ExprCXX.h revision 75345163535eb1765ba8fb971974be895645cb45
1//===--- ExprCXX.h - Classes for representing expressions -------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Expr interface and subclasses for C++ expressions. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_EXPRCXX_H 15#define LLVM_CLANG_AST_EXPRCXX_H 16 17#include "clang/Basic/TypeTraits.h" 18#include "clang/AST/Expr.h" 19#include "clang/AST/UnresolvedSet.h" 20#include "clang/AST/TemplateBase.h" 21 22namespace clang { 23 24 class CXXConstructorDecl; 25 class CXXDestructorDecl; 26 class CXXMethodDecl; 27 class CXXTemporary; 28 class TemplateArgumentListInfo; 29 30//===--------------------------------------------------------------------===// 31// C++ Expressions. 32//===--------------------------------------------------------------------===// 33 34/// \brief A call to an overloaded operator written using operator 35/// syntax. 36/// 37/// Represents a call to an overloaded operator written using operator 38/// syntax, e.g., "x + y" or "*p". While semantically equivalent to a 39/// normal call, this AST node provides better information about the 40/// syntactic representation of the call. 41/// 42/// In a C++ template, this expression node kind will be used whenever 43/// any of the arguments are type-dependent. In this case, the 44/// function itself will be a (possibly empty) set of functions and 45/// function templates that were found by name lookup at template 46/// definition time. 47class CXXOperatorCallExpr : public CallExpr { 48 /// \brief The overloaded operator. 49 OverloadedOperatorKind Operator; 50 51public: 52 CXXOperatorCallExpr(ASTContext& C, OverloadedOperatorKind Op, Expr *fn, 53 Expr **args, unsigned numargs, QualType t, 54 SourceLocation operatorloc) 55 : CallExpr(C, CXXOperatorCallExprClass, fn, args, numargs, t, operatorloc), 56 Operator(Op) {} 57 explicit CXXOperatorCallExpr(ASTContext& C, EmptyShell Empty) : 58 CallExpr(C, CXXOperatorCallExprClass, Empty) { } 59 60 61 /// getOperator - Returns the kind of overloaded operator that this 62 /// expression refers to. 63 OverloadedOperatorKind getOperator() const { return Operator; } 64 void setOperator(OverloadedOperatorKind Kind) { Operator = Kind; } 65 66 /// getOperatorLoc - Returns the location of the operator symbol in 67 /// the expression. When @c getOperator()==OO_Call, this is the 68 /// location of the right parentheses; when @c 69 /// getOperator()==OO_Subscript, this is the location of the right 70 /// bracket. 71 SourceLocation getOperatorLoc() const { return getRParenLoc(); } 72 73 virtual SourceRange getSourceRange() const; 74 75 static bool classof(const Stmt *T) { 76 return T->getStmtClass() == CXXOperatorCallExprClass; 77 } 78 static bool classof(const CXXOperatorCallExpr *) { return true; } 79}; 80 81/// CXXMemberCallExpr - Represents a call to a member function that 82/// may be written either with member call syntax (e.g., "obj.func()" 83/// or "objptr->func()") or with normal function-call syntax 84/// ("func()") within a member function that ends up calling a member 85/// function. The callee in either case is a MemberExpr that contains 86/// both the object argument and the member function, while the 87/// arguments are the arguments within the parentheses (not including 88/// the object argument). 89class CXXMemberCallExpr : public CallExpr { 90public: 91 CXXMemberCallExpr(ASTContext& C, Expr *fn, Expr **args, unsigned numargs, 92 QualType t, SourceLocation rparenloc) 93 : CallExpr(C, CXXMemberCallExprClass, fn, args, numargs, t, rparenloc) {} 94 95 /// getImplicitObjectArgument - Retrieves the implicit object 96 /// argument for the member call. For example, in "x.f(5)", this 97 /// operation would return "x". 98 Expr *getImplicitObjectArgument(); 99 100 virtual SourceRange getSourceRange() const; 101 102 static bool classof(const Stmt *T) { 103 return T->getStmtClass() == CXXMemberCallExprClass; 104 } 105 static bool classof(const CXXMemberCallExpr *) { return true; } 106}; 107 108/// CXXNamedCastExpr - Abstract class common to all of the C++ "named" 109/// casts, @c static_cast, @c dynamic_cast, @c reinterpret_cast, or @c 110/// const_cast. 111/// 112/// This abstract class is inherited by all of the classes 113/// representing "named" casts, e.g., CXXStaticCastExpr, 114/// CXXDynamicCastExpr, CXXReinterpretCastExpr, and CXXConstCastExpr. 115class CXXNamedCastExpr : public ExplicitCastExpr { 116private: 117 SourceLocation Loc; // the location of the casting op 118 119protected: 120 CXXNamedCastExpr(StmtClass SC, QualType ty, CastKind kind, Expr *op, 121 TypeSourceInfo *writtenTy, SourceLocation l) 122 : ExplicitCastExpr(SC, ty, kind, op, writtenTy), Loc(l) {} 123 124 explicit CXXNamedCastExpr(StmtClass SC, EmptyShell Shell) 125 : ExplicitCastExpr(SC, Shell) { } 126 127public: 128 const char *getCastName() const; 129 130 /// \brief Retrieve the location of the cast operator keyword, e.g., 131 /// "static_cast". 132 SourceLocation getOperatorLoc() const { return Loc; } 133 void setOperatorLoc(SourceLocation L) { Loc = L; } 134 135 virtual SourceRange getSourceRange() const { 136 return SourceRange(Loc, getSubExpr()->getSourceRange().getEnd()); 137 } 138 static bool classof(const Stmt *T) { 139 switch (T->getStmtClass()) { 140 case CXXNamedCastExprClass: 141 case CXXStaticCastExprClass: 142 case CXXDynamicCastExprClass: 143 case CXXReinterpretCastExprClass: 144 case CXXConstCastExprClass: 145 return true; 146 default: 147 return false; 148 } 149 } 150 static bool classof(const CXXNamedCastExpr *) { return true; } 151}; 152 153/// CXXStaticCastExpr - A C++ @c static_cast expression (C++ [expr.static.cast]). 154/// 155/// This expression node represents a C++ static cast, e.g., 156/// @c static_cast<int>(1.0). 157class CXXStaticCastExpr : public CXXNamedCastExpr { 158public: 159 CXXStaticCastExpr(QualType ty, CastKind kind, Expr *op, 160 TypeSourceInfo *writtenTy, SourceLocation l) 161 : CXXNamedCastExpr(CXXStaticCastExprClass, ty, kind, op, writtenTy, l) {} 162 163 explicit CXXStaticCastExpr(EmptyShell Empty) 164 : CXXNamedCastExpr(CXXStaticCastExprClass, Empty) { } 165 166 static bool classof(const Stmt *T) { 167 return T->getStmtClass() == CXXStaticCastExprClass; 168 } 169 static bool classof(const CXXStaticCastExpr *) { return true; } 170}; 171 172/// CXXDynamicCastExpr - A C++ @c dynamic_cast expression 173/// (C++ [expr.dynamic.cast]), which may perform a run-time check to 174/// determine how to perform the type cast. 175/// 176/// This expression node represents a dynamic cast, e.g., 177/// @c dynamic_cast<Derived*>(BasePtr). 178class CXXDynamicCastExpr : public CXXNamedCastExpr { 179public: 180 CXXDynamicCastExpr(QualType ty, CastKind kind, Expr *op, 181 TypeSourceInfo *writtenTy, SourceLocation l) 182 : CXXNamedCastExpr(CXXDynamicCastExprClass, ty, kind, op, writtenTy, l) {} 183 184 explicit CXXDynamicCastExpr(EmptyShell Empty) 185 : CXXNamedCastExpr(CXXDynamicCastExprClass, Empty) { } 186 187 static bool classof(const Stmt *T) { 188 return T->getStmtClass() == CXXDynamicCastExprClass; 189 } 190 static bool classof(const CXXDynamicCastExpr *) { return true; } 191}; 192 193/// CXXReinterpretCastExpr - A C++ @c reinterpret_cast expression (C++ 194/// [expr.reinterpret.cast]), which provides a differently-typed view 195/// of a value but performs no actual work at run time. 196/// 197/// This expression node represents a reinterpret cast, e.g., 198/// @c reinterpret_cast<int>(VoidPtr). 199class CXXReinterpretCastExpr : public CXXNamedCastExpr { 200public: 201 CXXReinterpretCastExpr(QualType ty, CastKind kind, Expr *op, 202 TypeSourceInfo *writtenTy, SourceLocation l) 203 : CXXNamedCastExpr(CXXReinterpretCastExprClass, ty, kind, op, 204 writtenTy, l) {} 205 206 explicit CXXReinterpretCastExpr(EmptyShell Empty) 207 : CXXNamedCastExpr(CXXReinterpretCastExprClass, Empty) { } 208 209 static bool classof(const Stmt *T) { 210 return T->getStmtClass() == CXXReinterpretCastExprClass; 211 } 212 static bool classof(const CXXReinterpretCastExpr *) { return true; } 213}; 214 215/// CXXConstCastExpr - A C++ @c const_cast expression (C++ [expr.const.cast]), 216/// which can remove type qualifiers but does not change the underlying value. 217/// 218/// This expression node represents a const cast, e.g., 219/// @c const_cast<char*>(PtrToConstChar). 220class CXXConstCastExpr : public CXXNamedCastExpr { 221public: 222 CXXConstCastExpr(QualType ty, Expr *op, TypeSourceInfo *writtenTy, 223 SourceLocation l) 224 : CXXNamedCastExpr(CXXConstCastExprClass, ty, CK_NoOp, op, writtenTy, l) {} 225 226 explicit CXXConstCastExpr(EmptyShell Empty) 227 : CXXNamedCastExpr(CXXConstCastExprClass, Empty) { } 228 229 static bool classof(const Stmt *T) { 230 return T->getStmtClass() == CXXConstCastExprClass; 231 } 232 static bool classof(const CXXConstCastExpr *) { return true; } 233}; 234 235/// CXXBoolLiteralExpr - [C++ 2.13.5] C++ Boolean Literal. 