Either
======
The enum ``Either`` with variants ``Left`` and ``Right`` and trait
implementations including Iterator, Read, Write.
Either has methods that are similar to Option and Result.
Includes convenience macros ``try_left!()`` and ``try_right!()`` to use for
short-circuiting logic.
Please read the `API documentation here`__
__ https://docs.rs/either/
|build_status|_ |crates|_
.. |build_status| image:: https://github.com/bluss/either/workflows/CI/badge.svg?branch=master
.. _build_status: https://github.com/bluss/either/actions
.. |crates| image:: https://img.shields.io/crates/v/either.svg
.. _crates: https://crates.io/crates/either
How to use with cargo::
[dependencies]
either = "1.8"
Recent Changes
--------------
- 1.9.0
- Add new methods ``.map_either()`` and ``.map_either_with()``, by @nasadorian (#82)
- 1.8.1
- Clarified that the multiple licenses are combined with OR.
- 1.8.0
- **MSRV**: ``either`` now requires Rust 1.36 or later.
- Add new methods ``.as_pin_ref()`` and ``.as_pin_mut()`` to project a
pinned ``Either`` as inner ``Pin`` variants, by @cuviper (#77)
- Implement the ``Future`` trait, by @cuviper (#77)
- Specialize more methods of the ``io`` traits, by @Kixunil and @cuviper (#75)
- 1.7.0
- **MSRV**: ``either`` now requires Rust 1.31 or later.
- Export the macro ``for_both!``, by @thomaseizinger (#58)
- Implement the ``io::Seek`` trait, by @Kerollmops (#60)
- Add new method ``.either_into()`` for ``Into`` conversion, by @TonalidadeHidrica (#63)
- Add new methods ``.factor_ok()``, ``.factor_err()``, and ``.factor_none()``,
by @zachs18 (#67)
- Specialize ``source`` in the ``Error`` implementation, by @thomaseizinger (#69)
- Specialize more iterator methods and implement the ``FusedIterator`` trait,
by @Ten0 (#66) and @cuviper (#71)
- Specialize ``Clone::clone_from``, by @cuviper (#72)
- 1.6.1
- Add new methods ``.expect_left()``, ``.unwrap_left()``,
and equivalents on the right, by @spenserblack (#51)
- 1.6.0
- Add new modules ``serde_untagged`` and ``serde_untagged_optional`` to customize
how ``Either`` fields are serialized in other types, by @MikailBag (#49)
- 1.5.3
- Add new method ``.map()`` for ``Either<T, T>`` by @nvzqz (#40).
- 1.5.2
- Add new methods ``.left_or()``, ``.left_or_default()``, ``.left_or_else()``,
and equivalents on the right, by @DCjanus (#36)
- 1.5.1
- Add ``AsRef`` and ``AsMut`` implementations for common unsized types:
``str``, ``[T]``, ``CStr``, ``OsStr``, and ``Path``, by @mexus (#29)
- 1.5.0
- Add new methods ``.factor_first()``, ``.factor_second()`` and ``.into_inner()``
by @mathstuf (#19)
- 1.4.0
- Add inherent method ``.into_iter()`` by @cuviper (#12)
- 1.3.0
- Add opt-in serde support by @hcpl
- 1.2.0
- Add method ``.either_with()`` by @Twey (#13)
- 1.1.0
- Add methods ``left_and_then``, ``right_and_then`` by @rampantmonkey
- Include license files in the repository and released crate
- 1.0.3
- Add crate categories
- 1.0.2
- Forward more ``Iterator`` methods
- Implement ``Extend`` for ``Either<L, R>`` if ``L, R`` do.
- 1.0.1
- Fix ``Iterator`` impl for ``Either`` to forward ``.fold()``.
- 1.0.0
- Add default crate feature ``use_std`` so that you can opt out of linking to
std.
- 0.1.7
- Add methods ``.map_left()``, ``.map_right()`` and ``.either()``.
- Add more documentation
- 0.1.3
- Implement Display, Error
- 0.1.2
- Add macros ``try_left!`` and ``try_right!``.
- 0.1.1
- Implement Deref, DerefMut
- 0.1.0
- Initial release
- Support Iterator, Read, Write
License
-------
Dual-licensed to be compatible with the Rust project.
Licensed under the Apache License, Version 2.0
https://www.apache.org/licenses/LICENSE-2.0 or the MIT license
https://opensource.org/licenses/MIT, at your
option. This file may not be copied, modified, or distributed
except according to those terms.
