Select.h

// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2008-2010 Gael Guennebaud <gael.guennebaud@inria.fr>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
#ifndef EIGEN_SELECT_H
#define EIGEN_SELECT_H
 
// IWYU pragma: private
#include "./InternalHeaderCheck.h"
 
namespace Eigen {

template <typename ConditionMatrixType, typename ThenMatrixType, typename ElseMatrixType>
using Select = CwiseTernaryOp<internal::scalar_boolean_select_op<typename DenseBase<ThenMatrixType>::Scalar,
                                                                 typename DenseBase<ElseMatrixType>::Scalar,
                                                                 typename DenseBase<ConditionMatrixType>::Scalar>,
                              ThenMatrixType, ElseMatrixType, ConditionMatrixType>;

template <typename Derived>
template <typename ThenDerived, typename ElseDerived>
inline EIGEN_DEVICE_FUNC CwiseTernaryOp<
    internal::scalar_boolean_select_op<typename DenseBase<ThenDerived>::Scalar, typename DenseBase<ElseDerived>::Scalar,
                                       typename DenseBase<Derived>::Scalar>,
    ThenDerived, ElseDerived, Derived>
DenseBase<Derived>::select(const DenseBase<ThenDerived>& thenMatrix, const DenseBase<ElseDerived>& elseMatrix) const {
  return Select<Derived, ThenDerived, ElseDerived>(thenMatrix.derived(), elseMatrix.derived(), derived());
}

template <typename Derived>
template <typename ThenDerived>
inline EIGEN_DEVICE_FUNC CwiseTernaryOp<
    internal::scalar_boolean_select_op<typename DenseBase<ThenDerived>::Scalar, typename DenseBase<ThenDerived>::Scalar,
                                       typename DenseBase<Derived>::Scalar>,
    ThenDerived, typename DenseBase<ThenDerived>::ConstantReturnType, Derived>
DenseBase<Derived>::select(const DenseBase<ThenDerived>& thenMatrix,
                           const typename DenseBase<ThenDerived>::Scalar& elseScalar) const {
  using ElseConstantType = typename DenseBase<ThenDerived>::ConstantReturnType;
  return Select<Derived, ThenDerived, ElseConstantType>(thenMatrix.derived(),
                                                        ElseConstantType(rows(), cols(), elseScalar), derived());
}

template <typename Derived>
template <typename ElseDerived>
inline EIGEN_DEVICE_FUNC CwiseTernaryOp<
    internal::scalar_boolean_select_op<typename DenseBase<ElseDerived>::Scalar, typename DenseBase<ElseDerived>::Scalar,
                                       typename DenseBase<Derived>::Scalar>,
    typename DenseBase<ElseDerived>::ConstantReturnType, ElseDerived, Derived>
DenseBase<Derived>::select(const typename DenseBase<ElseDerived>::Scalar& thenScalar,
                           const DenseBase<ElseDerived>& elseMatrix) const {
  using ThenConstantType = typename DenseBase<ElseDerived>::ConstantReturnType;
  return Select<Derived, ThenConstantType, ElseDerived>(ThenConstantType(rows(), cols(), thenScalar),
                                                        elseMatrix.derived(), derived());
}
 
}  // end namespace Eigen
 
#endif  // EIGEN_SELECT_H