Expr.h revision 369e51fa400aeb5835bb9af4634ea516c11429a7
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 /// \brief Increases the reference count for this expression. 81 /// 82 /// Invoke the Retain() operation when this expression 83 /// is being shared by another owner. 84 Expr *Retain() { 85 Stmt::Retain(); 86 return this; 87 } 88 89 QualType getType() const { return TR; } 90 void setType(QualType t) { 91 // In C++, the type of an expression is always adjusted so that it 92 // will not have reference type an expression will never have 93 // reference type (C++ [expr]p6). Use 94 // QualType::getNonReferenceType() to retrieve the non-reference 95 // type. Additionally, inspect Expr::isLvalue to determine whether 96 // an expression that is adjusted in this manner should be 97 // considered an lvalue. 98 assert((t.isNull() || !t->isReferenceType()) && 99 "Expressions can't have reference type"); 100 101 TR = t; 102 } 103 104 /// isValueDependent - Determines whether this expression is 105 /// value-dependent (C++ [temp.dep.constexpr]). For example, the 106 /// array bound of "Chars" in the following example is 107 /// value-dependent. 108 /// @code 109 /// template<int Size, char (&Chars)[Size]> struct meta_string; 110 /// @endcode 111 bool isValueDependent() const { return ValueDependent; } 112 113 /// \brief Set whether this expression is value-dependent or not. 114 void setValueDependent(bool VD) { ValueDependent = VD; } 115 116 /// isTypeDependent - Determines whether this expression is 117 /// type-dependent (C++ [temp.dep.expr]), which means that its type 118 /// could change from one template instantiation to the next. For 119 /// example, the expressions "x" and "x + y" are type-dependent in 120 /// the following code, but "y" is not type-dependent: 121 /// @code 122 /// template<typename T> 123 /// void add(T x, int y) { 124 /// x + y; 125 /// } 126 /// @endcode 127 bool isTypeDependent() const { return TypeDependent; } 128 129 /// \brief Set whether this expression is type-dependent or not. 130 void setTypeDependent(bool TD) { TypeDependent = TD; } 131 132 /// SourceLocation tokens are not useful in isolation - they are low level 133 /// value objects created/interpreted by SourceManager. We assume AST 134 /// clients will have a pointer to the respective SourceManager. 135 virtual SourceRange getSourceRange() const = 0; 136 137 /// getExprLoc - Return the preferred location for the arrow when diagnosing 138 /// a problem with a generic expression. 139 virtual SourceLocation getExprLoc() const { return getLocStart(); } 140 141 /// isUnusedResultAWarning - Return true if this immediate expression should 142 /// be warned about if the result is unused. If so, fill in Loc and Ranges 143 /// with location to warn on and the source range[s] to report with the 144 /// warning. 145 bool isUnusedResultAWarning(SourceLocation &Loc, SourceRange &R1, 146 SourceRange &R2, ASTContext &Ctx) const; 147 148 /// isLvalue - C99 6.3.2.1: an lvalue is an expression with an object type or 149 /// incomplete type other than void. Nonarray expressions that can be lvalues: 150 /// - name, where name must be a variable 151 /// - e[i] 152 /// - (e), where e must be an lvalue 153 /// - e.name, where e must be an lvalue 154 /// - e->name 155 /// - *e, the type of e cannot be a function type 156 /// - string-constant 157 /// - reference type [C++ [expr]] 158 /// - b ? x : y, where x and y are lvalues of suitable types [C++] 159 /// 160 enum isLvalueResult { 161 LV_Valid, 162 LV_NotObjectType, 163 LV_IncompleteVoidType, 164 LV_DuplicateVectorComponents, 165 LV_InvalidExpression, 166 LV_MemberFunction, 167 LV_SubObjCPropertySetting, 168 LV_ClassTemporary 169 }; 170 isLvalueResult isLvalue(ASTContext &Ctx) const; 171 172 /// isModifiableLvalue - C99 6.3.2.1: an lvalue that does not have array type, 173 /// does not have an incomplete type, does not have a const-qualified type, 174 /// and if it is a structure or union, does not have any member (including, 175 /// recursively, any member or element of all contained aggregates or unions) 176 /// with a const-qualified type. 177 /// 178 /// \param Loc [in] [out] - A source location which *may* be filled 179 /// in with the location of the expression making this a 180 /// non-modifiable lvalue, if specified. 181 enum isModifiableLvalueResult { 182 MLV_Valid, 183 MLV_NotObjectType, 184 MLV_IncompleteVoidType, 185 MLV_DuplicateVectorComponents, 186 MLV_InvalidExpression, 187 MLV_LValueCast, // Specialized form of MLV_InvalidExpression. 188 MLV_IncompleteType, 189 MLV_ConstQualified, 190 MLV_ArrayType, 191 MLV_NotBlockQualified, 192 MLV_ReadonlyProperty, 193 MLV_NoSetterProperty, 194 MLV_MemberFunction, 195 MLV_SubObjCPropertySetting, 196 MLV_ClassTemporary 197 }; 198 isModifiableLvalueResult isModifiableLvalue(ASTContext &Ctx, 199 SourceLocation *Loc = 0) const; 200 201 /// \brief The return type of classify(). Represents the C++0x expression 202 /// taxonomy. 203 class Classification { 204 public: 205 /// \brief The various classification results. Most of these mean prvalue. 206 enum Kinds { 207 CL_LValue, 208 CL_XValue, 209 CL_Function, // Functions cannot be lvalues in C. 210 CL_Void, // Void cannot be an lvalue in C. 211 CL_DuplicateVectorComponents, // A vector shuffle with dupes. 212 CL_MemberFunction, // An expression referring to a member function 213 CL_SubObjCPropertySetting, 214 CL_ClassTemporary, // A prvalue of class type 215 CL_PRValue // A prvalue for any other reason, of any other type 216 }; 217 /// \brief The results of modification testing. 218 enum ModifiableType { 219 CM_Untested, // testModifiable was false. 220 CM_Modifiable, 221 CM_RValue, // Not modifiable because it's an rvalue 222 CM_Function, // Not modifiable because it's a function; C++ only 223 CM_LValueCast, // Same as CM_RValue, but indicates GCC cast-as-lvalue ext 224 CM_NotBlockQualified, // Not captured in the closure 225 CM_NoSetterProperty,// Implicit assignment to ObjC property without setter 226 CM_ConstQualified, 227 CM_ArrayType, 228 CM_IncompleteType 229 }; 230 231 private: 232 friend class Expr; 233 234 unsigned short Kind; 235 unsigned short Modifiable; 236 237 explicit Classification(Kinds k, ModifiableType m) 238 : Kind(k), Modifiable(m) 239 {} 240 241 public: 242 Classification() {} 243 244 Kinds getKind() const { return static_cast<Kinds>(Kind); } 245 ModifiableType getModifiable() const { 246 assert(Modifiable != CM_Untested && "Did not test for modifiability."); 247 return static_cast<ModifiableType>(Modifiable); 248 } 249 bool isLValue() const { return Kind == CL_LValue; } 250 bool isXValue() const { return Kind == CL_XValue; } 251 bool isGLValue() const { return Kind <= CL_XValue; } 252 bool isPRValue() const { return Kind >= CL_Function; } 253 bool isRValue() const { return Kind >= CL_XValue; } 254 bool isModifiable() const { return getModifiable() == CM_Modifiable; } 255 }; 256 /// \brief Classify - Classify this expression according to the C++0x 257 /// expression taxonomy. 258 /// 259 /// C++0x defines ([basic.lval]) a new taxonomy of expressions to replace the 260 /// old lvalue vs rvalue. This function determines the type of expression this 261 /// is. There are three expression types: 262 /// - lvalues are classical lvalues as in C++03. 263 /// - prvalues are equivalent to rvalues in C++03. 264 /// - xvalues are expressions yielding unnamed rvalue references, e.g. a 265 /// function returning an rvalue reference. 266 /// lvalues and xvalues are collectively referred to as glvalues, while 267 /// prvalues and xvalues together form rvalues. 268 Classification Classify(ASTContext &Ctx) const { 269 return ClassifyImpl(Ctx, 0); 270 } 271 272 /// \brief ClassifyModifiable - Classify this expression according to the 273 /// C++0x expression taxonomy, and see if it is valid on the left side 274 /// of an assignment. 275 /// 276 /// This function extends classify in that it also tests whether the 277 /// expression is modifiable (C99 6.3.2.1p1). 278 /// \param Loc A source location that might be filled with a relevant location 279 /// if the expression is not modifiable. 280 Classification ClassifyModifiable(ASTContext &Ctx, SourceLocation &Loc) const{ 281 return ClassifyImpl(Ctx, &Loc); 282 } 283 284private: 285 Classification ClassifyImpl(ASTContext &Ctx, SourceLocation *Loc) const; 286 287public: 288 289 /// \brief If this expression refers to a bit-field, retrieve the 290 /// declaration of that bit-field. 291 FieldDecl *getBitField(); 292 293 const FieldDecl *getBitField() const { 294 return const_cast<Expr*>(this)->getBitField(); 295 } 296 297 /// \brief Returns whether this expression refers to a vector element. 298 bool refersToVectorElement() const; 299 300 /// isKnownToHaveBooleanValue - Return true if this is an integer expression 301 /// that is known to return 0 or 1. This happens for _Bool/bool expressions 302 /// but also int expressions which are produced by things like comparisons in 303 /// C. 304 bool isKnownToHaveBooleanValue() const; 305 306 /// isIntegerConstantExpr - Return true if this expression is a valid integer 307 /// constant expression, and, if so, return its value in Result. If not a 308 /// valid i-c-e, return false and fill in Loc (if specified) with the location 309 /// of the invalid expression. 310 bool isIntegerConstantExpr(llvm::APSInt &Result, ASTContext &Ctx, 311 SourceLocation *Loc = 0, 312 bool isEvaluated = true) const; 313 bool isIntegerConstantExpr(ASTContext &Ctx, SourceLocation *Loc = 0) const { 314 llvm::APSInt X; 315 return isIntegerConstantExpr(X, Ctx, Loc); 316 } 317 /// isConstantInitializer - Returns true if this expression is a constant 318 /// initializer, which can be emitted at compile-time. 319 bool isConstantInitializer(ASTContext &Ctx, bool ForRef) const; 320 321 /// EvalResult is a struct with detailed info about an evaluated expression. 322 struct EvalResult { 323 /// Val - This is the value the expression can be folded to. 324 APValue Val; 325 326 /// HasSideEffects - Whether the evaluated expression has side effects. 327 /// For example, (f() && 0) can be folded, but it still has side effects. 328 bool HasSideEffects; 329 330 /// Diag - If the expression is unfoldable, then Diag contains a note 331 /// diagnostic indicating why it's not foldable. DiagLoc indicates a caret 332 /// position for the error, and DiagExpr is the expression that caused 333 /// the error. 334 /// If the expression is foldable, but not an integer constant expression, 335 /// Diag contains a note diagnostic that describes why it isn't an integer 336 /// constant expression. If the expression *is* an integer constant 337 /// expression, then Diag will be zero. 338 unsigned Diag; 339 const Expr *DiagExpr; 340 SourceLocation DiagLoc; 341 342 EvalResult() : HasSideEffects(false), Diag(0), DiagExpr(0) {} 343 344 // isGlobalLValue - Return true if the evaluated lvalue expression 345 // is global. 346 bool isGlobalLValue() const; 347 // hasSideEffects - Return true if the evaluated expression has 348 // side effects. 349 bool hasSideEffects() const { 350 return HasSideEffects; 351 } 352 }; 353 354 /// Evaluate - Return true if this is a constant which we can fold using 355 /// any crazy technique (that has nothing to do with language standards) that 356 /// we want to. If this function returns true, it returns the folded constant 357 /// in Result. 358 bool Evaluate(EvalResult &Result, ASTContext &Ctx) const; 359 360 /// EvaluateAsBooleanCondition - Return true if this is a constant 361 /// which we we can fold and convert to a boolean condition using 362 /// any crazy technique that we want to. 363 bool EvaluateAsBooleanCondition(bool &Result, ASTContext &Ctx) const; 364 365 /// isEvaluatable - Call Evaluate to see if this expression can be constant 366 /// folded, but discard the result. 367 bool isEvaluatable(ASTContext &Ctx) const; 368 369 /// HasSideEffects - This routine returns true for all those expressions 370 /// which must be evaluated each time and must not be optimization away 371 /// or evaluated at compile time. Example is a function call, volatile 372 /// variable read. 373 bool HasSideEffects(ASTContext &Ctx) const; 374 375 /// EvaluateAsInt - Call Evaluate and return the folded integer. This 376 /// must be called on an expression that constant folds to an integer. 377 llvm::APSInt EvaluateAsInt(ASTContext &Ctx) const; 378 379 /// EvaluateAsLValue - Evaluate an expression to see if it's a lvalue 380 /// with link time known address. 381 bool EvaluateAsLValue(EvalResult &Result, ASTContext &Ctx) const; 382 383 /// EvaluateAsLValue - Evaluate an expression to see if it's a lvalue. 384 bool EvaluateAsAnyLValue(EvalResult &Result, ASTContext &Ctx) const; 385 386 /// \brief Enumeration used to describe how \c isNullPointerConstant() 387 /// should cope with value-dependent expressions. 388 enum NullPointerConstantValueDependence { 389 /// \brief Specifies that the expression should never be value-dependent. 390 NPC_NeverValueDependent = 0, 391 392 /// \brief Specifies that a value-dependent expression of integral or 393 /// dependent type should be considered a null pointer constant. 394 NPC_ValueDependentIsNull, 395 396 /// \brief Specifies that a value-dependent expression should be considered 397 /// to never be a null pointer constant. 398 NPC_ValueDependentIsNotNull 399 }; 400 401 /// isNullPointerConstant - C99 6.3.2.3p3 - Return true if this is either an 402 /// integer constant expression with the value zero, or if this is one that is 403 /// cast to void*. 404 bool isNullPointerConstant(ASTContext &Ctx, 405 NullPointerConstantValueDependence NPC) const; 406 407 /// isOBJCGCCandidate - Return true if this expression may be used in a read/ 408 /// write barrier. 409 bool isOBJCGCCandidate(ASTContext &Ctx) const; 410 411 /// \brief Result type of CanThrow(). 412 enum CanThrowResult { 413 CT_Cannot, 414 CT_Dependent, 415 CT_Can 416 }; 417 /// \brief Test if this expression, if evaluated, might throw, according to 418 /// the rules of C++ [expr.unary.noexcept]. 419 CanThrowResult CanThrow(ASTContext &C) const; 420 421 /// IgnoreParens - Ignore parentheses. If this Expr is a ParenExpr, return 422 /// its subexpression. If that subexpression is also a ParenExpr, 423 /// then this method recursively returns its subexpression, and so forth. 424 /// Otherwise, the method returns the current Expr. 425 Expr *IgnoreParens(); 426 427 /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr 428 /// or CastExprs, returning their operand. 429 Expr *IgnoreParenCasts(); 430 431 /// IgnoreParenImpCasts - Ignore parentheses and implicit casts. Strip off any 432 /// ParenExpr or ImplicitCastExprs, returning their operand. 433 Expr *IgnoreParenImpCasts(); 434 435 const Expr *IgnoreParenImpCasts() const { 436 return const_cast<Expr*>(this)->IgnoreParenImpCasts(); 437 } 438 439 /// IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the 440 /// value (including ptr->int casts of the same size). Strip off any 441 /// ParenExpr or CastExprs, returning their operand. 442 Expr *IgnoreParenNoopCasts(ASTContext &Ctx); 443 444 /// \brief Determine whether this expression is a default function argument. 445 /// 446 /// Default arguments are implicitly generated in the abstract syntax tree 447 /// by semantic analysis for function calls, object constructions, etc. in 448 /// C++. Default arguments are represented by \c CXXDefaultArgExpr nodes; 449 /// this routine also looks through any implicit casts to determine whether 450 /// the expression is a default argument. 451 bool isDefaultArgument() const; 452 453 /// \brief Determine whether this expression directly creates a 454 /// temporary object (of class type). 455 bool isTemporaryObject() const { return getTemporaryObject() != 0; } 456 457 /// \brief If this expression directly creates a temporary object of 458 /// class type, return the expression that actually constructs that 459 /// temporary object. 460 const Expr *getTemporaryObject() const; 461 462 const Expr *IgnoreParens() const { 463 return const_cast<Expr*>(this)->IgnoreParens(); 464 } 465 const Expr *IgnoreParenCasts() const { 466 return const_cast<Expr*>(this)->IgnoreParenCasts(); 467 } 468 const Expr *IgnoreParenNoopCasts(ASTContext &Ctx) const { 469 return const_cast<Expr*>(this)->IgnoreParenNoopCasts(Ctx); 470 } 471 472 static bool hasAnyTypeDependentArguments(Expr** Exprs, unsigned NumExprs); 473 static bool hasAnyValueDependentArguments(Expr** Exprs, unsigned NumExprs); 474 475 static bool classof(const Stmt *T) { 476 return T->getStmtClass() >= firstExprConstant && 477 T->getStmtClass() <= lastExprConstant; 478 } 479 static bool classof(const Expr *) { return true; } 480}; 481 482 483//===----------------------------------------------------------------------===// 484// Primary Expressions. 