ExprCXX.h revision a71d819bb8f50c28938db0f2867d3fb6e2ce5910
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 /// setArg - Set the specified argument. 521 void setArg(unsigned Arg, Expr *ArgExpr) { 522 assert(Arg < NumArgs && "Arg access out of range!"); 523 Args[Arg] = ArgExpr; 524 } 525 526 virtual SourceRange getSourceRange() const { return SourceRange(); } 527 528 static bool classof(const Stmt *T) { 529 return T->getStmtClass() == CXXConstructExprClass || 530 T->getStmtClass() == CXXTemporaryObjectExprClass; 531 } 532 static bool classof(const CXXConstructExpr *) { return true; } 533 534 // Iterators 535 virtual child_iterator child_begin(); 536 virtual child_iterator child_end(); 537}; 538 539/// CXXFunctionalCastExpr - Represents an explicit C++ type conversion 540/// that uses "functional" notion (C++ [expr.type.conv]). Example: @c 541/// x = int(0.5); 542class CXXFunctionalCastExpr : public ExplicitCastExpr { 543 CXXMethodDecl *TypeConversionMethod; 544 SourceLocation TyBeginLoc; 545 SourceLocation RParenLoc; 546public: 547 CXXFunctionalCastExpr(QualType ty, QualType writtenTy, 548 SourceLocation tyBeginLoc, CastKind kind, 549 Expr *castExpr, CXXMethodDecl *typeConversionMethod, 550 SourceLocation rParenLoc) : 551 ExplicitCastExpr(CXXFunctionalCastExprClass, ty, kind, castExpr, writtenTy), 552 TypeConversionMethod(typeConversionMethod), 553 TyBeginLoc(tyBeginLoc), RParenLoc(rParenLoc) {} 554 555 CXXMethodDecl *getTypeConversionMethod() const 556 { return TypeConversionMethod; } 557 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 558 SourceLocation getRParenLoc() const { return RParenLoc; } 559 560 virtual SourceRange getSourceRange() const { 561 return SourceRange(TyBeginLoc, RParenLoc); 562 } 563 static bool classof(const Stmt *T) { 564 return T->getStmtClass() == CXXFunctionalCastExprClass; 565 } 566 static bool classof(const CXXFunctionalCastExpr *) { return true; } 567}; 568 569/// @brief Represents a C++ functional cast expression that builds a 570/// temporary object. 571/// 572/// This expression type represents a C++ "functional" cast 573/// (C++[expr.type.conv]) with N != 1 arguments that invokes a 574/// constructor to build a temporary object. If N == 0 but no 575/// constructor will be called (because the functional cast is 576/// performing a value-initialized an object whose class type has no 577/// user-declared constructors), CXXZeroInitValueExpr will represent 578/// the functional cast. Finally, with N == 1 arguments the functional 579/// cast expression will be represented by CXXFunctionalCastExpr. 580/// Example: 581/// @code 582/// struct X { X(int, float); } 583/// 584/// X create_X() { 585/// return X(1, 3.14f); // creates a CXXTemporaryObjectExpr 586/// }; 587/// @endcode 588class CXXTemporaryObjectExpr : public CXXConstructExpr { 589 SourceLocation TyBeginLoc; 590 SourceLocation RParenLoc; 591 592public: 593 CXXTemporaryObjectExpr(ASTContext &C, CXXConstructorDecl *Cons, 594 QualType writtenTy, SourceLocation tyBeginLoc, 595 Expr **Args,unsigned NumArgs, 596 SourceLocation rParenLoc); 597 598 ~CXXTemporaryObjectExpr() { } 599 600 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 601 SourceLocation getRParenLoc() const { return RParenLoc; } 602 603 virtual SourceRange getSourceRange() const { 604 return SourceRange(TyBeginLoc, RParenLoc); 605 } 606 static bool classof(const Stmt *T) { 607 return T->getStmtClass() == CXXTemporaryObjectExprClass; 608 } 609 static bool classof(const CXXTemporaryObjectExpr *) { return true; } 610}; 611 612/// CXXZeroInitValueExpr - [C++ 5.2.3p2] 613/// Expression "T()" which creates a value-initialized rvalue of type 614/// T, which is either a non-class type or a class type without any 615/// user-defined constructors. 616/// 617class CXXZeroInitValueExpr : public Expr { 618 SourceLocation TyBeginLoc; 619 SourceLocation RParenLoc; 620 621public: 622 CXXZeroInitValueExpr(QualType ty, SourceLocation tyBeginLoc, 623 SourceLocation rParenLoc ) : 624 Expr(CXXZeroInitValueExprClass, ty, false, false), 625 TyBeginLoc(tyBeginLoc), RParenLoc(rParenLoc) {} 626 627 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 628 SourceLocation getRParenLoc() const { return RParenLoc; } 629 630 /// @brief Whether this initialization expression was 631 /// implicitly-generated. 632 bool isImplicit() const { 633 return TyBeginLoc.isInvalid() && RParenLoc.isInvalid(); 634 } 635 636 virtual SourceRange getSourceRange() const { 637 return SourceRange(TyBeginLoc, RParenLoc); 638 } 639 640 static bool classof(const Stmt *T) { 641 return T->getStmtClass() == CXXZeroInitValueExprClass; 642 } 643 static bool classof(const CXXZeroInitValueExpr *) { return true; } 644 645 // Iterators 646 virtual child_iterator child_begin(); 647 virtual child_iterator child_end(); 648}; 649 650/// CXXConditionDeclExpr - Condition declaration of a if/switch/while/for 651/// statement, e.g: "if (int x = f()) {...