Messages in this thread | | | Subject | Re: [PATCH 2/2] system_data_types.7: void *: Add info about pointer artihmetic | From | Alejandro Colomar <> | Date | Fri, 2 Oct 2020 11:46:28 +0200 |
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Hi Michael,
The 2/2 is a typo. This is a standalone patch.
Cheers,
Alex
On 2020-10-02 11:44, Alejandro Colomar wrote: > Reported-by: Paul Eggert <eggert@cs.ucla.edu> > Reported-by: David Laight <David.Laight@ACULAB.COM> > Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com> > --- > > Paul and David, > Thanks for your input! > > Alex > > > man7/system_data_types.7 | 11 +++++++++++ > 1 file changed, 11 insertions(+) > > diff --git a/man7/system_data_types.7 b/man7/system_data_types.7 > index 6451782db..bc7d5a8a0 100644 > --- a/man7/system_data_types.7 > +++ b/man7/system_data_types.7 > @@ -1918,6 +1918,17 @@ A value of this type can't be dereferenced, > as it would give a value of type > .I void > which is not possible. > +Likewise, pointer arithmetic is not possible with this type. > +However, in GNU C, poitner arithmetic is allowed > +as an extension to the standard; > +this is done by treating the size of a > +.I void > +or of a function as 1. > +A consequence of this is that > +.I sizeof > +is also allowed on > +.I void > +and on function types, and returns 1. > .PP > The conversion specifier for > .I void * >
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