diff options
| author |  Gael Guennebaud <g.gael@free.fr> | 2017-01-10 14:25:30 +0100 |
|---|---|---|
| committer | Gael Guennebaud <g.gael@free.fr> | 2017-01-10 14:25:30 +0100 |
| commit | 87963f441c9abd8514b94b6b2c712652d646ed64 (patch) | |
| tree | 9988b56b0a9d0692b76072d9298ddb488be2e660 /Eigen/src/Core/DenseBase.h | |
| parent | a98c7efb163a1183d61ae56cacc7d903057285f0 (diff) | |
Fallback to Block<> when possible (Index, all, seq with > increment).
This is important to take advantage of the optimized implementations (evaluator, products, etc.),
and to support sparse matrices.
Diffstat (limited to 'Eigen/src/Core/DenseBase.h')
| -rw-r--r-- | Eigen/src/Core/DenseBase.h | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/Eigen/src/Core/DenseBase.h b/Eigen/src/Core/DenseBase.h index 07057ce69..7c01e9328 100644 --- a/Eigen/src/Core/DenseBase.h +++ b/Eigen/src/Core/DenseBase.h @@ -558,14 +558,35 @@ template<typename Derived> class DenseBase EIGEN_DEVICE_FUNC void reverseInPlace(); template<typename RowIndices, typename ColIndices> + struct IndexedViewType { + typedef IndexedView<const Derived,typename internal::MakeIndexing<RowIndices>::type,typename internal::MakeIndexing<ColIndices>::type> type; + }; + + template<typename RowIndices, typename ColIndices> typename internal::enable_if< - !(internal::is_integral<RowIndices>::value && internal::is_integral<ColIndices>::value), - IndexedView<const Derived,typename internal::MakeIndexing<RowIndices>::type,typename internal::MakeIndexing<ColIndices>::type> >::type + ! (internal::traits<typename IndexedViewType<RowIndices,ColIndices>::type>::IsBlockAlike + || (internal::is_integral<RowIndices>::value && internal::is_integral<ColIndices>::value)), + typename IndexedViewType<RowIndices,ColIndices>::type >::type operator()(const RowIndices& rowIndices, const ColIndices& colIndices) const { - return IndexedView<const Derived,typename internal::MakeIndexing<RowIndices>::type,typename internal::MakeIndexing<ColIndices>::type>( + return typename IndexedViewType<RowIndices,ColIndices>::type( derived(), internal::make_indexing(rowIndices,derived().rows()), internal::make_indexing(colIndices,derived().cols())); } + template<typename RowIndices, typename ColIndices> + typename internal::enable_if< + internal::traits<typename IndexedViewType<RowIndices,ColIndices>::type>::IsBlockAlike, + typename internal::traits<typename IndexedViewType<RowIndices,ColIndices>::type>::BlockType>::type + operator()(const RowIndices& rowIndices, const ColIndices& colIndices) const { + typedef typename internal::traits<typename IndexedViewType<RowIndices,ColIndices>::type>::BlockType BlockType; + typename internal::MakeIndexing<RowIndices>::type actualRowIndices = internal::make_indexing(rowIndices,derived().rows()); + typename internal::MakeIndexing<ColIndices>::type actualColIndices = internal::make_indexing(colIndices,derived().cols()); + return BlockType(derived(), + internal::first(actualRowIndices), + internal::first(actualColIndices), + internal::size(actualRowIndices), + internal::size(actualColIndices)); + } + template<typename RowIndicesT, std::size_t RowIndicesN, typename ColIndices> IndexedView<const Derived,const RowIndicesT (&)[RowIndicesN],typename internal::MakeIndexing<ColIndices>::type> operator()(const RowIndicesT (&rowIndices)[RowIndicesN], const ColIndices& colIndices) const { |