package Base;

# Base class to experiment with private and protected methods

use warnings;
use strict;
use Carp;

sub new {
        my $type = shift;
        my $class = ref $type || $type;
        my $self = {
                TEXT => undef,
                SECRET => undef,
                NOTSOSECRET => undef,
        };
        my $closure = sub {
                my $field = shift;
                if (@_) { $self->{$field} = shift; }
                return $self->{$field};
        };
        bless ($closure,$class);
        return $closure;
}

# a public accessor to set TEXT
sub text { &{ $_[0] }("TEXT", @_[1 .. $#_]) }

# a private accessor to set SECRET
sub private {
        caller(0) eq __PACKAGE__ || confess "private method";
        &{ $_[0] }("SECRET", @_[1 .. $#_]); 
}

# a public accessor to set SECRET by means of the private method
sub secret {
        private($_[0],@_[1 .. $#_]);
}

# a protected accessor to set NOTSOSECRET
sub protected {
        caller(0)->isa(__PACKAGE__) || confess "protected method\n";
        &{ $_[0] }("NOTSOSECRET", @_[1 .. $#_]); 
}

1;