ExprCXX.h revision b8e39236f05b2f71fb2632673948499fd54e2a34
1//===--- ExprCXX.h - Classes for representing expressions -------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Expr interface and subclasses for C++ expressions. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_EXPRCXX_H 15#define LLVM_CLANG_AST_EXPRCXX_H 16 17#include "clang/Basic/TypeTraits.h" 18#include "clang/AST/Expr.h" 19#include "clang/AST/UnresolvedSet.h" 20#include "clang/AST/TemplateBase.h" 21 22namespace clang { 23 24 class CXXConstructorDecl; 25 class CXXDestructorDecl; 26 class CXXMethodDecl; 27 class CXXTemporary; 28 class TemplateArgumentListInfo; 29 30//===--------------------------------------------------------------------===// 31// C++ Expressions. 32//===--------------------------------------------------------------------===// 33 34/// \brief A call to an overloaded operator written using operator 35/// syntax. 36/// 37/// Represents a call to an overloaded operator written using operator 38/// syntax, e.g., "x + y" or "*p". While semantically equivalent to a 39/// normal call, this AST node provides better information about the 40/// syntactic representation of the call. 41/// 42/// In a C++ template, this expression node kind will be used whenever 43/// any of the arguments are type-dependent. In this case, the 44/// function itself will be a (possibly empty) set of functions and 45/// function templates that were found by name lookup at template 46/// definition time. 47class CXXOperatorCallExpr : public CallExpr { 48 /// \brief The overloaded operator. 49 OverloadedOperatorKind Operator; 50 51public: 52 CXXOperatorCallExpr(ASTContext& C, OverloadedOperatorKind Op, Expr *fn, 53 Expr **args, unsigned numargs, QualType t, 54 SourceLocation operatorloc) 55 : CallExpr(C, CXXOperatorCallExprClass, fn, args, numargs, t, operatorloc), 56 Operator(Op) {} 57 explicit CXXOperatorCallExpr(ASTContext& C, EmptyShell Empty) : 58 CallExpr(C, CXXOperatorCallExprClass, Empty) { } 59 60 61 /// getOperator - Returns the kind of overloaded operator that this 62 /// expression refers to. 63 OverloadedOperatorKind getOperator() const { return Operator; } 64 void setOperator(OverloadedOperatorKind Kind) { Operator = Kind; } 65 66 /// getOperatorLoc - Returns the location of the operator symbol in 67 /// the expression. When @c getOperator()==OO_Call, this is the 68 /// location of the right parentheses; when @c 69 /// getOperator()==OO_Subscript, this is the location of the right 70 /// bracket. 71 SourceLocation getOperatorLoc() const { return getRParenLoc(); } 72 73 virtual SourceRange getSourceRange() const; 74 75 static bool classof(const Stmt *T) { 76 return T->getStmtClass() == CXXOperatorCallExprClass; 77 } 78 static bool classof(const CXXOperatorCallExpr *) { return true; } 79}; 80 81/// CXXMemberCallExpr - Represents a call to a member function that 82/// may be written either with member call syntax (e.g., "obj.func()" 83/// or "objptr->func()") or with normal function-call syntax 84/// ("func()") within a member function that ends up calling a member 85/// function. The callee in either case is a MemberExpr that contains 86/// both the object argument and the member function, while the 87/// arguments are the arguments within the parentheses (not including 88/// the object argument). 89class CXXMemberCallExpr : public CallExpr { 90public: 91 CXXMemberCallExpr(ASTContext &C, Expr *fn, Expr **args, unsigned numargs, 92 QualType t, SourceLocation rparenloc) 93 : CallExpr(C, CXXMemberCallExprClass, fn, args, numargs, t, rparenloc) {} 94 95 CXXMemberCallExpr(ASTContext &C, EmptyShell Empty) 96 : CallExpr(C, CXXMemberCallExprClass, Empty) { } 97 98 /// getImplicitObjectArgument - Retrieves the implicit object 99 /// argument for the member call. For example, in "x.f(5)", this 100 /// operation would return "x". 101 Expr *getImplicitObjectArgument(); 102 103 /// getRecordDecl - Retrieves the CXXRecordDecl for the underlying type of 104 /// the implicit object argument. Note that this is may not be the same 105 /// declaration as that of the class context of the CXXMethodDecl which this 106 /// function is calling. 107 /// FIXME: Returns 0 for member pointer call exprs. 108 CXXRecordDecl *getRecordDecl(); 109 110 virtual SourceRange getSourceRange() const; 111 112 static bool classof(const Stmt *T) { 113 return T->getStmtClass() == CXXMemberCallExprClass; 114 } 115 static bool classof(const CXXMemberCallExpr *) { return true; } 116}; 117 118/// CXXNamedCastExpr - Abstract class common to all of the C++ "named" 119/// casts, @c static_cast, @c dynamic_cast, @c reinterpret_cast, or @c 120/// const_cast. 121/// 122/// This abstract class is inherited by all of the classes 123/// representing "named" casts, e.g., CXXStaticCastExpr, 124/// CXXDynamicCastExpr, CXXReinterpretCastExpr, and CXXConstCastExpr. 125class CXXNamedCastExpr : public ExplicitCastExpr { 126private: 127 SourceLocation Loc; // the location of the casting op 128 129protected: 130 CXXNamedCastExpr(StmtClass SC, QualType ty, CastKind kind, Expr *op, 131 unsigned PathSize, TypeSourceInfo *writtenTy, 132 SourceLocation l) 133 : ExplicitCastExpr(SC, ty, kind, op, PathSize, writtenTy), Loc(l) {} 134 135 explicit CXXNamedCastExpr(StmtClass SC, EmptyShell Shell, unsigned PathSize) 136 : ExplicitCastExpr(SC, Shell, PathSize) { } 137 138public: 139 const char *getCastName() const; 140 141 /// \brief Retrieve the location of the cast operator keyword, e.g., 142 /// "static_cast". 143 SourceLocation getOperatorLoc() const { return Loc; } 144 void setOperatorLoc(SourceLocation L) { Loc = L; } 145 146 virtual SourceRange getSourceRange() const { 147 return SourceRange(Loc, getSubExpr()->getSourceRange().getEnd()); 148 } 149 static bool classof(const Stmt *T) { 150 switch (T->getStmtClass()) { 151 case CXXStaticCastExprClass: 152 case CXXDynamicCastExprClass: 153 case CXXReinterpretCastExprClass: 154 case CXXConstCastExprClass: 155 return true; 156 default: 157 return false; 158 } 159 } 160 static bool classof(const CXXNamedCastExpr *) { return true; } 161}; 162 163/// CXXStaticCastExpr - A C++ @c static_cast expression (C++ [expr.static.cast]). 164/// 165/// This expression node represents a C++ static cast, e.g., 166/// @c static_cast<int>(1.0). 167class CXXStaticCastExpr : public CXXNamedCastExpr { 168 CXXStaticCastExpr(QualType ty, CastKind kind, Expr *op, 169 unsigned pathSize, TypeSourceInfo *writtenTy, 170 SourceLocation l) 171 : CXXNamedCastExpr(CXXStaticCastExprClass, ty, kind, op, pathSize, 172 writtenTy, l) {} 173 174 explicit CXXStaticCastExpr(EmptyShell Empty, unsigned PathSize) 175 : CXXNamedCastExpr(CXXStaticCastExprClass, Empty, PathSize) { } 176 177public: 178 static CXXStaticCastExpr *Create(ASTContext &Context, QualType T, 179 CastKind K, Expr *Op, 180 const CXXCastPath *Path, 181 TypeSourceInfo *Written, SourceLocation L); 182 static CXXStaticCastExpr *CreateEmpty(ASTContext &Context, 183 unsigned PathSize); 184 185 static bool classof(const Stmt *T) { 186 return T->getStmtClass() == CXXStaticCastExprClass; 187 } 188 static bool classof(const CXXStaticCastExpr *) { return true; } 189}; 190 191/// CXXDynamicCastExpr - A C++ @c dynamic_cast expression 192/// (C++ [expr.dynamic.cast]), which may perform a run-time check to 193/// determine how to perform the type cast. 194/// 195/// This expression node represents a dynamic cast, e.g., 196/// @c dynamic_cast<Derived*>(BasePtr). 197class CXXDynamicCastExpr : public CXXNamedCastExpr { 198 CXXDynamicCastExpr(QualType ty, CastKind kind, Expr *op, 199 unsigned pathSize, TypeSourceInfo *writtenTy, 200 SourceLocation l) 201 : CXXNamedCastExpr(CXXDynamicCastExprClass, ty, kind, op, pathSize, 202 writtenTy, l) {} 203 204 explicit CXXDynamicCastExpr(EmptyShell Empty, unsigned pathSize) 205 : CXXNamedCastExpr(CXXDynamicCastExprClass, Empty, pathSize) { } 206 207public: 208 static CXXDynamicCastExpr *Create(ASTContext &Context, QualType T, 209 CastKind Kind, Expr *Op, 210 const CXXCastPath *Path, 211 TypeSourceInfo *Written, SourceLocation L); 212 213 static CXXDynamicCastExpr *CreateEmpty(ASTContext &Context, 214 unsigned pathSize); 215 216 static bool classof(const Stmt *T) { 217 return T->getStmtClass() == CXXDynamicCastExprClass; 218 } 219 static bool classof(const CXXDynamicCastExpr *) { return true; } 220}; 221 222/// CXXReinterpretCastExpr - A C++ @c reinterpret_cast expression (C++ 223/// [expr.reinterpret.cast]), which provides a differently-typed view 224/// of a value but performs no actual work at run time. 225/// 226/// This expression node represents a reinterpret cast, e.g., 227/// @c reinterpret_cast<int>(VoidPtr). 228class CXXReinterpretCastExpr : public CXXNamedCastExpr { 229 CXXReinterpretCastExpr(QualType ty, CastKind kind, Expr *op, 230 unsigned pathSize, 231 TypeSourceInfo *writtenTy, SourceLocation l) 232 : CXXNamedCastExpr(CXXReinterpretCastExprClass, ty, kind, op, pathSize, 233 writtenTy, l) {} 234 235 CXXReinterpretCastExpr(EmptyShell Empty, unsigned pathSize) 236 : CXXNamedCastExpr(CXXReinterpretCastExprClass, Empty, pathSize) { } 237 238public: 239 static CXXReinterpretCastExpr *Create(ASTContext &Context, QualType T, 240 CastKind Kind, Expr *Op, 241 const CXXCastPath *Path, 242 TypeSourceInfo *WrittenTy, SourceLocation L); 243 static CXXReinterpretCastExpr *CreateEmpty(ASTContext &Context, 244 unsigned pathSize); 245 246 static bool classof(const Stmt *T) { 247 return T->getStmtClass() == CXXReinterpretCastExprClass; 248 } 249 static bool classof(const CXXReinterpretCastExpr *) { return true; } 250}; 251 252/// CXXConstCastExpr - A C++ @c const_cast expression (C++ [expr.const.cast]), 253/// which can remove type qualifiers but does not change the underlying value. 254/// 255/// This expression node represents a const cast, e.g., 256/// @c const_cast<char*>(PtrToConstChar). 257class CXXConstCastExpr : public CXXNamedCastExpr { 258 CXXConstCastExpr(QualType ty, Expr *op, TypeSourceInfo *writtenTy, 259 SourceLocation l) 260 : CXXNamedCastExpr(CXXConstCastExprClass, ty, CK_NoOp, op, 261 0, writtenTy, l) {} 262 263 explicit CXXConstCastExpr(EmptyShell Empty) 264 : CXXNamedCastExpr(CXXConstCastExprClass, Empty, 0) { } 265 266public: 267 static CXXConstCastExpr *Create(ASTContext &Context, QualType T, Expr *Op, 268 TypeSourceInfo *WrittenTy, SourceLocation L); 269 static CXXConstCastExpr *CreateEmpty(ASTContext &Context); 270 271 static bool classof(const Stmt *T) { 272 return T->getStmtClass() == CXXConstCastExprClass; 273 } 274 static bool classof(const CXXConstCastExpr *) { return true; } 275}; 276 277/// CXXBoolLiteralExpr - [C++ 2.13.5] C++ Boolean Literal. 278/// 279class CXXBoolLiteralExpr : public Expr { 280 bool Value; 281 SourceLocation Loc; 282public: 283 CXXBoolLiteralExpr(bool val, QualType Ty, SourceLocation l) : 284 Expr(CXXBoolLiteralExprClass, Ty, false, false), Value(val), Loc(l) {} 285 286 explicit CXXBoolLiteralExpr(EmptyShell Empty) 287 : Expr(CXXBoolLiteralExprClass, Empty) { } 288 289 bool getValue() const { return Value; } 290 void setValue(bool V) { Value = V; } 291 292 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 293 294 SourceLocation getLocation() const { return Loc; } 295 void setLocation(SourceLocation L) { Loc = L; } 296 297 static bool classof(const Stmt *T) { 298 return T->getStmtClass() == CXXBoolLiteralExprClass; 299 } 300 static bool classof(const CXXBoolLiteralExpr *) { return true; } 301 302 // Iterators 303 virtual child_iterator child_begin(); 304 virtual child_iterator child_end(); 305}; 306 307/// CXXNullPtrLiteralExpr - [C++0x 2.14.7] C++ Pointer Literal 308class CXXNullPtrLiteralExpr : public Expr { 309 SourceLocation Loc; 310public: 311 CXXNullPtrLiteralExpr(QualType Ty, SourceLocation l) : 312 Expr(CXXNullPtrLiteralExprClass, Ty, false, false), Loc(l) {} 313 314 explicit CXXNullPtrLiteralExpr(EmptyShell Empty) 315 : Expr(CXXNullPtrLiteralExprClass, Empty) { } 316 317 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 318 319 SourceLocation getLocation() const { return Loc; } 320 void setLocation(SourceLocation L) { Loc = L; } 321 322 static bool classof(const Stmt *T) { 323 return T->getStmtClass() == CXXNullPtrLiteralExprClass; 324 } 325 static bool classof(const CXXNullPtrLiteralExpr *) { return true; } 326 327 virtual child_iterator child_begin(); 328 virtual child_iterator child_end(); 329}; 330 331/// CXXTypeidExpr - A C++ @c typeid expression (C++ [expr.typeid]), which gets 332/// the type_info that corresponds to the supplied type, or the (possibly 333/// dynamic) type of the supplied expression. 