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Misc minor pending tweaks

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* yasnippet.el (yas-minor-mode): Fix docstring (issue#1210).
(yas--save-restriction-and-widen): Use workaround only for the old
Emacsen where it was needed.
(yas--snippet-create): Adjust Emacs version where CC-mode needed
a workaround.
(help-snippet-def): Remove useless use of `purecopy`.
This commit is contained in:
Stefan Monnier 2025-04-03 12:40:54 -04:00
parent 5b315f1753
commit 2c20b10fc3
1 changed files with 15 additions and 21 deletions
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36
yasnippet.el
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@ -891,18 +891,10 @@ which decides on the snippet to expand.")
;;;###autoload
(define-minor-mode yas-minor-mode
"Toggle YASnippet mode.
"YASnippet minor mode.
When YASnippet mode is enabled, `yas-expand', normally bound to
the TAB key, expands snippets of code depending on the major
mode.
With no argument, this command toggles the mode.
positive prefix argument turns on the mode.
Negative prefix argument turns off the mode.
Key bindings:
\\{yas-minor-mode-map}"
the TAB key, expands snippets of code depending on the major mode."
:lighter " yas" ;; The indicator for the mode line.
(cond ((and yas-minor-mode (featurep 'yasnippet))
;; Install the direct keymaps in `emulation-mode-map-alists'
@ -1463,7 +1455,7 @@ Returns (TEMPLATES START END). This function respects
(defun yas--remove-misc-free-from-undo (old-undo-list)
"Tries to work around Emacs Bug#30931.
Helper function for `yas--save-restriction-and-widen'."
;; If Bug#30931 is unfixed, we get (#<Lisp_Misc_Free> . INTEGER)
;; If Bug#30931 is unfixed (Emacs<26.2), we get (#<Lisp_Misc_Free> . INTEGER)
;; entries in the undo list. If we call `type-of' on the
;; Lisp_Misc_Free object then Emacs aborts, so try to find it by
;; checking that its type is none of the expected ones.
@ -1487,15 +1479,16 @@ Helper function for `yas--save-restriction-and-widen'."
(defmacro yas--save-restriction-and-widen (&rest body)
"Equivalent to (save-restriction (widen) BODY).
Also tries to work around Emacs Bug#30931."
Also tries to work around Emacs Bug#30931, fixed in Emacs-26.2."
(declare (debug (body)) (indent 0))
;; Disable garbage collection, since it could cause an abort.
`(let ((gc-cons-threshold most-positive-fixnum)
(old-undo-list buffer-undo-list))
(prog1 (save-restriction
(widen)
,@body)
(yas--remove-misc-free-from-undo old-undo-list))))
(let ((main `(save-restriction (widen) ,@body)))
(if (< emacs-major-version 27)
;; Disable garbage collection, since it could cause an abort.
`(let ((gc-cons-threshold most-positive-fixnum)
(old-undo-list buffer-undo-list))
(prog1 ,main
(yas--remove-misc-free-from-undo old-undo-list)))
main)))
(defun yas--eval-for-string (form)
"Evaluate FORM and convert the result to string."
@ -4133,7 +4126,7 @@ Returns the newly created snippet."
(unwind-protect
(let ((buffer-undo-list t))
(goto-char begin)
(if (> emacs-major-version 29)
(if (< emacs-major-version 27)
;; Don't use the workaround for CC-mode's cache,
;; since it was presumably a bug in CC-mode, so either
;; it's fixed already, or it should get fixed.
@ -4161,6 +4154,7 @@ Returns the newly created snippet."
(run-hook-with-args 'after-change-functions
(point-min) (point-max)
(- end begin))))
;; FIXME: Use `undo-amalgamate-change-group'?
(when (listp buffer-undo-list)
(push (cons (point-min) (point-max))
buffer-undo-list)))
@ -5056,7 +5050,7 @@ object satisfying `yas--field-p' to restrict the expansion to.")))
(define-button-type 'help-snippet-def
:supertype 'help-xref
'help-function (lambda (template) (yas--visit-snippet-file-1 template))
'help-echo (purecopy "mouse-2, RET: find snippets's definition"))
'help-echo "mouse-2, RET: find snippets's definition")
(defun yas--snippet-description-finish-runonce ()
"Final adjustments for the help buffer when snippets are concerned."