Trait Add

pub trait Add<Rhs = Self> {
    type Output;

    // Required method
    fn add(self, rhs: Rhs) -> Self::Output;
}

The addition operator +.

Note that Rhs is Self by default, but this is not mandatory. For example, std::time::SystemTime implements Add<Duration>, which permits operations of the form SystemTime = SystemTime + Duration.

Examples

Addable points

use std::ops::Add;

#[derive(Debug, Copy, Clone, PartialEq)]
struct Point {
    x: i32,
    y: i32,
}

impl Add for Point {
    type Output = Self;

    fn add(self, other: Self) -> Self {
        Self {
            x: self.x + other.x,
            y: self.y + other.y,
        }
    }
}

assert_eq!(Point { x: 1, y: 0 } + Point { x: 2, y: 3 },
           Point { x: 3, y: 3 });

Implementing Add with generics

Here is an example of the same Point struct implementing the Add trait using generics.

use std::ops::Add;

#[derive(Debug, Copy, Clone, PartialEq)]
struct Point<T> {
    x: T,
    y: T,
}

// Notice that the implementation uses the associated type `Output`.
impl<T: Add<Output = T>> Add for Point<T> {
    type Output = Self;

    fn add(self, other: Self) -> Self::Output {
        Self {
            x: self.x + other.x,
            y: self.y + other.y,
        }
    }
}

assert_eq!(Point { x: 1, y: 0 } + Point { x: 2, y: 3 },
           Point { x: 3, y: 3 });

Required Associated Types

type Output

The resulting type after applying the + operator.

Required Methods

fn add(self, rhs: Rhs) -> Self::Output

Performs the + operation.

Example

assert_eq!(12 + 1, 13);

