98 lines
2.8 KiB
C++
98 lines
2.8 KiB
C++
|
// Boost.Range library
|
||
|
|
//
|
||
|
|
// Copyright Thorsten Ottosen, Neil Groves 2006 - 2008. 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_ADAPTOR_UNIQUED_IMPL_HPP
|
||
|
|
#define BOOST_RANGE_ADAPTOR_UNIQUED_IMPL_HPP
|
||
|
|
|
||
|
|
#include <boost/range/adaptor/adjacent_filtered.hpp>
|
||
|
|
#include <boost/range/concepts.hpp>
|
||
|
|
|
||
|
|
namespace boost
|
||
|
|
{
|
||
|
|
|
||
|
|
namespace range_detail
|
||
|
|
{
|
||
|
|
struct unique_forwarder { };
|
||
|
|
|
||
|
|
struct unique_not_equal_to
|
||
|
|
{
|
||
|
|
typedef bool result_type;
|
||
|
|
|
||
|
|
template< class T >
|
||
|
|
bool operator()( const T& l, const T& r ) const
|
||
|
|
{
|
||
|
|
return !(l == r);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template<class ForwardRng>
|
||
|
|
class uniqued_range : public adjacent_filtered_range<unique_not_equal_to, ForwardRng, true>
|
||
|
|
{
|
||
|
|
typedef adjacent_filtered_range<unique_not_equal_to, ForwardRng, true> base;
|
||
|
|
public:
|
||
|
|
explicit uniqued_range(ForwardRng& rng)
|
||
|
|
: base(unique_not_equal_to(), rng)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template< class ForwardRng >
|
||
|
|
inline uniqued_range<ForwardRng>
|
||
|
|
operator|( ForwardRng& r,
|
||
|
|
unique_forwarder )
|
||
|
|
{
|
||
|
|
BOOST_RANGE_CONCEPT_ASSERT((ForwardRangeConcept<ForwardRng>));
|
||
|
|
return uniqued_range<ForwardRng>(r);
|
||
|
|
}
|
||
|
|
|
||
|
|
template< class ForwardRng >
|
||
|
|
inline uniqued_range<const ForwardRng>
|
||
|
|
operator|( const ForwardRng& r,
|
||
|
|
unique_forwarder )
|
||
|
|
{
|
||
|
|
BOOST_RANGE_CONCEPT_ASSERT((ForwardRangeConcept<const ForwardRng>));
|
||
|
|
return uniqued_range<const ForwardRng>(r);
|
||
|
|
}
|
||
|
|
|
||
|
|
} // 'range_detail'
|
||
|
|
|
||
|
|
using range_detail::uniqued_range;
|
||
|
|
|
||
|
|
namespace adaptors
|
||
|
|
{
|
||
|
|
namespace
|
||
|
|
{
|
||
|
|
const range_detail::unique_forwarder uniqued =
|
||
|
|
range_detail::unique_forwarder();
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class ForwardRange>
|
||
|
|
inline uniqued_range<ForwardRange>
|
||
|
|
unique(ForwardRange& rng)
|
||
|
|
{
|
||
|
|
BOOST_RANGE_CONCEPT_ASSERT((ForwardRangeConcept<ForwardRange>));
|
||
|
|
return uniqued_range<ForwardRange>(rng);
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class ForwardRange>
|
||
|
|
inline uniqued_range<const ForwardRange>
|
||
|
|
unique(const ForwardRange& rng)
|
||
|
|
{
|
||
|
|
BOOST_RANGE_CONCEPT_ASSERT((
|
||
|
|
ForwardRangeConcept<const ForwardRange>));
|
||
|
|
|
||
|
|
return uniqued_range<const ForwardRange>(rng);
|
||
|
|
}
|
||
|
|
} // 'adaptors'
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|