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109 lines
3.1 KiB
109 lines
3.1 KiB
///////////////////////////////////////////////////////////////////////////////
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// any.hpp
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//
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// Copyright 2008 Eric Niebler. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_XPRESSIVE_DETAIL_UTILITY_ANY_HPP_EAN_11_19_2005
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#define BOOST_XPRESSIVE_DETAIL_UTILITY_ANY_HPP_EAN_11_19_2005
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#include <boost/version.hpp>
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#if BOOST_VERSION >= 103300
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// In Boost 1.33+, we have a cons list in Fusion, so just include it.
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# if BOOST_VERSION >= 103500
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# include <boost/fusion/include/any.hpp> // Boost 1.35+ has Fusion2
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# else
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# include <boost/spirit/fusion/algorithm/any.hpp> // Fusion1
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# endif
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#else
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# include <boost/spirit/fusion/sequence/begin.hpp>
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# include <boost/spirit/fusion/sequence/end.hpp>
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# include <boost/spirit/fusion/iterator/equal_to.hpp>
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# include <boost/mpl/bool.hpp>
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# include <boost/spirit/fusion/iterator/equal_to.hpp>
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# include <boost/spirit/fusion/iterator/next.hpp>
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# include <boost/spirit/fusion/iterator/deref.hpp>
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namespace boost { namespace fusion
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{
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namespace detail
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{
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template <typename First, typename Last, typename F>
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inline bool
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any(First const&, Last const&, F const&, mpl::true_)
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{
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return false;
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}
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template <typename First, typename Last, typename F>
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inline bool
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any(First const& first, Last const& last, F const& f, mpl::false_)
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{
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if(f(*first))
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return true;
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return detail::any(fusion::next(first), last, f
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, meta::equal_to<BOOST_DEDUCED_TYPENAME meta::next<First>::type, Last>());
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}
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}
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namespace meta
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{
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template <typename Sequence, typename F>
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struct any
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{
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typedef bool type;
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};
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}
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namespace function
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{
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struct any
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{
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template <typename Sequence, typename F>
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struct apply
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{
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typedef bool type;
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};
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template <typename Sequence, typename F>
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inline bool
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operator()(Sequence const& seq, F const& f) const
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{
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return detail::any(
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fusion::begin(seq)
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, fusion::end(seq)
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, f
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, meta::equal_to<
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BOOST_DEDUCED_TYPENAME meta::begin<Sequence>::type
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, BOOST_DEDUCED_TYPENAME meta::end<Sequence>::type>());
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}
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template <typename Sequence, typename F>
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inline bool
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operator()(Sequence& seq, F const& f) const
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{
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return detail::any(
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fusion::begin(seq)
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, fusion::end(seq)
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, f
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, meta::equal_to<
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BOOST_DEDUCED_TYPENAME meta::begin<Sequence>::type
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, BOOST_DEDUCED_TYPENAME meta::end<Sequence>::type>());
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}
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};
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}
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function::any const any = function::any();
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}}
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#endif
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#endif
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