js/src/builtin/WeakSet.js


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/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

// ES2017 draft rev 0e10c9f29fca1385980c08a7d5e7bb3eb775e2e4
// 23.4.1.1 WeakSet, steps 6-8
function WeakSetConstructorInit(iterable) {
  var set = this;

  // Step 6.a.
  var adder = set.add;

  // Step 6.b.
  if (!IsCallable(adder)) {
    ThrowTypeError(JSMSG_NOT_FUNCTION, typeof adder);
  }

  // Steps 6.c-8.
  for (var nextValue of allowContentIter(iterable)) {
    callContentFunction(adder, set, nextValue);
  }
}