Expr.h revision 16c5dea6c2d3e4cf529de9d9b37f6a40441acb2c
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//===--- Expr.h - Classes for representing expressions ----------*- C++ -*-===// 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The LLVM Compiler Infrastructure 4c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This file is distributed under the University of Illinois Open Source 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// License. See LICENSE.TXT for details. 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 82a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)//===----------------------------------------------------------------------===// 92a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This file defines the Expr interface and subclasses. 112a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// 12868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)//===----------------------------------------------------------------------===// 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 147dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch#ifndef LLVM_CLANG_AST_EXPR_H 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define LLVM_CLANG_AST_EXPR_H 162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "clang/AST/APValue.h" 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "clang/AST/Stmt.h" 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "clang/AST/Type.h" 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "clang/AST/DeclAccessPair.h" 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "clang/AST/OperationKinds.h" 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "clang/AST/ASTVector.h" 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "clang/AST/UsuallyTinyPtrVector.h" 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "llvm/ADT/APSInt.h" 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "llvm/ADT/APFloat.h" 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "llvm/ADT/SmallVector.h" 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "llvm/ADT/StringRef.h" 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <vector> 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace clang { 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class ASTContext; 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class APValue; 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class Decl; 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class IdentifierInfo; 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class ParmVarDecl; 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class NamedDecl; 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class ValueDecl; 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class BlockDecl; 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class CXXBaseSpecifier; 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class CXXOperatorCallExpr; 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class CXXMemberCallExpr; 427dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch class TemplateArgumentLoc; 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class TemplateArgumentListInfo; 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/// \brief A simple array of base specifiers. 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)typedef llvm::SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/// Expr - This represents one expression. Note that Expr's are subclasses of 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/// Stmt. This allows an expression to be transparently used any place a Stmt 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/// is required. 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/// 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class Expr : public Stmt { 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) QualType TR; 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void ANCHOR(); // key function. 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)protected: 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// TypeDependent - Whether this expression is type-dependent 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// (C++ [temp.dep.expr]). 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool TypeDependent : 1; 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// ValueDependent - Whether this expression is value-dependent 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// (C++ [temp.dep.constexpr]). 632a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) bool ValueDependent : 1; 642a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 652a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) /// ValueKind - The value classification of this expression. 662a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) /// Only actually used by certain subclasses. 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) unsigned ValueKind : 2; 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) enum { BitsRemaining = 28 }; 70ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch 71ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch Expr(StmtClass SC, QualType T, bool TD, bool VD) 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : Stmt(SC), TypeDependent(TD), ValueDependent(VD), ValueKind(0) { 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) setType(T); 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 76ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch /// \brief Construct an empty expression. 77ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch explicit Expr(StmtClass SC, EmptyShell) : Stmt(SC) { } 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)public: 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Increases the reference count for this expression. 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// Invoke the Retain() operation when this expression 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// is being shared by another owner. 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Expr *Retain() { 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Stmt::Retain(); 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return this; 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) QualType getType() const { return TR; } 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void setType(QualType t) { 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // In C++, the type of an expression is always adjusted so that it 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // will not have reference type an expression will never have 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // reference type (C++ [expr]p6). Use 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // QualType::getNonReferenceType() to retrieve the non-reference 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // type. Additionally, inspect Expr::isLvalue to determine whether 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // an expression that is adjusted in this manner should be 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // considered an lvalue. 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) assert((t.isNull() || !t->isReferenceType()) && 997dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch "Expressions can't have reference type"); 100c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 101c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) TR = t; 102c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) } 103c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// isValueDependent - Determines whether this expression is 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// value-dependent (C++ [temp.dep.constexpr]). For example, the 1067dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch /// array bound of "Chars" in the following example is 1077dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch /// value-dependent. 1087dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch /// @code 1097dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch /// template<int Size, char (&Chars)[Size]> struct meta_string; 1107dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch /// @endcode 1117dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch bool isValueDependent() const { return ValueDependent; } 1127dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 1137dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch /// \brief Set whether this expression is value-dependent or not. 1147dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch void setValueDependent(bool VD) { ValueDependent = VD; } 1157dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 1167dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch /// isTypeDependent - Determines whether this expression is 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// type-dependent (C++ [temp.dep.expr]), which means that its type 118ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch /// could change from one template instantiation to the next. For 119ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch /// example, the expressions "x" and "x + y" are type-dependent in 120ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch /// the following code, but "y" is not type-dependent: 121ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch /// @code 122ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch /// template<typename T> 123ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch /// void add(T x, int y) { 1245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// x + y; 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// } 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// @endcode 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool isTypeDependent() const { return TypeDependent; } 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Set whether this expression is type-dependent or not. 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void setTypeDependent(bool TD) { TypeDependent = TD; } 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// SourceLocation tokens are not useful in isolation - they are low level 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// value objects created/interpreted by SourceManager. We assume AST 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// clients will have a pointer to the respective SourceManager. 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual SourceRange getSourceRange() const = 0; 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// getExprLoc - Return the preferred location for the arrow when diagnosing 1385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// a problem with a generic expression. 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual SourceLocation getExprLoc() const { return getLocStart(); } 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// isUnusedResultAWarning - Return true if this immediate expression should 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// be warned about if the result is unused. If so, fill in Loc and Ranges 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// with location to warn on and the source range[s] to report with the 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// warning. 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool isUnusedResultAWarning(SourceLocation &Loc, SourceRange &R1, 1465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SourceRange &R2, ASTContext &Ctx) const; 1475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// isLvalue - C99 6.3.2.1: an lvalue is an expression with an object type or 1495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// incomplete type other than void. Nonarray expressions that can be lvalues: 1505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// - name, where name must be a variable 1515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// - e[i] 1525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// - (e), where e must be an lvalue 1535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// - e.name, where e must be an lvalue 1545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// - e->name 1555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// - *e, the type of e cannot be a function type 1565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// - string-constant 1575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// - reference type [C++ [expr]] 1585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// - b ? x : y, where x and y are lvalues of suitable types [C++] 1595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// 1605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) enum isLvalueResult { 1615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LV_Valid, 1625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LV_NotObjectType, 1635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LV_IncompleteVoidType, 1645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LV_DuplicateVectorComponents, 1655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LV_InvalidExpression, 1665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LV_MemberFunction, 1675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LV_SubObjCPropertySetting, 1685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LV_ClassTemporary 1695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) }; 1705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) isLvalueResult isLvalue(ASTContext &Ctx) const; 1715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// isModifiableLvalue - C99 6.3.2.1: an lvalue that does not have array type, 1735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// does not have an incomplete type, does not have a const-qualified type, 1745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// and if it is a structure or union, does not have any member (including, 1755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// recursively, any member or element of all contained aggregates or unions) 1765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// with a const-qualified type. 1775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// 1785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \param Loc [in] [out] - A source location which *may* be filled 1795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// in with the location of the expression making this a 1805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// non-modifiable lvalue, if specified. 1815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) enum isModifiableLvalueResult { 1825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MLV_Valid, 1835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MLV_NotObjectType, 1845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MLV_IncompleteVoidType, 1855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MLV_DuplicateVectorComponents, 1865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MLV_InvalidExpression, 1875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MLV_LValueCast, // Specialized form of MLV_InvalidExpression. 1885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MLV_IncompleteType, 1895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MLV_ConstQualified, 1905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MLV_ArrayType, 1915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MLV_NotBlockQualified, 1925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MLV_ReadonlyProperty, 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MLV_NoSetterProperty, 1945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MLV_MemberFunction, 1955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MLV_SubObjCPropertySetting, 1965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MLV_ClassTemporary 1975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) }; 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) isModifiableLvalueResult isModifiableLvalue(ASTContext &Ctx, 1995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SourceLocation *Loc = 0) const; 2005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief The return type of classify(). Represents the C++0x expression 2025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// taxonomy. 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class Classification { 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 2055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief The various classification results. Most of these mean prvalue. 206c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) enum Kinds { 207c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) CL_LValue, 208c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) CL_XValue, 209c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) CL_Function, // Functions cannot be lvalues in C. 210c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) CL_Void, // Void cannot be an lvalue in C. 211c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) CL_DuplicateVectorComponents, // A vector shuffle with dupes. 212c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) CL_MemberFunction, // An expression referring to a member function 213c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) CL_SubObjCPropertySetting, 2145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CL_ClassTemporary, // A prvalue of class type 215c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) CL_PRValue // A prvalue for any other reason, of any other type 2165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) }; 2175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief The results of modification testing. 2185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) enum ModifiableType { 2195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CM_Untested, // testModifiable was false. 2205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CM_Modifiable, 2215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CM_RValue, // Not modifiable because it's an rvalue 2225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CM_Function, // Not modifiable because it's a function; C++ only 2235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CM_LValueCast, // Same as CM_RValue, but indicates GCC cast-as-lvalue ext 2245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CM_NotBlockQualified, // Not captured in the closure 2255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CM_NoSetterProperty,// Implicit assignment to ObjC property without setter 2265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CM_ConstQualified, 2275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CM_ArrayType, 2285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CM_IncompleteType 2295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) }; 2305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 2325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) friend class Expr; 2335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) unsigned short Kind; 2355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) unsigned short Modifiable; 2365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) explicit Classification(Kinds k, ModifiableType m) 2385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : Kind(k), Modifiable(m) 2395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) {} 2405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 2425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Classification() {} 2435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Kinds getKind() const { return static_cast<Kinds>(Kind); } 2455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ModifiableType getModifiable() const { 2465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) assert(Modifiable != CM_Untested && "Did not test for modifiability."); 2475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return static_cast<ModifiableType>(Modifiable); 2485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool isLValue() const { return Kind == CL_LValue; } 2505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool isXValue() const { return Kind == CL_XValue; } 2515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool isGLValue() const { return Kind <= CL_XValue; } 2525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool isPRValue() const { return Kind >= CL_Function; } 2535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool isRValue() const { return Kind >= CL_XValue; } 2545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool isModifiable() const { return getModifiable() == CM_Modifiable; } 2555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) }; 2565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Classify - Classify this expression according to the C++0x 2575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// expression taxonomy. 