Expr.h revision deac9c3cf701b04f18af21c222f75c9f6b9ae60b
1//===--- Expr.h - Classes for representing expressions ----------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file was developed by Chris Lattner and is distributed under 6// the University of Illinois Open Source License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Expr interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_EXPR_H 15#define LLVM_CLANG_AST_EXPR_H 16 17#include "clang/AST/Stmt.h" 18#include "clang/AST/Type.h" 19#include "clang/AST/Decl.h" 20#include "clang/Basic/IdentifierTable.h" 21#include "llvm/ADT/APSInt.h" 22#include "llvm/ADT/APFloat.h" 23 24namespace clang { 25 class IdentifierInfo; 26 class Selector; 27 class Decl; 28 class ASTContext; 29 30/// Expr - This represents one expression. Note that Expr's are subclasses of 31/// Stmt. This allows an expression to be transparently used any place a Stmt 32/// is required. 33/// 34class Expr : public Stmt { 35 QualType TR; 36protected: 37 Expr(StmtClass SC, QualType T) : Stmt(SC), TR(T) {} 38public: 39 QualType getType() const { return TR; } 40 void setType(QualType t) { TR = t; } 41 42 /// SourceLocation tokens are not useful in isolation - they are low level 43 /// value objects created/interpreted by SourceManager. We assume AST 44 /// clients will have a pointer to the respective SourceManager. 45 virtual SourceRange getSourceRange() const = 0; 46 47 /// getExprLoc - Return the preferred location for the arrow when diagnosing 48 /// a problem with a generic expression. 49 virtual SourceLocation getExprLoc() const { return getLocStart(); } 50 51 /// hasLocalSideEffect - Return true if this immediate expression has side 52 /// effects, not counting any sub-expressions. 53 bool hasLocalSideEffect() const; 54 55 /// isLvalue - C99 6.3.2.1: an lvalue is an expression with an object type or 56 /// incomplete type other than void. Nonarray expressions that can be lvalues: 57 /// - name, where name must be a variable 58 /// - e[i] 59 /// - (e), where e must be an lvalue 60 /// - e.name, where e must be an lvalue 61 /// - e->name 62 /// - *e, the type of e cannot be a function type 63 /// - string-constant 64 /// - reference type [C++ [expr]] 65 /// 66 enum isLvalueResult { 67 LV_Valid, 68 LV_NotObjectType, 69 LV_IncompleteVoidType, 70 LV_DuplicateVectorComponents, 71 LV_InvalidExpression 72 }; 73 isLvalueResult isLvalue() const; 74 75 /// isModifiableLvalue - C99 6.3.2.1: an lvalue that does not have array type, 76 /// does not have an incomplete type, does not have a const-qualified type, 77 /// and if it is a structure or union, does not have any member (including, 78 /// recursively, any member or element of all contained aggregates or unions) 79 /// with a const-qualified type. 80 enum isModifiableLvalueResult { 81 MLV_Valid, 82 MLV_NotObjectType, 83 MLV_IncompleteVoidType, 84 MLV_DuplicateVectorComponents, 85 MLV_InvalidExpression, 86 MLV_IncompleteType, 87 MLV_ConstQualified, 88 MLV_ArrayType 89 }; 90 isModifiableLvalueResult isModifiableLvalue() const; 91 92 bool isNullPointerConstant(ASTContext &Ctx) const; 93 94 /// isIntegerConstantExpr - Return true if this expression is a valid integer 95 /// constant expression, and, if so, return its value in Result. If not a 96 /// valid i-c-e, return false and fill in Loc (if specified) with the location 97 /// of the invalid expression. 98 bool isIntegerConstantExpr(llvm::APSInt &Result, ASTContext &Ctx, 99 SourceLocation *Loc = 0, 100 bool isEvaluated = true) const; 101 bool isIntegerConstantExpr(ASTContext &Ctx, SourceLocation *Loc = 0) const { 102 llvm::APSInt X(32); 103 return isIntegerConstantExpr(X, Ctx, Loc); 104 } 105 /// isConstantExpr - Return true if this expression is a valid constant expr. 106 bool isConstantExpr(ASTContext &Ctx, SourceLocation *Loc) const; 107 108 /// hasStaticStorage - Return true if this expression has static storage 109 /// duration. 110 bool hasStaticStorage() const; 111 112 static bool classof(const Stmt *T) { 113 return T->getStmtClass() >= firstExprConstant && 114 T->getStmtClass() <= lastExprConstant; 115 } 116 static bool classof(const Expr *) { return true; } 117 118 static inline Expr* Create(llvm::Deserializer& D) { 119 return cast<Expr>(Stmt::Create(D)); 120 } 121}; 122 123//===----------------------------------------------------------------------===// 124// Primary Expressions. 125//===----------------------------------------------------------------------===// 126 127/// DeclRefExpr - [C99 6.5.1p2] - A reference to a declared variable, function, 128/// enum, etc. 129class DeclRefExpr : public Expr { 130 ValueDecl *D; 131 SourceLocation Loc; 132public: 133 DeclRefExpr(ValueDecl *d, QualType t, SourceLocation l) : 134 Expr(DeclRefExprClass, t), D(d), Loc(l) {} 135 136 ValueDecl *getDecl() { return D; } 137 const ValueDecl *getDecl() const { return D; } 138 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 139 140 141 static bool classof(const Stmt *T) { 142 return T->getStmtClass() == DeclRefExprClass; 143 } 144 static bool classof(const DeclRefExpr *) { return true; } 145 146 // Iterators 147 virtual child_iterator child_begin(); 148 virtual child_iterator child_end(); 149 150 virtual void EmitImpl(llvm::Serializer& S) const; 151 static DeclRefExpr* CreateImpl(llvm::Deserializer& D); 152}; 153 154/// PreDefinedExpr - [C99 6.4.2.2] - A pre-defined identifier such as __func__. 