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.
64 lines
2.4 KiB
64 lines
2.4 KiB
2 years ago
|
'use strict';
|
||
|
|
var apply = require('../internals/function-apply');
|
||
|
|
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 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({ done: done, value: value });
|
||
|
|
}, reject);
|
||
|
|
};
|
||
|
|
|
||
|
|
var AsyncFromSyncIterator = function AsyncIterator(iterator) {
|
||
|
|
setInternalState(this, {
|
||
|
|
type: ASYNC_FROM_SYNC_ITERATOR,
|
||
|
|
iterator: anObject(iterator),
|
||
|
|
next: iterator.next
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
AsyncFromSyncIterator.prototype = defineBuiltIns(create(AsyncIteratorPrototype), {
|
||
|
|
next: function next(arg) {
|
||
|
|
var state = getInternalState(this);
|
||
|
|
var hasArg = !!arguments.length;
|
||
|
|
return new Promise(function (resolve, reject) {
|
||
|
|
var result = anObject(apply(state.next, state.iterator, hasArg ? [arg] : []));
|
||
|
|
asyncFromSyncIteratorContinuation(result, resolve, reject);
|
||
|
|
});
|
||
|
|
},
|
||
|
|
'return': function (arg) {
|
||
|
|
var iterator = getInternalState(this).iterator;
|
||
|
|
var hasArg = !!arguments.length;
|
||
|
|
return new Promise(function (resolve, reject) {
|
||
|
|
var $return = getMethod(iterator, 'return');
|
||
|
|
if ($return === undefined) return resolve({ done: true, value: arg });
|
||
|
|
var result = anObject(apply($return, iterator, hasArg ? [arg] : []));
|
||
|
|
asyncFromSyncIteratorContinuation(result, resolve, reject);
|
||
|
|
});
|
||
|
|
},
|
||
|
|
'throw': function (arg) {
|
||
|
|
var iterator = getInternalState(this).iterator;
|
||
|
|
var hasArg = !!arguments.length;
|
||
|
|
return new Promise(function (resolve, reject) {
|
||
|
|
var $throw = getMethod(iterator, 'throw');
|
||
|
|
if ($throw === undefined) return reject(arg);
|
||
|
|
var result = anObject(apply($throw, iterator, hasArg ? [arg] : []));
|
||
|
|
asyncFromSyncIteratorContinuation(result, resolve, reject);
|
||
|
|
});
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
module.exports = AsyncFromSyncIterator;
|