cxx-demo 0.0.4

//! [https://github.com/dtolnay/cxx#example](https://github.com/dtolnay/cxx#example)

#[cxx::bridge(namespace = org::example)]
pub mod ffi {
    struct SharedThing {
        z: i32,
        y: Box<ThingR>,
        x: UniquePtr<ThingC>,
    }

    extern "C" {
        include!("cxx-demo/include/demo.h");

        type ThingC;
        fn make_demo(appname: &str) -> UniquePtr<ThingC>;
        fn get_name(thing: &ThingC) -> &CxxString;
        fn do_thing(state: SharedThing);
    }

    extern "Rust" {
        type ThingR;
        fn print_r(r: &ThingR);
    }
}

pub struct ThingR(usize);

fn print_r(r: &ThingR) {
    println!("called back with r={}", r.0);
}