Expr.h revision 833ca991c1bfc967f0995974ca86f66ba1f666b5
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 "llvm/ADT/StringRef.h" 24#include <vector> 25 26namespace clang { 27 class ASTContext; 28 class APValue; 29 class Decl; 30 class IdentifierInfo; 31 class ParmVarDecl; 32 class NamedDecl; 33 class ValueDecl; 34 class BlockDecl; 35 class CXXOperatorCallExpr; 36 class CXXMemberCallExpr; 37 class TemplateArgumentLoc; 38 39/// Expr - This represents one expression. Note that Expr's are subclasses of 40/// Stmt. This allows an expression to be transparently used any place a Stmt 41/// is required. 42/// 43class Expr : public Stmt { 44 QualType TR; 45 46protected: 47 /// TypeDependent - Whether this expression is type-dependent 48 /// (C++ [temp.dep.expr]). 49 bool TypeDependent : 1; 50 51 /// ValueDependent - Whether this expression is value-dependent 52 /// (C++ [temp.dep.constexpr]). 53 bool ValueDependent : 1; 54 55 // FIXME: Eventually, this constructor should go away and we should 56 // require every subclass to provide type/value-dependence 57 // information. 58 Expr(StmtClass SC, QualType T) 59 : Stmt(SC), TypeDependent(false), ValueDependent(false) { 60 setType(T); 61 } 62 63 Expr(StmtClass SC, QualType T, bool TD, bool VD) 64 : Stmt(SC), TypeDependent(TD), ValueDependent(VD) { 65 setType(T); 66 } 67 68 /// \brief Construct an empty expression. 69 explicit Expr(StmtClass SC, EmptyShell) : Stmt(SC) { } 70 71public: 72 /// \brief Increases the reference count for this expression. 73 /// 74 /// Invoke the Retain() operation when this expression 75 /// is being shared by another owner. 76 Expr *Retain() { 77 Stmt::Retain(); 78 return this; 79 } 80 81 QualType getType() const { return TR; } 82 void setType(QualType t) { 83 // In C++, the type of an expression is always adjusted so that it 84 // will not have reference type an expression will never have 85 // reference type (C++ [expr]p6). Use 86 // QualType::getNonReferenceType() to retrieve the non-reference 87 // type. Additionally, inspect Expr::isLvalue to determine whether 88 // an expression that is adjusted in this manner should be 89 // considered an lvalue. 90 assert((TR.isNull() || !TR->isReferenceType()) && 91 "Expressions can't have reference type"); 92 93 TR = t; 94 } 95 96 /// isValueDependent - Determines whether this expression is 97 /// value-dependent (C++ [temp.dep.constexpr]). For example, the 98 /// array bound of "Chars" in the following example is 99 /// value-dependent. 100 /// @code 101 /// template<int Size, char (&Chars)[Size]> struct meta_string; 102 /// @endcode 103 bool isValueDependent() const { return ValueDependent; } 104 105 /// \brief Set whether this expression is value-dependent or not. 106 void setValueDependent(bool VD) { ValueDependent = VD; } 107 108 /// isTypeDependent - Determines whether this expression is 109 /// type-dependent (C++ [temp.dep.expr]), which means that its type 110 /// could change from one template instantiation to the next. For 111 /// example, the expressions "x" and "x + y" are type-dependent in 112 /// the following code, but "y" is not type-dependent: 113 /// @code 114 /// template<typename T> 115 /// void add(T x, int y) { 116 /// x + y; 117 /// } 118 /// @endcode 119 bool isTypeDependent() const { return TypeDependent; } 120 121 /// \brief Set whether this expression is type-dependent or not. 122 void setTypeDependent(bool TD) { TypeDependent = TD; } 123 124 /// SourceLocation tokens are not useful in isolation - they are low level 125 /// value objects created/interpreted by SourceManager. We assume AST 126 /// clients will have a pointer to the respective SourceManager. 127 virtual SourceRange getSourceRange() const = 0; 128 129 /// getExprLoc - Return the preferred location for the arrow when diagnosing 130 /// a problem with a generic expression. 131 virtual SourceLocation getExprLoc() const { return getLocStart(); } 132 133 /// isUnusedResultAWarning - Return true if this immediate expression should 134 /// be warned about if the result is unused. If so, fill in Loc and Ranges 135 /// with location to warn on and the source range[s] to report with the 136 /// warning. 137 bool isUnusedResultAWarning(SourceLocation &Loc, SourceRange &R1, 138 SourceRange &R2) const; 139 140 /// isLvalue - C99 6.3.2.1: an lvalue is an expression with an object type or 141 /// incomplete type other than void. Nonarray expressions that can be lvalues: 142 /// - name, where name must be a variable 143 /// - e[i] 144 /// - (e), where e must be an lvalue 145 /// - e.name, where e must be an lvalue 146 /// - e->name 147 /// - *e, the type of e cannot be a function type 148 /// - string-constant 149 /// - reference type [C++ [expr]] 150 /// - b ? x : y, where x and y are lvalues of suitable types [C++] 151 /// 152 enum isLvalueResult { 153 LV_Valid, 154 LV_NotObjectType, 155 LV_IncompleteVoidType, 156 LV_DuplicateVectorComponents, 157 LV_InvalidExpression, 158 LV_MemberFunction 159 }; 160 isLvalueResult isLvalue(ASTContext &Ctx) const; 161 162 // Same as above, but excluding checks for non-object and void types in C 163 isLvalueResult isLvalueInternal(ASTContext &Ctx) const; 164 165 /// isModifiableLvalue - C99 6.3.2.1: an lvalue that does not have array type, 166 /// does not have an incomplete type, does not have a const-qualified type, 167 /// and if it is a structure or union, does not have any member (including, 168 /// recursively, any member or element of all contained aggregates or unions) 169 /// with a const-qualified type. 170 /// 171 /// \param Loc [in] [out] - A source location which *may* be filled 172 /// in with the location of the expression making this a 173 /// non-modifiable lvalue, if specified. 174 enum isModifiableLvalueResult { 175 MLV_Valid, 176 MLV_NotObjectType, 177 MLV_IncompleteVoidType, 178 MLV_DuplicateVectorComponents, 179 MLV_InvalidExpression, 180 MLV_LValueCast, // Specialized form of MLV_InvalidExpression. 181 MLV_IncompleteType, 182 MLV_ConstQualified, 183 MLV_ArrayType, 184 MLV_NotBlockQualified, 185 MLV_ReadonlyProperty, 186 MLV_NoSetterProperty, 187 MLV_MemberFunction 188 }; 189 isModifiableLvalueResult isModifiableLvalue(ASTContext &Ctx, 190 SourceLocation *Loc = 0) const; 191 192 /// \brief If this expression refers to a bit-field, retrieve the 193 /// declaration of that bit-field. 194 FieldDecl *getBitField(); 195 196 const FieldDecl *getBitField() const { 197 return const_cast<Expr*>(this)->getBitField(); 198 } 199 200 /// isIntegerConstantExpr - Return true if this expression is a valid integer 201 /// constant expression, and, if so, return its value in Result. If not a 202 /// valid i-c-e, return false and fill in Loc (if specified) with the location 203 /// of the invalid expression. 204 bool isIntegerConstantExpr(llvm::APSInt &Result, ASTContext &Ctx, 205 SourceLocation *Loc = 0, 206 bool isEvaluated = true) const; 207 bool isIntegerConstantExpr(ASTContext &Ctx, SourceLocation *Loc = 0) const { 208 llvm::APSInt X; 209 return isIntegerConstantExpr(X, Ctx, Loc); 210 } 211 /// isConstantInitializer - Returns true if this expression is a constant 212 /// initializer, which can be emitted at compile-time. 213 bool isConstantInitializer(ASTContext &Ctx) const; 214 215 /// EvalResult is a struct with detailed info about an evaluated expression. 216 struct EvalResult { 217 /// Val - This is the value the expression can be folded to. 218 APValue Val; 219 220 /// HasSideEffects - Whether the evaluated expression has side effects. 221 /// For example, (f() && 0) can be folded, but it still has side effects. 222 bool HasSideEffects; 223 224 /// Diag - If the expression is unfoldable, then Diag contains a note 225 /// diagnostic indicating why it's not foldable. DiagLoc indicates a caret 226 /// position for the error, and DiagExpr is the expression that caused 227 /// the error. 228 /// If the expression is foldable, but not an integer constant expression, 229 /// Diag contains a note diagnostic that describes why it isn't an integer 230 /// constant expression. If the expression *is* an integer constant 231 /// expression, then Diag will be zero. 232 unsigned Diag; 233 const Expr *DiagExpr; 234 SourceLocation DiagLoc; 235 236 EvalResult() : HasSideEffects(false), Diag(0), DiagExpr(0) {} 237 }; 238 239 /// Evaluate - Return true if this is a constant which we can fold using 240 /// any crazy technique (that has nothing to do with language standards) that 241 /// we want to. If this function returns true, it returns the folded constant 242 /// in Result. 243 bool Evaluate(EvalResult &Result, ASTContext &Ctx) const; 244 245 /// EvaluateAsAny - The same as Evaluate, except that it also succeeds on 246 /// stack based objects. 247 bool EvaluateAsAny(EvalResult &Result, ASTContext &Ctx) const; 248 249 /// isEvaluatable - Call Evaluate to see if this expression can be constant 250 /// folded, but discard the result. 251 bool isEvaluatable(ASTContext &Ctx) const; 252 253 /// EvaluateAsInt - Call Evaluate and return the folded integer. This 254 /// must be called on an expression that constant folds to an integer. 255 llvm::APSInt EvaluateAsInt(ASTContext &Ctx) const; 256 257 /// EvaluateAsLValue - Evaluate an expression to see if it's a lvalue 258 /// with link time known address. 259 bool EvaluateAsLValue(EvalResult &Result, ASTContext &Ctx) const; 260 261 /// EvaluateAsAnyLValue - The same as EvaluateAsLValue, except that it 262 /// also succeeds on stack based, immutable address lvalues. 263 bool EvaluateAsAnyLValue(EvalResult &Result, ASTContext &Ctx) const; 264 265 /// \brief Enumeration used to describe how \c isNullPointerConstant() 266 /// should cope with value-dependent expressions. 267 enum NullPointerConstantValueDependence { 268 /// \brief Specifies that the expression should never be value-dependent. 269 NPC_NeverValueDependent = 0, 270 271 /// \brief Specifies that a value-dependent expression of integral or 272 /// dependent type should be considered a null pointer constant. 273 NPC_ValueDependentIsNull, 274 275 /// \brief Specifies that a value-dependent expression should be considered 276 /// to never be a null pointer constant. 277 NPC_ValueDependentIsNotNull 278 }; 279 280 /// isNullPointerConstant - C99 6.3.2.3p3 - Return true if this is either an 281 /// integer constant expression with the value zero, or if this is one that is 282 /// cast to void*. 283 bool isNullPointerConstant(ASTContext &Ctx, 284 NullPointerConstantValueDependence NPC) const; 285 286 /// isOBJCGCCandidate - Return true if this expression may be used in a read/ 287 /// write barrier. 288 bool isOBJCGCCandidate(ASTContext &Ctx) const; 289 290 /// IgnoreParens - Ignore parentheses. If this Expr is a ParenExpr, return 291 /// its subexpression. If that subexpression is also a ParenExpr, 292 /// then this method recursively returns its subexpression, and so forth. 293 /// Otherwise, the method returns the current Expr. 294 Expr* IgnoreParens(); 295 296 /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr 297 /// or CastExprs, returning their operand. 298 Expr *IgnoreParenCasts(); 299 300 /// IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the 301 /// value (including ptr->int casts of the same size). Strip off any 302 /// ParenExpr or CastExprs, returning their operand. 303 Expr *IgnoreParenNoopCasts(ASTContext &Ctx); 304 305 const Expr* IgnoreParens() const { 306 return const_cast<Expr*>(this)->IgnoreParens(); 307 } 308 const Expr *IgnoreParenCasts() const { 309 return const_cast<Expr*>(this)->IgnoreParenCasts(); 310 } 311 const Expr *IgnoreParenNoopCasts(ASTContext &Ctx) const { 312 return const_cast<Expr*>(this)->IgnoreParenNoopCasts(Ctx); 313 } 314 315 static bool hasAnyTypeDependentArguments(Expr** Exprs, unsigned NumExprs); 316 static bool hasAnyValueDependentArguments(Expr** Exprs, unsigned NumExprs); 317 318 static bool classof(const Stmt *T) { 319 return T->getStmtClass() >= firstExprConstant && 320 T->getStmtClass() <= lastExprConstant; 321 } 322 static bool classof(const Expr *) { return true; } 323}; 324 325 326//===----------------------------------------------------------------------===// 327// Primary Expressions. 328//===----------------------------------------------------------------------===// 329 330/// \brief Represents the qualifier that may precede a C++ name, e.g., the 331/// "std::" in "std::sort". 332struct NameQualifier { 333 /// \brief The nested name specifier. 334 NestedNameSpecifier *NNS; 335 336 /// \brief The source range covered by the nested name specifier. 337 SourceRange Range; 338}; 339 340/// \brief Represents an explicit template argument list in C++, e.g., 341/// the "<int>" in "sort<int>". 342struct ExplicitTemplateArgumentList { 343 /// \brief The source location of the left angle bracket ('<'); 344 SourceLocation LAngleLoc; 345 346 /// \brief The source location of the right angle bracket ('>'); 347 SourceLocation RAngleLoc; 348 349 /// \brief The number of template arguments in TemplateArgs. 350 /// The actual template arguments (if any) are stored after the 351 /// ExplicitTemplateArgumentList structure. 352 unsigned NumTemplateArgs; 353 354 /// \brief Retrieve the template arguments 355 TemplateArgumentLoc *getTemplateArgs() { 356 return reinterpret_cast<TemplateArgumentLoc *> (this + 1); 357 } 358 359 /// \brief Retrieve the template arguments 360 const TemplateArgumentLoc *getTemplateArgs() const { 361 return reinterpret_cast<const TemplateArgumentLoc *> (this + 1); 362 } 363}; 364 365/// DeclRefExpr - [C99 6.5.1p2] - A reference to a declared variable, function, 366/// enum, etc. 367class DeclRefExpr : public Expr { 368 enum { 369 // Flag on DecoratedD that specifies when this declaration reference 370 // expression has a C++ nested-name-specifier. 371 HasQualifierFlag = 0x01, 372 // Flag on DecoratedD that specifies when this declaration reference 373 // expression has an explicit C++ template argument list. 374 HasExplicitTemplateArgumentListFlag = 0x02 375 }; 376 377 // DecoratedD - The declaration that we are referencing, plus two bits to 378 // indicate whether (1) the declaration's name was explicitly qualified and 379 // (2) the declaration's name was followed by an explicit template 380 // argument list. 381 llvm::PointerIntPair<NamedDecl *, 2> DecoratedD; 382 383 // Loc - The location of the declaration name itself. 