diff --git a/runtime/syntax/generator/gen_syntax_vim.vim b/runtime/syntax/generator/gen_syntax_vim.vim
index e42897f..3a77637 100644
--- a/runtime/syntax/generator/gen_syntax_vim.vim
+++ b/runtime/syntax/generator/gen_syntax_vim.vim
@@ -1,7 +1,7 @@
 " Vim syntax file generator
 " Language:		 Vim script
 " Maintainer:  Hirohito Higashi (h_east)
-" Last Change: 2025 Jun 01
+" Last Change: 2025 Jun 11
 
 let s:keepcpo= &cpo
 set cpo&vim
@@ -265,6 +265,7 @@
 		debuggreedy
 		def
 		delcommand
+		delfunction
 		doautoall
 		doautocmd
 		echo
diff --git a/runtime/syntax/generator/vim.vim.base b/runtime/syntax/generator/vim.vim.base
index b94c5be..dbe2ab6 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 <dougkearns@gmail.com>
-" Last Change:	   2025 Jun 08
+" Last Change:	   2025 Jun 11
 " Former Maintainer: Charles E. Campbell
 
 " DO NOT CHANGE DIRECTLY.
@@ -233,7 +233,7 @@
 syn case match
 
 " All vimCommands are contained by vimIsCommand. {{{2
-syn cluster vimCmdList	contains=vimAbb,vimAddress,vimAutocmd,vimAugroup,vimBehave,vimCall,vimCatch,vimConst,vimDoautocmd,vimDebuggreedy,vimDef,vimDefFold,vimDelcommand,@vimEcho,vimElse,vimEnddef,vimEndfunction,vimEndif,vimExecute,vimIsCommand,vimExtCmd,vimExFilter,vimExMark,vimFor,vimFunction,vimFuncFold,vimGrep,vimGrepAdd,vimGlobal,vimHelpgrep,vimHighlight,vimImport,vimLet,vimLoadkeymap,vimLockvar,vimMake,vimMap,vimMark,vimMatch,vimNotFunc,vimNormal,vimProfdel,vimProfile,vimRedir,vimSet,vimSleep,vimSort,vimSyntax,vimThrow,vimUnlet,vimUnlockvar,vimUnmap,vimUserCmd,vimVimgrep,vimVimgrepadd,vimMenu,vimMenutranslate,@vim9CmdList,@vimExUserCmdList,vimLua,vimMzScheme,vimPerl,vimPython,vimPython3,vimPythonX,vimRuby,vimTcl
+syn cluster vimCmdList	contains=vimAbb,vimAddress,vimAutocmd,vimAugroup,vimBehave,vimCall,vimCatch,vimConst,vimDoautocmd,vimDebuggreedy,vimDef,vimDefFold,vimDelcommand,vimDelFunction,@vimEcho,vimElse,vimEnddef,vimEndfunction,vimEndif,vimExecute,vimIsCommand,vimExtCmd,vimExFilter,vimExMark,vimFor,vimFunction,vimFunctionFold,vimGrep,vimGrepAdd,vimGlobal,vimHelpgrep,vimHighlight,vimImport,vimLet,vimLoadkeymap,vimLockvar,vimMake,vimMap,vimMark,vimMatch,vimNotFunc,vimNormal,vimProfdel,vimProfile,vimRedir,vimSet,vimSleep,vimSort,vimSyntax,vimThrow,vimUnlet,vimUnlockvar,vimUnmap,vimUserCmd,vimVimgrep,vimVimgrepadd,vimMenu,vimMenutranslate,@vim9CmdList,@vimExUserCmdList,vimLua,vimMzScheme,vimPerl,vimPython,vimPython3,vimPythonX,vimRuby,vimTcl
 syn cluster vim9CmdList	contains=vim9Abstract,vim9Class,vim9Const,vim9Enum,vim9Export,vim9Final,vim9For,vim9Interface,vim9Type,vim9Var
 syn match vimCmdSep	"\\\@1<!|"	skipwhite nextgroup=@vimCmdList,vimSubst1,vimFunc
 syn match vimCmdSep	":\+"	skipwhite nextgroup=@vimCmdList,vimSubst1
@@ -424,7 +424,7 @@
       \ skip=+\n\s*\%(\\\|"\\ \)+
       \ end="}" end="$"
       \ contains=@vimContinue,@vimExprList,vimLambdaParams
-syn match	vimLambdaParams	contained	"\%({\n\=\)\@1<=\_.\{-}\%(->\)\@=" nextgroup=vimLambdaOperator contains=@vimContinue,vimFuncParam
+syn match	vimLambdaParams	contained	"\%({\n\=\)\@1<=\_.\{-}\%(->\)\@=" nextgroup=vimLambdaOperator contains=@vimContinue,vimFunctionParam
 
 syn match	vim9LambdaOperator   contained	"=>" skipwhite skipempty nextgroup=@vimExprList,vim9LambdaBlock,vim9LambdaOperatorComment
 syn match	vim9LambdaParen      contained	"[()]"
@@ -439,56 +439,98 @@
 
 " Functions: Tag is provided for those who wish to highlight tagged functions {{{2
 " =========
-syn cluster	vimFuncList	contains=vimFuncBang,vimFunctionError,vimFuncKey,vimFuncScope,vimFuncSID,Tag
-syn cluster	vimDefList	contains=vimFuncBang,vimFunctionError,vimDefKey,vimFuncScope,vimFuncSID,Tag
+syn cluster	vimFunctionBodyCommon	contains=@vimCmdList,vimCmplxRepeat,vimContinue,vimCtrlChar,vimDef,vimFBVar,vimFunc,vimFunction,vimNotFunc,vimNumber,vimOper,vimOperParen,vimRegister,vimSpecFile,vimString,vimSubst,vimFunctionFold,vimDefFold,vimCmdSep
+syn cluster	vimFunctionBodyList	contains=@vimFunctionBodyCommon,vimComment,vimLineComment,vimInsert,vimConst,vimLet,vimSearch
+syn cluster	vimDefBodyList		contains=@vimFunctionBodyCommon,vim9Comment,vim9LineComment,vim9Block,vim9Const,vim9Final,vim9Var,vim9Null,vim9Boolean,vim9For,vim9LhsVariable,vim9LhsVariableList,vim9LhsRegister,vim9Search,@vimSpecialVar
 
-syn cluster	vimFuncBodyCommon	contains=@vimCmdList,vimCmplxRepeat,vimContinue,vimCtrlChar,vimDef,vimFBVar,vimFunc,vimFunction,vimNotFunc,vimNumber,vimOper,vimOperParen,vimRegister,vimSpecFile,vimString,vimSubst,vimFuncFold,vimDefFold
-syn cluster	vimFuncBodyList	contains=@vimFuncBodyCommon,vimComment,vimLineComment,vimInsert,vimConst,vimLet,vimSearch
-syn cluster	vimDefBodyList	contains=@vimFuncBodyCommon,vim9Comment,vim9LineComment,vim9Block,vim9Const,vim9Final,vim9Var,vim9Null,vim9Boolean,vim9For,vim9LhsVariable,vim9LhsVariableList,vim9LhsRegister,vim9Search,@vimSpecialVar
-
-syn region	vimFuncPattern	contained		matchgroup=vimOper start="/" end="$" contains=@vimSubstList
-syn match	vimFunction	"\<fu\%[nction]\>"	skipwhite nextgroup=vimCmdSep,vimComment,vimFuncPattern contains=vimFuncKey
-syn match	vimDef	"\<def\>"		skipwhite nextgroup=vimCmdSep,vimComment,vimFuncPattern contains=vimDefKey
-
-syn match	vimFunction	"\<fu\%[nction]\>!\=\s*\%(<[sS][iI][dD]>\|[sg]:\)\=\%(\i\|[#.]\|{.\{-1,}}\)\+"	contains=@vimFuncList skipwhite nextgroup=vimFuncParams
-syn match	vimDef	"\<def\>!\=\s*\%(<[sS][iI][dD]>\|[sg]:\)\=\%(\i\|[#.]\|{.\{-1,}}\)\+"		contains=@vimDefList            nextgroup=vimDefParams
-
-syn region	vimFuncComment	contained
-      \ start=+".*+
-      \ skip=+\n\s*\\\|\n\s*"\\ +
+syn region	vimFunctionPattern	contained
+      \ matchgroup=vimOper
+      \ start="/"
       \ end="$"
-      \ skipwhite skipempty nextgroup=vimFuncBody,vimEndfunction
+      \ contains=@vimSubstList
+
+syn match	vimFunctionBang	contained	"\a\@1<=!"	skipwhite nextgroup=vimFunctionName
+syn match	vimDefBang	contained	"\a\@1<=!"	skipwhite nextgroup=vimDefName
+syn match	vimFunctionSID	contained	"\c<sid>"
+syn match	vimFunctionScope	contained	"\<[bwglstav]:"
+syn match	vimFunctionName	contained
+      \ "\%(<[sS][iI][dD]>\|[bwglstav]:\)\=\%([[:alnum:]_#.]\+\|{.\{-1,}}\)\+"
+      \ skipwhite nextgroup=vimFunctionParams,vimCmdSep,vimComment,vim9Comment
+      \ contains=vimFunctionError,vimFunctionScope,vimFunctionSID,Tag
+syn match	vimDefName	contained
+      \ "\%(<[sS][iI][dD]>\|[bwglstav]:\)\=\%([[:alnum:]_#.]\+\|{.\{-1,}}\)\+"
+      \ nextgroup=vimDefParams,vimCmdSep,vimComment,vim9Comment
+      \ contains=vimFunctionError,vimFunctionScope,vimFunctionSID,Tag
+
+syn match	vimFunction	"\<fu\%[nction]\>"	skipwhite nextgroup=vimFunctionBang,vimFunctionName,vimFunctionPattern,vimCmdSep,vimComment
+syn match	vimDef	"\<def\>"		skipwhite nextgroup=vimDefBang,vimDefName,vimFunctionPattern,vimCmdSep,vimComment
+
+syn region	vimFunctionComment	contained
+      \ start=+".*+
+      \ skip=+\n\s*\%(\\\|"\\ \)+
+      \ end="$"
+      \ skipwhite skipempty nextgroup=vimFunctionBody,vimEndfunction
 syn region	vimDefComment	contained
       \ start="#.*"
-      \ skip=+\n\s*\\\|\n\s*#\\ +
+      \ skip=+\n\s*\%(\\\|#\\ \)+
       \ end="$"
       \ skipwhite skipempty nextgroup=vimDefBody,vimEnddef
 
