I don't understand

[HighbrowManiac]

i = 2, ~i = -3

[booradley60]

http://en.wikipedia.org/wiki/Two%27s_complement

2 = 0000 0010
-3 = 1111 1101

[vlad from moscow]

Whether this code is valid depends on what type i has and if i is a user-defined type whether operator ~ is overload such a way that it returns a lvalue.

If i has some fundamental type as for example int then the code shall not be compiled because ~i is prvalue.

EDIT: it is a very bad idea to remove the original post.

[HighbrowManiac]

You're right, I put it back.