485//===----------------------------------------------------------------------===// 486 487/// \brief Represents the qualifier that may precede a C++ name, e.g., the 488/// "std::" in "std::sort". 489struct NameQualifier { 490 /// \brief The nested name specifier. 491 NestedNameSpecifier *NNS; 492 493 /// \brief The source range covered by the nested name specifier. 494 SourceRange Range; 495}; 496 497/// \brief Represents an explicit template argument list in C++, e.g., 498/// the "<int>" in "sort<int>". 499struct ExplicitTemplateArgumentList { 500 /// \brief The source location of the left angle bracket ('<'); 501 SourceLocation LAngleLoc; 502 503 /// \brief The source location of the right angle bracket ('>'); 504 SourceLocation RAngleLoc; 505 506 /// \brief The number of template arguments in TemplateArgs. 507 /// The actual template arguments (if any) are stored after the 508 /// ExplicitTemplateArgumentList structure. 509 unsigned NumTemplateArgs; 510 511 /// \brief Retrieve the template arguments 512 TemplateArgumentLoc *getTemplateArgs() { 513 return reinterpret_cast<TemplateArgumentLoc *> (this + 1); 514 } 515 516 /// \brief Retrieve the template arguments 517 const TemplateArgumentLoc *getTemplateArgs() const { 518 return reinterpret_cast<const TemplateArgumentLoc *> (this + 1); 519 } 520 521 void initializeFrom(const TemplateArgumentListInfo &List); 522 void copyInto(TemplateArgumentListInfo &List) const; 523 static std::size_t sizeFor(unsigned NumTemplateArgs); 524 static std::size_t sizeFor(const TemplateArgumentListInfo &List); 525}; 526 527/// DeclRefExpr - [C99 6.5.1p2] - A reference to a declared variable, function, 528/// enum, etc. 529class DeclRefExpr : public Expr { 530 enum { 531 // Flag on DecoratedD that specifies when this declaration reference 532 // expression has a C++ nested-name-specifier. 533 HasQualifierFlag = 0x01, 534 // Flag on DecoratedD that specifies when this declaration reference 535 // expression has an explicit C++ template argument list. 536 HasExplicitTemplateArgumentListFlag = 0x02 537 }; 538 539 // DecoratedD - The declaration that we are referencing, plus two bits to 540 // indicate whether (1) the declaration's name was explicitly qualified and 541 // (2) the declaration's name was followed by an explicit template 542 // argument list. 543 llvm::PointerIntPair<ValueDecl *, 2> DecoratedD; 544 545 // Loc - The location of the declaration name itself. 546 SourceLocation Loc; 547 548 /// DNLoc - Provides source/type location info for the 549 /// declaration name embedded in DecoratedD. 550 DeclarationNameLoc DNLoc; 551 552 /// \brief Retrieve the qualifier that preceded the declaration name, if any. 553 NameQualifier *getNameQualifier() { 554 if ((DecoratedD.getInt() & HasQualifierFlag) == 0) 555 return 0; 556 557 return reinterpret_cast<NameQualifier *> (this + 1); 558 } 559 560 /// \brief Retrieve the qualifier that preceded the member name, if any. 561 const NameQualifier *getNameQualifier() const { 562 return const_cast<DeclRefExpr *>(this)->getNameQualifier(); 563 } 564 565 DeclRefExpr(NestedNameSpecifier *Qualifier, SourceRange QualifierRange, 566 ValueDecl *D, SourceLocation NameLoc, 567 const TemplateArgumentListInfo *TemplateArgs, 568 QualType T); 569 570 DeclRefExpr(NestedNameSpecifier *Qualifier, SourceRange QualifierRange, 571 ValueDecl *D, const DeclarationNameInfo &NameInfo, 572 const TemplateArgumentListInfo *TemplateArgs, 573 QualType T); 574 575 /// \brief Construct an empty declaration reference expression. 576 explicit DeclRefExpr(EmptyShell Empty) 577 : Expr(DeclRefExprClass, Empty) { } 578 579 /// \brief Computes the type- and value-dependence flags for this 580 /// declaration reference expression. 581 void computeDependence(); 582 583public: 584 DeclRefExpr(ValueDecl *d, QualType t, SourceLocation l) : 585 Expr(DeclRefExprClass, t, false, false), DecoratedD(d, 0), Loc(l) { 586 computeDependence(); 587 } 588 589 static DeclRefExpr *Create(ASTContext &Context, 590 NestedNameSpecifier *Qualifier, 591 SourceRange QualifierRange, 592 ValueDecl *D, 593 SourceLocation NameLoc, 594 QualType T, 595 const TemplateArgumentListInfo *TemplateArgs = 0); 596 597 static DeclRefExpr *Create(ASTContext &Context, 598 NestedNameSpecifier *Qualifier, 599 SourceRange QualifierRange, 600 ValueDecl *D, 601 const DeclarationNameInfo &NameInfo, 602 QualType T, 603 const TemplateArgumentListInfo *TemplateArgs = 0); 604 605 /// \brief Construct an empty declaration reference expression. 606 static DeclRefExpr *CreateEmpty(ASTContext &Context, 607 bool HasQualifier, unsigned NumTemplateArgs); 608 609 ValueDecl *getDecl() { return DecoratedD.getPointer(); } 610 const ValueDecl *getDecl() const { return DecoratedD.getPointer(); } 611 void setDecl(ValueDecl *NewD) { DecoratedD.setPointer(NewD); } 612 613 DeclarationNameInfo getNameInfo() const { 614 return DeclarationNameInfo(getDecl()->getDeclName(), Loc, DNLoc); 615 } 616 617 SourceLocation getLocation() const { return Loc; } 618 void setLocation(SourceLocation L) { Loc = L; } 619 virtual SourceRange getSourceRange() const; 620 621 /// \brief Determine whether this declaration reference was preceded by a 622 /// C++ nested-name-specifier, e.g., \c N::foo. 623 bool hasQualifier() const { return DecoratedD.getInt() & HasQualifierFlag; } 624 625 /// \brief If the name was qualified, retrieves the source range of 626 /// the nested-name-specifier that precedes the name. Otherwise, 627 /// returns an empty source range. 628 SourceRange getQualifierRange() const { 629 if (!hasQualifier()) 630 return SourceRange(); 631 632 return getNameQualifier()->Range; 633 } 634 635 /// \brief If the name was qualified, retrieves the nested-name-specifier 636 /// that precedes the name. Otherwise, returns NULL. 637 NestedNameSpecifier *getQualifier() const { 638 if (!hasQualifier()) 639 return 0; 640 641 return getNameQualifier()->NNS; 642 } 643 644 bool hasExplicitTemplateArgs() const { 645 return (DecoratedD.getInt() & HasExplicitTemplateArgumentListFlag); 646 } 647 648 /// \brief Retrieve the explicit template argument list that followed the 649 /// member template name. 650 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 651 assert(hasExplicitTemplateArgs()); 652 653 if ((DecoratedD.getInt() & HasQualifierFlag) == 0) 654 return *reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 655 656 return *reinterpret_cast<ExplicitTemplateArgumentList *>( 657 getNameQualifier() + 1); 658 } 659 660 /// \brief Retrieve the explicit template argument list that followed the 661 /// member template name. 662 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 663 return const_cast<DeclRefExpr *>(this)->getExplicitTemplateArgs(); 664 } 665 666 /// \brief Retrieves the optional explicit template arguments. 667 /// This points to the same data as getExplicitTemplateArgs(), but 668 /// returns null if there are no explicit template arguments. 669 const ExplicitTemplateArgumentList *getExplicitTemplateArgsOpt() const { 670 if (!hasExplicitTemplateArgs()) return 0; 671 return &getExplicitTemplateArgs(); 672 } 673 674 /// \brief Copies the template arguments (if present) into the given 675 /// structure. 676 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 677 if (hasExplicitTemplateArgs()) 678 getExplicitTemplateArgs().copyInto(List); 679 } 680 681 /// \brief Retrieve the location of the left angle bracket following the 682 /// member name ('<'), if any. 683 SourceLocation getLAngleLoc() const { 684 if (!hasExplicitTemplateArgs()) 685 return SourceLocation(); 686 687 return getExplicitTemplateArgs().LAngleLoc; 688 } 689 690 /// \brief Retrieve the template arguments provided as part of this 691 /// template-id. 692 const TemplateArgumentLoc *getTemplateArgs() const { 693 if (!hasExplicitTemplateArgs()) 694 return 0; 695 696 return getExplicitTemplateArgs().getTemplateArgs(); 697 } 698 699 /// \brief Retrieve the number of template arguments provided as part of this 700 /// template-id. 701 unsigned getNumTemplateArgs() const { 702 if (!hasExplicitTemplateArgs()) 703 return 0; 704 705 return getExplicitTemplateArgs().NumTemplateArgs; 706 } 707 708 /// \brief Retrieve the location of the right angle bracket following the 709 /// template arguments ('>'). 710 SourceLocation getRAngleLoc() const { 711 if (!hasExplicitTemplateArgs()) 712 return SourceLocation(); 713 714 return getExplicitTemplateArgs().RAngleLoc; 715 } 716 717 static bool classof(const Stmt *T) { 718 return T->getStmtClass() == DeclRefExprClass; 719 } 720 static bool classof(const DeclRefExpr *) { return true; } 721 722 // Iterators 723 virtual child_iterator child_begin(); 724 virtual child_iterator child_end(); 725 726 friend class ASTStmtReader; 727 friend class ASTStmtWriter; 728}; 729 730/// PredefinedExpr - [C99 6.4.2.2] - A predefined identifier such as __func__. 731class PredefinedExpr : public Expr { 732public: 733 enum IdentType { 734 Func, 735 Function, 736 PrettyFunction, 737 /// PrettyFunctionNoVirtual - The same as PrettyFunction, except that the 738 /// 'virtual' keyword is omitted for virtual member functions. 739 PrettyFunctionNoVirtual 740 }; 741 742private: 743 SourceLocation Loc; 744 IdentType Type; 745public: 746 PredefinedExpr(SourceLocation l, QualType type, IdentType IT) 747 : Expr(PredefinedExprClass, type, type->isDependentType(), 748 type->isDependentType()), Loc(l), Type(IT) {} 749 750 /// \brief Construct an empty predefined expression. 751 explicit PredefinedExpr(EmptyShell Empty) 752 : Expr(PredefinedExprClass, Empty) { } 753 754 IdentType getIdentType() const { return Type; } 755 void setIdentType(IdentType IT) { Type = IT; } 756 757 SourceLocation getLocation() const { return Loc; } 758 void setLocation(SourceLocation L) { Loc = L; } 759 760 static std::string ComputeName(IdentType IT, const Decl *CurrentDecl); 761 762 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 763 764 static bool classof(const Stmt *T) { 765 return T->getStmtClass() == PredefinedExprClass; 766 } 767 static bool classof(const PredefinedExpr *) { return true; } 768 769 // Iterators 770 virtual child_iterator child_begin(); 771 virtual child_iterator child_end(); 772}; 773 774/// \brief Used by IntegerLiteral/FloatingLiteral to store the numeric without 775/// leaking memory. 776/// 777/// For large floats/integers, APFloat/APInt will allocate memory from the heap 778/// to represent these numbers. Unfortunately, when we use a BumpPtrAllocator 779/// to allocate IntegerLiteral/FloatingLiteral nodes the memory associated with 780/// the APFloat/APInt values will never get freed. APNumericStorage uses 781/// ASTContext's allocator for memory allocation. 782class APNumericStorage { 783 unsigned BitWidth; 784 union { 785 uint64_t VAL; ///< Used to store the <= 64 bits integer value. 786 uint64_t *pVal; ///< Used to store the >64 bits integer value. 787 }; 788 789 bool hasAllocation() const { return llvm::APInt::getNumWords(BitWidth) > 1; } 790 791 APNumericStorage(const APNumericStorage&); // do not implement 792 APNumericStorage& operator=(const APNumericStorage&); // do not implement 793 794protected: 795 APNumericStorage() : BitWidth(0), VAL(0) { } 796 797 llvm::APInt getIntValue() const { 798 unsigned NumWords = llvm::APInt::getNumWords(BitWidth); 799 if (NumWords > 1) 800 return llvm::APInt(BitWidth, NumWords, pVal); 801 else 802 return llvm::APInt(BitWidth, VAL); 803 } 804 void setIntValue(ASTContext &C, const llvm::APInt &Val); 805}; 806 807class APIntStorage : public APNumericStorage { 808public: 809 llvm::APInt getValue() const { return getIntValue(); } 810 void setValue(ASTContext &C, const llvm::APInt &Val) { setIntValue(C, Val); } 811}; 812 813class APFloatStorage : public APNumericStorage { 814public: 815 llvm::APFloat getValue() const { return llvm::APFloat(getIntValue()); } 816 void setValue(ASTContext &C, const llvm::APFloat &Val) { 817 setIntValue(C, Val.bitcastToAPInt()); 818 } 819}; 820 821class IntegerLiteral : public Expr { 822 APIntStorage Num; 823 SourceLocation Loc; 824 825 /// \brief Construct an empty integer literal. 826 explicit IntegerLiteral(EmptyShell Empty) 827 : Expr(IntegerLiteralClass, Empty) { } 828 829public: 830 // type should be IntTy, LongTy, LongLongTy, UnsignedIntTy, UnsignedLongTy, 831 // or UnsignedLongLongTy 832 IntegerLiteral(ASTContext &C, const llvm::APInt &V, 833 QualType type, SourceLocation l) 834 : Expr(IntegerLiteralClass, type, false, false), Loc(l) { 835 assert(type->isIntegerType() && "Illegal type in IntegerLiteral"); 836 setValue(C, V); 837 } 838 839 // type should be IntTy, LongTy, LongLongTy, UnsignedIntTy, UnsignedLongTy, 840 // or UnsignedLongLongTy 841 static IntegerLiteral *Create(ASTContext &C, const llvm::APInt &V, 842 QualType type, SourceLocation l); 843 static IntegerLiteral *Create(ASTContext &C, EmptyShell Empty); 844 845 llvm::APInt getValue() const { return Num.getValue(); } 846 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 847 848 /// \brief Retrieve the location of the literal. 849 SourceLocation getLocation() const { return Loc; } 850 851 void setValue(ASTContext &C, const llvm::APInt &Val) { Num.setValue(C, Val); } 852 void setLocation(SourceLocation Location) { Loc = Location; } 853 854 static bool classof(const Stmt *T) { 855 return T->getStmtClass() == IntegerLiteralClass; 856 } 857 static bool classof(const IntegerLiteral *) { return true; } 858 859 // Iterators 860 virtual child_iterator child_begin(); 861 virtual child_iterator child_end(); 862}; 863 864class CharacterLiteral : public Expr { 865 unsigned Value; 866 SourceLocation Loc; 867 bool IsWide; 868public: 869 // type should be IntTy 870 CharacterLiteral(unsigned value, bool iswide, QualType type, SourceLocation l) 871 : Expr(CharacterLiteralClass, type, false, false), Value(value), Loc(l), 872 IsWide(iswide) { 873 } 874 875 /// \brief Construct an empty character literal. 876 CharacterLiteral(EmptyShell Empty) : Expr(CharacterLiteralClass, Empty) { } 877 878 SourceLocation getLocation() const { return Loc; } 879 bool isWide() const { return IsWide; } 880 881 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 882 883 unsigned getValue() const { return Value; } 884 885 void setLocation(SourceLocation Location) { Loc = Location; } 886 void setWide(bool W) { IsWide = W; } 887 void setValue(unsigned Val) { Value = Val; } 888 889 static bool classof(const Stmt *T) { 890 return T->getStmtClass() == CharacterLiteralClass; 891 } 892 static bool classof(const CharacterLiteral *) { return true; } 893 894 // Iterators 895 virtual child_iterator child_begin(); 896 virtual child_iterator child_end(); 897}; 898 899class FloatingLiteral : public Expr { 900 APFloatStorage Num; 901 bool IsExact : 1; 902 SourceLocation Loc; 903 904 FloatingLiteral(ASTContext &C, const llvm::APFloat &V, bool isexact, 905 QualType Type, SourceLocation L) 906 : Expr(FloatingLiteralClass, Type, false, false), 907 IsExact(isexact), Loc(L) { 908 setValue(C, V); 909 } 910 911 /// \brief Construct an empty floating-point literal. 912 explicit FloatingLiteral(EmptyShell Empty) 913 : Expr(FloatingLiteralClass, Empty), IsExact(false) { } 914 915public: 916 static FloatingLiteral *Create(ASTContext &C, const llvm::APFloat &V, 917 bool isexact, QualType Type, SourceLocation L); 918 static FloatingLiteral *Create(ASTContext &C, EmptyShell Empty); 919 920 llvm::APFloat getValue() const { return Num.getValue(); } 921 void setValue(ASTContext &C, const llvm::APFloat &Val) { 922 Num.setValue(C, Val); 923 } 924 925 bool isExact() const { return IsExact; } 926 void setExact(bool E) { IsExact = E; } 927 928 /// getValueAsApproximateDouble - This returns the value as an inaccurate 929 /// double. Note that this may cause loss of precision, but is useful for 930 /// debugging dumps, etc. 931 double getValueAsApproximateDouble() const; 932 933 SourceLocation getLocation() const { return Loc; } 934 void setLocation(SourceLocation L) { Loc = L; } 935 936 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 937 938 static bool classof(const Stmt *T) { 939 return T->getStmtClass() == FloatingLiteralClass; 940 } 941 static bool classof(const FloatingLiteral *) { return true; } 942 943 // Iterators 944 virtual child_iterator child_begin(); 945 virtual child_iterator child_end(); 946}; 947 948/// ImaginaryLiteral - We support imaginary integer and floating point literals, 949/// like "1.0i". We represent these as a wrapper around FloatingLiteral and 950/// IntegerLiteral classes. Instances of this class always have a Complex type 951/// whose element type matches the subexpression. 