stuff

src/util/id.rs

@@ -4,12 +4,12 @@
 /// point to something valid, although duplicate
 /// gets around this if needed
 #[derive(Eq, Hash, PartialEq, Debug)]
-pub struct ID(usize);
+pub struct ID(u64);
 
 #[derive(Default)]
 pub struct IDTracker {
     free: Vec<ID>,
-    cur: usize,
+    cur: u64,
 }
 
 impl IDTracker {