NAME

Sub::Multi::Tiny - Multisubs/multimethods (multiple dispatch) yet another way!

SYNOPSIS

    {
        package main::my_multi;     # We're making main::my_multi()
        use Sub::Multi::Tiny qw($foo $bar);     # All possible params

        sub first :M($foo, $bar) { # sub's name will be ignored
            return $foo ** $bar;
        }

        sub second :M($foo) {
            return $foo + 42;
        }

    }

    # Back in package main, my_multi() is created just before the run phase.
    say my_multi("a scalar", "and some more");  # -> "first"
    say my_multi("just a scalar");              # -> "second"

Limitation: At present, dispatch is solely by arity, and only one candidate can have each arity. This limitation will be removed in the future.

DESCRIPTION

Sub::Multi::Tiny is a library for making multisubs, aka multimethods, aka multiple-dispatch subroutines.

TODO explain: if sub MakeDispatcher() exists in the package, it will be called to create the dispatcher.

DEBUGGING

For extra debug output, set "$VERBOSE" in Sub::Multi::Tiny to a positive integer. This has to be set at compile time to have any effect. For example, before creating any multisubs, do:

    use Sub::Multi::Tiny::Util '*VERBOSE';
    BEGIN { $VERBOSE = 2; }

RATIONALE / SEE ALSO

TODO explain why yet another module!

Class::Multimethods

Class::Multimethods::Pure

Dios

Logic

This one is fairly clean, but uses a source filter. I have not had much experience with source filters, so am reluctant.

Kavorka::Manual::MultiSubs (and Moops)

MooseX::MultiMethods

I am not ready to move to full Moose!

MooseX::Params

As above.

Sub::Multi

Sub::SmartMatch

This one looks very interesting, but I haven't used smartmatch enough to be fully comfortable with it.

SUPPORT

You can find documentation for this module with the perldoc command.

    perldoc Sub::Multi::Tiny

You can also look for information at:

• GitHub: The project's main repository and issue tracker

  https://github.com/cxw42/Sub-Multi-Tiny

• MetaCPAN

  Sub::Multi::Tiny

• This distribution

  See the tests in the t/ directory distributed with this software for examples.

BUGS

This isn't Damian code ;) .

AUTHOR

Chris White <cxw@cpan.org>

LICENSE

Copyright (C) 2019 Chris White <cxw@cpan.org>

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.