from the script.  By
default, it is linked to WarningMsg.  If you do not want to be bothered by
error messages, you can define this to be something invisible.  For example,
if you use the GUI version of Vim and your command line is normally white, you
can do >
	:hi MatchError guifg=white guibg=white
<
						*b:match_ignorecase*
If you >
	:let b:match_ignorecase = 1
then matchit.vim acts as if 'ignorecase' is set: for example, "end" and "END"
are equivalent.  If you >
	:let b:match_ignorecase = 0
then matchit.vim treats "end" and "END" differently.  (There will be no
b:match_infercase option unless someone requests it.)

						*b:match_debug*
Define b:match_debug if you want debugging information to be saved.  See
|matchit-debug|, below.

						*b:match_skip*
If b:match_skip is defined, it is passed as the skip argument to
|searchpair()|.  This controls when matching structures are skipped, or
ignored.  By default, they are ignored inside comments and strings, as
determined by the |syntax| mechanism.  (If syntax highlighting is turned off,
nothing is skipped.)  You can set b:match_skip to a string, which evaluates to
a non-zero, numerical value if the match is to be skipped or zero if the match
should not be skipped.  In addition, the following special values are
supported by matchit.vim:
	s:foo becomes (current syntax item) =~ foo
	S:foo becomes (current syntax item) !~ foo
	r:foo becomes (line before cursor) =~ foo
	R:foo becomes (line before cursor) !~ foo
	t:foo becomes (current treesitter captures) =~ foo
	T:foo becomes (current treesitter captures) !~ foo
(The "s" is meant to suggest "syntax", and the "r" is meant to suggest
"regular expression".)

Examples:

	You can get the default behavior with >
		:let b:match_skip = 's:comment\|string'
<
	If you want to skip matching structures unless they are at the start
	of the line (ignoring whitespace) then you can >
		:let b:match_skip = 'R:^\s*'
<	Do not do this if strings or comments can span several lines, since
	the normal syntax checking will not be done if you set b:match_skip.

	In LaTeX, since "%" is used as the comment character, you can >
		:let b:match_skip = 'r:%'
<	Unfortunately, this will skip anything after "\%", an escaped "%".  To
	allow for this, and also "\\%" (an escaped backslash followed by the
	comment character) you can >
		:let b:match_skip = 'r:\(^\|[^\\]\)\(\\\\\)*%'
<
	See the $VIMRUNTIME/ftplugin/vim.vim for an example that uses both
	syntax and a regular expression.

==============================================================================
4. Supporting a New Language				*matchit-newlang*
							*b:match_words*
In order for matchit.vim to support a new language, you must define a suitable
pattern for |b:match_words|.  You may also want to set some of the
|matchit-configure| variables, as described above.  If your language has a
complicated syntax, or many keywords, you will need to know something about
Vim's |regular-expression|s.

The format for |b:match_words| is similar to that of the 'matchpairs' option:
it is a comma (,)-separated list of groups; each group is a colon(:)-separated
list of patterns (regular expressions).  Commas and backslashes that are part
of a pattern should be escaped with backslashes ('\:' and '\,').  It is OK to
have only one group; the effect is undefined if a group has only one pattern.
A simple example is >
	:let b:match_words = '\<if\>:\<endif\>,'
		\ . '\<while\>:\<continue\>:\<break\>:\<endwhile\>'
(In Vim regular expressions, |\<| and |\>| denote word boundaries.  Thus "if"
matches the end of "endif" but "\<if\>" does not.)  Then banging on the "%"
key will bounce the cursor between "if" and the matching "endif"; and from
"while" to any matching "continue" or "break", then to the matching "endwhile"
and back to the "while".  It is almost always easier to use |literal-string|s
(single quotes) as above:  '\<if\>' rather than "\\<if\\>" and so on.

Exception:  If the ":" character does not appear in b:match_words,