Re: build warning in libgpiod rust bindings with rust 1.83

[Kent Gibson <warthog618@gmail.com>]

On Fri, Dec 20, 2024 at 05:25:16PM +0100, Bartosz Golaszewski wrote:
> Hi Viresh et al,
>
> I noticed the following warning when building libgpiod rust bindings
> with rust 1.83:
>
> warning: elided lifetime has a name
>   --> libgpiod/src/line_request.rs:234:26
>    |
> 231 |     pub fn read_edge_events<'a>(
>    |                             -- lifetime `'a` declared here
> ...
> 234 |     ) -> Result<request::Events> {
>    |                          ^^^^^^ this elided lifetime gets resolved as `'a`
>    |
>    = note: `#[warn(elided_named_lifetimes)]` on by default
>
> Could you please take a look as I have no idea what that means?
>

clippy is complaining that the lifetime of the returned object is implicit.

Try:

--- a/bindings/rust/libgpiod/src/line_request.rs
+++ b/bindings/rust/libgpiod/src/line_request.rs
@@ -231,7 +231,7 @@ impl Request {
     pub fn read_edge_events<'a>(
         &'a self,
         buffer: &'a mut request::Buffer,
-    ) -> Result<request::Events> {
+    ) -> Result<request::Events<'a>> {
         buffer.read_edge_events(self)
     }
 }

to make it explicit.

Cheers,
Kent.