More main progress; tons of headers & stuff

Former-commit-id: a6e365791b

include/rstl/optional_object.hpp

@@ -13,16 +13,33 @@ public:
   optional_object(const T& item) : x0_item(item), x4_valid(true) {}
   ~optional_object() { clear(); }
 
+  optional_object& operator=(const T& item) {
+    assign(item);
+    return *this;
+  }
+
   T& data() { return x0_item; }
+  T* get_ptr() { return &x0_item; }
   operator bool() const { return x4_valid; }
   void clear() {
     rstl::destroy(&x0_item);
     x4_valid = false;
   }
 
+  T& operator*() { return data(); }
+
 private:
   T x0_item;
   bool x4_valid;
+
+  void assign(const T& item) {
+    if (!x4_valid) {
+      rstl::construct(get_ptr(), item);
+      x4_valid = true;
+    } else {
+      data() = item;
+    }
+  }
 };
 } // namespace rstl