Expr.h revision ec0aa78745f7b3bc96c20fffd1115bf26aaa0ead
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 EmitImpl(llvm::Serializer& S) const; 147 static DeclRefExpr* CreateImpl(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 EmitImpl(llvm::Serializer& S) const; 180 static PreDefinedExpr* CreateImpl(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 EmitImpl(llvm::Serializer& S) const; 206 static IntegerLiteral* CreateImpl(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 EmitImpl(llvm::Serializer& S) const; 233 static CharacterLiteral* CreateImpl(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 EmitImpl(llvm::Serializer& S) const; 268 static FloatingLiteral* CreateImpl(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 EmitImpl(llvm::Serializer& S) const; 296 static ImaginaryLiteral* CreateImpl(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 EmitImpl(llvm::Serializer& S) const; 333 static StringLiteral* CreateImpl(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 EmitImpl(llvm::Serializer& S) const; 359 static ParenExpr* CreateImpl(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 virtual void EmitImpl(llvm::Serializer& S) const; 436 static UnaryOperator* CreateImpl(llvm::Deserializer& D); 437}; 438 439/// SizeOfAlignOfTypeExpr - [C99 6.5.3.4] - This is only for sizeof/alignof of 440/// *types*. sizeof(expr) is handled by UnaryOperator. 441class SizeOfAlignOfTypeExpr : public Expr { 442 bool isSizeof; // true if sizeof, false if alignof. 443 QualType Ty; 444 SourceLocation OpLoc, RParenLoc; 445public: 446 SizeOfAlignOfTypeExpr(bool issizeof, QualType argType, QualType resultType, 447 SourceLocation op, SourceLocation rp) : 448 Expr(SizeOfAlignOfTypeExprClass, resultType), 449 isSizeof(issizeof), Ty(argType), OpLoc(op), RParenLoc(rp) {} 450 451 bool isSizeOf() const { return isSizeof; } 452 QualType getArgumentType() const { return Ty; } 453 454 SourceLocation getOperatorLoc() const { return OpLoc; } 455 SourceRange getSourceRange() const { return SourceRange(OpLoc, RParenLoc); } 456 457 static bool classof(const Stmt *T) { 458 return T->getStmtClass() == SizeOfAlignOfTypeExprClass; 459 } 460 static bool classof(const SizeOfAlignOfTypeExpr *) { return true; } 461 462 // Iterators 463 virtual child_iterator child_begin(); 464 virtual child_iterator child_end(); 465}; 466 467//===----------------------------------------------------------------------===// 468// Postfix Operators. 469//===----------------------------------------------------------------------===// 470 471/// ArraySubscriptExpr - [C99 6.5.2.1] Array Subscripting. 472class ArraySubscriptExpr : public Expr { 473 enum { LHS, RHS, END_EXPR=2 }; 474 Expr* SubExprs[END_EXPR]; 475 SourceLocation RBracketLoc; 476public: 477 ArraySubscriptExpr(Expr *lhs, Expr *rhs, QualType t, 478 SourceLocation rbracketloc) 479 : Expr(ArraySubscriptExprClass, t), RBracketLoc(rbracketloc) { 480 SubExprs[LHS] = lhs; 481 SubExprs[RHS] = rhs; 482 } 483 484 /// An array access can be written A[4] or 4[A] (both are equivalent). 485 /// - getBase() and getIdx() always present the normalized view: A[4]. 486 /// In this case getBase() returns "A" and getIdx() returns "4". 487 /// - getLHS() and getRHS() present the syntactic view. e.g. for 488 /// 4[A] getLHS() returns "4". 489 490 Expr *getLHS() { return SubExprs[LHS]; } 491 const Expr *getLHS() const { return SubExprs[LHS]; } 492 493 Expr *getRHS() { return SubExprs[RHS]; } 494 const Expr *getRHS() const { return SubExprs[RHS]; } 495 496 Expr *getBase() { 497 return (getLHS()->getType()->isIntegerType()) ? getRHS() : getLHS(); 498 } 499 500 const Expr *getBase() const { 501 return (getLHS()->getType()->isIntegerType()) ? getRHS() : getLHS(); 502 } 503 504 Expr *getIdx() { 505 return (getLHS()->getType()->isIntegerType()) ? getLHS() : getRHS(); 506 } 507 508 const Expr *getIdx() const { 509 return (getLHS()->getType()->isIntegerType()) ? getLHS() : getRHS(); 510 } 511 512 513 SourceRange getSourceRange() const { 514 return SourceRange(getLHS()->getLocStart(), RBracketLoc); 515 } 516 virtual SourceLocation getExprLoc() const { return RBracketLoc; } 517 518 static bool classof(const Stmt *T) { 519 return T->getStmtClass() == ArraySubscriptExprClass; 520 } 521 static bool classof(const ArraySubscriptExpr *) { return true; } 522 523 // Iterators 524 virtual child_iterator child_begin(); 525 virtual child_iterator child_end(); 526 527 virtual void EmitImpl(llvm::Serializer& S) const; 528 static ArraySubscriptExpr* CreateImpl(llvm::Deserializer& D); 529}; 530 531 532/// CallExpr - [C99 6.5.2.2] Function Calls. 