{"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"(&ty::Array(_,"}]}
        (&ty::Array(_, len), &ty::Slice(_)) => cx.const_usize(
    match (source.kind(), target.kind()) {
            len.try_to_target_usize(cx.tcx()).expect("expected monomorphic const in codegen"),