On 22 Apr 2010, at 21:15, Konrad Hinsen wrote:
I have several former deftypes that are a perfect fit for the new defrecord, except that they need a specific comparison function. This is usually for excluding some fields from equality testing, or for requiring identity rather than equality for some fields.
What I'd actually like to have for defrecord is an "equality" protocol that I can implement myself or use a default implementation. That protocol would have a function "equals" guaranteed to be called only if the object compared to is of the same type. Object.equals would take care of type testing and then call the protocol function. That would remove the check-type-before-comparing-fields overhead that every equals implementation for deftype and defrecord currently requires.
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