WITCH equal: Revision 4
"equal", "evaluate", "iterate"
= assigns values as in common parlance
Operators containing this character
:= aliases an identifier via runtime binding
When used inside regexes
= is used to declare aliases and behaves a bit more like := in this usage.
As an adverb
Hyper operator and meta operator restrictions
Old, deprecated, or other language uses
=~ in Perl5 used to be for matching. That is ~~ in Perl6. =~ is always a syntax error in Perl6.