1// RUN: %clang_cc1 -fsyntax-only -verify %s
2// RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s
3// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
4
5template<typename T>
6class C { C(int a0 = 0); };
7
8template<>
9C<char>::C(int a0);
10
11struct S { }; // expected-note 3 {{candidate constructor (the implicit copy constructor)}}
12#if __cplusplus >= 201103L // C++11 or later
13// expected-note@-2 3 {{candidate constructor (the implicit move constructor) not viable}}
14#endif
15
16template<typename T> void f1(T a, T b = 10) { } // expected-error{{no viable conversion}} \
17// expected-note{{passing argument to parameter 'b' here}}
18
19template<typename T> void f2(T a, T b = T()) { }
20
21template<typename T> void f3(T a, T b = T() + T()); // expected-error{{invalid operands to binary expression ('S' and 'S')}}
22
23void g() {
24  f1(10);
25  f1(S()); // expected-note{{in instantiation of default function argument expression for 'f1<S>' required here}}
26
27  f2(10);
28  f2(S());
29
30  f3(10);
31  f3(S()); // expected-note{{in instantiation of default function argument expression for 'f3<S>' required here}}
32}
33
34template<typename T> struct F {
35  F(T t = 10); // expected-error{{no viable conversion}} \
36  // expected-note{{passing argument to parameter 't' here}}
37  void f(T t = 10); // expected-error{{no viable conversion}} \
38  // expected-note{{passing argument to parameter 't' here}}
39};
40
41struct FD : F<int> { };
42
43void g2() {
44  F<int> f;
45  FD fd;
46}
47
48void g3(F<int> f, F<struct S> s) {
49  f.f();
50  s.f(); // expected-note{{in instantiation of default function argument expression for 'f<S>' required here}}
51
52  F<int> f2;
53  F<S> s2; // expected-note{{in instantiation of default function argument expression for 'F<S>' required here}}
54}
55
56template<typename T> struct G {
57  G(T) {}
58};
59
60void s(G<int> flags = 10) { }
61
62// Test default arguments
63template<typename T>
64struct X0 {
65  void f(T = T()); // expected-error{{no matching}}
66};
67
68template<typename U>
69void X0<U>::f(U) { }
70
71void test_x0(X0<int> xi) {
72  xi.f();
73  xi.f(17);
74}
75
76struct NotDefaultConstructible { // expected-note 2 {{candidate constructor (the implicit copy constructor) not viable}}
77#if __cplusplus >= 201103L // C++11 or later
78// expected-note@-2 2 {{candidate constructor (the implicit move constructor) not viable}}
79#endif
80  NotDefaultConstructible(int); // expected-note 2{{candidate}}
81};
82
83void test_x0_not_default_constructible(X0<NotDefaultConstructible> xn) {
84  xn.f(NotDefaultConstructible(17));
85  xn.f(42);
86  xn.f(); // expected-note{{in instantiation of default function argument}}
87}
88
89template<typename T>
90struct X1 {
91  typedef T value_type;
92  X1(const value_type& value = value_type());
93};
94
95void test_X1() {
96  X1<int> x1;
97}
98
99template<typename T>
100struct X2 {
101  void operator()(T = T()); // expected-error{{no matching}}
102};
103
104void test_x2(X2<int> x2i, X2<NotDefaultConstructible> x2n) {
105  x2i();
106  x2i(17);
107  x2n(NotDefaultConstructible(17));
108  x2n(); // expected-note{{in instantiation of default function argument}}
109}
110
111// PR5283
112namespace PR5283 {
113template<typename T> struct A {
114  A(T = 1); // expected-error 3 {{cannot initialize a parameter of type 'int *' with an rvalue of type 'int'}} \
115  // expected-note 3{{passing argument to parameter here}}
116};
117
118struct B : A<int*> {
119  B();
120};
121B::B() { } // expected-note {{in instantiation of default function argument expression for 'A<int *>' required he}}
122
123struct C : virtual A<int*> {
124  C();
125};
126C::C() { } // expected-note {{in instantiation of default function argument expression for 'A<int *>' required he}}
127
128struct D {
129  D();
130
131  A<int*> a;
132};
133D::D() { } // expected-note {{in instantiation of default function argument expression for 'A<int *>' required he}}
134}
135
136// PR5301
