[libcxx-commits] [clang] [libcxx] Elide suspension points via [[clang::coro_await_suspend_destroy]] (PR #152623)

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snarkmaster wrote:

Thanks! I'm happy to distill the conversation above into an RFC, but I first want to ask @ChuanqiXu9 if the `lookupReturnTypeIfAwaitSuspendDestroy()` implementation (and corresponding [discussion of overload resolution](https://github.com/llvm/llvm-project/pull/152623#discussion_r2288794474)) is satisfactory.

The rationale for settling this is that we might as well propose the most implementation-friendly attribute placement.

@ChuanqiXu9, let me know your reaction to the linked comment. If you need to see the full PR first, LMK, and I'll spend the hour or two to clean it up.

https://github.com/llvm/llvm-project/pull/152623