ExprCXX.h revision 24eb78e38aba55c507bc3c05c37035a9ab2defa7
1//===--- ExprCXX.h - Classes for representing expressions -------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Expr interface and subclasses for C++ expressions. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_EXPRCXX_H 15#define LLVM_CLANG_AST_EXPRCXX_H 16 17#include "clang/Basic/TypeTraits.h" 18#include "clang/AST/Expr.h" 19#include "clang/AST/UnresolvedSet.h" 20#include "clang/AST/TemplateBase.h" 21 22namespace clang { 23 24 class CXXConstructorDecl; 25 class CXXDestructorDecl; 26 class CXXMethodDecl; 27 class CXXTemporary; 28 class TemplateArgumentListInfo; 29 30//===--------------------------------------------------------------------===// 31// C++ Expressions. 32//===--------------------------------------------------------------------===// 33 34/// \brief A call to an overloaded operator written using operator 35/// syntax. 36/// 37/// Represents a call to an overloaded operator written using operator 38/// syntax, e.g., "x + y" or "*p". While semantically equivalent to a 39/// normal call, this AST node provides better information about the 40/// syntactic representation of the call. 41/// 42/// In a C++ template, this expression node kind will be used whenever 43/// any of the arguments are type-dependent. In this case, the 44/// function itself will be a (possibly empty) set of functions and 45/// function templates that were found by name lookup at template 46/// definition time. 47class CXXOperatorCallExpr : public CallExpr { 48 /// \brief The overloaded operator. 49 OverloadedOperatorKind Operator; 50 51public: 52 CXXOperatorCallExpr(ASTContext& C, OverloadedOperatorKind Op, Expr *fn, 53 Expr **args, unsigned numargs, QualType t, 54 SourceLocation operatorloc) 55 : CallExpr(C, CXXOperatorCallExprClass, fn, args, numargs, t, operatorloc), 56 Operator(Op) {} 57 explicit CXXOperatorCallExpr(ASTContext& C, EmptyShell Empty) : 58 CallExpr(C, CXXOperatorCallExprClass, Empty) { } 59 60 61 /// getOperator - Returns the kind of overloaded operator that this 62 /// expression refers to. 63 OverloadedOperatorKind getOperator() const { return Operator; } 64 void setOperator(OverloadedOperatorKind Kind) { Operator = Kind; } 65 66 /// getOperatorLoc - Returns the location of the operator symbol in 67 /// the expression. When @c getOperator()==OO_Call, this is the 68 /// location of the right parentheses; when @c 69 /// getOperator()==OO_Subscript, this is the location of the right 70 /// bracket. 71 SourceLocation getOperatorLoc() const { return getRParenLoc(); } 72 73 virtual SourceRange getSourceRange() const; 74 75 static bool classof(const Stmt *T) { 76 return T->getStmtClass() == CXXOperatorCallExprClass; 77 } 78 static bool classof(const CXXOperatorCallExpr *) { return true; } 79}; 80 81/// CXXMemberCallExpr - Represents a call to a member function that 82/// may be written either with member call syntax (e.g., "obj.func()" 83/// or "objptr->func()") or with normal function-call syntax 84/// ("func()") within a member function that ends up calling a member 85/// function. The callee in either case is a MemberExpr that contains 86/// both the object argument and the member function, while the 87/// arguments are the arguments within the parentheses (not including 88/// the object argument). 89class CXXMemberCallExpr : public CallExpr { 90public: 91 CXXMemberCallExpr(ASTContext& C, Expr *fn, Expr **args, unsigned numargs, 92 QualType t, SourceLocation rparenloc) 93 : CallExpr(C, CXXMemberCallExprClass, fn, args, numargs, t, rparenloc) {} 94 95 /// getImplicitObjectArgument - Retrieves the implicit object 96 /// argument for the member call. For example, in "x.f(5)", this 97 /// operation would return "x". 98 Expr *getImplicitObjectArgument(); 99 100 virtual SourceRange getSourceRange() const; 101 102 static bool classof(const Stmt *T) { 103 return T->getStmtClass() == CXXMemberCallExprClass; 104 } 105 static bool classof(const CXXMemberCallExpr *) { return true; } 106}; 107 108/// CXXNamedCastExpr - Abstract class common to all of the C++ "named" 109/// casts, @c static_cast, @c dynamic_cast, @c reinterpret_cast, or @c 110/// const_cast. 111/// 112/// This abstract class is inherited by all of the classes 113/// representing "named" casts, e.g., CXXStaticCastExpr, 114/// CXXDynamicCastExpr, CXXReinterpretCastExpr, and CXXConstCastExpr. 115class CXXNamedCastExpr : public ExplicitCastExpr { 116private: 117 SourceLocation Loc; // the location of the casting op 118 119protected: 120 CXXNamedCastExpr(StmtClass SC, QualType ty, CastKind kind, Expr *op, 121 CXXBaseSpecifierArray BasePath, TypeSourceInfo *writtenTy, 122 SourceLocation l) 123 : ExplicitCastExpr(SC, ty, kind, op, BasePath, writtenTy), Loc(l) {} 124 125 explicit CXXNamedCastExpr(StmtClass SC, EmptyShell Shell) 126 : ExplicitCastExpr(SC, Shell) { } 127 128public: 129 const char *getCastName() const; 130 131 /// \brief Retrieve the location of the cast operator keyword, e.g., 132 /// "static_cast". 133 SourceLocation getOperatorLoc() const { return Loc; } 134 void setOperatorLoc(SourceLocation L) { Loc = L; } 135 136 virtual SourceRange getSourceRange() const { 137 return SourceRange(Loc, getSubExpr()->getSourceRange().getEnd()); 138 } 139 static bool classof(const Stmt *T) { 140 switch (T->getStmtClass()) { 141 case CXXStaticCastExprClass: 142 case CXXDynamicCastExprClass: 143 case CXXReinterpretCastExprClass: 144 case CXXConstCastExprClass: 145 return true; 146 default: 147 return false; 148 } 149 } 150 static bool classof(const CXXNamedCastExpr *) { return true; } 151}; 152 153/// CXXStaticCastExpr - A C++ @c static_cast expression (C++ [expr.static.cast]). 154/// 155/// This expression node represents a C++ static cast, e.g., 156/// @c static_cast<int>(1.0). 157class CXXStaticCastExpr : public CXXNamedCastExpr { 158public: 159 CXXStaticCastExpr(QualType ty, CastKind kind, Expr *op, 160 CXXBaseSpecifierArray BasePath, TypeSourceInfo *writtenTy, 161 SourceLocation l) 162 : CXXNamedCastExpr(CXXStaticCastExprClass, ty, kind, op, BasePath, writtenTy, l) {} 163 164 explicit CXXStaticCastExpr(EmptyShell Empty) 165 : CXXNamedCastExpr(CXXStaticCastExprClass, Empty) { } 166 167 static bool classof(const Stmt *T) { 168 return T->getStmtClass() == CXXStaticCastExprClass; 169 } 170 static bool classof(const CXXStaticCastExpr *) { return true; } 171}; 172 173/// CXXDynamicCastExpr - A C++ @c dynamic_cast expression 174/// (C++ [expr.dynamic.cast]), which may perform a run-time check to 175/// determine how to perform the type cast. 176/// 177/// This expression node represents a dynamic cast, e.g., 178/// @c dynamic_cast<Derived*>(BasePtr). 179class CXXDynamicCastExpr : public CXXNamedCastExpr { 180public: 181 CXXDynamicCastExpr(QualType ty, CastKind kind, Expr *op, 182 CXXBaseSpecifierArray BasePath, TypeSourceInfo *writtenTy, 183 SourceLocation l) 184 : CXXNamedCastExpr(CXXDynamicCastExprClass, ty, kind, op, BasePath, 185 writtenTy, l) {} 186 187 explicit CXXDynamicCastExpr(EmptyShell Empty) 188 : CXXNamedCastExpr(CXXDynamicCastExprClass, Empty) { } 189 190 static bool classof(const Stmt *T) { 191 return T->getStmtClass() == CXXDynamicCastExprClass; 192 } 193 static bool classof(const CXXDynamicCastExpr *) { return true; } 194}; 195 196/// CXXReinterpretCastExpr - A C++ @c reinterpret_cast expression (C++ 197/// [expr.reinterpret.cast]), which provides a differently-typed view 198/// of a value but performs no actual work at run time. 199/// 200/// This expression node represents a reinterpret cast, e.g., 201/// @c reinterpret_cast<int>(VoidPtr). 202class CXXReinterpretCastExpr : public CXXNamedCastExpr { 203public: 204 CXXReinterpretCastExpr(QualType ty, CastKind kind, Expr *op, 205 CXXBaseSpecifierArray BasePath, 206 TypeSourceInfo *writtenTy, SourceLocation l) 207 : CXXNamedCastExpr(CXXReinterpretCastExprClass, ty, kind, op, BasePath, 208 writtenTy, l) {} 209 210 explicit CXXReinterpretCastExpr(EmptyShell Empty) 211 : CXXNamedCastExpr(CXXReinterpretCastExprClass, Empty) { } 212 213 static bool classof(const Stmt *T) { 214 return T->getStmtClass() == CXXReinterpretCastExprClass; 215 } 216 static bool classof(const CXXReinterpretCastExpr *) { return true; } 217}; 218 219/// CXXConstCastExpr - A C++ @c const_cast expression (C++ [expr.const.cast]), 220/// which can remove type qualifiers but does not change the underlying value. 221/// 222/// This expression node represents a const cast, e.g., 223/// @c const_cast<char*>(PtrToConstChar). 224class CXXConstCastExpr : public CXXNamedCastExpr { 225public: 226 CXXConstCastExpr(QualType ty, Expr *op, TypeSourceInfo *writtenTy, 227 SourceLocation l) 228 : CXXNamedCastExpr(CXXConstCastExprClass, ty, CK_NoOp, op, 229 CXXBaseSpecifierArray(), writtenTy, l) {} 230 231 explicit CXXConstCastExpr(EmptyShell Empty) 232 : CXXNamedCastExpr(CXXConstCastExprClass, Empty) { } 233 234 static bool classof(const Stmt *T) { 235 return T->getStmtClass() == CXXConstCastExprClass; 236 } 237 static bool classof(const CXXConstCastExpr *) { return true; } 238}; 239 240/// CXXBoolLiteralExpr - [C++ 2.13.5] C++ Boolean Literal. 