gcc/testsuite/g++.dg/cpp0x/constexpr-array-ptr4.C

   1 // { dg-do compile { target c++11 } }
   2
   3 constexpr const int do_last(const int* x, int n) {
   4  return x[n - 1];
   5 }
   6
   7 struct IsNegative {
   8   constexpr bool operator()(const int& x) {
   9     return x < 0;
  10   }
  11 };
  12
  13 template<int N, class Pred>
  14 constexpr bool has_neg(const int (&x)[N], Pred p) {
  15   return p(do_last(x, N)); // Line 13
  16 }
  17
  18 constexpr int a[] = {1, -2};
  19
  20 constexpr auto answer = has_neg(a, IsNegative{}); // Line 18
  21
  22 static_assert(answer, "Error");
  23