ExprCXX.h revision 02bbfa33590dfe3107e801fb526b7ab0bdfd00ee
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/Decl.h" 20 21namespace clang { 22 23 class CXXConstructorDecl; 24 class CXXTempVarDecl; 25 26//===--------------------------------------------------------------------===// 27// C++ Expressions. 28//===--------------------------------------------------------------------===// 29 30/// \brief A call to an overloaded operator written using operator 31/// syntax. 32/// 33/// Represents a call to an overloaded operator written using operator 34/// syntax, e.g., "x + y" or "*p". While semantically equivalent to a 35/// normal call, this AST node provides better information about the 36/// syntactic representation of the call. 37/// 38/// In a C++ template, this expression node kind will be used whenever 39/// any of the arguments are type-dependent. In this case, the 40/// function itself will be a (possibly empty) set of functions and 41/// function templates that were found by name lookup at template 42/// definition time. 43class CXXOperatorCallExpr : public CallExpr { 44 /// \brief The overloaded operator. 45 OverloadedOperatorKind Operator; 46 47public: 48 CXXOperatorCallExpr(ASTContext& C, OverloadedOperatorKind Op, Expr *fn, 49 Expr **args, unsigned numargs, QualType t, 50 SourceLocation operatorloc) 51 : CallExpr(C, CXXOperatorCallExprClass, fn, args, numargs, t, operatorloc), 52 Operator(Op) {} 53 54 /// getOperator - Returns the kind of overloaded operator that this 55 /// expression refers to. 56 OverloadedOperatorKind getOperator() const { return Operator; } 57 58 /// getOperatorLoc - Returns the location of the operator symbol in 59 /// the expression. When @c getOperator()==OO_Call, this is the 60 /// location of the right parentheses; when @c 61 /// getOperator()==OO_Subscript, this is the location of the right 62 /// bracket. 63 SourceLocation getOperatorLoc() const { return getRParenLoc(); } 64 65 virtual SourceRange getSourceRange() const; 66 67 static bool classof(const Stmt *T) { 68 return T->getStmtClass() == CXXOperatorCallExprClass; 69 } 70 static bool classof(const CXXOperatorCallExpr *) { return true; } 71}; 72 73/// CXXMemberCallExpr - Represents a call to a member function that 74/// may be written either with member call syntax (e.g., "obj.func()" 75/// or "objptr->func()") or with normal function-call syntax 76/// ("func()") within a member function that ends up calling a member 77/// function. The callee in either case is a MemberExpr that contains 78/// both the object argument and the member function, while the 79/// arguments are the arguments within the parentheses (not including 80/// the object argument). 81class CXXMemberCallExpr : public CallExpr { 82public: 83 CXXMemberCallExpr(ASTContext& C, Expr *fn, Expr **args, unsigned numargs, 84 QualType t, SourceLocation rparenloc) 85 : CallExpr(C, CXXMemberCallExprClass, fn, args, numargs, t, rparenloc) {} 86 87 /// getImplicitObjectArgument - Retrieves the implicit object 88 /// argument for the member call. For example, in "x.f(5)", this 89 /// operation would return "x". 90 Expr *getImplicitObjectArgument(); 91 92 static bool classof(const Stmt *T) { 93 return T->getStmtClass() == CXXMemberCallExprClass; 94 } 95 static bool classof(const CXXMemberCallExpr *) { return true; } 96}; 97 98/// CXXNamedCastExpr - Abstract class common to all of the C++ "named" 99/// casts, @c static_cast, @c dynamic_cast, @c reinterpret_cast, or @c 100/// const_cast. 101/// 102/// This abstract class is inherited by all of the classes 103/// representing "named" casts, e.g., CXXStaticCastExpr, 104/// CXXDynamicCastExpr, CXXReinterpretCastExpr, and CXXConstCastExpr. 105class CXXNamedCastExpr : public ExplicitCastExpr { 106private: 107 SourceLocation Loc; // the location of the casting op 108 109protected: 110 CXXNamedCastExpr(StmtClass SC, QualType ty, Expr *op, QualType writtenTy, 111 SourceLocation l) 112 : ExplicitCastExpr(SC, ty, op, writtenTy), Loc(l) {} 113 114public: 115 const char *getCastName() const; 116 117 virtual SourceRange getSourceRange() const { 118 return SourceRange(Loc, getSubExpr()->getSourceRange().getEnd()); 119 } 120 static bool classof(const Stmt *T) { 121 switch (T->getStmtClass()) { 122 case CXXNamedCastExprClass: 123 case CXXStaticCastExprClass: 124 case CXXDynamicCastExprClass: 125 case CXXReinterpretCastExprClass: 126 case CXXConstCastExprClass: 127 return true; 128 default: 129 return false; 130 } 131 } 132 static bool classof(const CXXNamedCastExpr *) { return true; } 133}; 134 135/// CXXStaticCastExpr - A C++ @c static_cast expression (C++ [expr.static.cast]). 