Re: Tying & Overloading

[Larry Wall]

Nick Ing-Simmons writes:
: >You really have to talk about overloading boolean context
: >in general.
: 
: Only if you are going to execute the result in the normal perl realm.
: Consider using the perl parser to build a parse tree - e.g. one to 
: read perl5 and write perl 6. This works for all expressions except
: &&, || and ?: because perl5 cannot overload those - so 
: 
: $c = ($a && &b) ? $d : $e;
: 
: calls the bool-ness of $a and in the defered execution mode of a translator
: it wants to return not true/false but "it depends on what $a is at run-time".
: It cannot do that and is not passed $b so cannot return 

I think using overloading to write a parser is going to be a relic of
Perl 5's limitations, not Perl 6's.

Larry