StateInfo is usually allocated on the stack by search()

[stockfish] / src / position.h

diff --git a/src/position.h b/src/position.h
index 1070236be818ffbad0e07e214f5aa443ef2c3234..d44ed009e5d2405d8cb0826241b936724e6df488 100644 (file)
--- a/src/position.h
+++ b/src/position.h
@@ -23,7 +23,9 @@
 
 #include <cassert>
 #include <cstddef>  // For offsetof()
+#include <memory>   // For std::unique_ptr
 #include <string>
+#include <vector>
 
 #include "bitboard.h"
 #include "types.h"
@@ -75,6 +77,8 @@ struct StateInfo {
   StateInfo* previous;
 };
 
+typedef std::unique_ptr<std::vector<StateInfo>> StateListPtr;
+
 
 /// Position class stores information regarding the board representation as
 /// pieces, side to move, hash keys, castling info, etc. Important methods are
@@ -86,14 +90,12 @@ class Position {
 public:
   static void init();
 
-  Position() = default; // To define the global object RootPos
+  Position() = default;
   Position(const Position&) = delete;
-  Position(const Position& pos, Thread* th) { *this = pos; thisThread = th; }
-  Position(const std::string& f, bool c960, Thread* th) { set(f, c960, th); }
-  Position& operator=(const Position&); // To assign RootPos from UCI
+  Position& operator=(const Position&) = delete;
 
   // FEN string input/output
-  void set(const std::string& fenStr, bool isChess960, Thread* th);
+  Position& set(const std::string& fenStr, bool isChess960, StateInfo* si, Thread* th);
   const std::string fen() const;
 
   // Position representation
@@ -178,7 +180,6 @@ public:
 
 private:
   // Initialization helpers (used while setting up a position)
-  void clear();
   void set_castling_right(Color c, Square rfrom);
   void set_state(StateInfo* si) const;
 
@@ -200,7 +201,6 @@ private:
   int castlingRightsMask[SQUARE_NB];
   Square castlingRookSquare[CASTLING_RIGHT_NB];
   Bitboard castlingPath[CASTLING_RIGHT_NB];
-  StateInfo startState;
   uint64_t nodes;
   int gamePly;
   Color sideToMove;