ffi struct produces warnings on Rust 1.79.0 or +nightly #270
Description
I have a struct that I use to convert wrapped errors to strings that can be sent to Swift:
#[swift_bridge::bridge]
mod ffi {
#[swift_bridge(swift_repr = "struct")]
pub struct BridgedError {
pub inner: String
}
}This compiles without any errors in Rust 1.77.2, but when I compile it with nightly it produces the following warning:
> cargo +nightly build -Zbuild-std --package my-bridge --target aarch64-apple-darwin
error: field `0` is never read
--> rust/my-bridge/src/lib.rs:17:14
|
14 | #[swift_bridge::bridge]
| ----------------------- field in this variant
...
17 | pub struct BridgedError {
| ^^^^^^^^^^^^
|
note: the lint level is defined here
--> rust/my-bridge/src/lib.rs:2:38
|
2 | #![cfg_attr(feature = "strict", deny(warnings))]
| ^^^^^^^^
= note: `#[deny(dead_code)]` implied by `#[deny(warnings)]`
help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
|
17 | pub struct () {
| ~~
I'm starting to play around with cross-compiling to watchOS, tvOS, and eventually visionOS, but am finding these targets only seem to build on nightly.