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61 lines
1.8 KiB
C++
61 lines
1.8 KiB
C++
/* Copyright (C) 2017
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* swift project Community / Contributors
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*
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* This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
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* directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
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* including this file, may be copied, modified, propagated, or distributed except according to the terms
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* contained in the LICENSE file.
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*/
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//! \file
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#ifndef BLACKMISC_NULLABLE_H
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#define BLACKMISC_NULLABLE_H
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#include "blackmisc/blackmiscexport.h"
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#include "blackmisc/propertyindex.h"
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#include "blackmisc/variant.h"
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namespace BlackMisc
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{
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//! Nullable value object
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class BLACKMISC_EXPORT INullable
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{
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public:
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//! Properties by index
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enum ColumnIndex
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{
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IndexIsNull = BlackMisc::CPropertyIndex::GlobalIndexINullable,
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};
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//! Constructor, init to null
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INullable(std::nullptr_t null);
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//! Null?
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bool isNull() const { return m_isNull; }
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//! Null?
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void setNull(bool null) { m_isNull = null; }
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//! Can given index be handled
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static bool canHandleIndex(const BlackMisc::CPropertyIndex &index);
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protected:
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//! Constructor
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INullable() {}
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//! \copydoc BlackMisc::Mixin::Index::propertyByIndex
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CVariant propertyByIndex(const BlackMisc::CPropertyIndex &index) const;
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//! \copydoc BlackMisc::Mixin::Index::setPropertyByIndex
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void setPropertyByIndex(const BlackMisc::CPropertyIndex &index, const CVariant &variant);
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//! Compare for index
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int comparePropertyByIndex(const CPropertyIndex &index, const INullable &compareValue) const;
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bool m_isNull = false; //!< null?
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};
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} // namespace
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#endif // guard
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