136/// 137/// This expression node represents a C++ static cast, e.g., 138/// @c static_cast<int>(1.0). 139class CXXStaticCastExpr : public CXXNamedCastExpr { 140public: 141 CXXStaticCastExpr(QualType ty, Expr *op, QualType writtenTy, SourceLocation l) 142 : CXXNamedCastExpr(CXXStaticCastExprClass, ty, op, writtenTy, l) {} 143 144 static bool classof(const Stmt *T) { 145 return T->getStmtClass() == CXXStaticCastExprClass; 146 } 147 static bool classof(const CXXStaticCastExpr *) { return true; } 148}; 149 150/// CXXDynamicCastExpr - A C++ @c dynamic_cast expression 151/// (C++ [expr.dynamic.cast]), which may perform a run-time check to 152/// determine how to perform the type cast. 153/// 154/// This expression node represents a dynamic cast, e.g., 155/// @c dynamic_cast<Derived*>(BasePtr). 156class CXXDynamicCastExpr : public CXXNamedCastExpr { 157public: 158 CXXDynamicCastExpr(QualType ty, Expr *op, QualType writtenTy, SourceLocation l) 159 : CXXNamedCastExpr(CXXDynamicCastExprClass, ty, op, writtenTy, l) {} 160 161 static bool classof(const Stmt *T) { 162 return T->getStmtClass() == CXXDynamicCastExprClass; 163 } 164 static bool classof(const CXXDynamicCastExpr *) { return true; } 165}; 166 167/// CXXReinterpretCastExpr - A C++ @c reinterpret_cast expression (C++ 168/// [expr.reinterpret.cast]), which provides a differently-typed view 169/// of a value but performs no actual work at run time. 170/// 171/// This expression node represents a reinterpret cast, e.g., 172/// @c reinterpret_cast<int>(VoidPtr). 173class CXXReinterpretCastExpr : public CXXNamedCastExpr { 174public: 175 CXXReinterpretCastExpr(QualType ty, Expr *op, QualType writtenTy, 176 SourceLocation l) 177 : CXXNamedCastExpr(CXXReinterpretCastExprClass, ty, op, writtenTy, l) {} 178 179 static bool classof(const Stmt *T) { 180 return T->getStmtClass() == CXXReinterpretCastExprClass; 181 } 182 static bool classof(const CXXReinterpretCastExpr *) { return true; } 183}; 184 185/// CXXConstCastExpr - A C++ @c const_cast expression (C++ [expr.const.cast]), 186/// which can remove type qualifiers but does not change the underlying value. 187/// 188/// This expression node represents a const cast, e.g., 189/// @c const_cast<char*>(PtrToConstChar). 190class CXXConstCastExpr : public CXXNamedCastExpr { 191public: 192 CXXConstCastExpr(QualType ty, Expr *op, QualType writtenTy, 193 SourceLocation l) 194 : CXXNamedCastExpr(CXXConstCastExprClass, ty, op, writtenTy, l) {} 195 196 static bool classof(const Stmt *T) { 197 return T->getStmtClass() == CXXConstCastExprClass; 198 } 199 static bool classof(const CXXConstCastExpr *) { return true; } 200}; 201 202/// CXXBoolLiteralExpr - [C++ 2.13.5] C++ Boolean Literal. 203/// 204class CXXBoolLiteralExpr : public Expr { 205 bool Value; 206 SourceLocation Loc; 207public: 208 CXXBoolLiteralExpr(bool val, QualType Ty, SourceLocation l) : 209 Expr(CXXBoolLiteralExprClass, Ty), Value(val), Loc(l) {} 210 211 bool getValue() const { return Value; } 212 213 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 214 215 static bool classof(const Stmt *T) { 216 return T->getStmtClass() == CXXBoolLiteralExprClass; 217 } 218 static bool classof(const CXXBoolLiteralExpr *) { return true; } 219 220 // Iterators 221 virtual child_iterator child_begin(); 222 virtual child_iterator child_end(); 223}; 224 225/// CXXTypeidExpr - A C++ @c typeid expression (C++ [expr.typeid]), which gets 226/// the type_info that corresponds to the supplied type, or the (possibly 227/// dynamic) type of the supplied expression. 