#source
    
    do {
        true;
        "Hello, world!";
    } while none;
    false;

#bytecode
    
begin:
    PUSHTRU;
    POP 1;
    PUSHSTR "Hello, world!";
    POP 1;
    PUSHNNE;
    JUMPIFANDPOP begin;
    PUSHFLS;
    POP 1;
    EXIT;