NAME

Boundary - declare interface package

SYNOPSIS

Declare interface package IFoo:

    package IFoo {
        use Boundary;

        requires qw(hello world);
    }

Implements the interface package IFoo:

    package Foo {
        use Boundary::Impl qw(IFoo);

        sub hello { ... }
        sub world { ... }
    }

Use the type ImplOf:

    use Boundary::Types -types;
    use Foo;

    my $type = ImplOf['IFoo'];
    my $foo = Foo->new; # implements of IFoo
    $type->check($foo); # pass!

DESCRIPTION

This module provides a interface. Boundary declares abstract functions without implementation and defines an interface package. Bounary::Impl checks if the abstract functions are implemented at compile time.

The difference with Role is that the implementation cannot be reused. namespace::allclean prevents the reuse of the implementation.

LICENSE

Copyright (C) kfly8.

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

AUTHOR

kfly8 <kfly8@cpan.org>