This is xnu-11215.1.10. See this file in: 
//
// Tests for
//  explicit bounded_ptr();
//

#include <libkern/c++/bounded_ptr.h>
#include <darwintest.h>
#include <darwintest_utils.h>
#include "test_utils.h"

#define _assert(...) T_ASSERT_TRUE((__VA_ARGS__), # __VA_ARGS__)

struct T { };

template <typename T>
static void
tests()
{
	{
		test_bounded_ptr<T> p;
		_assert(p == nullptr);
	}
	{
		test_bounded_ptr<T> p{};
		_assert(p == nullptr);
	}
}

T_DECL(ctor_default, "bounded_ptr.ctor.default", T_META_TAG_VM_PREFERRED) {
	tests<T>();
	tests<T const>();
	tests<T volatile>();
	tests<T const volatile>();
}