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" Vim syntax file
" Language: Perl 5
" Maintainer: Andy Lester <andy@petdance.com>
" URL: http://github.com/petdance/vim-perl/tree/master
" Last Change: 2010-08-10
" 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>
" and many others.
"
" Please download most recent version first before mailing
" any comments.
"
" The following parameters are available for tuning the
" perl syntax highlighting, with defaults given:
"
" unlet perl_include_pod
" 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
" let perl_nofold_packages = 1
" let perl_nofold_subs = 1

if exists("b:current_syntax")
  finish
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


syn cluster perlTop contains=TOP
syn region perlGenericBlock matchgroup=perlGenericBlock start="{" end="}" contained transparent


" All keywords
"
syn match perlConditional "\<\%(if\|elsif\|unless\|given\|when\|default\)\>"
syn match perlConditional "\<else\>" nextgroup=perlElseIfError skipwhite skipnl skipempty
syn match perlRepeat "\<\%(while\|for\%(each\)\=\|do\|until\|continue\)\>"
syn match perlOperator "\<\%(defined\|undef\|eq\|ne\|[gl][et]\|cmp\|not\|and\|or\|xor\|not\|bless\|ref\|do\)\>"
syn match perlControl "\<\%(BEGIN\|CHECK\|INIT\|END\|UNITCHECK\)\>"

syn match perlStatementStorage "\<\%(my\|our\|local\|state\)\>"
syn match perlStatementControl "\<\%(return\|last\|next\|redo\|goto\|break\)\>"
syn match perlStatementScalar "\<\%(chom\=p\|chr\|crypt\|r\=index\|lc\%(first\)\=\|length\|ord\|pack\|sprintf\|substr\|uc\%(first\)\=\)\>"
syn match perlStatementRegexp "\<\%(pos\|quotemeta\|split\|study\)\>"
syn match perlStatementNumeric "\<\%(abs\|atan2\|cos\|exp\|hex\|int\|log\|oct\|rand\|sin\|sqrt\|srand\)\>"
syn match perlStatementList "\<\%(splice\|unshift\|shift\|push\|pop\|join\|reverse\|grep\|map\|sort\|unpack\)\>"
syn match perlStatementHash "\<\%(delete\|each\|exists\|keys\|values\)\>"
syn match perlStatementIOfunc "\<\%(syscall\|dbmopen\|dbmclose\)\>"
syn match perlStatementFiledesc "\<\%(binmode\|close\%(dir\)\=\|eof\|fileno\|getc\|lstat\|printf\=\|read\%(dir\|line\|pipe\)\|rewinddir\|say\|select\|stat\|tell\%(dir\)\=\|write\)\>" nextgroup=perlFiledescStatementNocomma skipwhite
syn match perlStatementFiledesc "\<\%(fcntl\|flock\|ioctl\|open\%(dir\)\=\|read\|seek\%(dir\)\=\|sys\%(open\|read\|seek\|write\)\|truncate\)\>" nextgroup=perlFiledescStatementComma skipwhite
syn match perlStatementVector "\<vec\>"
syn match perlStatementFiles "\<\%(ch\%(dir\|mod\|own\|root\)\|glob\|link\|mkdir\|readlink\|rename\|rmdir\|symlink\|umask\|unlink\|utime\)\>"
syn match perlStatementFiles "-[rwxoRWXOezsfdlpSbctugkTBMAC]\>"
syn match perlStatementFlow "\<\%(caller\|die\|dump\|eval\|exit\|wantarray\)\>"
syn match perlStatementInclude "\<require\>"
syn match perlStatementInclude "\<\%(use\|no\)\s\+\%(\%(attributes\|attrs\|autouse\|parent\|base\|big\%(int\|num\|rat\)\|blib\|bytes\|charnames\|constant\|diagnostics\|encoding\%(::warnings\)\=\|feature\|fields\|filetest\|if\|integer\|less\|lib\|locale\|mro\|open\|ops\|overload\|re\|sigtrap\|sort\|strict\|subs\|threads\%(::shared\)\=\|utf8\|vars\|version\|vmsish\|warnings\%(::register\)\=\)\>\)\="
syn match perlStatementProc "\<\%(alarm\|exec\|fork\|get\%(pgrp\|ppid\|priority\)\|kill\|pipe\|set\%(pgrp\|priority\)\|sleep\|system\|times\|wait\%(pid\)\=\)\>"
syn match perlStatementSocket "\<\%(acept\|bind\|connect\|get\%(peername\|sock\%(name\|opt\)\)\|listen\|recv\|send\|setsockopt\|shutdown\|socket\%(pair\)\=\)\>"
syn match perlStatementIPC "\<\%(msg\%(ctl\|get\|rcv\|snd\)\|sem\%(ctl\|get\|op\)\|shm\%(ctl\|get\|read\|write\)\)\>"
syn match perlStatementNetwork "\<\%(\%(end\|[gs]et\)\%(host\|net\|proto\|serv\)ent\|get\%(\%(host\|net\)by\%(addr\|name\)\|protoby\%(name\|number\)\|servby\%(name\|port\)\)\)\>"
syn match perlStatementPword "\<\%(get\%(pw\%(uid\|nam\)\|gr\%(gid\|nam\)\|login\)\)\|\%(end\|[gs]et\)\%(pw\|gr\)ent\>"
syn match perlStatementTime "\<\%(gmtime\|localtime\|time\)\>"

