boost/xpressive/detail/static/transforms/as_sequence.hpp
///////////////////////////////////////////////////////////////////////////////
// as_sequence.hpp
//
// Copyright 2008 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_XPRESSIVE_DETAIL_STATIC_TRANSFORMS_AS_SEQUENCE_HPP_EAN_04_01_2007
#define BOOST_XPRESSIVE_DETAIL_STATIC_TRANSFORMS_AS_SEQUENCE_HPP_EAN_04_01_2007
// MS compatible compilers support #pragma once
#if defined(_MSC_VER) && (_MSC_VER >= 1020)
# pragma once
#endif
#include <boost/mpl/assert.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/xpressive/detail/detail_fwd.hpp>
#include <boost/xpressive/detail/static/static.hpp>
namespace boost { namespace xpressive { namespace grammar_detail
{
template<typename Grammar>
struct in_sequence : proto::callable
{
template<typename Sig> struct result {};
template<typename This, typename Expr, typename State, typename Visitor>
struct result<This(Expr, State, Visitor)>
{
typedef detail::static_xpression<
typename Grammar::template result<void(Expr, State, Visitor)>::type
, State
> type;
};
template<typename Expr, typename State, typename Visitor>
typename result<void(Expr, State, Visitor)>::type
operator ()(Expr const &expr, State const &state, Visitor &visitor) const
{
return typename result<void(Expr, State, Visitor)>::type(
Grammar()(expr, state, visitor)
, state
);
}
};
}}}
#endif