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// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr>
// Copyright (C) 2008 Benoit Jacob <jacob.benoit.1@gmail.com>
//
// 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_CWISE_H
#define EIGEN_CWISE_H
namespace Eigen {
/** \internal
* convenient macro to defined the return type of a cwise binary operation */
#define EIGEN_CWISE_BINOP_RETURN_TYPE(OP) \
CwiseBinaryOp<OP<typename internal::traits<ExpressionType>::Scalar>, ExpressionType, OtherDerived>
/** \internal
* convenient macro to defined the return type of a cwise unary operation */
#define EIGEN_CWISE_UNOP_RETURN_TYPE(OP) \
CwiseUnaryOp<OP<typename internal::traits<ExpressionType>::Scalar>, ExpressionType>
/** \internal
* convenient macro to defined the return type of a cwise comparison to a scalar */
#define EIGEN_CWISE_COMP_TO_SCALAR_RETURN_TYPE(OP) \
CwiseBinaryOp<OP<typename internal::traits<ExpressionType>::Scalar>, ExpressionType, \
typename ExpressionType::ConstantReturnType >
/** \class Cwise
*
* \brief Pseudo expression providing additional coefficient-wise operations
*
* \param ExpressionType the type of the object on which to do coefficient-wise operations
*
* This class represents an expression with additional coefficient-wise features.
* It is the return type of MatrixBase::cwise()
* and most of the time this is the only way it is used.
*
* Example: \include MatrixBase_cwise_const.cpp
* Output: \verbinclude MatrixBase_cwise_const.out
*
* This class can be extended with the help of the plugin mechanism described on the page
* \ref TopicCustomizingEigen by defining the preprocessor symbol \c EIGEN_CWISE_PLUGIN.
*
* \sa MatrixBase::cwise() const, MatrixBase::cwise()
*/
template<typename ExpressionType> class Cwise
{
public:
typedef typename internal::traits<ExpressionType>::Scalar Scalar;
typedef typename internal::conditional<internal::must_nest_by_value<ExpressionType>::ret,
ExpressionType, const ExpressionType&>::type ExpressionTypeNested;
typedef CwiseUnaryOp<internal::scalar_add_op<Scalar>, ExpressionType> ScalarAddReturnType;
inline Cwise(const ExpressionType& matrix) : m_matrix(matrix) {}
/** \internal */
inline const ExpressionType& _expression() const { return m_matrix; }
template<typename OtherDerived>
const EIGEN_CWISE_PRODUCT_RETURN_TYPE(ExpressionType,OtherDerived)
operator*(const MatrixBase<OtherDerived> &other) const;
template<typename OtherDerived>
const EIGEN_CWISE_BINOP_RETURN_TYPE(internal::scalar_quotient_op)
operator/(const MatrixBase<OtherDerived> &other) const;
/** \deprecated ArrayBase::min() */
template<typename OtherDerived>
const EIGEN_CWISE_BINOP_RETURN_TYPE(internal::scalar_min_op)
(min)(const MatrixBase<OtherDerived> &other) const
{ return EIGEN_CWISE_BINOP_RETURN_TYPE(internal::scalar_min_op)(_expression(), other.derived()); }
/** \deprecated ArrayBase::max() */
template<typename OtherDerived>
const EIGEN_CWISE_BINOP_RETURN_TYPE(internal::scalar_max_op)
(max)(const MatrixBase<OtherDerived> &other) const
{ return EIGEN_CWISE_BINOP_RETURN_TYPE(internal::scalar_max_op)(_expression(), other.derived()); }
const EIGEN_CWISE_UNOP_RETURN_TYPE(internal::scalar_abs_op) abs() const;
const EIGEN_CWISE_UNOP_RETURN_TYPE(internal::scalar_abs2_op) abs2() const;
const EIGEN_CWISE_UNOP_RETURN_TYPE(internal::scalar_square_op) square() const;
const EIGEN_CWISE_UNOP_RETURN_TYPE(internal::scalar_cube_op) cube() const;