Implementors

impl Add for f16

type Output = f16

impl Add for f32

type Output = f32

impl Add for f64

type Output = f64

impl Add for f128

type Output = f128

impl Add for i8

type Output = i8

impl Add for i16

type Output = i16

impl Add for i32

type Output = i32

impl Add for i64

type Output = i64

impl Add for i128

type Output = i128

impl Add for isize

type Output = isize

impl Add for u8

type Output = u8

impl Add for u16

type Output = u16

impl Add for u32

type Output = u32

impl Add for u64

type Output = u64

impl Add for u128

type Output = u128

impl Add for usize

type Output = usize

impl Add for Assume

type Output = Assume

impl Add for Saturating<i8>

type Output = Saturating<i8>

impl Add for Saturating<i16>

type Output = Saturating<i16>

impl Add for Saturating<i32>

type Output = Saturating<i32>

impl Add for Saturating<i64>

type Output = Saturating<i64>

impl Add for Saturating<i128>

type Output = Saturating<i128>

impl Add for Saturating<isize>

type Output = Saturating<isize>

impl Add for Saturating<u8>

type Output = Saturating<u8>

impl Add for Saturating<u16>

type Output = Saturating<u16>

impl Add for Saturating<u32>

type Output = Saturating<u32>

impl Add for Saturating<u64>

type Output = Saturating<u64>

impl Add for Saturating<u128>

type Output = Saturating<u128>

impl Add for Saturating<usize>

type Output = Saturating<usize>

impl Add for Wrapping<i8>

type Output = Wrapping<i8>

impl Add for Wrapping<i16>

type Output = Wrapping<i16>

impl Add for Wrapping<i32>

type Output = Wrapping<i32>

impl Add for Wrapping<i64>

type Output = Wrapping<i64>

impl Add for Wrapping<i128>

type Output = Wrapping<i128>

impl Add for Wrapping<isize>

type Output = Wrapping<isize>

impl Add for Wrapping<u8>

type Output = Wrapping<u8>

impl Add for Wrapping<u16>

type Output = Wrapping<u16>

impl Add for Wrapping<u32>

type Output = Wrapping<u32>

impl Add for Wrapping<u64>

type Output = Wrapping<u64>

impl Add for Wrapping<u128>

type Output = Wrapping<u128>

impl Add for Wrapping<usize>

type Output = Wrapping<usize>

impl Add for Duration

type Output = Duration

impl Add for TimeDelta

type Output = TimeDelta

impl Add<&f16> for &f16

type Output = <f16 as Add>::Output

impl Add<&f16> for f16

type Output = <f16 as Add>::Output

impl Add<&f32> for &f32

type Output = <f32 as Add>::Output

impl Add<&f32> for f32

type Output = <f32 as Add>::Output

impl Add<&f64> for &f64

type Output = <f64 as Add>::Output

impl Add<&f64> for f64

type Output = <f64 as Add>::Output

impl Add<&f128> for &f128

type Output = <f128 as Add>::Output

impl Add<&f128> for f128

type Output = <f128 as Add>::Output

impl Add<&i8> for &i8

type Output = <i8 as Add>::Output

impl Add<&i8> for i8

type Output = <i8 as Add>::Output

impl Add<&i16> for &i16

type Output = <i16 as Add>::Output

impl Add<&i16> for i16

type Output = <i16 as Add>::Output

impl Add<&i32> for &i32

type Output = <i32 as Add>::Output

impl Add<&i32> for i32

type Output = <i32 as Add>::Output

impl Add<&i64> for &i64

type Output = <i64 as Add>::Output

impl Add<&i64> for i64

type Output = <i64 as Add>::Output

impl Add<&i128> for &i128

type Output = <i128 as Add>::Output

impl Add<&i128> for i128

type Output = <i128 as Add>::Output

impl Add<&isize> for &isize

type Output = <isize as Add>::Output

impl Add<&isize> for isize

type Output = <isize as Add>::Output

impl Add<&str> for String

Implements the + operator for concatenating two strings.

This consumes the String on the left-hand side and re-uses its buffer (growing it if necessary). This is done to avoid allocating a new String and copying the entire contents on every operation, which would lead to O(n^2) running time when building an n-byte string by repeated concatenation.

The string on the right-hand side is only borrowed; its contents are copied into the returned String.

Examples

Concatenating two Strings takes the first by value and borrows the second:

let a = String::from("hello");
let b = String::from(" world");
let c = a + &b;
// `a` is moved and can no longer be used here.

If you want to keep using the first String, you can clone it and append to the clone instead:

let a = String::from("hello");
let b = String::from(" world");
let c = a.clone() + &b;
// `a` is still valid here.

Concatenating &str slices can be done by converting the first to a String:

let a = "hello";
let b = " world";
let c = a.to_string() + b;

