package FOO;
    
    use strict;
    use warnings;
    
    use Attribute::Handlers;
    
    use base 'Exporter';
    our @EXPORT = qw(__RETRY);
    
    sub __RETRY : ATTR(CODE) {
        my ($pkg, $sym, $code) = @_;
    
        no warnings 'redefine';
    
        *{ $sym } = sub
        {
            my $self = $_[0];
            my $result;
            print ("Executing subroutine\n");
            $result = $code->();
            if ($result)
            {
                print "You Pass\n";
            }
            else
            {
                print "You Fail\n";
            }
        }
    }
    
    sub foo : __RETRY
    {
        print "Executing Foo\n";
        return 1;
    }
    
    1;

##</code><code>##

    require "FOO.pm";
    FOO->import();
    FOO::foo();

##</code><code>##

    Executing Foo

##</code><code>##

    use FOO;
    FOO::foo();

##</code><code>##

    Executing subroutine
    Executing Foo
    You Pass