[Boost-bugs] [Boost C++ Libraries] #5498: Issues with the Interval Library

Subject: [Boost-bugs] [Boost C++ Libraries] #5498: Issues with the Interval Library
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-04-23 09:11:20

#5498: Issues with the Interval Library
-------------------------------+--------------------------------------------
 Reporter:  dduffy@…           |       Owner:  bgubenko   
     Type:  Bugs               |      Status:  new        
Milestone:  Boost 1.46.0       |   Component:  interval   
  Version:  Boost 1.46.0       |    Severity:  Showstopper
 Keywords:  Interval           |  
-------------------------------+--------------------------------------------
 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;
 }

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5498>
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