c++ standard library header not recognized

Question

I'm working on a multithreaded project in c++ and am trying to use a semaphore, from what I read in the documentation c++ has a semaphore, but when I try to include the header

#include <semaphore>

It does not autocomplete and I get a compiler error saying the header file is not recognized.
According to the documentation,

This header is part of the thread support library.

Does this mean I would need to add some prefix to the #include? Or include some other dependant header? I can't figure out why this won't work and I can't find anything about this anywhere, any help would be appreciated.

I'm on a temporary machine and just installed visual studio on it a couple of days ago, so everything should be up to date.

It is c++20 feature, i don`t know if there are compilers that support it, you probably need to to wait some time — Olexy
– Olexy, Commented May 29, 2020 at 16:27
If you look carefully at the documentation page you'll see that the whole thing is marked (since C++20). This standard hasn't been finalized yet so it shouldn't be surprising that your compiler hasn't implemented some of the features. — user9254539
– user9254539, Commented May 29, 2020 at 16:28
Oh I see, I had read since and assumed it was already a feature — Jay
– Jay, Commented May 29, 2020 at 16:36

cigien · Accepted Answer · 2020-05-29 16:23:18Z

4

As can be seen here, none of the listed compilers have currently implemented this c++20 feature.

answered May 29, 2020 at 16:23

cigien

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