Exception when C++ function call C function

[zhangpengstu]

My program is C++ code call C code,when exception(eg, null pointer ,array out of bandery) happened,what should I Do?
I try to used TRAPD(err, fun()); method ,But Not any exception
was catched . wether I used that not correct?
Does symbian has (ECH )"_try _execption" method to catch the exception that programer need not to throw execption at all?

I hope someone can help me!

[mikaellaine]

Symbian has its own exception handling system (the TRAP macro you mentioned). It also has its own exceptions, so you can't use C++ exceptions here. For example:

..
TRAPD(err, funL()); //Exception "catching"
if(err == KErrNone){..} //Exception handling
else{..}
..

void Something::funL() //the function that can "throw" an exception
{
..
if(somethingterrible)
{
User::Leave( reasoncode ); //SYMBIAN EXCEPTION ("throw")
}
..
}

If a function may leave (throw an exception), it has to have an 'L' at the end of its name.
I'm not sure if this answers your question... I hope it does.

[nigel.brown]

http://wiki.forum.nokia.com/index.ph..._in_Symbian_OS
http://wiki.forum.nokia.com/index.php/Panic
http://wiki.forum.nokia.com/index.ph...ulltext=Search

Understand the difference between a Panic and a Leave (sometimes, in some versions AKA Exception).

[zhangpengstu]

"_try _execption" not need programer trow execption

when the excepiton happend ,it can catch Mainly part of

execption . I need the method that programer not need

throw

[nigel.brown]

You could try User::SetExceptionHandler(), but you need to understand the difference between exceptions and panics as I said in the last post.