Trait std::borrow::BorrowMut

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

用于可变借用数据的 trait。

作为 Borrow<T> 的伴侣，此 trait 通过提供变量引用允许类型借用作为基础类型。 请参见 Borrow<T>，以了解更多有关借用另一种类型的信息。

Required methods

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

从拥有的值中借用。

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 BorrowMut<str> for String

pub fn borrow_mut(&mut self) -> &mut str

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

pub fn borrow_mut(&mut self) -> &mut T

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

pub fn borrow_mut(&mut self) -> &mut [T]

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

pub fn borrow_mut(&mut self) -> &mut T

impl<T, A> BorrowMut<T> for Box<T, A> where
    T: ?Sized,
    A: Allocator, 

pub fn borrow_mut(&mut self) -> &mut T

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

pub fn borrow_mut(&mut self) -> &mut [T]