#!/usr/bin/perl
use warnings;
use strict;

package Class::GetSet;

sub new { my $class = shift; return bless({@_}, $class) }
sub __set { $_[0]->{ $_[1] } = $_[2] }
sub __get { return $_[0]->{ $_[1] } }

use vars qw($AUTOLOAD);

sub AUTOLOAD
{
   no strict 'refs';
   if ($AUTOLOAD =~ /^.*::(\w+)$/o && exists $_[0]->__has->{$1}->{'read'} )  {
                my $attr = $1;
                *{$AUTOLOAD} = sub { my $s = shift; return ($s->__get($attr, @_)) };
                goto &$AUTOLOAD;
        } elsif ($AUTOLOAD =~ /^.*::set_(\w+)$/o && exists $_[0]->__has->{$1}->{'write'} ) {
                my $attr = $1;
                *{$AUTOLOAD} = sub { my $s = shift; return ($s->__set($attr, @_)) };
                goto &$AUTOLOAD;
        }
        # subs like DESTROY
        return if $AUTOLOAD =~ /^.*::[A-Z]+$/;
        die "Unimplemented $AUTOLOAD";
}


                                                                                                                                                                      
package Dummy;
                                                                                                                                                                      
use base qw(Class::GetSet);
sub __has { return { foo => { read => 1, write => 1 }, bar => { read => 1 } } }
                                                                                                                                                                      
package main;
                                                                                                                                                                      
my $d = Dummy->new( foo => 1, bar => 2);
print "foo = '". $d->foo ."'\n";
$d->set_foo( 'xxx' );
print "foo = '". $d->foo ."'\n";
                                                                                                                                                                      
print "bar = '". $d->bar ."'\n";
$d->set_boo( 'xxx' );