type Output = String

impl Add<&u8> for &u8

type Output = <u8 as Add>::Output

impl Add<&u8> for u8

type Output = <u8 as Add>::Output

impl Add<&u16> for &u16

type Output = <u16 as Add>::Output

impl Add<&u16> for u16

type Output = <u16 as Add>::Output

impl Add<&u32> for &u32

type Output = <u32 as Add>::Output

impl Add<&u32> for u32

type Output = <u32 as Add>::Output

impl Add<&u64> for &u64

type Output = <u64 as Add>::Output

impl Add<&u64> for u64

type Output = <u64 as Add>::Output

impl Add<&u128> for &u128

type Output = <u128 as Add>::Output

impl Add<&u128> for u128

type Output = <u128 as Add>::Output

impl Add<&usize> for &usize

type Output = <usize as Add>::Output

impl Add<&usize> for usize

type Output = <usize as Add>::Output

impl Add<&Saturating<i8>> for &Saturating<i8>

type Output = <Saturating<i8> as Add>::Output

impl Add<&Saturating<i8>> for Saturating<i8>

type Output = <Saturating<i8> as Add>::Output

impl Add<&Saturating<i16>> for &Saturating<i16>

type Output = <Saturating<i16> as Add>::Output

impl Add<&Saturating<i16>> for Saturating<i16>

type Output = <Saturating<i16> as Add>::Output

impl Add<&Saturating<i32>> for &Saturating<i32>

type Output = <Saturating<i32> as Add>::Output

impl Add<&Saturating<i32>> for Saturating<i32>

type Output = <Saturating<i32> as Add>::Output

impl Add<&Saturating<i64>> for &Saturating<i64>

type Output = <Saturating<i64> as Add>::Output

impl Add<&Saturating<i64>> for Saturating<i64>

type Output = <Saturating<i64> as Add>::Output

impl Add<&Saturating<i128>> for &Saturating<i128>

type Output = <Saturating<i128> as Add>::Output

impl Add<&Saturating<i128>> for Saturating<i128>

type Output = <Saturating<i128> as Add>::Output

impl Add<&Saturating<isize>> for &Saturating<isize>

type Output = <Saturating<isize> as Add>::Output

impl Add<&Saturating<isize>> for Saturating<isize>

type Output = <Saturating<isize> as Add>::Output

impl Add<&Saturating<u8>> for &Saturating<u8>

type Output = <Saturating<u8> as Add>::Output

impl Add<&Saturating<u8>> for Saturating<u8>

type Output = <Saturating<u8> as Add>::Output

impl Add<&Saturating<u16>> for &Saturating<u16>

type Output = <Saturating<u16> as Add>::Output

impl Add<&Saturating<u16>> for Saturating<u16>

type Output = <Saturating<u16> as Add>::Output

impl Add<&Saturating<u32>> for &Saturating<u32>

type Output = <Saturating<u32> as Add>::Output

impl Add<&Saturating<u32>> for Saturating<u32>

type Output = <Saturating<u32> as Add>::Output

impl Add<&Saturating<u64>> for &Saturating<u64>

type Output = <Saturating<u64> as Add>::Output

impl Add<&Saturating<u64>> for Saturating<u64>

type Output = <Saturating<u64> as Add>::Output

impl Add<&Saturating<u128>> for &Saturating<u128>

type Output = <Saturating<u128> as Add>::Output

impl Add<&Saturating<u128>> for Saturating<u128>

type Output = <Saturating<u128> as Add>::Output

impl Add<&Saturating<usize>> for &Saturating<usize>

type Output = <Saturating<usize> as Add>::Output

impl Add<&Saturating<usize>> for Saturating<usize>

type Output = <Saturating<usize> as Add>::Output

impl Add<&Wrapping<i8>> for &Wrapping<i8>

type Output = <Wrapping<i8> as Add>::Output

impl Add<&Wrapping<i8>> for Wrapping<i8>

type Output = <Wrapping<i8> as Add>::Output

impl Add<&Wrapping<i16>> for &Wrapping<i16>

type Output = <Wrapping<i16> as Add>::Output

impl Add<&Wrapping<i16>> for Wrapping<i16>

type Output = <Wrapping<i16> as Add>::Output

impl Add<&Wrapping<i32>> for &Wrapping<i32>

type Output = <Wrapping<i32> as Add>::Output

impl Add<&Wrapping<i32>> for Wrapping<i32>

type Output = <Wrapping<i32> as Add>::Output

impl Add<&Wrapping<i64>> for &Wrapping<i64>

type Output = <Wrapping<i64> as Add>::Output

impl Add<&Wrapping<i64>> for Wrapping<i64>

type Output = <Wrapping<i64> as Add>::Output

impl Add<&Wrapping<i128>> for &Wrapping<i128>

type Output = <Wrapping<i128> as Add>::Output

impl Add<&Wrapping<i128>> for Wrapping<i128>

type Output = <Wrapping<i128> as Add>::Output

impl Add<&Wrapping<isize>> for &Wrapping<isize>

type Output = <Wrapping<isize> as Add>::Output

impl Add<&Wrapping<isize>> for Wrapping<isize>

type Output = <Wrapping<isize> as Add>::Output

impl Add<&Wrapping<u8>> for &Wrapping<u8>

type Output = <Wrapping<u8> as Add>::Output

impl Add<&Wrapping<u8>> for Wrapping<u8>

type Output = <Wrapping<u8> as Add>::Output

impl Add<&Wrapping<u16>> for &Wrapping<u16>

type Output = <Wrapping<u16> as Add>::Output

impl Add<&Wrapping<u16>> for Wrapping<u16>

type Output = <Wrapping<u16> as Add>::Output

impl Add<&Wrapping<u32>> for &Wrapping<u32>

type Output = <Wrapping<u32> as Add>::Output

impl Add<&Wrapping<u32>> for Wrapping<u32>

type Output = <Wrapping<u32> as Add>::Output

impl Add<&Wrapping<u64>> for &Wrapping<u64>

type Output = <Wrapping<u64> as Add>::Output

impl Add<&Wrapping<u64>> for Wrapping<u64>

type Output = <Wrapping<u64> as Add>::Output

impl Add<&Wrapping<u128>> for &Wrapping<u128>

type Output = <Wrapping<u128> as Add>::Output

impl Add<&Wrapping<u128>> for Wrapping<u128>

type Output = <Wrapping<u128> as Add>::Output

impl Add<&Wrapping<usize>> for &Wrapping<usize>

type Output = <Wrapping<usize> as Add>::Output

impl Add<&Wrapping<usize>> for Wrapping<usize>

type Output = <Wrapping<usize> as Add>::Output

impl Add<Duration> for std::time::Instant

type Output = Instant

impl Add<Duration> for SystemTime

type Output = SystemTime

impl Add<Duration> for NaiveDateTime

Add std::time::Duration to NaiveDateTime.

As a part of Chrono’s [leap second handling], the addition assumes that there is no leap second ever, except when the NaiveDateTime itself represents a leap second in which case the assumption becomes that there is exactly a single leap second ever.

