如何匹配特定的 io::Error 类型？

我试图一次读入一个文件直到最后 2 个字节，并且我想捕获 EOF 错误：

use byteorder::{BigEndian, ReadBytesExt}; // 1.3.4
use std::fs::File;

fn main() {
    let filename = "/etc/hosts";
    let mut file = File::open(filename).expect("Cannot open file");
    loop {
        let binary = match file.read_u16::<BigEndian>() {
            Ok(binary) => binary,
            Err(e) => panic!("Can't read from file: {}, err {}", filename, e),
            // Can I catch the EOF error here?
        };
        println!("{:?}", binary);
    }
}

这适用于 Rust 版本 1.17.0（并且可能回到 Rust 1.0）：

let binary = match file.read_u16::<BigEndian>() {
    Err(ref e) if e.kind() == std::io::ErrorKind::UnexpectedEof => break,
    Err(e) => panic!("Can't read from file: {}, err {}", filename, e),
    Ok(binary) => binary,
};