228/// 229/// This represents code like @c typeid(int) or @c typeid(*objPtr) 230class CXXTypeidExpr : public Expr { 231private: 232 bool isTypeOp : 1; 233 union { 234 void *Ty; 235 Stmt *Ex; 236 } Operand; 237 SourceRange Range; 238 239public: 240 CXXTypeidExpr(bool isTypeOp, void *op, QualType Ty, const SourceRange r) : 241 Expr(CXXTypeidExprClass, Ty, 242 // typeid is never type-dependent (C++ [temp.dep.expr]p4) 243 false, 244 // typeid is value-dependent if the type or expression are dependent 245 (isTypeOp ? QualType::getFromOpaquePtr(op)->isDependentType() 246 : static_cast<Expr*>(op)->isValueDependent())), 247 isTypeOp(isTypeOp), Range(r) { 248 if (isTypeOp) 249 Operand.Ty = op; 250 else 251 // op was an Expr*, so cast it back to that to be safe 252 Operand.Ex = static_cast<Expr*>(op); 253 } 254 255 bool isTypeOperand() const { return isTypeOp; } 256 QualType getTypeOperand() const { 257 assert(isTypeOperand() && "Cannot call getTypeOperand for typeid(expr)"); 258 return QualType::getFromOpaquePtr(Operand.Ty); 259 } 260 Expr* getExprOperand() const { 261 assert(!isTypeOperand() && "Cannot call getExprOperand for typeid(type)"); 262 return static_cast<Expr*>(Operand.Ex); 263 } 264 265 virtual SourceRange getSourceRange() const { 266 return Range; 267 } 268 static bool classof(const Stmt *T) { 269 return T->getStmtClass() == CXXTypeidExprClass; 270 } 271 static bool classof(const CXXTypeidExpr *) { return true; } 272 273 // Iterators 274 virtual child_iterator child_begin(); 275 virtual child_iterator child_end(); 276}; 277 278/// CXXThisExpr - Represents the "this" expression in C++, which is a 279/// pointer to the object on which the current member function is 280/// executing (C++ [expr.prim]p3). Example: 281/// 282/// @code 283/// class Foo { 284/// public: 285/// void bar(); 286/// void test() { this->bar(); } 287/// }; 288/// @endcode 289class CXXThisExpr : public Expr { 290 SourceLocation Loc; 291 292public: 293 CXXThisExpr(SourceLocation L, QualType Type) 294 : Expr(CXXThisExprClass, Type, 295 // 'this' is type-dependent if the class type of the enclosing 296 // member function is dependent (C++ [temp.dep.expr]p2) 297 Type->isDependentType(), Type->isDependentType()), 298 Loc(L) { } 299 300 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 301 302 static bool classof(const Stmt *T) { 303 return T->getStmtClass() == CXXThisExprClass; 304 } 305 static bool classof(const CXXThisExpr *) { return true; } 306 307 // Iterators 308 virtual child_iterator child_begin(); 309 virtual child_iterator child_end(); 310}; 311 312/// CXXThrowExpr - [C++ 15] C++ Throw Expression. This handles 313/// 'throw' and 'throw' assignment-expression. When 314/// assignment-expression isn't present, Op will be null. 315/// 316class CXXThrowExpr : public Expr { 317 Stmt *Op; 318 SourceLocation ThrowLoc; 319public: 320 // Ty is the void type which is used as the result type of the 321 // exepression. The l is the location of the throw keyword. expr 322 // can by null, if the optional expression to throw isn't present. 323 CXXThrowExpr(Expr *expr, QualType Ty, SourceLocation l) : 324 Expr(CXXThrowExprClass, Ty, false, false), Op(expr), ThrowLoc(l) {} 325 const Expr *getSubExpr() const { return cast_or_null<Expr>(Op); } 326 Expr *getSubExpr() { return cast_or_null<Expr>(Op); } 327 328 virtual SourceRange getSourceRange() const { 329 if (getSubExpr() == 0) 330 return SourceRange(ThrowLoc, ThrowLoc); 331 return SourceRange(ThrowLoc, getSubExpr()->getSourceRange().getEnd()); 332 } 333 334 static bool classof(const Stmt *T) { 335 return T->getStmtClass() == CXXThrowExprClass; 336 } 337 static bool classof(const CXXThrowExpr *) { return true; } 338 339 // Iterators 340 virtual child_iterator child_begin(); 341 virtual child_iterator child_end(); 342}; 343 344/// CXXDefaultArgExpr - C++ [dcl.fct.default]. This wraps up a 345/// function call argument that was created from the corresponding 346/// parameter's default argument, when the call did not explicitly 347/// supply arguments for all of the parameters. 348class CXXDefaultArgExpr : public Expr { 349 ParmVarDecl *Param; 350public: 351 // Param is the parameter whose default argument is used by this 352 // expression. 353 explicit CXXDefaultArgExpr(ParmVarDecl *param) 354 : Expr(CXXDefaultArgExprClass, 355 param->hasUnparsedDefaultArg()? param->getType().getNonReferenceType() 356 : param->getDefaultArg()->getType()), 357 Param(param) { } 358 359 // Retrieve the parameter that the argument was created from. 360 const ParmVarDecl *getParam() const { return Param; } 361 ParmVarDecl *getParam() { return Param; } 362 363 // Retrieve the actual argument to the function call. 364 const Expr *getExpr() const { return Param->getDefaultArg(); } 365 Expr *getExpr() { return Param->getDefaultArg(); } 366 367 virtual SourceRange getSourceRange() const { 368 // Default argument expressions have no representation in the 369 // source, so they have an empty source range. 