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
$name
defining how to convert it to a multi-key.&gensubkeys
should convert the object of type$name
passed on$_
to a list of values composing the multi-key.@subkeystypes
is the list of types for the generated multi-keys.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, 2014 by Salvador Fandiño, <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.