| // ---------------------------------------------------------------------------- |
| // 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 |