Hi, Author here - I went to lambdas because I got some compilation issues... because some stupid mistakes the code with std::apply(printImpl<Args...>, tp) didn't compile...

But now I see the issue and it's improved. So the version:

template <typename... Args> void printTupleApplyFn(const std::tuple<Args...>& tp) { std::cout << "("; std::apply(printImpl<Args...>, tp); // << std::cout << ")"; }

is fine and probably the easiest