533/// 534class CallExpr : public Expr { 535 enum { FN=0, ARGS_START=1 }; 536 Expr **SubExprs; 537 unsigned NumArgs; 538 SourceLocation RParenLoc; 539 540 // This version of the ctor is for deserialization. 541 CallExpr(Expr** subexprs, unsigned numargs, QualType t, 542 SourceLocation rparenloc) 543 : Expr(CallExprClass,t), SubExprs(subexprs), 544 NumArgs(numargs), RParenLoc(rparenloc) {} 545 546public: 547 CallExpr(Expr *fn, Expr **args, unsigned numargs, QualType t, 548 SourceLocation rparenloc); 549 ~CallExpr() { 550 delete [] SubExprs; 551 } 552 553 const Expr *getCallee() const { return SubExprs[FN]; } 554 Expr *getCallee() { return SubExprs[FN]; } 555 556 /// getNumArgs - Return the number of actual arguments to this call. 557 /// 558 unsigned getNumArgs() const { return NumArgs; } 559 560 /// getArg - Return the specified argument. 561 Expr *getArg(unsigned Arg) { 562 assert(Arg < NumArgs && "Arg access out of range!"); 563 return SubExprs[Arg+ARGS_START]; 564 } 565 const Expr *getArg(unsigned Arg) const { 566 assert(Arg < NumArgs && "Arg access out of range!"); 567 return SubExprs[Arg+ARGS_START]; 568 } 569 /// setArg - Set the specified argument. 570 void setArg(unsigned Arg, Expr *ArgExpr) { 571 assert(Arg < NumArgs && "Arg access out of range!"); 572 SubExprs[Arg+ARGS_START] = ArgExpr; 573 } 574 /// getNumCommas - Return the number of commas that must have been present in 575 /// this function call. 576 unsigned getNumCommas() const { return NumArgs ? NumArgs - 1 : 0; } 577 578 bool isBuiltinClassifyType(llvm::APSInt &Result) const; 579 580 SourceRange getSourceRange() const { 581 return SourceRange(getCallee()->getLocStart(), RParenLoc); 582 } 583 584 static bool classof(const Stmt *T) { 585 return T->getStmtClass() == CallExprClass; 586 } 587 static bool classof(const CallExpr *) { return true; } 588 589 // Iterators 590 virtual child_iterator child_begin(); 591 virtual child_iterator child_end(); 592 593 virtual void EmitImpl(llvm::Serializer& S) const; 594 static CallExpr* CreateImpl(llvm::Deserializer& D); 595}; 596 597/// MemberExpr - [C99 6.5.2.3] Structure and Union Members. 598/// 599class MemberExpr : public Expr { 600 Expr *Base; 601 FieldDecl *MemberDecl; 602 SourceLocation MemberLoc; 603 bool IsArrow; // True if this is "X->F", false if this is "X.F". 604public: 605 MemberExpr(Expr *base, bool isarrow, FieldDecl *memberdecl, SourceLocation l) 606 : Expr(MemberExprClass, memberdecl->getType()), 607 Base(base), MemberDecl(memberdecl), MemberLoc(l), IsArrow(isarrow) {} 608 609 Expr *getBase() const { return Base; } 610 FieldDecl *getMemberDecl() const { return MemberDecl; } 611 bool isArrow() const { return IsArrow; } 612 613 virtual SourceRange getSourceRange() const { 614 return SourceRange(getBase()->getLocStart(), MemberLoc); 615 } 616 virtual SourceLocation getExprLoc() const { return MemberLoc; } 617 618 static bool classof(const Stmt *T) { 619 return T->getStmtClass() == MemberExprClass; 620 } 621 static bool classof(const MemberExpr *) { return true; } 622 623 // Iterators 624 virtual child_iterator child_begin(); 625 virtual child_iterator child_end(); 626}; 627 628/// OCUVectorElementExpr - This represents access to specific elements of a 629/// vector, and may occur on the left hand side or right hand side. For example 630/// the following is legal: "V.xy = V.zw" if V is a 4 element ocu vector. 