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node_modules/core-js/internals/get-set-record.js

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+'use strict';
+var aCallable = require('../internals/a-callable');
+var anObject = require('../internals/an-object');
+var call = require('../internals/function-call');
+var toIntegerOrInfinity = require('../internals/to-integer-or-infinity');
+var getIteratorDirect = require('../internals/get-iterator-direct');
+
+var INVALID_SIZE = 'Invalid size';
+var $RangeError = RangeError;
+var $TypeError = TypeError;
+var max = Math.max;
+
+var SetRecord = function (set, size, has, keys) {
+  this.set = set;
+  this.size = size;
+  this.has = has;
+  this.keys = keys;
+};
+
+SetRecord.prototype = {
+  getIterator: function () {
+    return getIteratorDirect(anObject(call(this.keys, this.set)));
+  },
+  includes: function (it) {
+    return call(this.has, this.set, it);
+  }
+};
+
+// `GetSetRecord` abstract operation
+// https://tc39.es/proposal-set-methods/#sec-getsetrecord
+module.exports = function (obj) {
+  anObject(obj);
+  var numSize = +obj.size;
+  // NOTE: If size is undefined, then numSize will be NaN
+  // eslint-disable-next-line no-self-compare -- NaN check
+  if (numSize != numSize) throw $TypeError(INVALID_SIZE);
+  var intSize = toIntegerOrInfinity(numSize);
+  if (intSize < 0) throw $RangeError(INVALID_SIZE);
+  return new SetRecord(
+    obj,
+    max(intSize, 0),
+    aCallable(obj.has),
+    aCallable(obj.keys)
+  );
+};