Commit: runtime(vim): Update base syntax, match Vim9 :unlet command

[Christian Brabandt]

runtime(vim): Update base syntax, match Vim9 :unlet command

Commit: https://github.com/vim/vim/commit/2e4c98b6f3db7d8e43645ccdf0b293cb07507ee1
Author: Doug Kearns <dougk...@gmail.com>
Date: Sun Feb 1 15:03:46 2026 +0000

runtime(vim): Update base syntax, match Vim9 :unlet command

closes: https://github.com/vim/vim/issues/19290

Signed-off-by: Doug Kearns <dougk...@gmail.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/runtime/syntax/generator/vim.vim.base b/runtime/syntax/generator/vim.vim.base
index afde79fbb..0a4da554a 100644
--- a/runtime/syntax/generator/vim.vim.base
+++ b/runtime/syntax/generator/vim.vim.base
@@ -2,7 +2,7 @@
" Language: Vim script
" Maintainer: Hirohito Higashi <h.east.727 ATMARK gmail.com>
" Doug Kearns <dougk...@gmail.com>
-" Last Change: 2026 Jan 11
+" Last Change: 2026 Jan 30
" Former Maintainer: Charles E. Campbell

" DO NOT CHANGE DIRECTLY.
@@ -1167,11 +1167,11 @@ syn region vimLetVarSubscript contained
\ skipwhite nextgroup=vimLetVarSubscript,vimLetHeredoc
\ contains=@vimExprList

-VimL syn keyword vimUnlet unl[et] skipwhite nextgroup=vimUnletBang,vimUnletVars
+syn keyword vimUnlet unl[et] skipwhite nextgroup=vimUnletBang,vimUnletVars
syn match vimUnletBang contained " \@1<=!" skipwhite nextgroup=vimUnletVars
syn region vimUnletVars contained
- \ start="$\I\|\h" skip=+
\s*\%(\\|"\ \)\|^\s*"\ + end="$" end="\ze[|"]"
- \ nextgroup=vimCmdSep,vimComment
+ \ start="$\I\|\h" skip=+
\s*\%(\\|["#]\ \)\|^\s*["#]\ + end="$" end=+\ze\s*[|"#]+
+ \ skipwhite nextgroup=vimCmdSep,vimComment,vim9Comment
\ contains=@vimContinue,vimEnvvar,vimVar,vimVimVar

" TODO: type error after register or environment variables (strings)
diff --git a/runtime/syntax/testdir/dumps/vim9_variables_02.dump b/runtime/syntax/testdir/dumps/vim9_variables_02.dump
index ee7035ed8..1c315aee2 100644
--- a/runtime/syntax/testdir/dumps/vim9_variables_02.dump
+++ b/runtime/syntax/testdir/dumps/vim9_variables_02.dump
@@ -17,4 +17,4 @@
|E+0#e000e06&|N|D| +0#0000000&@71
@75
|#+0#0000e05&| |T|y|p|e|d| |d|e|c|l|a|r|a|t|i|o|n|s| +0#0000000&@54
-@57|3|7|,|1| @9|1|4|%|
+@57|3|7|,|1| @9|1|2|%|
diff --git a/runtime/syntax/testdir/dumps/vim9_variables_03.dump b/runtime/syntax/testdir/dumps/vim9_variables_03.dump
index d390975f5..bb0a3660b 100644
--- a/runtime/syntax/testdir/dumps/vim9_variables_03.dump
+++ b/runtime/syntax/testdir/dumps/vim9_variables_03.dump
@@ -17,4 +17,4 @@
@6|\+0#e000e06&|>+0#00e0003&| +0#0000000&@66
@75
|#+0#0000e05&| |A|s@1|i|g|n|m|e|n|t|s| +0#0000000&@61
-@57|5@1|,|1| @9|2@1|%|