}". 652/// The main difference with DeclRefExpr is that CXXConditionDeclExpr owns the 653/// decl that it references. 654/// 655class CXXConditionDeclExpr : public DeclRefExpr { 656public: 657 CXXConditionDeclExpr(SourceLocation startLoc, 658 SourceLocation eqLoc, VarDecl *var) 659 : DeclRefExpr(CXXConditionDeclExprClass, var, 660 var->getType().getNonReferenceType(), startLoc, 661 var->getType()->isDependentType(), 662 /*FIXME:integral constant?*/ 663 var->getType()->isDependentType()) {} 664 665 SourceLocation getStartLoc() const { return getLocation(); } 666 667 VarDecl *getVarDecl() { return cast<VarDecl>(getDecl()); } 668 const VarDecl *getVarDecl() const { return cast<VarDecl>(getDecl()); } 669 670 virtual SourceRange getSourceRange() const { 671 return SourceRange(getStartLoc(), getVarDecl()->getInit()->getLocEnd()); 672 } 673 674 static bool classof(const Stmt *T) { 675 return T->getStmtClass() == CXXConditionDeclExprClass; 676 } 677 static bool classof(const CXXConditionDeclExpr *) { return true; } 678 679 // Iterators 680 virtual child_iterator child_begin(); 681 virtual child_iterator child_end(); 682}; 683 684/// CXXNewExpr - A new expression for memory allocation and constructor calls, 685/// e.g: "new CXXNewExpr(foo)". 686class CXXNewExpr : public Expr { 687 // Was the usage ::new, i.e. is the global new to be used? 688 bool GlobalNew : 1; 689 // Was the form (type-id) used? Otherwise, it was new-type-id. 690 bool ParenTypeId : 1; 691 // Is there an initializer? If not, built-ins are uninitialized, else they're 692 // value-initialized. 693 bool Initializer : 1; 694 // Do we allocate an array? If so, the first SubExpr is the size expression. 695 bool Array : 1; 696 // The number of placement new arguments. 697 unsigned NumPlacementArgs : 14; 698 // The number of constructor arguments. This may be 1 even for non-class 699 // types; use the pseudo copy constructor. 700 unsigned NumConstructorArgs : 14; 701 // Contains an optional array size expression, any number of optional 702 // placement arguments, and any number of optional constructor arguments, 703 // in that order. 704 Stmt **SubExprs; 705 // Points to the allocation function used. 706 FunctionDecl *OperatorNew; 707 // Points to the deallocation function used in case of error. May be null. 708 FunctionDecl *OperatorDelete; 709 // Points to the constructor used. Cannot be null if AllocType is a record; 710 // it would still point at the default constructor (even an implicit one). 711 // Must be null for all other types. 712 CXXConstructorDecl *Constructor; 713 714 SourceLocation StartLoc; 715 SourceLocation EndLoc; 716 717public: 718 CXXNewExpr(bool globalNew, FunctionDecl *operatorNew, Expr **placementArgs, 719 unsigned numPlaceArgs, bool ParenTypeId, Expr *arraySize, 720 CXXConstructorDecl *constructor, bool initializer, 721 Expr **constructorArgs, unsigned numConsArgs, 722 FunctionDecl *operatorDelete, QualType ty, 723 SourceLocation startLoc, SourceLocation endLoc); 724 ~CXXNewExpr() { 725 delete[] SubExprs; 726 } 727 728 QualType getAllocatedType() const { 729 assert(getType()->isPointerType()); 730 return getType()->getAs<PointerType>()->getPointeeType(); 731 } 732 733 FunctionDecl *getOperatorNew() const { return OperatorNew; } 734 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 735 CXXConstructorDecl *getConstructor() const { return Constructor; } 736 737 bool isArray() const { return Array; } 738 Expr *getArraySize() { 739 return Array ? cast<Expr>(SubExprs[0]) : 0; 740 } 741 const Expr *getArraySize() const { 742 return Array ? cast<Expr>(SubExprs[0]) : 0; 743 } 744 745 unsigned getNumPlacementArgs() const { return NumPlacementArgs; } 746 Expr *getPlacementArg(unsigned i) { 747 assert(i < NumPlacementArgs && "Index out of range"); 748 return cast<Expr>(SubExprs[Array + i]); 749 } 750 const Expr *getPlacementArg(unsigned i) const { 751 assert(i < NumPlacementArgs && "Index out of range"); 752 return cast<Expr>(SubExprs[Array + i]); 753 } 754 755 bool isGlobalNew() const { return GlobalNew; } 756 bool isParenTypeId() const { return ParenTypeId; } 757 bool hasInitializer() const { return Initializer; } 758 759 unsigned getNumConstructorArgs() const { return NumConstructorArgs; } 760 Expr *getConstructorArg(unsigned i) { 761 assert(i < NumConstructorArgs && "Index out of range"); 762 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 763 } 764 const Expr *getConstructorArg(unsigned i) const { 765 assert(i < NumConstructorArgs && "Index out of range"); 766 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 767 } 768 769 typedef ExprIterator arg_iterator; 770 typedef ConstExprIterator const_arg_iterator; 771 772 arg_iterator placement_arg_begin() { 773 return SubExprs + Array; 774 } 775 arg_iterator placement_arg_end() { 776 return SubExprs + Array + getNumPlacementArgs(); 777 } 778 const_arg_iterator placement_arg_begin() const { 779 return SubExprs + Array; 780 } 781 const_arg_iterator placement_arg_end() const { 782 return SubExprs + Array + getNumPlacementArgs(); 783 } 784 785 arg_iterator constructor_arg_begin() { 786 return SubExprs + Array + getNumPlacementArgs(); 787 } 788 arg_iterator constructor_arg_end() { 789 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 790 } 791 const_arg_iterator constructor_arg_begin() const { 792 return SubExprs + Array + getNumPlacementArgs(); 793 } 794 const_arg_iterator constructor_arg_end() const { 795 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 796 } 797 798 virtual SourceRange getSourceRange() const { 799 return SourceRange(StartLoc, EndLoc); 800 } 801 802 static bool classof(const Stmt *T) { 803 return T->getStmtClass() == CXXNewExprClass; 804 } 805 static bool classof(const CXXNewExpr *) { return true; } 806 807 // Iterators 808 virtual child_iterator child_begin(); 809 virtual child_iterator child_end(); 810}; 811 812/// CXXDeleteExpr - A delete expression for memory deallocation and destructor 813/// calls, e.g. "delete[] pArray". 814class CXXDeleteExpr : public Expr { 815 // Is this a forced global delete, i.e. "::delete"? 816 bool GlobalDelete : 1; 817 // Is this the array form of delete, i.e. "delete[]"? 818 bool ArrayForm : 1; 819 // Points to the operator delete overload that is used. Could be a member. 820 FunctionDecl *OperatorDelete; 821 // The pointer expression to be deleted. 822 Stmt *Argument; 823 // Location of the expression. 824 SourceLocation Loc; 825public: 826 CXXDeleteExpr(QualType ty, bool globalDelete, bool arrayForm, 827 FunctionDecl *operatorDelete, Expr *arg, SourceLocation loc) 828 : Expr(CXXDeleteExprClass, ty, false, false), GlobalDelete(globalDelete), 829 ArrayForm(arrayForm), OperatorDelete(operatorDelete), Argument(arg), 830 Loc(loc) { } 831 832 bool isGlobalDelete() const { return GlobalDelete; } 833 bool isArrayForm() const { return ArrayForm; } 834 835 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 836 837 Expr *getArgument() { return cast<Expr>(Argument); } 838 const Expr *getArgument() const { return cast<Expr>(Argument); } 839 840 virtual SourceRange getSourceRange() const { 841 return SourceRange(Loc, Argument->getLocEnd()); 842 } 843 844 static bool classof(const Stmt *T) { 845 return T->getStmtClass() == CXXDeleteExprClass; 846 } 847 static bool classof(const CXXDeleteExpr *) { return true; } 848 849 // Iterators 850 virtual child_iterator child_begin(); 851 virtual child_iterator child_end(); 852}; 853 854/// \brief Represents a C++ pseudo-destructor (C++ [expr.pseudo]). 855/// 856/// Example: 857/// 858/// \code 859/// template<typename T> 860/// void destroy(T* ptr) { 861/// ptr->~T(); 862/// } 863/// \endcode 864/// 865/// When the template is parsed, the expression \c ptr->~T will be stored as 866/// a member reference expression. If it then instantiated with a scalar type 867/// as a template argument for T, the resulting expression will be a 868/// pseudo-destructor expression. 869class CXXPseudoDestructorExpr : public Expr { 870 /// \brief The base expression (that is being destroyed). 871 Stmt *Base; 872 873 /// \brief Whether the operator was an arrow ('->'); otherwise, it was a 874 /// period ('.'). 875 bool IsArrow : 1; 876 877 /// \brief The location of the '.' or '->' operator. 878 SourceLocation OperatorLoc; 879 880 /// \brief The nested-name-specifier that follows the operator, if present. 881 NestedNameSpecifier *Qualifier; 882 883 /// \brief The source range that covers the nested-name-specifier, if 884 /// present. 885 SourceRange QualifierRange; 886 887 /// \brief The type being destroyed. 888 QualType DestroyedType; 889 890 /// \brief The location of the type after the '~'. 