ExprCXX.h revision 1817bd483b538fd3f4530649f5cb900bad9e8a76
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 CXXMemberCallExpr(ASTContext &C, EmptyShell Empty) 96 : CallExpr(C, CXXMemberCallExprClass, Empty) { } 97 98 /// getImplicitObjectArgument - Retrieves the implicit object 99 /// argument for the member call. For example, in "x.f(5)", this 100 /// operation would return "x". 101 Expr *getImplicitObjectArgument(); 102 103 virtual SourceRange getSourceRange() const; 104 105 static bool classof(const Stmt *T) { 106 return T->getStmtClass() == CXXMemberCallExprClass; 107 } 108 static bool classof(const CXXMemberCallExpr *) { return true; } 109}; 110 111/// CXXNamedCastExpr - Abstract class common to all of the C++ "named" 112/// casts, @c static_cast, @c dynamic_cast, @c reinterpret_cast, or @c 113/// const_cast. 114/// 115/// This abstract class is inherited by all of the classes 116/// representing "named" casts, e.g., CXXStaticCastExpr, 117/// CXXDynamicCastExpr, CXXReinterpretCastExpr, and CXXConstCastExpr. 118class CXXNamedCastExpr : public ExplicitCastExpr { 119private: 120 SourceLocation Loc; // the location of the casting op 121 122protected: 123 CXXNamedCastExpr(StmtClass SC, QualType ty, CastKind kind, Expr *op, 124 CXXBaseSpecifierArray BasePath, TypeSourceInfo *writtenTy, 125 SourceLocation l) 126 : ExplicitCastExpr(SC, ty, kind, op, BasePath, writtenTy), Loc(l) {} 127 128 explicit CXXNamedCastExpr(StmtClass SC, EmptyShell Shell) 129 : ExplicitCastExpr(SC, Shell) { } 130 131public: 132 const char *getCastName() const; 133 134 /// \brief Retrieve the location of the cast operator keyword, e.g., 135 /// "static_cast". 136 SourceLocation getOperatorLoc() const { return Loc; } 137 void setOperatorLoc(SourceLocation L) { Loc = L; } 138 139 virtual SourceRange getSourceRange() const { 140 return SourceRange(Loc, getSubExpr()->getSourceRange().getEnd()); 141 } 142 static bool classof(const Stmt *T) { 143 switch (T->getStmtClass()) { 144 case CXXStaticCastExprClass: 145 case CXXDynamicCastExprClass: 146 case CXXReinterpretCastExprClass: 147 case CXXConstCastExprClass: 148 return true; 149 default: 150 return false; 151 } 152 } 153 static bool classof(const CXXNamedCastExpr *) { return true; } 154}; 155 156/// CXXStaticCastExpr - A C++ @c static_cast expression (C++ [expr.static.cast]). 157/// 158/// This expression node represents a C++ static cast, e.g., 159/// @c static_cast<int>(1.0). 160class CXXStaticCastExpr : public CXXNamedCastExpr { 161public: 162 CXXStaticCastExpr(QualType ty, CastKind kind, Expr *op, 163 CXXBaseSpecifierArray BasePath, TypeSourceInfo *writtenTy, 164 SourceLocation l) 165 : CXXNamedCastExpr(CXXStaticCastExprClass, ty, kind, op, BasePath, writtenTy, l) {} 166 167 explicit CXXStaticCastExpr(EmptyShell Empty) 168 : CXXNamedCastExpr(CXXStaticCastExprClass, Empty) { } 169 170 static bool classof(const Stmt *T) { 171 return T->getStmtClass() == CXXStaticCastExprClass; 172 } 173 static bool classof(const CXXStaticCastExpr *) { return true; } 174}; 175 176/// CXXDynamicCastExpr - A C++ @c dynamic_cast expression 177/// (C++ [expr.dynamic.cast]), which may perform a run-time check to 178/// determine how to perform the type cast. 179/// 180/// This expression node represents a dynamic cast, e.g., 181/// @c dynamic_cast<Derived*>(BasePtr). 182class CXXDynamicCastExpr : public CXXNamedCastExpr { 183public: 184 CXXDynamicCastExpr(QualType ty, CastKind kind, Expr *op, 185 CXXBaseSpecifierArray BasePath, TypeSourceInfo *writtenTy, 186 SourceLocation l) 187 : CXXNamedCastExpr(CXXDynamicCastExprClass, ty, kind, op, BasePath, 188 writtenTy, l) {} 189 190 explicit CXXDynamicCastExpr(EmptyShell Empty) 191 : CXXNamedCastExpr(CXXDynamicCastExprClass, Empty) { } 192 193 static bool classof(const Stmt *T) { 194 return T->getStmtClass() == CXXDynamicCastExprClass; 195 } 196 static bool classof(const CXXDynamicCastExpr *) { return true; } 197}; 198 199/// CXXReinterpretCastExpr - A C++ @c reinterpret_cast expression (C++ 200/// [expr.reinterpret.cast]), which provides a differently-typed view 201/// of a value but performs no actual work at run time. 202/// 203/// This expression node represents a reinterpret cast, e.g., 204/// @c reinterpret_cast<int>(VoidPtr). 205class CXXReinterpretCastExpr : public CXXNamedCastExpr { 206public: 207 CXXReinterpretCastExpr(QualType ty, CastKind kind, Expr *op, 208 CXXBaseSpecifierArray BasePath, 209 TypeSourceInfo *writtenTy, SourceLocation l) 210 : CXXNamedCastExpr(CXXReinterpretCastExprClass, ty, kind, op, BasePath, 211 writtenTy, l) {} 212 213 explicit CXXReinterpretCastExpr(EmptyShell Empty) 214 : CXXNamedCastExpr(CXXReinterpretCastExprClass, Empty) { } 215 216 static bool classof(const Stmt *T) { 217 return T->getStmtClass() == CXXReinterpretCastExprClass; 218 } 219 static bool classof(const CXXReinterpretCastExpr *) { return true; } 220}; 221 222/// CXXConstCastExpr - A C++ @c const_cast expression (C++ [expr.const.cast]), 223/// which can remove type qualifiers but does not change the underlying value. 224/// 225/// This expression node represents a const cast, e.g., 226/// @c const_cast<char*>(PtrToConstChar). 227class CXXConstCastExpr : public CXXNamedCastExpr { 228public: 229 CXXConstCastExpr(QualType ty, Expr *op, TypeSourceInfo *writtenTy, 230 SourceLocation l) 231 : CXXNamedCastExpr(CXXConstCastExprClass, ty, CK_NoOp, op, 232 CXXBaseSpecifierArray(), writtenTy, l) {} 233 234 explicit CXXConstCastExpr(EmptyShell Empty) 235 : CXXNamedCastExpr(CXXConstCastExprClass, Empty) { } 236 237 static bool classof(const Stmt *T) { 238 return T->getStmtClass() == CXXConstCastExprClass; 239 } 240 static bool classof(const CXXConstCastExpr *) { return true; } 241}; 242 243/// CXXBoolLiteralExpr - [C++ 2.13.5] C++ Boolean Literal. 244/// 245class CXXBoolLiteralExpr : public Expr { 246 bool Value; 247 SourceLocation Loc; 248public: 249 CXXBoolLiteralExpr(bool val, QualType Ty, SourceLocation l) : 250 Expr(CXXBoolLiteralExprClass, Ty, false, false), Value(val), Loc(l) {} 251 252 explicit CXXBoolLiteralExpr(EmptyShell Empty) 253 : Expr(CXXBoolLiteralExprClass, Empty) { } 254 255 bool getValue() const { return Value; } 256 void setValue(bool V) { Value = V; } 257 258 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 259 260 SourceLocation getLocation() const { return Loc; } 261 void setLocation(SourceLocation L) { Loc = L; } 262 263 static bool classof(const Stmt *T) { 264 return T->getStmtClass() == CXXBoolLiteralExprClass; 265 } 266 static bool classof(const CXXBoolLiteralExpr *) { return true; } 267 268 // Iterators 269 virtual child_iterator child_begin(); 270 virtual child_iterator child_end(); 271}; 272 273/// CXXNullPtrLiteralExpr - [C++0x 2.14.7] C++ Pointer Literal 274class CXXNullPtrLiteralExpr : public Expr { 275 SourceLocation Loc; 276public: 277 CXXNullPtrLiteralExpr(QualType Ty, SourceLocation l) : 278 Expr(CXXNullPtrLiteralExprClass, Ty, false, false), Loc(l) {} 279 280 explicit CXXNullPtrLiteralExpr(EmptyShell Empty) 281 : Expr(CXXNullPtrLiteralExprClass, Empty) { } 282 283 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 284 285 SourceLocation getLocation() const { return Loc; } 286 void setLocation(SourceLocation L) { Loc = L; } 287 288 static bool classof(const Stmt *T) { 289 return T->getStmtClass() == CXXNullPtrLiteralExprClass; 290 } 291 static bool classof(const CXXNullPtrLiteralExpr *) { return true; } 292 293 virtual child_iterator child_begin(); 294 virtual child_iterator child_end(); 295}; 296 297/// CXXTypeidExpr - A C++ @c typeid expression (C++ [expr.typeid]), which gets 298/// the type_info that corresponds to the supplied type, or the (possibly 299/// dynamic) type of the supplied expression. 300/// 301/// This represents code like @c typeid(int) or @c typeid(*objPtr) 302class CXXTypeidExpr : public Expr { 303private: 304 llvm::PointerUnion<Stmt *, TypeSourceInfo *> Operand; 305 SourceRange Range; 306 307public: 308 CXXTypeidExpr(QualType Ty, TypeSourceInfo *Operand, SourceRange R) 309 : Expr(CXXTypeidExprClass, Ty, 310 // typeid is never type-dependent (C++ [temp.dep.expr]p4) 311 false, 312 // typeid is value-dependent if the type or expression are dependent 313 Operand->getType()->isDependentType()), 314 Operand(Operand), Range(R) { } 315 316 CXXTypeidExpr(QualType Ty, Expr *Operand, SourceRange R) 317 : Expr(CXXTypeidExprClass, Ty, 318 // typeid is never type-dependent (C++ [temp.dep.expr]p4) 319 false, 320 // typeid is value-dependent if the type or expression are dependent 321 Operand->isTypeDependent() || Operand->isValueDependent()), 322 Operand(Operand), Range(R) { } 323 324 bool isTypeOperand() const { return Operand.is<TypeSourceInfo *>(); } 325 326 /// \brief Retrieves the type operand of this typeid() expression after 327 /// various required adjustments (removing reference types, cv-qualifiers). 328 QualType getTypeOperand() const; 329 330 /// \brief Retrieve source information for the type operand. 