syn match perlStatementMisc "\<\%(warn\|formline\|reset\|scalar\|prototype\|lock\|tied\=\|untie\)\>"

syn keyword perlTodo TODO TBD FIXME XXX NOTE contained

syn region perlStatementIndirObjWrap matchgroup=perlStatementIndirObj start="\<\%(map\|grep\|sort\|print\|system\|exec\)\>\s*{" end="}" contains=@perlTop,perlGenericBlock

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

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,perlGenericBlock
  syn region perlArrow matchgroup=perlArrow start="->\s*(" end=")" contains=@perlExpr nextgroup=perlVarMember,perlVarSimpleMember,perlMethod contained
  syn region perlArrow matchgroup=perlArrow start="->\s*\[" end="\]" contains=@perlExpr nextgroup=perlVarMember,perlVarSimpleMember,perlMethod contained
  syn region perlArrow matchgroup=perlArrow start="->\s*{" end="}" contains=@perlExpr nextgroup=perlVarMember,perlVarSimpleMember,perlMethod contained
  syn match perlArrow "->\s*{\s*\I\i*\s*}" contains=perlVarSimpleMemberName nextgroup=perlVarMember,perlVarSimpleMember,perlMethod contained
  syn region perlArrow matchgroup=perlArrow start="->\s*\$*\I\i*\s*(" end=")" contains=@perlExpr nextgroup=perlVarMember,perlVarSimpleMember,perlMethod contained
  syn region perlVarBlock matchgroup=perlVarPlain start="\%($#\|[$@]\)\$*{" skip="\\}" end="}" contains=@perlExpr nextgroup=perlVarMember,perlVarSimpleMember,perlMethod
  syn region perlVarBlock2 matchgroup=perlVarPlain start="[%&*]\$*{" skip="\\}" end="}" contains=@perlExpr nextgroup=perlVarMember,perlVarSimpleMember,perlMethod
  syn match perlVarPlain2 "[%&*]\$*{\I\i*}" nextgroup=perlVarMember,perlVarSimpleMember,perlMethod
  syn match perlVarPlain "\%(\$#\|[@$]\)\$*{\I\i*}" nextgroup=perlVarMember,perlVarSimpleMember,perlMethod
  syn region perlVarMember matchgroup=perlVarPlain start="\%(->\)\={" skip="\\}" end="}" contained contains=@perlExpr nextgroup=perlVarMember,perlVarSimpleMember,perlMethod
  syn match perlVarSimpleMember "\%(->\)\={\s*\I\i*\s*}" nextgroup=perlVarMember,perlVarSimpleMember,perlMethod contains=perlVarSimpleMemberName contained
  syn match perlVarSimpleMemberName "\I\i*" contained
  syn region perlVarMember matchgroup=perlVarPlain start="\%(->\)\=\[" skip="\\]" end="]" contained contains=@perlExpr nextgroup=perlVarMember,perlVarSimpleMember,perlMethod
  syn match perlPackageConst "__PACKAGE__" nextgroup=perlMethod
  syn match perlMethod "->\$*\I\i*" contained nextgroup=perlVarSimpleMember,perlVarMember,perlMethod
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 transparent 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
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 "\s\+if" contained
syn keyword perlElseIfError elseif

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

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


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

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

" 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=+/[cgimopsx]*+ contains=@perlInterpSlash


