X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fbitboard.h;h=6f99ef1953bf9fe702e16731fdd13915359eec29;hp=b1d961f4d9fc2b018a9084e66510004b7594a779;hb=f21b50398231b4846c364e23bfeeab314c7731ea;hpb=f98c77413b68d506977bc078de7a47455968a926

diff --git a/src/bitboard.h b/src/bitboard.h
index b1d961f4..6f99ef19 100644
--- a/src/bitboard.h
+++ b/src/bitboard.h
@@ -237,15 +237,13 @@ inline bool aligned(Square s1, Square s2, Square s3) {
 
 
 /// distance() functions return the distance between x and y, defined as the
-/// number of steps for a king in x to reach y. Works with squares, ranks, files.
+/// number of steps for a king in x to reach y.
 
-template<typename T> inline int distance(T x, T y) { return std::abs(x - y); }
+template<typename T1 = Square> inline int distance(Square x, Square y);
+template<> inline int distance<File>(Square x, Square y) { return std::abs(file_of(x) - file_of(y)); }
+template<> inline int distance<Rank>(Square x, Square y) { return std::abs(rank_of(x) - rank_of(y)); }
 template<> inline int distance<Square>(Square x, Square y) { return SquareDistance[x][y]; }
 
-template<typename T1, typename T2> inline int distance(T2 x, T2 y);
-template<> inline int distance<File>(Square x, Square y) { return distance(file_of(x), file_of(y)); }
-template<> inline int distance<Rank>(Square x, Square y) { return distance(rank_of(x), rank_of(y)); }
-
 template<class T> constexpr const T& clamp(const T& v, const T& lo, const T&  hi) {
   return v < lo ? lo : v > hi ? hi : v;
 }