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