|Perl Monk, Perl Meditation|
Re^8: ref to read-only alias ... why? (eval)by LanX (Bishop)
|on Jan 09, 2012 at 21:46 UTC||Need Help??|
> That's an overstatement. The only thing that can be impacted is a sub that tries to modify an alias and then gets passed a read-only value and where that situation isn't just declared a bug and gets fixed.
> If no error is ever thrown, then nobody knows and nobody cares and there is nothing to fix.
Wrong, as you can see from the code I posted, not only the sub is affected, but the intended side-effect (of altering the call-by-reference argument) is missing without warning.
in continuation of Re^3: ref to read-only alias ... why? (not consistent)
> So, yes, exactly as I said, the worst possible case can be solved by adding a simple eval around the code that modifies the reference
How is eval supposed to help here?
> but is (badly) designed to also tolerate the failure in the case of read-only parameters.
So in your opinion manipulating $_ is a bad design!?!
Could you please post some code-examples to illustrate your point of view?