Expr.h revision d7fe4ea296646f049e4ff4cc37aa92ff4014a6b3
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 virtual void directEmit(llvm::Serializer& S) const; 180 static PreDefinedExpr* directMaterialize(llvm::Deserializer& D); 181}; 182 183class IntegerLiteral : public Expr { 184 llvm::APInt Value; 185 SourceLocation Loc; 186public: 187 // type should be IntTy, LongTy, LongLongTy, UnsignedIntTy, UnsignedLongTy, 188 // or UnsignedLongLongTy 189 IntegerLiteral(const llvm::APInt &V, QualType type, SourceLocation l) 190 : Expr(IntegerLiteralClass, type), Value(V), Loc(l) { 191 assert(type->isIntegerType() && "Illegal type in IntegerLiteral"); 192 } 193 const llvm::APInt &getValue() const { return Value; } 194 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 195 196 static bool classof(const Stmt *T) { 197 return T->getStmtClass() == IntegerLiteralClass; 198 } 199 static bool classof(const IntegerLiteral *) { return true; } 200 201 // Iterators 202 virtual child_iterator child_begin(); 203 virtual child_iterator child_end(); 204 205 virtual void directEmit(llvm::Serializer& S) const; 206 static IntegerLiteral* directMaterialize(llvm::Deserializer& D); 207}; 208 209class CharacterLiteral : public Expr { 210 unsigned Value; 211 SourceLocation Loc; 212public: 213 // type should be IntTy 214 CharacterLiteral(unsigned value, QualType type, SourceLocation l) 215 : Expr(CharacterLiteralClass, type), Value(value), Loc(l) { 216 } 217 SourceLocation getLoc() const { return Loc; } 218 219 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 220 221 unsigned getValue() const { return Value; } 222 223 static bool classof(const Stmt *T) { 224 return T->getStmtClass() == CharacterLiteralClass; 225 } 226 static bool classof(const CharacterLiteral *) { return true; } 227 228 // Iterators 229 virtual child_iterator child_begin(); 230 virtual child_iterator child_end(); 231 232 virtual void directEmit(llvm::Serializer& S) const; 233 static CharacterLiteral* directMaterialize(llvm::Deserializer& D); 234}; 235 236class FloatingLiteral : public Expr { 237 llvm::APFloat Value; 238 SourceLocation Loc; 239public: 240 FloatingLiteral(const llvm::APFloat &V, QualType Type, SourceLocation L) 241 : Expr(FloatingLiteralClass, Type), Value(V), Loc(L) {} 242 243 const llvm::APFloat &getValue() const { return Value; } 244 245 /// getValueAsDouble - This returns the value as an inaccurate double. Note 246 /// that this may cause loss of precision, but is useful for debugging dumps 247 /// etc. 248 double getValueAsDouble() const { 249 // FIXME: We need something for long double here. 250 if (cast<BuiltinType>(getType())->getKind() == BuiltinType::Float) 251 return Value.convertToFloat(); 252 else 253 return Value.convertToDouble(); 254 } 255 256 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 257 258 static bool classof(const Stmt *T) { 259 return T->getStmtClass() == FloatingLiteralClass; 260 } 261 static bool classof(const FloatingLiteral *) { return true; } 262 263 // Iterators 264 virtual child_iterator child_begin(); 265 virtual child_iterator child_end(); 266 267 virtual void directEmit(llvm::Serializer& S) const; 268 static FloatingLiteral* directMaterialize(llvm::Deserializer& D); 269}; 270 271/// ImaginaryLiteral - We support imaginary integer and floating point literals, 272/// like "1.0i". We represent these as a wrapper around FloatingLiteral and 273/// IntegerLiteral classes. Instances of this class always have a Complex type 274/// whose element type matches the subexpression. 275/// 276class ImaginaryLiteral : public Expr { 277 Expr *Val; 278public: 279 ImaginaryLiteral(Expr *val, QualType Ty) 280 : Expr(ImaginaryLiteralClass, Ty), Val(val) {} 281 282 const Expr *getSubExpr() const { return Val; } 283 Expr *getSubExpr() { return Val; } 284 285 virtual SourceRange getSourceRange() const { return Val->getSourceRange(); } 286 static bool classof(const Stmt *T) { 287 return T->getStmtClass() == ImaginaryLiteralClass; 288 } 289 static bool classof(const ImaginaryLiteral *) { return true; } 290 291 // Iterators 292 virtual child_iterator child_begin(); 293 virtual child_iterator child_end(); 294 295 virtual void directEmit(llvm::Serializer& S) const; 296 static ImaginaryLiteral* directMaterialize(llvm::Deserializer& D); 297}; 298 299/// StringLiteral - This represents a string literal expression, e.g. "foo" 300/// or L"bar" (wide strings). The actual string is returned by getStrData() 301/// is NOT null-terminated, and the length of the string is determined by 302/// calling getByteLength(). 303class StringLiteral : public Expr { 304 const char *StrData; 305 unsigned ByteLength; 306 bool IsWide; 307 // if the StringLiteral was composed using token pasting, both locations 308 // are needed. If not (the common case), firstTokLoc == lastTokLoc. 309 // FIXME: if space becomes an issue, we should create a sub-class. 