384 SourceLocation Loc; 385 386 /// \brief Retrieve the qualifier that preceded the declaration name, if any. 387 NameQualifier *getNameQualifier() { 388 if ((DecoratedD.getInt() & HasQualifierFlag) == 0) 389 return 0; 390 391 return reinterpret_cast<NameQualifier *> (this + 1); 392 } 393 394 /// \brief Retrieve the qualifier that preceded the member name, if any. 395 const NameQualifier *getNameQualifier() const { 396 return const_cast<DeclRefExpr *>(this)->getNameQualifier(); 397 } 398 399 /// \brief Retrieve the explicit template argument list that followed the 400 /// member template name, if any. 401 ExplicitTemplateArgumentList *getExplicitTemplateArgumentList() { 402 if ((DecoratedD.getInt() & HasExplicitTemplateArgumentListFlag) == 0) 403 return 0; 404 405 if ((DecoratedD.getInt() & HasQualifierFlag) == 0) 406 return reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 407 408 return reinterpret_cast<ExplicitTemplateArgumentList *>( 409 getNameQualifier() + 1); 410 } 411 412 /// \brief Retrieve the explicit template argument list that followed the 413 /// member template name, if any. 414 const ExplicitTemplateArgumentList *getExplicitTemplateArgumentList() const { 415 return const_cast<DeclRefExpr *>(this)->getExplicitTemplateArgumentList(); 416 } 417 418 DeclRefExpr(NestedNameSpecifier *Qualifier, SourceRange QualifierRange, 419 NamedDecl *D, SourceLocation NameLoc, 420 bool HasExplicitTemplateArgumentList, 421 SourceLocation LAngleLoc, 422 const TemplateArgumentLoc *ExplicitTemplateArgs, 423 unsigned NumExplicitTemplateArgs, 424 SourceLocation RAngleLoc, 425 QualType T, bool TD, bool VD); 426 427protected: 428 // FIXME: Eventually, this constructor will go away and all subclasses 429 // will have to provide the type- and value-dependent flags. 430 DeclRefExpr(StmtClass SC, NamedDecl *d, QualType t, SourceLocation l) : 431 Expr(SC, t), DecoratedD(d, 0), Loc(l) {} 432 433 DeclRefExpr(StmtClass SC, NamedDecl *d, QualType t, SourceLocation l, bool TD, 434 bool VD) : 435 Expr(SC, t, TD, VD), DecoratedD(d, 0), Loc(l) {} 436 437public: 438 // FIXME: Eventually, this constructor will go away and all clients 439 // will have to provide the type- and value-dependent flags. 440 DeclRefExpr(NamedDecl *d, QualType t, SourceLocation l) : 441 Expr(DeclRefExprClass, t), DecoratedD(d, 0), Loc(l) {} 442 443 DeclRefExpr(NamedDecl *d, QualType t, SourceLocation l, bool TD, bool VD) : 444 Expr(DeclRefExprClass, t, TD, VD), DecoratedD(d, 0), Loc(l) {} 445 446 /// \brief Construct an empty declaration reference expression. 447 explicit DeclRefExpr(EmptyShell Empty) 448 : Expr(DeclRefExprClass, Empty) { } 449 450 static DeclRefExpr *Create(ASTContext &Context, 451 NestedNameSpecifier *Qualifier, 452 SourceRange QualifierRange, 453 NamedDecl *D, 454 SourceLocation NameLoc, 455 QualType T, bool TD, bool VD); 456 457 static DeclRefExpr *Create(ASTContext &Context, 458 NestedNameSpecifier *Qualifier, 459 SourceRange QualifierRange, 460 NamedDecl *D, 461 SourceLocation NameLoc, 462 bool HasExplicitTemplateArgumentList, 463 SourceLocation LAngleLoc, 464 const TemplateArgumentLoc *ExplicitTemplateArgs, 465 unsigned NumExplicitTemplateArgs, 466 SourceLocation RAngleLoc, 467 QualType T, bool TD, bool VD); 468 469 NamedDecl *getDecl() { return DecoratedD.getPointer(); } 470 const NamedDecl *getDecl() const { return DecoratedD.getPointer(); } 471 void setDecl(NamedDecl *NewD) { DecoratedD.setPointer(NewD); } 472 473 SourceLocation getLocation() const { return Loc; } 474 void setLocation(SourceLocation L) { Loc = L; } 475 virtual SourceRange getSourceRange() const; 476 477 /// \brief Determine whether this declaration reference was preceded by a 478 /// C++ nested-name-specifier, e.g., \c N::foo. 479 bool hasQualifier() const { return DecoratedD.getInt() & HasQualifierFlag; } 480 481 /// \brief If the name was qualified, retrieves the source range of 482 /// the nested-name-specifier that precedes the name. Otherwise, 483 /// returns an empty source range. 484 SourceRange getQualifierRange() const { 485 if (!hasQualifier()) 486 return SourceRange(); 487 488 return getNameQualifier()->Range; 489 } 490 491 /// \brief If the name was qualified, retrieves the nested-name-specifier 492 /// that precedes the name. Otherwise, returns NULL. 493 NestedNameSpecifier *getQualifier() const { 494 if (!hasQualifier()) 495 return 0; 496 497 return getNameQualifier()->NNS; 498 } 499 500 /// \brief Determines whether this member expression actually had a C++ 501 /// template argument list explicitly specified, e.g., x.f<int>. 502 bool hasExplicitTemplateArgumentList() const { 503 return DecoratedD.getInt() & HasExplicitTemplateArgumentListFlag; 504 } 505 506 /// \brief Retrieve the location of the left angle bracket following the 507 /// member name ('<'), if any. 508 SourceLocation getLAngleLoc() const { 509 if (!hasExplicitTemplateArgumentList()) 510 return SourceLocation(); 511 512 return getExplicitTemplateArgumentList()->LAngleLoc; 513 } 514 515 /// \brief Retrieve the template arguments provided as part of this 516 /// template-id. 517 const TemplateArgumentLoc *getTemplateArgs() const { 518 if (!hasExplicitTemplateArgumentList()) 519 return 0; 520 521 return getExplicitTemplateArgumentList()->getTemplateArgs(); 522 } 523 524 /// \brief Retrieve the number of template arguments provided as part of this 525 /// template-id. 526 unsigned getNumTemplateArgs() const { 527 if (!hasExplicitTemplateArgumentList()) 528 return 0; 529 530 return getExplicitTemplateArgumentList()->NumTemplateArgs; 531 } 532 533 /// \brief Retrieve the location of the right angle bracket following the 534 /// template arguments ('>'). 535 SourceLocation getRAngleLoc() const { 536 if (!hasExplicitTemplateArgumentList()) 537 return SourceLocation(); 538 539 return getExplicitTemplateArgumentList()->RAngleLoc; 540 } 541 542 static bool classof(const Stmt *T) { 543 return T->getStmtClass() == DeclRefExprClass || 544 T->getStmtClass() == CXXConditionDeclExprClass; 545 } 546 static bool classof(const DeclRefExpr *) { return true; } 547 548 // Iterators 549 virtual child_iterator child_begin(); 550 virtual child_iterator child_end(); 551}; 552 553/// PredefinedExpr - [C99 6.4.2.2] - A predefined identifier such as __func__. 554class PredefinedExpr : public Expr { 555public: 556 enum IdentType { 557 Func, 558 Function, 559 PrettyFunction 560 }; 561 562private: 563 SourceLocation Loc; 564 IdentType Type; 565public: 566 PredefinedExpr(SourceLocation l, QualType type, IdentType IT) 567 : Expr(PredefinedExprClass, type, type->isDependentType(), 568 type->isDependentType()), Loc(l), Type(IT) {} 569 570 /// \brief Construct an empty predefined expression. 571 explicit PredefinedExpr(EmptyShell Empty) 572 : Expr(PredefinedExprClass, Empty) { } 573 574 IdentType getIdentType() const { return Type; } 575 void setIdentType(IdentType IT) { Type = IT; } 576 577 SourceLocation getLocation() const { return Loc; } 578 void setLocation(SourceLocation L) { Loc = L; } 579 580 static std::string ComputeName(ASTContext &Context, IdentType IT, 581 const Decl *CurrentDecl); 582 583 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 584 585 static bool classof(const Stmt *T) { 586 return T->getStmtClass() == PredefinedExprClass; 587 } 588 static bool classof(const PredefinedExpr *) { return true; } 589 590 // Iterators 591 virtual child_iterator child_begin(); 592 virtual child_iterator child_end(); 593}; 594 595class IntegerLiteral : public Expr { 596 llvm::APInt Value; 597 SourceLocation Loc; 598public: 599 // type should be IntTy, LongTy, LongLongTy, UnsignedIntTy, UnsignedLongTy, 600 // or UnsignedLongLongTy 601 IntegerLiteral(const llvm::APInt &V, QualType type, SourceLocation l) 602 : Expr(IntegerLiteralClass, type), Value(V), Loc(l) { 603 assert(type->isIntegerType() && "Illegal type in IntegerLiteral"); 604 } 605 606 /// \brief Construct an empty integer literal. 607 explicit IntegerLiteral(EmptyShell Empty) 608 : Expr(IntegerLiteralClass, Empty) { } 609 610 const llvm::APInt &getValue() const { return Value; } 611 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 612 613 /// \brief Retrieve the location of the literal. 614 SourceLocation getLocation() const { return Loc; } 615 616 void setValue(const llvm::APInt &Val) { Value = Val; } 617 void setLocation(SourceLocation Location) { Loc = Location; } 618 619 static bool classof(const Stmt *T) { 620 return T->getStmtClass() == IntegerLiteralClass; 621 } 622 static bool classof(const IntegerLiteral *) { return true; } 623 624 // Iterators 625 virtual child_iterator child_begin(); 626 virtual child_iterator child_end(); 627}; 628 629class CharacterLiteral : public Expr { 630 unsigned Value; 631 SourceLocation Loc; 632 bool IsWide; 633public: 634 // type should be IntTy 635 CharacterLiteral(unsigned value, bool iswide, QualType type, SourceLocation l) 636 : Expr(CharacterLiteralClass, type), Value(value), Loc(l), IsWide(iswide) { 637 } 638 639 /// \brief Construct an empty character literal. 640 CharacterLiteral(EmptyShell Empty) : Expr(CharacterLiteralClass, Empty) { } 641 642 SourceLocation getLocation() const { return Loc; } 643 bool isWide() const { return IsWide; } 644 645 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 646 647 unsigned getValue() const { return Value; } 648 649 void setLocation(SourceLocation Location) { Loc = Location; } 650 void setWide(bool W) { IsWide = W; } 651 void setValue(unsigned Val) { Value = Val; } 652 653 static bool classof(const Stmt *T) { 654 return T->getStmtClass() == CharacterLiteralClass; 655 } 656 static bool classof(const CharacterLiteral *) { return true; } 657 658 // Iterators 659 virtual child_iterator child_begin(); 660 virtual child_iterator child_end(); 661}; 662 663class FloatingLiteral : public Expr { 664 llvm::APFloat Value; 665 bool IsExact : 1; 666 SourceLocation Loc; 667public: 668 FloatingLiteral(const llvm::APFloat &V, bool isexact, 669 QualType Type, SourceLocation L) 670 : Expr(FloatingLiteralClass, Type), Value(V), IsExact(isexact), Loc(L) {} 671 672 /// \brief Construct an empty floating-point literal. 673 explicit FloatingLiteral(EmptyShell Empty) 674 : Expr(FloatingLiteralClass, Empty), Value(0.0) { } 675 676 const llvm::APFloat &getValue() const { return Value; } 677 void setValue(const llvm::APFloat &Val) { Value = Val; } 678 679 bool isExact() const { return IsExact; } 680 void setExact(bool E) { IsExact = E; } 681 682 /// getValueAsApproximateDouble - This returns the value as an inaccurate 683 /// double. Note that this may cause loss of precision, but is useful for 684 /// debugging dumps, etc. 685 double getValueAsApproximateDouble() const; 686 687 SourceLocation getLocation() const { return Loc; } 688 void setLocation(SourceLocation L) { Loc = L; } 689 690 // FIXME: The logic for computing the value of a predefined expr should go 691 // into a method here that takes the inner-most code decl (a block, function 692 // or objc method) that the expr lives in. This would allow sema and codegen 693 // to be consistent for things like sizeof(__func__) etc. 694 695 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 696 697 static bool classof(const Stmt *T) { 698 return T->getStmtClass() == FloatingLiteralClass; 699 } 700 static bool classof(const FloatingLiteral *) { return true; } 701 702 // Iterators 703 virtual child_iterator child_begin(); 704 virtual child_iterator child_end(); 705}; 706 707/// ImaginaryLiteral - We support imaginary integer and floating point literals, 708/// like "1.0i". We represent these as a wrapper around FloatingLiteral and 709/// IntegerLiteral classes. Instances of this class always have a Complex type 710/// whose element type matches the subexpression. 711/// 712class ImaginaryLiteral : public Expr { 713 Stmt *Val; 714public: 715 ImaginaryLiteral(Expr *val, QualType Ty) 716 : Expr(ImaginaryLiteralClass, Ty), Val(val) {} 717 718 /// \brief Build an empty imaginary literal. 719 explicit ImaginaryLiteral(EmptyShell Empty) 720 : Expr(ImaginaryLiteralClass, Empty) { } 721 722 const Expr *getSubExpr() const { return cast<Expr>(Val); } 723 Expr *getSubExpr() { return cast<Expr>(Val); } 724 void setSubExpr(Expr *E) { Val = E; } 725 726 virtual SourceRange getSourceRange() const { return Val->getSourceRange(); } 727 static bool classof(const Stmt *T) { 728 return T->getStmtClass() == ImaginaryLiteralClass; 729 } 730 static bool classof(const ImaginaryLiteral *) { return true; } 731 732 // Iterators 733 virtual child_iterator child_begin(); 734 virtual child_iterator child_end(); 735}; 736 737/// StringLiteral - This represents a string literal expression, e.g. "foo" 738/// or L"bar" (wide strings). The actual string is returned by getStrData() 739/// is NOT null-terminated, and the length of the string is determined by 740/// calling getByteLength(). The C type for a string is always a 741/// ConstantArrayType. In C++, the char type is const qualified, in C it is 742/// not. 743/// 744/// Note that strings in C can be formed by concatenation of multiple string 745/// literal pptokens in translation phase #6. This keeps track of the locations 746/// of each of these pieces. 747/// 748/// Strings in C can also be truncated and extended by assigning into arrays, 749/// e.g. with constructs like: 750/// char X[2] = "foobar"; 751/// In this case, getByteLength() will return 6, but the string literal will 752/// have type "char[2]". 753class StringLiteral : public Expr { 754 const char *StrData; 755 unsigned ByteLength; 756 bool IsWide; 757 unsigned NumConcatenated; 758 SourceLocation TokLocs[1]; 759 760 StringLiteral(QualType Ty) : Expr(StringLiteralClass, Ty) {} 761 762protected: 763 virtual void DoDestroy(ASTContext &C); 764 765public: 766 /// This is the "fully general" constructor that allows representation of 767 /// strings formed from multiple concatenated tokens. 768 static StringLiteral *Create(ASTContext &C, const char *StrData, 769 unsigned ByteLength, bool Wide, QualType Ty, 770 const SourceLocation *Loc, unsigned NumStrs); 771 772 /// Simple constructor for string literals made from one token. 