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56 lines
1.7 KiB
Plaintext
56 lines
1.7 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:random_shuffle random_shuffle]
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[heading Prototype]
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``
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template<class RandomAccessRange>
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RandomAccessRange& random_shuffle(RandomAccessRange& rng);
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template<class RandomAccessRange>
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const RandomAccessRange& random_shuffle(const RandomAccessRange& rng);
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template<class RandomAccessRange, class Generator>
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RandomAccessRange& random_shuffle(RandomAccessRange& rng, Generator& gen);
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template<class RandomAccessRange, class Generator>
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const RandomAccessRange& random_shuffle(const RandomAccessRange& rng, Generator& gen);
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``
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[heading Description]
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`random_shuffle` randomly rearranges the elements in `rng`. The versions of `random_shuffle` that do not specify a `Generator` use an internal random number generator. The versions of `random_shuffle` that do specify a `Generator` use this instead. Returns the shuffles range.
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[heading Definition]
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Defined in the header file `boost/range/algorithm/random_shuffle.hpp`
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[heading Requirements]
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[*For the version without a Generator:]
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* `RandomAccessRange` is a model of the __random_access_range__ Concept.
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[*For the version with a Generator:]
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* `RandomAccessRange` is a model of the __random_access_range__ Concept.
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* `Generator` is a model of the `RandomNumberGeneratorConcept`.
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* `RandomAccessRange`'s distance type is convertible to `Generator`'s argument type.
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[heading Precondition:]
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* `distance(rng)` is less than `gen`'s maximum value.
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[heading Complexity]
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Linear. If `!empty(rng)`, exactly `distance(rng) - 1` swaps are performed.
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[endsect]
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