CTL_NONE
if (c->type != CTL_NONE && c->addr == addr)
if (c->type == CTL_NONE)
if (c->type == CTL_NONE || c->scope != scope)
c->type = CTL_NONE;
c->type = CTL_NONE;
c->type : CTL_NONE;
if (type == CTL_NONE) {
$$ = CTL_NONE;