Any math operation (excluding ==) on a reference that doesnt have the references nummified by 0+$ref and doesnt have the operators in question overloaded in the package the ref is blessed into should warn.
I disagree. That's contrary to Perl's automatic casting for programmer convenience. What's next, concatenation of numbers throws a warning, unless the number is surrounded with quotes? Use of an array as a number throws a warning, unless it's explicitely preceeded with '0+'? Using a string as first argument of split throws a warning, because it isn't surrounded by slashes?

If you want a language that will throw warnings if casting happens implicitely, use C.

I don't think that the attitude of "oh, I made a programming boo-boo, let's add a warning that prevents me from making the boo-boo again" is very productive. It will only annoy people who legitimate use this feature (that has been around for over a decade!) - and it will make people not use use warnings;. Or to not use perl.

Warnings are good. But a warning that triggers at the wrong moment is bad. Very bad. Warnings should never get in the way.

Perl --((8:>*

In reply to Re^2: The trap of reference numification by Perl Mouse
in thread The trap of reference numification by samtregar

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