ExprCXX.h revision 14ab24f01e36d495fce183aa67b41e45cdd54f39
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 CXXTypeidExpr(EmptyShell Empty, bool isExpr) 325 : Expr(CXXTypeidExprClass, Empty) { 326 if (isExpr) 327 Operand = (Expr*)0; 328 else 329 Operand = (TypeSourceInfo*)0; 330 } 331 332 bool isTypeOperand() const { return Operand.is<TypeSourceInfo *>(); } 333 334 /// \brief Retrieves the type operand of this typeid() expression after 335 /// various required adjustments (removing reference types, cv-qualifiers). 336 QualType getTypeOperand() const; 337 338 /// \brief Retrieve source information for the type operand. 339 TypeSourceInfo *getTypeOperandSourceInfo() const { 340 assert(isTypeOperand() && "Cannot call getTypeOperand for typeid(expr)"); 341 return Operand.get<TypeSourceInfo *>(); 342 } 343 344 void setTypeOperandSourceInfo(TypeSourceInfo *TSI) { 345 assert(isTypeOperand() && "Cannot call getTypeOperand for typeid(expr)"); 346 Operand = TSI; 347 } 348 349 Expr *getExprOperand() const { 350 assert(!isTypeOperand() && "Cannot call getExprOperand for typeid(type)"); 351 return static_cast<Expr*>(Operand.get<Stmt *>()); 352 } 353 354 virtual SourceRange getSourceRange() const { return Range; } 355 void setSourceRange(SourceRange R) { Range = R; } 356 357 static bool classof(const Stmt *T) { 358 return T->getStmtClass() == CXXTypeidExprClass; 359 } 360 static bool classof(const CXXTypeidExpr *) { return true; } 361 362 // Iterators 363 virtual child_iterator child_begin(); 364 virtual child_iterator child_end(); 365}; 366 367/// CXXThisExpr - Represents the "this" expression in C++, which is a 368/// pointer to the object on which the current member function is 369/// executing (C++ [expr.prim]p3). Example: 370/// 371/// @code 372/// class Foo { 373/// public: 374/// void bar(); 375/// void test() { this->bar(); } 376/// }; 377/// @endcode 378class CXXThisExpr : public Expr { 379 SourceLocation Loc; 380 bool Implicit : 1; 381 382public: 383 CXXThisExpr(SourceLocation L, QualType Type, bool isImplicit) 384 : Expr(CXXThisExprClass, Type, 385 // 'this' is type-dependent if the class type of the enclosing 386 // member function is dependent (C++ [temp.dep.expr]p2) 387 Type->isDependentType(), Type->isDependentType()), 388 Loc(L), Implicit(isImplicit) { } 389 390 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 391 392 bool isImplicit() const { return Implicit; } 393 void setImplicit(bool I) { Implicit = I; } 394 395 static bool classof(const Stmt *T) { 396 return T->getStmtClass() == CXXThisExprClass; 397 } 398 static bool classof(const CXXThisExpr *) { return true; } 399 400 // Iterators 401 virtual child_iterator child_begin(); 402 virtual child_iterator child_end(); 403}; 404 405/// CXXThrowExpr - [C++ 15] C++ Throw Expression. This handles 406/// 'throw' and 'throw' assignment-expression. When 407/// assignment-expression isn't present, Op will be null. 408/// 409class CXXThrowExpr : public Expr { 410 Stmt *Op; 411 SourceLocation ThrowLoc; 412public: 413 // Ty is the void type which is used as the result type of the 414 // exepression. The l is the location of the throw keyword. expr 415 // can by null, if the optional expression to throw isn't present. 416 CXXThrowExpr(Expr *expr, QualType Ty, SourceLocation l) : 417 Expr(CXXThrowExprClass, Ty, false, false), Op(expr), ThrowLoc(l) {} 418 const Expr *getSubExpr() const { return cast_or_null<Expr>(Op); } 419 Expr *getSubExpr() { return cast_or_null<Expr>(Op); } 420 void setSubExpr(Expr *E) { Op = E; } 421 422 SourceLocation getThrowLoc() const { return ThrowLoc; } 423 void setThrowLoc(SourceLocation L) { ThrowLoc = L; } 424 425 virtual SourceRange getSourceRange() const { 426 if (getSubExpr() == 0) 427 return SourceRange(ThrowLoc, ThrowLoc); 428 return SourceRange(ThrowLoc, getSubExpr()->getSourceRange().getEnd()); 429 } 430 431 static bool classof(const Stmt *T) { 432 return T->getStmtClass() == CXXThrowExprClass; 433 } 434 static bool classof(const CXXThrowExpr *) { return true; } 435 436 // Iterators 437 virtual child_iterator child_begin(); 438 virtual child_iterator child_end(); 439}; 440 441/// CXXDefaultArgExpr - C++ [dcl.fct.default]. This wraps up a 442/// function call argument that was created from the corresponding 443/// parameter's default argument, when the call did not explicitly 444/// supply arguments for all of the parameters. 445class CXXDefaultArgExpr : public Expr { 446 /// \brief The parameter whose default is being used. 447 /// 448 /// When the bit is set, the subexpression is stored after the 449 /// CXXDefaultArgExpr itself. When the bit is clear, the parameter's 450 /// actual default expression is the subexpression. 451 llvm::PointerIntPair<ParmVarDecl *, 1, bool> Param; 452 453 /// \brief The location where the default argument expression was used. 454 SourceLocation Loc; 455 456protected: 457 CXXDefaultArgExpr(StmtClass SC, SourceLocation Loc, ParmVarDecl *param) 458 : Expr(SC, 459 param->hasUnparsedDefaultArg() 460 ? param->getType().getNonReferenceType() 461 : param->getDefaultArg()->getType(), 462 false, false), 463 Param(param, false), Loc(Loc) { } 464 465 CXXDefaultArgExpr(StmtClass SC, SourceLocation Loc, ParmVarDecl *param, 466 Expr *SubExpr) 467 : Expr(SC, SubExpr->getType(), false, false), Param(param, true), Loc(Loc) 468 { 469 *reinterpret_cast<Expr **>(this + 1) = SubExpr; 470 } 471 472protected: 473 virtual void DoDestroy(ASTContext &C); 474 475public: 476 // Param is the parameter whose default argument is used by this 477 // expression. 478 static CXXDefaultArgExpr *Create(ASTContext &C, SourceLocation Loc, 479 ParmVarDecl *Param) { 480 return new (C) CXXDefaultArgExpr(CXXDefaultArgExprClass, Loc, Param); 481 } 482 483 // Param is the parameter whose default argument is used by this 484 // expression, and SubExpr is the expression that will actually be used. 485 static CXXDefaultArgExpr *Create(ASTContext &C, 486 SourceLocation Loc, 487 ParmVarDecl *Param, 488 Expr *SubExpr); 489 490 // Retrieve the parameter that the argument was created from. 491 const ParmVarDecl *getParam() const { return Param.getPointer(); } 492 ParmVarDecl *getParam() { return Param.getPointer(); } 493 494 // Retrieve the actual argument to the function call. 495 const Expr *getExpr() const { 496 if (Param.getInt()) 497 return *reinterpret_cast<Expr const * const*> (this + 1); 498 return getParam()->getDefaultArg(); 499 } 500 Expr *getExpr() { 501 if (Param.getInt()) 502 return *reinterpret_cast<Expr **> (this + 1); 503 return getParam()->getDefaultArg(); 504 } 505 506 /// \brief Retrieve the location where this default argument was actually 507 /// used. 508 SourceLocation getUsedLocation() const { return Loc; } 509 510 virtual SourceRange getSourceRange() const { 511 // Default argument expressions have no representation in the 512 // source, so they have an empty source range. 513 return SourceRange(); 514 } 515 516 static bool classof(const Stmt *T) { 517 return T->getStmtClass() == CXXDefaultArgExprClass; 518 } 519 static bool classof(const CXXDefaultArgExpr *) { return true; } 520 521 // Iterators 522 virtual child_iterator child_begin(); 523 virtual child_iterator child_end(); 524}; 525 526/// CXXTemporary - Represents a C++ temporary. 527class CXXTemporary { 528 /// Destructor - The destructor that needs to be called. 529 const CXXDestructorDecl *Destructor; 530 531 CXXTemporary(const CXXDestructorDecl *destructor) 532 : Destructor(destructor) { } 533 ~CXXTemporary() { } 534 535public: 536 static CXXTemporary *Create(ASTContext &C, 537 const CXXDestructorDecl *Destructor); 538 539 void Destroy(ASTContext &Ctx); 540 541 const CXXDestructorDecl *getDestructor() const { return Destructor; } 542}; 543 544/// CXXBindTemporaryExpr - Represents binding an expression to a temporary, 545/// so its destructor can be called later. 546class CXXBindTemporaryExpr : public Expr { 547 CXXTemporary *Temp; 548 549 Stmt *SubExpr; 550 551 CXXBindTemporaryExpr(CXXTemporary *temp, Expr* subexpr) 552 : Expr(CXXBindTemporaryExprClass, subexpr->getType(), false, false), 553 Temp(temp), SubExpr(subexpr) { } 554 ~CXXBindTemporaryExpr() { } 555 556protected: 557 virtual void DoDestroy(ASTContext &C); 558 559public: 560 static CXXBindTemporaryExpr *Create(ASTContext &C, CXXTemporary *Temp, 561 Expr* SubExpr); 562 563 CXXTemporary *getTemporary() { return Temp; } 564 const CXXTemporary *getTemporary() const { return Temp; } 565 566 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 567 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 568 void setSubExpr(Expr *E) { SubExpr = E; } 569 570 virtual SourceRange getSourceRange() const { 571 return SubExpr->getSourceRange(); 572 } 573 574 // Implement isa/cast/dyncast/etc. 575 static bool classof(const Stmt *T) { 576 return T->getStmtClass() == CXXBindTemporaryExprClass; 577 } 578 static bool classof(const CXXBindTemporaryExpr *) { return true; } 579 580 // Iterators 581 virtual child_iterator child_begin(); 582 virtual child_iterator child_end(); 583}; 584 585/// CXXBindReferenceExpr - Represents binding an expression to a reference. 