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/*=============================================================================
Copyright (c) 2001-2014 Joel de Guzman
Copyright (c) 2001-2012 Hartmut Kaiser
http://spirit.sourceforge.net/
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)
=============================================================================*/
#if !defined(BOOST_SPIRIT_X3_ATTRIBUTE_TRANSFORM_JAN_8_2012_0721PM)
#define BOOST_SPIRIT_X3_ATTRIBUTE_TRANSFORM_JAN_8_2012_0721PM
#include <boost/mpl/identity.hpp>
namespace boost { namespace spirit { namespace x3 { namespace traits
{
///////////////////////////////////////////////////////////////////////////
// transform_attribute
//
// Sometimes the user needs to transform the attribute types for certain
// attributes. This template can be used as a customization point, where
// the user is able specify specific transformation rules for any attribute
// type.
///////////////////////////////////////////////////////////////////////////
template <typename Exposed, typename Transformed, typename Tag
, typename Enable = void>
struct transform_attribute;
///////////////////////////////////////////////////////////////////////////
template <typename Tag, typename Transformed, typename Exposed>
typename transform_attribute<Exposed, Transformed, Tag>::type
pre_transform(Exposed& attr)
{
return transform_attribute<Exposed, Transformed, Tag>::pre(attr);
}
template <typename Tag, typename Transformed, typename Exposed>
typename transform_attribute<Exposed, Transformed, Tag>::type
pre_transform(Exposed const& attr)
{
return transform_attribute<Exposed const, Transformed, Tag>::pre(attr);
}
}}}}
#endif
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