/*=============================================================================
    Copyright (c) 2001-2014 Joel de Guzman
    Copyright (c) 2014 Agustin Berge

    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_IS_PARSER_MAY_20_2013_0235PM)
#define BOOST_SPIRIT_X3_IS_PARSER_MAY_20_2013_0235PM

#include <boost/mpl/bool.hpp>
#include <boost/spirit/home/x3/core/parser.hpp>
#include <boost/spirit/home/x3/support/utility/sfinae.hpp>

namespace boost {
namespace spirit {
namespace x3 {
namespace traits {
///////////////////////////////////////////////////////////////////////////
// is_parser<T>: metafunction that evaluates to mpl::true_ if a type T
// can be used as a parser, mpl::false_ otherwise
///////////////////////////////////////////////////////////////////////////
template <typename T, typename Enable = void>
struct is_parser
    : mpl::false_
{};

template <typename T>
struct is_parser<T, typename disable_if_substitution_failure<
    typename extension::as_parser<T>::type>::type>
    : mpl::true_
{};
}
}
}
}

#endif
