Add trailing return types (and noexcept specifications) to the 'diamond operators'. Fixes PR#22600. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@230484 91177308-0d34-0410-b5e6-96231b3b80d8 
diff --git a/include/__functional_base b/include/__functional_base index e174e0c..09424bc 100644 --- a/include/__functional_base +++ b/include/__functional_base 
@@ -70,7 +70,9 @@  template <class _T1, class _T2>   _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY  auto operator()(_T1&& __t, _T2&& __u) const - { return _VSTD::forward<_T1>(__t) < _VSTD::forward<_T2>(__u); } + _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) < _VSTD::forward<_T2>(__u))) + -> decltype (_VSTD::forward<_T1>(__t) < _VSTD::forward<_T2>(__u)) + { return _VSTD::forward<_T1>(__t) < _VSTD::forward<_T2>(__u); }  typedef void is_transparent;  };  #endif