mainposition     1387 host/minilua.c Node*n=mainposition(t,key);
mainposition     1582 host/minilua.c Node*mp=mainposition(t,key);
mainposition     1590 host/minilua.c othern=mainposition(t,key2tval(mp));
mainposition     1643 host/minilua.c Node*n=mainposition(t,key);