C++ short-circuiting of booleans

Question

I\'m new to c++ and am curious how the compiler handles lazy evaluation of booleans. For example,

if(A == 1 || B == 2){...}

If A does equal

Answer 1

The B==2 part is not evaluated.

Be careful! Don't put something like ++B==2 over there!

Answer 2

C++ applies short circuiting to Boolean expression evaluation so, the B == 2 is never evaluated and the compiler may even omit it entirely.