It is a P5 simulation, without the benefit of P6 lexical subroutines. How do you think this will work?

class ....{
    my sub thingie1 is rw {
        return my $var
            is Proxy( for => $hidden_var,
                      FETCH => { ... },
                      STORE => { ... },
                      TEMP  => { ... },
                      ...
            );
    }
    my sub thingie2 is rw {
        return my $var
            is Proxy( for => $hidden_var,
                      FETCH => { ... },
                      STORE => { ... },
                      TEMP  => { ... },
                      ...
            );
    }
    ...
}
[download]

And, if the ties involved in the my suggestion above, are generated by the compiler, what is to stop them from using the same mechanism as this Apo6 code uses to isolate the tie for one attribute from the tie for another?

The only difference is who writes the code and where. One is inline, clear and trivial with the compiler doing all the drudge work.

The other is, out-of-band, complex, obscure and repetative, requiring the programmer to code lots of little code blocks instead of a simple, inline block of code.