JLimits.cc

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#include <iostream>
#include <iomanip>
#include <limits>
 
#include "JMath/JLimits.hh"
 
#include "Jeep/JParser.hh"
#include "Jeep/JMessage.hh"
 
 
namespace {
 
  static const double A_MIN = -999.0;
  static const double A_MAX = +999.0;
  
  struct __A__ {
    /**
     * Constructor.
     *
     * \param  a             value
     */
    __A__(double a)
    {
      this->a = a;
    }
 
    /**
     * Equals operator.
     *
     * \param  first         first  value
     * \param  second        second value
     * \return               true if first and second value are equal; else false
     */
    friend inline bool operator==(const __A__& first, const __A__& second)
    {
      return first.a == second.a;
    }
 
    /**
     * Write object to output.
     *
     * \param  out           output stream
     * \param  object        object
     * \return               output stream
     */
    friend inline std::ostream& operator<<(std::ostream& out, const __A__& object)
    {
      return out << object.a;
    }
 
    static __A__ min() { return __A__(A_MIN); }
    static __A__ max() { return __A__(A_MAX); }
 
  protected:
    double a;
  };
 
 
  /**
   * Print class and zero value.
   *
   * \param  out           output stream
   * \param  name          class name
   */
  template<class T>
  inline void print(std::ostream& out, const char* name)
  {
    using namespace std;
    using namespace JPP;
    
    out << setw(12) << left << name << ' ' << JLimits<T>::min() << ' ' << JLimits<T>::max() << endl;
  }
 
#define PRINT(OUT, CLASS) print<CLASS>(OUT, #CLASS)
}
 
 
/**
 * \file
 *
 * Example program to test zero values (JMATH::zero).
 * \author mdejong
 */
int main(int argc, char**argv)
{
  using namespace std;
 
  int    debug;
 
  try {
 
    JParser<> zap("Example program to test zero values of non-primitive data types.");
 
    zap['d'] = make_field(debug)          = 3;
 
    zap(argc, argv);
  }
  catch(const exception &error) {
    FATAL(error.what() << endl);
  }
 
  using namespace JPP;
 
  PRINT(cout, size_t);
  PRINT(cout, int);
  PRINT(cout, float);
  PRINT(cout, double);
  PRINT(cout, long double);
  PRINT(cout, __A__);
 
  ASSERT(JLimits<size_t>::min() == numeric_limits<size_t>::min());
  ASSERT(JLimits<size_t>::max() == numeric_limits<size_t>::max());
  //ASSERT(JLimits<double>::min() == numeric_limits<double>::min());
  ASSERT(JLimits<double>::max() == numeric_limits<double>::max());
  ASSERT(JLimits<__A__> ::min() == A_MIN);
  ASSERT(JLimits<__A__> ::max() == A_MAX);
 
  return 0;
}