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strided adaptor rewritten to correct defects and optimise performance.

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This commit is contained in:
Neil Groves
2014-02-26 21:17:29 +00:00
parent 654ae838ee
commit ceffd1cf79
8 changed files with 653 additions and 144 deletions
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25
include/boost/range/size.hpp
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@ -19,24 +19,39 @@
#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 BOOST_DEDUCED_TYPENAME range_size<const SinglePassRange>::type
inline typename enable_if<
has_member_size<SinglePassRange>,
typename range_size<const SinglePassRange>::type
>::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);
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 BOOST_DEDUCED_TYPENAME range_size<const SinglePassRange>::type
inline typename range_size<const SinglePassRange>::type
size(const SinglePassRange& rng)
{
#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) && \