241/// 242class CXXBoolLiteralExpr : public Expr { 243 bool Value; 244 SourceLocation Loc; 245public: 246 CXXBoolLiteralExpr(bool val, QualType Ty, SourceLocation l) : 247 Expr(CXXBoolLiteralExprClass, Ty, false, false), Value(val), Loc(l) {} 248 249 explicit CXXBoolLiteralExpr(EmptyShell Empty) 250 : Expr(CXXBoolLiteralExprClass, Empty) { } 251 252 bool getValue() const { return Value; } 253 void setValue(bool V) { Value = V; } 254 255 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 256 257 SourceLocation getLocation() const { return Loc; } 258 void setLocation(SourceLocation L) { Loc = L; } 259 260 static bool classof(const Stmt *T) { 261 return T->getStmtClass() == CXXBoolLiteralExprClass; 262 } 263 static bool classof(const CXXBoolLiteralExpr *) { return true; } 264 265 // Iterators 266 virtual child_iterator child_begin(); 267 virtual child_iterator child_end(); 268}; 269 270/// CXXNullPtrLiteralExpr - [C++0x 2.14.7] C++ Pointer Literal 271class CXXNullPtrLiteralExpr : public Expr { 272 SourceLocation Loc; 273public: 274 CXXNullPtrLiteralExpr(QualType Ty, SourceLocation l) : 275 Expr(CXXNullPtrLiteralExprClass, Ty, false, false), Loc(l) {} 276 277 explicit CXXNullPtrLiteralExpr(EmptyShell Empty) 278 : Expr(CXXNullPtrLiteralExprClass, Empty) { } 279 280 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 281 282 SourceLocation getLocation() const { return Loc; } 283 void setLocation(SourceLocation L) { Loc = L; } 284 285 static bool classof(const Stmt *T) { 286 return T->getStmtClass() == CXXNullPtrLiteralExprClass; 287 } 288 static bool classof(const CXXNullPtrLiteralExpr *) { return true; } 289 290 virtual child_iterator child_begin(); 291 virtual child_iterator child_end(); 292}; 293 294/// CXXTypeidExpr - A C++ @c typeid expression (C++ [expr.typeid]), which gets 295/// the type_info that corresponds to the supplied type, or the (possibly 296/// dynamic) type of the supplied expression. 297/// 298/// This represents code like @c typeid(int) or @c typeid(*objPtr) 299class CXXTypeidExpr : public Expr { 300private: 301 llvm::PointerUnion<Stmt *, TypeSourceInfo *> Operand; 302 SourceRange Range; 303 304public: 305 CXXTypeidExpr(QualType Ty, TypeSourceInfo *Operand, SourceRange R) 306 : Expr(CXXTypeidExprClass, Ty, 307 // typeid is never type-dependent (C++ [temp.dep.expr]p4) 308 false, 309 // typeid is value-dependent if the type or expression are dependent 310 Operand->getType()->isDependentType()), 311 Operand(Operand), Range(R) { } 312 313 CXXTypeidExpr(QualType Ty, Expr *Operand, SourceRange R) 314 : Expr(CXXTypeidExprClass, Ty, 315 // typeid is never type-dependent (C++ [temp.dep.expr]p4) 316 false, 317 // typeid is value-dependent if the type or expression are dependent 318 Operand->isTypeDependent() || Operand->isValueDependent()), 319 Operand(Operand), Range(R) { } 320 321 bool isTypeOperand() const { return Operand.is<TypeSourceInfo *>(); } 322 323 /// \brief Retrieves the type operand of this typeid() expression after 324 /// various required adjustments (removing reference types, cv-qualifiers). 325 QualType getTypeOperand() const; 326 327 /// \brief Retrieve source information for the type operand. 328 TypeSourceInfo *getTypeOperandSourceInfo() const { 329 assert(isTypeOperand() && "Cannot call getTypeOperand for typeid(expr)"); 330 return Operand.get<TypeSourceInfo *>(); 331 } 332 333 Expr* getExprOperand() const { 334 assert(!isTypeOperand() && "Cannot call getExprOperand for typeid(type)"); 335 return static_cast<Expr*>(Operand.get<Stmt *>()); 336 } 337 338 virtual SourceRange getSourceRange() const { 339 return Range; 340 } 341 static bool classof(const Stmt *T) { 342 return T->getStmtClass() == CXXTypeidExprClass; 343 } 344 static bool classof(const CXXTypeidExpr *) { return true; } 345 346 // Iterators 347 virtual child_iterator child_begin(); 348 virtual child_iterator child_end(); 349}; 350 351/// CXXThisExpr - Represents the "this" expression in C++, which is a 352/// pointer to the object on which the current member function is 353/// executing (C++ [expr.prim]p3). Example: 354/// 355/// @code 356/// class Foo { 357/// public: 358/// void bar(); 359/// void test() { this->bar(); } 360/// }; 361/// @endcode 362class CXXThisExpr : public Expr { 363 SourceLocation Loc; 364 bool Implicit : 1; 365 366public: 367 CXXThisExpr(SourceLocation L, QualType Type, bool isImplicit) 368 : Expr(CXXThisExprClass, Type, 369 // 'this' is type-dependent if the class type of the enclosing 370 // member function is dependent (C++ [temp.dep.expr]p2) 371 Type->isDependentType(), Type->isDependentType()), 372 Loc(L), Implicit(isImplicit) { } 373 374 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 375 376 bool isImplicit() const { return Implicit; } 377 void setImplicit(bool I) { Implicit = I; } 378 379 static bool classof(const Stmt *T) { 380 return T->getStmtClass() == CXXThisExprClass; 381 } 382 static bool classof(const CXXThisExpr *) { return true; } 383 384 // Iterators 385 virtual child_iterator child_begin(); 386 virtual child_iterator child_end(); 387}; 388 389/// CXXThrowExpr - [C++ 15] C++ Throw Expression. This handles 390/// 'throw' and 'throw' assignment-expression. When 391/// assignment-expression isn't present, Op will be null. 392/// 393class CXXThrowExpr : public Expr { 394 Stmt *Op; 395 SourceLocation ThrowLoc; 396public: 397 // Ty is the void type which is used as the result type of the 398 // exepression. The l is the location of the throw keyword. expr 399 // can by null, if the optional expression to throw isn't present. 400 CXXThrowExpr(Expr *expr, QualType Ty, SourceLocation l) : 401 Expr(CXXThrowExprClass, Ty, false, false), Op(expr), ThrowLoc(l) {} 402 const Expr *getSubExpr() const { return cast_or_null<Expr>(Op); } 403 Expr *getSubExpr() { return cast_or_null<Expr>(Op); } 404 void setSubExpr(Expr *E) { Op = E; } 405 406 SourceLocation getThrowLoc() const { return ThrowLoc; } 407 void setThrowLoc(SourceLocation L) { ThrowLoc = L; } 408 409 virtual SourceRange getSourceRange() const { 410 if (getSubExpr() == 0) 411 return SourceRange(ThrowLoc, ThrowLoc); 412 return SourceRange(ThrowLoc, getSubExpr()->getSourceRange().getEnd()); 413 } 414 415 static bool classof(const Stmt *T) { 416 return T->getStmtClass() == CXXThrowExprClass; 417 } 418 static bool classof(const CXXThrowExpr *) { return true; } 419 420 // Iterators 421 virtual child_iterator child_begin(); 422 virtual child_iterator child_end(); 423}; 424 425/// CXXDefaultArgExpr - C++ [dcl.fct.default]. This wraps up a 426/// function call argument that was created from the corresponding 427/// parameter's default argument, when the call did not explicitly 428/// supply arguments for all of the parameters. 429class CXXDefaultArgExpr : public Expr { 430 /// \brief The parameter whose default is being used. 431 /// 432 /// When the bit is set, the subexpression is stored after the 433 /// CXXDefaultArgExpr itself. When the bit is clear, the parameter's 434 /// actual default expression is the subexpression. 435 llvm::PointerIntPair<ParmVarDecl *, 1, bool> Param; 436 437 /// \brief The location where the default argument expression was used. 438 SourceLocation Loc; 439 440protected: 441 CXXDefaultArgExpr(StmtClass SC, SourceLocation Loc, ParmVarDecl *param) 442 : Expr(SC, 443 param->hasUnparsedDefaultArg() 444 ? param->getType().getNonReferenceType() 445 : param->getDefaultArg()->getType(), 446 false, false), 447 Param(param, false), Loc(Loc) { } 448 449 CXXDefaultArgExpr(StmtClass SC, SourceLocation Loc, ParmVarDecl *param, 450 Expr *SubExpr) 451 : Expr(SC, SubExpr->getType(), false, false), Param(param, true), Loc(Loc) 452 { 453 *reinterpret_cast<Expr **>(this + 1) = SubExpr; 454 } 455 456protected: 457 virtual void DoDestroy(ASTContext &C); 458 459public: 460 // Param is the parameter whose default argument is used by this 461 // expression. 462 static CXXDefaultArgExpr *Create(ASTContext &C, SourceLocation Loc, 463 ParmVarDecl *Param) { 464 return new (C) CXXDefaultArgExpr(CXXDefaultArgExprClass, Loc, Param); 465 } 466 467 // Param is the parameter whose default argument is used by this 468 // expression, and SubExpr is the expression that will actually be used. 469 static CXXDefaultArgExpr *Create(ASTContext &C, 470 SourceLocation Loc, 471 ParmVarDecl *Param, 472 Expr *SubExpr); 473 474 // Retrieve the parameter that the argument was created from. 475 const ParmVarDecl *getParam() const { return Param.getPointer(); } 476 ParmVarDecl *getParam() { return Param.getPointer(); } 477 478 // Retrieve the actual argument to the function call. 479 const Expr *getExpr() const { 480 if (Param.getInt()) 481 return *reinterpret_cast<Expr const * const*> (this + 1); 482 return getParam()->getDefaultArg(); 483 } 484 Expr *getExpr() { 485 if (Param.getInt()) 486 return *reinterpret_cast<Expr **> (this + 1); 487 return getParam()->getDefaultArg(); 488 } 489 490 /// \brief Retrieve the location where this default argument was actually 491 /// used. 492 SourceLocation getUsedLocation() const { return Loc; } 493 494 virtual SourceRange getSourceRange() const { 495 // Default argument expressions have no representation in the 496 // source, so they have an empty source range. 497 return SourceRange(); 498 } 499 500 static bool classof(const Stmt *T) { 501 return T->getStmtClass() == CXXDefaultArgExprClass; 502 } 503 static bool classof(const CXXDefaultArgExpr *) { return true; } 504 505 // Iterators 506 virtual child_iterator child_begin(); 507 virtual child_iterator child_end(); 508}; 509 510/// CXXTemporary - Represents a C++ temporary. 511class CXXTemporary { 512 /// Destructor - The destructor that needs to be called. 513 const CXXDestructorDecl *Destructor; 514 515 CXXTemporary(const CXXDestructorDecl *destructor) 516 : Destructor(destructor) { } 517 ~CXXTemporary() { } 518 519public: 520 static CXXTemporary *Create(ASTContext &C, 521 const CXXDestructorDecl *Destructor); 522 523 void Destroy(ASTContext &Ctx); 524 525 const CXXDestructorDecl *getDestructor() const { return Destructor; } 526}; 527 528/// CXXBindTemporaryExpr - Represents binding an expression to a temporary, 529/// so its destructor can be called later. 530class CXXBindTemporaryExpr : public Expr { 531 CXXTemporary *Temp; 532 533 Stmt *SubExpr; 534 535 CXXBindTemporaryExpr(CXXTemporary *temp, Expr* subexpr) 536 : Expr(CXXBindTemporaryExprClass, subexpr->getType(), false, false), 537 Temp(temp), SubExpr(subexpr) { } 538 ~CXXBindTemporaryExpr() { } 539 540protected: 541 virtual void DoDestroy(ASTContext &C); 542 543public: 544 static CXXBindTemporaryExpr *Create(ASTContext &C, CXXTemporary *Temp, 545 Expr* SubExpr); 546 547 CXXTemporary *getTemporary() { return Temp; } 548 const CXXTemporary *getTemporary() const { return Temp; } 549 550 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 551 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 552 void setSubExpr(Expr *E) { SubExpr = E; } 553 554 virtual SourceRange getSourceRange() const { 555 return SubExpr->getSourceRange(); 556 } 557 558 // Implement isa/cast/dyncast/etc. 559 static bool classof(const Stmt *T) { 560 return T->getStmtClass() == CXXBindTemporaryExprClass; 561 } 562 static bool classof(const CXXBindTemporaryExpr *) { return true; } 563 564 // Iterators 565 virtual child_iterator child_begin(); 566 virtual child_iterator child_end(); 567}; 568 569/// CXXBindReferenceExpr - Represents binding an expression to a reference. 