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 21 struct gen 22 { 23 int operator()(int n) 24 { 25 return n-1; 26 } 27 }; 28 29 int 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
