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

use IO::Scalar;

my $data = 'some sample data here';
my $fh = IO::Scalar->new(\$data);

print {*STDERR} 'ref $fh yields ', ref $fh, "\n";
print_prop('$fh->can("opened")', $fh->can('opened'));
print_prop('$fh->can("seek")', $fh->can('opened'));
print_prop('$fh->can("seekable")', $fh->can('opened'));
print_prop('$fh is IO::Scalar', $fh->isa('IO::Scalar'));
print_prop('$fh->can("opened")', $fh->can("opened"));
print_prop('$fh->opened()', $fh->opened());
print_prop('$fh->can("seek")', $fh->can("seek"));
eval {print_prop('$fh->seek(0, 0)', $fh->seek(0, 0));} or print "$@";
print_prop('$fh is tied', tied $fh);
close $fh;

sub print_prop {
   my ($msg, $flag) = @_;
   print {*STDERR} $msg, '? ', ($flag ? 'yes' : 'no'), "\n";
   return;
}