Function lex_less_impl

include/cute/int_tuple.hpp:755–768

template <size_t I, class TupleA, class TupleB>
CUTE_HOST_DEVICE constexpr
auto
lex_less_impl(TupleA const& a, TupleB const& b)
{
  if constexpr (I == tuple_size<TupleB>::value) {
    return cute::false_type{};    // Terminal: TupleB is exhausted
  } else if constexpr (I == tuple_size<TupleA>::value) {
    return cute::true_type{};     // Terminal: TupleA is exhausted, TupleB is not exhausted
  } else {
    return lex_less(get<I>(a), get<I>(b)) || (get<I>(a) == get<I>(b) && lex_less_impl<I+1>(a,b));
  }

  CUTE_GCC_UNREACHABLE;
}

template <size_t I, class TupleA, class TupleB>
CUTE_HOST_DEVICE constexpr