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" Vim syntax file
" Language: Perl
" Maintainer: Nick Hibma <nick@van-laarhoven.org>
" Last Change: 2006 November 23
" Location: http://www.van-laarhoven.org/vim/syntax/perl.vim
"
" Please download most recent version first before mailing
" any comments.
" See also the file perl.vim.regression.pl to check whether your
" modifications work in the most odd cases
" http://www.van-laarhoven.org/vim/syntax/perl.vim.regression.pl
"
" Original version: Sonia Heimann <niania@netsurf.org>
" Thanks to many people for their contribution.

" The following parameters are available for tuning the
" perl syntax highlighting, with defaults given:
"
" unlet perl_include_pod
" unlet perl_want_scope_in_variables
" unlet perl_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
" let perl_nofold_packages = 1
" let perl_nofold_subs = 1

" Remove any old syntax stuff that was loaded (5.x) or quit when a syntax file
" was already loaded (6.x).
if version < 600
  syntax clear
elseif exists("b:current_syntax")
  finish
endif

" Unset perl_fold if it set but vim doesn't support it.
if version < 600 && exists("perl_fold")
  unlet perl_fold
endif


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

if exists("perl_include_pod")
" 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
    syn region perlPOD start="^=cut" end="^=cut" contains=perlTodo keepend fold
  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


" All keywords
"
if exists("perl_fold") && exists("perl_fold_blocks")
  syn match perlConditional "\<if\>"
  syn match perlConditional "\<elsif\>"
  syn match perlConditional "\<unless\>"
  syn match perlConditional "\<else\>" nextgroup=perlElseIfError skipwhite skipnl skipempty
else
  syn keyword perlConditional if elsif unless
  syn keyword perlConditional else nextgroup=perlElseIfError skipwhite skipnl skipempty
endif
syn keyword perlConditional switch eq ne gt lt ge le cmp not and or xor err
if exists("perl_fold") && exists("perl_fold_blocks")
  syn match perlRepeat "\<while\>"
  syn match perlRepeat "\<for\>"
  syn match perlRepeat "\<foreach\>"
  syn match perlRepeat "\<do\>"
  syn match perlRepeat "\<until\>"
  syn match perlRepeat "\<continue\>"
else
  syn keyword perlRepeat while for foreach do until continue
endif
syn keyword perlOperator defined undef and or not bless ref
if exists("perl_fold")
" if BEGIN/END would be a keyword the perlBEGINENDFold does not work
  syn match perlControl "\<BEGIN\|CHECK\|INIT\|END\>" contained
else
  syn keyword perlControl BEGIN END CHECK INIT
endif

syn keyword perlStatementStorage my local our
syn keyword perlStatementControl goto return last next redo
syn keyword perlStatementScalar chomp chop chr crypt index lc lcfirst length ord pack reverse rindex sprintf substr uc ucfirst
syn keyword perlStatementRegexp pos quotemeta split study
syn keyword perlStatementNumeric abs atan2 cos exp hex int log oct rand sin sqrt srand
syn keyword perlStatementList splice unshift shift push pop split join reverse grep map sort unpack
syn keyword perlStatementHash each exists keys values tie tied untie
syn keyword perlStatementIOfunc carp confess croak dbmclose dbmopen die syscall
syn keyword perlStatementFiledesc binmode close closedir eof fileno getc lstat print printf readdir readline readpipe rewinddir select stat tell telldir write nextgroup=perlFiledescStatementNocomma skipwhite
syn keyword perlStatementFiledesc fcntl flock ioctl open opendir read seek seekdir sysopen sysread sysseek syswrite truncate nextgroup=perlFiledescStatementComma skipwhite
syn keyword perlStatementVector pack vec
syn keyword perlStatementFiles chdir chmod chown chroot glob link mkdir readlink rename rmdir symlink umask unlink utime
syn match perlStatementFiles "-[rwxoRWXOezsfdlpSbctugkTBMAC]\>"
syn keyword perlStatementFlow caller die dump eval exit wantarray
syn keyword perlStatementInclude require
syn match perlStatementInclude "\<\(use\|no\)\s\+\(\(integer\|strict\|lib\|sigtrap\|subs\|vars\|warnings\|utf8\|byte\|base\|fields\)\>\)\="
syn keyword perlStatementScope import
syn keyword perlStatementProc alarm exec fork getpgrp getppid getpriority kill pipe setpgrp setpriority sleep system times wait waitpid
syn keyword perlStatementSocket accept bind connect getpeername getsockname getsockopt listen recv send setsockopt shutdown socket socketpair
syn keyword perlStatementIPC msgctl msgget msgrcv msgsnd semctl semget semop shmctl shmget shmread shmwrite
syn keyword perlStatementNetwork endhostent endnetent endprotoent endservent gethostbyaddr gethostbyname gethostent getnetbyaddr getnetbyname getnetent getprotobyname getprotobynumber getprotoent getservbyname getservbyport getservent sethostent setnetent setprotoent setservent
syn keyword perlStatementPword getpwuid getpwnam getpwent setpwent endpwent getgrent getgrgid getlogin getgrnam setgrent endgrent
syn keyword perlStatementTime gmtime localtime time times

