Resolve enum class variable name to string [duplicate]

Consider, I have got the following enum class:

enum class TestEnum
{
   None = 0,
   Foo,
   Bar
};

I'd like to specify ostream operator ( << ) for this enum class, so I could write:

std::cout << "This is " << TestEnum::Foo;

and get following output This is Foo.

My question is:
Is there any place where enum "name specifiers" are stored? (i.e. for enum class TestEnum it is None, Foo and Bar) So I could write a function (or at best function template) that specifies ostream operator for this TestEnum like:

std::ostream& operator<< ( std::ostream& os, TestEnum aEnum ) {
   return std::string( aEnum.name() );
}

So far, I did it this way:

std::ostream& operator<< ( std::ostream& os, TestEnum aEnum ) {
   switch( aEnum )
   {
   case TestEnum::Foo:
       os << "Foo";
       break;
   case TestEnum::Bar:
       os << "Bar"
       break;
   }
   return os;
}

I have seen some solutions using boost library, but I would prefer not using it this time.