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| ** |
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| |
| #ifndef QSSGOption_H |
| #define QSSGOption_H |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt API. It exists purely as an |
| // implementation detail. This header file may change from version to |
| // version without notice, or even be removed. |
| // |
| // We mean it. |
| // |
| |
| #include <QtQuick3DUtils/private/qtquick3dutilsglobal_p.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| struct QSSGEmpty |
| { |
| }; |
| |
| template<typename TDataType> |
| class QSSGOption |
| { |
| TDataType mData; |
| bool mHasValue; |
| |
| public: |
| QSSGOption(const TDataType &data) : mData(data), mHasValue(true) {} |
| QSSGOption(const QSSGEmpty &) : mHasValue(false) {} |
| QSSGOption() : mHasValue(false) {} |
| QSSGOption(const QSSGOption &other) : mData(other.mData), mHasValue(other.mHasValue) {} |
| QSSGOption &operator=(const QSSGOption &other) |
| { |
| mData = other.mData; |
| mHasValue = other.mHasValue; |
| return *this; |
| } |
| |
| bool isEmpty() const { return !mHasValue; } |
| void setEmpty() { mHasValue = false; } |
| bool hasValue() const { return mHasValue; } |
| |
| const TDataType &getValue() const |
| { |
| Q_ASSERT(mHasValue); |
| return mData; |
| } |
| TDataType &getValue() |
| { |
| Q_ASSERT(mHasValue); |
| return mData; |
| } |
| TDataType &unsafeGetValue() { return mData; } |
| |
| operator const TDataType &() const { return getValue(); } |
| operator TDataType &() { return getValue(); } |
| |
| const TDataType *operator->() const { return &getValue(); } |
| TDataType *operator->() { return &getValue(); } |
| |
| const TDataType &operator*() const { return getValue(); } |
| TDataType &operator*() { return getValue(); } |
| |
| friend bool operator==(const QSSGOption &a, const QSSGOption &b) { |
| return a.mHasValue == b.mHasValue && a.mData == b.mData; |
| } |
| friend bool operator!=(const QSSGOption &a, const QSSGOption &b) { |
| return !(a == b); |
| } |
| }; |
| |
| QT_END_NAMESPACE |
| |
| #endif // QSSGOption_H |