InvertedBoard invert() const;
int distance(const Board& o) const;
int distance(const InvertedBoard& invo) const;
+ bool operator==(const Board& o) const;
+ bool operator!=(const Board& o) const;
};
std::istream& operator>>(std::istream& is, Board& board);
std::ostream& operator<<(std::ostream& os, const Board& board);
std::vector<Step*> successors(std::shared_ptr<Step> shared_this);
static signed char adjacent[BOARD_SIZE][5];
};
+std::ostream& operator<<(std::ostream& os, const Step& step);
#endif /* _SLIDING_TILE_LIB_H */