libstdc++-v3/testsuite/20_util/to_chars/compare.cc

   1 // Copyright (C) 2020-2023 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 // { dg-do run { target c++20 } }
  19
  20 #include <charconv>
  21 #include <testsuite_hooks.h>
  22
  23 void
  24 test01()
  25 {
  26   char str[2]{};
  27   std::to_chars_result r1{}, r2{};
  28   VERIFY( r1 == r1 );
  29   VERIFY( !(r1 != r1) );
  30   VERIFY( r2 == r1 );
  31   VERIFY( !(r2 != r1) );
  32   r1.ptr = str;
  33   VERIFY( r1 == r1 );
  34   VERIFY( r1 != r2 );
  35   r2.ptr = str + 1;
  36   VERIFY( r1 != r2 );
  37   r2.ptr = r1.ptr;
  38   r2.ec = std::errc::invalid_argument;
  39   VERIFY( r1 != r2 );
  40   r1.ec = std::errc::no_such_file_or_directory;
  41   VERIFY( r1 != r2 );
  42   r1.ec = std::errc::invalid_argument;
  43   VERIFY( r2 == r1 );
  44 }
  45
  46 int
  47 main()
  48 {
  49   test01();
  50 }