<i18n dev> RFR: 8366178: Implement JEP 526: Lazy Constants (Second Preview)

[Kerman]

On Thu, 2 Oct 2025 10:51:08 GMT, Per Minborg <pminborg at openjdk.org> wrote:

> Implement JEP 526: Lazy Constants (Second Preview)
> 
> The lazy list/map implementations are broken out from `ImmutableCollections` to a separate class.
> 
> The old benchmarks are not moved/renamed to allow comparison with previous releases.
> 
> `java.util.Optional` is updated so that its field is annotated with `@Stable`.  This is to allow `Optional` instances to be held in lazy constants and still provide constant folding.

src/java.base/share/classes/java/util/Optional.java line 74:

> 72:      * If non-null, the value; if null, indicates no value is present
> 73:      */
> 74:     @Stable

Shouldn’t this also add a null sentinel to allow the folding of the empty case? Or is that irrelevant because empty would be the terminator of a chain.

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PR Review Comment: https://git.openjdk.org/jdk/pull/27605#discussion_r2399352909