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_ADDED_VAR_DEFINITION,
31 UPD_CXX_POINT_OF_INSTANTIATION,
32 UPD_CXX_INSTANTIATED_CLASS_DEFINITION,
33 UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT,
34 UPD_CXX_INSTANTIATED_DEFAULT_MEMBER_INITIALIZER,
35 UPD_CXX_RESOLVED_DTOR_DELETE,
36 UPD_CXX_RESOLVED_EXCEPTION_SPEC,
37 UPD_CXX_DEDUCED_RETURN_TYPE,
40 UPD_STATIC_LOCAL_NUMBER,
41 UPD_DECL_MARKED_OPENMP_THREADPRIVATE,
42 UPD_DECL_MARKED_OPENMP_DECLARETARGET,
44 UPD_ADDED_ATTR_TO_RECORD
47 TypeIdx TypeIdxFromBuiltin(const BuiltinType *BT);
49 template <typename IdxForTypeTy>
50 TypeID MakeTypeID(ASTContext &Context, QualType T, IdxForTypeTy IdxForType) {
52 return PREDEF_TYPE_NULL_ID;
54 unsigned FastQuals = T.getLocalFastQualifiers();
55 T.removeLocalFastQualifiers();
57 if (T.hasLocalNonFastQualifiers())
58 return IdxForType(T).asTypeID(FastQuals);
60 assert(!T.hasLocalQualifiers());
62 if (const BuiltinType *BT = dyn_cast<BuiltinType>(T.getTypePtr()))
63 return TypeIdxFromBuiltin(BT).asTypeID(FastQuals);
65 if (T == Context.AutoDeductTy)
66 return TypeIdx(PREDEF_TYPE_AUTO_DEDUCT).asTypeID(FastQuals);
67 if (T == Context.AutoRRefDeductTy)
68 return TypeIdx(PREDEF_TYPE_AUTO_RREF_DEDUCT).asTypeID(FastQuals);
70 return IdxForType(T).asTypeID(FastQuals);
73 unsigned ComputeHash(Selector Sel);
75 /// \brief Retrieve the "definitive" declaration that provides all of the
76 /// visible entries for the given declaration context, if there is one.
78 /// The "definitive" declaration is the only place where we need to look to
79 /// find information about the declarations within the given declaration
80 /// context. For example, C++ and Objective-C classes, C structs/unions, and
81 /// Objective-C protocols, categories, and extensions are all defined in a
82 /// single place in the source code, so they have definitive declarations
83 /// associated with them. C++ namespaces, on the other hand, can have
84 /// multiple definitions.
85 const DeclContext *getDefinitiveDeclContext(const DeclContext *DC);
87 /// \brief Determine whether the given declaration kind is redeclarable.
88 bool isRedeclarableDeclKind(unsigned Kind);
90 /// \brief Determine whether the given declaration needs an anonymous
91 /// declaration number.
92 bool needsAnonymousDeclarationNumber(const NamedDecl *D);
94 /// \brief Visit each declaration within \c DC that needs an anonymous
95 /// declaration number and call \p Visit with the declaration and its number.
96 template<typename Fn> void numberAnonymousDeclsWithin(const DeclContext *DC,
99 for (Decl *LexicalD : DC->decls()) {
100 // For a friend decl, we care about the declaration within it, if any.
101 if (auto *FD = dyn_cast<FriendDecl>(LexicalD))
102 LexicalD = FD->getFriendDecl();
104 auto *ND = dyn_cast_or_null<NamedDecl>(LexicalD);
105 if (!ND || !needsAnonymousDeclarationNumber(ND))
112 } // namespace serialization