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// { dg-options -std=c++0x }

typedef decltype(sizeof(char)) size_type;

template

constexpr size_type do_find_if_or_stop(T (&x)[N], size_type i, Pred p);

template

constexpr size_type do_find_if(T (&x)[N], size_type i, Pred p) {

  return p(x[i]) ? i : do_find_if_or_stop(x, i + 1, p);  // line 8

}

template

constexpr size_type do_find_if_or_stop(T (&x)[N], size_type i, Pred p) {

  return i == N ? N : do_find_if(x, i, p);

} // Line 14

template

constexpr size_type find_if(T (&x)[N], Pred p) {

        return do_find_if(x, 0, p); // Line 18

}

constexpr long items_long[] = {1, 2, 3, 4, -5, 6, -7, 8};

template

struct IsNegative {

        constexpr bool operator()(const T& x) {

                return x < T(0);

        }

};

constexpr auto pos1 = find_if(items_long, IsNegative{}); // Line 30

static_assert(pos1 == 4, "find_if failure");