Use IntoIterator instead of slices

[hellow554]

Wouldn't it be handy to accept an iterator instead of a slice? Maybe like:

fn read_u32<T: IntoIterator>(buf: &T) -> u32;
fn write_u32<T: IntoIterator>(buf: &mut T, n: u32);

Maybe if you really need the amount of items of T you may use ExactSizeIterator instead of plain IntoIterator.

[BurntSushi]

No, sorry, this doesn't work. A fast implementation needs a slice.

[hellow554]

Alright, I can accept that argument ;)