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.

2 files changed, 4 insertions, 4 deletions

diff --git a/examples/declarative/progressbar/content/ProgressBar.qml b/examples/declarative/progressbar/content/ProgressBar.qml
index bfc801c..65c80b2 100644
--- a/examples/declarative/progressbar/content/ProgressBar.qml
+++ b/examples/declarative/progressbar/content/ProgressBar.qml
@@ -21,7 +21,7 @@ Item {
         id: highlight; radius: 1
         anchors.left: parent.left; anchors.top: parent.top; anchors.bottom: parent.bottom
         anchors.leftMargin: 3; anchors.topMargin: 3; anchors.bottomMargin: 3
-        width: EaseFollow { source: highlight.widthDest; velocity: 1200 }
+        EaseFollow on width { source: highlight.widthDest; velocity: 1200 }
         gradient: Gradient {
             GradientStop { id: g1; position: 0.0 }
             GradientStop { id: g2; position: 1.0 }
diff --git a/examples/declarative/progressbar/progressbars.qml b/examples/declarative/progressbar/progressbars.qml
index 6530c3d..a66d544 100644
--- a/examples/declarative/progressbar/progressbars.qml
+++ b/examples/declarative/progressbar/progressbars.qml
@@ -14,9 +14,9 @@ Rectangle {
                 ProgressBar {
                     property int r: Math.floor(Math.random() * 5000 + 1000)
                     width: main.width - 20
-                    value: NumberAnimation { duration: r; from: 0; to: 100; repeat: true }
-                    color: ColorAnimation { duration: r; from: "lightsteelblue"; to: "thistle"; repeat: true }
-                    secondColor: ColorAnimation { duration: r; from: "steelblue"; to: "#CD96CD"; repeat: true }
+                    NumberAnimation on value { duration: r; from: 0; to: 100; repeat: true }
+                    ColorAnimation on color { duration: r; from: "lightsteelblue"; to: "thistle"; repeat: true }
+                    ColorAnimation on secondColor { duration: r; from: "steelblue"; to: "#CD96CD"; repeat: true }
                 }
             }
         }