Re: Basic question on exception handling in C++

From:

=?iso-8859-1?q?Erik_Wikstr=F6m?= <eriwik@student.chalmers.se>

Newsgroups:

comp.lang.c++,comp.sources.d

Date:

Tue, 12 Jun 2007 07:19:58 -0700

Message-ID:

<1181657998.859432.213260@o11g2000prd.googlegroups.com>

On 12 Juni, 15:04, masood.iq...@lycos.com wrote:

In all the sample code snippets of try-catch code blocks that I have
seen, the catch block does one of the following three things:
1). exits the program (after spitting out a cerr message)
2). propagates the exception
3). throws yet another exception

I have a need to do something different. I want to merely spit out a
cerr message when I catch an exception, and then proceed with my
business logic. I am thinking of something like this:

////// Code snippet begin /////
bool noException = true;

try
{
  // some business logic operation}

catch(std::exception& xcptn)
{
  noException = false;
  cerr << "Exception: " << xcptn.what() << " at " << __FILE__ << ","
<< __LINE__ << endl;
  cerr << "Ignoring business logic operation\n";}

catch(...)
{
  noException = false;
  cerr << "Unrecognized exception at " << __FILE__ << "," << __LINE__
<< endl;
  cerr << "Ignoring business logic operation\n";

}

if(noException)
{
  // proceed with this business logic operation

}

////// Code snippet end /////

Am I doing it right, or is there a more professional way to do it?

Seems good to me. If you wish you can put the business logic operation
within the try-block, after the thing that might throw, since no more
statements will be executed in the try block if an exception is
thrown.

--
Erik Wikstr=F6m