586/// In the example: 587/// 588/// const int &i = 10; 589/// 590/// a bind reference expression is inserted to indicate that 10 is bound to 591/// a reference. (Ans also that a temporary needs to be created to hold the 592/// value). 593class CXXBindReferenceExpr : public Expr { 594 // SubExpr - The expression being bound. 595 Stmt *SubExpr; 596 597 // ExtendsLifetime - Whether binding this reference extends the lifetime of 598 // the expression being bound. FIXME: Add C++ reference. 599 bool ExtendsLifetime; 600 601 /// RequiresTemporaryCopy - Whether binding the subexpression requires a 602 /// temporary copy. 603 bool RequiresTemporaryCopy; 604 605 CXXBindReferenceExpr(Expr *subexpr, bool ExtendsLifetime, 606 bool RequiresTemporaryCopy) 607 : Expr(CXXBindReferenceExprClass, subexpr->getType(), false, false), 608 SubExpr(subexpr), ExtendsLifetime(ExtendsLifetime), 609 RequiresTemporaryCopy(RequiresTemporaryCopy) { } 610 ~CXXBindReferenceExpr() { } 611 612protected: 613 virtual void DoDestroy(ASTContext &C); 614 615public: 616 static CXXBindReferenceExpr *Create(ASTContext &C, Expr *SubExpr, 617 bool ExtendsLifetime, 618 bool RequiresTemporaryCopy); 619 620 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 621 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 622 void setSubExpr(Expr *E) { SubExpr = E; } 623 624 virtual SourceRange getSourceRange() const { 625 return SubExpr->getSourceRange(); 626 } 627 628 /// requiresTemporaryCopy - Whether binding the subexpression requires a 629 /// temporary copy. 630 bool requiresTemporaryCopy() const { return RequiresTemporaryCopy; } 631 632 // extendsLifetime - Whether binding this reference extends the lifetime of 633 // the expression being bound. FIXME: Add C++ reference. 634 bool extendsLifetime() { return ExtendsLifetime; } 635 636 // Implement isa/cast/dyncast/etc. 637 static bool classof(const Stmt *T) { 638 return T->getStmtClass() == CXXBindReferenceExprClass; 639 } 640 static bool classof(const CXXBindReferenceExpr *) { return true; } 641 642 // Iterators 643 virtual child_iterator child_begin(); 644 virtual child_iterator child_end(); 645}; 646 647/// CXXConstructExpr - Represents a call to a C++ constructor. 648class CXXConstructExpr : public Expr { 649public: 650 enum ConstructionKind { 651 CK_Complete, 652 CK_NonVirtualBase, 653 CK_VirtualBase 654 }; 655 656private: 657 CXXConstructorDecl *Constructor; 658 659 SourceLocation Loc; 660 bool Elidable : 1; 661 bool ZeroInitialization : 1; 662 unsigned ConstructKind : 2; 663 Stmt **Args; 664 unsigned NumArgs; 665 666protected: 667 CXXConstructExpr(ASTContext &C, StmtClass SC, QualType T, 668 SourceLocation Loc, 669 CXXConstructorDecl *d, bool elidable, 670 Expr **args, unsigned numargs, 671 bool ZeroInitialization = false, 672 ConstructionKind ConstructKind = CK_Complete); 673 ~CXXConstructExpr() { } 674 675 virtual void DoDestroy(ASTContext &C); 676 677public: 678 /// \brief Construct an empty C++ construction expression that will store 679 /// \p numargs arguments. 680 CXXConstructExpr(EmptyShell Empty, ASTContext &C, unsigned numargs); 681 682 static CXXConstructExpr *Create(ASTContext &C, QualType T, 683 SourceLocation Loc, 684 CXXConstructorDecl *D, bool Elidable, 685 Expr **Args, unsigned NumArgs, 686 bool ZeroInitialization = false, 687 ConstructionKind ConstructKind = CK_Complete); 688 689 690 CXXConstructorDecl* getConstructor() const { return Constructor; } 691 void setConstructor(CXXConstructorDecl *C) { Constructor = C; } 692 693 SourceLocation getLocation() const { return Loc; } 694 void setLocation(SourceLocation Loc) { this->Loc = Loc; } 695 696 /// \brief Whether this construction is elidable. 697 bool isElidable() const { return Elidable; } 698 void setElidable(bool E) { Elidable = E; } 699 700 /// \brief Whether this construction first requires 701 /// zero-initialization before the initializer is called. 702 bool requiresZeroInitialization() const { return ZeroInitialization; } 703 void setRequiresZeroInitialization(bool ZeroInit) { 704 ZeroInitialization = ZeroInit; 705 } 706 707 /// \brief Determines whether this constructor is actually constructing 708 /// a base class (rather than a complete object). 709 ConstructionKind getConstructionKind() const { 710 return (ConstructionKind)ConstructKind; 711 } 712 void setConstructionKind(ConstructionKind CK) { 713 ConstructKind = CK; 714 } 715 716 typedef ExprIterator arg_iterator; 717 typedef ConstExprIterator const_arg_iterator; 718 719 arg_iterator arg_begin() { return Args; } 720 arg_iterator arg_end() { return Args + NumArgs; } 721 const_arg_iterator arg_begin() const { return Args; } 722 const_arg_iterator arg_end() const { return Args + NumArgs; } 723 724 Expr **getArgs() const { return reinterpret_cast<Expr **>(Args); } 725 unsigned getNumArgs() const { return NumArgs; } 726 727 /// getArg - Return the specified argument. 728 Expr *getArg(unsigned Arg) { 729 assert(Arg < NumArgs && "Arg access out of range!"); 730 return cast<Expr>(Args[Arg]); 731 } 732 const Expr *getArg(unsigned Arg) const { 733 assert(Arg < NumArgs && "Arg access out of range!"); 734 return cast<Expr>(Args[Arg]); 735 } 736 737 /// setArg - Set the specified argument. 738 void setArg(unsigned Arg, Expr *ArgExpr) { 739 assert(Arg < NumArgs && "Arg access out of range!"); 740 Args[Arg] = ArgExpr; 741 } 742 743 virtual SourceRange getSourceRange() const; 744 745 static bool classof(const Stmt *T) { 746 return T->getStmtClass() == CXXConstructExprClass || 747 T->getStmtClass() == CXXTemporaryObjectExprClass; 748 } 749 static bool classof(const CXXConstructExpr *) { return true; } 750 751 // Iterators 752 virtual child_iterator child_begin(); 753 virtual child_iterator child_end(); 754}; 755 756/// CXXFunctionalCastExpr - Represents an explicit C++ type conversion 757/// that uses "functional" notion (C++ [expr.type.conv]). Example: @c 758/// x = int(0.5); 759class CXXFunctionalCastExpr : public ExplicitCastExpr { 760 SourceLocation TyBeginLoc; 761 SourceLocation RParenLoc; 762public: 763 CXXFunctionalCastExpr(QualType ty, TypeSourceInfo *writtenTy, 764 SourceLocation tyBeginLoc, CastKind kind, 765 Expr *castExpr, CXXBaseSpecifierArray BasePath, 766 SourceLocation rParenLoc) 767 : ExplicitCastExpr(CXXFunctionalCastExprClass, ty, kind, castExpr, 768 BasePath, writtenTy), 769 TyBeginLoc(tyBeginLoc), RParenLoc(rParenLoc) {} 770 771 explicit CXXFunctionalCastExpr(EmptyShell Shell) 772 : ExplicitCastExpr(CXXFunctionalCastExprClass, Shell) { } 773 774 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 775 void setTypeBeginLoc(SourceLocation L) { TyBeginLoc = L; } 776 SourceLocation getRParenLoc() const { return RParenLoc; } 777 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 778 779 virtual SourceRange getSourceRange() const { 780 return SourceRange(TyBeginLoc, RParenLoc); 781 } 782 static bool classof(const Stmt *T) { 783 return T->getStmtClass() == CXXFunctionalCastExprClass; 784 } 785 static bool classof(const CXXFunctionalCastExpr *) { return true; } 786}; 787 788/// @brief Represents a C++ functional cast expression that builds a 789/// temporary object. 790/// 791/// This expression type represents a C++ "functional" cast 792/// (C++[expr.type.conv]) with N != 1 arguments that invokes a 793/// constructor to build a temporary object. If N == 0 but no 794/// constructor will be called (because the functional cast is 795/// performing a value-initialized an object whose class type has no 796/// user-declared constructors), CXXZeroInitValueExpr will represent 797/// the functional cast. Finally, with N == 1 arguments the functional 798/// cast expression will be represented by CXXFunctionalCastExpr. 