#syntax-sugar #option #drop-some #drop-some

drop_some

.drop_some syntax sugar for Option. It’s instead of .map(|_|()).

2 stable releases

1.0.1 Aug 10, 2020

#730 in Rust patterns

25 downloads per month
Used in web-sugars

MIT license

3KB

drop_some

  • This crate defines DropSome trait and impl for Option.
  • DropSome trait has .drop_some(self) -> Option<()> function.
  • This is a syntax sugar for .map(|_|()).

Useful scene

fn some_function() -> Option<()>
{
 match switcher
 {
  pattern_a => some_task1().drop_some()?
  pattern_b => some_task2().drop_some()?
  pattern_c => some_task3()?
  pattern_d => some_task4()
  _ => ()
 }
}

fn some_task1()     -> Option<i8     > { /* abbr */ }
fn some_task2<'a>() -> Option<&'a str> { /* abbr */ }
fn some_task3()     -> Option<()     > { /* abbr */ }
fn some_task4() { /* abbr */ }
  • See also: <tests/test.rs>

Note

"I don't need it, because ..."

  • Yes, your are right to your world.
    • But, I tired to type/see .map(|_|()). So I'm happy with.drop_some().

LICENSE

Author

No runtime deps