closure_to_fn.rs

use std::any::TypeId;
use std::any::Any;

fn wrap<F: Fn()+Any>(closure: F) -> extern "C" fn() {
    extern "C" fn wrapped<F: Any>() -> () {
        println!("Haven't written this yet! TypeId: {:?}", TypeId::of::<F>());
    }
    println!("Storing closure {:?}", TypeId::of::<F>());
    wrapped::<F>
}

fn main() {
    wrap(|| println!("Hi"));
    wrap(|| println!("Bye"));
}