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62 lines
2.0 KiB
Plaintext
62 lines
2.0 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:stable_partition stable_partition]
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[heading Prototype]
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``
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template<class ForwardRange, class UnaryPredicate>
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typename range_iterator<ForwardRange>::type
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stable_partition(ForwardRange& rng, UnaryPredicate pred);
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template<class ForwardRange, class UnaryPredicate>
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typename range_iterator<const ForwardRange>::type
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stable_partition(const ForwardRange& rng, UnaryPredicate pred);
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template<
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range_return_value re,
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class ForwardRange,
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class UnaryPredicate
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>
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typename range_return<ForwardRange, re>::type
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stable_partition(ForwardRange& rng, UnaryPredicate pred);
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template<
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range_return_value re,
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class ForwardRange,
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class UnaryPredicate
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>
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typename range_return<const ForwardRange, re>::type
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stable_partition(const ForwardRange& rng, UnaryPredicate pred);
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``
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[heading Description]
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`stable_partition` reorders the elements in the range `rng` base on the function object `pred`. Once this function has completed all of the elements that satisfy `pred` appear before all of the elements that fail to satisfy it. `stable_partition` differs from `partition` because it preserves relative order. It is stable.
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For the versions that return an iterator, the return value is the iterator to the first element that fails to satisfy `pred`.
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For versions that return a `range_return`, the `found` iterator is the iterator to the first element that fails to satisfy `pred`.
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[heading Definition]
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Defined in the header file `boost/range/algorithm/stable_partition.hpp`
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[heading Requirements]
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* `ForwardRange` is a model of the __forward_range__ Concept.
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* `ForwardRange` is mutable.
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* `UnaryPredicate` is a model of the `PredicateConcept`.
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[heading Complexity]
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Best case: `O(N)` where `N` is `distance(rng)`.
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Worst case: `N * log(N)` swaps, where `N` is `distance(rng)`.
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[endsect]
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