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197
3party/eigen/Eigen/src/Core/CwiseTernaryOp.h
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197
3party/eigen/Eigen/src/Core/CwiseTernaryOp.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) 2008-2014 Gael Guennebaud <gael.guennebaud@inria.fr>
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// Copyright (C) 2006-2008 Benoit Jacob <jacob.benoit.1@gmail.com>
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// Copyright (C) 2016 Eugene Brevdo <ebrevdo@gmail.com>
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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_CWISE_TERNARY_OP_H
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#define EIGEN_CWISE_TERNARY_OP_H
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namespace Eigen {
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namespace internal {
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template <typename TernaryOp, typename Arg1, typename Arg2, typename Arg3>
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struct traits<CwiseTernaryOp<TernaryOp, Arg1, Arg2, Arg3> > {
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// we must not inherit from traits<Arg1> since it has
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// the potential to cause problems with MSVC
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typedef typename remove_all<Arg1>::type Ancestor;
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typedef typename traits<Ancestor>::XprKind XprKind;
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enum {
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RowsAtCompileTime = traits<Ancestor>::RowsAtCompileTime,
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ColsAtCompileTime = traits<Ancestor>::ColsAtCompileTime,
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MaxRowsAtCompileTime = traits<Ancestor>::MaxRowsAtCompileTime,
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MaxColsAtCompileTime = traits<Ancestor>::MaxColsAtCompileTime
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};
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// even though we require Arg1, Arg2, and Arg3 to have the same scalar type
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// (see CwiseTernaryOp constructor),
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// we still want to handle the case when the result type is different.
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typedef typename result_of<TernaryOp(
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const typename Arg1::Scalar&, const typename Arg2::Scalar&,
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const typename Arg3::Scalar&)>::type Scalar;
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typedef typename internal::traits<Arg1>::StorageKind StorageKind;
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typedef typename internal::traits<Arg1>::StorageIndex StorageIndex;
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typedef typename Arg1::Nested Arg1Nested;
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typedef typename Arg2::Nested Arg2Nested;
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typedef typename Arg3::Nested Arg3Nested;
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typedef typename remove_reference<Arg1Nested>::type _Arg1Nested;
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typedef typename remove_reference<Arg2Nested>::type _Arg2Nested;
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typedef typename remove_reference<Arg3Nested>::type _Arg3Nested;
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enum { Flags = _Arg1Nested::Flags & RowMajorBit };
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};
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} // end namespace internal
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template <typename TernaryOp, typename Arg1, typename Arg2, typename Arg3,
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typename StorageKind>
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class CwiseTernaryOpImpl;
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/** \class CwiseTernaryOp
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* \ingroup Core_Module
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*
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* \brief Generic expression where a coefficient-wise ternary operator is
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* applied to two expressions
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*
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* \tparam TernaryOp template functor implementing the operator
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* \tparam Arg1Type the type of the first argument
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* \tparam Arg2Type the type of the second argument
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* \tparam Arg3Type the type of the third argument
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*
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* This class represents an expression where a coefficient-wise ternary
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* operator is applied to three expressions.
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* It is the return type of ternary operators, by which we mean only those
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* ternary operators where
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* all three arguments are Eigen expressions.
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* For example, the return type of betainc(matrix1, matrix2, matrix3) is a
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* CwiseTernaryOp.
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*
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* Most of the time, this is the only way that it is used, so you typically
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* don't have to name
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* CwiseTernaryOp types explicitly.
