Re: ExceptionHandler class & list of error messages ?

From:
"mast2as@yahoo.com" <mast2as@yahoo.com>
Newsgroups:
comp.lang.c++
Date:
16 Jul 2006 22:17:05 -0700
Message-ID:
<1153113425.821334.275520@s13g2000cwa.googlegroups.com>

First, please put your responses below or inline the message you are
responding to. That's the custom here.


Here is a version of the code that works. Because i found it really
interesting (I quite a few new tricks) I thought I would post a
complete version that compiles and runs. Hopefully doing all the
changes you mentionned. I just removed const. Not sure it was really
necessary but this way i could make your first version of the code
work.

Thank you again your help -

#include <iostream>
#include <deque>
#include <map>
#include <exception>

class TException : public std::exception
{
public:

  enum errorCode
  {
    kTest1 = 1,
    kTest2 = 10,
    kTest3 = 12,
    kTest4 = 20
  };

  // error severity levels
  //
  // #define RIE_INFO 0
  // #define RIE_WARNING 1
  // #define RIE_ERROR 2
  // #define RIE_SEVERE 3

  enum severityLevel
  {
    kInfo = 0, // Rendering stats and other info
    kWarning, // Something seems wrong, maybe okay
    kError, // Problem. Results may be wrong
    kSevere // So bad you should probably abort
  };

  // error handlers codes
  //
  // #define RIE_ERRORIGNORE 0
  // #define RIE_ERRORPRINT 1
  // #define RIE_ERRORABORT 2

  enum handlerCode
  {
    kErrorIgnore = 0,
    kErrorPrint,
    kErrorAbort,
  };

  typedef std::map<TException::errorCode, const char*> MsgMap;

public:
  TException( TException::errorCode code, TException::handlerCode
handler =
    kErrorIgnore, TException::severityLevel severity = kInfo ) :
    m_error( code ),
    m_severity( severity ),
    m_handler( handler )
  {}

  ~TException() throw() {}

  const char* what() const throw()
  {
    return myMsgMap[ m_error ];
  }

private:
  TException::errorCode m_error;
  TException::handlerCode m_handler;
  TException::severityLevel m_severity;

  static MsgMap myMsgMap;
};

class MsgMapInitializer
{
  TException::MsgMap m_;
public:
  operator TException::MsgMap() const { return m_; }
  MsgMapInitializer& Add( TException::errorCode error, const char * msg
)
  {
    m_[ error ] = msg;
    return *this;
  }
};

TException::MsgMap TException::myMsgMap = MsgMapInitializer()
  .Add( TException::kTest1, "test1" )
  .Add( TException::kTest2, "test2" )
  .Add( TException::kTest3, "test3" );

int main()
{
  try {
    // throw something
    throw( TException( TException::kTest1, TException::kErrorPrint,
      TException::kWarning ) );
  } catch( TException &e ) {
    std::cout << e.what() << std::endl;
  };
  return 0;
}

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