ExprCXX.h revision bcb11d01c034f967503bd98f28bdf458c1ab8001
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 CXXDestructorDecl; 25 class CXXMethodDecl; 26 class CXXTemporary; 27 28//===--------------------------------------------------------------------===// 29// C++ Expressions. 30//===--------------------------------------------------------------------===// 31 32/// \brief A call to an overloaded operator written using operator 33/// syntax. 34/// 35/// Represents a call to an overloaded operator written using operator 36/// syntax, e.g., "x + y" or "*p". While semantically equivalent to a 37/// normal call, this AST node provides better information about the 38/// syntactic representation of the call. 39/// 40/// In a C++ template, this expression node kind will be used whenever 41/// any of the arguments are type-dependent. In this case, the 42/// function itself will be a (possibly empty) set of functions and 43/// function templates that were found by name lookup at template 44/// definition time. 45class CXXOperatorCallExpr : public CallExpr { 46 /// \brief The overloaded operator. 47 OverloadedOperatorKind Operator; 48 49public: 50 CXXOperatorCallExpr(ASTContext& C, OverloadedOperatorKind Op, Expr *fn, 51 Expr **args, unsigned numargs, QualType t, 52 SourceLocation operatorloc) 53 : CallExpr(C, CXXOperatorCallExprClass, fn, args, numargs, t, operatorloc), 54 Operator(Op) {} 55 explicit CXXOperatorCallExpr(ASTContext& C, EmptyShell Empty) : 56 CallExpr(C, CXXOperatorCallExprClass, Empty) { } 57 58 59 /// getOperator - Returns the kind of overloaded operator that this 60 /// expression refers to. 61 OverloadedOperatorKind getOperator() const { return Operator; } 62 void setOperator(OverloadedOperatorKind Kind) { Operator = Kind; } 63 64 /// getOperatorLoc - Returns the location of the operator symbol in 65 /// the expression. When @c getOperator()==OO_Call, this is the 66 /// location of the right parentheses; when @c 67 /// getOperator()==OO_Subscript, this is the location of the right 68 /// bracket. 69 SourceLocation getOperatorLoc() const { return getRParenLoc(); } 70 71 virtual SourceRange getSourceRange() const; 72 73 static bool classof(const Stmt *T) { 74 return T->getStmtClass() == CXXOperatorCallExprClass; 75 } 76 static bool classof(const CXXOperatorCallExpr *) { return true; } 77}; 78 79/// CXXMemberCallExpr - Represents a call to a member function that 80/// may be written either with member call syntax (e.g., "obj.func()" 81/// or "objptr->func()") or with normal function-call syntax 82/// ("func()") within a member function that ends up calling a member 83/// function. The callee in either case is a MemberExpr that contains 84/// both the object argument and the member function, while the 85/// arguments are the arguments within the parentheses (not including 86/// the object argument). 87class CXXMemberCallExpr : public CallExpr { 88public: 89 CXXMemberCallExpr(ASTContext& C, Expr *fn, Expr **args, unsigned numargs, 90 QualType t, SourceLocation rparenloc) 91 : CallExpr(C, CXXMemberCallExprClass, fn, args, numargs, t, rparenloc) {} 92 93 /// getImplicitObjectArgument - Retrieves the implicit object 94 /// argument for the member call. For example, in "x.f(5)", this 95 /// operation would return "x". 96 Expr *getImplicitObjectArgument(); 97 98 static bool classof(const Stmt *T) { 99 return T->getStmtClass() == CXXMemberCallExprClass; 100 } 101 static bool classof(const CXXMemberCallExpr *) { return true; } 102}; 103 104/// CXXNamedCastExpr - Abstract class common to all of the C++ "named" 105/// casts, @c static_cast, @c dynamic_cast, @c reinterpret_cast, or @c 106/// const_cast. 107/// 108/// This abstract class is inherited by all of the classes 109/// representing "named" casts, e.g., CXXStaticCastExpr, 110/// CXXDynamicCastExpr, CXXReinterpretCastExpr, and CXXConstCastExpr. 111class CXXNamedCastExpr : public ExplicitCastExpr { 112private: 113 SourceLocation Loc; // the location of the casting op 114 115protected: 116 CXXNamedCastExpr(StmtClass SC, QualType ty, const CastInfo &info, Expr *op, 117 QualType writtenTy, SourceLocation l) 118 : ExplicitCastExpr(SC, ty, info, op, writtenTy), Loc(l) {} 119 120public: 121 const char *getCastName() const; 122 123 /// \brief Retrieve the location of the cast operator keyword, e.g., 124 /// "static_cast". 125 SourceLocation getOperatorLoc() const { return Loc; } 126 void setOperatorLoc(SourceLocation L) { Loc = L; } 127 128 virtual SourceRange getSourceRange() const { 129 return SourceRange(Loc, getSubExpr()->getSourceRange().getEnd()); 130 } 131 static bool classof(const Stmt *T) { 132 switch (T->getStmtClass()) { 133 case CXXNamedCastExprClass: 134 case CXXStaticCastExprClass: 135 case CXXDynamicCastExprClass: 136 case CXXReinterpretCastExprClass: 137 case CXXConstCastExprClass: 138 return true; 139 default: 140 return false; 141 } 142 } 143 static bool classof(const CXXNamedCastExpr *) { return true; } 144}; 145 146/// CXXStaticCastExpr - A C++ @c static_cast expression (C++ [expr.static.cast]). 147/// 148/// This expression node represents a C++ static cast, e.g., 149/// @c static_cast<int>(1.0). 150class CXXStaticCastExpr : public CXXNamedCastExpr { 151public: 152 CXXStaticCastExpr(QualType ty, const CastInfo &info, Expr *op, 153 QualType writtenTy, SourceLocation l) 154 : CXXNamedCastExpr(CXXStaticCastExprClass, ty, info, op, writtenTy, l) {} 155 156 static bool classof(const Stmt *T) { 157 return T->getStmtClass() == CXXStaticCastExprClass; 158 } 159 static bool classof(const CXXStaticCastExpr *) { return true; } 160}; 161 162/// CXXDynamicCastExpr - A C++ @c dynamic_cast expression 163/// (C++ [expr.dynamic.cast]), which may perform a run-time check to 164/// determine how to perform the type cast. 165/// 166/// This expression node represents a dynamic cast, e.g., 167/// @c dynamic_cast<Derived*>(BasePtr). 168class CXXDynamicCastExpr : public CXXNamedCastExpr { 169public: 170 CXXDynamicCastExpr(QualType ty, CastKind kind, Expr *op, QualType writtenTy, 171 SourceLocation l) 172 : CXXNamedCastExpr(CXXDynamicCastExprClass, ty, kind, op, writtenTy, l) {} 173 174 static bool classof(const Stmt *T) { 175 return T->getStmtClass() == CXXDynamicCastExprClass; 176 } 177 static bool classof(const CXXDynamicCastExpr *) { return true; } 178}; 179 180/// CXXReinterpretCastExpr - A C++ @c reinterpret_cast expression (C++ 181/// [expr.reinterpret.cast]), which provides a differently-typed view 182/// of a value but performs no actual work at run time. 183/// 184/// This expression node represents a reinterpret cast, e.g., 185/// @c reinterpret_cast<int>(VoidPtr). 