+@57|5@1|,|1| @9|1|9|%|
diff --git a/runtime/syntax/testdir/dumps/vim9_variables_04.dump b/runtime/syntax/testdir/dumps/vim9_variables_04.dump
index a519e7eb5..09eecdfa6 100644
--- a/runtime/syntax/testdir/dumps/vim9_variables_04.dump
+++ b/runtime/syntax/testdir/dumps/vim9_variables_04.dump
@@ -17,4 +17,4 @@
|f+0#00e0e07&|o@1| +0#0000000&|*+0#af5f00255&|=| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&@63
|f+0#00e0e07&|o@1| +0#0000000&|/+0#af5f00255&|=| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&@63
|f+0#00e0e07&|o@1| +0#0000000&|%+0#af5f00255&|=| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&@63
-@57|7|3|,|0|-|1| @7|3|0|%|
+@57|7|3|,|0|-|1| @7|2|6|%|
diff --git a/runtime/syntax/testdir/dumps/vim9_variables_05.dump b/runtime/syntax/testdir/dumps/vim9_variables_05.dump
index ce50a1a91..53f4fe1dd 100644
--- a/runtime/syntax/testdir/dumps/vim9_variables_05.dump
+++ b/runtime/syntax/testdir/dumps/vim9_variables_05.dump
@@ -17,4 +17,4 @@
|w+0#00e0e07&|:|f|o@1| +0#0000000&|-+0#af5f00255&|=| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&@61
@75
|b+0#00e0e07&|:|f|o@1| +0#0000000&|*+0#af5f00255&|=| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&@61
-@57|9|1|,|1| @9|3|8|%|
+@57|9|1|,|1| @9|3|4|%|
diff --git a/runtime/syntax/testdir/dumps/vim9_variables_06.dump b/runtime/syntax/testdir/dumps/vim9_variables_06.dump
index 760852e29..898f64284 100644
--- a/runtime/syntax/testdir/dumps/vim9_variables_06.dump
+++ b/runtime/syntax/testdir/dumps/vim9_variables_06.dump
@@ -17,4 +17,4 @@
|g+0#00e0e07&|:|f|o@1| +0#0000000&|.+0#af5f00255&@1|=| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&@60
|t+0#00e0e07&|:|f|o@1| +0#0000000&|.+0#af5f00255&@1|=| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&@60
|w+0#00e0e07&|:|f|o@1| +0#0000000&|.+0#af5f00255&@1|=| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&@60
-@57|1|0|9|,|1| @8|4|6|%|
+@57|1|0|9|,|1| @8|4|1|%|
diff --git a/runtime/syntax/testdir/dumps/vim9_variables_07.dump b/runtime/syntax/testdir/dumps/vim9_variables_07.dump
index 9b324b42d..f0aadcbbd 100644
--- a/runtime/syntax/testdir/dumps/vim9_variables_07.dump
+++ b/runtime/syntax/testdir/dumps/vim9_variables_07.dump
@@ -17,4 +17,4 @@
@75
|&+0#00e0e07&|l|:|a|l|e|p|h| +0#0000000&|=+0#af5f00255&| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&@59
@75
-@57|1|2|7|,|1| @8|5|4|%|
+@57|1|2|7|,|1| @8|4|8|%|
diff --git a/runtime/syntax/testdir/dumps/vim9_variables_08.dump b/runtime/syntax/testdir/dumps/vim9_variables_08.dump
index 55d9050e4..cb8f53f0d 100644
--- a/runtime/syntax/testdir/dumps/vim9_variables_08.dump
