An example using structs from outside the "ffi" module about cxx HOT 4 CLOSED

I don't plan to support this. You need to either define the struct inside the ffi bridge to share its fields, or define it outside and treat it as an opaque Rust type with accessors for whichever fields the other language would require access to.

pub struct NamedPoint {
    name: String,
    x: i32,
    y: i32,
}

#[cxx::bridge]
mod ffi {
    extern "Rust" {
        type NamedPoint;
        fn named_point_x(pt: &NamedPoint) -> i32;
        fn named_point_y(pt: &NamedPoint) -> i32;
    }
}

fn named_point_x(pt: &NamedPoint) -> i32 { pt.x }
fn named_point_y(pt: &NamedPoint) -> i32 { pt.y }

from cxx.

OK. I was only asking how to do it, not insisting on a solution. would your example work with this function?

fn named_point_name(pt: &NamedPoint) -> String;

that's the case I'm interested in.

from cxx.

Yes that would work exactly as you wrote it. I left it out because you left out pub on name at the top.

from cxx.

My mistake, thanks. FWIW, an example showing this use case would be helpful, imho.

Thanks for writing this library. I'll probably have to wait until March to start using it, but it looks good. I would only need support for Vec to make things pretty smooth.

from cxx.