template<class T> struct PCursor;
template<class T> struct Link;
template<class T> struct Handle ;
+template<class T>struct Interval_t ;
+#include "real.hh"
+typedef Interval_t<Real> Interval;
struct Choleski_decomposition ;
-struct Interval ;
+
struct long_option_init ;
struct Getopt_long ;
struct Matrix ;