mirror of https://github.com/OpenRCT2/OpenRCT2.git
66 lines
1.4 KiB
C++
66 lines
1.4 KiB
C++
#pragma region Copyright (c) 2014-2017 OpenRCT2 Developers
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/*****************************************************************************
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* OpenRCT2, an open source clone of Roller Coaster Tycoon 2.
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*
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* OpenRCT2 is the work of many authors, a full list can be found in contributors.md
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* For more information, visit https://github.com/OpenRCT2/OpenRCT2
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*
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* OpenRCT2 is free software: you can redistribute it and/or modify
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* it under the terms of the GNU 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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* A full copy of the GNU General Public License can be found in licence.txt
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*****************************************************************************/
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#pragma endregion
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#pragma once
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#ifdef __cplusplus
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#include "../common.h"
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template<typename T>
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struct Nullable
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{
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public:
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Nullable()
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{
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_value = T();
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_hasValue = false;
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}
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Nullable(std::nullptr_t)
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{
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_value = T();
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_hasValue = false;
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}
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Nullable(const T &value)
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{
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_value = value;
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_hasValue = true;
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}
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bool HasValue() const
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{
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return _hasValue;
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}
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T GetValue() const
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{
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return _value;
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}
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T GetValueOrDefault(T defaultValue) const
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{
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return _hasValue ? _value : defaultValue;
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}
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private:
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T _value;
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bool _hasValue;
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};
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#endif
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