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Callback::Cleanup
Declare callbacks that clean themselves up

Callback::Cleanup - Declare callbacks that clean themselves up



NAME

Callback::Cleanup - Declare callbacks that clean themselves up


SYNOPSIS


        use Callback::Cleanup;

        my $anon_sub = callback {

                # this is the sub body

        } cleanup {

                # this is called on DESTROY

        }

        # or

        Callback::Cleanup->new(

                sub { }, # callback

                sub { }, # cleanup

        );


DESCRIPTION

This is a very simple module that provides syntactic sugar for callbacks that need to finalize somehow.

Callbacks are very convenient APIs when they have no definite end of life. If an end of life behavior is required this helps keep the cleanup code and callback code together.


EXPORTS

callback BLOCK $cleanup
cleanup BLOCK $callback
Both of these exports act as the identity function when given only one parameter.

When given enough arguments they will create a Callback::Cleanup object.

This means that you can declare a callback with a cleanup like this:


        my $cleans_up = callback {

        } cleanup {

        

        }

Or a derived sub that cleans up an existing subref:


        my $cleans_up = cleanup {

        } \&needs_cleanup;

As well as a few other useless forms.


AUTHOR

Yuval Kogman <nothingmuch@woobling.org>


COPYRIGHT & LICENSE


        Copyright (c) 2006 the aforementioned authors. All rights

        reserved. This program is free software; you can redistribute

        it and/or modify it under the same terms as Perl itself.
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