This is part of the modules mess in the first place. Modules were implemented in MSVC and clang, and neither agreed with the others implementation. Also if MSV

This is part of the modules mess in the first place. Modules were implemented in MSVC and clang, and neither agreed with the others implementation. Also if MSVC came along with an "extension" to c++, I can only imagine the uproar suggesting that this is now step 2 of EEE.