1 // 2 // Tests for 3 // template<typename To, typename From, typename R> 4 // intrusive_shared_ptr<To, R> const_pointer_cast(intrusive_shared_ptr<From, R> const& ptr) noexcept; 5 // 6 // template<typename To, typename From, typename R> 7 // intrusive_shared_ptr<To, R> const_pointer_cast(intrusive_shared_ptr<From, R>&& ptr) noexcept 8 // 9 10 #include <libkern/c++/intrusive_shared_ptr.h> 11 #include <utility> 12 #include <darwintest.h> 13 #include "test_policy.h" 14 15 struct T { int i; }; 16 17 template <typename Stored, typename From, typename To> 18 static void 19 tests() 20 { 21 Stored obj{3}; 22 23 { 24 tracked_shared_ptr<From> const from(&obj, libkern::no_retain); 25 tracking_policy::reset(); 26 tracked_shared_ptr<To> to = libkern::const_pointer_cast<To>(from); 27 CHECK(tracking_policy::retains == 1); 28 CHECK(tracking_policy::releases == 0); 29 CHECK(to.get() == const_cast<To*>(&obj)); 30 CHECK(from.get() == &obj); 31 } 32 { 33 tracked_shared_ptr<From> from(&obj, libkern::no_retain); 34 tracking_policy::reset(); 35 tracked_shared_ptr<To> to = libkern::const_pointer_cast<To>(std::move(from)); 36 CHECK(tracking_policy::retains == 0); 37 CHECK(tracking_policy::releases == 0); 38 CHECK(to.get() == const_cast<To*>(&obj)); 39 CHECK(from.get() == nullptr); 40 } 41 42 // Test `const_pointer_cast`ing a null pointer 43 { 44 tracked_shared_ptr<From> const from = nullptr; 45 tracking_policy::reset(); 46 tracked_shared_ptr<To> to = libkern::const_pointer_cast<To>(from); 47 CHECK(tracking_policy::retains == 0); 48 CHECK(tracking_policy::releases == 0); 49 CHECK(to.get() == nullptr); 50 CHECK(from.get() == nullptr); 51 } 52 { 53 tracked_shared_ptr<From> from = nullptr; 54 tracking_policy::reset(); 55 tracked_shared_ptr<To> to = libkern::const_pointer_cast<To>(std::move(from)); 56 CHECK(tracking_policy::retains == 0); 57 CHECK(tracking_policy::releases == 0); 58 CHECK(to.get() == nullptr); 59 CHECK(from.get() == nullptr); 60 } 61 } 62 63 T_DECL(cast_const, "intrusive_shared_ptr.cast.const") { 64 tests</*stored*/ T, /*from*/ T, /*to*/ T>(); 65 tests</*stored*/ T, /*from*/ T, /*to*/ T const>(); 66 tests</*stored*/ T, /*from*/ T const, /*to*/ T>(); 67 } 68