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Postings from February 2001
>>>>> "TB" == Tim Bunce <Tim.Bunce@ig.co.uk> writes: TB> As a part of that the weak reference concept, bolted recently into TB> perl5, could be made more central in perl6. TB> Around 92.769% of the time circular references are known to be TB> circular by the code that creates them (like a 'handy' ref back to TB> a parent node). Having a weakref, or similar, operator in the TB> language would help greatly. i second this. i am doing just what tim mentions. i have a child and parent object referring back to each other for callback purposes. the parent needs to own the child and the child has to have a parent ref to make a method callback in the parent. there is no way out of creating circular refs in that situation. i have to do an explicit object shutdown so i don't leak ram. this isn't a big problem in stem since you have to explicitly unregister stuff as well (that can't be done with scope exit) but it would still be nice not to have to worry about the ref loops. uri -- Uri Guttman --------- uri@sysarch.com ---------- http://www.sysarch.com SYStems ARCHitecture, Software Engineering, Perl, Internet, UNIX Consulting The Perl Books Page ----------- http://www.sysarch.com/cgi-bin/perl_books The Best Search Engine on the Net ---------- http://www.northernlight.comThread Previous | Thread Next