Fixed compilation errors.

src/nnue/features/p.h

@@ -22,9 +22,9 @@ class P {
   // Hash value embedded in the evaluation function file
   static constexpr std::uint32_t kHashValue = 0x764CFB4Bu;
   // number of feature dimensions
-  static constexpr IndexType kDimensions = PieceSquare::PS_END;
+  static constexpr IndexType kDimensions = PS_END;
   // The maximum value of the number of indexes whose value is 1 at the same time among the feature values
-  static constexpr IndexType kMaxActiveDimensions = PieceId::PIECE_ID_KING;
+  static constexpr IndexType kMaxActiveDimensions = 30; // Kings don't count
   // Timing of full calculation instead of difference calculation
   static constexpr TriggerEvent kRefreshTrigger = TriggerEvent::kNone;
 
@@ -35,6 +35,10 @@ class P {
   // Get a list of indices whose values ​​have changed from the previous one in the feature quantity
   static void AppendChangedIndices(const Position& pos, Color perspective,
                                    IndexList* removed, IndexList* added);
+
+ private:
+  // Index of a feature for a given piece on some square
+  static IndexType MakeIndex(Color perspective, Square s, Piece pc);
 };
 
 }  // namespace Features