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goto &{$_[0]->{state} = \&stateReadLit};

$_[0]->{state} = \&stateReadLit;  # assign the coderef to the stateRea
+dLit subroutine to the 'state' element of the hash referenced by $_[0
+]
goto &stateReadLit;  # or goto &{ $_[0]->{state} };