186class CXXReinterpretCastExpr : public CXXNamedCastExpr { 187public: 188 CXXReinterpretCastExpr(QualType ty, Expr *op, QualType writtenTy, 189 SourceLocation l) 190 : CXXNamedCastExpr(CXXReinterpretCastExprClass, ty, CK_BitCast, op, 191 writtenTy, l) {} 192 193 static bool classof(const Stmt *T) { 194 return T->getStmtClass() == CXXReinterpretCastExprClass; 195 } 196 static bool classof(const CXXReinterpretCastExpr *) { return true; } 197}; 198 199/// CXXConstCastExpr - A C++ @c const_cast expression (C++ [expr.const.cast]), 200/// which can remove type qualifiers but does not change the underlying value. 201/// 202/// This expression node represents a const cast, e.g., 203/// @c const_cast<char*>(PtrToConstChar). 204class CXXConstCastExpr : public CXXNamedCastExpr { 205public: 206 CXXConstCastExpr(QualType ty, Expr *op, QualType writtenTy, 207 SourceLocation l) 208 : CXXNamedCastExpr(CXXConstCastExprClass, ty, CK_NoOp, op, writtenTy, l) {} 209 210 static bool classof(const Stmt *T) { 211 return T->getStmtClass() == CXXConstCastExprClass; 212 } 213 static bool classof(const CXXConstCastExpr *) { return true; } 214}; 215 216/// CXXBoolLiteralExpr - [C++ 2.13.5] C++ Boolean Literal. 217/// 218class CXXBoolLiteralExpr : public Expr { 219 bool Value; 220 SourceLocation Loc; 221public: 222 CXXBoolLiteralExpr(bool val, QualType Ty, SourceLocation l) : 223 Expr(CXXBoolLiteralExprClass, Ty), Value(val), Loc(l) {} 224 225 bool getValue() const { return Value; } 226 227 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 228 229 static bool classof(const Stmt *T) { 230 return T->getStmtClass() == CXXBoolLiteralExprClass; 231 } 232 static bool classof(const CXXBoolLiteralExpr *) { return true; } 233 234 // Iterators 235 virtual child_iterator child_begin(); 236 virtual child_iterator child_end(); 237}; 238 239/// CXXNullPtrLiteralExpr - [C++0x 2.14.7] C++ Pointer Literal 240class CXXNullPtrLiteralExpr : public Expr { 241 SourceLocation Loc; 242public: 243 CXXNullPtrLiteralExpr(QualType Ty, SourceLocation l) : 244 Expr(CXXNullPtrLiteralExprClass, Ty), Loc(l) {} 245 246 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 247 248 static bool classof(const Stmt *T) { 249 return T->getStmtClass() == CXXNullPtrLiteralExprClass; 250 } 251 static bool classof(const CXXNullPtrLiteralExpr *) { return true; } 252 253 virtual child_iterator child_begin(); 254 virtual child_iterator child_end(); 255}; 256 257/// CXXTypeidExpr - A C++ @c typeid expression (C++ [expr.typeid]), which gets 258/// the type_info that corresponds to the supplied type, or the (possibly 259/// dynamic) type of the supplied expression. 260/// 261/// This represents code like @c typeid(int) or @c typeid(*objPtr) 262class CXXTypeidExpr : public Expr { 263private: 264 bool isTypeOp : 1; 265 union { 266 void *Ty; 267 Stmt *Ex; 268 } Operand; 269 SourceRange Range; 270 271public: 272 CXXTypeidExpr(bool isTypeOp, void *op, QualType Ty, const SourceRange r) : 273 Expr(CXXTypeidExprClass, Ty, 274 // typeid is never type-dependent (C++ [temp.dep.expr]p4) 275 false, 276 // typeid is value-dependent if the type or expression are dependent 277 (isTypeOp ? QualType::getFromOpaquePtr(op)->isDependentType() 278 : static_cast<Expr*>(op)->isValueDependent())), 279 isTypeOp(isTypeOp), Range(r) { 280 if (isTypeOp) 281 Operand.Ty = op; 282 else 283 // op was an Expr*, so cast it back to that to be safe 284 Operand.Ex = static_cast<Expr*>(op); 285 } 286 287 bool isTypeOperand() const { return isTypeOp; } 288 QualType getTypeOperand() const { 289 assert(isTypeOperand() && "Cannot call getTypeOperand for typeid(expr)"); 290 return QualType::getFromOpaquePtr(Operand.Ty); 291 } 292 Expr* getExprOperand() const { 293 assert(!isTypeOperand() && "Cannot call getExprOperand for typeid(type)"); 294 return static_cast<Expr*>(Operand.Ex); 295 } 296 297 virtual SourceRange getSourceRange() const { 298 return Range; 299 } 300 static bool classof(const Stmt *T) { 301 return T->getStmtClass() == CXXTypeidExprClass; 302 } 303 static bool classof(const CXXTypeidExpr *) { return true; } 304 305 // Iterators 306 virtual child_iterator child_begin(); 307 virtual child_iterator child_end(); 308}; 309 310/// CXXThisExpr - Represents the "this" expression in C++, which is a 311/// pointer to the object on which the current member function is 312/// executing (C++ [expr.prim]p3). Example: 313/// 314/// @code 315/// class Foo { 316/// public: 317/// void bar(); 318/// void test() { this->bar(); } 319/// }; 320/// @endcode 321class CXXThisExpr : public Expr { 322 SourceLocation Loc; 323 324public: 325 CXXThisExpr(SourceLocation L, QualType Type) 326 : Expr(CXXThisExprClass, Type, 327 // 'this' is type-dependent if the class type of the enclosing 328 // member function is dependent (C++ [temp.dep.expr]p2) 329 Type->isDependentType(), Type->isDependentType()), 330 Loc(L) { } 331 332 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 333 334 static bool classof(const Stmt *T) { 335 return T->getStmtClass() == CXXThisExprClass; 336 } 337 static bool classof(const CXXThisExpr *) { return true; } 338 339 // Iterators 340 virtual child_iterator child_begin(); 341 virtual child_iterator child_end(); 342}; 343 344/// CXXThrowExpr - [C++ 15] C++ Throw Expression. This handles 345/// 'throw' and 'throw' assignment-expression. When 346/// assignment-expression isn't present, Op will be null. 347/// 348class CXXThrowExpr : public Expr { 349 Stmt *Op; 350 SourceLocation ThrowLoc; 351public: 352 // Ty is the void type which is used as the result type of the 353 // exepression. The l is the location of the throw keyword. expr 354 // can by null, if the optional expression to throw isn't present. 355 CXXThrowExpr(Expr *expr, QualType Ty, SourceLocation l) : 356 Expr(CXXThrowExprClass, Ty, false, false), Op(expr), ThrowLoc(l) {} 357 const Expr *getSubExpr() const { return cast_or_null<Expr>(Op); } 358 Expr *getSubExpr() { return cast_or_null<Expr>(Op); } 359 void setSubExpr(Expr *E) { Op = E; } 360 361 SourceLocation getThrowLoc() const { return ThrowLoc; } 362 void setThrowLoc(SourceLocation L) { ThrowLoc = L; } 363 364 virtual SourceRange getSourceRange() const { 365 if (getSubExpr() == 0) 366 return SourceRange(ThrowLoc, ThrowLoc); 367 return SourceRange(ThrowLoc, getSubExpr()->getSourceRange().getEnd()); 368 } 369 370 static bool classof(const Stmt *T) { 371 return T->getStmtClass() == CXXThrowExprClass; 372 } 373 static bool classof(const CXXThrowExpr *) { return true; } 374 375 // Iterators 376 virtual child_iterator child_begin(); 377 virtual child_iterator child_end(); 378}; 379 380/// CXXDefaultArgExpr - C++ [dcl.fct.default]. This wraps up a 381/// function call argument that was created from the corresponding 382/// parameter's default argument, when the call did not explicitly 383/// supply arguments for all of the parameters. 384class CXXDefaultArgExpr : public Expr { 385 ParmVarDecl *Param; 386 387protected: 388 CXXDefaultArgExpr(StmtClass SC, ParmVarDecl *param) 389 : Expr(SC, param->hasUnparsedDefaultArg() ? 390 param->getType().getNonReferenceType() 391 : param->getDefaultArg()->getType()), 392 Param(param) { } 393 394public: 395 // Param is the parameter whose default argument is used by this 396 // expression. 