ExprCXX.h revision def0354384d9c4431f7b58b664b59896d4623028
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/Basic/TypeTraits.h" 18#include "clang/AST/Expr.h" 19#include "clang/AST/UnresolvedSet.h" 20#include "clang/AST/TemplateBase.h" 21 22namespace clang { 23 24class CXXConstructorDecl; 25class CXXDestructorDecl; 26class CXXMethodDecl; 27class CXXTemporary; 28class TemplateArgumentListInfo; 29 30//===--------------------------------------------------------------------===// 31// C++ Expressions. 32//===--------------------------------------------------------------------===// 33 34/// \brief A call to an overloaded operator written using operator 35/// syntax. 36/// 37/// Represents a call to an overloaded operator written using operator 38/// syntax, e.g., "x + y" or "*p". While semantically equivalent to a 39/// normal call, this AST node provides better information about the 40/// syntactic representation of the call. 41/// 42/// In a C++ template, this expression node kind will be used whenever 43/// any of the arguments are type-dependent. In this case, the 44/// function itself will be a (possibly empty) set of functions and 45/// function templates that were found by name lookup at template 46/// definition time. 47class CXXOperatorCallExpr : public CallExpr { 48 /// \brief The overloaded operator. 49 OverloadedOperatorKind Operator; 50 51public: 52 CXXOperatorCallExpr(ASTContext& C, OverloadedOperatorKind Op, Expr *fn, 53 Expr **args, unsigned numargs, QualType t, 54 ExprValueKind VK, SourceLocation operatorloc) 55 : CallExpr(C, CXXOperatorCallExprClass, fn, args, numargs, t, VK, 56 operatorloc), 57 Operator(Op) {} 58 explicit CXXOperatorCallExpr(ASTContext& C, EmptyShell Empty) : 59 CallExpr(C, CXXOperatorCallExprClass, Empty) { } 60 61 62 /// getOperator - Returns the kind of overloaded operator that this 63 /// expression refers to. 64 OverloadedOperatorKind getOperator() const { return Operator; } 65 void setOperator(OverloadedOperatorKind Kind) { Operator = Kind; } 66 67 /// getOperatorLoc - Returns the location of the operator symbol in 68 /// the expression. When @c getOperator()==OO_Call, this is the 69 /// location of the right parentheses; when @c 70 /// getOperator()==OO_Subscript, this is the location of the right 71 /// bracket. 72 SourceLocation getOperatorLoc() const { return getRParenLoc(); } 73 74 virtual SourceRange getSourceRange() const; 75 76 static bool classof(const Stmt *T) { 77 return T->getStmtClass() == CXXOperatorCallExprClass; 78 } 79 static bool classof(const CXXOperatorCallExpr *) { return true; } 80}; 81 82/// CXXMemberCallExpr - Represents a call to a member function that 83/// may be written either with member call syntax (e.g., "obj.func()" 84/// or "objptr->func()") or with normal function-call syntax 85/// ("func()") within a member function that ends up calling a member 86/// function. The callee in either case is a MemberExpr that contains 87/// both the object argument and the member function, while the 88/// arguments are the arguments within the parentheses (not including 89/// the object argument). 90class CXXMemberCallExpr : public CallExpr { 91public: 92 CXXMemberCallExpr(ASTContext &C, Expr *fn, Expr **args, unsigned numargs, 93 QualType t, ExprValueKind VK, SourceLocation RP) 94 : CallExpr(C, CXXMemberCallExprClass, fn, args, numargs, t, VK, RP) {} 95 96 CXXMemberCallExpr(ASTContext &C, EmptyShell Empty) 97 : CallExpr(C, CXXMemberCallExprClass, Empty) { } 98 99 /// getImplicitObjectArgument - Retrieves the implicit object 100 /// argument for the member call. For example, in "x.f(5)", this 101 /// operation would return "x". 102 Expr *getImplicitObjectArgument(); 103 104 /// getRecordDecl - Retrieves the CXXRecordDecl for the underlying type of 105 /// the implicit object argument. Note that this is may not be the same 106 /// declaration as that of the class context of the CXXMethodDecl which this 107 /// function is calling. 108 /// FIXME: Returns 0 for member pointer call exprs. 109 CXXRecordDecl *getRecordDecl(); 110 111 virtual SourceRange getSourceRange() const; 112 113 static bool classof(const Stmt *T) { 114 return T->getStmtClass() == CXXMemberCallExprClass; 115 } 116 static bool classof(const CXXMemberCallExpr *) { return true; } 117}; 118 119/// CXXNamedCastExpr - Abstract class common to all of the C++ "named" 120/// casts, @c static_cast, @c dynamic_cast, @c reinterpret_cast, or @c 121/// const_cast. 122/// 123/// This abstract class is inherited by all of the classes 124/// representing "named" casts, e.g., CXXStaticCastExpr, 125/// CXXDynamicCastExpr, CXXReinterpretCastExpr, and CXXConstCastExpr. 126class CXXNamedCastExpr : public ExplicitCastExpr { 127private: 128 SourceLocation Loc; // the location of the casting op 129 SourceLocation RParenLoc; // the location of the right parenthesis 130 131protected: 132 CXXNamedCastExpr(StmtClass SC, QualType ty, ExprValueKind VK, 133 CastKind kind, Expr *op, unsigned PathSize, 134 TypeSourceInfo *writtenTy, SourceLocation l, 135 SourceLocation RParenLoc) 136 : ExplicitCastExpr(SC, ty, VK, kind, op, PathSize, writtenTy), Loc(l), 137 RParenLoc(RParenLoc) {} 138 139 explicit CXXNamedCastExpr(StmtClass SC, EmptyShell Shell, unsigned PathSize) 140 : ExplicitCastExpr(SC, Shell, PathSize) { } 141 142 friend class ASTStmtReader; 143 144public: 145 const char *getCastName() const; 146 147 /// \brief Retrieve the location of the cast operator keyword, e.g., 148 /// "static_cast". 149 SourceLocation getOperatorLoc() const { return Loc; } 150 151 /// \brief Retrieve the location of the closing parenthesis. 152 SourceLocation getRParenLoc() const { return RParenLoc; } 153 154 virtual SourceRange getSourceRange() const { 155 return SourceRange(Loc, RParenLoc); 156 } 157 static bool classof(const Stmt *T) { 158 switch (T->getStmtClass()) { 159 case CXXStaticCastExprClass: 160 case CXXDynamicCastExprClass: 161 case CXXReinterpretCastExprClass: 162 case CXXConstCastExprClass: 163 return true; 164 default: 165 return false; 166 } 167 } 168 static bool classof(const CXXNamedCastExpr *) { return true; } 169}; 170 171/// CXXStaticCastExpr - A C++ @c static_cast expression (C++ [expr.static.cast]). 172/// 173/// This expression node represents a C++ static cast, e.g., 174/// @c static_cast<int>(1.0). 175class CXXStaticCastExpr : public CXXNamedCastExpr { 176 CXXStaticCastExpr(QualType ty, ExprValueKind vk, CastKind kind, Expr *op, 177 unsigned pathSize, TypeSourceInfo *writtenTy, 178 SourceLocation l, SourceLocation RParenLoc) 179 : CXXNamedCastExpr(CXXStaticCastExprClass, ty, vk, kind, op, pathSize, 180 writtenTy, l, RParenLoc) {} 181 182 explicit CXXStaticCastExpr(EmptyShell Empty, unsigned PathSize) 183 : CXXNamedCastExpr(CXXStaticCastExprClass, Empty, PathSize) { } 184 185public: 186 static CXXStaticCastExpr *Create(ASTContext &Context, QualType T, 187 ExprValueKind VK, CastKind K, Expr *Op, 188 const CXXCastPath *Path, 189 TypeSourceInfo *Written, SourceLocation L, 190 SourceLocation RParenLoc); 191 static CXXStaticCastExpr *CreateEmpty(ASTContext &Context, 192 unsigned PathSize); 193 194 static bool classof(const Stmt *T) { 195 return T->getStmtClass() == CXXStaticCastExprClass; 196 } 197 static bool classof(const CXXStaticCastExpr *) { return true; } 198}; 199 200/// CXXDynamicCastExpr - A C++ @c dynamic_cast expression 201/// (C++ [expr.dynamic.cast]), which may perform a run-time check to 202/// determine how to perform the type cast. 203/// 204/// This expression node represents a dynamic cast, e.g., 205/// @c dynamic_cast<Derived*>(BasePtr). 206class CXXDynamicCastExpr : public CXXNamedCastExpr { 207 CXXDynamicCastExpr(QualType ty, ExprValueKind VK, CastKind kind, 208 Expr *op, unsigned pathSize, TypeSourceInfo *writtenTy, 209 SourceLocation l, SourceLocation RParenLoc) 210 : CXXNamedCastExpr(CXXDynamicCastExprClass, ty, VK, kind, op, pathSize, 211 writtenTy, l, RParenLoc) {} 212 213 explicit CXXDynamicCastExpr(EmptyShell Empty, unsigned pathSize) 214 : CXXNamedCastExpr(CXXDynamicCastExprClass, Empty, pathSize) { } 215 216public: 217 static CXXDynamicCastExpr *Create(ASTContext &Context, QualType T, 218 ExprValueKind VK, CastKind Kind, Expr *Op, 219 const CXXCastPath *Path, 220 TypeSourceInfo *Written, SourceLocation L, 221 SourceLocation RParenLoc); 222 223 static CXXDynamicCastExpr *CreateEmpty(ASTContext &Context, 224 unsigned pathSize); 225 226 static bool classof(const Stmt *T) { 227 return T->getStmtClass() == CXXDynamicCastExprClass; 228 } 229 static bool classof(const CXXDynamicCastExpr *) { return true; } 230}; 231 232/// CXXReinterpretCastExpr - A C++ @c reinterpret_cast expression (C++ 233/// [expr.reinterpret.cast]), which provides a differently-typed view 234/// of a value but performs no actual work at run time. 235/// 236/// This expression node represents a reinterpret cast, e.g., 237/// @c reinterpret_cast<int>(VoidPtr). 238class CXXReinterpretCastExpr : public CXXNamedCastExpr { 239 CXXReinterpretCastExpr(QualType ty, ExprValueKind vk, CastKind kind, 240 Expr *op, unsigned pathSize, 241 TypeSourceInfo *writtenTy, SourceLocation l, 242 SourceLocation RParenLoc) 243 : CXXNamedCastExpr(CXXReinterpretCastExprClass, ty, vk, kind, op, 244 pathSize, writtenTy, l, RParenLoc) {} 245 246 CXXReinterpretCastExpr(EmptyShell Empty, unsigned pathSize) 247 : CXXNamedCastExpr(CXXReinterpretCastExprClass, Empty, pathSize) { } 248 249public: 250 static CXXReinterpretCastExpr *Create(ASTContext &Context, QualType T, 251 ExprValueKind VK, CastKind Kind, 252 Expr *Op, const CXXCastPath *Path, 253 TypeSourceInfo *WrittenTy, SourceLocation L, 254 SourceLocation RParenLoc); 255 static CXXReinterpretCastExpr *CreateEmpty(ASTContext &Context, 256 unsigned pathSize); 257 258 static bool classof(const Stmt *T) { 259 return T->getStmtClass() == CXXReinterpretCastExprClass; 260 } 261 static bool classof(const CXXReinterpretCastExpr *) { return true; } 262}; 263 264/// CXXConstCastExpr - A C++ @c const_cast expression (C++ [expr.const.cast]), 265/// which can remove type qualifiers but does not change the underlying value. 266/// 267/// This expression node represents a const cast, e.g., 268/// @c const_cast<char*>(PtrToConstChar). 269class CXXConstCastExpr : public CXXNamedCastExpr { 270 CXXConstCastExpr(QualType ty, ExprValueKind VK, Expr *op, 271 TypeSourceInfo *writtenTy, SourceLocation l, 272 SourceLocation RParenLoc) 273 : CXXNamedCastExpr(CXXConstCastExprClass, ty, VK, CK_NoOp, op, 274 0, writtenTy, l, RParenLoc) {} 275 276 explicit CXXConstCastExpr(EmptyShell Empty) 277 : CXXNamedCastExpr(CXXConstCastExprClass, Empty, 0) { } 278 279public: 280 static CXXConstCastExpr *Create(ASTContext &Context, QualType T, 281 ExprValueKind VK, Expr *Op, 282 TypeSourceInfo *WrittenTy, SourceLocation L, 283 SourceLocation RParenLoc); 284 static CXXConstCastExpr *CreateEmpty(ASTContext &Context); 285 286 static bool classof(const Stmt *T) { 287 return T->getStmtClass() == CXXConstCastExprClass; 288 } 289 static bool classof(const CXXConstCastExpr *) { return true; } 290}; 291 292/// CXXBoolLiteralExpr - [C++ 2.13.5] C++ Boolean Literal. 293/// 294class CXXBoolLiteralExpr : public Expr { 295 bool Value; 296 SourceLocation Loc; 297public: 298 CXXBoolLiteralExpr(bool val, QualType Ty, SourceLocation l) : 299 Expr(CXXBoolLiteralExprClass, Ty, VK_RValue, OK_Ordinary, false, false, 300 false), 301 Value(val), Loc(l) {} 302 303 explicit CXXBoolLiteralExpr(EmptyShell Empty) 304 : Expr(CXXBoolLiteralExprClass, Empty) { } 305 306 bool getValue() const { return Value; } 307 void setValue(bool V) { Value = V; } 308 309 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 310 311 SourceLocation getLocation() const { return Loc; } 312 void setLocation(SourceLocation L) { Loc = L; } 313 314 static bool classof(const Stmt *T) { 315 return T->getStmtClass() == CXXBoolLiteralExprClass; 316 } 317 static bool classof(const CXXBoolLiteralExpr *) { return true; } 318 319 // Iterators 320 virtual child_iterator child_begin(); 321 virtual child_iterator child_end(); 322}; 323 324/// CXXNullPtrLiteralExpr - [C++0x 2.14.7] C++ Pointer Literal 325class CXXNullPtrLiteralExpr : public Expr { 326 SourceLocation Loc; 327public: 328 CXXNullPtrLiteralExpr(QualType Ty, SourceLocation l) : 329 Expr(CXXNullPtrLiteralExprClass, Ty, VK_RValue, OK_Ordinary, false, false, 330 false), 331 Loc(l) {} 332 333 explicit CXXNullPtrLiteralExpr(EmptyShell Empty) 334 : Expr(CXXNullPtrLiteralExprClass, Empty) { } 335 336 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 337 338 SourceLocation getLocation() const { return Loc; } 339 void setLocation(SourceLocation L) { Loc = L; } 340 341 static bool classof(const Stmt *T) { 342 return T->getStmtClass() == CXXNullPtrLiteralExprClass; 343 } 344 static bool classof(const CXXNullPtrLiteralExpr *) { return true; } 345 346 virtual child_iterator child_begin(); 347 virtual child_iterator child_end(); 348}; 349 350/// CXXTypeidExpr - A C++ @c typeid expression (C++ [expr.typeid]), which gets 351/// the type_info that corresponds to the supplied type, or the (possibly 352/// dynamic) type of the supplied expression. 