3 unstable releases
0.23.0 | Dec 25, 2021 |
---|---|
0.21.2 | Aug 7, 2021 |
0.21.1 | Aug 7, 2021 |
#6 in #proc-macros
47,351 downloads per month
Used in 71 crates
(via sea-strum)
87KB
1.5K
SLoC
Strum
Strum is a set of macros and traits for working with enums and strings easier in Rust.
Compatibility
Strum is currently with versions of rustc >= 1.32.0. Pull Requests that improve compatibility with older versions are welcome. The project goal is to support a rust version for at least 2 years after release and even longer is preferred since this project changes slowly.
Including Strum in Your Project
Import strum and strum_macros into your project by adding the following lines to your Cargo.toml. Strum_macros contains the macros needed to derive all the traits in Strum.
[dependencies]
strum = "0.23"
strum_macros = "0.23"
# You can also use the "derive" feature, and import the macros directly from "strum"
# strum = { version = "0.23", features = ["derive"] }
Strum Macros
Strum has implemented the following macros:
Macro | Description |
---|---|
EnumString | Converts strings to enum variants based on their name. |
Display | Converts enum variants to strings |
FromRepr | Convert from an integer to an enum. |
AsRefStr | Implement AsRef<str> for MyEnum |
IntoStaticStr | Implements From<MyEnum> for &'static str on an enum |
EnumVariantNames | Adds an associated VARIANTS constant which is an array of discriminant names |
EnumIter | Creates a new type that iterates of the variants of an enum. |
EnumProperty | Add custom properties to enum variants. |
EnumMessage | Add a verbose message to an enum variant. |
EnumDiscriminants | Generate a new type with only the discriminant names. |
EnumCount | Add a constant usize equal to the number of variants. |
Contributing
Thanks for your interest in contributing. The project is divided into 3 parts, the traits are in the
/strum
folder. The procedural macros are in the /strum_macros
folder, and the integration tests are
in /strum_tests
. If you are adding additional features to strum
or strum_macros
, you should make sure
to run the tests and add new integration tests to make sure the features work as expected.
Debugging
To see the generated code, set the STRUM_DEBUG environment variable before compiling your code.
STRUM_DEBUG=1
will dump all of the generated code for every type. STRUM_DEBUG=YourType
will
only dump the code generated on a type named YourType
.
Name
Strum is short for STRing enUM because it's a library for augmenting enums with additional information through strings.
Strumming is also a very whimsical motion, much like writing Rust code.
Dependencies
~2MB
~43K SLoC