syntax_data: {"ast_node_type":"other","tokens":[{"end":47,"kind":"keyword","start":0,"text":"match"}]}
source_snippet:                 match arg.layout.backend_repr {
context_before:                 //`Aggregate` entirely here, but some targets need to be fixed first.
context_after:                     BackendRepr::Scalar(_) | BackendRepr::SimdVector { .. } => {}