X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmovegen.h;h=3f895f05ad481bdf9e092bfdd7ff814de906ad51;hp=9ea4cec93d5006b2769a01da049c381e5c501885;hb=HEAD;hpb=13a73f67c018e58b2fd46f886c45ef2b75188c8e

diff --git a/src/movegen.h b/src/movegen.h
index 9ea4cec9..9a39d1c5 100644
--- a/src/movegen.h
+++ b/src/movegen.h
@@ -1,7 +1,6 @@
 /*
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
-  Copyright (C) 2008-2013 Marco Costalba, Joona Kiiski, Tord Romstad
+  Copyright (C) 2004-2023 The Stockfish developers (see AUTHORS file)
 
   Stockfish is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -20,39 +19,58 @@
 #ifndef MOVEGEN_H_INCLUDED
 #define MOVEGEN_H_INCLUDED
 
+#include <algorithm>  // IWYU pragma: keep
+#include <cstddef>
+
 #include "types.h"
 
+namespace Stockfish {
+
+class Position;
+
 enum GenType {
-  CAPTURES,
-  QUIETS,
-  QUIET_CHECKS,
-  EVASIONS,
-  NON_EVASIONS,
-  LEGAL
+    CAPTURES,
+    QUIETS,
+    QUIET_CHECKS,
+    EVASIONS,
+    NON_EVASIONS,
+    LEGAL
 };
 
-class Position;
+struct ExtMove {
+    Move move;
+    int  value;
+
+    operator Move() const { return move; }
+    void operator=(Move m) { move = m; }
+
+    // Inhibit unwanted implicit conversions to Move
+    // with an ambiguity that yields to a compile error.
+    operator float() const = delete;
+};
+
+inline bool operator<(const ExtMove& f, const ExtMove& s) { return f.value < s.value; }
 
 template<GenType>
-ExtMove* generate(const Position& pos, ExtMove* mlist);
+ExtMove* generate(const Position& pos, ExtMove* moveList);
 
-/// The MoveList struct is a simple wrapper around generate(). It sometimes comes
-/// in handy to use this class instead of the low level generate() function.
+// The MoveList struct wraps the generate() function and returns a convenient
+// list of moves. Using MoveList is sometimes preferable to directly calling
+// the lower level generate() function.
 template<GenType T>
 struct MoveList {
 
-  explicit MoveList(const Position& pos) : cur(mlist), last(generate<T>(pos, mlist)) { last->move = MOVE_NONE; }
-  void operator++() { ++cur; }
-  Move operator*() const { return cur->move; }
-  size_t size() const { return last - mlist; }
-  bool contains(Move m) const {
-    for (const ExtMove* it(mlist); it != last; ++it) if (it->move == m) return true;
-    return false;
-  }
-
-private:
-  ExtMove mlist[MAX_MOVES];
-  ExtMove *cur, *last;
+    explicit MoveList(const Position& pos) :
+        last(generate<T>(pos, moveList)) {}
+    const ExtMove* begin() const { return moveList; }
+    const ExtMove* end() const { return last; }
+    size_t         size() const { return last - moveList; }
+    bool           contains(Move move) const { return std::find(begin(), end(), move) != end(); }
+
+   private:
+    ExtMove moveList[MAX_MOVES], *last;
 };
 
-#endif // #ifndef MOVEGEN_H_INCLUDED
+}  // namespace Stockfish
+
+#endif  // #ifndef MOVEGEN_H_INCLUDED