GNU bug report logs - #24982
24.5; way to let Elisp reader ignore unreadable #(...) constructs

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From: Juri Linkov <juri <at> linkov.net>
To: Drew Adams <drew.adams <at> oracle.com>
Cc: 24982 <at> debbugs.gnu.org
Subject: bug#24982: 24.5; way to let Elisp reader ignore unreadable #(...) constructs
Date: Tue, 03 Apr 2018 23:06:24 +0300

>> >> > 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.
>> >>
>> >> There is such macro called ‘ignore-errors’.
>> >
>> > No.  That ignores all errors.
>> >
>> > Is there an error handler that covers all and only #(...) read errors?
>                                               ^^^^^^^^
>> Then you can use something like
>>   (condition-case err
>>       (read (current-buffer))
>>     (invalid-read-syntax err))
>> that for example for unreadable #<marker ...> returns
>>   (invalid-read-syntax "#")
>
> And (read ")((") gives (invalid-read-syntax ")").
> So it's not specific to unreadable #(...) or #....

You can also use the position in the source buffer
to scan text near the error where reading failed.

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