1 // RUN: %clang_cc1 -fsyntax-only -verify %s
2 struct X {
3 union {
4 float f3;
5 double d2;
6 } named;
7
8 union {
9 int i;
10 float f;
11
12 union {
13 float f2;
14 double d;
15 };
16 };
17
18 struct {
19 int a;
20 float b;
21 };
22 };
23
test_unqual_references(struct X x,const struct X xc)24 void test_unqual_references(struct X x, const struct X xc) {
25 x.i = 0;
26 x.f = 0.0;
27 x.f2 = x.f;
28 x.d = x.f;
29 x.f3 = 0; // expected-error{{no member named 'f3'}}
30 x.a = 0;
31
32 xc.d = 0.0; // expected-error{{read-only variable is not assignable}}
33 xc.f = 0; // expected-error{{read-only variable is not assignable}}
34 xc.a = 0; // expected-error{{read-only variable is not assignable}}
35 }
36
37
38 struct Redecl {
39 int x; // expected-note{{previous declaration is here}}
40 struct y { };
41
42 union {
43 int x; // expected-error{{member of anonymous union redeclares 'x'}}
44 float y;
45 double z; // expected-note{{previous declaration is here}}
46 double zz; // expected-note{{previous declaration is here}}
47 };
48
49 int z; // expected-error{{duplicate member 'z'}}
50 void zz(); // expected-error{{duplicate member 'zz'}}
51 };
52
53 union { // expected-warning{{declaration does not declare anything}}
54 int int_val;
55 float float_val;
56 };
57
58 static union { // expected-warning{{declaration does not declare anything}}
59 int int_val2;
60 float float_val2;
61 };
62
f()63 void f() {
64 int_val2 = 0; // expected-error{{use of undeclared identifier}}
65 float_val2 = 0.0; // expected-error{{use of undeclared identifier}}
66 }
67
g()68 void g() {
69 union { // expected-warning{{declaration does not declare anything}}
70 int i;
71 float f2;
72 };
73 i = 0; // expected-error{{use of undeclared identifier}}
74 f2 = 0.0; // expected-error{{use of undeclared identifier}}
75 }
76
77 // <rdar://problem/6483159>
78 struct s0 { union { int f0; }; };
79
80 // <rdar://problem/6481130>
81 typedef struct { }; // expected-warning{{typedef requires a name}}
82
83 // PR3675
84 struct s1 {
85 int f0; // expected-note{{previous declaration is here}}
86 union {
87 int f0; // expected-error{{member of anonymous union redeclares 'f0'}}
88 };
89 };
90
91 // PR3680
92 struct {}; // expected-warning{{declaration does not declare anything}}
93
94 struct s2 {
95 union {
96 int a;
97 } // expected-warning{{expected ';' at end of declaration list}}
98 }; // expected-error{{expected member name or ';' after declaration specifiers}}
99
100 // Make sure we don't a.k.a. anonymous structs.
101 typedef struct {
102 int x;
103 } a_struct;
104 int tmp = (a_struct) { .x = 0 }; // expected-error {{initializing 'int' with an expression of incompatible type 'a_struct'}}
105
106 // This example comes out of the C11 standard; make sure we don't accidentally reject it.
107 struct s {
108 struct { int i; };
109 int a[];
110 };
111