370 return SourceRange(); 371 } 372 373 static bool classof(const Stmt *T) { 374 return T->getStmtClass() == CXXDefaultArgExprClass; 375 } 376 static bool classof(const CXXDefaultArgExpr *) { return true; } 377 378 // Iterators 379 virtual child_iterator child_begin(); 380 virtual child_iterator child_end(); 381}; 382 383/// CXXConstructExpr - Represents a call to a C++ constructor. 384class CXXConstructExpr : public Expr { 385 VarDecl *VD; 386 CXXConstructorDecl *Constructor; 387 388 bool Elidable; 389 390 Stmt **Args; 391 unsigned NumArgs; 392 393 394protected: 395 CXXConstructExpr(ASTContext &C, StmtClass SC, VarDecl *vd, QualType T, 396 CXXConstructorDecl *d, bool elidable, 397 Expr **args, unsigned numargs); 398 ~CXXConstructExpr() { } 399 400public: 401 static CXXConstructExpr *Create(ASTContext &C, VarDecl *VD, QualType T, 402 CXXConstructorDecl *D, bool Elidable, 403 Expr **Args, unsigned NumArgs); 404 405 void Destroy(ASTContext &C); 406 407 const VarDecl* getVarDecl() const { return VD; } 408 const CXXConstructorDecl* getConstructor() const { return Constructor; } 409 410 typedef ExprIterator arg_iterator; 411 typedef ConstExprIterator const_arg_iterator; 412 413 arg_iterator arg_begin() { return Args; } 414 arg_iterator arg_end() { return Args + NumArgs; } 415 const_arg_iterator arg_begin() const { return Args; } 416 const_arg_iterator arg_end() const { return Args + NumArgs; } 417 418 unsigned getNumArgs() const { return NumArgs; } 419 420 virtual SourceRange getSourceRange() const { return SourceRange(); } 421 422 static bool classof(const Stmt *T) { 423 return T->getStmtClass() == CXXConstructExprClass || 424 T->getStmtClass() == CXXTemporaryObjectExprClass; 425 } 426 static bool classof(const CXXConstructExpr *) { return true; } 427 428 // Iterators 429 virtual child_iterator child_begin(); 430 virtual child_iterator child_end(); 431}; 432 433/// CXXFunctionalCastExpr - Represents an explicit C++ type conversion 434/// that uses "functional" notion (C++ [expr.type.conv]). Example: @c 435/// x = int(0.5); 436class CXXFunctionalCastExpr : public ExplicitCastExpr { 437 SourceLocation TyBeginLoc; 438 SourceLocation RParenLoc; 439public: 440 CXXFunctionalCastExpr(QualType ty, QualType writtenTy, 441 SourceLocation tyBeginLoc, Expr *castExpr, 442 SourceLocation rParenLoc) : 443 ExplicitCastExpr(CXXFunctionalCastExprClass, ty, castExpr, writtenTy), 444 TyBeginLoc(tyBeginLoc), RParenLoc(rParenLoc) {} 445 446 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 447 SourceLocation getRParenLoc() const { return RParenLoc; } 448 449 virtual SourceRange getSourceRange() const { 450 return SourceRange(TyBeginLoc, RParenLoc); 451 } 452 static bool classof(const Stmt *T) { 453 return T->getStmtClass() == CXXFunctionalCastExprClass; 454 } 455 static bool classof(const CXXFunctionalCastExpr *) { return true; } 456}; 457 458/// @brief Represents a C++ functional cast expression that builds a 459/// temporary object. 460/// 461/// This expression type represents a C++ "functional" cast 462/// (C++[expr.type.conv]) with N != 1 arguments that invokes a 463/// constructor to build a temporary object. If N == 0 but no 464/// constructor will be called (because the functional cast is 465/// performing a value-initialized an object whose class type has no 466/// user-declared constructors), CXXZeroInitValueExpr will represent 467/// the functional cast. Finally, with N == 1 arguments the functional 468/// cast expression will be represented by CXXFunctionalCastExpr. 469/// Example: 470/// @code 471/// struct X { X(int, float); } 472/// 473/// X create_X() { 474/// return X(1, 3.14f); // creates a CXXTemporaryObjectExpr 475/// }; 476/// @endcode 477class CXXTemporaryObjectExpr : public CXXConstructExpr { 478 SourceLocation TyBeginLoc; 479 SourceLocation RParenLoc; 480 481public: 482 CXXTemporaryObjectExpr(ASTContext &C, VarDecl *vd, 483 CXXConstructorDecl *Cons, QualType writtenTy, 484 SourceLocation tyBeginLoc, Expr **Args, 485 unsigned NumArgs, SourceLocation rParenLoc); 486 487 ~CXXTemporaryObjectExpr() { } 488 489 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 490 SourceLocation getRParenLoc() const { return RParenLoc; } 491 492 virtual SourceRange getSourceRange() const { 493 return SourceRange(TyBeginLoc, RParenLoc); 494 } 495 static bool classof(const Stmt *T) { 496 return T->getStmtClass() == CXXTemporaryObjectExprClass; 497 } 498 static bool classof(const CXXTemporaryObjectExpr *) { return true; } 499}; 500 501/// CXXZeroInitValueExpr - [C++ 5.2.3p2] 502/// Expression "T()" which creates a value-initialized rvalue of type 503/// T, which is either a non-class type or a class type without any 504/// user-defined constructors. 