add peek_while(predicate)

[foresterre]

No description provided.

[ForgottenMaster]

Just wondering about the intended semantics for peek_while. I think it's intended to be a similar API or return type as peek_range?

So the signature would be something like the following:

pub fn peek_while(&mut self, predicate: impl Fn(&I::Item) -> bool) -> &[Option<I::Item>]

Essentially will run through the iterator from the cursor position to find the position of the first element that doesn't satisfy the predicate anymore, getting all the items into the queue in the process

Then we just can do a peek_range from the cursor position to that end position to take the slice