src/tools/clippy/tests/ui/result_map_or_into_option.rs

   1 #![warn(clippy::result_map_or_into_option)]
   2
   3 fn main() {
   4     let opt: Result<u32, &str> = Ok(1);
   5     let _ = opt.map_or(None, Some);
   6
   7     let rewrap = |s: u32| -> Option<u32> { Some(s) };
   8
   9     // A non-Some `f` arg should not emit the lint
  10     let opt: Result<u32, &str> = Ok(1);
  11     let _ = opt.map_or(None, rewrap);
  12
  13     // A non-Some `f` closure where the argument is not used as the
  14     // return should not emit the lint
  15     let opt: Result<u32, &str> = Ok(1);
  16     _ = opt.map_or(None, |_x| Some(1));
  17 }