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- 'use strict';
- var $ = require('../internals/export');
- var createIteratorConstructor = require('../internals/iterator-create-constructor');
- var createIterResultObject = require('../internals/create-iter-result-object');
- var requireObjectCoercible = require('../internals/require-object-coercible');
- var toString = require('../internals/to-string');
- var InternalStateModule = require('../internals/internal-state');
- var StringMultibyteModule = require('../internals/string-multibyte');
-
- var codeAt = StringMultibyteModule.codeAt;
- var charAt = StringMultibyteModule.charAt;
- var STRING_ITERATOR = 'String Iterator';
- var setInternalState = InternalStateModule.set;
- var getInternalState = InternalStateModule.getterFor(STRING_ITERATOR);
-
- // TODO: unify with String#@@iterator
- var $StringIterator = createIteratorConstructor(function StringIterator(string) {
- setInternalState(this, {
- type: STRING_ITERATOR,
- string: string,
- index: 0
- });
- }, 'String', function next() {
- var state = getInternalState(this);
- var string = state.string;
- var index = state.index;
- var point;
- if (index >= string.length) return createIterResultObject(undefined, true);
- point = charAt(string, index);
- state.index += point.length;
- return createIterResultObject({ codePoint: codeAt(point, 0), position: index }, false);
- });
-
- // `String.prototype.codePoints` method
- // https://github.com/tc39/proposal-string-prototype-codepoints
- $({ target: 'String', proto: true, forced: true }, {
- codePoints: function codePoints() {
- return new $StringIterator(toString(requireObjectCoercible(this)));
- }
- });
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