Add back in a check that the leading `-' exists for arguments. This

[mandoc.git] / mandoc_char.7

diff --git a/mandoc_char.7 b/mandoc_char.7
index 20b9f9475f3a4d6389de0cb2105a10da17109c7d..d0c5dd7f801fd864bbb120580c6f8672b90bf87a 100644 (file)
--- a/mandoc_char.7
+++ b/mandoc_char.7
@@ -1,4 +1,4 @@
-.\"    $Id: mandoc_char.7,v 1.43 2011/04/20 22:50:22 kristaps Exp $
+.\"    $Id: mandoc_char.7,v 1.45 2011/05/15 15:30:33 kristaps Exp $
 .\"
 .\" Copyright (c) 2009 Kristaps Dzonsons <kristaps@bsd.lv>
 .\"
@@ -14,7 +14,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: April 20 2011 $
+.Dd $Mdocdate: May 15 2011 $
 .Dt MANDOC_CHAR 7
 .Os
 .Sh NAME
@@ -520,6 +520,20 @@ portable.
 .It \e*(Px   Ta \*(Px       Ta POSIX standard name
 .It \e*(Ai   Ta \*(Ai       Ta ANSI standard name
 .El
+.Sh UNICODE CHARACTERS
+The escape sequence
+.Pp
+.Dl \e[uXXXX]
+.Pp
+is interpreted as a Unicode codepoint.
+The codepoint must be in the range above U+0080 and less than U+10FFFF.
+For compatibility, points must be zero-padded to four characters; if
+greater than four characters, no zero padding is allowed.
+Unicode surrogates are not allowed.
+.\" .Pp
+.\" Unicode glyphs attenuate to the
+.\" .Sq \&?
+.\" character if invalid or not rendered by current output media.
 .Sh NUMBERED CHARACTERS
 For backward compatibility with existing manuals,
 .Xr mandoc 1
@@ -542,6 +556,9 @@ troff implementations, at this time limited to GNU troff
 .Pp
 .Bl -dash -compact
 .It
+The \eN\(aq\(aq escape sequence is limited to printable characters; in
+groff, it accepts arbitrary character numbers.
+.It
 In
 .Fl T Ns Cm ascii ,
 the