155class PreDefinedExpr : public Expr { 156public: 157 enum IdentType { 158 Func, 159 Function, 160 PrettyFunction 161 }; 162 163private: 164 SourceLocation Loc; 165 IdentType Type; 166public: 167 PreDefinedExpr(SourceLocation l, QualType type, IdentType IT) 168 : Expr(PreDefinedExprClass, type), Loc(l), Type(IT) {} 169 170 IdentType getIdentType() const { return Type; } 171 172 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 173 174 static bool classof(const Stmt *T) { 175 return T->getStmtClass() == PreDefinedExprClass; 176 } 177 static bool classof(const PreDefinedExpr *) { return true; } 178 179 // Iterators 180 virtual child_iterator child_begin(); 181 virtual child_iterator child_end(); 182 183 virtual void EmitImpl(llvm::Serializer& S) const; 184 static PreDefinedExpr* CreateImpl(llvm::Deserializer& D); 185}; 186 187class IntegerLiteral : public Expr { 188 llvm::APInt Value; 189 SourceLocation Loc; 190public: 191 // type should be IntTy, LongTy, LongLongTy, UnsignedIntTy, UnsignedLongTy, 192 // or UnsignedLongLongTy 193 IntegerLiteral(const llvm::APInt &V, QualType type, SourceLocation l) 194 : Expr(IntegerLiteralClass, type), Value(V), Loc(l) { 195 assert(type->isIntegerType() && "Illegal type in IntegerLiteral"); 196 } 197 const llvm::APInt &getValue() const { return Value; } 198 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 199 200 static bool classof(const Stmt *T) { 201 return T->getStmtClass() == IntegerLiteralClass; 202 } 203 static bool classof(const IntegerLiteral *) { return true; } 204 205 // Iterators 206 virtual child_iterator child_begin(); 207 virtual child_iterator child_end(); 208 209 virtual void EmitImpl(llvm::Serializer& S) const; 210 static IntegerLiteral* CreateImpl(llvm::Deserializer& D); 211}; 212 213class CharacterLiteral : public Expr { 214 unsigned Value; 215 SourceLocation Loc; 216public: 217 // type should be IntTy 218 CharacterLiteral(unsigned value, QualType type, SourceLocation l) 219 : Expr(CharacterLiteralClass, type), Value(value), Loc(l) { 220 } 221 SourceLocation getLoc() const { return Loc; } 222 223 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 224 225 unsigned getValue() const { return Value; } 226 227 static bool classof(const Stmt *T) { 228 return T->getStmtClass() == CharacterLiteralClass; 229 } 230 static bool classof(const CharacterLiteral *) { return true; } 231 232 // Iterators 233 virtual child_iterator child_begin(); 234 virtual child_iterator child_end(); 235 236 virtual void EmitImpl(llvm::Serializer& S) const; 237 static CharacterLiteral* CreateImpl(llvm::Deserializer& D); 238}; 239 240class FloatingLiteral : public Expr { 241 llvm::APFloat Value; 242 SourceLocation Loc; 243public: 244 FloatingLiteral(const llvm::APFloat &V, QualType Type, SourceLocation L) 245 : Expr(FloatingLiteralClass, Type), Value(V), Loc(L) {} 246 247 const llvm::APFloat &getValue() const { return Value; } 248 249 /// getValueAsDouble - This returns the value as an inaccurate double. Note 250 /// that this may cause loss of precision, but is useful for debugging dumps 251 /// etc. 252 double getValueAsDouble() const { 253 // FIXME: We need something for long double here. 254 if (cast<BuiltinType>(getType())->getKind() == BuiltinType::Float) 255 return Value.convertToFloat(); 256 else 257 return Value.convertToDouble(); 258 } 259 260 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 261 262 static bool classof(const Stmt *T) { 263 return T->getStmtClass() == FloatingLiteralClass; 264 } 265 static bool classof(const FloatingLiteral *) { return true; } 266 267 // Iterators 268 virtual child_iterator child_begin(); 269 virtual child_iterator child_end(); 270 271 virtual void EmitImpl(llvm::Serializer& S) const; 272 static FloatingLiteral* CreateImpl(llvm::Deserializer& D); 273}; 274 275/// ImaginaryLiteral - We support imaginary integer and floating point literals, 276/// like "1.0i". We represent these as a wrapper around FloatingLiteral and 277/// IntegerLiteral classes. Instances of this class always have a Complex type 278/// whose element type matches the subexpression. 279/// 280class ImaginaryLiteral : public Expr { 281 Expr *Val; 282public: 283 ImaginaryLiteral(Expr *val, QualType Ty) 284 : Expr(ImaginaryLiteralClass, Ty), Val(val) {} 285 286 const Expr *getSubExpr() const { return Val; } 287 Expr *getSubExpr() { return Val; } 288 289 virtual SourceRange getSourceRange() const { return Val->getSourceRange(); } 290 static bool classof(const Stmt *T) { 291 return T->getStmtClass() == ImaginaryLiteralClass; 292 } 293 static bool classof(const ImaginaryLiteral *) { return true; } 294 295 // Iterators 296 virtual child_iterator child_begin(); 297 virtual child_iterator child_end(); 298 299 virtual void EmitImpl(llvm::Serializer& S) const; 300 static ImaginaryLiteral* CreateImpl(llvm::Deserializer& D); 301}; 302 303/// StringLiteral - This represents a string literal expression, e.g. "foo" 304/// or L"bar" (wide strings). The actual string is returned by getStrData() 305/// is NOT null-terminated, and the length of the string is determined by 306/// calling getByteLength(). 307class StringLiteral : public Expr { 308 const char *StrData; 309 unsigned ByteLength; 310 bool IsWide; 311 // if the StringLiteral was composed using token pasting, both locations 312 // are needed. If not (the common case), firstTokLoc == lastTokLoc. 313 // FIXME: if space becomes an issue, we should create a sub-class. 314 SourceLocation firstTokLoc, lastTokLoc; 315public: 316 StringLiteral(const char *strData, unsigned byteLength, bool Wide, 317 QualType t, SourceLocation b, SourceLocation e); 318 virtual ~StringLiteral(); 319 320 const char *getStrData() const { return StrData; } 321 unsigned getByteLength() const { return ByteLength; } 322 bool isWide() const { return IsWide; } 323 324 virtual SourceRange getSourceRange() const { 325 return SourceRange(firstTokLoc,lastTokLoc); 326 } 327 static bool classof(const Stmt *T) { 328 return T->getStmtClass() == StringLiteralClass; 329 } 330 static bool classof(const StringLiteral *) { return true; } 331 332 // Iterators 333 virtual child_iterator child_begin(); 334 virtual child_iterator child_end(); 335 336 virtual void EmitImpl(llvm::Serializer& S) const; 337 static StringLiteral* CreateImpl(llvm::Deserializer& D); 338}; 339 340/// ParenExpr - This represents a parethesized expression, e.g. "(1)". This 341/// AST node is only formed if full location information is requested. 