libstdc++-v3/testsuite/26_numerics/random/linear_congruential_engine/operators/51795.cc

   1 // { dg-options "-std=gnu++11" }
   2 // { dg-require-cstdint "" }
   3 //
   4 // Copyright (C) 2012-2013 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11 //
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16 //
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 // 26.5.3.1 class template linear_congruential_engine [rand.eng.lcong]
  22
  23 #include <random>
  24 #include <testsuite_hooks.h>
  25
  26 void test01()
  27 {
  28   bool test __attribute__((unused)) = true;
  29
  30   typedef std::linear_congruential_engine<std::uint64_t, 1103515245ULL,
  31                                           12345, 2147483648ULL> engine;
  32   engine eng(1103527590ULL);
  33
  34   for (unsigned it = 0; it < 1000; ++it)
  35     {
  36       std::uint64_t num = eng();
  37       VERIFY( (num >= eng.min() && num <= eng.max()) );
  38     }
  39 }
  40
  41 int main()
  42 {
  43   test01();
  44   return 0;
  45 }