310 SourceLocation firstTokLoc, lastTokLoc; 311public: 312 StringLiteral(const char *strData, unsigned byteLength, bool Wide, 313 QualType t, SourceLocation b, SourceLocation e); 314 virtual ~StringLiteral(); 315 316 const char *getStrData() const { return StrData; } 317 unsigned getByteLength() const { return ByteLength; } 318 bool isWide() const { return IsWide; } 319 320 virtual SourceRange getSourceRange() const { 321 return SourceRange(firstTokLoc,lastTokLoc); 322 } 323 static bool classof(const Stmt *T) { 324 return T->getStmtClass() == StringLiteralClass; 325 } 326 static bool classof(const StringLiteral *) { return true; } 327 328 // Iterators 329 virtual child_iterator child_begin(); 330 virtual child_iterator child_end(); 331 332 virtual void directEmit(llvm::Serializer& S) const; 333 static StringLiteral* directMaterialize(llvm::Deserializer& D); 334}; 335 336/// ParenExpr - This represents a parethesized expression, e.g. "(1)". This 337/// AST node is only formed if full location information is requested. 338class ParenExpr : public Expr { 339 SourceLocation L, R; 340 Expr *Val; 341public: 342 ParenExpr(SourceLocation l, SourceLocation r, Expr *val) 343 : Expr(ParenExprClass, val->getType()), L(l), R(r), Val(val) {} 344 345 const Expr *getSubExpr() const { return Val; } 346 Expr *getSubExpr() { return Val; } 347 SourceRange getSourceRange() const { return SourceRange(L, R); } 348 349 static bool classof(const Stmt *T) { 350 return T->getStmtClass() == ParenExprClass; 351 } 352 static bool classof(const ParenExpr *) { return true; } 353 354 // Iterators 355 virtual child_iterator child_begin(); 356 virtual child_iterator child_end(); 357 358 virtual void directEmit(llvm::Serializer& S) const; 359 static ParenExpr* directMaterialize(llvm::Deserializer& D); 360}; 361 362 363/// UnaryOperator - This represents the unary-expression's (except sizeof of 364/// types), the postinc/postdec operators from postfix-expression, and various 365/// extensions. 366/// 367/// Notes on various nodes: 368/// 369/// Real/Imag - These return the real/imag part of a complex operand. If 370/// applied to a non-complex value, the former returns its operand and the 371/// later returns zero in the type of the operand. 372/// 373/// __builtin_offsetof(type, a.b[10]) is represented as a unary operator whose 374/// subexpression is a compound literal with the various MemberExpr and 375/// ArraySubscriptExpr's applied to it. 376/// 377class UnaryOperator : public Expr { 378public: 379 // Note that additions to this should also update the StmtVisitor class. 380 enum Opcode { 381 PostInc, PostDec, // [C99 6.5.2.4] Postfix increment and decrement operators 382 PreInc, PreDec, // [C99 6.5.3.1] Prefix increment and decrement operators. 383 AddrOf, Deref, // [C99 6.5.3.2] Address and indirection operators. 384 Plus, Minus, // [C99 6.5.3.3] Unary arithmetic operators. 385 Not, LNot, // [C99 6.5.3.3] Unary arithmetic operators. 386 SizeOf, AlignOf, // [C99 6.5.3.4] Sizeof (expr, not type) operator. 387 Real, Imag, // "__real expr"/"__imag expr" Extension. 388 Extension, // __extension__ marker. 389 OffsetOf // __builtin_offsetof 390 }; 391private: 392 Expr *Val; 393 Opcode Opc; 394 SourceLocation Loc; 395public: 396 397 UnaryOperator(Expr *input, Opcode opc, QualType type, SourceLocation l) 398 : Expr(UnaryOperatorClass, type), Val(input), Opc(opc), Loc(l) {} 399 400 Opcode getOpcode() const { return Opc; } 401 Expr *getSubExpr() const { return Val; } 402 403 /// getOperatorLoc - Return the location of the operator. 404 SourceLocation getOperatorLoc() const { return Loc; } 405 406 /// isPostfix - Return true if this is a postfix operation, like x++. 407 static bool isPostfix(Opcode Op); 408 409 bool isPostfix() const { return isPostfix(Opc); } 410 bool isIncrementDecrementOp() const { return Opc>=PostInc && Opc<=PreDec; } 411 bool isSizeOfAlignOfOp() const { return Opc == SizeOf || Opc == AlignOf; } 412 static bool isArithmeticOp(Opcode Op) { return Op >= Plus && Op <= LNot; } 413 414 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 415 /// corresponds to, e.g. "sizeof" or "[pre]++" 416 static const char *getOpcodeStr(Opcode Op); 417 418 virtual SourceRange getSourceRange() const { 419 if (isPostfix()) 420 return SourceRange(Val->getLocStart(), Loc); 421 else 422 return SourceRange(Loc, Val->getLocEnd()); 423 } 424 virtual SourceLocation getExprLoc() const { return Loc; } 425 426 static bool classof(const Stmt *T) { 427 return T->getStmtClass() == UnaryOperatorClass; 428 } 429 static bool classof(const UnaryOperator *) { return true; } 430 431 // Iterators 432 virtual child_iterator child_begin(); 433 virtual child_iterator child_end(); 434}; 435 436/// SizeOfAlignOfTypeExpr - [C99 6.5.3.4] - This is only for sizeof/alignof of 437/// *types*. sizeof(expr) is handled by UnaryOperator. 438class SizeOfAlignOfTypeExpr : public Expr { 439 bool isSizeof; // true if sizeof, false if alignof. 