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# Copyright © 1998 Richard Braakman # Copyright © 1999 Darren Benham # Copyright © 2000 Sean 'Shaleh' Perry # Copyright © 2004 Frank Lichtenheld # Copyright © 2006 Russ Allbery # Copyright © 2007-2009 Raphaël Hertzog <hertzog@debian.org> # Copyright © 2008-2009, 2012-2014 Guillem Jover <guillem@debian.org> # # This program is free software; you may redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # This is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see <https://www.gnu.org/licenses/>. package Dpkg::Deps::Union; =encoding utf8 =head1 NAME Dpkg::Deps::Union - list of unrelated dependencies =head1 DESCRIPTION This class represents a list of relationships. It inherits from Dpkg::Deps::Multiple. =cut use strict; use warnings; our $VERSION = '1.00'; use parent qw(Dpkg::Deps::Multiple); =head1 METHODS =over 4 =item $dep->output([$fh]) The output method uses ", " to join the list of relationships. =cut sub output { my ($self, $fh) = @_; my $res = join(', ', map { $_->output() } grep { not $_->is_empty() } $self->get_deps()); if (defined $fh) { print { $fh } $res; } return $res; } =item $dep->implies($other_dep) =item $dep->get_evaluation($other_dep) These methods are not meaningful for this object and always return undef. =cut sub implies { # Implication test is not useful on Union. return; } sub get_evaluation { # Evaluation is not useful on Union. return; } =item $dep->simplify_deps($facts) The simplification is done to generate an union of all the relationships. It uses $simple_dep->merge_union($other_dep) to get its job done. =cut sub simplify_deps { my ($self, $facts) = @_; my @new; WHILELOOP: while (@{$self->{list}}) { my $odep = shift @{$self->{list}}; foreach my $dep (@new) { next WHILELOOP if $dep->merge_union($odep); } push @new, $odep; } $self->{list} = [ @new ]; } =back =head1 CHANGES =head2 Version 1.00 (dpkg 1.15.6) Mark the module as public. =cut 1;