631/// 632class OCUVectorElementExpr : public Expr { 633 Expr *Base; 634 IdentifierInfo &Accessor; 635 SourceLocation AccessorLoc; 636public: 637 enum ElementType { 638 Point, // xywz 639 Color, // rgba 640 Texture // stpq 641 }; 642 OCUVectorElementExpr(QualType ty, Expr *base, IdentifierInfo &accessor, 643 SourceLocation loc) 644 : Expr(OCUVectorElementExprClass, ty), 645 Base(base), Accessor(accessor), AccessorLoc(loc) {} 646 647 const Expr *getBase() const { return Base; } 648 Expr *getBase() { return Base; } 649 650 IdentifierInfo &getAccessor() const { return Accessor; } 651 652 /// getNumElements - Get the number of components being selected. 653 unsigned getNumElements() const; 654 655 /// getElementType - Determine whether the components of this access are 656 /// "point" "color" or "texture" elements. 657 ElementType getElementType() const; 658 659 /// containsDuplicateElements - Return true if any element access is 660 /// repeated. 661 bool containsDuplicateElements() const; 662 663 /// getEncodedElementAccess - Encode the elements accessed into a bit vector. 664 /// The encoding currently uses 2-bit bitfields, but clients should use the 665 /// accessors below to access them. 666 /// 667 unsigned getEncodedElementAccess() const; 668 669 /// getAccessedFieldNo - Given an encoded value and a result number, return 670 /// the input field number being accessed. 671 static unsigned getAccessedFieldNo(unsigned Idx, unsigned EncodedVal) { 672 return (EncodedVal >> (Idx*2)) & 3; 673 } 674 675 virtual SourceRange getSourceRange() const { 676 return SourceRange(getBase()->getLocStart(), AccessorLoc); 677 } 678 static bool classof(const Stmt *T) { 679 return T->getStmtClass() == OCUVectorElementExprClass; 680 } 681 static bool classof(const OCUVectorElementExpr *) { return true; } 682 683 // Iterators 684 virtual child_iterator child_begin(); 685 virtual child_iterator child_end(); 686}; 687 688/// CompoundLiteralExpr - [C99 6.5.2.5] 689/// 690class CompoundLiteralExpr : public Expr { 691 Expr *Init; 692public: 693 CompoundLiteralExpr(QualType ty, Expr *init) : 694 Expr(CompoundLiteralExprClass, ty), Init(init) {} 695 696 const Expr *getInitializer() const { return Init; } 697 Expr *getInitializer() { return Init; } 698 699 virtual SourceRange getSourceRange() const { 700 if (Init) 701 return Init->getSourceRange(); 702 return SourceRange(); 703 } 704 705 static bool classof(const Stmt *T) { 706 return T->getStmtClass() == CompoundLiteralExprClass; 707 } 708 static bool classof(const CompoundLiteralExpr *) { return true; } 709 710 // Iterators 711 virtual child_iterator child_begin(); 712 virtual child_iterator child_end(); 713}; 714 715/// ImplicitCastExpr - Allows us to explicitly represent implicit type 716/// conversions. For example: converting T[]->T*, void f()->void (*f)(), 717/// float->double, short->int, etc. 718/// 719class ImplicitCastExpr : public Expr { 720 Expr *Op; 721public: 722 ImplicitCastExpr(QualType ty, Expr *op) : 723 Expr(ImplicitCastExprClass, ty), Op(op) {} 724 725 Expr *getSubExpr() { return Op; } 726 const Expr *getSubExpr() const { return Op; } 727 728 virtual SourceRange getSourceRange() const { return Op->getSourceRange(); } 729 730 static bool classof(const Stmt *T) { 731 return T->getStmtClass() == ImplicitCastExprClass; 732 } 733 static bool classof(const ImplicitCastExpr *) { return true; } 734 735 // Iterators 736 virtual child_iterator child_begin(); 737 virtual child_iterator child_end(); 738 739 virtual void EmitImpl(llvm::Serializer& S) const; 740 static ImplicitCastExpr* CreateImpl(llvm::Deserializer& D); 741}; 742 743/// CastExpr - [C99 6.5.4] Cast Operators. 744/// 745class CastExpr : public Expr { 746 Expr *Op; 747 SourceLocation Loc; // the location of the left paren 748public: 749 CastExpr(QualType ty, Expr *op, SourceLocation l) : 750 Expr(CastExprClass, ty), Op(op), Loc(l) {} 751 752 SourceLocation getLParenLoc() const { return Loc; } 753 754 Expr *getSubExpr() const { return Op; } 755 756 virtual SourceRange getSourceRange() const { 757 return SourceRange(Loc, getSubExpr()->getSourceRange().getEnd()); 758 } 759 static bool classof(const Stmt *T) { 760 return T->getStmtClass() == CastExprClass; 761 } 762 static bool classof(const CastExpr *) { return true; } 763 764 // Iterators 765 virtual child_iterator child_begin(); 766 virtual child_iterator child_end(); 767 768 virtual void EmitImpl(llvm::Serializer& S) const; 769 static CastExpr* CreateImpl(llvm::Deserializer& D); 770}; 771 772class BinaryOperator : public Expr { 773public: 774 enum Opcode { 775 // Operators listed in order of precedence. 