+++ b/runtime/syntax/testdir/dumps/vim9_variables_08.dump
@@ -17,4 +17,4 @@
@6|\| |v+0#00e0e07&|:|f|a|l|s|e|]+0#0000000&| |=+0#af5f00255&| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&@51
|[|&+0#00e0e07&|a|r|i|,+0#0000000&| |&+0#00e0e07&|b|k|c|]+0#0000000&| |=+0#af5f00255&| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&@55
|[|&+0#00e0e07&|a|r|i|,+0#0000000&| @68
-@57|1|4|5|,|1| @8|6|2|%|
+@57|1|4|5|,|1| @8|5@1|%|
diff --git a/runtime/syntax/testdir/dumps/vim9_variables_09.dump b/runtime/syntax/testdir/dumps/vim9_variables_09.dump
index 48273c051..9515d5244 100644
--- a/runtime/syntax/testdir/dumps/vim9_variables_09.dump
+++ b/runtime/syntax/testdir/dumps/vim9_variables_09.dump
@@ -17,4 +17,4 @@
|[|f+0#00e0e07&|o@1|,+0#0000000&| |b+0#00e0e07&|a|r|;+0#0000000&| |b+0#00e0e07&|a|z|]+0#0000000&| |=+0#af5f00255&| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&@52
|[|f+0#00e0e07&|o@1|,+0#0000000&| @69
@6|\| |b+0#00e0e07&|a|r|;+0#0000000&| @62
-@57|1|6|3|,|1| @8|7|1|%|
+@57|1|6|3|,|1| @8|6|2|%|
diff --git a/runtime/syntax/testdir/dumps/vim9_variables_10.dump b/runtime/syntax/testdir/dumps/vim9_variables_10.dump
index baf1f9e4f..10f79433d 100644
--- a/runtime/syntax/testdir/dumps/vim9_variables_10.dump
+++ b/runtime/syntax/testdir/dumps/vim9_variables_10.dump
@@ -17,4 +17,4 @@
@6|\| |@+0#e000e06&|b|;+0#0000000&| @63
@6|\| |@+0#e000e06&|c|]+0#0000000&| |=+0#af5f00255&| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&@56
@75
-@57|1|8|1|,|7| @8|7|9|%|
+@57|1|8|1|,|7| @8|7|0|%|
diff --git a/runtime/syntax/testdir/dumps/vim9_variables_11.dump b/runtime/syntax/testdir/dumps/vim9_variables_11.dump
index 234b3dd51..ebaabb82e 100644
--- a/runtime/syntax/testdir/dumps/vim9_variables_11.dump
+++ b/runtime/syntax/testdir/dumps/vim9_variables_11.dump
@@ -15,6 +15,6 @@
|.+0#e000002&@2| +0#0000000&@71
|E+0#e000e06&|N|D| +0#0000000&@71
@75
-|#+0#0000e05&| |:|f|o|r| +0#0000000&@68
+|#+0#0000e05&| |:|u|n|l|e|t| +0#0000000&@66
@75
-@57|1|9@1|,|1| @8|8|7|%|
+@57|1|9@1|,|1| @8|7@1|%|
diff --git a/runtime/syntax/testdir/dumps/vim9_variables_12.dump b/runtime/syntax/testdir/dumps/vim9_variables_12.dump
index 7a6baece8..642e30b2c 100644
--- a/runtime/syntax/testdir/dumps/vim9_variables_12.dump
+++ b/runtime/syntax/testdir/dumps/vim9_variables_12.dump
@@ -1,20 +1,20 @@
| +0&#ffffff0@74
-|f+0#af5f00255&|o|r| +0#0000000&|f+0#00e0e07&|o@1| +0#0000000&|i+0#af5f00255&|n| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&@59
-|e+0#af5f00255&|n|d|f|o|r| +0#0000000&@68
+|u+0#af5f00255&|n|l|e|t| +0#0000000&|f+0#00e0e07&|o@1| +0#0000000&@65