2585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// 2595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// C++0x defines ([basic.lval]) a new taxonomy of expressions to replace the 2605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// old lvalue vs rvalue. This function determines the type of expression this 2615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// is. There are three expression types: 2625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// - lvalues are classical lvalues as in C++03. 2635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// - prvalues are equivalent to rvalues in C++03. 2645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// - xvalues are expressions yielding unnamed rvalue references, e.g. a 2655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// function returning an rvalue reference. 2665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// lvalues and xvalues are collectively referred to as glvalues, while 2675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// prvalues and xvalues together form rvalues. 2685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Classification Classify(ASTContext &Ctx) const { 2695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return ClassifyImpl(Ctx, 0); 2705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief ClassifyModifiable - Classify this expression according to the 2735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// C++0x expression taxonomy, and see if it is valid on the left side 2745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// of an assignment. 2755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// 2765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// This function extends classify in that it also tests whether the 2775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// expression is modifiable (C99 6.3.2.1p1). 2785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \param Loc A source location that might be filled with a relevant location 2795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// if the expression is not modifiable. 2805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Classification ClassifyModifiable(ASTContext &Ctx, SourceLocation &Loc) const{ 2815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return ClassifyImpl(Ctx, &Loc); 2825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2837dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 2847dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdochprivate: 2857dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch Classification ClassifyImpl(ASTContext &Ctx, SourceLocation *Loc) const; 2867dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 2877dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdochpublic: 2887dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 2897dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch /// \brief If this expression refers to a bit-field, retrieve the 2907dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch /// declaration of that bit-field. 2917dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch FieldDecl *getBitField(); 2927dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 2937dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch const FieldDecl *getBitField() const { 2947dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch return const_cast<Expr*>(this)->getBitField(); 2957dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch } 2967dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 2977dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch /// \brief Returns whether this expression refers to a vector element. 2987dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch bool refersToVectorElement() const; 2997dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 3007dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch /// isKnownToHaveBooleanValue - Return true if this is an integer expression 3017dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch /// that is known to return 0 or 1. This happens for _Bool/bool expressions 3027dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch /// but also int expressions which are produced by things like comparisons in 3035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// C. 3045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool isKnownToHaveBooleanValue() const; 3055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// isIntegerConstantExpr - Return true if this expression is a valid integer 3075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// constant expression, and, if so, return its value in Result. If not a 3085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// valid i-c-e, return false and fill in Loc (if specified) with the location 3095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// of the invalid expression. 3105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool isIntegerConstantExpr(llvm::APSInt &Result, ASTContext &Ctx, 3115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SourceLocation *Loc = 0, 3125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool isEvaluated = true) const; 3132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) bool isIntegerConstantExpr(ASTContext &Ctx, SourceLocation *Loc = 0) const { 3142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) llvm::APSInt X; 3155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return isIntegerConstantExpr(X, Ctx, Loc); 3162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 3175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// isConstantInitializer - Returns true if this expression is a constant 3185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// initializer, which can be emitted at compile-time. 3195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool isConstantInitializer(ASTContext &Ctx, bool ForRef) const; 3205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// EvalResult is a struct with detailed info about an evaluated expression. 3225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) struct EvalResult { 3235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// Val - This is the value the expression can be folded to. 3245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) APValue Val; 3252a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// HasSideEffects - Whether the evaluated expression has side effects. 3275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// For example, (f() && 0) can be folded, but it still has side effects. 3285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool HasSideEffects; 3295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// Diag - If the expression is unfoldable, then Diag contains a note 3315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// diagnostic indicating why it's not foldable. DiagLoc indicates a caret 3325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// position for the error, and DiagExpr is the expression that caused 3335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// the error. 3345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// If the expression is foldable, but not an integer constant expression, 3355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// Diag contains a note diagnostic that describes why it isn't an integer 3365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// constant expression. If the expression *is* an integer constant 3375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// expression, then Diag will be zero. 3385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) unsigned Diag; 3395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const Expr *DiagExpr; 3407dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch SourceLocation DiagLoc; 3417dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 3427dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch EvalResult() : HasSideEffects(false), Diag(0), DiagExpr(0) {} 3437dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 3447dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch // isGlobalLValue - Return true if the evaluated lvalue expression 3457dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch // is global. 3467dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch bool isGlobalLValue() const; 3477dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch // hasSideEffects - Return true if the evaluated expression has 3487dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch // side effects. 3497dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch bool hasSideEffects() const { 3507dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch return HasSideEffects; 3517dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch } 3527dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch }; 3537dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 3547dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch /// Evaluate - Return true if this is a constant which we can fold using 3557dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch /// any crazy technique (that has nothing to do with language standards) that 3567dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch /// we want to. If this function returns true, it returns the folded constant 3577dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch /// in Result. 3587dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch bool Evaluate(EvalResult &Result, ASTContext &Ctx) const; 3597dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 3605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// EvaluateAsBooleanCondition - Return true if this is a constant 3617dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch /// which we we can fold and convert to a boolean condition using 3627dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch /// any crazy technique that we want to. 3637dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch bool EvaluateAsBooleanCondition(bool &Result, ASTContext &Ctx) const; 3645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3657dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch /// isEvaluatable - Call Evaluate to see if this expression can be constant 3665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// folded, but discard the result. 3675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool isEvaluatable(ASTContext &Ctx) const; 3685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// HasSideEffects - This routine returns true for all those expressions 3705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// which must be evaluated each time and must not be optimized away 3715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// or evaluated at compile time. Example is a function call, volatile 3725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// variable read. 3735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool HasSideEffects(ASTContext &Ctx) const; 3745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// EvaluateAsInt - Call Evaluate and return the folded integer. This 3765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// must be called on an expression that constant folds to an integer. 3775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) llvm::APSInt EvaluateAsInt(ASTContext &Ctx) const; 3785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// EvaluateAsLValue - Evaluate an expression to see if it's a lvalue 3805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// with link time known address. 3815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool EvaluateAsLValue(EvalResult &Result, ASTContext &Ctx) const; 3825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// EvaluateAsLValue - Evaluate an expression to see if it's a lvalue. 3845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool EvaluateAsAnyLValue(EvalResult &Result, ASTContext &Ctx) const; 3855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Enumeration used to describe how \c isNullPointerConstant() 3875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// should cope with value-dependent expressions. 3885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) enum NullPointerConstantValueDependence { 3895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Specifies that the expression should never be value-dependent. 3905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NPC_NeverValueDependent = 0, 3915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Specifies that a value-dependent expression of integral or 3935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// dependent type should be considered a null pointer constant. 3945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NPC_ValueDependentIsNull, 3955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Specifies that a value-dependent expression should be considered 3975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// to never be a null pointer constant. 3985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NPC_ValueDependentIsNotNull 3995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) }; 4005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4014e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) /// isNullPointerConstant - C99 6.3.2.3p3 - Return true if this is either an 4025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// integer constant expression with the value zero, or if this is one that is 4035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// cast to void*. 4045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool isNullPointerConstant(ASTContext &Ctx, 4055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NullPointerConstantValueDependence NPC) const; 4065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// isOBJCGCCandidate - Return true if this expression may be used in a read/ 4085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// write barrier. 4095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool isOBJCGCCandidate(ASTContext &Ctx) const; 4105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Result type of CanThrow(). 4125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) enum CanThrowResult { 4135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CT_Cannot, 4145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CT_Dependent, 4155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CT_Can 4165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) }; 4175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Test if this expression, if evaluated, might throw, according to 4185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// the rules of C++ [expr.unary.noexcept]. 4195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CanThrowResult CanThrow(ASTContext &C) const; 4205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// IgnoreParens - Ignore parentheses. If this Expr is a ParenExpr, return 4225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// its subexpression. If that subexpression is also a ParenExpr, 4235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// then this method recursively returns its subexpression, and so forth. 4245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// Otherwise, the method returns the current Expr. 4255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Expr *IgnoreParens(); 4265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr 4285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// or CastExprs, returning their operand. 4295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Expr *IgnoreParenCasts(); 4305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// IgnoreParenImpCasts - Ignore parentheses and implicit casts. Strip off any 4325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// ParenExpr or ImplicitCastExprs, returning their operand. 4335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Expr *IgnoreParenImpCasts(); 4345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const Expr *IgnoreParenImpCasts() const { 4365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return const_cast<Expr*>(this)->IgnoreParenImpCasts(); 4375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4382a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 4395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the 4405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// value (including ptr->int casts of the same size). Strip off any 4415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// ParenExpr or CastExprs, returning their operand. 4422a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Expr *IgnoreParenNoopCasts(ASTContext &Ctx); 4435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Determine whether this expression is a default function argument. 4455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// 4465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// Default arguments are implicitly generated in the abstract syntax tree 4475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// by semantic analysis for function calls, object constructions, etc. in 4482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) /// C++. Default arguments are represented by \c CXXDefaultArgExpr nodes; 4492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) /// this routine also looks through any implicit casts to determine whether 4505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// the expression is a default argument. 4515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool isDefaultArgument() const; 4525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) /// \brief Determine whether the result of this expression is a 4542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) /// temporary object of the given class type. 4555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool isTemporaryObject(ASTContext &Ctx, const CXXRecordDecl *TempTy) const; 4565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const Expr *IgnoreParens() const { 4585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return const_cast<Expr*>(this)->IgnoreParens(); 4595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const Expr *IgnoreParenCasts() const { 4615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return const_cast<Expr*>(this)->IgnoreParenCasts(); 4625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const Expr *IgnoreParenNoopCasts(ASTContext &Ctx) const { 4645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return const_cast<Expr*>(this)->IgnoreParenNoopCasts(Ctx); 4655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static bool hasAnyTypeDependentArguments(Expr** Exprs, unsigned NumExprs); 4685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static bool hasAnyValueDependentArguments(Expr** Exprs, unsigned NumExprs); 4695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static bool classof(const Stmt *T) { 4715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return T->getStmtClass() >= firstExprConstant && 4725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) T->getStmtClass() <= lastExprConstant; 4735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static bool classof(const Expr *) { return true; } 4755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 4765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//===----------------------------------------------------------------------===// 4795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Primary Expressions. 4805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//===----------------------------------------------------------------------===// 4815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/// \brief Represents the qualifier that may precede a C++ name, e.g., the 4835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/// "std::" in "std::sort". 4845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)struct NameQualifier { 4855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief The nested name specifier. 4865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NestedNameSpecifier *NNS; 4875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief The source range covered by the nested name specifier. 