One thing I am missing more and more in the Rust ecosystem is a set of iterators that can handle Result and Option elements. Or rather, what I need is to make decisions based on the Some/Ok-ness of those elements. For example, stop processing when an element yields a None or an Err, and then return the error.
As far as I know, currently often the best way to handle situations like this is to largely avoid the Iterator methods (e.g. map, filter) altogether in favor of for-loops. The problems with this are
that it is verbose to do (it's not just the for-loop but also the error handling code) and
that it often requires an intermediate allocation.
Does anyone know of a crate that can help with this e.g. by reducing boilerplate and preventing the allocation?
Well the ones defined on Iterator in stdlib don't cover handling Option and Result at all. They just leave an option open to do it yourself with the downsides mentioned before.
What I'm looking for is a crate that allows me to not deal with those downsides.
Hmm, seems like your code is useful, since it fills exactly OPs use case.. would you be interested in cargo publishing it? Or maybe a pull request for itertools?
I also didn't immediately notice it was a link, but that's on me for custom-theming the rust forums and then forgetting to make hyperlinks an easily recognizable color.
Having looked at them: these iterators look pretty nice, so I agree with the suggestion @juleskers made about adding them to either itertools or another crate. If it's at all feasible for you, I encourage you to do so.
