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add range adaptors adjacent_filtered, uniqued

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bolero-MURAKAMI 2013-01-27 16:56:14 +09:00
parent 9aa2a7c9b2
commit 1cfec16e52
40 changed files with 571 additions and 58 deletions
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sprout/iterator/unique_iterator.hpp Normal file
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#ifndef SPROUT_ITERATOR_UNIQUE_ITERATOR_HPP
#define SPROUT_ITERATOR_UNIQUE_ITERATOR_HPP
#include <sprout/config.hpp>
#include <sprout/iterator/adjacent_filter_iterator.hpp>
#include <sprout/functional/equal_to.hpp>
namespace sprout {
//
// unique_filter
//
template<typename Predicate = sprout::equal_to<> >
class unique_filter {
public:
typedef bool result_type;
private:
Predicate pred_;
public:
SPROUT_CONSTEXPR unique_filter()
: pred_()
{}
explicit SPROUT_CONSTEXPR unique_filter(Predicate pred)
: pred_(pred)
{}
template<typename T, typename U>
SPROUT_CONSTEXPR bool operator()(T const& lhs, U const& rhs) const {
return !pred_(lhs, rhs);
}
};
//
// make_unique_iterator
//
template<typename Predicate, typename Iterator>
inline SPROUT_CONSTEXPR sprout::adjacent_filter_iterator<sprout::unique_filter<Predicate>, Iterator>
make_unique_iterator(Predicate pred, Iterator it, Iterator last = Iterator()) {
return sprout::adjacent_filter_iterator<sprout::unique_filter<Predicate>, Iterator>(
sprout::unique_filter<Predicate>(pred), it, last
);
}
template<typename Iterator>
inline SPROUT_CONSTEXPR sprout::adjacent_filter_iterator<sprout::unique_filter<>, Iterator>
make_unique_iterator(Iterator it, Iterator last = Iterator()) {
return sprout::adjacent_filter_iterator<sprout::unique_filter<>, Iterator>(
sprout::unique_filter<>(), it, last
);
}
} // namespace sprout
#endif // SPROUT_ITERATOR_UNIQUE_ITERATOR_HPP