891 SourceLocation DestroyedTypeLoc; 892 893public: 894 CXXPseudoDestructorExpr(ASTContext &Context, 895 Expr *Base, bool isArrow, SourceLocation OperatorLoc, 896 NestedNameSpecifier *Qualifier, 897 SourceRange QualifierRange, 898 QualType DestroyedType, 899 SourceLocation DestroyedTypeLoc) 900 : Expr(CXXPseudoDestructorExprClass, 901 Context.getPointerType(Context.getFunctionType(Context.VoidTy, 0, 0, 902 false, 0)), 903 /*isTypeDependent=*/false, 904 /*isValueDependent=*/Base->isValueDependent()), 905 Base(static_cast<Stmt *>(Base)), IsArrow(isArrow), 906 OperatorLoc(OperatorLoc), Qualifier(Qualifier), 907 QualifierRange(QualifierRange), DestroyedType(DestroyedType), 908 DestroyedTypeLoc(DestroyedTypeLoc) { } 909 910 void setBase(Expr *E) { Base = E; } 911 Expr *getBase() const { return cast<Expr>(Base); } 912 913 /// \brief Determines whether this member expression actually had 914 /// a C++ nested-name-specifier prior to the name of the member, e.g., 915 /// x->Base::foo. 916 bool hasQualifier() const { return Qualifier != 0; } 917 918 /// \brief If the member name was qualified, retrieves the source range of 919 /// the nested-name-specifier that precedes the member name. Otherwise, 920 /// returns an empty source range. 921 SourceRange getQualifierRange() const { return QualifierRange; } 922 923 /// \brief If the member name was qualified, retrieves the 924 /// nested-name-specifier that precedes the member name. Otherwise, returns 925 /// NULL. 926 NestedNameSpecifier *getQualifier() const { return Qualifier; } 927 928 /// \brief Determine whether this pseudo-destructor expression was written 929 /// using an '->' (otherwise, it used a '.'). 930 bool isArrow() const { return IsArrow; } 931 void setArrow(bool A) { IsArrow = A; } 932 933 /// \brief Retrieve the location of the '.' or '->' operator. 934 SourceLocation getOperatorLoc() const { return OperatorLoc; } 935 936 /// \brief Retrieve the type that is being destroyed. 937 QualType getDestroyedType() const { return DestroyedType; } 938 939 /// \brief Retrieve the location of the type being destroyed. 940 SourceLocation getDestroyedTypeLoc() const { return DestroyedTypeLoc; } 941 942 virtual SourceRange getSourceRange() const { 943 return SourceRange(Base->getLocStart(), DestroyedTypeLoc); 944 } 945 946 static bool classof(const Stmt *T) { 947 return T->getStmtClass() == CXXPseudoDestructorExprClass; 948 } 949 static bool classof(const CXXPseudoDestructorExpr *) { return true; } 950 951 // Iterators 952 virtual child_iterator child_begin(); 953 virtual child_iterator child_end(); 954}; 955 956/// \brief Represents the name of a function that has not been 957/// resolved to any declaration. 958/// 959/// Unresolved function names occur when a function name is 960/// encountered prior to an open parentheses ('(') in a C++ function 961/// call, and the function name itself did not resolve to a 962/// declaration. These function names can only be resolved when they 963/// form the postfix-expression of a function call, so that 964/// argument-dependent lookup finds declarations corresponding to 965/// these functions. 966 967/// @code 968/// template<typename T> void f(T x) { 969/// g(x); // g is an unresolved function name (that is also a dependent name) 970/// } 971/// @endcode 972class UnresolvedFunctionNameExpr : public Expr { 973 /// The name that was present in the source 974 DeclarationName Name; 975 976 /// The location of this name in the source code 977 SourceLocation Loc; 978 979public: 980 UnresolvedFunctionNameExpr(DeclarationName N, QualType T, SourceLocation L) 981 : Expr(UnresolvedFunctionNameExprClass, T, false, false), Name(N), Loc(L) { } 982 983 /// \brief Retrieves the name that occurred in the source code. 984 DeclarationName getName() const { return Name; } 985 986 /// getLocation - Retrieves the location in the source code where 987 /// the name occurred. 988 SourceLocation getLocation() const { return Loc; } 989 990 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 991 992 static bool classof(const Stmt *T) { 993 return T->getStmtClass() == UnresolvedFunctionNameExprClass; 994 } 995 static bool classof(const UnresolvedFunctionNameExpr *) { return true; } 996 997 // Iterators 998 virtual child_iterator child_begin(); 999 virtual child_iterator child_end(); 1000}; 1001 1002/// UnaryTypeTraitExpr - A GCC or MS unary type trait, as used in the 1003/// implementation of TR1/C++0x type trait templates. 1004/// Example: 1005/// __is_pod(int) == true 1006/// __is_enum(std::string) == false 1007class UnaryTypeTraitExpr : public Expr { 1008 /// UTT - The trait. 1009 UnaryTypeTrait UTT; 1010 1011 /// Loc - The location of the type trait keyword. 1012 SourceLocation Loc; 1013 1014 /// RParen - The location of the closing paren. 1015 SourceLocation RParen; 1016 1017 /// QueriedType - The type we're testing. 