// Copyright (C) 2018-2023 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-options "-Wnonnull" }
// { dg-do compile { target c++17 } }

#include <string_view>

void
test01()
{
  std::string_view s((const char*)nullptr); // { dg-warning "\\\[-Wnonnull" }
  std::string_view t((char*)nullptr);	    // { dg-warning "\\\[-Wnonnull" }
  std::string_view u(nullptr);		    // { dg-warning "\\\[-Wnonnull" "" { target c++20_down } }
// { dg-error "deleted" "P2166R1" { target c++23 } 0 }
}