Robert Will robertw at
Wed Apr 7 11:32:47 EDT 2004

On Mon, 5 Apr 2004 ajb at wrote:
> In principle, it shouldn't be too hard to identify families of
> sequences/associations/collections all of which support a certain
> efficient default, and to associate the family with the collection.

Been there, done that.

Dessy distinguishes for Sequences: queues and democratic
and for Ordered Structures: Search Trees, Range Trees, Tries

To implement this using default members we need a language extension which
is roughly specified on that page.  Formal proposal follows.


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