enum to string in modern C++11 / C++14 / C++17 and future C++20

Question

Contrary to all other similar questions, this question is about using the new C++ features.

• 2008 c Is there a simple way to convert C++ enum to string?
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Answer 1

What about a simple streaming overload? You still have to maintain the mapping if you don't want to do some macro magic, but I find it cleaner than your original solution.

#include   // for std::uint_fast8_t
#include 
#include 
#include 

enum class MyEnum : std::uint_fast8_t {
   AAA,
   BBB,
   CCC,
};

std::ostream& operator<<(std::ostream& str, MyEnum type)
{
    switch(type)
    {
    case MyEnum::AAA: str << "AAA"; break;
    case MyEnum::BBB: str << "BBB"; break;
    case MyEnum::CCC: str << "CCC"; break;
    default: break;
    }
    return str;
}

int main()
{
   std::cout << MyEnum::AAA <<'\n';
}