[libcxx-commits] [libcxx] [libc++][RFC] Only include what is required by-version in the umbrella headers (PR #83740)

[Mark de Wever via libcxx-commits]

https://github.com/mordante commented:

As mentioned earlier I had a patch on Phab with a slightly different approach. So yes in general I like the idea of reducing the size of the includes.

I wonder about the approach you take; your examples only show how to handle granularized headers. I wonder what do you propose for non-granularized headers?

For example, `<ostream>` includes `<print>` the `<print>` header has been introduced in C++23. This header has some includes not used in `<ostream>`.

Do you propose to keep the `<ostream>` header unchanged or do you want to guard the include of `<print>` with C++23?

https://github.com/llvm/llvm-project/pull/83740