Fiddling with PartialEq on Value trait

src/types/mod.rs

@@ -2,15 +2,41 @@
  * Eryn Wells <eryn@erynwells.me>
  */
 
-use std::fmt;
+use std::fmt::Debug;
+use std::any::Any;
 
 pub use self::number::Number;
 
 pub mod number;
 
-pub type Boolean = bool;
-pub type Character = char;
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub struct Boolean(bool);
 
-pub trait Value: fmt::Debug { }
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub struct Character(char);
+
+pub trait Value: Debug + 'static { }
 impl Value for Boolean { }
 impl Value for Character { }
+
+impl<'a,'b> PartialEq<&'a Value> for &'b Value {
+    fn eq(&self, other: &&Value) -> bool {
+        other.as_any().downcast_ref::<Self>().map_or(false, |x| x == self)
+    }
+}
+
+impl Value {
+    fn as_any(&self) -> &Any { self }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn booleans_are_equal() {
+        assert_eq!(Boolean(true), Boolean(true));
+        assert_eq!(Boolean(false), Boolean(false));
+        assert_ne!(Boolean(true), Boolean(false));
+    }
+}