ExprCXX.h revision 007a9b1c632bfaac20e41c60cbe07fdc6d0e647c
1c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom//===--- ExprCXX.h - Classes for representing expressions -------*- C++ -*-===// 2c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom// 3c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom// The LLVM Compiler Infrastructure 4c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom// 5c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom// This file is distributed under the University of Illinois Open Source 6c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom// License. See LICENSE.TXT for details. 7c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom// 8c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom//===----------------------------------------------------------------------===// 9c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom// 10c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom// This file defines the Expr interface and subclasses for C++ expressions. 11c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom// 12c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom//===----------------------------------------------------------------------===// 13c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom 14c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom#ifndef LLVM_CLANG_AST_EXPRCXX_H 15c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom#define LLVM_CLANG_AST_EXPRCXX_H 16c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom 17c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom#include "clang/Basic/TypeTraits.h" 18c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom#include "clang/AST/Expr.h" 19c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom#include "clang/AST/UnresolvedSet.h" 20c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom#include "clang/AST/TemplateBase.h" 21c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom 22c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstromnamespace clang { 23c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom 24c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom class CXXConstructorDecl; 25c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom class CXXDestructorDecl; 26c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom class CXXMethodDecl; 27c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom class CXXTemporary; 28c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom class TemplateArgumentListInfo; 29c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom 30c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom//===--------------------------------------------------------------------===// 31c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom// C++ Expressions. 32c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom//===--------------------------------------------------------------------===// 33c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom 34c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom/// \brief A call to an overloaded operator written using operator 35c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom/// syntax. 36c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom/// 37c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom/// Represents a call to an overloaded operator written using operator 38c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom/// syntax, e.g., "x + y" or "*p". While semantically equivalent to a 39c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom/// normal call, this AST node provides better information about the 40c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom/// syntactic representation of the call. 41c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom/// 42c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom/// In a C++ template, this expression node kind will be used whenever 43c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom/// any of the arguments are type-dependent. In this case, the 44c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom/// function itself will be a (possibly empty) set of functions and 45c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom/// function templates that were found by name lookup at template 46c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom/// definition time. 47c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstromclass CXXOperatorCallExpr : public CallExpr { 48c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom /// \brief The overloaded operator. 49c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom OverloadedOperatorKind Operator; 50c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom 51c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrompublic: 52c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom CXXOperatorCallExpr(ASTContext& C, OverloadedOperatorKind Op, Expr *fn, 53c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom Expr **args, unsigned numargs, QualType t, 54c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom SourceLocation operatorloc) 55c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom : CallExpr(C, CXXOperatorCallExprClass, fn, args, numargs, t, operatorloc), 56c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom Operator(Op) {} 57c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom explicit CXXOperatorCallExpr(ASTContext& C, EmptyShell Empty) : 58c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom CallExpr(C, CXXOperatorCallExprClass, Empty) { } 59c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom 60c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom 61c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom /// getOperator - Returns the kind of overloaded operator that this 62c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom /// expression refers to. 63c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom OverloadedOperatorKind getOperator() const { return Operator; } 64c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom void setOperator(OverloadedOperatorKind Kind) { Operator = Kind; } 65c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom 66c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom /// getOperatorLoc - Returns the location of the operator symbol in 67c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom /// the expression. When @c getOperator()==OO_Call, this is the 68c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom /// location of the right parentheses; when @c 69c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom /// getOperator()==OO_Subscript, this is the location of the right 70c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom /// bracket. 71c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom SourceLocation getOperatorLoc() const { return getRParenLoc(); } 72c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom 73c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom virtual SourceRange getSourceRange() const; 74c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom 75c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom static bool classof(const Stmt *T) { 76c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom return T->getStmtClass() == CXXOperatorCallExprClass; 77c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom } 78c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom static bool classof(const CXXOperatorCallExpr *) { return true; } 79c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom}; 80c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom 81c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom/// CXXMemberCallExpr - Represents a call to a member function that 82c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom/// may be written either with member call syntax (e.g., "obj.func()" 83c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom/// or "objptr->func()") or with normal function-call syntax 84c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom/// ("func()") within a member function that ends up calling a member 85c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom/// function. The callee in either case is a MemberExpr that contains 86c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom/// both the object argument and the member function, while the 87c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom/// 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 : Expr(CXXBindTemporaryExprClass, subexpr->getType(), false, false), 677 Temp(temp), SubExpr(subexpr) { } 678 679public: 680 CXXBindTemporaryExpr(EmptyShell Empty) 681 : Expr(CXXBindTemporaryExprClass, Empty), Temp(0), SubExpr(0) {} 682 683 static CXXBindTemporaryExpr *Create(ASTContext &C, CXXTemporary *Temp, 684 Expr* SubExpr); 685 686 CXXTemporary *getTemporary() { return Temp; } 687 const CXXTemporary *getTemporary() const { return Temp; } 688 void setTemporary(CXXTemporary *T) { Temp = T; } 689 690 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 691 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 692 void setSubExpr(Expr *E) { SubExpr = E; } 693 694 virtual SourceRange getSourceRange() const { 695 return SubExpr->getSourceRange(); 696 } 697 698 // Implement isa/cast/dyncast/etc. 699 static bool classof(const Stmt *T) { 700 return T->getStmtClass() == CXXBindTemporaryExprClass; 701 } 702 static bool classof(const CXXBindTemporaryExpr *) { return true; } 703 704 // Iterators 705 virtual child_iterator child_begin(); 706 virtual child_iterator child_end(); 707}; 708 709/// CXXConstructExpr - Represents a call to a C++ constructor. 