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