xref: /llvm-project/clang/test/SemaCXX/nested-name-spec.cpp (revision e2358c1debe988a9ff262cb267c791c93ee04a4a)
1 // RUN: %clang_cc1 -fsyntax-only -std=c++98 -verify -fblocks %s
2 namespace A {
3   struct C {
4     static int cx;
5 
6     static int cx2;
7 
8     static int Ag1();
9     static int Ag2();
10   };
11   int ax;
12   void Af();
13 }
14 
15 A:: ; // expected-error {{expected unqualified-id}}
16 // FIXME: there is a member 'ax'; it's just not a class.
17 ::A::ax::undef ex3; // expected-error {{no member named 'ax'}}
18 A::undef1::undef2 ex4; // expected-error {{no member named 'undef1'}}
19 
20 int A::C::Ag1() { return 0; }
21 
22 static int A::C::Ag2() { return 0; } // expected-error{{'static' can}}
23 
24 int A::C::cx = 17;
25 
26 
27 static int A::C::cx2 = 17; // expected-error{{'static' can}}
28 
29 class C2 {
30   void m(); // expected-note{{member declaration does not match because it is not const qualified}}
31 
32   void f(const int& parm); // expected-note{{type of 1st parameter of member declaration does not match definition ('const int &' vs 'int')}}
33   void f(int) const; // expected-note{{member declaration does not match because it is const qualified}}
34   void f(float);
35 
36   int x;
37 };
38 
39 void C2::m() const { } // expected-error{{out-of-line definition of 'm' does not match any declaration in 'C2'}}
40 
41 void C2::f(int) { } // expected-error{{out-of-line definition of 'f' does not match any declaration in 'C2'}}
42 
43 void C2::m() {
44   x = 0;
45 }
46 
47 namespace B {
48   void ::A::Af() {} // expected-error {{cannot define or redeclare 'Af' here because namespace 'B' does not enclose namespace 'A'}}
49 }
50 
51 void f1() {
52   void A::Af(); // expected-error {{definition or redeclaration of 'Af' not allowed inside a function}}
53   void (^x)() = ^{ void A::Af(); }; // expected-error {{definition or redeclaration of 'Af' not allowed inside a block}}
54 }
55 
56 void f2() {
57   A:: ; // expected-error {{expected unqualified-id}}
58   A::C::undef = 0; // expected-error {{no member named 'undef'}}
59   ::A::C::cx = 0;
60   int x = ::A::ax = A::C::cx;
61   x = sizeof(A::C);
62   x = sizeof(::A::C::cx);
63 }
64 
65 A::C c1;
66 struct A::C c2;
67 struct S : public A::C {};
68 struct A::undef; // expected-error {{no struct named 'undef' in namespace 'A'}}
69 
70 namespace A2 {
71   typedef int INT;
72   struct RC;
73   struct CC {
74     struct NC;
75   };
76 }
77 
78 struct A2::RC {
79   INT x;
80 };
81 
82 struct A2::CC::NC {
83   void m() {}
84 };
85 
86 void f3() {
87   N::x = 0; // expected-error {{use of undeclared identifier 'N'}}
88   int N;
89   N::x = 0; // expected-error {{expected a class or namespace}}
90   { int A;           A::ax = 0; }
91   { typedef int A;   A::ax = 0; } // expected-error{{expected a class or namespace}}
92   { typedef A::C A;  A::ax = 0; } // expected-error {{no member named 'ax'}}
93   { typedef A::C A;  A::cx = 0; }
94 }
95 
96 // make sure the following doesn't hit any asserts
97 void f4(undef::C); // expected-error {{use of undeclared identifier 'undef'}}
98 
99 typedef void C2::f5(int); // expected-error{{typedef declarator cannot be qualified}}
100 
101 void f6(int A2::RC::x); // expected-error{{parameter declarator cannot be qualified}}
102 
103 int A2::RC::x; // expected-error{{non-static data member defined out-of-line}}
104 
105 void A2::CC::NC::m(); // expected-error{{out-of-line declaration of a member must be a definition}}
106 
107 
108 namespace E {
109   int X = 5;
110 
111   namespace Nested {
112     enum E {
113       X = 0
114     };
115 
116     void f() {
117       return E::X; // expected-error{{expected a class or namespace}}
118     }
119   }
120 }
121 
122 
123 class Operators {
124   Operators operator+(const Operators&) const; // expected-note{{member declaration does not match because it is const qualified}}
125   operator bool();
126 };
127 
128 Operators Operators::operator+(const Operators&) { // expected-error{{out-of-line definition of 'operator+' does not match any declaration in 'Operators'}}
129   Operators ops;
130   return ops;
131 }
132 
133 Operators Operators::operator+(const Operators&) const {
134   Operators ops;
135   return ops;
136 }
137 
138 Operators::operator bool() {
139   return true;
140 }
141 
142 namespace A {
143   void g(int&); // expected-note{{type of 1st parameter of member declaration does not match definition ('int &' vs 'const int &')}}
144 }
145 
146 void A::f() {} // expected-error-re{{out-of-line definition of 'f' does not match any declaration in namespace 'A'$}}
147 
148 void A::g(const int&) { } // expected-error{{out-of-line definition of 'g' does not match any declaration in namespace 'A'}}
149 
150 struct Struct { };
151 
152 void Struct::f() { } // expected-error{{out-of-line definition of 'f' does not match any declaration in 'Struct'}}
153 
154 void global_func(int);
155 void global_func2(int);
156 
157 namespace N {
158   void ::global_func(int) { } // expected-error{{definition or redeclaration of 'global_func' cannot name the global scope}}
159 
160   void f();
161   // FIXME: if we move this to a separate definition of N, things break!
