gcc/testsuite/g++.dg/concepts/auto3.C

   1 // { dg-options "-std=c++17 -fconcepts" }
   2
   3 template <class...> class tuple {};
   4
   5 tuple<int> t;
   6 tuple<auto> y = t;
   7
   8 tuple<int,double> t2;
   9 tuple<auto...> x = t2;
  10 tuple<auto...> x2 = t;
  11
  12 tuple<auto> y2 = t2;            // { dg-error "" }