Arc Forumnew | comments | leaders | submitlogin
1 point by aw 5223 days ago | link | parent

How about an undo, to undo the last extend you did?

Or a reextend macro, which undoes the last extend and then applies the new extend?

What I found annoying myself about the label was that I had to type it every time, even if it turned out that I didn't need to rewrite it.



1 point by rntz 5223 days ago | link

Undo & reextend could easily be implemented on top of labeled extend - just store the label last used when extending a given function in a table, along with whatever information is needed to undo that extension, and have an unlabeled extension macro that uses a gensym as the label. That way we get labeled & unlabeled extend with undo & replacement.

-----