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) We could do something like
>
> 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.
(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)))