[libcxx-commits] [libcxx] [libc++] Work around new GCC 15 type_traits builtins that can't be used as Clang's can (PR #137871)

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``````````bash
git-clang-format --diff HEAD~1 HEAD --extensions h -- libcxx/include/__type_traits/add_lvalue_reference.h libcxx/include/__type_traits/add_pointer.h libcxx/include/__type_traits/add_rvalue_reference.h libcxx/include/__type_traits/decay.h libcxx/include/__type_traits/remove_all_extents.h libcxx/include/__type_traits/remove_extent.h
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View the diff from clang-format here.
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``````````diff
diff --git a/libcxx/include/__type_traits/add_pointer.h b/libcxx/include/__type_traits/add_pointer.h
index f37f9cf5a..289d51adc 100644
--- a/libcxx/include/__type_traits/add_pointer.h
+++ b/libcxx/include/__type_traits/add_pointer.h
@@ -20,7 +20,8 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if !defined(_LIBCPP_WORKAROUND_OBJCXX_COMPILER_INTRINSICS) && __has_builtin(__add_pointer) && !defined(_LIBCPP_COMPILER_GCC)
+#if !defined(_LIBCPP_WORKAROUND_OBJCXX_COMPILER_INTRINSICS) && __has_builtin(__add_pointer) &&                         \
+    !defined(_LIBCPP_COMPILER_GCC)
 
 template <class _Tp>
 using __add_pointer_t _LIBCPP_NODEBUG = __add_pointer(_Tp);

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https://github.com/llvm/llvm-project/pull/137871