BorrowDecode not implemented for slices of borrowed elements

[kirawi]

I have this code:

use std::time::SystemTime;

use bincode::BorrowDecode;

/// A written Work (novel/comic/etc.). It can contain text and images
// TODO: See if this is even possible w/ borrow checker and sled's db
#[derive(BorrowDecode)]
pub struct LibEntry<'db> {
    pub title: &'db str,
    pub description: &'db str,
    pub chapters: &'db [Chapter<'db>],

    pub authors: &'db [&'db str],

    // Dates
    pub publish: SystemTime,
    pub update: SystemTime,
}

#[derive(BorrowDecode)]
pub struct Chapter<'db> {
    pub title: &'db str,
    pub elements: &'db [Entry<'db>],
}

#[derive(BorrowDecode)]
pub enum Entry<'db> {
    Paragraph(&'db str),
    Image(&'db [u8]),
}

Which results in errors like:

the trait bound `&[Chapter<'_>]: BorrowDecode<'_>` is not satisfied
the following other types implement trait `BorrowDecode<'de>`:
  &'a [u8]
  [T; N]
the trait bound `&[&str]: BorrowDecode<'_>` is not satisfied
the following other types implement trait `BorrowDecode<'de>`:
  &'a [u8]
  [T; N]

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[VictorKoenders]

This is not possible with borrowed decode. We have no way of knowing during decoding that &[T] is perfectly the same in-memory, except if this is a u8 for which we have an exception. Please use a Vec<&str> instead.