Beefy Boxes and Bandwidth Generously Provided by pair Networks
Syntactic Confectionery Delight
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
Inspired by the discussion of How to use Inheritance with Inside-Out Classes and Hash Based Classes, I have added the capability for Object::InsideOut objects to inherit from non-Object::InsideOut classes. (I refer to this as foreign inheritance in the POD.) Thus, using Object::InsideOut, you can now sub-class other Perl classes, and have access to their methods from your own inside-out objects.

Here's a quick-and-dirty sample that illustrates foreign inheritance using Object::InsideOut v1.18:

use strict; use warnings; # Borg is a foreign hash-based class package Borg; { # A regular hash-based constructor sub new { return (bless({}, shift)); } # A 'get' accessor sub get_borg { my ($self, $data) = @_; return ($self->{$data}); } # A 'put' accessor sub set_borg { my ($self, $key, $value) = @_; $self->{$key} = $value; } # A class method sub assimilate { return ('Resistance is futile'); } } # Foo is an Object::InsideOut class that inherits from class Borg package Foo; { use Object::InsideOut qw(Borg); # A data field with standard 'get_/set_' accessors my @foo :Field('Standard'=>'foo'); # Our class's 'contructor' sub init :Init { my ($self, $args) = @_; # Create a Borg object and inherit from it my $borg = Borg->new(); $self->inherit($borg); } # A class method sub comment { return ('I have no comment to make at this time'); } } package main; # Inheritance works on class m +ethods print(Foo->comment(), "\n"); # Call a 'native' class meth +od print(Foo->assimilate(), "\n"); # Call a 'foreign' class met +hod my $obj = Foo->new(); # Create our object $obj->set_foo('I like foo'); # Set data inside our object print($obj->get_foo(), "\n"); # Get data from our object $obj->set_borg('ID' => 'I am 5-of-7'); # Set data inside inherited ob +ject print($obj->get_borg('ID'), "\n"); # Get data from inherited obje +ct
Other points of interest:
  • Muliple inheritance is supported with any mix of Object::InsideOut and foreign classes.
  • The encapsulation of the inherited objects is strong, meaning that only the class where the inheritance takes place has direct access to the inherited object.
  • Disinheritance is supported to remove the association with an inherited object.
Any comments or suggestions from my fellow monks would be greatly appreciated. Enjoy.

Remember: There's always one more bug.

In reply to Inside-out objects inheriting from hash-based classes by jdhedden

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others musing on the Monastery: (5)
    As of 2019-11-17 12:31 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?
      Strict and warnings: which comes first?



      Results (86 votes). Check out past polls.

      Notices?