ignore-errors in XEmacs

ignore-errors in XEmacs

[Thien-Thi Nguyen]

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I'd like to replace

  (condition-case () BODY (error nil))

in mic-paren.el w/ ‘ignore-errors’, which is nowadays supplied by GNU
Emacs subr.el (i.e., "built in").  Is it likewise built in w/ XEmacs?

-- 
Thien-Thi Nguyen
   GPG key: 4C807502
   (if you're human and you know it)
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Re: ignore-errors in XEmacs

[Stefan Monnier]

> I'd like to replace
>   (condition-case () BODY (error nil))
> in mic-paren.el w/ ‘ignore-errors’, which is nowadays supplied by GNU
> Emacs subr.el (i.e., "built in").  Is it likewise built in w/ XEmacs?

I don't know about that, but I do recommend you carefully consider each
use: throwing all errors to /dev/null is sometimes the right thing to
do, but if errors really shouldn't happen (and yet, you want to protect
yourself from bugs in other packages), then it's better to use something
like with-demote-errors, so errors don't get in the way but they aren't
hidden under the carpet.


        Stefan

Re: ignore-errors in XEmacs

[Thien-Thi Nguyen]

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() Stefan Monnier <monnier@iro.umontreal.ca>
() Tue, 24 Sep 2013 17:31:26 -0400

   > Is [ignore-errors] likewise built in w/ XEmacs?

   I don't know about that, but I do recommend you carefully consider
   each use: throwing all errors to /dev/null is sometimes the right
   thing to do, but if errors really shouldn't happen (and yet, you
   want to protect yourself from bugs in other packages), then it's
   better to use something like with-demote-errors, so errors don't
   get in the way but they aren't hidden under the carpet.

I agree in principle.

If it were my code i would have avoided ‘ignore-errors’ from the
beginning, but here i am trying to honor the intent of mic (as far as
i can deduce), so the indicated path is necessarily more circumspect.
(This is not an argument against your recommendation, btw.)

Anyway, in case anyone is interested, i think XEmacs 21.5, available
many years now but still "beta", has ‘ignore-errors’, but it requires
cl.el:

 http://www.xemacs.org/Documentation/21.5/html/cl_14.html

(thus, NOT "built in").  If anyone knows otherwise, please correct me.

-- 
Thien-Thi Nguyen
   GPG key: 4C807502
   (if you're human and you know it)
      read my lisp: (responsep (questions 'technical)
                               (not (via 'mailing-list)))
                     => nil

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