ExprCXX.h revision 7bb12da2b0749eeebb21854c77877736969e59f2
1//===--- ExprCXX.h - Classes for representing expressions -------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Expr interface and subclasses for C++ expressions. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_EXPRCXX_H 15#define LLVM_CLANG_AST_EXPRCXX_H 16 17#include "clang/Basic/TypeTraits.h" 18#include "clang/AST/Expr.h" 19#include "clang/AST/UnresolvedSet.h" 20#include "clang/AST/TemplateBase.h" 21 22namespace clang { 23 24 class CXXConstructorDecl; 25 class CXXDestructorDecl; 26 class CXXMethodDecl; 27 class CXXTemporary; 28 class TemplateArgumentListInfo; 29 30//===--------------------------------------------------------------------===// 31// C++ Expressions. 32//===--------------------------------------------------------------------===// 33 34/// \brief A call to an overloaded operator written using operator 35/// syntax. 36/// 37/// Represents a call to an overloaded operator written using operator 38/// syntax, e.g., "x + y" or "*p". While semantically equivalent to a 39/// normal call, this AST node provides better information about the 40/// syntactic representation of the call. 41/// 42/// In a C++ template, this expression node kind will be used whenever 43/// any of the arguments are type-dependent. In this case, the 44/// function itself will be a (possibly empty) set of functions and 45/// function templates that were found by name lookup at template 46/// definition time. 47class CXXOperatorCallExpr : public CallExpr { 48 /// \brief The overloaded operator. 49 OverloadedOperatorKind Operator; 50 51public: 52 CXXOperatorCallExpr(ASTContext& C, OverloadedOperatorKind Op, Expr *fn, 53 Expr **args, unsigned numargs, QualType t, 54 SourceLocation operatorloc) 55 : CallExpr(C, CXXOperatorCallExprClass, fn, args, numargs, t, operatorloc), 56 Operator(Op) {} 57 explicit CXXOperatorCallExpr(ASTContext& C, EmptyShell Empty) : 58 CallExpr(C, CXXOperatorCallExprClass, Empty) { } 59 60 61 /// getOperator - Returns the kind of overloaded operator that this 62 /// expression refers to. 63 OverloadedOperatorKind getOperator() const { return Operator; } 64 void setOperator(OverloadedOperatorKind Kind) { Operator = Kind; } 65 66 /// getOperatorLoc - Returns the location of the operator symbol in 67 /// the expression. When @c getOperator()==OO_Call, this is the 68 /// location of the right parentheses; when @c 69 /// getOperator()==OO_Subscript, this is the location of the right 70 /// bracket. 71 SourceLocation getOperatorLoc() const { return getRParenLoc(); } 72 73 virtual SourceRange getSourceRange() const; 74 75 static bool classof(const Stmt *T) { 76 return T->getStmtClass() == CXXOperatorCallExprClass; 77 } 78 static bool classof(const CXXOperatorCallExpr *) { return true; } 79}; 80 81/// CXXMemberCallExpr - Represents a call to a member function that 82/// may be written either with member call syntax (e.g., "obj.func()" 83/// or "objptr->func()") or with normal function-call syntax 84/// ("func()") within a member function that ends up calling a member 85/// function. The callee in either case is a MemberExpr that contains 86/// both the object argument and the member function, while the 87/// arguments are the arguments within the parentheses (not including 88/// the object argument). 89class CXXMemberCallExpr : public CallExpr { 90public: 91 CXXMemberCallExpr(ASTContext& C, Expr *fn, Expr **args, unsigned numargs, 92 QualType t, SourceLocation rparenloc) 93 : CallExpr(C, CXXMemberCallExprClass, fn, args, numargs, t, rparenloc) {} 94 95 /// getImplicitObjectArgument - Retrieves the implicit object 96 /// argument for the member call. For example, in "x.f(5)", this 97 /// operation would return "x". 98 Expr *getImplicitObjectArgument(); 99 100 virtual SourceRange getSourceRange() const; 101 102 static bool classof(const Stmt *T) { 103 return T->getStmtClass() == CXXMemberCallExprClass; 104 } 105 static bool classof(const CXXMemberCallExpr *) { return true; } 106}; 107 108/// CXXNamedCastExpr - Abstract class common to all of the C++ "named" 109/// casts, @c static_cast, @c dynamic_cast, @c reinterpret_cast, or @c 110/// const_cast. 111/// 112/// This abstract class is inherited by all of the classes 113/// representing "named" casts, e.g., CXXStaticCastExpr, 114/// CXXDynamicCastExpr, CXXReinterpretCastExpr, and CXXConstCastExpr. 115class CXXNamedCastExpr : public ExplicitCastExpr { 116private: 117 SourceLocation Loc; // the location of the casting op 118 119protected: 120 CXXNamedCastExpr(StmtClass SC, QualType ty, CastKind kind, Expr *op, 121 TypeSourceInfo *writtenTy, SourceLocation l) 122 : ExplicitCastExpr(SC, ty, kind, op, writtenTy), Loc(l) {} 123 124 explicit CXXNamedCastExpr(StmtClass SC, EmptyShell Shell) 125 : ExplicitCastExpr(SC, Shell) { } 126 127public: 128 const char *getCastName() const; 129 130 /// \brief Retrieve the location of the cast operator keyword, e.g., 131 /// "static_cast". 132 SourceLocation getOperatorLoc() const { return Loc; } 133 void setOperatorLoc(SourceLocation L) { Loc = L; } 134 135 virtual SourceRange getSourceRange() const { 136 return SourceRange(Loc, getSubExpr()->getSourceRange().getEnd()); 137 } 138 static bool classof(const Stmt *T) { 139 switch (T->getStmtClass()) { 140 case CXXNamedCastExprClass: 141 case CXXStaticCastExprClass: 142 case CXXDynamicCastExprClass: 143 case CXXReinterpretCastExprClass: 144 case CXXConstCastExprClass: 145 return true; 146 default: 147 return false; 148 } 149 } 150 static bool classof(const CXXNamedCastExpr *) { return true; } 151}; 152 153/// CXXStaticCastExpr - A C++ @c static_cast expression (C++ [expr.static.cast]). 154/// 155/// This expression node represents a C++ static cast, e.g., 156/// @c static_cast<int>(1.0). 157class CXXStaticCastExpr : public CXXNamedCastExpr { 158public: 159 CXXStaticCastExpr(QualType ty, CastKind kind, Expr *op, 160 TypeSourceInfo *writtenTy, SourceLocation l) 161 : CXXNamedCastExpr(CXXStaticCastExprClass, ty, kind, op, writtenTy, l) {} 162 163 explicit CXXStaticCastExpr(EmptyShell Empty) 164 : CXXNamedCastExpr(CXXStaticCastExprClass, Empty) { } 165 166 static bool classof(const Stmt *T) { 167 return T->getStmtClass() == CXXStaticCastExprClass; 168 } 169 static bool classof(const CXXStaticCastExpr *) { return true; } 170}; 171 172/// CXXDynamicCastExpr - A C++ @c dynamic_cast expression 173/// (C++ [expr.dynamic.cast]), which may perform a run-time check to 174/// determine how to perform the type cast. 175/// 176/// This expression node represents a dynamic cast, e.g., 177/// @c dynamic_cast<Derived*>(BasePtr). 178class CXXDynamicCastExpr : public CXXNamedCastExpr { 179public: 180 CXXDynamicCastExpr(QualType ty, CastKind kind, Expr *op, 181 TypeSourceInfo *writtenTy, SourceLocation l) 182 : CXXNamedCastExpr(CXXDynamicCastExprClass, ty, kind, op, writtenTy, l) {} 183 184 explicit CXXDynamicCastExpr(EmptyShell Empty) 185 : CXXNamedCastExpr(CXXDynamicCastExprClass, Empty) { } 186 187 static bool classof(const Stmt *T) { 188 return T->getStmtClass() == CXXDynamicCastExprClass; 189 } 190 static bool classof(const CXXDynamicCastExpr *) { return true; } 191}; 192 193/// CXXReinterpretCastExpr - A C++ @c reinterpret_cast expression (C++ 194/// [expr.reinterpret.cast]), which provides a differently-typed view 195/// of a value but performs no actual work at run time. 196/// 197/// This expression node represents a reinterpret cast, e.g., 198/// @c reinterpret_cast<int>(VoidPtr). 199class CXXReinterpretCastExpr : public CXXNamedCastExpr { 200public: 201 CXXReinterpretCastExpr(QualType ty, CastKind kind, Expr *op, 202 TypeSourceInfo *writtenTy, SourceLocation l) 203 : CXXNamedCastExpr(CXXReinterpretCastExprClass, ty, kind, op, 204 writtenTy, l) {} 205 206 explicit CXXReinterpretCastExpr(EmptyShell Empty) 207 : CXXNamedCastExpr(CXXReinterpretCastExprClass, Empty) { } 208 209 static bool classof(const Stmt *T) { 210 return T->getStmtClass() == CXXReinterpretCastExprClass; 211 } 212 static bool classof(const CXXReinterpretCastExpr *) { return true; } 213}; 214 215/// CXXConstCastExpr - A C++ @c const_cast expression (C++ [expr.const.cast]), 216/// which can remove type qualifiers but does not change the underlying value. 217/// 218/// This expression node represents a const cast, e.g., 219/// @c const_cast<char*>(PtrToConstChar). 220class CXXConstCastExpr : public CXXNamedCastExpr { 221public: 222 CXXConstCastExpr(QualType ty, Expr *op, TypeSourceInfo *writtenTy, 223 SourceLocation l) 224 : CXXNamedCastExpr(CXXConstCastExprClass, ty, CK_NoOp, op, writtenTy, l) {} 225 226 explicit CXXConstCastExpr(EmptyShell Empty) 227 : CXXNamedCastExpr(CXXConstCastExprClass, Empty) { } 228 229 static bool classof(const Stmt *T) { 230 return T->getStmtClass() == CXXConstCastExprClass; 231 } 232 static bool classof(const CXXConstCastExpr *) { return true; } 233}; 234 235/// CXXBoolLiteralExpr - [C++ 2.13.5] C++ Boolean Literal. 