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questions about IF
Date: Fri, 10 Jun 88 14:03:06 EST
I just noticed something strange about the Symbolic's IF:
(I am still using 7.1 so this may not apply in 7.2?)
For compatibility reasons, it will probably remain forever.
So the else-clause to an IF is an implicit PROGN.
This is NOT in the Common-Lisp language specification?
It is a Symbolics extension to Common Lisp. It was a documentation
error that this was not noted in the chapter on Common Lisp
compatibility. I think this was fixed in the 7.2 documentation, but I
don't have it handy at the moment to check.
Someone said recently in this group that IF is now a more primitive than
the COND. Can I get more details on this? How could they have done this? Does
my code run faster now if I use Ifs than if I use Conds?
I think you'll get equivalent (although not necessarily identical)
results whether you use nested IFs or a COND.