119         struct impl2  struct
122             typedef typename BOOST_PROTO_RESULT_OF<Fun()>::type result_type;
125             result_type operator()(  in operator ()()
137         struct impl2<Expr, State, Data, true>  struct
168         struct impl2  struct
171             typedef typename when<_, A0>::template impl<Expr, State, Data>::result_type a0;
172             typedef typename detail::poly_function_traits<Fun, Fun(a0)>::result_type result_type;
175             result_type operator ()(  in operator ()()
188         struct impl2<Expr, State, Data, true>  struct
191             typedef typename when<_, A0>::template impl<Expr, State, Data>::result_type a0;
192             typedef typename Fun::template impl<a0, State, Data>::result_type result_type;
195             result_type operator ()(  in operator ()()
241         struct impl2  struct
244             typedef typename when<_, A0>::template impl<Expr, State, Data>::result_type a0;
245             typedef typename when<_, A1>::template impl<Expr, State, Data>::result_type a1;
246 …          typedef typename detail::poly_function_traits<Fun, Fun(a0, a1)>::result_type result_type;
249             result_type operator ()(  in operator ()()
263         struct impl2<Expr, State, Data, true>  struct
266             typedef typename when<_, A0>::template impl<Expr, State, Data>::result_type a0;
267             typedef typename when<_, A1>::template impl<Expr, State, Data>::result_type a1;
268             typedef typename Fun::template impl<a0, a1, Data>::result_type result_type;
271             result_type operator ()(  in operator ()()
324         struct impl2  struct
327             typedef typename when<_, A0>::template impl<Expr, State, Data>::result_type a0;
328             typedef typename when<_, A1>::template impl<Expr, State, Data>::result_type a1;
329             typedef typename when<_, A2>::template impl<Expr, State, Data>::result_type a2;
330 …      typedef typename detail::poly_function_traits<Fun, Fun(a0, a1, a2)>::result_type result_type;
333             result_type operator ()(  in operator ()()
348         struct impl2<Expr, State, Data, true>  struct
351             typedef typename when<_, A0>::template impl<Expr, State, Data>::result_type a0;
352             typedef typename when<_, A1>::template impl<Expr, State, Data>::result_type a1;
353             typedef typename when<_, A2>::template impl<Expr, State, Data>::result_type a2;
354             typedef typename Fun::template impl<a0, a1, a2>::result_type result_type;
357             result_type operator ()(  in operator ()()