773 static StringLiteral *Create(ASTContext &C, const char *StrData, 774 unsigned ByteLength, 775 bool Wide, QualType Ty, SourceLocation Loc) { 776 return Create(C, StrData, ByteLength, Wide, Ty, &Loc, 1); 777 } 778 779 /// \brief Construct an empty string literal. 780 static StringLiteral *CreateEmpty(ASTContext &C, unsigned NumStrs); 781 782 llvm::StringRef getString() const { 783 return llvm::StringRef(StrData, ByteLength); 784 } 785 // FIXME: These are deprecated, replace with StringRef. 786 const char *getStrData() const { return StrData; } 787 unsigned getByteLength() const { return ByteLength; } 788 789 /// \brief Sets the string data to the given string data. 790 void setString(ASTContext &C, llvm::StringRef Str); 791 792 bool isWide() const { return IsWide; } 793 void setWide(bool W) { IsWide = W; } 794 795 bool containsNonAsciiOrNull() const { 796 llvm::StringRef Str = getString(); 797 for (unsigned i = 0, e = Str.size(); i != e; ++i) 798 if (!isascii(Str[i]) || !Str[i]) 799 return true; 800 return false; 801 } 802 /// getNumConcatenated - Get the number of string literal tokens that were 803 /// concatenated in translation phase #6 to form this string literal. 804 unsigned getNumConcatenated() const { return NumConcatenated; } 805 806 SourceLocation getStrTokenLoc(unsigned TokNum) const { 807 assert(TokNum < NumConcatenated && "Invalid tok number"); 808 return TokLocs[TokNum]; 809 } 810 void setStrTokenLoc(unsigned TokNum, SourceLocation L) { 811 assert(TokNum < NumConcatenated && "Invalid tok number"); 812 TokLocs[TokNum] = L; 813 } 814 815 typedef const SourceLocation *tokloc_iterator; 816 tokloc_iterator tokloc_begin() const { return TokLocs; } 817 tokloc_iterator tokloc_end() const { return TokLocs+NumConcatenated; } 818 819 virtual SourceRange getSourceRange() const { 820 return SourceRange(TokLocs[0], TokLocs[NumConcatenated-1]); 821 } 822 static bool classof(const Stmt *T) { 823 return T->getStmtClass() == StringLiteralClass; 824 } 825 static bool classof(const StringLiteral *) { return true; } 826 827 // Iterators 828 virtual child_iterator child_begin(); 829 virtual child_iterator child_end(); 830}; 831 832/// ParenExpr - This represents a parethesized expression, e.g. "(1)". This 833/// AST node is only formed if full location information is requested. 834class ParenExpr : public Expr { 835 SourceLocation L, R; 836 Stmt *Val; 837public: 838 ParenExpr(SourceLocation l, SourceLocation r, Expr *val) 839 : Expr(ParenExprClass, val->getType(), 840 val->isTypeDependent(), val->isValueDependent()), 841 L(l), R(r), Val(val) {} 842 843 /// \brief Construct an empty parenthesized expression. 844 explicit ParenExpr(EmptyShell Empty) 845 : Expr(ParenExprClass, Empty) { } 846 847 const Expr *getSubExpr() const { return cast<Expr>(Val); } 848 Expr *getSubExpr() { return cast<Expr>(Val); } 849 void setSubExpr(Expr *E) { Val = E; } 850 851 virtual SourceRange getSourceRange() const { return SourceRange(L, R); } 852 853 /// \brief Get the location of the left parentheses '('. 854 SourceLocation getLParen() const { return L; } 855 void setLParen(SourceLocation Loc) { L = Loc; } 856 857 /// \brief Get the location of the right parentheses ')'. 858 SourceLocation getRParen() const { return R; } 859 void setRParen(SourceLocation Loc) { R = Loc; } 860 861 static bool classof(const Stmt *T) { 862 return T->getStmtClass() == ParenExprClass; 863 } 864 static bool classof(const ParenExpr *) { return true; } 865 866 // Iterators 867 virtual child_iterator child_begin(); 868 virtual child_iterator child_end(); 869}; 870 871 872/// UnaryOperator - This represents the unary-expression's (except sizeof and 873/// alignof), the postinc/postdec operators from postfix-expression, and various 874/// extensions. 875/// 876/// Notes on various nodes: 877/// 878/// Real/Imag - These return the real/imag part of a complex operand. If 879/// applied to a non-complex value, the former returns its operand and the 880/// later returns zero in the type of the operand. 881/// 882/// __builtin_offsetof(type, a.b[10]) is represented as a unary operator whose 883/// subexpression is a compound literal with the various MemberExpr and 884/// ArraySubscriptExpr's applied to it. 885/// 886class UnaryOperator : public Expr { 887public: 888 // Note that additions to this should also update the StmtVisitor class. 889 enum Opcode { 890 PostInc, PostDec, // [C99 6.5.2.4] Postfix increment and decrement operators 891 PreInc, PreDec, // [C99 6.5.3.1] Prefix increment and decrement operators. 892 AddrOf, Deref, // [C99 6.5.3.2] Address and indirection operators. 893 Plus, Minus, // [C99 6.5.3.3] Unary arithmetic operators. 894 Not, LNot, // [C99 6.5.3.3] Unary arithmetic operators. 895 Real, Imag, // "__real expr"/"__imag expr" Extension. 896 Extension, // __extension__ marker. 897 OffsetOf // __builtin_offsetof 898 }; 899private: 900 Stmt *Val; 901 Opcode Opc; 902 SourceLocation Loc; 903public: 904 905 UnaryOperator(Expr *input, Opcode opc, QualType type, SourceLocation l) 906 : Expr(UnaryOperatorClass, type, 907 input->isTypeDependent() && opc != OffsetOf, 908 input->isValueDependent()), 909 Val(input), Opc(opc), Loc(l) {} 910 911 /// \brief Build an empty unary operator. 912 explicit UnaryOperator(EmptyShell Empty) 913 : Expr(UnaryOperatorClass, Empty), Opc(AddrOf) { } 914 915 Opcode getOpcode() const { return Opc; } 916 void setOpcode(Opcode O) { Opc = O; } 917 918 Expr *getSubExpr() const { return cast<Expr>(Val); } 919 void setSubExpr(Expr *E) { Val = E; } 920 921 /// getOperatorLoc - Return the location of the operator. 922 SourceLocation getOperatorLoc() const { return Loc; } 923 void setOperatorLoc(SourceLocation L) { Loc = L; } 924 925 /// isPostfix - Return true if this is a postfix operation, like x++. 926 static bool isPostfix(Opcode Op) { 927 return Op == PostInc || Op == PostDec; 928 } 929 930 /// isPostfix - Return true if this is a prefix operation, like --x. 931 static bool isPrefix(Opcode Op) { 932 return Op == PreInc || Op == PreDec; 933 } 934 935 bool isPrefix() const { return isPrefix(Opc); } 936 bool isPostfix() const { return isPostfix(Opc); } 937 bool isIncrementOp() const {return Opc==PreInc || Opc==PostInc; } 938 bool isIncrementDecrementOp() const { return Opc>=PostInc && Opc<=PreDec; } 939 bool isOffsetOfOp() const { return Opc == OffsetOf; } 940 static bool isArithmeticOp(Opcode Op) { return Op >= Plus && Op <= LNot; } 941 bool isArithmeticOp() const { return isArithmeticOp(Opc); } 942 943 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 944 /// corresponds to, e.g. "sizeof" or "[pre]++" 945 static const char *getOpcodeStr(Opcode Op); 946 947 /// \brief Retrieve the unary opcode that corresponds to the given 948 /// overloaded operator. 949 static Opcode getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix); 950 951 /// \brief Retrieve the overloaded operator kind that corresponds to 952 /// the given unary opcode. 953 static OverloadedOperatorKind getOverloadedOperator(Opcode Opc); 954 955 virtual SourceRange getSourceRange() const { 956 if (isPostfix()) 957 return SourceRange(Val->getLocStart(), Loc); 958 else 959 return SourceRange(Loc, Val->getLocEnd()); 960 } 961 virtual SourceLocation getExprLoc() const { return Loc; } 962 963 static bool classof(const Stmt *T) { 964 return T->getStmtClass() == UnaryOperatorClass; 965 } 966 static bool classof(const UnaryOperator *) { return true; } 967 968 // Iterators 969 virtual child_iterator child_begin(); 970 virtual child_iterator child_end(); 971}; 972 973/// SizeOfAlignOfExpr - [C99 6.5.3.4] - This is for sizeof/alignof, both of 974/// types and expressions. 975class SizeOfAlignOfExpr : public Expr { 976 bool isSizeof : 1; // true if sizeof, false if alignof. 977 bool isType : 1; // true if operand is a type, false if an expression 978 union { 979 void *Ty; 980 Stmt *Ex; 981 } Argument; 982 SourceLocation OpLoc, RParenLoc; 983 984protected: 985 virtual void DoDestroy(ASTContext& C); 986 987public: 988 SizeOfAlignOfExpr(bool issizeof, QualType T, 989 QualType resultType, SourceLocation op, 990 SourceLocation rp) : 991 Expr(SizeOfAlignOfExprClass, resultType, 992 false, // Never type-dependent (C++ [temp.dep.expr]p3). 993 // Value-dependent if the argument is type-dependent. 994 T->isDependentType()), 995 isSizeof(issizeof), isType(true), OpLoc(op), RParenLoc(rp) { 996 Argument.Ty = T.getAsOpaquePtr(); 997 } 998 999 SizeOfAlignOfExpr(bool issizeof, Expr *E, 1000 QualType resultType, SourceLocation op, 1001 SourceLocation rp) : 1002 Expr(SizeOfAlignOfExprClass, resultType, 1003 false, // Never type-dependent (C++ [temp.dep.expr]p3). 1004 // Value-dependent if the argument is type-dependent. 1005 E->isTypeDependent()), 1006 isSizeof(issizeof), isType(false), OpLoc(op), RParenLoc(rp) { 1007 Argument.Ex = E; 1008 } 1009 1010 /// \brief Construct an empty sizeof/alignof expression. 1011 explicit SizeOfAlignOfExpr(EmptyShell Empty) 1012 : Expr(SizeOfAlignOfExprClass, Empty) { } 1013 1014 bool isSizeOf() const { return isSizeof; } 1015 void setSizeof(bool S) { isSizeof = S; } 1016 1017 bool isArgumentType() const { return isType; } 1018 QualType getArgumentType() const { 1019 assert(isArgumentType() && "calling getArgumentType() when arg is expr"); 1020 return QualType::getFromOpaquePtr(Argument.Ty); 1021 } 1022 Expr *getArgumentExpr() { 1023 assert(!isArgumentType() && "calling getArgumentExpr() when arg is type"); 1024 return static_cast<Expr*>(Argument.Ex); 1025 } 1026 const Expr *getArgumentExpr() const { 1027 return const_cast<SizeOfAlignOfExpr*>(this)->getArgumentExpr(); 1028 } 1029 1030 void setArgument(Expr *E) { Argument.Ex = E; isType = false; } 1031 void setArgument(QualType T) { 1032 Argument.Ty = T.getAsOpaquePtr(); 1033 isType = true; 1034 } 1035 1036 /// Gets the argument type, or the type of the argument expression, whichever 1037 /// is appropriate. 1038 QualType getTypeOfArgument() const { 1039 return isArgumentType() ? getArgumentType() : getArgumentExpr()->getType(); 1040 } 1041 1042 SourceLocation getOperatorLoc() const { return OpLoc; } 1043 void setOperatorLoc(SourceLocation L) { OpLoc = L; } 1044 1045 SourceLocation getRParenLoc() const { return RParenLoc; } 1046 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1047 1048 virtual SourceRange getSourceRange() const { 1049 return SourceRange(OpLoc, RParenLoc); 1050 } 1051 1052 static bool classof(const Stmt *T) { 1053 return T->getStmtClass() == SizeOfAlignOfExprClass; 1054 } 1055 static bool classof(const SizeOfAlignOfExpr *) { return true; } 1056 1057 // Iterators 1058 virtual child_iterator child_begin(); 1059 virtual child_iterator child_end(); 1060}; 1061 1062//===----------------------------------------------------------------------===// 1063// Postfix Operators. 1064//===----------------------------------------------------------------------===// 1065 1066/// ArraySubscriptExpr - [C99 6.5.2.1] Array Subscripting. 1067class ArraySubscriptExpr : public Expr { 1068 enum { LHS, RHS, END_EXPR=2 }; 1069 Stmt* SubExprs[END_EXPR]; 1070 SourceLocation RBracketLoc; 1071public: 1072 ArraySubscriptExpr(Expr *lhs, Expr *rhs, QualType t, 1073 SourceLocation rbracketloc) 1074 : Expr(ArraySubscriptExprClass, t, 1075 lhs->isTypeDependent() || rhs->isTypeDependent(), 1076 lhs->isValueDependent() || rhs->isValueDependent()), 1077 RBracketLoc(rbracketloc) { 1078 SubExprs[LHS] = lhs; 1079 SubExprs[RHS] = rhs; 1080 } 1081 1082 /// \brief Create an empty array subscript expression. 1083 explicit ArraySubscriptExpr(EmptyShell Shell) 1084 : Expr(ArraySubscriptExprClass, Shell) { } 1085 1086 /// An array access can be written A[4] or 4[A] (both are equivalent). 1087 /// - getBase() and getIdx() always present the normalized view: A[4]. 1088 /// In this case getBase() returns "A" and getIdx() returns "4". 1089 /// - getLHS() and getRHS() present the syntactic view. e.g. for 1090 /// 4[A] getLHS() returns "4". 1091 /// Note: Because vector element access is also written A[4] we must 1092 /// predicate the format conversion in getBase and getIdx only on the 1093 /// the type of the RHS, as it is possible for the LHS to be a vector of 1094 /// integer type 1095 Expr *getLHS() { return cast<Expr>(SubExprs[LHS]); } 1096 const Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } 1097 void setLHS(Expr *E) { SubExprs[LHS] = E; } 1098 1099 Expr *getRHS() { return cast<Expr>(SubExprs[RHS]); } 1100 const Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 1101 void setRHS(Expr *E) { SubExprs[RHS] = E; } 1102 1103 Expr *getBase() { 1104 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getLHS():getRHS()); 1105 } 1106 1107 const Expr *getBase() const { 1108 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getLHS():getRHS()); 1109 } 1110 1111 Expr *getIdx() { 1112 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getRHS():getLHS()); 1113 } 1114 1115 const Expr *getIdx() const { 1116 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getRHS():getLHS()); 1117 } 1118 1119 virtual SourceRange getSourceRange() const { 1120 return SourceRange(getLHS()->getLocStart(), RBracketLoc); 1121 } 1122 1123 SourceLocation getRBracketLoc() const { return RBracketLoc; } 1124 void setRBracketLoc(SourceLocation L) { RBracketLoc = L; } 1125 1126 virtual SourceLocation getExprLoc() const { return getBase()->getExprLoc(); } 1127 1128 static bool classof(const Stmt *T) { 1129 return T->getStmtClass() == ArraySubscriptExprClass; 1130 } 1131 static bool classof(const ArraySubscriptExpr *) { return true; } 1132 1133 // Iterators 1134 virtual child_iterator child_begin(); 1135 virtual child_iterator child_end(); 1136}; 1137 1138 1139/// CallExpr - Represents a function call (C99 6.5.2.2, C++ [expr.call]). 1140/// CallExpr itself represents a normal function call, e.g., "f(x, 2)", 1141/// while its subclasses may represent alternative syntax that (semantically) 1142/// results in a function call. For example, CXXOperatorCallExpr is 1143/// a subclass for overloaded operator calls that use operator syntax, e.g., 1144/// "str1 + str2" to resolve to a function call. 1145class CallExpr : public Expr { 1146 enum { FN=0, ARGS_START=1 }; 1147 Stmt **SubExprs; 1148 unsigned NumArgs; 1149 SourceLocation RParenLoc; 1150 1151protected: 1152 // This version of the constructor is for derived classes. 