Re: Hashing on more than one attribute?

[Finn Wilcox <finnw@...>]

On 08/11/2012 10:42, joao lobato wrote:
> I wonder if it would make sense to have __eq influence table hashing.

This works in Lisp only because the :TEST function must be one of the 
four predefined ones (EQ, EQL, EQUAL, EQUALP.)  If you defined your own 
__eq metamethod, it would be impossible (in the general case) for the 
implementation to create a hash function consistent with it.