[libcxx-commits] [libcxx] [libc++][ABI BREAK] Make std::pair trivially copyable if its members are (PR #89652)

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``````````bash
git-clang-format --diff c8e5ad4e123a5fb082355947a896980464689c31 90e202944d6032a3cccb6ffe777835f139374987 -- libcxx/test/libcxx/utilities/utility/pairs/pairs.pair/trivially_copyable.compile.pass.cpp libcxx/include/__utility/pair.h
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View the diff from clang-format here.
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``````````diff
diff --git a/libcxx/include/__utility/pair.h b/libcxx/include/__utility/pair.h
index 5a9f9f4a3a..5b3dec6e4d 100644
--- a/libcxx/include/__utility/pair.h
+++ b/libcxx/include/__utility/pair.h
@@ -144,7 +144,7 @@ struct _LIBCPP_TEMPLATE_VIS pair
   // Make pair trivially copyable if we have a way to do it
   static const bool __enable_defaulted_assignment_operators =
       !is_reference<first_type>::value && !is_reference<second_type>::value;
-#if _LIBCPP_STD_VER >= 20
+#  if _LIBCPP_STD_VER >= 20
   static const bool __has_defaulted_members = __enable_defaulted_assignment_operators;
 
   _LIBCPP_HIDE_FROM_ABI constexpr pair& operator=(const pair&)
@@ -162,7 +162,7 @@ struct _LIBCPP_TEMPLATE_VIS pair
 
   _LIBCPP_HIDE_FROM_ABI pair& operator=(pair&&)
       __attribute__((__enable_if__(__enable_defaulted_assignment_operators, ""))) = default;
-#else
+#  else
   static const bool __has_defaulted_members = false;
 #  endif                    // __has_attribute(__enable_if__)
 

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https://github.com/llvm/llvm-project/pull/89652