diff --git a/mode/perl.py b/mode/perl.py
index 442c575..27b713e 100644
--- a/mode/perl.py
+++ b/mode/perl.py
@@ -111,12 +111,18 @@ class PerlGrammar(Grammar):
         PatternRule('perl.keyword', "(?<!->)(?:STDIN|STDERR|STDOUT|continue|do|else|elsif|eval|foreach|for|if|last|my|next|our|package|require|return|sub|undef|unless|until|use|while)(?![a-zA-Z0-9_])"),
         PatternRule('perl.hash_key', '(?<={)' + wchr2 + '+(?=})'),
         PatternRule('perl.method', '(?<=->)' + word1),
+        #PatternMatchRule('x', '(' + wchr2 + '+)( *)(=>)'
+        #                 'perl.hash_key', 'spaces', 'delimiter'),
         PatternRule('perl.hash_key', wchr2 + '+(?= *=>)'),
         PatternRule('perl.length', r"\$#" + word2),
+        #PatternMatchRule('x', r'([\$\@\%\&\*])( *)({)',
+        #                 'perl.cast', 'spaces', 'delimiter'),
         PatternRule('perl.cast', r'[\$\@\%\&\*](?= *{)'),
         PatternRule('perl.scalar', r"\$[\[\]<>ab/'\"_@\?#\$!%^|&*()](?!" +
                     wchr2 + ")"),
         PatternRule('perl.array', "@_"),
+        #PatternMatchRule('x', r"(\$\$*" + word2 + ")(->)( *)(\()",
+        #                 'perl.function', 'delimiter', 'spaces', 'delimiter'),
         PatternRule('perl.function', r"\$\$*" + word2 + "(?=-> *\()"),
         PatternRule('perl.scalar', r"\$\$*" + word2),
         PatternRule('perl.array', r"@\$*" + word2),