The weird thing, however, is that the result of using SUPER depends on the package where you use it and not on the object instance. I modified chromatic's code to demonstrate this:

use strict;
package A;

sub new {
    my $pkg = shift;
    bless {}, $pkg;
}

sub first {
    print "A::first\n";
}

sub second {
    print "A::second\n";
}
sub check {
    my $this = shift;
    my $pkg = ref $this;
    print "\nResults of check:\n";
    foreach my $subname (qw(first SUPER::first second SUPER::second)) 
+{
        if (defined (my $sub = $this->can ($subname))) {
            print ("$pkg can $subname\n");
            $this->$sub ();
        }
        else {
            print "$pkg cannot do $subname\n";
        }
    }    
}


package A_sub;
@A_sub::ISA = qw(A);

sub first {
    print "A_sub::first\n";
}    

sub check_sub {
    my $this = shift;
    my $pkg = ref $this;
    print "\nResults of check_sub:\n";
    foreach my $subname (qw(first SUPER::first second SUPER::second)) 
+{
        if (defined (my $sub = $this->can ($subname))) {
            print ("$pkg can $subname\n");
            $this->$sub ();
        }
        else {
            print "$pkg cannot do $subname\n";
        }
    }    
}


package main;
my $asub = new A_sub;
$asub->check ();
$asub->check_sub ();
[download]

This prints:

Results of check:
A_sub can first
A_sub::first
A_sub cannot do SUPER::first
A_sub can second
A::second
A_sub cannot do SUPER::second

Results of check_sub:
A_sub can first
A_sub::first
A_sub can SUPER::first
A::first
A_sub can second
A::second
A_sub can SUPER::second
A::second
[download]

Did everybody out there know this? I was quite surprised of the result.

pike

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