331 TypeSourceInfo *getTypeOperandSourceInfo() const { 332 assert(isTypeOperand() && "Cannot call getTypeOperand for typeid(expr)"); 333 return Operand.get<TypeSourceInfo *>(); 334 } 335 336 Expr* getExprOperand() const { 337 assert(!isTypeOperand() && "Cannot call getExprOperand for typeid(type)"); 338 return static_cast<Expr*>(Operand.get<Stmt *>()); 339 } 340 341 virtual SourceRange getSourceRange() const { 342 return Range; 343 } 344 static bool classof(const Stmt *T) { 345 return T->getStmtClass() == CXXTypeidExprClass; 346 } 347 static bool classof(const CXXTypeidExpr *) { return true; } 348 349 // Iterators 350 virtual child_iterator child_begin(); 351 virtual child_iterator child_end(); 352}; 353 354/// CXXThisExpr - Represents the "this" expression in C++, which is a 355/// pointer to the object on which the current member function is 356/// executing (C++ [expr.prim]p3). Example: 357/// 358/// @code 359/// class Foo { 360/// public: 361/// void bar(); 362/// void test() { this->bar(); } 363/// }; 364/// @endcode 365class CXXThisExpr : public Expr { 366 SourceLocation Loc; 367 bool Implicit : 1; 368 369public: 370 CXXThisExpr(SourceLocation L, QualType Type, bool isImplicit) 371 : Expr(CXXThisExprClass, Type, 372 // 'this' is type-dependent if the class type of the enclosing 373 // member function is dependent (C++ [temp.dep.expr]p2) 374 Type->isDependentType(), Type->isDependentType()), 375 Loc(L), Implicit(isImplicit) { } 376 377 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 378 379 bool isImplicit() const { return Implicit; } 380 void setImplicit(bool I) { Implicit = I; } 381 382 static bool classof(const Stmt *T) { 383 return T->getStmtClass() == CXXThisExprClass; 384 } 385 static bool classof(const CXXThisExpr *) { return true; } 386 387 // Iterators 388 virtual child_iterator child_begin(); 389 virtual child_iterator child_end(); 390}; 391 392/// CXXThrowExpr - [C++ 15] C++ Throw Expression. This handles 393/// 'throw' and 'throw' assignment-expression. When 394/// assignment-expression isn't present, Op will be null. 395/// 396class CXXThrowExpr : public Expr { 397 Stmt *Op; 398 SourceLocation ThrowLoc; 399public: 400 // Ty is the void type which is used as the result type of the 401 // exepression. The l is the location of the throw keyword. expr 402 // can by null, if the optional expression to throw isn't present. 403 CXXThrowExpr(Expr *expr, QualType Ty, SourceLocation l) : 404 Expr(CXXThrowExprClass, Ty, false, false), Op(expr), ThrowLoc(l) {} 405 const Expr *getSubExpr() const { return cast_or_null<Expr>(Op); } 406 Expr *getSubExpr() { return cast_or_null<Expr>(Op); } 407 void setSubExpr(Expr *E) { Op = E; } 408 409 SourceLocation getThrowLoc() const { return ThrowLoc; } 410 void setThrowLoc(SourceLocation L) { ThrowLoc = L; } 411 412 virtual SourceRange getSourceRange() const { 413 if (getSubExpr() == 0) 414 return SourceRange(ThrowLoc, ThrowLoc); 415 return SourceRange(ThrowLoc, getSubExpr()->getSourceRange().getEnd()); 416 } 417 418 static bool classof(const Stmt *T) { 419 return T->getStmtClass() == CXXThrowExprClass; 420 } 421 static bool classof(const CXXThrowExpr *) { return true; } 422 423 // Iterators 424 virtual child_iterator child_begin(); 425 virtual child_iterator child_end(); 426}; 427 428/// CXXDefaultArgExpr - C++ [dcl.fct.default]. This wraps up a 429/// function call argument that was created from the corresponding 430/// parameter's default argument, when the call did not explicitly 431/// supply arguments for all of the parameters. 432class CXXDefaultArgExpr : public Expr { 433 /// \brief The parameter whose default is being used. 434 /// 435 /// When the bit is set, the subexpression is stored after the 436 /// CXXDefaultArgExpr itself. When the bit is clear, the parameter's 437 /// actual default expression is the subexpression. 438 llvm::PointerIntPair<ParmVarDecl *, 1, bool> Param; 439 440 /// \brief The location where the default argument expression was used. 441 SourceLocation Loc; 442 443protected: 444 CXXDefaultArgExpr(StmtClass SC, SourceLocation Loc, ParmVarDecl *param) 445 : Expr(SC, 446 param->hasUnparsedDefaultArg() 447 ? param->getType().getNonReferenceType() 448 : param->getDefaultArg()->getType(), 449 false, false), 450 Param(param, false), Loc(Loc) { } 451 452 CXXDefaultArgExpr(StmtClass SC, SourceLocation Loc, ParmVarDecl *param, 453 Expr *SubExpr) 454 : Expr(SC, SubExpr->getType(), false, false), Param(param, true), Loc(Loc) 455 { 456 *reinterpret_cast<Expr **>(this + 1) = SubExpr; 457 } 458 459protected: 460 virtual void DoDestroy(ASTContext &C); 461 462public: 463 // Param is the parameter whose default argument is used by this 464 // expression. 465 static CXXDefaultArgExpr *Create(ASTContext &C, SourceLocation Loc, 466 ParmVarDecl *Param) { 467 return new (C) CXXDefaultArgExpr(CXXDefaultArgExprClass, Loc, Param); 468 } 469 470 // Param is the parameter whose default argument is used by this 471 // expression, and SubExpr is the expression that will actually be used. 472 static CXXDefaultArgExpr *Create(ASTContext &C, 473 SourceLocation Loc, 474 ParmVarDecl *Param, 475 Expr *SubExpr); 476 477 // Retrieve the parameter that the argument was created from. 478 const ParmVarDecl *getParam() const { return Param.getPointer(); } 479 ParmVarDecl *getParam() { return Param.getPointer(); } 480 481 // Retrieve the actual argument to the function call. 482 const Expr *getExpr() const { 483 if (Param.getInt()) 484 return *reinterpret_cast<Expr const * const*> (this + 1); 485 return getParam()->getDefaultArg(); 486 } 487 Expr *getExpr() { 488 if (Param.getInt()) 489 return *reinterpret_cast<Expr **> (this + 1); 490 return getParam()->getDefaultArg(); 491 } 492 493 /// \brief Retrieve the location where this default argument was actually 494 /// used. 495 SourceLocation getUsedLocation() const { return Loc; } 496 497 virtual SourceRange getSourceRange() const { 498 // Default argument expressions have no representation in the 499 // source, so they have an empty source range. 500 return SourceRange(); 501 } 502 503 static bool classof(const Stmt *T) { 504 return T->getStmtClass() == CXXDefaultArgExprClass; 505 } 506 static bool classof(const CXXDefaultArgExpr *) { return true; } 507 508 // Iterators 509 virtual child_iterator child_begin(); 510 virtual child_iterator child_end(); 511}; 512 513/// CXXTemporary - Represents a C++ temporary. 514class CXXTemporary { 515 /// Destructor - The destructor that needs to be called. 516 const CXXDestructorDecl *Destructor; 517 518 CXXTemporary(const CXXDestructorDecl *destructor) 519 : Destructor(destructor) { } 520 ~CXXTemporary() { } 521 522public: 523 static CXXTemporary *Create(ASTContext &C, 524 const CXXDestructorDecl *Destructor); 525 526 void Destroy(ASTContext &Ctx); 527 528 const CXXDestructorDecl *getDestructor() const { return Destructor; } 529}; 530 531/// CXXBindTemporaryExpr - Represents binding an expression to a temporary, 532/// so its destructor can be called later. 533class CXXBindTemporaryExpr : public Expr { 534 CXXTemporary *Temp; 535 536 Stmt *SubExpr; 537 538 CXXBindTemporaryExpr(CXXTemporary *temp, Expr* subexpr) 539 : Expr(CXXBindTemporaryExprClass, subexpr->getType(), false, false), 540 Temp(temp), SubExpr(subexpr) { } 541 ~CXXBindTemporaryExpr() { } 542 543protected: 544 virtual void DoDestroy(ASTContext &C); 545 546public: 547 static CXXBindTemporaryExpr *Create(ASTContext &C, CXXTemporary *Temp, 548 Expr* SubExpr); 549 550 CXXTemporary *getTemporary() { return Temp; } 551 const CXXTemporary *getTemporary() const { return Temp; } 552 553 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 554 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 555 void setSubExpr(Expr *E) { SubExpr = E; } 556 557 virtual SourceRange getSourceRange() const { 558 return SubExpr->getSourceRange(); 559 } 560 561 // Implement isa/cast/dyncast/etc. 562 static bool classof(const Stmt *T) { 563 return T->getStmtClass() == CXXBindTemporaryExprClass; 564 } 565 static bool classof(const CXXBindTemporaryExpr *) { return true; } 566 567 // Iterators 568 virtual child_iterator child_begin(); 569 virtual child_iterator child_end(); 570}; 571 572/// CXXBindReferenceExpr - Represents binding an expression to a reference. 573/// In the example: 574/// 575/// const int &i = 10; 576/// 577/// a bind reference expression is inserted to indicate that 10 is bound to 578/// a reference. (Ans also that a temporary needs to be created to hold the 579/// value). 580class CXXBindReferenceExpr : public Expr { 581 // SubExpr - The expression being bound. 582 Stmt *SubExpr; 583 584 // ExtendsLifetime - Whether binding this reference extends the lifetime of 585 // the expression being bound. FIXME: Add C++ reference. 586 bool ExtendsLifetime; 587 588 /// RequiresTemporaryCopy - Whether binding the subexpression requires a 589 /// temporary copy. 590 bool RequiresTemporaryCopy; 591 592 CXXBindReferenceExpr(Expr *subexpr, bool ExtendsLifetime, 593 bool RequiresTemporaryCopy) 594 : Expr(CXXBindReferenceExprClass, subexpr->getType(), false, false), 595 SubExpr(subexpr), ExtendsLifetime(ExtendsLifetime), 596 RequiresTemporaryCopy(RequiresTemporaryCopy) { } 597 ~CXXBindReferenceExpr() { } 598 599protected: 600 virtual void DoDestroy(ASTContext &C); 601 602public: 603 static CXXBindReferenceExpr *Create(ASTContext &C, Expr *SubExpr, 604 bool ExtendsLifetime, 605 bool RequiresTemporaryCopy); 606 607 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 608 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 609 void setSubExpr(Expr *E) { SubExpr = E; } 610 611 virtual SourceRange getSourceRange() const { 612 return SubExpr->getSourceRange(); 613 } 614 615 /// requiresTemporaryCopy - Whether binding the subexpression requires a 616 /// temporary copy. 617 bool requiresTemporaryCopy() const { return RequiresTemporaryCopy; } 618 619 // extendsLifetime - Whether binding this reference extends the lifetime of 620 // the expression being bound. FIXME: Add C++ reference. 