#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(ascii_char, ascii_char_variants)]
use std::ascii;
fn main() {
    let zero = ascii::Char::Digit0;
    let tab = ascii::Char::CharacterTabulation;
    let cr = ascii::Char::CarriageReturn;
    let lf = ascii::Char::LineFeed;
    let apostrophe = ascii::Char::Apostrophe;
    let double_quote = ascii::Char::QuotationMark;
    let backslash = ascii::Char::ReverseSolidus;
    assert_eq!("0", zero.escape_ascii().to_string());
    assert_eq!("\\t", tab.escape_ascii().to_string());
    assert_eq!("\\r", cr.escape_ascii().to_string());
    assert_eq!("\\n", lf.escape_ascii().to_string());
    assert_eq!("\\'", apostrophe.escape_ascii().to_string());
    assert_eq!("\\\"", double_quote.escape_ascii().to_string());
    assert_eq!("\\\\", backslash.escape_ascii().to_string());
}