776 // Note that additions to this should also update the StmtVisitor class. 777 Mul, Div, Rem, // [C99 6.5.5] Multiplicative operators. 778 Add, Sub, // [C99 6.5.6] Additive operators. 779 Shl, Shr, // [C99 6.5.7] Bitwise shift operators. 780 LT, GT, LE, GE, // [C99 6.5.8] Relational operators. 781 EQ, NE, // [C99 6.5.9] Equality operators. 782 And, // [C99 6.5.10] Bitwise AND operator. 783 Xor, // [C99 6.5.11] Bitwise XOR operator. 784 Or, // [C99 6.5.12] Bitwise OR operator. 785 LAnd, // [C99 6.5.13] Logical AND operator. 786 LOr, // [C99 6.5.14] Logical OR operator. 787 Assign, MulAssign,// [C99 6.5.16] Assignment operators. 788 DivAssign, RemAssign, 789 AddAssign, SubAssign, 790 ShlAssign, ShrAssign, 791 AndAssign, XorAssign, 792 OrAssign, 793 Comma // [C99 6.5.17] Comma operator. 794 }; 795private: 796 enum { LHS, RHS, END_EXPR }; 797 Expr* SubExprs[END_EXPR]; 798 Opcode Opc; 799 SourceLocation OpLoc; 800public: 801 802 BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, 803 SourceLocation opLoc) 804 : Expr(BinaryOperatorClass, ResTy), Opc(opc), OpLoc(opLoc) { 805 SubExprs[LHS] = lhs; 806 SubExprs[RHS] = rhs; 807 assert(!isCompoundAssignmentOp() && 808 "Use ArithAssignBinaryOperator for compound assignments"); 809 } 810 811 SourceLocation getOperatorLoc() const { return OpLoc; } 812 Opcode getOpcode() const { return Opc; } 813 Expr *getLHS() const { return SubExprs[LHS]; } 814 Expr *getRHS() const { return SubExprs[RHS]; } 815 virtual SourceRange getSourceRange() const { 816 return SourceRange(getLHS()->getLocStart(), getRHS()->getLocEnd()); 817 } 818 819 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 820 /// corresponds to, e.g. "<<=". 821 static const char *getOpcodeStr(Opcode Op); 822 823 /// predicates to categorize the respective opcodes. 824 bool isMultiplicativeOp() const { return Opc >= Mul && Opc <= Rem; } 825 bool isAdditiveOp() const { return Opc == Add || Opc == Sub; } 826 bool isShiftOp() const { return Opc == Shl || Opc == Shr; } 827 bool isBitwiseOp() const { return Opc >= And && Opc <= Or; } 828 bool isRelationalOp() const { return Opc >= LT && Opc <= GE; } 829 bool isEqualityOp() const { return Opc == EQ || Opc == NE; } 830 bool isLogicalOp() const { return Opc == LAnd || Opc == LOr; } 831 bool isAssignmentOp() const { return Opc >= Assign && Opc <= OrAssign; } 832 bool isCompoundAssignmentOp() const { return Opc > Assign && Opc <= OrAssign;} 833 bool isShiftAssignOp() const { return Opc == ShlAssign || Opc == ShrAssign; } 834 835 static bool classof(const Stmt *S) { 836 return S->getStmtClass() == BinaryOperatorClass || 837 S->getStmtClass() == CompoundAssignOperatorClass; 838 } 839 static bool classof(const BinaryOperator *) { return true; } 840 841 // Iterators 842 virtual child_iterator child_begin(); 843 virtual child_iterator child_end(); 844 845 virtual void EmitImpl(llvm::Serializer& S) const; 846 static BinaryOperator* CreateImpl(llvm::Deserializer& D); 847 848protected: 849 BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, 850 SourceLocation oploc, bool dead) 851 : Expr(CompoundAssignOperatorClass, ResTy), Opc(opc), OpLoc(oploc) { 852 SubExprs[LHS] = lhs; 853 SubExprs[RHS] = rhs; 854 } 855}; 856 857/// CompoundAssignOperator - For compound assignments (e.g. +=), we keep 858/// track of the type the operation is performed in. Due to the semantics of 859/// these operators, the operands are promoted, the aritmetic performed, an 860/// implicit conversion back to the result type done, then the assignment takes 861/// place. This captures the intermediate type which the computation is done 862/// in. 863class CompoundAssignOperator : public BinaryOperator { 864 QualType ComputationType; 865public: 