#ifndef BOOST_METAPARSE_V1_FAIL_AT_FIRST_CHAR_EXPECTED_HPP
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#define BOOST_METAPARSE_V1_FAIL_AT_FIRST_CHAR_EXPECTED_HPP
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// Copyright Abel Sinkovics (abel@sinkovics.hu) 2015.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#include <boost/metaparse/v1/impl/void_.hpp>
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#include <boost/metaparse/v1/accept.hpp>
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#include <boost/metaparse/v1/reject.hpp>
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#include <boost/metaparse/v1/is_error.hpp>
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#include <boost/metaparse/v1/get_position.hpp>
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#include <boost/metaparse/v1/error/expected_to_fail.hpp>
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#include <boost/mpl/eval_if.hpp>
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#include <boost/mpl/equal_to.hpp>
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namespace boost
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{
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namespace metaparse
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{
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namespace v1
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{
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template <class P>
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struct fail_at_first_char_expected
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{
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private:
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template <class S, class Pos>
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struct apply_err :
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boost::mpl::eval_if<
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typename boost::mpl::equal_to<
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Pos,
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typename get_position<typename P::template apply<S, Pos> >::type
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>::type,
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accept<impl::void_, S, Pos>,
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typename P::template apply<S, Pos>
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>
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{};
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public:
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typedef fail_at_first_char_expected type;
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template <class S, class Pos>
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struct apply :
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boost::mpl::eval_if<
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typename is_error<typename P::template apply<S, Pos> >::type,
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apply_err<S, Pos>,
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reject<error::expected_to_fail, Pos>
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>
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{};
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};
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}
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}
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}
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#endif
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