Re: [cdr-discuss] EQUALS, COMPARE and HASH-CODE

On Wed, Mar 2, 2011 at 9:44 AM, Marco Antoniotti marcoxa@cs.nyu.edu wrote:

New version with most egregious mistakes corrected.

Thanks for the fixes on the points I raised. I'm feeling like I miss the use case for EQUALS. The document states:

"... while writing algorithms and libraries it would be useful to have "hooks" in the type and class system allowing for the definition of extensible equality and comparison tests."

If an algorithm does comparison operations, then the interface should accept a :test argument. Where does EQUALS come into play? I'm interested in an example.

Thanks, - Willem