Other problems:

How would this work in the proposed scheme? 

sub double
{
   $_[0] *= 2;
}

double($o->foo);

[download]

Also currently 

$o->foo+ *= 2;

[download]
calls foo() once whereas it would need to call twice in the proposed scheme.

In reply to Re^7: Experimenting with Lvalue Subs (trade-offs) by fergal
in thread Experimenting with Lvalue Subs by Limbic~Region

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