[libcxx-commits] [libcxx] [libc++] Add ABI tests for introducing _LIBCPP_COMPRESSED_ELEMENT (PR #156416)

[Nikolas Klauser via libcxx-commits]

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+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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philnik777 wrote:

It turns out emptyness checks are way less interesting than I thought at first. A tuple with more than zero elements is never empty, because `__tuple_impl` is always a non-zero-size member of `tuple`.

https://github.com/llvm/llvm-project/pull/156416