710class CXXConstructExpr : public Expr { 711public: 712 enum ConstructionKind { 713 CK_Complete, 714 CK_NonVirtualBase, 715 CK_VirtualBase 716 }; 717 718private: 719 CXXConstructorDecl *Constructor; 720 721 SourceLocation Loc; 722 SourceRange ParenRange; 723 bool Elidable : 1; 724 bool ZeroInitialization : 1; 725 unsigned ConstructKind : 2; 726 Stmt **Args; 727 unsigned NumArgs; 728 729protected: 730 CXXConstructExpr(ASTContext &C, StmtClass SC, QualType T, 731 SourceLocation Loc, 732 CXXConstructorDecl *d, bool elidable, 733 Expr **args, unsigned numargs, 734 bool ZeroInitialization = false, 735 ConstructionKind ConstructKind = CK_Complete, 736 SourceRange ParenRange = SourceRange()); 737 738 /// \brief Construct an empty C++ construction expression. 739 CXXConstructExpr(StmtClass SC, EmptyShell Empty) 740 : Expr(SC, Empty), Constructor(0), Elidable(0), ZeroInitialization(0), 741 ConstructKind(0), Args(0), NumArgs(0) { } 742 743public: 744 /// \brief Construct an empty C++ construction expression. 745 explicit CXXConstructExpr(EmptyShell Empty) 746 : Expr(CXXConstructExprClass, Empty), Constructor(0), 747 Elidable(0), ZeroInitialization(0), 748 ConstructKind(0), Args(0), NumArgs(0) { } 749 750 static CXXConstructExpr *Create(ASTContext &C, QualType T, 751 SourceLocation Loc, 752 CXXConstructorDecl *D, bool Elidable, 753 Expr **Args, unsigned NumArgs, 754 bool ZeroInitialization = false, 755 ConstructionKind ConstructKind = CK_Complete, 756 SourceRange ParenRange = SourceRange()); 757 758 759 CXXConstructorDecl* getConstructor() const { return Constructor; } 760 void setConstructor(CXXConstructorDecl *C) { Constructor = C; } 761 762 SourceLocation getLocation() const { return Loc; } 763 void setLocation(SourceLocation Loc) { this->Loc = Loc; } 764 765 /// \brief Whether this construction is elidable. 766 bool isElidable() const { return Elidable; } 767 void setElidable(bool E) { Elidable = E; } 768 769 /// \brief Whether this construction first requires 770 /// zero-initialization before the initializer is called. 771 bool requiresZeroInitialization() const { return ZeroInitialization; } 772 void setRequiresZeroInitialization(bool ZeroInit) { 773 ZeroInitialization = ZeroInit; 774 } 775 776 /// \brief Determines whether this constructor is actually constructing 777 /// a base class (rather than a complete object). 778 ConstructionKind getConstructionKind() const { 779 return (ConstructionKind)ConstructKind; 780 } 781 void setConstructionKind(ConstructionKind CK) { 782 ConstructKind = CK; 783 } 784 785 typedef ExprIterator arg_iterator; 786 typedef ConstExprIterator const_arg_iterator; 787 788 arg_iterator arg_begin() { return Args; } 789 arg_iterator arg_end() { return Args + NumArgs; } 790 const_arg_iterator arg_begin() const { return Args; } 791 const_arg_iterator arg_end() const { return Args + NumArgs; } 792 793 Expr **getArgs() const { return reinterpret_cast<Expr **>(Args); } 794 unsigned getNumArgs() const { return NumArgs; } 795 796 /// getArg - Return the specified argument. 797 Expr *getArg(unsigned Arg) { 798 assert(Arg < NumArgs && "Arg access out of range!"); 799 return cast<Expr>(Args[Arg]); 800 } 801 const Expr *getArg(unsigned Arg) const { 802 assert(Arg < NumArgs && "Arg access out of range!"); 803 return cast<Expr>(Args[Arg]); 804 } 805 806 /// setArg - Set the specified argument. 807 void setArg(unsigned Arg, Expr *ArgExpr) { 808 assert(Arg < NumArgs && "Arg access out of range!"); 809 Args[Arg] = ArgExpr; 810 } 811 812 virtual SourceRange getSourceRange() const; 813 SourceRange getParenRange() const { return ParenRange; } 814 815 static bool classof(const Stmt *T) { 816 return T->getStmtClass() == CXXConstructExprClass || 817 T->getStmtClass() == CXXTemporaryObjectExprClass; 818 } 819 static bool classof(const CXXConstructExpr *) { return true; } 820 821 // Iterators 822 virtual child_iterator child_begin(); 823 virtual child_iterator child_end(); 824 825 friend class ASTStmtReader; 826}; 827 828/// CXXFunctionalCastExpr - Represents an explicit C++ type conversion 829/// that uses "functional" notion (C++ [expr.type.conv]). Example: @c 830/// x = int(0.5); 831class CXXFunctionalCastExpr : public ExplicitCastExpr { 832 SourceLocation TyBeginLoc; 833 SourceLocation RParenLoc; 834 835 CXXFunctionalCastExpr(QualType ty, TypeSourceInfo *writtenTy, 836 SourceLocation tyBeginLoc, CastKind kind, 837 Expr *castExpr, unsigned pathSize, 838 SourceLocation rParenLoc) 839 : ExplicitCastExpr(CXXFunctionalCastExprClass, ty, kind, castExpr, 840 pathSize, writtenTy), 841 TyBeginLoc(tyBeginLoc), RParenLoc(rParenLoc) {} 842 843 explicit CXXFunctionalCastExpr(EmptyShell Shell, unsigned PathSize) 844 : ExplicitCastExpr(CXXFunctionalCastExprClass, Shell, PathSize) { } 845 846public: 847 static CXXFunctionalCastExpr *Create(ASTContext &Context, QualType T, 848 TypeSourceInfo *Written, 849 SourceLocation TyBeginLoc, 850 CastKind Kind, Expr *Op, 851 const CXXCastPath *Path, 852 SourceLocation RPLoc); 853 static CXXFunctionalCastExpr *CreateEmpty(ASTContext &Context, 854 unsigned PathSize); 855 856 SourceLocation getTypeBeginLoc() const { return TyBeginLoc; } 857 void setTypeBeginLoc(SourceLocation L) { TyBeginLoc = L; } 858 SourceLocation getRParenLoc() const { return RParenLoc; } 859 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 860 861 virtual SourceRange getSourceRange() const { 862 return SourceRange(TyBeginLoc, RParenLoc); 863 } 864 static bool classof(const Stmt *T) { 865 return T->getStmtClass() == CXXFunctionalCastExprClass; 866 } 867 static bool classof(const CXXFunctionalCastExpr *) { return true; } 868}; 869 870/// @brief Represents a C++ functional cast expression that builds a 871/// temporary object. 872/// 873/// This expression type represents a C++ "functional" cast 874/// (C++[expr.type.conv]) with N != 1 arguments that invokes a 875/// constructor to build a temporary object. With N == 1 arguments the 876/// functional cast expression will be represented by CXXFunctionalCastExpr. 877/// Example: 878/// @code 879/// struct X { X(int, float); } 880/// 881/// X create_X() { 882/// return X(1, 3.14f); // creates a CXXTemporaryObjectExpr 883/// }; 884/// @endcode 885class CXXTemporaryObjectExpr : public CXXConstructExpr { 886 TypeSourceInfo *Type; 887 888public: 889 CXXTemporaryObjectExpr(ASTContext &C, CXXConstructorDecl *Cons, 890 TypeSourceInfo *Type, 891 Expr **Args,unsigned NumArgs, 892 SourceRange parenRange, 893 bool ZeroInitialization = false); 894 explicit CXXTemporaryObjectExpr(EmptyShell Empty) 895 : CXXConstructExpr(CXXTemporaryObjectExprClass, Empty), Type() { } 896 897 TypeSourceInfo *getTypeSourceInfo() const { return Type; } 898 899 virtual SourceRange getSourceRange() const; 900 901 static bool classof(const Stmt *T) { 902 return T->getStmtClass() == CXXTemporaryObjectExprClass; 903 } 904 static bool classof(const CXXTemporaryObjectExpr *) { return true; } 905 906 friend class ASTStmtReader; 907}; 908 909/// CXXScalarValueInitExpr - [C++ 5.2.3p2] 910/// Expression "T()" which creates a value-initialized rvalue of type 911/// T, which is a non-class type. 912/// 913class CXXScalarValueInitExpr : public Expr { 914 SourceLocation RParenLoc; 915 TypeSourceInfo *TypeInfo; 916 917 friend class ASTStmtReader; 918 919public: 920 /// \brief Create an explicitly-written scalar-value initialization 921 /// expression. 922 CXXScalarValueInitExpr(QualType Type, 923 TypeSourceInfo *TypeInfo, 924 SourceLocation rParenLoc ) : 925 Expr(CXXScalarValueInitExprClass, Type, false, false), 926 RParenLoc(rParenLoc), TypeInfo(TypeInfo) {} 927 928 explicit CXXScalarValueInitExpr(EmptyShell Shell) 929 : Expr(CXXScalarValueInitExprClass, Shell) { } 930 931 TypeSourceInfo *getTypeSourceInfo() const { 932 return TypeInfo; 933 } 934 935 SourceLocation getRParenLoc() const { return RParenLoc; } 936 937 virtual SourceRange getSourceRange() const; 938 939 static bool classof(const Stmt *T) { 940 return T->getStmtClass() == CXXScalarValueInitExprClass; 941 } 942 static bool classof(const CXXScalarValueInitExpr *) { return true; } 943 944 // Iterators 945 virtual child_iterator child_begin(); 946 virtual child_iterator child_end(); 947}; 948 949/// CXXNewExpr - A new expression for memory allocation and constructor calls, 950/// e.g: "new CXXNewExpr(foo)". 951class CXXNewExpr : public Expr { 952 // Was the usage ::new, i.e. is the global new to be used? 953 bool GlobalNew : 1; 954 // Is there an initializer? If not, built-ins are uninitialized, else they're 955 // value-initialized. 956 bool Initializer : 1; 957 // Do we allocate an array? If so, the first SubExpr is the size expression. 958 bool Array : 1; 959 // The number of placement new arguments. 960 unsigned NumPlacementArgs : 15; 961 // The number of constructor arguments. This may be 1 even for non-class 962 // types; use the pseudo copy constructor. 963 unsigned NumConstructorArgs : 14; 964 // Contains an optional array size expression, any number of optional 965 // placement arguments, and any number of optional constructor arguments, 966 // in that order. 967 Stmt **SubExprs; 968 // Points to the allocation function used. 969 FunctionDecl *OperatorNew; 970 // Points to the deallocation function used in case of error. May be null. 971 FunctionDecl *OperatorDelete; 972 // Points to the constructor used. Cannot be null if AllocType is a record; 973 // it would still point at the default constructor (even an implicit one). 974 // Must be null for all other types. 975 CXXConstructorDecl *Constructor; 976 977 /// \brief The allocated type-source information, as written in the source. 