Trait DropSome

pub trait DropSome {
    // Required method
    fn drop_some(self) -> Option<()>;
}

Option -> Option<()>

Required Methods

fn drop_some(self) -> Option<()>

Only drop Ok value, no drop Err value.

Example

use drop_some::DropSome;

fn some_function() -> Option<()>
{
 match "something"
 {
  "pattern-x" => some_task1().drop_some()?,
  "pattern-y" => some_task2().drop_some()?,
  "pattern-z" => some_task3()?,
  "pattern-w" => some_task4(),
  _ => ()
 }
 Ok(())
}

fn some_task1()     -> Option<i8     > { Some(1) }
fn some_task2<'a>() -> Option<&'a str> { Some("abc") }
fn some_task3()     -> Option<()     > { Some(()) }
fn some_task4() { }

See also: https://github.com/usagi/drop_some/tests/test.rs

Implementations on Foreign Types

impl<V> DropSome for Option<V>

fn drop_some(self) -> Option<()>

Implementors