Expr.h revision 7da8d94cb79f311c5b126483b8edfe5dc70d6c8f
1//===--- Expr.h - Classes for representing expressions ----------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// 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/AST/DeclObjC.h" 21#include "clang/Basic/IdentifierTable.h" 22#include "llvm/ADT/APSInt.h" 23#include "llvm/ADT/APFloat.h" 24 25namespace clang { 26 class IdentifierInfo; 27 class Selector; 28 class Decl; 29 class ASTContext; 30 31/// Expr - This represents one expression. Note that Expr's are subclasses of 32/// Stmt. This allows an expression to be transparently used any place a Stmt 33/// is required. 34/// 35class Expr : public Stmt { 36 QualType TR; 37protected: 38 Expr(StmtClass SC, QualType T) : Stmt(SC), TR(T) {} 39public: 40 QualType getType() const { return TR; } 41 void setType(QualType t) { TR = t; } 42 43 /// SourceLocation tokens are not useful in isolation - they are low level 44 /// value objects created/interpreted by SourceManager. We assume AST 45 /// clients will have a pointer to the respective SourceManager. 46 virtual SourceRange getSourceRange() const = 0; 47 48 /// getExprLoc - Return the preferred location for the arrow when diagnosing 49 /// a problem with a generic expression. 50 virtual SourceLocation getExprLoc() const { return getLocStart(); } 51 52 /// hasLocalSideEffect - Return true if this immediate expression has side 53 /// effects, not counting any sub-expressions. 54 bool hasLocalSideEffect() const; 55 56 /// isLvalue - C99 6.3.2.1: an lvalue is an expression with an object type or 57 /// incomplete type other than void. Nonarray expressions that can be lvalues: 58 /// - name, where name must be a variable 59 /// - e[i] 60 /// - (e), where e must be an lvalue 61 /// - e.name, where e must be an lvalue 62 /// - e->name 63 /// - *e, the type of e cannot be a function type 64 /// - string-constant 65 /// - reference type [C++ [expr]] 66 /// 67 enum isLvalueResult { 68 LV_Valid, 69 LV_NotObjectType, 70 LV_IncompleteVoidType, 71 LV_DuplicateVectorComponents, 72 LV_InvalidExpression 73 }; 74 isLvalueResult isLvalue() const; 75 76 /// isModifiableLvalue - C99 6.3.2.1: an lvalue that does not have array type, 77 /// does not have an incomplete type, does not have a const-qualified type, 78 /// and if it is a structure or union, does not have any member (including, 79 /// recursively, any member or element of all contained aggregates or unions) 80 /// with a const-qualified type. 81 enum isModifiableLvalueResult { 82 MLV_Valid, 83 MLV_NotObjectType, 84 MLV_IncompleteVoidType, 85 MLV_DuplicateVectorComponents, 86 MLV_InvalidExpression, 87 MLV_IncompleteType, 88 MLV_ConstQualified, 89 MLV_ArrayType 90 }; 91 isModifiableLvalueResult isModifiableLvalue() const; 92 93 bool isNullPointerConstant(ASTContext &Ctx) const; 94 95 /// isIntegerConstantExpr - Return true if this expression is a valid integer 96 /// constant expression, and, if so, return its value in Result. If not a 97 /// valid i-c-e, return false and fill in Loc (if specified) with the location 98 /// of the invalid expression. 99 bool isIntegerConstantExpr(llvm::APSInt &Result, ASTContext &Ctx, 100 SourceLocation *Loc = 0, 101 bool isEvaluated = true) const; 102 bool isIntegerConstantExpr(ASTContext &Ctx, SourceLocation *Loc = 0) const { 103 llvm::APSInt X(32); 104 return isIntegerConstantExpr(X, Ctx, Loc); 105 } 106 /// isConstantExpr - Return true if this expression is a valid constant expr. 107 bool isConstantExpr(ASTContext &Ctx, SourceLocation *Loc) const; 108 109 /// hasStaticStorage - Return true if this expression has static storage 110 /// duration. This means that the address of this expression is a link-time 111 /// constant. 112 bool hasStaticStorage() const; 113 114 /// IgnoreParens - Ignore parentheses. If this Expr is a ParenExpr, return 115 /// its subexpression. If that subexpression is also a ParenExpr, 116 /// then this method recursively returns its subexpression, and so forth. 117 /// Otherwise, the method returns the current Expr. 118 Expr* IgnoreParens(); 119 120 const Expr* IgnoreParens() const { 121 return const_cast<Expr*>(this)->IgnoreParens(); 122 } 123 124 static bool classof(const Stmt *T) { 125 return T->getStmtClass() >= firstExprConstant && 126 T->getStmtClass() <= lastExprConstant; 127 } 128 static bool classof(const Expr *) { return true; } 129 130 static inline Expr* Create(llvm::Deserializer& D) { 131 return cast<Expr>(Stmt::Create(D)); 132 } 133}; 134 135//===----------------------------------------------------------------------===// 136// Primary Expressions. 137//===----------------------------------------------------------------------===// 138 139/// DeclRefExpr - [C99 6.5.1p2] - A reference to a declared variable, function, 140/// enum, etc. 141class DeclRefExpr : public Expr { 142 ValueDecl *D; 143 SourceLocation Loc; 144public: 145 DeclRefExpr(ValueDecl *d, QualType t, SourceLocation l) : 146 Expr(DeclRefExprClass, t), D(d), Loc(l) {} 147 148 ValueDecl *getDecl() { return D; } 149 const ValueDecl *getDecl() const { return D; } 150 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 151 152 153 static bool classof(const Stmt *T) { 154 return T->getStmtClass() == DeclRefExprClass; 155 } 156 static bool classof(const DeclRefExpr *) { return true; } 157 158 // Iterators 159 virtual child_iterator child_begin(); 160 virtual child_iterator child_end(); 161 162 virtual void EmitImpl(llvm::Serializer& S) const; 163 static DeclRefExpr* CreateImpl(llvm::Deserializer& D); 164}; 165 166/// PreDefinedExpr - [C99 6.4.2.2] - A pre-defined identifier such as __func__. 167class PreDefinedExpr : public Expr { 168public: 169 enum IdentType { 170 Func, 171 Function, 172 PrettyFunction 173 }; 174 175private: 176 SourceLocation Loc; 177 IdentType Type; 178public: 179 PreDefinedExpr(SourceLocation l, QualType type, IdentType IT) 180 : Expr(PreDefinedExprClass, type), Loc(l), Type(IT) {} 181 182 IdentType getIdentType() const { return Type; } 183 184 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 185 186 static bool classof(const Stmt *T) { 187 return T->getStmtClass() == PreDefinedExprClass; 188 } 189 static bool classof(const PreDefinedExpr *) { return true; } 190 191 // Iterators 192 virtual child_iterator child_begin(); 193 virtual child_iterator child_end(); 194 195 virtual void EmitImpl(llvm::Serializer& S) const; 196 static PreDefinedExpr* CreateImpl(llvm::Deserializer& D); 197}; 198 199class IntegerLiteral : public Expr { 200 llvm::APInt Value; 201 SourceLocation Loc; 202public: 203 // type should be IntTy, LongTy, LongLongTy, UnsignedIntTy, UnsignedLongTy, 204 // or UnsignedLongLongTy 