334/// 335/// This represents code like @c typeid(int) or @c typeid(*objPtr) 336class CXXTypeidExpr : public Expr { 337private: 338 llvm::PointerUnion<Stmt *, TypeSourceInfo *> Operand; 339 SourceRange Range; 340 341public: 342 CXXTypeidExpr(QualType Ty, TypeSourceInfo *Operand, SourceRange R) 343 : Expr(CXXTypeidExprClass, Ty, 344 // typeid is never type-dependent (C++ [temp.dep.expr]p4) 345 false, 346 // typeid is value-dependent if the type or expression are dependent 347 Operand->getType()->isDependentType()), 348 Operand(Operand), Range(R) { } 349 350 CXXTypeidExpr(QualType Ty, Expr *Operand, SourceRange R) 351 : Expr(CXXTypeidExprClass, Ty, 352 // typeid is never type-dependent (C++ [temp.dep.expr]p4) 353 false, 354 // typeid is value-dependent if the type or expression are dependent 355 Operand->isTypeDependent() || Operand->isValueDependent()), 356 Operand(Operand), Range(R) { } 357 358 CXXTypeidExpr(EmptyShell Empty, bool isExpr) 359 : Expr(CXXTypeidExprClass, Empty) { 360 if (isExpr) 361 Operand = (Expr*)0; 362 else 363 Operand = (TypeSourceInfo*)0; 364 } 365 366 bool isTypeOperand() const { return Operand.is<TypeSourceInfo *>(); } 367 368 /// \brief Retrieves the type operand of this typeid() expression after 369 /// various required adjustments (removing reference types, cv-qualifiers). 370 QualType getTypeOperand() const; 371 372 /// \brief Retrieve source information for the type operand. 373 TypeSourceInfo *getTypeOperandSourceInfo() const { 374 assert(isTypeOperand() && "Cannot call getTypeOperand for typeid(expr)"); 375 return Operand.get<TypeSourceInfo *>(); 376 } 377 378 void setTypeOperandSourceInfo(TypeSourceInfo *TSI) { 379 assert(isTypeOperand() && "Cannot call getTypeOperand for typeid(expr)"); 380 Operand = TSI; 381 } 382 383 Expr *getExprOperand() const { 384 assert(!isTypeOperand() && "Cannot call getExprOperand for typeid(type)"); 385 return static_cast<Expr*>(Operand.get<Stmt *>()); 386 } 387 388 void setExprOperand(Expr *E) { 389 assert(!isTypeOperand() && "Cannot call getExprOperand for typeid(type)"); 390 Operand = E; 391 } 392 393 virtual SourceRange getSourceRange() const { return Range; } 394 void setSourceRange(SourceRange R) { Range = R; } 395 396 static bool classof(const Stmt *T) { 397 return T->getStmtClass() == CXXTypeidExprClass; 398 } 399 static bool classof(const CXXTypeidExpr *) { return true; } 400 401 // Iterators 402 virtual child_iterator child_begin(); 403 virtual child_iterator child_end(); 404}; 405 406/// CXXUuidofExpr - A microsoft C++ @c __uuidof expression, which gets 407/// the _GUID that corresponds to the supplied type or expression. 408/// 409/// This represents code like @c __uuidof(COMTYPE) or @c __uuidof(*comPtr) 410class CXXUuidofExpr : public Expr { 411private: 412 llvm::PointerUnion<Stmt *, TypeSourceInfo *> Operand; 413 SourceRange Range; 414 415public: 416 CXXUuidofExpr(QualType Ty, TypeSourceInfo *Operand, SourceRange R) 417 : Expr(CXXUuidofExprClass, Ty, 418 false, Operand->getType()->isDependentType()), 419 Operand(Operand), Range(R) { } 420 421 CXXUuidofExpr(QualType Ty, Expr *Operand, SourceRange R) 422 : Expr(CXXUuidofExprClass, Ty, 423 false, Operand->isTypeDependent()), 424 Operand(Operand), Range(R) { } 425 426 CXXUuidofExpr(EmptyShell Empty, bool isExpr) 427 : Expr(CXXUuidofExprClass, Empty) { 428 if (isExpr) 429 Operand = (Expr*)0; 430 else 431 Operand = (TypeSourceInfo*)0; 432 } 433 434 bool isTypeOperand() const { return Operand.is<TypeSourceInfo *>(); } 435 436 /// \brief Retrieves the type operand of this __uuidof() expression after 437 /// various required adjustments (removing reference types, cv-qualifiers). 438 QualType getTypeOperand() const; 439 440 /// \brief Retrieve source information for the type operand. 441 TypeSourceInfo *getTypeOperandSourceInfo() const { 442 assert(isTypeOperand() && "Cannot call getTypeOperand for __uuidof(expr)"); 443 return Operand.get<TypeSourceInfo *>(); 444 } 445 446 void setTypeOperandSourceInfo(TypeSourceInfo *TSI) { 447 assert(isTypeOperand() && "Cannot call getTypeOperand for __uuidof(expr)"); 448 Operand = TSI; 449 } 450 451 Expr *getExprOperand() const { 452 assert(!isTypeOperand() && "Cannot call getExprOperand for __uuidof(type)"); 453 return static_cast<Expr*>(Operand.get<Stmt *>()); 454 } 455 456 void setExprOperand(Expr *E) { 457 assert(!isTypeOperand() && "Cannot call getExprOperand for __uuidof(type)"); 458 Operand = E; 459 } 460 461 virtual SourceRange getSourceRange() const { return Range; } 462 void setSourceRange(SourceRange R) { Range = R; } 463 464 static bool classof(const Stmt *T) { 465 return T->getStmtClass() == CXXUuidofExprClass; 466 } 467 static bool classof(const CXXUuidofExpr *) { return true; } 468 469 // Iterators 470 virtual child_iterator child_begin(); 471 virtual child_iterator child_end(); 472}; 473 474/// CXXThisExpr - Represents the "this" expression in C++, which is a 475/// pointer to the object on which the current member function is 476/// executing (C++ [expr.prim]p3). Example: 477/// 478/// @code 479/// class Foo { 480/// public: 481/// void bar(); 482/// void test() { this->bar(); } 483/// }; 484/// @endcode 485class CXXThisExpr : public Expr { 486 SourceLocation Loc; 487 bool Implicit : 1; 488 489public: 490 CXXThisExpr(SourceLocation L, QualType Type, bool isImplicit) 491 : Expr(CXXThisExprClass, Type, 492 // 'this' is type-dependent if the class type of the enclosing 493 // member function is dependent (C++ [temp.dep.expr]p2) 494 Type->isDependentType(), Type->isDependentType()), 495 Loc(L), Implicit(isImplicit) { } 496 497 CXXThisExpr(EmptyShell Empty) : Expr(CXXThisExprClass, Empty) {} 498 499 SourceLocation getLocation() const { return Loc; } 500 void setLocation(SourceLocation L) { Loc = L; } 501 502 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 503 504 bool isImplicit() const { return Implicit; } 505 void setImplicit(bool I) { Implicit = I; } 506 507 static bool classof(const Stmt *T) { 508 return T->getStmtClass() == CXXThisExprClass; 509 } 510 static bool classof(const CXXThisExpr *) { return true; } 511 512 // Iterators 513 virtual child_iterator child_begin(); 514 virtual child_iterator child_end(); 515}; 516 517/// CXXThrowExpr - [C++ 15] C++ Throw Expression. This handles 518/// 'throw' and 'throw' assignment-expression. When 519/// assignment-expression isn't present, Op will be null. 520/// 521class CXXThrowExpr : public Expr { 522 Stmt *Op; 523 SourceLocation ThrowLoc; 524public: 525 // Ty is the void type which is used as the result type of the 526 // exepression. The l is the location of the throw keyword. expr 527 // can by null, if the optional expression to throw isn't present. 528 CXXThrowExpr(Expr *expr, QualType Ty, SourceLocation l) : 529 Expr(CXXThrowExprClass, Ty, false, false), Op(expr), ThrowLoc(l) {} 530 CXXThrowExpr(EmptyShell Empty) : Expr(CXXThrowExprClass, Empty) {} 531 532 const Expr *getSubExpr() const { return cast_or_null<Expr>(Op); } 533 Expr *getSubExpr() { return cast_or_null<Expr>(Op); } 534 void setSubExpr(Expr *E) { Op = E; } 535 536 SourceLocation getThrowLoc() const { return ThrowLoc; } 537 void setThrowLoc(SourceLocation L) { ThrowLoc = L; } 538 539 virtual SourceRange getSourceRange() const { 540 if (getSubExpr() == 0) 541 return SourceRange(ThrowLoc, ThrowLoc); 542 return SourceRange(ThrowLoc, getSubExpr()->getSourceRange().getEnd()); 543 } 544 545 static bool classof(const Stmt *T) { 546 return T->getStmtClass() == CXXThrowExprClass; 547 } 548 static bool classof(const CXXThrowExpr *) { return true; } 549 550 // Iterators 551 virtual child_iterator child_begin(); 552 virtual child_iterator child_end(); 553}; 554 555/// CXXDefaultArgExpr - C++ [dcl.fct.default]. This wraps up a 556/// function call argument that was created from the corresponding 557/// parameter's default argument, when the call did not explicitly 558/// supply arguments for all of the parameters. 559class CXXDefaultArgExpr : public Expr { 560 /// \brief The parameter whose default is being used. 561 /// 562 /// When the bit is set, the subexpression is stored after the 563 /// CXXDefaultArgExpr itself. When the bit is clear, the parameter's 564 /// actual default expression is the subexpression. 565 llvm::PointerIntPair<ParmVarDecl *, 1, bool> Param; 566 567 /// \brief The location where the default argument expression was used. 568 SourceLocation Loc; 569 570 CXXDefaultArgExpr(StmtClass SC, SourceLocation Loc, ParmVarDecl *param) 571 : Expr(SC, 572 param->hasUnparsedDefaultArg() 573 ? param->getType().getNonReferenceType() 574 : param->getDefaultArg()->getType(), 575 false, false), 576 Param(param, false), Loc(Loc) { } 577 578 CXXDefaultArgExpr(StmtClass SC, SourceLocation Loc, ParmVarDecl *param, 579 Expr *SubExpr) 580 : Expr(SC, SubExpr->getType(), false, false), Param(param, true), Loc(Loc) { 581 *reinterpret_cast<Expr **>(this + 1) = SubExpr; 582 } 583 584public: 585 CXXDefaultArgExpr(EmptyShell Empty) : Expr(CXXDefaultArgExprClass, Empty) {} 586 587 588 // Param is the parameter whose default argument is used by this 589 // expression. 590 static CXXDefaultArgExpr *Create(ASTContext &C, SourceLocation Loc, 591 ParmVarDecl *Param) { 592 return new (C) CXXDefaultArgExpr(CXXDefaultArgExprClass, Loc, Param); 593 } 594 595 // Param is the parameter whose default argument is used by this 596 // expression, and SubExpr is the expression that will actually be used. 597 static CXXDefaultArgExpr *Create(ASTContext &C, 598 SourceLocation Loc, 599 ParmVarDecl *Param, 600 Expr *SubExpr); 601 602 // Retrieve the parameter that the argument was created from. 603 const ParmVarDecl *getParam() const { return Param.getPointer(); } 604 ParmVarDecl *getParam() { return Param.getPointer(); } 605 606 // Retrieve the actual argument to the function call. 607 const Expr *getExpr() const { 608 if (Param.getInt()) 609 return *reinterpret_cast<Expr const * const*> (this + 1); 610 return getParam()->getDefaultArg(); 611 } 612 Expr *getExpr() { 613 if (Param.getInt()) 614 return *reinterpret_cast<Expr **> (this + 1); 615 return getParam()->getDefaultArg(); 616 } 617 618 /// \brief Retrieve the location where this default argument was actually 619 /// used. 620 SourceLocation getUsedLocation() const { return Loc; } 621 622 virtual SourceRange getSourceRange() const { 623 // Default argument expressions have no representation in the 624 // source, so they have an empty source range. 625 return SourceRange(); 626 } 627 628 static bool classof(const Stmt *T) { 629 return T->getStmtClass() == CXXDefaultArgExprClass; 630 } 631 static bool classof(const CXXDefaultArgExpr *) { return true; } 632 633 // Iterators 634 virtual child_iterator child_begin(); 635 virtual child_iterator child_end(); 636 637 friend class ASTStmtReader; 638 friend class ASTStmtWriter; 639}; 640 641/// CXXTemporary - Represents a C++ temporary. 642class CXXTemporary { 643 /// Destructor - The destructor that needs to be called. 