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bool-expr.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, 2004
00008  *
00009  *  Last modified:
00010  *     $Date: 2009-10-12 17:36:53 +0200 (Mon, 12 Oct 2009) $ by $Author: schulte $
00011  *     $Revision: 9878 $
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 namespace Gecode {
00039 
00040   /*
00041    * Operations for expressions
00042    *
00043    */
00044 
00045   forceinline
00046   BoolExpr::BoolExpr(const BoolExpr& e) : n(e.n) {
00047     n->use++;
00048   }
00049 
00050   forceinline BoolVar
00051   BoolExpr::post(Home home, IntConLevel icl) const {
00052     Region r(home);
00053     return NNF::nnf(r,n,false)->post(home,icl);
00054   }
00055 
00056   forceinline void
00057   BoolExpr::post(Home home, bool t, IntConLevel icl) const {
00058     Region r(home);
00059     return NNF::nnf(r,n,false)->post(home,t,icl);
00060   }
00061 
00062 
00063   inline BoolExpr
00064   operator &&(const BoolExpr& l, const BoolExpr& r) {
00065     return BoolExpr(l,BoolExpr::NT_AND,r);
00066   }
00067 
00068   inline BoolExpr
00069   operator ||(const BoolExpr& l, const BoolExpr& r) {
00070     return BoolExpr(l,BoolExpr::NT_OR,r);
00071   }
00072 
00073   inline BoolExpr
00074   operator ^(const BoolExpr& l, const BoolExpr& r) {
00075     return BoolExpr(BoolExpr(l,BoolExpr::NT_EQV,r),BoolExpr::NT_NOT);
00076   }
00077 
00078   template<class Var>
00079   inline BoolExpr
00080   operator ~(const LinRel<Var>& rl) {
00081     return BoolExpr(rl);
00082   }
00083 
00084   inline BoolExpr
00085   operator !(const BoolExpr& e) {
00086     return BoolExpr(e,BoolExpr::NT_NOT);
00087   }
00088 
00089 
00090   inline BoolExpr
00091   eqv(const BoolExpr& l, const BoolExpr& r) {
00092     return BoolExpr(l, BoolExpr::NT_EQV, r);
00093   }
00094 
00095   inline BoolExpr
00096   imp(const BoolExpr& l, const BoolExpr& r) {
00097     return BoolExpr(BoolExpr(l,BoolExpr::NT_NOT),
00098                     BoolExpr::NT_OR,r);
00099   }
00100 
00101 
00102   inline BoolVar
00103   post(Home home, const BoolExpr& e, IntConLevel icl) {
00104     return e.post(home,icl);
00105   }
00106 
00107   inline BoolVar
00108   post(Home, const BoolVar& b, IntConLevel) {
00109     return b;
00110   }
00111 
00112 
00113 }
00114 
00115 // STATISTICS: minimodel-any