RFR: JDK-8280168: Add Objects.toIdentityString [v7]

[Rémi Forax]

On Mon, 24 Jan 2022 21:31:37 GMT, Joe Darcy <darcy at openjdk.org> wrote:

>> While it is strongly recommend to not use the default toString for a class, at times it is the least-bad alternative. When that alternative needs to be used, it would be helpful to have the implementation already available, such as in Objects.toDefaultString(). This method is analagous to System.identityHashCode.
>> 
>> Please also review the CSR: https://bugs.openjdk.java.net/browse/JDK-8280184
>
> Joe Darcy has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains eight additional commits since the last revision:
> 
>  - Respond to review feedback.
>  - Merge branch 'master' into JDK-8280168
>  - Merge branch 'master' into JDK-8280168
>  - Appease jcheck.
>  - Add toIdentityString
>  - Respond to review feedback to augment test.
>  - Respond to review feedback.
>  - JDK-8280168 Add Objects.toDefaultString

toIdentityString is a better name than toDefaultString.

It's fine for me but given that "identity" has a slightly different meaning in the context of Valhalla that in System.identityHashCode(), it may be good to ask Brian about that name.

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PR: https://git.openjdk.java.net/jdk/pull/7139