extern crate ggez;

use ggez::{Game, State, GameError};
use std::time::Duration;

struct MainState;

impl State for MainState
{
    fn init(&mut self) -> Result<(), GameError>
    {
        println!("init");
        Ok(())
    }
    fn update(&mut self, dt: Duration) -> Result<(), GameError>
    {
        println!("update");
        Ok(())
    }
    fn draw(&mut self) -> Result<(), GameError>
    {
        println!("draw");
        Ok(())
    }
}

pub fn main() {
    let mut g: MainState = MainState;
    let mut e: Game = Game::new(g);
    e.run();
}

extern crate ggez;

use ggez::{Game, State, GameError};
use std::time::Duration;

struct MainState
{
}

impl State for MainState
{
    fn init(&mut self) -> Result<(), GameError>
    {
        println!("init");
        Ok(())
    }
    fn update(&mut self, dt: Duration) -> Result<(), GameError>
    {
        println!("update");
        Ok(())
    }
    fn draw(&mut self) -> Result<(), GameError>
    {
        println!("draw");
        Ok(())
    }
}

pub fn main() {
    let mut g: MainState = MainState {};
    let mut e: Game = Game::new(g);
    e.run();
}

--- 
+++ 
@@ -3,9 +3,7 @@
 use ggez::{Game, State, GameError};
 use std::time::Duration;
 
-struct MainState
-{
-}
+struct MainState;
 
 impl State for MainState
 {
@@ -27,7 +25,7 @@
 }
 
 pub fn main() {
-    let mut g: MainState = MainState {};
+    let mut g: MainState = MainState;
     let mut e: Game = Game::new(g);
     e.run();
 }
Fix struct syntax for empty struct

* MainState in flappy example