621 bool extendsLifetime() { return ExtendsLifetime; } 622 623 // Implement isa/cast/dyncast/etc. 624 static bool classof(const Stmt *T) { 625 return T->getStmtClass() == CXXBindReferenceExprClass; 626 } 627 static bool classof(const CXXBindReferenceExpr *) { return true; } 628 629 // Iterators 630 virtual child_iterator child_begin(); 631 virtual child_iterator child_end(); 632}; 633 634/// CXXConstructExpr - Represents a call to a C++ constructor. 635class CXXConstructExpr : public Expr { 636public: 637 enum ConstructionKind { 638 CK_Complete, 639 CK_NonVirtualBase, 640 CK_VirtualBase 641 }; 642 643private: 644 CXXConstructorDecl *Constructor; 645 646 SourceLocation Loc; 647 bool Elidable : 1; 648 bool ZeroInitialization : 1; 649 unsigned ConstructKind : 2; 650 Stmt **Args; 651 unsigned NumArgs; 652 653protected: 654 CXXConstructExpr(ASTContext &C, StmtClass SC, QualType T, 655 SourceLocation Loc, 656 CXXConstructorDecl *d, bool elidable, 657 Expr **args, unsigned numargs, 658 bool ZeroInitialization = false, 659 ConstructionKind ConstructKind = CK_Complete); 660 ~CXXConstructExpr() { } 661 662 virtual void DoDestroy(ASTContext &C); 663 664public: 665 /// \brief Construct an empty C++ construction expression that will store 666 /// \p numargs arguments. 667 CXXConstructExpr(EmptyShell Empty, ASTContext &C, unsigned numargs); 668 669 static CXXConstructExpr *Create(ASTContext &C, QualType T, 670 SourceLocation Loc, 671 CXXConstructorDecl *D, bool Elidable, 672 Expr **Args, unsigned NumArgs, 673 bool ZeroInitialization = false, 674 ConstructionKind ConstructKind = CK_Complete); 675 676 677 CXXConstructorDecl* getConstructor() const { return Constructor; } 678 void setConstructor(CXXConstructorDecl *C) { Constructor = C; } 679 680 SourceLocation getLocation() const { return Loc; } 681 void setLocation(SourceLocation Loc) { this->Loc = Loc; } 682 683 /// \brief Whether this construction is elidable. 684 bool isElidable() const { return Elidable; } 685 void setElidable(bool E) { Elidable = E; } 686 687 /// \brief Whether this construction first requires 688 /// zero-initialization before the initializer is called. 689 bool requiresZeroInitialization() const { return ZeroInitialization; } 690 void setRequiresZeroInitialization(bool ZeroInit) { 691 ZeroInitialization = ZeroInit; 692 } 693 694 /// \brief Determines whether this constructor is actually constructing 695 /// a base class (rather than a complete object). 696 ConstructionKind getConstructionKind() const { 697 return (ConstructionKind)ConstructKind; 698 } 699 void setConstructionKind(ConstructionKind CK) { 700 ConstructKind = CK; 701 } 702 703 typedef ExprIterator arg_iterator; 704 typedef ConstExprIterator const_arg_iterator; 705 706 arg_iterator arg_begin() { return Args; } 707 arg_iterator arg_end() { return Args + NumArgs; } 708 const_arg_iterator arg_begin() const { return Args; } 709 const_arg_iterator arg_end() const { return Args + NumArgs; } 710 711 Expr **getArgs() const { return reinterpret_cast<Expr **>(Args); } 712 unsigned getNumArgs() const { return NumArgs; } 713 714 /// getArg - Return the specified argument. 715 Expr *getArg(unsigned Arg) { 716 assert(Arg < NumArgs && "Arg access out of range!"); 717 return cast<Expr>(Args[Arg]); 718 } 719 const Expr *getArg(unsigned Arg) const { 720 assert(Arg < NumArgs && "Arg access out of range!"); 721 return cast<Expr>(Args[Arg]); 722 } 723 724 /// setArg - Set the specified argument. 725 void setArg(unsigned Arg, Expr *ArgExpr) { 726 assert(Arg < NumArgs && "Arg access out of range!"); 727 Args[Arg] = ArgExpr; 728 } 729 730 virtual SourceRange getSourceRange() const; 731 732 static bool classof(const Stmt *T) { 733 return T->getStmtClass() == CXXConstructExprClass || 734 T->getStmtClass() == CXXTemporaryObjectExprClass; 735 } 736 static bool classof(const CXXConstructExpr *) { return true; } 737 738 // Iterators 739 virtual child_iterator child_begin(); 740 virtual child_iterator child_end(); 741}; 742 743/// CXXFunctionalCastExpr - Represents an explicit C++ type conversion 744/// that uses "functional" notion (C++ [expr.type.conv]). Example: @c 745/// x = int(0.5); 746class CXXFunctionalCastExpr : public ExplicitCastExpr { 747 SourceLocation TyBeginLoc; 748 SourceLocation RParenLoc; 749public: 750 CXXFunctionalCastExpr(QualType ty, TypeSourceInfo *writtenTy, 751 SourceLocation tyBeginLoc, CastKind kind, 752 Expr *castExpr, CXXBaseSpecifierArray BasePath, 753 SourceLocation rParenLoc) 754 : ExplicitCastExpr(CXXFunctionalCastExprClass, ty, kind, castExpr, 755 BasePath, writtenTy), 756 TyBeginLoc(tyBeginLoc), RParenLoc(rParenLoc) {} 757 758 explicit CXXFunctionalCastExpr(EmptyShell Shell) 759 : ExplicitCastExpr(CXXFunctionalCastExprClass, Shell) { } 760 761 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 762 void setTypeBeginLoc(SourceLocation L) { TyBeginLoc = L; } 763 SourceLocation getRParenLoc() const { return RParenLoc; } 764 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 765 766 virtual SourceRange getSourceRange() const { 767 return SourceRange(TyBeginLoc, RParenLoc); 768 } 769 static bool classof(const Stmt *T) { 770 return T->getStmtClass() == CXXFunctionalCastExprClass; 771 } 772 static bool classof(const CXXFunctionalCastExpr *) { return true; } 773}; 774 775/// @brief Represents a C++ functional cast expression that builds a 776/// temporary object. 777/// 778/// This expression type represents a C++ "functional" cast 779/// (C++[expr.type.conv]) with N != 1 arguments that invokes a 780/// constructor to build a temporary object. If N == 0 but no 781/// constructor will be called (because the functional cast is 782/// performing a value-initialized an object whose class type has no 783/// user-declared constructors), CXXZeroInitValueExpr will represent 784/// the functional cast. Finally, with N == 1 arguments the functional 785/// cast expression will be represented by CXXFunctionalCastExpr. 786/// Example: 787/// @code 788/// struct X { X(int, float); } 789/// 790/// X create_X() { 791/// return X(1, 3.14f); // creates a CXXTemporaryObjectExpr 792/// }; 793/// @endcode 794class CXXTemporaryObjectExpr : public CXXConstructExpr { 795 SourceLocation TyBeginLoc; 796 SourceLocation RParenLoc; 797 798public: 799 CXXTemporaryObjectExpr(ASTContext &C, CXXConstructorDecl *Cons, 800 QualType writtenTy, SourceLocation tyBeginLoc, 801 Expr **Args,unsigned NumArgs, 802 SourceLocation rParenLoc, 803 bool ZeroInitialization = false); 804 805 ~CXXTemporaryObjectExpr() { } 806 807 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 808 SourceLocation getRParenLoc() const { return RParenLoc; } 809 810 virtual SourceRange getSourceRange() const { 811 return SourceRange(TyBeginLoc, RParenLoc); 812 } 813 static bool classof(const Stmt *T) { 814 return T->getStmtClass() == CXXTemporaryObjectExprClass; 815 } 816 static bool classof(const CXXTemporaryObjectExpr *) { return true; } 817}; 818 819/// CXXZeroInitValueExpr - [C++ 5.2.3p2] 820/// Expression "T()" which creates a value-initialized rvalue of type 821/// T, which is either a non-class type or a class type without any 822/// user-defined constructors. 823/// 824class CXXZeroInitValueExpr : public Expr { 825 SourceLocation TyBeginLoc; 826 SourceLocation RParenLoc; 827 828public: 829 CXXZeroInitValueExpr(QualType ty, SourceLocation tyBeginLoc, 830 SourceLocation rParenLoc ) : 831 Expr(CXXZeroInitValueExprClass, ty, false, false), 832 TyBeginLoc(tyBeginLoc), RParenLoc(rParenLoc) {} 833 834 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 835 SourceLocation getRParenLoc() const { return RParenLoc; } 836 837 /// @brief Whether this initialization expression was 838 /// implicitly-generated. 839 bool isImplicit() const { 840 return TyBeginLoc.isInvalid() && RParenLoc.isInvalid(); 841 } 842 843 virtual SourceRange getSourceRange() const { 844 return SourceRange(TyBeginLoc, RParenLoc); 845 } 846 847 static bool classof(const Stmt *T) { 848 return T->getStmtClass() == CXXZeroInitValueExprClass; 849 } 850 static bool classof(const CXXZeroInitValueExpr *) { return true; } 851 852 // Iterators 853 virtual child_iterator child_begin(); 854 virtual child_iterator child_end(); 855}; 856 857/// CXXNewExpr - A new expression for memory allocation and constructor calls, 858/// e.g: "new CXXNewExpr(foo)". 859class CXXNewExpr : public Expr { 860 // Was the usage ::new, i.e. is the global new to be used? 861 bool GlobalNew : 1; 862 // Was the form (type-id) used? Otherwise, it was new-type-id. 863 bool ParenTypeId : 1; 864 // Is there an initializer? If not, built-ins are uninitialized, else they're 865 // value-initialized. 866 bool Initializer : 1; 867 // Do we allocate an array? If so, the first SubExpr is the size expression. 868 bool Array : 1; 869 // The number of placement new arguments. 870 unsigned NumPlacementArgs : 14; 871 // The number of constructor arguments. This may be 1 even for non-class 872 // types; use the pseudo copy constructor. 873 unsigned NumConstructorArgs : 14; 874 // Contains an optional array size expression, any number of optional 875 // placement arguments, and any number of optional constructor arguments, 876 // in that order. 877 Stmt **SubExprs; 878 // Points to the allocation function used. 879 FunctionDecl *OperatorNew; 880 // Points to the deallocation function used in case of error. May be null. 881 FunctionDecl *OperatorDelete; 882 // Points to the constructor used. Cannot be null if AllocType is a record; 883 // it would still point at the default constructor (even an implicit one). 884 // Must be null for all other types. 