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

   1 // { dg-do run { target c++11 } }
   2 // { dg-require-cstdint "" }
   3 //
   4 // 2008-11-24  Edward M. Smith-Rowland <3dw4rd@verizon.net>
   5 //
   6 // Copyright (C) 2008-2018 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 // 26.4.3.3 Class template subtract_with_carry_engine [rand.eng.sub]
  24 // 26.4.2.2 Concept RandomNumberEngine [rand.concept.eng]
  25
  26 #include <sstream>
  27 #include <random>
  28 #include <testsuite_hooks.h>
  29
  30 void
  31 test01()
  32 {
  33   std::stringstream str;
  34   std::subtract_with_carry_engine<unsigned long, 24, 10, 24> u;
  35   std::subtract_with_carry_engine<unsigned long, 24, 10, 24> v;
  36
  37   u(); // advance
  38   str << u;
  39
  40   VERIFY( !(u == v) );
  41
  42   str >> v;
  43   VERIFY( u == v );
  44   for (unsigned i = 0; i < 1000; ++i)
  45     VERIFY( u() == v() );
  46
  47   str.clear();
  48   str << v;
  49
  50   u();
  51   u();
  52   u();
  53
  54   str >> u;
  55   VERIFY( u == v );
  56   for (unsigned i = 0; i < 1000; ++i)
  57     VERIFY( u() == v() );
  58 }
  59
  60 int main()
  61 {
  62   test01();
  63   return 0;
  64 }