X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Ftypes.h;h=6d2c09a6010be13631c3fb36ac6e9c571a05b429;hp=c77d804037ee7a094b54843b1482801baa2c6aed;hb=d232a4ae684eccd829fd703a1872c1e0e17aaee9;hpb=defa1ccaa9c145b0ccff38a1ae660c052d753e81

diff --git a/src/types.h b/src/types.h
index c77d8040..6d2c09a6 100644
--- a/src/types.h
+++ b/src/types.h
@@ -43,6 +43,7 @@
 #include <climits>
 #include <cstdint>
 #include <cstdlib>
+#include <algorithm>
 
 #if defined(_MSC_VER)
 // Disable some silly and noisy warning from MSVC compiler
@@ -358,14 +359,14 @@ constexpr Square operator~(Square s) {
   return Square(s ^ SQ_A8); // Vertical flip SQ_A1 -> SQ_A8
 }
 
-constexpr File operator~(File f) {
-  return File(f ^ FILE_H); // Horizontal flip FILE_A -> FILE_H
-}
-
 constexpr Piece operator~(Piece pc) {
   return Piece(pc ^ 8); // Swap color of piece B_KNIGHT -> W_KNIGHT
 }
 
+inline File map_to_queenside(File f) {
+  return std::min(f, File(FILE_H - f)); // Map files ABCDEFGH to files ABCDDCBA
+}
+
 constexpr CastlingRights operator&(Color c, CastlingRights cr) {
   return CastlingRights((c == WHITE ? WHITE_CASTLING : BLACK_CASTLING) & cr);
 }