libstdc++-v3/testsuite/26_numerics/random/discard_block_engine/operators/equal.cc

   1 // { dg-options "-std=gnu++11" }
   2 // { dg-require-cstdint "" }
   3 //
   4 // 2008-11-24  Edward M. Smith-Rowland <3dw4rd@verizon.net>
   5 //
   6 // Copyright (C) 2008-2016 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 // 26.4.4.1 class template discard_block_engine [rand.adapt.disc]
  24 // 26.4.2.3 concept RandomNumberEngineAdaptor [rand.concept.adapt]
  25
  26 #include <random>
  27 #include <testsuite_hooks.h>
  28
  29 void
  30 test01()
  31 {
  32   bool test __attribute__((unused)) = true;
  33
  34   std::discard_block_engine
  35     <
  36     std::subtract_with_carry_engine<unsigned long, 24, 10, 24>,
  37     389, 24
  38     > u, v;
  39
  40   VERIFY( u == v );
  41
  42   u.discard(100);
  43   v.discard(100);
  44
  45   VERIFY( u == v );
  46 }
  47
  48 int main()
  49 {
  50   test01();
  51   return 0;
  52 }