1 | // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s |
2 | |
3 | template<typename T, T ...Values> struct value_tuple {}; |
4 | template<typename...> struct tuple { }; |
5 | template<typename T, typename U> struct pair { }; |
6 | |
7 | template<typename T, T Value> struct value_c; |
8 | |
9 | template<typename T, typename U> |
10 | struct is_same { |
11 | static const bool value = false; |
12 | }; |
13 | |
14 | template<typename T> |
15 | struct is_same<T, T> { |
16 | static const bool value = true; |
17 | }; |
18 | |
19 | template<typename T> |
20 | struct X0 { |
21 | template<T ...Values> |
22 | void f(value_tuple<T, Values...> * = 0); |
23 | }; |
24 | |
25 | void test_X0() { |
26 | X0<int>().f<1, 2, 3, 4, 5>(); |
27 | } |
28 | |
29 | namespace PacksAtDifferentLevels { |
30 | |
31 | template<typename ...Types> |
32 | struct X { |
33 | template<typename> struct Inner { |
34 | static const unsigned value = 1; |
35 | }; |
36 | |
37 | template<typename ...YTypes> |
38 | struct Inner<tuple<pair<Types, YTypes>...> > { |
39 | static const unsigned value = sizeof...(Types) - sizeof...(YTypes); |
40 | }; |
41 | }; |
42 | |
43 | int check0[X<short, int, long>::Inner<tuple<pair<short, unsigned short>, |
44 | pair<int, unsigned int>, |
45 | pair<long, unsigned long>> |
46 | >::value == 0? 1 : -1]; |
47 | |
48 | int check1[X<short, int>::Inner<tuple<pair<short, unsigned short>, |
49 | pair<int, unsigned int>, |
50 | pair<long, unsigned long>> |
51 | >::value == 1? 1 : -1]; |
52 | |
53 | template<unsigned ...Values> struct unsigned_tuple { }; |
54 | template<typename ...Types> |
55 | struct X1 { |
56 | template<typename, typename> struct Inner { |
57 | static const unsigned value = 0; |
58 | }; |
59 | |
60 | template<typename ...YTypes> |
61 | struct Inner<tuple<pair<Types, YTypes>...>, |
62 | unsigned_tuple<sizeof(Types) + sizeof(YTypes)...>> { |
63 | static const unsigned value = 1; |
64 | }; |
65 | }; |
66 | |
67 | int check2[X1<short, int, long>::Inner<tuple<pair<short, unsigned short>, |
68 | pair<int, unsigned int>, |
69 | pair<long, unsigned long>>, |
70 | unsigned_tuple<sizeof(short) + sizeof(unsigned short), |
71 | sizeof(int) + sizeof(unsigned int), |
72 | sizeof(long) + sizeof(unsigned long)> |
73 | >::value == 1? 1 : -1]; |
74 | int check3[X1<short, int>::Inner<tuple<pair<short, unsigned short>, |
75 | pair<int, unsigned int>, |
76 | pair<long, unsigned long>>, |
77 | unsigned_tuple<sizeof(short) + sizeof(unsigned short), |
78 | sizeof(int) + sizeof(unsigned int), |
79 | sizeof(long) + sizeof(unsigned long)> |
80 | >::value == 0? 1 : -1]; |
81 | |
82 | template<typename ...Types> |
83 | struct X2 { |
84 | template<typename> struct Inner { |
85 | static const unsigned value = 1; |
86 | }; |
87 | |
88 | template<typename R, typename ...YTypes> |
89 | struct Inner<R(pair<Types, YTypes>...)> { |
90 | static const unsigned value = sizeof...(Types) - sizeof...(YTypes); |
91 | }; |
92 | }; |
93 | |
94 | int check4[X2<short, int, long>::Inner<int(pair<short, unsigned short>, |
95 | pair<int, unsigned int>, |
96 | pair<long, unsigned long>) |
97 | >::value == 0? 1 : -1]; |
98 | |
99 | int check5[X2<short, int>::Inner<int(pair<short, unsigned short>, |
100 | pair<int, unsigned int>, |
101 | pair<long, unsigned long>) |
102 | >::value == 1? 1 : -1]; |
103 | |
104 | template<typename T, typename U> |
105 | struct some_function_object { |
106 | template<typename> |
107 | struct result_of; |
108 | }; |
109 | |
110 | template<template<class> class...> struct metafun_tuple { }; |
111 | |
112 | template<typename ...Types1> |
113 | struct X3 { |
114 | template<typename, typename> struct Inner { |
115 | static const unsigned value = 0; |
116 | }; |
