Am Dienstag, den 17.11.2020, 11:31 -0800 schrieb Linus Torvalds: > On Tue, Nov 17, 2020 at 11:25 AM Jakub Jelinek <ja...@redhat.com> wrote: > > > > It would need to be typeof( (typeof(type)) (type) ) to not be that > > constrained on what kind of expressions it accepts as arguments. > > Yup. > > > Anyway, it won't work with array types at least, > > int a[10]; > > typeof ((typeof (a)) (a)) b; > > is an error (in both gcc and clang), while typeof (a) b; will work > > (but not drop the qualifiers). Don't know if the kernel cares or not. > > Well, the kernel already doesn't allow that, because our existing > horror only handles simple integer scalar types. > > So that macro is a clear improvement - if it actually works (local > testing says it does, but who knows about random compiler versions > etc)
Well, the version that also works for other types (except multi-dim arrays) is slightly more complicated ;-) https://godbolt.org/z/KTKqon Best, Martin
