epserde 0.12.6

ε-serde is an ε-copy (i.e., almost zero-copy) serialization/deserialization framework
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67

/*
 * SPDX-FileCopyrightText: 2023 Inria
 * SPDX-FileCopyrightText: 2023 Sebastiano Vigna
 *
 * SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later
 */

//! Example showing that ε-copy deserialization can be used with
//! a `Vec<String>`, giving back a `Vec<&str>`.
//!
//! Please compile with the "schema" feature to see the schema output.

use epserde::{deser::DeserType, prelude::*, ser::SerType};

#[derive(Epserde, Debug, PartialEq, Eq, Default, Clone)]
struct Data<A> {
    a: A,
}

type Type = Data<Vec<String>>;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    println!("Serializable type: {}", core::any::type_name::<Type>());
    println!(
        "Associated serialization type: {}",
        core::any::type_name::<SerType<Type>>()
    );
    println!();

    let data = Type {
        a: vec!["A".to_owned(), "B".to_owned(), "C".to_owned()],
    };
    let mut cursor = <AlignedCursor<Aligned16>>::new();

    // Serialize
    #[cfg(feature = "schema")]
    {
        let schema = unsafe { data.serialize_with_schema(&mut cursor)? };
        println!("{}", schema.debug(cursor.as_bytes()));
        println!();
    }
    #[cfg(not(feature = "schema"))]
    let _bytes_written = unsafe { data.serialize(&mut cursor)? };

    // Do a full-copy deserialization
    cursor.set_position(0);
    let full = unsafe { Type::deserialize_full(&mut cursor)? };
    println!(
        "Full-copy deserialization: returns the deserializable type {}",
        core::any::type_name::<Type>(),
    );
    println!("Value: {:x?}", full);

    println!();

    // Do an ε-copy deserialization
    let eps = unsafe { Type::deserialize_eps(cursor.as_bytes())? };
    println!(
        "ε-copy deserialization: returns the associated deserialization type {}",
        core::any::type_name::<DeserType<'_, Type>>(),
    );
    println!("Value: {:x?}", eps);

    #[cfg(not(feature = "schema"))]
    println!("\nPlease compile with the \"schema\" feature to see the schema output");
    Ok(())
}