[libcxx-commits] [libcxx] [libc++] Implement `views::join_with` (PR #65536)

[Jakub Mazurkiewicz via libcxx-commits]

JMazurkiewicz wrote:

Thank you @huixie90 for your review. I've pushed commits addressing your latest comments (https://github.com/llvm/llvm-project/pull/65536/commits/95ea7bc0eb21a9348eda112149acff13797fdb51, https://github.com/llvm/llvm-project/pull/65536/commits/8ab29fbe9f62107ea8cbdc8cb9ae4cc3707a4954, https://github.com/llvm/llvm-project/pull/65536/commits/7198928a298d5db80561238a87e01d902719b910), and changing three more things:

* https://github.com/llvm/llvm-project/pull/65536/commits/6cb18ac88583c88f73009c3dcec133497da651eb - This commit fixes problem with friendship (similar to [this one](https://github.com/llvm/llvm-project/pull/65536#discussion_r1897405679)) in the test suite.
* https://github.com/llvm/llvm-project/pull/65536/commits/37525dbfdfe02c7e0d7518c03e4d32917d43d6bf - This commit fixes truncation warnings when testing MSVC standard library (so it's easier for them to update their llvm submodule).
* https://github.com/llvm/llvm-project/pull/65536/commits/de46d6368caba59ee4f13b807ab483ca02365ddd - LWG-4074 removed `compatible-joinable-ranges`, this commit updates synopsis.

https://github.com/llvm/llvm-project/pull/65536