batch_await

在NSArray *co_batch_await(NSArray * awaitableList)函数中为什么会将错误替换进result？

我的场景是使用batch_await调用好几个接口，然后拿到结果刷新页面，但是如果其中一个接口调用失败我将调用reject
NSError *err = [NSError errorWithDomain:@"data error" code:-1 userInfo:nil];
[promise reject:err];
这样，而调用batch_await之后，由于
NSError *error = co_getError();
if (error) {
[result replaceObjectAtIndex:i withObject:error];
}
前面数组中得到的结果也是有error，我在结果取值result[1]的时候并没有得到想要的结果，而是error，这样再走下面的逻辑程序就会有问题，为什么不能将错误放入co_getError中，
想await中那样，最后取得错误另外处理，否则每个result[1], result[2]，我都需要判断返回的结果是否有错，再走正常逻辑
NSArray *recommentArray = result[1];
if (![recommentArray isKindOfClass:[NSError class]]) {
goodsObj.recommendArray = recommentArray;
}

NSMutableArray *goodsColorInfo = result[2];
if (![goodsColorInfo isKindOfClass:[NSError class]]) {
[self getHuiMaiColorAndStyleInfo:goodsColorInfo];
}
这样比较繁琐

Start by locating the NSArray *co_batch_await(NSArray *awaitableList) implementation and trace how co_getError() is handled after each awaited item. Reproduce the reported case with one rejected promise and several successful results. Done means the chosen error behavior is agreed, implemented consistently, and covered by a regression test.

Written by the indexing model from the issue text.