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Hi Glavo,
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<div>There was some discussion about the reasons for previewing on the spec-experts list: <a href="https://mail.openjdk.org/pipermail/amber-spec-experts/2025-April/004254.html">https://mail.openjdk.org/pipermail/amber-spec-experts/2025-April/004254.html</a>
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<div>The basic point is that this JEP overlaps with forthcoming features in Valhalla; so we’re being cautious to make sure we don’t have to undo something that crops up from Valhalla.</div>
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<div>Kind request in the meantime: Please try this feature out in anger, and report back what you found (good and bad). We need more feedback from the community on preview features like this one :-)</div>
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<div>Thanks,</div>
<div>Gavin<br id="lineBreakAtBeginningOfMessage">
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<div>On 14 Apr 2025, at 22:54, Glavo <zjx001202@gmail.com> wrote:</div>
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<div dir="ltr">Hi,
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<div>It looks like it has not changed since the original version (JEP 488).</div>
<div>Why does it need a third preview? This makes it not production-ready in JDK 25.</div>
<div>Is there some hidden danger that I'm not aware of that makes people hesitant about it?</div>
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<div>Glavo</div>
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<div dir="ltr" class="gmail_attr">On Tue, Apr 15, 2025 at 4:17 AM Mark Reinhold <<a href="mailto:mark.reinhold@oracle.com">mark.reinhold@oracle.com</a>> wrote:<br>
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<a href="https://openjdk.org/jeps/507" rel="noreferrer" target="_blank">https://openjdk.org/jeps/507</a><br>
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Summary: Enhance pattern matching by allowing primitive types in all<br>
pattern contexts, and extend instanceof and switch to work with all<br>
primitive types. This is a preview language feature.<br>
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- Mark</blockquote>
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