236/// 237class CXXBoolLiteralExpr : public Expr { 238 bool Value; 239 SourceLocation Loc; 240public: 241 CXXBoolLiteralExpr(bool val, QualType Ty, SourceLocation l) : 242 Expr(CXXBoolLiteralExprClass, Ty, false, false), Value(val), Loc(l) {} 243 244 bool getValue() const { return Value; } 245 246 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 247 248 static bool classof(const Stmt *T) { 249 return T->getStmtClass() == CXXBoolLiteralExprClass; 250 } 251 static bool classof(const CXXBoolLiteralExpr *) { return true; } 252 253 // Iterators 254 virtual child_iterator child_begin(); 255 virtual child_iterator child_end(); 256}; 257 258/// CXXNullPtrLiteralExpr - [C++0x 2.14.7] C++ Pointer Literal 259class CXXNullPtrLiteralExpr : public Expr { 260 SourceLocation Loc; 261public: 262 CXXNullPtrLiteralExpr(QualType Ty, SourceLocation l) : 263 Expr(CXXNullPtrLiteralExprClass, Ty, false, false), Loc(l) {} 264 265 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 266 267 static bool classof(const Stmt *T) { 268 return T->getStmtClass() == CXXNullPtrLiteralExprClass; 269 } 270 static bool classof(const CXXNullPtrLiteralExpr *) { return true; } 271 272 virtual child_iterator child_begin(); 273 virtual child_iterator child_end(); 274}; 275 276/// CXXTypeidExpr - A C++ @c typeid expression (C++ [expr.typeid]), which gets 277/// the type_info that corresponds to the supplied type, or the (possibly 278/// dynamic) type of the supplied expression. 279/// 280/// This represents code like @c typeid(int) or @c typeid(*objPtr) 281class CXXTypeidExpr : public Expr { 282private: 283 bool isTypeOp : 1; 284 union { 285 void *Ty; 286 Stmt *Ex; 287 } Operand; 288 SourceRange Range; 289 290public: 291 CXXTypeidExpr(bool isTypeOp, void *op, QualType Ty, const SourceRange r) : 292 Expr(CXXTypeidExprClass, Ty, 293 // typeid is never type-dependent (C++ [temp.dep.expr]p4) 294 false, 295 // typeid is value-dependent if the type or expression are dependent 296 (isTypeOp ? QualType::getFromOpaquePtr(op)->isDependentType() 297 : static_cast<Expr*>(op)->isValueDependent())), 298 isTypeOp(isTypeOp), Range(r) { 299 if (isTypeOp) 300 Operand.Ty = op; 301 else 302 // op was an Expr*, so cast it back to that to be safe 303 Operand.Ex = static_cast<Expr*>(op); 304 } 305 306 bool isTypeOperand() const { return isTypeOp; } 307 QualType getTypeOperand() const { 308 assert(isTypeOperand() && "Cannot call getTypeOperand for typeid(expr)"); 309 return QualType::getFromOpaquePtr(Operand.Ty); 310 } 311 Expr* getExprOperand() const { 312 assert(!isTypeOperand() && "Cannot call getExprOperand for typeid(type)"); 313 return static_cast<Expr*>(Operand.Ex); 314 } 315 316 virtual SourceRange getSourceRange() const { 317 return Range; 318 } 319 static bool classof(const Stmt *T) { 320 return T->getStmtClass() == CXXTypeidExprClass; 321 } 322 static bool classof(const CXXTypeidExpr *) { return true; } 323 324 // Iterators 325 virtual child_iterator child_begin(); 326 virtual child_iterator child_end(); 327}; 328 329/// CXXThisExpr - Represents the "this" expression in C++, which is a 330/// pointer to the object on which the current member function is 331/// executing (C++ [expr.prim]p3). Example: 332/// 333/// @code 334/// class Foo { 335/// public: 336/// void bar(); 337/// void test() { this->bar(); } 338/// }; 339/// @endcode 340class CXXThisExpr : public Expr { 341 SourceLocation Loc; 342 bool Implicit : 1; 343 344public: 345 CXXThisExpr(SourceLocation L, QualType Type, bool isImplicit) 346 : Expr(CXXThisExprClass, Type, 347 // 'this' is type-dependent if the class type of the enclosing 348 // member function is dependent (C++ [temp.dep.expr]p2) 349 Type->isDependentType(), Type->isDependentType()), 350 Loc(L), Implicit(isImplicit) { } 351 352 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 353 354 bool isImplicit() const { return Implicit; } 355 void setImplicit(bool I) { Implicit = I; } 356 357 static bool classof(const Stmt *T) { 358 return T->getStmtClass() == CXXThisExprClass; 359 } 360 static bool classof(const CXXThisExpr *) { return true; } 361 362 // Iterators 363 virtual child_iterator child_begin(); 364 virtual child_iterator child_end(); 365}; 366 367/// CXXThrowExpr - [C++ 15] C++ Throw Expression. This handles 368/// 'throw' and 'throw' assignment-expression. When 369/// assignment-expression isn't present, Op will be null. 370/// 371class CXXThrowExpr : public Expr { 372 Stmt *Op; 373 SourceLocation ThrowLoc; 374public: 375 // Ty is the void type which is used as the result type of the 376 // exepression. The l is the location of the throw keyword. expr 377 // can by null, if the optional expression to throw isn't present. 378 CXXThrowExpr(Expr *expr, QualType Ty, SourceLocation l) : 379 Expr(CXXThrowExprClass, Ty, false, false), Op(expr), ThrowLoc(l) {} 380 const Expr *getSubExpr() const { return cast_or_null<Expr>(Op); } 381 Expr *getSubExpr() { return cast_or_null<Expr>(Op); } 382 void setSubExpr(Expr *E) { Op = E; } 383 384 SourceLocation getThrowLoc() const { return ThrowLoc; } 385 void setThrowLoc(SourceLocation L) { ThrowLoc = L; } 386 387 virtual SourceRange getSourceRange() const { 388 if (getSubExpr() == 0) 389 return SourceRange(ThrowLoc, ThrowLoc); 390 return SourceRange(ThrowLoc, getSubExpr()->getSourceRange().getEnd()); 391 } 392 393 static bool classof(const Stmt *T) { 394 return T->getStmtClass() == CXXThrowExprClass; 395 } 396 static bool classof(const CXXThrowExpr *) { return true; } 397 398 // Iterators 399 virtual child_iterator child_begin(); 400 virtual child_iterator child_end(); 401}; 402 403/// CXXDefaultArgExpr - C++ [dcl.fct.default]. This wraps up a 404/// function call argument that was created from the corresponding 405/// parameter's default argument, when the call did not explicitly 406/// supply arguments for all of the parameters. 407class CXXDefaultArgExpr : public Expr { 408 /// \brief The parameter whose default is being used. 409 /// 410 /// When the bit is set, the subexpression is stored after the 411 /// CXXDefaultArgExpr itself. When the bit is clear, the parameter's 412 /// actual default expression is the subexpression. 413 llvm::PointerIntPair<ParmVarDecl *, 1, bool> Param; 414 415 /// \brief The location where the default argument expression was used. 416 SourceLocation Loc; 417 418protected: 419 CXXDefaultArgExpr(StmtClass SC, SourceLocation Loc, ParmVarDecl *param) 420 : Expr(SC, 421 param->hasUnparsedDefaultArg() 422 ? param->getType().getNonReferenceType() 423 : param->getDefaultArg()->getType(), 424 false, false), 425 Param(param, false), Loc(Loc) { } 426 427 CXXDefaultArgExpr(StmtClass SC, SourceLocation Loc, ParmVarDecl *param, 428 Expr *SubExpr) 429 : Expr(SC, SubExpr->getType(), false, false), Param(param, true), Loc(Loc) 430 { 431 *reinterpret_cast<Expr **>(this + 1) = SubExpr; 432 } 433 434protected: 435 virtual void DoDestroy(ASTContext &C); 436 437public: 438 // Param is the parameter whose default argument is used by this 439 // expression. 440 static CXXDefaultArgExpr *Create(ASTContext &C, SourceLocation Loc, 441 ParmVarDecl *Param) { 442 return new (C) CXXDefaultArgExpr(CXXDefaultArgExprClass, Loc, Param); 443 } 444 445 // Param is the parameter whose default argument is used by this 446 // expression, and SubExpr is the expression that will actually be used. 447 static CXXDefaultArgExpr *Create(ASTContext &C, 448 SourceLocation Loc, 449 ParmVarDecl *Param, 450 Expr *SubExpr); 451 452 // Retrieve the parameter that the argument was created from. 453 const ParmVarDecl *getParam() const { return Param.getPointer(); } 454 ParmVarDecl *getParam() { return Param.getPointer(); } 455 456 // Retrieve the actual argument to the function call. 457 const Expr *getExpr() const { 458 if (Param.getInt()) 459 return *reinterpret_cast<Expr const * const*> (this + 1); 460 return getParam()->getDefaultArg(); 461 } 462 Expr *getExpr() { 463 if (Param.getInt()) 464 return *reinterpret_cast<Expr **> (this + 1); 465 return getParam()->getDefaultArg(); 466 } 467 468 /// \brief Retrieve the location where this default argument was actually 469 /// used. 470 SourceLocation getUsedLocation() const { return Loc; } 471 472 virtual SourceRange getSourceRange() const { 473 // Default argument expressions have no representation in the 474 // source, so they have an empty source range. 475 return SourceRange(); 476 } 477 478 static bool classof(const Stmt *T) { 479 return T->getStmtClass() == CXXDefaultArgExprClass; 480 } 481 static bool classof(const CXXDefaultArgExpr *) { return true; } 482 483 // Iterators 484 virtual child_iterator child_begin(); 485 virtual child_iterator child_end(); 486}; 487 488/// CXXTemporary - Represents a C++ temporary. 489class CXXTemporary { 490 /// Destructor - The destructor that needs to be called. 491 const CXXDestructorDecl *Destructor; 492 493 CXXTemporary(const CXXDestructorDecl *destructor) 494 : Destructor(destructor) { } 495 ~CXXTemporary() { } 496 497public: 498 static CXXTemporary *Create(ASTContext &C, 499 const CXXDestructorDecl *Destructor); 500 501 void Destroy(ASTContext &Ctx); 502 503 const CXXDestructorDecl *getDestructor() const { return Destructor; } 504}; 505 506/// CXXBindTemporaryExpr - Represents binding an expression to a temporary, 507/// so its destructor can be called later. 