Function rN

resources/vega.min.js:30102–30183

(t)

    return e;
  }
  function rN(t) {
    return "[" === t[0]
      ? (function (t) {
          const e = t.length;
          let n,
            r = 1;
          if (((r = eN(t, r, Iz, jz, Iz)), r === e))
            throw "Empty between selector: " + t;
          if (((n = nN(t.substring(1, r))), 2 !== n.length))
            throw "Between selector must have two elements: " + t;
          if (((t = t.slice(r + 1).trim()), t[0] !== Xz))
            throw "Expected '>' after between selector: " + t;
          n = n.map(rN);
          const i = rN(t.slice(1).trim());
          if (i.between) return { between: n, stream: i };
          i.between = n;
          return i;
        })(t)
      : (function (t) {
          const e = { source: Qz },
            n = [];
          let r,
            i,
            o = [0, 0],
            a = 0,
            s = 0,
            u = t.length,
            l = 0;
          if (t[u - 1] === Hz) {
            if (((l = t.lastIndexOf(Wz)), !(l >= 0)))
              throw "Unmatched right brace: " + t;
            try {
              o = (function (t) {
                const e = t.split(Gz);
                if (!t.length || e.length > 2) throw t;
                return e.map((e) => {
                  const n = +e;
                  if (n != n) throw t;
                  return n;
                });
              })(t.substring(l + 1, u - 1));
            } catch (e) {
              throw "Invalid throttle specification: " + t;
            }
            ((u = (t = t.slice(0, l).trim()).length), (l = 0));
          }
          if (!u) throw t;
          t[0] === Vz && (a = ++l);
          ((r = eN(t, l, Yz)),
            r < u && (n.push(t.substring(s, r).trim()), (s = l = ++r)));
          if (((l = eN(t, l, jz)), l === u)) n.push(t.substring(s, u).trim());
          else if (
            (n.push(t.substring(s, l).trim()), (i = []), (s = ++l), s === u)
          )
            throw "Unmatched left bracket: " + t;
          for (; l < u; ) {
            if (((l = eN(t, l, Iz)), l === u))
              throw "Unmatched left bracket: " + t;