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/*//////////////////////////////////////////////////////////////////////////////
Copyright (c) 2014 Jamboree
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_X3_IS_CALLABLE_HPP_INCLUDED
#define BOOST_SPIRIT_X3_IS_CALLABLE_HPP_INCLUDED
#if defined(_MSC_VER)
#pragma once
#endif
#include <boost/utility/result_of.hpp>
#include <boost/mpl/bool.hpp>
#include <boost/spirit/home/x3/support/utility/sfinae.hpp>
namespace boost { namespace spirit { namespace x3 { namespace detail
{
template <typename Sig, typename Enable = void>
struct is_callable_impl
: mpl::false_
{};
template <typename F, typename... A>
struct is_callable_impl<F(A...), typename disable_if_substitution_failure<
typename result_of<F(A...)>::type>::type>
: mpl::true_
{};
}}}}
namespace boost { namespace spirit { namespace x3
{
template <typename Sig>
struct is_callable;
template <typename F, typename... A>
struct is_callable<F(A...)>
: detail::is_callable_impl<F(A...)>
{};
}}}
#endif
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