1// RUN: %clang_cc1 -fobjc-runtime-has-weak -fsyntax-only -fobjc-arc -verify -fblocks -std=c++11 %s
2
3#define CONSUMED __attribute__((ns_consumed))
4#define PRODUCED __attribute__((ns_returns_retained))
5
6@interface A
7@end
8
9@class NSString;
10
11template<typename T, typename U>
12struct is_same {
13  static const bool value = false;
14};
15
16template<typename T>
17struct is_same<T, T> {
18  static const bool value = true;
19};
20
21// Instantiation for reference/pointer types that will get lifetime
22// adjustments.
23template<typename T>
24struct X0 {
25  typedef T* pointer; // okay: ends up being strong.
26  typedef T& reference; // okay: ends up being strong
27};
28
29void test_X0() {
30  X0<id> x0id;
31  X0<A*> x0a;
32  X0<__strong A*> x0sa;
33
34  id __strong *ptr;
35  id __strong val;
36  X0<__strong id>::pointer &ptr_ref = ptr;
37  X0<__strong id>::reference ref = val;
38}
39
40int check_infer_strong[is_same<id, __strong id>::value? 1 : -1];
41
42// Check template argument deduction (e.g., for specialization) using
43// lifetime qualifiers.
44template<typename T>
45struct is_pointer_strong {
46  static const bool value = false;
47};
48
49template<typename T>
50struct is_pointer_strong<__strong T*> {
51  static const bool value = true;
52};
53
54int check_ptr_strong1[is_pointer_strong<__strong id*>::value? 1 : -1];
55int check_ptr_strong2[is_pointer_strong<__weak id*>::value? -1 : 1];
56int check_ptr_strong3[is_pointer_strong<__autoreleasing id*>::value? -1 : 1];
57int check_ptr_strong4[is_pointer_strong<__unsafe_unretained id*>::value? -1 : 1];
58int check_ptr_strong5[is_pointer_strong<id>::value? -1 : 1];
59
60// Check substitution into lifetime-qualified dependent types.
61template<typename T>
62struct make_strong_pointer {
63  typedef __strong T *type;
64};
65
66template<typename T>
67struct make_strong_pointer<__weak T> {
68  typedef __strong T *type;
69};
70
71template<typename T>
72struct make_strong_pointer<__autoreleasing T> {
73  typedef __strong T *type;
74};
75
76template<typename T>
77struct make_strong_pointer<__unsafe_unretained T> {
78  typedef __strong T *type;
79};
80
81// Adding qualifiers
82int check_make_strong1[is_same<make_strong_pointer<id>::type, __strong id *>::value ? 1 : -1];
83int check_make_strong2[is_same<make_strong_pointer<A*>::type, A* __strong *>::value ? 1 : -1];
84
85// Adding redundant qualifiers
86int check_make_strong3[is_same<make_strong_pointer<__strong id>::type, __strong id *>::value ? 1 : -1];
87int check_make_strong4[is_same<make_strong_pointer<__strong A*>::type, A* __strong *>::value ? 1 : -1];
88
89// Adding nonsensical qualifiers.
90int check_make_strong5[is_same<make_strong_pointer<int>::type, int *>::value ? 1 : -1];
91int check_make_strong6[is_same<make_strong_pointer<__weak id>::type, __strong id *>::value ? 1 : -1];
92
93template<typename T>
94struct make_weak {
95  typedef __weak T type;
96};
97
98int check_make_weak0[is_same<make_weak<id>::type, __weak id>::value? 1 : -1];
99int check_make_weak1[is_same<make_weak<__strong id>::type, __weak id>::value? 1 : -1];
100int check_make_weak2[is_same<make_weak<__autoreleasing id>::type, __weak id>::value? 1 : -1];
101
102template<typename T>
103struct make_weak_fail {
104  typedef T T_type;
105  typedef __weak T_type type; // expected-error{{the type 'make_weak_fail<__weak id>::T_type' (aka '__weak id') is already explicitly ownership-qualified}} \
106  // expected-error{{the type 'make_weak_fail<id>::T_type' (aka '__strong id') is already explicitly ownership-qualified}}
107};
108
109int check_make_weak_fail0[is_same<make_weak_fail<__weak id>::type, __weak id>::value? 1 : -1]; // expected-note{{in instantiation of template class 'make_weak_fail<__weak id>' requested here}}
110
111int check_make_weak_fail1[is_same<make_weak_fail<id>::type, __weak id>::value? -1 : 1]; // expected-note{{in instantiation of template class 'make_weak_fail<id>' requested here}}
112
113// Check template argument deduction from function templates.
