<i18n dev> RFR: 8366178: Implement JEP 526: Lazy Constants (Second Preview) [v19]

[Maurizio Cimadamore]

On Fri, 17 Oct 2025 14:58:44 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.
>
> Per Minborg has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update after doc comments

src/java.base/share/classes/java/lang/LazyConstant.java line 161:

> 159:  * to a lazy constant or if there is a chain from a {@code static final} field -- via one
> 160:  * or more <em>trusted fields</em> (i.e., {@code static final} fields,
> 161:  * {@linkplain Record record} fields, lazy constants, lazy lists, lazy maps,

lazy constants and lazy lists/maps are not themselves "trusted final fields" (at least not yet), so not sure they belong here?

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PR Review Comment: https://git.openjdk.org/jdk/pull/27605#discussion_r2441086058