libstdc++-v3/testsuite/26_numerics/random/linear_congruential_engine/operators/serialize.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) 2008-2015 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 // 26.4.3.1 class template linear_congruential_engine [rand.eng.lcong]
  24 // 26.4.2.2 Concept RandomNumberEngine [rand.concept.eng]
  25
  26 #include <random>
  27 #include <sstream>
  28 #include <testsuite_hooks.h>
  29
  30 void
  31 test01()
  32 {
  33   bool test __attribute__((unused)) = true;
  34
  35   std::stringstream str;
  36   std::minstd_rand0 u;
  37   std::minstd_rand0 v;
  38
  39   u(); // advance
  40   str << u;
  41   VERIFY( !(u == v) );
  42
  43   str >> v;
  44   VERIFY( u == v );
  45   for (unsigned i = 0; i < 1000; ++i)
  46     VERIFY( u() == v() );
  47
  48   str.clear();
  49   str << v;
  50
  51   u();
  52   u();
  53   u();
  54
  55   str >> u;
  56   VERIFY( u == v );
  57   for (unsigned i = 0; i < 1000; ++i)
  58     VERIFY( u() == v() );
  59 }
  60
  61 int main()
  62 {
  63   test01();
  64   return 0;
  65 }