From: Stefan Monnier Date: Sun, 3 Jul 2022 15:12:45 +0000 (-0400) Subject: lisp/elec-pair.el: Simplify last change X-Git-Tag: emacs-29.0.90~1447^2~1233 X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=bfc9e7669688b3439cfdd2d5972065b95eae812f;p=emacs.git lisp/elec-pair.el: Simplify last change * lisp/elec-pair.el (electric-pair--with-syntax): Rename from `electric-pair--with-text-syntax`. Make `start` mandatory. Run `body` in the normal syntax if `start` is nil. (electric-pair--with-syntax-1): New function, extracted from `electric-pair--with-text-syntax`. (electric-pair-syntax-info, electric-pair--balance-info): Adjust calls accordingly. --- diff --git a/lisp/elec-pair.el b/lisp/elec-pair.el index 247e9b93ec2..4b901071cd9 100644 --- a/lisp/elec-pair.el +++ b/lisp/elec-pair.el @@ -188,24 +188,29 @@ be considered.") ;; I also find it often preferable not to pair next to a word. (eq (char-syntax (following-char)) ?w))) -(cl-defmacro electric-pair--with-text-syntax ((&optional start) &rest body) - "Run BODY with `electric-pair-text-syntax-table' active. -This ensures that all syntax related values are set properly and the -`syntax-ppss' cache is cleared before and after. -In particular, this must be used when BODY contains code which may -update the `syntax-ppss' cache. This includes calling -`parse-partial-sexp' and any sexp-based movement functions when -`parse-sexp-lookup-properties' is non-nil. The cache is flushed from -position START, defaulting to point." - (declare (debug ((&optional form) body)) (indent 1)) - (let ((start-var (make-symbol "start"))) - `(let ((syntax-propertize-function nil) - (,start-var ,(or start '(point)))) - (syntax-ppss-flush-cache ,start-var) +(defmacro electric-pair--with-syntax (string-or-comment &rest body) + "Run BODY with appropriate syntax table active. +STRING-OR-COMMENT is the start position of the string/comment +in which we are, if applicable. +Uses the text-mode syntax table if within a string or a comment." + (declare (debug t) (indent 1)) + `(electric-pair--with-syntax-1 ,string-or-comment (lambda () ,@body))) + +(defun electric-pair--with-syntax-1 (string-or-comment body-fun) + (if (not string-or-comment) + (funcall body-fun) + ;; Here we assume that the `syntax-ppss' cache has already been filled + ;; past `string-or-comment' with data corresponding to the "normal" syntax + ;; (this should be the case because STRING-OR-COMMENT was returned + ;; in the `nth 8' of `syntax-ppss'). + ;; Maybe we should narrow-to-region so that `syntax-ppss' uses the narrow + ;; cache? + (syntax-ppss-flush-cache string-or-comment) + (let ((syntax-propertize-function nil)) (unwind-protect (with-syntax-table electric-pair-text-syntax-table - ,@body) - (syntax-ppss-flush-cache ,start-var))))) + (funcall body-fun)) + (syntax-ppss-flush-cache string-or-comment))))) (defun electric-pair-syntax-info (command-event) "Calculate a list (SYNTAX PAIR UNCONDITIONAL STRING-OR-COMMENT-START). @@ -222,13 +227,10 @@ inside a comment or string." (string-or-comment (and post-string-or-comment pre-string-or-comment)) (table-syntax-and-pair - (cl-flet ((f () - (list (char-syntax command-event) - (or (matching-paren command-event) - command-event)))) - (if string-or-comment - (electric-pair--with-text-syntax () (f)) - (f)))) + (electric-pair--with-syntax string-or-comment + (list (char-syntax command-event) + (or (matching-paren command-event) + command-event)))) (fallback (if string-or-comment (append electric-pair-text-pairs electric-pair-pairs) @@ -275,7 +277,7 @@ when to fallback to `parse-partial-sexp'." (skip-syntax-forward " >!") (point))))) (if s-or-c-start - (electric-pair--with-text-syntax (s-or-c-start) + (electric-pair--with-syntax s-or-c-start (parse-partial-sexp s-or-c-start pos)) ;; HACK! cc-mode apparently has some `syntax-ppss' bugs (if (memq major-mode '(c-mode c++ mode)) @@ -293,7 +295,8 @@ when to fallback to `parse-partial-sexp'." (defun electric-pair--balance-info (direction string-or-comment) "Examine lists forward or backward according to DIRECTION's sign. -STRING-OR-COMMENT is info suitable for running `parse-partial-sexp'. +STRING-OR-COMMENT is the position of the start of the comment/string +in which we are, if applicable. Return a cons of two descriptions (MATCHED-P . PAIR) for the innermost and outermost lists that enclose point. The outermost @@ -325,14 +328,11 @@ If point is not enclosed by any lists, return ((t) . (t))." (cond ((< direction 0) (condition-case nil (eq (char-after pos) - (cl-flet ((f () - (matching-paren - (char-before - (scan-sexps (point) 1))))) - (if string-or-comment - (electric-pair--with-text-syntax () - (f)) - (f)))) + (electric-pair--with-syntax + string-or-comment + (matching-paren + (char-before + (scan-sexps (point) 1))))) (scan-error nil))) (t ;; In this case, no need to use @@ -346,9 +346,8 @@ If point is not enclosed by any lists, return ((t) . (t))." (opener (char-after start))) (and start (eq (char-before pos) - (or (if string-or-comment - (electric-pair--with-text-syntax () - (matching-paren opener)) + (or (electric-pair--with-syntax + string-or-comment (matching-paren opener)) opener)))))))) (actual-pair (if (> direction 0) @@ -361,14 +360,11 @@ If point is not enclosed by any lists, return ((t) . (t))." (save-excursion (while (not outermost) (condition-case err - (cl-flet ((f () - (scan-sexps (point) (if (> direction 0) - (point-max) - (- (point-max)))) - (funcall at-top-level-or-equivalent-fn))) - (if string-or-comment - (electric-pair--with-text-syntax () (f)) - (f))) + (electric-pair--with-syntax string-or-comment + (scan-sexps (point) (if (> direction 0) + (point-max) + (- (point-max)))) + (funcall at-top-level-or-equivalent-fn)) (scan-error (cond ((or ;; some error happened and it is not of the "ended