205 IntegerLiteral(const llvm::APInt &V, QualType type, SourceLocation l) 206 : Expr(IntegerLiteralClass, type), Value(V), Loc(l) { 207 assert(type->isIntegerType() && "Illegal type in IntegerLiteral"); 208 } 209 const llvm::APInt &getValue() const { return Value; } 210 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 211 212 static bool classof(const Stmt *T) { 213 return T->getStmtClass() == IntegerLiteralClass; 214 } 215 static bool classof(const IntegerLiteral *) { return true; } 216 217 // Iterators 218 virtual child_iterator child_begin(); 219 virtual child_iterator child_end(); 220 221 virtual void EmitImpl(llvm::Serializer& S) const; 222 static IntegerLiteral* CreateImpl(llvm::Deserializer& D); 223}; 224 225class CharacterLiteral : public Expr { 226 unsigned Value; 227 SourceLocation Loc; 228public: 229 // type should be IntTy 230 CharacterLiteral(unsigned value, QualType type, SourceLocation l) 231 : Expr(CharacterLiteralClass, type), Value(value), Loc(l) { 232 } 233 SourceLocation getLoc() const { return Loc; } 234 235 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 236 237 unsigned getValue() const { return Value; } 238 239 static bool classof(const Stmt *T) { 240 return T->getStmtClass() == CharacterLiteralClass; 241 } 242 static bool classof(const CharacterLiteral *) { return true; } 243 244 // Iterators 245 virtual child_iterator child_begin(); 246 virtual child_iterator child_end(); 247 248 virtual void EmitImpl(llvm::Serializer& S) const; 249 static CharacterLiteral* CreateImpl(llvm::Deserializer& D); 250}; 251 252class FloatingLiteral : public Expr { 253 llvm::APFloat Value; 254 bool IsExact : 1; 255 SourceLocation Loc; 256public: 257 FloatingLiteral(const llvm::APFloat &V, bool* isexact, 258 QualType Type, SourceLocation L) 259 : Expr(FloatingLiteralClass, Type), Value(V), IsExact(*isexact), Loc(L) {} 260 261 const llvm::APFloat &getValue() const { return Value; } 262 263 bool isExact() const { return IsExact; } 264 265 /// getValueAsDouble - This returns the value as an inaccurate double. Note 266 /// that this may cause loss of precision, but is useful for debugging dumps 267 /// etc. 268 double getValueAsDouble() const { 269 // FIXME: We need something for long double here. 270 if (cast<BuiltinType>(getType())->getKind() == BuiltinType::Float) 271 return Value.convertToFloat(); 272 else 273 return Value.convertToDouble(); 274 } 275 276 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 277 278 static bool classof(const Stmt *T) { 279 return T->getStmtClass() == FloatingLiteralClass; 280 } 281 static bool classof(const FloatingLiteral *) { return true; } 282 283 // Iterators 284 virtual child_iterator child_begin(); 285 virtual child_iterator child_end(); 286 287 virtual void EmitImpl(llvm::Serializer& S) const; 288 static FloatingLiteral* CreateImpl(llvm::Deserializer& D); 289}; 290 291/// ImaginaryLiteral - We support imaginary integer and floating point literals, 292/// like "1.0i". We represent these as a wrapper around FloatingLiteral and 293/// IntegerLiteral classes. Instances of this class always have a Complex type 294/// whose element type matches the subexpression. 295/// 296class ImaginaryLiteral : public Expr { 297 Expr *Val; 298public: 299 ImaginaryLiteral(Expr *val, QualType Ty) 300 : Expr(ImaginaryLiteralClass, Ty), Val(val) {} 301 302 const Expr *getSubExpr() const { return Val; } 303 Expr *getSubExpr() { return Val; } 304 305 virtual SourceRange getSourceRange() const { return Val->getSourceRange(); } 306 static bool classof(const Stmt *T) { 307 return T->getStmtClass() == ImaginaryLiteralClass; 308 } 309 static bool classof(const ImaginaryLiteral *) { return true; } 310 311 // Iterators 312 virtual child_iterator child_begin(); 313 virtual child_iterator child_end(); 314 315 virtual void EmitImpl(llvm::Serializer& S) const; 316 static ImaginaryLiteral* CreateImpl(llvm::Deserializer& D); 317}; 318 319/// StringLiteral - This represents a string literal expression, e.g. "foo" 320/// or L"bar" (wide strings). The actual string is returned by getStrData() 321/// is NOT null-terminated, and the length of the string is determined by 322/// calling getByteLength(). 323class StringLiteral : public Expr { 324 const char *StrData; 325 unsigned ByteLength; 326 bool IsWide; 327 // if the StringLiteral was composed using token pasting, both locations 328 // are needed. If not (the common case), firstTokLoc == lastTokLoc. 329 // FIXME: if space becomes an issue, we should create a sub-class. 330 SourceLocation firstTokLoc, lastTokLoc; 331public: 332 StringLiteral(const char *strData, unsigned byteLength, bool Wide, 333 QualType t, SourceLocation b, SourceLocation e); 334 virtual ~StringLiteral(); 335 336 const char *getStrData() const { return StrData; } 337 unsigned getByteLength() const { return ByteLength; } 338 bool isWide() const { return IsWide; } 339 340 virtual SourceRange getSourceRange() const { 341 return SourceRange(firstTokLoc,lastTokLoc); 342 } 343 static bool classof(const Stmt *T) { 344 return T->getStmtClass() == StringLiteralClass; 345 } 346 static bool classof(const StringLiteral *) { return true; } 347 348 // Iterators 349 virtual child_iterator child_begin(); 350 virtual child_iterator child_end(); 351 352 virtual void EmitImpl(llvm::Serializer& S) const; 353 static StringLiteral* CreateImpl(llvm::Deserializer& D); 354}; 355 356/// ParenExpr - This represents a parethesized expression, e.g. "(1)". This 357/// AST node is only formed if full location information is requested. 358class ParenExpr : public Expr { 359 SourceLocation L, R; 360 Expr *Val; 361public: 362 ParenExpr(SourceLocation l, SourceLocation r, Expr *val) 363 : Expr(ParenExprClass, val->getType()), L(l), R(r), Val(val) {} 364 365 const Expr *getSubExpr() const { return Val; } 366 Expr *getSubExpr() { return Val; } 367 SourceRange getSourceRange() const { return SourceRange(L, R); } 368 369 static bool classof(const Stmt *T) { 370 return T->getStmtClass() == ParenExprClass; 371 } 372 static bool classof(const ParenExpr *) { return true; } 373 374 // Iterators 375 virtual child_iterator child_begin(); 376 virtual child_iterator child_end(); 377 378 virtual void EmitImpl(llvm::Serializer& S) const; 379 static ParenExpr* CreateImpl(llvm::Deserializer& D); 380}; 381 382 383/// UnaryOperator - This represents the unary-expression's (except sizeof of 384/// types), the postinc/postdec operators from postfix-expression, and various 385/// extensions. 386/// 387/// Notes on various nodes: 388/// 389/// Real/Imag - These return the real/imag part of a complex operand. If 390/// applied to a non-complex value, the former returns its operand and the 391/// later returns zero in the type of the operand. 