libstdc++-v3/testsuite/26_numerics/random/mersenne_twister_engine/operators/serialize.cc

   1 // { dg-do run { target c++11 } }
   2 // { dg-require-cstdint "" }
   3 //
   4 // 2008-11-24  Edward M. Smith-Rowland <3dw4rd@verizon.net>
   5 //
   6 // Copyright (C) 2008-2022 Free Software Foundation, Inc.
   7 //
   8 // This file is part of the GNU ISO C++ Library.  This library is free
   9 // software; you can redistribute it and/or modify it under the
  10 // terms of the GNU General Public License as published by the
  11 // Free Software Foundation; either version 3, or (at your option)
  12 // any later version.
  13 //
  14 // This library is distributed in the hope that it will be useful,
  15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 // GNU General Public License for more details.
  18 //
  19 // You should have received a copy of the GNU General Public License along
  20 // with this library; see the file COPYING3.  If not see
  21 // <http://www.gnu.org/licenses/>.
  22
  23 // 26.4.3.2 Class template mersenne_twister_engine [rand.eng.mers]
  24 // 26.4.2.2 Concept RandomNumberEngine [rand.concept.eng]
  25
  26 #include <sstream>
  27 #include <random>
  28 #include <testsuite_hooks.h>
  29
  30 void
  31 test01()
  32 {
  33   std::stringstream str;
  34   std::mersenne_twister_engine<
  35     unsigned long, 32, 624, 397, 31,
  36     0x9908b0dful, 11,
  37     0xfffffffful, 7,
  38     0x9d2c5680ul, 15,
  39     0xefc60000ul, 18, 1812433253ul> u, v;
  40
  41   u(); // advance
  42   str << u;
  43
  44   VERIFY( !(u == v) );
  45
  46   str >> v;
  47   VERIFY( u == v );
  48   for (unsigned i = 0; i < 1000; ++i)
  49     VERIFY( u() == v() );
  50
  51   str.clear();
  52   str << v;
  53
  54   u();
  55   u();
  56   u();
  57
  58   str >> u;
  59   VERIFY( u == v );
  60   for (unsigned i = 0; i < 1000; ++i)
  61     VERIFY( u() == v() );
  62 }
  63
  64 int main()
  65 {
  66   test01();
  67   return 0;
  68 }