Eigen/src/plugins/MatrixCwiseUnaryOps.inc

// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2008-2009 Gael Guennebaud <gael.guennebaud@inria.fr>
// Copyright (C) 2006-2008 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/.

// This file is included into the body of the base classes supporting matrix specific coefficient-wise functions.
// This include MatrixBase and SparseMatrixBase.

typedef CwiseUnaryOp<internal::scalar_abs_op<Scalar>, const Derived> CwiseAbsReturnType;
typedef CwiseUnaryOp<internal::scalar_abs2_op<Scalar>, const Derived> CwiseAbs2ReturnType;
typedef CwiseUnaryOp<internal::scalar_arg_op<Scalar>, const Derived> CwiseArgReturnType;
typedef CwiseUnaryOp<internal::scalar_carg_op<Scalar>, const Derived> CwiseCArgReturnType;
typedef CwiseUnaryOp<internal::scalar_sqrt_op<Scalar>, const Derived> CwiseSqrtReturnType;
typedef CwiseUnaryOp<internal::scalar_cbrt_op<Scalar>, const Derived> CwiseCbrtReturnType;
typedef CwiseUnaryOp<internal::scalar_square_op<Scalar>, const Derived> CwiseSquareReturnType;
typedef CwiseUnaryOp<internal::scalar_sign_op<Scalar>, const Derived> CwiseSignReturnType;
typedef CwiseUnaryOp<internal::scalar_inverse_op<Scalar>, const Derived> CwiseInverseReturnType;

/// \returns an expression of the coefficient-wise absolute value of \c *this
///
/// Example: \include MatrixBase_cwiseAbs.cpp
/// Output: \verbinclude MatrixBase_cwiseAbs.out
///
EIGEN_DOC_UNARY_ADDONS(cwiseAbs, absolute value)
///
/// \sa cwiseAbs2()
///
EIGEN_DEVICE_FUNC constexpr EIGEN_STRONG_INLINE const CwiseAbsReturnType cwiseAbs() const {
  return CwiseAbsReturnType(derived());
}

/// \returns an expression of the coefficient-wise squared absolute value of \c *this
///
/// Example: \include MatrixBase_cwiseAbs2.cpp
/// Output: \verbinclude MatrixBase_cwiseAbs2.out
///
EIGEN_DOC_UNARY_ADDONS(cwiseAbs2, squared absolute value)
///
/// \sa cwiseAbs()
///
EIGEN_DEVICE_FUNC constexpr EIGEN_STRONG_INLINE const CwiseAbs2ReturnType cwiseAbs2() const {
  return CwiseAbs2ReturnType(derived());
}

/// \returns an expression of the coefficient-wise square root of *this.
///
/// Example: \include MatrixBase_cwiseSqrt.cpp
/// Output: \verbinclude MatrixBase_cwiseSqrt.out
///
EIGEN_DOC_UNARY_ADDONS(cwiseSqrt, square - root)
///
/// \sa cwisePow(), cwiseSquare(), cwiseCbrt()
///
EIGEN_DEVICE_FUNC constexpr inline const CwiseSqrtReturnType cwiseSqrt() const {
  return CwiseSqrtReturnType(derived());
}

/// \returns an expression of the coefficient-wise cube root of *this.
///
EIGEN_DOC_UNARY_ADDONS(cwiseCbrt, cube - root)
///
/// \sa cwiseSqrt(), cwiseSquare(), cwisePow()
///
EIGEN_DEVICE_FUNC constexpr inline const CwiseCbrtReturnType cwiseCbrt() const {
  return CwiseCbrtReturnType(derived());
}

/// \returns an expression of the coefficient-wise square of *this.
///
EIGEN_DOC_UNARY_ADDONS(cwiseSquare, square)
///
/// \sa cwisePow(), cwiseSqrt(), cwiseCbrt()
///
EIGEN_DEVICE_FUNC constexpr inline const CwiseSquareReturnType cwiseSquare() const {
  return CwiseSquareReturnType(derived());
}

/// \returns an expression of the coefficient-wise signum of *this.
///
/// Example: \include MatrixBase_cwiseSign.cpp
/// Output: \verbinclude MatrixBase_cwiseSign.out
///
EIGEN_DOC_UNARY_ADDONS(cwiseSign, sign function)
///
EIGEN_DEVICE_FUNC constexpr inline const CwiseSignReturnType cwiseSign() const {
  return CwiseSignReturnType(derived());
}

/// \returns an expression of the coefficient-wise inverse of *this.
///
/// Example: \include MatrixBase_cwiseInverse.cpp
/// Output: \verbinclude MatrixBase_cwiseInverse.out
///
EIGEN_DOC_UNARY_ADDONS(cwiseInverse, inverse)
///
/// \sa cwiseProduct()
///
EIGEN_DEVICE_FUNC constexpr inline const CwiseInverseReturnType cwiseInverse() const {
  return CwiseInverseReturnType(derived());
}

/// \returns an expression of the coefficient-wise phase angle of \c *this
///
/// Example: \include MatrixBase_cwiseArg.cpp
/// Output: \verbinclude MatrixBase_cwiseArg.out
///
EIGEN_DOC_UNARY_ADDONS(cwiseArg, arg)

EIGEN_DEVICE_FUNC constexpr inline const CwiseArgReturnType cwiseArg() const { return CwiseArgReturnType(derived()); }

EIGEN_DEVICE_FUNC constexpr EIGEN_STRONG_INLINE const CwiseCArgReturnType cwiseCArg() const {
  return CwiseCArgReturnType(derived());
}

template <typename ScalarExponent>
using CwisePowReturnType =
    std::enable_if_t<internal::is_arithmetic<typename NumTraits<ScalarExponent>::Real>::value,
                     CwiseUnaryOp<internal::scalar_unary_pow_op<Scalar, ScalarExponent>, const Derived>>;

template <typename ScalarExponent>
EIGEN_DEVICE_FUNC constexpr inline const CwisePowReturnType<ScalarExponent> cwisePow(
    const ScalarExponent& exponent) const {
  return CwisePowReturnType<ScalarExponent>(derived(), internal::scalar_unary_pow_op<Scalar, ScalarExponent>(exponent));
}