Re: Creating recursive customization types / widgets

[Richard Stallman]

    (define-widget 'child 'default
      "Base widget for recursive datastructures.

    You need to set :type to the widget type for the datastructure you
    want to define, and set :match to a function that matches the
    datastructure.  If the datastructure is not recursive, you don't have
    to set :match."

It looks like a good feature, but I can't really understand
that doc string, so it needs to be somewhat clearer.