137namespace pr5301 {
138  void f(int, int = 0);
139
140  template <typename T>
141  void g(T, T = 0);
142
143  template <int I>
144  void i(int a = I);
145
146  template <typename T>
147  void h(T t) {
148    f(0);
149    g(1);
150    g(t);
151    i<2>();
152  }
153
154  void test() {
155    h(0);
156  }
157}
158
159// PR5810
160namespace PR5810 {
161  template<typename T>
162  struct allocator {
163    allocator() { int a[sizeof(T) ? -1 : -1]; } // expected-error2 {{array with a negative size}}
164  };
165
166  template<typename T>
167  struct vector {
168    vector(const allocator<T>& = allocator<T>()) {} // expected-note2 {{instantiation of}}
169  };
170
171  struct A { };
172  struct B { };
173
174  template<typename>
175  void FilterVTs() {
176    vector<A> Result;
177  }
178
179  void f() {
180    vector<A> Result;
181  }
182
183  template<typename T>
184  struct X {
185    vector<B> bs;
186    X() { }
187  };
188
189  void f2() {
190    X<float> x; // expected-note{{member function}}
191  }
192}
193
194template<typename T> void f4(T, int = 17);
195template<> void f4<int>(int, int);
196
197void f4_test(int i) {
198  f4(i);
199}
200
201// Instantiate for initialization
202namespace InstForInit {
203  template<typename T>
204  struct Ptr {
205    typedef T* type;
206    Ptr(type);
207  };
208
209  template<typename T>
210  struct Holder {
211    Holder(int i, Ptr<T> ptr = 0);
212  };
213
214  void test_holder(int i) {
215    Holder<int> h(i);
216  }
217};
218
219namespace PR5810b {
220  template<typename T>
221  T broken() {
222    T t;
223    double**** not_it = t;
224  }
225
226  void f(int = broken<int>());
227  void g() { f(17); }
228}
229
230namespace PR5810c {
231  template<typename T>
232  struct X {
233    X() {
234      T t;
235      double *****p = t; // expected-error{{cannot initialize a variable of type 'double *****' with an lvalue of type 'int'}}
236    }
237    X(const X&) { }
238  };
239
240  struct Y : X<int> { // expected-note{{instantiation of}}
241  };
242
243  void f(Y y = Y());
244
245  void g() { f(); }
246}
247
248namespace PR8127 {
249  template< typename T > class PointerClass {
250  public:
251    PointerClass( T * object_p ) : p_( object_p ) {
252      p_->acquire();
253    }
254  private:
255    T * p_;
256  };
257
258  class ExternallyImplementedClass;
259
260  class MyClass {
261    void foo( PointerClass<ExternallyImplementedClass> = 0 );
262  };
263}
264
265namespace rdar8427926 {
266  template<typename T>
267  struct Boom {
268    ~Boom() {
269      T t;
270      double *******ptr = t; // expected-error 2{{cannot initialize}}
271    }
272  };
273
274  Boom<float> *bfp;
275
276  struct X {
277    void f(Boom<int> = Boom<int>()) { } // expected-note{{requested here}}
278    void g(int x = (delete bfp, 0)); // expected-note{{requested here}}
279  };
280
281  void test(X *x) {
282    x->f();
283    x->g();
284  }
285}
286
287namespace PR8401 {
288  template<typename T>
289  struct A {
290    A() { T* x = 1; } // expected-error{{cannot initialize a variable of type 'int *' with an rvalue of type 'int'}}
291  };
292
293  template<typename T>
294  struct B {
295    B(const A<T>& a = A<T>()); // expected-note{{in instantiation of}}
296  };
297
298  void f(B<int> b = B<int>());
299
300  void g() {
301    f();
302  }
303}
304
305namespace PR12581 {
306  const int a = 0;
307  template < typename > struct A;
308  template < typename MatrixType, int =
309  A < MatrixType >::Flags ? : A < MatrixType >::Flags & a > class B;
310  void
311  fn1 ()
312  {
313  }
314}
315
316namespace PR13758 {
317  template <typename T> struct move_from {
318    T invalid;
319  };
320  template <class K>
321  struct unordered_map {
322    explicit unordered_map(int n = 42);
323    unordered_map(move_from<K> other);
324  };
325  template<typename T>
326  void StripedHashTable() {
327    new unordered_map<void>();
328    new unordered_map<void>;
329  }
330  void tt() {
331    StripedHashTable<int>();
332  }
333}
334