Passing seq or array to cpp function that takes iterators.

[pablocael]

Hi there,

Im trying to export the std::nth_element function from cpp to nim by creating a 
wrapper function like this:
    
    
    {.emit:"""
    
    #include <algorithm>
    
    void nth_element(float* arr, int size, int n) {
      std::nth_element(arr, arr + n, arr + size);
    }
    """.}
    
    proc nth_element(array: ref object, size: int, n: int) {.importcpp: 
"nth_element(@)".}
    
    
    proc main() =
        var arr = newSeq[float](10)
        for i in 0 ..< arr.len:
            arr[i] = i.float32
        nth_element(arr, arr.len, 5)
        echo arr, " ", arr[5]
    
    main()
    
    
    Run

However I have difficulty in understanding how to pass pointers between cpp and 
nim. In this case I want to pass an array buffer to the nth_element function by 
using any available strategy (in the example I have tried using pointers but I 
did not succeeded).

Is there a way of doing that?

Thanks in advance