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52 lines
1.4 KiB
52 lines
1.4 KiB
// Boost.Range library |
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// |
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// Copyright Thorsten Ottosen 2003-2004. Use, modification and |
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// distribution is subject to the Boost Software License, Version |
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// 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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// |
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// For more information, see http://www.boost.org/libs/range/ |
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// |
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#ifndef BOOST_RANGE_SIZE_HPP |
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#define BOOST_RANGE_SIZE_HPP |
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#if defined(_MSC_VER) && (_MSC_VER >= 1200) |
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# pragma once |
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#endif |
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#include <boost/range/config.hpp> |
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#include <boost/range/begin.hpp> |
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#include <boost/range/end.hpp> |
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#include <boost/range/difference_type.hpp> |
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#include <boost/assert.hpp> |
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namespace boost |
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{ |
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namespace range_detail |
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{ |
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template<class SinglePassRange> |
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inline BOOST_DEDUCED_TYPENAME range_difference<SinglePassRange>::type |
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range_calculate_size(const SinglePassRange& rng) |
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{ |
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BOOST_ASSERT( (boost::end(rng) - boost::begin(rng)) >= 0 && |
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"reachability invariant broken!" ); |
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return boost::end(rng) - boost::begin(rng); |
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} |
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} |
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template<class SinglePassRange> |
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inline BOOST_DEDUCED_TYPENAME range_difference<SinglePassRange>::type |
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size(const SinglePassRange& rng) |
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{ |
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#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) && \ |
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!BOOST_WORKAROUND(__GNUC__, < 3) \ |
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/**/ |
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using namespace range_detail; |
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#endif |
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return range_calculate_size(rng); |
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} |
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} // namespace 'boost' |
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#endif
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