07 Sep 2004 21:45:34 UTC
- Distribution: Class-MakeMethods
- Module version: 1.008
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- KwaliteeBus factor: 0
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Class::MakeMethods::Template::Inheritable - Overridable data
package MyClass; use Class::MakeMethods( 'Template::Inheritable:scalar' => 'foo' ); # We now have an accessor method for an "inheritable" scalar value MyClass->foo( 'Foozle' ); # Set a class-wide value print MyClass->foo(); # Retrieve class-wide value my $obj = MyClass->new(...); print $obj->foo(); # All instances "inherit" that value... $obj->foo( 'Foible' ); # until you set a value for an instance. print $obj->foo(); # This now finds object-specific value. ... package MySubClass; @ISA = 'MyClass'; print MySubClass->foo(); # Intially same as superclass, MySubClass->foo('Foobar'); # but overridable per subclass, print $subclass_obj->foo(); # and shared by its instances $subclass_obj->foo('Fosil');# until you override them... ...
The MakeMethods subclass provides accessor methods that search an inheritance tree to find a value. This allows you to set a shared or default value for a given class, and optionally override it in a subclass.
The following methods from Generic should be supported:
scalar string string_index (?) number boolean (?) bits (?) array (?) hash (?) tiedhash (?) hash_of_arrays (?) object (?) instance (?) array_of_objects (?) code (?) code_or_scalar (?)
See Class::MakeMethods::Template::Generic for the interfaces and behaviors of these method types.
The items marked with a * above are specifically defined in this package, whereas the others are formed automatically by the interaction of this package's generic settings with the code templates provided by the Generic superclass.
The items marked with a ? above have not been tested sufficiently; please inform the author if they do not function as you would expect.
See Class::MakeMethods for general information about this distribution.
See Class::MakeMethods::Template for more about this family of subclasses.
See Class::MakeMethods::Template::Generic for information about the various accessor interfaces subclassed herein.
If you just need scalar accessors, see Class::Data::Inheritable for a very elegant and efficient implementation.
Module Install Instructions
To install Class::MakeMethods, copy and paste the appropriate command in to your terminal.
perl -MCPAN -e shell install Class::MakeMethods
For more information on module installation, please visit the detailed CPAN module installation guide.
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