// Contributed by Dodji Seketeli <dodji@redhat.com>
// Origin PR c++/39754
// { dg-do compile }

template < typename > struct A ;
template < typename T , typename = A < T > > struct B { } ;
template < class W , class > struct D
{
  typedef W X ;
  A< X()> a ;
};

template < class Y > struct E
{
  B< Y()> b ;
};
E<int> e ;