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