117 | |
118 | template<typename ...Types2> |
119 | struct Inner<tuple<pair<Types1, Types2>...>, |
120 | metafun_tuple<some_function_object<Types1, Types2>::template result_of...> > { |
121 | static const unsigned value = 1; |
122 | }; |
123 | }; |
124 | |
125 | int check6[X3<short, int, long>::Inner<tuple<pair<short, unsigned short>, |
126 | pair<int, unsigned int>, |
127 | pair<long, unsigned long>>, |
128 | metafun_tuple< |
129 | some_function_object<short, unsigned short>::result_of, |
130 | some_function_object<int, unsigned int>::result_of, |
131 | some_function_object<long, unsigned long>::result_of> |
132 | >::value == 1? 1 : -1]; |
133 | int check7[X3<short, int>::Inner<tuple<pair<short, unsigned short>, |
134 | pair<int, unsigned int>, |
135 | pair<long, unsigned long>>, |
136 | metafun_tuple< |
137 | some_function_object<short, unsigned short>::result_of, |
138 | some_function_object<int, unsigned int>::result_of, |
139 | some_function_object<long, unsigned long>::result_of> |
140 | >::value == 0? 1 : -1]; |
141 | |
142 | template<unsigned I, unsigned J> struct unsigned_pair { }; |
143 | |
144 | template<unsigned ...Values1> |
145 | struct X4 { |
146 | template<typename> struct Inner { |
147 | static const unsigned value = 0; |
148 | }; |
149 | |
150 | template<unsigned ...Values2> |
151 | struct Inner<tuple<unsigned_pair<Values1, Values2>...>> { |
152 | static const unsigned value = 1; |
153 | }; |
154 | }; |
155 | |
156 | int check8[X4<1, 3, 5>::Inner<tuple<unsigned_pair<1, 2>, |
157 | unsigned_pair<3, 4>, |
158 | unsigned_pair<5, 6>> |
159 | >::value == 1? 1 : -1]; |
160 | int check9[X4<1, 3>::Inner<tuple<unsigned_pair<1, 2>, |
161 | unsigned_pair<3, 4>, |
162 | unsigned_pair<5, 6>> |
163 | >::value == 0? 1 : -1]; |
164 | |
165 | template<class> struct add_reference; |
166 | template<class> struct add_pointer; |
167 | template<class> struct add_const; |
168 | |
169 | template<template<class> class ...Templates> |
170 | struct X5 { |
171 | template<typename> struct Inner { |
172 | static const unsigned value = 0; |
173 | }; |
174 | |
175 | template<typename ...Types> |
176 | struct Inner<tuple<Templates<Types>...>> { |
177 | static const unsigned value = 1; |
178 | }; |
179 | }; |
180 | |
181 | int check10[X5<add_reference, add_pointer, add_const> |
182 | ::Inner<tuple<add_reference<int>, |
183 | add_pointer<float>, |
184 | add_const<double>>>::value == 1? 1 : -1]; |
185 | int check11[X5<add_reference, add_pointer> |
186 | ::Inner<tuple<add_reference<int>, |
187 | add_pointer<float>, |
188 | add_const<double>>>::value == 0? 1 : -1]; |
189 | |
190 | namespace PR13811 { |
191 | constexpr int g(int n, int m) { return n * 10 + m; } |
192 | |
193 | template<typename...A> |
194 | struct X6 { |
195 | template<typename...B> |
196 | constexpr auto f1(A ...a) const -> decltype(g(A(a + B())...)) { return g(A(a + B())...); } |
197 | |
198 | template<typename...B> |
199 | constexpr auto f2(A ...a, B ...b) const -> decltype(g((&a)[b] ...)) { return g((&a)[b] ...); } // expected-note {{past-the-end}} |
200 | |
201 | template<typename...B> struct Inner { |
202 | template<typename...C> |
203 | constexpr auto f(A ...a, B ...b, C ...c) const -> decltype(g(a+b+c...)) { return g(a+b+c...); } |
204 | }; |
205 | }; |
206 | struct A { constexpr operator int() const { return 2; } }; |
207 | struct B { constexpr operator int() const { return 1; } }; |
208 | |
209 | static_assert(X6<unsigned char, int>().f1<A, B>(255, 1) == 12, ""); |
210 | static_assert(X6<int, int>().f2(3, 4, 0, 0) == 34, ""); |
211 | static_assert(X6<int, int>().f2(3, 4, 0, 1) == 34, ""); // expected-error {{constant expression}} expected-note {{in call}} |
