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 UPD_CXX_DEDUCED_RETURN_TYPE, 30 UPD_DECL_MARKED_USED 31 }; 32 33 TypeIdx TypeIdxFromBuiltin(const BuiltinType *BT); 34 35 template <typename IdxForTypeTy> 36 TypeID MakeTypeID(ASTContext &Context, QualType T, IdxForTypeTy IdxForType) { 37 if (T.isNull()) 38 return PREDEF_TYPE_NULL_ID; 39 40 unsigned FastQuals = T.getLocalFastQualifiers(); 41 T.removeLocalFastQualifiers(); 42 43 if (T.hasLocalNonFastQualifiers()) 44 return IdxForType(T).asTypeID(FastQuals); 45 46 assert(!T.hasLocalQualifiers()); 47 48 if (const BuiltinType *BT = dyn_cast<BuiltinType>(T.getTypePtr())) 49 return TypeIdxFromBuiltin(BT).asTypeID(FastQuals); 50 51 if (T == Context.AutoDeductTy) 52 return TypeIdx(PREDEF_TYPE_AUTO_DEDUCT).asTypeID(FastQuals); 53 if (T == Context.AutoRRefDeductTy) 54 return TypeIdx(PREDEF_TYPE_AUTO_RREF_DEDUCT).asTypeID(FastQuals); 55 if (T == Context.VaListTagTy) 56 return TypeIdx(PREDEF_TYPE_VA_LIST_TAG).asTypeID(FastQuals); 57 58 return IdxForType(T).asTypeID(FastQuals); 59 } 60 61 unsigned ComputeHash(Selector Sel); 62 63 /// \brief Retrieve the "definitive" declaration that provides all of the 64 /// visible entries for the given declaration context, if there is one. 65 /// 66 /// The "definitive" declaration is the only place where we need to look to 67 /// find information about the declarations within the given declaration 68 /// context. For example, C++ and Objective-C classes, C structs/unions, and 69 /// Objective-C protocols, categories, and extensions are all defined in a 70 /// single place in the source code, so they have definitive declarations 71 /// associated with them. C++ namespaces, on the other hand, can have 72 /// multiple definitions. 73 const DeclContext *getDefinitiveDeclContext(const DeclContext *DC); 74 75 /// \brief Determine whether the given declaration kind is redeclarable. 76 bool isRedeclarableDeclKind(unsigned Kind); 77 78 } // namespace serialization 79 80 } // namespace clang 81 82 #endif 83