| 1 | 'use strict';
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| 2 |
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| 3 | var $ = require('../internals/export');
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| 4 | var anObject = require('../internals/an-object');
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| 5 | var createAsyncIteratorProxy = require('../internals/async-iterator-create-proxy');
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| 6 |
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| 7 | var AsyncIteratorProxy = createAsyncIteratorProxy(function (arg, Promise) {
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| 8 | var state = this;
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| 9 | var iterator = state.iterator;
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| 10 |
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| 11 | return Promise.resolve(anObject(state.next.call(iterator, arg))).then(function (step) {
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| 12 | if (anObject(step).done) {
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| 13 | state.done = true;
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| 14 | return { done: true, value: undefined };
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| 15 | }
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| 16 | return { done: false, value: [state.index++, step.value] };
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| 17 | });
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| 18 | });
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| 19 |
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| 20 | $({ target: 'AsyncIterator', proto: true, real: true }, {
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| 21 | asIndexedPairs: function asIndexedPairs() {
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| 22 | return new AsyncIteratorProxy({
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| 23 | iterator: anObject(this),
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| 24 | index: 0
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| 25 | });
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| 26 | }
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| 27 | });
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