Panics

Panics if the resulting date would be out of range. Consider using NaiveDateTime::checked_add_signed to get an Option instead.

type Output = NaiveDateTime

impl Add<Duration> for NaiveTime

Add std::time::Duration to NaiveTime.

This wraps around and never overflows or underflows. In particular the addition ignores integral number of days.

type Output = NaiveTime

impl Add<Duration> for Instant

type Output = Instant

impl Add<Months> for NaiveDate

Add Months to NaiveDate.

The result will be clamped to valid days in the resulting month, see checked_add_months for details.

Panics

Panics if the resulting date would be out of range. Consider using NaiveDate::checked_add_months to get an Option instead.

Example

use chrono::{Months, NaiveDate};

let from_ymd = |y, m, d| NaiveDate::from_ymd_opt(y, m, d).unwrap();

assert_eq!(from_ymd(2014, 1, 1) + Months::new(1), from_ymd(2014, 2, 1));
assert_eq!(from_ymd(2014, 1, 1) + Months::new(11), from_ymd(2014, 12, 1));
assert_eq!(from_ymd(2014, 1, 1) + Months::new(12), from_ymd(2015, 1, 1));
assert_eq!(from_ymd(2014, 1, 1) + Months::new(13), from_ymd(2015, 2, 1));
assert_eq!(from_ymd(2014, 1, 31) + Months::new(1), from_ymd(2014, 2, 28));
assert_eq!(from_ymd(2020, 1, 31) + Months::new(1), from_ymd(2020, 2, 29));

type Output = NaiveDate

impl Add<Months> for NaiveDateTime

Add Months to NaiveDateTime.

The result will be clamped to valid days in the resulting month, see checked_add_months for details.

Panics

Panics if the resulting date would be out of range. Consider using checked_add_months to get an Option instead.

Example

use chrono::{Months, NaiveDate};

assert_eq!(
    NaiveDate::from_ymd_opt(2014, 1, 1).unwrap().and_hms_opt(1, 0, 0).unwrap() + Months::new(1),
    NaiveDate::from_ymd_opt(2014, 2, 1).unwrap().and_hms_opt(1, 0, 0).unwrap()
);
assert_eq!(
    NaiveDate::from_ymd_opt(2014, 1, 1).unwrap().and_hms_opt(0, 2, 0).unwrap()
        + Months::new(11),
    NaiveDate::from_ymd_opt(2014, 12, 1).unwrap().and_hms_opt(0, 2, 0).unwrap()
);
assert_eq!(
    NaiveDate::from_ymd_opt(2014, 1, 1).unwrap().and_hms_opt(0, 0, 3).unwrap()
        + Months::new(12),
    NaiveDate::from_ymd_opt(2015, 1, 1).unwrap().and_hms_opt(0, 0, 3).unwrap()
);
assert_eq!(
    NaiveDate::from_ymd_opt(2014, 1, 1).unwrap().and_hms_opt(0, 0, 4).unwrap()
        + Months::new(13),
    NaiveDate::from_ymd_opt(2015, 2, 1).unwrap().and_hms_opt(0, 0, 4).unwrap()
);
assert_eq!(
    NaiveDate::from_ymd_opt(2014, 1, 31).unwrap().and_hms_opt(0, 5, 0).unwrap()
        + Months::new(1),
    NaiveDate::from_ymd_opt(2014, 2, 28).unwrap().and_hms_opt(0, 5, 0).unwrap()
);
assert_eq!(
    NaiveDate::from_ymd_opt(2020, 1, 31).unwrap().and_hms_opt(6, 0, 0).unwrap()
        + Months::new(1),
    NaiveDate::from_ymd_opt(2020, 2, 29).unwrap().and_hms_opt(6, 0, 0).unwrap()
);

type Output = NaiveDateTime

impl Add<Days> for NaiveDate

Add Days to NaiveDate.

Panics

Panics if the resulting date would be out of range. Consider using NaiveDate::checked_add_days to get an Option instead.

type Output = NaiveDate

impl Add<Days> for NaiveDateTime

Add Days to NaiveDateTime.

Panics

Panics if the resulting date would be out of range. Consider using checked_add_days to get an Option instead.

type Output = NaiveDateTime

impl Add<FixedOffset> for NaiveDateTime

Add FixedOffset to NaiveDateTime.

Panics

Panics if the resulting date would be out of range. Consider using checked_add_offset to get an Option instead.

type Output = NaiveDateTime

impl Add<FixedOffset> for NaiveTime

Add FixedOffset to NaiveTime.