-syn match	vimFuncBang	contained	"!"
-syn match	vimFuncSID	contained	"\c<sid>"
-syn match	vimFuncScope	contained	"\<[sg]:"
-syn keyword	vimFuncKey	contained	fu[nction]
-syn keyword	vimDefKey	contained	def
+syn region	vimFunctionParams	contained
+      \ matchgroup=Delimiter
+      \ start="("
+      \ skip=+\n\s*\%(\\\|"\\ \)+
+      \ end=")"
+      \ skipwhite skipempty nextgroup=vimFunctionBody,vimFunctionComment,vimEndfunction,vimFunctionMod,vim9CommentError
+      \ contains=vimFunctionParam,vimOperParen,@vimContinue
+syn region	vimDefParams	contained
+      \ matchgroup=Delimiter
+      \ start="("
+      \ end=")"
+      \ skipwhite skipempty nextgroup=vimDefBody,vimDefComment,vimEnddef,vimReturnType,vimCommentError
+      \ contains=vimDefParam,vim9Comment,vimFunctionParamEquals,vimOperParen
+syn match	vimFunctionParam	contained	"\<\h\w*\>\|\.\.\."	skipwhite nextgroup=vimFunctionParamEquals
+syn match	vimDefParam	contained	"\<\h\w*\>"		skipwhite nextgroup=vimParamType,vimFunctionParamEquals
 
-syn region	vimFuncParams	contained	matchgroup=Delimiter start="(" skip=+\n\s*\\\|\n\s*"\\ + end=")" skipwhite skipempty nextgroup=vimFuncBody,vimFuncComment,vimEndfunction,vimFuncMod,vim9CommentError	contains=vimFuncParam,vimOperParen,@vimContinue
-syn region	vimDefParams	contained	matchgroup=Delimiter start="("		   end=")" skipwhite skipempty nextgroup=vimDefBody,vimDefComment,vimEnddef,vimReturnType,vimCommentError	contains=vimDefParam,vim9Comment,vimFuncParamEquals,vimOperParen
-syn match	vimFuncParam	contained	"\<\h\w*\>\|\.\.\."	skipwhite nextgroup=vimFuncParamEquals
-syn match	vimDefParam	contained	"\<\h\w*\>"		skipwhite nextgroup=vimParamType,vimFuncParamEquals
+syn match	vimFunctionParamEquals contained	"="			skipwhite	  nextgroup=@vimExprList
+syn match	vimFunctionMod	     contained	"\<\%(abort\|closure\|dict\|range\)\>"	skipwhite skipempty nextgroup=vimFunctionBody,vimFunctionComment,vimEndfunction,vimFunctionMod,vim9CommentError
 
-syn match	vimFuncParamEquals contained	"="			skipwhite           nextgroup=@vimExprList
-syn match	vimFuncMod	 contained	"\<\%(abort\|closure\|dict\|range\)\>"	skipwhite skipempty nextgroup=vimFuncBody,vimFuncComment,vimEndfunction,vimFuncMod,vim9CommentError
+syn region	vimFunctionBody	contained
+      \ start="^."
+      \ matchgroup=vimCommand
+      \ end="\<endfu\%[nction]\>"
+      \ skipwhite nextgroup=vimCmdSep,vimComment,vim9CommentError
+      \ contains=@vimFunctionBodyList
+syn region	vimDefBody	contained
+      \ start="^."
+      \ matchgroup=vimCommand
+      \ end="\<enddef\>"
+      \ skipwhite nextgroup=vimCmdSep,vim9Comment,vimCommentError
+      \ contains=@vimDefBodyList
 
-syn region	vimFuncBody	contained	start="^." matchgroup=vimCmdSep start="|" matchgroup=vimCommand end="\<endfu\%[nction]\>"	contains=@vimFuncBodyList skipwhite nextgroup=vimCmdSep,vimComment,vim9CommentError
-syn region	vimDefBody	contained	start="^." matchgroup=vimCmdSep start="|" matchgroup=vimCommand end="\<enddef\>"	contains=@vimDefBodyList  skipwhite nextgroup=vimCmdSep,vim9Comment,vimCommentError
-
-syn match	vimEndfunction	"\<endf\%[unction]\>" skipwhite nextgroup=vimCmdSep,vimComment,vim9CommentError
-syn match	vimEnddef	"\<enddef\>"	    skipwhite nextgroup=vimCmdSep,vim9Comment,vimCommentError
+syn match	vimEndfunction	"\<endf\%[unction]\>"	skipwhite nextgroup=vimCmdSep,vimComment,vim9CommentError
+syn match	vimEnddef	"\<enddef\>"		skipwhite nextgroup=vimCmdSep,vim9Comment,vimCommentError
 
 if exists("g:vimsyn_folding") && g:vimsyn_folding =~# 'f'
- syn region	vimFuncFold	start="\<fu\%[nction]\>!\=\s*\%(<[sS][iI][dD]>\|[sg]:\)\=\%(\i\|[#.]\|{.\{-1,}}\)\+\s*(" end="\<endf\%[unction]\>" contains=vimFunction fold keepend extend transparent
- syn region	vimDefFold	start="\<def\>!\=\s*\%(<[sS][iI][dD]>\|[sg]:\)\=\%(\i\|[#.]\)\+("	                 end="\<enddef\>"	       contains=vimDef      fold keepend extend transparent
+  syn region	vimFunctionFold
+        \ start="\<fu\%[nction]!"
+        "\ assume no dict literal in curly-brace name expressions
+        \ start="\<fu\%[nction]\>\s*\%([[:alnum:]_:<>.#]\+\|{.\{-1,}}\)\+\s*("
+        \ end="^\s*:\=\s*endf\%[unction]\>"
+        \ contains=vimFunction
+        \ extend fold keepend transparent
+  syn region	vimDefFold
+        \ start="\<def!"
+        "\ assume no dict literal in curly-brace name expressions
+        \ start="\<def\>\s*\%([[:alnum:]_:<>.#]\+\|{.\{-1,}}\)\+("
+        \ end="^\s*:\=\s*enddef\>"
+        \ contains=vimDef
+        \ extend fold keepend transparent
 endif
 
+syn match	vimDelfunctionBang	contained	"\a\@1<=!"		skipwhite nextgroup=vimFunctionName
+syn match	vimDelfunction			"\<delf\%[unction]\>"	skipwhite nextgroup=vimDelfunctionBang,vimFunctionName
+
 " Types: {{{2
 " =====
 
@@ -525,18 +567,18 @@
   syn region	vim9MethodDefParams	contained
         \ matchgroup=Delimiter start="(" end=")"
         \ skipwhite skipnl nextgroup=vim9MethodDefBody,vim9MethodDefComment,vimEnddef,vim9MethodDefReturnType,vimCommentError
-        \ contains=vimDefParam,vim9Comment,vimFuncParamEquals
+        \ contains=vimDefParam,vim9Comment,vimFunctionParamEquals
 
   syn match	vim9ConstructorDefName	contained	"\<_\=new\w*\>"
         \ nextgroup=vim9ConstructorDefParams
         \ contains=@vim9MethodName
   syn match	vim9ConstructorDefParam	contained	"\<\%(this\.\)\=\h\w*\>"
-        \ skipwhite nextgroup=vimParamType,vimFuncParamEquals
+        \ skipwhite nextgroup=vimParamType,vimFunctionParamEquals
         \ contains=vim9This,vimOper
   syn region	vim9ConstructorDefParams	contained
         \ matchgroup=Delimiter start="(" end=")"
         \ skipwhite skipnl nextgroup=vim9MethodDefBody,vim9MethodDefComment,vimEnddef,vimCommentError
-        \ contains=vim9ConstructorDefParam,vim9Comment,vimFuncParamEquals
+        \ contains=vim9ConstructorDefParam,vim9Comment,vimFunctionParamEquals
 
   syn region	vim9MethodDefReturnType	contained
         \ start=":\%(\s\|\n\)\@="
@@ -655,7 +697,7 @@
   syn region	vim9AbstractDefParams	contained
         \ matchgroup=Delimiter start="(" end=")"
         \ skipwhite skipnl nextgroup=vimDefComment,vim9AbstractDefReturnType,vimCommentError
-        \ contains=vimDefParam,vim9Comment,vimFuncParamEquals
+        \ contains=vimDefParam,vim9Comment,vimFunctionParamEquals
   syn region	vim9AbstractDefReturnType	contained
         \ start=":\s" end="$" matchgroup=vim9Comment end="\ze[#"]"
         \ skipwhite skipnl nextgroup=vimDefComment,vimCommentError
@@ -751,7 +793,7 @@
 " GEN_SYN_VIM: vimUserCmdAttrComplete, START_STR='syn keyword vimUserCmdAttrComplete contained', END_STR=''
 syn keyword vimUserCmdAttrComplete contained arglist augroup behave breakpoint buffer color command compiler cscope diff_buffer dir dir_in_path environment event expression file file_in_path filetype function help highlight history keymap locale mapclear mapping menu messages option packadd runtime scriptnames shellcmd shellcmdline sign syntax syntime tag tag_listfiles user var
 syn keyword	vimUserCmdAttrComplete	contained	custom customlist nextgroup=vimUserCmdAttrCompleteFunc,vimUserCmdError
-syn match	vimUserCmdAttrCompleteFunc	contained	",\%([bwglstav]:\|<[sS][iI][dD]>\)\=\h\w*\%([.#]\h\w*\)*"hs=s+1 nextgroup=vimUserCmdError contains=vimVarScope,vimFuncSID
+syn match	vimUserCmdAttrCompleteFunc	contained	",\%([bwglstav]:\|<[sS][iI][dD]>\)\=\h\w*\%([.#]\h\w*\)*"hs=s+1 nextgroup=vimUserCmdError contains=vimVarScope,vimFunctionSID
 
 " GEN_SYN_VIM: vimUserCmdAttrAddr, START_STR='syn keyword vimUserCmdAttrAddr contained', END_STR=''
 syn keyword vimUserCmdAttrAddr contained arguments arg buffers buf lines line loaded_buffers load other quickfix qf tabs tab windows win
@@ -1378,8 +1420,8 @@
 " Errors And Warnings: {{{2
 " ====================
 if !exists("g:vimsyn_noerror") && !exists("g:vimsyn_novimfunctionerror")
- syn match	vimFunctionError	"\s\zs[a-z0-9]\i\{-}\ze\s*("			contained contains=vimFuncKey,vimFuncBlank
- syn match	vimFunctionError	"\s\zs\%(<[sS][iI][dD]>\|[sSgGbBwWtTlL]:\)\d\i\{-}\ze\s*("	contained contains=vimFuncKey,vimFuncBlank
+ syn match	vimFunctionError	contained	"[[:space:]!]\@1<=\<[a-z0-9]\w\{-}\ze\s*("
+ syn match	vimFunctionError	contained	"\%(<[sS][iI][dD]>\|[sg]:\)\d\w\{-}\ze\s*("
  syn match	vimElseIfErr	"\<else\s\+if\>"
  syn match	vimBufnrWarn	/\<bufnr\s*(\s*["']\.['"]\s*)/
 endif
@@ -1486,7 +1528,7 @@
 endif
 
 syn match	vimSyntax	"\<sy\%[ntax]\>"	contains=vimCommand skipwhite nextgroup=vimSynType,@vimComment
-syn cluster vimFuncBodyList add=vimSyntax
+syn cluster vimFunctionBodyList add=vimSyntax
 
