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_LIB_SERIALIZATION_ASTCOMMON_H 15#define LLVM_CLANG_LIB_SERIALIZATION_ASTCOMMON_H 16 17#include "clang/AST/ASTContext.h" 18#include "clang/AST/DeclFriend.h" 19#include "clang/Serialization/ASTBitCodes.h" 20 21namespace clang { 22 23namespace serialization { 24 25enum DeclUpdateKind { 26 UPD_CXX_ADDED_IMPLICIT_MEMBER, 27 UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION, 28 UPD_CXX_ADDED_ANONYMOUS_NAMESPACE, 29 UPD_CXX_ADDED_FUNCTION_DEFINITION, 30 UPD_CXX_INSTANTIATED_STATIC_DATA_MEMBER, 31 UPD_CXX_INSTANTIATED_CLASS_DEFINITION, 32 UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT, 33 UPD_CXX_RESOLVED_DTOR_DELETE, 34 UPD_CXX_RESOLVED_EXCEPTION_SPEC, 35 UPD_CXX_DEDUCED_RETURN_TYPE, 36 UPD_DECL_MARKED_USED, 37 UPD_MANGLING_NUMBER, 38 UPD_STATIC_LOCAL_NUMBER, 39 UPD_DECL_MARKED_OPENMP_THREADPRIVATE, 40 UPD_DECL_EXPORTED, 41 UPD_ADDED_ATTR_TO_RECORD 42}; 43 44TypeIdx TypeIdxFromBuiltin(const BuiltinType *BT); 45 46template <typename IdxForTypeTy> 47TypeID MakeTypeID(ASTContext &Context, QualType T, IdxForTypeTy IdxForType) { 48 if (T.isNull()) 49 return PREDEF_TYPE_NULL_ID; 50 51 unsigned FastQuals = T.getLocalFastQualifiers(); 52 T.removeLocalFastQualifiers(); 53 54 if (T.hasLocalNonFastQualifiers()) 55 return IdxForType(T).asTypeID(FastQuals); 56 57 assert(!T.hasLocalQualifiers()); 58 59 if (const BuiltinType *BT = dyn_cast<BuiltinType>(T.getTypePtr())) 60 return TypeIdxFromBuiltin(BT).asTypeID(FastQuals); 61 62 if (T == Context.AutoDeductTy) 63 return TypeIdx(PREDEF_TYPE_AUTO_DEDUCT).asTypeID(FastQuals); 64 if (T == Context.AutoRRefDeductTy) 65 return TypeIdx(PREDEF_TYPE_AUTO_RREF_DEDUCT).asTypeID(FastQuals); 66 67 return IdxForType(T).asTypeID(FastQuals); 68} 69 70unsigned ComputeHash(Selector Sel); 71 72/// \brief Retrieve the "definitive" declaration that provides all of the 73/// visible entries for the given declaration context, if there is one. 74/// 75/// The "definitive" declaration is the only place where we need to look to 76/// find information about the declarations within the given declaration 77/// context. For example, C++ and Objective-C classes, C structs/unions, and 78/// Objective-C protocols, categories, and extensions are all defined in a 79/// single place in the source code, so they have definitive declarations 80/// associated with them. C++ namespaces, on the other hand, can have 81/// multiple definitions. 82const DeclContext *getDefinitiveDeclContext(const DeclContext *DC); 83 84/// \brief Determine whether the given declaration kind is redeclarable. 85bool isRedeclarableDeclKind(unsigned Kind); 86 87/// \brief Determine whether the given declaration needs an anonymous 88/// declaration number. 89bool needsAnonymousDeclarationNumber(const NamedDecl *D); 90 91/// \brief Visit each declaration within \c DC that needs an anonymous 92/// declaration number and call \p Visit with the declaration and its number. 93template<typename Fn> void numberAnonymousDeclsWithin(const DeclContext *DC, 94 Fn Visit) { 95 unsigned Index = 0; 96 for (Decl *LexicalD : DC->decls()) { 97 // For a friend decl, we care about the declaration within it, if any. 98 if (auto *FD = dyn_cast<FriendDecl>(LexicalD)) 99 LexicalD = FD->getFriendDecl(); 100 101 auto *ND = dyn_cast_or_null<NamedDecl>(LexicalD); 102 if (!ND || !needsAnonymousDeclarationNumber(ND)) 103 continue; 104 105 Visit(ND, Index++); 106 } 107} 108 109} // namespace serialization 110 111} // namespace clang 112 113#endif 114