[apple/xnu.git] / tests / intrusive_shared_ptr_src / assign.move.cpp

//
// Tests for
//  template <typename U>
//  intrusive_shared_ptr& operator=(intrusive_shared_ptr<U, RefcountPolicy>&& other);
//
//  intrusive_shared_ptr& operator=(intrusive_shared_ptr&& other);
//

#include <libkern/c++/intrusive_shared_ptr.h>
#include <darwintest.h>
#include <type_traits>
#include <utility>
#include "test_policy.h"

struct Base { int i; };
struct Derived : Base { };

struct Base1 { int i; };
struct Base2 { long l; };
struct DerivedMultiple : Base1, Base2 {
	DerivedMultiple(int i) : Base1{i}, Base2{i + 10}
	{
	}
};

struct Unrelated { };

template <typename Stored, typename From, typename To>
static void
tests()
{
	Stored obj1{1};
	Stored obj2{2};

	// Move-assign non-null to non-null
	{
		tracked_shared_ptr<From> from(&obj1, libkern::retain);
		tracked_shared_ptr<To> to(&obj2, libkern::retain);
		tracking_policy::reset();
		tracked_shared_ptr<To>& ref = (to = std::move(from));
		CHECK(tracking_policy::releases == 1);
		CHECK(tracking_policy::retains == 0);
		CHECK(&ref == &to);
		CHECK(from.get() == nullptr);
		CHECK(to.get() == &obj1);
	}

	// Move-assign non-null to null
	{
		tracked_shared_ptr<From> from(&obj1, libkern::retain);
		tracked_shared_ptr<To> to = nullptr;
		tracking_policy::reset();
		tracked_shared_ptr<To>& ref = (to = std::move(from));
		CHECK(tracking_policy::releases == 0);
		CHECK(tracking_policy::retains == 0);
		CHECK(&ref == &to);
		CHECK(from.get() == nullptr);
		CHECK(to.get() == &obj1);
	}

	// Move-assign null to non-null
	{
		tracked_shared_ptr<From> from = nullptr;
		tracked_shared_ptr<To> to(&obj2, libkern::retain);
		tracking_policy::reset();
		tracked_shared_ptr<To>& ref = (to = std::move(from));
		CHECK(tracking_policy::releases == 1);
		CHECK(tracking_policy::retains == 0);
		CHECK(&ref == &to);
		CHECK(from.get() == nullptr);
		CHECK(to.get() == nullptr);
	}

	// Move-assign null to null
	{
		tracked_shared_ptr<From> from = nullptr;
		tracked_shared_ptr<To> to = nullptr;
		tracking_policy::reset();
		tracked_shared_ptr<To>& ref = (to = std::move(from));
		CHECK(tracking_policy::releases == 0);
		CHECK(tracking_policy::retains == 0);
		CHECK(&ref == &to);
		CHECK(from.get() == nullptr);
		CHECK(to.get() == nullptr);
	}
}

T_DECL(assign_move, "intrusive_shared_ptr.assign.move") {
	tests</*stored*/ Derived, /*from*/ Derived, /*to*/ Derived>();
	tests</*stored*/ Derived, /*from*/ Derived, /*to*/ Derived const>();
	tests</*stored*/ Derived, /*from*/ Derived const, /*to*/ Derived const>();

	tests</*stored*/ Derived, /*from*/ Derived, /*to*/ Base>();
	tests</*stored*/ Derived, /*from*/ Derived, /*to*/ Base const>();
	tests</*stored*/ Derived, /*from*/ Derived const, /*to*/ Base const>();

	tests</*stored*/ DerivedMultiple, /*from*/ DerivedMultiple, /*to*/ Base1>();
	tests</*stored*/ DerivedMultiple, /*from*/ DerivedMultiple const, /*to*/ Base1 const>();

	tests</*stored*/ DerivedMultiple, /*from*/ DerivedMultiple, /*to*/ Base2>();
	tests</*stored*/ DerivedMultiple, /*from*/ DerivedMultiple const, /*to*/ Base2 const>();

