1 files changed, 30 insertions, 1 deletions
diff --git a/ecs/src/uid.rs b/ecs/src/uid.rs
index a361882..bb393a1 100644
--- a/ecs/src/uid.rs
+++ b/ecs/src/uid.rs
@@ -2,8 +2,10 @@ use std::fmt::{Debug, Display, Formatter};
 use std::mem::transmute;
 use std::sync::atomic::{AtomicU32, Ordering};
 
+use seq_macro::seq;
+
 use crate::component::Component;
-use crate::util::{gen_mask_64, BitMask, NumberExt};
+use crate::util::{gen_mask_64, Array, BitMask, NumberExt};
 
 static NEXT: AtomicU32 = AtomicU32::new(Uid::FIRST_UNIQUE_ID);
 
@@ -230,3 +232,30 @@ impl<ComponentT: Component> With for ComponentT
         Self::id()
     }
 }
+
+pub trait WithUidTuple
+{
+    type UidsArray: Array<Uid>;
+
+    fn uids() -> Self::UidsArray;
+}
+
+macro_rules! impl_with_uid_tuple {
+    ($c: tt) => {
+        seq!(I in 0..=$c {
+            impl<#(WithUid~I: With,)*> WithUidTuple for (#(WithUid~I,)*)
+            {
+                type UidsArray = [Uid; $c + 1];
+
+                fn uids() -> Self::UidsArray
+                {
+                    [#(WithUid~I::uid(),)*]
+                }
+            }
+        });
+    };
+}
+
+seq!(C in 0..=16 {
+    impl_with_uid_tuple!(C);
+});