570/// In the example: 571/// 572/// const int &i = 10; 573/// 574/// a bind reference expression is inserted to indicate that 10 is bound to 575/// a reference. (Ans also that a temporary needs to be created to hold the 576/// value). 577class CXXBindReferenceExpr : public Expr { 578 // SubExpr - The expression being bound. 579 Stmt *SubExpr; 580 581 // ExtendsLifetime - Whether binding this reference extends the lifetime of 582 // the expression being bound. FIXME: Add C++ reference. 583 bool ExtendsLifetime; 584 585 /// RequiresTemporaryCopy - Whether binding the subexpression requires a 586 /// temporary copy. 587 bool RequiresTemporaryCopy; 588 589 CXXBindReferenceExpr(Expr *subexpr, bool ExtendsLifetime, 590 bool RequiresTemporaryCopy) 591 : Expr(CXXBindReferenceExprClass, subexpr->getType(), false, false), 592 SubExpr(subexpr), ExtendsLifetime(ExtendsLifetime), 593 RequiresTemporaryCopy(RequiresTemporaryCopy) { } 594 ~CXXBindReferenceExpr() { } 595 596protected: 597 virtual void DoDestroy(ASTContext &C); 598 599public: 600 static CXXBindReferenceExpr *Create(ASTContext &C, Expr *SubExpr, 601 bool ExtendsLifetime, 602 bool RequiresTemporaryCopy); 603 604 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 605 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 606 void setSubExpr(Expr *E) { SubExpr = E; } 607 608 virtual SourceRange getSourceRange() const { 609 return SubExpr->getSourceRange(); 610 } 611 612 /// requiresTemporaryCopy - Whether binding the subexpression requires a 613 /// temporary copy. 614 bool requiresTemporaryCopy() const { return RequiresTemporaryCopy; } 615 616 // extendsLifetime - Whether binding this reference extends the lifetime of 617 // the expression being bound. FIXME: Add C++ reference. 618 bool extendsLifetime() { return ExtendsLifetime; } 619 620 // Implement isa/cast/dyncast/etc. 621 static bool classof(const Stmt *T) { 622 return T->getStmtClass() == CXXBindReferenceExprClass; 623 } 624 static bool classof(const CXXBindReferenceExpr *) { return true; } 625 626 // Iterators 627 virtual child_iterator child_begin(); 628 virtual child_iterator child_end(); 629}; 630 631/// CXXConstructExpr - Represents a call to a C++ constructor. 632class CXXConstructExpr : public Expr { 633public: 634 enum ConstructionKind { 635 CK_Complete, 636 CK_NonVirtualBase, 637 CK_VirtualBase 638 }; 639 640private: 641 CXXConstructorDecl *Constructor; 642 643 SourceLocation Loc; 644 bool Elidable : 1; 645 bool ZeroInitialization : 1; 646 unsigned ConstructKind : 2; 647 Stmt **Args; 648 unsigned NumArgs; 649 650protected: 651 CXXConstructExpr(ASTContext &C, StmtClass SC, QualType T, 652 SourceLocation Loc, 653 CXXConstructorDecl *d, bool elidable, 654 Expr **args, unsigned numargs, 655 bool ZeroInitialization = false, 656 ConstructionKind ConstructKind = CK_Complete); 657 ~CXXConstructExpr() { } 658 659 virtual void DoDestroy(ASTContext &C); 660 661public: 662 /// \brief Construct an empty C++ construction expression that will store 663 /// \p numargs arguments. 664 CXXConstructExpr(EmptyShell Empty, ASTContext &C, unsigned numargs); 665 666 static CXXConstructExpr *Create(ASTContext &C, QualType T, 667 SourceLocation Loc, 668 CXXConstructorDecl *D, bool Elidable, 669 Expr **Args, unsigned NumArgs, 670 bool ZeroInitialization = false, 671 bool BaseInitialization = false); 672 673 674 CXXConstructorDecl* getConstructor() const { return Constructor; } 675 void setConstructor(CXXConstructorDecl *C) { Constructor = C; } 676 677 SourceLocation getLocation() const { return Loc; } 678 void setLocation(SourceLocation Loc) { this->Loc = Loc; } 679 680 /// \brief Whether this construction is elidable. 681 bool isElidable() const { return Elidable; } 682 void setElidable(bool E) { Elidable = E; } 683 684 /// \brief Whether this construction first requires 685 /// zero-initialization before the initializer is called. 686 bool requiresZeroInitialization() const { return ZeroInitialization; } 687 void setRequiresZeroInitialization(bool ZeroInit) { 688 ZeroInitialization = ZeroInit; 689 } 690 691 /// \brief Determines whether this constructor is actually constructing 692 /// a base class (rather than a complete object). 693 ConstructionKind getConstructionKind() const { 694 return (ConstructionKind)ConstructKind; 695 } 696 void setConstructionKind(ConstructionKind CK) { 697 ConstructKind = CK; 698 } 699 700 typedef ExprIterator arg_iterator; 701 typedef ConstExprIterator const_arg_iterator; 702 703 arg_iterator arg_begin() { return Args; } 704 arg_iterator arg_end() { return Args + NumArgs; } 705 const_arg_iterator arg_begin() const { return Args; } 706 const_arg_iterator arg_end() const { return Args + NumArgs; } 707 708 Expr **getArgs() const { return reinterpret_cast<Expr **>(Args); } 709 unsigned getNumArgs() const { return NumArgs; } 710 711 /// getArg - Return the specified argument. 712 Expr *getArg(unsigned Arg) { 713 assert(Arg < NumArgs && "Arg access out of range!"); 714 return cast<Expr>(Args[Arg]); 715 } 716 const Expr *getArg(unsigned Arg) const { 717 assert(Arg < NumArgs && "Arg access out of range!"); 718 return cast<Expr>(Args[Arg]); 719 } 720 721 /// setArg - Set the specified argument. 722 void setArg(unsigned Arg, Expr *ArgExpr) { 723 assert(Arg < NumArgs && "Arg access out of range!"); 724 Args[Arg] = ArgExpr; 725 } 726 727 virtual SourceRange getSourceRange() const; 728 729 static bool classof(const Stmt *T) { 730 return T->getStmtClass() == CXXConstructExprClass || 731 T->getStmtClass() == CXXTemporaryObjectExprClass; 732 } 733 static bool classof(const CXXConstructExpr *) { return true; } 734 735 // Iterators 736 virtual child_iterator child_begin(); 737 virtual child_iterator child_end(); 738}; 739 740/// CXXFunctionalCastExpr - Represents an explicit C++ type conversion 741/// that uses "functional" notion (C++ [expr.type.conv]). Example: @c 742/// x = int(0.5); 743class CXXFunctionalCastExpr : public ExplicitCastExpr { 744 SourceLocation TyBeginLoc; 745 SourceLocation RParenLoc; 746public: 747 CXXFunctionalCastExpr(QualType ty, TypeSourceInfo *writtenTy, 748 SourceLocation tyBeginLoc, CastKind kind, 749 Expr *castExpr, CXXBaseSpecifierArray BasePath, 750 SourceLocation rParenLoc) 751 : ExplicitCastExpr(CXXFunctionalCastExprClass, ty, kind, castExpr, 752 BasePath, writtenTy), 753 TyBeginLoc(tyBeginLoc), RParenLoc(rParenLoc) {} 754 755 explicit CXXFunctionalCastExpr(EmptyShell Shell) 756 : ExplicitCastExpr(CXXFunctionalCastExprClass, Shell) { } 757 758 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 759 void setTypeBeginLoc(SourceLocation L) { TyBeginLoc = L; } 760 SourceLocation getRParenLoc() const { return RParenLoc; } 761 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 762 763 virtual SourceRange getSourceRange() const { 764 return SourceRange(TyBeginLoc, RParenLoc); 765 } 766 static bool classof(const Stmt *T) { 767 return T->getStmtClass() == CXXFunctionalCastExprClass; 768 } 769 static bool classof(const CXXFunctionalCastExpr *) { return true; } 770}; 771 772/// @brief Represents a C++ functional cast expression that builds a 773/// temporary object. 774/// 775/// This expression type represents a C++ "functional" cast 776/// (C++[expr.type.conv]) with N != 1 arguments that invokes a 777/// constructor to build a temporary object. If N == 0 but no 778/// constructor will be called (because the functional cast is 779/// performing a value-initialized an object whose class type has no 780/// user-declared constructors), CXXZeroInitValueExpr will represent 781/// the functional cast. Finally, with N == 1 arguments the functional 782/// cast expression will be represented by CXXFunctionalCastExpr. 783/// Example: 784/// @code 785/// struct X { X(int, float); } 786/// 787/// X create_X() { 788/// return X(1, 3.14f); // creates a CXXTemporaryObjectExpr 789/// }; 790/// @endcode 791class CXXTemporaryObjectExpr : public CXXConstructExpr { 792 SourceLocation TyBeginLoc; 793 SourceLocation RParenLoc; 794 795public: 796 CXXTemporaryObjectExpr(ASTContext &C, CXXConstructorDecl *Cons, 797 QualType writtenTy, SourceLocation tyBeginLoc, 798 Expr **Args,unsigned NumArgs, 799 SourceLocation rParenLoc, 800 bool ZeroInitialization = false); 801 802 ~CXXTemporaryObjectExpr() { } 803 804 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 805 SourceLocation getRParenLoc() const { return RParenLoc; } 806 807 virtual SourceRange getSourceRange() const { 808 return SourceRange(TyBeginLoc, RParenLoc); 809 } 810 static bool classof(const Stmt *T) { 811 return T->getStmtClass() == CXXTemporaryObjectExprClass; 812 } 813 static bool classof(const CXXTemporaryObjectExpr *) { return true; } 814}; 815 816/// CXXZeroInitValueExpr - [C++ 5.2.3p2] 817/// Expression "T()" which creates a value-initialized rvalue of type 818/// T, which is either a non-class type or a class type without any 819/// user-defined constructors. 820/// 821class CXXZeroInitValueExpr : public Expr { 822 SourceLocation TyBeginLoc; 823 SourceLocation RParenLoc; 824 825public: 826 CXXZeroInitValueExpr(QualType ty, SourceLocation tyBeginLoc, 827 SourceLocation rParenLoc ) : 828 Expr(CXXZeroInitValueExprClass, ty, false, false), 829 TyBeginLoc(tyBeginLoc), RParenLoc(rParenLoc) {} 830 831 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 832 SourceLocation getRParenLoc() const { return RParenLoc; } 833 834 /// @brief Whether this initialization expression was 835 /// implicitly-generated. 