syntax_data: {"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"ty::Str"}]}
source_snippet:             ty::Str => ty::Binder::dummy(AutoImplConstituents {
context_before:             // Treat this like `struct str([u8]);`
context_after:                 types: vec![Ty::new_slice(self.tcx(), self.tcx().types.u8)],