libstdc++-v3/testsuite/20_util/to_chars/95851.cc

// Copyright (C) 2020-2021 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3.  If not see
// <http://www.gnu.org/licenses/>.

// { dg-do run { target c++14 } }

#include <charconv>
#include <testsuite_hooks.h>

void
test01()
{
  char* p = nullptr;
  auto res = std::to_chars(p, p, 0, 2); // PR libstdc++/95851
  VERIFY( res.ptr == p );
  VERIFY( res.ec == std::errc::value_too_large );
}

int
main()
{
  test01();
}