bug.rs

bug.rs

use std::io::BufferedReader;
use std::io::File;

pub struct Data {
  content: Box<Iterator<String>>
}

impl Iterator<String> for Data {
  fn next(&mut self) -> Option<String> {
    self.content.next()
  }
}

fn new_data(file_name: &str) -> Data {
  let path = Path::new(file_name);
  let file = File::open(&path);
  let mut reader = BufferedReader::new(file);
  Data { content: box reader.lines().map(|str| str.unwrap()) }
}

fn main() {
  let mut data = new_data("prelude.ob");
  println!("{}", data.next())
}

I am using rustc 0.12.0-pre-nightly (5ebf4813a 2014-07-29 21:16:50 +0000)