libstdc++-v3/testsuite/ext/random/simd_fast_mersenne_twister_engine/operators/serialize.cc

   1 // { dg-do run { target c++11 } }
   2 // { dg-require-cstdint "" }
   3 // { dg-require-little-endian "" }
   4 //
   5 // 2008-11-24  Edward M. Smith-Rowland <3dw4rd@verizon.net>
   6 // 2012-08-28  Ulrich Drepper  <drepper@gmail.com>, adapted for SFMT
   7 //
   8 // Copyright (C) 2008-2024 Free Software Foundation, Inc.
   9 //
  10 // This file is part of the GNU ISO C++ Library.  This library is free
  11 // software; you can redistribute it and/or modify it under the
  12 // terms of the GNU General Public License as published by the
  13 // Free Software Foundation; either version 3, or (at your option)
  14 // any later version.
  15 //
  16 // This library is distributed in the hope that it will be useful,
  17 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 // GNU General Public License for more details.
  20 //
  21 // You should have received a copy of the GNU General Public License along
  22 // with this library; see the file COPYING3.  If not see
  23 // <http://www.gnu.org/licenses/>.
  24
  25 // 26.4.3.2 Class template mersenne_twister_engine [rand.eng.mers]
  26 // 26.4.2.2 Concept RandomNumberEngine [rand.concept.eng]
  27
  28 #include <sstream>
  29 #include <ext/random>
  30 #include <testsuite_hooks.h>
  31
  32 void
  33 test01()
  34 {
  35   std::stringstream str;
  36   __gnu_cxx::sfmt19937 u, v;
  37
  38   u(); // advance
  39   str << u;
  40
  41   VERIFY( !(u == v) );
  42
  43   str >> v;
  44   VERIFY( u == v );
  45   for (unsigned i = 0; i < 1000; ++i)
  46     VERIFY( u() == v() );
  47
  48   str.clear();
  49   str << v;
  50
  51   u();
  52   u();
  53   u();
  54
  55   str >> u;
  56   VERIFY( u == v );
  57   for (unsigned i = 0; i < 1000; ++i)
  58     VERIFY( u() == v() );
  59 }
  60
  61 int main()
  62 {
  63   test01();
  64   return 0;
  65 }