You can do so with operator overloading and tie-ing. Doing so will incur quite some overhead though. You can see the technique applied in MozRepl::RemoteObject, but I don't think the amount of code and the complexity don't warrant the tiny gains (if any).

package Getter;

use overload '%{}' => 'Getter::as_hash',
             '@{}' => 'Getter::as_array',
             ;

sub as_hash {
    my ($self) = @_;
    # return tied hash
};

sub as_array {
    my ($self) = @_;
    # return tied array
};

sub AUTOLOAD {
    # Map to hash access
}

package Getter::TiedArray;
# Copy the code from MozRepl::RemoteObject and gut the remote function
+ality

package Getter::TiedHash;
# Copy the code from MozRepl::RemoteObject and gut the remote function
+ality
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