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  " 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 property
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 setn...
syn keyword perlStatementPword		getpwuid getpwnam getpwent setpwent endpwent getgrent getgrgid getlogin getgrnam setgrent endgrent
syn keyword perlStatementTime		gmtime localtime time times
syn keyword perlStatementClassDot   isa_String isa_Int isa_File isa_Code isa_Hash isa_Array isa_Object

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,perlVa...
  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