Expr.h revision 2dc9ac73a8a34cabf261a81a1653d7379065ac61
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 static bool classof(const Stmt *T) { 109 return T->getStmtClass() >= firstExprConstant && 110 T->getStmtClass() <= lastExprConstant; 111 } 112 static bool classof(const Expr *) { return true; } 113 114 static inline Expr* Materialize(llvm::Deserializer& D) { 115 return cast<Expr>(Stmt::Materialize(D)); 116 } 117}; 118 119//===----------------------------------------------------------------------===// 120// Primary Expressions. 121//===----------------------------------------------------------------------===// 122 123/// DeclRefExpr - [C99 6.5.1p2] - A reference to a declared variable, function, 124/// enum, etc. 125class DeclRefExpr : public Expr { 126 ValueDecl *D; 127 SourceLocation Loc; 128public: 129 DeclRefExpr(ValueDecl *d, QualType t, SourceLocation l) : 130 Expr(DeclRefExprClass, t), D(d), Loc(l) {} 131 132 ValueDecl *getDecl() { return D; } 133 const ValueDecl *getDecl() const { return D; } 134 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 135 136 137 static bool classof(const Stmt *T) { 138 return T->getStmtClass() == DeclRefExprClass; 139 } 140 static bool classof(const DeclRefExpr *) { return true; } 141 142 // Iterators 143 virtual child_iterator child_begin(); 144 virtual child_iterator child_end(); 145 146 virtual void directEmit(llvm::Serializer& S) const; 147 static DeclRefExpr* directMaterialize(llvm::Deserializer& D); 148}; 149 150/// PreDefinedExpr - [C99 6.4.2.2] - A pre-defined identifier such as __func__. 151class PreDefinedExpr : public Expr { 152public: 153 enum IdentType { 154 Func, 155 Function, 156 PrettyFunction 157 }; 158 159private: 160 SourceLocation Loc; 161 IdentType Type; 162public: 163 PreDefinedExpr(SourceLocation l, QualType type, IdentType IT) 164 : Expr(PreDefinedExprClass, type), Loc(l), Type(IT) {} 165 166 IdentType getIdentType() const { return Type; } 167 168 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 169 170 static bool classof(const Stmt *T) { 171 return T->getStmtClass() == PreDefinedExprClass; 172 } 173 static bool classof(const PreDefinedExpr *) { return true; } 174 175 // Iterators 176 virtual child_iterator child_begin(); 177 virtual child_iterator child_end(); 178}; 179 180class IntegerLiteral : public Expr { 181 llvm::APInt Value; 182 SourceLocation Loc; 183public: 184 // type should be IntTy, LongTy, LongLongTy, UnsignedIntTy, UnsignedLongTy, 185 // or UnsignedLongLongTy 186 IntegerLiteral(const llvm::APInt &V, QualType type, SourceLocation l) 187 : Expr(IntegerLiteralClass, type), Value(V), Loc(l) { 188 assert(type->isIntegerType() && "Illegal type in IntegerLiteral"); 189 } 190 const llvm::APInt &getValue() const { return Value; } 191 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 192 193 static bool classof(const Stmt *T) { 194 return T->getStmtClass() == IntegerLiteralClass; 195 } 196 static bool classof(const IntegerLiteral *) { return true; } 197 198 // Iterators 199 virtual child_iterator child_begin(); 200 virtual child_iterator child_end(); 201 202 virtual void directEmit(llvm::Serializer& S) const; 203 static IntegerLiteral* directMaterialize(llvm::Deserializer& D); 204}; 205 206class CharacterLiteral : public Expr { 207 unsigned Value; 208 SourceLocation Loc; 209public: 210 // type should be IntTy 211 CharacterLiteral(unsigned value, QualType type, SourceLocation l) 212 : Expr(CharacterLiteralClass, type), Value(value), Loc(l) { 213 } 214 SourceLocation getLoc() const { return Loc; } 215 216 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 217 218 unsigned getValue() const { return Value; } 219 220 static bool classof(const Stmt *T) { 221 return T->getStmtClass() == CharacterLiteralClass; 222 } 223 static bool classof(const CharacterLiteral *) { return true; } 224 225 // Iterators 226 virtual child_iterator child_begin(); 227 virtual child_iterator child_end(); 228}; 229 230class FloatingLiteral : public Expr { 231 llvm::APFloat Value; 232 SourceLocation Loc; 233public: 234 FloatingLiteral(const llvm::APFloat &V, QualType Type, SourceLocation L) 235 : Expr(FloatingLiteralClass, Type), Value(V), Loc(L) {} 236 237 const llvm::APFloat &getValue() const { return Value; } 238 239 /// getValueAsDouble - This returns the value as an inaccurate double. Note 240 /// that this may cause loss of precision, but is useful for debugging dumps 241 /// etc. 242 double getValueAsDouble() const { 243 // FIXME: We need something for long double here. 244 if (cast<BuiltinType>(getType())->getKind() == BuiltinType::Float) 245 return Value.convertToFloat(); 246 else 247 return Value.convertToDouble(); 248 } 249 250 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 251 252 static bool classof(const Stmt *T) { 253 return T->getStmtClass() == FloatingLiteralClass; 254 } 255 static bool classof(const FloatingLiteral *) { return true; } 256 257 // Iterators 258 virtual child_iterator child_begin(); 259 virtual child_iterator child_end(); 260}; 261 262/// ImaginaryLiteral - We support imaginary integer and floating point literals, 263/// like "1.0i". We represent these as a wrapper around FloatingLiteral and 264/// IntegerLiteral classes. Instances of this class always have a Complex type 265/// whose element type matches the subexpression. 