syn keyword perlStatementMisc warn formline reset scalar delete prototype lock
syn keyword perlStatementNew new

syn keyword perlTodo TODO TBD FIXME XXX contained

" 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 ($^A, ...) and ($|, $', ...)
syn match perlVarPlain "$^[ADEFHILMOPSTWX]\="
syn match perlVarPlain "$[\\\"\[\]'&`+*.,;=%~!?@#$<>(-]"
syn match perlVarPlain "$\(0\|[1-9][0-9]*\)"
" 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 "\(\h\w*\)\=\(::\|'\)\I"me=e-1 contained

" To highlight packages in variables as a scope reference - i.e. in $pack::var,
" pack:: is a scope, just set "perl_want_scope_in_variables"
" If you *want* complex things like @{${"foo"}} to be processed,
" just set the variable "perl_extended_vars"...

" FIXME value between {} should be marked as string. is treated as such by Perl.
" At the moment it is marked as something greyish instead of read. Probably todo
" with transparency. Or maybe we should handle the bare word in that case. or make it into

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

if exists("perl_extended_vars")
  syn cluster perlExpr contains=perlStatementScalar,perlStatementRegexp,perlStatementNumeric,perlStatementList,perlStatementHash,perlStatementFiles,perlStatementTime,perlStatementMisc,perlVarPlain,perlVarPlain2,perlVarNotInMatches,perlVarSlash,perlVarBlock,perlShellCommand,perlFloat,perlNumber,perlStringUnexpanded,perlString,perlQQ
  syn region perlVarBlock matchgroup=perlVarPlain start="\($#\|[@%$]\)\$*{" skip="\\}" end="}" contains=@perlExpr nextgroup=perlVarMember,perlVarSimpleMember
  syn region perlVarBlock matchgroup=perlVarPlain start="&\$*{" skip="\\}" end="}" contains=@perlExpr
  syn match perlVarPlain "\\\=\(\$#\|[@%&$]\)\$*{\I\i*}" nextgroup=perlVarMember,perlVarSimpleMember
  syn region perlVarMember matchgroup=perlVarPlain start="\(->\)\={" skip="\\}" end="}" contained contains=@perlExpr nextgroup=perlVarMember,perlVarSimpleMember
  syn match perlVarSimpleMember "\(->\)\={\I\i*}" nextgroup=perlVarMember,perlVarSimpleMember contains=perlVarSimpleMemberName contained
  syn match perlVarSimpleMemberName "\I\i*" contained
  syn region perlVarMember matchgroup=perlVarPlain start="\(->\)\=\[" skip="\\]" end="]" contained contains=@perlExpr nextgroup=perlVarMember,perlVarSimpleMember
  syn match perlMethod "\(->\)\I\i*" contained
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 "\\\(\d\+\|[xX]\x\+\|c\u\|.\)" contained
syn match perlSpecialStringU "\\['\\]" contained
syn match perlSpecialMatch "{\d\+\(,\(\d\+\)\=\)\=}" contained
syn match perlSpecialMatch "\[\(\]\|-\)\=[^\[\]]*\(\[\|\-\)\=\]" contained
syn match perlSpecialMatch "[+*()?.]" contained
syn match perlSpecialMatch "(?[#:=!]" contained
syn match perlSpecialMatch "(?[imsx]\+)" contained
" FIXME the line below does not work. It should mark end of line and
" begin of line as perlSpecial.
" syn match perlSpecialBEOM "^\^\|\$$" 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 keyword perlElseIfError if contained

