Expr.h revision 3fa5cae9b3812cab9fab6c042c3329bb70a3d046
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 "clang/AST/DeclAccessPair.h" 21#include "clang/AST/OperationKinds.h" 22#include "clang/AST/ASTVector.h" 23#include "clang/AST/UsuallyTinyPtrVector.h" 24#include "llvm/ADT/APSInt.h" 25#include "llvm/ADT/APFloat.h" 26#include "llvm/ADT/SmallVector.h" 27#include "llvm/ADT/StringRef.h" 28#include <vector> 29 30namespace clang { 31 class ASTContext; 32 class APValue; 33 class Decl; 34 class IdentifierInfo; 35 class ParmVarDecl; 36 class NamedDecl; 37 class ValueDecl; 38 class BlockDecl; 39 class CXXBaseSpecifier; 40 class CXXOperatorCallExpr; 41 class CXXMemberCallExpr; 42 class TemplateArgumentLoc; 43 class TemplateArgumentListInfo; 44 45/// \brief A simple array of base specifiers. 46typedef llvm::SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 47 48/// Expr - This represents one expression. Note that Expr's are subclasses of 49/// Stmt. This allows an expression to be transparently used any place a Stmt 50/// is required. 51/// 52class Expr : public Stmt { 53 QualType TR; 54 55 virtual void ANCHOR(); // key function. 56protected: 57 /// TypeDependent - Whether this expression is type-dependent 58 /// (C++ [temp.dep.expr]). 59 bool TypeDependent : 1; 60 61 /// ValueDependent - Whether this expression is value-dependent 62 /// (C++ [temp.dep.constexpr]). 63 bool ValueDependent : 1; 64 65 /// ValueKind - The value classification of this expression. 66 /// Only actually used by certain subclasses. 67 unsigned ValueKind : 2; 68 69 enum { BitsRemaining = 28 }; 70 71 Expr(StmtClass SC, QualType T, bool TD, bool VD) 72 : Stmt(SC), TypeDependent(TD), ValueDependent(VD), ValueKind(0) { 73 setType(T); 74 } 75 76 /// \brief Construct an empty expression. 77 explicit Expr(StmtClass SC, EmptyShell) : Stmt(SC) { } 78 79public: 80 QualType getType() const { return TR; } 81 void setType(QualType t) { 82 // In C++, the type of an expression is always adjusted so that it 83 // will not have reference type an expression will never have 84 // reference type (C++ [expr]p6). Use 85 // QualType::getNonReferenceType() to retrieve the non-reference 86 // type. Additionally, inspect Expr::isLvalue to determine whether 87 // an expression that is adjusted in this manner should be 88 // considered an lvalue. 89 assert((t.isNull() || !t->isReferenceType()) && 90 "Expressions can't have reference type"); 91 92 TR = t; 93 } 94 95 /// isValueDependent - Determines whether this expression is 96 /// value-dependent (C++ [temp.dep.constexpr]). For example, the 97 /// array bound of "Chars" in the following example is 98 /// value-dependent. 99 /// @code 100 /// template<int Size, char (&Chars)[Size]> struct meta_string; 101 /// @endcode 102 bool isValueDependent() const { return ValueDependent; } 103 104 /// \brief Set whether this expression is value-dependent or not. 105 void setValueDependent(bool VD) { ValueDependent = VD; } 106 107 /// isTypeDependent - Determines whether this expression is 108 /// type-dependent (C++ [temp.dep.expr]), which means that its type 109 /// could change from one template instantiation to the next. For 110 /// example, the expressions "x" and "x + y" are type-dependent in 111 /// the following code, but "y" is not type-dependent: 112 /// @code 113 /// template<typename T> 114 /// void add(T x, int y) { 115 /// x + y; 116 /// } 117 /// @endcode 118 bool isTypeDependent() const { return TypeDependent; } 119 120 /// \brief Set whether this expression is type-dependent or not. 121 void setTypeDependent(bool TD) { TypeDependent = TD; } 122 123 /// SourceLocation tokens are not useful in isolation - they are low level 124 /// value objects created/interpreted by SourceManager. We assume AST 125 /// clients will have a pointer to the respective SourceManager. 126 virtual SourceRange getSourceRange() const = 0; 127 128 /// getExprLoc - Return the preferred location for the arrow when diagnosing 129 /// a problem with a generic expression. 130 virtual SourceLocation getExprLoc() const { return getLocStart(); } 131 132 /// isUnusedResultAWarning - Return true if this immediate expression should 133 /// be warned about if the result is unused. If so, fill in Loc and Ranges 134 /// with location to warn on and the source range[s] to report with the 135 /// warning. 136 bool isUnusedResultAWarning(SourceLocation &Loc, SourceRange &R1, 137 SourceRange &R2, ASTContext &Ctx) const; 138 139 /// isLvalue - C99 6.3.2.1: an lvalue is an expression with an object type or 140 /// incomplete type other than void. Nonarray expressions that can be lvalues: 141 /// - name, where name must be a variable 142 /// - e[i] 143 /// - (e), where e must be an lvalue 144 /// - e.name, where e must be an lvalue 145 /// - e->name 146 /// - *e, the type of e cannot be a function type 147 /// - string-constant 148 /// - reference type [C++ [expr]] 149 /// - b ? x : y, where x and y are lvalues of suitable types [C++] 150 /// 151 enum isLvalueResult { 152 LV_Valid, 153 LV_NotObjectType, 154 LV_IncompleteVoidType, 155 LV_DuplicateVectorComponents, 156 LV_InvalidExpression, 157 LV_MemberFunction, 158 LV_SubObjCPropertySetting, 159 LV_ClassTemporary 160 }; 161 isLvalueResult isLvalue(ASTContext &Ctx) const; 162 163 /// isModifiableLvalue - C99 6.3.2.1: an lvalue that does not have array type, 164 /// does not have an incomplete type, does not have a const-qualified type, 165 /// and if it is a structure or union, does not have any member (including, 166 /// recursively, any member or element of all contained aggregates or unions) 167 /// with a const-qualified type. 168 /// 169 /// \param Loc [in] [out] - A source location which *may* be filled 170 /// in with the location of the expression making this a 171 /// non-modifiable lvalue, if specified. 172 enum isModifiableLvalueResult { 173 MLV_Valid, 174 MLV_NotObjectType, 175 MLV_IncompleteVoidType, 176 MLV_DuplicateVectorComponents, 177 MLV_InvalidExpression, 178 MLV_LValueCast, // Specialized form of MLV_InvalidExpression. 179 MLV_IncompleteType, 180 MLV_ConstQualified, 181 MLV_ArrayType, 182 MLV_NotBlockQualified, 183 MLV_ReadonlyProperty, 184 MLV_NoSetterProperty, 185 MLV_MemberFunction, 186 MLV_SubObjCPropertySetting, 187 MLV_ClassTemporary 188 }; 189 isModifiableLvalueResult isModifiableLvalue(ASTContext &Ctx, 190 SourceLocation *Loc = 0) const; 191 192 /// \brief The return type of classify(). Represents the C++0x expression 193 /// taxonomy. 194 class Classification { 195 public: 196 /// \brief The various classification results. Most of these mean prvalue. 197 enum Kinds { 198 CL_LValue, 199 CL_XValue, 200 CL_Function, // Functions cannot be lvalues in C. 201 CL_Void, // Void cannot be an lvalue in C. 202 CL_DuplicateVectorComponents, // A vector shuffle with dupes. 203 CL_MemberFunction, // An expression referring to a member function 204 CL_SubObjCPropertySetting, 205 CL_ClassTemporary, // A prvalue of class type 206 CL_PRValue // A prvalue for any other reason, of any other type 207 }; 208 /// \brief The results of modification testing. 209 enum ModifiableType { 210 CM_Untested, // testModifiable was false. 211 CM_Modifiable, 212 CM_RValue, // Not modifiable because it's an rvalue 213 CM_Function, // Not modifiable because it's a function; C++ only 214 CM_LValueCast, // Same as CM_RValue, but indicates GCC cast-as-lvalue ext 215 CM_NotBlockQualified, // Not captured in the closure 216 CM_NoSetterProperty,// Implicit assignment to ObjC property without setter 217 CM_ConstQualified, 218 CM_ArrayType, 219 CM_IncompleteType 220 }; 221 222 private: 223 friend class Expr; 224 225 unsigned short Kind; 226 unsigned short Modifiable; 227 228 explicit Classification(Kinds k, ModifiableType m) 229 : Kind(k), Modifiable(m) 230 {} 231 232 public: 233 Classification() {} 234 235 Kinds getKind() const { return static_cast<Kinds>(Kind); } 236 ModifiableType getModifiable() const { 237 assert(Modifiable != CM_Untested && "Did not test for modifiability."); 238 return static_cast<ModifiableType>(Modifiable); 239 } 240 bool isLValue() const { return Kind == CL_LValue; } 241 bool isXValue() const { return Kind == CL_XValue; } 242 bool isGLValue() const { return Kind <= CL_XValue; } 243 bool isPRValue() const { return Kind >= CL_Function; } 244 bool isRValue() const { return Kind >= CL_XValue; } 245 bool isModifiable() const { return getModifiable() == CM_Modifiable; } 246 }; 247 /// \brief Classify - Classify this expression according to the C++0x 248 /// expression taxonomy. 249 /// 250 /// C++0x defines ([basic.lval]) a new taxonomy of expressions to replace the 251 /// old lvalue vs rvalue. This function determines the type of expression this 252 /// is. There are three expression types: 253 /// - lvalues are classical lvalues as in C++03. 254 /// - prvalues are equivalent to rvalues in C++03. 255 /// - xvalues are expressions yielding unnamed rvalue references, e.g. a 256 /// function returning an rvalue reference. 257 /// lvalues and xvalues are collectively referred to as glvalues, while 258 /// prvalues and xvalues together form rvalues. 259 Classification Classify(ASTContext &Ctx) const { 260 return ClassifyImpl(Ctx, 0); 261 } 262 263 /// \brief ClassifyModifiable - Classify this expression according to the 264 /// C++0x expression taxonomy, and see if it is valid on the left side 265 /// of an assignment. 266 /// 267 /// This function extends classify in that it also tests whether the 268 /// expression is modifiable (C99 6.3.2.1p1). 269 /// \param Loc A source location that might be filled with a relevant location 270 /// if the expression is not modifiable. 271 Classification ClassifyModifiable(ASTContext &Ctx, SourceLocation &Loc) const{ 272 return ClassifyImpl(Ctx, &Loc); 273 } 274 275private: 276 Classification ClassifyImpl(ASTContext &Ctx, SourceLocation *Loc) const; 277 278public: 279 280 /// \brief If this expression refers to a bit-field, retrieve the 281 /// declaration of that bit-field. 282 FieldDecl *getBitField(); 283 284 const FieldDecl *getBitField() const { 285 return const_cast<Expr*>(this)->getBitField(); 286 } 287 288 /// \brief Returns whether this expression refers to a vector element. 289 bool refersToVectorElement() const; 290 291 /// isKnownToHaveBooleanValue - Return true if this is an integer expression 292 /// that is known to return 0 or 1. This happens for _Bool/bool expressions 293 /// but also int expressions which are produced by things like comparisons in 294 /// C. 295 bool isKnownToHaveBooleanValue() const; 296 297 /// isIntegerConstantExpr - Return true if this expression is a valid integer 298 /// constant expression, and, if so, return its value in Result. If not a 299 /// valid i-c-e, return false and fill in Loc (if specified) with the location 300 /// of the invalid expression. 301 bool isIntegerConstantExpr(llvm::APSInt &Result, ASTContext &Ctx, 302 SourceLocation *Loc = 0, 303 bool isEvaluated = true) const; 304 bool isIntegerConstantExpr(ASTContext &Ctx, SourceLocation *Loc = 0) const { 305 llvm::APSInt X; 306 return isIntegerConstantExpr(X, Ctx, Loc); 307 } 308 /// isConstantInitializer - Returns true if this expression is a constant 309 /// initializer, which can be emitted at compile-time. 310 bool isConstantInitializer(ASTContext &Ctx, bool ForRef) const; 311 312 /// EvalResult is a struct with detailed info about an evaluated expression. 313 struct EvalResult { 314 /// Val - This is the value the expression can be folded to. 315 APValue Val; 316 317 /// HasSideEffects - Whether the evaluated expression has side effects. 318 /// For example, (f() && 0) can be folded, but it still has side effects. 319 bool HasSideEffects; 320 321 /// Diag - If the expression is unfoldable, then Diag contains a note 322 /// diagnostic indicating why it's not foldable. DiagLoc indicates a caret 323 /// position for the error, and DiagExpr is the expression that caused 324 /// the error. 325 /// If the expression is foldable, but not an integer constant expression, 326 /// Diag contains a note diagnostic that describes why it isn't an integer 327 /// constant expression. If the expression *is* an integer constant 328 /// expression, then Diag will be zero. 329 unsigned Diag; 330 const Expr *DiagExpr; 331 SourceLocation DiagLoc; 332 333 EvalResult() : HasSideEffects(false), Diag(0), DiagExpr(0) {} 334 335 // isGlobalLValue - Return true if the evaluated lvalue expression 336 // is global. 337 bool isGlobalLValue() const; 338 // hasSideEffects - Return true if the evaluated expression has 339 // side effects. 340 bool hasSideEffects() const { 341 return HasSideEffects; 342 } 343 }; 344 345 /// Evaluate - Return true if this is a constant which we can fold using 346 /// any crazy technique (that has nothing to do with language standards) that 347 /// we want to. If this function returns true, it returns the folded constant 348 /// in Result. 349 bool Evaluate(EvalResult &Result, ASTContext &Ctx) const; 350 351 /// EvaluateAsBooleanCondition - Return true if this is a constant 352 /// which we we can fold and convert to a boolean condition using 353 /// any crazy technique that we want to. 354 bool EvaluateAsBooleanCondition(bool &Result, ASTContext &Ctx) const; 355 356 /// isEvaluatable - Call Evaluate to see if this expression can be constant 357 /// folded, but discard the result. 358 bool isEvaluatable(ASTContext &Ctx) const; 359 360 /// HasSideEffects - This routine returns true for all those expressions 361 /// which must be evaluated each time and must not be optimized away 362 /// or evaluated at compile time. Example is a function call, volatile 363 /// variable read. 364 bool HasSideEffects(ASTContext &Ctx) const; 365 366 /// EvaluateAsInt - Call Evaluate and return the folded integer. This 367 /// must be called on an expression that constant folds to an integer. 368 llvm::APSInt EvaluateAsInt(ASTContext &Ctx) const; 369 370 /// EvaluateAsLValue - Evaluate an expression to see if it's a lvalue 371 /// with link time known address. 372 bool EvaluateAsLValue(EvalResult &Result, ASTContext &Ctx) const; 373 374 /// EvaluateAsLValue - Evaluate an expression to see if it's a lvalue. 375 bool EvaluateAsAnyLValue(EvalResult &Result, ASTContext &Ctx) const; 376 377 /// \brief Enumeration used to describe how \c isNullPointerConstant() 378 /// should cope with value-dependent expressions. 379 enum NullPointerConstantValueDependence { 380 /// \brief Specifies that the expression should never be value-dependent. 381 NPC_NeverValueDependent = 0, 382 383 /// \brief Specifies that a value-dependent expression of integral or 384 /// dependent type should be considered a null pointer constant. 385 NPC_ValueDependentIsNull, 386 387 /// \brief Specifies that a value-dependent expression should be considered 388 /// to never be a null pointer constant. 389 NPC_ValueDependentIsNotNull 390 }; 391 392 /// isNullPointerConstant - C99 6.3.2.3p3 - Return true if this is either an 393 /// integer constant expression with the value zero, or if this is one that is 394 /// cast to void*. 395 bool isNullPointerConstant(ASTContext &Ctx, 396 NullPointerConstantValueDependence NPC) const; 397 398 /// isOBJCGCCandidate - Return true if this expression may be used in a read/ 399 /// write barrier. 400 bool isOBJCGCCandidate(ASTContext &Ctx) const; 401 402 /// \brief Result type of CanThrow(). 403 enum CanThrowResult { 404 CT_Cannot, 405 CT_Dependent, 406 CT_Can 407 }; 408 /// \brief Test if this expression, if evaluated, might throw, according to 409 /// the rules of C++ [expr.unary.noexcept]. 410 CanThrowResult CanThrow(ASTContext &C) const; 411 412 /// IgnoreParens - Ignore parentheses. If this Expr is a ParenExpr, return 413 /// its subexpression. If that subexpression is also a ParenExpr, 414 /// then this method recursively returns its subexpression, and so forth. 415 /// Otherwise, the method returns the current Expr. 416 Expr *IgnoreParens(); 417 418 /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr 419 /// or CastExprs, returning their operand. 420 Expr *IgnoreParenCasts(); 421 422 /// IgnoreParenImpCasts - Ignore parentheses and implicit casts. Strip off any 423 /// ParenExpr or ImplicitCastExprs, returning their operand. 424 Expr *IgnoreParenImpCasts(); 425 426 const Expr *IgnoreParenImpCasts() const { 427 return const_cast<Expr*>(this)->IgnoreParenImpCasts(); 428 } 429 430 /// IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the 431 /// value (including ptr->int casts of the same size). Strip off any 432 /// ParenExpr or CastExprs, returning their operand. 433 Expr *IgnoreParenNoopCasts(ASTContext &Ctx); 434 435 /// \brief Determine whether this expression is a default function argument. 