+|u+0#af5f00255&|n|l|e|t| +0#0000000&|f+0#00e0e07&|o@1| +0#0000000&|b+0#00e0e07&|a|r| +0#0000000&@61
+|u+0#af5f00255&|n|l|e|t| +0#0000000&|f+0#00e0e07&|o@1| +0#0000000&@65
+@6|#+0#0000e05&|\| |c|o|m@1|e|n|t| +0#0000000&@58
+@6>\+0#e000e06&| +0#0000000&|b+0#00e0e07&|a|r| +0#0000000&@63
@75
-|f+0#af5f00255&|o|r| +0#0000000&|[|f+0#00e0e07&|o@1|,+0#0000000&| |b+0#00e0e07&|a|r|]+0#0000000&| |i+0#af5f00255&|n| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&@52
->e+0#af5f00255&|n|d|f|o|r| +0#0000000&@68
+|u+0#af5f00255&|n|l|e|t|!| +0#0000000&|f+0#00e0e07&|o@1| +0#0000000&@64
+|u+0#af5f00255&|n|l|e|t|!| +0#0000000&|f+0#00e0e07&|o@1| +0#0000000&|b+0#00e0e07&|a|r| +0#0000000&@60
+|u+0#af5f00255&|n|l|e|t|!| +0#0000000&|f+0#00e0e07&|o@1| +0#0000000&@64
+@6|#+0#0000e05&|\| |c|o|m@1|e|n|t| +0#0000000&@58
+@6|\+0#e000e06&| +0#0000000&|b+0#00e0e07&|a|r| +0#0000000&@63
@75
-|#+0#0000e05&| |S|c|o|p|e| |d|i|c|t|i|o|n|a|r|i|e|s| +0#0000000&@54
+|u+0#af5f00255&|n|l|e|t| +0#0000000&|$+0#e000e06&|F|O@1| +0#0000000&@64
+|u+0#af5f00255&|n|l|e|t|!| +0#0000000&|$+0#e000e06&|F|O@1| +0#0000000&@63
@75
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-|e+0#af5f00255&|c|h|o| +0#0000000&|g+0#00e0e07&|e|t|(+0#e000e06&|w+0#00e0e07&|:|,+0#0000000&| |'+0#e000002&|f|o@1|'|,+0#0000000&| |4+0#e000002&|2|)+0#e000e06&| +0#0000000&@51
-|e+0#af5f00255&|c|h|o| +0#0000000&|g+0#00e0e07&|e|t|(+0#e000e06&|t+0#00e0e07&|:|,+0#0000000&| |'+0#e000002&|f|o@1|'|,+0#0000000&| |4+0#e000002&|2|)+0#e000e06&| +0#0000000&@51
-|e+0#af5f00255&|c|h|o| +0#0000000&|g+0#00e0e07&|e|t|(+0#e000e06&|g+0#00e0e07&|:|,+0#0000000&| |'+0#e000002&|f|o@1|'|,+0#0000000&| |4+0#e000002&|2|)+0#e000e06&| +0#0000000&@51
-|e+0#af5f00255&|c|h|o| +0#0000000&|g+0#00e0e07&|e|t|(+0#e000e06&|v+0#00e0e07&|:|,+0#0000000&| |'+0#e000002&|f|o@1|'|,+0#0000000&| |4+0#e000002&|2|)+0#e000e06&| +0#0000000&@51
-@75
-|f+0#af5f00255&|o|r| +0#0000000&|k+0#00e0e07&| +0#0000000&|i+0#af5f00255&|n| +0#0000000&|k+0#00e0e07&|e|y|s|(+0#e000e06&|b+0#00e0e07&|:|)+0#e000e06&| +0#0000000&||| |e+0#af5f00255&|c|h|o| +0#0000000&|b+0#00e0e07&|:|[+0#0000000&|k+0#00e0e07&|]+0#0000000&| ||| |e+0#af5f00255&|n|d|f|o|r| +0#0000000&@35
-|f+0#af5f00255&|o|r| +0#0000000&|k+0#00e0e07&| +0#0000000&|i+0#af5f00255&|n| +0#0000000&|k+0#00e0e07&|e|y|s|(+0#e000e06&|w+0#00e0e07&|:|)+0#e000e06&| +0#0000000&||| |e+0#af5f00255&|c|h|o| +0#0000000&|w+0#00e0e07&|:|[+0#0000000&|k+0#00e0e07&|]+0#0000000&| ||| |e+0#af5f00255&|n|d|f|o|r| +0#0000000&@35
-|f+0#af5f00255&|o|r| +0#0000000&|k+0#00e0e07&| +0#0000000&|i+0#af5f00255&|n| +0#0000000&|k+0#00e0e07&|e|y|s|(+0#e000e06&|t+0#00e0e07&|:|)+0#e000e06&| +0#0000000&||| |e+0#af5f00255&|c|h|o| +0#0000000&|t+0#00e0e07&|:|[+0#0000000&|k+0#00e0e07&|]+0#0000000&| ||| |e+0#af5f00255&|n|d|f|o|r| +0#0000000&@35
