Expr.h revision 5cd9d6daf3acd4cc87fecebd81d9495b9e4ba9cd
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/APValue.h" 18#include "clang/AST/Stmt.h" 19#include "clang/AST/Type.h" 20#include "llvm/ADT/APSInt.h" 21#include "llvm/ADT/APFloat.h" 22#include "llvm/ADT/SmallVector.h" 23#include <vector> 24 25namespace clang { 26 class ASTContext; 27 class APValue; 28 class Decl; 29 class IdentifierInfo; 30 class ParmVarDecl; 31 class NamedDecl; 32 class ValueDecl; 33 class BlockDecl; 34 class CXXOperatorCallExpr; 35 class CXXMemberCallExpr; 36 37/// Expr - This represents one expression. Note that Expr's are subclasses of 38/// Stmt. This allows an expression to be transparently used any place a Stmt 39/// is required. 40/// 41class Expr : public Stmt { 42 QualType TR; 43 44 /// TypeDependent - Whether this expression is type-dependent 45 /// (C++ [temp.dep.expr]). 46 bool TypeDependent : 1; 47 48 /// ValueDependent - Whether this expression is value-dependent 49 /// (C++ [temp.dep.constexpr]). 50 bool ValueDependent : 1; 51 52protected: 53 // FIXME: Eventually, this constructor should go away and we should 54 // require every subclass to provide type/value-dependence 55 // information. 56 Expr(StmtClass SC, QualType T) 57 : Stmt(SC), TypeDependent(false), ValueDependent(false) { 58 setType(T); 59 } 60 61 Expr(StmtClass SC, QualType T, bool TD, bool VD) 62 : Stmt(SC), TypeDependent(TD), ValueDependent(VD) { 63 setType(T); 64 } 65 66public: 67 QualType getType() const { return TR; } 68 void setType(QualType t) { 69 // In C++, the type of an expression is always adjusted so that it 70 // will not have reference type an expression will never have 71 // reference type (C++ [expr]p6). Use 72 // QualType::getNonReferenceType() to retrieve the non-reference 73 // type. Additionally, inspect Expr::isLvalue to determine whether 74 // an expression that is adjusted in this manner should be 75 // considered an lvalue. 76 assert((TR.isNull() || !TR->isReferenceType()) && 77 "Expressions can't have reference type"); 78 79 TR = t; 80 } 81 82 /// isValueDependent - Determines whether this expression is 83 /// value-dependent (C++ [temp.dep.constexpr]). For example, the 84 /// array bound of "Chars" in the following example is 85 /// value-dependent. 86 /// @code 87 /// template<int Size, char (&Chars)[Size]> struct meta_string; 88 /// @endcode 89 bool isValueDependent() const { return ValueDependent; } 90 91 /// isTypeDependent - Determines whether this expression is 92 /// type-dependent (C++ [temp.dep.expr]), which means that its type 93 /// could change from one template instantiation to the next. For 94 /// example, the expressions "x" and "x + y" are type-dependent in 95 /// the following code, but "y" is not type-dependent: 96 /// @code 97 /// template<typename T> 98 /// void add(T x, int y) { 99 /// x + y; 100 /// } 101 /// @endcode 102 bool isTypeDependent() const { return TypeDependent; } 103 104 /// SourceLocation tokens are not useful in isolation - they are low level 105 /// value objects created/interpreted by SourceManager. We assume AST 106 /// clients will have a pointer to the respective SourceManager. 107 virtual SourceRange getSourceRange() const = 0; 108 109 /// getExprLoc - Return the preferred location for the arrow when diagnosing 110 /// a problem with a generic expression. 111 virtual SourceLocation getExprLoc() const { return getLocStart(); } 112 113 /// hasLocalSideEffect - Return true if this immediate expression has side 114 /// effects, not counting any sub-expressions. 115 bool hasLocalSideEffect() const; 116 117 /// isLvalue - C99 6.3.2.1: an lvalue is an expression with an object type or 118 /// incomplete type other than void. Nonarray expressions that can be lvalues: 119 /// - name, where name must be a variable 120 /// - e[i] 121 /// - (e), where e must be an lvalue 122 /// - e.name, where e must be an lvalue 123 /// - e->name 124 /// - *e, the type of e cannot be a function type 125 /// - string-constant 126 /// - reference type [C++ [expr]] 127 /// 128 enum isLvalueResult { 129 LV_Valid, 130 LV_NotObjectType, 131 LV_IncompleteVoidType, 132 LV_DuplicateVectorComponents, 133 LV_InvalidExpression, 134 LV_MemberFunction 135 }; 136 isLvalueResult isLvalue(ASTContext &Ctx) const; 137 138 /// isModifiableLvalue - C99 6.3.2.1: an lvalue that does not have array type, 139 /// does not have an incomplete type, does not have a const-qualified type, 140 /// and if it is a structure or union, does not have any member (including, 141 /// recursively, any member or element of all contained aggregates or unions) 142 /// with a const-qualified type. 143 enum isModifiableLvalueResult { 144 MLV_Valid, 145 MLV_NotObjectType, 146 MLV_IncompleteVoidType, 147 MLV_DuplicateVectorComponents, 148 MLV_InvalidExpression, 149 MLV_LValueCast, // Specialized form of MLV_InvalidExpression. 150 MLV_IncompleteType, 151 MLV_ConstQualified, 152 MLV_ArrayType, 153 MLV_NotBlockQualified, 154 MLV_ReadonlyProperty, 155 MLV_NoSetterProperty, 156 MLV_MemberFunction 157 }; 158 isModifiableLvalueResult isModifiableLvalue(ASTContext &Ctx) const; 159 160 bool isBitField(); 161 162 /// getIntegerConstantExprValue() - Return the value of an integer 163 /// constant expression. The expression must be a valid integer 164 /// constant expression as determined by isIntegerConstantExpr. 165 llvm::APSInt getIntegerConstantExprValue(ASTContext &Ctx) const { 166 llvm::APSInt X; 167 bool success = isIntegerConstantExpr(X, Ctx); 168 success = success; 169 assert(success && "Illegal argument to getIntegerConstantExpr"); 170 return X; 171 } 172 173 /// isIntegerConstantExpr - Return true if this expression is a valid integer 174 /// constant expression, and, if so, return its value in Result. If not a 175 /// valid i-c-e, return false and fill in Loc (if specified) with the location 176 /// of the invalid expression. 177 bool isIntegerConstantExpr(llvm::APSInt &Result, ASTContext &Ctx, 178 SourceLocation *Loc = 0, 179 bool isEvaluated = true) const; 180 bool isIntegerConstantExpr(ASTContext &Ctx, SourceLocation *Loc = 0) const { 181 llvm::APSInt X; 182 return isIntegerConstantExpr(X, Ctx, Loc); 183 } 184 /// isConstantExpr - Return true if this expression is a valid constant expr. 185 bool isConstantExpr(ASTContext &Ctx, SourceLocation *Loc) const; 186 187 /// EvalResult is a struct with detailed info about an evaluated expression. 188 struct EvalResult { 189 /// Val - This is the scalar value the expression can be folded to. 190 APValue Val; 191 192 /// HasSideEffects - Whether the evaluated expression has side effects. 193 /// For example, (f() && 0) can be folded, but it still has side effects. 194 bool HasSideEffects; 195 196 /// Diag - If the expression is unfoldable, then Diag contains a note 197 /// diagnostic indicating why it's not foldable. DiagLoc indicates a caret 198 /// position for the error, and DiagExpr is the expression that caused 199 /// the error. 200 /// If the expression is foldable, but not an integer constant expression, 201 /// Diag contains a note diagnostic that describes why it isn't an integer 202 /// constant expression. If the expression *is* an integer constant 203 /// expression, then Diag will be zero. 204 unsigned Diag; 205 const Expr *DiagExpr; 206 SourceLocation DiagLoc; 207 208 EvalResult() : HasSideEffects(false), Diag(0), DiagExpr(0) {} 209 }; 210 211 /// Evaluate - Return true if this is a constant which we can fold using 212 /// any crazy technique (that has nothing to do with language standards) that 213 /// we want to. If this function returns true, it returns the folded constant 214 /// in Result. 215 bool Evaluate(EvalResult &Result, ASTContext &Ctx) const; 216 217 /// isEvaluatable - Call Evaluate to see if this expression can be constant 218 /// folded, but discard the result. 219 bool isEvaluatable(ASTContext &Ctx) const; 220 221 /// EvaluateAsInt - Call Evaluate and return the folded integer. This 222 /// must be called on an expression that constant folds to an integer. 223 llvm::APSInt EvaluateAsInt(ASTContext &Ctx) const; 224 225 /// isNullPointerConstant - C99 6.3.2.3p3 - Return true if this is either an 226 /// integer constant expression with the value zero, or if this is one that is 227 /// cast to void*. 228 bool isNullPointerConstant(ASTContext &Ctx) const; 229 230 /// hasGlobalStorage - Return true if this expression has static storage 231 /// duration. This means that the address of this expression is a link-time 232 /// constant. 