440 QualType Ty; 441 SourceLocation OpLoc, RParenLoc; 442public: 443 SizeOfAlignOfTypeExpr(bool issizeof, QualType argType, QualType resultType, 444 SourceLocation op, SourceLocation rp) : 445 Expr(SizeOfAlignOfTypeExprClass, resultType), 446 isSizeof(issizeof), Ty(argType), OpLoc(op), RParenLoc(rp) {} 447 448 bool isSizeOf() const { return isSizeof; } 449 QualType getArgumentType() const { return Ty; } 450 451 SourceLocation getOperatorLoc() const { return OpLoc; } 452 SourceRange getSourceRange() const { return SourceRange(OpLoc, RParenLoc); } 453 454 static bool classof(const Stmt *T) { 455 return T->getStmtClass() == SizeOfAlignOfTypeExprClass; 456 } 457 static bool classof(const SizeOfAlignOfTypeExpr *) { return true; } 458 459 // Iterators 460 virtual child_iterator child_begin(); 461 virtual child_iterator child_end(); 462}; 463 464//===----------------------------------------------------------------------===// 465// Postfix Operators. 466//===----------------------------------------------------------------------===// 467 468/// ArraySubscriptExpr - [C99 6.5.2.1] Array Subscripting. 469class ArraySubscriptExpr : public Expr { 470 enum { LHS, RHS, END_EXPR=2 }; 471 Expr* SubExprs[END_EXPR]; 472 SourceLocation RBracketLoc; 473public: 474 ArraySubscriptExpr(Expr *lhs, Expr *rhs, QualType t, 475 SourceLocation rbracketloc) 476 : Expr(ArraySubscriptExprClass, t), RBracketLoc(rbracketloc) { 477 SubExprs[LHS] = lhs; 478 SubExprs[RHS] = rhs; 479 } 480 481 /// An array access can be written A[4] or 4[A] (both are equivalent). 482 /// - getBase() and getIdx() always present the normalized view: A[4]. 483 /// In this case getBase() returns "A" and getIdx() returns "4". 484 /// - getLHS() and getRHS() present the syntactic view. e.g. for 485 /// 4[A] getLHS() returns "4". 486 487 Expr *getLHS() { return SubExprs[LHS]; } 488 const Expr *getLHS() const { return SubExprs[LHS]; } 489 490 Expr *getRHS() { return SubExprs[RHS]; } 491 const Expr *getRHS() const { return SubExprs[RHS]; } 492 493 Expr *getBase() { 494 return (getLHS()->getType()->isIntegerType()) ? getRHS() : getLHS(); 495 } 496 497 const Expr *getBase() const { 498 return (getLHS()->getType()->isIntegerType()) ? getRHS() : getLHS(); 499 } 500 501 Expr *getIdx() { 502 return (getLHS()->getType()->isIntegerType()) ? getLHS() : getRHS(); 503 } 504 505 const Expr *getIdx() const { 506 return (getLHS()->getType()->isIntegerType()) ? getLHS() : getRHS(); 507 } 508 509 510 SourceRange getSourceRange() const { 511 return SourceRange(getLHS()->getLocStart(), RBracketLoc); 512 } 513 virtual SourceLocation getExprLoc() const { return RBracketLoc; } 514 515 static bool classof(const Stmt *T) { 516 return T->getStmtClass() == ArraySubscriptExprClass; 517 } 518 static bool classof(const ArraySubscriptExpr *) { return true; } 519 520 // Iterators 521 virtual child_iterator child_begin(); 522 virtual child_iterator child_end(); 523 524 virtual void directEmit(llvm::Serializer& S) const; 525 static ArraySubscriptExpr* directMaterialize(llvm::Deserializer& D); 526}; 527 528 529/// CallExpr - [C99 6.5.2.2] Function Calls. 530/// 531class CallExpr : public Expr { 532 enum { FN=0, ARGS_START=1 }; 533 Expr **SubExprs; 534 unsigned NumArgs; 535 SourceLocation RParenLoc; 536 537 // This version of the ctor is for deserialization. 538 CallExpr(Expr** subexprs, unsigned numargs, QualType t, 539 SourceLocation rparenloc) 540 : Expr(CallExprClass,t), SubExprs(subexprs), 541 NumArgs(numargs), RParenLoc(rparenloc) {} 542 543public: 544 CallExpr(Expr *fn, Expr **args, unsigned numargs, QualType t, 545 SourceLocation rparenloc); 546 ~CallExpr() { 547 delete [] SubExprs; 548 } 549 550 const Expr *getCallee() const { return SubExprs[FN]; } 551 Expr *getCallee() { return SubExprs[FN]; } 552 553 /// getNumArgs - Return the number of actual arguments to this call. 554 /// 555 unsigned getNumArgs() const { return NumArgs; } 556 557 /// getArg - Return the specified argument. 558 Expr *getArg(unsigned Arg) { 559 assert(Arg < NumArgs && "Arg access out of range!"); 560 return SubExprs[Arg+ARGS_START]; 561 } 562 const Expr *getArg(unsigned Arg) const { 563 assert(Arg < NumArgs && "Arg access out of range!"); 564 return SubExprs[Arg+ARGS_START]; 565 } 566 /// setArg - Set the specified argument. 567 void setArg(unsigned Arg, Expr *ArgExpr) { 568 assert(Arg < NumArgs && "Arg access out of range!"); 569 SubExprs[Arg+ARGS_START] = ArgExpr; 570 } 571 /// getNumCommas - Return the number of commas that must have been present in 572 /// this function call. 573 unsigned getNumCommas() const { return NumArgs ? NumArgs - 1 : 0; } 574 575 bool isBuiltinClassifyType(llvm::APSInt &Result) const; 576 577 SourceRange getSourceRange() const { 578 return SourceRange(getCallee()->getLocStart(), RParenLoc); 579 } 580 581 static bool classof(const Stmt *T) { 582 return T->getStmtClass() == CallExprClass; 583 } 584 static bool classof(const CallExpr *) { return true; } 585 586 // Iterators 587 virtual child_iterator child_begin(); 588 virtual child_iterator child_end(); 589 590 virtual void directEmit(llvm::Serializer& S) const; 591 static CallExpr* directMaterialize(llvm::Deserializer& D); 592}; 593 594/// MemberExpr - [C99 6.5.2.3] Structure and Union Members. 