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.