old-autovect-branch/libstdc++-v3/testsuite/18_support/numeric_limits/infinity.cc

   1 // { dg-options "-mieee" { target alpha*-*-* } }
   2 // { dg-options "-mieee" { target sh*-*-* } }
   3
   4 // 1999-08-23 bkoz
   5
   6 // Copyright (C) 1999, 2001, 2002, 2003, 2004 Free Software Foundation
   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 2, 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 COPYING.  If not, write to the Free
  21 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  22 // USA.
  23
  24 // 18.2.1.1 template class numeric_limits
  25
  26 #include <limits>
  27 #include <limits.h>
  28 #include <float.h>
  29 #include <cwchar>
  30 #include <testsuite_hooks.h>
  31
  32 template<typename T>
  33 void
  34 test_infinity()
  35 {
  36   bool test;
  37
  38   if (std::numeric_limits<T>::has_infinity)
  39     {
  40       T inf = std::numeric_limits<T>::infinity();
  41       test = (inf + inf == inf);
  42     }
  43   else
  44     test = true;
  45
  46   VERIFY (test);
  47 }
  48
  49 int main()
  50 {
  51   test_infinity<float>();
  52   test_infinity<double>();
  53   test_infinity<long double>();
  54
  55   return 0;
  56 }