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

   1 // { dg-do compile { target c++17 } }
   2 // { dg-options "-fconcepts" }
   3
   4 template <class...> class tuple {};
   5
   6 tuple<int> t;
   7 tuple<auto> y = t;              // { dg-error "invalid|cannot convert" }
   8
   9 tuple<int,double> t2;
  10 tuple<auto...> x = t2;          // { dg-error "invalid|cannot convert" }
  11 tuple<auto...> x2 = t;          // { dg-error "invalid|cannot convert" }
  12
  13 tuple<auto> y2 = t2;            // { dg-error "invalid|cannot convert" }