1153 CallExpr(ASTContext& C, StmtClass SC, Expr *fn, Expr **args, unsigned numargs, 1154 QualType t, SourceLocation rparenloc); 1155 1156 virtual void DoDestroy(ASTContext& C); 1157 1158public: 1159 CallExpr(ASTContext& C, Expr *fn, Expr **args, unsigned numargs, QualType t, 1160 SourceLocation rparenloc); 1161 1162 /// \brief Build an empty call expression. 1163 CallExpr(ASTContext &C, StmtClass SC, EmptyShell Empty); 1164 1165 ~CallExpr() {} 1166 1167 const Expr *getCallee() const { return cast<Expr>(SubExprs[FN]); } 1168 Expr *getCallee() { return cast<Expr>(SubExprs[FN]); } 1169 void setCallee(Expr *F) { SubExprs[FN] = F; } 1170 1171 /// \brief If the callee is a FunctionDecl, return it. Otherwise return 0. 1172 FunctionDecl *getDirectCallee(); 1173 const FunctionDecl *getDirectCallee() const { 1174 return const_cast<CallExpr*>(this)->getDirectCallee(); 1175 } 1176 1177 /// getNumArgs - Return the number of actual arguments to this call. 1178 /// 1179 unsigned getNumArgs() const { return NumArgs; } 1180 1181 /// getArg - Return the specified argument. 1182 Expr *getArg(unsigned Arg) { 1183 assert(Arg < NumArgs && "Arg access out of range!"); 1184 return cast<Expr>(SubExprs[Arg+ARGS_START]); 1185 } 1186 const Expr *getArg(unsigned Arg) const { 1187 assert(Arg < NumArgs && "Arg access out of range!"); 1188 return cast<Expr>(SubExprs[Arg+ARGS_START]); 1189 } 1190 1191 /// setArg - Set the specified argument. 1192 void setArg(unsigned Arg, Expr *ArgExpr) { 1193 assert(Arg < NumArgs && "Arg access out of range!"); 1194 SubExprs[Arg+ARGS_START] = ArgExpr; 1195 } 1196 1197 /// setNumArgs - This changes the number of arguments present in this call. 1198 /// Any orphaned expressions are deleted by this, and any new operands are set 1199 /// to null. 1200 void setNumArgs(ASTContext& C, unsigned NumArgs); 1201 1202 typedef ExprIterator arg_iterator; 1203 typedef ConstExprIterator const_arg_iterator; 1204 1205 arg_iterator arg_begin() { return SubExprs+ARGS_START; } 1206 arg_iterator arg_end() { return SubExprs+ARGS_START+getNumArgs(); } 1207 const_arg_iterator arg_begin() const { return SubExprs+ARGS_START; } 1208 const_arg_iterator arg_end() const { return SubExprs+ARGS_START+getNumArgs();} 1209 1210 /// getNumCommas - Return the number of commas that must have been present in 1211 /// this function call. 1212 unsigned getNumCommas() const { return NumArgs ? NumArgs - 1 : 0; } 1213 1214 /// isBuiltinCall - If this is a call to a builtin, return the builtin ID. If 1215 /// not, return 0. 1216 unsigned isBuiltinCall(ASTContext &Context) const; 1217 1218 /// getCallReturnType - Get the return type of the call expr. This is not 1219 /// always the type of the expr itself, if the return type is a reference 1220 /// type. 1221 QualType getCallReturnType() const; 1222 1223 SourceLocation getRParenLoc() const { return RParenLoc; } 1224 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1225 1226 virtual SourceRange getSourceRange() const { 1227 return SourceRange(getCallee()->getLocStart(), RParenLoc); 1228 } 1229 1230 static bool classof(const Stmt *T) { 1231 return T->getStmtClass() == CallExprClass || 1232 T->getStmtClass() == CXXOperatorCallExprClass || 1233 T->getStmtClass() == CXXMemberCallExprClass; 1234 } 1235 static bool classof(const CallExpr *) { return true; } 1236 static bool classof(const CXXOperatorCallExpr *) { return true; } 1237 static bool classof(const CXXMemberCallExpr *) { return true; } 1238 1239 // Iterators 1240 virtual child_iterator child_begin(); 1241 virtual child_iterator child_end(); 1242}; 1243 1244/// MemberExpr - [C99 6.5.2.3] Structure and Union Members. X->F and X.F. 1245/// 1246class MemberExpr : public Expr { 1247 /// Base - the expression for the base pointer or structure references. In 1248 /// X.F, this is "X". 1249 Stmt *Base; 1250 1251 /// MemberDecl - This is the decl being referenced by the field/member name. 1252 /// In X.F, this is the decl referenced by F. 1253 NamedDecl *MemberDecl; 1254 1255 /// MemberLoc - This is the location of the member name. 1256 SourceLocation MemberLoc; 1257 1258 /// IsArrow - True if this is "X->F", false if this is "X.F". 1259 bool IsArrow : 1; 1260 1261 /// \brief True if this member expression used a nested-name-specifier to 1262 /// refer to the member, e.g., "x->Base::f". When true, a NameQualifier 1263 /// structure is allocated immediately after the MemberExpr. 1264 bool HasQualifier : 1; 1265 1266 /// \brief True if this member expression specified a template argument list 1267 /// explicitly, e.g., x->f<int>. When true, an ExplicitTemplateArgumentList 1268 /// structure (and its TemplateArguments) are allocated immediately after 1269 /// the MemberExpr or, if the member expression also has a qualifier, after 1270 /// the NameQualifier structure. 1271 bool HasExplicitTemplateArgumentList : 1; 1272 1273 /// \brief Retrieve the qualifier that preceded the member name, if any. 1274 NameQualifier *getMemberQualifier() { 1275 if (!HasQualifier) 1276 return 0; 1277 1278 return reinterpret_cast<NameQualifier *> (this + 1); 1279 } 1280 1281 /// \brief Retrieve the qualifier that preceded the member name, if any. 1282 const NameQualifier *getMemberQualifier() const { 1283 return const_cast<MemberExpr *>(this)->getMemberQualifier(); 1284 } 1285 1286 /// \brief Retrieve the explicit template argument list that followed the 1287 /// member template name, if any. 1288 ExplicitTemplateArgumentList *getExplicitTemplateArgumentList() { 1289 if (!HasExplicitTemplateArgumentList) 1290 return 0; 1291 1292 if (!HasQualifier) 1293 return reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 1294 1295 return reinterpret_cast<ExplicitTemplateArgumentList *>( 1296 getMemberQualifier() + 1); 1297 } 1298 1299 /// \brief Retrieve the explicit template argument list that followed the 1300 /// member template name, if any. 1301 const ExplicitTemplateArgumentList *getExplicitTemplateArgumentList() const { 1302 return const_cast<MemberExpr *>(this)->getExplicitTemplateArgumentList(); 1303 } 1304 1305 MemberExpr(Expr *base, bool isarrow, NestedNameSpecifier *qual, 1306 SourceRange qualrange, NamedDecl *memberdecl, SourceLocation l, 1307 bool has_explicit, SourceLocation langle, 1308 const TemplateArgumentLoc *targs, unsigned numtargs, 1309 SourceLocation rangle, QualType ty); 1310 1311public: 1312 MemberExpr(Expr *base, bool isarrow, NamedDecl *memberdecl, SourceLocation l, 1313 QualType ty) 1314 : Expr(MemberExprClass, ty, 1315 base->isTypeDependent(), base->isValueDependent()), 1316 Base(base), MemberDecl(memberdecl), MemberLoc(l), IsArrow(isarrow), 1317 HasQualifier(false), HasExplicitTemplateArgumentList(false) {} 1318 1319 /// \brief Build an empty member reference expression. 1320 explicit MemberExpr(EmptyShell Empty) 1321 : Expr(MemberExprClass, Empty), HasQualifier(false), 1322 HasExplicitTemplateArgumentList(false) { } 1323 1324 static MemberExpr *Create(ASTContext &C, Expr *base, bool isarrow, 1325 NestedNameSpecifier *qual, SourceRange qualrange, 1326 NamedDecl *memberdecl, 1327 SourceLocation l, 1328 bool has_explicit, 1329 SourceLocation langle, 1330 const TemplateArgumentLoc *targs, 1331 unsigned numtargs, 1332 SourceLocation rangle, 1333 QualType ty); 1334 1335 void setBase(Expr *E) { Base = E; } 1336 Expr *getBase() const { return cast<Expr>(Base); } 1337 1338 /// \brief Retrieve the member declaration to which this expression refers. 1339 /// 1340 /// The returned declaration will either be a FieldDecl or (in C++) 1341 /// a CXXMethodDecl. 1342 NamedDecl *getMemberDecl() const { return MemberDecl; } 1343 void setMemberDecl(NamedDecl *D) { MemberDecl = D; } 1344 1345 /// \brief Determines whether this member expression actually had 1346 /// a C++ nested-name-specifier prior to the name of the member, e.g., 1347 /// x->Base::foo. 1348 bool hasQualifier() const { return HasQualifier; } 1349 1350 /// \brief If the member name was qualified, retrieves the source range of 1351 /// the nested-name-specifier that precedes the member name. Otherwise, 1352 /// returns an empty source range. 1353 SourceRange getQualifierRange() const { 1354 if (!HasQualifier) 1355 return SourceRange(); 1356 1357 return getMemberQualifier()->Range; 1358 } 1359 1360 /// \brief If the member name was qualified, retrieves the 1361 /// nested-name-specifier that precedes the member name. Otherwise, returns 1362 /// NULL. 1363 NestedNameSpecifier *getQualifier() const { 1364 if (!HasQualifier) 1365 return 0; 1366 1367 return getMemberQualifier()->NNS; 1368 } 1369 1370 /// \brief Determines whether this member expression actually had a C++ 1371 /// template argument list explicitly specified, e.g., x.f<int>. 1372 bool hasExplicitTemplateArgumentList() { 1373 return HasExplicitTemplateArgumentList; 1374 } 1375 1376 /// \brief Retrieve the location of the left angle bracket following the 1377 /// member name ('<'), if any. 1378 SourceLocation getLAngleLoc() const { 1379 if (!HasExplicitTemplateArgumentList) 1380 return SourceLocation(); 1381 1382 return getExplicitTemplateArgumentList()->LAngleLoc; 1383 } 1384 1385 /// \brief Retrieve the template arguments provided as part of this 1386 /// template-id. 1387 const TemplateArgumentLoc *getTemplateArgs() const { 1388 if (!HasExplicitTemplateArgumentList) 1389 return 0; 1390 1391 return getExplicitTemplateArgumentList()->getTemplateArgs(); 1392 } 1393 1394 /// \brief Retrieve the number of template arguments provided as part of this 1395 /// template-id. 1396 unsigned getNumTemplateArgs() const { 1397 if (!HasExplicitTemplateArgumentList) 1398 return 0; 1399 1400 return getExplicitTemplateArgumentList()->NumTemplateArgs; 1401 } 1402 1403 /// \brief Retrieve the location of the right angle bracket following the 1404 /// template arguments ('>'). 1405 SourceLocation getRAngleLoc() const { 1406 if (!HasExplicitTemplateArgumentList) 1407 return SourceLocation(); 1408 1409 return getExplicitTemplateArgumentList()->RAngleLoc; 1410 } 1411 1412 bool isArrow() const { return IsArrow; } 1413 void setArrow(bool A) { IsArrow = A; } 1414 1415 /// getMemberLoc - Return the location of the "member", in X->F, it is the 1416 /// location of 'F'. 1417 SourceLocation getMemberLoc() const { return MemberLoc; } 1418 void setMemberLoc(SourceLocation L) { MemberLoc = L; } 1419 1420 virtual SourceRange getSourceRange() const { 1421 // If we have an implicit base (like a C++ implicit this), 1422 // make sure not to return its location 1423 SourceLocation EndLoc = MemberLoc; 1424 if (HasExplicitTemplateArgumentList) 1425 EndLoc = getRAngleLoc(); 1426 1427 SourceLocation BaseLoc = getBase()->getLocStart(); 1428 if (BaseLoc.isInvalid()) 1429 return SourceRange(MemberLoc, EndLoc); 1430 return SourceRange(BaseLoc, EndLoc); 1431 } 1432 1433 virtual SourceLocation getExprLoc() const { return MemberLoc; } 1434 1435 static bool classof(const Stmt *T) { 1436 return T->getStmtClass() == MemberExprClass; 1437 } 1438 static bool classof(const MemberExpr *) { return true; } 1439 1440 // Iterators 1441 virtual child_iterator child_begin(); 1442 virtual child_iterator child_end(); 1443}; 1444 1445/// CompoundLiteralExpr - [C99 6.5.2.5] 1446/// 1447class CompoundLiteralExpr : public Expr { 1448 /// LParenLoc - If non-null, this is the location of the left paren in a 1449 /// compound literal like "(int){4}". This can be null if this is a 1450 /// synthesized compound expression. 1451 SourceLocation LParenLoc; 1452 Stmt *Init; 1453 bool FileScope; 1454public: 1455 CompoundLiteralExpr(SourceLocation lparenloc, QualType ty, Expr *init, 1456 bool fileScope) 1457 : Expr(CompoundLiteralExprClass, ty), LParenLoc(lparenloc), Init(init), 1458 FileScope(fileScope) {} 1459 1460 /// \brief Construct an empty compound literal. 1461 explicit CompoundLiteralExpr(EmptyShell Empty) 1462 : Expr(CompoundLiteralExprClass, Empty) { } 1463 1464 const Expr *getInitializer() const { return cast<Expr>(Init); } 1465 Expr *getInitializer() { return cast<Expr>(Init); } 1466 void setInitializer(Expr *E) { Init = E; } 1467 1468 bool isFileScope() const { return FileScope; } 1469 void setFileScope(bool FS) { FileScope = FS; } 1470 1471 SourceLocation getLParenLoc() const { return LParenLoc; } 1472 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 1473 1474 virtual SourceRange getSourceRange() const { 1475 // FIXME: Init should never be null. 1476 if (!Init) 1477 return SourceRange(); 1478 if (LParenLoc.isInvalid()) 1479 return Init->getSourceRange(); 1480 return SourceRange(LParenLoc, Init->getLocEnd()); 1481 } 1482 1483 static bool classof(const Stmt *T) { 1484 return T->getStmtClass() == CompoundLiteralExprClass; 1485 } 1486 static bool classof(const CompoundLiteralExpr *) { return true; } 1487 1488 // Iterators 1489 virtual child_iterator child_begin(); 1490 virtual child_iterator child_end(); 1491}; 1492 1493/// CastExpr - Base class for type casts, including both implicit 1494/// casts (ImplicitCastExpr) and explicit casts that have some 1495/// representation in the source code (ExplicitCastExpr's derived 1496/// classes). 1497class CastExpr : public Expr { 1498public: 1499 /// CastKind - the kind of cast this represents. 1500 enum CastKind { 1501 /// CK_Unknown - Unknown cast kind. 1502 /// FIXME: The goal is to get rid of this and make all casts have a 1503 /// kind so that the AST client doesn't have to try to figure out what's 1504 /// going on. 1505 CK_Unknown, 1506 1507 /// CK_BitCast - Used for reinterpret_cast. 1508 CK_BitCast, 1509 1510 /// CK_NoOp - Used for const_cast. 1511 CK_NoOp, 1512 1513 /// CK_DerivedToBase - Derived to base class casts. 1514 CK_DerivedToBase, 1515 1516 /// CK_Dynamic - Dynamic cast. 1517 CK_Dynamic, 1518 1519 /// CK_ToUnion - Cast to union (GCC extension). 1520 CK_ToUnion, 1521 1522 /// CK_ArrayToPointerDecay - Array to pointer decay. 1523 CK_ArrayToPointerDecay, 1524 1525 // CK_FunctionToPointerDecay - Function to pointer decay. 1526 CK_FunctionToPointerDecay, 1527 1528 /// CK_NullToMemberPointer - Null pointer to member pointer. 1529 CK_NullToMemberPointer, 1530 1531 /// CK_BaseToDerivedMemberPointer - Member pointer in base class to 1532 /// member pointer in derived class. 1533 CK_BaseToDerivedMemberPointer, 1534 1535 /// CK_UserDefinedConversion - Conversion using a user defined type 1536 /// conversion function. 