JThrow.hh

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#ifndef __JLANG__JTHROW__
#define __JLANG__JTHROW__
 
#include <iostream>
 
#include "JLang/JException.hh"
 
 
/**
 * \file
 *
 * Exception handling.
 * \author mdejong
 */
namespace JLANG {}
namespace JPP { using namespace JLANG; }
 
namespace JLANG {
 
  /**
   * Auxiliary base class for controling the throwing of exceptions.
   * The template class refers to the throwing object.
   */
  template<class T>
  class JThrow {
  protected:
 
    static bool do_throw;     //!< throw option
 
 
  public:
    /**
     * Enable/disable throw option.
     *
     * \param  option         true enable; false disable
     */
    static void Throw(const bool option)
    {
      do_throw = option;
    }
 
 
    /**
     * Throw exception or return error.
     *
     * \param  error          exception
     * \param  value          return code
     * \return                return code
     */
    template<class JException_t>
    static int Throw(const JException_t& error, const int value = -1)
    {
      using namespace std;
      
      if (do_throw) {
        throw error;
      }
 
      cerr << error.what() << endl;
      
      return value;
    }
  };
 
 
  /**
   * Set default throw option to <tt>true</tt>.
   */
  template<class T>
  bool JThrow<T>::do_throw = true; 
}
 
#endif