Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: /// \file size.hpp
Chris@16: /// Proto callables for boost::size()
Chris@16: //
Chris@16: //  Copyright 2012 Eric Niebler. Distributed under the Boost
Chris@16: //  Software License, Version 1.0. (See accompanying file
Chris@16: //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: #ifndef BOOST_PROTO_FUNCTIONAL_RANGE_SIZE_HPP_EAN_27_08_2012
Chris@16: #define BOOST_PROTO_FUNCTIONAL_RANGE_SIZE_HPP_EAN_27_08_2012
Chris@16: 
Chris@16: #include <boost/range/size.hpp>
Chris@16: #include <boost/proto/proto_fwd.hpp>
Chris@16: 
Chris@16: namespace boost { namespace proto { namespace functional
Chris@16: {
Chris@16: 
Chris@16:     // A PolymorphicFunctionObject that wraps boost::size()
Chris@16:     struct size
Chris@16:     {
Chris@16:         BOOST_PROTO_CALLABLE()
Chris@16: 
Chris@16:         template<typename Sig>
Chris@16:         struct result;
Chris@16: 
Chris@16:         template<typename This, typename Rng>
Chris@16:         struct result<This(Rng)>
Chris@16:           : boost::range_size<Rng>
Chris@16:         {};
Chris@16: 
Chris@16:         template<typename This, typename Rng>
Chris@16:         struct result<This(Rng &)>
Chris@16:           : boost::range_size<Rng>
Chris@16:         {};
Chris@16: 
Chris@16:         template<typename Rng>
Chris@16:         typename boost::range_size<Rng>::type operator()(Rng const &rng) const
Chris@16:         {
Chris@16:             return boost::size(rng);
Chris@16:         }
Chris@16:     };
Chris@16: 
Chris@16: }}}
Chris@16: 
Chris@16: #endif