505/// 506class CXXZeroInitValueExpr : public Expr { 507 SourceLocation TyBeginLoc; 508 SourceLocation RParenLoc; 509 510public: 511 CXXZeroInitValueExpr(QualType ty, SourceLocation tyBeginLoc, 512 SourceLocation rParenLoc ) : 513 Expr(CXXZeroInitValueExprClass, ty), 514 TyBeginLoc(tyBeginLoc), RParenLoc(rParenLoc) {} 515 516 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 517 SourceLocation getRParenLoc() const { return RParenLoc; } 518 519 /// @brief Whether this initialization expression was 520 /// implicitly-generated. 521 bool isImplicit() const { 522 return TyBeginLoc.isInvalid() && RParenLoc.isInvalid(); 523 } 524 525 virtual SourceRange getSourceRange() const { 526 return SourceRange(TyBeginLoc, RParenLoc); 527 } 528 529 static bool classof(const Stmt *T) { 530 return T->getStmtClass() == CXXZeroInitValueExprClass; 531 } 532 static bool classof(const CXXZeroInitValueExpr *) { return true; } 533 534 // Iterators 535 virtual child_iterator child_begin(); 536 virtual child_iterator child_end(); 537}; 538 539/// CXXConditionDeclExpr - Condition declaration of a if/switch/while/for 540/// statement, e.g: "if (int x = f()) {...}". 541/// The main difference with DeclRefExpr is that CXXConditionDeclExpr owns the 542/// decl that it references. 543/// 544class CXXConditionDeclExpr : public DeclRefExpr { 545public: 546 CXXConditionDeclExpr(SourceLocation startLoc, 547 SourceLocation eqLoc, VarDecl *var) 548 : DeclRefExpr(CXXConditionDeclExprClass, var, 549 var->getType().getNonReferenceType(), startLoc) {} 550 551 virtual void Destroy(ASTContext& Ctx); 552 553 SourceLocation getStartLoc() const { return getLocation(); } 554 555 VarDecl *getVarDecl() { return cast<VarDecl>(getDecl()); } 556 const VarDecl *getVarDecl() const { return cast<VarDecl>(getDecl()); } 557 558 virtual SourceRange getSourceRange() const { 559 return SourceRange(getStartLoc(), getVarDecl()->getInit()->getLocEnd()); 560 } 561 562 static bool classof(const Stmt *T) { 563 return T->getStmtClass() == CXXConditionDeclExprClass; 564 } 565 static bool classof(const CXXConditionDeclExpr *) { return true; } 566 567 // Iterators 568 virtual child_iterator child_begin(); 569 virtual child_iterator child_end(); 570}; 571 572/// CXXNewExpr - A new expression for memory allocation and constructor calls, 573/// e.g: "new CXXNewExpr(foo)". 574class CXXNewExpr : public Expr { 575 // Was the usage ::new, i.e. is the global new to be used? 576 bool GlobalNew : 1; 577 // Was the form (type-id) used? Otherwise, it was new-type-id. 578 bool ParenTypeId : 1; 579 // Is there an initializer? If not, built-ins are uninitialized, else they're 580 // value-initialized. 581 bool Initializer : 1; 582 // Do we allocate an array? If so, the first SubExpr is the size expression. 583 bool Array : 1; 584 // The number of placement new arguments. 585 unsigned NumPlacementArgs : 14; 586 // The number of constructor arguments. This may be 1 even for non-class 587 // types; use the pseudo copy constructor. 588 unsigned NumConstructorArgs : 14; 589 // Contains an optional array size expression, any number of optional 590 // placement arguments, and any number of optional constructor arguments, 591 // in that order. 592 Stmt **SubExprs; 593 // Points to the allocation function used. 594 FunctionDecl *OperatorNew; 595 // Points to the deallocation function used in case of error. May be null. 596 FunctionDecl *OperatorDelete; 597 // Points to the constructor used. Cannot be null if AllocType is a record; 598 // it would still point at the default constructor (even an implicit one). 599 // Must be null for all other types. 