353/// 354/// This represents code like @c typeid(int) or @c typeid(*objPtr) 355class CXXTypeidExpr : public Expr { 356private: 357 llvm::PointerUnion<Stmt *, TypeSourceInfo *> Operand; 358 SourceRange Range; 359 360public: 361 CXXTypeidExpr(QualType Ty, TypeSourceInfo *Operand, SourceRange R) 362 : Expr(CXXTypeidExprClass, Ty, VK_LValue, OK_Ordinary, 363 // typeid is never type-dependent (C++ [temp.dep.expr]p4) 364 false, 365 // typeid is value-dependent if the type or expression are dependent 366 Operand->getType()->isDependentType(), 367 Operand->getType()->containsUnexpandedParameterPack()), 368 Operand(Operand), Range(R) { } 369 370 CXXTypeidExpr(QualType Ty, Expr *Operand, SourceRange R) 371 : Expr(CXXTypeidExprClass, Ty, VK_LValue, OK_Ordinary, 372 // typeid is never type-dependent (C++ [temp.dep.expr]p4) 373 false, 374 // typeid is value-dependent if the type or expression are dependent 375 Operand->isTypeDependent() || Operand->isValueDependent(), 376 Operand->containsUnexpandedParameterPack()), 377 Operand(Operand), Range(R) { } 378 379 CXXTypeidExpr(EmptyShell Empty, bool isExpr) 380 : Expr(CXXTypeidExprClass, Empty) { 381 if (isExpr) 382 Operand = (Expr*)0; 383 else 384 Operand = (TypeSourceInfo*)0; 385 } 386 387 bool isTypeOperand() const { return Operand.is<TypeSourceInfo *>(); } 388 389 /// \brief Retrieves the type operand of this typeid() expression after 390 /// various required adjustments (removing reference types, cv-qualifiers). 391 QualType getTypeOperand() const; 392 393 /// \brief Retrieve source information for the type operand. 394 TypeSourceInfo *getTypeOperandSourceInfo() const { 395 assert(isTypeOperand() && "Cannot call getTypeOperand for typeid(expr)"); 396 return Operand.get<TypeSourceInfo *>(); 397 } 398 399 void setTypeOperandSourceInfo(TypeSourceInfo *TSI) { 400 assert(isTypeOperand() && "Cannot call getTypeOperand for typeid(expr)"); 401 Operand = TSI; 402 } 403 404 Expr *getExprOperand() const { 405 assert(!isTypeOperand() && "Cannot call getExprOperand for typeid(type)"); 406 return static_cast<Expr*>(Operand.get<Stmt *>()); 407 } 408 409 void setExprOperand(Expr *E) { 410 assert(!isTypeOperand() && "Cannot call getExprOperand for typeid(type)"); 411 Operand = E; 412 } 413 414 virtual SourceRange getSourceRange() const { return Range; } 415 void setSourceRange(SourceRange R) { Range = R; } 416 417 static bool classof(const Stmt *T) { 418 return T->getStmtClass() == CXXTypeidExprClass; 419 } 420 static bool classof(const CXXTypeidExpr *) { return true; } 421 422 // Iterators 423 virtual child_iterator child_begin(); 424 virtual child_iterator child_end(); 425}; 426 427/// CXXUuidofExpr - A microsoft C++ @c __uuidof expression, which gets 428/// the _GUID that corresponds to the supplied type or expression. 429/// 430/// This represents code like @c __uuidof(COMTYPE) or @c __uuidof(*comPtr) 431class CXXUuidofExpr : public Expr { 432private: 433 llvm::PointerUnion<Stmt *, TypeSourceInfo *> Operand; 434 SourceRange Range; 435 436public: 437 CXXUuidofExpr(QualType Ty, TypeSourceInfo *Operand, SourceRange R) 438 : Expr(CXXUuidofExprClass, Ty, VK_LValue, OK_Ordinary, 439 false, Operand->getType()->isDependentType(), 440 Operand->getType()->containsUnexpandedParameterPack()), 441 Operand(Operand), Range(R) { } 442 443 CXXUuidofExpr(QualType Ty, Expr *Operand, SourceRange R) 444 : Expr(CXXUuidofExprClass, Ty, VK_LValue, OK_Ordinary, 445 false, Operand->isTypeDependent(), 446 Operand->containsUnexpandedParameterPack()), 447 Operand(Operand), Range(R) { } 448 449 CXXUuidofExpr(EmptyShell Empty, bool isExpr) 450 : Expr(CXXUuidofExprClass, Empty) { 451 if (isExpr) 452 Operand = (Expr*)0; 453 else 454 Operand = (TypeSourceInfo*)0; 455 } 456 457 bool isTypeOperand() const { return Operand.is<TypeSourceInfo *>(); } 458 459 /// \brief Retrieves the type operand of this __uuidof() expression after 460 /// various required adjustments (removing reference types, cv-qualifiers). 461 QualType getTypeOperand() const; 462 463 /// \brief Retrieve source information for the type operand. 464 TypeSourceInfo *getTypeOperandSourceInfo() const { 465 assert(isTypeOperand() && "Cannot call getTypeOperand for __uuidof(expr)"); 466 return Operand.get<TypeSourceInfo *>(); 467 } 468 469 void setTypeOperandSourceInfo(TypeSourceInfo *TSI) { 470 assert(isTypeOperand() && "Cannot call getTypeOperand for __uuidof(expr)"); 471 Operand = TSI; 472 } 473 474 Expr *getExprOperand() const { 475 assert(!isTypeOperand() && "Cannot call getExprOperand for __uuidof(type)"); 476 return static_cast<Expr*>(Operand.get<Stmt *>()); 477 } 478 479 void setExprOperand(Expr *E) { 480 assert(!isTypeOperand() && "Cannot call getExprOperand for __uuidof(type)"); 481 Operand = E; 482 } 483 484 virtual SourceRange getSourceRange() const { return Range; } 485 void setSourceRange(SourceRange R) { Range = R; } 486 487 static bool classof(const Stmt *T) { 488 return T->getStmtClass() == CXXUuidofExprClass; 489 } 490 static bool classof(const CXXUuidofExpr *) { return true; } 491 492 // Iterators 493 virtual child_iterator child_begin(); 494 virtual child_iterator child_end(); 495}; 496 497/// CXXThisExpr - Represents the "this" expression in C++, which is a 498/// pointer to the object on which the current member function is 499/// executing (C++ [expr.prim]p3). Example: 500/// 501/// @code 502/// class Foo { 503/// public: 504/// void bar(); 505/// void test() { this->bar(); } 506/// }; 507/// @endcode 508class CXXThisExpr : public Expr { 509 SourceLocation Loc; 510 bool Implicit : 1; 511 512public: 513 CXXThisExpr(SourceLocation L, QualType Type, bool isImplicit) 514 : Expr(CXXThisExprClass, Type, VK_RValue, OK_Ordinary, 515 // 'this' is type-dependent if the class type of the enclosing 516 // member function is dependent (C++ [temp.dep.expr]p2) 517 Type->isDependentType(), Type->isDependentType(), 518 /*ContainsUnexpandedParameterPack=*/false), 519 Loc(L), Implicit(isImplicit) { } 520 521 CXXThisExpr(EmptyShell Empty) : Expr(CXXThisExprClass, Empty) {} 522 523 SourceLocation getLocation() const { return Loc; } 524 void setLocation(SourceLocation L) { Loc = L; } 525 526 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 527 528 bool isImplicit() const { return Implicit; } 529 void setImplicit(bool I) { Implicit = I; } 530 531 static bool classof(const Stmt *T) { 532 return T->getStmtClass() == CXXThisExprClass; 533 } 534 static bool classof(const CXXThisExpr *) { return true; } 535 536 // Iterators 537 virtual child_iterator child_begin(); 538 virtual child_iterator child_end(); 539}; 540 541/// CXXThrowExpr - [C++ 15] C++ Throw Expression. This handles 542/// 'throw' and 'throw' assignment-expression. When 543/// assignment-expression isn't present, Op will be null. 544/// 545class CXXThrowExpr : public Expr { 546 Stmt *Op; 547 SourceLocation ThrowLoc; 548public: 549 // Ty is the void type which is used as the result type of the 550 // exepression. The l is the location of the throw keyword. expr 551 // can by null, if the optional expression to throw isn't present. 552 CXXThrowExpr(Expr *expr, QualType Ty, SourceLocation l) : 553 Expr(CXXThrowExprClass, Ty, VK_RValue, OK_Ordinary, false, false, 554 expr && expr->containsUnexpandedParameterPack()), 555 Op(expr), ThrowLoc(l) {} 556 CXXThrowExpr(EmptyShell Empty) : Expr(CXXThrowExprClass, Empty) {} 557 558 const Expr *getSubExpr() const { return cast_or_null<Expr>(Op); } 559 Expr *getSubExpr() { return cast_or_null<Expr>(Op); } 560 void setSubExpr(Expr *E) { Op = E; } 561 562 SourceLocation getThrowLoc() const { return ThrowLoc; } 563 void setThrowLoc(SourceLocation L) { ThrowLoc = L; } 564 565 virtual SourceRange getSourceRange() const { 566 if (getSubExpr() == 0) 567 return SourceRange(ThrowLoc, ThrowLoc); 568 return SourceRange(ThrowLoc, getSubExpr()->getSourceRange().getEnd()); 569 } 570 571 static bool classof(const Stmt *T) { 572 return T->getStmtClass() == CXXThrowExprClass; 573 } 574 static bool classof(const CXXThrowExpr *) { return true; } 575 576 // Iterators 577 virtual child_iterator child_begin(); 578 virtual child_iterator child_end(); 579}; 580 581/// CXXDefaultArgExpr - C++ [dcl.fct.default]. This wraps up a 582/// function call argument that was created from the corresponding 583/// parameter's default argument, when the call did not explicitly 584/// supply arguments for all of the parameters. 585class CXXDefaultArgExpr : public Expr { 586 /// \brief The parameter whose default is being used. 587 /// 588 /// When the bit is set, the subexpression is stored after the 589 /// CXXDefaultArgExpr itself. When the bit is clear, the parameter's 590 /// actual default expression is the subexpression. 591 llvm::PointerIntPair<ParmVarDecl *, 1, bool> Param; 592 593 /// \brief The location where the default argument expression was used. 594 SourceLocation Loc; 595 596 CXXDefaultArgExpr(StmtClass SC, SourceLocation Loc, ParmVarDecl *param) 597 : Expr(SC, 598 param->hasUnparsedDefaultArg() 599 ? param->getType().getNonReferenceType() 600 : param->getDefaultArg()->getType(), 601 param->getDefaultArg()->getValueKind(), 602 param->getDefaultArg()->getObjectKind(), false, false, false), 603 Param(param, false), Loc(Loc) { } 604 605 CXXDefaultArgExpr(StmtClass SC, SourceLocation Loc, ParmVarDecl *param, 606 Expr *SubExpr) 607 : Expr(SC, SubExpr->getType(), 608 SubExpr->getValueKind(), SubExpr->getObjectKind(), 609 false, false, false), 610 Param(param, true), Loc(Loc) { 611 *reinterpret_cast<Expr **>(this + 1) = SubExpr; 612 } 613 614public: 615 CXXDefaultArgExpr(EmptyShell Empty) : Expr(CXXDefaultArgExprClass, Empty) {} 616 617 618 // Param is the parameter whose default argument is used by this 619 // expression. 620 static CXXDefaultArgExpr *Create(ASTContext &C, SourceLocation Loc, 621 ParmVarDecl *Param) { 622 return new (C) CXXDefaultArgExpr(CXXDefaultArgExprClass, Loc, Param); 623 } 624 625 // Param is the parameter whose default argument is used by this 626 // expression, and SubExpr is the expression that will actually be used. 627 static CXXDefaultArgExpr *Create(ASTContext &C, 628 SourceLocation Loc, 629 ParmVarDecl *Param, 630 Expr *SubExpr); 631 632 // Retrieve the parameter that the argument was created from. 633 const ParmVarDecl *getParam() const { return Param.getPointer(); } 634 ParmVarDecl *getParam() { return Param.getPointer(); } 635 636 // Retrieve the actual argument to the function call. 637 const Expr *getExpr() const { 638 if (Param.getInt()) 639 return *reinterpret_cast<Expr const * const*> (this + 1); 640 return getParam()->getDefaultArg(); 641 } 642 Expr *getExpr() { 643 if (Param.getInt()) 644 return *reinterpret_cast<Expr **> (this + 1); 645 return getParam()->getDefaultArg(); 646 } 647 648 /// \brief Retrieve the location where this default argument was actually 649 /// used. 650 SourceLocation getUsedLocation() const { return Loc; } 651 652 virtual SourceRange getSourceRange() const { 653 // Default argument expressions have no representation in the 654 // source, so they have an empty source range. 655 return SourceRange(); 656 } 657 658 static bool classof(const Stmt *T) { 659 return T->getStmtClass() == CXXDefaultArgExprClass; 660 } 661 static bool classof(const CXXDefaultArgExpr *) { return true; } 662 663 // Iterators 664 virtual child_iterator child_begin(); 665 virtual child_iterator child_end(); 666 667 friend class ASTStmtReader; 668 friend class ASTStmtWriter; 669}; 670 671/// CXXTemporary - Represents a C++ temporary. 672class CXXTemporary { 673 /// Destructor - The destructor that needs to be called. 674 const CXXDestructorDecl *Destructor; 675 676 CXXTemporary(const CXXDestructorDecl *destructor) 677 : Destructor(destructor) { } 678 679public: 680 static CXXTemporary *Create(ASTContext &C, 681 const CXXDestructorDecl *Destructor); 682 683 const CXXDestructorDecl *getDestructor() const { return Destructor; } 684}; 685 686/// \brief Represents binding an expression to a temporary. 687/// 688/// This ensures the destructor is called for the temporary. It should only be 689/// needed for non-POD, non-trivially destructable class types. For example: 690/// 691/// \code 692/// struct S { 693/// S() { } // User defined constructor makes S non-POD. 694/// ~S() { } // User defined destructor makes it non-trivial. 695/// }; 696/// void test() { 697/// const S &s_ref = S(); // Requires a CXXBindTemporaryExpr. 698/// } 699/// \endcode 700class CXXBindTemporaryExpr : public Expr { 701 CXXTemporary *Temp; 702 703 Stmt *SubExpr; 704 705 CXXBindTemporaryExpr(CXXTemporary *temp, Expr* SubExpr) 706 : Expr(CXXBindTemporaryExprClass, SubExpr->getType(), 707 VK_RValue, OK_Ordinary, SubExpr->isTypeDependent(), 708 SubExpr->isValueDependent(), 709 SubExpr->containsUnexpandedParameterPack()), 710 Temp(temp), SubExpr(SubExpr) { } 711 712public: 713 CXXBindTemporaryExpr(EmptyShell Empty) 714 : Expr(CXXBindTemporaryExprClass, Empty), Temp(0), SubExpr(0) {} 715 716 static CXXBindTemporaryExpr *Create(ASTContext &C, CXXTemporary *Temp, 717 Expr* SubExpr); 718 719 CXXTemporary *getTemporary() { return Temp; } 720 const CXXTemporary *getTemporary() const { return Temp; } 721 void setTemporary(CXXTemporary *T) { Temp = T; } 722 723 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 724 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 725 void setSubExpr(Expr *E) { SubExpr = E; } 726 727 virtual SourceRange getSourceRange() const { 728 return SubExpr->getSourceRange(); 729 } 730 731 // Implement isa/cast/dyncast/etc. 732 static bool classof(const Stmt *T) { 733 return T->getStmtClass() == CXXBindTemporaryExprClass; 734 } 735 static bool classof(const CXXBindTemporaryExpr *) { return true; } 736 737 // Iterators 738 virtual child_iterator child_begin(); 739 virtual child_iterator child_end(); 740}; 741 742/// CXXConstructExpr - Represents a call to a C++ constructor. 