From 23dbcf921568fcb0fe200c0fae672f5091c90d18 Mon Sep 17 00:00:00 2001
From: Jean Mertz <git@jeanmertz.com>
Date: Fri, 17 Jan 2025 02:19:09 +0100
Subject: [PATCH] impl Default for StateScoped<S: Default> (#17401)

This allows this:

```rust
#[derive(Component)]
#[require(StateScoped<MyState>(StateScoped(MyState)))]
struct ComponentA;
```

To be shortened to this:

```rust
#[derive(Component)]
#[require(StateScoped<MyState>)]
struct ComponentA;
```

When `MyState` implements `Default`.

Signed-off-by: Jean Mertz <git@jeanmertz.com>
---
 crates/bevy_state/src/state_scoped.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/crates/bevy_state/src/state_scoped.rs b/crates/bevy_state/src/state_scoped.rs
index 3e9f49f517..02a8c75cdc 100644
--- a/crates/bevy_state/src/state_scoped.rs
+++ b/crates/bevy_state/src/state_scoped.rs
@@ -60,6 +60,15 @@ use crate::state::{StateTransitionEvent, States};
 #[cfg_attr(feature = "bevy_reflect", derive(Reflect), reflect(Component))]
 pub struct StateScoped<S: States>(pub S);
 
+impl<S> Default for StateScoped<S>
+where
+    S: States + Default,
+{
+    fn default() -> Self {
+        Self(S::default())
+    }
+}
+
 /// Removes entities marked with [`StateScoped<S>`]
 /// when their state no longer matches the world state.
 ///