1 | // RUN: %clang_cc1 -std=c++0x -fsyntax-only -fexceptions -verify %s |
2 | |
3 | struct one { char c[1]; }; |
4 | struct two { char c[2]; }; |
5 | |
6 | namespace std { |
7 | typedef decltype(sizeof(int)) size_t; |
8 | |
9 | // libc++'s implementation |
10 | template <class _E> |
11 | class initializer_list |
12 | { |
13 | const _E* __begin_; |
14 | size_t __size_; |
15 | |
16 | initializer_list(const _E* __b, size_t __s) |
17 | : __begin_(__b), |
18 | __size_(__s) |
19 | {} |
20 | |
21 | public: |
22 | typedef _E value_type; |
23 | typedef const _E& reference; |
24 | typedef const _E& const_reference; |
25 | typedef size_t size_type; |
26 | |
27 | typedef const _E* iterator; |
28 | typedef const _E* const_iterator; |
29 | |
30 | initializer_list() : __begin_(nullptr), __size_(0) {} |
31 | |
32 | size_t size() const {return __size_;} |
33 | const _E* begin() const {return __begin_;} |
34 | const _E* end() const {return __begin_ + __size_;} |
35 | }; |
36 | } |
37 | |
38 | namespace objects { |
39 | |
40 | struct X1 { X1(int); }; |
41 | struct X2 { explicit X2(int); }; // expected-note {{constructor declared here}} |
42 | |
43 | template <int N> |
44 | struct A { |
45 | A() { static_assert(N == 0, ""); } |
46 | A(int, double) { static_assert(N == 1, ""); } |
47 | }; |
48 | |
49 | template <int N> |
50 | struct F { |
51 | F() { static_assert(N == 0, ""); } |
52 | F(int, double) { static_assert(N == 1, ""); } |
53 | F(std::initializer_list<int>) { static_assert(N == 3, ""); } |
54 | }; |
55 | |
56 | template <int N> |
57 | struct D { |
58 | D(std::initializer_list<int>) { static_assert(N == 0, ""); } // expected-note 1 {{candidate}} |
59 | D(std::initializer_list<double>) { static_assert(N == 1, ""); } // expected-note 1 {{candidate}} |
60 | }; |
61 | |
62 | template <int N> |
63 | struct E { |
64 | E(int, int) { static_assert(N == 0, ""); } |
65 | E(X1, int) { static_assert(N == 1, ""); } |
66 | }; |
67 | |
68 | void overload_resolution() { |
69 | { A<0> a{}; } |
70 | { A<0> a = {}; } |
71 | { A<1> a{1, 1.0}; } |
72 | { A<1> a = {1, 1.0}; } |
73 | |
74 | { F<0> f{}; } |
75 | { F<0> f = {}; } |
76 | // Narrowing conversions don't affect viability. The next two choose |
77 | // the initializer_list constructor. |
78 | { F<3> f{1, 1.0}; } // expected-error {{type 'double' cannot be narrowed to 'int' in initializer list}} expected-note {{silence}} |
79 | { F<3> f = {1, 1.0}; } // expected-error {{type 'double' cannot be narrowed to 'int' in initializer list}} expected-note {{silence}} |
80 | { F<3> f{1, 2, 3, 4, 5, 6, 7, 8}; } |
81 | { F<3> f = {1, 2, 3, 4, 5, 6, 7, 8}; } |
82 | { F<3> f{1, 2, 3, 4, 5, 6, 7, 8}; } |
83 | { F<3> f{1, 2}; } |
84 | |
85 | { D<0> d{1, 2, 3}; } |
86 | { D<1> d{1.0, 2.0, 3.0}; } |
87 | { D<-1> d{1, 2.0}; } // expected-error {{ambiguous}} |
88 | |
89 | { E<0> e{1, 2}; } |
90 | } |
91 | |
92 | void explicit_implicit() { |
93 | { X1 x{0}; } |
94 | { X1 x = {0}; } |
95 | { X2 x{0}; } |
96 | { X2 x = {0}; } // expected-error {{constructor is explicit}} |
97 | } |
98 | |
99 | struct C { |
100 | C(); |
101 | C(int, double); |
102 | C(int, int); |
103 | |
104 | int operator[](C); |
105 | }; |
106 | |
107 | C function_call() { |
108 | void takes_C(C); |