" 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
" These items are interpolated inside m// matches and s/// substitutions.
syn cluster perlInterpSlash contains=perlSpecialString,perlSpecialMatch,perlVarPlain,perlVarBlock,perlSpecialBEOM
" 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

" Constants
"
" Numbers
syn match perlNumber "[-+]\=\(\<\d[[:digit:]_]*L\=\>\|0[xX]\x[[:xdigit:]_]*\>\)"
syn match perlFloat "[-+]\=\<\d[[:digit:]_]*[eE][\-+]\=\d\+"
syn match perlFloat "[-+]\=\<\d[[:digit:]_]*\.[[:digit:]_]*\([eE][\-+]\=\d\+\)\="
syn match perlFloat "[-+]\=\<\.[[:digit:]_]\+\([eE][\-+]\=\d\+\)\="


" Simple version of searches and matches
" caters for m//, m##, m{} and m[] (and the !/ variant)
syn region perlMatch matchgroup=perlMatchStartEnd start=+[m!]/+ end=+/[cgimosx]*+ contains=@perlInterpSlash
syn region perlMatch matchgroup=perlMatchStartEnd start=+[m!]#+ end=+#[cgimosx]*+ contains=@perlInterpMatch
syn region perlMatch matchgroup=perlMatchStartEnd start=+[m!]{+ end=+}[cgimosx]*+ contains=@perlInterpMatch
syn region perlMatch matchgroup=perlMatchStartEnd start=+[m!]\[+ end=+\][cgimosx]*+ contains=@perlInterpMatch

" A special case for m!!x which allows for comments and extra whitespace in the pattern
syn region perlMatch matchgroup=perlMatchStartEnd start=+[m!]!+ end=+![cgimosx]*+ contains=@perlInterpSlash,perlComment

" 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 /+lc=5 start=+[^$@%]\<split /+lc=6 start=+^while /+lc=5 start=+[^$@%]\<while /+lc=6 start=+^if /+lc=2 start=+[^$@%]\<if /+lc=3 start=+[!=]\~\s*/+lc=2 start=+[(~]/+lc=1 start=+\.\./+lc=2 start=+\s/[^= \t0-9$@%]+lc=1,me=e-1,rs=e-1 start=+^/+ skip=+\\/+ end=+/[cgimosx]*+ contains=@perlInterpSlash


" Substitutions
" caters for s///, s### and s[][]
" perlMatch is the first part, perlSubstitution* is the substitution part
syn region perlMatch matchgroup=perlMatchStartEnd start=+\<s'+ end=+'+me=e-1 contains=@perlInterpSQ nextgroup=perlSubstitutionSQ
syn region perlMatch matchgroup=perlMatchStartEnd start=+\<s"+ end=+"+me=e-1 contains=@perlInterpMatch nextgroup=perlSubstitutionDQ
syn region perlMatch matchgroup=perlMatchStartEnd start=+\<s/+ end=+/+me=e-1 contains=@perlInterpSlash nextgroup=perlSubstitutionSlash
syn region perlMatch matchgroup=perlMatchStartEnd start=+\<s#+ end=+#+me=e-1 contains=@perlInterpMatch nextgroup=perlSubstitutionHash
syn region perlMatch matchgroup=perlMatchStartEnd start=+\<s\[+ end=+\]+ contains=@perlInterpMatch nextgroup=perlSubstitutionBracket skipwhite skipempty skipnl
syn region perlMatch matchgroup=perlMatchStartEnd start=+\<s{+ end=+}+ contains=@perlInterpMatch nextgroup=perlSubstitutionCurly skipwhite skipempty skipnl
syn region perlSubstitutionSQ matchgroup=perlMatchStartEnd start=+'+ end=+'[ecgimosx]*+ contained contains=@perlInterpSQ
syn region perlSubstitutionDQ matchgroup=perlMatchStartEnd start=+"+ end=+"[ecgimosx]*+ contained contains=@perlInterpDQ
syn region perlSubstitutionSlash matchgroup=perlMatchStartEnd start=+/+ end=+/[ecgimosx]*+ contained contains=@perlInterpDQ
syn region perlSubstitutionHash matchgroup=perlMatchStartEnd start=+#+ end=+#[ecgimosx]*+ contained contains=@perlInterpDQ
syn region perlSubstitutionBracket matchgroup=perlMatchStartEnd start=+\[+ end=+\][ecgimosx]*+ contained contains=@perlInterpDQ
syn region perlSubstitutionCurly matchgroup=perlMatchStartEnd start=+{+ end=+}[ecgimosx]*+ contained contains=@perlInterpDQ

