Assune tuple suld be output in a comma-separated form:

template <typename TupleT, std::size_t... Is>
void printTupleImp(const TupleT& tp, std::index_sequence<Is...>) {
    size_t index = 0;

    std::cout << "(";
    ( ((index++ > 0 ? (std::cout << ", ", true) : true), 
       void(std::cout << std::get<Is>(tp))), ... );
    std::cout << ")";
}

template <typename TupleT, std::size_t TupSize = std::tuple_size_v<TupleT>>
void printTuple(const TupleT& tp) {
    printTupleImp(tp, std::make_index_sequence<TupSize>{});
}

int main() {
    std::tuple tp { 10, 20, "hello"};
    printTuple(tp);
}

It looks like optimization of foldexpression went quite efficiently Compiler Explorer.

Isthere a way to do the same using solely {fmt} and not doing it by outputing to an ostream first, like here?