How to deserialize/serialize struct as array without keys

Question

How can I de/serialize struct without keys ? Since i will not be changing the order of fields, Indexes can act as keys which will reduce the size of payload.

I'm working with serde_json and ciborium crates which both have top level array value.

for example,

following cbor/json

["string1", 1, 1.1, [4, 34, 4, 4]]

should be converted into this

struct Foo {
    a: String,
    b: u128,
    c: f64,
    d: Vec<u8>,
}

I could manually do this by using Value::array enum of ciborium crate but then I will end up writing more code and won't be able to use serde_bytes crate to efficiently decode Vec<u8>

You can write your own impl of Deserialize for S1: serde.rs/impl-deserialize.html — Thomas
– Thomas, Commented Sep 12, 2021 at 10:02

Stargateur · Accepted Answer · 2021-09-12 12:40:04Z

2

Simply use serde_tuple that is dedicated to "De/serialize struct as an array of values" issue #637:

#[derive(serde_tuple::Serialize_tuple, serde_tuple::Deserialize_tuple)]
struct Foo {
    a: String,
    b: u128,
    c: f64,
    d: Vec<u8>,
}

edited Sep 12, 2021 at 12:40

answered Sep 12, 2021 at 12:28

Stargateur

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