values-singleton.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, 2007
 *
 *  Last modified:
 *     $Date: 2008-12-05 16:43:57 +0100 (Fri, 05 Dec 2008) $ by $Author: schulte $
 *     $Revision: 7989 $
 *
 *  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,
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 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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 */

namespace Gecode { namespace Iter { namespace Values {

  class Singleton {
  protected:
    bool done;
    int v;
  public:


    Singleton(void);
    Singleton(int v);
    void init(int v);



    bool operator ()(void) const;
    void operator ++(void);



    int val(void) const;
  };


  forceinline
  Singleton::Singleton(void) {}

  forceinline
  Singleton::Singleton(int v0)
    : done(false), v(v0) {}

  forceinline void
  Singleton::init(int v0) {
    done=false; v=v0;
  }

  forceinline void
  Singleton::operator ++(void) {
    done=true;
  }
  forceinline bool
  Singleton::operator ()(void) const {
    return !done;
  }

  forceinline int
  Singleton::val(void) const {
    return v;
  }


}}}

// STATISTICS: iter-any