GNU bug report logs - #16116
24.3.50; smie-indent-close aligns inner closing paren with the outer opening paren

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From: Dmitry Gutov <dgutov <at> yandex.ru>
To: Stefan Monnier <monnier <at> IRO.UMontreal.CA>
Cc: 16116 <at> debbugs.gnu.org, Steve Purcell <steve <at> sanityinc.com>
Subject: bug#16116: 24.3.50; smie-indent-close aligns inner closing paren with the outer opening paren
Date: Mon, 16 Dec 2013 01:22:10 +0200

[Message part 1 (text/plain, inline)]

Stefan Monnier <monnier <at> IRO.UMontreal.CA> writes:

> No, the rule should be something like
>
>    (`(:close-all . ,_) t)

Ah, ok. How does this look to you?

Note that it makes the new behavior the default one, because "close all"
sounds more fitting to characterize the current behavior ("closing" all
sexps ending on the current line).

If that's not what you meant, maybe a different method name is in order.

[smie-close-all.diff (text/x-diff, inline)]

=== modified file 'lisp/emacs-lisp/smie.el'
--- lisp/emacs-lisp/smie.el	2013-12-11 15:59:27 +0000
+++ lisp/emacs-lisp/smie.el	2013-12-15 23:09:35 +0000
@@ -1135,6 +1135,10 @@
 - :list-intro, in which case ARG is a token and the function should return
   non-nil if TOKEN is followed by a list of expressions (not separated by any
   token) rather than an expression.
+- :close-all, in which case ARG is a close-paren token at indentation and
+  the function should return non-nil if it should be aligned with the opener
+  of the last close-paren token on the same line, if there are multiple.
+  Otherwise, it will be aligned with its own opener.
 
 When ARG is a token, the function is called with point just before that token.
 A return value of nil always means to fallback on the default behavior, so the
@@ -1316,8 +1320,8 @@
 (defun smie-indent--rule (method token
                           ;; FIXME: Too many parameters.
                           &optional after parent base-pos)
-  "Compute indentation column according to `indent-rule-functions'.
-METHOD and TOKEN are passed to `indent-rule-functions'.
+  "Compute indentation column according to `smie-rules-function'.
+METHOD and TOKEN are passed to `smie-rules-function'.
 AFTER is the position after TOKEN, if known.
 PARENT is the parent info returned by `smie-backward-sexp', if known.
 BASE-POS is the position relative to which offsets should be applied."
@@ -1330,11 +1334,7 @@
   ;; - :after tok, where
   ;;                  ; after is set; parent=nil; base-pos=point;
   (save-excursion
-    (let ((offset
-           (let ((smie--parent parent)
-                 (smie--token token)
-                 (smie--after after))
-             (funcall smie-rules-function method token))))
+    (let ((offset (smie-indent--rule-1 method token after parent)))
       (cond
        ((not offset) nil)
        ((eq (car-safe offset) 'column) (cdr offset))
@@ -1355,6 +1355,12 @@
                  (smie-indent-virtual) (current-column)))))
        (t (error "Unknown indentation offset %s" offset))))))
 
+(defun smie-indent--rule-1 (method token &optional after parent)
+  (let ((smie--parent parent)
+        (smie--token token)
+        (smie--after after))
+    (funcall smie-rules-function method token)))
+
 (defun smie-indent-forward-token ()
   "Skip token forward and return it, along with its levels."
   (let ((tok (funcall smie-forward-token-function)))
@@ -1423,8 +1429,13 @@
   (save-excursion
     ;; (forward-comment (point-max))
     (when (looking-at "\\s)")
-      (while (not (zerop (skip-syntax-forward ")")))
-        (skip-chars-forward " \t"))
+      (if (smie-indent--rule-1 :close-all
+                               (buffer-substring-no-properties
+                                (point) (1+ (point)))
+                               (1+ (point)))
+          (while (not (zerop (skip-syntax-forward ")")))
+            (skip-chars-forward " \t"))
+        (forward-char 1))
       (condition-case nil
           (progn
             (backward-sexp 1)

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