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" Vim syntax file
" Language:      Perl 5
" Maintainer:    vim-perl <vim-perl@googlegroups.com>
" Homepage:      http://github.com/vim-perl/vim-perl/tree/master
" Bugs/requests: http://github.com/vim-perl/vim-perl/issues
" Last Change:   2017-09-12
" Contributors:  Andy Lester <andy@petdance.com>
"                Hinrik Örn Sigurðsson <hinrik.sig@gmail.com>
"                Lukas Mai <l.mai.web.de>
"                Nick Hibma <nick@van-laarhoven.org>
"                Sonia Heimann <niania@netsurf.org>
"                Rob Hoelz <rob@hoelz.ro>
"                and many others.
"
" Please download the most recent version first, before mailing
" any comments.
"
" The following parameters are available for tuning the
" perl syntax highlighting, with defaults given:
"
" let perl_include_pod = 1
" unlet perl_no_scope_in_variables
" unlet perl_no_extended_vars
" unlet perl_string_as_statement
" unlet perl_no_sync_on_sub
" unlet perl_no_sync_on_global_var
" let perl_sync_dist = 100
" unlet perl_fold
" unlet perl_fold_blocks
" unlet perl_nofold_packages
" unlet perl_nofold_subs
" unlet perl_fold_anonymous_subs
" unlet perl_no_subprototype_error

if exists("b:current_syntax")
  finish
endif

let s:cpo_save = &cpo
set cpo&vim

" POD starts with ^=<word> and ends with ^=cut

if !exists("perl_include_pod") || perl_include_pod == 1
  " Include a while extra syntax file
  syn include @Pod syntax/pod.vim
  unlet b:current_syntax
  if exists("perl_fold")
    syn region perlPOD start="^=[a-z]" end="^=cut" contains=@Pod,@Spell,perlTodo keepend fold extend
    syn region perlPOD start="^=cut" end="^=cut" contains=perlTodo keepend fold extend
  else
    syn region perlPOD start="^=[a-z]" end="^=cut" contains=@Pod,@Spell,perlTodo keepend
    syn region perlPOD start="^=cut" end="^=cut" contains=perlTodo keepend
  endif
else
  " Use only the bare minimum of rules
  if exists("perl_fold")
    syn region perlPOD start="^=[a-z]" end="^=cut" fold
  else
    syn region perlPOD start="^=[a-z]" end="^=cut"
  endif
endif

syn cluster perlTop		contains=TOP

syn region perlBraces start="{" end="}" transparent extend

syn keyword perlTodo			TODO TODO: TBD TBD: FIXME FIXME: XXX XXX: NOTE NOTE: contained

syn region perlStatementIndirObjWrap   matchgroup=perlStatementIndirObj start="\%(\<\%(map\|grep\|sort\|printf\=\|say\|system\|exec\)\>\s*\)\@<={" end="}" transparent extend

syn match perlLabel      "^\s*\h\w*\s*::\@!\%(\<v\d\+\s*:\)\@<!"

" Perl Identifiers.
"
" Should be cleaned up to better handle identifiers in particular situations
" (in hash keys for example)
"
" Plain identifiers: $foo, @foo, $#foo, %foo, &foo and dereferences $$foo, @$foo, etc.
" We do not process complex things such as @{${"foo"}}. Too complicated, and
" too slow. And what is after the -> is *not* considered as part of the
" variable - there again, too complicated and too slow.

" Special variables first ($^A, ...) and ($|, $', ...)
syn match  perlVarPlain		 "$^[ACDEFHILMNOPRSTVWX]\="
syn match  perlVarPlain		 "$[\\\"\[\]'&`+*.,;=%~!?@#$<>(-]"
syn match  perlVarPlain		 "@[-+]"
syn match  perlVarPlain		 "$\%(0\|[1-9]\d*\)"
" Same as above, but avoids confusion in $::foo (equivalent to $main::foo)
syn match  perlVarPlain		 "$::\@!"
" These variables are not recognized within matches.
syn match  perlVarNotInMatches	 "$[|)]"
" This variable is not recognized within matches delimited by m//.
syn match  perlVarSlash		 "$/"

" And plain identifiers
syn match  perlPackageRef	 "[$@#%*&]\%(\%(::\|'\)\=\I\i*\%(\%(::\|'\)\I\i*\)*\)\=\%(::\|'\)\I"ms=s+1,me=e-1 contained

" To not highlight packages in variables as a scope reference - i.e. in
" $pack::var, pack:: is a scope, just set "perl_no_scope_in_variables"
" If you don't want complex things like @{${"foo"}} to be processed,
" just set the variable "perl_no_extended_vars"...

if !exists("perl_no_scope_in_variables")
  syn match  perlVarPlain       "\%([@$]\|\$#\)\$*\%(\I\i*\)\=\%(\%(::\|'\)\I\i*\)*\%(::\|\i\@<=\)" contains=perlPackageRef nextgroup=perlVarMember,perlVarSimpleMember,perlMethod,perlPostDeref
  syn match  perlVarPlain2                   "%\$*\%(\I\i*\)\=\%(\%(::\|'\)\I\i*\)*\%(::\|\i\@<=\)" contains=perlPackageRef nextgroup=perlVarMember,perlVarSimpleMember,perlMethod,perlPostDeref
  syn match  perlFunctionName                "&\$*\%(\I\i*\)\=\%(\%(::\|'\)\I\i*\)*\%(::\|\i\@<=\)" contains=perlPackageRef nextgroup=perlVarMember,perlVarSimpleMember,perlMethod,perlPostDeref
else
  syn match  perlVarPlain       "\%([@$]\|\$#\)\$*\%(\I\i*\)\=\%(\%(::\|'\)\I\i*\)*\%(::\|\i\@<=\)" nextgroup=perlVarMember,perlVarSimpleMember,perlMethod,perlPostDeref
  syn match  perlVarPlain2                   "%\$*\%(\I\i*\)\=\%(\%(::\|'\)\I\i*\)*\%(::\|\i\@<=\)" nextgroup=perlVarMember,perlVarSimpleMember,perlMethod,perlPostDeref
  syn match  perlFunctionName                "&\$*\%(\I\i*\)\=\%(\%(::\|'\)\I\i*\)*\%(::\|\i\@<=\)" nextgroup=perlVarMember,perlVarSimpleMember,perlMethod,perlPostDeref
endif