1537 CK_UserDefinedConversion, 1538 1539 /// CK_ConstructorConversion - Conversion by constructor 1540 CK_ConstructorConversion, 1541 1542 /// CK_IntegralToPointer - Integral to pointer 1543 CK_IntegralToPointer, 1544 1545 /// CK_PointerToIntegral - Pointer to integral 1546 CK_PointerToIntegral, 1547 1548 /// CK_ToVoid - Cast to void. 1549 CK_ToVoid, 1550 1551 /// CK_VectorSplat - Casting from an integer/floating type to an extended 1552 /// vector type with the same element type as the src type. Splats the 1553 /// src expression into the destination expression. 1554 CK_VectorSplat, 1555 1556 /// CK_IntegralCast - Casting between integral types of different size. 1557 CK_IntegralCast, 1558 1559 /// CK_IntegralToFloating - Integral to floating point. 1560 CK_IntegralToFloating, 1561 1562 /// CK_FloatingToIntegral - Floating point to integral. 1563 CK_FloatingToIntegral, 1564 1565 /// CK_FloatingCast - Casting between floating types of different size. 1566 CK_FloatingCast 1567 }; 1568 1569private: 1570 CastKind Kind; 1571 Stmt *Op; 1572protected: 1573 CastExpr(StmtClass SC, QualType ty, const CastKind kind, Expr *op) : 1574 Expr(SC, ty, 1575 // Cast expressions are type-dependent if the type is 1576 // dependent (C++ [temp.dep.expr]p3). 1577 ty->isDependentType(), 1578 // Cast expressions are value-dependent if the type is 1579 // dependent or if the subexpression is value-dependent. 1580 ty->isDependentType() || (op && op->isValueDependent())), 1581 Kind(kind), Op(op) {} 1582 1583 /// \brief Construct an empty cast. 1584 CastExpr(StmtClass SC, EmptyShell Empty) 1585 : Expr(SC, Empty) { } 1586 1587public: 1588 CastKind getCastKind() const { return Kind; } 1589 void setCastKind(CastKind K) { Kind = K; } 1590 const char *getCastKindName() const; 1591 1592 Expr *getSubExpr() { return cast<Expr>(Op); } 1593 const Expr *getSubExpr() const { return cast<Expr>(Op); } 1594 void setSubExpr(Expr *E) { Op = E; } 1595 1596 static bool classof(const Stmt *T) { 1597 StmtClass SC = T->getStmtClass(); 1598 if (SC >= CXXNamedCastExprClass && SC <= CXXFunctionalCastExprClass) 1599 return true; 1600 1601 if (SC >= ImplicitCastExprClass && SC <= CStyleCastExprClass) 1602 return true; 1603 1604 return false; 1605 } 1606 static bool classof(const CastExpr *) { return true; } 1607 1608 // Iterators 1609 virtual child_iterator child_begin(); 1610 virtual child_iterator child_end(); 1611}; 1612 1613/// ImplicitCastExpr - Allows us to explicitly represent implicit type 1614/// conversions, which have no direct representation in the original 1615/// source code. For example: converting T[]->T*, void f()->void 1616/// (*f)(), float->double, short->int, etc. 1617/// 1618/// In C, implicit casts always produce rvalues. However, in C++, an 1619/// implicit cast whose result is being bound to a reference will be 1620/// an lvalue. For example: 1621/// 1622/// @code 1623/// class Base { }; 1624/// class Derived : public Base { }; 1625/// void f(Derived d) { 1626/// Base& b = d; // initializer is an ImplicitCastExpr to an lvalue of type Base 1627/// } 1628/// @endcode 1629class ImplicitCastExpr : public CastExpr { 1630 /// LvalueCast - Whether this cast produces an lvalue. 1631 bool LvalueCast; 1632 1633public: 1634 ImplicitCastExpr(QualType ty, CastKind kind, Expr *op, bool Lvalue) : 1635 CastExpr(ImplicitCastExprClass, ty, kind, op), LvalueCast(Lvalue) { } 1636 1637 /// \brief Construct an empty implicit cast. 1638 explicit ImplicitCastExpr(EmptyShell Shell) 1639 : CastExpr(ImplicitCastExprClass, Shell) { } 1640 1641 1642 virtual SourceRange getSourceRange() const { 1643 return getSubExpr()->getSourceRange(); 1644 } 1645 1646 /// isLvalueCast - Whether this cast produces an lvalue. 1647 bool isLvalueCast() const { return LvalueCast; } 1648 1649 /// setLvalueCast - Set whether this cast produces an lvalue. 1650 void setLvalueCast(bool Lvalue) { LvalueCast = Lvalue; } 1651 1652 static bool classof(const Stmt *T) { 1653 return T->getStmtClass() == ImplicitCastExprClass; 1654 } 1655 static bool classof(const ImplicitCastExpr *) { return true; } 1656}; 1657 1658/// ExplicitCastExpr - An explicit cast written in the source 1659/// code. 1660/// 1661/// This class is effectively an abstract class, because it provides 1662/// the basic representation of an explicitly-written cast without 1663/// specifying which kind of cast (C cast, functional cast, static 1664/// cast, etc.) was written; specific derived classes represent the 1665/// particular style of cast and its location information. 1666/// 1667/// Unlike implicit casts, explicit cast nodes have two different 1668/// types: the type that was written into the source code, and the 1669/// actual type of the expression as determined by semantic 1670/// analysis. These types may differ slightly. For example, in C++ one 1671/// can cast to a reference type, which indicates that the resulting 1672/// expression will be an lvalue. The reference type, however, will 1673/// not be used as the type of the expression. 1674class ExplicitCastExpr : public CastExpr { 1675 /// TypeAsWritten - The type that this expression is casting to, as 1676 /// written in the source code. 1677 QualType TypeAsWritten; 1678 1679protected: 1680 ExplicitCastExpr(StmtClass SC, QualType exprTy, CastKind kind, 1681 Expr *op, QualType writtenTy) 1682 : CastExpr(SC, exprTy, kind, op), TypeAsWritten(writtenTy) {} 1683 1684 /// \brief Construct an empty explicit cast. 1685 ExplicitCastExpr(StmtClass SC, EmptyShell Shell) 1686 : CastExpr(SC, Shell) { } 1687 1688public: 1689 /// getTypeAsWritten - Returns the type that this expression is 1690 /// casting to, as written in the source code. 1691 QualType getTypeAsWritten() const { return TypeAsWritten; } 1692 void setTypeAsWritten(QualType T) { TypeAsWritten = T; } 1693 1694 static bool classof(const Stmt *T) { 1695 StmtClass SC = T->getStmtClass(); 1696 if (SC >= ExplicitCastExprClass && SC <= CStyleCastExprClass) 1697 return true; 1698 if (SC >= CXXNamedCastExprClass && SC <= CXXFunctionalCastExprClass) 1699 return true; 1700 1701 return false; 1702 } 1703 static bool classof(const ExplicitCastExpr *) { return true; } 1704}; 1705 1706/// CStyleCastExpr - An explicit cast in C (C99 6.5.4) or a C-style 1707/// cast in C++ (C++ [expr.cast]), which uses the syntax 1708/// (Type)expr. For example: @c (int)f. 1709class CStyleCastExpr : public ExplicitCastExpr { 1710 SourceLocation LPLoc; // the location of the left paren 1711 SourceLocation RPLoc; // the location of the right paren 1712public: 1713 CStyleCastExpr(QualType exprTy, CastKind kind, Expr *op, QualType writtenTy, 1714 SourceLocation l, SourceLocation r) : 1715 ExplicitCastExpr(CStyleCastExprClass, exprTy, kind, op, writtenTy), 1716 LPLoc(l), RPLoc(r) {} 1717 1718 /// \brief Construct an empty C-style explicit cast. 1719 explicit CStyleCastExpr(EmptyShell Shell) 1720 : ExplicitCastExpr(CStyleCastExprClass, Shell) { } 1721 1722 SourceLocation getLParenLoc() const { return LPLoc; } 1723 void setLParenLoc(SourceLocation L) { LPLoc = L; } 1724 1725 SourceLocation getRParenLoc() const { return RPLoc; } 1726 void setRParenLoc(SourceLocation L) { RPLoc = L; } 1727 1728 virtual SourceRange getSourceRange() const { 1729 return SourceRange(LPLoc, getSubExpr()->getSourceRange().getEnd()); 1730 } 1731 static bool classof(const Stmt *T) { 1732 return T->getStmtClass() == CStyleCastExprClass; 1733 } 1734 static bool classof(const CStyleCastExpr *) { return true; } 1735}; 1736 1737/// \brief A builtin binary operation expression such as "x + y" or "x <= y". 1738/// 1739/// This expression node kind describes a builtin binary operation, 1740/// such as "x + y" for integer values "x" and "y". The operands will 1741/// already have been converted to appropriate types (e.g., by 1742/// performing promotions or conversions). 1743/// 1744/// In C++, where operators may be overloaded, a different kind of 1745/// expression node (CXXOperatorCallExpr) is used to express the 1746/// invocation of an overloaded operator with operator syntax. Within 1747/// a C++ template, whether BinaryOperator or CXXOperatorCallExpr is 1748/// used to store an expression "x + y" depends on the subexpressions 1749/// for x and y. If neither x or y is type-dependent, and the "+" 1750/// operator resolves to a built-in operation, BinaryOperator will be 1751/// used to express the computation (x and y may still be 1752/// value-dependent). If either x or y is type-dependent, or if the 1753/// "+" resolves to an overloaded operator, CXXOperatorCallExpr will 1754/// be used to express the computation. 1755class BinaryOperator : public Expr { 1756public: 1757 enum Opcode { 1758 // Operators listed in order of precedence. 1759 // Note that additions to this should also update the StmtVisitor class. 1760 PtrMemD, PtrMemI, // [C++ 5.5] Pointer-to-member operators. 1761 Mul, Div, Rem, // [C99 6.5.5] Multiplicative operators. 1762 Add, Sub, // [C99 6.5.6] Additive operators. 1763 Shl, Shr, // [C99 6.5.7] Bitwise shift operators. 1764 LT, GT, LE, GE, // [C99 6.5.8] Relational operators. 1765 EQ, NE, // [C99 6.5.9] Equality operators. 1766 And, // [C99 6.5.10] Bitwise AND operator. 1767 Xor, // [C99 6.5.11] Bitwise XOR operator. 1768 Or, // [C99 6.5.12] Bitwise OR operator. 1769 LAnd, // [C99 6.5.13] Logical AND operator. 1770 LOr, // [C99 6.5.14] Logical OR operator. 1771 Assign, MulAssign,// [C99 6.5.16] Assignment operators. 1772 DivAssign, RemAssign, 1773 AddAssign, SubAssign, 1774 ShlAssign, ShrAssign, 1775 AndAssign, XorAssign, 1776 OrAssign, 1777 Comma // [C99 6.5.17] Comma operator. 1778 }; 1779private: 1780 enum { LHS, RHS, END_EXPR }; 1781 Stmt* SubExprs[END_EXPR]; 1782 Opcode Opc; 1783 SourceLocation OpLoc; 1784public: 1785 1786 BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, 1787 SourceLocation opLoc) 1788 : Expr(BinaryOperatorClass, ResTy, 1789 lhs->isTypeDependent() || rhs->isTypeDependent(), 1790 lhs->isValueDependent() || rhs->isValueDependent()), 1791 Opc(opc), OpLoc(opLoc) { 1792 SubExprs[LHS] = lhs; 1793 SubExprs[RHS] = rhs; 1794 assert(!isCompoundAssignmentOp() && 1795 "Use ArithAssignBinaryOperator for compound assignments"); 1796 } 1797 1798 /// \brief Construct an empty binary operator. 1799 explicit BinaryOperator(EmptyShell Empty) 1800 : Expr(BinaryOperatorClass, Empty), Opc(Comma) { } 1801 1802 SourceLocation getOperatorLoc() const { return OpLoc; } 1803 void setOperatorLoc(SourceLocation L) { OpLoc = L; } 1804 1805 Opcode getOpcode() const { return Opc; } 1806 void setOpcode(Opcode O) { Opc = O; } 1807 1808 Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } 1809 void setLHS(Expr *E) { SubExprs[LHS] = E; } 1810 Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 1811 void setRHS(Expr *E) { SubExprs[RHS] = E; } 1812 1813 virtual SourceRange getSourceRange() const { 1814 return SourceRange(getLHS()->getLocStart(), getRHS()->getLocEnd()); 1815 } 1816 1817 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 1818 /// corresponds to, e.g. "<<=". 1819 static const char *getOpcodeStr(Opcode Op); 1820 1821 /// \brief Retrieve the binary opcode that corresponds to the given 1822 /// overloaded operator. 1823 static Opcode getOverloadedOpcode(OverloadedOperatorKind OO); 1824 1825 /// \brief Retrieve the overloaded operator kind that corresponds to 1826 /// the given binary opcode. 1827 static OverloadedOperatorKind getOverloadedOperator(Opcode Opc); 1828 1829 /// predicates to categorize the respective opcodes. 1830 bool isMultiplicativeOp() const { return Opc >= Mul && Opc <= Rem; } 1831 bool isAdditiveOp() const { return Opc == Add || Opc == Sub; } 1832 static bool isShiftOp(Opcode Opc) { return Opc == Shl || Opc == Shr; } 1833 bool isShiftOp() const { return isShiftOp(Opc); } 1834 1835 static bool isBitwiseOp(Opcode Opc) { return Opc >= And && Opc <= Or; } 1836 bool isBitwiseOp() const { return isBitwiseOp(Opc); } 1837 1838 static bool isRelationalOp(Opcode Opc) { return Opc >= LT && Opc <= GE; } 1839 bool isRelationalOp() const { return isRelationalOp(Opc); } 1840 1841 static bool isEqualityOp(Opcode Opc) { return Opc == EQ || Opc == NE; } 1842 bool isEqualityOp() const { return isEqualityOp(Opc); } 1843 1844 static bool isComparisonOp(Opcode Opc) { return Opc >= LT && Opc <= NE; } 1845 bool isComparisonOp() const { return isComparisonOp(Opc); } 1846 1847 static bool isLogicalOp(Opcode Opc) { return Opc == LAnd || Opc == LOr; } 1848 bool isLogicalOp() const { return isLogicalOp(Opc); } 1849 1850 bool isAssignmentOp() const { return Opc >= Assign && Opc <= OrAssign; } 1851 bool isCompoundAssignmentOp() const { return Opc > Assign && Opc <= OrAssign;} 1852 bool isShiftAssignOp() const { return Opc == ShlAssign || Opc == ShrAssign; } 1853 1854 static bool classof(const Stmt *S) { 1855 return S->getStmtClass() == BinaryOperatorClass || 1856 S->getStmtClass() == CompoundAssignOperatorClass; 1857 } 1858 static bool classof(const BinaryOperator *) { return true; } 1859 1860 // Iterators 1861 virtual child_iterator child_begin(); 1862 virtual child_iterator child_end(); 1863 1864protected: 1865 BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, 1866 SourceLocation oploc, bool dead) 1867 : Expr(CompoundAssignOperatorClass, ResTy), Opc(opc), OpLoc(oploc) { 1868 SubExprs[LHS] = lhs; 1869 SubExprs[RHS] = rhs; 1870 } 1871 1872 BinaryOperator(StmtClass SC, EmptyShell Empty) 1873 : Expr(SC, Empty), Opc(MulAssign) { } 1874}; 1875 1876/// CompoundAssignOperator - For compound assignments (e.g. +=), we keep 1877/// track of the type the operation is performed in. Due to the semantics of 1878/// these operators, the operands are promoted, the aritmetic performed, an 1879/// implicit conversion back to the result type done, then the assignment takes 1880/// place. This captures the intermediate type which the computation is done 1881/// in. 1882class CompoundAssignOperator : public BinaryOperator { 1883 QualType ComputationLHSType; 1884 QualType ComputationResultType; 1885public: 1886 CompoundAssignOperator(Expr *lhs, Expr *rhs, Opcode opc, 1887 QualType ResType, QualType CompLHSType, 1888 QualType CompResultType, 1889 SourceLocation OpLoc) 1890 : BinaryOperator(lhs, rhs, opc, ResType, OpLoc, true), 1891 ComputationLHSType(CompLHSType), 1892 ComputationResultType(CompResultType) { 1893 assert(isCompoundAssignmentOp() && 1894 "Only should be used for compound assignments"); 1895 } 1896 1897 /// \brief Build an empty compound assignment operator expression. 