866 CompoundAssignOperator(Expr *lhs, Expr *rhs, Opcode opc, 867 QualType ResType, QualType CompType, 868 SourceLocation OpLoc) 869 : BinaryOperator(lhs, rhs, opc, ResType, OpLoc, true), 870 ComputationType(CompType) { 871 assert(isCompoundAssignmentOp() && 872 "Only should be used for compound assignments"); 873 } 874 875 QualType getComputationType() const { return ComputationType; } 876 877 static bool classof(const CompoundAssignOperator *) { return true; } 878 static bool classof(const Stmt *S) { 879 return S->getStmtClass() == CompoundAssignOperatorClass; 880 } 881 882 virtual void EmitImpl(llvm::Serializer& S) const; 883 static CompoundAssignOperator* CreateImpl(llvm::Deserializer& D); 884}; 885 886/// ConditionalOperator - The ?: operator. Note that LHS may be null when the 887/// GNU "missing LHS" extension is in use. 888/// 889class ConditionalOperator : public Expr { 890 enum { COND, LHS, RHS, END_EXPR }; 891 Expr* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. 892public: 893 ConditionalOperator(Expr *cond, Expr *lhs, Expr *rhs, QualType t) 894 : Expr(ConditionalOperatorClass, t) { 895 SubExprs[COND] = cond; 896 SubExprs[LHS] = lhs; 897 SubExprs[RHS] = rhs; 898 } 899 900 Expr *getCond() const { return SubExprs[COND]; } 901 Expr *getLHS() const { return SubExprs[LHS]; } 902 Expr *getRHS() const { return SubExprs[RHS]; } 903 904 virtual SourceRange getSourceRange() const { 905 return SourceRange(getCond()->getLocStart(), getRHS()->getLocEnd()); 906 } 907 static bool classof(const Stmt *T) { 908 return T->getStmtClass() == ConditionalOperatorClass; 909 } 910 static bool classof(const ConditionalOperator *) { return true; } 911 912 // Iterators 913 virtual child_iterator child_begin(); 914 virtual child_iterator child_end(); 915 916 virtual void EmitImpl(llvm::Serializer& S) const; 917 static ConditionalOperator* CreateImpl(llvm::Deserializer& D); 918}; 919 920/// AddrLabelExpr - The GNU address of label extension, representing &&label. 921class AddrLabelExpr : public Expr { 922 SourceLocation AmpAmpLoc, LabelLoc; 923 LabelStmt *Label; 924public: 925 AddrLabelExpr(SourceLocation AALoc, SourceLocation LLoc, LabelStmt *L, 926 QualType t) 927 : Expr(AddrLabelExprClass, t), AmpAmpLoc(AALoc), LabelLoc(LLoc), Label(L) {} 928 929 virtual SourceRange getSourceRange() const { 930 return SourceRange(AmpAmpLoc, LabelLoc); 931 } 932 933 LabelStmt *getLabel() const { return Label; } 934 935 static bool classof(const Stmt *T) { 936 return T->getStmtClass() == AddrLabelExprClass; 937 } 938 static bool classof(const AddrLabelExpr *) { return true; } 939 940 // Iterators 941 virtual child_iterator child_begin(); 942 virtual child_iterator child_end(); 943 944 virtual void EmitImpl(llvm::Serializer& S) const; 945 static AddrLabelExpr* CreateImpl(llvm::Deserializer& D); 946}; 947 948/// StmtExpr - This is the GNU Statement Expression extension: ({int X=4; X;}). 949/// The StmtExpr contains a single CompoundStmt node, which it evaluates and 950/// takes the value of the last subexpression. 951class StmtExpr : public Expr { 952 CompoundStmt *SubStmt; 953 SourceLocation LParenLoc, RParenLoc; 954public: 955 StmtExpr(CompoundStmt *substmt, QualType T, 956 SourceLocation lp, SourceLocation rp) : 957 Expr(StmtExprClass, T), SubStmt(substmt), LParenLoc(lp), RParenLoc(rp) { } 958 959 CompoundStmt *getSubStmt() { return SubStmt; } 960 const CompoundStmt *getSubStmt() const { return SubStmt; } 961 962 virtual SourceRange getSourceRange() const { 963 return SourceRange(LParenLoc, RParenLoc); 964 } 965 966 static bool classof(const Stmt *T) { 967 return T->getStmtClass() == StmtExprClass; 968 } 969 static bool classof(const StmtExpr *) { return true; } 970 971 // Iterators 972 virtual child_iterator child_begin(); 973 virtual child_iterator child_end(); 974 975 virtual void EmitImpl(llvm::Serializer& S) const; 976 static StmtExpr* CreateImpl(llvm::Deserializer& D); 977}; 978 979/// TypesCompatibleExpr - GNU builtin-in function __builtin_type_compatible_p. 980/// This AST node represents a function that returns 1 if two *types* (not 981/// expressions) are compatible. The result of this built-in function can be 982/// used in integer constant expressions. 