109 | takes_C({1, 1.0}); |
110 | |
111 | C c; |
112 | c[{1, 1.0}]; |
113 | |
114 | return {1, 1.0}; |
115 | } |
116 | |
117 | void inline_init() { |
118 | (void) C{1, 1.0}; |
119 | (void) new C{1, 1.0}; |
120 | (void) A<1>{1, 1.0}; |
121 | (void) new A<1>{1, 1.0}; |
122 | } |
123 | |
124 | struct B { // expected-note 2 {{candidate constructor}} |
125 | B(C, int, C); // expected-note {{candidate constructor not viable: cannot convert initializer list argument to 'objects::C'}} |
126 | }; |
127 | |
128 | void nested_init() { |
129 | B b1{{1, 1.0}, 2, {3, 4}}; |
130 | B b2{{1, 1.0, 4}, 2, {3, 4}}; // expected-error {{no matching constructor for initialization of 'objects::B'}} |
131 | } |
132 | |
133 | void overloaded_call() { |
134 | one ov1(B); // expected-note {{not viable: cannot convert initializer list}} |
135 | two ov1(C); // expected-note {{not viable: cannot convert initializer list}} |
136 | |
137 | static_assert(sizeof(ov1({})) == sizeof(two), "bad overload"); |
138 | static_assert(sizeof(ov1({1, 2})) == sizeof(two), "bad overload"); |
139 | static_assert(sizeof(ov1({{1, 1.0}, 2, {3, 4}})) == sizeof(one), "bad overload"); |
140 | |
141 | ov1({1}); // expected-error {{no matching function}} |
142 | |
143 | one ov2(int); |
144 | two ov2(F<3>); |
145 | // expected-warning@+1 {{braces around scalar initializer}} |
146 | static_assert(sizeof(ov2({1})) == sizeof(one), "bad overload"); // list -> int ranks as identity |
147 | static_assert(sizeof(ov2({1, 2, 3})) == sizeof(two), "bad overload"); // list -> F only viable |
148 | } |
149 | |
150 | struct G { // expected-note 6 {{not viable}} |
151 | // This is not an initializer-list constructor. |
152 | template<typename ...T> |
153 | G(std::initializer_list<int>, T ...); // expected-note 3 {{not viable}} |
154 | }; |
155 | |
156 | struct H { // expected-note 6 {{not viable}} |
157 | explicit H(int, int); // expected-note 3 {{not viable}} expected-note {{declared here}} |
158 | H(int, void*); // expected-note 3 {{not viable}} |
159 | }; |
160 | |
161 | void edge_cases() { |
162 | // invalid (the first phase only considers init-list ctors) |
163 | // (for the second phase, no constructor is viable) |
164 | G g1{1, 2, 3}; // expected-error {{no matching constructor}} |
165 | (void) new G{1, 2, 3}; // expected-error {{no matching constructor}} |
166 | (void) G{1, 2, 3} // expected-error {{no matching constructor}} |
167 | |
168 | // valid (T deduced to <>). |
169 | G g2({1, 2, 3}); |
170 | (void) new G({1, 2, 3}); |
171 | (void) G({1, 2, 3}); |
172 | |
173 | // invalid |
174 | H h1({1, 2}); // expected-error {{no matching constructor}} |
175 | (void) new H({1, 2}); // expected-error {{no matching constructor}} |
176 | (void) H({1, 2}); // expected-error {{no matching constructor}} |
177 | |
178 | // valid (by copy constructor). |
179 | H h2({1, nullptr}); |
180 | (void) new H({1, nullptr}); |
181 | (void) H({1, nullptr}); |
182 | |
183 | // valid |
184 | H h3{1, 2}; |
185 | (void) new H{1, 2}; |
186 | (void) H{1, 2}; |
187 | } |
188 | |
189 | struct memberinit { |
190 | H h1{1, nullptr}; |
191 | H h2 = {1, nullptr}; |
192 | H h3{1, 1}; |
193 | H h4 = {1, 1}; // expected-error {{constructor is explicit}} |
