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bug#3418: Issue with compile.el and compilation-parse-errors-filename-fu
From: |
Eli Zaretskii |
Subject: |
bug#3418: Issue with compile.el and compilation-parse-errors-filename-function |
Date: |
Fri, 11 Aug 2017 09:34:59 +0300 |
> From: npostavs@users.sourceforge.net
> Cc: Eli Zaretskii <eliz@gnu.org>, 3418@debbugs.gnu.org, Andrew Hyatt
> <ahyatt@gmail.com>
> Date: Thu, 10 Aug 2017 20:50:29 -0400
>
> Gary Oberbrunner <garyo@genarts.com> writes:
>
> > If a user (such as myself) has an implementation of this function in his
> > .emacs today, like so:
> >
> > (defun process-error-filename (filename)
> > ;;; do stuff with filename
> > filename)
> > (setq compilation-parse-errors-filename-function 'process-error-filename)
> >
> > and we add a new argument that gets passed to that function, it'll throw an
> > error. *Users* will have to add
> > &optional spec-dir
> > to their implementations of it to avoid the error.
>
> We could do something like
>
> (condition-case err
> (funcall compilation-parse-errors-filename-function filename spec-dir)
> (wrong-number-of-arguments
> ;; Try again with single arg for backwards compatibility.
> (funcall compilation-parse-errors-filename-function filename)))
Or use func-arity?