[Grace-core] Mixins in Grace?

[James Noble]

Mixins are cool:

like this

method mixin (x)  {
 return object {
   inherits x 
   //extra bits go here
}}

or this

class Trait.apply (x) {
 inherits x 
  //extra bits go here
}


do we want to support this?    Can we do so (easily?)  with sufficient "staticness" restrictions on x?
(The method/object constructor version currently works in minigrace, the class version doesn't) 

Mixins are one option to support multiple inheritance in practice (e.g. for dialects) without adding (much) complexity / or other features to Grace.

James