885 CXXConstructorDecl *Constructor; 886 887 SourceLocation StartLoc; 888 SourceLocation EndLoc; 889 890public: 891 CXXNewExpr(ASTContext &C, bool globalNew, FunctionDecl *operatorNew, 892 Expr **placementArgs, unsigned numPlaceArgs, bool ParenTypeId, 893 Expr *arraySize, CXXConstructorDecl *constructor, bool initializer, 894 Expr **constructorArgs, unsigned numConsArgs, 895 FunctionDecl *operatorDelete, QualType ty, 896 SourceLocation startLoc, SourceLocation endLoc); 897 898 virtual void DoDestroy(ASTContext &C); 899 900 QualType getAllocatedType() const { 901 assert(getType()->isPointerType()); 902 return getType()->getAs<PointerType>()->getPointeeType(); 903 } 904 905 FunctionDecl *getOperatorNew() const { return OperatorNew; } 906 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 907 CXXConstructorDecl *getConstructor() const { return Constructor; } 908 909 bool isArray() const { return Array; } 910 Expr *getArraySize() { 911 return Array ? cast<Expr>(SubExprs[0]) : 0; 912 } 913 const Expr *getArraySize() const { 914 return Array ? cast<Expr>(SubExprs[0]) : 0; 915 } 916 917 unsigned getNumPlacementArgs() const { return NumPlacementArgs; } 918 Expr *getPlacementArg(unsigned i) { 919 assert(i < NumPlacementArgs && "Index out of range"); 920 return cast<Expr>(SubExprs[Array + i]); 921 } 922 const Expr *getPlacementArg(unsigned i) const { 923 assert(i < NumPlacementArgs && "Index out of range"); 924 return cast<Expr>(SubExprs[Array + i]); 925 } 926 927 bool isGlobalNew() const { return GlobalNew; } 928 bool isParenTypeId() const { return ParenTypeId; } 929 bool hasInitializer() const { return Initializer; } 930 931 unsigned getNumConstructorArgs() const { return NumConstructorArgs; } 932 Expr *getConstructorArg(unsigned i) { 933 assert(i < NumConstructorArgs && "Index out of range"); 934 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 935 } 936 const Expr *getConstructorArg(unsigned i) const { 937 assert(i < NumConstructorArgs && "Index out of range"); 938 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 939 } 940 941 typedef ExprIterator arg_iterator; 942 typedef ConstExprIterator const_arg_iterator; 943 944 arg_iterator placement_arg_begin() { 945 return SubExprs + Array; 946 } 947 arg_iterator placement_arg_end() { 948 return SubExprs + Array + getNumPlacementArgs(); 949 } 950 const_arg_iterator placement_arg_begin() const { 951 return SubExprs + Array; 952 } 953 const_arg_iterator placement_arg_end() const { 954 return SubExprs + Array + getNumPlacementArgs(); 955 } 956 957 arg_iterator constructor_arg_begin() { 958 return SubExprs + Array + getNumPlacementArgs(); 959 } 960 arg_iterator constructor_arg_end() { 961 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 962 } 963 const_arg_iterator constructor_arg_begin() const { 964 return SubExprs + Array + getNumPlacementArgs(); 965 } 966 const_arg_iterator constructor_arg_end() const { 967 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 968 } 969 970 virtual SourceRange getSourceRange() const { 971 return SourceRange(StartLoc, EndLoc); 972 } 973 974 static bool classof(const Stmt *T) { 975 return T->getStmtClass() == CXXNewExprClass; 976 } 977 static bool classof(const CXXNewExpr *) { return true; } 978 979 // Iterators 980 virtual child_iterator child_begin(); 981 virtual child_iterator child_end(); 982}; 983 984/// CXXDeleteExpr - A delete expression for memory deallocation and destructor 985/// calls, e.g. "delete[] pArray". 986class CXXDeleteExpr : public Expr { 987 // Is this a forced global delete, i.e. "::delete"? 988 bool GlobalDelete : 1; 989 // Is this the array form of delete, i.e. "delete[]"? 990 bool ArrayForm : 1; 991 // Points to the operator delete overload that is used. Could be a member. 992 FunctionDecl *OperatorDelete; 993 // The pointer expression to be deleted. 994 Stmt *Argument; 995 // Location of the expression. 996 SourceLocation Loc; 997public: 998 CXXDeleteExpr(QualType ty, bool globalDelete, bool arrayForm, 999 FunctionDecl *operatorDelete, Expr *arg, SourceLocation loc) 1000 : Expr(CXXDeleteExprClass, ty, false, false), GlobalDelete(globalDelete), 1001 ArrayForm(arrayForm), OperatorDelete(operatorDelete), Argument(arg), 1002 Loc(loc) { } 1003 1004 bool isGlobalDelete() const { return GlobalDelete; } 1005 bool isArrayForm() const { return ArrayForm; } 1006 1007 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 1008 1009 Expr *getArgument() { return cast<Expr>(Argument); } 1010 const Expr *getArgument() const { return cast<Expr>(Argument); } 1011 1012 virtual SourceRange getSourceRange() const { 1013 return SourceRange(Loc, Argument->getLocEnd()); 1014 } 1015 1016 static bool classof(const Stmt *T) { 1017 return T->getStmtClass() == CXXDeleteExprClass; 1018 } 1019 static bool classof(const CXXDeleteExpr *) { return true; } 1020 1021 // Iterators 1022 virtual child_iterator child_begin(); 1023 virtual child_iterator child_end(); 1024}; 1025 1026/// \brief Structure used to store the type being destroyed by a 1027/// pseudo-destructor expression. 1028class PseudoDestructorTypeStorage { 1029 /// \brief Either the type source information or the name of the type, if 1030 /// it couldn't be resolved due to type-dependence. 1031 llvm::PointerUnion<TypeSourceInfo *, IdentifierInfo *> Type; 1032 1033 /// \brief The starting source location of the pseudo-destructor type. 1034 SourceLocation Location; 1035 1036public: 1037 PseudoDestructorTypeStorage() { } 1038 1039 PseudoDestructorTypeStorage(IdentifierInfo *II, SourceLocation Loc) 1040 : Type(II), Location(Loc) { } 1041 1042 PseudoDestructorTypeStorage(TypeSourceInfo *Info); 1043 1044 TypeSourceInfo *getTypeSourceInfo() const { 1045 return Type.dyn_cast<TypeSourceInfo *>(); 1046 } 1047 1048 IdentifierInfo *getIdentifier() const { 1049 return Type.dyn_cast<IdentifierInfo *>(); 1050 } 1051 1052 SourceLocation getLocation() const { return Location; } 1053}; 1054 1055/// \brief Represents a C++ pseudo-destructor (C++ [expr.pseudo]). 1056/// 1057/// A pseudo-destructor is an expression that looks like a member access to a 1058/// destructor of a scalar type, except that scalar types don't have 1059/// destructors. For example: 1060/// 1061/// \code 1062/// typedef int T; 1063/// void f(int *p) { 1064/// p->T::~T(); 1065/// } 1066/// \endcode 1067/// 1068/// Pseudo-destructors typically occur when instantiating templates such as: 1069/// 1070/// \code 1071/// template<typename T> 1072/// void destroy(T* ptr) { 1073/// ptr->T::~T(); 1074/// } 1075/// \endcode 1076/// 1077/// for scalar types. A pseudo-destructor expression has no run-time semantics 1078/// beyond evaluating the base expression. 1079class CXXPseudoDestructorExpr : public Expr { 1080 /// \brief The base expression (that is being destroyed). 1081 Stmt *Base; 1082 1083 /// \brief Whether the operator was an arrow ('->'); otherwise, it was a 1084 /// period ('.'). 1085 bool IsArrow : 1; 1086 1087 /// \brief The location of the '.' or '->' operator. 1088 SourceLocation OperatorLoc; 1089 1090 /// \brief The nested-name-specifier that follows the operator, if present. 1091 NestedNameSpecifier *Qualifier; 1092 1093 /// \brief The source range that covers the nested-name-specifier, if 1094 /// present. 1095 SourceRange QualifierRange; 1096 1097 /// \brief The type that precedes the '::' in a qualified pseudo-destructor 1098 /// expression. 1099 TypeSourceInfo *ScopeType; 1100 1101 /// \brief The location of the '::' in a qualified pseudo-destructor 1102 /// expression. 1103 SourceLocation ColonColonLoc; 1104 1105 /// \brief The location of the '~'. 1106 SourceLocation TildeLoc; 1107 1108 /// \brief The type being destroyed, or its name if we were unable to 1109 /// resolve the name. 1110 PseudoDestructorTypeStorage DestroyedType; 1111 1112public: 1113 CXXPseudoDestructorExpr(ASTContext &Context, 1114 Expr *Base, bool isArrow, SourceLocation OperatorLoc, 1115 NestedNameSpecifier *Qualifier, 1116 SourceRange QualifierRange, 1117 TypeSourceInfo *ScopeType, 1118 SourceLocation ColonColonLoc, 1119 SourceLocation TildeLoc, 1120 PseudoDestructorTypeStorage DestroyedType) 1121 : Expr(CXXPseudoDestructorExprClass, 1122 Context.getPointerType(Context.getFunctionType(Context.VoidTy, 0, 0, 1123 false, 0, false, 1124 false, 0, 0, 1125 FunctionType::ExtInfo())), 1126 /*isTypeDependent=*/(Base->isTypeDependent() || 1127 (DestroyedType.getTypeSourceInfo() && 1128 DestroyedType.getTypeSourceInfo()->getType()->isDependentType())), 1129 /*isValueDependent=*/Base->isValueDependent()), 1130 Base(static_cast<Stmt *>(Base)), IsArrow(isArrow), 1131 OperatorLoc(OperatorLoc), Qualifier(Qualifier), 1132 QualifierRange(QualifierRange), 1133 ScopeType(ScopeType), ColonColonLoc(ColonColonLoc), TildeLoc(TildeLoc), 1134 DestroyedType(DestroyedType) { } 1135 1136 void setBase(Expr *E) { Base = E; } 1137 Expr *getBase() const { return cast<Expr>(Base); } 1138 1139 /// \brief Determines whether this member expression actually had 1140 /// a C++ nested-name-specifier prior to the name of the member, e.g., 1141 /// x->Base::foo. 1142 bool hasQualifier() const { return Qualifier != 0; } 1143 1144 /// \brief If the member name was qualified, retrieves the source range of 1145 /// the nested-name-specifier that precedes the member name. Otherwise, 1146 /// returns an empty source range. 1147 SourceRange getQualifierRange() const { return QualifierRange; } 1148 1149 /// \brief If the member name was qualified, retrieves the 1150 /// nested-name-specifier that precedes the member name. Otherwise, returns 1151 /// NULL. 1152 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1153 1154 /// \brief Determine whether this pseudo-destructor expression was written 1155 /// using an '->' (otherwise, it used a '.'). 