436 /// 437 /// Default arguments are implicitly generated in the abstract syntax tree 438 /// by semantic analysis for function calls, object constructions, etc. in 439 /// C++. Default arguments are represented by \c CXXDefaultArgExpr nodes; 440 /// this routine also looks through any implicit casts to determine whether 441 /// the expression is a default argument. 442 bool isDefaultArgument() const; 443 444 /// \brief Determine whether the result of this expression is a 445 /// temporary object of the given class type. 446 bool isTemporaryObject(ASTContext &Ctx, const CXXRecordDecl *TempTy) const; 447 448 const Expr *IgnoreParens() const { 449 return const_cast<Expr*>(this)->IgnoreParens(); 450 } 451 const Expr *IgnoreParenCasts() const { 452 return const_cast<Expr*>(this)->IgnoreParenCasts(); 453 } 454 const Expr *IgnoreParenNoopCasts(ASTContext &Ctx) const { 455 return const_cast<Expr*>(this)->IgnoreParenNoopCasts(Ctx); 456 } 457 458 static bool hasAnyTypeDependentArguments(Expr** Exprs, unsigned NumExprs); 459 static bool hasAnyValueDependentArguments(Expr** Exprs, unsigned NumExprs); 460 461 static bool classof(const Stmt *T) { 462 return T->getStmtClass() >= firstExprConstant && 463 T->getStmtClass() <= lastExprConstant; 464 } 465 static bool classof(const Expr *) { return true; } 466}; 467 468 469//===----------------------------------------------------------------------===// 470// Primary Expressions. 471//===----------------------------------------------------------------------===// 472 473/// \brief Represents the qualifier that may precede a C++ name, e.g., the 474/// "std::" in "std::sort". 475struct NameQualifier { 476 /// \brief The nested name specifier. 477 NestedNameSpecifier *NNS; 478 479 /// \brief The source range covered by the nested name specifier. 480 SourceRange Range; 481}; 482 483/// \brief Represents an explicit template argument list in C++, e.g., 484/// the "<int>" in "sort<int>". 485struct ExplicitTemplateArgumentList { 486 /// \brief The source location of the left angle bracket ('<'); 487 SourceLocation LAngleLoc; 488 489 /// \brief The source location of the right angle bracket ('>'); 490 SourceLocation RAngleLoc; 491 492 /// \brief The number of template arguments in TemplateArgs. 493 /// The actual template arguments (if any) are stored after the 494 /// ExplicitTemplateArgumentList structure. 495 unsigned NumTemplateArgs; 496 497 /// \brief Retrieve the template arguments 498 TemplateArgumentLoc *getTemplateArgs() { 499 return reinterpret_cast<TemplateArgumentLoc *> (this + 1); 500 } 501 502 /// \brief Retrieve the template arguments 503 const TemplateArgumentLoc *getTemplateArgs() const { 504 return reinterpret_cast<const TemplateArgumentLoc *> (this + 1); 505 } 506 507 void initializeFrom(const TemplateArgumentListInfo &List); 508 void copyInto(TemplateArgumentListInfo &List) const; 509 static std::size_t sizeFor(unsigned NumTemplateArgs); 510 static std::size_t sizeFor(const TemplateArgumentListInfo &List); 511}; 512 513/// DeclRefExpr - [C99 6.5.1p2] - A reference to a declared variable, function, 514/// enum, etc. 515class DeclRefExpr : public Expr { 516 enum { 517 // Flag on DecoratedD that specifies when this declaration reference 518 // expression has a C++ nested-name-specifier. 519 HasQualifierFlag = 0x01, 520 // Flag on DecoratedD that specifies when this declaration reference 521 // expression has an explicit C++ template argument list. 522 HasExplicitTemplateArgumentListFlag = 0x02 523 }; 524 525 // DecoratedD - The declaration that we are referencing, plus two bits to 526 // indicate whether (1) the declaration's name was explicitly qualified and 527 // (2) the declaration's name was followed by an explicit template 528 // argument list. 529 llvm::PointerIntPair<ValueDecl *, 2> DecoratedD; 530 531 // Loc - The location of the declaration name itself. 532 SourceLocation Loc; 533 534 /// DNLoc - Provides source/type location info for the 535 /// declaration name embedded in DecoratedD. 536 DeclarationNameLoc DNLoc; 537 538 /// \brief Retrieve the qualifier that preceded the declaration name, if any. 539 NameQualifier *getNameQualifier() { 540 if ((DecoratedD.getInt() & HasQualifierFlag) == 0) 541 return 0; 542 543 return reinterpret_cast<NameQualifier *> (this + 1); 544 } 545 546 /// \brief Retrieve the qualifier that preceded the member name, if any. 547 const NameQualifier *getNameQualifier() const { 548 return const_cast<DeclRefExpr *>(this)->getNameQualifier(); 549 } 550 551 DeclRefExpr(NestedNameSpecifier *Qualifier, SourceRange QualifierRange, 552 ValueDecl *D, SourceLocation NameLoc, 553 const TemplateArgumentListInfo *TemplateArgs, 554 QualType T); 555 556 DeclRefExpr(NestedNameSpecifier *Qualifier, SourceRange QualifierRange, 557 ValueDecl *D, const DeclarationNameInfo &NameInfo, 558 const TemplateArgumentListInfo *TemplateArgs, 559 QualType T); 560 561 /// \brief Construct an empty declaration reference expression. 562 explicit DeclRefExpr(EmptyShell Empty) 563 : Expr(DeclRefExprClass, Empty) { } 564 565 /// \brief Computes the type- and value-dependence flags for this 566 /// declaration reference expression. 567 void computeDependence(); 568 569public: 570 DeclRefExpr(ValueDecl *d, QualType t, SourceLocation l) : 571 Expr(DeclRefExprClass, t, false, false), DecoratedD(d, 0), Loc(l) { 572 computeDependence(); 573 } 574 575 static DeclRefExpr *Create(ASTContext &Context, 576 NestedNameSpecifier *Qualifier, 577 SourceRange QualifierRange, 578 ValueDecl *D, 579 SourceLocation NameLoc, 580 QualType T, 581 const TemplateArgumentListInfo *TemplateArgs = 0); 582 583 static DeclRefExpr *Create(ASTContext &Context, 584 NestedNameSpecifier *Qualifier, 585 SourceRange QualifierRange, 586 ValueDecl *D, 587 const DeclarationNameInfo &NameInfo, 588 QualType T, 589 const TemplateArgumentListInfo *TemplateArgs = 0); 590 591 /// \brief Construct an empty declaration reference expression. 592 static DeclRefExpr *CreateEmpty(ASTContext &Context, 593 bool HasQualifier, unsigned NumTemplateArgs); 594 595 ValueDecl *getDecl() { return DecoratedD.getPointer(); } 596 const ValueDecl *getDecl() const { return DecoratedD.getPointer(); } 597 void setDecl(ValueDecl *NewD) { DecoratedD.setPointer(NewD); } 598 599 DeclarationNameInfo getNameInfo() const { 600 return DeclarationNameInfo(getDecl()->getDeclName(), Loc, DNLoc); 601 } 602 603 SourceLocation getLocation() const { return Loc; } 604 void setLocation(SourceLocation L) { Loc = L; } 605 virtual SourceRange getSourceRange() const; 606 607 /// \brief Determine whether this declaration reference was preceded by a 608 /// C++ nested-name-specifier, e.g., \c N::foo. 609 bool hasQualifier() const { return DecoratedD.getInt() & HasQualifierFlag; } 610 611 /// \brief If the name was qualified, retrieves the source range of 612 /// the nested-name-specifier that precedes the name. Otherwise, 613 /// returns an empty source range. 614 SourceRange getQualifierRange() const { 615 if (!hasQualifier()) 616 return SourceRange(); 617 618 return getNameQualifier()->Range; 619 } 620 621 /// \brief If the name was qualified, retrieves the nested-name-specifier 622 /// that precedes the name. Otherwise, returns NULL. 623 NestedNameSpecifier *getQualifier() const { 624 if (!hasQualifier()) 625 return 0; 626 627 return getNameQualifier()->NNS; 628 } 629 630 bool hasExplicitTemplateArgs() const { 631 return (DecoratedD.getInt() & HasExplicitTemplateArgumentListFlag); 632 } 633 634 /// \brief Retrieve the explicit template argument list that followed the 635 /// member template name. 636 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 637 assert(hasExplicitTemplateArgs()); 638 639 if ((DecoratedD.getInt() & HasQualifierFlag) == 0) 640 return *reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 641 642 return *reinterpret_cast<ExplicitTemplateArgumentList *>( 643 getNameQualifier() + 1); 644 } 645 646 /// \brief Retrieve the explicit template argument list that followed the 647 /// member template name. 648 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 649 return const_cast<DeclRefExpr *>(this)->getExplicitTemplateArgs(); 650 } 651 652 /// \brief Retrieves the optional explicit template arguments. 653 /// This points to the same data as getExplicitTemplateArgs(), but 654 /// returns null if there are no explicit template arguments. 655 const ExplicitTemplateArgumentList *getExplicitTemplateArgsOpt() const { 656 if (!hasExplicitTemplateArgs()) return 0; 657 return &getExplicitTemplateArgs(); 658 } 659 660 /// \brief Copies the template arguments (if present) into the given 661 /// structure. 662 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 663 if (hasExplicitTemplateArgs()) 664 getExplicitTemplateArgs().copyInto(List); 665 } 666 667 /// \brief Retrieve the location of the left angle bracket following the 668 /// member name ('<'), if any. 669 SourceLocation getLAngleLoc() const { 670 if (!hasExplicitTemplateArgs()) 671 return SourceLocation(); 672 673 return getExplicitTemplateArgs().LAngleLoc; 674 } 675 676 /// \brief Retrieve the template arguments provided as part of this 677 /// template-id. 678 const TemplateArgumentLoc *getTemplateArgs() const { 679 if (!hasExplicitTemplateArgs()) 680 return 0; 681 682 return getExplicitTemplateArgs().getTemplateArgs(); 683 } 684 685 /// \brief Retrieve the number of template arguments provided as part of this 686 /// template-id. 687 unsigned getNumTemplateArgs() const { 688 if (!hasExplicitTemplateArgs()) 689 return 0; 690 691 return getExplicitTemplateArgs().NumTemplateArgs; 692 } 693 694 /// \brief Retrieve the location of the right angle bracket following the 695 /// template arguments ('>'). 696 SourceLocation getRAngleLoc() const { 697 if (!hasExplicitTemplateArgs()) 698 return SourceLocation(); 699 700 return getExplicitTemplateArgs().RAngleLoc; 701 } 702 703 static bool classof(const Stmt *T) { 704 return T->getStmtClass() == DeclRefExprClass; 705 } 706 static bool classof(const DeclRefExpr *) { return true; } 707 708 // Iterators 709 virtual child_iterator child_begin(); 710 virtual child_iterator child_end(); 711 712 friend class ASTStmtReader; 713 friend class ASTStmtWriter; 714}; 715 716/// PredefinedExpr - [C99 6.4.2.2] - A predefined identifier such as __func__. 717class PredefinedExpr : public Expr { 718public: 719 enum IdentType { 720 Func, 721 Function, 722 PrettyFunction, 723 /// PrettyFunctionNoVirtual - The same as PrettyFunction, except that the 724 /// 'virtual' keyword is omitted for virtual member functions. 725 PrettyFunctionNoVirtual 726 }; 727 728private: 729 SourceLocation Loc; 730 IdentType Type; 731public: 732 PredefinedExpr(SourceLocation l, QualType type, IdentType IT) 733 : Expr(PredefinedExprClass, type, type->isDependentType(), 734 type->isDependentType()), Loc(l), Type(IT) {} 735 736 /// \brief Construct an empty predefined expression. 737 explicit PredefinedExpr(EmptyShell Empty) 738 : Expr(PredefinedExprClass, Empty) { } 739 740 IdentType getIdentType() const { return Type; } 741 void setIdentType(IdentType IT) { Type = IT; } 742 743 SourceLocation getLocation() const { return Loc; } 744 void setLocation(SourceLocation L) { Loc = L; } 745 746 static std::string ComputeName(IdentType IT, const Decl *CurrentDecl); 747 748 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 749 750 static bool classof(const Stmt *T) { 751 return T->getStmtClass() == PredefinedExprClass; 752 } 753 static bool classof(const PredefinedExpr *) { return true; } 754 755 // Iterators 756 virtual child_iterator child_begin(); 757 virtual child_iterator child_end(); 758}; 759 760/// \brief Used by IntegerLiteral/FloatingLiteral to store the numeric without 761/// leaking memory. 762/// 763/// For large floats/integers, APFloat/APInt will allocate memory from the heap 764/// to represent these numbers. Unfortunately, when we use a BumpPtrAllocator 765/// to allocate IntegerLiteral/FloatingLiteral nodes the memory associated with 766/// the APFloat/APInt values will never get freed. APNumericStorage uses 767/// ASTContext's allocator for memory allocation. 768class APNumericStorage { 769 unsigned BitWidth; 770 union { 771 uint64_t VAL; ///< Used to store the <= 64 bits integer value. 772 uint64_t *pVal; ///< Used to store the >64 bits integer value. 773 }; 774 775 bool hasAllocation() const { return llvm::APInt::getNumWords(BitWidth) > 1; } 776 777 APNumericStorage(const APNumericStorage&); // do not implement 778 APNumericStorage& operator=(const APNumericStorage&); // do not implement 779 780protected: 781 APNumericStorage() : BitWidth(0), VAL(0) { } 782 783 llvm::APInt getIntValue() const { 784 unsigned NumWords = llvm::APInt::getNumWords(BitWidth); 785 if (NumWords > 1) 786 return llvm::APInt(BitWidth, NumWords, pVal); 787 else 788 return llvm::APInt(BitWidth, VAL); 789 } 790 void setIntValue(ASTContext &C, const llvm::APInt &Val); 791}; 792 793class APIntStorage : public APNumericStorage { 794public: 795 llvm::APInt getValue() const { return getIntValue(); } 796 void setValue(ASTContext &C, const llvm::APInt &Val) { setIntValue(C, Val); } 797}; 798 799class APFloatStorage : public APNumericStorage { 800public: 801 llvm::APFloat getValue() const { return llvm::APFloat(getIntValue()); } 802 void setValue(ASTContext &C, const llvm::APFloat &Val) { 803 setIntValue(C, Val.bitcastToAPInt()); 804 } 805}; 806 807class IntegerLiteral : public Expr { 808 APIntStorage Num; 809 SourceLocation Loc; 810 811 /// \brief Construct an empty integer literal. 812 explicit IntegerLiteral(EmptyShell Empty) 813 : Expr(IntegerLiteralClass, Empty) { } 814 815public: 816 // type should be IntTy, LongTy, LongLongTy, UnsignedIntTy, UnsignedLongTy, 817 // or UnsignedLongLongTy 818 IntegerLiteral(ASTContext &C, const llvm::APInt &V, 819 QualType type, SourceLocation l) 820 : Expr(IntegerLiteralClass, type, false, false), Loc(l) { 821 assert(type->isIntegerType() && "Illegal type in IntegerLiteral"); 822 setValue(C, V); 823 } 824 825 // type should be IntTy, LongTy, LongLongTy, UnsignedIntTy, UnsignedLongTy, 826 // or UnsignedLongLongTy 827 static IntegerLiteral *Create(ASTContext &C, const llvm::APInt &V, 828 QualType type, SourceLocation l); 829 static IntegerLiteral *Create(ASTContext &C, EmptyShell Empty); 830 831 llvm::APInt getValue() const { return Num.getValue(); } 832 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 833 834 /// \brief Retrieve the location of the literal. 835 SourceLocation getLocation() const { return Loc; } 836 837 void setValue(ASTContext &C, const llvm::APInt &Val) { Num.setValue(C, Val); } 838 void setLocation(SourceLocation Location) { Loc = Location; } 839 840 static bool classof(const Stmt *T) { 841 return T->getStmtClass() == IntegerLiteralClass; 842 } 843 static bool classof(const IntegerLiteral *) { return true; } 844 845 // Iterators 846 virtual child_iterator child_begin(); 847 virtual child_iterator child_end(); 848}; 849 850class CharacterLiteral : public Expr { 851 unsigned Value; 852 SourceLocation Loc; 853 bool IsWide; 854public: 855 // type should be IntTy 856 CharacterLiteral(unsigned value, bool iswide, QualType type, SourceLocation l) 857 : Expr(CharacterLiteralClass, type, false, false), Value(value), Loc(l), 858 IsWide(iswide) { 859 } 860 861 /// \brief Construct an empty character literal. 862 CharacterLiteral(EmptyShell Empty) : Expr(CharacterLiteralClass, Empty) { } 863 864 SourceLocation getLocation() const { return Loc; } 865 bool isWide() const { return IsWide; } 866 867 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 868 869 unsigned getValue() const { return Value; } 870 871 void setLocation(SourceLocation Location) { Loc = Location; } 872 void setWide(bool W) { IsWide = W; } 873 void setValue(unsigned Val) { Value = Val; } 874 875 static bool classof(const Stmt *T) { 876 return T->getStmtClass() == CharacterLiteralClass; 877 } 878 static bool classof(const CharacterLiteral *) { return true; } 879 880 // Iterators 881 virtual child_iterator child_begin(); 882 virtual child_iterator child_end(); 883}; 884 885class FloatingLiteral : public Expr { 886 APFloatStorage Num; 887 bool IsExact : 1; 888 SourceLocation Loc; 889 890 FloatingLiteral(ASTContext &C, const llvm::APFloat &V, bool isexact, 891 QualType Type, SourceLocation L) 892 : Expr(FloatingLiteralClass, Type, false, false), 893 IsExact(isexact), Loc(L) { 894 setValue(C, V); 895 } 896 897 /// \brief Construct an empty floating-point literal. 