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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!
With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.