Rusts stuff

game_menu.rs

use game_state::GameState;

mod game_state;

pub struct GameWindow {
  window: ~int,
  state: ~GameState,
}

impl GameWindow {
  pub fn new(default_state: ~GameState) -> GameWindow {
    let mut window = ~10;
    GameWindow {
      window: window,
      state: default_state,
    }
  }

  pub fn set_game_state<T: GameState>(&mut self, state: ~T) {
    //self.state = state;
  }
}

game_state.rs

pub trait GameState {
  fn update();
  fn draw();
  fn delegate_input() {}
  fn call_delegated_input() {}
}

gistfile1.rs

rustc -L../../rust-sfml/lib/ --out-dir bin src/main.rs
src/game_window.rs:24:14: 24:28 error: failed to find an implementation of trait game_state::GameState for ~game_state::GameState:Send
src/game_window.rs:24       state: ~default_state,
                                   ^~~~~~~~~~~~~~
make: *** [demo] Error 101

main.rs

extern crate native;

use menu::{Menu};
use game_state::{GameState};
use std::io::timer;

mod game_menu;
mod game_state;
mod menu;

#[cfg(target_os="macos")]
#[start]
fn start(argc: int, argv: **u8) -> int {
    native::start(argc, argv, main)
}

fn main() {
  // Game Window
  let menu = Menu::new(~"Line Dodge");
  let game_window = game_menu::GameWindow::new(~menu);
  //game_window.set_game_state(~menu);
  //

  // Player
  // let mut circle = match CircleShape::new() {
  //   Some(circle)  =>  circle,
  //   None          =>  fail!("Could not render circle.")
  // };
  // circle.set_fill_color(&Color::green());
  // circle.set_radius(50.);
  //
  
  // while window.is_open() {
  //   handle_input(&mut window, &mut circle);
  //   window.clear(&Color::new_RGB(0,0,0));
  //   window.display();
  // }
}

menu.rs

use game_state::GameState;
mod game_state;

pub struct Menu {
  text: ~str
}

impl Menu {
  pub fn new(text: ~str) -> Menu {
    Menu {
      text: text,
    }
  }

  pub fn text<'a>(&'a self) -> &'a str {
    self.text.as_slice()
  }
}

impl GameState for Menu {
  fn update() {}
  fn draw() {}
}