// conversion. 2610class CXXUnresolvedConstructExpr : public Expr { 2611 /// \brief The type being constructed. 2612 TypeSourceInfo *Type; 2613 2614 /// \brief The location of the left parentheses ('('). 2615 SourceLocation LParenLoc; 2616 2617 /// \brief The location of the right parentheses (')'). 2618 SourceLocation RParenLoc; 2619 2620 /// \brief The number of arguments used to construct the type. 2621 unsigned NumArgs; 2622 2623 CXXUnresolvedConstructExpr(TypeSourceInfo *Type, 2624 SourceLocation LParenLoc, 2625 Expr **Args, 2626 unsigned NumArgs, 2627 SourceLocation RParenLoc); 2628 2629 CXXUnresolvedConstructExpr(EmptyShell Empty, unsigned NumArgs) 2630 : Expr(CXXUnresolvedConstructExprClass, Empty), Type(), NumArgs(NumArgs) { } 2631 2632 friend class ASTStmtReader; 2633 2634public: 2635 static CXXUnresolvedConstructExpr *Create(ASTContext &C, 2636 TypeSourceInfo *Type, 2637 SourceLocation LParenLoc, 2638 Expr **Args, 2639 unsigned NumArgs, 2640 SourceLocation RParenLoc); 2641 2642 static CXXUnresolvedConstructExpr *CreateEmpty(ASTContext &C, 2643 unsigned NumArgs); 2644 2645 /// \brief Retrieve the type that is being constructed, as specified 2646 /// in the source code. 2647 QualType getTypeAsWritten() const { return Type->getType(); } 2648 2649 /// \brief Retrieve the type source information for the type being 2650 /// constructed. 2651 TypeSourceInfo *getTypeSourceInfo() const { return Type; } 2652 2653 /// \brief Retrieve the location of the left parentheses ('(') that 2654 /// precedes the argument list. 2655 SourceLocation getLParenLoc() const { return LParenLoc; } 2656 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 2657 2658 /// \brief Retrieve the location of the right parentheses (')') that 2659 /// follows the argument list. 2660 SourceLocation getRParenLoc() const { return RParenLoc; } 2661 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2662 2663 /// \brief Retrieve the number of arguments. 2664 unsigned arg_size() const { return NumArgs; } 2665 2666 typedef Expr** arg_iterator; 2667 arg_iterator arg_begin() { return reinterpret_cast<Expr**>(this + 1); } 2668 arg_iterator arg_end() { return arg_begin() + NumArgs; } 2669 2670 typedef const Expr* const * const_arg_iterator; 2671 const_arg_iterator arg_begin() const { 2672 return reinterpret_cast<const Expr* const *>(this + 1); 2673 } 2674 const_arg_iterator arg_end() const { 2675 return arg_begin() + NumArgs; 2676 } 2677 2678 Expr *getArg(unsigned I) { 2679 assert(I < NumArgs && "Argument index out-of-range"); 2680 return *(arg_begin() + I); 2681 } 2682 2683 const Expr *getArg(unsigned I) const { 2684 assert(I < NumArgs && "Argument index out-of-range"); 2685 return *(arg_begin() + I); 2686 } 2687 2688 void setArg(unsigned I, Expr *E) { 2689 assert(I < NumArgs && "Argument index out-of-range"); 2690 *(arg_begin() + I) = E; 2691 } 2692 2693 SourceRange getSourceRange() const; 2694 2695 static bool classof(const Stmt *T) { 2696 return T->getStmtClass() == CXXUnresolvedConstructExprClass; 2697 } 2698 static bool classof(const CXXUnresolvedConstructExpr *) { return true; } 2699 2700 // Iterators 2701 child_range children() { 2702 Stmt **begin = reinterpret_cast<Stmt**>(this+1); 2703 return child_range(begin, begin + NumArgs); 2704 } 2705}; 2706 2707/// \brief Represents a C++ member access expression where the actual 2708/// member referenced could not be resolved because the base 2709/// expression or the member name was dependent. 2710/// 2711/// Like UnresolvedMemberExprs, these can be either implicit or 2712/// explicit accesses. It is only possible to get one of these with 2713/// an implicit access if a qualifier is provided. 2714class CXXDependentScopeMemberExpr : public Expr { 2715 /// \brief The expression for the base pointer or class reference, 2716 /// e.g., the \c x in x.f. Can be null in implicit accesses. 2717 Stmt *Base; 2718 2719 /// \brief The type of the base expression. Never null, even for 2720 /// implicit accesses. 2721 QualType BaseType; 2722 2723 /// \brief Whether this member expression used the '->' operator or 2724 /// the '.' operator. 2725 bool IsArrow : 1; 2726 2727 /// \brief Whether this member expression has info for explicit template 2728 /// keyword and arguments. 