Devel::Events::Match(3)

NAME
Devel::Events::Match - Event matching, splicing and dicing.

VERSION
version 0.10

SYNOPSIS
        use Devel::Events::Match;

        my $matcher = Devel::Events::Match->new;

        my @matching = $matcher->grep( match => $cond, events => \@events );

DESCRIPTION
This class provides event list filtering, chunking etc based on a simple match format.

This class is used by Devel::Events::Handler::Log::Memory in order to ease access into the event log.

METHODS

compile_cond
    Used to compile condition values into code references.

    Scalars become equality tests on the first element (event type/name matches this).

    Hashes become recursive conditions, where each key is matched on the field. The 'type' pseudofield is the first element of the event. Every value in the hash gets "compile_cond" called on it recursively.

    Code references are returned verbatim.

    The output is a code reference that can be used to match events.

first %args
    Return the first event that matches a certain condition.

    Requires the "match" and "events" parameters.

grep %args
    Return the list of events that match a certain condition.

    Requires the "match" and "events" parameters.

limit from => $cond, to => $cond, %args
    Return events between two events. If "from" or "to" is omitted then it returns all the events up to or from the other filter ("from" defaults to "sub { 1 }" and "to" defaults to "sub { 0 }").

    If either the "from_inclusive" and "to_inclusive" parameters are provided and set to false then the range will only begin on the event after the "from" match and end on the event before the "to" match respectively.

    Requires the "events" parameter.

chunk %args
    Cuts the event log into chunks. When $marker matches a new chunk is opened.

    Requires the "marker" and "events" parameters.

    The "first" and "last" parameters, when provided and false will cause the first and last chunks to be dropped, respectively.

    The first chunk contains all the events up to the first matching one.

take_while %args
take_until %args
drop_while %args
drop_until %args
    Require the "match" and "events" parameters.

SUPPORT
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>).

AUTHOR
יובל קוג'מן (Yuval Kogman) <nothingmuch@woobling.org>

COPYRIGHT AND LICENCE
This software is copyright (c) 2007 by יובל קוג'מן (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.