// 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> | |
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 ) | |
{ | |
return uniqued_range<ForwardRng>(r); | |
} | |
template< class ForwardRng > | |
inline uniqued_range<const ForwardRng> | |
operator|( const ForwardRng& r, | |
unique_forwarder ) | |
{ | |
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) | |
{ | |
return uniqued_range<ForwardRange>(rng); | |
} | |
template<class ForwardRange> | |
inline uniqued_range<const ForwardRange> | |
unique(const ForwardRange& rng) | |
{ | |
return uniqued_range<const ForwardRange>(rng); | |
} | |
} // 'adaptors' | |
} | |
#endif |