114template<typename T> struct identity { };
115
116template<typename T> identity<T> accept_strong_ptr(__strong T*);
117template<typename T> identity<T> accept_strong_ref(__strong T&);
118
119template<typename T> identity<T> accept_any_ptr(T*);
120template<typename T> identity<T> accept_any_ref(T&);
121
122void test_func_deduction_id() {
123  __strong id *sip;
124  __weak id *wip;
125  __autoreleasing id *aip;
126  __unsafe_unretained id *uip;
127
128  identity<id> res1 = accept_strong_ptr(sip);
129  identity<__strong id> res2 = accept_any_ptr(sip);
130
131  __strong id si;
132  __weak id wi;
133  __autoreleasing id ai;
134  __unsafe_unretained id ui;
135  identity<id> res3 = accept_strong_ref(si);
136  identity<__strong id> res4 = accept_any_ref(si);
137  identity<__weak id> res5 = accept_any_ref(wi);
138  identity<__autoreleasing id> res6 = accept_any_ref(ai);
139  identity<__unsafe_unretained id> res7 = accept_any_ref(ui);
140}
141
142void test_func_deduction_A() {
143  __strong A * *sip;
144  __weak A * *wip;
145  __autoreleasing A * *aip;
146  __unsafe_unretained A * *uip;
147
148  identity<A *> res1 = accept_strong_ptr(sip);
149  identity<__strong A *> res2 = accept_any_ptr(sip);
150
151  __strong A * si;
152  __weak A * wi;
153  __autoreleasing A * ai;
154  __unsafe_unretained A * ui;
155  identity<A *> res3 = accept_strong_ref(si);
156  identity<__strong A *> res4 = accept_any_ref(si);
157  identity<__weak A *> res5 = accept_any_ref(wi);
158  identity<__autoreleasing A *> res6 = accept_any_ref(ai);
159  identity<__unsafe_unretained A *> res7 = accept_any_ref(ui);
160}
161
162// Test partial ordering (qualified vs. non-qualified).
163template<typename T>
164struct classify_pointer_pointer {
165  static const unsigned value = 0;
166};
167
168template<typename T>
169struct classify_pointer_pointer<T*> {
170  static const unsigned value = 1;
171};
172
173template<typename T>
174struct classify_pointer_pointer<__strong T*> {
175  static const unsigned value = 2;
176};
177
178template<typename T>
179struct classify_pointer_pointer<__weak T*> {
180  static const unsigned value = 3;
181};
182
183template<typename T>
184struct classify_pointer_pointer<T&> {
185  static const unsigned value = 4;
186};
187
188template<typename T>
189struct classify_pointer_pointer<__strong T&> {
190  static const unsigned value = 5;
191};
192
193template<typename T>
194struct classify_pointer_pointer<__weak T&> {
195  static const unsigned value = 6;
196};
197
198int classify_ptr1[classify_pointer_pointer<int>::value == 0? 1 : -1];
199int classify_ptr2[classify_pointer_pointer<int *>::value == 1? 1 : -1];
200int classify_ptr3[classify_pointer_pointer<id __strong *>::value == 2? 1 : -1];
201int classify_ptr4[classify_pointer_pointer<id __weak *>::value == 3? 1 : -1];
202int classify_ptr5[classify_pointer_pointer<int&>::value == 4? 1 : -1];