342class ParenExpr : public Expr { 343 SourceLocation L, R; 344 Expr *Val; 345public: 346 ParenExpr(SourceLocation l, SourceLocation r, Expr *val) 347 : Expr(ParenExprClass, val->getType()), L(l), R(r), Val(val) {} 348 349 const Expr *getSubExpr() const { return Val; } 350 Expr *getSubExpr() { return Val; } 351 SourceRange getSourceRange() const { return SourceRange(L, R); } 352 353 static bool classof(const Stmt *T) { 354 return T->getStmtClass() == ParenExprClass; 355 } 356 static bool classof(const ParenExpr *) { return true; } 357 358 // Iterators 359 virtual child_iterator child_begin(); 360 virtual child_iterator child_end(); 361 362 virtual void EmitImpl(llvm::Serializer& S) const; 363 static ParenExpr* CreateImpl(llvm::Deserializer& D); 364}; 365 366 367/// UnaryOperator - This represents the unary-expression's (except sizeof of 368/// types), the postinc/postdec operators from postfix-expression, and various 369/// extensions. 370/// 371/// Notes on various nodes: 372/// 373/// Real/Imag - These return the real/imag part of a complex operand. If 374/// applied to a non-complex value, the former returns its operand and the 375/// later returns zero in the type of the operand. 376/// 377/// __builtin_offsetof(type, a.b[10]) is represented as a unary operator whose 378/// subexpression is a compound literal with the various MemberExpr and 379/// ArraySubscriptExpr's applied to it. 380/// 381class UnaryOperator : public Expr { 382public: 383 // Note that additions to this should also update the StmtVisitor class. 384 enum Opcode { 385 PostInc, PostDec, // [C99 6.5.2.4] Postfix increment and decrement operators 386 PreInc, PreDec, // [C99 6.5.3.1] Prefix increment and decrement operators. 387 AddrOf, Deref, // [C99 6.5.3.2] Address and indirection operators. 388 Plus, Minus, // [C99 6.5.3.3] Unary arithmetic operators. 389 Not, LNot, // [C99 6.5.3.3] Unary arithmetic operators. 390 SizeOf, AlignOf, // [C99 6.5.3.4] Sizeof (expr, not type) operator. 391 Real, Imag, // "__real expr"/"__imag expr" Extension. 392 Extension, // __extension__ marker. 393 OffsetOf // __builtin_offsetof 394 }; 395private: 396 Expr *Val; 397 Opcode Opc; 398 SourceLocation Loc; 399public: 400 401 UnaryOperator(Expr *input, Opcode opc, QualType type, SourceLocation l) 402 : Expr(UnaryOperatorClass, type), Val(input), Opc(opc), Loc(l) {} 403 404 Opcode getOpcode() const { return Opc; } 405 Expr *getSubExpr() const { return Val; } 406 407 /// getOperatorLoc - Return the location of the operator. 408 SourceLocation getOperatorLoc() const { return Loc; } 409 410 /// isPostfix - Return true if this is a postfix operation, like x++. 411 static bool isPostfix(Opcode Op); 412 413 bool isPostfix() const { return isPostfix(Opc); } 414 bool isIncrementDecrementOp() const { return Opc>=PostInc && Opc<=PreDec; } 415 bool isSizeOfAlignOfOp() const { return Opc == SizeOf || Opc == AlignOf; } 416 static bool isArithmeticOp(Opcode Op) { return Op >= Plus && Op <= LNot; } 417 418 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 419 /// corresponds to, e.g. "sizeof" or "[pre]++" 420 static const char *getOpcodeStr(Opcode Op); 421 422 virtual SourceRange getSourceRange() const { 423 if (isPostfix()) 424 return SourceRange(Val->getLocStart(), Loc); 425 else 426 return SourceRange(Loc, Val->getLocEnd()); 427 } 428 virtual SourceLocation getExprLoc() const { return Loc; } 429 430 static bool classof(const Stmt *T) { 431 return T->getStmtClass() == UnaryOperatorClass; 432 } 433 static bool classof(const UnaryOperator *) { return true; } 434 435 // Iterators 436 virtual child_iterator child_begin(); 437 virtual child_iterator child_end(); 438 439 virtual void EmitImpl(llvm::Serializer& S) const; 440 static UnaryOperator* CreateImpl(llvm::Deserializer& D); 441}; 442 443/// SizeOfAlignOfTypeExpr - [C99 6.5.3.4] - This is only for sizeof/alignof of 444/// *types*. sizeof(expr) is handled by UnaryOperator. 445class SizeOfAlignOfTypeExpr : public Expr { 446 bool isSizeof; // true if sizeof, false if alignof. 447 QualType Ty; 448 SourceLocation OpLoc, RParenLoc; 449public: 450 SizeOfAlignOfTypeExpr(bool issizeof, QualType argType, QualType resultType, 451 SourceLocation op, SourceLocation rp) : 452 Expr(SizeOfAlignOfTypeExprClass, resultType), 453 isSizeof(issizeof), Ty(argType), OpLoc(op), RParenLoc(rp) {} 454 455 bool isSizeOf() const { return isSizeof; } 456 QualType getArgumentType() const { return Ty; } 457 458 SourceLocation getOperatorLoc() const { return OpLoc; } 459 SourceRange getSourceRange() const { return SourceRange(OpLoc, RParenLoc); } 460 461 static bool classof(const Stmt *T) { 462 return T->getStmtClass() == SizeOfAlignOfTypeExprClass; 463 } 464 static bool classof(const SizeOfAlignOfTypeExpr *) { return true; } 465 466 // Iterators 467 virtual child_iterator child_begin(); 468 virtual child_iterator child_end(); 469 470 virtual void EmitImpl(llvm::Serializer& S) const; 471 static SizeOfAlignOfTypeExpr* CreateImpl(llvm::Deserializer& D); 472}; 473 474//===----------------------------------------------------------------------===// 475// Postfix Operators. 476//===----------------------------------------------------------------------===// 477 478/// ArraySubscriptExpr - [C99 6.5.2.1] Array Subscripting. 479class ArraySubscriptExpr : public Expr { 480 enum { LHS, RHS, END_EXPR=2 }; 481 Expr* SubExprs[END_EXPR]; 482 SourceLocation RBracketLoc; 483public: 484 ArraySubscriptExpr(Expr *lhs, Expr *rhs, QualType t, 485 SourceLocation rbracketloc) 486 : Expr(ArraySubscriptExprClass, t), RBracketLoc(rbracketloc) { 487 SubExprs[LHS] = lhs; 488 SubExprs[RHS] = rhs; 489 } 490 491 /// An array access can be written A[4] or 4[A] (both are equivalent). 492 /// - getBase() and getIdx() always present the normalized view: A[4]. 493 /// In this case getBase() returns "A" and getIdx() returns "4". 494 /// - getLHS() and getRHS() present the syntactic view. e.g. for 495 /// 4[A] getLHS() returns "4". 