-|f+0#af5f00255&|o|r| +0#0000000&|k+0#00e0e07&| +0#0000000&|i+0#af5f00255&|n| +0#0000000&|k+0#00e0e07&|e|y|s|(+0#e000e06&|g+0#00e0e07&|:|)+0#e000e06&| +0#0000000&||| |e+0#af5f00255&|c|h|o| +0#0000000&|g+0#00e0e07&|:|[+0#0000000&|k+0#00e0e07&|]+0#0000000&| ||| |e+0#af5f00255&|n|d|f|o|r| +0#0000000&@35
-@57|2|1|7|,|1| @8|9|5|%|
+|u+0#af5f00255&|n|l|e|t| +0#0000000&|l+0#00e0e07&|i|s|t|[+0#0000000&|3+0#e000002&|]+0#0000000&| @61
+|u+0#af5f00255&|n|l|e|t| +0#0000000&|l+0#00e0e07&|i|s|t|[+0#0000000&|3+0#e000002&|:+0#0000000&|]| @60
+|u+0#af5f00255&|n|l|e|t| +0#0000000&|d+0#00e0e07&|i|c|t|[+0#0000000&|'+0#e000002&|t|w|o|'|]+0#0000000&| @57
+@57|2|1|7|,|7| @8|8|4|%|
diff --git a/runtime/syntax/testdir/dumps/vim9_variables_13.dump b/runtime/syntax/testdir/dumps/vim9_variables_13.dump
index 851fa0792..638d2b608 100644
--- a/runtime/syntax/testdir/dumps/vim9_variables_13.dump
+++ b/runtime/syntax/testdir/dumps/vim9_variables_13.dump
@@ -1,20 +1,20 @@
-|f+0#af5f00255#ffffff0|o|r| +0#0000000&|k+0#00e0e07&| +0#0000000&|i+0#af5f00255&|n| +0#0000000&|k+0#00e0e07&|e|y|s|(+0#e000e06&|g+0#00e0e07&|:|)+0#e000e06&| +0#0000000&||| |e+0#af5f00255&|c|h|o| +0#0000000&|g+0#00e0e07&|:|[+0#0000000&|k+0#00e0e07&|]+0#0000000&| ||| |e+0#af5f00255&|n|d|f|o|r| +0#0000000&@35
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+|u+0#af5f00255#ffffff0|n|l|e|t| +0#0000000&|d+0#00e0e07&|i|c|t|[+0#0000000&|'+0#e000002&|t|w|o|'|]+0#0000000&| @57
+|u+0#af5f00255&|n|l|e|t| +0#0000000&|d+0#00e0e07&|i|c|t|.+0#0000000&|t+0#00e0e07&|w|o| +0#0000000&@60
@75
-|#+0#0000e05&| |N|e|o|v|i|m|-|s|p|e|c|i|f|i|c| |v|a|r|i|a|b|l|e|s| |(|n|o|t| |h|i|g|h|l|i|g|h|t|e|d| |b|y| |d|e|f|a|u|l|t|)| +0#0000000&@18
+|u+0#af5f00255&|n|l|e|t| +0#0000000&|f+0#00e0e07&|o@1| +0#0000000&|#+0#0000e05&| |c|o|m@1|e|n|t| +0#0000000&@55
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+>u+0#af5f00255&|n|l|e|t| +0#0000000&|f+0#00e0e07&|o@1| +0#0000000&||| |e+0#af5f00255&|c|h|o| +0#0000000&|"+0#e000002&|F|o@1|"| +0#0000000&@52
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@75
->e+0#af5f00255&|c|h|o| +0#0000000&|v+0#00e0e07&|:|l+0#0000000&|u|a| |v+0#00e0e07&|:|m+0#0000000&|s|g|p|a|c|k|_|t|y|p|e|s| |v+0#00e0e07&|:|r+0#0000000&|e|l|n|u|m| |v+0#00e0e07&|:|s+0#0000000&|t|d|e|r@1| |v+0#00e0e07&|:|t+0#0000000&|e|r|m|r|e|q|u|e|s|t| |v+0#00e0e07&|:|v+0#0000000&|i|r|t|n|u|m| @6
+|#+0#0000e05&| |:|f|o|r| +0#0000000&@68
@75
