---
name: "MooseX::AbstractMethod"
section: "3pm"
platform: "linux"
package: "libmoosex-abstractmethod-perl"
version: "0.004-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/MooseX::AbstractMethod"
---

# MooseX::AbstractMethod(3pm)

Declare methods requirements that must be satisfied

## NAME

MooseX::AbstractMethod - Declare methods requirements that must be satisfied

## VERSION

This document describes version 0.004 of MooseX::AbstractMethod - released August 31, 2012 as part of MooseX-AbstractMethod.

## SYNOPSIS

```
    use Moose;
    use MooseX::Abstract;
    requires 'bar';
    # synonm to 'requires'
    abstract 'foo';
```

## DESCRIPTION

This extensions allows classes to flag certain methods as being required to be implemented by a subclass, much as a Moose::Role does with 'requires'.

## USAGE

As in the synopsis, simply mark certain methods as being required by subclasses by passing their names to "abstract" or "requires".  This will cause a method of the same name to be installed in the class that will die horribly if it's ever called.  Additionally, when a class is made immutable, all of its methods are checked to see if they're marked as abstract; if any abstract methods exists that were not created in the current class, we die horribly.

Checking for method satisfaction on make\_immutable isn't perfect, but AFAICT it's the most reasonable approach possible at the moment.  (Corrections welcome.)

## NEW SUGAR

### abstract

**abstract()** allows one to declare a method dependency that must be satisfied by a subclass before it is invoked, and before the subclass is made immutable.

```
    abstract 'method_name_that_must_be_satisfied';
```

### requires

**requires()** is a synonym for **abstract()** and works in the way you'd expect.

## SOURCE

The development version is on github at \<http://github.com/RsrchBoy/moosex-abstractmethod\> and may be cloned from \<git://github.com/RsrchBoy/moosex-abstractmethod.git\>

## BUGS

Please report any bugs or feature requests on the bugtracker website https://github.com/RsrchBoy/moosex-abstractmethod/issues

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.

## AUTHOR

Chris Weyl \<cweyl@alumni.drew.edu\>

## COPYRIGHT AND LICENSE

This software is Copyright (c) 2011 by Chris Weyl.

This is free software, licensed under:

```
  The GNU Lesser General Public License, Version 2.1, February 1999
```