I haven't quit worked it out yet, but I think I would do something where if "methods" had a second arguement that was a blessed ref, it would not create a new blessed ref, but would just use the blessed ref it was given. Something like this:

#!/usr/bin/perl
package Foo;
use Class::FIOC;
use strict;
sub new {
  my $class = shift;
  my $foo_thing = shift;
  my $subclass = shift || 0;
  methods {
    foo_thing=>sub {
       print "My foo_thing=$foo_thing\n";
    }
  },$subclass;
}




#!/usr/bin/perl
package Bar;
use Foo;
our @ISA qw(Foo);
use Class::FIOC;
use strict;
sub new {
  my $class = shift;
  my $bar_thing = shift;
  my $self = methods {
    bar_thing=>sub {
       print "My bar_thing=$bar_thing\n";
    }
  }
  return Foo->new("Hello",$self);
}
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