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/*
* 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
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