Try separating instantiation from initialization:
package foo;
use strict;
sub new
{
print "foo::new\n";
my $self = bless( {}, shift );
$self->init(@_);
return $self;
}
sub init
{
print "foo::init\n";
my $self = shift;
my %args = ( foo=>undef, @_ );
$args{foo} = "foo" if ! defined $args{foo};
$self->foo($args{foo});
}
sub foo
{
my $self = shift;
$self->{_foo} = shift if @_;
return $self->{_foo};
}
1;
package bar;
use strict;
sub new
{
print "bar::new\n";
my $self = bless( {}, shift );
$self->init(@_);
return $self;
}
sub init
{
print "bar::init\n";
my $self = shift;
my %args = ( bar=>undef, @_ );
$args{bar} = "bar" if ! defined $args{bar};
$self->bar($args{bar});
}
sub bar
{
my $self = shift;
$self->{_bar} = shift if @_;
return $self->{_bar};
}
1;
package foobar;
use strict;
use foo;
use bar;
use vars(qw(@ISA));
@ISA=qw(foo bar);
sub new
{
print "foobar::new\n";
my $self = bless( {}, shift );
$self->init(@_);
return $self;
}
sub init
{
print "foobar::init\n";
my $self = shift;
my %args = ( @_ );
$self->foo::init(%args);
$self->bar::init(%args);
}
sub getFooBar
{
my $self = shift;
return $self->foo() . $self->bar();
}
1;
use strict;
use foobar;
main();
sub main()
{
my $fb = new foobar( foo=>'Lance', bar=>'Deeply' );
print $fb->getFooBar() ."\n";
}
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