[llvm] [clang] [Coroutines] Introduce [[clang::coro_only_destroy_when_complete]] (PR #71014)

[via cfe-commits]

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@@ -718,6 +718,7 @@ enum AttributeKindCodes {
   ATTR_KIND_NOFPCLASS = 87,
   ATTR_KIND_OPTIMIZE_FOR_DEBUGGING = 88,
   ATTR_KIND_WRITABLE = 89,
+  ATTR_KIND_CORO_ONLY_DESTROY_WHEN_DONE = 90,
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h-vetinari wrote:

still `_DONE` not `_COMPLETE` (plus all later usages of it).

https://github.com/llvm/llvm-project/pull/71014