structs r a lot more sane in code, can now actually assign & stuff

src/ir/id.rs

@@ -1,14 +1,17 @@
 use std::fmt::Debug;
 
 #[derive(Clone, Copy, Eq, Hash, PartialEq)]
-pub struct TypeID(pub usize);
+pub struct StructID(pub usize);
 #[derive(Clone, Copy, Eq, Hash, PartialEq)]
 pub struct VarID(pub usize);
 #[derive(Clone, Copy, Eq, Hash, PartialEq)]
 pub struct FnID(pub usize);
 #[derive(Clone, Copy, Eq, Hash, PartialEq)]
 pub struct DataID(pub usize);
+#[derive(Clone, Copy, Eq, Hash, PartialEq)]
+pub struct FieldID(pub usize);
 
+// I had an idea for why these were different... now I don't
 pub type Size = u32;
 pub type Len = u32;
 
@@ -18,7 +21,7 @@ impl Debug for VarID {
     }
 }
 
-impl Debug for TypeID {
+impl Debug for StructID {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         write!(f, "ty{}", self.0)
     }
@@ -35,3 +38,9 @@ impl Debug for DataID {
         write!(f, "data{}", self.0)
     }
 }
+
+impl Debug for FieldID {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "field{}", self.0)
+    }
+}