203int classify_ptr6[classify_pointer_pointer<id __strong&>::value == 5? 1 : -1];
204int classify_ptr7[classify_pointer_pointer<id __weak&>::value == 6? 1 : -1];
205int classify_ptr8[classify_pointer_pointer<id __autoreleasing&>::value == 4? 1 : -1];
206int classify_ptr9[classify_pointer_pointer<id __unsafe_unretained&>::value == 4? 1 : -1];
207int classify_ptr10[classify_pointer_pointer<id __autoreleasing *>::value == 1? 1 : -1];
208int classify_ptr11[classify_pointer_pointer<id __unsafe_unretained *>::value == 1? 1 : -1];
209int classify_ptr12[classify_pointer_pointer<int *>::value == 1? 1 : -1];
210int classify_ptr13[classify_pointer_pointer<A * __strong *>::value == 2? 1 : -1];
211int classify_ptr14[classify_pointer_pointer<A * __weak *>::value == 3? 1 : -1];
212int classify_ptr15[classify_pointer_pointer<int&>::value == 4? 1 : -1];
213int classify_ptr16[classify_pointer_pointer<A * __strong&>::value == 5? 1 : -1];
214int classify_ptr17[classify_pointer_pointer<A * __weak&>::value == 6? 1 : -1];
215int classify_ptr18[classify_pointer_pointer<A * __autoreleasing&>::value == 4? 1 : -1];
216int classify_ptr19[classify_pointer_pointer<A * __unsafe_unretained&>::value == 4? 1 : -1];
217int classify_ptr20[classify_pointer_pointer<A * __autoreleasing *>::value == 1? 1 : -1];
218int classify_ptr21[classify_pointer_pointer<A * __unsafe_unretained *>::value == 1? 1 : -1];
219
220template<typename T> int& qual_vs_unqual_ptr(__strong T*);
221template<typename T> double& qual_vs_unqual_ptr(__weak T*);
222template<typename T> float& qual_vs_unqual_ptr(T*);
223template<typename T> int& qual_vs_unqual_ref(__strong T&);
224template<typename T> double& qual_vs_unqual_ref(__weak T&);
225template<typename T> float& qual_vs_unqual_ref(T&);
226
227void test_qual_vs_unqual_id() {
228  __strong id *sip;
229  __weak id *wip;
230  __autoreleasing id *aip;
231  __unsafe_unretained id *uip;
232
233  int &ir1 = qual_vs_unqual_ptr(sip);
234  double &dr1 = qual_vs_unqual_ptr(wip);
235  float &fr1 = qual_vs_unqual_ptr(aip);
236  float &fr2 = qual_vs_unqual_ptr(uip);
237
238  int &ir2 = qual_vs_unqual_ref(*sip);
239  double &dr2 = qual_vs_unqual_ref(*wip);
240  float &fr3 = qual_vs_unqual_ref(*aip);
241  float &fr4 = qual_vs_unqual_ref(*uip);
242}
243
244void test_qual_vs_unqual_a() {
245  __strong A * *sap;
246  __weak A * *wap;
247  __autoreleasing A * *aap;
248  __unsafe_unretained A * *uap;
249
250  int &ir1 = qual_vs_unqual_ptr(sap);
251  double &dr1 = qual_vs_unqual_ptr(wap);
252  float &fr1 = qual_vs_unqual_ptr(aap);
253  float &fr2 = qual_vs_unqual_ptr(uap);
254
255  int &ir2 = qual_vs_unqual_ref(*sap);
256  double &dr2 = qual_vs_unqual_ref(*wap);
257  float &fr3 = qual_vs_unqual_ref(*aap);
258  float &fr4 = qual_vs_unqual_ref(*uap);
259}
260
261namespace rdar9828157 {
262  // Template argument deduction involving lifetime qualifiers and
263  // non-lifetime types.
