REshuffled and removed extraneous if-statement after disucssion.

           out < static_cast<UnitType>(std::numeric_limits<T>::lowest())) {

            throw std::overflow_error("unit conversion overflows the type");

        }

        if constexpr(!std::is_integral_v<T>) {

            return static_cast<T>(out);

        } else {

            // If the input is an integral value: check so that it doesn't have decimals after applying the unit

        if constexpr(std::is_integral_v<T>) {

            // If the input is an integral value: check so that it doesn't have decimals after applying the unit

            if(out != static_cast<T>(out)) {

                throw LogicError("Cannot use integer value with non-integer internal unit; the combination " +

                                 std::to_string(inp) + " " + str + " is invalid.");

            }

            return static_cast<T>(out);

            }

        } else {

            return static_cast<T>(out);

        }

    }