Promotion and assignment

[Tomás Ó hÉilidhe]

Take the following:

char unsigned i = 0, j = 5;
...
...
i &= j;

I'd like to see what happens in the last statement. If it were
identical to:

i = i & j;

then the follwoing would happen:
* On the right-hand side, both i and j would be promoted to either
signed int or unsigned int
* The bitwise AND would be performed on these two int's
* Then the result would be converted to an unsigned char to be stored
in i

Does exactly the same thing happen with i &= j?

 

[vippstar]

Take the following:

char unsigned i = 0, j = 5;
...
...
i &= j;

I'd like to see what happens in the last statement. If it were
identical to:

i = i & j;

then the follwoing would happen:
* On the right-hand side, both i and j would be promoted to either
signed int or unsigned int

Don't you mean int unsigned?

* The bitwise AND would be performed on these two int's
* Then the result would be converted to an unsigned char to be stored
in i

Does exactly the same thing happen with i &= j?

Yes, for the long answer see Mr Sosmans post.