978 TypeSourceInfo *AllocatedTypeInfo; 979 980 /// \brief If the allocated type was expressed as a parenthesized type-id, 981 /// the source range covering the parenthesized type-id. 982 SourceRange TypeIdParens; 983 984 SourceLocation StartLoc; 985 SourceLocation EndLoc; 986 SourceLocation ConstructorLParen; 987 SourceLocation ConstructorRParen; 988 989 friend class ASTStmtReader; 990public: 991 CXXNewExpr(ASTContext &C, bool globalNew, FunctionDecl *operatorNew, 992 Expr **placementArgs, unsigned numPlaceArgs, 993 SourceRange TypeIdParens, 994 Expr *arraySize, CXXConstructorDecl *constructor, bool initializer, 995 Expr **constructorArgs, unsigned numConsArgs, 996 FunctionDecl *operatorDelete, QualType ty, 997 TypeSourceInfo *AllocatedTypeInfo, 998 SourceLocation startLoc, SourceLocation endLoc, 999 SourceLocation constructorLParen, 1000 SourceLocation constructorRParen); 1001 explicit CXXNewExpr(EmptyShell Shell) 1002 : Expr(CXXNewExprClass, Shell), SubExprs(0) { } 1003 1004 void AllocateArgsArray(ASTContext &C, bool isArray, unsigned numPlaceArgs, 1005 unsigned numConsArgs); 1006 1007 QualType getAllocatedType() const { 1008 assert(getType()->isPointerType()); 1009 return getType()->getAs<PointerType>()->getPointeeType(); 1010 } 1011 1012 TypeSourceInfo *getAllocatedTypeSourceInfo() const { 1013 return AllocatedTypeInfo; 1014 } 1015 1016 FunctionDecl *getOperatorNew() const { return OperatorNew; } 1017 void setOperatorNew(FunctionDecl *D) { OperatorNew = D; } 1018 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 1019 void setOperatorDelete(FunctionDecl *D) { OperatorDelete = D; } 1020 CXXConstructorDecl *getConstructor() const { return Constructor; } 1021 void setConstructor(CXXConstructorDecl *D) { Constructor = D; } 1022 1023 bool isArray() const { return Array; } 1024 Expr *getArraySize() { 1025 return Array ? cast<Expr>(SubExprs[0]) : 0; 1026 } 1027 const Expr *getArraySize() const { 1028 return Array ? cast<Expr>(SubExprs[0]) : 0; 1029 } 1030 1031 unsigned getNumPlacementArgs() const { return NumPlacementArgs; } 1032 Expr *getPlacementArg(unsigned i) { 1033 assert(i < NumPlacementArgs && "Index out of range"); 1034 return cast<Expr>(SubExprs[Array + i]); 1035 } 1036 const Expr *getPlacementArg(unsigned i) const { 1037 assert(i < NumPlacementArgs && "Index out of range"); 1038 return cast<Expr>(SubExprs[Array + i]); 1039 } 1040 1041 bool isParenTypeId() const { return TypeIdParens.isValid(); } 1042 SourceRange getTypeIdParens() const { return TypeIdParens; } 1043 1044 bool isGlobalNew() const { return GlobalNew; } 1045 void setGlobalNew(bool V) { GlobalNew = V; } 1046 bool hasInitializer() const { return Initializer; } 1047 void setHasInitializer(bool V) { Initializer = V; } 1048 1049 unsigned getNumConstructorArgs() const { return NumConstructorArgs; } 1050 Expr *getConstructorArg(unsigned i) { 1051 assert(i < NumConstructorArgs && "Index out of range"); 1052 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 1053 } 1054 const Expr *getConstructorArg(unsigned i) const { 1055 assert(i < NumConstructorArgs && "Index out of range"); 1056 return cast<Expr>(SubExprs[Array + NumPlacementArgs + i]); 1057 } 1058 1059 typedef ExprIterator arg_iterator; 1060 typedef ConstExprIterator const_arg_iterator; 1061 1062 arg_iterator placement_arg_begin() { 1063 return SubExprs + Array; 1064 } 1065 arg_iterator placement_arg_end() { 1066 return SubExprs + Array + getNumPlacementArgs(); 1067 } 1068 const_arg_iterator placement_arg_begin() const { 1069 return SubExprs + Array; 1070 } 1071 const_arg_iterator placement_arg_end() const { 1072 return SubExprs + Array + getNumPlacementArgs(); 1073 } 1074 1075 arg_iterator constructor_arg_begin() { 1076 return SubExprs + Array + getNumPlacementArgs(); 1077 } 1078 arg_iterator constructor_arg_end() { 1079 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 1080 } 1081 const_arg_iterator constructor_arg_begin() const { 1082 return SubExprs + Array + getNumPlacementArgs(); 1083 } 1084 const_arg_iterator constructor_arg_end() const { 1085 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 1086 } 1087 1088 typedef Stmt **raw_arg_iterator; 1089 raw_arg_iterator raw_arg_begin() { return SubExprs; } 1090 raw_arg_iterator raw_arg_end() { 1091 return SubExprs + Array + getNumPlacementArgs() + getNumConstructorArgs(); 1092 } 1093 const_arg_iterator raw_arg_begin() const { return SubExprs; } 1094 const_arg_iterator raw_arg_end() const { return constructor_arg_end(); } 1095 1096 SourceLocation getStartLoc() const { return StartLoc; } 1097 SourceLocation getEndLoc() const { return EndLoc; } 1098 1099 SourceLocation getConstructorLParen() const { return ConstructorLParen; } 1100 SourceLocation getConstructorRParen() const { return ConstructorRParen; } 1101 1102 virtual SourceRange getSourceRange() const { 1103 return SourceRange(StartLoc, EndLoc); 1104 } 1105 1106 static bool classof(const Stmt *T) { 1107 return T->getStmtClass() == CXXNewExprClass; 1108 } 1109 static bool classof(const CXXNewExpr *) { return true; } 1110 1111 // Iterators 1112 virtual child_iterator child_begin(); 1113 virtual child_iterator child_end(); 1114}; 1115 1116/// CXXDeleteExpr - A delete expression for memory deallocation and destructor 1117/// calls, e.g. "delete[] pArray". 1118class CXXDeleteExpr : public Expr { 1119 // Is this a forced global delete, i.e. "::delete"? 1120 bool GlobalDelete : 1; 1121 // Is this the array form of delete, i.e. "delete[]"? 1122 bool ArrayForm : 1; 1123 // ArrayFormAsWritten can be different from ArrayForm if 'delete' is applied 1124 // to pointer-to-array type (ArrayFormAsWritten will be false while ArrayForm 1125 // will be true). 1126 bool ArrayFormAsWritten : 1; 1127 // Points to the operator delete overload that is used. Could be a member. 1128 FunctionDecl *OperatorDelete; 1129 // The pointer expression to be deleted. 1130 Stmt *Argument; 1131 // Location of the expression. 1132 SourceLocation Loc; 1133public: 1134 CXXDeleteExpr(QualType ty, bool globalDelete, bool arrayForm, 1135 bool arrayFormAsWritten, FunctionDecl *operatorDelete, 1136 Expr *arg, SourceLocation loc) 1137 : Expr(CXXDeleteExprClass, ty, false, false), GlobalDelete(globalDelete), 1138 ArrayForm(arrayForm), ArrayFormAsWritten(arrayFormAsWritten), 1139 OperatorDelete(operatorDelete), Argument(arg), Loc(loc) { } 1140 explicit CXXDeleteExpr(EmptyShell Shell) 1141 : Expr(CXXDeleteExprClass, Shell), OperatorDelete(0), Argument(0) { } 1142 1143 bool isGlobalDelete() const { return GlobalDelete; } 1144 bool isArrayForm() const { return ArrayForm; } 1145 bool isArrayFormAsWritten() const { return ArrayFormAsWritten; } 1146 1147 FunctionDecl *getOperatorDelete() const { return OperatorDelete; } 1148 1149 Expr *getArgument() { return cast<Expr>(Argument); } 1150 const Expr *getArgument() const { return cast<Expr>(Argument); } 1151 1152 QualType getDestroyedType() const; 1153 1154 virtual SourceRange getSourceRange() const { 1155 return SourceRange(Loc, Argument->getLocEnd()); 1156 } 1157 1158 static bool classof(const Stmt *T) { 1159 return T->getStmtClass() == CXXDeleteExprClass; 1160 } 1161 static bool classof(const CXXDeleteExpr *) { return true; } 1162 1163 // Iterators 1164 virtual child_iterator child_begin(); 1165 virtual child_iterator child_end(); 1166 1167 friend class ASTStmtReader; 1168}; 1169 1170/// \brief Structure used to store the type being destroyed by a 1171/// pseudo-destructor expression. 1172class PseudoDestructorTypeStorage { 1173 /// \brief Either the type source information or the name of the type, if 1174 /// it couldn't be resolved due to type-dependence. 1175 llvm::PointerUnion<TypeSourceInfo *, IdentifierInfo *> Type; 1176 1177 /// \brief The starting source location of the pseudo-destructor type. 1178 SourceLocation Location; 1179 1180public: 1181 PseudoDestructorTypeStorage() { } 1182 1183 PseudoDestructorTypeStorage(IdentifierInfo *II, SourceLocation Loc) 1184 : Type(II), Location(Loc) { } 1185 1186 PseudoDestructorTypeStorage(TypeSourceInfo *Info); 1187 1188 TypeSourceInfo *getTypeSourceInfo() const { 1189 return Type.dyn_cast<TypeSourceInfo *>(); 1190 } 1191 1192 IdentifierInfo *getIdentifier() const { 1193 return Type.dyn_cast<IdentifierInfo *>(); 1194 } 1195 1196 SourceLocation getLocation() const { return Location; } 1197}; 1198 1199/// \brief Represents a C++ pseudo-destructor (C++ [expr.pseudo]). 1200/// 1201/// A pseudo-destructor is an expression that looks like a member access to a 1202/// destructor of a scalar type, except that scalar types don't have 1203/// destructors. For example: 1204/// 1205/// \code 1206/// typedef int T; 1207/// void f(int *p) { 1208/// p->T::~T(); 1209/// } 1210/// \endcode 1211/// 1212/// Pseudo-destructors typically occur when instantiating templates such as: 1213/// 1214/// \code 1215/// template<typename T> 1216/// void destroy(T* ptr) { 1217/// ptr->T::~T(); 1218/// } 1219/// \endcode 1220/// 1221/// for scalar types. A pseudo-destructor expression has no run-time semantics 1222/// beyond evaluating the base expression. 1223class CXXPseudoDestructorExpr : public Expr { 1224 /// \brief The base expression (that is being destroyed). 1225 Stmt *Base; 1226 1227 /// \brief Whether the operator was an arrow ('->'); otherwise, it was a 1228 /// period ('.'). 1229 bool IsArrow : 1; 1230 1231 /// \brief The location of the '.' or '->' operator. 1232 SourceLocation OperatorLoc; 1233 1234 /// \brief The nested-name-specifier that follows the operator, if present. 1235 NestedNameSpecifier *Qualifier; 1236 1237 /// \brief The source range that covers the nested-name-specifier, if 1238 /// present. 1239 SourceRange QualifierRange; 1240 1241 /// \brief The type that precedes the '::' in a qualified pseudo-destructor 1242 /// expression. 1243 TypeSourceInfo *ScopeType; 1244 1245 /// \brief The location of the '::' in a qualified pseudo-destructor 1246 /// expression. 1247 SourceLocation ColonColonLoc; 1248 1249 /// \brief The location of the '~'. 