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.
31 lines
1.1 KiB
31 lines
1.1 KiB
'use strict';
|
|
var call = require('../internals/function-call');
|
|
var isCallable = require('../internals/is-callable');
|
|
var anObject = require('../internals/an-object');
|
|
var getIteratorDirect = require('../internals/get-iterator-direct');
|
|
var getIteratorMethod = require('../internals/get-iterator-method');
|
|
var getMethod = require('../internals/get-method');
|
|
var wellKnownSymbol = require('../internals/well-known-symbol');
|
|
var AsyncFromSyncIterator = require('../internals/async-from-sync-iterator');
|
|
|
|
var ASYNC_ITERATOR = wellKnownSymbol('asyncIterator');
|
|
|
|
module.exports = function (obj) {
|
|
var object = anObject(obj);
|
|
var alreadyAsync = true;
|
|
var method = getMethod(object, ASYNC_ITERATOR);
|
|
var iterator;
|
|
if (!isCallable(method)) {
|
|
method = getIteratorMethod(object);
|
|
alreadyAsync = false;
|
|
}
|
|
if (method !== undefined) {
|
|
iterator = call(method, object);
|
|
} else {
|
|
iterator = object;
|
|
alreadyAsync = true;
|
|
}
|
|
anObject(iterator);
|
|
return getIteratorDirect(alreadyAsync ? iterator : new AsyncFromSyncIterator(getIteratorDirect(iterator)));
|
|
};
|