49.8.3 Encodable
serialize::Encodable is a trait implemented for types to make them encodable
by the serialize module.
Encodable types can be serialized into JSON using json::encode.
Just like Decodable, Encodable can be automatically derived for a struct
using #[deriving(Encodable)].
extern crate serialize;
use serialize::{json, Encodable};
#[deriving(Encodable)]
struct City {
name: &'static str,
// Latitude
lat: f32,
// Longitude
lon: f32,
}
fn main() {
for city in [
City { name: "São Paulo", lat: -23.55, lon: -46.633333 },
City { name: "Lima", lat: -12.043333, lon: -77.028333 },
City { name: "Santiago", lat: -33.45, lon: -70.666667 },
].iter() {
// `encode` encodes an `Encodable` implementor into a `String`
println!("{}", json::encode(city));
}
}