4895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SourceRange Range; 4905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 4915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/// \brief Represents an explicit template argument list in C++, e.g., 4935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/// the "<int>" in "sort<int>". 4945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)struct ExplicitTemplateArgumentList { 4955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief The source location of the left angle bracket ('<'); 4965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SourceLocation LAngleLoc; 4975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief The source location of the right angle bracket ('>'); 4995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SourceLocation RAngleLoc; 5005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief The number of template arguments in TemplateArgs. 5025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// The actual template arguments (if any) are stored after the 5035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// ExplicitTemplateArgumentList structure. 5045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) unsigned NumTemplateArgs; 5055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Retrieve the template arguments 5075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) TemplateArgumentLoc *getTemplateArgs() { 5085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return reinterpret_cast<TemplateArgumentLoc *> (this + 1); 5095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Retrieve the template arguments 5125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const TemplateArgumentLoc *getTemplateArgs() const { 5135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return reinterpret_cast<const TemplateArgumentLoc *> (this + 1); 5145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void initializeFrom(const TemplateArgumentListInfo &List); 5175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void copyInto(TemplateArgumentListInfo &List) const; 5185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static std::size_t sizeFor(unsigned NumTemplateArgs); 5195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static std::size_t sizeFor(const TemplateArgumentListInfo &List); 5205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 5215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/// DeclRefExpr - [C99 6.5.1p2] - A reference to a declared variable, function, 5235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/// enum, etc. 5245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class DeclRefExpr : public Expr { 5255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) enum { 5265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Flag on DecoratedD that specifies when this declaration reference 5275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // expression has a C++ nested-name-specifier. 5285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) HasQualifierFlag = 0x01, 5295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Flag on DecoratedD that specifies when this declaration reference 5305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // expression has an explicit C++ template argument list. 5315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) HasExplicitTemplateArgumentListFlag = 0x02 5325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) }; 5335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // DecoratedD - The declaration that we are referencing, plus two bits to 5355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // indicate whether (1) the declaration's name was explicitly qualified and 5365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // (2) the declaration's name was followed by an explicit template 5375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // argument list. 5385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) llvm::PointerIntPair<ValueDecl *, 2> DecoratedD; 5395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Loc - The location of the declaration name itself. 5415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SourceLocation Loc; 5425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// DNLoc - Provides source/type location info for the 5445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// declaration name embedded in DecoratedD. 5455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DeclarationNameLoc DNLoc; 5465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Retrieve the qualifier that preceded the declaration name, if any. 5485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NameQualifier *getNameQualifier() { 5495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if ((DecoratedD.getInt() & HasQualifierFlag) == 0) 5505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0; 5515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return reinterpret_cast<NameQualifier *> (this + 1); 5535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Retrieve the qualifier that preceded the member name, if any. 5565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const NameQualifier *getNameQualifier() const { 5575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return const_cast<DeclRefExpr *>(this)->getNameQualifier(); 5585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DeclRefExpr(NestedNameSpecifier *Qualifier, SourceRange QualifierRange, 5615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ValueDecl *D, SourceLocation NameLoc, 5625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const TemplateArgumentListInfo *TemplateArgs, 5635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) QualType T); 5645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DeclRefExpr(NestedNameSpecifier *Qualifier, SourceRange QualifierRange, 5665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ValueDecl *D, const DeclarationNameInfo &NameInfo, 5675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const TemplateArgumentListInfo *TemplateArgs, 5685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) QualType T); 5695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Construct an empty declaration reference expression. 5715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) explicit DeclRefExpr(EmptyShell Empty) 5725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : Expr(DeclRefExprClass, Empty) { } 5735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Computes the type- and value-dependence flags for this 5755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// declaration reference expression. 5765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void computeDependence(); 5775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)public: 5795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DeclRefExpr(ValueDecl *d, QualType t, SourceLocation l) : 5805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Expr(DeclRefExprClass, t, false, false), DecoratedD(d, 0), Loc(l) { 5815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) computeDependence(); 5825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static DeclRefExpr *Create(ASTContext &Context, 5855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NestedNameSpecifier *Qualifier, 5865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SourceRange QualifierRange, 5875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ValueDecl *D, 5885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SourceLocation NameLoc, 5895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) QualType T, 5905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const TemplateArgumentListInfo *TemplateArgs = 0); 5915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static DeclRefExpr *Create(ASTContext &Context, 5935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NestedNameSpecifier *Qualifier, 5945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SourceRange QualifierRange, 5955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ValueDecl *D, 5965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const DeclarationNameInfo &NameInfo, 5974e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) QualType T, 5985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const TemplateArgumentListInfo *TemplateArgs = 0); 5995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Construct an empty declaration reference expression. 6015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static DeclRefExpr *CreateEmpty(ASTContext &Context, 6025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool HasQualifier, unsigned NumTemplateArgs); 6035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ValueDecl *getDecl() { return DecoratedD.getPointer(); } 6055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const ValueDecl *getDecl() const { return DecoratedD.getPointer(); } 6065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void setDecl(ValueDecl *NewD) { DecoratedD.setPointer(NewD); } 6075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DeclarationNameInfo getNameInfo() const { 6095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return DeclarationNameInfo(getDecl()->getDeclName(), Loc, DNLoc); 6105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SourceLocation getLocation() const { return Loc; } 6135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void setLocation(SourceLocation L) { Loc = L; } 6145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual SourceRange getSourceRange() const; 6155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Determine whether this declaration reference was preceded by a 6175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// C++ nested-name-specifier, e.g., \c N::foo. 6185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool hasQualifier() const { return DecoratedD.getInt() & HasQualifierFlag; } 6195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief If the name was qualified, retrieves the source range of 6215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// the nested-name-specifier that precedes the name. Otherwise, 6225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// returns an empty source range. 6235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SourceRange getQualifierRange() const { 6245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!hasQualifier()) 6255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return SourceRange(); 6265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return getNameQualifier()->Range; 6285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief If the name was qualified, retrieves the nested-name-specifier 6315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// that precedes the name. Otherwise, returns NULL. 6325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NestedNameSpecifier *getQualifier() const { 6335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!hasQualifier()) 6345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0; 6355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return getNameQualifier()->NNS; 6375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool hasExplicitTemplateArgs() const { 6405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return (DecoratedD.getInt() & HasExplicitTemplateArgumentListFlag); 6415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Retrieve the explicit template argument list that followed the 6445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// member template name. 6455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 6465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) assert(hasExplicitTemplateArgs()); 6475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if ((DecoratedD.getInt() & HasQualifierFlag) == 0) 6495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return *reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 6505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return *reinterpret_cast<ExplicitTemplateArgumentList *>( 6525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) getNameQualifier() + 1); 6535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Retrieve the explicit template argument list that followed the 6565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// member template name. 6575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 6585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return const_cast<DeclRefExpr *>(this)->getExplicitTemplateArgs(); 6595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Retrieves the optional explicit template arguments. 6625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// This points to the same data as getExplicitTemplateArgs(), but 6635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// returns null if there are no explicit template arguments. 6645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const ExplicitTemplateArgumentList *getExplicitTemplateArgsOpt() const { 6655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!hasExplicitTemplateArgs()) return 0; 6665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return &getExplicitTemplateArgs(); 6675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Copies the template arguments (if present) into the given 6705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// structure. 6715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 6725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (hasExplicitTemplateArgs()) 6735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) getExplicitTemplateArgs().copyInto(List); 6745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Retrieve the location of the left angle bracket following the 6775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// member name ('<'), if any. 6785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SourceLocation getLAngleLoc() const { 6797dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch if (!hasExplicitTemplateArgs()) 6805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return SourceLocation(); 6815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return getExplicitTemplateArgs().LAngleLoc; 6835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Retrieve the template arguments provided as part of this 6865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// template-id. 6875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const TemplateArgumentLoc *getTemplateArgs() const { 6885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!hasExplicitTemplateArgs()) 6895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0; 6905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return getExplicitTemplateArgs().getTemplateArgs(); 6925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 6945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// \brief Retrieve the number of template arguments provided as part of this 6952a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) /// template-id. 6962a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned getNumTemplateArgs() const { 6975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!hasExplicitTemplateArgs()) 6985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0; 6995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 700 return getExplicitTemplateArgs().NumTemplateArgs; 701 } 702 703 /// \brief Retrieve the location of the right angle bracket following the 704 /// template arguments ('>'). 705 SourceLocation getRAngleLoc() const { 706 if (!hasExplicitTemplateArgs()) 707 return SourceLocation(); 708 709 return getExplicitTemplateArgs().RAngleLoc; 710 } 711 712 static bool classof(const Stmt *T) { 713 return T->getStmtClass() == DeclRefExprClass; 714 } 715 static bool classof(const DeclRefExpr *) { return true; } 716 717 // Iterators 718 virtual child_iterator child_begin(); 719 virtual child_iterator child_end(); 720 721 friend class ASTStmtReader; 722 friend class ASTStmtWriter; 723}; 724 725/// PredefinedExpr - [C99 6.4.2.2] - A predefined identifier such as __func__. 726class PredefinedExpr : public Expr { 727public: 728 enum IdentType { 729 Func, 730 Function, 731 PrettyFunction, 732 /// PrettyFunctionNoVirtual - The same as PrettyFunction, except that the 733 /// 'virtual' keyword is omitted for virtual member functions. 734 PrettyFunctionNoVirtual 735 }; 736 737private: 738 SourceLocation Loc; 739 IdentType Type; 740public: 741 PredefinedExpr(SourceLocation l, QualType type, IdentType IT) 742 : Expr(PredefinedExprClass, type, type->isDependentType(), 743 type->isDependentType()), Loc(l), Type(IT) {} 744 745 /// \brief Construct an empty predefined expression. 746 explicit PredefinedExpr(EmptyShell Empty) 747 : Expr(PredefinedExprClass, Empty) { } 748 749 IdentType getIdentType() const { return Type; } 750 void setIdentType(IdentType IT) { Type = IT; } 751 752 SourceLocation getLocation() const { return Loc; } 753 void setLocation(SourceLocation L) { Loc = L; } 754 755 static std::string ComputeName(IdentType IT, const Decl *CurrentDecl); 756 757 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 758 759 static bool classof(const Stmt *T) { 760 return T->getStmtClass() == PredefinedExprClass; 761 } 762 static bool classof(const PredefinedExpr *) { return true; } 763 764 // Iterators 765 virtual child_iterator child_begin(); 766 virtual child_iterator child_end(); 767}; 768 769/// \brief Used by IntegerLiteral/FloatingLiteral to store the numeric without 770/// leaking memory. 771/// 772/// For large floats/integers, APFloat/APInt will allocate memory from the heap 773/// to represent these numbers. Unfortunately, when we use a BumpPtrAllocator 774/// to allocate IntegerLiteral/FloatingLiteral nodes the memory associated with 775/// the APFloat/APInt values will never get freed. APNumericStorage uses 776/// ASTContext's allocator for memory allocation. 777class APNumericStorage { 778 unsigned BitWidth; 779 union { 780 uint64_t VAL; ///< Used to store the <= 64 bits integer value. 781 uint64_t *pVal; ///< Used to store the >64 bits integer value. 782 }; 783 784 bool hasAllocation() const { return llvm::APInt::getNumWords(BitWidth) > 1; } 785 786 APNumericStorage(const APNumericStorage&); // do not implement 787 APNumericStorage& operator=(const APNumericStorage&); // do not implement 788 789protected: 790 APNumericStorage() : BitWidth(0), VAL(0) { } 791 792 llvm::APInt getIntValue() const { 793 unsigned NumWords = llvm::APInt::getNumWords(BitWidth); 794 if (NumWords > 1) 795 return llvm::APInt(BitWidth, NumWords, pVal); 796 else 797 return llvm::APInt(BitWidth, VAL); 798 } 799 void setIntValue(ASTContext &C, const llvm::APInt &Val); 800}; 801 802class APIntStorage : public APNumericStorage { 803public: 804 llvm::APInt getValue() const { return getIntValue(); } 805 void setValue(ASTContext &C, const llvm::APInt &Val) { setIntValue(C, Val); } 806}; 807 808class APFloatStorage : public APNumericStorage { 809public: 810 llvm::APFloat getValue() const { return llvm::APFloat(getIntValue()); } 811 void setValue(ASTContext &C, const llvm::APFloat &Val) { 812 setIntValue(C, Val.bitcastToAPInt()); 813 } 814}; 815 816class IntegerLiteral : public Expr { 817 APIntStorage Num; 818 SourceLocation Loc; 819 820 /// \brief Construct an empty integer literal. 821 explicit IntegerLiteral(EmptyShell Empty) 822 : Expr(IntegerLiteralClass, Empty) { } 823 824public: 825 // type should be IntTy, LongTy, LongLongTy, UnsignedIntTy, UnsignedLongTy, 826 // or UnsignedLongLongTy 827 IntegerLiteral(ASTContext &C, const llvm::APInt &V, 828 QualType type, SourceLocation l) 829 : Expr(IntegerLiteralClass, type, false, false), Loc(l) { 830 assert(type->isIntegerType() && "Illegal type in IntegerLiteral"); 831 setValue(C, V); 832 } 833 834 // type should be IntTy, LongTy, LongLongTy, UnsignedIntTy, UnsignedLongTy, 835 // or UnsignedLongLongTy 836 static IntegerLiteral *Create(ASTContext &C, const llvm::APInt &V, 837 QualType type, SourceLocation l); 838 static IntegerLiteral *Create(ASTContext &C, EmptyShell Empty); 839 840 llvm::APInt getValue() const { return Num.getValue(); } 841 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 842 843 /// \brief Retrieve the location of the literal. 