[max] Attribute message with no argument: unset it

celtera · Feb 28, 2024 · b2062a4 · b2062a4
1 parent 2304952
commit b2062a4
Showing 1 changed file with 12 additions and 4 deletions.
diff --git a/include/avnd/binding/max/attributes_setup.hpp b/include/avnd/binding/max/attributes_setup.hpp
@@ -54,11 +54,10 @@ struct attribute_register<Processor, T>
   template<std::size_t I>
   static t_max_err setter(Processor *x, void*, long ac, t_atom *av)
   {
+    auto& obj = x->implementation.effect;
+    auto& ins = avnd::get_inputs(obj);
+    auto& field = avnd::input_introspection<T>::template field<I>(ins);
     if (ac && av) {
-      auto& obj = x->implementation.effect;
-      auto& ins = avnd::get_inputs(obj);
-      auto& field = avnd::input_introspection<T>::template field<I>(ins);
-
       if(from_atoms{ac, av}(field.value))
       {
         if constexpr(requires { field.update(obj); })
@@ -67,6 +66,15 @@ struct attribute_register<Processor, T>
         }
       }
     }
+    else
+    {
+      // attribute name without argument: unset it
+      field.value = {};
+      if constexpr(requires { field.update(obj); })
+      {
+        field.update(obj);
+      }
+    }
     return MAX_ERR_NONE;
   }