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///////////////////////////////////////////////////////////////////////////////
/// \file push_front.hpp
/// Proto callables Fusion push_front
//
// Copyright 2010 Eric Niebler. 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_PROTO_FUNCTIONAL_FUSION_PUSH_FRONT_HPP_EAN_11_27_2010
#define BOOST_PROTO_FUNCTIONAL_FUSION_PUSH_FRONT_HPP_EAN_11_27_2010
#include <boost/type_traits/add_const.hpp>
#include <boost/type_traits/remove_const.hpp>
#include <boost/type_traits/remove_reference.hpp>
#include <boost/fusion/include/push_front.hpp>
#include <boost/proto/proto_fwd.hpp>
namespace boost { namespace proto { namespace functional
{
/// \brief A PolymorphicFunctionObject type that invokes the
/// \c fusion::push_front() algorithm on its argument.
///
/// A PolymorphicFunctionObject type that invokes the
/// \c fusion::push_front() algorithm on its argument.
struct push_front
{
BOOST_PROTO_CALLABLE()
template<typename Sig>
struct result;
template<typename This, typename Seq, typename T>
struct result<This(Seq, T)>
: fusion::result_of::push_front<
typename boost::add_const<typename boost::remove_reference<Seq>::type>::type
, typename boost::remove_const<typename boost::remove_reference<T>::type>::type
>
{};
template<typename Seq, typename T>
typename fusion::result_of::push_front<Seq const, T>::type
operator ()(Seq const &seq, T const &t) const
{
return fusion::push_front(seq, t);
}
};
}}}
#endif
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