508class CXXBindTemporaryExpr : public Expr { 509 CXXTemporary *Temp; 510 511 Stmt *SubExpr; 512 513 CXXBindTemporaryExpr(CXXTemporary *temp, Expr* subexpr) 514 : Expr(CXXBindTemporaryExprClass, subexpr->getType(), false, false), 515 Temp(temp), SubExpr(subexpr) { } 516 ~CXXBindTemporaryExpr() { } 517 518protected: 519 virtual void DoDestroy(ASTContext &C); 520 521public: 522 static CXXBindTemporaryExpr *Create(ASTContext &C, CXXTemporary *Temp, 523 Expr* SubExpr); 524 525 CXXTemporary *getTemporary() { return Temp; } 526 const CXXTemporary *getTemporary() const { return Temp; } 527 528 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 529 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 530 void setSubExpr(Expr *E) { SubExpr = E; } 531 532 virtual SourceRange getSourceRange() const { 533 return SubExpr->getSourceRange(); 534 } 535 536 // Implement isa/cast/dyncast/etc. 537 static bool classof(const Stmt *T) { 538 return T->getStmtClass() == CXXBindTemporaryExprClass; 539 } 540 static bool classof(const CXXBindTemporaryExpr *) { return true; } 541 542 // Iterators 543 virtual child_iterator child_begin(); 544 virtual child_iterator child_end(); 545}; 546 547/// CXXBindReferenceExpr - Represents binding an expression to a reference. 548/// In the example: 549/// 550/// const int &i = 10; 551/// 552/// a bind reference expression is inserted to indicate that 10 is bound to 553/// a reference. (Ans also that a temporary needs to be created to hold the 554/// value). 555class CXXBindReferenceExpr : public Expr { 556 // SubExpr - The expression being bound. 557 Stmt *SubExpr; 558 559 // ExtendsLifetime - Whether binding this reference extends the lifetime of 560 // the expression being bound. FIXME: Add C++ reference. 561 bool ExtendsLifetime; 562 563 /// RequiresTemporaryCopy - Whether binding the subexpression requires a 564 /// temporary copy. 565 bool RequiresTemporaryCopy; 566 567 CXXBindReferenceExpr(Expr *subexpr, bool ExtendsLifetime, 568 bool RequiresTemporaryCopy) 569 : Expr(CXXBindReferenceExprClass, subexpr->getType(), false, false), 570 SubExpr(subexpr), ExtendsLifetime(ExtendsLifetime), 571 RequiresTemporaryCopy(RequiresTemporaryCopy) { } 572 ~CXXBindReferenceExpr() { } 573 574protected: 575 virtual void DoDestroy(ASTContext &C); 576 577public: 578 static CXXBindReferenceExpr *Create(ASTContext &C, Expr *SubExpr, 579 bool ExtendsLifetime, 580 bool RequiresTemporaryCopy); 581 582 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 583 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 584 void setSubExpr(Expr *E) { SubExpr = E; } 585 586 virtual SourceRange getSourceRange() const { 587 return SubExpr->getSourceRange(); 588 } 589 590 /// requiresTemporaryCopy - Whether binding the subexpression requires a 591 /// temporary copy. 592 bool requiresTemporaryCopy() const { return RequiresTemporaryCopy; } 593 594 // extendsLifetime - Whether binding this reference extends the lifetime of 595 // the expression being bound. FIXME: Add C++ reference. 596 bool extendsLifetime() { return ExtendsLifetime; } 597 598 // Implement isa/cast/dyncast/etc. 599 static bool classof(const Stmt *T) { 600 return T->getStmtClass() == CXXBindReferenceExprClass; 601 } 602 static bool classof(const CXXBindReferenceExpr *) { return true; } 603 604 // Iterators 605 virtual child_iterator child_begin(); 606 virtual child_iterator child_end(); 607}; 608 609/// CXXConstructExpr - Represents a call to a C++ constructor. 610class CXXConstructExpr : public Expr { 611 CXXConstructorDecl *Constructor; 612 613 SourceLocation Loc; 614 bool Elidable : 1; 615 bool ZeroInitialization : 1; 616 bool BaseInitialization : 1; 617 Stmt **Args; 618 unsigned NumArgs; 619 620protected: 621 CXXConstructExpr(ASTContext &C, StmtClass SC, QualType T, 622 SourceLocation Loc, 623 CXXConstructorDecl *d, bool elidable, 624 Expr **args, unsigned numargs, 625 bool ZeroInitialization = false, 626 bool BaseInitialization = false); 627 ~CXXConstructExpr() { } 628 629 virtual void DoDestroy(ASTContext &C); 630 631public: 632 /// \brief Construct an empty C++ construction expression that will store 633 /// \p numargs arguments. 634 CXXConstructExpr(EmptyShell Empty, ASTContext &C, unsigned numargs); 635 636 static CXXConstructExpr *Create(ASTContext &C, QualType T, 637 SourceLocation Loc, 638 CXXConstructorDecl *D, bool Elidable, 639 Expr **Args, unsigned NumArgs, 640 bool ZeroInitialization = false, 641 bool BaseInitialization = false); 642 643 644 CXXConstructorDecl* getConstructor() const { return Constructor; } 645 void setConstructor(CXXConstructorDecl *C) { Constructor = C; } 646 647 SourceLocation getLocation() const { return Loc; } 648 void setLocation(SourceLocation Loc) { this->Loc = Loc; } 649 650 /// \brief Whether this construction is elidable. 651 bool isElidable() const { return Elidable; } 652 void setElidable(bool E) { Elidable = E; } 653 654 /// \brief Whether this construction first requires 655 /// zero-initialization before the initializer is called. 656 bool requiresZeroInitialization() const { return ZeroInitialization; } 657 void setRequiresZeroInitialization(bool ZeroInit) { 658 ZeroInitialization = ZeroInit; 659 } 660 661 /// \brief Determines whether this constructor is actually constructing 662 /// a base class (rather than a complete object). 663 bool isBaseInitialization() const { return BaseInitialization; } 664 void setBaseInitialization(bool BI) { BaseInitialization = BI; } 665 666 typedef ExprIterator arg_iterator; 667 typedef ConstExprIterator const_arg_iterator; 668 669 arg_iterator arg_begin() { return Args; } 670 arg_iterator arg_end() { return Args + NumArgs; } 671 const_arg_iterator arg_begin() const { return Args; } 672 const_arg_iterator arg_end() const { return Args + NumArgs; } 673 674 Expr **getArgs() const { return reinterpret_cast<Expr **>(Args); } 675 unsigned getNumArgs() const { return NumArgs; } 676 677 /// getArg - Return the specified argument. 678 Expr *getArg(unsigned Arg) { 679 assert(Arg < NumArgs && "Arg access out of range!"); 680 return cast<Expr>(Args[Arg]); 681 } 682 const Expr *getArg(unsigned Arg) const { 683 assert(Arg < NumArgs && "Arg access out of range!"); 684 return cast<Expr>(Args[Arg]); 685 } 686 687 /// setArg - Set the specified argument. 688 void setArg(unsigned Arg, Expr *ArgExpr) { 689 assert(Arg < NumArgs && "Arg access out of range!"); 690 Args[Arg] = ArgExpr; 691 } 692 693 virtual SourceRange getSourceRange() const; 694 695 static bool classof(const Stmt *T) { 696 return T->getStmtClass() == CXXConstructExprClass || 697 T->getStmtClass() == CXXTemporaryObjectExprClass; 698 } 699 static bool classof(const CXXConstructExpr *) { return true; } 700 701 // Iterators 702 virtual child_iterator child_begin(); 703 virtual child_iterator child_end(); 704}; 705 706/// CXXFunctionalCastExpr - Represents an explicit C++ type conversion 707/// that uses "functional" notion (C++ [expr.type.conv]). Example: @c 708/// x = int(0.5); 709class CXXFunctionalCastExpr : public ExplicitCastExpr { 710 SourceLocation TyBeginLoc; 711 SourceLocation RParenLoc; 712public: 713 CXXFunctionalCastExpr(QualType ty, TypeSourceInfo *writtenTy, 714 SourceLocation tyBeginLoc, CastKind kind, 715 Expr *castExpr, SourceLocation rParenLoc) 716 : ExplicitCastExpr(CXXFunctionalCastExprClass, ty, kind, castExpr, 717 writtenTy), 718 TyBeginLoc(tyBeginLoc), RParenLoc(rParenLoc) {} 719 720 explicit CXXFunctionalCastExpr(EmptyShell Shell) 721 : ExplicitCastExpr(CXXFunctionalCastExprClass, Shell) { } 722 723 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 724 void setTypeBeginLoc(SourceLocation L) { TyBeginLoc = L; } 725 SourceLocation getRParenLoc() const { return RParenLoc; } 726 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 727 728 virtual SourceRange getSourceRange() const { 729 return SourceRange(TyBeginLoc, RParenLoc); 730 } 731 static bool classof(const Stmt *T) { 732 return T->getStmtClass() == CXXFunctionalCastExprClass; 733 } 734 static bool classof(const CXXFunctionalCastExpr *) { return true; } 735}; 736 737/// @brief Represents a C++ functional cast expression that builds a 738/// temporary object. 739/// 740/// This expression type represents a C++ "functional" cast 741/// (C++[expr.type.conv]) with N != 1 arguments that invokes a 742/// constructor to build a temporary object. If N == 0 but no 743/// constructor will be called (because the functional cast is 744/// performing a value-initialized an object whose class type has no 745/// user-declared constructors), CXXZeroInitValueExpr will represent 746/// the functional cast. Finally, with N == 1 arguments the functional 747/// cast expression will be represented by CXXFunctionalCastExpr. 748/// Example: 749/// @code 750/// struct X { X(int, float); } 751/// 752/// X create_X() { 753/// return X(1, 3.14f); // creates a CXXTemporaryObjectExpr 754/// }; 755/// @endcode 756class CXXTemporaryObjectExpr : public CXXConstructExpr { 757 SourceLocation TyBeginLoc; 758 SourceLocation RParenLoc; 759 760public: 761 CXXTemporaryObjectExpr(ASTContext &C, CXXConstructorDecl *Cons, 762 QualType writtenTy, SourceLocation tyBeginLoc, 763 Expr **Args,unsigned NumArgs, 764 SourceLocation rParenLoc); 765 766 ~CXXTemporaryObjectExpr() { } 767 768 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 769 SourceLocation getRParenLoc() const { return RParenLoc; } 770 771 virtual SourceRange getSourceRange() const { 772 return SourceRange(TyBeginLoc, RParenLoc); 773 } 774 static bool classof(const Stmt *T) { 775 return T->getStmtClass() == CXXTemporaryObjectExprClass; 776 } 777 static bool classof(const CXXTemporaryObjectExpr *) { return true; } 778}; 779 780/// CXXZeroInitValueExpr - [C++ 5.2.3p2] 781/// Expression "T()" which creates a value-initialized rvalue of type 782/// T, which is either a non-class type or a class type without any 783/// user-defined constructors. 