2729 bool HasTemplateKWAndArgsInfo : 1; 2730 2731 /// \brief The location of the '->' or '.' operator. 2732 SourceLocation OperatorLoc; 2733 2734 /// \brief The nested-name-specifier that precedes the member name, if any. 2735 NestedNameSpecifierLoc QualifierLoc; 2736 2737 /// \brief In a qualified member access expression such as t->Base::f, this 2738 /// member stores the resolves of name lookup in the context of the member 2739 /// access expression, to be used at instantiation time. 2740 /// 2741 /// FIXME: This member, along with the QualifierLoc, could 2742 /// be stuck into a structure that is optionally allocated at the end of 2743 /// the CXXDependentScopeMemberExpr, to save space in the common case. 2744 NamedDecl *FirstQualifierFoundInScope; 2745 2746 /// \brief The member to which this member expression refers, which 2747 /// can be name, overloaded operator, or destructor. 2748 /// FIXME: could also be a template-id 2749 DeclarationNameInfo MemberNameInfo; 2750 2751 /// \brief Return the optional template keyword and arguments info. 2752 ASTTemplateKWAndArgsInfo *getTemplateKWAndArgsInfo() { 2753 if (!HasTemplateKWAndArgsInfo) return 0; 2754 return reinterpret_cast<ASTTemplateKWAndArgsInfo*>(this + 1); 2755 } 2756 /// \brief Return the optional template keyword and arguments info. 2757 const ASTTemplateKWAndArgsInfo *getTemplateKWAndArgsInfo() const { 2758 return const_cast<CXXDependentScopeMemberExpr*>(this) 2759 ->getTemplateKWAndArgsInfo(); 2760 } 2761 2762 CXXDependentScopeMemberExpr(ASTContext &C, 2763 Expr *Base, QualType BaseType, bool IsArrow, 2764 SourceLocation OperatorLoc, 2765 NestedNameSpecifierLoc QualifierLoc, 2766 SourceLocation TemplateKWLoc, 2767 NamedDecl *FirstQualifierFoundInScope, 2768 DeclarationNameInfo MemberNameInfo, 2769 const TemplateArgumentListInfo *TemplateArgs); 2770 2771public: 2772 CXXDependentScopeMemberExpr(ASTContext &C, 2773 Expr *Base, QualType BaseType, 2774 bool IsArrow, 2775 SourceLocation OperatorLoc, 2776 NestedNameSpecifierLoc QualifierLoc, 2777 NamedDecl *FirstQualifierFoundInScope, 2778 DeclarationNameInfo MemberNameInfo); 2779 2780 static CXXDependentScopeMemberExpr * 2781 Create(ASTContext &C, 2782 Expr *Base, QualType BaseType, bool IsArrow, 2783 SourceLocation OperatorLoc, 2784 NestedNameSpecifierLoc QualifierLoc, 2785 SourceLocation TemplateKWLoc, 2786 NamedDecl *FirstQualifierFoundInScope, 2787 DeclarationNameInfo MemberNameInfo, 2788 const TemplateArgumentListInfo *TemplateArgs); 2789 2790 static CXXDependentScopeMemberExpr * 2791 CreateEmpty(ASTContext &C, bool HasTemplateKWAndArgsInfo, 2792 unsigned NumTemplateArgs); 2793 2794 /// \brief True if this is an implicit access, i.e. one in which the 2795 /// member being accessed was not written in the source. The source 2796 /// location of the operator is invalid in this case. 2797 bool isImplicitAccess() const; 2798 2799 /// \brief Retrieve the base object of this member expressions, 2800 /// e.g., the \c x in \c x.m. 2801 Expr *getBase() const { 2802 assert(!isImplicitAccess()); 2803 return cast<Expr>(Base); 2804 } 2805 2806 QualType getBaseType() const { return BaseType; } 2807 2808 /// \brief Determine whether this member expression used the '->' 2809 /// operator; otherwise, it used the '.' operator. 2810 bool isArrow() const { return IsArrow; } 2811 2812 /// \brief Retrieve the location of the '->' or '.' operator. 2813 SourceLocation getOperatorLoc() const { return OperatorLoc; } 2814 2815 /// \brief Retrieve the nested-name-specifier that qualifies the member 2816 /// name. 2817 NestedNameSpecifier *getQualifier() const { 2818 return QualifierLoc.getNestedNameSpecifier(); 2819 } 2820 2821 /// \brief Retrieve the nested-name-specifier that qualifies the member 2822 /// name, with source location information. 2823 NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } 2824 2825 2826 /// \brief Retrieve the first part of the nested-name-specifier that was 2827 /// found in the scope of the member access expression when the member access 2828 /// was initially parsed. 