RFR: 8314488: Compiling the JDK with C++17

[Kim Barrett]

On Thu, 26 Jun 2025 02:01:55 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

> I'm hijacking the PR mechanism as a way to discuss new C++17 features that can
> be more easily structured and captured than bare email. Once discussion
> settles down I'll turn the results into HotSpot Style Guide changes. I don't
> intend to integrate any version of this document to the OpenJDK repository.

Withdrawing this discussion PR, in preparation for the real PR to use C++17 for building, with an update
to the HotSpot Style Guide for C++17 feature usage.

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PR Comment: https://git.openjdk.org/jdk/pull/25992#issuecomment-3210870612