1250 SourceLocation TildeLoc; 1251 1252 /// \brief The type being destroyed, or its name if we were unable to 1253 /// resolve the name. 1254 PseudoDestructorTypeStorage DestroyedType; 1255 1256public: 1257 CXXPseudoDestructorExpr(ASTContext &Context, 1258 Expr *Base, bool isArrow, SourceLocation OperatorLoc, 1259 NestedNameSpecifier *Qualifier, 1260 SourceRange QualifierRange, 1261 TypeSourceInfo *ScopeType, 1262 SourceLocation ColonColonLoc, 1263 SourceLocation TildeLoc, 1264 PseudoDestructorTypeStorage DestroyedType) 1265 : Expr(CXXPseudoDestructorExprClass, 1266 Context.getPointerType(Context.getFunctionType(Context.VoidTy, 0, 0, 1267 false, 0, false, 1268 false, 0, 0, 1269 FunctionType::ExtInfo())), 1270 /*isTypeDependent=*/(Base->isTypeDependent() || 1271 (DestroyedType.getTypeSourceInfo() && 1272 DestroyedType.getTypeSourceInfo()->getType()->isDependentType())), 1273 /*isValueDependent=*/Base->isValueDependent()), 1274 Base(static_cast<Stmt *>(Base)), IsArrow(isArrow), 1275 OperatorLoc(OperatorLoc), Qualifier(Qualifier), 1276 QualifierRange(QualifierRange), 1277 ScopeType(ScopeType), ColonColonLoc(ColonColonLoc), TildeLoc(TildeLoc), 1278 DestroyedType(DestroyedType) { } 1279 1280 explicit CXXPseudoDestructorExpr(EmptyShell Shell) 1281 : Expr(CXXPseudoDestructorExprClass, Shell), 1282 Base(0), IsArrow(false), Qualifier(0), ScopeType(0) { } 1283 1284 void setBase(Expr *E) { Base = E; } 1285 Expr *getBase() const { return cast<Expr>(Base); } 1286 1287 /// \brief Determines whether this member expression actually had 1288 /// a C++ nested-name-specifier prior to the name of the member, e.g., 1289 /// x->Base::foo. 1290 bool hasQualifier() const { return Qualifier != 0; } 1291 1292 /// \brief If the member name was qualified, retrieves the source range of 1293 /// the nested-name-specifier that precedes the member name. Otherwise, 1294 /// returns an empty source range. 1295 SourceRange getQualifierRange() const { return QualifierRange; } 1296 void setQualifierRange(SourceRange R) { QualifierRange = R; } 1297 1298 /// \brief If the member name was qualified, retrieves the 1299 /// nested-name-specifier that precedes the member name. Otherwise, returns 1300 /// NULL. 1301 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1302 void setQualifier(NestedNameSpecifier *NNS) { Qualifier = NNS; } 1303 1304 /// \brief Determine whether this pseudo-destructor expression was written 1305 /// using an '->' (otherwise, it used a '.'). 1306 bool isArrow() const { return IsArrow; } 1307 void setArrow(bool A) { IsArrow = A; } 1308 1309 /// \brief Retrieve the location of the '.' or '->' operator. 1310 SourceLocation getOperatorLoc() const { return OperatorLoc; } 1311 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 1312 1313 /// \brief Retrieve the scope type in a qualified pseudo-destructor 1314 /// expression. 1315 /// 1316 /// Pseudo-destructor expressions can have extra qualification within them 1317 /// that is not part of the nested-name-specifier, e.g., \c p->T::~T(). 1318 /// Here, if the object type of the expression is (or may be) a scalar type, 1319 /// \p T may also be a scalar type and, therefore, cannot be part of a 1320 /// nested-name-specifier. It is stored as the "scope type" of the pseudo- 1321 /// destructor expression. 1322 TypeSourceInfo *getScopeTypeInfo() const { return ScopeType; } 1323 void setScopeTypeInfo(TypeSourceInfo *Info) { ScopeType = Info; } 1324 1325 /// \brief Retrieve the location of the '::' in a qualified pseudo-destructor 1326 /// expression. 1327 SourceLocation getColonColonLoc() const { return ColonColonLoc; } 1328 void setColonColonLoc(SourceLocation L) { ColonColonLoc = L; } 1329 1330 /// \brief Retrieve the location of the '~'. 1331 SourceLocation getTildeLoc() const { return TildeLoc; } 1332 void setTildeLoc(SourceLocation L) { TildeLoc = L; } 1333 1334 /// \brief Retrieve the source location information for the type 1335 /// being destroyed. 1336 /// 1337 /// This type-source information is available for non-dependent 1338 /// pseudo-destructor expressions and some dependent pseudo-destructor 1339 /// expressions. Returns NULL if we only have the identifier for a 1340 /// dependent pseudo-destructor expression. 1341 TypeSourceInfo *getDestroyedTypeInfo() const { 1342 return DestroyedType.getTypeSourceInfo(); 1343 } 1344 1345 /// \brief In a dependent pseudo-destructor expression for which we do not 1346 /// have full type information on the destroyed type, provides the name 1347 /// of the destroyed type. 1348 IdentifierInfo *getDestroyedTypeIdentifier() const { 1349 return DestroyedType.getIdentifier(); 1350 } 1351 1352 /// \brief Retrieve the type being destroyed. 1353 QualType getDestroyedType() const; 1354 1355 /// \brief Retrieve the starting location of the type being destroyed. 1356 SourceLocation getDestroyedTypeLoc() const { 1357 return DestroyedType.getLocation(); 1358 } 1359 1360 /// \brief Set the name of destroyed type for a dependent pseudo-destructor 1361 /// expression. 1362 void setDestroyedType(IdentifierInfo *II, SourceLocation Loc) { 1363 DestroyedType = PseudoDestructorTypeStorage(II, Loc); 1364 } 1365 1366 /// \brief Set the destroyed type. 1367 void setDestroyedType(TypeSourceInfo *Info) { 1368 DestroyedType = PseudoDestructorTypeStorage(Info); 1369 } 1370 1371 virtual SourceRange getSourceRange() const; 1372 1373 static bool classof(const Stmt *T) { 1374 return T->getStmtClass() == CXXPseudoDestructorExprClass; 1375 } 1376 static bool classof(const CXXPseudoDestructorExpr *) { return true; } 1377 1378 // Iterators 1379 virtual child_iterator child_begin(); 1380 virtual child_iterator child_end(); 1381}; 1382 1383/// UnaryTypeTraitExpr - A GCC or MS unary type trait, as used in the 1384/// implementation of TR1/C++0x type trait templates. 1385/// Example: 1386/// __is_pod(int) == true 1387/// __is_enum(std::string) == false 1388class UnaryTypeTraitExpr : public Expr { 1389 /// UTT - The trait. A UnaryTypeTrait enum in MSVC compat unsigned. 1390 unsigned UTT : 31; 1391 /// The value of the type trait. Unspecified if dependent. 1392 bool Value : 1; 1393 1394 /// Loc - The location of the type trait keyword. 1395 SourceLocation Loc; 1396 1397 /// RParen - The location of the closing paren. 1398 SourceLocation RParen; 1399 1400 /// The type being queried. 1401 TypeSourceInfo *QueriedType; 1402 1403public: 1404 UnaryTypeTraitExpr(SourceLocation loc, UnaryTypeTrait utt, 1405 TypeSourceInfo *queried, bool value, 1406 SourceLocation rparen, QualType ty) 1407 : Expr(UnaryTypeTraitExprClass, ty, false, 1408 queried->getType()->isDependentType()), 1409 UTT(utt), Value(value), Loc(loc), RParen(rparen), QueriedType(queried) { } 1410 1411 explicit UnaryTypeTraitExpr(EmptyShell Empty) 1412 : Expr(UnaryTypeTraitExprClass, Empty), UTT(0), Value(false), 1413 QueriedType() { } 1414 1415 virtual SourceRange getSourceRange() const { return SourceRange(Loc, RParen);} 1416 1417 UnaryTypeTrait getTrait() const { return static_cast<UnaryTypeTrait>(UTT); } 1418 1419 QualType getQueriedType() const { return QueriedType->getType(); } 1420 1421 TypeSourceInfo *getQueriedTypeSourceInfo() const { return QueriedType; } 1422 1423 bool getValue() const { return Value; } 1424 1425 static bool classof(const Stmt *T) { 1426 return T->getStmtClass() == UnaryTypeTraitExprClass; 1427 } 1428 static bool classof(const UnaryTypeTraitExpr *) { return true; } 1429 1430 // Iterators 1431 virtual child_iterator child_begin(); 1432 virtual child_iterator child_end(); 1433 1434 friend class ASTStmtReader; 1435}; 1436 1437/// \brief A reference to an overloaded function set, either an 1438/// \t UnresolvedLookupExpr or an \t UnresolvedMemberExpr. 1439class OverloadExpr : public Expr { 1440 /// The results. These are undesugared, which is to say, they may 1441 /// include UsingShadowDecls. Access is relative to the naming 1442 /// class. 1443 // FIXME: Allocate this data after the OverloadExpr subclass. 1444 DeclAccessPair *Results; 1445 unsigned NumResults; 1446 1447 /// The common name of these declarations. 1448 DeclarationNameInfo NameInfo; 1449 1450 /// The scope specifier, if any. 1451 NestedNameSpecifier *Qualifier; 1452 1453 /// The source range of the scope specifier. 1454 SourceRange QualifierRange; 1455 1456protected: 1457 /// True if the name was a template-id. 1458 bool HasExplicitTemplateArgs; 1459 1460 OverloadExpr(StmtClass K, ASTContext &C, QualType T, bool Dependent, 1461 NestedNameSpecifier *Qualifier, SourceRange QRange, 1462 const DeclarationNameInfo &NameInfo, 1463 bool HasTemplateArgs, 1464 UnresolvedSetIterator Begin, UnresolvedSetIterator End); 1465 1466 OverloadExpr(StmtClass K, EmptyShell Empty) 1467 : Expr(K, Empty), Results(0), NumResults(0), 1468 Qualifier(0), HasExplicitTemplateArgs(false) { } 1469 1470public: 1471 /// Computes whether an unresolved lookup on the given declarations 1472 /// and optional template arguments is type- and value-dependent. 1473 static bool ComputeDependence(UnresolvedSetIterator Begin, 1474 UnresolvedSetIterator End, 1475 const TemplateArgumentListInfo *Args); 1476 1477 struct FindResult { 1478 OverloadExpr *Expression; 1479 bool IsAddressOfOperand; 1480 bool HasFormOfMemberPointer; 1481 }; 1482 1483 /// Finds the overloaded expression in the given expression of 1484 /// OverloadTy. 