236/// 237class CXXBoolLiteralExpr : public Expr { 238 bool Value; 239 SourceLocation Loc; 240public: 241 CXXBoolLiteralExpr(bool val, QualType Ty, SourceLocation l) : 242 Expr(CXXBoolLiteralExprClass, Ty, false, false), Value(val), Loc(l) {} 243 244 bool getValue() const { return Value; } 245 246 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 247 248 static bool classof(const Stmt *T) { 249 return T->getStmtClass() == CXXBoolLiteralExprClass; 250 } 251 static bool classof(const CXXBoolLiteralExpr *) { return true; } 252 253 // Iterators 254 virtual child_iterator child_begin(); 255 virtual child_iterator child_end(); 256}; 257 258/// CXXNullPtrLiteralExpr - [C++0x 2.14.7] C++ Pointer Literal 259class CXXNullPtrLiteralExpr : public Expr { 260 SourceLocation Loc; 261public: 262 CXXNullPtrLiteralExpr(QualType Ty, SourceLocation l) : 263 Expr(CXXNullPtrLiteralExprClass, Ty, false, false), Loc(l) {} 264 265 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 266 267 static bool classof(const Stmt *T) { 268 return T->getStmtClass() == CXXNullPtrLiteralExprClass; 269 } 270 static bool classof(const CXXNullPtrLiteralExpr *) { return true; } 271 272 virtual child_iterator child_begin(); 273 virtual child_iterator child_end(); 274}; 275 276/// CXXTypeidExpr - A C++ @c typeid expression (C++ [expr.typeid]), which gets 277/// the type_info that corresponds to the supplied type, or the (possibly 278/// dynamic) type of the supplied expression. 279/// 280/// This represents code like @c typeid(int) or @c typeid(*objPtr) 281class CXXTypeidExpr : public Expr { 282private: 283 bool isTypeOp : 1; 284 union { 285 void *Ty; 286 Stmt *Ex; 287 } Operand; 288 SourceRange Range; 289 290public: 291 CXXTypeidExpr(bool isTypeOp, void *op, QualType Ty, const SourceRange r) : 292 Expr(CXXTypeidExprClass, Ty, 293 // typeid is never type-dependent (C++ [temp.dep.expr]p4) 294 false, 295 // typeid is value-dependent if the type or expression are dependent 296 (isTypeOp ? QualType::getFromOpaquePtr(op)->isDependentType() 297 : static_cast<Expr*>(op)->isValueDependent())), 298 isTypeOp(isTypeOp), Range(r) { 299 if (isTypeOp) 300 Operand.Ty = op; 301 else 302 // op was an Expr*, so cast it back to that to be safe 303 Operand.Ex = static_cast<Expr*>(op); 304 } 305 306 bool isTypeOperand() const { return isTypeOp; } 307 QualType getTypeOperand() const { 308 assert(isTypeOperand() && "Cannot call getTypeOperand for typeid(expr)"); 309 return QualType::getFromOpaquePtr(Operand.Ty); 310 } 311 Expr* getExprOperand() const { 312 assert(!isTypeOperand() && "Cannot call getExprOperand for typeid(type)"); 313 return static_cast<Expr*>(Operand.Ex); 314 } 315 316 virtual SourceRange getSourceRange() const { 317 return Range; 318 } 319 static bool classof(const Stmt *T) { 320 return T->getStmtClass() == CXXTypeidExprClass; 321 } 322 static bool classof(const CXXTypeidExpr *) { return true; } 323 324 // Iterators 325 virtual child_iterator child_begin(); 326 virtual child_iterator child_end(); 327}; 328 329/// CXXThisExpr - Represents the "this" expression in C++, which is a 330/// pointer to the object on which the current member function is 331/// executing (C++ [expr.prim]p3). Example: 332/// 333/// @code 334/// class Foo { 335/// public: 336/// void bar(); 337/// void test() { this->bar(); } 338/// }; 339/// @endcode 340class CXXThisExpr : public Expr { 341 SourceLocation Loc; 342 bool Implicit : 1; 343 344public: 345 CXXThisExpr(SourceLocation L, QualType Type, bool isImplicit) 346 : Expr(CXXThisExprClass, Type, 347 // 'this' is type-dependent if the class type of the enclosing 348 // member function is dependent (C++ [temp.dep.expr]p2) 349 Type->isDependentType(), Type->isDependentType()), 350 Loc(L), Implicit(isImplicit) { } 351 352 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 353 354 bool isImplicit() const { return Implicit; } 355 void setImplicit(bool I) { Implicit = I; } 356 357 static bool classof(const Stmt *T) { 358 return T->getStmtClass() == CXXThisExprClass; 359 } 360 static bool classof(const CXXThisExpr *) { return true; } 361 362 // Iterators 363 virtual child_iterator child_begin(); 364 virtual child_iterator child_end(); 365}; 366 367/// CXXThrowExpr - [C++ 15] C++ Throw Expression. This handles 368/// 'throw' and 'throw' assignment-expression. When 369/// assignment-expression isn't present, Op will be null. 370/// 371class CXXThrowExpr : public Expr { 372 Stmt *Op; 373 SourceLocation ThrowLoc; 374public: 375 // Ty is the void type which is used as the result type of the 376 // exepression. The l is the location of the throw keyword. expr 377 // can by null, if the optional expression to throw isn't present. 378 CXXThrowExpr(Expr *expr, QualType Ty, SourceLocation l) : 379 Expr(CXXThrowExprClass, Ty, false, false), Op(expr), ThrowLoc(l) {} 380 const Expr *getSubExpr() const { return cast_or_null<Expr>(Op); } 381 Expr *getSubExpr() { return cast_or_null<Expr>(Op); } 382 void setSubExpr(Expr *E) { Op = E; } 383 384 SourceLocation getThrowLoc() const { return ThrowLoc; } 385 void setThrowLoc(SourceLocation L) { ThrowLoc = L; } 386 387 virtual SourceRange getSourceRange() const { 388 if (getSubExpr() == 0) 389 return SourceRange(ThrowLoc, ThrowLoc); 390 return SourceRange(ThrowLoc, getSubExpr()->getSourceRange().getEnd()); 391 } 392 393 static bool classof(const Stmt *T) { 394 return T->getStmtClass() == CXXThrowExprClass; 395 } 396 static bool classof(const CXXThrowExpr *) { return true; } 397 398 // Iterators 399 virtual child_iterator child_begin(); 400 virtual child_iterator child_end(); 401}; 402 403/// CXXDefaultArgExpr - C++ [dcl.fct.default]. This wraps up a 404/// function call argument that was created from the corresponding 405/// parameter's default argument, when the call did not explicitly 406/// supply arguments for all of the parameters. 407class CXXDefaultArgExpr : public Expr { 408 /// \brief The parameter whose default is being used. 409 /// 410 /// When the bit is set, the subexpression is stored after the 411 /// CXXDefaultArgExpr itself. When the bit is clear, the parameter's 412 /// actual default expression is the subexpression. 413 llvm::PointerIntPair<ParmVarDecl *, 1, bool> Param; 414 415 /// \brief The location where the default argument expression was used. 416 SourceLocation Loc; 417 418protected: 419 CXXDefaultArgExpr(StmtClass SC, SourceLocation Loc, ParmVarDecl *param) 420 : Expr(SC, 421 param->hasUnparsedDefaultArg() 422 ? param->getType().getNonReferenceType() 423 : param->getDefaultArg()->getType(), 424 false, false), 425 Param(param, false), Loc(Loc) { } 426 427 CXXDefaultArgExpr(StmtClass SC, SourceLocation Loc, ParmVarDecl *param, 428 Expr *SubExpr) 429 : Expr(SC, SubExpr->getType(), false, false), Param(param, true), Loc(Loc) 430 { 431 *reinterpret_cast<Expr **>(this + 1) = SubExpr; 432 } 433 434protected: 435 virtual void DoDestroy(ASTContext &C); 436 437public: 438 // Param is the parameter whose default argument is used by this 439 // expression. 440 static CXXDefaultArgExpr *Create(ASTContext &C, SourceLocation Loc, 441 ParmVarDecl *Param) { 442 return new (C) CXXDefaultArgExpr(CXXDefaultArgExprClass, Loc, Param); 443 } 444 445 // Param is the parameter whose default argument is used by this 446 // expression, and SubExpr is the expression that will actually be used. 447 static CXXDefaultArgExpr *Create(ASTContext &C, 448 SourceLocation Loc, 449 ParmVarDecl *Param, 450 Expr *SubExpr); 451 452 // Retrieve the parameter that the argument was created from. 453 const ParmVarDecl *getParam() const { return Param.getPointer(); } 454 ParmVarDecl *getParam() { return Param.getPointer(); } 455 456 // Retrieve the actual argument to the function call. 457 const Expr *getExpr() const { 458 if (Param.getInt()) 459 return *reinterpret_cast<Expr const * const*> (this + 1); 460 return getParam()->getDefaultArg(); 461 } 462 Expr *getExpr() { 463 if (Param.getInt()) 464 return *reinterpret_cast<Expr **> (this + 1); 465 return getParam()->getDefaultArg(); 466 } 467 468 /// \brief Retrieve the location where this default argument was actually 469 /// used. 470 SourceLocation getUsedLocation() const { return Loc; } 471 472 virtual SourceRange getSourceRange() const { 473 // Default argument expressions have no representation in the 474 // source, so they have an empty source range. 475 return SourceRange(); 476 } 477 478 static bool classof(const Stmt *T) { 479 return T->getStmtClass() == CXXDefaultArgExprClass; 480 } 481 static bool classof(const CXXDefaultArgExpr *) { return true; } 482 483 // Iterators 484 virtual child_iterator child_begin(); 485 virtual child_iterator child_end(); 486}; 487 488/// CXXTemporary - Represents a C++ temporary. 