;;; smie.el --- Simple Minded Indentation Engine -*- lexical-binding: t -*-
-;; Copyright (C) 2010-2014 Free Software Foundation, Inc.
+;; Copyright (C) 2010-2015 Free Software Foundation, Inc.
;; Author: Stefan Monnier <monnier@iro.umontreal.ca>
;; Keywords: languages, lisp, internal, parsing, indentation
an open-paren, whereas a RIGHT-LEVEL of nil would correspond to something
like a close-paren.")
-(defvar smie-forward-token-function 'smie-default-forward-token
+(defvar smie-forward-token-function #'smie-default-forward-token
"Function to scan forward for the next token.
Called with no argument should return a token and move to its end.
If no token is found, return nil or the empty string.
It can return nil when bumping into a parenthesis, which lets SMIE
use syntax-tables to handle them in efficient C code.")
-(defvar smie-backward-token-function 'smie-default-backward-token
+(defvar smie-backward-token-function #'smie-default-backward-token
"Function to scan backward the previous token.
Same calling convention as `smie-forward-token-function' except
it should move backward to the beginning of the previous token.")
(condition-case err
(progn (funcall next-sexp 1) nil)
(scan-error
- (let ((epos (nth 2 err)))
+ (let* ((epos1 (nth 2 err))
+ (epos (if (<= (point) epos1) (nth 3 err) epos1)))
(goto-char pos)
(throw 'return
(list t epos
nil: we skipped over an identifier, matched parentheses, ..."
(smie-next-sexp
(indirect-function smie-backward-token-function)
- (indirect-function 'backward-sexp)
- (indirect-function 'smie-op-left)
- (indirect-function 'smie-op-right)
+ (indirect-function #'backward-sexp)
+ (indirect-function #'smie-op-left)
+ (indirect-function #'smie-op-right)
halfsexp))
(defun smie-forward-sexp (&optional halfsexp)
nil: we skipped over an identifier, matched parentheses, ..."
(smie-next-sexp
(indirect-function smie-forward-token-function)
- (indirect-function 'forward-sexp)
- (indirect-function 'smie-op-right)
- (indirect-function 'smie-op-left)
+ (indirect-function #'forward-sexp)
+ (indirect-function #'smie-op-right)
+ (indirect-function #'smie-op-left)
halfsexp))
;;; Miscellaneous commands using the precedence parser.
:type 'integer
:group 'smie)
-(defvar smie-rules-function 'ignore
+(defvar smie-rules-function #'ignore
"Function providing the indentation rules.
It takes two arguments METHOD and ARG where the meaning of ARG
and the expected return value depends on METHOD.
The functions whose name starts with \"smie-rule-\" are helper functions
designed specifically for use in this function.")
+(defvar smie--hanging-eolp-function
+ ;; FIXME: This is a quick hack for 24.4. Don't document it and replace with
+ ;; a well-defined function with a cleaner interface instead!
+ (lambda ()
+ (skip-chars-forward " \t")
+ (or (eolp)
+ (and ;; (looking-at comment-start-skip) ;(bug#16041).
+ (forward-comment (point-max))))))
+
(defalias 'smie-rule-hanging-p 'smie-indent--hanging-p)
(defun smie-indent--hanging-p ()
"Return non-nil if the current token is \"hanging\".
(not (eobp))
;; Could be an open-paren.
(forward-char 1))
- (skip-chars-forward " \t")
- (or (eolp)
- (and ;; (looking-at comment-start-skip) ;(bug#16041).
- (forward-comment (point-max))))
+ (funcall smie--hanging-eolp-function)
(point))))))
(defalias 'smie-rule-bolp 'smie-indent--bolp)
(append smie-blink-matching-triggers
(delete-dups triggers)))))))
+(declare-function edebug-instrument-function "edebug" (func))
+
(defun smie-edebug ()
"Instrument the `smie-rules-function' for Edebug."
(interactive)
otraces)
;; Finally, guess the indentation rules.
- (let ((ssigs nil)
- (rules nil))
- ;; Sort the sigs by frequency of occurrence.
