68 lines
2.4 KiB
C
68 lines
2.4 KiB
C
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/*
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* libnbt++ - A library for the Minecraft Named Binary Tag format.
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* Copyright (C) 2013, 2015 ljfa-ag
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*
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* This file is part of libnbt++.
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*
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* libnbt++ is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* libnbt++ is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with libnbt++. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef VALUE_INITIALIZER_H_INCLUDED
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#define VALUE_INITIALIZER_H_INCLUDED
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#include "value.h"
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#include "nbt++_export.h"
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namespace nbt
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{
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/**
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* @brief Helper class for implicitly constructing value objects
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*
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* This type is a subclass of @ref value. However the only difference to value
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* is that this class has additional constructors which allow implicit
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* conversion of various types to value objects. These constructors are not
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* part of the value class itself because implicit conversions like this
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* (especially from @c tag&& to @c value) can cause problems and ambiguities
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* in some cases.
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*
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* value_initializer is especially useful as function parameter type, it will
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* allow convenient conversion of various values to tags on function call.
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*
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* As value_initializer objects are in no way different than value objects,
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* they can just be converted to value after construction.
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*/
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class NBT___EXPORT value_initializer : public value
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{
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public:
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value_initializer(std::unique_ptr<tag>&& t) noexcept: value(std::move(t)) {}
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value_initializer(std::nullptr_t) noexcept : value(nullptr) {}
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value_initializer(value&& val) noexcept : value(std::move(val)) {}
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value_initializer(tag&& t) : value(std::move(t)) {}
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value_initializer(int8_t val);
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value_initializer(int16_t val);
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value_initializer(int32_t val);
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value_initializer(int64_t val);
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value_initializer(float val);
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value_initializer(double val);
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value_initializer(const std::string& str);
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value_initializer(std::string&& str);
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value_initializer(const char* str);
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};
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}
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#endif // VALUE_INITIALIZER_H_INCLUDED
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