/usr/include/trilinos/Amesos2_SolverTraits.hpp is in libtrilinos-amesos2-dev 12.10.1-3.
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//
// ***********************************************************************
//
// Amesos2: Templated Direct Sparse Solver Package
// Copyright 2011 Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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//
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/**
* \file Amesos2_SolverTraits.hpp
* \author Eric Bavier <etbavie@muenster.srn.sandia.gov>
* \date Mon Jul 18 16:10:34 2011
*
* \brief Provides access to interesting solver traits
*
*
*/
#ifndef AMESOS2_SOLVERTRAITS_HPP
#define AMESOS2_SOLVERTRAITS_HPP
#include "Amesos2_Meta.hpp"
namespace Amesos2 {
/** \internal
*
* \brief Provides traits about solvers.
*
* \internal Each concrete solver interface should specialize this
* struct for that particular solver.
*/
template <template <class,class> class ConcreteSolver>
struct solver_traits {
typedef Meta::nil_t supported_scalars;
};
////////////////////////////
// Related meta-functions //
////////////////////////////
/** \internal
*
* \brief Check whether a solver supports a scalar type
*
* A meta-function for checking a solver's support for a scalar.
* The special-case is a Meta::nil_t list, which we are going to
* interpret as the solver supporting any and all types.
* If a solver's supported_scalars type-list is nil, this
* meta-function returns true always. Otherwise, it checks whether
* the given type is in the solver's supported_scalars list.
*/
/* SR: We will not use external initialization for the static const types.
* Combined with template meta programming this fails in Intel compilers
* 11-13. Moving all the initializations inside the declarations.
*/
template <template <class,class> class ConcreteSolver,
typename Scalar>
struct solver_supports_scalar {
static const bool value =
Meta::if_then_else<Meta::is_same<typename solver_traits<ConcreteSolver>::supported_scalars, Meta::nil_t>::value,
Meta::true_type,
Meta::type_list_contains<
typename solver_traits<ConcreteSolver>::supported_scalars,
Scalar> >::type::value;
};
} // end namespace Amesos2
#endif // AMESOS2_SOLVERTRAITS_HPP
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