Make "on" syntax mandatory for value sources and interceptors

Where you would have written

   x: NumberAnimation {}
   y: Behavior {}

you now must write

   NumberAnimation on x {}
   Behavior on y {}

This change also makes the parser more strict with respect to multiple
assignments to a single property - they're no longer allowed.  For example
this

   x: 10
   x: 11

is now an error.

1 files changed, 6 insertions, 0 deletions

diff --git a/tests/auto/declarative/qdeclarativelanguage/data/multiSet.5.qml b/tests/auto/declarative/qdeclarativelanguage/data/multiSet.5.qml
new file mode 100644
index 0000000..2980c5b
--- /dev/null
+++ b/tests/auto/declarative/qdeclarativelanguage/data/multiSet.5.qml
@@ -0,0 +1,6 @@
+import Test 1.0
+
+MyContainer {
+    children: MyContainer {}
+    children: MyContainer {}
+}