194 | }; |
195 | } |
196 | |
197 | namespace PR12092 { |
198 | |
199 | struct S { |
200 | S(const char*); |
201 | }; |
202 | struct V { |
203 | template<typename T> V(T, T); |
204 | void f(std::initializer_list<S>); |
205 | void f(const V &); |
206 | }; |
207 | |
208 | void g() { |
209 | extern V s; |
210 | s.f({"foo", "bar"}); |
211 | } |
212 | |
213 | } |
214 | |
215 | namespace PR12117 { |
216 | struct A { A(int); }; |
217 | struct B { B(A); } b{{0}}; //FIXME: non-conformant. Temporary fix until standard resolution. |
218 | // expected- error {{call to constructor of 'struct B' is ambiguous}} \ |
219 | // expected- note 2{{candidate is the implicit}} \ |
220 | // expected- note {{candidate constructor}} |
221 | struct C { C(int); } c{0}; |
222 | } |
223 | |
224 | namespace PR12167 { |
225 | template<int N> struct string {}; |
226 | |
227 | struct X { |
228 | X(const char v); |
229 | template<typename T> bool operator()(T) const; |
230 | }; |
231 | |
232 | template<int N, class Comparator> bool g(const string<N>& s, Comparator cmp) { |
233 | return cmp(s); |
234 | } |
235 | template<int N> bool f(const string<N> &s) { |
236 | return g(s, X{'x'}); |
237 | } |
238 | |
239 | bool s = f(string<1>()); |
240 | } |
241 | |
242 | namespace PR12257_PR12241 { |
243 | struct command_pair |
244 | { |
245 | command_pair(int, int); |
246 | }; |
247 | |
248 | struct command_map |
249 | { |
250 | command_map(std::initializer_list<command_pair>); |
251 | }; |
252 | |
253 | struct generator_pair |
254 | { |
255 | generator_pair(const command_map); |
256 | }; |
257 | |
258 | // 5 levels: init list, gen_pair, command_map, init list, command_pair |
259 | const std::initializer_list<generator_pair> x = {{{{{3, 4}}}}}; |
260 | |
261 | // 4 levels: init list, gen_pair, command_map via init list, command_pair |
262 | const std::initializer_list<generator_pair> y = {{{{1, 2}}}}; |
263 | } |
264 | |
265 | namespace PR12120 { |
266 | struct A { explicit A(int); A(float); }; // expected-note {{declared here}} |
267 | A a = { 0 }; // expected-error {{constructor is explicit}} |
268 | |
269 | struct B { explicit B(short); B(long); }; // expected-note 4{{candidate}} |
270 | B b = { 0 }; // expected-error {{ambiguous}} |
271 | |
272 | struct C { explicit C(short); C(long); }; // expected-note 2{{candidate}} |
273 | C c = {{ 0 }}; // expected-error {{ambiguous}} |
274 | } |
275 | |
276 | namespace PR12498 { |
277 | class ArrayRef; // expected-note{{forward declaration}} |
278 | |
279 | struct C { |
280 | void foo(const ArrayRef&); // expected-note{{passing argument to parameter here}} |
281 | }; |
282 | |
283 | static void bar(C* c) |
284 | { |
285 | c->foo({ nullptr, 1 }); // expected-error{{initialization of incomplete type 'const PR12498::ArrayRef'}} |
286 | } |
287 | } |
288 | |
289 | namespace explicit_default { |
290 | struct A { |
291 | explicit A(); // expected-note{{here}} |
292 | }; |
293 | A a {}; // ok |
294 | // This is copy-list-initialization, and we choose an explicit constructor |
295 | // (even though we do so via value-initialization), so the initialization is |
296 | // ill-formed. |
297 | A b = {}; // expected-error{{chosen constructor is explicit}} |
298 | } |
299 | |
