Nested scope property

[nndda]

Allow nested properties of a scope:

scope.object.property = value
scope.object.method( args )

I think it can be done by utilizing Object.get_indexed() and Object.set_indexed().

• Property manipulation:

  scope_obj.set_indexed(^"object:property", value)

• Function call:

  (scope_obj.get_indexed(^"object:method") as Callable).call(args)

Parsing

On parse time, the property path need to be identified...

scope.object.property = value
      ^             ^
      object.property

...and then turned into a NodePath:

^"object:property"

Error handling

To see if a scope has the property path, check if get_indexed() returns null:

get_indexed(^"object:...") == null

Compatibility

It works fine with a single-depth property, so it should be backward compatible.

Performance

I don't know the speed difference between get_indexed() and just get(). But it should be negligible.
If there's a considerable performance difference, we'll use get() for non-nested property instead.

Limitation

It works even for dictionaries, but not array.