Re: [PATCH] Use NULL instead of integer 0 in security/selinux/

[Alexandre Oliva]

On Jul 11, 2004, Olaf Titz <olaf@xxxxxxxxxxxxxx> wrote:

> (Worse in C++ where usage of NULL is discouraged, I've always
> wondered about the reasons.)

FWIW, g++ defines NULL to the __null GCC-extension keyword, that
issues a warning if it's doesn't decay to a pointer type, but behaves
like the integral constant of value 0 otherwise, as required by the
C++ standard.

I suppose Linux might benefit from such an extension implemented in C
as well.  Well, looks like sparse already takes care of that, and GCC
has entered an new-extension-avoidance mode (or mood? :-) a few years
ago.

-- 
Alexandre Oliva             http://www.ic.unicamp.br/~oliva/
Red Hat Compiler Engineer   aoliva@{redhat.com, gcc.gnu.org}
Free Software Evangelist  oliva@{lsd.ic.unicamp.br, gnu.org}
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