898 explicit FloatingLiteral(EmptyShell Empty) 899 : Expr(FloatingLiteralClass, Empty), IsExact(false) { } 900 901public: 902 static FloatingLiteral *Create(ASTContext &C, const llvm::APFloat &V, 903 bool isexact, QualType Type, SourceLocation L); 904 static FloatingLiteral *Create(ASTContext &C, EmptyShell Empty); 905 906 llvm::APFloat getValue() const { return Num.getValue(); } 907 void setValue(ASTContext &C, const llvm::APFloat &Val) { 908 Num.setValue(C, Val); 909 } 910 911 bool isExact() const { return IsExact; } 912 void setExact(bool E) { IsExact = E; } 913 914 /// getValueAsApproximateDouble - This returns the value as an inaccurate 915 /// double. Note that this may cause loss of precision, but is useful for 916 /// debugging dumps, etc. 917 double getValueAsApproximateDouble() const; 918 919 SourceLocation getLocation() const { return Loc; } 920 void setLocation(SourceLocation L) { Loc = L; } 921 922 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 923 924 static bool classof(const Stmt *T) { 925 return T->getStmtClass() == FloatingLiteralClass; 926 } 927 static bool classof(const FloatingLiteral *) { return true; } 928 929 // Iterators 930 virtual child_iterator child_begin(); 931 virtual child_iterator child_end(); 932}; 933 934/// ImaginaryLiteral - We support imaginary integer and floating point literals, 935/// like "1.0i". We represent these as a wrapper around FloatingLiteral and 936/// IntegerLiteral classes. Instances of this class always have a Complex type 937/// whose element type matches the subexpression. 938/// 939class ImaginaryLiteral : public Expr { 940 Stmt *Val; 941public: 942 ImaginaryLiteral(Expr *val, QualType Ty) 943 : Expr(ImaginaryLiteralClass, Ty, false, false), Val(val) {} 944 945 /// \brief Build an empty imaginary literal. 946 explicit ImaginaryLiteral(EmptyShell Empty) 947 : Expr(ImaginaryLiteralClass, Empty) { } 948 949 const Expr *getSubExpr() const { return cast<Expr>(Val); } 950 Expr *getSubExpr() { return cast<Expr>(Val); } 951 void setSubExpr(Expr *E) { Val = E; } 952 953 virtual SourceRange getSourceRange() const { return Val->getSourceRange(); } 954 static bool classof(const Stmt *T) { 955 return T->getStmtClass() == ImaginaryLiteralClass; 956 } 957 static bool classof(const ImaginaryLiteral *) { return true; } 958 959 // Iterators 960 virtual child_iterator child_begin(); 961 virtual child_iterator child_end(); 962}; 963 964/// StringLiteral - This represents a string literal expression, e.g. "foo" 965/// or L"bar" (wide strings). The actual string is returned by getStrData() 966/// is NOT null-terminated, and the length of the string is determined by 967/// calling getByteLength(). The C type for a string is always a 968/// ConstantArrayType. In C++, the char type is const qualified, in C it is 969/// not. 970/// 971/// Note that strings in C can be formed by concatenation of multiple string 972/// literal pptokens in translation phase #6. This keeps track of the locations 973/// of each of these pieces. 974/// 975/// Strings in C can also be truncated and extended by assigning into arrays, 976/// e.g. with constructs like: 977/// char X[2] = "foobar"; 978/// In this case, getByteLength() will return 6, but the string literal will 979/// have type "char[2]". 980class StringLiteral : public Expr { 981 const char *StrData; 982 unsigned ByteLength; 983 bool IsWide; 984 unsigned NumConcatenated; 985 SourceLocation TokLocs[1]; 986 987 StringLiteral(QualType Ty) : Expr(StringLiteralClass, Ty, false, false) {} 988 989public: 990 /// This is the "fully general" constructor that allows representation of 991 /// strings formed from multiple concatenated tokens. 992 static StringLiteral *Create(ASTContext &C, const char *StrData, 993 unsigned ByteLength, bool Wide, QualType Ty, 994 const SourceLocation *Loc, unsigned NumStrs); 995 996 /// Simple constructor for string literals made from one token. 997 static StringLiteral *Create(ASTContext &C, const char *StrData, 998 unsigned ByteLength, 999 bool Wide, QualType Ty, SourceLocation Loc) { 1000 return Create(C, StrData, ByteLength, Wide, Ty, &Loc, 1); 1001 } 1002 1003 /// \brief Construct an empty string literal. 1004 static StringLiteral *CreateEmpty(ASTContext &C, unsigned NumStrs); 1005 1006 llvm::StringRef getString() const { 1007 return llvm::StringRef(StrData, ByteLength); 1008 } 1009 1010 unsigned getByteLength() const { return ByteLength; } 1011 1012 /// \brief Sets the string data to the given string data. 1013 void setString(ASTContext &C, llvm::StringRef Str); 1014 1015 bool isWide() const { return IsWide; } 1016 void setWide(bool W) { IsWide = W; } 1017 1018 bool containsNonAsciiOrNull() const { 1019 llvm::StringRef Str = getString(); 1020 for (unsigned i = 0, e = Str.size(); i != e; ++i) 1021 if (!isascii(Str[i]) || !Str[i]) 1022 return true; 1023 return false; 1024 } 1025 /// getNumConcatenated - Get the number of string literal tokens that were 1026 /// concatenated in translation phase #6 to form this string literal. 1027 unsigned getNumConcatenated() const { return NumConcatenated; } 1028 1029 SourceLocation getStrTokenLoc(unsigned TokNum) const { 1030 assert(TokNum < NumConcatenated && "Invalid tok number"); 1031 return TokLocs[TokNum]; 1032 } 1033 void setStrTokenLoc(unsigned TokNum, SourceLocation L) { 1034 assert(TokNum < NumConcatenated && "Invalid tok number"); 1035 TokLocs[TokNum] = L; 1036 } 1037 1038 typedef const SourceLocation *tokloc_iterator; 1039 tokloc_iterator tokloc_begin() const { return TokLocs; } 1040 tokloc_iterator tokloc_end() const { return TokLocs+NumConcatenated; } 1041 1042 virtual SourceRange getSourceRange() const { 1043 return SourceRange(TokLocs[0], TokLocs[NumConcatenated-1]); 1044 } 1045 static bool classof(const Stmt *T) { 1046 return T->getStmtClass() == StringLiteralClass; 1047 } 1048 static bool classof(const StringLiteral *) { return true; } 1049 1050 // Iterators 1051 virtual child_iterator child_begin(); 1052 virtual child_iterator child_end(); 1053}; 1054 1055/// ParenExpr - This represents a parethesized expression, e.g. "(1)". This 1056/// AST node is only formed if full location information is requested. 1057class ParenExpr : public Expr { 1058 SourceLocation L, R; 1059 Stmt *Val; 1060public: 1061 ParenExpr(SourceLocation l, SourceLocation r, Expr *val) 1062 : Expr(ParenExprClass, val->getType(), 1063 val->isTypeDependent(), val->isValueDependent()), 1064 L(l), R(r), Val(val) {} 1065 1066 /// \brief Construct an empty parenthesized expression. 1067 explicit ParenExpr(EmptyShell Empty) 1068 : Expr(ParenExprClass, Empty) { } 1069 1070 const Expr *getSubExpr() const { return cast<Expr>(Val); } 1071 Expr *getSubExpr() { return cast<Expr>(Val); } 1072 void setSubExpr(Expr *E) { Val = E; } 1073 1074 virtual SourceRange getSourceRange() const { return SourceRange(L, R); } 1075 1076 /// \brief Get the location of the left parentheses '('. 1077 SourceLocation getLParen() const { return L; } 1078 void setLParen(SourceLocation Loc) { L = Loc; } 1079 1080 /// \brief Get the location of the right parentheses ')'. 1081 SourceLocation getRParen() const { return R; } 1082 void setRParen(SourceLocation Loc) { R = Loc; } 1083 1084 static bool classof(const Stmt *T) { 1085 return T->getStmtClass() == ParenExprClass; 1086 } 1087 static bool classof(const ParenExpr *) { return true; } 1088 1089 // Iterators 1090 virtual child_iterator child_begin(); 1091 virtual child_iterator child_end(); 1092}; 1093 1094 1095/// UnaryOperator - This represents the unary-expression's (except sizeof and 1096/// alignof), the postinc/postdec operators from postfix-expression, and various 1097/// extensions. 1098/// 1099/// Notes on various nodes: 1100/// 1101/// Real/Imag - These return the real/imag part of a complex operand. If 1102/// applied to a non-complex value, the former returns its operand and the 1103/// later returns zero in the type of the operand. 1104/// 1105class UnaryOperator : public Expr { 1106public: 1107 typedef UnaryOperatorKind Opcode; 1108 1109private: 1110 unsigned Opc : 5; 1111 SourceLocation Loc; 1112 Stmt *Val; 1113public: 1114 1115 UnaryOperator(Expr *input, Opcode opc, QualType type, SourceLocation l) 1116 : Expr(UnaryOperatorClass, type, 1117 input->isTypeDependent() || type->isDependentType(), 1118 input->isValueDependent()), 1119 Opc(opc), Loc(l), Val(input) {} 1120 1121 /// \brief Build an empty unary operator. 1122 explicit UnaryOperator(EmptyShell Empty) 1123 : Expr(UnaryOperatorClass, Empty), Opc(UO_AddrOf) { } 1124 1125 Opcode getOpcode() const { return static_cast<Opcode>(Opc); } 1126 void setOpcode(Opcode O) { Opc = O; } 1127 1128 Expr *getSubExpr() const { return cast<Expr>(Val); } 1129 void setSubExpr(Expr *E) { Val = E; } 1130 1131 /// getOperatorLoc - Return the location of the operator. 1132 SourceLocation getOperatorLoc() const { return Loc; } 1133 void setOperatorLoc(SourceLocation L) { Loc = L; } 1134 1135 /// isPostfix - Return true if this is a postfix operation, like x++. 1136 static bool isPostfix(Opcode Op) { 1137 return Op == UO_PostInc || Op == UO_PostDec; 1138 } 1139 1140 /// isPostfix - Return true if this is a prefix operation, like --x. 1141 static bool isPrefix(Opcode Op) { 1142 return Op == UO_PreInc || Op == UO_PreDec; 1143 } 1144 1145 bool isPrefix() const { return isPrefix(getOpcode()); } 1146 bool isPostfix() const { return isPostfix(getOpcode()); } 1147 bool isIncrementOp() const { 1148 return Opc == UO_PreInc || Opc == UO_PostInc; 1149 } 1150 bool isIncrementDecrementOp() const { 1151 return Opc <= UO_PreDec; 1152 } 1153 static bool isArithmeticOp(Opcode Op) { 1154 return Op >= UO_Plus && Op <= UO_LNot; 1155 } 1156 bool isArithmeticOp() const { return isArithmeticOp(getOpcode()); } 1157 1158 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 1159 /// corresponds to, e.g. "sizeof" or "[pre]++" 1160 static const char *getOpcodeStr(Opcode Op); 1161 1162 /// \brief Retrieve the unary opcode that corresponds to the given 1163 /// overloaded operator. 1164 static Opcode getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix); 1165 1166 /// \brief Retrieve the overloaded operator kind that corresponds to 1167 /// the given unary opcode. 1168 static OverloadedOperatorKind getOverloadedOperator(Opcode Opc); 1169 1170 virtual SourceRange getSourceRange() const { 1171 if (isPostfix()) 1172 return SourceRange(Val->getLocStart(), Loc); 1173 else 1174 return SourceRange(Loc, Val->getLocEnd()); 1175 } 1176 virtual SourceLocation getExprLoc() const { return Loc; } 1177 1178 static bool classof(const Stmt *T) { 1179 return T->getStmtClass() == UnaryOperatorClass; 1180 } 1181 static bool classof(const UnaryOperator *) { return true; } 1182 1183 // Iterators 1184 virtual child_iterator child_begin(); 1185 virtual child_iterator child_end(); 1186}; 1187 1188/// OffsetOfExpr - [C99 7.17] - This represents an expression of the form 1189/// offsetof(record-type, member-designator). For example, given: 1190/// @code 1191/// struct S { 1192/// float f; 1193/// double d; 1194/// }; 1195/// struct T { 1196/// int i; 1197/// struct S s[10]; 1198/// }; 1199/// @endcode 1200/// we can represent and evaluate the expression @c offsetof(struct T, s[2].d). 1201 1202class OffsetOfExpr : public Expr { 1203public: 1204 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 1205 class OffsetOfNode { 1206 public: 1207 /// \brief The kind of offsetof node we have. 1208 enum Kind { 1209 /// \brief An index into an array. 1210 Array = 0x00, 1211 /// \brief A field. 1212 Field = 0x01, 1213 /// \brief A field in a dependent type, known only by its name. 1214 Identifier = 0x02, 1215 /// \brief An implicit indirection through a C++ base class, when the 1216 /// field found is in a base class. 1217 Base = 0x03 1218 }; 1219 1220 private: 1221 enum { MaskBits = 2, Mask = 0x03 }; 1222 1223 /// \brief The source range that covers this part of the designator. 1224 SourceRange Range; 1225 1226 /// \brief The data describing the designator, which comes in three 1227 /// different forms, depending on the lower two bits. 1228 /// - An unsigned index into the array of Expr*'s stored after this node 1229 /// in memory, for [constant-expression] designators. 1230 /// - A FieldDecl*, for references to a known field. 1231 /// - An IdentifierInfo*, for references to a field with a given name 1232 /// when the class type is dependent. 1233 /// - A CXXBaseSpecifier*, for references that look at a field in a 1234 /// base class. 1235 uintptr_t Data; 1236 1237 public: 1238 /// \brief Create an offsetof node that refers to an array element. 1239 OffsetOfNode(SourceLocation LBracketLoc, unsigned Index, 1240 SourceLocation RBracketLoc) 1241 : Range(LBracketLoc, RBracketLoc), Data((Index << 2) | Array) { } 1242 1243 /// \brief Create an offsetof node that refers to a field. 1244 OffsetOfNode(SourceLocation DotLoc, FieldDecl *Field, 1245 SourceLocation NameLoc) 1246 : Range(DotLoc.isValid()? DotLoc : NameLoc, NameLoc), 1247 Data(reinterpret_cast<uintptr_t>(Field) | OffsetOfNode::Field) { } 1248 1249 /// \brief Create an offsetof node that refers to an identifier. 1250 OffsetOfNode(SourceLocation DotLoc, IdentifierInfo *Name, 1251 SourceLocation NameLoc) 1252 : Range(DotLoc.isValid()? DotLoc : NameLoc, NameLoc), 1253 Data(reinterpret_cast<uintptr_t>(Name) | Identifier) { } 1254 1255 /// \brief Create an offsetof node that refers into a C++ base class. 1256 explicit OffsetOfNode(const CXXBaseSpecifier *Base) 1257 : Range(), Data(reinterpret_cast<uintptr_t>(Base) | OffsetOfNode::Base) {} 1258 1259 /// \brief Determine what kind of offsetof node this is. 1260 Kind getKind() const { 1261 return static_cast<Kind>(Data & Mask); 1262 } 1263 1264 /// \brief For an array element node, returns the index into the array 1265 /// of expressions. 1266 unsigned getArrayExprIndex() const { 1267 assert(getKind() == Array); 1268 return Data >> 2; 1269 } 1270 1271 /// \brief For a field offsetof node, returns the field. 1272 FieldDecl *getField() const { 1273 assert(getKind() == Field); 1274 return reinterpret_cast<FieldDecl *>(Data & ~(uintptr_t)Mask); 1275 } 1276 1277 /// \brief For a field or identifier offsetof node, returns the name of 1278 /// the field. 1279 IdentifierInfo *getFieldName() const; 1280 1281 /// \brief For a base class node, returns the base specifier. 1282 CXXBaseSpecifier *getBase() const { 1283 assert(getKind() == Base); 1284 return reinterpret_cast<CXXBaseSpecifier *>(Data & ~(uintptr_t)Mask); 1285 } 1286 1287 /// \brief Retrieve the source range that covers this offsetof node. 1288 /// 1289 /// For an array element node, the source range contains the locations of 1290 /// the square brackets. For a field or identifier node, the source range 1291 /// contains the location of the period (if there is one) and the 1292 /// identifier. 1293 SourceRange getRange() const { return Range; } 1294 }; 1295 1296private: 1297 1298 SourceLocation OperatorLoc, RParenLoc; 1299 // Base type; 1300 TypeSourceInfo *TSInfo; 1301 // Number of sub-components (i.e. instances of OffsetOfNode). 1302 unsigned NumComps; 1303 // Number of sub-expressions (i.e. array subscript expressions). 1304 unsigned NumExprs; 1305 1306 OffsetOfExpr(ASTContext &C, QualType type, 1307 SourceLocation OperatorLoc, TypeSourceInfo *tsi, 1308 OffsetOfNode* compsPtr, unsigned numComps, 1309 Expr** exprsPtr, unsigned numExprs, 1310 SourceLocation RParenLoc); 1311 1312 explicit OffsetOfExpr(unsigned numComps, unsigned numExprs) 1313 : Expr(OffsetOfExprClass, EmptyShell()), 1314 TSInfo(0), NumComps(numComps), NumExprs(numExprs) {} 1315 1316public: 1317 1318 static OffsetOfExpr *Create(ASTContext &C, QualType type, 1319 SourceLocation OperatorLoc, TypeSourceInfo *tsi, 1320 OffsetOfNode* compsPtr, unsigned numComps, 1321 Expr** exprsPtr, unsigned numExprs, 1322 SourceLocation RParenLoc); 1323 1324 static OffsetOfExpr *CreateEmpty(ASTContext &C, 1325 unsigned NumComps, unsigned NumExprs); 1326 1327 /// getOperatorLoc - Return the location of the operator. 1328 SourceLocation getOperatorLoc() const { return OperatorLoc; } 1329 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 1330 1331 /// \brief Return the location of the right parentheses. 1332 SourceLocation getRParenLoc() const { return RParenLoc; } 1333 void setRParenLoc(SourceLocation R) { RParenLoc = R; } 1334 1335 TypeSourceInfo *getTypeSourceInfo() const { 1336 return TSInfo; 1337 } 1338 void setTypeSourceInfo(TypeSourceInfo *tsi) { 1339 TSInfo = tsi; 1340 } 1341 1342 const OffsetOfNode &getComponent(unsigned Idx) { 1343 assert(Idx < NumComps && "Subscript out of range"); 1344 return reinterpret_cast<OffsetOfNode *> (this + 1)[Idx]; 1345 } 1346 1347 void setComponent(unsigned Idx, OffsetOfNode ON) { 1348 assert(Idx < NumComps && "Subscript out of range"); 1349 reinterpret_cast<OffsetOfNode *> (this + 1)[Idx] = ON; 1350 } 1351 1352 unsigned getNumComponents() const { 1353 return NumComps; 1354 } 1355 1356 Expr* getIndexExpr(unsigned Idx) { 1357 assert(Idx < NumExprs && "Subscript out of range"); 1358 return reinterpret_cast<Expr **>( 1359 reinterpret_cast<OffsetOfNode *>(this+1) + NumComps)[Idx]; 1360 } 1361 1362 void setIndexExpr(unsigned Idx, Expr* E) { 1363 assert(Idx < NumComps && "Subscript out of range"); 1364 reinterpret_cast<Expr **>( 1365 reinterpret_cast<OffsetOfNode *>(this+1) + NumComps)[Idx] = E; 1366 } 1367 1368 unsigned getNumExpressions() const { 1369 return NumExprs; 1370 } 1371 1372 virtual SourceRange getSourceRange() const { 1373 return SourceRange(OperatorLoc, RParenLoc); 1374 } 1375 1376 static bool classof(const Stmt *T) { 1377 return T->getStmtClass() == OffsetOfExprClass; 1378 } 1379 1380 static bool classof(const OffsetOfExpr *) { return true; } 1381 1382 // Iterators 1383 virtual child_iterator child_begin(); 1384 virtual child_iterator child_end(); 1385}; 1386 1387/// SizeOfAlignOfExpr - [C99 6.5.3.4] - This is for sizeof/alignof, both of 1388/// types and expressions. 