Sync public subset from Flux (private)
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209
include/utils/Eigen/src/Core/ArrayWrapper.h
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209
include/utils/Eigen/src/Core/ArrayWrapper.h
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// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra.
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//
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// Copyright (C) 2009-2010 Gael Guennebaud <gael.guennebaud@inria.fr>
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//
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// This Source Code Form is subject to the terms of the Mozilla
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// Public License v. 2.0. If a copy of the MPL was not distributed
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// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#ifndef EIGEN_ARRAYWRAPPER_H
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#define EIGEN_ARRAYWRAPPER_H
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namespace Eigen {
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/** \class ArrayWrapper
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* \ingroup Core_Module
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*
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* \brief Expression of a mathematical vector or matrix as an array object
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*
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* This class is the return type of MatrixBase::array(), and most of the time
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* this is the only way it is use.
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*
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* \sa MatrixBase::array(), class MatrixWrapper
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*/
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namespace internal {
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template<typename ExpressionType>
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struct traits<ArrayWrapper<ExpressionType> >
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: public traits<typename remove_all<typename ExpressionType::Nested>::type >
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{
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typedef ArrayXpr XprKind;
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// Let's remove NestByRefBit
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enum {
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Flags0 = traits<typename remove_all<typename ExpressionType::Nested>::type >::Flags,
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LvalueBitFlag = is_lvalue<ExpressionType>::value ? LvalueBit : 0,
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Flags = (Flags0 & ~(NestByRefBit | LvalueBit)) | LvalueBitFlag
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};
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};
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}
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template<typename ExpressionType>
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class ArrayWrapper : public ArrayBase<ArrayWrapper<ExpressionType> >
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{
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public:
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typedef ArrayBase<ArrayWrapper> Base;
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EIGEN_DENSE_PUBLIC_INTERFACE(ArrayWrapper)
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EIGEN_INHERIT_ASSIGNMENT_OPERATORS(ArrayWrapper)
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typedef typename internal::remove_all<ExpressionType>::type NestedExpression;
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typedef typename internal::conditional<
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internal::is_lvalue<ExpressionType>::value,
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Scalar,
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const Scalar
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>::type ScalarWithConstIfNotLvalue;
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typedef typename internal::ref_selector<ExpressionType>::non_const_type NestedExpressionType;
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using Base::coeffRef;
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EIGEN_DEVICE_FUNC
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explicit EIGEN_STRONG_INLINE ArrayWrapper(ExpressionType& matrix) : m_expression(matrix) {}
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EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
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inline Index rows() const EIGEN_NOEXCEPT { return m_expression.rows(); }
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EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
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inline Index cols() const EIGEN_NOEXCEPT { return m_expression.cols(); }
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EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
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inline Index outerStride() const EIGEN_NOEXCEPT { return m_expression.outerStride(); }
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EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
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inline Index innerStride() const EIGEN_NOEXCEPT { return m_expression.innerStride(); }
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EIGEN_DEVICE_FUNC
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inline ScalarWithConstIfNotLvalue* data() { return m_expression.data(); }
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EIGEN_DEVICE_FUNC
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inline const Scalar* data() const { return m_expression.data(); }
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EIGEN_DEVICE_FUNC
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inline const Scalar& coeffRef(Index rowId, Index colId) const
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{
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return m_expression.coeffRef(rowId, colId);
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}
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EIGEN_DEVICE_FUNC
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inline const Scalar& coeffRef(Index index) const
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{
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return m_expression.coeffRef(index);
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}
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template<typename Dest>
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EIGEN_DEVICE_FUNC
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inline void evalTo(Dest& dst) const { dst = m_expression; }
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EIGEN_DEVICE_FUNC
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const typename internal::remove_all<NestedExpressionType>::type&
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nestedExpression() const
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{
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return m_expression;
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}
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/** Forwards the resizing request to the nested expression
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* \sa DenseBase::resize(Index) */
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EIGEN_DEVICE_FUNC
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void resize(Index newSize) { m_expression.resize(newSize); }
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/** Forwards the resizing request to the nested expression
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* \sa DenseBase::resize(Index,Index)*/
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EIGEN_DEVICE_FUNC
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void resize(Index rows, Index cols) { m_expression.resize(rows,cols); }
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protected:
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NestedExpressionType m_expression;
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};
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/** \class MatrixWrapper
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* \ingroup Core_Module
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*
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* \brief Expression of an array as a mathematical vector or matrix
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*
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* This class is the return type of ArrayBase::matrix(), and most of the time
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* this is the only way it is use.
