readme.rs - mozsearch

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// NOTE: This file should be kept in sync with README.md

use serde_derive::{Deserialize, Serialize};

use std::error::Error;

use std::fs::File;

// Types annotated with `Serialize` can be stored as CBOR.

// To be able to load them again add `Deserialize`.

#[derive(Debug, Serialize, Deserialize)]

struct Mascot {

    name: String,

    species: String,

    year_of_birth: u32,

fn main() -> Result<(), Box<dyn Error>> {

    let ferris = Mascot {

        name: "Ferris".to_owned(),

        species: "crab".to_owned(),

        year_of_birth: 2015,

};

    let ferris_file = File::create("examples/ferris.cbor")?;

    // Write Ferris to the given file.

    // Instead of a file you can use any type that implements `io::Write`

    // like a HTTP body, database connection etc.

    serde_cbor::to_writer(ferris_file, &ferris)?;

    let tux_file = File::open("examples/tux.cbor")?;

    // Load Tux from a file.

    // Serde CBOR performs roundtrip serialization meaning that

    // the data will not change in any way.

    let tux: Mascot = serde_cbor::from_reader(tux_file)?;

    println!("{:?}", tux);

    // prints: Mascot { name: "Tux", species: "penguin", year_of_birth: 1996 }

    Ok(())