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#define CONCAT(a, b) a##b
#define CONCAT2(a, b) CONCAT(a, b)
#define STATIC_ASSERT(condition) \
int CONCAT2(some_array, __LINE__)[(condition) ? 1 : -1]
struct S1
{
struct sub
{
int other : 1;
} whatnot;
int my_bit : 1;
const my_bit2 : 2; // no type!
};
STATIC_ASSERT(sizeof(struct S1)==sizeof(int)*2);
struct S2
{
char my_bit : 1;
};
STATIC_ASSERT(sizeof(struct S2)==sizeof(char));
struct S3
{
char my_bit : 1;
int : 0; // zero width, causes padding to alignment of int
char other;
int whatnot;
};
STATIC_ASSERT(sizeof(struct S3)==sizeof(int)+sizeof(int)+sizeof(int));
int main()
{
// check some operators
struct S1 s1;
s1.my_bit+=1;
s1.my_bit|=1;
s1.my_bit&=1;
s1.my_bit^=1;
s1.my_bit<<=1;
s1.my_bit++;
++s1.my_bit;
(unsigned)s1.my_bit;
int *p;
p=p+s1.my_bit;
p=p-s1.my_bit;
p+=s1.my_bit;
p-=s1.my_bit;
}
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