syn match  perlVarPlain2	 "%[-+]"

if !exists("perl_no_extended_vars")
  syn cluster perlExpr		contains=perlStatementIndirObjWrap,perlStatementScalar,perlStatementRegexp,perlStatementNumeric,perlStatementList,perlStatementHash,perlStatementFiles,perlStatementTime,perlStatementMisc,perlVarPlain,perlVarPlain2,perlVarNotInMatches,perlVarSlash,perlVarBlock,perlVarBlock2,perlShellCommand,perlFloat,perlNumber,perlStringUnexpanded,perlString,perlQQ,perlArrow,perlBraces
  syn region perlArrow		matchgroup=perlArrow start="->\s*(" end=")" contains=@perlExpr nextgroup=perlVarMember,perlVarSimpleMember,perlMethod,perlPostDeref contained
  syn region perlArrow		matchgroup=perlArrow start="->\s*\[" end="\]" contains=@perlExpr nextgroup=perlVarMember,perlVarSimpleMember,perlMethod,perlPostDeref contained
  syn region perlArrow		matchgroup=perlArrow start="->\s*{" end="}" contains=@perlExpr nextgroup=perlVarMember,perlVarSimpleMember,perlMethod,perlPostDeref contained
  syn match  perlArrow		"->\s*{\s*\I\i*\s*}" contains=perlVarSimpleMemberName nextgroup=perlVarMember,perlVarSimpleMember,perlMethod,perlPostDeref contained
  syn region perlArrow		matchgroup=perlArrow start="->\s*\$*\I\i*\s*(" end=")" contains=@perlExpr nextgroup=perlVarMember,perlVarSimpleMember,perlMethod,perlPostDeref contained
  syn region perlVarBlock	matchgroup=perlVarPlain start="\%($#\|[$@]\)\$*{" skip="\\}" end=+}\|\%(\%(<<\%('\|"\)\?\)\@=\)+ contains=@perlExpr nextgroup=perlVarMember,perlVarSimpleMember,perlMethod,perlPostDeref extend
  syn region perlVarBlock2	matchgroup=perlVarPlain start="[%&*]\$*{" skip="\\}" end=+}\|\%(\%(<<\%('\|"\)\?\)\@=\)+ contains=@perlExpr nextgroup=perlVarMember,perlVarSimpleMember,perlMethod,perlPostDeref extend
  syn match  perlVarPlain2	"[%&*]\$*{\I\i*}" nextgroup=perlVarMember,perlVarSimpleMember,perlMethod,perlPostDeref extend
  syn match  perlVarPlain	"\%(\$#\|[@$]\)\$*{\I\i*}" nextgroup=perlVarMember,perlVarSimpleMember,perlMethod,perlPostDeref extend
  syn region perlVarMember	matchgroup=perlVarPlain start="\%(->\)\={" skip="\\}" end="}" contained contains=@perlExpr nextgroup=perlVarMember,perlVarSimpleMember,perlMethod,perlPostDeref extend
  syn match  perlVarSimpleMember	"\%(->\)\={\s*\I\i*\s*}" nextgroup=perlVarMember,perlVarSimpleMember,perlMethod,perlPostDeref contains=perlVarSimpleMemberName contained extend
  syn match  perlVarSimpleMemberName	"\I\i*" contained
  syn region perlVarMember	matchgroup=perlVarPlain start="\%(->\)\=\[" skip="\\]" end="]" contained contains=@perlExpr nextgroup=perlVarMember,perlVarSimpleMember,perlMethod,perlPostDeref extend
  syn match perlPackageConst	"__PACKAGE__" nextgroup=perlMethod,perlPostDeref
  syn match  perlMethod		"->\$*\I\i*" contained nextgroup=perlVarSimpleMember,perlVarMember,perlMethod,perlPostDeref
  syn match  perlPostDeref	"->\%($#\|[$@%&*]\)\*" contained nextgroup=perlVarSimpleMember,perlVarMember,perlMethod,perlPostDeref
  syn region  perlPostDeref	start="->\%($#\|[$@%&*]\)\[" skip="\\]" end="]" contained contains=@perlExpr nextgroup=perlVarSimpleMember,perlVarMember,perlMethod,perlPostDeref
  syn region  perlPostDeref	matchgroup=perlPostDeref start="->\%($#\|[$@%&*]\){" skip="\\}" end="}" contained contains=@perlExpr nextgroup=perlVarSimpleMember,perlVarMember,perlMethod,perlPostDeref
endif