799/// Example: 800/// @code 801/// struct X { X(int, float); } 802/// 803/// X create_X() { 804/// return X(1, 3.14f); // creates a CXXTemporaryObjectExpr 805/// }; 806/// @endcode 807class CXXTemporaryObjectExpr : public CXXConstructExpr { 808 SourceLocation TyBeginLoc; 809 SourceLocation RParenLoc; 810 811public: 812 CXXTemporaryObjectExpr(ASTContext &C, CXXConstructorDecl *Cons, 813 QualType writtenTy, SourceLocation tyBeginLoc, 814 Expr **Args,unsigned NumArgs, 815 SourceLocation rParenLoc, 816 bool ZeroInitialization = false); 817 818 ~CXXTemporaryObjectExpr() { } 819 820 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 821 SourceLocation getRParenLoc() const { return RParenLoc; } 822 823 virtual SourceRange getSourceRange() const { 824 return SourceRange(TyBeginLoc, RParenLoc); 825 } 826 static bool classof(const Stmt *T) { 827 return T->getStmtClass() == CXXTemporaryObjectExprClass; 828 } 829 static bool classof(const CXXTemporaryObjectExpr *) { return true; } 830}; 831 832/// CXXZeroInitValueExpr - [C++ 5.2.3p2] 833/// Expression "T()" which creates a value-initialized rvalue of type 834/// T, which is either a non-class type or a class type without any 835/// user-defined constructors. 836/// 837class CXXZeroInitValueExpr : public Expr { 838 SourceLocation TyBeginLoc; 839 SourceLocation RParenLoc; 840 841public: 842 CXXZeroInitValueExpr(QualType ty, SourceLocation tyBeginLoc, 843 SourceLocation rParenLoc ) : 844 Expr(CXXZeroInitValueExprClass, ty, false, false), 845 TyBeginLoc(tyBeginLoc), RParenLoc(rParenLoc) {} 846 847 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 848 SourceLocation getRParenLoc() const { return RParenLoc; } 849 850 /// @brief Whether this initialization expression was 851 /// implicitly-generated. 852 bool isImplicit() const { 853 return TyBeginLoc.isInvalid() && RParenLoc.isInvalid(); 854 } 855 856 virtual SourceRange getSourceRange() const { 857 return SourceRange(TyBeginLoc, RParenLoc); 858 } 859 860 static bool classof(const Stmt *T) { 861 return T->getStmtClass() == CXXZeroInitValueExprClass; 862 } 863 static bool classof(const CXXZeroInitValueExpr *) { return true; } 864 865 // Iterators 866 virtual child_iterator child_begin(); 867 virtual child_iterator child_end(); 868}; 869 870/// CXXNewExpr - A new expression for memory allocation and constructor calls, 871/// e.g: "new CXXNewExpr(foo)". 872class CXXNewExpr : public Expr { 873 // Was the usage ::new, i.e. is the global new to be used? 874 bool GlobalNew : 1; 875 // Was the form (type-id) used? Otherwise, it was new-type-id. 876 bool ParenTypeId : 1; 877 // Is there an initializer? If not, built-ins are uninitialized, else they're 878 // value-initialized. 879 bool Initializer : 1; 880 // Do we allocate an array? If so, the first SubExpr is the size expression. 881 bool Array : 1; 882 // The number of placement new arguments. 883 unsigned NumPlacementArgs : 14; 884 // The number of constructor arguments. This may be 1 even for non-class 885 // types; use the pseudo copy constructor. 886 unsigned NumConstructorArgs : 14; 887 // Contains an optional array size expression, any number of optional 888 // placement arguments, and any number of optional constructor arguments, 889 // in that order. 890 Stmt **SubExprs; 891 // Points to the allocation function used. 892 FunctionDecl *OperatorNew; 893 // Points to the deallocation function used in case of error. May be null. 894 FunctionDecl *OperatorDelete; 895 // Points to the constructor used. Cannot be null if AllocType is a record; 896 // it would still point at the default constructor (even an implicit one). 897 // Must be null for all other types. 898 CXXConstructorDecl *Constructor; 899 900 SourceLocation StartLoc; 901 SourceLocation EndLoc; 902 903public: 904 CXXNewExpr(ASTContext &C, bool globalNew, FunctionDecl *operatorNew, 905 Expr **placementArgs, unsigned numPlaceArgs, bool ParenTypeId, 906 Expr *arraySize, CXXConstructorDecl *constructor, bool initializer, 907 Expr **constructorArgs, unsigned numConsArgs, 908 FunctionDecl *operatorDelete, QualType ty, 909 SourceLocation startLoc, SourceLocation endLoc); 910 911 virtual void DoDestroy(ASTContext &C); 912 913 QualType getAllocatedType() const { 914 assert(getType()->isPointerType()); 915 return getType()->getAs<PointerType>()->getPointeeType(); 916 } 917 918 FunctionDecl *getOperatorNew() const { return OperatorNew; } 919 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 920 CXXConstructorDecl *getConstructor() const { return Constructor; } 921 922 bool isArray() const { return Array; } 923 Expr *getArraySize() { 924 return Array ? cast<Expr>(SubExprs[0]) : 0; 925 } 926 const Expr *getArraySize() const { 927 return Array ? cast<Expr>(SubExprs[0]) : 0; 928 } 929 930 unsigned getNumPlacementArgs() const { return NumPlacementArgs; } 931 Expr *getPlacementArg(unsigned i) { 932 assert(i < NumPlacementArgs && "Index out of range"); 933 return cast<Expr>(SubExprs[Array + i]); 934 } 935 const Expr *getPlacementArg(unsigned i) const { 936 assert(i < NumPlacementArgs && "Index out of range"); 937 return cast<Expr>(SubExprs[Array + i]); 938 } 939 940 bool isGlobalNew() const { return GlobalNew; } 941 bool isParenTypeId() const { return ParenTypeId; } 942 bool hasInitializer() const { return Initializer; } 943 944 unsigned getNumConstructorArgs() const { return NumConstructorArgs; } 945 Expr *getConstructorArg(unsigned i) { 946 assert(i < NumConstructorArgs && "Index out of range"); 947 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 948 } 949 const Expr *getConstructorArg(unsigned i) const { 950 assert(i < NumConstructorArgs && "Index out of range"); 951 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 952 } 953 954 typedef ExprIterator arg_iterator; 955 typedef ConstExprIterator const_arg_iterator; 956 957 arg_iterator placement_arg_begin() { 958 return SubExprs + Array; 959 } 960 arg_iterator placement_arg_end() { 961 return SubExprs + Array + getNumPlacementArgs(); 962 } 963 const_arg_iterator placement_arg_begin() const { 964 return SubExprs + Array; 965 } 966 const_arg_iterator placement_arg_end() const { 967 return SubExprs + Array + getNumPlacementArgs(); 968 } 969 970 arg_iterator constructor_arg_begin() { 971 return SubExprs + Array + getNumPlacementArgs(); 972 } 973 arg_iterator constructor_arg_end() { 974 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 975 } 976 const_arg_iterator constructor_arg_begin() const { 977 return SubExprs + Array + getNumPlacementArgs(); 978 } 979 const_arg_iterator constructor_arg_end() const { 980 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 981 } 982 983 virtual SourceRange getSourceRange() const { 984 return SourceRange(StartLoc, EndLoc); 985 } 986 987 static bool classof(const Stmt *T) { 988 return T->getStmtClass() == CXXNewExprClass; 989 } 990 static bool classof(const CXXNewExpr *) { return true; } 991 992 // Iterators 993 virtual child_iterator child_begin(); 994 virtual child_iterator child_end(); 995}; 996 997/// CXXDeleteExpr - A delete expression for memory deallocation and destructor 998/// calls, e.g. "delete[] pArray". 999class CXXDeleteExpr : public Expr { 1000 // Is this a forced global delete, i.e. "::delete"? 1001 bool GlobalDelete : 1; 1002 // Is this the array form of delete, i.e. "delete[]"? 1003 bool ArrayForm : 1; 1004 // Points to the operator delete overload that is used. Could be a member. 1005 FunctionDecl *OperatorDelete; 1006 // The pointer expression to be deleted. 1007 Stmt *Argument; 1008 // Location of the expression. 1009 SourceLocation Loc; 1010public: 1011 CXXDeleteExpr(QualType ty, bool globalDelete, bool arrayForm, 1012 FunctionDecl *operatorDelete, Expr *arg, SourceLocation loc) 1013 : Expr(CXXDeleteExprClass, ty, false, false), GlobalDelete(globalDelete), 1014 ArrayForm(arrayForm), OperatorDelete(operatorDelete), Argument(arg), 1015 Loc(loc) { } 1016 1017 bool isGlobalDelete() const { return GlobalDelete; } 1018 bool isArrayForm() const { return ArrayForm; } 1019 1020 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 1021 1022 Expr *getArgument() { return cast<Expr>(Argument); } 1023 const Expr *getArgument() const { return cast<Expr>(Argument); } 1024 1025 virtual SourceRange getSourceRange() const { 1026 return SourceRange(Loc, Argument->getLocEnd()); 1027 } 1028 1029 static bool classof(const Stmt *T) { 1030 return T->getStmtClass() == CXXDeleteExprClass; 1031 } 1032 static bool classof(const CXXDeleteExpr *) { return true; } 1033 1034 // Iterators 1035 virtual child_iterator child_begin(); 1036 virtual child_iterator child_end(); 1037}; 1038 1039/// \brief Structure used to store the type being destroyed by a 1040/// pseudo-destructor expression. 1041class PseudoDestructorTypeStorage { 1042 /// \brief Either the type source information or the name of the type, if 1043 /// it couldn't be resolved due to type-dependence. 