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   // rdar://6081627
9   int b : 33; // expected-error{{width of bit-field 'b' (33 bits) exceeds width of its type (32 bits)}}
10 
11   int c : (1 + 0.25); // expected-error{{expression is not an integer constant expression}}
12   int d : (int)(1 + 0.25);
13 
14   // rdar://6138816
15   int e : 0;  // expected-error {{bit-field 'e' has zero width}}
16 
17   float xx : 4;  // expected-error {{bit-field 'xx' has non-integral type}}
18 
19   // PR3607
20   enum e0 f : 1; // expected-error {{field has incomplete type 'enum e0'}}
21 
22   int g : (_Bool)1;
23 
24   // PR4017
25   char : 10;      // expected-error {{width of anonymous bit-field (10 bits) exceeds width of its type (8 bits)}}
26   unsigned : -2;  // expected-error {{anonymous bit-field has negative width (-2)}}
27   float : 12;     // expected-error {{anonymous bit-field has non-integral type 'float'}}
28 
29   _Bool : 2;   // expected-error {{width of anonymous bit-field (2 bits) exceeds width of its type (1 bit)}}
30   _Bool h : 5; // expected-error {{width of bit-field 'h' (5 bits) exceeds width of its type (1 bit)}}
31 };
32 
33 struct b {unsigned x : 2;} x;
34 __typeof__(x.x+1) y;
35 int y;
36 
37 struct {unsigned x : 2;} x2;
38 __typeof__((x.x+=1)+1) y;
39 __typeof__((0,x.x)+1) y;
40 __typeof__(x.x<<1) y;
41 int y;
42 
43 struct PR8025 {
44   double : 2; // expected-error{{anonymous bit-field has non-integral type 'double'}}
45 };
46 
47 struct Test4 {
48   unsigned bitX : 4;
49   unsigned bitY : 4;
50   unsigned var;
51 };
test4(struct Test4 * t)52 void test4(struct Test4 *t) {
53   (void) sizeof(t->bitX); // expected-error {{invalid application of 'sizeof' to bit-field}}
54   (void) sizeof((t->bitY)); // expected-error {{invalid application of 'sizeof' to bit-field}}
55   (void) sizeof(t->bitX = 4); // not a bitfield designator in C
56   (void) sizeof(t->bitX += 4); // not a bitfield designator in C
57   (void) sizeof((void) 0, t->bitX); // not a bitfield designator in C
58   (void) sizeof(t->var ? t->bitX : t->bitY); // not a bitfield designator in C
59   (void) sizeof(t->var ? t->bitX : t->bitX); // not a bitfield designator in C
60 }
61 
62 typedef unsigned Unsigned;
63 typedef signed Signed;
64 
65 struct Test5 { unsigned n : 2; } t5;
66 // Bitfield is unsigned
67 struct Test5 sometest5 = {-1};
68 typedef __typeof__(+t5.n) Signed;  // ... but promotes to signed.
69 
70 typedef __typeof__(t5.n + 0) Signed; // Arithmetic promotes.
71 
72 typedef __typeof__(+(t5.n = 0)) Signed;  // FIXME: Assignment should not; the result
73 typedef __typeof__(+(t5.n += 0)) Signed; // is a non-bit-field lvalue of type unsigned.
74 typedef __typeof__(+(t5.n *= 0)) Signed;
75 
76 typedef __typeof__(+(++t5.n)) Signed; // FIXME: Increment is equivalent to compound-assignment.
77 typedef __typeof__(+(--t5.n)) Signed; // This should not promote to signed.
78 
79 typedef __typeof__(+(t5.n++)) Unsigned; // Post-increment is underspecified, but seems to
80 typedef __typeof__(+(t5.n--)) Unsigned; // also act like compound-assignment.
81 
82 struct Test6 {
83   : 0.0; // expected-error{{type name requires a specifier or qualifier}}
84 };
85 
86 struct PR36157 {
87   int n : 1 ? 1 : implicitly_declare_function(); // expected-warning {{invalid in C99}}
88 };
89