[gcc.git] / gcc / testsuite / g++.dg / cpp0x / constexpr-array-ptr2.C

// { dg-do compile { target c++11 } }

template<class T>
struct IsNegative {
  int dummy; // Workaround for empty class problem
  constexpr IsNegative() : dummy(0) {}
  constexpr bool operator()(const T& x) {
    return x < T(0);
  }
};

template<class T, int N, class Pred>
constexpr bool has_neg(T (&x)[N], Pred p) {
  return p(x[0]) || p(x[1]);
}

constexpr int a[] = {1, -2};

constexpr auto answer = has_neg(a, IsNegative<int>{}); // #1

static_assert(answer, "Error");
Commit	Line	Data
4b2e63de	1	// { dg-do compile { target c++11 } }
fa2200cb JM	2
	3	template<class T>
	4	struct IsNegative {
	5	int dummy; // Workaround for empty class problem
	6	constexpr IsNegative() : dummy(0) {}
	7	constexpr bool operator()(const T& x) {
	8	return x < T(0);
	9	}
	10	};
	11
	12	template<class T, int N, class Pred>
	13	constexpr bool has_neg(T (&x)[N], Pred p) {
	14	return p(x[0]) \|\| p(x[1]);
	15	}
	16
	17	constexpr int a[] = {1, -2};
	18
	19	constexpr auto answer = has_neg(a, IsNegative<int>{}); // #1
	20
	21	static_assert(answer, "Error");