/*=============================================================================
    Copyright (c) 2001-2014 Joel de Guzman
    Copyright (c) 2013 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_SFINAE_MAY_20_2013_0840AM)
#define BOOST_SPIRIT_X3_SFINAE_MAY_20_2013_0840AM

namespace boost {
namespace spirit {
namespace x3 {
template <typename Expr, typename T = void>
struct disable_if_substitution_failure
{
    typedef T type;
};

template <typename Expr, typename T>
struct lazy_disable_if_substitution_failure
{
    typedef typename T::type type;
};
}
}
}

#endif
