64 lines
2.7 KiB
C++
64 lines
2.7 KiB
C++
/* vim: set sw=4 sts=4 et foldmethod=syntax : */
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/*
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* Copyright (c) 2010, 2011, 2013 Ciaran McCreesh
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*
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* This file is part of the Paludis package manager. Paludis is free software;
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* you can redistribute it and/or modify it under the terms of the GNU General
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* Public License version 2, as published by the Free Software Foundation.
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*
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* Paludis is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <paludis/resolver/reason_utils.hh>
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#include <paludis/resolver/reason.hh>
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using namespace paludis;
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using namespace paludis::resolver;
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bool
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paludis::resolver::is_target(const std::shared_ptr<const Reason> & reason)
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{
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return reason->make_accept_returning(
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[&] (const DependencyReason &) { return false; },
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[&] (const DependentReason &) { return false; },
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[&] (const WasUsedByReason &) { return false; },
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[&] (const PresetReason &) { return false; },
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[&] (const ViaBinaryReason &) { return false; },
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[&] (const TargetReason &) { return true; },
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[&] (const LikeOtherDestinationTypeReason & r, const Revisit<bool, Reason> & revisit) {
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return revisit(*r.reason_for_other());
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},
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[&] (const SetReason & r, const Revisit<bool, Reason> & revisit) {
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return revisit(*r.reason_for_set());
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}
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);
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}
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const std::shared_ptr<const PackageID>
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paludis::resolver::maybe_from_package_id_from_reason(const std::shared_ptr<const Reason> & reason)
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{
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return reason->make_accept_returning(
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[&] (const DependencyReason & r) { return r.from_id(); },
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[&] (const DependentReason &) { return nullptr; },
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[&] (const WasUsedByReason &) { return nullptr; },
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[&] (const PresetReason &) { return nullptr; },
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[&] (const ViaBinaryReason &) { return nullptr; },
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[&] (const TargetReason &) { return nullptr; },
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[&] (const LikeOtherDestinationTypeReason & r, const Revisit<std::shared_ptr<const PackageID>, Reason> & revisit) {
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return revisit(*r.reason_for_other());
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},
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[&] (const SetReason & r, const Revisit<std::shared_ptr<const PackageID>, Reason> & revisit) {
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return revisit(*r.reason_for_set());
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}
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);
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}
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