what is typeof((c) + 1) in C

Question

I came across an expression in C like

typeof((c) + 1) _tmp = c;

What exactly does this mean?

Thanks for the reply.

Just on

Answer 1

Typeof returns a type, and is evaluated at compile time.

The whole statement means declare a variable tmp with the same type as c (usually).

It might declare a related or different type, since the type of c+1 can be different to c. (this is more likely in c++).