844 SourceLocation getLocation() const { return Loc; } 845 846 void setValue(ASTContext &C, const llvm::APInt &Val) { Num.setValue(C, Val); } 847 void setLocation(SourceLocation Location) { Loc = Location; } 848 849 static bool classof(const Stmt *T) { 850 return T->getStmtClass() == IntegerLiteralClass; 851 } 852 static bool classof(const IntegerLiteral *) { return true; } 853 854 // Iterators 855 virtual child_iterator child_begin(); 856 virtual child_iterator child_end(); 857}; 858 859class CharacterLiteral : public Expr { 860 unsigned Value; 861 SourceLocation Loc; 862 bool IsWide; 863public: 864 // type should be IntTy 865 CharacterLiteral(unsigned value, bool iswide, QualType type, SourceLocation l) 866 : Expr(CharacterLiteralClass, type, false, false), Value(value), Loc(l), 867 IsWide(iswide) { 868 } 869 870 /// \brief Construct an empty character literal. 871 CharacterLiteral(EmptyShell Empty) : Expr(CharacterLiteralClass, Empty) { } 872 873 SourceLocation getLocation() const { return Loc; } 874 bool isWide() const { return IsWide; } 875 876 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 877 878 unsigned getValue() const { return Value; } 879 880 void setLocation(SourceLocation Location) { Loc = Location; } 881 void setWide(bool W) { IsWide = W; } 882 void setValue(unsigned Val) { Value = Val; } 883 884 static bool classof(const Stmt *T) { 885 return T->getStmtClass() == CharacterLiteralClass; 886 } 887 static bool classof(const CharacterLiteral *) { return true; } 888 889 // Iterators 890 virtual child_iterator child_begin(); 891 virtual child_iterator child_end(); 892}; 893 894class FloatingLiteral : public Expr { 895 APFloatStorage Num; 896 bool IsExact : 1; 897 SourceLocation Loc; 898 899 FloatingLiteral(ASTContext &C, const llvm::APFloat &V, bool isexact, 900 QualType Type, SourceLocation L) 901 : Expr(FloatingLiteralClass, Type, false, false), 902 IsExact(isexact), Loc(L) { 903 setValue(C, V); 904 } 905 906 /// \brief Construct an empty floating-point literal. 907 explicit FloatingLiteral(EmptyShell Empty) 908 : Expr(FloatingLiteralClass, Empty), IsExact(false) { } 909 910public: 911 static FloatingLiteral *Create(ASTContext &C, const llvm::APFloat &V, 912 bool isexact, QualType Type, SourceLocation L); 913 static FloatingLiteral *Create(ASTContext &C, EmptyShell Empty); 914 915 llvm::APFloat getValue() const { return Num.getValue(); } 916 void setValue(ASTContext &C, const llvm::APFloat &Val) { 917 Num.setValue(C, Val); 918 } 919 920 bool isExact() const { return IsExact; } 921 void setExact(bool E) { IsExact = E; } 922 923 /// getValueAsApproximateDouble - This returns the value as an inaccurate 924 /// double. Note that this may cause loss of precision, but is useful for 925 /// debugging dumps, etc. 926 double getValueAsApproximateDouble() const; 927 928 SourceLocation getLocation() const { return Loc; } 929 void setLocation(SourceLocation L) { Loc = L; } 930 931 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 932 933 static bool classof(const Stmt *T) { 934 return T->getStmtClass() == FloatingLiteralClass; 935 } 936 static bool classof(const FloatingLiteral *) { return true; } 937 938 // Iterators 939 virtual child_iterator child_begin(); 940 virtual child_iterator child_end(); 941}; 942 943/// ImaginaryLiteral - We support imaginary integer and floating point literals, 944/// like "1.0i". We represent these as a wrapper around FloatingLiteral and 945/// IntegerLiteral classes. Instances of this class always have a Complex type 946/// whose element type matches the subexpression. 947/// 948class ImaginaryLiteral : public Expr { 949 Stmt *Val; 950public: 951 ImaginaryLiteral(Expr *val, QualType Ty) 952 : Expr(ImaginaryLiteralClass, Ty, false, false), Val(val) {} 953 954 /// \brief Build an empty imaginary literal. 955 explicit ImaginaryLiteral(EmptyShell Empty) 956 : Expr(ImaginaryLiteralClass, Empty) { } 957 958 const Expr *getSubExpr() const { return cast<Expr>(Val); } 959 Expr *getSubExpr() { return cast<Expr>(Val); } 960 void setSubExpr(Expr *E) { Val = E; } 961 962 virtual SourceRange getSourceRange() const { return Val->getSourceRange(); } 963 static bool classof(const Stmt *T) { 964 return T->getStmtClass() == ImaginaryLiteralClass; 965 } 966 static bool classof(const ImaginaryLiteral *) { return true; } 967 968 // Iterators 969 virtual child_iterator child_begin(); 970 virtual child_iterator child_end(); 971}; 972 973/// StringLiteral - This represents a string literal expression, e.g. "foo" 974/// or L"bar" (wide strings). The actual string is returned by getStrData() 975/// is NOT null-terminated, and the length of the string is determined by 976/// calling getByteLength(). The C type for a string is always a 977/// ConstantArrayType. In C++, the char type is const qualified, in C it is 978/// not. 979/// 980/// Note that strings in C can be formed by concatenation of multiple string 981/// literal pptokens in translation phase #6. This keeps track of the locations 982/// of each of these pieces. 983/// 984/// Strings in C can also be truncated and extended by assigning into arrays, 985/// e.g. with constructs like: 986/// char X[2] = "foobar"; 987/// In this case, getByteLength() will return 6, but the string literal will 988/// have type "char[2]". 989class StringLiteral : public Expr { 990 const char *StrData; 991 unsigned ByteLength; 992 bool IsWide; 993 unsigned NumConcatenated; 994 SourceLocation TokLocs[1]; 995 996 StringLiteral(QualType Ty) : Expr(StringLiteralClass, Ty, false, false) {} 997 998public: 999 /// This is the "fully general" constructor that allows representation of 1000 /// strings formed from multiple concatenated tokens. 1001 static StringLiteral *Create(ASTContext &C, const char *StrData, 1002 unsigned ByteLength, bool Wide, QualType Ty, 1003 const SourceLocation *Loc, unsigned NumStrs); 1004 1005 /// Simple constructor for string literals made from one token. 1006 static StringLiteral *Create(ASTContext &C, const char *StrData, 1007 unsigned ByteLength, 1008 bool Wide, QualType Ty, SourceLocation Loc) { 1009 return Create(C, StrData, ByteLength, Wide, Ty, &Loc, 1); 1010 } 1011 1012 /// \brief Construct an empty string literal. 1013 static StringLiteral *CreateEmpty(ASTContext &C, unsigned NumStrs); 1014 1015 llvm::StringRef getString() const { 1016 return llvm::StringRef(StrData, ByteLength); 1017 } 1018 1019 unsigned getByteLength() const { return ByteLength; } 1020 1021 /// \brief Sets the string data to the given string data. 1022 void setString(ASTContext &C, llvm::StringRef Str); 1023 1024 bool isWide() const { return IsWide; } 1025 void setWide(bool W) { IsWide = W; } 1026 1027 bool containsNonAsciiOrNull() const { 1028 llvm::StringRef Str = getString(); 1029 for (unsigned i = 0, e = Str.size(); i != e; ++i) 1030 if (!isascii(Str[i]) || !Str[i]) 1031 return true; 1032 return false; 1033 } 1034 /// getNumConcatenated - Get the number of string literal tokens that were 1035 /// concatenated in translation phase #6 to form this string literal. 1036 unsigned getNumConcatenated() const { return NumConcatenated; } 1037 1038 SourceLocation getStrTokenLoc(unsigned TokNum) const { 1039 assert(TokNum < NumConcatenated && "Invalid tok number"); 1040 return TokLocs[TokNum]; 1041 } 1042 void setStrTokenLoc(unsigned TokNum, SourceLocation L) { 1043 assert(TokNum < NumConcatenated && "Invalid tok number"); 1044 TokLocs[TokNum] = L; 1045 } 1046 1047 typedef const SourceLocation *tokloc_iterator; 1048 tokloc_iterator tokloc_begin() const { return TokLocs; } 1049 tokloc_iterator tokloc_end() const { return TokLocs+NumConcatenated; } 1050 1051 virtual SourceRange getSourceRange() const { 1052 return SourceRange(TokLocs[0], TokLocs[NumConcatenated-1]); 1053 } 1054 static bool classof(const Stmt *T) { 1055 return T->getStmtClass() == StringLiteralClass; 1056 } 1057 static bool classof(const StringLiteral *) { return true; } 1058 1059 // Iterators 1060 virtual child_iterator child_begin(); 1061 virtual child_iterator child_end(); 1062}; 1063 1064/// ParenExpr - This represents a parethesized expression, e.g. "(1)". This 1065/// AST node is only formed if full location information is requested. 1066class ParenExpr : public Expr { 1067 SourceLocation L, R; 1068 Stmt *Val; 1069public: 1070 ParenExpr(SourceLocation l, SourceLocation r, Expr *val) 1071 : Expr(ParenExprClass, val->getType(), 1072 val->isTypeDependent(), val->isValueDependent()), 1073 L(l), R(r), Val(val) {} 1074 1075 /// \brief Construct an empty parenthesized expression. 1076 explicit ParenExpr(EmptyShell Empty) 1077 : Expr(ParenExprClass, Empty) { } 1078 1079 const Expr *getSubExpr() const { return cast<Expr>(Val); } 1080 Expr *getSubExpr() { return cast<Expr>(Val); } 1081 void setSubExpr(Expr *E) { Val = E; } 1082 1083 virtual SourceRange getSourceRange() const { return SourceRange(L, R); } 1084 1085 /// \brief Get the location of the left parentheses '('. 1086 SourceLocation getLParen() const { return L; } 1087 void setLParen(SourceLocation Loc) { L = Loc; } 1088 1089 /// \brief Get the location of the right parentheses ')'. 1090 SourceLocation getRParen() const { return R; } 1091 void setRParen(SourceLocation Loc) { R = Loc; } 1092 1093 static bool classof(const Stmt *T) { 1094 return T->getStmtClass() == ParenExprClass; 1095 } 1096 static bool classof(const ParenExpr *) { return true; } 1097 1098 // Iterators 1099 virtual child_iterator child_begin(); 1100 virtual child_iterator child_end(); 1101}; 1102 1103 1104/// UnaryOperator - This represents the unary-expression's (except sizeof and 1105/// alignof), the postinc/postdec operators from postfix-expression, and various 1106/// extensions. 1107/// 1108/// Notes on various nodes: 1109/// 1110/// Real/Imag - These return the real/imag part of a complex operand. If 1111/// applied to a non-complex value, the former returns its operand and the 1112/// later returns zero in the type of the operand. 1113/// 1114class UnaryOperator : public Expr { 1115public: 1116 typedef UnaryOperatorKind Opcode; 1117 1118private: 1119 unsigned Opc : 5; 1120 SourceLocation Loc; 1121 Stmt *Val; 1122public: 1123 1124 UnaryOperator(Expr *input, Opcode opc, QualType type, SourceLocation l) 1125 : Expr(UnaryOperatorClass, type, 1126 input->isTypeDependent() || type->isDependentType(), 1127 input->isValueDependent()), 1128 Opc(opc), Loc(l), Val(input) {} 1129 1130 /// \brief Build an empty unary operator. 1131 explicit UnaryOperator(EmptyShell Empty) 1132 : Expr(UnaryOperatorClass, Empty), Opc(UO_AddrOf) { } 1133 1134 Opcode getOpcode() const { return static_cast<Opcode>(Opc); } 1135 void setOpcode(Opcode O) { Opc = O; } 1136 1137 Expr *getSubExpr() const { return cast<Expr>(Val); } 1138 void setSubExpr(Expr *E) { Val = E; } 1139 1140 /// getOperatorLoc - Return the location of the operator. 1141 SourceLocation getOperatorLoc() const { return Loc; } 1142 void setOperatorLoc(SourceLocation L) { Loc = L; } 1143 1144 /// isPostfix - Return true if this is a postfix operation, like x++. 1145 static bool isPostfix(Opcode Op) { 1146 return Op == UO_PostInc || Op == UO_PostDec; 1147 } 1148 1149 /// isPostfix - Return true if this is a prefix operation, like --x. 1150 static bool isPrefix(Opcode Op) { 1151 return Op == UO_PreInc || Op == UO_PreDec; 1152 } 1153 1154 bool isPrefix() const { return isPrefix(getOpcode()); } 1155 bool isPostfix() const { return isPostfix(getOpcode()); } 1156 bool isIncrementOp() const { 1157 return Opc == UO_PreInc || Opc == UO_PostInc; 1158 } 1159 bool isIncrementDecrementOp() const { 1160 return Opc <= UO_PreDec; 1161 } 1162 static bool isArithmeticOp(Opcode Op) { 1163 return Op >= UO_Plus && Op <= UO_LNot; 1164 } 1165 bool isArithmeticOp() const { return isArithmeticOp(getOpcode()); } 1166 1167 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 1168 /// corresponds to, e.g. "sizeof" or "[pre]++" 1169 static const char *getOpcodeStr(Opcode Op); 1170 1171 /// \brief Retrieve the unary opcode that corresponds to the given 1172 /// overloaded operator. 1173 static Opcode getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix); 1174 1175 /// \brief Retrieve the overloaded operator kind that corresponds to 1176 /// the given unary opcode. 1177 static OverloadedOperatorKind getOverloadedOperator(Opcode Opc); 1178 1179 virtual SourceRange getSourceRange() const { 1180 if (isPostfix()) 1181 return SourceRange(Val->getLocStart(), Loc); 1182 else 1183 return SourceRange(Loc, Val->getLocEnd()); 1184 } 1185 virtual SourceLocation getExprLoc() const { return Loc; } 1186 1187 static bool classof(const Stmt *T) { 1188 return T->getStmtClass() == UnaryOperatorClass; 1189 } 1190 static bool classof(const UnaryOperator *) { return true; } 1191 1192 // Iterators 1193 virtual child_iterator child_begin(); 1194 virtual child_iterator child_end(); 1195}; 1196 1197/// OffsetOfExpr - [C99 7.17] - This represents an expression of the form 1198/// offsetof(record-type, member-designator). For example, given: 1199/// @code 1200/// struct S { 1201/// float f; 1202/// double d; 1203/// }; 1204/// struct T { 1205/// int i; 1206/// struct S s[10]; 1207/// }; 1208/// @endcode 1209/// we can represent and evaluate the expression @c offsetof(struct T, s[2].d). 1210 1211class OffsetOfExpr : public Expr { 1212public: 1213 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 1214 class OffsetOfNode { 1215 public: 1216 /// \brief The kind of offsetof node we have. 1217 enum Kind { 1218 /// \brief An index into an array. 1219 Array = 0x00, 1220 /// \brief A field. 1221 Field = 0x01, 1222 /// \brief A field in a dependent type, known only by its name. 1223 Identifier = 0x02, 1224 /// \brief An implicit indirection through a C++ base class, when the 1225 /// field found is in a base class. 1226 Base = 0x03 1227 }; 1228 1229 private: 1230 enum { MaskBits = 2, Mask = 0x03 }; 1231 1232 /// \brief The source range that covers this part of the designator. 1233 SourceRange Range; 1234 1235 /// \brief The data describing the designator, which comes in three 1236 /// different forms, depending on the lower two bits. 1237 /// - An unsigned index into the array of Expr*'s stored after this node 1238 /// in memory, for [constant-expression] designators. 1239 /// - A FieldDecl*, for references to a known field. 1240 /// - An IdentifierInfo*, for references to a field with a given name 1241 /// when the class type is dependent. 1242 /// - A CXXBaseSpecifier*, for references that look at a field in a 1243 /// base class. 1244 uintptr_t Data; 1245 1246 public: 1247 /// \brief Create an offsetof node that refers to an array element. 1248 OffsetOfNode(SourceLocation LBracketLoc, unsigned Index, 1249 SourceLocation RBracketLoc) 1250 : Range(LBracketLoc, RBracketLoc), Data((Index << 2) | Array) { } 1251 1252 /// \brief Create an offsetof node that refers to a field. 1253 OffsetOfNode(SourceLocation DotLoc, FieldDecl *Field, 1254 SourceLocation NameLoc) 1255 : Range(DotLoc.isValid()? DotLoc : NameLoc, NameLoc), 1256 Data(reinterpret_cast<uintptr_t>(Field) | OffsetOfNode::Field) { } 1257 1258 /// \brief Create an offsetof node that refers to an identifier. 1259 OffsetOfNode(SourceLocation DotLoc, IdentifierInfo *Name, 1260 SourceLocation NameLoc) 1261 : Range(DotLoc.isValid()? DotLoc : NameLoc, NameLoc), 1262 Data(reinterpret_cast<uintptr_t>(Name) | Identifier) { } 1263 1264 /// \brief Create an offsetof node that refers into a C++ base class. 1265 explicit OffsetOfNode(const CXXBaseSpecifier *Base) 1266 : Range(), Data(reinterpret_cast<uintptr_t>(Base) | OffsetOfNode::Base) {} 1267 1268 /// \brief Determine what kind of offsetof node this is. 1269 Kind getKind() const { 1270 return static_cast<Kind>(Data & Mask); 1271 } 1272 1273 /// \brief For an array element node, returns the index into the array 1274 /// of expressions. 1275 unsigned getArrayExprIndex() const { 1276 assert(getKind() == Array); 1277 return Data >> 2; 1278 } 1279 1280 /// \brief For a field offsetof node, returns the field. 1281 FieldDecl *getField() const { 1282 assert(getKind() == Field); 1283 return reinterpret_cast<FieldDecl *>(Data & ~(uintptr_t)Mask); 1284 } 1285 1286 /// \brief For a field or identifier offsetof node, returns the name of 1287 /// the field. 1288 IdentifierInfo *getFieldName() const; 1289 1290 /// \brief For a base class node, returns the base specifier. 1291 CXXBaseSpecifier *getBase() const { 1292 assert(getKind() == Base); 1293 return reinterpret_cast<CXXBaseSpecifier *>(Data & ~(uintptr_t)Mask); 1294 } 1295 1296 /// \brief Retrieve the source range that covers this offsetof node. 1297 /// 1298 /// For an array element node, the source range contains the locations of 1299 /// the square brackets. For a field or identifier node, the source range 1300 /// contains the location of the period (if there is one) and the 1301 /// identifier. 1302 SourceRange getRange() const { return Range; } 1303 }; 1304 1305private: 1306 1307 SourceLocation OperatorLoc, RParenLoc; 1308 // Base type; 1309 TypeSourceInfo *TSInfo; 1310 // Number of sub-components (i.e. instances of OffsetOfNode). 1311 unsigned NumComps; 1312 // Number of sub-expressions (i.e. array subscript expressions). 1313 unsigned NumExprs; 1314 1315 OffsetOfExpr(ASTContext &C, QualType type, 1316 SourceLocation OperatorLoc, TypeSourceInfo *tsi, 1317 OffsetOfNode* compsPtr, unsigned numComps, 1318 Expr** exprsPtr, unsigned numExprs, 1319 SourceLocation RParenLoc); 1320 1321 explicit OffsetOfExpr(unsigned numComps, unsigned numExprs) 1322 : Expr(OffsetOfExprClass, EmptyShell()), 1323 TSInfo(0), NumComps(numComps), NumExprs(numExprs) {} 1324 1325public: 1326 1327 static OffsetOfExpr *Create(ASTContext &C, QualType type, 1328 SourceLocation OperatorLoc, TypeSourceInfo *tsi, 1329 OffsetOfNode* compsPtr, unsigned numComps, 1330 Expr** exprsPtr, unsigned numExprs, 1331 SourceLocation RParenLoc); 1332 1333 static OffsetOfExpr *CreateEmpty(ASTContext &C, 1334 unsigned NumComps, unsigned NumExprs); 1335 1336 /// getOperatorLoc - Return the location of the operator. 1337 SourceLocation getOperatorLoc() const { return OperatorLoc; } 1338 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 1339 1340 /// \brief Return the location of the right parentheses. 1341 SourceLocation getRParenLoc() const { return RParenLoc; } 1342 void setRParenLoc(SourceLocation R) { RParenLoc = R; } 1343 1344 TypeSourceInfo *getTypeSourceInfo() const { 1345 return TSInfo; 1346 } 1347 void setTypeSourceInfo(TypeSourceInfo *tsi) { 1348 TSInfo = tsi; 1349 } 1350 1351 const OffsetOfNode &getComponent(unsigned Idx) { 1352 assert(Idx < NumComps && "Subscript out of range"); 1353 return reinterpret_cast<OffsetOfNode *> (this + 1)[Idx]; 1354 } 1355 1356 void setComponent(unsigned Idx, OffsetOfNode ON) { 1357 assert(Idx < NumComps && "Subscript out of range"); 1358 reinterpret_cast<OffsetOfNode *> (this + 1)[Idx] = ON; 1359 } 1360 1361 unsigned getNumComponents() const { 1362 return NumComps; 1363 } 1364 1365 Expr* getIndexExpr(unsigned Idx) { 1366 assert(Idx < NumExprs && "Subscript out of range"); 1367 return reinterpret_cast<Expr **>( 1368 reinterpret_cast<OffsetOfNode *>(this+1) + NumComps)[Idx]; 1369 } 1370 1371 void setIndexExpr(unsigned Idx, Expr* E) { 1372 assert(Idx < NumComps && "Subscript out of range"); 1373 reinterpret_cast<Expr **>( 1374 reinterpret_cast<OffsetOfNode *>(this+1) + NumComps)[Idx] = E; 1375 } 1376 1377 unsigned getNumExpressions() const { 1378 return NumExprs; 1379 } 1380 1381 virtual SourceRange getSourceRange() const { 1382 return SourceRange(OperatorLoc, RParenLoc); 1383 } 1384 1385 static bool classof(const Stmt *T) { 1386 return T->getStmtClass() == OffsetOfExprClass; 1387 } 1388 1389 static bool classof(const OffsetOfExpr *) { return true; } 1390 1391 // Iterators 1392 virtual child_iterator child_begin(); 1393 virtual child_iterator child_end(); 1394}; 1395 1396/// SizeOfAlignOfExpr - [C99 6.5.3.4] - This is for sizeof/alignof, both of 1397/// types and expressions. 1398class SizeOfAlignOfExpr : public Expr { 1399 bool isSizeof : 1; // true if sizeof, false if alignof. 1400 bool isType : 1; // true if operand is a type, false if an expression 1401 union { 1402 TypeSourceInfo *Ty; 1403 Stmt *Ex; 1404 } Argument; 1405 SourceLocation OpLoc, RParenLoc; 1406 1407public: 1408 SizeOfAlignOfExpr(bool issizeof, TypeSourceInfo *TInfo, 1409 QualType resultType, SourceLocation op, 1410 SourceLocation rp) : 1411 Expr(SizeOfAlignOfExprClass, resultType, 1412 false, // Never type-dependent (C++ [temp.dep.expr]p3). 1413 // Value-dependent if the argument is type-dependent. 1414 TInfo->getType()->isDependentType()), 1415 isSizeof(issizeof), isType(true), OpLoc(op), RParenLoc(rp) { 1416 Argument.Ty = TInfo; 1417 } 1418 1419 SizeOfAlignOfExpr(bool issizeof, Expr *E, 1420 QualType resultType, SourceLocation op, 1421 SourceLocation rp) : 1422 Expr(SizeOfAlignOfExprClass, resultType, 1423 false, // Never type-dependent (C++ [temp.dep.expr]p3). 1424 // Value-dependent if the argument is type-dependent. 