bool-delta.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, 2016
 *
 *  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
 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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 */

namespace Gecode {

  forceinline
  BoolTraceDelta::BoolTraceDelta(Int::BoolTraceView, Int::BoolView n,
                                 const Delta&)
    : delta(1-n.val()) {}
  forceinline bool
  BoolTraceDelta::operator ()(void) const {
    return delta >= 0;
  }
  forceinline void
  BoolTraceDelta::operator ++(void) {
    delta = -1;
  }
  forceinline int
  BoolTraceDelta::min(void) const {
    return delta;
  }
  forceinline int
  BoolTraceDelta::max(void) const {
    return delta;
  }
  forceinline unsigned int
  BoolTraceDelta::width(void) const {
    return 1U;
  }

}

// STATISTICS: int-trace