From 11c92be8974f04ab12ff3f9cd89a692bbd6c46d9 Mon Sep 17 00:00:00 2001
From: Ken Takata <kentkt@csc.jp>
Date: Wed, 14 Aug 2024 21:56:42 +0200
Subject: [PATCH] runtime(dosbatch): Add syn-sync to syntax file

Closing parentheses were often highlighted as errors.
Add a syntax sync command to reduce the error.

Also fix that `defined` was not highlighted as an operator inside
parentheses.  E.g.:
```
if defined foo (
    if defined bar (
        ...
    )
)
```
The first `defined` was highlighted but the second one was not.

related: #15453

Signed-off-by: Ken Takata <kentkt@csc.jp>
Signed-off-by: Christian Brabandt <cb@256bit.org>
---
 runtime/syntax/dosbatch.vim | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/runtime/syntax/dosbatch.vim b/runtime/syntax/dosbatch.vim
index 55601996ad..761fac0dc2 100644
--- a/runtime/syntax/dosbatch.vim
+++ b/runtime/syntax/dosbatch.vim
@@ -3,6 +3,7 @@
 " Maintainer:	Mike Williams <mrmrdubya@gmail.com>
 " Filenames:    *.bat
 " Last Change:	3rd February 2024
+" 2024 Aug 14 by Vim Project: improve syntax (#15453)
 "
 " Options Flags:
 " dosbatch_cmdextversion	- 1 = Windows NT, 2 = Windows 2000 [default]
@@ -45,7 +46,7 @@ syn match dosbatchString	"\<echo\([^)>|]\|\^\@<=[)>|]\)*"lc=4 contains=dosbatchV
 syn match dosbatchEchoOperator  "\<echo\s\+\(on\|off\)\s*$"lc=4
 
 " For embedded commands
-syn match dosbatchCmd		"(\s*'[^']*'"lc=1 contains=dosbatchString,dosbatchVariable,dosBatchArgument,@dosbatchNumber,dosbatchImplicit,dosbatchStatement,dosbatchConditional,dosbatchRepeat,dosbatchOperator
+syn match dosbatchCmd		"(\s*'[^']*'"lc=1 contains=dosbatchString,dosbatchVariable,dosBatchArgument,@dosbatchNumber,dosbatchImplicit,dosbatchStatement,dosbatchConditional,dosbatchRepeat,dosbatchOperator,dosbatchIfOperator
 
 " Numbers - surround with ws to not include in dir and filenames
 syn match dosbatchInteger       "[[:space:]=(/:,!~-]\d\+"lc=1
@@ -102,9 +103,11 @@ else
   syn match dosbatchColonCommentErr contained "\s*:\s*:.*$"
 endif
 syn match dosbatchColonCommentErr contained "\s*:\s*:[^)]*\(\(\n\s*\)\?)\)\@="
-syn region dosbatchCodeBlock	transparent start=+(+ end=+)+ contains=dosbatchString,dosbatchVariable,dosBatchArgument,@dosbatchNumber,dosbatchImplicit,dosbatchStatement,dosbatchConditional,dosbatchRepeat,dosbatchOperator,@dosbatchCodeBlockComment,dosbatchColonCommentErr,dosbatchCodeBlock
+syn region dosbatchCodeBlock	transparent start=+(+ end=+)+ contains=dosbatchString,dosbatchVariable,dosBatchArgument,@dosbatchNumber,dosbatchImplicit,dosbatchStatement,dosbatchConditional,dosbatchRepeat,dosbatchOperator,dosbatchIfOperator,@dosbatchCodeBlockComment,dosbatchColonCommentErr,dosbatchCodeBlock
 syn match dosbatchCodeBlockErr	")"
 
+syn sync match dosbatchSyncCodeBlock grouphere NONE "^)\s*$"
+
 syn keyword dosbatchImplicit    append assoc at attrib break cacls cd chcp chdir
 syn keyword dosbatchImplicit    chkdsk chkntfs cls cmd color comp compact convert copy
 syn keyword dosbatchImplicit    date del dir diskcomp diskcopy doskey echo endlocal