Cargo.toml

[package]
name = "foo"
version = "1.0.0"

[dependencies]
lonlat_bng = "*"

main.rs

extern crate lonlat_bng;
use lonlat_bng::convert_to_bng_threaded_vec;

fn main() {
    let lon: &mut [f64] = &mut [20000.0];
    let lat: &mut [f64] = &mut [20000.0];
    println!("{:?}", convert_to_bng_threaded_vec(lon, lat));
}