# Trait core::array::FixedSizeArray [−] [src]

    pub unsafe trait FixedSizeArray<T> {
        fn as_slice(&self) -> &[T];
        fn as_mut_slice(&mut self) -> &mut [T];
    }

Unstable (`fixed_size_array` #27778)

: traits and impls are better expressed through generic integer constants

Utility trait implemented only on arrays of fixed size

This trait can be used to implement other traits on fixed-size arrays without causing much metadata bloat.

The trait is marked unsafe in order to restrict implementors to fixed-size arrays. User of this trait can assume that implementors have the exact layout in memory of a fixed size array (for example, for unsafe initialization).

Note that the traits AsRef and AsMut provide similar methods for types that may not be fixed-size arrays. Implementors should prefer those traits instead.

## Required Methods

### `fn as_slice(&self) -> &[T]`

Unstable (`fixed_size_array` #27778)

: traits and impls are better expressed through generic integer constants

Converts the array to immutable slice

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

Unstable (`fixed_size_array` #27778)

: traits and impls are better expressed through generic integer constants

Converts the array to mutable slice

## Implementors

- `impl<T, A: Unsize<[T]>> FixedSizeArray<T> for A`

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