/usr/include/trilinos/BelosOperatorT.hpp is in libtrilinos-muelu-dev 12.4.2-2.
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// MueLu: A package for multigrid based preconditioning
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#ifndef BELOS_OPERATORT_HPP
#define BELOS_OPERATORT_HPP
#include "BelosOperatorTraits.hpp"
namespace Belos {
// TODO: this file should certainly be moved to Belos.
// Base class for the Belos OP template type. Similar to Belos::Operator<> but this one deals with any kind of vector (not only Belos::MultiVec as the Belos::Operator interface)
template <class MV>
class OperatorT {
public:
//! @name Constructor/Destructor
//@{
//! Default constructor
OperatorT() {};
//! Destructor.
virtual ~OperatorT() {};
//@}
//! @name Operator application method
//@{
/*! \brief This routine takes the Belos::MultiVec \c x and applies the operator
to it resulting in the Belos::MultiVec \c y, which is returned.
\note It is expected that any problem with applying this operator to \c x will be
indicated by an std::exception being thrown.
*/
virtual void Apply ( const MV & x, MV & y, ETrans trans=NOTRANS ) const = 0;
};
/// \brief Specialization of OperatorTraits for OperatorT.
///
/// This is a partial template specialization of
/// Belos::OperatorTraits class using the Belos::OperatorT
/// abstract interface. Any class that inherits
/// from Belos::OperatorT will be accepted by the Belos templated
/// solvers, due to this specialization of Belos::OperatorTraits.
template <class ScalarType, class MV>
class OperatorTraits<ScalarType, MV, OperatorT<MV> >
{
public:
//! Specialization of Apply() for OperatorT.
static void Apply (const OperatorT<MV>& Op,
const MV& x,
MV& y, ETrans trans=NOTRANS) {
Op.Apply (x, y, trans);
}
};
} // namespace Belos
#endif // BELOS_OPERATORT_HPP
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