266/// 267class ImaginaryLiteral : public Expr { 268 Expr *Val; 269public: 270 ImaginaryLiteral(Expr *val, QualType Ty) 271 : Expr(ImaginaryLiteralClass, Ty), Val(val) {} 272 273 const Expr *getSubExpr() const { return Val; } 274 Expr *getSubExpr() { return Val; } 275 276 virtual SourceRange getSourceRange() const { return Val->getSourceRange(); } 277 static bool classof(const Stmt *T) { 278 return T->getStmtClass() == ImaginaryLiteralClass; 279 } 280 static bool classof(const ImaginaryLiteral *) { return true; } 281 282 // Iterators 283 virtual child_iterator child_begin(); 284 virtual child_iterator child_end(); 285}; 286 287/// StringLiteral - This represents a string literal expression, e.g. "foo" 288/// or L"bar" (wide strings). The actual string is returned by getStrData() 289/// is NOT null-terminated, and the length of the string is determined by 290/// calling getByteLength(). 291class StringLiteral : public Expr { 292 const char *StrData; 293 unsigned ByteLength; 294 bool IsWide; 295 // if the StringLiteral was composed using token pasting, both locations 296 // are needed. If not (the common case), firstTokLoc == lastTokLoc. 297 // FIXME: if space becomes an issue, we should create a sub-class. 298 SourceLocation firstTokLoc, lastTokLoc; 299public: 300 StringLiteral(const char *strData, unsigned byteLength, bool Wide, 301 QualType t, SourceLocation b, SourceLocation e); 302 virtual ~StringLiteral(); 303 304 const char *getStrData() const { return StrData; } 305 unsigned getByteLength() const { return ByteLength; } 306 bool isWide() const { return IsWide; } 307 308 virtual SourceRange getSourceRange() const { 309 return SourceRange(firstTokLoc,lastTokLoc); 310 } 311 static bool classof(const Stmt *T) { 312 return T->getStmtClass() == StringLiteralClass; 313 } 314 static bool classof(const StringLiteral *) { return true; } 315 316 // Iterators 317 virtual child_iterator child_begin(); 318 virtual child_iterator child_end(); 319}; 320 321/// ParenExpr - This represents a parethesized expression, e.g. "(1)". This 322/// AST node is only formed if full location information is requested. 323class ParenExpr : public Expr { 324 SourceLocation L, R; 325 Expr *Val; 326public: 327 ParenExpr(SourceLocation l, SourceLocation r, Expr *val) 328 : Expr(ParenExprClass, val->getType()), L(l), R(r), Val(val) {} 329 330 const Expr *getSubExpr() const { return Val; } 331 Expr *getSubExpr() { return Val; } 332 SourceRange getSourceRange() const { return SourceRange(L, R); } 333 334 static bool classof(const Stmt *T) { 335 return T->getStmtClass() == ParenExprClass; 336 } 337 static bool classof(const ParenExpr *) { return true; } 338 339 // Iterators 340 virtual child_iterator child_begin(); 341 virtual child_iterator child_end(); 342}; 343 344 345/// UnaryOperator - This represents the unary-expression's (except sizeof of 346/// types), the postinc/postdec operators from postfix-expression, and various 347/// extensions. 348/// 349/// Notes on various nodes: 350/// 351/// Real/Imag - These return the real/imag part of a complex operand. If 352/// applied to a non-complex value, the former returns its operand and the 353/// later returns zero in the type of the operand. 354/// 355/// __builtin_offsetof(type, a.b[10]) is represented as a unary operator whose 356/// subexpression is a compound literal with the various MemberExpr and 357/// ArraySubscriptExpr's applied to it. 358/// 359class UnaryOperator : public Expr { 360public: 361 // Note that additions to this should also update the StmtVisitor class. 362 enum Opcode { 363 PostInc, PostDec, // [C99 6.5.2.4] Postfix increment and decrement operators 364 PreInc, PreDec, // [C99 6.5.3.1] Prefix increment and decrement operators. 365 AddrOf, Deref, // [C99 6.5.3.2] Address and indirection operators. 366 Plus, Minus, // [C99 6.5.3.3] Unary arithmetic operators. 367 Not, LNot, // [C99 6.5.3.3] Unary arithmetic operators. 368 SizeOf, AlignOf, // [C99 6.5.3.4] Sizeof (expr, not type) operator. 369 Real, Imag, // "__real expr"/"__imag expr" Extension. 370 Extension, // __extension__ marker. 371 OffsetOf // __builtin_offsetof 372 }; 373private: 374 Expr *Val; 375 Opcode Opc; 376 SourceLocation Loc; 377public: 378 379 UnaryOperator(Expr *input, Opcode opc, QualType type, SourceLocation l) 380 : Expr(UnaryOperatorClass, type), Val(input), Opc(opc), Loc(l) {} 381 382 Opcode getOpcode() const { return Opc; } 383 Expr *getSubExpr() const { return Val; } 384 385 /// getOperatorLoc - Return the location of the operator. 386 SourceLocation getOperatorLoc() const { return Loc; } 387 388 /// isPostfix - Return true if this is a postfix operation, like x++. 