meta: minor changes

TODO

@@ -36,7 +36,6 @@
 * make meta work across boundaries
   - extend and make factory::prop more flexible
   - entt::reflect<T>().type("foo"_hs, entt::as_property); or similar
-  - forbid reflecting two times the same type
   - name-less reflect/type (for named types)
   - a better context
   - tests, doc

src/entt/meta/factory.hpp

@@ -271,9 +271,9 @@ public:
     auto type(const ENTT_ID_TYPE identifier) ENTT_NOEXCEPT {
         auto * const node = internal::meta_info<Type>::resolve();
 
-        node->identifier = identifier;
         ENTT_ASSERT(!duplicate(identifier, *internal::meta_info<>::ctx));
         ENTT_ASSERT(!duplicate(node, *internal::meta_info<>::ctx));
+        node->identifier = identifier;
         node->next = *internal::meta_info<>::ctx;
         *internal::meta_info<>::ctx = node;
 
@@ -551,9 +551,9 @@ public:
             curr = &node;
         }
 
-        curr->identifier = identifier;
         ENTT_ASSERT(!duplicate(identifier, type->data));
         ENTT_ASSERT(!duplicate(curr, type->data));
+        curr->identifier = identifier;
         curr->next = type->data;
         type->data = curr;
 
@@ -598,9 +598,9 @@ public:
             &internal::getter<Type, Getter, Policy>
         };
 
-        node.identifier = identifier;
         ENTT_ASSERT(!duplicate(identifier, type->data));
         ENTT_ASSERT(!duplicate(&node, type->data));
+        node.identifier = identifier;
         node.next = type->data;
         type->data = &node;
 
@@ -640,9 +640,9 @@ public:
             }
         };
 
-        node.identifier = identifier;
         ENTT_ASSERT(!duplicate(identifier, type->func));
         ENTT_ASSERT(!duplicate(&node, type->func));
+        node.identifier = identifier;
         node.next = type->func;
         type->func = &node;