644 const CXXDestructorDecl *Destructor; 645 646 CXXTemporary(const CXXDestructorDecl *destructor) 647 : Destructor(destructor) { } 648 649public: 650 static CXXTemporary *Create(ASTContext &C, 651 const CXXDestructorDecl *Destructor); 652 653 const CXXDestructorDecl *getDestructor() const { return Destructor; } 654}; 655 656/// \brief Represents binding an expression to a temporary. 657/// 658/// This ensures the destructor is called for the temporary. It should only be 659/// needed for non-POD, non-trivially destructable class types. For example: 660/// 661/// \code 662/// struct S { 663/// S() { } // User defined constructor makes S non-POD. 664/// ~S() { } // User defined destructor makes it non-trivial. 665/// }; 666/// void test() { 667/// const S &s_ref = S(); // Requires a CXXBindTemporaryExpr. 668/// } 669/// \endcode 670class CXXBindTemporaryExpr : public Expr { 671 CXXTemporary *Temp; 672 673 Stmt *SubExpr; 674 675 CXXBindTemporaryExpr(CXXTemporary *temp, Expr* subexpr, 676 bool TD=false, bool VD=false) 677 : Expr(CXXBindTemporaryExprClass, subexpr->getType(), TD, VD), 678 Temp(temp), SubExpr(subexpr) { } 679 680public: 681 CXXBindTemporaryExpr(EmptyShell Empty) 682 : Expr(CXXBindTemporaryExprClass, Empty), Temp(0), SubExpr(0) {} 683 684 static CXXBindTemporaryExpr *Create(ASTContext &C, CXXTemporary *Temp, 685 Expr* SubExpr); 686 687 CXXTemporary *getTemporary() { return Temp; } 688 const CXXTemporary *getTemporary() const { return Temp; } 689 void setTemporary(CXXTemporary *T) { Temp = T; } 690 691 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 692 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 693 void setSubExpr(Expr *E) { SubExpr = E; } 694 695 virtual SourceRange getSourceRange() const { 696 return SubExpr->getSourceRange(); 697 } 698 699 // Implement isa/cast/dyncast/etc. 700 static bool classof(const Stmt *T) { 701 return T->getStmtClass() == CXXBindTemporaryExprClass; 702 } 703 static bool classof(const CXXBindTemporaryExpr *) { return true; } 704 705 // Iterators 706 virtual child_iterator child_begin(); 707 virtual child_iterator child_end(); 708}; 709 710/// CXXConstructExpr - Represents a call to a C++ constructor. 711class CXXConstructExpr : public Expr { 712public: 713 enum ConstructionKind { 714 CK_Complete, 715 CK_NonVirtualBase, 716 CK_VirtualBase 717 }; 718 719private: 720 CXXConstructorDecl *Constructor; 721 722 SourceLocation Loc; 723 SourceRange ParenRange; 724 bool Elidable : 1; 725 bool ZeroInitialization : 1; 726 unsigned ConstructKind : 2; 727 Stmt **Args; 728 unsigned NumArgs; 729 730protected: 731 CXXConstructExpr(ASTContext &C, StmtClass SC, QualType T, 732 SourceLocation Loc, 733 CXXConstructorDecl *d, bool elidable, 734 Expr **args, unsigned numargs, 735 bool ZeroInitialization = false, 736 ConstructionKind ConstructKind = CK_Complete, 737 SourceRange ParenRange = SourceRange()); 738 739 /// \brief Construct an empty C++ construction expression. 740 CXXConstructExpr(StmtClass SC, EmptyShell Empty) 741 : Expr(SC, Empty), Constructor(0), Elidable(0), ZeroInitialization(0), 742 ConstructKind(0), Args(0), NumArgs(0) { } 743 744public: 745 /// \brief Construct an empty C++ construction expression. 746 explicit CXXConstructExpr(EmptyShell Empty) 747 : Expr(CXXConstructExprClass, Empty), Constructor(0), 748 Elidable(0), ZeroInitialization(0), 749 ConstructKind(0), Args(0), NumArgs(0) { } 750 751 static CXXConstructExpr *Create(ASTContext &C, QualType T, 752 SourceLocation Loc, 753 CXXConstructorDecl *D, bool Elidable, 754 Expr **Args, unsigned NumArgs, 755 bool ZeroInitialization = false, 756 ConstructionKind ConstructKind = CK_Complete, 757 SourceRange ParenRange = SourceRange()); 758 759 760 CXXConstructorDecl* getConstructor() const { return Constructor; } 761 void setConstructor(CXXConstructorDecl *C) { Constructor = C; } 762 763 SourceLocation getLocation() const { return Loc; } 764 void setLocation(SourceLocation Loc) { this->Loc = Loc; } 765 766 /// \brief Whether this construction is elidable. 767 bool isElidable() const { return Elidable; } 768 void setElidable(bool E) { Elidable = E; } 769 770 /// \brief Whether this construction first requires 771 /// zero-initialization before the initializer is called. 772 bool requiresZeroInitialization() const { return ZeroInitialization; } 773 void setRequiresZeroInitialization(bool ZeroInit) { 774 ZeroInitialization = ZeroInit; 775 } 776 777 /// \brief Determines whether this constructor is actually constructing 778 /// a base class (rather than a complete object). 779 ConstructionKind getConstructionKind() const { 780 return (ConstructionKind)ConstructKind; 781 } 782 void setConstructionKind(ConstructionKind CK) { 783 ConstructKind = CK; 784 } 785 786 typedef ExprIterator arg_iterator; 787 typedef ConstExprIterator const_arg_iterator; 788 789 arg_iterator arg_begin() { return Args; } 790 arg_iterator arg_end() { return Args + NumArgs; } 791 const_arg_iterator arg_begin() const { return Args; } 792 const_arg_iterator arg_end() const { return Args + NumArgs; } 793 794 Expr **getArgs() const { return reinterpret_cast<Expr **>(Args); } 795 unsigned getNumArgs() const { return NumArgs; } 796 797 /// getArg - Return the specified argument. 798 Expr *getArg(unsigned Arg) { 799 assert(Arg < NumArgs && "Arg access out of range!"); 800 return cast<Expr>(Args[Arg]); 801 } 802 const Expr *getArg(unsigned Arg) const { 803 assert(Arg < NumArgs && "Arg access out of range!"); 804 return cast<Expr>(Args[Arg]); 805 } 806 807 /// setArg - Set the specified argument. 808 void setArg(unsigned Arg, Expr *ArgExpr) { 809 assert(Arg < NumArgs && "Arg access out of range!"); 810 Args[Arg] = ArgExpr; 811 } 812 813 virtual SourceRange getSourceRange() const; 814 SourceRange getParenRange() const { return ParenRange; } 815 816 static bool classof(const Stmt *T) { 817 return T->getStmtClass() == CXXConstructExprClass || 818 T->getStmtClass() == CXXTemporaryObjectExprClass; 819 } 820 static bool classof(const CXXConstructExpr *) { return true; } 821 822 // Iterators 823 virtual child_iterator child_begin(); 824 virtual child_iterator child_end(); 825 826 friend class ASTStmtReader; 827}; 828 829/// CXXFunctionalCastExpr - Represents an explicit C++ type conversion 830/// that uses "functional" notion (C++ [expr.type.conv]). Example: @c 831/// x = int(0.5); 832class CXXFunctionalCastExpr : public ExplicitCastExpr { 833 SourceLocation TyBeginLoc; 834 SourceLocation RParenLoc; 835 836 CXXFunctionalCastExpr(QualType ty, TypeSourceInfo *writtenTy, 837 SourceLocation tyBeginLoc, CastKind kind, 838 Expr *castExpr, unsigned pathSize, 839 SourceLocation rParenLoc) 840 : ExplicitCastExpr(CXXFunctionalCastExprClass, ty, kind, castExpr, 841 pathSize, writtenTy), 842 TyBeginLoc(tyBeginLoc), RParenLoc(rParenLoc) {} 843 844 explicit CXXFunctionalCastExpr(EmptyShell Shell, unsigned PathSize) 845 : ExplicitCastExpr(CXXFunctionalCastExprClass, Shell, PathSize) { } 846 847public: 848 static CXXFunctionalCastExpr *Create(ASTContext &Context, QualType T, 849 TypeSourceInfo *Written, 850 SourceLocation TyBeginLoc, 851 CastKind Kind, Expr *Op, 852 const CXXCastPath *Path, 853 SourceLocation RPLoc); 854 static CXXFunctionalCastExpr *CreateEmpty(ASTContext &Context, 855 unsigned PathSize); 856 857 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 858 void setTypeBeginLoc(SourceLocation L) { TyBeginLoc = L; } 859 SourceLocation getRParenLoc() const { return RParenLoc; } 860 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 861 862 virtual SourceRange getSourceRange() const { 863 return SourceRange(TyBeginLoc, RParenLoc); 864 } 865 static bool classof(const Stmt *T) { 866 return T->getStmtClass() == CXXFunctionalCastExprClass; 867 } 868 static bool classof(const CXXFunctionalCastExpr *) { return true; } 869}; 870 871/// @brief Represents a C++ functional cast expression that builds a 872/// temporary object. 873/// 874/// This expression type represents a C++ "functional" cast 875/// (C++[expr.type.conv]) with N != 1 arguments that invokes a 876/// constructor to build a temporary object. With N == 1 arguments the 877/// functional cast expression will be represented by CXXFunctionalCastExpr. 878/// Example: 879/// @code 880/// struct X { X(int, float); } 881/// 882/// X create_X() { 883/// return X(1, 3.14f); // creates a CXXTemporaryObjectExpr 884/// }; 885/// @endcode 886class CXXTemporaryObjectExpr : public CXXConstructExpr { 887 TypeSourceInfo *Type; 888 889public: 890 CXXTemporaryObjectExpr(ASTContext &C, CXXConstructorDecl *Cons, 891 TypeSourceInfo *Type, 892 Expr **Args,unsigned NumArgs, 893 SourceRange parenRange, 894 bool ZeroInitialization = false); 895 explicit CXXTemporaryObjectExpr(EmptyShell Empty) 896 : CXXConstructExpr(CXXTemporaryObjectExprClass, Empty), Type() { } 897 898 TypeSourceInfo *getTypeSourceInfo() const { return Type; } 899 900 virtual SourceRange getSourceRange() const; 901 902 static bool classof(const Stmt *T) { 903 return T->getStmtClass() == CXXTemporaryObjectExprClass; 904 } 905 static bool classof(const CXXTemporaryObjectExpr *) { return true; } 906 907 friend class ASTStmtReader; 908}; 909 910/// CXXScalarValueInitExpr - [C++ 5.2.3p2] 911/// Expression "T()" which creates a value-initialized rvalue of type 912/// T, which is a non-class type. 913/// 914class CXXScalarValueInitExpr : public Expr { 915 SourceLocation RParenLoc; 916 TypeSourceInfo *TypeInfo; 917 918 friend class ASTStmtReader; 919 920public: 921 /// \brief Create an explicitly-written scalar-value initialization 922 /// expression. 923 CXXScalarValueInitExpr(QualType Type, 924 TypeSourceInfo *TypeInfo, 925 SourceLocation rParenLoc ) : 926 Expr(CXXScalarValueInitExprClass, Type, false, false), 927 RParenLoc(rParenLoc), TypeInfo(TypeInfo) {} 928 929 explicit CXXScalarValueInitExpr(EmptyShell Shell) 930 : Expr(CXXScalarValueInitExprClass, Shell) { } 931 932 TypeSourceInfo *getTypeSourceInfo() const { 933 return TypeInfo; 934 } 935 936 SourceLocation getRParenLoc() const { return RParenLoc; } 937 938 virtual SourceRange getSourceRange() const; 939 940 static bool classof(const Stmt *T) { 941 return T->getStmtClass() == CXXScalarValueInitExprClass; 942 } 943 static bool classof(const CXXScalarValueInitExpr *) { return true; } 944 945 // Iterators 946 virtual child_iterator child_begin(); 947 virtual child_iterator child_end(); 948}; 949 950/// CXXNewExpr - A new expression for memory allocation and constructor calls, 951/// e.g: "new CXXNewExpr(foo)". 952class CXXNewExpr : public Expr { 953 // Was the usage ::new, i.e. is the global new to be used? 954 bool GlobalNew : 1; 955 // Is there an initializer? If not, built-ins are uninitialized, else they're 956 // value-initialized. 957 bool Initializer : 1; 958 // Do we allocate an array? If so, the first SubExpr is the size expression. 959 bool Array : 1; 960 // The number of placement new arguments. 961 unsigned NumPlacementArgs : 15; 962 // The number of constructor arguments. This may be 1 even for non-class 963 // types; use the pseudo copy constructor. 964 unsigned NumConstructorArgs : 14; 965 // Contains an optional array size expression, any number of optional 966 // placement arguments, and any number of optional constructor arguments, 967 // in that order. 968 Stmt **SubExprs; 969 // Points to the allocation function used. 970 FunctionDecl *OperatorNew; 971 // Points to the deallocation function used in case of error. May be null. 972 FunctionDecl *OperatorDelete; 973 // Points to the constructor used. Cannot be null if AllocType is a record; 974 // it would still point at the default constructor (even an implicit one). 975 // Must be null for all other types. 976 CXXConstructorDecl *Constructor; 977 978 /// \brief The allocated type-source information, as written in the source. 