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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef TOOLS_GN_IMPORT_MANAGER_H_
#define TOOLS_GN_IMPORT_MANAGER_H_
#include <map>
#include "base/synchronization/lock.h"
class Err;
class ParseNode;
class Scope;
class SourceFile;
// Provides a cache of the results of importing scopes so the results can
// be re-used rather than running the imported files multiple times.
class ImportManager {
public:
ImportManager();
~ImportManager();
// Does an import of the given file into the given scope. On error, sets the
// error and returns false.
bool DoImport(const SourceFile& file,
const ParseNode* node_for_err,
Scope* scope,
Err* err);
private:
base::Lock lock_;
// Owning pointers to the scopes.
typedef std::map<SourceFile, const Scope*> ImportMap;
ImportMap imports_;
DISALLOW_COPY_AND_ASSIGN(ImportManager);
};
#endif // TOOLS_GN_IMPORT_MANAGER_H_
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