Undo previous change and remove Sets implementation.

src/lib.rs

@@ -1,6 +1,5 @@
 pub mod gc;
 pub mod map;
-
 #[cfg(test)]
 mod tests {
   #[test]

src/map.rs

@@ -33,6 +33,12 @@ pub trait Equivalent<T>: Sized {
     fn matches(&self, other: &T) -> bool;
 }
 
+impl<T: PartialEq> Equivalent<T> for T {
+    fn matches(&self, other: &T) -> bool {
+        self == other
+    }
+}
+
 pub trait Hashes {
     fn hashed(&self) -> Hashed;
 }
@@ -342,59 +348,3 @@ impl<K: Debug + Hashes + PartialEq, V: Debug> Debug for Map<K, V> {
         f.write_fmt(format_args!("Map")) // todo: debug and print the entire thing?
     }
 }
-
-#[derive(PartialEq)]
-pub struct SetEntry<E: Hashes + PartialEq>(Option<E>);
-
-pub struct Set<E: Hashes + PartialEq>(DisplacementSet<SetEntry<E>>);
-
-impl<E: Hashes + PartialEq> Hashes for SetEntry<E> {
-    fn hashed(&self) -> Hashed {
-        todo!()
-    }
-}
-
-impl<E: Hashes + PartialEq> TableEntry for SetEntry<E> {
-    const VACANT: Self = SetEntry(None);
-    fn is_vacant(&self) -> bool {
-        self.0.is_none()
-    }
-}
-
-impl<E: Hashes + PartialEq> Equivalent<E> for SetEntry<E> {
-    fn matches(&self, other: &E) -> bool {
-        self.0.as_ref().unwrap() == other
-    }
-}
-
-impl<K, E: PartialEq + Hashes> Equivalent<K> for SetEntry<E> where K: Equivalent<E> {
-    fn matches(&self, other: &K) -> bool {
-        other.matches(&self.0.as_ref().unwrap())
-    }
-}
-
-impl<E: Hashes + PartialEq> Set<E> {
-    pub fn resize(&mut self, len: usize) {
-        self.0.resize(len)
-    }
-    pub fn set(&mut self, element: E) {
-        self.0.set(SetEntry(Some(element)));
-    }
-    pub fn remove(&mut self, element: E) {
-        self.0.remove(element);
-    }
-    pub fn get<K>(&mut self, element: K) -> Option<&E>
-    where
-        E: Equivalent<K>,
-        K: Hashes,
-    {
-        if let Some(ref entry) = self.0.get(element) {
-            Some(&entry.0.as_ref().unwrap())
-        } else {
-            None
-        }
-    }
-    pub fn new() -> Set<E> {
-        Set(DisplacementSet::new())
-    }
-}