#ifndef BOOST_METAPARSE_V1_CPP98_IMPL_IS_NONE_HPP
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#define BOOST_METAPARSE_V1_CPP98_IMPL_IS_NONE_HPP
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// Copyright Abel Sinkovics (abel@sinkovics.hu) 2013.
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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/limit_one_char_except_size.hpp>
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#include <boost/mpl/eval_if.hpp>
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#include <boost/mpl/bool.hpp>
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#include <boost/preprocessor/cat.hpp>
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#include <boost/preprocessor/arithmetic/dec.hpp>
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#include <boost/preprocessor/repetition/enum_params.hpp>
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#include <boost/preprocessor/repetition/repeat_from_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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namespace impl
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{
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template <class Stub = int>
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struct is_none0
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{
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template <class C>
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struct apply : boost::mpl::true_ {};
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};
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#ifdef BOOST_METAPARSE_DEFINE_IS_NONE
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# error BOOST_METAPARSE_DEFINE_IS_NONE already defined
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#endif
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#define BOOST_METAPARSE_DEFINE_IS_NONE(z, n, unused) \
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template <BOOST_PP_ENUM_PARAMS(n, class T)> \
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struct BOOST_PP_CAT(is_none, n) \
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{ \
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template <class C> \
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struct apply : \
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boost::mpl::eval_if< \
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boost::mpl::bool_< \
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C::type::value \
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== BOOST_PP_CAT(T, BOOST_PP_DEC(n))::type::value \
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>, \
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boost::mpl::false_, \
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typename BOOST_PP_CAT(is_none, BOOST_PP_DEC(n))< \
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BOOST_PP_ENUM_PARAMS(BOOST_PP_DEC(n), T) \
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>::template apply<C> \
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> \
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{}; \
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};
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BOOST_PP_REPEAT_FROM_TO(
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1,
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BOOST_METAPARSE_LIMIT_ONE_CHAR_EXCEPT_SIZE,
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BOOST_METAPARSE_DEFINE_IS_NONE,
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~
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)
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#undef BOOST_METAPARSE_DEFINE_IS_NONE
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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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