There are disambiguation rules, for example:

• If the -> is followed by braces or brackets, it's a hash or array lookup
• Otherwise, if the LHS is a blessed reference, it's dispatched as a method call
• If the LHS is a package name, the RHS is interpreted as a sub and the first arg is the LHS (this is quasi identical to the previous case).

I'm sure there are more rules, but in general it does what I mean (dwim) ;-)

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