389 static bool isPostfix(Opcode Op); 390 391 bool isPostfix() const { return isPostfix(Opc); } 392 bool isIncrementDecrementOp() const { return Opc>=PostInc && Opc<=PreDec; } 393 bool isSizeOfAlignOfOp() const { return Opc == SizeOf || Opc == AlignOf; } 394 static bool isArithmeticOp(Opcode Op) { return Op >= Plus && Op <= LNot; } 395 396 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 397 /// corresponds to, e.g. "sizeof" or "[pre]++" 398 static const char *getOpcodeStr(Opcode Op); 399 400 virtual SourceRange getSourceRange() const { 401 if (isPostfix()) 402 return SourceRange(Val->getLocStart(), Loc); 403 else 404 return SourceRange(Loc, Val->getLocEnd()); 405 } 406 virtual SourceLocation getExprLoc() const { return Loc; } 407 408 static bool classof(const Stmt *T) { 409 return T->getStmtClass() == UnaryOperatorClass; 410 } 411 static bool classof(const UnaryOperator *) { return true; } 412 413 // Iterators 414 virtual child_iterator child_begin(); 415 virtual child_iterator child_end(); 416}; 417 418/// SizeOfAlignOfTypeExpr - [C99 6.5.3.4] - This is only for sizeof/alignof of 419/// *types*. sizeof(expr) is handled by UnaryOperator. 420class SizeOfAlignOfTypeExpr : public Expr { 421 bool isSizeof; // true if sizeof, false if alignof. 422 QualType Ty; 423 SourceLocation OpLoc, RParenLoc; 424public: 425 SizeOfAlignOfTypeExpr(bool issizeof, QualType argType, QualType resultType, 426 SourceLocation op, SourceLocation rp) : 427 Expr(SizeOfAlignOfTypeExprClass, resultType), 428 isSizeof(issizeof), Ty(argType), OpLoc(op), RParenLoc(rp) {} 429 430 bool isSizeOf() const { return isSizeof; } 431 QualType getArgumentType() const { return Ty; } 432 433 SourceLocation getOperatorLoc() const { return OpLoc; } 434 SourceRange getSourceRange() const { return SourceRange(OpLoc, RParenLoc); } 435 436 static bool classof(const Stmt *T) { 437 return T->getStmtClass() == SizeOfAlignOfTypeExprClass; 438 } 439 static bool classof(const SizeOfAlignOfTypeExpr *) { return true; } 440 441 // Iterators 442 virtual child_iterator child_begin(); 443 virtual child_iterator child_end(); 444}; 445 446//===----------------------------------------------------------------------===// 447// Postfix Operators. 448//===----------------------------------------------------------------------===// 449 450/// ArraySubscriptExpr - [C99 6.5.2.1] Array Subscripting. 451class ArraySubscriptExpr : public Expr { 452 enum { LHS, RHS, END_EXPR=2 }; 453 Expr* SubExprs[END_EXPR]; 454 SourceLocation RBracketLoc; 455public: 456 ArraySubscriptExpr(Expr *lhs, Expr *rhs, QualType t, 457 SourceLocation rbracketloc) 458 : Expr(ArraySubscriptExprClass, t), RBracketLoc(rbracketloc) { 459 SubExprs[LHS] = lhs; 460 SubExprs[RHS] = rhs; 461 } 462 463 /// An array access can be written A[4] or 4[A] (both are equivalent). 464 /// - getBase() and getIdx() always present the normalized view: A[4]. 465 /// In this case getBase() returns "A" and getIdx() returns "4". 466 /// - getLHS() and getRHS() present the syntactic view. e.g. for 467 /// 4[A] getLHS() returns "4". 468 469 Expr *getLHS() { return SubExprs[LHS]; } 470 const Expr *getLHS() const { return SubExprs[LHS]; } 471 472 Expr *getRHS() { return SubExprs[RHS]; } 473 const Expr *getRHS() const { return SubExprs[RHS]; } 474 475 Expr *getBase() { 476 return (getLHS()->getType()->isIntegerType()) ? getRHS() : getLHS(); 477 } 478 479 const Expr *getBase() const { 480 return (getLHS()->getType()->isIntegerType()) ? getRHS() : getLHS(); 481 } 482 483 Expr *getIdx() { 484 return (getLHS()->getType()->isIntegerType()) ? getLHS() : getRHS(); 485 } 486 487 const Expr *getIdx() const { 488 return (getLHS()->getType()->isIntegerType()) ? getLHS() : getRHS(); 489 } 490 491 492 SourceRange getSourceRange() const { 493 return SourceRange(getLHS()->getLocStart(), RBracketLoc); 494 } 495 virtual SourceLocation getExprLoc() const { return RBracketLoc; } 496 497 static bool classof(const Stmt *T) { 498 return T->getStmtClass() == ArraySubscriptExprClass; 499 } 500 static bool classof(const ArraySubscriptExpr *) { return true; } 501 502 // Iterators 503 virtual child_iterator child_begin(); 504 virtual child_iterator child_end(); 505}; 506 507 508/// CallExpr - [C99 6.5.2.2] Function Calls. 509/// 510class CallExpr : public Expr { 511 enum { FN=0, ARGS_START=1 }; 512 Expr **SubExprs; 513 unsigned NumArgs; 514 SourceLocation RParenLoc; 515public: 516 CallExpr(Expr *fn, Expr **args, unsigned numargs, QualType t, 517 SourceLocation rparenloc); 518 ~CallExpr() { 519 delete [] SubExprs; 520 } 521 522 const Expr *getCallee() const { return SubExprs[FN]; } 523 Expr *getCallee() { return SubExprs[FN]; } 524 525 /// getNumArgs - Return the number of actual arguments to this call. 526 /// 527 unsigned getNumArgs() const { return NumArgs; } 528 529 /// getArg - Return the specified argument. 530 Expr *getArg(unsigned Arg) { 531 assert(Arg < NumArgs && "Arg access out of range!"); 532 return SubExprs[Arg+ARGS_START]; 533 } 534 const Expr *getArg(unsigned Arg) const { 535 assert(Arg < NumArgs && "Arg access out of range!"); 536 return SubExprs[Arg+ARGS_START]; 537 } 538 /// setArg - Set the specified argument. 