Trait std::borrow::BorrowMut1.0.0[−][src]

pub trait BorrowMut<Borrowed>: Borrow<Borrowed> where
    Borrowed: ?Sized, {
    pub fn borrow_mut(&mut self) -> &mut Borrowedⓘ
Notable traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
    F: Unpin + Future + ?Sized,     type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
    I: Iterator + ?Sized,     type Item = <I as Iterator>::Item;impl<R: Read + ?Sized> Read for &mut Rimpl<W: Write + ?Sized> Write for &mut W
;
}

A trait for mutably borrowing data.

As a companion to Borrow<T> this trait allows a type to borrow as an underlying type by providing a mutable reference. See Borrow<T> for more information on borrowing as another type.

Required methods

pub fn borrow_mut(&mut self) -> &mut Borrowedⓘ

Notable traits for &'_ mut F

impl<'_, F> Future for &'_ mut F where
    F: Unpin + Future + ?Sized,  type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;impl<R: Read + ?Sized> Read for &mut Rimpl<W: Write + ?Sized> Write for &mut W
[src]

Mutably borrows from an owned value.

Examples

use std::borrow::BorrowMut;

fn check<T: BorrowMut<[i32]>>(mut v: T) {
    assert_eq!(&mut [1, 2, 3], v.borrow_mut());
}

let v = vec![1, 2, 3];

check(v);
Run
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Implementors

impl BorrowMut<str> for String1.36.0[src]

impl<'_, T> BorrowMut<T> for &'_ mut T where
    T: ?Sized, [src]

impl<T> BorrowMut<[T]> for Vec<T, Global>[src]

impl<T> BorrowMut<T> for T where
    T: ?Sized, [src]

impl<T, A> BorrowMut<T> for Box<T, A> where
    T: ?Sized,
    A: Allocator, 1.1.0[src]

impl<T, const N: usize> BorrowMut<[T]> for [T; N]1.4.0[src]

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