496 497 Expr *getLHS() { return SubExprs[LHS]; } 498 const Expr *getLHS() const { return SubExprs[LHS]; } 499 500 Expr *getRHS() { return SubExprs[RHS]; } 501 const Expr *getRHS() const { return SubExprs[RHS]; } 502 503 Expr *getBase() { 504 return (getLHS()->getType()->isIntegerType()) ? getRHS() : getLHS(); 505 } 506 507 const Expr *getBase() const { 508 return (getLHS()->getType()->isIntegerType()) ? getRHS() : getLHS(); 509 } 510 511 Expr *getIdx() { 512 return (getLHS()->getType()->isIntegerType()) ? getLHS() : getRHS(); 513 } 514 515 const Expr *getIdx() const { 516 return (getLHS()->getType()->isIntegerType()) ? getLHS() : getRHS(); 517 } 518 519 520 SourceRange getSourceRange() const { 521 return SourceRange(getLHS()->getLocStart(), RBracketLoc); 522 } 523 virtual SourceLocation getExprLoc() const { return RBracketLoc; } 524 525 static bool classof(const Stmt *T) { 526 return T->getStmtClass() == ArraySubscriptExprClass; 527 } 528 static bool classof(const ArraySubscriptExpr *) { return true; } 529 530 // Iterators 531 virtual child_iterator child_begin(); 532 virtual child_iterator child_end(); 533 534 virtual void EmitImpl(llvm::Serializer& S) const; 535 static ArraySubscriptExpr* CreateImpl(llvm::Deserializer& D); 536}; 537 538 539/// CallExpr - [C99 6.5.2.2] Function Calls. 540/// 541class CallExpr : public Expr { 542 enum { FN=0, ARGS_START=1 }; 543 Expr **SubExprs; 544 unsigned NumArgs; 545 SourceLocation RParenLoc; 546 547 // This version of the ctor is for deserialization. 548 CallExpr(Expr** subexprs, unsigned numargs, QualType t, 549 SourceLocation rparenloc) 550 : Expr(CallExprClass,t), SubExprs(subexprs), 551 NumArgs(numargs), RParenLoc(rparenloc) {} 552 553public: 554 CallExpr(Expr *fn, Expr **args, unsigned numargs, QualType t, 555 SourceLocation rparenloc); 556 ~CallExpr() { 557 delete [] SubExprs; 558 } 559 560 const Expr *getCallee() const { return SubExprs[FN]; } 561 Expr *getCallee() { return SubExprs[FN]; } 562 563 /// getNumArgs - Return the number of actual arguments to this call. 564 /// 565 unsigned getNumArgs() const { return NumArgs; } 566 567 /// getArg - Return the specified argument. 568 Expr *getArg(unsigned Arg) { 569 assert(Arg < NumArgs && "Arg access out of range!"); 570 return SubExprs[Arg+ARGS_START]; 571 } 572 const Expr *getArg(unsigned Arg) const { 573 assert(Arg < NumArgs && "Arg access out of range!"); 574 return SubExprs[Arg+ARGS_START]; 575 } 576 /// setArg - Set the specified argument. 577 void setArg(unsigned Arg, Expr *ArgExpr) { 578 assert(Arg < NumArgs && "Arg access out of range!"); 579 SubExprs[Arg+ARGS_START] = ArgExpr; 580 } 581 /// getNumCommas - Return the number of commas that must have been present in 582 /// this function call. 583 unsigned getNumCommas() const { return NumArgs ? NumArgs - 1 : 0; } 584 585 bool isBuiltinClassifyType(llvm::APSInt &Result) const; 586 587 SourceRange getSourceRange() const { 588 return SourceRange(getCallee()->getLocStart(), RParenLoc); 589 } 590 591 static bool classof(const Stmt *T) { 592 return T->getStmtClass() == CallExprClass; 593 } 594 static bool classof(const CallExpr *) { return true; } 595 596 // Iterators 597 virtual child_iterator child_begin(); 598 virtual child_iterator child_end(); 599 600 virtual void EmitImpl(llvm::Serializer& S) const; 601 static CallExpr* CreateImpl(llvm::Deserializer& D); 602}; 603 604/// MemberExpr - [C99 6.5.2.3] Structure and Union Members. 605/// 606class MemberExpr : public Expr { 607 Expr *Base; 608 FieldDecl *MemberDecl; 609 SourceLocation MemberLoc; 610 bool IsArrow; // True if this is "X->F", false if this is "X.F". 611public: 612 MemberExpr(Expr *base, bool isarrow, FieldDecl *memberdecl, SourceLocation l) 613 : Expr(MemberExprClass, memberdecl->getType()), 614 Base(base), MemberDecl(memberdecl), MemberLoc(l), IsArrow(isarrow) {} 615 616 Expr *getBase() const { return Base; } 617 FieldDecl *getMemberDecl() const { return MemberDecl; } 618 bool isArrow() const { return IsArrow; } 619 620 virtual SourceRange getSourceRange() const { 621 return SourceRange(getBase()->getLocStart(), MemberLoc); 622 } 623 virtual SourceLocation getExprLoc() const { return MemberLoc; } 624 625 static bool classof(const Stmt *T) { 626 return T->getStmtClass() == MemberExprClass; 627 } 628 static bool classof(const MemberExpr *) { return true; } 629 630 // Iterators 631 virtual child_iterator child_begin(); 632 virtual child_iterator child_end(); 633 634 virtual void EmitImpl(llvm::Serializer& S) const; 635 static MemberExpr* CreateImpl(llvm::Deserializer& D); 636}; 637 638/// OCUVectorElementExpr - This represents access to specific elements of a 639/// vector, and may occur on the left hand side or right hand side. For example 640/// the following is legal: "V.xy = V.zw" if V is a 4 element ocu vector. 641/// 642class OCUVectorElementExpr : public Expr { 643 Expr *Base; 644 IdentifierInfo &Accessor; 645 SourceLocation AccessorLoc; 646public: 647 enum ElementType { 648 Point, // xywz 649 Color, // rgba 650 Texture // stpq 651 }; 652 OCUVectorElementExpr(QualType ty, Expr *base, IdentifierInfo &accessor, 653 SourceLocation loc) 654 : Expr(OCUVectorElementExprClass, ty), 655 Base(base), Accessor(accessor), AccessorLoc(loc) {} 656 657 const Expr *getBase() const { return Base; } 658 Expr *getBase() { return Base; } 659 660 IdentifierInfo &getAccessor() const { return Accessor; } 661 662 /// getNumElements - Get the number of components being selected. 663 unsigned getNumElements() const; 664 665 /// getElementType - Determine whether the components of this access are 666 /// "point" "color" or "texture" elements. 667 ElementType getElementType() const; 668 669 /// containsDuplicateElements - Return true if any element access is 670 /// repeated. 671 bool containsDuplicateElements() const; 672 673 /// getEncodedElementAccess - Encode the elements accessed into a bit vector. 