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, Callable<auto, Iter::difference_type> Rand> 13// requires ShuffleIterator<Iter> 14// && Convertible<Rand::result_type, Iter::difference_type> 15// void 16// random_shuffle(Iter first, Iter last, Rand&& rand); 17 18#include <algorithm> 19#include <cassert> 20 21struct gen 22{ 23 int operator()(int n) 24 { 25 return n-1; 26 } 27}; 28 29int main() 30{ 31 int ia[] = {1, 2, 3, 4}; 32 int ia1[] = {4, 1, 2, 3}; 33 const unsigned sa = sizeof(ia)/sizeof(ia[0]); 34 gen r; 35 std::random_shuffle(ia, ia+sa, r); 36 assert(std::equal(ia, ia+sa, ia1)); 37} 38