diff options
Diffstat (limited to 'src/qml/qml/qqmljavascriptexpression_p.h')
-rw-r--r-- | src/qml/qml/qqmljavascriptexpression_p.h | 21 |
1 files changed, 7 insertions, 14 deletions
diff --git a/src/qml/qml/qqmljavascriptexpression_p.h b/src/qml/qml/qqmljavascriptexpression_p.h index c8f54527a0..f9f304a524 100644 --- a/src/qml/qml/qqmljavascriptexpression_p.h +++ b/src/qml/qml/qqmljavascriptexpression_p.h @@ -92,19 +92,12 @@ private: class Q_QML_PRIVATE_EXPORT QQmlJavaScriptExpression { public: - // Although this looks crazy, we implement our own "vtable" here, rather than relying on - // C++ virtuals, to save memory. By doing it ourselves, we can overload the storage - // location that is use for the vtable to also store the rarely used delayed error. - // If we use C++ virtuals, we can't do this and it consts us an extra sizeof(void *) in - // memory for every expression. - struct VTable { - QString (*expressionIdentifier)(QQmlJavaScriptExpression *); - void (*expressionChanged)(QQmlJavaScriptExpression *); - }; - - QQmlJavaScriptExpression(VTable *vtable); + QQmlJavaScriptExpression(); virtual ~QQmlJavaScriptExpression(); + virtual QString expressionIdentifier() = 0; + virtual void expressionChanged() = 0; + QV4::ReturnedValue evaluate(QQmlContextData *, const QV4::Value &function, bool *isUndefined); QV4::ReturnedValue evaluate(QQmlContextData *, const QV4::Value &function, QV4::CallData *callData, bool *isUndefined); @@ -176,7 +169,7 @@ private: QStringList *errorString; }; - QPointerValuePair<VTable, QQmlDelayedError> m_vtable; + QQmlDelayedError *m_error; // We store some flag bits in the following flag pointers. // activeGuards:flag1 - notifyOnValueChanged @@ -234,12 +227,12 @@ void QQmlJavaScriptExpression::setScopeObject(QObject *v) bool QQmlJavaScriptExpression::hasError() const { - return m_vtable.hasValue() && m_vtable.constValue()->isValid(); + return m_error && m_error->isValid(); } bool QQmlJavaScriptExpression::hasDelayedError() const { - return m_vtable.hasValue(); + return m_error; } QQmlJavaScriptExpressionGuard::QQmlJavaScriptExpressionGuard(QQmlJavaScriptExpression *e) |