1044 llvm::PointerUnion<TypeSourceInfo *, IdentifierInfo *> Type; 1045 1046 /// \brief The starting source location of the pseudo-destructor type. 1047 SourceLocation Location; 1048 1049public: 1050 PseudoDestructorTypeStorage() { } 1051 1052 PseudoDestructorTypeStorage(IdentifierInfo *II, SourceLocation Loc) 1053 : Type(II), Location(Loc) { } 1054 1055 PseudoDestructorTypeStorage(TypeSourceInfo *Info); 1056 1057 TypeSourceInfo *getTypeSourceInfo() const { 1058 return Type.dyn_cast<TypeSourceInfo *>(); 1059 } 1060 1061 IdentifierInfo *getIdentifier() const { 1062 return Type.dyn_cast<IdentifierInfo *>(); 1063 } 1064 1065 SourceLocation getLocation() const { return Location; } 1066}; 1067 1068/// \brief Represents a C++ pseudo-destructor (C++ [expr.pseudo]). 1069/// 1070/// A pseudo-destructor is an expression that looks like a member access to a 1071/// destructor of a scalar type, except that scalar types don't have 1072/// destructors. For example: 1073/// 1074/// \code 1075/// typedef int T; 1076/// void f(int *p) { 1077/// p->T::~T(); 1078/// } 1079/// \endcode 1080/// 1081/// Pseudo-destructors typically occur when instantiating templates such as: 1082/// 1083/// \code 1084/// template<typename T> 1085/// void destroy(T* ptr) { 1086/// ptr->T::~T(); 1087/// } 1088/// \endcode 1089/// 1090/// for scalar types. A pseudo-destructor expression has no run-time semantics 1091/// beyond evaluating the base expression. 1092class CXXPseudoDestructorExpr : public Expr { 1093 /// \brief The base expression (that is being destroyed). 1094 Stmt *Base; 1095 1096 /// \brief Whether the operator was an arrow ('->'); otherwise, it was a 1097 /// period ('.'). 1098 bool IsArrow : 1; 1099 1100 /// \brief The location of the '.' or '->' operator. 1101 SourceLocation OperatorLoc; 1102 1103 /// \brief The nested-name-specifier that follows the operator, if present. 1104 NestedNameSpecifier *Qualifier; 1105 1106 /// \brief The source range that covers the nested-name-specifier, if 1107 /// present. 1108 SourceRange QualifierRange; 1109 1110 /// \brief The type that precedes the '::' in a qualified pseudo-destructor 1111 /// expression. 1112 TypeSourceInfo *ScopeType; 1113 1114 /// \brief The location of the '::' in a qualified pseudo-destructor 1115 /// expression. 1116 SourceLocation ColonColonLoc; 1117 1118 /// \brief The location of the '~'. 1119 SourceLocation TildeLoc; 1120 1121 /// \brief The type being destroyed, or its name if we were unable to 1122 /// resolve the name. 1123 PseudoDestructorTypeStorage DestroyedType; 1124 1125public: 1126 CXXPseudoDestructorExpr(ASTContext &Context, 1127 Expr *Base, bool isArrow, SourceLocation OperatorLoc, 1128 NestedNameSpecifier *Qualifier, 1129 SourceRange QualifierRange, 1130 TypeSourceInfo *ScopeType, 1131 SourceLocation ColonColonLoc, 1132 SourceLocation TildeLoc, 1133 PseudoDestructorTypeStorage DestroyedType) 1134 : Expr(CXXPseudoDestructorExprClass, 1135 Context.getPointerType(Context.getFunctionType(Context.VoidTy, 0, 0, 1136 false, 0, false, 1137 false, 0, 0, 1138 FunctionType::ExtInfo())), 1139 /*isTypeDependent=*/(Base->isTypeDependent() || 1140 (DestroyedType.getTypeSourceInfo() && 1141 DestroyedType.getTypeSourceInfo()->getType()->isDependentType())), 1142 /*isValueDependent=*/Base->isValueDependent()), 1143 Base(static_cast<Stmt *>(Base)), IsArrow(isArrow), 1144 OperatorLoc(OperatorLoc), Qualifier(Qualifier), 1145 QualifierRange(QualifierRange), 1146 ScopeType(ScopeType), ColonColonLoc(ColonColonLoc), TildeLoc(TildeLoc), 1147 DestroyedType(DestroyedType) { } 1148 1149 void setBase(Expr *E) { Base = E; } 1150 Expr *getBase() const { return cast<Expr>(Base); } 1151 1152 /// \brief Determines whether this member expression actually had 1153 /// a C++ nested-name-specifier prior to the name of the member, e.g., 1154 /// x->Base::foo. 1155 bool hasQualifier() const { return Qualifier != 0; } 1156 1157 /// \brief If the member name was qualified, retrieves the source range of 1158 /// the nested-name-specifier that precedes the member name. Otherwise, 1159 /// returns an empty source range. 1160 SourceRange getQualifierRange() const { return QualifierRange; } 1161 1162 /// \brief If the member name was qualified, retrieves the 1163 /// nested-name-specifier that precedes the member name. Otherwise, returns 1164 /// NULL. 1165 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1166 1167 /// \brief Determine whether this pseudo-destructor expression was written 1168 /// using an '->' (otherwise, it used a '.'). 1169 bool isArrow() const { return IsArrow; } 1170 void setArrow(bool A) { IsArrow = A; } 1171 1172 /// \brief Retrieve the location of the '.' or '->' operator. 1173 SourceLocation getOperatorLoc() const { return OperatorLoc; } 1174 1175 /// \brief Retrieve the scope type in a qualified pseudo-destructor 1176 /// expression. 1177 /// 1178 /// Pseudo-destructor expressions can have extra qualification within them 1179 /// that is not part of the nested-name-specifier, e.g., \c p->T::~T(). 1180 /// Here, if the object type of the expression is (or may be) a scalar type, 1181 /// \p T may also be a scalar type and, therefore, cannot be part of a 1182 /// nested-name-specifier. It is stored as the "scope type" of the pseudo- 1183 /// destructor expression. 1184 TypeSourceInfo *getScopeTypeInfo() const { return ScopeType; } 1185 1186 /// \brief Retrieve the location of the '::' in a qualified pseudo-destructor 1187 /// expression. 1188 SourceLocation getColonColonLoc() const { return ColonColonLoc; } 1189 1190 /// \brief Retrieve the location of the '~'. 1191 SourceLocation getTildeLoc() const { return TildeLoc; } 1192 1193 /// \brief Retrieve the source location information for the type 1194 /// being destroyed. 1195 /// 1196 /// This type-source information is available for non-dependent 1197 /// pseudo-destructor expressions and some dependent pseudo-destructor 1198 /// expressions. Returns NULL if we only have the identifier for a 1199 /// dependent pseudo-destructor expression. 1200 TypeSourceInfo *getDestroyedTypeInfo() const { 1201 return DestroyedType.getTypeSourceInfo(); 1202 } 1203 1204 /// \brief In a dependent pseudo-destructor expression for which we do not 1205 /// have full type information on the destroyed type, provides the name 1206 /// of the destroyed type. 1207 IdentifierInfo *getDestroyedTypeIdentifier() const { 1208 return DestroyedType.getIdentifier(); 1209 } 1210 1211 /// \brief Retrieve the type being destroyed. 1212 QualType getDestroyedType() const; 1213 1214 /// \brief Retrieve the starting location of the type being destroyed. 1215 SourceLocation getDestroyedTypeLoc() const { 1216 return DestroyedType.getLocation(); 1217 } 1218 1219 virtual SourceRange getSourceRange() const; 1220 1221 static bool classof(const Stmt *T) { 1222 return T->getStmtClass() == CXXPseudoDestructorExprClass; 1223 } 1224 static bool classof(const CXXPseudoDestructorExpr *) { return true; } 1225 1226 // Iterators 1227 virtual child_iterator child_begin(); 1228 virtual child_iterator child_end(); 1229}; 1230 1231/// UnaryTypeTraitExpr - A GCC or MS unary type trait, as used in the 1232/// implementation of TR1/C++0x type trait templates. 1233/// Example: 1234/// __is_pod(int) == true 1235/// __is_enum(std::string) == false 1236class UnaryTypeTraitExpr : public Expr { 1237 /// UTT - The trait. 1238 UnaryTypeTrait UTT; 1239 1240 /// Loc - The location of the type trait keyword. 1241 SourceLocation Loc; 1242 1243 /// RParen - The location of the closing paren. 1244 SourceLocation RParen; 1245 1246 /// QueriedType - The type we're testing. 1247 QualType QueriedType; 1248 1249public: 1250 UnaryTypeTraitExpr(SourceLocation loc, UnaryTypeTrait utt, QualType queried, 1251 SourceLocation rparen, QualType ty) 1252 : Expr(UnaryTypeTraitExprClass, ty, false, queried->isDependentType()), 1253 UTT(utt), Loc(loc), RParen(rparen), QueriedType(queried) { } 1254 1255 virtual SourceRange getSourceRange() const { return SourceRange(Loc, RParen);} 1256 1257 UnaryTypeTrait getTrait() const { return UTT; } 1258 1259 QualType getQueriedType() const { return QueriedType; } 1260 1261 bool EvaluateTrait(ASTContext&) const; 1262 1263 static bool classof(const Stmt *T) { 1264 return T->getStmtClass() == UnaryTypeTraitExprClass; 1265 } 1266 static bool classof(const UnaryTypeTraitExpr *) { return true; } 1267 1268 // Iterators 1269 virtual child_iterator child_begin(); 1270 virtual child_iterator child_end(); 1271}; 1272 1273/// \brief A reference to an overloaded function set, either an 1274/// \t UnresolvedLookupExpr or an \t UnresolvedMemberExpr. 