2829 /// 2830 /// This function only returns a useful result when member access expression 2831 /// uses a qualified member name, e.g., "x.Base::f". Here, the declaration 2832 /// returned by this function describes what was found by unqualified name 2833 /// lookup for the identifier "Base" within the scope of the member access 2834 /// expression itself. At template instantiation time, this information is 2835 /// combined with the results of name lookup into the type of the object 2836 /// expression itself (the class type of x). 2837 NamedDecl *getFirstQualifierFoundInScope() const { 2838 return FirstQualifierFoundInScope; 2839 } 2840 2841 /// \brief Retrieve the name of the member that this expression 2842 /// refers to. 2843 const DeclarationNameInfo &getMemberNameInfo() const { 2844 return MemberNameInfo; 2845 } 2846 2847 /// \brief Retrieve the name of the member that this expression 2848 /// refers to. 2849 DeclarationName getMember() const { return MemberNameInfo.getName(); } 2850 2851 // \brief Retrieve the location of the name of the member that this 2852 // expression refers to. 2853 SourceLocation getMemberLoc() const { return MemberNameInfo.getLoc(); } 2854 2855 /// \brief Retrieve the location of the template keyword preceding the 2856 /// member name, if any. 2857 SourceLocation getTemplateKeywordLoc() const { 2858 if (!HasTemplateKWAndArgsInfo) return SourceLocation(); 2859 return getTemplateKWAndArgsInfo()->getTemplateKeywordLoc(); 2860 } 2861 2862 /// \brief Retrieve the location of the left angle bracket starting the 2863 /// explicit template argument list following the member name, if any. 2864 SourceLocation getLAngleLoc() const { 2865 if (!HasTemplateKWAndArgsInfo) return SourceLocation(); 2866 return getTemplateKWAndArgsInfo()->LAngleLoc; 2867 } 2868 2869 /// \brief Retrieve the location of the right angle bracket ending the 2870 /// explicit template argument list following the member name, if any. 2871 SourceLocation getRAngleLoc() const { 2872 if (!HasTemplateKWAndArgsInfo) return SourceLocation(); 2873 return getTemplateKWAndArgsInfo()->RAngleLoc; 2874 } 2875 2876 /// Determines whether the member name was preceded by the template keyword. 2877 bool hasTemplateKeyword() const { return getTemplateKeywordLoc().isValid(); } 2878 2879 /// \brief Determines whether this member expression actually had a C++ 2880 /// template argument list explicitly specified, e.g., x.f<int>. 2881 bool hasExplicitTemplateArgs() const { return getLAngleLoc().isValid(); } 2882 2883 /// \brief Retrieve the explicit template argument list that followed the 2884 /// member template name, if any. 2885 ASTTemplateArgumentListInfo &getExplicitTemplateArgs() { 2886 assert(hasExplicitTemplateArgs()); 2887 return *reinterpret_cast<ASTTemplateArgumentListInfo *>(this + 1); 2888 } 2889 2890 /// \brief Retrieve the explicit template argument list that followed the 2891 /// member template name, if any. 2892 const ASTTemplateArgumentListInfo &getExplicitTemplateArgs() const { 2893 return const_cast<CXXDependentScopeMemberExpr *>(this) 2894 ->getExplicitTemplateArgs(); 2895 } 2896 2897 /// \brief Retrieves the optional explicit template arguments. 2898 /// This points to the same data as getExplicitTemplateArgs(), but 2899 /// returns null if there are no explicit template arguments. 2900 const ASTTemplateArgumentListInfo *getOptionalExplicitTemplateArgs() { 2901 if (!hasExplicitTemplateArgs()) return 0; 2902 return &getExplicitTemplateArgs(); 2903 } 2904 2905 /// \brief Copies the template arguments (if present) into the given 2906 /// structure. 2907 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 2908 getExplicitTemplateArgs().copyInto(List); 2909 } 2910 2911 /// \brief Initializes the template arguments using the given structure. 