" File Descriptors
syn match  perlFiledescRead	"<\h\w*>"

syn match  perlFiledescStatementComma	"(\=\s*\<\u\w*\>\s*,"me=e-1 transparent contained contains=perlFiledescStatement
syn match  perlFiledescStatementNocomma "(\=\s*\<\u\w*\>\s*[^, \t]"me=e-1 transparent contained contains=perlFiledescStatement

syn match  perlFiledescStatement	"\<\u\w*\>" contained

" Special characters in strings and matches
syn match  perlSpecialString	"\\\%(\o\{1,3}\|x\%({\x\+}\|\x\{1,2}\)\|c.\|[^cx]\)" contained extend
syn match  perlSpecialStringU2	"\\." extend contained contains=NONE
syn match  perlSpecialStringU	"\\\\" contained
syn match  perlSpecialMatch	"\\[1-9]" contained extend
syn match  perlSpecialMatch	"\\g\%(\d\+\|{\%(-\=\d\+\|\h\w*\)}\)" contained
syn match  perlSpecialMatch	"\\k\%(<\h\w*>\|'\h\w*'\)" contained
syn match  perlSpecialMatch	"{\d\+\%(,\%(\d\+\)\=\)\=}" contained
syn match  perlSpecialMatch	"\[[]-]\=[^\[\]]*[]-]\=\]" contained extend
syn match  perlSpecialMatch	"[+*()?.]" contained
syn match  perlSpecialMatch	"(?[#:=!]" contained
syn match  perlSpecialMatch	"(?[impsx]*\%(-[imsx]\+\)\=)" contained
syn match  perlSpecialMatch	"(?\%([-+]\=\d\+\|R\))" contained
syn match  perlSpecialMatch	"(?\%(&\|P[>=]\)\h\w*)" contained
syn match  perlSpecialMatch	"(\*\%(\%(PRUNE\|SKIP\|THEN\)\%(:[^)]*\)\=\|\%(MARK\|\):[^)]*\|COMMIT\|F\%(AIL\)\=\|ACCEPT\))" contained

" Possible errors
"
" Highlight lines with only whitespace (only in blank delimited here documents) as errors
syn match  perlNotEmptyLine	"^\s\+$" contained
" Highlight "} else if (...) {", it should be "} else { if (...) { " or "} elsif (...) {"
syn match perlElseIfError	"else\_s*if" containedin=perlConditional
syn keyword perlElseIfError	elseif containedin=perlConditional

" Variable interpolation
"
" These items are interpolated inside "" strings and similar constructs.
syn cluster perlInterpDQ	contains=perlSpecialString,perlVarPlain,perlVarNotInMatches,perlVarSlash,perlVarBlock
" These items are interpolated inside '' strings and similar constructs.
syn cluster perlInterpSQ	contains=perlSpecialStringU,perlSpecialStringU2
" These items are interpolated inside m// matches and s/// substitutions.
syn cluster perlInterpSlash	contains=perlSpecialString,perlSpecialMatch,perlVarPlain,perlVarBlock
" These items are interpolated inside m## matches and s### substitutions.
syn cluster perlInterpMatch	contains=@perlInterpSlash,perlVarSlash

" Shell commands
syn region  perlShellCommand	matchgroup=perlMatchStartEnd start="`" end="`" contains=@perlInterpDQ keepend

" Constants
"
" Numbers
syn match  perlNumber	"\<\%(0\%(x\x[[:xdigit:]_]*\|b[01][01_]*\|\o[0-7_]*\|\)\|[1-9][[:digit:]_]*\)\>"
syn match  perlFloat	"\<\d[[:digit:]_]*[eE][\-+]\=\d\+"
syn match  perlFloat	"\<\d[[:digit:]_]*\.[[:digit:]_]*\%([eE][\-+]\=\d\+\)\="
syn match  perlFloat    "\.[[:digit:]][[:digit:]_]*\%([eE][\-+]\=\d\+\)\="

syn match  perlString	"\<\%(v\d\+\%(\.\d\+\)*\|\d\+\%(\.\d\+\)\{2,}\)\>" contains=perlVStringV
syn match  perlVStringV	"\<v" contained

syn region perlParensSQ		start=+(+ end=+)+ extend contained contains=perlParensSQ,@perlInterpSQ keepend
syn region perlBracketsSQ	start=+\[+ end=+\]+ extend contained contains=perlBracketsSQ,@perlInterpSQ keepend
syn region perlBracesSQ		start=+{+ end=+}+ extend contained contains=perlBracesSQ,@perlInterpSQ keepend
syn region perlAnglesSQ		start=+<+ end=+>+ extend contained contains=perlAnglesSQ,@perlInterpSQ keepend

syn region perlParensDQ		start=+(+ end=+)+ extend contained contains=perlParensDQ,@perlInterpDQ keepend
syn region perlBracketsDQ	start=+\[+ end=+\]+ extend contained contains=perlBracketsDQ,@perlInterpDQ keepend
syn region perlBracesDQ		start=+{+ end=+}+ extend contained contains=perlBracesDQ,@perlInterpDQ keepend
syn region perlAnglesDQ		start=+<+ end=+>+ extend contained contains=perlAnglesDQ,@perlInterpDQ keepend

