bincode/examples/basic.rs

extern crate bincode;
extern crate rustc_serialize;

use bincode::SizeLimit;

#[derive(RustcEncodable, RustcDecodable, PartialEq)]
struct Entity {
    x: f32,
    y: f32,
}

#[derive(RustcEncodable, RustcDecodable, PartialEq)]
struct World {
    entities: Vec<Entity>
}

fn main() {
    let world = World {
        entities: vec![Entity {x: 0.0, y: 4.0}, Entity {x: 10.0, y: 20.5}]
    };

    let encoded: Vec<u8> = bincode::encode(&world, SizeLimit::Infinite).unwrap();

    // 8 bytes for the length of the vector, 4 bytes per float.
    assert_eq!(encoded.len(), 8 + 4 * 4);

    let decoded: World = bincode::decode(&encoded[..]).unwrap();

    assert!(world == decoded);
}