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 20namespace clang { 21 22namespace serialization { 23 24enum 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 31TypeIdx TypeIdxFromBuiltin(const BuiltinType *BT); 32 33template <typename IdxForTypeTy> 34TypeID 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 59unsigned 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. 71const DeclContext *getDefinitiveDeclContext(const DeclContext *DC); 72 73/// \brief Determine whether the given declaration kind is redeclarable. 74bool isRedeclarableDeclKind(unsigned Kind); 75 76} // namespace serialization 77 78} // namespace clang 79 80#endif 81