674 /// The encoding currently uses 2-bit bitfields, but clients should use the 675 /// accessors below to access them. 676 /// 677 unsigned getEncodedElementAccess() const; 678 679 /// getAccessedFieldNo - Given an encoded value and a result number, return 680 /// the input field number being accessed. 681 static unsigned getAccessedFieldNo(unsigned Idx, unsigned EncodedVal) { 682 return (EncodedVal >> (Idx*2)) & 3; 683 } 684 685 virtual SourceRange getSourceRange() const { 686 return SourceRange(getBase()->getLocStart(), AccessorLoc); 687 } 688 static bool classof(const Stmt *T) { 689 return T->getStmtClass() == OCUVectorElementExprClass; 690 } 691 static bool classof(const OCUVectorElementExpr *) { return true; } 692 693 // Iterators 694 virtual child_iterator child_begin(); 695 virtual child_iterator child_end(); 696}; 697 698/// CompoundLiteralExpr - [C99 6.5.2.5] 699/// 700class CompoundLiteralExpr : public Expr { 701 Expr *Init; 702public: 703 CompoundLiteralExpr(QualType ty, Expr *init) : 704 Expr(CompoundLiteralExprClass, ty), Init(init) {} 705 706 const Expr *getInitializer() const { return Init; } 707 Expr *getInitializer() { return Init; } 708 709 virtual SourceRange getSourceRange() const { 710 if (Init) 711 return Init->getSourceRange(); 712 return SourceRange(); 713 } 714 715 static bool classof(const Stmt *T) { 716 return T->getStmtClass() == CompoundLiteralExprClass; 717 } 718 static bool classof(const CompoundLiteralExpr *) { return true; } 719 720 // Iterators 721 virtual child_iterator child_begin(); 722 virtual child_iterator child_end(); 723}; 724 725/// ImplicitCastExpr - Allows us to explicitly represent implicit type 726/// conversions. For example: converting T[]->T*, void f()->void (*f)(), 727/// float->double, short->int, etc. 728/// 729class ImplicitCastExpr : public Expr { 730 Expr *Op; 731public: 732 ImplicitCastExpr(QualType ty, Expr *op) : 733 Expr(ImplicitCastExprClass, ty), Op(op) {} 734 735 Expr *getSubExpr() { return Op; } 736 const Expr *getSubExpr() const { return Op; } 737 738 virtual SourceRange getSourceRange() const { return Op->getSourceRange(); } 739 740 static bool classof(const Stmt *T) { 741 return T->getStmtClass() == ImplicitCastExprClass; 742 } 743 static bool classof(const ImplicitCastExpr *) { return true; } 744 745 // Iterators 746 virtual child_iterator child_begin(); 747 virtual child_iterator child_end(); 748 749 virtual void EmitImpl(llvm::Serializer& S) const; 750 static ImplicitCastExpr* CreateImpl(llvm::Deserializer& D); 751}; 752 753/// CastExpr - [C99 6.5.4] Cast Operators. 754/// 755class CastExpr : public Expr { 756 Expr *Op; 757 SourceLocation Loc; // the location of the left paren 758public: 759 CastExpr(QualType ty, Expr *op, SourceLocation l) : 760 Expr(CastExprClass, ty), Op(op), Loc(l) {} 761 762 SourceLocation getLParenLoc() const { return Loc; } 763 764 Expr *getSubExpr() const { return Op; } 765 766 virtual SourceRange getSourceRange() const { 767 return SourceRange(Loc, getSubExpr()->getSourceRange().getEnd()); 768 } 769 static bool classof(const Stmt *T) { 770 return T->getStmtClass() == CastExprClass; 771 } 772 static bool classof(const CastExpr *) { return true; } 773 774 // Iterators 775 virtual child_iterator child_begin(); 776 virtual child_iterator child_end(); 777 778 virtual void EmitImpl(llvm::Serializer& S) const; 779 static CastExpr* CreateImpl(llvm::Deserializer& D); 780}; 781 782class BinaryOperator : public Expr { 783public: 784 enum Opcode { 785 // Operators listed in order of precedence. 786 // Note that additions to this should also update the StmtVisitor class. 787 Mul, Div, Rem, // [C99 6.5.5] Multiplicative operators. 788 Add, Sub, // [C99 6.5.6] Additive operators. 789 Shl, Shr, // [C99 6.5.7] Bitwise shift operators. 790 LT, GT, LE, GE, // [C99 6.5.8] Relational operators. 791 EQ, NE, // [C99 6.5.9] Equality operators. 792 And, // [C99 6.5.10] Bitwise AND operator. 793 Xor, // [C99 6.5.11] Bitwise XOR operator. 794 Or, // [C99 6.5.12] Bitwise OR operator. 795 LAnd, // [C99 6.5.13] Logical AND operator. 796 LOr, // [C99 6.5.14] Logical OR operator. 797 Assign, MulAssign,// [C99 6.5.16] Assignment operators. 798 DivAssign, RemAssign, 799 AddAssign, SubAssign, 800 ShlAssign, ShrAssign, 801 AndAssign, XorAssign, 802 OrAssign, 803 Comma // [C99 6.5.17] Comma operator. 804 }; 805private: 806 enum { LHS, RHS, END_EXPR }; 807 Expr* SubExprs[END_EXPR]; 808 Opcode Opc; 809 SourceLocation OpLoc; 810public: 811 812 BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, 813 SourceLocation opLoc) 814 : Expr(BinaryOperatorClass, ResTy), Opc(opc), OpLoc(opLoc) { 815 SubExprs[LHS] = lhs; 816 SubExprs[RHS] = rhs; 817 assert(!isCompoundAssignmentOp() && 818 "Use ArithAssignBinaryOperator for compound assignments"); 819 } 820 821 SourceLocation getOperatorLoc() const { return OpLoc; } 822 Opcode getOpcode() const { return Opc; } 823 Expr *getLHS() const { return SubExprs[LHS]; } 824 Expr *getRHS() const { return SubExprs[RHS]; } 825 virtual SourceRange getSourceRange() const { 826 return SourceRange(getLHS()->getLocStart(), getRHS()->getLocEnd()); 827 } 828 829 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 830 /// corresponds to, e.g. "<<=". 831 static const char *getOpcodeStr(Opcode Op); 832 833 /// predicates to categorize the respective opcodes. 