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82 lines
4.0 KiB
Markdown
82 lines
4.0 KiB
Markdown
# Strum
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[](https://travis-ci.com/Peternator7/strum)
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[](https://ci.appveyor.com/project/Peternator7/strum)
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[](https://crates.io/crates/strum)
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[](https://docs.rs/strum)
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Strum is a set of macros and traits for working with enums and strings easier in Rust.
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# Compatibility
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Strum is currently with versions of rustc >= 1.32.0. Pull Requests that improve compatibility with older
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versions are welcome. The project goal is to support a rust version for at least 2 years after release
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and even longer is preferred since this project changes slowly.
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# Including Strum in Your Project
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Import strum and strum_macros into your project by adding the following lines to your
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Cargo.toml. Strum_macros contains the macros needed to derive all the traits in Strum.
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```toml
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[dependencies]
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strum = "0.23"
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strum_macros = "0.23"
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# You can also use the "derive" feature, and import the macros directly from "strum"
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# strum = { version = "0.23", features = ["derive"] }
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```
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# Strum Macros
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Strum has implemented the following macros:
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| Macro | Description |
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| --- | ----------- |
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| [EnumString] | Converts strings to enum variants based on their name. |
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| [Display] | Converts enum variants to strings |
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| [FromRepr] | Convert from an integer to an enum. |
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| [AsRefStr] | Implement `AsRef<str>` for `MyEnum` |
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| [IntoStaticStr] | Implements `From<MyEnum> for &'static str` on an enum |
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| [EnumVariantNames] | Adds an associated `VARIANTS` constant which is an array of discriminant names |
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| [EnumIter] | Creates a new type that iterates of the variants of an enum. |
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| [EnumProperty] | Add custom properties to enum variants. |
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| [EnumMessage] | Add a verbose message to an enum variant. |
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| [EnumDiscriminants] | Generate a new type with only the discriminant names. |
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| [EnumCount] | Add a constant `usize` equal to the number of variants. |
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# Contributing
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Thanks for your interest in contributing. The project is divided into 3 parts, the traits are in the
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`/strum` folder. The procedural macros are in the `/strum_macros` folder, and the integration tests are
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in `/strum_tests`. If you are adding additional features to `strum` or `strum_macros`, you should make sure
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to run the tests and add new integration tests to make sure the features work as expected.
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# Debugging
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To see the generated code, set the STRUM_DEBUG environment variable before compiling your code.
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`STRUM_DEBUG=1` will dump all of the generated code for every type. `STRUM_DEBUG=YourType` will
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only dump the code generated on a type named `YourType`.
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# Name
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Strum is short for STRing enUM because it's a library for augmenting enums with additional
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information through strings.
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Strumming is also a very whimsical motion, much like writing Rust code.
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[Macro-Renames]: https://github.com/Peternator7/strum/wiki/Macro-Renames
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[EnumString]: https://docs.rs/strum_macros/0.23/strum_macros/derive.EnumString.html
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[Display]: https://docs.rs/strum_macros/0.23/strum_macros/derive.Display.html
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[AsRefStr]: https://docs.rs/strum_macros/0.23/strum_macros/derive.AsRefStr.html
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[IntoStaticStr]: https://docs.rs/strum_macros/0.23/strum_macros/derive.IntoStaticStr.html
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[EnumVariantNames]: https://docs.rs/strum_macros/0.23/strum_macros/derive.EnumVariantNames.html
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[EnumIter]: https://docs.rs/strum_macros/0.23/strum_macros/derive.EnumIter.html
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[EnumProperty]: https://docs.rs/strum_macros/0.23/strum_macros/derive.EnumProperty.html
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[EnumMessage]: https://docs.rs/strum_macros/0.23/strum_macros/derive.EnumMessage.html
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[EnumDiscriminants]: https://docs.rs/strum_macros/0.23/strum_macros/derive.EnumDiscriminants.html
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[EnumCount]: https://docs.rs/strum_macros/0.23/strum_macros/derive.EnumCount.html
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[FromRepr]: https://docs.rs/strum_macros/0.23/strum_macros/derive.FromRepr.html
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