// ---------------------------------------------------------------------------- | |
// Copyright (C) 2009 Sebastian Redl | |
// | |
// Distributed under the Boost Software License, Version 1.0. | |
// (See accompanying file LICENSE_1_0.txt or copy at | |
// http://www.boost.org/LICENSE_1_0.txt) | |
// | |
// For more information, see www.boost.org | |
// ---------------------------------------------------------------------------- | |
#ifndef BOOST_PROPERTY_TREE_ID_TRANSLATOR_HPP_INCLUDED | |
#define BOOST_PROPERTY_TREE_ID_TRANSLATOR_HPP_INCLUDED | |
#include <boost/property_tree/ptree_fwd.hpp> | |
#include <boost/optional.hpp> | |
#include <string> | |
namespace boost { namespace property_tree | |
{ | |
/// Simple implementation of the Translator concept. It does no translation. | |
template <typename T> | |
struct id_translator | |
{ | |
typedef T internal_type; | |
typedef T external_type; | |
boost::optional<T> get_value(const T &v) { return v; } | |
boost::optional<T> put_value(const T &v) { return v; } | |
}; | |
// This is the default translator whenever you get two equal types. | |
template <typename T> | |
struct translator_between<T, T> | |
{ | |
typedef id_translator<T> type; | |
}; | |
// A more specific specialization for std::basic_string. Otherwise, | |
// stream_translator's specialization wins. | |
template <typename Ch, typename Traits, typename Alloc> | |
struct translator_between< std::basic_string<Ch, Traits, Alloc>, | |
std::basic_string<Ch, Traits, Alloc> > | |
{ | |
typedef id_translator< std::basic_string<Ch, Traits, Alloc> > type; | |
}; | |
}} | |
#endif |