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:
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;
};