595/// 596class MemberExpr : public Expr { 597 Expr *Base; 598 FieldDecl *MemberDecl; 599 SourceLocation MemberLoc; 600 bool IsArrow; // True if this is "X->F", false if this is "X.F". 601public: 602 MemberExpr(Expr *base, bool isarrow, FieldDecl *memberdecl, SourceLocation l) 603 : Expr(MemberExprClass, memberdecl->getType()), 604 Base(base), MemberDecl(memberdecl), MemberLoc(l), IsArrow(isarrow) {} 605 606 Expr *getBase() const { return Base; } 607 FieldDecl *getMemberDecl() const { return MemberDecl; } 608 bool isArrow() const { return IsArrow; } 609 610 virtual SourceRange getSourceRange() const { 611 return SourceRange(getBase()->getLocStart(), MemberLoc); 612 } 613 virtual SourceLocation getExprLoc() const { return MemberLoc; } 614 615 static bool classof(const Stmt *T) { 616 return T->getStmtClass() == MemberExprClass; 617 } 618 static bool classof(const MemberExpr *) { return true; } 619 620 // Iterators 621 virtual child_iterator child_begin(); 622 virtual child_iterator child_end(); 623}; 624 625/// OCUVectorElementExpr - This represents access to specific elements of a 626/// vector, and may occur on the left hand side or right hand side. For example 627/// the following is legal: "V.xy = V.zw" if V is a 4 element ocu vector. 628/// 629class OCUVectorElementExpr : public Expr { 630 Expr *Base; 631 IdentifierInfo &Accessor; 632 SourceLocation AccessorLoc; 633public: 634 enum ElementType { 635 Point, // xywz 636 Color, // rgba 637 Texture // stpq 638 }; 639 OCUVectorElementExpr(QualType ty, Expr *base, IdentifierInfo &accessor, 640 SourceLocation loc) 641 : Expr(OCUVectorElementExprClass, ty), 642 Base(base), Accessor(accessor), AccessorLoc(loc) {} 643 644 const Expr *getBase() const { return Base; } 645 Expr *getBase() { return Base; } 646 647 IdentifierInfo &getAccessor() const { return Accessor; } 648 649 /// getNumElements - Get the number of components being selected. 650 unsigned getNumElements() const; 651 652 /// getElementType - Determine whether the components of this access are 653 /// "point" "color" or "texture" elements. 654 ElementType getElementType() const; 655 656 /// containsDuplicateElements - Return true if any element access is 657 /// repeated. 658 bool containsDuplicateElements() const; 659 660 /// getEncodedElementAccess - Encode the elements accessed into a bit vector. 661 /// The encoding currently uses 2-bit bitfields, but clients should use the 662 /// accessors below to access them. 663 /// 664 unsigned getEncodedElementAccess() const; 665 666 /// getAccessedFieldNo - Given an encoded value and a result number, return 667 /// the input field number being accessed. 668 static unsigned getAccessedFieldNo(unsigned Idx, unsigned EncodedVal) { 669 return (EncodedVal >> (Idx*2)) & 3; 670 } 671 672 virtual SourceRange getSourceRange() const { 673 return SourceRange(getBase()->getLocStart(), AccessorLoc); 674 } 675 static bool classof(const Stmt *T) { 676 return T->getStmtClass() == OCUVectorElementExprClass; 677 } 678 static bool classof(const OCUVectorElementExpr *) { return true; } 679 680 // Iterators 681 virtual child_iterator child_begin(); 682 virtual child_iterator child_end(); 683}; 684 685/// CompoundLiteralExpr - [C99 6.5.2.5] 686/// 687class CompoundLiteralExpr : public Expr { 688 Expr *Init; 689public: 690 CompoundLiteralExpr(QualType ty, Expr *init) : 691 Expr(CompoundLiteralExprClass, ty), Init(init) {} 692 693 const Expr *getInitializer() const { return Init; } 694 Expr *getInitializer() { return Init; } 695 696 virtual SourceRange getSourceRange() const { 697 if (Init) 698 return Init->getSourceRange(); 699 return SourceRange(); 700 } 701 702 static bool classof(const Stmt *T) { 703 return T->getStmtClass() == CompoundLiteralExprClass; 704 } 705 static bool classof(const CompoundLiteralExpr *) { return true; } 706 707 // Iterators 708 virtual child_iterator child_begin(); 709 virtual child_iterator child_end(); 710}; 711 712/// ImplicitCastExpr - Allows us to explicitly represent implicit type 713/// conversions. For example: converting T[]->T*, void f()->void (*f)(), 714/// float->double, short->int, etc. 715/// 716class ImplicitCastExpr : public Expr { 717 Expr *Op; 718public: 719 ImplicitCastExpr(QualType ty, Expr *op) : 720 Expr(ImplicitCastExprClass, ty), Op(op) {} 721 722 Expr *getSubExpr() { return Op; } 723 const Expr *getSubExpr() const { return Op; } 724 725 virtual SourceRange getSourceRange() const { return Op->getSourceRange(); } 726 727 static bool classof(const Stmt *T) { 728 return T->getStmtClass() == ImplicitCastExprClass; 729 } 730 static bool classof(const ImplicitCastExpr *) { return true; } 731 732 // Iterators 733 virtual child_iterator child_begin(); 734 virtual child_iterator child_end(); 735 736 virtual void directEmit(llvm::Serializer& S) const; 737 static ImplicitCastExpr* directMaterialize(llvm::Deserializer& D); 738}; 739 740/// CastExpr - [C99 6.5.4] Cast Operators. 