233 bool hasGlobalStorage() const; 234 235 /// IgnoreParens - Ignore parentheses. If this Expr is a ParenExpr, return 236 /// its subexpression. If that subexpression is also a ParenExpr, 237 /// then this method recursively returns its subexpression, and so forth. 238 /// Otherwise, the method returns the current Expr. 239 Expr* IgnoreParens(); 240 241 /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr 242 /// or CastExprs, returning their operand. 243 Expr *IgnoreParenCasts(); 244 245 const Expr* IgnoreParens() const { 246 return const_cast<Expr*>(this)->IgnoreParens(); 247 } 248 const Expr *IgnoreParenCasts() const { 249 return const_cast<Expr*>(this)->IgnoreParenCasts(); 250 } 251 252 static bool hasAnyTypeDependentArguments(Expr** Exprs, unsigned NumExprs); 253 static bool hasAnyValueDependentArguments(Expr** Exprs, unsigned NumExprs); 254 255 static bool classof(const Stmt *T) { 256 return T->getStmtClass() >= firstExprConstant && 257 T->getStmtClass() <= lastExprConstant; 258 } 259 static bool classof(const Expr *) { return true; } 260 261 static inline Expr* Create(llvm::Deserializer& D, ASTContext& C) { 262 return cast<Expr>(Stmt::Create(D, C)); 263 } 264}; 265 266 267//===----------------------------------------------------------------------===// 268// Primary Expressions. 269//===----------------------------------------------------------------------===// 270 271/// DeclRefExpr - [C99 6.5.1p2] - A reference to a declared variable, function, 272/// enum, etc. 273class DeclRefExpr : public Expr { 274 NamedDecl *D; 275 SourceLocation Loc; 276 277protected: 278 // FIXME: Eventually, this constructor will go away and all subclasses 279 // will have to provide the type- and value-dependent flags. 280 DeclRefExpr(StmtClass SC, NamedDecl *d, QualType t, SourceLocation l) : 281 Expr(SC, t), D(d), Loc(l) {} 282 283 DeclRefExpr(StmtClass SC, NamedDecl *d, QualType t, SourceLocation l, bool TD, 284 bool VD) : 285 Expr(SC, t, TD, VD), D(d), Loc(l) {} 286 287public: 288 // FIXME: Eventually, this constructor will go away and all clients 289 // will have to provide the type- and value-dependent flags. 290 DeclRefExpr(NamedDecl *d, QualType t, SourceLocation l) : 291 Expr(DeclRefExprClass, t), D(d), Loc(l) {} 292 293 DeclRefExpr(NamedDecl *d, QualType t, SourceLocation l, bool TD, bool VD) : 294 Expr(DeclRefExprClass, t, TD, VD), D(d), Loc(l) {} 295 296 NamedDecl *getDecl() { return D; } 297 const NamedDecl *getDecl() const { return D; } 298 void setDecl(NamedDecl *NewD) { D = NewD; } 299 300 SourceLocation getLocation() const { return Loc; } 301 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 302 303 static bool classof(const Stmt *T) { 304 return T->getStmtClass() == DeclRefExprClass || 305 T->getStmtClass() == CXXConditionDeclExprClass || 306 T->getStmtClass() == QualifiedDeclRefExprClass; 307 } 308 static bool classof(const DeclRefExpr *) { return true; } 309 310 // Iterators 311 virtual child_iterator child_begin(); 312 virtual child_iterator child_end(); 313 314 virtual void EmitImpl(llvm::Serializer& S) const; 315 static DeclRefExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); 316}; 317 318/// PredefinedExpr - [C99 6.4.2.2] - A predefined identifier such as __func__. 319class PredefinedExpr : public Expr { 320public: 321 enum IdentType { 322 Func, 323 Function, 324 PrettyFunction 325 }; 326 327private: 328 SourceLocation Loc; 329 IdentType Type; 330public: 331 PredefinedExpr(SourceLocation l, QualType type, IdentType IT) 332 : Expr(PredefinedExprClass, type), Loc(l), Type(IT) {} 333 334 IdentType getIdentType() const { return Type; } 335 336 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 337 338 static bool classof(const Stmt *T) { 339 return T->getStmtClass() == PredefinedExprClass; 340 } 341 static bool classof(const PredefinedExpr *) { return true; } 342 343 // Iterators 344 virtual child_iterator child_begin(); 345 virtual child_iterator child_end(); 346 347 virtual void EmitImpl(llvm::Serializer& S) const; 348 static PredefinedExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); 349}; 350 351class IntegerLiteral : public Expr { 352 llvm::APInt Value; 353 SourceLocation Loc; 354public: 355 // type should be IntTy, LongTy, LongLongTy, UnsignedIntTy, UnsignedLongTy, 356 // or UnsignedLongLongTy 357 IntegerLiteral(const llvm::APInt &V, QualType type, SourceLocation l) 358 : Expr(IntegerLiteralClass, type), Value(V), Loc(l) { 359 assert(type->isIntegerType() && "Illegal type in IntegerLiteral"); 360 } 361 const llvm::APInt &getValue() const { return Value; } 362 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 363 364 static bool classof(const Stmt *T) { 365 return T->getStmtClass() == IntegerLiteralClass; 366 } 367 static bool classof(const IntegerLiteral *) { return true; } 368 369 // Iterators 370 virtual child_iterator child_begin(); 371 virtual child_iterator child_end(); 372 373 virtual void EmitImpl(llvm::Serializer& S) const; 374 static IntegerLiteral* CreateImpl(llvm::Deserializer& D, ASTContext& C); 375}; 376 377class CharacterLiteral : public Expr { 378 unsigned Value; 379 SourceLocation Loc; 380 bool IsWide; 381public: 382 // type should be IntTy 383 CharacterLiteral(unsigned value, bool iswide, QualType type, SourceLocation l) 384 : Expr(CharacterLiteralClass, type), Value(value), Loc(l), IsWide(iswide) { 385 } 386 SourceLocation getLoc() const { return Loc; } 387 bool isWide() const { return IsWide; } 388 389 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 390 391 unsigned getValue() const { return Value; } 392 393 static bool classof(const Stmt *T) { 394 return T->getStmtClass() == CharacterLiteralClass; 395 } 396 static bool classof(const CharacterLiteral *) { return true; } 397 398 // Iterators 399 virtual child_iterator child_begin(); 400 virtual child_iterator child_end(); 401 402 virtual void EmitImpl(llvm::Serializer& S) const; 403 static CharacterLiteral* CreateImpl(llvm::Deserializer& D, ASTContext& C); 404}; 405 406class FloatingLiteral : public Expr { 407 llvm::APFloat Value; 408 bool IsExact : 1; 409 SourceLocation Loc; 410public: 411 FloatingLiteral(const llvm::APFloat &V, bool* isexact, 412 QualType Type, SourceLocation L) 413 : Expr(FloatingLiteralClass, Type), Value(V), IsExact(*isexact), Loc(L) {} 414 415 const llvm::APFloat &getValue() const { return Value; } 416 417 bool isExact() const { return IsExact; } 418 419 /// getValueAsApproximateDouble - This returns the value as an inaccurate 420 /// double. Note that this may cause loss of precision, but is useful for 421 /// debugging dumps, etc. 422 double getValueAsApproximateDouble() const; 423 424 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 425 426 static bool classof(const Stmt *T) { 427 return T->getStmtClass() == FloatingLiteralClass; 428 } 429 static bool classof(const FloatingLiteral *) { 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 FloatingLiteral* CreateImpl(llvm::Deserializer& D, ASTContext& C); 437}; 438 439/// ImaginaryLiteral - We support imaginary integer and floating point literals, 440/// like "1.0i". We represent these as a wrapper around FloatingLiteral and 441/// IntegerLiteral classes. Instances of this class always have a Complex type 442/// whose element type matches the subexpression. 443/// 444class ImaginaryLiteral : public Expr { 445 Stmt *Val; 446public: 447 ImaginaryLiteral(Expr *val, QualType Ty) 448 : Expr(ImaginaryLiteralClass, Ty), Val(val) {} 449 450 const Expr *getSubExpr() const { return cast<Expr>(Val); } 451 Expr *getSubExpr() { return cast<Expr>(Val); } 452 453 virtual SourceRange getSourceRange() const { return Val->getSourceRange(); } 454 static bool classof(const Stmt *T) { 455 return T->getStmtClass() == ImaginaryLiteralClass; 456 } 457 static bool classof(const ImaginaryLiteral *) { return true; } 458 459 // Iterators 460 virtual child_iterator child_begin(); 461 virtual child_iterator child_end(); 462 463 virtual void EmitImpl(llvm::Serializer& S) const; 464 static ImaginaryLiteral* CreateImpl(llvm::Deserializer& D, ASTContext& C); 465}; 466 467/// StringLiteral - This represents a string literal expression, e.g. "foo" 468/// or L"bar" (wide strings). The actual string is returned by getStrData() 469/// is NOT null-terminated, and the length of the string is determined by 470/// calling getByteLength(). The C type for a string is always a 471/// ConstantArrayType. 472class StringLiteral : public Expr { 473 const char *StrData; 474 unsigned ByteLength; 475 bool IsWide; 476 // if the StringLiteral was composed using token pasting, both locations 477 // are needed. If not (the common case), firstTokLoc == lastTokLoc. 478 // FIXME: if space becomes an issue, we should create a sub-class. 