For following code:
class A<T> {
T[] asArray {}..
}
A<String> st;
String[] arr = st.asArray();
I wasn't expecting an erasure cast at the call site for this but seems like
I was wrong and erasure cast seems right here otherwise you cannot
guarantee that arr[0] which won't have a cast to return String.
We should be able to repro this in jsinterop.base; will take a look.
On Sun, Jul 23, 2017 at 8:18 PM, Colin Alworth <[email protected]> wrote:
> Using GWT 2.8.1, I'm trying to iterate through items found via a query
> selector:
>
> Arrays.asList(document.querySelectorAll("button.with-some-class").asArray
> ()).forEach(
> item -> doSomething(item)
> );
>
> Unfortunately, this seems to always fail - querySelectorAll returns a
> NodeList<Element>, and while asArray() seems to specify Js.uncheckedCast,
> the resulting generated code is
>
> $forEach_1(new Arrays$ArrayList(*castToJsArray*(($clinit_DomGlobal() ,
> document_0).querySelectorAll('button.with-some-class'))), new
> SampleClass$lambda$0$Type);
>
> Predictable, the bolded castToJsArray causes an exception at runtime,
> since a NodeList isn't actually a JS Array at all.
>
> Is there a correct way to do this, or perhaps a nicer way to iterate
> through NodeLists?
>
> I assume this should be a bug filed against jsinterop-base, but am not
> seeing a repo for it, or is this a bug in GWT itself?
>
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