const EIGEN_CWISE_UNOP_RETURN_TYPE(internal::scalar_inverse_op) inverse() const;
const EIGEN_CWISE_UNOP_RETURN_TYPE(internal::scalar_sqrt_op) sqrt() const;
const EIGEN_CWISE_UNOP_RETURN_TYPE(internal::scalar_exp_op) exp() const;
const EIGEN_CWISE_UNOP_RETURN_TYPE(internal::scalar_log_op) log() const;
const EIGEN_CWISE_UNOP_RETURN_TYPE(internal::scalar_cos_op) cos() const;
const EIGEN_CWISE_UNOP_RETURN_TYPE(internal::scalar_sin_op) sin() const;
const EIGEN_CWISE_UNOP_RETURN_TYPE(internal::scalar_pow_op) pow(const Scalar& exponent) const;
const ScalarAddReturnType
operator+(const Scalar& scalar) const;
/** \relates Cwise */
friend const ScalarAddReturnType
operator+(const Scalar& scalar, const Cwise& mat)
{ return mat + scalar; }
ExpressionType& operator+=(const Scalar& scalar);
const ScalarAddReturnType
operator-(const Scalar& scalar) const;
ExpressionType& operator-=(const Scalar& scalar);
template<typename OtherDerived>
inline ExpressionType& operator*=(const MatrixBase<OtherDerived> &other);
template<typename OtherDerived>
inline ExpressionType& operator/=(const MatrixBase<OtherDerived> &other);
template<typename OtherDerived> const EIGEN_CWISE_BINOP_RETURN_TYPE(std::less)
operator<(const MatrixBase<OtherDerived>& other) const;
template<typename OtherDerived> const EIGEN_CWISE_BINOP_RETURN_TYPE(std::less_equal)
operator<=(const MatrixBase<OtherDerived>& other) const;
template<typename OtherDerived> const EIGEN_CWISE_BINOP_RETURN_TYPE(std::greater)
operator>(const MatrixBase<OtherDerived>& other) const;
template<typename OtherDerived> const EIGEN_CWISE_BINOP_RETURN_TYPE(std::greater_equal)
operator>=(const MatrixBase<OtherDerived>& other) const;
template<typename OtherDerived> const EIGEN_CWISE_BINOP_RETURN_TYPE(std::equal_to)
operator==(const MatrixBase<OtherDerived>& other) const;
template<typename OtherDerived> const EIGEN_CWISE_BINOP_RETURN_TYPE(std::not_equal_to)
operator!=(const MatrixBase<OtherDerived>& other) const;
// comparisons to a scalar value
const EIGEN_CWISE_COMP_TO_SCALAR_RETURN_TYPE(std::less)
operator<(Scalar s) const;
const EIGEN_CWISE_COMP_TO_SCALAR_RETURN_TYPE(std::less_equal)
operator<=(Scalar s) const;
const EIGEN_CWISE_COMP_TO_SCALAR_RETURN_TYPE(std::greater)
operator>(Scalar s) const;
const EIGEN_CWISE_COMP_TO_SCALAR_RETURN_TYPE(std::greater_equal)
operator>=(Scalar s) const;
const EIGEN_CWISE_COMP_TO_SCALAR_RETURN_TYPE(std::equal_to)
operator==(Scalar s) const;
const EIGEN_CWISE_COMP_TO_SCALAR_RETURN_TYPE(std::not_equal_to)
operator!=(Scalar s) const;
// allow to extend Cwise outside Eigen
#ifdef EIGEN_CWISE_PLUGIN
#include EIGEN_CWISE_PLUGIN
#endif
protected:
ExpressionTypeNested m_matrix;
};
/** \returns a Cwise wrapper of *this providing additional coefficient-wise operations
*
* Example: \include MatrixBase_cwise_const.cpp
* Output: \verbinclude MatrixBase_cwise_const.out
*
* \sa class Cwise, cwise()
*/
template<typename Derived>
inline const Cwise<Derived> MatrixBase<Derived>::cwise() const
{
return derived();
}
/** \returns a Cwise wrapper of *this providing additional coefficient-wise operations
*
* Example: \include MatrixBase_cwise.cpp
* Output: \verbinclude MatrixBase_cwise.out
*
* \sa class Cwise, cwise() const
*/
template<typename Derived>
inline Cwise<Derived> MatrixBase<Derived>::cwise()
{
return derived();
}
} // end namespace Eigen
#endif // EIGEN_CWISE_H
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