libstdc++-v3/testsuite/26_numerics/random/random_device/cons/default.cc

   1 // { dg-do run { target c++11 } }
   2 // { dg-require-effective-target random_device }
   3 // { dg-require-cstdint "" }
   4 //
   5 // 2008-11-24  Edward M. Smith-Rowland <3dw4rd@verizon.net>
   6 //
   7 // Copyright (C) 2008-2020 Free Software Foundation, Inc.
   8 //
   9 // This file is part of the GNU ISO C++ Library.  This library is free
  10 // software; you can redistribute it and/or modify it under the
  11 // terms of the GNU General Public License as published by the
  12 // Free Software Foundation; either version 3, or (at your option)
  13 // any later version.
  14 //
  15 // This library is distributed in the hope that it will be useful,
  16 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 // GNU General Public License for more details.
  19 //
  20 // You should have received a copy of the GNU General Public License along
  21 // with this library; see the file COPYING3.  If not see
  22 // <http://www.gnu.org/licenses/>.
  23
  24 // C++11 26.5.6 class random_device [rand.device]
  25
  26 #include <random>
  27 #include <testsuite_hooks.h>
  28
  29 void
  30 test01()
  31 {
  32   std::random_device x;
  33
  34   using result_type = std::random_device::result_type;
  35   VERIFY( x.min() == std::numeric_limits<result_type>::min() );
  36   VERIFY( x.max() == std::numeric_limits<result_type>::max() );
  37
  38   result_type n [[gnu::unused]] = x();
  39 }
  40
  41 int main()
  42 {
  43   test01();
  44   return 0;
  45 }