#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::ascii;
fn main() {
    let escaped = ascii::escape_default(b'0').next().unwrap();
    assert_eq!(b'0', escaped);
    let mut escaped = ascii::escape_default(b'\t');
    assert_eq!(b'\\', escaped.next().unwrap());
    assert_eq!(b't', escaped.next().unwrap());
    let mut escaped = ascii::escape_default(b'\r');
    assert_eq!(b'\\', escaped.next().unwrap());
    assert_eq!(b'r', escaped.next().unwrap());
    let mut escaped = ascii::escape_default(b'\n');
    assert_eq!(b'\\', escaped.next().unwrap());
    assert_eq!(b'n', escaped.next().unwrap());
    let mut escaped = ascii::escape_default(b'\'');
    assert_eq!(b'\\', escaped.next().unwrap());
    assert_eq!(b'\'', escaped.next().unwrap());
    let mut escaped = ascii::escape_default(b'"');
    assert_eq!(b'\\', escaped.next().unwrap());
    assert_eq!(b'"', escaped.next().unwrap());
    let mut escaped = ascii::escape_default(b'\\');
    assert_eq!(b'\\', escaped.next().unwrap());
    assert_eq!(b'\\', escaped.next().unwrap());
    let mut escaped = ascii::escape_default(b'\x9d');
    assert_eq!(b'\\', escaped.next().unwrap());
    assert_eq!(b'x', escaped.next().unwrap());
    assert_eq!(b'9', escaped.next().unwrap());
    assert_eq!(b'd', escaped.next().unwrap());
}