1 // RUN: %clang_cc1 %s -fsyntax-only -verify -std=c11 -Wno-unused-value
2
3 enum e0; // expected-note{{forward declaration of 'enum e0'}}
4
5 struct a {
6 int a : -1; // expected-error{{bit-field 'a' has negative width}}
7
8 int b : 33; // expected-error{{width of bit-field 'b' (33 bits) exceeds the width of its type (32 bits)}}
9
10 int c : (1 + 0.25); // expected-error{{integer constant expression must have integer type}}
11 int d : (int)(1 + 0.25);
12
13 int e : 0; // expected-error {{bit-field 'e' has zero width}}
14
15 float xx : 4; // expected-error {{bit-field 'xx' has non-integral type}}
16
17 // PR3607
18 enum e0 f : 1; // expected-error {{field has incomplete type 'enum e0'}}
19
20 int g : (_Bool)1;
21
22 // PR4017
23 char : 10; // expected-error {{width of anonymous bit-field (10 bits) exceeds the width of its type (8 bits)}}
24 unsigned : -2; // expected-error {{anonymous bit-field has negative width (-2)}}
25 float : 12; // expected-error {{anonymous bit-field has non-integral type 'float'}}
26
27 _Bool : 2; // expected-error {{width of anonymous bit-field (2 bits) exceeds the width of its type (1 bit)}}
28 _Bool h : 5; // expected-error {{width of bit-field 'h' (5 bits) exceeds the width of its type (1 bit)}}
29 };
30
31 struct b {unsigned x : 2;} x;
32 __typeof__(x.x+1) y;
33 int y;
34
35 struct {unsigned x : 2;} x2;
36 __typeof__((x.x+=1)+1) y;
37 __typeof__((0,x.x)+1) y;
38 __typeof__(x.x<<1) y;
39 int y;
40
41 struct PR8025 {
42 double : 2; // expected-error{{anonymous bit-field has non-integral type 'double'}}
43 };
44
45 struct Test4 {
46 unsigned bitX : 4;
47 unsigned bitY : 4;
48 unsigned var;
49 };
test4(struct Test4 * t)50 void test4(struct Test4 *t) {
51 (void) sizeof(t->bitX); // expected-error {{invalid application of 'sizeof' to bit-field}}
52 (void) sizeof((t->bitY)); // expected-error {{invalid application of 'sizeof' to bit-field}}
53 (void) sizeof(t->bitX = 4); // not a bitfield designator in C
54 (void) sizeof(t->bitX += 4); // not a bitfield designator in C
55 (void) sizeof((void) 0, t->bitX); // not a bitfield designator in C
56 (void) sizeof(t->var ? t->bitX : t->bitY); // not a bitfield designator in C
57 (void) sizeof(t->var ? t->bitX : t->bitX); // not a bitfield designator in C
58 }
59
60 typedef unsigned Unsigned;
61 typedef signed Signed;
62
63 struct Test5 { unsigned n : 2; } t5;
64 // Bitfield is unsigned
65 struct Test5 sometest5 = {-1};
66 typedef __typeof__(+t5.n) Signed; // ... but promotes to signed.
67
68 typedef __typeof__(t5.n + 0) Signed; // Arithmetic promotes.
69
70 typedef __typeof__(+(t5.n = 0)) Signed; // FIXME: Assignment should not; the result
71 typedef __typeof__(+(t5.n += 0)) Signed; // is a non-bit-field lvalue of type unsigned.
72 typedef __typeof__(+(t5.n *= 0)) Signed;
73
74 typedef __typeof__(+(++t5.n)) Signed; // FIXME: Increment is equivalent to compound-assignment.
75 typedef __typeof__(+(--t5.n)) Signed; // This should not promote to signed.
76
77 typedef __typeof__(+(t5.n++)) Unsigned; // Post-increment is underspecified, but seems to
78 typedef __typeof__(+(t5.n--)) Unsigned; // also act like compound-assignment.
79
80 struct Test6 {
81 : 0.0; // expected-error{{type name requires a specifier or qualifier}}
82 };
83
84 struct PR36157 {
85 int n : 1 ? 1 : implicitly_declare_function(); // expected-error {{call to undeclared function 'implicitly_declare_function'; ISO C99 and later do not support implicit function declarations}}
86 };
87