A container for boundary directions of an n-dimensional volume. More...

#include <BoundaryIter.hpp>

Public Member Functions
constexpr	BoundaryDirectionsContainer (T_LowHaloVec const &lowerHaloSizes, T_UpHaloVec const &upperHaloSizes)
constexpr BoundaryDirectionIter< T_dim, T_LowHaloVec, T_UpHaloVec >	begin () const
constexpr BoundaryDirectionIter< T_dim, T_LowHaloVec, T_UpHaloVec >	end () const

Static Public Member Functions
static consteval auto	dim ()
static consteval uint32_t	length ()

Detailed Description

template<uint32_t T_dim, concepts::Vector T_LowHaloVec, concepts::Vector T_UpHaloVec>
struct alpaka::BoundaryDirectionsContainer< T_dim, T_LowHaloVec, T_UpHaloVec >

A container for boundary directions of an n-dimensional volume.

This class implements begin(), end(), and length(), and can be iterated over. This is useful for stencil codes, where boundary conditions exist, that need to only be applied to elements on the borders of memory. To create a BoundaryDirectionsContainer for a memory object, see makeBoundaryDirIterator.

A 0D boundary direction is a single value, a 1D boundary direction is a "line", for example edges of a cube, a 2D boundary direction is a "plane", for example the sides of a cube.

For example, a 1-dimensional (1D) volume has two 0D ends and a 1D center. A 2D volume has 4 0D corners, 4 1D edges, and one 2D center. In general, there are 3^n boundaries for an nD volume.

Template Parameters

T_dim	The dimensionality of the volume that this contains boundaries for.
T_LowHaloVec	The vector type used for the lower halo sizes.
T_UpHaloVec	The vector type used for the upper halo sizes.

Definition at line 236 of file BoundaryIter.hpp.