projects / ceph.git / blame
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1 | [/ |
| 2 | Copyright 2010 Neil Groves | |
| 3 | Distributed under the Boost Software License, Version 1.0. | |
| 4 | (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
| 5 | /] | |
| 6 | [section:stable_partition stable_partition] | |
| 7 | ||
| 8 | [heading Prototype] | |
| 9 | ||
| 10 | `` | |
| 11 | template<class ForwardRange, class UnaryPredicate> | |
| 12 | typename range_iterator<ForwardRange>::type | |
| 13 | stable_partition(ForwardRange& rng, UnaryPredicate pred); | |
| 14 | ||
| 15 | template<class ForwardRange, class UnaryPredicate> | |
| 16 | typename range_iterator<const ForwardRange>::type | |
| 17 | stable_partition(const ForwardRange& rng, UnaryPredicate pred); | |
| 18 | ||
| 19 | template< | |
| 20 | range_return_value re, | |
| 21 | class ForwardRange, | |
| 22 | class UnaryPredicate | |
| 23 | > | |
| 24 | typename range_return<ForwardRange, re>::type | |
| 25 | stable_partition(ForwardRange& rng, UnaryPredicate pred); | |
| 26 | ||
| 27 | template< | |
| 28 | range_return_value re, | |
| 29 | class ForwardRange, | |
| 30 | class UnaryPredicate | |
| 31 | > | |
| 32 | typename range_return<const ForwardRange, re>::type | |
| 33 | stable_partition(const ForwardRange& rng, UnaryPredicate pred); | |
| 34 | `` | |
| 35 | ||
| 36 | [heading Description] | |
| 37 | ||
| 38 | `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. | |
| 39 | ||
| 40 | For the versions that return an iterator, the return value is the iterator to the first element that fails to satisfy `pred`. | |
| 41 | ||
| 42 | For versions that return a `range_return`, the `found` iterator is the iterator to the first element that fails to satisfy `pred`. | |
| 43 | ||
| 44 | [heading Definition] | |
| 45 | ||
| 46 | Defined in the header file `boost/range/algorithm/stable_partition.hpp` | |
| 47 | ||
| 48 | [heading Requirements] | |
| 49 | ||
| 50 | * `ForwardRange` is a model of the __forward_range__ Concept. | |
| 51 | * `ForwardRange` is mutable. | |
| 52 | * `UnaryPredicate` is a model of the `PredicateConcept`. | |
| 53 | ||
| 54 | [heading Complexity] | |
| 55 | ||
| 56 | Best case: `O(N)` where `N` is `distance(rng)`. | |
| 57 | Worst case: `N * log(N)` swaps, where `N` is `distance(rng)`. | |
| 58 | ||
| 59 | [endsect] | |
| 60 | ||
| 61 |