979 TypeSourceInfo *AllocatedTypeInfo; 980 981 /// \brief If the allocated type was expressed as a parenthesized type-id, 982 /// the source range covering the parenthesized type-id. 983 SourceRange TypeIdParens; 984 985 SourceLocation StartLoc; 986 SourceLocation EndLoc; 987 SourceLocation ConstructorLParen; 988 SourceLocation ConstructorRParen; 989 990 friend class ASTStmtReader; 991public: 992 CXXNewExpr(ASTContext &C, bool globalNew, FunctionDecl *operatorNew, 993 Expr **placementArgs, unsigned numPlaceArgs, 994 SourceRange TypeIdParens, 995 Expr *arraySize, CXXConstructorDecl *constructor, bool initializer, 996 Expr **constructorArgs, unsigned numConsArgs, 997 FunctionDecl *operatorDelete, QualType ty, 998 TypeSourceInfo *AllocatedTypeInfo, 999 SourceLocation startLoc, SourceLocation endLoc, 1000 SourceLocation constructorLParen, 1001 SourceLocation constructorRParen); 1002 explicit CXXNewExpr(EmptyShell Shell) 1003 : Expr(CXXNewExprClass, Shell), SubExprs(0) { } 1004 1005 void AllocateArgsArray(ASTContext &C, bool isArray, unsigned numPlaceArgs, 1006 unsigned numConsArgs); 1007 1008 QualType getAllocatedType() const { 1009 assert(getType()->isPointerType()); 1010 return getType()->getAs<PointerType>()->getPointeeType(); 1011 } 1012 1013 TypeSourceInfo *getAllocatedTypeSourceInfo() const { 1014 return AllocatedTypeInfo; 1015 } 1016 1017 FunctionDecl *getOperatorNew() const { return OperatorNew; } 1018 void setOperatorNew(FunctionDecl *D) { OperatorNew = D; } 1019 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 1020 void setOperatorDelete(FunctionDecl *D) { OperatorDelete = D; } 1021 CXXConstructorDecl *getConstructor() const { return Constructor; } 1022 void setConstructor(CXXConstructorDecl *D) { Constructor = D; } 1023 1024 bool isArray() const { return Array; } 1025 Expr *getArraySize() { 1026 return Array ? cast<Expr>(SubExprs[0]) : 0; 1027 } 1028 const Expr *getArraySize() const { 1029 return Array ? cast<Expr>(SubExprs[0]) : 0; 1030 } 1031 1032 unsigned getNumPlacementArgs() const { return NumPlacementArgs; } 1033 Expr *getPlacementArg(unsigned i) { 1034 assert(i < NumPlacementArgs && "Index out of range"); 1035 return cast<Expr>(SubExprs[Array + i]); 1036 } 1037 const Expr *getPlacementArg(unsigned i) const { 1038 assert(i < NumPlacementArgs && "Index out of range"); 1039 return cast<Expr>(SubExprs[Array + i]); 1040 } 1041 1042 bool isParenTypeId() const { return TypeIdParens.isValid(); } 1043 SourceRange getTypeIdParens() const { return TypeIdParens; } 1044 1045 bool isGlobalNew() const { return GlobalNew; } 1046 void setGlobalNew(bool V) { GlobalNew = V; } 1047 bool hasInitializer() const { return Initializer; } 1048 void setHasInitializer(bool V) { Initializer = V; } 1049 1050 unsigned getNumConstructorArgs() const { return NumConstructorArgs; } 1051 Expr *getConstructorArg(unsigned i) { 1052 assert(i < NumConstructorArgs && "Index out of range"); 1053 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 1054 } 1055 const Expr *getConstructorArg(unsigned i) const { 1056 assert(i < NumConstructorArgs && "Index out of range"); 1057 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 1058 } 1059 1060 typedef ExprIterator arg_iterator; 1061 typedef ConstExprIterator const_arg_iterator; 1062 1063 arg_iterator placement_arg_begin() { 1064 return SubExprs + Array; 1065 } 1066 arg_iterator placement_arg_end() { 1067 return SubExprs + Array + getNumPlacementArgs(); 1068 } 1069 const_arg_iterator placement_arg_begin() const { 1070 return SubExprs + Array; 1071 } 1072 const_arg_iterator placement_arg_end() const { 1073 return SubExprs + Array + getNumPlacementArgs(); 1074 } 1075 1076 arg_iterator constructor_arg_begin() { 1077 return SubExprs + Array + getNumPlacementArgs(); 1078 } 1079 arg_iterator constructor_arg_end() { 1080 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 1081 } 1082 const_arg_iterator constructor_arg_begin() const { 1083 return SubExprs + Array + getNumPlacementArgs(); 1084 } 1085 const_arg_iterator constructor_arg_end() const { 1086 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 1087 } 1088 1089 typedef Stmt **raw_arg_iterator; 1090 raw_arg_iterator raw_arg_begin() { return SubExprs; } 1091 raw_arg_iterator raw_arg_end() { 1092 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 1093 } 1094 const_arg_iterator raw_arg_begin() const { return SubExprs; } 1095 const_arg_iterator raw_arg_end() const { return constructor_arg_end(); } 1096 1097 SourceLocation getStartLoc() const { return StartLoc; } 1098 SourceLocation getEndLoc() const { return EndLoc; } 1099 1100 SourceLocation getConstructorLParen() const { return ConstructorLParen; } 1101 SourceLocation getConstructorRParen() const { return ConstructorRParen; } 1102 1103 virtual SourceRange getSourceRange() const { 1104 return SourceRange(StartLoc, EndLoc); 1105 } 1106 1107 static bool classof(const Stmt *T) { 1108 return T->getStmtClass() == CXXNewExprClass; 1109 } 1110 static bool classof(const CXXNewExpr *) { return true; } 1111 1112 // Iterators 1113 virtual child_iterator child_begin(); 1114 virtual child_iterator child_end(); 1115}; 1116 1117/// CXXDeleteExpr - A delete expression for memory deallocation and destructor 1118/// calls, e.g. "delete[] pArray". 1119class CXXDeleteExpr : public Expr { 1120 // Is this a forced global delete, i.e. "::delete"? 1121 bool GlobalDelete : 1; 1122 // Is this the array form of delete, i.e. "delete[]"? 1123 bool ArrayForm : 1; 1124 // ArrayFormAsWritten can be different from ArrayForm if 'delete' is applied 1125 // to pointer-to-array type (ArrayFormAsWritten will be false while ArrayForm 1126 // will be true). 1127 bool ArrayFormAsWritten : 1; 1128 // Points to the operator delete overload that is used. Could be a member. 1129 FunctionDecl *OperatorDelete; 1130 // The pointer expression to be deleted. 1131 Stmt *Argument; 1132 // Location of the expression. 1133 SourceLocation Loc; 1134public: 1135 CXXDeleteExpr(QualType ty, bool globalDelete, bool arrayForm, 1136 bool arrayFormAsWritten, FunctionDecl *operatorDelete, 1137 Expr *arg, SourceLocation loc) 1138 : Expr(CXXDeleteExprClass, ty, false, false), GlobalDelete(globalDelete), 1139 ArrayForm(arrayForm), ArrayFormAsWritten(arrayFormAsWritten), 1140 OperatorDelete(operatorDelete), Argument(arg), Loc(loc) { } 1141 explicit CXXDeleteExpr(EmptyShell Shell) 1142 : Expr(CXXDeleteExprClass, Shell), OperatorDelete(0), Argument(0) { } 1143 1144 bool isGlobalDelete() const { return GlobalDelete; } 1145 bool isArrayForm() const { return ArrayForm; } 1146 bool isArrayFormAsWritten() const { return ArrayFormAsWritten; } 1147 1148 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 1149 1150 Expr *getArgument() { return cast<Expr>(Argument); } 1151 const Expr *getArgument() const { return cast<Expr>(Argument); } 1152 1153 QualType getDestroyedType() const; 1154 1155 virtual SourceRange getSourceRange() const { 1156 return SourceRange(Loc, Argument->getLocEnd()); 1157 } 1158 1159 static bool classof(const Stmt *T) { 1160 return T->getStmtClass() == CXXDeleteExprClass; 1161 } 1162 static bool classof(const CXXDeleteExpr *) { return true; } 1163 1164 // Iterators 1165 virtual child_iterator child_begin(); 1166 virtual child_iterator child_end(); 1167 1168 friend class ASTStmtReader; 1169}; 1170 1171/// \brief Structure used to store the type being destroyed by a 1172/// pseudo-destructor expression. 1173class PseudoDestructorTypeStorage { 1174 /// \brief Either the type source information or the name of the type, if 1175 /// it couldn't be resolved due to type-dependence. 1176 llvm::PointerUnion<TypeSourceInfo *, IdentifierInfo *> Type; 1177 1178 /// \brief The starting source location of the pseudo-destructor type. 1179 SourceLocation Location; 1180 1181public: 1182 PseudoDestructorTypeStorage() { } 1183 1184 PseudoDestructorTypeStorage(IdentifierInfo *II, SourceLocation Loc) 1185 : Type(II), Location(Loc) { } 1186 1187 PseudoDestructorTypeStorage(TypeSourceInfo *Info); 1188 1189 TypeSourceInfo *getTypeSourceInfo() const { 1190 return Type.dyn_cast<TypeSourceInfo *>(); 1191 } 1192 1193 IdentifierInfo *getIdentifier() const { 1194 return Type.dyn_cast<IdentifierInfo *>(); 1195 } 1196 1197 SourceLocation getLocation() const { return Location; } 1198}; 1199 1200/// \brief Represents a C++ pseudo-destructor (C++ [expr.pseudo]). 1201/// 1202/// A pseudo-destructor is an expression that looks like a member access to a 1203/// destructor of a scalar type, except that scalar types don't have 1204/// destructors. For example: 1205/// 1206/// \code 1207/// typedef int T; 1208/// void f(int *p) { 1209/// p->T::~T(); 1210/// } 1211/// \endcode 1212/// 1213/// Pseudo-destructors typically occur when instantiating templates such as: 1214/// 1215/// \code 1216/// template<typename T> 1217/// void destroy(T* ptr) { 1218/// ptr->T::~T(); 1219/// } 1220/// \endcode 1221/// 1222/// for scalar types. A pseudo-destructor expression has no run-time semantics 1223/// beyond evaluating the base expression. 1224class CXXPseudoDestructorExpr : public Expr { 1225 /// \brief The base expression (that is being destroyed). 1226 Stmt *Base; 1227 1228 /// \brief Whether the operator was an arrow ('->'); otherwise, it was a 1229 /// period ('.'). 1230 bool IsArrow : 1; 1231 1232 /// \brief The location of the '.' or '->' operator. 1233 SourceLocation OperatorLoc; 1234 1235 /// \brief The nested-name-specifier that follows the operator, if present. 1236 NestedNameSpecifier *Qualifier; 1237 1238 /// \brief The source range that covers the nested-name-specifier, if 1239 /// present. 1240 SourceRange QualifierRange; 1241 1242 /// \brief The type that precedes the '::' in a qualified pseudo-destructor 1243 /// expression. 1244 TypeSourceInfo *ScopeType; 1245 1246 /// \brief The location of the '::' in a qualified pseudo-destructor 1247 /// expression. 1248 SourceLocation ColonColonLoc; 1249 1250 /// \brief The location of the '~'. 1251 SourceLocation TildeLoc; 1252 1253 /// \brief The type being destroyed, or its name if we were unable to 1254 /// resolve the name. 1255 PseudoDestructorTypeStorage DestroyedType; 1256 1257public: 1258 CXXPseudoDestructorExpr(ASTContext &Context, 1259 Expr *Base, bool isArrow, SourceLocation OperatorLoc, 1260 NestedNameSpecifier *Qualifier, 1261 SourceRange QualifierRange, 1262 TypeSourceInfo *ScopeType, 1263 SourceLocation ColonColonLoc, 1264 SourceLocation TildeLoc, 1265 PseudoDestructorTypeStorage DestroyedType) 1266 : Expr(CXXPseudoDestructorExprClass, 1267 Context.getPointerType(Context.getFunctionType(Context.VoidTy, 0, 0, 1268 false, 0, false, 1269 false, 0, 0, 1270 FunctionType::ExtInfo())), 1271 /*isTypeDependent=*/(Base->isTypeDependent() || 1272 (DestroyedType.getTypeSourceInfo() && 1273 DestroyedType.getTypeSourceInfo()->getType()->isDependentType())), 1274 /*isValueDependent=*/Base->isValueDependent()), 1275 Base(static_cast<Stmt *>(Base)), IsArrow(isArrow), 1276 OperatorLoc(OperatorLoc), Qualifier(Qualifier), 1277 QualifierRange(QualifierRange), 1278 ScopeType(ScopeType), ColonColonLoc(ColonColonLoc), TildeLoc(TildeLoc), 1279 DestroyedType(DestroyedType) { } 1280 1281 explicit CXXPseudoDestructorExpr(EmptyShell Shell) 1282 : Expr(CXXPseudoDestructorExprClass, Shell), 1283 Base(0), IsArrow(false), Qualifier(0), ScopeType(0) { } 1284 1285 void setBase(Expr *E) { Base = E; } 1286 Expr *getBase() const { return cast<Expr>(Base); } 1287 1288 /// \brief Determines whether this member expression actually had 1289 /// a C++ nested-name-specifier prior to the name of the member, e.g., 1290 /// x->Base::foo. 1291 bool hasQualifier() const { return Qualifier != 0; } 1292 1293 /// \brief If the member name was qualified, retrieves the source range of 1294 /// the nested-name-specifier that precedes the member name. Otherwise, 1295 /// returns an empty source range. 