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      var l = e[t], o = n ? n(l) : l;
      if (l = r || l !== 0 ? l : 0, a && o === o) {
        for (var d = f.length; d--; )
          if (f[d] === o)
            continue e;
        n && f.push(o), u.push(l);
      } else
        i(f, o, r) || (f !== u && f.push(o), u.push(l));
    }
  return u;
}
var kt = on(function(e) {
  return Vt(Se(e, 1, dn, !0));
});
const ei = kt;
var ni = "\0", w = "\0", be = "
";
class Ze {
  constructor(n = {}) {
    this._isDirected = E(n, "directed") ? n.directed : !0, this._isMultigraph = E(n, "multigraph") ? n.multigraph : !1, this._isCompound = E(n, "compound") ? n.compound : !1, this._label = void 0, this._defaultNodeLabelFn = M(void 0), this._defaultEdgeLabelFn = M(void 0), this._nodes = {}, this._isCompound && (this._parent = {}, this._children = {}, this._children[w] = {}), this._in = {}, this._preds = {}, this._out = {}, this._sucs = {}, this._edgeObjs = {}, this._edgeLabels = {};
  }
  /* === Graph functions ========= */
  isDirected() {
    return this._isDirected;
  }
  isMultigraph() {
    return this._isMultigraph;
  }
  isCompound() {
    return this._isCompound;
  }
  setGraph(n) {
    return this._label = n, this;
  }
  graph() {
    return this._label;
  }
  /* === Node functions ========== */
  setDefaultNodeLabel(n) {
    return te(n) || (n = M(n)), this._defaultNodeLabelFn = n, this;
  }
  nodeCount() {
    return this._nodeCount;
  }
  nodes() {
    return T(this._nodes);
  }
  sources() {
    var n = this;
    return D(this.nodes(), function(r) {
      return ie(n._in[r]);
    });
  }
  sinks() {
    var n = this;
    return D(this.nodes(), function(r) {
      return ie(n._out[r]);
    });
  }
  setNodes(n, r) {
    var t = arguments, i = this;
    return m(n, function(s) {
      t.length > 1 ? i.setNode(s, r) : i.setNode(s);
    }), this;
  }
  setNode(n, r) {
    return E(this._nodes, n) ? (arguments.length > 1 && (this._nodes[n] = r), this) : (this._nodes[n] = arguments.length > 1 ? r : this._defaultNodeLabelFn(n), this._isCompound && (this._parent[n] = w, this._children[n] = {}, this._children[w][n] = !0), this._in[n] = {}, this._preds[n] = {}, this._out[n] = {}, this._sucs[n] = {}, ++this._nodeCount, this);
  }
  node(n) {
    return this._nodes[n];
  }
  hasNode(n) {
    return E(this._nodes, n);
  }
  removeNode(n) {
    var r = this;
    if (E(this._nodes, n)) {
      var t = function(i) {
        r.removeEdge(r._edgeObjs[i]);
      };
      delete this._nodes[n], this._isCompound && (this._removeFromParentsChildList(n), delete this._parent[n], m(this.children(n), function(i) {
        r.setParent(i);
      }), delete this._children[n]), m(T(this._in[n]), t), delete this._in[n], delete this._preds[n], m(T(this._out[n]), t), delete this._out[n], delete this._sucs[n], --this._nodeCount;
    }
    return this;
  }
  setParent(n, r) {
    if (!this._isCompound)
      throw new Error("Cannot set parent in a non-compound graph");
    if (v(r))
      r = w;
    else {
      r += "";
      for (var t = r; !v(t); t = this.parent(t))
        if (t === n)
          throw new Error("Setting " + r + " as parent of " + n + " would create a cycle");
      this.setNode(r);
    }
    return this.setNode(n), this._removeFromParentsChildList(n), this._parent[n] = r, this._children[r][n] = !0, this;
  }
  _removeFromParentsChildList(n) {
    delete this._children[this._parent[n]][n];
  }
  parent(n) {
    if (this._isCompound) {
      var r = this._parent[n];
      if (r !== w)
        return r;
    }
  }
  children(n) {
    if (v(n) && (n = w), this._isCompound) {
      var r = this._children[n];
      if (r)
        return T(r);
    } else {
      if (n === w)
        return this.nodes();
      if (this.hasNode(n))
        return [];
    }
  }
  predecessors(n) {
    var r = this._preds[n];
    if (r)
      return T(r);
  }
  successors(n) {
    var r = this._sucs[n];
    if (r)
      return T(r);
  }
  neighbors(n) {
    var r = this.predecessors(n);
    if (r)
      return ei(r, this.successors(n));
  }
