gcc/testsuite/g++.dg/template/ptrmem6.C

// { dg-do compile }
// Origin: <togawa at acm dot arg>
// c++/2094: unsupported 'ptrmem_cst' in type unification

struct R
{
   int i;
};

struct S
{
   int i;
   int j;
};

struct S2 : S
{};

template<int S::*p, typename>
struct X
{
    X ();
    template<typename U> X(const X<p,U> &);
};

X<&S::i,S> x  = X<&S::i,S>();
X<&S::i,S> x2 = X<&S2::i,S>();
X<&S::i,S> y  = X<&S::j,S>();  // { dg-error "" }
X<&S::i,S> z  = X<&R::i,S>();  // { dg-error "" }

template <class T>
struct Foo
{
  void foo(void)
  {
     X<&T::i,T> x  = X<&T::i,T>();
     X<&S::i,S> x2 = X<&S2::i,S>();
     X<&S::i,S> y  = X<&S::j,S>(); // { dg-error "" }
     X<&S::i,S> z  = X<&R::i,S>(); // { dg-error "" }
  }
};

template struct Foo<S>;  // { dg-error "instantiated from" }