NAME
Class::MakeMethods::ReadMe - About This Module
SYNOPSIS
# Follow your standard download, test and install sequence
perl -MCPAN -e 'install Class::MakeMethods'
# Generates methods for your object when you "use" it.
package MyObject;
use Class::MakeMethods::Standard::Hash (
'new' => [ 'new' ],
'scalar' => [ 'foo', 'bar' ]
);
# The resulting methods can be called exactly as normal ones
package main;
my $obj = MyObject->new( foo => "Foozle", bar => "Bozzle" );
print $obj->foo();
$obj->bar("Barbados");
MOTIVATION
"Make easy things easier."
This module addresses a problem encountered in object-oriented
development wherein numerous methods are defined which differ only
slightly from each other.
A common example is accessor methods for hash-based object attributes,
which allow you to get and set the value $self->{'foo'} by calling a
method $self->foo().
These methods are generally quite simple, requiring only a couple of
lines of Perl, but in sufficient bulk, they can cut down on the
maintainability of large classes.
Class::MakeMethods allows you to simply declare those methods to be of a
predefined type, and it generates and installs the necessary methods in
your package at compile-time.
DESCRIPTION
The Class::MakeMethods framework allows Perl class developers to quickly
define common types of methods. When a module "use"s a subclass of
Class::MakeMethods, it can select from the supported method types, and
specify a name for each method desired. The methods are dynamically
generated and installed in the calling package.
Construction of the individual methods is handled by subclasses. This
delegation approach allows for a wide variety of method-generation
techniques to be supported, each by a different subclass. Subclasses can
also be added to provide support for new types of methods.
Over a dozen subclasses are available, including implementations of a
variety of different method-generation techniques. Each subclass
generates several types of methods, with some supporting their own
open-eneded extension syntax, for hundreds of possible combinations of
method types.
RELATED MODULES
Class::MakeMethods is based on Class::MethodMaker, but has been
substantially revised in order to provide a range of new features.
Although earlier versions of this module were posted for review as a
possible "version 2" of MethodMaker, the maintainer of that module
subsequently indicated that that he had different goals for future
development and suggested a fork. (Full backward compatibility is
provided by an emulator, described below.)
There are a variety of related modules on CPAN; I've included a quick
review of several of these in the Class::MakeMethods::RelatedModules
manpage. In comparison, this module aims to be quite general purpose and
extensible while retaining acceptable performance characteristics.
Emulation Adaptors
In several cases, Class::MakeMethods provides functionality closely
equivalent to that of an existing module, and it is simple to map the
existing module's interface to that of Class::MakeMethods.
Class::MakeMethods::Emulator is available as a separate distribution
from CPAN. See the Class::MakeMethods::Emulator manpage for more
information. Emulators are included for Class::MethodMaker,
Class::Accessor::Fast, Class::Data::Inheritable, Class::Singleton, and
Class::Struct, each of which passes the original module's test suite,
usually requiring only a single-line change.
INSTALLATION
You should be able to install this module using the CPAN shell
interface:
perl -MCPAN -e 'install Class::MakeMethods'
If this module has not yet been posted to your local CPAN mirror, you
may also retrieve the current distribution from the below address and
follow the normal "gunzip", "tar xf", "cd", "perl Makefile.PL && make
test && sudo make install" procedure or your local equivalent:
http://www.evoscript.org/Class-MakeMethods/
Getting Started
If this is your first exposure to Class::MakeMethods, you may want to
jump to the documentation for a few of the included subclasses, perhaps
starting with the Class::MakeMethods::Standard::Hash manpage and the
Class::MakeMethods::Standard::Universal manpage, before returning to the
details presented below.
PREREQUISITES
In general, this module should work with Perl 5.003 or later, without
requring any modules beyond the core Perl distribution.
Certain features may be available only on some platforms, as noted
below:
* Class::MakeMethods::Attribute
The ":MakeMethod" subroutine attribute requires Perl version 5.6 and
the Attribute::Handlers module (CPAN).
Tested Platforms
This release has been tested succesfully on the following platforms:
5.6.1 on darwin
Earlier releases have also tested on the following platforms:
5.005_02 on Rhapsody
5.005_03 on sun4-solaris: PASS as of 1.0.13
v5.6.0 on sun4-solaris: PASS as of 1.0.13
v5.6.1 on WinNT: PASS as of 1.0.14.a (was TEST FAILURE as of 1.0.13)
v5.6.? on RedHat 7.1 i386: TEST FAILURE as of 1.0.13
v5.6.1 on ppc-linux-64all: FAIL as of 1.0.12
5.004 on MacOS (MacPerl 520r4): PASS as of 1.0.6
5.005 on WinNT (ActivePerl 618): PASS as of 1.0.6
You may also review the current test results from CPAN-Testers:
http://testers.cpan.org/search?request=dist&dist=Class-MakeMethods
VERSION
This is version 1.003 of Class::MakeMethods.
Distribution Summary
This module's summary in the CPAN DSLIP is intended to read:
Name DSLIP Description
-------------- ----- ---------------------------------------------
Class::
::MakeMethods bdpOp Generate common types of methods
Beta Release
While numerous additional features have been outlined for future
development, the intent is support these by adding more options to the
declaration interface, while maintaining backward compatibility.
Discussion and Support
There is not currently any offical discussion and support forum for this
pacakage.
If you have questions or feedback about this module, please feel free to
contact the author at the below address.
I would be particularly interested in any suggestions towards improving
the documentation, correcting any Perl-version or platform dependencies,
as well as general feedback and suggested additions.
SEE ALSO
For an overview of this package, see the Class::MakeMethods manpage.
If you're just getting started, see the Class::MakeMethods::Standard
manpage for a listing of common method generators.
If you need a bit more flexibility, see the
Class::MakeMethods::Composite manpage for method generators which offer
more customization options.
For the largest collection of methods and options, see the
Class::MakeMethods::Template manpage, available as a separate
distribution on CPAN.
If you have used Class::MethodMaker, you will note numerous
similarities. Backward compatibility and conversion documentation is
provded in the Class::MakeMethods::Emulator::MethodMaker manpage,
available in a separate distribution on CPAN.
CREDITS AND COPYRIGHT
Developed By
M. Simon Cavalletto,
[email protected]
Evolution Softworks, www.evoscript.org
Source Material
Inspiration, cool tricks, and blocks of useful code for this module were
extracted from the following CPAN modules:
Class::MethodMaker, by Peter Seibel.
Class::Accessor, by Michael G Schwern
Class::Contract, by Damian Conway
Class::SelfMethods, by Toby Everett
Feedback and Suggestions
Thanks to:
Martyn J. Pearce
Scott R. Godin
Ron Savage
Jay Lawrence
Adam Spiers
Terrence Brannon
Copyright
Copyright 2002 Matthew Simon Cavalletto.
Portions copyright 1998, 1999, 2000, 2001 Evolution Online Systems, Inc.
Portions copyright 1996 Organic Online.
Portions copyright 2000 Martyn J. Pearce.
License
You may use, modify, and distribute this software under the same terms
as Perl.