syntax_data: {"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"ty::Pat(ty,"}]}
source_snippet:             ty::Pat(ty, _) | ty::Array(ty, _) | ty::Slice(ty) => {
context_after:                 ty::Binder::dummy(AutoImplConstituents { types: vec![ty], assumptions: vec![] })