From 7f3072ed7e016dff359439d7580403e36ad6b325 Mon Sep 17 00:00:00 2001
From: HampusM <hampus@hampusmat.com>
Date: Wed, 15 Oct 2025 18:40:19 +0200
Subject: feat(ecs): add EventMatch convenience fns for component events

---
 ecs/src/system/observer.rs | 23 +++++++++++++++--------
 1 file changed, 15 insertions(+), 8 deletions(-)

(limited to 'ecs/src/system')

diff --git a/ecs/src/system/observer.rs b/ecs/src/system/observer.rs
index b7d84be..236420c 100644
--- a/ecs/src/system/observer.rs
+++ b/ecs/src/system/observer.rs
@@ -82,18 +82,19 @@ impl<'world, ObservedT: Observed> Observe<'world, ObservedT>
 impl<ObservedT: Observed> Observe<'_, ObservedT>
 {
     #[must_use]
-    pub fn iter(&self) -> ObserveIter<'_>
+    pub fn iter(&self) -> ObserveIter<'_, ObservedT>
     {
         ObserveIter {
             world: self.world,
             inner: self.emitted_event.match_ids.iter(),
+            _pd: PhantomData,
         }
     }
 }
 
 impl<'a, ObservedT: Observed> IntoIterator for &'a Observe<'_, ObservedT>
 {
-    type IntoIter = ObserveIter<'a>;
+    type IntoIter = ObserveIter<'a, ObservedT>;
     type Item = <Self::IntoIter as Iterator>::Item;
 
     fn into_iter(self) -> Self::IntoIter
@@ -102,33 +103,39 @@ impl<'a, ObservedT: Observed> IntoIterator for &'a Observe<'_, ObservedT>
     }
 }
 
-pub struct ObserveIter<'observe>
+pub struct ObserveIter<'observe, ObservedT: Observed>
 {
     world: &'observe World,
     inner: SliceIter<'observe, Uid>,
+    _pd: PhantomData<ObservedT>,
 }
 
-impl<'observe> Iterator for ObserveIter<'observe>
+impl<'observe, ObservedT: Observed> Iterator for ObserveIter<'observe, ObservedT>
 {
-    type Item = EventMatch<'observe>;
+    type Item = EventMatch<'observe, ObservedT>;
 
     fn next(&mut self) -> Option<Self::Item>
     {
         let match_id = *self.inner.next()?;
 
-        Some(EventMatch { world: self.world, id: match_id })
+        Some(EventMatch {
+            world: self.world,
+            id: match_id,
+            _pd: PhantomData,
+        })
     }
 }
 
 /// A event match.
 #[derive(Debug)]
-pub struct EventMatch<'world>
+pub struct EventMatch<'world, ObservedT: Observed>
 {
     world: &'world World,
     id: Uid,
+    _pd: PhantomData<ObservedT>,
 }
 
-impl<'world> EventMatch<'world>
+impl<'world, ObservedT: Observed> EventMatch<'world, ObservedT>
 {
     #[must_use]
     pub fn id(&self) -> Uid
-- 
cgit v1.2.3-18-g5258