On Mon, 15 Sep 2003, Dan Sugalski wrote: > > Great. But will it also be possible to add methods (or modify them) > > to an existing class at runtime? > > Unless the class has been explicitly closed, yes.
That strikes me as back-to-front. The easy-to-optimise case should be the easy-to-type case; otherwise a lot of optimisation that should be possible isn't because the programmers are too inexperienced/lazy/confused to put the "closed" tags in. And it would be a better chance to warn at compile time about doing things which are potentially troublesome. But whichever way this goes, I take it we'll have warnings like: Changed method definition Class::foo may not take effect in pending initialiser at program.pl line 9. Overridden method definition MyClass::foo (new subclass of Class) may not take effect in pending function bar() in zot() at Zot.pm line 5 in other() at Other.pm line 10 at program.pl line 123.
