Parsing/interpolation question

I ran into an issue creating hashes with IP addresses as a key. They don't do what you'd expect them to do (at least not what I expected). In other words, $hash{192.168.1.1} isn't the same as $hash{'192.168.1.1'}

I understand what's between the "{" and "}" is subject to interpolation, but I don't understand what perl interpolation rules apply.

What I found is that something like 192.168.1.1 seems to parsed/interpolated as chr(192) . chr(168) . chr(1) . chr(1)

I would have expected that if any interpolation were to be done on 192.168.1.1 the periods would be parsed as a string append giving the result "19216811", which coincidently, is how $x = 192 . 168 . 1 . 1 is parsed. 

Is there any documentation of this behavior?



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