1485 /// 1486 /// \return the expression (which must be there) and true if it has 1487 /// the particular form of a member pointer expression 1488 static FindResult find(Expr *E) { 1489 assert(E->getType()->isSpecificBuiltinType(BuiltinType::Overload)); 1490 1491 FindResult Result; 1492 1493 E = E->IgnoreParens(); 1494 if (isa<UnaryOperator>(E)) { 1495 assert(cast<UnaryOperator>(E)->getOpcode() == UO_AddrOf); 1496 E = cast<UnaryOperator>(E)->getSubExpr(); 1497 OverloadExpr *Ovl = cast<OverloadExpr>(E->IgnoreParens()); 1498 1499 Result.HasFormOfMemberPointer = (E == Ovl && Ovl->getQualifier()); 1500 Result.IsAddressOfOperand = true; 1501 Result.Expression = Ovl; 1502 } else { 1503 Result.HasFormOfMemberPointer = false; 1504 Result.IsAddressOfOperand = false; 1505 Result.Expression = cast<OverloadExpr>(E); 1506 } 1507 1508 return Result; 1509 } 1510 1511 /// Gets the naming class of this lookup, if any. 1512 CXXRecordDecl *getNamingClass() const; 1513 1514 typedef UnresolvedSetImpl::iterator decls_iterator; 1515 decls_iterator decls_begin() const { return UnresolvedSetIterator(Results); } 1516 decls_iterator decls_end() const { 1517 return UnresolvedSetIterator(Results + NumResults); 1518 } 1519 1520 void initializeResults(ASTContext &C, 1521 UnresolvedSetIterator Begin,UnresolvedSetIterator End); 1522 1523 /// Gets the number of declarations in the unresolved set. 1524 unsigned getNumDecls() const { return NumResults; } 1525 1526 /// Gets the full name info. 1527 const DeclarationNameInfo &getNameInfo() const { return NameInfo; } 1528 void setNameInfo(const DeclarationNameInfo &N) { NameInfo = N; } 1529 1530 /// Gets the name looked up. 1531 DeclarationName getName() const { return NameInfo.getName(); } 1532 void setName(DeclarationName N) { NameInfo.setName(N); } 1533 1534 /// Gets the location of the name. 1535 SourceLocation getNameLoc() const { return NameInfo.getLoc(); } 1536 void setNameLoc(SourceLocation Loc) { NameInfo.setLoc(Loc); } 1537 1538 /// Fetches the nested-name qualifier, if one was given. 1539 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1540 void setQualifier(NestedNameSpecifier *NNS) { Qualifier = NNS; } 1541 1542 /// Fetches the range of the nested-name qualifier. 1543 SourceRange getQualifierRange() const { return QualifierRange; } 1544 void setQualifierRange(SourceRange R) { QualifierRange = R; } 1545 1546 /// \brief Determines whether this expression had an explicit 1547 /// template argument list, e.g. f<int>. 1548 bool hasExplicitTemplateArgs() const { return HasExplicitTemplateArgs; } 1549 1550 ExplicitTemplateArgumentList &getExplicitTemplateArgs(); // defined far below 1551 1552 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1553 return const_cast<OverloadExpr*>(this)->getExplicitTemplateArgs(); 1554 } 1555 1556 /// \brief Retrieves the optional explicit template arguments. 1557 /// This points to the same data as getExplicitTemplateArgs(), but 1558 /// returns null if there are no explicit template arguments. 1559 const ExplicitTemplateArgumentList *getOptionalExplicitTemplateArgs() { 1560 if (!hasExplicitTemplateArgs()) return 0; 1561 return &getExplicitTemplateArgs(); 1562 } 1563 1564 static bool classof(const Stmt *T) { 1565 return T->getStmtClass() == UnresolvedLookupExprClass || 1566 T->getStmtClass() == UnresolvedMemberExprClass; 1567 } 1568 static bool classof(const OverloadExpr *) { return true; } 1569 1570 friend class ASTStmtReader; 1571 friend class ASTStmtWriter; 1572}; 1573 1574/// \brief A reference to a name which we were able to look up during 1575/// parsing but could not resolve to a specific declaration. This 1576/// arises in several ways: 1577/// * we might be waiting for argument-dependent lookup 1578/// * the name might resolve to an overloaded function 1579/// and eventually: 1580/// * the lookup might have included a function template 1581/// These never include UnresolvedUsingValueDecls, which are always 1582/// class members and therefore appear only in 1583/// UnresolvedMemberLookupExprs. 1584class UnresolvedLookupExpr : public OverloadExpr { 1585 /// True if these lookup results should be extended by 1586 /// argument-dependent lookup if this is the operand of a function 1587 /// call. 1588 bool RequiresADL; 1589 1590 /// True if these lookup results are overloaded. This is pretty 1591 /// trivially rederivable if we urgently need to kill this field. 1592 bool Overloaded; 1593 1594 /// The naming class (C++ [class.access.base]p5) of the lookup, if 1595 /// any. This can generally be recalculated from the context chain, 1596 /// but that can be fairly expensive for unqualified lookups. If we 1597 /// want to improve memory use here, this could go in a union 1598 /// against the qualified-lookup bits. 1599 CXXRecordDecl *NamingClass; 1600 1601 UnresolvedLookupExpr(ASTContext &C, QualType T, bool Dependent, 1602 CXXRecordDecl *NamingClass, 1603 NestedNameSpecifier *Qualifier, SourceRange QRange, 1604 const DeclarationNameInfo &NameInfo, 1605 bool RequiresADL, bool Overloaded, bool HasTemplateArgs, 1606 UnresolvedSetIterator Begin, UnresolvedSetIterator End) 1607 : OverloadExpr(UnresolvedLookupExprClass, C, T, Dependent, Qualifier, 1608 QRange, NameInfo, HasTemplateArgs, Begin, End), 1609 RequiresADL(RequiresADL), Overloaded(Overloaded), NamingClass(NamingClass) 1610 {} 1611 1612 UnresolvedLookupExpr(EmptyShell Empty) 1613 : OverloadExpr(UnresolvedLookupExprClass, Empty), 1614 RequiresADL(false), Overloaded(false), NamingClass(0) 1615 {} 1616 1617public: 1618 static UnresolvedLookupExpr *Create(ASTContext &C, 1619 bool Dependent, 1620 CXXRecordDecl *NamingClass, 1621 NestedNameSpecifier *Qualifier, 1622 SourceRange QualifierRange, 1623 const DeclarationNameInfo &NameInfo, 1624 bool ADL, bool Overloaded, 1625 UnresolvedSetIterator Begin, 1626 UnresolvedSetIterator End) { 1627 return new(C) UnresolvedLookupExpr(C, 1628 Dependent ? C.DependentTy : C.OverloadTy, 1629 Dependent, NamingClass, 1630 Qualifier, QualifierRange, NameInfo, 1631 ADL, Overloaded, false, 1632 Begin, End); 1633 } 1634 1635 static UnresolvedLookupExpr *Create(ASTContext &C, 1636 bool Dependent, 1637 CXXRecordDecl *NamingClass, 1638 NestedNameSpecifier *Qualifier, 1639 SourceRange QualifierRange, 1640 const DeclarationNameInfo &NameInfo, 1641 bool ADL, 1642 const TemplateArgumentListInfo &Args, 1643 UnresolvedSetIterator Begin, 1644 UnresolvedSetIterator End); 1645 1646 static UnresolvedLookupExpr *CreateEmpty(ASTContext &C, 1647 unsigned NumTemplateArgs); 1648 1649 /// True if this declaration should be extended by 1650 /// argument-dependent lookup. 1651 bool requiresADL() const { return RequiresADL; } 1652 void setRequiresADL(bool V) { RequiresADL = V; } 1653 1654 /// True if this lookup is overloaded. 1655 bool isOverloaded() const { return Overloaded; } 1656 void setOverloaded(bool V) { Overloaded = V; } 1657 1658 /// Gets the 'naming class' (in the sense of C++0x 1659 /// [class.access.base]p5) of the lookup. This is the scope 1660 /// that was looked in to find these results. 1661 CXXRecordDecl *getNamingClass() const { return NamingClass; } 1662 void setNamingClass(CXXRecordDecl *D) { NamingClass = D; } 1663 1664 // Note that, inconsistently with the explicit-template-argument AST 1665 // nodes, users are *forbidden* from calling these methods on objects 1666 // without explicit template arguments. 1667 1668 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 1669 assert(hasExplicitTemplateArgs()); 1670 return *reinterpret_cast<ExplicitTemplateArgumentList*>(this + 1); 1671 } 1672 1673 /// Gets a reference to the explicit template argument list. 1674 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1675 assert(hasExplicitTemplateArgs()); 1676 return *reinterpret_cast<const ExplicitTemplateArgumentList*>(this + 1); 1677 } 1678 1679 /// \brief Retrieves the optional explicit template arguments. 1680 /// This points to the same data as getExplicitTemplateArgs(), but 1681 /// returns null if there are no explicit template arguments. 1682 const ExplicitTemplateArgumentList *getOptionalExplicitTemplateArgs() { 1683 if (!hasExplicitTemplateArgs()) return 0; 1684 return &getExplicitTemplateArgs(); 1685 } 1686 1687 /// \brief Copies the template arguments (if present) into the given 1688 /// structure. 1689 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1690 getExplicitTemplateArgs().copyInto(List); 1691 } 1692 1693 SourceLocation getLAngleLoc() const { 1694 return getExplicitTemplateArgs().LAngleLoc; 1695 } 1696 1697 SourceLocation getRAngleLoc() const { 1698 return getExplicitTemplateArgs().RAngleLoc; 1699 } 1700 1701 TemplateArgumentLoc const *getTemplateArgs() const { 1702 return getExplicitTemplateArgs().getTemplateArgs(); 1703 } 1704 1705 unsigned getNumTemplateArgs() const { 1706 return getExplicitTemplateArgs().NumTemplateArgs; 1707 } 1708 1709 virtual SourceRange getSourceRange() const { 1710 SourceRange Range(getNameInfo().getSourceRange()); 1711 if (getQualifier()) Range.setBegin(getQualifierRange().getBegin()); 1712 if (hasExplicitTemplateArgs()) Range.setEnd(getRAngleLoc()); 1713 return Range; 1714 } 1715 1716 virtual StmtIterator child_begin(); 1717 virtual StmtIterator child_end(); 1718 1719 static bool classof(const Stmt *T) { 1720 return T->getStmtClass() == UnresolvedLookupExprClass; 1721 } 1722 static bool classof(const UnresolvedLookupExpr *) { return true; } 1723}; 1724 1725/// \brief A qualified reference to a name whose declaration cannot 1726/// yet be resolved. 1727/// 1728/// DependentScopeDeclRefExpr is similar to DeclRefExpr in that 1729/// it expresses a reference to a declaration such as 1730/// X<T>::value. The difference, however, is that an 1731/// DependentScopeDeclRefExpr node is used only within C++ templates when 1732/// the qualification (e.g., X<T>::) refers to a dependent type. In 1733/// this case, X<T>::value cannot resolve to a declaration because the 1734/// declaration will differ from on instantiation of X<T> to the 1735/// next. Therefore, DependentScopeDeclRefExpr keeps track of the 1736/// qualifier (X<T>::) and the name of the entity being referenced 1737/// ("value"). Such expressions will instantiate to a DeclRefExpr once the 1738/// declaration can be found. 1739class DependentScopeDeclRefExpr : public Expr { 1740 /// The name of the entity we will be referencing. 