Trait elliptic_curve::ops::Add 1.0.0[−][src]
Expand description
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
Add
able 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 });
Associated Types
Required methods
Implementations on Foreign Types
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 String
s 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;
Panics
This function may panic if the resulting point in time cannot be represented by the
underlying data structure. See SystemTime::checked_add
for a version without panic.
type Output = SystemTime
UTerm + B0 = UTerm
PInt + Z0 = PInt
UInt<Ul, B1> + UInt<Ur, B1> = UInt<(Ul + Ur) + B1, B0>
UTerm + B1 = UInt<UTerm, B1>
U + B0 = U
impl<U> Add<U> for UTerm where
U: Unsigned,
impl<U> Add<U> for UTerm where
U: Unsigned,
UTerm + U = U
NInt + Z0 = NInt
UInt<U, B1> + B1 = UInt<U + B1, B0>
impl Add<ATerm> for ATerm
impl Add<ATerm> for ATerm
UInt<Ul, B1> + UInt<Ur, B0> = UInt<Ul + Ur, B1>
impl<Ul, Ur> Add<PInt<Ur>> for NInt<Ul> where
Ul: Unsigned + NonZero,
Ur: Unsigned + NonZero + Cmp<Ul> + PrivateIntegerAdd<<Ur as Cmp<Ul>>::Output, Ul>,
impl<Ul, Ur> Add<PInt<Ur>> for NInt<Ul> where
Ul: Unsigned + NonZero,
Ur: Unsigned + NonZero + Cmp<Ul> + PrivateIntegerAdd<<Ur as Cmp<Ul>>::Output, Ul>,
N(Ul) + P(Ur)
: We resolve this with our PrivateAdd
impl<U, B> Add<UTerm> for UInt<U, B> where
U: Unsigned,
B: Bit,
impl<U, B> Add<UTerm> for UInt<U, B> where
U: Unsigned,
B: Bit,
UInt<U, B> + UTerm = UInt<U, B>
UInt<Ul, B0> + UInt<Ur, B0> = UInt<Ul + Ur, B0>
P(Ul) + P(Ur) = P(Ul + Ur)
UInt<Ul, B0> + UInt<Ur, B1> = UInt<Ul + Ur, B1>
UInt<U, B0> + B1 = UInt<U + B1>
N(Ul) + N(Ur) = N(Ul + Ur)
impl<Ul, Ur> Add<NInt<Ur>> for PInt<Ul> where
Ul: Unsigned + NonZero + Cmp<Ur> + PrivateIntegerAdd<<Ul as Cmp<Ur>>::Output, Ur>,
Ur: Unsigned + NonZero,
impl<Ul, Ur> Add<NInt<Ur>> for PInt<Ul> where
Ul: Unsigned + NonZero + Cmp<Ur> + PrivateIntegerAdd<<Ul as Cmp<Ur>>::Output, Ur>,
Ur: Unsigned + NonZero,
P(Ul) + N(Ur)
: We resolve this with our PrivateAdd