#include <iostream>

class one {
	char ch;
	unsigned dest :  21 ;
	unsigned term :  1 ;
};

class two {
	unsigned last :  1 ;
};

class three {
	unsigned llast :  1 ;
	unsigned rlast :  1 ;
};

class final : one, two {
};

class final2 : one, three {
};

int main(int argc, char *argv[]) {
	std::cout << sizeof(final) << std::endl; // expect 4; 12 given
	std::cout << sizeof(final2) << std::endl; // expect 4; 12 given

	return  0 ;
}

#define INJECT_TWO_PROPS() unsigned last :  1 ;
#define INJECT_THREE_PROPS() unsigned llast :  1 ; unsigned rlast :  1 ;

class final {
	char ch;
	unsigned dest :  21 ;
	unsigned term :  1 ;

	INJECT_TWO_PROPS();
};

class final2 {
	char ch;
	unsigned dest :  21 ;
	unsigned term :  1 ;

	INJECT_THREE_PROPS();
};