392/// 393/// __builtin_offsetof(type, a.b[10]) is represented as a unary operator whose 394/// subexpression is a compound literal with the various MemberExpr and 395/// ArraySubscriptExpr's applied to it. 396/// 397class UnaryOperator : public Expr { 398public: 399 // Note that additions to this should also update the StmtVisitor class. 400 enum Opcode { 401 PostInc, PostDec, // [C99 6.5.2.4] Postfix increment and decrement operators 402 PreInc, PreDec, // [C99 6.5.3.1] Prefix increment and decrement operators. 403 AddrOf, Deref, // [C99 6.5.3.2] Address and indirection operators. 404 Plus, Minus, // [C99 6.5.3.3] Unary arithmetic operators. 405 Not, LNot, // [C99 6.5.3.3] Unary arithmetic operators. 406 SizeOf, AlignOf, // [C99 6.5.3.4] Sizeof (expr, not type) operator. 407 Real, Imag, // "__real expr"/"__imag expr" Extension. 408 Extension, // __extension__ marker. 409 OffsetOf // __builtin_offsetof 410 }; 411private: 412 Expr *Val; 413 Opcode Opc; 414 SourceLocation Loc; 415public: 416 417 UnaryOperator(Expr *input, Opcode opc, QualType type, SourceLocation l) 418 : Expr(UnaryOperatorClass, type), Val(input), Opc(opc), Loc(l) {} 419 420 Opcode getOpcode() const { return Opc; } 421 Expr *getSubExpr() const { return Val; } 422 423 /// getOperatorLoc - Return the location of the operator. 424 SourceLocation getOperatorLoc() const { return Loc; } 425 426 /// isPostfix - Return true if this is a postfix operation, like x++. 427 static bool isPostfix(Opcode Op); 428 429 bool isPostfix() const { return isPostfix(Opc); } 430 bool isIncrementDecrementOp() const { return Opc>=PostInc && Opc<=PreDec; } 431 bool isSizeOfAlignOfOp() const { return Opc == SizeOf || Opc == AlignOf; } 432 static bool isArithmeticOp(Opcode Op) { return Op >= Plus && Op <= LNot; } 433 434 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 435 /// corresponds to, e.g. "sizeof" or "[pre]++" 436 static const char *getOpcodeStr(Opcode Op); 437 438 virtual SourceRange getSourceRange() const { 439 if (isPostfix()) 440 return SourceRange(Val->getLocStart(), Loc); 441 else 442 return SourceRange(Loc, Val->getLocEnd()); 443 } 444 virtual SourceLocation getExprLoc() const { return Loc; } 445 446 static bool classof(const Stmt *T) { 447 return T->getStmtClass() == UnaryOperatorClass; 448 } 449 static bool classof(const UnaryOperator *) { return true; } 450 451 // Iterators 452 virtual child_iterator child_begin(); 453 virtual child_iterator child_end(); 454 455 virtual void EmitImpl(llvm::Serializer& S) const; 456 static UnaryOperator* CreateImpl(llvm::Deserializer& D); 457}; 458 459/// SizeOfAlignOfTypeExpr - [C99 6.5.3.4] - This is only for sizeof/alignof of 460/// *types*. sizeof(expr) is handled by UnaryOperator. 461class SizeOfAlignOfTypeExpr : public Expr { 462 bool isSizeof; // true if sizeof, false if alignof. 463 QualType Ty; 464 SourceLocation OpLoc, RParenLoc; 465public: 466 SizeOfAlignOfTypeExpr(bool issizeof, QualType argType, QualType resultType, 467 SourceLocation op, SourceLocation rp) : 468 Expr(SizeOfAlignOfTypeExprClass, resultType), 469 isSizeof(issizeof), Ty(argType), OpLoc(op), RParenLoc(rp) {} 470 471 bool isSizeOf() const { return isSizeof; } 472 QualType getArgumentType() const { return Ty; } 473 474 SourceLocation getOperatorLoc() const { return OpLoc; } 475 SourceRange getSourceRange() const { return SourceRange(OpLoc, RParenLoc); } 476 477 static bool classof(const Stmt *T) { 478 return T->getStmtClass() == SizeOfAlignOfTypeExprClass; 479 } 480 static bool classof(const SizeOfAlignOfTypeExpr *) { return true; } 481 482 // Iterators 483 virtual child_iterator child_begin(); 484 virtual child_iterator child_end(); 485 486 virtual void EmitImpl(llvm::Serializer& S) const; 487 static SizeOfAlignOfTypeExpr* CreateImpl(llvm::Deserializer& D); 488}; 489 490//===----------------------------------------------------------------------===// 491// Postfix Operators. 492//===----------------------------------------------------------------------===// 493 494/// ArraySubscriptExpr - [C99 6.5.2.1] Array Subscripting. 495class ArraySubscriptExpr : public Expr { 496 enum { LHS, RHS, END_EXPR=2 }; 497 Expr* SubExprs[END_EXPR]; 498 SourceLocation RBracketLoc; 499public: 500 ArraySubscriptExpr(Expr *lhs, Expr *rhs, QualType t, 501 SourceLocation rbracketloc) 502 : Expr(ArraySubscriptExprClass, t), RBracketLoc(rbracketloc) { 503 SubExprs[LHS] = lhs; 504 SubExprs[RHS] = rhs; 505 } 506 507 /// An array access can be written A[4] or 4[A] (both are equivalent). 508 /// - getBase() and getIdx() always present the normalized view: A[4]. 509 /// In this case getBase() returns "A" and getIdx() returns "4". 510 /// - getLHS() and getRHS() present the syntactic view. e.g. for 511 /// 4[A] getLHS() returns "4". 512 /// Note: Because vector element access is also written A[4] we must 513 /// predicate the format conversion in getBase and getIdx only on the 514 /// the type of the RHS, as it is possible for the LHS to be a vector of 515 /// integer type 516 Expr *getLHS() { return SubExprs[LHS]; } 517 const Expr *getLHS() const { return SubExprs[LHS]; } 518 519 Expr *getRHS() { return SubExprs[RHS]; } 520 const Expr *getRHS() const { return SubExprs[RHS]; } 521 522 Expr *getBase() { 523 return (getRHS()->getType()->isIntegerType()) ? getLHS() : getRHS(); 524 } 525 526 const Expr *getBase() const { 527 return (getRHS()->getType()->isIntegerType()) ? getLHS() : getRHS(); 528 } 529 530 Expr *getIdx() { 531 return (getRHS()->getType()->isIntegerType()) ? getRHS() : getLHS(); 532 } 533 534 const Expr *getIdx() const { 535 return (getRHS()->getType()->isIntegerType()) ? getRHS() : getLHS(); 536 } 537 538 539 SourceRange getSourceRange() const { 540 return SourceRange(getLHS()->getLocStart(), RBracketLoc); 541 } 542 virtual SourceLocation getExprLoc() const { return RBracketLoc; } 543 544 static bool classof(const Stmt *T) { 545 return T->getStmtClass() == ArraySubscriptExprClass; 546 } 547 static bool classof(const ArraySubscriptExpr *) { return true; } 548 549 // Iterators 550 virtual child_iterator child_begin(); 551 virtual child_iterator child_end(); 552 553 virtual void EmitImpl(llvm::Serializer& S) const; 554 static ArraySubscriptExpr* CreateImpl(llvm::Deserializer& D); 555}; 556 557 558/// CallExpr - [C99 6.5.2.2] Function Calls. 559/// 560class CallExpr : public Expr { 561 enum { FN=0, ARGS_START=1 }; 562 Expr **SubExprs; 563 unsigned NumArgs; 564 SourceLocation RParenLoc; 565 566 // This version of the ctor is for deserialization. 