600 CXXConstructorDecl *Constructor; 601 602 SourceLocation StartLoc; 603 SourceLocation EndLoc; 604 605public: 606 CXXNewExpr(bool globalNew, FunctionDecl *operatorNew, Expr **placementArgs, 607 unsigned numPlaceArgs, bool ParenTypeId, Expr *arraySize, 608 CXXConstructorDecl *constructor, bool initializer, 609 Expr **constructorArgs, unsigned numConsArgs, 610 FunctionDecl *operatorDelete, QualType ty, 611 SourceLocation startLoc, SourceLocation endLoc); 612 ~CXXNewExpr() { 613 delete[] SubExprs; 614 } 615 616 QualType getAllocatedType() const { 617 assert(getType()->isPointerType()); 618 return getType()->getAsPointerType()->getPointeeType(); 619 } 620 621 FunctionDecl *getOperatorNew() const { return OperatorNew; } 622 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 623 CXXConstructorDecl *getConstructor() const { return Constructor; } 624 625 bool isArray() const { return Array; } 626 Expr *getArraySize() { 627 return Array ? cast<Expr>(SubExprs[0]) : 0; 628 } 629 const Expr *getArraySize() const { 630 return Array ? cast<Expr>(SubExprs[0]) : 0; 631 } 632 633 unsigned getNumPlacementArgs() const { return NumPlacementArgs; } 634 Expr *getPlacementArg(unsigned i) { 635 assert(i < NumPlacementArgs && "Index out of range"); 636 return cast<Expr>(SubExprs[Array + i]); 637 } 638 const Expr *getPlacementArg(unsigned i) const { 639 assert(i < NumPlacementArgs && "Index out of range"); 640 return cast<Expr>(SubExprs[Array + i]); 641 } 642 643 bool isGlobalNew() const { return GlobalNew; } 644 bool isParenTypeId() const { return ParenTypeId; } 645 bool hasInitializer() const { return Initializer; } 646 647 unsigned getNumConstructorArgs() const { return NumConstructorArgs; } 648 Expr *getConstructorArg(unsigned i) { 649 assert(i < NumConstructorArgs && "Index out of range"); 650 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 651 } 652 const Expr *getConstructorArg(unsigned i) const { 653 assert(i < NumConstructorArgs && "Index out of range"); 654 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 655 } 656 657 typedef ExprIterator arg_iterator; 658 typedef ConstExprIterator const_arg_iterator; 659 660 arg_iterator placement_arg_begin() { 661 return SubExprs + Array; 662 } 663 arg_iterator placement_arg_end() { 664 return SubExprs + Array + getNumPlacementArgs(); 665 } 666 const_arg_iterator placement_arg_begin() const { 667 return SubExprs + Array; 668 } 669 const_arg_iterator placement_arg_end() const { 670 return SubExprs + Array + getNumPlacementArgs(); 671 } 672 673 arg_iterator constructor_arg_begin() { 674 return SubExprs + Array + getNumPlacementArgs(); 675 } 676 arg_iterator constructor_arg_end() { 677 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 678 } 679 const_arg_iterator constructor_arg_begin() const { 680 return SubExprs + Array + getNumPlacementArgs(); 681 } 682 const_arg_iterator constructor_arg_end() const { 683 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 684 } 685 686 virtual SourceRange getSourceRange() const { 687 return SourceRange(StartLoc, EndLoc); 688 } 689 690 static bool classof(const Stmt *T) { 691 return T->getStmtClass() == CXXNewExprClass; 692 } 693 static bool classof(const CXXNewExpr *) { return true; } 694 695 // Iterators 696 virtual child_iterator child_begin(); 697 virtual child_iterator child_end(); 698}; 699 700/// CXXDeleteExpr - A delete expression for memory deallocation and destructor 701/// calls, e.g. "delete[] pArray". 702class CXXDeleteExpr : public Expr { 703 // Is this a forced global delete, i.e. "::delete"? 704 bool GlobalDelete : 1; 705 // Is this the array form of delete, i.e. "delete[]"? 706 bool ArrayForm : 1; 707 // Points to the operator delete overload that is used. Could be a member. 708 FunctionDecl *OperatorDelete; 709 // The pointer expression to be deleted. 710 Stmt *Argument; 711 // Location of the expression. 712 SourceLocation Loc; 713public: 714 CXXDeleteExpr(QualType ty, bool globalDelete, bool arrayForm, 715 FunctionDecl *operatorDelete, Expr *arg, SourceLocation loc) 716 : Expr(CXXDeleteExprClass, ty, false, false), GlobalDelete(globalDelete), 717 ArrayForm(arrayForm), OperatorDelete(operatorDelete), Argument(arg), 718 Loc(loc) { } 719 720 bool isGlobalDelete() const { return GlobalDelete; } 721 bool isArrayForm() const { return ArrayForm; } 722 723 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 724 725 Expr *getArgument() { return cast<Expr>(Argument); } 726 const Expr *getArgument() const { return cast<Expr>(Argument); } 727 728 virtual SourceRange getSourceRange() const { 729 return SourceRange(Loc, Argument->getLocEnd()); 730 } 731 732 static bool classof(const Stmt *T) { 733 return T->getStmtClass() == CXXDeleteExprClass; 734 } 735 static bool classof(const CXXDeleteExpr *) { return true; } 736 737 // Iterators 738 virtual child_iterator child_begin(); 739 virtual child_iterator child_end(); 740}; 741 742/// \brief Represents the name of a function that has not been 743/// resolved to any declaration. 