1 // RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++11 -Wabstract-vbase-init
2
3 #ifndef __GXX_EXPERIMENTAL_CXX0X__
4 #define __CONCAT(__X, __Y) __CONCAT1(__X, __Y)
5 #define __CONCAT1(__X, __Y) __X ## __Y
6
7 #define static_assert(__b, __m) \
8 typedef int __CONCAT(__sa, __LINE__)[__b ? 1 : -1]
9 #endif
10
11 union IncompleteUnion;
12
13 static_assert(!__is_abstract(IncompleteUnion), "unions are never abstract");
14
15 class C {
16 virtual void f() = 0; // expected-note {{unimplemented pure virtual method 'f'}}
17 };
18
19 static_assert(__is_abstract(C), "C has a pure virtual function");
20
21 class D : C {
22 };
23
24 static_assert(__is_abstract(D), "D inherits from an abstract class");
25
26 class E : D {
27 virtual void f();
28 };
29
30 static_assert(!__is_abstract(E), "E inherits from an abstract class but implements f");
31
32 C *d = new C; // expected-error {{allocating an object of abstract class type 'C'}}
33
34 C c; // expected-error {{variable type 'C' is an abstract class}}
35 void t1(C c);
36 void t2(C);
t3(C c)37 void t3(C c){} // expected-error {{parameter type 'C' is an abstract class}}
t4(C)38 void t4(C){} // expected-error {{parameter type 'C' is an abstract class}}
39
40 struct S {
41 C c; // expected-error {{field type 'C' is an abstract class}}
42 };
43
44 void t5(const C&);
45
f()46 void f() {
47 C(); // expected-error {{allocating an object of abstract class type 'C'}}
48 t5(C()); // expected-error {{allocating an object of abstract class type 'C'}}
49 }
50
51 C e1[2]; // expected-error {{array of abstract class type 'C'}}
52 C (*e2)[2]; // expected-error {{array of abstract class type 'C'}}
53 C (**e3)[2]; // expected-error {{array of abstract class type 'C'}}
54
55 void t6(C c[2]); // expected-error {{array of abstract class type 'C'}}
56
57 void t7(void (*)(C));
58
59 typedef void (*Func)(C);
60 void t8(Func);
61
62 class F {
a()63 F a() { while (1) {} } // expected-error {{return type 'F' is an abstract class}}
64
65 class D {
f(F c)66 void f(F c){} // expected-error {{parameter type 'F' is an abstract class}}
67 void g(F c);
68 void h(F c) = delete;
69 };
70
71 union U {
u(F c)72 void u(F c){} // expected-error {{parameter type 'F' is an abstract class}}
73 void v(F c);
74 void w(F c) = delete;
75 };
76
77 virtual void f() = 0; // expected-note {{unimplemented pure virtual method 'f'}}
78 };
79
80 // Diagnosing in these cases is prohibitively expensive. We still
81 // diagnose at the function definition, of course.
82
83 class Abstract;
84
85 void t8(Abstract a);
86
t9()87 void t9() {
88 void h(Abstract a);
89 }
90
91 namespace N {
92 void h(Abstract a);
93 }
94
95 class Abstract {
96 virtual void f() = 0;
97 };
98
99 class foo {
100 public:
101 virtual foo *getFoo() = 0;
102 };
103
104 class bar : public foo {
105 public:
106 virtual bar *getFoo();
107 };
108
109 bar x;
110
111 class A {
112 public:
113 virtual void release() = 0;
114 virtual void release(int count) = 0;
115 virtual void retain() = 0;
116 };
117
118 class B : public A {
119 public:
120 virtual void release();
121 virtual void release(int count);
122 virtual void retain();
123 };
124
foo(void)125 void foo(void) {
126 B b;
127 }
128
129 struct K {
130 int f;
131 virtual ~K();
132 };
133
134 struct L : public K {
135 void f();
136 };
137
138 // PR5222
139 namespace PR5222 {
140 struct A {
141 virtual A *clone() = 0;
142 };
143 struct B : public A {
144 virtual B *clone() = 0;
145 };
146 struct C : public B {
147 virtual C *clone();
148 };
149
150 C c;
151 }
152
153 // PR5550 - instantiating template didn't track overridden methods
154 namespace PR5550 {
155 struct A {
156 virtual void a() = 0;
157 virtual void b() = 0;
158 };
159 template<typename T> struct B : public A {
160 virtual void b();
161 virtual void c() = 0;
162 };
163 struct C : public B<int> {
164 virtual void a();
165 virtual void c();
166 };
167 C x;
168 }
169
170 namespace PureImplicit {
171 // A pure virtual destructor should be implicitly overridden.