567 CallExpr(Expr** subexprs, unsigned numargs, QualType t, 568 SourceLocation rparenloc) 569 : Expr(CallExprClass,t), SubExprs(subexprs), 570 NumArgs(numargs), RParenLoc(rparenloc) {} 571 572public: 573 CallExpr(Expr *fn, Expr **args, unsigned numargs, QualType t, 574 SourceLocation rparenloc); 575 ~CallExpr() { 576 delete [] SubExprs; 577 } 578 579 const Expr *getCallee() const { return SubExprs[FN]; } 580 Expr *getCallee() { return SubExprs[FN]; } 581 void setCallee(Expr *F) { SubExprs[FN] = F; } 582 583 /// getNumArgs - Return the number of actual arguments to this call. 584 /// 585 unsigned getNumArgs() const { return NumArgs; } 586 587 /// getArg - Return the specified argument. 588 Expr *getArg(unsigned Arg) { 589 assert(Arg < NumArgs && "Arg access out of range!"); 590 return SubExprs[Arg+ARGS_START]; 591 } 592 const Expr *getArg(unsigned Arg) const { 593 assert(Arg < NumArgs && "Arg access out of range!"); 594 return SubExprs[Arg+ARGS_START]; 595 } 596 /// setArg - Set the specified argument. 597 void setArg(unsigned Arg, Expr *ArgExpr) { 598 assert(Arg < NumArgs && "Arg access out of range!"); 599 SubExprs[Arg+ARGS_START] = ArgExpr; 600 } 601 602 /// setNumArgs - This changes the number of arguments present in this call. 603 /// Any orphaned expressions are deleted by this, and any new operands are set 604 /// to null. 605 void setNumArgs(unsigned NumArgs); 606 607 typedef Expr **arg_iterator; 608 typedef Expr * const *arg_const_iterator; 609 arg_iterator arg_begin() { return SubExprs+ARGS_START; } 610 arg_iterator arg_end() { return SubExprs+ARGS_START+getNumArgs(); } 611 arg_const_iterator arg_begin() const { return SubExprs+ARGS_START; } 612 arg_const_iterator arg_end() const { return SubExprs+ARGS_START+getNumArgs(); } 613 614 615 /// getNumCommas - Return the number of commas that must have been present in 616 /// this function call. 617 unsigned getNumCommas() const { return NumArgs ? NumArgs - 1 : 0; } 618 619 bool isBuiltinClassifyType(llvm::APSInt &Result) const; 620 621 SourceLocation getRParenLoc() const { return RParenLoc; } 622 SourceRange getSourceRange() const { 623 return SourceRange(getCallee()->getLocStart(), RParenLoc); 624 } 625 626 static bool classof(const Stmt *T) { 627 return T->getStmtClass() == CallExprClass; 628 } 629 static bool classof(const CallExpr *) { return true; } 630 631 // Iterators 632 virtual child_iterator child_begin(); 633 virtual child_iterator child_end(); 634 635 virtual void EmitImpl(llvm::Serializer& S) const; 636 static CallExpr* CreateImpl(llvm::Deserializer& D); 637}; 638 639/// MemberExpr - [C99 6.5.2.3] Structure and Union Members. 640/// 641class MemberExpr : public Expr { 642 Expr *Base; 643 FieldDecl *MemberDecl; 644 SourceLocation MemberLoc; 645 bool IsArrow; // True if this is "X->F", false if this is "X.F". 646public: 647 MemberExpr(Expr *base, bool isarrow, FieldDecl *memberdecl, SourceLocation l) 648 : Expr(MemberExprClass, memberdecl->getType()), 649 Base(base), MemberDecl(memberdecl), MemberLoc(l), IsArrow(isarrow) {} 650 651 Expr *getBase() const { return Base; } 652 FieldDecl *getMemberDecl() const { return MemberDecl; } 653 bool isArrow() const { return IsArrow; } 654 655 virtual SourceRange getSourceRange() const { 656 return SourceRange(getBase()->getLocStart(), MemberLoc); 657 } 658 virtual SourceLocation getExprLoc() const { return MemberLoc; } 659 660 static bool classof(const Stmt *T) { 661 return T->getStmtClass() == MemberExprClass; 662 } 663 static bool classof(const MemberExpr *) { return true; } 664 665 // Iterators 666 virtual child_iterator child_begin(); 667 virtual child_iterator child_end(); 668 669 virtual void EmitImpl(llvm::Serializer& S) const; 670 static MemberExpr* CreateImpl(llvm::Deserializer& D); 671}; 672 673/// OCUVectorElementExpr - This represents access to specific elements of a 674/// vector, and may occur on the left hand side or right hand side. For example 675/// the following is legal: "V.xy = V.zw" if V is a 4 element ocu vector. 676/// 677class OCUVectorElementExpr : public Expr { 678 Expr *Base; 679 IdentifierInfo &Accessor; 680 SourceLocation AccessorLoc; 681public: 682 enum ElementType { 683 Point, // xywz 684 Color, // rgba 685 Texture // stpq 686 }; 687 OCUVectorElementExpr(QualType ty, Expr *base, IdentifierInfo &accessor, 688 SourceLocation loc) 689 : Expr(OCUVectorElementExprClass, ty), 690 Base(base), Accessor(accessor), AccessorLoc(loc) {} 691 692 const Expr *getBase() const { return Base; } 693 Expr *getBase() { return Base; } 694 695 IdentifierInfo &getAccessor() const { return Accessor; } 696 697 /// getNumElements - Get the number of components being selected. 698 unsigned getNumElements() const; 699 700 /// getElementType - Determine whether the components of this access are 701 /// "point" "color" or "texture" elements. 702 ElementType getElementType() const; 703 704 /// containsDuplicateElements - Return true if any element access is 705 /// repeated. 706 bool containsDuplicateElements() const; 707 708 /// getEncodedElementAccess - Encode the elements accessed into a bit vector. 709 /// The encoding currently uses 2-bit bitfields, but clients should use the 710 /// accessors below to access them. 711 /// 712 unsigned getEncodedElementAccess() const; 713 714 /// getAccessedFieldNo - Given an encoded value and a result number, return 715 /// the input field number being accessed. 716 static unsigned getAccessedFieldNo(unsigned Idx, unsigned EncodedVal) { 717 return (EncodedVal >> (Idx*2)) & 3; 718 } 719 720 virtual SourceRange getSourceRange() const { 721 return SourceRange(getBase()->getLocStart(), AccessorLoc); 722 } 723 static bool classof(const Stmt *T) { 724 return T->getStmtClass() == OCUVectorElementExprClass; 725 } 726 static bool classof(const OCUVectorElementExpr *) { return true; } 727 728 // Iterators 729 virtual child_iterator child_begin(); 730 virtual child_iterator child_end(); 731}; 732 733/// CompoundLiteralExpr - [C99 6.5.2.5] 734/// 735class CompoundLiteralExpr : public Expr { 736 /// LParenLoc - If non-null, this is the location of the left paren in a 737 /// compound literal like "(int){4}". This can be null if this is a 738 /// synthesized compound expression. 