linear.h

Go to the documentation of this file.

// -*- C++ -*-

#if !defined(__ads_functor_Linear_h__)
#define __ads_functor_Linear_h__

#include "../defs.h"

#include <functional>

BEGIN_NAMESPACE_ADS

//-----------------------------------------------------------------------------
// @{

template<typename T>
class UnaryLinear : 
  public std::unary_function<T,T> {
private:

  //
  // Private types.
  //

  typedef std::unary_function<T,T> Base;

public:

  //
  //Public types.
  //

  typedef typename Base::argument_type argument_type;
  typedef typename Base::result_type result_type;

  //
  // Member data.
  //

  T a;
  T b;

  //
  // Constructors.
  //

  UnaryLinear(const T a_ = 0, const T b_ = 0) :
    a(a_),
    b(b_)
  {}

  // The default copy and assignment and destructor are fine.

  //
  // Functor.
  //

  result_type
  operator()(const argument_type& x) const {
    return a * x + b;
  }

};


template<typename T>
inline
UnaryLinear<T>
unary_linear(const T a, const T b) {
  return UnaryLinear<T>(a, b);
}


template<typename T>
inline
UnaryLinear<T>
unary_linear() {
  return UnaryLinear<T>();
}

// @}

END_NAMESPACE_ADS

#endif

---