Perl 6
WITCH lpointy: Revision 5
^ Mnemonics
arrowhead, less than, sideways V for "values"
-- has multiple uses
----
^ Used alone
< as an infix operator performs a "comparison"<http://perlcabal.org/syn/S03.html#Chained_comparisons>
^ Used as a brace pair or quote pair
<> is shorthand for the qw "quoted array constructor"<http://perlcabal.org/syn/S03.html#Changes_to_Perl_5_operators>, providing string context
<> can "treat things as a hash" like {}, but provides an uninterpolated string context. (e.g. %hash<value>)
<> can be used in Pair constructors in place of {}, providing uninterpolated string context (e.g. :key<value>)
^ Operators containing this character
<= is a "comparison"<http://perlcabal.org/syn/S03.html#Chained_comparisons>. Note this means there is no assignment mutation.
~< +< and ?< left "bitwise shifts"<http://perlcabal.org/syn/S03.html#Changes_to_Perl_5_operators>
<== or <<== a "feed operator"<http://perlcabal.org/syn/S03.html#Feed_operators> («== is not)
^ Other uses
<< can be used as a "Texas Quote", a substitute for « ("left french quote"[WITCH lfrench]) in environments where unicode source code is undesireable
^ Old, deprecated, or other language uses
<< is bitwise shift in many languages including perl5. That is now +<, ~<, or ?<
arrowhead, less than, sideways V for "values"
-- has multiple uses
----
^ Used alone
< as an infix operator performs a "comparison"<http://perlcabal.org/syn/S03.html#Chained_comparisons>
^ Used as a brace pair or quote pair
<> is shorthand for the qw "quoted array constructor"<http://perlcabal.org/syn/S03.html#Changes_to_Perl_5_operators>, providing string context
<> can "treat things as a hash" like {}, but provides an uninterpolated string context. (e.g. %hash<value>)
<> can be used in Pair constructors in place of {}, providing uninterpolated string context (e.g. :key<value>)
^ Operators containing this character
<= is a "comparison"<http://perlcabal.org/syn/S03.html#Chained_comparisons>. Note this means there is no assignment mutation.
~< +< and ?< left "bitwise shifts"<http://perlcabal.org/syn/S03.html#Changes_to_Perl_5_operators>
<== or <<== a "feed operator"<http://perlcabal.org/syn/S03.html#Feed_operators> («== is not)
^ Other uses
<< can be used as a "Texas Quote", a substitute for « ("left french quote"[WITCH lfrench]) in environments where unicode source code is undesireable
^ Old, deprecated, or other language uses
<< is bitwise shift in many languages including perl5. That is now +<, ~<, or ?<
