Closed
Description
Bevy version
Commit: ec822c8
What you did
#[derive(Reflect)]
enum Empty {}What went wrong
cargo build:
error[E0277]: `!` does not implement `Reflect` so cannot be fully reflected
--> examples/reflection/reflection.rs:51:10
|
51 | #[derive(Reflect)]
| ^^^^^^^ the trait `bevy_reflect::Reflect` is not implemented for `!`
|
= note: consider annotating `!` with `#[derive(Reflect)]`
= help: the following other types implement trait `bevy_reflect::Reflect`:
&'static std::panic::Location<'static>
&'static std::path::Path
&'static str
()
(A, B)
(A, B, C)
(A, B, C, D)
(A, B, C, D, E)
and 735 others
= note: this error might have been caused by changes to Rust's type-inference algorithm (see issue #48950 <https://github.com/rust-lang/rust/issues/48950> for more information)
= help: did you intend to use the type `()` here instead?
= note: required for the cast from `Box<!>` to `Box<dyn bevy_reflect::Reflect>`
= note: this error originates in the derive macro `Reflect` (in Nightly builds, run with -Z macro-backtrace for more info)
rust-analayzer:
missing match arm: type `&Empty` is non-empty
Additional information
Seem that the problem is in this code generated by Reflect derive macro:
#[inline]
#[allow(
unreachable_code,
reason = "Ignored fields without a `clone` attribute will early-return with an error"
)]
fn reflect_clone(
&self,
) -> ::core::result::Result<
bevy_reflect::__macro_exports::alloc_utils::Box<dyn bevy_reflect::Reflect>,
bevy_reflect::ReflectCloneError,
> {
let this = self;
::core::result::Result::Ok(bevy_reflect::__macro_exports::alloc_utils::Box::new(
match this {},
))
}