diff options
| author | Simon Hausmann <simon.hausmann@qt.io> | 2016-06-24 11:01:29 +0200 |
|---|---|---|
| committer | Simon Hausmann <simon.hausmann@qt.io> | 2016-06-27 07:39:47 +0000 |
| commit | 8d139e5e42dddac7f8cd443d7040cab0e86acd19 (patch) | |
| tree | 254952dd358ec1231ee90a50ec3f4ddeb48d520e /tests/auto/qml/qqmlecmascript/data | |
| parent | 3dfd47362fea05bc354f814b5b743856f5ce7462 (diff) | |
Minor optimization
I've seen people write
property SomeItem myProperty: null
This is an unnecessary initialization that ends up creating a binding
expression. Generally there's handling missing for null and undefined, but in
this very case we should just optimize away the initializer expression,
because QObject style properties are initialized to null by default, as opposed
to undefined.
Change-Id: I7af4cd45461304753c93cef3926f6e92d3b6c95d
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Diffstat (limited to 'tests/auto/qml/qqmlecmascript/data')
3 files changed, 17 insertions, 0 deletions
diff --git a/tests/auto/qml/qqmlecmascript/data/NullObjectInitializerBase.qml b/tests/auto/qml/qqmlecmascript/data/NullObjectInitializerBase.qml new file mode 100644 index 0000000000..4006a2a782 --- /dev/null +++ b/tests/auto/qml/qqmlecmascript/data/NullObjectInitializerBase.qml @@ -0,0 +1,5 @@ +import QtQml 2.0 +QtObject { + property Component factory: Component { QtObject {} } + property QtObject testProperty: factory.createObject() +} diff --git a/tests/auto/qml/qqmlecmascript/data/nullObjectInitializer.2.qml b/tests/auto/qml/qqmlecmascript/data/nullObjectInitializer.2.qml new file mode 100644 index 0000000000..d59f8f99f9 --- /dev/null +++ b/tests/auto/qml/qqmlecmascript/data/nullObjectInitializer.2.qml @@ -0,0 +1,8 @@ +import QtQml 2.0 +NullObjectInitializerBase { + testProperty: null + property bool success: false + Component.onCompleted: { + success = testProperty === null; + } +} diff --git a/tests/auto/qml/qqmlecmascript/data/nullObjectInitializer.qml b/tests/auto/qml/qqmlecmascript/data/nullObjectInitializer.qml new file mode 100644 index 0000000000..32bc62c9f2 --- /dev/null +++ b/tests/auto/qml/qqmlecmascript/data/nullObjectInitializer.qml @@ -0,0 +1,4 @@ +import QtQml 2.0 +QtObject { + property QtObject testProperty: null +} |