784/// 785class CXXZeroInitValueExpr : public Expr { 786 SourceLocation TyBeginLoc; 787 SourceLocation RParenLoc; 788 789public: 790 CXXZeroInitValueExpr(QualType ty, SourceLocation tyBeginLoc, 791 SourceLocation rParenLoc ) : 792 Expr(CXXZeroInitValueExprClass, ty, false, false), 793 TyBeginLoc(tyBeginLoc), RParenLoc(rParenLoc) {} 794 795 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 796 SourceLocation getRParenLoc() const { return RParenLoc; } 797 798 /// @brief Whether this initialization expression was 799 /// implicitly-generated. 800 bool isImplicit() const { 801 return TyBeginLoc.isInvalid() && RParenLoc.isInvalid(); 802 } 803 804 virtual SourceRange getSourceRange() const { 805 return SourceRange(TyBeginLoc, RParenLoc); 806 } 807 808 static bool classof(const Stmt *T) { 809 return T->getStmtClass() == CXXZeroInitValueExprClass; 810 } 811 static bool classof(const CXXZeroInitValueExpr *) { return true; } 812 813 // Iterators 814 virtual child_iterator child_begin(); 815 virtual child_iterator child_end(); 816}; 817 818/// CXXNewExpr - A new expression for memory allocation and constructor calls, 819/// e.g: "new CXXNewExpr(foo)". 820class CXXNewExpr : public Expr { 821 // Was the usage ::new, i.e. is the global new to be used? 822 bool GlobalNew : 1; 823 // Was the form (type-id) used? Otherwise, it was new-type-id. 824 bool ParenTypeId : 1; 825 // Is there an initializer? If not, built-ins are uninitialized, else they're 826 // value-initialized. 827 bool Initializer : 1; 828 // Do we allocate an array? If so, the first SubExpr is the size expression. 829 bool Array : 1; 830 // The number of placement new arguments. 831 unsigned NumPlacementArgs : 14; 832 // The number of constructor arguments. This may be 1 even for non-class 833 // types; use the pseudo copy constructor. 834 unsigned NumConstructorArgs : 14; 835 // Contains an optional array size expression, any number of optional 836 // placement arguments, and any number of optional constructor arguments, 837 // in that order. 838 Stmt **SubExprs; 839 // Points to the allocation function used. 840 FunctionDecl *OperatorNew; 841 // Points to the deallocation function used in case of error. May be null. 842 FunctionDecl *OperatorDelete; 843 // Points to the constructor used. Cannot be null if AllocType is a record; 844 // it would still point at the default constructor (even an implicit one). 845 // Must be null for all other types. 846 CXXConstructorDecl *Constructor; 847 848 SourceLocation StartLoc; 849 SourceLocation EndLoc; 850 851public: 852 CXXNewExpr(bool globalNew, FunctionDecl *operatorNew, Expr **placementArgs, 853 unsigned numPlaceArgs, bool ParenTypeId, Expr *arraySize, 854 CXXConstructorDecl *constructor, bool initializer, 855 Expr **constructorArgs, unsigned numConsArgs, 856 FunctionDecl *operatorDelete, QualType ty, 857 SourceLocation startLoc, SourceLocation endLoc); 858 ~CXXNewExpr() { 859 delete[] SubExprs; 860 } 861 862 QualType getAllocatedType() const { 863 assert(getType()->isPointerType()); 864 return getType()->getAs<PointerType>()->getPointeeType(); 865 } 866 867 FunctionDecl *getOperatorNew() const { return OperatorNew; } 868 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 869 CXXConstructorDecl *getConstructor() const { return Constructor; } 870 871 bool isArray() const { return Array; } 872 Expr *getArraySize() { 873 return Array ? cast<Expr>(SubExprs[0]) : 0; 874 } 875 const Expr *getArraySize() const { 876 return Array ? cast<Expr>(SubExprs[0]) : 0; 877 } 878 879 unsigned getNumPlacementArgs() const { return NumPlacementArgs; } 880 Expr *getPlacementArg(unsigned i) { 881 assert(i < NumPlacementArgs && "Index out of range"); 882 return cast<Expr>(SubExprs[Array + i]); 883 } 884 const Expr *getPlacementArg(unsigned i) const { 885 assert(i < NumPlacementArgs && "Index out of range"); 886 return cast<Expr>(SubExprs[Array + i]); 887 } 888 889 bool isGlobalNew() const { return GlobalNew; } 890 bool isParenTypeId() const { return ParenTypeId; } 891 bool hasInitializer() const { return Initializer; } 892 893 unsigned getNumConstructorArgs() const { return NumConstructorArgs; } 894 Expr *getConstructorArg(unsigned i) { 895 assert(i < NumConstructorArgs && "Index out of range"); 896 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 897 } 898 const Expr *getConstructorArg(unsigned i) const { 899 assert(i < NumConstructorArgs && "Index out of range"); 900 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 901 } 902 903 typedef ExprIterator arg_iterator; 904 typedef ConstExprIterator const_arg_iterator; 905 906 arg_iterator placement_arg_begin() { 907 return SubExprs + Array; 908 } 909 arg_iterator placement_arg_end() { 910 return SubExprs + Array + getNumPlacementArgs(); 911 } 912 const_arg_iterator placement_arg_begin() const { 913 return SubExprs + Array; 914 } 915 const_arg_iterator placement_arg_end() const { 916 return SubExprs + Array + getNumPlacementArgs(); 917 } 918 919 arg_iterator constructor_arg_begin() { 920 return SubExprs + Array + getNumPlacementArgs(); 921 } 922 arg_iterator constructor_arg_end() { 923 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 924 } 925 const_arg_iterator constructor_arg_begin() const { 926 return SubExprs + Array + getNumPlacementArgs(); 927 } 928 const_arg_iterator constructor_arg_end() const { 929 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 930 } 931 932 virtual SourceRange getSourceRange() const { 933 return SourceRange(StartLoc, EndLoc); 934 } 935 936 static bool classof(const Stmt *T) { 937 return T->getStmtClass() == CXXNewExprClass; 938 } 939 static bool classof(const CXXNewExpr *) { return true; } 940 941 // Iterators 942 virtual child_iterator child_begin(); 943 virtual child_iterator child_end(); 944}; 945 946/// CXXDeleteExpr - A delete expression for memory deallocation and destructor 947/// calls, e.g. "delete[] pArray". 948class CXXDeleteExpr : public Expr { 949 // Is this a forced global delete, i.e. "::delete"? 950 bool GlobalDelete : 1; 951 // Is this the array form of delete, i.e. "delete[]"? 952 bool ArrayForm : 1; 953 // Points to the operator delete overload that is used. Could be a member. 954 FunctionDecl *OperatorDelete; 955 // The pointer expression to be deleted. 956 Stmt *Argument; 957 // Location of the expression. 958 SourceLocation Loc; 959public: 960 CXXDeleteExpr(QualType ty, bool globalDelete, bool arrayForm, 961 FunctionDecl *operatorDelete, Expr *arg, SourceLocation loc) 962 : Expr(CXXDeleteExprClass, ty, false, false), GlobalDelete(globalDelete), 963 ArrayForm(arrayForm), OperatorDelete(operatorDelete), Argument(arg), 964 Loc(loc) { } 965 966 bool isGlobalDelete() const { return GlobalDelete; } 967 bool isArrayForm() const { return ArrayForm; } 968 969 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 970 971 Expr *getArgument() { return cast<Expr>(Argument); } 972 const Expr *getArgument() const { return cast<Expr>(Argument); } 973 974 virtual SourceRange getSourceRange() const { 975 return SourceRange(Loc, Argument->getLocEnd()); 976 } 977 978 static bool classof(const Stmt *T) { 979 return T->getStmtClass() == CXXDeleteExprClass; 980 } 981 static bool classof(const CXXDeleteExpr *) { return true; } 982 983 // Iterators 984 virtual child_iterator child_begin(); 985 virtual child_iterator child_end(); 986}; 987 988/// \brief Represents a C++ pseudo-destructor (C++ [expr.pseudo]). 989/// 990/// Example: 991/// 992/// \code 993/// template<typename T> 994/// void destroy(T* ptr) { 995/// ptr->~T(); 996/// } 997/// \endcode 998/// 999/// When the template is parsed, the expression \c ptr->~T will be stored as 1000/// a member reference expression. If it then instantiated with a scalar type 1001/// as a template argument for T, the resulting expression will be a 1002/// pseudo-destructor expression. 1003class CXXPseudoDestructorExpr : public Expr { 1004 /// \brief The base expression (that is being destroyed). 1005 Stmt *Base; 1006 1007 /// \brief Whether the operator was an arrow ('->'); otherwise, it was a 1008 /// period ('.'). 1009 bool IsArrow : 1; 1010 1011 /// \brief The location of the '.' or '->' operator. 1012 SourceLocation OperatorLoc; 1013 1014 /// \brief The nested-name-specifier that follows the operator, if present. 1015 NestedNameSpecifier *Qualifier; 1016 1017 /// \brief The source range that covers the nested-name-specifier, if 1018 /// present. 1019 SourceRange QualifierRange; 1020 1021 /// \brief The type being destroyed. 1022 QualType DestroyedType; 1023 1024 /// \brief The location of the type after the '~'. 