Re: [PATCH v3] rust: macros: improve `#[vtable]` documentation

[Martin Rodriguez Reboredo]

On 10/26/23 17:19, Benno Lossin wrote:
> Traits marked with `#[vtable]` need to provide default implementations
> for optional functions. The C side represents these with `NULL` in the
> vtable, so the default functions are never actually called. We do not
> want to replicate the default behavior from C in Rust, because that is
> not maintainable. Therefore we should use `build_error` in those default
> implementations. The error message for that is provided at
> `kernel::error::VTABLE_DEFAULT_ERROR`.
>
> Signed-off-by: Benno Lossin <benno.lossin@xxxxxxxxx>
> ---
> v2 -> v3:
> - don't hide the import of the constant in the example
> - fixed "function" typo
> - improve paragraph about optional functions
> - do not remove the `Send + Sync + Sized` bounds on the example
>
> v1 -> v2:
> - removed imperative mode in the paragraph describing optional
>    functions.
>
> [...]
Reviewed-by: Martin Rodriguez Reboredo <yakoyoku@xxxxxxxxx>