859     pub fn checked_add_signed(self, rhs: OldDuration) -> Option<NaiveDate> {  in checked_add_signed()
863         let cycle = try_opt!((cycle as i32).checked_add(try_opt!(rhs.num_days().to_i32())));  in checked_add_signed()
895     pub fn checked_sub_signed(self, rhs: OldDuration) -> Option<NaiveDate> {  in checked_sub_signed()
899         let cycle = try_opt!((cycle as i32).checked_sub(try_opt!(rhs.num_days().to_i32())));  in checked_sub_signed()
934     pub fn signed_duration_since(self, rhs: NaiveDate) -> OldDuration {  in signed_duration_since()
936         let year2 = rhs.year();  in signed_duration_since()
940         let cycle2 = i64::from(internals::yo_to_cycle(year2_mod_400 as u32, rhs.of().ordinal()));  in signed_duration_since()
1389     fn add(self, rhs: OldDuration) -> NaiveDate {  in add()
1390         self.checked_add_signed(rhs).expect("`NaiveDate + Duration` overflowed")  in add()
1396     fn add_assign(&mut self, rhs: OldDuration) {  in add_assign()
1397         *self = self.add(rhs);  in add_assign()
1431     fn sub(self, rhs: OldDuration) -> NaiveDate {  in sub()
1432         self.checked_sub_signed(rhs).expect("`NaiveDate - Duration` overflowed")  in sub()
1438     fn sub_assign(&mut self, rhs: OldDuration) {  in sub_assign()
1439         *self = self.sub(rhs);  in sub_assign()
1474     fn sub(self, rhs: NaiveDate) -> OldDuration {  in sub()
1475         self.signed_duration_since(rhs)  in sub()
2025         fn check((y1,m1,d1): (i32, u32, u32), rhs: Duration, ymd: Option<(i32, u32, u32)>) {  in test_date_add()
2028             assert_eq!(lhs.checked_add_signed(rhs), sum);  in test_date_add()
2029             assert_eq!(lhs.checked_sub_signed(-rhs), sum);  in test_date_add()
2057             let rhs = NaiveDate::from_ymd(y2, m2, d2);  in test_date_sub()  localVariable
2058             assert_eq!(lhs.signed_duration_since(rhs), diff);  in test_date_sub()
2059             assert_eq!(rhs.signed_duration_since(lhs), -diff);  in test_date_sub()