Standardize Comments

[stockfish] / src / movegen.cpp

diff --git a/src/movegen.cpp b/src/movegen.cpp
index 255dce04c3c136d0e836d62de22a37d873f05f90..82ad60613c2513f0374bf01db25ef63debf4b26f 100644 (file)
--- a/src/movegen.cpp
+++ b/src/movegen.cpp
@@ -16,22 +16,33 @@
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+#include "movegen.h"
+
 #include <cassert>
+#include <initializer_list>
 
-#include "movegen.h"
+#include "bitboard.h"
 #include "position.h"
 
 namespace Stockfish {
 
 namespace {
 
-  template<GenType Type, Direction D>
+  template<GenType Type, Direction D, bool Enemy>
   ExtMove* make_promotions(ExtMove* moveList, [[maybe_unused]] Square to) {
 
     if constexpr (Type == CAPTURES || Type == EVASIONS || Type == NON_EVASIONS)
+    {
         *moveList++ = make<PROMOTION>(to - D, to, QUEEN);
+        if constexpr (Enemy && Type == CAPTURES)
+        {
+            *moveList++ = make<PROMOTION>(to - D, to, ROOK);
+            *moveList++ = make<PROMOTION>(to - D, to, BISHOP);
+            *moveList++ = make<PROMOTION>(to - D, to, KNIGHT);
+        }
+    }
 
-    if constexpr (Type == QUIETS || Type == EVASIONS || Type == NON_EVASIONS)
+    if constexpr ((Type == QUIETS && !Enemy) || Type == EVASIONS || Type == NON_EVASIONS)
     {
         *moveList++ = make<PROMOTION>(to - D, to, ROOK);
         *moveList++ = make<PROMOTION>(to - D, to, BISHOP);
@@ -106,13 +117,13 @@ namespace {
             b3 &= target;
 
         while (b1)
-            moveList = make_promotions<Type, UpRight>(moveList, pop_lsb(b1));
+            moveList = make_promotions<Type, UpRight, true>(moveList, pop_lsb(b1));
 
         while (b2)
-            moveList = make_promotions<Type, UpLeft >(moveList, pop_lsb(b2));
+            moveList = make_promotions<Type, UpLeft, true>(moveList, pop_lsb(b2));
 
         while (b3)
-            moveList = make_promotions<Type, Up     >(moveList, pop_lsb(b3));
+            moveList = make_promotions<Type, Up,    false>(moveList, pop_lsb(b3));
     }
 
     // Standard and en passant captures
@@ -223,19 +234,20 @@ namespace {
 } // namespace
 
 
-/// <CAPTURES>     Generates all pseudo-legal captures plus queen promotions
-/// <QUIETS>       Generates all pseudo-legal non-captures and underpromotions
-/// <EVASIONS>     Generates all pseudo-legal check evasions when the side to move is in check
-/// <QUIET_CHECKS> Generates all pseudo-legal non-captures giving check, except castling and promotions
-/// <NON_EVASIONS> Generates all pseudo-legal captures and non-captures
-///
-/// Returns a pointer to the end of the move list.
+// <CAPTURES>     Generates all pseudo-legal captures plus queen promotions
+// <QUIETS>       Generates all pseudo-legal non-captures and underpromotions
+// <EVASIONS>     Generates all pseudo-legal check evasions
+// <NON_EVASIONS> Generates all pseudo-legal captures and non-captures
+// <QUIET_CHECKS> Generates all pseudo-legal non-captures giving check,
+//                except castling and promotions
+//
+// Returns a pointer to the end of the move list.
 
 template<GenType Type>
 ExtMove* generate(const Position& pos, ExtMove* moveList) {
 
   static_assert(Type != LEGAL, "Unsupported type in generate()");
-  assert((Type == EVASIONS) == (bool)pos.checkers());
+  assert((Type == EVASIONS) == bool(pos.checkers()));
 
   Color us = pos.side_to_move();
 
@@ -251,7 +263,7 @@ template ExtMove* generate<QUIET_CHECKS>(const Position&, ExtMove*);
 template ExtMove* generate<NON_EVASIONS>(const Position&, ExtMove*);
 
 
-/// generate<LEGAL> generates all the legal moves in the given position
+// generate<LEGAL> generates all the legal moves in the given position
 
 template<>
 ExtMove* generate<LEGAL>(const Position& pos, ExtMove* moveList) {