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Document support for ':documentation' in Lisp mode

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* lisp/emacs-lisp/lisp-mode.el (lisp-string-in-doc-position-p)
(lisp-string-after-doc-keyword-p)
(lisp-font-lock-syntactic-face-function): Add doc strings.
This commit is contained in:
Shakthi Kannan 2015-12-30 19:59:12 +02:00 • committed by Eli Zaretskii
parent c930e75bfa
commit 86312ffd93
2 changed files with 14 additions and 0 deletions
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5
etc/NEWS
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@ -638,7 +638,12 @@ respectively, `show-paren-when-point-inside-paren' or
`show-paren-when-point-in-periphery'.
** Lisp mode
---
*** Strings after `:documentation' are highlighted as docstrings.
This enhances Lisp mode fontification to handle documentation of the
form `(:documentation "the doc string")' used in Common Lisp code for
CLOS class and slot documentation.
** Rectangle editing

9
lisp/emacs-lisp/lisp-mode.el
View file

@ -488,6 +488,9 @@ This will generate compile-time constants from BINDINGS."
"Default expressions to highlight in Lisp modes.")
(defun lisp-string-in-doc-position-p (listbeg startpos)
"Return true if a doc string may occur at STARTPOS inside a list.
LISTBEG is the position of the start of the innermost list
containing STARTPOS."
(let* ((firstsym (and listbeg
(save-excursion
(goto-char listbeg)
@ -518,6 +521,9 @@ This will generate compile-time constants from BINDINGS."
(= (point) startpos))))))
(defun lisp-string-after-doc-keyword-p (listbeg startpos)
"Return true if `:documentation' symbol ends at STARTPOS inside a list.
LISTBEG is the position of the start of the innermost list
containing STARTPOS."
(and listbeg ; We are inside a Lisp form.
(save-excursion
(goto-char startpos)
@ -526,6 +532,9 @@ This will generate compile-time constants from BINDINGS."
(looking-at ":documentation\\_>"))))))
(defun lisp-font-lock-syntactic-face-function (state)
"Return syntactic face function for the position represented by STATE.
STATE is a `parse-partial-sexp' state, and the returned function is the
Lisp font lock syntactic face function."
(if (nth 3 state)
;; This might be a (doc)string or a |...| symbol.
(let ((startpos (nth 8 state)))