1 | 'use strict';
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2 | var bind = require('../internals/function-bind-context');
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3 | var call = require('../internals/function-call');
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4 | var anObject = require('../internals/an-object');
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5 | var tryToString = require('../internals/try-to-string');
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6 | var isArrayIteratorMethod = require('../internals/is-array-iterator-method');
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7 | var lengthOfArrayLike = require('../internals/length-of-array-like');
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8 | var isPrototypeOf = require('../internals/object-is-prototype-of');
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9 | var getIterator = require('../internals/get-iterator');
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10 | var getIteratorMethod = require('../internals/get-iterator-method');
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11 | var iteratorClose = require('../internals/iterator-close');
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12 |
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13 | var $TypeError = TypeError;
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14 |
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15 | var Result = function (stopped, result) {
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16 | this.stopped = stopped;
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17 | this.result = result;
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18 | };
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19 |
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20 | var ResultPrototype = Result.prototype;
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21 |
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22 | module.exports = function (iterable, unboundFunction, options) {
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23 | var that = options && options.that;
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24 | var AS_ENTRIES = !!(options && options.AS_ENTRIES);
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25 | var IS_RECORD = !!(options && options.IS_RECORD);
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26 | var IS_ITERATOR = !!(options && options.IS_ITERATOR);
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27 | var INTERRUPTED = !!(options && options.INTERRUPTED);
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28 | var fn = bind(unboundFunction, that);
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29 | var iterator, iterFn, index, length, result, next, step;
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30 |
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31 | var stop = function (condition) {
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32 | if (iterator) iteratorClose(iterator, 'normal', condition);
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33 | return new Result(true, condition);
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34 | };
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35 |
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36 | var callFn = function (value) {
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37 | if (AS_ENTRIES) {
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38 | anObject(value);
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39 | return INTERRUPTED ? fn(value[0], value[1], stop) : fn(value[0], value[1]);
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40 | } return INTERRUPTED ? fn(value, stop) : fn(value);
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41 | };
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42 |
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43 | if (IS_RECORD) {
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44 | iterator = iterable.iterator;
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45 | } else if (IS_ITERATOR) {
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46 | iterator = iterable;
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47 | } else {
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48 | iterFn = getIteratorMethod(iterable);
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49 | if (!iterFn) throw new $TypeError(tryToString(iterable) + ' is not iterable');
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50 |
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51 | if (isArrayIteratorMethod(iterFn)) {
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52 | for (index = 0, length = lengthOfArrayLike(iterable); length > index; index++) {
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53 | result = callFn(iterable[index]);
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54 | if (result && isPrototypeOf(ResultPrototype, result)) return result;
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55 | } return new Result(false);
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56 | }
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57 | iterator = getIterator(iterable, iterFn);
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58 | }
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59 |
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60 | next = IS_RECORD ? iterable.next : iterator.next;
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61 | while (!(step = call(next, iterator)).done) {
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62 | try {
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63 | result = callFn(step.value);
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64 | } catch (error) {
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65 | iteratorClose(iterator, 'throw', error);
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66 | }
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67 | if (typeof result == 'object' && result && isPrototypeOf(ResultPrototype, result)) return result;
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68 | } return new Result(false);
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69 | };
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