1425 E->isTypeDependent()), 1426 isSizeof(issizeof), isType(false), OpLoc(op), RParenLoc(rp) { 1427 Argument.Ex = E; 1428 } 1429 1430 /// \brief Construct an empty sizeof/alignof expression. 1431 explicit SizeOfAlignOfExpr(EmptyShell Empty) 1432 : Expr(SizeOfAlignOfExprClass, Empty) { } 1433 1434 bool isSizeOf() const { return isSizeof; } 1435 void setSizeof(bool S) { isSizeof = S; } 1436 1437 bool isArgumentType() const { return isType; } 1438 QualType getArgumentType() const { 1439 return getArgumentTypeInfo()->getType(); 1440 } 1441 TypeSourceInfo *getArgumentTypeInfo() const { 1442 assert(isArgumentType() && "calling getArgumentType() when arg is expr"); 1443 return Argument.Ty; 1444 } 1445 Expr *getArgumentExpr() { 1446 assert(!isArgumentType() && "calling getArgumentExpr() when arg is type"); 1447 return static_cast<Expr*>(Argument.Ex); 1448 } 1449 const Expr *getArgumentExpr() const { 1450 return const_cast<SizeOfAlignOfExpr*>(this)->getArgumentExpr(); 1451 } 1452 1453 void setArgument(Expr *E) { Argument.Ex = E; isType = false; } 1454 void setArgument(TypeSourceInfo *TInfo) { 1455 Argument.Ty = TInfo; 1456 isType = true; 1457 } 1458 1459 /// Gets the argument type, or the type of the argument expression, whichever 1460 /// is appropriate. 1461 QualType getTypeOfArgument() const { 1462 return isArgumentType() ? getArgumentType() : getArgumentExpr()->getType(); 1463 } 1464 1465 SourceLocation getOperatorLoc() const { return OpLoc; } 1466 void setOperatorLoc(SourceLocation L) { OpLoc = L; } 1467 1468 SourceLocation getRParenLoc() const { return RParenLoc; } 1469 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1470 1471 virtual SourceRange getSourceRange() const { 1472 return SourceRange(OpLoc, RParenLoc); 1473 } 1474 1475 static bool classof(const Stmt *T) { 1476 return T->getStmtClass() == SizeOfAlignOfExprClass; 1477 } 1478 static bool classof(const SizeOfAlignOfExpr *) { return true; } 1479 1480 // Iterators 1481 virtual child_iterator child_begin(); 1482 virtual child_iterator child_end(); 1483}; 1484 1485//===----------------------------------------------------------------------===// 1486// Postfix Operators. 1487//===----------------------------------------------------------------------===// 1488 1489/// ArraySubscriptExpr - [C99 6.5.2.1] Array Subscripting. 1490class ArraySubscriptExpr : public Expr { 1491 enum { LHS, RHS, END_EXPR=2 }; 1492 Stmt* SubExprs[END_EXPR]; 1493 SourceLocation RBracketLoc; 1494public: 1495 ArraySubscriptExpr(Expr *lhs, Expr *rhs, QualType t, 1496 SourceLocation rbracketloc) 1497 : Expr(ArraySubscriptExprClass, t, 1498 lhs->isTypeDependent() || rhs->isTypeDependent(), 1499 lhs->isValueDependent() || rhs->isValueDependent()), 1500 RBracketLoc(rbracketloc) { 1501 SubExprs[LHS] = lhs; 1502 SubExprs[RHS] = rhs; 1503 } 1504 1505 /// \brief Create an empty array subscript expression. 1506 explicit ArraySubscriptExpr(EmptyShell Shell) 1507 : Expr(ArraySubscriptExprClass, Shell) { } 1508 1509 /// An array access can be written A[4] or 4[A] (both are equivalent). 1510 /// - getBase() and getIdx() always present the normalized view: A[4]. 1511 /// In this case getBase() returns "A" and getIdx() returns "4". 1512 /// - getLHS() and getRHS() present the syntactic view. e.g. for 1513 /// 4[A] getLHS() returns "4". 1514 /// Note: Because vector element access is also written A[4] we must 1515 /// predicate the format conversion in getBase and getIdx only on the 1516 /// the type of the RHS, as it is possible for the LHS to be a vector of 1517 /// integer type 1518 Expr *getLHS() { return cast<Expr>(SubExprs[LHS]); } 1519 const Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } 1520 void setLHS(Expr *E) { SubExprs[LHS] = E; } 1521 1522 Expr *getRHS() { return cast<Expr>(SubExprs[RHS]); } 1523 const Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 1524 void setRHS(Expr *E) { SubExprs[RHS] = E; } 1525 1526 Expr *getBase() { 1527 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getLHS():getRHS()); 1528 } 1529 1530 const Expr *getBase() const { 1531 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getLHS():getRHS()); 1532 } 1533 1534 Expr *getIdx() { 1535 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getRHS():getLHS()); 1536 } 1537 1538 const Expr *getIdx() const { 1539 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getRHS():getLHS()); 1540 } 1541 1542 virtual SourceRange getSourceRange() const { 1543 return SourceRange(getLHS()->getLocStart(), RBracketLoc); 1544 } 1545 1546 SourceLocation getRBracketLoc() const { return RBracketLoc; } 1547 void setRBracketLoc(SourceLocation L) { RBracketLoc = L; } 1548 1549 virtual SourceLocation getExprLoc() const { return getBase()->getExprLoc(); } 1550 1551 static bool classof(const Stmt *T) { 1552 return T->getStmtClass() == ArraySubscriptExprClass; 1553 } 1554 static bool classof(const ArraySubscriptExpr *) { return true; } 1555 1556 // Iterators 1557 virtual child_iterator child_begin(); 1558 virtual child_iterator child_end(); 1559}; 1560 1561 1562/// CallExpr - Represents a function call (C99 6.5.2.2, C++ [expr.call]). 1563/// CallExpr itself represents a normal function call, e.g., "f(x, 2)", 1564/// while its subclasses may represent alternative syntax that (semantically) 1565/// results in a function call. For example, CXXOperatorCallExpr is 1566/// a subclass for overloaded operator calls that use operator syntax, e.g., 1567/// "str1 + str2" to resolve to a function call. 1568class CallExpr : public Expr { 1569 enum { FN=0, ARGS_START=1 }; 1570 Stmt **SubExprs; 1571 unsigned NumArgs; 1572 SourceLocation RParenLoc; 1573 1574protected: 1575 // This version of the constructor is for derived classes. 1576 CallExpr(ASTContext& C, StmtClass SC, Expr *fn, Expr **args, unsigned numargs, 1577 QualType t, SourceLocation rparenloc); 1578 1579public: 1580 CallExpr(ASTContext& C, Expr *fn, Expr **args, unsigned numargs, QualType t, 1581 SourceLocation rparenloc); 1582 1583 /// \brief Build an empty call expression. 1584 CallExpr(ASTContext &C, StmtClass SC, EmptyShell Empty); 1585 1586 const Expr *getCallee() const { return cast<Expr>(SubExprs[FN]); } 1587 Expr *getCallee() { return cast<Expr>(SubExprs[FN]); } 1588 void setCallee(Expr *F) { SubExprs[FN] = F; } 1589 1590 Decl *getCalleeDecl(); 1591 const Decl *getCalleeDecl() const { 1592 return const_cast<CallExpr*>(this)->getCalleeDecl(); 1593 } 1594 1595 /// \brief If the callee is a FunctionDecl, return it. Otherwise return 0. 1596 FunctionDecl *getDirectCallee(); 1597 const FunctionDecl *getDirectCallee() const { 1598 return const_cast<CallExpr*>(this)->getDirectCallee(); 1599 } 1600 1601 /// getNumArgs - Return the number of actual arguments to this call. 1602 /// 1603 unsigned getNumArgs() const { return NumArgs; } 1604 1605 /// getArg - Return the specified argument. 1606 Expr *getArg(unsigned Arg) { 1607 assert(Arg < NumArgs && "Arg access out of range!"); 1608 return cast<Expr>(SubExprs[Arg+ARGS_START]); 1609 } 1610 const Expr *getArg(unsigned Arg) const { 1611 assert(Arg < NumArgs && "Arg access out of range!"); 1612 return cast<Expr>(SubExprs[Arg+ARGS_START]); 1613 } 1614 1615 /// setArg - Set the specified argument. 1616 void setArg(unsigned Arg, Expr *ArgExpr) { 1617 assert(Arg < NumArgs && "Arg access out of range!"); 1618 SubExprs[Arg+ARGS_START] = ArgExpr; 1619 } 1620 1621 /// setNumArgs - This changes the number of arguments present in this call. 1622 /// Any orphaned expressions are deleted by this, and any new operands are set 1623 /// to null. 1624 void setNumArgs(ASTContext& C, unsigned NumArgs); 1625 1626 typedef ExprIterator arg_iterator; 1627 typedef ConstExprIterator const_arg_iterator; 1628 1629 arg_iterator arg_begin() { return SubExprs+ARGS_START; } 1630 arg_iterator arg_end() { return SubExprs+ARGS_START+getNumArgs(); } 1631 const_arg_iterator arg_begin() const { return SubExprs+ARGS_START; } 1632 const_arg_iterator arg_end() const { return SubExprs+ARGS_START+getNumArgs();} 1633 1634 /// getNumCommas - Return the number of commas that must have been present in 1635 /// this function call. 1636 unsigned getNumCommas() const { return NumArgs ? NumArgs - 1 : 0; } 1637 1638 /// isBuiltinCall - If this is a call to a builtin, return the builtin ID. If 1639 /// not, return 0. 1640 unsigned isBuiltinCall(ASTContext &Context) const; 1641 1642 /// getCallReturnType - Get the return type of the call expr. This is not 1643 /// always the type of the expr itself, if the return type is a reference 1644 /// type. 1645 QualType getCallReturnType() const; 1646 1647 SourceLocation getRParenLoc() const { return RParenLoc; } 1648 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1649 1650 virtual SourceRange getSourceRange() const { 1651 return SourceRange(getCallee()->getLocStart(), RParenLoc); 1652 } 1653 1654 static bool classof(const Stmt *T) { 1655 return T->getStmtClass() >= firstCallExprConstant && 1656 T->getStmtClass() <= lastCallExprConstant; 1657 } 1658 static bool classof(const CallExpr *) { return true; } 1659 1660 // Iterators 1661 virtual child_iterator child_begin(); 1662 virtual child_iterator child_end(); 1663}; 1664 1665/// MemberExpr - [C99 6.5.2.3] Structure and Union Members. X->F and X.F. 1666/// 1667class MemberExpr : public Expr { 1668 /// Extra data stored in some member expressions. 1669 struct MemberNameQualifier : public NameQualifier { 1670 DeclAccessPair FoundDecl; 1671 }; 1672 1673 /// Base - the expression for the base pointer or structure references. In 1674 /// X.F, this is "X". 1675 Stmt *Base; 1676 1677 /// MemberDecl - This is the decl being referenced by the field/member name. 1678 /// In X.F, this is the decl referenced by F. 1679 ValueDecl *MemberDecl; 1680 1681 /// MemberLoc - This is the location of the member name. 1682 SourceLocation MemberLoc; 1683 1684 /// MemberDNLoc - Provides source/type location info for the 1685 /// declaration name embedded in MemberDecl. 1686 DeclarationNameLoc MemberDNLoc; 1687 1688 /// IsArrow - True if this is "X->F", false if this is "X.F". 1689 bool IsArrow : 1; 1690 1691 /// \brief True if this member expression used a nested-name-specifier to 1692 /// refer to the member, e.g., "x->Base::f", or found its member via a using 1693 /// declaration. When true, a MemberNameQualifier 1694 /// structure is allocated immediately after the MemberExpr. 1695 bool HasQualifierOrFoundDecl : 1; 1696 1697 /// \brief True if this member expression specified a template argument list 1698 /// explicitly, e.g., x->f<int>. When true, an ExplicitTemplateArgumentList 1699 /// structure (and its TemplateArguments) are allocated immediately after 1700 /// the MemberExpr or, if the member expression also has a qualifier, after 1701 /// the MemberNameQualifier structure. 1702 bool HasExplicitTemplateArgumentList : 1; 1703 1704 /// \brief Retrieve the qualifier that preceded the member name, if any. 1705 MemberNameQualifier *getMemberQualifier() { 1706 assert(HasQualifierOrFoundDecl); 1707 return reinterpret_cast<MemberNameQualifier *> (this + 1); 1708 } 1709 1710 /// \brief Retrieve the qualifier that preceded the member name, if any. 1711 const MemberNameQualifier *getMemberQualifier() const { 1712 return const_cast<MemberExpr *>(this)->getMemberQualifier(); 1713 } 1714 1715public: 1716 MemberExpr(Expr *base, bool isarrow, ValueDecl *memberdecl, 1717 const DeclarationNameInfo &NameInfo, QualType ty) 1718 : Expr(MemberExprClass, ty, 1719 base->isTypeDependent(), base->isValueDependent()), 1720 Base(base), MemberDecl(memberdecl), MemberLoc(NameInfo.getLoc()), 1721 MemberDNLoc(NameInfo.getInfo()), IsArrow(isarrow), 1722 HasQualifierOrFoundDecl(false), HasExplicitTemplateArgumentList(false) { 1723 assert(memberdecl->getDeclName() == NameInfo.getName()); 1724 } 1725 1726 // NOTE: this constructor should be used only when it is known that 1727 // the member name can not provide additional syntactic info 1728 // (i.e., source locations for C++ operator names or type source info 1729 // for constructors, destructors and conversion oeprators). 1730 MemberExpr(Expr *base, bool isarrow, ValueDecl *memberdecl, 1731 SourceLocation l, QualType ty) 1732 : Expr(MemberExprClass, ty, 1733 base->isTypeDependent(), base->isValueDependent()), 1734 Base(base), MemberDecl(memberdecl), MemberLoc(l), MemberDNLoc(), 1735 IsArrow(isarrow), 1736 HasQualifierOrFoundDecl(false), HasExplicitTemplateArgumentList(false) {} 1737 1738 static MemberExpr *Create(ASTContext &C, Expr *base, bool isarrow, 1739 NestedNameSpecifier *qual, SourceRange qualrange, 1740 ValueDecl *memberdecl, DeclAccessPair founddecl, 1741 DeclarationNameInfo MemberNameInfo, 1742 const TemplateArgumentListInfo *targs, 1743 QualType ty); 1744 1745 void setBase(Expr *E) { Base = E; } 1746 Expr *getBase() const { return cast<Expr>(Base); } 1747 1748 /// \brief Retrieve the member declaration to which this expression refers. 1749 /// 1750 /// The returned declaration will either be a FieldDecl or (in C++) 1751 /// a CXXMethodDecl. 1752 ValueDecl *getMemberDecl() const { return MemberDecl; } 1753 void setMemberDecl(ValueDecl *D) { MemberDecl = D; } 1754 1755 /// \brief Retrieves the declaration found by lookup. 1756 DeclAccessPair getFoundDecl() const { 1757 if (!HasQualifierOrFoundDecl) 1758 return DeclAccessPair::make(getMemberDecl(), 1759 getMemberDecl()->getAccess()); 1760 return getMemberQualifier()->FoundDecl; 1761 } 1762 1763 /// \brief Determines whether this member expression actually had 1764 /// a C++ nested-name-specifier prior to the name of the member, e.g., 1765 /// x->Base::foo. 1766 bool hasQualifier() const { return getQualifier() != 0; } 1767 1768 /// \brief If the member name was qualified, retrieves the source range of 1769 /// the nested-name-specifier that precedes the member name. Otherwise, 1770 /// returns an empty source range. 1771 SourceRange getQualifierRange() const { 1772 if (!HasQualifierOrFoundDecl) 1773 return SourceRange(); 1774 1775 return getMemberQualifier()->Range; 1776 } 1777 1778 /// \brief If the member name was qualified, retrieves the 1779 /// nested-name-specifier that precedes the member name. Otherwise, returns 1780 /// NULL. 1781 NestedNameSpecifier *getQualifier() const { 1782 if (!HasQualifierOrFoundDecl) 1783 return 0; 1784 1785 return getMemberQualifier()->NNS; 1786 } 1787 1788 /// \brief Determines whether this member expression actually had a C++ 1789 /// template argument list explicitly specified, e.g., x.f<int>. 1790 bool hasExplicitTemplateArgs() const { 1791 return HasExplicitTemplateArgumentList; 1792 } 1793 1794 /// \brief Copies the template arguments (if present) into the given 1795 /// structure. 1796 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1797 if (hasExplicitTemplateArgs()) 1798 getExplicitTemplateArgs().copyInto(List); 1799 } 1800 1801 /// \brief Retrieve the explicit template argument list that 1802 /// follow the member template name. This must only be called on an 1803 /// expression with explicit template arguments. 1804 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 1805 assert(HasExplicitTemplateArgumentList); 1806 if (!HasQualifierOrFoundDecl) 1807 return *reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 1808 1809 return *reinterpret_cast<ExplicitTemplateArgumentList *>( 1810 getMemberQualifier() + 1); 1811 } 1812 1813 /// \brief Retrieve the explicit template argument list that 1814 /// followed the member template name. This must only be called on 1815 /// an expression with explicit template arguments. 1816 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1817 return const_cast<MemberExpr *>(this)->getExplicitTemplateArgs(); 1818 } 1819 1820 /// \brief Retrieves the optional explicit template arguments. 1821 /// This points to the same data as getExplicitTemplateArgs(), but 1822 /// returns null if there are no explicit template arguments. 1823 const ExplicitTemplateArgumentList *getOptionalExplicitTemplateArgs() const { 1824 if (!hasExplicitTemplateArgs()) return 0; 1825 return &getExplicitTemplateArgs(); 1826 } 1827 1828 /// \brief Retrieve the location of the left angle bracket following the 1829 /// member name ('<'), if any. 1830 SourceLocation getLAngleLoc() const { 1831 if (!HasExplicitTemplateArgumentList) 1832 return SourceLocation(); 1833 1834 return getExplicitTemplateArgs().LAngleLoc; 1835 } 1836 1837 /// \brief Retrieve the template arguments provided as part of this 1838 /// template-id. 1839 const TemplateArgumentLoc *getTemplateArgs() const { 1840 if (!HasExplicitTemplateArgumentList) 1841 return 0; 1842 1843 return getExplicitTemplateArgs().getTemplateArgs(); 1844 } 1845 1846 /// \brief Retrieve the number of template arguments provided as part of this 1847 /// template-id. 1848 unsigned getNumTemplateArgs() const { 1849 if (!HasExplicitTemplateArgumentList) 1850 return 0; 1851 1852 return getExplicitTemplateArgs().NumTemplateArgs; 1853 } 1854 1855 /// \brief Retrieve the location of the right angle bracket following the 1856 /// template arguments ('>'). 1857 SourceLocation getRAngleLoc() const { 1858 if (!HasExplicitTemplateArgumentList) 1859 return SourceLocation(); 1860 1861 return getExplicitTemplateArgs().RAngleLoc; 1862 } 1863 1864 /// \brief Retrieve the member declaration name info. 1865 DeclarationNameInfo getMemberNameInfo() const { 1866 return DeclarationNameInfo(MemberDecl->getDeclName(), 1867 MemberLoc, MemberDNLoc); 1868 } 1869 1870 bool isArrow() const { return IsArrow; } 1871 void setArrow(bool A) { IsArrow = A; } 1872 1873 /// getMemberLoc - Return the location of the "member", in X->F, it is the 1874 /// location of 'F'. 1875 SourceLocation getMemberLoc() const { return MemberLoc; } 1876 void setMemberLoc(SourceLocation L) { MemberLoc = L; } 1877 1878 virtual SourceRange getSourceRange() const { 1879 // If we have an implicit base (like a C++ implicit this), 1880 // make sure not to return its location 1881 SourceLocation EndLoc = (HasExplicitTemplateArgumentList) 1882 ? getRAngleLoc() : getMemberNameInfo().getEndLoc(); 1883 1884 SourceLocation BaseLoc = getBase()->getLocStart(); 1885 if (BaseLoc.isInvalid()) 1886 return SourceRange(MemberLoc, EndLoc); 1887 return SourceRange(BaseLoc, EndLoc); 1888 } 1889 1890 virtual SourceLocation getExprLoc() const { return MemberLoc; } 1891 1892 static bool classof(const Stmt *T) { 1893 return T->getStmtClass() == MemberExprClass; 1894 } 1895 static bool classof(const MemberExpr *) { return true; } 1896 1897 // Iterators 1898 virtual child_iterator child_begin(); 1899 virtual child_iterator child_end(); 1900}; 1901 1902/// CompoundLiteralExpr - [C99 6.5.2.5] 1903/// 1904class CompoundLiteralExpr : public Expr { 1905 /// LParenLoc - If non-null, this is the location of the left paren in a 1906 /// compound literal like "(int){4}". This can be null if this is a 1907 /// synthesized compound expression. 1908 SourceLocation LParenLoc; 1909 1910 /// The type as written. This can be an incomplete array type, in 1911 /// which case the actual expression type will be different. 1912 TypeSourceInfo *TInfo; 1913 Stmt *Init; 1914 bool FileScope; 1915public: 1916 // FIXME: Can compound literals be value-dependent? 1917 CompoundLiteralExpr(SourceLocation lparenloc, TypeSourceInfo *tinfo, 1918 QualType T, Expr *init, bool fileScope) 1919 : Expr(CompoundLiteralExprClass, T, 1920 tinfo->getType()->isDependentType(), false), 1921 LParenLoc(lparenloc), TInfo(tinfo), Init(init), FileScope(fileScope) {} 1922 1923 /// \brief Construct an empty compound literal. 1924 explicit CompoundLiteralExpr(EmptyShell Empty) 1925 : Expr(CompoundLiteralExprClass, Empty) { } 1926 1927 const Expr *getInitializer() const { return cast<Expr>(Init); } 1928 Expr *getInitializer() { return cast<Expr>(Init); } 1929 void setInitializer(Expr *E) { Init = E; } 1930 1931 bool isFileScope() const { return FileScope; } 1932 void setFileScope(bool FS) { FileScope = FS; } 1933 1934 SourceLocation getLParenLoc() const { return LParenLoc; } 1935 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 1936 1937 TypeSourceInfo *getTypeSourceInfo() const { return TInfo; } 1938 void setTypeSourceInfo(TypeSourceInfo* tinfo) { TInfo = tinfo; } 1939 1940 virtual SourceRange getSourceRange() const { 1941 // FIXME: Init should never be null. 1942 if (!Init) 1943 return SourceRange(); 1944 if (LParenLoc.isInvalid()) 1945 return Init->getSourceRange(); 1946 return SourceRange(LParenLoc, Init->getLocEnd()); 1947 } 1948 1949 static bool classof(const Stmt *T) { 1950 return T->getStmtClass() == CompoundLiteralExprClass; 1951 } 1952 static bool classof(const CompoundLiteralExpr *) { return true; } 1953 1954 // Iterators 1955 virtual child_iterator child_begin(); 1956 virtual child_iterator child_end(); 1957}; 1958 1959/// CastExpr - Base class for type casts, including both implicit 1960/// casts (ImplicitCastExpr) and explicit casts that have some 1961/// representation in the source code (ExplicitCastExpr's derived 1962/// classes). 