1 // PR c++/62255 2 3 // It's not clear whether this is well-formed; instantiating the 4 // initializer of 'value' causes the instantiation of Derived, which in 5 // turn requires the value of 'value', but the recursion ends there, so it 6 // seems reasonable to allow it. 7 8 template <typename T> struct Test { 9 template<typename X> static int check(typename X::Type*); 10 template<typename> static char check(...); 11 static const bool value = (sizeof(check<T>(0)) == sizeof(int)); 12 }; 13 template <int> struct Sink { }; 14 template <typename T> struct Derived : Sink<Test<Derived<T> >::value> { 15 typedef int Type; 16 }; 17 18 Sink<Test<Derived<int> >::value> s; 19