libstdc++-v3/testsuite/18_support/numeric_limits/traps.cc

   1 // { dg-add-options ieee }
   2
   3 // Copyright (C) 2005-2013 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // 18.2.1.1 template class numeric_limits
  21
  22 #include <limits>
  23 #include <testsuite_hooks.h>
  24
  25 template<typename T>
  26   void
  27   test_traps(T r = T(0))
  28   {
  29     typedef T value_type;
  30     volatile value_type i(5);
  31     volatile value_type j(0);
  32
  33     if (!std::numeric_limits<value_type>::traps)
  34       r = i / j;
  35   }
  36
  37 // libstdc++/22203
  38 int main()
  39 {
  40   test_traps<int>();
  41   test_traps<unsigned int>();
  42   test_traps<long>();
  43   test_traps<unsigned long>();
  44   test_traps<long long>();
  45   test_traps<unsigned long long>();
  46
  47   /*
  48     For floating points, trapping is a different, more complicated
  49     story.  If is_iecxxx is true, then division by zero would not trap
  50     (infinity).  If is_iecxxx is false, we don't know (VAX may trap for
  51     0/0 -- I have to check).  For most cases (i.e. IEE-754), trapping
  52     for floating points have to do with whether there is a support for
  53     signaling NaN.
  54     - Gaby.
  55   */
  56   //  test_traps<float>();
  57   //  test_traps<double>();
  58   //  test_traps<long double>();
  59
  60   return 0;
  61 }