1/*=============================================================================
2 Copyright (c) 2001-2014 Joel de Guzman
3 Copyright (c) 2014 Agustin Berge
4
5 Distributed under the Boost Software License, Version 1.0. (See accompanying
6 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
7==============================================================================*/
8#if !defined(BOOST_SPIRIT_X3_IS_PARSER_MAY_20_2013_0235PM)
9#define BOOST_SPIRIT_X3_IS_PARSER_MAY_20_2013_0235PM
10
11#include <boost/mpl/bool.hpp>
12#include <boost/spirit/home/x3/core/parser.hpp>
13#include <boost/spirit/home/x3/support/utility/sfinae.hpp>
14
15namespace boost { namespace spirit { namespace x3 { namespace traits
16{
17 ///////////////////////////////////////////////////////////////////////////
18 // is_parser<T>: metafunction that evaluates to mpl::true_ if a type T
19 // can be used as a parser, mpl::false_ otherwise
20 ///////////////////////////////////////////////////////////////////////////
21 template <typename T, typename Enable = void>
22 struct is_parser
23 : mpl::false_
24 {};
25
26 template <typename T>
27 struct is_parser<T, typename disable_if_substitution_failure<
28 typename extension::as_parser<T>::type>::type>
29 : mpl::true_
30 {};
31}}}}
32
33#endif
34

source code of boost/libs/spirit/include/boost/spirit/home/x3/support/traits/is_parser.hpp