🔒 Locked

null class pointer exception

Started by psykr Oct 19, 2003 at 5:42 PM 2 replies 350+ views

Original Post

Oct 19, 2003 at 5:42 PM

What''s the exception that gets thrown when I do something like:

CFoo* pFoo = 0;
pFoo->Member();

I''m trying to figure out what exception to catch.

Matsen

Oct 19, 2003 at 6:06 PM

EXCEPTION_ACCESS_VIOLATION (SEH) on Windows, if Member() is virtual or tries to operate on the this pointer.

Sneftel

Oct 19, 2003 at 6:07 PM

No exception is usually thrown by the call itself, as long as it''s not a virtual function. If it is a virtual function, there''s a segfault from trying to read a memory location very close to 0. If it isn''t, there will be the same sort of segfault if and only if the function accesses nonstatic member variables.

How appropriate. You fight like a cow.

Shannon Barber

Oct 19, 2003 at 7:40 PM

I think you have to use platform specific code; I''ve been meaning to look into this for a couple of years now...

You can use catch(...) after catch(std::exception&) to catch non-C++ exceptions.

Topic Locked

This topic has been locked by a moderator. New replies are not allowed.