query_visitor.hh

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00001 /* vim: set sw=4 sts=4 et foldmethod=syntax : */
00002 
00003 /*
00004  * Copyright (c) 2005, 2006, 2007, 2008 Ciaran McCreesh
00005  *
00006  * This file is part of the Paludis package manager. Paludis is free software;
00007  * you can redistribute it and/or modify it under the terms of the GNU General
00008  * Public License version 2, as published by the Free Software Foundation.
00009  *
00010  * Paludis is distributed in the hope that it will be useful, but WITHOUT ANY
00011  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
00012  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
00013  * details.
00014  *
00015  * You should have received a copy of the GNU General Public License along with
00016  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
00017  * Place, Suite 330, Boston, MA  02111-1307  USA
00018  */
00019 
00020 #ifndef PALUDIS_GUARD_PALUDIS_QUERY_VISITOR_HH
00021 #define PALUDIS_GUARD_PALUDIS_QUERY_VISITOR_HH 1
00022 
00023 #include <paludis/dep_list-fwd.hh>
00024 #include <paludis/util/private_implementation_pattern.hh>
00025 #include <paludis/dep_spec-fwd.hh>
00026 
00027 /** \file
00028  * Declarations for QueryVisitor, which is used internally by DepList.
00029  *
00030  * \ingroup g_dep_list
00031  *
00032  * \section Examples
00033  *
00034  * - None at this time.
00035  */
00036 
00037 namespace paludis
00038 {
00039     /**
00040      * Used by DepList to check for existing deps.
00041      *
00042      * \ingroup g_dep_list
00043      * \nosubgrouping
00044      */
00045     class QueryVisitor :
00046         private PrivateImplementationPattern<QueryVisitor>
00047     {
00048         public:
00049             ///\name Basic operations
00050             ///\{
00051 
00052             QueryVisitor(const DepList * const, const std::tr1::shared_ptr<const DestinationsSet> &,
00053                     const Environment * const, const std::tr1::shared_ptr<const PackageID> &);
00054 
00055             ~QueryVisitor();
00056 
00057             ///\}
00058 
00059             ///\name Visitor operations
00060             ///\{
00061 
00062             void visit(const DependencySpecTree::NodeType<AllDepSpec>::Type & node);
00063             void visit(const DependencySpecTree::NodeType<AnyDepSpec>::Type & node);
00064             void visit(const DependencySpecTree::NodeType<ConditionalDepSpec>::Type & node);
00065             void visit(const DependencySpecTree::NodeType<PackageDepSpec>::Type & node);
00066             void visit(const DependencySpecTree::NodeType<BlockDepSpec>::Type & node);
00067             void visit(const DependencySpecTree::NodeType<DependencyLabelsDepSpec>::Type & node);
00068             void visit(const DependencySpecTree::NodeType<NamedSetDepSpec>::Type & node);
00069 
00070             ///\}
00071 
00072             /**
00073              * Are we matched?
00074              */
00075             bool result() const;
00076     };
00077 }
00078 
00079 #endif

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