Hmm, that's a bit disappointing…might I suggest trying out a LibClang-based IDE, if CLion isn't using it already? It can do wonders even to "stupid" applications. For example, my Sublime Text (by itself, with only basic knowledge of C++ keywords and such) with clangd tells me that std::make_shared comes from this code in <memory>:

  template<class _Tp, class ..._Args>
  inline _LIBCPP_INLINE_VISIBILITY
  typename enable_if
  <
      !is_array<_Tp>::value,
      shared_ptr<_Tp>
  >::type
  make_shared(_Args&& ...__args)
  {
      return shared_ptr<_Tp>::make_shared(_VSTD::forward<_Args>(__args)...);
  }