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52 lines
1.4 KiB
C++
52 lines
1.4 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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/// \file rend.hpp
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/// Proto callables for boost::rend()
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//
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// Copyright 2012 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_PROTO_FUNCTIONAL_RANGE_REND_HPP_EAN_27_08_2012
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#define BOOST_PROTO_FUNCTIONAL_RANGE_REND_HPP_EAN_27_08_2012
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#include <boost/range/rend.hpp>
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#include <boost/proto/proto_fwd.hpp>
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namespace boost { namespace proto { namespace functional
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{
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// A PolymorphicFunctionObject that wraps boost::rend()
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struct rend
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{
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BOOST_PROTO_CALLABLE()
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template<typename Sig>
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struct result;
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template<typename This, typename Rng>
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struct result<This(Rng)>
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: boost::range_reverse_iterator<Rng const>
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{};
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template<typename This, typename Rng>
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struct result<This(Rng &)>
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: boost::range_reverse_iterator<Rng>
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{};
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template<typename Rng>
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typename boost::range_reverse_iterator<Rng>::type operator()(Rng &rng) const
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{
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return boost::rend(rng);
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}
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template<typename Rng>
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typename boost::range_reverse_iterator<Rng const>::type operator()(Rng const &rng) const
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{
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return boost::rend(rng);
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}
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};
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}}}
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#endif
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