1275class OverloadExpr : public Expr { 1276 /// The results. These are undesugared, which is to say, they may 1277 /// include UsingShadowDecls. Access is relative to the naming 1278 /// class. 1279 UnresolvedSet<4> Results; 1280 1281 /// The common name of these declarations. 1282 DeclarationName Name; 1283 1284 /// The scope specifier, if any. 1285 NestedNameSpecifier *Qualifier; 1286 1287 /// The source range of the scope specifier. 1288 SourceRange QualifierRange; 1289 1290 /// The location of the name. 1291 SourceLocation NameLoc; 1292 1293 /// True if the name was a template-id. 1294 bool HasExplicitTemplateArgs; 1295 1296protected: 1297 OverloadExpr(StmtClass K, QualType T, bool Dependent, 1298 NestedNameSpecifier *Qualifier, SourceRange QRange, 1299 DeclarationName Name, SourceLocation NameLoc, 1300 bool HasTemplateArgs) 1301 : Expr(K, T, Dependent, Dependent), 1302 Name(Name), Qualifier(Qualifier), QualifierRange(QRange), 1303 NameLoc(NameLoc), HasExplicitTemplateArgs(HasTemplateArgs) 1304 {} 1305 1306public: 1307 /// Computes whether an unresolved lookup on the given declarations 1308 /// and optional template arguments is type- and value-dependent. 1309 static bool ComputeDependence(UnresolvedSetIterator Begin, 1310 UnresolvedSetIterator End, 1311 const TemplateArgumentListInfo *Args); 1312 1313 /// Finds the overloaded expression in the given expression of 1314 /// OverloadTy. 1315 /// 1316 /// \return the expression (which must be there) and true if it is 1317 /// within an address-of operator. 1318 static llvm::PointerIntPair<OverloadExpr*,1> find(Expr *E) { 1319 assert(E->getType()->isSpecificBuiltinType(BuiltinType::Overload)); 1320 1321 bool op = false; 1322 E = E->IgnoreParens(); 1323 if (isa<UnaryOperator>(E)) 1324 op = true, E = cast<UnaryOperator>(E)->getSubExpr()->IgnoreParens(); 1325 return llvm::PointerIntPair<OverloadExpr*,1>(cast<OverloadExpr>(E), op); 1326 } 1327 1328 void addDecls(UnresolvedSetIterator Begin, UnresolvedSetIterator End) { 1329 Results.append(Begin, End); 1330 } 1331 1332 /// Gets the naming class of this lookup, if any. 1333 CXXRecordDecl *getNamingClass() const; 1334 1335 typedef UnresolvedSetImpl::iterator decls_iterator; 1336 decls_iterator decls_begin() const { return Results.begin(); } 1337 decls_iterator decls_end() const { return Results.end(); } 1338 1339 /// Gets the decls as an unresolved set. 1340 const UnresolvedSetImpl &getDecls() { return Results; } 1341 1342 /// Gets the number of declarations in the unresolved set. 1343 unsigned getNumDecls() const { return Results.size(); } 1344 1345 /// Gets the name looked up. 1346 DeclarationName getName() const { return Name; } 1347 void setName(DeclarationName N) { Name = N; } 1348 1349 /// Gets the location of the name. 1350 SourceLocation getNameLoc() const { return NameLoc; } 1351 void setNameLoc(SourceLocation Loc) { NameLoc = Loc; } 1352 1353 /// Fetches the nested-name qualifier, if one was given. 1354 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1355 1356 /// Fetches the range of the nested-name qualifier. 1357 SourceRange getQualifierRange() const { return QualifierRange; } 1358 1359 /// \brief Determines whether this expression had an explicit 1360 /// template argument list, e.g. f<int>. 1361 bool hasExplicitTemplateArgs() const { return HasExplicitTemplateArgs; } 1362 1363 ExplicitTemplateArgumentList &getExplicitTemplateArgs(); // defined far below 1364 1365 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1366 return const_cast<OverloadExpr*>(this)->getExplicitTemplateArgs(); 1367 } 1368 1369 ExplicitTemplateArgumentList *getOptionalExplicitTemplateArgs() { 1370 if (hasExplicitTemplateArgs()) 1371 return &getExplicitTemplateArgs(); 1372 return 0; 1373 } 1374 1375 static bool classof(const Stmt *T) { 1376 return T->getStmtClass() == UnresolvedLookupExprClass || 1377 T->getStmtClass() == UnresolvedMemberExprClass; 1378 } 1379 static bool classof(const OverloadExpr *) { return true; } 1380}; 1381 1382/// \brief A reference to a name which we were able to look up during 1383/// parsing but could not resolve to a specific declaration. This 1384/// arises in several ways: 1385/// * we might be waiting for argument-dependent lookup 1386/// * the name might resolve to an overloaded function 1387/// and eventually: 1388/// * the lookup might have included a function template 1389/// These never include UnresolvedUsingValueDecls, which are always 1390/// class members and therefore appear only in 1391/// UnresolvedMemberLookupExprs. 1392class UnresolvedLookupExpr : public OverloadExpr { 1393 /// True if these lookup results should be extended by 1394 /// argument-dependent lookup if this is the operand of a function 1395 /// call. 1396 bool RequiresADL; 1397 1398 /// True if these lookup results are overloaded. This is pretty 1399 /// trivially rederivable if we urgently need to kill this field. 1400 bool Overloaded; 1401 1402 /// The naming class (C++ [class.access.base]p5) of the lookup, if 1403 /// any. This can generally be recalculated from the context chain, 1404 /// but that can be fairly expensive for unqualified lookups. If we 1405 /// want to improve memory use here, this could go in a union 1406 /// against the qualified-lookup bits. 1407 CXXRecordDecl *NamingClass; 1408 1409 UnresolvedLookupExpr(QualType T, bool Dependent, CXXRecordDecl *NamingClass, 1410 NestedNameSpecifier *Qualifier, SourceRange QRange, 1411 DeclarationName Name, SourceLocation NameLoc, 1412 bool RequiresADL, bool Overloaded, bool HasTemplateArgs) 1413 : OverloadExpr(UnresolvedLookupExprClass, T, Dependent, Qualifier, QRange, 1414 Name, NameLoc, HasTemplateArgs), 1415 RequiresADL(RequiresADL), Overloaded(Overloaded), NamingClass(NamingClass) 1416 {} 1417 1418public: 1419 static UnresolvedLookupExpr *Create(ASTContext &C, 1420 bool Dependent, 1421 CXXRecordDecl *NamingClass, 1422 NestedNameSpecifier *Qualifier, 1423 SourceRange QualifierRange, 1424 DeclarationName Name, 1425 SourceLocation NameLoc, 1426 bool ADL, bool Overloaded) { 1427 return new(C) UnresolvedLookupExpr(Dependent ? C.DependentTy : C.OverloadTy, 1428 Dependent, NamingClass, 1429 Qualifier, QualifierRange, 1430 Name, NameLoc, ADL, Overloaded, false); 1431 } 1432 1433 static UnresolvedLookupExpr *Create(ASTContext &C, 1434 bool Dependent, 1435 CXXRecordDecl *NamingClass, 1436 NestedNameSpecifier *Qualifier, 1437 SourceRange QualifierRange, 1438 DeclarationName Name, 1439 SourceLocation NameLoc, 1440 bool ADL, 1441 const TemplateArgumentListInfo &Args); 1442 1443 /// True if this declaration should be extended by 1444 /// argument-dependent lookup. 1445 bool requiresADL() const { return RequiresADL; } 1446 1447 /// True if this lookup is overloaded. 1448 bool isOverloaded() const { return Overloaded; } 1449 1450 /// Gets the 'naming class' (in the sense of C++0x 1451 /// [class.access.base]p5) of the lookup. This is the scope 1452 /// that was looked in to find these results. 1453 CXXRecordDecl *getNamingClass() const { return NamingClass; } 1454 1455 // Note that, inconsistently with the explicit-template-argument AST 1456 // nodes, users are *forbidden* from calling these methods on objects 1457 // without explicit template arguments. 1458 1459 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 1460 assert(hasExplicitTemplateArgs()); 1461 return *reinterpret_cast<ExplicitTemplateArgumentList*>(this + 1); 1462 } 1463 1464 /// Gets a reference to the explicit template argument list. 1465 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1466 assert(hasExplicitTemplateArgs()); 1467 return *reinterpret_cast<const ExplicitTemplateArgumentList*>(this + 1); 1468 } 1469 1470 /// \brief Copies the template arguments (if present) into the given 1471 /// structure. 1472 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1473 getExplicitTemplateArgs().copyInto(List); 1474 } 1475 1476 SourceLocation getLAngleLoc() const { 1477 return getExplicitTemplateArgs().LAngleLoc; 1478 } 1479 1480 SourceLocation getRAngleLoc() const { 1481 return getExplicitTemplateArgs().RAngleLoc; 1482 } 1483 1484 TemplateArgumentLoc const *getTemplateArgs() const { 1485 return getExplicitTemplateArgs().getTemplateArgs(); 1486 } 1487 1488 unsigned getNumTemplateArgs() const { 1489 return getExplicitTemplateArgs().NumTemplateArgs; 1490 } 1491 1492 virtual SourceRange getSourceRange() const { 1493 SourceRange Range(getNameLoc()); 1494 if (getQualifier()) Range.setBegin(getQualifierRange().getBegin()); 1495 if (hasExplicitTemplateArgs()) Range.setEnd(getRAngleLoc()); 1496 return Range; 1497 } 1498 1499 virtual StmtIterator child_begin(); 1500 virtual StmtIterator child_end(); 1501 1502 static bool classof(const Stmt *T) { 1503 return T->getStmtClass() == UnresolvedLookupExprClass; 1504 } 1505 static bool classof(const UnresolvedLookupExpr *) { return true; } 1506}; 1507 1508/// \brief A qualified reference to a name whose declaration cannot 1509/// yet be resolved. 