The tracking issue for this feature is: #34511.

The universal_impl_trait feature extends the conservative_impl_trait feature allowing the impl Trait syntax in arguments (universal quantification).

#![feature(universal_impl_trait)]
use std::ops::Not;

fn any_zero(values: impl IntoIterator<Item = i32>) -> bool {
    for val in values { if val == 0 { return true; } }
    false
}

fn main() {
    let test1 = -5..;
    let test2 = vec![1, 8, 42, -87, 60];
    assert!(any_zero(test1));
    assert!(bool::not(any_zero(test2)));
}