#include <fstream.hfa>
#include <mutex_stmt.hfa>
#include <locks.hfa>

ofstream & f() {
        return sout;
}

single_acquisition_lock APPLE, BANANA, c, d;

int main() {
        mutex( sout ) sout | 3 | 4 | 5;
        mutex( [ f(), [ APPLE, [ c, d ], BANANA ] ] ) sout | 7 | 8 | 9;
        mutex( [ [ APPLE, BANANA ], [ c, d ]] ) sout | 0 | 1 | 2;
}