gistfile1.txt

fn read_struct<R: io::Reader, T>(reader: R, obj: &mut T) {
    let size: uint = sys::size_of::<T>();
    unsafe {
        let borrowed_ptr: &u8 = cast::reinterpret_cast(&obj);
        let ptr: *u8 = ptr::to_unsafe_ptr(borrowed_ptr);
        do vec::raw::buf_as_slice(ptr, size) |buf: &[u8]| {
            let mut_buf: &[mut u8] = cast::reinterpret_cast(&buf);
            let ret = reader.read(mut_buf, size);
            assert ret == size;
        }
    }
}