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