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Re: [PATCH] Accept -> in offsetof member-designator (the same as `[0].', PR c/32084)
- From: "Andrew Pinski" <pinskia at gmail dot com>
- To: "Jakub Jelinek" <jakub at redhat dot com>
- Cc: "Joseph S. Myers" <joseph at codesourcery dot com>, "Jason Merrill" <jason at redhat dot com>, "Mark Mitchell" <mark at codesourcery dot com>, gcc-patches at gcc dot gnu dot org
- Date: Fri, 9 Jan 2009 12:29:04 -0800
- Subject: Re: [PATCH] Accept -> in offsetof member-designator (the same as `[0].', PR c/32084)
- References: <20090107213401.GI25055@tyan-ft48-01.lab.bos.redhat.com>
On Wed, Jan 7, 2009 at 1:34 PM, Jakub Jelinek <jakub@redhat.com> wrote:
> Hi!
>
> For struct S { struct T { int i; } t[2]; } is
> offsetof (struct S, t->i) valid, as with static struct S s;
> &s.t->i is a valid address constant. The following patch parses
> it in both C and C++ FEs as [0]. Bootstrapped/regtested on x86_64-linux,
> ok for trunk?
I think this will also accept:
struct S { struct T { int i; } *t; }
int a = offsetof (struct S, t->i);
Which is invalid code and why -> was being prevented from being parsed.
Thanks,
Andrew Pinski