forked from OSchip/llvm-project
38 lines
958 B
C++
38 lines
958 B
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <algorithm>
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// template<RandomAccessIterator Iter, Callable<auto, Iter::difference_type> Rand>
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// requires ShuffleIterator<Iter>
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// && Convertible<Rand::result_type, Iter::difference_type>
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// void
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// random_shuffle(Iter first, Iter last, Rand&& rand);
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#include <algorithm>
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#include <cassert>
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struct gen
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{
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int operator()(int n)
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{
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return n-1;
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}
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};
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int main()
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{
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int ia[] = {1, 2, 3, 4};
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int ia1[] = {4, 1, 2, 3};
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const unsigned sa = sizeof(ia)/sizeof(ia[0]);
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gen r;
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std::random_shuffle(ia, ia+sa, r);
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assert(std::equal(ia, ia+sa, ia1));
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}
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