[Cs3] importing scoped enum names

[Mikhail Nesterenko]

CS3 students,

Last time in class I was saying that scoped enum constants are somewhat
verbose since they have to always be preceded by their enum type:

	Week::Monday  Week::Tuesday, etc

and was wondering if it was possible to import the constants into the
current scope. It turns out it is possible only in C++20 as follows:

	using Week;

Thanks,
-- 
Mikhail