This wraps around and never overflows or underflows. In particular the addition ignores integral number of days.

type Output = NaiveTime

impl Add<TimeDelta> for NaiveDate

Add TimeDelta to NaiveDate.

This discards the fractional days in TimeDelta, rounding to the closest integral number of days towards TimeDelta::zero().

Panics

Panics if the resulting date would be out of range. Consider using NaiveDate::checked_add_signed to get an Option instead.

Example

use chrono::{NaiveDate, TimeDelta};

let from_ymd = |y, m, d| NaiveDate::from_ymd_opt(y, m, d).unwrap();

assert_eq!(from_ymd(2014, 1, 1) + TimeDelta::zero(), from_ymd(2014, 1, 1));
assert_eq!(from_ymd(2014, 1, 1) + TimeDelta::try_seconds(86399).unwrap(), from_ymd(2014, 1, 1));
assert_eq!(
    from_ymd(2014, 1, 1) + TimeDelta::try_seconds(-86399).unwrap(),
    from_ymd(2014, 1, 1)
);
assert_eq!(from_ymd(2014, 1, 1) + TimeDelta::try_days(1).unwrap(), from_ymd(2014, 1, 2));
assert_eq!(from_ymd(2014, 1, 1) + TimeDelta::try_days(-1).unwrap(), from_ymd(2013, 12, 31));
assert_eq!(from_ymd(2014, 1, 1) + TimeDelta::try_days(364).unwrap(), from_ymd(2014, 12, 31));
assert_eq!(
    from_ymd(2014, 1, 1) + TimeDelta::try_days(365 * 4 + 1).unwrap(),
    from_ymd(2018, 1, 1)
);
assert_eq!(
    from_ymd(2014, 1, 1) + TimeDelta::try_days(365 * 400 + 97).unwrap(),
    from_ymd(2414, 1, 1)
);

type Output = NaiveDate

impl Add<TimeDelta> for NaiveDateTime

Add TimeDelta to NaiveDateTime.

As a part of Chrono’s leap second handling, the addition assumes that there is no leap second ever, except when the NaiveDateTime itself represents a leap second in which case the assumption becomes that there is exactly a single leap second ever.

Panics

Panics if the resulting date would be out of range. Consider using NaiveDateTime::checked_add_signed to get an Option instead.

Example

use chrono::{NaiveDate, TimeDelta};

let from_ymd = |y, m, d| NaiveDate::from_ymd_opt(y, m, d).unwrap();

let d = from_ymd(2016, 7, 8);
let hms = |h, m, s| d.and_hms_opt(h, m, s).unwrap();
assert_eq!(hms(3, 5, 7) + TimeDelta::zero(), hms(3, 5, 7));
assert_eq!(hms(3, 5, 7) + TimeDelta::try_seconds(1).unwrap(), hms(3, 5, 8));
assert_eq!(hms(3, 5, 7) + TimeDelta::try_seconds(-1).unwrap(), hms(3, 5, 6));
assert_eq!(hms(3, 5, 7) + TimeDelta::try_seconds(3600 + 60).unwrap(), hms(4, 6, 7));
assert_eq!(
    hms(3, 5, 7) + TimeDelta::try_seconds(86_400).unwrap(),
    from_ymd(2016, 7, 9).and_hms_opt(3, 5, 7).unwrap()
);
assert_eq!(
    hms(3, 5, 7) + TimeDelta::try_days(365).unwrap(),
    from_ymd(2017, 7, 8).and_hms_opt(3, 5, 7).unwrap()
);

let hmsm = |h, m, s, milli| d.and_hms_milli_opt(h, m, s, milli).unwrap();
assert_eq!(hmsm(3, 5, 7, 980) + TimeDelta::try_milliseconds(450).unwrap(), hmsm(3, 5, 8, 430));

Leap seconds are handled, but the addition assumes that it is the only leap second happened.

let leap = hmsm(3, 5, 59, 1_300);
assert_eq!(leap + TimeDelta::zero(), hmsm(3, 5, 59, 1_300));
assert_eq!(leap + TimeDelta::try_milliseconds(-500).unwrap(), hmsm(3, 5, 59, 800));
assert_eq!(leap + TimeDelta::try_milliseconds(500).unwrap(), hmsm(3, 5, 59, 1_800));
assert_eq!(leap + TimeDelta::try_milliseconds(800).unwrap(), hmsm(3, 6, 0, 100));
assert_eq!(leap + TimeDelta::try_seconds(10).unwrap(), hmsm(3, 6, 9, 300));
assert_eq!(leap + TimeDelta::try_seconds(-10).unwrap(), hmsm(3, 5, 50, 300));
assert_eq!(leap + TimeDelta::try_days(1).unwrap(),
           from_ymd(2016, 7, 9).and_hms_milli_opt(3, 5, 59, 300).unwrap());

type Output = NaiveDateTime

impl Add<TimeDelta> for NaiveTime

Add TimeDelta to NaiveTime.