1296 SourceRange getQualifierRange() const { return QualifierRange; } 1297 void setQualifierRange(SourceRange R) { QualifierRange = R; } 1298 1299 /// \brief If the member name was qualified, retrieves the 1300 /// nested-name-specifier that precedes the member name. Otherwise, returns 1301 /// NULL. 1302 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1303 void setQualifier(NestedNameSpecifier *NNS) { Qualifier = NNS; } 1304 1305 /// \brief Determine whether this pseudo-destructor expression was written 1306 /// using an '->' (otherwise, it used a '.'). 1307 bool isArrow() const { return IsArrow; } 1308 void setArrow(bool A) { IsArrow = A; } 1309 1310 /// \brief Retrieve the location of the '.' or '->' operator. 1311 SourceLocation getOperatorLoc() const { return OperatorLoc; } 1312 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 1313 1314 /// \brief Retrieve the scope type in a qualified pseudo-destructor 1315 /// expression. 1316 /// 1317 /// Pseudo-destructor expressions can have extra qualification within them 1318 /// that is not part of the nested-name-specifier, e.g., \c p->T::~T(). 1319 /// Here, if the object type of the expression is (or may be) a scalar type, 1320 /// \p T may also be a scalar type and, therefore, cannot be part of a 1321 /// nested-name-specifier. It is stored as the "scope type" of the pseudo- 1322 /// destructor expression. 1323 TypeSourceInfo *getScopeTypeInfo() const { return ScopeType; } 1324 void setScopeTypeInfo(TypeSourceInfo *Info) { ScopeType = Info; } 1325 1326 /// \brief Retrieve the location of the '::' in a qualified pseudo-destructor 1327 /// expression. 1328 SourceLocation getColonColonLoc() const { return ColonColonLoc; } 1329 void setColonColonLoc(SourceLocation L) { ColonColonLoc = L; } 1330 1331 /// \brief Retrieve the location of the '~'. 1332 SourceLocation getTildeLoc() const { return TildeLoc; } 1333 void setTildeLoc(SourceLocation L) { TildeLoc = L; } 1334 1335 /// \brief Retrieve the source location information for the type 1336 /// being destroyed. 1337 /// 1338 /// This type-source information is available for non-dependent 1339 /// pseudo-destructor expressions and some dependent pseudo-destructor 1340 /// expressions. Returns NULL if we only have the identifier for a 1341 /// dependent pseudo-destructor expression. 1342 TypeSourceInfo *getDestroyedTypeInfo() const { 1343 return DestroyedType.getTypeSourceInfo(); 1344 } 1345 1346 /// \brief In a dependent pseudo-destructor expression for which we do not 1347 /// have full type information on the destroyed type, provides the name 1348 /// of the destroyed type. 1349 IdentifierInfo *getDestroyedTypeIdentifier() const { 1350 return DestroyedType.getIdentifier(); 1351 } 1352 1353 /// \brief Retrieve the type being destroyed. 1354 QualType getDestroyedType() const; 1355 1356 /// \brief Retrieve the starting location of the type being destroyed. 1357 SourceLocation getDestroyedTypeLoc() const { 1358 return DestroyedType.getLocation(); 1359 } 1360 1361 /// \brief Set the name of destroyed type for a dependent pseudo-destructor 1362 /// expression. 1363 void setDestroyedType(IdentifierInfo *II, SourceLocation Loc) { 1364 DestroyedType = PseudoDestructorTypeStorage(II, Loc); 1365 } 1366 1367 /// \brief Set the destroyed type. 1368 void setDestroyedType(TypeSourceInfo *Info) { 1369 DestroyedType = PseudoDestructorTypeStorage(Info); 1370 } 1371 1372 virtual SourceRange getSourceRange() const; 1373 1374 static bool classof(const Stmt *T) { 1375 return T->getStmtClass() == CXXPseudoDestructorExprClass; 1376 } 1377 static bool classof(const CXXPseudoDestructorExpr *) { return true; } 1378 1379 // Iterators 1380 virtual child_iterator child_begin(); 1381 virtual child_iterator child_end(); 1382}; 1383 1384/// UnaryTypeTraitExpr - A GCC or MS unary type trait, as used in the 1385/// implementation of TR1/C++0x type trait templates. 1386/// Example: 1387/// __is_pod(int) == true 1388/// __is_enum(std::string) == false 1389class UnaryTypeTraitExpr : public Expr { 1390 /// UTT - The trait. A UnaryTypeTrait enum in MSVC compat unsigned. 1391 unsigned UTT : 31; 1392 /// The value of the type trait. Unspecified if dependent. 1393 bool Value : 1; 1394 1395 /// Loc - The location of the type trait keyword. 1396 SourceLocation Loc; 1397 1398 /// RParen - The location of the closing paren. 1399 SourceLocation RParen; 1400 1401 /// The type being queried. 1402 TypeSourceInfo *QueriedType; 1403 1404public: 1405 UnaryTypeTraitExpr(SourceLocation loc, UnaryTypeTrait utt, 1406 TypeSourceInfo *queried, bool value, 1407 SourceLocation rparen, QualType ty) 1408 : Expr(UnaryTypeTraitExprClass, ty, false, 1409 queried->getType()->isDependentType()), 1410 UTT(utt), Value(value), Loc(loc), RParen(rparen), QueriedType(queried) { } 1411 1412 explicit UnaryTypeTraitExpr(EmptyShell Empty) 1413 : Expr(UnaryTypeTraitExprClass, Empty), UTT(0), Value(false), 1414 QueriedType() { } 1415 1416 virtual SourceRange getSourceRange() const { return SourceRange(Loc, RParen);} 1417 1418 UnaryTypeTrait getTrait() const { return static_cast<UnaryTypeTrait>(UTT); } 1419 1420 QualType getQueriedType() const { return QueriedType->getType(); } 1421 1422 TypeSourceInfo *getQueriedTypeSourceInfo() const { return QueriedType; } 1423 1424 bool getValue() const { return Value; } 1425 1426 static bool classof(const Stmt *T) { 1427 return T->getStmtClass() == UnaryTypeTraitExprClass; 1428 } 1429 static bool classof(const UnaryTypeTraitExpr *) { return true; } 1430 1431 // Iterators 1432 virtual child_iterator child_begin(); 1433 virtual child_iterator child_end(); 1434 1435 friend class ASTStmtReader; 1436}; 1437 1438/// \brief A reference to an overloaded function set, either an 1439/// \t UnresolvedLookupExpr or an \t UnresolvedMemberExpr. 1440class OverloadExpr : public Expr { 1441 /// The results. These are undesugared, which is to say, they may 1442 /// include UsingShadowDecls. Access is relative to the naming 1443 /// class. 1444 // FIXME: Allocate this data after the OverloadExpr subclass. 1445 DeclAccessPair *Results; 1446 unsigned NumResults; 1447 1448 /// The common name of these declarations. 1449 DeclarationNameInfo NameInfo; 1450 1451 /// The scope specifier, if any. 1452 NestedNameSpecifier *Qualifier; 1453 1454 /// The source range of the scope specifier. 1455 SourceRange QualifierRange; 1456 1457protected: 1458 /// True if the name was a template-id. 1459 bool HasExplicitTemplateArgs; 1460 1461 OverloadExpr(StmtClass K, ASTContext &C, QualType T, bool Dependent, 1462 NestedNameSpecifier *Qualifier, SourceRange QRange, 1463 const DeclarationNameInfo &NameInfo, 1464 bool HasTemplateArgs, 1465 UnresolvedSetIterator Begin, UnresolvedSetIterator End); 1466 1467 OverloadExpr(StmtClass K, EmptyShell Empty) 1468 : Expr(K, Empty), Results(0), NumResults(0), 1469 Qualifier(0), HasExplicitTemplateArgs(false) { } 1470 1471public: 1472 /// Computes whether an unresolved lookup on the given declarations 1473 /// and optional template arguments is type- and value-dependent. 1474 static bool ComputeDependence(UnresolvedSetIterator Begin, 1475 UnresolvedSetIterator End, 1476 const TemplateArgumentListInfo *Args); 1477 1478 struct FindResult { 1479 OverloadExpr *Expression; 1480 bool IsAddressOfOperand; 1481 bool HasFormOfMemberPointer; 1482 }; 1483 1484 /// Finds the overloaded expression in the given expression of 1485 /// OverloadTy. 1486 /// 1487 /// \return the expression (which must be there) and true if it has 1488 /// the particular form of a member pointer expression 1489 static FindResult find(Expr *E) { 1490 assert(E->getType()->isSpecificBuiltinType(BuiltinType::Overload)); 1491 1492 FindResult Result; 1493 1494 E = E->IgnoreParens(); 1495 if (isa<UnaryOperator>(E)) { 1496 assert(cast<UnaryOperator>(E)->getOpcode() == UO_AddrOf); 1497 E = cast<UnaryOperator>(E)->getSubExpr(); 1498 OverloadExpr *Ovl = cast<OverloadExpr>(E->IgnoreParens()); 1499 1500 Result.HasFormOfMemberPointer = (E == Ovl && Ovl->getQualifier()); 1501 Result.IsAddressOfOperand = true; 1502 Result.Expression = Ovl; 1503 } else { 1504 Result.HasFormOfMemberPointer = false; 1505 Result.IsAddressOfOperand = false; 1506 Result.Expression = cast<OverloadExpr>(E); 1507 } 1508 1509 return Result; 1510 } 1511 1512 /// Gets the naming class of this lookup, if any. 1513 CXXRecordDecl *getNamingClass() const; 1514 1515 typedef UnresolvedSetImpl::iterator decls_iterator; 1516 decls_iterator decls_begin() const { return UnresolvedSetIterator(Results); } 1517 decls_iterator decls_end() const { 1518 return UnresolvedSetIterator(Results + NumResults); 1519 } 1520 1521 void initializeResults(ASTContext &C, 1522 UnresolvedSetIterator Begin,UnresolvedSetIterator End); 1523 1524 /// Gets the number of declarations in the unresolved set. 1525 unsigned getNumDecls() const { return NumResults; } 1526 1527 /// Gets the full name info. 1528 const DeclarationNameInfo &getNameInfo() const { return NameInfo; } 1529 void setNameInfo(const DeclarationNameInfo &N) { NameInfo = N; } 1530 1531 /// Gets the name looked up. 1532 DeclarationName getName() const { return NameInfo.getName(); } 1533 void setName(DeclarationName N) { NameInfo.setName(N); } 1534 1535 /// Gets the location of the name. 1536 SourceLocation getNameLoc() const { return NameInfo.getLoc(); } 1537 void setNameLoc(SourceLocation Loc) { NameInfo.setLoc(Loc); } 1538 1539 /// Fetches the nested-name qualifier, if one was given. 1540 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1541 void setQualifier(NestedNameSpecifier *NNS) { Qualifier = NNS; } 1542 1543 /// Fetches the range of the nested-name qualifier. 1544 SourceRange getQualifierRange() const { return QualifierRange; } 1545 void setQualifierRange(SourceRange R) { QualifierRange = R; } 1546 1547 /// \brief Determines whether this expression had an explicit 1548 /// template argument list, e.g. f<int>. 1549 bool hasExplicitTemplateArgs() const { return HasExplicitTemplateArgs; } 1550 1551 ExplicitTemplateArgumentList &getExplicitTemplateArgs(); // defined far below 1552 1553 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1554 return const_cast<OverloadExpr*>(this)->getExplicitTemplateArgs(); 1555 } 1556 1557 /// \brief Retrieves the optional explicit template arguments. 1558 /// This points to the same data as getExplicitTemplateArgs(), but 1559 /// returns null if there are no explicit template arguments. 1560 const ExplicitTemplateArgumentList *getOptionalExplicitTemplateArgs() { 1561 if (!hasExplicitTemplateArgs()) return 0; 1562 return &getExplicitTemplateArgs(); 1563 } 1564 1565 static bool classof(const Stmt *T) { 1566 return T->getStmtClass() == UnresolvedLookupExprClass || 1567 T->getStmtClass() == UnresolvedMemberExprClass; 1568 } 1569 static bool classof(const OverloadExpr *) { return true; } 1570 1571 friend class ASTStmtReader; 1572 friend class ASTStmtWriter; 1573}; 1574 1575/// \brief A reference to a name which we were able to look up during 1576/// parsing but could not resolve to a specific declaration. This 1577/// arises in several ways: 1578/// * we might be waiting for argument-dependent lookup 1579/// * the name might resolve to an overloaded function 1580/// and eventually: 1581/// * the lookup might have included a function template 1582/// These never include UnresolvedUsingValueDecls, which are always 1583/// class members and therefore appear only in 1584/// UnresolvedMemberLookupExprs. 1585class UnresolvedLookupExpr : public OverloadExpr { 1586 /// True if these lookup results should be extended by 1587 /// argument-dependent lookup if this is the operand of a function 1588 /// call. 1589 bool RequiresADL; 1590 1591 /// True if these lookup results are overloaded. This is pretty 1592 /// trivially rederivable if we urgently need to kill this field. 