1156 bool isArrow() const { return IsArrow; } 1157 void setArrow(bool A) { IsArrow = A; } 1158 1159 /// \brief Retrieve the location of the '.' or '->' operator. 1160 SourceLocation getOperatorLoc() const { return OperatorLoc; } 1161 1162 /// \brief Retrieve the scope type in a qualified pseudo-destructor 1163 /// expression. 1164 /// 1165 /// Pseudo-destructor expressions can have extra qualification within them 1166 /// that is not part of the nested-name-specifier, e.g., \c p->T::~T(). 1167 /// Here, if the object type of the expression is (or may be) a scalar type, 1168 /// \p T may also be a scalar type and, therefore, cannot be part of a 1169 /// nested-name-specifier. It is stored as the "scope type" of the pseudo- 1170 /// destructor expression. 1171 TypeSourceInfo *getScopeTypeInfo() const { return ScopeType; } 1172 1173 /// \brief Retrieve the location of the '::' in a qualified pseudo-destructor 1174 /// expression. 1175 SourceLocation getColonColonLoc() const { return ColonColonLoc; } 1176 1177 /// \brief Retrieve the location of the '~'. 1178 SourceLocation getTildeLoc() const { return TildeLoc; } 1179 1180 /// \brief Retrieve the source location information for the type 1181 /// being destroyed. 1182 /// 1183 /// This type-source information is available for non-dependent 1184 /// pseudo-destructor expressions and some dependent pseudo-destructor 1185 /// expressions. Returns NULL if we only have the identifier for a 1186 /// dependent pseudo-destructor expression. 1187 TypeSourceInfo *getDestroyedTypeInfo() const { 1188 return DestroyedType.getTypeSourceInfo(); 1189 } 1190 1191 /// \brief In a dependent pseudo-destructor expression for which we do not 1192 /// have full type information on the destroyed type, provides the name 1193 /// of the destroyed type. 1194 IdentifierInfo *getDestroyedTypeIdentifier() const { 1195 return DestroyedType.getIdentifier(); 1196 } 1197 1198 /// \brief Retrieve the type being destroyed. 1199 QualType getDestroyedType() const; 1200 1201 /// \brief Retrieve the starting location of the type being destroyed. 1202 SourceLocation getDestroyedTypeLoc() const { 1203 return DestroyedType.getLocation(); 1204 } 1205 1206 virtual SourceRange getSourceRange() const; 1207 1208 static bool classof(const Stmt *T) { 1209 return T->getStmtClass() == CXXPseudoDestructorExprClass; 1210 } 1211 static bool classof(const CXXPseudoDestructorExpr *) { return true; } 1212 1213 // Iterators 1214 virtual child_iterator child_begin(); 1215 virtual child_iterator child_end(); 1216}; 1217 1218/// UnaryTypeTraitExpr - A GCC or MS unary type trait, as used in the 1219/// implementation of TR1/C++0x type trait templates. 1220/// Example: 1221/// __is_pod(int) == true 1222/// __is_enum(std::string) == false 1223class UnaryTypeTraitExpr : public Expr { 1224 /// UTT - The trait. 1225 UnaryTypeTrait UTT; 1226 1227 /// Loc - The location of the type trait keyword. 1228 SourceLocation Loc; 1229 1230 /// RParen - The location of the closing paren. 1231 SourceLocation RParen; 1232 1233 /// QueriedType - The type we're testing. 1234 QualType QueriedType; 1235 1236public: 1237 UnaryTypeTraitExpr(SourceLocation loc, UnaryTypeTrait utt, QualType queried, 1238 SourceLocation rparen, QualType ty) 1239 : Expr(UnaryTypeTraitExprClass, ty, false, queried->isDependentType()), 1240 UTT(utt), Loc(loc), RParen(rparen), QueriedType(queried) { } 1241 1242 virtual SourceRange getSourceRange() const { return SourceRange(Loc, RParen);} 1243 1244 UnaryTypeTrait getTrait() const { return UTT; } 1245 1246 QualType getQueriedType() const { return QueriedType; } 1247 1248 bool EvaluateTrait(ASTContext&) const; 1249 1250 static bool classof(const Stmt *T) { 1251 return T->getStmtClass() == UnaryTypeTraitExprClass; 1252 } 1253 static bool classof(const UnaryTypeTraitExpr *) { return true; } 1254 1255 // Iterators 1256 virtual child_iterator child_begin(); 1257 virtual child_iterator child_end(); 1258}; 1259 1260/// \brief A reference to an overloaded function set, either an 1261/// \t UnresolvedLookupExpr or an \t UnresolvedMemberExpr. 1262class OverloadExpr : public Expr { 1263 /// The results. These are undesugared, which is to say, they may 1264 /// include UsingShadowDecls. Access is relative to the naming 1265 /// class. 1266 UnresolvedSet<4> Results; 1267 1268 /// The common name of these declarations. 1269 DeclarationName Name; 1270 1271 /// The scope specifier, if any. 1272 NestedNameSpecifier *Qualifier; 1273 1274 /// The source range of the scope specifier. 1275 SourceRange QualifierRange; 1276 1277 /// The location of the name. 1278 SourceLocation NameLoc; 1279 1280 /// True if the name was a template-id. 1281 bool HasExplicitTemplateArgs; 1282 1283protected: 1284 OverloadExpr(StmtClass K, QualType T, bool Dependent, 1285 NestedNameSpecifier *Qualifier, SourceRange QRange, 1286 DeclarationName Name, SourceLocation NameLoc, 1287 bool HasTemplateArgs) 1288 : Expr(K, T, Dependent, Dependent), 1289 Name(Name), Qualifier(Qualifier), QualifierRange(QRange), 1290 NameLoc(NameLoc), HasExplicitTemplateArgs(HasTemplateArgs) 1291 {} 1292 1293public: 1294 /// Computes whether an unresolved lookup on the given declarations 1295 /// and optional template arguments is type- and value-dependent. 1296 static bool ComputeDependence(UnresolvedSetIterator Begin, 1297 UnresolvedSetIterator End, 1298 const TemplateArgumentListInfo *Args); 1299 1300 /// Finds the overloaded expression in the given expression of 1301 /// OverloadTy. 1302 /// 1303 /// \return the expression (which must be there) and true if it is 1304 /// within an address-of operator. 1305 static llvm::PointerIntPair<OverloadExpr*,1> find(Expr *E) { 1306 assert(E->getType()->isSpecificBuiltinType(BuiltinType::Overload)); 1307 1308 bool op = false; 1309 E = E->IgnoreParens(); 1310 if (isa<UnaryOperator>(E)) 1311 op = true, E = cast<UnaryOperator>(E)->getSubExpr()->IgnoreParens(); 1312 return llvm::PointerIntPair<OverloadExpr*,1>(cast<OverloadExpr>(E), op); 1313 } 1314 1315 void addDecls(UnresolvedSetIterator Begin, UnresolvedSetIterator End) { 1316 Results.append(Begin, End); 1317 } 1318 1319 /// Gets the naming class of this lookup, if any. 1320 CXXRecordDecl *getNamingClass() const; 1321 1322 typedef UnresolvedSetImpl::iterator decls_iterator; 1323 decls_iterator decls_begin() const { return Results.begin(); } 1324 decls_iterator decls_end() const { return Results.end(); } 1325 1326 /// Gets the decls as an unresolved set. 1327 const UnresolvedSetImpl &getDecls() { return Results; } 1328 1329 /// Gets the number of declarations in the unresolved set. 1330 unsigned getNumDecls() const { return Results.size(); } 1331 1332 /// Gets the name looked up. 1333 DeclarationName getName() const { return Name; } 1334 void setName(DeclarationName N) { Name = N; } 1335 1336 /// Gets the location of the name. 1337 SourceLocation getNameLoc() const { return NameLoc; } 1338 void setNameLoc(SourceLocation Loc) { NameLoc = Loc; } 1339 1340 /// Fetches the nested-name qualifier, if one was given. 1341 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1342 1343 /// Fetches the range of the nested-name qualifier. 1344 SourceRange getQualifierRange() const { return QualifierRange; } 1345 1346 /// \brief Determines whether this expression had an explicit 1347 /// template argument list, e.g. f<int>. 1348 bool hasExplicitTemplateArgs() const { return HasExplicitTemplateArgs; } 1349 1350 ExplicitTemplateArgumentList &getExplicitTemplateArgs(); // defined far below 1351 1352 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1353 return const_cast<OverloadExpr*>(this)->getExplicitTemplateArgs(); 1354 } 1355 1356 ExplicitTemplateArgumentList *getOptionalExplicitTemplateArgs() { 1357 if (hasExplicitTemplateArgs()) 1358 return &getExplicitTemplateArgs(); 1359 return 0; 1360 } 1361 1362 static bool classof(const Stmt *T) { 1363 return T->getStmtClass() == UnresolvedLookupExprClass || 1364 T->getStmtClass() == UnresolvedMemberExprClass; 1365 } 1366 static bool classof(const OverloadExpr *) { return true; } 1367}; 1368 1369/// \brief A reference to a name which we were able to look up during 1370/// parsing but could not resolve to a specific declaration. This 1371/// arises in several ways: 1372/// * we might be waiting for argument-dependent lookup 1373/// * the name might resolve to an overloaded function 1374/// and eventually: 1375/// * the lookup might have included a function template 1376/// These never include UnresolvedUsingValueDecls, which are always 1377/// class members and therefore appear only in 1378/// UnresolvedMemberLookupExprs. 1379class UnresolvedLookupExpr : public OverloadExpr { 1380 /// True if these lookup results should be extended by 1381 /// argument-dependent lookup if this is the operand of a function 1382 /// call. 1383 bool RequiresADL; 1384 1385 /// True if these lookup results are overloaded. This is pretty 1386 /// trivially rederivable if we urgently need to kill this field. 