initialize chained systems (#886)

cart · web-flow · commit 4fecb899aaa3 · 2020-11-17T17:06:47.000-08:00
diff --git a/crates/bevy_ecs/src/system/system.rs b/crates/bevy_ecs/src/system/system.rs
@@ -49,5 +49,5 @@ pub trait System: Send + Sync + 'static {
         unsafe { self.run_unsafe(input, world, resources) }
     }
     fn run_thread_local(&mut self, world: &mut World, resources: &mut Resources);
-    fn initialize(&mut self, _world: &mut World, _resources: &mut Resources) {}
+    fn initialize(&mut self, _world: &mut World, _resources: &mut Resources);
 }
diff --git a/crates/bevy_ecs/src/system/system_chaining.rs b/crates/bevy_ecs/src/system/system_chaining.rs
@@ -68,6 +68,11 @@ impl<SystemA: System, SystemB: System<Input = SystemA::Output>> System
         self.system_a.run_thread_local(world, resources);
         self.system_b.run_thread_local(world, resources);
     }
+
+    fn initialize(&mut self, world: &mut World, resources: &mut Resources) {
+        self.system_a.initialize(world, resources);
+        self.system_b.initialize(world, resources);
+    }
 }
 
 pub trait IntoChainSystem<AParams, BParams, IntoB, SystemA, SystemB>:

Original file line number	Diff line number	Diff line change
`@@ -49,5 +49,5 @@ pub trait System: Send + Sync + 'static {`
`49`	`49`	`unsafe { self.run_unsafe(input, world, resources) }`
`50`	`50`	`}`
`51`	`51`	`fn run_thread_local(&mut self, world: &mut World, resources: &mut Resources);`
`52`		`- fn initialize(&mut self, _world: &mut World, _resources: &mut Resources) {}`
	`52`	`+ fn initialize(&mut self, _world: &mut World, _resources: &mut Resources);`
`53`	`53`	`}`
Original file line number	Diff line number	Diff line change
`@@ -68,6 +68,11 @@ impl<SystemA: System, SystemB: System<Input = SystemA::Output>> System`
`68`	`68`	`self.system_a.run_thread_local(world, resources);`
`69`	`69`	`self.system_b.run_thread_local(world, resources);`
`70`	`70`	`}`
	`71`	`+`
	`72`	`+ fn initialize(&mut self, world: &mut World, resources: &mut Resources) {`
	`73`	`+ self.system_a.initialize(world, resources);`
	`74`	`+ self.system_b.initialize(world, resources);`
	`75`	`+ }`
`71`	`76`	`}`
`72`	`77`
`73`	`78`	`pub trait IntoChainSystem<AParams, BParams, IntoB, SystemA, SystemB>:`