rust/tests/ui/impl-trait/universal_in_adt_in_parameters.rs

// run-pass

use std::fmt::Display;

fn check_display_eq(iter: &Vec<impl Display>) {
    let mut collected = String::new();
    for it in iter {
        let disp = format!("{} ", it);
        collected.push_str(&disp);
    }
    assert_eq!("0 3 27 823 4891 1 0", collected.trim());
}

fn main() {
    let i32_list_vec = vec![0i32, 3, 27, 823, 4891, 1, 0];
    let u32_list_vec = vec![0u32, 3, 27, 823, 4891, 1, 0];
    let str_list_vec = vec!["0", "3", "27", "823", "4891", "1", "0"];

    check_display_eq(&i32_list_vec);
    check_display_eq(&u32_list_vec);
    check_display_eq(&str_list_vec);
}