743class CXXConstructExpr : public Expr { 744public: 745 enum ConstructionKind { 746 CK_Complete, 747 CK_NonVirtualBase, 748 CK_VirtualBase 749 }; 750 751private: 752 CXXConstructorDecl *Constructor; 753 754 SourceLocation Loc; 755 SourceRange ParenRange; 756 bool Elidable : 1; 757 bool ZeroInitialization : 1; 758 unsigned ConstructKind : 2; 759 Stmt **Args; 760 unsigned NumArgs; 761 762protected: 763 CXXConstructExpr(ASTContext &C, StmtClass SC, QualType T, 764 SourceLocation Loc, 765 CXXConstructorDecl *d, bool elidable, 766 Expr **args, unsigned numargs, 767 bool ZeroInitialization = false, 768 ConstructionKind ConstructKind = CK_Complete, 769 SourceRange ParenRange = SourceRange()); 770 771 /// \brief Construct an empty C++ construction expression. 772 CXXConstructExpr(StmtClass SC, EmptyShell Empty) 773 : Expr(SC, Empty), Constructor(0), Elidable(0), ZeroInitialization(0), 774 ConstructKind(0), Args(0), NumArgs(0) { } 775 776public: 777 /// \brief Construct an empty C++ construction expression. 778 explicit CXXConstructExpr(EmptyShell Empty) 779 : Expr(CXXConstructExprClass, Empty), Constructor(0), 780 Elidable(0), ZeroInitialization(0), 781 ConstructKind(0), Args(0), NumArgs(0) { } 782 783 static CXXConstructExpr *Create(ASTContext &C, QualType T, 784 SourceLocation Loc, 785 CXXConstructorDecl *D, bool Elidable, 786 Expr **Args, unsigned NumArgs, 787 bool ZeroInitialization = false, 788 ConstructionKind ConstructKind = CK_Complete, 789 SourceRange ParenRange = SourceRange()); 790 791 792 CXXConstructorDecl* getConstructor() const { return Constructor; } 793 void setConstructor(CXXConstructorDecl *C) { Constructor = C; } 794 795 SourceLocation getLocation() const { return Loc; } 796 void setLocation(SourceLocation Loc) { this->Loc = Loc; } 797 798 /// \brief Whether this construction is elidable. 799 bool isElidable() const { return Elidable; } 800 void setElidable(bool E) { Elidable = E; } 801 802 /// \brief Whether this construction first requires 803 /// zero-initialization before the initializer is called. 804 bool requiresZeroInitialization() const { return ZeroInitialization; } 805 void setRequiresZeroInitialization(bool ZeroInit) { 806 ZeroInitialization = ZeroInit; 807 } 808 809 /// \brief Determines whether this constructor is actually constructing 810 /// a base class (rather than a complete object). 811 ConstructionKind getConstructionKind() const { 812 return (ConstructionKind)ConstructKind; 813 } 814 void setConstructionKind(ConstructionKind CK) { 815 ConstructKind = CK; 816 } 817 818 typedef ExprIterator arg_iterator; 819 typedef ConstExprIterator const_arg_iterator; 820 821 arg_iterator arg_begin() { return Args; } 822 arg_iterator arg_end() { return Args + NumArgs; } 823 const_arg_iterator arg_begin() const { return Args; } 824 const_arg_iterator arg_end() const { return Args + NumArgs; } 825 826 Expr **getArgs() const { return reinterpret_cast<Expr **>(Args); } 827 unsigned getNumArgs() const { return NumArgs; } 828 829 /// getArg - Return the specified argument. 830 Expr *getArg(unsigned Arg) { 831 assert(Arg < NumArgs && "Arg access out of range!"); 832 return cast<Expr>(Args[Arg]); 833 } 834 const Expr *getArg(unsigned Arg) const { 835 assert(Arg < NumArgs && "Arg access out of range!"); 836 return cast<Expr>(Args[Arg]); 837 } 838 839 /// setArg - Set the specified argument. 840 void setArg(unsigned Arg, Expr *ArgExpr) { 841 assert(Arg < NumArgs && "Arg access out of range!"); 842 Args[Arg] = ArgExpr; 843 } 844 845 virtual SourceRange getSourceRange() const; 846 SourceRange getParenRange() const { return ParenRange; } 847 848 static bool classof(const Stmt *T) { 849 return T->getStmtClass() == CXXConstructExprClass || 850 T->getStmtClass() == CXXTemporaryObjectExprClass; 851 } 852 static bool classof(const CXXConstructExpr *) { return true; } 853 854 // Iterators 855 virtual child_iterator child_begin(); 856 virtual child_iterator child_end(); 857 858 friend class ASTStmtReader; 859}; 860 861/// CXXFunctionalCastExpr - Represents an explicit C++ type conversion 862/// that uses "functional" notion (C++ [expr.type.conv]). Example: @c 863/// x = int(0.5); 864class CXXFunctionalCastExpr : public ExplicitCastExpr { 865 SourceLocation TyBeginLoc; 866 SourceLocation RParenLoc; 867 868 CXXFunctionalCastExpr(QualType ty, ExprValueKind VK, 869 TypeSourceInfo *writtenTy, 870 SourceLocation tyBeginLoc, CastKind kind, 871 Expr *castExpr, unsigned pathSize, 872 SourceLocation rParenLoc) 873 : ExplicitCastExpr(CXXFunctionalCastExprClass, ty, VK, kind, 874 castExpr, pathSize, writtenTy), 875 TyBeginLoc(tyBeginLoc), RParenLoc(rParenLoc) {} 876 877 explicit CXXFunctionalCastExpr(EmptyShell Shell, unsigned PathSize) 878 : ExplicitCastExpr(CXXFunctionalCastExprClass, Shell, PathSize) { } 879 880public: 881 static CXXFunctionalCastExpr *Create(ASTContext &Context, QualType T, 882 ExprValueKind VK, 883 TypeSourceInfo *Written, 884 SourceLocation TyBeginLoc, 885 CastKind Kind, Expr *Op, 886 const CXXCastPath *Path, 887 SourceLocation RPLoc); 888 static CXXFunctionalCastExpr *CreateEmpty(ASTContext &Context, 889 unsigned PathSize); 890 891 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 892 void setTypeBeginLoc(SourceLocation L) { TyBeginLoc = L; } 893 SourceLocation getRParenLoc() const { return RParenLoc; } 894 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 895 896 virtual SourceRange getSourceRange() const { 897 return SourceRange(TyBeginLoc, RParenLoc); 898 } 899 static bool classof(const Stmt *T) { 900 return T->getStmtClass() == CXXFunctionalCastExprClass; 901 } 902 static bool classof(const CXXFunctionalCastExpr *) { return true; } 903}; 904 905/// @brief Represents a C++ functional cast expression that builds a 906/// temporary object. 907/// 908/// This expression type represents a C++ "functional" cast 909/// (C++[expr.type.conv]) with N != 1 arguments that invokes a 910/// constructor to build a temporary object. With N == 1 arguments the 911/// functional cast expression will be represented by CXXFunctionalCastExpr. 912/// Example: 913/// @code 914/// struct X { X(int, float); } 915/// 916/// X create_X() { 917/// return X(1, 3.14f); // creates a CXXTemporaryObjectExpr 918/// }; 919/// @endcode 920class CXXTemporaryObjectExpr : public CXXConstructExpr { 921 TypeSourceInfo *Type; 922 923public: 924 CXXTemporaryObjectExpr(ASTContext &C, CXXConstructorDecl *Cons, 925 TypeSourceInfo *Type, 926 Expr **Args,unsigned NumArgs, 927 SourceRange parenRange, 928 bool ZeroInitialization = false); 929 explicit CXXTemporaryObjectExpr(EmptyShell Empty) 930 : CXXConstructExpr(CXXTemporaryObjectExprClass, Empty), Type() { } 931 932 TypeSourceInfo *getTypeSourceInfo() const { return Type; } 933 934 virtual SourceRange getSourceRange() const; 935 936 static bool classof(const Stmt *T) { 937 return T->getStmtClass() == CXXTemporaryObjectExprClass; 938 } 939 static bool classof(const CXXTemporaryObjectExpr *) { return true; } 940 941 friend class ASTStmtReader; 942}; 943 944/// CXXScalarValueInitExpr - [C++ 5.2.3p2] 945/// Expression "T()" which creates a value-initialized rvalue of type 946/// T, which is a non-class type. 947/// 948class CXXScalarValueInitExpr : public Expr { 949 SourceLocation RParenLoc; 950 TypeSourceInfo *TypeInfo; 951 952 friend class ASTStmtReader; 953 954public: 955 /// \brief Create an explicitly-written scalar-value initialization 956 /// expression. 957 CXXScalarValueInitExpr(QualType Type, 958 TypeSourceInfo *TypeInfo, 959 SourceLocation rParenLoc ) : 960 Expr(CXXScalarValueInitExprClass, Type, VK_RValue, OK_Ordinary, 961 false, false, false), 962 RParenLoc(rParenLoc), TypeInfo(TypeInfo) {} 963 964 explicit CXXScalarValueInitExpr(EmptyShell Shell) 965 : Expr(CXXScalarValueInitExprClass, Shell) { } 966 967 TypeSourceInfo *getTypeSourceInfo() const { 968 return TypeInfo; 969 } 970 971 SourceLocation getRParenLoc() const { return RParenLoc; } 972 973 virtual SourceRange getSourceRange() const; 974 975 static bool classof(const Stmt *T) { 976 return T->getStmtClass() == CXXScalarValueInitExprClass; 977 } 978 static bool classof(const CXXScalarValueInitExpr *) { return true; } 979 980 // Iterators 981 virtual child_iterator child_begin(); 982 virtual child_iterator child_end(); 983}; 984 985/// CXXNewExpr - A new expression for memory allocation and constructor calls, 986/// e.g: "new CXXNewExpr(foo)". 987class CXXNewExpr : public Expr { 988 // Was the usage ::new, i.e. is the global new to be used? 989 bool GlobalNew : 1; 990 // Is there an initializer? If not, built-ins are uninitialized, else they're 991 // value-initialized. 992 bool Initializer : 1; 993 // Do we allocate an array? If so, the first SubExpr is the size expression. 994 bool Array : 1; 995 // If this is an array allocation, does the usual deallocation 996 // function for the allocated type want to know the allocated size? 997 bool UsualArrayDeleteWantsSize : 1; 998 // The number of placement new arguments. 999 unsigned NumPlacementArgs : 14; 1000 // The number of constructor arguments. This may be 1 even for non-class 1001 // types; use the pseudo copy constructor. 1002 unsigned NumConstructorArgs : 14; 1003 // Contains an optional array size expression, any number of optional 1004 // placement arguments, and any number of optional constructor arguments, 1005 // in that order. 1006 Stmt **SubExprs; 1007 // Points to the allocation function used. 1008 FunctionDecl *OperatorNew; 1009 // Points to the deallocation function used in case of error. May be null. 1010 FunctionDecl *OperatorDelete; 1011 // Points to the constructor used. Cannot be null if AllocType is a record; 1012 // it would still point at the default constructor (even an implicit one). 1013 // Must be null for all other types. 1014 CXXConstructorDecl *Constructor; 1015 1016 /// \brief The allocated type-source information, as written in the source. 1017 TypeSourceInfo *AllocatedTypeInfo; 1018 1019 /// \brief If the allocated type was expressed as a parenthesized type-id, 1020 /// the source range covering the parenthesized type-id. 1021 SourceRange TypeIdParens; 1022 1023 SourceLocation StartLoc; 1024 SourceLocation EndLoc; 1025 SourceLocation ConstructorLParen; 1026 SourceLocation ConstructorRParen; 1027 1028 friend class ASTStmtReader; 1029public: 1030 CXXNewExpr(ASTContext &C, bool globalNew, FunctionDecl *operatorNew, 1031 Expr **placementArgs, unsigned numPlaceArgs, 1032 SourceRange TypeIdParens, 1033 Expr *arraySize, CXXConstructorDecl *constructor, bool initializer, 1034 Expr **constructorArgs, unsigned numConsArgs, 1035 FunctionDecl *operatorDelete, bool usualArrayDeleteWantsSize, 1036 QualType ty, TypeSourceInfo *AllocatedTypeInfo, 1037 SourceLocation startLoc, SourceLocation endLoc, 1038 SourceLocation constructorLParen, 1039 SourceLocation constructorRParen); 1040 explicit CXXNewExpr(EmptyShell Shell) 1041 : Expr(CXXNewExprClass, Shell), SubExprs(0) { } 1042 1043 void AllocateArgsArray(ASTContext &C, bool isArray, unsigned numPlaceArgs, 1044 unsigned numConsArgs); 1045 1046 QualType getAllocatedType() const { 1047 assert(getType()->isPointerType()); 1048 return getType()->getAs<PointerType>()->getPointeeType(); 1049 } 1050 1051 TypeSourceInfo *getAllocatedTypeSourceInfo() const { 1052 return AllocatedTypeInfo; 1053 } 1054 1055 FunctionDecl *getOperatorNew() const { return OperatorNew; } 1056 void setOperatorNew(FunctionDecl *D) { OperatorNew = D; } 1057 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 1058 void setOperatorDelete(FunctionDecl *D) { OperatorDelete = D; } 1059 CXXConstructorDecl *getConstructor() const { return Constructor; } 1060 void setConstructor(CXXConstructorDecl *D) { Constructor = D; } 1061 1062 bool isArray() const { return Array; } 1063 Expr *getArraySize() { 1064 return Array ? cast<Expr>(SubExprs[0]) : 0; 1065 } 1066 const Expr *getArraySize() const { 1067 return Array ? cast<Expr>(SubExprs[0]) : 0; 1068 } 1069 1070 unsigned getNumPlacementArgs() const { return NumPlacementArgs; } 1071 Expr **getPlacementArgs() { 1072 return reinterpret_cast<Expr **>(SubExprs + Array); 1073 } 1074 1075 Expr *getPlacementArg(unsigned i) { 1076 assert(i < NumPlacementArgs && "Index out of range"); 1077 return cast<Expr>(SubExprs[Array + i]); 1078 } 1079 const Expr *getPlacementArg(unsigned i) const { 1080 assert(i < NumPlacementArgs && "Index out of range"); 1081 return cast<Expr>(SubExprs[Array + i]); 1082 } 1083 1084 bool isParenTypeId() const { return TypeIdParens.isValid(); } 1085 SourceRange getTypeIdParens() const { return TypeIdParens; } 1086 1087 bool isGlobalNew() const { return GlobalNew; } 1088 bool hasInitializer() const { return Initializer; } 1089 1090 /// Answers whether the usual array deallocation function for the 1091 /// allocated type expects the size of the allocation as a 1092 /// parameter. 