[GitHub] [royale-compiler] joshtynjala commented on issue #207: Typed Functions with signatures

[GitBox <gi...@apache.org>]

joshtynjala commented on issue #207:
URL: https://github.com/apache/royale-compiler/issues/207#issuecomment-1015823549


   This is definitely something I have always wanted to see in AS3.
   
   If this were to be implemented, one thing that should be allowed is something like this:
   
   ```as3
   var fun:Function.<(ev:Event):void> = function(ev:Object):void {};
   ```
   
   To be clear, Event is a subclass of Object, so that function should be allowed for the same reason why you can assign an `Event` instance to a variable of type `Object`.
   
   ```as3
   var obj:Object = new Event();
   ```
   
   With return types, there's a similar situation, but instead of superclasses, subclasses would be allowed.
   
   ```
   var fun:Function.<():Object> = function():Event {}
   ```


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