1 // PR c++/89767 2 // { dg-do compile { target c++14 } } 3 // { dg-options "-O2 -Wall" } 4 5 template <typename d> struct e { using g = d; }; 6 template <typename d, template <typename> class> using h = e<d>; 7 template <typename d, template <typename> class i> 8 using j = typename h<d, i>::g; 9 template <typename c> int k(c); 10 template <typename...> class au; 11 struct l { template <typename c> using m = typename c::f; }; 12 struct s : l { using af = j<au<int, int> *, m>; }; 13 template <unsigned long, typename> struct o; 14 template <long p, typename c> using q = typename o<p, c>::g; 15 template <typename> struct r; 16 template <typename c> struct r<c *> { typedef c aj; }; 17 template <typename ak, typename> struct al { typename r<ak>::aj operator*(); void operator++(); }; 18 template <typename am, typename an, typename ao> 19 bool operator!=(al<am, ao>, al<an, ao>); 20 template <unsigned long, typename...> struct ap; 21 template <unsigned long aq, typename ar, typename... as> 22 struct ap<aq, ar, as...> : ap<1, as...> {}; 23 template <unsigned long aq, typename ar> struct ap<aq, ar> {}; 24 template <typename... at> class au : public ap<0, at...> {}; 25 template <unsigned long p, typename ar, typename... as> 26 struct o<p, au<ar, as...>> : o<p - 1, au<as...>> {}; 27 template <typename ar, typename... as> struct o<0, au<ar, as...>> { typedef ar g; }; 28 template <long p, typename ar> constexpr ar av(ap<p, ar> __t) { return ar (); } 29 template <int p, typename... at> constexpr q<p, au<at...>> aw(au<at...> __t) { av<p>(__t); return q<p, au<at...>> (); } 30 struct bg { typedef s::af af; }; 31 struct F { typedef al<bg::af, int> bk; bk begin(); bk end(); }; 32 void bo() { int t = 0; F cv; for (auto bp : cv) [t, n = k(aw<1>(bp))] {}; } 33