[Bug c++/88744] class non-type template parameters doesn't work with default template parameters

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88744

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2019-01-08
           Assignee|unassigned at gcc dot gnu.org      |mpolacek at gcc dot 
gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
But actually this works so I'm not sure if there's anything to be done except
adding the test.

#define SA(X) static_assert((X),#X)

struct S {
  int a;
  int b;
  constexpr S(int, int) : a(1), b(2) { }
};

template<S s = {1, 2}>
struct X {
  static constexpr int i = s.a;
  static constexpr int j = s.b;
};
X x; // ok, X<{1, 2}>

SA (x.i == 1);
SA (x.j == 2);