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      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 int main()
     21 {
     22     int ia[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
     23     int ia1[] = {2, 7, 1, 4, 3, 6, 5, 10, 9, 8};
     24     int ia2[] = {1, 8, 3, 4, 6, 9, 5, 7, 2, 10};
     25     const unsigned sa = sizeof(ia)/sizeof(ia[0]);
     26     std::minstd_rand g;
     27     std::shuffle(ia, ia+sa, g);
     28     assert(std::equal(ia, ia+sa, ia1));
     29     std::shuffle(ia, ia+sa, g);
     30     assert(std::equal(ia, ia+sa, ia2));
     31 }
     32