On Fri, 3 Jun 2022 15:09:24 GMT, Jorn Vernee <jver...@openjdk.org> wrote:
>> Claes Redestad has updated the pull request incrementally with one
>> additional commit since the last revision:
>>
>> Review comments, eagerly convert sooner in tryFinally
>
> src/java.base/share/classes/java/lang/invoke/MethodHandles.java line 5266:
>
>> 5264: */
>> 5265: public static MethodHandle dropArguments(MethodHandle target, int
>> pos, List<Class<?>> valueTypes) {
>> 5266: return dropArguments(target, pos, valueTypes.toArray(new
>> Class<?>[0]), false);
>
> A bit unfortunate that we can't trust this `toArray` to do a copy. I was
> going to suggest Stream, but it has the same issue (someone might have a
> custom stream implementation).
>
> I do think a manual copy of the array is possible by having a loop though:
> Suggestion:
>
> Class<?>[] ptypes = new Class<?>[valueTypes.size()];
> for (int i = 0; i < ptypes.length; i++) {
> ptypes[i] = valueTypes.get(i);
> }
> return dropArguments(target, pos, ptypes, false);
>
>
> (or, maybe extract such a loop to a helper method for clarity).
The same could be done for the public `dropArgumentsToMatch` I think.
-------------
PR: https://git.openjdk.java.net/jdk/pull/8923
