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Ok, then how will this work: $class = MyModule::MySubModule;

The obvious answer to that question is: It won't work.

This is giving error for wrong syntax.

Unsurprising. If your code isn't syntactically correct, you will get an error.

Is there a subroutine called MySubModule in the package MyModule?

If not, what do think $class will end up containing?

The lesson here is that if you make stuff up when asking a question, instead of showing the actual problem code; the answers you get probably won't work for your actual code. So stop being ... and ask the real question you want answered!


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In reply to Re^3: Threads Calling Subroutine from different PM File by BrowserUk
in thread Threads Calling Subroutine from different PM File by anshumangoyal

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    [hippo]: Understood. I'll have to go through the code and see if it's doing anything fancy with ties, dual-vars or non-scalars. In the end, it's probably a bug though.
    [Corion]: Aaah - you should be able to do this with overload, but I would hit somebody really hard if they constructed objects that are true but the empty string, and you not knowing about the domain knowledge where this makes sense
    [Eily]: you could tie a variable into not having the same value each time, if you like to make people who try to debug your code facepalm
    [Corion]: perl -wle 'package o; use overload q("") => sub {warn "str"; ""}, bool => sub{warn "bool"; 1}; package main; my $o={}; bless $o => o; print "Yay" if ($o && !length($o))'
    [Corion]: But people writing such code should document the objects they construct and why it makes sense for an object to be invisible as string while being true in a boolean context
    [hippo]: That's equal parts clever and horrendous.
    [Eily]: the overload version wouldn't return true with "$x" && !length $x though, I guess
    [hippo]: The more I look at this code, the more $x is a plain old scalar and the more this condition will never be true. I'm calling it a bug at this point.
    [hippo]: Thanks for your input which has soothed my sanity (a little)

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