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

• MIT

Author

• USAGI.NETWORK / Usagi Ito https://github.com/usagi/