Trait core::borrow::BorrowMut

1.0.0 · source ·
pub trait BorrowMut<Borrowed: ?Sized>: Borrow<Borrowed> {
    // Required method
    fn borrow_mut(&mut self) -> &mut Borrowed;
Expand description

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§

1.0.0 · source

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

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];



1.4.0 · source§

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

1.0.0 · source§

impl<T: ?Sized> BorrowMut<T> for &mut T

1.0.0 · source§

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