Macro array_refs

macro_rules! array_refs {
    ( $arr:expr, $( $pre:expr ),* ; .. ;  $( $post:expr ),* ) => { ... };
    ( $arr:expr, $( $len:expr ),* ) => { ... };
}

You can use array_refs to generate a series of array references to an input array reference. The idea is if you want to break an array into a series of contiguous and non-overlapping arrays. array_refs is a bit funny in that it insists on slicing up the entire array. This is intentional, as I find it handy to make me ensure that my sub-arrays add up to the entire array. This macro will never panic, since the sizes are all checked at compile time.

Note that unlike array_ref!, array_refs requires that the first argument be an array reference. The following arguments are the lengths of each subarray you wish a reference to. The total of these arguments must equal the size of the array itself.

#[macro_use]
extern crate arrayref;

fn read_u16(bytes: &[u8; 2]) -> u16 {
     bytes[0] as u16 + ((bytes[1] as u16) << 8)
}
// ...
let data = [0,1,2,3,4,0,6,7];
let (a,b,c) = array_refs![&data,2,2,4];
assert_eq!(read_u16(a), 256);
assert_eq!(read_u16(b), 3*256+2);
assert_eq!(*c, [4,0,6,7]);