This wraps around and never overflows or underflows. In particular the addition ignores integral number of days.

As a part of Chrono’s leap second handling, the addition assumes that there is no leap second ever, except when the NaiveTime itself represents a leap second in which case the assumption becomes that there is exactly a single leap second ever.

Example

use chrono::{NaiveTime, TimeDelta};

let from_hmsm = |h, m, s, milli| NaiveTime::from_hms_milli_opt(h, m, s, milli).unwrap();

assert_eq!(from_hmsm(3, 5, 7, 0) + TimeDelta::zero(), from_hmsm(3, 5, 7, 0));
assert_eq!(from_hmsm(3, 5, 7, 0) + TimeDelta::try_seconds(1).unwrap(), from_hmsm(3, 5, 8, 0));
assert_eq!(from_hmsm(3, 5, 7, 0) + TimeDelta::try_seconds(-1).unwrap(), from_hmsm(3, 5, 6, 0));
assert_eq!(
    from_hmsm(3, 5, 7, 0) + TimeDelta::try_seconds(60 + 4).unwrap(),
    from_hmsm(3, 6, 11, 0)
);
assert_eq!(
    from_hmsm(3, 5, 7, 0) + TimeDelta::try_seconds(7 * 60 * 60 - 6 * 60).unwrap(),
    from_hmsm(9, 59, 7, 0)
);
assert_eq!(
    from_hmsm(3, 5, 7, 0) + TimeDelta::try_milliseconds(80).unwrap(),
    from_hmsm(3, 5, 7, 80)
);
assert_eq!(
    from_hmsm(3, 5, 7, 950) + TimeDelta::try_milliseconds(280).unwrap(),
    from_hmsm(3, 5, 8, 230)
);
assert_eq!(
    from_hmsm(3, 5, 7, 950) + TimeDelta::try_milliseconds(-980).unwrap(),
    from_hmsm(3, 5, 6, 970)
);

The addition wraps around.

assert_eq!(from_hmsm(3, 5, 7, 0) + TimeDelta::try_seconds(22*60*60).unwrap(), from_hmsm(1, 5, 7, 0));
assert_eq!(from_hmsm(3, 5, 7, 0) + TimeDelta::try_seconds(-8*60*60).unwrap(), from_hmsm(19, 5, 7, 0));
assert_eq!(from_hmsm(3, 5, 7, 0) + TimeDelta::try_days(800).unwrap(), from_hmsm(3, 5, 7, 0));

Leap seconds are handled, but the addition assumes that it is the only leap second happened.

let leap = from_hmsm(3, 5, 59, 1_300);
assert_eq!(leap + TimeDelta::zero(), from_hmsm(3, 5, 59, 1_300));
assert_eq!(leap + TimeDelta::try_milliseconds(-500).unwrap(), from_hmsm(3, 5, 59, 800));
assert_eq!(leap + TimeDelta::try_milliseconds(500).unwrap(), from_hmsm(3, 5, 59, 1_800));
assert_eq!(leap + TimeDelta::try_milliseconds(800).unwrap(), from_hmsm(3, 6, 0, 100));
assert_eq!(leap + TimeDelta::try_seconds(10).unwrap(), from_hmsm(3, 6, 9, 300));
assert_eq!(leap + TimeDelta::try_seconds(-10).unwrap(), from_hmsm(3, 5, 50, 300));
assert_eq!(leap + TimeDelta::try_days(1).unwrap(), from_hmsm(3, 5, 59, 300));

