actually compiles and does stuff now

src/ir/id.rs

@@ -0,0 +1,42 @@
+use std::fmt::Debug;
+
+#[derive(Clone, Copy, Eq, Hash, PartialEq)]
+pub struct TypeID(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 AddrID(pub usize);
+
+impl Debug for VarID {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "var{}", self.0)
+    }
+}
+
+impl Debug for TypeID {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "ty{}", self.0)
+    }
+}
+
+impl Debug for FnID {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "fn{}", self.0)
+    }
+}
+
+impl Debug for DataID {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "data{}", self.0)
+    }
+}
+
+impl Debug for AddrID {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "@{}", self.0)
+    }
+}