Пример #1
0
void StoredDeclsList::materializeDecls(ASTContext &Context) {
  if (isNull())
    return;

  switch ((DataKind)(Data & 0x03)) {
  case DK_Decl:
  case DK_Decl_Vector:
    break;

  case DK_DeclID: {
    // Resolve this declaration ID to an actual declaration by
    // querying the external AST source.
    unsigned DeclID = Data >> 2;

    ExternalASTSource *Source = Context.getExternalSource();
    assert(Source && "No external AST source available!");

    Data = reinterpret_cast<uintptr_t>(Source->GetDecl(DeclID));
    break;
  }

  case DK_ID_Vector: {
    // We have a vector of declaration IDs. Resolve all of them to
    // actual declarations.
    VectorTy &Vector = *getAsVector();
    ExternalASTSource *Source = Context.getExternalSource();
    assert(Source && "No external AST source available!");

    for (unsigned I = 0, N = Vector.size(); I != N; ++I)
      Vector[I] = reinterpret_cast<uintptr_t>(Source->GetDecl(Vector[I]));

    Data = (Data & ~0x03) | DK_Decl_Vector;
    break;
  }
  }
}
Пример #2
0
/// \brief Load the declarations within this lexical storage from an
/// external source.
void
DeclContext::LoadLexicalDeclsFromExternalStorage() const {
  ExternalASTSource *Source = getParentASTContext().getExternalSource();
  assert(hasExternalLexicalStorage() && Source && "No external storage?");

  llvm::SmallVector<uint32_t, 64> Decls;
  if (Source->ReadDeclsLexicallyInContext(const_cast<DeclContext *>(this),
                                          Decls))
    return;

  // There is no longer any lexical storage in this context
  ExternalLexicalStorage = false;

  if (Decls.empty())
    return;

  // Resolve all of the declaration IDs into declarations, building up
  // a chain of declarations via the Decl::NextDeclInContext field.
  Decl *FirstNewDecl = 0;
  Decl *PrevDecl = 0;
  for (unsigned I = 0, N = Decls.size(); I != N; ++I) {
    Decl *D = Source->GetDecl(Decls[I]);
    if (PrevDecl)
      PrevDecl->NextDeclInContext = D;
    else
      FirstNewDecl = D;

    PrevDecl = D;
  }

  // Splice the newly-read declarations into the beginning of the list
  // of declarations.
  PrevDecl->NextDeclInContext = FirstDecl;
  FirstDecl = FirstNewDecl;
  if (!LastDecl)
    LastDecl = PrevDecl;
}