Am Mittwoch, den 02.02.2022, 08:49 +0000 schrieb David Laight: > From: Rasmus Villemoes > > Sent: 01 February 2022 13:06 > ... > > > + * - The C standard defines an "integer constant expression" as different > > > + * from a "null pointer constant" (an integer constant 0 pointer). > > > > I don't see the point of this bullet. Yes, an ICE is a distinct concept > > from a null pointer constant, obviously. One is defined in terms of the > > other - and your parenthesis is not an accurate paraphrase of the > > definition of a null pointer constant. > > From what I remember a "null pointer constant" is in "integer constant > expression with value 0 cast to a pointer type". > So (void *)(1-1) is just as valid as (void *)0. > > Not sure any of it is relevant here. The C standard (at least public drafts essentially identical to the actual standards) can be found here: http://www.open-std.org/jtc1/sc22/wg14/www/projects#9899 "An integer constant expression with the value 0, or such an expression cast to type void *, is called a null pointer constant." BTW: I think it would be very valuable if WG14 would get proposals and/or comments from the kernel community. Martin > David > > - > Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK > Registration No: 1397386 (Wales) >