1093 bool doesUsualArrayDeleteWantSize() const { 1094 return UsualArrayDeleteWantsSize; 1095 } 1096 1097 unsigned getNumConstructorArgs() const { return NumConstructorArgs; } 1098 1099 Expr **getConstructorArgs() { 1100 return reinterpret_cast<Expr **>(SubExprs + Array + NumPlacementArgs); 1101 } 1102 1103 Expr *getConstructorArg(unsigned i) { 1104 assert(i < NumConstructorArgs && "Index out of range"); 1105 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 1106 } 1107 const Expr *getConstructorArg(unsigned i) const { 1108 assert(i < NumConstructorArgs && "Index out of range"); 1109 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 1110 } 1111 1112 typedef ExprIterator arg_iterator; 1113 typedef ConstExprIterator const_arg_iterator; 1114 1115 arg_iterator placement_arg_begin() { 1116 return SubExprs + Array; 1117 } 1118 arg_iterator placement_arg_end() { 1119 return SubExprs + Array + getNumPlacementArgs(); 1120 } 1121 const_arg_iterator placement_arg_begin() const { 1122 return SubExprs + Array; 1123 } 1124 const_arg_iterator placement_arg_end() const { 1125 return SubExprs + Array + getNumPlacementArgs(); 1126 } 1127 1128 arg_iterator constructor_arg_begin() { 1129 return SubExprs + Array + getNumPlacementArgs(); 1130 } 1131 arg_iterator constructor_arg_end() { 1132 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 1133 } 1134 const_arg_iterator constructor_arg_begin() const { 1135 return SubExprs + Array + getNumPlacementArgs(); 1136 } 1137 const_arg_iterator constructor_arg_end() const { 1138 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 1139 } 1140 1141 typedef Stmt **raw_arg_iterator; 1142 raw_arg_iterator raw_arg_begin() { return SubExprs; } 1143 raw_arg_iterator raw_arg_end() { 1144 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 1145 } 1146 const_arg_iterator raw_arg_begin() const { return SubExprs; } 1147 const_arg_iterator raw_arg_end() const { return constructor_arg_end(); } 1148 1149 SourceLocation getStartLoc() const { return StartLoc; } 1150 SourceLocation getEndLoc() const { return EndLoc; } 1151 1152 SourceLocation getConstructorLParen() const { return ConstructorLParen; } 1153 SourceLocation getConstructorRParen() const { return ConstructorRParen; } 1154 1155 virtual SourceRange getSourceRange() const { 1156 return SourceRange(StartLoc, EndLoc); 1157 } 1158 1159 static bool classof(const Stmt *T) { 1160 return T->getStmtClass() == CXXNewExprClass; 1161 } 1162 static bool classof(const CXXNewExpr *) { return true; } 1163 1164 // Iterators 1165 virtual child_iterator child_begin(); 1166 virtual child_iterator child_end(); 1167}; 1168 1169/// CXXDeleteExpr - A delete expression for memory deallocation and destructor 1170/// calls, e.g. "delete[] pArray". 1171class CXXDeleteExpr : public Expr { 1172 // Is this a forced global delete, i.e. "::delete"? 1173 bool GlobalDelete : 1; 1174 // Is this the array form of delete, i.e. "delete[]"? 1175 bool ArrayForm : 1; 1176 // ArrayFormAsWritten can be different from ArrayForm if 'delete' is applied 1177 // to pointer-to-array type (ArrayFormAsWritten will be false while ArrayForm 1178 // will be true). 1179 bool ArrayFormAsWritten : 1; 1180 // Does the usual deallocation function for the element type require 1181 // a size_t argument? 1182 bool UsualArrayDeleteWantsSize : 1; 1183 // Points to the operator delete overload that is used. Could be a member. 1184 FunctionDecl *OperatorDelete; 1185 // The pointer expression to be deleted. 1186 Stmt *Argument; 1187 // Location of the expression. 1188 SourceLocation Loc; 1189public: 1190 CXXDeleteExpr(QualType ty, bool globalDelete, bool arrayForm, 1191 bool arrayFormAsWritten, bool usualArrayDeleteWantsSize, 1192 FunctionDecl *operatorDelete, Expr *arg, SourceLocation loc) 1193 : Expr(CXXDeleteExprClass, ty, VK_RValue, OK_Ordinary, false, false, 1194 arg->containsUnexpandedParameterPack()), 1195 GlobalDelete(globalDelete), 1196 ArrayForm(arrayForm), ArrayFormAsWritten(arrayFormAsWritten), 1197 UsualArrayDeleteWantsSize(usualArrayDeleteWantsSize), 1198 OperatorDelete(operatorDelete), Argument(arg), Loc(loc) { } 1199 explicit CXXDeleteExpr(EmptyShell Shell) 1200 : Expr(CXXDeleteExprClass, Shell), OperatorDelete(0), Argument(0) { } 1201 1202 bool isGlobalDelete() const { return GlobalDelete; } 1203 bool isArrayForm() const { return ArrayForm; } 1204 bool isArrayFormAsWritten() const { return ArrayFormAsWritten; } 1205 1206 /// Answers whether the usual array deallocation function for the 1207 /// allocated type expects the size of the allocation as a 1208 /// parameter. This can be true even if the actual deallocation 1209 /// function that we're using doesn't want a size. 1210 bool doesUsualArrayDeleteWantSize() const { 1211 return UsualArrayDeleteWantsSize; 1212 } 1213 1214 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 1215 1216 Expr *getArgument() { return cast<Expr>(Argument); } 1217 const Expr *getArgument() const { return cast<Expr>(Argument); } 1218 1219 /// \brief Retrieve the type being destroyed. If the type being 1220 /// destroyed is a dependent type which may or may not be a pointer, 1221 /// return an invalid type. 1222 QualType getDestroyedType() const; 1223 1224 virtual SourceRange getSourceRange() const { 1225 return SourceRange(Loc, Argument->getLocEnd()); 1226 } 1227 1228 static bool classof(const Stmt *T) { 1229 return T->getStmtClass() == CXXDeleteExprClass; 1230 } 1231 static bool classof(const CXXDeleteExpr *) { return true; } 1232 1233 // Iterators 1234 virtual child_iterator child_begin(); 1235 virtual child_iterator child_end(); 1236 1237 friend class ASTStmtReader; 1238}; 1239 1240/// \brief Structure used to store the type being destroyed by a 1241/// pseudo-destructor expression. 1242class PseudoDestructorTypeStorage { 1243 /// \brief Either the type source information or the name of the type, if 1244 /// it couldn't be resolved due to type-dependence. 1245 llvm::PointerUnion<TypeSourceInfo *, IdentifierInfo *> Type; 1246 1247 /// \brief The starting source location of the pseudo-destructor type. 1248 SourceLocation Location; 1249 1250public: 1251 PseudoDestructorTypeStorage() { } 1252 1253 PseudoDestructorTypeStorage(IdentifierInfo *II, SourceLocation Loc) 1254 : Type(II), Location(Loc) { } 1255 1256 PseudoDestructorTypeStorage(TypeSourceInfo *Info); 1257 1258 TypeSourceInfo *getTypeSourceInfo() const { 1259 return Type.dyn_cast<TypeSourceInfo *>(); 1260 } 1261 1262 IdentifierInfo *getIdentifier() const { 1263 return Type.dyn_cast<IdentifierInfo *>(); 1264 } 1265 1266 SourceLocation getLocation() const { return Location; } 1267}; 1268 1269/// \brief Represents a C++ pseudo-destructor (C++ [expr.pseudo]). 1270/// 1271/// A pseudo-destructor is an expression that looks like a member access to a 1272/// destructor of a scalar type, except that scalar types don't have 1273/// destructors. For example: 1274/// 1275/// \code 1276/// typedef int T; 1277/// void f(int *p) { 1278/// p->T::~T(); 1279/// } 1280/// \endcode 1281/// 1282/// Pseudo-destructors typically occur when instantiating templates such as: 1283/// 1284/// \code 1285/// template<typename T> 1286/// void destroy(T* ptr) { 1287/// ptr->T::~T(); 1288/// } 1289/// \endcode 1290/// 1291/// for scalar types. A pseudo-destructor expression has no run-time semantics 1292/// beyond evaluating the base expression. 1293class CXXPseudoDestructorExpr : public Expr { 1294 /// \brief The base expression (that is being destroyed). 1295 Stmt *Base; 1296 1297 /// \brief Whether the operator was an arrow ('->'); otherwise, it was a 1298 /// period ('.'). 1299 bool IsArrow : 1; 1300 1301 /// \brief The location of the '.' or '->' operator. 1302 SourceLocation OperatorLoc; 1303 1304 /// \brief The nested-name-specifier that follows the operator, if present. 1305 NestedNameSpecifier *Qualifier; 1306 1307 /// \brief The source range that covers the nested-name-specifier, if 1308 /// present. 1309 SourceRange QualifierRange; 1310 1311 /// \brief The type that precedes the '::' in a qualified pseudo-destructor 1312 /// expression. 1313 TypeSourceInfo *ScopeType; 1314 1315 /// \brief The location of the '::' in a qualified pseudo-destructor 1316 /// expression. 1317 SourceLocation ColonColonLoc; 1318 1319 /// \brief The location of the '~'. 1320 SourceLocation TildeLoc; 1321 1322 /// \brief The type being destroyed, or its name if we were unable to 1323 /// resolve the name. 1324 PseudoDestructorTypeStorage DestroyedType; 1325 1326public: 1327 CXXPseudoDestructorExpr(ASTContext &Context, 1328 Expr *Base, bool isArrow, SourceLocation OperatorLoc, 1329 NestedNameSpecifier *Qualifier, 1330 SourceRange QualifierRange, 1331 TypeSourceInfo *ScopeType, 1332 SourceLocation ColonColonLoc, 1333 SourceLocation TildeLoc, 1334 PseudoDestructorTypeStorage DestroyedType); 1335 1336 explicit CXXPseudoDestructorExpr(EmptyShell Shell) 1337 : Expr(CXXPseudoDestructorExprClass, Shell), 1338 Base(0), IsArrow(false), Qualifier(0), ScopeType(0) { } 1339 1340 void setBase(Expr *E) { Base = E; } 1341 Expr *getBase() const { return cast<Expr>(Base); } 1342 1343 /// \brief Determines whether this member expression actually had 1344 /// a C++ nested-name-specifier prior to the name of the member, e.g., 1345 /// x->Base::foo. 1346 bool hasQualifier() const { return Qualifier != 0; } 1347 1348 /// \brief If the member name was qualified, retrieves the source range of 1349 /// the nested-name-specifier that precedes the member name. Otherwise, 1350 /// returns an empty source range. 1351 SourceRange getQualifierRange() const { return QualifierRange; } 1352 void setQualifierRange(SourceRange R) { QualifierRange = R; } 1353 1354 /// \brief If the member name was qualified, retrieves the 1355 /// nested-name-specifier that precedes the member name. Otherwise, returns 1356 /// NULL. 1357 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1358 void setQualifier(NestedNameSpecifier *NNS) { Qualifier = NNS; } 1359 1360 /// \brief Determine whether this pseudo-destructor expression was written 1361 /// using an '->' (otherwise, it used a '.'). 1362 bool isArrow() const { return IsArrow; } 1363 void setArrow(bool A) { IsArrow = A; } 1364 1365 /// \brief Retrieve the location of the '.' or '->' operator. 1366 SourceLocation getOperatorLoc() const { return OperatorLoc; } 1367 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 1368 1369 /// \brief Retrieve the scope type in a qualified pseudo-destructor 1370 /// expression. 1371 /// 1372 /// Pseudo-destructor expressions can have extra qualification within them 1373 /// that is not part of the nested-name-specifier, e.g., \c p->T::~T(). 1374 /// Here, if the object type of the expression is (or may be) a scalar type, 1375 /// \p T may also be a scalar type and, therefore, cannot be part of a 1376 /// nested-name-specifier. It is stored as the "scope type" of the pseudo- 1377 /// destructor expression. 1378 TypeSourceInfo *getScopeTypeInfo() const { return ScopeType; } 1379 void setScopeTypeInfo(TypeSourceInfo *Info) { ScopeType = Info; } 1380 1381 /// \brief Retrieve the location of the '::' in a qualified pseudo-destructor 1382 /// expression. 1383 SourceLocation getColonColonLoc() const { return ColonColonLoc; } 1384 void setColonColonLoc(SourceLocation L) { ColonColonLoc = L; } 1385 1386 /// \brief Retrieve the location of the '~'. 1387 SourceLocation getTildeLoc() const { return TildeLoc; } 1388 void setTildeLoc(SourceLocation L) { TildeLoc = L; } 1389 1390 /// \brief Retrieve the source location information for the type 1391 /// being destroyed. 1392 /// 1393 /// This type-source information is available for non-dependent 1394 /// pseudo-destructor expressions and some dependent pseudo-destructor 1395 /// expressions. Returns NULL if we only have the identifier for a 1396 /// dependent pseudo-destructor expression. 1397 TypeSourceInfo *getDestroyedTypeInfo() const { 1398 return DestroyedType.getTypeSourceInfo(); 1399 } 1400 1401 /// \brief In a dependent pseudo-destructor expression for which we do not 1402 /// have full type information on the destroyed type, provides the name 1403 /// of the destroyed type. 1404 IdentifierInfo *getDestroyedTypeIdentifier() const { 1405 return DestroyedType.getIdentifier(); 1406 } 1407 1408 /// \brief Retrieve the type being destroyed. 1409 QualType getDestroyedType() const; 1410 1411 /// \brief Retrieve the starting location of the type being destroyed. 1412 SourceLocation getDestroyedTypeLoc() const { 1413 return DestroyedType.getLocation(); 1414 } 1415 1416 /// \brief Set the name of destroyed type for a dependent pseudo-destructor 1417 /// expression. 1418 void setDestroyedType(IdentifierInfo *II, SourceLocation Loc) { 1419 DestroyedType = PseudoDestructorTypeStorage(II, Loc); 1420 } 1421 1422 /// \brief Set the destroyed type. 1423 void setDestroyedType(TypeSourceInfo *Info) { 1424 DestroyedType = PseudoDestructorTypeStorage(Info); 1425 } 1426 1427 virtual SourceRange getSourceRange() const; 1428 1429 static bool classof(const Stmt *T) { 1430 return T->getStmtClass() == CXXPseudoDestructorExprClass; 1431 } 1432 static bool classof(const CXXPseudoDestructorExpr *) { return true; } 1433 1434 // Iterators 1435 virtual child_iterator child_begin(); 1436 virtual child_iterator child_end(); 1437}; 1438 1439/// UnaryTypeTraitExpr - A GCC or MS unary type trait, as used in the 1440/// implementation of TR1/C++0x type trait templates. 1441/// Example: 1442/// __is_pod(int) == true 1443/// __is_enum(std::string) == false 1444class UnaryTypeTraitExpr : public Expr { 1445 /// UTT - The trait. A UnaryTypeTrait enum in MSVC compat unsigned. 1446 unsigned UTT : 31; 1447 /// The value of the type trait. Unspecified if dependent. 1448 bool Value : 1; 1449 1450 /// Loc - The location of the type trait keyword. 1451 SourceLocation Loc; 1452 1453 /// RParen - The location of the closing paren. 