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

" 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[cds]*+ contained
syn region perlTranslationGQ matchgroup=perlMatchStartEnd start=+(+ end=+)[cds]*+ contains=perlParensSQ contained
syn region perlTranslationGQ matchgroup=perlMatchStartEnd start=+\[+ end=+\][cds]*+ contains=perlBracketsSQ contained
syn region perlTranslationGQ matchgroup=perlMatchStartEnd start=+{+ end=+}[cds]*+ contains=perlBracesSQ contained
syn region perlTranslationGQ matchgroup=perlMatchStartEnd start=+<+ end=+>[cds]*+ contains=perlAnglesSQ contained


" Strings and q, qq, qw and qr expressions

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

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

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

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

" 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=+}[imosx]*+ contains=@perlInterpMatch,perlBracesDQ,perlComment keepend
syn region perlQQ matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!qr\s*<+ end=+>[imosx]*+ contains=@perlInterpMatch,perlAnglesDQ,perlComment keepend
syn region perlQQ matchgroup=perlStringStartEnd start=+\<\%(::\|'\|->\)\@<!qr\s*\[+ end=+\][imosx]*+ contains=@perlInterpMatch,perlBracketsDQ,perlComment keepend

" 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.
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=+<<\s*\(['"]\=\)\z(END_\%(SUB\|OF_FUNC\|OF_AUTOLOAD\)\)\1+ 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=+<<\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
if v:version == 701 && !has('patch221') " XXX I hope that's the right one
    syn match perlSubAttributes ":" contained
else
    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
    syn match perlSubAttributes "" contained nextgroup=perlSubError
    syn match perlSubAttributes ":\_s*" contained nextgroup=@perlSubAttrMaybe
endif
syn match perlSubPrototypeError "(\%(\_s*\%(\%(\\\%([$@%&*]\|\[[$@%&*]\+\]\)\|[$&*]\|[@%]\%(\_s*)\)\@=\|;\%(\_s*[)$@%&*\\]\)\@=\|_\%(\_s*[);]\)\@=\)\_s*\)*\)\@>\zs\_[^)]\+" contained
syn match perlSubPrototype +(\_[^)]*)\_s*\|+ nextgroup=perlSubAttributes contained contains=perlSubPrototypeError
syn match perlSubName +\%(\h\|::\|'\w\)\%(\w\|::\|'\w\)*\_s*\|+ contained nextgroup=perlSubPrototype

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

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

" 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
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")
" 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")
    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

  if exists("perl_fold_blocks")
    syn region perlBlockFold start="^\z(\s*\)\%(if\|elsif\|unless\|for\|while\|until\|given\)\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

command -nargs=+ HiLink hi def link <args>

" 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 Keyword
HiLink perlSubName Function
HiLink perlSubPrototype Type
HiLink perlSubAttributes PreProc
HiLink perlSubAttributesCont perlSubAttributes
HiLink perlComment Comment
HiLink perlTodo Todo
if exists("perl_string_as_statement")
  HiLink perlStringStartEnd perlStatement
else
  HiLink perlStringStartEnd perlString
endif
HiLink perlVStringV perlStringStartEnd
HiLink perlList perlStatement
HiLink perlMisc perlStatement
HiLink perlVarPlain perlIdentifier
HiLink perlVarPlain2 perlIdentifier
HiLink perlArrow perlIdentifier
HiLink perlFiledescRead perlIdentifier
HiLink perlFiledescStatement perlIdentifier
HiLink perlVarSimpleMember perlIdentifier
HiLink perlVarSimpleMemberName perlString
HiLink perlVarNotInMatches perlIdentifier
HiLink perlVarSlash perlIdentifier
HiLink perlQQ perlString
HiLink perlHereDoc perlString
HiLink perlStringUnexpanded perlString
HiLink perlSubstitutionSQ perlString
HiLink perlSubstitutionGQQ perlString
HiLink perlTranslationGQ 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 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 perlStatementInclude perlStatement
HiLink perlStatementProc perlStatement
HiLink perlStatementSocket perlStatement
HiLink perlStatementIPC perlStatement
HiLink perlStatementNetwork perlStatement
HiLink perlStatementPword perlStatement
HiLink perlStatementTime perlStatement
HiLink perlStatementMisc perlStatement
HiLink perlStatementIndirObj 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 perlDATA perlComment

" Possible errors
HiLink perlNotEmptyLine Error
HiLink perlElseIfError Error
HiLink perlSubPrototypeError Error
HiLink perlSubError Error

delcommand HiLink

" 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"

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