[Bug c++/123642] [reflection] error in case of splice with reflection of an anonymous union member

[valentin.yukhymenko at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123642

--- Comment #3 from Valentyn Yukhymenko <valentin.yukhymenko at gmail dot com> ---
Second version of my patch, addressing code review comments from Marek + adding
Changelog:

https://gcc.gnu.org/pipermail/gcc-patches/2026-February/708927.html