Function cast_slice

cmov/src/slice.rs:311–324

Performs an unsafe pointer cast from one slice type to the other. # Compile-time panics - If `T` and `U` differ in size - If `T` and `U` differ in alignment

(slice: &[T])

/// - If `T` and `U` differ in size
/// - If `T` and `U` differ in alignment
unsafe fn cast_slice<T, U>(slice: &[T]) -> &[U] {
    const {
        assert!(size_of::<T>() == size_of::<U>(), "T/U size differs");
        assert!(align_of::<T>() == align_of::<U>(), "T/U alignment differs");
    }

    // SAFETY:
    // - Slices are of same-sized/aligned types as asserted above.
    // - It's up to the caller to ensure the pointer cast from `T` to `U` itself is valid.
    #[allow(unsafe_code)]
    unsafe {
        &*(ptr::from_ref::<[T]>(slice) as *const [U])
    }
}

/// Performs an unsafe pointer cast from one mutable slice type to the other.
///