479 SourceLocation firstTokLoc, lastTokLoc; 480public: 481 StringLiteral(const char *strData, unsigned byteLength, bool Wide, 482 QualType t, SourceLocation b, SourceLocation e); 483 virtual ~StringLiteral(); 484 485 const char *getStrData() const { return StrData; } 486 unsigned getByteLength() const { return ByteLength; } 487 bool isWide() const { return IsWide; } 488 489 virtual SourceRange getSourceRange() const { 490 return SourceRange(firstTokLoc,lastTokLoc); 491 } 492 static bool classof(const Stmt *T) { 493 return T->getStmtClass() == StringLiteralClass; 494 } 495 static bool classof(const StringLiteral *) { return true; } 496 497 // Iterators 498 virtual child_iterator child_begin(); 499 virtual child_iterator child_end(); 500 501 virtual void EmitImpl(llvm::Serializer& S) const; 502 static StringLiteral* CreateImpl(llvm::Deserializer& D, ASTContext& C); 503}; 504 505/// ParenExpr - This represents a parethesized expression, e.g. "(1)". This 506/// AST node is only formed if full location information is requested. 507class ParenExpr : public Expr { 508 SourceLocation L, R; 509 Stmt *Val; 510public: 511 ParenExpr(SourceLocation l, SourceLocation r, Expr *val) 512 : Expr(ParenExprClass, val->getType(), 513 val->isTypeDependent(), val->isValueDependent()), 514 L(l), R(r), Val(val) {} 515 516 const Expr *getSubExpr() const { return cast<Expr>(Val); } 517 Expr *getSubExpr() { return cast<Expr>(Val); } 518 virtual SourceRange getSourceRange() const { return SourceRange(L, R); } 519 520 static bool classof(const Stmt *T) { 521 return T->getStmtClass() == ParenExprClass; 522 } 523 static bool classof(const ParenExpr *) { return true; } 524 525 // Iterators 526 virtual child_iterator child_begin(); 527 virtual child_iterator child_end(); 528 529 virtual void EmitImpl(llvm::Serializer& S) const; 530 static ParenExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); 531}; 532 533 534/// UnaryOperator - This represents the unary-expression's (except sizeof and 535/// alignof), the postinc/postdec operators from postfix-expression, and various 536/// extensions. 537/// 538/// Notes on various nodes: 539/// 540/// Real/Imag - These return the real/imag part of a complex operand. If 541/// applied to a non-complex value, the former returns its operand and the 542/// later returns zero in the type of the operand. 543/// 544/// __builtin_offsetof(type, a.b[10]) is represented as a unary operator whose 545/// subexpression is a compound literal with the various MemberExpr and 546/// ArraySubscriptExpr's applied to it. 547/// 548class UnaryOperator : public Expr { 549public: 550 // Note that additions to this should also update the StmtVisitor class. 551 enum Opcode { 552 PostInc, PostDec, // [C99 6.5.2.4] Postfix increment and decrement operators 553 PreInc, PreDec, // [C99 6.5.3.1] Prefix increment and decrement operators. 554 AddrOf, Deref, // [C99 6.5.3.2] Address and indirection operators. 555 Plus, Minus, // [C99 6.5.3.3] Unary arithmetic operators. 556 Not, LNot, // [C99 6.5.3.3] Unary arithmetic operators. 557 Real, Imag, // "__real expr"/"__imag expr" Extension. 558 Extension, // __extension__ marker. 559 OffsetOf // __builtin_offsetof 560 }; 561private: 562 Stmt *Val; 563 Opcode Opc; 564 SourceLocation Loc; 565public: 566 567 UnaryOperator(Expr *input, Opcode opc, QualType type, SourceLocation l) 568 : Expr(UnaryOperatorClass, type, 569 input->isTypeDependent() && opc != OffsetOf, 570 input->isValueDependent()), 571 Val(input), Opc(opc), Loc(l) {} 572 573 Opcode getOpcode() const { return Opc; } 574 Expr *getSubExpr() const { return cast<Expr>(Val); } 575 576 /// getOperatorLoc - Return the location of the operator. 577 SourceLocation getOperatorLoc() const { return Loc; } 578 579 /// isPostfix - Return true if this is a postfix operation, like x++. 580 static bool isPostfix(Opcode Op); 581 582 /// isPostfix - Return true if this is a prefix operation, like --x. 583 static bool isPrefix(Opcode Op); 584 585 bool isPrefix() const { return isPrefix(Opc); } 586 bool isPostfix() const { return isPostfix(Opc); } 587 bool isIncrementOp() const {return Opc==PreInc || Opc==PostInc; } 588 bool isIncrementDecrementOp() const { return Opc>=PostInc && Opc<=PreDec; } 589 bool isOffsetOfOp() const { return Opc == OffsetOf; } 590 static bool isArithmeticOp(Opcode Op) { return Op >= Plus && Op <= LNot; } 591 592 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 593 /// corresponds to, e.g. "sizeof" or "[pre]++" 594 static const char *getOpcodeStr(Opcode Op); 595 596 virtual SourceRange getSourceRange() const { 597 if (isPostfix()) 598 return SourceRange(Val->getLocStart(), Loc); 599 else 600 return SourceRange(Loc, Val->getLocEnd()); 601 } 602 virtual SourceLocation getExprLoc() const { return Loc; } 603 604 static bool classof(const Stmt *T) { 605 return T->getStmtClass() == UnaryOperatorClass; 606 } 607 static bool classof(const UnaryOperator *) { return true; } 608 609 int64_t evaluateOffsetOf(ASTContext& C) const; 610 611 // Iterators 612 virtual child_iterator child_begin(); 613 virtual child_iterator child_end(); 614 615 virtual void EmitImpl(llvm::Serializer& S) const; 616 static UnaryOperator* CreateImpl(llvm::Deserializer& D, ASTContext& C); 617}; 618 619/// SizeOfAlignOfExpr - [C99 6.5.3.4] - This is for sizeof/alignof, both of 620/// types and expressions. 621class SizeOfAlignOfExpr : public Expr { 622 bool isSizeof : 1; // true if sizeof, false if alignof. 623 bool isType : 1; // true if operand is a type, false if an expression 624 union { 625 void *Ty; 626 Stmt *Ex; 627 } Argument; 628 SourceLocation OpLoc, RParenLoc; 629public: 630 SizeOfAlignOfExpr(bool issizeof, bool istype, void *argument, 631 QualType resultType, SourceLocation op, 632 SourceLocation rp) : 633 Expr(SizeOfAlignOfExprClass, resultType), isSizeof(issizeof), 634 isType(istype), OpLoc(op), RParenLoc(rp) { 635 if (isType) 636 Argument.Ty = argument; 637 else 638 // argument was an Expr*, so cast it back to that to be safe 639 Argument.Ex = static_cast<Expr*>(argument); 640 } 641 642 virtual void Destroy(ASTContext& C); 643 644 bool isSizeOf() const { return isSizeof; } 645 bool isArgumentType() const { return isType; } 646 QualType getArgumentType() const { 647 assert(isArgumentType() && "calling getArgumentType() when arg is expr"); 648 return QualType::getFromOpaquePtr(Argument.Ty); 649 } 650 Expr* getArgumentExpr() const { 651 assert(!isArgumentType() && "calling getArgumentExpr() when arg is type"); 652 return static_cast<Expr*>(Argument.Ex); 653 } 654 /// Gets the argument type, or the type of the argument expression, whichever 655 /// is appropriate. 656 QualType getTypeOfArgument() const { 657 return isArgumentType() ? getArgumentType() : getArgumentExpr()->getType(); 658 } 659 660 SourceLocation getOperatorLoc() const { return OpLoc; } 661 662 virtual SourceRange getSourceRange() const { 663 return SourceRange(OpLoc, RParenLoc); 664 } 665 666 static bool classof(const Stmt *T) { 667 return T->getStmtClass() == SizeOfAlignOfExprClass; 668 } 669 static bool classof(const SizeOfAlignOfExpr *) { return true; } 670 671 // Iterators 672 virtual child_iterator child_begin(); 673 virtual child_iterator child_end(); 674 675 virtual void EmitImpl(llvm::Serializer& S) const; 676 static SizeOfAlignOfExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); 677}; 678 679//===----------------------------------------------------------------------===// 680// Postfix Operators. 681//===----------------------------------------------------------------------===// 682 683/// ArraySubscriptExpr - [C99 6.5.2.1] Array Subscripting. 684class ArraySubscriptExpr : public Expr { 685 enum { LHS, RHS, END_EXPR=2 }; 686 Stmt* SubExprs[END_EXPR]; 687 SourceLocation RBracketLoc; 688public: 689 ArraySubscriptExpr(Expr *lhs, Expr *rhs, QualType t, 690 SourceLocation rbracketloc) 691 : Expr(ArraySubscriptExprClass, t), RBracketLoc(rbracketloc) { 692 SubExprs[LHS] = lhs; 693 SubExprs[RHS] = rhs; 694 } 695 696 /// An array access can be written A[4] or 4[A] (both are equivalent). 697 /// - getBase() and getIdx() always present the normalized view: A[4]. 698 /// In this case getBase() returns "A" and getIdx() returns "4". 699 /// - getLHS() and getRHS() present the syntactic view. e.g. for 700 /// 4[A] getLHS() returns "4". 