Sort::Key::Types(3pm)					User Contributed Perl Documentation				     Sort::Key::Types(3pm)

NAME

       Sort::Key::Types - handle Sort::Key data types

SYNOPSIS

	 use Sort::Key::Types qw(register_type);
	 register_type(Color => sub { $_->R, $_->G, $_->B }, qw(int, int, int));

	 # you better
	 # use Sort::Key::Register ...

DESCRIPTION

       The Sort::Key family of modules can be extended to support new key types using this module (or the more friendly Sort::Key::Register).

   FUNCTIONS
       The following functions are provided:

       Sort::Key::register_type($name, &gensubkeys, @subkeystypes)
	   registers a new datatype named $name defining how to convert it to a multikey.

	   &gensubkeys should convert the object of type $name passed on $_ to a list of values composing the multikey.

	   @subkeystypes is the list of types for the generated multikeys.

	   For instance:

	     Sort::Key::Types::register_type
			    'Person',
			    sub { $_->surname,
				  $_->name,
				  $_->middlename },
			    qw(str str str);

	     Sort::Key::Types::register_type
			    'Color',
			    sub { $_->R, $_->G, $_->B },
			    qw(int int int);

	   Once a datatype has been registered it can be used in the same way as types supported natively, even for defining new types, i.e.:

	     Sort::Key::Types::register_type
			    'Family',
			    sub { $_->father, $_->mother },
			    qw(Person Person);

SEE ALSO

       Sort::Key, Sort::Key::Merger, Sort::Key::Register.

COPYRIGHT AND LICENSE

       Copyright (C) 2005-2007 by Salvador Fandin~o, <sfandino@yahoo.com>.

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.4 or,
       at your option, any later version of Perl 5 you may have available.

perl v5.14.2							    2012-06-30						     Sort::Key::Types(3pm)