From a7c5493ddc970965d7d7305e1c926bc26ba89eb5 Mon Sep 17 00:00:00 2001
From: akimakinai <105044389+akimakinai@users.noreply.github.com>
Date: Sat, 25 Nov 2023 21:38:01 +0900
Subject: [PATCH] Manual `impl Default` for EventTrigger

---
 src/trigger.rs | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/trigger.rs b/src/trigger.rs
index abd3268..681de79 100644
--- a/src/trigger.rs
+++ b/src/trigger.rs
@@ -292,7 +292,7 @@ impl DoneTrigger {
 }
 
 /// Trigger that transitions when it receives the associated event
-#[derive(Debug, Default, Clone, Copy)]
+#[derive(Debug, Clone, Copy)]
 pub struct EventTrigger<T: Clone + Event>(PhantomData<T>);
 
 impl<T: Clone + Event> OptionTrigger for EventTrigger<T> {
@@ -308,6 +308,13 @@ impl<T: Clone + Event> OptionTrigger for EventTrigger<T> {
     }
 }
 
+// derive(Default) requires `T: Default`
+impl<T: Clone + Event> Default for EventTrigger<T> {
+    fn default() -> Self {
+        Self(PhantomData)
+    }
+}
+
 pub(crate) fn remove_done_markers(mut commands: Commands, dones: Query<Entity, With<Done>>) {
     for done in &dones {
         commands.entity(done).remove::<Done>();