1 //===- ASTCommon.h - Common stuff for ASTReader/ASTWriter -*- C++ -*-=========// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file defines common functions that both ASTReader and ASTWriter use. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_CLANG_SERIALIZATION_LIB_AST_COMMON_H 15 #define LLVM_CLANG_SERIALIZATION_LIB_AST_COMMON_H 16 17 #include "clang/AST/ASTContext.h" 18 #include "clang/Serialization/ASTBitCodes.h" 19 20 namespace clang { 21 22 namespace serialization { 23 24 enum DeclUpdateKind { 25 UPD_CXX_ADDED_IMPLICIT_MEMBER, 26 UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION, 27 UPD_CXX_ADDED_ANONYMOUS_NAMESPACE, 28 UPD_CXX_INSTANTIATED_STATIC_DATA_MEMBER 29 }; 30 31 TypeIdx TypeIdxFromBuiltin(const BuiltinType *BT); 32 33 template <typename IdxForTypeTy> 34 TypeID MakeTypeID(ASTContext &Context, QualType T, IdxForTypeTy IdxForType) { 35 if (T.isNull()) 36 return PREDEF_TYPE_NULL_ID; 37 38 unsigned FastQuals = T.getLocalFastQualifiers(); 39 T.removeLocalFastQualifiers(); 40 41 if (T.hasLocalNonFastQualifiers()) 42 return IdxForType(T).asTypeID(FastQuals); 43 44 assert(!T.hasLocalQualifiers()); 45 46 if (const BuiltinType *BT = dyn_cast<BuiltinType>(T.getTypePtr())) 47 return TypeIdxFromBuiltin(BT).asTypeID(FastQuals); 48 49 if (T == Context.AutoDeductTy) 50 return TypeIdx(PREDEF_TYPE_AUTO_DEDUCT).asTypeID(FastQuals); 51 if (T == Context.AutoRRefDeductTy) 52 return TypeIdx(PREDEF_TYPE_AUTO_RREF_DEDUCT).asTypeID(FastQuals); 53 if (T == Context.VaListTagTy) 54 return TypeIdx(PREDEF_TYPE_VA_LIST_TAG).asTypeID(FastQuals); 55 56 return IdxForType(T).asTypeID(FastQuals); 57 } 58 59 unsigned ComputeHash(Selector Sel); 60 61 /// \brief Retrieve the "definitive" declaration that provides all of the 62 /// visible entries for the given declaration context, if there is one. 63 /// 64 /// The "definitive" declaration is the only place where we need to look to 65 /// find information about the declarations within the given declaration 66 /// context. For example, C++ and Objective-C classes, C structs/unions, and 67 /// Objective-C protocols, categories, and extensions are all defined in a 68 /// single place in the source code, so they have definitive declarations 69 /// associated with them. C++ namespaces, on the other hand, can have 70 /// multiple definitions. 71 const DeclContext *getDefinitiveDeclContext(const DeclContext *DC); 72 73 /// \brief Determine whether the given declaration kind is redeclarable. 74 bool isRedeclarableDeclKind(unsigned Kind); 75 76 } // namespace serialization 77 78 } // namespace clang 79 80 #endif 81