 " Syntax: case {{{2
 syn keyword	vimSynType	contained	case	skipwhite nextgroup=vimSynCase,vimSynCaseError
@@ -2112,11 +2154,14 @@
  hi def link vimCount	Number
  hi def link vimCtrlChar	SpecialChar
  hi def link vimDebuggreedy	vimCommand
+ hi def link vimDef	vimCommand
+ hi def link vimDefBang	vimBang
  hi def link vimDefComment	vim9Comment
- hi def link vimDefKey	vimCommand
  hi def link vimDefParam	vimVar
  hi def link vimDelcommand	vimCommand
  hi def link vimDelcommandAttr	vimUserCmdAttr
+ hi def link vimDelfunction	vimCommand
+ hi def link vimDelfunctionBang	vimBang
  hi def link vimDoautocmd	vimCommand
  hi def link vimDoautocmdMod	Special
  hi def link vimEcho	vimCommand
@@ -2141,15 +2186,15 @@
  hi def link vimForInContinueComment	vimContinueComment
  hi def link vimFTCmd	vimCommand
  hi def link vimFTOption	vimSynType
- hi def link vimFuncBang	vimBang
- hi def link vimFuncComment	vimComment
- hi def link vimFuncKey	vimCommand
+ hi def link vimFunction	vimCommand
+ hi def link vimFunctionBang	vimBang
+ hi def link vimFunctionComment	vimComment
  hi def link vimFuncName	Function
- hi def link vimFuncMod	Special
- hi def link vimFuncParam	vimVar
- hi def link vimFuncParamEquals	vimOper
- hi def link vimFuncScope	vimVarScope
- hi def link vimFuncSID	vimNotation
+ hi def link vimFunctionMod	Special
+ hi def link vimFunctionParam	vimVar
+ hi def link vimFunctionParamEquals	vimOper
+ hi def link vimFunctionScope	vimVarScope
+ hi def link vimFunctionSID	vimNotation
  hi def link vimGrep	vimCommand
  hi def link vimGrepadd	vimCommand
  hi def link vimGrepBang	vimBang
@@ -2200,7 +2245,7 @@
  hi def link vimMapBang	vimBang
  hi def link vimMapLeader	vimBracket
  hi def link vimMapLeaderKey	vimNotation
- hi def link vimMapModKey	vimFuncSID
+ hi def link vimMapModKey	vimFunctionSID
  hi def link vimMapMod	vimBracket
  hi def link vimMap	vimCommand
  hi def link vimMark	Number
diff --git a/runtime/syntax/testdir/dumps/vim_ex_delfunction_00.dump b/runtime/syntax/testdir/dumps/vim_ex_delfunction_00.dump
new file mode 100644
index 0000000..8eb82e7
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/vim_ex_delfunction_00.dump
@@ -0,0 +1,20 @@
+>"+0#0000e05#ffffff0| |V|i|m| |:|d|e|l|f|u|n|c|t|i|o|n| |c|o|m@1|a|n|d| +0#0000000&@48
+@75
+@75
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n| +0#0000000&|F|o@1| @59
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n| +0#0000000&|<+0#e000e06&|S|I|D|>|F+0#0000000&|o@1| @54
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n| +0#0000000&|f|o@1|.|b|a|r| @55
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n| +0#0000000&|g+0#00e0e07&|:|f+0#0000000&|o@1|.|b|a|r| @53
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n| +0#0000000&|s+0#00e0e07&|:|f+0#0000000&|o@1|.|b|a|r| @53
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n| +0#0000000&|f|o@1|#|b|a|r| @55
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n| +0#0000000&|g+0#00e0e07&|:|f+0#0000000&|o@1|#|b|a|r| @53
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n| +0#0000000&|f|o@1|#|b|a|r|.|b|a|z| @51
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n| +0#0000000&|g+0#00e0e07&|:|f+0#0000000&|o@1|#|b|a|r|.|b|a|z| @49
+@75
+@75
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n|!| +0#0000000&|F|o@1| @58
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n|!| +0#0000000&|<+0#e000e06&|S|I|D|>|F+0#0000000&|o@1| @53
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n|!| +0#0000000&|f|o@1|.|b|a|r| @54
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n|!| +0#0000000&|g+0#00e0e07&|:|f+0#0000000&|o@1|.|b|a|r| @52
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n|!| +0#0000000&|s+0#00e0e07&|:|f+0#0000000&|o@1|.|b|a|r| @52
+@57|1|,|1| @10|T|o|p| 
diff --git a/runtime/syntax/testdir/dumps/vim_ex_delfunction_01.dump b/runtime/syntax/testdir/dumps/vim_ex_delfunction_01.dump
new file mode 100644
index 0000000..2b8b90e
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/vim_ex_delfunction_01.dump
@@ -0,0 +1,20 @@
+| +0&#ffffff0@74
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n|!| +0#0000000&|F|o@1| @58
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n|!| +0#0000000&|<+0#e000e06&|S|I|D|>|F+0#0000000&|o@1| @53
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n|!| +0#0000000&|f|o@1|.|b|a|r| @54
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n|!| +0#0000000&|g+0#00e0e07&|:|f+0#0000000&|o@1|.|b|a|r| @52
+>d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n|!| +0#0000000&|s+0#00e0e07&|:|f+0#0000000&|o@1|.|b|a|r| @52
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n|!| +0#0000000&|f|o@1|#|b|a|r| @54
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n|!| +0#0000000&|g+0#00e0e07&|:|f+0#0000000&|o@1|#|b|a|r| @52
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n|!| +0#0000000&|f|o@1|#|b|a|r|.|b|a|z| @50
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n|!| +0#0000000&|g+0#00e0e07&|:|f+0#0000000&|o@1|#|b|a|r|.|b|a|z| @48
+@75
+@75
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n| +0#0000000&|F|o@1| ||| |e+0#af5f00255&|c|h|o| +0#0000000&|"+0#e000002&|F|o@1|"| +0#0000000&@46
+|d+0#af5f00255&|e|l|f|u|n|c|t|i|o|n| +0#0000000&|F|o@1| |"+0#0000e05&| |c|o|m@1|e|n|t| +0#0000000&@49
+@75
+@75
+|"+0#0000e05&| |I|s@1|u|e| |h|t@1|p|s|:|/@1|g|i|t|h|u|b|.|c|o|m|/|v|i|m|/|v|i|m|/|p|u|l@1|/|1|7|4|2|0|#|i|s@1|u|e|c|o|m@1|e|n|t|-|2|9|2|7@1|9|8|6|8|7| +0#0000000&@5
+|"+0#0000e05&| |(|a|r|g| |n|a|m|e|d| |/|f|u|%|\|[|n|c|t|i|o|n|]|/|)| +0#0000000&@46
+|￼| @73
+@57|1|9|,|1| @9|8|6|%| 
diff --git a/runtime/syntax/testdir/dumps/vim_ex_delfunction_02.dump b/runtime/syntax/testdir/dumps/vim_ex_delfunction_02.dump
new file mode 100644
index 0000000..203e37f
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/vim_ex_delfunction_02.dump
@@ -0,0 +1,20 @@
+|￼+0&#ffffff0| @73
+|s+0#af5f00255&|i|l|e|n|t|!| +0#0000000&|d+0#af5f00255&|e|l|f|u|n|c|!| +0#0000000&|f|u|n|c| @53
+> @74
+|~+0#4040ff13&| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+| +0#0000000&@56|3|4|,|0|-|1| @7|B|o|t| 
diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_01.dump b/runtime/syntax/testdir/dumps/vim_ex_function_01.dump
index a14e929..1523d74 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_01.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_01.dump
@@ -17,4 +17,4 @@
 |e+0#af5f00255&|n|d|f|u|n|c|t|i|o|n| +0#0000000&@63
 @75
 |f+0#af5f00255&|u|n|c|t|i|o|n| +0#0000000&|{|"|F|"|}|o|{|"|o|"|}|(+0#e000e06&|)| +0#0000000&@52
-@57|1|9|,|1| @10|6|%| 
+@57|1|9|,|1| @10|5|%| 
diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_02.dump b/runtime/syntax/testdir/dumps/vim_ex_function_02.dump
index e4b5d6a..ebe59a8 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_02.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_02.dump
@@ -17,4 +17,4 @@
 @2|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|4+0#e000002&|2| +0#0000000&@63
 |e+0#af5f00255&|n|d|f|u|n|c|t|i|o|n| +0#0000000&@63
 @75
-@57|3|7|,|0|-|1| @7|1|4|%| 
+@57|3|7|,|0|-|1| @7|1|2|%| 
diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_03.dump b/runtime/syntax/testdir/dumps/vim_ex_function_03.dump
index 94e2ea1..09c3a54 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_03.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_03.dump
@@ -15,6 +15,6 @@
 @2|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|4+0#e000002&|2| +0#0000000&@63
 |e+0#af5f00255&|n|d|f|u|n|c|t|i|o|n| +0#0000000&@63
 @75
-|f+0#af5f00255&|u|n|c|t|i|o|n| +0#0000000&|f|o@1|#|b|a|r|#|F|o@1|(+0#e000e06&|)| +0#0000000&@52
+|f+0#af5f00255&|u|n|c|t|i|o|n| +0#0000000&|b+0#e000e06&|:|d+0#0000000&|i|c|t|.|F|o@1|(+0#e000e06&|)| +0#0000000&@53
 @2|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|4+0#e000002&|2| +0#0000000&@63
-@57|5@1|,|1| @9|2|3|%| 
+@57|5@1|,|1| @9|1|9|%| 
diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_04.dump b/runtime/syntax/testdir/dumps/vim_ex_function_04.dump
index 2dbc75b..9e49064 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_04.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_04.dump
@@ -1,20 +1,20 @@
 | +0&#ffffff0@1|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|4+0#e000002&|2| +0#0000000&@63
 |e+0#af5f00255&|n|d|f|u|n|c|t|i|o|n| +0#0000000&@63
 @75
-|"+0#0000e05&| |s|a|m|e| |n|a|m|e| |a|s| |a|n| |E|x| |c|o|m@1|a|n|d| +0#0000000&@46
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+@2|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|4+0#e000002&|2| +0#0000000&@63
 >e+0#af5f00255&|n|d|f|u|n|c|t|i|o|n| +0#0000000&@63
 @75
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-|"+0#0000e05&| |m|o|d|i|f|i|e|r|s| +0#0000000&@63
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-|f+0#af5f00255&|u|n|c|t|i|o|n| +0#0000000&|F|o@1|(+0#e000e06&|)| +0#0000000&|r+0#e000e06&|a|n|g|e| +0#0000000&@54
-|e+0#af5f00255&|n|d|f|u|n|c|t|i|o|n| +0#0000000&@63
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-|f+0#af5f00255&|u|n|c|t|i|o|n| +0#0000000&|F|o@1|(+0#e000e06&|)| +0#0000000&|r+0#e000e06&|a|n|g|e| +0#0000000&|"+0#0000e05&| |c|o|m@1|e|n|t| +0#0000000&@44
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-|f+0#af5f00255&|u|n|c|t|i|o|n| +0#0000000&|F|o@1|(+0#e000e06&|)| +0#0000000&|r+0#e000e06&|a|n|g|e| +0#0000000&@54
+|f+0#af5f00255&|u|n|c|t|i|o|n| +0#0000000&|t+0#e000e06&|:|d+0#0000000&|i|c|t|.|F|o@1|(+0#e000e06&|)| +0#0000000&@53
 @2|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|4+0#e000002&|2| +0#0000000&@63
 |e+0#af5f00255&|n|d|f|u|n|c|t|i|o|n| +0#0000000&@63
-@57|7|3|,|1| @9|3|1|%| 
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+|f+0#af5f00255&|u|n|c|t|i|o|n| +0#0000000&|g+0#e000e06&|:|d+0#0000000&|i|c|t|.|F|o@1|(+0#e000e06&|)| +0#0000000&@53
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+|e+0#af5f00255&|n|d|f|u|n|c|t|i|o|n| +0#0000000&@63
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+|e+0#af5f00255&|n|d|f|u|n|c|t|i|o|n| +0#0000000&@63
+@75
+@57|7|3|,|1| @9|2|7|%| 
diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_05.dump b/runtime/syntax/testdir/dumps/vim_ex_function_05.dump
index 94f265a..2b726b3 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_05.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_05.dump
@@ -1,20 +1,20 @@
-|e+0#af5f00255#ffffff0|n|d|f|u|n|c|t|i|o|n| +0#0000000&@63
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-|f+0#af5f00255&|u|n|c|t|i|o|n| +0#0000000&|F|o@1|(+0#e000e06&|)| +0#0000000&|a+0#e000e06&|b|o|r|t| +0#0000000&@54
-@2|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|4+0#e000002&|2| +0#0000000&@63
-|e+0#af5f00255&|n|d|f|u|n|c|t|i|o|n| +0#0000000&@63
-> @74
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 @2|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|4+0#e000002&|2| +0#0000000&@63
 |e+0#af5f00255&|n|d|f|u|n|c|t|i|o|n| +0#0000000&@63
 @75
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 @2|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|4+0#e000002&|2| +0#0000000&@63
 |e+0#af5f00255&|n|d|f|u|n|c|t|i|o|n| +0#0000000&@63
 @75
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-@75
-|f+0#af5f00255&|u|n|c|t|i|o|n|!| +0#0000000&|F|o@1|(+0#e000e06&|)| +0#0000000&|r+0#e000e06&|a|n|g|e| +0#0000000&@53
-@57|9|1|,|0|-|1| @7|4|0|%| 
+@57|9|1|,|1| @9|3|4|%| 
diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_06.dump b/runtime/syntax/testdir/dumps/vim_ex_function_06.dump
index f771e63..ad75d36 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_06.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_06.dump
@@ -1,20 +1,20 @@
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 @75
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 |e+0#af5f00255&|n|d|f|u|n|c|t|i|o|n| +0#0000000&@63
 @75
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 |e+0#af5f00255&|n|d|f|u|n|c|t|i|o|n| +0#0000000&@63
 @75
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 @75
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-|e+0#af5f00255&|n|d|f|u|n|c|t|i|o|n| +0#0000000&@63
-@57|1|0|9|,|3| @8|4|9|%| 
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_07.dump b/runtime/syntax/testdir/dumps/vim_ex_function_07.dump
index 325c943..5b68b92 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_07.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_07.dump
@@ -1,20 +1,20 @@
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 |e+0#af5f00255&|n|d|f|u|n|c|t|i|o|n| +0#0000000&@63
 @75
-|f+0#af5f00255&|u|n|c|t|i|o|n| +0#0000000&|F|o@1|(+0#e000e06&|)| +0#0000000&@60
