Question - Variable initialization

Variable initialization (cpp)

Hi, I'm having problems trying to catch the first assignment of a variable in a function's argument.

For instance, catching the `struct->elem` variable from `recvfrom` arg 2, and finding its first assignment whereby it is equated to `ptr`. Ultimately, I want to catch all `ptr` variables that are used in the `recvfrom` function.
```
struct->elem = ptr
recvfrom(df, struct->elem...)
```

Thanks for any help!