Setup SMIE

[ybiquitous]

https://www.gnu.org/software/emacs/manual/html_node/elisp/SMIE.html

[ybiquitous]

The current implementation of indentation is naive:

rbs-mode/rbs-mode.el

Lines 43 to 74 in 40d71eb

	(defun rbs-indent-line ()
	"Correct the indentation of the current RBS line."
	(indent-line-to (rbs-calculate-indent-level)))
	(defun rbs-calculate-indent-level ()
	"Return the proper indentation level of the current line."
	(save-excursion
	(let* ((prev-level (rbs-previous-indent-level))
	(block-start-line-re (concat "^[[:space:]]*" (regexp-opt '("class" "module" "interface") 'symbols)))
	(block-end-line-re (concat "^[[:space:]]*" (regexp-opt '("end") 'symbols))))
	(cond
	((string-match-p block-start-line-re (rbs-previous-line))
	(+ prev-level rbs-indent-level))
	((string-match-p block-end-line-re (rbs-current-line))
	(max 0 (- prev-level rbs-indent-level)))
	(t prev-level)))))
	(defun rbs-current-line ()
	"Return the current line."
	(string-trim-right (thing-at-point 'line t)))
	(defun rbs-previous-line ()
	"Return the previous line."
	(save-excursion
	(forward-line -1)
	(string-trim-right (thing-at-point 'line t))))
	(defun rbs-previous-indent-level ()
	"Return the previous indent level."
	(save-excursion
	(forward-line -1)
	(current-indentation)))