539 void setArg(unsigned Arg, Expr *ArgExpr) { 540 assert(Arg < NumArgs && "Arg access out of range!"); 541 SubExprs[Arg+ARGS_START] = ArgExpr; 542 } 543 /// getNumCommas - Return the number of commas that must have been present in 544 /// this function call. 545 unsigned getNumCommas() const { return NumArgs ? NumArgs - 1 : 0; } 546 547 bool isBuiltinClassifyType(llvm::APSInt &Result) const; 548 549 SourceRange getSourceRange() const { 550 return SourceRange(getCallee()->getLocStart(), RParenLoc); 551 } 552 553 static bool classof(const Stmt *T) { 554 return T->getStmtClass() == CallExprClass; 555 } 556 static bool classof(const CallExpr *) { return true; } 557 558 // Iterators 559 virtual child_iterator child_begin(); 560 virtual child_iterator child_end(); 561}; 562 563/// MemberExpr - [C99 6.5.2.3] Structure and Union Members. 564/// 565class MemberExpr : public Expr { 566 Expr *Base; 567 FieldDecl *MemberDecl; 568 SourceLocation MemberLoc; 569 bool IsArrow; // True if this is "X->F", false if this is "X.F". 570public: 571 MemberExpr(Expr *base, bool isarrow, FieldDecl *memberdecl, SourceLocation l) 572 : Expr(MemberExprClass, memberdecl->getType()), 573 Base(base), MemberDecl(memberdecl), MemberLoc(l), IsArrow(isarrow) {} 574 575 Expr *getBase() const { return Base; } 576 FieldDecl *getMemberDecl() const { return MemberDecl; } 577 bool isArrow() const { return IsArrow; } 578 579 virtual SourceRange getSourceRange() const { 580 return SourceRange(getBase()->getLocStart(), MemberLoc); 581 } 582 virtual SourceLocation getExprLoc() const { return MemberLoc; } 583 584 static bool classof(const Stmt *T) { 585 return T->getStmtClass() == MemberExprClass; 586 } 587 static bool classof(const MemberExpr *) { return true; } 588 589 // Iterators 590 virtual child_iterator child_begin(); 591 virtual child_iterator child_end(); 592}; 593 594/// OCUVectorElementExpr - This represents access to specific elements of a 595/// vector, and may occur on the left hand side or right hand side. For example 596/// the following is legal: "V.xy = V.zw" if V is a 4 element ocu vector. 597/// 598class OCUVectorElementExpr : public Expr { 599 Expr *Base; 600 IdentifierInfo &Accessor; 601 SourceLocation AccessorLoc; 602public: 603 enum ElementType { 604 Point, // xywz 605 Color, // rgba 606 Texture // stpq 607 }; 608 OCUVectorElementExpr(QualType ty, Expr *base, IdentifierInfo &accessor, 609 SourceLocation loc) 610 : Expr(OCUVectorElementExprClass, ty), 611 Base(base), Accessor(accessor), AccessorLoc(loc) {} 612 613 const Expr *getBase() const { return Base; } 614 Expr *getBase() { return Base; } 615 616 IdentifierInfo &getAccessor() const { return Accessor; } 617 618 /// getNumElements - Get the number of components being selected. 619 unsigned getNumElements() const; 620 621 /// getElementType - Determine whether the components of this access are 622 /// "point" "color" or "texture" elements. 623 ElementType getElementType() const; 624 625 /// containsDuplicateElements - Return true if any element access is 626 /// repeated. 627 bool containsDuplicateElements() const; 628 629 /// getEncodedElementAccess - Encode the elements accessed into a bit vector. 630 /// The encoding currently uses 2-bit bitfields, but clients should use the 631 /// accessors below to access them. 632 /// 633 unsigned getEncodedElementAccess() const; 634 635 /// getAccessedFieldNo - Given an encoded value and a result number, return 636 /// the input field number being accessed. 637 static unsigned getAccessedFieldNo(unsigned Idx, unsigned EncodedVal) { 638 return (EncodedVal >> (Idx*2)) & 3; 639 } 640 641 virtual SourceRange getSourceRange() const { 642 return SourceRange(getBase()->getLocStart(), AccessorLoc); 643 } 644 static bool classof(const Stmt *T) { 645 return T->getStmtClass() == OCUVectorElementExprClass; 646 } 647 static bool classof(const OCUVectorElementExpr *) { return true; } 648 649 // Iterators 650 virtual child_iterator child_begin(); 651 virtual child_iterator child_end(); 652}; 653 654/// CompoundLiteralExpr - [C99 6.5.2.5] 655/// 656class CompoundLiteralExpr : public Expr { 657 Expr *Init; 658public: 659 CompoundLiteralExpr(QualType ty, Expr *init) : 660 Expr(CompoundLiteralExprClass, ty), Init(init) {} 661 662 const Expr *getInitializer() const { return Init; } 663 Expr *getInitializer() { return Init; } 664 665 virtual SourceRange getSourceRange() const { 666 if (Init) 667 return Init->getSourceRange(); 668 return SourceRange(); 669 } 670 671 static bool classof(const Stmt *T) { 672 return T->getStmtClass() == CompoundLiteralExprClass; 673 } 674 static bool classof(const CompoundLiteralExpr *) { return true; } 675 676 // Iterators 677 virtual child_iterator child_begin(); 678 virtual child_iterator child_end(); 679}; 680 681/// ImplicitCastExpr - Allows us to explicitly represent implicit type 682/// conversions. For example: converting T[]->T*, void f()->void (*f)(), 683/// float->double, short->int, etc. 684/// 685class ImplicitCastExpr : public Expr { 686 Expr *Op; 687public: 688 ImplicitCastExpr(QualType ty, Expr *op) : 689 Expr(ImplicitCastExprClass, ty), Op(op) {} 690 691 Expr *getSubExpr() { return Op; } 692 const Expr *getSubExpr() const { return Op; } 693 694 virtual SourceRange getSourceRange() const { return Op->getSourceRange(); } 695 696 static bool classof(const Stmt *T) { 697 return T->getStmtClass() == ImplicitCastExprClass; 698 } 699 static bool classof(const ImplicitCastExpr *) { return true; } 700 701 // Iterators 702 virtual child_iterator child_begin(); 703 virtual child_iterator child_end(); 704}; 705 706/// CastExpr - [C99 6.5.4] Cast Operators. 