1389class SizeOfAlignOfExpr : public Expr { 1390 bool isSizeof : 1; // true if sizeof, false if alignof. 1391 bool isType : 1; // true if operand is a type, false if an expression 1392 union { 1393 TypeSourceInfo *Ty; 1394 Stmt *Ex; 1395 } Argument; 1396 SourceLocation OpLoc, RParenLoc; 1397 1398public: 1399 SizeOfAlignOfExpr(bool issizeof, TypeSourceInfo *TInfo, 1400 QualType resultType, SourceLocation op, 1401 SourceLocation rp) : 1402 Expr(SizeOfAlignOfExprClass, resultType, 1403 false, // Never type-dependent (C++ [temp.dep.expr]p3). 1404 // Value-dependent if the argument is type-dependent. 1405 TInfo->getType()->isDependentType()), 1406 isSizeof(issizeof), isType(true), OpLoc(op), RParenLoc(rp) { 1407 Argument.Ty = TInfo; 1408 } 1409 1410 SizeOfAlignOfExpr(bool issizeof, Expr *E, 1411 QualType resultType, SourceLocation op, 1412 SourceLocation rp) : 1413 Expr(SizeOfAlignOfExprClass, resultType, 1414 false, // Never type-dependent (C++ [temp.dep.expr]p3). 1415 // Value-dependent if the argument is type-dependent. 1416 E->isTypeDependent()), 1417 isSizeof(issizeof), isType(false), OpLoc(op), RParenLoc(rp) { 1418 Argument.Ex = E; 1419 } 1420 1421 /// \brief Construct an empty sizeof/alignof expression. 1422 explicit SizeOfAlignOfExpr(EmptyShell Empty) 1423 : Expr(SizeOfAlignOfExprClass, Empty) { } 1424 1425 bool isSizeOf() const { return isSizeof; } 1426 void setSizeof(bool S) { isSizeof = S; } 1427 1428 bool isArgumentType() const { return isType; } 1429 QualType getArgumentType() const { 1430 return getArgumentTypeInfo()->getType(); 1431 } 1432 TypeSourceInfo *getArgumentTypeInfo() const { 1433 assert(isArgumentType() && "calling getArgumentType() when arg is expr"); 1434 return Argument.Ty; 1435 } 1436 Expr *getArgumentExpr() { 1437 assert(!isArgumentType() && "calling getArgumentExpr() when arg is type"); 1438 return static_cast<Expr*>(Argument.Ex); 1439 } 1440 const Expr *getArgumentExpr() const { 1441 return const_cast<SizeOfAlignOfExpr*>(this)->getArgumentExpr(); 1442 } 1443 1444 void setArgument(Expr *E) { Argument.Ex = E; isType = false; } 1445 void setArgument(TypeSourceInfo *TInfo) { 1446 Argument.Ty = TInfo; 1447 isType = true; 1448 } 1449 1450 /// Gets the argument type, or the type of the argument expression, whichever 1451 /// is appropriate. 1452 QualType getTypeOfArgument() const { 1453 return isArgumentType() ? getArgumentType() : getArgumentExpr()->getType(); 1454 } 1455 1456 SourceLocation getOperatorLoc() const { return OpLoc; } 1457 void setOperatorLoc(SourceLocation L) { OpLoc = L; } 1458 1459 SourceLocation getRParenLoc() const { return RParenLoc; } 1460 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1461 1462 virtual SourceRange getSourceRange() const { 1463 return SourceRange(OpLoc, RParenLoc); 1464 } 1465 1466 static bool classof(const Stmt *T) { 1467 return T->getStmtClass() == SizeOfAlignOfExprClass; 1468 } 1469 static bool classof(const SizeOfAlignOfExpr *) { return true; } 1470 1471 // Iterators 1472 virtual child_iterator child_begin(); 1473 virtual child_iterator child_end(); 1474}; 1475 1476//===----------------------------------------------------------------------===// 1477// Postfix Operators. 1478//===----------------------------------------------------------------------===// 1479 1480/// ArraySubscriptExpr - [C99 6.5.2.1] Array Subscripting. 1481class ArraySubscriptExpr : public Expr { 1482 enum { LHS, RHS, END_EXPR=2 }; 1483 Stmt* SubExprs[END_EXPR]; 1484 SourceLocation RBracketLoc; 1485public: 1486 ArraySubscriptExpr(Expr *lhs, Expr *rhs, QualType t, 1487 SourceLocation rbracketloc) 1488 : Expr(ArraySubscriptExprClass, t, 1489 lhs->isTypeDependent() || rhs->isTypeDependent(), 1490 lhs->isValueDependent() || rhs->isValueDependent()), 1491 RBracketLoc(rbracketloc) { 1492 SubExprs[LHS] = lhs; 1493 SubExprs[RHS] = rhs; 1494 } 1495 1496 /// \brief Create an empty array subscript expression. 1497 explicit ArraySubscriptExpr(EmptyShell Shell) 1498 : Expr(ArraySubscriptExprClass, Shell) { } 1499 1500 /// An array access can be written A[4] or 4[A] (both are equivalent). 1501 /// - getBase() and getIdx() always present the normalized view: A[4]. 1502 /// In this case getBase() returns "A" and getIdx() returns "4". 1503 /// - getLHS() and getRHS() present the syntactic view. e.g. for 1504 /// 4[A] getLHS() returns "4". 1505 /// Note: Because vector element access is also written A[4] we must 1506 /// predicate the format conversion in getBase and getIdx only on the 1507 /// the type of the RHS, as it is possible for the LHS to be a vector of 1508 /// integer type 1509 Expr *getLHS() { return cast<Expr>(SubExprs[LHS]); } 1510 const Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } 1511 void setLHS(Expr *E) { SubExprs[LHS] = E; } 1512 1513 Expr *getRHS() { return cast<Expr>(SubExprs[RHS]); } 1514 const Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 1515 void setRHS(Expr *E) { SubExprs[RHS] = E; } 1516 1517 Expr *getBase() { 1518 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getLHS():getRHS()); 1519 } 1520 1521 const Expr *getBase() const { 1522 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getLHS():getRHS()); 1523 } 1524 1525 Expr *getIdx() { 1526 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getRHS():getLHS()); 1527 } 1528 1529 const Expr *getIdx() const { 1530 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getRHS():getLHS()); 1531 } 1532 1533 virtual SourceRange getSourceRange() const { 1534 return SourceRange(getLHS()->getLocStart(), RBracketLoc); 1535 } 1536 1537 SourceLocation getRBracketLoc() const { return RBracketLoc; } 1538 void setRBracketLoc(SourceLocation L) { RBracketLoc = L; } 1539 1540 virtual SourceLocation getExprLoc() const { return getBase()->getExprLoc(); } 1541 1542 static bool classof(const Stmt *T) { 1543 return T->getStmtClass() == ArraySubscriptExprClass; 1544 } 1545 static bool classof(const ArraySubscriptExpr *) { return true; } 1546 1547 // Iterators 1548 virtual child_iterator child_begin(); 1549 virtual child_iterator child_end(); 1550}; 1551 1552 1553/// CallExpr - Represents a function call (C99 6.5.2.2, C++ [expr.call]). 1554/// CallExpr itself represents a normal function call, e.g., "f(x, 2)", 1555/// while its subclasses may represent alternative syntax that (semantically) 1556/// results in a function call. For example, CXXOperatorCallExpr is 1557/// a subclass for overloaded operator calls that use operator syntax, e.g., 1558/// "str1 + str2" to resolve to a function call. 1559class CallExpr : public Expr { 1560 enum { FN=0, ARGS_START=1 }; 1561 Stmt **SubExprs; 1562 unsigned NumArgs; 1563 SourceLocation RParenLoc; 1564 1565protected: 1566 // This version of the constructor is for derived classes. 1567 CallExpr(ASTContext& C, StmtClass SC, Expr *fn, Expr **args, unsigned numargs, 1568 QualType t, SourceLocation rparenloc); 1569 1570public: 1571 CallExpr(ASTContext& C, Expr *fn, Expr **args, unsigned numargs, QualType t, 1572 SourceLocation rparenloc); 1573 1574 /// \brief Build an empty call expression. 1575 CallExpr(ASTContext &C, StmtClass SC, EmptyShell Empty); 1576 1577 const Expr *getCallee() const { return cast<Expr>(SubExprs[FN]); } 1578 Expr *getCallee() { return cast<Expr>(SubExprs[FN]); } 1579 void setCallee(Expr *F) { SubExprs[FN] = F; } 1580 1581 Decl *getCalleeDecl(); 1582 const Decl *getCalleeDecl() const { 1583 return const_cast<CallExpr*>(this)->getCalleeDecl(); 1584 } 1585 1586 /// \brief If the callee is a FunctionDecl, return it. Otherwise return 0. 1587 FunctionDecl *getDirectCallee(); 1588 const FunctionDecl *getDirectCallee() const { 1589 return const_cast<CallExpr*>(this)->getDirectCallee(); 1590 } 1591 1592 /// getNumArgs - Return the number of actual arguments to this call. 1593 /// 1594 unsigned getNumArgs() const { return NumArgs; } 1595 1596 /// getArg - Return the specified argument. 1597 Expr *getArg(unsigned Arg) { 1598 assert(Arg < NumArgs && "Arg access out of range!"); 1599 return cast<Expr>(SubExprs[Arg+ARGS_START]); 1600 } 1601 const Expr *getArg(unsigned Arg) const { 1602 assert(Arg < NumArgs && "Arg access out of range!"); 1603 return cast<Expr>(SubExprs[Arg+ARGS_START]); 1604 } 1605 1606 /// setArg - Set the specified argument. 1607 void setArg(unsigned Arg, Expr *ArgExpr) { 1608 assert(Arg < NumArgs && "Arg access out of range!"); 1609 SubExprs[Arg+ARGS_START] = ArgExpr; 1610 } 1611 1612 /// setNumArgs - This changes the number of arguments present in this call. 1613 /// Any orphaned expressions are deleted by this, and any new operands are set 1614 /// to null. 1615 void setNumArgs(ASTContext& C, unsigned NumArgs); 1616 1617 typedef ExprIterator arg_iterator; 1618 typedef ConstExprIterator const_arg_iterator; 1619 1620 arg_iterator arg_begin() { return SubExprs+ARGS_START; } 1621 arg_iterator arg_end() { return SubExprs+ARGS_START+getNumArgs(); } 1622 const_arg_iterator arg_begin() const { return SubExprs+ARGS_START; } 1623 const_arg_iterator arg_end() const { return SubExprs+ARGS_START+getNumArgs();} 1624 1625 /// getNumCommas - Return the number of commas that must have been present in 1626 /// this function call. 1627 unsigned getNumCommas() const { return NumArgs ? NumArgs - 1 : 0; } 1628 1629 /// isBuiltinCall - If this is a call to a builtin, return the builtin ID. If 1630 /// not, return 0. 1631 unsigned isBuiltinCall(ASTContext &Context) const; 1632 1633 /// getCallReturnType - Get the return type of the call expr. This is not 1634 /// always the type of the expr itself, if the return type is a reference 1635 /// type. 1636 QualType getCallReturnType() const; 1637 1638 SourceLocation getRParenLoc() const { return RParenLoc; } 1639 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1640 1641 virtual SourceRange getSourceRange() const { 1642 return SourceRange(getCallee()->getLocStart(), RParenLoc); 1643 } 1644 1645 static bool classof(const Stmt *T) { 1646 return T->getStmtClass() >= firstCallExprConstant && 1647 T->getStmtClass() <= lastCallExprConstant; 1648 } 1649 static bool classof(const CallExpr *) { return true; } 1650 1651 // Iterators 1652 virtual child_iterator child_begin(); 1653 virtual child_iterator child_end(); 1654}; 1655 1656/// MemberExpr - [C99 6.5.2.3] Structure and Union Members. X->F and X.F. 1657/// 1658class MemberExpr : public Expr { 1659 /// Extra data stored in some member expressions. 1660 struct MemberNameQualifier : public NameQualifier { 1661 DeclAccessPair FoundDecl; 1662 }; 1663 1664 /// Base - the expression for the base pointer or structure references. In 1665 /// X.F, this is "X". 1666 Stmt *Base; 1667 1668 /// MemberDecl - This is the decl being referenced by the field/member name. 1669 /// In X.F, this is the decl referenced by F. 1670 ValueDecl *MemberDecl; 1671 1672 /// MemberLoc - This is the location of the member name. 1673 SourceLocation MemberLoc; 1674 1675 /// MemberDNLoc - Provides source/type location info for the 1676 /// declaration name embedded in MemberDecl. 1677 DeclarationNameLoc MemberDNLoc; 1678 1679 /// IsArrow - True if this is "X->F", false if this is "X.F". 1680 bool IsArrow : 1; 1681 1682 /// \brief True if this member expression used a nested-name-specifier to 1683 /// refer to the member, e.g., "x->Base::f", or found its member via a using 1684 /// declaration. When true, a MemberNameQualifier 1685 /// structure is allocated immediately after the MemberExpr. 1686 bool HasQualifierOrFoundDecl : 1; 1687 1688 /// \brief True if this member expression specified a template argument list 1689 /// explicitly, e.g., x->f<int>. When true, an ExplicitTemplateArgumentList 1690 /// structure (and its TemplateArguments) are allocated immediately after 1691 /// the MemberExpr or, if the member expression also has a qualifier, after 1692 /// the MemberNameQualifier structure. 1693 bool HasExplicitTemplateArgumentList : 1; 1694 1695 /// \brief Retrieve the qualifier that preceded the member name, if any. 1696 MemberNameQualifier *getMemberQualifier() { 1697 assert(HasQualifierOrFoundDecl); 1698 return reinterpret_cast<MemberNameQualifier *> (this + 1); 1699 } 1700 1701 /// \brief Retrieve the qualifier that preceded the member name, if any. 1702 const MemberNameQualifier *getMemberQualifier() const { 1703 return const_cast<MemberExpr *>(this)->getMemberQualifier(); 1704 } 1705 1706public: 1707 MemberExpr(Expr *base, bool isarrow, ValueDecl *memberdecl, 1708 const DeclarationNameInfo &NameInfo, QualType ty) 1709 : Expr(MemberExprClass, ty, 1710 base->isTypeDependent(), base->isValueDependent()), 1711 Base(base), MemberDecl(memberdecl), MemberLoc(NameInfo.getLoc()), 1712 MemberDNLoc(NameInfo.getInfo()), IsArrow(isarrow), 1713 HasQualifierOrFoundDecl(false), HasExplicitTemplateArgumentList(false) { 1714 assert(memberdecl->getDeclName() == NameInfo.getName()); 1715 } 1716 1717 // NOTE: this constructor should be used only when it is known that 1718 // the member name can not provide additional syntactic info 1719 // (i.e., source locations for C++ operator names or type source info 1720 // for constructors, destructors and conversion oeprators). 1721 MemberExpr(Expr *base, bool isarrow, ValueDecl *memberdecl, 1722 SourceLocation l, QualType ty) 1723 : Expr(MemberExprClass, ty, 1724 base->isTypeDependent(), base->isValueDependent()), 1725 Base(base), MemberDecl(memberdecl), MemberLoc(l), MemberDNLoc(), 1726 IsArrow(isarrow), 1727 HasQualifierOrFoundDecl(false), HasExplicitTemplateArgumentList(false) {} 1728 1729 static MemberExpr *Create(ASTContext &C, Expr *base, bool isarrow, 1730 NestedNameSpecifier *qual, SourceRange qualrange, 1731 ValueDecl *memberdecl, DeclAccessPair founddecl, 1732 DeclarationNameInfo MemberNameInfo, 1733 const TemplateArgumentListInfo *targs, 1734 QualType ty); 1735 1736 void setBase(Expr *E) { Base = E; } 1737 Expr *getBase() const { return cast<Expr>(Base); } 1738 1739 /// \brief Retrieve the member declaration to which this expression refers. 1740 /// 1741 /// The returned declaration will either be a FieldDecl or (in C++) 1742 /// a CXXMethodDecl. 1743 ValueDecl *getMemberDecl() const { return MemberDecl; } 1744 void setMemberDecl(ValueDecl *D) { MemberDecl = D; } 1745 1746 /// \brief Retrieves the declaration found by lookup. 1747 DeclAccessPair getFoundDecl() const { 1748 if (!HasQualifierOrFoundDecl) 1749 return DeclAccessPair::make(getMemberDecl(), 1750 getMemberDecl()->getAccess()); 1751 return getMemberQualifier()->FoundDecl; 1752 } 1753 1754 /// \brief Determines whether this member expression actually had 1755 /// a C++ nested-name-specifier prior to the name of the member, e.g., 1756 /// x->Base::foo. 1757 bool hasQualifier() const { return getQualifier() != 0; } 1758 1759 /// \brief If the member name was qualified, retrieves the source range of 1760 /// the nested-name-specifier that precedes the member name. Otherwise, 1761 /// returns an empty source range. 1762 SourceRange getQualifierRange() const { 1763 if (!HasQualifierOrFoundDecl) 1764 return SourceRange(); 1765 1766 return getMemberQualifier()->Range; 1767 } 1768 1769 /// \brief If the member name was qualified, retrieves the 1770 /// nested-name-specifier that precedes the member name. Otherwise, returns 1771 /// NULL. 1772 NestedNameSpecifier *getQualifier() const { 1773 if (!HasQualifierOrFoundDecl) 1774 return 0; 1775 1776 return getMemberQualifier()->NNS; 1777 } 1778 1779 /// \brief Determines whether this member expression actually had a C++ 1780 /// template argument list explicitly specified, e.g., x.f<int>. 1781 bool hasExplicitTemplateArgs() const { 1782 return HasExplicitTemplateArgumentList; 1783 } 1784 1785 /// \brief Copies the template arguments (if present) into the given 1786 /// structure. 1787 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1788 if (hasExplicitTemplateArgs()) 1789 getExplicitTemplateArgs().copyInto(List); 1790 } 1791 1792 /// \brief Retrieve the explicit template argument list that 1793 /// follow the member template name. This must only be called on an 1794 /// expression with explicit template arguments. 