libstdc++-v3/testsuite/30_threads/shared_future/members/45133.cc

   1 // { dg-do run }
   2 // { dg-options "-pthread"  }
   3 // { dg-require-effective-target c++11 }
   4 // { dg-require-effective-target pthread }
   5 // { dg-require-gthreads "" }
   6
   7 // Copyright (C) 2010-2020 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 // 30.6.7 Class template shared_future [futures.shared_future]
  25
  26 #include <future>
  27 #include <testsuite_hooks.h>
  28
  29 // This test verifies behaviour which is encouraged by a non-normative note,
  30 // but not required.
  31
  32 void
  33 test01()
  34 {
  35   std::shared_future<int> f;
  36   try
  37   {
  38     f.get();
  39     VERIFY( false );
  40   }
  41   catch (std::future_error& e)
  42   {
  43     VERIFY( e.code() == std::future_errc::no_state );
  44   }
  45 }
  46
  47 void
  48 test02()
  49 {
  50   std::shared_future<int&> f;
  51   try
  52   {
  53     f.get();
  54     VERIFY( false );
  55   }
  56   catch (std::future_error& e)
  57   {
  58     VERIFY( e.code() == std::future_errc::no_state );
  59   }
  60 }
  61
  62 void
  63 test03()
  64 {
  65   std::shared_future<void> f;
  66   try
  67   {
  68     f.get();
  69     VERIFY( false );
  70   }
  71   catch (std::future_error& e)
  72   {
  73     VERIFY( e.code() == std::future_errc::no_state );
  74   }
  75 }
  76
  77 int main()
  78 {
  79   test01();
  80   test02();
  81   test03();
  82
  83   return 0;
  84 }
  85