[JEP-305] Inefficient compilation of Pattern Matching for instanceof
mandrikov at gmail.com
Mon Jan 20 14:39:20 UTC 2020
On Sat, Jan 18, 2020 at 3:41 PM Remi Forax <forax at univ-mlv.fr> wrote:
> you should log a bug against javac, clearly the generated bytecode should
> be cleaned up.
> But it's too late for Java 14
Indeed too late for 14. Hope it can be addressed in 15 or at least before
end of preview.
BTW I left "fix version" field empty, but maybe it should be set to
> so you will need to workaround that in JavaCoCo.
> Given that it's still a preview feature, the workaround should not stay
As you probably know, from bytecode quite tricky to detect if something was
present in source code or was added by compiler.
> By the way, what is the policy for supporting preview features (classfile
> minor version tagged with 65535) for JaCoCo ?
We do changes to support preview features, but only to verify that we can
support them when they become standard.
One and the only one so far example - is changes that we made for records (
And if records will change in 15, then it is ok for us to change what was
done for preview of 14.
>From the above not even sure that investigation of possibility to do
workaround for JEP-305 is worth the efforts.
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