1593 bool Overloaded; 1594 1595 /// The naming class (C++ [class.access.base]p5) of the lookup, if 1596 /// any. This can generally be recalculated from the context chain, 1597 /// but that can be fairly expensive for unqualified lookups. If we 1598 /// want to improve memory use here, this could go in a union 1599 /// against the qualified-lookup bits. 1600 CXXRecordDecl *NamingClass; 1601 1602 UnresolvedLookupExpr(ASTContext &C, QualType T, bool Dependent, 1603 CXXRecordDecl *NamingClass, 1604 NestedNameSpecifier *Qualifier, SourceRange QRange, 1605 const DeclarationNameInfo &NameInfo, 1606 bool RequiresADL, bool Overloaded, bool HasTemplateArgs, 1607 UnresolvedSetIterator Begin, UnresolvedSetIterator End) 1608 : OverloadExpr(UnresolvedLookupExprClass, C, T, Dependent, Qualifier, 1609 QRange, NameInfo, HasTemplateArgs, Begin, End), 1610 RequiresADL(RequiresADL), Overloaded(Overloaded), NamingClass(NamingClass) 1611 {} 1612 1613 UnresolvedLookupExpr(EmptyShell Empty) 1614 : OverloadExpr(UnresolvedLookupExprClass, Empty), 1615 RequiresADL(false), Overloaded(false), NamingClass(0) 1616 {} 1617 1618public: 1619 static UnresolvedLookupExpr *Create(ASTContext &C, 1620 bool Dependent, 1621 CXXRecordDecl *NamingClass, 1622 NestedNameSpecifier *Qualifier, 1623 SourceRange QualifierRange, 1624 const DeclarationNameInfo &NameInfo, 1625 bool ADL, bool Overloaded, 1626 UnresolvedSetIterator Begin, 1627 UnresolvedSetIterator End) { 1628 return new(C) UnresolvedLookupExpr(C, 1629 Dependent ? C.DependentTy : C.OverloadTy, 1630 Dependent, NamingClass, 1631 Qualifier, QualifierRange, NameInfo, 1632 ADL, Overloaded, false, 1633 Begin, End); 1634 } 1635 1636 static UnresolvedLookupExpr *Create(ASTContext &C, 1637 bool Dependent, 1638 CXXRecordDecl *NamingClass, 1639 NestedNameSpecifier *Qualifier, 1640 SourceRange QualifierRange, 1641 const DeclarationNameInfo &NameInfo, 1642 bool ADL, 1643 const TemplateArgumentListInfo &Args, 1644 UnresolvedSetIterator Begin, 1645 UnresolvedSetIterator End); 1646 1647 static UnresolvedLookupExpr *CreateEmpty(ASTContext &C, 1648 unsigned NumTemplateArgs); 1649 1650 /// True if this declaration should be extended by 1651 /// argument-dependent lookup. 1652 bool requiresADL() const { return RequiresADL; } 1653 void setRequiresADL(bool V) { RequiresADL = V; } 1654 1655 /// True if this lookup is overloaded. 1656 bool isOverloaded() const { return Overloaded; } 1657 void setOverloaded(bool V) { Overloaded = V; } 1658 1659 /// Gets the 'naming class' (in the sense of C++0x 1660 /// [class.access.base]p5) of the lookup. This is the scope 1661 /// that was looked in to find these results. 1662 CXXRecordDecl *getNamingClass() const { return NamingClass; } 1663 void setNamingClass(CXXRecordDecl *D) { NamingClass = D; } 1664 1665 // Note that, inconsistently with the explicit-template-argument AST 1666 // nodes, users are *forbidden* from calling these methods on objects 1667 // without explicit template arguments. 1668 1669 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 1670 assert(hasExplicitTemplateArgs()); 1671 return *reinterpret_cast<ExplicitTemplateArgumentList*>(this + 1); 1672 } 1673 1674 /// Gets a reference to the explicit template argument list. 1675 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1676 assert(hasExplicitTemplateArgs()); 1677 return *reinterpret_cast<const ExplicitTemplateArgumentList*>(this + 1); 1678 } 1679 1680 /// \brief Retrieves the optional explicit template arguments. 1681 /// This points to the same data as getExplicitTemplateArgs(), but 1682 /// returns null if there are no explicit template arguments. 1683 const ExplicitTemplateArgumentList *getOptionalExplicitTemplateArgs() { 1684 if (!hasExplicitTemplateArgs()) return 0; 1685 return &getExplicitTemplateArgs(); 1686 } 1687 1688 /// \brief Copies the template arguments (if present) into the given 1689 /// structure. 1690 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1691 getExplicitTemplateArgs().copyInto(List); 1692 } 1693 1694 SourceLocation getLAngleLoc() const { 1695 return getExplicitTemplateArgs().LAngleLoc; 1696 } 1697 1698 SourceLocation getRAngleLoc() const { 1699 return getExplicitTemplateArgs().RAngleLoc; 1700 } 1701 1702 TemplateArgumentLoc const *getTemplateArgs() const { 1703 return getExplicitTemplateArgs().getTemplateArgs(); 1704 } 1705 1706 unsigned getNumTemplateArgs() const { 1707 return getExplicitTemplateArgs().NumTemplateArgs; 1708 } 1709 1710 virtual SourceRange getSourceRange() const { 1711 SourceRange Range(getNameInfo().getSourceRange()); 1712 if (getQualifier()) Range.setBegin(getQualifierRange().getBegin()); 1713 if (hasExplicitTemplateArgs()) Range.setEnd(getRAngleLoc()); 1714 return Range; 1715 } 1716 1717 virtual StmtIterator child_begin(); 1718 virtual StmtIterator child_end(); 1719 1720 static bool classof(const Stmt *T) { 1721 return T->getStmtClass() == UnresolvedLookupExprClass; 1722 } 1723 static bool classof(const UnresolvedLookupExpr *) { return true; } 1724}; 1725 1726/// \brief A qualified reference to a name whose declaration cannot 1727/// yet be resolved. 1728/// 1729/// DependentScopeDeclRefExpr is similar to DeclRefExpr in that 1730/// it expresses a reference to a declaration such as 1731/// X<T>::value. The difference, however, is that an 1732/// DependentScopeDeclRefExpr node is used only within C++ templates when 1733/// the qualification (e.g., X<T>::) refers to a dependent type. In 1734/// this case, X<T>::value cannot resolve to a declaration because the 1735/// declaration will differ from on instantiation of X<T> to the 1736/// next. Therefore, DependentScopeDeclRefExpr keeps track of the 1737/// qualifier (X<T>::) and the name of the entity being referenced 1738/// ("value"). Such expressions will instantiate to a DeclRefExpr once the 1739/// declaration can be found. 1740class DependentScopeDeclRefExpr : public Expr { 1741 /// The name of the entity we will be referencing. 1742 DeclarationNameInfo NameInfo; 1743 1744 /// QualifierRange - The source range that covers the 1745 /// nested-name-specifier. 1746 SourceRange QualifierRange; 1747 1748 /// \brief The nested-name-specifier that qualifies this unresolved 1749 /// declaration name. 1750 NestedNameSpecifier *Qualifier; 1751 1752 /// \brief Whether the name includes explicit template arguments. 1753 bool HasExplicitTemplateArgs; 1754 1755 DependentScopeDeclRefExpr(QualType T, 1756 NestedNameSpecifier *Qualifier, 1757 SourceRange QualifierRange, 1758 const DeclarationNameInfo &NameInfo, 1759 bool HasExplicitTemplateArgs) 1760 : Expr(DependentScopeDeclRefExprClass, T, true, true), 1761 NameInfo(NameInfo), QualifierRange(QualifierRange), Qualifier(Qualifier), 1762 HasExplicitTemplateArgs(HasExplicitTemplateArgs) 1763 {} 1764 1765public: 1766 static DependentScopeDeclRefExpr *Create(ASTContext &C, 1767 NestedNameSpecifier *Qualifier, 1768 SourceRange QualifierRange, 1769 const DeclarationNameInfo &NameInfo, 1770 const TemplateArgumentListInfo *TemplateArgs = 0); 1771 1772 static DependentScopeDeclRefExpr *CreateEmpty(ASTContext &C, 1773 unsigned NumTemplateArgs); 1774 1775 /// \brief Retrieve the name that this expression refers to. 1776 const DeclarationNameInfo &getNameInfo() const { return NameInfo; } 1777 void setNameInfo(const DeclarationNameInfo &N) { NameInfo = N; } 1778 1779 /// \brief Retrieve the name that this expression refers to. 1780 DeclarationName getDeclName() const { return NameInfo.getName(); } 1781 void setDeclName(DeclarationName N) { NameInfo.setName(N); } 1782 1783 /// \brief Retrieve the location of the name within the expression. 1784 SourceLocation getLocation() const { return NameInfo.getLoc(); } 1785 void setLocation(SourceLocation L) { NameInfo.setLoc(L); } 1786 1787 /// \brief Retrieve the source range of the nested-name-specifier. 1788 SourceRange getQualifierRange() const { return QualifierRange; } 1789 void setQualifierRange(SourceRange R) { QualifierRange = R; } 1790 1791 /// \brief Retrieve the nested-name-specifier that qualifies this 1792 /// declaration. 1793 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1794 void setQualifier(NestedNameSpecifier *NNS) { Qualifier = NNS; } 1795 1796 /// Determines whether this lookup had explicit template arguments. 1797 bool hasExplicitTemplateArgs() const { return HasExplicitTemplateArgs; } 1798 1799 // Note that, inconsistently with the explicit-template-argument AST 1800 // nodes, users are *forbidden* from calling these methods on objects 1801 // without explicit template arguments. 1802 1803 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 1804 assert(hasExplicitTemplateArgs()); 1805 return *reinterpret_cast<ExplicitTemplateArgumentList*>(this + 1); 1806 } 1807 1808 /// Gets a reference to the explicit template argument list. 1809 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1810 assert(hasExplicitTemplateArgs()); 1811 return *reinterpret_cast<const ExplicitTemplateArgumentList*>(this + 1); 1812 } 1813 1814 /// \brief Retrieves the optional explicit template arguments. 1815 /// This points to the same data as getExplicitTemplateArgs(), but 1816 /// returns null if there are no explicit template arguments. 1817 const ExplicitTemplateArgumentList *getOptionalExplicitTemplateArgs() { 1818 if (!hasExplicitTemplateArgs()) return 0; 1819 return &getExplicitTemplateArgs(); 1820 } 1821 1822 /// \brief Copies the template arguments (if present) into the given 1823 /// structure. 1824 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1825 getExplicitTemplateArgs().copyInto(List); 1826 } 1827 1828 SourceLocation getLAngleLoc() const { 1829 return getExplicitTemplateArgs().LAngleLoc; 1830 } 1831 1832 SourceLocation getRAngleLoc() const { 1833 return getExplicitTemplateArgs().RAngleLoc; 1834 } 1835 1836 TemplateArgumentLoc const *getTemplateArgs() const { 1837 return getExplicitTemplateArgs().getTemplateArgs(); 1838 } 1839 1840 unsigned getNumTemplateArgs() const { 1841 return getExplicitTemplateArgs().NumTemplateArgs; 1842 } 1843 1844 virtual SourceRange getSourceRange() const { 1845 SourceRange Range(QualifierRange.getBegin(), getLocation()); 1846 if (hasExplicitTemplateArgs()) 1847 Range.setEnd(getRAngleLoc()); 1848 return Range; 1849 } 1850 1851 static bool classof(const Stmt *T) { 1852 return T->getStmtClass() == DependentScopeDeclRefExprClass; 1853 } 1854 static bool classof(const DependentScopeDeclRefExpr *) { return true; } 1855 1856 virtual StmtIterator child_begin(); 1857 virtual StmtIterator child_end(); 1858 1859 friend class ASTStmtReader; 1860 friend class ASTStmtWriter; 1861}; 1862 1863class CXXExprWithTemporaries : public Expr { 1864 Stmt *SubExpr; 1865 1866 CXXTemporary **Temps; 1867 unsigned NumTemps; 1868 1869 CXXExprWithTemporaries(ASTContext &C, Expr *SubExpr, CXXTemporary **Temps, 1870 unsigned NumTemps); 1871 1872public: 1873 CXXExprWithTemporaries(EmptyShell Empty) 1874 : Expr(CXXExprWithTemporariesClass, Empty), 1875 SubExpr(0), Temps(0), NumTemps(0) {} 1876 1877 static CXXExprWithTemporaries *Create(ASTContext &C, Expr *SubExpr, 1878 CXXTemporary **Temps, 1879 unsigned NumTemps); 1880 1881 unsigned getNumTemporaries() const { return NumTemps; } 1882 void setNumTemporaries(ASTContext &C, unsigned N); 1883 1884 CXXTemporary *getTemporary(unsigned i) { 1885 assert(i < NumTemps && "Index out of range"); 1886 return Temps[i]; 1887 } 1888 const CXXTemporary *getTemporary(unsigned i) const { 1889 return const_cast<CXXExprWithTemporaries*>(this)->getTemporary(i); 1890 } 1891 void setTemporary(unsigned i, CXXTemporary *T) { 1892 assert(i < NumTemps && "Index out of range"); 1893 Temps[i] = T; 1894 } 1895 1896 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 1897 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 1898 void setSubExpr(Expr *E) { SubExpr = E; } 1899 1900 virtual SourceRange getSourceRange() const { 1901 return SubExpr->getSourceRange(); 1902 } 1903 1904 // Implement isa/cast/dyncast/etc. 1905 static bool classof(const Stmt *T) { 1906 return T->getStmtClass() == CXXExprWithTemporariesClass; 1907 } 1908 static bool classof(const CXXExprWithTemporaries *) { return true; } 1909 1910 // Iterators 1911 virtual child_iterator child_begin(); 1912 virtual child_iterator child_end(); 1913}; 1914 1915/// \brief Describes an explicit type conversion that uses functional 1916/// notion but could not be resolved because one or more arguments are 1917/// type-dependent. 