2912 void initializeTemplateArgumentsFrom(const TemplateArgumentListInfo &List) { 2913 getExplicitTemplateArgs().initializeFrom(List); 2914 } 2915 2916 /// \brief Retrieve the template arguments provided as part of this 2917 /// template-id. 2918 const TemplateArgumentLoc *getTemplateArgs() const { 2919 return getExplicitTemplateArgs().getTemplateArgs(); 2920 } 2921 2922 /// \brief Retrieve the number of template arguments provided as part of this 2923 /// template-id. 2924 unsigned getNumTemplateArgs() const { 2925 return getExplicitTemplateArgs().NumTemplateArgs; 2926 } 2927 2928 SourceRange getSourceRange() const { 2929 SourceRange Range; 2930 if (!isImplicitAccess()) 2931 Range.setBegin(Base->getSourceRange().getBegin()); 2932 else if (getQualifier()) 2933 Range.setBegin(getQualifierLoc().getBeginLoc()); 2934 else 2935 Range.setBegin(MemberNameInfo.getBeginLoc()); 2936 2937 if (hasExplicitTemplateArgs()) 2938 Range.setEnd(getRAngleLoc()); 2939 else 2940 Range.setEnd(MemberNameInfo.getEndLoc()); 2941 return Range; 2942 } 2943 2944 static bool classof(const Stmt *T) { 2945 return T->getStmtClass() == CXXDependentScopeMemberExprClass; 2946 } 2947 static bool classof(const CXXDependentScopeMemberExpr *) { return true; } 2948 2949 // Iterators 2950 child_range children() { 2951 if (isImplicitAccess()) return child_range(); 2952 return child_range(&Base, &Base + 1); 2953 } 2954 2955 friend class ASTStmtReader; 2956 friend class ASTStmtWriter; 2957}; 2958 2959/// \brief Represents a C++ member access expression for which lookup 2960/// produced a set of overloaded functions. 2961/// 2962/// The member access may be explicit or implicit: 2963/// struct A { 2964/// int a, b; 2965/// int explicitAccess() { return this->a + this->A::b; } 2966/// int implicitAccess() { return a + A::b; } 2967/// }; 2968/// 2969/// In the final AST, an explicit access always becomes a MemberExpr. 2970/// An implicit access may become either a MemberExpr or a 2971/// DeclRefExpr, depending on whether the member is static. 2972class UnresolvedMemberExpr : public OverloadExpr { 2973 /// \brief Whether this member expression used the '->' operator or 2974 /// the '.' operator. 2975 bool IsArrow : 1; 2976 2977 /// \brief Whether the lookup results contain an unresolved using 2978 /// declaration. 2979 bool HasUnresolvedUsing : 1; 2980 2981 /// \brief The expression for the base pointer or class reference, 2982 /// e.g., the \c x in x.f. This can be null if this is an 'unbased' 2983 /// member expression 2984 Stmt *Base; 2985 2986 /// \brief The type of the base expression; never null. 2987 QualType BaseType; 2988 2989 /// \brief The location of the '->' or '.' operator. 2990 SourceLocation OperatorLoc; 2991 2992 UnresolvedMemberExpr(ASTContext &C, bool HasUnresolvedUsing, 2993 Expr *Base, QualType BaseType, bool IsArrow, 2994 SourceLocation OperatorLoc, 2995 NestedNameSpecifierLoc QualifierLoc, 2996 SourceLocation TemplateKWLoc, 2997 const DeclarationNameInfo &MemberNameInfo, 2998 const TemplateArgumentListInfo *TemplateArgs, 2999 UnresolvedSetIterator Begin, UnresolvedSetIterator End); 3000 3001 UnresolvedMemberExpr(EmptyShell Empty) 3002 : OverloadExpr(UnresolvedMemberExprClass, Empty), IsArrow(false), 3003 HasUnresolvedUsing(false), Base(0) { } 3004 3005 friend class ASTStmtReader; 3006 3007public: 3008 static UnresolvedMemberExpr * 3009 Create(ASTContext &C, bool HasUnresolvedUsing, 3010 Expr *Base, QualType BaseType, bool IsArrow, 3011 SourceLocation OperatorLoc, 3012 NestedNameSpecifierLoc QualifierLoc, 3013 SourceLocation TemplateKWLoc, 3014 const DeclarationNameInfo &MemberNameInfo, 3015 const TemplateArgumentListInfo *TemplateArgs, 3016 UnresolvedSetIterator Begin, UnresolvedSetIterator End); 3017 3018 static UnresolvedMemberExpr * 3019 CreateEmpty(ASTContext &C, bool HasTemplateKWAndArgsInfo, 3020 unsigned NumTemplateArgs); 3021 3022 /// \brief True if this is an implicit access, i.e. one in which the 3023 /// member being accessed was not written in the source. The source 3024 /// location of the operator is invalid in this case. 3025 bool isImplicitAccess() const; 3026 3027 /// \brief Retrieve the base object of this member expressions, 3028 /// e.g., the \c x in \c x.m. 3029 Expr *getBase() { 3030 assert(!isImplicitAccess()); 3031 return cast<Expr>(Base); 3032 } 3033 const Expr *getBase() const { 3034 assert(!isImplicitAccess()); 3035 return cast<Expr>(Base); 3036 } 3037 3038 QualType getBaseType() const { return BaseType; } 3039 3040 /// \brief Determine whether the lookup results contain an unresolved using 3041 /// declaration. 