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- #ifndef BOOST_METAPARSE_V1_FAIL_AT_FIRST_CHAR_EXPECTED_HPP
- #define BOOST_METAPARSE_V1_FAIL_AT_FIRST_CHAR_EXPECTED_HPP
- // Copyright Abel Sinkovics (abel@sinkovics.hu) 2015.
- // 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)
- #include <boost/metaparse/v1/impl/void_.hpp>
- #include <boost/metaparse/v1/accept.hpp>
- #include <boost/metaparse/v1/reject.hpp>
- #include <boost/metaparse/v1/is_error.hpp>
- #include <boost/metaparse/v1/get_position.hpp>
- #include <boost/metaparse/v1/error/expected_to_fail.hpp>
- #include <boost/mpl/eval_if.hpp>
- #include <boost/mpl/equal_to.hpp>
- namespace boost
- {
- namespace metaparse
- {
- namespace v1
- {
- template <class P>
- struct fail_at_first_char_expected
- {
- private:
- template <class S, class Pos>
- struct apply_err :
- boost::mpl::eval_if<
- typename boost::mpl::equal_to<
- Pos,
- typename get_position<typename P::template apply<S, Pos> >::type
- >::type,
- accept<impl::void_, S, Pos>,
- typename P::template apply<S, Pos>
- >
- {};
- public:
- typedef fail_at_first_char_expected type;
- template <class S, class Pos>
- struct apply :
- boost::mpl::eval_if<
- typename is_error<typename P::template apply<S, Pos> >::type,
- apply_err<S, Pos>,
- reject<error::expected_to_fail, Pos>
- >
- {};
- };
- }
- }
- }
- #endif
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