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

   1 // { dg-options "-D_GLIBCXX_USE_CXX11_ABI=0" }
   2 // { dg-do run { target c++11 } }
   3 // { dg-require-effective-target random_device }
   4 // { dg-require-cstdint "" }
   5 //
   6 // Copyright (C) 2019-2021 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 // C++11 26.5.6 class random_device [rand.device]
  24
  25 #include <random>
  26 #include <testsuite_hooks.h>
  27
  28 void
  29 test01()
  30 {
  31   std::random_device x;
  32   auto n [[gnu::unused]] = x();
  33 }
  34
  35 int main()
  36 {
  37   test01();
  38 }