#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(assert_matches)]
use std::assert_matches::debug_assert_matches;
fn main() {
    let a = Some(345);
    let b = Some(56);
    debug_assert_matches!(a, Some(_));
    debug_assert_matches!(b, Some(_));
    debug_assert_matches!(a, Some(345));
    debug_assert_matches!(a, Some(345) | None);
    debug_assert_matches!(a, Some(x) if x > 100);
}