397 static CXXDefaultArgExpr *Create(ASTContext &C, ParmVarDecl *Param) { 398 return new (C) CXXDefaultArgExpr(CXXDefaultArgExprClass, Param); 399 } 400 401 // Retrieve the parameter that the argument was created from. 402 const ParmVarDecl *getParam() const { return Param; } 403 ParmVarDecl *getParam() { return Param; } 404 405 // Retrieve the actual argument to the function call. 406 const Expr *getExpr() const { return Param->getDefaultArg(); } 407 Expr *getExpr() { return Param->getDefaultArg(); } 408 409 virtual SourceRange getSourceRange() const { 410 // Default argument expressions have no representation in the 411 // source, so they have an empty source range. 412 return SourceRange(); 413 } 414 415 static bool classof(const Stmt *T) { 416 return T->getStmtClass() == CXXDefaultArgExprClass; 417 } 418 static bool classof(const CXXDefaultArgExpr *) { return true; } 419 420 // Iterators 421 virtual child_iterator child_begin(); 422 virtual child_iterator child_end(); 423}; 424 425/// CXXTemporary - Represents a C++ temporary. 426class CXXTemporary { 427 /// Destructor - The destructor that needs to be called. 428 const CXXDestructorDecl *Destructor; 429 430 CXXTemporary(const CXXDestructorDecl *destructor) 431 : Destructor(destructor) { } 432 ~CXXTemporary() { } 433 434public: 435 static CXXTemporary *Create(ASTContext &C, 436 const CXXDestructorDecl *Destructor); 437 438 void Destroy(ASTContext &Ctx); 439 440 const CXXDestructorDecl *getDestructor() const { return Destructor; } 441}; 442 443/// CXXBindTemporaryExpr - Represents binding an expression to a temporary, 444/// so its destructor can be called later. 445class CXXBindTemporaryExpr : public Expr { 446 CXXTemporary *Temp; 447 448 Stmt *SubExpr; 449 450 CXXBindTemporaryExpr(CXXTemporary *temp, Expr* subexpr) 451 : Expr(CXXBindTemporaryExprClass, 452 subexpr->getType()), Temp(temp), SubExpr(subexpr) { } 453 ~CXXBindTemporaryExpr() { } 454 455protected: 456 virtual void DoDestroy(ASTContext &C); 457 458public: 459 static CXXBindTemporaryExpr *Create(ASTContext &C, CXXTemporary *Temp, 460 Expr* SubExpr); 461 462 CXXTemporary *getTemporary() { return Temp; } 463 const CXXTemporary *getTemporary() const { return Temp; } 464 465 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 466 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 467 void setSubExpr(Expr *E) { SubExpr = E; } 468 469 virtual SourceRange getSourceRange() const { return SourceRange(); } 470 471 // Implement isa/cast/dyncast/etc. 472 static bool classof(const Stmt *T) { 473 return T->getStmtClass() == CXXBindTemporaryExprClass; 474 } 475 static bool classof(const CXXBindTemporaryExpr *) { return true; } 476 477 // Iterators 478 virtual child_iterator child_begin(); 479 virtual child_iterator child_end(); 480}; 481 482/// CXXConstructExpr - Represents a call to a C++ constructor. 483class CXXConstructExpr : public Expr { 484 CXXConstructorDecl *Constructor; 485 486 bool Elidable; 487 488 Stmt **Args; 489 unsigned NumArgs; 490 491protected: 492 CXXConstructExpr(ASTContext &C, StmtClass SC, QualType T, 493 CXXConstructorDecl *d, bool elidable, 494 Expr **args, unsigned numargs); 495 ~CXXConstructExpr() { } 496 497 virtual void DoDestroy(ASTContext &C); 498 499public: 500 static CXXConstructExpr *Create(ASTContext &C, QualType T, 501 CXXConstructorDecl *D, bool Elidable, 502 Expr **Args, unsigned NumArgs); 503 504 505 CXXConstructorDecl* getConstructor() const { return Constructor; } 506 507 /// \brief Whether this construction is elidable. 508 bool isElidable() const { return Elidable; } 509 510 typedef ExprIterator arg_iterator; 511 typedef ConstExprIterator const_arg_iterator; 512 513 arg_iterator arg_begin() { return Args; } 514 arg_iterator arg_end() { return Args + NumArgs; } 515 const_arg_iterator arg_begin() const { return Args; } 516 const_arg_iterator arg_end() const { return Args + NumArgs; } 517 518 unsigned getNumArgs() const { return NumArgs; } 519 520 /// getArg - Return the specified argument. 521 Expr *getArg(unsigned Arg) { 522 assert(Arg < NumArgs && "Arg access out of range!"); 523 return cast<Expr>(Args[Arg]); 524 } 525 const Expr *getArg(unsigned Arg) const { 526 assert(Arg < NumArgs && "Arg access out of range!"); 527 return cast<Expr>(Args[Arg]); 528 } 529 530 /// setArg - Set the specified argument. 531 void setArg(unsigned Arg, Expr *ArgExpr) { 532 assert(Arg < NumArgs && "Arg access out of range!"); 533 Args[Arg] = ArgExpr; 534 } 535 536 virtual SourceRange getSourceRange() const { return SourceRange(); } 537 538 static bool classof(const Stmt *T) { 539 return T->getStmtClass() == CXXConstructExprClass || 540 T->getStmtClass() == CXXTemporaryObjectExprClass; 541 } 542 static bool classof(const CXXConstructExpr *) { return true; } 543 544 // Iterators 545 virtual child_iterator child_begin(); 546 virtual child_iterator child_end(); 547}; 548 549/// CXXFunctionalCastExpr - Represents an explicit C++ type conversion 550/// that uses "functional" notion (C++ [expr.type.conv]). Example: @c 551/// x = int(0.5); 552class CXXFunctionalCastExpr : public ExplicitCastExpr { 553 CXXMethodDecl *TypeConversionMethod; 554 SourceLocation TyBeginLoc; 555 SourceLocation RParenLoc; 556public: 557 CXXFunctionalCastExpr(QualType ty, QualType writtenTy, 558 SourceLocation tyBeginLoc, CastKind kind, 559 Expr *castExpr, CXXMethodDecl *typeConversionMethod, 560 SourceLocation rParenLoc) : 561 ExplicitCastExpr(CXXFunctionalCastExprClass, ty, kind, castExpr, writtenTy), 562 TypeConversionMethod(typeConversionMethod), 563 TyBeginLoc(tyBeginLoc), RParenLoc(rParenLoc) {} 564 565 CXXMethodDecl *getTypeConversionMethod() const 566 { return TypeConversionMethod; } 567 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 568 SourceLocation getRParenLoc() const { return RParenLoc; } 569 570 virtual SourceRange getSourceRange() const { 571 return SourceRange(TyBeginLoc, RParenLoc); 572 } 573 static bool classof(const Stmt *T) { 574 return T->getStmtClass() == CXXFunctionalCastExprClass; 575 } 576 static bool classof(const CXXFunctionalCastExpr *) { return true; } 577}; 578 579/// @brief Represents a C++ functional cast expression that builds a 580/// temporary object. 581/// 582/// This expression type represents a C++ "functional" cast 583/// (C++[expr.type.conv]) with N != 1 arguments that invokes a 584/// constructor to build a temporary object. If N == 0 but no 585/// constructor will be called (because the functional cast is 586/// performing a value-initialized an object whose class type has no 587/// user-declared constructors), CXXZeroInitValueExpr will represent 588/// the functional cast. Finally, with N == 1 arguments the functional 589/// cast expression will be represented by CXXFunctionalCastExpr. 