RFR: 8372948: Store end positions directly in JCTree [v6]

[Maurizio Cimadamore]

On Mon, 26 Jan 2026 16:11:26 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

>> `JavacParser` is still only recording end positions for the trees where it calls `storeEnd`, so the same kinds of trees have end positions recorded in the new world. I think that potentially `JavacParser` could start recording end positions for all trees, and then this switch could be removed. I will investigate that more. If it works out, I wonder if it might be better as a separate follow-up change, to keep the initial refactoring to remove the end pos table as behaviour preserving as possible. What do you think?
>
> I think it's ok to start simple and refine as we go. As part of this change it would be perhaps helpful to at least simplify the method so that "unreachable cases" are removed?

(longer term, (as discussed offline with @lahodaj ) I think it would be nice to have end positions set up correctly by parser for all trees, since now it doesn't cost extra to do so)

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PR Review Comment: https://git.openjdk.org/jdk/pull/28610#discussion_r2728321043