489class CXXTemporary { 490 /// Destructor - The destructor that needs to be called. 491 const CXXDestructorDecl *Destructor; 492 493 CXXTemporary(const CXXDestructorDecl *destructor) 494 : Destructor(destructor) { } 495 ~CXXTemporary() { } 496 497public: 498 static CXXTemporary *Create(ASTContext &C, 499 const CXXDestructorDecl *Destructor); 500 501 void Destroy(ASTContext &Ctx); 502 503 const CXXDestructorDecl *getDestructor() const { return Destructor; } 504}; 505 506/// CXXBindTemporaryExpr - Represents binding an expression to a temporary, 507/// so its destructor can be called later. 508class CXXBindTemporaryExpr : public Expr { 509 CXXTemporary *Temp; 510 511 Stmt *SubExpr; 512 513 CXXBindTemporaryExpr(CXXTemporary *temp, Expr* subexpr) 514 : Expr(CXXBindTemporaryExprClass, subexpr->getType(), false, false), 515 Temp(temp), SubExpr(subexpr) { } 516 ~CXXBindTemporaryExpr() { } 517 518protected: 519 virtual void DoDestroy(ASTContext &C); 520 521public: 522 static CXXBindTemporaryExpr *Create(ASTContext &C, CXXTemporary *Temp, 523 Expr* SubExpr); 524 525 CXXTemporary *getTemporary() { return Temp; } 526 const CXXTemporary *getTemporary() const { return Temp; } 527 528 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 529 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 530 void setSubExpr(Expr *E) { SubExpr = E; } 531 532 virtual SourceRange getSourceRange() const { 533 return SubExpr->getSourceRange(); 534 } 535 536 // Implement isa/cast/dyncast/etc. 537 static bool classof(const Stmt *T) { 538 return T->getStmtClass() == CXXBindTemporaryExprClass; 539 } 540 static bool classof(const CXXBindTemporaryExpr *) { return true; } 541 542 // Iterators 543 virtual child_iterator child_begin(); 544 virtual child_iterator child_end(); 545}; 546 547/// CXXConstructExpr - Represents a call to a C++ constructor. 548class CXXConstructExpr : public Expr { 549 CXXConstructorDecl *Constructor; 550 551 SourceLocation Loc; 552 bool Elidable : 1; 553 bool ZeroInitialization : 1; 554 Stmt **Args; 555 unsigned NumArgs; 556 557protected: 558 CXXConstructExpr(ASTContext &C, StmtClass SC, QualType T, 559 SourceLocation Loc, 560 CXXConstructorDecl *d, bool elidable, 561 Expr **args, unsigned numargs, 562 bool ZeroInitialization = false); 563 ~CXXConstructExpr() { } 564 565 virtual void DoDestroy(ASTContext &C); 566 567public: 568 /// \brief Construct an empty C++ construction expression that will store 569 /// \p numargs arguments. 570 CXXConstructExpr(EmptyShell Empty, ASTContext &C, unsigned numargs); 571 572 static CXXConstructExpr *Create(ASTContext &C, QualType T, 573 SourceLocation Loc, 574 CXXConstructorDecl *D, bool Elidable, 575 Expr **Args, unsigned NumArgs, 576 bool ZeroInitialization = false); 577 578 579 CXXConstructorDecl* getConstructor() const { return Constructor; } 580 void setConstructor(CXXConstructorDecl *C) { Constructor = C; } 581 582 SourceLocation getLocation() const { return Loc; } 583 void setLocation(SourceLocation Loc) { this->Loc = Loc; } 584 585 /// \brief Whether this construction is elidable. 586 bool isElidable() const { return Elidable; } 587 void setElidable(bool E) { Elidable = E; } 588 589 /// \brief Whether this construction first requires 590 /// zero-initialization before the initializer is called. 591 bool requiresZeroInitialization() const { return ZeroInitialization; } 592 void setRequiresZeroInitialization(bool ZeroInit) { 593 ZeroInitialization = ZeroInit; 594 } 595 596 typedef ExprIterator arg_iterator; 597 typedef ConstExprIterator const_arg_iterator; 598 599 arg_iterator arg_begin() { return Args; } 600 arg_iterator arg_end() { return Args + NumArgs; } 601 const_arg_iterator arg_begin() const { return Args; } 602 const_arg_iterator arg_end() const { return Args + NumArgs; } 603 604 Expr **getArgs() const { return reinterpret_cast<Expr **>(Args); } 605 unsigned getNumArgs() const { return NumArgs; } 606 607 /// getArg - Return the specified argument. 608 Expr *getArg(unsigned Arg) { 609 assert(Arg < NumArgs && "Arg access out of range!"); 610 return cast<Expr>(Args[Arg]); 611 } 612 const Expr *getArg(unsigned Arg) const { 613 assert(Arg < NumArgs && "Arg access out of range!"); 614 return cast<Expr>(Args[Arg]); 615 } 616 617 /// setArg - Set the specified argument. 618 void setArg(unsigned Arg, Expr *ArgExpr) { 619 assert(Arg < NumArgs && "Arg access out of range!"); 620 Args[Arg] = ArgExpr; 621 } 622 623 virtual SourceRange getSourceRange() const; 624 625 static bool classof(const Stmt *T) { 626 return T->getStmtClass() == CXXConstructExprClass || 627 T->getStmtClass() == CXXTemporaryObjectExprClass; 628 } 629 static bool classof(const CXXConstructExpr *) { return true; } 630 631 // Iterators 632 virtual child_iterator child_begin(); 633 virtual child_iterator child_end(); 634}; 635 636/// CXXFunctionalCastExpr - Represents an explicit C++ type conversion 637/// that uses "functional" notion (C++ [expr.type.conv]). Example: @c 638/// x = int(0.5); 639class CXXFunctionalCastExpr : public ExplicitCastExpr { 640 SourceLocation TyBeginLoc; 641 SourceLocation RParenLoc; 642public: 643 CXXFunctionalCastExpr(QualType ty, TypeSourceInfo *writtenTy, 644 SourceLocation tyBeginLoc, CastKind kind, 645 Expr *castExpr, SourceLocation rParenLoc) 646 : ExplicitCastExpr(CXXFunctionalCastExprClass, ty, kind, castExpr, 647 writtenTy), 648 TyBeginLoc(tyBeginLoc), RParenLoc(rParenLoc) {} 649 650 explicit CXXFunctionalCastExpr(EmptyShell Shell) 651 : ExplicitCastExpr(CXXFunctionalCastExprClass, Shell) { } 652 653 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 654 void setTypeBeginLoc(SourceLocation L) { TyBeginLoc = L; } 655 SourceLocation getRParenLoc() const { return RParenLoc; } 656 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 657 658 virtual SourceRange getSourceRange() const { 659 return SourceRange(TyBeginLoc, RParenLoc); 660 } 661 static bool classof(const Stmt *T) { 662 return T->getStmtClass() == CXXFunctionalCastExprClass; 663 } 664 static bool classof(const CXXFunctionalCastExpr *) { return true; } 665}; 666 667/// @brief Represents a C++ functional cast expression that builds a 668/// temporary object. 669/// 670/// This expression type represents a C++ "functional" cast 671/// (C++[expr.type.conv]) with N != 1 arguments that invokes a 672/// constructor to build a temporary object. If N == 0 but no 673/// constructor will be called (because the functional cast is 674/// performing a value-initialized an object whose class type has no 675/// user-declared constructors), CXXZeroInitValueExpr will represent 676/// the functional cast. Finally, with N == 1 arguments the functional 677/// cast expression will be represented by CXXFunctionalCastExpr. 678/// Example: 679/// @code 680/// struct X { X(int, float); } 681/// 682/// X create_X() { 683/// return X(1, 3.14f); // creates a CXXTemporaryObjectExpr 684/// }; 685/// @endcode 686class CXXTemporaryObjectExpr : public CXXConstructExpr { 687 SourceLocation TyBeginLoc; 688 SourceLocation RParenLoc; 689 690public: 691 CXXTemporaryObjectExpr(ASTContext &C, CXXConstructorDecl *Cons, 692 QualType writtenTy, SourceLocation tyBeginLoc, 693 Expr **Args,unsigned NumArgs, 694 SourceLocation rParenLoc); 695 696 ~CXXTemporaryObjectExpr() { } 697 698 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 699 SourceLocation getRParenLoc() const { return RParenLoc; } 700 701 virtual SourceRange getSourceRange() const { 702 return SourceRange(TyBeginLoc, RParenLoc); 703 } 704 static bool classof(const Stmt *T) { 705 return T->getStmtClass() == CXXTemporaryObjectExprClass; 706 } 707 static bool classof(const CXXTemporaryObjectExpr *) { return true; } 708}; 709 710/// CXXZeroInitValueExpr - [C++ 5.2.3p2] 711/// Expression "T()" which creates a value-initialized rvalue of type 712/// T, which is either a non-class type or a class type without any 713/// user-defined constructors. 714/// 715class CXXZeroInitValueExpr : public Expr { 716 SourceLocation TyBeginLoc; 717 SourceLocation RParenLoc; 718 719public: 720 CXXZeroInitValueExpr(QualType ty, SourceLocation tyBeginLoc, 721 SourceLocation rParenLoc ) : 722 Expr(CXXZeroInitValueExprClass, ty, false, false), 723 TyBeginLoc(tyBeginLoc), RParenLoc(rParenLoc) {} 724 725 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 726 SourceLocation getRParenLoc() const { return RParenLoc; } 727 728 /// @brief Whether this initialization expression was 729 /// implicitly-generated. 730 bool isImplicit() const { 731 return TyBeginLoc.isInvalid() && RParenLoc.isInvalid(); 732 } 733 734 virtual SourceRange getSourceRange() const { 735 return SourceRange(TyBeginLoc, RParenLoc); 736 } 737 738 static bool classof(const Stmt *T) { 739 return T->getStmtClass() == CXXZeroInitValueExprClass; 740 } 741 static bool classof(const CXXZeroInitValueExpr *) { return true; } 742 743 // Iterators 744 virtual child_iterator child_begin(); 745 virtual child_iterator child_end(); 746}; 747 748/// CXXNewExpr - A new expression for memory allocation and constructor calls, 749/// e.g: "new CXXNewExpr(foo)". 