1025 SourceLocation DestroyedTypeLoc; 1026 1027public: 1028 CXXPseudoDestructorExpr(ASTContext &Context, 1029 Expr *Base, bool isArrow, SourceLocation OperatorLoc, 1030 NestedNameSpecifier *Qualifier, 1031 SourceRange QualifierRange, 1032 QualType DestroyedType, 1033 SourceLocation DestroyedTypeLoc) 1034 : Expr(CXXPseudoDestructorExprClass, 1035 Context.getPointerType(Context.getFunctionType(Context.VoidTy, 0, 0, 1036 false, 0)), 1037 /*isTypeDependent=*/false, 1038 /*isValueDependent=*/Base->isValueDependent()), 1039 Base(static_cast<Stmt *>(Base)), IsArrow(isArrow), 1040 OperatorLoc(OperatorLoc), Qualifier(Qualifier), 1041 QualifierRange(QualifierRange), DestroyedType(DestroyedType), 1042 DestroyedTypeLoc(DestroyedTypeLoc) { } 1043 1044 void setBase(Expr *E) { Base = E; } 1045 Expr *getBase() const { return cast<Expr>(Base); } 1046 1047 /// \brief Determines whether this member expression actually had 1048 /// a C++ nested-name-specifier prior to the name of the member, e.g., 1049 /// x->Base::foo. 1050 bool hasQualifier() const { return Qualifier != 0; } 1051 1052 /// \brief If the member name was qualified, retrieves the source range of 1053 /// the nested-name-specifier that precedes the member name. Otherwise, 1054 /// returns an empty source range. 1055 SourceRange getQualifierRange() const { return QualifierRange; } 1056 1057 /// \brief If the member name was qualified, retrieves the 1058 /// nested-name-specifier that precedes the member name. Otherwise, returns 1059 /// NULL. 1060 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1061 1062 /// \brief Determine whether this pseudo-destructor expression was written 1063 /// using an '->' (otherwise, it used a '.'). 1064 bool isArrow() const { return IsArrow; } 1065 void setArrow(bool A) { IsArrow = A; } 1066 1067 /// \brief Retrieve the location of the '.' or '->' operator. 1068 SourceLocation getOperatorLoc() const { return OperatorLoc; } 1069 1070 /// \brief Retrieve the type that is being destroyed. 1071 QualType getDestroyedType() const { return DestroyedType; } 1072 1073 /// \brief Retrieve the location of the type being destroyed. 1074 SourceLocation getDestroyedTypeLoc() const { return DestroyedTypeLoc; } 1075 1076 virtual SourceRange getSourceRange() const { 1077 return SourceRange(Base->getLocStart(), DestroyedTypeLoc); 1078 } 1079 1080 static bool classof(const Stmt *T) { 1081 return T->getStmtClass() == CXXPseudoDestructorExprClass; 1082 } 1083 static bool classof(const CXXPseudoDestructorExpr *) { return true; } 1084 1085 // Iterators 1086 virtual child_iterator child_begin(); 1087 virtual child_iterator child_end(); 1088}; 1089 1090/// UnaryTypeTraitExpr - A GCC or MS unary type trait, as used in the 1091/// implementation of TR1/C++0x type trait templates. 1092/// Example: 1093/// __is_pod(int) == true 1094/// __is_enum(std::string) == false 1095class UnaryTypeTraitExpr : public Expr { 1096 /// UTT - The trait. 1097 UnaryTypeTrait UTT; 1098 1099 /// Loc - The location of the type trait keyword. 1100 SourceLocation Loc; 1101 1102 /// RParen - The location of the closing paren. 1103 SourceLocation RParen; 1104 1105 /// QueriedType - The type we're testing. 1106 QualType QueriedType; 1107 1108public: 1109 UnaryTypeTraitExpr(SourceLocation loc, UnaryTypeTrait utt, QualType queried, 1110 SourceLocation rparen, QualType ty) 1111 : Expr(UnaryTypeTraitExprClass, ty, false, queried->isDependentType()), 1112 UTT(utt), Loc(loc), RParen(rparen), QueriedType(queried) { } 1113 1114 virtual SourceRange getSourceRange() const { return SourceRange(Loc, RParen);} 1115 1116 UnaryTypeTrait getTrait() const { return UTT; } 1117 1118 QualType getQueriedType() const { return QueriedType; } 1119 1120 bool EvaluateTrait(ASTContext&) const; 1121 1122 static bool classof(const Stmt *T) { 1123 return T->getStmtClass() == UnaryTypeTraitExprClass; 1124 } 1125 static bool classof(const UnaryTypeTraitExpr *) { return true; } 1126 1127 // Iterators 1128 virtual child_iterator child_begin(); 1129 virtual child_iterator child_end(); 1130}; 1131 1132/// \brief A reference to an overloaded function set, either an 1133/// \t UnresolvedLookupExpr or an \t UnresolvedMemberExpr. 1134class OverloadExpr : public Expr { 1135 /// The results. These are undesugared, which is to say, they may 1136 /// include UsingShadowDecls. Access is relative to the naming 1137 /// class. 1138 UnresolvedSet<4> Results; 1139 1140 /// The common name of these declarations. 1141 DeclarationName Name; 1142 1143 /// The scope specifier, if any. 1144 NestedNameSpecifier *Qualifier; 1145 1146 /// The source range of the scope specifier. 1147 SourceRange QualifierRange; 1148 1149 /// The location of the name. 1150 SourceLocation NameLoc; 1151 1152 /// True if the name was a template-id. 1153 bool HasExplicitTemplateArgs; 1154 1155protected: 1156 OverloadExpr(StmtClass K, QualType T, bool Dependent, 1157 NestedNameSpecifier *Qualifier, SourceRange QRange, 1158 DeclarationName Name, SourceLocation NameLoc, 1159 bool HasTemplateArgs) 1160 : Expr(K, T, Dependent, Dependent), 1161 Name(Name), Qualifier(Qualifier), QualifierRange(QRange), 1162 NameLoc(NameLoc), HasExplicitTemplateArgs(HasTemplateArgs) 1163 {} 1164 1165public: 1166 /// Computes whether an unresolved lookup on the given declarations 1167 /// and optional template arguments is type- and value-dependent. 1168 static bool ComputeDependence(UnresolvedSetIterator Begin, 1169 UnresolvedSetIterator End, 1170 const TemplateArgumentListInfo *Args); 1171 1172 /// Finds the overloaded expression in the given expression of 1173 /// OverloadTy. 1174 /// 1175 /// \return the expression (which must be there) and true if it is 1176 /// within an address-of operator. 1177 static llvm::PointerIntPair<OverloadExpr*,1> find(Expr *E) { 1178 assert(E->getType()->isSpecificBuiltinType(BuiltinType::Overload)); 1179 1180 bool op = false; 1181 E = E->IgnoreParens(); 1182 if (isa<UnaryOperator>(E)) 1183 op = true, E = cast<UnaryOperator>(E)->getSubExpr()->IgnoreParens(); 1184 return llvm::PointerIntPair<OverloadExpr*,1>(cast<OverloadExpr>(E), op); 1185 } 1186 1187 void addDecls(UnresolvedSetIterator Begin, UnresolvedSetIterator End) { 1188 Results.append(Begin, End); 1189 } 1190 1191 typedef UnresolvedSetImpl::iterator decls_iterator; 1192 decls_iterator decls_begin() const { return Results.begin(); } 1193 decls_iterator decls_end() const { return Results.end(); } 1194 1195 /// Gets the decls as an unresolved set. 1196 const UnresolvedSetImpl &getDecls() { return Results; } 1197 1198 /// Gets the number of declarations in the unresolved set. 1199 unsigned getNumDecls() const { return Results.size(); } 1200 1201 /// Gets the name looked up. 1202 DeclarationName getName() const { return Name; } 1203 void setName(DeclarationName N) { Name = N; } 1204 1205 /// Gets the location of the name. 1206 SourceLocation getNameLoc() const { return NameLoc; } 1207 void setNameLoc(SourceLocation Loc) { NameLoc = Loc; } 1208 1209 /// Fetches the nested-name qualifier, if one was given. 1210 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1211 1212 /// Fetches the range of the nested-name qualifier. 1213 SourceRange getQualifierRange() const { return QualifierRange; } 1214 1215 /// \brief Determines whether this expression had an explicit 1216 /// template argument list, e.g. f<int>. 1217 bool hasExplicitTemplateArgs() const { return HasExplicitTemplateArgs; } 1218 1219 ExplicitTemplateArgumentList &getExplicitTemplateArgs(); // defined far below 1220 1221 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1222 return const_cast<OverloadExpr*>(this)->getExplicitTemplateArgs(); 1223 } 1224 1225 ExplicitTemplateArgumentList *getOptionalExplicitTemplateArgs() { 1226 if (hasExplicitTemplateArgs()) 1227 return &getExplicitTemplateArgs(); 1228 return 0; 1229 } 1230 1231 static bool classof(const Stmt *T) { 1232 return T->getStmtClass() == UnresolvedLookupExprClass || 1233 T->getStmtClass() == UnresolvedMemberExprClass; 1234 } 1235 static bool classof(const OverloadExpr *) { return true; } 1236}; 1237 1238/// \brief A reference to a name which we were able to look up during 1239/// parsing but could not resolve to a specific declaration. This 1240/// arises in several ways: 1241/// * we might be waiting for argument-dependent lookup 1242/// * the name might resolve to an overloaded function 1243/// and eventually: 1244/// * the lookup might have included a function template 1245/// These never include UnresolvedUsingValueDecls, which are always 1246/// class members and therefore appear only in 1247/// UnresolvedMemberLookupExprs. 1248class UnresolvedLookupExpr : public OverloadExpr { 1249 /// True if these lookup results should be extended by 1250 /// argument-dependent lookup if this is the operand of a function 1251 /// call. 1252 bool RequiresADL; 1253 1254 /// True if these lookup results are overloaded. This is pretty 1255 /// trivially rederivable if we urgently need to kill this field. 