ways claim expressions during build c

i'm tidying adult comparison formula uses 'magic numbers' over place set hardware registers, i constants instead numbers formula rather some-more smooth (in fact map names/values used request registers).

however, i'm concerned volume changes i competence smack incantation numbers. here simplified instance (the register set some-more complex):

const brief mode0 = 0;
const brief mode1 = 1;
const brief mode2 = 2;

const brief state0 = 0;
const brief state1 = 4;
const brief state2 = 8;

so instead :

set_register(5);

we have:

set_register(state1|mode1);

what i'm looking build time chronicle of:

assert(5==(state1|mode1));

update

@christian, interjection discerning response, i'm prying c / non-boost sourroundings answer too since driver/kernel code.