952/// 953class ImaginaryLiteral : public Expr { 954 Stmt *Val; 955public: 956 ImaginaryLiteral(Expr *val, QualType Ty) 957 : Expr(ImaginaryLiteralClass, Ty, false, false), Val(val) {} 958 959 /// \brief Build an empty imaginary literal. 960 explicit ImaginaryLiteral(EmptyShell Empty) 961 : Expr(ImaginaryLiteralClass, Empty) { } 962 963 const Expr *getSubExpr() const { return cast<Expr>(Val); } 964 Expr *getSubExpr() { return cast<Expr>(Val); } 965 void setSubExpr(Expr *E) { Val = E; } 966 967 virtual SourceRange getSourceRange() const { return Val->getSourceRange(); } 968 static bool classof(const Stmt *T) { 969 return T->getStmtClass() == ImaginaryLiteralClass; 970 } 971 static bool classof(const ImaginaryLiteral *) { return true; } 972 973 // Iterators 974 virtual child_iterator child_begin(); 975 virtual child_iterator child_end(); 976}; 977 978/// StringLiteral - This represents a string literal expression, e.g. "foo" 979/// or L"bar" (wide strings). The actual string is returned by getStrData() 980/// is NOT null-terminated, and the length of the string is determined by 981/// calling getByteLength(). The C type for a string is always a 982/// ConstantArrayType. In C++, the char type is const qualified, in C it is 983/// not. 984/// 985/// Note that strings in C can be formed by concatenation of multiple string 986/// literal pptokens in translation phase #6. This keeps track of the locations 987/// of each of these pieces. 988/// 989/// Strings in C can also be truncated and extended by assigning into arrays, 990/// e.g. with constructs like: 991/// char X[2] = "foobar"; 992/// In this case, getByteLength() will return 6, but the string literal will 993/// have type "char[2]". 994class StringLiteral : public Expr { 995 const char *StrData; 996 unsigned ByteLength; 997 bool IsWide; 998 unsigned NumConcatenated; 999 SourceLocation TokLocs[1]; 1000 1001 StringLiteral(QualType Ty) : Expr(StringLiteralClass, Ty, false, false) {} 1002 1003public: 1004 /// This is the "fully general" constructor that allows representation of 1005 /// strings formed from multiple concatenated tokens. 1006 static StringLiteral *Create(ASTContext &C, const char *StrData, 1007 unsigned ByteLength, bool Wide, QualType Ty, 1008 const SourceLocation *Loc, unsigned NumStrs); 1009 1010 /// Simple constructor for string literals made from one token. 1011 static StringLiteral *Create(ASTContext &C, const char *StrData, 1012 unsigned ByteLength, 1013 bool Wide, QualType Ty, SourceLocation Loc) { 1014 return Create(C, StrData, ByteLength, Wide, Ty, &Loc, 1); 1015 } 1016 1017 /// \brief Construct an empty string literal. 1018 static StringLiteral *CreateEmpty(ASTContext &C, unsigned NumStrs); 1019 1020 llvm::StringRef getString() const { 1021 return llvm::StringRef(StrData, ByteLength); 1022 } 1023 1024 unsigned getByteLength() const { return ByteLength; } 1025 1026 /// \brief Sets the string data to the given string data. 1027 void setString(ASTContext &C, llvm::StringRef Str); 1028 1029 bool isWide() const { return IsWide; } 1030 void setWide(bool W) { IsWide = W; } 1031 1032 bool containsNonAsciiOrNull() const { 1033 llvm::StringRef Str = getString(); 1034 for (unsigned i = 0, e = Str.size(); i != e; ++i) 1035 if (!isascii(Str[i]) || !Str[i]) 1036 return true; 1037 return false; 1038 } 1039 /// getNumConcatenated - Get the number of string literal tokens that were 1040 /// concatenated in translation phase #6 to form this string literal. 1041 unsigned getNumConcatenated() const { return NumConcatenated; } 1042 1043 SourceLocation getStrTokenLoc(unsigned TokNum) const { 1044 assert(TokNum < NumConcatenated && "Invalid tok number"); 1045 return TokLocs[TokNum]; 1046 } 1047 void setStrTokenLoc(unsigned TokNum, SourceLocation L) { 1048 assert(TokNum < NumConcatenated && "Invalid tok number"); 1049 TokLocs[TokNum] = L; 1050 } 1051 1052 typedef const SourceLocation *tokloc_iterator; 1053 tokloc_iterator tokloc_begin() const { return TokLocs; } 1054 tokloc_iterator tokloc_end() const { return TokLocs+NumConcatenated; } 1055 1056 virtual SourceRange getSourceRange() const { 1057 return SourceRange(TokLocs[0], TokLocs[NumConcatenated-1]); 1058 } 1059 static bool classof(const Stmt *T) { 1060 return T->getStmtClass() == StringLiteralClass; 1061 } 1062 static bool classof(const StringLiteral *) { return true; } 1063 1064 // Iterators 1065 virtual child_iterator child_begin(); 1066 virtual child_iterator child_end(); 1067}; 1068 1069/// ParenExpr - This represents a parethesized expression, e.g. "(1)". This 1070/// AST node is only formed if full location information is requested. 1071class ParenExpr : public Expr { 1072 SourceLocation L, R; 1073 Stmt *Val; 1074public: 1075 ParenExpr(SourceLocation l, SourceLocation r, Expr *val) 1076 : Expr(ParenExprClass, val->getType(), 1077 val->isTypeDependent(), val->isValueDependent()), 1078 L(l), R(r), Val(val) {} 1079 1080 /// \brief Construct an empty parenthesized expression. 1081 explicit ParenExpr(EmptyShell Empty) 1082 : Expr(ParenExprClass, Empty) { } 1083 1084 const Expr *getSubExpr() const { return cast<Expr>(Val); } 1085 Expr *getSubExpr() { return cast<Expr>(Val); } 1086 void setSubExpr(Expr *E) { Val = E; } 1087 1088 virtual SourceRange getSourceRange() const { return SourceRange(L, R); } 1089 1090 /// \brief Get the location of the left parentheses '('. 1091 SourceLocation getLParen() const { return L; } 1092 void setLParen(SourceLocation Loc) { L = Loc; } 1093 1094 /// \brief Get the location of the right parentheses ')'. 1095 SourceLocation getRParen() const { return R; } 1096 void setRParen(SourceLocation Loc) { R = Loc; } 1097 1098 static bool classof(const Stmt *T) { 1099 return T->getStmtClass() == ParenExprClass; 1100 } 1101 static bool classof(const ParenExpr *) { return true; } 1102 1103 // Iterators 1104 virtual child_iterator child_begin(); 1105 virtual child_iterator child_end(); 1106}; 1107 1108 1109/// UnaryOperator - This represents the unary-expression's (except sizeof and 1110/// alignof), the postinc/postdec operators from postfix-expression, and various 1111/// extensions. 1112/// 1113/// Notes on various nodes: 1114/// 1115/// Real/Imag - These return the real/imag part of a complex operand. If 1116/// applied to a non-complex value, the former returns its operand and the 1117/// later returns zero in the type of the operand. 1118/// 1119class UnaryOperator : public Expr { 1120public: 1121 typedef UnaryOperatorKind Opcode; 1122 1123private: 1124 unsigned Opc : 5; 1125 SourceLocation Loc; 1126 Stmt *Val; 1127public: 1128 1129 UnaryOperator(Expr *input, Opcode opc, QualType type, SourceLocation l) 1130 : Expr(UnaryOperatorClass, type, 1131 input->isTypeDependent() || type->isDependentType(), 1132 input->isValueDependent()), 1133 Opc(opc), Loc(l), Val(input) {} 1134 1135 /// \brief Build an empty unary operator. 1136 explicit UnaryOperator(EmptyShell Empty) 1137 : Expr(UnaryOperatorClass, Empty), Opc(UO_AddrOf) { } 1138 1139 Opcode getOpcode() const { return static_cast<Opcode>(Opc); } 1140 void setOpcode(Opcode O) { Opc = O; } 1141 1142 Expr *getSubExpr() const { return cast<Expr>(Val); } 1143 void setSubExpr(Expr *E) { Val = E; } 1144 1145 /// getOperatorLoc - Return the location of the operator. 1146 SourceLocation getOperatorLoc() const { return Loc; } 1147 void setOperatorLoc(SourceLocation L) { Loc = L; } 1148 1149 /// isPostfix - Return true if this is a postfix operation, like x++. 1150 static bool isPostfix(Opcode Op) { 1151 return Op == UO_PostInc || Op == UO_PostDec; 1152 } 1153 1154 /// isPostfix - Return true if this is a prefix operation, like --x. 1155 static bool isPrefix(Opcode Op) { 1156 return Op == UO_PreInc || Op == UO_PreDec; 1157 } 1158 1159 bool isPrefix() const { return isPrefix(getOpcode()); } 1160 bool isPostfix() const { return isPostfix(getOpcode()); } 1161 bool isIncrementOp() const { 1162 return Opc == UO_PreInc || Opc == UO_PostInc; 1163 } 1164 bool isIncrementDecrementOp() const { 1165 return Opc <= UO_PreDec; 1166 } 1167 static bool isArithmeticOp(Opcode Op) { 1168 return Op >= UO_Plus && Op <= UO_LNot; 1169 } 1170 bool isArithmeticOp() const { return isArithmeticOp(getOpcode()); } 1171 1172 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 1173 /// corresponds to, e.g. "sizeof" or "[pre]++" 1174 static const char *getOpcodeStr(Opcode Op); 1175 1176 /// \brief Retrieve the unary opcode that corresponds to the given 1177 /// overloaded operator. 1178 static Opcode getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix); 1179 1180 /// \brief Retrieve the overloaded operator kind that corresponds to 1181 /// the given unary opcode. 1182 static OverloadedOperatorKind getOverloadedOperator(Opcode Opc); 1183 1184 virtual SourceRange getSourceRange() const { 1185 if (isPostfix()) 1186 return SourceRange(Val->getLocStart(), Loc); 1187 else 1188 return SourceRange(Loc, Val->getLocEnd()); 1189 } 1190 virtual SourceLocation getExprLoc() const { return Loc; } 1191 1192 static bool classof(const Stmt *T) { 1193 return T->getStmtClass() == UnaryOperatorClass; 1194 } 1195 static bool classof(const UnaryOperator *) { return true; } 1196 1197 // Iterators 1198 virtual child_iterator child_begin(); 1199 virtual child_iterator child_end(); 1200}; 1201 1202/// OffsetOfExpr - [C99 7.17] - This represents an expression of the form 1203/// offsetof(record-type, member-designator). For example, given: 1204/// @code 1205/// struct S { 1206/// float f; 1207/// double d; 1208/// }; 1209/// struct T { 1210/// int i; 1211/// struct S s[10]; 1212/// }; 1213/// @endcode 1214/// we can represent and evaluate the expression @c offsetof(struct T, s[2].d). 1215 1216class OffsetOfExpr : public Expr { 1217public: 1218 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 1219 class OffsetOfNode { 1220 public: 1221 /// \brief The kind of offsetof node we have. 1222 enum Kind { 1223 /// \brief An index into an array. 1224 Array = 0x00, 1225 /// \brief A field. 1226 Field = 0x01, 1227 /// \brief A field in a dependent type, known only by its name. 1228 Identifier = 0x02, 1229 /// \brief An implicit indirection through a C++ base class, when the 1230 /// field found is in a base class. 1231 Base = 0x03 1232 }; 1233 1234 private: 1235 enum { MaskBits = 2, Mask = 0x03 }; 1236 1237 /// \brief The source range that covers this part of the designator. 1238 SourceRange Range; 1239 1240 /// \brief The data describing the designator, which comes in three 1241 /// different forms, depending on the lower two bits. 1242 /// - An unsigned index into the array of Expr*'s stored after this node 1243 /// in memory, for [constant-expression] designators. 1244 /// - A FieldDecl*, for references to a known field. 1245 /// - An IdentifierInfo*, for references to a field with a given name 1246 /// when the class type is dependent. 1247 /// - A CXXBaseSpecifier*, for references that look at a field in a 1248 /// base class. 1249 uintptr_t Data; 1250 1251 public: 1252 /// \brief Create an offsetof node that refers to an array element. 1253 OffsetOfNode(SourceLocation LBracketLoc, unsigned Index, 1254 SourceLocation RBracketLoc) 1255 : Range(LBracketLoc, RBracketLoc), Data((Index << 2) | Array) { } 1256 1257 /// \brief Create an offsetof node that refers to a field. 1258 OffsetOfNode(SourceLocation DotLoc, FieldDecl *Field, 1259 SourceLocation NameLoc) 1260 : Range(DotLoc.isValid()? DotLoc : NameLoc, NameLoc), 1261 Data(reinterpret_cast<uintptr_t>(Field) | OffsetOfNode::Field) { } 1262 1263 /// \brief Create an offsetof node that refers to an identifier. 1264 OffsetOfNode(SourceLocation DotLoc, IdentifierInfo *Name, 1265 SourceLocation NameLoc) 1266 : Range(DotLoc.isValid()? DotLoc : NameLoc, NameLoc), 1267 Data(reinterpret_cast<uintptr_t>(Name) | Identifier) { } 1268 1269 /// \brief Create an offsetof node that refers into a C++ base class. 1270 explicit OffsetOfNode(const CXXBaseSpecifier *Base) 1271 : Range(), Data(reinterpret_cast<uintptr_t>(Base) | OffsetOfNode::Base) {} 1272 1273 /// \brief Determine what kind of offsetof node this is. 1274 Kind getKind() const { 1275 return static_cast<Kind>(Data & Mask); 1276 } 1277 1278 /// \brief For an array element node, returns the index into the array 1279 /// of expressions. 1280 unsigned getArrayExprIndex() const { 1281 assert(getKind() == Array); 1282 return Data >> 2; 1283 } 1284 1285 /// \brief For a field offsetof node, returns the field. 1286 FieldDecl *getField() const { 1287 assert(getKind() == Field); 1288 return reinterpret_cast<FieldDecl *>(Data & ~(uintptr_t)Mask); 1289 } 1290 1291 /// \brief For a field or identifier offsetof node, returns the name of 1292 /// the field. 1293 IdentifierInfo *getFieldName() const; 1294 1295 /// \brief For a base class node, returns the base specifier. 1296 CXXBaseSpecifier *getBase() const { 1297 assert(getKind() == Base); 1298 return reinterpret_cast<CXXBaseSpecifier *>(Data & ~(uintptr_t)Mask); 1299 } 1300 1301 /// \brief Retrieve the source range that covers this offsetof node. 1302 /// 1303 /// For an array element node, the source range contains the locations of 1304 /// the square brackets. For a field or identifier node, the source range 1305 /// contains the location of the period (if there is one) and the 1306 /// identifier. 1307 SourceRange getRange() const { return Range; } 1308 }; 1309 1310private: 1311 1312 SourceLocation OperatorLoc, RParenLoc; 1313 // Base type; 1314 TypeSourceInfo *TSInfo; 1315 // Number of sub-components (i.e. instances of OffsetOfNode). 1316 unsigned NumComps; 1317 // Number of sub-expressions (i.e. array subscript expressions). 1318 unsigned NumExprs; 1319 1320 OffsetOfExpr(ASTContext &C, QualType type, 1321 SourceLocation OperatorLoc, TypeSourceInfo *tsi, 1322 OffsetOfNode* compsPtr, unsigned numComps, 1323 Expr** exprsPtr, unsigned numExprs, 1324 SourceLocation RParenLoc); 1325 1326 explicit OffsetOfExpr(unsigned numComps, unsigned numExprs) 1327 : Expr(OffsetOfExprClass, EmptyShell()), 1328 TSInfo(0), NumComps(numComps), NumExprs(numExprs) {} 1329 1330public: 1331 1332 static OffsetOfExpr *Create(ASTContext &C, QualType type, 1333 SourceLocation OperatorLoc, TypeSourceInfo *tsi, 1334 OffsetOfNode* compsPtr, unsigned numComps, 1335 Expr** exprsPtr, unsigned numExprs, 1336 SourceLocation RParenLoc); 1337 1338 static OffsetOfExpr *CreateEmpty(ASTContext &C, 1339 unsigned NumComps, unsigned NumExprs); 1340 1341 /// getOperatorLoc - Return the location of the operator. 1342 SourceLocation getOperatorLoc() const { return OperatorLoc; } 1343 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 1344 1345 /// \brief Return the location of the right parentheses. 1346 SourceLocation getRParenLoc() const { return RParenLoc; } 1347 void setRParenLoc(SourceLocation R) { RParenLoc = R; } 1348 1349 TypeSourceInfo *getTypeSourceInfo() const { 1350 return TSInfo; 1351 } 1352 void setTypeSourceInfo(TypeSourceInfo *tsi) { 1353 TSInfo = tsi; 1354 } 1355 1356 const OffsetOfNode &getComponent(unsigned Idx) { 1357 assert(Idx < NumComps && "Subscript out of range"); 1358 return reinterpret_cast<OffsetOfNode *> (this + 1)[Idx]; 1359 } 1360 1361 void setComponent(unsigned Idx, OffsetOfNode ON) { 1362 assert(Idx < NumComps && "Subscript out of range"); 1363 reinterpret_cast<OffsetOfNode *> (this + 1)[Idx] = ON; 1364 } 1365 1366 unsigned getNumComponents() const { 1367 return NumComps; 1368 } 1369 1370 Expr* getIndexExpr(unsigned Idx) { 1371 assert(Idx < NumExprs && "Subscript out of range"); 1372 return reinterpret_cast<Expr **>( 1373 reinterpret_cast<OffsetOfNode *>(this+1) + NumComps)[Idx]; 1374 } 1375 1376 void setIndexExpr(unsigned Idx, Expr* E) { 1377 assert(Idx < NumComps && "Subscript out of range"); 1378 reinterpret_cast<Expr **>( 1379 reinterpret_cast<OffsetOfNode *>(this+1) + NumComps)[Idx] = E; 1380 } 1381 1382 unsigned getNumExpressions() const { 1383 return NumExprs; 1384 } 1385 1386 virtual SourceRange getSourceRange() const { 1387 return SourceRange(OperatorLoc, RParenLoc); 1388 } 1389 1390 static bool classof(const Stmt *T) { 1391 return T->getStmtClass() == OffsetOfExprClass; 1392 } 1393 1394 static bool classof(const OffsetOfExpr *) { return true; } 1395 1396 // Iterators 1397 virtual child_iterator child_begin(); 1398 virtual child_iterator child_end(); 1399}; 1400 1401/// SizeOfAlignOfExpr - [C99 6.5.3.4] - This is for sizeof/alignof, both of 1402/// types and expressions. 1403class SizeOfAlignOfExpr : public Expr { 1404 bool isSizeof : 1; // true if sizeof, false if alignof. 