#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(range_bounds_is_empty)]
use std::ops::RangeBounds;
fn main() {
    assert!(! (3..).is_empty());
    assert!(! (..2).is_empty());
    assert!(! RangeBounds::is_empty(& (3..5)));
    assert!(RangeBounds::is_empty(& (3..3)));
    assert!(RangeBounds::is_empty(& (3..2)));
}