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*
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* \sa MatrixBase::ternaryExpr(const MatrixBase<Argument2> &, const
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* MatrixBase<Argument3> &, const CustomTernaryOp &) const, class CwiseBinaryOp,
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* class CwiseUnaryOp, class CwiseNullaryOp
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*/
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template <typename TernaryOp, typename Arg1Type, typename Arg2Type,
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typename Arg3Type>
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class CwiseTernaryOp : public CwiseTernaryOpImpl<
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TernaryOp, Arg1Type, Arg2Type, Arg3Type,
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typename internal::traits<Arg1Type>::StorageKind>,
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internal::no_assignment_operator
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{
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public:
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typedef typename internal::remove_all<Arg1Type>::type Arg1;
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typedef typename internal::remove_all<Arg2Type>::type Arg2;
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typedef typename internal::remove_all<Arg3Type>::type Arg3;
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typedef typename CwiseTernaryOpImpl<
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TernaryOp, Arg1Type, Arg2Type, Arg3Type,
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typename internal::traits<Arg1Type>::StorageKind>::Base Base;
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EIGEN_GENERIC_PUBLIC_INTERFACE(CwiseTernaryOp)
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typedef typename internal::ref_selector<Arg1Type>::type Arg1Nested;
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typedef typename internal::ref_selector<Arg2Type>::type Arg2Nested;
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typedef typename internal::ref_selector<Arg3Type>::type Arg3Nested;
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typedef typename internal::remove_reference<Arg1Nested>::type _Arg1Nested;
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typedef typename internal::remove_reference<Arg2Nested>::type _Arg2Nested;
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typedef typename internal::remove_reference<Arg3Nested>::type _Arg3Nested;
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EIGEN_DEVICE_FUNC
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EIGEN_STRONG_INLINE CwiseTernaryOp(const Arg1& a1, const Arg2& a2,
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const Arg3& a3,
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const TernaryOp& func = TernaryOp())
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: m_arg1(a1), m_arg2(a2), m_arg3(a3), m_functor(func) {
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// require the sizes to match
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EIGEN_STATIC_ASSERT_SAME_MATRIX_SIZE(Arg1, Arg2)
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EIGEN_STATIC_ASSERT_SAME_MATRIX_SIZE(Arg1, Arg3)
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// The index types should match
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EIGEN_STATIC_ASSERT((internal::is_same<
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typename internal::traits<Arg1Type>::StorageKind,
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typename internal::traits<Arg2Type>::StorageKind>::value),
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STORAGE_KIND_MUST_MATCH)
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EIGEN_STATIC_ASSERT((internal::is_same<
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typename internal::traits<Arg1Type>::StorageKind,
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typename internal::traits<Arg3Type>::StorageKind>::value),
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STORAGE_KIND_MUST_MATCH)
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eigen_assert(a1.rows() == a2.rows() && a1.cols() == a2.cols() &&
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a1.rows() == a3.rows() && a1.cols() == a3.cols());
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}
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EIGEN_DEVICE_FUNC
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EIGEN_STRONG_INLINE Index rows() const {
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// return the fixed size type if available to enable compile time
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// optimizations
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if (internal::traits<typename internal::remove_all<Arg1Nested>::type>::
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RowsAtCompileTime == Dynamic &&
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internal::traits<typename internal::remove_all<Arg2Nested>::type>::
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RowsAtCompileTime == Dynamic)
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return m_arg3.rows();
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else if (internal::traits<typename internal::remove_all<Arg1Nested>::type>::
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RowsAtCompileTime == Dynamic &&
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internal::traits<typename internal::remove_all<Arg3Nested>::type>::
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RowsAtCompileTime == Dynamic)
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return m_arg2.rows();
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else
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return m_arg1.rows();
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}
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EIGEN_DEVICE_FUNC
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EIGEN_STRONG_INLINE Index cols() const {
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// return the fixed size type if available to enable compile time
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// optimizations
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if (internal::traits<typename internal::remove_all<Arg1Nested>::type>::
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ColsAtCompileTime == Dynamic &&
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internal::traits<typename internal::remove_all<Arg2Nested>::type>::
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ColsAtCompileTime == Dynamic)
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return m_arg3.cols();
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else if (internal::traits<typename internal::remove_all<Arg1Nested>::type>::
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ColsAtCompileTime == Dynamic &&
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internal::traits<typename internal::remove_all<Arg3Nested>::type>::
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ColsAtCompileTime == Dynamic)
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return m_arg2.cols();
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else
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return m_arg1.cols();
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}
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/** \returns the first argument nested expression */
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EIGEN_DEVICE_FUNC
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const _Arg1Nested& arg1() const { return m_arg1; }
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/** \returns the first argument nested expression */
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EIGEN_DEVICE_FUNC
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const _Arg2Nested& arg2() const { return m_arg2; }
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/** \returns the third argument nested expression */
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EIGEN_DEVICE_FUNC
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const _Arg3Nested& arg3() const { return m_arg3; }
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/** \returns the functor representing the ternary operation */
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EIGEN_DEVICE_FUNC
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const TernaryOp& functor() const { return m_functor; }
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protected:
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Arg1Nested m_arg1;
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Arg2Nested m_arg2;
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Arg3Nested m_arg3;
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const TernaryOp m_functor;
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};
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// Generic API dispatcher
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template <typename TernaryOp, typename Arg1, typename Arg2, typename Arg3,
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typename StorageKind>
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class CwiseTernaryOpImpl
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: public internal::generic_xpr_base<
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CwiseTernaryOp<TernaryOp, Arg1, Arg2, Arg3> >::type {
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public:
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typedef typename internal::generic_xpr_base<
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CwiseTernaryOp<TernaryOp, Arg1, Arg2, Arg3> >::type Base;
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};
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} // end namespace Eigen
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#endif // EIGEN_CWISE_TERNARY_OP_H
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