isvectordef
if (isvectordef(type, REL_ALIAS)) {
!isvectordef(def->def.ty.old_type, def->def.ty.rel));
if (isvectordef(cs->type, cs->rel)) {
if (isvectordef(dflt->type, dflt->rel)) {
if (isvectordef(type, rel)) {
!isvectordef(def->def.ty.old_type, def->def.ty.rel));
int isvectordef(char *, relation);