" A special case for m!!x which allows for comments and extra whitespace in the pattern
syn region perlMatch matchgroup=perlMatchStartEnd start=+\<s!+ end=+!+me=e-1 contains=@perlInterpSlash,perlComment nextgroup=perlSubstitutionPling
syn region perlSubstitutionPling matchgroup=perlMatchStartEnd start=+!+ end=+![ecgimosx]*+ contained contains=@perlInterpDQ

" Substitutions
" caters for tr///, tr### and tr[][]
" perlMatch is the first part, perlTranslation* is the second, translator part.
syn region perlMatch matchgroup=perlMatchStartEnd start=+\<\(tr\|y\)'+ end=+'+me=e-1 contains=@perlInterpSQ nextgroup=perlTranslationSQ
syn region perlMatch matchgroup=perlMatchStartEnd start=+\<\(tr\|y\)"+ end=+"+me=e-1 contains=@perlInterpSQ nextgroup=perlTranslationDQ
syn region perlMatch matchgroup=perlMatchStartEnd start=+\<\(tr\|y\)/+ end=+/+me=e-1 contains=@perlInterpSQ nextgroup=perlTranslationSlash
syn region perlMatch matchgroup=perlMatchStartEnd start=+\<\(tr\|y\)#+ end=+#+me=e-1 contains=@perlInterpSQ nextgroup=perlTranslationHash
syn region perlMatch matchgroup=perlMatchStartEnd start=+\<\(tr\|y\)\[+ end=+\]+ contains=@perlInterpSQ nextgroup=perlTranslationBracket skipwhite skipempty skipnl
syn region perlMatch matchgroup=perlMatchStartEnd start=+\<\(tr\|y\){+ end=+}+ contains=@perlInterpSQ nextgroup=perlTranslationCurly skipwhite skipempty skipnl
syn region perlTranslationSQ matchgroup=perlMatchStartEnd start=+'+ end=+'[cds]*+ contained
syn region perlTranslationDQ matchgroup=perlMatchStartEnd start=+"+ end=+"[cds]*+ contained
syn region perlTranslationSlash matchgroup=perlMatchStartEnd start=+/+ end=+/[cds]*+ contained
syn region perlTranslationHash matchgroup=perlMatchStartEnd start=+#+ end=+#[cds]*+ contained
syn region perlTranslationBracket matchgroup=perlMatchStartEnd start=+\[+ end=+\][cds]*+ contained
syn region perlTranslationCurly matchgroup=perlMatchStartEnd start=+{+ end=+}[cds]*+ contained


" The => operator forces a bareword to the left of it to be interpreted as
" a string
syn match perlString "\<\I\i*\s*=>"me=e-2

" Strings and q, qq, qw and qr expressions

" Brackets in qq()
syn region perlBrackets start=+(+ end=+)+ contained transparent contains=perlBrackets,@perlStringSQ