707/// 708class CastExpr : public Expr { 709 Expr *Op; 710 SourceLocation Loc; // the location of the left paren 711public: 712 CastExpr(QualType ty, Expr *op, SourceLocation l) : 713 Expr(CastExprClass, ty), Op(op), Loc(l) {} 714 715 SourceLocation getLParenLoc() const { return Loc; } 716 717 Expr *getSubExpr() const { return Op; } 718 719 virtual SourceRange getSourceRange() const { 720 return SourceRange(Loc, getSubExpr()->getSourceRange().getEnd()); 721 } 722 static bool classof(const Stmt *T) { 723 return T->getStmtClass() == CastExprClass; 724 } 725 static bool classof(const CastExpr *) { return true; } 726 727 // Iterators 728 virtual child_iterator child_begin(); 729 virtual child_iterator child_end(); 730}; 731 732class BinaryOperator : public Expr { 733public: 734 enum Opcode { 735 // Operators listed in order of precedence. 736 // Note that additions to this should also update the StmtVisitor class. 737 Mul, Div, Rem, // [C99 6.5.5] Multiplicative operators. 738 Add, Sub, // [C99 6.5.6] Additive operators. 739 Shl, Shr, // [C99 6.5.7] Bitwise shift operators. 740 LT, GT, LE, GE, // [C99 6.5.8] Relational operators. 741 EQ, NE, // [C99 6.5.9] Equality operators. 742 And, // [C99 6.5.10] Bitwise AND operator. 743 Xor, // [C99 6.5.11] Bitwise XOR operator. 744 Or, // [C99 6.5.12] Bitwise OR operator. 745 LAnd, // [C99 6.5.13] Logical AND operator. 746 LOr, // [C99 6.5.14] Logical OR operator. 747 Assign, MulAssign,// [C99 6.5.16] Assignment operators. 748 DivAssign, RemAssign, 749 AddAssign, SubAssign, 750 ShlAssign, ShrAssign, 751 AndAssign, XorAssign, 752 OrAssign, 753 Comma // [C99 6.5.17] Comma operator. 754 }; 755private: 756 enum { LHS, RHS, END_EXPR }; 757 Expr* SubExprs[END_EXPR]; 758 Opcode Opc; 759 SourceLocation OpLoc; 760public: 761 762 BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, 763 SourceLocation opLoc) 764 : Expr(BinaryOperatorClass, ResTy), Opc(opc), OpLoc(opLoc) { 765 SubExprs[LHS] = lhs; 766 SubExprs[RHS] = rhs; 767 assert(!isCompoundAssignmentOp() && 768 "Use ArithAssignBinaryOperator for compound assignments"); 769 } 770 771 SourceLocation getOperatorLoc() const { return OpLoc; } 772 Opcode getOpcode() const { return Opc; } 773 Expr *getLHS() const { return SubExprs[LHS]; } 774 Expr *getRHS() const { return SubExprs[RHS]; } 775 virtual SourceRange getSourceRange() const { 776 return SourceRange(getLHS()->getLocStart(), getRHS()->getLocEnd()); 777 } 778 779 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 780 /// corresponds to, e.g. "<<=". 781 static const char *getOpcodeStr(Opcode Op); 782 783 /// predicates to categorize the respective opcodes. 784 bool isMultiplicativeOp() const { return Opc >= Mul && Opc <= Rem; } 785 bool isAdditiveOp() const { return Opc == Add || Opc == Sub; } 786 bool isShiftOp() const { return Opc == Shl || Opc == Shr; } 787 bool isBitwiseOp() const { return Opc >= And && Opc <= Or; } 788 bool isRelationalOp() const { return Opc >= LT && Opc <= GE; } 789 bool isEqualityOp() const { return Opc == EQ || Opc == NE; } 790 bool isLogicalOp() const { return Opc == LAnd || Opc == LOr; } 791 bool isAssignmentOp() const { return Opc >= Assign && Opc <= OrAssign; } 792 bool isCompoundAssignmentOp() const { return Opc > Assign && Opc <= OrAssign;} 793 bool isShiftAssignOp() const { return Opc == ShlAssign || Opc == ShrAssign; } 794 795 static bool classof(const Stmt *S) { 796 return S->getStmtClass() == BinaryOperatorClass || 797 S->getStmtClass() == CompoundAssignOperatorClass; 798 } 799 static bool classof(const BinaryOperator *) { return true; } 800 801 // Iterators 802 virtual child_iterator child_begin(); 803 virtual child_iterator child_end(); 804 805 virtual void directEmit(llvm::Serializer& S) const; 806 static BinaryOperator* directMaterialize(llvm::Deserializer& D); 807 808protected: 809 BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, 810 SourceLocation oploc, bool dead) 811 : Expr(CompoundAssignOperatorClass, ResTy), Opc(opc), OpLoc(oploc) { 812 SubExprs[LHS] = lhs; 813 SubExprs[RHS] = rhs; 814 } 815}; 816 817/// CompoundAssignOperator - For compound assignments (e.g. +=), we keep 818/// track of the type the operation is performed in. Due to the semantics of 819/// these operators, the operands are promoted, the aritmetic performed, an 820/// implicit conversion back to the result type done, then the assignment takes 