Re: A6: argument initializations via //=, ||=, ::=

[Damian Conway]

Mark Biggar wrote:

sub myprint(+$file is IO:File is rw ::= IO:STDOUT, [EMAIL PROTECTED]) {...}
Should be:

  sub myprint([EMAIL PROTECTED], +$file is IO:File is rw ::= $*OUT) {...}


although maybe what I really want is := instead.
I suspect so. The binding of a parameter is most definitely run-time, so := 
seems to make better sense.

One *might* argue that ::= means that $file was *pre*-bound to $*OUT, and the 
binding is overridden whenever it is actually passed by name, but that then
prevents run-time computation of bound defaults. Unless you allow := as well.

However I still think we're probably multiplying entities unnecessarily.

Damian