836 bool isImplicit() const { 837 return TyBeginLoc.isInvalid() && RParenLoc.isInvalid(); 838 } 839 840 virtual SourceRange getSourceRange() const { 841 return SourceRange(TyBeginLoc, RParenLoc); 842 } 843 844 static bool classof(const Stmt *T) { 845 return T->getStmtClass() == CXXZeroInitValueExprClass; 846 } 847 static bool classof(const CXXZeroInitValueExpr *) { return true; } 848 849 // Iterators 850 virtual child_iterator child_begin(); 851 virtual child_iterator child_end(); 852}; 853 854/// CXXNewExpr - A new expression for memory allocation and constructor calls, 855/// e.g: "new CXXNewExpr(foo)". 856class CXXNewExpr : public Expr { 857 // Was the usage ::new, i.e. is the global new to be used? 858 bool GlobalNew : 1; 859 // Was the form (type-id) used? Otherwise, it was new-type-id. 860 bool ParenTypeId : 1; 861 // Is there an initializer? If not, built-ins are uninitialized, else they're 862 // value-initialized. 863 bool Initializer : 1; 864 // Do we allocate an array? If so, the first SubExpr is the size expression. 865 bool Array : 1; 866 // The number of placement new arguments. 867 unsigned NumPlacementArgs : 14; 868 // The number of constructor arguments. This may be 1 even for non-class 869 // types; use the pseudo copy constructor. 870 unsigned NumConstructorArgs : 14; 871 // Contains an optional array size expression, any number of optional 872 // placement arguments, and any number of optional constructor arguments, 873 // in that order. 874 Stmt **SubExprs; 875 // Points to the allocation function used. 876 FunctionDecl *OperatorNew; 877 // Points to the deallocation function used in case of error. May be null. 878 FunctionDecl *OperatorDelete; 879 // Points to the constructor used. Cannot be null if AllocType is a record; 880 // it would still point at the default constructor (even an implicit one). 881 // Must be null for all other types. 882 CXXConstructorDecl *Constructor; 883 884 SourceLocation StartLoc; 885 SourceLocation EndLoc; 886 887public: 888 CXXNewExpr(ASTContext &C, bool globalNew, FunctionDecl *operatorNew, 889 Expr **placementArgs, unsigned numPlaceArgs, bool ParenTypeId, 890 Expr *arraySize, CXXConstructorDecl *constructor, bool initializer, 891 Expr **constructorArgs, unsigned numConsArgs, 892 FunctionDecl *operatorDelete, QualType ty, 893 SourceLocation startLoc, SourceLocation endLoc); 894 895 virtual void DoDestroy(ASTContext &C); 896 897 QualType getAllocatedType() const { 898 assert(getType()->isPointerType()); 899 return getType()->getAs<PointerType>()->getPointeeType(); 900 } 901 902 FunctionDecl *getOperatorNew() const { return OperatorNew; } 903 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 904 CXXConstructorDecl *getConstructor() const { return Constructor; } 905 906 bool isArray() const { return Array; } 907 Expr *getArraySize() { 908 return Array ? cast<Expr>(SubExprs[0]) : 0; 909 } 910 const Expr *getArraySize() const { 911 return Array ? cast<Expr>(SubExprs[0]) : 0; 912 } 913 914 unsigned getNumPlacementArgs() const { return NumPlacementArgs; } 915 Expr *getPlacementArg(unsigned i) { 916 assert(i < NumPlacementArgs && "Index out of range"); 917 return cast<Expr>(SubExprs[Array + i]); 918 } 919 const Expr *getPlacementArg(unsigned i) const { 920 assert(i < NumPlacementArgs && "Index out of range"); 921 return cast<Expr>(SubExprs[Array + i]); 922 } 923 924 bool isGlobalNew() const { return GlobalNew; } 925 bool isParenTypeId() const { return ParenTypeId; } 926 bool hasInitializer() const { return Initializer; } 927 928 unsigned getNumConstructorArgs() const { return NumConstructorArgs; } 929 Expr *getConstructorArg(unsigned i) { 930 assert(i < NumConstructorArgs && "Index out of range"); 931 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 932 } 933 const Expr *getConstructorArg(unsigned i) const { 934 assert(i < NumConstructorArgs && "Index out of range"); 935 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 936 } 937 938 typedef ExprIterator arg_iterator; 939 typedef ConstExprIterator const_arg_iterator; 940 941 arg_iterator placement_arg_begin() { 942 return SubExprs + Array; 943 } 944 arg_iterator placement_arg_end() { 945 return SubExprs + Array + getNumPlacementArgs(); 946 } 947 const_arg_iterator placement_arg_begin() const { 948 return SubExprs + Array; 949 } 950 const_arg_iterator placement_arg_end() const { 951 return SubExprs + Array + getNumPlacementArgs(); 952 } 953 954 arg_iterator constructor_arg_begin() { 955 return SubExprs + Array + getNumPlacementArgs(); 956 } 957 arg_iterator constructor_arg_end() { 958 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 959 } 960 const_arg_iterator constructor_arg_begin() const { 961 return SubExprs + Array + getNumPlacementArgs(); 962 } 963 const_arg_iterator constructor_arg_end() const { 964 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 965 } 966 967 virtual SourceRange getSourceRange() const { 968 return SourceRange(StartLoc, EndLoc); 969 } 970 971 static bool classof(const Stmt *T) { 972 return T->getStmtClass() == CXXNewExprClass; 973 } 974 static bool classof(const CXXNewExpr *) { return true; } 975 976 // Iterators 977 virtual child_iterator child_begin(); 978 virtual child_iterator child_end(); 979}; 980 981/// CXXDeleteExpr - A delete expression for memory deallocation and destructor 982/// calls, e.g. "delete[] pArray". 983class CXXDeleteExpr : public Expr { 984 // Is this a forced global delete, i.e. "::delete"? 985 bool GlobalDelete : 1; 986 // Is this the array form of delete, i.e. "delete[]"? 987 bool ArrayForm : 1; 988 // Points to the operator delete overload that is used. Could be a member. 989 FunctionDecl *OperatorDelete; 990 // The pointer expression to be deleted. 991 Stmt *Argument; 992 // Location of the expression. 993 SourceLocation Loc; 994public: 995 CXXDeleteExpr(QualType ty, bool globalDelete, bool arrayForm, 996 FunctionDecl *operatorDelete, Expr *arg, SourceLocation loc) 997 : Expr(CXXDeleteExprClass, ty, false, false), GlobalDelete(globalDelete), 998 ArrayForm(arrayForm), OperatorDelete(operatorDelete), Argument(arg), 999 Loc(loc) { } 1000 1001 bool isGlobalDelete() const { return GlobalDelete; } 1002 bool isArrayForm() const { return ArrayForm; } 1003 1004 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 1005 1006 Expr *getArgument() { return cast<Expr>(Argument); } 1007 const Expr *getArgument() const { return cast<Expr>(Argument); } 1008 1009 virtual SourceRange getSourceRange() const { 1010 return SourceRange(Loc, Argument->getLocEnd()); 1011 } 1012 1013 static bool classof(const Stmt *T) { 1014 return T->getStmtClass() == CXXDeleteExprClass; 1015 } 1016 static bool classof(const CXXDeleteExpr *) { return true; } 1017 1018 // Iterators 1019 virtual child_iterator child_begin(); 1020 virtual child_iterator child_end(); 1021}; 1022 1023/// \brief Structure used to store the type being destroyed by a 1024/// pseudo-destructor expression. 1025class PseudoDestructorTypeStorage { 1026 /// \brief Either the type source information or the name of the type, if 1027 /// it couldn't be resolved due to type-dependence. 1028 llvm::PointerUnion<TypeSourceInfo *, IdentifierInfo *> Type; 1029 1030 /// \brief The starting source location of the pseudo-destructor type. 1031 SourceLocation Location; 1032 1033public: 1034 PseudoDestructorTypeStorage() { } 1035 1036 PseudoDestructorTypeStorage(IdentifierInfo *II, SourceLocation Loc) 1037 : Type(II), Location(Loc) { } 1038 1039 PseudoDestructorTypeStorage(TypeSourceInfo *Info); 1040 1041 TypeSourceInfo *getTypeSourceInfo() const { 1042 return Type.dyn_cast<TypeSourceInfo *>(); 1043 } 1044 1045 IdentifierInfo *getIdentifier() const { 1046 return Type.dyn_cast<IdentifierInfo *>(); 1047 } 1048 1049 SourceLocation getLocation() const { return Location; } 1050}; 1051 1052/// \brief Represents a C++ pseudo-destructor (C++ [expr.pseudo]). 1053/// 1054/// A pseudo-destructor is an expression that looks like a member access to a 1055/// destructor of a scalar type, except that scalar types don't have 1056/// destructors. For example: 1057/// 1058/// \code 1059/// typedef int T; 1060/// void f(int *p) { 1061/// p->T::~T(); 1062/// } 1063/// \endcode 1064/// 1065/// Pseudo-destructors typically occur when instantiating templates such as: 1066/// 1067/// \code 1068/// template<typename T> 1069/// void destroy(T* ptr) { 1070/// ptr->T::~T(); 1071/// } 1072/// \endcode 1073/// 1074/// for scalar types. A pseudo-destructor expression has no run-time semantics 1075/// beyond evaluating the base expression. 1076class CXXPseudoDestructorExpr : public Expr { 1077 /// \brief The base expression (that is being destroyed). 1078 Stmt *Base; 1079 1080 /// \brief Whether the operator was an arrow ('->'); otherwise, it was a 1081 /// period ('.'). 1082 bool IsArrow : 1; 1083 1084 /// \brief The location of the '.' or '->' operator. 1085 SourceLocation OperatorLoc; 1086 1087 /// \brief The nested-name-specifier that follows the operator, if present. 1088 NestedNameSpecifier *Qualifier; 1089 1090 /// \brief The source range that covers the nested-name-specifier, if 1091 /// present. 1092 SourceRange QualifierRange; 1093 1094 /// \brief The type that precedes the '::' in a qualified pseudo-destructor 1095 /// expression. 1096 TypeSourceInfo *ScopeType; 1097 1098 /// \brief The location of the '::' in a qualified pseudo-destructor 1099 /// expression. 1100 SourceLocation ColonColonLoc; 1101 1102 /// \brief The location of the '~'. 