- (maphash (lambda (sig sig-data) (push (cons sig sig-data) ssigs)) sigs)
- (setq ssigs (sort ssigs (lambda (sd1 sd2) (> (cadr sd1) (cadr sd2)))))
- (while ssigs
- (pcase-let ((`(,sig ,total ,off-alist ,cotraces) (pop ssigs)))
- (cl-assert (= total (apply #'+ (mapcar #'cdr off-alist))))
- (let* ((sorted-off-alist
- (sort off-alist (lambda (x y) (> (cdr x) (cdr y)))))
- (offset (caar sorted-off-alist)))
- (if (zerop offset)
- ;; Nothing to do with this sig; indentation is
- ;; correct already.
- nil
- (push (cons (+ offset (nth 2 sig)) sig) rules)
- ;; Adjust the rest of the data.
- (pcase-dolist ((and cotrace `(,count ,toffset ,trace))
- cotraces)
- (setf (nth 1 cotrace) (- toffset offset))
- (dolist (sig trace)
- (let ((sig-data (cdr (assq sig ssigs))))
- (when sig-data
- (let* ((ooff-data (assq toffset (nth 1 sig-data)))
- (noffset (- toffset offset))
- (noff-data
- (or (assq noffset (nth 1 sig-data))
- (let ((off-data (cons noffset 0)))
- (push off-data (nth 1 sig-data))
- off-data))))
- (cl-assert (>= (cdr ooff-data) count))
- (cl-decf (cdr ooff-data) count)
- (cl-incf (cdr noff-data) count))))))))))
- (message "Guessing...done")
- rules))))
+ (prog1
+ (smie-config--guess-1 sigs)
+ (message "Guessing...done")))))
+
+(defun smie-config--guess-1 (sigs)
+ (let ((ssigs nil)
+ (rules nil))
+ ;; Sort the sigs by frequency of occurrence.
+ (maphash (lambda (sig sig-data) (push (cons sig sig-data) ssigs)) sigs)
+ (setq ssigs (sort ssigs (lambda (sd1 sd2) (> (cadr sd1) (cadr sd2)))))
+ (while ssigs
+ (pcase-let ((`(,sig ,total ,off-alist ,cotraces) (pop ssigs)))
+ (cl-assert (= total (apply #'+ (mapcar #'cdr off-alist))))
+ (let* ((sorted-off-alist
+ (sort off-alist (lambda (x y) (> (cdr x) (cdr y)))))
+ (offset (caar sorted-off-alist)))
+ (if (zerop offset)
+ ;; Nothing to do with this sig; indentation is
+ ;; correct already.
+ nil
+ (push (cons (+ offset (nth 2 sig)) sig) rules)
+ ;; Adjust the rest of the data.
+ (pcase-dolist ((and cotrace `(,count ,toffset . ,trace))
+ cotraces)
+ (setf (nth 1 cotrace) (- toffset offset))
+ (dolist (sig trace)
+ (let ((sig-data (cdr (assq sig ssigs))))
+ (when sig-data
+ (let* ((ooff-data (assq toffset (nth 1 sig-data)))
+ (noffset (- toffset offset))
+ (noff-data
+ (or (assq noffset (nth 1 sig-data))
+ (let ((off-data (cons noffset 0)))
+ (push off-data (nth 1 sig-data))
+ off-data))))
+ (cl-assert (>= (cdr ooff-data) count))
+ (cl-decf (cdr ooff-data) count)
+ (cl-incf (cdr noff-data) count))))))))))
+ rules))
(defun smie-config-guess ()
"Try and figure out this buffer's indentation settings.
(cond
((null config) (message "Nothing to change"))
((null smie-config--buffer-local)
- (message "Local rules set")
- (setq smie-config--buffer-local config))
+ (smie-config-local config)
+ (message "Local rules set"))
((y-or-n-p "Replace existing local config? ")
(message "Local rules replaced")
- (setq smie-config--buffer-local config))
+ (smie-config-local config))
((y-or-n-p "Merge with existing local config? ")
(message "Local rules adjusted")
- (setq smie-config--buffer-local
- (append config smie-config--buffer-local)))
+ (smie-config-local (append config smie-config--buffer-local)))
(t
(message "Rules guessed: %S" config)))))