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78 lines
3.0 KiB
Plaintext
78 lines
3.0 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:inplace_merge inplace_merge]
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[heading Prototype]
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``
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template<class BidirectionalRange>
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BidirectionalRange&
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inplace_merge( BidirectionalRange& rng,
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typename range_iterator<BidirectionalRange>::type middle );
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template<class BidirectionalRange>
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const BidirectionalRange&
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inplace_merge( const BidirectionalRange& rng,
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typename range_iterator<const BidirectionalRange>::type middle );
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template<class BidirectionalRange, class BinaryPredicate>
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BidirectionalRange&
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inplace_merge( BidirectionalRange& rng,
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typename range_iterator<BidirectionalRange>::type middle,
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BinaryPredicate pred );
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template<class BidirectionalRange, class BinaryPredicate>
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const BidirectionalRange&
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inplace_merge( const BidirectionalRange& rng,
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typename range_iterator<const BidirectionalRange>::type middle,
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BinaryPredicate pred );
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``
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[heading Description]
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`inplace_merge` combines two consecutive sorted ranges `[begin(rng), middle)` and `[middle, end(rng))` into a single sorted range `[begin(rng), end(rng))`. That is, it starts with a range `[begin(rng), end(rng))` that consists of two pieces each of which is in ascending order, and rearranges it so that the entire range is in ascending order. `inplace_merge` is stable, meaning both that the relative order of elements within each input range is preserved.
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[heading Definition]
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Defined in the header file `boost/range/algorithm/inplace_merge.hpp`
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[heading Requirements]
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[*For the non-predicate version:]
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* `BidirectionalRange` is a model of the __bidirectional_range__ Concept.
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* `BidirectionalRange` is mutable.
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* `range_value<BidirectionalRange>::type` is a model of `LessThanComparableConcept`
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* The ordering on objects of `range_type<BidirectionalRange>::type` is a [*/strict weak ordering/], as defined in the `LessThanComparableConcept` requirements.
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[*For the predicate version:]
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* `BidirectionalRange` is a model of the __bidirectional_range__ Concept.
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* `BidirectionalRange` is mutable.
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* `BinaryPredicate` is a model of the `StrictWeakOrderingConcept`.
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* `BidirectionalRange`'s value type is convertible to both `BinaryPredicate`'s argument types.
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[heading Precondition:]
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[heading For the non-predicate version:]
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* `middle` is in the range `rng`.
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* `[begin(rng), middle)` is in ascending order. That is for each pair of adjacent elements `[x,y]`, `y < x` is `false`.
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* `[middle, end(rng))` is in ascending order. That is for each pair of adjacent elements `[x,y]`, `y < x` is `false`.
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[heading For the predicate version:]
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* `middle` is in the range `rng`.
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* `[begin(rng), middle)` is in ascending order. That is for each pair of adjacent elements `[x,y]`, `pred(y,x) == false`.
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* `[middle, end(rng))` is in ascending order. That is for each pair of adjacent elements `[x,y]`, `pred(y,x) == false`.
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[heading Complexity]
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Worst case: `O(N log(N))`
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[endsect]
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