I don't see how ::= (compile-time-bind) can be used as the initialize-if-non-existent operator.
I mean, it happens in the wrong phase (compile-time, not run-time) and it does the wrong thing (binding, not assignment).
The only case I can think of where is might be useful is with a optional parameter with an "is rw" trait, so you could provide an default binding. Possible example:
sub myprint(+$file is IO:File is rw ::= IO:STDOUT, [EMAIL PROTECTED]) {...}
open f ">/a/d/v/f/r"; myprint file => f, "Hello World!\n"; # goes to f myprint "Differnet World!\n"; # goes to IO:STDOUT
although maybe what I really want is := instead.
-- Mark Biggar [EMAIL PROTECTED] [EMAIL PROTECTED]
