libstdc++-v3/testsuite/tr1/5_numerical_facilities/random/mersenne_twister/cons/gen1.cc

   1 // 2006-06-04  Stephen M. Webb <stephen.webb@bregmasoft.com>
   2 //
   3 // Copyright (C) 2006-2014 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10 //
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // 5.1.4.2 class template mersenne_twister [tr.rand.eng.mers]
  21 // 5.1.1 Table 16 line 3 Gen ctor
  22
  23 // { dg-require-time "" }
  24
  25 #include <ctime>
  26 #include <tr1/random>
  27 #include <testsuite_hooks.h>
  28
  29 // a not untypical initialization function
  30 unsigned long
  31 gen()
  32 {
  33   return std::time(0);
  34 }
  35
  36 void
  37 test01()
  38 {
  39   bool test __attribute__((unused)) = true;
  40   using namespace std::tr1;
  41
  42   mersenne_twister<
  43     unsigned long, 32, 624, 397, 31,
  44     0x9908b0dful, 11, 7,
  45     0x9d2c5680ul, 15,
  46     0xefc60000ul, 18> x(gen);
  47
  48   VERIFY( x.min() == 0 );
  49   VERIFY( x.max() == 4294967295ul );
  50 }
  51
  52 int main()
  53 {
  54   test01();
  55   return 0;
  56 }