D::name was unused

Author: Roy

include/boost/json/detail/value_to.hpp

@@ -372,13 +372,15 @@ value_to_impl(
 
         using Ds = described_members<T>;
         using D = boost::mp11::mp_first<Ds>;
-        
+        //This is to avoid the non used warning
+        (void)D::name;
+
         BOOST_JSON_INTRUSIVE_MESSAGE(
             std::format(
                 "while processing array {} in {}, found {} element expected {}",
                 D::name, BOOST_JSON_INTRUSIVE::composePath(),
                 arr->size(), N));
-        
+
         return {boost::system::in_place_error, ec};
     }