#![allow(dead_code, deprecated, unused_variables, unused_mut)]
fn main() {
    let f: fn(i32) -> i32 = |x| x;
    let g: fn(i32) -> i32 = |x| x + 0;
    let h: fn(u32) -> u32 = |x| x + 0;
    dbg!(std::ptr::fn_addr_eq(f, g), std::ptr::fn_addr_eq(f, h));
}