collundef_t
static collundef_t *currundef;
const collundef_t *c1 = n1;
const collundef_t *c2 = n2;
offsetof(collundef_t, avl));
static collundef_t *
collundef_t srch;
collundef_t *ud;
collundef_t *c;
collundef_t *cu;