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/*=============================================================================
Copyright (c) 2001-2011 Joel de Guzman
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)
=============================================================================*/
#ifndef BOOST_SPIRIT_MAKE_CONS_OCTOBER_16_2008_1252PM
#define BOOST_SPIRIT_MAKE_CONS_OCTOBER_16_2008_1252PM
#if defined(_MSC_VER)
#pragma once
#endif
#include <boost/spirit/include/phoenix_limits.hpp> // needs to be included before proto
#include <boost/proto/proto.hpp>
#include <boost/mpl/eval_if.hpp>
#include <boost/fusion/include/cons.hpp>
#include <boost/type_traits/remove_const.hpp>
#include <boost/type_traits/is_abstract.hpp>
#include <boost/type_traits/is_function.hpp>
#include <boost/type_traits/add_reference.hpp>
#include <boost/utility/enable_if.hpp>
namespace boost { namespace spirit { namespace detail
{
template <typename T>
struct as_meta_element
: mpl::eval_if_c<is_abstract<T>::value || is_function<T>::value
, add_reference<T>, remove_const<T> >
{};
template <typename T>
struct as_meta_element<T&> : as_meta_element<T> // always store by value
{};
template <typename T, int N>
struct as_meta_element<T[N]>
{
typedef const T(&type)[N];
};
namespace result_of
{
template <typename Car, typename Cdr = fusion::nil>
struct make_cons
{
typedef typename as_meta_element<Car>::type car_type;
typedef typename fusion::cons<car_type, Cdr> type;
};
}
template <typename Car, typename Cdr>
fusion::cons<typename as_meta_element<Car>::type, Cdr>
make_cons(Car const& car, Cdr const& cdr)
{
typedef typename as_meta_element<Car>::type car_type;
typedef typename fusion::cons<car_type, Cdr> result;
return result(car, cdr);
}
template <typename Car>
fusion::cons<typename as_meta_element<Car>::type>
make_cons(Car const& car)
{
typedef typename as_meta_element<Car>::type car_type;
typedef typename fusion::cons<car_type> result;
return result(car);
}
#if defined(__GNUC__) && (__GNUC__ == 4) && (__GNUC_MINOR__ == 0)
// workaround for gcc-4.0 bug where illegal function types
// can be formed (const is added to function type)
// description: http://lists.boost.org/Archives/boost/2009/04/150743.php
template <typename Car>
fusion::cons<typename as_meta_element<Car>::type>
make_cons(Car& car, typename enable_if<is_function<Car> >::type* = 0)
{
typedef typename as_meta_element<Car>::type car_type;
typedef typename fusion::cons<car_type> result;
return result(car);
}
#endif
}}}
#endif
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