821/// place. This captures the intermediate type which the computation is done 822/// in. 823class CompoundAssignOperator : public BinaryOperator { 824 QualType ComputationType; 825public: 826 CompoundAssignOperator(Expr *lhs, Expr *rhs, Opcode opc, 827 QualType ResType, QualType CompType, 828 SourceLocation OpLoc) 829 : BinaryOperator(lhs, rhs, opc, ResType, OpLoc, true), 830 ComputationType(CompType) { 831 assert(isCompoundAssignmentOp() && 832 "Only should be used for compound assignments"); 833 } 834 835 QualType getComputationType() const { return ComputationType; } 836 837 static bool classof(const CompoundAssignOperator *) { return true; } 838 static bool classof(const Stmt *S) { 839 return S->getStmtClass() == CompoundAssignOperatorClass; 840 } 841}; 842 843/// ConditionalOperator - The ?: operator. Note that LHS may be null when the 844/// GNU "missing LHS" extension is in use. 845/// 846class ConditionalOperator : public Expr { 847 enum { COND, LHS, RHS, END_EXPR }; 848 Expr* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. 849public: 850 ConditionalOperator(Expr *cond, Expr *lhs, Expr *rhs, QualType t) 851 : Expr(ConditionalOperatorClass, t) { 852 SubExprs[COND] = cond; 853 SubExprs[LHS] = lhs; 854 SubExprs[RHS] = rhs; 855 } 856 857 Expr *getCond() const { return SubExprs[COND]; } 858 Expr *getLHS() const { return SubExprs[LHS]; } 859 Expr *getRHS() const { return SubExprs[RHS]; } 860 861 virtual SourceRange getSourceRange() const { 862 return SourceRange(getCond()->getLocStart(), getRHS()->getLocEnd()); 863 } 864 static bool classof(const Stmt *T) { 865 return T->getStmtClass() == ConditionalOperatorClass; 866 } 867 static bool classof(const ConditionalOperator *) { return true; } 868 869 // Iterators 870 virtual child_iterator child_begin(); 871 virtual child_iterator child_end(); 872}; 873 874/// AddrLabelExpr - The GNU address of label extension, representing &&label. 875class AddrLabelExpr : public Expr { 876 SourceLocation AmpAmpLoc, LabelLoc; 877 LabelStmt *Label; 878public: 879 AddrLabelExpr(SourceLocation AALoc, SourceLocation LLoc, LabelStmt *L, 880 QualType t) 881 : Expr(AddrLabelExprClass, t), AmpAmpLoc(AALoc), LabelLoc(LLoc), Label(L) {} 882 883 virtual SourceRange getSourceRange() const { 884 return SourceRange(AmpAmpLoc, LabelLoc); 885 } 886 887 LabelStmt *getLabel() const { return Label; } 888 889 static bool classof(const Stmt *T) { 890 return T->getStmtClass() == AddrLabelExprClass; 891 } 892 static bool classof(const AddrLabelExpr *) { return true; } 893 894 // Iterators 895 virtual child_iterator child_begin(); 896 virtual child_iterator child_end(); 897}; 898 899/// StmtExpr - This is the GNU Statement Expression extension: ({int X=4; X;}). 900/// The StmtExpr contains a single CompoundStmt node, which it evaluates and 901/// takes the value of the last subexpression. 902class StmtExpr : public Expr { 903 CompoundStmt *SubStmt; 904 SourceLocation LParenLoc, RParenLoc; 905public: 906 StmtExpr(CompoundStmt *substmt, QualType T, 907 SourceLocation lp, SourceLocation rp) : 908 Expr(StmtExprClass, T), SubStmt(substmt), LParenLoc(lp), RParenLoc(rp) { } 909 910 CompoundStmt *getSubStmt() { return SubStmt; } 911 const CompoundStmt *getSubStmt() const { return SubStmt; } 912 913 virtual SourceRange getSourceRange() const { 914 return SourceRange(LParenLoc, RParenLoc); 915 } 916 917 static bool classof(const Stmt *T) { 918 return T->getStmtClass() == StmtExprClass; 919 } 920 static bool classof(const StmtExpr *) { return true; } 921 922 // Iterators 923 virtual child_iterator child_begin(); 924 virtual child_iterator child_end(); 925}; 926 927/// TypesCompatibleExpr - GNU builtin-in function __builtin_type_compatible_p. 928/// This AST node represents a function that returns 1 if two *types* (not 929/// expressions) are compatible. The result of this built-in function can be 930/// used in integer constant expressions. 931class TypesCompatibleExpr : public Expr { 932 QualType Type1; 933 QualType Type2; 934 SourceLocation BuiltinLoc, RParenLoc; 935public: 936 TypesCompatibleExpr(QualType ReturnType, SourceLocation BLoc, 937 QualType t1, QualType t2, SourceLocation RP) : 938 Expr(TypesCompatibleExprClass, ReturnType), Type1(t1), Type2(t2), 939 BuiltinLoc(BLoc), RParenLoc(RP) {} 940 941 QualType getArgType1() const { return Type1; } 942 QualType getArgType2() const { return Type2; } 943 944 virtual SourceRange getSourceRange() const { 945 return SourceRange(BuiltinLoc, RParenLoc); 946 } 947 static bool classof(const Stmt *T) { 948 return T->getStmtClass() == TypesCompatibleExprClass; 949 } 950 static bool classof(const TypesCompatibleExpr *) { return true; } 951 952 // Iterators 953 virtual child_iterator child_begin(); 954 virtual child_iterator child_end(); 955}; 956 957/// ChooseExpr - GNU builtin-in function __builtin_choose_expr. 958/// This AST node is similar to the conditional operator (?:) in C, with 959/// the following exceptions: 960/// - the test expression much be a constant expression. 