const-generic array splitting · Issue #74674 · rust-lang/rust (original) (raw)

Creating a new issue about const-generic array splitting methods since it's been discussed on the array_chunks PR, where it really doesn't belong.

We probably want

impl [T] { fn split_array(&self) -> Option<(&[T; N], &[T])> { ... } }

// requires more const generics work to be accepted by rustc AFAIK impl<T, const N: usize> [T; N] { fn split_array(&self) -> (&[T; M], &[T; {N - M}]) { ... } }

The possibility of a variadic array splitting function was also mentioned (at least that's my interpretation) but since there's not even an active RFC about variadic generics, I think that's a bit out of scope. The only thing one could do once the second split_array above becomes possible is add split_array_2, split_array_3 and so on.