src/doc/book/listings/ch09-error-handling/no-listing-03-closures/src/main.rs

   1 use std::fs::File;
   2 use std::io::ErrorKind;
   3
   4 fn main() {
   5     let f = File::open("hello.txt").unwrap_or_else(|error| {
   6         if error.kind() == ErrorKind::NotFound {
   7             File::create("hello.txt").unwrap_or_else(|error| {
   8                 panic!("Problem creating the file: {:?}", error);
   9             })
  10         } else {
  11             panic!("Problem opening the file: {:?}", error);
  12         }
  13     });
  14 }