Douglas Gregor | 2e1cd42 | 2008-11-17 14:58:09 +0000 | [diff] [blame^] | 1 | //===-- DeclarationName.cpp - Declaration names implementation --*- C++ -*-===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This file implements the DeclarationName and DeclarationNameTable |
| 11 | // classes. |
| 12 | // |
| 13 | //===----------------------------------------------------------------------===// |
| 14 | #include "clang/AST/DeclarationName.h" |
| 15 | #include "clang/Basic/IdentifierTable.h" |
| 16 | #include "llvm/ADT/FoldingSet.h" |
| 17 | #include "llvm/Bitcode/Serialize.h" |
| 18 | #include "llvm/Bitcode/Deserialize.h" |
| 19 | using namespace clang; |
| 20 | |
| 21 | namespace clang { |
| 22 | /// CXXSpecialName - Records the type associated with one of the |
| 23 | /// "special" kinds of declaration names in C++, e.g., constructors, |
| 24 | /// destructors, and conversion functions. |
| 25 | class CXXSpecialName |
| 26 | : public DeclarationNameExtra, public llvm::FoldingSetNode { |
| 27 | public: |
| 28 | QualType Type; |
| 29 | |
| 30 | void Profile(llvm::FoldingSetNodeID &ID) { |
| 31 | ID.AddInteger(ExtraKindOrNumArgs); |
| 32 | ID.AddPointer(Type.getAsOpaquePtr()); |
| 33 | } |
| 34 | }; |
| 35 | |
| 36 | bool operator<(DeclarationName LHS, DeclarationName RHS) { |
| 37 | if (IdentifierInfo *LhsId = LHS.getAsIdentifierInfo()) |
| 38 | if (IdentifierInfo *RhsId = RHS.getAsIdentifierInfo()) |
| 39 | return strcmp(LhsId->getName(), RhsId->getName()) < 0; |
| 40 | |
| 41 | return LHS.getAsOpaqueInteger() < RHS.getAsOpaqueInteger(); |
| 42 | } |
| 43 | |
| 44 | } // end namespace clang |
| 45 | |
| 46 | DeclarationName::DeclarationName(Selector Sel) { |
| 47 | switch (Sel.getNumArgs()) { |
| 48 | case 0: |
| 49 | Ptr = reinterpret_cast<uintptr_t>(Sel.getAsIdentifierInfo()); |
| 50 | Ptr |= StoredObjCZeroArgSelector; |
| 51 | break; |
| 52 | |
| 53 | case 1: |
| 54 | Ptr = reinterpret_cast<uintptr_t>(Sel.getAsIdentifierInfo()); |
| 55 | Ptr |= StoredObjCOneArgSelector; |
| 56 | break; |
| 57 | |
| 58 | default: |
| 59 | Ptr = Sel.InfoPtr & ~Selector::ArgFlags; |
| 60 | Ptr |= StoredObjCMultiArgSelectorOrCXXName; |
| 61 | break; |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | DeclarationName::NameKind DeclarationName::getNameKind() const { |
| 66 | switch (getStoredNameKind()) { |
| 67 | case StoredIdentifier: return Identifier; |
| 68 | case StoredObjCZeroArgSelector: return ObjCZeroArgSelector; |
| 69 | case StoredObjCOneArgSelector: return ObjCOneArgSelector; |
| 70 | |
| 71 | case StoredObjCMultiArgSelectorOrCXXName: |
| 72 | switch (getExtra()->ExtraKindOrNumArgs) { |
| 73 | case DeclarationNameExtra::CXXConstructor: |
| 74 | return CXXConstructorName; |
| 75 | |
| 76 | case DeclarationNameExtra::CXXDestructor: |
| 77 | return CXXDestructorName; |
| 78 | |
| 79 | case DeclarationNameExtra::CXXConversionFunction: |
| 80 | return CXXConversionFunctionName; |
| 81 | |
| 82 | default: |
