I have macros working in my Lisp, and used them to implement `add-method!', which I then used to implement `rest' parameters. And it only took 2 weeks of flailing about in confusion about what was supposed to be calling what!
Hmm, how evil would it be to have the new generic function returned by `generic:add-method' compare as equal to the original, even though it has more methods? 🤔
(In particular, you wouldn't quite be able to detect the difference in side-effect-free code, since the difference is one throws less errors than the other.)
Wait, no, you would be able to detect the difference (or the `=' relation is no longer transitive): start with one generic function, then add a method returning `0' in a specific case, then take the original and add a method returning `1' in that specific case. So new0 = original = new1, but they return different values.
hmm hmm hmm.
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