Single

This crate provides the Single trait for extracting the element from a single-element iterator.

License

You may use this crate under the MIT license or the Apache License 2.0 at your discretion.

Trait single::Single

rust pub trait Single: Iterator { fn single(self) -> Result<Self::Item, Error>; }

Required Methods

fn single(self) -> Result<Self::Item, Error>

Get the single element from a single-element iterator.

Examples

```rust assert_eq!(iter::empty::().single(), Err(single::Error::NoElements)); assert_eq!(iter::once(0).single(), Ok(0)); assert_eq!(iter::repeat(0).single(), Err(single::Error::MultipleElements)); ```

Implementors

rust impl<I: Iterator> Single for I {}