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, 2 insertions, 2 deletions

diff --git a/demos/declarative/snake/content/snake.js b/demos/declarative/snake/content/snake.js
index a65aebc..12176c7 100644
--- a/demos/declarative/snake/content/snake.js
+++ b/demos/declarative/snake/content/snake.js
@@ -54,7 +54,7 @@ function startNewGame()
         } else {
             if(linkComponent.isReady == false){
                 if(linkComponent.isError == true)
-                    print(linkComponent.errorString());
+                    print(linkComponent.errorsString());
                 else
                     print("Still loading linkComponent");
                 continue;//TODO: Better error handling?
@@ -295,7 +295,7 @@ function createCookie(value) {
 
     if(cookieComponent.isReady == false){
         if(cookieComponent.isError == true)
-            print(cookieComponent.errorString());
+            print(cookieComponent.errorsString());
         else
             print("Still loading cookieComponent");
         return;//TODO: Better error handling?