1795 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 1796 assert(HasExplicitTemplateArgumentList); 1797 if (!HasQualifierOrFoundDecl) 1798 return *reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 1799 1800 return *reinterpret_cast<ExplicitTemplateArgumentList *>( 1801 getMemberQualifier() + 1); 1802 } 1803 1804 /// \brief Retrieve the explicit template argument list that 1805 /// followed the member template name. This must only be called on 1806 /// an expression with explicit template arguments. 1807 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1808 return const_cast<MemberExpr *>(this)->getExplicitTemplateArgs(); 1809 } 1810 1811 /// \brief Retrieves the optional explicit template arguments. 1812 /// This points to the same data as getExplicitTemplateArgs(), but 1813 /// returns null if there are no explicit template arguments. 1814 const ExplicitTemplateArgumentList *getOptionalExplicitTemplateArgs() const { 1815 if (!hasExplicitTemplateArgs()) return 0; 1816 return &getExplicitTemplateArgs(); 1817 } 1818 1819 /// \brief Retrieve the location of the left angle bracket following the 1820 /// member name ('<'), if any. 1821 SourceLocation getLAngleLoc() const { 1822 if (!HasExplicitTemplateArgumentList) 1823 return SourceLocation(); 1824 1825 return getExplicitTemplateArgs().LAngleLoc; 1826 } 1827 1828 /// \brief Retrieve the template arguments provided as part of this 1829 /// template-id. 1830 const TemplateArgumentLoc *getTemplateArgs() const { 1831 if (!HasExplicitTemplateArgumentList) 1832 return 0; 1833 1834 return getExplicitTemplateArgs().getTemplateArgs(); 1835 } 1836 1837 /// \brief Retrieve the number of template arguments provided as part of this 1838 /// template-id. 1839 unsigned getNumTemplateArgs() const { 1840 if (!HasExplicitTemplateArgumentList) 1841 return 0; 1842 1843 return getExplicitTemplateArgs().NumTemplateArgs; 1844 } 1845 1846 /// \brief Retrieve the location of the right angle bracket following the 1847 /// template arguments ('>'). 1848 SourceLocation getRAngleLoc() const { 1849 if (!HasExplicitTemplateArgumentList) 1850 return SourceLocation(); 1851 1852 return getExplicitTemplateArgs().RAngleLoc; 1853 } 1854 1855 /// \brief Retrieve the member declaration name info. 1856 DeclarationNameInfo getMemberNameInfo() const { 1857 return DeclarationNameInfo(MemberDecl->getDeclName(), 1858 MemberLoc, MemberDNLoc); 1859 } 1860 1861 bool isArrow() const { return IsArrow; } 1862 void setArrow(bool A) { IsArrow = A; } 1863 1864 /// getMemberLoc - Return the location of the "member", in X->F, it is the 1865 /// location of 'F'. 1866 SourceLocation getMemberLoc() const { return MemberLoc; } 1867 void setMemberLoc(SourceLocation L) { MemberLoc = L; } 1868 1869 virtual SourceRange getSourceRange() const { 1870 // If we have an implicit base (like a C++ implicit this), 1871 // make sure not to return its location 1872 SourceLocation EndLoc = (HasExplicitTemplateArgumentList) 1873 ? getRAngleLoc() : getMemberNameInfo().getEndLoc(); 1874 1875 SourceLocation BaseLoc = getBase()->getLocStart(); 1876 if (BaseLoc.isInvalid()) 1877 return SourceRange(MemberLoc, EndLoc); 1878 return SourceRange(BaseLoc, EndLoc); 1879 } 1880 1881 virtual SourceLocation getExprLoc() const { return MemberLoc; } 1882 1883 static bool classof(const Stmt *T) { 1884 return T->getStmtClass() == MemberExprClass; 1885 } 1886 static bool classof(const MemberExpr *) { return true; } 1887 1888 // Iterators 1889 virtual child_iterator child_begin(); 1890 virtual child_iterator child_end(); 1891 1892 friend class ASTReader; 1893 friend class ASTStmtWriter; 1894}; 1895 1896/// CompoundLiteralExpr - [C99 6.5.2.5] 1897/// 1898class CompoundLiteralExpr : public Expr { 1899 /// LParenLoc - If non-null, this is the location of the left paren in a 1900 /// compound literal like "(int){4}". This can be null if this is a 1901 /// synthesized compound expression. 1902 SourceLocation LParenLoc; 1903 1904 /// The type as written. This can be an incomplete array type, in 1905 /// which case the actual expression type will be different. 1906 TypeSourceInfo *TInfo; 1907 Stmt *Init; 1908 bool FileScope; 1909public: 1910 // FIXME: Can compound literals be value-dependent? 1911 CompoundLiteralExpr(SourceLocation lparenloc, TypeSourceInfo *tinfo, 1912 QualType T, Expr *init, bool fileScope) 1913 : Expr(CompoundLiteralExprClass, T, 1914 tinfo->getType()->isDependentType(), false), 1915 LParenLoc(lparenloc), TInfo(tinfo), Init(init), FileScope(fileScope) {} 1916 1917 /// \brief Construct an empty compound literal. 1918 explicit CompoundLiteralExpr(EmptyShell Empty) 1919 : Expr(CompoundLiteralExprClass, Empty) { } 1920 1921 const Expr *getInitializer() const { return cast<Expr>(Init); } 1922 Expr *getInitializer() { return cast<Expr>(Init); } 1923 void setInitializer(Expr *E) { Init = E; } 1924 1925 bool isFileScope() const { return FileScope; } 1926 void setFileScope(bool FS) { FileScope = FS; } 1927 1928 SourceLocation getLParenLoc() const { return LParenLoc; } 1929 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 1930 1931 TypeSourceInfo *getTypeSourceInfo() const { return TInfo; } 1932 void setTypeSourceInfo(TypeSourceInfo* tinfo) { TInfo = tinfo; } 1933 1934 virtual SourceRange getSourceRange() const { 1935 // FIXME: Init should never be null. 1936 if (!Init) 1937 return SourceRange(); 1938 if (LParenLoc.isInvalid()) 1939 return Init->getSourceRange(); 1940 return SourceRange(LParenLoc, Init->getLocEnd()); 1941 } 1942 1943 static bool classof(const Stmt *T) { 1944 return T->getStmtClass() == CompoundLiteralExprClass; 1945 } 1946 static bool classof(const CompoundLiteralExpr *) { return true; } 1947 1948 // Iterators 1949 virtual child_iterator child_begin(); 1950 virtual child_iterator child_end(); 1951}; 1952 1953/// CastExpr - Base class for type casts, including both implicit 1954/// casts (ImplicitCastExpr) and explicit casts that have some 1955/// representation in the source code (ExplicitCastExpr's derived 1956/// classes). 1957class CastExpr : public Expr { 1958public: 1959 typedef clang::CastKind CastKind; 1960 1961private: 1962 unsigned Kind : 5; 1963 unsigned BasePathSize : BitsRemaining - 5; 1964 Stmt *Op; 1965 1966 void CheckBasePath() const { 1967#ifndef NDEBUG 1968 switch (getCastKind()) { 1969 case CK_DerivedToBase: 1970 case CK_UncheckedDerivedToBase: 1971 case CK_DerivedToBaseMemberPointer: 1972 case CK_BaseToDerived: 1973 case CK_BaseToDerivedMemberPointer: 1974 assert(!path_empty() && "Cast kind should have a base path!"); 1975 break; 1976 1977 // These should not have an inheritance path. 1978 case CK_Unknown: 1979 case CK_BitCast: 1980 case CK_LValueBitCast: 1981 case CK_NoOp: 1982 case CK_Dynamic: 1983 case CK_ToUnion: 1984 case CK_ArrayToPointerDecay: 1985 case CK_FunctionToPointerDecay: 1986 case CK_NullToMemberPointer: 1987 case CK_UserDefinedConversion: 1988 case CK_ConstructorConversion: 1989 case CK_IntegralToPointer: 1990 case CK_PointerToIntegral: 1991 case CK_ToVoid: 1992 case CK_VectorSplat: 1993 case CK_IntegralCast: 1994 case CK_IntegralToFloating: 1995 case CK_FloatingToIntegral: 1996 case CK_FloatingCast: 1997 case CK_MemberPointerToBoolean: 1998 case CK_AnyPointerToObjCPointerCast: 1999 case CK_AnyPointerToBlockPointerCast: 2000 case CK_ObjCObjectLValueCast: 2001 assert(path_empty() && "Cast kind should not have a base path!"); 2002 break; 2003 } 2004#endif 2005 } 2006 2007 const CXXBaseSpecifier * const *path_buffer() const { 2008 return const_cast<CastExpr*>(this)->path_buffer(); 2009 } 2010 CXXBaseSpecifier **path_buffer(); 2011 2012protected: 2013 CastExpr(StmtClass SC, QualType ty, const CastKind kind, Expr *op, 2014 unsigned BasePathSize) : 2015 Expr(SC, ty, 2016 // Cast expressions are type-dependent if the type is 2017 // dependent (C++ [temp.dep.expr]p3). 2018 ty->isDependentType(), 2019 // Cast expressions are value-dependent if the type is 2020 // dependent or if the subexpression is value-dependent. 2021 ty->isDependentType() || (op && op->isValueDependent())), 2022 Kind(kind), BasePathSize(BasePathSize), Op(op) { 2023 CheckBasePath(); 2024 } 2025 2026 /// \brief Construct an empty cast. 2027 CastExpr(StmtClass SC, EmptyShell Empty, unsigned BasePathSize) 2028 : Expr(SC, Empty), BasePathSize(BasePathSize) { } 2029 2030public: 2031 CastKind getCastKind() const { return static_cast<CastKind>(Kind); } 2032 void setCastKind(CastKind K) { Kind = K; } 2033 const char *getCastKindName() const; 2034 2035 Expr *getSubExpr() { return cast<Expr>(Op); } 2036 const Expr *getSubExpr() const { return cast<Expr>(Op); } 2037 void setSubExpr(Expr *E) { Op = E; } 2038 2039 /// \brief Retrieve the cast subexpression as it was written in the source 2040 /// code, looking through any implicit casts or other intermediate nodes 2041 /// introduced by semantic analysis. 2042 Expr *getSubExprAsWritten(); 2043 const Expr *getSubExprAsWritten() const { 2044 return const_cast<CastExpr *>(this)->getSubExprAsWritten(); 2045 } 2046 2047 typedef CXXBaseSpecifier **path_iterator; 2048 typedef const CXXBaseSpecifier * const *path_const_iterator; 2049 bool path_empty() const { return BasePathSize == 0; } 2050 unsigned path_size() const { return BasePathSize; } 2051 path_iterator path_begin() { return path_buffer(); } 2052 path_iterator path_end() { return path_buffer() + path_size(); } 2053 path_const_iterator path_begin() const { return path_buffer(); } 2054 path_const_iterator path_end() const { return path_buffer() + path_size(); } 2055 2056 void setCastPath(const CXXCastPath &Path); 2057 2058 static bool classof(const Stmt *T) { 2059 return T->getStmtClass() >= firstCastExprConstant && 2060 T->getStmtClass() <= lastCastExprConstant; 2061 } 2062 static bool classof(const CastExpr *) { return true; } 2063 2064 // Iterators 2065 virtual child_iterator child_begin(); 2066 virtual child_iterator child_end(); 2067}; 2068 2069/// ImplicitCastExpr - Allows us to explicitly represent implicit type 2070/// conversions, which have no direct representation in the original 2071/// source code. For example: converting T[]->T*, void f()->void 2072/// (*f)(), float->double, short->int, etc. 2073/// 2074/// In C, implicit casts always produce rvalues. However, in C++, an 2075/// implicit cast whose result is being bound to a reference will be 2076/// an lvalue or xvalue. For example: 2077/// 2078/// @code 2079/// class Base { }; 2080/// class Derived : public Base { }; 2081/// Derived &&ref(); 2082/// void f(Derived d) { 2083/// Base& b = d; // initializer is an ImplicitCastExpr 2084/// // to an lvalue of type Base 2085/// Base&& r = ref(); // initializer is an ImplicitCastExpr 2086/// // to an xvalue of type Base 2087/// } 2088/// @endcode 2089class ImplicitCastExpr : public CastExpr { 2090private: 2091 ImplicitCastExpr(QualType ty, CastKind kind, Expr *op, 2092 unsigned BasePathLength, ExprValueKind VK) 2093 : CastExpr(ImplicitCastExprClass, ty, kind, op, BasePathLength) { 2094 ValueKind = VK; 2095 } 2096 2097 /// \brief Construct an empty implicit cast. 2098 explicit ImplicitCastExpr(EmptyShell Shell, unsigned PathSize) 2099 : CastExpr(ImplicitCastExprClass, Shell, PathSize) { } 2100 2101public: 2102 enum OnStack_t { OnStack }; 2103 ImplicitCastExpr(OnStack_t _, QualType ty, CastKind kind, Expr *op, 2104 ExprValueKind VK) 2105 : CastExpr(ImplicitCastExprClass, ty, kind, op, 0) { 2106 ValueKind = VK; 2107 } 2108 2109 static ImplicitCastExpr *Create(ASTContext &Context, QualType T, 2110 CastKind Kind, Expr *Operand, 2111 const CXXCastPath *BasePath, 2112 ExprValueKind Cat); 2113 2114 static ImplicitCastExpr *CreateEmpty(ASTContext &Context, unsigned PathSize); 2115 2116 virtual SourceRange getSourceRange() const { 2117 return getSubExpr()->getSourceRange(); 2118 } 2119 2120 /// getValueKind - The value kind that this cast produces. 2121 ExprValueKind getValueKind() const { 2122 return static_cast<ExprValueKind>(ValueKind); 2123 } 2124 2125 /// setValueKind - Set the value kind this cast produces. 2126 void setValueKind(ExprValueKind Cat) { ValueKind = Cat; } 2127 2128 static bool classof(const Stmt *T) { 2129 return T->getStmtClass() == ImplicitCastExprClass; 2130 } 2131 static bool classof(const ImplicitCastExpr *) { return true; } 2132}; 2133 2134/// ExplicitCastExpr - An explicit cast written in the source 2135/// code. 2136/// 2137/// This class is effectively an abstract class, because it provides 2138/// the basic representation of an explicitly-written cast without 2139/// specifying which kind of cast (C cast, functional cast, static 2140/// cast, etc.) was written; specific derived classes represent the 2141/// particular style of cast and its location information. 2142/// 2143/// Unlike implicit casts, explicit cast nodes have two different 2144/// types: the type that was written into the source code, and the 2145/// actual type of the expression as determined by semantic 2146/// analysis. These types may differ slightly. For example, in C++ one 2147/// can cast to a reference type, which indicates that the resulting 2148/// expression will be an lvalue or xvalue. The reference type, however, 2149/// will not be used as the type of the expression. 2150class ExplicitCastExpr : public CastExpr { 2151 /// TInfo - Source type info for the (written) type 2152 /// this expression is casting to. 2153 TypeSourceInfo *TInfo; 2154 2155protected: 2156 ExplicitCastExpr(StmtClass SC, QualType exprTy, CastKind kind, 2157 Expr *op, unsigned PathSize, TypeSourceInfo *writtenTy) 2158 : CastExpr(SC, exprTy, kind, op, PathSize), TInfo(writtenTy) {} 2159 2160 /// \brief Construct an empty explicit cast. 2161 ExplicitCastExpr(StmtClass SC, EmptyShell Shell, unsigned PathSize) 2162 : CastExpr(SC, Shell, PathSize) { } 2163 2164public: 2165 /// getTypeInfoAsWritten - Returns the type source info for the type 2166 /// that this expression is casting to. 2167 TypeSourceInfo *getTypeInfoAsWritten() const { return TInfo; } 2168 void setTypeInfoAsWritten(TypeSourceInfo *writtenTy) { TInfo = writtenTy; } 2169 2170 /// getTypeAsWritten - Returns the type that this expression is 2171 /// casting to, as written in the source code. 2172 QualType getTypeAsWritten() const { return TInfo->getType(); } 2173 2174 static bool classof(const Stmt *T) { 2175 return T->getStmtClass() >= firstExplicitCastExprConstant && 2176 T->getStmtClass() <= lastExplicitCastExprConstant; 2177 } 2178 static bool classof(const ExplicitCastExpr *) { return true; } 2179}; 2180 2181/// CStyleCastExpr - An explicit cast in C (C99 6.5.4) or a C-style 2182/// cast in C++ (C++ [expr.cast]), which uses the syntax 2183/// (Type)expr. For example: @c (int)f. 2184class CStyleCastExpr : public ExplicitCastExpr { 2185 SourceLocation LPLoc; // the location of the left paren 2186 SourceLocation RPLoc; // the location of the right paren 2187 2188 CStyleCastExpr(QualType exprTy, CastKind kind, Expr *op, 2189 unsigned PathSize, TypeSourceInfo *writtenTy, 2190 SourceLocation l, SourceLocation r) 2191 : ExplicitCastExpr(CStyleCastExprClass, exprTy, kind, op, PathSize, 2192 writtenTy), LPLoc(l), RPLoc(r) {} 2193 2194 /// \brief Construct an empty C-style explicit cast. 2195 explicit CStyleCastExpr(EmptyShell Shell, unsigned PathSize) 2196 : ExplicitCastExpr(CStyleCastExprClass, Shell, PathSize) { } 2197 2198public: 2199 static CStyleCastExpr *Create(ASTContext &Context, QualType T, CastKind K, 2200 Expr *Op, const CXXCastPath *BasePath, 2201 TypeSourceInfo *WrittenTy, SourceLocation L, 2202 SourceLocation R); 2203 2204 static CStyleCastExpr *CreateEmpty(ASTContext &Context, unsigned PathSize); 2205 2206 SourceLocation getLParenLoc() const { return LPLoc; } 2207 void setLParenLoc(SourceLocation L) { LPLoc = L; } 2208 2209 SourceLocation getRParenLoc() const { return RPLoc; } 2210 void setRParenLoc(SourceLocation L) { RPLoc = L; } 2211 2212 virtual SourceRange getSourceRange() const { 2213 return SourceRange(LPLoc, getSubExpr()->getSourceRange().getEnd()); 2214 } 2215 static bool classof(const Stmt *T) { 2216 return T->getStmtClass() == CStyleCastExprClass; 2217 } 2218 static bool classof(const CStyleCastExpr *) { return true; } 2219}; 2220 2221/// \brief A builtin binary operation expression such as "x + y" or "x <= y". 2222/// 2223/// This expression node kind describes a builtin binary operation, 2224/// such as "x + y" for integer values "x" and "y". The operands will 2225/// already have been converted to appropriate types (e.g., by 2226/// performing promotions or conversions). 2227/// 2228/// In C++, where operators may be overloaded, a different kind of 2229/// expression node (CXXOperatorCallExpr) is used to express the 2230/// invocation of an overloaded operator with operator syntax. Within 2231/// a C++ template, whether BinaryOperator or CXXOperatorCallExpr is 2232/// used to store an expression "x + y" depends on the subexpressions 2233/// for x and y. If neither x or y is type-dependent, and the "+" 2234/// operator resolves to a built-in operation, BinaryOperator will be 2235/// used to express the computation (x and y may still be 2236/// value-dependent). If either x or y is type-dependent, or if the 2237/// "+" resolves to an overloaded operator, CXXOperatorCallExpr will 2238/// be used to express the computation. 