  isLeaf(n) {
    var r;
    return this.isDirected() ? r = this.successors(n) : r = this.neighbors(n), r.length === 0;
  }
  filterNodes(n) {
    var r = new this.constructor({
      directed: this._isDirected,
      multigraph: this._isMultigraph,
      compound: this._isCompound
    });
    r.setGraph(this.graph());
    var t = this;
    m(this._nodes, function(a, u) {
      n(u) && r.setNode(u, a);
    }), m(this._edgeObjs, function(a) {
      r.hasNode(a.v) && r.hasNode(a.w) && r.setEdge(a, t.edge(a));
    });
    var i = {};
    function s(a) {
      var u = t.parent(a);
      return u === void 0 || r.hasNode(u) ? (i[a] = u, u) : u in i ? i[u] : s(u);
    }
    return this._isCompound && m(r.nodes(), function(a) {
      r.setParent(a, s(a));
    }), r;
  }
  /* === Edge functions ========== */
  setDefaultEdgeLabel(n) {
    return te(n) || (n = M(n)), this._defaultEdgeLabelFn = n, this;
  }
  edgeCount() {
    return this._edgeCount;
  }
  edges() {
    return H(this._edgeObjs);
  }
  setPath(n, r) {
    var t = this, i = arguments;
    return Xt(n, function(s, a) {
      return i.length > 1 ? t.setEdge(s, a, r) : t.setEdge(s, a), a;
    }), this;
  }
  /*
   * setEdge(v, w, [value, [name]])
   * setEdge({ v, w, [name] }, [value])
   */
  setEdge() {
    var n, r, t, i, s = !1, a = arguments[0];
    typeof a == "object" && a !== null && "v" in a ? (n = a.v, r = a.w, t = a.name, arguments.length === 2 && (i = arguments[1], s = !0)) : (n = a, r = arguments[1], t = arguments[3], arguments.length > 2 && (i = arguments[2], s = !0)), n = "" + n, r = "" + r, v(t) || (t = "" + t);
    var u = P(this._isDirected, n, r, t);
    if (E(this._edgeLabels, u))
      return s && (this._edgeLabels[u] = i), this;
    if (!v(t) && !this._isMultigraph)
      throw new Error("Cannot set a named edge when isMultigraph = false");
    this.setNode(n), this.setNode(r), this._edgeLabels[u] = s ? i : this._defaultEdgeLabelFn(n, r, t);
    var f = ri(this._isDirected, n, r, t);
    return n = f.v, r = f.w, Object.freeze(f), this._edgeObjs[u] = f, ye(this._preds[r], n), ye(this._sucs[n], r), this._in[r][u] = f, this._out[n][u] = f, this._edgeCount++, this;
  }
  edge(n, r, t) {
    var i = arguments.length === 1 ? Y(this._isDirected, arguments[0]) : P(this._isDirected, n, r, t);
    return this._edgeLabels[i];
  }
  hasEdge(n, r, t) {
    var i = arguments.length === 1 ? Y(this._isDirected, arguments[0]) : P(this._isDirected, n, r, t);
    return E(this._edgeLabels, i);
  }
  removeEdge(n, r, t) {
    var i = arguments.length === 1 ? Y(this._isDirected, arguments[0]) : P(this._isDirected, n, r, t), s = this._edgeObjs[i];
    return s && (n = s.v, r = s.w, delete this._edgeLabels[i], delete this._edgeObjs[i], Ae(this._preds[r], n), Ae(this._sucs[n], r), delete this._in[r][i], delete this._out[n][i], this._edgeCount--), this;
  }
  inEdges(n, r) {
    var t = this._in[n];
    if (t) {
      var i = H(t);
      return r ? D(i, function(s) {
        return s.v === r;
      }) : i;
    }
  }
  outEdges(n, r) {
    var t = this._out[n];
    if (t) {
      var i = H(t);
      return r ? D(i, function(s) {
        return s.w === r;
      }) : i;
    }
  }
  nodeEdges(n, r) {
    var t = this.inEdges(n, r);
    if (t)
      return t.concat(this.outEdges(n, r));
  }
}
Ze.prototype._nodeCount = 0;
Ze.prototype._edgeCount = 0;
function ye(e, n) {
  e[n] ? e[n]++ : e[n] = 1;
}
function Ae(e, n) {
  --e[n] || delete e[n];
}
function P(e, n, r, t) {
  var i = "" + n, s = "" + r;
  if (!e && i > s) {
    var a = i;
    i = s, s = a;
  }
  return i + be + s + be + (v(t) ? ni : t);
}
function ri(e, n, r, t) {
  var i = "" + n, s = "" + r;
  if (!e && i > s) {
    var a = i;
    i = s, s = a;
  }
  var u = { v: i, w: s };
  return t && (u.name = t), u;
}
function Y(e, n) {
  return P(e, n.v, n.w, n.name);
}
export {
  Ze as G,
  Q as a,
  Se as b,
  j as c,
  Ye as d,
  cn as e,
  m as f,
  ee as g,
  E as h,
  v as i,
  ve as j,
  T as k,
  Bt as l,
  Dt as m,
  Ie as n,
  Ce as o,
  It as p,
  Pn as q,
  D as r,
  Xt as s,
  U as t,
  H as v
};