1898 explicit CompoundAssignOperator(EmptyShell Empty) 1899 : BinaryOperator(CompoundAssignOperatorClass, Empty) { } 1900 1901 // The two computation types are the type the LHS is converted 1902 // to for the computation and the type of the result; the two are 1903 // distinct in a few cases (specifically, int+=ptr and ptr-=ptr). 1904 QualType getComputationLHSType() const { return ComputationLHSType; } 1905 void setComputationLHSType(QualType T) { ComputationLHSType = T; } 1906 1907 QualType getComputationResultType() const { return ComputationResultType; } 1908 void setComputationResultType(QualType T) { ComputationResultType = T; } 1909 1910 static bool classof(const CompoundAssignOperator *) { return true; } 1911 static bool classof(const Stmt *S) { 1912 return S->getStmtClass() == CompoundAssignOperatorClass; 1913 } 1914}; 1915 1916/// ConditionalOperator - The ?: operator. Note that LHS may be null when the 1917/// GNU "missing LHS" extension is in use. 1918/// 1919class ConditionalOperator : public Expr { 1920 enum { COND, LHS, RHS, END_EXPR }; 1921 Stmt* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. 1922 SourceLocation QuestionLoc, ColonLoc; 1923public: 1924 ConditionalOperator(Expr *cond, SourceLocation QLoc, Expr *lhs, 1925 SourceLocation CLoc, Expr *rhs, QualType t) 1926 : Expr(ConditionalOperatorClass, t, 1927 // FIXME: the type of the conditional operator doesn't 1928 // depend on the type of the conditional, but the standard 1929 // seems to imply that it could. File a bug! 1930 ((lhs && lhs->isTypeDependent()) || (rhs && rhs->isTypeDependent())), 1931 (cond->isValueDependent() || 1932 (lhs && lhs->isValueDependent()) || 1933 (rhs && rhs->isValueDependent()))), 1934 QuestionLoc(QLoc), 1935 ColonLoc(CLoc) { 1936 SubExprs[COND] = cond; 1937 SubExprs[LHS] = lhs; 1938 SubExprs[RHS] = rhs; 1939 } 1940 1941 /// \brief Build an empty conditional operator. 1942 explicit ConditionalOperator(EmptyShell Empty) 1943 : Expr(ConditionalOperatorClass, Empty) { } 1944 1945 // getCond - Return the expression representing the condition for 1946 // the ?: operator. 1947 Expr *getCond() const { return cast<Expr>(SubExprs[COND]); } 1948 void setCond(Expr *E) { SubExprs[COND] = E; } 1949 1950 // getTrueExpr - Return the subexpression representing the value of the ?: 1951 // expression if the condition evaluates to true. In most cases this value 1952 // will be the same as getLHS() except a GCC extension allows the left 1953 // subexpression to be omitted, and instead of the condition be returned. 1954 // e.g: x ?: y is shorthand for x ? x : y, except that the expression "x" 1955 // is only evaluated once. 1956 Expr *getTrueExpr() const { 1957 return cast<Expr>(SubExprs[LHS] ? SubExprs[LHS] : SubExprs[COND]); 1958 } 1959 1960 // getTrueExpr - Return the subexpression representing the value of the ?: 1961 // expression if the condition evaluates to false. This is the same as getRHS. 1962 Expr *getFalseExpr() const { return cast<Expr>(SubExprs[RHS]); } 1963 1964 Expr *getLHS() const { return cast_or_null<Expr>(SubExprs[LHS]); } 1965 void setLHS(Expr *E) { SubExprs[LHS] = E; } 1966 1967 Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 1968 void setRHS(Expr *E) { SubExprs[RHS] = E; } 1969 1970 SourceLocation getQuestionLoc() const { return QuestionLoc; } 1971 void setQuestionLoc(SourceLocation L) { QuestionLoc = L; } 1972 1973 SourceLocation getColonLoc() const { return ColonLoc; } 1974 void setColonLoc(SourceLocation L) { ColonLoc = L; } 1975 1976 virtual SourceRange getSourceRange() const { 1977 return SourceRange(getCond()->getLocStart(), getRHS()->getLocEnd()); 1978 } 1979 static bool classof(const Stmt *T) { 1980 return T->getStmtClass() == ConditionalOperatorClass; 1981 } 1982 static bool classof(const ConditionalOperator *) { return true; } 1983 1984 // Iterators 1985 virtual child_iterator child_begin(); 1986 virtual child_iterator child_end(); 1987}; 1988 1989/// AddrLabelExpr - The GNU address of label extension, representing &&label. 1990class AddrLabelExpr : public Expr { 1991 SourceLocation AmpAmpLoc, LabelLoc; 1992 LabelStmt *Label; 1993public: 1994 AddrLabelExpr(SourceLocation AALoc, SourceLocation LLoc, LabelStmt *L, 1995 QualType t) 1996 : Expr(AddrLabelExprClass, t), AmpAmpLoc(AALoc), LabelLoc(LLoc), Label(L) {} 1997 1998 /// \brief Build an empty address of a label expression. 1999 explicit AddrLabelExpr(EmptyShell Empty) 2000 : Expr(AddrLabelExprClass, Empty) { } 2001 2002 SourceLocation getAmpAmpLoc() const { return AmpAmpLoc; } 2003 void setAmpAmpLoc(SourceLocation L) { AmpAmpLoc = L; } 2004 SourceLocation getLabelLoc() const { return LabelLoc; } 2005 void setLabelLoc(SourceLocation L) { LabelLoc = L; } 2006 2007 virtual SourceRange getSourceRange() const { 2008 return SourceRange(AmpAmpLoc, LabelLoc); 2009 } 2010 2011 LabelStmt *getLabel() const { return Label; } 2012 void setLabel(LabelStmt *S) { Label = S; } 2013 2014 static bool classof(const Stmt *T) { 2015 return T->getStmtClass() == AddrLabelExprClass; 2016 } 2017 static bool classof(const AddrLabelExpr *) { return true; } 2018 2019 // Iterators 2020 virtual child_iterator child_begin(); 2021 virtual child_iterator child_end(); 2022}; 2023 2024/// StmtExpr - This is the GNU Statement Expression extension: ({int X=4; X;}). 2025/// The StmtExpr contains a single CompoundStmt node, which it evaluates and 2026/// takes the value of the last subexpression. 2027class StmtExpr : public Expr { 2028 Stmt *SubStmt; 2029 SourceLocation LParenLoc, RParenLoc; 2030public: 2031 StmtExpr(CompoundStmt *substmt, QualType T, 2032 SourceLocation lp, SourceLocation rp) : 2033 Expr(StmtExprClass, T), SubStmt(substmt), LParenLoc(lp), RParenLoc(rp) { } 2034 2035 /// \brief Build an empty statement expression. 2036 explicit StmtExpr(EmptyShell Empty) : Expr(StmtExprClass, Empty) { } 2037 2038 CompoundStmt *getSubStmt() { return cast<CompoundStmt>(SubStmt); } 2039 const CompoundStmt *getSubStmt() const { return cast<CompoundStmt>(SubStmt); } 2040 void setSubStmt(CompoundStmt *S) { SubStmt = S; } 2041 2042 virtual SourceRange getSourceRange() const { 2043 return SourceRange(LParenLoc, RParenLoc); 2044 } 2045 2046 SourceLocation getLParenLoc() const { return LParenLoc; } 2047 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 2048 SourceLocation getRParenLoc() const { return RParenLoc; } 2049 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2050 2051 static bool classof(const Stmt *T) { 2052 return T->getStmtClass() == StmtExprClass; 2053 } 2054 static bool classof(const StmtExpr *) { return true; } 2055 2056 // Iterators 2057 virtual child_iterator child_begin(); 2058 virtual child_iterator child_end(); 2059}; 2060 2061/// TypesCompatibleExpr - GNU builtin-in function __builtin_types_compatible_p. 2062/// This AST node represents a function that returns 1 if two *types* (not 2063/// expressions) are compatible. The result of this built-in function can be 2064/// used in integer constant expressions. 2065class TypesCompatibleExpr : public Expr { 2066 QualType Type1; 2067 QualType Type2; 2068 SourceLocation BuiltinLoc, RParenLoc; 2069public: 2070 TypesCompatibleExpr(QualType ReturnType, SourceLocation BLoc, 2071 QualType t1, QualType t2, SourceLocation RP) : 2072 Expr(TypesCompatibleExprClass, ReturnType), Type1(t1), Type2(t2), 2073 BuiltinLoc(BLoc), RParenLoc(RP) {} 2074 2075 /// \brief Build an empty __builtin_type_compatible_p expression. 2076 explicit TypesCompatibleExpr(EmptyShell Empty) 2077 : Expr(TypesCompatibleExprClass, Empty) { } 2078 2079 QualType getArgType1() const { return Type1; } 2080 void setArgType1(QualType T) { Type1 = T; } 2081 QualType getArgType2() const { return Type2; } 2082 void setArgType2(QualType T) { Type2 = T; } 2083 2084 SourceLocation getBuiltinLoc() const { return BuiltinLoc; } 2085 void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } 2086 2087 SourceLocation getRParenLoc() const { return RParenLoc; } 2088 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2089 2090 virtual SourceRange getSourceRange() const { 2091 return SourceRange(BuiltinLoc, RParenLoc); 2092 } 2093 static bool classof(const Stmt *T) { 2094 return T->getStmtClass() == TypesCompatibleExprClass; 2095 } 2096 static bool classof(const TypesCompatibleExpr *) { return true; } 2097 2098 // Iterators 2099 virtual child_iterator child_begin(); 2100 virtual child_iterator child_end(); 2101}; 2102 2103/// ShuffleVectorExpr - clang-specific builtin-in function 2104/// __builtin_shufflevector. 2105/// This AST node represents a operator that does a constant 2106/// shuffle, similar to LLVM's shufflevector instruction. It takes 2107/// two vectors and a variable number of constant indices, 2108/// and returns the appropriately shuffled vector. 2109class ShuffleVectorExpr : public Expr { 2110 SourceLocation BuiltinLoc, RParenLoc; 2111 2112 // SubExprs - the list of values passed to the __builtin_shufflevector 2113 // function. The first two are vectors, and the rest are constant 2114 // indices. The number of values in this list is always 2115 // 2+the number of indices in the vector type. 2116 Stmt **SubExprs; 2117 unsigned NumExprs; 2118 2119protected: 2120 virtual void DoDestroy(ASTContext &C); 2121 2122public: 2123 ShuffleVectorExpr(ASTContext &C, Expr **args, unsigned nexpr, 2124 QualType Type, SourceLocation BLoc, 2125 SourceLocation RP) : 2126 Expr(ShuffleVectorExprClass, Type), BuiltinLoc(BLoc), 2127 RParenLoc(RP), NumExprs(nexpr) { 2128 2129 SubExprs = new (C) Stmt*[nexpr]; 2130 for (unsigned i = 0; i < nexpr; i++) 2131 SubExprs[i] = args[i]; 2132 } 2133 2134 /// \brief Build an empty vector-shuffle expression. 2135 explicit ShuffleVectorExpr(EmptyShell Empty) 2136 : Expr(ShuffleVectorExprClass, Empty), SubExprs(0) { } 2137 2138 SourceLocation getBuiltinLoc() const { return BuiltinLoc; } 2139 void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } 2140 2141 SourceLocation getRParenLoc() const { return RParenLoc; } 2142 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2143 2144 virtual SourceRange getSourceRange() const { 2145 return SourceRange(BuiltinLoc, RParenLoc); 2146 } 2147 static bool classof(const Stmt *T) { 2148 return T->getStmtClass() == ShuffleVectorExprClass; 2149 } 2150 static bool classof(const ShuffleVectorExpr *) { return true; } 2151 2152 ~ShuffleVectorExpr() {} 2153 2154 /// getNumSubExprs - Return the size of the SubExprs array. This includes the 2155 /// constant expression, the actual arguments passed in, and the function 2156 /// pointers. 2157 unsigned getNumSubExprs() const { return NumExprs; } 2158 2159 /// getExpr - Return the Expr at the specified index. 2160 Expr *getExpr(unsigned Index) { 2161 assert((Index < NumExprs) && "Arg access out of range!"); 2162 return cast<Expr>(SubExprs[Index]); 2163 } 2164 const Expr *getExpr(unsigned Index) const { 2165 assert((Index < NumExprs) && "Arg access out of range!"); 2166 return cast<Expr>(SubExprs[Index]); 2167 } 2168 2169 void setExprs(ASTContext &C, Expr ** Exprs, unsigned NumExprs); 2170 2171 unsigned getShuffleMaskIdx(ASTContext &Ctx, unsigned N) { 2172 assert((N < NumExprs - 2) && "Shuffle idx out of range!"); 2173 return getExpr(N+2)->EvaluateAsInt(Ctx).getZExtValue(); 2174 } 2175 2176 // Iterators 2177 virtual child_iterator child_begin(); 2178 virtual child_iterator child_end(); 2179}; 2180 2181/// ChooseExpr - GNU builtin-in function __builtin_choose_expr. 2182/// This AST node is similar to the conditional operator (?:) in C, with 2183/// the following exceptions: 2184/// - the test expression must be a integer constant expression. 2185/// - the expression returned acts like the chosen subexpression in every 2186/// visible way: the type is the same as that of the chosen subexpression, 2187/// and all predicates (whether it's an l-value, whether it's an integer 2188/// constant expression, etc.) return the same result as for the chosen 2189/// sub-expression. 2190class ChooseExpr : public Expr { 2191 enum { COND, LHS, RHS, END_EXPR }; 2192 Stmt* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. 2193 SourceLocation BuiltinLoc, RParenLoc; 2194public: 2195 ChooseExpr(SourceLocation BLoc, Expr *cond, Expr *lhs, Expr *rhs, QualType t, 2196 SourceLocation RP, bool TypeDependent, bool ValueDependent) 2197 : Expr(ChooseExprClass, t, TypeDependent, ValueDependent), 2198 BuiltinLoc(BLoc), RParenLoc(RP) { 2199 SubExprs[COND] = cond; 2200 SubExprs[LHS] = lhs; 2201 SubExprs[RHS] = rhs; 2202 } 2203 2204 /// \brief Build an empty __builtin_choose_expr. 2205 explicit ChooseExpr(EmptyShell Empty) : Expr(ChooseExprClass, Empty) { } 2206 2207 /// isConditionTrue - Return whether the condition is true (i.e. not 2208 /// equal to zero). 2209 bool isConditionTrue(ASTContext &C) const; 2210 2211 /// getChosenSubExpr - Return the subexpression chosen according to the 2212 /// condition. 2213 Expr *getChosenSubExpr(ASTContext &C) const { 2214 return isConditionTrue(C) ? getLHS() : getRHS(); 2215 } 2216 2217 Expr *getCond() const { return cast<Expr>(SubExprs[COND]); } 2218 void setCond(Expr *E) { SubExprs[COND] = E; } 2219 Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } 2220 void setLHS(Expr *E) { SubExprs[LHS] = E; } 2221 Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 2222 void setRHS(Expr *E) { SubExprs[RHS] = E; } 2223 2224 SourceLocation getBuiltinLoc() const { return BuiltinLoc; } 2225 void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } 2226 2227 SourceLocation getRParenLoc() const { return RParenLoc; } 2228 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2229 2230 virtual SourceRange getSourceRange() const { 2231 return SourceRange(BuiltinLoc, RParenLoc); 2232 } 2233 static bool classof(const Stmt *T) { 2234 return T->getStmtClass() == ChooseExprClass; 2235 } 2236 static bool classof(const ChooseExpr *) { return true; } 2237 2238 // Iterators 2239 virtual child_iterator child_begin(); 2240 virtual child_iterator child_end(); 2241}; 2242 2243/// GNUNullExpr - Implements the GNU __null extension, which is a name 2244/// for a null pointer constant that has integral type (e.g., int or 2245/// long) and is the same size and alignment as a pointer. The __null 2246/// extension is typically only used by system headers, which define 2247/// NULL as __null in C++ rather than using 0 (which is an integer 2248/// that may not match the size of a pointer). 