834 bool isMultiplicativeOp() const { return Opc >= Mul && Opc <= Rem; } 835 bool isAdditiveOp() const { return Opc == Add || Opc == Sub; } 836 bool isShiftOp() const { return Opc == Shl || Opc == Shr; } 837 bool isBitwiseOp() const { return Opc >= And && Opc <= Or; } 838 bool isRelationalOp() const { return Opc >= LT && Opc <= GE; } 839 bool isEqualityOp() const { return Opc == EQ || Opc == NE; } 840 bool isLogicalOp() const { return Opc == LAnd || Opc == LOr; } 841 bool isAssignmentOp() const { return Opc >= Assign && Opc <= OrAssign; } 842 bool isCompoundAssignmentOp() const { return Opc > Assign && Opc <= OrAssign;} 843 bool isShiftAssignOp() const { return Opc == ShlAssign || Opc == ShrAssign; } 844 845 static bool classof(const Stmt *S) { 846 return S->getStmtClass() == BinaryOperatorClass || 847 S->getStmtClass() == CompoundAssignOperatorClass; 848 } 849 static bool classof(const BinaryOperator *) { return true; } 850 851 // Iterators 852 virtual child_iterator child_begin(); 853 virtual child_iterator child_end(); 854 855 virtual void EmitImpl(llvm::Serializer& S) const; 856 static BinaryOperator* CreateImpl(llvm::Deserializer& D); 857 858protected: 859 BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, 860 SourceLocation oploc, bool dead) 861 : Expr(CompoundAssignOperatorClass, ResTy), Opc(opc), OpLoc(oploc) { 862 SubExprs[LHS] = lhs; 863 SubExprs[RHS] = rhs; 864 } 865}; 866 867/// CompoundAssignOperator - For compound assignments (e.g. +=), we keep 868/// track of the type the operation is performed in. Due to the semantics of 869/// these operators, the operands are promoted, the aritmetic performed, an 870/// implicit conversion back to the result type done, then the assignment takes 871/// place. This captures the intermediate type which the computation is done 872/// in. 873class CompoundAssignOperator : public BinaryOperator { 874 QualType ComputationType; 875public: 876 CompoundAssignOperator(Expr *lhs, Expr *rhs, Opcode opc, 877 QualType ResType, QualType CompType, 878 SourceLocation OpLoc) 879 : BinaryOperator(lhs, rhs, opc, ResType, OpLoc, true), 880 ComputationType(CompType) { 881 assert(isCompoundAssignmentOp() && 882 "Only should be used for compound assignments"); 883 } 884 885 QualType getComputationType() const { return ComputationType; } 886 887 static bool classof(const CompoundAssignOperator *) { return true; } 888 static bool classof(const Stmt *S) { 889 return S->getStmtClass() == CompoundAssignOperatorClass; 890 } 891 892 virtual void EmitImpl(llvm::Serializer& S) const; 893 static CompoundAssignOperator* CreateImpl(llvm::Deserializer& D); 894}; 895 896/// ConditionalOperator - The ?: operator. Note that LHS may be null when the 897/// GNU "missing LHS" extension is in use. 898/// 899class ConditionalOperator : public Expr { 900 enum { COND, LHS, RHS, END_EXPR }; 901 Expr* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. 902public: 903 ConditionalOperator(Expr *cond, Expr *lhs, Expr *rhs, QualType t) 904 : Expr(ConditionalOperatorClass, t) { 905 SubExprs[COND] = cond; 906 SubExprs[LHS] = lhs; 907 SubExprs[RHS] = rhs; 908 } 909 910 Expr *getCond() const { return SubExprs[COND]; } 911 Expr *getLHS() const { return SubExprs[LHS]; } 912 Expr *getRHS() const { return SubExprs[RHS]; } 913 914 virtual SourceRange getSourceRange() const { 915 return SourceRange(getCond()->getLocStart(), getRHS()->getLocEnd()); 916 } 917 static bool classof(const Stmt *T) { 918 return T->getStmtClass() == ConditionalOperatorClass; 919 } 920 static bool classof(const ConditionalOperator *) { return true; } 921 922 // Iterators 923 virtual child_iterator child_begin(); 924 virtual child_iterator child_end(); 925 926 virtual void EmitImpl(llvm::Serializer& S) const; 927 static ConditionalOperator* CreateImpl(llvm::Deserializer& D); 928}; 929 930/// AddrLabelExpr - The GNU address of label extension, representing &&label. 931class AddrLabelExpr : public Expr { 932 SourceLocation AmpAmpLoc, LabelLoc; 933 LabelStmt *Label; 934public: 935 AddrLabelExpr(SourceLocation AALoc, SourceLocation LLoc, LabelStmt *L, 936 QualType t) 937 : Expr(AddrLabelExprClass, t), AmpAmpLoc(AALoc), LabelLoc(LLoc), Label(L) {} 938 939 virtual SourceRange getSourceRange() const { 940 return SourceRange(AmpAmpLoc, LabelLoc); 941 } 942 943 LabelStmt *getLabel() const { return Label; } 944 945 static bool classof(const Stmt *T) { 946 return T->getStmtClass() == AddrLabelExprClass; 947 } 948 static bool classof(const AddrLabelExpr *) { return true; } 949 950 // Iterators 951 virtual child_iterator child_begin(); 952 virtual child_iterator child_end(); 953 954 virtual void EmitImpl(llvm::Serializer& S) const; 955 static AddrLabelExpr* CreateImpl(llvm::Deserializer& D); 956}; 957 958/// StmtExpr - This is the GNU Statement Expression extension: ({int X=4; X;}). 959/// The StmtExpr contains a single CompoundStmt node, which it evaluates and 960/// takes the value of the last subexpression. 961class StmtExpr : public Expr { 962 CompoundStmt *SubStmt; 963 SourceLocation LParenLoc, RParenLoc; 964public: 965 StmtExpr(CompoundStmt *substmt, QualType T, 966 SourceLocation lp, SourceLocation rp) : 967 Expr(StmtExprClass, T), SubStmt(substmt), LParenLoc(lp), RParenLoc(rp) { } 968 969 CompoundStmt *getSubStmt() { return SubStmt; } 970 const CompoundStmt *getSubStmt() const { return SubStmt; } 971 972 virtual SourceRange getSourceRange() const { 973 return SourceRange(LParenLoc, RParenLoc); 974 } 975 976 static bool classof(const Stmt *T) { 977 return T->getStmtClass() == StmtExprClass; 978 } 979 static bool classof(const StmtExpr *) { return true; } 980 981 // Iterators 982 virtual child_iterator child_begin(); 983 virtual child_iterator child_end(); 984 985 virtual void EmitImpl(llvm::Serializer& S) const; 986 static StmtExpr* CreateImpl(llvm::Deserializer& D); 987}; 988 989/// TypesCompatibleExpr - GNU builtin-in function __builtin_type_compatible_p. 990/// This AST node represents a function that returns 1 if two *types* (not 991/// expressions) are compatible. The result of this built-in function can be 992/// used in integer constant expressions. 