1 // RUN: %clang_cc1 -fsyntax-only -verify %s
2
3 // Test the use of elaborated-type-specifiers to inject the names of
4 // structs (or classes or unions) into an outer scope as described in
5 // C++ [basic.scope.pdecl]p5.
6 typedef struct S1 {
7 union {
8 struct S2 *x;
9 struct S3 *y;
10 };
11 } S1;
12
test_elab(S1 * s1,struct S2 * s2,struct S3 * s3)13 bool test_elab(S1 *s1, struct S2 *s2, struct S3 *s3) {
14 if (s1->x == s2) return true;
15 if (s1->y == s3) return true;
16 return false;
17 }
18
19 namespace NS {
20 class X {
21 public:
22 void test_elab2(struct S4 *s4); // expected-note{{'NS::S4' declared here}}
23 };
24
test_elab2(S4 * s4)25 void X::test_elab2(S4 *s4) { } // expected-note{{passing argument to parameter 's4' here}}
26 }
27
test_X_elab(NS::X x)28 void test_X_elab(NS::X x) {
29 struct S4 *s4 = 0; // expected-note{{'S4' is not defined, but forward declared here; conversion would be valid if it was derived from 'NS::S4'}}
30 x.test_elab2(s4); // expected-error{{cannot initialize a parameter of type 'NS::S4 *' with an lvalue of type 'struct S4 *'}}
31 }
32
33 namespace NS {
34 S4 *get_S4();
35 }
36
test_S5_scope()37 void test_S5_scope() {
38 S4 *s4; // expected-error{{unknown type name 'S4'; did you mean 'NS::S4'?}}
39 }
40
test_funcparam_scope(struct S5 * s5)41 int test_funcparam_scope(struct S5 * s5) {
42 struct S5 { int y; } *s5_2 = 0;
43 if (s5 == s5_2) return 1; // expected-error {{comparison of distinct pointer types ('struct S5 *' and 'struct S5 *')}}
44 return 0;
45 }
46
47 namespace test5 {
48 struct A {
49 class __attribute__((visibility("hidden"))) B {};
50
testtest5::A51 void test(class __attribute__((visibility("hidden"), noreturn)) B b) { // expected-warning {{'noreturn' attribute only applies to functions and methods}}
52 }
53 };
54 }
55
56 namespace test6 {
57 struct C {
58 template <typename> friend struct A; // expected-note {{'A' declared here}}
59 };
60 struct B {
61 struct A *p; // expected-error {{implicit declaration introduced by elaborated type conflicts with a template of the same name}}
62 };
63 }
64