Function Operator

docs/tests/v2/es6/js/sanddance.js:76951–76964

* An Operator is a processing node in a dataflow graph. * Each operator stores a value and an optional value update function. * Operators can accept a hash of named parameters. Parameter values can * either be direct (JavaScript literals, arrays, objects) or indirect * (other operators whose val

(init, update, params, react)

 */

function Operator(init, update, params, react) {
  this.id = ++OP_ID;
  this.value = init;
  this.stamp = -1;
  this.rank = -1;
  this.qrank = -1;
  this.flags = 0;

  if (update) {
    this._update = update;
  }

  if (params) this.parameters(params, react);
}

var prototype = Operator.prototype;
/**