////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2025 Laurent Gomila (laurent@sfml-dev.org)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
//    you must not claim that you wrote the original software.
//    If you use this software in a product, an acknowledgment
//    in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
//    and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////

#pragma once

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// Headers
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#include <SFML/System/Export.hpp>

#include <iosfwd>


namespace sf
{
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/// \brief Standard stream used by SFML to output warnings and errors
///
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[[nodiscard]] SFML_SYSTEM_API std::ostream& err();

} // namespace sf


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/// \fn sf::err
/// \ingroup system
///
/// By default, `sf::err()` outputs to the same location as `std::cerr`,
/// (-> the stderr descriptor) which is the console if there's
/// one available.
///
/// It is a standard `std::ostream` instance, so it supports all the
/// insertion operations defined by the STL
/// (`operator<<`, manipulators, etc.).
///
/// `sf::err()` can be redirected to write to another output, independently
/// of `std::cerr`, by using the `rdbuf()` function provided by the
/// `std::ostream` class.
///
/// Example:
/// \code
/// // Redirect to a file
/// std::ofstream file("sfml-log.txt");
/// std::streambuf* previous = sf::err().rdbuf(file.rdbuf());
///
/// // Redirect to nothing
/// sf::err().rdbuf(nullptr);
///
/// // Restore the original output
/// sf::err().rdbuf(previous);
/// \endcode
///
/// \return Reference to `std::ostream` representing the SFML error stream
///
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