1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
#include <assert.h>
typedef int INT;
typedef enum _INTEL_CACHE_TYPE {
IntelCacheNull,
IntelCacheTrace=10
} INTEL_CACHE_TYPE;
struct bft {
unsigned int a:3;
unsigned int b:1;
signed int c:2;
_Bool d:3;
// an anonymous bitfield
signed int :2;
// with typedef
INT x:1;
// made of sizeof
unsigned int abc: sizeof(int);
// enums are integers!
INTEL_CACHE_TYPE Type : 5;
// and good as field sizes
INTEL_CACHE_TYPE Field2 : IntelCacheTrace;
};
int main() {
struct bft bf;
assert(bf.a<=7);
assert(bf.b<=1);
assert(bf.c<=1);
bf.a&=0;
assert(bf.a==0);
bf.a+=9;
assert(bf.a==1);
bf.a<<=1;
assert(bf.a==2);
bf.a>>=1;
assert(bf.a==1);
bf.d=2;
assert(bf.d==1);
// assignments have the underlying type
assert(sizeof(bf.d=1)==sizeof(_Bool));
assert(sizeof(bf.a+=1)==sizeof(unsigned));
bf.Type=IntelCacheTrace;
}
|
