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* lisp/emacs-lisp/eldoc.el (eldoc--supported-p): Understand the "old" API

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Stefan Monnier 2020-03-12 11:18:07 -04:00
parent f253ff7b78
commit 2d221c8d87
1 changed files with 10 additions and 1 deletions
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11
lisp/emacs-lisp/eldoc.el
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@ -404,7 +404,16 @@ effect."
(defun eldoc--supported-p ()
"Non-nil if an ElDoc function is set for this buffer."
(and (not (memq eldoc-documentation-function '(nil ignore)))
eldoc-documentation-functions))
(or eldoc-documentation-functions
;; The old API had major modes set `eldoc-documentation-function'
;; to provide eldoc support. It's impossible now to determine
;; reliably whether the `eldoc-documentation-function' provides
;; eldoc support (as in the old API) or whether it just provides
;; a way to combine the results of the
;; `eldoc-documentation-functions' (as in the new API).
;; But at least if it's set buffer-locally it's a good hint that
;; there's some eldoc support in the current buffer.
(local-variable-p 'eldoc-documentation-function))))
(defun eldoc-print-current-symbol-info ()
"Print the text produced by `eldoc-documentation-function'."