1510/// 1511/// DependentScopeDeclRefExpr is similar to DeclRefExpr in that 1512/// it expresses a reference to a declaration such as 1513/// X<T>::value. The difference, however, is that an 1514/// DependentScopeDeclRefExpr node is used only within C++ templates when 1515/// the qualification (e.g., X<T>::) refers to a dependent type. In 1516/// this case, X<T>::value cannot resolve to a declaration because the 1517/// declaration will differ from on instantiation of X<T> to the 1518/// next. Therefore, DependentScopeDeclRefExpr keeps track of the 1519/// qualifier (X<T>::) and the name of the entity being referenced 1520/// ("value"). Such expressions will instantiate to a DeclRefExpr once the 1521/// declaration can be found. 1522class DependentScopeDeclRefExpr : public Expr { 1523 /// The name of the entity we will be referencing. 1524 DeclarationName Name; 1525 1526 /// Location of the name of the declaration we're referencing. 1527 SourceLocation Loc; 1528 1529 /// QualifierRange - The source range that covers the 1530 /// nested-name-specifier. 1531 SourceRange QualifierRange; 1532 1533 /// \brief The nested-name-specifier that qualifies this unresolved 1534 /// declaration name. 1535 NestedNameSpecifier *Qualifier; 1536 1537 /// \brief Whether the name includes explicit template arguments. 1538 bool HasExplicitTemplateArgs; 1539 1540 DependentScopeDeclRefExpr(QualType T, 1541 NestedNameSpecifier *Qualifier, 1542 SourceRange QualifierRange, 1543 DeclarationName Name, 1544 SourceLocation NameLoc, 1545 bool HasExplicitTemplateArgs) 1546 : Expr(DependentScopeDeclRefExprClass, T, true, true), 1547 Name(Name), Loc(NameLoc), 1548 QualifierRange(QualifierRange), Qualifier(Qualifier), 1549 HasExplicitTemplateArgs(HasExplicitTemplateArgs) 1550 {} 1551 1552public: 1553 static DependentScopeDeclRefExpr *Create(ASTContext &C, 1554 NestedNameSpecifier *Qualifier, 1555 SourceRange QualifierRange, 1556 DeclarationName Name, 1557 SourceLocation NameLoc, 1558 const TemplateArgumentListInfo *TemplateArgs = 0); 1559 1560 /// \brief Retrieve the name that this expression refers to. 1561 DeclarationName getDeclName() const { return Name; } 1562 1563 /// \brief Retrieve the location of the name within the expression. 1564 SourceLocation getLocation() const { return Loc; } 1565 1566 /// \brief Retrieve the source range of the nested-name-specifier. 1567 SourceRange getQualifierRange() const { return QualifierRange; } 1568 1569 /// \brief Retrieve the nested-name-specifier that qualifies this 1570 /// declaration. 1571 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1572 1573 /// Determines whether this lookup had explicit template arguments. 1574 bool hasExplicitTemplateArgs() const { return HasExplicitTemplateArgs; } 1575 1576 // Note that, inconsistently with the explicit-template-argument AST 1577 // nodes, users are *forbidden* from calling these methods on objects 1578 // without explicit template arguments. 1579 1580 /// Gets a reference to the explicit template argument list. 1581 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1582 assert(hasExplicitTemplateArgs()); 1583 return *reinterpret_cast<const ExplicitTemplateArgumentList*>(this + 1); 1584 } 1585 1586 /// \brief Copies the template arguments (if present) into the given 1587 /// structure. 1588 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1589 getExplicitTemplateArgs().copyInto(List); 1590 } 1591 1592 SourceLocation getLAngleLoc() const { 1593 return getExplicitTemplateArgs().LAngleLoc; 1594 } 1595 1596 SourceLocation getRAngleLoc() const { 1597 return getExplicitTemplateArgs().RAngleLoc; 1598 } 1599 1600 TemplateArgumentLoc const *getTemplateArgs() const { 1601 return getExplicitTemplateArgs().getTemplateArgs(); 1602 } 1603 1604 unsigned getNumTemplateArgs() const { 1605 return getExplicitTemplateArgs().NumTemplateArgs; 1606 } 1607 1608 virtual SourceRange getSourceRange() const { 1609 SourceRange Range(QualifierRange.getBegin(), getLocation()); 1610 if (hasExplicitTemplateArgs()) 1611 Range.setEnd(getRAngleLoc()); 1612 return Range; 1613 } 1614 1615 static bool classof(const Stmt *T) { 1616 return T->getStmtClass() == DependentScopeDeclRefExprClass; 1617 } 1618 static bool classof(const DependentScopeDeclRefExpr *) { return true; } 1619 1620 virtual StmtIterator child_begin(); 1621 virtual StmtIterator child_end(); 1622}; 1623 1624class CXXExprWithTemporaries : public Expr { 1625 Stmt *SubExpr; 1626 1627 CXXTemporary **Temps; 1628 unsigned NumTemps; 1629 1630 CXXExprWithTemporaries(Expr *SubExpr, CXXTemporary **Temps, 1631 unsigned NumTemps); 1632 ~CXXExprWithTemporaries(); 1633 1634protected: 1635 virtual void DoDestroy(ASTContext &C); 1636 1637public: 1638 static CXXExprWithTemporaries *Create(ASTContext &C, Expr *SubExpr, 1639 CXXTemporary **Temps, 1640 unsigned NumTemps); 1641 1642 unsigned getNumTemporaries() const { return NumTemps; } 1643 CXXTemporary *getTemporary(unsigned i) { 1644 assert(i < NumTemps && "Index out of range"); 1645 return Temps[i]; 1646 } 1647 const CXXTemporary *getTemporary(unsigned i) const { 1648 return const_cast<CXXExprWithTemporaries*>(this)->getTemporary(i); 1649 } 1650 1651 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 1652 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 1653 void setSubExpr(Expr *E) { SubExpr = E; } 1654 1655 virtual SourceRange getSourceRange() const { 1656 return SubExpr->getSourceRange(); 1657 } 1658 1659 // Implement isa/cast/dyncast/etc. 1660 static bool classof(const Stmt *T) { 1661 return T->getStmtClass() == CXXExprWithTemporariesClass; 1662 } 1663 static bool classof(const CXXExprWithTemporaries *) { return true; } 1664 1665 // Iterators 1666 virtual child_iterator child_begin(); 1667 virtual child_iterator child_end(); 1668}; 1669 1670/// \brief Describes an explicit type conversion that uses functional 1671/// notion but could not be resolved because one or more arguments are 1672/// type-dependent. 1673/// 1674/// The explicit type conversions expressed by 1675/// CXXUnresolvedConstructExpr have the form \c T(a1, a2, ..., aN), 1676/// where \c T is some type and \c a1, a2, ..., aN are values, and 1677/// either \C T is a dependent type or one or more of the \c a's is 1678/// type-dependent. For example, this would occur in a template such 1679/// as: 1680/// 1681/// \code 1682/// template<typename T, typename A1> 1683/// inline T make_a(const A1& a1) { 1684/// return T(a1); 1685/// } 1686/// \endcode 1687/// 1688/// When the returned expression is instantiated, it may resolve to a 1689/// constructor call, conversion function call, or some kind of type 1690/// conversion. 1691class CXXUnresolvedConstructExpr : public Expr { 1692 /// \brief The starting location of the type 1693 SourceLocation TyBeginLoc; 1694 1695 /// \brief The type being constructed. 1696 QualType Type; 1697 1698 /// \brief The location of the left parentheses ('('). 1699 SourceLocation LParenLoc; 1700 1701 /// \brief The location of the right parentheses (')'). 1702 SourceLocation RParenLoc; 1703 1704 /// \brief The number of arguments used to construct the type. 1705 unsigned NumArgs; 1706 1707 CXXUnresolvedConstructExpr(SourceLocation TyBegin, 1708 QualType T, 1709 SourceLocation LParenLoc, 1710 Expr **Args, 1711 unsigned NumArgs, 1712 SourceLocation RParenLoc); 1713 1714public: 1715 static CXXUnresolvedConstructExpr *Create(ASTContext &C, 1716 SourceLocation TyBegin, 1717 QualType T, 1718 SourceLocation LParenLoc, 1719 Expr **Args, 1720 unsigned NumArgs, 1721 SourceLocation RParenLoc); 1722 1723 /// \brief Retrieve the source location where the type begins. 1724 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 1725 void setTypeBeginLoc(SourceLocation L) { TyBeginLoc = L; } 1726 1727 /// \brief Retrieve the type that is being constructed, as specified 1728 /// in the source code. 1729 QualType getTypeAsWritten() const { return Type; } 1730 void setTypeAsWritten(QualType T) { Type = T; } 1731 1732 /// \brief Retrieve the location of the left parentheses ('(') that 1733 /// precedes the argument list. 1734 SourceLocation getLParenLoc() const { return LParenLoc; } 1735 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 1736 1737 /// \brief Retrieve the location of the right parentheses (')') that 1738 /// follows the argument list. 1739 SourceLocation getRParenLoc() const { return RParenLoc; } 1740 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1741 1742 /// \brief Retrieve the number of arguments. 