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Diffstat (limited to 'boost/spirit/home/x3/support/traits/is_parser.hpp')
| -rw-r--r-- | boost/spirit/home/x3/support/traits/is_parser.hpp | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/boost/spirit/home/x3/support/traits/is_parser.hpp b/boost/spirit/home/x3/support/traits/is_parser.hpp new file mode 100644 index 0000000000..cfbe8f74b4 --- /dev/null +++ b/boost/spirit/home/x3/support/traits/is_parser.hpp @@ -0,0 +1,37 @@ +/*============================================================================= + 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 + +#if defined(_MSC_VER) +#pragma once +#endif + +#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 |