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

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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>
This commit is contained in:
Gregory Anders
2023-08-20 19:14:03 +02:00
committed by Christian Brabandt
parent bedc69f9d6
commit d4376dc3eb
3 changed files with 8 additions and 6 deletions
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8
runtime/doc/syntax.txt
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@ -214,10 +214,10 @@ A syntax group name is to be used for syntax items that match the same kind of
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.