1743 unsigned arg_size() const { return NumArgs; } 1744 1745 typedef Expr** arg_iterator; 1746 arg_iterator arg_begin() { return reinterpret_cast<Expr**>(this + 1); } 1747 arg_iterator arg_end() { return arg_begin() + NumArgs; } 1748 1749 typedef const Expr* const * const_arg_iterator; 1750 const_arg_iterator arg_begin() const { 1751 return reinterpret_cast<const Expr* const *>(this + 1); 1752 } 1753 const_arg_iterator arg_end() const { 1754 return arg_begin() + NumArgs; 1755 } 1756 1757 Expr *getArg(unsigned I) { 1758 assert(I < NumArgs && "Argument index out-of-range"); 1759 return *(arg_begin() + I); 1760 } 1761 1762 const Expr *getArg(unsigned I) const { 1763 assert(I < NumArgs && "Argument index out-of-range"); 1764 return *(arg_begin() + I); 1765 } 1766 1767 virtual SourceRange getSourceRange() const { 1768 return SourceRange(TyBeginLoc, RParenLoc); 1769 } 1770 static bool classof(const Stmt *T) { 1771 return T->getStmtClass() == CXXUnresolvedConstructExprClass; 1772 } 1773 static bool classof(const CXXUnresolvedConstructExpr *) { return true; } 1774 1775 // Iterators 1776 virtual child_iterator child_begin(); 1777 virtual child_iterator child_end(); 1778}; 1779 1780/// \brief Represents a C++ member access expression where the actual 1781/// member referenced could not be resolved because the base 1782/// expression or the member name was dependent. 1783/// 1784/// Like UnresolvedMemberExprs, these can be either implicit or 1785/// explicit accesses. It is only possible to get one of these with 1786/// an implicit access if a qualifier is provided. 1787class CXXDependentScopeMemberExpr : public Expr { 1788 /// \brief The expression for the base pointer or class reference, 1789 /// e.g., the \c x in x.f. Can be null in implicit accesses. 1790 Stmt *Base; 1791 1792 /// \brief The type of the base expression. Never null, even for 1793 /// implicit accesses. 1794 QualType BaseType; 1795 1796 /// \brief Whether this member expression used the '->' operator or 1797 /// the '.' operator. 1798 bool IsArrow : 1; 1799 1800 /// \brief Whether this member expression has explicitly-specified template 1801 /// arguments. 1802 bool HasExplicitTemplateArgs : 1; 1803 1804 /// \brief The location of the '->' or '.' operator. 1805 SourceLocation OperatorLoc; 1806 1807 /// \brief The nested-name-specifier that precedes the member name, if any. 1808 NestedNameSpecifier *Qualifier; 1809 1810 /// \brief The source range covering the nested name specifier. 1811 SourceRange QualifierRange; 1812 1813 /// \brief In a qualified member access expression such as t->Base::f, this 1814 /// member stores the resolves of name lookup in the context of the member 1815 /// access expression, to be used at instantiation time. 1816 /// 1817 /// FIXME: This member, along with the Qualifier and QualifierRange, could 1818 /// be stuck into a structure that is optionally allocated at the end of 1819 /// the CXXDependentScopeMemberExpr, to save space in the common case. 1820 NamedDecl *FirstQualifierFoundInScope; 1821 1822 /// \brief The member to which this member expression refers, which 1823 /// can be name, overloaded operator, or destructor. 1824 /// FIXME: could also be a template-id 1825 DeclarationName Member; 1826 1827 /// \brief The location of the member name. 1828 SourceLocation MemberLoc; 1829 1830 /// \brief Retrieve the explicit template argument list that followed the 1831 /// member template name, if any. 1832 ExplicitTemplateArgumentList *getExplicitTemplateArgumentList() { 1833 assert(HasExplicitTemplateArgs); 1834 return reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 1835 } 1836 1837 /// \brief Retrieve the explicit template argument list that followed the 1838 /// member template name, if any. 1839 const ExplicitTemplateArgumentList *getExplicitTemplateArgumentList() const { 1840 return const_cast<CXXDependentScopeMemberExpr *>(this) 1841 ->getExplicitTemplateArgumentList(); 1842 } 1843 1844 CXXDependentScopeMemberExpr(ASTContext &C, 1845 Expr *Base, QualType BaseType, bool IsArrow, 1846 SourceLocation OperatorLoc, 1847 NestedNameSpecifier *Qualifier, 1848 SourceRange QualifierRange, 1849 NamedDecl *FirstQualifierFoundInScope, 1850 DeclarationName Member, 1851 SourceLocation MemberLoc, 1852 const TemplateArgumentListInfo *TemplateArgs); 1853 1854public: 1855 CXXDependentScopeMemberExpr(ASTContext &C, 1856 Expr *Base, QualType BaseType, 1857 bool IsArrow, 1858 SourceLocation OperatorLoc, 1859 NestedNameSpecifier *Qualifier, 1860 SourceRange QualifierRange, 1861 NamedDecl *FirstQualifierFoundInScope, 1862 DeclarationName Member, 1863 SourceLocation MemberLoc) 1864 : Expr(CXXDependentScopeMemberExprClass, C.DependentTy, true, true), 1865 Base(Base), BaseType(BaseType), IsArrow(IsArrow), 1866 HasExplicitTemplateArgs(false), OperatorLoc(OperatorLoc), 1867 Qualifier(Qualifier), QualifierRange(QualifierRange), 1868 FirstQualifierFoundInScope(FirstQualifierFoundInScope), 1869 Member(Member), MemberLoc(MemberLoc) { } 1870 1871 static CXXDependentScopeMemberExpr * 1872 Create(ASTContext &C, 1873 Expr *Base, QualType BaseType, bool IsArrow, 1874 SourceLocation OperatorLoc, 1875 NestedNameSpecifier *Qualifier, 1876 SourceRange QualifierRange, 1877 NamedDecl *FirstQualifierFoundInScope, 1878 DeclarationName Member, 1879 SourceLocation MemberLoc, 1880 const TemplateArgumentListInfo *TemplateArgs); 1881 1882 /// \brief True if this is an implicit access, i.e. one in which the 1883 /// member being accessed was not written in the source. The source 1884 /// location of the operator is invalid in this case. 1885 bool isImplicitAccess() const { return Base == 0; } 1886 1887 /// \brief Retrieve the base object of this member expressions, 1888 /// e.g., the \c x in \c x.m. 1889 Expr *getBase() const { 1890 assert(!isImplicitAccess()); 1891 return cast<Expr>(Base); 1892 } 1893 void setBase(Expr *E) { Base = E; } 1894 1895 QualType getBaseType() const { return BaseType; } 1896 1897 /// \brief Determine whether this member expression used the '->' 1898 /// operator; otherwise, it used the '.' operator. 1899 bool isArrow() const { return IsArrow; } 1900 void setArrow(bool A) { IsArrow = A; } 1901 1902 /// \brief Retrieve the location of the '->' or '.' operator. 1903 SourceLocation getOperatorLoc() const { return OperatorLoc; } 1904 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 1905 1906 /// \brief Retrieve the nested-name-specifier that qualifies the member 1907 /// name. 1908 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1909 1910 /// \brief Retrieve the source range covering the nested-name-specifier 1911 /// that qualifies the member name. 1912 SourceRange getQualifierRange() const { return QualifierRange; } 1913 1914 /// \brief Retrieve the first part of the nested-name-specifier that was 1915 /// found in the scope of the member access expression when the member access 1916 /// was initially parsed. 1917 /// 1918 /// This function only returns a useful result when member access expression 1919 /// uses a qualified member name, e.g., "x.Base::f". Here, the declaration 1920 /// returned by this function describes what was found by unqualified name 1921 /// lookup for the identifier "Base" within the scope of the member access 1922 /// expression itself. At template instantiation time, this information is 1923 /// combined with the results of name lookup into the type of the object 1924 /// expression itself (the class type of x). 1925 NamedDecl *getFirstQualifierFoundInScope() const { 1926 return FirstQualifierFoundInScope; 1927 } 1928 1929 /// \brief Retrieve the name of the member that this expression 1930 /// refers to. 1931 DeclarationName getMember() const { return Member; } 1932 void setMember(DeclarationName N) { Member = N; } 1933 1934 // \brief Retrieve the location of the name of the member that this 1935 // expression refers to. 1936 SourceLocation getMemberLoc() const { return MemberLoc; } 1937 void setMemberLoc(SourceLocation L) { MemberLoc = L; } 1938 1939 /// \brief Determines whether this member expression actually had a C++ 1940 /// template argument list explicitly specified, e.g., x.f<int>. 