739 SourceLocation LParenLoc; 740 Expr *Init; 741 bool FileScope; 742public: 743 CompoundLiteralExpr(SourceLocation lparenloc, QualType ty, Expr *init, bool fileScope) : 744 Expr(CompoundLiteralExprClass, ty), LParenLoc(lparenloc), Init(init), FileScope(fileScope) {} 745 746 const Expr *getInitializer() const { return Init; } 747 Expr *getInitializer() { return Init; } 748 749 bool isFileScope() const { return FileScope; } 750 751 SourceLocation getLParenLoc() const { return LParenLoc; } 752 753 virtual SourceRange getSourceRange() const { 754 // FIXME: Init should never be null. 755 if (!Init) 756 return SourceRange(); 757 if (LParenLoc.isInvalid()) 758 return Init->getSourceRange(); 759 return SourceRange(LParenLoc, Init->getLocEnd()); 760 } 761 762 static bool classof(const Stmt *T) { 763 return T->getStmtClass() == CompoundLiteralExprClass; 764 } 765 static bool classof(const CompoundLiteralExpr *) { return true; } 766 767 // Iterators 768 virtual child_iterator child_begin(); 769 virtual child_iterator child_end(); 770 771 virtual void EmitImpl(llvm::Serializer& S) const; 772 static CompoundLiteralExpr* CreateImpl(llvm::Deserializer& D); 773}; 774 775/// ImplicitCastExpr - Allows us to explicitly represent implicit type 776/// conversions. For example: converting T[]->T*, void f()->void (*f)(), 777/// float->double, short->int, etc. 778/// 779class ImplicitCastExpr : public Expr { 780 Expr *Op; 781public: 782 ImplicitCastExpr(QualType ty, Expr *op) : 783 Expr(ImplicitCastExprClass, ty), Op(op) {} 784 785 Expr *getSubExpr() { return Op; } 786 const Expr *getSubExpr() const { return Op; } 787 788 virtual SourceRange getSourceRange() const { return Op->getSourceRange(); } 789 790 static bool classof(const Stmt *T) { 791 return T->getStmtClass() == ImplicitCastExprClass; 792 } 793 static bool classof(const ImplicitCastExpr *) { return true; } 794 795 // Iterators 796 virtual child_iterator child_begin(); 797 virtual child_iterator child_end(); 798 799 virtual void EmitImpl(llvm::Serializer& S) const; 800 static ImplicitCastExpr* CreateImpl(llvm::Deserializer& D); 801}; 802 803/// CastExpr - [C99 6.5.4] Cast Operators. 804/// 805class CastExpr : public Expr { 806 Expr *Op; 807 SourceLocation Loc; // the location of the left paren 808public: 809 CastExpr(QualType ty, Expr *op, SourceLocation l) : 810 Expr(CastExprClass, ty), Op(op), Loc(l) {} 811 812 SourceLocation getLParenLoc() const { return Loc; } 813 814 Expr *getSubExpr() const { return Op; } 815 816 virtual SourceRange getSourceRange() const { 817 return SourceRange(Loc, getSubExpr()->getSourceRange().getEnd()); 818 } 819 static bool classof(const Stmt *T) { 820 return T->getStmtClass() == CastExprClass; 821 } 822 static bool classof(const CastExpr *) { return true; } 823 824 // Iterators 825 virtual child_iterator child_begin(); 826 virtual child_iterator child_end(); 827 828 virtual void EmitImpl(llvm::Serializer& S) const; 829 static CastExpr* CreateImpl(llvm::Deserializer& D); 830}; 831 832class BinaryOperator : public Expr { 833public: 834 enum Opcode { 835 // Operators listed in order of precedence. 836 // Note that additions to this should also update the StmtVisitor class. 837 Mul, Div, Rem, // [C99 6.5.5] Multiplicative operators. 838 Add, Sub, // [C99 6.5.6] Additive operators. 839 Shl, Shr, // [C99 6.5.7] Bitwise shift operators. 840 LT, GT, LE, GE, // [C99 6.5.8] Relational operators. 841 EQ, NE, // [C99 6.5.9] Equality operators. 842 And, // [C99 6.5.10] Bitwise AND operator. 843 Xor, // [C99 6.5.11] Bitwise XOR operator. 844 Or, // [C99 6.5.12] Bitwise OR operator. 845 LAnd, // [C99 6.5.13] Logical AND operator. 846 LOr, // [C99 6.5.14] Logical OR operator. 847 Assign, MulAssign,// [C99 6.5.16] Assignment operators. 848 DivAssign, RemAssign, 849 AddAssign, SubAssign, 850 ShlAssign, ShrAssign, 851 AndAssign, XorAssign, 852 OrAssign, 853 Comma // [C99 6.5.17] Comma operator. 854 }; 855private: 856 enum { LHS, RHS, END_EXPR }; 857 Expr* SubExprs[END_EXPR]; 858 Opcode Opc; 859 SourceLocation OpLoc; 860public: 861 862 BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, 863 SourceLocation opLoc) 864 : Expr(BinaryOperatorClass, ResTy), Opc(opc), OpLoc(opLoc) { 865 SubExprs[LHS] = lhs; 866 SubExprs[RHS] = rhs; 867 assert(!isCompoundAssignmentOp() && 868 "Use ArithAssignBinaryOperator for compound assignments"); 869 } 870 871 SourceLocation getOperatorLoc() const { return OpLoc; } 872 Opcode getOpcode() const { return Opc; } 873 Expr *getLHS() const { return SubExprs[LHS]; } 874 Expr *getRHS() const { return SubExprs[RHS]; } 875 virtual SourceRange getSourceRange() const { 876 return SourceRange(getLHS()->getLocStart(), getRHS()->getLocEnd()); 877 } 878 879 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 880 /// corresponds to, e.g. "<<=". 881 static const char *getOpcodeStr(Opcode Op); 882 883 /// predicates to categorize the respective opcodes. 884 bool isMultiplicativeOp() const { return Opc >= Mul && Opc <= Rem; } 885 bool isAdditiveOp() const { return Opc == Add || Opc == Sub; } 886 bool isShiftOp() const { return Opc == Shl || Opc == Shr; } 887 bool isBitwiseOp() const { return Opc >= And && Opc <= Or; } 888 bool isRelationalOp() const { return Opc >= LT && Opc <= GE; } 889 bool isEqualityOp() const { return Opc == EQ || Opc == NE; } 890 bool isLogicalOp() const { return Opc == LAnd || Opc == LOr; } 891 bool isAssignmentOp() const { return Opc >= Assign && Opc <= OrAssign; } 892 bool isCompoundAssignmentOp() const { return Opc > Assign && Opc <= OrAssign;} 893 bool isShiftAssignOp() const { return Opc == ShlAssign || Opc == ShrAssign; } 894 895 static bool classof(const Stmt *S) { 896 return S->getStmtClass() == BinaryOperatorClass || 897 S->getStmtClass() == CompoundAssignOperatorClass; 898 } 899 static bool classof(const BinaryOperator *) { return true; } 900 901 // Iterators 902 virtual child_iterator child_begin(); 903 virtual child_iterator child_end(); 904 905 virtual void EmitImpl(llvm::Serializer& S) const; 906 static BinaryOperator* CreateImpl(llvm::Deserializer& D); 907 908protected: 909 BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, 910 SourceLocation oploc, bool dead) 911 : Expr(CompoundAssignOperatorClass, ResTy), Opc(opc), OpLoc(oploc) { 912 SubExprs[LHS] = lhs; 913 SubExprs[RHS] = rhs; 914 } 915}; 916 917/// CompoundAssignOperator - For compound assignments (e.g. +=), we keep 918/// track of the type the operation is performed in. Due to the semantics of 919/// these operators, the operands are promoted, the aritmetic performed, an 920/// implicit conversion back to the result type done, then the assignment takes 921/// place. This captures the intermediate type which the computation is done 922/// in. 923class CompoundAssignOperator : public BinaryOperator { 924 QualType ComputationType; 925public: 926 CompoundAssignOperator(Expr *lhs, Expr *rhs, Opcode opc, 927 QualType ResType, QualType CompType, 928 SourceLocation OpLoc) 929 : BinaryOperator(lhs, rhs, opc, ResType, OpLoc, true), 930 ComputationType(CompType) { 931 assert(isCompoundAssignmentOp() && 932 "Only should be used for compound assignments"); 933 } 934 935 QualType getComputationType() const { return ComputationType; } 936 937 static bool classof(const CompoundAssignOperator *) { return true; } 938 static bool classof(const Stmt *S) { 939 return S->getStmtClass() == CompoundAssignOperatorClass; 940 } 941 942 virtual void EmitImpl(llvm::Serializer& S) const; 943 static CompoundAssignOperator* CreateImpl(llvm::Deserializer& D); 944}; 945 946/// ConditionalOperator - The ?: operator. Note that LHS may be null when the 947/// GNU "missing LHS" extension is in use. 948/// 949class ConditionalOperator : public Expr { 950 enum { COND, LHS, RHS, END_EXPR }; 951 Expr* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. 