741/// 742class CastExpr : public Expr { 743 Expr *Op; 744 SourceLocation Loc; // the location of the left paren 745public: 746 CastExpr(QualType ty, Expr *op, SourceLocation l) : 747 Expr(CastExprClass, ty), Op(op), Loc(l) {} 748 749 SourceLocation getLParenLoc() const { return Loc; } 750 751 Expr *getSubExpr() const { return Op; } 752 753 virtual SourceRange getSourceRange() const { 754 return SourceRange(Loc, getSubExpr()->getSourceRange().getEnd()); 755 } 756 static bool classof(const Stmt *T) { 757 return T->getStmtClass() == CastExprClass; 758 } 759 static bool classof(const CastExpr *) { return true; } 760 761 // Iterators 762 virtual child_iterator child_begin(); 763 virtual child_iterator child_end(); 764 765 virtual void directEmit(llvm::Serializer& S) const; 766 static CastExpr* directMaterialize(llvm::Deserializer& D); 767}; 768 769class BinaryOperator : public Expr { 770public: 771 enum Opcode { 772 // Operators listed in order of precedence. 773 // Note that additions to this should also update the StmtVisitor class. 774 Mul, Div, Rem, // [C99 6.5.5] Multiplicative operators. 775 Add, Sub, // [C99 6.5.6] Additive operators. 776 Shl, Shr, // [C99 6.5.7] Bitwise shift operators. 777 LT, GT, LE, GE, // [C99 6.5.8] Relational operators. 778 EQ, NE, // [C99 6.5.9] Equality operators. 779 And, // [C99 6.5.10] Bitwise AND operator. 780 Xor, // [C99 6.5.11] Bitwise XOR operator. 781 Or, // [C99 6.5.12] Bitwise OR operator. 782 LAnd, // [C99 6.5.13] Logical AND operator. 783 LOr, // [C99 6.5.14] Logical OR operator. 784 Assign, MulAssign,// [C99 6.5.16] Assignment operators. 785 DivAssign, RemAssign, 786 AddAssign, SubAssign, 787 ShlAssign, ShrAssign, 788 AndAssign, XorAssign, 789 OrAssign, 790 Comma // [C99 6.5.17] Comma operator. 791 }; 792private: 793 enum { LHS, RHS, END_EXPR }; 794 Expr* SubExprs[END_EXPR]; 795 Opcode Opc; 796 SourceLocation OpLoc; 797public: 798 799 BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, 800 SourceLocation opLoc) 801 : Expr(BinaryOperatorClass, ResTy), Opc(opc), OpLoc(opLoc) { 802 SubExprs[LHS] = lhs; 803 SubExprs[RHS] = rhs; 804 assert(!isCompoundAssignmentOp() && 805 "Use ArithAssignBinaryOperator for compound assignments"); 806 } 807 808 SourceLocation getOperatorLoc() const { return OpLoc; } 809 Opcode getOpcode() const { return Opc; } 810 Expr *getLHS() const { return SubExprs[LHS]; } 811 Expr *getRHS() const { return SubExprs[RHS]; } 812 virtual SourceRange getSourceRange() const { 813 return SourceRange(getLHS()->getLocStart(), getRHS()->getLocEnd()); 814 } 815 816 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 817 /// corresponds to, e.g. "<<=". 818 static const char *getOpcodeStr(Opcode Op); 819 820 /// predicates to categorize the respective opcodes. 821 bool isMultiplicativeOp() const { return Opc >= Mul && Opc <= Rem; } 822 bool isAdditiveOp() const { return Opc == Add || Opc == Sub; } 823 bool isShiftOp() const { return Opc == Shl || Opc == Shr; } 824 bool isBitwiseOp() const { return Opc >= And && Opc <= Or; } 825 bool isRelationalOp() const { return Opc >= LT && Opc <= GE; } 826 bool isEqualityOp() const { return Opc == EQ || Opc == NE; } 827 bool isLogicalOp() const { return Opc == LAnd || Opc == LOr; } 828 bool isAssignmentOp() const { return Opc >= Assign && Opc <= OrAssign; } 829 bool isCompoundAssignmentOp() const { return Opc > Assign && Opc <= OrAssign;} 830 bool isShiftAssignOp() const { return Opc == ShlAssign || Opc == ShrAssign; } 831 832 static bool classof(const Stmt *S) { 833 return S->getStmtClass() == BinaryOperatorClass || 834 S->getStmtClass() == CompoundAssignOperatorClass; 835 } 836 static bool classof(const BinaryOperator *) { return true; } 837 838 // Iterators 839 virtual child_iterator child_begin(); 840 virtual child_iterator child_end(); 841 842 virtual void directEmit(llvm::Serializer& S) const; 843 static BinaryOperator* directMaterialize(llvm::Deserializer& D); 844 845protected: 846 BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, 847 SourceLocation oploc, bool dead) 848 : Expr(CompoundAssignOperatorClass, ResTy), Opc(opc), OpLoc(oploc) { 849 SubExprs[LHS] = lhs; 850 SubExprs[RHS] = rhs; 851 } 852}; 853 854/// CompoundAssignOperator - For compound assignments (e.g. +=), we keep 855/// track of the type the operation is performed in. Due to the semantics of 856/// these operators, the operands are promoted, the aritmetic performed, an 857/// implicit conversion back to the result type done, then the assignment takes 858/// place. This captures the intermediate type which the computation is done 859/// in. 860class CompoundAssignOperator : public BinaryOperator { 861 QualType ComputationType; 862public: 863 CompoundAssignOperator(Expr *lhs, Expr *rhs, Opcode opc, 864 QualType