RFR: 8325671: Shenandoah: Introduce a ShenandoahGenerationType and templatize certain marking closures with it [v2]

[Kelvin Nilsen]

On Mon, 12 Feb 2024 22:25:27 GMT, Y. Srinivas Ramakrishna <ysr at openjdk.org> wrote:

>> 8325671: Shenandoah: Introduce a ShenandoahGenerationType and templatize certain marking closures with it
>
> Y. Srinivas Ramakrishna has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Missing #include of ShenandoahGenerationType (albeit satisfied transitively via other include).

Thanks for these refinements.  Look good to me.

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Marked as reviewed by kdnilsen (no project role).

PR Review: https://git.openjdk.org/jdk/pull/17815#pullrequestreview-1879190942