590/// Example: 591/// @code 592/// struct X { X(int, float); } 593/// 594/// X create_X() { 595/// return X(1, 3.14f); // creates a CXXTemporaryObjectExpr 596/// }; 597/// @endcode 598class CXXTemporaryObjectExpr : public CXXConstructExpr { 599 SourceLocation TyBeginLoc; 600 SourceLocation RParenLoc; 601 602public: 603 CXXTemporaryObjectExpr(ASTContext &C, CXXConstructorDecl *Cons, 604 QualType writtenTy, SourceLocation tyBeginLoc, 605 Expr **Args,unsigned NumArgs, 606 SourceLocation rParenLoc); 607 608 ~CXXTemporaryObjectExpr() { } 609 610 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 611 SourceLocation getRParenLoc() const { return RParenLoc; } 612 613 virtual SourceRange getSourceRange() const { 614 return SourceRange(TyBeginLoc, RParenLoc); 615 } 616 static bool classof(const Stmt *T) { 617 return T->getStmtClass() == CXXTemporaryObjectExprClass; 618 } 619 static bool classof(const CXXTemporaryObjectExpr *) { return true; } 620}; 621 622/// CXXZeroInitValueExpr - [C++ 5.2.3p2] 623/// Expression "T()" which creates a value-initialized rvalue of type 624/// T, which is either a non-class type or a class type without any 625/// user-defined constructors. 626/// 627class CXXZeroInitValueExpr : public Expr { 628 SourceLocation TyBeginLoc; 629 SourceLocation RParenLoc; 630 631public: 632 CXXZeroInitValueExpr(QualType ty, SourceLocation tyBeginLoc, 633 SourceLocation rParenLoc ) : 634 Expr(CXXZeroInitValueExprClass, ty, false, false), 635 TyBeginLoc(tyBeginLoc), RParenLoc(rParenLoc) {} 636 637 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 638 SourceLocation getRParenLoc() const { return RParenLoc; } 639 640 /// @brief Whether this initialization expression was 641 /// implicitly-generated. 642 bool isImplicit() const { 643 return TyBeginLoc.isInvalid() && RParenLoc.isInvalid(); 644 } 645 646 virtual SourceRange getSourceRange() const { 647 return SourceRange(TyBeginLoc, RParenLoc); 648 } 649 650 static bool classof(const Stmt *T) { 651 return T->getStmtClass() == CXXZeroInitValueExprClass; 652 } 653 static bool classof(const CXXZeroInitValueExpr *) { return true; } 654 655 // Iterators 656 virtual child_iterator child_begin(); 657 virtual child_iterator child_end(); 658}; 659 660/// CXXConditionDeclExpr - Condition declaration of a if/switch/while/for 661/// statement, e.g: "if (int x = f()) {...}". 662/// The main difference with DeclRefExpr is that CXXConditionDeclExpr owns the 663/// decl that it references. 664/// 665class CXXConditionDeclExpr : public DeclRefExpr { 666public: 667 CXXConditionDeclExpr(SourceLocation startLoc, 668 SourceLocation eqLoc, VarDecl *var) 669 : DeclRefExpr(CXXConditionDeclExprClass, var, 670 var->getType().getNonReferenceType(), startLoc, 671 var->getType()->isDependentType(), 672 /*FIXME:integral constant?*/ 673 var->getType()->isDependentType()) {} 674 675 SourceLocation getStartLoc() const { return getLocation(); } 676 677 VarDecl *getVarDecl() { return cast<VarDecl>(getDecl()); } 678 const VarDecl *getVarDecl() const { return cast<VarDecl>(getDecl()); } 679 680 virtual SourceRange getSourceRange() const { 681 return SourceRange(getStartLoc(), getVarDecl()->getInit()->getLocEnd()); 682 } 683 684 static bool classof(const Stmt *T) { 685 return T->getStmtClass() == CXXConditionDeclExprClass; 686 } 687 static bool classof(const CXXConditionDeclExpr *) { return true; } 688 689 // Iterators 690 virtual child_iterator child_begin(); 691 virtual child_iterator child_end(); 692}; 693 694/// CXXNewExpr - A new expression for memory allocation and constructor calls, 695/// e.g: "new CXXNewExpr(foo)". 696class CXXNewExpr : public Expr { 697 // Was the usage ::new, i.e. is the global new to be used? 698 bool GlobalNew : 1; 699 // Was the form (type-id) used? Otherwise, it was new-type-id. 700 bool ParenTypeId : 1; 701 // Is there an initializer? If not, built-ins are uninitialized, else they're 702 // value-initialized. 703 bool Initializer : 1; 704 // Do we allocate an array? If so, the first SubExpr is the size expression. 705 bool Array : 1; 706 // The number of placement new arguments. 707 unsigned NumPlacementArgs : 14; 708 // The number of constructor arguments. This may be 1 even for non-class 709 // types; use the pseudo copy constructor. 710 unsigned NumConstructorArgs : 14; 711 // Contains an optional array size expression, any number of optional 712 // placement arguments, and any number of optional constructor arguments, 713 // in that order. 714 Stmt **SubExprs; 715 // Points to the allocation function used. 716 FunctionDecl *OperatorNew; 717 // Points to the deallocation function used in case of error. May be null. 718 FunctionDecl *OperatorDelete; 719 // Points to the constructor used. Cannot be null if AllocType is a record; 720 // it would still point at the default constructor (even an implicit one). 721 // Must be null for all other types. 722 CXXConstructorDecl *Constructor; 723 724 SourceLocation StartLoc; 725 SourceLocation EndLoc; 726 727public: 728 CXXNewExpr(bool globalNew, FunctionDecl *operatorNew, Expr **placementArgs, 729 unsigned numPlaceArgs, bool ParenTypeId, Expr *arraySize, 730 CXXConstructorDecl *constructor, bool initializer, 731 Expr **constructorArgs, unsigned numConsArgs, 732 FunctionDecl *operatorDelete, QualType ty, 733 SourceLocation startLoc, SourceLocation endLoc); 734 ~CXXNewExpr() { 735 delete[] SubExprs; 736 } 737 738 QualType getAllocatedType() const { 739 assert(getType()->isPointerType()); 740 return getType()->getAs<PointerType>()->getPointeeType(); 741 } 742 743 FunctionDecl *getOperatorNew() const { return OperatorNew; } 744 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 745 CXXConstructorDecl *getConstructor() const { return Constructor; } 746 747 bool isArray() const { return Array; } 748 Expr *getArraySize() { 749 return Array ? cast<Expr>(SubExprs[0]) : 0; 750 } 751 const Expr *getArraySize() const { 752 return Array ? cast<Expr>(SubExprs[0]) : 0; 753 } 754 755 unsigned getNumPlacementArgs() const { return NumPlacementArgs; } 756 Expr *getPlacementArg(unsigned i) { 757 assert(i < NumPlacementArgs && "Index out of range"); 758 return cast<Expr>(SubExprs[Array + i]); 759 } 760 const Expr *getPlacementArg(unsigned i) const { 761 assert(i < NumPlacementArgs && "Index out of range"); 762 return cast<Expr>(SubExprs[Array + i]); 763 } 764 765 bool isGlobalNew() const { return GlobalNew; } 766 bool isParenTypeId() const { return ParenTypeId; } 767 bool hasInitializer() const { return Initializer; } 768 769 unsigned getNumConstructorArgs() const { return NumConstructorArgs; } 770 Expr *getConstructorArg(unsigned i) { 771 assert(i < NumConstructorArgs && "Index out of range"); 772 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 773 } 774 const Expr *getConstructorArg(unsigned i) const { 775 assert(i < NumConstructorArgs && "Index out of range"); 776 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 777 } 778 779 typedef ExprIterator arg_iterator; 780 typedef ConstExprIterator const_arg_iterator; 781 782 arg_iterator placement_arg_begin() { 783 return SubExprs + Array; 784 } 785 arg_iterator placement_arg_end() { 786 return SubExprs + Array + getNumPlacementArgs(); 787 } 788 const_arg_iterator placement_arg_begin() const { 789 return SubExprs + Array; 790 } 791 const_arg_iterator placement_arg_end() const { 792 return SubExprs + Array + getNumPlacementArgs(); 793 } 794 795 arg_iterator constructor_arg_begin() { 796 return SubExprs + Array + getNumPlacementArgs(); 797 } 798 arg_iterator constructor_arg_end() { 799 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 800 } 801 const_arg_iterator constructor_arg_begin() const { 802 return SubExprs + Array + getNumPlacementArgs(); 803 } 804 const_arg_iterator constructor_arg_end() const { 805 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 806 } 807 808 virtual SourceRange getSourceRange() const { 809 return SourceRange(StartLoc, EndLoc); 810 } 811 812 static bool classof(const Stmt *T) { 813 return T->getStmtClass() == CXXNewExprClass; 814 } 815 static bool classof(const CXXNewExpr *) { return true; } 816 817 // Iterators 818 virtual child_iterator child_begin(); 819 virtual child_iterator child_end(); 820}; 821 822/// CXXDeleteExpr - A delete expression for memory deallocation and destructor 823/// calls, e.g. "delete[] pArray". 824class CXXDeleteExpr : public Expr { 825 // Is this a forced global delete, i.e. "::delete"? 826 bool GlobalDelete : 1; 827 // Is this the array form of delete, i.e. "delete[]"? 828 bool ArrayForm : 1; 829 // Points to the operator delete overload that is used. Could be a member. 830 FunctionDecl *OperatorDelete; 831 // The pointer expression to be deleted. 832 Stmt *Argument; 833 // Location of the expression. 834 SourceLocation Loc; 835public: 836 CXXDeleteExpr(QualType ty, bool globalDelete, bool arrayForm, 837 FunctionDecl *operatorDelete, Expr *arg, SourceLocation loc) 838 : Expr(CXXDeleteExprClass, ty, false, false), GlobalDelete(globalDelete), 839 ArrayForm(arrayForm), OperatorDelete(operatorDelete), Argument(arg), 840 Loc(loc) { } 841 842 bool isGlobalDelete() const { return GlobalDelete; } 843 bool isArrayForm() const { return ArrayForm; } 844 845 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 846 847 Expr *getArgument() { return cast<Expr>(Argument); } 848 const Expr *getArgument() const { return cast<Expr>(Argument); } 849 850 virtual SourceRange getSourceRange() const { 851 return SourceRange(Loc, Argument->getLocEnd()); 852 } 853 854 static bool classof(const Stmt *T) { 855 return T->getStmtClass() == CXXDeleteExprClass; 856 } 857 static bool classof(const CXXDeleteExpr *) { return true; } 858 859 // Iterators 860 virtual child_iterator child_begin(); 861 virtual child_iterator child_end(); 862}; 863 864/// \brief Represents a C++ pseudo-destructor (C++ [expr.pseudo]). 865/// 866/// Example: 867/// 868/// \code 869/// template<typename T> 870/// void destroy(T* ptr) { 871/// ptr->~T(); 872/// } 873/// \endcode 874/// 875/// When the template is parsed, the expression \c ptr->~T will be stored as 876/// a member reference expression. If it then instantiated with a scalar type 877/// as a template argument for T, the resulting expression will be a 878/// pseudo-destructor expression. 879class CXXPseudoDestructorExpr : public Expr { 880 /// \brief The base expression (that is being destroyed). 881 Stmt *Base; 882 883 /// \brief Whether the operator was an arrow ('->'); otherwise, it was a 884 /// period ('.'). 885 bool IsArrow : 1; 886 887 /// \brief The location of the '.' or '->' operator. 888 SourceLocation OperatorLoc; 889 890 /// \brief The nested-name-specifier that follows the operator, if present. 891 NestedNameSpecifier *Qualifier; 892 893 /// \brief The source range that covers the nested-name-specifier, if 894 /// present. 895 SourceRange QualifierRange; 896 897 /// \brief The type being destroyed. 898 QualType DestroyedType; 899 900 /// \brief The location of the type after the '~'. 901 SourceLocation DestroyedTypeLoc; 902 903public: 904 CXXPseudoDestructorExpr(ASTContext &Context, 905 Expr *Base, bool isArrow, SourceLocation OperatorLoc, 906 NestedNameSpecifier *Qualifier, 907 SourceRange QualifierRange, 908 QualType DestroyedType, 909 SourceLocation DestroyedTypeLoc) 910 : Expr(CXXPseudoDestructorExprClass, 911 Context.getPointerType(Context.getFunctionType(Context.VoidTy, 0, 0, 912 false, 0)), 913 /*isTypeDependent=*/false, 914 /*isValueDependent=*/Base->isValueDependent()), 915 Base(static_cast<Stmt *>(Base)), IsArrow(isArrow), 916 OperatorLoc(OperatorLoc), Qualifier(Qualifier), 917 QualifierRange(QualifierRange), DestroyedType(DestroyedType), 918 DestroyedTypeLoc(DestroyedTypeLoc) { } 919 920 void setBase(Expr *E) { Base = E; } 921 Expr *getBase() const { return cast<Expr>(Base); } 922 923 /// \brief Determines whether this member expression actually had 924 /// a C++ nested-name-specifier prior to the name of the member, e.g., 925 /// x->Base::foo. 926 bool hasQualifier() const { return Qualifier != 0; } 927 928 /// \brief If the member name was qualified, retrieves the source range of 929 /// the nested-name-specifier that precedes the member name. Otherwise, 930 /// returns an empty source range. 931 SourceRange getQualifierRange() const { return QualifierRange; } 932 933 /// \brief If the member name was qualified, retrieves the 934 /// nested-name-specifier that precedes the member name. Otherwise, returns 935 /// NULL. 936 NestedNameSpecifier *getQualifier() const { return Qualifier; } 937 938 /// \brief Determine whether this pseudo-destructor expression was written 939 /// using an '->' (otherwise, it used a '.'). 940 bool isArrow() const { return IsArrow; } 941 void setArrow(bool A) { IsArrow = A; } 942 943 /// \brief Retrieve the location of the '.' or '->' operator. 944 SourceLocation getOperatorLoc() const { return OperatorLoc; } 945 946 /// \brief Retrieve the type that is being destroyed. 947 QualType getDestroyedType() const { return DestroyedType; } 948 949 /// \brief Retrieve the location of the type being destroyed. 950 SourceLocation getDestroyedTypeLoc() const { return DestroyedTypeLoc; } 951 952 virtual SourceRange getSourceRange() const { 953 return SourceRange(Base->getLocStart(), DestroyedTypeLoc); 954 } 955 956 static bool classof(const Stmt *T) { 957 return T->getStmtClass() == CXXPseudoDestructorExprClass; 958 } 959 static bool classof(const CXXPseudoDestructorExpr *) { return true; } 960 961 // Iterators 962 virtual child_iterator child_begin(); 963 virtual child_iterator child_end(); 964}; 965 966/// \brief Represents the name of a function that has not been 967/// resolved to any declaration. 968/// 969/// Unresolved function names occur when a function name is 970/// encountered prior to an open parentheses ('(') in a C++ function 971/// call, and the function name itself did not resolve to a 972/// declaration. These function names can only be resolved when they 973/// form the postfix-expression of a function call, so that 974/// argument-dependent lookup finds declarations corresponding to 975/// these functions. 