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On Friday, February 14, 2003 12:19 PM, Richard Kelsey [SMTP:kelsey@xxxxxxx] wrote: > The nice thing about STREAM-DELAY is that it makes it clear that what > is going on is a delay. You use it if you want to delay evaluating a > stream-valued expression and don't use it if there is nothing to delay. > Because streams are fully-lazy there is no need for a corresponding > STREAM-FORCE. The various stream primitives (STREAM-NULL?, STREAM-CAR, > and so forth) do the forcing. Ah. Now everything is clear. I understand why you prefer the name STREAM-DELAY to MAKE-STREAM, and I agree. I'll get to work on a new version of the library that changes the underlying primitives and fixes the problem of excessive use of stream-define. Phil