libcxx/test/std/numerics/rand/rand.adapt/rand.adapt.shuf/io.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // UNSUPPORTED: no-localization
  10
  11 // <random>
  12
  13 // template<class Engine, size_t k>
  14 // class shuffle_order_engine
  15
  16 // template <class charT, class traits,
  17 //           class Engine, size_t k>
  18 // basic_ostream<charT, traits>&
  19 // operator<<(basic_ostream<charT, traits>& os,
  20 //            const shuffle_order_engine<Engine, k>& x);
  21 //
  22 // template <class charT, class traits,
  23 //           class Engine, size_t k>
  24 // basic_istream<charT, traits>&
  25 // operator>>(basic_istream<charT, traits>& is,
  26 //            shuffle_order_engine<Engine, k>& x);
  27
  28 #include <random>
  29 #include <sstream>
  30 #include <cassert>
  31
  32 #include "test_macros.h"
  33
  34 void
  35 test1()
  36 {
  37     typedef std::knuth_b E;
  38     E e1;
  39     e1.discard(100);
  40     std::ostringstream os;
  41     os << e1;
  42     std::istringstream is(os.str());
  43     E e2;
  44     is >> e2;
  45     assert(e1 == e2);
  46 }
  47
  48 int main(int, char**)
  49 {
  50     test1();
  51
  52   return 0;
  53 }