[Boost-users] exp functions with interval

From: Mark Beinker (mark.beinker_at_[hidden])
Date: 2007-10-07 15:42:51

Hi,

I was trying to use the boost interval class using g++ under cygwin and
ubuntu, but unfortunately, I have trouble to use the exp function.

The following code:

#include <iostream>
#include <cmath>
#include <boost/numeric/interval.hpp>

#define DOUBLE boost::numeric::interval<double>

int main(int argc, char** argv)
{
  DOUBLE x(4,5);

  std::cout.precision(19);

  DOUBLE res = exp(x);

  std::cout<<'['<<res.lower()<<", "<<res.upper()<<']'<<std::endl;

  return 0;
}

generates the following compile error:

/usr/include/boost/numeric/interval/transc.hpp: In function
`boost::numeric::interval<T, Policies> boost::numeric::exp(const
boost::numeric::interval<T, Policies>&) [with T = double, Policies =
boost::numeric::interval_lib::policies<boost::numeric::interval_lib::rounded_math<double>, boost::numeric::interval_lib::checking_strict<double> >]':
itest.cpp:14:   instantiated from here
/usr/include/boost/numeric/interval/transc.hpp:34: error: 'struct
boost::numeric::interval_lib::rounded_math<double>' has no member named
'exp_down'
itest.cpp:14:   instantiated from here
/usr/include/boost/numeric/interval/transc.hpp:34: error: 'struct
boost::numeric::interval_lib::rounded_math<double>' has no member named
'exp_up'

I use boost version 1.34.1. 
Any idea why this doesn't work?

Regards,

Mark