ResType, QualType CompType, 865 SourceLocation OpLoc) 866 : BinaryOperator(lhs, rhs, opc, ResType, OpLoc, true), 867 ComputationType(CompType) { 868 assert(isCompoundAssignmentOp() && 869 "Only should be used for compound assignments"); 870 } 871 872 QualType getComputationType() const { return ComputationType; } 873 874 static bool classof(const CompoundAssignOperator *) { return true; } 875 static bool classof(const Stmt *S) { 876 return S->getStmtClass() == CompoundAssignOperatorClass; 877 } 878}; 879 880/// ConditionalOperator - The ?: operator. Note that LHS may be null when the 881/// GNU "missing LHS" extension is in use. 882/// 883class ConditionalOperator : public Expr { 884 enum { COND, LHS, RHS, END_EXPR }; 885 Expr* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. 886public: 887 ConditionalOperator(Expr *cond, Expr *lhs, Expr *rhs, QualType t) 888 : Expr(ConditionalOperatorClass, t) { 889 SubExprs[COND] = cond; 890 SubExprs[LHS] = lhs; 891 SubExprs[RHS] = rhs; 892 } 893 894 Expr *getCond() const { return SubExprs[COND]; } 895 Expr *getLHS() const { return SubExprs[LHS]; } 896 Expr *getRHS() const { return SubExprs[RHS]; } 897 898 virtual SourceRange getSourceRange() const { 899 return SourceRange(getCond()->getLocStart(), getRHS()->getLocEnd()); 900 } 901 static bool classof(const Stmt *T) { 902 return T->getStmtClass() == ConditionalOperatorClass; 903 } 904 static bool classof(const ConditionalOperator *) { return true; } 905 906 // Iterators 907 virtual child_iterator child_begin(); 908 virtual child_iterator child_end(); 909}; 910 911/// AddrLabelExpr - The GNU address of label extension, representing &&label. 912class AddrLabelExpr : public Expr { 913 SourceLocation AmpAmpLoc, LabelLoc; 914 LabelStmt *Label; 915public: 916 AddrLabelExpr(SourceLocation AALoc, SourceLocation LLoc, LabelStmt *L, 917 QualType t) 918 : Expr(AddrLabelExprClass, t), AmpAmpLoc(AALoc), LabelLoc(LLoc), Label(L) {} 919 920 virtual SourceRange getSourceRange() const { 921 return SourceRange(AmpAmpLoc, LabelLoc); 922 } 923 924 LabelStmt *getLabel() const { return Label; } 925 926 static bool classof(const Stmt *T) { 927 return T->getStmtClass() == AddrLabelExprClass; 928 } 929 static bool classof(const AddrLabelExpr *) { return true; } 930 931 // Iterators 932 virtual child_iterator child_begin(); 933 virtual child_iterator child_end(); 934}; 935 936/// StmtExpr - This is the GNU Statement Expression extension: ({int X=4; X;}). 937/// The StmtExpr contains a single CompoundStmt node, which it evaluates and 938/// takes the value of the last subexpression. 939class StmtExpr : public Expr { 940 CompoundStmt *SubStmt; 941 SourceLocation LParenLoc, RParenLoc; 942public: 943 StmtExpr(CompoundStmt *substmt, QualType T, 944 SourceLocation lp, SourceLocation rp) : 945 Expr(StmtExprClass, T), SubStmt(substmt), LParenLoc(lp), RParenLoc(rp) { } 946 947 CompoundStmt *getSubStmt() { return SubStmt; } 948 const CompoundStmt *getSubStmt() const { return SubStmt; } 949 950 virtual SourceRange getSourceRange() const { 951 return SourceRange(LParenLoc, RParenLoc); 952 } 953 954 static bool classof(const Stmt *T) { 955 return T->getStmtClass() == StmtExprClass; 956 } 957 static bool classof(const StmtExpr *) { return true; } 958 959 // Iterators 960 virtual child_iterator child_begin(); 961 virtual child_iterator child_end(); 962}; 963 964/// TypesCompatibleExpr - GNU builtin-in function __builtin_type_compatible_p. 965/// This AST node represents a function that returns 1 if two *types* (not 966/// expressions) are compatible. The result of this built-in function can be 967/// used in integer constant expressions. 968class TypesCompatibleExpr : public Expr { 969 QualType Type1; 970 QualType Type2; 971 SourceLocation BuiltinLoc, RParenLoc; 972public: 973 TypesCompatibleExpr(QualType ReturnType, SourceLocation BLoc, 974 QualType t1, QualType t2, SourceLocation RP) : 975 Expr(TypesCompatibleExprClass, ReturnType), Type1(t1), Type2(t2), 976 BuiltinLoc(BLoc), RParenLoc(RP) {} 977 978 QualType getArgType1() const { return Type1; } 979 QualType getArgType2() const { return Type2; } 980 981 virtual SourceRange getSourceRange() const { 982 return SourceRange(BuiltinLoc, RParenLoc); 983 } 984 static bool classof(const Stmt *T) { 985 return T->getStmtClass() == TypesCompatibleExprClass; 986 } 987 static bool classof(const TypesCompatibleExpr *) { return true; } 988 989 // Iterators 990 virtual child_iterator child_begin(); 991 virtual child_iterator child_end(); 992}; 993 994/// ChooseExpr - GNU builtin-in function __builtin_choose_expr. 995/// This AST node is similar to the conditional operator (?:) in C, with 996/// the following exceptions: 997/// - the test expression much be a constant expression. 998/// - the expression returned has it's type unaltered by promotion rules. 999/// - does not evaluate the expression that was not chosen. 