{"ast_node_type":"other","tokens":[{"end":35,"kind":"keyword","start":0,"text":"//"}]}
        // so no need for ConstArg.
        // Sort of affects the type system, but only for the purpose of diagnostics
        Node::Ty(&hir::Ty { kind: TyKind::Typeof(ref e), span, .. }) if e.hir_id == hir_id => {