1405 bool isType : 1; // true if operand is a type, false if an expression 1406 union { 1407 TypeSourceInfo *Ty; 1408 Stmt *Ex; 1409 } Argument; 1410 SourceLocation OpLoc, RParenLoc; 1411 1412public: 1413 SizeOfAlignOfExpr(bool issizeof, TypeSourceInfo *TInfo, 1414 QualType resultType, SourceLocation op, 1415 SourceLocation rp) : 1416 Expr(SizeOfAlignOfExprClass, resultType, 1417 false, // Never type-dependent (C++ [temp.dep.expr]p3). 1418 // Value-dependent if the argument is type-dependent. 1419 TInfo->getType()->isDependentType()), 1420 isSizeof(issizeof), isType(true), OpLoc(op), RParenLoc(rp) { 1421 Argument.Ty = TInfo; 1422 } 1423 1424 SizeOfAlignOfExpr(bool issizeof, Expr *E, 1425 QualType resultType, SourceLocation op, 1426 SourceLocation rp) : 1427 Expr(SizeOfAlignOfExprClass, resultType, 1428 false, // Never type-dependent (C++ [temp.dep.expr]p3). 1429 // Value-dependent if the argument is type-dependent. 1430 E->isTypeDependent()), 1431 isSizeof(issizeof), isType(false), OpLoc(op), RParenLoc(rp) { 1432 Argument.Ex = E; 1433 } 1434 1435 /// \brief Construct an empty sizeof/alignof expression. 1436 explicit SizeOfAlignOfExpr(EmptyShell Empty) 1437 : Expr(SizeOfAlignOfExprClass, Empty) { } 1438 1439 bool isSizeOf() const { return isSizeof; } 1440 void setSizeof(bool S) { isSizeof = S; } 1441 1442 bool isArgumentType() const { return isType; } 1443 QualType getArgumentType() const { 1444 return getArgumentTypeInfo()->getType(); 1445 } 1446 TypeSourceInfo *getArgumentTypeInfo() const { 1447 assert(isArgumentType() && "calling getArgumentType() when arg is expr"); 1448 return Argument.Ty; 1449 } 1450 Expr *getArgumentExpr() { 1451 assert(!isArgumentType() && "calling getArgumentExpr() when arg is type"); 1452 return static_cast<Expr*>(Argument.Ex); 1453 } 1454 const Expr *getArgumentExpr() const { 1455 return const_cast<SizeOfAlignOfExpr*>(this)->getArgumentExpr(); 1456 } 1457 1458 void setArgument(Expr *E) { Argument.Ex = E; isType = false; } 1459 void setArgument(TypeSourceInfo *TInfo) { 1460 Argument.Ty = TInfo; 1461 isType = true; 1462 } 1463 1464 /// Gets the argument type, or the type of the argument expression, whichever 1465 /// is appropriate. 1466 QualType getTypeOfArgument() const { 1467 return isArgumentType() ? getArgumentType() : getArgumentExpr()->getType(); 1468 } 1469 1470 SourceLocation getOperatorLoc() const { return OpLoc; } 1471 void setOperatorLoc(SourceLocation L) { OpLoc = L; } 1472 1473 SourceLocation getRParenLoc() const { return RParenLoc; } 1474 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1475 1476 virtual SourceRange getSourceRange() const { 1477 return SourceRange(OpLoc, RParenLoc); 1478 } 1479 1480 static bool classof(const Stmt *T) { 1481 return T->getStmtClass() == SizeOfAlignOfExprClass; 1482 } 1483 static bool classof(const SizeOfAlignOfExpr *) { return true; } 1484 1485 // Iterators 1486 virtual child_iterator child_begin(); 1487 virtual child_iterator child_end(); 1488}; 1489 1490//===----------------------------------------------------------------------===// 1491// Postfix Operators. 1492//===----------------------------------------------------------------------===// 1493 1494/// ArraySubscriptExpr - [C99 6.5.2.1] Array Subscripting. 1495class ArraySubscriptExpr : public Expr { 1496 enum { LHS, RHS, END_EXPR=2 }; 1497 Stmt* SubExprs[END_EXPR]; 1498 SourceLocation RBracketLoc; 1499public: 1500 ArraySubscriptExpr(Expr *lhs, Expr *rhs, QualType t, 1501 SourceLocation rbracketloc) 1502 : Expr(ArraySubscriptExprClass, t, 1503 lhs->isTypeDependent() || rhs->isTypeDependent(), 1504 lhs->isValueDependent() || rhs->isValueDependent()), 1505 RBracketLoc(rbracketloc) { 1506 SubExprs[LHS] = lhs; 1507 SubExprs[RHS] = rhs; 1508 } 1509 1510 /// \brief Create an empty array subscript expression. 1511 explicit ArraySubscriptExpr(EmptyShell Shell) 1512 : Expr(ArraySubscriptExprClass, Shell) { } 1513 1514 /// An array access can be written A[4] or 4[A] (both are equivalent). 1515 /// - getBase() and getIdx() always present the normalized view: A[4]. 1516 /// In this case getBase() returns "A" and getIdx() returns "4". 1517 /// - getLHS() and getRHS() present the syntactic view. e.g. for 1518 /// 4[A] getLHS() returns "4". 1519 /// Note: Because vector element access is also written A[4] we must 1520 /// predicate the format conversion in getBase and getIdx only on the 1521 /// the type of the RHS, as it is possible for the LHS to be a vector of 1522 /// integer type 1523 Expr *getLHS() { return cast<Expr>(SubExprs[LHS]); } 1524 const Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } 1525 void setLHS(Expr *E) { SubExprs[LHS] = E; } 1526 1527 Expr *getRHS() { return cast<Expr>(SubExprs[RHS]); } 1528 const Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 1529 void setRHS(Expr *E) { SubExprs[RHS] = E; } 1530 1531 Expr *getBase() { 1532 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getLHS():getRHS()); 1533 } 1534 1535 const Expr *getBase() const { 1536 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getLHS():getRHS()); 1537 } 1538 1539 Expr *getIdx() { 1540 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getRHS():getLHS()); 1541 } 1542 1543 const Expr *getIdx() const { 1544 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getRHS():getLHS()); 1545 } 1546 1547 virtual SourceRange getSourceRange() const { 1548 return SourceRange(getLHS()->getLocStart(), RBracketLoc); 1549 } 1550 1551 SourceLocation getRBracketLoc() const { return RBracketLoc; } 1552 void setRBracketLoc(SourceLocation L) { RBracketLoc = L; } 1553 1554 virtual SourceLocation getExprLoc() const { return getBase()->getExprLoc(); } 1555 1556 static bool classof(const Stmt *T) { 1557 return T->getStmtClass() == ArraySubscriptExprClass; 1558 } 1559 static bool classof(const ArraySubscriptExpr *) { return true; } 1560 1561 // Iterators 1562 virtual child_iterator child_begin(); 1563 virtual child_iterator child_end(); 1564}; 1565 1566 1567/// CallExpr - Represents a function call (C99 6.5.2.2, C++ [expr.call]). 1568/// CallExpr itself represents a normal function call, e.g., "f(x, 2)", 1569/// while its subclasses may represent alternative syntax that (semantically) 1570/// results in a function call. For example, CXXOperatorCallExpr is 1571/// a subclass for overloaded operator calls that use operator syntax, e.g., 1572/// "str1 + str2" to resolve to a function call. 1573class CallExpr : public Expr { 1574 enum { FN=0, ARGS_START=1 }; 1575 Stmt **SubExprs; 1576 unsigned NumArgs; 1577 SourceLocation RParenLoc; 1578 1579protected: 1580 // This version of the constructor is for derived classes. 1581 CallExpr(ASTContext& C, StmtClass SC, Expr *fn, Expr **args, unsigned numargs, 1582 QualType t, SourceLocation rparenloc); 1583 1584public: 1585 CallExpr(ASTContext& C, Expr *fn, Expr **args, unsigned numargs, QualType t, 1586 SourceLocation rparenloc); 1587 1588 /// \brief Build an empty call expression. 1589 CallExpr(ASTContext &C, StmtClass SC, EmptyShell Empty); 1590 1591 const Expr *getCallee() const { return cast<Expr>(SubExprs[FN]); } 1592 Expr *getCallee() { return cast<Expr>(SubExprs[FN]); } 1593 void setCallee(Expr *F) { SubExprs[FN] = F; } 1594 1595 Decl *getCalleeDecl(); 1596 const Decl *getCalleeDecl() const { 1597 return const_cast<CallExpr*>(this)->getCalleeDecl(); 1598 } 1599 1600 /// \brief If the callee is a FunctionDecl, return it. Otherwise return 0. 1601 FunctionDecl *getDirectCallee(); 1602 const FunctionDecl *getDirectCallee() const { 1603 return const_cast<CallExpr*>(this)->getDirectCallee(); 1604 } 1605 1606 /// getNumArgs - Return the number of actual arguments to this call. 1607 /// 1608 unsigned getNumArgs() const { return NumArgs; } 1609 1610 /// getArg - Return the specified argument. 1611 Expr *getArg(unsigned Arg) { 1612 assert(Arg < NumArgs && "Arg access out of range!"); 1613 return cast<Expr>(SubExprs[Arg+ARGS_START]); 1614 } 1615 const Expr *getArg(unsigned Arg) const { 1616 assert(Arg < NumArgs && "Arg access out of range!"); 1617 return cast<Expr>(SubExprs[Arg+ARGS_START]); 1618 } 1619 1620 /// setArg - Set the specified argument. 1621 void setArg(unsigned Arg, Expr *ArgExpr) { 1622 assert(Arg < NumArgs && "Arg access out of range!"); 1623 SubExprs[Arg+ARGS_START] = ArgExpr; 1624 } 1625 1626 /// setNumArgs - This changes the number of arguments present in this call. 1627 /// Any orphaned expressions are deleted by this, and any new operands are set 1628 /// to null. 1629 void setNumArgs(ASTContext& C, unsigned NumArgs); 1630 1631 typedef ExprIterator arg_iterator; 1632 typedef ConstExprIterator const_arg_iterator; 1633 1634 arg_iterator arg_begin() { return SubExprs+ARGS_START; } 1635 arg_iterator arg_end() { return SubExprs+ARGS_START+getNumArgs(); } 1636 const_arg_iterator arg_begin() const { return SubExprs+ARGS_START; } 1637 const_arg_iterator arg_end() const { return SubExprs+ARGS_START+getNumArgs();} 1638 1639 /// getNumCommas - Return the number of commas that must have been present in 1640 /// this function call. 1641 unsigned getNumCommas() const { return NumArgs ? NumArgs - 1 : 0; } 1642 1643 /// isBuiltinCall - If this is a call to a builtin, return the builtin ID. If 1644 /// not, return 0. 1645 unsigned isBuiltinCall(ASTContext &Context) const; 1646 1647 /// getCallReturnType - Get the return type of the call expr. This is not 1648 /// always the type of the expr itself, if the return type is a reference 1649 /// type. 1650 QualType getCallReturnType() const; 1651 1652 SourceLocation getRParenLoc() const { return RParenLoc; } 1653 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1654 1655 virtual SourceRange getSourceRange() const { 1656 return SourceRange(getCallee()->getLocStart(), RParenLoc); 1657 } 1658 1659 static bool classof(const Stmt *T) { 1660 return T->getStmtClass() >= firstCallExprConstant && 1661 T->getStmtClass() <= lastCallExprConstant; 1662 } 1663 static bool classof(const CallExpr *) { return true; } 1664 1665 // Iterators 1666 virtual child_iterator child_begin(); 1667 virtual child_iterator child_end(); 1668}; 1669 1670/// MemberExpr - [C99 6.5.2.3] Structure and Union Members. X->F and X.F. 1671/// 1672class MemberExpr : public Expr { 1673 /// Extra data stored in some member expressions. 1674 struct MemberNameQualifier : public NameQualifier { 1675 DeclAccessPair FoundDecl; 1676 }; 1677 1678 /// Base - the expression for the base pointer or structure references. In 1679 /// X.F, this is "X". 1680 Stmt *Base; 1681 1682 /// MemberDecl - This is the decl being referenced by the field/member name. 1683 /// In X.F, this is the decl referenced by F. 1684 ValueDecl *MemberDecl; 1685 1686 /// MemberLoc - This is the location of the member name. 1687 SourceLocation MemberLoc; 1688 1689 /// MemberDNLoc - Provides source/type location info for the 1690 /// declaration name embedded in MemberDecl. 1691 DeclarationNameLoc MemberDNLoc; 1692 1693 /// IsArrow - True if this is "X->F", false if this is "X.F". 1694 bool IsArrow : 1; 1695 1696 /// \brief True if this member expression used a nested-name-specifier to 1697 /// refer to the member, e.g., "x->Base::f", or found its member via a using 1698 /// declaration. When true, a MemberNameQualifier 1699 /// structure is allocated immediately after the MemberExpr. 1700 bool HasQualifierOrFoundDecl : 1; 1701 1702 /// \brief True if this member expression specified a template argument list 1703 /// explicitly, e.g., x->f<int>. When true, an ExplicitTemplateArgumentList 1704 /// structure (and its TemplateArguments) are allocated immediately after 1705 /// the MemberExpr or, if the member expression also has a qualifier, after 1706 /// the MemberNameQualifier structure. 1707 bool HasExplicitTemplateArgumentList : 1; 1708 1709 /// \brief Retrieve the qualifier that preceded the member name, if any. 1710 MemberNameQualifier *getMemberQualifier() { 1711 assert(HasQualifierOrFoundDecl); 1712 return reinterpret_cast<MemberNameQualifier *> (this + 1); 1713 } 1714 1715 /// \brief Retrieve the qualifier that preceded the member name, if any. 1716 const MemberNameQualifier *getMemberQualifier() const { 1717 return const_cast<MemberExpr *>(this)->getMemberQualifier(); 1718 } 1719 1720public: 1721 MemberExpr(Expr *base, bool isarrow, ValueDecl *memberdecl, 1722 const DeclarationNameInfo &NameInfo, QualType ty) 1723 : Expr(MemberExprClass, ty, 1724 base->isTypeDependent(), base->isValueDependent()), 1725 Base(base), MemberDecl(memberdecl), MemberLoc(NameInfo.getLoc()), 1726 MemberDNLoc(NameInfo.getInfo()), IsArrow(isarrow), 1727 HasQualifierOrFoundDecl(false), HasExplicitTemplateArgumentList(false) { 1728 assert(memberdecl->getDeclName() == NameInfo.getName()); 1729 } 1730 1731 // NOTE: this constructor should be used only when it is known that 1732 // the member name can not provide additional syntactic info 1733 // (i.e., source locations for C++ operator names or type source info 1734 // for constructors, destructors and conversion oeprators). 1735 MemberExpr(Expr *base, bool isarrow, ValueDecl *memberdecl, 1736 SourceLocation l, QualType ty) 1737 : Expr(MemberExprClass, ty, 1738 base->isTypeDependent(), base->isValueDependent()), 1739 Base(base), MemberDecl(memberdecl), MemberLoc(l), MemberDNLoc(), 1740 IsArrow(isarrow), 1741 HasQualifierOrFoundDecl(false), HasExplicitTemplateArgumentList(false) {} 1742 1743 static MemberExpr *Create(ASTContext &C, Expr *base, bool isarrow, 1744 NestedNameSpecifier *qual, SourceRange qualrange, 1745 ValueDecl *memberdecl, DeclAccessPair founddecl, 1746 DeclarationNameInfo MemberNameInfo, 1747 const TemplateArgumentListInfo *targs, 1748 QualType ty); 1749 1750 void setBase(Expr *E) { Base = E; } 1751 Expr *getBase() const { return cast<Expr>(Base); } 1752 1753 /// \brief Retrieve the member declaration to which this expression refers. 1754 /// 1755 /// The returned declaration will either be a FieldDecl or (in C++) 1756 /// a CXXMethodDecl. 1757 ValueDecl *getMemberDecl() const { return MemberDecl; } 1758 void setMemberDecl(ValueDecl *D) { MemberDecl = D; } 1759 1760 /// \brief Retrieves the declaration found by lookup. 1761 DeclAccessPair getFoundDecl() const { 1762 if (!HasQualifierOrFoundDecl) 1763 return DeclAccessPair::make(getMemberDecl(), 1764 getMemberDecl()->getAccess()); 1765 return getMemberQualifier()->FoundDecl; 1766 } 1767 1768 /// \brief Determines whether this member expression actually had 1769 /// a C++ nested-name-specifier prior to the name of the member, e.g., 1770 /// x->Base::foo. 1771 bool hasQualifier() const { return getQualifier() != 0; } 1772 1773 /// \brief If the member name was qualified, retrieves the source range of 1774 /// the nested-name-specifier that precedes the member name. Otherwise, 1775 /// returns an empty source range. 1776 SourceRange getQualifierRange() const { 1777 if (!HasQualifierOrFoundDecl) 1778 return SourceRange(); 1779 1780 return getMemberQualifier()->Range; 1781 } 1782 1783 /// \brief If the member name was qualified, retrieves the 1784 /// nested-name-specifier that precedes the member name. Otherwise, returns 1785 /// NULL. 1786 NestedNameSpecifier *getQualifier() const { 1787 if (!HasQualifierOrFoundDecl) 1788 return 0; 1789 1790 return getMemberQualifier()->NNS; 1791 } 1792 1793 /// \brief Determines whether this member expression actually had a C++ 1794 /// template argument list explicitly specified, e.g., x.f<int>. 1795 bool hasExplicitTemplateArgs() const { 1796 return HasExplicitTemplateArgumentList; 1797 } 1798 1799 /// \brief Copies the template arguments (if present) into the given 1800 /// structure. 1801 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1802 if (hasExplicitTemplateArgs()) 1803 getExplicitTemplateArgs().copyInto(List); 1804 } 1805 1806 /// \brief Retrieve the explicit template argument list that 1807 /// follow the member template name. This must only be called on an 1808 /// expression with explicit template arguments. 1809 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 1810 assert(HasExplicitTemplateArgumentList); 1811 if (!HasQualifierOrFoundDecl) 1812 return *reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 1813 1814 return *reinterpret_cast<ExplicitTemplateArgumentList *>( 1815 getMemberQualifier() + 1); 1816 } 1817 1818 /// \brief Retrieve the explicit template argument list that 1819 /// followed the member template name. This must only be called on 1820 /// an expression with explicit template arguments. 1821 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1822 return const_cast<MemberExpr *>(this)->getExplicitTemplateArgs(); 1823 } 1824 1825 /// \brief Retrieves the optional explicit template arguments. 1826 /// This points to the same data as getExplicitTemplateArgs(), but 1827 /// returns null if there are no explicit template arguments. 