1103 SourceLocation TildeLoc; 1104 1105 /// \brief The type being destroyed, or its name if we were unable to 1106 /// resolve the name. 1107 PseudoDestructorTypeStorage DestroyedType; 1108 1109public: 1110 CXXPseudoDestructorExpr(ASTContext &Context, 1111 Expr *Base, bool isArrow, SourceLocation OperatorLoc, 1112 NestedNameSpecifier *Qualifier, 1113 SourceRange QualifierRange, 1114 TypeSourceInfo *ScopeType, 1115 SourceLocation ColonColonLoc, 1116 SourceLocation TildeLoc, 1117 PseudoDestructorTypeStorage DestroyedType) 1118 : Expr(CXXPseudoDestructorExprClass, 1119 Context.getPointerType(Context.getFunctionType(Context.VoidTy, 0, 0, 1120 false, 0, false, 1121 false, 0, 0, 1122 FunctionType::ExtInfo())), 1123 /*isTypeDependent=*/(Base->isTypeDependent() || 1124 (DestroyedType.getTypeSourceInfo() && 1125 DestroyedType.getTypeSourceInfo()->getType()->isDependentType())), 1126 /*isValueDependent=*/Base->isValueDependent()), 1127 Base(static_cast<Stmt *>(Base)), IsArrow(isArrow), 1128 OperatorLoc(OperatorLoc), Qualifier(Qualifier), 1129 QualifierRange(QualifierRange), 1130 ScopeType(ScopeType), ColonColonLoc(ColonColonLoc), TildeLoc(TildeLoc), 1131 DestroyedType(DestroyedType) { } 1132 1133 void setBase(Expr *E) { Base = E; } 1134 Expr *getBase() const { return cast<Expr>(Base); } 1135 1136 /// \brief Determines whether this member expression actually had 1137 /// a C++ nested-name-specifier prior to the name of the member, e.g., 1138 /// x->Base::foo. 1139 bool hasQualifier() const { return Qualifier != 0; } 1140 1141 /// \brief If the member name was qualified, retrieves the source range of 1142 /// the nested-name-specifier that precedes the member name. Otherwise, 1143 /// returns an empty source range. 1144 SourceRange getQualifierRange() const { return QualifierRange; } 1145 1146 /// \brief If the member name was qualified, retrieves the 1147 /// nested-name-specifier that precedes the member name. Otherwise, returns 1148 /// NULL. 1149 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1150 1151 /// \brief Determine whether this pseudo-destructor expression was written 1152 /// using an '->' (otherwise, it used a '.'). 1153 bool isArrow() const { return IsArrow; } 1154 void setArrow(bool A) { IsArrow = A; } 1155 1156 /// \brief Retrieve the location of the '.' or '->' operator. 1157 SourceLocation getOperatorLoc() const { return OperatorLoc; } 1158 1159 /// \brief Retrieve the scope type in a qualified pseudo-destructor 1160 /// expression. 1161 /// 1162 /// Pseudo-destructor expressions can have extra qualification within them 1163 /// that is not part of the nested-name-specifier, e.g., \c p->T::~T(). 1164 /// Here, if the object type of the expression is (or may be) a scalar type, 1165 /// \p T may also be a scalar type and, therefore, cannot be part of a 1166 /// nested-name-specifier. It is stored as the "scope type" of the pseudo- 1167 /// destructor expression. 1168 TypeSourceInfo *getScopeTypeInfo() const { return ScopeType; } 1169 1170 /// \brief Retrieve the location of the '::' in a qualified pseudo-destructor 1171 /// expression. 1172 SourceLocation getColonColonLoc() const { return ColonColonLoc; } 1173 1174 /// \brief Retrieve the location of the '~'. 1175 SourceLocation getTildeLoc() const { return TildeLoc; } 1176 1177 /// \brief Retrieve the source location information for the type 1178 /// being destroyed. 1179 /// 1180 /// This type-source information is available for non-dependent 1181 /// pseudo-destructor expressions and some dependent pseudo-destructor 1182 /// expressions. Returns NULL if we only have the identifier for a 1183 /// dependent pseudo-destructor expression. 1184 TypeSourceInfo *getDestroyedTypeInfo() const { 1185 return DestroyedType.getTypeSourceInfo(); 1186 } 1187 1188 /// \brief In a dependent pseudo-destructor expression for which we do not 1189 /// have full type information on the destroyed type, provides the name 1190 /// of the destroyed type. 1191 IdentifierInfo *getDestroyedTypeIdentifier() const { 1192 return DestroyedType.getIdentifier(); 1193 } 1194 1195 /// \brief Retrieve the type being destroyed. 1196 QualType getDestroyedType() const; 1197 1198 /// \brief Retrieve the starting location of the type being destroyed. 1199 SourceLocation getDestroyedTypeLoc() const { 1200 return DestroyedType.getLocation(); 1201 } 1202 1203 virtual SourceRange getSourceRange() const; 1204 1205 static bool classof(const Stmt *T) { 1206 return T->getStmtClass() == CXXPseudoDestructorExprClass; 1207 } 1208 static bool classof(const CXXPseudoDestructorExpr *) { return true; } 1209 1210 // Iterators 1211 virtual child_iterator child_begin(); 1212 virtual child_iterator child_end(); 1213}; 1214 1215/// UnaryTypeTraitExpr - A GCC or MS unary type trait, as used in the 1216/// implementation of TR1/C++0x type trait templates. 1217/// Example: 1218/// __is_pod(int) == true 1219/// __is_enum(std::string) == false 1220class UnaryTypeTraitExpr : public Expr { 1221 /// UTT - The trait. 1222 UnaryTypeTrait UTT; 1223 1224 /// Loc - The location of the type trait keyword. 1225 SourceLocation Loc; 1226 1227 /// RParen - The location of the closing paren. 1228 SourceLocation RParen; 1229 1230 /// QueriedType - The type we're testing. 1231 QualType QueriedType; 1232 1233public: 1234 UnaryTypeTraitExpr(SourceLocation loc, UnaryTypeTrait utt, QualType queried, 1235 SourceLocation rparen, QualType ty) 1236 : Expr(UnaryTypeTraitExprClass, ty, false, queried->isDependentType()), 1237 UTT(utt), Loc(loc), RParen(rparen), QueriedType(queried) { } 1238 1239 virtual SourceRange getSourceRange() const { return SourceRange(Loc, RParen);} 1240 1241 UnaryTypeTrait getTrait() const { return UTT; } 1242 1243 QualType getQueriedType() const { return QueriedType; } 1244 1245 bool EvaluateTrait(ASTContext&) const; 1246 1247 static bool classof(const Stmt *T) { 1248 return T->getStmtClass() == UnaryTypeTraitExprClass; 1249 } 1250 static bool classof(const UnaryTypeTraitExpr *) { return true; } 1251 1252 // Iterators 1253 virtual child_iterator child_begin(); 1254 virtual child_iterator child_end(); 1255}; 1256 1257/// \brief A reference to an overloaded function set, either an 1258/// \t UnresolvedLookupExpr or an \t UnresolvedMemberExpr. 1259class OverloadExpr : public Expr { 1260 /// The results. These are undesugared, which is to say, they may 1261 /// include UsingShadowDecls. Access is relative to the naming 1262 /// class. 1263 UnresolvedSet<4> Results; 1264 1265 /// The common name of these declarations. 1266 DeclarationName Name; 1267 1268 /// The scope specifier, if any. 1269 NestedNameSpecifier *Qualifier; 1270 1271 /// The source range of the scope specifier. 1272 SourceRange QualifierRange; 1273 1274 /// The location of the name. 1275 SourceLocation NameLoc; 1276 1277 /// True if the name was a template-id. 1278 bool HasExplicitTemplateArgs; 1279 1280protected: 1281 OverloadExpr(StmtClass K, QualType T, bool Dependent, 1282 NestedNameSpecifier *Qualifier, SourceRange QRange, 1283 DeclarationName Name, SourceLocation NameLoc, 1284 bool HasTemplateArgs) 1285 : Expr(K, T, Dependent, Dependent), 1286 Name(Name), Qualifier(Qualifier), QualifierRange(QRange), 1287 NameLoc(NameLoc), HasExplicitTemplateArgs(HasTemplateArgs) 1288 {} 1289 1290public: 1291 /// Computes whether an unresolved lookup on the given declarations 1292 /// and optional template arguments is type- and value-dependent. 1293 static bool ComputeDependence(UnresolvedSetIterator Begin, 1294 UnresolvedSetIterator End, 1295 const TemplateArgumentListInfo *Args); 1296 1297 /// Finds the overloaded expression in the given expression of 1298 /// OverloadTy. 1299 /// 1300 /// \return the expression (which must be there) and true if it is 1301 /// within an address-of operator. 1302 static llvm::PointerIntPair<OverloadExpr*,1> find(Expr *E) { 1303 assert(E->getType()->isSpecificBuiltinType(BuiltinType::Overload)); 1304 1305 bool op = false; 1306 E = E->IgnoreParens(); 1307 if (isa<UnaryOperator>(E)) 1308 op = true, E = cast<UnaryOperator>(E)->getSubExpr()->IgnoreParens(); 1309 return llvm::PointerIntPair<OverloadExpr*,1>(cast<OverloadExpr>(E), op); 1310 } 1311 1312 void addDecls(UnresolvedSetIterator Begin, UnresolvedSetIterator End) { 1313 Results.append(Begin, End); 1314 } 1315 1316 /// Gets the naming class of this lookup, if any. 1317 CXXRecordDecl *getNamingClass() const; 1318 1319 typedef UnresolvedSetImpl::iterator decls_iterator; 1320 decls_iterator decls_begin() const { return Results.begin(); } 1321 decls_iterator decls_end() const { return Results.end(); } 1322 1323 /// Gets the decls as an unresolved set. 1324 const UnresolvedSetImpl &getDecls() { return Results; } 1325 1326 /// Gets the number of declarations in the unresolved set. 1327 unsigned getNumDecls() const { return Results.size(); } 1328 1329 /// Gets the name looked up. 1330 DeclarationName getName() const { return Name; } 1331 void setName(DeclarationName N) { Name = N; } 1332 1333 /// Gets the location of the name. 1334 SourceLocation getNameLoc() const { return NameLoc; } 1335 void setNameLoc(SourceLocation Loc) { NameLoc = Loc; } 1336 1337 /// Fetches the nested-name qualifier, if one was given. 1338 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1339 1340 /// Fetches the range of the nested-name qualifier. 1341 SourceRange getQualifierRange() const { return QualifierRange; } 1342 1343 /// \brief Determines whether this expression had an explicit 1344 /// template argument list, e.g. f<int>. 1345 bool hasExplicitTemplateArgs() const { return HasExplicitTemplateArgs; } 1346 1347 ExplicitTemplateArgumentList &getExplicitTemplateArgs(); // defined far below 1348 1349 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1350 return const_cast<OverloadExpr*>(this)->getExplicitTemplateArgs(); 1351 } 1352 1353 ExplicitTemplateArgumentList *getOptionalExplicitTemplateArgs() { 1354 if (hasExplicitTemplateArgs()) 1355 return &getExplicitTemplateArgs(); 1356 return 0; 1357 } 1358 1359 static bool classof(const Stmt *T) { 1360 return T->getStmtClass() == UnresolvedLookupExprClass || 1361 T->getStmtClass() == UnresolvedMemberExprClass; 1362 } 1363 static bool classof(const OverloadExpr *) { return true; } 1364}; 1365 1366/// \brief A reference to a name which we were able to look up during 1367/// parsing but could not resolve to a specific declaration. This 1368/// arises in several ways: 1369/// * we might be waiting for argument-dependent lookup 1370/// * the name might resolve to an overloaded function 1371/// and eventually: 1372/// * the lookup might have included a function template 1373/// These never include UnresolvedUsingValueDecls, which are always 1374/// class members and therefore appear only in 1375/// UnresolvedMemberLookupExprs. 