destroy container along with the builders

gateway/include/ha.h

@@ -118,8 +118,8 @@ namespace Ha {
         }
 
         static void deleteAll() {
-            List<AbstractBuilder>::exec(builders, [](AbstractBuilder* builder)
-                                        { delete builder; });
+            builders.forEach([](AbstractBuilder* builder) { delete builder; });
+            builders.empty();
         }
     };
     List<AbstractBuilder> AbstractBuilder::builders;

gateway/include/mqtt.h

@@ -51,15 +51,13 @@ namespace Mqtt {
 
     void publishInit() {
         Ha::publisher = publish;
-        List<Component>::exec(Component::components, [](Component* c)
-                              { c->publishConfig(); });
+        Component::components.forEach([](Component* c) { c->publishConfig(); });
         AbstractBuilder::deleteAll();
         ts.deleteTask(tPublishInit);
     }
 
     void publishCleanupConfig() {
-        List<Component>::exec(Component::components, [](Component* c)
-                              { c->publishCleanupConfig(); });
+        Component::components.forEach([](Component* c) { c->publishCleanupConfig(); });
     }
 
     void onMessage(char* topic, char* payload, AsyncMqttClientMessageProperties properties, size_t len, size_t index, size_t total) {

gateway/include/utils.h

@@ -4,12 +4,12 @@ template <class T>
 struct List {
     struct Container {
         T* t;
-        Container* next;
+        Container* next = nullptr;
         Container(T* t) : t(t) {}
     };
 
-    Container* first;
-    Container* last;
+    Container* first = nullptr;
+    Container* last = nullptr;
 
     void add(T* t) {
         Container* c = new Container{t};
@@ -17,10 +17,19 @@ struct List {
         last = c;
     }
 
-    static void exec(List list, void(*f)(T*)) {
-        for (List::Container *c = list.first; c; c = c->next) {
+    void forEach(void(*f)(T*)) {
+        for (Container *c = first; c; c = c->next) {
             f(c->t);
         }
     }
 
+    void empty() {
+        Container *c = first;
+        while (c) {
+            auto n = c->next;
+            delete c;
+            c = n;
+        }
+    }
+
 };