1828 const ExplicitTemplateArgumentList *getOptionalExplicitTemplateArgs() const { 1829 if (!hasExplicitTemplateArgs()) return 0; 1830 return &getExplicitTemplateArgs(); 1831 } 1832 1833 /// \brief Retrieve the location of the left angle bracket following the 1834 /// member name ('<'), if any. 1835 SourceLocation getLAngleLoc() const { 1836 if (!HasExplicitTemplateArgumentList) 1837 return SourceLocation(); 1838 1839 return getExplicitTemplateArgs().LAngleLoc; 1840 } 1841 1842 /// \brief Retrieve the template arguments provided as part of this 1843 /// template-id. 1844 const TemplateArgumentLoc *getTemplateArgs() const { 1845 if (!HasExplicitTemplateArgumentList) 1846 return 0; 1847 1848 return getExplicitTemplateArgs().getTemplateArgs(); 1849 } 1850 1851 /// \brief Retrieve the number of template arguments provided as part of this 1852 /// template-id. 1853 unsigned getNumTemplateArgs() const { 1854 if (!HasExplicitTemplateArgumentList) 1855 return 0; 1856 1857 return getExplicitTemplateArgs().NumTemplateArgs; 1858 } 1859 1860 /// \brief Retrieve the location of the right angle bracket following the 1861 /// template arguments ('>'). 1862 SourceLocation getRAngleLoc() const { 1863 if (!HasExplicitTemplateArgumentList) 1864 return SourceLocation(); 1865 1866 return getExplicitTemplateArgs().RAngleLoc; 1867 } 1868 1869 /// \brief Retrieve the member declaration name info. 1870 DeclarationNameInfo getMemberNameInfo() const { 1871 return DeclarationNameInfo(MemberDecl->getDeclName(), 1872 MemberLoc, MemberDNLoc); 1873 } 1874 1875 bool isArrow() const { return IsArrow; } 1876 void setArrow(bool A) { IsArrow = A; } 1877 1878 /// getMemberLoc - Return the location of the "member", in X->F, it is the 1879 /// location of 'F'. 1880 SourceLocation getMemberLoc() const { return MemberLoc; } 1881 void setMemberLoc(SourceLocation L) { MemberLoc = L; } 1882 1883 virtual SourceRange getSourceRange() const { 1884 // If we have an implicit base (like a C++ implicit this), 1885 // make sure not to return its location 1886 SourceLocation EndLoc = (HasExplicitTemplateArgumentList) 1887 ? getRAngleLoc() : getMemberNameInfo().getEndLoc(); 1888 1889 SourceLocation BaseLoc = getBase()->getLocStart(); 1890 if (BaseLoc.isInvalid()) 1891 return SourceRange(MemberLoc, EndLoc); 1892 return SourceRange(BaseLoc, EndLoc); 1893 } 1894 1895 virtual SourceLocation getExprLoc() const { return MemberLoc; } 1896 1897 static bool classof(const Stmt *T) { 1898 return T->getStmtClass() == MemberExprClass; 1899 } 1900 static bool classof(const MemberExpr *) { return true; } 1901 1902 // Iterators 1903 virtual child_iterator child_begin(); 1904 virtual child_iterator child_end(); 1905}; 1906 1907/// CompoundLiteralExpr - [C99 6.5.2.5] 1908/// 1909class CompoundLiteralExpr : public Expr { 1910 /// LParenLoc - If non-null, this is the location of the left paren in a 1911 /// compound literal like "(int){4}". This can be null if this is a 1912 /// synthesized compound expression. 1913 SourceLocation LParenLoc; 1914 1915 /// The type as written. This can be an incomplete array type, in 1916 /// which case the actual expression type will be different. 1917 TypeSourceInfo *TInfo; 1918 Stmt *Init; 1919 bool FileScope; 1920public: 1921 // FIXME: Can compound literals be value-dependent? 1922 CompoundLiteralExpr(SourceLocation lparenloc, TypeSourceInfo *tinfo, 1923 QualType T, Expr *init, bool fileScope) 1924 : Expr(CompoundLiteralExprClass, T, 1925 tinfo->getType()->isDependentType(), false), 1926 LParenLoc(lparenloc), TInfo(tinfo), Init(init), FileScope(fileScope) {} 1927 1928 /// \brief Construct an empty compound literal. 1929 explicit CompoundLiteralExpr(EmptyShell Empty) 1930 : Expr(CompoundLiteralExprClass, Empty) { } 1931 1932 const Expr *getInitializer() const { return cast<Expr>(Init); } 1933 Expr *getInitializer() { return cast<Expr>(Init); } 1934 void setInitializer(Expr *E) { Init = E; } 1935 1936 bool isFileScope() const { return FileScope; } 1937 void setFileScope(bool FS) { FileScope = FS; } 1938 1939 SourceLocation getLParenLoc() const { return LParenLoc; } 1940 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 1941 1942 TypeSourceInfo *getTypeSourceInfo() const { return TInfo; } 1943 void setTypeSourceInfo(TypeSourceInfo* tinfo) { TInfo = tinfo; } 1944 1945 virtual SourceRange getSourceRange() const { 1946 // FIXME: Init should never be null. 1947 if (!Init) 1948 return SourceRange(); 1949 if (LParenLoc.isInvalid()) 1950 return Init->getSourceRange(); 1951 return SourceRange(LParenLoc, Init->getLocEnd()); 1952 } 1953 1954 static bool classof(const Stmt *T) { 1955 return T->getStmtClass() == CompoundLiteralExprClass; 1956 } 1957 static bool classof(const CompoundLiteralExpr *) { return true; } 1958 1959 // Iterators 1960 virtual child_iterator child_begin(); 1961 virtual child_iterator child_end(); 1962}; 1963 1964/// CastExpr - Base class for type casts, including both implicit 1965/// casts (ImplicitCastExpr) and explicit casts that have some 1966/// representation in the source code (ExplicitCastExpr's derived 1967/// classes). 1968class CastExpr : public Expr { 1969public: 1970 typedef clang::CastKind CastKind; 1971 1972private: 1973 unsigned Kind : 5; 1974 unsigned BasePathSize : BitsRemaining - 5; 1975 Stmt *Op; 1976 1977 void CheckBasePath() const { 1978#ifndef NDEBUG 1979 switch (getCastKind()) { 1980 case CK_DerivedToBase: 1981 case CK_UncheckedDerivedToBase: 1982 case CK_DerivedToBaseMemberPointer: 1983 case CK_BaseToDerived: 1984 case CK_BaseToDerivedMemberPointer: 1985 assert(!path_empty() && "Cast kind should have a base path!"); 1986 break; 1987 1988 // These should not have an inheritance path. 1989 case CK_Unknown: 1990 case CK_BitCast: 1991 case CK_LValueBitCast: 1992 case CK_NoOp: 1993 case CK_Dynamic: 1994 case CK_ToUnion: 1995 case CK_ArrayToPointerDecay: 1996 case CK_FunctionToPointerDecay: 1997 case CK_NullToMemberPointer: 1998 case CK_UserDefinedConversion: 1999 case CK_ConstructorConversion: 2000 case CK_IntegralToPointer: 2001 case CK_PointerToIntegral: 2002 case CK_ToVoid: 2003 case CK_VectorSplat: 2004 case CK_IntegralCast: 2005 case CK_IntegralToFloating: 2006 case CK_FloatingToIntegral: 2007 case CK_FloatingCast: 2008 case CK_MemberPointerToBoolean: 2009 case CK_AnyPointerToObjCPointerCast: 2010 case CK_AnyPointerToBlockPointerCast: 2011 case CK_ObjCObjectLValueCast: 2012 assert(path_empty() && "Cast kind should not have a base path!"); 2013 break; 2014 } 2015#endif 2016 } 2017 2018 const CXXBaseSpecifier * const *path_buffer() const { 2019 return const_cast<CastExpr*>(this)->path_buffer(); 2020 } 2021 CXXBaseSpecifier **path_buffer(); 2022 2023protected: 2024 CastExpr(StmtClass SC, QualType ty, const CastKind kind, Expr *op, 2025 unsigned BasePathSize) : 2026 Expr(SC, ty, 2027 // Cast expressions are type-dependent if the type is 2028 // dependent (C++ [temp.dep.expr]p3). 2029 ty->isDependentType(), 2030 // Cast expressions are value-dependent if the type is 2031 // dependent or if the subexpression is value-dependent. 2032 ty->isDependentType() || (op && op->isValueDependent())), 2033 Kind(kind), BasePathSize(BasePathSize), Op(op) { 2034 CheckBasePath(); 2035 } 2036 2037 /// \brief Construct an empty cast. 2038 CastExpr(StmtClass SC, EmptyShell Empty, unsigned BasePathSize) 2039 : Expr(SC, Empty), BasePathSize(BasePathSize) { } 2040 2041public: 2042 CastKind getCastKind() const { return static_cast<CastKind>(Kind); } 2043 void setCastKind(CastKind K) { Kind = K; } 2044 const char *getCastKindName() const; 2045 2046 Expr *getSubExpr() { return cast<Expr>(Op); } 2047 const Expr *getSubExpr() const { return cast<Expr>(Op); } 2048 void setSubExpr(Expr *E) { Op = E; } 2049 2050 /// \brief Retrieve the cast subexpression as it was written in the source 2051 /// code, looking through any implicit casts or other intermediate nodes 2052 /// introduced by semantic analysis. 2053 Expr *getSubExprAsWritten(); 2054 const Expr *getSubExprAsWritten() const { 2055 return const_cast<CastExpr *>(this)->getSubExprAsWritten(); 2056 } 2057 2058 typedef CXXBaseSpecifier **path_iterator; 2059 typedef const CXXBaseSpecifier * const *path_const_iterator; 2060 bool path_empty() const { return BasePathSize == 0; } 2061 unsigned path_size() const { return BasePathSize; } 2062 path_iterator path_begin() { return path_buffer(); } 2063 path_iterator path_end() { return path_buffer() + path_size(); } 2064 path_const_iterator path_begin() const { return path_buffer(); } 2065 path_const_iterator path_end() const { return path_buffer() + path_size(); } 2066 2067 void setCastPath(const CXXCastPath &Path); 2068 2069 static bool classof(const Stmt *T) { 2070 return T->getStmtClass() >= firstCastExprConstant && 2071 T->getStmtClass() <= lastCastExprConstant; 2072 } 2073 static bool classof(const CastExpr *) { return true; } 2074 2075 // Iterators 2076 virtual child_iterator child_begin(); 2077 virtual child_iterator child_end(); 2078}; 2079 2080/// ImplicitCastExpr - Allows us to explicitly represent implicit type 2081/// conversions, which have no direct representation in the original 2082/// source code. For example: converting T[]->T*, void f()->void 2083/// (*f)(), float->double, short->int, etc. 2084/// 2085/// In C, implicit casts always produce rvalues. However, in C++, an 2086/// implicit cast whose result is being bound to a reference will be 2087/// an lvalue or xvalue. For example: 2088/// 2089/// @code 2090/// class Base { }; 2091/// class Derived : public Base { }; 2092/// Derived &&ref(); 2093/// void f(Derived d) { 2094/// Base& b = d; // initializer is an ImplicitCastExpr 2095/// // to an lvalue of type Base 2096/// Base&& r = ref(); // initializer is an ImplicitCastExpr 2097/// // to an xvalue of type Base 2098/// } 2099/// @endcode 2100class ImplicitCastExpr : public CastExpr { 2101private: 2102 ImplicitCastExpr(QualType ty, CastKind kind, Expr *op, 2103 unsigned BasePathLength, ExprValueKind VK) 2104 : CastExpr(ImplicitCastExprClass, ty, kind, op, BasePathLength) { 2105 ValueKind = VK; 2106 } 2107 2108 /// \brief Construct an empty implicit cast. 2109 explicit ImplicitCastExpr(EmptyShell Shell, unsigned PathSize) 2110 : CastExpr(ImplicitCastExprClass, Shell, PathSize) { } 2111 2112public: 2113 enum OnStack_t { OnStack }; 2114 ImplicitCastExpr(OnStack_t _, QualType ty, CastKind kind, Expr *op, 2115 ExprValueKind VK) 2116 : CastExpr(ImplicitCastExprClass, ty, kind, op, 0) { 2117 ValueKind = VK; 2118 } 2119 2120 static ImplicitCastExpr *Create(ASTContext &Context, QualType T, 2121 CastKind Kind, Expr *Operand, 2122 const CXXCastPath *BasePath, 2123 ExprValueKind Cat); 2124 2125 static ImplicitCastExpr *CreateEmpty(ASTContext &Context, unsigned PathSize); 2126 2127 virtual SourceRange getSourceRange() const { 2128 return getSubExpr()->getSourceRange(); 2129 } 2130 2131 /// getValueKind - The value kind that this cast produces. 2132 ExprValueKind getValueKind() const { 2133 return static_cast<ExprValueKind>(ValueKind); 2134 } 2135 2136 /// setValueKind - Set the value kind this cast produces. 2137 void setValueKind(ExprValueKind Cat) { ValueKind = Cat; } 2138 2139 static bool classof(const Stmt *T) { 2140 return T->getStmtClass() == ImplicitCastExprClass; 2141 } 2142 static bool classof(const ImplicitCastExpr *) { return true; } 2143}; 2144 2145/// ExplicitCastExpr - An explicit cast written in the source 2146/// code. 2147/// 2148/// This class is effectively an abstract class, because it provides 2149/// the basic representation of an explicitly-written cast without 2150/// specifying which kind of cast (C cast, functional cast, static 2151/// cast, etc.) was written; specific derived classes represent the 2152/// particular style of cast and its location information. 2153/// 2154/// Unlike implicit casts, explicit cast nodes have two different 2155/// types: the type that was written into the source code, and the 2156/// actual type of the expression as determined by semantic 2157/// analysis. These types may differ slightly. For example, in C++ one 2158/// can cast to a reference type, which indicates that the resulting 2159/// expression will be an lvalue or xvalue. The reference type, however, 2160/// will not be used as the type of the expression. 2161class ExplicitCastExpr : public CastExpr { 2162 /// TInfo - Source type info for the (written) type 2163 /// this expression is casting to. 2164 TypeSourceInfo *TInfo; 2165 2166protected: 2167 ExplicitCastExpr(StmtClass SC, QualType exprTy, CastKind kind, 2168 Expr *op, unsigned PathSize, TypeSourceInfo *writtenTy) 2169 : CastExpr(SC, exprTy, kind, op, PathSize), TInfo(writtenTy) {} 2170 2171 /// \brief Construct an empty explicit cast. 2172 ExplicitCastExpr(StmtClass SC, EmptyShell Shell, unsigned PathSize) 2173 : CastExpr(SC, Shell, PathSize) { } 2174 2175public: 2176 /// getTypeInfoAsWritten - Returns the type source info for the type 2177 /// that this expression is casting to. 2178 TypeSourceInfo *getTypeInfoAsWritten() const { return TInfo; } 2179 void setTypeInfoAsWritten(TypeSourceInfo *writtenTy) { TInfo = writtenTy; } 2180 2181 /// getTypeAsWritten - Returns the type that this expression is 2182 /// casting to, as written in the source code. 2183 QualType getTypeAsWritten() const { return TInfo->getType(); } 2184 2185 static bool classof(const Stmt *T) { 2186 return T->getStmtClass() >= firstExplicitCastExprConstant && 2187 T->getStmtClass() <= lastExplicitCastExprConstant; 2188 } 2189 static bool classof(const ExplicitCastExpr *) { return true; } 2190}; 2191 2192/// CStyleCastExpr - An explicit cast in C (C99 6.5.4) or a C-style 2193/// cast in C++ (C++ [expr.cast]), which uses the syntax 2194/// (Type)expr. For example: @c (int)f. 2195class CStyleCastExpr : public ExplicitCastExpr { 2196 SourceLocation LPLoc; // the location of the left paren 2197 SourceLocation RPLoc; // the location of the right paren 2198 2199 CStyleCastExpr(QualType exprTy, CastKind kind, Expr *op, 2200 unsigned PathSize, TypeSourceInfo *writtenTy, 2201 SourceLocation l, SourceLocation r) 2202 : ExplicitCastExpr(CStyleCastExprClass, exprTy, kind, op, PathSize, 2203 writtenTy), LPLoc(l), RPLoc(r) {} 2204 2205 /// \brief Construct an empty C-style explicit cast. 2206 explicit CStyleCastExpr(EmptyShell Shell, unsigned PathSize) 2207 : ExplicitCastExpr(CStyleCastExprClass, Shell, PathSize) { } 2208 2209public: 2210 static CStyleCastExpr *Create(ASTContext &Context, QualType T, CastKind K, 2211 Expr *Op, const CXXCastPath *BasePath, 2212 TypeSourceInfo *WrittenTy, SourceLocation L, 2213 SourceLocation R); 2214 2215 static CStyleCastExpr *CreateEmpty(ASTContext &Context, unsigned PathSize); 2216 2217 SourceLocation getLParenLoc() const { return LPLoc; } 2218 void setLParenLoc(SourceLocation L) { LPLoc = L; } 2219 2220 SourceLocation getRParenLoc() const { return RPLoc; } 2221 void setRParenLoc(SourceLocation L) { RPLoc = L; } 2222 2223 virtual SourceRange getSourceRange() const { 2224 return SourceRange(LPLoc, getSubExpr()->getSourceRange().getEnd()); 2225 } 2226 static bool classof(const Stmt *T) { 2227 return T->getStmtClass() == CStyleCastExprClass; 2228 } 2229 static bool classof(const CStyleCastExpr *) { return true; } 2230}; 2231 2232/// \brief A builtin binary operation expression such as "x + y" or "x <= y". 2233/// 2234/// This expression node kind describes a builtin binary operation, 2235/// such as "x + y" for integer values "x" and "y". The operands will 2236/// already have been converted to appropriate types (e.g., by 2237/// performing promotions or conversions). 2238/// 2239/// In C++, where operators may be overloaded, a different kind of 2240/// expression node (CXXOperatorCallExpr) is used to express the 2241/// invocation of an overloaded operator with operator syntax. Within 2242/// a C++ template, whether BinaryOperator or CXXOperatorCallExpr is 2243/// used to store an expression "x + y" depends on the subexpressions 2244/// for x and y. If neither x or y is type-dependent, and the "+" 2245/// operator resolves to a built-in operation, BinaryOperator will be 2246/// used to express the computation (x and y may still be 2247/// value-dependent). If either x or y is type-dependent, or if the 2248/// "+" resolves to an overloaded operator, CXXOperatorCallExpr will 2249/// be used to express the computation. 