| [section:unique unique] |
| |
| [heading Prototype] |
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| `` |
| template<class ForwardRange> |
| typename range_return<ForwardRange, return_begin_found>::type |
| unique(ForwardRange& rng); |
| |
| template<class ForwardRange> |
| typename range_return<const ForwardRange, return_begin_found>::type |
| unique(const ForwardRange& rng); |
| |
| template<class ForwardRange, class BinaryPredicate> |
| typename range_return<ForwardRange, return_begin_found>::type |
| unique(ForwardRange& rng, BinaryPredicate pred); |
| |
| template<class ForwardRange, class BinaryPredicate> |
| typename range_return<const ForwardRange, return_begin_found>::type |
| unique(const ForwardRange& rng, BinaryPredicate pred); |
| |
| template<range_return_value re, class ForwardRange> |
| typename range_return<ForwardRange, re>::type |
| unique(ForwardRange& rng); |
| |
| template<range_return_value re, class ForwardRange> |
| typename range_return<const ForwardRange, re>::type |
| unique(const ForwardRange& rng); |
| |
| template<range_return_value re, class ForwardRange, class BinaryPredicate> |
| typename range_return<ForwardRange, re>::type |
| unique(ForwardRange& rng, BinaryPredicate pred); |
| |
| template<range_return_value re, class ForwardRange, class BinaryPredicate> |
| typename range_return<const ForwardRange, re>::type |
| unique(const ForwardRange& rng, BinaryPredicate pred); |
| `` |
| |
| [heading Description] |
| |
| `unique` removes all but the first element of each sequence of duplicate encountered in `rng`. |
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| Elements in the range `[new_last, end(rng))` are dereferenceable but undefined. |
| |
| Equality is determined by the predicate if one is supplied, or by `operator==()` for `ForwardRange`'s value type. |
| |
| [heading Definition] |
| |
| Defined in the header file `boost/range/algorithm/unique.hpp` |
| |
| [heading Requirements] |
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| [*For the non-predicate versions of unique:] |
| |
| * `ForwardRange` is a model of the __forward_range__ Concept. |
| * `ForwardRange` is mutable. |
| * `ForwardRange`'s value type is a model of the `EqualityComparableConcept`. |
| |
| [*For the predicate versions of unique:] |
| |
| * `ForwardRange` is a model of the __forward_range__ Concept. |
| * `ForwardRange` is mutable. |
| * `BinaryPredicate` is a model of the `BinaryPredicateConcept`. |
| * `ForwardRange`'s value type is convertible to `BinaryPredicate`'s first argument type and to `BinaryPredicate`'s second argument type. |
| |
| [heading Complexity] |
| |
| Linear. `O(N)` where `N` is `distance(rng)`. Exactly `distance(rng)` comparisons are performed. |
| |
| [endsect] |
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| |
