Traits

std::default

std::default::Default

trait Default {
    fn default() -> Self;
}

Constructs a default value of a type.

Implementations:

impl Default for Field { .. }

impl Default for i8 { .. }
impl Default for i16 { .. }
impl Default for i32 { .. }
impl Default for i64 { .. }

impl Default for u8 { .. }
impl Default for u16 { .. }
impl Default for u32 { .. }
impl Default for u64 { .. }

impl Default for () { .. }
impl Default for bool { .. }

impl<T, N> Default for [T; N]
    where T: Default { .. }

impl<A, B> Default for (A, B)
    where A: Default, B: Default { .. }

impl<A, B, C> Default for (A, B, C)
    where A: Default, B: Default, C: Default { .. }

impl<A, B, C, D> Default for (A, B, C, D)
    where A: Default, B: Default, C: Default, D: Default { .. }

impl<A, B, C, D, E> Default for (A, B, C, D, E)
    where A: Default, B: Default, C: Default, D: Default, E: Default { .. }

For primitive integer types, the return value of default is 0. Container types such as arrays are filled with default values of their element type.

std::cmp

std::cmp::Eq

trait Eq {
    fn eq(self, other: Self) -> bool;
}

Returns true if self is equal to other. Implementing this trait on a type allows the type to be used with == and !=.

Implementations:

impl Eq for Field { .. }

impl Eq for i8 { .. }
impl Eq for i16 { .. }
impl Eq for i32 { .. }
impl Eq for i64 { .. }

impl Eq for u8 { .. }
impl Eq for u16 { .. }
impl Eq for u32 { .. }
impl Eq for u64 { .. }

impl Eq for () { .. }
impl Eq for bool { .. }

impl<T, N> Eq for [T; N]
    where T: Eq { .. }

impl<A, B> Eq for (A, B)
    where A: Eq, B: Eq { .. }

impl<A, B, C> Eq for (A, B, C)
    where A: Eq, B: Eq, C: Eq { .. }

impl<A, B, C, D> Eq for (A, B, C, D)
    where A: Eq, B: Eq, C: Eq, D: Eq { .. }

impl<A, B, C, D, E> Eq for (A, B, C, D, E)
    where A: Eq, B: Eq, C: Eq, D: Eq, E: Eq { .. }

std::cmp::Cmp

trait Cmp {
    fn cmp(self, other: Self) -> Ordering;
}

a.cmp(b) compares two values returning Ordering::less() if a < b, Ordering::equal() if a == b, or Ordering::greater() if a > b. Implementing this trait on a type allows <, <=, >, and >= to be used on values of the type.

Implementations:

impl Ord for u8 { .. }
impl Ord for u16 { .. }
impl Ord for u32 { .. }
impl Ord for u64 { .. }

impl Ord for i8 { .. }
impl Ord for i16 { .. }
impl Ord for i32 { .. }

impl Ord for i64 { .. }

impl Ord for () { .. }
impl Ord for bool { .. }

impl<T, N> Ord for [T; N]
    where T: Ord { .. }

impl<A, B> Ord for (A, B)
    where A: Ord, B: Ord { .. }

impl<A, B, C> Ord for (A, B, C)
    where A: Ord, B: Ord, C: Ord { .. }

impl<A, B, C, D> Ord for (A, B, C, D)
    where A: Ord, B: Ord, C: Ord, D: Ord { .. }

impl<A, B, C, D, E> Ord for (A, B, C, D, E)
    where A: Ord, B: Ord, C: Ord, D: Ord, E: Ord { .. }

std::ops

std::ops::Add, std::ops::Sub, std::ops::Mul, and std::ops::Div

These traits abstract over addition, subtraction, multiplication, and division respectively. Implementing these traits for a given type will also allow that type to be used with the corresponding operator for that trait (+ for Add, etc) in addition to the normal method names.

trait Add {
    fn add(self, other: Self) -> Self;
}

trait Sub {
    fn sub(self, other: Self) -> Self;
}

trait Mul {
    fn mul(self, other: Self) -> Self;
}

trait Div {
    fn div(self, other: Self) -> Self;
}

The implementations block below is given for the Add trait, but the same types that implement Add also implement Sub, Mul, and Div.

