53 lines
1.4 KiB
C++
53 lines
1.4 KiB
C++
// 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) && (_MSC_VER >= 1200)
|
|
# pragma once
|
|
#endif
|
|
|
|
#include <boost/range/config.hpp>
|
|
#include <boost/range/begin.hpp>
|
|
#include <boost/range/end.hpp>
|
|
#include <boost/range/difference_type.hpp>
|
|
#include <boost/assert.hpp>
|
|
|
|
namespace boost
|
|
{
|
|
namespace range_detail
|
|
{
|
|
template<class SinglePassRange>
|
|
inline BOOST_DEDUCED_TYPENAME range_difference<SinglePassRange>::type
|
|
range_calculate_size(const SinglePassRange& rng)
|
|
{
|
|
BOOST_ASSERT( (boost::end(rng) - boost::begin(rng)) >= 0 &&
|
|
"reachability invariant broken!" );
|
|
return boost::end(rng) - boost::begin(rng);
|
|
}
|
|
}
|
|
|
|
template<class SinglePassRange>
|
|
inline BOOST_DEDUCED_TYPENAME range_difference<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
|