> All C++20 features are now available under the |/std:c++latest|
> switch. While MSVC’s implementation of the C++20 standards (as
> currently published by ISO) is feature complete, some key C++20
> library features are expected to be amended by upcoming Defect Reports
> (ISO C++20 bug fixes) that may change them in an ABI-incompatible way.
> Please see Microsoft/STL Issue #1814
> <
https://github.com/microsoft/STL/issues/1814> for more details.
>
> * C++20 immediate functions & constinit support added in 16.10
> * The final pieces of |<chrono>|: new clocks, leap seconds, time
> zones, and parsing
> * Implementation of |<format>| for text formating
>
<
https://docs.microsoft.com/en-us/visualstudio/releases/2019/release-notes#16.10.0>