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Viewing changes to boost/property_tree/id_translator.hpp

  • Committer: Package Import Robot
  • Author(s): Steve M. Robbins
  • Date: 2012-02-26 00:31:44 UTC
  • Revision ID: package-import@ubuntu.com-20120226003144-eaytp12cbf6ubpms
Tags: upstream-1.49.0
Import upstream version 1.49.0

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