750class CXXNewExpr : public Expr { 751 // Was the usage ::new, i.e. is the global new to be used? 752 bool GlobalNew : 1; 753 // Was the form (type-id) used? Otherwise, it was new-type-id. 754 bool ParenTypeId : 1; 755 // Is there an initializer? If not, built-ins are uninitialized, else they're 756 // value-initialized. 757 bool Initializer : 1; 758 // Do we allocate an array? If so, the first SubExpr is the size expression. 759 bool Array : 1; 760 // The number of placement new arguments. 761 unsigned NumPlacementArgs : 14; 762 // The number of constructor arguments. This may be 1 even for non-class 763 // types; use the pseudo copy constructor. 764 unsigned NumConstructorArgs : 14; 765 // Contains an optional array size expression, any number of optional 766 // placement arguments, and any number of optional constructor arguments, 767 // in that order. 768 Stmt **SubExprs; 769 // Points to the allocation function used. 770 FunctionDecl *OperatorNew; 771 // Points to the deallocation function used in case of error. May be null. 772 FunctionDecl *OperatorDelete; 773 // Points to the constructor used. Cannot be null if AllocType is a record; 774 // it would still point at the default constructor (even an implicit one). 775 // Must be null for all other types. 776 CXXConstructorDecl *Constructor; 777 778 SourceLocation StartLoc; 779 SourceLocation EndLoc; 780 781public: 782 CXXNewExpr(bool globalNew, FunctionDecl *operatorNew, Expr **placementArgs, 783 unsigned numPlaceArgs, bool ParenTypeId, Expr *arraySize, 784 CXXConstructorDecl *constructor, bool initializer, 785 Expr **constructorArgs, unsigned numConsArgs, 786 FunctionDecl *operatorDelete, QualType ty, 787 SourceLocation startLoc, SourceLocation endLoc); 788 ~CXXNewExpr() { 789 delete[] SubExprs; 790 } 791 792 QualType getAllocatedType() const { 793 assert(getType()->isPointerType()); 794 return getType()->getAs<PointerType>()->getPointeeType(); 795 } 796 797 FunctionDecl *getOperatorNew() const { return OperatorNew; } 798 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 799 CXXConstructorDecl *getConstructor() const { return Constructor; } 800 801 bool isArray() const { return Array; } 802 Expr *getArraySize() { 803 return Array ? cast<Expr>(SubExprs[0]) : 0; 804 } 805 const Expr *getArraySize() const { 806 return Array ? cast<Expr>(SubExprs[0]) : 0; 807 } 808 809 unsigned getNumPlacementArgs() const { return NumPlacementArgs; } 810 Expr *getPlacementArg(unsigned i) { 811 assert(i < NumPlacementArgs && "Index out of range"); 812 return cast<Expr>(SubExprs[Array + i]); 813 } 814 const Expr *getPlacementArg(unsigned i) const { 815 assert(i < NumPlacementArgs && "Index out of range"); 816 return cast<Expr>(SubExprs[Array + i]); 817 } 818 819 bool isGlobalNew() const { return GlobalNew; } 820 bool isParenTypeId() const { return ParenTypeId; } 821 bool hasInitializer() const { return Initializer; } 822 823 unsigned getNumConstructorArgs() const { return NumConstructorArgs; } 824 Expr *getConstructorArg(unsigned i) { 825 assert(i < NumConstructorArgs && "Index out of range"); 826 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 827 } 828 const Expr *getConstructorArg(unsigned i) const { 829 assert(i < NumConstructorArgs && "Index out of range"); 830 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 831 } 832 833 typedef ExprIterator arg_iterator; 834 typedef ConstExprIterator const_arg_iterator; 835 836 arg_iterator placement_arg_begin() { 837 return SubExprs + Array; 838 } 839 arg_iterator placement_arg_end() { 840 return SubExprs + Array + getNumPlacementArgs(); 841 } 842 const_arg_iterator placement_arg_begin() const { 843 return SubExprs + Array; 844 } 845 const_arg_iterator placement_arg_end() const { 846 return SubExprs + Array + getNumPlacementArgs(); 847 } 848 849 arg_iterator constructor_arg_begin() { 850 return SubExprs + Array + getNumPlacementArgs(); 851 } 852 arg_iterator constructor_arg_end() { 853 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 854 } 855 const_arg_iterator constructor_arg_begin() const { 856 return SubExprs + Array + getNumPlacementArgs(); 857 } 858 const_arg_iterator constructor_arg_end() const { 859 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 860 } 861 862 virtual SourceRange getSourceRange() const { 863 return SourceRange(StartLoc, EndLoc); 864 } 865 866 static bool classof(const Stmt *T) { 867 return T->getStmtClass() == CXXNewExprClass; 868 } 869 static bool classof(const CXXNewExpr *) { return true; } 870 871 // Iterators 872 virtual child_iterator child_begin(); 873 virtual child_iterator child_end(); 874}; 875 876/// CXXDeleteExpr - A delete expression for memory deallocation and destructor 877/// calls, e.g. "delete[] pArray". 878class CXXDeleteExpr : public Expr { 879 // Is this a forced global delete, i.e. "::delete"? 880 bool GlobalDelete : 1; 881 // Is this the array form of delete, i.e. "delete[]"? 882 bool ArrayForm : 1; 883 // Points to the operator delete overload that is used. Could be a member. 884 FunctionDecl *OperatorDelete; 885 // The pointer expression to be deleted. 886 Stmt *Argument; 887 // Location of the expression. 888 SourceLocation Loc; 889public: 890 CXXDeleteExpr(QualType ty, bool globalDelete, bool arrayForm, 891 FunctionDecl *operatorDelete, Expr *arg, SourceLocation loc) 892 : Expr(CXXDeleteExprClass, ty, false, false), GlobalDelete(globalDelete), 893 ArrayForm(arrayForm), OperatorDelete(operatorDelete), Argument(arg), 894 Loc(loc) { } 895 896 bool isGlobalDelete() const { return GlobalDelete; } 897 bool isArrayForm() const { return ArrayForm; } 898 899 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 900 901 Expr *getArgument() { return cast<Expr>(Argument); } 902 const Expr *getArgument() const { return cast<Expr>(Argument); } 903 904 virtual SourceRange getSourceRange() const { 905 return SourceRange(Loc, Argument->getLocEnd()); 906 } 907 908 static bool classof(const Stmt *T) { 909 return T->getStmtClass() == CXXDeleteExprClass; 910 } 911 static bool classof(const CXXDeleteExpr *) { return true; } 912 913 // Iterators 914 virtual child_iterator child_begin(); 915 virtual child_iterator child_end(); 916}; 917 918/// \brief Represents a C++ pseudo-destructor (C++ [expr.pseudo]). 919/// 920/// Example: 921/// 922/// \code 923/// template<typename T> 924/// void destroy(T* ptr) { 925/// ptr->~T(); 926/// } 927/// \endcode 928/// 929/// When the template is parsed, the expression \c ptr->~T will be stored as 930/// a member reference expression. If it then instantiated with a scalar type 931/// as a template argument for T, the resulting expression will be a 932/// pseudo-destructor expression. 933class CXXPseudoDestructorExpr : public Expr { 934 /// \brief The base expression (that is being destroyed). 935 Stmt *Base; 936 937 /// \brief Whether the operator was an arrow ('->'); otherwise, it was a 938 /// period ('.'). 939 bool IsArrow : 1; 940 941 /// \brief The location of the '.' or '->' operator. 942 SourceLocation OperatorLoc; 943 944 /// \brief The nested-name-specifier that follows the operator, if present. 945 NestedNameSpecifier *Qualifier; 946 947 /// \brief The source range that covers the nested-name-specifier, if 948 /// present. 949 SourceRange QualifierRange; 950 951 /// \brief The type being destroyed. 952 QualType DestroyedType; 953 954 /// \brief The location of the type after the '~'. 955 SourceLocation DestroyedTypeLoc; 956 957public: 958 CXXPseudoDestructorExpr(ASTContext &Context, 959 Expr *Base, bool isArrow, SourceLocation OperatorLoc, 960 NestedNameSpecifier *Qualifier, 961 SourceRange QualifierRange, 962 QualType DestroyedType, 963 SourceLocation DestroyedTypeLoc) 964 : Expr(CXXPseudoDestructorExprClass, 965 Context.getPointerType(Context.getFunctionType(Context.VoidTy, 0, 0, 966 false, 0)), 967 /*isTypeDependent=*/false, 968 /*isValueDependent=*/Base->isValueDependent()), 969 Base(static_cast<Stmt *>(Base)), IsArrow(isArrow), 970 OperatorLoc(OperatorLoc), Qualifier(Qualifier), 971 QualifierRange(QualifierRange), DestroyedType(DestroyedType), 972 DestroyedTypeLoc(DestroyedTypeLoc) { } 973 974 void setBase(Expr *E) { Base = E; } 975 Expr *getBase() const { return cast<Expr>(Base); } 976 977 /// \brief Determines whether this member expression actually had 978 /// a C++ nested-name-specifier prior to the name of the member, e.g., 979 /// x->Base::foo. 980 bool hasQualifier() const { return Qualifier != 0; } 981 982 /// \brief If the member name was qualified, retrieves the source range of 983 /// the nested-name-specifier that precedes the member name. Otherwise, 984 /// returns an empty source range. 