contrib/llvm/tools/clang/lib/Serialization/ASTCommon.h

   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
  20 namespace clang {
  21
  22 namespace serialization {
  23
  24 enum 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   UPD_CXX_INSTANTIATED_FUNCTION_DEFINITION,
  30   UPD_CXX_INSTANTIATED_CLASS_DEFINITION,
  31   UPD_CXX_RESOLVED_EXCEPTION_SPEC,
  32   UPD_CXX_DEDUCED_RETURN_TYPE,
  33   UPD_DECL_MARKED_USED,
  34   UPD_MANGLING_NUMBER,
  35   UPD_STATIC_LOCAL_NUMBER
  36 };
  37
  38 TypeIdx TypeIdxFromBuiltin(const BuiltinType *BT);
  39
  40 template <typename IdxForTypeTy>
  41 TypeID MakeTypeID(ASTContext &Context, QualType T, IdxForTypeTy IdxForType) {
  42   if (T.isNull())
  43     return PREDEF_TYPE_NULL_ID;
  44
  45   unsigned FastQuals = T.getLocalFastQualifiers();
  46   T.removeLocalFastQualifiers();
  47
  48   if (T.hasLocalNonFastQualifiers())
  49     return IdxForType(T).asTypeID(FastQuals);
  50
  51   assert(!T.hasLocalQualifiers());
  52
  53   if (const BuiltinType *BT = dyn_cast<BuiltinType>(T.getTypePtr()))
  54     return TypeIdxFromBuiltin(BT).asTypeID(FastQuals);
  55
  56   if (T == Context.AutoDeductTy)
  57     return TypeIdx(PREDEF_TYPE_AUTO_DEDUCT).asTypeID(FastQuals);
  58   if (T == Context.AutoRRefDeductTy)
  59     return TypeIdx(PREDEF_TYPE_AUTO_RREF_DEDUCT).asTypeID(FastQuals);
  60   if (T == Context.VaListTagTy)
  61     return TypeIdx(PREDEF_TYPE_VA_LIST_TAG).asTypeID(FastQuals);
  62
  63   return IdxForType(T).asTypeID(FastQuals);
  64 }
  65
  66 unsigned ComputeHash(Selector Sel);
  67
  68 /// \brief Retrieve the "definitive" declaration that provides all of the
  69 /// visible entries for the given declaration context, if there is one.
  70 ///
  71 /// The "definitive" declaration is the only place where we need to look to
  72 /// find information about the declarations within the given declaration
  73 /// context. For example, C++ and Objective-C classes, C structs/unions, and
  74 /// Objective-C protocols, categories, and extensions are all defined in a
  75 /// single place in the source code, so they have definitive declarations
  76 /// associated with them. C++ namespaces, on the other hand, can have
  77 /// multiple definitions.
  78 const DeclContext *getDefinitiveDeclContext(const DeclContext *DC);
  79
  80 /// \brief Determine whether the given declaration kind is redeclarable.
  81 bool isRedeclarableDeclKind(unsigned Kind);
  82
  83 } // namespace serialization
  84
  85 } // namespace clang
  86
  87 #endif