Subject: bug#61871: 29.0.60; ruby-mode indentation with destructuring assignment

From: Aaron Jensen <[email-masked]>
Date: Tue, 28 Feb 2023 15:00:33 -0500

On Tue, Feb 28, 2023 at 1:37 PM Dmitry Gutov <[email-masked]> wrote:
>
> Hi!
>
> On 28/02/2023 18:17, Aaron Jensen wrote:
> > I found another edge case:
> >
> > foo, bar = baz.(
> >         some_arg
> >       )
> >
> > Should indent to:
> >
> > foo, bar = baz.(
> >    some_arg
> > )
>
> Thanks for that. This one is caused by implicit syntax which it
> non-trivial for SMIE to handle. ruby-ts-mode, predictably, indents it fine.
>
> Please try this patch out:
>
> diff --git a/lisp/progmodes/ruby-mode.el b/lisp/progmodes/ruby-mode.el
> index 559b62fef54..beccb8182a7 100644
> --- a/lisp/progmodes/ruby-mode.el
> +++ b/lisp/progmodes/ruby-mode.el
> @@ -916,11 +916,14 @@ ruby-smie-rules
>               (smie-indent--hanging-p))
>          ruby-indent-level)))
>       (`(:before . "=")
> -     (save-excursion
> -      (and (smie-rule-parent-p " @ ")
> -           (goto-char (nth 1 (smie-indent--parent)))
> -           (smie-rule-prev-p "def=")
> -           (cons 'column (+ (current-column) ruby-indent-level -3)))))
> +     (or
> +      (save-excursion
> +        (and (smie-rule-parent-p " @ ")
> +             (goto-char (nth 1 (smie-indent--parent)))
> +             (smie-rule-prev-p "def=")
> +             (cons 'column (+ (current-column) ruby-indent-level -3))))
> +      (and (smie-rule-parent-p ",")
> +           (smie-rule-parent))))
>       (`(:after . ,(or "?" ":"))
>        (if ruby-after-operator-indent
>            ruby-indent-level

This works for me for this case, thank you.

Aaron