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40 lines
1.2 KiB
40 lines
1.2 KiB
4 months ago
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// NOTE: This file should be kept in sync with README.md
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use serde_derive::{Deserialize, Serialize};
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use std::error::Error;
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use std::fs::File;
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// Types annotated with `Serialize` can be stored as CBOR.
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// To be able to load them again add `Deserialize`.
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#[derive(Debug, Serialize, Deserialize)]
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struct Mascot {
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name: String,
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species: String,
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year_of_birth: u32,
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}
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fn main() -> Result<(), Box<dyn Error>> {
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let ferris = Mascot {
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name: "Ferris".to_owned(),
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species: "crab".to_owned(),
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year_of_birth: 2015,
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};
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let ferris_file = File::create("examples/ferris.cbor")?;
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// Write Ferris to the given file.
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// Instead of a file you can use any type that implements `io::Write`
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// like a HTTP body, database connection etc.
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serde_cbor::to_writer(ferris_file, &ferris)?;
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let tux_file = File::open("examples/tux.cbor")?;
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// Load Tux from a file.
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// Serde CBOR performs roundtrip serialization meaning that
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// the data will not change in any way.
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let tux: Mascot = serde_cbor::from_reader(tux_file)?;
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println!("{:?}", tux);
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// prints: Mascot { name: "Tux", species: "penguin", year_of_birth: 1996 }
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Ok(())
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}
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