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

   1 // { dg-options "-std=c++0x" }
   2 // { dg-require-cstdint "" }
   3 //
   4 // 2008-11-24  Edward M. Smith-Rowland <3dw4rd@verizon.net>
   5 // 2012-08-28  Ulrich Drepper  <drepper@gmail.com>, adapted for SFMT
   6 //
   7 // Copyright (C) 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
   8 //
   9 // This file is part of the GNU ISO C++ Library.  This library is free
  10 // software; you can redistribute it and/or modify it under the
  11 // terms of the GNU General Public License as published by the
  12 // Free Software Foundation; either version 3, or (at your option)
  13 // any later version.
  14 //
  15 // This library is distributed in the hope that it will be useful,
  16 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 // GNU General Public License for more details.
  19 //
  20 // You should have received a copy of the GNU General Public License along
  21 // with this library; see the file COPYING3.  If not see
  22 // <http://www.gnu.org/licenses/>.
  23
  24 // 26.4.3.2 Class template mersenne_twister_engine [rand.eng.mers]
  25 // 26.4.2.2 Concept RandomNumberEngine [rand.concept.eng]
  26
  27 #include <sstream>
  28 #include <ext/random>
  29 #include <testsuite_hooks.h>
  30
  31 void
  32 test01()
  33 {
  34   bool test __attribute__((unused)) = true;
  35
  36   std::stringstream str;
  37   __gnu_cxx::sfmt19937 u, v;
  38
  39   u(); // advance
  40   str << u;
  41
  42   VERIFY( !(u == v) );
  43
  44   str >> v;
  45   VERIFY( u == v );
  46   for (unsigned i = 0; i < 1000; ++i)
  47     VERIFY( u() == v() );
  48
  49   str.clear();
  50   str << v;
  51
  52   u();
  53   u();
  54   u();
  55
  56   str >> u;
  57   VERIFY( u == v );
  58   for (unsigned i = 0; i < 1000; ++i)
  59     VERIFY( u() == v() );
  60 }
  61
  62 int main()
  63 {
  64   test01();
  65   return 0;
  66 }