" Simple version of searches and matches
syn region perlMatch	matchgroup=perlMatchStartEnd start=+\<\%(::\|'\|->\)\@<!m\>\s*\z([^[:space:]'([{<#]\)+ end=+\z1[msixpodualgcn]*+ contains=@perlInterpMatch keepend extend
syn region perlMatch	matchgroup=perlMatchStartEnd start=+\<\%(::\|'\|->\)\@<!m#+ end=+#[msixpodualgcn]*+ contains=@perlInterpMatch keepend extend
syn region perlMatch	matchgroup=perlMatchStartEnd start=+\<\%(::\|'\|->\)\@<!m\s*'+ end=+'[msixpodualgcn]*+ contains=@perlInterpSQ keepend extend
syn region perlMatch	matchgroup=perlMatchStartEnd start=+\<\%(::\|'\|->\)\@<!m\s*/+ end=+/[msixpodualgcn]*+ contains=@perlInterpSlash keepend extend
syn region perlMatch	matchgroup=perlMatchStartEnd start=+\<\%(::\|'\|->\)\@<!m\s*(+ end=+)[msixpodualgcn]*+ contains=@perlInterpMatch,perlParensDQ keepend extend
syn region perlMatch	matchgroup=perlMatchStartEnd start=+\<\%(::\|'\|->\)\@<!m\s*{+ end=+}[msixpodualgcn]*+ contains=@perlInterpMatch,perlBracesDQ extend
syn region perlMatch	matchgroup=perlMatchStartEnd start=+\<\%(::\|'\|->\)\@<!m\s*<+ end=+>[msixpodualgcn]*+ contains=@perlInterpMatch,perlAnglesDQ keepend extend
syn region perlMatch	matchgroup=perlMatchStartEnd start=+\<\%(::\|'\|->\)\@<!m\s*\[+ end=+\][msixpodualgcn]*+ contains=@perlInterpMatch,perlBracketsDQ keepend extend

" Below some hacks to recognise the // variant. This is virtually impossible to catch in all
" cases as the / is used in so many other ways, but these should be the most obvious ones.
syn region perlMatch	matchgroup=perlMatchStartEnd start="\%([$@%&*]\@<!\%(\<split\|\<while\|\<if\|\<unless\|\.\.\|[-+*!~(\[{=]\)\s*\)\@<=/\%(/=\)\@!" start=+^/\%(/=\)\@!+ start=+\s\@<=/\%(/=\)\@![^[:space:][:digit:]$@%=]\@=\%(/\_s*\%([([{$@%&*[:digit:]"'`]\|\_s\w\|[[:upper:]_abd-fhjklnqrt-wyz]\)\)\@!+ skip=+\\/+ end=+/[msixpodualgcn]*+ contains=@perlInterpSlash extend

" Substitutions
" perlMatch is the first part, perlSubstitution* is the substitution part
syn region perlMatch	matchgroup=perlMatchStartEnd start=+\<\%(::\|'\|->\)\@<!s\>\s*\z([^[:space:]'([{<#]\)+ end=+\z1+me=e-1 contains=@perlInterpMatch nextgroup=perlSubstitutionGQQ keepend extend
syn region perlMatch	matchgroup=perlMatchStartEnd start=+\<\%(::\|'\|->\)\@<!s\s*'+  end=+'+me=e-1 contains=@perlInterpSQ nextgroup=perlSubstitutionSQ keepend extend
syn region perlMatch	matchgroup=perlMatchStartEnd start=+\<\%(::\|'\|->\)\@<!s\s*/+  end=+/+me=e-1 contains=@perlInterpSlash nextgroup=perlSubstitutionGQQ keepend extend
syn region perlMatch	matchgroup=perlMatchStartEnd start=+\<\%(::\|'\|->\)\@<!s#+  end=+#+me=e-1 contains=@perlInterpMatch nextgroup=perlSubstitutionGQQ keepend extend
syn region perlMatch	matchgroup=perlMatchStartEnd start=+\<\%(::\|'\|->\)\@<!s\s*(+ end=+)+ contains=@perlInterpMatch,perlParensDQ nextgroup=perlSubstitutionGQQ skipwhite skipempty skipnl keepend extend
syn region perlMatch	matchgroup=perlMatchStartEnd start=+\<\%(::\|'\|->\)\@<!s\s*<+ end=+>+ contains=@perlInterpMatch,perlAnglesDQ nextgroup=perlSubstitutionGQQ skipwhite skipempty skipnl keepend extend
syn region perlMatch	matchgroup=perlMatchStartEnd start=+\<\%(::\|'\|->\)\@<!s\s*\[+ end=+\]+ contains=@perlInterpMatch,perlBracketsDQ nextgroup=perlSubstitutionGQQ skipwhite skipempty skipnl keepend extend
syn region perlMatch	matchgroup=perlMatchStartEnd start=+\<\%(::\|'\|->\)\@<!s\s*{+ end=+}+ contains=@perlInterpMatch,perlBracesDQ nextgroup=perlSubstitutionGQQ skipwhite skipempty skipnl keepend extend
syn region perlSubstitutionGQQ		matchgroup=perlMatchStartEnd start=+\z([^[:space:]'([{<]\)+ end=+\z1[msixpodualgcern]*+ keepend contained contains=@perlInterpDQ extend
syn region perlSubstitutionGQQ		matchgroup=perlMatchStartEnd start=+(+ end=+)[msixpodualgcern]*+ contained contains=@perlInterpDQ,perlParensDQ keepend extend
syn region perlSubstitutionGQQ		matchgroup=perlMatchStartEnd start=+\[+ end=+\][msixpodualgcern]*+ contained contains=@perlInterpDQ,perlBracketsDQ keepend extend
syn region perlSubstitutionGQQ		matchgroup=perlMatchStartEnd start=+{+ end=+}[msixpodualgcern]*+ contained contains=@perlInterpDQ,perlBracesDQ keepend extend extend
syn region perlSubstitutionGQQ		matchgroup=perlMatchStartEnd start=+<+ end=+>[msixpodualgcern]*+ contained contains=@perlInterpDQ,perlAnglesDQ keepend extend
syn region perlSubstitutionSQ		matchgroup=perlMatchStartEnd start=+'+  end=+'[msixpodualgcern]*+ contained contains=@perlInterpSQ keepend extend