744/// 745/// Unresolved function names occur when a function name is 746/// encountered prior to an open parentheses ('(') in a C++ function 747/// call, and the function name itself did not resolve to a 748/// declaration. These function names can only be resolved when they 749/// form the postfix-expression of a function call, so that 750/// argument-dependent lookup finds declarations corresponding to 751/// these functions. 752 753/// @code 754/// template<typename T> void f(T x) { 755/// g(x); // g is an unresolved function name (that is also a dependent name) 756/// } 757/// @endcode 758class UnresolvedFunctionNameExpr : public Expr { 759 /// The name that was present in the source 760 DeclarationName Name; 761 762 /// The location of this name in the source code 763 SourceLocation Loc; 764 765public: 766 UnresolvedFunctionNameExpr(DeclarationName N, QualType T, SourceLocation L) 767 : Expr(UnresolvedFunctionNameExprClass, T, false, false), Name(N), Loc(L) { } 768 769 /// \brief Retrieves the name that occurred in the source code. 770 DeclarationName getName() const { return Name; } 771 772 /// getLocation - Retrieves the location in the source code where 773 /// the name occurred. 774 SourceLocation getLocation() const { return Loc; } 775 776 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 777 778 static bool classof(const Stmt *T) { 779 return T->getStmtClass() == UnresolvedFunctionNameExprClass; 780 } 781 static bool classof(const UnresolvedFunctionNameExpr *) { return true; } 782 783 // Iterators 784 virtual child_iterator child_begin(); 785 virtual child_iterator child_end(); 786}; 787 788/// UnaryTypeTraitExpr - A GCC or MS unary type trait, as used in the 789/// implementation of TR1/C++0x type trait templates. 790/// Example: 791/// __is_pod(int) == true 792/// __is_enum(std::string) == false 793class UnaryTypeTraitExpr : public Expr { 794 /// UTT - The trait. 795 UnaryTypeTrait UTT; 796 797 /// Loc - The location of the type trait keyword. 798 SourceLocation Loc; 799 800 /// RParen - The location of the closing paren. 801 SourceLocation RParen; 802 803 /// QueriedType - The type we're testing. 804 QualType QueriedType; 805 806public: 807 UnaryTypeTraitExpr(SourceLocation loc, UnaryTypeTrait utt, QualType queried, 808 SourceLocation rparen, QualType ty) 809 : Expr(UnaryTypeTraitExprClass, ty, false, queried->isDependentType()), 810 UTT(utt), Loc(loc), RParen(rparen), QueriedType(queried) { } 811 812 virtual SourceRange getSourceRange() const { return SourceRange(Loc, RParen);} 813 814 UnaryTypeTrait getTrait() const { return UTT; } 815 816 QualType getQueriedType() const { return QueriedType; } 817 818 bool EvaluateTrait() const; 819 820 static bool classof(const Stmt *T) { 821 return T->getStmtClass() == UnaryTypeTraitExprClass; 822 } 823 static bool classof(const UnaryTypeTraitExpr *) { return true; } 824 825 // Iterators 826 virtual child_iterator child_begin(); 827 virtual child_iterator child_end(); 828}; 829 830/// QualifiedDeclRefExpr - A reference to a declared variable, 831/// function, enum, etc., that includes a qualification, e.g., 832/// "N::foo". 833class QualifiedDeclRefExpr : public DeclRefExpr { 834 /// QualifierRange - The source range that covers the 835 /// nested-name-specifier. 836 SourceRange QualifierRange; 837 838 /// \brief The nested-name-specifier that qualifies this declaration 839 /// name. 840 NestedNameSpecifier *NNS; 841 842public: 843 QualifiedDeclRefExpr(NamedDecl *d, QualType t, SourceLocation l, bool TD, 844 bool VD, SourceRange R, NestedNameSpecifier *NNS) 845 : DeclRefExpr(QualifiedDeclRefExprClass, d, t, l, TD, VD), 846 QualifierRange(R), NNS(NNS) { } 847 848 /// \brief Retrieve the source range of the nested-name-specifier. 849 SourceRange getQualifierRange() const { return QualifierRange; } 850 851 /// \brief Retrieve the nested-name-specifier that qualifies this 852 /// declaration. 