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/// Trait for fixed size arrays.
pub unsafe trait Array {
    /// The array's element type
    type Item;
    #[doc(hidden)]
    fn as_ptr(&self) -> *const Self::Item;
    #[doc(hidden)]
    fn as_mut_ptr(&mut self) -> *mut Self::Item;
    #[doc(hidden)]
    fn capacity() -> usize;
}

macro_rules! fix_array_impl {
    ($len:expr ) => (
        unsafe impl<T> Array for [T; $len] {
            type Item = T;
            #[inline(always)]
            fn as_ptr(&self) -> *const T { self as *const _ as *const _ }
            #[inline(always)]
            fn as_mut_ptr(&mut self) -> *mut T { self as *mut _ as *mut _}
            #[inline(always)]
            fn capacity() -> usize { $len }
        }
    )
}

macro_rules! fix_array_impl_recursive {
    () => ();
    ($len:expr, $($more:expr,)*) => (
        fix_array_impl!($len);
        fix_array_impl_recursive!($($more,)*);
    );
}

fix_array_impl_recursive!(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
                          16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
                          32, 40, 48, 56, 64, 72, 96, 128, 160, 192, 224,);