" Translations
" perlMatch is the first part, perlTranslation* is the second, translator part.
syn region perlMatch	matchgroup=perlMatchStartEnd start=+\<\%(::\|'\|->\)\@<!\%(tr\|y\)\>\s*\z([^[:space:]([{<#]\)+ end=+\z1+me=e-1 contains=@perlInterpSQ nextgroup=perlTranslationGQ
syn region perlMatch	matchgroup=perlMatchStartEnd start=+\<\%(::\|'\|->\)\@<!\%(tr\|y\)#+ end=+#+me=e-1 contains=@perlInterpSQ nextgroup=perlTranslationGQ
syn region perlMatch	matchgroup=perlMatchStartEnd start=+\<\%(::\|'\|->\)\@<!\%(tr\|y\)\s*\[+ end=+\]+ contains=@perlInterpSQ,perlBracketsSQ nextgroup=perlTranslationGQ skipwhite skipempty skipnl
syn region perlMatch	matchgroup=perlMatchStartEnd start=+\<\%(::\|'\|->\)\@<!\%(tr\|y\)\s*(+ end=+)+ contains=@perlInterpSQ,perlParensSQ nextgroup=perlTranslationGQ skipwhite skipempty skipnl
syn region perlMatch	matchgroup=perlMatchStartEnd start=+\<\%(::\|'\|->\)\@<!\%(tr\|y\)\s*<+ end=+>+ contains=@perlInterpSQ,perlAnglesSQ nextgroup=perlTranslationGQ skipwhite skipempty skipnl
syn region perlMatch	matchgroup=perlMatchStartEnd start=+\<\%(::\|'\|->\)\@<!\%(tr\|y\)\s*{+ end=+}+ contains=@perlInterpSQ,perlBracesSQ nextgroup=perlTranslationGQ skipwhite skipempty skipnl
syn region perlTranslationGQ		matchgroup=perlMatchStartEnd start=+\z([^[:space:]([{<]\)+ end=+\z1[cdsr]*+ contained
syn region perlTranslationGQ		matchgroup=perlMatchStartEnd start=+(+ end=+)[cdsr]*+ contains=perlParensSQ contained
syn region perlTranslationGQ		matchgroup=perlMatchStartEnd start=+\[+ end=+\][cdsr]*+ contains=perlBracketsSQ contained
syn region perlTranslationGQ		matchgroup=perlMatchStartEnd start=+{+ end=+}[cdsr]*+ contains=perlBracesSQ contained
syn region perlTranslationGQ		matchgroup=perlMatchStartEnd start=+<+ end=+>[cdsr]*+ contains=perlAnglesSQ contained

" Strings and q, qq, qw and qr expressions

syn region perlStringUnexpanded	matchgroup=perlStringStartEnd start="'" end="'" contains=@perlInterpSQ keepend extend
syn region perlString		matchgroup=perlStringStartEnd start=+"+  end=+"+ contains=@perlInterpDQ keepend extend
syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!q\>\s*\z([^[:space:]#([{<]\)+ end=+\z1+ contains=@perlInterpSQ keepend extend
syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!q#+ end=+#+ contains=@perlInterpSQ keepend extend
syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!q\s*(+ end=+)+ contains=@perlInterpSQ,perlParensSQ keepend extend
syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!q\s*\[+ end=+\]+ contains=@perlInterpSQ,perlBracketsSQ keepend extend
syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!q\s*{+ end=+}+ contains=@perlInterpSQ,perlBracesSQ keepend extend
syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!q\s*<+ end=+>+ contains=@perlInterpSQ,perlAnglesSQ keepend extend

syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!q[qx]\>\s*\z([^[:space:]#([{<]\)+ end=+\z1+ contains=@perlInterpDQ keepend extend
syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!q[qx]#+ end=+#+ contains=@perlInterpDQ keepend extend
syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!q[qx]\s*(+ end=+)+ contains=@perlInterpDQ,perlParensDQ keepend extend
syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!q[qx]\s*\[+ end=+\]+ contains=@perlInterpDQ,perlBracketsDQ keepend extend
syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!q[qx]\s*{+ end=+}+ contains=@perlInterpDQ,perlBracesDQ keepend extend
syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!q[qx]\s*<+ end=+>+ contains=@perlInterpDQ,perlAnglesDQ keepend extend

syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!qw\s*\z([^[:space:]#([{<]\)+  end=+\z1+ contains=@perlInterpSQ keepend extend
syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!qw#+  end=+#+ contains=@perlInterpSQ keepend extend
syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!qw\s*(+  end=+)+ contains=@perlInterpSQ,perlParensSQ keepend extend
syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!qw\s*\[+  end=+\]+ contains=@perlInterpSQ,perlBracketsSQ keepend extend
syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!qw\s*{+  end=+}+ contains=@perlInterpSQ,perlBracesSQ keepend extend
syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!qw\s*<+  end=+>+ contains=@perlInterpSQ,perlAnglesSQ keepend extend

syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!qr\>\s*\z([^[:space:]#([{<'/]\)+  end=+\z1[imosxdual]*+ contains=@perlInterpMatch keepend extend
syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!qr\s*/+  end=+/[imosxdual]*+ contains=@perlInterpSlash keepend extend
syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!qr#+  end=+#[imosxdual]*+ contains=@perlInterpMatch keepend extend
syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!qr\s*'+  end=+'[imosxdual]*+ contains=@perlInterpSQ keepend extend
syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!qr\s*(+  end=+)[imosxdual]*+ contains=@perlInterpMatch,perlParensDQ keepend extend

