id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
725	floating point comparison algorithm	nobody	Gennadiy Rozental	"{{{
The floating point comparison algorithm does not seem 
to work if one of the floating points is zero and the 
other one is close to zero. Here's the code sample 
I've used:

close_at_tolerance<double> checker(0.01);

const double a = 0.0;
const double b = 0.0000001;

bool res = checker(a, b);
if (!res)
{
  std::cerr << ""ERROR"" << std::endl;
}

I think the following check must be added in the 
close_at_tolerance<FPT>::operator() function:
bool operator()( FPT left, FPT right ) const
{
   if (left == 0.0 || right == 0.0)
   {
      return (p_fraction_tolerance.get() >  
              tt_detail::fpt_abs(left-right));
   }

   // ...
}

My email address is ""tom.vanroey@vito.be"".

}}}"	Bugs	closed		test	None		Invalid