Using HIDE_SCOPE_NAMES will not only hide the scope in a detail description of a member function but also the template parameters itself.

e.g.

/// A foo class.
class foo {
  /// A foo template member function.
  template<typename InputIterator>
  void fun(InputIterator begin, InputIterator end);
};

The detail description of fun with HIDE_SCOPE_NAMES = yes will be

void fun(InputIterator begin, InputIterator end);

without

template<typename InputIterator>
foo::fun(InputIterator begin, InputIterator end)

The second case gets rather ugly for template members of class templates.
It would be better if the template<...> weren't omitted in if
HIDE_SCOPE_NAMES = yes is set and maybe another option to hide those were provided.