Looks like this is _possibly_ working but the last step of actually loading a save needs to be figured out.

map.hpp

@@ -6,6 +6,7 @@
 #include <algorithm>
 #include <fmt/core.h>
 #include "point.hpp"
+#include "tser.hpp"
 
 #define INV_WALL 0
 #define INV_SPACE 1
@@ -19,6 +20,8 @@ struct Room {
   size_t height = 0;
   Point entry;
   Point exit;
+
+  DEFINE_SERIALIZABLE(Room, x, y, width, height);
 };
 
 typedef std::vector<int> MatrixRow;
@@ -28,12 +31,12 @@ void dump_map(const std::string &msg, Matrix &map);
 void add_neighbors(Matrix &closed, size_t j, size_t i);
 
 class Map {
+public:
   Matrix $input_map;
   Matrix $walls;
   Matrix $paths;
   std::vector<Room> $rooms;
   int $limit = 0;
-public:
 
   // make explicit
   Map(Matrix input_map, Matrix walls_map, int limit) :