2250class BinaryOperator : public Expr { 2251public: 2252 typedef BinaryOperatorKind Opcode; 2253 2254private: 2255 unsigned Opc : 6; 2256 SourceLocation OpLoc; 2257 2258 enum { LHS, RHS, END_EXPR }; 2259 Stmt* SubExprs[END_EXPR]; 2260public: 2261 2262 BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, 2263 SourceLocation opLoc) 2264 : Expr(BinaryOperatorClass, ResTy, 2265 lhs->isTypeDependent() || rhs->isTypeDependent(), 2266 lhs->isValueDependent() || rhs->isValueDependent()), 2267 Opc(opc), OpLoc(opLoc) { 2268 SubExprs[LHS] = lhs; 2269 SubExprs[RHS] = rhs; 2270 assert(!isCompoundAssignmentOp() && 2271 "Use ArithAssignBinaryOperator for compound assignments"); 2272 } 2273 2274 /// \brief Construct an empty binary operator. 2275 explicit BinaryOperator(EmptyShell Empty) 2276 : Expr(BinaryOperatorClass, Empty), Opc(BO_Comma) { } 2277 2278 SourceLocation getOperatorLoc() const { return OpLoc; } 2279 void setOperatorLoc(SourceLocation L) { OpLoc = L; } 2280 2281 Opcode getOpcode() const { return static_cast<Opcode>(Opc); } 2282 void setOpcode(Opcode O) { Opc = O; } 2283 2284 Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } 2285 void setLHS(Expr *E) { SubExprs[LHS] = E; } 2286 Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 2287 void setRHS(Expr *E) { SubExprs[RHS] = E; } 2288 2289 virtual SourceRange getSourceRange() const { 2290 return SourceRange(getLHS()->getLocStart(), getRHS()->getLocEnd()); 2291 } 2292 2293 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 2294 /// corresponds to, e.g. "<<=". 2295 static const char *getOpcodeStr(Opcode Op); 2296 2297 const char *getOpcodeStr() const { return getOpcodeStr(getOpcode()); } 2298 2299 /// \brief Retrieve the binary opcode that corresponds to the given 2300 /// overloaded operator. 2301 static Opcode getOverloadedOpcode(OverloadedOperatorKind OO); 2302 2303 /// \brief Retrieve the overloaded operator kind that corresponds to 2304 /// the given binary opcode. 2305 static OverloadedOperatorKind getOverloadedOperator(Opcode Opc); 2306 2307 /// predicates to categorize the respective opcodes. 2308 bool isPtrMemOp() const { return Opc == BO_PtrMemD || Opc == BO_PtrMemI; } 2309 bool isMultiplicativeOp() const { return Opc >= BO_Mul && Opc <= BO_Rem; } 2310 static bool isAdditiveOp(Opcode Opc) { return Opc == BO_Add || Opc==BO_Sub; } 2311 bool isAdditiveOp() const { return isAdditiveOp(getOpcode()); } 2312 static bool isShiftOp(Opcode Opc) { return Opc == BO_Shl || Opc == BO_Shr; } 2313 bool isShiftOp() const { return isShiftOp(getOpcode()); } 2314 2315 static bool isBitwiseOp(Opcode Opc) { return Opc >= BO_And && Opc <= BO_Or; } 2316 bool isBitwiseOp() const { return isBitwiseOp(getOpcode()); } 2317 2318 static bool isRelationalOp(Opcode Opc) { return Opc >= BO_LT && Opc<=BO_GE; } 2319 bool isRelationalOp() const { return isRelationalOp(getOpcode()); } 2320 2321 static bool isEqualityOp(Opcode Opc) { return Opc == BO_EQ || Opc == BO_NE; } 2322 bool isEqualityOp() const { return isEqualityOp(getOpcode()); } 2323 2324 static bool isComparisonOp(Opcode Opc) { return Opc >= BO_LT && Opc<=BO_NE; } 2325 bool isComparisonOp() const { return isComparisonOp(getOpcode()); } 2326 2327 static bool isLogicalOp(Opcode Opc) { return Opc == BO_LAnd || Opc==BO_LOr; } 2328 bool isLogicalOp() const { return isLogicalOp(getOpcode()); } 2329 2330 bool isAssignmentOp() const { return Opc >= BO_Assign && Opc <= BO_OrAssign; } 2331 bool isCompoundAssignmentOp() const { 2332 return Opc > BO_Assign && Opc <= BO_OrAssign; 2333 } 2334 bool isShiftAssignOp() const { 2335 return Opc == BO_ShlAssign || Opc == BO_ShrAssign; 2336 } 2337 2338 static bool classof(const Stmt *S) { 2339 return S->getStmtClass() >= firstBinaryOperatorConstant && 2340 S->getStmtClass() <= lastBinaryOperatorConstant; 2341 } 2342 static bool classof(const BinaryOperator *) { return true; } 2343 2344 // Iterators 2345 virtual child_iterator child_begin(); 2346 virtual child_iterator child_end(); 2347 2348protected: 2349 BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, 2350 SourceLocation opLoc, bool dead) 2351 : Expr(CompoundAssignOperatorClass, ResTy, 2352 lhs->isTypeDependent() || rhs->isTypeDependent(), 2353 lhs->isValueDependent() || rhs->isValueDependent()), 2354 Opc(opc), OpLoc(opLoc) { 2355 SubExprs[LHS] = lhs; 2356 SubExprs[RHS] = rhs; 2357 } 2358 2359 BinaryOperator(StmtClass SC, EmptyShell Empty) 2360 : Expr(SC, Empty), Opc(BO_MulAssign) { } 2361}; 2362 2363/// CompoundAssignOperator - For compound assignments (e.g. +=), we keep 2364/// track of the type the operation is performed in. Due to the semantics of 2365/// these operators, the operands are promoted, the aritmetic performed, an 2366/// implicit conversion back to the result type done, then the assignment takes 2367/// place. This captures the intermediate type which the computation is done 2368/// in. 2369class CompoundAssignOperator : public BinaryOperator { 2370 QualType ComputationLHSType; 2371 QualType ComputationResultType; 2372public: 2373 CompoundAssignOperator(Expr *lhs, Expr *rhs, Opcode opc, 2374 QualType ResType, QualType CompLHSType, 2375 QualType CompResultType, 2376 SourceLocation OpLoc) 2377 : BinaryOperator(lhs, rhs, opc, ResType, OpLoc, true), 2378 ComputationLHSType(CompLHSType), 2379 ComputationResultType(CompResultType) { 2380 assert(isCompoundAssignmentOp() && 2381 "Only should be used for compound assignments"); 2382 } 2383 2384 /// \brief Build an empty compound assignment operator expression. 2385 explicit CompoundAssignOperator(EmptyShell Empty) 2386 : BinaryOperator(CompoundAssignOperatorClass, Empty) { } 2387 2388 // The two computation types are the type the LHS is converted 2389 // to for the computation and the type of the result; the two are 2390 // distinct in a few cases (specifically, int+=ptr and ptr-=ptr). 2391 QualType getComputationLHSType() const { return ComputationLHSType; } 2392 void setComputationLHSType(QualType T) { ComputationLHSType = T; } 2393 2394 QualType getComputationResultType() const { return ComputationResultType; } 2395 void setComputationResultType(QualType T) { ComputationResultType = T; } 2396 2397 static bool classof(const CompoundAssignOperator *) { return true; } 2398 static bool classof(const Stmt *S) { 2399 return S->getStmtClass() == CompoundAssignOperatorClass; 2400 } 2401}; 2402 2403/// ConditionalOperator - The ?: operator. Note that LHS may be null when the 2404/// GNU "missing LHS" extension is in use. 2405/// 2406class ConditionalOperator : public Expr { 2407 enum { COND, LHS, RHS, END_EXPR }; 2408 Stmt* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. 2409 Stmt* Save; 2410 SourceLocation QuestionLoc, ColonLoc; 2411public: 2412 ConditionalOperator(Expr *cond, SourceLocation QLoc, Expr *lhs, 2413 SourceLocation CLoc, Expr *rhs, Expr *save, QualType t) 2414 : Expr(ConditionalOperatorClass, t, 2415 // FIXME: the type of the conditional operator doesn't 2416 // depend on the type of the conditional, but the standard 2417 // seems to imply that it could. File a bug! 2418 ((lhs && lhs->isTypeDependent()) || (rhs && rhs->isTypeDependent())), 2419 (cond->isValueDependent() || 2420 (lhs && lhs->isValueDependent()) || 2421 (rhs && rhs->isValueDependent()))), 2422 QuestionLoc(QLoc), 2423 ColonLoc(CLoc) { 2424 SubExprs[COND] = cond; 2425 SubExprs[LHS] = lhs; 2426 SubExprs[RHS] = rhs; 2427 Save = save; 2428 } 2429 2430 /// \brief Build an empty conditional operator. 2431 explicit ConditionalOperator(EmptyShell Empty) 2432 : Expr(ConditionalOperatorClass, Empty) { } 2433 2434 // getCond - Return the expression representing the condition for 2435 // the ?: operator. 2436 Expr *getCond() const { return cast<Expr>(SubExprs[COND]); } 2437 void setCond(Expr *E) { SubExprs[COND] = E; } 2438 2439 // getTrueExpr - Return the subexpression representing the value of the ?: 2440 // expression if the condition evaluates to true. 2441 Expr *getTrueExpr() const { 2442 return cast<Expr>(!Save ? SubExprs[LHS] : SubExprs[COND]); 2443 } 2444 2445 // getFalseExpr - Return the subexpression representing the value of the ?: 2446 // expression if the condition evaluates to false. This is the same as getRHS. 2447 Expr *getFalseExpr() const { return cast<Expr>(SubExprs[RHS]); } 2448 2449 // getSaveExpr - In most cases this value will be null. Except a GCC extension 2450 // allows the left subexpression to be omitted, and instead of that condition 2451 // be returned. e.g: x ?: y is shorthand for x ? x : y, except that the 2452 // expression "x" is only evaluated once. Under this senario, this function 2453 // returns the original, non-converted condition expression for the ?:operator 2454 Expr *getSaveExpr() const { return Save? cast<Expr>(Save) : (Expr*)0; } 2455 2456 Expr *getLHS() const { return Save ? 0 : cast<Expr>(SubExprs[LHS]); } 2457 void setLHS(Expr *E) { SubExprs[LHS] = E; } 2458 2459 Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 2460 void setRHS(Expr *E) { SubExprs[RHS] = E; } 2461 2462 Expr *getSAVE() const { return Save? cast<Expr>(Save) : (Expr*)0; } 2463 void setSAVE(Expr *E) { Save = E; } 2464 2465 SourceLocation getQuestionLoc() const { return QuestionLoc; } 2466 void setQuestionLoc(SourceLocation L) { QuestionLoc = L; } 2467 2468 SourceLocation getColonLoc() const { return ColonLoc; } 2469 void setColonLoc(SourceLocation L) { ColonLoc = L; } 2470 2471 virtual SourceRange getSourceRange() const { 2472 return SourceRange(getCond()->getLocStart(), getRHS()->getLocEnd()); 2473 } 2474 static bool classof(const Stmt *T) { 2475 return T->getStmtClass() == ConditionalOperatorClass; 2476 } 2477 static bool classof(const ConditionalOperator *) { return true; } 2478 2479 // Iterators 2480 virtual child_iterator child_begin(); 2481 virtual child_iterator child_end(); 2482}; 2483 2484/// AddrLabelExpr - The GNU address of label extension, representing &&label. 2485class AddrLabelExpr : public Expr { 2486 SourceLocation AmpAmpLoc, LabelLoc; 2487 LabelStmt *Label; 2488public: 2489 AddrLabelExpr(SourceLocation AALoc, SourceLocation LLoc, LabelStmt *L, 2490 QualType t) 2491 : Expr(AddrLabelExprClass, t, false, false), 2492 AmpAmpLoc(AALoc), LabelLoc(LLoc), Label(L) {} 2493 2494 /// \brief Build an empty address of a label expression. 2495 explicit AddrLabelExpr(EmptyShell Empty) 2496 : Expr(AddrLabelExprClass, Empty) { } 2497 2498 SourceLocation getAmpAmpLoc() const { return AmpAmpLoc; } 2499 void setAmpAmpLoc(SourceLocation L) { AmpAmpLoc = L; } 2500 SourceLocation getLabelLoc() const { return LabelLoc; } 2501 void setLabelLoc(SourceLocation L) { LabelLoc = L; } 2502 2503 virtual SourceRange getSourceRange() const { 2504 return SourceRange(AmpAmpLoc, LabelLoc); 2505 } 2506 2507 LabelStmt *getLabel() const { return Label; } 2508 void setLabel(LabelStmt *S) { Label = S; } 2509 2510 static bool classof(const Stmt *T) { 2511 return T->getStmtClass() == AddrLabelExprClass; 2512 } 2513 static bool classof(const AddrLabelExpr *) { return true; } 2514 2515 // Iterators 2516 virtual child_iterator child_begin(); 2517 virtual child_iterator child_end(); 2518}; 2519 2520/// StmtExpr - This is the GNU Statement Expression extension: ({int X=4; X;}). 2521/// The StmtExpr contains a single CompoundStmt node, which it evaluates and 2522/// takes the value of the last subexpression. 2523class StmtExpr : public Expr { 2524 Stmt *SubStmt; 2525 SourceLocation LParenLoc, RParenLoc; 2526public: 2527 // FIXME: Does type-dependence need to be computed differently? 2528 StmtExpr(CompoundStmt *substmt, QualType T, 2529 SourceLocation lp, SourceLocation rp) : 2530 Expr(StmtExprClass, T, T->isDependentType(), false), 2531 SubStmt(substmt), LParenLoc(lp), RParenLoc(rp) { } 2532 2533 /// \brief Build an empty statement expression. 2534 explicit StmtExpr(EmptyShell Empty) : Expr(StmtExprClass, Empty) { } 2535 2536 CompoundStmt *getSubStmt() { return cast<CompoundStmt>(SubStmt); } 2537 const CompoundStmt *getSubStmt() const { return cast<CompoundStmt>(SubStmt); } 2538 void setSubStmt(CompoundStmt *S) { SubStmt = S; } 2539 2540 virtual SourceRange getSourceRange() const { 2541 return SourceRange(LParenLoc, RParenLoc); 2542 } 2543 2544 SourceLocation getLParenLoc() const { return LParenLoc; } 2545 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 2546 SourceLocation getRParenLoc() const { return RParenLoc; } 2547 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2548 2549 static bool classof(const Stmt *T) { 2550 return T->getStmtClass() == StmtExprClass; 2551 } 2552 static bool classof(const StmtExpr *) { return true; } 2553 2554 // Iterators 2555 virtual child_iterator child_begin(); 2556 virtual child_iterator child_end(); 2557}; 2558 2559/// TypesCompatibleExpr - GNU builtin-in function __builtin_types_compatible_p. 2560/// This AST node represents a function that returns 1 if two *types* (not 2561/// expressions) are compatible. The result of this built-in function can be 2562/// used in integer constant expressions. 2563class TypesCompatibleExpr : public Expr { 2564 TypeSourceInfo *TInfo1; 2565 TypeSourceInfo *TInfo2; 2566 SourceLocation BuiltinLoc, RParenLoc; 2567public: 2568 TypesCompatibleExpr(QualType ReturnType, SourceLocation BLoc, 2569 TypeSourceInfo *tinfo1, TypeSourceInfo *tinfo2, 2570 SourceLocation RP) : 2571 Expr(TypesCompatibleExprClass, ReturnType, false, false), 2572 TInfo1(tinfo1), TInfo2(tinfo2), BuiltinLoc(BLoc), RParenLoc(RP) {} 2573 2574 /// \brief Build an empty __builtin_type_compatible_p expression. 2575 explicit TypesCompatibleExpr(EmptyShell Empty) 2576 : Expr(TypesCompatibleExprClass, Empty) { } 2577 2578 TypeSourceInfo *getArgTInfo1() const { return TInfo1; } 2579 void setArgTInfo1(TypeSourceInfo *TInfo) { TInfo1 = TInfo; } 2580 TypeSourceInfo *getArgTInfo2() const { return TInfo2; } 2581 void setArgTInfo2(TypeSourceInfo *TInfo) { TInfo2 = TInfo; } 2582 2583 QualType getArgType1() const { return TInfo1->getType(); } 2584 QualType getArgType2() const { return TInfo2->getType(); } 2585 2586 SourceLocation getBuiltinLoc() const { return BuiltinLoc; } 2587 void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } 2588 2589 SourceLocation getRParenLoc() const { return RParenLoc; } 2590 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2591 2592 virtual SourceRange getSourceRange() const { 2593 return SourceRange(BuiltinLoc, RParenLoc); 2594 } 2595 static bool classof(const Stmt *T) { 2596 return T->getStmtClass() == TypesCompatibleExprClass; 2597 } 2598 static bool classof(const TypesCompatibleExpr *) { return true; } 2599 2600 // Iterators 2601 virtual child_iterator child_begin(); 2602 virtual child_iterator child_end(); 2603}; 2604 2605/// ShuffleVectorExpr - clang-specific builtin-in function 2606/// __builtin_shufflevector. 2607/// This AST node represents a operator that does a constant 2608/// shuffle, similar to LLVM's shufflevector instruction. It takes 2609/// two vectors and a variable number of constant indices, 2610/// and returns the appropriately shuffled vector. 2611class ShuffleVectorExpr : public Expr { 2612 SourceLocation BuiltinLoc, RParenLoc; 2613 2614 // SubExprs - the list of values passed to the __builtin_shufflevector 2615 // function. The first two are vectors, and the rest are constant 2616 // indices. The number of values in this list is always 2617 // 2+the number of indices in the vector type. 2618 Stmt **SubExprs; 2619 unsigned NumExprs; 2620 2621public: 2622 // FIXME: Can a shufflevector be value-dependent? Does type-dependence need 2623 // to be computed differently? 2624 ShuffleVectorExpr(ASTContext &C, Expr **args, unsigned nexpr, 2625 QualType Type, SourceLocation BLoc, 2626 SourceLocation RP) : 2627 Expr(ShuffleVectorExprClass, Type, Type->isDependentType(), false), 2628 BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(nexpr) { 2629 2630 SubExprs = new (C) Stmt*[nexpr]; 2631 for (unsigned i = 0; i < nexpr; i++) 2632 SubExprs[i] = args[i]; 2633 } 2634 2635 /// \brief Build an empty vector-shuffle expression. 2636 explicit ShuffleVectorExpr(EmptyShell Empty) 2637 : Expr(ShuffleVectorExprClass, Empty), SubExprs(0) { } 2638 2639 SourceLocation getBuiltinLoc() const { return BuiltinLoc; } 2640 void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } 2641 2642 SourceLocation getRParenLoc() const { return RParenLoc; } 2643 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2644 2645 virtual SourceRange getSourceRange() const { 2646 return SourceRange(BuiltinLoc, RParenLoc); 2647 } 2648 static bool classof(const Stmt *T) { 2649 return T->getStmtClass() == ShuffleVectorExprClass; 2650 } 2651 static bool classof(const ShuffleVectorExpr *) { return true; } 2652 2653 /// getNumSubExprs - Return the size of the SubExprs array. This includes the 2654 /// constant expression, the actual arguments passed in, and the function 2655 /// pointers. 2656 unsigned getNumSubExprs() const { return NumExprs; } 2657 2658 /// getExpr - Return the Expr at the specified index. 