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_08.dump b/runtime/syntax/testdir/dumps/vim_ex_function_08.dump
index 9239196..e49c5ff 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_08.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_08.dump
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_09.dump b/runtime/syntax/testdir/dumps/vim_ex_function_09.dump
index 7171137..19f42e1 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_09.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_09.dump
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_10.dump b/runtime/syntax/testdir/dumps/vim_ex_function_10.dump
index 9a7eff4..cd29b74 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_10.dump
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_11.dump b/runtime/syntax/testdir/dumps/vim_ex_function_11.dump
index 98e0c79..6ada5e7 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_11.dump
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_12.dump b/runtime/syntax/testdir/dumps/vim_ex_function_12.dump
index 2e431aa..8968153 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_12.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_12.dump
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_13.dump b/runtime/syntax/testdir/dumps/vim_ex_function_13.dump
new file mode 100644
index 0000000..066f06c
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_13.dump
@@ -0,0 +1,20 @@
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_14.dump b/runtime/syntax/testdir/dumps/vim_ex_function_14.dump
new file mode 100644
index 0000000..6d0e2d7
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_14.dump
@@ -0,0 +1,20 @@
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_15.dump b/runtime/syntax/testdir/dumps/vim_ex_function_15.dump
new file mode 100644
index 0000000..df284e0
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_15.dump
@@ -0,0 +1,20 @@
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_fold_01.dump b/runtime/syntax/testdir/dumps/vim_ex_function_fold_01.dump
index 326df16..ac29b85 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_fold_01.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_fold_01.dump
@@ -17,4 +17,4 @@
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_fold_02.dump b/runtime/syntax/testdir/dumps/vim_ex_function_fold_02.dump
index 8eb430d..7bb08c7 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_fold_02.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_fold_02.dump
@@ -17,4 +17,4 @@
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_fold_03.dump b/runtime/syntax/testdir/dumps/vim_ex_function_fold_03.dump
index 8af7190..b41ea7e 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_fold_03.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_fold_03.dump
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_fold_04.dump b/runtime/syntax/testdir/dumps/vim_ex_function_fold_04.dump
index 6a9fd94..f6a6ff3 100644
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_fold_05.dump b/runtime/syntax/testdir/dumps/vim_ex_function_fold_05.dump
index e0e97ad..b3555a3 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_fold_05.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_fold_05.dump
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_fold_06.dump b/runtime/syntax/testdir/dumps/vim_ex_function_fold_06.dump
index 934e311..8a38361 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_fold_06.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_fold_06.dump
@@ -1,20 +1,20 @@
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_fold_07.dump b/runtime/syntax/testdir/dumps/vim_ex_function_fold_07.dump
index fba5b01..3a6a96e 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_fold_07.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_fold_07.dump
@@ -1,20 +1,20 @@
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_fold_08.dump b/runtime/syntax/testdir/dumps/vim_ex_function_fold_08.dump
index b4007e6..0ee8bbc 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_fold_08.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_fold_08.dump
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_fold_09.dump b/runtime/syntax/testdir/dumps/vim_ex_function_fold_09.dump
index 47b294c..12e9f33 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_fold_09.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_fold_09.dump
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_fold_10.dump b/runtime/syntax/testdir/dumps/vim_ex_function_fold_10.dump
index dd7f7a1..091bed6 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_fold_10.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_fold_10.dump
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_fold_11.dump b/runtime/syntax/testdir/dumps/vim_ex_function_fold_11.dump
index 631cb21..dc37818 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_fold_11.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_fold_11.dump
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_fold_12.dump b/runtime/syntax/testdir/dumps/vim_ex_function_fold_12.dump
index 7fd54b4..ab806b1 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_fold_12.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_fold_12.dump
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_fold_13.dump b/runtime/syntax/testdir/dumps/vim_ex_function_fold_13.dump
index e8f41da..96bd8fc 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_fold_13.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_fold_13.dump
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_fold_14.dump b/runtime/syntax/testdir/dumps/vim_ex_function_fold_14.dump
index 5459f01..94063c1 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_fold_14.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_fold_14.dump
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_fold_15.dump b/runtime/syntax/testdir/dumps/vim_ex_function_fold_15.dump
index e77a995..02db046 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_fold_15.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_fold_15.dump
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_fold_16.dump b/runtime/syntax/testdir/dumps/vim_ex_function_fold_16.dump
index 81c8a8c..e3d9bbd 100644
--- a/runtime/syntax/testdir/dumps/vim_ex_function_fold_16.dump
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_fold_16.dump
@@ -1,20 +1,20 @@
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_fold_17.dump b/runtime/syntax/testdir/dumps/vim_ex_function_fold_17.dump
new file mode 100644
index 0000000..db3157e
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_fold_17.dump
@@ -0,0 +1,20 @@
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_fold_18.dump b/runtime/syntax/testdir/dumps/vim_ex_function_fold_18.dump
new file mode 100644
index 0000000..dfdba91
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/vim_ex_function_fold_18.dump
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diff --git a/runtime/syntax/testdir/dumps/vim_ex_function_fold_19.dump b/runtime/syntax/testdir/dumps/vim_ex_function_fold_19.dump
new file mode 100644
index 0000000..6d5f7a8
--- /dev/null
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+|~| @73
+|~| @73
+| +0#0000000&@56|3|4|2|,|0|-|1| @6|B|o|t| 
diff --git a/runtime/syntax/testdir/input/setup/vim9_ex_function_def_tail_comment_errors.vim b/runtime/syntax/testdir/input/setup/vim9_ex_function_def_tail_comment_errors.vim
index c039651..9dee81d 100644
--- a/runtime/syntax/testdir/input/setup/vim9_ex_function_def_tail_comment_errors.vim
+++ b/runtime/syntax/testdir/input/setup/vim9_ex_function_def_tail_comment_errors.vim
@@ -1,2 +1,2 @@
 highlight link vimVar Identifier
-highlight link vimFuncScope Special
+highlight link vimFunctionScope Special
diff --git a/runtime/syntax/testdir/input/setup/vim9_ex_function_def_tail_comments.vim b/runtime/syntax/testdir/input/setup/vim9_ex_function_def_tail_comments.vim
index c039651..9dee81d 100644
--- a/runtime/syntax/testdir/input/setup/vim9_ex_function_def_tail_comments.vim
+++ b/runtime/syntax/testdir/input/setup/vim9_ex_function_def_tail_comments.vim
@@ -1,2 +1,2 @@
 highlight link vimVar Identifier
-highlight link vimFuncScope Special
+highlight link vimFunctionScope Special
diff --git a/runtime/syntax/testdir/input/setup/vim_ex_def.vim b/runtime/syntax/testdir/input/setup/vim_ex_def.vim
index c039651..9dee81d 100644
--- a/runtime/syntax/testdir/input/setup/vim_ex_def.vim
+++ b/runtime/syntax/testdir/input/setup/vim_ex_def.vim
@@ -1,2 +1,2 @@
 highlight link vimVar Identifier
-highlight link vimFuncScope Special
+highlight link vimFunctionScope Special
diff --git a/runtime/syntax/testdir/input/setup/vim_ex_def_fold.vim b/runtime/syntax/testdir/input/setup/vim_ex_def_fold.vim
index c039651..9dee81d 100644
--- a/runtime/syntax/testdir/input/setup/vim_ex_def_fold.vim
+++ b/runtime/syntax/testdir/input/setup/vim_ex_def_fold.vim
@@ -1,2 +1,2 @@
 highlight link vimVar Identifier
-highlight link vimFuncScope Special
+highlight link vimFunctionScope Special
diff --git a/runtime/syntax/testdir/input/setup/vim_ex_function.vim b/runtime/syntax/testdir/input/setup/vim_ex_function.vim
index c039651..9dee81d 100644
--- a/runtime/syntax/testdir/input/setup/vim_ex_function.vim
+++ b/runtime/syntax/testdir/input/setup/vim_ex_function.vim
@@ -1,2 +1,2 @@
 highlight link vimVar Identifier
-highlight link vimFuncScope Special
+highlight link vimFunctionScope Special
diff --git a/runtime/syntax/testdir/input/setup/vim_ex_function_def_tail_comment_errors.vim b/runtime/syntax/testdir/input/setup/vim_ex_function_def_tail_comment_errors.vim
index c039651..9dee81d 100644
--- a/runtime/syntax/testdir/input/setup/vim_ex_function_def_tail_comment_errors.vim
+++ b/runtime/syntax/testdir/input/setup/vim_ex_function_def_tail_comment_errors.vim
@@ -1,2 +1,2 @@
 highlight link vimVar Identifier
-highlight link vimFuncScope Special
+highlight link vimFunctionScope Special
diff --git a/runtime/syntax/testdir/input/setup/vim_ex_function_def_tail_comments.vim b/runtime/syntax/testdir/input/setup/vim_ex_function_def_tail_comments.vim
index c039651..9dee81d 100644
--- a/runtime/syntax/testdir/input/setup/vim_ex_function_def_tail_comments.vim
+++ b/runtime/syntax/testdir/input/setup/vim_ex_function_def_tail_comments.vim
@@ -1,2 +1,2 @@
 highlight link vimVar Identifier
-highlight link vimFuncScope Special
+highlight link vimFunctionScope Special
diff --git a/runtime/syntax/testdir/input/setup/vim_ex_function_fold.vim b/runtime/syntax/testdir/input/setup/vim_ex_function_fold.vim
index c039651..9dee81d 100644
--- a/runtime/syntax/testdir/input/setup/vim_ex_function_fold.vim
+++ b/runtime/syntax/testdir/input/setup/vim_ex_function_fold.vim
@@ -1,2 +1,2 @@
 highlight link vimVar Identifier
-highlight link vimFuncScope Special
+highlight link vimFunctionScope Special
diff --git a/runtime/syntax/testdir/input/setup/vim_ex_syntax.vim b/runtime/syntax/testdir/input/setup/vim_ex_syntax.vim
index c039651..9dee81d 100644
--- a/runtime/syntax/testdir/input/setup/vim_ex_syntax.vim
+++ b/runtime/syntax/testdir/input/setup/vim_ex_syntax.vim
@@ -1,2 +1,2 @@
 highlight link vimVar Identifier
-highlight link vimFuncScope Special
+highlight link vimFunctionScope Special
diff --git a/runtime/syntax/testdir/input/vim_ex_delfunction.vim b/runtime/syntax/testdir/input/vim_ex_delfunction.vim
new file mode 100644
index 0000000..18ecd48
--- /dev/null
+++ b/runtime/syntax/testdir/input/vim_ex_delfunction.vim
@@ -0,0 +1,34 @@
+" Vim :delfunction command
+
+
+delfunction Foo
+delfunction <SID>Foo
+delfunction foo.bar
+delfunction g:foo.bar
+delfunction s:foo.bar
+delfunction foo#bar
+delfunction g:foo#bar
+delfunction foo#bar.baz
+delfunction g:foo#bar.baz
+
+
+delfunction! Foo
+delfunction! <SID>Foo
+delfunction! foo.bar
+delfunction! g:foo.bar
+delfunction! s:foo.bar
+delfunction! foo#bar
+delfunction! g:foo#bar
+delfunction! foo#bar.baz
+delfunction! g:foo#bar.baz
+
+
+delfunction Foo | echo "Foo"
+delfunction Foo " comment
+
+
+" Issue https://github.com/vim/vim/pull/17420#issuecomment-2927798687
+" (arg named /fu%\[nction]/)
+￼
+silent! delfunc! func
+
diff --git a/runtime/syntax/testdir/input/vim_ex_function.vim b/runtime/syntax/testdir/input/vim_ex_function.vim
index dc11f39..cf07013 100644
--- a/runtime/syntax/testdir/input/vim_ex_function.vim
+++ b/runtime/syntax/testdir/input/vim_ex_function.vim
@@ -64,10 +64,48 @@
   return 42
 endfunction
 