300 | namespace init_list_default { |
301 | struct A { |
302 | A(std::initializer_list<int>); |
303 | }; |
304 | A a {}; // calls initializer list constructor |
305 | |
306 | struct B { |
307 | B(); |
308 | B(std::initializer_list<int>) = delete; |
309 | }; |
310 | B b {}; // calls default constructor |
311 | } |
312 | |
313 | // PR13470, <rdar://problem/11974632> |
314 | namespace PR13470 { |
315 | struct W { |
316 | explicit W(int); // expected-note {{here}} |
317 | }; |
318 | |
319 | struct X { |
320 | X(const X&) = delete; // expected-note 3 {{here}} |
321 | X(int); |
322 | }; |
323 | |
324 | template<typename T, typename Fn> void call(Fn f) { |
325 | f({1}); // expected-error {{constructor is explicit}} |
326 | f(T{1}); // expected-error {{call to deleted constructor}} |
327 | } |
328 | |
329 | void ref_w(const W &); // expected-note 2 {{not viable}} |
330 | void call_ref_w() { |
331 | ref_w({1}); // expected-error {{no matching function}} |
332 | ref_w(W{1}); |
333 | call<W>(ref_w); // expected-note {{instantiation of}} |
334 | } |
335 | |
336 | void ref_x(const X &); |
337 | void call_ref_x() { |
338 | ref_x({1}); |
339 | ref_x(X{1}); |
340 | call<X>(ref_x); // ok |
341 | } |
342 | |
343 | void val_x(X); // expected-note 2 {{parameter}} |
344 | void call_val_x() { |
345 | val_x({1}); |
346 | val_x(X{1}); // expected-error {{call to deleted constructor}} |
347 | call<X>(val_x); // expected-note {{instantiation of}} |
348 | } |
349 | |
350 | template<typename T> |
351 | struct Y { |
352 | X x{1}; |
353 | void f() { X x{1}; } |
354 | void h() { |
355 | ref_w({1}); // expected-error {{no matching function}} |
356 | ref_w(W{1}); |
357 | ref_x({1}); |
358 | ref_x(X{1}); |
359 | val_x({1}); |
360 | val_x(X{1}); // expected-error {{call to deleted constructor}} |
361 | } |
362 | Y() {} |
363 | Y(int) : x{1} {} |
364 | }; |
365 | |
366 | Y<int> yi; |
367 | Y<int> yi2(0); |
368 | void g() { |
369 | yi.f(); |
370 | yi.h(); // ok, all diagnostics produced in template definition |
371 | } |
372 | } |
373 | |
374 | namespace PR19729 { |
375 | struct A { |
376 | A(int); |
377 | A(const A&) = delete; |
378 | }; |
379 | struct B { |
380 | void *operator new(std::size_t, A); |
381 | }; |
382 | B *p = new ({123}) B; |
383 | } |
384 | |
385 | namespace PR11410 { |
386 | struct A { |
387 | A() = delete; // expected-note 2{{deleted here}} |
388 | A(int); |
389 | }; |
390 | |
391 | A a[3] = { |
392 | {1}, {2} |
393 | }; // expected-error {{call to deleted constructor}} \ |
394 | expected-note {{in implicit initialization of array element 2 with omitted initializer}} |
395 | |
396 | struct B { |
397 | A a; // expected-note {{in implicit initialization of field 'a'}} |
398 | } b = { |
399 | }; // expected-error {{call to deleted constructor}} |
400 | |
401 | struct C { |
402 | C(int = 0); // expected-note 2{{candidate}} |
403 | C(float = 0); // expected-note 2{{candidate}} |
404 | }; |
405 | C c[3] = { |
406 | 0, 1 |
407 | }; // expected-error {{ambiguous}} expected-note {{in implicit initialization of array element 2}} |
408 | C c2[3] = { |
409 | [0] = 1, [2] = 3 |
410 | }; // expected-error {{ambiguous}} expected-note {{in implicit initialization of array element 1}} |
411 | } |
412 | |