2659 Expr *getExpr(unsigned Index) { 2660 assert((Index < NumExprs) && "Arg access out of range!"); 2661 return cast<Expr>(SubExprs[Index]); 2662 } 2663 const Expr *getExpr(unsigned Index) const { 2664 assert((Index < NumExprs) && "Arg access out of range!"); 2665 return cast<Expr>(SubExprs[Index]); 2666 } 2667 2668 void setExprs(ASTContext &C, Expr ** Exprs, unsigned NumExprs); 2669 2670 unsigned getShuffleMaskIdx(ASTContext &Ctx, unsigned N) { 2671 assert((N < NumExprs - 2) && "Shuffle idx out of range!"); 2672 return getExpr(N+2)->EvaluateAsInt(Ctx).getZExtValue(); 2673 } 2674 2675 // Iterators 2676 virtual child_iterator child_begin(); 2677 virtual child_iterator child_end(); 2678}; 2679 2680/// ChooseExpr - GNU builtin-in function __builtin_choose_expr. 2681/// This AST node is similar to the conditional operator (?:) in C, with 2682/// the following exceptions: 2683/// - the test expression must be a integer constant expression. 2684/// - the expression returned acts like the chosen subexpression in every 2685/// visible way: the type is the same as that of the chosen subexpression, 2686/// and all predicates (whether it's an l-value, whether it's an integer 2687/// constant expression, etc.) return the same result as for the chosen 2688/// sub-expression. 2689class ChooseExpr : public Expr { 2690 enum { COND, LHS, RHS, END_EXPR }; 2691 Stmt* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. 2692 SourceLocation BuiltinLoc, RParenLoc; 2693public: 2694 ChooseExpr(SourceLocation BLoc, Expr *cond, Expr *lhs, Expr *rhs, QualType t, 2695 SourceLocation RP, bool TypeDependent, bool ValueDependent) 2696 : Expr(ChooseExprClass, t, TypeDependent, ValueDependent), 2697 BuiltinLoc(BLoc), RParenLoc(RP) { 2698 SubExprs[COND] = cond; 2699 SubExprs[LHS] = lhs; 2700 SubExprs[RHS] = rhs; 2701 } 2702 2703 /// \brief Build an empty __builtin_choose_expr. 2704 explicit ChooseExpr(EmptyShell Empty) : Expr(ChooseExprClass, Empty) { } 2705 2706 /// isConditionTrue - Return whether the condition is true (i.e. not 2707 /// equal to zero). 2708 bool isConditionTrue(ASTContext &C) const; 2709 2710 /// getChosenSubExpr - Return the subexpression chosen according to the 2711 /// condition. 2712 Expr *getChosenSubExpr(ASTContext &C) const { 2713 return isConditionTrue(C) ? getLHS() : getRHS(); 2714 } 2715 2716 Expr *getCond() const { return cast<Expr>(SubExprs[COND]); } 2717 void setCond(Expr *E) { SubExprs[COND] = E; } 2718 Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } 2719 void setLHS(Expr *E) { SubExprs[LHS] = E; } 2720 Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 2721 void setRHS(Expr *E) { SubExprs[RHS] = E; } 2722 2723 SourceLocation getBuiltinLoc() const { return BuiltinLoc; } 2724 void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } 2725 2726 SourceLocation getRParenLoc() const { return RParenLoc; } 2727 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2728 2729 virtual SourceRange getSourceRange() const { 2730 return SourceRange(BuiltinLoc, RParenLoc); 2731 } 2732 static bool classof(const Stmt *T) { 2733 return T->getStmtClass() == ChooseExprClass; 2734 } 2735 static bool classof(const ChooseExpr *) { return true; } 2736 2737 // Iterators 2738 virtual child_iterator child_begin(); 2739 virtual child_iterator child_end(); 2740}; 2741 2742/// GNUNullExpr - Implements the GNU __null extension, which is a name 2743/// for a null pointer constant that has integral type (e.g., int or 2744/// long) and is the same size and alignment as a pointer. The __null 2745/// extension is typically only used by system headers, which define 2746/// NULL as __null in C++ rather than using 0 (which is an integer 2747/// that may not match the size of a pointer). 2748class GNUNullExpr : public Expr { 2749 /// TokenLoc - The location of the __null keyword. 2750 SourceLocation TokenLoc; 2751 2752public: 2753 GNUNullExpr(QualType Ty, SourceLocation Loc) 2754 : Expr(GNUNullExprClass, Ty, false, false), TokenLoc(Loc) { } 2755 2756 /// \brief Build an empty GNU __null expression. 2757 explicit GNUNullExpr(EmptyShell Empty) : Expr(GNUNullExprClass, Empty) { } 2758 2759 /// getTokenLocation - The location of the __null token. 2760 SourceLocation getTokenLocation() const { return TokenLoc; } 2761 void setTokenLocation(SourceLocation L) { TokenLoc = L; } 2762 2763 virtual SourceRange getSourceRange() const { 2764 return SourceRange(TokenLoc); 2765 } 2766 static bool classof(const Stmt *T) { 2767 return T->getStmtClass() == GNUNullExprClass; 2768 } 2769 static bool classof(const GNUNullExpr *) { return true; } 2770 2771 // Iterators 2772 virtual child_iterator child_begin(); 2773 virtual child_iterator child_end(); 2774}; 2775 2776/// VAArgExpr, used for the builtin function __builtin_va_arg. 2777class VAArgExpr : public Expr { 2778 Stmt *Val; 2779 TypeSourceInfo *TInfo; 2780 SourceLocation BuiltinLoc, RParenLoc; 2781public: 2782 VAArgExpr(SourceLocation BLoc, Expr* e, TypeSourceInfo *TInfo, 2783 SourceLocation RPLoc, QualType t) 2784 : Expr(VAArgExprClass, t, t->isDependentType(), false), 2785 Val(e), TInfo(TInfo), 2786 BuiltinLoc(BLoc), 2787 RParenLoc(RPLoc) { } 2788 2789 /// \brief Create an empty __builtin_va_arg expression. 2790 explicit VAArgExpr(EmptyShell Empty) : Expr(VAArgExprClass, Empty) { } 2791 2792 const Expr *getSubExpr() const { return cast<Expr>(Val); } 2793 Expr *getSubExpr() { return cast<Expr>(Val); } 2794 void setSubExpr(Expr *E) { Val = E; } 2795 2796 TypeSourceInfo *getWrittenTypeInfo() const { return TInfo; } 2797 void setWrittenTypeInfo(TypeSourceInfo *TI) { TInfo = TI; } 2798 2799 SourceLocation getBuiltinLoc() const { return BuiltinLoc; } 2800 void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } 2801 2802 SourceLocation getRParenLoc() const { return RParenLoc; } 2803 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2804 2805 virtual SourceRange getSourceRange() const { 2806 return SourceRange(BuiltinLoc, RParenLoc); 2807 } 2808 static bool classof(const Stmt *T) { 2809 return T->getStmtClass() == VAArgExprClass; 2810 } 2811 static bool classof(const VAArgExpr *) { return true; } 2812 2813 // Iterators 2814 virtual child_iterator child_begin(); 2815 virtual child_iterator child_end(); 2816}; 2817 2818/// @brief Describes an C or C++ initializer list. 2819/// 2820/// InitListExpr describes an initializer list, which can be used to 2821/// initialize objects of different types, including 2822/// struct/class/union types, arrays, and vectors. For example: 2823/// 2824/// @code 2825/// struct foo x = { 1, { 2, 3 } }; 2826/// @endcode 2827/// 2828/// Prior to semantic analysis, an initializer list will represent the 2829/// initializer list as written by the user, but will have the 2830/// placeholder type "void". This initializer list is called the 2831/// syntactic form of the initializer, and may contain C99 designated 2832/// initializers (represented as DesignatedInitExprs), initializations 2833/// of subobject members without explicit braces, and so on. Clients 2834/// interested in the original syntax of the initializer list should 2835/// use the syntactic form of the initializer list. 2836/// 2837/// After semantic analysis, the initializer list will represent the 2838/// semantic form of the initializer, where the initializations of all 2839/// subobjects are made explicit with nested InitListExpr nodes and 2840/// C99 designators have been eliminated by placing the designated 2841/// initializations into the subobject they initialize. Additionally, 2842/// any "holes" in the initialization, where no initializer has been 2843/// specified for a particular subobject, will be replaced with 2844/// implicitly-generated ImplicitValueInitExpr expressions that 2845/// value-initialize the subobjects. Note, however, that the 2846/// initializer lists may still have fewer initializers than there are 2847/// elements to initialize within the object. 2848/// 2849/// Given the semantic form of the initializer list, one can retrieve 2850/// the original syntactic form of that initializer list (if it 2851/// exists) using getSyntacticForm(). Since many initializer lists 2852/// have the same syntactic and semantic forms, getSyntacticForm() may 2853/// return NULL, indicating that the current initializer list also 2854/// serves as its syntactic form. 2855class InitListExpr : public Expr { 2856 // FIXME: Eliminate this vector in favor of ASTContext allocation 2857 typedef ASTVector<Stmt *> InitExprsTy; 2858 InitExprsTy InitExprs; 2859 SourceLocation LBraceLoc, RBraceLoc; 2860 2861 /// Contains the initializer list that describes the syntactic form 2862 /// written in the source code. 2863 InitListExpr *SyntacticForm; 2864 2865 /// If this initializer list initializes a union, specifies which 2866 /// field within the union will be initialized. 2867 FieldDecl *UnionFieldInit; 2868 2869 /// Whether this initializer list originally had a GNU array-range 2870 /// designator in it. This is a temporary marker used by CodeGen. 2871 bool HadArrayRangeDesignator; 2872 2873public: 2874 InitListExpr(ASTContext &C, SourceLocation lbraceloc, 2875 Expr **initexprs, unsigned numinits, 2876 SourceLocation rbraceloc); 2877 2878 /// \brief Build an empty initializer list. 2879 explicit InitListExpr(ASTContext &C, EmptyShell Empty) 2880 : Expr(InitListExprClass, Empty), InitExprs(C) { } 2881 2882 unsigned getNumInits() const { return InitExprs.size(); } 2883 2884 const Expr* getInit(unsigned Init) const { 2885 assert(Init < getNumInits() && "Initializer access out of range!"); 2886 return cast_or_null<Expr>(InitExprs[Init]); 2887 } 2888 2889 Expr* getInit(unsigned Init) { 2890 assert(Init < getNumInits() && "Initializer access out of range!"); 2891 return cast_or_null<Expr>(InitExprs[Init]); 2892 } 2893 2894 void setInit(unsigned Init, Expr *expr) { 2895 assert(Init < getNumInits() && "Initializer access out of range!"); 2896 InitExprs[Init] = expr; 2897 } 2898 2899 /// \brief Reserve space for some number of initializers. 2900 void reserveInits(ASTContext &C, unsigned NumInits); 2901 2902 /// @brief Specify the number of initializers 2903 /// 2904 /// If there are more than @p NumInits initializers, the remaining 2905 /// initializers will be destroyed. If there are fewer than @p 2906 /// NumInits initializers, NULL expressions will be added for the 2907 /// unknown initializers. 2908 void resizeInits(ASTContext &Context, unsigned NumInits); 2909 2910 /// @brief Updates the initializer at index @p Init with the new 2911 /// expression @p expr, and returns the old expression at that 2912 /// location. 2913 /// 2914 /// When @p Init is out of range for this initializer list, the 2915 /// initializer list will be extended with NULL expressions to 2916 /// accomodate the new entry. 2917 Expr *updateInit(ASTContext &C, unsigned Init, Expr *expr); 2918 2919 /// \brief If this initializes a union, specifies which field in the 2920 /// union to initialize. 2921 /// 2922 /// Typically, this field is the first named field within the 2923 /// union. However, a designated initializer can specify the 2924 /// initialization of a different field within the union. 2925 FieldDecl *getInitializedFieldInUnion() { return UnionFieldInit; } 2926 void setInitializedFieldInUnion(FieldDecl *FD) { UnionFieldInit = FD; } 2927 2928 // Explicit InitListExpr's originate from source code (and have valid source 2929 // locations). Implicit InitListExpr's are created by the semantic analyzer. 2930 bool isExplicit() { 2931 return LBraceLoc.isValid() && RBraceLoc.isValid(); 2932 } 2933 2934 SourceLocation getLBraceLoc() const { return LBraceLoc; } 2935 void setLBraceLoc(SourceLocation Loc) { LBraceLoc = Loc; } 2936 SourceLocation getRBraceLoc() const { return RBraceLoc; } 2937 void setRBraceLoc(SourceLocation Loc) { RBraceLoc = Loc; } 2938 2939 /// @brief Retrieve the initializer list that describes the 2940 /// syntactic form of the initializer. 2941 /// 2942 /// 2943 InitListExpr *getSyntacticForm() const { return SyntacticForm; } 2944 void setSyntacticForm(InitListExpr *Init) { SyntacticForm = Init; } 2945 2946 bool hadArrayRangeDesignator() const { return HadArrayRangeDesignator; } 2947 void sawArrayRangeDesignator(bool ARD = true) { 2948 HadArrayRangeDesignator = ARD; 2949 } 2950 2951 virtual SourceRange getSourceRange() const { 2952 return SourceRange(LBraceLoc, RBraceLoc); 2953 } 2954 static bool classof(const Stmt *T) { 2955 return T->getStmtClass() == InitListExprClass; 2956 } 2957 static bool classof(const InitListExpr *) { return true; } 2958 2959 // Iterators 2960 virtual child_iterator child_begin(); 2961 virtual child_iterator child_end(); 2962 2963 typedef InitExprsTy::iterator iterator; 2964 typedef InitExprsTy::const_iterator const_iterator; 2965 typedef InitExprsTy::reverse_iterator reverse_iterator; 2966 typedef InitExprsTy::const_reverse_iterator const_reverse_iterator; 2967 2968 iterator begin() { return InitExprs.begin(); } 2969 const_iterator begin() const { return InitExprs.begin(); } 2970 iterator end() { return InitExprs.end(); } 2971 const_iterator end() const { return InitExprs.end(); } 2972 reverse_iterator rbegin() { return InitExprs.rbegin(); } 2973 const_reverse_iterator rbegin() const { return InitExprs.rbegin(); } 2974 reverse_iterator rend() { return InitExprs.rend(); } 2975 const_reverse_iterator rend() const { return InitExprs.rend(); } 2976}; 2977 2978/// @brief Represents a C99 designated initializer expression. 2979/// 2980/// A designated initializer expression (C99 6.7.8) contains one or 2981/// more designators (which can be field designators, array 2982/// designators, or GNU array-range designators) followed by an 2983/// expression that initializes the field or element(s) that the 2984/// designators refer to. For example, given: 2985/// 2986/// @code 2987/// struct point { 2988/// double x; 2989/// double y; 2990/// }; 2991/// struct point ptarray[10] = { [2].y = 1.0, [2].x = 2.0, [0].x = 1.0 }; 2992/// @endcode 2993/// 2994/// The InitListExpr contains three DesignatedInitExprs, the first of 2995/// which covers @c [2].y=1.0. This DesignatedInitExpr will have two 2996/// designators, one array designator for @c [2] followed by one field 2997/// designator for @c .y. The initalization expression will be 1.0. 2998class DesignatedInitExpr : public Expr { 2999public: 3000 /// \brief Forward declaration of the Designator class. 3001 class Designator; 3002 3003private: 3004 /// The location of the '=' or ':' prior to the actual initializer 3005 /// expression. 3006 SourceLocation EqualOrColonLoc; 3007 3008 /// Whether this designated initializer used the GNU deprecated 3009 /// syntax rather than the C99 '=' syntax. 3010 bool GNUSyntax : 1; 3011 3012 /// The number of designators in this initializer expression. 3013 unsigned NumDesignators : 15; 3014 3015 /// \brief The designators in this designated initialization 3016 /// expression. 3017 Designator *Designators; 3018 3019 /// The number of subexpressions of this initializer expression, 3020 /// which contains both the initializer and any additional 3021 /// expressions used by array and array-range designators. 3022 unsigned NumSubExprs : 16; 3023 3024 3025 DesignatedInitExpr(ASTContext &C, QualType Ty, unsigned NumDesignators, 3026 const Designator *Designators, 3027 SourceLocation EqualOrColonLoc, bool GNUSyntax, 3028 Expr **IndexExprs, unsigned NumIndexExprs, 3029 Expr *Init); 3030 3031 explicit DesignatedInitExpr(unsigned NumSubExprs) 3032 : Expr(DesignatedInitExprClass, EmptyShell()), 3033 NumDesignators(0), Designators(0), NumSubExprs(NumSubExprs) { } 3034 3035public: 3036 /// A field designator, e.g., ".x". 3037 struct FieldDesignator { 3038 /// Refers to the field that is being initialized. The low bit 3039 /// of this field determines whether this is actually a pointer 3040 /// to an IdentifierInfo (if 1) or a FieldDecl (if 0). When 3041 /// initially constructed, a field designator will store an 3042 /// IdentifierInfo*. After semantic analysis has resolved that 3043 /// name, the field designator will instead store a FieldDecl*. 3044 uintptr_t NameOrField; 3045 3046 /// The location of the '.' in the designated initializer. 3047 unsigned DotLoc; 3048 3049 /// The location of the field name in the designated initializer. 3050 unsigned FieldLoc; 3051 }; 3052 3053 /// An array or GNU array-range designator, e.g., "[9]" or "[10..15]". 3054 struct ArrayOrRangeDesignator { 3055 /// Location of the first index expression within the designated 3056 /// initializer expression's list of subexpressions. 3057 unsigned Index; 3058 /// The location of the '[' starting the array range designator. 3059 unsigned LBracketLoc; 3060 /// The location of the ellipsis separating the start and end 3061 /// indices. Only valid for GNU array-range designators. 