libstdc++-v3/testsuite/21_strings/char_traits/requirements/char/57704.cc

   1 // Copyright (C) 2013-2017 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 #include <string>
  19 #include <testsuite_hooks.h>
  20
  21 void test01()
  22 {
  23   char a = '\x7f';
  24   char b = '\x80';
  25
  26   VERIFY( (std::char_traits<char>::lt(a, b)
  27            == (static_cast<unsigned char>(a)
  28                < static_cast<unsigned char>(b))) );
  29 }
  30
  31 int main()
  32 {
  33   test01();
  34   return 0;
  35 }