reg.hpp

00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
00002 /*
00003  *  Main authors:
00004  *     Christian Schulte <schulte@gecode.org>
00005  *
00006  *  Copyright:
00007  *     Christian Schulte, 2008
00008  *
00009  *  Last modified:
00010  *     $Date: 2008-12-08 12:54:44 +0100 (Mon, 08 Dec 2008) $ by $Author: schulte $
00011  *     $Revision: 7995 $
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   template<class Char, class Traits>
00041   std::basic_ostream<Char,Traits>&
00042   REG::Exp::print(std::basic_ostream<Char,Traits>& os) const {
00043     if (this == NULL)
00044       return os << "[]";
00045     switch (type) {
00046     case ET_SYMBOL:
00047       return os << "[" << data.symbol << "]";
00048     case ET_STAR:
00049       {
00050         bool par = ((data.kids[0] != NULL) &&
00051                     ((data.kids[0]->type == ET_CONC) ||
00052                      (data.kids[0]->type == ET_OR)));
00053         return data.kids[0]->print(os << (par ? "*(" : "*"))
00054                                       << (par ? ")" : "");
00055       }
00056     case ET_CONC:
00057       {
00058         bool par0 = ((data.kids[0] != NULL) &&
00059                      (data.kids[0]->type == ET_OR));
00060         std::ostream& os1 = data.kids[0]->print(os << (par0 ? "(" : ""))
00061                                                    << (par0 ? ")+" : "+");
00062         bool par1 = ((data.kids[1] != NULL) &&
00063                      (data.kids[1]->type == ET_OR));
00064         return data.kids[1]->print(os1 << (par1 ? "(" : "") )
00065                                        << (par1 ? ")" : "");
00066       }
00067     case ET_OR:
00068       return data.kids[1]->print(data.kids[0]->print(os) << "|");
00069     default: GECODE_NEVER;
00070     }
00071     GECODE_NEVER;
00072     return os;
00073   }
00074 
00075 
00076   template<class Char, class Traits>
00077   inline std::basic_ostream<Char,Traits>&
00078   REG::print(std::basic_ostream<Char,Traits>& os) const {
00079     std::basic_ostringstream<Char,Traits> s;
00080     s.copyfmt(os); s.width(0);
00081     e->print(s);
00082     return os << s.str();
00083   }
00084 
00085   template<class Char, class Traits>
00086   std::basic_ostream<Char,Traits>&
00087   operator <<(std::basic_ostream<Char,Traits>& os, const REG& r) {
00088     return r.print(os);
00089   }
00090 
00091 }
00092 
00093 // STATISTICS: minimodel-any
00094