我试图编写一个类，该类将用容器具有的类型的随机数填充容器：
template<typename random_type>
class rand_helper {
private:
std::mt19937 random_engine;
std::uniform_int_distribution<int> int_dist;
std::uniform_real_distribution<double> real_dist;
public:
rand_helper() = delete;
rand_helper(random_type left_b, random_type right_b);
random_type operator()();
};
template<typename random_type>
rand_helper<random_type>::rand_helper(const random_type left_b, const random_type right_b) :random_engine{ std::random_device{}()} {
if constexpr (std::is_same_v<random_type, double>)
real_dist(left_b, right_b );
else
int_dist( left_b, right_b );
}
template<typename random_type>
random_type rand_helper<random_type>::operator()() {
if constexpr (std::is_same_v<random_type, double>)
return real_dist(random_engine);
else
return int_dist(random_engine);
}
但是这里某处发生错误，因为当我调用 std::generate 时，我会收到很多错误：
template<typename T,typename vec_type = typename T::value_type>
void fill_contain(T& container,vec_type left_b=vec_type(0), vec_type right_b= vec_type(100)) { …