3042 bool hasUnresolvedUsing() const { return HasUnresolvedUsing; } 3043 3044 /// \brief Determine whether this member expression used the '->' 3045 /// operator; otherwise, it used the '.' operator. 3046 bool isArrow() const { return IsArrow; } 3047 3048 /// \brief Retrieve the location of the '->' or '.' operator. 3049 SourceLocation getOperatorLoc() const { return OperatorLoc; } 3050 3051 /// \brief Retrieves the naming class of this lookup. 3052 CXXRecordDecl *getNamingClass() const; 3053 3054 /// \brief Retrieve the full name info for the member that this expression 3055 /// refers to. 3056 const DeclarationNameInfo &getMemberNameInfo() const { return getNameInfo(); } 3057 3058 /// \brief Retrieve the name of the member that this expression 3059 /// refers to. 3060 DeclarationName getMemberName() const { return getName(); } 3061 3062 // \brief Retrieve the location of the name of the member that this 3063 // expression refers to. 3064 SourceLocation getMemberLoc() const { return getNameLoc(); } 3065 3066 SourceRange getSourceRange() const { 3067 SourceRange Range = getMemberNameInfo().getSourceRange(); 3068 if (!isImplicitAccess()) 3069 Range.setBegin(Base->getSourceRange().getBegin()); 3070 else if (getQualifierLoc()) 3071 Range.setBegin(getQualifierLoc().getBeginLoc()); 3072 3073 if (hasExplicitTemplateArgs()) 3074 Range.setEnd(getRAngleLoc()); 3075 return Range; 3076 } 3077 3078 static bool classof(const Stmt *T) { 3079 return T->getStmtClass() == UnresolvedMemberExprClass; 3080 } 3081 static bool classof(const UnresolvedMemberExpr *) { return true; } 3082 3083 // Iterators 3084 child_range children() { 3085 if (isImplicitAccess()) return child_range(); 3086 return child_range(&Base, &Base + 1); 3087 } 3088}; 3089 3090/// \brief Represents a C++0x noexcept expression (C++ [expr.unary.noexcept]). 3091/// 3092/// The noexcept expression tests whether a given expression might throw. Its 3093/// result is a boolean constant. 3094class CXXNoexceptExpr : public Expr { 3095 bool Value : 1; 3096 Stmt *Operand; 3097 SourceRange Range; 3098 3099 friend class ASTStmtReader; 3100 3101public: 3102 CXXNoexceptExpr(QualType Ty, Expr *Operand, CanThrowResult Val, 3103 SourceLocation Keyword, SourceLocation RParen) 3104 : Expr(CXXNoexceptExprClass, Ty, VK_RValue, OK_Ordinary, 3105 /*TypeDependent*/false, 3106 /*ValueDependent*/Val == CT_Dependent, 3107 Val == CT_Dependent || Operand->isInstantiationDependent(), 3108 Operand->containsUnexpandedParameterPack()), 3109 Value(Val == CT_Cannot), Operand(Operand), Range(Keyword, RParen) 3110 { } 3111 3112 CXXNoexceptExpr(EmptyShell Empty) 3113 : Expr(CXXNoexceptExprClass, Empty) 3114 { } 3115 3116 Expr *getOperand() const { return static_cast<Expr*>(Operand); } 3117 3118 SourceRange getSourceRange() const { return Range; } 3119 3120 bool getValue() const { return Value; } 3121 3122 static bool classof(const Stmt *T) { 3123 return T->getStmtClass() == CXXNoexceptExprClass; 3124 } 3125 static bool classof(const CXXNoexceptExpr *) { return true; } 3126 3127 // Iterators 3128 child_range children() { return child_range(&Operand, &Operand + 1); } 3129}; 3130 3131/// \brief Represents a C++0x pack expansion that produces a sequence of 3132/// expressions. 3133/// 3134/// A pack expansion expression contains a pattern (which itself is an 3135/// expression) followed by an ellipsis. For example: 3136/// 3137/// \code 3138/// template<typename F, typename ...Types> 3139/// void forward(F f, Types &&...args) { 3140/// f(static_cast<Types&&>(args)...); 3141/// } 3142/// \endcode 3143/// 3144/// Here, the argument to the function object \c f is a pack expansion whose 3145/// pattern is \c static_cast<Types&&>(args). When the \c forward function 3146/// template is instantiated, the pack expansion will instantiate to zero or 3147/// or more function arguments to the function object \c f. 3148class PackExpansionExpr : public Expr { 3149 SourceLocation EllipsisLoc; 3150 3151 /// \brief The number of expansions that will be produced by this pack 3152 /// expansion expression, if known. 3153 /// 3154 /// When zero, the number of expansions is not known. Otherwise, this value 3155 /// is the number of expansions + 1. 