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* lisp/help-mode.el (help-function-def):

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Allow help-make-xrefs to call with one argument.  (Bug#29611)
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Glenn Morris 2017-12-07 20:30:39 -05:00
parent 05720162c1
commit c0a670a8b5
1 changed files with 18 additions and 20 deletions
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38
lisp/help-mode.el
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@ -192,20 +192,24 @@ The format is (FUNCTION ARGS...).")
(define-button-type 'help-function-def
:supertype 'help-xref
'help-function (lambda (fun file &optional type)
(require 'find-func)
(when (eq file 'C-source)
(setq file
(help-C-file-name (indirect-function fun) 'fun)))
;; Don't use find-function-noselect because it follows
;; aliases (which fails for built-in functions).
(let ((location
(find-function-search-for-symbol fun type file)))
(pop-to-buffer (car location))
(run-hooks 'find-function-after-hook)
(if (cdr location)
(goto-char (cdr location))
(message "Unable to find location in file"))))
'help-function (lambda (fun &optional file type)
(or file
(setq file (find-lisp-object-file-name fun type)))
(if (not file)
(message "Unable to find defining file")
(require 'find-func)
(when (eq file 'C-source)
(setq file
(help-C-file-name (indirect-function fun) 'fun)))
;; Don't use find-function-noselect because it follows
;; aliases (which fails for built-in functions).
(let ((location
(find-function-search-for-symbol fun type file)))
(pop-to-buffer (car location))
(run-hooks 'find-function-after-hook)
(if (cdr location)
(goto-char (cdr location))
(message "Unable to find location in file")))))
'help-echo (purecopy "mouse-2, RET: find function's definition"))
(define-button-type 'help-function-cmacro ; FIXME: Obsolete since 24.4.
@ -495,12 +499,6 @@ that."
(help-xref-button 8 'help-face sym)))
((match-string 6)) ; nothing for `symbol'
((match-string 7)
;; this used:
;; #'(lambda (arg)
;; (let ((location
;; (find-function-noselect arg)))
;; (pop-to-buffer (car location))
;; (goto-char (cdr location))))
(help-xref-button 8 'help-function-def sym))
((cl-some (lambda (x) (funcall (nth 1 x) sym))
describe-symbol-backends)