Unify some template specializations

[stockfish] / src / position.h

diff --git a/src/position.h b/src/position.h
index c391d8247c72f4530d78d942a1d087eb1d472180..bcbfc850d0c8b15eb4677f63b447996fde6fdeca 100644 (file)
--- a/src/position.h
+++ b/src/position.h
@@ -342,29 +342,17 @@ inline Square Position::castle_rook_square(CastleRight f) const {
   return castleRookSquare[f];
 }
 
-template<>
-inline Bitboard Position::attacks_from<PAWN>(Square s, Color c) const {
-  return StepAttacksBB[make_piece(c, PAWN)][s];
-}
-
-template<PieceType Piece> // Knight and King and white pawns
+template<PieceType Pt>
 inline Bitboard Position::attacks_from(Square s) const {
-  return StepAttacksBB[Piece][s];
+  return  Pt == BISHOP ? bishop_attacks_bb(s, occupied_squares())
+        : Pt == ROOK   ? rook_attacks_bb(s, occupied_squares())
+        : Pt == QUEEN  ? attacks_from<ROOK>(s) | attacks_from<BISHOP>(s)
+                       : StepAttacksBB[Pt][s];
 }
 
 template<>
-inline Bitboard Position::attacks_from<BISHOP>(Square s) const {
-  return bishop_attacks_bb(s, occupied_squares());
-}
-
-template<>
-inline Bitboard Position::attacks_from<ROOK>(Square s) const {
-  return rook_attacks_bb(s, occupied_squares());
-}
-
-template<>
-inline Bitboard Position::attacks_from<QUEEN>(Square s) const {
-  return attacks_from<ROOK>(s) | attacks_from<BISHOP>(s);
+inline Bitboard Position::attacks_from<PAWN>(Square s, Color c) const {
+  return StepAttacksBB[make_piece(c, PAWN)][s];
 }
 
 inline Bitboard Position::attacks_from(Piece p, Square s) const {