172 struct A { virtual ~A() = 0; };
173 struct B : A {};
174 B x;
175
176 // A pure virtual assignment operator should be implicitly overridden.
177 struct D;
178 struct C { virtual D& operator=(const D&) = 0; };
179 struct D : C {};
180 D y;
181 }
182
183 namespace test1 {
184 struct A {
185 virtual void foo() = 0;
186 };
187
188 struct B : A {
189 using A::foo;
190 };
191
192 struct C : B {
193 void foo();
194 };
195
test()196 void test() {
197 C c;
198 }
199 }
200
201 namespace test2 {
202 struct X1 {
203 virtual void xfunc(void) = 0; // expected-note {{unimplemented pure virtual method}}
gtest2::X1204 void g(X1 parm7){} // expected-error {{parameter type 'X1' is an abstract class}}
gtest2::X1205 void g(X1 parm8[2]){} // expected-error {{parameter type 'X1' is an abstract class}}
206 };
207
208 template <int N>
209 struct X2 {
210 virtual void xfunc(void) = 0; // expected-note {{unimplemented pure virtual method}}
gtest2::X2211 void g(X2 parm10){} // expected-error {{parameter type 'X2<N>' is an abstract class}}
gtest2::X2212 void g(X2 parm11[2]) {} // expected-error {{parameter type 'X2<N>' is an abstract class}}
213 };
214 }
215
216 namespace test3 {
217 struct A { // expected-note {{not complete until}}
218 A x; // expected-error {{field has incomplete type}}
219 virtual void abstract() = 0;
220 };
221
222 struct B { // expected-note {{not complete until}}
223 virtual void abstract() = 0;
224 B x; // expected-error {{field has incomplete type}}
225 };
226
227 struct C {
228 static C x; // expected-error {{abstract class}}
229 virtual void abstract() = 0; // expected-note {{unimplemented pure virtual method}}
230 };
231
232 struct D {
233 virtual void abstract() = 0; // expected-note {{unimplemented pure virtual method}}
234 static D x; // expected-error {{abstract class}}
235 };
236 }
237
238 namespace test4 {
239 template <class T> struct A {
240 A x; // expected-error {{abstract class}}
241 virtual void abstract() = 0; // expected-note {{unimplemented pure virtual method}}
242 };
243
244 template <class T> struct B {
245 virtual void abstract() = 0; // expected-note {{unimplemented pure virtual method}}
246 B x; // expected-error {{abstract class}}
247 };
248
249 template <class T> struct C {
250 static C x; // expected-error {{abstract class}}
251 virtual void abstract() = 0; // expected-note {{unimplemented pure virtual method}}
252 };
253
254 template <class T> struct D {
255 virtual void abstract() = 0; // expected-note {{unimplemented pure virtual method}}
256 static D x; // expected-error {{abstract class}}
257 };
258 }
259
260 namespace test5 {
261 struct A { A(int); virtual ~A() = 0; }; // expected-note {{pure virtual method}}
262 const A &a = 0; // expected-error {{abstract class}}
263 void f(const A &a = 0); // expected-error {{abstract class}}
264 void g(const A &a);
h()265 void h() { g(0); } // expected-error {{abstract class}}
266 }
267
268 // PR9247: Crash on invalid in clang::Sema::ActOnFinishCXXMemberSpecification
269 namespace pr9247 {
270 struct A {
271 virtual void g(const A& input) = 0;
272 struct B {
273 C* f(int foo);
274 };
275 };
276 }
277
278 namespace pr12658 {
