problem building example

[timothey-lemley-koerber]

Hello, I am new to Rust, so this maybe a stupid problem, but when I try to build your example program I get the following error:

error[E0061]: this function takes 1 argument but 0 arguments were supplied
--> src\main.rs:22:30
|
22 | handle: unsafe { LibSnap7::Cli_Create() },
| ^^^^^^^^^^^^^^^^^^^^-- an argument of type &snap7_sys::LibSnap7 is missing
|
note: method defined here
--> C:\Users\Timothey.Lemley\Documents\tooling\rust\simple\target\debug\build\snap7-sys-16ee191438d9eefb\out/bindings.rs:875:19
|
875 | pub unsafe fn Cli_Create(&self) -> S7Object {
| ^^^^^^^^^^
help: provide the argument
|
22 | handle: unsafe { LibSnap7::Cli_Create(/* &snap7_sys::LibSnap7 */) },
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~

I do not know what to do here.

[timothey-lemley-koerber]

I had to add a path to the snap7 .dll as a constant string and use that everytime I called a function. I got the program to compile and run, but it's not connecting to my PLC yet.

const PATH_TO_LIB: &str = "C:/Users/xxx/Documents/tooling/c++/snap7-full-1.4.2/snap7-full-1.4.2/build/bin/win64/snap7.dll";

impl Client {
pub fn new() -> Self {
let lib = unsafe {LibSnap7::Cli_Create(&snap7_sys::LibSnap7::new(Path::new(PATH_TO_LIB)).unwrap())} ;

[timothey-lemley-koerber]

I was able to get the connection working by adding a reference to the library in the struct implementation:

    ```

let snap = unsafe { snap7_sys::LibSnap7::new(Path::new(PATH_TO_LIB)).unwrap() };
let lib = unsafe {LibSnap7::Cli_Create(&snap)} ;
Self {
snap: snap,