2239class BinaryOperator : public Expr { 2240public: 2241 typedef BinaryOperatorKind Opcode; 2242 2243private: 2244 unsigned Opc : 6; 2245 SourceLocation OpLoc; 2246 2247 enum { LHS, RHS, END_EXPR }; 2248 Stmt* SubExprs[END_EXPR]; 2249public: 2250 2251 BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, 2252 SourceLocation opLoc) 2253 : Expr(BinaryOperatorClass, ResTy, 2254 lhs->isTypeDependent() || rhs->isTypeDependent(), 2255 lhs->isValueDependent() || rhs->isValueDependent()), 2256 Opc(opc), OpLoc(opLoc) { 2257 SubExprs[LHS] = lhs; 2258 SubExprs[RHS] = rhs; 2259 assert(!isCompoundAssignmentOp() && 2260 "Use ArithAssignBinaryOperator for compound assignments"); 2261 } 2262 2263 /// \brief Construct an empty binary operator. 2264 explicit BinaryOperator(EmptyShell Empty) 2265 : Expr(BinaryOperatorClass, Empty), Opc(BO_Comma) { } 2266 2267 SourceLocation getOperatorLoc() const { return OpLoc; } 2268 void setOperatorLoc(SourceLocation L) { OpLoc = L; } 2269 2270 Opcode getOpcode() const { return static_cast<Opcode>(Opc); } 2271 void setOpcode(Opcode O) { Opc = O; } 2272 2273 Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } 2274 void setLHS(Expr *E) { SubExprs[LHS] = E; } 2275 Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 2276 void setRHS(Expr *E) { SubExprs[RHS] = E; } 2277 2278 virtual SourceRange getSourceRange() const { 2279 return SourceRange(getLHS()->getLocStart(), getRHS()->getLocEnd()); 2280 } 2281 2282 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 2283 /// corresponds to, e.g. "<<=". 2284 static const char *getOpcodeStr(Opcode Op); 2285 2286 const char *getOpcodeStr() const { return getOpcodeStr(getOpcode()); } 2287 2288 /// \brief Retrieve the binary opcode that corresponds to the given 2289 /// overloaded operator. 2290 static Opcode getOverloadedOpcode(OverloadedOperatorKind OO); 2291 2292 /// \brief Retrieve the overloaded operator kind that corresponds to 2293 /// the given binary opcode. 2294 static OverloadedOperatorKind getOverloadedOperator(Opcode Opc); 2295 2296 /// predicates to categorize the respective opcodes. 2297 bool isPtrMemOp() const { return Opc == BO_PtrMemD || Opc == BO_PtrMemI; } 2298 bool isMultiplicativeOp() const { return Opc >= BO_Mul && Opc <= BO_Rem; } 2299 static bool isAdditiveOp(Opcode Opc) { return Opc == BO_Add || Opc==BO_Sub; } 2300 bool isAdditiveOp() const { return isAdditiveOp(getOpcode()); } 2301 static bool isShiftOp(Opcode Opc) { return Opc == BO_Shl || Opc == BO_Shr; } 2302 bool isShiftOp() const { return isShiftOp(getOpcode()); } 2303 2304 static bool isBitwiseOp(Opcode Opc) { return Opc >= BO_And && Opc <= BO_Or; } 2305 bool isBitwiseOp() const { return isBitwiseOp(getOpcode()); } 2306 2307 static bool isRelationalOp(Opcode Opc) { return Opc >= BO_LT && Opc<=BO_GE; } 2308 bool isRelationalOp() const { return isRelationalOp(getOpcode()); } 2309 2310 static bool isEqualityOp(Opcode Opc) { return Opc == BO_EQ || Opc == BO_NE; } 2311 bool isEqualityOp() const { return isEqualityOp(getOpcode()); } 2312 2313 static bool isComparisonOp(Opcode Opc) { return Opc >= BO_LT && Opc<=BO_NE; } 2314 bool isComparisonOp() const { return isComparisonOp(getOpcode()); } 2315 2316 static bool isLogicalOp(Opcode Opc) { return Opc == BO_LAnd || Opc==BO_LOr; } 2317 bool isLogicalOp() const { return isLogicalOp(getOpcode()); } 2318 2319 bool isAssignmentOp() const { return Opc >= BO_Assign && Opc <= BO_OrAssign; } 2320 bool isCompoundAssignmentOp() const { 2321 return Opc > BO_Assign && Opc <= BO_OrAssign; 2322 } 2323 bool isShiftAssignOp() const { 2324 return Opc == BO_ShlAssign || Opc == BO_ShrAssign; 2325 } 2326 2327 static bool classof(const Stmt *S) { 2328 return S->getStmtClass() >= firstBinaryOperatorConstant && 2329 S->getStmtClass() <= lastBinaryOperatorConstant; 2330 } 2331 static bool classof(const BinaryOperator *) { return true; } 2332 2333 // Iterators 2334 virtual child_iterator child_begin(); 2335 virtual child_iterator child_end(); 2336 2337protected: 2338 BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, 2339 SourceLocation opLoc, bool dead) 2340 : Expr(CompoundAssignOperatorClass, ResTy, 2341 lhs->isTypeDependent() || rhs->isTypeDependent(), 2342 lhs->isValueDependent() || rhs->isValueDependent()), 2343 Opc(opc), OpLoc(opLoc) { 2344 SubExprs[LHS] = lhs; 2345 SubExprs[RHS] = rhs; 2346 } 2347 2348 BinaryOperator(StmtClass SC, EmptyShell Empty) 2349 : Expr(SC, Empty), Opc(BO_MulAssign) { } 2350}; 2351 2352/// CompoundAssignOperator - For compound assignments (e.g. +=), we keep 2353/// track of the type the operation is performed in. Due to the semantics of 2354/// these operators, the operands are promoted, the aritmetic performed, an 2355/// implicit conversion back to the result type done, then the assignment takes 2356/// place. This captures the intermediate type which the computation is done 2357/// in. 2358class CompoundAssignOperator : public BinaryOperator { 2359 QualType ComputationLHSType; 2360 QualType ComputationResultType; 2361public: 2362 CompoundAssignOperator(Expr *lhs, Expr *rhs, Opcode opc, 2363 QualType ResType, QualType CompLHSType, 2364 QualType CompResultType, 2365 SourceLocation OpLoc) 2366 : BinaryOperator(lhs, rhs, opc, ResType, OpLoc, true), 2367 ComputationLHSType(CompLHSType), 2368 ComputationResultType(CompResultType) { 2369 assert(isCompoundAssignmentOp() && 2370 "Only should be used for compound assignments"); 2371 } 2372 2373 /// \brief Build an empty compound assignment operator expression. 2374 explicit CompoundAssignOperator(EmptyShell Empty) 2375 : BinaryOperator(CompoundAssignOperatorClass, Empty) { } 2376 2377 // The two computation types are the type the LHS is converted 2378 // to for the computation and the type of the result; the two are 2379 // distinct in a few cases (specifically, int+=ptr and ptr-=ptr). 2380 QualType getComputationLHSType() const { return ComputationLHSType; } 2381 void setComputationLHSType(QualType T) { ComputationLHSType = T; } 2382 2383 QualType getComputationResultType() const { return ComputationResultType; } 2384 void setComputationResultType(QualType T) { ComputationResultType = T; } 2385 2386 static bool classof(const CompoundAssignOperator *) { return true; } 2387 static bool classof(const Stmt *S) { 2388 return S->getStmtClass() == CompoundAssignOperatorClass; 2389 } 2390}; 2391 2392/// ConditionalOperator - The ?: operator. Note that LHS may be null when the 2393/// GNU "missing LHS" extension is in use. 2394/// 2395class ConditionalOperator : public Expr { 2396 enum { COND, LHS, RHS, END_EXPR }; 2397 Stmt* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. 2398 Stmt* Save; 2399 SourceLocation QuestionLoc, ColonLoc; 2400public: 2401 ConditionalOperator(Expr *cond, SourceLocation QLoc, Expr *lhs, 2402 SourceLocation CLoc, Expr *rhs, Expr *save, QualType t) 2403 : Expr(ConditionalOperatorClass, t, 2404 // FIXME: the type of the conditional operator doesn't 2405 // depend on the type of the conditional, but the standard 2406 // seems to imply that it could. File a bug! 2407 ((lhs && lhs->isTypeDependent()) || (rhs && rhs->isTypeDependent())), 2408 (cond->isValueDependent() || 2409 (lhs && lhs->isValueDependent()) || 2410 (rhs && rhs->isValueDependent()))), 2411 QuestionLoc(QLoc), 2412 ColonLoc(CLoc) { 2413 SubExprs[COND] = cond; 2414 SubExprs[LHS] = lhs; 2415 SubExprs[RHS] = rhs; 2416 Save = save; 2417 } 2418 2419 /// \brief Build an empty conditional operator. 2420 explicit ConditionalOperator(EmptyShell Empty) 2421 : Expr(ConditionalOperatorClass, Empty) { } 2422 2423 // getCond - Return the expression representing the condition for 2424 // the ?: operator. 2425 Expr *getCond() const { return cast<Expr>(SubExprs[COND]); } 2426 void setCond(Expr *E) { SubExprs[COND] = E; } 2427 2428 // getTrueExpr - Return the subexpression representing the value of the ?: 2429 // expression if the condition evaluates to true. 2430 Expr *getTrueExpr() const { 2431 return cast<Expr>(SubExprs[LHS]); 2432 } 2433 2434 // getFalseExpr - Return the subexpression representing the value of the ?: 2435 // expression if the condition evaluates to false. This is the same as getRHS. 2436 Expr *getFalseExpr() const { return cast<Expr>(SubExprs[RHS]); } 2437 2438 // getSaveExpr - In most cases this value will be null. Except a GCC extension 2439 // allows the left subexpression to be omitted, and instead of that condition 2440 // be returned. e.g: x ?: y is shorthand for x ? x : y, except that the 2441 // expression "x" is only evaluated once. Under this senario, this function 2442 // returns the original, non-converted condition expression for the ?:operator 2443 Expr *getSaveExpr() const { return Save? cast<Expr>(Save) : (Expr*)0; } 2444 2445 Expr *getLHS() const { return Save ? 0 : cast<Expr>(SubExprs[LHS]); } 2446 void setLHS(Expr *E) { SubExprs[LHS] = E; } 2447 2448 Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 2449 void setRHS(Expr *E) { SubExprs[RHS] = E; } 2450 2451 Expr *getSAVE() const { return Save? cast<Expr>(Save) : (Expr*)0; } 2452 void setSAVE(Expr *E) { Save = E; } 2453 2454 SourceLocation getQuestionLoc() const { return QuestionLoc; } 2455 void setQuestionLoc(SourceLocation L) { QuestionLoc = L; } 2456 2457 SourceLocation getColonLoc() const { return ColonLoc; } 2458 void setColonLoc(SourceLocation L) { ColonLoc = L; } 2459 2460 virtual SourceRange getSourceRange() const { 2461 return SourceRange(getCond()->getLocStart(), getRHS()->getLocEnd()); 2462 } 2463 static bool classof(const Stmt *T) { 2464 return T->getStmtClass() == ConditionalOperatorClass; 2465 } 2466 static bool classof(const ConditionalOperator *) { return true; } 2467 2468 // Iterators 2469 virtual child_iterator child_begin(); 2470 virtual child_iterator child_end(); 2471}; 2472 2473/// AddrLabelExpr - The GNU address of label extension, representing &&label. 2474class AddrLabelExpr : public Expr { 2475 SourceLocation AmpAmpLoc, LabelLoc; 2476 LabelStmt *Label; 2477public: 2478 AddrLabelExpr(SourceLocation AALoc, SourceLocation LLoc, LabelStmt *L, 2479 QualType t) 2480 : Expr(AddrLabelExprClass, t, false, false), 2481 AmpAmpLoc(AALoc), LabelLoc(LLoc), Label(L) {} 2482 2483 /// \brief Build an empty address of a label expression. 2484 explicit AddrLabelExpr(EmptyShell Empty) 2485 : Expr(AddrLabelExprClass, Empty) { } 2486 2487 SourceLocation getAmpAmpLoc() const { return AmpAmpLoc; } 2488 void setAmpAmpLoc(SourceLocation L) { AmpAmpLoc = L; } 2489 SourceLocation getLabelLoc() const { return LabelLoc; } 2490 void setLabelLoc(SourceLocation L) { LabelLoc = L; } 2491 2492 virtual SourceRange getSourceRange() const { 2493 return SourceRange(AmpAmpLoc, LabelLoc); 2494 } 2495 2496 LabelStmt *getLabel() const { return Label; } 2497 void setLabel(LabelStmt *S) { Label = S; } 2498 2499 static bool classof(const Stmt *T) { 2500 return T->getStmtClass() == AddrLabelExprClass; 2501 } 2502 static bool classof(const AddrLabelExpr *) { return true; } 2503 2504 // Iterators 2505 virtual child_iterator child_begin(); 2506 virtual child_iterator child_end(); 2507}; 2508 2509/// StmtExpr - This is the GNU Statement Expression extension: ({int X=4; X;}). 2510/// The StmtExpr contains a single CompoundStmt node, which it evaluates and 2511/// takes the value of the last subexpression. 2512class StmtExpr : public Expr { 2513 Stmt *SubStmt; 2514 SourceLocation LParenLoc, RParenLoc; 2515public: 2516 // FIXME: Does type-dependence need to be computed differently? 2517 StmtExpr(CompoundStmt *substmt, QualType T, 2518 SourceLocation lp, SourceLocation rp) : 2519 Expr(StmtExprClass, T, T->isDependentType(), false), 2520 SubStmt(substmt), LParenLoc(lp), RParenLoc(rp) { } 2521 2522 /// \brief Build an empty statement expression. 2523 explicit StmtExpr(EmptyShell Empty) : Expr(StmtExprClass, Empty) { } 2524 2525 CompoundStmt *getSubStmt() { return cast<CompoundStmt>(SubStmt); } 2526 const CompoundStmt *getSubStmt() const { return cast<CompoundStmt>(SubStmt); } 2527 void setSubStmt(CompoundStmt *S) { SubStmt = S; } 2528 2529 virtual SourceRange getSourceRange() const { 2530 return SourceRange(LParenLoc, RParenLoc); 2531 } 2532 2533 SourceLocation getLParenLoc() const { return LParenLoc; } 2534 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 2535 SourceLocation getRParenLoc() const { return RParenLoc; } 2536 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2537 2538 static bool classof(const Stmt *T) { 2539 return T->getStmtClass() == StmtExprClass; 2540 } 2541 static bool classof(const StmtExpr *) { return true; } 2542 2543 // Iterators 2544 virtual child_iterator child_begin(); 2545 virtual child_iterator child_end(); 2546}; 2547 2548/// TypesCompatibleExpr - GNU builtin-in function __builtin_types_compatible_p. 2549/// This AST node represents a function that returns 1 if two *types* (not 2550/// expressions) are compatible. The result of this built-in function can be 2551/// used in integer constant expressions. 2552class TypesCompatibleExpr : public Expr { 2553 TypeSourceInfo *TInfo1; 2554 TypeSourceInfo *TInfo2; 2555 SourceLocation BuiltinLoc, RParenLoc; 2556public: 2557 TypesCompatibleExpr(QualType ReturnType, SourceLocation BLoc, 2558 TypeSourceInfo *tinfo1, TypeSourceInfo *tinfo2, 2559 SourceLocation RP) : 2560 Expr(TypesCompatibleExprClass, ReturnType, false, false), 2561 TInfo1(tinfo1), TInfo2(tinfo2), BuiltinLoc(BLoc), RParenLoc(RP) {} 2562 2563 /// \brief Build an empty __builtin_type_compatible_p expression. 2564 explicit TypesCompatibleExpr(EmptyShell Empty) 2565 : Expr(TypesCompatibleExprClass, Empty) { } 2566 2567 TypeSourceInfo *getArgTInfo1() const { return TInfo1; } 2568 void setArgTInfo1(TypeSourceInfo *TInfo) { TInfo1 = TInfo; } 2569 TypeSourceInfo *getArgTInfo2() const { return TInfo2; } 2570 void setArgTInfo2(TypeSourceInfo *TInfo) { TInfo2 = TInfo; } 2571 2572 QualType getArgType1() const { return TInfo1->getType(); } 2573 QualType getArgType2() const { return TInfo2->getType(); } 2574 2575 SourceLocation getBuiltinLoc() const { return BuiltinLoc; } 2576 void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } 2577 2578 SourceLocation getRParenLoc() const { return RParenLoc; } 2579 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2580 2581 virtual SourceRange getSourceRange() const { 2582 return SourceRange(BuiltinLoc, RParenLoc); 2583 } 2584 static bool classof(const Stmt *T) { 2585 return T->getStmtClass() == TypesCompatibleExprClass; 2586 } 2587 static bool classof(const TypesCompatibleExpr *) { return true; } 2588 2589 // Iterators 2590 virtual child_iterator child_begin(); 2591 virtual child_iterator child_end(); 2592}; 2593 2594/// ShuffleVectorExpr - clang-specific builtin-in function 2595/// __builtin_shufflevector. 2596/// This AST node represents a operator that does a constant 2597/// shuffle, similar to LLVM's shufflevector instruction. It takes 2598/// two vectors and a variable number of constant indices, 2599/// and returns the appropriately shuffled vector. 2600class ShuffleVectorExpr : public Expr { 2601 SourceLocation BuiltinLoc, RParenLoc; 2602 2603 // SubExprs - the list of values passed to the __builtin_shufflevector 2604 // function. The first two are vectors, and the rest are constant 2605 // indices. The number of values in this list is always 2606 // 2+the number of indices in the vector type. 2607 Stmt **SubExprs; 2608 unsigned NumExprs; 2609 2610public: 2611 // FIXME: Can a shufflevector be value-dependent? Does type-dependence need 2612 // to be computed differently? 2613 ShuffleVectorExpr(ASTContext &C, Expr **args, unsigned nexpr, 2614 QualType Type, SourceLocation BLoc, 2615 SourceLocation RP) : 2616 Expr(ShuffleVectorExprClass, Type, Type->isDependentType(), false), 2617 BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(nexpr) { 2618 2619 SubExprs = new (C) Stmt*[nexpr]; 2620 for (unsigned i = 0; i < nexpr; i++) 2621 SubExprs[i] = args[i]; 2622 } 2623 2624 /// \brief Build an empty vector-shuffle expression. 2625 explicit ShuffleVectorExpr(EmptyShell Empty) 2626 : Expr(ShuffleVectorExprClass, Empty), SubExprs(0) { } 2627 2628 SourceLocation getBuiltinLoc() const { return BuiltinLoc; } 2629 void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } 2630 2631 SourceLocation getRParenLoc() const { return RParenLoc; } 2632 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2633 2634 virtual SourceRange getSourceRange() const { 2635 return SourceRange(BuiltinLoc, RParenLoc); 2636 } 2637 static bool classof(const Stmt *T) { 2638 return T->getStmtClass() == ShuffleVectorExprClass; 2639 } 2640 static bool classof(const ShuffleVectorExpr *) { return true; } 2641 2642 /// getNumSubExprs - Return the size of the SubExprs array. This includes the 2643 /// constant expression, the actual arguments passed in, and the function 2644 /// pointers. 