open a file by match or closure

open_file.rs

use core::panic;
use std::fs::File;
use std::io::ErrorKind;

fn main(){
    let path = "a.txt";
    let f = File::open(path);
    let f = match f {
        Ok(file) => file,
        Err(error) => match error.kind() {
            ErrorKind::NotFound => match File::create(path) {
                Ok(new_file) => new_file,
                Err(error) => panic!("create file fail: {}", error),
            },
            other_error => panic!("open file fail: {:?}", other_error),
        },
    };
    println!("{:?}", f);


    let f = File::open(path).unwrap_or_else(|error| {
        if error.kind() == ErrorKind::NotFound {
            File::create(path).unwrap_or_else(|error| {
                panic!("create file fail: {}", error);
            })
        } else {
            panic!("open file fail: {}", error);
        }
    });
    println!("{:?}", f);

}

ref https://doc.rust-lang.org/book/ch09-02-recoverable-errors-with-result.html