use std::ascii;

fn escdef_to_string(escdef: ascii::EscapeDefault) -> String {
    String::from_utf8(escdef.collect::<Vec<_>>()).unwrap()
}

fn run_exmpl() {

    let mut esc = ascii::escape_default(b'0');
    println!("{:?} - {:?}\n", esc.next(), esc.next());
    let mut esc = ascii::escape_default(b'\t');
    println!("{:?} - {:?} - {:?}\n", esc.next(), esc.next(), esc.next());


    let esc = ascii::escape_default(b'\t');
    println!("{:?}", escdef_to_string(esc));
    println!();


    fn _dbg_println(num: u8) {
        println!(
            "{:3}  0x{:02X}  {:8}  {:?}",
            num, num,
            format!("{:?}", num as char),
            escdef_to_string(ascii::escape_default(num))
        );
    }

    for num in [b'0', b'\t', b'\r', b'\n', b'\'', b'"', b'\\', b'\x9d'].iter() {
        _dbg_println(*num);
    }
    println!();
    for num in 0..0x7f {
        _dbg_println(num);
    }
    println!();
    for num in 0x80..0x9f {
        _dbg_println(num);
    }
    println!();

}

fn main() {
    run_exmpl();
}