-|e+0#af5f00255&|c|h|o| +0#0000000&|&+0#00e0e07&|c+0#0000000&|h|a|n@1|e|l| |&+0#00e0e07&|i+0#0000000&|n|c@1|o|m@1|a|n|d| |&+0#00e0e07&|m+0#0000000&|o|u|s|e|s|c|r|o|l@1| |&+0#00e0e07&|p+0#0000000&|u|m|b|l|e|n|d| |&+0#00e0e07&|r+0#0000000&|e|d|r|a|w|d|e|b|u|g| |&+0#00e0e07&|s+0#0000000&|c|r|o|l@1|b|a|c|k| @1
-|e+0#af5f00255&|c|h|o| +0#0000000&|&+0#00e0e07&|s+0#0000000&|h|a|d|a| |&+0#00e0e07&|s+0#0000000&|h|a|d|a|f|i|l|e| |&+0#00e0e07&|s+0#0000000&|t|a|t|u|s|c|o|l|u|m|n| |&+0#00e0e07&|t+0#0000000&|e|r|m|p|a|s|t|e|f|i|l|t|e|r| |&+0#00e0e07&|t+0#0000000&|e|r|m|s|y|n|c| |&+0#00e0e07&|w+0#0000000&|i|n|b|a|r| @3
-|e+0#af5f00255&|c|h|o| +0#0000000&|&+0#00e0e07&|w+0#0000000&|i|n|b|l|e|n|d| |&+0#00e0e07&|w+0#0000000&|i|n|h|i|g|h|l|i|g|h|t| @46
+|f+0#af5f00255&|o|r| +0#0000000&|f+0#00e0e07&|o@1| +0#0000000&|i+0#af5f00255&|n| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&@59
+|e+0#af5f00255&|n|d|f|o|r| +0#0000000&@68
@75
-|~+0#4040ff13&| @73
-|~| @73
-|~| @73
-|~| @73
-|~| @73
-|~| @73
-|~| @73
-|~| @73
-| +0#0000000&@56|2|3|5|,|1| @8|B|o|t|
+|f+0#af5f00255&|o|r| +0#0000000&|[|f+0#00e0e07&|o@1|,+0#0000000&| |b+0#00e0e07&|a|r|]+0#0000000&| |i+0#af5f00255&|n| +0#0000000&|e+0#00e0e07&|x|p|r| +0#0000000&@52
+|e+0#af5f00255&|n|d|f|o|r| +0#0000000&@68
+@75
+|#+0#0000e05&| |S|c|o|p|e| |d|i|c|t|i|o|n|a|r|i|e|s| +0#0000000&@54
+@57|2|3|5|,|1| @8|9|1|%|
diff --git a/runtime/syntax/testdir/dumps/vim9_variables_14.dump b/runtime/syntax/testdir/dumps/vim9_variables_14.dump
new file mode 100644
index 000000000..afe83a8d7
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/vim9_variables_14.dump
@@ -0,0 +1,20 @@
+|#+0#0000e05#ffffff0| |S|c|o|p|e| |d|i|c|t|i|o|n|a|r|i|e|s| +0#0000000&@54
+@75
+|e+0#af5f00255&|c|h|o| +0#0000000&|g+0#00e0e07&|e|t|(+0#e000e06&|b+0#00e0e07&|:|,+0#0000000&| |'+0#e000002&|f|o@1|'|,+0#0000000&| |4+0#e000002&|2|)+0#e000e06&| +0#0000000&@51
+|e+0#af5f00255&|c|h|o| +0#0000000&|g+0#00e0e07&|e|t|(+0#e000e06&|w+0#00e0e07&|:|,+0#0000000&| |'+0#e000002&|f|o@1|'|,+0#0000000&| |4+0#e000002&|2|)+0#e000e06&| +0#0000000&@51
+|e+0#af5f00255&|c|h|o| +0#0000000&|g+0#00e0e07&|e|t|(+0#e000e06&|t+0#00e0e07&|:|,+0#0000000&| |'+0#e000002&|f|o@1|'|,+0#0000000&| |4+0#e000002&|2|)+0#e000e06&| +0#0000000&@51
+>e+0#af5f00255&|c|h|o| +0#0000000&|g+0#00e0e07&|e|t|(+0#e000e06&|g+0#00e0e07&|:|,+0#0000000&| |'+0#e000002&|f|o@1|'|,+0#0000000&| |4+0#e000002&|2|)+0#e000e06&| +0#0000000&@51
+|e+0#af5f00255&|c|h|o| +0#0000000&|g+0#00e0e07&|e|t|(+0#e000e06&|v+0#00e0e07&|:|,+0#0000000&| |'+0#e000002&|f|o@1|'|,+0#0000000&| |4+0#e000002&|2|)+0#e000e06&| +0#0000000&@51
+@75