2249class GNUNullExpr : public Expr { 2250 /// TokenLoc - The location of the __null keyword. 2251 SourceLocation TokenLoc; 2252 2253public: 2254 GNUNullExpr(QualType Ty, SourceLocation Loc) 2255 : Expr(GNUNullExprClass, Ty), TokenLoc(Loc) { } 2256 2257 /// \brief Build an empty GNU __null expression. 2258 explicit GNUNullExpr(EmptyShell Empty) : Expr(GNUNullExprClass, Empty) { } 2259 2260 /// getTokenLocation - The location of the __null token. 2261 SourceLocation getTokenLocation() const { return TokenLoc; } 2262 void setTokenLocation(SourceLocation L) { TokenLoc = L; } 2263 2264 virtual SourceRange getSourceRange() const { 2265 return SourceRange(TokenLoc); 2266 } 2267 static bool classof(const Stmt *T) { 2268 return T->getStmtClass() == GNUNullExprClass; 2269 } 2270 static bool classof(const GNUNullExpr *) { return true; } 2271 2272 // Iterators 2273 virtual child_iterator child_begin(); 2274 virtual child_iterator child_end(); 2275}; 2276 2277/// VAArgExpr, used for the builtin function __builtin_va_start. 2278class VAArgExpr : public Expr { 2279 Stmt *Val; 2280 SourceLocation BuiltinLoc, RParenLoc; 2281public: 2282 VAArgExpr(SourceLocation BLoc, Expr* e, QualType t, SourceLocation RPLoc) 2283 : Expr(VAArgExprClass, t), 2284 Val(e), 2285 BuiltinLoc(BLoc), 2286 RParenLoc(RPLoc) { } 2287 2288 /// \brief Create an empty __builtin_va_start expression. 2289 explicit VAArgExpr(EmptyShell Empty) : Expr(VAArgExprClass, Empty) { } 2290 2291 const Expr *getSubExpr() const { return cast<Expr>(Val); } 2292 Expr *getSubExpr() { return cast<Expr>(Val); } 2293 void setSubExpr(Expr *E) { Val = E; } 2294 2295 SourceLocation getBuiltinLoc() const { return BuiltinLoc; } 2296 void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } 2297 2298 SourceLocation getRParenLoc() const { return RParenLoc; } 2299 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2300 2301 virtual SourceRange getSourceRange() const { 2302 return SourceRange(BuiltinLoc, RParenLoc); 2303 } 2304 static bool classof(const Stmt *T) { 2305 return T->getStmtClass() == VAArgExprClass; 2306 } 2307 static bool classof(const VAArgExpr *) { return true; } 2308 2309 // Iterators 2310 virtual child_iterator child_begin(); 2311 virtual child_iterator child_end(); 2312}; 2313 2314/// @brief Describes an C or C++ initializer list. 2315/// 2316/// InitListExpr describes an initializer list, which can be used to 2317/// initialize objects of different types, including 2318/// struct/class/union types, arrays, and vectors. For example: 2319/// 2320/// @code 2321/// struct foo x = { 1, { 2, 3 } }; 2322/// @endcode 2323/// 2324/// Prior to semantic analysis, an initializer list will represent the 2325/// initializer list as written by the user, but will have the 2326/// placeholder type "void". This initializer list is called the 2327/// syntactic form of the initializer, and may contain C99 designated 2328/// initializers (represented as DesignatedInitExprs), initializations 2329/// of subobject members without explicit braces, and so on. Clients 2330/// interested in the original syntax of the initializer list should 2331/// use the syntactic form of the initializer list. 2332/// 2333/// After semantic analysis, the initializer list will represent the 2334/// semantic form of the initializer, where the initializations of all 2335/// subobjects are made explicit with nested InitListExpr nodes and 2336/// C99 designators have been eliminated by placing the designated 2337/// initializations into the subobject they initialize. Additionally, 2338/// any "holes" in the initialization, where no initializer has been 2339/// specified for a particular subobject, will be replaced with 2340/// implicitly-generated ImplicitValueInitExpr expressions that 2341/// value-initialize the subobjects. Note, however, that the 2342/// initializer lists may still have fewer initializers than there are 2343/// elements to initialize within the object. 2344/// 2345/// Given the semantic form of the initializer list, one can retrieve 2346/// the original syntactic form of that initializer list (if it 2347/// exists) using getSyntacticForm(). Since many initializer lists 2348/// have the same syntactic and semantic forms, getSyntacticForm() may 2349/// return NULL, indicating that the current initializer list also 2350/// serves as its syntactic form. 2351class InitListExpr : public Expr { 2352 // FIXME: Eliminate this vector in favor of ASTContext allocation 2353 std::vector<Stmt *> InitExprs; 2354 SourceLocation LBraceLoc, RBraceLoc; 2355 2356 /// Contains the initializer list that describes the syntactic form 2357 /// written in the source code. 2358 InitListExpr *SyntacticForm; 2359 2360 /// If this initializer list initializes a union, specifies which 2361 /// field within the union will be initialized. 2362 FieldDecl *UnionFieldInit; 2363 2364 /// Whether this initializer list originally had a GNU array-range 2365 /// designator in it. This is a temporary marker used by CodeGen. 2366 bool HadArrayRangeDesignator; 2367 2368public: 2369 InitListExpr(SourceLocation lbraceloc, Expr **initexprs, unsigned numinits, 2370 SourceLocation rbraceloc); 2371 2372 /// \brief Build an empty initializer list. 2373 explicit InitListExpr(EmptyShell Empty) : Expr(InitListExprClass, Empty) { } 2374 2375 unsigned getNumInits() const { return InitExprs.size(); } 2376 2377 const Expr* getInit(unsigned Init) const { 2378 assert(Init < getNumInits() && "Initializer access out of range!"); 2379 return cast_or_null<Expr>(InitExprs[Init]); 2380 } 2381 2382 Expr* getInit(unsigned Init) { 2383 assert(Init < getNumInits() && "Initializer access out of range!"); 2384 return cast_or_null<Expr>(InitExprs[Init]); 2385 } 2386 2387 void setInit(unsigned Init, Expr *expr) { 2388 assert(Init < getNumInits() && "Initializer access out of range!"); 2389 InitExprs[Init] = expr; 2390 } 2391 2392 /// \brief Reserve space for some number of initializers. 2393 void reserveInits(unsigned NumInits); 2394 2395 /// @brief Specify the number of initializers 2396 /// 2397 /// If there are more than @p NumInits initializers, the remaining 2398 /// initializers will be destroyed. If there are fewer than @p 2399 /// NumInits initializers, NULL expressions will be added for the 2400 /// unknown initializers. 2401 void resizeInits(ASTContext &Context, unsigned NumInits); 2402 2403 /// @brief Updates the initializer at index @p Init with the new 2404 /// expression @p expr, and returns the old expression at that 2405 /// location. 2406 /// 2407 /// When @p Init is out of range for this initializer list, the 2408 /// initializer list will be extended with NULL expressions to 2409 /// accomodate the new entry. 2410 Expr *updateInit(unsigned Init, Expr *expr); 2411 2412 /// \brief If this initializes a union, specifies which field in the 2413 /// union to initialize. 2414 /// 2415 /// Typically, this field is the first named field within the 2416 /// union. However, a designated initializer can specify the 2417 /// initialization of a different field within the union. 2418 FieldDecl *getInitializedFieldInUnion() { return UnionFieldInit; } 2419 void setInitializedFieldInUnion(FieldDecl *FD) { UnionFieldInit = FD; } 2420 2421 // Explicit InitListExpr's originate from source code (and have valid source 2422 // locations). Implicit InitListExpr's are created by the semantic analyzer. 2423 bool isExplicit() { 2424 return LBraceLoc.isValid() && RBraceLoc.isValid(); 2425 } 2426 2427 SourceLocation getLBraceLoc() const { return LBraceLoc; } 2428 void setLBraceLoc(SourceLocation Loc) { LBraceLoc = Loc; } 2429 SourceLocation getRBraceLoc() const { return RBraceLoc; } 2430 void setRBraceLoc(SourceLocation Loc) { RBraceLoc = Loc; } 2431 2432 /// @brief Retrieve the initializer list that describes the 2433 /// syntactic form of the initializer. 2434 /// 2435 /// 2436 InitListExpr *getSyntacticForm() const { return SyntacticForm; } 2437 void setSyntacticForm(InitListExpr *Init) { SyntacticForm = Init; } 2438 2439 bool hadArrayRangeDesignator() const { return HadArrayRangeDesignator; } 2440 void sawArrayRangeDesignator(bool ARD = true) { 2441 HadArrayRangeDesignator = ARD; 2442 } 2443 2444 virtual SourceRange getSourceRange() const { 2445 return SourceRange(LBraceLoc, RBraceLoc); 2446 } 2447 static bool classof(const Stmt *T) { 2448 return T->getStmtClass() == InitListExprClass; 2449 } 2450 static bool classof(const InitListExpr *) { return true; } 2451 2452 // Iterators 2453 virtual child_iterator child_begin(); 2454 virtual child_iterator child_end(); 2455 2456 typedef std::vector<Stmt *>::iterator iterator; 2457 typedef std::vector<Stmt *>::reverse_iterator reverse_iterator; 2458 2459 iterator begin() { return InitExprs.begin(); } 2460 iterator end() { return InitExprs.end(); } 2461 reverse_iterator rbegin() { return InitExprs.rbegin(); } 2462 reverse_iterator rend() { return InitExprs.rend(); } 2463}; 2464 2465/// @brief Represents a C99 designated initializer expression. 2466/// 2467/// A designated initializer expression (C99 6.7.8) contains one or 2468/// more designators (which can be field designators, array 2469/// designators, or GNU array-range designators) followed by an 2470/// expression that initializes the field or element(s) that the 2471/// designators refer to. For example, given: 2472/// 2473/// @code 2474/// struct point { 2475/// double x; 2476/// double y; 2477/// }; 2478/// struct point ptarray[10] = { [2].y = 1.0, [2].x = 2.0, [0].x = 1.0 }; 2479/// @endcode 2480/// 2481/// The InitListExpr contains three DesignatedInitExprs, the first of 2482/// which covers @c [2].y=1.0. This DesignatedInitExpr will have two 2483/// designators, one array designator for @c [2] followed by one field 2484/// designator for @c .y. The initalization expression will be 1.0. 2485class DesignatedInitExpr : public Expr { 2486public: 2487 /// \brief Forward declaration of the Designator class. 2488 class Designator; 2489 2490private: 2491 /// The location of the '=' or ':' prior to the actual initializer 2492 /// expression. 2493 SourceLocation EqualOrColonLoc; 2494 2495 /// Whether this designated initializer used the GNU deprecated 2496 /// syntax rather than the C99 '=' syntax. 2497 bool GNUSyntax : 1; 2498 2499 /// The number of designators in this initializer expression. 2500 unsigned NumDesignators : 15; 2501 2502 /// \brief The designators in this designated initialization 2503 /// expression. 2504 Designator *Designators; 2505 2506 /// The number of subexpressions of this initializer expression, 2507 /// which contains both the initializer and any additional 2508 /// expressions used by array and array-range designators. 2509 unsigned NumSubExprs : 16; 2510 2511 2512 DesignatedInitExpr(QualType Ty, unsigned NumDesignators, 2513 const Designator *Designators, 2514 SourceLocation EqualOrColonLoc, bool GNUSyntax, 2515 Expr **IndexExprs, unsigned NumIndexExprs, 2516 Expr *Init); 2517 2518 explicit DesignatedInitExpr(unsigned NumSubExprs) 2519 : Expr(DesignatedInitExprClass, EmptyShell()), 2520 NumDesignators(0), Designators(0), NumSubExprs(NumSubExprs) { } 2521 2522protected: 2523 virtual void DoDestroy(ASTContext &C); 2524 2525public: 2526 /// A field designator, e.g., ".x". 2527 struct FieldDesignator { 2528 /// Refers to the field that is being initialized. The low bit 2529 /// of this field determines whether this is actually a pointer 2530 /// to an IdentifierInfo (if 1) or a FieldDecl (if 0). When 2531 /// initially constructed, a field designator will store an 2532 /// IdentifierInfo*. After semantic analysis has resolved that 2533 /// name, the field designator will instead store a FieldDecl*. 2534 uintptr_t NameOrField; 2535 2536 /// The location of the '.' in the designated initializer. 2537 unsigned DotLoc; 2538 2539 /// The location of the field name in the designated initializer. 2540 unsigned FieldLoc; 2541 }; 2542 2543 /// An array or GNU array-range designator, e.g., "[9]" or "[10..15]". 2544 struct ArrayOrRangeDesignator { 2545 /// Location of the first index expression within the designated 2546 /// initializer expression's list of subexpressions. 2547 unsigned Index; 2548 /// The location of the '[' starting the array range designator. 2549 unsigned LBracketLoc; 2550 /// The location of the ellipsis separating the start and end 2551 /// indices. Only valid for GNU array-range designators. 2552 unsigned EllipsisLoc; 2553 /// The location of the ']' terminating the array range designator. 2554 unsigned RBracketLoc; 2555 }; 2556 2557 /// @brief Represents a single C99 designator. 2558 /// 2559 /// @todo This class is infuriatingly similar to clang::Designator, 2560 /// but minor differences (storing indices vs. storing pointers) 2561 /// keep us from reusing it. Try harder, later, to rectify these 2562 /// differences. 2563 class Designator { 2564 /// @brief The kind of designator this describes. 2565 enum { 2566 FieldDesignator, 2567 ArrayDesignator, 2568 ArrayRangeDesignator 2569 } Kind; 2570 2571 union { 2572 /// A field designator, e.g., ".x". 2573 struct FieldDesignator Field; 2574 /// An array or GNU array-range designator, e.g., "[9]" or "[10..15]". 2575 struct ArrayOrRangeDesignator ArrayOrRange; 2576 }; 2577 friend class DesignatedInitExpr; 2578 2579 public: 2580 Designator() {} 2581 2582 /// @brief Initializes a field designator. 2583 Designator(const IdentifierInfo *FieldName, SourceLocation DotLoc, 2584 SourceLocation FieldLoc) 2585 : Kind(FieldDesignator) { 2586 Field.NameOrField = reinterpret_cast<uintptr_t>(FieldName) | 0x01; 2587 Field.DotLoc = DotLoc.getRawEncoding(); 2588 Field.FieldLoc = FieldLoc.getRawEncoding(); 2589 } 2590 2591 /// @brief Initializes an array designator. 2592 Designator(unsigned Index, SourceLocation LBracketLoc, 2593 SourceLocation RBracketLoc) 2594 : Kind(ArrayDesignator) { 2595 ArrayOrRange.Index = Index; 2596 ArrayOrRange.LBracketLoc = LBracketLoc.getRawEncoding(); 2597 ArrayOrRange.EllipsisLoc = SourceLocation().getRawEncoding(); 2598 ArrayOrRange.RBracketLoc = RBracketLoc.getRawEncoding(); 2599 } 2600 2601 /// @brief Initializes a GNU array-range designator. 