syntax_data: {"ast_node_type":"variable","tokens":[{"end":49,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:             let len: u64 = match base_ty.kind() {
context_before:             let base_ty = base_place.ty(self.body, self.tcx).ty;
context_after:                 ty::Array(_, size) => size