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 21 namespace clang { 22 23 namespace serialization { 24 25 enum 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_MARKED_OPENMP_DECLARETARGET, 41 UPD_DECL_EXPORTED, 42 UPD_ADDED_ATTR_TO_RECORD 43 }; 44 45 TypeIdx TypeIdxFromBuiltin(const BuiltinType *BT); 46 47 template <typename IdxForTypeTy> 48 TypeID MakeTypeID(ASTContext &Context, QualType T, IdxForTypeTy IdxForType) { 49 if (T.isNull()) 50 return PREDEF_TYPE_NULL_ID; 51 52 unsigned FastQuals = T.getLocalFastQualifiers(); 53 T.removeLocalFastQualifiers(); 54 55 if (T.hasLocalNonFastQualifiers()) 56 return IdxForType(T).asTypeID(FastQuals); 57 58 assert(!T.hasLocalQualifiers()); 59 60 if (const BuiltinType *BT = dyn_cast<BuiltinType>(T.getTypePtr())) 61 return TypeIdxFromBuiltin(BT).asTypeID(FastQuals); 62 63 if (T == Context.AutoDeductTy) 64 return TypeIdx(PREDEF_TYPE_AUTO_DEDUCT).asTypeID(FastQuals); 65 if (T == Context.AutoRRefDeductTy) 66 return TypeIdx(PREDEF_TYPE_AUTO_RREF_DEDUCT).asTypeID(FastQuals); 67 68 return IdxForType(T).asTypeID(FastQuals); 69 } 70 71 unsigned ComputeHash(Selector Sel); 72 73 /// \brief Retrieve the "definitive" declaration that provides all of the 74 /// visible entries for the given declaration context, if there is one. 75 /// 76 /// The "definitive" declaration is the only place where we need to look to 77 /// find information about the declarations within the given declaration 78 /// context. For example, C++ and Objective-C classes, C structs/unions, and 79 /// Objective-C protocols, categories, and extensions are all defined in a 80 /// single place in the source code, so they have definitive declarations 81 /// associated with them. C++ namespaces, on the other hand, can have 82 /// multiple definitions. 83 const DeclContext *getDefinitiveDeclContext(const DeclContext *DC); 84 85 /// \brief Determine whether the given declaration kind is redeclarable. 86 bool isRedeclarableDeclKind(unsigned Kind); 87 88 /// \brief Determine whether the given declaration needs an anonymous 89 /// declaration number. 90 bool needsAnonymousDeclarationNumber(const NamedDecl *D); 91 92 /// \brief Visit each declaration within \c DC that needs an anonymous 93 /// declaration number and call \p Visit with the declaration and its number. 94 template<typename Fn> void numberAnonymousDeclsWithin(const DeclContext *DC, 95 Fn Visit) { 96 unsigned Index = 0; 97 for (Decl *LexicalD : DC->decls()) { 98 // For a friend decl, we care about the declaration within it, if any. 99 if (auto *FD = dyn_cast<FriendDecl>(LexicalD)) 100 LexicalD = FD->getFriendDecl(); 101 102 auto *ND = dyn_cast_or_null<NamedDecl>(LexicalD); 103 if (!ND || !needsAnonymousDeclarationNumber(ND)) 104 continue; 105 106 Visit(ND, Index++); 107 } 108 } 109 110 } // namespace serialization 111 112 } // namespace clang 113 114 #endif 115
