Macro arrutil::split_to_array_mut

macro_rules! split_to_array_mut {
    ($source:expr, $len:expr) => { ... };
}

You can use split_to_array_mut to turn a mutable slice into a mutable reference to an array and a mutable slice starting from the end of the array.

Internally, it has the signature

fn split_to_array_mut<T>(source: &mut [T]) -> Option<(&mut [T; N], &mut [T])>

Externally, it should be seen as having the signature

slice_to_array_mut!(source: &mut [T], len: N) -> Option<(&mut [T; N], &mut [T])>

Where N is an integer literal and a valid array length.

Returns None when length is longer than slice.