FUNCTIONS

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);