meta: avoid the +1u trick for 0-sized arrays

src/entt/meta/meta.hpp

@@ -962,8 +962,12 @@ struct meta_func {
      */
     template<typename... Args>
     meta_any invoke(meta_handle instance, Args &&...args) const {
-        meta_any arguments[sizeof...(Args) + 1u]{{*ctx, std::forward<Args>(args)}...};
-        return invoke(std::move(instance), arguments, sizeof...(Args));
+        if constexpr(sizeof...(Args) == 0u) {
+            return invoke(std::move(instance), static_cast<meta_any *>(nullptr), size_type{});
+        } else {
+            meta_any arguments[sizeof...(Args)]{{*ctx, std::forward<Args>(args)}...};
+            return invoke(std::move(instance), arguments, sizeof...(Args));
+        }
     }
 
     /*! @copydoc meta_data::prop */
@@ -1339,8 +1343,12 @@ public:
      */
     template<typename... Args>
     [[nodiscard]] meta_any construct(Args &&...args) const {
-        meta_any arguments[sizeof...(Args) + 1u]{{*ctx, std::forward<Args>(args)}...};
-        return construct(arguments, sizeof...(Args));
+        if constexpr(sizeof...(Args) == 0u) {
+            return construct(static_cast<meta_any *>(nullptr), size_type{});
+        } else {
+            meta_any arguments[sizeof...(Args)]{{*ctx, std::forward<Args>(args)}...};
+            return construct(arguments, sizeof...(Args));
+        }
     }
 
     /**
@@ -1399,8 +1407,12 @@ public:
      */
     template<typename... Args>
     meta_any invoke(const id_type id, meta_handle instance, Args &&...args) const {
-        meta_any arguments[sizeof...(Args) + 1u]{{*ctx, std::forward<Args>(args)}...};
-        return invoke(id, std::move(instance), arguments, sizeof...(Args));
+        if constexpr(sizeof...(Args) == 0u) {
+            return invoke(id, std::move(instance), static_cast<meta_any *>(nullptr), size_type{});
+        } else {
+            meta_any arguments[sizeof...(Args)]{{*ctx, std::forward<Args>(args)}...};
+            return invoke(id, std::move(instance), arguments, sizeof...(Args));
+        }
     }
 
     /**