1256 bool Overloaded; 1257 1258 /// The naming class (C++ [class.access.base]p5) of the lookup, if 1259 /// any. This can generally be recalculated from the context chain, 1260 /// but that can be fairly expensive for unqualified lookups. If we 1261 /// want to improve memory use here, this could go in a union 1262 /// against the qualified-lookup bits. 1263 CXXRecordDecl *NamingClass; 1264 1265 UnresolvedLookupExpr(QualType T, bool Dependent, CXXRecordDecl *NamingClass, 1266 NestedNameSpecifier *Qualifier, SourceRange QRange, 1267 DeclarationName Name, SourceLocation NameLoc, 1268 bool RequiresADL, bool Overloaded, bool HasTemplateArgs) 1269 : OverloadExpr(UnresolvedLookupExprClass, T, Dependent, Qualifier, QRange, 1270 Name, NameLoc, HasTemplateArgs), 1271 RequiresADL(RequiresADL), Overloaded(Overloaded), NamingClass(NamingClass) 1272 {} 1273 1274public: 1275 static UnresolvedLookupExpr *Create(ASTContext &C, 1276 bool Dependent, 1277 CXXRecordDecl *NamingClass, 1278 NestedNameSpecifier *Qualifier, 1279 SourceRange QualifierRange, 1280 DeclarationName Name, 1281 SourceLocation NameLoc, 1282 bool ADL, bool Overloaded) { 1283 return new(C) UnresolvedLookupExpr(Dependent ? C.DependentTy : C.OverloadTy, 1284 Dependent, NamingClass, 1285 Qualifier, QualifierRange, 1286 Name, NameLoc, ADL, Overloaded, false); 1287 } 1288 1289 static UnresolvedLookupExpr *Create(ASTContext &C, 1290 bool Dependent, 1291 CXXRecordDecl *NamingClass, 1292 NestedNameSpecifier *Qualifier, 1293 SourceRange QualifierRange, 1294 DeclarationName Name, 1295 SourceLocation NameLoc, 1296 bool ADL, 1297 const TemplateArgumentListInfo &Args); 1298 1299 /// True if this declaration should be extended by 1300 /// argument-dependent lookup. 1301 bool requiresADL() const { return RequiresADL; } 1302 1303 /// True if this lookup is overloaded. 1304 bool isOverloaded() const { return Overloaded; } 1305 1306 /// Gets the 'naming class' (in the sense of C++0x 1307 /// [class.access.base]p5) of the lookup. This is the scope 1308 /// that was looked in to find these results. 1309 CXXRecordDecl *getNamingClass() const { return NamingClass; } 1310 1311 // Note that, inconsistently with the explicit-template-argument AST 1312 // nodes, users are *forbidden* from calling these methods on objects 1313 // without explicit template arguments. 1314 1315 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 1316 assert(hasExplicitTemplateArgs()); 1317 return *reinterpret_cast<ExplicitTemplateArgumentList*>(this + 1); 1318 } 1319 1320 /// Gets a reference to the explicit template argument list. 1321 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1322 assert(hasExplicitTemplateArgs()); 1323 return *reinterpret_cast<const ExplicitTemplateArgumentList*>(this + 1); 1324 } 1325 1326 /// \brief Copies the template arguments (if present) into the given 1327 /// structure. 1328 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1329 getExplicitTemplateArgs().copyInto(List); 1330 } 1331 1332 SourceLocation getLAngleLoc() const { 1333 return getExplicitTemplateArgs().LAngleLoc; 1334 } 1335 1336 SourceLocation getRAngleLoc() const { 1337 return getExplicitTemplateArgs().RAngleLoc; 1338 } 1339 1340 TemplateArgumentLoc const *getTemplateArgs() const { 1341 return getExplicitTemplateArgs().getTemplateArgs(); 1342 } 1343 1344 unsigned getNumTemplateArgs() const { 1345 return getExplicitTemplateArgs().NumTemplateArgs; 1346 } 1347 1348 virtual SourceRange getSourceRange() const { 1349 SourceRange Range(getNameLoc()); 1350 if (getQualifier()) Range.setBegin(getQualifierRange().getBegin()); 1351 if (hasExplicitTemplateArgs()) Range.setEnd(getRAngleLoc()); 1352 return Range; 1353 } 1354 1355 virtual StmtIterator child_begin(); 1356 virtual StmtIterator child_end(); 1357 1358 static bool classof(const Stmt *T) { 1359 return T->getStmtClass() == UnresolvedLookupExprClass; 1360 } 1361 static bool classof(const UnresolvedLookupExpr *) { return true; } 1362}; 1363 1364/// \brief A qualified reference to a name whose declaration cannot 1365/// yet be resolved. 1366/// 1367/// DependentScopeDeclRefExpr is similar to DeclRefExpr in that 1368/// it expresses a reference to a declaration such as 1369/// X<T>::value. The difference, however, is that an 1370/// DependentScopeDeclRefExpr node is used only within C++ templates when 1371/// the qualification (e.g., X<T>::) refers to a dependent type. In 1372/// this case, X<T>::value cannot resolve to a declaration because the 1373/// declaration will differ from on instantiation of X<T> to the 1374/// next. Therefore, DependentScopeDeclRefExpr keeps track of the 1375/// qualifier (X<T>::) and the name of the entity being referenced 1376/// ("value"). Such expressions will instantiate to a DeclRefExpr once the 1377/// declaration can be found. 1378class DependentScopeDeclRefExpr : public Expr { 1379 /// The name of the entity we will be referencing. 1380 DeclarationName Name; 1381 1382 /// Location of the name of the declaration we're referencing. 1383 SourceLocation Loc; 1384 1385 /// QualifierRange - The source range that covers the 1386 /// nested-name-specifier. 1387 SourceRange QualifierRange; 1388 1389 /// \brief The nested-name-specifier that qualifies this unresolved 1390 /// declaration name. 1391 NestedNameSpecifier *Qualifier; 1392 1393 /// \brief Whether the name includes explicit template arguments. 1394 bool HasExplicitTemplateArgs; 1395 1396 DependentScopeDeclRefExpr(QualType T, 1397 NestedNameSpecifier *Qualifier, 1398 SourceRange QualifierRange, 1399 DeclarationName Name, 1400 SourceLocation NameLoc, 1401 bool HasExplicitTemplateArgs) 1402 : Expr(DependentScopeDeclRefExprClass, T, true, true), 1403 Name(Name), Loc(NameLoc), 1404 QualifierRange(QualifierRange), Qualifier(Qualifier), 1405 HasExplicitTemplateArgs(HasExplicitTemplateArgs) 1406 {} 1407 1408public: 1409 static DependentScopeDeclRefExpr *Create(ASTContext &C, 1410 NestedNameSpecifier *Qualifier, 1411 SourceRange QualifierRange, 1412 DeclarationName Name, 1413 SourceLocation NameLoc, 1414 const TemplateArgumentListInfo *TemplateArgs = 0); 1415 1416 /// \brief Retrieve the name that this expression refers to. 1417 DeclarationName getDeclName() const { return Name; } 1418 1419 /// \brief Retrieve the location of the name within the expression. 1420 SourceLocation getLocation() const { return Loc; } 1421 1422 /// \brief Retrieve the source range of the nested-name-specifier. 1423 SourceRange getQualifierRange() const { return QualifierRange; } 1424 1425 /// \brief Retrieve the nested-name-specifier that qualifies this 1426 /// declaration. 1427 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1428 1429 /// Determines whether this lookup had explicit template arguments. 1430 bool hasExplicitTemplateArgs() const { return HasExplicitTemplateArgs; } 1431 1432 // Note that, inconsistently with the explicit-template-argument AST 1433 // nodes, users are *forbidden* from calling these methods on objects 1434 // without explicit template arguments. 1435 1436 /// Gets a reference to the explicit template argument list. 1437 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1438 assert(hasExplicitTemplateArgs()); 1439 return *reinterpret_cast<const ExplicitTemplateArgumentList*>(this + 1); 1440 } 1441 1442 /// \brief Copies the template arguments (if present) into the given 1443 /// structure. 1444 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1445 getExplicitTemplateArgs().copyInto(List); 1446 } 1447 1448 SourceLocation getLAngleLoc() const { 1449 return getExplicitTemplateArgs().LAngleLoc; 1450 } 1451 1452 SourceLocation getRAngleLoc() const { 1453 return getExplicitTemplateArgs().RAngleLoc; 1454 } 1455 1456 TemplateArgumentLoc const *getTemplateArgs() const { 1457 return getExplicitTemplateArgs().getTemplateArgs(); 1458 } 1459 1460 unsigned getNumTemplateArgs() const { 1461 return getExplicitTemplateArgs().NumTemplateArgs; 1462 } 1463 1464 virtual SourceRange getSourceRange() const { 1465 SourceRange Range(QualifierRange.getBegin(), getLocation()); 1466 if (hasExplicitTemplateArgs()) 1467 Range.setEnd(getRAngleLoc()); 1468 return Range; 1469 } 1470 1471 static bool classof(const Stmt *T) { 1472 return T->getStmtClass() == DependentScopeDeclRefExprClass; 1473 } 1474 static bool classof(const DependentScopeDeclRefExpr *) { return true; } 1475 1476 virtual StmtIterator child_begin(); 1477 virtual StmtIterator child_end(); 1478}; 1479 1480class CXXExprWithTemporaries : public Expr { 1481 Stmt *SubExpr; 1482 1483 CXXTemporary **Temps; 1484 unsigned NumTemps; 1485 1486 CXXExprWithTemporaries(Expr *SubExpr, CXXTemporary **Temps, 1487 unsigned NumTemps); 1488 ~CXXExprWithTemporaries(); 1489 1490protected: 1491 virtual void DoDestroy(ASTContext &C); 1492 1493public: 1494 static CXXExprWithTemporaries *Create(ASTContext &C, Expr *SubExpr, 1495 CXXTemporary **Temps, 1496 unsigned NumTemps); 1497 1498 unsigned getNumTemporaries() const { return NumTemps; } 1499 CXXTemporary *getTemporary(unsigned i) { 1500 assert(i < NumTemps && "Index out of range"); 1501 return Temps[i]; 1502 } 1503 const CXXTemporary *getTemporary(unsigned i) const { 1504 return const_cast<CXXExprWithTemporaries*>(this)->getTemporary(i); 1505 } 1506 1507 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 1508 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 1509 void setSubExpr(Expr *E) { SubExpr = E; } 1510 1511 virtual SourceRange getSourceRange() const { 1512 return SubExpr->getSourceRange(); 1513 } 1514 1515 // Implement isa/cast/dyncast/etc. 1516 static bool classof(const Stmt *T) { 1517 return T->getStmtClass() == CXXExprWithTemporariesClass; 1518 } 1519 static bool classof(const CXXExprWithTemporaries *) { return true; } 1520 1521 // Iterators 1522 virtual child_iterator child_begin(); 1523 virtual child_iterator child_end(); 1524}; 1525 1526/// \brief Describes an explicit type conversion that uses functional 1527/// notion but could not be resolved because one or more arguments are 1528/// type-dependent. 