+function b:dict.Foo()
+  return 42
+endfunction
+
+function w:dict.Foo()
+  return 42
+endfunction
+
+function t:dict.Foo()
+  return 42
+endfunction
+
+function g:dict.Foo()
+  return 42
+endfunction
+
+function s:dict.Foo()
+  return 42
+endfunction
+
+function v:dict.Foo()
+  return 42
+endfunction
+
+function Foo(arg)
+  let l:dict = {}
+  function l:dict.BAR()
+    return 42
+  endfunction
+  function a:arg.BAR()
+    return 42
+  endfunction
+endfunction
+
 function foo#bar#Foo()
   return 42
 endfunction
 
+function g:foo#bar#Foo()
+  return 42
+endfunction
+
 " same name as an Ex command
 function s:ls()
 endfunction
@@ -152,6 +190,14 @@
   return 42
 endfunction
 
+function Foo(
+        x,
+        y,
+        z,
+        ...)
+  return 42
+endfunction
+
 function Foo(x, y = 42, z = "zed")
   return 42
 endfunction
@@ -163,6 +209,13 @@
   return 42
 endfunction
 
+function Foo(
+        x,
+        y = 42,
+        z = "zed")
+  return 42
+endfunction
+
 
 " arguments
 
@@ -204,25 +257,9 @@
 endfunction
 
 
-" delete function
-
-delfunction Foo
-delfunction foo.bar
-delfunction! Foo
-delfunction foo.bar
-
-
-" Issue https://github.com/vim/vim/pull/17420#issuecomment-2927798687
-" (arg named /fu%\[nction]/)
-
-" FIXME
-silent! delfunc! func
-
-
 " Issue https://github.com/vim/vim/pull/17420#issuecomment-2927798687
 " (function named /s:fu%\[nction]/)
-
-" FIXME
+￼
 func! s:func(_, func)
     return a:func
 endfunc
diff --git a/runtime/syntax/testdir/input/vim_ex_function_fold.vim b/runtime/syntax/testdir/input/vim_ex_function_fold.vim
index 1be9c25..37a8fa4 100644
--- a/runtime/syntax/testdir/input/vim_ex_function_fold.vim
+++ b/runtime/syntax/testdir/input/vim_ex_function_fold.vim
@@ -66,10 +66,48 @@
   return 42
 endfunction
 
+function b:dict.Foo()
+  return 42
+endfunction
+
+function w:dict.Foo()
+  return 42
+endfunction
+
+function t:dict.Foo()
+  return 42
+endfunction
+
+function g:dict.Foo()
+  return 42
+endfunction
+
+function s:dict.Foo()
+  return 42
+endfunction
+
+function v:dict.Foo()
+  return 42
+endfunction
+
+function Foo(arg)
+  let l:dict = {}
+  function l:dict.BAR()
+    return 42
+  endfunction
+  function a:arg.BAR()
+    return 42
+  endfunction
+endfunction
+
 function foo#bar#Foo()
   return 42
 endfunction
 
+function g:foo#bar#Foo()
+  return 42
+endfunction
+
 " same name as an Ex command
 function s:ls()
 endfunction
@@ -154,6 +192,14 @@
   return 42
 endfunction
 
+function Foo(
+        x,
+        y,
+        z,
+        ...)
+  return 42
+endfunction
+
 function Foo(x, y = 42, z = "zed")
   return 42
 endfunction
@@ -165,6 +211,13 @@
   return 42
 endfunction
 
+function Foo(
+        x,
+        y = 42,
+        z = "zed")
+  return 42
+endfunction
+
 
 " arguments
 
@@ -179,6 +232,12 @@
 endfunction
 
 
+" Issue #16243 (Vim script def parameters syntax highlight is wrong)
+
+function Test(lines = [line('.'), line('.')])
+endfunction
+
+
 " comments
 
 function Foo()
@@ -200,12 +259,12 @@
 endfunction
 
 
-" delete function
-
-delfunction Foo
-delfunction foo.bar
-delfunction! Foo
-delfunction foo.bar
+" Issue https://github.com/vim/vim/pull/17420#issuecomment-2927798687
+" (function named /s:fu%\[nction]/)
+￼
+func! s:func(_, func)
+    return a:func
+endfunc
 
 
 " fold-region ending
diff --git a/runtime/syntax/vim.vim b/runtime/syntax/vim.vim
index df67b72..fe50133 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 <dougkearns@gmail.com>
-" Last Change:	   2025 Jun 08
+" Last Change:	   2025 Jun 11
 " Former Maintainer: Charles E. Campbell
 
