Introduce QQmlAnyBinding as an abstraction over bindings

QQmlAnyBinding is meant to abstract over the differences between
classical, QQmlAbstractBinding derived bindings and the newer
QPropertyBindingPrivate based ones. It can be used to store, receive,
remove, create and set bindings of both types.

In addition, this patches adds the functionality to create a
QQmlPropertyBinding from a code string, which was so far only
possible with QQmlBinding; and adds a few methods to QBiPointer to ease
the implementation of QQmlAnyBinding.

Task-number: QTBUG-91000
Change-Id: I7076d6fb426f315f32c1b054c5c3ba56312bed29
Reviewed-by: Andrei Golubev <andrei.golubev@qt.io>
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

1 files changed, 6 insertions, 1 deletions

diff --git a/src/qml/qml/qqmlpropertybinding_p.h b/src/qml/qml/qqmlpropertybinding_p.h
index 4dcd5c1879..7c7fac866a 100644
--- a/src/qml/qml/qqmlpropertybinding_p.h
+++ b/src/qml/qml/qqmlpropertybinding_p.h
@@ -101,6 +101,11 @@ public:
                                           QObject *obj, const QQmlRefPointer<QQmlContextData> &ctxt,
                                           QV4::ExecutionContext *scope, QObject *target,
                                           QQmlPropertyIndex targetIndex);
+    static QUntypedPropertyBinding createFromCodeString(const QQmlPropertyData *property,
+                                                        const QString &str, QObject *obj,
+                                                        const QQmlRefPointer<QQmlContextData> &ctxt,
+                                                        const QString &url, quint16 lineNumber,
+                                                        QObject *target, QQmlPropertyIndex targetIndex);
 
     static QUntypedPropertyBinding createFromBoundFunction(const QQmlPropertyData *pd, QV4::BoundFunction *function,
                                           QObject *obj, const QQmlRefPointer<QQmlContextData> &ctxt,
@@ -157,7 +162,7 @@ inline constexpr BindingFunctionVTable bindingFunctionVTable<QQmlPropertyBinding
 class QQmlTranslationPropertyBinding
 {
 public:
-    static QUntypedPropertyBinding create(const QQmlPropertyData *pd,
+    static QUntypedPropertyBinding Q_QML_PRIVATE_EXPORT create(const QQmlPropertyData *pd,
                                           const QQmlRefPointer<QV4::ExecutableCompilationUnit> &compilationUnit,
                                           const QV4::CompiledData::Binding *binding);
 };