[libcxx] Use custom allocator's `construct` in C++03 when available.

Makes libc++ behavior consistent between C++03 and C++11.

Can use `decltype` in C++03 because `include/__config` defines a macro when
`decltype` is not available.

Reviewers: mclow.lists, EricWF, erik.pilkington, ldionne

Reviewed By: ldionne

Subscribers: dexonsmith, cfe-commits, howard.hinnant, ldionne, christof, jkorous, Quuxplusone

Differential Revision: https://reviews.llvm.org/D48753

llvm-svn: 349676

1 files changed, 1 insertions, 1 deletions

diff --git a/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/destroy.pass.cpp b/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/destroy.pass.cpp
index 1a812876bf0..1060b73434d 100644
--- a/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/destroy.pass.cpp
+++ b/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.members/destroy.pass.cpp
@@ -73,7 +73,7 @@ int main()
       std::aligned_storage<sizeof(VT)>::type store;
       std::allocator_traits<Alloc>::destroy(a, (VT*)&store);
     }
-#if TEST_STD_VER >= 11
+#if defined(_LIBCPP_VERSION) || TEST_STD_VER >= 11
     {
         A0::count = 0;
         b_destroy = 0;