/usr/include/trilinos/RTOpPack_TOpLinearCombination_decl.hpp is in libtrilinos-rtop-dev 12.12.1-5.
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// ***********************************************************************
//
// RTOp: Interfaces and Support Software for Vector Reduction Transformation
// Operations
// Copyright (2006) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
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// @HEADER
#ifndef RTOPPACK_TOP_LINEAR_COMBINATION_DECL_HPP
#define RTOPPACK_TOP_LINEAR_COMBINATION_DECL_HPP
#include "RTOpPack_RTOpTHelpers.hpp"
#include "Teuchos_Workspace.hpp"
namespace RTOpPack {
/** \brief Linear combination transformation operator: <tt>z0[i] = beta*z0[i]
* + sum( alpha[k]*v[k][i], k=0...num_vecs-1 ), i=0...n-1</tt>.
*
* This transformation operator only accepts <tt>num_targ_vec==1</tt>
* but accepts any <tt>num_vecs > 0</tt>.
*
* Warning! this class can only be used in SPMD mode and not
* client/server or master/slave. You know what needs to happen for
* this to work!
*/
template<class Scalar>
class TOpLinearCombination : public RTOpT<Scalar> {
public:
/** \brief . */
TOpLinearCombination(
const ArrayView<const Scalar> &alpha_in = Teuchos::null,
const Scalar &beta = Teuchos::ScalarTraits<Scalar>::zero()
);
/** \brief . */
void alpha( const ArrayView<const Scalar> &alpha_in );
/** \brief . */
const ArrayView<const Scalar> alpha() const;
/** \brief . */
void beta( const Scalar& beta_in );
/** \brief . */
Scalar beta() const;
/** \brief . */
int num_vecs() const;
/** @name Overridden from RTOpT */
//@{
/** \brief . */
void apply_op_impl(
const ArrayView<const ConstSubVectorView<Scalar> > &sub_vecs,
const ArrayView<const SubVectorView<Scalar> > &targ_sub_vecs,
const Ptr<ReductTarget> &reduct_obj_inout
) const;
//@}
private:
Scalar beta_;
Array<Scalar> alpha_;
};
} // namespace RTOpPack
#endif // RTOPPACK_TOP_LINEAR_COMBINATION_DECL_HPP
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