983class TypesCompatibleExpr : public Expr { 984 QualType Type1; 985 QualType Type2; 986 SourceLocation BuiltinLoc, RParenLoc; 987public: 988 TypesCompatibleExpr(QualType ReturnType, SourceLocation BLoc, 989 QualType t1, QualType t2, SourceLocation RP) : 990 Expr(TypesCompatibleExprClass, ReturnType), Type1(t1), Type2(t2), 991 BuiltinLoc(BLoc), RParenLoc(RP) {} 992 993 QualType getArgType1() const { return Type1; } 994 QualType getArgType2() const { return Type2; } 995 996 virtual SourceRange getSourceRange() const { 997 return SourceRange(BuiltinLoc, RParenLoc); 998 } 999 static bool classof(const Stmt *T) { 1000 return T->getStmtClass() == TypesCompatibleExprClass; 1001 } 1002 static bool classof(const TypesCompatibleExpr *) { return true; } 1003 1004 // Iterators 1005 virtual child_iterator child_begin(); 1006 virtual child_iterator child_end(); 1007}; 1008 1009/// ChooseExpr - GNU builtin-in function __builtin_choose_expr. 1010/// This AST node is similar to the conditional operator (?:) in C, with 1011/// the following exceptions: 1012/// - the test expression much be a constant expression. 1013/// - the expression returned has it's type unaltered by promotion rules. 1014/// - does not evaluate the expression that was not chosen. 1015class ChooseExpr : public Expr { 1016 enum { COND, LHS, RHS, END_EXPR }; 1017 Expr* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. 1018 SourceLocation BuiltinLoc, RParenLoc; 1019public: 1020 ChooseExpr(SourceLocation BLoc, Expr *cond, Expr *lhs, Expr *rhs, QualType t, 1021 SourceLocation RP) 1022 : Expr(ChooseExprClass, t), 1023 BuiltinLoc(BLoc), RParenLoc(RP) { 1024 SubExprs[COND] = cond; 1025 SubExprs[LHS] = lhs; 1026 SubExprs[RHS] = rhs; 1027 } 1028 1029 /// isConditionTrue - Return true if the condition is true. This is always 1030 /// statically knowable for a well-formed choosexpr. 1031 bool isConditionTrue(ASTContext &C) const; 1032 1033 Expr *getCond() const { return SubExprs[COND]; } 1034 Expr *getLHS() const { return SubExprs[LHS]; } 1035 Expr *getRHS() const { return SubExprs[RHS]; } 1036 1037 virtual SourceRange getSourceRange() const { 1038 return SourceRange(BuiltinLoc, RParenLoc); 1039 } 1040 static bool classof(const Stmt *T) { 1041 return T->getStmtClass() == ChooseExprClass; 1042 } 1043 static bool classof(const ChooseExpr *) { return true; } 1044 1045 // Iterators 1046 virtual child_iterator child_begin(); 1047 virtual child_iterator child_end(); 1048}; 1049 1050/// VAArgExpr, used for the builtin function __builtin_va_start. 1051class VAArgExpr : public Expr { 1052 Expr *Val; 1053 SourceLocation BuiltinLoc, RParenLoc; 1054public: 1055 VAArgExpr(SourceLocation BLoc, Expr* e, QualType t, SourceLocation RPLoc) 1056 : Expr(VAArgExprClass, t), 1057 Val(e), 1058 BuiltinLoc(BLoc), 1059 RParenLoc(RPLoc) { } 1060 1061 const Expr *getSubExpr() const { return Val; } 1062 Expr *getSubExpr() { return Val; } 1063 virtual SourceRange getSourceRange() const { 1064 return SourceRange(BuiltinLoc, RParenLoc); 1065 } 1066 static bool classof(const Stmt *T) { 1067 return T->getStmtClass() == VAArgExprClass; 1068 } 1069 static bool classof(const VAArgExpr *) { return true; } 1070 1071 // Iterators 1072 virtual child_iterator child_begin(); 1073 virtual child_iterator child_end(); 1074}; 1075 1076/// InitListExpr, used for struct and array initializers. 