1918/// 1919/// The explicit type conversions expressed by 1920/// CXXUnresolvedConstructExpr have the form \c T(a1, a2, ..., aN), 1921/// where \c T is some type and \c a1, a2, ..., aN are values, and 1922/// either \C T is a dependent type or one or more of the \c a's is 1923/// type-dependent. For example, this would occur in a template such 1924/// as: 1925/// 1926/// \code 1927/// template<typename T, typename A1> 1928/// inline T make_a(const A1& a1) { 1929/// return T(a1); 1930/// } 1931/// \endcode 1932/// 1933/// When the returned expression is instantiated, it may resolve to a 1934/// constructor call, conversion function call, or some kind of type 1935/// conversion. 1936class CXXUnresolvedConstructExpr : public Expr { 1937 /// \brief The type being constructed. 1938 TypeSourceInfo *Type; 1939 1940 /// \brief The location of the left parentheses ('('). 1941 SourceLocation LParenLoc; 1942 1943 /// \brief The location of the right parentheses (')'). 1944 SourceLocation RParenLoc; 1945 1946 /// \brief The number of arguments used to construct the type. 1947 unsigned NumArgs; 1948 1949 CXXUnresolvedConstructExpr(TypeSourceInfo *Type, 1950 SourceLocation LParenLoc, 1951 Expr **Args, 1952 unsigned NumArgs, 1953 SourceLocation RParenLoc); 1954 1955 CXXUnresolvedConstructExpr(EmptyShell Empty, unsigned NumArgs) 1956 : Expr(CXXUnresolvedConstructExprClass, Empty), Type(), NumArgs(NumArgs) { } 1957 1958 friend class ASTStmtReader; 1959 1960public: 1961 static CXXUnresolvedConstructExpr *Create(ASTContext &C, 1962 TypeSourceInfo *Type, 1963 SourceLocation LParenLoc, 1964 Expr **Args, 1965 unsigned NumArgs, 1966 SourceLocation RParenLoc); 1967 1968 static CXXUnresolvedConstructExpr *CreateEmpty(ASTContext &C, 1969 unsigned NumArgs); 1970 1971 /// \brief Retrieve the type that is being constructed, as specified 1972 /// in the source code. 1973 QualType getTypeAsWritten() const { return Type->getType(); } 1974 1975 /// \brief Retrieve the type source information for the type being 1976 /// constructed. 1977 TypeSourceInfo *getTypeSourceInfo() const { return Type; } 1978 1979 /// \brief Retrieve the location of the left parentheses ('(') that 1980 /// precedes the argument list. 1981 SourceLocation getLParenLoc() const { return LParenLoc; } 1982 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 1983 1984 /// \brief Retrieve the location of the right parentheses (')') that 1985 /// follows the argument list. 1986 SourceLocation getRParenLoc() const { return RParenLoc; } 1987 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1988 1989 /// \brief Retrieve the number of arguments. 1990 unsigned arg_size() const { return NumArgs; } 1991 1992 typedef Expr** arg_iterator; 1993 arg_iterator arg_begin() { return reinterpret_cast<Expr**>(this + 1); } 1994 arg_iterator arg_end() { return arg_begin() + NumArgs; } 1995 1996 typedef const Expr* const * const_arg_iterator; 1997 const_arg_iterator arg_begin() const { 1998 return reinterpret_cast<const Expr* const *>(this + 1); 1999 } 2000 const_arg_iterator arg_end() const { 2001 return arg_begin() + NumArgs; 2002 } 2003 2004 Expr *getArg(unsigned I) { 2005 assert(I < NumArgs && "Argument index out-of-range"); 2006 return *(arg_begin() + I); 2007 } 2008 2009 const Expr *getArg(unsigned I) const { 2010 assert(I < NumArgs && "Argument index out-of-range"); 2011 return *(arg_begin() + I); 2012 } 2013 2014 void setArg(unsigned I, Expr *E) { 2015 assert(I < NumArgs && "Argument index out-of-range"); 2016 *(arg_begin() + I) = E; 2017 } 2018 2019 virtual SourceRange getSourceRange() const; 2020 2021 static bool classof(const Stmt *T) { 2022 return T->getStmtClass() == CXXUnresolvedConstructExprClass; 2023 } 2024 static bool classof(const CXXUnresolvedConstructExpr *) { return true; } 2025 2026 // Iterators 2027 virtual child_iterator child_begin(); 2028 virtual child_iterator child_end(); 2029}; 2030 2031/// \brief Represents a C++ member access expression where the actual 2032/// member referenced could not be resolved because the base 2033/// expression or the member name was dependent. 2034/// 2035/// Like UnresolvedMemberExprs, these can be either implicit or 2036/// explicit accesses. It is only possible to get one of these with 2037/// an implicit access if a qualifier is provided. 2038class CXXDependentScopeMemberExpr : public Expr { 2039 /// \brief The expression for the base pointer or class reference, 2040 /// e.g., the \c x in x.f. Can be null in implicit accesses. 2041 Stmt *Base; 2042 2043 /// \brief The type of the base expression. Never null, even for 2044 /// implicit accesses. 2045 QualType BaseType; 2046 2047 /// \brief Whether this member expression used the '->' operator or 2048 /// the '.' operator. 2049 bool IsArrow : 1; 2050 2051 /// \brief Whether this member expression has explicitly-specified template 2052 /// arguments. 2053 bool HasExplicitTemplateArgs : 1; 2054 2055 /// \brief The location of the '->' or '.' operator. 2056 SourceLocation OperatorLoc; 2057 2058 /// \brief The nested-name-specifier that precedes the member name, if any. 2059 NestedNameSpecifier *Qualifier; 2060 2061 /// \brief The source range covering the nested name specifier. 2062 SourceRange QualifierRange; 2063 2064 /// \brief In a qualified member access expression such as t->Base::f, this 2065 /// member stores the resolves of name lookup in the context of the member 2066 /// access expression, to be used at instantiation time. 2067 /// 2068 /// FIXME: This member, along with the Qualifier and QualifierRange, could 2069 /// be stuck into a structure that is optionally allocated at the end of 2070 /// the CXXDependentScopeMemberExpr, to save space in the common case. 2071 NamedDecl *FirstQualifierFoundInScope; 2072 2073 /// \brief The member to which this member expression refers, which 2074 /// can be name, overloaded operator, or destructor. 2075 /// FIXME: could also be a template-id 2076 DeclarationNameInfo MemberNameInfo; 2077 2078 CXXDependentScopeMemberExpr(ASTContext &C, 2079 Expr *Base, QualType BaseType, bool IsArrow, 2080 SourceLocation OperatorLoc, 2081 NestedNameSpecifier *Qualifier, 2082 SourceRange QualifierRange, 2083 NamedDecl *FirstQualifierFoundInScope, 2084 DeclarationNameInfo MemberNameInfo, 2085 const TemplateArgumentListInfo *TemplateArgs); 2086 2087public: 2088 CXXDependentScopeMemberExpr(ASTContext &C, 2089 Expr *Base, QualType BaseType, 2090 bool IsArrow, 2091 SourceLocation OperatorLoc, 2092 NestedNameSpecifier *Qualifier, 2093 SourceRange QualifierRange, 2094 NamedDecl *FirstQualifierFoundInScope, 2095 DeclarationNameInfo MemberNameInfo) 2096 : Expr(CXXDependentScopeMemberExprClass, C.DependentTy, true, true), 2097 Base(Base), BaseType(BaseType), IsArrow(IsArrow), 2098 HasExplicitTemplateArgs(false), OperatorLoc(OperatorLoc), 2099 Qualifier(Qualifier), QualifierRange(QualifierRange), 2100 FirstQualifierFoundInScope(FirstQualifierFoundInScope), 2101 MemberNameInfo(MemberNameInfo) { } 2102 2103 static CXXDependentScopeMemberExpr * 2104 Create(ASTContext &C, 2105 Expr *Base, QualType BaseType, bool IsArrow, 2106 SourceLocation OperatorLoc, 2107 NestedNameSpecifier *Qualifier, 2108 SourceRange QualifierRange, 2109 NamedDecl *FirstQualifierFoundInScope, 2110 DeclarationNameInfo MemberNameInfo, 2111 const TemplateArgumentListInfo *TemplateArgs); 2112 2113 static CXXDependentScopeMemberExpr * 2114 CreateEmpty(ASTContext &C, unsigned NumTemplateArgs); 2115 2116 /// \brief True if this is an implicit access, i.e. one in which the 2117 /// member being accessed was not written in the source. The source 2118 /// location of the operator is invalid in this case. 2119 bool isImplicitAccess() const { return Base == 0; } 2120 2121 /// \brief Retrieve the base object of this member expressions, 2122 /// e.g., the \c x in \c x.m. 2123 Expr *getBase() const { 2124 assert(!isImplicitAccess()); 2125 return cast<Expr>(Base); 2126 } 2127 void setBase(Expr *E) { Base = E; } 2128 2129 QualType getBaseType() const { return BaseType; } 2130 void setBaseType(QualType T) { BaseType = T; } 2131 2132 /// \brief Determine whether this member expression used the '->' 2133 /// operator; otherwise, it used the '.' operator. 2134 bool isArrow() const { return IsArrow; } 2135 void setArrow(bool A) { IsArrow = A; } 2136 2137 /// \brief Retrieve the location of the '->' or '.' operator. 2138 SourceLocation getOperatorLoc() const { return OperatorLoc; } 2139 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 2140 2141 /// \brief Retrieve the nested-name-specifier that qualifies the member 2142 /// name. 2143 NestedNameSpecifier *getQualifier() const { return Qualifier; } 2144 void setQualifier(NestedNameSpecifier *NNS) { Qualifier = NNS; } 2145 2146 /// \brief Retrieve the source range covering the nested-name-specifier 2147 /// that qualifies the member name. 2148 SourceRange getQualifierRange() const { return QualifierRange; } 2149 void setQualifierRange(SourceRange R) { QualifierRange = R; } 2150 2151 /// \brief Retrieve the first part of the nested-name-specifier that was 2152 /// found in the scope of the member access expression when the member access 2153 /// was initially parsed. 2154 /// 2155 /// This function only returns a useful result when member access expression 2156 /// uses a qualified member name, e.g., "x.Base::f". Here, the declaration 2157 /// returned by this function describes what was found by unqualified name 2158 /// lookup for the identifier "Base" within the scope of the member access 2159 /// expression itself. At template instantiation time, this information is 2160 /// combined with the results of name lookup into the type of the object 2161 /// expression itself (the class type of x). 2162 NamedDecl *getFirstQualifierFoundInScope() const { 2163 return FirstQualifierFoundInScope; 2164 } 2165 void setFirstQualifierFoundInScope(NamedDecl *D) { 2166 FirstQualifierFoundInScope = D; 2167 } 2168 2169 /// \brief Retrieve the name of the member that this expression 2170 /// refers to. 2171 const DeclarationNameInfo &getMemberNameInfo() const { 2172 return MemberNameInfo; 2173 } 2174 void setMemberNameInfo(const DeclarationNameInfo &N) { MemberNameInfo = N; } 2175 2176 /// \brief Retrieve the name of the member that this expression 2177 /// refers to. 2178 DeclarationName getMember() const { return MemberNameInfo.getName(); } 2179 void setMember(DeclarationName N) { MemberNameInfo.setName(N); } 2180 2181 // \brief Retrieve the location of the name of the member that this 2182 // expression refers to. 2183 SourceLocation getMemberLoc() const { return MemberNameInfo.getLoc(); } 2184 void setMemberLoc(SourceLocation L) { MemberNameInfo.setLoc(L); } 2185 2186 /// \brief Determines whether this member expression actually had a C++ 2187 /// template argument list explicitly specified, e.g., x.f<int>. 