Trait std::borrow::BorrowMut

pub trait BorrowMut<Borrowed>: Borrow<Borrowed> where    Borrowed: ?Sized, {
    fn borrow_mut(&mut self) -> &mut BorrowedⓘNotable traits for &'_ mut Fimpl<'_, 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

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 R
impl<W: Write + ?Sized, '_> Write for &'_ mut W

Mutably borrows from an owned value.


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];

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impl BorrowMut<str> for String[src]

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

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

impl<T> BorrowMut<T> for Box<T> where
    T: ?Sized

impl<T> BorrowMut<T> for T where
    T: ?Sized

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

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© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.