C6317
warning C6317: incorrect operator: logical-not (!) is not interchangeable with ones-complement (~)
This warning indicates that a logical-not (!) is being applied to a constant that is likely to be a bit-flag. The result of logical-not is Boolean; it is incorrect to apply the bitwise-and (&) operator to a Boolean value. Use the ones-complement (~) operator to flip flags.
Example
The following code generates this warning:
#define FLAGS 0x4004
void f(int i)
{
if (i & !FLAGS) // warning
{
// code
}
}
To correct this warning, use the following code:
#define FLAGS 0x4004
void f(int i)
{
if (i & ~FLAGS)
{
// code
}
}