1741 DeclarationNameInfo NameInfo; 1742 1743 /// QualifierRange - The source range that covers the 1744 /// nested-name-specifier. 1745 SourceRange QualifierRange; 1746 1747 /// \brief The nested-name-specifier that qualifies this unresolved 1748 /// declaration name. 1749 NestedNameSpecifier *Qualifier; 1750 1751 /// \brief Whether the name includes explicit template arguments. 1752 bool HasExplicitTemplateArgs; 1753 1754 DependentScopeDeclRefExpr(QualType T, 1755 NestedNameSpecifier *Qualifier, 1756 SourceRange QualifierRange, 1757 const DeclarationNameInfo &NameInfo, 1758 bool HasExplicitTemplateArgs) 1759 : Expr(DependentScopeDeclRefExprClass, T, true, true), 1760 NameInfo(NameInfo), QualifierRange(QualifierRange), Qualifier(Qualifier), 1761 HasExplicitTemplateArgs(HasExplicitTemplateArgs) 1762 {} 1763 1764public: 1765 static DependentScopeDeclRefExpr *Create(ASTContext &C, 1766 NestedNameSpecifier *Qualifier, 1767 SourceRange QualifierRange, 1768 const DeclarationNameInfo &NameInfo, 1769 const TemplateArgumentListInfo *TemplateArgs = 0); 1770 1771 static DependentScopeDeclRefExpr *CreateEmpty(ASTContext &C, 1772 unsigned NumTemplateArgs); 1773 1774 /// \brief Retrieve the name that this expression refers to. 1775 const DeclarationNameInfo &getNameInfo() const { return NameInfo; } 1776 void setNameInfo(const DeclarationNameInfo &N) { NameInfo = N; } 1777 1778 /// \brief Retrieve the name that this expression refers to. 1779 DeclarationName getDeclName() const { return NameInfo.getName(); } 1780 void setDeclName(DeclarationName N) { NameInfo.setName(N); } 1781 1782 /// \brief Retrieve the location of the name within the expression. 1783 SourceLocation getLocation() const { return NameInfo.getLoc(); } 1784 void setLocation(SourceLocation L) { NameInfo.setLoc(L); } 1785 1786 /// \brief Retrieve the source range of the nested-name-specifier. 1787 SourceRange getQualifierRange() const { return QualifierRange; } 1788 void setQualifierRange(SourceRange R) { QualifierRange = R; } 1789 1790 /// \brief Retrieve the nested-name-specifier that qualifies this 1791 /// declaration. 1792 NestedNameSpecifier *getQualifier() const { return Qualifier; } 1793 void setQualifier(NestedNameSpecifier *NNS) { Qualifier = NNS; } 1794 1795 /// Determines whether this lookup had explicit template arguments. 1796 bool hasExplicitTemplateArgs() const { return HasExplicitTemplateArgs; } 1797 1798 // Note that, inconsistently with the explicit-template-argument AST 1799 // nodes, users are *forbidden* from calling these methods on objects 1800 // without explicit template arguments. 1801 1802 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 1803 assert(hasExplicitTemplateArgs()); 1804 return *reinterpret_cast<ExplicitTemplateArgumentList*>(this + 1); 1805 } 1806 1807 /// Gets a reference to the explicit template argument list. 1808 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1809 assert(hasExplicitTemplateArgs()); 1810 return *reinterpret_cast<const ExplicitTemplateArgumentList*>(this + 1); 1811 } 1812 1813 /// \brief Retrieves the optional explicit template arguments. 1814 /// This points to the same data as getExplicitTemplateArgs(), but 1815 /// returns null if there are no explicit template arguments. 1816 const ExplicitTemplateArgumentList *getOptionalExplicitTemplateArgs() { 1817 if (!hasExplicitTemplateArgs()) return 0; 1818 return &getExplicitTemplateArgs(); 1819 } 1820 1821 /// \brief Copies the template arguments (if present) into the given 1822 /// structure. 1823 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1824 getExplicitTemplateArgs().copyInto(List); 1825 } 1826 1827 SourceLocation getLAngleLoc() const { 1828 return getExplicitTemplateArgs().LAngleLoc; 1829 } 1830 1831 SourceLocation getRAngleLoc() const { 1832 return getExplicitTemplateArgs().RAngleLoc; 1833 } 1834 1835 TemplateArgumentLoc const *getTemplateArgs() const { 1836 return getExplicitTemplateArgs().getTemplateArgs(); 1837 } 1838 1839 unsigned getNumTemplateArgs() const { 1840 return getExplicitTemplateArgs().NumTemplateArgs; 1841 } 1842 1843 virtual SourceRange getSourceRange() const { 1844 SourceRange Range(QualifierRange.getBegin(), getLocation()); 1845 if (hasExplicitTemplateArgs()) 1846 Range.setEnd(getRAngleLoc()); 1847 return Range; 1848 } 1849 1850 static bool classof(const Stmt *T) { 1851 return T->getStmtClass() == DependentScopeDeclRefExprClass; 1852 } 1853 static bool classof(const DependentScopeDeclRefExpr *) { return true; } 1854 1855 virtual StmtIterator child_begin(); 1856 virtual StmtIterator child_end(); 1857 1858 friend class ASTStmtReader; 1859 friend class ASTStmtWriter; 1860}; 1861 1862class CXXExprWithTemporaries : public Expr { 1863 Stmt *SubExpr; 1864 1865 CXXTemporary **Temps; 1866 unsigned NumTemps; 1867 1868 CXXExprWithTemporaries(ASTContext &C, Expr *SubExpr, CXXTemporary **Temps, 1869 unsigned NumTemps); 1870 1871public: 1872 CXXExprWithTemporaries(EmptyShell Empty) 1873 : Expr(CXXExprWithTemporariesClass, Empty), 1874 SubExpr(0), Temps(0), NumTemps(0) {} 1875 1876 static CXXExprWithTemporaries *Create(ASTContext &C, Expr *SubExpr, 1877 CXXTemporary **Temps, 1878 unsigned NumTemps); 1879 1880 unsigned getNumTemporaries() const { return NumTemps; } 1881 void setNumTemporaries(ASTContext &C, unsigned N); 1882 1883 CXXTemporary *getTemporary(unsigned i) { 1884 assert(i < NumTemps && "Index out of range"); 1885 return Temps[i]; 1886 } 1887 const CXXTemporary *getTemporary(unsigned i) const { 1888 return const_cast<CXXExprWithTemporaries*>(this)->getTemporary(i); 1889 } 1890 void setTemporary(unsigned i, CXXTemporary *T) { 1891 assert(i < NumTemps && "Index out of range"); 1892 Temps[i] = T; 1893 } 1894 1895 Expr *getSubExpr() { return cast<Expr>(SubExpr); } 1896 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } 1897 void setSubExpr(Expr *E) { SubExpr = E; } 1898 1899 virtual SourceRange getSourceRange() const { 1900 return SubExpr->getSourceRange(); 1901 } 1902 1903 // Implement isa/cast/dyncast/etc. 1904 static bool classof(const Stmt *T) { 1905 return T->getStmtClass() == CXXExprWithTemporariesClass; 1906 } 1907 static bool classof(const CXXExprWithTemporaries *) { return true; } 1908 1909 // Iterators 1910 virtual child_iterator child_begin(); 1911 virtual child_iterator child_end(); 1912}; 1913 1914/// \brief Describes an explicit type conversion that uses functional 1915/// notion but could not be resolved because one or more arguments are 1916/// type-dependent. 1917/// 1918/// The explicit type conversions expressed by 1919/// CXXUnresolvedConstructExpr have the form \c T(a1, a2, ..., aN), 1920/// where \c T is some type and \c a1, a2, ..., aN are values, and 1921/// either \C T is a dependent type or one or more of the \c a's is 1922/// type-dependent. For example, this would occur in a template such 1923/// as: 1924/// 1925/// \code 1926/// template<typename T, typename A1> 1927/// inline T make_a(const A1& a1) { 1928/// return T(a1); 1929/// } 1930/// \endcode 1931/// 1932/// When the returned expression is instantiated, it may resolve to a 1933/// constructor call, conversion function call, or some kind of type 1934/// conversion. 1935class CXXUnresolvedConstructExpr : public Expr { 1936 /// \brief The type being constructed. 1937 TypeSourceInfo *Type; 1938 1939 /// \brief The location of the left parentheses ('('). 1940 SourceLocation LParenLoc; 1941 1942 /// \brief The location of the right parentheses (')'). 1943 SourceLocation RParenLoc; 1944 1945 /// \brief The number of arguments used to construct the type. 1946 unsigned NumArgs; 1947 1948 CXXUnresolvedConstructExpr(TypeSourceInfo *Type, 1949 SourceLocation LParenLoc, 1950 Expr **Args, 1951 unsigned NumArgs, 1952 SourceLocation RParenLoc); 1953 1954 CXXUnresolvedConstructExpr(EmptyShell Empty, unsigned NumArgs) 1955 : Expr(CXXUnresolvedConstructExprClass, Empty), Type(), NumArgs(NumArgs) { } 1956 1957 friend class ASTStmtReader; 1958 1959public: 1960 static CXXUnresolvedConstructExpr *Create(ASTContext &C, 1961 TypeSourceInfo *Type, 1962 SourceLocation LParenLoc, 1963 Expr **Args, 1964 unsigned NumArgs, 1965 SourceLocation RParenLoc); 1966 1967 static CXXUnresolvedConstructExpr *CreateEmpty(ASTContext &C, 1968 unsigned NumArgs); 1969 1970 /// \brief Retrieve the type that is being constructed, as specified 1971 /// in the source code. 1972 QualType getTypeAsWritten() const { return Type->getType(); } 1973 1974 /// \brief Retrieve the type source information for the type being 1975 /// constructed. 1976 TypeSourceInfo *getTypeSourceInfo() const { return Type; } 1977 1978 /// \brief Retrieve the location of the left parentheses ('(') that 1979 /// precedes the argument list. 1980 SourceLocation getLParenLoc() const { return LParenLoc; } 1981 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 1982 1983 /// \brief Retrieve the location of the right parentheses (')') that 1984 /// follows the argument list. 1985 SourceLocation getRParenLoc() const { return RParenLoc; } 1986 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1987 1988 /// \brief Retrieve the number of arguments. 1989 unsigned arg_size() const { return NumArgs; } 1990 1991 typedef Expr** arg_iterator; 1992 arg_iterator arg_begin() { return reinterpret_cast<Expr**>(this + 1); } 1993 arg_iterator arg_end() { return arg_begin() + NumArgs; } 1994 1995 typedef const Expr* const * const_arg_iterator; 1996 const_arg_iterator arg_begin() const { 1997 return reinterpret_cast<const Expr* const *>(this + 1); 1998 } 1999 const_arg_iterator arg_end() const { 2000 return arg_begin() + NumArgs; 2001 } 2002 2003 Expr *getArg(unsigned I) { 2004 assert(I < NumArgs && "Argument index out-of-range"); 2005 return *(arg_begin() + I); 2006 } 2007 2008 const Expr *getArg(unsigned I) const { 2009 assert(I < NumArgs && "Argument index out-of-range"); 2010 return *(arg_begin() + I); 2011 } 2012 2013 void setArg(unsigned I, Expr *E) { 2014 assert(I < NumArgs && "Argument index out-of-range"); 2015 *(arg_begin() + I) = E; 2016 } 2017 2018 virtual SourceRange getSourceRange() const; 2019 2020 static bool classof(const Stmt *T) { 2021 return T->getStmtClass() == CXXUnresolvedConstructExprClass; 2022 } 2023 static bool classof(const CXXUnresolvedConstructExpr *) { return true; } 2024 2025 // Iterators 2026 virtual child_iterator child_begin(); 2027 virtual child_iterator child_end(); 2028}; 2029 2030/// \brief Represents a C++ member access expression where the actual 2031/// member referenced could not be resolved because the base 2032/// expression or the member name was dependent. 