985 SourceRange getQualifierRange() const { return QualifierRange; } 986 987 /// \brief If the member name was qualified, retrieves the 988 /// nested-name-specifier that precedes the member name. Otherwise, returns 989 /// NULL. 990 NestedNameSpecifier *getQualifier() const { return Qualifier; } 991 992 /// \brief Determine whether this pseudo-destructor expression was written 993 /// using an '->' (otherwise, it used a '.'). 994 bool isArrow() const { return IsArrow; } 995 void setArrow(bool A) { IsArrow = A; } 996 997 /// \brief Retrieve the location of the '.' or '->' operator. 998 SourceLocation getOperatorLoc() const { return OperatorLoc; } 999 1000 /// \brief Retrieve the type that is being destroyed. 1001 QualType getDestroyedType() const { return DestroyedType; } 1002 1003 /// \brief Retrieve the location of the type being destroyed. 1004 SourceLocation getDestroyedTypeLoc() const { return DestroyedTypeLoc; } 1005 1006 virtual SourceRange getSourceRange() const { 1007 return SourceRange(Base->getLocStart(), DestroyedTypeLoc); 1008 } 1009 1010 static bool classof(const Stmt *T) { 1011 return T->getStmtClass() == CXXPseudoDestructorExprClass; 1012 } 1013 static bool classof(const CXXPseudoDestructorExpr *) { return true; } 1014 1015 // Iterators 1016 virtual child_iterator child_begin(); 1017 virtual child_iterator child_end(); 1018}; 1019 1020/// UnaryTypeTraitExpr - A GCC or MS unary type trait, as used in the 1021/// implementation of TR1/C++0x type trait templates. 1022/// Example: 1023/// __is_pod(int) == true 1024/// __is_enum(std::string) == false 1025class UnaryTypeTraitExpr : public Expr { 1026 /// UTT - The trait. 1027 UnaryTypeTrait UTT; 1028 1029 /// Loc - The location of the type trait keyword. 1030 SourceLocation Loc; 1031 1032 /// RParen - The location of the closing paren. 1033 SourceLocation RParen; 1034 1035 /// QueriedType - The type we're testing. 1036 QualType QueriedType; 1037 1038public: 1039 UnaryTypeTraitExpr(SourceLocation loc, UnaryTypeTrait utt, QualType queried, 1040 SourceLocation rparen, QualType ty) 1041 : Expr(UnaryTypeTraitExprClass, ty, false, queried->isDependentType()), 1042 UTT(utt), Loc(loc), RParen(rparen), QueriedType(queried) { } 1043 1044 virtual SourceRange getSourceRange() const { return SourceRange(Loc, RParen);} 1045 1046 UnaryTypeTrait getTrait() const { return UTT; } 1047 1048 QualType getQueriedType() const { return QueriedType; } 1049 1050 bool EvaluateTrait(ASTContext&) const; 1051 1052 static bool classof(const Stmt *T) { 1053 return T->getStmtClass() == UnaryTypeTraitExprClass; 1054 } 1055 static bool classof(const UnaryTypeTraitExpr *) { return true; } 1056 1057 // Iterators 1058 virtual child_iterator child_begin(); 1059 virtual child_iterator child_end(); 1060}; 1061 1062/// \brief A reference to a name which we were able to look up during 1063/// parsing but could not resolve to a specific declaration. This 1064/// arises in several ways: 1065/// * we might be waiting for argument-dependent lookup 1066/// * the name might resolve to an overloaded function 1067/// and eventually: 1068/// * the lookup might have included a function template 1069/// These never include UnresolvedUsingValueDecls, which are always 1070/// class members and therefore appear only in 1071/// UnresolvedMemberLookupExprs. 1072class UnresolvedLookupExpr : public Expr { 1073 /// The results. These are undesugared, which is to say, they may 1074 /// include UsingShadowDecls. 1075 UnresolvedSet<4> Results; 1076 1077 /// The name declared. 1078 DeclarationName Name; 1079 1080 /// The qualifier given, if any. 1081 NestedNameSpecifier *Qualifier; 1082 1083 /// The source range of the nested name specifier. 1084 SourceRange QualifierRange; 1085 1086 /// The location of the name. 1087 SourceLocation NameLoc; 1088 1089 /// True if these lookup results should be extended by 1090 /// argument-dependent lookup if this is the operand of a function 1091 /// call. 1092 bool RequiresADL; 1093 1094 /// True if these lookup results are overloaded. This is pretty 1095 /// trivially rederivable if we urgently need to kill this field. 1096 bool Overloaded; 1097 1098 /// True if the name looked up had explicit template arguments. 1099 /// This requires all the results to be function templates. 1100 bool HasExplicitTemplateArgs; 1101 1102 UnresolvedLookupExpr(QualType T, bool Dependent, 1103 NestedNameSpecifier *Qualifier, SourceRange QRange, 1104 DeclarationName Name, SourceLocation NameLoc, 1105 bool RequiresADL, bool Overloaded, bool HasTemplateArgs) 1106 : Expr(UnresolvedLookupExprClass, T, Dependent, Dependent), 1107 Name(Name), Qualifier(Qualifier), QualifierRange(QRange), 1108 NameLoc(NameLoc), RequiresADL(RequiresADL), Overloaded(Overloaded), 1109 HasExplicitTemplateArgs(HasTemplateArgs) 1110 {} 1111 1112public: 1113 static UnresolvedLookupExpr *Create(ASTContext &C, 1114 bool Dependent, 1115 NestedNameSpecifier *Qualifier, 1116 SourceRange QualifierRange, 1117 DeclarationName Name, 1118 SourceLocation NameLoc, 1119 bool ADL, bool Overloaded) { 1120 return new(C) UnresolvedLookupExpr(Dependent ? C.DependentTy : C.OverloadTy, 1121 Dependent, Qualifier, QualifierRange, 1122 Name, NameLoc, ADL, Overloaded, false); 1123 } 1124 1125 static UnresolvedLookupExpr *Create(ASTContext &C, 1126 bool Dependent, 1127 NestedNameSpecifier *Qualifier, 1128 SourceRange QualifierRange, 1129 DeclarationName Name, 1130 SourceLocation NameLoc, 1131 bool ADL, 1132 const TemplateArgumentListInfo &Args); 1133 1134 /// Computes whether an unresolved lookup on the given declarations 1135 /// and optional template arguments is type- and value-dependent. 1136 static bool ComputeDependence(UnresolvedSetImpl::const_iterator Begin, 1137 UnresolvedSetImpl::const_iterator End, 1138 const TemplateArgumentListInfo *Args); 1139 1140 void addDecls(UnresolvedSetIterator Begin, UnresolvedSetIterator End) { 1141 Results.append(Begin, End); 1142 } 1143 1144 void addDecl(NamedDecl *Decl) { 1145 Results.addDecl(Decl); 1146 } 1147 1148 typedef UnresolvedSetImpl::iterator decls_iterator; 1149 decls_iterator decls_begin() const { return Results.begin(); } 1150 decls_iterator decls_end() const { return Results.end(); } 1151 1152 /// Retrieves the decls as an unresolved set. 1153 const UnresolvedSetImpl &getDecls() { return Results; } 1154 1155 /// True if this declaration should be extended by 1156 /// argument-dependent lookup. 1157 bool requiresADL() const { return RequiresADL; } 1158 1159 /// True if this lookup is overloaded. 1160 bool isOverloaded() const { return Overloaded; } 1161 1162 /// Fetches the name looked up. 1163 DeclarationName getName() const { return Name; } 1164 1165 /// Gets the location of the name. 1166 SourceLocation getNameLoc() const { return NameLoc; } 1167 1168 /// Fetches the nested-name qualifier, if one was given. 1169 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1170 1171 /// Fetches the range of the nested-name qualifier. 1172 SourceRange getQualifierRange() const { return QualifierRange; } 1173 1174 /// Determines whether this lookup had explicit template arguments. 1175 bool hasExplicitTemplateArgs() const { return HasExplicitTemplateArgs; } 1176 1177 // Note that, inconsistently with the explicit-template-argument AST 1178 // nodes, users are *forbidden* from calling these methods on objects 1179 // without explicit template arguments. 1180 1181 /// Gets a reference to the explicit template argument list. 1182 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1183 assert(hasExplicitTemplateArgs()); 1184 return *reinterpret_cast<const ExplicitTemplateArgumentList*>(this + 1); 1185 } 1186 1187 /// \brief Copies the template arguments (if present) into the given 1188 /// structure. 1189 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1190 getExplicitTemplateArgs().copyInto(List); 1191 } 1192 1193 SourceLocation getLAngleLoc() const { 1194 return getExplicitTemplateArgs().LAngleLoc; 1195 } 1196 1197 SourceLocation getRAngleLoc() const { 1198 return getExplicitTemplateArgs().RAngleLoc; 1199 } 1200 1201 TemplateArgumentLoc const *getTemplateArgs() const { 1202 return getExplicitTemplateArgs().getTemplateArgs(); 1203 } 1204 1205 unsigned getNumTemplateArgs() const { 1206 return getExplicitTemplateArgs().NumTemplateArgs; 1207 } 1208 1209 virtual SourceRange getSourceRange() const { 1210 SourceRange Range(NameLoc); 1211 if (Qualifier) Range.setBegin(QualifierRange.getBegin()); 1212 if (hasExplicitTemplateArgs()) Range.setEnd(getRAngleLoc()); 1213 return Range; 1214 } 1215 1216 virtual StmtIterator child_begin(); 1217 virtual StmtIterator child_end(); 1218 1219 static bool classof(const Stmt *T) { 1220 return T->getStmtClass() == UnresolvedLookupExprClass; 1221 } 1222 static bool classof(const UnresolvedLookupExpr *) { return true; } 1223}; 1224 1225/// \brief A qualified reference to a name whose declaration cannot 1226/// yet be resolved. 