{"ast_node_type":"other","tokens":[{"end":22,"kind":"keyword","start":0,"text":"ret:"}]}
    ret: CPlace<'tcx>,
    y: CValue<'tcx>,
    f: &dyn Fn(&mut FunctionCx<'_, '_, 'tcx>, Ty<'tcx>, Ty<'tcx>, Value, Value) -> Value,