xref: /llvm-project/clang/test/SemaCXX/member-expr.cpp (revision 0c51de4ab1ae11f105c0c9bf7f7deb603b3a67e2)
1 // RUN: %clang_cc1 -fsyntax-only -verify %s
2 
3 class X{
4 public:
5   enum E {Enumerator}; // expected-note 2{{declared here}}
6   int f();
7   static int mem;
8   static float g();
9 };
10 
11 void test(X* xp, X x) {
12   int i1 = x.f();
13   int i2 = xp->f();
14   x.E; // expected-error{{cannot refer to type member 'E' in 'X' with '.'}}
15   xp->E; // expected-error{{cannot refer to type member 'E' in 'X' with '->'}}
16   int i3 = x.Enumerator;
17   int i4 = xp->Enumerator;
18   x.mem = 1;
19   xp->mem = 2;
20   float f1 = x.g();
21   float f2 = xp->g();
22 }
23 
24 struct A {
25  int f0;
26 };
27 struct B {
28  A *f0();
29 };
30 int f0(B *b) {
31   return b->f0->f0; // expected-error{{did you mean to call it with no arguments}}
32 }
33 
34 int i;
35 
36 namespace C {
37   int i;
38 }
39 
40 void test2(X *xp) {
41   xp->::i = 7; // expected-error{{qualified member access refers to a member in the global namespace}}
42   xp->C::i = 7; // expected-error{{qualified member access refers to a member in namespace 'C'}}
43 }
44 
45 
46 namespace test3 {
47   struct NamespaceDecl;
48 
49   struct NamedDecl {
50     void *getIdentifier() const;
51   };
52 
53   struct NamespaceDecl : NamedDecl {
54     bool isAnonymousNamespace() const {
55       return !getIdentifier();
56     }
57   };
58 }
59 
60 namespace test4 {
61   class X {
62   protected:
63     template<typename T> void f(T);
64   };
65 
66   class Y : public X {
67   public:
68     using X::f;
69   };
70 
71   void test_f(Y y) {
72     y.f(17);
73   }
74 }
75 
76 namespace test5 {
77   struct A {
78     template <class T> void foo();
79   };
80 
81   void test0(int x) {
82   }
83 
84   void test1(A *x) {
85   }
86 
87   void test2(A &x) {
88     x->A::foo<int>(); // expected-error {{'test5::A' is not a pointer; maybe you meant to use '.'?}}
89   }
90 }
91 
92 namespace PR7508 {
93   struct A {
94     struct CleanupScope {};
95     void PopCleanupBlock(); // expected-note{{'PopCleanupBlock' declared here}}
96   };
97 
98   void foo(A &a) {
99     a.PopCleanupScope(); // expected-error{{no member named 'PopCleanupScope' in 'PR7508::A'; did you mean 'PopCleanupBlock'?}}
100   }
101 }
102 
103 namespace rdar8231724 {
104   namespace N {
105     template<typename T> struct X1;
106     int i;
107   }
108 
109   struct X { };
110   struct Y : X { };
111 
112   template<typename T> struct Z { int n; };
113 
114   void f(Y *y) {
115     y->N::X1<int>; // expected-error{{'rdar8231724::N::X1' is not a member of class 'rdar8231724::Y'}}
116     y->Z<int>::n; // expected-error{{'rdar8231724::Z<int>::n' is not a member of class 'rdar8231724::Y'}}
117     y->template Z<int>::n; // expected-error{{'rdar8231724::Z<int>::n' is not a member of class 'rdar8231724::Y'}} \
118     // expected-warning{{'template' keyword outside of a template}}
119   }
120 }
121 
122 namespace PR9025 {
123   struct S { int x; };
124   S fun(); // expected-note{{possible target for call}}
125   int fun(int i); // expected-note{{possible target for call}}
126   int g() {
127     return fun.x; // expected-error{{reference to overloaded function could not be resolved; did you mean to call it with no arguments?}}
128   }
129 
130   S fun2(); // expected-note{{possible target for call}}
131   S fun2(int i); // expected-note{{possible target for call}}
132   int g2() {
133     return fun2.x; // expected-error{{reference to overloaded function could not be resolved; did you mean to call it with no arguments?}}
134   }
135 
136   S fun3(int i=0); // expected-note{{possible target for call}}
137   int fun3(int i, int j); // expected-note{{possible target for call}}
138   int g3() {
139     return fun3.x; // expected-error{{reference to overloaded function could not be resolved; did you mean to call it with no arguments?}}
140   }
141 
142   template <typename T> S fun4(); // expected-note{{possible target for call}}
143   int g4() {
144     return fun4.x; // expected-error{{reference to overloaded function could not be resolved; did you mean to call it?}}
145   }
146 
147   S fun5(int i); // expected-note{{possible target for call}}
148   S fun5(float f); // expected-note{{possible target for call}}
149   int g5() {
150     return fun5.x; // expected-error{{reference to overloaded function could not be resolved; did you mean to call it?}}
151   }
152 }
153 
154 namespace FuncInMemberExpr {
155   struct Vec { int size(); };
156   Vec fun1();
157   int test1() { return fun1.size(); } // expected-error {{base of member reference is a function; perhaps you meant to call it with no arguments}}
158   Vec *fun2();
159   int test2() { return fun2->size(); } // expected-error {{base of member reference is a function; perhaps you meant to call it with no arguments}}
160   Vec fun3(int x = 0);
161   int test3() { return fun3.size(); } // expected-error {{base of member reference is a function; perhaps you meant to call it with no arguments}}
162 }
163 
164 namespace DotForSemiTypo {
165 void f(int i) {
166   // If the programmer typo'd '.' for ';', make sure we point at the '.' rather
167   // than the "field name" (whatever the first token on the next line happens to
168   // be).
169   int j = i. // expected-error {{member reference base type 'int' is not a structure or union}}
170   j = 0;
171 }
172 }
173 
174 namespace PR15045 {
175   class Cl0 {
176   public:
177     int a;
178   };
179 
180   int f() {
181     Cl0 c;
182     return c->a;  // expected-error {{member reference type 'PR15045::Cl0' is not a pointer; maybe you meant to use '.'?}}
183   }
184 
185   struct bar {
186     void func();  // expected-note {{'func' declared here}}
187   };
188 
189   struct foo {
190     bar operator->();  // expected-note 2 {{'->' applied to return value of the operator->() declared here}}
191   };
192 
193   template <class T> void call_func(T t) {
194     t->func();  // expected-error-re 2 {{member reference type 'PR15045::bar' is not a pointer$}} \
195                 // expected-note {{did you mean to use '.' instead?}}
196   }
197 
198   void test_arrow_on_non_pointer_records() {
199     bar e;
200     foo f;
201 
202     // Show that recovery has happened by also triggering typo correction
203     e->Func();  // expected-error {{member reference type 'PR15045::bar' is not a pointer; maybe you meant to use '.'?}} \
204                 // expected-error {{no member named 'Func' in 'PR15045::bar'; did you mean 'func'?}}
205 
206     // Make sure a fixit isn't given in the case that the '->' isn't actually
207     // the problem (the problem is with the return value of an operator->).
208     f->func();  // expected-error-re {{member reference type 'PR15045::bar' is not a pointer$}}
209 
210     call_func(e);  // expected-note {{in instantiation of function template specialization 'PR15045::call_func<PR15045::bar>' requested here}}
211 
212     call_func(f);  // expected-note {{in instantiation of function template specialization 'PR15045::call_func<PR15045::foo>' requested here}}
213   }
214 }
215