Joseph, do you have any more comments on the rest of the most recent
revision of the patch?
https://gcc.gnu.org/pipermail/gcc-patches/2020-August/552266.html
Martin
On 8/19/20 6:09 PM, Joseph Myers wrote:
On Wed, 19 Aug 2020, Martin Sebor via Gcc-patches wrote:
I think you need a while loop there, not just an if, to account for the
case of multiple consecutive cdk_attrs. At least the GNU attribute syntax
direct-declarator:
[...]
( gnu-attributes[opt] declarator )
should produce multiple consecutive cdk_attrs for each level of
parentheses with attributes inside.
I had considered a loop but couldn't find a way to trigger what you
describe (or a test in the testsuite that would do it) so I didn't
use one. I saw loops like that in other places but I couldn't get
even those to uncover such a test case. Here's what I tried:
#define A(N) __attribute__ ((aligned (N), may_alias))
int n;
void f (int (* A (2) A (4) (* A (2) A (4) (* A (2) A (4) [n])[n])));
Sequences of consecutive attributes are all chained together.
I've added the loop here but I have no test for it. It would be
good to add one if it really is needed.
The sort of thing I'm thinking of would be, where A is some attribute:
void f (int (A (A (A arg))));
(that example doesn't involve an array, but it illustrates the syntax I'd
expect to produce multiple consecutive cdk_attrs).