162 }
163 void ::global_func2(int) { } // expected-error{{extra qualification on member 'global_func2'}}
164 
165 void N::f() { } // okay
166 
167 struct Y;  // expected-note{{forward declaration of 'Y'}}
168 Y::foo y; // expected-error{{incomplete type 'Y' named in nested name specifier}}
169 
170 X::X() : a(5) { } // expected-error{{use of undeclared identifier 'X'}} \
171       // expected-error{{C++ requires a type specifier for all declarations}} \
172       // expected-error{{only constructors take base initializers}}
173 
174 struct foo_S {
175   static bool value;
176 };
177 bool (foo_S::value);
178 
179 
180 namespace somens {
181   struct a { }; // expected-note{{candidate constructor (the implicit copy constructor)}}
182 }
183 
184 template <typename T>
185 class foo {
186 };
187 
188 
189 // PR4452 / PR4451
190 foo<somens:a> a2;  // expected-error {{unexpected ':' in nested name specifier}}
191 
192 somens::a a3 = a2; // expected-error {{no viable conversion}}
193 
194 // typedefs and using declarations.
195 namespace test1 {
196   namespace ns {
197     class Counter { public: static int count; };
198     typedef Counter counter;
199   }
200   using ns::counter;
201 
202   class Test {
203     void test1() {
204       counter c;
205       c.count++;
206       counter::count++;
207     }
208   };
209 }
210 
211 // We still need to do lookup in the lexical scope, even if we push a
212 // non-lexical scope.
213 namespace test2 {
214   namespace ns {
215     extern int *count_ptr;
216   }
217   namespace {
218     int count = 0;
219   }
220 
221   int *ns::count_ptr = &count;
222 }
223 
224 // PR6259, invalid case
225 namespace test3 {
226   class A; // expected-note {{forward declaration}}
227   void foo(const char *path) {
228     A::execute(path); // expected-error {{incomplete type 'test3::A' named in nested name specifier}}
229   }
230 }
231 
232 namespace PR7133 {
233   namespace A {
234     class Foo;
235   }
236 
237   namespace A {
238     namespace B {
239       bool foo(Foo &);
240     }
241   }
242 
243   bool A::B::foo(Foo &) {
244     return false;
245   }
246 }
247 
248 class CLASS {
249   void CLASS::foo2(); // expected-error {{extra qualification on member 'foo2'}}
250 };
251 
252 namespace PR8159 {
253   class B { };
254 
255   class A {
256     int A::a; // expected-error{{extra qualification on member 'a'}}
257     static int A::b; // expected-error{{extra qualification on member 'b'}}
258     int ::c; // expected-error{{non-friend class member 'c' cannot have a qualified name}}
259   };
260 }
261 
262 namespace rdar7980179 {
263   class A { void f0(); }; // expected-note {{previous}}
264   int A::f0() {} // expected-error {{out-of-line definition of 'rdar7980179::A::f0' differs from the declaration in the return type}}
265 }
266 
267 namespace alias = A;
268 double *dp = (alias::C*)0; // expected-error{{cannot initialize a variable of type 'double *' with an rvalue of type 'alias::C *'}}
269 
270 // http://llvm.org/PR10109
271 namespace PR10109 {
272 template<typename T>
273 struct A {
274 protected:
275   struct B;
276   struct B::C; // expected-error {{requires a template parameter list}} \
277                // expected-error {{no struct named 'C'}} \
278     // expected-error{{non-friend class member 'C' cannot have a qualified name}}
279 };
280 
281 template<typename T>
282 struct A2 {
283 protected:
284   struct B;
285 };
286 template <typename T>
287 struct A2<T>::B::C; // expected-error {{no struct named 'C'}}
288 }
289 
290 namespace PR13033 {
291 namespace NS {
292  int a; // expected-note {{'NS::a' declared here}}
293  int longer_b; //expected-note {{'NS::longer_b' declared here}}
294 }
295 
296 // Suggest adding a namespace qualifier to both variable names even though one
297 // is only a single character long.
298 int foobar = a + longer_b; // expected-error {{use of undeclared identifier 'a'; did you mean 'NS::a'?}} \
299                            // expected-error {{use of undeclared identifier 'longer_b'; did you mean 'NS::longer_b'?}}
300 }
301 
302 // <rdar://problem/13853540>
303 namespace N {
304   struct X { };
305   namespace N {
306     struct Foo {
307       struct N::X *foo(); // expected-error{{no struct named 'X' in namespace 'N::N'}}
308     };
309   }
310 }
311 
312 namespace TypedefNamespace { typedef int F; };
313 TypedefNamespace::F::NonexistentName BadNNSWithCXXScopeSpec; // expected-error {{expected a class or namespace}}
314