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Library/boost/libs/range/doc/reference/algorithm/random_shuffle.qbk
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19 дек 2024, 19:11
19 дек 2024, 19:11
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[/ Copyright 2010 Neil Groves Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) /] [section:random_shuffle random_shuffle] [heading Prototype] `` template<class RandomAccessRange> RandomAccessRange& random_shuffle(RandomAccessRange& rng); template<class RandomAccessRange> const RandomAccessRange& random_shuffle(const RandomAccessRange& rng); template<class RandomAccessRange, class Generator> RandomAccessRange& random_shuffle(RandomAccessRange& rng, Generator& gen); template<class RandomAccessRange, class Generator> const RandomAccessRange& random_shuffle(const RandomAccessRange& rng, Generator& gen); `` [heading Description] `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. [heading Definition] Defined in the header file `boost/range/algorithm/random_shuffle.hpp` [heading Requirements] [*For the version without a Generator:] * `RandomAccessRange` is a model of the __random_access_range__ Concept. [*For the version with a Generator:] * `RandomAccessRange` is a model of the __random_access_range__ Concept. * `Generator` is a model of the `RandomNumberGeneratorConcept`. * `RandomAccessRange`'s distance type is convertible to `Generator`'s argument type. [heading Precondition:] * `distance(rng)` is less than `gen`'s maximum value. [heading Complexity] Linear. If `!empty(rng)`, exactly `distance(rng) - 1` swaps are performed. [endsect]