syntax_data: {"ast_node_type":"other","tokens":[{"end":48,"kind":"keyword","start":0,"text":"Slice(t)"}]}
source_snippet:             Slice(t) => write!(f, "[{:?}]", &t),
context_before:             Pat(t, p) => write!(f, "pattern_type!({t:?} is {p:?})"),
context_after:             RawPtr(ty, mutbl) => write!(f, "*{} {:?}", mutbl.ptr_str(), ty),