212 | static_assert(X6<int, int>::Inner<int, int>().f(1, 2, 3, 4, 5, 6) == 102, ""); |
213 | } |
214 | } |
215 | |
216 | namespace ExpandingNonTypeTemplateParameters { |
217 | template<typename ...Types> |
218 | struct tuple_of_values { |
219 | template<Types ...Values> // expected-error{{a non-type template parameter cannot have type 'float'}} \ |
220 | // expected-note{{template parameter is declared here}} |
221 | struct apply { // expected-note 2{{template is declared here}} |
222 | typedef tuple<value_c<Types, Values>...> type; |
223 | }; |
224 | }; |
225 | |
226 | int i; |
227 | float f; |
228 | int check_tuple_of_values_1[ |
229 | is_same<tuple_of_values<int&, float&, char, int>::apply<i, f, 'a', 17> |
230 | ::type, |
231 | tuple<value_c<int&, i>, value_c<float&, f>, value_c<char, 'a'>, |
232 | value_c<int, 17>> |
233 | >::value? 1 : -1]; |
234 | |
235 | tuple_of_values<int, float> tv1; // expected-note{{in instantiation of template class 'ExpandingNonTypeTemplateParameters::tuple_of_values<int, float>' requested here}} |
236 | |
237 | tuple_of_values<int&, float&>::apply<i, i>::type tv2; // expected-error{{non-type template parameter of reference type 'float &' cannot bind to template argument of type 'int'}} |
238 | |
239 | tuple_of_values<int&, float&>::apply<i>::type tv3; // expected-error{{too few template arguments for class template 'apply'}} |
240 | |
241 | tuple_of_values<int&, float&>::apply<i, f, i>::type tv4; // expected-error{{too many template arguments for class template 'apply'}} |
242 | } |
243 | |
244 | namespace ExpandingFunctionParameters { |
245 | template<typename ...T> |
246 | struct X0 { |
247 | typedef int type; |
248 | }; |
249 | |
250 | template<typename ...T> |
251 | struct X1 { |
252 | template<typename ... U> |
253 | typename X0<T(T, U...)...>::type f(U...); |
254 | }; |
255 | |
256 | void test() { |
257 | X1<float> x1; |
258 | x1.f(17, 3.14159); |
259 | } |
260 | } |
261 | |
262 | namespace PR10230 { |
263 | template<typename> |
264 | struct s |
265 | { |
266 | template<typename... Args> |
267 | auto f() -> int(&)[sizeof...(Args)]; |
268 | }; |
269 | |
270 | void main() |
271 | { |
272 | int (&ir1)[1] = s<int>().f<int>(); |
273 | int (&ir3)[3] = s<int>().f<int, float, double>(); |
274 | } |
275 | } |
276 | |
277 | namespace PR13386 { |
278 | template<typename...> struct tuple {}; |
279 | template<typename...T> |
280 | struct S { |
281 | template<typename...U> |
282 | void f(T &&...t, U &&...u) {} // expected-note {{candidate}} |
283 | template<typename...U> |
284 | void g(U &&...u, T &&...t) {} // expected-note {{candidate}} |
285 | template<typename...U> |
286 | void h(tuple<T, U> &&...) {} // expected-note 2{{candidate}} |
287 | |
288 | template<typename...U> |
289 | struct X { |
290 | template<typename...V> |
291 | void x(tuple<T, U, V> &&...); // expected-error {{different lengths}} |
292 | }; |
293 | }; |
294 | |
295 | void test() { |
296 | S<>().f(); |
297 | S<>().f(0); |
298 | S<int>().f(0); |
299 | S<int>().f(0, 1); |
300 | S<int, int>().f(0); // expected-error {{no matching member function for call}} |
301 | |
302 | S<>().g(); |
303 | S<>().g(0); |
304 | S<int>().g(0); |
305 | S<int>().g(0, 1); // expected-error {{no matching member function for call}} |
306 | S<int>().g<int>(0, 1); |
307 | S<int, int>().g(0, 1); |
308 | |
309 | S<>().h(); |
310 | S<>().h(0); // expected-error {{no matching member function for call}} |
311 | S<int>().h({}); // expected-error {{no matching member function for call}} |
312 | S<int>().h<int>({}); |
313 | S<int>().h(tuple<int,int>{}); |
314 | S<int, int>().h(tuple<int,int>{}, tuple<int,int>{}); |
315 | |
316 | S<int, int>::X<char>(); // expected-note {{here}} |
317 | } |
318 | } |
319 | |