701 /// Note: Because vector element access is also written A[4] we must 702 /// predicate the format conversion in getBase and getIdx only on the 703 /// the type of the RHS, as it is possible for the LHS to be a vector of 704 /// integer type 705 Expr *getLHS() { return cast<Expr>(SubExprs[LHS]); } 706 const Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } 707 708 Expr *getRHS() { return cast<Expr>(SubExprs[RHS]); } 709 const Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 710 711 Expr *getBase() { 712 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getLHS():getRHS()); 713 } 714 715 const Expr *getBase() const { 716 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getLHS():getRHS()); 717 } 718 719 Expr *getIdx() { 720 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getRHS():getLHS()); 721 } 722 723 const Expr *getIdx() const { 724 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getRHS():getLHS()); 725 } 726 727 virtual SourceRange getSourceRange() const { 728 return SourceRange(getLHS()->getLocStart(), RBracketLoc); 729 } 730 731 virtual SourceLocation getExprLoc() const { return getBase()->getExprLoc(); } 732 733 static bool classof(const Stmt *T) { 734 return T->getStmtClass() == ArraySubscriptExprClass; 735 } 736 static bool classof(const ArraySubscriptExpr *) { return true; } 737 738 // Iterators 739 virtual child_iterator child_begin(); 740 virtual child_iterator child_end(); 741 742 virtual void EmitImpl(llvm::Serializer& S) const; 743 static ArraySubscriptExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); 744}; 745 746 747/// CallExpr - Represents a function call (C99 6.5.2.2, C++ [expr.call]). 748/// CallExpr itself represents a normal function call, e.g., "f(x, 2)", 749/// while its subclasses may represent alternative syntax that (semantically) 750/// results in a function call. For example, CXXOperatorCallExpr is 751/// a subclass for overloaded operator calls that use operator syntax, e.g., 752/// "str1 + str2" to resolve to a function call. 753class CallExpr : public Expr { 754 enum { FN=0, ARGS_START=1 }; 755 Stmt **SubExprs; 756 unsigned NumArgs; 757 SourceLocation RParenLoc; 758 759 // This version of the ctor is for deserialization. 760 CallExpr(StmtClass SC, Stmt** subexprs, unsigned numargs, QualType t, 761 SourceLocation rparenloc) 762 : Expr(SC,t), SubExprs(subexprs), 763 NumArgs(numargs), RParenLoc(rparenloc) {} 764 765protected: 766 // This version of the constructor is for derived classes. 767 CallExpr(StmtClass SC, Expr *fn, Expr **args, unsigned numargs, QualType t, 768 SourceLocation rparenloc); 769 770public: 771 CallExpr(Expr *fn, Expr **args, unsigned numargs, QualType t, 772 SourceLocation rparenloc); 773 ~CallExpr() { 774 delete [] SubExprs; 775 } 776 777 const Expr *getCallee() const { return cast<Expr>(SubExprs[FN]); } 778 Expr *getCallee() { return cast<Expr>(SubExprs[FN]); } 779 void setCallee(Expr *F) { SubExprs[FN] = F; } 780 781 /// getNumArgs - Return the number of actual arguments to this call. 782 /// 783 unsigned getNumArgs() const { return NumArgs; } 784 785 /// getArg - Return the specified argument. 786 Expr *getArg(unsigned Arg) { 787 assert(Arg < NumArgs && "Arg access out of range!"); 788 return cast<Expr>(SubExprs[Arg+ARGS_START]); 789 } 790 const Expr *getArg(unsigned Arg) const { 791 assert(Arg < NumArgs && "Arg access out of range!"); 792 return cast<Expr>(SubExprs[Arg+ARGS_START]); 793 } 794 /// setArg - Set the specified argument. 795 void setArg(unsigned Arg, Expr *ArgExpr) { 796 assert(Arg < NumArgs && "Arg access out of range!"); 797 SubExprs[Arg+ARGS_START] = ArgExpr; 798 } 799 800 /// setNumArgs - This changes the number of arguments present in this call. 801 /// Any orphaned expressions are deleted by this, and any new operands are set 802 /// to null. 803 void setNumArgs(unsigned NumArgs); 804 805 typedef ExprIterator arg_iterator; 806 typedef ConstExprIterator const_arg_iterator; 807 808 arg_iterator arg_begin() { return SubExprs+ARGS_START; } 809 arg_iterator arg_end() { return SubExprs+ARGS_START+getNumArgs(); } 810 const_arg_iterator arg_begin() const { return SubExprs+ARGS_START; } 811 const_arg_iterator arg_end() const { return SubExprs+ARGS_START+getNumArgs();} 812 813 /// getNumCommas - Return the number of commas that must have been present in 814 /// this function call. 815 unsigned getNumCommas() const { return NumArgs ? NumArgs - 1 : 0; } 816 817 /// isBuiltinCall - If this is a call to a builtin, return the builtin ID. If 818 /// not, return 0. 819 unsigned isBuiltinCall() const; 820 821 SourceLocation getRParenLoc() const { return RParenLoc; } 822 823 virtual SourceRange getSourceRange() const { 824 return SourceRange(getCallee()->getLocStart(), RParenLoc); 825 } 826 827 static bool classof(const Stmt *T) { 828 return T->getStmtClass() == CallExprClass || 829 T->getStmtClass() == CXXOperatorCallExprClass || 830 T->getStmtClass() == CXXMemberCallExprClass; 831 } 832 static bool classof(const CallExpr *) { return true; } 833 static bool classof(const CXXOperatorCallExpr *) { return true; } 834 static bool classof(const CXXMemberCallExpr *) { return true; } 835 836 // Iterators 837 virtual child_iterator child_begin(); 838 virtual child_iterator child_end(); 839 840 virtual void EmitImpl(llvm::Serializer& S) const; 841 static CallExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C, 842 StmtClass SC); 843}; 844 845/// MemberExpr - [C99 6.5.2.3] Structure and Union Members. 846/// 847class MemberExpr : public Expr { 848 Stmt *Base; 849 NamedDecl *MemberDecl; 850 SourceLocation MemberLoc; 851 bool IsArrow; // True if this is "X->F", false if this is "X.F". 852public: 853 MemberExpr(Expr *base, bool isarrow, NamedDecl *memberdecl, SourceLocation l, 854 QualType ty) 855 : Expr(MemberExprClass, ty), 856 Base(base), MemberDecl(memberdecl), MemberLoc(l), IsArrow(isarrow) {} 857 858 void setBase(Expr *E) { Base = E; } 859 Expr *getBase() const { return cast<Expr>(Base); } 860 NamedDecl *getMemberDecl() const { return MemberDecl; } 861 void setMemberDecl(NamedDecl *D) { MemberDecl = D; } 862 bool isArrow() const { return IsArrow; } 863 864 virtual SourceRange getSourceRange() const { 865 return SourceRange(getBase()->getLocStart(), MemberLoc); 866 } 867 868 virtual SourceLocation getExprLoc() const { return MemberLoc; } 869 870 static bool classof(const Stmt *T) { 871 return T->getStmtClass() == MemberExprClass; 872 } 873 static bool classof(const MemberExpr *) { return true; } 874 875 // Iterators 876 virtual child_iterator child_begin(); 877 virtual child_iterator child_end(); 878 879 virtual void EmitImpl(llvm::Serializer& S) const; 880 static MemberExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); 881}; 882 883/// CompoundLiteralExpr - [C99 6.5.2.5] 884/// 885class CompoundLiteralExpr : public Expr { 886 /// LParenLoc - If non-null, this is the location of the left paren in a 887 /// compound literal like "(int){4}". This can be null if this is a 888 /// synthesized compound expression. 889 SourceLocation LParenLoc; 890 Stmt *Init; 891 bool FileScope; 892public: 893 CompoundLiteralExpr(SourceLocation lparenloc, QualType ty, Expr *init, 894 bool fileScope) 895 : Expr(CompoundLiteralExprClass, ty), LParenLoc(lparenloc), Init(init), 896 FileScope(fileScope) {} 897 898 const Expr *getInitializer() const { return cast<Expr>(Init); } 899 Expr *getInitializer() { return cast<Expr>(Init); } 900 901 bool isFileScope() const { return FileScope; } 902 903 SourceLocation getLParenLoc() const { return LParenLoc; } 904 905 virtual SourceRange getSourceRange() const { 906 // FIXME: Init should never be null. 907 if (!Init) 908 return SourceRange(); 909 if (LParenLoc.isInvalid()) 910 return Init->getSourceRange(); 911 return SourceRange(LParenLoc, Init->getLocEnd()); 912 } 913 914 static bool classof(const Stmt *T) { 915 return T->getStmtClass() == CompoundLiteralExprClass; 916 } 917 static bool classof(const CompoundLiteralExpr *) { return true; } 918 919 // Iterators 920 virtual child_iterator child_begin(); 921 virtual child_iterator child_end(); 922 923 virtual void EmitImpl(llvm::Serializer& S) const; 924 static CompoundLiteralExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); 925}; 926 927/// CastExpr - Base class for type casts, including both implicit 928/// casts (ImplicitCastExpr) and explicit casts that have some 929/// representation in the source code (ExplicitCastExpr's derived 930/// classes). 931class CastExpr : public Expr { 932 Stmt *Op; 933protected: 934 CastExpr(StmtClass SC, QualType ty, Expr *op) : 935 Expr(SC, ty, 936 // Cast expressions are type-dependent if the type is 937 // dependent (C++ [temp.dep.expr]p3). 938 ty->isDependentType(), 939 // Cast expressions are value-dependent if the type is 940 // dependent or if the subexpression is value-dependent. 