src/doc/book/listings/ch09-error-handling/listing-09-05/src/main.rs

   1 use std::fs::File;
   2 use std::io::ErrorKind;
   3
   4 fn main() {
   5     let greeting_file_result = File::open("hello.txt");
   6
   7     let greeting_file = match greeting_file_result {
   8         Ok(file) => file,
   9         Err(error) => match error.kind() {
  10             ErrorKind::NotFound => match File::create("hello.txt") {
  11                 Ok(fc) => fc,
  12                 Err(e) => panic!("Problem creating the file: {:?}", e),
  13             },
  14             other_error => {
  15                 panic!("Problem opening the file: {:?}", other_error);
  16             }
  17         },
  18     };
  19 }