1 //===- ASTCommon.h - Common stuff for ASTReader/ASTWriter -*- C++ -*-=========//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines common functions that both ASTReader and ASTWriter use.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_CLANG_LIB_SERIALIZATION_ASTCOMMON_H
15 #define LLVM_CLANG_LIB_SERIALIZATION_ASTCOMMON_H
17 #include "clang/AST/ASTContext.h"
18 #include "clang/AST/DeclFriend.h"
19 #include "clang/Serialization/ASTBitCodes.h"
23 namespace serialization {
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,
38 UPD_STATIC_LOCAL_NUMBER,
39 UPD_DECL_MARKED_OPENMP_THREADPRIVATE,
41 UPD_ADDED_ATTR_TO_RECORD
44 TypeIdx TypeIdxFromBuiltin(const BuiltinType *BT);
46 template <typename IdxForTypeTy>
47 TypeID MakeTypeID(ASTContext &Context, QualType T, IdxForTypeTy IdxForType) {
49 return PREDEF_TYPE_NULL_ID;
51 unsigned FastQuals = T.getLocalFastQualifiers();
52 T.removeLocalFastQualifiers();
54 if (T.hasLocalNonFastQualifiers())
55 return IdxForType(T).asTypeID(FastQuals);
57 assert(!T.hasLocalQualifiers());
59 if (const BuiltinType *BT = dyn_cast<BuiltinType>(T.getTypePtr()))
60 return TypeIdxFromBuiltin(BT).asTypeID(FastQuals);
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);
67 return IdxForType(T).asTypeID(FastQuals);
70 unsigned ComputeHash(Selector Sel);
72 /// \brief Retrieve the "definitive" declaration that provides all of the
73 /// visible entries for the given declaration context, if there is one.
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.
82 const DeclContext *getDefinitiveDeclContext(const DeclContext *DC);
84 /// \brief Determine whether the given declaration kind is redeclarable.
85 bool isRedeclarableDeclKind(unsigned Kind);
87 /// \brief Determine whether the given declaration needs an anonymous
88 /// declaration number.
89 bool needsAnonymousDeclarationNumber(const NamedDecl *D);
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.
93 template<typename Fn> void numberAnonymousDeclsWithin(const DeclContext *DC,
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();
101 auto *ND = dyn_cast_or_null<NamedDecl>(LexicalD);
102 if (!ND || !needsAnonymousDeclarationNumber(ND))
109 } // namespace serialization