1077class InitListExpr : public Expr { 1078 Expr **InitExprs; 1079 unsigned NumInits; 1080 SourceLocation LBraceLoc, RBraceLoc; 1081public: 1082 InitListExpr(SourceLocation lbraceloc, Expr **initexprs, unsigned numinits, 1083 SourceLocation rbraceloc); 1084 ~InitListExpr() { 1085 delete [] InitExprs; 1086 } 1087 1088 unsigned getNumInits() const { return NumInits; } 1089 1090 const Expr* getInit(unsigned Init) const { 1091 assert(Init < NumInits && "Initializer access out of range!"); 1092 return InitExprs[Init]; 1093 } 1094 1095 Expr* getInit(unsigned Init) { 1096 assert(Init < NumInits && "Initializer access out of range!"); 1097 return InitExprs[Init]; 1098 } 1099 1100 void setInit(unsigned Init, Expr *expr) { 1101 assert(Init < NumInits && "Initializer access out of range!"); 1102 InitExprs[Init] = expr; 1103 } 1104 1105 virtual SourceRange getSourceRange() const { 1106 return SourceRange(LBraceLoc, RBraceLoc); 1107 } 1108 static bool classof(const Stmt *T) { 1109 return T->getStmtClass() == InitListExprClass; 1110 } 1111 static bool classof(const InitListExpr *) { return true; } 1112 1113 // Iterators 1114 virtual child_iterator child_begin(); 1115 virtual child_iterator child_end(); 1116}; 1117 1118/// ObjCStringLiteral, used for Objective-C string literals 1119/// i.e. @"foo". 1120class ObjCStringLiteral : public Expr { 1121 StringLiteral *String; 1122 SourceLocation AtLoc; 1123public: 1124 ObjCStringLiteral(StringLiteral *SL, QualType T, SourceLocation L) 1125 : Expr(ObjCStringLiteralClass, T), String(SL), AtLoc(L) {} 1126 1127 StringLiteral* getString() { return String; } 1128 1129 const StringLiteral* getString() const { return String; } 1130 1131 virtual SourceRange getSourceRange() const { 1132 return SourceRange(AtLoc, String->getLocEnd()); 1133 } 1134 1135 static bool classof(const Stmt *T) { 1136 return T->getStmtClass() == ObjCStringLiteralClass; 1137 } 1138 static bool classof(const ObjCStringLiteral *) { return true; } 1139 1140 // Iterators 1141 virtual child_iterator child_begin(); 1142 virtual child_iterator child_end(); 1143}; 1144 1145/// ObjCEncodeExpr, used for @encode in Objective-C. 1146class ObjCEncodeExpr : public Expr { 1147 QualType EncType; 1148 SourceLocation AtLoc, RParenLoc; 1149public: 1150 ObjCEncodeExpr(QualType T, QualType ET, 1151 SourceLocation at, SourceLocation rp) 1152 : Expr(ObjCEncodeExprClass, T), EncType(ET), AtLoc(at), RParenLoc(rp) {} 1153 1154 SourceLocation getAtLoc() const { return AtLoc; } 1155 SourceLocation getRParenLoc() const { return RParenLoc; } 1156 1157 SourceRange getSourceRange() const { return SourceRange(AtLoc, RParenLoc); } 1158 1159 QualType getEncodedType() const { return EncType; } 1160 1161 static bool classof(const Stmt *T) { 1162 return T->getStmtClass() == ObjCEncodeExprClass; 1163 } 1164 static bool classof(const ObjCEncodeExpr *) { return true; } 1165 1166 // Iterators 1167 virtual child_iterator child_begin(); 1168 virtual child_iterator child_end(); 1169}; 1170 1171/// ObjCSelectorExpr used for @selector in Objective-C. 1172class ObjCSelectorExpr : public Expr { 1173 1174 Selector SelName; 1175 1176 SourceLocation AtLoc, RParenLoc; 1177public: 1178 ObjCSelectorExpr(QualType T, Selector selInfo, 1179 SourceLocation at, SourceLocation rp) 1180 : Expr(ObjCSelectorExprClass, T), SelName(selInfo), 1181 AtLoc(at), RParenLoc(rp) {} 1182 1183 const Selector &getSelector() const { return SelName; } 1184 Selector &getSelector() { return SelName; } 1185 1186 SourceLocation getAtLoc() const { return AtLoc; } 1187 SourceLocation getRParenLoc() const { return RParenLoc; } 1188 SourceRange getSourceRange() const { return SourceRange(AtLoc, RParenLoc); } 1189 1190 /// getNumArgs - Return the number of actual arguments to this call. 1191 unsigned getNumArgs() const { return SelName.getNumArgs(); } 1192 1193 static bool classof(const Stmt *T) { 1194 return T->getStmtClass() == ObjCSelectorExprClass; 1195 } 1196 static bool classof(const ObjCSelectorExpr *) { return true; } 1197 1198 // Iterators 1199 virtual child_iterator child_begin(); 1200 virtual child_iterator child_end(); 1201 1202}; 1203 1204/// ObjCProtocolExpr used for protocol in Objective-C. 1205class ObjCProtocolExpr : public Expr { 1206 1207 ObjcProtocolDecl *Protocol; 1208 1209 SourceLocation AtLoc, RParenLoc; 1210 public: 1211 ObjCProtocolExpr(QualType T, ObjcProtocolDecl *protocol, 1212 SourceLocation at, SourceLocation rp) 1213 : Expr(ObjCProtocolExprClass, T), Protocol(protocol), 1214 AtLoc(at), RParenLoc(rp) {} 1215 1216 ObjcProtocolDecl *getProtocol() const { return Protocol; } 1217 1218 SourceLocation getAtLoc() const { return AtLoc; } 1219 SourceLocation getRParenLoc() const { return RParenLoc; } 1220 SourceRange getSourceRange() const { return SourceRange(AtLoc, RParenLoc); } 1221 1222 static bool classof(const Stmt *T) { 1223 return T->getStmtClass() == ObjCProtocolExprClass; 1224 } 1225 static bool classof(const ObjCProtocolExpr *) { return true; } 1226 1227 // Iterators 1228 virtual child_iterator child_begin(); 1229 virtual child_iterator child_end(); 1230 1231}; 1232 1233/// ObjCIvarRefExpr - A reference to an ObjC instance variable. 