952public: 953 ConditionalOperator(Expr *cond, Expr *lhs, Expr *rhs, QualType t) 954 : Expr(ConditionalOperatorClass, t) { 955 SubExprs[COND] = cond; 956 SubExprs[LHS] = lhs; 957 SubExprs[RHS] = rhs; 958 } 959 960 // getCond - Return the expression representing the condition for 961 // the ?: operator. 962 Expr *getCond() const { return SubExprs[COND]; } 963 964 // getTrueExpr - Return the subexpression representing the value of the ?: 965 // expression if the condition evaluates to true. In most cases this value 966 // will be the same as getLHS() except a GCC extension allows the left 967 // subexpression to be omitted, and instead of the condition be returned. 968 // e.g: x ?: y is shorthand for x ? x : y, except that the expression "x" 969 // is only evaluated once. 970 Expr *getTrueExpr() const { 971 return SubExprs[LHS] ? SubExprs[COND] : SubExprs[LHS]; 972 } 973 974 // getTrueExpr - Return the subexpression representing the value of the ?: 975 // expression if the condition evaluates to false. This is the same as getRHS. 976 Expr *getFalseExpr() const { return SubExprs[RHS]; } 977 978 Expr *getLHS() const { return SubExprs[LHS]; } 979 Expr *getRHS() const { return SubExprs[RHS]; } 980 981 virtual SourceRange getSourceRange() const { 982 return SourceRange(getCond()->getLocStart(), getRHS()->getLocEnd()); 983 } 984 static bool classof(const Stmt *T) { 985 return T->getStmtClass() == ConditionalOperatorClass; 986 } 987 static bool classof(const ConditionalOperator *) { return true; } 988 989 // Iterators 990 virtual child_iterator child_begin(); 991 virtual child_iterator child_end(); 992 993 virtual void EmitImpl(llvm::Serializer& S) const; 994 static ConditionalOperator* CreateImpl(llvm::Deserializer& D); 995}; 996 997/// AddrLabelExpr - The GNU address of label extension, representing &&label. 998class AddrLabelExpr : public Expr { 999 SourceLocation AmpAmpLoc, LabelLoc; 1000 LabelStmt *Label; 1001public: 1002 AddrLabelExpr(SourceLocation AALoc, SourceLocation LLoc, LabelStmt *L, 1003 QualType t) 1004 : Expr(AddrLabelExprClass, t), AmpAmpLoc(AALoc), LabelLoc(LLoc), Label(L) {} 1005 1006 virtual SourceRange getSourceRange() const { 1007 return SourceRange(AmpAmpLoc, LabelLoc); 1008 } 1009 1010 LabelStmt *getLabel() const { return Label; } 1011 1012 static bool classof(const Stmt *T) { 1013 return T->getStmtClass() == AddrLabelExprClass; 1014 } 1015 static bool classof(const AddrLabelExpr *) { return true; } 1016 1017 // Iterators 1018 virtual child_iterator child_begin(); 1019 virtual child_iterator child_end(); 1020 1021 virtual void EmitImpl(llvm::Serializer& S) const; 1022 static AddrLabelExpr* CreateImpl(llvm::Deserializer& D); 1023}; 1024 1025/// StmtExpr - This is the GNU Statement Expression extension: ({int X=4; X;}). 1026/// The StmtExpr contains a single CompoundStmt node, which it evaluates and 1027/// takes the value of the last subexpression. 1028class StmtExpr : public Expr { 1029 CompoundStmt *SubStmt; 1030 SourceLocation LParenLoc, RParenLoc; 1031public: 1032 StmtExpr(CompoundStmt *substmt, QualType T, 1033 SourceLocation lp, SourceLocation rp) : 1034 Expr(StmtExprClass, T), SubStmt(substmt), LParenLoc(lp), RParenLoc(rp) { } 1035 1036 CompoundStmt *getSubStmt() { return SubStmt; } 1037 const CompoundStmt *getSubStmt() const { return SubStmt; } 1038 1039 virtual SourceRange getSourceRange() const { 1040 return SourceRange(LParenLoc, RParenLoc); 1041 } 1042 1043 static bool classof(const Stmt *T) { 1044 return T->getStmtClass() == StmtExprClass; 1045 } 1046 static bool classof(const StmtExpr *) { return true; } 1047 1048 // Iterators 1049 virtual child_iterator child_begin(); 1050 virtual child_iterator child_end(); 1051 1052 virtual void EmitImpl(llvm::Serializer& S) const; 1053 static StmtExpr* CreateImpl(llvm::Deserializer& D); 1054}; 1055 1056/// TypesCompatibleExpr - GNU builtin-in function __builtin_type_compatible_p. 1057/// This AST node represents a function that returns 1 if two *types* (not 1058/// expressions) are compatible. The result of this built-in function can be 1059/// used in integer constant expressions. 1060class TypesCompatibleExpr : public Expr { 1061 QualType Type1; 1062 QualType Type2; 1063 SourceLocation BuiltinLoc, RParenLoc; 1064public: 1065 TypesCompatibleExpr(QualType ReturnType, SourceLocation BLoc, 1066 QualType t1, QualType t2, SourceLocation RP) : 1067 Expr(TypesCompatibleExprClass, ReturnType), Type1(t1), Type2(t2), 1068 BuiltinLoc(BLoc), RParenLoc(RP) {} 1069 1070 QualType getArgType1() const { return Type1; } 1071 QualType getArgType2() const { return Type2; } 1072 1073 virtual SourceRange getSourceRange() const { 1074 return SourceRange(BuiltinLoc, RParenLoc); 1075 } 1076 static bool classof(const Stmt *T) { 1077 return T->getStmtClass() == TypesCompatibleExprClass; 1078 } 1079 static bool classof(const TypesCompatibleExpr *) { return true; } 1080 1081 // Iterators 1082 virtual child_iterator child_begin(); 1083 virtual child_iterator child_end(); 1084}; 1085 1086/// ChooseExpr - GNU builtin-in function __builtin_choose_expr. 1087/// This AST node is similar to the conditional operator (?:) in C, with 1088/// the following exceptions: 1089/// - the test expression much be a constant expression. 1090/// - the expression returned has it's type unaltered by promotion rules. 1091/// - does not evaluate the expression that was not chosen. 1092class ChooseExpr : public Expr { 1093 enum { COND, LHS, RHS, END_EXPR }; 1094 Expr* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. 1095 SourceLocation BuiltinLoc, RParenLoc; 1096public: 1097 ChooseExpr(SourceLocation BLoc, Expr *cond, Expr *lhs, Expr *rhs, QualType t, 1098 SourceLocation RP) 1099 : Expr(ChooseExprClass, t), 1100 BuiltinLoc(BLoc), RParenLoc(RP) { 1101 SubExprs[COND] = cond; 1102 SubExprs[LHS] = lhs; 1103 SubExprs[RHS] = rhs; 1104 } 1105 1106 /// isConditionTrue - Return true if the condition is true. This is always 1107 /// statically knowable for a well-formed choosexpr. 