"Minor issue: finding the classname (e.g. ref($ret)) is part of deciding if sub returned an error, for example when sub normally returns a blessed object instead of unblessed ref (as in my example)."

Sorry, but I don't understand this. My code using blessed clearly distinguished "Error" from "Success". Your line: 

die "@$ret" if ref($ret) eq 'YouveGotError';

[download]

could be rewritten as: 

die "@$ret" if $err eq 'YouveGotError';

[download]

If I change 'blessed $ret' in my code, to 'ref $ret', the output becomes: 

Run: 1
Error "ARRAY" detected
Code: 42
Errstr: 43
Run: 2
Error "YouveGotError" detected
Code: 0
Errstr: error was ...

[download]

which, I'm pretty sure, is not what you want.

I suspect we may be talking at cross-purposes, or there's some other misunderstanding; however, I've looked back over our posts, and can't see what the problem might be.

"apropos the edits: ..."

No need to apologise. I just wanted to make it clear what I was responding to. There was no intended rebuke or other negativity.

— Ken

In reply to Re^3: Blessing with unknown classnames by kcott
in thread Blessing with unknown classnames by bliako

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