2645 unsigned getNumSubExprs() const { return NumExprs; } 2646 2647 /// getExpr - Return the Expr at the specified index. 2648 Expr *getExpr(unsigned Index) { 2649 assert((Index < NumExprs) && "Arg access out of range!"); 2650 return cast<Expr>(SubExprs[Index]); 2651 } 2652 const Expr *getExpr(unsigned Index) const { 2653 assert((Index < NumExprs) && "Arg access out of range!"); 2654 return cast<Expr>(SubExprs[Index]); 2655 } 2656 2657 void setExprs(ASTContext &C, Expr ** Exprs, unsigned NumExprs); 2658 2659 unsigned getShuffleMaskIdx(ASTContext &Ctx, unsigned N) { 2660 assert((N < NumExprs - 2) && "Shuffle idx out of range!"); 2661 return getExpr(N+2)->EvaluateAsInt(Ctx).getZExtValue(); 2662 } 2663 2664 // Iterators 2665 virtual child_iterator child_begin(); 2666 virtual child_iterator child_end(); 2667}; 2668 2669/// ChooseExpr - GNU builtin-in function __builtin_choose_expr. 2670/// This AST node is similar to the conditional operator (?:) in C, with 2671/// the following exceptions: 2672/// - the test expression must be a integer constant expression. 2673/// - the expression returned acts like the chosen subexpression in every 2674/// visible way: the type is the same as that of the chosen subexpression, 2675/// and all predicates (whether it's an l-value, whether it's an integer 2676/// constant expression, etc.) return the same result as for the chosen 2677/// sub-expression. 2678class ChooseExpr : public Expr { 2679 enum { COND, LHS, RHS, END_EXPR }; 2680 Stmt* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. 2681 SourceLocation BuiltinLoc, RParenLoc; 2682public: 2683 ChooseExpr(SourceLocation BLoc, Expr *cond, Expr *lhs, Expr *rhs, QualType t, 2684 SourceLocation RP, bool TypeDependent, bool ValueDependent) 2685 : Expr(ChooseExprClass, t, TypeDependent, ValueDependent), 2686 BuiltinLoc(BLoc), RParenLoc(RP) { 2687 SubExprs[COND] = cond; 2688 SubExprs[LHS] = lhs; 2689 SubExprs[RHS] = rhs; 2690 } 2691 2692 /// \brief Build an empty __builtin_choose_expr. 2693 explicit ChooseExpr(EmptyShell Empty) : Expr(ChooseExprClass, Empty) { } 2694 2695 /// isConditionTrue - Return whether the condition is true (i.e. not 2696 /// equal to zero). 2697 bool isConditionTrue(ASTContext &C) const; 2698 2699 /// getChosenSubExpr - Return the subexpression chosen according to the 2700 /// condition. 2701 Expr *getChosenSubExpr(ASTContext &C) const { 2702 return isConditionTrue(C) ? getLHS() : getRHS(); 2703 } 2704 2705 Expr *getCond() const { return cast<Expr>(SubExprs[COND]); } 2706 void setCond(Expr *E) { SubExprs[COND] = E; } 2707 Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } 2708 void setLHS(Expr *E) { SubExprs[LHS] = E; } 2709 Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 2710 void setRHS(Expr *E) { SubExprs[RHS] = E; } 2711 2712 SourceLocation getBuiltinLoc() const { return BuiltinLoc; } 2713 void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } 2714 2715 SourceLocation getRParenLoc() const { return RParenLoc; } 2716 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2717 2718 virtual SourceRange getSourceRange() const { 2719 return SourceRange(BuiltinLoc, RParenLoc); 2720 } 2721 static bool classof(const Stmt *T) { 2722 return T->getStmtClass() == ChooseExprClass; 2723 } 2724 static bool classof(const ChooseExpr *) { return true; } 2725 2726 // Iterators 2727 virtual child_iterator child_begin(); 2728 virtual child_iterator child_end(); 2729}; 2730 2731/// GNUNullExpr - Implements the GNU __null extension, which is a name 2732/// for a null pointer constant that has integral type (e.g., int or 2733/// long) and is the same size and alignment as a pointer. The __null 2734/// extension is typically only used by system headers, which define 2735/// NULL as __null in C++ rather than using 0 (which is an integer 2736/// that may not match the size of a pointer). 2737class GNUNullExpr : public Expr { 2738 /// TokenLoc - The location of the __null keyword. 2739 SourceLocation TokenLoc; 2740 2741public: 2742 GNUNullExpr(QualType Ty, SourceLocation Loc) 2743 : Expr(GNUNullExprClass, Ty, false, false), TokenLoc(Loc) { } 2744 2745 /// \brief Build an empty GNU __null expression. 2746 explicit GNUNullExpr(EmptyShell Empty) : Expr(GNUNullExprClass, Empty) { } 2747 2748 /// getTokenLocation - The location of the __null token. 2749 SourceLocation getTokenLocation() const { return TokenLoc; } 2750 void setTokenLocation(SourceLocation L) { TokenLoc = L; } 2751 2752 virtual SourceRange getSourceRange() const { 2753 return SourceRange(TokenLoc); 2754 } 2755 static bool classof(const Stmt *T) { 2756 return T->getStmtClass() == GNUNullExprClass; 2757 } 2758 static bool classof(const GNUNullExpr *) { return true; } 2759 2760 // Iterators 2761 virtual child_iterator child_begin(); 2762 virtual child_iterator child_end(); 2763}; 2764 2765/// VAArgExpr, used for the builtin function __builtin_va_arg. 2766class VAArgExpr : public Expr { 2767 Stmt *Val; 2768 TypeSourceInfo *TInfo; 2769 SourceLocation BuiltinLoc, RParenLoc; 2770public: 2771 VAArgExpr(SourceLocation BLoc, Expr* e, TypeSourceInfo *TInfo, 2772 SourceLocation RPLoc, QualType t) 2773 : Expr(VAArgExprClass, t, t->isDependentType(), false), 2774 Val(e), TInfo(TInfo), 2775 BuiltinLoc(BLoc), 2776 RParenLoc(RPLoc) { } 2777 2778 /// \brief Create an empty __builtin_va_arg expression. 2779 explicit VAArgExpr(EmptyShell Empty) : Expr(VAArgExprClass, Empty) { } 2780 2781 const Expr *getSubExpr() const { return cast<Expr>(Val); } 2782 Expr *getSubExpr() { return cast<Expr>(Val); } 2783 void setSubExpr(Expr *E) { Val = E; } 2784 2785 TypeSourceInfo *getWrittenTypeInfo() const { return TInfo; } 2786 void setWrittenTypeInfo(TypeSourceInfo *TI) { TInfo = TI; } 2787 2788 SourceLocation getBuiltinLoc() const { return BuiltinLoc; } 2789 void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } 2790 2791 SourceLocation getRParenLoc() const { return RParenLoc; } 2792 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2793 2794 virtual SourceRange getSourceRange() const { 2795 return SourceRange(BuiltinLoc, RParenLoc); 2796 } 2797 static bool classof(const Stmt *T) { 2798 return T->getStmtClass() == VAArgExprClass; 2799 } 2800 static bool classof(const VAArgExpr *) { return true; } 2801 2802 // Iterators 2803 virtual child_iterator child_begin(); 2804 virtual child_iterator child_end(); 2805}; 2806 2807/// @brief Describes an C or C++ initializer list. 2808/// 2809/// InitListExpr describes an initializer list, which can be used to 2810/// initialize objects of different types, including 2811/// struct/class/union types, arrays, and vectors. For example: 2812/// 2813/// @code 2814/// struct foo x = { 1, { 2, 3 } }; 2815/// @endcode 2816/// 2817/// Prior to semantic analysis, an initializer list will represent the 2818/// initializer list as written by the user, but will have the 2819/// placeholder type "void". This initializer list is called the 2820/// syntactic form of the initializer, and may contain C99 designated 2821/// initializers (represented as DesignatedInitExprs), initializations 2822/// of subobject members without explicit braces, and so on. Clients 2823/// interested in the original syntax of the initializer list should 2824/// use the syntactic form of the initializer list. 2825/// 2826/// After semantic analysis, the initializer list will represent the 2827/// semantic form of the initializer, where the initializations of all 2828/// subobjects are made explicit with nested InitListExpr nodes and 2829/// C99 designators have been eliminated by placing the designated 2830/// initializations into the subobject they initialize. Additionally, 2831/// any "holes" in the initialization, where no initializer has been 2832/// specified for a particular subobject, will be replaced with 2833/// implicitly-generated ImplicitValueInitExpr expressions that 2834/// value-initialize the subobjects. Note, however, that the 2835/// initializer lists may still have fewer initializers than there are 2836/// elements to initialize within the object. 2837/// 2838/// Given the semantic form of the initializer list, one can retrieve 2839/// the original syntactic form of that initializer list (if it 2840/// exists) using getSyntacticForm(). Since many initializer lists 2841/// have the same syntactic and semantic forms, getSyntacticForm() may 2842/// return NULL, indicating that the current initializer list also 2843/// serves as its syntactic form. 2844class InitListExpr : public Expr { 2845 // FIXME: Eliminate this vector in favor of ASTContext allocation 2846 typedef ASTVector<Stmt *> InitExprsTy; 2847 InitExprsTy InitExprs; 2848 SourceLocation LBraceLoc, RBraceLoc; 2849 2850 /// Contains the initializer list that describes the syntactic form 2851 /// written in the source code. 2852 InitListExpr *SyntacticForm; 2853 2854 /// If this initializer list initializes a union, specifies which 2855 /// field within the union will be initialized. 2856 FieldDecl *UnionFieldInit; 2857 2858 /// Whether this initializer list originally had a GNU array-range 2859 /// designator in it. This is a temporary marker used by CodeGen. 2860 bool HadArrayRangeDesignator; 2861 2862public: 2863 InitListExpr(ASTContext &C, SourceLocation lbraceloc, 2864 Expr **initexprs, unsigned numinits, 2865 SourceLocation rbraceloc); 2866 2867 /// \brief Build an empty initializer list. 2868 explicit InitListExpr(ASTContext &C, EmptyShell Empty) 2869 : Expr(InitListExprClass, Empty), InitExprs(C) { } 2870 2871 unsigned getNumInits() const { return InitExprs.size(); } 2872 2873 const Expr *getInit(unsigned Init) const { 2874 assert(Init < getNumInits() && "Initializer access out of range!"); 2875 return cast_or_null<Expr>(InitExprs[Init]); 2876 } 2877 2878 Expr *getInit(unsigned Init) { 2879 assert(Init < getNumInits() && "Initializer access out of range!"); 2880 return cast_or_null<Expr>(InitExprs[Init]); 2881 } 2882 2883 void setInit(unsigned Init, Expr *expr) { 2884 assert(Init < getNumInits() && "Initializer access out of range!"); 2885 InitExprs[Init] = expr; 2886 } 2887 2888 /// \brief Reserve space for some number of initializers. 2889 void reserveInits(ASTContext &C, unsigned NumInits); 2890 2891 /// @brief Specify the number of initializers 2892 /// 2893 /// If there are more than @p NumInits initializers, the remaining 2894 /// initializers will be destroyed. If there are fewer than @p 2895 /// NumInits initializers, NULL expressions will be added for the 2896 /// unknown initializers. 2897 void resizeInits(ASTContext &Context, unsigned NumInits); 2898 2899 /// @brief Updates the initializer at index @p Init with the new 2900 /// expression @p expr, and returns the old expression at that 2901 /// location. 2902 /// 2903 /// When @p Init is out of range for this initializer list, the 2904 /// initializer list will be extended with NULL expressions to 2905 /// accomodate the new entry. 2906 Expr *updateInit(ASTContext &C, unsigned Init, Expr *expr); 2907 2908 /// \brief If this initializes a union, specifies which field in the 2909 /// union to initialize. 2910 /// 2911 /// Typically, this field is the first named field within the 2912 /// union. However, a designated initializer can specify the 2913 /// initialization of a different field within the union. 2914 FieldDecl *getInitializedFieldInUnion() { return UnionFieldInit; } 2915 void setInitializedFieldInUnion(FieldDecl *FD) { UnionFieldInit = FD; } 2916 2917 // Explicit InitListExpr's originate from source code (and have valid source 2918 // locations). Implicit InitListExpr's are created by the semantic analyzer. 2919 bool isExplicit() { 2920 return LBraceLoc.isValid() && RBraceLoc.isValid(); 2921 } 2922 2923 SourceLocation getLBraceLoc() const { return LBraceLoc; } 2924 void setLBraceLoc(SourceLocation Loc) { LBraceLoc = Loc; } 2925 SourceLocation getRBraceLoc() const { return RBraceLoc; } 2926 void setRBraceLoc(SourceLocation Loc) { RBraceLoc = Loc; } 2927 2928 /// @brief Retrieve the initializer list that describes the 2929 /// syntactic form of the initializer. 2930 /// 2931 /// 2932 InitListExpr *getSyntacticForm() const { return SyntacticForm; } 2933 void setSyntacticForm(InitListExpr *Init) { SyntacticForm = Init; } 2934 2935 bool hadArrayRangeDesignator() const { return HadArrayRangeDesignator; } 2936 void sawArrayRangeDesignator(bool ARD = true) { 2937 HadArrayRangeDesignator = ARD; 2938 } 2939 2940 virtual SourceRange getSourceRange() const { 2941 return SourceRange(LBraceLoc, RBraceLoc); 2942 } 2943 static bool classof(const Stmt *T) { 2944 return T->getStmtClass() == InitListExprClass; 2945 } 2946 static bool classof(const InitListExpr *) { return true; } 2947 2948 // Iterators 2949 virtual child_iterator child_begin(); 2950 virtual child_iterator child_end(); 2951 2952 typedef InitExprsTy::iterator iterator; 2953 typedef InitExprsTy::const_iterator const_iterator; 2954 typedef InitExprsTy::reverse_iterator reverse_iterator; 2955 typedef InitExprsTy::const_reverse_iterator const_reverse_iterator; 2956 2957 iterator begin() { return InitExprs.begin(); } 2958 const_iterator begin() const { return InitExprs.begin(); } 2959 iterator end() { return InitExprs.end(); } 2960 const_iterator end() const { return InitExprs.end(); } 2961 reverse_iterator rbegin() { return InitExprs.rbegin(); } 2962 const_reverse_iterator rbegin() const { return InitExprs.rbegin(); } 2963 reverse_iterator rend() { return InitExprs.rend(); } 2964 const_reverse_iterator rend() const { return InitExprs.rend(); } 2965}; 2966 2967/// @brief Represents a C99 designated initializer expression. 2968/// 2969/// A designated initializer expression (C99 6.7.8) contains one or 2970/// more designators (which can be field designators, array 2971/// designators, or GNU array-range designators) followed by an 2972/// expression that initializes the field or element(s) that the 2973/// designators refer to. For example, given: 2974/// 2975/// @code 2976/// struct point { 2977/// double x; 2978/// double y; 2979/// }; 2980/// struct point ptarray[10] = { [2].y = 1.0, [2].x = 2.0, [0].x = 1.0 }; 2981/// @endcode 2982/// 2983/// The InitListExpr contains three DesignatedInitExprs, the first of 2984/// which covers @c [2].y=1.0. This DesignatedInitExpr will have two 2985/// designators, one array designator for @c [2] followed by one field 2986/// designator for @c .y. The initalization expression will be 1.0. 2987class DesignatedInitExpr : public Expr { 2988public: 2989 /// \brief Forward declaration of the Designator class. 2990 class Designator; 2991 2992private: 2993 /// The location of the '=' or ':' prior to the actual initializer 2994 /// expression. 2995 SourceLocation EqualOrColonLoc; 2996 2997 /// Whether this designated initializer used the GNU deprecated 2998 /// syntax rather than the C99 '=' syntax. 2999 bool GNUSyntax : 1; 3000 3001 /// The number of designators in this initializer expression. 3002 unsigned NumDesignators : 15; 3003 3004 /// \brief The designators in this designated initialization 3005 /// expression. 3006 Designator *Designators; 3007 3008 /// The number of subexpressions of this initializer expression, 3009 /// which contains both the initializer and any additional 3010 /// expressions used by array and array-range designators. 3011 unsigned NumSubExprs : 16; 3012 3013 3014 DesignatedInitExpr(ASTContext &C, QualType Ty, unsigned NumDesignators, 3015 const Designator *Designators, 3016 SourceLocation EqualOrColonLoc, bool GNUSyntax, 3017 Expr **IndexExprs, unsigned NumIndexExprs, 3018 Expr *Init); 3019 3020 explicit DesignatedInitExpr(unsigned NumSubExprs) 3021 : Expr(DesignatedInitExprClass, EmptyShell()), 3022 NumDesignators(0), Designators(0), NumSubExprs(NumSubExprs) { } 3023 3024public: 3025 /// A field designator, e.g., ".x". 3026 struct FieldDesignator { 3027 /// Refers to the field that is being initialized. The low bit 3028 /// of this field determines whether this is actually a pointer 3029 /// to an IdentifierInfo (if 1) or a FieldDecl (if 0). When 3030 /// initially constructed, a field designator will store an 3031 /// IdentifierInfo*. After semantic analysis has resolved that 3032 /// name, the field designator will instead store a FieldDecl*. 3033 uintptr_t NameOrField; 3034 3035 /// The location of the '.' in the designated initializer. 3036 unsigned DotLoc; 3037 3038 /// The location of the field name in the designated initializer. 3039 unsigned FieldLoc; 3040 }; 3041 3042 /// An array or GNU array-range designator, e.g., "[9]" or "[10..15]". 3043 struct ArrayOrRangeDesignator { 3044 /// Location of the first index expression within the designated 3045 /// initializer expression's list of subexpressions. 3046 unsigned Index; 3047 /// The location of the '[' starting the array range designator. 