bug#24982: 24.5; way to let Elisp reader ignore unreadable #(...) constructs

[Juri Linkov]

>> > 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 "#")