853 NestedNameSpecifier *getQualifier() const { return NNS; } 854 855 virtual SourceRange getSourceRange() const { 856 return SourceRange(QualifierRange.getBegin(), getLocation()); 857 } 858 859 static bool classof(const Stmt *T) { 860 return T->getStmtClass() == QualifiedDeclRefExprClass; 861 } 862 static bool classof(const QualifiedDeclRefExpr *) { return true; } 863}; 864 865/// \brief A qualified reference to a name whose declaration cannot 866/// yet be resolved. 867/// 868/// UnresolvedDeclRefExpr is similar to QualifiedDeclRefExpr in that 869/// it expresses a qualified reference to a declaration such as 870/// X<T>::value. The difference, however, is that an 871/// UnresolvedDeclRefExpr node is used only within C++ templates when 872/// the qualification (e.g., X<T>::) refers to a dependent type. In 873/// this case, X<T>::value cannot resolve to a declaration because the 874/// declaration will differ from on instantiation of X<T> to the 875/// next. Therefore, UnresolvedDeclRefExpr keeps track of the 876/// qualifier (X<T>::) and the name of the entity being referenced 877/// ("value"). Such expressions will instantiate to 878/// QualifiedDeclRefExprs. 879class UnresolvedDeclRefExpr : public Expr { 880 /// The name of the entity we will be referencing. 881 DeclarationName Name; 882 883 /// Location of the name of the declaration we're referencing. 884 SourceLocation Loc; 885 886 /// QualifierRange - The source range that covers the 887 /// nested-name-specifier. 888 SourceRange QualifierRange; 889 890 /// \brief The nested-name-specifier that qualifies this unresolved 891 /// declaration name. 892 NestedNameSpecifier *NNS; 893 894public: 895 UnresolvedDeclRefExpr(DeclarationName N, QualType T, SourceLocation L, 896 SourceRange R, NestedNameSpecifier *NNS) 897 : Expr(UnresolvedDeclRefExprClass, T, true, true), 898 Name(N), Loc(L), QualifierRange(R), NNS(NNS) { } 899 900 /// \brief Retrieve the name that this expression refers to. 901 DeclarationName getDeclName() const { return Name; } 902 903 /// \brief Retrieve the location of the name within the expression. 904 SourceLocation getLocation() const { return Loc; } 905 906 /// \brief Retrieve the source range of the nested-name-specifier. 907 SourceRange getQualifierRange() const { return QualifierRange; } 908 909 /// \brief Retrieve the nested-name-specifier that qualifies this 910 /// declaration. 911 NestedNameSpecifier *getQualifier() const { return NNS; } 912 913 virtual SourceRange getSourceRange() const { 914 return SourceRange(QualifierRange.getBegin(), getLocation()); 915 } 916 917 static bool classof(const Stmt *T) { 918 return T->getStmtClass() == UnresolvedDeclRefExprClass; 919 } 920 static bool classof(const UnresolvedDeclRefExpr *) { return true; } 921 922 virtual StmtIterator child_begin(); 923 virtual StmtIterator child_end(); 924}; 925 926/// CXXDestroyExpr - Represents an implicit call to a C++ destructor. 927class CXXDestroyExpr : public Expr { 928 VarDecl *VD; 929 930 CXXDestroyExpr(VarDecl* vd, QualType T) 931 : Expr(CXXDestroyExprClass, T, false, vd->getType()->isDependentType()), 932 VD(vd) { } 933 934public: 935 static CXXDestroyExpr *Create(ASTContext &C, VarDecl *vd); 936 937 virtual SourceRange getSourceRange() const { return SourceRange(); } 938 939 // Implement isa/cast/dyncast/etc. 940 static bool classof(const Stmt *T) { 941 return T->getStmtClass() == CXXDestroyExprClass; 942 } 943 static bool classof(const CXXDestroyExpr *) { return true; } 944 945 // Iterators 946 virtual child_iterator child_begin(); 947 virtual child_iterator child_end(); 948}; 949 950class CXXExprWithCleanup : public Expr { 951 Stmt *SubExpr; 952 953 CXXTempVarDecl **Decls; 954 unsigned NumDecls; 955 956public: 957 CXXExprWithCleanup(Expr *subexpr, CXXTempVarDecl **decls, unsigned numdecls); 958 ~CXXExprWithCleanup(); 959 960 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 961 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 962 963 virtual SourceRange getSourceRange() const { return SourceRange(); } 964 965 // Implement isa/cast/dyncast/etc. 966 static bool classof(const Stmt *T) { 967 return T->getStmtClass() == CXXExprWithCleanupClass; 968 } 969 static bool classof(const CXXExprWithCleanup *) { return true; } 970 971 // Iterators 972 virtual child_iterator child_begin(); 973 virtual child_iterator child_end(); 974}; 975 976} // end namespace clang 977 978#endif 979