#include <iostream>
#include <type_traits>
template<class Head>
void print_args(std::ostream& s, Head&& head) {
s << std::forward<Head>(head);
}
template<class Head, class... Tail>
void print_args(std::ostream& s, Head&& head, Tail&&... tail) {
if (std::is_same<Head, uint8_t>::value)
s << static_cast<int>(head) << ","; // cast uint8_t so that the value of 1 or 0 can be displayed correctly in console
else
s << std::forward<Head>(head) << ",";
print_args(s, std::forward<Tail>(tail)...);
}
template<class... Args>
void print_args(Args&&... args) {
print_args(std::cout, std::forward<Args>(args)...);
}
int main()
{
uint8_t val = 1;
print_args(std::string("hello"), val); // error: invalid static_cast from type 'std::basic_string<char>' to type 'int'
print_args("hello", val); // error: invalid static_cast from type 'const char [6]' to type 'int'
}
Question> I need to cast uint_8 to int so the value can be displayed correctly in console. However, the above code has build issue for either std::string or const char*.
What is the fix for the function?
Aucun commentaire:
Enregistrer un commentaire