Chris@16: // Boost.Range library
Chris@16: //
Chris@16: //  Copyright Thorsten Ottosen 2003-2004. Use, modification and
Chris@16: //  distribution is subject to the Boost Software License, Version
Chris@16: //  1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@16: //  http://www.boost.org/LICENSE_1_0.txt)
Chris@16: //
Chris@16: // For more information, see http://www.boost.org/libs/range/
Chris@16: //
Chris@16: 
Chris@16: #ifndef BOOST_RANGE_SIZE_HPP
Chris@16: #define BOOST_RANGE_SIZE_HPP
Chris@16: 
Chris@101: #if defined(_MSC_VER)
Chris@16: # pragma once
Chris@16: #endif
Chris@16: 
Chris@16: #include <boost/range/config.hpp>
Chris@16: #include <boost/range/begin.hpp>
Chris@16: #include <boost/range/end.hpp>
Chris@16: #include <boost/range/size_type.hpp>
Chris@101: #include <boost/range/detail/has_member_size.hpp>
Chris@16: #include <boost/assert.hpp>
Chris@101: #include <boost/cstdint.hpp>
Chris@101: #include <boost/utility.hpp>
Chris@16: 
Chris@16: namespace boost
Chris@16: {
Chris@16:     namespace range_detail
Chris@16:     {
Chris@101: 
Chris@16:         template<class SinglePassRange>
Chris@101:         inline typename ::boost::enable_if<
Chris@101:             has_member_size<SinglePassRange>,
Chris@101:             typename range_size<const SinglePassRange>::type
Chris@101:         >::type
Chris@16:         range_calculate_size(const SinglePassRange& rng)
Chris@16:         {
Chris@101:             return rng.size();
Chris@101:         }
Chris@101: 
Chris@101:         template<class SinglePassRange>
Chris@101:         inline typename disable_if<
Chris@101:             has_member_size<SinglePassRange>,
Chris@101:             typename range_size<const SinglePassRange>::type
Chris@101:         >::type
Chris@101:         range_calculate_size(const SinglePassRange& rng)
Chris@101:         {
Chris@101:             return std::distance(boost::begin(rng), boost::end(rng));
Chris@16:         }
Chris@16:     }
Chris@16: 
Chris@16:     template<class SinglePassRange>
Chris@101:     inline typename range_size<const SinglePassRange>::type
Chris@16:     size(const SinglePassRange& rng)
Chris@16:     {
Chris@16: #if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) && \
Chris@16:     !BOOST_WORKAROUND(__GNUC__, < 3) \
Chris@16:     /**/
Chris@16:         using namespace range_detail;
Chris@16: #endif
Chris@16:         return range_calculate_size(rng);
Chris@16:     }
Chris@16: 
Chris@16: } // namespace 'boost'
Chris@16: 
Chris@16: #endif