1454 SourceLocation RParen; 1455 1456 /// The type being queried. 1457 TypeSourceInfo *QueriedType; 1458 1459public: 1460 UnaryTypeTraitExpr(SourceLocation loc, UnaryTypeTrait utt, 1461 TypeSourceInfo *queried, bool value, 1462 SourceLocation rparen, QualType ty) 1463 : Expr(UnaryTypeTraitExprClass, ty, VK_RValue, OK_Ordinary, 1464 false, queried->getType()->isDependentType(), 1465 queried->getType()->containsUnexpandedParameterPack()), 1466 UTT(utt), Value(value), Loc(loc), RParen(rparen), QueriedType(queried) { } 1467 1468 explicit UnaryTypeTraitExpr(EmptyShell Empty) 1469 : Expr(UnaryTypeTraitExprClass, Empty), UTT(0), Value(false), 1470 QueriedType() { } 1471 1472 virtual SourceRange getSourceRange() const { return SourceRange(Loc, RParen);} 1473 1474 UnaryTypeTrait getTrait() const { return static_cast<UnaryTypeTrait>(UTT); } 1475 1476 QualType getQueriedType() const { return QueriedType->getType(); } 1477 1478 TypeSourceInfo *getQueriedTypeSourceInfo() const { return QueriedType; } 1479 1480 bool getValue() const { return Value; } 1481 1482 static bool classof(const Stmt *T) { 1483 return T->getStmtClass() == UnaryTypeTraitExprClass; 1484 } 1485 static bool classof(const UnaryTypeTraitExpr *) { return true; } 1486 1487 // Iterators 1488 virtual child_iterator child_begin(); 1489 virtual child_iterator child_end(); 1490 1491 friend class ASTStmtReader; 1492}; 1493 1494/// BinaryTypeTraitExpr - A GCC or MS binary type trait, as used in the 1495/// implementation of TR1/C++0x type trait templates. 1496/// Example: 1497/// __is_base_of(Base, Derived) == true 1498class BinaryTypeTraitExpr : public Expr { 1499 /// BTT - The trait. A BinaryTypeTrait enum in MSVC compat unsigned. 1500 unsigned BTT : 8; 1501 1502 /// The value of the type trait. Unspecified if dependent. 1503 bool Value : 1; 1504 1505 /// Loc - The location of the type trait keyword. 1506 SourceLocation Loc; 1507 1508 /// RParen - The location of the closing paren. 1509 SourceLocation RParen; 1510 1511 /// The lhs type being queried. 1512 TypeSourceInfo *LhsType; 1513 1514 /// The rhs type being queried. 1515 TypeSourceInfo *RhsType; 1516 1517public: 1518 BinaryTypeTraitExpr(SourceLocation loc, BinaryTypeTrait btt, 1519 TypeSourceInfo *lhsType, TypeSourceInfo *rhsType, 1520 bool value, SourceLocation rparen, QualType ty) 1521 : Expr(BinaryTypeTraitExprClass, ty, VK_RValue, OK_Ordinary, false, 1522 lhsType->getType()->isDependentType() || 1523 rhsType->getType()->isDependentType(), 1524 (lhsType->getType()->containsUnexpandedParameterPack() || 1525 rhsType->getType()->containsUnexpandedParameterPack())), 1526 BTT(btt), Value(value), Loc(loc), RParen(rparen), 1527 LhsType(lhsType), RhsType(rhsType) { } 1528 1529 1530 explicit BinaryTypeTraitExpr(EmptyShell Empty) 1531 : Expr(BinaryTypeTraitExprClass, Empty), BTT(0), Value(false), 1532 LhsType(), RhsType() { } 1533 1534 virtual SourceRange getSourceRange() const { 1535 return SourceRange(Loc, RParen); 1536 } 1537 1538 BinaryTypeTrait getTrait() const { 1539 return static_cast<BinaryTypeTrait>(BTT); 1540 } 1541 1542 QualType getLhsType() const { return LhsType->getType(); } 1543 QualType getRhsType() const { return RhsType->getType(); } 1544 1545 TypeSourceInfo *getLhsTypeSourceInfo() const { return LhsType; } 1546 TypeSourceInfo *getRhsTypeSourceInfo() const { return RhsType; } 1547 1548 bool getValue() const { assert(!isTypeDependent()); return Value; } 1549 1550 static bool classof(const Stmt *T) { 1551 return T->getStmtClass() == BinaryTypeTraitExprClass; 1552 } 1553 static bool classof(const BinaryTypeTraitExpr *) { return true; } 1554 1555 // Iterators 1556 virtual child_iterator child_begin(); 1557 virtual child_iterator child_end(); 1558 1559 friend class ASTStmtReader; 1560}; 1561 1562/// \brief A reference to an overloaded function set, either an 1563/// \t UnresolvedLookupExpr or an \t UnresolvedMemberExpr. 1564class OverloadExpr : public Expr { 1565 /// The results. These are undesugared, which is to say, they may 1566 /// include UsingShadowDecls. Access is relative to the naming 1567 /// class. 1568 // FIXME: Allocate this data after the OverloadExpr subclass. 1569 DeclAccessPair *Results; 1570 unsigned NumResults; 1571 1572 /// The common name of these declarations. 1573 DeclarationNameInfo NameInfo; 1574 1575 /// The scope specifier, if any. 1576 NestedNameSpecifier *Qualifier; 1577 1578 /// The source range of the scope specifier. 1579 SourceRange QualifierRange; 1580 1581protected: 1582 /// True if the name was a template-id. 1583 bool HasExplicitTemplateArgs; 1584 1585 OverloadExpr(StmtClass K, ASTContext &C, 1586 NestedNameSpecifier *Qualifier, SourceRange QRange, 1587 const DeclarationNameInfo &NameInfo, 1588 const TemplateArgumentListInfo *TemplateArgs, 1589 UnresolvedSetIterator Begin, UnresolvedSetIterator End, 1590 bool KnownDependent = false, 1591 bool KnownContainsUnexpandedParameterPack = false); 1592 1593 OverloadExpr(StmtClass K, EmptyShell Empty) 1594 : Expr(K, Empty), Results(0), NumResults(0), 1595 Qualifier(0), HasExplicitTemplateArgs(false) { } 1596 1597 void initializeResults(ASTContext &C, 1598 UnresolvedSetIterator Begin, 1599 UnresolvedSetIterator End); 1600 1601public: 1602 struct FindResult { 1603 OverloadExpr *Expression; 1604 bool IsAddressOfOperand; 1605 bool HasFormOfMemberPointer; 1606 }; 1607 1608 /// Finds the overloaded expression in the given expression of 1609 /// OverloadTy. 1610 /// 1611 /// \return the expression (which must be there) and true if it has 1612 /// the particular form of a member pointer expression 1613 static FindResult find(Expr *E) { 1614 assert(E->getType()->isSpecificBuiltinType(BuiltinType::Overload)); 1615 1616 FindResult Result; 1617 1618 E = E->IgnoreParens(); 1619 if (isa<UnaryOperator>(E)) { 1620 assert(cast<UnaryOperator>(E)->getOpcode() == UO_AddrOf); 1621 E = cast<UnaryOperator>(E)->getSubExpr(); 1622 OverloadExpr *Ovl = cast<OverloadExpr>(E->IgnoreParens()); 1623 1624 Result.HasFormOfMemberPointer = (E == Ovl && Ovl->getQualifier()); 1625 Result.IsAddressOfOperand = true; 1626 Result.Expression = Ovl; 1627 } else { 1628 Result.HasFormOfMemberPointer = false; 1629 Result.IsAddressOfOperand = false; 1630 Result.Expression = cast<OverloadExpr>(E); 1631 } 1632 1633 return Result; 1634 } 1635 1636 /// Gets the naming class of this lookup, if any. 1637 CXXRecordDecl *getNamingClass() const; 1638 1639 typedef UnresolvedSetImpl::iterator decls_iterator; 1640 decls_iterator decls_begin() const { return UnresolvedSetIterator(Results); } 1641 decls_iterator decls_end() const { 1642 return UnresolvedSetIterator(Results + NumResults); 1643 } 1644 1645 /// Gets the number of declarations in the unresolved set. 1646 unsigned getNumDecls() const { return NumResults; } 1647 1648 /// Gets the full name info. 1649 const DeclarationNameInfo &getNameInfo() const { return NameInfo; } 1650 void setNameInfo(const DeclarationNameInfo &N) { NameInfo = N; } 1651 1652 /// Gets the name looked up. 1653 DeclarationName getName() const { return NameInfo.getName(); } 1654 void setName(DeclarationName N) { NameInfo.setName(N); } 1655 1656 /// Gets the location of the name. 1657 SourceLocation getNameLoc() const { return NameInfo.getLoc(); } 1658 void setNameLoc(SourceLocation Loc) { NameInfo.setLoc(Loc); } 1659 1660 /// Fetches the nested-name qualifier, if one was given. 1661 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1662 void setQualifier(NestedNameSpecifier *NNS) { Qualifier = NNS; } 1663 1664 /// Fetches the range of the nested-name qualifier. 1665 SourceRange getQualifierRange() const { return QualifierRange; } 1666 void setQualifierRange(SourceRange R) { QualifierRange = R; } 1667 1668 /// \brief Determines whether this expression had an explicit 1669 /// template argument list, e.g. f<int>. 1670 bool hasExplicitTemplateArgs() const { return HasExplicitTemplateArgs; } 1671 1672 ExplicitTemplateArgumentList &getExplicitTemplateArgs(); // defined far below 1673 1674 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1675 return const_cast<OverloadExpr*>(this)->getExplicitTemplateArgs(); 1676 } 1677 1678 /// \brief Retrieves the optional explicit template arguments. 1679 /// This points to the same data as getExplicitTemplateArgs(), but 1680 /// returns null if there are no explicit template arguments. 1681 const ExplicitTemplateArgumentList *getOptionalExplicitTemplateArgs() { 1682 if (!hasExplicitTemplateArgs()) return 0; 1683 return &getExplicitTemplateArgs(); 1684 } 1685 1686 static bool classof(const Stmt *T) { 1687 return T->getStmtClass() == UnresolvedLookupExprClass || 1688 T->getStmtClass() == UnresolvedMemberExprClass; 1689 } 1690 static bool classof(const OverloadExpr *) { return true; } 1691 1692 friend class ASTStmtReader; 1693 friend class ASTStmtWriter; 1694}; 1695 1696/// \brief A reference to a name which we were able to look up during 1697/// parsing but could not resolve to a specific declaration. This 1698/// arises in several ways: 1699/// * we might be waiting for argument-dependent lookup 1700/// * the name might resolve to an overloaded function 1701/// and eventually: 1702/// * the lookup might have included a function template 1703/// These never include UnresolvedUsingValueDecls, which are always 1704/// class members and therefore appear only in 1705/// UnresolvedMemberLookupExprs. 1706class UnresolvedLookupExpr : public OverloadExpr { 1707 /// True if these lookup results should be extended by 1708 /// argument-dependent lookup if this is the operand of a function 1709 /// call. 1710 bool RequiresADL; 1711 1712 /// True if these lookup results are overloaded. This is pretty 1713 /// trivially rederivable if we urgently need to kill this field. 1714 bool Overloaded; 1715 1716 /// The naming class (C++ [class.access.base]p5) of the lookup, if 1717 /// any. This can generally be recalculated from the context chain, 1718 /// but that can be fairly expensive for unqualified lookups. If we 1719 /// want to improve memory use here, this could go in a union 1720 /// against the qualified-lookup bits. 1721 CXXRecordDecl *NamingClass; 1722 1723 UnresolvedLookupExpr(ASTContext &C, 1724 CXXRecordDecl *NamingClass, 1725 NestedNameSpecifier *Qualifier, SourceRange QRange, 1726 const DeclarationNameInfo &NameInfo, 1727 bool RequiresADL, bool Overloaded, 1728 const TemplateArgumentListInfo *TemplateArgs, 1729 UnresolvedSetIterator Begin, UnresolvedSetIterator End) 1730 : OverloadExpr(UnresolvedLookupExprClass, C, Qualifier, QRange, NameInfo, 1731 TemplateArgs, Begin, End), 1732 RequiresADL(RequiresADL), Overloaded(Overloaded), NamingClass(NamingClass) 1733 {} 1734 1735 UnresolvedLookupExpr(EmptyShell Empty) 1736 : OverloadExpr(UnresolvedLookupExprClass, Empty), 1737 RequiresADL(false), Overloaded(false), NamingClass(0) 1738 {} 1739 1740public: 1741 static UnresolvedLookupExpr *Create(ASTContext &C, 1742 CXXRecordDecl *NamingClass, 1743 NestedNameSpecifier *Qualifier, 1744 SourceRange QualifierRange, 1745 const DeclarationNameInfo &NameInfo, 1746 bool ADL, bool Overloaded, 1747 UnresolvedSetIterator Begin, 1748 UnresolvedSetIterator End) { 1749 return new(C) UnresolvedLookupExpr(C, NamingClass, Qualifier, 1750 QualifierRange, NameInfo, ADL, 1751 Overloaded, 0, Begin, End); 1752 } 1753 1754 static UnresolvedLookupExpr *Create(ASTContext &C, 1755 CXXRecordDecl *NamingClass, 1756 NestedNameSpecifier *Qualifier, 1757 SourceRange QualifierRange, 1758 const DeclarationNameInfo &NameInfo, 1759 bool ADL, 1760 const TemplateArgumentListInfo &Args, 1761 UnresolvedSetIterator Begin, 1762 UnresolvedSetIterator End); 1763 1764 static UnresolvedLookupExpr *CreateEmpty(ASTContext &C, 1765 bool HasExplicitTemplateArgs, 1766 unsigned NumTemplateArgs); 1767 1768 /// True if this declaration should be extended by 1769 /// argument-dependent lookup. 1770 bool requiresADL() const { return RequiresADL; } 1771 void setRequiresADL(bool V) { RequiresADL = V; } 1772 1773 /// True if this lookup is overloaded. 1774 bool isOverloaded() const { return Overloaded; } 1775 void setOverloaded(bool V) { Overloaded = V; } 1776 1777 /// Gets the 'naming class' (in the sense of C++0x 1778 /// [class.access.base]p5) of the lookup. This is the scope 1779 /// that was looked in to find these results. 1780 CXXRecordDecl *getNamingClass() const { return NamingClass; } 1781 void setNamingClass(CXXRecordDecl *D) { NamingClass = D; } 1782 1783 // Note that, inconsistently with the explicit-template-argument AST 1784 // nodes, users are *forbidden* from calling these methods on objects 1785 // without explicit template arguments. 1786 1787 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 1788 assert(hasExplicitTemplateArgs()); 1789 return *reinterpret_cast<ExplicitTemplateArgumentList*>(this + 1); 1790 } 1791 1792 /// Gets a reference to the explicit template argument list. 1793 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1794 assert(hasExplicitTemplateArgs()); 1795 return *reinterpret_cast<const ExplicitTemplateArgumentList*>(this + 1); 1796 } 1797 1798 /// \brief Retrieves the optional explicit template arguments. 1799 /// This points to the same data as getExplicitTemplateArgs(), but 1800 /// returns null if there are no explicit template arguments. 1801 const ExplicitTemplateArgumentList *getOptionalExplicitTemplateArgs() { 1802 if (!hasExplicitTemplateArgs()) return 0; 1803 return &getExplicitTemplateArgs(); 1804 } 1805 1806 /// \brief Copies the template arguments (if present) into the given 1807 /// structure. 