You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
32 lines
1.2 KiB
32 lines
1.2 KiB
3 weeks ago
|
'use strict';
|
||
|
|
var charAt = require('../internals/string-multibyte').charAt;
|
||
|
|
var toString = require('../internals/to-string');
|
||
|
|
var InternalStateModule = require('../internals/internal-state');
|
||
|
|
var defineIterator = require('../internals/iterator-define');
|
||
|
|
var createIterResultObject = require('../internals/create-iter-result-object');
|
||
|
|
|
||
|
|
var STRING_ITERATOR = 'String Iterator';
|
||
|
|
var setInternalState = InternalStateModule.set;
|
||
|
|
var getInternalState = InternalStateModule.getterFor(STRING_ITERATOR);
|
||
|
|
|
||
|
|
// `String.prototype[@@iterator]` method
|
||
|
|
// https://tc39.es/ecma262/#sec-string.prototype-@@iterator
|
||
|
|
defineIterator(String, 'String', function (iterated) {
|
||
|
|
setInternalState(this, {
|
||
|
|
type: STRING_ITERATOR,
|
||
|
|
string: toString(iterated),
|
||
|
|
index: 0
|
||
|
|
});
|
||
|
|
// `%StringIteratorPrototype%.next` method
|
||
|
|
// https://tc39.es/ecma262/#sec-%stringiteratorprototype%.next
|
||
|
|
}, 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(point, false);
|
||
|
|
});
|