	// Make sure basic trait querying works
	static_assert(std::is_move_assignable_v<test_shared_ptr<Derived> >);

	// Make sure downcasts are disabled
	static_assert(!std::is_assignable_v</*to*/ test_shared_ptr<Derived>, /*from*/ test_shared_ptr<Base>&&>);
	static_assert(!std::is_assignable_v</*to*/ test_shared_ptr<DerivedMultiple>, /*from*/ test_shared_ptr<Base1>&&>);
	static_assert(!std::is_assignable_v</*to*/ test_shared_ptr<DerivedMultiple>, /*from*/ test_shared_ptr<Base2>&&>);
	static_assert(!std::is_assignable_v</*to*/ test_shared_ptr<Base2>, /*from*/ test_shared_ptr<Base1>&&>);

	// Make sure const-casting away doesn't work
	static_assert(!std::is_assignable_v</*to*/ test_shared_ptr<Derived>, /*from*/ test_shared_ptr<Derived const>&&>);

	// Make sure casting to unrelated types doesn't work
	static_assert(!std::is_assignable_v</*to*/ test_shared_ptr<char>, /*from*/ test_shared_ptr<Derived>&&>);
	static_assert(!std::is_assignable_v</*to*/ test_shared_ptr<Unrelated>, /*from*/ test_shared_ptr<Derived>&&>);
	static_assert(!std::is_assignable_v</*to*/ test_shared_ptr<Base2>, /*from*/ test_shared_ptr<Base1>&&>);