976 977/// @code 978/// template<typename T> void f(T x) { 979/// g(x); // g is an unresolved function name (that is also a dependent name) 980/// } 981/// @endcode 982class UnresolvedFunctionNameExpr : public Expr { 983 /// The name that was present in the source 984 DeclarationName Name; 985 986 /// The location of this name in the source code 987 SourceLocation Loc; 988 989public: 990 UnresolvedFunctionNameExpr(DeclarationName N, QualType T, SourceLocation L) 991 : Expr(UnresolvedFunctionNameExprClass, T, false, false), Name(N), Loc(L) { } 992 993 /// \brief Retrieves the name that occurred in the source code. 994 DeclarationName getName() const { return Name; } 995 996 /// getLocation - Retrieves the location in the source code where 997 /// the name occurred. 998 SourceLocation getLocation() const { return Loc; } 999 1000 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 1001 1002 static bool classof(const Stmt *T) { 1003 return T->getStmtClass() == UnresolvedFunctionNameExprClass; 1004 } 1005 static bool classof(const UnresolvedFunctionNameExpr *) { return true; } 1006 1007 // Iterators 1008 virtual child_iterator child_begin(); 1009 virtual child_iterator child_end(); 1010}; 1011 1012/// UnaryTypeTraitExpr - A GCC or MS unary type trait, as used in the 1013/// implementation of TR1/C++0x type trait templates. 1014/// Example: 1015/// __is_pod(int) == true 1016/// __is_enum(std::string) == false 1017class UnaryTypeTraitExpr : public Expr { 1018 /// UTT - The trait. 1019 UnaryTypeTrait UTT; 1020 1021 /// Loc - The location of the type trait keyword. 1022 SourceLocation Loc; 1023 1024 /// RParen - The location of the closing paren. 1025 SourceLocation RParen; 1026 1027 /// QueriedType - The type we're testing. 1028 QualType QueriedType; 1029 1030public: 1031 UnaryTypeTraitExpr(SourceLocation loc, UnaryTypeTrait utt, QualType queried, 1032 SourceLocation rparen, QualType ty) 1033 : Expr(UnaryTypeTraitExprClass, ty, false, queried->isDependentType()), 1034 UTT(utt), Loc(loc), RParen(rparen), QueriedType(queried) { } 1035 1036 virtual SourceRange getSourceRange() const { return SourceRange(Loc, RParen);} 1037 1038 UnaryTypeTrait getTrait() const { return UTT; } 1039 1040 QualType getQueriedType() const { return QueriedType; } 1041 1042 bool EvaluateTrait(ASTContext&) const; 1043 1044 static bool classof(const Stmt *T) { 1045 return T->getStmtClass() == UnaryTypeTraitExprClass; 1046 } 1047 static bool classof(const UnaryTypeTraitExpr *) { return true; } 1048 1049 // Iterators 1050 virtual child_iterator child_begin(); 1051 virtual child_iterator child_end(); 1052}; 1053 1054/// QualifiedDeclRefExpr - A reference to a declared variable, 1055/// function, enum, etc., that includes a qualification, e.g., 1056/// "N::foo". 1057class QualifiedDeclRefExpr : public DeclRefExpr { 1058 /// QualifierRange - The source range that covers the 1059 /// nested-name-specifier. 1060 SourceRange QualifierRange; 1061 1062 /// \brief The nested-name-specifier that qualifies this declaration 1063 /// name. 1064 NestedNameSpecifier *NNS; 1065 1066public: 1067 QualifiedDeclRefExpr(NamedDecl *d, QualType t, SourceLocation l, bool TD, 1068 bool VD, SourceRange R, NestedNameSpecifier *NNS) 1069 : DeclRefExpr(QualifiedDeclRefExprClass, d, t, l, TD, VD), 1070 QualifierRange(R), NNS(NNS) { } 1071 1072 /// \brief Retrieve the source range of the nested-name-specifier. 1073 SourceRange getQualifierRange() const { return QualifierRange; } 1074 1075 /// \brief Retrieve the nested-name-specifier that qualifies this 1076 /// declaration. 1077 NestedNameSpecifier *getQualifier() const { return NNS; } 1078 1079 virtual SourceRange getSourceRange() const { 1080 return SourceRange(QualifierRange.getBegin(), getLocation()); 1081 } 1082 1083 static bool classof(const Stmt *T) { 1084 return T->getStmtClass() == QualifiedDeclRefExprClass; 1085 } 1086 static bool classof(const QualifiedDeclRefExpr *) { return true; } 1087}; 1088 1089/// \brief A qualified reference to a name whose declaration cannot 1090/// yet be resolved. 1091/// 1092/// UnresolvedDeclRefExpr is similar to QualifiedDeclRefExpr in that 1093/// it expresses a qualified reference to a declaration such as 1094/// X<T>::value. The difference, however, is that an 1095/// UnresolvedDeclRefExpr node is used only within C++ templates when 1096/// the qualification (e.g., X<T>::) refers to a dependent type. In 1097/// this case, X<T>::value cannot resolve to a declaration because the 1098/// declaration will differ from on instantiation of X<T> to the 1099/// next. Therefore, UnresolvedDeclRefExpr keeps track of the 1100/// qualifier (X<T>::) and the name of the entity being referenced 1101/// ("value"). Such expressions will instantiate to 1102/// QualifiedDeclRefExprs. 1103class UnresolvedDeclRefExpr : public Expr { 1104 /// The name of the entity we will be referencing. 1105 DeclarationName Name; 1106 1107 /// Location of the name of the declaration we're referencing. 1108 SourceLocation Loc; 1109 1110 /// QualifierRange - The source range that covers the 1111 /// nested-name-specifier. 1112 SourceRange QualifierRange; 1113 1114 /// \brief The nested-name-specifier that qualifies this unresolved 1115 /// declaration name. 1116 NestedNameSpecifier *NNS; 1117 1118 /// \brief Whether this expr is an address of (&) operand. 1119 bool IsAddressOfOperand; 1120 1121public: 1122 UnresolvedDeclRefExpr(DeclarationName N, QualType T, SourceLocation L, 1123 SourceRange R, NestedNameSpecifier *NNS, 1124 bool IsAddressOfOperand) 1125 : Expr(UnresolvedDeclRefExprClass, T, true, true), 1126 Name(N), Loc(L), QualifierRange(R), NNS(NNS), 1127 IsAddressOfOperand(IsAddressOfOperand) { } 1128 1129 /// \brief Retrieve the name that this expression refers to. 1130 DeclarationName getDeclName() const { return Name; } 1131 1132 /// \brief Retrieve the location of the name within the expression. 1133 SourceLocation getLocation() const { return Loc; } 1134 1135 /// \brief Retrieve the source range of the nested-name-specifier. 1136 SourceRange getQualifierRange() const { return QualifierRange; } 1137 1138 /// \brief Retrieve the nested-name-specifier that qualifies this 1139 /// declaration. 1140 NestedNameSpecifier *getQualifier() const { return NNS; } 1141 1142 /// \brief Retrieve whether this is an address of (&) operand. 1143 1144 bool isAddressOfOperand() const { return IsAddressOfOperand; } 1145 virtual SourceRange getSourceRange() const { 1146 return SourceRange(QualifierRange.getBegin(), getLocation()); 1147 } 1148 1149 static bool classof(const Stmt *T) { 1150 return T->getStmtClass() == UnresolvedDeclRefExprClass; 1151 } 1152 static bool classof(const UnresolvedDeclRefExpr *) { return true; } 1153 1154 virtual StmtIterator child_begin(); 1155 virtual StmtIterator child_end(); 1156}; 1157 1158/// \brief An expression that refers to a C++ template-id, such as 1159/// @c isa<FunctionDecl>. 