1387 bool Overloaded; 1388 1389 /// The naming class (C++ [class.access.base]p5) of the lookup, if 1390 /// any. This can generally be recalculated from the context chain, 1391 /// but that can be fairly expensive for unqualified lookups. If we 1392 /// want to improve memory use here, this could go in a union 1393 /// against the qualified-lookup bits. 1394 CXXRecordDecl *NamingClass; 1395 1396 UnresolvedLookupExpr(QualType T, bool Dependent, CXXRecordDecl *NamingClass, 1397 NestedNameSpecifier *Qualifier, SourceRange QRange, 1398 DeclarationName Name, SourceLocation NameLoc, 1399 bool RequiresADL, bool Overloaded, bool HasTemplateArgs) 1400 : OverloadExpr(UnresolvedLookupExprClass, T, Dependent, Qualifier, QRange, 1401 Name, NameLoc, HasTemplateArgs), 1402 RequiresADL(RequiresADL), Overloaded(Overloaded), NamingClass(NamingClass) 1403 {} 1404 1405public: 1406 static UnresolvedLookupExpr *Create(ASTContext &C, 1407 bool Dependent, 1408 CXXRecordDecl *NamingClass, 1409 NestedNameSpecifier *Qualifier, 1410 SourceRange QualifierRange, 1411 DeclarationName Name, 1412 SourceLocation NameLoc, 1413 bool ADL, bool Overloaded) { 1414 return new(C) UnresolvedLookupExpr(Dependent ? C.DependentTy : C.OverloadTy, 1415 Dependent, NamingClass, 1416 Qualifier, QualifierRange, 1417 Name, NameLoc, ADL, Overloaded, false); 1418 } 1419 1420 static UnresolvedLookupExpr *Create(ASTContext &C, 1421 bool Dependent, 1422 CXXRecordDecl *NamingClass, 1423 NestedNameSpecifier *Qualifier, 1424 SourceRange QualifierRange, 1425 DeclarationName Name, 1426 SourceLocation NameLoc, 1427 bool ADL, 1428 const TemplateArgumentListInfo &Args); 1429 1430 /// True if this declaration should be extended by 1431 /// argument-dependent lookup. 1432 bool requiresADL() const { return RequiresADL; } 1433 1434 /// True if this lookup is overloaded. 1435 bool isOverloaded() const { return Overloaded; } 1436 1437 /// Gets the 'naming class' (in the sense of C++0x 1438 /// [class.access.base]p5) of the lookup. This is the scope 1439 /// that was looked in to find these results. 1440 CXXRecordDecl *getNamingClass() const { return NamingClass; } 1441 1442 // Note that, inconsistently with the explicit-template-argument AST 1443 // nodes, users are *forbidden* from calling these methods on objects 1444 // without explicit template arguments. 1445 1446 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 1447 assert(hasExplicitTemplateArgs()); 1448 return *reinterpret_cast<ExplicitTemplateArgumentList*>(this + 1); 1449 } 1450 1451 /// Gets a reference to the explicit template argument list. 1452 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1453 assert(hasExplicitTemplateArgs()); 1454 return *reinterpret_cast<const ExplicitTemplateArgumentList*>(this + 1); 1455 } 1456 1457 /// \brief Copies the template arguments (if present) into the given 1458 /// structure. 1459 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1460 getExplicitTemplateArgs().copyInto(List); 1461 } 1462 1463 SourceLocation getLAngleLoc() const { 1464 return getExplicitTemplateArgs().LAngleLoc; 1465 } 1466 1467 SourceLocation getRAngleLoc() const { 1468 return getExplicitTemplateArgs().RAngleLoc; 1469 } 1470 1471 TemplateArgumentLoc const *getTemplateArgs() const { 1472 return getExplicitTemplateArgs().getTemplateArgs(); 1473 } 1474 1475 unsigned getNumTemplateArgs() const { 1476 return getExplicitTemplateArgs().NumTemplateArgs; 1477 } 1478 1479 virtual SourceRange getSourceRange() const { 1480 SourceRange Range(getNameLoc()); 1481 if (getQualifier()) Range.setBegin(getQualifierRange().getBegin()); 1482 if (hasExplicitTemplateArgs()) Range.setEnd(getRAngleLoc()); 1483 return Range; 1484 } 1485 1486 virtual StmtIterator child_begin(); 1487 virtual StmtIterator child_end(); 1488 1489 static bool classof(const Stmt *T) { 1490 return T->getStmtClass() == UnresolvedLookupExprClass; 1491 } 1492 static bool classof(const UnresolvedLookupExpr *) { return true; } 1493}; 1494 1495/// \brief A qualified reference to a name whose declaration cannot 1496/// yet be resolved. 1497/// 1498/// DependentScopeDeclRefExpr is similar to DeclRefExpr in that 1499/// it expresses a reference to a declaration such as 1500/// X<T>::value. The difference, however, is that an 1501/// DependentScopeDeclRefExpr node is used only within C++ templates when 1502/// the qualification (e.g., X<T>::) refers to a dependent type. In 1503/// this case, X<T>::value cannot resolve to a declaration because the 1504/// declaration will differ from on instantiation of X<T> to the 1505/// next. Therefore, DependentScopeDeclRefExpr keeps track of the 1506/// qualifier (X<T>::) and the name of the entity being referenced 1507/// ("value"). Such expressions will instantiate to a DeclRefExpr once the 1508/// declaration can be found. 1509class DependentScopeDeclRefExpr : public Expr { 1510 /// The name of the entity we will be referencing. 1511 DeclarationName Name; 1512 1513 /// Location of the name of the declaration we're referencing. 1514 SourceLocation Loc; 1515 1516 /// QualifierRange - The source range that covers the 1517 /// nested-name-specifier. 1518 SourceRange QualifierRange; 1519 1520 /// \brief The nested-name-specifier that qualifies this unresolved 1521 /// declaration name. 1522 NestedNameSpecifier *Qualifier; 1523 1524 /// \brief Whether the name includes explicit template arguments. 1525 bool HasExplicitTemplateArgs; 1526 1527 DependentScopeDeclRefExpr(QualType T, 1528 NestedNameSpecifier *Qualifier, 1529 SourceRange QualifierRange, 1530 DeclarationName Name, 1531 SourceLocation NameLoc, 1532 bool HasExplicitTemplateArgs) 1533 : Expr(DependentScopeDeclRefExprClass, T, true, true), 1534 Name(Name), Loc(NameLoc), 1535 QualifierRange(QualifierRange), Qualifier(Qualifier), 1536 HasExplicitTemplateArgs(HasExplicitTemplateArgs) 1537 {} 1538 1539public: 1540 static DependentScopeDeclRefExpr *Create(ASTContext &C, 1541 NestedNameSpecifier *Qualifier, 1542 SourceRange QualifierRange, 1543 DeclarationName Name, 1544 SourceLocation NameLoc, 1545 const TemplateArgumentListInfo *TemplateArgs = 0); 1546 1547 /// \brief Retrieve the name that this expression refers to. 1548 DeclarationName getDeclName() const { return Name; } 1549 1550 /// \brief Retrieve the location of the name within the expression. 1551 SourceLocation getLocation() const { return Loc; } 1552 1553 /// \brief Retrieve the source range of the nested-name-specifier. 1554 SourceRange getQualifierRange() const { return QualifierRange; } 1555 1556 /// \brief Retrieve the nested-name-specifier that qualifies this 1557 /// declaration. 1558 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1559 1560 /// Determines whether this lookup had explicit template arguments. 1561 bool hasExplicitTemplateArgs() const { return HasExplicitTemplateArgs; } 1562 1563 // Note that, inconsistently with the explicit-template-argument AST 1564 // nodes, users are *forbidden* from calling these methods on objects 1565 // without explicit template arguments. 1566 1567 /// Gets a reference to the explicit template argument list. 1568 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1569 assert(hasExplicitTemplateArgs()); 1570 return *reinterpret_cast<const ExplicitTemplateArgumentList*>(this + 1); 1571 } 1572 1573 /// \brief Copies the template arguments (if present) into the given 1574 /// structure. 1575 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1576 getExplicitTemplateArgs().copyInto(List); 1577 } 1578 1579 SourceLocation getLAngleLoc() const { 1580 return getExplicitTemplateArgs().LAngleLoc; 1581 } 1582 1583 SourceLocation getRAngleLoc() const { 1584 return getExplicitTemplateArgs().RAngleLoc; 1585 } 1586 1587 TemplateArgumentLoc const *getTemplateArgs() const { 1588 return getExplicitTemplateArgs().getTemplateArgs(); 1589 } 1590 1591 unsigned getNumTemplateArgs() const { 1592 return getExplicitTemplateArgs().NumTemplateArgs; 1593 } 1594 1595 virtual SourceRange getSourceRange() const { 1596 SourceRange Range(QualifierRange.getBegin(), getLocation()); 1597 if (hasExplicitTemplateArgs()) 1598 Range.setEnd(getRAngleLoc()); 1599 return Range; 1600 } 1601 1602 static bool classof(const Stmt *T) { 1603 return T->getStmtClass() == DependentScopeDeclRefExprClass; 1604 } 1605 static bool classof(const DependentScopeDeclRefExpr *) { return true; } 1606 1607 virtual StmtIterator child_begin(); 1608 virtual StmtIterator child_end(); 1609}; 1610 1611class CXXExprWithTemporaries : public Expr { 1612 Stmt *SubExpr; 1613 1614 CXXTemporary **Temps; 1615 unsigned NumTemps; 1616 1617 CXXExprWithTemporaries(Expr *SubExpr, CXXTemporary **Temps, 1618 unsigned NumTemps); 1619 ~CXXExprWithTemporaries(); 1620 1621protected: 1622 virtual void DoDestroy(ASTContext &C); 1623 1624public: 1625 static CXXExprWithTemporaries *Create(ASTContext &C, Expr *SubExpr, 1626 CXXTemporary **Temps, 1627 unsigned NumTemps); 1628 1629 unsigned getNumTemporaries() const { return NumTemps; } 1630 CXXTemporary *getTemporary(unsigned i) { 1631 assert(i < NumTemps && "Index out of range"); 1632 return Temps[i]; 1633 } 1634 const CXXTemporary *getTemporary(unsigned i) const { 1635 return const_cast<CXXExprWithTemporaries*>(this)->getTemporary(i); 1636 } 1637 1638 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 1639 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 1640 void setSubExpr(Expr *E) { SubExpr = E; } 1641 1642 virtual SourceRange getSourceRange() const { 1643 return SubExpr->getSourceRange(); 1644 } 1645 1646 // Implement isa/cast/dyncast/etc. 1647 static bool classof(const Stmt *T) { 1648 return T->getStmtClass() == CXXExprWithTemporariesClass; 1649 } 1650 static bool classof(const CXXExprWithTemporaries *) { return true; } 1651 1652 // Iterators 1653 virtual child_iterator child_begin(); 1654 virtual child_iterator child_end(); 1655}; 1656 1657/// \brief Describes an explicit type conversion that uses functional 1658/// notion but could not be resolved because one or more arguments are 1659/// type-dependent. 