irt.hpp

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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
 *  Main authors:
 *     Christian Schulte <schulte@gecode.org>
 *
 *  Copyright:
 *     Christian Schulte, 2017
 *
 *  This file is part of Gecode, the generic constraint
 *  development environment:
 *     http://www.gecode.org
 *
 *  Permission is hereby granted, free of charge, to any person obtaining
 *  a copy of this software and associated documentation files (the
 *  "Software"), to deal in the Software without restriction, including
 *  without limitation the rights to use, copy, modify, merge, publish,
 *  distribute, sublicense, and/or sell copies of the Software, and to
 *  permit persons to whom the Software is furnished to do so, subject to
 *  the following conditions:
 *
 *  The above copyright notice and this permission notice shall be
 *  included in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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 */

namespace Gecode {

  forceinline IntRelType
  swap(IntRelType irt) {
    switch (irt) {
    case IRT_EQ: return IRT_EQ;
    case IRT_NQ: return IRT_NQ;
    case IRT_LE: return IRT_GR;
    case IRT_LQ: return IRT_GQ;
    case IRT_GR: return IRT_LE;
    case IRT_GQ: return IRT_LQ;
    default: GECODE_NEVER;
    }
    GECODE_NEVER;
    return IRT_EQ; // Avoid compiler warnings
  }

  forceinline IntRelType
  neg(IntRelType irt) {
    switch (irt) {
      case IRT_EQ: return IRT_NQ;
      case IRT_NQ: return IRT_EQ;
      case IRT_GQ: return IRT_LE;
      case IRT_LQ: return IRT_GR;
      case IRT_LE: return IRT_GQ;
      case IRT_GR: return IRT_LQ;
      default: GECODE_NEVER;
    }
    GECODE_NEVER;
    return IRT_EQ; // Avoid compiler warnings
  }


}

// STATISTICS: int-post