941 ty->isDependentType() || (op && op->isValueDependent())), 942 Op(op) {} 943 944public: 945 Expr *getSubExpr() { return cast<Expr>(Op); } 946 const Expr *getSubExpr() const { return cast<Expr>(Op); } 947 948 static bool classof(const Stmt *T) { 949 StmtClass SC = T->getStmtClass(); 950 if (SC >= CXXNamedCastExprClass && SC <= CXXFunctionalCastExprClass) 951 return true; 952 953 if (SC >= ImplicitCastExprClass && SC <= CStyleCastExprClass) 954 return true; 955 956 return false; 957 } 958 static bool classof(const CastExpr *) { return true; } 959 960 // Iterators 961 virtual child_iterator child_begin(); 962 virtual child_iterator child_end(); 963}; 964 965/// ImplicitCastExpr - Allows us to explicitly represent implicit type 966/// conversions, which have no direct representation in the original 967/// source code. For example: converting T[]->T*, void f()->void 968/// (*f)(), float->double, short->int, etc. 969/// 970/// In C, implicit casts always produce rvalues. However, in C++, an 971/// implicit cast whose result is being bound to a reference will be 972/// an lvalue. For example: 973/// 974/// @code 975/// class Base { }; 976/// class Derived : public Base { }; 977/// void f(Derived d) { 978/// Base& b = d; // initializer is an ImplicitCastExpr to an lvalue of type Base 979/// } 980/// @endcode 981class ImplicitCastExpr : public CastExpr { 982 /// LvalueCast - Whether this cast produces an lvalue. 983 bool LvalueCast; 984 985public: 986 ImplicitCastExpr(QualType ty, Expr *op, bool Lvalue) : 987 CastExpr(ImplicitCastExprClass, ty, op), LvalueCast(Lvalue) { } 988 989 virtual SourceRange getSourceRange() const { 990 return getSubExpr()->getSourceRange(); 991 } 992 993 /// isLvalueCast - Whether this cast produces an lvalue. 994 bool isLvalueCast() const { return LvalueCast; } 995 996 /// setLvalueCast - Set whether this cast produces an lvalue. 997 void setLvalueCast(bool Lvalue) { LvalueCast = Lvalue; } 998 999 static bool classof(const Stmt *T) { 1000 return T->getStmtClass() == ImplicitCastExprClass; 1001 } 1002 static bool classof(const ImplicitCastExpr *) { return true; } 1003 1004 virtual void EmitImpl(llvm::Serializer& S) const; 1005 static ImplicitCastExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1006}; 1007 1008/// ExplicitCastExpr - An explicit cast written in the source 1009/// code. 1010/// 1011/// This class is effectively an abstract class, because it provides 1012/// the basic representation of an explicitly-written cast without 1013/// specifying which kind of cast (C cast, functional cast, static 1014/// cast, etc.) was written; specific derived classes represent the 1015/// particular style of cast and its location information. 1016/// 1017/// Unlike implicit casts, explicit cast nodes have two different 1018/// types: the type that was written into the source code, and the 1019/// actual type of the expression as determined by semantic 1020/// analysis. These types may differ slightly. For example, in C++ one 1021/// can cast to a reference type, which indicates that the resulting 1022/// expression will be an lvalue. The reference type, however, will 1023/// not be used as the type of the expression. 1024class ExplicitCastExpr : public CastExpr { 1025 /// TypeAsWritten - The type that this expression is casting to, as 1026 /// written in the source code. 1027 QualType TypeAsWritten; 1028 1029protected: 1030 ExplicitCastExpr(StmtClass SC, QualType exprTy, Expr *op, QualType writtenTy) 1031 : CastExpr(SC, exprTy, op), TypeAsWritten(writtenTy) {} 1032 1033public: 1034 /// getTypeAsWritten - Returns the type that this expression is 1035 /// casting to, as written in the source code. 1036 QualType getTypeAsWritten() const { return TypeAsWritten; } 1037 1038 static bool classof(const Stmt *T) { 1039 StmtClass SC = T->getStmtClass(); 1040 if (SC >= ExplicitCastExprClass && SC <= CStyleCastExprClass) 1041 return true; 1042 if (SC >= CXXNamedCastExprClass && SC <= CXXFunctionalCastExprClass) 1043 return true; 1044 1045 return false; 1046 } 1047 static bool classof(const ExplicitCastExpr *) { return true; } 1048}; 1049 1050/// CStyleCastExpr - An explicit cast in C (C99 6.5.4) or a C-style 1051/// cast in C++ (C++ [expr.cast]), which uses the syntax 1052/// (Type)expr. For example: @c (int)f. 1053class CStyleCastExpr : public ExplicitCastExpr { 1054 SourceLocation LPLoc; // the location of the left paren 1055 SourceLocation RPLoc; // the location of the right paren 1056public: 1057 CStyleCastExpr(QualType exprTy, Expr *op, QualType writtenTy, 1058 SourceLocation l, SourceLocation r) : 1059 ExplicitCastExpr(CStyleCastExprClass, exprTy, op, writtenTy), 1060 LPLoc(l), RPLoc(r) {} 1061 1062 SourceLocation getLParenLoc() const { return LPLoc; } 1063 SourceLocation getRParenLoc() const { return RPLoc; } 1064 1065 virtual SourceRange getSourceRange() const { 1066 return SourceRange(LPLoc, getSubExpr()->getSourceRange().getEnd()); 1067 } 1068 static bool classof(const Stmt *T) { 1069 return T->getStmtClass() == CStyleCastExprClass; 1070 } 1071 static bool classof(const CStyleCastExpr *) { return true; } 1072 1073 virtual void EmitImpl(llvm::Serializer& S) const; 1074 static CStyleCastExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1075}; 1076 1077class BinaryOperator : public Expr { 1078public: 1079 enum Opcode { 1080 // Operators listed in order of precedence. 1081 // Note that additions to this should also update the StmtVisitor class. 1082 Mul, Div, Rem, // [C99 6.5.5] Multiplicative operators. 1083 Add, Sub, // [C99 6.5.6] Additive operators. 1084 Shl, Shr, // [C99 6.5.7] Bitwise shift operators. 1085 LT, GT, LE, GE, // [C99 6.5.8] Relational operators. 1086 EQ, NE, // [C99 6.5.9] Equality operators. 1087 And, // [C99 6.5.10] Bitwise AND operator. 1088 Xor, // [C99 6.5.11] Bitwise XOR operator. 1089 Or, // [C99 6.5.12] Bitwise OR operator. 1090 LAnd, // [C99 6.5.13] Logical AND operator. 1091 LOr, // [C99 6.5.14] Logical OR operator. 1092 Assign, MulAssign,// [C99 6.5.16] Assignment operators. 1093 DivAssign, RemAssign, 1094 AddAssign, SubAssign, 1095 ShlAssign, ShrAssign, 1096 AndAssign, XorAssign, 1097 OrAssign, 1098 Comma // [C99 6.5.17] Comma operator. 1099 }; 1100private: 1101 enum { LHS, RHS, END_EXPR }; 1102 Stmt* SubExprs[END_EXPR]; 1103 Opcode Opc; 1104 SourceLocation OpLoc; 1105public: 1106 1107 BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, 1108 SourceLocation opLoc) 1109 : Expr(BinaryOperatorClass, ResTy, 1110 lhs->isTypeDependent() || rhs->isTypeDependent(), 1111 lhs->isValueDependent() || rhs->isValueDependent()), 1112 Opc(opc), OpLoc(opLoc) { 1113 SubExprs[LHS] = lhs; 1114 SubExprs[RHS] = rhs; 1115 assert(!isCompoundAssignmentOp() && 1116 "Use ArithAssignBinaryOperator for compound assignments"); 1117 } 1118 1119 SourceLocation getOperatorLoc() const { return OpLoc; } 1120 Opcode getOpcode() const { return Opc; } 1121 Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } 1122 Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 1123 virtual SourceRange getSourceRange() const { 1124 return SourceRange(getLHS()->getLocStart(), getRHS()->getLocEnd()); 1125 } 1126 1127 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 1128 /// corresponds to, e.g. "<<=". 1129 static const char *getOpcodeStr(Opcode Op); 1130 1131 /// predicates to categorize the respective opcodes. 1132 bool isMultiplicativeOp() const { return Opc >= Mul && Opc <= Rem; } 1133 bool isAdditiveOp() const { return Opc == Add || Opc == Sub; } 1134 bool isShiftOp() const { return Opc == Shl || Opc == Shr; } 1135 bool isBitwiseOp() const { return Opc >= And && Opc <= Or; } 1136 1137 static bool isRelationalOp(Opcode Opc) { return Opc >= LT && Opc <= GE; } 1138 bool isRelationalOp() const { return isRelationalOp(Opc); } 1139 1140 static bool isEqualityOp(Opcode Opc) { return Opc == EQ || Opc == NE; } 1141 bool isEqualityOp() const { return isEqualityOp(Opc); } 1142 1143 static bool isLogicalOp(Opcode Opc) { return Opc == LAnd || Opc == LOr; } 1144 bool isLogicalOp() const { return isLogicalOp(Opc); } 1145 1146 bool isAssignmentOp() const { return Opc >= Assign && Opc <= OrAssign; } 1147 bool isCompoundAssignmentOp() const { return Opc > Assign && Opc <= OrAssign;} 1148 bool isShiftAssignOp() const { return Opc == ShlAssign || Opc == ShrAssign; } 1149 1150 static bool classof(const Stmt *S) { 1151 return S->getStmtClass() == BinaryOperatorClass || 1152 S->getStmtClass() == CompoundAssignOperatorClass; 1153 } 1154 static bool classof(const BinaryOperator *) { return true; } 1155 1156 // Iterators 1157 virtual child_iterator child_begin(); 1158 virtual child_iterator child_end(); 1159 1160 virtual void EmitImpl(llvm::Serializer& S) const; 1161 static