RFR: 8349525: RBTree: provide leftmost, rightmost, and a simple way to print trees

[Thomas Stuefe]

On Thu, 6 Feb 2025 08:06:04 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

> For things I currently work on (compilation memory statistic), I need this functionality.
> 
> Changes:
> 
> - added leftmost() and rightmost() (pretty self-explanatory)
> - added print_on(outputStream*) (likewise)
> - const correctness
> - other minor cleanups
> - gtests for all added functions

Ping @caspernorrbin @jdksjolen - I'd appreciate it if we could have this before the currently open intrusive tree rework, since I can then use it for an RFR that is almost finished

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PR Comment: https://git.openjdk.org/jdk/pull/23486#issuecomment-2639775689