[all-commits] [llvm/llvm-project] f6fc5e: [libc++][test] Guard non-guaranteed implicit-lifet...

[A. Jiang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f6fc5e83d71e643518c63acb5e43847cd1813895
      https://github.com/llvm/llvm-project/commit/f6fc5e83d71e643518c63acb5e43847cd1813895
  Author: A. Jiang <de34 at live.cn>
  Date:   2025-09-26 (Fri, 26 Sep 2025)

  Changed paths:
    M libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_implicit_lifetime.pass.cpp

  Log Message:
  -----------
  [libc++][test] Guard non-guaranteed implicit-lifetime-ness cases with `_LIBCPP_VERSION` (#160627)

And add some guaranteed cases (namely, for `expected`, `optional`, and
`variant`) to `is_implicit_lifetime.pass.cpp`.

It's somehow unfortunate that `pair` and `tuple` are not guaranteed to
propagate triviality of copy/move constructors, and MSVC STL fails to do
so due to ABI compatibility. This affects the implicit-lifetime
property.



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