50 lines
1.9 KiB
JavaScript
50 lines
1.9 KiB
JavaScript
|
'use strict';
|
||
|
|
var call = require('../internals/function-call');
|
||
|
|
var anObject = require('../internals/an-object');
|
||
|
|
var create = require('../internals/object-create');
|
||
|
|
var getMethod = require('../internals/get-method');
|
||
|
|
var defineBuiltIns = require('../internals/define-built-ins');
|
||
|
|
var InternalStateModule = require('../internals/internal-state');
|
||
|
|
var getBuiltIn = require('../internals/get-built-in');
|
||
|
|
var AsyncIteratorPrototype = require('../internals/async-iterator-prototype');
|
||
|
|
var createIterResultObject = require('../internals/create-iter-result-object');
|
||
|
|
|
||
|
|
var Promise = getBuiltIn('Promise');
|
||
|
|
|
||
|
|
var ASYNC_FROM_SYNC_ITERATOR = 'AsyncFromSyncIterator';
|
||
|
|
var setInternalState = InternalStateModule.set;
|
||
|
|
var getInternalState = InternalStateModule.getterFor(ASYNC_FROM_SYNC_ITERATOR);
|
||
|
|
|
||
|
|
var asyncFromSyncIteratorContinuation = function (result, resolve, reject) {
|
||
|
|
var done = result.done;
|
||
|
|
Promise.resolve(result.value).then(function (value) {
|
||
|
|
resolve(createIterResultObject(value, done));
|
||
|
|
}, reject);
|
||
|
|
};
|
||
|
|
|
||
|
|
var AsyncFromSyncIterator = function AsyncIterator(iteratorRecord) {
|
||
|
|
iteratorRecord.type = ASYNC_FROM_SYNC_ITERATOR;
|
||
|
|
setInternalState(this, iteratorRecord);
|
||
|
|
};
|
||
|
|
|
||
|
|
AsyncFromSyncIterator.prototype = defineBuiltIns(create(AsyncIteratorPrototype), {
|
||
|
|
next: function next() {
|
||
|
|
var state = getInternalState(this);
|
||
|
|
return new Promise(function (resolve, reject) {
|
||
|
|
var result = anObject(call(state.next, state.iterator));
|
||
|
|
asyncFromSyncIteratorContinuation(result, resolve, reject);
|
||
|
|
});
|
||
|
|
},
|
||
|
|
'return': function () {
|
||
|
|
var iterator = getInternalState(this).iterator;
|
||
|
|
return new Promise(function (resolve, reject) {
|
||
|
|
var $return = getMethod(iterator, 'return');
|
||
|
|
if ($return === undefined) return resolve(createIterResultObject(undefined, true));
|
||
|
|
var result = anObject(call($return, iterator));
|
||
|
|
asyncFromSyncIteratorContinuation(result, resolve, reject);
|
||
|
|
});
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
module.exports = AsyncFromSyncIterator;
|