1660/// 1661/// The explicit type conversions expressed by 1662/// CXXUnresolvedConstructExpr have the form \c T(a1, a2, ..., aN), 1663/// where \c T is some type and \c a1, a2, ..., aN are values, and 1664/// either \C T is a dependent type or one or more of the \c a's is 1665/// type-dependent. For example, this would occur in a template such 1666/// as: 1667/// 1668/// \code 1669/// template<typename T, typename A1> 1670/// inline T make_a(const A1& a1) { 1671/// return T(a1); 1672/// } 1673/// \endcode 1674/// 1675/// When the returned expression is instantiated, it may resolve to a 1676/// constructor call, conversion function call, or some kind of type 1677/// conversion. 1678class CXXUnresolvedConstructExpr : public Expr { 1679 /// \brief The starting location of the type 1680 SourceLocation TyBeginLoc; 1681 1682 /// \brief The type being constructed. 1683 QualType Type; 1684 1685 /// \brief The location of the left parentheses ('('). 1686 SourceLocation LParenLoc; 1687 1688 /// \brief The location of the right parentheses (')'). 1689 SourceLocation RParenLoc; 1690 1691 /// \brief The number of arguments used to construct the type. 1692 unsigned NumArgs; 1693 1694 CXXUnresolvedConstructExpr(SourceLocation TyBegin, 1695 QualType T, 1696 SourceLocation LParenLoc, 1697 Expr **Args, 1698 unsigned NumArgs, 1699 SourceLocation RParenLoc); 1700 1701public: 1702 static CXXUnresolvedConstructExpr *Create(ASTContext &C, 1703 SourceLocation TyBegin, 1704 QualType T, 1705 SourceLocation LParenLoc, 1706 Expr **Args, 1707 unsigned NumArgs, 1708 SourceLocation RParenLoc); 1709 1710 /// \brief Retrieve the source location where the type begins. 1711 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 1712 void setTypeBeginLoc(SourceLocation L) { TyBeginLoc = L; } 1713 1714 /// \brief Retrieve the type that is being constructed, as specified 1715 /// in the source code. 1716 QualType getTypeAsWritten() const { return Type; } 1717 void setTypeAsWritten(QualType T) { Type = T; } 1718 1719 /// \brief Retrieve the location of the left parentheses ('(') that 1720 /// precedes the argument list. 1721 SourceLocation getLParenLoc() const { return LParenLoc; } 1722 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 1723 1724 /// \brief Retrieve the location of the right parentheses (')') that 1725 /// follows the argument list. 1726 SourceLocation getRParenLoc() const { return RParenLoc; } 1727 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1728 1729 /// \brief Retrieve the number of arguments. 1730 unsigned arg_size() const { return NumArgs; } 1731 1732 typedef Expr** arg_iterator; 1733 arg_iterator arg_begin() { return reinterpret_cast<Expr**>(this + 1); } 1734 arg_iterator arg_end() { return arg_begin() + NumArgs; } 1735 1736 typedef const Expr* const * const_arg_iterator; 1737 const_arg_iterator arg_begin() const { 1738 return reinterpret_cast<const Expr* const *>(this + 1); 1739 } 1740 const_arg_iterator arg_end() const { 1741 return arg_begin() + NumArgs; 1742 } 1743 1744 Expr *getArg(unsigned I) { 1745 assert(I < NumArgs && "Argument index out-of-range"); 1746 return *(arg_begin() + I); 1747 } 1748 1749 const Expr *getArg(unsigned I) const { 1750 assert(I < NumArgs && "Argument index out-of-range"); 1751 return *(arg_begin() + I); 1752 } 1753 1754 virtual SourceRange getSourceRange() const { 1755 return SourceRange(TyBeginLoc, RParenLoc); 1756 } 1757 static bool classof(const Stmt *T) { 1758 return T->getStmtClass() == CXXUnresolvedConstructExprClass; 1759 } 1760 static bool classof(const CXXUnresolvedConstructExpr *) { return true; } 1761 1762 // Iterators 1763 virtual child_iterator child_begin(); 1764 virtual child_iterator child_end(); 1765}; 1766 1767/// \brief Represents a C++ member access expression where the actual 1768/// member referenced could not be resolved because the base 1769/// expression or the member name was dependent. 1770/// 1771/// Like UnresolvedMemberExprs, these can be either implicit or 1772/// explicit accesses. It is only possible to get one of these with 1773/// an implicit access if a qualifier is provided. 1774class CXXDependentScopeMemberExpr : public Expr { 1775 /// \brief The expression for the base pointer or class reference, 1776 /// e.g., the \c x in x.f. Can be null in implicit accesses. 1777 Stmt *Base; 1778 1779 /// \brief The type of the base expression. Never null, even for 1780 /// implicit accesses. 1781 QualType BaseType; 1782 1783 /// \brief Whether this member expression used the '->' operator or 1784 /// the '.' operator. 1785 bool IsArrow : 1; 1786 1787 /// \brief Whether this member expression has explicitly-specified template 1788 /// arguments. 1789 bool HasExplicitTemplateArgs : 1; 1790 1791 /// \brief The location of the '->' or '.' operator. 1792 SourceLocation OperatorLoc; 1793 1794 /// \brief The nested-name-specifier that precedes the member name, if any. 1795 NestedNameSpecifier *Qualifier; 1796 1797 /// \brief The source range covering the nested name specifier. 1798 SourceRange QualifierRange; 1799 1800 /// \brief In a qualified member access expression such as t->Base::f, this 1801 /// member stores the resolves of name lookup in the context of the member 1802 /// access expression, to be used at instantiation time. 1803 /// 1804 /// FIXME: This member, along with the Qualifier and QualifierRange, could 1805 /// be stuck into a structure that is optionally allocated at the end of 1806 /// the CXXDependentScopeMemberExpr, to save space in the common case. 1807 NamedDecl *FirstQualifierFoundInScope; 1808 1809 /// \brief The member to which this member expression refers, which 1810 /// can be name, overloaded operator, or destructor. 1811 /// FIXME: could also be a template-id 1812 DeclarationName Member; 1813 1814 /// \brief The location of the member name. 1815 SourceLocation MemberLoc; 1816 1817 /// \brief Retrieve the explicit template argument list that followed the 1818 /// member template name, if any. 1819 ExplicitTemplateArgumentList *getExplicitTemplateArgumentList() { 1820 assert(HasExplicitTemplateArgs); 1821 return reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 1822 } 1823 1824 /// \brief Retrieve the explicit template argument list that followed the 1825 /// member template name, if any. 1826 const ExplicitTemplateArgumentList *getExplicitTemplateArgumentList() const { 1827 return const_cast<CXXDependentScopeMemberExpr *>(this) 1828 ->getExplicitTemplateArgumentList(); 1829 } 1830 1831 CXXDependentScopeMemberExpr(ASTContext &C, 1832 Expr *Base, QualType BaseType, bool IsArrow, 1833 SourceLocation OperatorLoc, 1834 NestedNameSpecifier *Qualifier, 1835 SourceRange QualifierRange, 1836 NamedDecl *FirstQualifierFoundInScope, 1837 DeclarationName Member, 1838 SourceLocation MemberLoc, 1839 const TemplateArgumentListInfo *TemplateArgs); 1840 1841public: 1842 CXXDependentScopeMemberExpr(ASTContext &C, 1843 Expr *Base, QualType BaseType, 1844 bool IsArrow, 1845 SourceLocation OperatorLoc, 1846 NestedNameSpecifier *Qualifier, 1847 SourceRange QualifierRange, 1848 NamedDecl *FirstQualifierFoundInScope, 1849 DeclarationName Member, 1850 SourceLocation MemberLoc) 1851 : Expr(CXXDependentScopeMemberExprClass, C.DependentTy, true, true), 1852 Base(Base), BaseType(BaseType), IsArrow(IsArrow), 1853 HasExplicitTemplateArgs(false), OperatorLoc(OperatorLoc), 1854 Qualifier(Qualifier), QualifierRange(QualifierRange), 1855 FirstQualifierFoundInScope(FirstQualifierFoundInScope), 1856 Member(Member), MemberLoc(MemberLoc) { } 1857 1858 static CXXDependentScopeMemberExpr * 1859 Create(ASTContext &C, 1860 Expr *Base, QualType BaseType, bool IsArrow, 1861 SourceLocation OperatorLoc, 1862 NestedNameSpecifier *Qualifier, 1863 SourceRange QualifierRange, 1864 NamedDecl *FirstQualifierFoundInScope, 1865 DeclarationName Member, 1866 SourceLocation MemberLoc, 1867 const TemplateArgumentListInfo *TemplateArgs); 1868 1869 /// \brief True if this is an implicit access, i.e. one in which the 1870 /// member being accessed was not written in the source. The source 1871 /// location of the operator is invalid in this case. 1872 bool isImplicitAccess() const { return Base == 0; } 1873 1874 /// \brief Retrieve the base object of this member expressions, 1875 /// e.g., the \c x in \c x.m. 1876 Expr *getBase() const { 1877 assert(!isImplicitAccess()); 1878 return cast<Expr>(Base); 1879 } 1880 void setBase(Expr *E) { Base = E; } 1881 1882 QualType getBaseType() const { return BaseType; } 1883 1884 /// \brief Determine whether this member expression used the '->' 1885 /// operator; otherwise, it used the '.' operator. 1886 bool isArrow() const { return IsArrow; } 1887 void setArrow(bool A) { IsArrow = A; } 1888 1889 /// \brief Retrieve the location of the '->' or '.' operator. 1890 SourceLocation getOperatorLoc() const { return OperatorLoc; } 1891 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 1892 1893 /// \brief Retrieve the nested-name-specifier that qualifies the member 1894 /// name. 1895 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1896 1897 /// \brief Retrieve the source range covering the nested-name-specifier 1898 /// that qualifies the member name. 1899 SourceRange getQualifierRange() const { return QualifierRange; } 1900 1901 /// \brief Retrieve the first part of the nested-name-specifier that was 1902 /// found in the scope of the member access expression when the member access 1903 /// was initially parsed. 