1808 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1809 getExplicitTemplateArgs().copyInto(List); 1810 } 1811 1812 SourceLocation getLAngleLoc() const { 1813 return getExplicitTemplateArgs().LAngleLoc; 1814 } 1815 1816 SourceLocation getRAngleLoc() const { 1817 return getExplicitTemplateArgs().RAngleLoc; 1818 } 1819 1820 TemplateArgumentLoc const *getTemplateArgs() const { 1821 return getExplicitTemplateArgs().getTemplateArgs(); 1822 } 1823 1824 unsigned getNumTemplateArgs() const { 1825 return getExplicitTemplateArgs().NumTemplateArgs; 1826 } 1827 1828 virtual SourceRange getSourceRange() const { 1829 SourceRange Range(getNameInfo().getSourceRange()); 1830 if (getQualifier()) Range.setBegin(getQualifierRange().getBegin()); 1831 if (hasExplicitTemplateArgs()) Range.setEnd(getRAngleLoc()); 1832 return Range; 1833 } 1834 1835 virtual StmtIterator child_begin(); 1836 virtual StmtIterator child_end(); 1837 1838 static bool classof(const Stmt *T) { 1839 return T->getStmtClass() == UnresolvedLookupExprClass; 1840 } 1841 static bool classof(const UnresolvedLookupExpr *) { return true; } 1842}; 1843 1844/// \brief A qualified reference to a name whose declaration cannot 1845/// yet be resolved. 1846/// 1847/// DependentScopeDeclRefExpr is similar to DeclRefExpr in that 1848/// it expresses a reference to a declaration such as 1849/// X<T>::value. The difference, however, is that an 1850/// DependentScopeDeclRefExpr node is used only within C++ templates when 1851/// the qualification (e.g., X<T>::) refers to a dependent type. In 1852/// this case, X<T>::value cannot resolve to a declaration because the 1853/// declaration will differ from on instantiation of X<T> to the 1854/// next. Therefore, DependentScopeDeclRefExpr keeps track of the 1855/// qualifier (X<T>::) and the name of the entity being referenced 1856/// ("value"). Such expressions will instantiate to a DeclRefExpr once the 1857/// declaration can be found. 1858class DependentScopeDeclRefExpr : public Expr { 1859 /// The name of the entity we will be referencing. 1860 DeclarationNameInfo NameInfo; 1861 1862 /// QualifierRange - The source range that covers the 1863 /// nested-name-specifier. 1864 SourceRange QualifierRange; 1865 1866 /// \brief The nested-name-specifier that qualifies this unresolved 1867 /// declaration name. 1868 NestedNameSpecifier *Qualifier; 1869 1870 /// \brief Whether the name includes explicit template arguments. 1871 bool HasExplicitTemplateArgs; 1872 1873 DependentScopeDeclRefExpr(QualType T, 1874 NestedNameSpecifier *Qualifier, 1875 SourceRange QualifierRange, 1876 const DeclarationNameInfo &NameInfo, 1877 const TemplateArgumentListInfo *Args); 1878 1879public: 1880 static DependentScopeDeclRefExpr *Create(ASTContext &C, 1881 NestedNameSpecifier *Qualifier, 1882 SourceRange QualifierRange, 1883 const DeclarationNameInfo &NameInfo, 1884 const TemplateArgumentListInfo *TemplateArgs = 0); 1885 1886 static DependentScopeDeclRefExpr *CreateEmpty(ASTContext &C, 1887 bool HasExplicitTemplateArgs, 1888 unsigned NumTemplateArgs); 1889 1890 /// \brief Retrieve the name that this expression refers to. 1891 const DeclarationNameInfo &getNameInfo() const { return NameInfo; } 1892 void setNameInfo(const DeclarationNameInfo &N) { NameInfo = N; } 1893 1894 /// \brief Retrieve the name that this expression refers to. 1895 DeclarationName getDeclName() const { return NameInfo.getName(); } 1896 void setDeclName(DeclarationName N) { NameInfo.setName(N); } 1897 1898 /// \brief Retrieve the location of the name within the expression. 1899 SourceLocation getLocation() const { return NameInfo.getLoc(); } 1900 void setLocation(SourceLocation L) { NameInfo.setLoc(L); } 1901 1902 /// \brief Retrieve the source range of the nested-name-specifier. 1903 SourceRange getQualifierRange() const { return QualifierRange; } 1904 void setQualifierRange(SourceRange R) { QualifierRange = R; } 1905 1906 /// \brief Retrieve the nested-name-specifier that qualifies this 1907 /// declaration. 1908 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1909 void setQualifier(NestedNameSpecifier *NNS) { Qualifier = NNS; } 1910 1911 /// Determines whether this lookup had explicit template arguments. 1912 bool hasExplicitTemplateArgs() const { return HasExplicitTemplateArgs; } 1913 1914 // Note that, inconsistently with the explicit-template-argument AST 1915 // nodes, users are *forbidden* from calling these methods on objects 1916 // without explicit template arguments. 1917 1918 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 1919 assert(hasExplicitTemplateArgs()); 1920 return *reinterpret_cast<ExplicitTemplateArgumentList*>(this + 1); 1921 } 1922 1923 /// Gets a reference to the explicit template argument list. 1924 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1925 assert(hasExplicitTemplateArgs()); 1926 return *reinterpret_cast<const ExplicitTemplateArgumentList*>(this + 1); 1927 } 1928 1929 /// \brief Retrieves the optional explicit template arguments. 1930 /// This points to the same data as getExplicitTemplateArgs(), but 1931 /// returns null if there are no explicit template arguments. 1932 const ExplicitTemplateArgumentList *getOptionalExplicitTemplateArgs() { 1933 if (!hasExplicitTemplateArgs()) return 0; 1934 return &getExplicitTemplateArgs(); 1935 } 1936 1937 /// \brief Copies the template arguments (if present) into the given 1938 /// structure. 1939 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1940 getExplicitTemplateArgs().copyInto(List); 1941 } 1942 1943 SourceLocation getLAngleLoc() const { 1944 return getExplicitTemplateArgs().LAngleLoc; 1945 } 1946 1947 SourceLocation getRAngleLoc() const { 1948 return getExplicitTemplateArgs().RAngleLoc; 1949 } 1950 1951 TemplateArgumentLoc const *getTemplateArgs() const { 1952 return getExplicitTemplateArgs().getTemplateArgs(); 1953 } 1954 1955 unsigned getNumTemplateArgs() const { 1956 return getExplicitTemplateArgs().NumTemplateArgs; 1957 } 1958 1959 virtual SourceRange getSourceRange() const { 1960 SourceRange Range(QualifierRange.getBegin(), getLocation()); 1961 if (hasExplicitTemplateArgs()) 1962 Range.setEnd(getRAngleLoc()); 1963 return Range; 1964 } 1965 1966 static bool classof(const Stmt *T) { 1967 return T->getStmtClass() == DependentScopeDeclRefExprClass; 1968 } 1969 static bool classof(const DependentScopeDeclRefExpr *) { return true; } 1970 1971 virtual StmtIterator child_begin(); 1972 virtual StmtIterator child_end(); 1973 1974 friend class ASTStmtReader; 1975 friend class ASTStmtWriter; 1976}; 1977 1978/// Represents an expression --- generally a full-expression --- which 1979/// introduces cleanups to be run at the end of the sub-expression's 1980/// evaluation. The most common source of expression-introduced 1981/// cleanups is temporary objects in C++, but several other C++ 1982/// expressions can create cleanups. 1983class ExprWithCleanups : public Expr { 1984 Stmt *SubExpr; 1985 1986 CXXTemporary **Temps; 1987 unsigned NumTemps; 1988 1989 ExprWithCleanups(ASTContext &C, Expr *SubExpr, 1990 CXXTemporary **Temps, unsigned NumTemps); 1991 1992public: 1993 ExprWithCleanups(EmptyShell Empty) 1994 : Expr(ExprWithCleanupsClass, Empty), 1995 SubExpr(0), Temps(0), NumTemps(0) {} 1996 1997 static ExprWithCleanups *Create(ASTContext &C, Expr *SubExpr, 1998 CXXTemporary **Temps, 1999 unsigned NumTemps); 2000 2001 unsigned getNumTemporaries() const { return NumTemps; } 2002 void setNumTemporaries(ASTContext &C, unsigned N); 2003 2004 CXXTemporary *getTemporary(unsigned i) { 2005 assert(i < NumTemps && "Index out of range"); 2006 return Temps[i]; 2007 } 2008 const CXXTemporary *getTemporary(unsigned i) const { 2009 return const_cast<ExprWithCleanups*>(this)->getTemporary(i); 2010 } 2011 void setTemporary(unsigned i, CXXTemporary *T) { 2012 assert(i < NumTemps && "Index out of range"); 2013 Temps[i] = T; 2014 } 2015 2016 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 2017 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 2018 void setSubExpr(Expr *E) { SubExpr = E; } 2019 2020 virtual SourceRange getSourceRange() const { 2021 return SubExpr->getSourceRange(); 2022 } 2023 2024 // Implement isa/cast/dyncast/etc. 2025 static bool classof(const Stmt *T) { 2026 return T->getStmtClass() == ExprWithCleanupsClass; 2027 } 2028 static bool classof(const ExprWithCleanups *) { return true; } 2029 2030 // Iterators 2031 virtual child_iterator child_begin(); 2032 virtual child_iterator child_end(); 2033}; 2034 2035/// \brief Describes an explicit type conversion that uses functional 2036/// notion but could not be resolved because one or more arguments are 2037/// type-dependent. 2038/// 2039/// The explicit type conversions expressed by 2040/// CXXUnresolvedConstructExpr have the form \c T(a1, a2, ..., aN), 2041/// where \c T is some type and \c a1, a2, ..., aN are values, and 2042/// either \C T is a dependent type or one or more of the \c a's is 2043/// type-dependent. For example, this would occur in a template such 2044/// as: 2045/// 2046/// \code 2047/// template<typename T, typename A1> 2048/// inline T make_a(const A1& a1) { 2049/// return T(a1); 2050/// } 2051/// \endcode 2052/// 2053/// When the returned expression is instantiated, it may resolve to a 2054/// constructor call, conversion function call, or some kind of type 2055/// conversion. 2056class CXXUnresolvedConstructExpr : public Expr { 2057 /// \brief The type being constructed. 2058 TypeSourceInfo *Type; 2059 2060 /// \brief The location of the left parentheses ('('). 2061 SourceLocation LParenLoc; 2062 2063 /// \brief The location of the right parentheses (')'). 2064 SourceLocation RParenLoc; 2065 2066 /// \brief The number of arguments used to construct the type. 2067 unsigned NumArgs; 2068 2069 CXXUnresolvedConstructExpr(TypeSourceInfo *Type, 2070 SourceLocation LParenLoc, 2071 Expr **Args, 2072 unsigned NumArgs, 2073 SourceLocation RParenLoc); 2074 2075 CXXUnresolvedConstructExpr(EmptyShell Empty, unsigned NumArgs) 2076 : Expr(CXXUnresolvedConstructExprClass, Empty), Type(), NumArgs(NumArgs) { } 2077 2078 friend class ASTStmtReader; 2079 2080public: 2081 static CXXUnresolvedConstructExpr *Create(ASTContext &C, 2082 TypeSourceInfo *Type, 2083 SourceLocation LParenLoc, 2084 Expr **Args, 2085 unsigned NumArgs, 2086 SourceLocation RParenLoc); 2087 2088 static CXXUnresolvedConstructExpr *CreateEmpty(ASTContext &C, 2089 unsigned NumArgs); 2090 2091 /// \brief Retrieve the type that is being constructed, as specified 2092 /// in the source code. 2093 QualType getTypeAsWritten() const { return Type->getType(); } 2094 2095 /// \brief Retrieve the type source information for the type being 2096 /// constructed. 2097 TypeSourceInfo *getTypeSourceInfo() const { return Type; } 2098 2099 /// \brief Retrieve the location of the left parentheses ('(') that 2100 /// precedes the argument list. 2101 SourceLocation getLParenLoc() const { return LParenLoc; } 2102 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 2103 2104 /// \brief Retrieve the location of the right parentheses (')') that 2105 /// follows the argument list. 2106 SourceLocation getRParenLoc() const { return RParenLoc; } 2107 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2108 2109 /// \brief Retrieve the number of arguments. 2110 unsigned arg_size() const { return NumArgs; } 2111 2112 typedef Expr** arg_iterator; 2113 arg_iterator arg_begin() { return reinterpret_cast<Expr**>(this + 1); } 2114 arg_iterator arg_end() { return arg_begin() + NumArgs; } 2115 2116 typedef const Expr* const * const_arg_iterator; 2117 const_arg_iterator arg_begin() const { 2118 return reinterpret_cast<const Expr* const *>(this + 1); 2119 } 2120 const_arg_iterator arg_end() const { 2121 return arg_begin() + NumArgs; 2122 } 2123 2124 Expr *getArg(unsigned I) { 2125 assert(I < NumArgs && "Argument index out-of-range"); 2126 return *(arg_begin() + I); 2127 } 2128 2129 const Expr *getArg(unsigned I) const { 2130 assert(I < NumArgs && "Argument index out-of-range"); 2131 return *(arg_begin() + I); 2132 } 2133 2134 void setArg(unsigned I, Expr *E) { 2135 assert(I < NumArgs && "Argument index out-of-range"); 2136 *(arg_begin() + I) = E; 2137 } 2138 2139 virtual SourceRange getSourceRange() const; 2140 2141 static bool classof(const Stmt *T) { 2142 return T->getStmtClass() == CXXUnresolvedConstructExprClass; 2143 } 2144 static bool classof(const CXXUnresolvedConstructExpr *) { return true; } 2145 2146 // Iterators 2147 virtual child_iterator child_begin(); 2148 virtual child_iterator child_end(); 2149}; 2150 2151/// \brief Represents a C++ member access expression where the actual 2152/// member referenced could not be resolved because the base 2153/// expression or the member name was dependent. 2154/// 2155/// Like UnresolvedMemberExprs, these can be either implicit or 2156/// explicit accesses. It is only possible to get one of these with 2157/// an implicit access if a qualifier is provided. 2158class CXXDependentScopeMemberExpr : public Expr { 2159 /// \brief The expression for the base pointer or class reference, 2160 /// e.g., the \c x in x.f. Can be null in implicit accesses. 2161 Stmt *Base; 2162 2163 /// \brief The type of the base expression. Never null, even for 2164 /// implicit accesses. 2165 QualType BaseType; 2166 2167 /// \brief Whether this member expression used the '->' operator or 2168 /// the '.' operator. 