1000class ChooseExpr : public Expr { 1001 enum { COND, LHS, RHS, END_EXPR }; 1002 Expr* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. 1003 SourceLocation BuiltinLoc, RParenLoc; 1004public: 1005 ChooseExpr(SourceLocation BLoc, Expr *cond, Expr *lhs, Expr *rhs, QualType t, 1006 SourceLocation RP) 1007 : Expr(ChooseExprClass, t), 1008 BuiltinLoc(BLoc), RParenLoc(RP) { 1009 SubExprs[COND] = cond; 1010 SubExprs[LHS] = lhs; 1011 SubExprs[RHS] = rhs; 1012 } 1013 1014 /// isConditionTrue - Return true if the condition is true. This is always 1015 /// statically knowable for a well-formed choosexpr. 1016 bool isConditionTrue(ASTContext &C) const; 1017 1018 Expr *getCond() const { return SubExprs[COND]; } 1019 Expr *getLHS() const { return SubExprs[LHS]; } 1020 Expr *getRHS() const { return SubExprs[RHS]; } 1021 1022 virtual SourceRange getSourceRange() const { 1023 return SourceRange(BuiltinLoc, RParenLoc); 1024 } 1025 static bool classof(const Stmt *T) { 1026 return T->getStmtClass() == ChooseExprClass; 1027 } 1028 static bool classof(const ChooseExpr *) { return true; } 1029 1030 // Iterators 1031 virtual child_iterator child_begin(); 1032 virtual child_iterator child_end(); 1033}; 1034 1035/// VAArgExpr, used for the builtin function __builtin_va_start. 1036class VAArgExpr : public Expr { 1037 Expr *Val; 1038 SourceLocation BuiltinLoc, RParenLoc; 1039public: 1040 VAArgExpr(SourceLocation BLoc, Expr* e, QualType t, SourceLocation RPLoc) 1041 : Expr(VAArgExprClass, t), 1042 Val(e), 1043 BuiltinLoc(BLoc), 1044 RParenLoc(RPLoc) { } 1045 1046 const Expr *getSubExpr() const { return Val; } 1047 Expr *getSubExpr() { return Val; } 1048 virtual SourceRange getSourceRange() const { 1049 return SourceRange(BuiltinLoc, RParenLoc); 1050 } 1051 static bool classof(const Stmt *T) { 1052 return T->getStmtClass() == VAArgExprClass; 1053 } 1054 static bool classof(const VAArgExpr *) { return true; } 1055 1056 // Iterators 1057 virtual child_iterator child_begin(); 1058 virtual child_iterator child_end(); 1059}; 1060 1061/// InitListExpr, used for struct and array initializers. 1062class InitListExpr : public Expr { 1063 Expr **InitExprs; 1064 unsigned NumInits; 1065 SourceLocation LBraceLoc, RBraceLoc; 1066public: 1067 InitListExpr(SourceLocation lbraceloc, Expr **initexprs, unsigned numinits, 1068 SourceLocation rbraceloc); 1069 ~InitListExpr() { 1070 delete [] InitExprs; 1071 } 1072 1073 unsigned getNumInits() const { return NumInits; } 1074 1075 const Expr* getInit(unsigned Init) const { 1076 assert(Init < NumInits && "Initializer access out of range!"); 1077 return InitExprs[Init]; 1078 } 1079 1080 Expr* getInit(unsigned Init) { 1081 assert(Init < NumInits && "Initializer access out of range!"); 1082 return InitExprs[Init]; 1083 } 1084 1085 void setInit(unsigned Init, Expr *expr) { 1086 assert(Init < NumInits && "Initializer access out of range!"); 1087 InitExprs[Init] = expr; 1088 } 1089 1090 virtual SourceRange getSourceRange() const { 1091 return SourceRange(LBraceLoc, RBraceLoc); 1092 } 1093 static bool classof(const Stmt *T) { 1094 return T->getStmtClass() == InitListExprClass; 1095 } 1096 static bool classof(const InitListExpr *) { return true; } 1097 1098 // Iterators 1099 virtual child_iterator child_begin(); 1100 virtual child_iterator child_end(); 1101}; 1102 1103/// ObjCStringLiteral, used for Objective-C string literals 1104/// i.e. @"foo". 1105class ObjCStringLiteral : public Expr { 1106 StringLiteral *String; 1107 SourceLocation AtLoc; 1108public: 1109 ObjCStringLiteral(StringLiteral *SL, QualType T, SourceLocation L) 1110 : Expr(ObjCStringLiteralClass, T), String(SL), AtLoc(L) {} 1111 1112 StringLiteral* getString() { return String; } 1113 1114 const StringLiteral* getString() const { return String; } 1115 1116 virtual SourceRange getSourceRange() const { 1117 return SourceRange(AtLoc, String->getLocEnd()); 1118 } 1119 1120 static bool classof(const Stmt *T) { 1121 return T->getStmtClass() == ObjCStringLiteralClass; 1122 } 1123 static bool classof(const ObjCStringLiteral *) { return true; } 1124 1125 // Iterators 1126 virtual child_iterator child_begin(); 1127 virtual child_iterator child_end(); 1128}; 1129 1130/// ObjCEncodeExpr, used for @encode in Objective-C. 1131class ObjCEncodeExpr : public Expr { 1132 QualType EncType; 1133 SourceLocation AtLoc, RParenLoc; 1134public: 1135 ObjCEncodeExpr(QualType T, QualType ET, 1136 SourceLocation at, SourceLocation rp) 1137 : Expr(ObjCEncodeExprClass, T), EncType(ET), AtLoc(at), RParenLoc(rp) {} 1138 1139 SourceLocation getAtLoc() const { return AtLoc; } 1140 SourceLocation getRParenLoc() const { return RParenLoc; } 1141 1142 SourceRange getSourceRange() const { return SourceRange(AtLoc, RParenLoc); } 1143 1144 QualType getEncodedType() const { return EncType; } 1145 1146 static bool classof(const Stmt *T) { 1147 return T->getStmtClass() == ObjCEncodeExprClass; 1148 } 1149 static bool classof(const ObjCEncodeExpr *) { return true; } 1150 1151 // Iterators 1152 virtual child_iterator child_begin(); 