RFR: 8366178: Implement JEP 526: Lazy Constants (Second Preview) [v28]

[Jorn Vernee]

On Mon, 17 Nov 2025 11:38:03 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:
> 
>   Fix typo

test/jdk/java/lang/LazyConstant/LazyConstantTest.java line 234:

> 232:             return new Lazy<>(LazyConstant.of(computingFunction));
> 233:         }
> 234:     }

This appears to be unused?

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PR Review Comment: https://git.openjdk.org/jdk/pull/27605#discussion_r2534822362