tfhe-versionable 0.8.0

tfhe-versionable: Add versioning informations/backward compatibility on rust types used for serialization
Documentation 
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//! Test the impl of Versionize for various types

use std::collections::{HashMap, HashSet};
use std::io::Cursor;
use std::marker::PhantomData;
use std::num::Wrapping;
use std::sync::Arc;

use aligned_vec::{ABox, AVec};
use num_complex::Complex;
use tfhe_versionable::{Unversionize, Versionize};

use backward_compat::{CustomVersions, MyStructVersions};

#[derive(PartialEq, Clone, Debug, Versionize)]
#[versionize(CustomVersions)]
struct Custom(u32);

#[derive(PartialEq, Clone, Debug, Versionize)]
#[versionize(MyStructVersions)]
pub struct MyStruct {
    wrap: Wrapping<bool>,
    base_box: Box<u8>,
    sliced_box: Box<[u16; 50]>,
    base_vec: Vec<u32>,
    base_vec_vec: Vec<Vec<u32>>,
    custom_vec_vec: Vec<Vec<Custom>>,
    custom_vec_vec_vec: Vec<Vec<Vec<Custom>>>,
    s: String,
    opt: Option<u64>,
    phantom: PhantomData<u128>,
    arc: Arc<i8>,
    complex: Complex<i16>,
    aligned_box: ABox<i32>,
    aligned_vec: AVec<i64>,
    never: (),
    tuple: (f32, f64),
    set: HashSet<i128>,
    map: HashMap<char, bool>,
    timestamp: std::time::SystemTime,
}

mod backward_compat {
    use tfhe_versionable::VersionsDispatch;

    use crate::Custom;

    use super::MyStruct;

    #[derive(VersionsDispatch)]
    #[allow(unused)]
    pub enum MyStructVersions {
        V0(MyStruct),
    }

    #[derive(VersionsDispatch)]
    #[allow(unused)]
    pub enum CustomVersions {
        V0(Custom),
    }
}

#[test]
fn test_types() {
    let stru = MyStruct {
        wrap: Wrapping(false),
        base_box: Box::new(42),
        sliced_box: vec![11; 50].into_boxed_slice().try_into().unwrap(),
        base_vec: vec![1234, 5678],
        base_vec_vec: vec![vec![1234, 5678], vec![9012, 3456]],
        custom_vec_vec: vec![
            vec![9876, 5432, 1987, 6543]
                .into_iter()
                .map(Custom)
                .collect(),
            vec![1098, 7654, 3210, 9876]
                .into_iter()
                .map(Custom)
                .collect(),
        ],
        custom_vec_vec_vec: vec![
            vec![
                vec![9876, 5432].into_iter().map(Custom).collect(),
                vec![1987, 6543].into_iter().map(Custom).collect(),
            ],
            vec![
                vec![1098, 7654].into_iter().map(Custom).collect(),
                vec![3210, 9876].into_iter().map(Custom).collect(),
            ],
        ],

        s: String::from("test"),
        opt: Some(0xdeadbeef),
        phantom: PhantomData,
        arc: Arc::new(-1),
        complex: Complex::new(-37, -45),
        aligned_box: ABox::new(0, -98765),
        aligned_vec: AVec::from_slice(0, &[1, 2, 3, 4]),
        never: (),
        tuple: (std::f32::consts::PI, std::f64::consts::E),
        set: HashSet::from_iter([1, 2, 3]),
        map: HashMap::from_iter([('t', true), ('e', false), ('s', true)]),
        timestamp: std::time::SystemTime::now(),
    };

    let mut ser = Vec::new();
    ciborium::ser::into_writer(&stru.versionize(), &mut ser).unwrap();

    let unser =
        MyStruct::unversionize(ciborium::de::from_reader(&mut Cursor::new(&ser)).unwrap()).unwrap();

    assert_eq!(stru, unser);
}