1160class TemplateIdRefExpr : public Expr { 1161 /// \brief If this template-id was qualified-id, e.g., @c std::sort<int>, 1162 /// this nested name specifier contains the @c std::. 1163 NestedNameSpecifier *Qualifier; 1164 1165 /// \brief If this template-id was a qualified-id, e.g., @c std::sort<int>, 1166 /// this covers the source code range of the @c std::. 1167 SourceRange QualifierRange; 1168 1169 /// \brief The actual template to which this template-id refers. 1170 TemplateName Template; 1171 1172 /// \brief The source location of the template name. 1173 SourceLocation TemplateNameLoc; 1174 1175 /// \brief The source location of the left angle bracket ('<'); 1176 SourceLocation LAngleLoc; 1177 1178 /// \brief The source location of the right angle bracket ('>'); 1179 SourceLocation RAngleLoc; 1180 1181 /// \brief The number of template arguments in TemplateArgs. 1182 unsigned NumTemplateArgs; 1183 1184 TemplateIdRefExpr(QualType T, 1185 NestedNameSpecifier *Qualifier, SourceRange QualifierRange, 1186 TemplateName Template, SourceLocation TemplateNameLoc, 1187 SourceLocation LAngleLoc, 1188 const TemplateArgument *TemplateArgs, 1189 unsigned NumTemplateArgs, 1190 SourceLocation RAngleLoc); 1191 1192 virtual void DoDestroy(ASTContext &Context); 1193 1194public: 1195 static TemplateIdRefExpr * 1196 Create(ASTContext &Context, QualType T, 1197 NestedNameSpecifier *Qualifier, SourceRange QualifierRange, 1198 TemplateName Template, SourceLocation TemplateNameLoc, 1199 SourceLocation LAngleLoc, const TemplateArgument *TemplateArgs, 1200 unsigned NumTemplateArgs, SourceLocation RAngleLoc); 1201 1202 /// \brief Retrieve the nested name specifier used to qualify the name of 1203 /// this template-id, e.g., the "std::sort" in @c std::sort<int>, or NULL 1204 /// if this template-id was an unqualified-id. 1205 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1206 1207 /// \brief Retrieve the source range describing the nested name specifier 1208 /// used to qualified the name of this template-id, if the name was qualified. 1209 SourceRange getQualifierRange() const { return QualifierRange; } 1210 1211 /// \brief Retrieve the name of the template referenced, e.g., "sort" in 1212 /// @c std::sort<int>; 1213 TemplateName getTemplateName() const { return Template; } 1214 1215 /// \brief Retrieve the location of the name of the template referenced, e.g., 1216 /// the location of "sort" in @c std::sort<int>. 1217 SourceLocation getTemplateNameLoc() const { return TemplateNameLoc; } 1218 1219 /// \brief Retrieve the location of the left angle bracket following the 1220 /// template name ('<'). 1221 SourceLocation getLAngleLoc() const { return LAngleLoc; } 1222 1223 /// \brief Retrieve the template arguments provided as part of this 1224 /// template-id. 1225 const TemplateArgument *getTemplateArgs() const { 1226 return reinterpret_cast<const TemplateArgument *>(this + 1); 1227 } 1228 1229 /// \brief Retrieve the number of template arguments provided as part of this 1230 /// template-id. 1231 unsigned getNumTemplateArgs() const { return NumTemplateArgs; } 1232 1233 /// \brief Retrieve the location of the right angle bracket following the 1234 /// template arguments ('>'). 1235 SourceLocation getRAngleLoc() const { return RAngleLoc; } 1236 1237 virtual SourceRange getSourceRange() const { 1238 return SourceRange(Qualifier? QualifierRange.getBegin() : TemplateNameLoc, 1239 RAngleLoc); 1240 } 1241 1242 // Iterators 1243 virtual child_iterator child_begin(); 1244 virtual child_iterator child_end(); 1245 1246 static bool classof(const Stmt *T) { 1247 return T->getStmtClass() == TemplateIdRefExprClass; 1248 } 1249 static bool classof(const TemplateIdRefExpr *) { return true; } 1250}; 1251 1252class CXXExprWithTemporaries : public Expr { 1253 Stmt *SubExpr; 1254 1255 CXXTemporary **Temps; 1256 unsigned NumTemps; 1257 1258 bool ShouldDestroyTemps; 1259 1260 CXXExprWithTemporaries(Expr *SubExpr, CXXTemporary **Temps, 1261 unsigned NumTemps, bool ShouldDestroyTemps); 1262 ~CXXExprWithTemporaries(); 1263 1264protected: 1265 virtual void DoDestroy(ASTContext &C); 1266 1267public: 1268 static CXXExprWithTemporaries *Create(ASTContext &C, Expr *SubExpr, 1269 CXXTemporary **Temps, unsigned NumTemps, 1270 bool ShouldDestroyTemporaries); 1271 1272 unsigned getNumTemporaries() const { return NumTemps; } 1273 CXXTemporary *getTemporary(unsigned i) { 1274 assert(i < NumTemps && "Index out of range"); 1275 return Temps[i]; 1276 } 1277 const CXXTemporary *getTemporary(unsigned i) const { 1278 assert(i < NumTemps && "Index out of range"); 1279 return Temps[i]; 1280 } 1281 1282 bool shouldDestroyTemporaries() const { return ShouldDestroyTemps; } 1283 1284 void removeLastTemporary() { NumTemps--; } 1285 1286 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 1287 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 1288 void setSubExpr(Expr *E) { SubExpr = E; } 1289 1290 virtual SourceRange getSourceRange() const { return SourceRange(); } 1291 1292 // Implement isa/cast/dyncast/etc. 1293 static bool classof(const Stmt *T) { 1294 return T->getStmtClass() == CXXExprWithTemporariesClass; 1295 } 1296 static bool classof(const CXXExprWithTemporaries *) { return true; } 1297 1298 // Iterators 1299 virtual child_iterator child_begin(); 1300 virtual child_iterator child_end(); 1301}; 1302 1303/// \brief Describes an explicit type conversion that uses functional 1304/// notion but could not be resolved because one or more arguments are 1305/// type-dependent. 1306/// 1307/// The explicit type conversions expressed by 1308/// CXXUnresolvedConstructExpr have the form \c T(a1, a2, ..., aN), 1309/// where \c T is some type and \c a1, a2, ..., aN are values, and 1310/// either \C T is a dependent type or one or more of the \c a's is 1311/// type-dependent. For example, this would occur in a template such 1312/// as: 1313/// 1314/// \code 1315/// template<typename T, typename A1> 1316/// inline T make_a(const A1& a1) { 1317/// return T(a1); 1318/// } 1319/// \endcode 1320/// 1321/// When the returned expression is instantiated, it may resolve to a 1322/// constructor call, conversion function call, or some kind of type 1323/// conversion. 1324class CXXUnresolvedConstructExpr : public Expr { 1325 /// \brief The starting location of the type 1326 SourceLocation TyBeginLoc; 1327 1328 /// \brief The type being constructed. 1329 QualType Type; 1330 1331 /// \brief The location of the left parentheses ('('). 1332 SourceLocation LParenLoc; 1333 1334 /// \brief The location of the right parentheses (')'). 