syn region perlStringUnexpanded matchgroup=perlStringStartEnd start="'" end="'" contains=@perlInterpSQ
syn region perlString matchgroup=perlStringStartEnd start=+"+ end=+"+ contains=@perlInterpDQ
syn region perlQQ matchgroup=perlStringStartEnd start=+\<q#+ end=+#+ contains=@perlInterpSQ
syn region perlQQ matchgroup=perlStringStartEnd start=+\<q|+ end=+|+ contains=@perlInterpSQ
syn region perlQQ matchgroup=perlStringStartEnd start=+\<q(+ end=+)+ contains=@perlInterpSQ,perlBrackets
syn region perlQQ matchgroup=perlStringStartEnd start=+\<q{+ end=+}+ contains=@perlInterpSQ
syn region perlQQ matchgroup=perlStringStartEnd start=+\<q/+ end=+/+ contains=@perlInterpSQ
syn region perlQQ matchgroup=perlStringStartEnd start=+\<q[qx]#+ end=+#+ contains=@perlInterpDQ
syn region perlQQ matchgroup=perlStringStartEnd start=+\<q[qx]|+ end=+|+ contains=@perlInterpDQ
syn region perlQQ matchgroup=perlStringStartEnd start=+\<q[qx](+ end=+)+ contains=@perlInterpDQ,perlBrackets
syn region perlQQ matchgroup=perlStringStartEnd start=+\<q[qx]{+ end=+}+ contains=@perlInterpDQ
syn region perlQQ matchgroup=perlStringStartEnd start=+\<q[qx]/+ end=+/+ contains=@perlInterpDQ
syn region perlQQ matchgroup=perlStringStartEnd start=+\<qw#+ end=+#+ contains=@perlInterpSQ
syn region perlQQ matchgroup=perlStringStartEnd start=+\<qw|+ end=+|+ contains=@perlInterpSQ
syn region perlQQ matchgroup=perlStringStartEnd start=+\<qw(+ end=+)+ contains=@perlInterpSQ,perlBrackets
syn region perlQQ matchgroup=perlStringStartEnd start=+\<qw{+ end=+}+ contains=@perlInterpSQ
syn region perlQQ matchgroup=perlStringStartEnd start=+\<qw/+ end=+/+ contains=@perlInterpSQ
syn region perlQQ matchgroup=perlStringStartEnd start=+\<qr#+ end=+#[imosx]*+ contains=@perlInterpMatch
syn region perlQQ matchgroup=perlStringStartEnd start=+\<qr|+ end=+|[imosx]*+ contains=@perlInterpMatch
syn region perlQQ matchgroup=perlStringStartEnd start=+\<qr(+ end=+)[imosx]*+ contains=@perlInterpMatch
syn region perlQQ matchgroup=perlStringStartEnd start=+\<qr{+ end=+}[imosx]*+ contains=@perlInterpMatch
syn region perlQQ matchgroup=perlStringStartEnd start=+\<qr/+ end=+/[imosx]*+ contains=@perlInterpSlash

" Constructs such as print <<EOF [...] EOF, 'here' documents
"
if version >= 600
" XXX Any statements after the identifier are in perlString colour (i.e.
" 'if $a' in 'print <<EOF if $a').
  if exists("perl_fold")
    syn region perlHereDoc matchgroup=perlStringStartEnd start=+<<\z(\I\i*\).*+ end=+^\z1$+ contains=@perlInterpDQ fold
    syn region perlHereDoc matchgroup=perlStringStartEnd start=+<<\s*"\z(.\{-}\)"+ end=+^\z1$+ contains=@perlInterpDQ fold
    syn region perlHereDoc matchgroup=perlStringStartEnd start=+<<\s*'\z(.\{-}\)'+ end=+^\z1$+ contains=@perlInterpSQ fold
    syn region perlHereDoc matchgroup=perlStringStartEnd start=+<<\s*""+ end=+^$+ contains=@perlInterpDQ,perlNotEmptyLine fold
    syn region perlHereDoc matchgroup=perlStringStartEnd start=+<<\s*''+ end=+^$+ contains=@perlInterpSQ,perlNotEmptyLine fold
    syn region perlAutoload matchgroup=perlStringStartEnd start=+<<['"]\z(END_\(SUB\|OF_FUNC\|OF_AUTOLOAD\)\)['"]+ end=+^\z1$+ contains=ALL fold
  else
    syn region perlHereDoc matchgroup=perlStringStartEnd start=+<<\z(\I\i*\)+ end=+^\z1$+ contains=@perlInterpDQ
    syn region perlHereDoc matchgroup=perlStringStartEnd start=+<<\s*"\z(.\{-}\)"+ end=+^\z1$+ contains=@perlInterpDQ
    syn region perlHereDoc matchgroup=perlStringStartEnd start=+<<\s*'\z(.\{-}\)'+ end=+^\z1$+ contains=@perlInterpSQ
    syn region perlHereDoc matchgroup=perlStringStartEnd start=+<<\s*""+ end=+^$+ contains=@perlInterpDQ,perlNotEmptyLine
    syn region perlHereDoc matchgroup=perlStringStartEnd start=+<<\s*''+ end=+^$+ contains=@perlInterpSQ,perlNotEmptyLine
    syn region perlAutoload matchgroup=perlStringStartEnd start=+<<\(['"]\|\)\z(END_\(SUB\|OF_FUNC\|OF_AUTOLOAD\)\)\1+ end=+^\z1$+ contains=ALL
  endif
else
  syn match perlUntilEOFStart "<<EOF.*"lc=5 nextgroup=perlUntilEOFDQ skipnl transparent
  syn match perlUntilEOFStart "<<\s*\"EOF\".*" nextgroup=perlUntilEOFDQ skipnl transparent
  syn match perlUntilEOFStart "<<\s*'EOF'.*" nextgroup=perlUntilEOFSQ skipnl transparent
  syn match perlUntilEOFStart "<<\s*\"\".*" nextgroup=perlUntilEmptyDQ skipnl transparent
  syn match perlUntilEOFStart "<<\s*''.*" nextgroup=perlUntilEmptySQ skipnl transparent
  syn region perlUntilEOFDQ matchgroup=perlStringStartEnd start=++ end="^EOF$" contains=@perlInterpDQ contained
  syn region perlUntilEOFSQ matchgroup=perlStringStartEnd start=++ end="^EOF$" contains=@perlInterpSQ contained
  syn region perlUntilEmptySQ matchgroup=perlStringStartEnd start=++ end="^$" contains=@perlInterpDQ,perlNotEmptyLine contained
  syn region perlUntilEmptyDQ matchgroup=perlStringStartEnd start=++ end="^$" contains=@perlInterpSQ,perlNotEmptyLine contained
  syn match perlHereIdentifier "<<EOF"
  syn region perlAutoload matchgroup=perlStringStartEnd start=+<<\(['"]\|\)\(END_\(SUB\|OF_FUNC\|OF_AUTOLOAD\)\)\1+ end=+^\(END_\(SUB\|OF_FUNC\|OF_AUTOLOAD\)\)$+ contains=ALL
endif