3048 unsigned LBracketLoc; 3049 /// The location of the ellipsis separating the start and end 3050 /// indices. Only valid for GNU array-range designators. 3051 unsigned EllipsisLoc; 3052 /// The location of the ']' terminating the array range designator. 3053 unsigned RBracketLoc; 3054 }; 3055 3056 /// @brief Represents a single C99 designator. 3057 /// 3058 /// @todo This class is infuriatingly similar to clang::Designator, 3059 /// but minor differences (storing indices vs. storing pointers) 3060 /// keep us from reusing it. Try harder, later, to rectify these 3061 /// differences. 3062 class Designator { 3063 /// @brief The kind of designator this describes. 3064 enum { 3065 FieldDesignator, 3066 ArrayDesignator, 3067 ArrayRangeDesignator 3068 } Kind; 3069 3070 union { 3071 /// A field designator, e.g., ".x". 3072 struct FieldDesignator Field; 3073 /// An array or GNU array-range designator, e.g., "[9]" or "[10..15]". 3074 struct ArrayOrRangeDesignator ArrayOrRange; 3075 }; 3076 friend class DesignatedInitExpr; 3077 3078 public: 3079 Designator() {} 3080 3081 /// @brief Initializes a field designator. 3082 Designator(const IdentifierInfo *FieldName, SourceLocation DotLoc, 3083 SourceLocation FieldLoc) 3084 : Kind(FieldDesignator) { 3085 Field.NameOrField = reinterpret_cast<uintptr_t>(FieldName) | 0x01; 3086 Field.DotLoc = DotLoc.getRawEncoding(); 3087 Field.FieldLoc = FieldLoc.getRawEncoding(); 3088 } 3089 3090 /// @brief Initializes an array designator. 3091 Designator(unsigned Index, SourceLocation LBracketLoc, 3092 SourceLocation RBracketLoc) 3093 : Kind(ArrayDesignator) { 3094 ArrayOrRange.Index = Index; 3095 ArrayOrRange.LBracketLoc = LBracketLoc.getRawEncoding(); 3096 ArrayOrRange.EllipsisLoc = SourceLocation().getRawEncoding(); 3097 ArrayOrRange.RBracketLoc = RBracketLoc.getRawEncoding(); 3098 } 3099 3100 /// @brief Initializes a GNU array-range designator. 3101 Designator(unsigned Index, SourceLocation LBracketLoc, 3102 SourceLocation EllipsisLoc, SourceLocation RBracketLoc) 3103 : Kind(ArrayRangeDesignator) { 3104 ArrayOrRange.Index = Index; 3105 ArrayOrRange.LBracketLoc = LBracketLoc.getRawEncoding(); 3106 ArrayOrRange.EllipsisLoc = EllipsisLoc.getRawEncoding(); 3107 ArrayOrRange.RBracketLoc = RBracketLoc.getRawEncoding(); 3108 } 3109 3110 bool isFieldDesignator() const { return Kind == FieldDesignator; } 3111 bool isArrayDesignator() const { return Kind == ArrayDesignator; } 3112 bool isArrayRangeDesignator() const { return Kind == ArrayRangeDesignator; } 3113 3114 IdentifierInfo * getFieldName(); 3115 3116 FieldDecl *getField() { 3117 assert(Kind == FieldDesignator && "Only valid on a field designator"); 3118 if (Field.NameOrField & 0x01) 3119 return 0; 3120 else 3121 return reinterpret_cast<FieldDecl *>(Field.NameOrField); 3122 } 3123 3124 void setField(FieldDecl *FD) { 3125 assert(Kind == FieldDesignator && "Only valid on a field designator"); 3126 Field.NameOrField = reinterpret_cast<uintptr_t>(FD); 3127 } 3128 3129 SourceLocation getDotLoc() const { 3130 assert(Kind == FieldDesignator && "Only valid on a field designator"); 3131 return SourceLocation::getFromRawEncoding(Field.DotLoc); 3132 } 3133 3134 SourceLocation getFieldLoc() const { 3135 assert(Kind == FieldDesignator && "Only valid on a field designator"); 3136 return SourceLocation::getFromRawEncoding(Field.FieldLoc); 3137 } 3138 3139 SourceLocation getLBracketLoc() const { 3140 assert((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && 3141 "Only valid on an array or array-range designator"); 3142 return SourceLocation::getFromRawEncoding(ArrayOrRange.LBracketLoc); 3143 } 3144 3145 SourceLocation getRBracketLoc() const { 3146 assert((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && 3147 "Only valid on an array or array-range designator"); 3148 return SourceLocation::getFromRawEncoding(ArrayOrRange.RBracketLoc); 3149 } 3150 3151 SourceLocation getEllipsisLoc() const { 3152 assert(Kind == ArrayRangeDesignator && 3153 "Only valid on an array-range designator"); 3154 return SourceLocation::getFromRawEncoding(ArrayOrRange.EllipsisLoc); 3155 } 3156 3157 unsigned getFirstExprIndex() const { 3158 assert((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && 3159 "Only valid on an array or array-range designator"); 3160 return ArrayOrRange.Index; 3161 } 3162 3163 SourceLocation getStartLocation() const { 3164 if (Kind == FieldDesignator) 3165 return getDotLoc().isInvalid()? getFieldLoc() : getDotLoc(); 3166 else 3167 return getLBracketLoc(); 3168 } 3169 }; 3170 3171 static DesignatedInitExpr *Create(ASTContext &C, Designator *Designators, 3172 unsigned NumDesignators, 3173 Expr **IndexExprs, unsigned NumIndexExprs, 3174 SourceLocation EqualOrColonLoc, 3175 bool GNUSyntax, Expr *Init); 3176 3177 static DesignatedInitExpr *CreateEmpty(ASTContext &C, unsigned NumIndexExprs); 3178 3179 /// @brief Returns the number of designators in this initializer. 3180 unsigned size() const { return NumDesignators; } 3181 3182 // Iterator access to the designators. 3183 typedef Designator* designators_iterator; 3184 designators_iterator designators_begin() { return Designators; } 3185 designators_iterator designators_end() { 3186 return Designators + NumDesignators; 3187 } 3188 3189 Designator *getDesignator(unsigned Idx) { return &designators_begin()[Idx]; } 3190 3191 void setDesignators(ASTContext &C, const Designator *Desigs, 3192 unsigned NumDesigs); 3193 3194 Expr *getArrayIndex(const Designator& D); 3195 Expr *getArrayRangeStart(const Designator& D); 3196 Expr *getArrayRangeEnd(const Designator& D); 3197 3198 /// @brief Retrieve the location of the '=' that precedes the 3199 /// initializer value itself, if present. 3200 SourceLocation getEqualOrColonLoc() const { return EqualOrColonLoc; } 3201 void setEqualOrColonLoc(SourceLocation L) { EqualOrColonLoc = L; } 3202 3203 /// @brief Determines whether this designated initializer used the 3204 /// deprecated GNU syntax for designated initializers. 3205 bool usesGNUSyntax() const { return GNUSyntax; } 3206 void setGNUSyntax(bool GNU) { GNUSyntax = GNU; } 3207 3208 /// @brief Retrieve the initializer value. 3209 Expr *getInit() const { 3210 return cast<Expr>(*const_cast<DesignatedInitExpr*>(this)->child_begin()); 3211 } 3212 3213 void setInit(Expr *init) { 3214 *child_begin() = init; 3215 } 3216 3217 /// \brief Retrieve the total number of subexpressions in this 3218 /// designated initializer expression, including the actual 3219 /// initialized value and any expressions that occur within array 3220 /// and array-range designators. 3221 unsigned getNumSubExprs() const { return NumSubExprs; } 3222 3223 Expr *getSubExpr(unsigned Idx) { 3224 assert(Idx < NumSubExprs && "Subscript out of range"); 3225 char* Ptr = static_cast<char*>(static_cast<void *>(this)); 3226 Ptr += sizeof(DesignatedInitExpr); 3227 return reinterpret_cast<Expr**>(reinterpret_cast<void**>(Ptr))[Idx]; 3228 } 3229 3230 void setSubExpr(unsigned Idx, Expr *E) { 3231 assert(Idx < NumSubExprs && "Subscript out of range"); 3232 char* Ptr = static_cast<char*>(static_cast<void *>(this)); 3233 Ptr += sizeof(DesignatedInitExpr); 3234 reinterpret_cast<Expr**>(reinterpret_cast<void**>(Ptr))[Idx] = E; 3235 } 3236 3237 /// \brief Replaces the designator at index @p Idx with the series 3238 /// of designators in [First, Last). 3239 void ExpandDesignator(ASTContext &C, unsigned Idx, const Designator *First, 3240 const Designator *Last); 3241 3242 virtual SourceRange getSourceRange() const; 3243 3244 static bool classof(const Stmt *T) { 3245 return T->getStmtClass() == DesignatedInitExprClass; 3246 } 3247 static bool classof(const DesignatedInitExpr *) { return true; } 3248 3249 // Iterators 3250 virtual child_iterator child_begin(); 3251 virtual child_iterator child_end(); 3252}; 3253 3254/// \brief Represents an implicitly-generated value initialization of 3255/// an object of a given type. 3256/// 3257/// Implicit value initializations occur within semantic initializer 3258/// list expressions (InitListExpr) as placeholders for subobject 3259/// initializations not explicitly specified by the user. 3260/// 3261/// \see InitListExpr 3262class ImplicitValueInitExpr : public Expr { 3263public: 3264 explicit ImplicitValueInitExpr(QualType ty) 3265 : Expr(ImplicitValueInitExprClass, ty, false, false) { } 3266 3267 /// \brief Construct an empty implicit value initialization. 3268 explicit ImplicitValueInitExpr(EmptyShell Empty) 3269 : Expr(ImplicitValueInitExprClass, Empty) { } 3270 3271 static bool classof(const Stmt *T) { 3272 return T->getStmtClass() == ImplicitValueInitExprClass; 3273 } 3274 static bool classof(const ImplicitValueInitExpr *) { return true; } 3275 3276 virtual SourceRange getSourceRange() const { 3277 return SourceRange(); 3278 } 3279 3280 // Iterators 3281 virtual child_iterator child_begin(); 3282 virtual child_iterator child_end(); 3283}; 3284 3285 3286class ParenListExpr : public Expr { 3287 Stmt **Exprs; 3288 unsigned NumExprs; 3289 SourceLocation LParenLoc, RParenLoc; 3290 3291public: 3292 ParenListExpr(ASTContext& C, SourceLocation lparenloc, Expr **exprs, 3293 unsigned numexprs, SourceLocation rparenloc); 3294 3295 /// \brief Build an empty paren list. 3296 explicit ParenListExpr(EmptyShell Empty) : Expr(ParenListExprClass, Empty) { } 3297 3298 unsigned getNumExprs() const { return NumExprs; } 3299 3300 const Expr* getExpr(unsigned Init) const { 3301 assert(Init < getNumExprs() && "Initializer access out of range!"); 3302 return cast_or_null<Expr>(Exprs[Init]); 3303 } 3304 3305 Expr* getExpr(unsigned Init) { 3306 assert(Init < getNumExprs() && "Initializer access out of range!"); 3307 return cast_or_null<Expr>(Exprs[Init]); 3308 } 3309 3310 Expr **getExprs() { return reinterpret_cast<Expr **>(Exprs); } 3311 3312 SourceLocation getLParenLoc() const { return LParenLoc; } 3313 SourceLocation getRParenLoc() const { return RParenLoc; } 3314 3315 virtual SourceRange getSourceRange() const { 3316 return SourceRange(LParenLoc, RParenLoc); 3317 } 3318 static bool classof(const Stmt *T) { 3319 return T->getStmtClass() == ParenListExprClass; 3320 } 3321 static bool classof(const ParenListExpr *) { return true; } 3322 3323 // Iterators 3324 virtual child_iterator child_begin(); 3325 virtual child_iterator child_end(); 3326 3327 friend class ASTStmtReader; 3328 friend class ASTStmtWriter; 3329}; 3330 3331 3332//===----------------------------------------------------------------------===// 3333// Clang Extensions 3334//===----------------------------------------------------------------------===// 3335 3336 3337/// ExtVectorElementExpr - This represents access to specific elements of a 3338/// vector, and may occur on the left hand side or right hand side. For example 3339/// the following is legal: "V.xy = V.zw" if V is a 4 element extended vector. 3340/// 3341/// Note that the base may have either vector or pointer to vector type, just 3342/// like a struct field reference. 3343/// 3344class ExtVectorElementExpr : public Expr { 3345 Stmt *Base; 3346 IdentifierInfo *Accessor; 3347 SourceLocation AccessorLoc; 3348public: 3349 ExtVectorElementExpr(QualType ty, Expr *base, IdentifierInfo &accessor, 3350 SourceLocation loc) 3351 : Expr(ExtVectorElementExprClass, ty, base->isTypeDependent(), 3352 base->isValueDependent()), 3353 Base(base), Accessor(&accessor), AccessorLoc(loc) {} 3354 3355 /// \brief Build an empty vector element expression. 3356 explicit ExtVectorElementExpr(EmptyShell Empty) 3357 : Expr(ExtVectorElementExprClass, Empty) { } 3358 3359 const Expr *getBase() const { return cast<Expr>(Base); } 3360 Expr *getBase() { return cast<Expr>(Base); } 3361 void setBase(Expr *E) { Base = E; } 3362 3363 IdentifierInfo &getAccessor() const { return *Accessor; } 3364 void setAccessor(IdentifierInfo *II) { Accessor = II; } 3365 3366 SourceLocation getAccessorLoc() const { return AccessorLoc; } 3367 void setAccessorLoc(SourceLocation L) { AccessorLoc = L; } 3368 3369 /// getNumElements - Get the number of components being selected. 3370 unsigned getNumElements() const; 3371 3372 /// containsDuplicateElements - Return true if any element access is 3373 /// repeated. 3374 bool containsDuplicateElements() const; 3375 3376 /// getEncodedElementAccess - Encode the elements accessed into an llvm 3377 /// aggregate Constant of ConstantInt(s). 3378 void getEncodedElementAccess(llvm::SmallVectorImpl<unsigned> &Elts) const; 3379 3380 virtual SourceRange getSourceRange() const { 3381 return SourceRange(getBase()->getLocStart(), AccessorLoc); 3382 } 3383 3384 /// isArrow - Return true if the base expression is a pointer to vector, 3385 /// return false if the base expression is a vector. 3386 bool isArrow() const; 3387 3388 static bool classof(const Stmt *T) { 3389 return T->getStmtClass() == ExtVectorElementExprClass; 3390 } 3391 static bool classof(const ExtVectorElementExpr *) { return true; } 3392 3393 // Iterators 3394 virtual child_iterator child_begin(); 3395 virtual child_iterator child_end(); 3396}; 3397 3398 3399/// BlockExpr - Adaptor class for mixing a BlockDecl with expressions. 3400/// ^{ statement-body } or ^(int arg1, float arg2){ statement-body } 3401class BlockExpr : public Expr { 3402protected: 3403 BlockDecl *TheBlock; 3404 bool HasBlockDeclRefExprs; 3405public: 3406 BlockExpr(BlockDecl *BD, QualType ty, bool hasBlockDeclRefExprs) 3407 : Expr(BlockExprClass, ty, ty->isDependentType(), false), 3408 TheBlock(BD), HasBlockDeclRefExprs(hasBlockDeclRefExprs) {} 3409 3410 /// \brief Build an empty block expression. 3411 explicit BlockExpr(EmptyShell Empty) : Expr(BlockExprClass, Empty) { } 3412 3413 const BlockDecl *getBlockDecl() const { return TheBlock; } 3414 BlockDecl *getBlockDecl() { return TheBlock; } 3415 void setBlockDecl(BlockDecl *BD) { TheBlock = BD; } 3416 3417 // Convenience functions for probing the underlying BlockDecl. 3418 SourceLocation getCaretLocation() const; 3419 const Stmt *getBody() const; 3420 Stmt *getBody(); 3421 3422 virtual SourceRange getSourceRange() const { 3423 return SourceRange(getCaretLocation(), getBody()->getLocEnd()); 3424 } 3425 3426 /// getFunctionType - Return the underlying function type for this block. 3427 const FunctionType *getFunctionType() const; 3428 3429 /// hasBlockDeclRefExprs - Return true iff the block has BlockDeclRefExpr 3430 /// inside of the block that reference values outside the block. 3431 bool hasBlockDeclRefExprs() const { return HasBlockDeclRefExprs; } 3432 void setHasBlockDeclRefExprs(bool BDRE) { HasBlockDeclRefExprs = BDRE; } 3433 3434 static bool classof(const Stmt *T) { 3435 return T->getStmtClass() == BlockExprClass; 3436 } 3437 static bool classof(const BlockExpr *) { return true; } 3438 3439 // Iterators 3440 virtual child_iterator child_begin(); 3441 virtual child_iterator child_end(); 3442}; 3443 3444/// BlockDeclRefExpr - A reference to a declared variable, function, 3445/// enum, etc. 3446class BlockDeclRefExpr : public Expr { 3447 ValueDecl *D; 3448 SourceLocation Loc; 3449 bool IsByRef : 1; 3450 bool ConstQualAdded : 1; 3451 Stmt *CopyConstructorVal; 3452public: 3453 // FIXME: Fix type/value dependence! 3454 BlockDeclRefExpr(ValueDecl *d, QualType t, SourceLocation l, bool ByRef, 3455 bool constAdded = false, 3456 Stmt *copyConstructorVal = 0) 3457 : Expr(BlockDeclRefExprClass, t, (!t.isNull() && t->isDependentType()),false), 3458 D(d), Loc(l), IsByRef(ByRef), 3459 ConstQualAdded(constAdded), CopyConstructorVal(copyConstructorVal) {} 3460 3461 // \brief Build an empty reference to a declared variable in a 3462 // block. 3463 explicit BlockDeclRefExpr(EmptyShell Empty) 3464 : Expr(BlockDeclRefExprClass, Empty) { } 3465 3466 ValueDecl *getDecl() { return D; } 3467 const ValueDecl *getDecl() const { return D; } 3468 void setDecl(ValueDecl *VD) { D = VD; } 3469 3470 SourceLocation getLocation() const { return Loc; } 3471 void setLocation(SourceLocation L) { Loc = L; } 3472 3473 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 3474 3475 bool isByRef() const { return IsByRef; } 3476 void setByRef(bool BR) { IsByRef = BR; } 3477 3478 bool isConstQualAdded() const { return ConstQualAdded; } 3479 void setConstQualAdded(bool C) { ConstQualAdded = C; } 3480 3481 const Expr *getCopyConstructorExpr() const 3482 { return cast_or_null<Expr>(CopyConstructorVal); } 3483 Expr *getCopyConstructorExpr() 3484 { return cast_or_null<Expr>(CopyConstructorVal); } 3485 void setCopyConstructorExpr(Expr *E) { CopyConstructorVal = E; } 3486 3487 static bool classof(const Stmt *T) { 3488 return T->getStmtClass() == BlockDeclRefExprClass; 3489 } 3490 static bool classof(const BlockDeclRefExpr *) { return true; } 3491 3492 // Iterators 3493 virtual child_iterator child_begin(); 3494 virtual child_iterator child_end(); 3495}; 3496 3497} // end namespace clang 3498 3499#endif 3500