1018 QualType QueriedType; 1019 1020public: 1021 UnaryTypeTraitExpr(SourceLocation loc, UnaryTypeTrait utt, QualType queried, 1022 SourceLocation rparen, QualType ty) 1023 : Expr(UnaryTypeTraitExprClass, ty, false, queried->isDependentType()), 1024 UTT(utt), Loc(loc), RParen(rparen), QueriedType(queried) { } 1025 1026 virtual SourceRange getSourceRange() const { return SourceRange(Loc, RParen);} 1027 1028 UnaryTypeTrait getTrait() const { return UTT; } 1029 1030 QualType getQueriedType() const { return QueriedType; } 1031 1032 bool EvaluateTrait(ASTContext&) const; 1033 1034 static bool classof(const Stmt *T) { 1035 return T->getStmtClass() == UnaryTypeTraitExprClass; 1036 } 1037 static bool classof(const UnaryTypeTraitExpr *) { return true; } 1038 1039 // Iterators 1040 virtual child_iterator child_begin(); 1041 virtual child_iterator child_end(); 1042}; 1043 1044/// QualifiedDeclRefExpr - A reference to a declared variable, 1045/// function, enum, etc., that includes a qualification, e.g., 1046/// "N::foo". 1047class QualifiedDeclRefExpr : public DeclRefExpr { 1048 /// QualifierRange - The source range that covers the 1049 /// nested-name-specifier. 1050 SourceRange QualifierRange; 1051 1052 /// \brief The nested-name-specifier that qualifies this declaration 1053 /// name. 1054 NestedNameSpecifier *NNS; 1055 1056public: 1057 QualifiedDeclRefExpr(NamedDecl *d, QualType t, SourceLocation l, bool TD, 1058 bool VD, SourceRange R, NestedNameSpecifier *NNS) 1059 : DeclRefExpr(QualifiedDeclRefExprClass, d, t, l, TD, VD), 1060 QualifierRange(R), NNS(NNS) { } 1061 1062 /// \brief Retrieve the source range of the nested-name-specifier. 1063 SourceRange getQualifierRange() const { return QualifierRange; } 1064 1065 /// \brief Retrieve the nested-name-specifier that qualifies this 1066 /// declaration. 1067 NestedNameSpecifier *getQualifier() const { return NNS; } 1068 1069 virtual SourceRange getSourceRange() const { 1070 return SourceRange(QualifierRange.getBegin(), getLocation()); 1071 } 1072 1073 static bool classof(const Stmt *T) { 1074 return T->getStmtClass() == QualifiedDeclRefExprClass; 1075 } 1076 static bool classof(const QualifiedDeclRefExpr *) { return true; } 1077}; 1078 1079/// \brief A qualified reference to a name whose declaration cannot 1080/// yet be resolved. 1081/// 1082/// UnresolvedDeclRefExpr is similar to QualifiedDeclRefExpr in that 1083/// it expresses a qualified reference to a declaration such as 1084/// X<T>::value. The difference, however, is that an 1085/// UnresolvedDeclRefExpr node is used only within C++ templates when 1086/// the qualification (e.g., X<T>::) refers to a dependent type. In 1087/// this case, X<T>::value cannot resolve to a declaration because the 1088/// declaration will differ from on instantiation of X<T> to the 1089/// next. Therefore, UnresolvedDeclRefExpr keeps track of the 1090/// qualifier (X<T>::) and the name of the entity being referenced 1091/// ("value"). Such expressions will instantiate to 1092/// QualifiedDeclRefExprs. 1093class UnresolvedDeclRefExpr : public Expr { 1094 /// The name of the entity we will be referencing. 1095 DeclarationName Name; 1096 1097 /// Location of the name of the declaration we're referencing. 1098 SourceLocation Loc; 1099 1100 /// QualifierRange - The source range that covers the 1101 /// nested-name-specifier. 1102 SourceRange QualifierRange; 1103 1104 /// \brief The nested-name-specifier that qualifies this unresolved 1105 /// declaration name. 1106 NestedNameSpecifier *NNS; 1107 1108 /// \brief Whether this expr is an address of (&) operand. 1109 bool IsAddressOfOperand; 1110 1111public: 1112 UnresolvedDeclRefExpr(DeclarationName N, QualType T, SourceLocation L, 1113 SourceRange R, NestedNameSpecifier *NNS, 1114 bool IsAddressOfOperand) 1115 : Expr(UnresolvedDeclRefExprClass, T, true, true), 1116 Name(N), Loc(L), QualifierRange(R), NNS(NNS), 1117 IsAddressOfOperand(IsAddressOfOperand) { } 1118 1119 /// \brief Retrieve the name that this expression refers to. 1120 DeclarationName getDeclName() const { return Name; } 1121 1122 /// \brief Retrieve the location of the name within the expression. 1123 SourceLocation getLocation() const { return Loc; } 1124 1125 /// \brief Retrieve the source range of the nested-name-specifier. 1126 SourceRange getQualifierRange() const { return QualifierRange; } 1127 1128 /// \brief Retrieve the nested-name-specifier that qualifies this 1129 /// declaration. 1130 NestedNameSpecifier *getQualifier() const { return NNS; } 1131 1132 /// \brief Retrieve whether this is an address of (&) operand. 1133 1134 bool isAddressOfOperand() const { return IsAddressOfOperand; } 1135 virtual SourceRange getSourceRange() const { 1136 return SourceRange(QualifierRange.getBegin(), getLocation()); 1137 } 1138 1139 static bool classof(const Stmt *T) { 1140 return T->getStmtClass() == UnresolvedDeclRefExprClass; 1141 } 1142 static bool classof(const UnresolvedDeclRefExpr *) { return true; } 1143 1144 virtual StmtIterator child_begin(); 1145 virtual StmtIterator child_end(); 1146}; 1147 1148/// \brief An expression that refers to a C++ template-id, such as 1149/// @c isa<FunctionDecl>. 