type Output = NaiveTime

impl<'a> Add for Cow<'a, str>

type Output = Cow<'a, str>

impl<'a> Add<&'a str> for Cow<'a, str>

type Output = Cow<'a, str>

impl<'a> Add<f16> for &'a f16

type Output = <f16 as Add>::Output

impl<'a> Add<f32> for &'a f32

type Output = <f32 as Add>::Output

impl<'a> Add<f64> for &'a f64

type Output = <f64 as Add>::Output

impl<'a> Add<f128> for &'a f128

type Output = <f128 as Add>::Output

impl<'a> Add<i8> for &'a i8

type Output = <i8 as Add>::Output

impl<'a> Add<i16> for &'a i16

type Output = <i16 as Add>::Output

impl<'a> Add<i32> for &'a i32

type Output = <i32 as Add>::Output

impl<'a> Add<i64> for &'a i64

type Output = <i64 as Add>::Output

impl<'a> Add<i128> for &'a i128

type Output = <i128 as Add>::Output

impl<'a> Add<isize> for &'a isize

type Output = <isize as Add>::Output

impl<'a> Add<u8> for &'a u8

type Output = <u8 as Add>::Output

impl<'a> Add<u16> for &'a u16

type Output = <u16 as Add>::Output

impl<'a> Add<u32> for &'a u32

type Output = <u32 as Add>::Output

impl<'a> Add<u64> for &'a u64

type Output = <u64 as Add>::Output

impl<'a> Add<u128> for &'a u128

type Output = <u128 as Add>::Output

impl<'a> Add<usize> for &'a usize

type Output = <usize as Add>::Output

impl<'a> Add<Saturating<i8>> for &'a Saturating<i8>

type Output = <Saturating<i8> as Add>::Output

impl<'a> Add<Saturating<i16>> for &'a Saturating<i16>

type Output = <Saturating<i16> as Add>::Output

impl<'a> Add<Saturating<i32>> for &'a Saturating<i32>

type Output = <Saturating<i32> as Add>::Output

impl<'a> Add<Saturating<i64>> for &'a Saturating<i64>

type Output = <Saturating<i64> as Add>::Output

impl<'a> Add<Saturating<i128>> for &'a Saturating<i128>

type Output = <Saturating<i128> as Add>::Output

impl<'a> Add<Saturating<isize>> for &'a Saturating<isize>

type Output = <Saturating<isize> as Add>::Output

impl<'a> Add<Saturating<u8>> for &'a Saturating<u8>

type Output = <Saturating<u8> as Add>::Output

impl<'a> Add<Saturating<u16>> for &'a Saturating<u16>

type Output = <Saturating<u16> as Add>::Output

impl<'a> Add<Saturating<u32>> for &'a Saturating<u32>

type Output = <Saturating<u32> as Add>::Output

impl<'a> Add<Saturating<u64>> for &'a Saturating<u64>

type Output = <Saturating<u64> as Add>::Output

impl<'a> Add<Saturating<u128>> for &'a Saturating<u128>

type Output = <Saturating<u128> as Add>::Output

impl<'a> Add<Saturating<usize>> for &'a Saturating<usize>

type Output = <Saturating<usize> as Add>::Output

impl<'a> Add<Wrapping<i8>> for &'a Wrapping<i8>

type Output = <Wrapping<i8> as Add>::Output

impl<'a> Add<Wrapping<i16>> for &'a Wrapping<i16>

type Output = <Wrapping<i16> as Add>::Output

impl<'a> Add<Wrapping<i32>> for &'a Wrapping<i32>

type Output = <Wrapping<i32> as Add>::Output

impl<'a> Add<Wrapping<i64>> for &'a Wrapping<i64>

type Output = <Wrapping<i64> as Add>::Output

impl<'a> Add<Wrapping<i128>> for &'a Wrapping<i128>

type Output = <Wrapping<i128> as Add>::Output

impl<'a> Add<Wrapping<isize>> for &'a Wrapping<isize>

type Output = <Wrapping<isize> as Add>::Output

impl<'a> Add<Wrapping<u8>> for &'a Wrapping<u8>

type Output = <Wrapping<u8> as Add>::Output

impl<'a> Add<Wrapping<u16>> for &'a Wrapping<u16>

type Output = <Wrapping<u16> as Add>::Output

impl<'a> Add<Wrapping<u32>> for &'a Wrapping<u32>

type Output = <Wrapping<u32> as Add>::Output

impl<'a> Add<Wrapping<u64>> for &'a Wrapping<u64>

type Output = <Wrapping<u64> as Add>::Output

impl<'a> Add<Wrapping<u128>> for &'a Wrapping<u128>

type Output = <Wrapping<u128> as Add>::Output

impl<'a> Add<Wrapping<usize>> for &'a Wrapping<usize>

type Output = <Wrapping<usize> as Add>::Output

impl<'lhs, 'rhs, T, const N: usize> Add<&'rhs Simd<T, N>> for &'lhs Simd<T, N>

where T: SimdElement, Simd<T, N>: Add<Output = Simd<T, N>>, LaneCount<N>: SupportedLaneCount,

type Output = Simd<T, N>

impl<T, const N: usize> Add<&Simd<T, N>> for Simd<T, N>

where T: SimdElement, Simd<T, N>: Add<Output = Simd<T, N>>, LaneCount<N>: SupportedLaneCount,

type Output = Simd<T, N>

impl<T, const N: usize> Add<Simd<T, N>> for &Simd<T, N>

where T: SimdElement, Simd<T, N>: Add<Output = Simd<T, N>>, LaneCount<N>: SupportedLaneCount,

type Output = Simd<T, N>

impl<Tz> Add<Duration> for DateTime<Tz>

where Tz: TimeZone,

Add std::time::Duration to DateTime.

