1 files changed, 35 insertions, 0 deletions
diff --git a/libdbpp/selectcommandUtil.impl.h b/libdbpp/selectcommandUtil.impl.h
new file mode 100644
index 0000000..26ff1b7
--- /dev/null
+++ b/libdbpp/selectcommandUtil.impl.h
@@ -0,0 +1,35 @@
+#ifndef DB_SELECTCOMMANDUTIL_IMPL_H
+#define DB_SELECTCOMMANDUTIL_IMPL_H
+
+#include "selectcommand.h"
+#include <boost/function.hpp>
+#include <boost/utility/enable_if.hpp>
+
+namespace DB {
+	template<typename Fields, typename Func, unsigned int field, typename ... Fn>
+	inline typename boost::disable_if_c<field < std::tuple_size<Fields>::value>::type
+	forEachField(DB::SelectCommand *, const Func & func, const Fn & ... args)
+	{
+		func(args...);
+	}
+
+	template<typename Fields, typename Func, unsigned int field, typename ... Fn, typename ... Args>
+	inline typename boost::enable_if_c<field < std::tuple_size<Fields>::value>::type
+	forEachField(DB::SelectCommand * sel, const Func & func, const Args & ... args)
+	{
+		typename std::tuple_element<field, Fields>::type a;
+		(*sel)[field] >> a;
+		forEachField<Fields, Func, field + 1, Fn...>(sel, func, args..., a);
+	}
+
+	template<typename ... Fn, typename Func>
+	inline void SelectCommand::forEachRow(const Func & func)
+	{
+		while (fetch()) {
+			forEachField<std::tuple<Fn...>, Func, 0>(this, func);
+		}
+	}
+}
+
+#endif
+