Re: Is there a way to find out what kind of ref an object is? (isa)

I'd probably use:

BEGIN {
    *isa= \&UNIVERSAL::isa;
}
... isa( $ref, 'HASH' ) ...
[download]

which isn't perfect, but neither are any of the techniques I've seen that aren't unreasonably complicated, unfortunately.

- tye

Comment on Re: Is there a way to find out what kind of ref an object is? (isa) Download Code

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Re^2: Is there a way to find out what kind of ref an object is? (isa) by adrianh (Chancellor) on Dec 07, 2005 at 12:32 UTC
neither are any of the techniques I've seen that aren't unreasonably complicated, unfortunately. Is: `use Scalar::Util qw( reftype ); ... print "$ref is a ", reftype( $ref ), "\n";` [download] unreasonably complicated?	[reply] [d/l]
Re^3: Is there a way to find out what kind of ref an object is? (isa) by tye (Sage) on Dec 07, 2005 at 19:41 UTC
I guess you are assuming that it is perfect. But it isn't. It prevents you from properly handling overloaded objects that know how to act like a hash ref even though they aren't. Of course, it is also overly complicated in many cases. For example, on the version of Perl I have most handy, it simply dies with `Can't locate Scalar/Util.pm` and overcoming that is rather hugely complicated, as it happens. - tye	[reply] [d/l]
Re^4: Is there a way to find out what kind of ref an object is? (isa) by adrianh (Chancellor) on Dec 08, 2005 at 10:36 UTC
But it isn't. It prevents you from properly handling overloaded objects that know how to act like a hash ref even though they aren't. I'd interpreted the OP's requirement as not wanting this behaviour. YMMV. on the version of Perl I have most handy, it simply dies with Can't locate Scalar/Util.pm and overcoming that is rather hugely complicated, as it happens Fair point.	[reply]
Re^3: Is there a way to find out what kind of ref an object is? (isa) by chromatic (Archbishop) on Dec 07, 2005 at 16:57 UTC
It has the misfortune of working correctly, as opposed to ref or `UNIVERSAL::isa()`.	[reply] [d/l]
Re^4: Is there a way to find out what kind of ref an object is? (isa) by adrianh (Chancellor) on Dec 08, 2005 at 10:36 UTC
It has the misfortune of working correctly, as opposed to ref or UNIVERSAL::isa(). Oh I do agree that the number of times that you'd actually want to use reftype, outside pure curiosity and debugging, is pretty darn tiny. However, on the odd occasion when I do need it I find it fortunate to have something that does exactly the job I want and is named properly :-)	[reply]