BinaryOperator* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1162 1163protected: 1164 BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, 1165 SourceLocation oploc, bool dead) 1166 : Expr(CompoundAssignOperatorClass, ResTy), Opc(opc), OpLoc(oploc) { 1167 SubExprs[LHS] = lhs; 1168 SubExprs[RHS] = rhs; 1169 } 1170}; 1171 1172/// CompoundAssignOperator - For compound assignments (e.g. +=), we keep 1173/// track of the type the operation is performed in. Due to the semantics of 1174/// these operators, the operands are promoted, the aritmetic performed, an 1175/// implicit conversion back to the result type done, then the assignment takes 1176/// place. This captures the intermediate type which the computation is done 1177/// in. 1178class CompoundAssignOperator : public BinaryOperator { 1179 QualType ComputationType; 1180public: 1181 CompoundAssignOperator(Expr *lhs, Expr *rhs, Opcode opc, 1182 QualType ResType, QualType CompType, 1183 SourceLocation OpLoc) 1184 : BinaryOperator(lhs, rhs, opc, ResType, OpLoc, true), 1185 ComputationType(CompType) { 1186 assert(isCompoundAssignmentOp() && 1187 "Only should be used for compound assignments"); 1188 } 1189 1190 QualType getComputationType() const { return ComputationType; } 1191 1192 static bool classof(const CompoundAssignOperator *) { return true; } 1193 static bool classof(const Stmt *S) { 1194 return S->getStmtClass() == CompoundAssignOperatorClass; 1195 } 1196 1197 virtual void EmitImpl(llvm::Serializer& S) const; 1198 static CompoundAssignOperator* CreateImpl(llvm::Deserializer& D, 1199 ASTContext& C); 1200}; 1201 1202/// ConditionalOperator - The ?: operator. Note that LHS may be null when the 1203/// GNU "missing LHS" extension is in use. 1204/// 1205class ConditionalOperator : public Expr { 1206 enum { COND, LHS, RHS, END_EXPR }; 1207 Stmt* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. 1208public: 1209 ConditionalOperator(Expr *cond, Expr *lhs, Expr *rhs, QualType t) 1210 : Expr(ConditionalOperatorClass, t, 1211 // FIXME: the type of the conditional operator doesn't 1212 // depend on the type of the conditional, but the standard 1213 // seems to imply that it could. File a bug! 1214 ((lhs && lhs->isTypeDependent()) || (rhs && rhs->isTypeDependent())), 1215 (cond->isValueDependent() || 1216 (lhs && lhs->isValueDependent()) || 1217 (rhs && rhs->isValueDependent()))) { 1218 SubExprs[COND] = cond; 1219 SubExprs[LHS] = lhs; 1220 SubExprs[RHS] = rhs; 1221 } 1222 1223 // getCond - Return the expression representing the condition for 1224 // the ?: operator. 1225 Expr *getCond() const { return cast<Expr>(SubExprs[COND]); } 1226 1227 // getTrueExpr - Return the subexpression representing the value of the ?: 1228 // expression if the condition evaluates to true. In most cases this value 1229 // will be the same as getLHS() except a GCC extension allows the left 1230 // subexpression to be omitted, and instead of the condition be returned. 1231 // e.g: x ?: y is shorthand for x ? x : y, except that the expression "x" 1232 // is only evaluated once. 1233 Expr *getTrueExpr() const { 1234 return cast<Expr>(SubExprs[LHS] ? SubExprs[LHS] : SubExprs[COND]); 1235 } 1236 1237 // getTrueExpr - Return the subexpression representing the value of the ?: 1238 // expression if the condition evaluates to false. This is the same as getRHS. 1239 Expr *getFalseExpr() const { return cast<Expr>(SubExprs[RHS]); } 1240 1241 Expr *getLHS() const { return cast_or_null<Expr>(SubExprs[LHS]); } 1242 Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 1243 1244 virtual SourceRange getSourceRange() const { 1245 return SourceRange(getCond()->getLocStart(), getRHS()->getLocEnd()); 1246 } 1247 static bool classof(const Stmt *T) { 1248 return T->getStmtClass() == ConditionalOperatorClass; 1249 } 1250 static bool classof(const ConditionalOperator *) { return true; } 1251 1252 // Iterators 1253 virtual child_iterator child_begin(); 1254 virtual child_iterator child_end(); 1255 1256 virtual void EmitImpl(llvm::Serializer& S) const; 1257 static ConditionalOperator* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1258}; 1259 1260/// AddrLabelExpr - The GNU address of label extension, representing &&label. 1261class AddrLabelExpr : public Expr { 1262 SourceLocation AmpAmpLoc, LabelLoc; 1263 LabelStmt *Label; 1264public: 1265 AddrLabelExpr(SourceLocation AALoc, SourceLocation LLoc, LabelStmt *L, 1266 QualType t) 1267 : Expr(AddrLabelExprClass, t), AmpAmpLoc(AALoc), LabelLoc(LLoc), Label(L) {} 1268 1269 virtual SourceRange getSourceRange() const { 1270 return SourceRange(AmpAmpLoc, LabelLoc); 1271 } 1272 1273 LabelStmt *getLabel() const { return Label; } 1274 1275 static bool classof(const Stmt *T) { 1276 return T->getStmtClass() == AddrLabelExprClass; 1277 } 1278 static bool classof(const AddrLabelExpr *) { return true; } 1279 1280 // Iterators 1281 virtual child_iterator child_begin(); 1282 virtual child_iterator child_end(); 1283 1284 virtual void EmitImpl(llvm::Serializer& S) const; 1285 static AddrLabelExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1286}; 1287 1288/// StmtExpr - This is the GNU Statement Expression extension: ({int X=4; X;}). 1289/// The StmtExpr contains a single CompoundStmt node, which it evaluates and 1290/// takes the value of the last subexpression. 1291class StmtExpr : public Expr { 1292 Stmt *SubStmt; 1293 SourceLocation LParenLoc, RParenLoc; 1294public: 1295 StmtExpr(CompoundStmt *substmt, QualType T, 1296 SourceLocation lp, SourceLocation rp) : 1297 Expr(StmtExprClass, T), SubStmt(substmt), LParenLoc(lp), RParenLoc(rp) { } 1298 1299 CompoundStmt *getSubStmt() { return cast<CompoundStmt>(SubStmt); } 1300 const CompoundStmt *getSubStmt() const { return cast<CompoundStmt>(SubStmt); } 1301 1302 virtual SourceRange getSourceRange() const { 1303 return SourceRange(LParenLoc, RParenLoc); 1304 } 1305 1306 static bool classof(const Stmt *T) { 1307 return T->getStmtClass() == StmtExprClass; 1308 } 1309 static bool classof(const StmtExpr *) { return true; } 1310 1311 // Iterators 1312 virtual child_iterator child_begin(); 1313 virtual child_iterator child_end(); 1314 1315 virtual void EmitImpl(llvm::Serializer& S) const; 1316 static StmtExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1317}; 1318 1319/// TypesCompatibleExpr - GNU builtin-in function __builtin_type_compatible_p. 1320/// This AST node represents a function that returns 1 if two *types* (not 1321/// expressions) are compatible. The result of this built-in function can be 1322/// used in integer constant expressions. 1323class TypesCompatibleExpr : public Expr { 1324 QualType Type1; 1325 QualType Type2; 1326 SourceLocation BuiltinLoc, RParenLoc; 1327public: 1328 TypesCompatibleExpr(QualType ReturnType, SourceLocation BLoc, 1329 QualType t1, QualType t2, SourceLocation RP) : 1330 Expr(TypesCompatibleExprClass, ReturnType), Type1(t1), Type2(t2), 1331 BuiltinLoc(BLoc), RParenLoc(RP) {} 1332 1333 QualType getArgType1() const { return Type1; } 1334 QualType getArgType2() const { return Type2; } 1335 1336 virtual SourceRange getSourceRange() const { 1337 return SourceRange(BuiltinLoc, RParenLoc); 1338 } 1339 static bool classof(const Stmt *T) { 1340 return T->getStmtClass() == TypesCompatibleExprClass; 1341 } 1342 static bool classof(const TypesCompatibleExpr *) { return true; } 1343 1344 // Iterators 1345 virtual child_iterator child_begin(); 1346 virtual child_iterator child_end(); 1347 1348 virtual void EmitImpl(llvm::Serializer& S) const; 1349 static TypesCompatibleExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1350}; 1351 1352/// ShuffleVectorExpr - clang-specific builtin-in function 1353/// __builtin_shufflevector. 1354/// This AST node represents a operator that does a constant 1355/// shuffle, similar to LLVM's shufflevector instruction. It takes 1356/// two vectors and a variable number of constant indices, 1357/// and returns the appropriately shuffled vector. 1358class ShuffleVectorExpr : public Expr { 1359 SourceLocation BuiltinLoc, RParenLoc; 1360 1361 // SubExprs - the list of values passed to the __builtin_shufflevector 1362 // function. The first two are vectors, and the rest are constant 1363 // indices. The number of values in this list is always 1364 // 2+the number of indices in the vector type. 1365 Stmt **SubExprs; 1366 unsigned NumExprs; 1367 1368public: 1369 ShuffleVectorExpr(Expr **args, unsigned nexpr, 1370 QualType Type, SourceLocation BLoc, 1371 SourceLocation RP) : 1372 Expr(ShuffleVectorExprClass, Type), BuiltinLoc(BLoc), 1373 RParenLoc(RP), NumExprs(nexpr) { 1374 1375 SubExprs = new Stmt*[nexpr]; 1376 for (unsigned i = 0; i < nexpr; i++) 1377 SubExprs[i] = args[i]; 1378 } 1379 1380 virtual SourceRange getSourceRange() const { 1381 return SourceRange(BuiltinLoc, RParenLoc); 1382 } 1383 static bool classof(const Stmt *T) { 1384 return T->getStmtClass() == ShuffleVectorExprClass; 1385 } 1386 static bool classof(const ShuffleVectorExpr *) { return true; } 1387 1388 ~ShuffleVectorExpr() { 1389 delete [] SubExprs; 1390 } 1391 1392 /// getNumSubExprs - Return the size of the SubExprs array. This includes the 1393 /// constant expression, the actual arguments passed in, and the function 1394 /// pointers. 