I thought llast() and length() were going away too?
For llast(), I decided to keep it around: it is nicely symmetric with linitial(), and it makes any code that actually needs the last value in a list significantly more readable. Since it's a macro there's no runtime cost.
I had thought about keeping length() around, but on second thought I don't see why we ought to. I'll replace it with list_length() and post an updated patch.
-Neil
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