Trait std::borrow::BorrowMut

pub trait BorrowMut<Borrowed>: Borrow<Borrowed> where Borrowed: ?Sized {
    fn borrow_mut(&mut self) -> &mut Borrowed;
}

A trait for mutably borrowing data.

Similar to Borrow, but for mutable borrows.

Required Methods

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

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);

Implementors

• impl<T> BorrowMut<T> for T where T: ?Sized
• impl<'a, T> BorrowMut<T> for &'a mut T where T: ?Sized
• impl<T> BorrowMut<[T]> for [T; 0]
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• impl<T> BorrowMut<[T]> for [T; 32]
• impl<T> BorrowMut<T> for Box<T> where T: ?Sized
• impl<T> BorrowMut<[T]> for Vec<T>