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scl:ignore-errors behavior in 7.2
Date: Thu, 31 Oct 91 17:03:27 PST
From: email@example.com (Fred Lakin)
Does not seem to return multiple values in case of no error;
That's correct. I believe it's documented to return the first value of the
body and a second value of NIL.
and if there is an error, the second value is T, not the
I don't have my documentation here, but I think it's simply documented to
return non-NIL when there's an error, not specifically the error object
(IGNORE-ERRORS predates the condition system).
Is there a way I can achieve this functionality (short of
It still behaves the way you describe in 8.1. However,
future-common-lisp:ignore-errors in 8.1 does what you want. Here's an
implementation that should work prior to this:
(defmacro ansi-ignore-errors (&body body)
(error (values nil e))))
Note the difference between this and the version that someone else posted.
That version contains (values (progn ,@body)), so it only returns one
value when no error occurs. Mine solves both problems described above.