Endgame's apply() method can be 'const'

[stockfish] / src / endgame.h

diff --git a/src/endgame.h b/src/endgame.h
index 7ea4a1388b0d886921618fde35fbf2b894d23670..b8fb7e82dbd82c60e7025544609544840fb50d7b 100644 (file)
--- a/src/endgame.h
+++ b/src/endgame.h
@@ -68,7 +68,7 @@ class EndgameFunctionBase {
 public:
   EndgameFunctionBase(Color c) : strongerSide(c), weakerSide(opposite_color(c)) {}
   virtual ~EndgameFunctionBase() {}
-  virtual T apply(const Position&) = 0;
+  virtual T apply(const Position&) const = 0;
   Color color() const { return strongerSide; }
 
 protected:
@@ -85,14 +85,14 @@ template<EndgameType>
 struct EvaluationFunction : public EndgameEvaluationFunctionBase {
   typedef EndgameEvaluationFunctionBase Base;
   explicit EvaluationFunction(Color c): EndgameEvaluationFunctionBase(c) {}
-  Value apply(const Position&);
+  Value apply(const Position&) const;
 };
 
 template<EndgameType>
 struct ScalingFunction : public EndgameScalingFunctionBase {
   typedef EndgameScalingFunctionBase Base;
   explicit ScalingFunction(Color c) : EndgameScalingFunctionBase(c) {}
-  ScaleFactor apply(const Position&);
+  ScaleFactor apply(const Position&) const;
 };