You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
85 lines
2.5 KiB
85 lines
2.5 KiB
// This file is part of Eigen, a lightweight C++ template library
|
|
// for linear algebra.
|
|
//
|
|
// Copyright (C) 2008 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/.
|
|
|
|
#ifndef EIGEN_NESTBYVALUE_H
|
|
#define EIGEN_NESTBYVALUE_H
|
|
|
|
namespace Eigen {
|
|
|
|
namespace internal {
|
|
template<typename ExpressionType>
|
|
struct traits<NestByValue<ExpressionType> > : public traits<ExpressionType>
|
|
{
|
|
enum {
|
|
Flags = traits<ExpressionType>::Flags & ~NestByRefBit
|
|
};
|
|
};
|
|
}
|
|
|
|
/** \class NestByValue
|
|
* \ingroup Core_Module
|
|
*
|
|
* \brief Expression which must be nested by value
|
|
*
|
|
* \tparam ExpressionType the type of the object of which we are requiring nesting-by-value
|
|
*
|
|
* This class is the return type of MatrixBase::nestByValue()
|
|
* and most of the time this is the only way it is used.
|
|
*
|
|
* \sa MatrixBase::nestByValue()
|
|
*/
|
|
template<typename ExpressionType> class NestByValue
|
|
: public internal::dense_xpr_base< NestByValue<ExpressionType> >::type
|
|
{
|
|
public:
|
|
|
|
typedef typename internal::dense_xpr_base<NestByValue>::type Base;
|
|
EIGEN_DENSE_PUBLIC_INTERFACE(NestByValue)
|
|
|
|
EIGEN_DEVICE_FUNC explicit inline NestByValue(const ExpressionType& matrix) : m_expression(matrix) {}
|
|
|
|
EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR inline Index rows() const EIGEN_NOEXCEPT { return m_expression.rows(); }
|
|
EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR inline Index cols() const EIGEN_NOEXCEPT { return m_expression.cols(); }
|
|
|
|
EIGEN_DEVICE_FUNC operator const ExpressionType&() const { return m_expression; }
|
|
|
|
EIGEN_DEVICE_FUNC const ExpressionType& nestedExpression() const { return m_expression; }
|
|
|
|
protected:
|
|
const ExpressionType m_expression;
|
|
};
|
|
|
|
/** \returns an expression of the temporary version of *this.
|
|
*/
|
|
template<typename Derived>
|
|
EIGEN_DEVICE_FUNC inline const NestByValue<Derived>
|
|
DenseBase<Derived>::nestByValue() const
|
|
{
|
|
return NestByValue<Derived>(derived());
|
|
}
|
|
|
|
namespace internal {
|
|
|
|
// Evaluator of Solve -> eval into a temporary
|
|
template<typename ArgType>
|
|
struct evaluator<NestByValue<ArgType> >
|
|
: public evaluator<ArgType>
|
|
{
|
|
typedef evaluator<ArgType> Base;
|
|
|
|
EIGEN_DEVICE_FUNC explicit evaluator(const NestByValue<ArgType>& xpr)
|
|
: Base(xpr.nestedExpression())
|
|
{}
|
|
};
|
|
}
|
|
|
|
} // end namespace Eigen
|
|
|
|
#endif // EIGEN_NESTBYVALUE_H
|
|
|