Fun With Macros

gistfile1.rs

pub struct SetupRequest {
    byte_order: u8,
    protocol_major_version: u16,
    protocol_minor_version: u16,
    authorization_protocol_name: ~[u8],
    authorization_protocol_data: ~[u8],
}
struct_io!{
    SetupRequest;
    copy byte_order;
    .. 1;
    copy protocol_major_version;
    copy protocol_minor_version;
    let authorization_protocol_name_len: u16 = self.authorization_protocol_name.len();
    let authorization_protocol_data_len: u16 = self.authorization_protocol_data.len();
    .. 2;
    for (authorization_protocol_name_len as uint) copy authorization_protocol_name;
    .. -(authorization_protocol_name_len as uint) & 3;
    for (authorization_protocol_data_len as uint) copy authorization_protocol_data;
    .. -(authorization_protocol_data_len as uint) & 3;
}