[PATCH] D99834: Don't check that std::pair is trivially copyable on FreeBSD

[Dimitry Andric via Phabricator via llvm-commits]

dim added inline comments.


================
Comment at: llvm/unittests/Support/TypeTraitsTest.cpp:113
   TrivialityTester<std::function<int()>, false, false>();
+#if !defined(_LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR)
   TrivialityTester<std::pair<int, bool>, true, true>();
----------------
ldionne wrote:
> I'm really not fond of using a libc++ internal macro here. I think we should instead detect that we're on FreeBSD.
At the moment in `__config` the part where this macro gets defined is indeed only when `__FreeBSD__` is defined:

```
// Feature macros for disabling pre ABI v1 features. All of these options
// are deprecated.
#  if defined(__FreeBSD__)
#    define _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR
#  endif
#endif
```

So this could as well be `#if !defined(__FreeBSD__)`, yes. At some point though we'll have to migrate to libc++ ABI v2 (whenever that comes), so then this check would have to be adjusted too...



Repository:
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  https://reviews.llvm.org/D99834/new/

https://reviews.llvm.org/D99834