[Bug c++/92171] accept incorrect access of static constexpr member when read from a reference

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92171

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mpolacek at gcc dot gnu.org

--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I think this is another example:

template<int N> struct A {
  static constexpr int size() { return N; }
};

template<typename T> void f1(T t) {
  constexpr int k = t.size();
}

template<typename T> void f2(const T &t) {
  constexpr int k = t.size(); // error
}

template<typename T> void f3(const T &t) {
  constexpr int k = T::size();
}

void g(A<3> a)
{
  f1(a);
  f2(a);
  f3(a);
}