Class template argument deduction not working - cpp17

```
#include <iostream>
#include <vector>

template<typename T>
class Data {
public:
	Data(const T &t) {
	}
};
Data(const char *) -> Data<std::string> ;
Data(int)->Data<long> ;
int main() {
	Data d1{5};
}
```

the above code is not compiling, only if I change `Data d1{5} ;` to `Data<int> d1{5} ;` it is working. 