Trait vector2math::Pair

pub trait Pair: Sized {
    type Item;

    fn into_pair(self) -> (Self::Item, Self::Item);
    fn from_items(a: Self::Item, b: Self::Item) -> Self;
    fn first(&self) -> Self::Item;
    fn second(&self) -> Self::Item;

    fn pairwise<O, P, F, R>(self, other: O, f: F) -> P
    where
        O: Pair,
        P: Pair<Item = R>,
        F: Fn(Self::Item, O::Item) -> R,
    { ... }
    fn pair_iter(self) -> Chain2<Self::Item> { ... }
}

Trait for defining a pair of items of the same type.

This trait is meant to generalize having two similar things. It is implemented for (T, T) and [T; 2] with Item = T. However, because a pair does not necessarily have to be an actual pair It is also implemented for (T, T, T, T) and [T; 4] with Item = (T, T) and Item = [T; 2] respectively.

Required Associated Types

type Item

The type of the pair’s item

Required Methods

fn into_pair(self) -> (Self::Item, Self::Item)

Get the pair

fn from_items(a: Self::Item, b: Self::Item) -> Self

Create a pair from two items

fn first(&self) -> Self::Item

Get the first item

fn second(&self) -> Self::Item

Get the second item

Provided Methods

fn pairwise<O, P, F, R>(self, other: O, f: F) -> Pwhere
    O: Pair,
    P: Pair<Item = R>,
    F: Fn(Self::Item, O::Item) -> R,

Apply a function pairwise to the items of two pairs

fn pair_iter(self) -> Chain2<Self::Item>

Get an iterator over the pair’s items

Implementations on Foreign Types

impl<T> Pair for (T, T)where
    T: Clone,

type Item = T

fn into_pair(self) -> (Self::Item, Self::Item)

fn from_items(a: Self::Item, b: Self::Item) -> Self

fn first(&self) -> Self::Item

fn second(&self) -> Self::Item

impl<T> Pair for [T; 2]where
    T: Copy,

type Item = T

fn into_pair(self) -> (Self::Item, Self::Item)

fn from_items(a: Self::Item, b: Self::Item) -> Self

fn first(&self) -> Self::Item

fn second(&self) -> Self::Item

impl<T> Pair for (T, T, T, T)where
    T: Clone,

type Item = (T, T)

fn into_pair(self) -> (Self::Item, Self::Item)

fn from_items(a: Self::Item, b: Self::Item) -> Self

fn first(&self) -> Self::Item

fn second(&self) -> Self::Item

impl<T> Pair for [T; 4]where
    T: Copy,

type Item = [T; 2]

fn into_pair(self) -> (Self::Item, Self::Item)

fn from_items(a: Self::Item, b: Self::Item) -> Self

fn first(&self) -> Self::Item

fn second(&self) -> Self::Item

impl<T> Pair for (T, T, T, T, T, T)where
    T: Clone,

type Item = (T, T, T)

fn into_pair(self) -> (Self::Item, Self::Item)

fn from_items(a: Self::Item, b: Self::Item) -> Self

fn first(&self) -> Self::Item

fn second(&self) -> Self::Item

impl<T> Pair for [T; 6]where
    T: Copy,

type Item = [T; 3]

fn into_pair(self) -> (Self::Item, Self::Item)

fn from_items(a: Self::Item, b: Self::Item) -> Self

fn first(&self) -> Self::Item

fn second(&self) -> Self::Item

Implementors