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.
fn borrow_mut(&mut self) -> &mut Borrowed
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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];
check(v);
Run
Loading content...impl<T, const N: usize> BorrowMut<[T]> for [T; N]
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impl<T: ?Sized> BorrowMut<T> for &mut T
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impl<T: ?Sized> BorrowMut<T> for T
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