/*
 * SPDX-FileCopyrightText: 2013, 2015 ljfa-ag <ljfa-ag@web.de>
 *
 * SPDX-License-Identifier: LGPL-3.0-or-later
 */

/*
 * libnbt++ - A library for the Minecraft Named Binary Tag format.
 * Copyright (C) 2013, 2015  ljfa-ag
 *
 * This file is part of libnbt++.
 *
 * libnbt++ is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * libnbt++ 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with libnbt++.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef VALUE_INITIALIZER_H_INCLUDED
#define VALUE_INITIALIZER_H_INCLUDED

#include "value.h"

namespace nbt
{

	/**
	 * @brief Helper class for implicitly constructing value objects
	 *
	 * This type is a subclass of @ref value. However the only difference to
	 * value is that this class has additional constructors which allow implicit
	 * conversion of various types to value objects. These constructors are not
	 * part of the value class itself because implicit conversions like this
	 * (especially from @c tag&& to @c value) can cause problems and ambiguities
	 * in some cases.
	 *
	 * value_initializer is especially useful as function parameter type, it
	 * will allow convenient conversion of various values to tags on function
	 * call.
	 *
	 * As value_initializer objects are in no way different than value objects,
	 * they can just be converted to value after construction.
	 */
	class NBT_EXPORT value_initializer : public value
	{
	  public:
		value_initializer(std::unique_ptr<tag>&& t) noexcept
			: value(std::move(t))
		{
		}
		value_initializer(std::nullptr_t) noexcept : value(nullptr) {}
		value_initializer(value&& val) noexcept : value(std::move(val)) {}
		value_initializer(tag&& t) : value(std::move(t)) {}

		value_initializer(int8_t val);
		value_initializer(int16_t val);
		value_initializer(int32_t val);
		value_initializer(int64_t val);
		value_initializer(float val);
		value_initializer(double val);
		value_initializer(const std::string& str);
		value_initializer(std::string&& str);
		value_initializer(const char* str);
	};

} // namespace nbt

#endif // VALUE_INITIALIZER_H_INCLUDED