2602 Designator(unsigned Index, SourceLocation LBracketLoc, 2603 SourceLocation EllipsisLoc, SourceLocation RBracketLoc) 2604 : Kind(ArrayRangeDesignator) { 2605 ArrayOrRange.Index = Index; 2606 ArrayOrRange.LBracketLoc = LBracketLoc.getRawEncoding(); 2607 ArrayOrRange.EllipsisLoc = EllipsisLoc.getRawEncoding(); 2608 ArrayOrRange.RBracketLoc = RBracketLoc.getRawEncoding(); 2609 } 2610 2611 bool isFieldDesignator() const { return Kind == FieldDesignator; } 2612 bool isArrayDesignator() const { return Kind == ArrayDesignator; } 2613 bool isArrayRangeDesignator() const { return Kind == ArrayRangeDesignator; } 2614 2615 IdentifierInfo * getFieldName(); 2616 2617 FieldDecl *getField() { 2618 assert(Kind == FieldDesignator && "Only valid on a field designator"); 2619 if (Field.NameOrField & 0x01) 2620 return 0; 2621 else 2622 return reinterpret_cast<FieldDecl *>(Field.NameOrField); 2623 } 2624 2625 void setField(FieldDecl *FD) { 2626 assert(Kind == FieldDesignator && "Only valid on a field designator"); 2627 Field.NameOrField = reinterpret_cast<uintptr_t>(FD); 2628 } 2629 2630 SourceLocation getDotLoc() const { 2631 assert(Kind == FieldDesignator && "Only valid on a field designator"); 2632 return SourceLocation::getFromRawEncoding(Field.DotLoc); 2633 } 2634 2635 SourceLocation getFieldLoc() const { 2636 assert(Kind == FieldDesignator && "Only valid on a field designator"); 2637 return SourceLocation::getFromRawEncoding(Field.FieldLoc); 2638 } 2639 2640 SourceLocation getLBracketLoc() const { 2641 assert((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && 2642 "Only valid on an array or array-range designator"); 2643 return SourceLocation::getFromRawEncoding(ArrayOrRange.LBracketLoc); 2644 } 2645 2646 SourceLocation getRBracketLoc() const { 2647 assert((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && 2648 "Only valid on an array or array-range designator"); 2649 return SourceLocation::getFromRawEncoding(ArrayOrRange.RBracketLoc); 2650 } 2651 2652 SourceLocation getEllipsisLoc() const { 2653 assert(Kind == ArrayRangeDesignator && 2654 "Only valid on an array-range designator"); 2655 return SourceLocation::getFromRawEncoding(ArrayOrRange.EllipsisLoc); 2656 } 2657 2658 unsigned getFirstExprIndex() const { 2659 assert((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && 2660 "Only valid on an array or array-range designator"); 2661 return ArrayOrRange.Index; 2662 } 2663 2664 SourceLocation getStartLocation() const { 2665 if (Kind == FieldDesignator) 2666 return getDotLoc().isInvalid()? getFieldLoc() : getDotLoc(); 2667 else 2668 return getLBracketLoc(); 2669 } 2670 }; 2671 2672 static DesignatedInitExpr *Create(ASTContext &C, Designator *Designators, 2673 unsigned NumDesignators, 2674 Expr **IndexExprs, unsigned NumIndexExprs, 2675 SourceLocation EqualOrColonLoc, 2676 bool GNUSyntax, Expr *Init); 2677 2678 static DesignatedInitExpr *CreateEmpty(ASTContext &C, unsigned NumIndexExprs); 2679 2680 /// @brief Returns the number of designators in this initializer. 2681 unsigned size() const { return NumDesignators; } 2682 2683 // Iterator access to the designators. 2684 typedef Designator* designators_iterator; 2685 designators_iterator designators_begin() { return Designators; } 2686 designators_iterator designators_end() { 2687 return Designators + NumDesignators; 2688 } 2689 2690 Designator *getDesignator(unsigned Idx) { return &designators_begin()[Idx]; } 2691 2692 void setDesignators(const Designator *Desigs, unsigned NumDesigs); 2693 2694 Expr *getArrayIndex(const Designator& D); 2695 Expr *getArrayRangeStart(const Designator& D); 2696 Expr *getArrayRangeEnd(const Designator& D); 2697 2698 /// @brief Retrieve the location of the '=' that precedes the 2699 /// initializer value itself, if present. 2700 SourceLocation getEqualOrColonLoc() const { return EqualOrColonLoc; } 2701 void setEqualOrColonLoc(SourceLocation L) { EqualOrColonLoc = L; } 2702 2703 /// @brief Determines whether this designated initializer used the 2704 /// deprecated GNU syntax for designated initializers. 2705 bool usesGNUSyntax() const { return GNUSyntax; } 2706 void setGNUSyntax(bool GNU) { GNUSyntax = GNU; } 2707 2708 /// @brief Retrieve the initializer value. 2709 Expr *getInit() const { 2710 return cast<Expr>(*const_cast<DesignatedInitExpr*>(this)->child_begin()); 2711 } 2712 2713 void setInit(Expr *init) { 2714 *child_begin() = init; 2715 } 2716 2717 /// \brief Retrieve the total number of subexpressions in this 2718 /// designated initializer expression, including the actual 2719 /// initialized value and any expressions that occur within array 2720 /// and array-range designators. 2721 unsigned getNumSubExprs() const { return NumSubExprs; } 2722 2723 Expr *getSubExpr(unsigned Idx) { 2724 assert(Idx < NumSubExprs && "Subscript out of range"); 2725 char* Ptr = static_cast<char*>(static_cast<void *>(this)); 2726 Ptr += sizeof(DesignatedInitExpr); 2727 return reinterpret_cast<Expr**>(reinterpret_cast<void**>(Ptr))[Idx]; 2728 } 2729 2730 void setSubExpr(unsigned Idx, Expr *E) { 2731 assert(Idx < NumSubExprs && "Subscript out of range"); 2732 char* Ptr = static_cast<char*>(static_cast<void *>(this)); 2733 Ptr += sizeof(DesignatedInitExpr); 2734 reinterpret_cast<Expr**>(reinterpret_cast<void**>(Ptr))[Idx] = E; 2735 } 2736 2737 /// \brief Replaces the designator at index @p Idx with the series 2738 /// of designators in [First, Last). 2739 void ExpandDesignator(unsigned Idx, const Designator *First, 2740 const Designator *Last); 2741 2742 virtual SourceRange getSourceRange() const; 2743 2744 static bool classof(const Stmt *T) { 2745 return T->getStmtClass() == DesignatedInitExprClass; 2746 } 2747 static bool classof(const DesignatedInitExpr *) { return true; } 2748 2749 // Iterators 2750 virtual child_iterator child_begin(); 2751 virtual child_iterator child_end(); 2752}; 2753 2754/// \brief Represents an implicitly-generated value initialization of 2755/// an object of a given type. 2756/// 2757/// Implicit value initializations occur within semantic initializer 2758/// list expressions (InitListExpr) as placeholders for subobject 2759/// initializations not explicitly specified by the user. 2760/// 2761/// \see InitListExpr 2762class ImplicitValueInitExpr : public Expr { 2763public: 2764 explicit ImplicitValueInitExpr(QualType ty) 2765 : Expr(ImplicitValueInitExprClass, ty) { } 2766 2767 /// \brief Construct an empty implicit value initialization. 2768 explicit ImplicitValueInitExpr(EmptyShell Empty) 2769 : Expr(ImplicitValueInitExprClass, Empty) { } 2770 2771 static bool classof(const Stmt *T) { 2772 return T->getStmtClass() == ImplicitValueInitExprClass; 2773 } 2774 static bool classof(const ImplicitValueInitExpr *) { return true; } 2775 2776 virtual SourceRange getSourceRange() const { 2777 return SourceRange(); 2778 } 2779 2780 // Iterators 2781 virtual child_iterator child_begin(); 2782 virtual child_iterator child_end(); 2783}; 2784 2785 2786class ParenListExpr : public Expr { 2787 Stmt **Exprs; 2788 unsigned NumExprs; 2789 SourceLocation LParenLoc, RParenLoc; 2790 2791protected: 2792 virtual void DoDestroy(ASTContext& C); 2793 2794public: 2795 ParenListExpr(ASTContext& C, SourceLocation lparenloc, Expr **exprs, 2796 unsigned numexprs, SourceLocation rparenloc); 2797 2798 ~ParenListExpr() {} 2799 2800 /// \brief Build an empty paren list. 2801 //explicit ParenListExpr(EmptyShell Empty) : Expr(ParenListExprClass, Empty) { } 2802 2803 unsigned getNumExprs() const { return NumExprs; } 2804 2805 const Expr* getExpr(unsigned Init) const { 2806 assert(Init < getNumExprs() && "Initializer access out of range!"); 2807 return cast_or_null<Expr>(Exprs[Init]); 2808 } 2809 2810 Expr* getExpr(unsigned Init) { 2811 assert(Init < getNumExprs() && "Initializer access out of range!"); 2812 return cast_or_null<Expr>(Exprs[Init]); 2813 } 2814 2815 Expr **getExprs() { return reinterpret_cast<Expr **>(Exprs); } 2816 2817 SourceLocation getLParenLoc() const { return LParenLoc; } 2818 SourceLocation getRParenLoc() const { return RParenLoc; } 2819 2820 virtual SourceRange getSourceRange() const { 2821 return SourceRange(LParenLoc, RParenLoc); 2822 } 2823 static bool classof(const Stmt *T) { 2824 return T->getStmtClass() == ParenListExprClass; 2825 } 2826 static bool classof(const ParenListExpr *) { return true; } 2827 2828 // Iterators 2829 virtual child_iterator child_begin(); 2830 virtual child_iterator child_end(); 2831}; 2832 2833 2834//===----------------------------------------------------------------------===// 2835// Clang Extensions 2836//===----------------------------------------------------------------------===// 2837 2838 2839/// ExtVectorElementExpr - This represents access to specific elements of a 2840/// vector, and may occur on the left hand side or right hand side. For example 2841/// the following is legal: "V.xy = V.zw" if V is a 4 element extended vector. 2842/// 2843/// Note that the base may have either vector or pointer to vector type, just 2844/// like a struct field reference. 2845/// 2846class ExtVectorElementExpr : public Expr { 2847 Stmt *Base; 2848 IdentifierInfo *Accessor; 2849 SourceLocation AccessorLoc; 2850public: 2851 ExtVectorElementExpr(QualType ty, Expr *base, IdentifierInfo &accessor, 2852 SourceLocation loc) 2853 : Expr(ExtVectorElementExprClass, ty), 2854 Base(base), Accessor(&accessor), AccessorLoc(loc) {} 2855 2856 /// \brief Build an empty vector element expression. 2857 explicit ExtVectorElementExpr(EmptyShell Empty) 2858 : Expr(ExtVectorElementExprClass, Empty) { } 2859 2860 const Expr *getBase() const { return cast<Expr>(Base); } 2861 Expr *getBase() { return cast<Expr>(Base); } 2862 void setBase(Expr *E) { Base = E; } 2863 2864 IdentifierInfo &getAccessor() const { return *Accessor; } 2865 void setAccessor(IdentifierInfo *II) { Accessor = II; } 2866 2867 SourceLocation getAccessorLoc() const { return AccessorLoc; } 2868 void setAccessorLoc(SourceLocation L) { AccessorLoc = L; } 2869 2870 /// getNumElements - Get the number of components being selected. 2871 unsigned getNumElements() const; 2872 2873 /// containsDuplicateElements - Return true if any element access is 2874 /// repeated. 2875 bool containsDuplicateElements() const; 2876 2877 /// getEncodedElementAccess - Encode the elements accessed into an llvm 2878 /// aggregate Constant of ConstantInt(s). 2879 void getEncodedElementAccess(llvm::SmallVectorImpl<unsigned> &Elts) const; 2880 2881 virtual SourceRange getSourceRange() const { 2882 return SourceRange(getBase()->getLocStart(), AccessorLoc); 2883 } 2884 2885 /// isArrow - Return true if the base expression is a pointer to vector, 2886 /// return false if the base expression is a vector. 2887 bool isArrow() const; 2888 2889 static bool classof(const Stmt *T) { 2890 return T->getStmtClass() == ExtVectorElementExprClass; 2891 } 2892 static bool classof(const ExtVectorElementExpr *) { return true; } 2893 2894 // Iterators 2895 virtual child_iterator child_begin(); 2896 virtual child_iterator child_end(); 2897}; 2898 2899 2900/// BlockExpr - Adaptor class for mixing a BlockDecl with expressions. 2901/// ^{ statement-body } or ^(int arg1, float arg2){ statement-body } 2902class BlockExpr : public Expr { 2903protected: 2904 BlockDecl *TheBlock; 2905 bool HasBlockDeclRefExprs; 2906public: 2907 BlockExpr(BlockDecl *BD, QualType ty, bool hasBlockDeclRefExprs) 2908 : Expr(BlockExprClass, ty), 2909 TheBlock(BD), HasBlockDeclRefExprs(hasBlockDeclRefExprs) {} 2910 2911 /// \brief Build an empty block expression. 2912 explicit BlockExpr(EmptyShell Empty) : Expr(BlockExprClass, Empty) { } 2913 2914 const BlockDecl *getBlockDecl() const { return TheBlock; } 2915 BlockDecl *getBlockDecl() { return TheBlock; } 2916 void setBlockDecl(BlockDecl *BD) { TheBlock = BD; } 2917 2918 // Convenience functions for probing the underlying BlockDecl. 2919 SourceLocation getCaretLocation() const; 2920 const Stmt *getBody() const; 2921 Stmt *getBody(); 2922 2923 virtual SourceRange getSourceRange() const { 2924 return SourceRange(getCaretLocation(), getBody()->getLocEnd()); 2925 } 2926 2927 /// getFunctionType - Return the underlying function type for this block. 2928 const FunctionType *getFunctionType() const; 2929 2930 /// hasBlockDeclRefExprs - Return true iff the block has BlockDeclRefExpr 2931 /// inside of the block that reference values outside the block. 2932 bool hasBlockDeclRefExprs() const { return HasBlockDeclRefExprs; } 2933 void setHasBlockDeclRefExprs(bool BDRE) { HasBlockDeclRefExprs = BDRE; } 2934 2935 static bool classof(const Stmt *T) { 2936 return T->getStmtClass() == BlockExprClass; 2937 } 2938 static bool classof(const BlockExpr *) { return true; } 2939 2940 // Iterators 2941 virtual child_iterator child_begin(); 2942 virtual child_iterator child_end(); 2943}; 2944 2945/// BlockDeclRefExpr - A reference to a declared variable, function, 2946/// enum, etc. 2947class BlockDeclRefExpr : public Expr { 2948 ValueDecl *D; 2949 SourceLocation Loc; 2950 bool IsByRef : 1; 2951 bool ConstQualAdded : 1; 2952public: 2953 BlockDeclRefExpr(ValueDecl *d, QualType t, SourceLocation l, bool ByRef, 2954 bool constAdded = false) : 2955 Expr(BlockDeclRefExprClass, t), D(d), Loc(l), IsByRef(ByRef), 2956 ConstQualAdded(constAdded) {} 2957 2958 // \brief Build an empty reference to a declared variable in a 2959 // block. 2960 explicit BlockDeclRefExpr(EmptyShell Empty) 2961 : Expr(BlockDeclRefExprClass, Empty) { } 2962 2963 ValueDecl *getDecl() { return D; } 2964 const ValueDecl *getDecl() const { return D; } 2965 void setDecl(ValueDecl *VD) { D = VD; } 2966 2967 SourceLocation getLocation() const { return Loc; } 2968 void setLocation(SourceLocation L) { Loc = L; } 2969 2970 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 2971 2972 bool isByRef() const { return IsByRef; } 2973 void setByRef(bool BR) { IsByRef = BR; } 2974 2975 bool isConstQualAdded() const { return ConstQualAdded; } 2976 void setConstQualAdded(bool C) { ConstQualAdded = C; } 2977 2978 static bool classof(const Stmt *T) { 2979 return T->getStmtClass() == BlockDeclRefExprClass; 2980 } 2981 static bool classof(const BlockDeclRefExpr *) { return true; } 2982 2983 // Iterators 2984 virtual child_iterator child_begin(); 2985 virtual child_iterator child_end(); 2986}; 2987 2988} // end namespace clang 2989 2990#endif 2991