 " DO NOT CHANGE DIRECTLY.
@@ -34,11 +34,11 @@
 " regular vim commands {{{2
 " GEN_SYN_VIM: vimCommand normal, START_STR='syn keyword vimCommand contained', END_STR='nextgroup=vimBang'
 syn keyword vimCommand contained abo[veleft] al[l] ar[gs] arga[dd] argd[elete] argdo argded[upe] arge[dit] argg[lobal] argl[ocal] argu[ment] as[cii] b[uffer] bN[ext] ba[ll] bad[d] balt bd[elete] bel[owright] bf[irst] bl[ast] bm[odified] bn[ext] bo[tright] bp[revious] br[ewind] brea[k] breaka[dd] breakd[el] breakl[ist] bro[wse] buffers bufd[o] bun[load] bw[ipeout] c[hange] cN[ext] cNf[ile] cabo[ve] cad[dbuffer] cadde[xpr] caddf[ile] caf[ter] cb[uffer] cbe[fore] cbel[ow] cbo[ttom] cc ccl[ose] cd cdo ce[nter] cex[pr] cf[ile] cfd[o] cfir[st] cg[etfile] cgetb[uffer] cgete[xpr] chd[ir] changes che[ckpath] checkt[ime] chi[story] cl[ist] cla[st] clo[se] cle[arjumps] cn[ext] cnew[er] cnf[ile] co[py] col[der] colo[rscheme] com[mand] comc[lear] comp[iler] con[tinue] conf[irm] nextgroup=vimBang
-syn keyword vimCommand contained cons[t] cope[n] cp[revious] cpf[ile] cq[uit] cr[ewind] cs[cope] cst[ag] cw[indow] d[elete] delm[arks] deb[ug] defc[ompile] defe[r] delf[unction] di[splay] dif[fupdate] diffg[et] diffo[ff] diffp[atch] diffpu[t] diffs[plit] difft[his] dig[raphs] disa[ssemble] dj[ump] dli[st] dr[op] ds[earch] dsp[lit] e[dit] ea[rlier] em[enu] endfo[r] endt[ry] endw[hile] ene[w] ev[al] ex exi[t] exu[sage] f[ile] files filet[ype] fin[d] fina[lly] fini[sh] fir[st] fix[del] fo[ld] foldc[lose] foldd[oopen] folddoc[losed] foldo[pen] g[lobal] go[to] gu[i] gv[im] h[elp] helpc[lose] helpf[ind] helpt[ags] ha[rdcopy] hi[ghlight] hid[e] his[tory] hor[izontal] ij[ump] il[ist] int[ro] ip[ut] is[earch] isp[lit] j[oin] ju[mps] kee[pmarks] keepj[umps] keepp[atterns] nextgroup=vimBang
-syn keyword vimCommand contained keepa[lt] l[ist] lN[ext] lNf[ile] la[st] lab[ove] lan[guage] lad[dexpr] laddb[uffer] laddf[ile] laf[ter] lat[er] lb[uffer] lbe[fore] lbel[ow] lbo[ttom] lc[d] lch[dir] lcl[ose] lcs[cope] ld[o] le[ft] lefta[bove] lex[pr] leg[acy] lf[ile] lfd[o] lfir[st] lg[etfile] lgetb[uffer] lgete[xpr] lgr[ep] lgrepa[dd] lhi[story] ll lla[st] lli[st] lmak[e] lne[xt] lnew[er] lnf[ile] lo[adview] loc[kmarks] lockv[ar] lol[der] lop[en] lp[revious] lpf[ile] lr[ewind] lt[ag] lw[indow] ls m[ove] marks menut[ranslate] mes[sages] mk[exrc] mks[ession] mksp[ell] mkv[imrc] mkvie[w] mod[e] n[ext] nb[key] nbc[lose] nbs[tart] noa[utocmd] noh[lsearch] nos[wapfile] nu[mber] o[pen] ol[dfiles] on[ly] opt[ions] ow[nsyntax] p[rint] pa[ckadd] packl[oadall] pb[uffer] nextgroup=vimBang
-syn keyword vimCommand contained pc[lose] ped[it] po[p] pp[op] pre[serve] prev[ious] pro[mptfind] promptr[epl] ps[earch] pt[ag] ptN[ext] ptf[irst] ptj[ump] ptl[ast] ptn[ext] ptp[revious] ptr[ewind] pts[elect] pu[t] pw[d] q[uit] quita[ll] qa[ll] r[ead] rec[over] red[o] redr[aw] redraws[tatus] redrawt[abline] redrawtabp[anel] reg[isters] res[ize] ret[ab] rew[ind] ri[ght] rightb[elow] ru[ntime] rub[y] rubyd[o] rubyf[ile] rund[o] rv[iminfo] sN[ext] sa[rgument] sal[l] san[dbox] sav[eas] sb[uffer] sbN[ext] sba[ll] sbf[irst] sbl[ast] sbm[odified] sbn[ext] sbp[revious] sbr[ewind] scr[iptnames] scripte[ncoding] scriptv[ersion] scs[cope] setf[iletype] sf[ind] sfir[st] sh[ell] sim[alt] sig[n] sil[ent] sla[st] sn[ext] so[urce] sp[lit] spe[llgood] spelld[ump] spelli[nfo] spellr[epall] nextgroup=vimBang
-syn keyword vimCommand contained spellra[re] spellu[ndo] spellw[rong] spr[evious] sre[wind] st[op] sta[g] star[tinsert] startg[replace] startr[eplace] stopi[nsert] stj[ump] sts[elect] sun[hide] sus[pend] sv[iew] sw[apname] synti[me] sync[bind] smi[le] t tN[ext] ta[g] tags tab tabc[lose] tabd[o] tabe[dit] tabf[ind] tabfir[st] tabm[ove] tabl[ast] tabn[ext] tabnew tabo[nly] tabp[revious] tabN[ext] tabr[ewind] tabs tc[d] tch[dir] te[aroff] ter[minal] tf[irst] tj[ump] tl[ast] tn[ext] to[pleft] tp[revious] tr[ewind] try ts[elect] u[ndo] undoj[oin] undol[ist] unh[ide] unlo[ckvar] uns[ilent] up[date] v[global] ve[rsion] verb[ose] vert[ical] vi[sual] vie[w] vim9[cmd] viu[sage] vne[w] vs[plit] w[rite] wN[ext] wa[ll] wi[nsize] winc[md] wind[o] winp[os] wn[ext] wp[revious] nextgroup=vimBang
-syn keyword vimCommand contained wq wqa[ll] wu[ndo] wv[iminfo] x[it] xa[ll] xr[estore] y[ank] z dl dell delel deletl deletel dp dep delp delep deletp deletep a i nextgroup=vimBang
+syn keyword vimCommand contained cons[t] cope[n] cp[revious] cpf[ile] cq[uit] cr[ewind] cs[cope] cst[ag] cw[indow] d[elete] delm[arks] deb[ug] defc[ompile] defe[r] di[splay] dif[fupdate] diffg[et] diffo[ff] diffp[atch] diffpu[t] diffs[plit] difft[his] dig[raphs] disa[ssemble] dj[ump] dli[st] dr[op] ds[earch] dsp[lit] e[dit] ea[rlier] em[enu] endfo[r] endt[ry] endw[hile] ene[w] ev[al] ex exi[t] exu[sage] f[ile] files filet[ype] fin[d] fina[lly] fini[sh] fir[st] fix[del] fo[ld] foldc[lose] foldd[oopen] folddoc[losed] foldo[pen] g[lobal] go[to] gu[i] gv[im] h[elp] helpc[lose] helpf[ind] helpt[ags] ha[rdcopy] hi[ghlight] hid[e] his[tory] hor[izontal] ij[ump] il[ist] int[ro] ip[ut] is[earch] isp[lit] j[oin] ju[mps] kee[pmarks] keepj[umps] keepp[atterns] keepa[lt] l[ist] nextgroup=vimBang
+syn keyword vimCommand contained lN[ext] lNf[ile] la[st] lab[ove] lan[guage] lad[dexpr] laddb[uffer] laddf[ile] laf[ter] lat[er] lb[uffer] lbe[fore] lbel[ow] lbo[ttom] lc[d] lch[dir] lcl[ose] lcs[cope] ld[o] le[ft] lefta[bove] lex[pr] leg[acy] lf[ile] lfd[o] lfir[st] lg[etfile] lgetb[uffer] lgete[xpr] lgr[ep] lgrepa[dd] lhi[story] ll lla[st] lli[st] lmak[e] lne[xt] lnew[er] lnf[ile] lo[adview] loc[kmarks] lockv[ar] lol[der] lop[en] lp[revious] lpf[ile] lr[ewind] lt[ag] lw[indow] ls m[ove] marks menut[ranslate] mes[sages] mk[exrc] mks[ession] mksp[ell] mkv[imrc] mkvie[w] mod[e] n[ext] nb[key] nbc[lose] nbs[tart] noa[utocmd] noh[lsearch] nos[wapfile] nu[mber] o[pen] ol[dfiles] on[ly] opt[ions] ow[nsyntax] p[rint] pa[ckadd] packl[oadall] pb[uffer] pc[lose] ped[it] nextgroup=vimBang
+syn keyword vimCommand contained po[p] pp[op] pre[serve] prev[ious] pro[mptfind] promptr[epl] ps[earch] pt[ag] ptN[ext] ptf[irst] ptj[ump] ptl[ast] ptn[ext] ptp[revious] ptr[ewind] pts[elect] pu[t] pw[d] q[uit] quita[ll] qa[ll] r[ead] rec[over] red[o] redr[aw] redraws[tatus] redrawt[abline] redrawtabp[anel] reg[isters] res[ize] ret[ab] rew[ind] ri[ght] rightb[elow] ru[ntime] rub[y] rubyd[o] rubyf[ile] rund[o] rv[iminfo] sN[ext] sa[rgument] sal[l] san[dbox] sav[eas] sb[uffer] sbN[ext] sba[ll] sbf[irst] sbl[ast] sbm[odified] sbn[ext] sbp[revious] sbr[ewind] scr[iptnames] scripte[ncoding] scriptv[ersion] scs[cope] setf[iletype] sf[ind] sfir[st] sh[ell] sim[alt] sig[n] sil[ent] sla[st] sn[ext] so[urce] sp[lit] spe[llgood] spelld[ump] spelli[nfo] spellr[epall] spellra[re] nextgroup=vimBang
+syn keyword vimCommand contained spellu[ndo] spellw[rong] spr[evious] sre[wind] st[op] sta[g] star[tinsert] startg[replace] startr[eplace] stopi[nsert] stj[ump] sts[elect] sun[hide] sus[pend] sv[iew] sw[apname] synti[me] sync[bind] smi[le] t tN[ext] ta[g] tags tab tabc[lose] tabd[o] tabe[dit] tabf[ind] tabfir[st] tabm[ove] tabl[ast] tabn[ext] tabnew tabo[nly] tabp[revious] tabN[ext] tabr[ewind] tabs tc[d] tch[dir] te[aroff] ter[minal] tf[irst] tj[ump] tl[ast] tn[ext] to[pleft] tp[revious] tr[ewind] try ts[elect] u[ndo] undoj[oin] undol[ist] unh[ide] unlo[ckvar] uns[ilent] up[date] v[global] ve[rsion] verb[ose] vert[ical] vi[sual] vie[w] vim9[cmd] viu[sage] vne[w] vs[plit] w[rite] wN[ext] wa[ll] wi[nsize] winc[md] wind[o] winp[os] wn[ext] wp[revious] wq wqa[ll] nextgroup=vimBang
+syn keyword vimCommand contained wu[ndo] wv[iminfo] x[it] xa[ll] xr[estore] y[ank] z dl dell delel deletl deletel dp dep delp delep deletp deletep a i nextgroup=vimBang
 
 " Lower priority for _new_ to distinguish constructors from the command.
 syn match   vimCommand contained	"\<new\>(\@!"
@@ -286,7 +286,7 @@
 syn case match
 
