On Tue, Mar 24, 2009 at 10:12 PM, Martijn van Oosterhout
<kleptog@svana.org> wrote:
> Not really a GCC extension, but you could have the macro check that it
> can take the address of the arguments, which amounts to almost the same
> thing. It only doesn't work on constants.
No, there are all kinds of complex expressions which are lvalues --
anything ending in a pointer dereference for example, which is
precisely the most likely kind of expression to introduce seg fault if
something is unexpectedly null
.
--
greg
