bounds.h

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#ifndef IFOPT_INCLUDE_OPT_BOUNDS_H_
#define IFOPT_INCLUDE_OPT_BOUNDS_H_

namespace ifopt {

struct Bounds {
  Bounds(double lower = 0.0, double upper = 0.0)
  {
    lower_ = lower;
    upper_ = upper;
  }

  double lower_;
  double upper_;

  void operator+=(double scalar)
  {
    lower_ += scalar;
    upper_ += scalar;
  }

  void operator-=(double scalar)
  {
    lower_ -= scalar;
    upper_ -= scalar;
  }
};

// settings this as signals infinity for IPOPT/SNOPT solvers
static const double inf = 1.0e20;

static const Bounds NoBound          = Bounds(-inf, +inf);
static const Bounds BoundZero        = Bounds( 0.0,  0.0);
static const Bounds BoundGreaterZero = Bounds( 0.0, +inf);
static const Bounds BoundSmallerZero = Bounds(-inf,  0.0);

} // namespace opt

#endif /* IFOPT_INCLUDE_OPT_BOUNDS_H_ */