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Be more careful about indent-sexp going over eol (Bug#35286)

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* lisp/emacs-lisp/lisp-mode.el (indent-sexp): Only go over multiple
sexps if the end of line is within a sexp.
* test/lisp/emacs-lisp/lisp-mode-tests.el
(indent-sexp-stop-before-eol-comment)
(indent-sexp-stop-before-eol-non-lisp): New tests.
This commit is contained in:
Noam Postavsky 2019-04-15 18:49:57 -04:00
parent 3988e93d4b
commit 93912baefd
2 changed files with 42 additions and 8 deletions
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12
lisp/emacs-lisp/lisp-mode.el
View File

@ -1205,19 +1205,25 @@ ENDPOS is encountered."
;; Get error now if we don't have a complete sexp
;; after point.
(save-excursion
(let ((eol (line-end-position)))
(forward-sexp 1)
(let ((eol (line-end-position)))
;; We actually look for a sexp which ends
;; after the current line so that we properly
;; indent things like #s(...). This might not
;; be needed if Bug#15998 is fixed.
(when (and (< (point) eol)
;; Check if eol is within a sexp.
(> (nth 0 (save-excursion
(parse-partial-sexp
(point) eol)))
0))
(condition-case ()
(while (and (< (point) eol) (not (eobp)))
(while (< (point) eol)
(forward-sexp 1))
;; But don't signal an error for incomplete
;; sexps following the first complete sexp
;; after point.
(scan-error nil)))
(scan-error nil))))
(point)))))
(save-excursion
(while (let ((indent (lisp-indent-calc-next parse-state))

28
test/lisp/emacs-lisp/lisp-mode-tests.el
View File

@ -136,6 +136,34 @@ noindent\" 3
(indent-sexp)
(should (equal (buffer-string) "(())"))))
(ert-deftest indent-sexp-stop-before-eol-comment ()
"`indent-sexp' shouldn't look for more sexps after an eol comment."
;; See https://debbugs.gnu.org/35286.
(with-temp-buffer
(emacs-lisp-mode)
(let ((str "() ;;\n x"))
(insert str)
(goto-char (point-min))
(indent-sexp)
;; The "x" is in the next sexp, so it shouldn't get indented.
(should (equal (buffer-string) str)))))
(ert-deftest indent-sexp-stop-before-eol-non-lisp ()
"`indent-sexp' shouldn't be too agressive in non-Lisp modes."
;; See https://debbugs.gnu.org/35286#13.
(with-temp-buffer
(prolog-mode)
(let ((str "\
x(H) -->
{y(H)}.
a(A) -->
b(A)."))
(insert str)
(search-backward "{")
(indent-sexp)
;; There's no line-spanning sexp, so nothing should be indented.
(should (equal (buffer-string) str)))))
(ert-deftest lisp-indent-region ()
"Test basics of `lisp-indent-region'."
(with-temp-buffer