Use expect instead of unwrap in Add and Sub impls

src/datetime/mod.rs

@@ -1252,7 +1252,8 @@ impl<Tz: TimeZone> Add<FixedOffset> for DateTime<Tz> {
 
     #[inline]
     fn add(mut self, rhs: FixedOffset) -> DateTime<Tz> {
-        self.datetime = self.naive_utc().checked_add_offset(rhs).unwrap();
+        self.datetime =
+            self.naive_utc().checked_add_offset(rhs).expect("`DateTime + FixedOffset` overflowed");
         self
     }
 }
@@ -1261,7 +1262,7 @@ impl<Tz: TimeZone> Add<Months> for DateTime<Tz> {
     type Output = DateTime<Tz>;
 
     fn add(self, rhs: Months) -> Self::Output {
-        self.checked_add_months(rhs).unwrap()
+        self.checked_add_months(rhs).expect("`DateTime + Months` out of range")
     }
 }
 
@@ -1309,7 +1310,8 @@ impl<Tz: TimeZone> Sub<FixedOffset> for DateTime<Tz> {
 
     #[inline]
     fn sub(mut self, rhs: FixedOffset) -> DateTime<Tz> {
-        self.datetime = self.naive_utc().checked_sub_offset(rhs).unwrap();
+        self.datetime =
+            self.naive_utc().checked_sub_offset(rhs).expect("`DateTime - FixedOffset` overflowed");
         self
     }
 }
@@ -1318,7 +1320,7 @@ impl<Tz: TimeZone> Sub<Months> for DateTime<Tz> {
     type Output = DateTime<Tz>;
 
     fn sub(self, rhs: Months) -> Self::Output {
-        self.checked_sub_months(rhs).unwrap()
+        self.checked_sub_months(rhs).expect("`DateTime - Months` out of range")
     }
 }
 
@@ -1344,15 +1346,15 @@ impl<Tz: TimeZone> Add<Days> for DateTime<Tz> {
     type Output = DateTime<Tz>;
 
     fn add(self, days: Days) -> Self::Output {
-        self.checked_add_days(days).unwrap()
+        self.checked_add_days(days).expect("`DateTime + Days` out of range")
     }
 }
 
 impl<Tz: TimeZone> Sub<Days> for DateTime<Tz> {
     type Output = DateTime<Tz>;
 
     fn sub(self, days: Days) -> Self::Output {
-        self.checked_sub_days(days).unwrap()
+        self.checked_sub_days(days).expect("`DateTime - Days` out of range")
     }
 }
 

src/naive/date.rs

@@ -1889,7 +1889,7 @@ impl Add<Months> for NaiveDate {
     /// assert_eq!(from_ymd(2020, 1, 31) + Months::new(1), from_ymd(2020, 2, 29));
     /// ```
     fn add(self, months: Months) -> Self::Output {
-        self.checked_add_months(months).unwrap()
+        self.checked_add_months(months).expect("`NaiveDate + Months` out of range")
     }
 }
 
@@ -1914,23 +1914,23 @@ impl Sub<Months> for NaiveDate {
     /// assert_eq!(from_ymd(2014, 1, 1) - Months::new(13), from_ymd(2012, 12, 1));
     /// ```
     fn sub(self, months: Months) -> Self::Output {
-        self.checked_sub_months(months).unwrap()
+        self.checked_sub_months(months).expect("`NaiveDate - Months` out of range")
     }
 }
 
 impl Add<Days> for NaiveDate {
     type Output = NaiveDate;
 
     fn add(self, days: Days) -> Self::Output {
-        self.checked_add_days(days).unwrap()
+        self.checked_add_days(days).expect("`NaiveDate + Days` out of range")
     }
 }
 
 impl Sub<Days> for NaiveDate {
     type Output = NaiveDate;
 
     fn sub(self, days: Days) -> Self::Output {
-        self.checked_sub_days(days).unwrap()
+        self.checked_sub_days(days).expect("`NaiveDate - Days` out of range")
     }
 }
 

src/naive/datetime/mod.rs

@@ -1624,7 +1624,7 @@ impl Add<FixedOffset> for NaiveDateTime {
 
     #[inline]
     fn add(self, rhs: FixedOffset) -> NaiveDateTime {
-        self.checked_add_offset(rhs).unwrap()
+        self.checked_add_offset(rhs).expect("`NaiveDateTime + FixedOffset` out of range")
     }
 }
 
@@ -1668,7 +1668,7 @@ impl Add<Months> for NaiveDateTime {
     /// );
     /// ```
     fn add(self, rhs: Months) -> Self::Output {
-        Self { date: self.date.checked_add_months(rhs).unwrap(), time: self.time }
+        self.checked_add_months(rhs).expect("`NaiveDateTime + Months` out of range")
     }
 }
 
@@ -1760,7 +1760,7 @@ impl Sub<FixedOffset> for NaiveDateTime {
 
     #[inline]
     fn sub(self, rhs: FixedOffset) -> NaiveDateTime {
-        self.checked_sub_offset(rhs).unwrap()
+        self.checked_sub_offset(rhs).expect("`NaiveDateTime - FixedOffset` out of range")
     }
 }
 
@@ -1792,7 +1792,7 @@ impl Sub<Months> for NaiveDateTime {
     type Output = NaiveDateTime;
 
     fn sub(self, rhs: Months) -> Self::Output {
-        Self { date: self.date.checked_sub_months(rhs).unwrap(), time: self.time }
+        self.checked_sub_months(rhs).expect("`NaiveDateTime - Months` out of range")
     }
 }
 
@@ -1848,15 +1848,15 @@ impl Add<Days> for NaiveDateTime {
     type Output = NaiveDateTime;
 
     fn add(self, days: Days) -> Self::Output {
-        self.checked_add_days(days).unwrap()
+        self.checked_add_days(days).expect("`NaiveDateTime + Days` out of range")
     }
 }
 
 impl Sub<Days> for NaiveDateTime {
     type Output = NaiveDateTime;
 
     fn sub(self, days: Days) -> Self::Output {
-        self.checked_sub_days(days).unwrap()
+        self.checked_sub_days(days).expect("`NaiveDateTime - Days` out of range")
     }
 }