1153 virtual child_iterator child_end(); 1154}; 1155 1156/// ObjCSelectorExpr used for @selector in Objective-C. 1157class ObjCSelectorExpr : public Expr { 1158 1159 Selector SelName; 1160 1161 SourceLocation AtLoc, RParenLoc; 1162public: 1163 ObjCSelectorExpr(QualType T, Selector selInfo, 1164 SourceLocation at, SourceLocation rp) 1165 : Expr(ObjCSelectorExprClass, T), SelName(selInfo), 1166 AtLoc(at), RParenLoc(rp) {} 1167 1168 const Selector &getSelector() const { return SelName; } 1169 Selector &getSelector() { return SelName; } 1170 1171 SourceLocation getAtLoc() const { return AtLoc; } 1172 SourceLocation getRParenLoc() const { return RParenLoc; } 1173 SourceRange getSourceRange() const { return SourceRange(AtLoc, RParenLoc); } 1174 1175 /// getNumArgs - Return the number of actual arguments to this call. 1176 unsigned getNumArgs() const { return SelName.getNumArgs(); } 1177 1178 static bool classof(const Stmt *T) { 1179 return T->getStmtClass() == ObjCSelectorExprClass; 1180 } 1181 static bool classof(const ObjCSelectorExpr *) { return true; } 1182 1183 // Iterators 1184 virtual child_iterator child_begin(); 1185 virtual child_iterator child_end(); 1186 1187}; 1188 1189/// ObjCProtocolExpr used for protocol in Objective-C. 1190class ObjCProtocolExpr : public Expr { 1191 1192 ObjcProtocolDecl *Protocol; 1193 1194 SourceLocation AtLoc, RParenLoc; 1195 public: 1196 ObjCProtocolExpr(QualType T, ObjcProtocolDecl *protocol, 1197 SourceLocation at, SourceLocation rp) 1198 : Expr(ObjCProtocolExprClass, T), Protocol(protocol), 1199 AtLoc(at), RParenLoc(rp) {} 1200 1201 ObjcProtocolDecl *getProtocol() const { return Protocol; } 1202 1203 SourceLocation getAtLoc() const { return AtLoc; } 1204 SourceLocation getRParenLoc() const { return RParenLoc; } 1205 SourceRange getSourceRange() const { return SourceRange(AtLoc, RParenLoc); } 1206 1207 static bool classof(const Stmt *T) { 1208 return T->getStmtClass() == ObjCProtocolExprClass; 1209 } 1210 static bool classof(const ObjCProtocolExpr *) { return true; } 1211 1212 // Iterators 1213 virtual child_iterator child_begin(); 1214 virtual child_iterator child_end(); 1215 1216}; 1217 1218class ObjCMessageExpr : public Expr { 1219 enum { RECEIVER=0, ARGS_START=1 }; 1220 1221 Expr **SubExprs; 1222 1223 // A unigue name for this message. 1224 Selector SelName; 1225 1226 // A method prototype for this message (optional). 1227 // FIXME: Since method decls contain the selector, and most messages have a 1228 // prototype, consider devising a scheme for unifying SelName/MethodProto. 1229 ObjcMethodDecl *MethodProto; 1230 1231 IdentifierInfo *ClassName; // optional - 0 for instance messages. 1232 1233 SourceLocation LBracloc, RBracloc; 1234public: 1235 // constructor for class messages. 1236 // FIXME: clsName should be typed to ObjCInterfaceType 1237 ObjCMessageExpr(IdentifierInfo *clsName, Selector selInfo, 1238 QualType retType, ObjcMethodDecl *methDecl, 1239 SourceLocation LBrac, SourceLocation RBrac, 1240 Expr **ArgExprs); 1241 // constructor for instance messages. 1242 ObjCMessageExpr(Expr *receiver, Selector selInfo, 1243 QualType retType, ObjcMethodDecl *methDecl, 1244 SourceLocation LBrac, SourceLocation RBrac, 1245 Expr **ArgExprs); 1246 ~ObjCMessageExpr() { 1247 delete [] SubExprs; 1248 } 1249 1250 const Expr *getReceiver() const { return SubExprs[RECEIVER]; } 1251 Expr *getReceiver() { return SubExprs[RECEIVER]; } 1252 1253 const Selector &getSelector() const { return SelName; } 1254 Selector &getSelector() { return SelName; } 1255 1256 const ObjcMethodDecl *getMethodDecl() const { return MethodProto; } 1257 ObjcMethodDecl *getMethodDecl() { return MethodProto; } 1258 1259 const IdentifierInfo *getClassName() const { return ClassName; } 1260 IdentifierInfo *getClassName() { return ClassName; } 1261 1262 /// getNumArgs - Return the number of actual arguments to this call. 1263 unsigned getNumArgs() const { return SelName.getNumArgs(); } 1264 1265/// getArg - Return the specified argument. 1266 Expr *getArg(unsigned Arg) { 1267 assert(Arg < SelName.getNumArgs() && "Arg access out of range!"); 1268 return SubExprs[Arg+ARGS_START]; 1269 } 1270 const Expr *getArg(unsigned Arg) const { 1271 assert(Arg < SelName.getNumArgs() && "Arg access out of range!"); 1272 return SubExprs[Arg+ARGS_START]; 1273 } 1274 /// setArg - Set the specified argument. 1275 void setArg(unsigned Arg, Expr *ArgExpr) { 1276 assert(Arg < SelName.getNumArgs() && "Arg access out of range!"); 1277 SubExprs[Arg+ARGS_START] = ArgExpr; 1278 } 1279 SourceRange getSourceRange() const { return SourceRange(LBracloc, RBracloc); } 1280 1281 static bool classof(const Stmt *T) { 1282 return T->getStmtClass() == ObjCMessageExprClass; 1283 } 1284 static bool classof(const ObjCMessageExpr *) { return true; } 1285 1286 // Iterators 1287 virtual child_iterator child_begin(); 1288 virtual child_iterator child_end(); 1289}; 1290 1291} // end namespace clang 1292 1293#endif 1294