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Eigen
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00001 // This file is part of Eigen, a lightweight C++ template library 00002 // for linear algebra. 00003 // 00004 // Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr> 00005 // Copyright (C) 2006-2008 Benoit Jacob <jacob.benoit.1@gmail.com> 00006 // 00007 // This Source Code Form is subject to the terms of the Mozilla 00008 // Public License v. 2.0. If a copy of the MPL was not distributed 00009 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/. 00010 00011 #ifndef EIGEN_NESTBYVALUE_H 00012 #define EIGEN_NESTBYVALUE_H 00013 00014 namespace Eigen { 00015 00029 namespace internal { 00030 template<typename ExpressionType> 00031 struct traits<NestByValue<ExpressionType> > : public traits<ExpressionType> 00032 {}; 00033 } 00034 00035 template<typename ExpressionType> class NestByValue 00036 : public internal::dense_xpr_base< NestByValue<ExpressionType> >::type 00037 { 00038 public: 00039 00040 typedef typename internal::dense_xpr_base<NestByValue>::type Base; 00041 EIGEN_DENSE_PUBLIC_INTERFACE(NestByValue) 00042 00043 inline NestByValue(const ExpressionType& matrix) : m_expression(matrix) {} 00044 00045 inline Index rows() const { return m_expression.rows(); } 00046 inline Index cols() const { return m_expression.cols(); } 00047 inline Index outerStride() const { return m_expression.outerStride(); } 00048 inline Index innerStride() const { return m_expression.innerStride(); } 00049 00050 inline const CoeffReturnType coeff(Index row, Index col) const 00051 { 00052 return m_expression.coeff(row, col); 00053 } 00054 00055 inline Scalar& coeffRef(Index row, Index col) 00056 { 00057 return m_expression.const_cast_derived().coeffRef(row, col); 00058 } 00059 00060 inline const CoeffReturnType coeff(Index index) const 00061 { 00062 return m_expression.coeff(index); 00063 } 00064 00065 inline Scalar& coeffRef(Index index) 00066 { 00067 return m_expression.const_cast_derived().coeffRef(index); 00068 } 00069 00070 template<int LoadMode> 00071 inline const PacketScalar packet(Index row, Index col) const 00072 { 00073 return m_expression.template packet<LoadMode>(row, col); 00074 } 00075 00076 template<int LoadMode> 00077 inline void writePacket(Index row, Index col, const PacketScalar& x) 00078 { 00079 m_expression.const_cast_derived().template writePacket<LoadMode>(row, col, x); 00080 } 00081 00082 template<int LoadMode> 00083 inline const PacketScalar packet(Index index) const 00084 { 00085 return m_expression.template packet<LoadMode>(index); 00086 } 00087 00088 template<int LoadMode> 00089 inline void writePacket(Index index, const PacketScalar& x) 00090 { 00091 m_expression.const_cast_derived().template writePacket<LoadMode>(index, x); 00092 } 00093 00094 operator const ExpressionType&() const { return m_expression; } 00095 00096 protected: 00097 const ExpressionType m_expression; 00098 }; 00099 00102 template<typename Derived> 00103 inline const NestByValue<Derived> 00104 DenseBase<Derived>::nestByValue() const 00105 { 00106 return NestByValue<Derived>(derived()); 00107 } 00108 00109 } // end namespace Eigen 00110 00111 #endif // EIGEN_NESTBYVALUE_H