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bug#24982: 24.5; way to let Elisp reader ignore unreadable #(...) constr
From: |
Lars Ingebrigtsen |
Subject: |
bug#24982: 24.5; way to let Elisp reader ignore unreadable #(...) constructs |
Date: |
Sat, 22 Aug 2020 21:17:40 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
Stefan Kangas <stefan@marxist.se> writes:
> Drew Adams <drew.adams@oracle.com> writes:
>
>> Enhancement request:
>>
>> Provide a Boolean variable or a wrapper macro that has the effect of not
>> raising an error but just skipping over any unreadable #(...) construct.
>>
>> (I really wish this were available for older Emacs versions. Those are
>> the ones that barf on #(...) constructs that are supported in later
>> versions.
>
> What's the use-case here? Why can't you use `ignore-errors'?
The problem is when the thing inside the construct is unreadable, not
when there's errors (in a syntactically valid form). For instance:
(ignore-errors #0)
In Common Lisp, this is the #| ... |# operator, and it's handy
occasionally. It's really like a nesting comment thing...
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no