// { dg-do compile }// Make sure we emit a decent error message when trying to mangle an//  expression not supported by the C++ ABI due to a defect.template <int N>struct A {};struct B{  static int foo(void);};template <class T>A<sizeof(T::foo())> func(void);int main(){  func<B>();  // { dg-error "sorry, unimplemented" }}