some work on cache_restore

caching/hint_array.h

@@ -0,0 +1,31 @@
+#ifndef CACHE_HINT_ARRAY_H
+#define CACHE_HINT_ARRAY_H
+
+#include "persistent-data/data-structures/array.h"
+
+#include <string>
+
+//----------------------------------------------------------------
+
+namespace caching {
+	namespace hint_array_detail {
+		template <uint32_t WIDTH>
+		struct hint_traits {
+			typedef unsigned char byte;
+			typedef byte disk_type[WIDTH];
+			typedef std::string value_type;
+			typedef no_op_ref_counter<value_type> ref_counter;
+
+			static void unpack(disk_type const &disk, value_type &value);
+			static void pack(value_type const &value, disk_type &disk);
+		};
+
+		// FIXME: data visitor stuff
+	}
+
+//	typedef persistent_data::array<mapping_array_detail::hint_traits> hint_array;
+}
+
+//----------------------------------------------------------------
+
+#endif