05

src/ir/types.zig

@@ -272,6 +272,30 @@ pub const TypeTable = struct {
         return id;
     }
 
+    /// Update the TypeInfo for an existing TypeId. Used when a forward-declared
+    /// type (e.g., struct with empty fields) gets its full definition later.
+    pub fn update(self: *TypeTable, id: TypeId, info: TypeInfo) void {
+        const idx = id.index();
+        if (idx < self.infos.items.len) {
+            self.infos.items[idx] = info;
+        }
+    }
+
+    /// Find a named type (struct/union/enum) by its StringId name.
+    /// Returns the TypeId if found, null otherwise.
+    pub fn findByName(self: *const TypeTable, name: StringId) ?TypeId {
+        for (self.infos.items, 0..) |info, i| {
+            const n: ?StringId = switch (info) {
+                .@"struct" => |s| s.name,
+                .@"union" => |u| u.name,
+                .@"enum" => |e| e.name,
+                else => null,
+            };
+            if (n != null and n.? == name) return TypeId.fromIndex(@intCast(i));
+        }
+        return null;
+    }
+
     // ── Convenience constructors ────────────────────────────────────────
 
     pub fn ptrTo(self: *TypeTable, pointee: TypeId) TypeId {