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#ifndef __INCLUDED_SUDOKUSOLVER_CELL__
#define __INCLUDED_SUDOKUSOLVER_CELL__
class Cell {
public:
/**
* @brief default constructor
* */
Cell();
/**
* @brief copy constructor
* */
Cell(const Cell & other);
/**
* @brief assignment operator
* */
void assign(const Cell & other);
// inspectors
/**
* @brief return true if a given value is a valid possibility for this cell
* */
inline int possibility(const int value) { return cell_possibility[value]; }
/**
* @brief return true of the current value for this cell is a valid possibility
* */
// FIXME the bool valid() should be replaced with a state() enum to indicate
// the difference between Input Error and Invalid Values
inline bool valid() const { return cell_valid; }
/**
* @brief return the current value for this cell
* */
inline int value() const { return cell_value; }
// mutators
/**
* @brief set wether or not the given value is a valid possibility for a this cell
* */
void set_possibility(int value, bool possible = true);
/**
* @brief set wether or not this cell is valid
* */
void set_valid(bool valid);
/**
* @brief set the value for this cell
* */
void set_value(int value);
private:
bool cell_possibility[9];
bool cell_valid;
int cell_value;
};
#endif // __INCLUDED_SUDOKUSOLVER_CELL__
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