--- a/src/types.h Sat Oct 19 02:33:08 2013 +0300 +++ b/src/types.h Tue Oct 22 13:40:16 2013 +0300 @@ -93,6 +93,8 @@ { return val (idx); } + bool operator== (const matrix& other) const; + private: double m_vals[9]; };