Rework of FFI, adding a value identifier, so we can keep knowledge of data even when data moves.

src/static_data/species_data/ability.rs

@@ -1,9 +1,11 @@
 use crate::static_data::EffectParameter;
-use crate::StringKey;
+use crate::{StringKey, ValueIdentifiable, ValueIdentifier};
 
 /// An ability is a passive effect in battle that is attached to a Pokemon.
 #[derive(Debug)]
 pub struct Ability {
+    /// A unique identifier so we know what value this is.
+    identifier: ValueIdentifier,
     /// The name of the ability.
     name: StringKey,
     /// The name of the script effect of the ability.
@@ -16,6 +18,7 @@ impl Ability {
     /// Instantiates a new ability.
     pub fn new(name: &StringKey, effect: &StringKey, parameters: Vec<EffectParameter>) -> Self {
         Self {
+            identifier: Default::default(),
             name: name.clone(),
             effect: effect.clone(),
             parameters,
@@ -36,6 +39,12 @@ impl Ability {
     }
 }
 
+impl ValueIdentifiable for Ability {
+    fn value_identifier(&self) -> ValueIdentifier {
+        self.identifier
+    }
+}
+
 /// An ability index allows us to find an ability on a form. It combines a bool for whether the
 /// ability is hidden or not, and then an index of the ability.
 #[derive(Copy, Clone, Debug, Eq, PartialEq)]