1150class TemplateIdRefExpr : public Expr { 1151 /// \brief If this template-id was qualified-id, e.g., @c std::sort<int>, 1152 /// this nested name specifier contains the @c std::. 1153 NestedNameSpecifier *Qualifier; 1154 1155 /// \brief If this template-id was a qualified-id, e.g., @c std::sort<int>, 1156 /// this covers the source code range of the @c std::. 1157 SourceRange QualifierRange; 1158 1159 /// \brief The actual template to which this template-id refers. 1160 TemplateName Template; 1161 1162 /// \brief The source location of the template name. 1163 SourceLocation TemplateNameLoc; 1164 1165 /// \brief The source location of the left angle bracket ('<'); 1166 SourceLocation LAngleLoc; 1167 1168 /// \brief The source location of the right angle bracket ('>'); 1169 SourceLocation RAngleLoc; 1170 1171 /// \brief The number of template arguments in TemplateArgs. 1172 unsigned NumTemplateArgs; 1173 1174 TemplateIdRefExpr(QualType T, 1175 NestedNameSpecifier *Qualifier, SourceRange QualifierRange, 1176 TemplateName Template, SourceLocation TemplateNameLoc, 1177 SourceLocation LAngleLoc, 1178 const TemplateArgument *TemplateArgs, 1179 unsigned NumTemplateArgs, 1180 SourceLocation RAngleLoc); 1181 1182 virtual void DoDestroy(ASTContext &Context); 1183 1184public: 1185 static TemplateIdRefExpr * 1186 Create(ASTContext &Context, QualType T, 1187 NestedNameSpecifier *Qualifier, SourceRange QualifierRange, 1188 TemplateName Template, SourceLocation TemplateNameLoc, 1189 SourceLocation LAngleLoc, const TemplateArgument *TemplateArgs, 1190 unsigned NumTemplateArgs, SourceLocation RAngleLoc); 1191 1192 /// \brief Retrieve the nested name specifier used to qualify the name of 1193 /// this template-id, e.g., the "std::sort" in @c std::sort<int>, or NULL 1194 /// if this template-id was an unqualified-id. 1195 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1196 1197 /// \brief Retrieve the source range describing the nested name specifier 1198 /// used to qualified the name of this template-id, if the name was qualified. 1199 SourceRange getQualifierRange() const { return QualifierRange; } 1200 1201 /// \brief Retrieve the name of the template referenced, e.g., "sort" in 1202 /// @c std::sort<int>; 1203 TemplateName getTemplateName() const { return Template; } 1204 1205 /// \brief Retrieve the location of the name of the template referenced, e.g., 1206 /// the location of "sort" in @c std::sort<int>. 1207 SourceLocation getTemplateNameLoc() const { return TemplateNameLoc; } 1208 1209 /// \brief Retrieve the location of the left angle bracket following the 1210 /// template name ('<'). 1211 SourceLocation getLAngleLoc() const { return LAngleLoc; } 1212 1213 /// \brief Retrieve the template arguments provided as part of this 1214 /// template-id. 1215 const TemplateArgument *getTemplateArgs() const { 1216 return reinterpret_cast<const TemplateArgument *>(this + 1); 1217 } 1218 1219 /// \brief Retrieve the number of template arguments provided as part of this 1220 /// template-id. 1221 unsigned getNumTemplateArgs() const { return NumTemplateArgs; } 1222 1223 /// \brief Retrieve the location of the right angle bracket following the 1224 /// template arguments ('>'). 1225 SourceLocation getRAngleLoc() const { return RAngleLoc; } 1226 1227 virtual SourceRange getSourceRange() const { 1228 return SourceRange(Qualifier? QualifierRange.getBegin() : TemplateNameLoc, 1229 RAngleLoc); 1230 } 1231 1232 // Iterators 1233 virtual child_iterator child_begin(); 1234 virtual child_iterator child_end(); 1235 1236 static bool classof(const Stmt *T) { 1237 return T->getStmtClass() == TemplateIdRefExprClass; 1238 } 1239 static bool classof(const TemplateIdRefExpr *) { return true; } 1240}; 1241 1242class CXXExprWithTemporaries : public Expr { 1243 Stmt *SubExpr; 1244 1245 CXXTemporary **Temps; 1246 unsigned NumTemps; 1247 1248 bool ShouldDestroyTemps; 1249 1250 CXXExprWithTemporaries(Expr *SubExpr, CXXTemporary **Temps, 1251 unsigned NumTemps, bool ShouldDestroyTemps); 1252 ~CXXExprWithTemporaries(); 1253 1254protected: 1255 virtual void DoDestroy(ASTContext &C); 1256 1257public: 1258 static CXXExprWithTemporaries *Create(ASTContext &C, Expr *SubExpr, 1259 CXXTemporary **Temps, unsigned NumTemps, 1260 bool ShouldDestroyTemporaries); 1261 1262 unsigned getNumTemporaries() const { return NumTemps; } 1263 CXXTemporary *getTemporary(unsigned i) { 1264 assert(i < NumTemps && "Index out of