I can

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Re: I can by jdalbec (Deacon) on Jul 01, 2006 at 21:31 UTC
The funny thing is that even though `I->can()` doesn't return an error, `I->can("can")` returns `undef`. So `I` can `can()`, but `I->can`not `("can")`. perldoc UNIVERSAL says: Perl magically makes these functions [`isa`, `can`, and `VERSION`] act as methods on all objects. so I guess that's just Perl magic at work. Update: in view of ikegami's reply, maybe this is a documentation bug as well. Perhaps `s/these functions/all functions in package UNIVERSAL/`?	[reply] [d/l] [select]
Re^2: I can by ikegami (Patriarch) on Jul 01, 2006 at 22:05 UTC
Not quite. There's nothing special about those functions. The magic is Perl acting as if UNIVERSAL was in @ISA when doing a method call. Apparently, `can` doesn't. Bug! `>perl -wle "{ package UNIVERSAL; sub test { '!' } } print I->can('test +')?1:0;" 0 >perl -wle "{ package UNIVERSAL; sub test { '!' } } print I->test;" !` [download] The interesting part is that neither the argument nor the return value of `can` matters in that snippet.	[reply] [d/l] [select]