Update DataColumn classes

morzhovets · Jul 15, 2024 · d01fd61 · d01fd61
1 parent d4207e2
commit d01fd61
Showing 1 changed file with 10 additions and 2 deletions.
diff --git a/include/momo/DataColumn.h b/include/momo/DataColumn.h
@@ -58,7 +58,7 @@ enum class DataColumnCodeOffset : size_t
 };
 
 template<>
-struct HashCoder<DataColumnCodeOffset, size_t>	// c++11
+struct HashCoder<DataColumnCodeOffset, size_t>	// gcc 4.9, clang 3.6
 {
 	size_t operator()(const DataColumnCodeOffset& key) const noexcept
 	{
@@ -107,6 +107,12 @@ namespace internal
 		typedef typename TColumn::Item Item;
 	};
 
+	template<typename TItem, typename TStruct>
+	struct DataColumnItemSelector<TItem TStruct::*>
+	{
+		typedef TItem Item;	//?
+	};
+
 	template<typename TStruct, typename TCode>
 	class DataColumnInfoBase
 	{
@@ -561,7 +567,9 @@ class DataColumnInfoNative : public internal::DataColumnInfoBase<TStruct, DataCo
 	typedef internal::DataColumnInfoBase<TStruct, DataColumnCodeOffset> ColumnInfoBase;
 
 public:
-	using typename ColumnInfoBase::Struct;
+	typedef TStruct Struct;
+	//using typename ColumnInfoBase::Struct;	// vs2017
+
 	using typename ColumnInfoBase::Code;
 
 	template<typename Item>