I would like the for/... comprehension macros to have #:while and #:until clauses similar to the #:when and #:unless clauses. I often find I want to short-circuit the sequence at some point, but there is no elegant way to do it. I could probably write sequence-while and sequence-until, but I don't want to move this condition into the sequence any more than I want to write sequence-filter instead of #:when or #:unless.
Has this been brought up before? I can't recall. Does anyone else run into the same issue? Carl Eastlund
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