" A special case for qr{}, qr<> and qr[] which allows for comments and extra whitespace in the pattern
syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!qr\s*{+  end=+}[imosxdual]*+ contains=@perlInterpMatch,perlBracesDQ,perlComment keepend extend
syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!qr\s*<+  end=+>[imosxdual]*+ contains=@perlInterpMatch,perlAnglesDQ,perlComment keepend extend
syn region perlQQ		matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!qr\s*\[+  end=+\][imosxdual]*+ contains=@perlInterpMatch,perlBracketsDQ,perlComment keepend extend

" Constructs such as print <<EOF [...] EOF, 'here' documents
"
" XXX Any statements after the identifier are in perlString colour (i.e.
" 'if $a' in 'print <<EOF if $a'). This is almost impossible to get right it
" seems due to the 'auto-extending nature' of regions.
syn region perlHereDocStart	matchgroup=perlStringStartEnd start=+<<\z(\I\i*\)+  end=+$+     contains=@perlTop oneline
syn region perlHereDocStart	matchgroup=perlStringStartEnd start=+<<\s*"\z([^\\"]*\%(\\.[^\\"]*\)*\)"+ end=+$+ contains=@perlTop oneline
syn region perlHereDocStart	matchgroup=perlStringStartEnd start=+<<\s*'\z([^\\']*\%(\\.[^\\']*\)*\)'+ end=+$+ contains=@perlTop oneline
syn region perlHereDocStart	matchgroup=perlStringStartEnd start=+<<\s*""+       end=+$+     contains=@perlTop oneline
syn region perlHereDocStart	matchgroup=perlStringStartEnd start=+<<\s*''+       end=+$+     contains=@perlTop oneline
if exists("perl_fold")
  syn region perlHereDoc	start=+<<\z(\I\i*\)+ matchgroup=perlStringStartEnd      end=+^\z1$+ contains=perlHereDocStart,@perlInterpDQ fold extend
  syn region perlHereDoc	start=+<<\s*"\z([^\\"]*\%(\\.[^\\"]*\)*\)"+ matchgroup=perlStringStartEnd end=+^\z1$+ contains=perlHereDocStart,@perlInterpDQ fold extend
  syn region perlHereDoc	start=+<<\s*'\z([^\\']*\%(\\.[^\\']*\)*\)'+ matchgroup=perlStringStartEnd end=+^\z1$+ contains=perlHereDocStart,@perlInterpSQ fold extend
  syn region perlHereDoc	start=+<<\s*""+ matchgroup=perlStringStartEnd           end=+^$+    contains=perlHereDocStart,@perlInterpDQ,perlNotEmptyLine fold extend
  syn region perlHereDoc	start=+<<\s*''+ matchgroup=perlStringStartEnd           end=+^$+    contains=perlHereDocStart,@perlInterpSQ,perlNotEmptyLine fold extend
  syn region perlAutoload	matchgroup=perlStringStartEnd start=+<<\s*$['"]\=$\z(END_\%(SUB\|OF_FUNC\|OF_AUTOLOAD\)\)\1+ end=+^\z1$+ contains=ALL fold extend
else
  syn region perlHereDoc	start=+<<\z(\I\i*\)+ matchgroup=perlStringStartEnd      end=+^\z1$+ contains=perlHereDocStart,@perlInterpDQ
  syn region perlHereDoc	start=+<<\s*"\z([^\\"]*\%(\\.[^\\"]*\)*\)"+ matchgroup=perlStringStartEnd end=+^\z1$+ contains=perlHereDocStart,@perlInterpDQ
  syn region perlHereDoc	start=+<<\s*'\z([^\\']*\%(\\.[^\\']*\)*\)'+ matchgroup=perlStringStartEnd end=+^\z1$+ contains=perlHereDocStart,@perlInterpSQ
  syn region perlHereDoc	start=+<<\s*""+ matchgroup=perlStringStartEnd           end=+^$+    contains=perlHereDocStart,@perlInterpDQ,perlNotEmptyLine
  syn region perlHereDoc	start=+<<\s*''+ matchgroup=perlStringStartEnd           end=+^$+    contains=perlHereDocStart,@perlInterpSQ,perlNotEmptyLine
  syn region perlAutoload	matchgroup=perlStringStartEnd start=+<<\s*$['"]\=$\z(END_\%(SUB\|OF_FUNC\|OF_AUTOLOAD\)\)\1+ end=+^\z1$+ contains=ALL
endif

" Class declarations
"
syn match   perlPackageDecl		"\<package\s\+\%(\h\|::\)\%(\w\|::\)*" contains=perlStatementPackage
syn keyword perlStatementPackage	package contained

