[lworld] RFR: 8301899: [lworld] Value class APIs should have annotation for PreviewFeature

[Mandy Chung]

On Tue, 7 Feb 2023 17:15:53 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

> Add the PreviewFeature for value objects and annotate new APIs.
> 
> Update tests to EnablePreview (all tests in test/jdk/valhalla/...)
> 
> Tier1-3 tests pass.

Marked as reviewed by mchung (Committer).

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PR: https://git.openjdk.org/valhalla/pull/823