fix(ecs): make Component trait not automatic & add derive macro

1 files changed, 22 insertions, 7 deletions

diff --git a/ecs/examples/simple.rs b/ecs/examples/simple.rs
index b58d2ba..b8dc50f 100644
--- a/ecs/examples/simple.rs
+++ b/ecs/examples/simple.rs
@@ -1,14 +1,21 @@
-use ecs::{Query, World};
+use ecs::{Component, Query, World};
 
+#[derive(Component)]
 struct SomeData
 {
     num: u64,
 }
 
-fn say_hello(mut query: Query<(SomeData, String)>)
+#[derive(Component)]
+struct Greeting
 {
-    for (data, text) in query.iter_mut() {
-        println!("Hello {}: {}", text, data.num);
+    greeting: String,
+}
+
+fn say_hello(mut query: Query<(SomeData, Greeting)>)
+{
+    for (data, greeting) in query.iter_mut() {
+        println!("{}: {}", greeting.greeting, data.num);
     }
 }
 
@@ -24,9 +31,17 @@ fn main()
 
     world.register_system(Event::Start, say_hello);
 
-    world.create_entity((SomeData { num: 987_654 }, "Yoo".to_string()));
-
-    world.create_entity((SomeData { num: 345 }, "Haha".to_string()));
+    world.create_entity((
+        SomeData { num: 987_654 },
+        Greeting {
+            greeting: "Good afternoon".to_string(),
+        },
+    ));
+
+    world.create_entity((
+        SomeData { num: 345 },
+        Greeting { greeting: "Good evening".to_string() },
+    ));
 
     world.emit(&Event::Start);
 }