[PATCH] D32671: [libcxx] [test] variant: test coverage for P0602 extension

[Casey Carter via Phabricator via cfe-commits]

CaseyCarter created this revision.

NOTE: Unlike my typical `variant` test PRs, this one is actually safe to merge - crazy, I know - since it only adds coverage while testing the VC++ STL.



- Define a new macro `_MSVC_STL_VER` to distinguish testing the VC++ standard library implementation in the style of `_LIBCPP_VER`.

- Enable the "constexpr extension" tests for variant's copy/move constructors on VC++

- Add some new "triviality extension" tests for variant's conformance to P0602, currently only enabled on VC++

- Workaround C1XX's buggy `__is_trivially_copyable` in the variant tests.


https://reviews.llvm.org/D32671

Files:
  test/std/utilities/variant/variant.variant/variant.assign/copy.pass.cpp
  test/std/utilities/variant/variant.variant/variant.assign/move.pass.cpp
  test/std/utilities/variant/variant.variant/variant.ctor/copy.pass.cpp
  test/std/utilities/variant/variant.variant/variant.ctor/move.pass.cpp
  test/support/msvc_stdlib_force_include.hpp
  test/support/test.workarounds/c1xx_broken_is_trivially_copyable.pass.cpp
  test/support/test_workarounds.h

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