3156 unsigned NumExpansions; 3157 3158 Stmt *Pattern; 3159 3160 friend class ASTStmtReader; 3161 friend class ASTStmtWriter; 3162 3163public: 3164 PackExpansionExpr(QualType T, Expr *Pattern, SourceLocation EllipsisLoc, 3165 llvm::Optional<unsigned> NumExpansions) 3166 : Expr(PackExpansionExprClass, T, Pattern->getValueKind(), 3167 Pattern->getObjectKind(), /*TypeDependent=*/true, 3168 /*ValueDependent=*/true, /*InstantiationDependent=*/true, 3169 /*ContainsUnexpandedParameterPack=*/false), 3170 EllipsisLoc(EllipsisLoc), 3171 NumExpansions(NumExpansions? *NumExpansions + 1 : 0), 3172 Pattern(Pattern) { } 3173 3174 PackExpansionExpr(EmptyShell Empty) : Expr(PackExpansionExprClass, Empty) { } 3175 3176 /// \brief Retrieve the pattern of the pack expansion. 3177 Expr *getPattern() { return reinterpret_cast<Expr *>(Pattern); } 3178 3179 /// \brief Retrieve the pattern of the pack expansion. 3180 const Expr *getPattern() const { return reinterpret_cast<Expr *>(Pattern); } 3181 3182 /// \brief Retrieve the location of the ellipsis that describes this pack 3183 /// expansion. 3184 SourceLocation getEllipsisLoc() const { return EllipsisLoc; } 3185 3186 /// \brief Determine the number of expansions that will be produced when 3187 /// this pack expansion is instantiated, if already known. 3188 llvm::Optional<unsigned> getNumExpansions() const { 3189 if (NumExpansions) 3190 return NumExpansions - 1; 3191 3192 return llvm::Optional<unsigned>(); 3193 } 3194 3195 SourceRange getSourceRange() const { 3196 return SourceRange(Pattern->getLocStart(), EllipsisLoc); 3197 } 3198 3199 static bool classof(const Stmt *T) { 3200 return T->getStmtClass() == PackExpansionExprClass; 3201 } 3202 static bool classof(const PackExpansionExpr *) { return true; } 3203 3204 // Iterators 3205 child_range children() { 3206 return child_range(&Pattern, &Pattern + 1); 3207 } 3208}; 3209 3210inline ASTTemplateKWAndArgsInfo *OverloadExpr::getTemplateKWAndArgsInfo() { 3211 if (!HasTemplateKWAndArgsInfo) return 0; 3212 if (isa<UnresolvedLookupExpr>(this)) 3213 return reinterpret_cast<ASTTemplateKWAndArgsInfo*> 3214 (cast<UnresolvedLookupExpr>(this) + 1); 3215 else 3216 return reinterpret_cast<ASTTemplateKWAndArgsInfo*> 3217 (cast<UnresolvedMemberExpr>(this) + 1); 3218} 3219 3220/// \brief Represents an expression that computes the length of a parameter 3221/// pack. 3222/// 3223/// \code 3224/// template<typename ...Types> 3225/// struct count { 3226/// static const unsigned value = sizeof...(Types); 3227/// }; 3228/// \endcode 3229class SizeOfPackExpr : public Expr { 3230 /// \brief The location of the 'sizeof' keyword. 3231 SourceLocation OperatorLoc; 3232 3233 /// \brief The location of the name of the parameter pack. 3234 SourceLocation PackLoc; 3235 3236 /// \brief The location of the closing parenthesis. 3237 SourceLocation RParenLoc; 3238 3239 /// \brief The length of the parameter pack, if known. 3240 /// 3241 /// When this expression is value-dependent, the length of the parameter pack 3242 /// is unknown. When this expression is not value-dependent, the length is 3243 /// known. 3244 unsigned Length; 3245 3246 /// \brief The parameter pack itself. 3247 NamedDecl *Pack; 3248 3249 friend class ASTStmtReader; 3250 friend class ASTStmtWriter; 3251 3252public: 3253 /// \brief Creates a value-dependent expression that computes the length of 3254 /// the given parameter pack. 3255 SizeOfPackExpr(QualType SizeType, SourceLocation OperatorLoc, NamedDecl *Pack, 3256 SourceLocation PackLoc, SourceLocation RParenLoc) 3257 : Expr(SizeOfPackExprClass, SizeType, VK_RValue, OK_Ordinary, 3258 /*TypeDependent=*/false, /*ValueDependent=*/true, 3259 /*InstantiationDependent=*/true, 3260 /*ContainsUnexpandedParameterPack=*/false), 3261 OperatorLoc(OperatorLoc), PackLoc(PackLoc), RParenLoc(RParenLoc), 3262 Length(0), Pack(Pack) { } 3263 3264 /// \brief Creates an expression that computes the length of 3265 /// the given parameter pack, which is already known. 