Derive Macro PacketLength 

#[derive(PacketLength)]
{
    // Attributes available to this derive:
    #[length]
}

This derive macro will implement the BanchoPacketLength trait for the struct.

Usage

use bancho_packets::{PacketLength};

#[derive(Debug, Clone, PacketLength)]
/// [`MatchData`] is the data of bancho client multiplayer game room.
pub struct MatchData {
    pub match_id: i32,
    pub in_progress: bool,
    pub match_type: i8,
    pub play_mods: u32,
    pub match_name: String,
    #[length(self.password.as_ref().map(|pw| pw.packet_len()).unwrap_or(2))]
    pub password: Option<String>,
    pub beatmap_name: String,
    pub beatmap_id: i32,
    pub beatmap_md5: String,
    pub slot_status: Vec<u8>,
    pub slot_teams: Vec<u8>,
    pub slot_players: Vec<i32>,
    pub host_player_id: i32,
    pub match_game_mode: u8,
    pub win_condition: u8,
    pub team_type: u8,
    pub freemods: bool,
    pub player_mods: Vec<i32>,
    pub match_seed: i32,
}