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Devel::Events::Filter(3) User Contributed Perl Documentation Devel::Events::Filter(3)

Devel::Events::Filter - A handler role that filters events and delegates to another

version 0.09

        package MyFilter;
        use Moose;

        with qw/Devel::Events::Filter/;

        sub filter_event {
                my ( $self, @event ) = @_;

                return (map { ... } @event);
        }

This role allows you to build event filters easily:

To use this role you must provide the "filter_event" method.

This role provides an optional "handler" attribute and a "new_event" method, and does the Devel::Events::Handler role implicitly.

If a sub handler was provided then the filtered event will be delegated to it, but due to the usefulness of filters as debugging aids this is currently optional.

In the future this design choice might change.

handler
A Devel::Events::Handler to delegate to.

new_event @event
Filters the event through "filter_event".

If "handler" is set, delegates the filtered event to the handler. If not "no_handler_error" is called instead.

no_handler_error @filtered_event
This method is called if no handler is present. It is a stub, but in the future it may raise an error.

Devel::Events, Devel::Events::Handler, Devel::Events::Filter::Stamp, Devel::Events::Filter::Warn

Bugs may be submitted through the RT bug tracker <https://rt.cpan.org/Public/Dist/Display.html?Name=Devel-Events> (or bug-Devel-Events@rt.cpan.org <mailto:bug-Devel-Events@rt.cpan.org>).

XXXX XXX'XX (Yuval Kogman) <nothingmuch@woobling.org>

This software is copyright (c) 2007 by XXXX XXX'XX (Yuval Kogman).

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

2018-03-27 perl v5.32.1

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