A collection of helpful iterator adaptors for iterating over Result<T, E>
.
Here go some examples what you can do with the library.
- Altering T in
Iterator<Item = Result<T, E>>
iter.map(|r| r.map(|a| alter(a))) // stdlib
iter.map_ok(|a| alter(a)) // resiter
- Altering T in
Iterator<Item = Result<T, E>>
with a function that might fail:
iter.map(|r| r.and_then(|a| alter(a))) // stdlib
iter.and_then_ok(|a| alter(a)) // resiter
- Unpacking T in
Iterator<Item = Result<Option<T>, E>>
iter.map(|r| r.and_then(|o| o.ok_or_else(|| error()))) // stdlib
iter.inner_ok_or_else(|| error()) // resiter
- Executing code for each error in
Iterator<Item = Result<T, E>>
iter.map(|r| if let Err(e) = r { foo(); Err(e) } else { r })) // stdlib
iter.map(|r| r.map_err(|e| { foo(); e })) // stdlib
iter.on_err(|e| foo()) // resiter
MPL 2.0