	// Make sure constructing with different policies doesn't work
	static_assert(!std::is_assignable_v</*to*/ libkern::intrusive_shared_ptr<Derived, dummy_policy<2> >, /*from*/ libkern::intrusive_shared_ptr<Derived, dummy_policy<1> >&&>);
}
Commit	Line	Data
f427ee49 A	1	//
	2	// Tests for
	3	// template <typename U>
	4	// intrusive_shared_ptr& operator=(intrusive_shared_ptr<U, RefcountPolicy>&& other);
	5	//
	6	// intrusive_shared_ptr& operator=(intrusive_shared_ptr&& other);
	7	//
	8
	9	#include <libkern/c++/intrusive_shared_ptr.h>
	10	#include <darwintest.h>
	11	#include <type_traits>
	12	#include <utility>
	13	#include "test_policy.h"
	14
	15	struct Base { int i; };
	16	struct Derived : Base { };
	17
	18	struct Base1 { int i; };
	19	struct Base2 { long l; };
	20	struct DerivedMultiple : Base1, Base2 {
	21	DerivedMultiple(int i) : Base1{i}, Base2{i + 10}
	22	{
	23	}
	24	};
	25
	26	struct Unrelated { };
	27
	28	template <typename Stored, typename From, typename To>
	29	static void
	30	tests()
	31	{
	32	Stored obj1{1};
	33	Stored obj2{2};
	34
	35	// Move-assign non-null to non-null
	36	{
	37	tracked_shared_ptr<From> from(&obj1, libkern::retain);
	38	tracked_shared_ptr<To> to(&obj2, libkern::retain);
	39	tracking_policy::reset();
	40	tracked_shared_ptr<To>& ref = (to = std::move(from));
	41	CHECK(tracking_policy::releases == 1);
	42	CHECK(tracking_policy::retains == 0);
	43	CHECK(&ref == &to);
	44	CHECK(from.get() == nullptr);
	45	CHECK(to.get() == &obj1);
	46	}
	47
	48	// Move-assign non-null to null
	49	{
	50	tracked_shared_ptr<From> from(&obj1, libkern::retain);
	51	tracked_shared_ptr<To> to = nullptr;
	52	tracking_policy::reset();
	53	tracked_shared_ptr<To>& ref = (to = std::move(from));
	54	CHECK(tracking_policy::releases == 0);
	55	CHECK(tracking_policy::retains == 0);
	56	CHECK(&ref == &to);
	57	CHECK(from.get() == nullptr);
	58	CHECK(to.get() == &obj1);
	59	}
	60
	61	// Move-assign null to non-null
	62	{
	63	tracked_shared_ptr<From> from = nullptr;
	64	tracked_shared_ptr<To> to(&obj2, libkern::retain);
65	tracking_policy::reset();
66	tracked_shared_ptr<To>& ref = (to = std::move(from));
67	CHECK(tracking_policy::releases == 1);
68	CHECK(tracking_policy::retains == 0);
69	CHECK(&ref == &to);
70	CHECK(from.get() == nullptr);
71	CHECK(to.get() == nullptr);
72	}
73
74	// Move-assign null to null
75	{
76	tracked_shared_ptr<From> from = nullptr;
77	tracked_shared_ptr<To> to = nullptr;
78	tracking_policy::reset();
79	tracked_shared_ptr<To>& ref = (to = std::move(from));
80	CHECK(tracking_policy::releases == 0);
81	CHECK(tracking_policy::retains == 0);
82	CHECK(&ref == &to);
83	CHECK(from.get() == nullptr);
84	CHECK(to.get() == nullptr);
85	}
86	}
87
88	T_DECL(assign_move, "intrusive_shared_ptr.assign.move") {
89	tests</stored/ Derived, /from/ Derived, /to/ Derived>();
90	tests</stored/ Derived, /from/ Derived, /to/ Derived const>();
91	tests</stored/ Derived, /from/ Derived const, /to/ Derived const>();
92
93	tests</stored/ Derived, /from/ Derived, /to/ Base>();
94	tests</stored/ Derived, /from/ Derived, /to/ Base const>();
95	tests</stored/ Derived, /from/ Derived const, /to/ Base const>();
96
97	tests</stored/ DerivedMultiple, /from/ DerivedMultiple, /to/ Base1>();
98	tests</stored/ DerivedMultiple, /from/ DerivedMultiple const, /to/ Base1 const>();
99
100	tests</stored/ DerivedMultiple, /from/ DerivedMultiple, /to/ Base2>();
101	tests</stored/ DerivedMultiple, /from/ DerivedMultiple const, /to/ Base2 const>();
102
103	// Make sure basic trait querying works
104	static_assert(std::is_move_assignable_v<test_shared_ptr<Derived> >);
105
106	// Make sure downcasts are disabled
107	static_assert(!std::is_assignable_v</to/ test_shared_ptr<Derived>, /from/ test_shared_ptr<Base>&&>);
108	static_assert(!std::is_assignable_v</to/ test_shared_ptr<DerivedMultiple>, /from/ test_shared_ptr<Base1>&&>);
109	static_assert(!std::is_assignable_v</to/ test_shared_ptr<DerivedMultiple>, /from/ test_shared_ptr<Base2>&&>);
110	static_assert(!std::is_assignable_v</to/ test_shared_ptr<Base2>, /from/ test_shared_ptr<Base1>&&>);
111
112	// Make sure const-casting away doesn't work
113	static_assert(!std::is_assignable_v</to/ test_shared_ptr<Derived>, /from/ test_shared_ptr<Derived const>&&>);
114
115	// Make sure casting to unrelated types doesn't work
116	static_assert(!std::is_assignable_v</to/ test_shared_ptr<char>, /from/ test_shared_ptr<Derived>&&>);
117	static_assert(!std::is_assignable_v</to/ test_shared_ptr<Unrelated>, /from/ test_shared_ptr<Derived>&&>);
118	static_assert(!std::is_assignable_v</to/ test_shared_ptr<Base2>, /from/ test_shared_ptr<Base1>&&>);
119
120	// Make sure constructing with different policies doesn't work
121	static_assert(!std::is_assignable_v</to/ libkern::intrusive_shared_ptr<Derived, dummy_policy<2> >, /from/ libkern::intrusive_shared_ptr<Derived, dummy_policy<1> >&&>);
122	}