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*
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* \sa MatrixBase::matrix(), class ArrayWrapper
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*/
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namespace internal {
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template<typename ExpressionType>
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struct traits<MatrixWrapper<ExpressionType> >
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: public traits<typename remove_all<typename ExpressionType::Nested>::type >
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{
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typedef MatrixXpr XprKind;
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// Let's remove NestByRefBit
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enum {
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Flags0 = traits<typename remove_all<typename ExpressionType::Nested>::type >::Flags,
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LvalueBitFlag = is_lvalue<ExpressionType>::value ? LvalueBit : 0,
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Flags = (Flags0 & ~(NestByRefBit | LvalueBit)) | LvalueBitFlag
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};
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};
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}
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template<typename ExpressionType>
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class MatrixWrapper : public MatrixBase<MatrixWrapper<ExpressionType> >
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{
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public:
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typedef MatrixBase<MatrixWrapper<ExpressionType> > Base;
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EIGEN_DENSE_PUBLIC_INTERFACE(MatrixWrapper)
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EIGEN_INHERIT_ASSIGNMENT_OPERATORS(MatrixWrapper)
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typedef typename internal::remove_all<ExpressionType>::type NestedExpression;
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typedef typename internal::conditional<
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internal::is_lvalue<ExpressionType>::value,
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Scalar,
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const Scalar
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>::type ScalarWithConstIfNotLvalue;
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typedef typename internal::ref_selector<ExpressionType>::non_const_type NestedExpressionType;
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using Base::coeffRef;
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EIGEN_DEVICE_FUNC
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explicit inline MatrixWrapper(ExpressionType& matrix) : m_expression(matrix) {}
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EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
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inline Index rows() const EIGEN_NOEXCEPT { return m_expression.rows(); }
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EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
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inline Index cols() const EIGEN_NOEXCEPT { return m_expression.cols(); }
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EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
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inline Index outerStride() const EIGEN_NOEXCEPT { return m_expression.outerStride(); }
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EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
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inline Index innerStride() const EIGEN_NOEXCEPT { return m_expression.innerStride(); }
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EIGEN_DEVICE_FUNC
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inline ScalarWithConstIfNotLvalue* data() { return m_expression.data(); }
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EIGEN_DEVICE_FUNC
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inline const Scalar* data() const { return m_expression.data(); }
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EIGEN_DEVICE_FUNC
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inline const Scalar& coeffRef(Index rowId, Index colId) const
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{
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return m_expression.derived().coeffRef(rowId, colId);
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}
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EIGEN_DEVICE_FUNC
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inline const Scalar& coeffRef(Index index) const
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{
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return m_expression.coeffRef(index);
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}
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EIGEN_DEVICE_FUNC
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const typename internal::remove_all<NestedExpressionType>::type&
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nestedExpression() const
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{
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return m_expression;
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}
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/** Forwards the resizing request to the nested expression
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* \sa DenseBase::resize(Index) */
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EIGEN_DEVICE_FUNC
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void resize(Index newSize) { m_expression.resize(newSize); }
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/** Forwards the resizing request to the nested expression
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* \sa DenseBase::resize(Index,Index)*/
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EIGEN_DEVICE_FUNC
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void resize(Index rows, Index cols) { m_expression.resize(rows,cols); }
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protected:
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NestedExpressionType m_expression;
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};
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} // end namespace Eigen
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#endif // EIGEN_ARRAYWRAPPER_H
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