1529/// 1530/// The explicit type conversions expressed by 1531/// CXXUnresolvedConstructExpr have the form \c T(a1, a2, ..., aN), 1532/// where \c T is some type and \c a1, a2, ..., aN are values, and 1533/// either \C T is a dependent type or one or more of the \c a's is 1534/// type-dependent. For example, this would occur in a template such 1535/// as: 1536/// 1537/// \code 1538/// template<typename T, typename A1> 1539/// inline T make_a(const A1& a1) { 1540/// return T(a1); 1541/// } 1542/// \endcode 1543/// 1544/// When the returned expression is instantiated, it may resolve to a 1545/// constructor call, conversion function call, or some kind of type 1546/// conversion. 1547class CXXUnresolvedConstructExpr : public Expr { 1548 /// \brief The starting location of the type 1549 SourceLocation TyBeginLoc; 1550 1551 /// \brief The type being constructed. 1552 QualType Type; 1553 1554 /// \brief The location of the left parentheses ('('). 1555 SourceLocation LParenLoc; 1556 1557 /// \brief The location of the right parentheses (')'). 1558 SourceLocation RParenLoc; 1559 1560 /// \brief The number of arguments used to construct the type. 1561 unsigned NumArgs; 1562 1563 CXXUnresolvedConstructExpr(SourceLocation TyBegin, 1564 QualType T, 1565 SourceLocation LParenLoc, 1566 Expr **Args, 1567 unsigned NumArgs, 1568 SourceLocation RParenLoc); 1569 1570public: 1571 static CXXUnresolvedConstructExpr *Create(ASTContext &C, 1572 SourceLocation TyBegin, 1573 QualType T, 1574 SourceLocation LParenLoc, 1575 Expr **Args, 1576 unsigned NumArgs, 1577 SourceLocation RParenLoc); 1578 1579 /// \brief Retrieve the source location where the type begins. 1580 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 1581 void setTypeBeginLoc(SourceLocation L) { TyBeginLoc = L; } 1582 1583 /// \brief Retrieve the type that is being constructed, as specified 1584 /// in the source code. 1585 QualType getTypeAsWritten() const { return Type; } 1586 void setTypeAsWritten(QualType T) { Type = T; } 1587 1588 /// \brief Retrieve the location of the left parentheses ('(') that 1589 /// precedes the argument list. 1590 SourceLocation getLParenLoc() const { return LParenLoc; } 1591 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 1592 1593 /// \brief Retrieve the location of the right parentheses (')') that 1594 /// follows the argument list. 1595 SourceLocation getRParenLoc() const { return RParenLoc; } 1596 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1597 1598 /// \brief Retrieve the number of arguments. 1599 unsigned arg_size() const { return NumArgs; } 1600 1601 typedef Expr** arg_iterator; 1602 arg_iterator arg_begin() { return reinterpret_cast<Expr**>(this + 1); } 1603 arg_iterator arg_end() { return arg_begin() + NumArgs; } 1604 1605 Expr *getArg(unsigned I) { 1606 assert(I < NumArgs && "Argument index out-of-range"); 1607 return *(arg_begin() + I); 1608 } 1609 1610 virtual SourceRange getSourceRange() const { 1611 return SourceRange(TyBeginLoc, RParenLoc); 1612 } 1613 static bool classof(const Stmt *T) { 1614 return T->getStmtClass() == CXXUnresolvedConstructExprClass; 1615 } 1616 static bool classof(const CXXUnresolvedConstructExpr *) { return true; } 1617 1618 // Iterators 1619 virtual child_iterator child_begin(); 1620 virtual child_iterator child_end(); 1621}; 1622 1623/// \brief Represents a C++ member access expression where the actual 1624/// member referenced could not be resolved because the base 1625/// expression or the member name was dependent. 1626/// 1627/// Like UnresolvedMemberExprs, these can be either implicit or 1628/// explicit accesses. It is only possible to get one of these with 1629/// an implicit access if a qualifier is provided. 1630class CXXDependentScopeMemberExpr : public Expr { 1631 /// \brief The expression for the base pointer or class reference, 1632 /// e.g., the \c x in x.f. Can be null in implicit accesses. 1633 Stmt *Base; 1634 1635 /// \brief The type of the base expression. Never null, even for 1636 /// implicit accesses. 1637 QualType BaseType; 1638 1639 /// \brief Whether this member expression used the '->' operator or 1640 /// the '.' operator. 1641 bool IsArrow : 1; 1642 1643 /// \brief Whether this member expression has explicitly-specified template 1644 /// arguments. 1645 bool HasExplicitTemplateArgs : 1; 1646 1647 /// \brief The location of the '->' or '.' operator. 1648 SourceLocation OperatorLoc; 1649 1650 /// \brief The nested-name-specifier that precedes the member name, if any. 1651 NestedNameSpecifier *Qualifier; 1652 1653 /// \brief The source range covering the nested name specifier. 1654 SourceRange QualifierRange; 1655 1656 /// \brief In a qualified member access expression such as t->Base::f, this 1657 /// member stores the resolves of name lookup in the context of the member 1658 /// access expression, to be used at instantiation time. 1659 /// 1660 /// FIXME: This member, along with the Qualifier and QualifierRange, could 1661 /// be stuck into a structure that is optionally allocated at the end of 1662 /// the CXXDependentScopeMemberExpr, to save space in the common case. 1663 NamedDecl *FirstQualifierFoundInScope; 1664 1665 /// \brief The member to which this member expression refers, which 1666 /// can be name, overloaded operator, or destructor. 1667 /// FIXME: could also be a template-id 1668 DeclarationName Member; 1669 1670 /// \brief The location of the member name. 1671 SourceLocation MemberLoc; 1672 1673 /// \brief Retrieve the explicit template argument list that followed the 1674 /// member template name, if any. 1675 ExplicitTemplateArgumentList *getExplicitTemplateArgumentList() { 1676 assert(HasExplicitTemplateArgs); 1677 return reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 1678 } 1679 1680 /// \brief Retrieve the explicit template argument list that followed the 1681 /// member template name, if any. 1682 const ExplicitTemplateArgumentList *getExplicitTemplateArgumentList() const { 1683 return const_cast<CXXDependentScopeMemberExpr *>(this) 1684 ->getExplicitTemplateArgumentList(); 1685 } 1686 1687 CXXDependentScopeMemberExpr(ASTContext &C, 1688 Expr *Base, QualType BaseType, bool IsArrow, 1689 SourceLocation OperatorLoc, 1690 NestedNameSpecifier *Qualifier, 1691 SourceRange QualifierRange, 1692 NamedDecl *FirstQualifierFoundInScope, 1693 DeclarationName Member, 1694 SourceLocation MemberLoc, 1695 const TemplateArgumentListInfo *TemplateArgs); 1696 1697public: 1698 CXXDependentScopeMemberExpr(ASTContext &C, 1699 Expr *Base, QualType BaseType, 1700 bool IsArrow, 1701 SourceLocation OperatorLoc, 1702 NestedNameSpecifier *Qualifier, 1703 SourceRange QualifierRange, 1704 NamedDecl *FirstQualifierFoundInScope, 1705 DeclarationName Member, 1706 SourceLocation MemberLoc) 1707 : Expr(CXXDependentScopeMemberExprClass, C.DependentTy, true, true), 1708 Base(Base), BaseType(BaseType), IsArrow(IsArrow), 1709 HasExplicitTemplateArgs(false), OperatorLoc(OperatorLoc), 1710 Qualifier(Qualifier), QualifierRange(QualifierRange), 1711 FirstQualifierFoundInScope(FirstQualifierFoundInScope), 1712 Member(Member), MemberLoc(MemberLoc) { } 1713 1714 static CXXDependentScopeMemberExpr * 1715 Create(ASTContext &C, 1716 Expr *Base, QualType BaseType, bool IsArrow, 1717 SourceLocation OperatorLoc, 1718 NestedNameSpecifier *Qualifier, 1719 SourceRange QualifierRange, 1720 NamedDecl *FirstQualifierFoundInScope, 1721 DeclarationName Member, 1722 SourceLocation MemberLoc, 1723 const TemplateArgumentListInfo *TemplateArgs); 1724 1725 /// \brief True if this is an implicit access, i.e. one in which the 1726 /// member being accessed was not written in the source. The source 1727 /// location of the operator is invalid in this case. 1728 bool isImplicitAccess() const { return Base == 0; } 1729 1730 /// \brief Retrieve the base object of this member expressions, 1731 /// e.g., the \c x in \c x.m. 1732 Expr *getBase() const { 1733 assert(!isImplicitAccess()); 1734 return cast<Expr>(Base); 1735 } 1736 void setBase(Expr *E) { Base = E; } 1737 1738 QualType getBaseType() const { return BaseType; } 1739 1740 /// \brief Determine whether this member expression used the '->' 1741 /// operator; otherwise, it used the '.' operator. 1742 bool isArrow() const { return IsArrow; } 1743 void setArrow(bool A) { IsArrow = A; } 1744 1745 /// \brief Retrieve the location of the '->' or '.' operator. 1746 SourceLocation getOperatorLoc() const { return OperatorLoc; } 1747 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 1748 1749 /// \brief Retrieve the nested-name-specifier that qualifies the member 1750 /// name. 1751 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1752 1753 /// \brief Retrieve the source range covering the nested-name-specifier 1754 /// that qualifies the member name. 1755 SourceRange getQualifierRange() const { return QualifierRange; } 1756 1757 /// \brief Retrieve the first part of the nested-name-specifier that was 1758 /// found in the scope of the member access expression when the member access 1759 /// was initially parsed. 1760 /// 1761 /// This function only returns a useful result when member access expression 1762 /// uses a qualified member name, e.g., "x.Base::f". Here, the declaration 1763 /// returned by this function describes what was found by unqualified name 1764 /// lookup for the identifier "Base" within the scope of the member access 1765 /// expression itself. At template instantiation time, this information is 1766 /// combined with the results of name lookup into the type of the object 1767 /// expression itself (the class type of x). 