C++ question - Further Info in a Catch(...)?

ozmo

Hi,
CPP question (ms compiler)
is there any information that can be gained in the catch(...) block.
like the line number or nestled function - other than the fact that it
just failed somewhere between in the try block.

try
{
.... lots of lines
int x = 1/0; //math errors
char p = *(0); // null pointer exception, mfc api network errors etc
.... lots of lines
}
catch(...)
{
//Line number = ??
}

thanks,
ozmo.

ressem

Not unless you program it to.

e.g

catch(runtime_error &e)
{
cout << e.what();
}

could be "domain_error", "logic_error" etc

there's a few standard exceptions, beyond that you tell your classes what message to relay. eg a db class might have a db_exception which you'd use in the catch.

catch(...) is a catch everything and keep quiet option.

ozmo

ressem wrote:

Not unless you program it to.

e.g

catch(runtime_error &e)
{
cout << e.what();
}

could be "domain_error", "logic_error" etc

there's a few standard exceptions, beyond that you tell your classes what message to relay. eg a db class might have a db_exception which you'd use in the catch.

catch(...) is a catch everything and keep quiet option.

ehhh - way I've been doin it - just hoped there might have been some equivalent like
catch(exception& ex)
which might give some info without having to litter a particular troublesome bit of code with try blocks.
ta.

ressem

You've to create your own version of exception
is this
http://www.codeproject.com/cpp/exception.asp
more like it?

ozmo

ressem wrote:

You've to create your own version of exception
is this
http://www.codeproject.com/cpp/exception.asp
more like it?

Ah very good. I knew it must be possible somehow as visual c environment
is able to to do it.
Full stack trace and error trapping for general errors like memory access errors