1234class ObjCIvarRefExpr : public Expr { 1235 class ObjcIvarDecl *D; 1236 SourceLocation Loc; 1237public: 1238 ObjCIvarRefExpr(ObjcIvarDecl *d, QualType t, SourceLocation l) : 1239 Expr(ObjCIvarRefExprClass, t), D(d), Loc(l) {} 1240 1241 ObjcIvarDecl *getDecl() { return D; } 1242 const ObjcIvarDecl *getDecl() const { return D; } 1243 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 1244 1245 static bool classof(const Stmt *T) { 1246 return T->getStmtClass() == ObjCIvarRefExprClass; 1247 } 1248 static bool classof(const ObjCIvarRefExpr *) { return true; } 1249 1250 // Iterators 1251 virtual child_iterator child_begin(); 1252 virtual child_iterator child_end(); 1253 1254 virtual void EmitImpl(llvm::Serializer& S) const; 1255 static ObjCIvarRefExpr* CreateImpl(llvm::Deserializer& D); 1256}; 1257 1258class ObjCMessageExpr : public Expr { 1259 enum { RECEIVER=0, ARGS_START=1 }; 1260 1261 Expr **SubExprs; 1262 1263 // A unigue name for this message. 1264 Selector SelName; 1265 1266 // A method prototype for this message (optional). 1267 // FIXME: Since method decls contain the selector, and most messages have a 1268 // prototype, consider devising a scheme for unifying SelName/MethodProto. 1269 ObjcMethodDecl *MethodProto; 1270 1271 IdentifierInfo *ClassName; // optional - 0 for instance messages. 1272 1273 SourceLocation LBracloc, RBracloc; 1274public: 1275 // constructor for class messages. 1276 // FIXME: clsName should be typed to ObjCInterfaceType 1277 ObjCMessageExpr(IdentifierInfo *clsName, Selector selInfo, 1278 QualType retType, ObjcMethodDecl *methDecl, 1279 SourceLocation LBrac, SourceLocation RBrac, 1280 Expr **ArgExprs); 1281 // constructor for instance messages. 1282 ObjCMessageExpr(Expr *receiver, Selector selInfo, 1283 QualType retType, ObjcMethodDecl *methDecl, 1284 SourceLocation LBrac, SourceLocation RBrac, 1285 Expr **ArgExprs); 1286 ~ObjCMessageExpr() { 1287 delete [] SubExprs; 1288 } 1289 1290 const Expr *getReceiver() const { return SubExprs[RECEIVER]; } 1291 Expr *getReceiver() { return SubExprs[RECEIVER]; } 1292 1293 const Selector &getSelector() const { return SelName; } 1294 Selector &getSelector() { return SelName; } 1295 1296 const ObjcMethodDecl *getMethodDecl() const { return MethodProto; } 1297 ObjcMethodDecl *getMethodDecl() { return MethodProto; } 1298 1299 const IdentifierInfo *getClassName() const { return ClassName; } 1300 IdentifierInfo *getClassName() { return ClassName; } 1301 1302 /// getNumArgs - Return the number of actual arguments to this call. 1303 unsigned getNumArgs() const { return SelName.getNumArgs(); } 1304 1305/// getArg - Return the specified argument. 1306 Expr *getArg(unsigned Arg) { 1307 assert(Arg < SelName.getNumArgs() && "Arg access out of range!"); 1308 return SubExprs[Arg+ARGS_START]; 1309 } 1310 const Expr *getArg(unsigned Arg) const { 1311 assert(Arg < SelName.getNumArgs() && "Arg access out of range!"); 1312 return SubExprs[Arg+ARGS_START]; 1313 } 1314 /// setArg - Set the specified argument. 1315 void setArg(unsigned Arg, Expr *ArgExpr) { 1316 assert(Arg < SelName.getNumArgs() && "Arg access out of range!"); 1317 SubExprs[Arg+ARGS_START] = ArgExpr; 1318 } 1319 SourceRange getSourceRange() const { return SourceRange(LBracloc, RBracloc); } 1320 1321 static bool classof(const Stmt *T) { 1322 return T->getStmtClass() == ObjCMessageExprClass; 1323 } 1324 static bool classof(const ObjCMessageExpr *) { return true; } 1325 1326 // Iterators 1327 virtual child_iterator child_begin(); 1328 virtual child_iterator child_end(); 1329}; 1330 1331} // end namespace clang 1332 1333#endif 1334