1904 /// 1905 /// This function only returns a useful result when member access expression 1906 /// uses a qualified member name, e.g., "x.Base::f". Here, the declaration 1907 /// returned by this function describes what was found by unqualified name 1908 /// lookup for the identifier "Base" within the scope of the member access 1909 /// expression itself. At template instantiation time, this information is 1910 /// combined with the results of name lookup into the type of the object 1911 /// expression itself (the class type of x). 1912 NamedDecl *getFirstQualifierFoundInScope() const { 1913 return FirstQualifierFoundInScope; 1914 } 1915 1916 /// \brief Retrieve the name of the member that this expression 1917 /// refers to. 1918 DeclarationName getMember() const { return Member; } 1919 void setMember(DeclarationName N) { Member = N; } 1920 1921 // \brief Retrieve the location of the name of the member that this 1922 // expression refers to. 1923 SourceLocation getMemberLoc() const { return MemberLoc; } 1924 void setMemberLoc(SourceLocation L) { MemberLoc = L; } 1925 1926 /// \brief Determines whether this member expression actually had a C++ 1927 /// template argument list explicitly specified, e.g., x.f<int>. 1928 bool hasExplicitTemplateArgs() const { 1929 return HasExplicitTemplateArgs; 1930 } 1931 1932 /// \brief Copies the template arguments (if present) into the given 1933 /// structure. 1934 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1935 assert(HasExplicitTemplateArgs); 1936 getExplicitTemplateArgumentList()->copyInto(List); 1937 } 1938 1939 /// \brief Retrieve the location of the left angle bracket following the 1940 /// member name ('<'), if any. 1941 SourceLocation getLAngleLoc() const { 1942 assert(HasExplicitTemplateArgs); 1943 return getExplicitTemplateArgumentList()->LAngleLoc; 1944 } 1945 1946 /// \brief Retrieve the template arguments provided as part of this 1947 /// template-id. 1948 const TemplateArgumentLoc *getTemplateArgs() const { 1949 assert(HasExplicitTemplateArgs); 1950 return getExplicitTemplateArgumentList()->getTemplateArgs(); 1951 } 1952 1953 /// \brief Retrieve the number of template arguments provided as part of this 1954 /// template-id. 1955 unsigned getNumTemplateArgs() const { 1956 assert(HasExplicitTemplateArgs); 1957 return getExplicitTemplateArgumentList()->NumTemplateArgs; 1958 } 1959 1960 /// \brief Retrieve the location of the right angle bracket following the 1961 /// template arguments ('>'). 1962 SourceLocation getRAngleLoc() const { 1963 assert(HasExplicitTemplateArgs); 1964 return getExplicitTemplateArgumentList()->RAngleLoc; 1965 } 1966 1967 virtual SourceRange getSourceRange() const { 1968 SourceRange Range; 1969 if (!isImplicitAccess()) 1970 Range.setBegin(Base->getSourceRange().getBegin()); 1971 else if (getQualifier()) 1972 Range.setBegin(getQualifierRange().getBegin()); 1973 else 1974 Range.setBegin(MemberLoc); 1975 1976 if (hasExplicitTemplateArgs()) 1977 Range.setEnd(getRAngleLoc()); 1978 else 1979 Range.setEnd(MemberLoc); 1980 return Range; 1981 } 1982 1983 static bool classof(const Stmt *T) { 1984 return T->getStmtClass() == CXXDependentScopeMemberExprClass; 1985 } 1986 static bool classof(const CXXDependentScopeMemberExpr *) { return true; } 1987 1988 // Iterators 1989 virtual child_iterator child_begin(); 1990 virtual child_iterator child_end(); 1991}; 1992 1993/// \brief Represents a C++ member access expression for which lookup 1994/// produced a set of overloaded functions. 1995/// 1996/// The member access may be explicit or implicit: 1997/// struct A { 1998/// int a, b; 1999/// int explicitAccess() { return this->a + this->A::b; } 2000/// int implicitAccess() { return a + A::b; } 2001/// }; 2002/// 2003/// In the final AST, an explicit access always becomes a MemberExpr. 2004/// An implicit access may become either a MemberExpr or a 2005/// DeclRefExpr, depending on whether the member is static. 2006class UnresolvedMemberExpr : public OverloadExpr { 2007 /// \brief Whether this member expression used the '->' operator or 2008 /// the '.' operator. 2009 bool IsArrow : 1; 2010 2011 /// \brief Whether the lookup results contain an unresolved using 2012 /// declaration. 2013 bool HasUnresolvedUsing : 1; 2014 2015 /// \brief The expression for the base pointer or class reference, 2016 /// e.g., the \c x in x.f. This can be null if this is an 'unbased' 2017 /// member expression 2018 Stmt *Base; 2019 2020 /// \brief The type of the base expression; never null. 2021 QualType BaseType; 2022 2023 /// \brief The location of the '->' or '.' operator. 2024 SourceLocation OperatorLoc; 2025 2026 UnresolvedMemberExpr(QualType T, bool Dependent, 2027 bool HasUnresolvedUsing, 2028 Expr *Base, QualType BaseType, bool IsArrow, 2029 SourceLocation OperatorLoc, 2030 NestedNameSpecifier *Qualifier, 2031 SourceRange QualifierRange, 2032 DeclarationName Member, 2033 SourceLocation MemberLoc, 2034 const TemplateArgumentListInfo *TemplateArgs); 2035 2036public: 2037 static UnresolvedMemberExpr * 2038 Create(ASTContext &C, bool Dependent, bool HasUnresolvedUsing, 2039 Expr *Base, QualType BaseType, bool IsArrow, 2040 SourceLocation OperatorLoc, 2041 NestedNameSpecifier *Qualifier, 2042 SourceRange QualifierRange, 2043 DeclarationName Member, 2044 SourceLocation MemberLoc, 2045 const TemplateArgumentListInfo *TemplateArgs); 2046 2047 /// \brief True if this is an implicit access, i.e. one in which the 2048 /// member being accessed was not written in the source. The source 2049 /// location of the operator is invalid in this case. 2050 bool isImplicitAccess() const { return Base == 0; } 2051 2052 /// \brief Retrieve the base object of this member expressions, 2053 /// e.g., the \c x in \c x.m. 2054 Expr *getBase() { 2055 assert(!isImplicitAccess()); 2056 return cast<Expr>(Base); 2057 } 2058 const Expr *getBase() const { 2059 assert(!isImplicitAccess()); 2060 return cast<Expr>(Base); 2061 } 2062 void setBase(Expr *E) { Base = E; } 2063 2064 QualType getBaseType() const { return BaseType; } 2065 2066 /// \brief Determine whether this member expression used the '->' 2067 /// operator; otherwise, it used the '.' operator. 2068 bool isArrow() const { return IsArrow; } 2069 void setArrow(bool A) { IsArrow = A; } 2070 2071 /// \brief Retrieve the location of the '->' or '.' operator. 2072 SourceLocation getOperatorLoc() const { return OperatorLoc; } 2073 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 2074 2075 /// \brief Retrieves the naming class of this lookup. 2076 CXXRecordDecl *getNamingClass() const; 2077 2078 /// \brief Retrieve the name of the member that this expression 2079 /// refers to. 2080 DeclarationName getMemberName() const { return getName(); } 2081 void setMemberName(DeclarationName N) { setName(N); } 2082 2083 // \brief Retrieve the location of the name of the member that this 2084 // expression refers to. 2085 SourceLocation getMemberLoc() const { return getNameLoc(); } 2086 void setMemberLoc(SourceLocation L) { setNameLoc(L); } 2087 2088 /// \brief Retrieve the explicit template argument list that followed the 2089 /// member template name. 2090 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 2091 assert(hasExplicitTemplateArgs()); 2092 return *reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 2093 } 2094 2095 /// \brief Retrieve the explicit template argument list that followed the 2096 /// member template name, if any. 2097 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 2098 assert(hasExplicitTemplateArgs()); 2099 return *reinterpret_cast<const ExplicitTemplateArgumentList *>(this + 1); 2100 } 2101 2102 /// \brief Copies the template arguments into the given structure. 2103 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 2104 getExplicitTemplateArgs().copyInto(List); 2105 } 2106 2107 /// \brief Retrieve the location of the left angle bracket following 2108 /// the member name ('<'). 2109 SourceLocation getLAngleLoc() const { 2110 return getExplicitTemplateArgs().LAngleLoc; 2111 } 2112 2113 /// \brief Retrieve the template arguments provided as part of this 2114 /// template-id. 2115 const TemplateArgumentLoc *getTemplateArgs() const { 2116 return getExplicitTemplateArgs().getTemplateArgs(); 2117 } 2118 2119 /// \brief Retrieve the number of template arguments provided as 2120 /// part of this template-id. 2121 unsigned getNumTemplateArgs() const { 2122 return getExplicitTemplateArgs().NumTemplateArgs; 2123 } 2124 2125 /// \brief Retrieve the location of the right angle bracket 2126 /// following the template arguments ('>'). 2127 SourceLocation getRAngleLoc() const { 2128 return getExplicitTemplateArgs().RAngleLoc; 2129 } 2130 2131 virtual SourceRange getSourceRange() const { 2132 SourceRange Range; 2133 if (!isImplicitAccess()) 2134 Range.setBegin(Base->getSourceRange().getBegin()); 2135 else if (getQualifier()) 2136 Range.setBegin(getQualifierRange().getBegin()); 2137 else 2138 Range.setBegin(getMemberLoc()); 2139 2140 if (hasExplicitTemplateArgs()) 2141 Range.setEnd(getRAngleLoc()); 2142 else 2143 Range.setEnd(getMemberLoc()); 2144 return Range; 2145 } 2146 2147 static bool classof(const Stmt *T) { 2148 return T->getStmtClass() == UnresolvedMemberExprClass; 2149 } 2150 static bool classof(const UnresolvedMemberExpr *) { return true; } 2151 2152 // Iterators 2153 virtual child_iterator child_begin(); 2154 virtual child_iterator child_end(); 2155}; 2156 2157inline ExplicitTemplateArgumentList &OverloadExpr::getExplicitTemplateArgs() { 2158 if (isa<UnresolvedLookupExpr>(this)) 2159 return cast<UnresolvedLookupExpr>(this)->getExplicitTemplateArgs(); 2160 else 2161 return cast<UnresolvedMemberExpr>(this)->getExplicitTemplateArgs(); 2162} 2163 2164} // end namespace clang 2165 2166#endif 2167