MOO-cows Mailing List Archive
Date: Fri, 1 Dec 1995 18:47:35 PST
From: Michael Brundage <email@example.com>
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In-Reply-To: <95Nov29.firstname.lastname@example.org> from "Pavel Curtis" at Nov 29, 95 09:07:28 pm
> -- Added new error-catching expression:
> `EXPR ! CODES => EXPR_H'
> Next, EXPR is evaluated. If it evaluated normally, without raising an
> error, then its value becomes the value of the entire error-catching
> expression. If evaluating EXPR results in an error being raised, then call
> it E. If E is in the list resulting from CODES, then E is considered
> "caught" by this error-catching expression.
[... one example:]
> `1 / 0 ! ANY'
> Returns E_DIV.
It's perhaps worth being really explicit about this point in the ChangeLog,
clearly stating that there's a difference between ``typeof(EXPR)==ERR''
and ``EXPR raises an error''; that is, `E_DIV ! E_DIV => 0' returns E_DIV
because even though EXPR == E_DIV, this does not involve *raising* an error
like 1/0 does. (so `1/0 ! E_DIV => 0' will return 0)
michael, just trying to head off potential confusion before it makes its
way to the mailing list en masse...
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