How do I serialize a const generic length array with Serde?

I have the following code:

use serde::{Deserialize, Serialize};

#[derive(Sereialize, Deserialize)]
struct Container<const SIZE: usize> {
    contents: [String; SIZE]
}

But I'm getting this error:

error[E0277]: the trait bound `[String; SIZE]: Deserialize<'_>` is not satisfied
  --> src\lib.rs:18:5
   |
18 |     contents: [String; SIZE],
   |     ^^^^^^^^^ the trait `Deserialize<'_>` is not implemented for `[String; SIZE]`
   |
   = help: the following other types implement trait `Deserialize<'de>`:
             &'a [u8]
             [T; 0]
             [T; 10]
             [T; 11]
             [T; 12]
             [T; 13]
             [T; 14]
             [T; 15]
           and 26 others
note: required by a bound in `_::_serde::__private::de::missing_field`

Seems it's only defined for some specific lengths but not for generic lengths? Is there a way to make this work, ideally without needing to write a custom serializer.

posted over 1 year ago

CC BY-SA 4.0

mousetail‭

51 reputation 2 0 10 0