1 // RUN: %clang_cc1 -fsyntax-only -pedantic -Wno-strict-prototypes -verify %s
2
3 /* This test checks the introduction of struct and union types based
4 on a type specifier of the form "struct-or-union identifier" when they
5 type has not yet been declared. See C99 6.7.2.3p8. */
6
7 typedef struct S1 {
8 union {
9 struct S2 *x;
10 struct S3 *y;
11 } u1;
12 } S1;
13
test_struct_scope(S1 * s1,struct S2 * s2,struct S3 * s3)14 int test_struct_scope(S1 *s1, struct S2 *s2, struct S3 *s3) {
15 if (s1->u1.x == s2) return 1;
16 if (s1->u1.y == s3) return 1;
17 return 0;
18 }
19
test_struct_scope_2(S1 * s1)20 int test_struct_scope_2(S1 *s1) {
21 struct S2 { int x; } *s2 = 0;
22 if (s1->u1.x == s2) return 1; /* expected-warning {{comparison of distinct pointer types ('struct S2 *' and 'struct S2 *')}} */
23 return 0;
24 }
25
26 // FIXME: We do not properly implement C99 6.2.1p4, which says that
27 // the type "struct S4" declared in the function parameter list has
28 // block scope within the function definition. The problem, in this
29 // case, is that the code is ill-formed but we warn about the two S4's
30 // being incompatible (we think they are two different types).
test_struct_scope_3(struct S4 * s4)31 int test_struct_scope_3(struct S4 * s4) { // expected-warning{{declaration of 'struct S4' will not be visible outside of this function}}
32 struct S4 { int y; } *s4_2 = 0;
33 /* if (s4 == s4_2) return 1; */
34 return 0;
35 }
36
37 void f(struct S5 { int y; } s5); // expected-warning{{declaration of 'struct S5' will not be visible outside of this function}}
38
39 // PR clang/3312
40 struct S6 {
41 enum { BAR } e;
42 };
43
test_S6(void)44 void test_S6(void) {
45 struct S6 a;
46 a.e = BAR;
47 }
48
49 typedef struct z_foo_s {
50 struct bar_baz *baz;
51 } z_foo;
52 typedef z_foo *z_foop;
53 struct bar_baz {
54 enum {
55 SQUAT, FLAG, DICT4, DICT3, DICT2, DICT1, DICT0, HOP, CHECK4, CHECK3, CHECK2, CHECK1, DONE, BAD
56 } mode;
57 int nowrap;
58 };
59 void
wizbiz_quxPoof(z)60 wizbiz_quxPoof(z)
61 z_foop z;
62 {
63 z->baz->mode = z->baz->nowrap ? HOP : SQUAT;
64 }
65