1376class UnresolvedLookupExpr : public OverloadExpr { 1377 /// True if these lookup results should be extended by 1378 /// argument-dependent lookup if this is the operand of a function 1379 /// call. 1380 bool RequiresADL; 1381 1382 /// True if these lookup results are overloaded. This is pretty 1383 /// trivially rederivable if we urgently need to kill this field. 1384 bool Overloaded; 1385 1386 /// The naming class (C++ [class.access.base]p5) of the lookup, if 1387 /// any. This can generally be recalculated from the context chain, 1388 /// but that can be fairly expensive for unqualified lookups. If we 1389 /// want to improve memory use here, this could go in a union 1390 /// against the qualified-lookup bits. 1391 CXXRecordDecl *NamingClass; 1392 1393 UnresolvedLookupExpr(QualType T, bool Dependent, CXXRecordDecl *NamingClass, 1394 NestedNameSpecifier *Qualifier, SourceRange QRange, 1395 DeclarationName Name, SourceLocation NameLoc, 1396 bool RequiresADL, bool Overloaded, bool HasTemplateArgs) 1397 : OverloadExpr(UnresolvedLookupExprClass, T, Dependent, Qualifier, QRange, 1398 Name, NameLoc, HasTemplateArgs), 1399 RequiresADL(RequiresADL), Overloaded(Overloaded), NamingClass(NamingClass) 1400 {} 1401 1402public: 1403 static UnresolvedLookupExpr *Create(ASTContext &C, 1404 bool Dependent, 1405 CXXRecordDecl *NamingClass, 1406 NestedNameSpecifier *Qualifier, 1407 SourceRange QualifierRange, 1408 DeclarationName Name, 1409 SourceLocation NameLoc, 1410 bool ADL, bool Overloaded) { 1411 return new(C) UnresolvedLookupExpr(Dependent ? C.DependentTy : C.OverloadTy, 1412 Dependent, NamingClass, 1413 Qualifier, QualifierRange, 1414 Name, NameLoc, ADL, Overloaded, false); 1415 } 1416 1417 static UnresolvedLookupExpr *Create(ASTContext &C, 1418 bool Dependent, 1419 CXXRecordDecl *NamingClass, 1420 NestedNameSpecifier *Qualifier, 1421 SourceRange QualifierRange, 1422 DeclarationName Name, 1423 SourceLocation NameLoc, 1424 bool ADL, 1425 const TemplateArgumentListInfo &Args); 1426 1427 /// True if this declaration should be extended by 1428 /// argument-dependent lookup. 1429 bool requiresADL() const { return RequiresADL; } 1430 1431 /// True if this lookup is overloaded. 1432 bool isOverloaded() const { return Overloaded; } 1433 1434 /// Gets the 'naming class' (in the sense of C++0x 1435 /// [class.access.base]p5) of the lookup. This is the scope 1436 /// that was looked in to find these results. 1437 CXXRecordDecl *getNamingClass() const { return NamingClass; } 1438 1439 // Note that, inconsistently with the explicit-template-argument AST 1440 // nodes, users are *forbidden* from calling these methods on objects 1441 // without explicit template arguments. 1442 1443 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 1444 assert(hasExplicitTemplateArgs()); 1445 return *reinterpret_cast<ExplicitTemplateArgumentList*>(this + 1); 1446 } 1447 1448 /// Gets a reference to the explicit template argument list. 1449 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1450 assert(hasExplicitTemplateArgs()); 1451 return *reinterpret_cast<const ExplicitTemplateArgumentList*>(this + 1); 1452 } 1453 1454 /// \brief Copies the template arguments (if present) into the given 1455 /// structure. 1456 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1457 getExplicitTemplateArgs().copyInto(List); 1458 } 1459 1460 SourceLocation getLAngleLoc() const { 1461 return getExplicitTemplateArgs().LAngleLoc; 1462 } 1463 1464 SourceLocation getRAngleLoc() const { 1465 return getExplicitTemplateArgs().RAngleLoc; 1466 } 1467 1468 TemplateArgumentLoc const *getTemplateArgs() const { 1469 return getExplicitTemplateArgs().getTemplateArgs(); 1470 } 1471 1472 unsigned getNumTemplateArgs() const { 1473 return getExplicitTemplateArgs().NumTemplateArgs; 1474 } 1475 1476 virtual SourceRange getSourceRange() const { 1477 SourceRange Range(getNameLoc()); 1478 if (getQualifier()) Range.setBegin(getQualifierRange().getBegin()); 1479 if (hasExplicitTemplateArgs()) Range.setEnd(getRAngleLoc()); 1480 return Range; 1481 } 1482 1483 virtual StmtIterator child_begin(); 1484 virtual StmtIterator child_end(); 1485 1486 static bool classof(const Stmt *T) { 1487 return T->getStmtClass() == UnresolvedLookupExprClass; 1488 } 1489 static bool classof(const UnresolvedLookupExpr *) { return true; } 1490}; 1491 1492/// \brief A qualified reference to a name whose declaration cannot 1493/// yet be resolved. 1494/// 1495/// DependentScopeDeclRefExpr is similar to DeclRefExpr in that 1496/// it expresses a reference to a declaration such as 1497/// X<T>::value. The difference, however, is that an 1498/// DependentScopeDeclRefExpr node is used only within C++ templates when 1499/// the qualification (e.g., X<T>::) refers to a dependent type. In 1500/// this case, X<T>::value cannot resolve to a declaration because the 1501/// declaration will differ from on instantiation of X<T> to the 1502/// next. Therefore, DependentScopeDeclRefExpr keeps track of the 1503/// qualifier (X<T>::) and the name of the entity being referenced 1504/// ("value"). Such expressions will instantiate to a DeclRefExpr once the 1505/// declaration can be found. 1506class DependentScopeDeclRefExpr : public Expr { 1507 /// The name of the entity we will be referencing. 1508 DeclarationName Name; 1509 1510 /// Location of the name of the declaration we're referencing. 1511 SourceLocation Loc; 1512 1513 /// QualifierRange - The source range that covers the 1514 /// nested-name-specifier. 1515 SourceRange QualifierRange; 1516 1517 /// \brief The nested-name-specifier that qualifies this unresolved 1518 /// declaration name. 1519 NestedNameSpecifier *Qualifier; 1520 1521 /// \brief Whether the name includes explicit template arguments. 1522 bool HasExplicitTemplateArgs; 1523 1524 DependentScopeDeclRefExpr(QualType T, 1525 NestedNameSpecifier *Qualifier, 1526 SourceRange QualifierRange, 1527 DeclarationName Name, 1528 SourceLocation NameLoc, 1529 bool HasExplicitTemplateArgs) 1530 : Expr(DependentScopeDeclRefExprClass, T, true, true), 1531 Name(Name), Loc(NameLoc), 1532 QualifierRange(QualifierRange), Qualifier(Qualifier), 1533 HasExplicitTemplateArgs(HasExplicitTemplateArgs) 1534 {} 1535 1536public: 1537 static DependentScopeDeclRefExpr *Create(ASTContext &C, 1538 NestedNameSpecifier *Qualifier, 1539 SourceRange QualifierRange, 1540 DeclarationName Name, 1541 SourceLocation NameLoc, 1542 const TemplateArgumentListInfo *TemplateArgs = 0); 1543 1544 /// \brief Retrieve the name that this expression refers to. 1545 DeclarationName getDeclName() const { return Name; } 1546 1547 /// \brief Retrieve the location of the name within the expression. 1548 SourceLocation getLocation() const { return Loc; } 1549 1550 /// \brief Retrieve the source range of the nested-name-specifier. 1551 SourceRange getQualifierRange() const { return QualifierRange; } 1552 1553 /// \brief Retrieve the nested-name-specifier that qualifies this 1554 /// declaration. 1555 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1556 1557 /// Determines whether this lookup had explicit template arguments. 1558 bool hasExplicitTemplateArgs() const { return HasExplicitTemplateArgs; } 1559 1560 // Note that, inconsistently with the explicit-template-argument AST 1561 // nodes, users are *forbidden* from calling these methods on objects 1562 // without explicit template arguments. 1563 1564 /// Gets a reference to the explicit template argument list. 1565 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1566 assert(hasExplicitTemplateArgs()); 1567 return *reinterpret_cast<const ExplicitTemplateArgumentList*>(this + 1); 1568 } 1569 1570 /// \brief Copies the template arguments (if present) into the given 1571 /// structure. 1572 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1573 getExplicitTemplateArgs().copyInto(List); 1574 } 1575 1576 SourceLocation getLAngleLoc() const { 1577 return getExplicitTemplateArgs().LAngleLoc; 1578 } 1579 1580 SourceLocation getRAngleLoc() const { 1581 return getExplicitTemplateArgs().RAngleLoc; 1582 } 1583 1584 TemplateArgumentLoc const *getTemplateArgs() const { 1585 return getExplicitTemplateArgs().getTemplateArgs(); 1586 } 1587 1588 unsigned getNumTemplateArgs() const { 1589 return getExplicitTemplateArgs().NumTemplateArgs; 1590 } 1591 1592 virtual SourceRange getSourceRange() const { 1593 SourceRange Range(QualifierRange.getBegin(), getLocation()); 1594 if (hasExplicitTemplateArgs()) 1595 Range.setEnd(getRAngleLoc()); 1596 return Range; 1597 } 1598 1599 static bool classof(const Stmt *T) { 1600 return T->getStmtClass() == DependentScopeDeclRefExprClass; 1601 } 1602 static bool classof(const DependentScopeDeclRefExpr *) { return true; } 1603 1604 virtual StmtIterator child_begin(); 1605 virtual StmtIterator child_end(); 1606}; 1607 1608class CXXExprWithTemporaries : public Expr { 1609 Stmt *SubExpr; 1610 1611 CXXTemporary **Temps; 1612 unsigned NumTemps; 1613 1614 CXXExprWithTemporaries(Expr *SubExpr, CXXTemporary **Temps, 1615 unsigned NumTemps); 1616 ~CXXExprWithTemporaries(); 1617 1618protected: 1619 virtual void DoDestroy(ASTContext &C); 1620 1621public: 1622 static CXXExprWithTemporaries *Create(ASTContext &C, Expr *SubExpr, 1623 CXXTemporary **Temps, 1624 unsigned NumTemps); 1625 1626 unsigned getNumTemporaries() const { return NumTemps; } 1627 CXXTemporary *getTemporary(unsigned i) { 1628 assert(i < NumTemps && "Index out of range"); 1629 return Temps[i]; 1630 } 1631 const CXXTemporary *getTemporary(unsigned i) const { 1632 return const_cast<CXXExprWithTemporaries*>(this)->getTemporary(i); 1633 } 1634 1635 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 1636 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 1637 void setSubExpr(Expr *E) { SubExpr = E; } 1638 1639 virtual SourceRange getSourceRange() const { 1640 return SubExpr->getSourceRange(); 1641 } 1642 1643 // Implement isa/cast/dyncast/etc. 1644 static bool classof(const Stmt *T) { 1645 return T->getStmtClass() == CXXExprWithTemporariesClass; 1646 } 1647 static bool classof(const CXXExprWithTemporaries *) { return true; } 1648 1649 // Iterators 1650 virtual child_iterator child_begin(); 1651 virtual child_iterator child_end(); 1652}; 1653 1654/// \brief Describes an explicit type conversion that uses functional 1655/// notion but could not be resolved because one or more arguments are 1656/// type-dependent. 