264  class A { };
265
266  template<typename T> float& f(T&);
267  template<typename T> int& f(__strong T&);
268  template<typename T> double& f(__weak T&);
269
270  void test_f(A* ap) {
271    float &fr = (f)(ap);
272  }
273}
274
275namespace rdar10862386 {
276  // More deduction with lifetime qualifiers.
277  template <typename T>
278  int testing(const T &) {
279      return 1;
280  }
281
282  void test() {
283     testing(1);
284      testing("hi");
285      testing<NSString *>(@"hi");
286      testing(@"hi");
287 }
288}
289
290namespace rdar12367446 {
291  template <class T> class A;
292  template <class R> class A<R()> {};
293
294  void test() {
295    A<id()> value;
296  }
297}
298
299namespace rdar14467941 {
300  template<typename T> int &takePtr(const T &);
301  template<typename T> float &takePtr(T * const &);
302
303  void testTakePtr(A *a) {
304    float &fr1 = takePtr(a);
305    float &fr2 = takePtr<A>(a);
306  }
307}
308
309namespace rdar15713945 {
310  template <class T> int &f(__strong T &);
311  template <class T> float &f(__weak T &);
312  template <class T> double &f(__unsafe_unretained T &);
313  template <class T> char &f(T &);
314
315  void foo() {
316    __strong NSString * const strong = 0;
317    int &ir = (f)(strong);
318    __weak NSString * const weak = 0;
319    float &fr = (f)(weak);
320    __unsafe_unretained NSString * const unsafe = 0;
321    double &dr = (f)(unsafe);
322  }
323}
324
325namespace consumed {
326  void take_yes_no(void (&)(id CONSUMED, id)); // expected-note 2 {{candidate function not viable}}
327  void take_no_yes(void (&)(id, CONSUMED id)); // expected-note 2 {{candidate function not viable}}
328  void take_yes_yes(void (&)(CONSUMED id, CONSUMED id)); // expected-note 2 {{candidate function not viable}}
329
330  template <class... As> void consumes_first(id CONSUMED, As...);
331  void test1() {
332    take_yes_no(consumes_first<id>);
333    take_no_yes(consumes_first<id>); // expected-error {{no matching function}}
334    take_yes_yes(consumes_first<id>); // expected-error {{no matching function}}
335  }
336
337  template <class... As> void consumes_rest(id, CONSUMED As...);
338  void test2() {
339    take_yes_no(consumes_rest<id>); // expected-error {{no matching function}}
340    take_no_yes(consumes_rest<id>);
341    take_yes_yes(consumes_rest<id>); // expected-error {{no matching function}}
342  }
343
344  template <class T, class U> void consumes_two(CONSUMED T, CONSUMED U);
345  void test3() {
346    take_yes_no(consumes_two); // expected-error {{no matching function}}
347    take_no_yes(consumes_two); // expected-error {{no matching function}}
348    take_yes_yes(consumes_two);
349  }
350}
351
352namespace consumed_nested {
353  void take_yes_no(void (&)(id CONSUMED, id)); // expected-note 4 {{candidate function not viable}}
354  void take_no_yes(void (&)(id, CONSUMED id)); // expected-note 4 {{candidate function not viable}}
355  void take_yes_yes(void (&)(CONSUMED id, CONSUMED id)); // expected-note 4 {{candidate function not viable}}
356
357  template <unsigned N> struct consumes_first {
358    template <class... As> static void fn(id CONSUMED, As...);
359  };
360  void test1() {
361    take_yes_no(consumes_first<1>::fn<id>);
362    take_no_yes(consumes_first<2>::fn<id>); // expected-error {{no matching function}}
363    take_yes_yes(consumes_first<3>::fn<id>); // expected-error {{no matching function}}
364    take_yes_no(consumes_first<4>::fn);
365    take_no_yes(consumes_first<5>::fn); // expected-error {{no matching function}}
366    take_yes_yes(consumes_first<6>::fn); // expected-error {{no matching function}}
