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//-----------------------------------------------------------------------------
/** @file libpentobi_base/PointState.h
@author Markus Enzenberger
@copyright GNU General Public License version 3 or later */
//-----------------------------------------------------------------------------
#ifndef LIBPENTOBI_BASE_POINT_STATE_H
#define LIBPENTOBI_BASE_POINT_STATE_H
#include "Color.h"
namespace libpentobi_base {
//-----------------------------------------------------------------------------
/** State of an on-board point, which can be a color or empty */
class PointState
{
public:
using IntType = Color::IntType;
static constexpr IntType range = Color::range + 1;
static constexpr IntType value_empty = range - 1;
static PointState empty() { return PointState(value_empty); }
PointState();
explicit PointState(Color c) { m_i = c.to_int(); }
explicit PointState(IntType i);
bool operator==(PointState s) const { return m_i == s.m_i; }
bool operator!=(PointState s) const { return ! operator==(s); }
bool operator==(Color c) const { return m_i == c.to_int(); }
bool operator!=(Color c) const { return ! operator==(c); }
IntType to_int() const;
bool is_empty() const;
bool is_color() const;
Color to_color() const;
private:
static constexpr IntType value_uninitialized = range;
IntType m_i;
#ifdef LIBBOARDGAME_DEBUG
bool is_initialized() const { return m_i < value_uninitialized; }
#endif
};
inline PointState::PointState()
{
#ifdef LIBBOARDGAME_DEBUG
m_i = value_uninitialized;
#endif
}
inline PointState::PointState(IntType i)
{
LIBBOARDGAME_ASSERT(i < range);
m_i = i;
}
inline bool PointState::is_color() const
{
LIBBOARDGAME_ASSERT(is_initialized());
return m_i != value_empty;
}
inline bool PointState::is_empty() const
{
LIBBOARDGAME_ASSERT(is_initialized());
return m_i == value_empty;
}
inline Color PointState::to_color() const
{
LIBBOARDGAME_ASSERT(is_color());
return Color(m_i);
}
inline PointState::IntType PointState::to_int() const
{
LIBBOARDGAME_ASSERT(is_initialized());
return m_i;
}
//-----------------------------------------------------------------------------
} // namespace libpentobi_base
#endif // LIBPENTOBI_BASE_POINT_STATE_H
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