1335 SourceLocation RParenLoc; 1336 1337 /// \brief The number of arguments used to construct the type. 1338 unsigned NumArgs; 1339 1340 CXXUnresolvedConstructExpr(SourceLocation TyBegin, 1341 QualType T, 1342 SourceLocation LParenLoc, 1343 Expr **Args, 1344 unsigned NumArgs, 1345 SourceLocation RParenLoc); 1346 1347public: 1348 static CXXUnresolvedConstructExpr *Create(ASTContext &C, 1349 SourceLocation TyBegin, 1350 QualType T, 1351 SourceLocation LParenLoc, 1352 Expr **Args, 1353 unsigned NumArgs, 1354 SourceLocation RParenLoc); 1355 1356 /// \brief Retrieve the source location where the type begins. 1357 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 1358 void setTypeBeginLoc(SourceLocation L) { TyBeginLoc = L; } 1359 1360 /// \brief Retrieve the type that is being constructed, as specified 1361 /// in the source code. 1362 QualType getTypeAsWritten() const { return Type; } 1363 void setTypeAsWritten(QualType T) { Type = T; } 1364 1365 /// \brief Retrieve the location of the left parentheses ('(') that 1366 /// precedes the argument list. 1367 SourceLocation getLParenLoc() const { return LParenLoc; } 1368 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 1369 1370 /// \brief Retrieve the location of the right parentheses (')') that 1371 /// follows the argument list. 1372 SourceLocation getRParenLoc() const { return RParenLoc; } 1373 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1374 1375 /// \brief Retrieve the number of arguments. 1376 unsigned arg_size() const { return NumArgs; } 1377 1378 typedef Expr** arg_iterator; 1379 arg_iterator arg_begin() { return reinterpret_cast<Expr**>(this + 1); } 1380 arg_iterator arg_end() { return arg_begin() + NumArgs; } 1381 1382 Expr *getArg(unsigned I) { 1383 assert(I < NumArgs && "Argument index out-of-range"); 1384 return *(arg_begin() + I); 1385 } 1386 1387 virtual SourceRange getSourceRange() const { 1388 return SourceRange(TyBeginLoc, RParenLoc); 1389 } 1390 static bool classof(const Stmt *T) { 1391 return T->getStmtClass() == CXXUnresolvedConstructExprClass; 1392 } 1393 static bool classof(const CXXUnresolvedConstructExpr *) { return true; } 1394 1395 // Iterators 1396 virtual child_iterator child_begin(); 1397 virtual child_iterator child_end(); 1398}; 1399 1400/// \brief Represents a C++ member access expression where the actual member 1401/// referenced could not be resolved, e.g., because the base expression or the 1402/// member name was dependent. 1403class CXXUnresolvedMemberExpr : public Expr { 1404 /// \brief The expression for the base pointer or class reference, 1405 /// e.g., the \c x in x.f. 1406 Stmt *Base; 1407 1408 /// \brief Whether this member expression used the '->' operator or 1409 /// the '.' operator. 1410 bool IsArrow; 1411 1412 /// \brief The location of the '->' or '.' operator. 1413 SourceLocation OperatorLoc; 1414 1415 /// \brief The nested-name-specifier that precedes the member name, if any. 1416 NestedNameSpecifier *Qualifier; 1417 1418 /// \brief The source range covering the nested name specifier. 1419 SourceRange QualifierRange; 1420 1421 /// \brief In a qualified member access expression such as t->Base::f, this 1422 /// member stores the resolves of name lookup in the context of the member 1423 /// access expression, to be used at instantiation time. 1424 /// 1425 /// FIXME: This member, along with the Qualifier and QualifierRange, could 1426 /// be stuck into a structure that is optionally allocated at the end of 1427 /// the CXXUnresolvedMemberExpr, to save space in the common case. 1428 NamedDecl *FirstQualifierFoundInScope; 1429 1430 /// \brief The member to which this member expression refers, which 1431 /// can be name, overloaded operator, or destructor. 1432 /// FIXME: could also be a template-id 1433 DeclarationName Member; 1434 1435 /// \brief The location of the member name. 1436 SourceLocation MemberLoc; 1437 1438public: 1439 CXXUnresolvedMemberExpr(ASTContext &C, 1440 Expr *Base, bool IsArrow, 1441 SourceLocation OperatorLoc, 1442 NestedNameSpecifier *Qualifier, 1443 SourceRange QualifierRange, 1444 NamedDecl *FirstQualifierFoundInScope, 1445 DeclarationName Member, 1446 SourceLocation MemberLoc) 1447 : Expr(CXXUnresolvedMemberExprClass, C.DependentTy, true, true), 1448 Base(Base), IsArrow(IsArrow), OperatorLoc(OperatorLoc), 1449 Qualifier(Qualifier), QualifierRange(QualifierRange), 1450 FirstQualifierFoundInScope(FirstQualifierFoundInScope), 1451 Member(Member), MemberLoc(MemberLoc) { } 1452 1453 /// \brief Retrieve the base object of this member expressions, 1454 /// e.g., the \c x in \c x.m. 1455 Expr *getBase() { return cast<Expr>(Base); } 1456 void setBase(Expr *E) { Base = E; } 1457 1458 /// \brief Determine whether this member expression used the '->' 1459 /// operator; otherwise, it used the '.' operator. 1460 bool isArrow() const { return IsArrow; } 1461 void setArrow(bool A) { IsArrow = A; } 1462 1463 /// \brief Retrieve the location of the '->' or '.' operator. 1464 SourceLocation getOperatorLoc() const { return OperatorLoc; } 1465 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 1466 1467 /// \brief Retrieve the nested-name-specifier that qualifies the member 1468 /// name. 1469 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1470 1471 /// \brief Retrieve the source range covering the nested-name-specifier 1472 /// that qualifies the member name. 1473 SourceRange getQualifierRange() const { return QualifierRange; } 1474 1475 /// \brief Retrieve the first part of the nested-name-specifier that was 1476 /// found in the scope of the member access expression when the member access 1477 /// was initially parsed. 1478 /// 1479 /// This function only returns a useful result when member access expression 1480 /// uses a qualified member name, e.g., "x.Base::f". Here, the declaration 1481 /// returned by this function describes what was found by unqualified name 1482 /// lookup for the identifier "Base" within the scope of the member access 1483 /// expression itself. At template instantiation time, this information is 1484 /// combined with the results of name lookup into the type of the object 1485 /// expression itself (the class type of x). 1486 NamedDecl *getFirstQualifierFoundInScope() const { 1487 return FirstQualifierFoundInScope; 1488 } 1489 1490 /// \brief Retrieve the name of the member that this expression 1491 /// refers to. 1492 DeclarationName getMember() const { return Member; } 1493 void setMember(DeclarationName N) { Member = N; } 1494 1495 // \brief Retrieve the location of the name of the member that this 1496 // expression refers to. 1497 SourceLocation getMemberLoc() const { return MemberLoc; } 1498 void setMemberLoc(SourceLocation L) { MemberLoc = L; } 1499 1500 virtual SourceRange getSourceRange() const { 1501 return SourceRange(Base->getSourceRange().getBegin(), 1502 MemberLoc); 1503 } 1504 static bool classof(const Stmt *T) { 1505 return T->getStmtClass() == CXXUnresolvedMemberExprClass; 1506 } 1507 static bool classof(const CXXUnresolvedMemberExpr *) { return true; } 1508 1509 // Iterators 1510 virtual child_iterator child_begin(); 1511 virtual child_iterator child_end(); 1512}; 1513 1514} // end namespace clang 1515 1516#endif 1517