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You can convert an `Option` into a `Result` and then use the `try!` macro, all in a single line: http://stackoverflow.com/a/37890739/46571 http://stackoverflow.

You can convert an `Option` into a `Result` and then use the `try!` macro, all in a single line: http://stackoverflow.com/a/37890739/46571 http://stackoverflow.com/a/37890739/46571

glandium 10y ago
But Iterator's next() returns an Option, not a Result.
- catnaroek 10y ago
  I don't see why you'd want to manipulate iterators by hand, unless you're implementing custom iterators. But, in any case: try!(iter.next().ok_or("end of sequence")) EDIT: Sorry. I was just being dense.
  - glandium 10y ago
    Check out the code that goes along the "no try! for Option" comment in the OP: it is implementing a custom iterator.
    - catnaroek 10y ago
      Oh, my bad. I guess `try!` isn't a good enough replacement for properly treating `Option` and `Result` as monads.