1227/// 1228/// DependentScopeDeclRefExpr is similar to DeclRefExpr in that 1229/// it expresses a reference to a declaration such as 1230/// X<T>::value. The difference, however, is that an 1231/// DependentScopeDeclRefExpr node is used only within C++ templates when 1232/// the qualification (e.g., X<T>::) refers to a dependent type. In 1233/// this case, X<T>::value cannot resolve to a declaration because the 1234/// declaration will differ from on instantiation of X<T> to the 1235/// next. Therefore, DependentScopeDeclRefExpr keeps track of the 1236/// qualifier (X<T>::) and the name of the entity being referenced 1237/// ("value"). Such expressions will instantiate to a DeclRefExpr once the 1238/// declaration can be found. 1239class DependentScopeDeclRefExpr : public Expr { 1240 /// The name of the entity we will be referencing. 1241 DeclarationName Name; 1242 1243 /// Location of the name of the declaration we're referencing. 1244 SourceLocation Loc; 1245 1246 /// QualifierRange - The source range that covers the 1247 /// nested-name-specifier. 1248 SourceRange QualifierRange; 1249 1250 /// \brief The nested-name-specifier that qualifies this unresolved 1251 /// declaration name. 1252 NestedNameSpecifier *Qualifier; 1253 1254 /// \brief Whether the name includes explicit template arguments. 1255 bool HasExplicitTemplateArgs; 1256 1257 DependentScopeDeclRefExpr(QualType T, 1258 NestedNameSpecifier *Qualifier, 1259 SourceRange QualifierRange, 1260 DeclarationName Name, 1261 SourceLocation NameLoc, 1262 bool HasExplicitTemplateArgs) 1263 : Expr(DependentScopeDeclRefExprClass, T, true, true), 1264 Name(Name), Loc(NameLoc), 1265 QualifierRange(QualifierRange), Qualifier(Qualifier), 1266 HasExplicitTemplateArgs(HasExplicitTemplateArgs) 1267 {} 1268 1269public: 1270 static DependentScopeDeclRefExpr *Create(ASTContext &C, 1271 NestedNameSpecifier *Qualifier, 1272 SourceRange QualifierRange, 1273 DeclarationName Name, 1274 SourceLocation NameLoc, 1275 const TemplateArgumentListInfo *TemplateArgs = 0); 1276 1277 /// \brief Retrieve the name that this expression refers to. 1278 DeclarationName getDeclName() const { return Name; } 1279 1280 /// \brief Retrieve the location of the name within the expression. 1281 SourceLocation getLocation() const { return Loc; } 1282 1283 /// \brief Retrieve the source range of the nested-name-specifier. 1284 SourceRange getQualifierRange() const { return QualifierRange; } 1285 1286 /// \brief Retrieve the nested-name-specifier that qualifies this 1287 /// declaration. 1288 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1289 1290 /// Determines whether this lookup had explicit template arguments. 1291 bool hasExplicitTemplateArgs() const { return HasExplicitTemplateArgs; } 1292 1293 // Note that, inconsistently with the explicit-template-argument AST 1294 // nodes, users are *forbidden* from calling these methods on objects 1295 // without explicit template arguments. 1296 1297 /// Gets a reference to the explicit template argument list. 1298 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1299 assert(hasExplicitTemplateArgs()); 1300 return *reinterpret_cast<const ExplicitTemplateArgumentList*>(this + 1); 1301 } 1302 1303 /// \brief Copies the template arguments (if present) into the given 1304 /// structure. 1305 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1306 getExplicitTemplateArgs().copyInto(List); 1307 } 1308 1309 SourceLocation getLAngleLoc() const { 1310 return getExplicitTemplateArgs().LAngleLoc; 1311 } 1312 1313 SourceLocation getRAngleLoc() const { 1314 return getExplicitTemplateArgs().RAngleLoc; 1315 } 1316 1317 TemplateArgumentLoc const *getTemplateArgs() const { 1318 return getExplicitTemplateArgs().getTemplateArgs(); 1319 } 1320 1321 unsigned getNumTemplateArgs() const { 1322 return getExplicitTemplateArgs().NumTemplateArgs; 1323 } 1324 1325 virtual SourceRange getSourceRange() const { 1326 SourceRange Range(QualifierRange.getBegin(), getLocation()); 1327 if (hasExplicitTemplateArgs()) 1328 Range.setEnd(getRAngleLoc()); 1329 return Range; 1330 } 1331 1332 static bool classof(const Stmt *T) { 1333 return T->getStmtClass() == DependentScopeDeclRefExprClass; 1334 } 1335 static bool classof(const DependentScopeDeclRefExpr *) { return true; } 1336 1337 virtual StmtIterator child_begin(); 1338 virtual StmtIterator child_end(); 1339}; 1340 1341class CXXExprWithTemporaries : public Expr { 1342 Stmt *SubExpr; 1343 1344 CXXTemporary **Temps; 1345 unsigned NumTemps; 1346 1347 CXXExprWithTemporaries(Expr *SubExpr, CXXTemporary **Temps, 1348 unsigned NumTemps); 1349 ~CXXExprWithTemporaries(); 1350 1351protected: 1352 virtual void DoDestroy(ASTContext &C); 1353 1354public: 1355 static CXXExprWithTemporaries *Create(ASTContext &C, Expr *SubExpr, 1356 CXXTemporary **Temps, 1357 unsigned NumTemps); 1358 1359 unsigned getNumTemporaries() const { return NumTemps; } 1360 CXXTemporary *getTemporary(unsigned i) { 1361 assert(i < NumTemps && "Index out of range"); 1362 return Temps[i]; 1363 } 1364 const CXXTemporary *getTemporary(unsigned i) const { 1365 return const_cast<CXXExprWithTemporaries*>(this)->getTemporary(i); 1366 } 1367 1368 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 1369 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 1370 void setSubExpr(Expr *E) { SubExpr = E; } 1371 1372 virtual SourceRange getSourceRange() const { 1373 return SubExpr->getSourceRange(); 1374 } 1375 1376 // Implement isa/cast/dyncast/etc. 1377 static bool classof(const Stmt *T) { 1378 return T->getStmtClass() == CXXExprWithTemporariesClass; 1379 } 1380 static bool classof(const CXXExprWithTemporaries *) { return true; } 1381 1382 // Iterators 1383 virtual child_iterator child_begin(); 1384 virtual child_iterator child_end(); 1385}; 1386 1387/// \brief Describes an explicit type conversion that uses functional 1388/// notion but could not be resolved because one or more arguments are 1389/// type-dependent. 1390/// 1391/// The explicit type conversions expressed by 1392/// CXXUnresolvedConstructExpr have the form \c T(a1, a2, ..., aN), 1393/// where \c T is some type and \c a1, a2, ..., aN are values, and 1394/// either \C T is a dependent type or one or more of the \c a's is 1395/// type-dependent. For example, this would occur in a template such 1396/// as: 1397/// 1398/// \code 1399/// template<typename T, typename A1> 1400/// inline T make_a(const A1& a1) { 1401/// return T(a1); 1402/// } 1403/// \endcode 1404/// 1405/// When the returned expression is instantiated, it may resolve to a 1406/// constructor call, conversion function call, or some kind of type 1407/// conversion. 1408class CXXUnresolvedConstructExpr : public Expr { 1409 /// \brief The starting location of the type 1410 SourceLocation TyBeginLoc; 1411 1412 /// \brief The type being constructed. 1413 QualType Type; 1414 1415 /// \brief The location of the left parentheses ('('). 1416 SourceLocation LParenLoc; 1417 1418 /// \brief The location of the right parentheses (')'). 1419 SourceLocation RParenLoc; 1420 1421 /// \brief The number of arguments used to construct the type. 1422 unsigned NumArgs; 1423 1424 CXXUnresolvedConstructExpr(SourceLocation TyBegin, 1425 QualType T, 1426 SourceLocation LParenLoc, 1427 Expr **Args, 1428 unsigned NumArgs, 1429 SourceLocation RParenLoc); 1430 1431public: 1432 static CXXUnresolvedConstructExpr *Create(ASTContext &C, 1433 SourceLocation TyBegin, 1434 QualType T, 1435 SourceLocation LParenLoc, 1436 Expr **Args, 1437 unsigned NumArgs, 1438 SourceLocation RParenLoc); 1439 1440 /// \brief Retrieve the source location where the type begins. 1441 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 1442 void setTypeBeginLoc(SourceLocation L) { TyBeginLoc = L; } 1443 1444 /// \brief Retrieve the type that is being constructed, as specified 1445 /// in the source code. 1446 QualType getTypeAsWritten() const { return Type; } 1447 void setTypeAsWritten(QualType T) { Type = T; } 1448 1449 /// \brief Retrieve the location of the left parentheses ('(') that 1450 /// precedes the argument list. 1451 SourceLocation getLParenLoc() const { return LParenLoc; } 1452 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 1453 1454 /// \brief Retrieve the location of the right parentheses (')') that 1455 /// follows the argument list. 1456 SourceLocation getRParenLoc() const { return RParenLoc; } 1457 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1458 1459 /// \brief Retrieve the number of arguments. 