Rust Programming By Example

Solution

I guess you did it without any issues, but in any case, here's the code:

    extern crate sdl2;

    use sdl2::event::Event;
    use sdl2::keyboard::Keycode;
    use sdl2::pixels::Color;
    use sdl2::rect::Rect;
    use sdl2::render::{Canvas, Texture, TextureCreator};
    use sdl2::video::{Window, WindowContext};

    use std::thread::sleep;
    use std::time::{Duration, SystemTime};

    // To make things easier to read, we'll create a constant which       will be the texture's size.
    const TEXTURE_SIZE: u32 = 32;

    #[derive(Clone, Copy)]
    enum TextureColor {
      Green,
      Blue,
   }

   fn create_texture_rect<'a>(canvas: &mut Canvas<Window>,
     texture_creator: &'a TextureCreator<WindowContext>,
     color: TextureColor,
     size: u32) -> Option<Texture<'a>> {
      // We'll want to handle failures ...