user-defined operators

[James Hague]

I wrote:
>	1 + {2,4,6} returns {5,6,7}
>	{2,4,6} + 1 returns {5,6,7}

Obviously these should return {3,5,7} :)

>One point of debate: whether to allow
>nested tuples.  I would say no, as this
>starts leading to confusing agreement rules.

Let me clarify my stance by emphatically disallowing nested tuples.  As in
K, Erlang already provides the tools to deal with recursive structures.