1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// <algorithm>
11
12// template<RandomAccessIterator Iter>
13//   requires ShuffleIterator<Iter>
14//   void
15//   random_shuffle(Iter first, Iter last);
16
17#include <algorithm>
18#include <cassert>
19
20int main()
21{
22    int ia[] = {1, 2, 3, 4};
23    int ia1[] = {1, 4, 3, 2};
24    int ia2[] = {4, 1, 2, 3};
25    const unsigned sa = sizeof(ia)/sizeof(ia[0]);
26    std::random_shuffle(ia, ia+sa);
27    assert(std::equal(ia, ia+sa, ia1));
28    std::random_shuffle(ia, ia+sa);
29    assert(std::equal(ia, ia+sa, ia2));
30}
31