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 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.