iterable.js - mozsearch

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/* Any copyright is dedicated to the Public Domain.

 * http://creativecommons.org/licenses/publicdomain/ */

let length;

let iterable = {

   [Symbol.iterator]() { return this; },

   next() { length = arguments.length; return {done: true}; }

};

new Map(iterable);

// ensure no arguments are passed to next() during construction (Bug 1197095)

assertEq(length, 0);

let typeofThis;

Object.defineProperty(Number.prototype, Symbol.iterator, {

  value() {

    "use strict";

    typeofThis = typeof this;

    return { next() { return {done: true}; } };

});

new Map(0);

// ensure that iterable objects retain their type (Bug 1197094)

assertEq(typeofThis, "number");

if (typeof reportCompare === "function")

  reportCompare(0, 0);