(texinfo-format-scan): Signal an error if

@ follows an accent command such as @'.  Support optional braces
in commands that insert accents, like makeinfo does.

2 files changed, 23 insertions, 1 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index cb469756610..dd927559b4d 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,9 @@
+2001-02-22  Eli Zaretskii  <eliz@is.elta.co.il>
+
+        * textmodes/texinfmt.el (texinfo-format-scan): Signal an error if
+        @ follows an accent command such as @'.  Support optional braces
+        in commands that insert accents, like makeinfo does.
+
 2001-02-22  Gerd Moellmann  <gerd@gnu.org>
 
         * startup.el (fancy-splash-text): Add a line for ordering
diff --git a/lisp/textmodes/texinfmt.el b/lisp/textmodes/texinfmt.el
index 822631e039b..0441602b3a7 100644
--- a/lisp/textmodes/texinfmt.el
+++ b/lisp/textmodes/texinfmt.el
@@ -868,7 +868,23 @@ lower types.")
          ;; Otherwise: the other characters are simply quoted.  Delete the @.
          (t
          (delete-char -1)
-         (forward-char 1)))
+         ;; Be compatible with makeinfo: if @' and its ild are
+         ;; followed by a @ without a brace, barf.
+         (if (looking-at "[\"'^`~=]")
+             (progn
+               (if (= (char-after (1+ (point))) ?@)
+                   (error "Use braces to give a command as an argument to @%c"
+                          (following-char)))
+               (forward-char 1)
+               ;; @' etc. can optionally accept their argument in
+               ;; braces (makeinfo supports that).
+               (when (looking-at "{")
+                 (let ((start (point)))
+                   (forward-list 1)
+                   (delete-char -1)
+                   (goto-char start)
+                   (delete-char 1))))
+           (forward-char 1))))
       ;; @ is followed by a command-word; find the end of the word.
       (setq texinfo-command-start (1- (point)))
       (if (= (char-syntax (following-char)) ?w)