\begin{ccRefFunction}{x_equal}

\ccFunction{bool x_equal(const Point_2<R> &p,
                         const Point_2<R> &q);}
         {returns \ccStyle{true}, iff \ccStyle{p} and \ccStyle{q}
	  have the same \ccStyle{x}-coordinate.}

\ccFunction{bool x_equal(const Point_3<R> &p,
                         const Point_3<R> &q);}
         {returns \ccStyle{true}, iff \ccStyle{p} and \ccStyle{q}
	  have the same \ccStyle{x}-coordinate.}
\end{ccRefFunction}