Fix a typo in the synopsis comment. NFC. Thanks to K-ballo for the catch

llvm-svn: 324851

diff --git a/libcxx/include/utility b/libcxx/include/utility
index 535e3cb..f11d580 100644 (file)
--- a/libcxx/include/utility
+++ b/libcxx/include/utility
@@ -52,7 +52,7 @@ template <class T>
     >::type
     move_if_noexcept(T& x) noexcept; // constexpr in C++14
 
-template <class T> constexpr add_const<T>_t& as_const(T& t) noexcept;      // C++17
+template <class T> constexpr add_const_t<T>& as_const(T& t) noexcept;      // C++17
 template <class T>                      void as_const(const T&&) = delete; // C++17
 
 template <class T> typename add_rvalue_reference<T>::type declval() noexcept;