 " All vimCommands are contained by vimIsCommand. {{{2
-syn cluster vimCmdList	contains=vimAbb,vimAddress,vimAutocmd,vimAugroup,vimBehave,vimCall,vimCatch,vimConst,vimDoautocmd,vimDebuggreedy,vimDef,vimDefFold,vimDelcommand,@vimEcho,vimElse,vimEnddef,vimEndfunction,vimEndif,vimExecute,vimIsCommand,vimExtCmd,vimExFilter,vimExMark,vimFor,vimFunction,vimFuncFold,vimGrep,vimGrepAdd,vimGlobal,vimHelpgrep,vimHighlight,vimImport,vimLet,vimLoadkeymap,vimLockvar,vimMake,vimMap,vimMark,vimMatch,vimNotFunc,vimNormal,vimProfdel,vimProfile,vimRedir,vimSet,vimSleep,vimSort,vimSyntax,vimThrow,vimUnlet,vimUnlockvar,vimUnmap,vimUserCmd,vimVimgrep,vimVimgrepadd,vimMenu,vimMenutranslate,@vim9CmdList,@vimExUserCmdList,vimLua,vimMzScheme,vimPerl,vimPython,vimPython3,vimPythonX,vimRuby,vimTcl
+syn cluster vimCmdList	contains=vimAbb,vimAddress,vimAutocmd,vimAugroup,vimBehave,vimCall,vimCatch,vimConst,vimDoautocmd,vimDebuggreedy,vimDef,vimDefFold,vimDelcommand,vimDelFunction,@vimEcho,vimElse,vimEnddef,vimEndfunction,vimEndif,vimExecute,vimIsCommand,vimExtCmd,vimExFilter,vimExMark,vimFor,vimFunction,vimFunctionFold,vimGrep,vimGrepAdd,vimGlobal,vimHelpgrep,vimHighlight,vimImport,vimLet,vimLoadkeymap,vimLockvar,vimMake,vimMap,vimMark,vimMatch,vimNotFunc,vimNormal,vimProfdel,vimProfile,vimRedir,vimSet,vimSleep,vimSort,vimSyntax,vimThrow,vimUnlet,vimUnlockvar,vimUnmap,vimUserCmd,vimVimgrep,vimVimgrepadd,vimMenu,vimMenutranslate,@vim9CmdList,@vimExUserCmdList,vimLua,vimMzScheme,vimPerl,vimPython,vimPython3,vimPythonX,vimRuby,vimTcl
 syn cluster vim9CmdList	contains=vim9Abstract,vim9Class,vim9Const,vim9Enum,vim9Export,vim9Final,vim9For,vim9Interface,vim9Type,vim9Var
 syn match vimCmdSep	"\\\@1<!|"	skipwhite nextgroup=@vimCmdList,vimSubst1,vimFunc
 syn match vimCmdSep	":\+"	skipwhite nextgroup=@vimCmdList,vimSubst1
@@ -477,7 +477,7 @@
       \ skip=+\n\s*\%(\\\|"\\ \)+
       \ end="}" end="$"
       \ contains=@vimContinue,@vimExprList,vimLambdaParams
-syn match	vimLambdaParams	contained	"\%({\n\=\)\@1<=\_.\{-}\%(->\)\@=" nextgroup=vimLambdaOperator contains=@vimContinue,vimFuncParam
+syn match	vimLambdaParams	contained	"\%({\n\=\)\@1<=\_.\{-}\%(->\)\@=" nextgroup=vimLambdaOperator contains=@vimContinue,vimFunctionParam
 
 syn match	vim9LambdaOperator   contained	"=>" skipwhite skipempty nextgroup=@vimExprList,vim9LambdaBlock,vim9LambdaOperatorComment
 syn match	vim9LambdaParen      contained	"[()]"
@@ -492,56 +492,98 @@
 
 " Functions: Tag is provided for those who wish to highlight tagged functions {{{2
 " =========
-syn cluster	vimFuncList	contains=vimFuncBang,vimFunctionError,vimFuncKey,vimFuncScope,vimFuncSID,Tag
-syn cluster	vimDefList	contains=vimFuncBang,vimFunctionError,vimDefKey,vimFuncScope,vimFuncSID,Tag
+syn cluster	vimFunctionBodyCommon	contains=@vimCmdList,vimCmplxRepeat,vimContinue,vimCtrlChar,vimDef,vimFBVar,vimFunc,vimFunction,vimNotFunc,vimNumber,vimOper,vimOperParen,vimRegister,vimSpecFile,vimString,vimSubst,vimFunctionFold,vimDefFold,vimCmdSep
+syn cluster	vimFunctionBodyList	contains=@vimFunctionBodyCommon,vimComment,vimLineComment,vimInsert,vimConst,vimLet,vimSearch
+syn cluster	vimDefBodyList		contains=@vimFunctionBodyCommon,vim9Comment,vim9LineComment,vim9Block,vim9Const,vim9Final,vim9Var,vim9Null,vim9Boolean,vim9For,vim9LhsVariable,vim9LhsVariableList,vim9LhsRegister,vim9Search,@vimSpecialVar
 
-syn cluster	vimFuncBodyCommon	contains=@vimCmdList,vimCmplxRepeat,vimContinue,vimCtrlChar,vimDef,vimFBVar,vimFunc,vimFunction,vimNotFunc,vimNumber,vimOper,vimOperParen,vimRegister,vimSpecFile,vimString,vimSubst,vimFuncFold,vimDefFold
-syn cluster	vimFuncBodyList	contains=@vimFuncBodyCommon,vimComment,vimLineComment,vimInsert,vimConst,vimLet,vimSearch
-syn cluster	vimDefBodyList	contains=@vimFuncBodyCommon,vim9Comment,vim9LineComment,vim9Block,vim9Const,vim9Final,vim9Var,vim9Null,vim9Boolean,vim9For,vim9LhsVariable,vim9LhsVariableList,vim9LhsRegister,vim9Search,@vimSpecialVar
-
-syn region	vimFuncPattern	contained		matchgroup=vimOper start="/" end="$" contains=@vimSubstList
-syn match	vimFunction	"\<fu\%[nction]\>"	skipwhite nextgroup=vimCmdSep,vimComment,vimFuncPattern contains=vimFuncKey
-syn match	vimDef	"\<def\>"		skipwhite nextgroup=vimCmdSep,vimComment,vimFuncPattern contains=vimDefKey
-
-syn match	vimFunction	"\<fu\%[nction]\>!\=\s*\%(<[sS][iI][dD]>\|[sg]:\)\=\%(\i\|[#.]\|{.\{-1,}}\)\+"	contains=@vimFuncList skipwhite nextgroup=vimFuncParams
-syn match	vimDef	"\<def\>!\=\s*\%(<[sS][iI][dD]>\|[sg]:\)\=\%(\i\|[#.]\|{.\{-1,}}\)\+"		contains=@vimDefList            nextgroup=vimDefParams
-
-syn region	vimFuncComment	contained
-      \ start=+".*+
-      \ skip=+\n\s*\\\|\n\s*"\\ +
+syn region	vimFunctionPattern	contained
+      \ matchgroup=vimOper
+      \ start="/"
       \ end="$"
-      \ skipwhite skipempty nextgroup=vimFuncBody,vimEndfunction
+      \ contains=@vimSubstList
+
+syn match	vimFunctionBang	contained	"\a\@1<=!"	skipwhite nextgroup=vimFunctionName
+syn match	vimDefBang	contained	"\a\@1<=!"	skipwhite nextgroup=vimDefName
+syn match	vimFunctionSID	contained	"\c<sid>"
+syn match	vimFunctionScope	contained	"\<[bwglstav]:"
+syn match	vimFunctionName	contained
+      \ "\%(<[sS][iI][dD]>\|[bwglstav]:\)\=\%([[:alnum:]_#.]\+\|{.\{-1,}}\)\+"
+      \ skipwhite nextgroup=vimFunctionParams,vimCmdSep,vimComment,vim9Comment
+      \ contains=vimFunctionError,vimFunctionScope,vimFunctionSID,Tag
+syn match	vimDefName	contained
+      \ "\%(<[sS][iI][dD]>\|[bwglstav]:\)\=\%([[:alnum:]_#.]\+\|{.\{-1,}}\)\+"
+      \ nextgroup=vimDefParams,vimCmdSep,vimComment,vim9Comment
+      \ contains=vimFunctionError,vimFunctionScope,vimFunctionSID,Tag
+
+syn match	vimFunction	"\<fu\%[nction]\>"	skipwhite nextgroup=vimFunctionBang,vimFunctionName,vimFunctionPattern,vimCmdSep,vimComment
+syn match	vimDef	"\<def\>"		skipwhite nextgroup=vimDefBang,vimDefName,vimFunctionPattern,vimCmdSep,vimComment
+
+syn region	vimFunctionComment	contained
+      \ start=+".*+
+      \ skip=+\n\s*\%(\\\|"\\ \)+
+      \ end="$"
+      \ skipwhite skipempty nextgroup=vimFunctionBody,vimEndfunction
 syn region	vimDefComment	contained
       \ start="#.*"
-      \ skip=+\n\s*\\\|\n\s*#\\ +
+      \ skip=+\n\s*\%(\\\|#\\ \)+
       \ end="$"
       \ skipwhite skipempty nextgroup=vimDefBody,vimEnddef
 
-syn match	vimFuncBang	contained	"!"
-syn match	vimFuncSID	contained	"\c<sid>"
-syn match	vimFuncScope	contained	"\<[sg]:"
-syn keyword	vimFuncKey	contained	fu[nction]
-syn keyword	vimDefKey	contained	def
+syn region	vimFunctionParams	contained
+      \ matchgroup=Delimiter
+      \ start="("
+      \ skip=+\n\s*\%(\\\|"\\ \)+
+      \ end=")"
+      \ skipwhite skipempty nextgroup=vimFunctionBody,vimFunctionComment,vimEndfunction,vimFunctionMod,vim9CommentError
+      \ contains=vimFunctionParam,vimOperParen,@vimContinue
+syn region	vimDefParams	contained
+      \ matchgroup=Delimiter
+      \ start="("
+      \ end=")"
+      \ skipwhite skipempty nextgroup=vimDefBody,vimDefComment,vimEnddef,vimReturnType,vimCommentError
+      \ contains=vimDefParam,vim9Comment,vimFunctionParamEquals,vimOperParen
+syn match	vimFunctionParam	contained	"\<\h\w*\>\|\.\.\."	skipwhite nextgroup=vimFunctionParamEquals
+syn match	vimDefParam	contained	"\<\h\w*\>"		skipwhite nextgroup=vimParamType,vimFunctionParamEquals
 
-syn region	vimFuncParams	contained	matchgroup=Delimiter start="(" skip=+\n\s*\\\|\n\s*"\\ + end=")" skipwhite skipempty nextgroup=vimFuncBody,vimFuncComment,vimEndfunction,vimFuncMod,vim9CommentError	contains=vimFuncParam,vimOperParen,@vimContinue
-syn region	vimDefParams	contained	matchgroup=Delimiter start="("		   end=")" skipwhite skipempty nextgroup=vimDefBody,vimDefComment,vimEnddef,vimReturnType,vimCommentError	contains=vimDefParam,vim9Comment,vimFuncParamEquals,vimOperParen
-syn match	vimFuncParam	contained	"\<\h\w*\>\|\.\.\."	skipwhite nextgroup=vimFuncParamEquals
-syn match	vimDefParam	contained	"\<\h\w*\>"		skipwhite nextgroup=vimParamType,vimFuncParamEquals
+syn match	vimFunctionParamEquals contained	"="			skipwhite	  nextgroup=@vimExprList
+syn match	vimFunctionMod	     contained	"\<\%(abort\|closure\|dict\|range\)\>"	skipwhite skipempty nextgroup=vimFunctionBody,vimFunctionComment,vimEndfunction,vimFunctionMod,vim9CommentError
 