2033/// 2034/// Like UnresolvedMemberExprs, these can be either implicit or 2035/// explicit accesses. It is only possible to get one of these with 2036/// an implicit access if a qualifier is provided. 2037class CXXDependentScopeMemberExpr : public Expr { 2038 /// \brief The expression for the base pointer or class reference, 2039 /// e.g., the \c x in x.f. Can be null in implicit accesses. 2040 Stmt *Base; 2041 2042 /// \brief The type of the base expression. Never null, even for 2043 /// implicit accesses. 2044 QualType BaseType; 2045 2046 /// \brief Whether this member expression used the '->' operator or 2047 /// the '.' operator. 2048 bool IsArrow : 1; 2049 2050 /// \brief Whether this member expression has explicitly-specified template 2051 /// arguments. 2052 bool HasExplicitTemplateArgs : 1; 2053 2054 /// \brief The location of the '->' or '.' operator. 2055 SourceLocation OperatorLoc; 2056 2057 /// \brief The nested-name-specifier that precedes the member name, if any. 2058 NestedNameSpecifier *Qualifier; 2059 2060 /// \brief The source range covering the nested name specifier. 2061 SourceRange QualifierRange; 2062 2063 /// \brief In a qualified member access expression such as t->Base::f, this 2064 /// member stores the resolves of name lookup in the context of the member 2065 /// access expression, to be used at instantiation time. 2066 /// 2067 /// FIXME: This member, along with the Qualifier and QualifierRange, could 2068 /// be stuck into a structure that is optionally allocated at the end of 2069 /// the CXXDependentScopeMemberExpr, to save space in the common case. 2070 NamedDecl *FirstQualifierFoundInScope; 2071 2072 /// \brief The member to which this member expression refers, which 2073 /// can be name, overloaded operator, or destructor. 2074 /// FIXME: could also be a template-id 2075 DeclarationNameInfo MemberNameInfo; 2076 2077 CXXDependentScopeMemberExpr(ASTContext &C, 2078 Expr *Base, QualType BaseType, bool IsArrow, 2079 SourceLocation OperatorLoc, 2080 NestedNameSpecifier *Qualifier, 2081 SourceRange QualifierRange, 2082 NamedDecl *FirstQualifierFoundInScope, 2083 DeclarationNameInfo MemberNameInfo, 2084 const TemplateArgumentListInfo *TemplateArgs); 2085 2086public: 2087 CXXDependentScopeMemberExpr(ASTContext &C, 2088 Expr *Base, QualType BaseType, 2089 bool IsArrow, 2090 SourceLocation OperatorLoc, 2091 NestedNameSpecifier *Qualifier, 2092 SourceRange QualifierRange, 2093 NamedDecl *FirstQualifierFoundInScope, 2094 DeclarationNameInfo MemberNameInfo) 2095 : Expr(CXXDependentScopeMemberExprClass, C.DependentTy, true, true), 2096 Base(Base), BaseType(BaseType), IsArrow(IsArrow), 2097 HasExplicitTemplateArgs(false), OperatorLoc(OperatorLoc), 2098 Qualifier(Qualifier), QualifierRange(QualifierRange), 2099 FirstQualifierFoundInScope(FirstQualifierFoundInScope), 2100 MemberNameInfo(MemberNameInfo) { } 2101 2102 static CXXDependentScopeMemberExpr * 2103 Create(ASTContext &C, 2104 Expr *Base, QualType BaseType, bool IsArrow, 2105 SourceLocation OperatorLoc, 2106 NestedNameSpecifier *Qualifier, 2107 SourceRange QualifierRange, 2108 NamedDecl *FirstQualifierFoundInScope, 2109 DeclarationNameInfo MemberNameInfo, 2110 const TemplateArgumentListInfo *TemplateArgs); 2111 2112 static CXXDependentScopeMemberExpr * 2113 CreateEmpty(ASTContext &C, unsigned NumTemplateArgs); 2114 2115 /// \brief True if this is an implicit access, i.e. one in which the 2116 /// member being accessed was not written in the source. The source 2117 /// location of the operator is invalid in this case. 2118 bool isImplicitAccess() const { return Base == 0; } 2119 2120 /// \brief Retrieve the base object of this member expressions, 2121 /// e.g., the \c x in \c x.m. 2122 Expr *getBase() const { 2123 assert(!isImplicitAccess()); 2124 return cast<Expr>(Base); 2125 } 2126 void setBase(Expr *E) { Base = E; } 2127 2128 QualType getBaseType() const { return BaseType; } 2129 void setBaseType(QualType T) { BaseType = T; } 2130 2131 /// \brief Determine whether this member expression used the '->' 2132 /// operator; otherwise, it used the '.' operator. 2133 bool isArrow() const { return IsArrow; } 2134 void setArrow(bool A) { IsArrow = A; } 2135 2136 /// \brief Retrieve the location of the '->' or '.' operator. 2137 SourceLocation getOperatorLoc() const { return OperatorLoc; } 2138 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 2139 2140 /// \brief Retrieve the nested-name-specifier that qualifies the member 2141 /// name. 2142 NestedNameSpecifier *getQualifier() const { return Qualifier; } 2143 void setQualifier(NestedNameSpecifier *NNS) { Qualifier = NNS; } 2144 2145 /// \brief Retrieve the source range covering the nested-name-specifier 2146 /// that qualifies the member name. 2147 SourceRange getQualifierRange() const { return QualifierRange; } 2148 void setQualifierRange(SourceRange R) { QualifierRange = R; } 2149 2150 /// \brief Retrieve the first part of the nested-name-specifier that was 2151 /// found in the scope of the member access expression when the member access 2152 /// was initially parsed. 2153 /// 2154 /// This function only returns a useful result when member access expression 2155 /// uses a qualified member name, e.g., "x.Base::f". Here, the declaration 2156 /// returned by this function describes what was found by unqualified name 2157 /// lookup for the identifier "Base" within the scope of the member access 2158 /// expression itself. At template instantiation time, this information is 2159 /// combined with the results of name lookup into the type of the object 2160 /// expression itself (the class type of x). 2161 NamedDecl *getFirstQualifierFoundInScope() const { 2162 return FirstQualifierFoundInScope; 2163 } 2164 void setFirstQualifierFoundInScope(NamedDecl *D) { 2165 FirstQualifierFoundInScope = D; 2166 } 2167 2168 /// \brief Retrieve the name of the member that this expression 2169 /// refers to. 2170 const DeclarationNameInfo &getMemberNameInfo() const { 2171 return MemberNameInfo; 2172 } 2173 void setMemberNameInfo(const DeclarationNameInfo &N) { MemberNameInfo = N; } 2174 2175 /// \brief Retrieve the name of the member that this expression 2176 /// refers to. 2177 DeclarationName getMember() const { return MemberNameInfo.getName(); } 2178 void setMember(DeclarationName N) { MemberNameInfo.setName(N); } 2179 2180 // \brief Retrieve the location of the name of the member that this 2181 // expression refers to. 2182 SourceLocation getMemberLoc() const { return MemberNameInfo.getLoc(); } 2183 void setMemberLoc(SourceLocation L) { MemberNameInfo.setLoc(L); } 2184 2185 /// \brief Determines whether this member expression actually had a C++ 2186 /// template argument list explicitly specified, e.g., x.f<int>. 2187 bool hasExplicitTemplateArgs() const { 2188 return HasExplicitTemplateArgs; 2189 } 2190 2191 /// \brief Retrieve the explicit template argument list that followed the 2192 /// member template name, if any. 2193 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 2194 assert(HasExplicitTemplateArgs); 2195 return *reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 2196 } 2197 2198 /// \brief Retrieve the explicit template argument list that followed the 2199 /// member template name, if any. 2200 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 2201 return const_cast<CXXDependentScopeMemberExpr *>(this) 2202 ->getExplicitTemplateArgs(); 2203 } 2204 2205 /// \brief Retrieves the optional explicit template arguments. 2206 /// This points to the same data as getExplicitTemplateArgs(), but 2207 /// returns null if there are no explicit template arguments. 2208 const ExplicitTemplateArgumentList *getOptionalExplicitTemplateArgs() { 2209 if (!hasExplicitTemplateArgs()) return 0; 2210 return &getExplicitTemplateArgs(); 2211 } 2212 2213 /// \brief Copies the template arguments (if present) into the given 2214 /// structure. 2215 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 2216 getExplicitTemplateArgs().copyInto(List); 2217 } 2218 2219 /// \brief Initializes the template arguments using the given structure. 2220 void initializeTemplateArgumentsFrom(const TemplateArgumentListInfo &List) { 2221 getExplicitTemplateArgs().initializeFrom(List); 2222 } 2223 2224 /// \brief Retrieve the location of the left angle bracket following the 2225 /// member name ('<'), if any. 2226 SourceLocation getLAngleLoc() const { 2227 return getExplicitTemplateArgs().LAngleLoc; 2228 } 2229 2230 /// \brief Retrieve the template arguments provided as part of this 2231 /// template-id. 2232 const TemplateArgumentLoc *getTemplateArgs() const { 2233 return getExplicitTemplateArgs().getTemplateArgs(); 2234 } 2235 2236 /// \brief Retrieve the number of template arguments provided as part of this 2237 /// template-id. 2238 unsigned getNumTemplateArgs() const { 2239 return getExplicitTemplateArgs().NumTemplateArgs; 2240 } 2241 2242 /// \brief Retrieve the location of the right angle bracket following the 2243 /// template arguments ('>'). 