1963class CastExpr : public Expr { 1964public: 1965 typedef clang::CastKind CastKind; 1966 1967private: 1968 unsigned Kind : 5; 1969 unsigned BasePathSize : BitsRemaining - 5; 1970 Stmt *Op; 1971 1972 void CheckBasePath() const { 1973#ifndef NDEBUG 1974 switch (getCastKind()) { 1975 case CK_DerivedToBase: 1976 case CK_UncheckedDerivedToBase: 1977 case CK_DerivedToBaseMemberPointer: 1978 case CK_BaseToDerived: 1979 case CK_BaseToDerivedMemberPointer: 1980 assert(!path_empty() && "Cast kind should have a base path!"); 1981 break; 1982 1983 // These should not have an inheritance path. 1984 case CK_Unknown: 1985 case CK_BitCast: 1986 case CK_LValueBitCast: 1987 case CK_NoOp: 1988 case CK_Dynamic: 1989 case CK_ToUnion: 1990 case CK_ArrayToPointerDecay: 1991 case CK_FunctionToPointerDecay: 1992 case CK_NullToMemberPointer: 1993 case CK_UserDefinedConversion: 1994 case CK_ConstructorConversion: 1995 case CK_IntegralToPointer: 1996 case CK_PointerToIntegral: 1997 case CK_ToVoid: 1998 case CK_VectorSplat: 1999 case CK_IntegralCast: 2000 case CK_IntegralToFloating: 2001 case CK_FloatingToIntegral: 2002 case CK_FloatingCast: 2003 case CK_MemberPointerToBoolean: 2004 case CK_AnyPointerToObjCPointerCast: 2005 case CK_AnyPointerToBlockPointerCast: 2006 case CK_ObjCObjectLValueCast: 2007 assert(path_empty() && "Cast kind should not have a base path!"); 2008 break; 2009 } 2010#endif 2011 } 2012 2013 const CXXBaseSpecifier * const *path_buffer() const { 2014 return const_cast<CastExpr*>(this)->path_buffer(); 2015 } 2016 CXXBaseSpecifier **path_buffer(); 2017 2018protected: 2019 CastExpr(StmtClass SC, QualType ty, const CastKind kind, Expr *op, 2020 unsigned BasePathSize) : 2021 Expr(SC, ty, 2022 // Cast expressions are type-dependent if the type is 2023 // dependent (C++ [temp.dep.expr]p3). 2024 ty->isDependentType(), 2025 // Cast expressions are value-dependent if the type is 2026 // dependent or if the subexpression is value-dependent. 2027 ty->isDependentType() || (op && op->isValueDependent())), 2028 Kind(kind), BasePathSize(BasePathSize), Op(op) { 2029 CheckBasePath(); 2030 } 2031 2032 /// \brief Construct an empty cast. 2033 CastExpr(StmtClass SC, EmptyShell Empty, unsigned BasePathSize) 2034 : Expr(SC, Empty), BasePathSize(BasePathSize) { } 2035 2036public: 2037 CastKind getCastKind() const { return static_cast<CastKind>(Kind); } 2038 void setCastKind(CastKind K) { Kind = K; } 2039 const char *getCastKindName() const; 2040 2041 Expr *getSubExpr() { return cast<Expr>(Op); } 2042 const Expr *getSubExpr() const { return cast<Expr>(Op); } 2043 void setSubExpr(Expr *E) { Op = E; } 2044 2045 /// \brief Retrieve the cast subexpression as it was written in the source 2046 /// code, looking through any implicit casts or other intermediate nodes 2047 /// introduced by semantic analysis. 2048 Expr *getSubExprAsWritten(); 2049 const Expr *getSubExprAsWritten() const { 2050 return const_cast<CastExpr *>(this)->getSubExprAsWritten(); 2051 } 2052 2053 typedef CXXBaseSpecifier **path_iterator; 2054 typedef const CXXBaseSpecifier * const *path_const_iterator; 2055 bool path_empty() const { return BasePathSize == 0; } 2056 unsigned path_size() const { return BasePathSize; } 2057 path_iterator path_begin() { return path_buffer(); } 2058 path_iterator path_end() { return path_buffer() + path_size(); } 2059 path_const_iterator path_begin() const { return path_buffer(); } 2060 path_const_iterator path_end() const { return path_buffer() + path_size(); } 2061 2062 void setCastPath(const CXXCastPath &Path); 2063 2064 static bool classof(const Stmt *T) { 2065 return T->getStmtClass() >= firstCastExprConstant && 2066 T->getStmtClass() <= lastCastExprConstant; 2067 } 2068 static bool classof(const CastExpr *) { return true; } 2069 2070 // Iterators 2071 virtual child_iterator child_begin(); 2072 virtual child_iterator child_end(); 2073}; 2074 2075/// ImplicitCastExpr - Allows us to explicitly represent implicit type 2076/// conversions, which have no direct representation in the original 2077/// source code. For example: converting T[]->T*, void f()->void 2078/// (*f)(), float->double, short->int, etc. 2079/// 2080/// In C, implicit casts always produce rvalues. However, in C++, an 2081/// implicit cast whose result is being bound to a reference will be 2082/// an lvalue or xvalue. For example: 2083/// 2084/// @code 2085/// class Base { }; 2086/// class Derived : public Base { }; 2087/// Derived &&ref(); 2088/// void f(Derived d) { 2089/// Base& b = d; // initializer is an ImplicitCastExpr 2090/// // to an lvalue of type Base 2091/// Base&& r = ref(); // initializer is an ImplicitCastExpr 2092/// // to an xvalue of type Base 2093/// } 2094/// @endcode 2095class ImplicitCastExpr : public CastExpr { 2096private: 2097 ImplicitCastExpr(QualType ty, CastKind kind, Expr *op, 2098 unsigned BasePathLength, ExprValueKind VK) 2099 : CastExpr(ImplicitCastExprClass, ty, kind, op, BasePathLength) { 2100 ValueKind = VK; 2101 } 2102 2103 /// \brief Construct an empty implicit cast. 2104 explicit ImplicitCastExpr(EmptyShell Shell, unsigned PathSize) 2105 : CastExpr(ImplicitCastExprClass, Shell, PathSize) { } 2106 2107public: 2108 enum OnStack_t { OnStack }; 2109 ImplicitCastExpr(OnStack_t _, QualType ty, CastKind kind, Expr *op, 2110 ExprValueKind VK) 2111 : CastExpr(ImplicitCastExprClass, ty, kind, op, 0) { 2112 ValueKind = VK; 2113 } 2114 2115 static ImplicitCastExpr *Create(ASTContext &Context, QualType T, 2116 CastKind Kind, Expr *Operand, 2117 const CXXCastPath *BasePath, 2118 ExprValueKind Cat); 2119 2120 static ImplicitCastExpr *CreateEmpty(ASTContext &Context, unsigned PathSize); 2121 2122 virtual SourceRange getSourceRange() const { 2123 return getSubExpr()->getSourceRange(); 2124 } 2125 2126 /// getValueKind - The value kind that this cast produces. 2127 ExprValueKind getValueKind() const { 2128 return static_cast<ExprValueKind>(ValueKind); 2129 } 2130 2131 /// setValueKind - Set the value kind this cast produces. 2132 void setValueKind(ExprValueKind Cat) { ValueKind = Cat; } 2133 2134 static bool classof(const Stmt *T) { 2135 return T->getStmtClass() == ImplicitCastExprClass; 2136 } 2137 static bool classof(const ImplicitCastExpr *) { return true; } 2138}; 2139 2140/// ExplicitCastExpr - An explicit cast written in the source 2141/// code. 2142/// 2143/// This class is effectively an abstract class, because it provides 2144/// the basic representation of an explicitly-written cast without 2145/// specifying which kind of cast (C cast, functional cast, static 2146/// cast, etc.) was written; specific derived classes represent the 2147/// particular style of cast and its location information. 2148/// 2149/// Unlike implicit casts, explicit cast nodes have two different 2150/// types: the type that was written into the source code, and the 2151/// actual type of the expression as determined by semantic 2152/// analysis. These types may differ slightly. For example, in C++ one 2153/// can cast to a reference type, which indicates that the resulting 2154/// expression will be an lvalue or xvalue. The reference type, however, 2155/// will not be used as the type of the expression. 2156class ExplicitCastExpr : public CastExpr { 2157 /// TInfo - Source type info for the (written) type 2158 /// this expression is casting to. 2159 TypeSourceInfo *TInfo; 2160 2161protected: 2162 ExplicitCastExpr(StmtClass SC, QualType exprTy, CastKind kind, 2163 Expr *op, unsigned PathSize, TypeSourceInfo *writtenTy) 2164 : CastExpr(SC, exprTy, kind, op, PathSize), TInfo(writtenTy) {} 2165 2166 /// \brief Construct an empty explicit cast. 2167 ExplicitCastExpr(StmtClass SC, EmptyShell Shell, unsigned PathSize) 2168 : CastExpr(SC, Shell, PathSize) { } 2169 2170public: 2171 /// getTypeInfoAsWritten - Returns the type source info for the type 2172 /// that this expression is casting to. 2173 TypeSourceInfo *getTypeInfoAsWritten() const { return TInfo; } 2174 void setTypeInfoAsWritten(TypeSourceInfo *writtenTy) { TInfo = writtenTy; } 2175 2176 /// getTypeAsWritten - Returns the type that this expression is 2177 /// casting to, as written in the source code. 2178 QualType getTypeAsWritten() const { return TInfo->getType(); } 2179 2180 static bool classof(const Stmt *T) { 2181 return T->getStmtClass() >= firstExplicitCastExprConstant && 2182 T->getStmtClass() <= lastExplicitCastExprConstant; 2183 } 2184 static bool classof(const ExplicitCastExpr *) { return true; } 2185}; 2186 2187/// CStyleCastExpr - An explicit cast in C (C99 6.5.4) or a C-style 2188/// cast in C++ (C++ [expr.cast]), which uses the syntax 2189/// (Type)expr. For example: @c (int)f. 2190class CStyleCastExpr : public ExplicitCastExpr { 2191 SourceLocation LPLoc; // the location of the left paren 2192 SourceLocation RPLoc; // the location of the right paren 2193 2194 CStyleCastExpr(QualType exprTy, CastKind kind, Expr *op, 2195 unsigned PathSize, TypeSourceInfo *writtenTy, 2196 SourceLocation l, SourceLocation r) 2197 : ExplicitCastExpr(CStyleCastExprClass, exprTy, kind, op, PathSize, 2198 writtenTy), LPLoc(l), RPLoc(r) {} 2199 2200 /// \brief Construct an empty C-style explicit cast. 2201 explicit CStyleCastExpr(EmptyShell Shell, unsigned PathSize) 2202 : ExplicitCastExpr(CStyleCastExprClass, Shell, PathSize) { } 2203 2204public: 2205 static CStyleCastExpr *Create(ASTContext &Context, QualType T, CastKind K, 2206 Expr *Op, const CXXCastPath *BasePath, 2207 TypeSourceInfo *WrittenTy, SourceLocation L, 2208 SourceLocation R); 2209 2210 static CStyleCastExpr *CreateEmpty(ASTContext &Context, unsigned PathSize); 2211 2212 SourceLocation getLParenLoc() const { return LPLoc; } 2213 void setLParenLoc(SourceLocation L) { LPLoc = L; } 2214 2215 SourceLocation getRParenLoc() const { return RPLoc; } 2216 void setRParenLoc(SourceLocation L) { RPLoc = L; } 2217 2218 virtual SourceRange getSourceRange() const { 2219 return SourceRange(LPLoc, getSubExpr()->getSourceRange().getEnd()); 2220 } 2221 static bool classof(const Stmt *T) { 2222 return T->getStmtClass() == CStyleCastExprClass; 2223 } 2224 static bool classof(const CStyleCastExpr *) { return true; } 2225}; 2226 2227/// \brief A builtin binary operation expression such as "x + y" or "x <= y". 2228/// 2229/// This expression node kind describes a builtin binary operation, 2230/// such as "x + y" for integer values "x" and "y". The operands will 2231/// already have been converted to appropriate types (e.g., by 2232/// performing promotions or conversions). 2233/// 2234/// In C++, where operators may be overloaded, a different kind of 2235/// expression node (CXXOperatorCallExpr) is used to express the 2236/// invocation of an overloaded operator with operator syntax. Within 2237/// a C++ template, whether BinaryOperator or CXXOperatorCallExpr is 2238/// used to store an expression "x + y" depends on the subexpressions 2239/// for x and y. If neither x or y is type-dependent, and the "+" 2240/// operator resolves to a built-in operation, BinaryOperator will be 2241/// used to express the computation (x and y may still be 2242/// value-dependent). If either x or y is type-dependent, or if the 2243/// "+" resolves to an overloaded operator, CXXOperatorCallExpr will 2244/// be used to express the computation. 2245class BinaryOperator : public Expr { 2246public: 2247 typedef BinaryOperatorKind Opcode; 2248 2249private: 2250 unsigned Opc : 6; 2251 SourceLocation OpLoc; 2252 2253 enum { LHS, RHS, END_EXPR }; 2254 Stmt* SubExprs[END_EXPR]; 2255public: 2256 2257 BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, 2258 SourceLocation opLoc) 2259 : Expr(BinaryOperatorClass, ResTy, 2260 lhs->isTypeDependent() || rhs->isTypeDependent(), 2261 lhs->isValueDependent() || rhs->isValueDependent()), 2262 Opc(opc), OpLoc(opLoc) { 2263 SubExprs[LHS] = lhs; 2264 SubExprs[RHS] = rhs; 2265 assert(!isCompoundAssignmentOp() && 2266 "Use ArithAssignBinaryOperator for compound assignments"); 2267 } 2268 2269 /// \brief Construct an empty binary operator. 2270 explicit BinaryOperator(EmptyShell Empty) 2271 : Expr(BinaryOperatorClass, Empty), Opc(BO_Comma) { } 2272 2273 SourceLocation getOperatorLoc() const { return OpLoc; } 2274 void setOperatorLoc(SourceLocation L) { OpLoc = L; } 2275 2276 Opcode getOpcode() const { return static_cast<Opcode>(Opc); } 2277 void setOpcode(Opcode O) { Opc = O; } 2278 2279 Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } 2280 void setLHS(Expr *E) { SubExprs[LHS] = E; } 2281 Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 2282 void setRHS(Expr *E) { SubExprs[RHS] = E; } 2283 2284 virtual SourceRange getSourceRange() const { 2285 return SourceRange(getLHS()->getLocStart(), getRHS()->getLocEnd()); 2286 } 2287 2288 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 2289 /// corresponds to, e.g. "<<=". 2290 static const char *getOpcodeStr(Opcode Op); 2291 2292 const char *getOpcodeStr() const { return getOpcodeStr(getOpcode()); } 2293 2294 /// \brief Retrieve the binary opcode that corresponds to the given 2295 /// overloaded operator. 2296 static Opcode getOverloadedOpcode(OverloadedOperatorKind OO); 2297 2298 /// \brief Retrieve the overloaded operator kind that corresponds to 2299 /// the given binary opcode. 2300 static OverloadedOperatorKind getOverloadedOperator(Opcode Opc); 2301 2302 /// predicates to categorize the respective opcodes. 2303 bool isPtrMemOp() const { return Opc == BO_PtrMemD || Opc == BO_PtrMemI; } 2304 bool isMultiplicativeOp() const { return Opc >= BO_Mul && Opc <= BO_Rem; } 2305 static bool isAdditiveOp(Opcode Opc) { return Opc == BO_Add || Opc==BO_Sub; } 2306 bool isAdditiveOp() const { return isAdditiveOp(getOpcode()); } 2307 static bool isShiftOp(Opcode Opc) { return Opc == BO_Shl || Opc == BO_Shr; } 2308 bool isShiftOp() const { return isShiftOp(getOpcode()); } 2309 2310 static bool isBitwiseOp(Opcode Opc) { return Opc >= BO_And && Opc <= BO_Or; } 2311 bool isBitwiseOp() const { return isBitwiseOp(getOpcode()); } 2312 2313 static bool isRelationalOp(Opcode Opc) { return Opc >= BO_LT && Opc<=BO_GE; } 2314 bool isRelationalOp() const { return isRelationalOp(getOpcode()); } 2315 2316 static bool isEqualityOp(Opcode Opc) { return Opc == BO_EQ || Opc == BO_NE; } 2317 bool isEqualityOp() const { return isEqualityOp(getOpcode()); } 2318 2319 static bool isComparisonOp(Opcode Opc) { return Opc >= BO_LT && Opc<=BO_NE; } 2320 bool isComparisonOp() const { return isComparisonOp(getOpcode()); } 2321 2322 static bool isLogicalOp(Opcode Opc) { return Opc == BO_LAnd || Opc==BO_LOr; } 2323 bool isLogicalOp() const { return isLogicalOp(getOpcode()); } 2324 2325 bool isAssignmentOp() const { return Opc >= BO_Assign && Opc <= BO_OrAssign; } 2326 bool isCompoundAssignmentOp() const { 2327 return Opc > BO_Assign && Opc <= BO_OrAssign; 2328 } 2329 bool isShiftAssignOp() const { 2330 return Opc == BO_ShlAssign || Opc == BO_ShrAssign; 2331 } 2332 2333 static bool classof(const Stmt *S) { 2334 return S->getStmtClass() >= firstBinaryOperatorConstant && 2335 S->getStmtClass() <= lastBinaryOperatorConstant; 2336 } 2337 static bool classof(const BinaryOperator *) { return true; } 2338 2339 // Iterators 2340 virtual child_iterator child_begin(); 2341 virtual child_iterator child_end(); 2342 2343protected: 2344 BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, 2345 SourceLocation opLoc, bool dead) 2346 : Expr(CompoundAssignOperatorClass, ResTy, 2347 lhs->isTypeDependent() || rhs->isTypeDependent(), 2348 lhs->isValueDependent() || rhs->isValueDependent()), 2349 Opc(opc), OpLoc(opLoc) { 2350 SubExprs[LHS] = lhs; 2351 SubExprs[RHS] = rhs; 2352 } 2353 2354 BinaryOperator(StmtClass SC, EmptyShell Empty) 2355 : Expr(SC, Empty), Opc(BO_MulAssign) { } 2356}; 2357 2358/// CompoundAssignOperator - For compound assignments (e.g. +=), we keep 2359/// track of the type the operation is performed in. Due to the semantics of 2360/// these operators, the operands are promoted, the aritmetic performed, an 2361/// implicit conversion back to the result type done, then the assignment takes 2362/// place. This captures the intermediate type which the computation is done 2363/// in. 2364class CompoundAssignOperator : public BinaryOperator { 2365 QualType ComputationLHSType; 2366 QualType ComputationResultType; 2367public: 2368 CompoundAssignOperator(Expr *lhs, Expr *rhs, Opcode opc, 2369 QualType ResType, QualType CompLHSType, 2370 QualType CompResultType, 2371 SourceLocation OpLoc) 2372 : BinaryOperator(lhs, rhs, opc, ResType, OpLoc, true), 2373 ComputationLHSType(CompLHSType), 2374 ComputationResultType(CompResultType) { 2375 assert(isCompoundAssignmentOp() && 2376 "Only should be used for compound assignments"); 2377 } 2378 2379 /// \brief Build an empty compound assignment operator expression. 2380 explicit CompoundAssignOperator(EmptyShell Empty) 2381 : BinaryOperator(CompoundAssignOperatorClass, Empty) { } 2382 2383 // The two computation types are the type the LHS is converted 2384 // to for the computation and the type of the result; the two are 2385 // distinct in a few cases (specifically, int+=ptr and ptr-=ptr). 2386 QualType getComputationLHSType() const { return ComputationLHSType; } 2387 void setComputationLHSType(QualType T) { ComputationLHSType = T; } 2388 2389 QualType getComputationResultType() const { return ComputationResultType; } 2390 void setComputationResultType(QualType T) { ComputationResultType = T; } 2391 2392 static bool classof(const CompoundAssignOperator *) { return true; } 2393 static bool classof(const Stmt *S) { 2394 return S->getStmtClass() == CompoundAssignOperatorClass; 2395 } 2396}; 2397 2398/// ConditionalOperator - The ?: operator. Note that LHS may be null when the 2399/// GNU "missing LHS" extension is in use. 2400/// 2401class ConditionalOperator : public Expr { 2402 enum { COND, LHS, RHS, END_EXPR }; 2403 Stmt* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. 2404 Stmt* Save; 2405 SourceLocation QuestionLoc, ColonLoc; 2406public: 2407 ConditionalOperator(Expr *cond, SourceLocation QLoc, Expr *lhs, 2408 SourceLocation CLoc, Expr *rhs, Expr *save, QualType t) 2409 : Expr(ConditionalOperatorClass, t, 2410 // FIXME: the type of the conditional operator doesn't 2411 // depend on the type of the conditional, but the standard 2412 // seems to imply that it could. File a bug! 2413 ((lhs && lhs->isTypeDependent()) || (rhs && rhs->isTypeDependent())), 2414 (cond->isValueDependent() || 2415 (lhs && lhs->isValueDependent()) || 2416 (rhs && rhs->isValueDependent()))), 2417 QuestionLoc(QLoc), 2418 ColonLoc(CLoc) { 2419 SubExprs[COND] = cond; 2420 SubExprs[LHS] = lhs; 2421 SubExprs[RHS] = rhs; 2422 Save = save; 2423 } 2424 2425 /// \brief Build an empty conditional operator. 2426 explicit ConditionalOperator(EmptyShell Empty) 2427 : Expr(ConditionalOperatorClass, Empty) { } 2428 2429 // getCond - Return the expression representing the condition for 2430 // the ?: operator. 2431 Expr *getCond() const { return cast<Expr>(SubExprs[COND]); } 2432 void setCond(Expr *E) { SubExprs[COND] = E; } 2433 2434 // getTrueExpr - Return the subexpression representing the value of the ?: 2435 // expression if the condition evaluates to true. 2436 Expr *getTrueExpr() const { 2437 return cast<Expr>(SubExprs[LHS]); 2438 } 2439 2440 // getFalseExpr - Return the subexpression representing the value of the ?: 2441 // expression if the condition evaluates to false. This is the same as getRHS. 2442 Expr *getFalseExpr() const { return cast<Expr>(SubExprs[RHS]); } 2443 2444 // getSaveExpr - In most cases this value will be null. Except a GCC extension 2445 // allows the left subexpression to be omitted, and instead of that condition 2446 // be returned. e.g: x ?: y is shorthand for x ? x : y, except that the 2447 // expression "x" is only evaluated once. Under this senario, this function 2448 // returns the original, non-converted condition expression for the ?:operator 2449 Expr *getSaveExpr() const { return Save? cast<Expr>(Save) : (Expr*)0; } 2450 2451 Expr *getLHS() const { return Save ? 