On Wed, Jan 09, 2019 at 03:14:10PM -0800, Linus Torvalds wrote: > On Wed, Jan 9, 2019 at 1:02 PM Luc Van Oostenryck > <luc.vanoostenryck@xxxxxxxxx> wrote: > > > > But this make me wonder ... > > I'm all for strict typing, it's in general a precious help, but > > for this "Using plain integer as NULL pointer" warning: > > 1) the problem of using 0 (an int) in a variadic function call > > expecting a pointer (possibly larger than an int) is well known > > but is there any other problem of using 0 instead of NULL? > > 2) when the warning is issued it is known that a pointer is expected > > so a size problem like in 1) is not possible. > > > > So isn't this a case of a 'bad warning'? > > No. ... > Any language which allows you to write > > strnlen(0, NULL); > > without screaming about getting the types entirely wrong for both > arguments is simply not worth using. Yes, of course. I overlooked the obvious case. -- Luc
