#define ENDGAME_H_INCLUDED
#include <map>
+#include <memory>
#include <string>
+#include <type_traits>
+#include <utility>
#include "position.h"
#include "types.h"
/// Endgame functions can be of two types depending on whether they return a
-/// Value or a ScaleFactor. Type eg_fun<int>::type returns either ScaleFactor
-/// or Value depending on whether the template parameter is 0 or 1.
-
-template<int> struct eg_fun { typedef Value type; };
-template<> struct eg_fun<1> { typedef ScaleFactor type; };
+/// Value or a ScaleFactor.
+template<EndgameType E> using
+eg_type = typename std::conditional<(E < SCALING_FUNCTIONS), Value, ScaleFactor>::type;
/// Base and derived templates for endgame evaluation and scaling functions
};
-template<EndgameType E, typename T = typename eg_fun<(E > SCALING_FUNCTIONS)>::type>
+template<EndgameType E, typename T = eg_type<E>>
struct Endgame : public EndgameBase<T> {
explicit Endgame(Color c) : strongSide(c), weakSide(~c) {}
T operator()(const Position&) const;
private:
- const Color strongSide, weakSide;
+ Color strongSide, weakSide;
};
class Endgames {
- typedef std::map<Key, EndgameBase<eg_fun<0>::type>*> M1;
- typedef std::map<Key, EndgameBase<eg_fun<1>::type>*> M2;
+ template<typename T> using Map = std::map<Key, std::unique_ptr<EndgameBase<T>>>;
- M1 m1;
- M2 m2;
+ template<EndgameType E, typename T = eg_type<E>>
+ void add(const std::string& code);
- M1& map(M1::mapped_type) { return m1; }
- M2& map(M2::mapped_type) { return m2; }
+ template<typename T>
+ Map<T>& map() {
+ return std::get<std::is_same<T, ScaleFactor>::value>(maps);
+ }
- template<EndgameType E> void add(const std::string& code);
+ std::pair<Map<Value>, Map<ScaleFactor>> maps;
public:
Endgames();
- ~Endgames();
- template<typename T> T probe(Key key, T& eg) {
- return eg = map(eg).count(key) ? map(eg)[key] : NULL;
+ template<typename T>
+ EndgameBase<T>* probe(Key key) {
+ return map<T>().count(key) ? map<T>()[key].get() : nullptr;
}
};