id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
5498	Issues with the Interval Library	dduffy@…	Boris Gubenko	"I am trying to compile some examples; in particular, the trigonometric, hyperbolic trig and transendental (exp, log!!)functions don't compile with default roudning policy (see file I included). It's a kind of show-stopper.

Some user requests as well are:

1. Instead of bool when comparing interval, use TriBool (a result can be _indeterminate_)

2. Interval is missing midpoint() (same as median()).

3. Interval analysis is highly specialised; more user examples would be very welcome.
I have the books by R.E. Moore but it takes some time to map his results to Interval.

best regards

Daniel


// Code

// TestInterval101.cpp
//
// Tests for Interval arithmetic.
//
// (C) Datasim Education BV 2009-2011

#include <boost/numeric/interval.hpp>


template<class T, class Policies>
std::ostream &operator<<(std::ostream &os,
                         const boost::numeric::interval<T, Policies> &x) {
  os << ""["" << x.lower() << "", "" << x.upper() << ""]"";
  return os;
}

typedef boost::numeric::interval<double> Range;



int main()
{

	using namespace boost::numeric;
 
	// Create and manipulate some numbers.
	Range r1(0.0, 1,0);

	Range r2(-10.0, 20.0); 
	Range r3(20.8, 44.9);

	double t = 2.0;
	r1 += t; r1 -= t; r1 *= t; r1 /= t;

	Range rTmp(2.0, 3.0);
	r1 += rTmp; r1 -= rTmp; r1 *= rTmp; r1 /= rTmp;

	// Numeric operations.
	Range r4 = r1 + r2;
	Range r5 = r1 - r2;
	Range r6 = r1 * r2;
	Range r7 = r1 / r2;

	// More numeric operations.
	t = 3.0;
	r4 = r1 + t;
	r5 = r1 - t;
	r6 = r1 * t;
	r7 = r1 / t;

	// Algebraic functions.
	r4 = abs(r1);
	r5 = sqrt(r2);
	r6 = square(r3);
	r7 = pow(r1, 2);	// r1^2
	Range r8 = nth_root(r1, 4);

	// NONE COMPILES
	// Transcendental functions
//	r4 = exp(r1); 
//	boost::numeric::interval<double, boost::numeric::interval_lib::default_policies<double> > myI;
//	myI = boost::numeric::exp(myI);
	//r5 = log(r2);

	// Trigonometric functions
/*	r4 = sin(r1);
	r5 = cos(r1);
	r6 = tan(r1);
	r7 = asin(r2);
	r7 = acos(r2);
	r7 = atan(r2);

	// Hyperbolic trigonometric functions
	r4 = sinh(r1);
	r5 = cosh(r1);
	r6 = tanh(r1);
	r7 = asinh(r2);
	r8 = acosh(r2);
	r6 = atanh(r2);*/


	

	return 0;
}
"	Bugs	new	Boost 1.46.0	interval	Boost 1.46.0	Problem		Interval