+|f+0#af5f00255&|o|r| +0#0000000&|k+0#00e0e07&| +0#0000000&|i+0#af5f00255&|n| +0#0000000&|k+0#00e0e07&|e|y|s|(+0#e000e06&|b+0#00e0e07&|:|)+0#e000e06&| +0#0000000&||| |e+0#af5f00255&|c|h|o| +0#0000000&|b+0#00e0e07&|:|[+0#0000000&|k+0#00e0e07&|]+0#0000000&| ||| |e+0#af5f00255&|n|d|f|o|r| +0#0000000&@35
+|f+0#af5f00255&|o|r| +0#0000000&|k+0#00e0e07&| +0#0000000&|i+0#af5f00255&|n| +0#0000000&|k+0#00e0e07&|e|y|s|(+0#e000e06&|w+0#00e0e07&|:|)+0#e000e06&| +0#0000000&||| |e+0#af5f00255&|c|h|o| +0#0000000&|w+0#00e0e07&|:|[+0#0000000&|k+0#00e0e07&|]+0#0000000&| ||| |e+0#af5f00255&|n|d|f|o|r| +0#0000000&@35
+|f+0#af5f00255&|o|r| +0#0000000&|k+0#00e0e07&| +0#0000000&|i+0#af5f00255&|n| +0#0000000&|k+0#00e0e07&|e|y|s|(+0#e000e06&|t+0#00e0e07&|:|)+0#e000e06&| +0#0000000&||| |e+0#af5f00255&|c|h|o| +0#0000000&|t+0#00e0e07&|:|[+0#0000000&|k+0#00e0e07&|]+0#0000000&| ||| |e+0#af5f00255&|n|d|f|o|r| +0#0000000&@35
+|f+0#af5f00255&|o|r| +0#0000000&|k+0#00e0e07&| +0#0000000&|i+0#af5f00255&|n| +0#0000000&|k+0#00e0e07&|e|y|s|(+0#e000e06&|g+0#00e0e07&|:|)+0#e000e06&| +0#0000000&||| |e+0#af5f00255&|c|h|o| +0#0000000&|g+0#00e0e07&|:|[+0#0000000&|k+0#00e0e07&|]+0#0000000&| ||| |e+0#af5f00255&|n|d|f|o|r| +0#0000000&@35
+|f+0#af5f00255&|o|r| +0#0000000&|k+0#00e0e07&| +0#0000000&|i+0#af5f00255&|n| +0#0000000&|k+0#00e0e07&|e|y|s|(+0#e000e06&|v+0#00e0e07&|:|)+0#e000e06&| +0#0000000&||| |e+0#af5f00255&|c|h|o| +0#0000000&|v+0#00e0e07&|:|[+0#0000000&|k+0#00e0e07&|]+0#0000000&| ||| |e+0#af5f00255&|n|d|f|o|r| +0#0000000&@35
+@75
+|#+0#0000e05&| |N|e|o|v|i|m|-|s|p|e|c|i|f|i|c| |v|a|r|i|a|b|l|e|s| |(|n|o|t| |h|i|g|h|l|i|g|h|t|e|d| |b|y| |d|e|f|a|u|l|t|)| +0#0000000&@18
+@75
+|e+0#af5f00255&|c|h|o| +0#0000000&|v+0#00e0e07&|:|l+0#0000000&|u|a| |v+0#00e0e07&|:|m+0#0000000&|s|g|p|a|c|k|_|t|y|p|e|s| |v+0#00e0e07&|:|r+0#0000000&|e|l|n|u|m| |v+0#00e0e07&|:|s+0#0000000&|t|d|e|r@1| |v+0#00e0e07&|:|t+0#0000000&|e|r|m|r|e|q|u|e|s|t| |v+0#00e0e07&|:|v+0#0000000&|i|r|t|n|u|m| @6
+@75
+|e+0#af5f00255&|c|h|o| +0#0000000&|&+0#00e0e07&|c+0#0000000&|h|a|n@1|e|l| |&+0#00e0e07&|i+0#0000000&|n|c@1|o|m@1|a|n|d| |&+0#00e0e07&|m+0#0000000&|o|u|s|e|s|c|r|o|l@1| |&+0#00e0e07&|p+0#0000000&|u|m|b|l|e|n|d| |&+0#00e0e07&|r+0#0000000&|e|d|r|a|w|d|e|b|u|g| |&+0#00e0e07&|s+0#0000000&|c|r|o|l@1|b|a|c|k| @1
+@57|2|5|3|,|1| @8|9|8|%|
diff --git a/runtime/syntax/testdir/dumps/vim9_variables_15.dump b/runtime/syntax/testdir/dumps/vim9_variables_15.dump
new file mode 100644
index 000000000..095bdb0fd
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/vim9_variables_15.dump
@@ -0,0 +1,20 @@
+|e+0#af5f00255#ffffff0|c|h|o| +0#0000000&|&+0#00e0e07&|c+0#0000000&|h|a|n@1|e|l| |&+0#00e0e07&|i+0#0000000&|n|c@1|o|m@1|a|n|d| |&+0#00e0e07&|m+0#0000000&|o|u|s|e|s|c|r|o|l@1| |&+0#00e0e07&|p+0#0000000&|u|m|b|l|e|n|d| |&+0#00e0e07&|r+0#0000000&|e|d|r|a|w|d|e|b|u|g| |&+0#00e0e07&|s+0#0000000&|c|r|o|l@1|b|a|c|k| @1
