/*//////////////////////////////////////////////////////////////////////////////
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Copyright (c) 2014 Jamboree
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//////////////////////////////////////////////////////////////////////////////*/
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#ifndef BOOST_SPIRIT_X3_IS_CALLABLE_HPP_INCLUDED
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#define BOOST_SPIRIT_X3_IS_CALLABLE_HPP_INCLUDED
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#include <boost/mpl/bool.hpp>
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#include <boost/spirit/home/x3/support/utility/sfinae.hpp>
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namespace boost { namespace spirit { namespace x3 { namespace detail
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{
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template <typename Sig, typename Enable = void>
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struct is_callable_impl : mpl::false_ {};
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template <typename F, typename... A>
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struct is_callable_impl<F(A...), typename disable_if_substitution_failure<
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decltype(std::declval<F>()(std::declval<A>()...))>::type>
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: mpl::true_
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{};
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}}}}
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namespace boost { namespace spirit { namespace x3
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{
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template <typename Sig>
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struct is_callable;
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template <typename F, typename... A>
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struct is_callable<F(A...)> : detail::is_callable_impl<F(A...)> {};
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}}}
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#endif
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