52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
// ----------------------------------------------------------------------------
|
|
// 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
|