+|e+0#af5f00255&|c|h|o| +0#0000000&|&+0#00e0e07&|s+0#0000000&|h|a|d|a| |&+0#00e0e07&|s+0#0000000&|h|a|d|a|f|i|l|e| |&+0#00e0e07&|s+0#0000000&|t|a|t|u|s|c|o|l|u|m|n| |&+0#00e0e07&|t+0#0000000&|e|r|m|p|a|s|t|e|f|i|l|t|e|r| |&+0#00e0e07&|t+0#0000000&|e|r|m|s|y|n|c| |&+0#00e0e07&|w+0#0000000&|i|n|b|a|r| @3
+|e+0#af5f00255&|c|h|o| +0#0000000&|&+0#00e0e07&|w+0#0000000&|i|n|b|l|e|n|d| |&+0#00e0e07&|w+0#0000000&|i|n|h|i|g|h|l|i|g|h|t| @46
+> @74
+|~+0#4040ff13&| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+| +0#0000000&@56|2|6|9|,|0|-|1| @6|B|o|t|
diff --git a/runtime/syntax/testdir/input/vim9_variables.vim b/runtime/syntax/testdir/input/vim9_variables.vim
index 8347bd7ee..7344db8ce 100644
--- a/runtime/syntax/testdir/input/vim9_variables.vim
+++ b/runtime/syntax/testdir/input/vim9_variables.vim
@@ -208,6 +208,35 @@ foo =<< eval trim END
...
END

+# :unlet
+
+unlet foo
+unlet foo bar
+unlet foo
+ #\ comment
+ \ bar
+
+unlet! foo
+unlet! foo bar
+unlet! foo
+ #\ comment
+ \ bar
+
+unlet $FOO
+unlet! $FOO
+
+unlet list[3]
+unlet list[3:]
+unlet dict['two']
+unlet dict.two
+
+unlet foo # comment
+unlet foo #\ comment
+unlet foo | echo "Foo"
+unlet foo bar # comment
+unlet foo bar #\ comment
+unlet foo bar | echo "Foo"
+
# :for

for foo in expr
diff --git a/runtime/syntax/vim.vim b/runtime/syntax/vim.vim
index 03f466c46..22f563faf 100644
--- a/runtime/syntax/vim.vim
+++ b/runtime/syntax/vim.vim
@@ -2,7 +2,7 @@
" Language: Vim script
" Maintainer: Hirohito Higashi <h.east.727 ATMARK gmail.com>
" Doug Kearns <dougk...@gmail.com>
-" Last Change: 2026 Jan 11
+" Last Change: 2026 Jan 30
" Former Maintainer: Charles E. Campbell

" DO NOT CHANGE DIRECTLY.
@@ -1224,11 +1224,11 @@ syn region vimLetVarSubscript contained
\ skipwhite nextgroup=vimLetVarSubscript,vimLetHeredoc
\ contains=@vimExprList

-VimL syn keyword vimUnlet unl[et] skipwhite nextgroup=vimUnletBang,vimUnletVars
+syn keyword vimUnlet unl[et] skipwhite nextgroup=vimUnletBang,vimUnletVars
syn match vimUnletBang contained " \@1<=!" skipwhite nextgroup=vimUnletVars
syn region vimUnletVars contained
- \ start="$\I\|\h" skip=+
\s*\%(\\|"\ \)\|^\s*"\ + end="$" end="\ze[|"]"
- \ nextgroup=vimCmdSep,vimComment
+ \ start="$\I\|\h" skip=+
\s*\%(\\|["#]\ \)\|^\s*["#]\ + end="$" end=+\ze\s*[|"#]+
+ \ skipwhite nextgroup=vimCmdSep,vimComment,vim9Comment
\ contains=@vimContinue,vimEnvvar,vimVar,vimVimVar

" TODO: type error after register or environment variables (strings)