# HG changeset patch
# User Christian Brabandt <cb@256bit.org>
# Date 1692552604 -7200
# Node ID dcab5385dd020c60f47df8a954c426747ad9ead4
# Parent  ba87e3f0ffe49dabd9283e9f1b15d71af1a6e9f5
patch 9.0.1767: '.-' no allowed in highlight group names

Commit: https://github.com/vim/vim/commit/d4376dc3ebea91abcb4d9ef9963ef5b968048b78
Author: Gregory Anders <greg@gpanders.com>
Date:   Sun Aug 20 19:14:03 2023 +0200

    patch 9.0.1767: '.-' no allowed in highlight group names

    Problem:  '.-' no allowed in highlight group names
    Solution: Allow dot and hyphen characters in highlight group names

    Allow dots and hyphens in group names. There does not seem
    to be any reason for these to be disallowed.

    closes: #12807

    Signed-off-by: Christian Brabandt <cb@256bit.org>
    Co-authored-by: Gregory Anders <greg@gpanders.com>
    Co-authored-by: Sean Dewar <seandewar@users.noreply.github.com>

diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
--- a/runtime/doc/syntax.txt
+++ b/runtime/doc/syntax.txt
@@ -214,10 +214,10 @@ A syntax group name is to be used for sy
 thing.  These are then linked to a highlight group that specifies the color.
 A syntax group name doesn't specify any color or attributes itself.
 
-The name for a highlight or syntax group must consist of ASCII letters, digits
-and the underscore.  As a regexp: "[a-zA-Z0-9_]*".  However, Vim does not give
-an error when using other characters.  The maximum length of a group name is
-about 200 bytes.  *E1249*
+The name for a highlight or syntax group must consist of ASCII letters,
+digits, underscores, dots, or hyphens.  As a regexp: "[a-zA-Z0-9_.-]*".
+However, Vim does not give an error when using other characters.  The maximum
+length of a group name is about 200 bytes.  *E1249*
 
 To be able to allow each user to pick their favorite set of colors, there must
 be preferred names for highlight groups that are common for many languages.
diff --git a/src/highlight.c b/src/highlight.c
--- a/src/highlight.c
+++ b/src/highlight.c
@@ -3452,7 +3452,7 @@ syn_add_group(char_u *name)
     char_u	*p;
     char_u	*name_up;
 
-    // Check that the name is ASCII letters, digits and underscore.
+    // Check that the name is valid (ASCII letters, digits, underscores, dots, or hyphens).
     for (p = name; *p != NUL; ++p)
     {
 	if (!vim_isprintc(*p))
@@ -3461,7 +3461,7 @@ syn_add_group(char_u *name)
 	    vim_free(name);
 	    return 0;
 	}
-	else if (!ASCII_ISALNUM(*p) && *p != '_')
+	else if (!ASCII_ISALNUM(*p) && *p != '_' && *p != '.' && *p != '-')
 	{
 	    // This is an error, but since there previously was no check only
 	    // give a warning.
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1767,
+/**/
     1765,
 /**/
     1764,