# 1.0.0[−][src]Trait alloc::borrow::BorrowMut

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

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`

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

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

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

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

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

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

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

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`impl<T> BorrowMut<[T]> for [T; 0]`

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

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`impl<T> BorrowMut<[T]> for [T; 1]`

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

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`impl<T> BorrowMut<[T]> for [T; 2]`

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

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`impl<T> BorrowMut<[T]> for [T; 3]`

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

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`impl<T> BorrowMut<[T]> for [T; 4]`

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

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`impl<T> BorrowMut<[T]> for [T; 5]`

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

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`impl<T> BorrowMut<[T]> for [T; 6]`

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

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`impl<T> BorrowMut<[T]> for [T; 7]`

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

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`impl<T> BorrowMut<[T]> for [T; 8]`

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

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`impl<T> BorrowMut<[T]> for [T; 9]`

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

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`impl<T> BorrowMut<[T]> for [T; 10]`

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

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`impl<T> BorrowMut<[T]> for [T; 11]`

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

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`impl<T> BorrowMut<[T]> for [T; 12]`

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

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`impl<T> BorrowMut<[T]> for [T; 13]`

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

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`impl<T> BorrowMut<[T]> for [T; 14]`

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

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`impl<T> BorrowMut<[T]> for [T; 15]`

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

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`impl<T> BorrowMut<[T]> for [T; 16]`

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

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`impl<T> BorrowMut<[T]> for [T; 17]`

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

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`impl<T> BorrowMut<[T]> for [T; 18]`

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

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`impl<T> BorrowMut<[T]> for [T; 19]`

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

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`impl<T> BorrowMut<[T]> for [T; 20]`

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

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`impl<T> BorrowMut<[T]> for [T; 21]`

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

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`impl<T> BorrowMut<[T]> for [T; 22]`

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

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`impl<T> BorrowMut<[T]> for [T; 23]`

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

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`impl<T> BorrowMut<[T]> for [T; 24]`

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

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`impl<T> BorrowMut<[T]> for [T; 25]`

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

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`impl<T> BorrowMut<[T]> for [T; 26]`

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

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`impl<T> BorrowMut<[T]> for [T; 27]`

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

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`impl<T> BorrowMut<[T]> for [T; 28]`

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

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`impl<T> BorrowMut<[T]> for [T; 29]`

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

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`impl<T> BorrowMut<[T]> for [T; 30]`

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

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`impl<T> BorrowMut<[T]> for [T; 31]`

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

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`impl<T> BorrowMut<[T]> for [T; 32]`

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

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

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

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