GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  CLASS::MAKEMETHODS::UTILITY::INHERITABLE (3)

.ds Aq ’

NAME

Class::MakeMethods::Utility::Inheritable - "Inheritable" data

CONTENTS

SYNOPSIS



  package MyClass;
  sub new { ... }
 
  package MySubclass;
  @ISA = MyClass;
  ...
  my $obj = MyClass->new(...);
  my $subobj = MySubclass->new(...);
 
  use Class::MakeMethods::Utility::Inheritable qw(get_vvalue set_vvalue );
 
  my $dataset = {};
  set_vvalue($dataset, MyClass, Foobar);    # Set value for class
  get_vvalue($dataset, MyClass);              # Gets value "Foobar"
 
  get_vvalue($dataset, $obj);                   # Objects "inherit"
  set_vvalue($dataset, $obj, Foible);         # Until you override
  get_vvalue($dataset, $obj);                   # Now finds "Foible"
 
  get_vvalue($dataset, MySubclass);           # Subclass "inherits"
  get_vvalue($dataset, $subobj);                # As do its objects
  set_vvalue($dataset, MySubclass, Foozle); # Until we override it
  get_vvalue($dataset, MySubclass);           # Now finds "Foozle"
 
  get_vvalue($dataset, $subobj);                # Change cascades down
  set_vvalue($dataset, $subobj, Foolish);     # Until we override again
 
  get_vvalue($dataset, MyClass);              # Superclass is unchanged



DESCRIPTION

This module provides several functions which allow you to store values in a hash corresponding to both objects and classes, and to retrieve those values by searching a object’s inheritance tree until it finds a matching entry.

This functionality is used by Class::MakeMethods::Standard::Inheritable and Class::MakeMethods::Composite::Inheritable to construct methods that can both store class data and be overriden on a per-object level.

REFERENCE

    find_vself



  $vself = find_vself( $dataset, $instance );



Searches $instance’s inheritance tree until it finds a matching entry in the dataset, and returns either the instance, the class that matched, or undef.

    get_vvalue



  $value = get_vvalue( $dataset, $instance );



Searches $instance’s inheritance tree until it finds a matching entry in the dataset, and returns that value

    set_vvalue



  $value = set_vvalue( $dataset, $instance, $value );



Searches $instance’s inheritance tree until it finds a matching entry in the dataset, and returns that value

Search for    or go to Top of page |  Section 3 |  Main Index


perl v5.20.3 MAKEMETHODS::UTILITY::INHERITABLE (3) 2004-09-06

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.