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- /*=============================================================================
- 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
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