C++ IntrusiveRefCntPtr::getFinalReader方法代码示例

//.........这里部分代码省略.........
  // Set up the preprocessor.
  CI.createPreprocessor(getTranslationUnitKind());

  // Inform the diagnostic client we are processing a source file.
  CI.getDiagnosticClient().BeginSourceFile(CI.getLangOpts(),
                                           &CI.getPreprocessor());
  HasBegunSourceFile = true;

  // Initialize the action.
  if (!BeginSourceFileAction(CI, InputFile))
    goto failure;

  // Initialize the main file entry. It is important that this occurs after
  // BeginSourceFileAction, which may change CurrentInput during module builds.
  if (!CI.InitializeSourceManager(CurrentInput))
    goto failure;

  // Create the AST context and consumer unless this is a preprocessor only
  // action.
  if (!usesPreprocessorOnly()) {
    CI.createASTContext();

    std::unique_ptr<ASTConsumer> Consumer(
        CreateWrappedASTConsumer(CI, InputFile));
    if (!Consumer)
      goto failure;

    CI.getASTContext().setASTMutationListener(Consumer->GetASTMutationListener());
    
    if (!CI.getPreprocessorOpts().ChainedIncludes.empty()) {
      // Convert headers to PCH and chain them.
      IntrusiveRefCntPtr<ChainedIncludesSource> source;
      source = ChainedIncludesSource::create(CI);
      if (!source)
        goto failure;
      CI.setModuleManager(static_cast<ASTReader*>(&source->getFinalReader()));
      CI.getASTContext().setExternalSource(source);

    } else if (!CI.getPreprocessorOpts().ImplicitPCHInclude.empty()) {
      // Use PCH.
      assert(hasPCHSupport() && "This action does not have PCH support!");
      ASTDeserializationListener *DeserialListener =
          Consumer->GetASTDeserializationListener();
      if (CI.getPreprocessorOpts().DumpDeserializedPCHDecls)
        DeserialListener = new DeserializedDeclsDumper(DeserialListener);
      if (!CI.getPreprocessorOpts().DeserializedPCHDeclsToErrorOn.empty())
        DeserialListener = new DeserializedDeclsChecker(CI.getASTContext(),
                         CI.getPreprocessorOpts().DeserializedPCHDeclsToErrorOn,
                                                        DeserialListener);
      CI.createPCHExternalASTSource(
                                CI.getPreprocessorOpts().ImplicitPCHInclude,
                                CI.getPreprocessorOpts().DisablePCHValidation,
                            CI.getPreprocessorOpts().AllowPCHWithCompilerErrors,
                                DeserialListener);
      if (!CI.getASTContext().getExternalSource())
        goto failure;
    }

    CI.setASTConsumer(Consumer.release());
    if (!CI.hasASTConsumer())
      goto failure;
  }

  // Initialize built-in info as long as we aren't using an external AST
  // source.
  if (!CI.hasASTContext() || !CI.getASTContext().getExternalSource()) {
    Preprocessor &PP = CI.getPreprocessor();
    PP.getBuiltinInfo().InitializeBuiltins(PP.getIdentifierTable(),
                                           PP.getLangOpts());
  }

  // If there is a layout overrides file, attach an external AST source that
  // provides the layouts from that file.
  if (!CI.getFrontendOpts().OverrideRecordLayoutsFile.empty() && 
      CI.hasASTContext() && !CI.getASTContext().getExternalSource()) {
    IntrusiveRefCntPtr<ExternalASTSource> 
      Override(new LayoutOverrideSource(
                     CI.getFrontendOpts().OverrideRecordLayoutsFile));
    CI.getASTContext().setExternalSource(Override);
  }
  
  return true;

  // If we failed, reset state since the client will not end up calling the
  // matching EndSourceFile().
  failure:
  if (isCurrentFileAST()) {
    CI.setASTContext(0);
    CI.setPreprocessor(0);
    CI.setSourceManager(0);
    CI.setFileManager(0);
  }

  if (HasBegunSourceFile)
    CI.getDiagnosticClient().EndSourceFile();
  CI.clearOutputFiles(/*EraseFiles=*/true);
  setCurrentInput(FrontendInputFile());
  setCompilerInstance(0);
  return false;
}