Re: Unicode character read representation

[Kenichi Handa <handa@m17n.org>]

In article <jwvzlg9dyo4.fsf-monnier+emacs@gnu.org>, Stefan Monnier <monnier@iro.umontreal.ca> writes:

> > For instance 0xFFFF is a valid Unicode code-point, but is
> > not a character.  Should it be accepted or not?

> Yes, it should.  But I think that \u3FFFFF shouldn't since it's not
> a valid unicode code point.

Ok, I've just installed this change.

Index: lread.c
===================================================================
RCS file: /cvsroot/emacs/emacs/src/lread.c,v
retrieving revision 1.403
retrieving revision 1.404
diff -u -r1.403 -r1.404
--- lread.c	25 Feb 2009 12:47:24 -0000	1.403
+++ lread.c	27 Feb 2009 00:48:03 -0000	1.404
@@ -2205,7 +2205,7 @@
       /* A Unicode escape. We only permit them in strings and characters,
 	 not arbitrarily in the source code, as in some other languages.  */
       {
-	int i = 0;
+	unsigned int i = 0;
 	int count = 0;
 
 	while (++count <= unicode_hex_count)
@@ -2222,7 +2222,8 @@
 		break;
 	      }
 	  }
-
+	if (i > 0x10FFFF)
+	  error ("Non-Unicode character: 0x%x", i);
 	return i;
       }
 
---
Kenichi Handa
handa@m17n.org