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Wiki to doc tests #121

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68 changes: 68 additions & 0 deletions strum/src/additional_attributes.rs
Original file line number Diff line number Diff line change
@@ -0,0 +1,68 @@
//! # Documentation for Additional Attributes
//!
//! Strum supports several custom attributes to modify the generated code. At the enum level, the
//! `#[strum(serialize_all = "snake_case")]` attribute can be used to change the case used when
//! serializing to and deserializing from strings:
//!
//! ```rust
//! use std::string::ToString;
//! use strum;
//! use strum_macros;
//!
//! #[derive(Debug, Eq, PartialEq, strum_macros::ToString)]
//! #[strum(serialize_all = "snake_case")]
//! enum Brightness {
//! DarkBlack,
//! Dim {
//! glow: usize,
//! },
//! #[strum(serialize = "bright")]
//! BrightWhite,
//! }
//!
//! assert_eq!(
//! String::from("dark_black"),
//! Brightness::DarkBlack.to_string().as_ref()
//! );
//! assert_eq!(
//! String::from("dim"),
//! Brightness::Dim { glow: 0 }.to_string().as_ref()
//! );
//! assert_eq!(
//! String::from("bright"),
//! Brightness::BrightWhite.to_string().as_ref()
//! );
//! ```
//!
//! Custom attributes are applied to a variant by adding `#[strum(parameter="value")]` to the variant.
//!
//! - `serialize="..."`: Changes the text that `FromStr()` looks for when parsing a string. This attribute can
//! be applied multiple times to an element and the enum variant will be parsed if any of them match.
//!
//! - `to_string="..."`: Similar to `serialize`. This value will be included when using `FromStr()`. More importantly,
//! this specifies what text to use when calling `variant.to_string()` with the `ToString` derivation, or when calling `variant.as_ref()` with `AsRefStr`.
//!
//! - `default`: Applied to a single variant of an enum. The variant must be a Tuple-like
//! variant with a single piece of data that can be create from a `&str` i.e. `T: From<&str>`.
//! The generated code will now return the variant with the input string captured as shown below
//! instead of failing.
//!
//! ```rust,ignore
//! // Replaces this:
//! _ => Err(strum::ParseError::VariantNotFound)
//! // With this in generated code:
//! default => Ok(Variant(default.into()))
//! ```
//! The plugin will fail if the data doesn't implement From<&str>. You can only have one `default`
//! on your enum.
//!
//! - `disabled`: removes variant from generated code.
//!
//! - `message=".."`: Adds a message to enum variant. This is used in conjunction with the `EnumMessage`
//! trait to associate a message with a variant. If `detailed_message` is not provided,
//! then `message` will also be returned when get_detailed_message() is called.
//!
//! - `detailed_message=".."`: Adds a more detailed message to a variant. If this value is omitted, then
//! `message` will be used in it's place.
//!
//! - `props(key="value")`: Enables associating additional information with a given variant.
31 changes: 3 additions & 28 deletions strum/src/lib.rs
Original file line number Diff line number Diff line change
Expand Up @@ -20,33 +20,9 @@
//! strum_macros = "0.18.0"
//! ```
//!
//! # 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 |
//! | [AsRefStr] | Converts enum variants to `&'static str` |
//! | [IntoStaticStr] | Implements `From<MyEnum> for &'static str` on an enum |
//! | [EnumVariantNames] | Implements Strum::VariantNames which adds an associated constant `VARIANTS` 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. |
//!
//! [EnumString]: https://github.com/Peternator7/strum/wiki/Derive-EnumString
//! [Display]: https://github.com/Peternator7/strum/wiki/Derive-Display
//! [AsRefStr]: https://github.com/Peternator7/strum/wiki/Derive-AsRefStr
//! [IntoStaticStr]: https://github.com/Peternator7/strum/wiki/Derive-IntoStaticStr
//! [EnumVariantNames]: https://github.com/Peternator7/strum/wiki/Derive-EnumVariantNames
//! [EnumIter]: https://github.com/Peternator7/strum/wiki/Derive-EnumIter
//! [EnumProperty]: https://github.com/Peternator7/strum/wiki/Derive-EnumProperty
//! [EnumMessage]: https://github.com/Peternator7/strum/wiki/Derive-EnumMessage
//! [EnumDiscriminants]: https://github.com/Peternator7/strum/wiki/Derive-EnumDiscriminants
//! [EnumCount]: https://github.com/Peternator7/strum/wiki/Derive-EnumCount

// only for documentation purposes
pub mod additional_attributes;

/// The ParseError enum is a collection of all the possible reasons
/// an enum can fail to parse from a string.
Expand Down Expand Up @@ -204,5 +180,4 @@ pub trait VariantNames {
}

#[cfg(feature = "derive")]
#[doc(hidden)]
pub use strum_macros::*;
3 changes: 3 additions & 0 deletions strum_macros/Cargo.toml
Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,9 @@ proc-macro2 = "1.0"
quote = "1.0"
syn = { version = "1.0", features = ["parsing", "extra-traits"] }

[dev-dependencies]
strum = "0.19"

[features]
verbose-enumstring-name = []
verbose-asrefstr-name = []
Expand Down
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