961/// - the expression returned has it's type unaltered by promotion rules. 962/// - does not evaluate the expression that was not chosen. 963class ChooseExpr : public Expr { 964 enum { COND, LHS, RHS, END_EXPR }; 965 Expr* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. 966 SourceLocation BuiltinLoc, RParenLoc; 967public: 968 ChooseExpr(SourceLocation BLoc, Expr *cond, Expr *lhs, Expr *rhs, QualType t, 969 SourceLocation RP) 970 : Expr(ChooseExprClass, t), 971 BuiltinLoc(BLoc), RParenLoc(RP) { 972 SubExprs[COND] = cond; 973 SubExprs[LHS] = lhs; 974 SubExprs[RHS] = rhs; 975 } 976 977 /// isConditionTrue - Return true if the condition is true. This is always 978 /// statically knowable for a well-formed choosexpr. 979 bool isConditionTrue(ASTContext &C) const; 980 981 Expr *getCond() const { return SubExprs[COND]; } 982 Expr *getLHS() const { return SubExprs[LHS]; } 983 Expr *getRHS() const { return SubExprs[RHS]; } 984 985 virtual SourceRange getSourceRange() const { 986 return SourceRange(BuiltinLoc, RParenLoc); 987 } 988 static bool classof(const Stmt *T) { 989 return T->getStmtClass() == ChooseExprClass; 990 } 991 static bool classof(const ChooseExpr *) { return true; } 992 993 // Iterators 994 virtual child_iterator child_begin(); 995 virtual child_iterator child_end(); 996}; 997 998/// VAArgExpr, used for the builtin function __builtin_va_start. 999class VAArgExpr : public Expr { 1000 Expr *Val; 1001 SourceLocation BuiltinLoc, RParenLoc; 1002public: 1003 VAArgExpr(SourceLocation BLoc, Expr* e, QualType t, SourceLocation RPLoc) 1004 : Expr(VAArgExprClass, t), 1005 Val(e), 1006 BuiltinLoc(BLoc), 1007 RParenLoc(RPLoc) { } 1008 1009 const Expr *getSubExpr() const { return Val; } 1010 Expr *getSubExpr() { return Val; } 1011 virtual SourceRange getSourceRange() const { 1012 return SourceRange(BuiltinLoc, RParenLoc); 1013 } 1014 static bool classof(const Stmt *T) { 1015 return T->getStmtClass() == VAArgExprClass; 1016 } 1017 static bool classof(const VAArgExpr *) { return true; } 1018 1019 // Iterators 1020 virtual child_iterator child_begin(); 1021 virtual child_iterator child_end(); 1022}; 1023 1024/// InitListExpr, used for struct and array initializers. 1025class InitListExpr : public Expr { 1026 Expr **InitExprs; 1027 unsigned NumInits; 1028 SourceLocation LBraceLoc, RBraceLoc; 1029public: 1030 InitListExpr(SourceLocation lbraceloc, Expr **initexprs, unsigned numinits, 1031 SourceLocation rbraceloc); 1032 ~InitListExpr() { 1033 delete [] InitExprs; 1034 } 1035 1036 unsigned getNumInits() const { return NumInits; } 1037 1038 const Expr* getInit(unsigned Init) const { 1039 assert(Init < NumInits && "Initializer access out of range!"); 1040 return InitExprs[Init]; 1041 } 1042 1043 Expr* getInit(unsigned Init) { 1044 assert(Init < NumInits && "Initializer access out of range!"); 1045 return InitExprs[Init]; 1046 } 1047 1048 void setInit(unsigned Init, Expr *expr) { 1049 assert(Init < NumInits && "Initializer access out of range!"); 1050 InitExprs[Init] = expr; 1051 } 1052 1053 virtual SourceRange getSourceRange() const { 1054 return SourceRange(LBraceLoc, RBraceLoc); 1055 } 1056 static bool classof(const Stmt *T) { 1057 return T->getStmtClass() == InitListExprClass; 1058 } 1059 static bool classof(const InitListExpr *) { return true; } 1060 1061 // Iterators 1062 virtual child_iterator child_begin(); 1063 virtual child_iterator child_end(); 1064}; 1065 1066/// ObjCStringLiteral, used for Objective-C string literals 1067/// i.e. @"foo". 1068class ObjCStringLiteral : public Expr { 1069 StringLiteral *String; 1070 SourceLocation AtLoc; 1071public: 1072 ObjCStringLiteral(StringLiteral *SL, QualType T, SourceLocation L) 1073 : Expr(ObjCStringLiteralClass, T), String(SL), AtLoc(L) {} 1074 1075 StringLiteral* getString() { return String; } 1076 1077 const StringLiteral* getString() const { return String; } 1078 1079 virtual SourceRange getSourceRange() const { 1080 return SourceRange(AtLoc, String->getLocEnd()); 1081 } 1082 1083 static bool classof(const Stmt *T) { 1084 return T->getStmtClass() == ObjCStringLiteralClass; 1085 } 1086 static bool classof(const ObjCStringLiteral *) { return true; } 1087 1088 // Iterators 1089 virtual child_iterator child_begin(); 1090 virtual child_iterator child_end(); 1091}; 1092 1093/// ObjCEncodeExpr, used for @encode in Objective-C. 1094class ObjCEncodeExpr : public Expr { 1095 QualType EncType; 1096 SourceLocation AtLoc, RParenLoc; 1097public: 1098 ObjCEncodeExpr(QualType T, QualType ET, 1099 SourceLocation at, SourceLocation rp) 1100 : Expr(ObjCEncodeExprClass, T), EncType(ET), AtLoc(at), RParenLoc(rp) {} 1101 1102 SourceLocation getAtLoc() const { return AtLoc; } 1103 SourceLocation getRParenLoc() const { return RParenLoc; } 1104 1105 SourceRange getSourceRange() const { return SourceRange(AtLoc, RParenLoc); } 1106 1107 QualType getEncodedType() const { return EncType; } 1108 1109 static bool classof(const Stmt *T) { 1110 return T->getStmtClass() == ObjCEncodeExprClass; 1111 } 1112 static bool classof(const ObjCEncodeExpr *) { return true; } 1113 1114 // Iterators 1115 virtual child_iterator child_begin(); 1116 virtual child_iterator child_end(); 1117}; 1118 1119/// ObjCSelectorExpr used for @selector in Objective-C. 1120class ObjCSelectorExpr : public Expr { 1121 1122 Selector SelName; 1123 1124 SourceLocation AtLoc, RParenLoc; 1125public: 1126 ObjCSelectorExpr(QualType T, Selector selInfo, 1127 SourceLocation at, SourceLocation rp) 1128 : Expr(ObjCSelectorExprClass, T), SelName(selInfo), 1129 AtLoc(at), RParenLoc(rp) {} 1130 1131 const Selector &getSelector() const { return SelName; } 1132 Selector &getSelector() { return SelName; } 1133 1134 SourceLocation getAtLoc() const { return AtLoc; } 1135 SourceLocation getRParenLoc() const { return RParenLoc; } 1136 SourceRange getSourceRange() const { return SourceRange(AtLoc, RParenLoc); } 1137 1138 /// getNumArgs - Return the number of actual arguments to this call. 1139 unsigned getNumArgs() const { return SelName.getNumArgs(); } 1140 1141 static bool classof(const Stmt *T) { 1142 return T->getStmtClass() == ObjCSelectorExprClass; 1143 } 1144 static bool classof(const ObjCSelectorExpr *) { return true; } 1145 1146 // Iterators 1147 virtual child_iterator child_begin(); 1148 virtual child_iterator child_end(); 1149 1150}; 1151 1152/// ObjCProtocolExpr used for protocol in Objective-C. 1153class ObjCProtocolExpr : public Expr { 1154 1155 ObjcProtocolDecl *Protocol; 1156 1157 SourceLocation AtLoc, RParenLoc; 1158 public: 1159 ObjCProtocolExpr(QualType T, ObjcProtocolDecl *protocol, 1160 SourceLocation at, SourceLocation rp) 1161 : Expr(ObjCProtocolExprClass, T), Protocol(protocol), 1162 AtLoc(at), RParenLoc(rp) {} 1163 1164 ObjcProtocolDecl *getProtocol() const { return Protocol; } 1165 1166 SourceLocation getAtLoc() const { return AtLoc; } 1167 SourceLocation getRParenLoc() const { return RParenLoc; } 1168 SourceRange getSourceRange() const { return SourceRange(AtLoc, RParenLoc); } 1169 1170 static bool classof(const Stmt *T) { 1171 return T->getStmtClass() == ObjCProtocolExprClass; 1172 } 1173 static bool classof(const ObjCProtocolExpr *) { return true; } 1174 1175 // Iterators 1176 virtual child_iterator child_begin(); 1177 virtual child_iterator child_end(); 1178 1179}; 1180 1181class ObjCMessageExpr : public Expr { 1182 enum { RECEIVER=0, ARGS_START=1 }; 1183 1184 Expr **SubExprs; 1185 1186 // A unigue name for this message. 1187 Selector SelName; 1188 1189 // A method prototype for this message (optional). 1190 // FIXME: Since method decls contain the selector, and most messages have a 1191 // prototype, consider devising a scheme for unifying SelName/MethodProto. 1192 ObjcMethodDecl *MethodProto; 1193 1194 IdentifierInfo *ClassName; // optional - 0 for instance messages. 1195 1196 SourceLocation LBracloc, RBracloc; 1197public: 1198 // constructor for class messages. 1199 // FIXME: clsName should be typed to ObjCInterfaceType 1200 ObjCMessageExpr(IdentifierInfo *clsName, Selector selInfo, 1201 QualType retType, ObjcMethodDecl *methDecl, 1202 SourceLocation LBrac, SourceLocation RBrac, 1203 Expr **ArgExprs); 1204 // constructor for instance messages. 1205 ObjCMessageExpr(Expr *receiver, Selector selInfo, 1206 QualType retType, ObjcMethodDecl *methDecl, 1207 SourceLocation LBrac, SourceLocation RBrac, 1208 Expr **ArgExprs); 1209 ~ObjCMessageExpr() { 1210 delete [] SubExprs; 1211 } 1212 1213 const Expr *getReceiver() const { return SubExprs[RECEIVER]; } 1214 Expr *getReceiver() { return SubExprs[RECEIVER]; } 1215 1216 const Selector &getSelector() const { return SelName; } 1217 Selector &getSelector() { return SelName; } 1218 1219 const ObjcMethodDecl *getMethodDecl() const { return MethodProto; } 1220 ObjcMethodDecl *getMethodDecl() { return MethodProto; } 1221 1222 const IdentifierInfo *getClassName() const { return ClassName; } 1223 IdentifierInfo *getClassName() { return ClassName; } 1224 1225 /// getNumArgs - Return the number of actual arguments to this call. 1226 unsigned getNumArgs() const { return SelName.getNumArgs(); } 1227 1228/// getArg - Return the specified argument. 1229 Expr *getArg(unsigned Arg) { 1230 assert(Arg < SelName.getNumArgs() && "Arg access out of range!"); 1231 return SubExprs[Arg+ARGS_START]; 1232 } 1233 const Expr *getArg(unsigned Arg) const { 1234 assert(Arg < SelName.getNumArgs() && "Arg access out of range!"); 1235 return SubExprs[Arg+ARGS_START]; 1236 } 1237 /// setArg - Set the specified argument. 1238 void setArg(unsigned Arg, Expr *ArgExpr) { 1239 assert(Arg < SelName.getNumArgs() && "Arg access out of range!"); 1240 SubExprs[Arg+ARGS_START] = ArgExpr; 1241 } 1242 SourceRange getSourceRange() const { return SourceRange(LBracloc, RBracloc); } 1243 1244 static bool classof(const Stmt *T) { 1245 return T->getStmtClass() == ObjCMessageExprClass; 1246 } 1247 static bool classof(const ObjCMessageExpr *) { return true; } 1248 1249 // Iterators 1250 virtual child_iterator child_begin(); 1251 virtual child_iterator child_end(); 1252}; 1253 1254} // end namespace clang 1255 1256#endif 1257