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78 lines
2.5 KiB
Plaintext
78 lines
2.5 KiB
Plaintext
[/
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Copyright 2010 Neil Groves
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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/]
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[section:unique unique]
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[heading Prototype]
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``
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template<class ForwardRange>
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typename range_return<ForwardRange, return_begin_found>::type
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unique(ForwardRange& rng);
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template<class ForwardRange>
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typename range_return<const ForwardRange, return_begin_found>::type
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unique(const ForwardRange& rng);
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template<class ForwardRange, class BinaryPredicate>
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typename range_return<ForwardRange, return_begin_found>::type
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unique(ForwardRange& rng, BinaryPredicate pred);
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template<class ForwardRange, class BinaryPredicate>
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typename range_return<const ForwardRange, return_begin_found>::type
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unique(const ForwardRange& rng, BinaryPredicate pred);
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template<range_return_value re, class ForwardRange>
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typename range_return<ForwardRange, re>::type
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unique(ForwardRange& rng);
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template<range_return_value re, class ForwardRange>
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typename range_return<const ForwardRange, re>::type
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unique(const ForwardRange& rng);
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template<range_return_value re, class ForwardRange, class BinaryPredicate>
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typename range_return<ForwardRange, re>::type
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unique(ForwardRange& rng, BinaryPredicate pred);
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template<range_return_value re, class ForwardRange, class BinaryPredicate>
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typename range_return<const ForwardRange, re>::type
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unique(const ForwardRange& rng, BinaryPredicate pred);
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``
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[heading Description]
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`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.
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Equality is determined by the predicate if one is supplied, or by `operator==()` for `ForwardRange`'s value type.
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[heading Definition]
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Defined in the header file `boost/range/algorithm/unique.hpp`
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[heading Requirements]
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[*For the non-predicate versions of unique:]
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* `ForwardRange` is a model of the __forward_range__ Concept.
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* `ForwardRange` is mutable.
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* `ForwardRange`'s value type is a model of the `EqualityComparableConcept`.
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[*For the predicate versions of unique:]
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* `ForwardRange` is a model of the __forward_range__ Concept.
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* `ForwardRange` is mutable.
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* `BinaryPredicate` is a model of the `BinaryPredicateConcept`.
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* `ForwardRange`'s value type is convertible to `BinaryPredicate`'s first argument type and to `BinaryPredicate`'s second argument type.
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[heading Complexity]
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Linear. `O(N)` where `N` is `distance(rng)`. Exactly `distance(rng)` comparisons are performed.
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[endsect]
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