Trait mmut::MutPair

pub trait MutPair {
    type Key;
    type Ret;
    fn mut_pair(
        &mut self, 
        key1: Self::Key, 
        key2: Self::Key
    ) -> Option<(&mut Self::Ret, &mut Self::Ret)>;
}

MutPair

Get mutalbe references to two locations in Collection by key.

use mmut::MutPair;

let mut v = vec![1, 2, 3, 4, 5];
{
    let (a, b) = v.mut_pair(1, 3).unwrap();
    *a = 8;
    *b = 7;
}
assert_eq!(v, vec![1, 8, 3, 7, 5]);

Associated Types

type Key

type Ret

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Required methods

fn mut_pair(
    &mut self,
    key1: Self::Key,
    key2: Self::Key
) -> Option<(&mut Self::Ret, &mut Self::Ret)>

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Implementations on Foreign Types

impl<T> MutPair for [T]

type Key = usize

type Ret = T

fn mut_pair(
    &mut self,
    key1: Self::Key,
    key2: Self::Key
) -> Option<(&mut Self::Ret, &mut Self::Ret)>

impl<T> MutPair for Vec<T>

type Key = usize

type Ret = T

fn mut_pair(
    &mut self,
    key1: Self::Key,
    key2: Self::Key
) -> Option<(&mut Self::Ret, &mut Self::Ret)>

impl<K: Eq + Hash, T> MutPair for HashMap<K, T>

type Key = K

type Ret = T

fn mut_pair(
    &mut self,
    key1: Self::Key,
    key2: Self::Key
) -> Option<(&mut Self::Ret, &mut Self::Ret)>

impl<K: Ord + Hash, T> MutPair for BTreeMap<K, T>

type Key = K

type Ret = T

fn mut_pair(
    &mut self,
    key1: Self::Key,
    key2: Self::Key
) -> Option<(&mut Self::Ret, &mut Self::Ret)>

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Implementors

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