1941 bool hasExplicitTemplateArgs() const { 1942 return HasExplicitTemplateArgs; 1943 } 1944 1945 /// \brief Copies the template arguments (if present) into the given 1946 /// structure. 1947 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1948 assert(HasExplicitTemplateArgs); 1949 getExplicitTemplateArgumentList()->copyInto(List); 1950 } 1951 1952 /// \brief Retrieve the location of the left angle bracket following the 1953 /// member name ('<'), if any. 1954 SourceLocation getLAngleLoc() const { 1955 assert(HasExplicitTemplateArgs); 1956 return getExplicitTemplateArgumentList()->LAngleLoc; 1957 } 1958 1959 /// \brief Retrieve the template arguments provided as part of this 1960 /// template-id. 1961 const TemplateArgumentLoc *getTemplateArgs() const { 1962 assert(HasExplicitTemplateArgs); 1963 return getExplicitTemplateArgumentList()->getTemplateArgs(); 1964 } 1965 1966 /// \brief Retrieve the number of template arguments provided as part of this 1967 /// template-id. 1968 unsigned getNumTemplateArgs() const { 1969 assert(HasExplicitTemplateArgs); 1970 return getExplicitTemplateArgumentList()->NumTemplateArgs; 1971 } 1972 1973 /// \brief Retrieve the location of the right angle bracket following the 1974 /// template arguments ('>'). 1975 SourceLocation getRAngleLoc() const { 1976 assert(HasExplicitTemplateArgs); 1977 return getExplicitTemplateArgumentList()->RAngleLoc; 1978 } 1979 1980 virtual SourceRange getSourceRange() const { 1981 SourceRange Range; 1982 if (!isImplicitAccess()) 1983 Range.setBegin(Base->getSourceRange().getBegin()); 1984 else if (getQualifier()) 1985 Range.setBegin(getQualifierRange().getBegin()); 1986 else 1987 Range.setBegin(MemberLoc); 1988 1989 if (hasExplicitTemplateArgs()) 1990 Range.setEnd(getRAngleLoc()); 1991 else 1992 Range.setEnd(MemberLoc); 1993 return Range; 1994 } 1995 1996 static bool classof(const Stmt *T) { 1997 return T->getStmtClass() == CXXDependentScopeMemberExprClass; 1998 } 1999 static bool classof(const CXXDependentScopeMemberExpr *) { return true; } 2000 2001 // Iterators 2002 virtual child_iterator child_begin(); 2003 virtual child_iterator child_end(); 2004}; 2005 2006/// \brief Represents a C++ member access expression for which lookup 2007/// produced a set of overloaded functions. 2008/// 2009/// The member access may be explicit or implicit: 2010/// struct A { 2011/// int a, b; 2012/// int explicitAccess() { return this->a + this->A::b; } 2013/// int implicitAccess() { return a + A::b; } 2014/// }; 2015/// 2016/// In the final AST, an explicit access always becomes a MemberExpr. 2017/// An implicit access may become either a MemberExpr or a 2018/// DeclRefExpr, depending on whether the member is static. 2019class UnresolvedMemberExpr : public OverloadExpr { 2020 /// \brief Whether this member expression used the '->' operator or 2021 /// the '.' operator. 2022 bool IsArrow : 1; 2023 2024 /// \brief Whether the lookup results contain an unresolved using 2025 /// declaration. 2026 bool HasUnresolvedUsing : 1; 2027 2028 /// \brief The expression for the base pointer or class reference, 2029 /// e.g., the \c x in x.f. This can be null if this is an 'unbased' 2030 /// member expression 2031 Stmt *Base; 2032 2033 /// \brief The type of the base expression; never null. 2034 QualType BaseType; 2035 2036 /// \brief The location of the '->' or '.' operator. 2037 SourceLocation OperatorLoc; 2038 2039 UnresolvedMemberExpr(QualType T, bool Dependent, 2040 bool HasUnresolvedUsing, 2041 Expr *Base, QualType BaseType, bool IsArrow, 2042 SourceLocation OperatorLoc, 2043 NestedNameSpecifier *Qualifier, 2044 SourceRange QualifierRange, 2045 DeclarationName Member, 2046 SourceLocation MemberLoc, 2047 const TemplateArgumentListInfo *TemplateArgs); 2048 2049public: 2050 static UnresolvedMemberExpr * 2051 Create(ASTContext &C, bool Dependent, bool HasUnresolvedUsing, 2052 Expr *Base, QualType BaseType, bool IsArrow, 2053 SourceLocation OperatorLoc, 2054 NestedNameSpecifier *Qualifier, 2055 SourceRange QualifierRange, 2056 DeclarationName Member, 2057 SourceLocation MemberLoc, 2058 const TemplateArgumentListInfo *TemplateArgs); 2059 2060 /// \brief True if this is an implicit access, i.e. one in which the 2061 /// member being accessed was not written in the source. The source 2062 /// location of the operator is invalid in this case. 2063 bool isImplicitAccess() const { return Base == 0; } 2064 2065 /// \brief Retrieve the base object of this member expressions, 2066 /// e.g., the \c x in \c x.m. 2067 Expr *getBase() { 2068 assert(!isImplicitAccess()); 2069 return cast<Expr>(Base); 2070 } 2071 const Expr *getBase() const { 2072 assert(!isImplicitAccess()); 2073 return cast<Expr>(Base); 2074 } 2075 void setBase(Expr *E) { Base = E; } 2076 2077 QualType getBaseType() const { return BaseType; } 2078 2079 /// \brief Determine whether this member expression used the '->' 2080 /// operator; otherwise, it used the '.' operator. 2081 bool isArrow() const { return IsArrow; } 2082 void setArrow(bool A) { IsArrow = A; } 2083 2084 /// \brief Retrieve the location of the '->' or '.' operator. 2085 SourceLocation getOperatorLoc() const { return OperatorLoc; } 2086 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 2087 2088 /// \brief Retrieves the naming class of this lookup. 2089 CXXRecordDecl *getNamingClass() const; 2090 2091 /// \brief Retrieve the name of the member that this expression 2092 /// refers to. 2093 DeclarationName getMemberName() const { return getName(); } 2094 void setMemberName(DeclarationName N) { setName(N); } 2095 2096 // \brief Retrieve the location of the name of the member that this 2097 // expression refers to. 2098 SourceLocation getMemberLoc() const { return getNameLoc(); } 2099 void setMemberLoc(SourceLocation L) { setNameLoc(L); } 2100 2101 /// \brief Retrieve the explicit template argument list that followed the 2102 /// member template name. 2103 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 2104 assert(hasExplicitTemplateArgs()); 2105 return *reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 2106 } 2107 2108 /// \brief Retrieve the explicit template argument list that followed the 2109 /// member template name, if any. 2110 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 2111 assert(hasExplicitTemplateArgs()); 2112 return *reinterpret_cast<const ExplicitTemplateArgumentList *>(this + 1); 2113 } 2114 2115 /// \brief Copies the template arguments into the given structure. 2116 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 2117 getExplicitTemplateArgs().copyInto(List); 2118 } 2119 2120 /// \brief Retrieve the location of the left angle bracket following 2121 /// the member name ('<'). 2122 SourceLocation getLAngleLoc() const { 2123 return getExplicitTemplateArgs().LAngleLoc; 2124 } 2125 2126 /// \brief Retrieve the template arguments provided as part of this 2127 /// template-id. 2128 const TemplateArgumentLoc *getTemplateArgs() const { 2129 return getExplicitTemplateArgs().getTemplateArgs(); 2130 } 2131 2132 /// \brief Retrieve the number of template arguments provided as 2133 /// part of this template-id. 2134 unsigned getNumTemplateArgs() const { 2135 return getExplicitTemplateArgs().NumTemplateArgs; 2136 } 2137 2138 /// \brief Retrieve the location of the right angle bracket 2139 /// following the template arguments ('>'). 2140 SourceLocation getRAngleLoc() const { 2141 return getExplicitTemplateArgs().RAngleLoc; 2142 } 2143 2144 virtual SourceRange getSourceRange() const { 2145 SourceRange Range; 2146 if (!isImplicitAccess()) 2147 Range.setBegin(Base->getSourceRange().getBegin()); 2148 else if (getQualifier()) 2149 Range.setBegin(getQualifierRange().getBegin()); 2150 else 2151 Range.setBegin(getMemberLoc()); 2152 2153 if (hasExplicitTemplateArgs()) 2154 Range.setEnd(getRAngleLoc()); 2155 else 2156 Range.setEnd(getMemberLoc()); 2157 return Range; 2158 } 2159 2160 static bool classof(const Stmt *T) { 2161 return T->getStmtClass() == UnresolvedMemberExprClass; 2162 } 2163 static bool classof(const UnresolvedMemberExpr *) { return true; } 2164 2165 // Iterators 2166 virtual child_iterator child_begin(); 2167 virtual child_iterator child_end(); 2168}; 2169 2170inline ExplicitTemplateArgumentList &OverloadExpr::getExplicitTemplateArgs() { 2171 if (isa<UnresolvedLookupExpr>(this)) 2172 return cast<UnresolvedLookupExpr>(this)->getExplicitTemplateArgs(); 2173 else 2174 return cast<UnresolvedMemberExpr>(this)->getExplicitTemplateArgs(); 2175} 2176 2177} // end namespace clang 2178 2179#endif 2180