2169 bool IsArrow : 1; 2170 2171 /// \brief Whether this member expression has explicitly-specified template 2172 /// arguments. 2173 bool HasExplicitTemplateArgs : 1; 2174 2175 /// \brief The location of the '->' or '.' operator. 2176 SourceLocation OperatorLoc; 2177 2178 /// \brief The nested-name-specifier that precedes the member name, if any. 2179 NestedNameSpecifier *Qualifier; 2180 2181 /// \brief The source range covering the nested name specifier. 2182 SourceRange QualifierRange; 2183 2184 /// \brief In a qualified member access expression such as t->Base::f, this 2185 /// member stores the resolves of name lookup in the context of the member 2186 /// access expression, to be used at instantiation time. 2187 /// 2188 /// FIXME: This member, along with the Qualifier and QualifierRange, could 2189 /// be stuck into a structure that is optionally allocated at the end of 2190 /// the CXXDependentScopeMemberExpr, to save space in the common case. 2191 NamedDecl *FirstQualifierFoundInScope; 2192 2193 /// \brief The member to which this member expression refers, which 2194 /// can be name, overloaded operator, or destructor. 2195 /// FIXME: could also be a template-id 2196 DeclarationNameInfo MemberNameInfo; 2197 2198 CXXDependentScopeMemberExpr(ASTContext &C, 2199 Expr *Base, QualType BaseType, bool IsArrow, 2200 SourceLocation OperatorLoc, 2201 NestedNameSpecifier *Qualifier, 2202 SourceRange QualifierRange, 2203 NamedDecl *FirstQualifierFoundInScope, 2204 DeclarationNameInfo MemberNameInfo, 2205 const TemplateArgumentListInfo *TemplateArgs); 2206 2207public: 2208 CXXDependentScopeMemberExpr(ASTContext &C, 2209 Expr *Base, QualType BaseType, 2210 bool IsArrow, 2211 SourceLocation OperatorLoc, 2212 NestedNameSpecifier *Qualifier, 2213 SourceRange QualifierRange, 2214 NamedDecl *FirstQualifierFoundInScope, 2215 DeclarationNameInfo MemberNameInfo); 2216 2217 static CXXDependentScopeMemberExpr * 2218 Create(ASTContext &C, 2219 Expr *Base, QualType BaseType, bool IsArrow, 2220 SourceLocation OperatorLoc, 2221 NestedNameSpecifier *Qualifier, 2222 SourceRange QualifierRange, 2223 NamedDecl *FirstQualifierFoundInScope, 2224 DeclarationNameInfo MemberNameInfo, 2225 const TemplateArgumentListInfo *TemplateArgs); 2226 2227 static CXXDependentScopeMemberExpr * 2228 CreateEmpty(ASTContext &C, bool HasExplicitTemplateArgs, 2229 unsigned NumTemplateArgs); 2230 2231 /// \brief True if this is an implicit access, i.e. one in which the 2232 /// member being accessed was not written in the source. The source 2233 /// location of the operator is invalid in this case. 2234 bool isImplicitAccess() const { return Base == 0; } 2235 2236 /// \brief Retrieve the base object of this member expressions, 2237 /// e.g., the \c x in \c x.m. 2238 Expr *getBase() const { 2239 assert(!isImplicitAccess()); 2240 return cast<Expr>(Base); 2241 } 2242 void setBase(Expr *E) { Base = E; } 2243 2244 QualType getBaseType() const { return BaseType; } 2245 void setBaseType(QualType T) { BaseType = T; } 2246 2247 /// \brief Determine whether this member expression used the '->' 2248 /// operator; otherwise, it used the '.' operator. 2249 bool isArrow() const { return IsArrow; } 2250 void setArrow(bool A) { IsArrow = A; } 2251 2252 /// \brief Retrieve the location of the '->' or '.' operator. 2253 SourceLocation getOperatorLoc() const { return OperatorLoc; } 2254 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 2255 2256 /// \brief Retrieve the nested-name-specifier that qualifies the member 2257 /// name. 2258 NestedNameSpecifier *getQualifier() const { return Qualifier; } 2259 void setQualifier(NestedNameSpecifier *NNS) { Qualifier = NNS; } 2260 2261 /// \brief Retrieve the source range covering the nested-name-specifier 2262 /// that qualifies the member name. 2263 SourceRange getQualifierRange() const { return QualifierRange; } 2264 void setQualifierRange(SourceRange R) { QualifierRange = R; } 2265 2266 /// \brief Retrieve the first part of the nested-name-specifier that was 2267 /// found in the scope of the member access expression when the member access 2268 /// was initially parsed. 2269 /// 2270 /// This function only returns a useful result when member access expression 2271 /// uses a qualified member name, e.g., "x.Base::f". Here, the declaration 2272 /// returned by this function describes what was found by unqualified name 2273 /// lookup for the identifier "Base" within the scope of the member access 2274 /// expression itself. At template instantiation time, this information is 2275 /// combined with the results of name lookup into the type of the object 2276 /// expression itself (the class type of x). 2277 NamedDecl *getFirstQualifierFoundInScope() const { 2278 return FirstQualifierFoundInScope; 2279 } 2280 void setFirstQualifierFoundInScope(NamedDecl *D) { 2281 FirstQualifierFoundInScope = D; 2282 } 2283 2284 /// \brief Retrieve the name of the member that this expression 2285 /// refers to. 2286 const DeclarationNameInfo &getMemberNameInfo() const { 2287 return MemberNameInfo; 2288 } 2289 void setMemberNameInfo(const DeclarationNameInfo &N) { MemberNameInfo = N; } 2290 2291 /// \brief Retrieve the name of the member that this expression 2292 /// refers to. 2293 DeclarationName getMember() const { return MemberNameInfo.getName(); } 2294 void setMember(DeclarationName N) { MemberNameInfo.setName(N); } 2295 2296 // \brief Retrieve the location of the name of the member that this 2297 // expression refers to. 2298 SourceLocation getMemberLoc() const { return MemberNameInfo.getLoc(); } 2299 void setMemberLoc(SourceLocation L) { MemberNameInfo.setLoc(L); } 2300 2301 /// \brief Determines whether this member expression actually had a C++ 2302 /// template argument list explicitly specified, e.g., x.f<int>. 2303 bool hasExplicitTemplateArgs() const { 2304 return HasExplicitTemplateArgs; 2305 } 2306 2307 /// \brief Retrieve the explicit template argument list that followed the 2308 /// member template name, if any. 2309 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 2310 assert(HasExplicitTemplateArgs); 2311 return *reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 2312 } 2313 2314 /// \brief Retrieve the explicit template argument list that followed the 2315 /// member template name, if any. 2316 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 2317 return const_cast<CXXDependentScopeMemberExpr *>(this) 2318 ->getExplicitTemplateArgs(); 2319 } 2320 2321 /// \brief Retrieves the optional explicit template arguments. 2322 /// This points to the same data as getExplicitTemplateArgs(), but 2323 /// returns null if there are no explicit template arguments. 2324 const ExplicitTemplateArgumentList *getOptionalExplicitTemplateArgs() { 2325 if (!hasExplicitTemplateArgs()) return 0; 2326 return &getExplicitTemplateArgs(); 2327 } 2328 2329 /// \brief Copies the template arguments (if present) into the given 2330 /// structure. 2331 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 2332 getExplicitTemplateArgs().copyInto(List); 2333 } 2334 2335 /// \brief Initializes the template arguments using the given structure. 2336 void initializeTemplateArgumentsFrom(const TemplateArgumentListInfo &List) { 2337 getExplicitTemplateArgs().initializeFrom(List); 2338 } 2339 2340 /// \brief Retrieve the location of the left angle bracket following the 2341 /// member name ('<'), if any. 2342 SourceLocation getLAngleLoc() const { 2343 return getExplicitTemplateArgs().LAngleLoc; 2344 } 2345 2346 /// \brief Retrieve the template arguments provided as part of this 2347 /// template-id. 2348 const TemplateArgumentLoc *getTemplateArgs() const { 2349 return getExplicitTemplateArgs().getTemplateArgs(); 2350 } 2351 2352 /// \brief Retrieve the number of template arguments provided as part of this 2353 /// template-id. 2354 unsigned getNumTemplateArgs() const { 2355 return getExplicitTemplateArgs().NumTemplateArgs; 2356 } 2357 2358 /// \brief Retrieve the location of the right angle bracket following the 2359 /// template arguments ('>'). 2360 SourceLocation getRAngleLoc() const { 2361 return getExplicitTemplateArgs().RAngleLoc; 2362 } 2363 2364 virtual SourceRange getSourceRange() const { 2365 SourceRange Range; 2366 if (!isImplicitAccess()) 2367 Range.setBegin(Base->getSourceRange().getBegin()); 2368 else if (getQualifier()) 2369 Range.setBegin(getQualifierRange().getBegin()); 2370 else 2371 Range.setBegin(MemberNameInfo.getBeginLoc()); 2372 2373 if (hasExplicitTemplateArgs()) 2374 Range.setEnd(getRAngleLoc()); 2375 else 2376 Range.setEnd(MemberNameInfo.getEndLoc()); 2377 return Range; 2378 } 2379 2380 static bool classof(const Stmt *T) { 2381 return T->getStmtClass() == CXXDependentScopeMemberExprClass; 2382 } 2383 static bool classof(const CXXDependentScopeMemberExpr *) { return true; } 2384 2385 // Iterators 2386 virtual child_iterator child_begin(); 2387 virtual child_iterator child_end(); 2388 2389 friend class ASTStmtReader; 2390 friend class ASTStmtWriter; 2391}; 2392 2393/// \brief Represents a C++ member access expression for which lookup 2394/// produced a set of overloaded functions. 2395/// 2396/// The member access may be explicit or implicit: 2397/// struct A { 2398/// int a, b; 2399/// int explicitAccess() { return this->a + this->A::b; } 2400/// int implicitAccess() { return a + A::b; } 2401/// }; 2402/// 2403/// In the final AST, an explicit access always becomes a MemberExpr. 2404/// An implicit access may become either a MemberExpr or a 2405/// DeclRefExpr, depending on whether the member is static. 2406class UnresolvedMemberExpr : public OverloadExpr { 2407 /// \brief Whether this member expression used the '->' operator or 2408 /// the '.' operator. 2409 bool IsArrow : 1; 2410 2411 /// \brief Whether the lookup results contain an unresolved using 2412 /// declaration. 2413 bool HasUnresolvedUsing : 1; 2414 2415 /// \brief The expression for the base pointer or class reference, 2416 /// e.g., the \c x in x.f. This can be null if this is an 'unbased' 2417 /// member expression 2418 Stmt *Base; 2419 2420 /// \brief The type of the base expression; never null. 2421 QualType BaseType; 2422 2423 /// \brief The location of the '->' or '.' operator. 2424 SourceLocation OperatorLoc; 2425 2426 UnresolvedMemberExpr(ASTContext &C, bool HasUnresolvedUsing, 2427 Expr *Base, QualType BaseType, bool IsArrow, 2428 SourceLocation OperatorLoc, 2429 NestedNameSpecifier *Qualifier, 2430 SourceRange QualifierRange, 2431 const DeclarationNameInfo &MemberNameInfo, 2432 const TemplateArgumentListInfo *TemplateArgs, 2433 UnresolvedSetIterator Begin, UnresolvedSetIterator End); 2434 2435 UnresolvedMemberExpr(EmptyShell Empty) 2436 : OverloadExpr(UnresolvedMemberExprClass, Empty), IsArrow(false), 2437 HasUnresolvedUsing(false), Base(0) { } 2438 2439public: 2440 static UnresolvedMemberExpr * 2441 Create(ASTContext &C, bool HasUnresolvedUsing, 2442 Expr *Base, QualType BaseType, bool IsArrow, 2443 SourceLocation OperatorLoc, 2444 NestedNameSpecifier *Qualifier, 2445 SourceRange QualifierRange, 2446 const DeclarationNameInfo &MemberNameInfo, 2447 const TemplateArgumentListInfo *TemplateArgs, 2448 UnresolvedSetIterator Begin, UnresolvedSetIterator End); 2449 2450 static UnresolvedMemberExpr * 2451 CreateEmpty(ASTContext &C, bool HasExplicitTemplateArgs, 2452 unsigned NumTemplateArgs); 2453 2454 /// \brief True if this is an implicit access, i.e. one in which the 2455 /// member being accessed was not written in the source. The source 2456 /// location of the operator is invalid in this case. 2457 bool isImplicitAccess() const { return Base == 0; } 2458 2459 /// \brief Retrieve the base object of this member expressions, 2460 /// e.g., the \c x in \c x.m. 2461 Expr *getBase() { 2462 assert(!isImplicitAccess()); 2463 return cast<Expr>(Base); 2464 } 2465 const Expr *getBase() const { 2466 assert(!isImplicitAccess()); 2467 return cast<Expr>(Base); 2468 } 2469 void setBase(Expr *E) { Base = E; } 2470 2471 QualType getBaseType() const { return BaseType; } 2472 void setBaseType(QualType T) { BaseType = T; } 2473 2474 /// \brief Determine whether the lookup results contain an unresolved using 2475 /// declaration. 2476 bool hasUnresolvedUsing() const { return HasUnresolvedUsing; } 2477 void setHasUnresolvedUsing(bool V) { HasUnresolvedUsing = V; } 2478 2479 /// \brief Determine whether this member expression used the '->' 2480 /// operator; otherwise, it used the '.' operator. 2481 bool isArrow() const { return IsArrow; } 2482 void setArrow(bool A) { IsArrow = A; } 2483 2484 /// \brief Retrieve the location of the '->' or '.' operator. 2485 SourceLocation getOperatorLoc() const { return OperatorLoc; } 2486 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 2487 2488 /// \brief Retrieves the naming class of this lookup. 