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- ///////////////////////////////////////////////////////////////////////////////
- /// \file size.hpp
- /// Proto callables for boost::size()
- //
- // 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_SIZE_HPP_EAN_27_08_2012
- #define BOOST_PROTO_FUNCTIONAL_RANGE_SIZE_HPP_EAN_27_08_2012
- #include <boost/range/size.hpp>
- #include <boost/proto/proto_fwd.hpp>
- namespace boost { namespace proto { namespace functional
- {
- // A PolymorphicFunctionObject that wraps boost::size()
- struct size
- {
- BOOST_PROTO_CALLABLE()
- template<typename Sig>
- struct result;
- template<typename This, typename Rng>
- struct result<This(Rng)>
- : boost::range_size<Rng>
- {};
- template<typename This, typename Rng>
- struct result<This(Rng &)>
- : boost::range_size<Rng>
- {};
- template<typename Rng>
- typename boost::range_size<Rng>::type operator()(Rng const &rng) const
- {
- return boost::size(rng);
- }
- };
- }}}
- #endif
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