I prefer ?-> because it makes it clear that there might not be a receiver for the message send ->, much more than ~> which suggests that some kind of pattern or smart match is involved. In the Groovy language, they call it the Safe Navigation Operator e.g. 
def streetName = user?.address?.street

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In reply to Re: What operator should perl5porters use for safe dereferencing? by Arunbear
in thread What operator should perl5porters use for safe dereferencing? by de-merphq

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