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

   1 // { dg-add-options ieee }
   2
   3 // 1999-08-23 bkoz
   4
   5 // Copyright (C) 1999-2018 Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 3, or (at your option)
  11 // any later version.
  12
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING3.  If not see
  20 // <http://www.gnu.org/licenses/>.
  21
  22 // 18.2.1.1 template class numeric_limits
  23
  24 #include <limits>
  25 #include <limits.h>
  26 #include <float.h>
  27 #include <cwchar>
  28 #include <testsuite_hooks.h>
  29
  30 #ifdef __CHAR_UNSIGNED__
  31 #define char_is_signed false
  32 #else
  33 #define char_is_signed true
  34 #endif
  35
  36 void test_sign()
  37 {
  38   VERIFY( std::numeric_limits<char>::is_signed == char_is_signed );
  39   VERIFY( std::numeric_limits<signed char>::is_signed == true );
  40   VERIFY( std::numeric_limits<unsigned char>::is_signed == false );
  41   VERIFY( std::numeric_limits<short>::is_signed == true );
  42   VERIFY( std::numeric_limits<unsigned short>::is_signed == false );
  43   VERIFY( std::numeric_limits<int>::is_signed == true );
  44   VERIFY( std::numeric_limits<unsigned>::is_signed == false );
  45   VERIFY( std::numeric_limits<long>::is_signed == true );
  46   VERIFY( std::numeric_limits<unsigned long>::is_signed == false );
  47   VERIFY( std::numeric_limits<float>::is_signed == true );
  48   VERIFY( std::numeric_limits<double>::is_signed == true );
  49   VERIFY( std::numeric_limits<long double>::is_signed == true );
  50 }
  51
  52 int main()
  53 {
  54   test_sign();
  55
  56   return 0;
  57 }