/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
 *  Main authors:
 *     Guido Tack <tack@gecode.org>
 *
 *  Copyright:
 *     Guido Tack, 2005
 *
 *  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
 *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */

#include "test/set.hh"

using namespace Gecode;

namespace Test { namespace Set {

  /// %Tests for distinctness constraints
  namespace Distinct {

    /**
      * \defgroup TaskTestSetDistinct Distinctness constraints
      * \ingroup TaskTestSet
      */
    //@{

    static IntSet ds_33(-2,2);
    static IntSet ds_44(-4,4);

    /// %Test for the atmostone propagator
    class AtmostOne : public SetTest {
    public:
      /// Create and register test
      AtmostOne(const char* t)
        : SetTest(t,3,ds_33,false) {}
      /// %Test whether \a x is solution
      virtual bool solution(const SetAssignment& x) const {
        {
          CountableSetRanges xr0(x.lub, x[0]);
          CountableSetRanges xr1(x.lub, x[1]);
          Iter::Ranges::Inter<CountableSetRanges,CountableSetRanges>
            i(xr0,xr1);
          if (Iter::Ranges::size(i)>1)
            return false;
        }
        {
          CountableSetRanges xr0(x.lub, x[0]);
          CountableSetRanges xr2(x.lub, x[2]);
          Iter::Ranges::Inter<CountableSetRanges,CountableSetRanges>
            i(xr0,xr2);
          if (Iter::Ranges::size(i)>1)
            return false;
        }
        {
          CountableSetRanges xr1(x.lub, x[1]);
          CountableSetRanges xr2(x.lub, x[2]);
          Iter::Ranges::Inter<CountableSetRanges,CountableSetRanges>
            i(xr1,xr2);
          if (Iter::Ranges::size(i)>1)
            return false;
        }
        {
          CountableSetRanges xr0(x.lub, x[0]);
          CountableSetRanges xr1(x.lub, x[1]);
          CountableSetRanges xr2(x.lub, x[2]);
          if (Iter::Ranges::size(xr0)!=3 ||
              Iter::Ranges::size(xr1)!=3 ||
              Iter::Ranges::size(xr2)!=3)
            return false;
        }
        return true;
      }
      /// Post constraint on \a x
      virtual void post(Space& home, SetVarArray& x, IntVarArray&) {
        SetVar s1(home, IntSet::empty, -2, 2, 0U, 1U);
        Gecode::rel(home, x[0], SOT_INTER, x[1], SRT_EQ, s1);
        SetVar s2(home, IntSet::empty, -2, 2, 0U, 1U);
        Gecode::rel(home, x[0], SOT_INTER, x[2], SRT_EQ, s2);
        SetVar s3(home, IntSet::empty, -2, 2, 0U, 1U);
        Gecode::rel(home, x[1], SOT_INTER, x[2], SRT_EQ, s3);
        Gecode::atmostOne(home, x, 3);
      }
    };
    AtmostOne _atmostone("Distinct::AtmostOne");

    //@}

}}}

// STATISTICS: test-set