rust-cpp-callback.rs

use cpp::cpp;
use cpp::cpp_class;

cpp!{{
    #include <iostream>
    class Test {
    public:
       void method() {
            std::cout << "method called" << std::endl;
            methodImpl();
       }
    protected:
       virtual void methodImpl() {
            std::cout << "methodImpl called" << std::endl;
       }
    };
}}

cpp!{{
    class TestImpl : public Test {
    protected:
       virtual void methodImpl() override {
            std::cout << "methodImpl override called" << std::endl;
            rust!(My_Rust_MethodImpl [] {
                println!("hey there!");
            });
       }
    };
}}

cpp_class!(pub unsafe struct TestImpl as "TestImpl");
impl TestImpl {
    fn new() -> Self {
        unsafe { cpp!([] -> TestImpl as "TestImpl" { return TestImpl(); }) }
    }

    fn run(&self) {
        unsafe {
            cpp!([self as "TestImpl*"] {
                self->method();
            })
        }
    }
}

fn main() {
    let t = TestImpl::new();
    t.run();
}