-syn match	vimFuncParamEquals contained	"="			skipwhite           nextgroup=@vimExprList
-syn match	vimFuncMod	 contained	"\<\%(abort\|closure\|dict\|range\)\>"	skipwhite skipempty nextgroup=vimFuncBody,vimFuncComment,vimEndfunction,vimFuncMod,vim9CommentError
+syn region	vimFunctionBody	contained
+      \ start="^."
+      \ matchgroup=vimCommand
+      \ end="\<endfu\%[nction]\>"
+      \ skipwhite nextgroup=vimCmdSep,vimComment,vim9CommentError
+      \ contains=@vimFunctionBodyList
+syn region	vimDefBody	contained
+      \ start="^."
+      \ matchgroup=vimCommand
+      \ end="\<enddef\>"
+      \ skipwhite nextgroup=vimCmdSep,vim9Comment,vimCommentError
+      \ contains=@vimDefBodyList
 
-syn region	vimFuncBody	contained	start="^." matchgroup=vimCmdSep start="|" matchgroup=vimCommand end="\<endfu\%[nction]\>"	contains=@vimFuncBodyList skipwhite nextgroup=vimCmdSep,vimComment,vim9CommentError
-syn region	vimDefBody	contained	start="^." matchgroup=vimCmdSep start="|" matchgroup=vimCommand end="\<enddef\>"	contains=@vimDefBodyList  skipwhite nextgroup=vimCmdSep,vim9Comment,vimCommentError
-
-syn match	vimEndfunction	"\<endf\%[unction]\>" skipwhite nextgroup=vimCmdSep,vimComment,vim9CommentError
-syn match	vimEnddef	"\<enddef\>"	    skipwhite nextgroup=vimCmdSep,vim9Comment,vimCommentError
+syn match	vimEndfunction	"\<endf\%[unction]\>"	skipwhite nextgroup=vimCmdSep,vimComment,vim9CommentError
+syn match	vimEnddef	"\<enddef\>"		skipwhite nextgroup=vimCmdSep,vim9Comment,vimCommentError
 
 if exists("g:vimsyn_folding") && g:vimsyn_folding =~# 'f'
- syn region	vimFuncFold	start="\<fu\%[nction]\>!\=\s*\%(<[sS][iI][dD]>\|[sg]:\)\=\%(\i\|[#.]\|{.\{-1,}}\)\+\s*(" end="\<endf\%[unction]\>" contains=vimFunction fold keepend extend transparent
- syn region	vimDefFold	start="\<def\>!\=\s*\%(<[sS][iI][dD]>\|[sg]:\)\=\%(\i\|[#.]\)\+("	                 end="\<enddef\>"	       contains=vimDef      fold keepend extend transparent
+  syn region	vimFunctionFold
+        \ start="\<fu\%[nction]!"
+        "\ assume no dict literal in curly-brace name expressions
+        \ start="\<fu\%[nction]\>\s*\%([[:alnum:]_:<>.#]\+\|{.\{-1,}}\)\+\s*("
+        \ end="^\s*:\=\s*endf\%[unction]\>"
+        \ contains=vimFunction
+        \ extend fold keepend transparent
+  syn region	vimDefFold
+        \ start="\<def!"
+        "\ assume no dict literal in curly-brace name expressions
+        \ start="\<def\>\s*\%([[:alnum:]_:<>.#]\+\|{.\{-1,}}\)\+("
+        \ end="^\s*:\=\s*enddef\>"
+        \ contains=vimDef
+        \ extend fold keepend transparent
 endif
 
+syn match	vimDelfunctionBang	contained	"\a\@1<=!"		skipwhite nextgroup=vimFunctionName
+syn match	vimDelfunction			"\<delf\%[unction]\>"	skipwhite nextgroup=vimDelfunctionBang,vimFunctionName
+
 " Types: {{{2
 " =====
 
@@ -578,18 +620,18 @@
   syn region	vim9MethodDefParams	contained
         \ matchgroup=Delimiter start="(" end=")"
         \ skipwhite skipnl nextgroup=vim9MethodDefBody,vim9MethodDefComment,vimEnddef,vim9MethodDefReturnType,vimCommentError
-        \ contains=vimDefParam,vim9Comment,vimFuncParamEquals
+        \ contains=vimDefParam,vim9Comment,vimFunctionParamEquals
 
   syn match	vim9ConstructorDefName	contained	"\<_\=new\w*\>"
         \ nextgroup=vim9ConstructorDefParams
         \ contains=@vim9MethodName
   syn match	vim9ConstructorDefParam	contained	"\<\%(this\.\)\=\h\w*\>"
-        \ skipwhite nextgroup=vimParamType,vimFuncParamEquals
+        \ skipwhite nextgroup=vimParamType,vimFunctionParamEquals
         \ contains=vim9This,vimOper
   syn region	vim9ConstructorDefParams	contained
         \ matchgroup=Delimiter start="(" end=")"
         \ skipwhite skipnl nextgroup=vim9MethodDefBody,vim9MethodDefComment,vimEnddef,vimCommentError
-        \ contains=vim9ConstructorDefParam,vim9Comment,vimFuncParamEquals
+        \ contains=vim9ConstructorDefParam,vim9Comment,vimFunctionParamEquals
 
   syn region	vim9MethodDefReturnType	contained
         \ start=":\%(\s\|\n\)\@="
@@ -708,7 +750,7 @@
   syn region	vim9AbstractDefParams	contained
         \ matchgroup=Delimiter start="(" end=")"
         \ skipwhite skipnl nextgroup=vimDefComment,vim9AbstractDefReturnType,vimCommentError
-        \ contains=vimDefParam,vim9Comment,vimFuncParamEquals
+        \ contains=vimDefParam,vim9Comment,vimFunctionParamEquals
   syn region	vim9AbstractDefReturnType	contained
         \ start=":\s" end="$" matchgroup=vim9Comment end="\ze[#"]"
         \ skipwhite skipnl nextgroup=vimDefComment,vimCommentError
@@ -805,7 +847,7 @@
 syn keyword vimUserCmdAttrComplete contained arglist augroup behave breakpoint buffer color command compiler cscope diff_buffer dir dir_in_path environment event expression file file_in_path filetype filetypecmd function help highlight history keymap locale mapclear mapping menu messages option packadd runtime scriptnames shellcmd shellcmdline sign syntax syntime tag tag_listfiles user var
 syn keyword vimUserCmdAttrComplete contained arglist augroup behave breakpoint buffer color command compiler cscope diff_buffer dir dir_in_path environment event expression file file_in_path filetype function help highlight history keymap locale mapclear mapping menu messages option packadd runtime scriptnames shellcmd shellcmdline sign syntax syntime tag tag_listfiles user var
 syn keyword	vimUserCmdAttrComplete	contained	custom customlist nextgroup=vimUserCmdAttrCompleteFunc,vimUserCmdError
-syn match	vimUserCmdAttrCompleteFunc	contained	",\%([bwglstav]:\|<[sS][iI][dD]>\)\=\h\w*\%([.#]\h\w*\)*"hs=s+1 nextgroup=vimUserCmdError contains=vimVarScope,vimFuncSID
+syn match	vimUserCmdAttrCompleteFunc	contained	",\%([bwglstav]:\|<[sS][iI][dD]>\)\=\h\w*\%([.#]\h\w*\)*"hs=s+1 nextgroup=vimUserCmdError contains=vimVarScope,vimFunctionSID
 
 " GEN_SYN_VIM: vimUserCmdAttrAddr, START_STR='syn keyword vimUserCmdAttrAddr contained', END_STR=''
 syn keyword vimUserCmdAttrAddr contained arguments arg buffers buf lines line loaded_buffers load other quickfix qf tabs tab windows win
@@ -1439,8 +1481,8 @@
 " Errors And Warnings: {{{2
 " ====================
 if !exists("g:vimsyn_noerror") && !exists("g:vimsyn_novimfunctionerror")
- syn match	vimFunctionError	"\s\zs[a-z0-9]\i\{-}\ze\s*("			contained contains=vimFuncKey,vimFuncBlank
- syn match	vimFunctionError	"\s\zs\%(<[sS][iI][dD]>\|[sSgGbBwWtTlL]:\)\d\i\{-}\ze\s*("	contained contains=vimFuncKey,vimFuncBlank
+ syn match	vimFunctionError	contained	"[[:space:]!]\@1<=\<[a-z0-9]\w\{-}\ze\s*("
+ syn match	vimFunctionError	contained	"\%(<[sS][iI][dD]>\|[sg]:\)\d\w\{-}\ze\s*("
  syn match	vimElseIfErr	"\<else\s\+if\>"
  syn match	vimBufnrWarn	/\<bufnr\s*(\s*["']\.['"]\s*)/
 endif
@@ -1547,7 +1589,7 @@
 endif
 
 syn match	vimSyntax	"\<sy\%[ntax]\>"	contains=vimCommand skipwhite nextgroup=vimSynType,@vimComment
-syn cluster vimFuncBodyList add=vimSyntax
+syn cluster vimFunctionBodyList add=vimSyntax
 
 " Syntax: case {{{2
 syn keyword	vimSynType	contained	case	skipwhite nextgroup=vimSynCase,vimSynCaseError
@@ -2173,11 +2215,14 @@
  hi def link vimCount	Number
  hi def link vimCtrlChar	SpecialChar
  hi def link vimDebuggreedy	vimCommand
+ hi def link vimDef	vimCommand
+ hi def link vimDefBang	vimBang
  hi def link vimDefComment	vim9Comment
- hi def link vimDefKey	vimCommand
  hi def link vimDefParam	vimVar
  hi def link vimDelcommand	vimCommand
  hi def link vimDelcommandAttr	vimUserCmdAttr
+ hi def link vimDelfunction	vimCommand
+ hi def link vimDelfunctionBang	vimBang
  hi def link vimDoautocmd	vimCommand
  hi def link vimDoautocmdMod	Special
  hi def link vimEcho	vimCommand
@@ -2202,15 +2247,15 @@
  hi def link vimForInContinueComment	vimContinueComment
  hi def link vimFTCmd	vimCommand
  hi def link vimFTOption	vimSynType
- hi def link vimFuncBang	vimBang
- hi def link vimFuncComment	vimComment
- hi def link vimFuncKey	vimCommand
+ hi def link vimFunction	vimCommand
+ hi def link vimFunctionBang	vimBang
+ hi def link vimFunctionComment	vimComment
  hi def link vimFuncName	Function
- hi def link vimFuncMod	Special
- hi def link vimFuncParam	vimVar
- hi def link vimFuncParamEquals	vimOper
- hi def link vimFuncScope	vimVarScope
- hi def link vimFuncSID	vimNotation
+ hi def link vimFunctionMod	Special
+ hi def link vimFunctionParam	vimVar
+ hi def link vimFunctionParamEquals	vimOper
+ hi def link vimFunctionScope	vimVarScope
+ hi def link vimFunctionSID	vimNotation
  hi def link vimGrep	vimCommand
  hi def link vimGrepadd	vimCommand
  hi def link vimGrepBang	vimBang
@@ -2261,7 +2306,7 @@
  hi def link vimMapBang	vimBang
  hi def link vimMapLeader	vimBracket
  hi def link vimMapLeaderKey	vimNotation
- hi def link vimMapModKey	vimFuncSID
+ hi def link vimMapModKey	vimFunctionSID
  hi def link vimMapMod	vimBracket
  hi def link vimMap	vimCommand
  hi def link vimMark	Number