{"ast_node_type":"variable","tokens":[{"end":51,"kind":"keyword","start":0,"text":"let"}]}
                    let a = parse_align_seq(a, s)?;
                    let v_size = parse_size(&s[1..], "v")?;
                    if let Some(v) = dl.vector_align.iter_mut().find(|v| v.0 == v_size) {