1108 bool isConditionTrue(ASTContext &C) const; 1109 1110 Expr *getCond() const { return SubExprs[COND]; } 1111 Expr *getLHS() const { return SubExprs[LHS]; } 1112 Expr *getRHS() const { return SubExprs[RHS]; } 1113 1114 virtual SourceRange getSourceRange() const { 1115 return SourceRange(BuiltinLoc, RParenLoc); 1116 } 1117 static bool classof(const Stmt *T) { 1118 return T->getStmtClass() == ChooseExprClass; 1119 } 1120 static bool classof(const ChooseExpr *) { return true; } 1121 1122 // Iterators 1123 virtual child_iterator child_begin(); 1124 virtual child_iterator child_end(); 1125}; 1126 1127/// OverloadExpr - Clang builtin-in function __builtin_overload. 1128/// This AST node provides a way to overload functions in C 1129/// i.e. float Z = __builtin_overload(2, X, Y, modf, mod, modl); 1130/// would pick whichever of the functions modf, mod, and modl that took two 1131/// arguments of the same type as X and Y. 1132class OverloadExpr : public Expr { 1133 Expr **SubExprs; 1134 unsigned NumArgs; 1135 unsigned FnIndex; 1136 SourceLocation BuiltinLoc; 1137 SourceLocation RParenLoc; 1138public: 1139 OverloadExpr(Expr **args, unsigned narg, unsigned idx, QualType t, 1140 SourceLocation bloc, SourceLocation rploc) 1141 : Expr(OverloadExprClass, t), NumArgs(narg), FnIndex(idx), BuiltinLoc(bloc), 1142 RParenLoc(rploc) { 1143 SubExprs = new Expr*[narg]; 1144 for (unsigned i = 0; i != narg; ++i) 1145 SubExprs[i] = args[i]; 1146 } 1147 ~OverloadExpr() { 1148 delete [] SubExprs; 1149 } 1150 1151 typedef Expr * const *arg_const_iterator; 1152 arg_const_iterator arg_begin() const { return SubExprs+1; } 1153 1154 /// getNumArgs - Return the number of actual arguments to this call. 1155 /// 1156 unsigned getNumArgs() const { return NumArgs; } 1157 1158 /// getArg - Return the specified argument. 1159 Expr *getArg(unsigned Arg) { 1160 assert(Arg < NumArgs && "Arg access out of range!"); 1161 return SubExprs[Arg]; 1162 } 1163 Expr *getFn() { return SubExprs[FnIndex]; } 1164 1165 virtual SourceRange getSourceRange() const { 1166 return SourceRange(BuiltinLoc, RParenLoc); 1167 } 1168 static bool classof(const Stmt *T) { 1169 return T->getStmtClass() == OverloadExprClass; 1170 } 1171 static bool classof(const OverloadExpr *) { return true; } 1172 1173 // Iterators 1174 virtual child_iterator child_begin(); 1175 virtual child_iterator child_end(); 1176}; 1177 1178/// VAArgExpr, used for the builtin function __builtin_va_start. 1179class VAArgExpr : public Expr { 1180 Expr *Val; 1181 SourceLocation BuiltinLoc, RParenLoc; 1182public: 1183 VAArgExpr(SourceLocation BLoc, Expr* e, QualType t, SourceLocation RPLoc) 1184 : Expr(VAArgExprClass, t), 1185 Val(e), 1186 BuiltinLoc(BLoc), 1187 RParenLoc(RPLoc) { } 1188 1189 const Expr *getSubExpr() const { return Val; } 1190 Expr *getSubExpr() { return Val; } 1191 virtual SourceRange getSourceRange() const { 1192 return SourceRange(BuiltinLoc, RParenLoc); 1193 } 1194 static bool classof(const Stmt *T) { 1195 return T->getStmtClass() == VAArgExprClass; 1196 } 1197 static bool classof(const VAArgExpr *) { return true; } 1198 1199 // Iterators 1200 virtual child_iterator child_begin(); 1201 virtual child_iterator child_end(); 1202}; 1203 1204/// InitListExpr, used for struct and array initializers. 1205class InitListExpr : public Expr { 1206 Expr **InitExprs; 1207 unsigned NumInits; 1208 SourceLocation LBraceLoc, RBraceLoc; 1209public: 1210 InitListExpr(SourceLocation lbraceloc, Expr **initexprs, unsigned numinits, 1211 SourceLocation rbraceloc); 1212 ~InitListExpr() { 1213 delete [] InitExprs; 1214 } 1215 1216 unsigned getNumInits() const { return NumInits; } 1217 1218 const Expr* getInit(unsigned Init) const { 1219 assert(Init < NumInits && "Initializer access out of range!"); 1220 return InitExprs[Init]; 1221 } 1222 1223 Expr* getInit(unsigned Init) { 1224 assert(Init < NumInits && "Initializer access out of range!"); 1225 return InitExprs[Init]; 1226 } 1227 1228 void setInit(unsigned Init, Expr *expr) { 1229 assert(Init < NumInits && "Initializer access out of range!"); 1230 InitExprs[Init] = expr; 1231 } 1232 1233 virtual SourceRange getSourceRange() const { 1234 return SourceRange(LBraceLoc, RBraceLoc); 1235 } 1236 static bool classof(const Stmt *T) { 1237 return T->getStmtClass() == InitListExprClass; 1238 } 1239 static bool classof(const InitListExpr *) { return true; } 1240 1241 // Iterators 1242 virtual child_iterator child_begin(); 1243 virtual child_iterator child_end(); 1244 1245 virtual void EmitImpl(llvm::Serializer& S) const; 1246 static InitListExpr* CreateImpl(llvm::Deserializer& D); 1247 1248private: 1249 // Used by serializer. 1250 InitListExpr() : Expr(InitListExprClass, QualType()), 1251 InitExprs(NULL), NumInits(0) {} 1252}; 1253 1254/// ObjCStringLiteral, used for Objective-C string literals 1255/// i.e. @"foo". 1256class ObjCStringLiteral : public Expr { 1257 StringLiteral *String; 1258 SourceLocation AtLoc; 1259public: 1260 ObjCStringLiteral(StringLiteral *SL, QualType T, SourceLocation L) 1261 : Expr(ObjCStringLiteralClass, T), String(SL), AtLoc(L) {} 1262 1263 StringLiteral* getString() { return String; } 1264 1265 const StringLiteral* getString() const { return String; } 1266 1267 SourceLocation getAtLoc() const { return AtLoc; } 1268 1269 virtual SourceRange getSourceRange() const { 1270 return SourceRange(AtLoc, String->getLocEnd()); 1271 } 1272 1273 static bool classof(const Stmt *T) { 1274 return T->getStmtClass() == ObjCStringLiteralClass; 1275 } 1276 static bool classof(const ObjCStringLiteral *) { return true; } 1277 1278 // Iterators 1279 virtual child_iterator child_begin(); 1280 virtual child_iterator child_end(); 1281 1282 virtual void EmitImpl(llvm::Serializer& S) const; 1283 static ObjCStringLiteral* CreateImpl(llvm::Deserializer& D); 1284}; 1285 1286/// ObjCEncodeExpr, used for @encode in Objective-C. 1287class ObjCEncodeExpr : public Expr { 1288 QualType EncType; 1289 SourceLocation AtLoc, RParenLoc; 1290public: 1291 ObjCEncodeExpr(QualType T, QualType ET, 1292 SourceLocation at, SourceLocation rp) 1293 : Expr(ObjCEncodeExprClass, T), EncType(ET), AtLoc(at), RParenLoc(rp) {} 1294 1295 SourceLocation getAtLoc() const { return AtLoc; } 1296 SourceLocation getRParenLoc() const { return RParenLoc; } 1297 1298 SourceRange getSourceRange() const { return SourceRange(AtLoc, RParenLoc); } 1299 1300 QualType getEncodedType() const { return EncType; } 1301 1302 static bool classof(const Stmt *T) { 1303 return T->getStmtClass() == ObjCEncodeExprClass; 1304 } 1305 static bool classof(const ObjCEncodeExpr *) { return true; } 1306 1307 // Iterators 1308 