func (t *Iterator) Next(dst interface{}) (string, error) {
	t.fetchMore()
	if t.err != nil {
		return "", t.err
	}

	var doc *pb.Document
	var exprs []*pb.Field
	switch {
	case len(t.listRes) != 0:
		doc = t.listRes[0]
		t.listRes = t.listRes[1:]
	case len(t.searchRes) != 0:
		doc = t.searchRes[0].Document
		exprs = t.searchRes[0].Expression
		t.searchCursor = t.searchRes[0].Cursor
		t.searchRes = t.searchRes[1:]
	default:
		return "", Done
	}
	if doc == nil {
		return "", errors.New("search: internal error: no document returned")
	}
	if !t.idsOnly && dst != nil {
		if err := loadDoc(dst, doc, exprs); err != nil {
			return "", err
		}
	}
	return doc.GetId(), nil
}
func (t *Iterator) Next(dst interface{}) (string, error) {
	t.fetchMore()
	if t.err != nil {
		return "", t.err
	}

	var doc *pb.Document
	var exprs []*pb.Field
	switch {
	case len(t.listRes) != 0:
		doc = t.listRes[0]
		t.listRes = t.listRes[1:]
	case len(t.searchRes) != 0:
		doc = t.searchRes[0].Document
		exprs = t.searchRes[0].Expression
		t.searchCursor = t.searchRes[0].Cursor
		t.searchRes = t.searchRes[1:]
	default:
		return "", Done
	}
	if doc == nil {
		return "", errors.New("search: internal error: no document returned")
	}
	if !t.idsOnly && dst != nil {
		if err := loadDoc(dst, doc, exprs); err != nil {
			return "", err
		}
	}
	return doc.GetId(), nil
}
func ( t * Iterator ) Next ( dst interface { } ) ( string , error ) { t . fetchMore ( ) if t . err != nil { return " " , t . err } var doc * pb . Document var exprs [ ] * pb . Field switch { case len ( t . listRes ) != 0 : doc = t . listRes [ 0 ] t . listRes = t . listRes [ 1 : ] case len ( t . searchRes ) != 0 : doc = t . searchRes [ 0 ] . Document exprs = t . searchRes [ 0 ] . Expression t . searchCursor = t . searchRes [ 0 ] . Cursor t . searchRes = t . searchRes [ 1 : ] default : return " " , Done } if doc == nil { return " " , errors . New ( " " ) } if ! t . idsOnly && dst != nil { if err := loadDoc ( dst , doc , exprs ) ; err != nil { return " " , err } } return doc . GetId ( ) , nil }
// Next returns the ID of the next result. When there are no more results,
// Done is returned as the error.
//
// dst must be a non-nil struct pointer, implement the FieldLoadSaver
// interface, or be a nil interface value. If a non-nil dst is provided, it
// will be filled with the indexed fields. dst is ignored if this iterator was
// created with an IDsOnly option.
Next returns the ID of the next result . When there are no more results Done is returned as the error . dst must be a non - nil struct pointer implement the FieldLoadSaver interface or be a nil interface value . If a non - nil dst is provided it will be filled with the indexed fields . dst is ignored if this iterator was created with an IDsOnly option .