3062 unsigned EllipsisLoc; 3063 /// The location of the ']' terminating the array range designator. 3064 unsigned RBracketLoc; 3065 }; 3066 3067 /// @brief Represents a single C99 designator. 3068 /// 3069 /// @todo This class is infuriatingly similar to clang::Designator, 3070 /// but minor differences (storing indices vs. storing pointers) 3071 /// keep us from reusing it. Try harder, later, to rectify these 3072 /// differences. 3073 class Designator { 3074 /// @brief The kind of designator this describes. 3075 enum { 3076 FieldDesignator, 3077 ArrayDesignator, 3078 ArrayRangeDesignator 3079 } Kind; 3080 3081 union { 3082 /// A field designator, e.g., ".x". 3083 struct FieldDesignator Field; 3084 /// An array or GNU array-range designator, e.g., "[9]" or "[10..15]". 3085 struct ArrayOrRangeDesignator ArrayOrRange; 3086 }; 3087 friend class DesignatedInitExpr; 3088 3089 public: 3090 Designator() {} 3091 3092 /// @brief Initializes a field designator. 3093 Designator(const IdentifierInfo *FieldName, SourceLocation DotLoc, 3094 SourceLocation FieldLoc) 3095 : Kind(FieldDesignator) { 3096 Field.NameOrField = reinterpret_cast<uintptr_t>(FieldName) | 0x01; 3097 Field.DotLoc = DotLoc.getRawEncoding(); 3098 Field.FieldLoc = FieldLoc.getRawEncoding(); 3099 } 3100 3101 /// @brief Initializes an array designator. 3102 Designator(unsigned Index, SourceLocation LBracketLoc, 3103 SourceLocation RBracketLoc) 3104 : Kind(ArrayDesignator) { 3105 ArrayOrRange.Index = Index; 3106 ArrayOrRange.LBracketLoc = LBracketLoc.getRawEncoding(); 3107 ArrayOrRange.EllipsisLoc = SourceLocation().getRawEncoding(); 3108 ArrayOrRange.RBracketLoc = RBracketLoc.getRawEncoding(); 3109 } 3110 3111 /// @brief Initializes a GNU array-range designator. 3112 Designator(unsigned Index, SourceLocation LBracketLoc, 3113 SourceLocation EllipsisLoc, SourceLocation RBracketLoc) 3114 : Kind(ArrayRangeDesignator) { 3115 ArrayOrRange.Index = Index; 3116 ArrayOrRange.LBracketLoc = LBracketLoc.getRawEncoding(); 3117 ArrayOrRange.EllipsisLoc = EllipsisLoc.getRawEncoding(); 3118 ArrayOrRange.RBracketLoc = RBracketLoc.getRawEncoding(); 3119 } 3120 3121 bool isFieldDesignator() const { return Kind == FieldDesignator; } 3122 bool isArrayDesignator() const { return Kind == ArrayDesignator; } 3123 bool isArrayRangeDesignator() const { return Kind == ArrayRangeDesignator; } 3124 3125 IdentifierInfo * getFieldName(); 3126 3127 FieldDecl *getField() { 3128 assert(Kind == FieldDesignator && "Only valid on a field designator"); 3129 if (Field.NameOrField & 0x01) 3130 return 0; 3131 else 3132 return reinterpret_cast<FieldDecl *>(Field.NameOrField); 3133 } 3134 3135 void setField(FieldDecl *FD) { 3136 assert(Kind == FieldDesignator && "Only valid on a field designator"); 3137 Field.NameOrField = reinterpret_cast<uintptr_t>(FD); 3138 } 3139 3140 SourceLocation getDotLoc() const { 3141 assert(Kind == FieldDesignator && "Only valid on a field designator"); 3142 return SourceLocation::getFromRawEncoding(Field.DotLoc); 3143 } 3144 3145 SourceLocation getFieldLoc() const { 3146 assert(Kind == FieldDesignator && "Only valid on a field designator"); 3147 return SourceLocation::getFromRawEncoding(Field.FieldLoc); 3148 } 3149 3150 SourceLocation getLBracketLoc() const { 3151 assert((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && 3152 "Only valid on an array or array-range designator"); 3153 return SourceLocation::getFromRawEncoding(ArrayOrRange.LBracketLoc); 3154 } 3155 3156 SourceLocation getRBracketLoc() const { 3157 assert((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && 3158 "Only valid on an array or array-range designator"); 3159 return SourceLocation::getFromRawEncoding(ArrayOrRange.RBracketLoc); 3160 } 3161 3162 SourceLocation getEllipsisLoc() const { 3163 assert(Kind == ArrayRangeDesignator && 3164 "Only valid on an array-range designator"); 3165 return SourceLocation::getFromRawEncoding(ArrayOrRange.EllipsisLoc); 3166 } 3167 3168 unsigned getFirstExprIndex() const { 3169 assert((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && 3170 "Only valid on an array or array-range designator"); 3171 return ArrayOrRange.Index; 3172 } 3173 3174 SourceLocation getStartLocation() const { 3175 if (Kind == FieldDesignator) 3176 return getDotLoc().isInvalid()? getFieldLoc() : getDotLoc(); 3177 else 3178 return getLBracketLoc(); 3179 } 3180 }; 3181 3182 static DesignatedInitExpr *Create(ASTContext &C, Designator *Designators, 3183 unsigned NumDesignators, 3184 Expr **IndexExprs, unsigned NumIndexExprs, 3185 SourceLocation EqualOrColonLoc, 3186 bool GNUSyntax, Expr *Init); 3187 3188 static DesignatedInitExpr *CreateEmpty(ASTContext &C, unsigned NumIndexExprs); 3189 3190 /// @brief Returns the number of designators in this initializer. 3191 unsigned size() const { return NumDesignators; } 3192 3193 // Iterator access to the designators. 3194 typedef Designator* designators_iterator; 3195 designators_iterator designators_begin() { return Designators; } 3196 designators_iterator designators_end() { 3197 return Designators + NumDesignators; 3198 } 3199 3200 Designator *getDesignator(unsigned Idx) { return &designators_begin()[Idx]; } 3201 3202 void setDesignators(ASTContext &C, const Designator *Desigs, 3203 unsigned NumDesigs); 3204 3205 Expr *getArrayIndex(const Designator& D); 3206 Expr *getArrayRangeStart(const Designator& D); 3207 Expr *getArrayRangeEnd(const Designator& D); 3208 3209 /// @brief Retrieve the location of the '=' that precedes the 3210 /// initializer value itself, if present. 3211 SourceLocation getEqualOrColonLoc() const { return EqualOrColonLoc; } 3212 void setEqualOrColonLoc(SourceLocation L) { EqualOrColonLoc = L; } 3213 3214 /// @brief Determines whether this designated initializer used the 3215 /// deprecated GNU syntax for designated initializers. 3216 bool usesGNUSyntax() const { return GNUSyntax; } 3217 void setGNUSyntax(bool GNU) { GNUSyntax = GNU; } 3218 3219 /// @brief Retrieve the initializer value. 3220 Expr *getInit() const { 3221 return cast<Expr>(*const_cast<DesignatedInitExpr*>(this)->child_begin()); 3222 } 3223 3224 void setInit(Expr *init) { 3225 *child_begin() = init; 3226 } 3227 3228 /// \brief Retrieve the total number of subexpressions in this 3229 /// designated initializer expression, including the actual 3230 /// initialized value and any expressions that occur within array 3231 /// and array-range designators. 3232 unsigned getNumSubExprs() const { return NumSubExprs; } 3233 3234 Expr *getSubExpr(unsigned Idx) { 3235 assert(Idx < NumSubExprs && "Subscript out of range"); 3236 char* Ptr = static_cast<char*>(static_cast<void *>(this)); 3237 Ptr += sizeof(DesignatedInitExpr); 3238 return reinterpret_cast<Expr**>(reinterpret_cast<void**>(Ptr))[Idx]; 3239 } 3240 3241 void setSubExpr(unsigned Idx, Expr *E) { 3242 assert(Idx < NumSubExprs && "Subscript out of range"); 3243 char* Ptr = static_cast<char*>(static_cast<void *>(this)); 3244 Ptr += sizeof(DesignatedInitExpr); 3245 reinterpret_cast<Expr**>(reinterpret_cast<void**>(Ptr))[Idx] = E; 3246 } 3247 3248 /// \brief Replaces the designator at index @p Idx with the series 3249 /// of designators in [First, Last). 3250 void ExpandDesignator(ASTContext &C, unsigned Idx, const Designator *First, 3251 const Designator *Last); 3252 3253 virtual SourceRange getSourceRange() const; 3254 3255 static bool classof(const Stmt *T) { 3256 return T->getStmtClass() == DesignatedInitExprClass; 3257 } 3258 static bool classof(const DesignatedInitExpr *) { return true; } 3259 3260 // Iterators 3261 virtual child_iterator child_begin(); 3262 virtual child_iterator child_end(); 3263}; 3264 3265/// \brief Represents an implicitly-generated value initialization of 3266/// an object of a given type. 3267/// 3268/// Implicit value initializations occur within semantic initializer 3269/// list expressions (InitListExpr) as placeholders for subobject 3270/// initializations not explicitly specified by the user. 3271/// 3272/// \see InitListExpr 3273class ImplicitValueInitExpr : public Expr { 3274public: 3275 explicit ImplicitValueInitExpr(QualType ty) 3276 : Expr(ImplicitValueInitExprClass, ty, false, false) { } 3277 3278 /// \brief Construct an empty implicit value initialization. 3279 explicit ImplicitValueInitExpr(EmptyShell Empty) 3280 : Expr(ImplicitValueInitExprClass, Empty) { } 3281 3282 static bool classof(const Stmt *T) { 3283 return T->getStmtClass() == ImplicitValueInitExprClass; 3284 } 3285 static bool classof(const ImplicitValueInitExpr *) { return true; } 3286 3287 virtual SourceRange getSourceRange() const { 3288 return SourceRange(); 3289 } 3290 3291 // Iterators 3292 virtual child_iterator child_begin(); 3293 virtual child_iterator child_end(); 3294}; 3295 3296 3297class ParenListExpr : public Expr { 3298 Stmt **Exprs; 3299 unsigned NumExprs; 3300 SourceLocation LParenLoc, RParenLoc; 3301 3302public: 3303 ParenListExpr(ASTContext& C, SourceLocation lparenloc, Expr **exprs, 3304 unsigned numexprs, SourceLocation rparenloc); 3305 3306 /// \brief Build an empty paren list. 3307 explicit ParenListExpr(EmptyShell Empty) : Expr(ParenListExprClass, Empty) { } 3308 3309 unsigned getNumExprs() const { return NumExprs; } 3310 3311 const Expr* getExpr(unsigned Init) const { 3312 assert(Init < getNumExprs() && "Initializer access out of range!"); 3313 return cast_or_null<Expr>(Exprs[Init]); 3314 } 3315 3316 Expr* getExpr(unsigned Init) { 3317 assert(Init < getNumExprs() && "Initializer access out of range!"); 3318 return cast_or_null<Expr>(Exprs[Init]); 3319 } 3320 3321 Expr **getExprs() { return reinterpret_cast<Expr **>(Exprs); } 3322 3323 SourceLocation getLParenLoc() const { return LParenLoc; } 3324 SourceLocation getRParenLoc() const { return RParenLoc; } 3325 3326 virtual SourceRange getSourceRange() const { 3327 return SourceRange(LParenLoc, RParenLoc); 3328 } 3329 static bool classof(const Stmt *T) { 3330 return T->getStmtClass() == ParenListExprClass; 3331 } 3332 static bool classof(const ParenListExpr *) { return true; } 3333 3334 // Iterators 3335 virtual child_iterator child_begin(); 3336 virtual child_iterator child_end(); 3337 3338 friend class ASTStmtReader; 3339 friend class ASTStmtWriter; 3340}; 3341 3342 3343//===----------------------------------------------------------------------===// 3344// Clang Extensions 3345//===----------------------------------------------------------------------===// 3346 3347 3348/// ExtVectorElementExpr - This represents access to specific elements of a 3349/// vector, and may occur on the left hand side or right hand side. For example 3350/// the following is legal: "V.xy = V.zw" if V is a 4 element extended vector. 3351/// 3352/// Note that the base may have either vector or pointer to vector type, just 3353/// like a struct field reference. 3354/// 3355class ExtVectorElementExpr : public Expr { 3356 Stmt *Base; 3357 IdentifierInfo *Accessor; 3358 SourceLocation AccessorLoc; 3359public: 3360 ExtVectorElementExpr(QualType ty, Expr *base, IdentifierInfo &accessor, 3361 SourceLocation loc) 3362 : Expr(ExtVectorElementExprClass, ty, base->isTypeDependent(), 3363 base->isValueDependent()), 3364 Base(base), Accessor(&accessor), AccessorLoc(loc) {} 3365 3366 /// \brief Build an empty vector element expression. 3367 explicit ExtVectorElementExpr(EmptyShell Empty) 3368 : Expr(ExtVectorElementExprClass, Empty) { } 3369 3370 const Expr *getBase() const { return cast<Expr>(Base); } 3371 Expr *getBase() { return cast<Expr>(Base); } 3372 void setBase(Expr *E) { Base = E; } 3373 3374 IdentifierInfo &getAccessor() const { return *Accessor; } 3375 void setAccessor(IdentifierInfo *II) { Accessor = II; } 3376 3377 SourceLocation getAccessorLoc() const { return AccessorLoc; } 3378 void setAccessorLoc(SourceLocation L) { AccessorLoc = L; } 3379 3380 /// getNumElements - Get the number of components being selected. 3381 unsigned getNumElements() const; 3382 3383 /// containsDuplicateElements - Return true if any element access is 3384 /// repeated. 3385 bool containsDuplicateElements() const; 3386 3387 /// getEncodedElementAccess - Encode the elements accessed into an llvm 3388 /// aggregate Constant of ConstantInt(s). 3389 void getEncodedElementAccess(llvm::SmallVectorImpl<unsigned> &Elts) const; 3390 3391 virtual SourceRange getSourceRange() const { 3392 return SourceRange(getBase()->getLocStart(), AccessorLoc); 3393 } 3394 3395 /// isArrow - Return true if the base expression is a pointer to vector, 3396 /// return false if the base expression is a vector. 3397 bool isArrow() const; 3398 3399 static bool classof(const Stmt *T) { 3400 return T->getStmtClass() == ExtVectorElementExprClass; 3401 } 3402 static bool classof(const ExtVectorElementExpr *) { return true; } 3403 3404 // Iterators 3405 virtual child_iterator child_begin(); 3406 virtual child_iterator child_end(); 3407}; 3408 3409 3410/// BlockExpr - Adaptor class for mixing a BlockDecl with expressions. 3411/// ^{ statement-body } or ^(int arg1, float arg2){ statement-body } 3412class BlockExpr : public Expr { 3413protected: 3414 BlockDecl *TheBlock; 3415 bool HasBlockDeclRefExprs; 3416public: 3417 BlockExpr(BlockDecl *BD, QualType ty, bool hasBlockDeclRefExprs) 3418 : Expr(BlockExprClass, ty, ty->isDependentType(), false), 3419 TheBlock(BD), HasBlockDeclRefExprs(hasBlockDeclRefExprs) {} 3420 3421 /// \brief Build an empty block expression. 3422 explicit BlockExpr(EmptyShell Empty) : Expr(BlockExprClass, Empty) { } 3423 3424 const BlockDecl *getBlockDecl() const { return TheBlock; } 3425 BlockDecl *getBlockDecl() { return TheBlock; } 3426 void setBlockDecl(BlockDecl *BD) { TheBlock = BD; } 3427 3428 // Convenience functions for probing the underlying BlockDecl. 3429 SourceLocation getCaretLocation() const; 3430 const Stmt *getBody() const; 3431 Stmt *getBody(); 3432 3433 virtual SourceRange getSourceRange() const { 3434 return SourceRange(getCaretLocation(), getBody()->getLocEnd()); 3435 } 3436 3437 /// getFunctionType - Return the underlying function type for this block. 3438 const FunctionType *getFunctionType() const; 3439 3440 /// hasBlockDeclRefExprs - Return true iff the block has BlockDeclRefExpr 3441 /// inside of the block that reference values outside the block. 3442 bool hasBlockDeclRefExprs() const { return HasBlockDeclRefExprs; } 3443 void setHasBlockDeclRefExprs(bool BDRE) { HasBlockDeclRefExprs = BDRE; } 3444 3445 static bool classof(const Stmt *T) { 3446 return T->getStmtClass() == BlockExprClass; 3447 } 3448 static bool classof(const BlockExpr *) { return true; } 3449 3450 // Iterators 3451 virtual child_iterator child_begin(); 3452 virtual child_iterator child_end(); 3453}; 3454 3455/// BlockDeclRefExpr - A reference to a declared variable, function, 3456/// enum, etc. 3457class BlockDeclRefExpr : public Expr { 3458 ValueDecl *D; 3459 SourceLocation Loc; 3460 bool IsByRef : 1; 3461 bool ConstQualAdded : 1; 3462 Stmt *CopyConstructorVal; 3463public: 3464 // FIXME: Fix type/value dependence! 3465 BlockDeclRefExpr(ValueDecl *d, QualType t, SourceLocation l, bool ByRef, 3466 bool constAdded = false, 3467 Stmt *copyConstructorVal = 0) 3468 : Expr(BlockDeclRefExprClass, t, (!t.isNull() && t->isDependentType()),false), 3469 D(d), Loc(l), IsByRef(ByRef), 3470 ConstQualAdded(constAdded), CopyConstructorVal(copyConstructorVal) {} 3471 3472 // \brief Build an empty reference to a declared variable in a 3473 // block. 3474 explicit BlockDeclRefExpr(EmptyShell Empty) 3475 : Expr(BlockDeclRefExprClass, Empty) { } 3476 3477 ValueDecl *getDecl() { return D; } 3478 const ValueDecl *getDecl() const { return D; } 3479 void setDecl(ValueDecl *VD) { D = VD; } 3480 3481 SourceLocation getLocation() const { return Loc; } 3482 void setLocation(SourceLocation L) { Loc = L; } 3483 3484 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 3485 3486 bool isByRef() const { return IsByRef; } 3487 void setByRef(bool BR) { IsByRef = BR; } 3488 3489 bool isConstQualAdded() const { return ConstQualAdded; } 3490 void setConstQualAdded(bool C) { ConstQualAdded = C; } 3491 3492 const Expr *getCopyConstructorExpr() const 3493 { return cast_or_null<Expr>(CopyConstructorVal); } 3494 Expr *getCopyConstructorExpr() 3495 { return cast_or_null<Expr>(CopyConstructorVal); } 3496 void setCopyConstructorExpr(Expr *E) { CopyConstructorVal = E; } 3497 3498 static bool classof(const Stmt *T) { 3499 return T->getStmtClass() == BlockDeclRefExprClass; 3500 } 3501 static bool classof(const BlockDeclRefExpr *) { return true; } 3502 3503 // Iterators 3504 virtual child_iterator child_begin(); 3505 virtual child_iterator child_end(); 3506}; 3507 3508} // end namespace clang 3509 3510#endif 3511