1 // CWG issue 2310 2 // { dg-do compile { target c++11 } } 3 4 template<typename A, typename B> struct check_derived_from { 5 static A a; 6 static constexpr B *p = &a; // { dg-error "cannot convert" } 7 int ar[p-p+1]; // { dg-error "13:size of array is not an integral constant-expression" } 8 }; 9 struct W { int i; }; 10 struct Z : W 11 { 12 check_derived_from<Z, W> cdf; 13 }; 14