1657/// 1658/// The explicit type conversions expressed by 1659/// CXXUnresolvedConstructExpr have the form \c T(a1, a2, ..., aN), 1660/// where \c T is some type and \c a1, a2, ..., aN are values, and 1661/// either \C T is a dependent type or one or more of the \c a's is 1662/// type-dependent. For example, this would occur in a template such 1663/// as: 1664/// 1665/// \code 1666/// template<typename T, typename A1> 1667/// inline T make_a(const A1& a1) { 1668/// return T(a1); 1669/// } 1670/// \endcode 1671/// 1672/// When the returned expression is instantiated, it may resolve to a 1673/// constructor call, conversion function call, or some kind of type 1674/// conversion. 1675class CXXUnresolvedConstructExpr : public Expr { 1676 /// \brief The starting location of the type 1677 SourceLocation TyBeginLoc; 1678 1679 /// \brief The type being constructed. 1680 QualType Type; 1681 1682 /// \brief The location of the left parentheses ('('). 1683 SourceLocation LParenLoc; 1684 1685 /// \brief The location of the right parentheses (')'). 1686 SourceLocation RParenLoc; 1687 1688 /// \brief The number of arguments used to construct the type. 1689 unsigned NumArgs; 1690 1691 CXXUnresolvedConstructExpr(SourceLocation TyBegin, 1692 QualType T, 1693 SourceLocation LParenLoc, 1694 Expr **Args, 1695 unsigned NumArgs, 1696 SourceLocation RParenLoc); 1697 1698public: 1699 static CXXUnresolvedConstructExpr *Create(ASTContext &C, 1700 SourceLocation TyBegin, 1701 QualType T, 1702 SourceLocation LParenLoc, 1703 Expr **Args, 1704 unsigned NumArgs, 1705 SourceLocation RParenLoc); 1706 1707 /// \brief Retrieve the source location where the type begins. 1708 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 1709 void setTypeBeginLoc(SourceLocation L) { TyBeginLoc = L; } 1710 1711 /// \brief Retrieve the type that is being constructed, as specified 1712 /// in the source code. 1713 QualType getTypeAsWritten() const { return Type; } 1714 void setTypeAsWritten(QualType T) { Type = T; } 1715 1716 /// \brief Retrieve the location of the left parentheses ('(') that 1717 /// precedes the argument list. 1718 SourceLocation getLParenLoc() const { return LParenLoc; } 1719 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 1720 1721 /// \brief Retrieve the location of the right parentheses (')') that 1722 /// follows the argument list. 1723 SourceLocation getRParenLoc() const { return RParenLoc; } 1724 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1725 1726 /// \brief Retrieve the number of arguments. 1727 unsigned arg_size() const { return NumArgs; } 1728 1729 typedef Expr** arg_iterator; 1730 arg_iterator arg_begin() { return reinterpret_cast<Expr**>(this + 1); } 1731 arg_iterator arg_end() { return arg_begin() + NumArgs; } 1732 1733 typedef const Expr* const * const_arg_iterator; 1734 const_arg_iterator arg_begin() const { 1735 return reinterpret_cast<const Expr* const *>(this + 1); 1736 } 1737 const_arg_iterator arg_end() const { 1738 return arg_begin() + NumArgs; 1739 } 1740 1741 Expr *getArg(unsigned I) { 1742 assert(I < NumArgs && "Argument index out-of-range"); 1743 return *(arg_begin() + I); 1744 } 1745 1746 const Expr *getArg(unsigned I) const { 1747 assert(I < NumArgs && "Argument index out-of-range"); 1748 return *(arg_begin() + I); 1749 } 1750 1751 virtual SourceRange getSourceRange() const { 1752 return SourceRange(TyBeginLoc, RParenLoc); 1753 } 1754 static bool classof(const Stmt *T) { 1755 return T->getStmtClass() == CXXUnresolvedConstructExprClass; 1756 } 1757 static bool classof(const CXXUnresolvedConstructExpr *) { return true; } 1758 1759 // Iterators 1760 virtual child_iterator child_begin(); 1761 virtual child_iterator child_end(); 1762}; 1763 1764/// \brief Represents a C++ member access expression where the actual 1765/// member referenced could not be resolved because the base 1766/// expression or the member name was dependent. 1767/// 1768/// Like UnresolvedMemberExprs, these can be either implicit or 1769/// explicit accesses. It is only possible to get one of these with 1770/// an implicit access if a qualifier is provided. 1771class CXXDependentScopeMemberExpr : public Expr { 1772 /// \brief The expression for the base pointer or class reference, 1773 /// e.g., the \c x in x.f. Can be null in implicit accesses. 1774 Stmt *Base; 1775 1776 /// \brief The type of the base expression. Never null, even for 1777 /// implicit accesses. 1778 QualType BaseType; 1779 1780 /// \brief Whether this member expression used the '->' operator or 1781 /// the '.' operator. 1782 bool IsArrow : 1; 1783 1784 /// \brief Whether this member expression has explicitly-specified template 1785 /// arguments. 1786 bool HasExplicitTemplateArgs : 1; 1787 1788 /// \brief The location of the '->' or '.' operator. 1789 SourceLocation OperatorLoc; 1790 1791 /// \brief The nested-name-specifier that precedes the member name, if any. 1792 NestedNameSpecifier *Qualifier; 1793 1794 /// \brief The source range covering the nested name specifier. 1795 SourceRange QualifierRange; 1796 1797 /// \brief In a qualified member access expression such as t->Base::f, this 1798 /// member stores the resolves of name lookup in the context of the member 1799 /// access expression, to be used at instantiation time. 1800 /// 1801 /// FIXME: This member, along with the Qualifier and QualifierRange, could 1802 /// be stuck into a structure that is optionally allocated at the end of 1803 /// the CXXDependentScopeMemberExpr, to save space in the common case. 1804 NamedDecl *FirstQualifierFoundInScope; 1805 1806 /// \brief The member to which this member expression refers, which 1807 /// can be name, overloaded operator, or destructor. 1808 /// FIXME: could also be a template-id 1809 DeclarationName Member; 1810 1811 /// \brief The location of the member name. 1812 SourceLocation MemberLoc; 1813 1814 /// \brief Retrieve the explicit template argument list that followed the 1815 /// member template name, if any. 1816 ExplicitTemplateArgumentList *getExplicitTemplateArgumentList() { 1817 assert(HasExplicitTemplateArgs); 1818 return reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 1819 } 1820 1821 /// \brief Retrieve the explicit template argument list that followed the 1822 /// member template name, if any. 1823 const ExplicitTemplateArgumentList *getExplicitTemplateArgumentList() const { 1824 return const_cast<CXXDependentScopeMemberExpr *>(this) 1825 ->getExplicitTemplateArgumentList(); 1826 } 1827 1828 CXXDependentScopeMemberExpr(ASTContext &C, 1829 Expr *Base, QualType BaseType, bool IsArrow, 1830 SourceLocation OperatorLoc, 1831 NestedNameSpecifier *Qualifier, 1832 SourceRange QualifierRange, 1833 NamedDecl *FirstQualifierFoundInScope, 1834 DeclarationName Member, 1835 SourceLocation MemberLoc, 1836 const TemplateArgumentListInfo *TemplateArgs); 1837 1838public: 1839 CXXDependentScopeMemberExpr(ASTContext &C, 1840 Expr *Base, QualType BaseType, 1841 bool IsArrow, 1842 SourceLocation OperatorLoc, 1843 NestedNameSpecifier *Qualifier, 1844 SourceRange QualifierRange, 1845 NamedDecl *FirstQualifierFoundInScope, 1846 DeclarationName Member, 1847 SourceLocation MemberLoc) 1848 : Expr(CXXDependentScopeMemberExprClass, C.DependentTy, true, true), 1849 Base(Base), BaseType(BaseType), IsArrow(IsArrow), 1850 HasExplicitTemplateArgs(false), OperatorLoc(OperatorLoc), 1851 Qualifier(Qualifier), QualifierRange(QualifierRange), 1852 FirstQualifierFoundInScope(FirstQualifierFoundInScope), 1853 Member(Member), MemberLoc(MemberLoc) { } 1854 1855 static CXXDependentScopeMemberExpr * 1856 Create(ASTContext &C, 1857 Expr *Base, QualType BaseType, bool IsArrow, 1858 SourceLocation OperatorLoc, 1859 NestedNameSpecifier *Qualifier, 1860 SourceRange QualifierRange, 1861 NamedDecl *FirstQualifierFoundInScope, 1862 DeclarationName Member, 1863 SourceLocation MemberLoc, 1864 const TemplateArgumentListInfo *TemplateArgs); 1865 1866 /// \brief True if this is an implicit access, i.e. one in which the 1867 /// member being accessed was not written in the source. The source 1868 /// location of the operator is invalid in this case. 1869 bool isImplicitAccess() const { return Base == 0; } 1870 1871 /// \brief Retrieve the base object of this member expressions, 1872 /// e.g., the \c x in \c x.m. 1873 Expr *getBase() const { 1874 assert(!isImplicitAccess()); 1875 return cast<Expr>(Base); 1876 } 1877 void setBase(Expr *E) { Base = E; } 1878 1879 QualType getBaseType() const { return BaseType; } 1880 1881 /// \brief Determine whether this member expression used the '->' 1882 /// operator; otherwise, it used the '.' operator. 1883 bool isArrow() const { return IsArrow; } 1884 void setArrow(bool A) { IsArrow = A; } 1885 1886 /// \brief Retrieve the location of the '->' or '.' operator. 1887 SourceLocation getOperatorLoc() const { return OperatorLoc; } 1888 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 1889 1890 /// \brief Retrieve the nested-name-specifier that qualifies the member 1891 /// name. 1892 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1893 1894 /// \brief Retrieve the source range covering the nested-name-specifier 1895 /// that qualifies the member name. 1896 SourceRange getQualifierRange() const { return QualifierRange; } 1897 1898 /// \brief Retrieve the first part of the nested-name-specifier that was 1899 /// found in the scope of the member access expression when the member access 1900 /// was initially parsed. 