3266 SizeOfPackExpr(QualType SizeType, SourceLocation OperatorLoc, NamedDecl *Pack, 3267 SourceLocation PackLoc, SourceLocation RParenLoc, 3268 unsigned Length) 3269 : Expr(SizeOfPackExprClass, SizeType, VK_RValue, OK_Ordinary, 3270 /*TypeDependent=*/false, /*ValueDependent=*/false, 3271 /*InstantiationDependent=*/false, 3272 /*ContainsUnexpandedParameterPack=*/false), 3273 OperatorLoc(OperatorLoc), PackLoc(PackLoc), RParenLoc(RParenLoc), 3274 Length(Length), Pack(Pack) { } 3275 3276 /// \brief Create an empty expression. 3277 SizeOfPackExpr(EmptyShell Empty) : Expr(SizeOfPackExprClass, Empty) { } 3278 3279 /// \brief Determine the location of the 'sizeof' keyword. 3280 SourceLocation getOperatorLoc() const { return OperatorLoc; } 3281 3282 /// \brief Determine the location of the parameter pack. 3283 SourceLocation getPackLoc() const { return PackLoc; } 3284 3285 /// \brief Determine the location of the right parenthesis. 3286 SourceLocation getRParenLoc() const { return RParenLoc; } 3287 3288 /// \brief Retrieve the parameter pack. 3289 NamedDecl *getPack() const { return Pack; } 3290 3291 /// \brief Retrieve the length of the parameter pack. 3292 /// 3293 /// This routine may only be invoked when the expression is not 3294 /// value-dependent. 3295 unsigned getPackLength() const { 3296 assert(!isValueDependent() && 3297 "Cannot get the length of a value-dependent pack size expression"); 3298 return Length; 3299 } 3300 3301 SourceRange getSourceRange() const { 3302 return SourceRange(OperatorLoc, RParenLoc); 3303 } 3304 3305 static bool classof(const Stmt *T) { 3306 return T->getStmtClass() == SizeOfPackExprClass; 3307 } 3308 static bool classof(const SizeOfPackExpr *) { return true; } 3309 3310 // Iterators 3311 child_range children() { return child_range(); } 3312}; 3313 3314/// \brief Represents a reference to a non-type template parameter 3315/// that has been substituted with a template argument. 3316class SubstNonTypeTemplateParmExpr : public Expr { 3317 /// \brief The replaced parameter. 3318 NonTypeTemplateParmDecl *Param; 3319 3320 /// \brief The replacement expression. 3321 Stmt *Replacement; 3322 3323 /// \brief The location of the non-type template parameter reference. 3324 SourceLocation NameLoc; 3325 3326 friend class ASTReader; 3327 friend class ASTStmtReader; 3328 explicit SubstNonTypeTemplateParmExpr(EmptyShell Empty) 3329 : Expr(SubstNonTypeTemplateParmExprClass, Empty) { } 3330 3331public: 3332 SubstNonTypeTemplateParmExpr(QualType type, 3333 ExprValueKind valueKind, 3334 SourceLocation loc, 3335 NonTypeTemplateParmDecl *param, 3336 Expr *replacement) 3337 : Expr(SubstNonTypeTemplateParmExprClass, type, valueKind, OK_Ordinary, 3338 replacement->isTypeDependent(), replacement->isValueDependent(), 3339 replacement->isInstantiationDependent(), 3340 replacement->containsUnexpandedParameterPack()), 3341 Param(param), Replacement(replacement), NameLoc(loc) {} 3342 3343 SourceLocation getNameLoc() const { return NameLoc; } 3344 SourceRange getSourceRange() const { return NameLoc; } 3345 3346 Expr *getReplacement() const { return cast<Expr>(Replacement); } 3347 3348 NonTypeTemplateParmDecl *getParameter() const { return Param; } 3349 3350 static bool classof(const Stmt *s) { 3351 return s->getStmtClass() == SubstNonTypeTemplateParmExprClass; 3352 } 3353 static bool classof(const SubstNonTypeTemplateParmExpr *) { 3354 return true; 3355 } 3356 3357 // Iterators 3358 child_range children() { return child_range(&Replacement, &Replacement+1); } 3359}; 3360 3361/// \brief Represents a reference to a non-type template parameter pack that 3362/// has been substituted with a non-template argument pack. 3363/// 3364/// When a pack expansion in the source code contains multiple parameter packs 3365/// and those parameter packs correspond to different levels of template 3366/// parameter lists, this node node is used to represent a non-type template 3367/// parameter pack from an outer level, which has already had its argument pack 3368/// substituted but that still lives within a pack expansion that itself 3369/// could not be instantiated. When actually performing a substitution into 3370/// that pack expansion (e.g., when all template parameters have corresponding 3371/// arguments), this type will be replaced with the appropriate underlying 3372/// expression at the current pack substitution index. 