279 class C {
280 public:
C(int v)281 C(int v){}
282 virtual void f() = 0; // expected-note {{unimplemented pure virtual method 'f' in 'C'}}
283 };
284
foo(const C & c)285 void foo(const C& c ) {}
286
bar(void)287 void bar( void ) {
288 foo(C(99)); // expected-error {{allocating an object of abstract class type 'C'}}
289 }
290 }
291
292 namespace pr16659 {
293 struct A {
294 A(int);
295 virtual void x() = 0; // expected-note {{unimplemented pure virtual method 'x' in 'RedundantInit'}}
296 };
297 struct B : virtual A {};
298 struct C : B {
Cpr16659::C299 C() : A(37) {}
xpr16659::C300 void x() override {}
301 };
302
303 struct X {
304 friend class Z;
305 private:
306 X &operator=(const X&);
307 };
308 struct Y : virtual X { // expected-note {{class 'X' has an inaccessible copy assignment}}
309 virtual ~Y() = 0;
310 };
311 struct Z : Y {}; // expected-note {{class 'Y' has a deleted copy assignment}}
f(Z & a,const Z & b)312 void f(Z &a, const Z &b) { a = b; } // expected-error {{copy assignment operator is implicitly deleted}}
313
314 struct RedundantInit : virtual A {
RedundantInitpr16659::RedundantInit315 RedundantInit() : A(0) {} // expected-warning {{initializer for virtual base class 'A' of abstract class 'RedundantInit' will never be used}}
316 };
317 }
318
319 struct inline_var { // expected-note {{until the closing '}'}}
320 static inline inline_var v = 0; // expected-error {{incomplete type}} expected-warning {{extension}}
321 virtual void f() = 0;
322 };
323
324 struct var_template {
325 template<typename T>
326 static var_template v; // expected-error {{abstract class}} expected-warning {{extension}}
327 virtual void f() = 0; // expected-note {{unimplemented}}
328 };
329
330 struct var_template_def { // expected-note {{until the closing '}'}}
331 template<typename T>
332 static inline var_template_def v = {}; // expected-error {{incomplete type}} expected-warning 2{{extension}}
333 virtual void f() = 0;
334 };
335
336 struct friend_fn {
337 friend void g(friend_fn);
338 virtual void f() = 0;
339 };
340
341 struct friend_fn_def {
g(friend_fn_def)342 friend void g(friend_fn_def) {} // expected-error {{abstract class}}
343 virtual void f() = 0; // expected-note {{unimplemented}}
344 };
345
346 struct friend_template {
347 template<typename T>
348 friend void g(friend_template);
349 virtual void f() = 0;
350 };
351
352 struct friend_template_def {
353 template<typename T>
g(friend_template_def)354 friend void g(friend_template_def) {} // expected-error {{abstract class}}
355 virtual void f() = 0; // expected-note {{unimplemented}}
356 };
357
358 namespace GH63012 {
359 struct foo {
360 virtual ~foo() = 0;
361 };
362 void f(foo) = delete;
363 foo i() = delete;
364 void h(foo);
365 foo g();
366
367 struct S {
368 virtual void func() = 0; // expected-note {{unimplemented pure virtual method 'func' in 'S'}}
369 };
func()370 void S::func() {}
371
372 static_assert(__is_abstract(S), "");
373
374 struct T {
375 void func(S) = delete;
376 void other(S);
yet_anotherGH63012::T377 void yet_another(S) {} // expected-error{{parameter type 'S' is an abstract class}}
378 };
379
380 }
381