Parsing comments on function parameters? 

I can see that the parameters for functions have a comment field but it seems to always be null? 🤔 
Is there a way for them to be parsed and how should the comments be placed?

I tried:
```cpp
double my_func(double /*comments*/ myParam) { }
```

```cpp
double my_func( /*comments*/ double myParam) { }
```

```cpp
double my_func(double myParam /*comments*/) { }
```