2489 CXXRecordDecl *getNamingClass() const; 2490 2491 /// \brief Retrieve the full name info for the member that this expression 2492 /// refers to. 2493 const DeclarationNameInfo &getMemberNameInfo() const { return getNameInfo(); } 2494 void setMemberNameInfo(const DeclarationNameInfo &N) { setNameInfo(N); } 2495 2496 /// \brief Retrieve the name of the member that this expression 2497 /// refers to. 2498 DeclarationName getMemberName() const { return getName(); } 2499 void setMemberName(DeclarationName N) { setName(N); } 2500 2501 // \brief Retrieve the location of the name of the member that this 2502 // expression refers to. 2503 SourceLocation getMemberLoc() const { return getNameLoc(); } 2504 void setMemberLoc(SourceLocation L) { setNameLoc(L); } 2505 2506 /// \brief Retrieve the explicit template argument list that followed the 2507 /// member template name. 2508 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 2509 assert(hasExplicitTemplateArgs()); 2510 return *reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 2511 } 2512 2513 /// \brief Retrieve the explicit template argument list that followed the 2514 /// member template name, if any. 2515 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 2516 assert(hasExplicitTemplateArgs()); 2517 return *reinterpret_cast<const ExplicitTemplateArgumentList *>(this + 1); 2518 } 2519 2520 /// \brief Retrieves the optional explicit template arguments. 2521 /// This points to the same data as getExplicitTemplateArgs(), but 2522 /// returns null if there are no explicit template arguments. 2523 const ExplicitTemplateArgumentList *getOptionalExplicitTemplateArgs() { 2524 if (!hasExplicitTemplateArgs()) return 0; 2525 return &getExplicitTemplateArgs(); 2526 } 2527 2528 /// \brief Copies the template arguments into the given structure. 2529 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 2530 getExplicitTemplateArgs().copyInto(List); 2531 } 2532 2533 /// \brief Retrieve the location of the left angle bracket following 2534 /// the member name ('<'). 2535 SourceLocation getLAngleLoc() const { 2536 return getExplicitTemplateArgs().LAngleLoc; 2537 } 2538 2539 /// \brief Retrieve the template arguments provided as part of this 2540 /// template-id. 2541 const TemplateArgumentLoc *getTemplateArgs() const { 2542 return getExplicitTemplateArgs().getTemplateArgs(); 2543 } 2544 2545 /// \brief Retrieve the number of template arguments provided as 2546 /// part of this template-id. 2547 unsigned getNumTemplateArgs() const { 2548 return getExplicitTemplateArgs().NumTemplateArgs; 2549 } 2550 2551 /// \brief Retrieve the location of the right angle bracket 2552 /// following the template arguments ('>'). 2553 SourceLocation getRAngleLoc() const { 2554 return getExplicitTemplateArgs().RAngleLoc; 2555 } 2556 2557 virtual SourceRange getSourceRange() const { 2558 SourceRange Range = getMemberNameInfo().getSourceRange(); 2559 if (!isImplicitAccess()) 2560 Range.setBegin(Base->getSourceRange().getBegin()); 2561 else if (getQualifier()) 2562 Range.setBegin(getQualifierRange().getBegin()); 2563 2564 if (hasExplicitTemplateArgs()) 2565 Range.setEnd(getRAngleLoc()); 2566 return Range; 2567 } 2568 2569 static bool classof(const Stmt *T) { 2570 return T->getStmtClass() == UnresolvedMemberExprClass; 2571 } 2572 static bool classof(const UnresolvedMemberExpr *) { return true; } 2573 2574 // Iterators 2575 virtual child_iterator child_begin(); 2576 virtual child_iterator child_end(); 2577}; 2578 2579/// \brief Represents a C++0x noexcept expression (C++ [expr.unary.noexcept]). 2580/// 2581/// The noexcept expression tests whether a given expression might throw. Its 2582/// result is a boolean constant. 2583class CXXNoexceptExpr : public Expr { 2584 bool Value : 1; 2585 Stmt *Operand; 2586 SourceRange Range; 2587 2588 friend class ASTStmtReader; 2589 2590public: 2591 CXXNoexceptExpr(QualType Ty, Expr *Operand, CanThrowResult Val, 2592 SourceLocation Keyword, SourceLocation RParen) 2593 : Expr(CXXNoexceptExprClass, Ty, VK_RValue, OK_Ordinary, 2594 /*TypeDependent*/false, 2595 /*ValueDependent*/Val == CT_Dependent, 2596 Operand->containsUnexpandedParameterPack()), 2597 Value(Val == CT_Cannot), Operand(Operand), Range(Keyword, RParen) 2598 { } 2599 2600 CXXNoexceptExpr(EmptyShell Empty) 2601 : Expr(CXXNoexceptExprClass, Empty) 2602 { } 2603 2604 Expr *getOperand() const { return static_cast<Expr*>(Operand); } 2605 2606 virtual SourceRange getSourceRange() const { return Range; } 2607 2608 bool getValue() const { return Value; } 2609 2610 static bool classof(const Stmt *T) { 2611 return T->getStmtClass() == CXXNoexceptExprClass; 2612 } 2613 static bool classof(const CXXNoexceptExpr *) { return true; } 2614 2615 // Iterators 2616 virtual child_iterator child_begin(); 2617 virtual child_iterator child_end(); 2618}; 2619 2620/// \brief Represents a C++0x pack expansion that produces a sequence of 2621/// expressions. 2622/// 2623/// A pack expansion expression contains a pattern (which itself is an 2624/// expression) followed by an ellipsis. For example: 2625/// 2626/// \code 2627/// template<typename F, typename ...Types> 2628/// void forward(F f, Types &&...args) { 2629/// f(static_cast<Types&&>(args)...); 2630/// } 2631/// \endcode 2632/// 2633/// Here, the argument to the function object \c f is a pack expansion whose 2634/// pattern is \c static_cast<Types&&>(args). When the \c forward function 2635/// template is instantiated, the pack expansion will instantiate to zero or 2636/// or more function arguments to the function object \c f. 2637class PackExpansionExpr : public Expr { 2638 SourceLocation EllipsisLoc; 2639 2640 /// \brief The number of expansions that will be produced by this pack 2641 /// expansion expression, if known. 2642 /// 2643 /// When zero, the number of expansions is not known. Otherwise, this value 2644 /// is the number of expansions + 1. 2645 unsigned NumExpansions; 2646 2647 Stmt *Pattern; 2648 2649 friend class ASTStmtReader; 2650 friend class ASTStmtWriter; 2651 2652public: 2653 PackExpansionExpr(QualType T, Expr *Pattern, SourceLocation EllipsisLoc, 2654 llvm::Optional<unsigned> NumExpansions) 2655 : Expr(PackExpansionExprClass, T, Pattern->getValueKind(), 2656 Pattern->getObjectKind(), /*TypeDependent=*/true, 2657 /*ValueDependent=*/true, /*ContainsUnexpandedParameterPack=*/false), 2658 EllipsisLoc(EllipsisLoc), 2659 NumExpansions(NumExpansions? *NumExpansions + 1 : 0), 2660 Pattern(Pattern) { } 2661 2662 PackExpansionExpr(EmptyShell Empty) : Expr(PackExpansionExprClass, Empty) { } 2663 2664 /// \brief Retrieve the pattern of the pack expansion. 2665 Expr *getPattern() { return reinterpret_cast<Expr *>(Pattern); } 2666 2667 /// \brief Retrieve the pattern of the pack expansion. 2668 const Expr *getPattern() const { return reinterpret_cast<Expr *>(Pattern); } 2669 2670 /// \brief Retrieve the location of the ellipsis that describes this pack 2671 /// expansion. 2672 SourceLocation getEllipsisLoc() const { return EllipsisLoc; } 2673 2674 /// \brief Determine the number of expansions that will be produced when 2675 /// this pack expansion is instantiated, if already known. 2676 llvm::Optional<unsigned> getNumExpansions() const { 2677 if (NumExpansions) 2678 return NumExpansions - 1; 2679 2680 return llvm::Optional<unsigned>(); 2681 } 2682 2683 virtual SourceRange getSourceRange() const; 2684 2685 static bool classof(const Stmt *T) { 2686 return T->getStmtClass() == PackExpansionExprClass; 2687 } 2688 static bool classof(const PackExpansionExpr *) { return true; } 2689 2690 // Iterators 2691 virtual child_iterator child_begin(); 2692 virtual child_iterator child_end(); 2693}; 2694 2695inline ExplicitTemplateArgumentList &OverloadExpr::getExplicitTemplateArgs() { 2696 if (isa<UnresolvedLookupExpr>(this)) 2697 return cast<UnresolvedLookupExpr>(this)->getExplicitTemplateArgs(); 2698 else 2699 return cast<UnresolvedMemberExpr>(this)->getExplicitTemplateArgs(); 2700} 2701 2702/// \brief Represents an expression that computes the length of a parameter 2703/// pack. 2704/// 2705/// \code 2706/// template<typename ...Types> 2707/// struct count { 2708/// static const unsigned value = sizeof...(Types); 2709/// }; 2710/// \endcode 2711class SizeOfPackExpr : public Expr { 2712 /// \brief The location of the 'sizeof' keyword. 2713 SourceLocation OperatorLoc; 2714 2715 /// \brief The location of the name of the parameter pack. 2716 SourceLocation PackLoc; 2717 2718 /// \brief The location of the closing parenthesis. 2719 SourceLocation RParenLoc; 2720 2721 /// \brief The length of the parameter pack, if known. 2722 /// 2723 /// When this expression is value-dependent, the length of the parameter pack 2724 /// is unknown. When this expression is not value-dependent, the length is 2725 /// known. 2726 unsigned Length; 2727 2728 /// \brief The parameter pack itself. 2729 NamedDecl *Pack; 2730 2731 friend class ASTStmtReader; 2732 friend class ASTStmtWriter; 2733 2734public: 2735 /// \brief Creates a value-dependent expression that computes the length of 2736 /// the given parameter pack. 2737 SizeOfPackExpr(QualType SizeType, SourceLocation OperatorLoc, NamedDecl *Pack, 2738 SourceLocation PackLoc, SourceLocation RParenLoc) 2739 : Expr(SizeOfPackExprClass, SizeType, VK_RValue, OK_Ordinary, 2740 /*TypeDependent=*/false, /*ValueDependent=*/true, 2741 /*ContainsUnexpandedParameterPack=*/false), 2742 OperatorLoc(OperatorLoc), PackLoc(PackLoc), RParenLoc(RParenLoc), 2743 Length(0), Pack(Pack) { } 2744 2745 /// \brief Creates an expression that computes the length of 2746 /// the given parameter pack, which is already known. 2747 SizeOfPackExpr(QualType SizeType, SourceLocation OperatorLoc, NamedDecl *Pack, 2748 SourceLocation PackLoc, SourceLocation RParenLoc, 2749 unsigned Length) 2750 : Expr(SizeOfPackExprClass, SizeType, VK_RValue, OK_Ordinary, 2751 /*TypeDependent=*/false, /*ValueDependent=*/false, 2752 /*ContainsUnexpandedParameterPack=*/false), 2753 OperatorLoc(OperatorLoc), PackLoc(PackLoc), RParenLoc(RParenLoc), 2754 Length(Length), Pack(Pack) { } 2755 2756 /// \brief Create an empty expression. 2757 SizeOfPackExpr(EmptyShell Empty) : Expr(SizeOfPackExprClass, Empty) { } 2758 2759 /// \brief Determine the location of the 'sizeof' keyword. 2760 SourceLocation getOperatorLoc() const { return OperatorLoc; } 2761 2762 /// \brief Determine the location of the parameter pack. 2763 SourceLocation getPackLoc() const { return PackLoc; } 2764 2765 /// \brief Determine the location of the right parenthesis. 2766 SourceLocation getRParenLoc() const { return RParenLoc; } 2767 2768 /// \brief Retrieve the parameter pack. 2769 NamedDecl *getPack() const { return Pack; } 2770 2771 /// \brief Retrieve the length of the parameter pack. 2772 /// 2773 /// This routine may only be invoked when the expression is not 2774 /// value-dependent. 2775 unsigned getPackLength() const { 2776 assert(!isValueDependent() && 2777 "Cannot get the length of a value-dependent pack size expression"); 2778 return Length; 2779 } 2780 2781 virtual SourceRange getSourceRange() const; 2782 2783 static bool classof(const Stmt *T) { 2784 return T->getStmtClass() == SizeOfPackExprClass; 2785 } 2786 static bool classof(const SizeOfPackExpr *) { return true; } 2787 2788 // Iterators 2789 virtual child_iterator child_begin(); 2790 virtual child_iterator child_end(); 2791}; 2792 2793/// \brief Represents a reference to a non-type template parameter pack that 2794/// has been substituted with a non-template argument pack. 2795/// 2796/// When a pack expansion in the source code contains multiple parameter packs 2797/// and those parameter packs correspond to different levels of template 2798/// parameter lists, this node node is used to represent a non-type template 2799/// parameter pack from an outer level, which has already had its argument pack 2800/// substituted but that still lives within a pack expansion that itself 2801/// could not be instantiated. When actually performing a substitution into 2802/// that pack expansion (e.g., when all template parameters have corresponding 2803/// arguments), this type will be replaced with the appropriate underlying 2804/// expression at the current pack substitution index. 2805class SubstNonTypeTemplateParmPackExpr : public Expr { 2806 /// \brief The non-type template parameter pack itself. 2807 NonTypeTemplateParmDecl *Param; 2808 2809 /// \brief A pointer to the set of template arguments that this 2810 /// parameter pack is instantiated with. 2811 const TemplateArgument *Arguments; 2812 2813 /// \brief The number of template arguments in \c Arguments. 2814 unsigned NumArguments; 2815 2816 /// \brief The location of the non-type template parameter pack reference. 2817 SourceLocation NameLoc; 2818 2819 friend class ASTStmtReader; 2820 friend class ASTStmtWriter; 2821 2822public: 2823 SubstNonTypeTemplateParmPackExpr(QualType T, 2824 NonTypeTemplateParmDecl *Param, 2825 SourceLocation NameLoc, 2826 const TemplateArgument &ArgPack); 2827 2828 SubstNonTypeTemplateParmPackExpr(EmptyShell Empty) 2829 : Expr(SubstNonTypeTemplateParmPackExprClass, Empty) { } 2830 2831 /// \brief Retrieve the non-type template parameter pack being substituted. 2832 NonTypeTemplateParmDecl *getParameterPack() const { return Param; } 2833 2834 /// \brief Retrieve the location of the parameter pack name. 2835 SourceLocation getParameterPackLocation() const { return NameLoc; } 2836 2837 /// \brief Retrieve the template argument pack containing the substituted 2838 /// template arguments. 2839 TemplateArgument getArgumentPack() const; 2840 2841 virtual SourceRange getSourceRange() const; 2842 2843 static bool classof(const Stmt *T) { 2844 return T->getStmtClass() == SubstNonTypeTemplateParmPackExprClass; 2845 } 2846 static bool classof(const SubstNonTypeTemplateParmPackExpr *) { 2847 return true; 2848 } 2849 2850 // Iterators 2851 virtual child_iterator child_begin(); 2852 virtual child_iterator child_end(); 2853}; 2854 2855} // end namespace clang 2856 2857#endif 2858