2244 SourceLocation getRAngleLoc() const { 2245 return getExplicitTemplateArgs().RAngleLoc; 2246 } 2247 2248 virtual SourceRange getSourceRange() const { 2249 SourceRange Range; 2250 if (!isImplicitAccess()) 2251 Range.setBegin(Base->getSourceRange().getBegin()); 2252 else if (getQualifier()) 2253 Range.setBegin(getQualifierRange().getBegin()); 2254 else 2255 Range.setBegin(MemberNameInfo.getBeginLoc()); 2256 2257 if (hasExplicitTemplateArgs()) 2258 Range.setEnd(getRAngleLoc()); 2259 else 2260 Range.setEnd(MemberNameInfo.getEndLoc()); 2261 return Range; 2262 } 2263 2264 static bool classof(const Stmt *T) { 2265 return T->getStmtClass() == CXXDependentScopeMemberExprClass; 2266 } 2267 static bool classof(const CXXDependentScopeMemberExpr *) { return true; } 2268 2269 // Iterators 2270 virtual child_iterator child_begin(); 2271 virtual child_iterator child_end(); 2272 2273 friend class ASTStmtReader; 2274 friend class ASTStmtWriter; 2275}; 2276 2277/// \brief Represents a C++ member access expression for which lookup 2278/// produced a set of overloaded functions. 2279/// 2280/// The member access may be explicit or implicit: 2281/// struct A { 2282/// int a, b; 2283/// int explicitAccess() { return this->a + this->A::b; } 2284/// int implicitAccess() { return a + A::b; } 2285/// }; 2286/// 2287/// In the final AST, an explicit access always becomes a MemberExpr. 2288/// An implicit access may become either a MemberExpr or a 2289/// DeclRefExpr, depending on whether the member is static. 2290class UnresolvedMemberExpr : public OverloadExpr { 2291 /// \brief Whether this member expression used the '->' operator or 2292 /// the '.' operator. 2293 bool IsArrow : 1; 2294 2295 /// \brief Whether the lookup results contain an unresolved using 2296 /// declaration. 2297 bool HasUnresolvedUsing : 1; 2298 2299 /// \brief The expression for the base pointer or class reference, 2300 /// e.g., the \c x in x.f. This can be null if this is an 'unbased' 2301 /// member expression 2302 Stmt *Base; 2303 2304 /// \brief The type of the base expression; never null. 2305 QualType BaseType; 2306 2307 /// \brief The location of the '->' or '.' operator. 2308 SourceLocation OperatorLoc; 2309 2310 UnresolvedMemberExpr(ASTContext &C, QualType T, bool Dependent, 2311 bool HasUnresolvedUsing, 2312 Expr *Base, QualType BaseType, bool IsArrow, 2313 SourceLocation OperatorLoc, 2314 NestedNameSpecifier *Qualifier, 2315 SourceRange QualifierRange, 2316 const DeclarationNameInfo &MemberNameInfo, 2317 const TemplateArgumentListInfo *TemplateArgs, 2318 UnresolvedSetIterator Begin, UnresolvedSetIterator End); 2319 2320 UnresolvedMemberExpr(EmptyShell Empty) 2321 : OverloadExpr(UnresolvedMemberExprClass, Empty), IsArrow(false), 2322 HasUnresolvedUsing(false), Base(0) { } 2323 2324public: 2325 static UnresolvedMemberExpr * 2326 Create(ASTContext &C, bool Dependent, bool HasUnresolvedUsing, 2327 Expr *Base, QualType BaseType, bool IsArrow, 2328 SourceLocation OperatorLoc, 2329 NestedNameSpecifier *Qualifier, 2330 SourceRange QualifierRange, 2331 const DeclarationNameInfo &MemberNameInfo, 2332 const TemplateArgumentListInfo *TemplateArgs, 2333 UnresolvedSetIterator Begin, UnresolvedSetIterator End); 2334 2335 static UnresolvedMemberExpr * 2336 CreateEmpty(ASTContext &C, unsigned NumTemplateArgs); 2337 2338 /// \brief True if this is an implicit access, i.e. one in which the 2339 /// member being accessed was not written in the source. The source 2340 /// location of the operator is invalid in this case. 2341 bool isImplicitAccess() const { return Base == 0; } 2342 2343 /// \brief Retrieve the base object of this member expressions, 2344 /// e.g., the \c x in \c x.m. 2345 Expr *getBase() { 2346 assert(!isImplicitAccess()); 2347 return cast<Expr>(Base); 2348 } 2349 const Expr *getBase() const { 2350 assert(!isImplicitAccess()); 2351 return cast<Expr>(Base); 2352 } 2353 void setBase(Expr *E) { Base = E; } 2354 2355 QualType getBaseType() const { return BaseType; } 2356 void setBaseType(QualType T) { BaseType = T; } 2357 2358 /// \brief Determine whether the lookup results contain an unresolved using 2359 /// declaration. 2360 bool hasUnresolvedUsing() const { return HasUnresolvedUsing; } 2361 void setHasUnresolvedUsing(bool V) { HasUnresolvedUsing = V; } 2362 2363 /// \brief Determine whether this member expression used the '->' 2364 /// operator; otherwise, it used the '.' operator. 2365 bool isArrow() const { return IsArrow; } 2366 void setArrow(bool A) { IsArrow = A; } 2367 2368 /// \brief Retrieve the location of the '->' or '.' operator. 2369 SourceLocation getOperatorLoc() const { return OperatorLoc; } 2370 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 2371 2372 /// \brief Retrieves the naming class of this lookup. 2373 CXXRecordDecl *getNamingClass() const; 2374 2375 /// \brief Retrieve the full name info for the member that this expression 2376 /// refers to. 2377 const DeclarationNameInfo &getMemberNameInfo() const { return getNameInfo(); } 2378 void setMemberNameInfo(const DeclarationNameInfo &N) { setNameInfo(N); } 2379 2380 /// \brief Retrieve the name of the member that this expression 2381 /// refers to. 2382 DeclarationName getMemberName() const { return getName(); } 2383 void setMemberName(DeclarationName N) { setName(N); } 2384 2385 // \brief Retrieve the location of the name of the member that this 2386 // expression refers to. 2387 SourceLocation getMemberLoc() const { return getNameLoc(); } 2388 void setMemberLoc(SourceLocation L) { setNameLoc(L); } 2389 2390 /// \brief Retrieve the explicit template argument list that followed the 2391 /// member template name. 2392 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 2393 assert(hasExplicitTemplateArgs()); 2394 return *reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 2395 } 2396 2397 /// \brief Retrieve the explicit template argument list that followed the 2398 /// member template name, if any. 2399 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 2400 assert(hasExplicitTemplateArgs()); 2401 return *reinterpret_cast<const ExplicitTemplateArgumentList *>(this + 1); 2402 } 2403 2404 /// \brief Retrieves the optional explicit template arguments. 2405 /// This points to the same data as getExplicitTemplateArgs(), but 2406 /// returns null if there are no explicit template arguments. 2407 const ExplicitTemplateArgumentList *getOptionalExplicitTemplateArgs() { 2408 if (!hasExplicitTemplateArgs()) return 0; 2409 return &getExplicitTemplateArgs(); 2410 } 2411 2412 /// \brief Copies the template arguments into the given structure. 2413 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 2414 getExplicitTemplateArgs().copyInto(List); 2415 } 2416 2417 /// \brief Retrieve the location of the left angle bracket following 2418 /// the member name ('<'). 2419 SourceLocation getLAngleLoc() const { 2420 return getExplicitTemplateArgs().LAngleLoc; 2421 } 2422 2423 /// \brief Retrieve the template arguments provided as part of this 2424 /// template-id. 2425 const TemplateArgumentLoc *getTemplateArgs() const { 2426 return getExplicitTemplateArgs().getTemplateArgs(); 2427 } 2428 2429 /// \brief Retrieve the number of template arguments provided as 2430 /// part of this template-id. 2431 unsigned getNumTemplateArgs() const { 2432 return getExplicitTemplateArgs().NumTemplateArgs; 2433 } 2434 2435 /// \brief Retrieve the location of the right angle bracket 2436 /// following the template arguments ('>'). 2437 SourceLocation getRAngleLoc() const { 2438 return getExplicitTemplateArgs().RAngleLoc; 2439 } 2440 2441 virtual SourceRange getSourceRange() const { 2442 SourceRange Range = getMemberNameInfo().getSourceRange(); 2443 if (!isImplicitAccess()) 2444 Range.setBegin(Base->getSourceRange().getBegin()); 2445 else if (getQualifier()) 2446 Range.setBegin(getQualifierRange().getBegin()); 2447 2448 if (hasExplicitTemplateArgs()) 2449 Range.setEnd(getRAngleLoc()); 2450 return Range; 2451 } 2452 2453 static bool classof(const Stmt *T) { 2454 return T->getStmtClass() == UnresolvedMemberExprClass; 2455 } 2456 static bool classof(const UnresolvedMemberExpr *) { return true; } 2457 2458 // Iterators 2459 virtual child_iterator child_begin(); 2460 virtual child_iterator child_end(); 2461}; 2462 2463/// \brief Represents a C++0x noexcept expression (C++ [expr.unary.noexcept]). 2464/// 2465/// The noexcept expression tests whether a given expression might throw. Its 2466/// result is a boolean constant. 2467class CXXNoexceptExpr : public Expr { 2468 bool Value : 1; 2469 Stmt *Operand; 2470 SourceRange Range; 2471 2472 friend class ASTStmtReader; 2473 2474public: 2475 CXXNoexceptExpr(QualType Ty, Expr *Operand, CanThrowResult Val, 2476 SourceLocation Keyword, SourceLocation RParen) 2477 : Expr(CXXNoexceptExprClass, Ty, /*TypeDependent*/false, 2478 /*ValueDependent*/Val == CT_Dependent), 2479 Value(Val == CT_Cannot), Operand(Operand), Range(Keyword, RParen) 2480 { } 2481 2482 CXXNoexceptExpr(EmptyShell Empty) 2483 : Expr(CXXNoexceptExprClass, Empty) 2484 { } 2485 2486 Expr *getOperand() const { return static_cast<Expr*>(Operand); } 2487 2488 virtual SourceRange getSourceRange() const { return Range; } 2489 2490 bool getValue() const { return Value; } 2491 2492 static bool classof(const Stmt *T) { 2493 return T->getStmtClass() == CXXNoexceptExprClass; 2494 } 2495 static bool classof(const CXXNoexceptExpr *) { return true; } 2496 2497 // Iterators 2498 virtual child_iterator child_begin(); 2499 virtual child_iterator child_end(); 2500}; 2501 2502inline ExplicitTemplateArgumentList &OverloadExpr::getExplicitTemplateArgs() { 2503 if (isa<UnresolvedLookupExpr>(this)) 2504 return cast<UnresolvedLookupExpr>(this)->getExplicitTemplateArgs(); 2505 else 2506 return cast<UnresolvedMemberExpr>(this)->getExplicitTemplateArgs(); 2507} 2508 2509} // end namespace clang 2510 2511#endif 2512