SpECTRE
v2024.12.16
|
Tag which is either a SimpleTag for quantities on an interface, base tag to a compute item which acts on tags on an interface, or base tag to a compute item which slices a tag from the volume to an interface. More...
#include <Tags.hpp>
Public Types | |
using | tag = Tag |
using | type = std::unordered_map<::Direction< DirectionsTag::volume_dim >, typename Tag::type > |
Static Public Member Functions | |
static std::string | name () |
Tag which is either a SimpleTag for quantities on an interface, base tag to a compute item which acts on tags on an interface, or base tag to a compute item which slices a tag from the volume to an interface.
The contained object will be a map from Direction to the item type of Tag
, with the set of directions being those produced by DirectionsTag
.
If a SimpleTag is desired on the interface, then this tag can be added to the DataBox directly. If a ComputeTag which acts on Tags on the interface is desired, then the tag should be added using InterfaceCompute
. If a ComputeTag which slices a TensorTag or a VariablesTag in the volume to an Interface is desired, then it should be added using Slice
. In all cases, the tag can then be retrieved using Tags::Interface<DirectionsTag, Tag>
.
DirectionsTag | the item of directions |
Tag | the tag labeling the item |