1460 unsigned arg_size() const { return NumArgs; } 1461 1462 typedef Expr** arg_iterator; 1463 arg_iterator arg_begin() { return reinterpret_cast<Expr**>(this + 1); } 1464 arg_iterator arg_end() { return arg_begin() + NumArgs; } 1465 1466 Expr *getArg(unsigned I) { 1467 assert(I < NumArgs && "Argument index out-of-range"); 1468 return *(arg_begin() + I); 1469 } 1470 1471 virtual SourceRange getSourceRange() const { 1472 return SourceRange(TyBeginLoc, RParenLoc); 1473 } 1474 static bool classof(const Stmt *T) { 1475 return T->getStmtClass() == CXXUnresolvedConstructExprClass; 1476 } 1477 static bool classof(const CXXUnresolvedConstructExpr *) { return true; } 1478 1479 // Iterators 1480 virtual child_iterator child_begin(); 1481 virtual child_iterator child_end(); 1482}; 1483 1484/// \brief Represents a C++ member access expression where the actual 1485/// member referenced could not be resolved because the base 1486/// expression or the member name was dependent. 1487/// 1488/// Like UnresolvedMemberExprs, these can be either implicit or 1489/// explicit accesses. It is only possible to get one of these with 1490/// an implicit access if a qualifier is provided. 1491class CXXDependentScopeMemberExpr : public Expr { 1492 /// \brief The expression for the base pointer or class reference, 1493 /// e.g., the \c x in x.f. Can be null in implicit accesses. 1494 Stmt *Base; 1495 1496 /// \brief The type of the base expression. Never null, even for 1497 /// implicit accesses. 1498 QualType BaseType; 1499 1500 /// \brief Whether this member expression used the '->' operator or 1501 /// the '.' operator. 1502 bool IsArrow : 1; 1503 1504 /// \brief Whether this member expression has explicitly-specified template 1505 /// arguments. 1506 bool HasExplicitTemplateArgs : 1; 1507 1508 /// \brief The location of the '->' or '.' operator. 1509 SourceLocation OperatorLoc; 1510 1511 /// \brief The nested-name-specifier that precedes the member name, if any. 1512 NestedNameSpecifier *Qualifier; 1513 1514 /// \brief The source range covering the nested name specifier. 1515 SourceRange QualifierRange; 1516 1517 /// \brief In a qualified member access expression such as t->Base::f, this 1518 /// member stores the resolves of name lookup in the context of the member 1519 /// access expression, to be used at instantiation time. 1520 /// 1521 /// FIXME: This member, along with the Qualifier and QualifierRange, could 1522 /// be stuck into a structure that is optionally allocated at the end of 1523 /// the CXXDependentScopeMemberExpr, to save space in the common case. 1524 NamedDecl *FirstQualifierFoundInScope; 1525 1526 /// \brief The member to which this member expression refers, which 1527 /// can be name, overloaded operator, or destructor. 1528 /// FIXME: could also be a template-id 1529 DeclarationName Member; 1530 1531 /// \brief The location of the member name. 1532 SourceLocation MemberLoc; 1533 1534 /// \brief Retrieve the explicit template argument list that followed the 1535 /// member template name, if any. 1536 ExplicitTemplateArgumentList *getExplicitTemplateArgumentList() { 1537 assert(HasExplicitTemplateArgs); 1538 return reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 1539 } 1540 1541 /// \brief Retrieve the explicit template argument list that followed the 1542 /// member template name, if any. 1543 const ExplicitTemplateArgumentList *getExplicitTemplateArgumentList() const { 1544 return const_cast<CXXDependentScopeMemberExpr *>(this) 1545 ->getExplicitTemplateArgumentList(); 1546 } 1547 1548 CXXDependentScopeMemberExpr(ASTContext &C, 1549 Expr *Base, QualType BaseType, bool IsArrow, 1550 SourceLocation OperatorLoc, 1551 NestedNameSpecifier *Qualifier, 1552 SourceRange QualifierRange, 1553 NamedDecl *FirstQualifierFoundInScope, 1554 DeclarationName Member, 1555 SourceLocation MemberLoc, 1556 const TemplateArgumentListInfo *TemplateArgs); 1557 1558public: 1559 CXXDependentScopeMemberExpr(ASTContext &C, 1560 Expr *Base, QualType BaseType, 1561 bool IsArrow, 1562 SourceLocation OperatorLoc, 1563 NestedNameSpecifier *Qualifier, 1564 SourceRange QualifierRange, 1565 NamedDecl *FirstQualifierFoundInScope, 1566 DeclarationName Member, 1567 SourceLocation MemberLoc) 1568 : Expr(CXXDependentScopeMemberExprClass, C.DependentTy, true, true), 1569 Base(Base), BaseType(BaseType), IsArrow(IsArrow), 1570 HasExplicitTemplateArgs(false), OperatorLoc(OperatorLoc), 1571 Qualifier(Qualifier), QualifierRange(QualifierRange), 1572 FirstQualifierFoundInScope(FirstQualifierFoundInScope), 1573 Member(Member), MemberLoc(MemberLoc) { } 1574 1575 static CXXDependentScopeMemberExpr * 1576 Create(ASTContext &C, 1577 Expr *Base, QualType BaseType, bool IsArrow, 1578 SourceLocation OperatorLoc, 1579 NestedNameSpecifier *Qualifier, 1580 SourceRange QualifierRange, 1581 NamedDecl *FirstQualifierFoundInScope, 1582 DeclarationName Member, 1583 SourceLocation MemberLoc, 1584 const TemplateArgumentListInfo *TemplateArgs); 1585 1586 /// \brief True if this is an implicit access, i.e. one in which the 1587 /// member being accessed was not written in the source. The source 1588 /// location of the operator is invalid in this case. 1589 bool isImplicitAccess() const { return Base == 0; } 1590 1591 /// \brief Retrieve the base object of this member expressions, 1592 /// e.g., the \c x in \c x.m. 1593 Expr *getBase() const { 1594 assert(!isImplicitAccess()); 1595 return cast<Expr>(Base); 1596 } 1597 void setBase(Expr *E) { Base = E; } 1598 1599 QualType getBaseType() const { return BaseType; } 1600 1601 /// \brief Determine whether this member expression used the '->' 1602 /// operator; otherwise, it used the '.' operator. 1603 bool isArrow() const { return IsArrow; } 1604 void setArrow(bool A) { IsArrow = A; } 1605 1606 /// \brief Retrieve the location of the '->' or '.' operator. 1607 SourceLocation getOperatorLoc() const { return OperatorLoc; } 1608 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 1609 1610 /// \brief Retrieve the nested-name-specifier that qualifies the member 1611 /// name. 1612 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1613 1614 /// \brief Retrieve the source range covering the nested-name-specifier 1615 /// that qualifies the member name. 1616 SourceRange getQualifierRange() const { return QualifierRange; } 1617 1618 /// \brief Retrieve the first part of the nested-name-specifier that was 1619 /// found in the scope of the member access expression when the member access 1620 /// was initially parsed. 1621 /// 1622 /// This function only returns a useful result when member access expression 1623 /// uses a qualified member name, e.g., "x.Base::f". Here, the declaration 1624 /// returned by this function describes what was found by unqualified name 1625 /// lookup for the identifier "Base" within the scope of the member access 1626 /// expression itself. At template instantiation time, this information is 1627 /// combined with the results of name lookup into the type of the object 1628 /// expression itself (the class type of x). 1629 NamedDecl *getFirstQualifierFoundInScope() const { 1630 return FirstQualifierFoundInScope; 1631 } 1632 1633 /// \brief Retrieve the name of the member that this expression 1634 /// refers to. 1635 DeclarationName getMember() const { return Member; } 1636 void setMember(DeclarationName N) { Member = N; } 1637 1638 // \brief Retrieve the location of the name of the member that this 1639 // expression refers to. 1640 SourceLocation getMemberLoc() const { return MemberLoc; } 1641 void setMemberLoc(SourceLocation L) { MemberLoc = L; } 1642 1643 /// \brief Determines whether this member expression actually had a C++ 1644 /// template argument list explicitly specified, e.g., x.f<int>. 1645 bool hasExplicitTemplateArgs() const { 1646 return HasExplicitTemplateArgs; 1647 } 1648 1649 /// \brief Copies the template arguments (if present) into the given 1650 /// structure. 1651 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1652 assert(HasExplicitTemplateArgs); 1653 getExplicitTemplateArgumentList()->copyInto(List); 1654 } 1655 1656 /// \brief Retrieve the location of the left angle bracket following the 1657 /// member name ('<'), if any. 1658 SourceLocation getLAngleLoc() const { 1659 assert(HasExplicitTemplateArgs); 1660 return getExplicitTemplateArgumentList()->LAngleLoc; 1661 } 1662 1663 /// \brief Retrieve the template arguments provided as part of this 1664 /// template-id. 1665 const TemplateArgumentLoc *getTemplateArgs() const { 1666 assert(HasExplicitTemplateArgs); 1667 return getExplicitTemplateArgumentList()->getTemplateArgs(); 1668 } 1669 1670 /// \brief Retrieve the number of template arguments provided as part of this 1671 /// template-id. 1672 unsigned getNumTemplateArgs() const { 1673 assert(HasExplicitTemplateArgs); 1674 return getExplicitTemplateArgumentList()->NumTemplateArgs; 1675 } 1676 1677 /// \brief Retrieve the location of the right angle bracket following the 1678 /// template arguments ('>'). 