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Use fix<> API to specify compile-time reshaped sizes.

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This commit is contained in:
Gael Guennebaud
2017-01-29 15:20:35 +01:00
parent 9036cda364
commit 24409f3acd
8 changed files with 68 additions and 94 deletions
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15
Eigen/src/Core/DenseBase.h
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@@ -557,20 +557,6 @@ template<typename Derived> class DenseBase
}
EIGEN_DEVICE_FUNC void reverseInPlace();
EIGEN_DEVICE_FUNC inline
Reshaped<Derived> reshaped(Index nRows, Index nCols);
EIGEN_DEVICE_FUNC inline
const Reshaped<const Derived> reshaped(Index nRows, Index nCols) const;
template<int ReshapeRows, int ReshapeCols>
EIGEN_DEVICE_FUNC
inline Reshaped<Derived, ReshapeRows, ReshapeCols> reshaped();
template<int ReshapeRows, int ReshapeCols>
EIGEN_DEVICE_FUNC
inline const Reshaped<const Derived, ReshapeRows, ReshapeCols> reshaped() const;
#define EIGEN_CURRENT_STORAGE_BASE_CLASS Eigen::DenseBase
#define EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL
#define EIGEN_DOC_BLOCK_ADDONS_INNER_PANEL_IF(COND)
@@ -578,6 +564,7 @@ template<typename Derived> class DenseBase
# include "../plugins/CommonCwiseUnaryOps.h"
# include "../plugins/BlockMethods.h"
# include "../plugins/IndexedViewMethods.h"
# include "../plugins/ReshapedMethods.h"
# ifdef EIGEN_DENSEBASE_PLUGIN
# include EIGEN_DENSEBASE_PLUGIN
# endif

63
Eigen/src/Core/Reshape.h → Eigen/src/Core/Reshaped.h
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@@ -197,8 +197,8 @@ template<typename XprType, int Rows, int Cols, int Order, bool HasDirectAccess>
protected:
MatrixTypeNested m_xpr;
const internal::variable_if_dynamic<Index, RowsAtCompileTime> m_rows;
const internal::variable_if_dynamic<Index, ColsAtCompileTime> m_cols;
const internal::variable_if_dynamic<Index, Rows> m_rows;
const internal::variable_if_dynamic<Index, Cols> m_cols;
};
@@ -424,65 +424,6 @@ protected:
} // end namespace internal
/** \returns a dynamic-size expression of a reshape in *this.
*
* \param reshapeRows the number of rows in the reshape
* \param reshapeCols the number of columns in the reshape
*
* Example: \include MatrixBase_reshape_int_int.cpp
* Output: \verbinclude MatrixBase_reshape_int_int.out
*
* \note Even though the returned expression has dynamic size, in the case
* when it is applied to a fixed-size matrix, it inherits a fixed maximal size,
* which means that evaluating it does not cause a dynamic memory allocation.
*
* \sa class Reshape, reshaped()
*/
template<typename Derived>
EIGEN_DEVICE_FUNC
inline Reshaped<Derived> DenseBase<Derived>::reshaped(Index reshapeRows, Index reshapeCols)
{
return Reshaped<Derived>(derived(), reshapeRows, reshapeCols);
}
/** This is the const version of reshaped(Index,Index). */
template<typename Derived>
EIGEN_DEVICE_FUNC
inline const Reshaped<const Derived> DenseBase<Derived>::reshaped(Index reshapeRows, Index reshapeCols) const
{
return Reshaped<const Derived>(derived(), reshapeRows, reshapeCols);
}
/** \returns a fixed-size expression of a reshape in *this.
*
* The template parameters \a ReshapeRows and \a ReshapeCols are the number of
* rows and columns in the reshape.
*
* Example: \include MatrixBase_reshape.cpp
* Output: \verbinclude MatrixBase_reshape.out
*
* \note since reshape is a templated member, the keyword template has to be used
* if the matrix type is also a template parameter: \code m.template reshape<3,3>(); \endcode
*
* \sa class Reshape, reshaped(Index,Index)
*/
template<typename Derived>
template<int ReshapeRows, int ReshapeCols>
EIGEN_DEVICE_FUNC
inline Reshaped<Derived, ReshapeRows, ReshapeCols> DenseBase<Derived>::reshaped()
{
return Reshaped<Derived, ReshapeRows, ReshapeCols>(derived());
}
/** This is the const version of reshape<>(Index, Index). */
template<typename Derived>
template<int ReshapeRows, int ReshapeCols>
EIGEN_DEVICE_FUNC
inline const Reshaped<const Derived, ReshapeRows, ReshapeCols> DenseBase<Derived>::reshaped() const
{
return Reshaped<const Derived, ReshapeRows, ReshapeCols>(derived());
}
} // end namespace Eigen
#endif // EIGEN_RESHAPED_H

46
Eigen/src/plugins/ReshapedMethods.h Normal file
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@@ -0,0 +1,46 @@
/// \returns as expression of \c *this with reshaped sizes.
///
/// \param nRows the number of rows in the reshaped expression, specified at either run-time or compile-time
/// \param nCols the number of columns in the reshaped expression, specified at either run-time or compile-time
/// \tparam NRowsType the type of the value handling the number of rows, typically Index.
/// \tparam NColsType the type of the value handling the number of columns, typically Index.
///
/// Dynamic size example: \include MatrixBase_reshaped_int_int.cpp
/// Output: \verbinclude MatrixBase_reshaped_int_int.out
///
/// The number of rows \a nRows and columns \a nCols can also be specified at compile-time by passing Eigen::fix<N>,
/// or Eigen::fix<N>(n) as arguments. In the later case, \c n plays the role of a runtime fallback value in case \c N equals Eigen::Dynamic.
/// Here is an example with a fixed number of rows and columns:
/// \include MatrixBase_reshaped_fixed.cpp
/// Output: \verbinclude MatrixBase_reshaped_fixed.out
///
/// \sa class Reshaped, fix, fix<N>(int)
///
template<typename NRowsType, typename NColsType>
EIGEN_DEVICE_FUNC
#ifndef EIGEN_PARSED_BY_DOXYGEN
inline Reshaped<Derived,internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>
#else
inline Reshaped<Derived,...>
#endif
reshaped(NRowsType nRows, NColsType nCols)
{
return Reshaped<Derived,internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>(
derived(), internal::get_runtime_value(nRows), internal::get_runtime_value(nCols));
}
/** This is the const version of reshaped(NRowsType,NColsType). */
template<typename NRowsType, typename NColsType>
EIGEN_DEVICE_FUNC
#ifndef EIGEN_PARSED_BY_DOXYGEN
inline const Reshaped<const Derived,internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>
#else
inline const Reshaped<const Derived,...>
#endif
reshaped(NRowsType nRows, NColsType nCols) const
{
return Reshaped<const Derived,internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>(
derived(), internal::get_runtime_value(nRows), internal::get_runtime_value(nCols));
}