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/* vim: set sw=4 sts=4 et foldmethod=syntax : */
/*
* Copyright (c) 2005, 2006, 2007, 2008, 2009, 2010, 2011 Ciaran McCreesh
*
* This file is part of the Paludis package manager. Paludis is free software;
* you can redistribute it and/or modify it under the terms of the GNU General
* Public License version 2, as published by the Free Software Foundation.
*
* Paludis 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, write to the Free Software Foundation, Inc., 59 Temple
* Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef PALUDIS_GUARD_PALUDIS_ADDITIONAL_PACKAGE_DEP_SPEC_REQUIREMENT_HH
#define PALUDIS_GUARD_PALUDIS_ADDITIONAL_PACKAGE_DEP_SPEC_REQUIREMENT_HH 1
#include <paludis/additional_package_dep_spec_requirement-fwd.hh>
#include <paludis/util/sequence.hh>
#include <paludis/util/wrapped_forward_iterator.hh>
#include <paludis/util/tribool-fwd.hh>
#include <paludis/environment-fwd.hh>
#include <paludis/changed_choices-fwd.hh>
#include <paludis/package_id-fwd.hh>
#include <utility>
namespace paludis
{
/**
* An additional requirement for a PackageDepSpec.
*
* \since 0.26
* \ingroup g_dep_spec
*/
class PALUDIS_VISIBLE AdditionalPackageDepSpecRequirement
{
public:
AdditionalPackageDepSpecRequirement() = default;
virtual ~AdditionalPackageDepSpecRequirement();
AdditionalPackageDepSpecRequirement(const AdditionalPackageDepSpecRequirement &) = delete;
AdditionalPackageDepSpecRequirement & operator= (const AdditionalPackageDepSpecRequirement &) = delete;
/**
* Is our requirement met for a given PackageID?
*
* The string in the return type might be a description of why the
* requirement was not met. Sometimes better messages can be given
* than simply the return value of as_human_string() when the ID to
* be matched is known. If the bool is false, the string is
* meaningless.
*
* \param spec_id The PackageID the spec comes from. May be null. Used for
* [use=] style dependencies.
*
* \since 0.44 returns pair<bool, std::string>
* \since 0.51 takes optional ChangedChoices arguments
* \since 0.58 takes id by shared_ptr
* \since 0.58 takes spec_id
*/
virtual const std::pair<bool, std::string> requirement_met(
const Environment * const,
const ChangedChoices * const maybe_changes_to_owner,
const std::shared_ptr<const PackageID> & target_id,
const std::shared_ptr<const PackageID> & spec_id,
const ChangedChoices * const maybe_changes_to_target) const PALUDIS_ATTRIBUTE((warn_unused_result)) = 0;
/**
* If possible, indicate which choices to change to make our
* requirement met for a particular ID.
*
* Verifies that the ID has the appropriate choice, and that that
* choice isn't locked.
*
* Returns true for changes made, false for not possible,
* indeterminate for nothing needs changing.
*
* \param spec_id The PackageID the spec comes from. May be null. Used for
* [use=] style dependencies.
*
* \since 0.51
* \since 0.55 returns Tribool
* \since 0.58 takes spec_id
*/
virtual Tribool accumulate_changes_to_make_met(
const Environment * const,
const ChangedChoices * const maybe_changes_to_owner,
const std::shared_ptr<const PackageID> &,
const std::shared_ptr<const PackageID> & spec_id,
ChangedChoices &) const PALUDIS_ATTRIBUTE((warn_unused_result)) = 0;
/**
* Return a human readable string representation of ourself.
*/
virtual const std::string as_human_string() const PALUDIS_ATTRIBUTE((warn_unused_result)) = 0;
/**
* Return a raw string representation of ourself.
*/
virtual const std::string as_raw_string() const PALUDIS_ATTRIBUTE((warn_unused_result)) = 0;
};
extern template class Sequence<std::shared_ptr<const AdditionalPackageDepSpecRequirement> >;
extern template class WrappedForwardIterator<AdditionalPackageDepSpecRequirements::ConstIteratorTag,
const std::shared_ptr<const AdditionalPackageDepSpecRequirement> >;
}
#endif
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