range"); 1265 return Temps[i]; 1266 } 1267 const CXXTemporary *getTemporary(unsigned i) const { 1268 assert(i < NumTemps && "Index out of range"); 1269 return Temps[i]; 1270 } 1271 1272 bool shouldDestroyTemporaries() const { return ShouldDestroyTemps; } 1273 1274 void removeLastTemporary() { NumTemps--; } 1275 1276 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 1277 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 1278 void setSubExpr(Expr *E) { SubExpr = E; } 1279 1280 virtual SourceRange getSourceRange() const { return SourceRange(); } 1281 1282 // Implement isa/cast/dyncast/etc. 1283 static bool classof(const Stmt *T) { 1284 return T->getStmtClass() == CXXExprWithTemporariesClass; 1285 } 1286 static bool classof(const CXXExprWithTemporaries *) { return true; } 1287 1288 // Iterators 1289 virtual child_iterator child_begin(); 1290 virtual child_iterator child_end(); 1291}; 1292 1293/// \brief Describes an explicit type conversion that uses functional 1294/// notion but could not be resolved because one or more arguments are 1295/// type-dependent. 1296/// 1297/// The explicit type conversions expressed by 1298/// CXXUnresolvedConstructExpr have the form \c T(a1, a2, ..., aN), 1299/// where \c T is some type and \c a1, a2, ..., aN are values, and 1300/// either \C T is a dependent type or one or more of the \c a's is 1301/// type-dependent. For example, this would occur in a template such 1302/// as: 1303/// 1304/// \code 1305/// template<typename T, typename A1> 1306/// inline T make_a(const A1& a1) { 1307/// return T(a1); 1308/// } 1309/// \endcode 1310/// 1311/// When the returned expression is instantiated, it may resolve to a 1312/// constructor call, conversion function call, or some kind of type 1313/// conversion. 1314class CXXUnresolvedConstructExpr : public Expr { 1315 /// \brief The starting location of the type 1316 SourceLocation TyBeginLoc; 1317 1318 /// \brief The type being constructed. 1319 QualType Type; 1320 1321 /// \brief The location of the left parentheses ('('). 1322 SourceLocation LParenLoc; 1323 1324 /// \brief The location of the right parentheses (')'). 1325 SourceLocation RParenLoc; 1326 1327 /// \brief The number of arguments used to construct the type. 1328 unsigned NumArgs; 1329 1330 CXXUnresolvedConstructExpr(SourceLocation TyBegin, 1331 QualType T, 1332 SourceLocation LParenLoc, 1333 Expr **Args, 1334 unsigned NumArgs, 1335 SourceLocation RParenLoc); 1336 1337public: 1338 static CXXUnresolvedConstructExpr *Create(ASTContext &C, 1339 SourceLocation TyBegin, 1340 QualType T, 1341 SourceLocation LParenLoc, 1342 Expr **Args, 1343 unsigned NumArgs, 1344 SourceLocation RParenLoc); 1345 1346 /// \brief Retrieve the source location where the type begins. 1347 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 1348 void setTypeBeginLoc(SourceLocation L) { TyBeginLoc = L; } 1349 1350 /// \brief Retrieve the type that is being constructed, as specified 1351 /// in the source code. 1352 QualType getTypeAsWritten() const { return Type; } 1353 void setTypeAsWritten(QualType T) { Type = T; } 1354 1355 /// \brief Retrieve the location of the left parentheses ('(') that 1356 /// precedes the argument list. 1357 SourceLocation getLParenLoc() const { return LParenLoc; } 1358 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 1359 1360 /// \brief Retrieve the location of the right parentheses (')') that 1361 /// follows the argument list. 1362 SourceLocation getRParenLoc() const { return RParenLoc; } 1363 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1364 1365 /// \brief Retrieve the number of arguments. 1366 unsigned arg_size() const { return NumArgs; } 1367 1368 typedef Expr** arg_iterator; 1369 arg_iterator arg_begin() { return reinterpret_cast<Expr**>(this + 1); } 1370 arg_iterator arg_end() { return arg_begin() + NumArgs; } 1371 1372 Expr *getArg(unsigned I) { 1373 assert(I < NumArgs && "Argument index out-of-range"); 1374 return *(arg_begin() + I); 1375 } 1376 1377 virtual SourceRange getSourceRange() const { 1378 return SourceRange(TyBeginLoc, RParenLoc); 1379 } 1380 static bool classof(const Stmt *T) { 1381 return T->getStmtClass() == CXXUnresolvedConstructExprClass; 1382 } 1383 static bool classof(const CXXUnresolvedConstructExpr *) { return true; } 1384 1385 // Iterators 1386 virtual child_iterator child_begin(); 1387 virtual child_iterator child_end(); 1388}; 1389 1390/// \brief Represents a C++ member access expression where the actual member 1391/// referenced could not be resolved, e.g., because the base expression or the 1392/// member name was dependent. 