virtual child_iterator child_begin(); 1309 virtual child_iterator child_end(); 1310 1311 virtual void EmitImpl(llvm::Serializer& S) const; 1312 static ObjCEncodeExpr* CreateImpl(llvm::Deserializer& D); 1313}; 1314 1315/// ObjCSelectorExpr used for @selector in Objective-C. 1316class ObjCSelectorExpr : public Expr { 1317 Selector SelName; 1318 SourceLocation AtLoc, RParenLoc; 1319public: 1320 ObjCSelectorExpr(QualType T, Selector selInfo, 1321 SourceLocation at, SourceLocation rp) 1322 : Expr(ObjCSelectorExprClass, T), SelName(selInfo), 1323 AtLoc(at), RParenLoc(rp) {} 1324 1325 const Selector &getSelector() const { return SelName; } 1326 Selector &getSelector() { return SelName; } 1327 1328 SourceLocation getAtLoc() const { return AtLoc; } 1329 SourceLocation getRParenLoc() const { return RParenLoc; } 1330 SourceRange getSourceRange() const { return SourceRange(AtLoc, RParenLoc); } 1331 1332 /// getNumArgs - Return the number of actual arguments to this call. 1333 unsigned getNumArgs() const { return SelName.getNumArgs(); } 1334 1335 static bool classof(const Stmt *T) { 1336 return T->getStmtClass() == ObjCSelectorExprClass; 1337 } 1338 static bool classof(const ObjCSelectorExpr *) { return true; } 1339 1340 // Iterators 1341 virtual child_iterator child_begin(); 1342 virtual child_iterator child_end(); 1343 1344 virtual void EmitImpl(llvm::Serializer& S) const; 1345 static ObjCSelectorExpr* CreateImpl(llvm::Deserializer& D); 1346}; 1347 1348/// ObjCProtocolExpr used for protocol in Objective-C. 1349class ObjCProtocolExpr : public Expr { 1350 ObjCProtocolDecl *Protocol; 1351 SourceLocation AtLoc, RParenLoc; 1352public: 1353 ObjCProtocolExpr(QualType T, ObjCProtocolDecl *protocol, 1354 SourceLocation at, SourceLocation rp) 1355 : Expr(ObjCProtocolExprClass, T), Protocol(protocol), 1356 AtLoc(at), RParenLoc(rp) {} 1357 1358 ObjCProtocolDecl *getProtocol() const { return Protocol; } 1359 1360 SourceLocation getAtLoc() const { return AtLoc; } 1361 SourceLocation getRParenLoc() const { return RParenLoc; } 1362 SourceRange getSourceRange() const { return SourceRange(AtLoc, RParenLoc); } 1363 1364 static bool classof(const Stmt *T) { 1365 return T->getStmtClass() == ObjCProtocolExprClass; 1366 } 1367 static bool classof(const ObjCProtocolExpr *) { return true; } 1368 1369 // Iterators 1370 virtual child_iterator child_begin(); 1371 virtual child_iterator child_end(); 1372}; 1373 1374/// ObjCIvarRefExpr - A reference to an ObjC instance variable. 1375class ObjCIvarRefExpr : public Expr { 1376 class ObjCIvarDecl *D; 1377 SourceLocation Loc; 1378 Expr *Base; 1379 bool IsArrow:1; // True if this is "X->F", false if this is "X.F". 1380 bool IsFreeIvar:1; // True if ivar reference has no base (self assumed). 1381 1382public: 1383 ObjCIvarRefExpr(ObjCIvarDecl *d, QualType t, SourceLocation l, Expr *base=0, 1384 bool arrow = false, bool freeIvar = false) : 1385 Expr(ObjCIvarRefExprClass, t), D(d), Loc(l), Base(base), IsArrow(arrow), 1386 IsFreeIvar(freeIvar) {} 1387 1388 ObjCIvarDecl *getDecl() { return D; } 1389 const ObjCIvarDecl *getDecl() const { return D; } 1390 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 1391 Expr *const getBase() const { return Base; } 1392 void setBase(Expr * base) { Base = base; } 1393 const bool isArrow() const { return IsArrow; } 1394 const bool isFreeIvar() const { return IsFreeIvar; } 1395 1396 SourceLocation getLocation() const { return Loc; } 1397 1398 static bool classof(const Stmt *T) { 1399 return T->getStmtClass() == ObjCIvarRefExprClass; 1400 } 1401 static bool classof(const ObjCIvarRefExpr *) { return true; } 1402 1403 // Iterators 1404 virtual child_iterator child_begin(); 1405 virtual child_iterator child_end(); 1406 1407 virtual void EmitImpl(llvm::Serializer& S) const; 1408 static ObjCIvarRefExpr* CreateImpl(llvm::Deserializer& D); 1409}; 1410 1411class ObjCMessageExpr : public Expr { 1412 enum { RECEIVER=0, ARGS_START=1 }; 1413 1414 Expr **SubExprs; 1415 1416 unsigned NumArgs; 1417 1418 // A unigue name for this message. 1419 Selector SelName; 1420 1421 // A method prototype for this message (optional). 1422 // FIXME: Since method decls contain the selector, and most messages have a 1423 // prototype, consider devising a scheme for unifying SelName/MethodProto. 1424 ObjCMethodDecl *MethodProto; 1425 1426 IdentifierInfo *ClassName; // optional - 0 for instance messages. 1427 1428 SourceLocation LBracloc, RBracloc; 1429public: 1430 // constructor for class messages. 1431 // FIXME: clsName should be typed to ObjCInterfaceType 1432 ObjCMessageExpr(IdentifierInfo *clsName, Selector selInfo, 1433 QualType retType, ObjCMethodDecl *methDecl, 1434 SourceLocation LBrac, SourceLocation RBrac, 1435 Expr **ArgExprs, unsigned NumArgs); 1436 // constructor for instance messages. 1437 ObjCMessageExpr(Expr *receiver, Selector selInfo, 1438 QualType retType, ObjCMethodDecl *methDecl, 1439 SourceLocation LBrac, SourceLocation RBrac, 1440 Expr **ArgExprs, unsigned NumArgs); 1441 ~ObjCMessageExpr() { 1442 delete [] SubExprs; 1443 } 1444 1445 const Expr *getReceiver() const { return SubExprs[RECEIVER]; } 1446 Expr *getReceiver() { return SubExprs[RECEIVER]; } 1447 1448 const Selector &getSelector() const { return SelName; } 1449 Selector &getSelector() { return SelName; } 1450 1451 const ObjCMethodDecl *getMethodDecl() const { return MethodProto; } 1452 ObjCMethodDecl *getMethodDecl() { return MethodProto; } 1453 1454 const IdentifierInfo *getClassName() const { return ClassName; } 1455 IdentifierInfo *getClassName() { return ClassName; } 1456 1457 /// getNumArgs - Return the number of actual arguments to this call. 1458 unsigned getNumArgs() const { return NumArgs; } 1459 1460/// getArg - Return the specified argument. 1461 Expr *getArg(unsigned Arg) { 1462 assert(Arg < NumArgs && "Arg access out of range!"); 1463 return SubExprs[Arg+ARGS_START]; 1464 } 1465 const Expr *getArg(unsigned Arg) const { 1466 assert(Arg < NumArgs && "Arg access out of range!"); 1467 return SubExprs[Arg+ARGS_START]; 1468 } 1469 /// setArg - Set the specified argument. 1470 void setArg(unsigned Arg, Expr *ArgExpr) { 1471 assert(Arg < NumArgs && "Arg access out of range!"); 1472 SubExprs[Arg+ARGS_START] = ArgExpr; 1473 } 1474 SourceRange getSourceRange() const { return SourceRange(LBracloc, RBracloc); } 1475 1476 static bool classof(const Stmt *T) { 1477 return T->getStmtClass() == ObjCMessageExprClass; 1478 } 1479 static bool classof(const ObjCMessageExpr *) { return true; } 1480 1481 // Iterators 1482 virtual child_iterator child_begin(); 1483 virtual child_iterator child_end(); 1484}; 1485 1486} // end namespace clang 1487 1488#endif 1489