template GetString(T) if (is(T == int) || is(T == float) || ...) { enum string GetString = T.stringof; }
Current idiomatic D way to handle both built-in types and symbols looks like this:
template Hello(T...) if (T.length == 1) { static if (is(T[0])) // ... else // ... }I actually don't understand why it accepts literals as those are not symbols and, for example, you can't attach UDA to literal.