" Class declarations
"
syn match perlPackageDecl "^\s*\<package\s\+\S\+" contains=perlStatementPackage
syn keyword perlStatementPackage package contained

" Functions
" sub [name] [(prototype)] {
"
syn region perlFunction start="\s*\<sub\>" end="[;{]"he=e-1 contains=perlStatementSub,perlFunctionPrototype,perlFunctionPRef,perlFunctionName,perlComment
syn keyword perlStatementSub sub contained

syn match perlFunctionPrototype "([^)]*)" contained
if exists("perl_want_scope_in_variables")
   syn match perlFunctionPRef "\h\w*::" contained
   syn match perlFunctionName "\h\w*[^:]" contained
else
   syn match perlFunctionName "\h[[:alnum:]_:]*" contained
endif

" All other # are comments, except ^#!
syn match perlComment "#.*" contains=perlTodo
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="^__\(DATA\|END\)__$" skip="." end="." contains=perlPOD,@perlDATA fold
else
  syntax region perlDATA start="^__\(DATA\|END\)__$" skip="." end="." contains=perlPOD,@perlDATA
endif


"
" Folding

if exists("perl_fold")
  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")
    syn region perlSubFold start="^\z(\s*\)\<sub\>.*[^};]$" end="^\z1}\s*\(#.*\)\=$" transparent fold keepend
    syn region perlSubFold start="^\z(\s*\)\<\(BEGIN\|END\|CHECK\|INIT\)\>.*[^};]$" end="^\z1}\s*$" transparent fold keepend
  endif

  if exists("perl_fold_blocks")
    syn region perlBlockFold start="^\z(\s*\)\(if\|elsif\|unless\|for\|while\|until\)\s*(.*)\(\s*{\)\=\s*\(#.*\)\=$" start="^\z(\s*\)foreach\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


if version >= 508 || !exists("did_perl_syn_inits")
  if version < 508
    let did_perl_syn_inits = 1
    command -nargs=+ HiLink hi link <args>
  else
    command -nargs=+ HiLink hi def link <args>
  endif

