libept
utils.h
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00001 /*
00002  * Ready-made utility classes for Debtags
00003  *
00004  * Copyright (C) 2003--2007  Enrico Zini <enrico@debian.org>
00005  *
00006  * This program is free software; you can redistribute it and/or modify
00007  * it under the terms of the GNU General Public License as published by
00008  * the Free Software Foundation; either version 2 of the License, or
00009  * (at your option) any later version.
00010  *
00011  * This program is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  * GNU General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU General Public License
00017  * along with this program; if not, write to the Free Software
00018  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00019  */
00020 
00021 #ifndef EPT_DEBTAGS_UTILS_H
00022 #define EPT_DEBTAGS_UTILS_H
00023 
00024 #include <wibble/mixin.h>
00025 #include <ept/debtags/tag.h>
00026 
00027 namespace ept {
00028 namespace debtags {
00029 
00034 template<typename OUT>
00035 class TagToFacet : public wibble::mixin::OutputIterator< TagToFacet<OUT> >
00036 {
00037 protected:
00038     OUT out;
00039 
00040 public:
00041     TagToFacet(const OUT& out) : out(out) {}
00042 
00043     template<typename ITEMS, typename TAGS>
00044     TagToFacet<OUT>& operator=(const std::pair<ITEMS, TAGS>& data)
00045     {
00046         std::set< Facet > facets;
00047         for (typename TAGS::const_iterator i = data.second.begin();
00048                 i != data.second.end(); ++i)
00049             facets.insert(i->facet());
00050         *out = make_pair(data.first, facets);
00051         ++out;
00052         return *this;
00053     }
00054 };
00055 
00056 template<typename OUT>
00057 static TagToFacet<OUT> tagToFacet(const OUT& out)
00058 {
00059     return TagToFacet<OUT>(out);
00060 }
00061 
00062 }
00063 }
00064 
00065 // vim:set ts=4 sw=4:
00066 #endif