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

   1 // { dg-options "-mieee" { target alpha*-*-* } }
   2 // { dg-options "-mieee" { target sh*-*-* } }
   3
   4 // Copyright (C) 2005 Free Software Foundation
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 2, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING.  If not, write to the Free
  19 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  20 // USA.
  21
  22 // 18.2.1.1 template class numeric_limits
  23
  24 #include <limits>
  25 #include <testsuite_hooks.h>
  26
  27 template<typename T>
  28   void
  29   test_traps(T r = T(0))
  30   {
  31     typedef T value_type;
  32     volatile value_type i(5);
  33     volatile value_type j(0);
  34
  35     if (!std::numeric_limits<value_type>::traps)
  36       r = i / j;
  37   }
  38
  39 // libstdc++/22203
  40 int main()
  41 {
  42   test_traps<int>();
  43   test_traps<unsigned int>();
  44   test_traps<long>();
  45   test_traps<unsigned long>();
  46   test_traps<long long>();
  47   test_traps<unsigned long long>();
  48
  49   /*
  50     For floating points, trapping is a different, more complicated
  51     story.  If is_iecxxx is true, then division by zero would not trap
  52     (infinity).  If is_iecxxx is false, we don't know (VAX may trap for
  53     0/0 -- I have to check).  For most cases (i.e. IEE-754), trapping
  54     for floating points have to do with whether there is a support for
  55     signaling NaN.
  56     - Gaby.
  57   */
  58   //  test_traps<float>();
  59   //  test_traps<double>();
  60   //  test_traps<long double>();
  61
  62   return 0;
  63 }