Something like this:
package SF;
use strict;
use warnings;
use overload
'.' => 'catSF';
sub new {
my ($class, $str, $list) = @_;
return bless {str => $str, list => $list}, $class;
}
sub catSF {
my ($lhs, $rhs) = @_;
$lhs = SF->new ("$lhs") if defined $lhs && ! ref $lhs;
$rhs = SF->new ("$rhs") if defined $rhs && ! ref $rhs;
$lhs = SF->new ("$lhs") if defined $lhs && ! $lhs->isa ('SF');
$rhs = SF->new ("$rhs") if defined $rhs && ! $rhs->isa ('SF');
return SF->new ("$lhs->{str}$rhs->{str}", $lhs->{list}, $rhs->{lis
+t});
}
package main;
my $name = SF->new ('GrandFather', [1, 2, 3]);
my $catStr = "Name is $name";
print ref $catStr;
Prints:
SF
True laziness is hard work
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