==> -- a binary operator

==> -- a binary operator

This operator is right associative.

New methods must be installed with installMethod, because the parsing precedence is so low! This will be fixed eventually.

This operator may be used as a binary operator in an expression like x ==> y. The user may install binary methods for handling such expressions with code such as

              X ==> Y := (x,y) -> ...

where X is the class of x and Y is the class of y.

Methods for ==> :

{...} ==> Function -- attaching options to a function

OptionTable ==> Function -- attaching options to a function