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.
30 lines
1.1 KiB
30 lines
1.1 KiB
'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/define-iterator'); |
|
|
|
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 { value: undefined, done: true }; |
|
point = charAt(string, index); |
|
state.index += point.length; |
|
return { value: point, done: false }; |
|
});
|
|
|