993class TypesCompatibleExpr : public Expr { 994 QualType Type1; 995 QualType Type2; 996 SourceLocation BuiltinLoc, RParenLoc; 997public: 998 TypesCompatibleExpr(QualType ReturnType, SourceLocation BLoc, 999 QualType t1, QualType t2, SourceLocation RP) : 1000 Expr(TypesCompatibleExprClass, ReturnType), Type1(t1), Type2(t2), 1001 BuiltinLoc(BLoc), RParenLoc(RP) {} 1002 1003 QualType getArgType1() const { return Type1; } 1004 QualType getArgType2() const { return Type2; } 1005 1006 virtual SourceRange getSourceRange() const { 1007 return SourceRange(BuiltinLoc, RParenLoc); 1008 } 1009 static bool classof(const Stmt *T) { 1010 return T->getStmtClass() == TypesCompatibleExprClass; 1011 } 1012 static bool classof(const TypesCompatibleExpr *) { return true; } 1013 1014 // Iterators 1015 virtual child_iterator child_begin(); 1016 virtual child_iterator child_end(); 1017}; 1018 1019/// ChooseExpr - GNU builtin-in function __builtin_choose_expr. 1020/// This AST node is similar to the conditional operator (?:) in C, with 1021/// the following exceptions: 1022/// - the test expression much be a constant expression. 1023/// - the expression returned has it's type unaltered by promotion rules. 1024/// - does not evaluate the expression that was not chosen. 1025class ChooseExpr : public Expr { 1026 enum { COND, LHS, RHS, END_EXPR }; 1027 Expr* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. 1028 SourceLocation BuiltinLoc, RParenLoc; 1029public: 1030 ChooseExpr(SourceLocation BLoc, Expr *cond, Expr *lhs, Expr *rhs, QualType t, 1031 SourceLocation RP) 1032 : Expr(ChooseExprClass, t), 1033 BuiltinLoc(BLoc), RParenLoc(RP) { 1034 SubExprs[COND] = cond; 1035 SubExprs[LHS] = lhs; 1036 SubExprs[RHS] = rhs; 1037 } 1038 1039 /// isConditionTrue - Return true if the condition is true. This is always 1040 /// statically knowable for a well-formed choosexpr. 1041 bool isConditionTrue(ASTContext &C) const; 1042 1043 Expr *getCond() const { return SubExprs[COND]; } 1044 Expr *getLHS() const { return SubExprs[LHS]; } 1045 Expr *getRHS() const { return SubExprs[RHS]; } 1046 1047 virtual SourceRange getSourceRange() const { 1048 return SourceRange(BuiltinLoc, RParenLoc); 1049 } 1050 static bool classof(const Stmt *T) { 1051 return T->getStmtClass() == ChooseExprClass; 1052 } 1053 static bool classof(const ChooseExpr *) { return true; } 1054 1055 // Iterators 1056 virtual child_iterator child_begin(); 1057 virtual child_iterator child_end(); 1058}; 1059 1060/// VAArgExpr, used for the builtin function __builtin_va_start. 1061class VAArgExpr : public Expr { 1062 Expr *Val; 1063 SourceLocation BuiltinLoc, RParenLoc; 1064public: 1065 VAArgExpr(SourceLocation BLoc, Expr* e, QualType t, SourceLocation RPLoc) 1066 : Expr(VAArgExprClass, t), 1067 Val(e), 1068 BuiltinLoc(BLoc), 1069 RParenLoc(RPLoc) { } 1070 1071 const Expr *getSubExpr() const { return Val; } 1072 Expr *getSubExpr() { return Val; } 1073 virtual SourceRange getSourceRange() const { 1074 return SourceRange(BuiltinLoc, RParenLoc); 1075 } 1076 static bool classof(const Stmt *T) { 1077 return T->getStmtClass() == VAArgExprClass; 1078 } 1079 static bool classof(const VAArgExpr *) { return true; } 1080 1081 // Iterators 1082 virtual child_iterator child_begin(); 1083 virtual child_iterator child_end(); 1084}; 1085 1086/// InitListExpr, used for struct and array initializers. 1087class InitListExpr : public Expr { 1088 Expr **InitExprs; 1089 unsigned NumInits; 1090 SourceLocation LBraceLoc, RBraceLoc; 1091public: 1092 InitListExpr(SourceLocation lbraceloc, Expr **initexprs, unsigned numinits, 1093 SourceLocation rbraceloc); 1094 ~InitListExpr() { 1095 delete [] InitExprs; 1096 } 1097 1098 unsigned getNumInits() const { return NumInits; } 1099 1100 const Expr* getInit(unsigned Init) const { 1101 assert(Init < NumInits && "Initializer access out of range!"); 1102 return InitExprs[Init]; 1103 } 1104 1105 Expr* getInit(unsigned Init) { 1106 assert(Init < NumInits && "Initializer access out of range!"); 1107 return InitExprs[Init]; 1108 } 1109 1110 void setInit(unsigned Init, Expr *expr) { 1111 assert(Init < NumInits && "Initializer access out of range!"); 1112 InitExprs[Init] = expr; 1113 } 1114 1115 virtual SourceRange getSourceRange() const { 1116 return SourceRange(LBraceLoc, RBraceLoc); 1117 } 1118 static bool classof(const Stmt *T) { 1119 return T->getStmtClass() == InitListExprClass; 1120 } 1121 static bool classof(const InitListExpr *) { return true; } 1122 1123 // Iterators 1124 virtual child_iterator child_begin(); 1125 virtual child_iterator child_end(); 1126}; 1127 1128/// ObjCStringLiteral, used for Objective-C string literals 1129/// i.e. @"foo". 1130class ObjCStringLiteral : public Expr { 1131 StringLiteral *String; 1132 SourceLocation AtLoc; 1133public: 1134 ObjCStringLiteral(StringLiteral *SL, QualType T, SourceLocation L) 1135 : Expr(ObjCStringLiteralClass, T), String(SL), AtLoc(L) {} 1136 1137 StringLiteral* getString() { return String; } 1138 1139 const StringLiteral* getString() const { return String; } 1140 1141 virtual SourceRange getSourceRange() const { 1142 return SourceRange(AtLoc, String->getLocEnd()); 1143 } 1144 1145 static bool classof(const Stmt *T) { 1146 return T->getStmtClass() == ObjCStringLiteralClass; 1147 } 1148 static bool classof(const ObjCStringLiteral *) { return true; } 1149 1150 // Iterators 1151 virtual child_iterator child_begin(); 1152 virtual child_iterator child_end(); 1153}; 1154 1155/// ObjCEncodeExpr, used for @encode in Objective-C. 1156class ObjCEncodeExpr : public Expr { 1157 QualType EncType; 1158 SourceLocation AtLoc, RParenLoc; 1159public: 1160 ObjCEncodeExpr(QualType T, QualType ET, 1161 SourceLocation at, SourceLocation rp) 1162 : Expr(ObjCEncodeExprClass, T), EncType(ET), AtLoc(at), RParenLoc(rp) {} 1163 1164 SourceLocation getAtLoc() const { return AtLoc; } 1165 SourceLocation getRParenLoc() const { return RParenLoc; } 1166 1167 SourceRange getSourceRange() const { return SourceRange(AtLoc, RParenLoc); } 1168 1169 QualType getEncodedType() const { return EncType; } 1170 1171 static bool classof(const Stmt *T) { 1172 return T->getStmtClass() == ObjCEncodeExprClass; 1173 } 1174 static bool classof(const ObjCEncodeExpr *) { return true; } 1175 1176 // Iterators 1177 virtual child_iterator child_begin(); 1178 virtual child_iterator child_end(); 1179}; 1180 1181/// ObjCSelectorExpr used for @selector in Objective-C. 1182class ObjCSelectorExpr : public Expr { 1183 1184 Selector SelName; 1185 1186 SourceLocation AtLoc, RParenLoc; 1187public: 1188 ObjCSelectorExpr(QualType T, Selector selInfo, 1189 SourceLocation at, SourceLocation rp) 1190 : Expr(ObjCSelectorExprClass, T), SelName(selInfo), 1191 AtLoc(at), RParenLoc(rp) {} 1192 1193 const Selector &getSelector() const { return SelName; } 1194 Selector &getSelector() { return SelName; } 1195 1196 SourceLocation getAtLoc() const { return AtLoc; } 1197 SourceLocation getRParenLoc() const { return RParenLoc; } 1198 SourceRange getSourceRange() const { return SourceRange(AtLoc, RParenLoc); } 1199 1200 /// getNumArgs - Return the number of actual arguments to this call. 1201 unsigned getNumArgs() const { return SelName.getNumArgs(); } 1202 1203 static bool classof(const Stmt *T) { 1204 return T->getStmtClass() == ObjCSelectorExprClass; 1205 } 1206 static bool classof(const ObjCSelectorExpr *) { return true; } 1207 1208 // Iterators 1209 virtual child_iterator child_begin(); 1210 virtual child_iterator child_end(); 1211 1212}; 1213 1214/// ObjCProtocolExpr used for protocol in Objective-C. 1215class ObjCProtocolExpr : public Expr { 1216 1217 ObjcProtocolDecl *Protocol; 1218 1219 SourceLocation AtLoc, RParenLoc; 1220 public: 1221 ObjCProtocolExpr(QualType T, ObjcProtocolDecl *protocol, 1222 SourceLocation at, SourceLocation rp) 1223 : Expr(ObjCProtocolExprClass, T), Protocol(protocol), 1224 AtLoc(at), RParenLoc(rp) {} 1225 1226 ObjcProtocolDecl *getProtocol() const { return Protocol; } 1227 1228 SourceLocation getAtLoc() const { return AtLoc; } 1229 SourceLocation getRParenLoc() const { return RParenLoc; } 1230 SourceRange getSourceRange() const { return SourceRange(AtLoc, RParenLoc); } 1231 1232 static bool classof(const Stmt *T) { 1233 return T->getStmtClass() == ObjCProtocolExprClass; 1234 } 1235 static bool classof(const ObjCProtocolExpr *) { return true; } 1236 1237 // Iterators 1238 virtual child_iterator child_begin(); 1239 virtual child_iterator child_end(); 1240 1241}; 1242 1243/// ObjCIvarRefExpr - A reference to an ObjC instance variable. 1244class ObjCIvarRefExpr : public Expr { 1245 class ObjcIvarDecl *D; 1246 SourceLocation Loc; 1247 Expr *Base; 1248 bool IsArrow; // True if this is "X->F", false if this is "X.F". 1249 1250public: 1251 ObjCIvarRefExpr(ObjcIvarDecl *d, QualType t, SourceLocation l, Expr *base=0, 1252 bool arrow = false) : 1253 Expr(ObjCIvarRefExprClass, t), D(d), Loc(l), Base(base), IsArrow(arrow) {} 1254 1255 ObjcIvarDecl *getDecl() { return D; } 1256 const ObjcIvarDecl *getDecl() const { return D; } 1257 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 1258 Expr *const getBase() const { return Base; } 1259 const bool isArrow() const { return IsArrow; } 1260 1261 static bool classof(const Stmt *T) { 1262 return T->getStmtClass() == ObjCIvarRefExprClass; 1263 } 1264 static bool classof(const ObjCIvarRefExpr *) { return true; } 1265 1266 // Iterators 1267 virtual child_iterator child_begin(); 1268 virtual child_iterator child_end(); 1269 1270 virtual void EmitImpl(llvm::Serializer& S) const; 1271 static ObjCIvarRefExpr* CreateImpl(llvm::Deserializer& D); 1272}; 1273 1274class ObjCMessageExpr : public Expr { 1275 enum { RECEIVER=0, ARGS_START=1 }; 1276 1277 Expr **SubExprs; 1278 1279 // A unigue name for this message. 1280 Selector SelName; 1281 1282 // A method prototype for this message (optional). 1283 // FIXME: Since method decls contain the selector, and most messages have a 1284 // prototype, consider devising a scheme for unifying SelName/MethodProto. 1285 ObjcMethodDecl *MethodProto; 1286 1287 IdentifierInfo *ClassName; // optional - 0 for instance messages. 1288 1289 SourceLocation LBracloc, RBracloc; 1290public: 1291 // constructor for class messages. 1292 // FIXME: clsName should be typed to ObjCInterfaceType 1293 ObjCMessageExpr(IdentifierInfo *clsName, Selector selInfo, 1294 QualType retType, ObjcMethodDecl *methDecl, 1295 SourceLocation LBrac, SourceLocation RBrac, 1296 Expr **ArgExprs); 1297 // constructor for instance messages. 1298 ObjCMessageExpr(Expr *receiver, Selector selInfo, 1299 QualType retType, ObjcMethodDecl *methDecl, 1300 SourceLocation LBrac, SourceLocation RBrac, 1301 Expr **ArgExprs); 1302 ~ObjCMessageExpr() { 1303 delete [] SubExprs; 1304 } 1305 1306 const Expr *getReceiver() const { return SubExprs[RECEIVER]; } 1307 Expr *getReceiver() { return SubExprs[RECEIVER]; } 1308 1309 const Selector &getSelector() const { return SelName; } 1310 Selector &getSelector() { return SelName; } 1311 1312 const ObjcMethodDecl *getMethodDecl() const { return MethodProto; } 1313 ObjcMethodDecl *getMethodDecl() { return MethodProto; } 1314 1315 const IdentifierInfo *getClassName() const { return ClassName; } 1316 IdentifierInfo *getClassName() { return ClassName; } 1317 1318 /// getNumArgs - Return the number of actual arguments to this call. 1319 unsigned getNumArgs() const { return SelName.getNumArgs(); } 1320 1321/// getArg - Return the specified argument. 1322 Expr *getArg(unsigned Arg) { 1323 assert(Arg < SelName.getNumArgs() && "Arg access out of range!"); 1324 return SubExprs[Arg+ARGS_START]; 1325 } 1326 const Expr *getArg(unsigned Arg) const { 1327 assert(Arg < SelName.getNumArgs() && "Arg access out of range!"); 1328 return SubExprs[Arg+ARGS_START]; 1329 } 1330 /// setArg - Set the specified argument. 1331 void setArg(unsigned Arg, Expr *ArgExpr) { 1332 assert(Arg < SelName.getNumArgs() && "Arg access out of range!"); 1333 SubExprs[Arg+ARGS_START] = ArgExpr; 1334 } 1335 SourceRange getSourceRange() const { return SourceRange(LBracloc, RBracloc); } 1336 1337 static bool classof(const Stmt *T) { 1338 return T->getStmtClass() == ObjCMessageExprClass; 1339 } 1340 static bool classof(const ObjCMessageExpr *) { return true; } 1341 1342 // Iterators 1343 virtual child_iterator child_begin(); 1344 virtual child_iterator child_end(); 1345}; 1346 1347} // end namespace clang 1348 1349#endif 1350