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<class RandomAccessIterator, class UniformRandomNumberGenerator> 13 // void shuffle(RandomAccessIterator first, RandomAccessIterator last, 14 // UniformRandomNumberGenerator& g); 15 16 #include <algorithm> 17 #include <random> 18 #include <cassert> 19 20 #include "test_macros.h" 21 22 int main() 23 { 24 int ia[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; 25 int ia1[] = {2, 7, 1, 4, 3, 6, 5, 10, 9, 8}; 26 int ia2[] = {1, 8, 3, 4, 6, 9, 5, 7, 2, 10}; 27 const unsigned sa = sizeof(ia)/sizeof(ia[0]); 28 std::minstd_rand g; 29 std::shuffle(ia, ia+sa, g); 30 LIBCPP_ASSERT(std::equal(ia, ia+sa, ia1)); 31 assert(std::is_permutation(ia, ia+sa, ia1)); 32 std::shuffle(ia, ia+sa, std::move(g)); 33 LIBCPP_ASSERT(std::equal(ia, ia+sa, ia2)); 34 assert(std::is_permutation(ia, ia+sa, ia2)); 35 } 36