3373class SubstNonTypeTemplateParmPackExpr : public Expr { 3374 /// \brief The non-type template parameter pack itself. 3375 NonTypeTemplateParmDecl *Param; 3376 3377 /// \brief A pointer to the set of template arguments that this 3378 /// parameter pack is instantiated with. 3379 const TemplateArgument *Arguments; 3380 3381 /// \brief The number of template arguments in \c Arguments. 3382 unsigned NumArguments; 3383 3384 /// \brief The location of the non-type template parameter pack reference. 3385 SourceLocation NameLoc; 3386 3387 friend class ASTReader; 3388 friend class ASTStmtReader; 3389 explicit SubstNonTypeTemplateParmPackExpr(EmptyShell Empty) 3390 : Expr(SubstNonTypeTemplateParmPackExprClass, Empty) { } 3391 3392public: 3393 SubstNonTypeTemplateParmPackExpr(QualType T, 3394 NonTypeTemplateParmDecl *Param, 3395 SourceLocation NameLoc, 3396 const TemplateArgument &ArgPack); 3397 3398 /// \brief Retrieve the non-type template parameter pack being substituted. 3399 NonTypeTemplateParmDecl *getParameterPack() const { return Param; } 3400 3401 /// \brief Retrieve the location of the parameter pack name. 3402 SourceLocation getParameterPackLocation() const { return NameLoc; } 3403 3404 /// \brief Retrieve the template argument pack containing the substituted 3405 /// template arguments. 3406 TemplateArgument getArgumentPack() const; 3407 3408 SourceRange getSourceRange() const { return NameLoc; } 3409 3410 static bool classof(const Stmt *T) { 3411 return T->getStmtClass() == SubstNonTypeTemplateParmPackExprClass; 3412 } 3413 static bool classof(const SubstNonTypeTemplateParmPackExpr *) { 3414 return true; 3415 } 3416 3417 // Iterators 3418 child_range children() { return child_range(); } 3419}; 3420 3421/// \brief Represents a prvalue temporary that written into memory so that 3422/// a reference can bind to it. 3423/// 3424/// Prvalue expressions are materialized when they need to have an address 3425/// in memory for a reference to bind to. This happens when binding a 3426/// reference to the result of a conversion, e.g., 3427/// 3428/// \code 3429/// const int &r = 1.0; 3430/// \endcode 3431/// 3432/// Here, 1.0 is implicitly converted to an \c int. That resulting \c int is 3433/// then materialized via a \c MaterializeTemporaryExpr, and the reference 3434/// binds to the temporary. \c MaterializeTemporaryExprs are always glvalues 3435/// (either an lvalue or an xvalue, depending on the kind of reference binding 3436/// to it), maintaining the invariant that references always bind to glvalues. 3437class MaterializeTemporaryExpr : public Expr { 3438 /// \brief The temporary-generating expression whose value will be 3439 /// materialized. 3440 Stmt *Temporary; 3441 3442 friend class ASTStmtReader; 3443 friend class ASTStmtWriter; 3444 3445public: 3446 MaterializeTemporaryExpr(QualType T, Expr *Temporary, 3447 bool BoundToLvalueReference) 3448 : Expr(MaterializeTemporaryExprClass, T, 3449 BoundToLvalueReference? VK_LValue : VK_XValue, OK_Ordinary, 3450 Temporary->isTypeDependent(), Temporary->isValueDependent(), 3451 Temporary->isInstantiationDependent(), 3452 Temporary->containsUnexpandedParameterPack()), 3453 Temporary(Temporary) { } 3454 3455 MaterializeTemporaryExpr(EmptyShell Empty) 3456 : Expr(MaterializeTemporaryExprClass, Empty) { } 3457 3458 /// \brief Retrieve the temporary-generating subexpression whose value will 3459 /// be materialized into a glvalue. 3460 Expr *GetTemporaryExpr() const { return reinterpret_cast<Expr *>(Temporary); } 3461 3462 /// \brief Determine whether this materialized temporary is bound to an 3463 /// lvalue reference; otherwise, it's bound to an rvalue reference. 3464 bool isBoundToLvalueReference() const { 3465 return getValueKind() == VK_LValue; 3466 } 3467 3468 SourceRange getSourceRange() const { return Temporary->getSourceRange(); } 3469 3470 static bool classof(const Stmt *T) { 3471 return T->getStmtClass() == MaterializeTemporaryExprClass; 3472 } 3473 static bool classof(const MaterializeTemporaryExpr *) { 3474 return true; 3475 } 3476 3477 // Iterators 3478 child_range children() { return child_range(&Temporary, &Temporary + 1); } 3479}; 3480 3481} // end namespace clang 3482 3483#endif 3484