move is_metadata trait to soa

Author: aalkin

Framework/Core/include/Framework/ASoA.h

@@ -231,9 +231,6 @@ struct TableMetadata {
   }
 };
 
-template <typename T>
-concept is_metadata = framework::base_of_template<TableMetadata, T>;
-
 template <typename D>
 struct MetadataTrait {
   using metadata = void;
@@ -378,14 +375,17 @@ using SelectionVector = std::vector<int64_t>;
 template <typename T>
 concept has_parent_t = not_void<typename T::parent_t>;
 
+template <typename T>
+concept is_metadata = framework::base_of_template<aod::TableMetadata, T>;
+
 template <typename T>
 concept is_metadata_trait = framework::specialization_of_template<aod::MetadataTrait, T>;
 
 template <typename T>
 concept has_metadata = is_metadata_trait<T> && not_void<typename T::metadata>;
 
 template <typename T>
-concept has_extension = aod::is_metadata<T> && not_void<typename T::extension_table_t>;
+concept has_extension = is_metadata<T> && not_void<typename T::extension_table_t>;
 
 template <typename T>
 concept is_spawnable_column = std::same_as<typename T::spawnable_t, std::true_type>;

Framework/Core/include/Framework/AnalysisHelpers.h

@@ -192,7 +192,7 @@ struct ProducesGroup {
 };
 
 /// Helper template for table transformations
-template <o2::aod::is_metadata M, soa::TableRef Ref>
+template <soa::is_metadata M, soa::TableRef Ref>
 struct TableTransform {
   using metadata = M;
   constexpr static auto sources = M::sources;