" Functions
"       sub [name] [(prototype)] {
"
syn match perlSubError "[^[:space:];{#]" contained
syn match perlSubAttributesCont "\h\w*\_s*\%(:\_s*\)\=" nextgroup=@perlSubAttrMaybe contained
syn region perlSubAttributesCont matchgroup=perlSubAttributesCont start="\h\w*(" end=")\_s*\%(:\_s*\)\=" nextgroup=@perlSubAttrMaybe contained contains=@perlInterpSQ,perlParensSQ
syn cluster perlSubAttrMaybe contains=perlSubAttributesCont,perlSubError,perlFakeGroup
syn match perlSubAttributes "" contained nextgroup=perlSubError
syn match perlSubAttributes ":\_s*" contained nextgroup=@perlSubAttrMaybe
if get(g:, "perl_sub_signatures", 0)
    syn match perlSignature +(\_[^)]*)\_s*+ nextgroup=perlSubAttributes,perlComment contained
else
    syn match perlSubPrototypeError "(\%(\_s*\%(\%(\\\%([$@%&*]\|\[[$@%&*]\+\]\)\|[$&*]\|[@%]\%(\_s*)\)\@=\|;\%(\_s*[)$@%&*\\]\)\@=\|_\%(\_s*[);]\)\@=\)\_s*\)*\)\@>\zs\_[^)]\+" contained
    syn match perlSubPrototype +(\_[^)]*)\_s*+ nextgroup=perlSubAttributes,perlComment contained contains=perlSubPrototypeError
endif

syn match perlSubName +\%(\h\|::\|'\w\)\%(\w\|::\|'\w\)*\_s*\|+ contained nextgroup=perlSubPrototype,perlSignature,perlSubAttributes,perlComment

syn match perlFunction +\<sub\>\_s*+ nextgroup=perlSubName

" The => operator forces a bareword to the left of it to be interpreted as
" a string
syn match  perlString "\I\@<!-\?\I\i*\%(\s*=>\)\@="

" All other # are comments, except ^#!
syn match  perlComment		"#.*" contains=perlTodo,@Spell extend
syn match  perlSharpBang	"^#!.*"

" Formats
syn region perlFormat		matchgroup=perlStatementIOFunc start="^\s*\<format\s\+\k\+\s*=\s*$"rs=s+6 end="^\s*\.\s*$" contains=perlFormatName,perlFormatField,perlVarPlain,perlVarPlain2
syn match  perlFormatName	"format\s\+\k\+\s*="lc=7,me=e-1 contained
syn match  perlFormatField	"[@^][|<>~]\+\%(\.\.\.\)\=" contained
syn match  perlFormatField	"[@^]#[#.]*" contained
syn match  perlFormatField	"@\*" contained
syn match  perlFormatField	"@[^A-Za-z_|<>~#*]"me=e-1 contained
syn match  perlFormatField	"@$" contained

" __END__ and __DATA__ clauses
if exists("perl_fold")
  syntax region perlDATA		start="^__DATA__$" skip="." end="." contains=@perlDATA fold
  syntax region perlDATA		start="^__END__$" skip="." end="." contains=perlPOD,@perlDATA fold
else
  syntax region perlDATA		start="^__DATA__$" skip="." end="." contains=@perlDATA
  syntax region perlDATA		start="^__END__$" skip="." end="." contains=perlPOD,@perlDATA
endif

"
" Folding

if exists("perl_fold")
  " Note: this bit must come before the actual highlighting of the "package"
  " keyword, otherwise this will screw up Pod lines that match /^package/
  if !exists("perl_nofold_packages")
    syn region perlPackageFold start="^package \S\+;\s*\%(#.*\)\=$" end="^1;\=\s*\%(#.*\)\=$" end="\n\+package"me=s-1 transparent fold keepend
  endif
  if !exists("perl_nofold_subs")
    if get(g:, "perl_fold_anonymous_subs", 0)
      syn region perlSubFold start="\<sub\>[^{]*{" end="}" transparent fold keepend extend
      syn region perlSubFold start="\<\%(BEGIN\|END\|CHECK\|INIT\)\>\s*{" end="}" transparent fold keepend
    else
      syn region perlSubFold     start="^\z(\s*\)\<sub\>.*[^};]$" end="^\z1}\s*\%(#.*\)\=$" transparent fold keepend
      syn region perlSubFold start="^\z(\s*\)\<\%(BEGIN\|END\|CHECK\|INIT\|UNITCHECK\)\>.*[^};]$" end="^\z1}\s*$" transparent fold keepend
    endif
  endif

if exists("perl_fold_blocks")
    syn region perlBlockFold start="^\z(\s*\)\%(if\|elsif\|unless\|for\|while\|until\|given\)\s*(.*)\%(\s*{\)\=\s*\%(#.*\)\=$" start="^\z(\s*\)for\%(each\)\=\s*\%(\%(my\|our\)\=\s*\S\+\s*\)\=(.*)\%(\s*{\)\=\s*\%(#.*\)\=$" end="^\z1}\s*;\=\%(#.*\)\=$" transparent fold keepend
    syn region perlBlockFold start="^\z(\s*\)\%(do\|else\)\%(\s*{\)\=\s*\%(#.*\)\=$" end="^\z1}\s*while" end="^\z1}\s*;\=\%(#.*\)\=$" transparent fold keepend
  endif

setlocal foldmethod=syntax
  syn sync fromstart
else
  " fromstart above seems to set minlines even if perl_fold is not set.
  syn sync minlines=0
endif

" NOTE: If you're linking new highlight groups to perlString, please also put
"       them into b:match_skip in ftplugin/perl.vim.