1395 unsigned getNumSubExprs() const { return NumExprs; } 1396 1397 /// getExpr - Return the Expr at the specified index. 1398 Expr *getExpr(unsigned Index) { 1399 assert((Index < NumExprs) && "Arg access out of range!"); 1400 return cast<Expr>(SubExprs[Index]); 1401 } 1402 const Expr *getExpr(unsigned Index) const { 1403 assert((Index < NumExprs) && "Arg access out of range!"); 1404 return cast<Expr>(SubExprs[Index]); 1405 } 1406 1407 unsigned getShuffleMaskIdx(ASTContext &Ctx, unsigned N) { 1408 assert((N < NumExprs - 2) && "Shuffle idx out of range!"); 1409 return getExpr(N+2)->getIntegerConstantExprValue(Ctx).getZExtValue(); 1410 } 1411 1412 // Iterators 1413 virtual child_iterator child_begin(); 1414 virtual child_iterator child_end(); 1415 1416 virtual void EmitImpl(llvm::Serializer& S) const; 1417 static ShuffleVectorExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1418}; 1419 1420/// ChooseExpr - GNU builtin-in function __builtin_choose_expr. 1421/// This AST node is similar to the conditional operator (?:) in C, with 1422/// the following exceptions: 1423/// - the test expression must be a constant expression. 1424/// - the expression returned has it's type unaltered by promotion rules. 1425/// - does not evaluate the expression that was not chosen. 1426class ChooseExpr : public Expr { 1427 enum { COND, LHS, RHS, END_EXPR }; 1428 Stmt* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. 1429 SourceLocation BuiltinLoc, RParenLoc; 1430public: 1431 ChooseExpr(SourceLocation BLoc, Expr *cond, Expr *lhs, Expr *rhs, QualType t, 1432 SourceLocation RP) 1433 : Expr(ChooseExprClass, t), 1434 BuiltinLoc(BLoc), RParenLoc(RP) { 1435 SubExprs[COND] = cond; 1436 SubExprs[LHS] = lhs; 1437 SubExprs[RHS] = rhs; 1438 } 1439 1440 /// isConditionTrue - Return true if the condition is true. This is always 1441 /// statically knowable for a well-formed choosexpr. 1442 bool isConditionTrue(ASTContext &C) const; 1443 1444 Expr *getCond() const { return cast<Expr>(SubExprs[COND]); } 1445 Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } 1446 Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 1447 1448 virtual SourceRange getSourceRange() const { 1449 return SourceRange(BuiltinLoc, RParenLoc); 1450 } 1451 static bool classof(const Stmt *T) { 1452 return T->getStmtClass() == ChooseExprClass; 1453 } 1454 static bool classof(const ChooseExpr *) { return true; } 1455 1456 // Iterators 1457 virtual child_iterator child_begin(); 1458 virtual child_iterator child_end(); 1459 1460 virtual void EmitImpl(llvm::Serializer& S) const; 1461 static ChooseExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1462}; 1463 1464/// GNUNullExpr - Implements the GNU __null extension, which is a name 1465/// for a null pointer constant that has integral type (e.g., int or 1466/// long) and is the same size and alignment as a pointer. The __null 1467/// extension is typically only used by system headers, which define 1468/// NULL as __null in C++ rather than using 0 (which is an integer 1469/// that may not match the size of a pointer). 1470class GNUNullExpr : public Expr { 1471 /// TokenLoc - The location of the __null keyword. 1472 SourceLocation TokenLoc; 1473 1474public: 1475 GNUNullExpr(QualType Ty, SourceLocation Loc) 1476 : Expr(GNUNullExprClass, Ty), TokenLoc(Loc) { } 1477 1478 /// getTokenLocation - The location of the __null token. 1479 SourceLocation getTokenLocation() const { return TokenLoc; } 1480 1481 virtual SourceRange getSourceRange() const { 1482 return SourceRange(TokenLoc); 1483 } 1484 static bool classof(const Stmt *T) { 1485 return T->getStmtClass() == GNUNullExprClass; 1486 } 1487 static bool classof(const GNUNullExpr *) { return true; } 1488 1489 // Iterators 1490 virtual child_iterator child_begin(); 1491 virtual child_iterator child_end(); 1492 1493 virtual void EmitImpl(llvm::Serializer& S) const; 1494 static GNUNullExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1495}; 1496 1497/// OverloadExpr - Clang builtin function __builtin_overload. 1498/// This AST node provides a way to overload functions in C. 1499/// 1500/// The first argument is required to be a constant expression, for the number 1501/// of arguments passed to each candidate function. 1502/// 1503/// The next N arguments, where N is the value of the constant expression, 1504/// are the values to be passed as arguments. 1505/// 1506/// The rest of the arguments are values of pointer to function type, which 1507/// are the candidate functions for overloading. 1508/// 1509/// The result is a equivalent to a CallExpr taking N arguments to the 1510/// candidate function whose parameter types match the types of the N arguments. 1511/// 1512/// example: float Z = __builtin_overload(2, X, Y, modf, mod, modl); 1513/// If X and Y are long doubles, Z will assigned the result of modl(X, Y); 1514/// If X and Y are floats, Z will be assigned the result of modf(X, Y); 1515class OverloadExpr : public Expr { 1516 // SubExprs - the list of values passed to the __builtin_overload function. 1517 // SubExpr[0] is a constant expression 1518 // SubExpr[1-N] are the parameters to pass to the matching function call 1519 // SubExpr[N-...] are the candidate functions, of type pointer to function. 1520 Stmt **SubExprs; 1521 1522 // NumExprs - the size of the SubExprs array 1523 unsigned NumExprs; 1524 1525 // The index of the matching candidate function 1526 unsigned FnIndex; 1527 1528 SourceLocation BuiltinLoc; 1529 SourceLocation RParenLoc; 1530public: 1531 OverloadExpr(Expr **args, unsigned nexprs, unsigned idx, QualType t, 1532 SourceLocation bloc, SourceLocation rploc) 1533 : Expr(OverloadExprClass, t), NumExprs(nexprs), FnIndex(idx), 1534 BuiltinLoc(bloc), RParenLoc(rploc) { 1535 SubExprs = new Stmt*[nexprs]; 1536 for (unsigned i = 0; i != nexprs; ++i) 1537 SubExprs[i] = args[i]; 1538 } 1539 ~OverloadExpr() { 1540 delete [] SubExprs; 1541 } 1542 1543 /// arg_begin - Return a pointer to the list of arguments that will be passed 1544 /// to the matching candidate function, skipping over the initial constant 1545 /// expression. 1546 typedef ConstExprIterator const_arg_iterator; 1547 const_arg_iterator arg_begin() const { return &SubExprs[0]+1; } 1548 const_arg_iterator arg_end(ASTContext& Ctx) const { 1549 return &SubExprs[0]+1+getNumArgs(Ctx); 1550 } 1551 1552 /// getNumArgs - Return the number of arguments to pass to the candidate 1553 /// functions. 1554 unsigned getNumArgs(ASTContext &Ctx) const { 1555 return getExpr(0)->getIntegerConstantExprValue(Ctx).getZExtValue(); 1556 } 1557 1558 /// getNumSubExprs - Return the size of the SubExprs array. This includes the 1559 /// constant expression, the actual arguments passed in, and the function 1560 /// pointers. 1561 unsigned getNumSubExprs() const { return NumExprs; } 1562 1563 /// getExpr - Return the Expr at the specified index. 1564 Expr *getExpr(unsigned Index) const { 1565 assert((Index < NumExprs) && "Arg access out of range!"); 1566 return cast<Expr>(SubExprs[Index]); 1567 } 1568 1569 /// getFn - Return the matching candidate function for this OverloadExpr. 1570 Expr *getFn() const { return cast<Expr>(SubExprs[FnIndex]); } 1571 1572 virtual SourceRange getSourceRange() const { 1573 return SourceRange(BuiltinLoc, RParenLoc); 1574 } 1575 static bool classof(const Stmt *T) { 1576 return T->getStmtClass() == OverloadExprClass; 1577 } 1578 static bool classof(const OverloadExpr *) { return true; } 1579 1580 // Iterators 1581 virtual child_iterator child_begin(); 1582 virtual child_iterator child_end(); 1583 1584 virtual void EmitImpl(llvm::Serializer& S) const; 1585 static OverloadExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1586}; 1587 1588/// VAArgExpr, used for the builtin function __builtin_va_start. 