2188 bool hasExplicitTemplateArgs() const { 2189 return HasExplicitTemplateArgs; 2190 } 2191 2192 /// \brief Retrieve the explicit template argument list that followed the 2193 /// member template name, if any. 2194 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 2195 assert(HasExplicitTemplateArgs); 2196 return *reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 2197 } 2198 2199 /// \brief Retrieve the explicit template argument list that followed the 2200 /// member template name, if any. 2201 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 2202 return const_cast<CXXDependentScopeMemberExpr *>(this) 2203 ->getExplicitTemplateArgs(); 2204 } 2205 2206 /// \brief Retrieves the optional explicit template arguments. 2207 /// This points to the same data as getExplicitTemplateArgs(), but 2208 /// returns null if there are no explicit template arguments. 2209 const ExplicitTemplateArgumentList *getOptionalExplicitTemplateArgs() { 2210 if (!hasExplicitTemplateArgs()) return 0; 2211 return &getExplicitTemplateArgs(); 2212 } 2213 2214 /// \brief Copies the template arguments (if present) into the given 2215 /// structure. 2216 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 2217 getExplicitTemplateArgs().copyInto(List); 2218 } 2219 2220 /// \brief Initializes the template arguments using the given structure. 2221 void initializeTemplateArgumentsFrom(const TemplateArgumentListInfo &List) { 2222 getExplicitTemplateArgs().initializeFrom(List); 2223 } 2224 2225 /// \brief Retrieve the location of the left angle bracket following the 2226 /// member name ('<'), if any. 2227 SourceLocation getLAngleLoc() const { 2228 return getExplicitTemplateArgs().LAngleLoc; 2229 } 2230 2231 /// \brief Retrieve the template arguments provided as part of this 2232 /// template-id. 2233 const TemplateArgumentLoc *getTemplateArgs() const { 2234 return getExplicitTemplateArgs().getTemplateArgs(); 2235 } 2236 2237 /// \brief Retrieve the number of template arguments provided as part of this 2238 /// template-id. 2239 unsigned getNumTemplateArgs() const { 2240 return getExplicitTemplateArgs().NumTemplateArgs; 2241 } 2242 2243 /// \brief Retrieve the location of the right angle bracket following the 2244 /// template arguments ('>'). 2245 SourceLocation getRAngleLoc() const { 2246 return getExplicitTemplateArgs().RAngleLoc; 2247 } 2248 2249 virtual SourceRange getSourceRange() const { 2250 SourceRange Range; 2251 if (!isImplicitAccess()) 2252 Range.setBegin(Base->getSourceRange().getBegin()); 2253 else if (getQualifier()) 2254 Range.setBegin(getQualifierRange().getBegin()); 2255 else 2256 Range.setBegin(MemberNameInfo.getBeginLoc()); 2257 2258 if (hasExplicitTemplateArgs()) 2259 Range.setEnd(getRAngleLoc()); 2260 else 2261 Range.setEnd(MemberNameInfo.getEndLoc()); 2262 return Range; 2263 } 2264 2265 static bool classof(const Stmt *T) { 2266 return T->getStmtClass() == CXXDependentScopeMemberExprClass; 2267 } 2268 static bool classof(const CXXDependentScopeMemberExpr *) { return true; } 2269 2270 // Iterators 2271 virtual child_iterator child_begin(); 2272 virtual child_iterator child_end(); 2273 2274 friend class ASTStmtReader; 2275 friend class ASTStmtWriter; 2276}; 2277 2278/// \brief Represents a C++ member access expression for which lookup 2279/// produced a set of overloaded functions. 2280/// 2281/// The member access may be explicit or implicit: 2282/// struct A { 2283/// int a, b; 2284/// int explicitAccess() { return this->a + this->A::b; } 2285/// int implicitAccess() { return a + A::b; } 2286/// }; 2287/// 2288/// In the final AST, an explicit access always becomes a MemberExpr. 2289/// An implicit access may become either a MemberExpr or a 2290/// DeclRefExpr, depending on whether the member is static. 2291class UnresolvedMemberExpr : public OverloadExpr { 2292 /// \brief Whether this member expression used the '->' operator or 2293 /// the '.' operator. 2294 bool IsArrow : 1; 2295 2296 /// \brief Whether the lookup results contain an unresolved using 2297 /// declaration. 2298 bool HasUnresolvedUsing : 1; 2299 2300 /// \brief The expression for the base pointer or class reference, 2301 /// e.g., the \c x in x.f. This can be null if this is an 'unbased' 2302 /// member expression 2303 Stmt *Base; 2304 2305 /// \brief The type of the base expression; never null. 2306 QualType BaseType; 2307 2308 /// \brief The location of the '->' or '.' operator. 2309 SourceLocation OperatorLoc; 2310 2311 UnresolvedMemberExpr(ASTContext &C, QualType T, bool Dependent, 2312 bool HasUnresolvedUsing, 2313 Expr *Base, QualType BaseType, bool IsArrow, 2314 SourceLocation OperatorLoc, 2315 NestedNameSpecifier *Qualifier, 2316 SourceRange QualifierRange, 2317 const DeclarationNameInfo &MemberNameInfo, 2318 const TemplateArgumentListInfo *TemplateArgs, 2319 UnresolvedSetIterator Begin, UnresolvedSetIterator End); 2320 2321 UnresolvedMemberExpr(EmptyShell Empty) 2322 : OverloadExpr(UnresolvedMemberExprClass, Empty), IsArrow(false), 2323 HasUnresolvedUsing(false), Base(0) { } 2324 2325public: 2326 static UnresolvedMemberExpr * 2327 Create(ASTContext &C, bool Dependent, bool HasUnresolvedUsing, 2328 Expr *Base, QualType BaseType, bool IsArrow, 2329 SourceLocation OperatorLoc, 2330 NestedNameSpecifier *Qualifier, 2331 SourceRange QualifierRange, 2332 const DeclarationNameInfo &MemberNameInfo, 2333 const TemplateArgumentListInfo *TemplateArgs, 2334 UnresolvedSetIterator Begin, UnresolvedSetIterator End); 2335 2336 static UnresolvedMemberExpr * 2337 CreateEmpty(ASTContext &C, unsigned NumTemplateArgs); 2338 2339 /// \brief True if this is an implicit access, i.e. one in which the 2340 /// member being accessed was not written in the source. The source 2341 /// location of the operator is invalid in this case. 2342 bool isImplicitAccess() const { return Base == 0; } 2343 2344 /// \brief Retrieve the base object of this member expressions, 2345 /// e.g., the \c x in \c x.m. 2346 Expr *getBase() { 2347 assert(!isImplicitAccess()); 2348 return cast<Expr>(Base); 2349 } 2350 const Expr *getBase() const { 2351 assert(!isImplicitAccess()); 2352 return cast<Expr>(Base); 2353 } 2354 void setBase(Expr *E) { Base = E; } 2355 2356 QualType getBaseType() const { return BaseType; } 2357 void setBaseType(QualType T) { BaseType = T; } 2358 2359 /// \brief Determine whether the lookup results contain an unresolved using 2360 /// declaration. 2361 bool hasUnresolvedUsing() const { return HasUnresolvedUsing; } 2362 void setHasUnresolvedUsing(bool V) { HasUnresolvedUsing = V; } 2363 2364 /// \brief Determine whether this member expression used the '->' 2365 /// operator; otherwise, it used the '.' operator. 2366 bool isArrow() const { return IsArrow; } 2367 void setArrow(bool A) { IsArrow = A; } 2368 2369 /// \brief Retrieve the location of the '->' or '.' operator. 2370 SourceLocation getOperatorLoc() const { return OperatorLoc; } 2371 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 2372 2373 /// \brief Retrieves the naming class of this lookup. 2374 CXXRecordDecl *getNamingClass() const; 2375 2376 /// \brief Retrieve the full name info for the member that this expression 2377 /// refers to. 2378 const DeclarationNameInfo &getMemberNameInfo() const { return getNameInfo(); } 2379 void setMemberNameInfo(const DeclarationNameInfo &N) { setNameInfo(N); } 2380 2381 /// \brief Retrieve the name of the member that this expression 2382 /// refers to. 2383 DeclarationName getMemberName() const { return getName(); } 2384 void setMemberName(DeclarationName N) { setName(N); } 2385 2386 // \brief Retrieve the location of the name of the member that this 2387 // expression refers to. 2388 SourceLocation getMemberLoc() const { return getNameLoc(); } 2389 void setMemberLoc(SourceLocation L) { setNameLoc(L); } 2390 2391 /// \brief Retrieve the explicit template argument list that followed the 2392 /// member template name. 2393 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 2394 assert(hasExplicitTemplateArgs()); 2395 return *reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 2396 } 2397 2398 /// \brief Retrieve the explicit template argument list that followed the 2399 /// member template name, if any. 2400 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 2401 assert(hasExplicitTemplateArgs()); 2402 return *reinterpret_cast<const ExplicitTemplateArgumentList *>(this + 1); 2403 } 2404 2405 /// \brief Retrieves the optional explicit template arguments. 2406 /// This points to the same data as getExplicitTemplateArgs(), but 2407 /// returns null if there are no explicit template arguments. 2408 const ExplicitTemplateArgumentList *getOptionalExplicitTemplateArgs() { 2409 if (!hasExplicitTemplateArgs()) return 0; 2410 return &getExplicitTemplateArgs(); 2411 } 2412 2413 /// \brief Copies the template arguments into the given structure. 2414 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 2415 getExplicitTemplateArgs().copyInto(List); 2416 } 2417 2418 /// \brief Retrieve the location of the left angle bracket following 2419 /// the member name ('<'). 2420 SourceLocation getLAngleLoc() const { 2421 return getExplicitTemplateArgs().LAngleLoc; 2422 } 2423 2424 /// \brief Retrieve the template arguments provided as part of this 2425 /// template-id. 2426 const TemplateArgumentLoc *getTemplateArgs() const { 2427 return getExplicitTemplateArgs().getTemplateArgs(); 2428 } 2429 2430 /// \brief Retrieve the number of template arguments provided as 2431 /// part of this template-id. 2432 unsigned getNumTemplateArgs() const { 2433 return getExplicitTemplateArgs().NumTemplateArgs; 2434 } 2435 2436 /// \brief Retrieve the location of the right angle bracket 2437 /// following the template arguments ('>'). 2438 SourceLocation getRAngleLoc() const { 2439 return getExplicitTemplateArgs().RAngleLoc; 2440 } 2441 2442 virtual SourceRange getSourceRange() const { 2443 SourceRange Range = getMemberNameInfo().getSourceRange(); 2444 if (!isImplicitAccess()) 2445 Range.setBegin(Base->getSourceRange().getBegin()); 2446 else if (getQualifier()) 2447 Range.setBegin(getQualifierRange().getBegin()); 2448 2449 if (hasExplicitTemplateArgs()) 2450 Range.setEnd(getRAngleLoc()); 2451 return Range; 2452 } 2453 2454 static bool classof(const Stmt *T) { 2455 return T->getStmtClass() == UnresolvedMemberExprClass; 2456 } 2457 static bool classof(const UnresolvedMemberExpr *) { return true; } 2458 2459 // Iterators 2460 virtual child_iterator child_begin(); 2461 virtual child_iterator child_end(); 2462}; 2463 2464/// \brief Represents a C++0x noexcept expression (C++ [expr.unary.noexcept]). 2465/// 2466/// The noexcept expression tests whether a given expression might throw. Its 2467/// result is a boolean constant. 2468class CXXNoexceptExpr : public Expr { 2469 bool Value : 1; 2470 Stmt *Operand; 2471 SourceRange Range; 2472 2473 friend class ASTStmtReader; 2474 2475public: 2476 CXXNoexceptExpr(QualType Ty, Expr *Operand, CanThrowResult Val, 2477 SourceLocation Keyword, SourceLocation RParen) 2478 : Expr(CXXNoexceptExprClass, Ty, /*TypeDependent*/false, 2479 /*ValueDependent*/Val == CT_Dependent), 2480 Value(Val == CT_Cannot), Operand(Operand), Range(Keyword, RParen) 2481 { } 2482 2483 CXXNoexceptExpr(EmptyShell Empty) 2484 : Expr(CXXNoexceptExprClass, Empty) 2485 { } 2486 2487 Expr *getOperand() const { return static_cast<Expr*>(Operand); } 2488 2489 virtual SourceRange getSourceRange() const { return Range; } 2490 2491 bool getValue() const { return Value; } 2492 2493 static bool classof(const Stmt *T) { 2494 return T->getStmtClass() == CXXNoexceptExprClass; 2495 } 2496 static bool classof(const CXXNoexceptExpr *) { return true; } 2497 2498 // Iterators 2499 virtual child_iterator child_begin(); 2500 virtual child_iterator child_end(); 2501}; 2502 2503inline ExplicitTemplateArgumentList &OverloadExpr::getExplicitTemplateArgs() { 2504 if (isa<UnresolvedLookupExpr>(this)) 2505 return cast<UnresolvedLookupExpr>(this)->getExplicitTemplateArgs(); 2506 else 2507 return cast<UnresolvedMemberExpr>(this)->getExplicitTemplateArgs(); 2508} 2509 2510} // end namespace clang 2511 2512#endif 2513