As a part of Chrono’s [leap second handling], the addition assumes that there is no leap second ever, except when the NaiveDateTime itself represents a leap second in which case the assumption becomes that there is exactly a single leap second ever.

Panics

Panics if the resulting date would be out of range. Consider using DateTime<Tz>::checked_add_signed to get an Option instead.

type Output = DateTime<Tz>

impl<Tz> Add<Months> for DateTime<Tz>

where Tz: TimeZone,

Add Months to DateTime.

The result will be clamped to valid days in the resulting month, see checked_add_months for details.

Panics

Panics if:

• The resulting date would be out of range.
• The local time at the resulting date does not exist or is ambiguous, for example during a daylight saving time transition.

Strongly consider using DateTime<Tz>::checked_add_months to get an Option instead.

type Output = DateTime<Tz>

impl<Tz> Add<Days> for DateTime<Tz>

where Tz: TimeZone,

Add Days to NaiveDateTime.

Panics

Panics if:

• The resulting date would be out of range.
• The local time at the resulting date does not exist or is ambiguous, for example during a daylight saving time transition.

Strongly consider using DateTime<Tz>::checked_sub_days to get an Option instead.

type Output = DateTime<Tz>

impl<Tz> Add<FixedOffset> for DateTime<Tz>

where Tz: TimeZone,

Add FixedOffset to the datetime value of DateTime (offset remains unchanged).

Panics

Panics if the resulting date would be out of range.

type Output = DateTime<Tz>

impl<Tz> Add<TimeDelta> for Date<Tz>

where Tz: TimeZone,

type Output = Date<Tz>

impl<Tz> Add<TimeDelta> for DateTime<Tz>

where Tz: TimeZone,

Add TimeDelta to DateTime.

As a part of Chrono’s [leap second handling], the addition assumes that there is no leap second ever, except when the NaiveDateTime itself represents a leap second in which case the assumption becomes that there is exactly a single leap second ever.

Panics

Panics if the resulting date would be out of range. Consider using DateTime<Tz>::checked_add_signed to get an Option instead.

type Output = DateTime<Tz>

impl<const N: usize> Add for Simd<f32, N>

where f32: SimdElement, LaneCount<N>: SupportedLaneCount,

type Output = Simd<f32, N>

impl<const N: usize> Add for Simd<f64, N>

where f64: SimdElement, LaneCount<N>: SupportedLaneCount,

type Output = Simd<f64, N>

impl<const N: usize> Add for Simd<i8, N>

where i8: SimdElement, LaneCount<N>: SupportedLaneCount,

type Output = Simd<i8, N>

impl<const N: usize> Add for Simd<i16, N>

where i16: SimdElement, LaneCount<N>: SupportedLaneCount,

type Output = Simd<i16, N>

impl<const N: usize> Add for Simd<i32, N>

where i32: SimdElement, LaneCount<N>: SupportedLaneCount,

type Output = Simd<i32, N>

impl<const N: usize> Add for Simd<i64, N>

where i64: SimdElement, LaneCount<N>: SupportedLaneCount,

type Output = Simd<i64, N>

impl<const N: usize> Add for Simd<isize, N>

where isize: SimdElement, LaneCount<N>: SupportedLaneCount,

type Output = Simd<isize, N>

impl<const N: usize> Add for Simd<u8, N>

where u8: SimdElement, LaneCount<N>: SupportedLaneCount,

type Output = Simd<u8, N>

impl<const N: usize> Add for Simd<u16, N>

where u16: SimdElement, LaneCount<N>: SupportedLaneCount,

type Output = Simd<u16, N>

impl<const N: usize> Add for Simd<u32, N>

where u32: SimdElement, LaneCount<N>: SupportedLaneCount,

type Output = Simd<u32, N>

impl<const N: usize> Add for Simd<u64, N>

where u64: SimdElement, LaneCount<N>: SupportedLaneCount,

type Output = Simd<u64, N>

impl<const N: usize> Add for Simd<usize, N>

where usize: SimdElement, LaneCount<N>: SupportedLaneCount,

type Output = Simd<usize, N>