1768 NamedDecl *getFirstQualifierFoundInScope() const { 1769 return FirstQualifierFoundInScope; 1770 } 1771 1772 /// \brief Retrieve the name of the member that this expression 1773 /// refers to. 1774 DeclarationName getMember() const { return Member; } 1775 void setMember(DeclarationName N) { Member = N; } 1776 1777 // \brief Retrieve the location of the name of the member that this 1778 // expression refers to. 1779 SourceLocation getMemberLoc() const { return MemberLoc; } 1780 void setMemberLoc(SourceLocation L) { MemberLoc = L; } 1781 1782 /// \brief Determines whether this member expression actually had a C++ 1783 /// template argument list explicitly specified, e.g., x.f<int>. 1784 bool hasExplicitTemplateArgs() const { 1785 return HasExplicitTemplateArgs; 1786 } 1787 1788 /// \brief Copies the template arguments (if present) into the given 1789 /// structure. 1790 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1791 assert(HasExplicitTemplateArgs); 1792 getExplicitTemplateArgumentList()->copyInto(List); 1793 } 1794 1795 /// \brief Retrieve the location of the left angle bracket following the 1796 /// member name ('<'), if any. 1797 SourceLocation getLAngleLoc() const { 1798 assert(HasExplicitTemplateArgs); 1799 return getExplicitTemplateArgumentList()->LAngleLoc; 1800 } 1801 1802 /// \brief Retrieve the template arguments provided as part of this 1803 /// template-id. 1804 const TemplateArgumentLoc *getTemplateArgs() const { 1805 assert(HasExplicitTemplateArgs); 1806 return getExplicitTemplateArgumentList()->getTemplateArgs(); 1807 } 1808 1809 /// \brief Retrieve the number of template arguments provided as part of this 1810 /// template-id. 1811 unsigned getNumTemplateArgs() const { 1812 assert(HasExplicitTemplateArgs); 1813 return getExplicitTemplateArgumentList()->NumTemplateArgs; 1814 } 1815 1816 /// \brief Retrieve the location of the right angle bracket following the 1817 /// template arguments ('>'). 1818 SourceLocation getRAngleLoc() const { 1819 assert(HasExplicitTemplateArgs); 1820 return getExplicitTemplateArgumentList()->RAngleLoc; 1821 } 1822 1823 virtual SourceRange getSourceRange() const { 1824 SourceRange Range; 1825 if (!isImplicitAccess()) 1826 Range.setBegin(Base->getSourceRange().getBegin()); 1827 else if (getQualifier()) 1828 Range.setBegin(getQualifierRange().getBegin()); 1829 else 1830 Range.setBegin(MemberLoc); 1831 1832 if (hasExplicitTemplateArgs()) 1833 Range.setEnd(getRAngleLoc()); 1834 else 1835 Range.setEnd(MemberLoc); 1836 return Range; 1837 } 1838 1839 static bool classof(const Stmt *T) { 1840 return T->getStmtClass() == CXXDependentScopeMemberExprClass; 1841 } 1842 static bool classof(const CXXDependentScopeMemberExpr *) { return true; } 1843 1844 // Iterators 1845 virtual child_iterator child_begin(); 1846 virtual child_iterator child_end(); 1847}; 1848 1849/// \brief Represents a C++ member access expression for which lookup 1850/// produced a set of overloaded functions. 1851/// 1852/// The member access may be explicit or implicit: 1853/// struct A { 1854/// int a, b; 1855/// int explicitAccess() { return this->a + this->A::b; } 1856/// int implicitAccess() { return a + A::b; } 1857/// }; 1858/// 1859/// In the final AST, an explicit access always becomes a MemberExpr. 1860/// An implicit access may become either a MemberExpr or a 1861/// DeclRefExpr, depending on whether the member is static. 1862class UnresolvedMemberExpr : public OverloadExpr { 1863 /// \brief Whether this member expression used the '->' operator or 1864 /// the '.' operator. 1865 bool IsArrow : 1; 1866 1867 /// \brief Whether the lookup results contain an unresolved using 1868 /// declaration. 1869 bool HasUnresolvedUsing : 1; 1870 1871 /// \brief The expression for the base pointer or class reference, 1872 /// e.g., the \c x in x.f. This can be null if this is an 'unbased' 1873 /// member expression 1874 Stmt *Base; 1875 1876 /// \brief The type of the base expression; never null. 1877 QualType BaseType; 1878 1879 /// \brief The location of the '->' or '.' operator. 1880 SourceLocation OperatorLoc; 1881 1882 UnresolvedMemberExpr(QualType T, bool Dependent, 1883 bool HasUnresolvedUsing, 1884 Expr *Base, QualType BaseType, bool IsArrow, 1885 SourceLocation OperatorLoc, 1886 NestedNameSpecifier *Qualifier, 1887 SourceRange QualifierRange, 1888 DeclarationName Member, 1889 SourceLocation MemberLoc, 1890 const TemplateArgumentListInfo *TemplateArgs); 1891 1892public: 1893 static UnresolvedMemberExpr * 1894 Create(ASTContext &C, bool Dependent, bool HasUnresolvedUsing, 1895 Expr *Base, QualType BaseType, bool IsArrow, 1896 SourceLocation OperatorLoc, 1897 NestedNameSpecifier *Qualifier, 1898 SourceRange QualifierRange, 1899 DeclarationName Member, 1900 SourceLocation MemberLoc, 1901 const TemplateArgumentListInfo *TemplateArgs); 1902 1903 /// \brief True if this is an implicit access, i.e. one in which the 1904 /// member being accessed was not written in the source. The source 1905 /// location of the operator is invalid in this case. 1906 bool isImplicitAccess() const { return Base == 0; } 1907 1908 /// \brief Retrieve the base object of this member expressions, 1909 /// e.g., the \c x in \c x.m. 1910 Expr *getBase() { 1911 assert(!isImplicitAccess()); 1912 return cast<Expr>(Base); 1913 } 1914 void setBase(Expr *E) { Base = E; } 1915 1916 QualType getBaseType() const { return BaseType; } 1917 1918 /// \brief Determine whether this member expression used the '->' 1919 /// operator; otherwise, it used the '.' operator. 1920 bool isArrow() const { return IsArrow; } 1921 void setArrow(bool A) { IsArrow = A; } 1922 1923 /// \brief Retrieve the location of the '->' or '.' operator. 1924 SourceLocation getOperatorLoc() const { return OperatorLoc; } 1925 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 1926 1927 /// \brief Retrieves the naming class of this lookup. 1928 CXXRecordDecl *getNamingClass() const; 1929 1930 /// \brief Retrieve the name of the member that this expression 1931 /// refers to. 1932 DeclarationName getMemberName() const { return getName(); } 1933 void setMemberName(DeclarationName N) { setName(N); } 1934 1935 // \brief Retrieve the location of the name of the member that this 1936 // expression refers to. 1937 SourceLocation getMemberLoc() const { return getNameLoc(); } 1938 void setMemberLoc(SourceLocation L) { setNameLoc(L); } 1939 1940 /// \brief Retrieve the explicit template argument list that followed the 1941 /// member template name. 1942 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 1943 assert(hasExplicitTemplateArgs()); 1944 return *reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 1945 } 1946 1947 /// \brief Retrieve the explicit template argument list that followed the 1948 /// member template name, if any. 1949 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1950 assert(hasExplicitTemplateArgs()); 1951 return *reinterpret_cast<const ExplicitTemplateArgumentList *>(this + 1); 1952 } 1953 1954 /// \brief Copies the template arguments into the given structure. 1955 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1956 getExplicitTemplateArgs().copyInto(List); 1957 } 1958 1959 /// \brief Retrieve the location of the left angle bracket following 1960 /// the member name ('<'). 1961 SourceLocation getLAngleLoc() const { 1962 return getExplicitTemplateArgs().LAngleLoc; 1963 } 1964 1965 /// \brief Retrieve the template arguments provided as part of this 1966 /// template-id. 1967 const TemplateArgumentLoc *getTemplateArgs() const { 1968 return getExplicitTemplateArgs().getTemplateArgs(); 1969 } 1970 1971 /// \brief Retrieve the number of template arguments provided as 1972 /// part of this template-id. 1973 unsigned getNumTemplateArgs() const { 1974 return getExplicitTemplateArgs().NumTemplateArgs; 1975 } 1976 1977 /// \brief Retrieve the location of the right angle bracket 1978 /// following the template arguments ('>'). 1979 SourceLocation getRAngleLoc() const { 1980 return getExplicitTemplateArgs().RAngleLoc; 1981 } 1982 1983 virtual SourceRange getSourceRange() const { 1984 SourceRange Range; 1985 if (!isImplicitAccess()) 1986 Range.setBegin(Base->getSourceRange().getBegin()); 1987 else if (getQualifier()) 1988 Range.setBegin(getQualifierRange().getBegin()); 1989 else 1990 Range.setBegin(getMemberLoc()); 1991 1992 if (hasExplicitTemplateArgs()) 1993 Range.setEnd(getRAngleLoc()); 1994 else 1995 Range.setEnd(getMemberLoc()); 1996 return Range; 1997 } 1998 1999 static bool classof(const Stmt *T) { 2000 return T->getStmtClass() == UnresolvedMemberExprClass; 2001 } 2002 static bool classof(const UnresolvedMemberExpr *) { return true; } 2003 2004 // Iterators 2005 virtual child_iterator child_begin(); 2006 virtual child_iterator child_end(); 2007}; 2008 2009inline ExplicitTemplateArgumentList &OverloadExpr::getExplicitTemplateArgs() { 2010 if (isa<UnresolvedLookupExpr>(this)) 2011 return cast<UnresolvedLookupExpr>(this)->getExplicitTemplateArgs(); 2012 else 2013 return cast<UnresolvedMemberExpr>(this)->getExplicitTemplateArgs(); 2014} 2015 2016} // end namespace clang 2017 2018#endif 2019