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// ***********************************************************************
//
// Moocho: Multi-functional Object-Oriented arCHitecture for Optimization
// Copyright (2003) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
//
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA
// Questions? Contact Roscoe A. Bartlett (rabartl@sandia.gov)
//
// ***********************************************************************
// @HEADER
#ifndef ETA_VECTOR_H
#define ETA_VECTOR_H
#include "AbstractLinAlgPack_SpVectorClass.hpp"
namespace AbstractLinAlgPack {
/** \brief Create an eta vector (scaled by alpha = default 1).
*
* The created vector is of size n and has the single nonzero
* element of eta(i) = alpha.
*
* The default constructor and assignment functions are not
* allowed.
*/
class EtaVector {
public:
typedef SpVectorSlice::element_type ele_t;
/** \brief . */
EtaVector( ele_t::index_type i, size_type n, ele_t::value_type alpha = 1.0 )
: ele_(i,alpha), sv_(&ele_,1,0,n,true)
{}
/// Implicit conversion to a SpVectorSlice object.
operator const SpVectorSlice() const
{
return sv_;
}
/// Explicit conversion to a SpVectorSlice object.
const SpVectorSlice& operator()() const
{
return sv_;
}
private:
ele_t ele_;
SpVectorSlice sv_;
// not defined and not to be called
EtaVector();
EtaVector& operator=(const EtaVector&);
}; // end class EtaVector
} // namespace AbstractLinAlgPack
#endif // ETA_VECTOR_H
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