367  }
368
369  template <unsigned N> struct consumes_rest {
370    template <class... As> static void fn(id, CONSUMED As...);
371  };
372  void test2() {
373    take_yes_no(consumes_rest<1>::fn<id>); // expected-error {{no matching function}}
374    take_no_yes(consumes_rest<2>::fn<id>);
375    take_yes_yes(consumes_rest<3>::fn<id>); // expected-error {{no matching function}}
376    take_yes_no(consumes_rest<4>::fn<id>); // expected-error {{no matching function}}
377    take_no_yes(consumes_rest<5>::fn<id>);
378    take_yes_yes(consumes_rest<6>::fn<id>); // expected-error {{no matching function}}
379  }
380
381  template <unsigned N> struct consumes_two {
382    template <class T, class U> static void fn(CONSUMED T, CONSUMED U);
383  };
384  void test3() {
385    take_yes_no(consumes_two<1>::fn<id, id>); // expected-error {{no matching function}}
386    take_no_yes(consumes_two<2>::fn<id, id>); // expected-error {{no matching function}}
387    take_yes_yes(consumes_two<3>::fn<id, id>);
388    take_yes_no(consumes_two<1>::fn); // expected-error {{no matching function}}
389    take_no_yes(consumes_two<2>::fn); // expected-error {{no matching function}}
390    take_yes_yes(consumes_two<3>::fn);
391  }
392}
393
394namespace produced {
395  void take_yes(PRODUCED id (&)()); // expected-note 2 {{candidate function not viable}}
396  void take_no(id (&)()); // expected-note 2 {{candidate function not viable}}
397
398  template <class T> T non_produces1();
399  template <class T> T non_produces2();
400  template <class T> T non_produces3();
401  template <class T> T non_produces4();
402  void test1() {
403    take_yes(non_produces1<id>); // expected-error {{no matching function}}
404    take_yes(non_produces2); // expected-error {{no matching function}}
405    take_no(non_produces3<id>);
406    take_no(non_produces4);
407  }
408
409  template <class T> PRODUCED T produces1();
410  template <class T> PRODUCED T produces2();
411  template <class T> PRODUCED T produces3();
412  template <class T> PRODUCED T produces4();
413  void test2() {
414    take_yes(produces1<id>);
415    take_yes(produces2);
416    take_no(produces3<id>); // expected-error {{no matching function}}
417    take_no(produces4); // expected-error {{no matching function}}
418  }
419}
420
421namespace produced_nested {
422  void take_yes(PRODUCED id (&)()); // expected-note 2 {{candidate function not viable}}
423  void take_no(id (&)()); // expected-note 2 {{candidate function not viable}}
424
425  template <unsigned N> struct non_produces {
426    template <class T> static T fn();
427  };
428  void test1() {
429    take_yes(non_produces<1>::fn<id>); // expected-error {{no matching function}}
430    take_yes(non_produces<2>::fn); // expected-error {{no matching function}}
431    take_no(non_produces<3>::fn<id>);
432    take_no(non_produces<4>::fn);
433  }
434
435  template <unsigned N> struct produces {
436    template <class T> static PRODUCED T fn();
437  };
438  void test2() {
439    take_yes(produces<1>::fn<id>);
440    take_yes(produces<2>::fn);
441    take_no(produces<3>::fn<id>); // expected-error {{no matching function}}
442    take_no(produces<4>::fn); // expected-error {{no matching function}}
443  }
444}
445
446namespace instantiate_consumed {
447  template <class T> void take(CONSUMED T t) {} // expected-note {{candidate template ignored: substitution failure [with T = int]: ns_consumed attribute only applies to Objective-C object parameters}}
448  void test() {
449    take((id) 0);
450    take((int) 0); // expected-error {{no matching function for call to 'take'}}
451  }
452}
453