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// { dg-do run { target c++2a } }
#include <compare>
#define assert(X) do { if (!(X)) __builtin_abort(); } while(0)
void f(){}
void g(){}
template <class T, class U, class R>
constexpr bool check(T a, U b, R expected)
{
auto r = a <=> b;
static_assert (__is_same_as (decltype (r), R));
return r == expected;
}
int main()
{
static_assert (check (1, 2, std::strong_ordering::less));
enum E1 { a = 0 };
static_assert (check (a, 1, std::strong_ordering::less));
enum class E2 { a, b };
static_assert (check (E2::a, E2::b, std::strong_ordering::less));
int ar[2];
static_assert (check (&ar[1], &ar[0], std::strong_ordering::greater));
static_assert (check (3.14, 3.14, std::partial_ordering::equivalent));
// GCC doesn't consider &f == &g to be a constant expression (PR 69681)
assert (check (&f, &g, std::strong_equality::nonequal));
struct A { int i; int j; };
static_assert (check (&A::i, &A::j, std::strong_equality::nonequal));
struct A2 { void f(); };
static_assert (check (&A2::f, &A2::f, std::strong_equality::equal));
}
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