1901 /// 1902 /// This function only returns a useful result when member access expression 1903 /// uses a qualified member name, e.g., "x.Base::f". Here, the declaration 1904 /// returned by this function describes what was found by unqualified name 1905 /// lookup for the identifier "Base" within the scope of the member access 1906 /// expression itself. At template instantiation time, this information is 1907 /// combined with the results of name lookup into the type of the object 1908 /// expression itself (the class type of x). 1909 NamedDecl *getFirstQualifierFoundInScope() const { 1910 return FirstQualifierFoundInScope; 1911 } 1912 1913 /// \brief Retrieve the name of the member that this expression 1914 /// refers to. 1915 DeclarationName getMember() const { return Member; } 1916 void setMember(DeclarationName N) { Member = N; } 1917 1918 // \brief Retrieve the location of the name of the member that this 1919 // expression refers to. 1920 SourceLocation getMemberLoc() const { return MemberLoc; } 1921 void setMemberLoc(SourceLocation L) { MemberLoc = L; } 1922 1923 /// \brief Determines whether this member expression actually had a C++ 1924 /// template argument list explicitly specified, e.g., x.f<int>. 1925 bool hasExplicitTemplateArgs() const { 1926 return HasExplicitTemplateArgs; 1927 } 1928 1929 /// \brief Copies the template arguments (if present) into the given 1930 /// structure. 1931 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1932 assert(HasExplicitTemplateArgs); 1933 getExplicitTemplateArgumentList()->copyInto(List); 1934 } 1935 1936 /// \brief Retrieve the location of the left angle bracket following the 1937 /// member name ('<'), if any. 1938 SourceLocation getLAngleLoc() const { 1939 assert(HasExplicitTemplateArgs); 1940 return getExplicitTemplateArgumentList()->LAngleLoc; 1941 } 1942 1943 /// \brief Retrieve the template arguments provided as part of this 1944 /// template-id. 1945 const TemplateArgumentLoc *getTemplateArgs() const { 1946 assert(HasExplicitTemplateArgs); 1947 return getExplicitTemplateArgumentList()->getTemplateArgs(); 1948 } 1949 1950 /// \brief Retrieve the number of template arguments provided as part of this 1951 /// template-id. 1952 unsigned getNumTemplateArgs() const { 1953 assert(HasExplicitTemplateArgs); 1954 return getExplicitTemplateArgumentList()->NumTemplateArgs; 1955 } 1956 1957 /// \brief Retrieve the location of the right angle bracket following the 1958 /// template arguments ('>'). 1959 SourceLocation getRAngleLoc() const { 1960 assert(HasExplicitTemplateArgs); 1961 return getExplicitTemplateArgumentList()->RAngleLoc; 1962 } 1963 1964 virtual SourceRange getSourceRange() const { 1965 SourceRange Range; 1966 if (!isImplicitAccess()) 1967 Range.setBegin(Base->getSourceRange().getBegin()); 1968 else if (getQualifier()) 1969 Range.setBegin(getQualifierRange().getBegin()); 1970 else 1971 Range.setBegin(MemberLoc); 1972 1973 if (hasExplicitTemplateArgs()) 1974 Range.setEnd(getRAngleLoc()); 1975 else 1976 Range.setEnd(MemberLoc); 1977 return Range; 1978 } 1979 1980 static bool classof(const Stmt *T) { 1981 return T->getStmtClass() == CXXDependentScopeMemberExprClass; 1982 } 1983 static bool classof(const CXXDependentScopeMemberExpr *) { return true; } 1984 1985 // Iterators 1986 virtual child_iterator child_begin(); 1987 virtual child_iterator child_end(); 1988}; 1989 1990/// \brief Represents a C++ member access expression for which lookup 1991/// produced a set of overloaded functions. 1992/// 1993/// The member access may be explicit or implicit: 1994/// struct A { 1995/// int a, b; 1996/// int explicitAccess() { return this->a + this->A::b; } 1997/// int implicitAccess() { return a + A::b; } 1998/// }; 1999/// 2000/// In the final AST, an explicit access always becomes a MemberExpr. 2001/// An implicit access may become either a MemberExpr or a 2002/// DeclRefExpr, depending on whether the member is static. 2003class UnresolvedMemberExpr : public OverloadExpr { 2004 /// \brief Whether this member expression used the '->' operator or 2005 /// the '.' operator. 2006 bool IsArrow : 1; 2007 2008 /// \brief Whether the lookup results contain an unresolved using 2009 /// declaration. 2010 bool HasUnresolvedUsing : 1; 2011 2012 /// \brief The expression for the base pointer or class reference, 2013 /// e.g., the \c x in x.f. This can be null if this is an 'unbased' 2014 /// member expression 2015 Stmt *Base; 2016 2017 /// \brief The type of the base expression; never null. 2018 QualType BaseType; 2019 2020 /// \brief The location of the '->' or '.' operator. 2021 SourceLocation OperatorLoc; 2022 2023 UnresolvedMemberExpr(QualType T, bool Dependent, 2024 bool HasUnresolvedUsing, 2025 Expr *Base, QualType BaseType, bool IsArrow, 2026 SourceLocation OperatorLoc, 2027 NestedNameSpecifier *Qualifier, 2028 SourceRange QualifierRange, 2029 DeclarationName Member, 2030 SourceLocation MemberLoc, 2031 const TemplateArgumentListInfo *TemplateArgs); 2032 2033public: 2034 static UnresolvedMemberExpr * 2035 Create(ASTContext &C, bool Dependent, bool HasUnresolvedUsing, 2036 Expr *Base, QualType BaseType, bool IsArrow, 2037 SourceLocation OperatorLoc, 2038 NestedNameSpecifier *Qualifier, 2039 SourceRange QualifierRange, 2040 DeclarationName Member, 2041 SourceLocation MemberLoc, 2042 const TemplateArgumentListInfo *TemplateArgs); 2043 2044 /// \brief True if this is an implicit access, i.e. one in which the 2045 /// member being accessed was not written in the source. The source 2046 /// location of the operator is invalid in this case. 2047 bool isImplicitAccess() const { return Base == 0; } 2048 2049 /// \brief Retrieve the base object of this member expressions, 2050 /// e.g., the \c x in \c x.m. 2051 Expr *getBase() { 2052 assert(!isImplicitAccess()); 2053 return cast<Expr>(Base); 2054 } 2055 const Expr *getBase() const { 2056 assert(!isImplicitAccess()); 2057 return cast<Expr>(Base); 2058 } 2059 void setBase(Expr *E) { Base = E; } 2060 2061 QualType getBaseType() const { return BaseType; } 2062 2063 /// \brief Determine whether this member expression used the '->' 2064 /// operator; otherwise, it used the '.' operator. 2065 bool isArrow() const { return IsArrow; } 2066 void setArrow(bool A) { IsArrow = A; } 2067 2068 /// \brief Retrieve the location of the '->' or '.' operator. 2069 SourceLocation getOperatorLoc() const { return OperatorLoc; } 2070 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 2071 2072 /// \brief Retrieves the naming class of this lookup. 2073 CXXRecordDecl *getNamingClass() const; 2074 2075 /// \brief Retrieve the name of the member that this expression 2076 /// refers to. 2077 DeclarationName getMemberName() const { return getName(); } 2078 void setMemberName(DeclarationName N) { setName(N); } 2079 2080 // \brief Retrieve the location of the name of the member that this 2081 // expression refers to. 2082 SourceLocation getMemberLoc() const { return getNameLoc(); } 2083 void setMemberLoc(SourceLocation L) { setNameLoc(L); } 2084 2085 /// \brief Retrieve the explicit template argument list that followed the 2086 /// member template name. 2087 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 2088 assert(hasExplicitTemplateArgs()); 2089 return *reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 2090 } 2091 2092 /// \brief Retrieve the explicit template argument list that followed the 2093 /// member template name, if any. 2094 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 2095 assert(hasExplicitTemplateArgs()); 2096 return *reinterpret_cast<const ExplicitTemplateArgumentList *>(this + 1); 2097 } 2098 2099 /// \brief Copies the template arguments into the given structure. 2100 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 2101 getExplicitTemplateArgs().copyInto(List); 2102 } 2103 2104 /// \brief Retrieve the location of the left angle bracket following 2105 /// the member name ('<'). 2106 SourceLocation getLAngleLoc() const { 2107 return getExplicitTemplateArgs().LAngleLoc; 2108 } 2109 2110 /// \brief Retrieve the template arguments provided as part of this 2111 /// template-id. 2112 const TemplateArgumentLoc *getTemplateArgs() const { 2113 return getExplicitTemplateArgs().getTemplateArgs(); 2114 } 2115 2116 /// \brief Retrieve the number of template arguments provided as 2117 /// part of this template-id. 2118 unsigned getNumTemplateArgs() const { 2119 return getExplicitTemplateArgs().NumTemplateArgs; 2120 } 2121 2122 /// \brief Retrieve the location of the right angle bracket 2123 /// following the template arguments ('>'). 2124 SourceLocation getRAngleLoc() const { 2125 return getExplicitTemplateArgs().RAngleLoc; 2126 } 2127 2128 virtual SourceRange getSourceRange() const { 2129 SourceRange Range; 2130 if (!isImplicitAccess()) 2131 Range.setBegin(Base->getSourceRange().getBegin()); 2132 else if (getQualifier()) 2133 Range.setBegin(getQualifierRange().getBegin()); 2134 else 2135 Range.setBegin(getMemberLoc()); 2136 2137 if (hasExplicitTemplateArgs()) 2138 Range.setEnd(getRAngleLoc()); 2139 else 2140 Range.setEnd(getMemberLoc()); 2141 return Range; 2142 } 2143 2144 static bool classof(const Stmt *T) { 2145 return T->getStmtClass() == UnresolvedMemberExprClass; 2146 } 2147 static bool classof(const UnresolvedMemberExpr *) { return true; } 2148 2149 // Iterators 2150 virtual child_iterator child_begin(); 2151 virtual child_iterator child_end(); 2152}; 2153 2154inline ExplicitTemplateArgumentList &OverloadExpr::getExplicitTemplateArgs() { 2155 if (isa<UnresolvedLookupExpr>(this)) 2156 return cast<UnresolvedLookupExpr>(this)->getExplicitTemplateArgs(); 2157 else 2158 return cast<UnresolvedMemberExpr>(this)->getExplicitTemplateArgs(); 2159} 2160 2161} // end namespace clang 2162 2163#endif 2164