dispatcher: use only sequential indexes now

src/entt/signal/dispatcher.hpp

@@ -33,7 +33,6 @@ class dispatcher {
         virtual ~basic_pool() = default;
         virtual void publish() = 0;
         virtual void clear() ENTT_NOEXCEPT = 0;
-        virtual id_type type_id() const ENTT_NOEXCEPT = 0;
     };
 
     template<typename Event>
@@ -69,10 +68,6 @@ class dispatcher {
             events.emplace_back(std::forward<Args>(args)...);
         }
 
-        id_type type_id() const ENTT_NOEXCEPT override {
-            return type_info<Event>::id();
-        }
-
     private:
         signal_type signal{};
         std::vector<Event> events;
@@ -81,14 +76,14 @@ class dispatcher {
     template<typename Event>
     pool_handler<Event> & assure() {
         static_assert(std::is_same_v<Event, std::decay_t<Event>>);
-        static std::size_t index{pools.size()};
+        const auto index = type_index<Event>::value();
 
-        if(const auto length = pools.size(); !(index < length) || pools[index]->type_id() != type_info<Event>::id()) {
-            for(index = {}; index < length && pools[index]->type_id() != type_info<Event>::id(); ++index);
+        if(!(index < pools.size())) {
+            pools.resize(index+1);
+        }
 
-            if(index == pools.size()) {
-                pools.emplace_back(new pool_handler<Event>{});
-            }
+        if(!pools[index]) {
+            pools[index].reset(new pool_handler<Event>{});
         }
 
         return static_cast<pool_handler<Event> &>(*pools[index]);
@@ -187,7 +182,9 @@ public:
     void clear() {
         if constexpr(sizeof...(Event) == 0) {
             for(auto &&cpool: pools) {
-                cpool->clear();
+                if(cpool) {
+                    cpool->clear();
+                }
             }
         } else {
             (assure<Event>().clear(), ...);
@@ -217,7 +214,9 @@ public:
      */
     void update() const {
         for(auto pos = pools.size(); pos; --pos) {
-            pools[pos-1]->publish();
+            if(auto &&cpool = pools[pos-1]; cpool) {
+                cpool->publish();
+            }
         }
     }