please comment the code what is wrong in my implementation of this known task
template <typename T>
T arithmetic_sum(T first) {
return first;
}
template<typename T, typename... Types>
auto arithmetic_sum(T first, Types ...others) ->decltype(first + arithmetic_sum(others...)) {
return first + arithmetic_sum(others...);
}
(GCC 4.9)
e.g. this call
auto i = arithmetic_sum(123, 123.45, 0.55l);
can't be compiled with error:
error: no matching function for call to 'arithmetic_sum(int, double, long double)'
auto i = arithmetic_sum(123, 123.45, 0.55l); ^
