Copy trait

gistfile1.rs

    pub fn query_and_collect<T, F, C>(&self, sql: &str, params: &[&ToSql], f: F) -> SqliteResult<C>
                                   where F: Fn(SqliteRow) -> T + Copy, // FIXME: is the Copy really necessary?
                                         C: FromIterator<T> {
        let mut statement = try!(self.prepare(sql));
        
        statement
            .query(params)
            .and_then(|rows| {
                rows
                    .map(|row| {
                        row.map(f)
                    })
                    .collect()
            })
    }