1589class VAArgExpr : public Expr { 1590 Stmt *Val; 1591 SourceLocation BuiltinLoc, RParenLoc; 1592public: 1593 VAArgExpr(SourceLocation BLoc, Expr* e, QualType t, SourceLocation RPLoc) 1594 : Expr(VAArgExprClass, t), 1595 Val(e), 1596 BuiltinLoc(BLoc), 1597 RParenLoc(RPLoc) { } 1598 1599 const Expr *getSubExpr() const { return cast<Expr>(Val); } 1600 Expr *getSubExpr() { return cast<Expr>(Val); } 1601 virtual SourceRange getSourceRange() const { 1602 return SourceRange(BuiltinLoc, RParenLoc); 1603 } 1604 static bool classof(const Stmt *T) { 1605 return T->getStmtClass() == VAArgExprClass; 1606 } 1607 static bool classof(const VAArgExpr *) { return true; } 1608 1609 // Iterators 1610 virtual child_iterator child_begin(); 1611 virtual child_iterator child_end(); 1612 1613 virtual void EmitImpl(llvm::Serializer& S) const; 1614 static VAArgExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1615}; 1616 1617/// InitListExpr - used for struct and array initializers, such as: 1618/// struct foo x = { 1, { 2, 3 } }; 1619/// 1620/// Because C is somewhat loose with braces, the AST does not necessarily 1621/// directly model the C source. Instead, the semantic analyzer aims to make 1622/// the InitListExprs match up with the type of the decl being initialized. We 1623/// have the following exceptions: 1624/// 1625/// 1. Elements at the end of the list may be dropped from the initializer. 1626/// These elements are defined to be initialized to zero. For example: 1627/// int x[20] = { 1 }; 1628/// 2. Initializers may have excess initializers which are to be ignored by the 1629/// compiler. For example: 1630/// int x[1] = { 1, 2 }; 1631/// 3. Redundant InitListExprs may be present around scalar elements. These 1632/// always have a single element whose type is the same as the InitListExpr. 1633/// this can only happen for Type::isScalarType() types. 1634/// int x = { 1 }; int y[2] = { {1}, {2} }; 1635/// 1636class InitListExpr : public Expr { 1637 std::vector<Stmt *> InitExprs; 1638 SourceLocation LBraceLoc, RBraceLoc; 1639 1640 /// HadDesignators - Return true if there were any designators in this 1641 /// init list expr. FIXME: this should be replaced by storing the designators 1642 /// somehow and updating codegen. 1643 bool HadDesignators; 1644public: 1645 InitListExpr(SourceLocation lbraceloc, Expr **initexprs, unsigned numinits, 1646 SourceLocation rbraceloc, bool HadDesignators); 1647 1648 unsigned getNumInits() const { return InitExprs.size(); } 1649 bool hadDesignators() const { return HadDesignators; } 1650 1651 const Expr* getInit(unsigned Init) const { 1652 assert(Init < getNumInits() && "Initializer access out of range!"); 1653 return cast<Expr>(InitExprs[Init]); 1654 } 1655 1656 Expr* getInit(unsigned Init) { 1657 assert(Init < getNumInits() && "Initializer access out of range!"); 1658 return cast<Expr>(InitExprs[Init]); 1659 } 1660 1661 void setInit(unsigned Init, Expr *expr) { 1662 assert(Init < getNumInits() && "Initializer access out of range!"); 1663 InitExprs[Init] = expr; 1664 } 1665 1666 // Dynamic removal/addition (for constructing implicit InitExpr's). 1667 void removeInit(unsigned Init) { 1668 InitExprs.erase(InitExprs.begin()+Init); 1669 } 1670 void addInit(unsigned Init, Expr *expr) { 1671 InitExprs.insert(InitExprs.begin()+Init, expr); 1672 } 1673 1674 // Explicit InitListExpr's originate from source code (and have valid source 1675 // locations). Implicit InitListExpr's are created by the semantic analyzer. 1676 bool isExplicit() { 1677 return LBraceLoc.isValid() && RBraceLoc.isValid(); 1678 } 1679 1680 virtual SourceRange getSourceRange() const { 1681 return SourceRange(LBraceLoc, RBraceLoc); 1682 } 1683 static bool classof(const Stmt *T) { 1684 return T->getStmtClass() == InitListExprClass; 1685 } 1686 static bool classof(const InitListExpr *) { return true; } 1687 1688 // Iterators 1689 virtual child_iterator child_begin(); 1690 virtual child_iterator child_end(); 1691 1692 typedef std::vector<Stmt *>::iterator iterator; 1693 typedef std::vector<Stmt *>::reverse_iterator reverse_iterator; 1694 1695 iterator begin() { return InitExprs.begin(); } 1696 iterator end() { return InitExprs.end(); } 1697 reverse_iterator rbegin() { return InitExprs.rbegin(); } 1698 reverse_iterator rend() { return InitExprs.rend(); } 1699 1700 // Serailization. 1701 virtual void EmitImpl(llvm::Serializer& S) const; 1702 static InitListExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1703 1704private: 1705 // Used by serializer. 1706 InitListExpr() : Expr(InitListExprClass, QualType()) {} 1707}; 1708 1709//===----------------------------------------------------------------------===// 1710// Clang Extensions 1711//===----------------------------------------------------------------------===// 1712 1713 1714/// ExtVectorElementExpr - This represents access to specific elements of a 1715/// vector, and may occur on the left hand side or right hand side. For example 1716/// the following is legal: "V.xy = V.zw" if V is a 4 element extended vector. 1717/// 1718class ExtVectorElementExpr : public Expr { 1719 Stmt *Base; 1720 IdentifierInfo &Accessor; 1721 SourceLocation AccessorLoc; 1722public: 1723 ExtVectorElementExpr(QualType ty, Expr *base, IdentifierInfo &accessor, 1724 SourceLocation loc) 1725 : Expr(ExtVectorElementExprClass, ty), 1726 Base(base), Accessor(accessor), AccessorLoc(loc) {} 1727 1728 const Expr *getBase() const { return cast<Expr>(Base); } 1729 Expr *getBase() { return cast<Expr>(Base); } 1730 1731 IdentifierInfo &getAccessor() const { return Accessor; } 1732 1733 /// getNumElements - Get the number of components being selected. 1734 unsigned getNumElements() const; 1735 1736 /// containsDuplicateElements - Return true if any element access is 1737 /// repeated. 1738 bool containsDuplicateElements() const; 1739 1740 /// getEncodedElementAccess - Encode the elements accessed into an llvm 1741 /// aggregate Constant of ConstantInt(s). 1742 void getEncodedElementAccess(llvm::SmallVectorImpl<unsigned> &Elts) const; 1743 1744 virtual SourceRange getSourceRange() const { 1745 return SourceRange(getBase()->getLocStart(), AccessorLoc); 1746 } 1747 1748 static bool classof(const Stmt *T) { 1749 return T->getStmtClass() == ExtVectorElementExprClass; 1750 } 1751 static bool classof(const ExtVectorElementExpr *) { return true; } 1752 1753 // Iterators 1754 virtual child_iterator child_begin(); 1755 virtual child_iterator child_end(); 1756 1757 virtual void EmitImpl(llvm::Serializer& S) const; 1758 static ExtVectorElementExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1759}; 1760 1761 1762/// BlockExpr - Adaptor class for mixing a BlockDecl with expressions. 1763/// ^{ statement-body } or ^(int arg1, float arg2){ statement-body } 1764class BlockExpr : public Expr { 1765protected: 1766 BlockDecl *TheBlock; 1767public: 1768 BlockExpr(BlockDecl *BD, QualType ty) : Expr(BlockExprClass, ty), 1769 TheBlock(BD) {} 1770 1771 BlockDecl *getBlockDecl() { return TheBlock; } 1772 1773 // Convenience functions for probing the underlying BlockDecl. 1774 SourceLocation getCaretLocation() const; 1775 const Stmt *getBody() const; 1776 Stmt *getBody(); 1777 1778 virtual SourceRange getSourceRange() const { 1779 return SourceRange(getCaretLocation(), getBody()->getLocEnd()); 1780 } 1781 1782 /// getFunctionType - Return the underlying function type for this block. 1783 const FunctionType *getFunctionType() const; 1784 1785 static bool classof(const Stmt *T) { 1786 return T->getStmtClass() == BlockExprClass; 1787 } 1788 static bool classof(const BlockExpr *) { return true; } 1789 1790 // Iterators 1791 virtual child_iterator child_begin(); 1792 virtual child_iterator child_end(); 1793 1794 virtual void EmitImpl(llvm::Serializer& S) const; 1795 static BlockExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1796}; 1797 1798/// BlockDeclRefExpr - A reference to a declared variable, function, 1799/// enum, etc. 1800class BlockDeclRefExpr : public Expr { 1801 ValueDecl *D; 1802 SourceLocation Loc; 1803 bool IsByRef; 1804public: 1805 BlockDeclRefExpr(ValueDecl *d, QualType t, SourceLocation l, bool ByRef) : 1806 Expr(BlockDeclRefExprClass, t), D(d), Loc(l), IsByRef(ByRef) {} 1807 1808 ValueDecl *getDecl() { return D; } 1809 const ValueDecl *getDecl() const { return D; } 1810 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 1811 1812 bool isByRef() const { return IsByRef; } 1813 1814 static bool classof(const Stmt *T) { 1815 return T->getStmtClass() == BlockDeclRefExprClass; 1816 } 1817 static bool classof(const BlockDeclRefExpr *) { return true; } 1818 1819 // Iterators 1820 virtual child_iterator child_begin(); 1821 virtual child_iterator child_end(); 1822 1823 virtual void EmitImpl(llvm::Serializer& S) const; 1824 static BlockDeclRefExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1825}; 1826 1827} // end namespace clang 1828 1829#endif 1830