" The default highlighting.
  HiLink perlSharpBang PreProc
  HiLink perlControl PreProc
  HiLink perlInclude Include
  HiLink perlSpecial Special
  HiLink perlString String
  HiLink perlCharacter Character
  HiLink perlNumber Number
  HiLink perlFloat Float
  HiLink perlType Type
  HiLink perlIdentifier Identifier
  HiLink perlLabel Label
  HiLink perlStatement Statement
  HiLink perlConditional Conditional
  HiLink perlRepeat Repeat
  HiLink perlOperator Operator
  HiLink perlFunction Function
  HiLink perlFunctionPrototype perlFunction
  HiLink perlComment Comment
  HiLink perlTodo Todo
  if exists("perl_string_as_statement")
    HiLink perlStringStartEnd perlStatement
  else
    HiLink perlStringStartEnd perlString
  endif
  HiLink perlList perlStatement
  HiLink perlMisc perlStatement
  HiLink perlVarPlain perlIdentifier
  HiLink perlVarPlain2 perlIdentifier
  HiLink perlFiledescRead perlIdentifier
  HiLink perlFiledescStatement perlIdentifier
  HiLink perlVarSimpleMember perlIdentifier
  HiLink perlVarSimpleMemberName perlString
  HiLink perlVarNotInMatches perlIdentifier
  HiLink perlVarSlash perlIdentifier
  HiLink perlQQ perlString
  if version >= 600
    HiLink perlHereDoc perlString
  else
    HiLink perlHereIdentifier perlStringStartEnd
    HiLink perlUntilEOFDQ perlString
    HiLink perlUntilEOFSQ perlString
    HiLink perlUntilEmptyDQ perlString
    HiLink perlUntilEmptySQ perlString
    HiLink perlUntilEOF perlString
  endif
  HiLink perlStringUnexpanded perlString
  HiLink perlSubstitutionSQ perlString
  HiLink perlSubstitutionDQ perlString
  HiLink perlSubstitutionSlash perlString
  HiLink perlSubstitutionHash perlString
  HiLink perlSubstitutionBracket perlString
  HiLink perlSubstitutionCurly perlString
  HiLink perlSubstitutionPling perlString
  HiLink perlTranslationSlash perlString
  HiLink perlTranslationHash perlString
  HiLink perlTranslationBracket perlString
  HiLink perlTranslationCurly perlString
  HiLink perlMatch perlString
  HiLink perlMatchStartEnd perlStatement
  HiLink perlFormatName perlIdentifier
  HiLink perlFormatField perlString
  HiLink perlPackageDecl perlType
  HiLink perlStorageClass perlType
  HiLink perlPackageRef perlType
  HiLink perlStatementPackage perlStatement
  HiLink perlStatementSub perlStatement
  HiLink perlStatementStorage perlStatement
  HiLink perlStatementControl perlStatement
  HiLink perlStatementScalar perlStatement
  HiLink perlStatementRegexp perlStatement
  HiLink perlStatementNumeric perlStatement
  HiLink perlStatementList perlStatement
  HiLink perlStatementHash perlStatement
  HiLink perlStatementIOfunc perlStatement
  HiLink perlStatementFiledesc perlStatement
  HiLink perlStatementVector perlStatement
  HiLink perlStatementFiles perlStatement
  HiLink perlStatementFlow perlStatement
  HiLink perlStatementScope perlStatement
  HiLink perlStatementInclude perlStatement
  HiLink perlStatementProc perlStatement
  HiLink perlStatementSocket perlStatement
  HiLink perlStatementIPC perlStatement
  HiLink perlStatementNetwork perlStatement
  HiLink perlStatementPword perlStatement
  HiLink perlStatementTime perlStatement
  HiLink perlStatementMisc perlStatement
  HiLink perlStatementNew perlStatement
  HiLink perlFunctionName perlIdentifier
  HiLink perlMethod perlIdentifier
  HiLink perlFunctionPRef perlType
  HiLink perlPOD perlComment
  HiLink perlShellCommand perlString
  HiLink perlSpecialAscii perlSpecial
  HiLink perlSpecialDollar perlSpecial
  HiLink perlSpecialString perlSpecial
  HiLink perlSpecialStringU perlSpecial
  HiLink perlSpecialMatch perlSpecial
  HiLink perlSpecialBEOM perlSpecial
  HiLink perlDATA perlComment

  HiLink perlBrackets Error

" Possible errors
  HiLink perlNotEmptyLine Error
  HiLink perlElseIfError Error

  delcommand HiLink
endif

" 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 perlFunction "^\s*\<sub\s"
  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"

" vim: ts=8
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