gistfile1.txt

pub fn load_level(&mut self, filename: ~str) -> ~[~Entity] {
  let level_json_str = File::open(&Path::new(filename)).read_to_end();
  let level_json = match json::from_str(level_json_str.to_str()) {
    Ok(json) => json,
    Err(e) => fail!("Failed to load level.")
  };

  let root_json = match level_json { json::Object(~o) => Some(o), _ => None};
  let entities_json = root_json.as_ref().map_or(~[], |&j|
    j.find(&~"entities").as_ref().map_or(~[], |&e| match e { json::List(l) => l, _ => ~[]})
  );
  
  // more stuff
}


Gives me:

resource_store.rs:42:70: 42:83 error: mismatched types: expected `&extra::json::
Json` but found an enum or structure pattern
resource_store.rs:42             j.find(&~"entities").as_ref().map_or(~[], |&e|
match e { json::List(l) => l, _ => ~[]})