overload.hpp

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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
 *  Main authors:
 *     Christian Schulte <schulte@gecode.org>
 *     Guido Tack <tack@gecode.org>
 *
 *  Copyright:
 *     Christian Schulte, 2009
 *     Guido Tack, 2010
 *
 *  This file is part of Gecode, the generic constraint
 *  development environment:
 *     http://www.gecode.org
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namespace Gecode { namespace Int { namespace Cumulative {

  // Overload checking for mandatory tasks
  template<class ManTask>
  ExecStatus
  overload(Space& home, int c, TaskArray<ManTask>& t) {
    TaskViewArray<typename TaskTraits<ManTask>::TaskViewFwd> f(t);
    sort<typename TaskTraits<ManTask>::TaskViewFwd,STO_LCT,true>(f);

    Region r;
    OmegaTree<typename TaskTraits<ManTask>::TaskViewFwd> o(r,c,f);

    for (int i=0; i<f.size(); i++) {
      if (f[i].mandatory())
        o.insert(i);
      if (o.env() > static_cast<long long int>(c)*f[i].lct())
        GECODE_ME_CHECK(f[i].excluded(home));
    }
    return ES_OK;
  }

}}}

// STATISTICS: int-prop