Working example

src/utils/interner.rs

@@ -0,0 +1,27 @@
+// use std::{collections::HashSet, hash::Hash};
+
+// use hashbrown::HashMap;
+
+// #[derive(Copy, Clone)]
+// pub struct Interned<'a, T> {
+//   interner: &'a Interner<T>,
+//   data: &'a T,
+// }
+
+// impl<'a, T: Eq> Eq for Interned<'a, T> {}
+// impl<'a, T: PartialEq> PartialEq for Interned<'a, T> {
+//   fn eq(&self, other: &Self) -> bool {
+//     if (self.interner as *const _) == (other.interner as *const _) {
+//       (self.data as *const _) == (other.data as *const _)
+//     } else {self.data == other.data}
+//   }
+// }
+
+// pub struct Interner<T> {
+//   data: HashSet<T>,
+//   hash_cache: HashMap<>
+// }
+
+// impl Interner<T> {
+
+// }

src/utils/mod.rs

@@ -1,6 +1,7 @@
 mod cache;
 pub mod translate;
 mod replace_first;
+mod interner;
 // mod visitor;
 pub use replace_first::replace_first;
 pub use cache::Cache;