From 81db6ec70af12f3064f29938da7c258077d4417d Mon Sep 17 00:00:00 2001
From: aecsocket <43144841+aecsocket@users.noreply.github.com>
Date: Tue, 19 Nov 2024 01:28:42 +0000
Subject: [PATCH] Fix `bevy_hierarchy` failing to compile without `reflect`
 feature (#16428)

# Objective

Run this without this PR:
`cargo build -p bevy_hierarchy --no-default-features`

You'll get:
```
error[E0432]: unresolved import `bevy_reflect`
 --> crates/bevy_hierarchy/src/events.rs:2:5
  |
2 | use bevy_reflect::Reflect;
  |     ^^^^^^^^^^^^ use of undeclared crate or module `bevy_reflect`

For more information about this error, try `rustc --explain E0432`.
error: could not compile `bevy_hierarchy` (lib) due to 1 previous error
warning: build failed, waiting for other jobs to finish...
```

Because of this line:
```rs
use bevy_reflect::Reflect;

#[derive(Event, Debug, Clone, PartialEq, Eq)]
#[cfg_attr(feature = "reflect", derive(Reflect), reflect(Debug, PartialEq))]
pub enum HierarchyEvent { .. }
```

## Solution

use FQN: `derive(bevy_reflect::Reflect)`

## Testing

`cargo build -p bevy_hierarchy --no-default-features`
---
 crates/bevy_hierarchy/src/events.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/crates/bevy_hierarchy/src/events.rs b/crates/bevy_hierarchy/src/events.rs
index c397488c08..5a667fef77 100644
--- a/crates/bevy_hierarchy/src/events.rs
+++ b/crates/bevy_hierarchy/src/events.rs
@@ -1,4 +1,5 @@
 use bevy_ecs::{event::Event, prelude::Entity};
+#[cfg(feature = "reflect")]
 use bevy_reflect::Reflect;
 
 /// An [`Event`] that is fired whenever there is a change in the world's hierarchy.