class::makemethods::emulator::singleton(3pm) [debian man page]

MakeMethods::Emulator::Singleton(3pm)			User Contributed Perl Documentation		     MakeMethods::Emulator::Singleton(3pm)

NAME

       Class::MakeMethods::Emulator::Singleton - Emulate Class::Singleton

SYNOPSIS

	 use Class::MakeMethods::Emulator::Singleton;

	 # returns a new instance
	 my $one = Class::MakeMethods::Emulator::Singleton->instance();

	 # returns same instance
	 my $two = Class::MakeMethods::Emulator::Singleton->instance();

COMPATIBILITY

       This module emulates the functionality of Class::Singleton, using Class::MakeMethods to generate similar methods.

       You may use it directly, as shown in the SYNOPSIS above,

       Furthermore, you may call  "use Class::MakeMethods::Emulator::Singleton '-take_namespace';" to alias the Class::Singleton namespace to this
       package, and subsequent calls to the original package will be transparently handled by this emulator. To remove the emulation aliasing,
       call "use Class::MakeMethods::Emulator::Singleton '-release_namespace'".

       Caution: This affects all subsequent uses of Class::Singleton in your program, including those in other modules, and might cause unexpected
       effects.

DESCRIPTION

       A Singleton describes an object class that can have only one instance in any system.  An example of a Singleton might be a print spooler or
       system registry.  This module implements a Singleton class from which other classes can be derived.  By itself, the Class::Singleton module
       does very little other than manage the instantiation of a single object.  In deriving a class from Class::Singleton, your module will
       inherit the Singleton instantiation method and can implement whatever specific functionality is required.

SEE ALSO

       See Class::MakeMethods for general information about this distribution.

       See Class::MakeMethods::Emulator for more about this family of subclasses.

       See Class::Singleton for documentation of the original module.

       For a description and discussion of the Singleton class, see "Design Patterns", Gamma et al, Addison-Wesley, 1995, ISBN 0-201-63361-2.

       See "new" in Class::MakeMethods::Hash and "instance" in Class::MakeMethods::ClassVar for documentation of the created methods.

perl v5.10.1							    2004-09-06				     MakeMethods::Emulator::Singleton(3pm)

MakeMethods::Emulator::Struct(3pm)			User Contributed Perl Documentation			MakeMethods::Emulator::Struct(3pm)

NAME

       Class::MakeMethods::Emulator::Struct - Emulate Class::Struct

SYNOPSIS

	 use Class::MakeMethods::Emulator::Struct;

	 struct (
	     simple  => '$',
	     ordered => '@',
	     mapping => '%',
	     obj_ref => 'FooObject'
	 );

DESCRIPTION

       This module emulates the functionality of Class::Struct by munging the provided field-declaration arguments to match those expected by
       Class::MakeMethods.

       It supports the same four types of accessors, the choice of array-based or hash-based objects, and the choice of installing methods in the
       current package or a specified target.

EXAMPLE

       The below three declarations create equivalent methods for a simple hash-based class with a constructor and four accessors.

	 use Class::Struct;
	 struct (
	     simple  => '$',
	     ordered => '@',
	     mapping => '%',
	     obj_ref => 'FooObject'
	 );

	 use Class::MakeMethods::Emulator::Struct;
	 struct (
	     simple  => '$',
	     ordered => '@',
	     mapping => '%',
	     obj_ref => 'FooObject'
	   );

	 use Class::MakeMethods (
	     -MakerClass	       => 'Standard::Array',
	     'new'		       => 'new',
	     'scalar'		       => 'simple',
	     'array -auto_init 1'      => 'ordered',
	     'hash -auto_init 1'       => 'mapping',
	     'object -auto_init 1'     => '-class FooObject obj_ref'
	   );

COMPATIBILITY

       This module aims to offer a "95% compatible" drop-in replacement for the core Class::Struct module for purposes of comparison and code
       migration.

       The "class-struct.t" test for the core Class::Struct module is included with this package. The test is unchanged except for the a direct
       substitution of this emulator's name in the place of the core module.

       However, there are numerous internal differences between the methods generated by the original Class::Struct and this emulator, and some
       existing code may not work correctly without modification.

SEE ALSO

       See Class::MakeMethods for general information about this distribution.

       See Class::MakeMethods::Emulator for more about this family of subclasses.

       See Class::Struct for documentation of the original module.

       See Class::MakeMethods::Standard::Hash and Class::MakeMethods::Standard::Array for documentation of the created methods.

perl v5.10.1							    2004-09-06					MakeMethods::Emulator::Struct(3pm)