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///////////////////////////////////////////////////////////////////////////////
/// \file rbegin.hpp
/// Proto callables for boost::rbegin()
//
// Copyright 2012 Eric Niebler. 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)
#ifndef BOOST_PROTO_FUNCTIONAL_RANGE_RBEGIN_HPP_EAN_27_08_2012
#define BOOST_PROTO_FUNCTIONAL_RANGE_RBEGIN_HPP_EAN_27_08_2012
#include <boost/range/rbegin.hpp>
#include <boost/proto/proto_fwd.hpp>
namespace boost { namespace proto { namespace functional
{
// A PolymorphicFunctionObject that wraps boost::rbegin()
struct rbegin
{
BOOST_PROTO_CALLABLE()
template<typename Sig>
struct result;
template<typename This, typename Rng>
struct result<This(Rng)>
: boost::range_reverse_iterator<Rng const>
{};
template<typename This, typename Rng>
struct result<This(Rng &)>
: boost::range_reverse_iterator<Rng>
{};
template<typename Rng>
typename boost::range_reverse_iterator<Rng>::type operator()(Rng &rng) const
{
return boost::rbegin(rng);
}
template<typename Rng>
typename boost::range_reverse_iterator<Rng const>::type operator()(Rng const &rng) const
{
return boost::rbegin(rng);
}
};
}}}
#endif
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