" The default highlighting.
hi def link perlSharpBang		PreProc
hi def link perlControl		PreProc
hi def link perlInclude		Include
hi def link perlSpecial		Special
hi def link perlString		String
hi def link perlCharacter		Character
hi def link perlNumber		Number
hi def link perlFloat		Float
hi def link perlType			Type
hi def link perlIdentifier		Identifier
hi def link perlLabel		Label
hi def link perlStatement		Statement
hi def link perlConditional		Conditional
hi def link perlRepeat		Repeat
hi def link perlOperator		Operator
hi def link perlFunction		Keyword
hi def link perlSubName		Function
hi def link perlSubPrototype		Type
hi def link perlSignature		Type
hi def link perlSubAttributes	PreProc
hi def link perlSubAttributesCont	perlSubAttributes
hi def link perlComment		Comment
hi def link perlTodo			Todo
if exists("perl_string_as_statement")
  hi def link perlStringStartEnd	perlStatement
else
  hi def link perlStringStartEnd	perlString
endif
hi def link perlVStringV		perlStringStartEnd
hi def link perlList			perlStatement
hi def link perlMisc			perlStatement
hi def link perlVarPlain		perlIdentifier
hi def link perlVarPlain2		perlIdentifier
hi def link perlArrow		perlIdentifier
hi def link perlFiledescRead		perlIdentifier
hi def link perlFiledescStatement	perlIdentifier
hi def link perlVarSimpleMember	perlIdentifier
hi def link perlVarSimpleMemberName 	perlString
hi def link perlVarNotInMatches	perlIdentifier
hi def link perlVarSlash		perlIdentifier
hi def link perlQQ			perlString
hi def link perlHereDoc		perlString
hi def link perlStringUnexpanded	perlString
hi def link perlSubstitutionSQ	perlString
hi def link perlSubstitutionGQQ	perlString
hi def link perlTranslationGQ	perlString
hi def link perlMatch		perlString
hi def link perlMatchStartEnd	perlStatement
hi def link perlFormatName		perlIdentifier
hi def link perlFormatField		perlString
hi def link perlPackageDecl		perlType
hi def link perlStorageClass		perlType
hi def link perlPackageRef		perlType
hi def link perlStatementPackage	perlStatement
hi def link perlStatementStorage	perlStatement
hi def link perlStatementControl	perlStatement
hi def link perlStatementScalar	perlStatement
hi def link perlStatementRegexp	perlStatement
hi def link perlStatementNumeric	perlStatement
hi def link perlStatementList	perlStatement
hi def link perlStatementHash	perlStatement
hi def link perlStatementIOfunc	perlStatement
hi def link perlStatementFiledesc	perlStatement
hi def link perlStatementVector	perlStatement
hi def link perlStatementFiles	perlStatement
hi def link perlStatementFlow	perlStatement
hi def link perlStatementInclude	perlStatement
hi def link perlStatementProc	perlStatement
hi def link perlStatementSocket	perlStatement
hi def link perlStatementIPC		perlStatement
hi def link perlStatementNetwork	perlStatement
hi def link perlStatementPword	perlStatement
hi def link perlStatementTime	perlStatement
hi def link perlStatementMisc	perlStatement
hi def link perlStatementIndirObj	perlStatement
hi def link perlFunctionName		perlIdentifier
hi def link perlMethod		perlIdentifier
hi def link perlPostDeref		perlIdentifier
hi def link perlFunctionPRef		perlType
if !get(g:, 'perl_include_pod', 1)
  hi def link perlPOD		perlComment
endif
hi def link perlShellCommand		perlString
hi def link perlSpecialAscii		perlSpecial
hi def link perlSpecialDollar	perlSpecial
hi def link perlSpecialString	perlSpecial
hi def link perlSpecialStringU	perlSpecial
hi def link perlSpecialMatch		perlSpecial
hi def link perlDATA			perlComment

" NOTE: Due to a bug in Vim (or more likely, a misunderstanding on my part),
"       I had to remove the transparent property from the following regions
"       in order to get them to highlight correctly.  Feel free to remove
"       these and reinstate the transparent property if you know how.
hi def link perlParensSQ		perlString
hi def link perlBracketsSQ		perlString
hi def link perlBracesSQ		perlString
hi def link perlAnglesSQ		perlString

hi def link perlParensDQ		perlString
hi def link perlBracketsDQ		perlString
hi def link perlBracesDQ		perlString
hi def link perlAnglesDQ		perlString

hi def link perlSpecialStringU2	perlString

" Possible errors
hi def link perlNotEmptyLine		Error
hi def link perlElseIfError		Error
hi def link perlSubPrototypeError	Error
hi def link perlSubError		Error

" Syncing to speed up processing
"
if !exists("perl_no_sync_on_sub")
  syn sync match perlSync	grouphere NONE "^\s*\<package\s"
  syn sync match perlSync	grouphere NONE "^\s*\<sub\>"
  syn sync match perlSync	grouphere NONE "^}"
endif

if !exists("perl_no_sync_on_global_var")
  syn sync match perlSync	grouphere NONE "^$\I[[:alnum:]_:]+\s*=\s*{"
  syn sync match perlSync	grouphere NONE "^[@%]\I[[:alnum:]_:]+\s*=\s*("
endif

if exists("perl_sync_dist")
  execute "syn sync maxlines=" . perl_sync_dist
else
  syn sync maxlines=100
endif

syn sync match perlSyncPOD	grouphere perlPOD "^=pod"
syn sync match perlSyncPOD	grouphere perlPOD "^=head"
syn sync match perlSyncPOD	grouphere perlPOD "^=item"
syn sync match perlSyncPOD	grouphere NONE "^=cut"

let b:current_syntax = "perl"

let &cpo = s:cpo_save
unlet s:cpo_save

" XXX Change to sts=4:sw=4
" vim:ts=8:sts=2:sw=2:expandtab:ft=vim

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