Trait drop_ok::DropOk

pub trait DropOk<E> {
    fn drop_ok(self) -> Result<(), E>;
}

Result<????, E> -> Result<(), E>

Required methods

fn drop_ok(self) -> Result<(), E>

Only drop Ok value, no drop Err value.

Example

use drop_ok::DropOk;

struct MyError{}

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

fn some_task1()     -> Result<i8     , MyError> { Ok(1) }
fn some_task2<'a>() -> Result<&'a str, MyError> { Ok("abc") }
fn some_task3()     -> Result<()     , MyError> { Ok(()) }
fn some_task4() { }

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

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Implementations on Foreign Types

impl<V, E> DropOk<E> for Result<V, E>

fn drop_ok(self) -> Result<(), E>

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Implementors

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