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.\"
.IX Title "MakeMethods::Emulator::Singleton 3pm"
.TH MakeMethods::Emulator::Singleton 3pm "2004-09-06" "perl v5.10.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
Class::MakeMethods::Emulator::Singleton \- Emulate Class::Singleton
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  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();
.Ve
.SH "COMPATIBILITY"
.IX Header "COMPATIBILITY"
This module emulates the functionality of Class::Singleton, using Class::MakeMethods to generate similar methods.
.PP
You may use it directly, as shown in the \s-1SYNOPSIS\s0 above,
.PP
Furthermore, you may call  \f(CW\*(C`use Class::MakeMethods::Emulator::Singleton \*(Aq\-take_namespace\*(Aq;\*(C'\fR 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 \f(CW\*(C`use Class::MakeMethods::Emulator::Singleton \*(Aq\-release_namespace\*(Aq\*(C'\fR.
.PP
\&\fBCaution:\fR This affects \fBall\fR subsequent uses of Class::Singleton in your program, including those in other modules, and might cause unexpected effects.
.SH "DESCRIPTION"
.IX Header "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.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
See Class::MakeMethods for general information about this distribution.
.PP
See Class::MakeMethods::Emulator for more about this family of subclasses.
.PP
See Class::Singleton for documentation of the original module.
.PP
For a description and discussion of the Singleton class, see 
\&\*(L"Design Patterns\*(R", Gamma et al, Addison-Wesley, 1995, \s-1ISBN\s0 0\-201\-63361\-2.
.PP
See \*(L"new\*(R" in Class::MakeMethods::Hash and \*(L"instance\*(R" in Class::MakeMethods::ClassVar for documentation of the created methods.