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rbs.hpp
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00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
00002 /*
00003  *  Main authors:
00004  *     Guido Tack <tack@gecode.org>
00005  *
00006  *  Copyright:
00007  *     Guido Tack, 2012
00008  *
00009  *  Last modified:
00010  *     $Date: 2013-07-11 12:30:18 +0200 (Thu, 11 Jul 2013) $ by $Author: schulte $
00011  *     $Revision: 13840 $
00012  *
00013  *  This file is part of Gecode, the generic constraint
00014  *  development environment:
00015  *     http://www.gecode.org
00016  *
00017  *  Permission is hereby granted, free of charge, to any person obtaining
00018  *  a copy of this software and associated documentation files (the
00019  *  "Software"), to deal in the Software without restriction, including
00020  *  without limitation the rights to use, copy, modify, merge, publish,
00021  *  distribute, sublicense, and/or sell copies of the Software, and to
00022  *  permit persons to whom the Software is furnished to do so, subject to
00023  *  the following conditions:
00024  *
00025  *  The above copyright notice and this permission notice shall be
00026  *  included in all copies or substantial portions of the Software.
00027  *
00028  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00029  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00030  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00031  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00032  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00033  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00034  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00035  *
00036  */
00037 
00038 #include <gecode/search/support.hh>
00039 #include <gecode/search/meta/rbs.hh>
00040 
00041 namespace Gecode {
00042 
00043   namespace Search {
00044     GECODE_SEARCH_EXPORT Engine* rbs(Space* s,
00045                                      MetaStop* stop,
00046                                      Engine* e,
00047                                      const Options& o);
00048   }
00049 
00050   template<template<class> class E, class T>
00051   forceinline
00052   RBS<E,T>::RBS(T* s, const Search::Options& m_opt) {
00053     if (m_opt.cutoff == NULL)
00054       throw Search::UninitializedCutoff("RBS::RBS");
00055     Search::Options e_opt(m_opt);
00056     e_opt.clone = true;
00057     Search::MetaStop* ms = new Search::MetaStop(m_opt.stop);
00058     e_opt.stop = ms;
00059     Space* master;
00060     if (m_opt.clone) {
00061       if (s->status(ms->m_stat) == SS_FAILED) {
00062         ms->m_stat.fail++;
00063         master = NULL;
00064       } else {
00065         master = s->clone();
00066       }
00067     } else {
00068       master = s;
00069     }
00070     E<T> engine(dynamic_cast<T*>(master),e_opt);
00071     EngineBase* eb = &engine;
00072     Search::Engine* ee = eb->e;
00073     eb->e = NULL;
00074     e = Search::rbs(master,ms,ee,m_opt);
00075   }
00076 
00077   template<template<class> class E, class T>
00078   forceinline T*
00079   RBS<E,T>::next(void) {
00080     return dynamic_cast<T*>(e->next());
00081   }
00082 
00083   template<template<class> class E, class T>
00084   forceinline Search::Statistics
00085   RBS<E,T>::statistics(void) const {
00086     return e->statistics();
00087   }
00088 
00089   template<template<class> class E, class T>
00090   forceinline bool
00091   RBS<E,T>::stopped(void) const {
00092     return e->stopped();
00093   }
00094 
00095 
00096   template<template<class> class E, class T>
00097   forceinline T*
00098   rbs(T* s, const Search::Options& o) {
00099     RBS<E,T> r(s,o);
00100     return r.next();
00101   }
00102 
00103 }
00104 
00105 // STATISTICS: search-other