| 83 | return ObjCMultiArgSelector; |
| 84 | } |
| 85 | break; |
| 86 | } |
| 87 | |
| 88 | // Can't actually get here. |
| 89 | return Identifier; |
| 90 | } |
| 91 | |
| 92 | QualType DeclarationName::getCXXNameType() const { |
| 93 | if (CXXSpecialName *CXXName = getAsCXXSpecialName()) |
| 94 | return CXXName->Type; |
| 95 | else |
| 96 | return QualType(); |
| 97 | } |
| 98 | |
| 99 | Selector DeclarationName::getObjCSelector() const { |
| 100 | switch (getNameKind()) { |
| 101 | case ObjCZeroArgSelector: |
| 102 | return Selector(reinterpret_cast<IdentifierInfo *>(Ptr & ~PtrMask), 0); |
| 103 | |
| 104 | case ObjCOneArgSelector: |
| 105 | return Selector(reinterpret_cast<IdentifierInfo *>(Ptr & ~PtrMask), 1); |
| 106 | |
| 107 | case ObjCMultiArgSelector: |
| 108 | return Selector(reinterpret_cast<MultiKeywordSelector *>(Ptr & ~PtrMask)); |
| 109 | |
| 110 | default: |
| 111 | break; |
| 112 | } |
| 113 | |
| 114 | return Selector(); |
| 115 | } |
| 116 | |
| 117 | DeclarationNameTable::DeclarationNameTable() { |
| 118 | CXXSpecialNamesImpl = new llvm::FoldingSet<CXXSpecialName>; |
| 119 | } |
| 120 | |
| 121 | DeclarationNameTable::~DeclarationNameTable() { |
| 122 | delete static_cast<llvm::FoldingSet<CXXSpecialName>*>(CXXSpecialNamesImpl); |
| 123 | } |
| 124 | |
| 125 | DeclarationName |
| 126 | DeclarationNameTable::getCXXSpecialName(DeclarationName::NameKind Kind, |
| 127 | QualType Ty) { |
| 128 | assert(Kind >= DeclarationName::CXXConstructorName && |
| 129 | Kind <= DeclarationName::CXXConversionFunctionName && |
| 130 | "Kind must be a C++ special name kind"); |
| 131 | |
| 132 | llvm::FoldingSet<CXXSpecialName> *SpecialNames |
| 133 | = static_cast<llvm::FoldingSet<CXXSpecialName>*>(CXXSpecialNamesImpl); |
| 134 | |
| 135 | DeclarationNameExtra::ExtraKind EKind; |
| 136 | switch (Kind) { |
| 137 | case DeclarationName::CXXConstructorName: |
| 138 | EKind = DeclarationNameExtra::CXXConstructor; |
| 139 | break; |
| 140 | case DeclarationName::CXXDestructorName: |
| 141 | EKind = DeclarationNameExtra::CXXDestructor; |
| 142 | break; |
| 143 | case DeclarationName::CXXConversionFunctionName: |
| 144 | EKind = DeclarationNameExtra::CXXConversionFunction; |
| 145 | break; |
| 146 | default: |
| 147 | return DeclarationName(); |
| 148 | } |
| 149 | |
| 150 | // Unique selector, to guarantee there is one per name. |
| 151 | llvm::FoldingSetNodeID ID; |
| 152 | ID.AddInteger(EKind); |
| 153 | ID.AddPointer(Ty.getAsOpaquePtr()); |
| 154 | |
| 155 | void *InsertPos = 0; |
| 156 | if (CXXSpecialName *Name = SpecialNames->FindNodeOrInsertPos(ID, InsertPos)) |
| 157 | return DeclarationName(Name); |
| 158 | |
| 159 | CXXSpecialName *SpecialName = new CXXSpecialName; |
| 160 | SpecialName->ExtraKindOrNumArgs = EKind; |
| 161 | SpecialName->Type = Ty; |
| 162 | |
| 163 | SpecialNames->InsertNode(SpecialName, InsertPos); |
| 164 | return DeclarationName(SpecialName); |
| 165 | } |
| 166 | |