1679 SourceLocation getRAngleLoc() const { 1680 assert(HasExplicitTemplateArgs); 1681 return getExplicitTemplateArgumentList()->RAngleLoc; 1682 } 1683 1684 virtual SourceRange getSourceRange() const { 1685 SourceRange Range; 1686 if (!isImplicitAccess()) 1687 Range.setBegin(Base->getSourceRange().getBegin()); 1688 else if (getQualifier()) 1689 Range.setBegin(getQualifierRange().getBegin()); 1690 else 1691 Range.setBegin(MemberLoc); 1692 1693 if (hasExplicitTemplateArgs()) 1694 Range.setEnd(getRAngleLoc()); 1695 else 1696 Range.setEnd(MemberLoc); 1697 return Range; 1698 } 1699 1700 static bool classof(const Stmt *T) { 1701 return T->getStmtClass() == CXXDependentScopeMemberExprClass; 1702 } 1703 static bool classof(const CXXDependentScopeMemberExpr *) { return true; } 1704 1705 // Iterators 1706 virtual child_iterator child_begin(); 1707 virtual child_iterator child_end(); 1708}; 1709 1710/// \brief Represents a C++ member access expression for which lookup 1711/// produced a set of overloaded functions. 1712/// 1713/// The member access may be explicit or implicit: 1714/// struct A { 1715/// int a, b; 1716/// int explicitAccess() { return this->a + this->A::b; } 1717/// int implicitAccess() { return a + A::b; } 1718/// }; 1719/// 1720/// In the final AST, an explicit access always becomes a MemberExpr. 1721/// An implicit access may become either a MemberExpr or a 1722/// DeclRefExpr, depending on whether the member is static. 1723class UnresolvedMemberExpr : public Expr { 1724 /// The results. These are undesugared, which is to say, they may 1725 /// include UsingShadowDecls. 1726 UnresolvedSet<4> Results; 1727 1728 /// \brief The expression for the base pointer or class reference, 1729 /// e.g., the \c x in x.f. This can be null if this is an 'unbased' 1730 /// member expression 1731 Stmt *Base; 1732 1733 /// \brief The type of the base expression; never null. 1734 QualType BaseType; 1735 1736 /// \brief Whether this member expression used the '->' operator or 1737 /// the '.' operator. 1738 bool IsArrow : 1; 1739 1740 /// \brief Whether the lookup results contain an unresolved using 1741 /// declaration. 1742 bool HasUnresolvedUsing : 1; 1743 1744 /// \brief Whether this member expression has explicitly-specified template 1745 /// arguments. 1746 bool HasExplicitTemplateArgs : 1; 1747 1748 /// \brief The location of the '->' or '.' operator. 1749 SourceLocation OperatorLoc; 1750 1751 /// \brief The nested-name-specifier that precedes the member name, if any. 1752 NestedNameSpecifier *Qualifier; 1753 1754 /// \brief The source range covering the nested name specifier. 1755 SourceRange QualifierRange; 1756 1757 /// \brief The member to which this member expression refers, which 1758 /// can be a name or an overloaded operator. 1759 DeclarationName MemberName; 1760 1761 /// \brief The location of the member name. 1762 SourceLocation MemberLoc; 1763 1764 /// \brief Retrieve the explicit template argument list that followed the 1765 /// member template name. 1766 ExplicitTemplateArgumentList *getExplicitTemplateArgs() { 1767 assert(HasExplicitTemplateArgs); 1768 return reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 1769 } 1770 1771 /// \brief Retrieve the explicit template argument list that followed the 1772 /// member template name, if any. 1773 const ExplicitTemplateArgumentList *getExplicitTemplateArgs() const { 1774 return const_cast<UnresolvedMemberExpr*>(this)->getExplicitTemplateArgs(); 1775 } 1776 1777 UnresolvedMemberExpr(QualType T, bool Dependent, 1778 bool HasUnresolvedUsing, 1779 Expr *Base, QualType BaseType, bool IsArrow, 1780 SourceLocation OperatorLoc, 1781 NestedNameSpecifier *Qualifier, 1782 SourceRange QualifierRange, 1783 DeclarationName Member, 1784 SourceLocation MemberLoc, 1785 const TemplateArgumentListInfo *TemplateArgs); 1786 1787public: 1788 static UnresolvedMemberExpr * 1789 Create(ASTContext &C, bool Dependent, bool HasUnresolvedUsing, 1790 Expr *Base, QualType BaseType, bool IsArrow, 1791 SourceLocation OperatorLoc, 1792 NestedNameSpecifier *Qualifier, 1793 SourceRange QualifierRange, 1794 DeclarationName Member, 1795 SourceLocation MemberLoc, 1796 const TemplateArgumentListInfo *TemplateArgs); 1797 1798 /// Adds a declaration to the unresolved set. By assumption, all of 1799 /// these happen at initialization time and properties like 1800 /// 'Dependent' and 'HasUnresolvedUsing' take them into account. 1801 void addDecl(NamedDecl *Decl) { 1802 Results.addDecl(Decl); 1803 } 1804 1805 typedef UnresolvedSetImpl::iterator decls_iterator; 1806 decls_iterator decls_begin() const { return Results.begin(); } 1807 decls_iterator decls_end() const { return Results.end(); } 1808 1809 unsigned getNumDecls() const { return Results.size(); } 1810 1811 /// Retrieves the decls as an unresolved set. 1812 const UnresolvedSetImpl &getDecls() { return Results; } 1813 1814 /// \brief True if this is an implicit access, i.e. one in which the 1815 /// member being accessed was not written in the source. The source 1816 /// location of the operator is invalid in this case. 1817 bool isImplicitAccess() const { return Base == 0; } 1818 1819 /// \brief Retrieve the base object of this member expressions, 1820 /// e.g., the \c x in \c x.m. 1821 Expr *getBase() { 1822 assert(!isImplicitAccess()); 1823 return cast<Expr>(Base); 1824 } 1825 void setBase(Expr *E) { Base = E; } 1826 1827 QualType getBaseType() const { return BaseType; } 1828 1829 /// \brief Determine whether this member expression used the '->' 1830 /// operator; otherwise, it used the '.' operator. 1831 bool isArrow() const { return IsArrow; } 1832 void setArrow(bool A) { IsArrow = A; } 1833 1834 /// \brief Retrieve the location of the '->' or '.' operator. 1835 SourceLocation getOperatorLoc() const { return OperatorLoc; } 1836 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 1837 1838 /// \brief Retrieve the nested-name-specifier that qualifies the member 1839 /// name. 1840 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1841 1842 /// \brief Retrieve the source range covering the nested-name-specifier 1843 /// that qualifies the member name. 1844 SourceRange getQualifierRange() const { return QualifierRange; } 1845 1846 /// \brief Retrieve the name of the member that this expression 1847 /// refers to. 1848 DeclarationName getMemberName() const { return MemberName; } 1849 void setMemberName(DeclarationName N) { MemberName = N; } 1850 1851 // \brief Retrieve the location of the name of the member that this 1852 // expression refers to. 1853 SourceLocation getMemberLoc() const { return MemberLoc; } 1854 void setMemberLoc(SourceLocation L) { MemberLoc = L; } 1855 1856 /// \brief Determines whether this member expression actually had a C++ 1857 /// template argument list explicitly specified, e.g., x.f<int>. 1858 bool hasExplicitTemplateArgs() const { 1859 return HasExplicitTemplateArgs; 1860 } 1861 1862 /// \brief Copies the template arguments into the given structure. 1863 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1864 getExplicitTemplateArgs()->copyInto(List); 1865 } 1866 1867 /// \brief Retrieve the location of the left angle bracket following 1868 /// the member name ('<'). 1869 SourceLocation getLAngleLoc() const { 1870 return getExplicitTemplateArgs()->LAngleLoc; 1871 } 1872 1873 /// \brief Retrieve the template arguments provided as part of this 1874 /// template-id. 1875 const TemplateArgumentLoc *getTemplateArgs() const { 1876 return getExplicitTemplateArgs()->getTemplateArgs(); 1877 } 1878 1879 /// \brief Retrieve the number of template arguments provided as 1880 /// part of this template-id. 1881 unsigned getNumTemplateArgs() const { 1882 return getExplicitTemplateArgs()->NumTemplateArgs; 1883 } 1884 1885 /// \brief Retrieve the location of the right angle bracket 1886 /// following the template arguments ('>'). 1887 SourceLocation getRAngleLoc() const { 1888 return getExplicitTemplateArgs()->RAngleLoc; 1889 } 1890 1891 virtual SourceRange getSourceRange() const { 1892 SourceRange Range; 1893 if (!isImplicitAccess()) 1894 Range.setBegin(Base->getSourceRange().getBegin()); 1895 else if (getQualifier()) 1896 Range.setBegin(getQualifierRange().getBegin()); 1897 else 1898 Range.setBegin(MemberLoc); 1899 1900 if (hasExplicitTemplateArgs()) 1901 Range.setEnd(getRAngleLoc()); 1902 else 1903 Range.setEnd(MemberLoc); 1904 return Range; 1905 } 1906 1907 static bool classof(const Stmt *T) { 1908 return T->getStmtClass() == UnresolvedMemberExprClass; 1909 } 1910 static bool classof(const UnresolvedMemberExpr *) { return true; } 1911 1912 // Iterators 1913 virtual child_iterator child_begin(); 1914 virtual child_iterator child_end(); 1915}; 1916 1917} // end namespace clang 1918 1919#endif 1920