0 : cast<Expr>(SubExprs[LHS]); } 2452 void setLHS(Expr *E) { SubExprs[LHS] = E; } 2453 2454 Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 2455 void setRHS(Expr *E) { SubExprs[RHS] = E; } 2456 2457 Expr *getSAVE() const { return Save? cast<Expr>(Save) : (Expr*)0; } 2458 void setSAVE(Expr *E) { Save = E; } 2459 2460 SourceLocation getQuestionLoc() const { return QuestionLoc; } 2461 void setQuestionLoc(SourceLocation L) { QuestionLoc = L; } 2462 2463 SourceLocation getColonLoc() const { return ColonLoc; } 2464 void setColonLoc(SourceLocation L) { ColonLoc = L; } 2465 2466 virtual SourceRange getSourceRange() const { 2467 return SourceRange(getCond()->getLocStart(), getRHS()->getLocEnd()); 2468 } 2469 static bool classof(const Stmt *T) { 2470 return T->getStmtClass() == ConditionalOperatorClass; 2471 } 2472 static bool classof(const ConditionalOperator *) { return true; } 2473 2474 // Iterators 2475 virtual child_iterator child_begin(); 2476 virtual child_iterator child_end(); 2477}; 2478 2479/// AddrLabelExpr - The GNU address of label extension, representing &&label. 2480class AddrLabelExpr : public Expr { 2481 SourceLocation AmpAmpLoc, LabelLoc; 2482 LabelStmt *Label; 2483public: 2484 AddrLabelExpr(SourceLocation AALoc, SourceLocation LLoc, LabelStmt *L, 2485 QualType t) 2486 : Expr(AddrLabelExprClass, t, false, false), 2487 AmpAmpLoc(AALoc), LabelLoc(LLoc), Label(L) {} 2488 2489 /// \brief Build an empty address of a label expression. 2490 explicit AddrLabelExpr(EmptyShell Empty) 2491 : Expr(AddrLabelExprClass, Empty) { } 2492 2493 SourceLocation getAmpAmpLoc() const { return AmpAmpLoc; } 2494 void setAmpAmpLoc(SourceLocation L) { AmpAmpLoc = L; } 2495 SourceLocation getLabelLoc() const { return LabelLoc; } 2496 void setLabelLoc(SourceLocation L) { LabelLoc = L; } 2497 2498 virtual SourceRange getSourceRange() const { 2499 return SourceRange(AmpAmpLoc, LabelLoc); 2500 } 2501 2502 LabelStmt *getLabel() const { return Label; } 2503 void setLabel(LabelStmt *S) { Label = S; } 2504 2505 static bool classof(const Stmt *T) { 2506 return T->getStmtClass() == AddrLabelExprClass; 2507 } 2508 static bool classof(const AddrLabelExpr *) { return true; } 2509 2510 // Iterators 2511 virtual child_iterator child_begin(); 2512 virtual child_iterator child_end(); 2513}; 2514 2515/// StmtExpr - This is the GNU Statement Expression extension: ({int X=4; X;}). 2516/// The StmtExpr contains a single CompoundStmt node, which it evaluates and 2517/// takes the value of the last subexpression. 2518class StmtExpr : public Expr { 2519 Stmt *SubStmt; 2520 SourceLocation LParenLoc, RParenLoc; 2521public: 2522 // FIXME: Does type-dependence need to be computed differently? 2523 StmtExpr(CompoundStmt *substmt, QualType T, 2524 SourceLocation lp, SourceLocation rp) : 2525 Expr(StmtExprClass, T, T->isDependentType(), false), 2526 SubStmt(substmt), LParenLoc(lp), RParenLoc(rp) { } 2527 2528 /// \brief Build an empty statement expression. 2529 explicit StmtExpr(EmptyShell Empty) : Expr(StmtExprClass, Empty) { } 2530 2531 CompoundStmt *getSubStmt() { return cast<CompoundStmt>(SubStmt); } 2532 const CompoundStmt *getSubStmt() const { return cast<CompoundStmt>(SubStmt); } 2533 void setSubStmt(CompoundStmt *S) { SubStmt = S; } 2534 2535 virtual SourceRange getSourceRange() const { 2536 return SourceRange(LParenLoc, RParenLoc); 2537 } 2538 2539 SourceLocation getLParenLoc() const { return LParenLoc; } 2540 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 2541 SourceLocation getRParenLoc() const { return RParenLoc; } 2542 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2543 2544 static bool classof(const Stmt *T) { 2545 return T->getStmtClass() == StmtExprClass; 2546 } 2547 static bool classof(const StmtExpr *) { return true; } 2548 2549 // Iterators 2550 virtual child_iterator child_begin(); 2551 virtual child_iterator child_end(); 2552}; 2553 2554/// TypesCompatibleExpr - GNU builtin-in function __builtin_types_compatible_p. 2555/// This AST node represents a function that returns 1 if two *types* (not 2556/// expressions) are compatible. The result of this built-in function can be 2557/// used in integer constant expressions. 2558class TypesCompatibleExpr : public Expr { 2559 TypeSourceInfo *TInfo1; 2560 TypeSourceInfo *TInfo2; 2561 SourceLocation BuiltinLoc, RParenLoc; 2562public: 2563 TypesCompatibleExpr(QualType ReturnType, SourceLocation BLoc, 2564 TypeSourceInfo *tinfo1, TypeSourceInfo *tinfo2, 2565 SourceLocation RP) : 2566 Expr(TypesCompatibleExprClass, ReturnType, false, false), 2567 TInfo1(tinfo1), TInfo2(tinfo2), BuiltinLoc(BLoc), RParenLoc(RP) {} 2568 2569 /// \brief Build an empty __builtin_type_compatible_p expression. 2570 explicit TypesCompatibleExpr(EmptyShell Empty) 2571 : Expr(TypesCompatibleExprClass, Empty) { } 2572 2573 TypeSourceInfo *getArgTInfo1() const { return TInfo1; } 2574 void setArgTInfo1(TypeSourceInfo *TInfo) { TInfo1 = TInfo; } 2575 TypeSourceInfo *getArgTInfo2() const { return TInfo2; } 2576 void setArgTInfo2(TypeSourceInfo *TInfo) { TInfo2 = TInfo; } 2577 2578 QualType getArgType1() const { return TInfo1->getType(); } 2579 QualType getArgType2() const { return TInfo2->getType(); } 2580 2581 SourceLocation getBuiltinLoc() const { return BuiltinLoc; } 2582 void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } 2583 2584 SourceLocation getRParenLoc() const { return RParenLoc; } 2585 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2586 2587 virtual SourceRange getSourceRange() const { 2588 return SourceRange(BuiltinLoc, RParenLoc); 2589 } 2590 static bool classof(const Stmt *T) { 2591 return T->getStmtClass() == TypesCompatibleExprClass; 2592 } 2593 static bool classof(const TypesCompatibleExpr *) { return true; } 2594 2595 // Iterators 2596 virtual child_iterator child_begin(); 2597 virtual child_iterator child_end(); 2598}; 2599 2600/// ShuffleVectorExpr - clang-specific builtin-in function 2601/// __builtin_shufflevector. 2602/// This AST node represents a operator that does a constant 2603/// shuffle, similar to LLVM's shufflevector instruction. It takes 2604/// two vectors and a variable number of constant indices, 2605/// and returns the appropriately shuffled vector. 2606class ShuffleVectorExpr : public Expr { 2607 SourceLocation BuiltinLoc, RParenLoc; 2608 2609 // SubExprs - the list of values passed to the __builtin_shufflevector 2610 // function. The first two are vectors, and the rest are constant 2611 // indices. The number of values in this list is always 2612 // 2+the number of indices in the vector type. 2613 Stmt **SubExprs; 2614 unsigned NumExprs; 2615 2616public: 2617 // FIXME: Can a shufflevector be value-dependent? Does type-dependence need 2618 // to be computed differently? 2619 ShuffleVectorExpr(ASTContext &C, Expr **args, unsigned nexpr, 2620 QualType Type, SourceLocation BLoc, 2621 SourceLocation RP) : 2622 Expr(ShuffleVectorExprClass, Type, Type->isDependentType(), false), 2623 BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(nexpr) { 2624 2625 SubExprs = new (C) Stmt*[nexpr]; 2626 for (unsigned i = 0; i < nexpr; i++) 2627 SubExprs[i] = args[i]; 2628 } 2629 2630 /// \brief Build an empty vector-shuffle expression. 2631 explicit ShuffleVectorExpr(EmptyShell Empty) 2632 : Expr(ShuffleVectorExprClass, Empty), SubExprs(0) { } 2633 2634 SourceLocation getBuiltinLoc() const { return BuiltinLoc; } 2635 void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } 2636 2637 SourceLocation getRParenLoc() const { return RParenLoc; } 2638 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2639 2640 virtual SourceRange getSourceRange() const { 2641 return SourceRange(BuiltinLoc, RParenLoc); 2642 } 2643 static bool classof(const Stmt *T) { 2644 return T->getStmtClass() == ShuffleVectorExprClass; 2645 } 2646 static bool classof(const ShuffleVectorExpr *) { return true; } 2647 2648 /// getNumSubExprs - Return the size of the SubExprs array. This includes the 2649 /// constant expression, the actual arguments passed in, and the function 2650 /// pointers. 2651 unsigned getNumSubExprs() const { return NumExprs; } 2652 2653 /// getExpr - Return the Expr at the specified index. 2654 Expr *getExpr(unsigned Index) { 2655 assert((Index < NumExprs) && "Arg access out of range!"); 2656 return cast<Expr>(SubExprs[Index]); 2657 } 2658 const Expr *getExpr(unsigned Index) const { 2659 assert((Index < NumExprs) && "Arg access out of range!"); 2660 return cast<Expr>(SubExprs[Index]); 2661 } 2662 2663 void setExprs(ASTContext &C, Expr ** Exprs, unsigned NumExprs); 2664 2665 unsigned getShuffleMaskIdx(ASTContext &Ctx, unsigned N) { 2666 assert((N < NumExprs - 2) && "Shuffle idx out of range!"); 2667 return getExpr(N+2)->EvaluateAsInt(Ctx).getZExtValue(); 2668 } 2669 2670 // Iterators 2671 virtual child_iterator child_begin(); 2672 virtual child_iterator child_end(); 2673}; 2674 2675/// ChooseExpr - GNU builtin-in function __builtin_choose_expr. 2676/// This AST node is similar to the conditional operator (?:) in C, with 2677/// the following exceptions: 2678/// - the test expression must be a integer constant expression. 2679/// - the expression returned acts like the chosen subexpression in every 2680/// visible way: the type is the same as that of the chosen subexpression, 2681/// and all predicates (whether it's an l-value, whether it's an integer 2682/// constant expression, etc.) return the same result as for the chosen 2683/// sub-expression. 2684class ChooseExpr : public Expr { 2685 enum { COND, LHS, RHS, END_EXPR }; 2686 Stmt* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. 2687 SourceLocation BuiltinLoc, RParenLoc; 2688public: 2689 ChooseExpr(SourceLocation BLoc, Expr *cond, Expr *lhs, Expr *rhs, QualType t, 2690 SourceLocation RP, bool TypeDependent, bool ValueDependent) 2691 : Expr(ChooseExprClass, t, TypeDependent, ValueDependent), 2692 BuiltinLoc(BLoc), RParenLoc(RP) { 2693 SubExprs[COND] = cond; 2694 SubExprs[LHS] = lhs; 2695 SubExprs[RHS] = rhs; 2696 } 2697 2698 /// \brief Build an empty __builtin_choose_expr. 2699 explicit ChooseExpr(EmptyShell Empty) : Expr(ChooseExprClass, Empty) { } 2700 2701 /// isConditionTrue - Return whether the condition is true (i.e. not 2702 /// equal to zero). 2703 bool isConditionTrue(ASTContext &C) const; 2704 2705 /// getChosenSubExpr - Return the subexpression chosen according to the 2706 /// condition. 2707 Expr *getChosenSubExpr(ASTContext &C) const { 2708 return isConditionTrue(C) ? getLHS() : getRHS(); 2709 } 2710 2711 Expr *getCond() const { return cast<Expr>(SubExprs[COND]); } 2712 void setCond(Expr *E) { SubExprs[COND] = E; } 2713 Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } 2714 void setLHS(Expr *E) { SubExprs[LHS] = E; } 2715 Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 2716 void setRHS(Expr *E) { SubExprs[RHS] = E; } 2717 2718 SourceLocation getBuiltinLoc() const { return BuiltinLoc; } 2719 void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } 2720 2721 SourceLocation getRParenLoc() const { return RParenLoc; } 2722 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2723 2724 virtual SourceRange getSourceRange() const { 2725 return SourceRange(BuiltinLoc, RParenLoc); 2726 } 2727 static bool classof(const Stmt *T) { 2728 return T->getStmtClass() == ChooseExprClass; 2729 } 2730 static bool classof(const ChooseExpr *) { return true; } 2731 2732 // Iterators 2733 virtual child_iterator child_begin(); 2734 virtual child_iterator child_end(); 2735}; 2736 2737/// GNUNullExpr - Implements the GNU __null extension, which is a name 2738/// for a null pointer constant that has integral type (e.g., int or 2739/// long) and is the same size and alignment as a pointer. The __null 2740/// extension is typically only used by system headers, which define 2741/// NULL as __null in C++ rather than using 0 (which is an integer 2742/// that may not match the size of a pointer). 2743class GNUNullExpr : public Expr { 2744 /// TokenLoc - The location of the __null keyword. 2745 SourceLocation TokenLoc; 2746 2747public: 2748 GNUNullExpr(QualType Ty, SourceLocation Loc) 2749 : Expr(GNUNullExprClass, Ty, false, false), TokenLoc(Loc) { } 2750 2751 /// \brief Build an empty GNU __null expression. 2752 explicit GNUNullExpr(EmptyShell Empty) : Expr(GNUNullExprClass, Empty) { } 2753 2754 /// getTokenLocation - The location of the __null token. 2755 SourceLocation getTokenLocation() const { return TokenLoc; } 2756 void setTokenLocation(SourceLocation L) { TokenLoc = L; } 2757 2758 virtual SourceRange getSourceRange() const { 2759 return SourceRange(TokenLoc); 2760 } 2761 static bool classof(const Stmt *T) { 2762 return T->getStmtClass() == GNUNullExprClass; 2763 } 2764 static bool classof(const GNUNullExpr *) { return true; } 2765 2766 // Iterators 2767 virtual child_iterator child_begin(); 2768 virtual child_iterator child_end(); 2769}; 2770 2771/// VAArgExpr, used for the builtin function __builtin_va_arg. 2772class VAArgExpr : public Expr { 2773 Stmt *Val; 2774 TypeSourceInfo *TInfo; 2775 SourceLocation BuiltinLoc, RParenLoc; 2776public: 2777 VAArgExpr(SourceLocation BLoc, Expr* e, TypeSourceInfo *TInfo, 2778 SourceLocation RPLoc, QualType t) 2779 : Expr(VAArgExprClass, t, t->isDependentType(), false), 2780 Val(e), TInfo(TInfo), 2781 BuiltinLoc(BLoc), 2782 RParenLoc(RPLoc) { } 2783 2784 /// \brief Create an empty __builtin_va_arg expression. 2785 explicit VAArgExpr(EmptyShell Empty) : Expr(VAArgExprClass, Empty) { } 2786 2787 const Expr *getSubExpr() const { return cast<Expr>(Val); } 2788 Expr *getSubExpr() { return cast<Expr>(Val); } 2789 void setSubExpr(Expr *E) { Val = E; } 2790 2791 TypeSourceInfo *getWrittenTypeInfo() const { return TInfo; } 2792 void setWrittenTypeInfo(TypeSourceInfo *TI) { TInfo = TI; } 2793 2794 SourceLocation getBuiltinLoc() const { return BuiltinLoc; } 2795 void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } 2796 2797 SourceLocation getRParenLoc() const { return RParenLoc; } 2798 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2799 2800 virtual SourceRange getSourceRange() const { 2801 return SourceRange(BuiltinLoc, RParenLoc); 2802 } 2803 static bool classof(const Stmt *T) { 2804 return T->getStmtClass() == VAArgExprClass; 2805 } 2806 static bool classof(const VAArgExpr *) { return true; } 2807 2808 // Iterators 2809 virtual child_iterator child_begin(); 2810 virtual child_iterator child_end(); 2811}; 2812 2813/// @brief Describes an C or C++ initializer list. 2814/// 2815/// InitListExpr describes an initializer list, which can be used to 2816/// initialize objects of different types, including 2817/// struct/class/union types, arrays, and vectors. For example: 2818/// 2819/// @code 2820/// struct foo x = { 1, { 2, 3 } }; 2821/// @endcode 2822/// 2823/// Prior to semantic analysis, an initializer list will represent the 2824/// initializer list as written by the user, but will have the 2825/// placeholder type "void". This initializer list is called the 2826/// syntactic form of the initializer, and may contain C99 designated 2827/// initializers (represented as DesignatedInitExprs), initializations 2828/// of subobject members without explicit braces, and so on. Clients 2829/// interested in the original syntax of the initializer list should 2830/// use the syntactic form of the initializer list. 2831/// 2832/// After semantic analysis, the initializer list will represent the 2833/// semantic form of the initializer, where the initializations of all 2834/// subobjects are made explicit with nested InitListExpr nodes and 2835/// C99 designators have been eliminated by placing the designated 2836/// initializations into the subobject they initialize. Additionally, 2837/// any "holes" in the initialization, where no initializer has been 2838/// specified for a particular subobject, will be replaced with 2839/// implicitly-generated ImplicitValueInitExpr expressions that 2840/// value-initialize the subobjects. Note, however, that the 2841/// initializer lists may still have fewer initializers than there are 2842/// elements to initialize within the object. 2843/// 2844/// Given the semantic form of the initializer list, one can retrieve 2845/// the original syntactic form of that initializer list (if it 2846/// exists) using getSyntacticForm(). Since many initializer lists 2847/// have the same syntactic and semantic forms, getSyntacticForm() may 2848/// return NULL, indicating that the current initializer list also 2849/// serves as its syntactic form. 2850class InitListExpr : public Expr { 2851 // FIXME: Eliminate this vector in favor of ASTContext allocation 2852 typedef ASTVector<Stmt *> InitExprsTy; 2853 InitExprsTy InitExprs; 2854 SourceLocation LBraceLoc, RBraceLoc; 2855 2856 /// Contains the initializer list that describes the syntactic form 2857 /// written in the source code. 2858 InitListExpr *SyntacticForm; 2859 2860 /// If this initializer list initializes a union, specifies which 2861 /// field within the union will be initialized. 2862 FieldDecl *UnionFieldInit; 2863 2864 /// Whether this initializer list originally had a GNU array-range 2865 /// designator in it. This is a temporary marker used by CodeGen. 2866 bool HadArrayRangeDesignator; 2867 2868public: 2869 InitListExpr(ASTContext &C, SourceLocation lbraceloc, 2870 Expr **initexprs, unsigned numinits, 2871 SourceLocation rbraceloc); 2872 2873 /// \brief Build an empty initializer list. 2874 explicit InitListExpr(ASTContext &C, EmptyShell Empty) 2875 : Expr(InitListExprClass, Empty), InitExprs(C) { } 2876 2877 unsigned getNumInits() const { return InitExprs.size(); } 2878 2879 const Expr *getInit(unsigned Init) const { 2880 assert(Init < getNumInits() && "Initializer access out of range!"); 2881 return cast_or_null<Expr>(InitExprs[Init]); 2882 } 2883 2884 Expr *getInit(unsigned Init) { 2885 assert(Init < getNumInits() && "Initializer access out of range!"); 2886 return cast_or_null<Expr>(InitExprs[Init]); 2887 } 2888 2889 void setInit(unsigned Init, Expr *expr) { 2890 assert(Init < getNumInits() && "Initializer access out of range!"); 2891 InitExprs[Init] = expr; 2892 } 2893 2894 /// \brief Reserve space for some number of initializers. 2895 void reserveInits(ASTContext &C, unsigned NumInits); 2896 2897 /// @brief Specify the number of initializers 2898 /// 2899 /// If there are more than @p NumInits initializers, the remaining 2900 /// initializers will be destroyed. If there are fewer than @p 2901 /// NumInits initializers, NULL expressions will be added for the 2902 /// unknown initializers. 2903 void resizeInits(ASTContext &Context, unsigned NumInits); 2904 2905 /// @brief Updates the initializer at index @p Init with the new 2906 /// expression @p expr, and returns the old expression at that 2907 /// location. 2908 /// 2909 /// When @p Init is out of range for this initializer list, the 2910 /// initializer list will be extended with NULL expressions to 2911 /// accomodate the new entry. 2912 Expr *updateInit(ASTContext &C, unsigned Init, Expr *expr); 2913 2914 /// \brief If this initializes a union, specifies which field in the 2915 /// union to initialize. 2916 /// 2917 /// Typically, this field is the first named field within the 2918 /// union. However, a designated initializer can specify the 2919 /// initialization of a different field within the union. 2920 FieldDecl *getInitializedFieldInUnion() { return UnionFieldInit; } 2921 void setInitializedFieldInUnion(FieldDecl *FD) { UnionFieldInit = FD; } 2922 2923 // Explicit InitListExpr's originate from source code (and have valid source 2924 // locations). Implicit InitListExpr's are created by the semantic analyzer. 2925 bool isExplicit() { 2926 return LBraceLoc.isValid() && RBraceLoc.isValid(); 2927 } 2928 2929 SourceLocation getLBraceLoc() const { return LBraceLoc; } 2930 void setLBraceLoc(SourceLocation Loc) { LBraceLoc = Loc; } 2931 SourceLocation getRBraceLoc() const { return RBraceLoc; } 2932 void setRBraceLoc(SourceLocation Loc) { RBraceLoc = Loc; } 2933 2934 /// @brief Retrieve the initializer list that describes the 2935 /// syntactic form of the initializer. 2936 /// 2937 /// 2938 InitListExpr *getSyntacticForm() const { return SyntacticForm; } 2939 void setSyntacticForm(InitListExpr *Init) { SyntacticForm = Init; } 2940 2941 bool hadArrayRangeDesignator() const { return HadArrayRangeDesignator; } 2942 void sawArrayRangeDesignator(bool ARD = true) { 2943 HadArrayRangeDesignator = ARD; 2944 } 2945 2946 virtual SourceRange getSourceRange() const { 2947 return SourceRange(LBraceLoc, RBraceLoc); 2948 } 2949 static bool classof(const Stmt *T) { 2950 return T->getStmtClass() == InitListExprClass; 2951 } 2952 static bool classof(const InitListExpr *) { return true; } 2953 2954 // Iterators 2955 virtual child_iterator child_begin(); 2956 virtual child_iterator child_end(); 2957 2958 typedef InitExprsTy::iterator iterator; 2959 typedef InitExprsTy::const_iterator const_iterator; 2960 typedef InitExprsTy::reverse_iterator reverse_iterator; 2961 typedef InitExprsTy::const_reverse_iterator const_reverse_iterator; 2962 2963 iterator begin() { return InitExprs.begin(); } 2964 const_iterator begin() const { return InitExprs.begin(); } 2965 iterator end() { return InitExprs.end(); } 2966 const_iterator end() const { return InitExprs.end(); } 2967 reverse_iterator rbegin() { return InitExprs.rbegin(); } 2968 const_reverse_iterator rbegin() const { return InitExprs.rbegin(); } 2969 reverse_iterator rend() { return InitExprs.rend(); } 2970 const_reverse_iterator rend() const { return InitExprs.rend(); } 2971}; 2972 2973/// @brief Represents a C99 designated initializer expression. 