1MakeMethods::Emulator::USsienrglCeotnotnr(i3b)uted PerlMDaokceuMmeetnhtoadtsi:o:nEmulator::Singleton(3)
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NAME

6       Class::MakeMethods::Emulator::Singleton - Emulate Class::Singleton
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SYNOPSIS

9         use Class::MakeMethods::Emulator::Singleton;
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11         # returns a new instance
12         my $one = Class::MakeMethods::Emulator::Singleton->instance();
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14         # returns same instance
15         my $two = Class::MakeMethods::Emulator::Singleton->instance();
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COMPATIBILITY

18       This module emulates the functionality of Class::Singleton, using
19       Class::MakeMethods to generate similar methods.
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21       You may use it directly, as shown in the SYNOPSIS above,
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23       Furthermore, you may call  "use Class::MakeMethods::Emulator::Singleton
24       '-take_namespace';" to alias the Class::Singleton namespace to this
25       package, and subsequent calls to the original package will be
26       transparently handled by this emulator. To remove the emulation
27       aliasing, call "use Class::MakeMethods::Emulator::Singleton
28       '-release_namespace'".
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30       Caution: This affects all subsequent uses of Class::Singleton in your
31       program, including those in other modules, and might cause unexpected
32       effects.
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DESCRIPTION

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

45       See Class::MakeMethods for general information about this distribution.
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47       See Class::MakeMethods::Emulator for more about this family of
48       subclasses.
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50       See Class::Singleton for documentation of the original module.
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52       For a description and discussion of the Singleton class, see "Design
53       Patterns", Gamma et al, Addison-Wesley, 1995, ISBN 0-201-63361-2.
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55       See "new" in Class::MakeMethods::Hash and "instance" in
56       Class::MakeMethods::ClassVar for documentation of the created methods.
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60perl v5.32.0                      2020-07-28MakeMethods::Emulator::Singleton(3)
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