boost/spirit/fusion/detail/access.hpp
/*=============================================================================
Copyright (c) 2003 Joel de Guzman
Use, modification and distribution is subject to 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(FUSION_DETAIL_ACCESS_HPP)
#define FUSION_DETAIL_ACCESS_HPP
#include <boost/spirit/fusion/detail/config.hpp>
#include <boost/mpl/eval_if.hpp>
#include <boost/mpl/identity.hpp>
#include <boost/type_traits/add_const.hpp>
#include <boost/type_traits/add_reference.hpp>
#include <boost/type_traits/is_reference.hpp>
#include <boost/type_traits/remove_cv.hpp>
namespace boost { namespace fusion { namespace detail
{
template <typename T>
struct ref_result
{
typedef typename add_reference<FUSION_GET_TYPE(T)>::type type;
};
template <typename T>
struct cref_result
{
typedef typename add_reference<
typename add_const<FUSION_GET_TYPE(T)>::type
>::type type;
};
template <typename T>
struct non_ref_parameter
{
typedef typename boost::remove_cv<T>::type const& type;
};
template <typename T>
struct call_param
{
typedef
typename mpl::eval_if<
is_reference<T>
, mpl::identity<T>
, non_ref_parameter<T>
>::type
type;
};
}}}
#endif
