Fun with mutable readers!

fun.rs

use std::io;

pub struct A<'a, R> {
  reader: &'a R
}

pub fn init<'a, R: io::Reader>(r: &'a R) -> ~Parser<'a, R> {
  ~A {
    reader: r
  }
}

impl<'a, R: io::Reader> A<'a, R> {
  fn get() {
    let mut bytes = [0, .. 1024];
    let optnbread = self.reader.read(bytes);  // error: cannot borrow immutable dereference of & pointer as mutable
    if optnbread.is_some() {
      // blah blah blah
    }
  }
}