Lightweight sparsity descriptor satisfying the SparsityImplementation concept required by the MatrixCSR constructor. More...

#include <matmul.h>

Public Member Functions
std::shared_ptr< const common::IndexMap >	index_map (int dim) const
	Return the row (dim == 0) or column (dim == 1) IndexMap.
int	block_size (int i) const
	Return the block size.
std::pair< std::span< const std::int32_t >, std::span< const std::int64_t > >	graph () const
	Return the CSR graph as (column_indices, row_pointers).
std::span< const std::int32_t >	off_diagonal_offsets () const
	Return the per-row diagonal block sizes (see _off_diag).

Detailed Description

Lightweight sparsity descriptor satisfying the SparsityImplementation concept required by the MatrixCSR constructor.

Holds non-owning views into externally managed CSR arrays together with the row and column IndexMaps that describe the parallel distribution. It is intended as a short-lived helper: to be constructed it from the output of impl::matmul and passed to the MatrixCSR constructor.

Note: All spans must remain valid for the lifetime of this object.

The documentation for this struct was generated from the following file:

/__w/dolfinx/dolfinx/cpp/dolfinx/la/matmul.h

Public Member Functions

Detailed Description