Implementations:

impl Add for Field { .. }

impl Add for i8 { .. }
impl Add for i16 { .. }
impl Add for i32 { .. }
impl Add for i64 { .. }

impl Add for u8 { .. }
impl Add for u16 { .. }
impl Add for u32 { .. }
impl Add for u64 { .. }

std::ops::Rem

trait Rem {
    fn rem(self, other: Self) -> Self;
}

Rem::rem(a, b) is the remainder function returning the result of what is left after dividing a and b. Implementing Rem allows the % operator to be used with the implementation type.

Unlike other numeric traits, Rem is not implemented for Field.

Implementations:

impl Rem for u8 { fn rem(self, other: u8) -> u8 { self % other } }
impl Rem for u16 { fn rem(self, other: u16) -> u16 { self % other } }
impl Rem for u32 { fn rem(self, other: u32) -> u32 { self % other } }
impl Rem for u64 { fn rem(self, other: u64) -> u64 { self % other } }

impl Rem for i8 { fn rem(self, other: i8) -> i8 { self % other } }
impl Rem for i16 { fn rem(self, other: i16) -> i16 { self % other } }
impl Rem for i32 { fn rem(self, other: i32) -> i32 { self % other } }
impl Rem for i64 { fn rem(self, other: i64) -> i64 { self % other } }

std::ops::{ BitOr, BitAnd, BitXor }

trait BitOr {
    fn bitor(self, other: Self) -> Self;
}

trait BitAnd {
    fn bitand(self, other: Self) -> Self;
}

trait BitXor {
    fn bitxor(self, other: Self) -> Self;
}

Traits for the bitwise operations |, &, and ^.

Implementing BitOr, BitAnd or BitXor for a type allows the |, &, or ^ operator respectively to be used with the type.

The implementations block below is given for the BitOr trait, but the same types that implement BitOr also implement BitAnd and BitXor.

Implementations:

impl BitOr for bool { fn bitor(self, other: bool) -> bool { self | other } }

impl BitOr for u8 { fn bitor(self, other: u8) -> u8 { self | other } }
impl BitOr for u16 { fn bitor(self, other: u16) -> u16 { self | other } }
impl BitOr for u32 { fn bitor(self, other: u32) -> u32 { self | other } }
impl BitOr for u64 { fn bitor(self, other: u64) -> u64 { self | other } }

impl BitOr for i8 { fn bitor(self, other: i8) -> i8 { self | other } }
impl BitOr for i16 { fn bitor(self, other: i16) -> i16 { self | other } }
impl BitOr for i32 { fn bitor(self, other: i32) -> i32 { self | other } }
impl BitOr for i64 { fn bitor(self, other: i64) -> i64 { self | other } }

std::ops::{ Shl, Shr }

trait Shl {
    fn shl(self, other: Self) -> Self;
}

trait Shr {
    fn shr(self, other: Self) -> Self;
}

Traits for a bit shift left and bit shift right.

Implementing Shl for a type allows the left shift operator (<<) to be used with the implementation type. Similarly, implementing Shr allows the right shift operator (>>) to be used with the type.

Note that bit shifting is not currently implemented for signed types.

The implementations block below is given for the Shl trait, but the same types that implement Shl also implement Shr.

Implementations:

impl Shl for u8 { fn shl(self, other: u8) -> u8 { self << other } }
impl Shl for u16 { fn shl(self, other: u16) -> u16 { self << other } }
impl Shl for u32 { fn shl(self, other: u32) -> u32 { self << other } }
impl Shl for u64 { fn shl(self, other: u64) -> u64 { self << other } }