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

[Kim Barrett]

On Fri, 27 Jun 2025 09:08:29 GMT, Johan Sjölen <jsjolen at openjdk.org> wrote:

> Are we supposed to put our comments in this PR :-)?

Yes. That's kind of the point of using a PR.

> `constexpr if` statements would be nice to have. Seldom used, but the alternative is even more 'magical looking'.

See item 10. Compile-time If, which is currently in the permitted block.

> From Julian's linked PR, apparently AIX's C++ compiler is capable of compiling C++17. Do we have any other "obscure" platform which the community is interested in supporting?

None that I know about. That's part of the point of asking the question about whether we should throw the switch
at all and start building with and using C++17.

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PR Comment: https://git.openjdk.org/jdk/pull/25992#issuecomment-3013193894
PR Comment: https://git.openjdk.org/jdk/pull/25992#issuecomment-3013198408