2974/// 2975/// A designated initializer expression (C99 6.7.8) contains one or 2976/// more designators (which can be field designators, array 2977/// designators, or GNU array-range designators) followed by an 2978/// expression that initializes the field or element(s) that the 2979/// designators refer to. For example, given: 2980/// 2981/// @code 2982/// struct point { 2983/// double x; 2984/// double y; 2985/// }; 2986/// struct point ptarray[10] = { [2].y = 1.0, [2].x = 2.0, [0].x = 1.0 }; 2987/// @endcode 2988/// 2989/// The InitListExpr contains three DesignatedInitExprs, the first of 2990/// which covers @c [2].y=1.0. This DesignatedInitExpr will have two 2991/// designators, one array designator for @c [2] followed by one field 2992/// designator for @c .y. The initalization expression will be 1.0. 2993class DesignatedInitExpr : public Expr { 2994public: 2995 /// \brief Forward declaration of the Designator class. 2996 class Designator; 2997 2998private: 2999 /// The location of the '=' or ':' prior to the actual initializer 3000 /// expression. 3001 SourceLocation EqualOrColonLoc; 3002 3003 /// Whether this designated initializer used the GNU deprecated 3004 /// syntax rather than the C99 '=' syntax. 3005 bool GNUSyntax : 1; 3006 3007 /// The number of designators in this initializer expression. 3008 unsigned NumDesignators : 15; 3009 3010 /// \brief The designators in this designated initialization 3011 /// expression. 3012 Designator *Designators; 3013 3014 /// The number of subexpressions of this initializer expression, 3015 /// which contains both the initializer and any additional 3016 /// expressions used by array and array-range designators. 3017 unsigned NumSubExprs : 16; 3018 3019 3020 DesignatedInitExpr(ASTContext &C, QualType Ty, unsigned NumDesignators, 3021 const Designator *Designators, 3022 SourceLocation EqualOrColonLoc, bool GNUSyntax, 3023 Expr **IndexExprs, unsigned NumIndexExprs, 3024 Expr *Init); 3025 3026 explicit DesignatedInitExpr(unsigned NumSubExprs) 3027 : Expr(DesignatedInitExprClass, EmptyShell()), 3028 NumDesignators(0), Designators(0), NumSubExprs(NumSubExprs) { } 3029 3030public: 3031 /// A field designator, e.g., ".x". 3032 struct FieldDesignator { 3033 /// Refers to the field that is being initialized. The low bit 3034 /// of this field determines whether this is actually a pointer 3035 /// to an IdentifierInfo (if 1) or a FieldDecl (if 0). When 3036 /// initially constructed, a field designator will store an 3037 /// IdentifierInfo*. After semantic analysis has resolved that 3038 /// name, the field designator will instead store a FieldDecl*. 3039 uintptr_t NameOrField; 3040 3041 /// The location of the '.' in the designated initializer. 3042 unsigned DotLoc; 3043 3044 /// The location of the field name in the designated initializer. 3045 unsigned FieldLoc; 3046 }; 3047 3048 /// An array or GNU array-range designator, e.g., "[9]" or "[10..15]". 3049 struct ArrayOrRangeDesignator { 3050 /// Location of the first index expression within the designated 3051 /// initializer expression's list of subexpressions. 3052 unsigned Index; 3053 /// The location of the '[' starting the array range designator. 3054 unsigned LBracketLoc; 3055 /// The location of the ellipsis separating the start and end 3056 /// indices. Only valid for GNU array-range designators. 3057 unsigned EllipsisLoc; 3058 /// The location of the ']' terminating the array range designator. 3059 unsigned RBracketLoc; 3060 }; 3061 3062 /// @brief Represents a single C99 designator. 3063 /// 3064 /// @todo This class is infuriatingly similar to clang::Designator, 3065 /// but minor differences (storing indices vs. storing pointers) 3066 /// keep us from reusing it. Try harder, later, to rectify these 3067 /// differences. 3068 class Designator { 3069 /// @brief The kind of designator this describes. 3070 enum { 3071 FieldDesignator, 3072 ArrayDesignator, 3073 ArrayRangeDesignator 3074 } Kind; 3075 3076 union { 3077 /// A field designator, e.g., ".x". 3078 struct FieldDesignator Field; 3079 /// An array or GNU array-range designator, e.g., "[9]" or "[10..15]". 3080 struct ArrayOrRangeDesignator ArrayOrRange; 3081 }; 3082 friend class DesignatedInitExpr; 3083 3084 public: 3085 Designator() {} 3086 3087 /// @brief Initializes a field designator. 3088 Designator(const IdentifierInfo *FieldName, SourceLocation DotLoc, 3089 SourceLocation FieldLoc) 3090 : Kind(FieldDesignator) { 3091 Field.NameOrField = reinterpret_cast<uintptr_t>(FieldName) | 0x01; 3092 Field.DotLoc = DotLoc.getRawEncoding(); 3093 Field.FieldLoc = FieldLoc.getRawEncoding(); 3094 } 3095 3096 /// @brief Initializes an array designator. 3097 Designator(unsigned Index, SourceLocation LBracketLoc, 3098 SourceLocation RBracketLoc) 3099 : Kind(ArrayDesignator) { 3100 ArrayOrRange.Index = Index; 3101 ArrayOrRange.LBracketLoc = LBracketLoc.getRawEncoding(); 3102 ArrayOrRange.EllipsisLoc = SourceLocation().getRawEncoding(); 3103 ArrayOrRange.RBracketLoc = RBracketLoc.getRawEncoding(); 3104 } 3105 3106 /// @brief Initializes a GNU array-range designator. 3107 Designator(unsigned Index, SourceLocation LBracketLoc, 3108 SourceLocation EllipsisLoc, SourceLocation RBracketLoc) 3109 : Kind(ArrayRangeDesignator) { 3110 ArrayOrRange.Index = Index; 3111 ArrayOrRange.LBracketLoc = LBracketLoc.getRawEncoding(); 3112 ArrayOrRange.EllipsisLoc = EllipsisLoc.getRawEncoding(); 3113 ArrayOrRange.RBracketLoc = RBracketLoc.getRawEncoding(); 3114 } 3115 3116 bool isFieldDesignator() const { return Kind == FieldDesignator; } 3117 bool isArrayDesignator() const { return Kind == ArrayDesignator; } 3118 bool isArrayRangeDesignator() const { return Kind == ArrayRangeDesignator; } 3119 3120 IdentifierInfo * getFieldName(); 3121 3122 FieldDecl *getField() { 3123 assert(Kind == FieldDesignator && "Only valid on a field designator"); 3124 if (Field.NameOrField & 0x01) 3125 return 0; 3126 else 3127 return reinterpret_cast<FieldDecl *>(Field.NameOrField); 3128 } 3129 3130 void setField(FieldDecl *FD) { 3131 assert(Kind == FieldDesignator && "Only valid on a field designator"); 3132 Field.NameOrField = reinterpret_cast<uintptr_t>(FD); 3133 } 3134 3135 SourceLocation getDotLoc() const { 3136 assert(Kind == FieldDesignator && "Only valid on a field designator"); 3137 return SourceLocation::getFromRawEncoding(Field.DotLoc); 3138 } 3139 3140 SourceLocation getFieldLoc() const { 3141 assert(Kind == FieldDesignator && "Only valid on a field designator"); 3142 return SourceLocation::getFromRawEncoding(Field.FieldLoc); 3143 } 3144 3145 SourceLocation getLBracketLoc() const { 3146 assert((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && 3147 "Only valid on an array or array-range designator"); 3148 return SourceLocation::getFromRawEncoding(ArrayOrRange.LBracketLoc); 3149 } 3150 3151 SourceLocation getRBracketLoc() const { 3152 assert((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && 3153 "Only valid on an array or array-range designator"); 3154 return SourceLocation::getFromRawEncoding(ArrayOrRange.RBracketLoc); 3155 } 3156 3157 SourceLocation getEllipsisLoc() const { 3158 assert(Kind == ArrayRangeDesignator && 3159 "Only valid on an array-range designator"); 3160 return SourceLocation::getFromRawEncoding(ArrayOrRange.EllipsisLoc); 3161 } 3162 3163 unsigned getFirstExprIndex() const { 3164 assert((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && 3165 "Only valid on an array or array-range designator"); 3166 return ArrayOrRange.Index; 3167 } 3168 3169 SourceLocation getStartLocation() const { 3170 if (Kind == FieldDesignator) 3171 return getDotLoc().isInvalid()? getFieldLoc() : getDotLoc(); 3172 else 3173 return getLBracketLoc(); 3174 } 3175 }; 3176 3177 static DesignatedInitExpr *Create(ASTContext &C, Designator *Designators, 3178 unsigned NumDesignators, 3179 Expr **IndexExprs, unsigned NumIndexExprs, 3180 SourceLocation EqualOrColonLoc, 3181 bool GNUSyntax, Expr *Init); 3182 3183 static DesignatedInitExpr *CreateEmpty(ASTContext &C, unsigned NumIndexExprs); 3184 3185 /// @brief Returns the number of designators in this initializer. 3186 unsigned size() const { return NumDesignators; } 3187 3188 // Iterator access to the designators. 3189 typedef Designator* designators_iterator; 3190 designators_iterator designators_begin() { return Designators; } 3191 designators_iterator designators_end() { 3192 return Designators + NumDesignators; 3193 } 3194 3195 Designator *getDesignator(unsigned Idx) { return &designators_begin()[Idx]; } 3196 3197 void setDesignators(ASTContext &C, const Designator *Desigs, 3198 unsigned NumDesigs); 3199 3200 Expr *getArrayIndex(const Designator& D); 3201 Expr *getArrayRangeStart(const Designator& D); 3202 Expr *getArrayRangeEnd(const Designator& D); 3203 3204 /// @brief Retrieve the location of the '=' that precedes the 3205 /// initializer value itself, if present. 3206 SourceLocation getEqualOrColonLoc() const { return EqualOrColonLoc; } 3207 void setEqualOrColonLoc(SourceLocation L) { EqualOrColonLoc = L; } 3208 3209 /// @brief Determines whether this designated initializer used the 3210 /// deprecated GNU syntax for designated initializers. 3211 bool usesGNUSyntax() const { return GNUSyntax; } 3212 void setGNUSyntax(bool GNU) { GNUSyntax = GNU; } 3213 3214 /// @brief Retrieve the initializer value. 3215 Expr *getInit() const { 3216 return cast<Expr>(*const_cast<DesignatedInitExpr*>(this)->child_begin()); 3217 } 3218 3219 void setInit(Expr *init) { 3220 *child_begin() = init; 3221 } 3222 3223 /// \brief Retrieve the total number of subexpressions in this 3224 /// designated initializer expression, including the actual 3225 /// initialized value and any expressions that occur within array 3226 /// and array-range designators. 3227 unsigned getNumSubExprs() const { return NumSubExprs; } 3228 3229 Expr *getSubExpr(unsigned Idx) { 3230 assert(Idx < NumSubExprs && "Subscript out of range"); 3231 char* Ptr = static_cast<char*>(static_cast<void *>(this)); 3232 Ptr += sizeof(DesignatedInitExpr); 3233 return reinterpret_cast<Expr**>(reinterpret_cast<void**>(Ptr))[Idx]; 3234 } 3235 3236 void setSubExpr(unsigned Idx, Expr *E) { 3237 assert(Idx < NumSubExprs && "Subscript out of range"); 3238 char* Ptr = static_cast<char*>(static_cast<void *>(this)); 3239 Ptr += sizeof(DesignatedInitExpr); 3240 reinterpret_cast<Expr**>(reinterpret_cast<void**>(Ptr))[Idx] = E; 3241 } 3242 3243 /// \brief Replaces the designator at index @p Idx with the series 3244 /// of designators in [First, Last). 3245 void ExpandDesignator(ASTContext &C, unsigned Idx, const Designator *First, 3246 const Designator *Last); 3247 3248 virtual SourceRange getSourceRange() const; 3249 3250 static bool classof(const Stmt *T) { 3251 return T->getStmtClass() == DesignatedInitExprClass; 3252 } 3253 static bool classof(const DesignatedInitExpr *) { return true; } 3254 3255 // Iterators 3256 virtual child_iterator child_begin(); 3257 virtual child_iterator child_end(); 3258}; 3259 3260/// \brief Represents an implicitly-generated value initialization of 3261/// an object of a given type. 3262/// 3263/// Implicit value initializations occur within semantic initializer 3264/// list expressions (InitListExpr) as placeholders for subobject 3265/// initializations not explicitly specified by the user. 3266/// 3267/// \see InitListExpr 3268class ImplicitValueInitExpr : public Expr { 3269public: 3270 explicit ImplicitValueInitExpr(QualType ty) 3271 : Expr(ImplicitValueInitExprClass, ty, false, false) { } 3272 3273 /// \brief Construct an empty implicit value initialization. 3274 explicit ImplicitValueInitExpr(EmptyShell Empty) 3275 : Expr(ImplicitValueInitExprClass, Empty) { } 3276 3277 static bool classof(const Stmt *T) { 3278 return T->getStmtClass() == ImplicitValueInitExprClass; 3279 } 3280 static bool classof(const ImplicitValueInitExpr *) { return true; } 3281 3282 virtual SourceRange getSourceRange() const { 3283 return SourceRange(); 3284 } 3285 3286 // Iterators 3287 virtual child_iterator child_begin(); 3288 virtual child_iterator child_end(); 3289}; 3290 3291 3292class ParenListExpr : public Expr { 3293 Stmt **Exprs; 3294 unsigned NumExprs; 3295 SourceLocation LParenLoc, RParenLoc; 3296 3297public: 3298 ParenListExpr(ASTContext& C, SourceLocation lparenloc, Expr **exprs, 3299 unsigned numexprs, SourceLocation rparenloc); 3300 3301 /// \brief Build an empty paren list. 3302 explicit ParenListExpr(EmptyShell Empty) : Expr(ParenListExprClass, Empty) { } 3303 3304 unsigned getNumExprs() const { return NumExprs; } 3305 3306 const Expr* getExpr(unsigned Init) const { 3307 assert(Init < getNumExprs() && "Initializer access out of range!"); 3308 return cast_or_null<Expr>(Exprs[Init]); 3309 } 3310 3311 Expr* getExpr(unsigned Init) { 3312 assert(Init < getNumExprs() && "Initializer access out of range!"); 3313 return cast_or_null<Expr>(Exprs[Init]); 3314 } 3315 3316 Expr **getExprs() { return reinterpret_cast<Expr **>(Exprs); } 3317 3318 SourceLocation getLParenLoc() const { return LParenLoc; } 3319 SourceLocation getRParenLoc() const { return RParenLoc; } 3320 3321 virtual SourceRange getSourceRange() const { 3322 return SourceRange(LParenLoc, RParenLoc); 3323 } 3324 static bool classof(const Stmt *T) { 3325 return T->getStmtClass() == ParenListExprClass; 3326 } 3327 static bool classof(const ParenListExpr *) { return true; } 3328 3329 // Iterators 3330 virtual child_iterator child_begin(); 3331 virtual child_iterator child_end(); 3332 3333 friend class ASTStmtReader; 3334 friend class ASTStmtWriter; 3335}; 3336 3337 3338//===----------------------------------------------------------------------===// 3339// Clang Extensions 3340//===----------------------------------------------------------------------===// 3341 3342 3343/// ExtVectorElementExpr - This represents access to specific elements of a 3344/// vector, and may occur on the left hand side or right hand side. For example 3345/// the following is legal: "V.xy = V.zw" if V is a 4 element extended vector. 3346/// 3347/// Note that the base may have either vector or pointer to vector type, just 3348/// like a struct field reference. 3349/// 3350class ExtVectorElementExpr : public Expr { 3351 Stmt *Base; 3352 IdentifierInfo *Accessor; 3353 SourceLocation AccessorLoc; 3354public: 3355 ExtVectorElementExpr(QualType ty, Expr *base, IdentifierInfo &accessor, 3356 SourceLocation loc) 3357 : Expr(ExtVectorElementExprClass, ty, base->isTypeDependent(), 3358 base->isValueDependent()), 3359 Base(base), Accessor(&accessor), AccessorLoc(loc) {} 3360 3361 /// \brief Build an empty vector element expression. 3362 explicit ExtVectorElementExpr(EmptyShell Empty) 3363 : Expr(ExtVectorElementExprClass, Empty) { } 3364 3365 const Expr *getBase() const { return cast<Expr>(Base); } 3366 Expr *getBase() { return cast<Expr>(Base); } 3367 void setBase(Expr *E) { Base = E; } 3368 3369 IdentifierInfo &getAccessor() const { return *Accessor; } 3370 void setAccessor(IdentifierInfo *II) { Accessor = II; } 3371 3372 SourceLocation getAccessorLoc() const { return AccessorLoc; } 3373 void setAccessorLoc(SourceLocation L) { AccessorLoc = L; } 3374 3375 /// getNumElements - Get the number of components being selected. 3376 unsigned getNumElements() const; 3377 3378 /// containsDuplicateElements - Return true if any element access is 3379 /// repeated. 3380 bool containsDuplicateElements() const; 3381 3382 /// getEncodedElementAccess - Encode the elements accessed into an llvm 3383 /// aggregate Constant of ConstantInt(s). 3384 void getEncodedElementAccess(llvm::SmallVectorImpl<unsigned> &Elts) const; 3385 3386 virtual SourceRange getSourceRange() const { 3387 return SourceRange(getBase()->getLocStart(), AccessorLoc); 3388 } 3389 3390 /// isArrow - Return true if the base expression is a pointer to vector, 3391 /// return false if the base expression is a vector. 3392 bool isArrow() const; 3393 3394 static bool classof(const Stmt *T) { 3395 return T->getStmtClass() == ExtVectorElementExprClass; 3396 } 3397 static bool classof(const ExtVectorElementExpr *) { return true; } 3398 3399 // Iterators 3400 virtual child_iterator child_begin(); 3401 virtual child_iterator child_end(); 3402}; 3403 3404 3405/// BlockExpr - Adaptor class for mixing a BlockDecl with expressions. 3406/// ^{ statement-body } or ^(int arg1, float arg2){ statement-body } 3407class BlockExpr : public Expr { 3408protected: 3409 BlockDecl *TheBlock; 3410 bool HasBlockDeclRefExprs; 3411public: 3412 BlockExpr(BlockDecl *BD, QualType ty, bool hasBlockDeclRefExprs) 3413 : Expr(BlockExprClass, ty, ty->isDependentType(), false), 3414 TheBlock(BD), HasBlockDeclRefExprs(hasBlockDeclRefExprs) {} 3415 3416 /// \brief Build an empty block expression. 3417 explicit BlockExpr(EmptyShell Empty) : Expr(BlockExprClass, Empty) { } 3418 3419 const BlockDecl *getBlockDecl() const { return TheBlock; } 3420 BlockDecl *getBlockDecl() { return TheBlock; } 3421 void setBlockDecl(BlockDecl *BD) { TheBlock = BD; } 3422 3423 // Convenience functions for probing the underlying BlockDecl. 3424 SourceLocation getCaretLocation() const; 3425 const Stmt *getBody() const; 3426 Stmt *getBody(); 3427 3428 virtual SourceRange getSourceRange() const { 3429 return SourceRange(getCaretLocation(), getBody()->getLocEnd()); 3430 } 3431 3432 /// getFunctionType - Return the underlying function type for this block. 3433 const FunctionType *getFunctionType() const; 3434 3435 /// hasBlockDeclRefExprs - Return true iff the block has BlockDeclRefExpr 3436 /// inside of the block that reference values outside the block. 3437 bool hasBlockDeclRefExprs() const { return HasBlockDeclRefExprs; } 3438 void setHasBlockDeclRefExprs(bool BDRE) { HasBlockDeclRefExprs = BDRE; } 3439 3440 static bool classof(const Stmt *T) { 3441 return T->getStmtClass() == BlockExprClass; 3442 } 3443 static bool classof(const BlockExpr *) { return true; } 3444 3445 // Iterators 3446 virtual child_iterator child_begin(); 3447 virtual child_iterator child_end(); 3448}; 3449 3450/// BlockDeclRefExpr - A reference to a declared variable, function, 3451/// enum, etc. 3452class BlockDeclRefExpr : public Expr { 3453 ValueDecl *D; 3454 SourceLocation Loc; 3455 bool IsByRef : 1; 3456 bool ConstQualAdded : 1; 3457 Stmt *CopyConstructorVal; 3458public: 3459 // FIXME: Fix type/value dependence! 3460 BlockDeclRefExpr(ValueDecl *d, QualType t, SourceLocation l, bool ByRef, 3461 bool constAdded = false, 3462 Stmt *copyConstructorVal = 0) 3463 : Expr(BlockDeclRefExprClass, t, (!t.isNull() && t->isDependentType()),false), 3464 D(d), Loc(l), IsByRef(ByRef), 3465 ConstQualAdded(constAdded), CopyConstructorVal(copyConstructorVal) {} 3466 3467 // \brief Build an empty reference to a declared variable in a 3468 // block. 3469 explicit BlockDeclRefExpr(EmptyShell Empty) 3470 : Expr(BlockDeclRefExprClass, Empty) { } 3471 3472 ValueDecl *getDecl() { return D; } 3473 const ValueDecl *getDecl() const { return D; } 3474 void setDecl(ValueDecl *VD) { D = VD; } 3475 3476 SourceLocation getLocation() const { return Loc; } 3477 void setLocation(SourceLocation L) { Loc = L; } 3478 3479 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 3480 3481 bool isByRef() const { return IsByRef; } 3482 void setByRef(bool BR) { IsByRef = BR; } 3483 3484 bool isConstQualAdded() const { return ConstQualAdded; } 3485 void setConstQualAdded(bool C) { ConstQualAdded = C; } 3486 3487 const Expr *getCopyConstructorExpr() const 3488 { return cast_or_null<Expr>(CopyConstructorVal); } 3489 Expr *getCopyConstructorExpr() 3490 { return cast_or_null<Expr>(CopyConstructorVal); } 3491 void setCopyConstructorExpr(Expr *E) { CopyConstructorVal = E; } 3492 3493 static bool classof(const Stmt *T) { 3494 return T->getStmtClass() == BlockDeclRefExprClass; 3495 } 3496 static bool classof(const BlockDeclRefExpr *) { return true; } 3497 3498 // Iterators 3499 virtual child_iterator child_begin(); 3500 virtual child_iterator child_end(); 3501}; 3502 3503} // end namespace clang 3504 3505#endif 3506