1 // PR c++/79457 2 // { dg-do compile { target c++11 } } 3 4 template <typename T> 5 class Foo 6 { 7 private: 8 T& goo; 9 template <typename R> 10 using S = decltype (goo[R ()]); 11 12 public: Foo(T & goo)13 Foo (T& goo) : goo {goo} {} 14 15 template <typename R> boo()16 S<R> boo () {} 17 }; 18 19 int main()20main () 21 { 22 int bar[] = {1, 2, 3}; 23 Foo<decltype (bar)> foo {bar}; 24 } 25