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.
40 lines
1.5 KiB
40 lines
1.5 KiB
2 years ago
|
'use strict';
|
||
|
|
var $ = require('../internals/export');
|
||
|
|
var createIteratorConstructor = require('../internals/create-iterator-constructor');
|
||
|
|
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 { value: undefined, done: true };
|
||
|
|
point = charAt(string, index);
|
||
|
|
state.index += point.length;
|
||
|
|
return { value: { codePoint: codeAt(point, 0), position: index }, done: 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)));
|
||
|
|
}
|
||
|
|
});
|