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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
- #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<
- decltype(std::declval<F>()(std::declval<A>()...))>::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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