Add doc for _LIBCPP_ENABLE_CXX17_DISABLED_AUTO_PTR and make it work under _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@295407 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/UsingLibcxx.rst b/docs/UsingLibcxx.rst
index 9020a2c..fe32f5e 100644
--- a/docs/UsingLibcxx.rst
+++ b/docs/UsingLibcxx.rst
@@ -188,5 +188,7 @@
**_LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS**:
This macro is used to re-enable the `set_unexpected`, `get_unexpected`, and
- `unexpected` functions, which were removed in C++17. Unless this macro is
- define those names will not be available in C++17.
+ `unexpected` functions, which were removed in C++17.
+
+**_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR**:
+ This macro is used to re-enable `std::auto_ptr` in C++17.