reorganize

src/history.h

@@ -96,13 +96,27 @@ class StatsEntry {
 };
 
 template<typename T, std::size_t Size, std::size_t... Sizes>
-struct MultiArrayHelper;
+class MultiArray;
+
+namespace Detail {
+
+template<typename T, std::size_t Size, std::size_t... Sizes>
+struct MultiArrayHelper {
+    using child_type = MultiArray<T, Sizes...>;
+};
+
+template<typename T, std::size_t Size>
+struct MultiArrayHelper<T, Size> {
+    using child_type = T;
+};
+
+}
 
 // MultiArray is a generic N-dimensional array used by various statistics.
 // The template parameters (Size and Sizes) encode the dimensions of the array.
 template<typename T, std::size_t Size, std::size_t... Sizes>
 class MultiArray {
-    using child_type = typename MultiArrayHelper<T, Size, Sizes...>::child_type;
+    using child_type = typename Detail::MultiArrayHelper<T, Size, Sizes...>::child_type;
     using array_type = std::array<child_type, Size>;
     array_type data;
 
@@ -132,16 +146,6 @@ class MultiArray {
     }
 };
 
-template<typename T, std::size_t Size, std::size_t... Sizes>
-struct MultiArrayHelper {
-    using child_type = MultiArray<T, Sizes...>;
-};
-
-template<typename T, std::size_t Size>
-struct MultiArrayHelper<T, Size> {
-    using child_type = T;
-};
-
 enum StatsType {
     NoCaptures,
     Captures
@@ -191,6 +195,8 @@ enum CorrHistType {
 
 using CorrHistEntry = StatsEntry<std::int16_t, CORRECTION_HISTORY_LIMIT>;
 
+namespace Detail {
+
 template<CorrHistType _>
 struct CorrHistTypedef {
     using type = MultiArray<CorrHistEntry, COLOR_NB, CORRECTION_HISTORY_SIZE>;
@@ -206,8 +212,10 @@ struct CorrHistTypedef<Continuation> {
     using type = MultiArray<CorrHistTypedef<PieceTo>::type, PIECE_NB, SQUARE_NB>;
 };
 
+}
+
 template<CorrHistType T>
-using CorrectionHistory = typename CorrHistTypedef<T>::type;
+using CorrectionHistory = typename Detail::CorrHistTypedef<T>::type;
 
 }  // namespace Stockfish