jyknight wrote:
The part I'm confused about is that this commit doesn't appear to simply be
adding "or `alignas`" to some code that said "if `_Alignas`". Yes, the newly
added `isAlignas()` checks do cover both attributes, but `_Alignas` was still
working even after b9cf7f1.
That is, in clang trunk, this test does still pass when parsed as -std=c23:
```
struct X {
_Alignas(8) char n;
};
static_assert(_Alignof(struct X) == 8, "");
```
So why does this PR need to add new code to move `alignas`, instead of having
`alignas` use whatever codepath was already handling `_Alignas`? Or,
alternatively remove whatever code was formerly handling `_Alignas`, in favor
of this new code?
Or, are `alignas` and `_Alignas` actually getting parsed differently, even
still, so only `alignas` needs to be moved?
https://github.com/llvm/llvm-project/pull/98642
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