1393class CXXUnresolvedMemberExpr : public Expr { 1394 /// \brief The expression for the base pointer or class reference, 1395 /// e.g., the \c x in x.f. 1396 Stmt *Base; 1397 1398 /// \brief Whether this member expression used the '->' operator or 1399 /// the '.' operator. 1400 bool IsArrow; 1401 1402 /// \brief The location of the '->' or '.' operator. 1403 SourceLocation OperatorLoc; 1404 1405 /// \brief The nested-name-specifier that precedes the member name, if any. 1406 NestedNameSpecifier *Qualifier; 1407 1408 /// \brief The source range covering the nested name specifier. 1409 SourceRange QualifierRange; 1410 1411 /// \brief In a qualified member access expression such as t->Base::f, this 1412 /// member stores the resolves of name lookup in the context of the member 1413 /// access expression, to be used at instantiation time. 1414 /// 1415 /// FIXME: This member, along with the Qualifier and QualifierRange, could 1416 /// be stuck into a structure that is optionally allocated at the end of 1417 /// the CXXUnresolvedMemberExpr, to save space in the common case. 1418 NamedDecl *FirstQualifierFoundInScope; 1419 1420 /// \brief The member to which this member expression refers, which 1421 /// can be name, overloaded operator, or destructor. 1422 /// FIXME: could also be a template-id 1423 DeclarationName Member; 1424 1425 /// \brief The location of the member name. 1426 SourceLocation MemberLoc; 1427 1428public: 1429 CXXUnresolvedMemberExpr(ASTContext &C, 1430 Expr *Base, bool IsArrow, 1431 SourceLocation OperatorLoc, 1432 NestedNameSpecifier *Qualifier, 1433 SourceRange QualifierRange, 1434 NamedDecl *FirstQualifierFoundInScope, 1435 DeclarationName Member, 1436 SourceLocation MemberLoc) 1437 : Expr(CXXUnresolvedMemberExprClass, C.DependentTy, true, true), 1438 Base(Base), IsArrow(IsArrow), OperatorLoc(OperatorLoc), 1439 Qualifier(Qualifier), QualifierRange(QualifierRange), 1440 FirstQualifierFoundInScope(FirstQualifierFoundInScope), 1441 Member(Member), MemberLoc(MemberLoc) { } 1442 1443 /// \brief Retrieve the base object of this member expressions, 1444 /// e.g., the \c x in \c x.m. 1445 Expr *getBase() { return cast<Expr>(Base); } 1446 void setBase(Expr *E) { Base = E; } 1447 1448 /// \brief Determine whether this member expression used the '->' 1449 /// operator; otherwise, it used the '.' operator. 1450 bool isArrow() const { return IsArrow; } 1451 void setArrow(bool A) { IsArrow = A; } 1452 1453 /// \brief Retrieve the location of the '->' or '.' operator. 1454 SourceLocation getOperatorLoc() const { return OperatorLoc; } 1455 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 1456 1457 /// \brief Retrieve the nested-name-specifier that qualifies the member 1458 /// name. 1459 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1460 1461 /// \brief Retrieve the source range covering the nested-name-specifier 1462 /// that qualifies the member name. 1463 SourceRange getQualifierRange() const { return QualifierRange; } 1464 1465 /// \brief Retrieve the first part of the nested-name-specifier that was 1466 /// found in the scope of the member access expression when the member access 1467 /// was initially parsed. 1468 /// 1469 /// This function only returns a useful result when member access expression 1470 /// uses a qualified member name, e.g., "x.Base::f". Here, the declaration 1471 /// returned by this function describes what was found by unqualified name 1472 /// lookup for the identifier "Base" within the scope of the member access 1473 /// expression itself. At template instantiation time, this information is 1474 /// combined with the results of name lookup into the type of the object 1475 /// expression itself (the class type of x). 1476 NamedDecl *getFirstQualifierFoundInScope() const { 1477 return FirstQualifierFoundInScope; 1478 } 1479 1480 /// \brief Retrieve the name of the member that this expression 1481 /// refers to. 1482 DeclarationName getMember() const { return Member; } 1483 void setMember(DeclarationName N) { Member = N; } 1484 1485 // \brief Retrieve the location of the name of the member that this 1486 // expression refers to. 1487 SourceLocation getMemberLoc() const { return MemberLoc; } 1488 void setMemberLoc(SourceLocation L) { MemberLoc = L; } 1489 1490 virtual SourceRange getSourceRange() const { 1491 return SourceRange(Base->getSourceRange().getBegin(), 1492 MemberLoc); 1493 } 1494 static bool classof(const Stmt *T) { 1495 return T->getStmtClass() == CXXUnresolvedMemberExprClass; 1496 } 1497 static bool classof(const CXXUnresolvedMemberExpr *) { return true; } 1498 1499 // Iterators 1500 virtual child_iterator child_begin(); 1501 virtual child_iterator child_end(); 1502}; 1503 1504} // end namespace clang 1505 1506#endif 1507