[libcxx-commits] [libcxx] [libc++][streams] P1759R6: Native handles and file streams (PR #76632)

[Hristo Hristov via libcxx-commits]

H-G-Hristov wrote:

@mordante I decided to do this quickly and I post it to discuss and ask questions. Please excuse my incompetence!
1. I implemented test but I am not sure these are enough but I don't have idea how to test the native handle better especially on non-POSIX (Windows).
2. I added a `native_handle` implementation function to a file `fstream.cpp` similar to what's done in `print.cpp`. The macro `#  if _LIBCPP_STD_VER >= 26` doesn't seem to be defined in C++26 mode and in general I have trouble exporting the mangled symbol and getting the tests to link. Please advise.

https://github.com/llvm/llvm-project/pull/76632